JP2014134283A - Vacuum heat insulation material and refrigerator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material which can be provided in an inside of a storage at a turning portion of a heat radiation pipe, when a groove portion for arrangement of the heat radiation pipe is provided linearly along the vertical direction and the heat radiation pipe is provided meandering vertically.SOLUTION: A first groove portion 104 and a second groove portion 105 provided on a surface of the vacuum heat insulation material 103 are crossed, and the grooves are provided in ends in the vertical and the horizontal direction. The second groove portion 105 is groove-shaped by roll press and is provided not adjacent to a thermal weld portion 100.

Description

  The present invention relates to a refrigerator using a vacuum heat insulating material and a vacuum heat insulating material.

  In recent years, there has been an active movement to promote energy conservation as a countermeasure against global warming, which is a global environmental problem. With regard to equipment that uses heat and cold energy, a vacuum insulation material with excellent heat insulation performance from the viewpoint of effective use of heat. Is spreading.

  Vacuum insulation is a bag-like gas barrier film that contains a core material with a high gas phase volume ratio and a fine gap, such as glass wool, and the core material storage space is decompressed and sealed. It is a thing.

  Vacuum insulation materials have lower thermal conductivity than other insulation materials such as urethane foam and glass wool, and are especially applied to the walls of refrigerators that require high thermal insulation. In order to increase the effect, the thickness tends to increase.

  In addition, in order to efficiently dissipate the heat generated in the refrigerator's refrigeration cycle, a heat-dissipating pipe is attached to the inside of the outer box that forms the outer surface of the refrigerator, and this heat-dissipating pipe is covered with a vacuum heat insulating material, and the refrigerator is made of foamed urethane or the like. The space created between the inner box and the inner box is filled, making it difficult to transfer heat from the outside of the refrigerator to the inner side.

  However, simply placing a flat vacuum heat insulating material on the heat radiating pipe creates a space surrounded by the outer box of the refrigerator, the heat radiating pipe, and the vacuum heat insulating material, which makes it impossible to fill urethane foam. By stacking the vacuum heat insulating material, the space between the inner box and the outer box of the refrigerator, that is, for the refrigerator, the wall thickness must be increased and the internal volume must be reduced.

  Therefore, in order to solve the above problem, it has been proposed to provide a groove in the vacuum heat insulating material (for example, see Patent Document 1).

  FIG. 6 is a perspective view of a conventional vacuum heat insulating material disclosed in Patent Document 1. As shown in FIG. As shown in FIG. 6, the conventional vacuum heat insulating material 1 is provided with a groove 2 into which a heat radiating pipe is fitted on one side, so that the vacuum heat insulating material 1 covers the heat radiating pipe and can be reduced in thickness so that the heat insulating performance is good. And the wall thickness of a refrigerator can be made thin.

JP 2008-64323 A

  However, in the refrigerator in which the vacuum heat insulating material is provided inside the heat radiating pipe, the groove portion for arranging the heat radiating pipe provided in the vacuum heat insulating material is provided in a straight line along the vertical direction. If it is arranged meandering up and down, a vacuum heat insulating material cannot be provided inside the folded portion of the folded portion of the heat radiating pipe, and it is not possible to further improve the heat insulating performance by increasing the coating area of the vacuum heat insulating material Had.

  The present invention solves the above-described conventional problems, and can be arranged in the inside of the folded portion of the heat radiating pipe without protruding the heat radiating pipe, thereby further improving the heat insulation performance. It aims at providing a heat insulating material and a refrigerator using the same.

  In order to solve the above-described conventional problems, the vacuum heat insulating material of the present invention is a plate-like material in which a core material is covered with a gas barrier film, the periphery of the film is sealed with a heat welding portion, and the inside is decompressed and sealed. A first groove part having a groove formed in the longitudinal direction on a surface of a member (vacuum heat insulating material) and a second groove part having a groove formed in a short direction are formed. The first groove part and the second groove part Are formed so as to cross each other at least on a plate-like surface, the second groove portion is roll press molded, and the second groove portion is provided at a position not adjacent to the heat welded portion.

  The refrigerator according to the present invention includes a heat insulating box body filled with a foam heat insulating material between the outer box and the inner box, a heat radiating pipe disposed inside the outer box, and a heat radiating pipe inside the refrigerator. The vacuum heat insulating material is a plate-like member (vacuum insulating material) that covers the core material with a gas barrier film, seals the periphery of the film with a heat welded portion, and decompresses and seals the inside. A first groove portion having a groove formed in the longitudinal direction on the surface of the heat insulating material) and a second groove portion having a groove formed in the short side direction, wherein the first groove portion and the second groove portion are at least Formed so as to cross each other on a plate-like surface, the second groove portion is roll press molded, and the second groove portion is provided at a position not adjacent to the heat welded portion, the first groove portion, the second groove portion A heat radiating pipe is arranged in the.

  With the above configuration, the heat radiating pipe can be disposed inside the folded portion without protruding the heat radiating pipe, and in the refrigerator in which the heat radiating pipe meanders up and down inside the outer box, the heat radiating pipe A vacuum heat insulating material can be disposed on the inner side of the folded portion of the heat radiating pipe without protruding.

  Further, the upper and lower second groove portions are formed by roll press forming, and unlike mechanical press forming, there is a degree of freedom, and it is possible to respond even if the position of the second groove portion changes.

  Further, in mechanical press molding, the gas barrier film may be damaged by the press pressure. However, roll press molding has a small roll pressure applied to the gas barrier film 102, and thus has little influence on the gas barrier film. It's hard to get up.

  The vacuum heat insulating material of this invention and the refrigerator using the same can improve the further heat insulation performance. Moreover, the freedom degree of the position of a 2nd groove part can be raised, and generation | occurrence | production of the damage of a gas barrier film can be reduced.

The perspective view of the refrigerator by Embodiment 1 of this invention Side surface sectional drawing explaining the refrigerator by Embodiment 1 of this invention Side surface sectional drawing explaining the refrigerator by Embodiment 1 of this invention The top view of the vacuum heat insulating material used for the refrigerator by Embodiment 1 of this invention 1 is a cross-sectional view taken along line A-A ′ in FIG. 1 for explaining the refrigerator according to the first embodiment of the present invention. A perspective view showing a conventional vacuum heat insulating material

In the first invention, the core material is covered with a gas barrier film, the periphery of the film is sealed with a heat-welded portion, and the inside thereof is decompressed and sealed on the surface of a plate-like member (vacuum heat insulating material) in the longitudinal direction. A first groove portion having a formed groove and a second groove portion having a groove formed in a short direction are formed, and the first groove portion and the second groove portion cross each other at least on a plate-like surface. The second groove is formed by roll press molding, and the second groove is provided at a position not adjacent to the heat welded part.

  Thereby, in the refrigerator in which the vacuum heat insulating material is provided on the inner side of the heat radiating pipe, the heat radiating pipe can be disposed on the inner side of the folded portion without protruding the heat radiating pipe, thereby further improving the heat insulating performance. In addition, the strength of the upper and lower end portions of the vacuum heat insulating material can be improved and the warpage, deformation, etc. of the vacuum heat insulating material can be suppressed by arranging the second groove portion to the upper and lower end portions of the vacuum heat insulating material. The attachment to the refrigerator becomes easy and the man-hour can be reduced.

  Further, the upper and lower second groove portions are formed by roll press forming, and unlike mechanical press forming, there is a degree of freedom, and it is possible to respond even if the position of the second groove portion changes.

  Further, in mechanical press molding, the gas barrier film may be damaged by the press pressure. However, roll press molding has a small roll pressure applied to the gas barrier film 102, and thus has little influence on the gas barrier film. It's hard to get up.

  According to a second aspect, in the first aspect, the number of the first groove portions is greater than the number of the second groove portions, so that the length of the heat radiating pipe can be easily set according to the required performance of the refrigerator. It becomes.

  According to a third aspect, in the first or second aspect, the width of the groove of the second groove is wider than the width of the first groove, so that the bending R of the folded portion of the radiating pipe to be buried can be designed to be large. This makes it possible to ensure the reliability of the heat radiating pipe.

  According to a fourth aspect of the present invention, the vacuum heat insulating material according to any one of the first to third aspects, a heat insulating box body filled with a foam heat insulating material between the outer box and the inner box, and disposed inside the outer box. In the refrigerator provided with the heat radiating pipe and the vacuum heat insulating material disposed inside the heat radiating pipe, the heat radiating pipe is disposed in the first groove portion and the second groove portion, thereby providing a vacuum. The heat insulating material can be attached with a high coverage, and further heat insulating performance can be improved.

  Hereinafter, embodiments of a vacuum heat insulating material and a refrigerator using the same according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of a refrigerator according to Embodiment 1 of the present invention. 2 and 3 are side sectional views of the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is a plan view of a vacuum heat insulating material used in the refrigerator according to Embodiment 1 of the present invention. 5 is a cross-sectional view of the refrigerator according to the first embodiment of the present invention, taken along the line AA ′ of FIG.

As shown in FIG. 1 and FIG. 2, the refrigerator 112 includes a metal outer box 107 and a hard resin inner box 108 that open forward, and a foam insulation that is foam-filled between the outer box 107 and the inner box 108. In the heat insulation box 110 made of the material 109, a refrigeration chamber 113 provided in the upper part of the main body, a switching chamber 114 provided under the refrigeration chamber and capable of switching a temperature zone, an ice making chamber 115, and a vegetable chamber 116 It is composed of a freezer compartment 117 provided therebetween. There is a cooling chamber on the back of the refrigerator 112, which includes a cooler 118 that generates cool air and a cool air blower fan 119 that supplies the cool air to each chamber, a temperature detection sensor (not shown) in the cabinet, a damper, and the like The inside temperature is controlled by (not shown). Further, a defrosting means (not shown) is installed below the cooler 118. The cooler 118 is made of aluminum or copper.

  The refrigerator 112 encloses a refrigerant in a refrigeration cycle in which a compressor 120, a condenser (not shown), a heat radiating pipe 111, a capillary tube 121, and a cooler 118 are sequentially connected in an annular shape. Cooling operation is performed.

  On the back and side surfaces of the refrigerator 112, heat radiating pipes 111 are disposed, and a heat radiating length is secured by bending one pipe into, for example, a U-shape, inside the outer box 107 inside. It is pasted.

  As shown in FIGS. 3, 4, and 5, a vacuum heat insulating material 103 is attached to a heat radiating pipe 111 provided on the side of the refrigerator.

  Specifically, the outer box 107 is held in close contact with the hot box or aluminum foil having good thermal conductivity so that the outer box 107 can conduct heat well. The heat radiating pipe 111 extends in the vertical direction, bends at the upper and lower ends and snakes up and down, and the refrigerant flowing from the condenser radiates heat, thereby preventing dew on the side surface of the outer box 107.

  The vacuum heat insulating material 103 is formed in a rectangular plate shape according to the shape of the outer box, specifically, a rectangular plate shape having a long side corresponding to the vertical direction of the refrigerator 112.

  As shown in FIG. 5, the vacuum heat insulating material 103 is a plate-like member in which the core material 101 is covered with a gas barrier film 102 and the inside thereof is decompressed and sealed.

  In addition, the fin part (not shown) of the gas-barrier film 102 which pressure-reduced and heat-welded and remained exists around the vacuum heat insulating material 103. FIG.

  Note that the heat-welded portion 100 is a gas barrier film 102 that is a jacket material constituting the vacuum heat insulating material, which is welded to the gas barrier film 102 that is a facing jacket material by heat. The heat welded portion 100 is provided around the gas barrier film 102.

  Here, the vacuum heat insulating material 103 has a first groove portion 104 and a second groove portion 105 in which the heat radiating pipe 111 is installed, and the first groove portion 104 is the longitudinal direction of the vacuum heat insulating material 103 (that is, the vertical direction of the refrigerator). , And the first and second grooves 104 are arranged in parallel with each other at intervals in the present embodiment.

  The second groove 105 is a concave groove formed up to the left and right ends of the vacuum heat insulating material 103 along the short direction of the vacuum heat insulating material 103 (that is, the front-rear direction of the refrigerator). The first groove portion 104 and the second groove portion 105 are formed so as to cross each other.

  On the bottom surfaces of the upper and lower second groove portions 105, folded portions (bent portions) that are bent at the upper and lower ends of the heat radiating pipe 111 are arranged.

  Here, in the present embodiment, the upper and lower end portions 106 and the left and right end portions of the vacuum heat insulating material 103 are portions excluding the heat welding portion and the fin portion, and the end portions of the portions where the core material 101 exists. Define.

Further, either one of the upper and lower grooves of the second groove 105 (in this embodiment, the lower second groove 105) is connected to the introduction groove 122 of the heat radiating pipe 111.

  The upper and lower second groove portions 105 are formed by roll press molding, and the upper and lower second groove portions 105 are provided at positions not adjacent to the heat welded portion 100.

  In the roll press molding, a cylindrical metallic mold is used for transfer to form grooves.

  Here, the second groove portion 105 being provided at a position not adjacent to the heat welded portion 100 means that the second groove portion 105 and the heat welded portion 100 are arranged at a predetermined interval. To do.

  The heat radiating pipe 111 is introduced from the peripheral edge of the vacuum heat insulating material 103 through the introduction groove 122 of the heat radiating pipe 111 into the second groove portion 105, a linear portion is disposed in the first groove portion 104, and the bottom surface of the second groove portion 105. The bent portion is disposed on the second groove portion 105 so as to pass through the outlet groove 123 of the heat radiation pipe 111 of the first groove portion 104 formed on the upper portion of the second groove portion 105.

  Thereby, almost the entire heat radiating pipe 111 meandering up and down is arranged between the vacuum heat insulating material and the outer box side plate without jumping out from the upper and lower end portions 106 of the vacuum heat insulating material 103.

  In the present embodiment, the width of the first groove 104 is 20 mm.

  In the present embodiment, the upper second groove 105 has a width of 80 mm.

  In the present embodiment, the width of the lower second groove 105 is 60 mm.

  In particular, the width of the second groove 105 is set according to the number of the heat radiating pipes 111 provided in the second groove, the bending dimensions in the manufacturing process of the heat radiating pipes 111, and the like.

  In the present embodiment, the number of first groove portions 104 is three.

  In the present embodiment, the number of second groove portions 105 is two.

  In particular, the number of the first groove portions 104 is set according to the length of the heat radiating pipe 111 according to the required performance of the refrigerator 112.

  The vacuum heat insulating material 103 as described above is manufactured as follows in the present embodiment.

  First, the first groove portion 104 and the second groove portion 105 are formed by tightly sealing the end portion of the gas barrier film 102 while the inside of the gas barrier film 102 containing the core material 101 is evacuated. A plate-like vacuum heat insulating material 103 is formed.

  Thereafter, a molding process for the first groove 104 is performed, and then a molding process for the second groove 105 is performed.

  In the present embodiment, the first groove 104 is formed by roll press molding.

  Next, cooling of the refrigerator will be described.

When the internal temperature rises and a freezer compartment sensor (not shown) reaches or exceeds the starting temperature, the compressor 120 is started and cooling is started. While the high-temperature and high-pressure refrigerant discharged from the compressor 120 finally reaches a dryer (not shown) disposed in the machine chamber 124, particularly in the heat radiation pipe 111 installed in the outer box 107, the outer box 107. It is cooled and liquefied by heat exchange with the air outside and the foamed heat insulating material 109 inside.

  Next, the liquefied refrigerant is depressurized by the capillary tube 121, flows into the cooler 118, and exchanges heat with the internal air around the cooler 118. The cold air that has been heat-exchanged is blown into the cabinet by a nearby cool air blower fan 119 to cool the inside of the cabinet. Thereafter, the refrigerant is heated and gasified, and returns to the compressor 120. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor 120 is stopped.

  The operation and action of the refrigerator configured as described above and the vacuum heat insulating material attached to the refrigerator will be described below.

  Conventionally, the bent position of the heat radiating pipe 111 affixed to the side surface of the refrigerator body is the vegetable compartment, and for the reason of ensuring the reliability of the vacuum heat insulating material 103, the groove for installing the heat radiating pipe 111 has a bent shape other than a straight line. Since it is difficult to create, the vacuum heat insulating material 103 can be pasted only to the vicinity of the bent portion of the heat radiating pipe 111.

  Therefore, since the covering rate of the vacuum heat insulating material 103 cannot be increased, the refrigerator cross-sectional wall has to be thickened to reduce the intrusion heat, and the internal capacity has to be reduced.

  Therefore, in the present embodiment, the upper and lower end portions 106 of the vacuum heat insulating material 103 are extended from the end portion of the inner box 108 by forming the second groove portion 105 in the folded portion (bent portion) of the heat radiating pipe 111 on the side surface of the refrigerator. It becomes possible, and it can stick with a high coverage.

  Furthermore, the width of the second groove portion 105 is wider than the width of the first groove portion 104, so that the bent portion R of the folded portion of the heat radiating pipe 111 can be designed to be large. Generation | occurrence | production of buckling etc. will be suppressed and the reliability of the thermal radiation pipe 111 will be securable.

  Moreover, in this Embodiment, the freedom degree of piping design of the thermal radiation pipe 111 can be improved.

  The upper and lower second groove portions 105 are formed by roll press forming. Unlike mechanical press forming, a movable roll press device is used to place the second groove portion at the place where the second groove portion is disposed. There is a degree of freedom, and even if the position of the second groove portion 105 changes, it can be easily handled.

  In mechanical press molding, the gas barrier film 102 may be damaged by the press pressure. In roll press molding, since the roll pressure applied to the gas barrier film 102 is small, the influence on the gas barrier film 102 is small. Damage is unlikely to occur.

  Further, when the second groove portion 105 is adjacent to the heat welded portion 100, an appearance abnormality is likely to occur in the heat welded portion 100.

  However, since the upper and lower second groove portions 105 are provided at positions that are not adjacent to the heat welded portion 100 as in the present embodiment, appearance abnormalities such as poor seals and wrinkle failures are unlikely to occur in the heat welded portion 100.

  The mechanical press molding is to press the mold using air pressure or hydraulic pressure to form a groove.

  The number of roll presses in roll press molding is determined in consideration of the degree of damage to the gas barrier film 102 and the depth of processing of the second groove.

  For example, by making the number of roll presses a plurality of times, the pressure is dispersed, damage to the gas barrier film 102 can be suppressed, and the processing depth of the second groove can be maintained at a predetermined dimension.

  As described above, in the present embodiment, the core material 101 is covered with the gas barrier film 102, and the inside of the plate-like vacuum heat insulating material 103 whose pressure is reduced and sealed has a groove formed in the longitudinal direction. A second groove portion 105 having a groove portion 104 and a groove formed in a short direction is formed up to the upper, lower, left and right end portions of the vacuum heat insulating material 103. Further, the first groove 104 and the second groove 105 are the refrigerator 112 that is formed so as to cross each other at least on the plate-like surface, and the vacuum heat insulating material 103 is provided inside the heat radiating pipe 111.

  Thereby, the vacuum heat insulating material can be disposed not only in the straight portion of the heat radiating pipe 111 but also inside the folded portion of the heat radiating pipe 111 without projecting the heat radiating pipe 111, thereby further improving the heat insulating performance. Can do.

  Further, the upper and lower end portions of the vacuum heat insulating material 103 are formed by forming the grooves by roll press molding, disposing the second heat insulating portion up to the upper and lower end portions of the vacuum heat insulating material, and providing them at positions not adjacent to the heat welded portion 100. 106, the strength of the upper and lower end portions 106 of the vacuum heat insulating material 103 is improved, warpage, deformation and the like of the vacuum heat insulating material 103 can be suppressed, and the attachment to the refrigerator 112 becomes easy. Manufacturing man-hours can be reduced.

  Moreover, it is possible to easily set the length of the heat radiating pipe 111 according to the required performance of the refrigerator 112 by being formed in a rectangular shape and having the number of the first groove portions 104 larger than the number of the second groove portions 105. Become.

  Furthermore, since the second groove 105 is formed in a rectangular shape and the width of the second groove 105 is wider than that of the first groove 104, it is possible to design a large bending R of the folded portion of the heat radiating pipe 111 to be buried. It is possible to ensure reliability.

  As described above, the vacuum heat insulating material according to the present invention includes the first groove portion having the groove formed in the longitudinal direction on the surface of the plate-like member (vacuum heat insulating material) and the second groove having the groove formed in the short direction. The first groove portion and the second groove portion are formed so as to cross each other at least on a plate-like surface, the second groove portion is roll press molded, and the second groove portion is a heat welded portion. Are provided at positions not adjacent to each other. As a result, it is possible to arrange the heat radiating pipe inside the folded portion without protruding the heat radiating pipe, and to further improve the heat insulation performance. In general, it can be applied to, for example, commercial refrigerators and vending machines.

DESCRIPTION OF SYMBOLS 100 Thermal welding part 101 Core material 102 Gas barrier film 103 Vacuum heat insulating material (member)
104 1st groove part 105 2nd groove part 106 Upper and lower end part 107 Outer box 108 Inner box 109 Foam heat insulating material 110 Heat insulation box body 111 Radiation pipe 112 Refrigerator

Claims (4)

A core member is covered with a gas barrier film, the periphery of the film is sealed with a heat-welded part, and the inside is decompressed and sealed, and a first groove part having a groove formed in the longitudinal direction on the surface of the plate-like member, A second groove portion having a groove formed in a hand direction, wherein the first groove portion and the second groove portion are formed so as to cross each other at least on a plate-like surface, and the second groove portion is a roll A vacuum heat insulating material that is press-molded and provided at a position where the second groove portion is not adjacent to the heat welded portion. The number of said 1st groove parts is a vacuum heat insulating material of Claim 1 larger than the number of said 2nd groove parts. The vacuum heat insulating material according to claim 1 or 2, wherein a width of the second groove portion is wider than a width of the first groove portion. The said vacuum heat insulating material as described in any one of Claim 1 to 3, the heat insulation box body which filled the foam heat insulating material between the outer box and the inner box, and the thermal radiation arrange | positioned inside the said outer box The refrigerator provided with the pipe and the said vacuum heat insulating material arrange | positioned inside the warehouse of the said heat radiating pipe, The refrigerator which arrange | positioned the said heat radiating pipe in the said 1st groove part and the said 2nd groove part.