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WO1999018400A1 - Dispositif de production de glace - Google Patents

Dispositif de production de glace Download PDF

Info

Publication number
WO1999018400A1
WO1999018400A1 PCT/NL1998/000552 NL9800552W WO9918400A1 WO 1999018400 A1 WO1999018400 A1 WO 1999018400A1 NL 9800552 W NL9800552 W NL 9800552W WO 9918400 A1 WO9918400 A1 WO 9918400A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat transfer
transfer medium
panel
flow
instance
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/NL1998/000552
Other languages
English (en)
Dutch (nl)
Inventor
Herman Johan Oonk
Johannes Martinus Ten Siethof
Willem Frederik Jense
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.)
Omega Engineering BV
Original Assignee
Omega Engineering BV
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
Application filed by Omega Engineering BV filed Critical Omega Engineering BV
Priority to AU91906/98A priority Critical patent/AU9190698A/en
Publication of WO1999018400A1 publication Critical patent/WO1999018400A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F25C5/00—Working or handling ice
    • F25C5/02—Apparatus for disintegrating, removing or harvesting ice
    • F25C5/04—Apparatus for disintegrating, removing or harvesting ice without the use of saws
    • F25C5/08—Apparatus for disintegrating, removing or harvesting ice without the use of saws by heating bodies in contact with the ice
    • F25C5/10—Apparatus for disintegrating, removing or harvesting ice without the use of saws by heating bodies in contact with the ice using hot refrigerant; using fluid heated by refrigerant
    • 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

Definitions

  • the invention relates to a device for producing a mass of ice in successive cycles, which device comprises: a hollow panel through which can flow a first heat transfer medium and which is placed in a position varying substantially from the horizontal position; means for causing a liquid, for instance water, an aqueous salt solution or a mixture of water with for instance alcohol, such as glycol, to flow over at least a part of the outer surface of the panel such that due to through-flow of first heat transfer medium with a temperature below freezing point or below or in the freezing range of the liquid, for instance 0°C for water, at least a part of the liquid flowing along freezes and forms an ice crust adhering to said outer surface; and heating means for heating said outer surface to above said temperature such that the formed ice crust becomes detached from the surface and slides or falls downward .
  • a liquid for instance water, an aqueous salt solution or a mixture of water with for instance alcohol, such as glycol
  • the device usually comprises automatically operating control means which ensure that, after the formation of an ice crust for a certain time, the relevant outer surface is heated to above freezing point, whereby the ice crust loses its adhesion to that outer surface and slides or falls down under the influence of the force of gravity to be collected in a tray, on a conveyor belt or the like .
  • the growth of the ice crust can for instance take place for 10 to 15 minutes, whereafter the subsequent heating lasts until the grown ice crust has fallen from the plate. This can take for instance 30 to 60 seconds .
  • a known device makes use of an injection of heated ammonia, for instance at a temperature of approximately 40°C, into the space enclosed by the panel.
  • the drawback of this technique is that considerable pressure changes occur in the Oanel, for instance between 2.5 and 8 bar. This can, after many cycles, result in fatigue in the panel material. Such fatigue can cause hair cracks, leakage and rupture, while the temperature reached on the surface is moreover difficult to control. This latter will mean in practice that operation always takes place with an excess of supplied heat, which is undesirable for economic reasons .
  • the invention now has for its object to embody a device of the described type such that said pressure changes occur to a lesser degree and that furthermore the quantity of supplied heat can be properly controlled.
  • the device according to the invention has the feature that the heating means comprise a heating element which is placed in the cavity present in the panel and which can be activated from outside. During activation of the heating element the through-flow of first heat transfer medium will be temporarily interrupted.
  • a specific embodiment has the feature that the first heat transfer medium in the cavity is partly in the liquid phase and partly in the gas or vapour phase and that the heating element is situated in the lower zone of the cavity.
  • the heating element can in principle be of any suitable type, for instance electric.
  • a preferred embodiment has the special feature that the heating element comprises a heat exchanger through which can flow a heated second heat transfer medium.
  • the device preferably has the feature that the second heat transfer medium is of a type which only freezes at a temperature which is lower than the lowest temperature of the first heat transfer medium.
  • the second heat transfer medium contains a glycol .
  • Use can for instance be made of an ethylene glycol which is diluted with water with a concentration of 20%. Such a mixture only freezes at about -10°C. At a panel temperature of roughly -8°C an ice crust is obtained with a temperature in the order of about -4°C. It is preferably ensured that the water flowing along has a temperature of just above 0°C.
  • thermal oil or steam for instance may also be considered suitable as second heat transfer medium. Steam can have the drawback that it may possibly result in freezing during the cooling period.
  • a particular embodiment is characterized by control means for alternately
  • An important embodiment of the device consists of an assembly of two devices provided with control means for alternately causing the first heat transfer medium to flow and activating the heating element respectively, while cooling means are present for cooling the first heat transfer medium, which cooling means also serve to heat the second heat transfer medium.
  • the assembly of the two devices comprises one joint compressor and one joint condenser, wherein the control means are adapted to alternately cause flow of (a) cold heat transfer medium through the panel of the one device and hot heat transfer medium through the heat exchanger of the other device; and
  • the one device can serve to form ice while the other device is defrost- ed.
  • the whole assembly makes use of only one heat transfer medium but is adapted such that by means of controllable valves, for instance under the control of a central control unit, respectively cold or hot heat transfer medium is carried through the relevant respective compo- nents .
  • These components are respectively the hollow panel and the heat exchanger of the two devices which is arranged therein.
  • Any two-phase medium is suitable as first heat transfer medium, such that the panel can function as evaporator plate.
  • ammonia a suitable Freon, propane, R22, R134A, R404A, etc.
  • Figures 1, 2, 3 and 4 show four successive phases of a cycle for producing ice; figure 5 shows an operational situation of the device in which water is cooled; figure 6 shows a view corresponding with figures 1-5 of an assembly of two devices; and figures 7, 8, 9 and 10 show schematic drawings of the device of figure 6 in successive operational situations during one full freezing/defrosting cycle.
  • Figure 1 shows a hollow panel 1 through which can flow a first heat transfer medium. This panel forms part of a circuit designated with arrows 2 in which the first cooled and cooling heat transfer medium flows. It is pointed out here that the arrows 2 are not drawn in
  • tray 6 also has a drain 22. This serves on the one hand to empty the tray and can on the other hand also have the function of draining cooled water, as will be discussed with reference to figure 5.
  • Figure 3 shows a subsequent phase of an ice-making cycle. In this phase the forming of the ice crusts is completed and the ice has to be released from the outer surfaces of panel 1. Energizing of pump 5 has meanwhile been discontinued, which is expressed in figure 3 by the absence of arrows 23 which designate the flow of water. Valves 13 and 16 are both closed and pump 18 is set into operation, whereby the second heat transfer medium, the flow of which is designated with arrows 24, is able to flow through heating tube 20 in the lower zone of hollow panel 1.
  • the obtained ice can have a very large cold content.
  • the ice By reducing in size or "crushing" the ice it can acquire a substance such that it can be pumped.
  • Figures 3 and 4 show the same operational situation of the device. It is noted that collecting means for collecting, optionally reducing in size and further transporting the ice are not drawn.
  • the drawn form of panel 1 is in principle completely random.
  • the profiled structure has the advantage of an effective enlargement of the surface area, which serves ⁇ '
  • the heat exchanger can be equipped with provisions which enlarge the heat exchanging surface area, such as wires, ribs and the like.
  • a hollow panel can for instance take a form varying from the flat form and have for instance a general tubular form. Such tubes or pipes can be grouped as a bundle.
  • the thermal conduction coefficient of steel for instance stainless steel, is sufficiently high to ensure a good operation of the device according to the invention.
  • the invention also relates to a hollow panel with means for through-flow of a heat transfer medium.
  • This panel is characterized according to the invention by a heating element which is placed in the cavity present in the panel and which can be activated from outside.
  • Figure 6 shows an assembly of two devices of the type shown in figures 1-5.
  • components corresponding with components drawn in figures 1-5 are designated with the same reference numeral as therein, with the understanding that for the left-hand device these reference numerals have an "a” added, while for the right-hand device these reference numerals have a "b" added.
  • compressor 10 and condenser 9 are shared by both devices. It is further noted that several embodiment features, such as water conduit 7, are not drawn in figures 6-10.
  • the assembly comprises a number of controllable valves which can be placed in an open and closed position. In the case of the left-hand device these are suction valve 31, hot gas valve 32 and liquid valve 33; ⁇ in the right-hand device these are suction valve 34, hot gas valve 35 and liquid valve 36, in addition to the communal valve 37.
  • conduits indicated with a single thick line are the conduits which are charged with through-flowing heat transfer medium.
  • Flowing medium is indicated locally with arrows .
  • Figure 7 shows the situation in which hot heat transfer medium flows through heating tube or heat exchanger 20a, while cold heat transfer medium flows through panel lb.
  • the valves 31, 33, 35 and 37 are closed, while valves 32, 34 and 36 are opened.
  • compressor 10 and condenser 9 in co-action provide through-flow of said heat transfer media.
  • a defrosting of panel la takes place, while panel lb is subjected to a freezing process .
  • Figure 8 shows a situation in which valves 31, 32, 33 and 35 are closed, while valves 34, 36, 37 are opened. In this situation defrosting of panel la is complete and only freezing onto panel lb takes place.
  • Figure 10 shows a situation varying from that of figure 8.
  • cold heat transfer medium flows through panel la so that freezing takes place.
  • the right-hand device is wholly passive after heat transfer medium flows through heating tube 20b as according to figure 9.
  • the valves 32, 34 and 35 and 36 are closed, while valves 31, 33 and 37 are open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Dispositif destiné à produire une masse de glace lors de cycles successifs, qui comporte un panneau (1) creux dans lequel peut s'écouler un premier milieu de transfert de chaleur et qui est placé dans une position substantiellement différente de la position horizontale, un moyen provoquant un écoulement d'eau sur au moins une partie de la surface externe du panneau (1) si bien qu'en raison de la traversée du premier milieu de transfert de chaleur à une température inférieure à 0 °C, au moins une partie du liquide coulant sur le panneau gèle et forme une croûte (21) de glace qui adhère à ladite surface externe, et un moyen de chauffe destiné à chauffer ladite surface externe à une température supérieure à 0 °C, si bien que la croûte (21) de glace formée se détache de la surface et glisse vers le bas ou tombe. Ledit moyen de chauffe est caractérisé en ce qu'il comporte un élément de chauffe (20) qui est placé dans la cavité interne du panneau (1) et qui peut être activé depuis l'extérieur.
PCT/NL1998/000552 1997-10-08 1998-09-23 Dispositif de production de glace Ceased WO1999018400A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU91906/98A AU9190698A (en) 1997-10-08 1998-09-23 Device for producing ice

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1007221 1997-10-08
NL1007221A NL1007221C2 (nl) 1997-10-08 1997-10-08 Inrichting voor het maken van ijs.

Publications (1)

Publication Number Publication Date
WO1999018400A1 true WO1999018400A1 (fr) 1999-04-15

Family

ID=19765801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1998/000552 Ceased WO1999018400A1 (fr) 1997-10-08 1998-09-23 Dispositif de production de glace

Country Status (3)

Country Link
AU (1) AU9190698A (fr)
NL (1) NL1007221C2 (fr)
WO (1) WO1999018400A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004045738A3 (fr) * 2002-11-18 2004-09-02 Indian Inst Technology Bombay Systeme de cryoconcentration
WO2012001706A3 (fr) * 2010-06-30 2012-02-16 Indian Institute Of Technology, Bombay Système de concentration par congélation comprenant des échangeurs de chaleur tubulaires
CN103697644A (zh) * 2013-12-11 2014-04-02 广州科勒尔制冷设备有限公司 一种食用冰制冰系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187690A (en) * 1978-08-16 1980-02-12 Gulf & Western Manufacturing Company Ice-maker heat pump
GB1576099A (en) * 1978-05-26 1980-10-01 Finsam Ind Ltd A S Apparatus for producing ice
EP0462679A1 (fr) * 1990-06-21 1991-12-27 S.S.P. Lichtenvoorde B.V. Procédé et dispositif de préparation de glace
DE4338151A1 (de) * 1993-11-03 1994-03-24 Mathias Kambach Verfahren und Gerät zur Herstellung von Eiswürfeln
WO1997034117A1 (fr) * 1996-03-05 1997-09-18 Omega Engineering B.V. Dispositif a faire de la glace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576099A (en) * 1978-05-26 1980-10-01 Finsam Ind Ltd A S Apparatus for producing ice
US4187690A (en) * 1978-08-16 1980-02-12 Gulf & Western Manufacturing Company Ice-maker heat pump
EP0462679A1 (fr) * 1990-06-21 1991-12-27 S.S.P. Lichtenvoorde B.V. Procédé et dispositif de préparation de glace
DE4338151A1 (de) * 1993-11-03 1994-03-24 Mathias Kambach Verfahren und Gerät zur Herstellung von Eiswürfeln
WO1997034117A1 (fr) * 1996-03-05 1997-09-18 Omega Engineering B.V. Dispositif a faire de la glace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004045738A3 (fr) * 2002-11-18 2004-09-02 Indian Inst Technology Bombay Systeme de cryoconcentration
WO2012001706A3 (fr) * 2010-06-30 2012-02-16 Indian Institute Of Technology, Bombay Système de concentration par congélation comprenant des échangeurs de chaleur tubulaires
CN103697644A (zh) * 2013-12-11 2014-04-02 广州科勒尔制冷设备有限公司 一种食用冰制冰系统

Also Published As

Publication number Publication date
AU9190698A (en) 1999-04-27
NL1007221C2 (nl) 1999-04-09

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