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WO2023002881A1 - Dispositif de fabrication de glace et procédé de fabrication de glace - Google Patents

Dispositif de fabrication de glace et procédé de fabrication de glace Download PDF

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Publication number
WO2023002881A1
WO2023002881A1 PCT/JP2022/027367 JP2022027367W WO2023002881A1 WO 2023002881 A1 WO2023002881 A1 WO 2023002881A1 JP 2022027367 W JP2022027367 W JP 2022027367W WO 2023002881 A1 WO2023002881 A1 WO 2023002881A1
Authority
WO
WIPO (PCT)
Prior art keywords
ice
making
refrigerant
tank
aqueous solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/027367
Other languages
English (en)
Japanese (ja)
Inventor
美雄 廣兼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blanctec International Co Ltd
Original Assignee
Blanctec International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2021119773A external-priority patent/JP2023015785A/ja
Priority claimed from JP2021126961A external-priority patent/JP7607927B2/ja
Priority claimed from JP2021194329A external-priority patent/JP2023080809A/ja
Application filed by Blanctec International Co Ltd filed Critical Blanctec International Co Ltd
Priority to CN202280051120.7A priority Critical patent/CN117677810A/zh
Priority to US18/290,887 priority patent/US20240255202A1/en
Priority to EP22845815.4A priority patent/EP4375593A4/fr
Publication of WO2023002881A1 publication Critical patent/WO2023002881A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C5/00—Working or handling ice
    • F25C5/18—Storing ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2301/00—Special arrangements or features for producing ice
    • F25C2301/002—Producing ice slurries

Definitions

  • the present invention relates to, for example, an ice-making apparatus equipped with a metal ice-making body, an ice-making apparatus for producing flake ice used in ice slurry, and an ice-making method for producing flake ice.
  • ice slurry is used for freezing the food to be frozen, and the food to be frozen is immersed in the ice slurry and instantaneously frozen to maintain the freshness of the food.
  • ice slurry is produced by dropping ice flakes (ice chips) dropped from an ice slurry raw material production apparatus (200) into an ice storage tank (500). The ice slurry in the ice storage tank (500) is supplied to the refrigerator (6) through the ice slurry supply pipe (45).
  • a flake ice (flaky ice) manufacturing apparatus as disclosed in Patent Document 2 and Patent Document 3 listed below is also known.
  • These flake ice making apparatuses are provided with metal ice making plates (also called “metal ice making plates”, “metal plates”, “ice making bodies”, etc.).
  • Metal ice-making plates are used to produce ice flakes, ice slurries, and the like by freezing aqueous solutions of solutes such as salt, calcium chloride, and ethanol.
  • ice making plates There are mainly plate-type and drum-type ice making plates.
  • Metal materials such as iron, stainless steel, aluminum, and copper are used for the ice making plate, and the ice making surface is subjected to surface treatment such as electroless nickel plating and chromium plating.
  • the ice making plate has inside it a refrigerant passage that is connected to the refrigerator and allows refrigerant gas to flow.
  • Various measures have been taken to improve the fluidity of the refrigerant gas and ensure the refrigerating capacity of the refrigerant passage.
  • paragraph 0051 of Patent Document 2 it is described that the refrigerant flows down while swirling.
  • Paragraphs 0037 and 0058 of Patent Literature 3 describe forming a curved portion in the coolant channel.
  • the ice making plate in Patent Document 2 employs a drum-type configuration similar to that of the ice slurry raw material manufacturing apparatus (200) disclosed in Patent Document 1.
  • the ice making plate in Patent Document 3 employs a plate-type configuration having a flat plate shape.
  • An object of each disclosed aspect of the present invention is to provide an ice-making device and an ice-making method that are superior to the conventional ones.
  • ⁇ Problems related to the first disclosure mode> In the conventional ice slurry production apparatus (200) and refrigeration system disclosed in Patent Document 1, the ice slurry raw material production apparatus (200) is installed above the ice storage tank (500), and the ice storage tank (500) freezes. Ice slurry was supplied to the device (6) through an ice slurry supply pipe (45). Therefore, the size of the ice slurry production apparatus and the refrigeration system tends to increase, and it is not easy to reduce the size of the ice slurry production apparatus and the refrigeration system.
  • the object of the invention according to the first disclosed aspect is to provide an ice-making device (also referred to as an "ice slurry manufacturing device") that can be easily miniaturized.
  • the object of the invention according to the second disclosed aspect is to provide an ice-making device and an ice-making method with high refrigerating capacity.
  • An object of the invention according to the third disclosed aspect is to provide an ice making device and an ice making method with high refrigerating capacity.
  • Ice slurry and ice (hereinafter referred to as “slurry, etc.”) must be prepared in advance. If the ice making device malfunctions, it becomes impossible to manufacture ice slurry in advance, and the demand for ice slurry cannot be met. Therefore, these ice making devices are required to have high reliability.
  • the object of the invention according to the fourth disclosed aspect is to provide a highly reliable ice-making device and ice-making method.
  • an excellent ice-making device and ice-making method can be provided.
  • the invention includes an ice slurry production tank for storing brine, an ice making unit disposed inside the ice slurry making bath and capable of being immersed in brine; with
  • the ice-making unit includes an ice-making plate having an ice-making surface for circulating a refrigerant supplied from a refrigerator and generating brine ice on at least one surface of the ice-making plate; a flow forming part that provides a flow of brine to the ice making surface;
  • the ice making apparatus is characterized by comprising a sweeping section that separates ice produced on the ice making surface from the ice making surface by being displaced with respect to the ice making surface.
  • another invention is characterized in that the sweeping section is arranged in a driving section that rotates or rotates and reciprocates with respect to the ice making surface (1). ).
  • the ice making section further includes a holding section that holds at least the ice making plate and the driving section integrally. Or the ice making device according to (2).
  • an invention relating to a second disclosed aspect comprises a metal body in which a coolant channel is formed,
  • the ice making device is characterized in that uneven portions are formed on the channel surface of the coolant channel.
  • the third aspect of the invention relates to an ice-making unit in contact with brine, a first refrigerant passage formed to pass through the ice making unit and capable of flowing a first refrigerant; a second refrigerant passage formed to pass through the ice-making unit and capable of flowing a second refrigerant having a lower evaporation temperature than the first refrigerant,
  • the ice making apparatus is characterized in that the ice making section cooled by the first refrigerant is cooled by the second refrigerant.
  • the third disclosed aspect is to cool the ice-making unit by passing the first refrigerant through the ice-making unit in contact with the brine, and then cool the ice-making unit so that is switched to a second refrigerant having a low refrigeration temperature, and the ice making section cooled by the first refrigerant is cooled by the second refrigerant.
  • the third disclosed aspect provides an ice making unit in contact with brine, a first refrigerant passage formed to pass through the ice making unit and capable of flowing a first refrigerant; a second refrigerant passage formed to pass through the ice making unit and capable of flowing a second refrigerant having a lower evaporation temperature than the first refrigerant,
  • the ice making section is cooled with the first refrigerant and then cooled with the second refrigerant.
  • the invention relating to a fourth disclosed aspect relates to the following ice making device and ice making method.
  • an ice slurry production tank for storing brine for storing brine
  • an ice making unit disposed inside the ice slurry making tank and capable of coming into contact with the brine
  • the ice-making unit includes an ice-making plate having an ice-making surface; a sweeper that displaces with respect to the ice making surface to separate the ice formed on the ice making surface from the ice making surface;
  • an excellent ice-making device and ice-making method can be provided.
  • FIG. 1 is a perspective view schematically showing a first embodiment of an ice-making device (also referred to as an “ice slurry making device”) and a refrigeration system of the first disclosed aspect
  • FIG. FIG. 2B is a plan view schematically showing the first embodiment of the refrigerant pipe of the disk portion
  • FIG. 8B is a plan view schematically showing the second embodiment of the refrigerant pipe of the disk portion
  • FIG. 4 is a side view schematically showing the flow of an aqueous solution around the disk
  • (a) is a side view schematically showing the principle of separating ice from the disc portion by the buff of the first embodiment related to the sweeping portion
  • FIG. 4 is a side view schematically showing the principle of separating ice from the part;
  • (a) is a top view which shows typically 2nd Embodiment which concerns on a freezing tank
  • (b) is a side view which shows typically the freezing tank which concerns on (a).
  • (a) is a top view which shows typically 3rd Embodiment which concerns on a freezing tank
  • (b) is a side view which shows typically the freezing tank which concerns on (a).
  • (a) is a top view which shows typically 4th Embodiment which concerns on a freezing tank
  • (b) is a side view which shows typically the freezing tank which concerns on (a). It is a side view which shows typically the refrigerating system which concerns on other embodiment.
  • FIG. 9 is a plan view schematically showing the refrigeration system according to the embodiment of FIG. 8;
  • FIG. 10 is an enlarged view that schematically shows an ice slurry manufacturing device according to the refrigeration system shown in FIGS. 8 and 9;
  • FIG. It is an explanatory view showing typically a refrigerating system concerning other embodiments.
  • FIG. 11 is an enlarged view showing a modification of the ice slurry production apparatus shown in FIGS. 9 and 10;
  • FIG. 10 is a side view showing a modification of the refrigeration system shown in FIGS. 8 and 9;
  • FIG. FIG. 14 is a plan view schematically showing the refrigeration system according to the embodiment of FIG. 13;
  • (a) is an enlarged view showing a modified example of the ice slurry producing device for the refrigeration system shown in FIG.
  • FIG. 11 is a plan view showing a modified example of the hatch portion and the ice slurry production apparatus shown in FIG. 10;
  • FIG. 12 is a side view showing a modification of the ice slurry manufacturing apparatus shown in FIG.
  • FIG. 11 is a partially simplified side view showing the ice flake manufacturing apparatus according to the first embodiment of the second disclosed aspect, (b) is a front view showing the same partially simplified flake ice manufacturing apparatus, and (c) ) is a partially simplified plan view showing the same flake ice making apparatus, and (d) is a cross-sectional view schematically showing the inside of the housing along line BB of (c). It is a figure for demonstrating a water-spray nozzle part.
  • FIG. 2 is a cross-sectional view schematically showing the flake ice making apparatus along line AA of FIG. 1(c);
  • FIG. 2 is an explanatory diagram schematically showing an ice maker;
  • FIG. 10 is an explanatory diagram schematically showing an uneven portion;
  • FIG. 10 is an explanatory view schematically showing a longitudinal section of a modified example of a folded portion of a coolant flow path
  • FIG. 11 is an explanatory diagram schematically showing a state of a modification related to the folded portion of the coolant flow path as viewed obliquely. It is explanatory drawing which shows the modification which concerns on a metal plate.
  • FIG. 9 is an explanatory view schematically showing a longitudinal section of a coolant channel related to the metal plate of FIG. 8
  • FIG. 10 is an explanatory view schematically showing the arrangement of ridges according to FIG. 9
  • FIG. 2 is a partially cutaway perspective view of the drum of the drum-type flake ice making apparatus.
  • FIG. 11 is a perspective view showing a channel wall provided in the drum of FIG.
  • FIG. 10 is a perspective view schematically showing an ice making device (also referred to as an “ice slurry making device”) according to an embodiment of the third disclosed aspect; It is a figure for demonstrating the supply of a 1st refrigerant
  • (a) is a plan view schematically showing a first embodiment relating to refrigerant piping of a disk portion
  • (b) is a plan view schematically showing a second embodiment relating to refrigerant piping of a disk portion.
  • FIG. 10 is a perspective view schematically showing an ice making device (also referred to as an “ice slurry making device”) according to an embodiment of the third disclosed aspect; It is a figure for demonstrating the supply of a 1st refrigerant
  • (a) is a plan view schematically showing a first embodiment relating to refrigerant piping of
  • FIG. 4 is an explanatory view showing first refrigerant passages and second refrigerant passages in the disk portion distinguished by symbols;
  • FIG. 4 is a side view schematically showing the flow of an aqueous solution around the disk;
  • (a) is a side view schematically showing the principle of separating ice from the disc portion by the buff of the first embodiment related to the sweeping portion;
  • FIG. 4 is a side view schematically showing the principle of separating ice from the part;
  • FIG. 11 is a transparent perspective view showing an ice making device according to an embodiment of a fourth aspect of disclosure; It is a perspective view which sees through and shows the ice-making apparatus which concerns on embodiment from another angle.
  • 1 is an explanatory diagram schematically showing an ice making system according to an embodiment;
  • FIG. 4 is an explanatory diagram schematically showing an ice making section; It is an explanatory view showing a disc part typically.
  • (a) is an explanatory diagram showing an example in which the scraping tooth contacts the disk portion 4014
  • (b) is an explanatory diagram showing an example in which a clearance is interposed between the scraping tooth 4048 and the disk portion 4014.
  • FIG. FIG. 3 is an explanatory diagram showing an image of ice slurry taken out from an ice-making device;
  • (a) is a side view schematically showing an ice making tank provided with a stirring device, and
  • (b) is a plan view schematically showing the ice making tank similarly provided with a stirring device.
  • FIG. 1 shows a first embodiment of the ice slurry production apparatus and refrigeration system of the first disclosed aspect.
  • a refrigeration system 10 shown in FIG. 1 is configured by combining an ice slurry manufacturing device 11, a refrigeration tank 12, an aqueous solution pump 13, and the like.
  • the ice slurry manufacturing apparatus 11 is, for example, a method of depositing ice from an aqueous solution of salt or the like (salt water serving as brine) to form flake-like (flaky, flake-like, small block-like, or granular) ice. (Flake ice) can be created.
  • This ice slurry manufacturing apparatus 11 has a refrigerator 14, a flake ice making section 15 as an ice making section, a refrigerant guide section 16, and the like. Furthermore, in the ice slurry manufacturing apparatus 11, the refrigerator 14, the ice flake making section 15, and the refrigerant guide section 16 are mounted on a frame section 17 as a holding section and integrated with each other.
  • the refrigerator 14, the flake ice making unit 15, and the refrigerant guide unit 16 of the ice slurry manufacturing apparatus 11 constitute a refrigeration cycle, circulate a predetermined refrigerant liquid (liquid refrigerant), and compress, condense, and expand the refrigerant. , and evaporation.
  • a predetermined refrigerant liquid liquid refrigerant
  • compress, condense, and expand the refrigerant. and evaporation.
  • Refrigerant is sent from the refrigerator 14 to the flake ice making section 15 via the refrigerant guide section 16 .
  • the refrigerant guide section 16 includes a refrigerant introduction pipe 18a that introduces the refrigerant from the refrigerator 14 into the ice flake preparation section 15, and a refrigerant outlet pipe 18b that returns the refrigerant drawn out from the ice flake preparation section 15 to the refrigerator 14. .
  • the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b for example, a general refrigerant pipe such as a copper pipe covered with a heat insulating material can be adopted. Moreover, the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b can be formed by connecting such refrigerant pipes via general pipe joints.
  • each end of the refrigerant introduction pipe 18a and the refrigerant discharge pipe 18b is connected to the refrigerator 14 and the ice flake making unit 15 via pipe joints, although detailed illustration is omitted.
  • the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b have a curved shape that curves upward into an inverted U shape.
  • the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b have the same length and size.
  • the refrigerant inlet pipe 18a and the refrigerant outlet pipe 18b have a freezer-tank straddle portion 19 at the inner portion bent in an inverted U shape.
  • the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b for example, a flexible pipe that can be directly bent by hand without using a tool by an operator who assembles the ice slurry manufacturing apparatus 11 is adopted. is also possible. Also in this case, it is desirable to cover the periphery of the flexible tube with a heat insulating material.
  • the flake ice making unit 15 includes a cooling unit 21, a rotation driving unit 22 as a driving unit, a sweeping unit 23 as an ice separating unit, and the like.
  • the cooling section 21 includes a disk section 26 as an ice making plate and a refrigerant pipe 28 .
  • the disk portion 26 is formed of a metal plate having a rectangular (here, square) plate surface (ice making surface) and a predetermined thickness, and is fixed to the frame portion 17 (described later).
  • the disk portion 26 is not limited to a rectangular shape and may be circular.
  • Examples of the material of the disk portion 26 include copper, stainless steel, steel subjected to surface treatment so as to obtain an antirust effect, aluminum, duralumin, and the like.
  • the size (dimension) of the disk portion 26 can be, for example, about 30 cm square. Further, in this embodiment, the upper surface (plate surface 26a) and the lower surface (plate surface 26b) of the disk portion 26 are processed to be substantially flat and parallel to each other. Further, inside the disk portion 26, a plurality of holes are formed so as to be arranged in parallel at substantially equal intervals and penetrate therethrough.
  • the above-described refrigerant pipe 28 is passed through the hole inside the disk portion 26 .
  • the refrigerant pipe 28 is formed in a meandering shape in which straight portions and curved portions are alternately combined. Furthermore, one end of the refrigerant pipe 28 is connected to the refrigerant introduction pipe 18a, and the other end is connected to the refrigerant outlet pipe 18b. Refrigerant supplied from the refrigerator 14 flows through the inside (pipe line) of the refrigerant pipe 28 .
  • the outer peripheral surface of the refrigerant pipe 28 is in contact with the inner peripheral surface of the hole of the disk portion 26 so as to allow heat transfer.
  • a copper pipe which generally has a high thermal conductivity, can be exemplified.
  • the refrigerant pipe 28 is not limited to being formed by inserting a pipe as a physical tubular component into a hole in the disk portion 26 .
  • a pipe as a physical tubular component
  • the coolant flows while being in contact with the inner peripheral surface of the hole of the disc portion 26 .
  • the tubular parts are omitted as described above, the U-shaped tube to be turned back is connected to the disk portion 26, and the internal space of the U-shaped pipe is fluid-tightly connected to the internal space in the hole of the disk portion 26. Therefore, it is possible to form a meandering coolant flow path.
  • a meandering hole having a straight portion and a folded portion inside the disc portion 26 .
  • a casting core for forming the coolant flow path and form the disk portion 26 with the meandering hole by casting.
  • the ends 28a and 28b of the refrigerant pipe 28 connected to the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b are different from each other when the disk portion 26 is viewed from above as shown in FIG. 2(a). extends in a direction perpendicular to the straight portion of the Also, the end portion 28b of the refrigerant pipe 28 connected to the refrigerant lead-out pipe 18b has a positional relationship in which it overlaps the other portion in the thickness direction of the disk portion 26 .
  • the refrigerant pipe 28 can be shaped to meander more times, and can be formed to overlap, for example, two, three, or more layers in the thickness direction of the disk portion 26 . By doing so, the flow rate of the coolant flowing inside the disk portion 26 can be increased, and the disk portion 26 can be cooled more effectively.
  • the ends 28a and 28b of the refrigerant pipe 28 connected to the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b are shown in FIG. , may be formed to extend in a direction parallel to other straight portions. By doing so, it is possible to easily process the refrigerant pipe 28 and drill holes in the disk portion 26 . Also, the thickness of the disk portion 26 can be easily reduced.
  • the sweeping section 23 described above is provided with buff supports 31, and a plurality of buffs 33 are attached to each buff support 31.
  • the buffs 33 are arranged so as to face the plate surfaces 26 a and 26 b of the disk portion 26 in the cooling portion 21 .
  • the buff 33 is arranged so as to contact the plate surfaces 26a and 26b of the disk portion 26 with moderately weak pressure (low surface pressure).
  • the buff 33 has a function (sweeping function) of sweeping the ice exposed on the plate surfaces 26a and 26b of the disc portion 26 to separate the ice from the disc portion 26.
  • materials and materials for the buff 33 it is possible to adopt various materials that are generally used for polishing and the like.
  • urethane, other synthetic resins, metal, or wool can be used as the material of the buff 33 .
  • materials for the buff 33 include sponges, foams, brushes, scrubbing brushes, resin nets, and non-woven fabrics using the various materials described above.
  • a material having a certain degree of flexibility can be exemplified.
  • each buff 33 is attached to a rod-shaped spoke 34 provided on the buff support 31 .
  • Four spokes 34 of the buff support 31 are arranged at intervals of 90 degrees so as to face the plate surfaces 26a and 26b of the disk portion 26.
  • the buff support 31 is integrally connected to a round bar-shaped rotation transmission shaft 35 .
  • the rotation transmission shaft 35 passes through the disk portion 26 in the thickness direction, avoiding the refrigerant pipe 28, so that it can rotate in forward and reverse directions around the axis.
  • the rotation transmission shaft 35 can be rotationally displaced together with the buff 33 with respect to the stationary disk portion 26 .
  • each buff 33 has a blade-like (elliptical) shape, and the buffs 33 are arranged in a four-bladed propeller shape, and each plate surface of the disk portion 26 26a and 26b.
  • Such sweeping section 23 is connected to rotation drive section 22 via rotation transmission shaft 35 .
  • a motor (buff drive motor) is incorporated in the rotation drive unit 22, and as will be described later, the rotation drive unit 22 moves the aqueous solution Ws stored in the freezing tank 12 (liquid level at two points in FIG. 1). It is possible to continuously rotate the sweeping part 23 in the phantom (illustrated by the dashed line).
  • the rotation drive section 22 can be a geared motor that integrally includes a motor and a reduction section (gear section). Further, the rotation driving part 22 is positioned above the liquid surface of the aqueous solution Ws, and is arranged so as to protrude outside the aqueous solution Ws. Further, the rotation driving section 22 is not limited to one that rotates the sweeping section 23 in one direction, and may be one that rotates and reciprocates (performs reciprocating rotational motion in forward and reverse directions).
  • the arrangement of the buffs 33 described above is not limited to those shown in FIGS. 1 and 3, and various aspects can be adopted.
  • the number of buffs 33 may be less than four or five or more for each plate surface 26a, 26b of the disk portion 26.
  • the aforementioned frame portion 17 is configured by, for example, connecting rod-shaped parts to form a framework.
  • a material for the frame portion 17 a general angle material, a round pipe, a square pipe, an extruded material, or the like can be used.
  • the parts of the frame portion 17 are drawn in a strip-like shape, but it is desirable to select the material in consideration of the required strength and structure.
  • welding, screw tightening (including bolt tightening), etc. can be adopted for joining the parts of the frame portion 17 .
  • metals and synthetic resins can be used, and among these metals, various common metals such as steel, stainless steel, and aluminum can be used. is. Furthermore, when using a metal such as steel, it is conceivable to perform various general surface treatments in consideration of rust prevention.
  • a freezer 14 and a flake ice making unit 15 are fixed to the frame unit 17 , and the frame unit 17 supports the freezer 14 and the flake ice making unit 15 .
  • the freezer 14 and the ice flake making unit 15 can be fixed to the frame unit 17 by general means such as bolting or screwing.
  • the frame portion 17 supports the ice flakes making section 15 so that the rotation driving portion 22 of the ice flakes making portion 15 is out of the aqueous solution Ws.
  • the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b of the refrigerant guide portion 16 are connected to the refrigerator 14 and the ice flake making section 15, and the frame portion 17 connects the refrigerator 14 and the ice flake making portion. 15, the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b of the refrigerant guide portion 16 are also supported.
  • the refrigerant introduction pipe 18a and the refrigerant discharge pipe 18b of the refrigerant guide portion 16 are supported in a floating state with respect to the frame portion 17. It is also possible to form a portion (restraining portion) that contacts the coolant lead-out pipe 18b and supports the coolant lead-out pipe 18a and the coolant lead-out pipe 18b.
  • the refrigerator 14 When the ice slurry manufacturing device 11 is placed on the floor or the like, the refrigerator 14 is placed on the floor with a portion of the frame portion 17 positioned below therebetween. On the other hand, the ice flake making unit 15 is supported at a position horizontally displaced from the refrigerator 14 by a predetermined amount and at a position slightly higher than the lower end of the refrigerator 14 .
  • the refrigerant tank straddling section 19 of the refrigerant introduction pipe 18a and the refrigerant outlet pipe 18b is positioned in a downward open state.
  • a part of the frame part 17 and the freezing tank 12 is virtually notched as indicated by a chain double-dashed line.
  • the height from the lower end to the upper end of the ice slurry production device 11 can be set to about 80-90 cm. Furthermore, the lower end of the ice slurry production device 11 can be the portion of the frame portion 17 that contacts the floor surface, and the upper end of the ice slurry production device 11 can be the upper end of the rotary drive portion 22 .
  • the height dimension of the ice slurry manufacturing apparatus 11 By setting the height dimension of the ice slurry manufacturing apparatus 11 to about 80 cm, the height of the freezer tank 12, which will be described later, becomes a height at which the worker who performs the freezing work can easily work.
  • the freezing tank 12 is formed in a rectangular container shape and has an open top. Although omitted in FIG. 1, the freezer tank 12 is surrounded by a heat insulating material.
  • various general materials can be used as the heat insulating material.
  • each wall (including the bottom wall) of the freezing tank 12 can be made, for example, with a built-in heat insulating material or hollow. If the walls of the freezing tank 12 alone can provide sufficient heat insulation, the heat insulating material around the freezing tank 12 can be omitted as appropriate.
  • the aqueous solution Ws indicated by the two-dot chain line in FIG. 1 is the undiluted solution of the ice slurry (also called brine).
  • a saline solution having a predetermined concentration here, 23.5%
  • the amount of the aqueous solution Ws can be, for example, approximately 200 L (liters).
  • the refrigerator 14 of the ice slurry manufacturing apparatus 11 is positioned outside the freezing tank 12 and faces the wall portion 12a at one end in the longitudinal direction of the freezing tank 12 from the outside.
  • the flake ice making part 15 is inside the wall part 12a.
  • a predetermined amount of the aqueous solution Ws is stored in the freezing tank 12 .
  • a portion of the flake ice making section 15 from the bottom to the middle height is immersed in the aqueous solution Ws in the freezing tank 12 .
  • a disc portion 26 is arranged at the bottom of the ice flakes making portion 15, and when the ice flakes making portion 15 is immersed in the aqueous solution Ws, the entire disk portion 26 is also immersed in the aqueous solution Ws.
  • the aqueous solution pump 13 pumps up the aqueous solution Ws as indicated by a two-dot chain line arrow A1 in FIG. 1 and leads it to the freezing tank 12 as indicated by an arrow A2. Then, the aqueous solution pump 13 ejects the aqueous solution Ws toward the disk portion 26 of the ice flake producing portion 15 .
  • arrows A1 and A2 indicate paths of the aqueous solution, and illustration of piping is omitted.
  • aqueous solution pump 13 Various general pumps can be employed as the aqueous solution pump 13, but it is considered to select the aqueous solution pump 13 in consideration of solids (here, ice flakes) being mixed with the aqueous solution Ws. be done. Further, by passing the aqueous solution Ws mixed with flake ice through the piping or through the aqueous solution pump 13, the effect of preventing clogging of the flow path may be obtained. However, in order to prevent flake ice from passing through the aqueous solution pump 13, it is conceivable to dispose a filter for removing flake ice and foreign substances from the aqueous solution Ws at the inlet of the pipe or at the stage preceding the aqueous solution pump 13. .
  • the aqueous solution Ws delivered by the aqueous solution pump 13 is ejected from the nozzle portion 41 as shown in FIG.
  • the nozzle part 41 is immersed in the aqueous solution Ws stored in the freezing tank 12, and the aqueous solution Ws ejected from the nozzle part 41 (indicated by an arrow A3 here) entrains the aqueous solution Ws in the freezing tank 12 to form a water flow. to form Then, the aqueous solution Ws (arrow A3) ejected from the nozzle portion 41 causes the aqueous solution Ws stored in the freezing tank 12 to generate a flow velocity and give momentum. That is, the aqueous solution pump 13, the nozzle portion 41, and the like constitute a water flow generating mechanism (propulsion mechanism) as a flow forming portion that forms the flow of the aqueous solution Ws.
  • the nozzle portion 41 it is possible to adopt various common ones.
  • Examples of the nozzle part 41 include those that eject the aqueous solution Ws in a conical shape as indicated by an arrow A3, and those that eject the aqueous solution Ws linearly (not shown).
  • the nozzle part 41 is immersed in the aqueous solution Ws so as to generate a water flow around the disk part 26 in the flake ice making part 15 .
  • the water flow generated by the aqueous solution discharged from the nozzle portion 41 circulates between the wall portions 12a and 12b located at the ends of the freezing tank 12 in the length direction (longitudinal direction, horizontal direction in FIG. 1).
  • the disk portion 26 is cooled by the cold heat of the refrigerant from the refrigerator 14 , the aqueous solution Ws flowing around the disk portion 26 is cooled by the disk portion 26 .
  • the conditions are adjusted, ice deposits on the plate surfaces 26 a and 26 b of the disk portion 26 , and fine ice adheres to the periphery of the disk portion 26 .
  • the ice exposed and adhered in this manner is swept from the disc portion 26 by the buff 33 of the sweeping portion 23 continuously rotating and colliding with the adhered ice, as indicated by the arrow A4 in FIG. taken and separated. Since the sweeping section 23 is rotating, the buff 33 will pass through a fixed place intermittently, and the ice will be separated from the disk section 26 before it grows large.
  • the ice separated from the plate surfaces 26a and 26b of the disk portion 26 becomes ice flakes, and these ice flakes are caught in the flow of the aqueous solution Ws (indicated by arrow A5) and blown off, and the aqueous solution Ws reaches its freezing point ( Cool to about -21°C in the case of the 23.5% saline solution described above).
  • the amount of flake ice in the aqueous solution Ws gradually increases, and the amount of ice flakes in the aqueous solution Ws increases to a level suitable for the freezing work of the product to be frozen. (for example, about ⁇ 21° C.) and an ice slurry having an ice concentration (IPF) of about 10% to 30%.
  • IPF ice concentration
  • the 23.5% salt water ice slurry described above maintains the freezing point temperature (about -21°C) as long as the ice remains, so it can be frozen effectively. Furthermore, the freezing of the products to be frozen can be carried out, for example, by placing the products to be frozen in a metal basket indicated by reference numeral 45 in FIG. It is possible.
  • the water flow generating mechanism such as the aqueous solution pump 13 and the nozzle portion 41 to the frame portion 17 .
  • the water flow generating mechanism can be provided integrally with the ice slurry manufacturing apparatus 11 .
  • the aqueous solution pump 13 may be installed at a position away from the frame portion 17 , and only the nozzle portion 41 and the piping connected to the nozzle portion 41 may be fixed to the frame portion 17 .
  • the weight of the frame portion 17 including each device to be supported can be reduced.
  • FIG. 4(a) schematically shows a state in which the buff 33 separates ice from the disc portion 26.
  • FIG. The buffs 33 attached to the spokes 34 horizontally move (rotate) from left to right in the figure as indicated by the two-dot chain arrow C.
  • the buff 33 is in contact with the upper plate surface 26a of the disc portion 26 with moderately weak pressure (low surface pressure).
  • the buff 33 is made of a material having a certain degree of flexibility, and has a rectangular (here, substantially square) cross-sectional shape.
  • the buff 33 generates friction by moving while being in contact with the plate surface 26a of the disk portion 26, and is deformed so that the cross-sectional shape becomes a parallelogram.
  • the buff 33 strikes the ice (not shown) generated on the plate surface 26a of the disk portion 26 to apply an external force to the ice, thereby sweeping the ice off the plate surface 26a of the disk portion 26.
  • FIG. Furthermore, the buff 33 sweeps away ice on the opposite side of the disk portion 26 (the lower plate surface 26b) according to the same principle.
  • the cross-sectional shape of the buff 33 and the cross-sectional shape of the spokes 34 are both rectangular in order to explain the principle of sweeping by the buff 33.
  • the spokes 34 are not limited to this.
  • the spokes 34 may be square bars, round bars, or other shapes.
  • the cross-sectional shape of the buff 33 can be a shape other than a rectangle, and examples of the shape other than the rectangle include a triangular shape, a polygonal shape, a perfect circular shape, an elliptical shape, and the like.
  • each buff can adopt various shapes other than the blade shape.
  • the planar shape of the buff 33 is, for example, a perfect circular plate shape with a diameter of about 30 cm. It is also possible to rotate horizontally. Furthermore, it is also possible to make the outer diameter of the buff 33 smaller than about 30 cm and rotate one or more buffs 33 while rotating.
  • power is transmitted from the side portion (side of the end portion) of the disk portion 26 to a buff (not shown) without forming a hole through which the rotation transmission shaft 35 is passed through the disk portion 26.
  • a buff not shown
  • the sweeping section 23 can sandwich the disk section 26 and operate like a car wiper to sweep away the ice.
  • a gap of a predetermined amount (for example, 1 mm or less to several mm) is provided between the buff 33 and each of the plate surfaces 26a and 26b of the disk portion 26, and ice that has grown to a size larger than the gap is swept away.
  • fixing of the buff 33 to the spokes 34 can be performed by various general methods.
  • fixing methods include adhesion, screwing (bolting), riveting, and clamping.
  • a metal plate 38 as shown in FIG. 4(b).
  • a synthetic resin plate can also be used.
  • these rigid bodies it is conceivable to interpose a gap H between them and the disk portion 26 as shown in FIG. 4(b). By doing so, abrasion of the metal plate 38 and the like and the disc portion 26 can be prevented.
  • turbulence can be generated, for example, in front and behind the metal plate 38 and the like, as indicated by a plurality of arrows D in FIG. 4(b). Further, although not shown, it is considered that turbulence can also be generated in the gap H between the metal plate 38 or the like and the disk portion 26 . Even if the metal plate 38 or the like and the disk portion 26 are not in contact with each other, the ice can be separated from the disk portion 26 using this turbulent flow. This turbulent flow is likely to occur by moving the metal plate 38 or the like relatively quickly.
  • fixing of the metal plate 38 or the like to the spokes 34 can be performed in various general manners.
  • fixing methods include screwing (bolting), riveting, clamping, welding, and the like.
  • buff 33, the metal plate, etc. can be replaced, for example, periodically for maintenance.
  • the ice adhering to the plate surfaces 26 a and 26 b of the disk portion 26 is separated from the disk portion 26 by the buff 33 of the sweeping portion 23 .
  • ice adhering to a portion not in contact with the buff 33, such as the side surface of the disc portion 26 is hit by the water flow of the aqueous solution Ws, but no further external force acts thereon.
  • the grown ice presses the surrounding equipment (for example, the refrigerant piping 28, etc.). , it is also conceivable that an excessive load is applied to surrounding equipment. In addition, it is conceivable that the grown ice reaches the plate surfaces 26a and 26b of the disk portion 26 and interferes with the buff 33 to hinder the operation of the buff 33.
  • the ice adhesion preventing portion 46 is formed so as to cover the curved portion of the refrigerant pipe 28 protruding from the disk portion 26 .
  • the anti-ice adhesion part 46 can be made of, for example, a synthetic resin having a lower thermal conductivity than the metal that is the material of the disc part 26 .
  • the surface of the ice adhesion preventing portion 46 can be molded to have a smooth shape without sharp corners, making it difficult for ice to adhere.
  • only the outline of the anti-ice adhesion portion 46 is indicated by a chain double-dashed line.
  • the refrigerator 14 the disk section 26, the rotation driving section 22, and the buff 33 are Since it is configured integrally, the ice slurry manufacturing device 11 can be unitized. Therefore, when making ice slurry, if the ice slurry making apparatus 11 is placed on the floor so that the flake ice making unit 15 is inside the freezing tank 12 and the refrigerator 14 is positioned outside the freezing tank 12, It is often possible to install the equipment necessary for making ice flakes more simply and easily than before.
  • the disk portion 26 of the ice flake producing unit 15 is directly immersed in the aqueous solution Ws in the freezing tank 12, no piping is required to feed the ice flakes into the freezing tank 12, and ice slurry can be produced. can be performed by a simple mechanism. Since the ice slurry can be produced directly in the freezing tank 12 where the freezing operation is performed, the conventional operation of once making ice and mixing the ice with the stock solution to prepare the ice slurry becomes unnecessary.
  • the operation of the refrigeration system 10 will be explained.
  • the temperature of the aqueous solution Ws for example, 23.5% saline solution
  • the ice slurry manufacturing device 11 is started, and the flake ice manufactured in the disk section 26 first (Flake ice) melts immediately and cools the aqueous solution Ws. For this reason, the temperature of the aqueous solution Ws initially decreases.
  • the temperature of the aqueous solution Ws drops to ⁇ 21° C., which is the freezing point of the aqueous solution Ws, the ice flakes produced by the disk portion 26 do not melt and are mixed with the aqueous solution Ws to form slurry.
  • the proportion of ice in the slurry (ice concentration) can be gradually increased from zero by the operation of the ice slurry production device 11 to 10 to 30% suitable for freezing.
  • the ice concentration of the slurry should be kept constant by adjusting the amount of flake ice produced to match the amount of cold heat required for freezing the product (for example, by adjusting the output of the refrigerator). can be held.
  • the refrigeration system 10 and the ice slurry production device 11 of this embodiment it is possible to produce the required amount of ice slurry when required. Therefore, equipment for pre-storing the produced ice slurry and sending it to the freezing tank 12 when necessary is unnecessary, and the freezing system 10 and the ice slurry producing apparatus 11 can be made smaller and lighter as a whole. It is easy to do.
  • the refrigerator 14 can be and the flake ice making unit 15 can be moved integrally. For this reason, for example, after the freezing operation, the operator lifts the ice slurry manufacturing apparatus 11, moves the flake ice making unit 15 so that it is taken out from the freezing tank 12, and dips it in the aqueous solution Ws of the flake ice making unit 15 with tap water. It is also possible to clean and maintain the parts that were covered.
  • the ice slurry manufacturing device 11 can be installed in a different orientation, not limited to the orientation shown in FIG.
  • the nozzle part 41 can also be moved.
  • a sufficient water flow can be generated in the aqueous solution Ws, it is possible to change the direction of the ice slurry manufacturing apparatus 11 without changing the position of the nozzle part 41 .
  • the nozzle part 41, the aqueous solution pump 13, etc. are assembled to the frame part 17, the direction of the nozzle part 41, the aqueous solution pump 13, etc. is also changed integrally with the flake ice making part 15, etc.
  • the ice on both the plate surfaces 26a and 26b of the disk portion 26 in the ice slurry manufacturing apparatus 11 is swept off, so the area to which the ice adheres can be increased. It is easy and it is possible to produce a large amount of ice slurry in a short time.
  • a plurality of (for example, two) disc portions 26 may be arranged in parallel, buffs facing each disc portion 26 may be provided, and these buffs may be rotated by the rotation transmission shaft 35 . By doing so, it is possible to produce a large amount of ice slurry in a shorter time.
  • the frame section 17 supports the ice flakes making section 15 so that the rotation driving section 22 of the ice flakes making section 15 is out of the aqueous solution Ws. Therefore, even if the ice flake making unit 15 is immersed in the aqueous solution Ws, the rotation driving unit 22 can be protected from the aqueous solution Ws.
  • the ice melts more easily than when flake ice is produced and ice slurry is produced in a closed environment, for example.
  • the aqueous solution Ws salt water brine
  • alcohol alcohol brine
  • alcohol has a thermal conductivity of around 0.20 W/mK, and the thermal conductivity of salt water (approximately 0.58 W/mK) and the thermal conductivity of flake ice (approximately 2.2 W/mK). /mK).
  • freezing with alcohol brine is freezing using temperature change due to sensible heat, but freezing with salt water brine is freezing mainly using state change due to latent heat.
  • freezing with salt water brine uses both ice and an aqueous solution to cool the product to be frozen, and the product is frozen by hitting (colliding) the product with the ice.
  • the ice slurry manufacturing apparatus 11 can be installed not only in environments where large spaces can be easily secured, such as factories of frozen goods sellers and food markets, but also in restaurants and shops in urban areas. becomes.
  • the refrigerator 14 for the ice slurry production device 11, general items can be adopted as the refrigerator 14, the refrigerant introduction pipe 18a, the refrigerant discharge pipe 18b, the aqueous solution pump 13, the nozzle portion 41, the frame portion 17, and the like.
  • the ice slurry manufacturing apparatus 11 can be easily miniaturized, it is possible to select and employ a small and inexpensive apparatus such as the refrigerator 14 described above. Therefore, the ice slurry manufacturing device 11 can be manufactured at a lower cost than a conventional large-sized device. As a result, the refrigeration system 10 and the ice slurry manufacturing apparatus 11 can be easily spread to restaurants and the like in terms of price.
  • the aqueous solution pump 13, the nozzle portion 41, and the like constitute a water flow generating mechanism that generates a water flow inside the freezing tank 12, as described above.
  • the structure in which the aqueous solution pump 13 and the water flow generating mechanism such as the nozzle portion 41 are integrally assembled and fixed to the frame portion 17 has been described above.
  • the freezing tank 12 instead of the aqueous solution pump 13 and the nozzle portion 41, or in combination with the aqueous solution pump 13 and the nozzle portion 41, it is possible to provide the freezing tank 12 with a water flow generating mechanism.
  • An embodiment in which the freezing tank 12 is provided with a water flow generating mechanism will be described below.
  • the same reference numerals are assigned to the same parts as those of the refrigeration system 10 shown in FIG. 1, and the description thereof will be omitted as appropriate.
  • FIGS. 5(a) and 5(b) schematically show a freezing tank (hereinafter denoted by reference numeral 52) to which a water flow generating mechanism is added.
  • 5(a) schematically shows the freezing tank 52 from above
  • FIG. 5(b) schematically shows the freezing tank 52 longitudinally from the side.
  • a water flow is generated in the freezing tank 52 that circulates counterclockwise in the drawing.
  • This water flow is formed using screw portions 43 respectively arranged on wall portions 52 a and 52 b located at the ends of the freezing tank 52 in the longitudinal direction.
  • the screw portions 43 are arranged opposite to each other at positions shifted in the horizontal direction (here, the depth direction of the freezing tank 52). Further, the screw portions 43 are arranged at substantially the same height as shown in FIG. 5(b).
  • the screw portion 43 rotates in the aqueous solution Ws, a reverse water flow is generated and circulates between the wall portions 52 a and 52 b located at the ends of the freezing tank 52 in the longitudinal direction. Further, since the planar shape of the freezing tank 52 is rectangular (rectangular), the aqueous solution Ws circulates in a substantially racetrack shape (also referred to as an oval shape) when viewed from above as shown in FIG. 5(a). do.
  • reference numeral 48 in FIGS. 5(a) and 5(b) are three items to be frozen immersed in the aqueous solution Ws.
  • the frozen product 48 include various foods that require rapid freezing.
  • the frozen product 48 is also schematically shown by a rectangular figure.
  • three items 48 to be frozen are housed in, for example, one basket (metal wire basket in this case) 45 or the like shown in FIG. can be immersed in
  • FIG. (a) As shown in FIGS. 5(a) and 5(b), as shown in FIG. (a) is located in the upper right corner).
  • the products 48 to be frozen are immersed in the freezing tank 52 so as to line up in a line in the length direction of the freezing tank 52 (longitudinal direction corresponding to the left-right direction in FIG. 5(a)).
  • one of the items to be frozen 48 faces the disk portion 26 in the width direction of the freezing tank 52 (the lateral direction corresponding to the vertical direction in FIG. 5(a)).
  • the disk portion 26 and the frozen product 48 are positioned at substantially the same height as the screw portion 43 (here, the rotation axis of the screw portion 43).
  • the circulating aqueous solution Ws flows while hitting the disk portion 26 and the frozen product 48 .
  • the size (length ⁇ depth ⁇ height) of the freezing tank 52 can be approximately the same as that of the freezing tank 12 in the example shown in FIG. .
  • the disk portion 26 is positioned behind one frozen product 48 positioned on the right end of the drawing.
  • the three items 48 to be frozen are not limited to being stored in one basket 45 (not shown). It is also possible to immerse the basket 45 in the freezing tank 52 . In this case, it is also possible to understand the invention according to the present embodiment by replacing the frozen goods 48 in FIGS. 5(a) and (b) with respective baskets 45.
  • the water flow in the freezing tank 52 is a horizontal flow that circulates in the horizontal direction.
  • a partition plate 53 is arranged between the three items 48 to be frozen and the disk portion 26, and the shape (planar shape) of the four corners of the freezing tank 52 is R ( arc) is formed to form an arc.
  • the water flow in the freezing tank 52 is smoothly guided by the R shape at the corners of the freezing tank 52 and the partition plate 53 and horizontally circulates in the freezing tank 52 .
  • FIG. 5B illustration of the partition plate 53 is omitted.
  • FIGS. 6(a) and 6(b) schematically show a freezing tank 54 according to another embodiment.
  • 6(a) schematically shows the freezing tank 54 from above
  • FIG. 6(b) schematically shows the freezing tank 54 longitudinally from the side.
  • parts similar to those in the examples shown in FIGS. 5(a) and 5(b) are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
  • the screw portions 43 are arranged on the wall portions 54a and 54b located at the ends of the freezing tank 54 in the longitudinal direction, respectively.
  • the disk portion 26 is arranged at one corner (lower left corner in FIG. 6(a)) of the freezing tank 54, and the frozen product 48 is positioned between the disk portion 26 and the disk portion 26. They are immersed in a freezing tank 54 so as to be positioned substantially on the same straight line.
  • the disk portion 26 and the frozen product 48 are positioned at substantially the same height as the screw portion 43 (here, the rotation axis of the screw portion 43).
  • the circulating aqueous solution Ws flows while hitting the disk portion 26 and the frozen product 48 .
  • the dimension in the width direction of the freezing tank 54 is smaller than that of the freezing tank 52 in the examples shown in FIGS. 5(a) and (b). That is, since the products to be frozen 48 are arranged so as to be positioned substantially on the same straight line as the disk portion 26, the depth of the freezing tank 54 is smaller than that of the freezing tank 52 in the examples of FIGS. 5(a) and (b). is set.
  • the water flow in the freezing tank 54 is a horizontal flow that circulates in the horizontal direction, similar to the examples shown in FIGS. 5(a) and (b).
  • a partition plate 55 is arranged between the three frozen products 48 and the disk portion 26 and the opposing wall portion 54c, and the shape of the four corners of the freezing tank 54 ( Planar shape) has an arc shape formed with an R (R).
  • R the shape of the four corners of the freezing tank 54
  • the water flow in the freezer tank 54 is smoothly guided by the R shape at the corners of the freezer tank 54 and the partition plate 55 to horizontally circulate inside the freezer tank 54 .
  • FIG. 6B illustration of the partition plate 55 is omitted.
  • the refrigerating tank 54 can be made smaller (thin depth), and the refrigerating system can be further miniaturized. become able to.
  • FIGS. 7(a) and 7(b) schematically show a freezing tank 56 according to another embodiment.
  • 7A schematically shows the freezing tank 56 from above
  • FIG. 7B schematically shows the freezing tank 56 longitudinally from the side.
  • parts similar to those in the examples shown in FIGS. 4A and 4B are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
  • the screw portions 43 are arranged on the wall portions 56a and 56b located at the ends of the freezing chamber 56 in the longitudinal direction, respectively.
  • the disk portion 26 is arranged at one corner (lower left corner in FIG. 7(a)) of the freezing tank 56, and the frozen product 48 is positioned between the disk portion 26 and the disk portion 26. They are immersed in a freezing tank 56 so as to be positioned substantially on the same straight line.
  • the screw portions 43 are arranged at the ends in the longitudinal direction (longitudinal direction) of the freezing tank 56 and positioned substantially on the same straight line.
  • the screw part 43 is mutually arrange
  • the water flow in the freezing tank 56 is a longitudinal flow that circulates in the vertical direction.
  • the corner shape (side surface shape) of the bottom of the freezing tank 56 is rounded to form an arc.
  • the water flow in the freezing tank 56 is smoothly guided by the rounded corners of the freezing tank 56 and circulates vertically in the freezing tank 56 .
  • the aqueous solution Ws can be circulated in the vertical direction (height direction), realizing a vertical aqueous solution circulation system. can. Further, it becomes possible to efficiently freeze the frozen product 48 having a higher height.
  • each of the freezing tanks 12, 52, 54, and 56 described above is provided with a water supply port through which the aqueous solution Ws is supplied. may be supplied with the aqueous solution Ws.
  • tap water is supplied to each of the freezing tanks 12, 52, 54, and 56 from the water supply port, and salt or the like is mixed with the tap water to prepare the aqueous solution Ws in each of the freezing tanks 12, 52, 54, and 56. is also possible.
  • a faucet having a valve (flow control valve) at the water supply port.
  • FIGS. 5 to 7 show the freezing tanks 52, 54, and 56 equipped with the water flow generating mechanism, but unlike the example shown in FIG. If the water flow generating mechanism provided with 13 and the nozzle part 41 gives a flow to the aqueous solution, there is no need to apply processing for providing the water flow generating mechanism to the freezing tank, and a general-purpose heat-insulated water tank can be used as the freezing tank. low cost.
  • the aqueous solution Ws can be easily circulated.
  • the aqueous solution Ws can be more easily circulated.
  • the refrigeration system 10 has been described as being configured by combining the ice slurry manufacturing device 11, the freezing tank 12, the aqueous solution pump 13, the nozzle part 41, and the like. , the aqueous solution pump 13, the nozzle portion 41, and the like.
  • the refrigeration system and the ice slurry production device can be of the type shown in FIGS. 8 to 10 or of the type shown in FIG.
  • Other types of refrigeration systems and ice slurry producing apparatuses will be described below with reference to FIGS. 8 to 10 and 11.
  • FIG. The description of the same parts as those of the refrigeration system 10 and the ice slurry manufacturing apparatus 11 of the type shown in FIG. 1 will be omitted as appropriate. Also, parts similar to those of the refrigeration system 10 and the ice slurry manufacturing apparatus 11 of the type shown in FIG.
  • the ice slurry production tank 113 is formed in a cylindrical shape as shown in FIGS. 8 and 9, and stores therein an aqueous solution (reference numerals omitted) that will be the undiluted solution (also called brine) of the ice slurry.
  • the ice slurry production device 111 and a water flow generation mechanism (propulsion mechanism) 142 as a flow forming part are mounted on the side surface of the ice slurry production tank 113 so that the aqueous solution does not leak.
  • the water flow generating mechanism 142 has the screw portion 43 .
  • the screw part 43 is arranged inside the ice slurry production tank 113 and is driven to rotate around the axis by a rotary drive part 144 arranged outside the ice slurry production tank 113 .
  • the water flow generating mechanism 142 is oriented obliquely with respect to the ice slurry manufacturing tank 113, and the ice flows at a vertical angle indicated by symbol ⁇ 1 in FIG. 8 and a horizontal direction angle indicated by symbol ⁇ 2 in FIG. It is fixed to the slurry production tank 113 .
  • the screw portion 43 is directed toward an ice slurry manufacturing device 111 (described later), and rotates to generate a flow of aqueous solution (water flow) in the ice slurry manufacturing tank 113 .
  • the ice slurry manufacturing apparatus 111 includes a cooling section 121, a rotation driving section 122, a sweeping section 123 as an ice separating section, and the like.
  • the cooling section 121 and the sweeping section 123 are arranged inside the ice slurry manufacturing tank 113 .
  • the rotation drive unit 122 is arranged outside the ice slurry manufacturing tank 113 .
  • the cooling section 121 includes a disk section 126 and refrigerant pipes 128 .
  • Refrigerant pipe 128 is connected to a refrigerator (not shown) so that a refrigerant supplied from the refrigerator flows.
  • various general ones can be adopted.
  • the disk part 126 is fixed inside the ice slurry manufacturing tank 113 via a stay 141 .
  • the stay 141 is fixed to a hatch portion 143 detachably attached to the ice slurry manufacturing tank 113 .
  • the disc portion 126 is supported by a stay 141 at a position away from the inner peripheral surface of the hatch portion 143 .
  • the hatch portion 143 constitutes a part of the ice slurry manufacturing tank 113, is sealed so as not to leak the aqueous solution, and is attached to the ice slurry manufacturing tank 113. It is Furthermore, although illustration is omitted, the hatch portion 143 is attached to the ice slurry manufacturing tank 113 via a lock mechanism. Refrigerant pipe 128 is also sealed so as not to leak the aqueous solution, and penetrates hatch portion 143 . Further, in the ice slurry manufacturing apparatus 111, the cooling section 121, the rotation driving section 122, and the sweeping section 123 constitute an ice making section.
  • the rotary drive part 122 is fixed to the outer peripheral side of the hatch part 143, as shown in FIG. Further, a motor (buff drive motor) is incorporated in the rotary drive unit 122, and a rotating shaft 145 of the motor is sealed to prevent leakage of the aqueous solution and passes through the hatch portion 143. As shown in FIG.
  • the rotation drive unit 122 can continuously rotate the sweeping unit 123 in the aqueous solution stored in the ice slurry manufacturing tank 113 .
  • the rotation drive unit 122 can be a unit (geared motor) that integrally includes a motor and a deceleration unit (gear unit).
  • the sweeping unit 123 has a buff 133 fixed to the rotating shaft 145 of the rotary drive unit 122 .
  • the same material as the buff 33 of the ice slurry production apparatus 11 shown in FIG. 1 can be adopted.
  • the shape of the buff 133 it is possible to adopt the same shape as the buff 33 of the ice slurry manufacturing apparatus 11 shown in FIG. 1 (such as a blade shape).
  • the ice exposed and adhered in this way is swept from the disc portion 126 as indicated by the arrow A6 in FIG. taken and separated. Since the disk portion 126 is rotating, the buff 133 will pass through a fixed place intermittently, and the ice will be separated from the disk portion 126 before it grows large.
  • the ice separated from each of the plate surfaces 126a and 126b of the disk portion 126 becomes ice flakes, and these ice flakes are caught in the flow of the aqueous solution and blown off, mixed with the aqueous solution to form ice slurry.
  • the amount of flake ice in the aqueous solution gradually increases, and the inside of the ice slurry manufacturing tank 113 reaches a predetermined temperature ( For example, about -21°C) ice slurry is stored.
  • the ice slurry production tank 113 is connected to a refrigeration system in which the products to be frozen are immersed via an ice slurry supply pipe and an ice slurry return pipe. Slurry can be supplied and recovered.
  • the ice slurry supply pipe, the ice slurry return pipe, the refrigerating device, and the devices incidental thereto include the ice slurry supply pipe (45) and the ice slurry in Patent Document 1 (Japanese Patent Application Laid-Open No. 2019-207046) mentioned above.
  • a return pipe (46), a refrigerator (6), and equipment similar to these can be employed.
  • the refrigeration system 110 and the ice slurry production device 111 it is possible to produce ice slurry with the small and simple ice slurry production device 111.
  • the ice slurry manufacturing apparatus 111 is provided in the detachable hatch portion 143, the aqueous solution is reduced to such an extent that the liquid level reaches a position lower than the hatch portion 143, and the hatch portion 143 is made of ice. By removing it from the slurry manufacturing tank 113, the ice slurry manufacturing device 111 can be easily cleaned and maintained.
  • a plurality of (for example, two or three) disk portions 126 may be arranged in parallel (coaxially), buffs facing each disk portion 126 may be provided, and these buffs may be rotated. . By doing so, it is possible to produce a large amount of ice slurry in a shorter time.
  • FIG. 12 shows an example in which two disk portions 126 are arranged in parallel (coaxially). Also, in FIG. 12, in order to avoid complication of the illustration, the refrigerant pipe etc. connected to the disk portion 126 arranged inside (the upper stage in FIG. 12, the stage near the center of the ice slurry manufacturing tank 113) are shown. are omitted.
  • the cooling unit 121 and the like are placed on the water surface of the aqueous solution Ws, and the aqueous solution Ws pumped up by a pump (aqueous solution pump) 151 is supplied to each ice making surface (plate surface 126a, 126b) of the disk unit 126 at a sufficient flow rate. It may be supplied continuously from the pipe section 152 . In this case, if the aqueous solution is continuously supplied to the ice making surfaces (plate surfaces 126a and 126b) at a sufficient (appropriate) flow rate, the disk portion 126 can be placed (immersed) in the aqueous solution Ws. are substantially the same.
  • the supply pipe portion 152 is fixed to the ice slurry manufacturing tank 113 at an angle in the vertical direction indicated by symbol ⁇ 3 in FIG. 13 and at a horizontal angle indicated by symbol ⁇ 4 in FIG.
  • the refrigeration system 110 shown in FIGS. 8 and 9 has been described as being configured by combining the ice slurry production device 111, the water flow generation mechanism 142, etc., but the "ice slurry production device" It is also possible to include the device 111, the water flow generating mechanism 142, and the like.
  • An ice slurry manufacturing device 161 of a refrigeration system 160 shown in FIG. 11 includes a cooling section 121, a rotation driving section 122, and a sweeping section 123 similar to the examples of FIGS. However, in the ice slurry manufacturing apparatus 161 shown in FIG.
  • the case 162 has external dimensions somewhat larger than the sweeping part 123, and forms a space part 163 around the sweeping part 123 for circulating the aqueous solution. Further, an aqueous solution inlet 164 and an aqueous solution outlet 165 are formed in the case 162 .
  • the aqueous solution inlet 164 is connected to a brine tank (aqueous solution tank) 168 via an aqueous solution pump 166 and a flow control valve 167 .
  • aqueous solution pump 166 By opening the flow control valve 167 and operating the aqueous solution pump 166 , the aqueous solution in the aqueous solution tank 168 is continuously supplied into the case 162 .
  • the aqueous solution pump 166 functions as a water flow generating mechanism (propulsion mechanism) as a flow forming section.
  • the aqueous solution outlet 165 of the case 162 is connected to the ice slurry tank 173 .
  • a temperature sensor 171 and an IPF (ice concentration) sensor 172 are installed in the pipe between the aqueous solution outlet 165 and the ice slurry tank 173 .
  • the periphery of the disk portion 126 is cooled in the aqueous solution by the cold heat of the refrigerant from the refrigerator (not shown).
  • the aqueous solution flowing through is cooled by the disk portion 126 . 11, the buff 133 of the sweeper 123 continuously rotates, and the ice exposed and adhering to the disk portion 126 collides with the ice adhering to the disk portion 126. separated by sweeping from the
  • the ice separated from the disk portion 126 becomes flake ice, and these flake ice are caught in the flow of the aqueous solution, blown away, mixed with the aqueous solution, and discharged from the case 162 . Then, the aqueous solution mixed with the flake ice is sequentially delivered to the ice slurry tank 173 and stored in the ice slurry tank 173 .
  • the temperature of the ice slurry sent out from the ice slurry manufacturing device 161 is monitored using the temperature sensor 171 . Then, the temperature of the disk portion 126 is adjusted so that the temperature of the ice slurry reaches a predetermined temperature (for example, about -21°C). Also, the ice concentration in the ice slurry pipeline is monitored using the IPF sensor 172, and the flow control valve 167 is adjusted so that the ice concentration is maintained at a predetermined value.
  • a predetermined temperature for example, about -21°C
  • the above-described temperature management and ice concentration management may be performed manually by an operator while visually checking the output of the temperature sensor 171 and the IPF sensor 172, or the output of the temperature sensor 171 and the IPF sensor 172 may be Automatic control using a signal may be performed.
  • the recessed portion of the space 163 of the case 162 is filled with a filling material 169 so that the aqueous solution or ice slurry flows smoothly in the recessed portion.
  • a filling material 169 a synthetic resin or the like can be used as a material of the filler 169.
  • the filler 169 is hatched to indicate a cross section, but the hatching of the case 162 is omitted so as not to complicate the drawing.
  • FIG. 15A a plurality of (for example, three) disk portions 126 are arranged in parallel (coaxially), and a buff 133 facing each disk portion 126 is provided, A partition plate 154 may be provided so that these buffs are rotated and the aqueous solution flows equally to the three disk portions 126 in parallel.
  • the arrow E in FIG. 15(a) indicates the flow of the aqueous solution.
  • the partition plate 154 is drawn to have a triangular cross section, and divides the aqueous solution flowing from the aqueous solution inlet 164 into two directions.
  • a plurality of (for example, three) disk portions 126 are similarly arranged in parallel (coaxially), and a buff 133 facing each of the disk portions 126 is provided.
  • the buff is rotated so that the aqueous solution flows in series while sequentially contacting the three coaxially arranged disc parts 126 (so that the aqueous solution flows in a hook shape twice)
  • Partition plates 156, 157 may be provided.
  • one (front) partition plate 156 guides the aqueous solution flowing from the aqueous solution inlet 164, and the other (backward) partition plate 157 guides the aqueous solution toward the aqueous solution outlet 165.
  • the liquid may flow while sequentially contacting three disc portions 126 arranged in series in the direction of flow.
  • the disk portion 126 By arranging the disk portion 126 as in the examples shown in FIGS. 15(a), (b) and 16, it is possible to produce a large amount of ice slurry in a shorter time. Further, by arranging the disk portion 126 as in the examples shown in FIGS. 15A and 15B, the installation area (projected area) of the disk portion 126 and the like can be suppressed and the disk portion 126 and the like can be arranged. It becomes possible. Further, by arranging the disk portion 126 as in the example shown in FIG. 16, it is possible to simplify the path of the water flow.
  • the temperature control and ice concentration control performed in the refrigeration system 160 of FIG. 11 can also be appropriately adopted in the refrigeration system 10 of FIG. 1 and the refrigeration systems of FIGS. 8 to 10, 13 and 14. is possible. Further, the corners of the case 162 in the ice slurry manufacturing apparatus 161 of FIG. 11 can be formed in an R (rounded) shape to smoothly guide the water flow. This is the same for the ice slurry producing apparatuses of the types shown in FIGS. 15(a), (b) and 16.
  • the disk portion 126 of the cooling portion 121 is arranged inside the hatch portion 143, and the refrigerant pipe 128 passes through the hatch portion 143.
  • the disk portion 186 of the ice slurry manufacturing apparatus 181 enters the opening 193a formed in the hatch portion 193, protrudes somewhat inside the hatch portion 193, and closes the opening portion 193a. I'm in.
  • An outer surface 186b of the disk portion 186 is exposed to the outside of the ice slurry manufacturing tank 113 through the opening 193a.
  • the periphery of the disk portion 186 is liquid-tightly sealed so that the aqueous solution does not leak.
  • means for sealing general means such as application of a sealing material and welding can be employed.
  • the periphery of the disk portion 186 is closed with a sealing material 194, as partially shown. Only the inner side surface 186 a of the disk portion 186 is in contact with the aqueous solution in the ice slurry manufacturing tank 113 .
  • the refrigerant pipe 188 is led out from the outer surface 186b of the disk portion 186 to the outside of the ice slurry manufacturing tank 113.
  • the rotary drive portion 122 is arranged outside the disk portion 186 .
  • the rotary shaft 145 of the rotary drive unit 122 is sealed to prevent leakage of the aqueous solution and penetrates the disc portion 186 in the horizontal direction.
  • the rotation drive unit 122 can continuously rotate the sweeping unit 123 in the aqueous solution stored in the ice slurry manufacturing tank 113 .
  • the sweeping part 123 has a buff 133 inside the disk part 186 .
  • the buff 133 is fixed to the rotating shaft 145 of the rotary drive unit 122 and collides with the ice adhering to the inner surface 186a of the disk portion 186 with which the aqueous solution is in contact, thereby separating the ice from the disk portion 186.
  • the refrigerant pipe 188 does not come into direct contact with the aqueous solution, and ice adhesion to the refrigerant pipe 188 can be prevented.
  • the disk part 126 of the cooling part 121 is housed inside the case 162, and the refrigerant pipe 128 passes through the case 162.
  • the end portion 207 of the disk portion 206 in the ice slurry manufacturing apparatus 201 protrudes from the case 212, and the refrigerant pipe 218 is led out from the end portion 207 of the disk portion 196. ing.
  • a plurality of salt water inlet pipes (aqueous solution inlet pipes) 219a and a plurality of salt water outlet pipes (aqueous solution outlet pipes) 219b are connected to the case 212, and salt water is supplied through the salt water inlet pipes 219a. It is introduced into the space 163 inside the case 212 .
  • the salt water (aqueous solution) introduced into the space 163 in the case 212 contacts the plate surfaces 206 a and 206 b of the disk portion 206 and is cooled by the disk portion 206 .
  • the ice exposed and adhering to the plate surfaces 206 a and 206 b of the disc portion 206 is swept and separated from the disc portion 206 by the rotating buff 133 .
  • the ice separated from the disk portion 206 becomes ice flakes, which are mixed with the salt water and discharged from the case 212 through the salt water outlet pipe 219b.
  • the rotary drive unit 122 that rotates the buff 133 is arranged above the case 212 , and the rotating shaft 145 of the rotary drive unit 122 is inserted downward into the case 212 .
  • a space between the rotary shaft 145 and the case 212 is sealed so that salt water does not leak.
  • the refrigerant pipe 218 does not come into direct contact with salt water, and ice adhesion to the refrigerant pipe 218 can be prevented. Further, in the example of FIG. 18, since the rotating shaft 145 of the rotary drive unit 122 is inserted downward into the case 212, a hole (reference numeral omitted) of the case 212 through which the rotating shaft 145 is passed opens upward. As a result, leakage of salt water from the case 212 is less likely to occur.
  • FIG. 19(a) to (d) show a flake ice making apparatus 2010 according to an embodiment of the second disclosed aspect.
  • FIG. 19(a) is a side view of the ice flake manufacturing apparatus 2010,
  • (b) is a front view
  • (c) is a plan view
  • (d) is a cross-sectional view taken along line BB in (c).
  • FIG. 20 shows the sprinkler nozzle section 2018 provided in the flake ice making apparatus 2010, and
  • FIG. 21 is a cross-sectional view taken along line AA in FIG. 19(c).
  • FIG. 20 were created using the design drawings (assembly drawings) of the ice flake manufacturing device 2010 and the water nozzle section 2018.
  • the configuration and lines are omitted as appropriate, hidden lines (dashed lines), virtual lines (double-dotted lines), and central lines (one-dotted dashed lines) etc. are being used.
  • a flake ice making apparatus 2010 includes a rectangular parallelepiped housing 2012, a geared motor (hereinafter referred to as "motor") 2014, a drive shaft 2016 (illustrated in FIG. 19(d)), two sets of water nozzles 2018, a metal plate (metal body) 2020, two sets of scraping teeth 2022 (illustrated in FIG. 21), and the like.
  • motor a geared motor
  • the motor 2014 is arranged outside the housing 2012, and the motor 2014 incorporates a driving force transmission gear (not shown).
  • a drive shaft 2016 is connected to the motor 2014 , and the drive shaft 2016 is inserted into the housing 2012 substantially horizontally.
  • each water nozzle section 2018 has a main pipe 2024 that penetrates the housing 2012 in the horizontal direction. As shown in FIG. 20, each watering nozzle section 2018 has two pairs of short pipes 2026 and long pipes 2028 extending downward from the main pipe 2024 .
  • aqueous solution containing a solute (also referred to as brine, which will be described later) is supplied to each watering nozzle 2018 as indicated by an arrow A1 in FIGS. 19(b) and 19(c).
  • Tip nozzle portions 2030 and 2032 are provided at the tip portions of the short tube 2026 and the long tube 2028 .
  • brine is sprayed in the form of mist toward each plate surface of metal plate 2020 arranged in the interior of housing 2012 in an upright posture.
  • reference numerals 2033 and 2034 in FIG. 20 denote imaginary brine sprayed from the tip nozzle portions 2030 and 2032 onto one surface of the metal plate 2020 .
  • the remaining brine is recovered as indicated by arrow A2 in Figures 19(b) and (c).
  • the supply (and recovery) of brine to each watering nozzle 2018 is performed using a brine tank that stores brine, a brine pump that imparts fluidity to brine, and the like.
  • the brine tank and brine pump are installed outside the ice flake manufacturing apparatus 2010 and connected to the ice flake manufacturing apparatus 2010 via brine pipes (not shown) and valve devices. Brine suitable for the flake ice making apparatus 2010 of this embodiment will be described later.
  • the metal plate 2020 is of a plate type, and is shaped like a rectangular flat plate as indicated by the imaginary line (chain line) in FIG. 19(d) and the solid line (chain line) in FIG. formed.
  • the metal plate 2020 has parallel front and back surfaces serving as ice making surfaces.
  • One watering nozzle portion 2018 is provided for each plate surface of the metal plate 2020 . In the vicinity of each plate surface of the metal plate 2020, two sets of (four) tip nozzle portions 2030 and 2032 of the water nozzle portion 2018 described above are positioned.
  • the metal plate 2020 As the member (material) that constitutes the metal plate 2020, copper or a copper alloy with high thermal conductivity is adopted.
  • the metal plate 2020 is formed by casting and has a thickness of, for example, about 30 mm.
  • the surface of the metal plate 2020 is plated with a wear-resistant metal (for example, chromium).
  • the shape of the metal plate 2020 is not limited to a polygon such as a rectangle, and may be, for example, a disc shape. Also, as the material of the metal plate 2020, aluminum, iron, stainless steel, or the like can be used.
  • the metal plate 2020 includes a straight refrigerant pipe 2036, a crank-shaped refrigerant pipe 2038, and a U-shaped refrigerant pipe (hereinafter referred to as "U-shaped pipe ) 2040 is connected. Inside the metal plate 2020, as schematically shown in FIG. The connection structure of 2036, 2038 and 2040 to metal plate 2020 will be described later.
  • these refrigerant pipes 2036, 2038, 2040 and the refrigerant flow path 2042 form two systems of refrigerant guide paths.
  • a straight refrigerant pipe 2036 and a crank-shaped refrigerant pipe 2038 are used one by one for each system, and constitute an introduction portion and an outlet portion of the refrigerant guide path.
  • These refrigerant pipes 2036 and 2038 introduce the refrigerant supplied from the outside of the housing 2012 as indicated by arrows B1 and C1 in FIG. , C2.
  • the metal plate 2020 and the refrigerant pipes 2036, 2038, 2040 constitute an ice maker 2044.
  • the ice maker 2044 is connected to a compressor (freezer) and various valve devices via refrigerant pipes (not shown).
  • both surfaces of the metal plate 2020 are cooled.
  • the evaporation temperature of the refrigerant is, for example, -60°C.
  • a circular through hole (reference numerals omitted) is formed in the center of the metal plate 2020, and the drive shaft 2016 passes through this through hole.
  • Two arms 2046 are attached to the drive shaft 2016 as shown in FIG. Arms 2046 are propeller-shaped on drive shaft 2016 at 180 degree intervals and project generally radially of drive shaft 2016 in a generally aligned relationship with one another.
  • a scraper tooth 2022 is attached to the arm 2046, and the scraper tooth 2022 is arranged in a propeller shape with the drive shaft 2016 as the center.
  • the shaving tooth 2022 faces the plate surface of the metal plate 2020 with its cutting edge facing.
  • the distance between each plate surface of the metal plate 2020 and the cutting edge of the scraping tooth 2022 is about 1 mm or less (for example, 0.2 mm) over almost the entire length of the scraping tooth 2022 .
  • Two such pairs of arms 2046 and scraping teeth 2022 are provided for each plate surface of the metal plate 2020 .
  • the drive shaft 2016 rotates, and the cutting tooth 2022 rotates together with the arm 2046 while facing the plate surface of the metal plate 2020 in parallel with the cutting edge.
  • the state in which the arm 2046 (and the scraping tooth 2022) is in a horizontal posture is indicated by a solid line
  • the state in which it is in a vertical posture is indicated by a two-dot chain line.
  • the shaving tooth 2022 is displaced while contacting the ice, and scrapes the ice off the metal plate 2020 .
  • the scraped ice becomes flake ice and is stored in a flake ice storage tank (not shown) installed at the bottom of the housing 2012 .
  • the shaving tooth 2022 and the arm 2046 constitute a sweeper that displaces relative to the metal plate 2020 to separate ice formed on the metal plate 2020 from the metal plate 2020 .
  • the mode of rotation of the shaving tooth 2022 may be one that continues at an angle exceeding 360 degrees (continuous rotation), or one that stops for a predetermined time at each predetermined angle within 360 degrees (intermittent rotation). good too.
  • the generated ice is ice that has been solidified so that the concentration of the solute contained in the brine is substantially uniform, and that satisfies at least the following conditions (a) and (b). is.
  • the temperature at the completion of melting is less than 0°C.
  • the rate of change in the solute concentration of the aqueous solution (brine) in which the ice is melted during the melting process is within 30%.
  • Brine means an aqueous solution with a low freezing point containing one or more solutes.
  • Specific examples of brine include sodium chloride aqueous solution (salt water), calcium chloride aqueous solution, magnesium chloride aqueous solution, ethylene glycol aqueous solution, ethanol aqueous solution, and the like.
  • the thermal conductivity of brine (salt water) with salt as the solute is about 0.58 W/mK, but the thermal conductivity of frozen flake ice with brine with salt as the solute is about 2.2 W/mK. That is, the thermal conductivity is higher in flake ice (solid) than in brine (liquid). For this reason, flake ice (solid) can cool the article to be cooled more quickly.
  • the freezing point of a sodium chloride aqueous solution is -21°C
  • the freezing point of a magnesium chloride aqueous solution is -26.7°C. Therefore, when aqueous solutions such as these are used as brine, when the brine adheres to the metal plate 2020 , it is rapidly frozen and a film of ice (hybrid ice) is produced on the surface of the metal plate 2020 .
  • FIG. 22 schematically shows the structure of the ice maker 2044. As shown in FIG. A large number of coolant channels 2042 are formed in the metal plate 2020 . Only six coolant flow paths 2042 are schematically shown in FIG.
  • the coolant channel 2042 is a straight hole formed inside the metal plate 2020 .
  • the coolant flow path 2042 is a hole with a perfect circular cross section, and opens in a perfect circle at the end surfaces 2048 and 2049 of the metal plate 2020 .
  • the diameter (inner diameter) of the coolant channel 2042 is substantially constant over the length direction, and the size of the diameter is, for example, about 10 mm.
  • coolant channels 2042 extend inside the metal plate 2020 parallel to the plate surfaces 2050 and 2051 of the metal plate 2020 and parallel to each other.
  • the coolant passages 2042 are opened in two rows at the end faces 2048 and 2049 of the metal plate 2020 in an oblique positional relationship.
  • FIG. 22 shows a state in which the straight refrigerant pipe 2036 and the crank-shaped refrigerant pipe 2038 are both cut short, leaving only straight portions of the refrigerant pipes 2036 and 2038 .
  • a straight refrigerant pipe 2036 and a crank-shaped refrigerant pipe 2038 are joined to a common end face (end face 2049 here) of the metal plate 2020 .
  • the opening of the coolant channel 2042 between the two coolant pipes 2036 and 2038 and the opening of the coolant channel 2042 on the opposite end surface 2048 are spatially connected by a U-shaped coolant pipe 2040 .
  • the U-shaped refrigerant pipe 2040 is also joined to the metal plate 2020 by means such as brazing.
  • the coolant flow path 2042 and the coolant pipes 2036, 2038, and 2040 form a meandering coolant guide path through which the coolant flows.
  • FIG. 22 schematically shows the ice maker 2044 as described above, and illustration of the through hole through which the drive shaft 2016 passes is omitted.
  • each coolant flow path 2042 As schematically shown in FIG. 23, on the inner peripheral surface (flow path surface) of each coolant flow path 2042, a large number of grooves 2054 that draw continuous straight lines are formed so as to intersect each other. These grooves 2054 form an uneven portion 2052 in which a large number of diamond-shaped patterns are drawn on the inner peripheral surface of the coolant channel 2042 . A part of the coolant (for example, the evaporation temperature of -60° C.) flowing through the coolant channel 2042 collides against the uneven walls and corners due to the uneven portion 2052 . As a result, the flow of the coolant is disturbed and turbulence occurs.
  • the coolant for example, the evaporation temperature of -60° C.
  • the flow of the coolant generated in the coolant channel 2042 is given fluidity by a pump (not shown) and is forced convection.
  • the Reynolds number determines whether the flow is laminar or turbulent.
  • turbulent flow is forcibly generated by the uneven portion 2052 of the coolant channel 2042 .
  • the heat transfer coefficient is improved by the turbulent flow, and the refrigerating capacity can be improved as a whole.
  • the amount of cold heat obtained from the refrigerant is greater when the uneven portion 2052 is provided than when the uneven portion 2052 is not provided, and the ice can be made per unit time. amount can be increased.
  • the refrigerating capacity has been improved by increasing the fluidity of the refrigerant.
  • the coolant channel has a smooth inner peripheral surface, and is configured so that flow resistance in the coolant channel is reduced (pressure loss is decreased) when the coolant gas flows.
  • the refrigerator compressor in this case
  • has a function to stop operation (low-pressure function) may be provided. If the refrigerator has a low pressure cut function, even if the fluidity of the refrigerant is increased in the ice maker 2044, the flow may be too smooth, the load on the refrigerator may decrease, and the low pressure cut of the refrigerator may be performed.
  • the load of the refrigerator can be maintained at a certain level or more. It is possible to prevent the low voltage cut from being performed. Usually, once the low pressure cut of the refrigerator occurs, it takes a long time to recover, and the production of flake ice stops during that time. However, according to the flake ice making apparatus 2010 of the present embodiment, it is possible to prevent such a situation from occurring.
  • the processing of the groove portion 2054 can be performed using, for example, tapping (thread cutting) technology.
  • a hole is drilled (also referred to as “drilling” or “perforating”) in the material that will be the metal plate 2020, and the hole is passed through.
  • a tap is screwed from the end of the hole to form a spiral groove.
  • This groove is formed from both ends of the hole.
  • the spiral grooves intersect to form a continuous diamond-shaped groove portion 2054 as shown in FIG.
  • the surface area of the coolant flow path 2042 is increased, and the contact area between the metal plate 2020 and the coolant is increased. This also increases the amount of cold heat obtained from the refrigerant and increases the amount of ice that can be produced per unit time, compared to the case where the uneven portion 2052 is not provided.
  • the folded portion of the coolant channel 2042 is formed by brazing the U-shaped coolant pipe 2040 to the metal plate 2020, but is not limited to this.
  • a folded portion may be formed as shown in FIG. In FIGS. 24 and 25, two coolant flow paths 2042 are connected via a groove-shaped connection recess 2056.
  • the metal plate 2020 is counter-bored so as to straddle the two coolant flow paths 2042 .
  • Reference numeral 2058 in FIGS. 24 and 25 denotes a recess (counterbore portion) formed by counterbore processing.
  • a bottom surface portion 2057 positioned at the back of the connection recess 2056 is processed into an R shape (also referred to as “curved surface shape” or “arcuate cross section”) that connects the two coolant flow paths 2042 .
  • the surface shape of the wall connecting the two coolant channels 2042 is a smooth surface without corners.
  • a perfectly circular disk-shaped cap 2060 is fitted into the counterbore portion 2058 as indicated by an arrow D, and the cap 2060 is brazed to the metal plate 2020 .
  • the ends of the two coolant flow paths 2042 are closed by the caps 2060, the two coolant flow paths 2042 are continuous via the connection recesses 2056. Therefore, even after the caps 2060 are joined, two The state in which the two coolant channels 2042 are spatially connected is maintained.
  • the connection concave portion 2056 becomes the folded portion of the refrigerant. At this folded portion, since the shape of the rounded bottom portion 2057 is rounded, the circulation resistance (flow resistance) of the refrigerant can be reduced.
  • connecting recesses 2056 and counterbore portions 2058 are formed for other sets of coolant flow paths 2042 , caps 2060 are fitted into the counterbore portions 2058 , and the caps 2060 are joined to the metal plate 2020 . Forming the folded portion in this manner eliminates the need for the U-shaped refrigerant pipe 2040 (FIG. 22).
  • FIG. 26 schematically shows a method of manufacturing a metal plate 2070 according to the second embodiment of the second disclosed aspect.
  • the metal plate 2070 is formed by facing a first plate 2072 and a second plate 2074 and joining them together as indicated by arrow E. As shown in FIG.
  • the first plate 2072 and the second plate 2074 are formed by casting or cutting. Also, the first plate 2072 and the second plate 2074 have the same external dimensions, and each thickness is, for example, about 15 mm.
  • the first plate 2072 and the second plate 2074 are dug with grooves 2076 and 2078 that serve as coolant flow paths.
  • the grooves 2076 and 2078 have a number of linear portions 2080 formed parallel to each other and U-shaped portions 2082 connecting the linear portions 2080 .
  • Both ends of the grooves 2076 and 2078 are opened in a semicircular shape (not shown) at the end faces of the first plate 2072 and the second plate 2074 .
  • the grooves 2076 and 2078 are formed with a mirror surface relationship so as to be line symmetrical with each other, and by overlapping the first plate 2072 and the second plate 2074, one coolant flow path is formed.
  • each ridge portion 2084 is formed in an arc-shaped plate shape. Further, the ridge 2084 is formed integrally with the first plate 2072 and protrudes substantially vertically from the inner peripheral surface (flow path surface) of the groove 2076 by a predetermined amount (for example, about 1 mm).
  • the ridges 2084 are slanted at an inclination angle ⁇ with respect to the extending direction of the grooves 2076 .
  • the ridges 2084 are arranged parallel to each other. These ridges 2084 form irregularities 2088 in the coolant flow path 2086 formed by the grooves 2076 and 2078 .
  • a metal plate is formed by joining a half-split first plate 2072 having grooves 2076 and 2078 and a second plate 2074, without drilling the metal plate.
  • the coolant channel 2086 can be formed without using the U-shaped coolant pipe 2040 .
  • the uneven portion 2088 with the ridge portion 2084, turbulence can be generated in the coolant flow path 2086.
  • the heat transfer coefficient of the metal plate can be increased, and the refrigerating capacity can be improved.
  • the uneven portion 2088 the surface area of the coolant channel 42 is increased, and the contact area between the metal plate 2070 and the coolant is increased.
  • the ridges 2084 are obliquely provided at an inclination angle ⁇ with respect to the direction in which the grooves 2076 extend, when the ridges 2084 are directed perpendicularly to the coolant flowing through the coolant flow paths 2086, The flow resistance can be reduced compared to (when ⁇ is brought close to 90°). Depending on the setting of the inclination angle ⁇ of the ridges 2084, the flow resistance to the coolant can be adjusted.
  • the flow resistance can be increased by relatively increasing the amount of protrusion of the ridges 2084 within the grooves 2076 . By reducing the protrusion amount of the ridges 2084, the flow resistance can be reduced.
  • the groove 2076 of the first plate 2072 may not be provided with the ridge 2084
  • the groove 2078 of the second plate 74 may be provided with the ridge 2084
  • the ridges 2084 may be formed in both the grooves 2076 of the first plate 2072 and the grooves 2078 of the second plate 2074 .
  • the flow resistance to the coolant can be adjusted by changing various conditions such as the inclination angle ⁇ and the amount of protrusion of the ridges 2084 as well as the number and arrangement (intervals, etc.) of the ridges 2084 .
  • the "ridges" can also be called “fins” or the like.
  • 29 to 31 show a drum (metal body) 2121 provided in a flake ice making apparatus according to the third embodiment of the second disclosed aspect.
  • the drum 2121 is a drum-type metal plate, and includes a vertical cylindrical inner cylinder (inner cylinder portion) 2132 and an outer cylinder (outer cylinder portion) 2132 arranged outside the inner cylinder 2132 so as to surround the inner cylinder 2132 . part) 2133.
  • the inner cylinder 2132 and the outer cylinder 2133 are arranged coaxially.
  • the inner cylinder 2132 is formed using a material such as copper or copper alloy.
  • a spiral coolant channel 2134 is provided between the inner cylinder 2132 and the outer cylinder 2133 .
  • the space between the inner cylinder 2132 and the outer cylinder 2133 is helically formed as a flow path wall (flow path wall portion, also referred to as a "ribbon") 2136 as shown in FIG. It is formed by partitioning by The width of the channel wall 2136 matches the interval between the inner cylinder 2132 and the outer cylinder 2133 .
  • the inner periphery of the channel wall 2136 is joined to the outer surface of the inner cylinder 2132
  • the outer periphery of the channel wall 2136 is joined to the inner surface of the outer cylinder 2133 .
  • An outward flange 2132a is provided at each axial end edge (only one is shown) of the inner cylinder 2132 .
  • the flange 2132 a straddles the inner cylinder 2132 and the outer cylinder 2133 and closes each end of the coolant channel 2134 .
  • Refrigerant is supplied to the refrigerant flow path 2134 via a refrigerator (compressor), a refrigerant pipe, and the like, although illustration is omitted. Then, the inner peripheral surface of the inner cylinder 2132 is frozen by the refrigerant flowing through the refrigerant flow path 2134 .
  • an injection mechanism for spraying brine in a centrifugal direction and a scraper for scraping out the generated hybrid ice there are arranged an injection mechanism for spraying brine in a centrifugal direction and a scraper for scraping out the generated hybrid ice.
  • the injection mechanism section is coaxially arranged inside the drum 2121 and sprays brine onto the inner peripheral surface of the inner cylinder 2132 while rotating around the axis. Since the inner peripheral surface of the inner cylinder 2132 is cooled by the coolant flowing through the coolant flow path 2134, the brine adhering to the inner cylinder 2132 rapidly freezes to form hybrid ice.
  • the hybrid ice produced on the inner peripheral surface of the inner cylinder 2132 is scraped off by the scraper descending inside the inner cylinder 2132 and falls as ice flakes.
  • the fallen ice flakes are stored in a flake ice storage tank (not shown) arranged directly below.
  • the coolant flowing through the coolant channel 2134 of the drum 2121 flows down while swirling because the coolant channel 2134 is spirally formed as described above.
  • One surface (upper surface, flow path surface) 2138 of the flow path wall 2136 is provided with a large number of protrusions 2140 as shown in a partially enlarged view in FIG.
  • the protrusion 2140 protrudes into the coolant channel 2134 by a predetermined amount (for example, about 1 mm).
  • each protrusion 2140 can be adopted as the shape of each protrusion 2140, but in the example of FIG. 31, a conical shape is adopted.
  • Such protrusions 2140 can be formed, for example, by pressing the flow path wall 2136 or the like.
  • the irregularities 2142 are formed and turbulence can be generated in the coolant flow path 2134 .
  • the heat transfer coefficient of the drum 2121 can be increased, and the refrigerating capacity can be improved.
  • the uneven portion 2142 the surface area of the coolant channel 2134 is increased, and the contact area between the drum 2121 and the coolant is increased.
  • metal plates 2020, 2070 or drums 2121 for circulating coolant are provided in the ice slurry raw material manufacturing apparatus, although not shown.
  • the ice slurry raw material manufacturing device is arranged directly above an ice storage tank in which brine is stored, and flake ice scraped from metal plates 2020, 2070 or drum 2121 is dropped into the ice storage tank.
  • the brine is stirred by a stirrer equipped with a propeller blade or the like to mix flake ice with the brine to produce an ice slurry.
  • the aspect of the present disclosure can also be applied to a type of ice slurry production apparatus in which the metal plates 2020 and 2070 and the drum 2121 are arranged in a brine tank in which brine is stored and directly immersed in the brine.
  • a refrigerator is arranged outside the brine tank.
  • the refrigerator and metal plate 2020 (or metal plate 2070 or drum 2121) are supported by a frame straddling one wall of the brine tank.
  • the brine in the brine tank is given fluidity by a pump, a propeller blade, or the like, and flake ice generated and scraped off by the metal plate 2020 (or the metal plate 2070 or the drum 2121) is mixed with the brine.
  • An ice slurry is produced.
  • This type of ice slurry manufacturing apparatus is configured, for example, in the same manner as the first embodiment (FIG. 1) of the first disclosed aspect.
  • a flake ice making apparatus or an ice slurry making apparatus having a metal plate 2020 as shown in FIG. 22 can be called a plate type.
  • a type of metal plate in which coolant passages are formed by drilling can be referred to as a drilling type.
  • the drilling applied to the metal plate 2020 shown in FIG. 22 is not limited to the flat plate-shaped metal bodies illustrated in FIG. It is possible.
  • a metal pipe having a wall thickness of 25 mm, a diameter (outer diameter) of 500 mm, and a length (axial length) of 400 mm is provided with a large number of pipes in the length direction (axial direction). Perforations are made to form coolant channels. Since the length (length in the axial direction) of the metal pipe is 400 mm, the length of the straight coolant channel is 400 mm.
  • a straight or U-shaped refrigerant pipe is joined to the metal body in which the refrigerant flow path is formed to form the refrigerant guide path. In this manner, a drilling-type, drum-type ice maker is formed.
  • the concave-convex portion can be formed by casting, and the formation of the concave-convex portion by casting can be applied to a plate-shaped metal body or a drum-shaped metal body.
  • casting is performed by placing a core, which serves as a coolant flow path, inside a plate-type or drum-type mold.
  • a metal body having uneven portions in the coolant flow path is formed after the material is solidified.
  • each embodiment merely shows an example of implementation for carrying out the second disclosed aspect, and the technical scope of the second disclosed aspect should not be construed to be limited by this. is.
  • the invention may be embodied in various forms without departing from its spirit or essential characteristics.
  • Each technical matter in the second disclosure mode can be applied to the first disclosure mode (FIGS. 1 to 18) as long as there is no problem.
  • FIG. 32 shows a refrigeration system 3010 according to the first embodiment of the third disclosed aspect and an ice slurry production device 3011 used in this refrigeration system 3010.
  • a refrigeration system 3010 shown in FIG. 32 is configured by combining an ice slurry production device 3011, a refrigeration tank 3012, an aqueous solution pump 3013, and the like.
  • the refrigeration system 3010 shown in FIG. 32 is related to the first embodiment of the first disclosure aspect in that the refrigeration capacity is improved by a plurality of refrigerant systems (points corresponding to FIGS. 33 to 35) as will be described later. It differs from refrigeration system 10 (FIG. 1). Many of the technical matters shown in FIGS. 32, 36, and 37 are common to the refrigeration system 10 (FIGS. 1, 3, and 4) according to the first embodiment of the first disclosed aspect.
  • the ice slurry manufacturing apparatus 3011 of the third disclosed aspect includes, for example, raw water (eg, 50% by weight (wt. %) ethanol aqueous solution), and it is possible to create flaky ice (flaky ice).
  • raw water eg, 50% by weight (wt. %) ethanol aqueous solution
  • flaky ice flaky ice
  • the freezing point of ethanol aqueous solution is, for example, about -37°C or -50°C.
  • This ice slurry manufacturing device 3011 has a refrigerator 3014, a flake ice making section 3015 as an ice making section, a refrigerant guide section 3016, and the like. Furthermore, in the ice slurry manufacturing apparatus 3011, the refrigerator 3014, the ice flake making section 3015, and the refrigerant guide section 3016 are mounted on a frame section 3017 as a holding section and integrated with each other.
  • a refrigerator 3014, a flake ice making unit 3015, and a refrigerant guide unit 3016 of the ice slurry manufacturing device 3011 constitute a refrigeration cycle, circulate a predetermined refrigerant liquid (liquid refrigerant), and compress, condense, and expand the refrigerant. , and evaporation.
  • a predetermined refrigerant liquid liquid refrigerant
  • a refrigerant (first refrigerant, which will be described later) is sent from the refrigerator 3014 to the flake ice making section 3015 via the refrigerant guide section 3016 .
  • the refrigerant guide section 3016 includes a refrigerant introduction pipe 3018a that introduces the refrigerant from the refrigerator 3014 to the ice flake preparation section 3015, and a refrigerant outlet pipe 3018b that returns the refrigerant drawn from the ice flake preparation section 3015 to the refrigerator 3014. .
  • refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b for example, a general refrigerant pipe such as a copper pipe covered with a heat insulating material can be adopted. Also, the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b can be configured by connecting such refrigerant pipes via general pipe joints.
  • each end of the refrigerant introduction pipe 3018a and the refrigerant discharge pipe 3018b is connected to the refrigerator 3014 and the flake ice making unit 3015 via pipe joints.
  • the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b have a curved shape that curves upward into an inverted U shape.
  • the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b have similar lengths and sizes.
  • the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b have a freezing tank straddling portion 3019 at the inner portion bent in an inverted U shape.
  • the freezer tank 3012 A part of the wall portion 3012a enters the freezing tank straddling portion 3019 of the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b.
  • the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b for example, a flexible pipe that can be directly bent by hand without using a tool by an operator who assembles the ice slurry manufacturing apparatus 3011 is adopted. is also possible. Also in this case, it is desirable to cover the periphery of the flexible tube with a heat insulating material.
  • the ice slurry manufacturing apparatus 3011 includes a system (a first refrigerant to be described later) for flowing a refrigerant (first refrigerant) by a refrigerator 3014.
  • a system for flowing a different type of refrigerant (second refrigerant) is provided (FIGS. 33 and 34A).
  • the flake ice making unit 3015 includes a cooling unit 3021, a rotation driving unit 3022 as a driving unit, a sweeping unit 3023 as an ice separating unit, and the like.
  • the cooling section 3021 includes a disk section 3026 as an ice making plate and a large number of refrigerant pipes (U-shaped pipes 3028, etc.).
  • the disk portion 3026 is formed of a metal plate having a rectangular (here, square) plate surface (ice making surface) and a predetermined thickness, and is fixed to a frame portion 3017 (described later).
  • the size (dimensions) of the disk portion 3026 can be, for example, an outer shape of about 30 cm square and a plate thickness of about 30 mm.
  • the disk portion 3026 is not limited to a rectangular shape and may be circular.
  • the upper surface (plate surface 3026a) and the lower surface (plate surface 3026b, FIG. 36) of the disk portion 3026 are processed to be substantially flat and parallel to each other.
  • a material for the disk portion 3026 copper or a copper alloy with high thermal conductivity is adopted.
  • disk portion 3026 is formed by casting.
  • the surface of disk portion 3026 is plated with a wear-resistant metal (for example, chromium).
  • a wear-resistant metal for example, chromium
  • the material of the disk portion 3026 in addition to copper and copper alloy, it is also possible to employ aluminum, iron, stainless steel, or the like.
  • coolant holes 3027 are formed inside the disk portion 3026 as indicated by broken lines in FIG. 34(a).
  • the coolant holes 3027 extend linearly in parallel with each other and pass through the disk portion 3026 .
  • the cross-sectional shape of the coolant hole 3027 is a perfect circle. These coolant holes 3027 are formed by drilling the material of the disk portion 3026 .
  • a large number of refrigerant pipes such as U-shaped pipes 3028 are joined to the disk portion 3026, and two refrigerant passages are formed by the refrigerant holes 3027 inside the disk portion 3026, the U-shaped pipes 3028, and the like. ing.
  • one refrigerant passage is referred to as a "first refrigerant passage”, and the “first refrigerant passage” is denoted by reference numeral 3029A.
  • the other refrigerant passage is referred to as a “second refrigerant passage”, and this "second refrigerant passage” is denoted by reference numeral 3029B.
  • the first refrigerant and the second refrigerant meander through the first refrigerant passage 3029A and the second refrigerant passage 3029B, respectively.
  • the first refrigerant refrigerant gas
  • R404A, R447, R448A, etc. having an evaporation temperature of about -60°C to -45°C.
  • the refrigerator 3014 imparts fluidity to the first refrigerant.
  • the refrigerator 3014 functions as fluidity imparting means for the first refrigerant.
  • the second refrigerant unlike the first refrigerant, liquefied natural gas (evaporation temperature is about -162°C) or liquid nitrogen (evaporation temperature is about -196°C), which has a lower evaporation temperature than the first refrigerant. is possible.
  • the second refrigerant is stored in the airtightly formed second refrigerant tank 3020 .
  • the second refrigerant valve 3020a provided in the second refrigerant passage 3029B is opened, the fluidity of the second refrigerant increases due to the pressure of the vaporized second refrigerant in the second refrigerant tank 3020 or in the flow path. Given. In this case, the second refrigerant valve 3020a functions as fluidity imparting means for the second refrigerant.
  • the opening of the second refrigerant valve 3020a can be manually performed, for example, by an operator who manufactures ice slurry.
  • the second refrigerant valve 3020a may be opened by an operator who manufactures ice slurry, for example, by operating a predetermined button.
  • a temperature sensor (not shown) is installed in the freezing tank 3012, and when the temperature sensor detects that the aqueous solution Ws cooled by the first refrigerant has reached a predetermined set temperature, the second refrigerant It is also possible to open the valve 3020a (opening by automatic control).
  • the second refrigerant tank 3020 for example, a container having a vacuum insulation structure (a container with a double structure) can be used.
  • the second refrigerant valve 3020a it is possible to employ various general valve devices that can be used in the flow path of liquefied natural gas, liquid nitrogen, or the like. In this embodiment, the first coolant and the second coolant are switched to supply the coolant to the disk portion 3026, and the method of supplying the coolant will be described later.
  • reference numerals 3018a and 3018b in FIG. 34(a) indicate the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b in the first refrigerant passage 3029A
  • reference numerals 3019a and 3019b indicate the second refrigerant passage 3029B.
  • the second refrigerant passage 3029B is omitted in FIG. 32, and the second refrigerant passage 3029B is shown in FIGS.
  • the direction in which the coolant hole 3027 extends (vertical direction in the figure), the coolant introduction pipe 3018a (and 3019a), the coolant outlet pipe 3018b (and 3019b) extend (horizontal direction in the figure) are orthogonal to each other.
  • the refrigerant pipes such as the U-shaped pipe 3028 are joined to the disk portion 3026, and brazing or the like can be adopted as the joining means.
  • the first refrigerant passage 3029A and the second refrigerant passage 3029B are formed so as to overlap doubly in the thickness direction of the disk portion 3026, as schematically shown in FIG.
  • FIG. 35 shows the first coolant passage 3029A and the second coolant passage 3029B in the disk portion 3026, distinguished by symbols.
  • the first refrigerant passage 3029A is represented by a circular symbol
  • the second refrigerant passage 3029B is represented by a perfect circle crossed with a symbol.
  • the relationship between the coolant holes 3027 in the disk portion 3026 and the coolant introduction pipes 3018a and 3018b connected to the disc portion 3026 is not limited to the example shown in FIG. 34(a).
  • the direction in which the lead-out tube 3018b extends may be the same direction.
  • the heat of the disk portion 3026 is taken away and the disk portion 3026 is cooled.
  • the evaporation temperature of the first refrigerant is about -60°C to -45°C, and the evaporation temperature of the first refrigerant is about -162°C or less.
  • the freezing point of the aqueous solution as brine is about -38°C. Therefore, when the aqueous solution comes into contact with the disk portion 3026, the aqueous solution is rapidly frozen on the disk portion 3026 and becomes ice (hybrid ice).
  • the sweeping section 3023 described above is provided with buff supports 3031, and a plurality of buffs 3033 are attached to each buff support 3031.
  • the buffs 3033 are arranged so as to face the plate surfaces 3026 a and 3026 b of the disc portion 3026 in the cooling portion 3021 .
  • the buff 3033 is arranged so as to contact the plate surfaces 3026a and 3026b of the disk portion 3026 with moderately weak pressure (low surface pressure).
  • the buff 3033 has a function (sweeping function) of sweeping the ice exposed on the plate surfaces 3026a and 3026b of the disc portion 3026 to separate it from the disc portion 3026.
  • the buff 3033 Various types of materials commonly used for polishing and the like can be used as materials for the buff 3033 .
  • the material of the buff 3033 it is possible to employ urethane, other synthetic resins, metal, wool, or the like.
  • the material of the buff 3033 include sponge, foam, brush, scrubbing brush, resin mesh, and non-woven fabric using the various materials described above.
  • the buff 3033 may be a metal blade or the like provided with a predetermined amount of clearance (for example, about 0.2 mm) from the plate surfaces 3026a and 3026b of the disk portion 3026.
  • each buff 3033 is attached to a rod-shaped spoke 3034 provided on the buff support 3031 .
  • Four spokes 3034 of the buff support 3031 are arranged at intervals of 90 degrees so as to face each plate surface 3026a, 3026b of the disc portion 3026.
  • the buff support 3031 is integrally connected to a round bar-shaped rotation transmission shaft 3035 .
  • the rotation transmission shaft 3035 passes through the disk portion 3026 in the thickness direction, avoiding the coolant hole 3027, so that it can rotate in forward and reverse directions around the axis.
  • the rotation transmission shaft 3035 can be rotationally displaced together with the buff 3033 with respect to the stationary disk portion 3026 .
  • each buff 3033 has a blade-like (elliptical) shape. It faces 3026a and 3026b.
  • Such sweeping section 3023 is connected to rotation drive section 3022 (FIG. 32) via rotation transmission shaft 3035 . It is preferable to rotate the sweeper 3023 at a rotation speed of, for example, 10 to 100 rpm (revolutions/minute).
  • a motor (buff drive motor) is incorporated in the rotation drive unit 3022, and the rotation drive unit 3022 rotates the aqueous solution Ws stored in the freezing tank 3012 (liquid surface is virtually indicated by a two-dot chain line in FIG. ), the sweeper 3023 can be continuously (or intermittently) rotated.
  • the rotation drive unit 3022 can be a unit (geared motor) that integrally includes a motor and a deceleration unit (gear unit). Further, the rotation driving part 3022 is positioned above the liquid surface of the aqueous solution Ws and is arranged to protrude outside the aqueous solution Ws. Further, the rotation driving section 3022 is not limited to one that rotates the sweeping section 3023 in one direction, and may be one that rotates the sweeping section 3023 in a reciprocating manner (performs a reciprocating rotational movement in forward and reverse directions).
  • the arrangement of the buffs 3033 described above is not limited to those shown in FIGS. 32 and 36, and various modes can be adopted.
  • the number of buffs 3033 may be less than four or five or more for each plate surface 3026a, 3026b of the disk portion 3026.
  • the aforementioned frame portion 3017 is configured by, for example, connecting rod-shaped parts to form a framework.
  • a material for the frame portion 3017 a general angle material, a round pipe, a square pipe, an extruded material, or the like can be used.
  • the parts of the frame portion 3017 are drawn in a strip shape to avoid complication of the drawing, but it is desirable to select the material in consideration of the required strength and structure.
  • welding, screw tightening (including bolt tightening), etc. can be adopted for joining the parts of the frame portion 3017 .
  • metal or synthetic resin can be adopted as the material of the frame portion 3017.
  • various general metals such as steel, stainless steel, and aluminum can be adopted as the metal. is.
  • a refrigerator 3014 and a flake ice making section 3015 are fixed to the frame section 3017 , and the frame section 3017 supports the refrigerator 3014 and the flake ice making section 3015 .
  • the fixing of the refrigerator 3014 and the ice flake making unit 3015 to the frame unit 3017 can be performed by general means such as bolting or screwing.
  • the frame portion 3017 supports the ice flake making portion 3015 so that the rotation driving portion 3022 of the ice flake making portion 3015 is out of the aqueous solution Ws.
  • the refrigerator 3014 When the ice slurry manufacturing device 3011 is placed on the floor or the like, the refrigerator 3014 is placed on the floor with a portion of the frame portion 3017 positioned below therebetween. On the other hand, the ice flake making unit 3015 is supported at a position horizontally displaced from the refrigerator 3014 by a predetermined amount and at a position somewhat higher than the lower end of the refrigerator 3014 .
  • the refrigerant tank straddling section 3019 of the refrigerant introduction pipe 3018a and the refrigerant outlet pipe 3018b is positioned so as to open downward.
  • a part of the frame part 3017 and the freezing tank 3012 is virtually notched as indicated by a chain double-dashed line.
  • the height from the lower end to the upper end of the ice slurry production device 3011 can be set to about 80-90 cm. Furthermore, the lower end of the ice slurry production device 3011 can be the portion of the frame portion 3017 that contacts the floor surface, and the upper end of the ice slurry production device 3011 can be the upper end of the rotary drive portion 3022 .
  • the height dimension of the ice slurry manufacturing device 3011 is set to about 80 cm, the height of the freezer tank 3012, which will be described later, becomes a height at which the worker who performs the freezing work can easily work.
  • the freezing tank 3012 and the aqueous solution Ws stored in the freezing tank 3012 will be described.
  • the freezing tank 3012 is formed in a rectangular container shape and has an open top. Although omitted in FIG. 32, the freezer tank 3012 is surrounded by a heat insulating material.
  • various general materials can be used as the heat insulating material.
  • each wall (including the bottom wall) of the freezing tank 3012 can be made, for example, with a built-in heat insulating material or hollow. If sufficient heat insulation can be obtained only by the walls of the freezing tank 3012, the heat insulating material around the freezing tank 3012 can be omitted as appropriate.
  • the aqueous solution Ws indicated by the two-dot chain line in FIG. 32 is the undiluted solution of the ice slurry (also called brine).
  • an ethanol aqueous solution having a predetermined concentration (here, 50 wt %) is used as the aqueous solution Ws.
  • the amount of the aqueous solution Ws can be, for example, approximately 200 L (liters).
  • the refrigerator 3014 of the ice slurry manufacturing apparatus 3011 is positioned outside the freezing tank 3012 and faces the wall 3012a of one end of the freezing tank 3012 in the longitudinal direction from the outside.
  • the flake ice making part 3015 is located inside the wall part 3012a, and the part from the lowest part to the middle height is immersed in the aqueous solution Ws stored in the freezing tank 3012 in a predetermined amount. ing.
  • a disc portion 3026 is arranged at the bottom of the ice flakes making portion 3015, and when the ice flakes making portion 3015 is immersed in the aqueous solution Ws, the whole disc portion 3026 is also immersed in the aqueous solution Ws.
  • the aqueous solution pump 3013 pumps up the aqueous solution Ws as indicated by a two-dot chain line arrow A1 in FIG. 32 and guides it to the freezing tank 3012 as indicated by an arrow A2. Then, the aqueous solution pump 3013 ejects the aqueous solution Ws toward the disc portion 3026 of the ice flake producing portion 3015 .
  • arrows A1 and A2 indicate paths of the aqueous solution, and illustration of piping is omitted.
  • aqueous solution pump 3013 Various general pumps can be used as the aqueous solution pump 3013, but it is considered to select the aqueous solution pump 3013 in consideration of solids (here, ice flakes) being mixed with the aqueous solution Ws. be done. Further, by passing the aqueous solution Ws mixed with flake ice through the piping or the aqueous solution pump 3013, the effect of preventing clogging of the flow path may be obtained. However, in order to prevent flake ice from passing through the aqueous solution pump 3013, it is conceivable to dispose a filter for removing flake ice and foreign matter from the aqueous solution Ws at the inlet of the pipe or at the front stage of the aqueous solution pump 3013. .
  • the aqueous solution Ws delivered by the aqueous solution pump 3013 is ejected from the nozzle portion 3041 as shown in FIG.
  • the nozzle part 3041 is immersed in the aqueous solution Ws stored in the freezing tank 3012, and the aqueous solution Ws ejected from the nozzle part 3041 (indicated by an arrow A3 here) entrains the aqueous solution Ws in the freezing tank 3012 to form a water flow. to form Then, the aqueous solution Ws (arrow A3) ejected from the nozzle portion 3041 causes the aqueous solution Ws stored in the freezing tank 12 to generate a flow velocity and give momentum. That is, the aqueous solution pump 3013, the nozzle portion 3041, and the like constitute a water flow generating mechanism (propulsion mechanism) as a flow forming portion that forms the flow of the aqueous solution Ws.
  • nozzle portion 3041 it is possible to adopt various common ones.
  • the nozzle part 3041 include those that eject the aqueous solution Ws in a conical shape as indicated by an arrow A3, and those that eject the aqueous solution Ws linearly (not shown).
  • the nozzle part 3041 is immersed in the aqueous solution Ws so as to generate a water flow around the disc part 3026 in the flake ice making part 3015 .
  • the water flow generated by the aqueous solution discharged from the nozzle portion 41 circulates between the walls 3012a and 3012b located at the ends of the freezing tank 3012 in the length direction (longitudinal direction, horizontal direction in FIG. 32).
  • the disk portion 3026 is cooled by the cold heat of the refrigerant from the refrigerator 3014, so that the aqueous solution Ws flowing around the disk portion 3026 is cooled by the disk portion 3026.
  • the conditions are adjusted, ice precipitates on the plate surfaces 3026 a and 26 b of the disk portion 3026 , and fine ice adheres to the periphery of the disk portion 3026 .
  • the ice thus exposed and adhering is swept from the disk portion 3026 as indicated by arrow A4 in FIG. Taken and separated (sweeping function). Since the sweeping section 3023 is rotating, the buff 3033 will pass through a certain place intermittently, and the ice will be separated from the disk section 3026 before it grows large.
  • each plate surface 3026a, 3026b of the disk portion 3026 becomes ice flakes, and these ice flakes are caught in the flow of the aqueous solution Ws (indicated by arrow A5) and blown away, bringing the aqueous solution Ws up to the freezing point of the aqueous solution Ws. Cooling.
  • the freezing of the products to be frozen can be performed, for example, by placing the products to be frozen in a metal basket indicated by reference numeral 3045 in FIG. be.
  • the water flow generating mechanism such as the aqueous solution pump 3013 and the nozzle portion 3041 to the frame portion 3017 .
  • the water flow generating mechanism can be provided integrally with the ice slurry manufacturing device 3011 .
  • the aqueous solution pump 3013 may be installed at a position away from the frame portion 3017 , and only the nozzle portion 3041 and the piping connected to the nozzle portion 3041 may be fixed to the frame portion 3017 .
  • the aqueous solution pump 3013 is installed at a position away from the frame portion 3017, the weight of the frame portion 3017 including the devices to be supported can be reduced.
  • the water flow generating mechanism such as the aqueous solution pump 3013 and the nozzle portion 3041 to the frame portion 3017 .
  • the water flow generating mechanism can be provided integrally with the ice slurry manufacturing device 3011 .
  • the aqueous solution pump 3013 may be installed at a position away from the frame portion 3017, and only the nozzle portion 3041 and the piping connected to the nozzle portion 3041 may be fixed to the frame portion 3017.
  • the aqueous solution pump 3013 is installed at a position away from the frame portion 3017, the weight of the frame portion 3017 including the devices to be supported can be reduced.
  • FIG. 37(a) schematically shows a state in which the buff 3033 separates ice from the disc portion 3026.
  • FIG. The buffs 3033 attached to the spokes 3034 horizontally move (rotate) from left to right in the drawing as indicated by a two-dot chain arrow C.
  • the buff 3033 is in contact with the upper plate surface 3026a of the disk portion 3026 with moderately weak pressure (low surface pressure).
  • the buff 3033 is made of a material having a certain degree of flexibility, and has a rectangular (here, substantially square) cross-sectional shape.
  • the buff 3033 generates friction by moving while being in contact with the plate surface 3026a of the disc portion 3026, and is deformed so that the cross-sectional shape becomes a parallelogram.
  • the buff 3033 strikes the ice (not shown) generated on the plate surface 3026a of the disc portion 3026 to apply an external force to the ice, thereby sweeping the ice off the plate surface 3026a of the disc portion 3026.
  • FIG. Furthermore, on the opposite side of the disk portion 3026 (lower plate surface 3026b), a buff 3033 sweeps off ice based on the same principle.
  • the cross-sectional shape of the buff 3033 and the cross-sectional shape of the spokes 3034 are both rectangular to explain the principle of sweeping by the buff 3033.
  • the spokes 3034 are not limited to this.
  • the spokes 3034 may be square bars, round bars, or other shapes.
  • the cross-sectional shape of the buff 3033 can be a shape other than a rectangle, and examples of shapes other than a rectangle include a triangular shape, a polygonal shape, a perfect circle, or an elliptical shape.
  • each buff can adopt various shapes other than the blade shape.
  • the planar shape of the buff 3033 is, for example, a perfect circular plate shape with a diameter of about 30 cm. It is also possible to rotate horizontally. Furthermore, it is also possible to make the outer diameter of the buff 3033 smaller than about 30 cm, and rotate one or more buffs 3033 while rotating.
  • power is transmitted from the side portion (side of the end portion) of the disk portion 3026 to a buff (not shown) without forming a hole through which the rotation transmission shaft 3035 is passed through the disk portion 3026.
  • a buff not shown
  • the sweeping portion 3023 can sandwich the disk portion 3026 and operate like a car wiper to sweep away the ice.
  • a gap of a predetermined amount (for example, 1 mm or less to several mm) is provided between the buff 3033 and each of the plate surfaces 3026a and 3026b of the disk portion 3026, and ice that has grown to a size larger than the gap is swept away.
  • fixing of the buff 3033 to the spokes 3034 can be performed by various general methods.
  • fixing methods include adhesion, screwing (bolting), riveting, and clamping.
  • a metal plate (metal blade, shaving tooth) 3038 as shown in FIG. 37(b).
  • a synthetic resin plate can also be used.
  • the gap H can be, for example, about 1 mm or less (0.2 mm, etc.).
  • turbulence can be generated, for example, in front and behind the metal plate 3038 and the like, as indicated by a plurality of arrows D in FIG. 37(b).
  • a turbulent flow can also be generated in the gap H between the metal plate 3038 or the like and the disk portion 3026 . Even if the metal plate 3038 or the like and the disk portion 3026 are not in contact with each other, the ice can be separated from the disk portion 3026 using this turbulent flow. This turbulent flow is likely to occur by moving the metal plate 3038 or the like quickly to some extent.
  • fixing of the metal plate 3038 or the like to the spokes 3034 can be performed in various general manners.
  • fixing methods include screwing (bolting), riveting, clamping, welding, and the like.
  • buff 3033, the metal plate, etc. can be replaced, for example, periodically for maintenance.
  • R404A or the like is used as the first refrigerant.
  • the lower limit of this R404A evaporation temperature setting is -60°C.
  • R447 or R448A is used as the refrigerant gas, setting the evaporation temperature to -60°C lowers the cooling efficiency.
  • the evaporation temperature is lower.
  • Refrigerant should be used.
  • Refrigerants having a lower evaporation temperature include liquefied natural gas (having an evaporation temperature of about -162°C) and liquid nitrogen (having an evaporation temperature of about -196°C).
  • liquefied natural gas and liquid nitrogen are relatively expensive, it is desirable to reduce the amount used as much as possible for cost reduction.
  • the first refrigerant (eg, -45°C) is caused to flow through the first refrigerant passage 3029A.
  • the disk portion 3026 is cooled by the first coolant, and the temperature of the aqueous solution Ws (freezing point -38°C) is gradually lowered.
  • the refrigerator 3014 stops supplying the first refrigerant.
  • the second refrigerant valve 3020a (FIG. 33) is opened, and the second refrigerant (here, liquid nitrogen) flows through the second refrigerant passage 3029B.
  • the fluidity of the second refrigerant is given by the pressure of the vaporized nitrogen gas in the second refrigerant tank 3020 .
  • the disk portion 3026 is cooled by the second refrigerant whose evaporation temperature is significantly lower than that of the first refrigerant, and the ice adhering to the disk portion 3026 is mixed with the aqueous solution Ws to form an ice slurry having a temperature lower than -38°C. is manufactured.
  • the first cooling is performed by using the first refrigerant for heat absorption (sensible heat absorption) related to the sensible heat portion from room temperature to -30°C. Furthermore, the refrigerant is switched, and for further cooling (cooling to which latent heat absorption is added), the cold heat of the second refrigerant is used to perform the second cooling.
  • This secondary cooling produces a cold ice slurry. Therefore, cooling can be performed in multiple stages (here, two stages), and cooling can be accelerated in the latter stage.
  • a cooling system can be called, for example, a "two-stage cooling system” or a "two-stage rocket system.”
  • liquid nitrogen liquefied natural gas or the like may be used
  • the cooling of the sensible heat portion is also less costly than when liquid nitrogen or the like is used. can be reduced.
  • the third disclosed aspect is not limited to a plate-shaped ice making section such as the disc section 3026, and can employ a cylindrical ice making section (drum type) or other various shaped ice making sections.
  • a cylindrical ice-making unit drum 21 of Patent Document 2 as described in Patent Document 2 cited above may be combined with a cooling unit of the present embodiment (corresponding to cooling unit 3021 in FIG. 32).
  • the ice making unit can be immersed in an aqueous solution (corresponding to the aqueous solution Ws in FIG. 32).
  • the cylindrical ice-making unit is in contact with the aqueous solution on both the outer peripheral surface and the inner peripheral surface.
  • a first refrigerant passage and a second refrigerant passage are formed in separate systems in the cylindrical ice making section.
  • a first refrigerant for example, one having an evaporation temperature of about ⁇ 60° C. to ⁇ 45° C.
  • a refrigerator corresponding to the refrigerator 3014 in FIG. 32.
  • the second refrigerant valve (corresponding to the second refrigerant valve 3020a in FIG. 33) is opened to allow the second refrigerant (liquid nitrogen or the like) to flow through the second refrigerant passage.
  • the cylindrical ice-making unit is cooled by the second refrigerant whose evaporation temperature is significantly lower than that of the first refrigerant.
  • the cylindrical ice-making unit as described above is formed with a bottom portion and the lower end is closed, and the inside of the cylindrical ice-making unit is filled (or stored) with an aqueous solution to form a cylindrical ice-making unit. It is also conceivable to use the ice making section as a tank for the aqueous solution.
  • a freezing tank corresponding to the freezing tank 3012 in FIG. 32 is formed using metal, and a first refrigerant passage and a second refrigerant passage are formed in the wall of the freezing tank. It is also possible. Also in this case, the first refrigerant is passed through the first refrigerant passage to cool the aqueous solution in the freezing tank, and after the temperature of the aqueous solution reaches a predetermined set temperature, the first refrigerant is stopped and switched to the second refrigerant, Additional cooling can be provided.
  • the third disclosed aspect is not limited to manufacturing ice slurry by immersing the ice-making unit in the aqueous solution or storing the aqueous solution in the ice-making unit as described above.
  • the present invention can also be applied to an ice-making device for making flake ice.
  • the first refrigerant passage and the second refrigerant passage are formed in the ice making section.
  • an atomized aqueous solution (brine) is sprayed onto the ice making section to bring the aqueous solution into contact with the ice making section.
  • the first refrigerant is passed through the first refrigerant passage of the ice making unit to cool the aqueous solution in the freezing tank, and then the first refrigerant is stopped and switched to the second refrigerant for further cooling.
  • each embodiment merely shows an example of implementation for carrying out the third disclosed aspect, and the technical scope of the present invention should not be construed to be limited by this. .
  • the invention may be embodied in various forms without departing from its spirit or essential characteristics.
  • Each technical matter in the third disclosure mode can be applied to the first disclosure mode (FIGS. 1 to 18) and the second disclosure mode (FIGS. 19 to 31) as long as there is no problem.
  • FIG. 38 shows an ice-making device 4010 according to an embodiment by seeing through the inside.
  • FIG. 38 schematically shows a worker A having a typical physique.
  • FIG. 39 shows the ice making device 4010 of FIG. 38 at a different angle.
  • the ice-making device 4010 includes an ice-making tank 4012 that stores brine (described later), and an ice-making section 4020 that is arranged inside the ice-making tank 4012 and can come into contact with the brine.
  • the ice making tank 4012 is supported by an above-floor pedestal 4052 installed on the floor 4050 in a floating state.
  • a suspension frame 4030 is provided in a state of being suspended from the ceiling portion 4013 .
  • the suspension frame 4030 supports the ice making plate (the disk portion 4014 in the examples of FIGS. 38 and 39) and the sweeping portion 4016 placed in the ice making tank 4012 at a position floating from the bottom portion 4018 of the ice making tank 4012. ing.
  • the shape of the ice making tank 4012 is cylindrical, and the ice making tank 4012 is made of metal such as steel. In the examples of FIGS. 38 and 39, both the diameter and height of the ice making tank 4012 are approximately 2 m.
  • the ice making tank 4012 may have any shape and size as long as it can make ice.
  • the shape of the ice making tank 4012 various shapes such as a circular shape, a triangular shape, a square shape, a polygonal shape, an elliptical shape, and the like can be adopted.
  • the material of the ice making tank 4012 may be a stainless alloy, FRP (fiber reinforced plastic), or the like. Also, the ice making tank 4012 may be a combination of two or more of steel parts, stainless alloy parts, and FRP parts.
  • the material of the ice making tank 4012 is steel, it is necessary to apply antirust treatment.
  • antirust treatment various general methods such as painting and surface treatment can be employed.
  • a predetermined portion of the ice making tank 4012, for example, an outer peripheral portion, may be covered with a heat insulating material.
  • An opening/closing panel 4019 is provided on the ceiling portion 4013 of the ice making tank 4012 .
  • the opening/closing panel 4019 has a hinge (not shown) and can be opened/closed as required. 38 and 39 show a state in which the open/close panel 4019 is opened. For example, when worker A climbs on a stepladder (not shown) or the like and opens open/close panel 4019 , worker A can view the inside of ice making tank 4012 through viewing opening 4021 . It is also possible to provide a projecting portion serving as a foothold on the outside of the ice making tank 4012 so that the operator A can easily perform the work of visually recognizing the inside.
  • a motor 4022 is provided outside the ceiling portion 4013 of the ice making tank 4012 .
  • the motor 4022 is of a type (geared motor) integrally provided with a speed reducer.
  • a straight-rod rotating shaft 4024 is connected to the motor 4022, and the motor 4022 rotates the rotating shaft 4024 around its axis.
  • the motor 4022 is fixed to a detachable section 4015 provided on the ceiling section 4013 of the ice making tank 4012 .
  • Detachable portion 4015 is detachably attached to ceiling portion 4013 of ice making tank 4012 via a plurality of bolts 4017 .
  • Motor 4022 and rotating shaft 4024 can also be removed from ice making tank 4012 by removing detachable portion 4015 from ceiling portion 4013 of ice making tank 4012 .
  • Reference numeral 4026 in FIGS. 38 and 39 is a discharge pipe for removing the produced ice slurry.
  • Ice making section 4020 includes disk section 4014 and sweeping section 4016 .
  • the number of disk units 4014 is two.
  • a sweeping section 4016 is provided for one disk section 4014 .
  • the two disk portions 4014 are supported by a suspension base 4030 with a predetermined gap in the vertical direction on the same straight line (corresponding to the vertical direction in FIGS. 38 and 39). These discs 4014 are fixed horizontally and parallel to each other on a suspension cradle 4030 .
  • the sweeping part 4016 is connected to the rotating shaft 4024 and performs horizontal rotational displacement integrally with the rotating shaft 4024 . The details of disk portion 4014 and sweeping portion 4016 will be described later.
  • the disk part 4014 and the sweeping part 4016 are integrated by a suspension base 4030 .
  • the upper end portion of the hanging base 4030 is coupled to a detachable portion 4015 provided on the ceiling portion 4013 of the ice making tank 4012 .
  • detachable portion 4015 is removed from ceiling portion 4013 of ice making tank 4012
  • ice making portion 4020 can also be removed from ice making tank 4012 together with suspension base 4030 .
  • the suspension frame 4030 is formed in a frame shape by joining square pipes vertically and horizontally.
  • the hanging frame 4030 and the attachment/detachment part 4015 are positioned not at the center of the ceiling part 4013 of the ice making tank 4012 but at positions offset from the center.
  • the position of the suspension mount 4030 is indicated by a dashed line.
  • each disk portion 4014 is made of a rectangular (here, square) metal plate.
  • the size (dimensions) of the disk portion 4014 can be, for example, an outer shape of about 30 to 100 cm square and a plate thickness of about 30 to 60 mm.
  • the shape of the disk portion 4014 is not limited to a rectangle, and is preferably circular so that the tips of the scraping teeth 4048 do not deviate from the plate surface 4014a (or plate surface 4014b).
  • each disk portion 4014 is processed to be substantially flat and parallel to each other.
  • a material for the disk portion 4014 copper or a copper alloy having high thermal conductivity is adopted.
  • the surface of the disk portion 4014 is plated with a wear-resistant metal (for example, chromium).
  • Disk portion 4014 may be cast or machined.
  • a straight refrigerant pipe 4034 and a U-shaped refrigerant pipe (hereinafter referred to as a “U-shaped pipe”) 4036 that serves as a folded portion are connected. It is A large number of straight coolant channels 4038 are formed parallel to each other inside the disk portion 4014 . These refrigerant flow paths 4038 are spatially connected via a U-tube 4036 to form a refrigerant guide path 4039 .
  • the coolant channel 4038 is formed by drilling the material of the disc portion 4014 .
  • a straight refrigerant pipe 4034 constitutes an introduction portion and an outlet portion of a refrigerant guide path 4039 .
  • the straight refrigerant pipe 4034 is connected to the refrigerant introduction hose 4040 shown in FIGS. Used.
  • a through hole (reference numeral omitted) is formed in the central portion of the plate surfaces 4014a and 4014b of the disc portion 4014 .
  • illustration of through holes is omitted.
  • a rotating shaft 4024 is passed through the through hole, and the rotating shaft 4024 penetrates the disk portion 4014 in the thickness direction.
  • the coolant channel 4038 is formed avoiding the through hole.
  • a refrigerant introduction hose 4040 and a refrigerant discharge hose 4042 connected to the disk portion 4014 are flexible hoses.
  • the refrigerant introduction hose 4040 and the refrigerant outlet hose 4042 are elastically deformed, and the movement of the ice making unit 4020, etc. follow.
  • the refrigerant introduction hose 4040 and the refrigerant outlet hose 4042 are covered with a heat insulating material (reference numerals omitted).
  • a refrigerant is supplied to the disk portion 4014 via a refrigerant introduction hose 4040 .
  • the disk portion 4014 is cooled by a refrigerant, and cooling of the disk portion 4014 and ice making using the disk portion 4014 will be described later.
  • the sweeping part 4016 is formed in the shape of a four-bladed propeller (see FIGS. 38 and 39).
  • the sweeping part 4016 is arranged so as to face each plate surface 4014a, 4014b of the disk part 4014, as schematically shown in FIG.
  • FIGS. 40 and 41 in order to simplify the illustration, illustration of some (two) blades is omitted, and only two blades are shown. Also, FIG. 41 shows only the disc portion 4014 arranged in the lower stage.
  • the sweeping part 4016 has an arm 4046 and a scraping tooth 4048 on each blade. Arms 4046 are arranged at 90 degree intervals on rotating shaft 4024 . Four arms 4046 are provided for one plate surface 4014 a (or plate surface 4014 b ) of the disk portion 4014 .
  • Each arm 4046 is equipped with one scraping tooth 4048 .
  • the shaving tooth 4048 faces the plate surface 4014a (and 4014b) of the disk portion 4014 with the cutting edge facing.
  • the shaving tooth 4048 is attached to the arm 4046 so as to be inclined at a predetermined angle.
  • Metal, synthetic resin, or the like can be used as the material of the scraping teeth 4048 .
  • the sweeping part 4016 rotates while facing the plate surfaces 4014 a and 4014 b of the disk part 4014 as the rotary shaft 4024 rotates. Due to the rotation of the sweeping part 4016 , the shaving tooth 4048 attached to the arm 4046 also rotates with the cutting edge facing the plate surface of the disk part 4014 .
  • the sweeping part 4016 collides with ice (not shown) adhering to the disk part 4014 and separates the ice from the disk part 4014 .
  • the sweeping portion 4016 may be provided, for example, so that the scraping teeth 4048 are in contact with the disk portion 4014, as shown in FIG. 43(a).
  • the sweeping portion 4016 is provided, for example, as shown in FIG. 43(b), so that a clearance of a predetermined interval H (for example, about 0.2 mm) is interposed between the shaving tooth 4048 and the disk portion 4014.
  • a predetermined interval H for example, about 0.2 mm
  • the sweeping portion 4016 when the sweeping portion 4016 is provided with a clearance H between it and the disk portion 4014, the sweeping portion 4016 is arranged between the plate surfaces 4014a and 4014b.
  • the turbulent flow (indicated by arrow D) generated between the ice is used to separate the ice.
  • the sweeping portion 4016 collides with the grown ice when the ice grows to the size H of the clearance or more. to separate the ice from the disk portion 4014 .
  • abrasion of the shaving teeth 4048 and the disk portion 4014 can be prevented.
  • a refrigerant such as liquid nitrogen is supplied to the refrigerant guide path 4039 of the disk portion 4014 .
  • a refrigerant tank 4054 is installed outside the ice making tank 4012 . refrigerant is delivered.
  • LNG liquefied natural gas
  • flon flon
  • HFC hydrofluorocarbon
  • FIG. 40 schematically shows an ice-making system 4056 including the ice-making tank 4012 and the refrigerant tank 4054, and includes a pump used for sending the refrigerant, a valve device for controlling the flow, temperature, pressure, etc. Illustrations of various devices such as gauges (meters) indicating the are omitted. Illustrations of various devices such as a pump, a valve device, and instruments (meters) related to the brine Ws are also omitted.
  • the refrigerant cools the disk portion 4014 with its cold heat, and the disk portion 4014 cools the brine Ws flowing around it.
  • the disk portion 4014 cools the brine Ws flowing around it.
  • Adhered ice is swept away by the sweeping unit 4016 and separated from the disk unit 4014 .
  • the ice separated from the disk portion 4014 becomes flaky ice (also called flake-like, small lump-like, or grain-like) and is mixed with the brine Ws.
  • flaky ice also called flake-like, small lump-like, or grain-like
  • the production of flake ice continues as the sweeper 4016 rotates, and the proportion of ice in the brine Ws gradually increases. Ice slurry is produced in the ice making tank 4012 by continuously mixing the flake ice with the brine Ws.
  • the mode of rotation of the sweeping unit 4016 that separates the ice may be continuous at an angle exceeding 360 degrees (continuous rotation), or may stop for a predetermined time at each predetermined angle within 360 degrees (intermittent rotation). rotation).
  • Brine Ws means an aqueous solution with a low freezing point containing one or more solutes.
  • Specific examples of the brine Ws include sodium chloride aqueous solution (salt water), calcium chloride aqueous solution, magnesium chloride aqueous solution, ethylene glycol aqueous solution, ethanol aqueous solution, and the like.
  • the freezing point of a sodium chloride aqueous solution (saturated state) is -21°C
  • the freezing point of a magnesium chloride aqueous solution (saturated state) is -26.7°C.
  • the freezing point of ethanol (approximately 50 wt%, 60 wt%) is, for example, approximately -37°C or -50°C. Therefore, when an aqueous solution such as these is used as brine, when the brine adheres to disk portion 4014 , it is rapidly frozen and a film of ice (hybrid ice) is formed on the surface of disk portion 4014 .
  • the ice slurry made in the ice making tank 4012 is a mixture of fine ice and liquid.
  • this ice slurry is allowed to stand still in the ice making tank 4012, the minute ice aggregates into large particles. Therefore, it is desirable to stir the ice slurry in the ice making tank 4012 at a relatively low speed. By stirring the ice slurry, it is possible to maintain a good slurry state with a small particle size.
  • FIG. 44 shows an image of the ice slurry 4058 in good condition that was transferred to a Styrofoam container and photographed.
  • FIG. 44 shows a state in which ice is not agglomerated, and ice slurry 4058 is pasty with moderate viscosity.
  • the viscosity of ice slurry 4058 is generally uniform throughout. It is desirable to keep the ice slurry in this state in the ice making tank 4012 continuously.
  • the stirring device 4060 has a screw portion 4063. As shown in FIG.
  • the screw portion 4063 is arranged inside the ice making tank 4012 and provided at the tip of the rotating shaft 4064 .
  • the screw portion 4063 is driven to rotate about its axis via a rotation shaft 4064 by a rotation drive portion 4066 such as a motor arranged outside the ice making tank 4012 . Rotation of the screw portion 4063 is performed continuously (or intermittently).
  • the screw portion 4063 is directed obliquely within the ice making tank 4012 .
  • the screw portion 4063 is fixed to the ice making tank 4012 at a vertical angle indicated by ⁇ 1 in FIG. 45(a) and a horizontal angle indicated by ⁇ 2 in FIG. 45(b).
  • the screw part 4063 generates an ice slurry flow (water flow) in the ice making tank 4012 by rotating. This water flow agitates the ice slurry throughout and continuously.
  • the agitator 4060 the ice slurry can be agitated separately from the agitation by the sweeper 4016.
  • the hanging frame 4030 and the attachment/detachment part 4015 are not in the center of the ceiling part 4013 placed on the ice making tank 4012, but are offset from the center.
  • the position of the stirring device 4060 is a diagonal position centered on the center of the ice making tank 4012 when the ice making tank 4012 is viewed from above (also called a position with a phase shift of 180 degrees). say).
  • the stirring device 4060 it becomes easier to secure the installation space for the stirring device 4060 .
  • the flow along the wall surface of the ice-making tank 4012 from the stirring device 4060 toward the hanging frame 4030 and the flow returning from the hanging frame 4030 to the stirring device 4060 can be formed symmetrically.
  • the diffusibility of the ice separated from the disc portion 4014 can be improved, making it possible to prevent ice from adhering to the sweeping portion 4016. As a result, it becomes possible to continuously provide ice slurry in good condition.
  • the ice slurry in the ice making tank 4012 has a substantially uniform viscosity as a whole (see FIG. 44), but ice may adhere to the sweeping portion 4016 (especially the scraping teeth 4048). Such adhesion of ice to the sweeping portion 4016 is considered to occur as follows.
  • FIG. 46 shows an image of a sweeping portion 4016 having a scraping tooth angle different from that of the embodiment, but with ice 4068 adhering to the sweeping portion 4016 .
  • the ice 4068 deposited on the sweeping part 4016 will naturally peel off when it grows to a certain extent.
  • the delaminated ice is mixed into the ice slurry as solids of a certain size, resulting in non-uniform quality of the ice slurry.
  • contamination with solid matter is not preferable.
  • adhesion of ice to the sweeping portion 4016 is prevented by applying a water-repellent coating (also called “non-wetting coating” or “slippery coating”). Adhesion of ice to the sweeping portion 4016 can also be prevented by applying a water-repellent coating.
  • a water-repellent coating By applying a water-repellent coating to the arms 4046 and the scraping teeth 4048 of the sweeping part 4016, the water repellency (non-wetability, slipperiness, etc.) of these parts can be improved.
  • a fluorine resin coating can be used for the water-repellent coating.
  • a common fluororesin coating can be used. By performing the fluororesin coating, it is possible to obtain sufficient non-wetting properties even if the fluororesin coating is very thin.
  • the coefficient of friction can be kept small by applying a fluororesin coating. Also, the wear resistance of the sweeping portion 4016 can be improved. Even when the shaving teeth 4048 of the sweeping portion 4016 are in contact with the disk portion 4014 (FIG. 43(a)), abrasion of the shaving teeth 4048 and the disk portion 4014 can be prevented.
  • the heat resistance (cold-heat resistance) of the sweeping portion 4016 can be improved.
  • the parts in the ice making tank 4012 are exposed to low temperatures such as the refrigerant and brine Ws, and thus low temperature embrittlement may occur. Therefore, the occurrence of low-temperature embrittlement can be prevented by applying a fluororesin coating as a water-repellent coating.
  • a fluorine paint is used for the fluorine resin coating.
  • fluorine paint various general ones can be adopted as long as they can be used in the ice making tank 4012 .
  • fluorine paint include PTFE (polytetrafluoroethylene) paint, FEP (fluorinated ethylene propylene copolymer) paint, PFA (Tetrafluoroethylene-perfluoroalkylvinylether copolymer) paint, PTFE/PFA composite paint, modified paint, and the like. are known.
  • the scraping teeth 4048 may be the target of the water-repellent coating. Moreover, it may be a part other than the arm 4046 and the scraping teeth 4048 . Furthermore, the target of the water-repellent coating may be only a part of each part.
  • the target of the water-repellent coating is not limited to the sweeping portion 4016.
  • the disk portion 4014 may be coated with a water-repellent coating.
  • the water-repellent coating may be applied only to a portion of the disk portion 4014 (for example, plate surfaces 4014a and 4014b).
  • the plate surfaces 4014a and 4014b of the disk portion 4014 may be partially coated with a water-repellent coating.
  • the U-shaped tube 4036 is strongly cooled because the refrigerant passes through it, and ice may stick to it. Therefore, it is preferable to apply a water-repellent coating to the U-shaped tube 4036 (especially to the outer peripheral surface). Similarly, it is preferable to apply a water-repellent coating to the straight refrigerant pipe 4034 as well.
  • the inner wall surface of the ice making tank 4012 and the rotating shaft 4024 may be entirely or partially coated with a water-repellent coating.
  • the screw portion 4063 and the rotating shaft 4064 of the agitating device 4060 may be entirely or partially coated with a water-repellent coating.
  • the water-repellent coating may be applied to the device with the highest priority (here, the sweeping unit 4016) and other devices (including some).
  • water-repellent coating may be applied to all devices and parts where ice may adhere.
  • Equipment and parts that may have ice adherence include the sweeping part 4016, the disk part 4014, the inner wall surface of the ice making tank 4012, the rotating shaft 4024, the hanging base 4030, and the screw part of the stirring device 4060.
  • 4063, rotating shaft 4064, etc. can be exemplified. Of these, it is particularly desirable to apply a water-repellent coating to the suspension base 4030, the rotary shaft 4064 of the stirring device 4060, and the screw portion 4063.
  • the thermal conductivity of the coating agent itself is generally small, but the film thickness is thin and the cold heat conduction distance is short. Therefore, for example, when the sweeping portion 4016 is coated with a water-repellent coating, the plate surfaces 4014a and 4014b of the adjacent disk portion 4014 are hardly affected by heat transfer.
  • the coating agent for example, fluorine paint
  • the thermal conductivity of the coating agent itself is generally small, but the film thickness is thin and the cold heat conduction distance is short. Therefore, for example, when the sweeping portion 4016 is coated with a water-repellent coating, the plate surfaces 4014a and 4014b of the adjacent disk portion 4014 are hardly affected by heat transfer.
  • the water-repellent coating can be used together with stirring by a stirring device 4060 as shown in FIGS. 45(a) and (b).
  • the water repellency of the water repellent coating can be utilized after increasing the diffusibility of ice around the disk portion 4014 by the stirring device 4060 .
  • the synergistic effect of the water-repellent coating and the stirring by the stirring device 4060 can keep the ice slurry in a good condition.
  • the ice making unit 4020 is fixed to a suspension frame 4030 and the refrigerant tank 4054 is installed at a fixed position, but the suspension frame 4030 can be removed from the ice making tank 4012 . Therefore, maintenance and inspection of the ice-making unit 4020 can be performed by removing the suspension base 4030 from the ice-making tank 4012 . In addition, maintenance and inspection of the ice making unit 4020 are easy.
  • the disk part 4014 supported by the suspension frame 4030 is connected to the coolant tank 4054 via the coolant introduction hose 4040 and the coolant discharge hose 4042 having flexibility. Therefore, maintenance and inspection of the ice making section 4020 can be performed without removing the refrigerant introduction hose 4040 and the refrigerant discharge hose 4042 from the disk section 4014 or from the refrigerant tank 4054 . This also facilitates maintenance and inspection of the ice making section 4020 .
  • the ice slurry can be agitated by means other than the sweeping unit 4016. This allows the ice slurry to be more thoroughly agitated and improves ice diffusivity.
  • the number of disk portions 4014 is two in FIGS. 38 to 41, the number of disk portions 4014 may be one, or three or more. Moreover, the plurality of disk portions 4014 are not limited to being arranged on the same straight line. ), and may be arranged in a staggered manner.
  • the coolant guide path 4039 of the disk portion 4014 is formed using the U-shaped tube 4036.
  • the disk portion 4084 as schematically shown in FIGS. 47 and 48, for example.
  • a single refrigerant guide path 4089 is formed inside the disk portion 4084 shown in FIG. 47 as indicated by the dashed line in FIG.
  • the coolant guide path 4089 is a meandering hole, and has linear portions extending parallel to each other, portions bent in a U-shape, and the like.
  • the disc portion 4084 is provided with a through hole 4088 for allowing the rotating shaft 4024 to pass therethrough.
  • Refrigerant guide path 4089 is formed avoiding through hole 4088 .
  • the disk portion 4084 can be manufactured, for example, as shown in FIG. FIG. 48 shows a method of manufacturing the disc portion 4084 .
  • the disc portion 4084 is formed by facing a half-split first plate 4092 and a second plate 4093 and overlapping them as indicated by an arrow E and joining them.
  • the first plate 4092 and the second plate 4093 are formed by casting or cutting. Also, the first plate 4092 and the second plate 4093 have the same outer dimensions, and each thickness is, for example, about 15 to 20 mm.
  • the first plate 4092 and the second plate 4093 are dug with 40 grooves 94 and 4095 that serve as coolant guide paths 4089 .
  • the grooves 4094 and 4095 have a number of linear portions 4096 formed parallel to each other and a U-shaped portion 4097 connecting the linear portions 4096 .
  • Both ends of the grooves 4094 and 4095 are opened in a semicircular shape (not shown) at the end faces of the first plate 4092 and the second plate 4093 .
  • the grooves 4094 and 4095 are formed in a mirror relationship so as to be line-symmetrical with each other.
  • a single coolant guide path 4089 is formed by overlapping the first plate 4092 and the second plate 4093 .
  • an ice slurry production tank (ice making tank 4012, etc.) for storing brine (brine Ws, etc.); an ice-making unit (ice-making unit 4020, etc.) arranged inside the ice slurry manufacturing tank and capable of coming into contact with the brine,
  • the ice-making unit includes an ice-making plate (disk portion 4014, etc.) having ice-making surfaces (plate surfaces 4014a, 4014b, etc.); a sweeping unit (sweeping unit 4016, etc.) that separates ice produced on the ice making surface from the ice making surface by displacement (rotational displacement, etc.) with respect to the ice making surface;
  • An ice-making device (ice-making device 4010, etc.) characterized in that at least part of the sweeping portion (arm 4046, scraping tooth 4048, etc.) is coated with a water-re
  • the ice-making plate is supported by a support (suspension frame 4030 or the like) arranged in the ice slurry production tank, and the support is detachably attached to the ice slurry production tank.
  • the ice slurry manufacturing apparatus (such as the ice making apparatus 4010) according to (1) above, characterized in that: By doing so, the ice making plate and the support can be removed from the ice slurry making tank, which facilitates maintenance and inspection of the ice making plate and the support.
  • the ice slurry production tank is provided with a confirmation portion (visual opening 4021 or the like) for visually recognizing at least one of the ice making plate and the sweeping portion.
  • the ice slurry production device (ice making device 4010, etc.). By doing so, it is possible to visually inspect the ice making plate and the support portion without removing them from the ice slurry making tank. Then, it becomes possible to easily improve the reliability of the ice making device.
  • the ice slurry making apparatus (ice making apparatus) according to any one of (1) to (3) above, characterized in that a plurality of sets (such as two sets) of the ice making plate and the sweeping section are provided. device 4010, etc.). By doing so, it is possible to improve the efficiency of ice making.
  • the ice slurry production apparatus according to any one of .
  • an ice slurry production tank (such as ice making tank 4012) for storing brine (such as brine Ws); an ice-making unit (ice-making unit 4020, etc.) arranged inside the ice slurry manufacturing tank and capable of coming into contact with the brine,
  • the ice-making unit includes an ice-making plate (disk portion 4014, etc.) having ice-making surfaces (plate surfaces 4014a, 4014b, etc.);
  • An ice-making device (ice-making device 4010, etc.) having a sweeper (sweeper 4016, etc.) that separates ice produced on the ice-making surface from the ice-making surface by displacement (rotational displacement, etc.) with respect to the ice-making surface.
  • An ice making method using At least part of the sweeping section is coated with a water-repellent coating (fluororesin coating, etc.), and the water-repellent coated sweeping section is displaced to separate the ice from the ice making surface.
  • ice making method By doing so, it is possible to prevent the adhesion of ice to the sweeping portion and the mixing of the ice adhering to the sweeping portion into the ice slurry, thereby improving the reliability of the ice making apparatus.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Production, Working, Storing, Or Distribution Of Ice (AREA)

Abstract

L'invention concerne un dispositif de fabrication de glace qui peut être facilement miniaturisé. Le dispositif de fabrication de glace comprend une cuve de congélation 12 qui stocke de la saumure et une unité de fabrication de glace en flocons 15 agencée à l'intérieur de la cuve de congélation 12 et apte à être immergée dans la saumure Ws, l'unité de fabrication de glace en flocons 15 ayant une partie disque 26 ayant des surfaces de plaque 26a, 26b qui amènent un fluide frigorigène, qui est fourni à partir d'un réfrigérateur 14, à circuler dans celle-ci et qui génèrent de la glace de la saumure Ws, une partie buse 41 qui adresse un courant de la saumure Ws aux surfaces de plaque 26a, 26b, et un dispositif de balayage 23 qui est déplacé par rapport aux surfaces de plaque 26a, 26b pour séparer la glace générée sur les surfaces de plaque 26a, 26b à partir des surfaces de plaque 26a, 26b.
PCT/JP2022/027367 2021-07-20 2022-07-12 Dispositif de fabrication de glace et procédé de fabrication de glace Ceased WO2023002881A1 (fr)

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CN202280051120.7A CN117677810A (zh) 2021-07-20 2022-07-12 制冰装置以及制冰方法
US18/290,887 US20240255202A1 (en) 2021-07-20 2022-07-12 Ice-making device and ice-making method
EP22845815.4A EP4375593A4 (fr) 2021-07-20 2022-07-12 Dispositif de fabrication de glace et procédé de fabrication de glace

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JP2021-119773 2021-07-20
JP2021119773A JP2023015785A (ja) 2021-07-20 2021-07-20 製氷装置
JP2021126961A JP7607927B2 (ja) 2021-08-02 2021-08-02 製氷装置及び製氷方法
JP2021-126961 2021-08-02
JP2021-194329 2021-11-30
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