JP2013142498A - Refrigerator - Google Patents

Abstract

The present invention provides a refrigerator that achieves both improved heat insulating performance and improved rigidity of a heat insulating wall.
A shelf provided inside the refrigerating chamber 22, a support portion 47 for supporting the edge of the shelf, and a first vacuum heat insulating material 70 provided on a side wall extending between the refrigerating chamber 22 and another storage chamber. And a second vacuum heat insulating material 71 provided on the side wall of the refrigerator compartment 22, and the first vacuum heat insulating material 70 is arranged from the front of the front end portion 47a of the support portion 47 to the rear of the rear end portion 47b. Since the second vacuum heat insulating material 71 is disposed behind the front end portion 47a of the support portion 47, the vacuum heat insulating material having higher rigidity than the foam heat insulating material is doubled in a portion where rigidity is required. Therefore, it is possible to improve both the heat insulating performance and the rigidity of the heat insulating wall.
[Selection] Figure 3

Description

  The present invention relates to a refrigerator to which a vacuum heat insulating material is applied.

  In recent years, as a means of improving the heat insulation performance of a refrigerator, there is a method of using a vacuum heat insulating material having high heat insulation performance. Today, the demand for energy saving is increasing, and it is several times to 10 times that of rigid urethane foam. It can be said that there is an urgent need to improve the heat insulation performance by making maximum use of the vacuum heat insulating material having the heat insulation performance within an appropriate range.

  Under such a background, there is a conventional refrigerator provided with a vacuum heat insulating material (see, for example, Patent Document 1).

  FIG. 7 is a front sectional view of the refrigerator described in Patent Document 1.

  This refrigerator includes a refrigerator main body 1 formed in a box shape and a door (not shown) that opens and closes a front opening of the refrigerator main body. The main body of the refrigerator is provided with a plurality of vacuum heat insulating materials (vacuum heat insulating panels) 2 and 3 in a space constituted by an inner box 1a made of synthetic resin and an outer box 1b made of steel plate covering the inner box 1a. And having a heat insulating wall formed by filling a foam heat insulating material 1c such as hard urethane foam (urethane foam resin).

  In the refrigerator having such a configuration, the amount of heat leakage of the main body 1 of the refrigerator can be reduced to reduce power consumption.

  In addition, there is a refrigerator in which a shelf provided in a storage room is formed integrally with an inner box forming the storage room and supported by a support portion (for example, see Patent Document 2). In the refrigerator having such a configuration, the support portion is filled with the foam heat insulating material 1c, so that the structural strength of the support portion can be further increased.

JP 2006-242439 A JP 2008-051483 A

  On the other hand, the capacity of refrigerators is increasing due to social backgrounds such as the increase in the number of households buying in bulk. In particular, the number of refrigerators designed to increase the capacity has been increasing by suppressing the expansion of the external dimensions and expanding the internal volume due to housing circumstances. For this reason, the heat insulation wall formed between the inner box 1a and the outer box 1b, especially the side wall of the storage room, tends to be thinned.

  For this reason, it is necessary to improve the rigidity of the side wall of the storage chamber having a support portion for supporting a shelf and the like while preventing a decrease in heat insulation performance.

  However, in the refrigerator having the conventional configuration, the main focus is on improving the heat insulating performance, and the rigidity of the heat insulating wall of the support portion has not been considered much. For this reason, when the vibration of the compressor is transmitted to the refrigerator main body, there is a fear that the vibration is transmitted to the shelf or the like via the support portion. In particular, such a fear is likely to occur in a refrigerator in which a compressor is disposed at the top of the refrigerator.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which made the improvement of the heat insulation performance and the rigidity improvement of a heat insulation wall compatible.

  In order to solve the above-described conventional problems, the present invention provides a shelf provided inside a first storage chamber, a support portion that supports an edge of the shelf, the first storage chamber, and the second storage chamber. And a second vacuum heat insulating material provided on the side wall of the first storage chamber, wherein the first vacuum heat insulating material comprises the support portion. The second vacuum heat insulating material is disposed rearward from the front end portion of the support portion.

  Thereby, since the vacuum heat insulating material whose rigidity is higher than that of the foam heat insulating material is doubled in the portion where rigidity is required, it is possible to improve both the heat insulating performance and the rigidity of the heat insulating wall.

  The refrigerator of this invention solves the said conventional subject, and it aims at providing the refrigerator which improved the heat insulation performance and rigidity improvement of the heat insulation wall by appropriate arrangement | positioning of a vacuum heat insulating material.

Schematic front view of the refrigerator in Embodiment 1 of the present invention Schematic cross-sectional view of the refrigerator in Embodiment 1 of the present invention Schematic side view of the refrigerator according to Embodiment 1 of the present invention. Schematic sectional view of the refrigerator in the first embodiment of the present invention. Sectional drawing of the principal part of the refrigerator in Embodiment 1 of this invention Sectional drawing of the vacuum heat insulating material which applied the gas adsorbent of the refrigerator in Embodiment 1 of this invention Schematic side view of the refrigerator in Embodiment 2 of the present invention Rear perspective view of a conventional refrigerator

  1st invention was provided in the side wall over the shelf provided in the inside of the 1st store room, the support part which supports the edge of the shelf, and the 1st store room and the 2nd store room A first vacuum heat insulating material, and a second vacuum heat insulating material provided on a side wall of the first storage chamber, the first vacuum heat insulating material from the front to the rear end of the support portion Since the second vacuum heat insulating material is disposed behind the front end of the support portion, a vacuum heat insulating material having higher rigidity than the foam heat insulating material is provided in a portion where rigidity is required. Due to the double arrangement, it is possible to improve both the heat insulating performance and the rigidity of the heat insulating wall. And it can prevent that the vibration of a compressor transmits a vibration to a shelf via a support part, or generate | occur | produces a noise.

  A second invention is the first invention, further comprising a heat insulating partition wall provided between the first storage chamber and the second storage chamber, wherein the second vacuum heat insulating material is Since it arrange | positions above the upper surface of a heat insulation partition wall, since a 2nd vacuum heat insulating material does not interfere with a heat insulation partition wall, manufacturing cost can be reduced.

  In the third invention, the second vacuum heat insulating material of the first invention has a lower thermal conductivity than the first vacuum heat insulating material, so that the heat insulating performance of the heat insulating wall is improved and the rigidity is improved at a low cost. Can be achieved.

According to a fourth aspect of the present invention, the first vacuum heat insulating material of the first invention is a vacuum heat insulating material in which a gas adsorbing material and a core material are covered with an outer covering material, so that heat insulation is performed in most of the heat insulating wall. Aging deterioration of performance can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. In FIG. 1, a refrigerator 21 is a refrigerator including a double door and includes a plurality of compartments inside the heat insulating box 11.

  Specifically, a quick freezing room 24, a freezing room 25, and a vegetable room 26 that are provided in the refrigerator compartment 22, the ice making room 23, and the ice making room 23 from the upper part and can be quickly frozen are provided.

  At the opening of each storage chamber, for example, a heat insulating door filled with a foam heat insulating material such as hard urethane foam (urethane foam resin) is provided. Specifically, the refrigerator compartment 22 is provided with a first door 31a and a second door 31b that close the opening of the heat insulating box so as to be opened and closed.

  In addition, the ice making room 23, the quick freezing room 24, the freezing room 25, and the vegetable room 26 are drawer-type rooms, and are provided with a drawer-type door 32, a door 33, a door 34, and a door 35, respectively.

  A door decorative plate 36 is attached to the second door 31b along the side opposite to the hinge of the second door 31b, that is, the outer edge of the open end. An operation display means 37 is attached to the door decorative plate 36 from the back side, and the attachment position is a height position that is about the eye level of a general user or worker.

  FIG. 2 is a side sectional view of the refrigerator 21. As shown in FIG. 2, the heat insulating box 11 is a foam heat insulating material that foams and fills a space formed by an inner box 11a obtained by vacuum-forming a resin body such as ABS and an outer box 11b using a metal material such as a pre-coated steel plate. The heat insulation wall comprised by inject | pouring 11c is provided. As the foam heat insulating material 11c, for example, a hard urethane foam, a phenol foam, a styrene foam, or the like is used. As a foaming material for foam filling, it is better to use hydrocarbon-based cyclopentane from the viewpoint of preventing global warming.

  In addition, a vacuum heat insulating material (vacuum heat insulating panel) (not shown) is adhered and adhered to the outer box 11b side using an adhesive member in a space formed by the inner box 11a and the outer box 11b before foaming. .

  Between the refrigerating room 22 and the ice making room 23 or the quick freezing room 24, a first heat insulating partition wall 44 filled with a heat insulating material is provided. A second heat insulating partition wall 45 is provided between the ice making chamber 23 or the quick freezing chamber 24 and the freezing chamber 25. A third heat insulating partition wall 46 is provided between the freezer compartment 25 and the vegetable compartment 26.

  The top surface of the heat insulation box 11 has a shape with a step-like recess provided in the rear direction of the refrigerator 21. A first machine chamber 95 is formed in the step-shaped recess so as to form the compressor 12, moisture A part of the components of the refrigeration cycle circuit such as a dryer (not shown) for removing is housed.

  The left and right sides of the first machine room 95 are covered with part of the side surface of the outer box 11b, and are configured to open the upper side and the back side of the heat insulating box body 11. The opening is covered with a cover (not shown).

The first machine room 95 is formed by biting into the uppermost rear region in the refrigerator compartment 22. By providing a machine room in the rear region of the uppermost part of the refrigeration room 22 that has become a dead space that is difficult to reach, the capacity of the freezer room 25 and the vegetable room 26 can be increased, and storage capacity and Usability can be greatly improved.

  A door pocket 41 is provided as a storage space in the first door 31a and the second door 31b. A plurality of shelves 42 are provided inside the refrigerator compartment 22. The edges on both sides of the shelf 42 are located on the side surfaces of the refrigerator compartment 22 and are supported at least from below by support portions 47 that are convex portions provided integrally with the inner box 11a. The support portions 47 are provided more than the number of the shelves 42, and the user can change the interval between the shelves 42 by appropriately selecting the support portions 47 that support the shelves 42. A storage case 43 is provided at the bottom of the refrigerator compartment 22.

  A rail device 48 for pulling out the storage container together with the door 34 is provided on the side surface of the freezer compartment 25. The storage container 25a is supported on the lower side of the container by a rail device 48. The rail device 48 is fixed to the fixing means 49 with screws or the like through the inner box 11a. The fixing means 49 is a metal plate that is in contact with the inner surface of the inner box 11a and fixed in the foam heat insulating material 11c. The fixing means 49 receives a load applied to the rail device 48 and reinforces the inner box 11a. The fixing means 49 may have a flat plate shape, or may have an L-shaped or U-shaped cross section. Similarly, also on the side surface of the vegetable compartment 26, the rail device 48 is fixed to the fixing means 49.

  On the rear surface of the refrigerator 21, there are provided a cooling chamber 51 for generating cold air, a conveyance air passage 52 for the cold air to each storage chamber, and a back panel 53 for thermally insulating the refrigerator compartment 22 and the conveyance air passage 52. That is, the conveyance air passage 52 is formed between the inner box 11 a of the heat insulating box 11 and the back panel 53. The cooling chamber 51 is provided on the back surface of the freezing chamber 25 and includes an evaporator 54 inside. Between the cooling chamber 51 and the conveyance air path 52, a damper (not shown) for adjusting the amount of cool air passing through the conveyance air path 52 is provided.

  The wall thickness of the foam heat insulating material 11 c on the back surface of the cooling chamber 51 is smaller than the wall thickness of the foam heat insulating material 11 c at a location where the evaporator 54 is not provided in order to accommodate the evaporator 54. The first heat insulating partition wall 44 and the foam heat insulating material 11c on the back surface of the refrigerator compartment 22 are abutted and adhered to each other except for the conveying air passage 52. Further, the third heat insulating partition wall 46 and the foam heat insulating material 11c on the back surface of the refrigerator compartment 22 are abutted and in close contact with each other.

  In the upper space of the evaporator 54, a cooling fan (not shown) for forcing convection of the cool air cooled by the evaporator 54 is disposed, and in the lower space of the evaporator 54, frost that adheres to the evaporator 54 and its surroundings during cooling. A glass tube radiant heater (not shown) for defrosting ice and ice is provided, and a drain pan 55 for receiving defrost water generated at the time of defrosting is further penetrated from the deepest part to the outside of the chamber. A drain tube is arranged. Further, a second machine chamber 96 having a shape with a recess from the back side is formed in the lower part. An evaporating dish 56 is disposed in the second machine chamber 96.

  The refrigerated room 22 is normally set to 1 ° C. to 5 ° C. at the lower limit of the temperature at which it is not frozen for refrigerated storage, and the vegetable room 26 is set to 2 ° C. to 7 ° C., which is set to a temperature that is the same as or slightly higher than the refrigerated room 22 The freezer compartment 25 is set in a minus temperature zone and is usually set at −22 ° C. to −15 ° C. for frozen storage. For example, −30 ° C. and −25 ° C. for improving the frozen storage state. It may be set at a low temperature. The storage case 43 is set as a so-called partial chamber at a temperature setting lower than that of the refrigerating chamber 22 from −4.5 ° C. to −1.5 ° C. The ice making chamber 23 makes ice with an automatic ice maker (not shown) provided in the upper part of the room with water sent from a water storage tank (not shown) in the refrigerated room 22, and an ice storage container ( (Not shown).

  The refrigeration cycle circuit includes a compressor 12, a condensing pipe (not shown) as a condenser, a dryer (not shown) for removing moisture, a capillary 61 as a decompressor, an evaporator 54, and a suction pipe. 62 is connected in a ring shape.

  FIG. 3 is a schematic side view of the refrigerator 21, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is an enlarged view of a main part in the vicinity of one heat insulating wall of the freezer compartment 25. The burying position of a vacuum heat insulating material is demonstrated using these.

  The first vacuum heat insulating material 70 includes a projection portion on the side surface of the heat insulating box 11 of the first machine room 95, and the ice making room 23, the quick freezing room 24, and the freezing room 25, which are the refrigerating room 22 and other storage rooms. Embedded in an area extending over at least one of the vegetable compartments 26. The first vacuum heat insulating material 70 is embedded at a position that does not include a projection portion on the side surface of the heat insulating box 11 of the second machine chamber 96.

  Further, the first vacuum heat insulating material 70 is arranged from the front of the front end portion 47 a of the support portion 47 to the rear of the rear end portion 47 b. In the present invention, when there are a plurality of support portions 47 in one storage chamber, the front end portion of the support portion that is the foremost among the front end portions of the respective support portions 47 is defined as the front end portion 47a. The rear end portion of the rear end portion of the support portion that is the rearmost portion is referred to as a rear end portion 47b.

  The first vacuum heat insulating material 70 is arranged from the front of the front end of the fixing means 49 to the rear of the rear end.

  The second vacuum heat insulating material 71 includes a projection part on the side surface of the heat insulation box 11 of the first machine room 95, and is embedded in the projection part on the side surface of the heat insulation box body 11 of the refrigerator compartment 22. In particular, the first heat insulating partition wall 44 is disposed above the upper surface. In addition, the second vacuum heat insulating material 71 is disposed behind the front end portion 47 a of the support portion 47.

  The third vacuum heat insulating material 72 is embedded in a projected portion on the side surface of the heat insulating box 11 of the freezer compartment 25. That is, it is arranged above the upper surface of the third heat insulating partition wall 46 and below the lower surface of the second heat insulating partition wall 45. In particular, it is disposed above the upper end portion 49 a of the fixing means 49 provided in the freezer compartment 25.

  The fourth vacuum heat insulating material 73 does not include a projection portion on the side surface of the heat insulation box body 11 of the second machine room 96 but is embedded in a projection portion on the side surface of the heat insulation box body 11 of the vegetable chamber 26. That is, it is disposed above the upper end portion 49 a of the fixing means 49 provided in the freezer compartment 25 and below the lower surface of the third heat insulating partition wall 46.

  As shown in FIG. 4, one surface of the first vacuum heat insulating material 70 is disposed in contact with the inner surface of the outer box 11b. In addition, the second vacuum heat insulating material 71 is arranged so that one surface of the second vacuum heat insulating material 71 and the surface facing the outer box 11b of the first vacuum heat insulating material 70 are in contact with each other.

  Further, as shown in FIG. 5, the third vacuum heat insulating material 72 is arranged so that one surface thereof is in contact with one surface of the first vacuum heat insulating material 70. The 3rd vacuum heat insulating material 72 is arrange | positioned so that 80% or more of the projection part to the side surface of the heat insulation box 11 of the freezer compartment 25 may be covered.

Next, the 1st vacuum heat insulating material 70 which is a vacuum heat insulating material provided with the gas adsorption material is demonstrated. As shown in FIG. 6, the first vacuum heat insulating material 70 is a powdered gas adsorbent 137 that is vacuum-sealed in a bag made of a core material 132 containing at least a fiber material and a packaging material 133 having excellent gas barrier properties. Is covered with a jacket material 135 having excellent gas barrier properties, and the jacket material 135 is vacuum-sealed, and then the packaging material 1
This is a vacuum heat insulating material which is formed by opening a hole 33 and communicating the inside of the packaging material with the inside of the jacket material.

  A method for manufacturing the first vacuum heat insulating material 70 will be described. The core material 132 is formed by heating and drying an inorganic fiber aggregate such as glass wool. The jacket material 135 is formed by bonding a vapor deposition layer film and a metal foil layer film. The core material 132 is inserted into the jacket material 135, and the inside is evacuated to seal the opening. Next, the container of the gas adsorbing material 137 is broken down by some method and communicated within the jacket material to further reduce the pressure.

  In the present embodiment, when a hole is made in the packaging material 133 after vacuum-sealing the jacket material 135, the breaking portion 134 provided in the packaging material 133 is encapsulated in the jacket material 135 in advance and vacuum sealed. Later, by applying an external force from the outside of the jacket material 135, the breaking portion 134 is broken and a hole is made in the packaging material 133.

  Thus, in the state where the hole is opened, the internal space of the jacket material 135 and the gas adsorbent 137 communicate with each other, and the gas remaining in the internal space of the jacket material 135 is further adsorbed, The degree of vacuum can be improved.

  The gas adsorbent 137 is capable of adsorbing a non-condensable gas contained in the gas, and an alkali metal or alkaline earth metal oxide, an alkali metal or alkaline earth metal hydroxide, or the like is used. In particular, there are lithium oxide, lithium hydroxide, barium oxide, barium hydroxide and the like. Accordingly, nitrogen having approximately 75% in the air can be adsorbed at room temperature, so that a high degree of vacuum can be obtained.

  In particular, the gas adsorbent 137 is desirably provided with an adsorbent made of ZSM-5 type zeolite as a powder having a large surface area. Further, among ZSM-5 type zeolites, in order to improve nitrogen adsorption characteristics at room temperature, more preferably, at least 1/2 or more of copper sites of ZSM-5 type zeolite are copper monovalent sites. The adsorbent is characterized in that at least ½ or more of the copper monovalent sites are oxygen tricoordinate copper monovalent sites. By providing a gas adsorbent with an increased rate of oxygen tricoordinated copper monovalent sites in this way, the amount of air adsorbed can be greatly improved.

  The fiber aggregate is an aggregate composed only of fibers, and may be molded with a binder, acid, heat, or the like.

  The vapor deposition layer film is a composite plastic film in which an aluminum vapor deposition film is sandwiched between a nylon film and a high density polyethylene film, and the metal foil layer film is a composite plastic film in which an aluminum foil is sandwiched between a nylon film and a high density polyethylene film. .

  Moreover, the sealing surface of a vapor deposition layer film and a metal foil layer film makes the vapor deposition layer film side into one plane shape, and comprises the surface on the metal foil layer film side in three dimensions. And the vapor deposition layer film side is arrange | positioned in contact with the outer box 11b.

  The packaging material 133 having excellent gas barrier properties is preferably a film or sheet-like member that is hardly permeable to gas and capable of making bags. For example, a film in which a polypropylene film, an aluminum foil, and a low density polyethylene are laminated in this order can be used.

Further, as the packaging material 133, the gas adsorbing material 137 is wrapped so as to be independent from the surrounding space, and there are a bag, a pillow bag, a gusset bag and the like which are heat-sealed in four directions. Further, the gas permeability is preferably 10 ⁴ [cm ³ / m ² · day · atm] or less, and more preferably 10 ³ [cm ³ / m ² · day · atm] or less.

  The breaking portion 134 is formed of a material that is more brittle and fragile than the packaging material 133, such as glass, and functions as a sealing portion that seals the gas adsorbent inside the packaging material 133. By forming it with an easy material, it is possible to reliably form a through hole as a through portion in the packaging material 133.

The outer jacket material 135 having excellent gas barrier properties encloses the core material 132, the packaging material 133, the gas adsorbing material 137, and the destruction portion 134, thereby making it independent from the surrounding space. Further, the gas permeability is preferably 10 ⁴ [cm ³ / m ² · day · atm] or less, and more preferably 10 ³ [cm ³ / m ² · day · atm] or less.

  In this embodiment, as a method for opening a hole, the destruction portion 134 formed at the end portion also serving as a sealing portion is used. However, the destruction portion 134 is, for example, a portion having a low rigidity of the packaging material 133 or a sealing portion. It is only necessary that the packaging material 133 can be destroyed by an external force after the envelope material 135 is vacuum-sealed. In the above description, the term “communication” means that the space separated between the inside of the packaging material and the outside of the packaging material is made into a continuous space.

  Next, the second vacuum heat insulating material 71, the third vacuum heat insulating material 72, and the fourth vacuum heat insulating material 73 will be described only with respect to differences from the first vacuum heat insulating material 70. The first difference is that the gas adsorbent 137 is not provided. The second difference is that the outer cover material 135 of the first vacuum heat insulating material 70 is provided with a vapor deposition layer film and a metal foil layer film, whereas the second vacuum heat insulating material 71, The 3rd vacuum heat insulating material 72 and the 4th vacuum heat insulating material 73 are points which are not provided with a metal foil layer film and are comprised with the vapor deposition layer film.

  Since the second vacuum heat insulating material 71, the third vacuum heat insulating material 72, and the fourth vacuum heat insulating material 73 do not include the gas adsorbing material 137, the solid heat conductivity of the vacuum heat insulating material itself is the first vacuum. It is inferior to the heat insulating material 70. However, since the configuration is simplified, a low-cost vacuum heat insulating material can be obtained. Moreover, since the 2nd vacuum heat insulating material 71, the 3rd vacuum heat insulating material 72, and the 4th vacuum heat insulating material 73 are not provided with the vapor deposition layer film with low heat conductivity, the solid heat conductivity of vacuum heat insulating material itself. Is inferior to the first vacuum heat insulating material 70. However, since the vapor deposition layer film having a low gas barrier property is not provided, the heat transfer performance and the rigidity can be reliably maintained over a long period of time.

  The gas adsorbent 137 provided on the first vacuum heat insulating material 70 has a second vacuum heat insulating material 71 and a third vacuum heat insulating material 72 among the surfaces of the first vacuum heat insulating material 70 that do not contact the outer box 11b. The fourth vacuum heat insulating material 73 is provided at a position other than the place where the fourth vacuum heat insulating material 73 is provided.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the operation of the refrigeration cycle will be described. The refrigeration cycle is operated by a signal from a control board (not shown) according to the set temperature in the cabinet, and the cooling operation is performed. Due to the operation of the compressor 12, the high-temperature and high-pressure refrigerant discharged from the discharge pipe 140 is condensed and liquefied by the condensing pipe 57 and reaches the capillary 61. After that, the capillary 61 is depressurized while exchanging heat with the refrigerant flowing through the suction pipe 62 to become a low-temperature and low-pressure liquid refrigerant and reach the evaporator 54. In the evaporator 54, the low-temperature and low-pressure liquid refrigerant exchanges heat with air by the operation of a cooling fan (not shown), and evaporates. The evaporated and evaporated refrigerant flows through the suction pipe 62, exchanges heat with the refrigerant flowing through the capillary 61, passes through the suction pipe 141, and is sucked into the compressor 12 again.

In the cooling chamber 51, cold air for cooling a plurality of compartments in the heat insulating box 11 is generated. The generated cold air is sent to each storage room. For example, it is sent to the refrigerator compartment 22 through the conveyance air passage 52 via a damper (not shown). Alternatively, it is sent to the storage case 43 through the conveying air passage 52 via another damper (not shown). Thereby, the cooling of each storage chamber is controlled to a predetermined temperature.

  Each storage chamber can be kept at a predetermined temperature for a long time by being insulated by the foam heat insulating material 11 c and the first vacuum heat insulating material 70.

  Further, in the present embodiment, the first vacuum heat insulating material 70 includes a projection portion on the side surface of the heat insulating box 11 of the first machine room 95, and is embedded in an area extending from the refrigerator compartment 22 to another storage room. Therefore, the heat insulation performance of the entire refrigerator 21 can be improved. Furthermore, since the first vacuum heat insulating material is provided with the gas adsorbing material 137, the residual gas inside the jacket material 135 can be further adsorbed, so that the degree of vacuum can be further improved and the heat insulating performance can be improved. Aging deterioration can be prevented.

  Further, the second vacuum heat insulating material 71 is arranged behind the front end portion 47 a of the support portion 47 with respect to the first vacuum heat insulating material 70 extending from the front side to the rear end portion 47 b of the support portion 47. As a result, the rigidity of the rear portion of the tip portion 47a of the support portion 47 that receives the load of the stored items placed on the shelf 42 can be increased as compared with other portions, so that the heat insulation wall as a whole has a uniform rigidity, The vibration of the compressor 12 can be prevented from being transmitted to the shelf 42 via the support portion 47 and the rattling sound being generated from the shelf 42.

  Furthermore, by arranging the second vacuum heat insulating material 71 in close contact with the first vacuum heat insulating material 70, the vacuum heat insulating material is doubled, and the heat insulating performance of the heat insulating wall is improved and the rigidity is improved. Can be achieved.

  Further, since the second vacuum heat insulating material 71 is disposed above the upper surface of the first heat insulating partition wall 44, the second vacuum heat insulating material 71 does not interfere with the first heat insulating partition wall 44. Therefore, since it is not necessary to provide a recess in the second vacuum heat insulating material 71 to avoid interference, the manufacturing cost of the refrigerator 21 can be reduced.

  Or the 3rd vacuum heat insulating material 72 and the 4th vacuum heat insulating material 73 are arrange | positioned above the upper end part 49a of the fixing means 49 of the storage chamber in which each was provided, and thereby the fixing means 49 or the inner box 11a. Therefore, it is not necessary to avoid the interference by providing a recess in the third vacuum heat insulating material 72 or the fourth vacuum heat insulating material 73, so that the interference of the refrigerator 21 can be avoided. Manufacturing cost can be reduced. In addition, since the rigidity of the entire heat insulating wall is maintained, the vibration of the compressor 12 is transmitted to the rail device 48 and the storage container via the fixing means 49, and rattling sound is generated from the rail device 48 and the storage container. Can be prevented.

  The first vacuum heat insulating material 70 is a vacuum heat insulating material provided with the gas adsorbing material 137 and maintaining high thermal conductivity over a long period of time, while the second vacuum heat insulating material 71 used for securing the rigidity of the heat insulating wall. The third vacuum heat insulating material 72 and the fourth vacuum heat insulating material 73 are made of a vacuum heat insulating material having a relatively low thermal conductivity that does not include the gas adsorbing material 137, thereby improving the heat insulating performance of the heat insulating wall at low cost. And improved rigidity.

  The gas adsorbing material 137 provided on the first vacuum heat insulating material 70 is a surface that does not contact the outer box 11b of the first vacuum heat insulating material 70, and is a second vacuum heat insulating material 71, a third vacuum heat insulating material. 72, since the fourth vacuum heat insulating material 73 is provided at a position other than the position where the fourth vacuum heat insulating material 73 is provided, even if the gas adsorbing material 137 protrudes from the first vacuum heat insulating material 70, the second vacuum heat insulating material is provided. Since it does not interfere with the material 71, the third vacuum heat insulating material 72, and the fourth vacuum heat insulating material 73, the first vacuum heat insulating material 70, the second vacuum heat insulating material 71, and the third vacuum heat insulating material can be easily obtained. The material 72 and the fourth vacuum heat insulating material 73 can be brought into close contact with each other.

(Embodiment 2)
FIG. 7 is a schematic side view of the refrigerator 21 showing the arrangement of the vacuum heat insulating material in the second embodiment of the present invention. In the present embodiment, the description of the same configuration as that described in the first embodiment will be omitted, and only the differences from the first embodiment will be described.

  In the present embodiment, the second heat insulating partition wall 45 is omitted because there is almost no temperature difference between the ice making chamber 23, the quick freezing chamber 24 and the freezing chamber 25.

  And the 3rd vacuum heat insulating material 72 is embed | buried under the projection part to the side surface of the heat insulation box 11 of the freezer compartment 25, the ice making chamber 23, and the quick freezer compartment 24, as shown in FIG. That is, it is disposed above the upper surface of the third heat insulating partition wall 46 and below the lower surface of the first heat insulating partition wall 44. And the 3rd vacuum heat insulating material 72 covers 80% or more of the projection part to the side surface of the heat insulation box 11 of the space between the 1st heat insulation partition wall 44 and the 3rd heat insulation partition wall 46. As shown in FIG. Has been placed.

  In the present embodiment, the first vacuum heat insulating material 70 includes a projection portion on the side surface of the heat insulating box 11 of the first machine room 95, and is embedded in a region extending from the refrigerator compartment 22 to another storage room. Therefore, the heat insulation performance of the entire refrigerator 21 can be improved. Furthermore, since the first vacuum heat insulating material 70 includes the gas adsorbing material 137, the residual gas inside the jacket material 135 can be further adsorbed, so that the degree of vacuum can be further improved and the heat insulating performance can be improved. Can prevent deterioration over time.

  Also in the present embodiment, as in the first embodiment, it is possible to improve both the heat insulating performance and the rigidity of the heat insulating wall at low cost.

  In the above embodiment, the compressor 12 has been described as being disposed in the first machine chamber 95 provided behind the top surface of the heat insulating box 11 and located above the evaporator 54. However, the compressor 12 may be provided behind the bottom surface 98 of the heat insulating box 11 and located below the evaporator 54.

  Further, one surface of the first vacuum heat insulating material 70 is in contact with the inner surface of the outer box 11b of the heat insulating box 11, but may be in contact with the inner surface of the inner box 11a of the heat insulating box 11.

  In addition, using flow control means such as an electric three-way valve in the refrigeration cycle circuit, it is possible to use multiple evaporators according to the configuration of the compartments and temperature settings, switch between multiple capillaries, and compress Further energy saving can be achieved by cutting the gas while the machine 12 is stopped.

  As described above, the refrigerator according to the present invention can achieve both the improvement of the heat insulating performance and the rigidity of the heat insulating wall, and can be applied to cooling devices other than the refrigerator.

2, 3 Vacuum insulation 1a, 11a Inner box 1b, 11b Outer box 1c, 11c Foam insulation 11 Heat insulation box 12 Compressor 21 Refrigerator 22 Refrigeration room 23 Ice making room 24 Quick freezer room 25 Freezer room 26 Vegetable room 31a 1st Door 31b second door 32, 33, 34, 35 door 36 door decorative plate 37 operation display means 41 door pocket 42 shelf 43 storage case 44 first heat insulation partition wall 45 second heat insulation partition wall 46 third heat insulation Partition wall 47 Support portion 47a Front end portion 47b Rear end portion 48 Rail device 49 Fixing means 49a Upper end portion 51 Cooling chamber 52 Carrying air passage 53 Back panel 54 Evaporator 55 Drain pan 56 Evaporating dish 57 Condensation pipe 61 Capillary tube 62 Suction pipe 70 First Vacuum heat insulating material 71 second vacuum heat insulating material 72 third vacuum heat insulating material 73 fourth vacuum heat insulating material 95 first machine chamber 96 first Machine room 132 core 133 packaging material 135 enveloping member 134 destroyed 137 gas adsorber 491 screws

Claims (4)

A shelf provided inside the first storage chamber, a support portion that supports an edge of the shelf, and a first vacuum heat insulating material provided on a side wall extending between the first storage chamber and the second storage chamber And a second vacuum heat insulating material provided on the side wall of the first storage chamber, and the first vacuum heat insulating material is disposed from the front of the front end portion of the support portion to the rear of the rear end portion. And the said 2nd vacuum heat insulating material is arrange | positioned back from the front-end | tip part of the said support part, The refrigerator characterized by the above-mentioned. A heat insulating partition wall provided between the first storage chamber and the second storage chamber is provided, and the second vacuum heat insulating material is disposed above the upper surface of the heat insulating partition wall. The refrigerator according to claim 1. The refrigerator according to claim 1, wherein the second vacuum heat insulating material has a lower thermal conductivity than the first vacuum heat insulating material. The refrigerator according to claim 1, wherein the first vacuum heat insulating material is a vacuum heat insulating material in which a gas adsorbing material and a core material are covered with an outer cover material.