JP5578266B1 - refrigerator - Google Patents

Abstract

An object of the present invention is to provide a refrigerator having high design without causing external appearance deformation of a heat insulating box even when a groove is provided in a vacuum heat insulating material.
A vacuum heat insulating material (103) has a concave horizontal groove (105), a heat radiating pipe is disposed in the horizontal groove (105), and communication between the outside of the heat insulating box (110) and the horizontal groove (105) is interposed via a foam heat insulating material (109). By providing the member 124, in the refrigerator in which the vacuum heat insulating material 103 is provided with the recessed lateral groove 105, the air in the lateral groove 105 can be communicated with the outside air without being sealed, and pressure fluctuation due to temperature change can be suppressed. It becomes possible, and the external appearance deformation | transformation of the heat insulation box 110 provided with the vacuum heat insulating material 103 can be suppressed.
[Selection] Figure 4

Description

  The present invention relates to a refrigerator in which a vacuum heat insulating material is disposed in a heat insulating box.

In recent years, as the demand for larger refrigerators and smaller installation spaces has increased, the refrigerator insulation walls have been made thinner, vacuum insulation has been placed and inserted, and heat interference from the heat radiating pipe has been reduced for energy saving. Refrigerators that improve thermal insulation performance have been developed. (For example, see Patent Document 1)
Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  In FIG. 17, the refrigerator cross-sectional view explaining the conventional refrigerator described in patent document 1 is shown. In FIG. 17, the heat insulating box 10 in which the foam heat insulating material 41 is filled between the outer box 31 and the inner box 32, the heat radiating pipe 33 disposed on the inner surface side of the outer box 31, and the core material 14 with the outer cover material 15. In the refrigerator including the vacuum heat insulating panel 13 provided with the groove portion 11 in which the inside is reduced in pressure and the heat radiating pipe 33 is fitted, the vacuum heat insulating panel 13 faces the groove portion 11 on the back surface of the surface on which the groove portion 11 is formed. By forming the convex portion 12 having a width perpendicular to the longitudinal direction of the groove portion 11 and wider than the groove portion 11, the heat insulation performance can be improved and energy saving can be achieved.

JP 2008-64323 A

  However, although the above-described conventional configurations have the respective effects, they are insufficient for the recent demands for increasing the capacity of the refrigerator and reducing the installation space, and the needs for energy saving.

  That is, in order to increase the capacity of the refrigerator, it is effective to reduce the thickness of the refrigerator heat insulating wall or eliminate the ineffective space. Therefore, in order to reduce the thickness of the refrigerator heat insulation wall, it is possible to insert a vacuum heat insulating material or to replace the condenser in the machine room (located at the bottom of the refrigerator) with a heat radiating pipe attached to the side of the refrigerator in order to eliminate the ineffective space. Made.

  At this time, a heat sink is covered by forming a concave groove in the vacuum heat insulating material affixed to the back surface and the side surface of the refrigerator main body, thereby improving the heat insulating effect and thinning the refrigerator cross section wall.

  On the other hand, the concave groove formed in the vacuum heat insulating material can be kept reliable only in a linear shape, and the vacuum heat insulating material is provided with a groove corresponding to the bent shape portion of the heat radiating pipe at the upper and lower sides of the refrigerator side. I had the problem that I couldn't.

  For this reason, it is not possible to apply vacuum insulation to the bent shape of the radiating pipe at the top and bottom of the refrigerator, and if the wall thickness is reduced to secure the storage capacity, the strength of the outer box will decrease or the box will enter. The amount of heat has increased, and it has been difficult to achieve both energy saving and large capacity.

  An object of the present invention is to solve the above-described problems, and to provide a refrigerator that can secure strength even when the refrigerator cross-sectional wall is thinned, has a small space, a large capacity, and high energy saving performance.

In order to solve the above-described conventional problems, the refrigerator of the present invention includes a heat insulating box body filled with a foam heat insulating material between an outer box and an inner box, a heat radiating pipe disposed inside the outer box, The inside of the heat radiating pipe is provided with a vacuum heat insulating material which covers a core material with a gas barrier film and whose inside is decompressed and sealed. The vacuum heat insulating material has a concave groove, and the heat radiating pipe is disposed in the groove. And a communication member that communicates the outside of the heat insulation box and the groove with the foam heat insulating material interposed therebetween, and has a reinforcing member at the refrigerator side lower ridge line portion, and the communication One end of the member is disposed in a space communicating with the outside air between the outer box and the reinforcing member .

  With the above configuration, pressure fluctuation due to temperature change can be suppressed by communicating with the outside air without sealing the air in the groove.

  With the above configuration, the refrigerator according to the present invention is a refrigerator in which a recess-shaped groove is provided in a vacuum heat insulating material, and does not seal the air in the groove and can communicate with the outside air, thereby suppressing pressure fluctuation due to temperature change. It becomes possible and the external appearance deformation | transformation of the heat insulation box provided with the vacuum heat insulating material can be suppressed.

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 Side surface sectional drawing explaining the refrigerator by Embodiment 1 of this invention The D section simple enlarged view of FIG. 4 of 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 BB sectional drawing of FIG. 6 which shows the vacuum heat insulating material used for the refrigerator by Embodiment 1 of this invention. CC sectional drawing of FIG. 6 which shows the vacuum heat insulating material used for the refrigerator by Embodiment 1 of this invention. 1 is a cross-sectional view taken along the line AA in FIG. 1 for explaining the refrigerator according to the first embodiment of the present invention. The top view of the vacuum heat insulating material used for the refrigerator in the reference example of this invention Sectional drawing of the refrigerator in Embodiment 3 of this invention Front view of vacuum heat insulating material and heat radiating pipe of refrigerator in same embodiment Sectional drawing of the refrigerator in Embodiment 4 of this invention The perspective view of the heat radiating pipe of the refrigerator of the embodiment Front view of vacuum heat insulating material and heat radiating pipe of refrigerator in same embodiment Front view of the vacuum heat insulating material and the heat radiating pipe of the refrigerator in the fifth embodiment of the present invention Side wall horizontal sectional view of a conventional heat insulation box of a refrigerator

The invention according to claim 1 is 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 an inner side of the heat radiating pipe. And a vacuum heat insulating material in which the core material is covered with a gas barrier film and the inside thereof is decompressed and sealed. The vacuum heat insulating material has a concave groove, and the heat dissipation pipe is disposed in the groove, and the foam It is provided with a communication member that communicates the outside of the heat insulation box and the groove with a heat insulating material interposed therebetween, and has a reinforcing member at the refrigerator side lower ridge line portion, and one end of the communication member is the outer box In the refrigerator provided with a recess-shaped groove in the vacuum heat insulating material, it is possible to communicate with the outside air without sealing the air in the groove. Pressure fluctuation due to temperature change can be suppressed, and vacuum insulation is provided. And the appearance deformation of the insulating box body can be suppressed.

  According to a second aspect of the present invention, in the first aspect of the invention, the end of the vacuum heat insulating material is provided with a glue surface, so that the inflow of the foam heat insulating material can be prevented, and the appearance deformation can be suppressed.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the vacuum heat insulating material has a concave lateral groove from the front side to the back side of the heat insulating box, and one end of the communication member is By being embedded in the lateral groove, the connecting member can be formed into a shape having no refracting portion within a range covered with the groove of the vacuum heat insulating material, and the connecting member can be simplified.

Invention of Claim 4 is the heat insulation box body which filled the foam heat insulating material between the outer box and the inner box, the heat radiating pipe arrange | positioned inside the said outer box, and the warehouse inside of the said heat radiating pipe. And a vacuum heat insulating material that covers the core material with a gas barrier film and whose inside is decompressed and sealed, and the vacuum heat insulating material includes a vertical groove and a horizontal groove, and the vertical groove and the horizontal groove intersect each other and Opening at the end of the vacuum heat insulating material, the portion without the vertical groove and the horizontal groove in the outer peripheral edge of the vacuum heat insulating material as a reference wall thickness, and the outside of the heat insulating box body and the above through the foam heat insulating material By providing a communication member that communicates with the vertical or horizontal groove, the manufacturing process is kept inexpensive, while increasing the coverage of the heat radiating pipe, improving the heat insulation performance of the vacuum insulation material periphery, improving the bending elastic strength, and reducing the warpage of the vacuum insulation material. Can be prevented, heat insulation performance and strength and appearance of the heat insulation box It is possible to increase the position, it is possible to suppress the pressure fluctuation due to temperature change can be suppressed appearance deformation of the insulating box body provided with a vacuum heat insulating material.

  Embodiments of a vacuum heat insulating material according to the present invention will be described below 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, 3 and 4 are side sectional views of the refrigerator according to Embodiment 1 of the present invention. FIG. 5 is a simplified enlarged view of part D of FIG. 4 of the refrigerator according to Embodiment 1 of the present invention. FIG. 6 is a plan view of a vacuum heat insulating material used in the refrigerator according to Embodiment 1 of the present invention. 7 is a BB cross-sectional view of FIG. 6 showing a vacuum heat insulating material used in the refrigerator according to Embodiment 1 of the present invention. 8 is a cross-sectional view taken along the line CC of FIG. 6 showing the vacuum heat insulating material used in the refrigerator according to Embodiment 1 of the present invention. FIG. 9 is a cross-sectional view taken along the line AA of FIG. 1 for explaining the refrigerator according to the first embodiment of the present invention.

  In FIG. 1 to FIG. 9, the refrigerator main body 112 is formed between a metal (for example, iron plate) outer box 107 and a hard resin (for example, ABS) inner box 108, and between the outer box 107 and the inner box 108. A heat insulating box 109 made of foam heat insulating material 109 filled with foam, a refrigerating room 113 as a storage room provided at the top of the main body, and a refrigerating, vegetable, chilled from the freezing temperature zone provided under the refrigerating room 113 Switching chamber 114 that can be switched to a temperature zone such as, ice making chamber 115 provided in parallel to switching chamber 114 under refrigeration chamber 113, vegetable chamber 116 provided in the lower part of the main body, and switching installed in parallel It is comprised of a freezing room 117 provided between the room 114 and the ice making room 115 and the vegetable room 116. The front portions of the switching chamber 114, the ice making chamber 115, the vegetable chamber 116, and the freezer compartment 117 are freely opened and closed by a drawer-type door (not shown), and the front surface of the refrigerator compartment 113 is opened and closed by a door-opening door (not shown), for example. Freely blocked.

  There is a cooling chamber on the back of the refrigerator main body 112, and includes a cooler 118 that generates cool air and a cool air blower fan 119 that supplies the cool air to each chamber, and a temperature detection sensor (not shown) and a damper inside the refrigerator. Etc. (not shown), the internal temperature is controlled. Further, a defrosting means (not shown) is installed below the cooler 118. The cooler 118 is made of aluminum or copper.

  The refrigerator main body 112 is formed by sequentially connecting a compressor 120, a condenser (not shown), a heat radiating pipe 111, a capillary tube 121, and a cooler 118, which are arranged at the back of the top of the main body, in an annular shape. The refrigerant is sealed in the refrigeration cycle and the cooling operation is performed. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection.

A heat radiating pipe 111 is disposed on the back and side surfaces of the refrigerator main body 112, and a heat radiating length is secured by bending one pipe into, for example, a U-shape, and the outer box 107 is secured with aluminum tape or the like. Fixed and pasted. The heat radiating pipe 111 is usually divided and attached to each surface of the outer box of the refrigerator main body, and pipes on each surface are welded and connected in the machine room.

  And the vacuum heat insulating material 103 is affixed on the thermal radiation pipe 111 arrange | positioned at the refrigerator side surface. The upper end portion of the vacuum heat insulating material 103 is arranged to extend upward from the top surface portion of the inner box 108, and the lower end portion is arranged to extend downward from the bottom surface portion of the inner box 108. The part where the vacuum heat insulating material 103 extends from the inner box 108 may be a part of the vacuum heat insulating material. Further, either one of the upper and lower ends of the vacuum heat insulating material 103 may extend from the upper and lower end surfaces of the inner box 108.

  The vacuum heat insulating material 103 has a heat radiating pipe embedded groove, and the heat radiating pipe embedded groove includes a vertical groove 104 and a horizontal groove 105, and the vertical groove 104 and the horizontal groove 105 are orthogonal to each other and intersect at approximately 90 °. The grooves 104 and the lateral grooves 105 intersect each other at least on the surface of the vacuum heat insulating material, and have a structure in which grooves are formed to the upper, lower, left and right end surfaces of the vacuum heat insulating material 103 and are opened at the end portions. Further, the vacuum heat insulating material 103 is formed in a rectangular shape, a plurality of vertical grooves 104 are formed at predetermined intervals along the longitudinal direction of the vacuum heat insulating material 103, and the lateral grooves 105 are formed along the short direction of the vacuum heat insulating material 103. Formed at the top and bottom.

  Specifically, the longitudinal groove 104 has a groove width of 4.2 mm and a groove depth of 4.0 mm, which is slightly larger than the outer diameter of the heat radiating pipe 111 of 4.0 mm. The vacuum heat insulating material 103 is fixed to the outer box 107 with an adhesive or the like.

  In the present embodiment, the vertical groove 104 and the horizontal groove 105 intersect at a substantially right angle, and the width of the horizontal groove is wider than the width of the vertical groove.

  Specifically, the lateral groove is located on the storage chamber side below the urethane filling portion of the top wall, and is formed, for example, with a groove width of 70 mm from a position 55 mm from the upper end of the inner box.

  A plurality of vertical grooves 104 and horizontal grooves 105 are formed, and the number of vertical grooves 104 is larger than the number of horizontal grooves 105.

  The heat radiating pipe 111 has a bent portion 127 arranged in the refrigeration temperature zone of the lowermost vegetable compartment 116 portion and the uppermost refrigerated compartment 113 portion, and is attached with a vacuum heat insulating material capable of increasing the coverage. That is, the heat radiating pipe 111 is disposed below the top surface portion of the inner box 108 and above the bottom surface portion of the inner box 108. In addition, since there is a cooling chamber in the rear side of the refrigerator, the heat radiating pipe 111 is arranged up to the front surface of the cooling chamber, but this is not restrictive.

  The refrigerator compartment 113 is normally set at 1 to 5 ° C. with the temperature not frozen for refrigerated storage as the lower limit. The vegetable room 116 is often set to 2 ° C. to 7 ° C., which is the same or slightly higher temperature setting as the refrigerator room 113. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time. The freezer compartment 117 is normally set at −22 to −18 ° C. for frozen storage, but may be set at a low temperature of −30 to −25 ° C., for example, to improve the frozen storage state.

  The refrigerator compartment 113 and the vegetable compartment 116 are called a refrigerator temperature zone because the inside is set at a plus temperature. Moreover, since the freezer compartment 117 and the ice making compartment 115 are set at a minus temperature in the interior, they are called freezing temperature zones.

  In addition, a reinforcing member 200 for improving the strength is provided on the lower side ridge line portion of the refrigerator main body 112. The reinforcing member 200 is formed to rise from the bottom surface of the outer box 107 to the back surface, and the reinforcing member 200 and the outer box 107 are provided with an inter-component space 201 that communicates with the outside air.

Further, a heat radiating pipe side 111S for heat radiating is provided on the side surface of the refrigerator main body 112, and a heat radiating length is secured by bending one pipe into, for example, a U-shape, which is attached to the outer box 107. ing. Similarly, a heat radiating pipe front 111F is bent in a U shape on the front surface of the refrigerator main body 112, and is disposed in a partition (not shown) of each storage chamber. The heat radiating pipe front 111F is connected to the machine room 126 through the partition of each storage room.

  Moreover, the vacuum heat insulating material 103 is affixed on the heat radiating pipe side 111S provided on the side of the refrigerator. The vacuum heat insulating material 103 includes a vertical groove 104 and a horizontal groove 105 in which the heat radiating pipe side 111S is installed. The vertical groove 104 extends along the longitudinal direction of the vacuum heat insulating material 103 (that is, the vertical direction of the refrigerator). The grooves are formed up to the upper and lower end surface portions 106, and a plurality of vertical grooves 104 are arranged in parallel to each other.

  The horizontal grooves 105 are concave grooves extending along the short direction of the vacuum heat insulating material 103 (that is, the front-rear direction of the refrigerator), and are arranged one by one in the vertical direction of the vertical grooves 104 so as to intersect each other. Has been. Further, the lower lateral groove 105 is disposed at least below the upper end of the bottom partition wall of the refrigerator main body 112.

  Bending portions 127 bent at the upper and lower ends of the heat radiating pipe side 111S are arranged on the upper and lower horizontal grooves 105.

  In addition, either one of the upper and lower grooves (in this embodiment, the lower horizontal groove 105) of the horizontal groove 105 is an introduction groove in which at least one of the heat radiating pipe side 111S or the heat radiating pipe front 111F is a part of the lower horizontal groove 105. 122.

  The heat radiating pipe side 111S is introduced from the peripheral edge of the vacuum heat insulating material 103 through the introduction groove 122 of the heat radiating pipe side 111S into the horizontal groove 105, a straight portion is disposed in the vertical groove 104, and a bent portion 127 is provided in the horizontal groove 105. Arranged so as to pass through the outlet groove 125 of the heat radiating pipe side 111S of the vertical groove 104 formed in the upper part of the horizontal groove 105, almost the whole of the heat radiating pipe side 111S meandering up and down is made up of the vacuum heat insulating material 103. It arrange | positions between a vacuum heat insulating material and an outer-box side board, without jumping out from the upper-lower-end surface part 106. FIG.

  Further, one end of a communication member 124 that communicates the outside air with the space 123 formed between the outer box 107 and the heat radiating pipe side 111S is disposed in the upper and lower horizontal grooves 105. The other end of the communication member 124 is disposed in a hole having a diameter larger than the diameter of the communication member 124 provided on the reinforcing member 200 formed so as to rise from the bottom surface of the outer box 107 to the rear surface. The inter-part space 201 formed between the parts communicates with the outside air and discharges air in the lateral grooves.

  That is, the communication member 124 of the present embodiment is configured to communicate with the outside air substantially linearly along the lateral groove 105. This can be achieved by using a reinforcing member 200 with a foam heat insulating material interposed therebetween and communicating with the outside air.

  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 126, particularly in the heat radiating pipe side 111S installed in the outer box 107, the outer box It is cooled and liquefied by heat exchange with the air outside 107 and the foam heat insulating material 109 in the warehouse.

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.

  As in the present embodiment, a refrigerator layout configuration in which the vegetable compartment 116 is installed below and the refrigerator compartment 113 is installed above is often used from the viewpoint of usability. Moreover, the refrigerator of the structure which has arrange | positioned the compressor in the top | upper surface back part is also used from the point of a user-friendliness point and the point of the improvement of storage capacity.

  And conventionally, since it is difficult to create a heat radiation pipe embedding groove in a bent shape other than a straight line, the vacuum heat insulating material can only be applied to the vicinity of the bent portion of the heat radiation pipe. In this embodiment, the groove formed in the vacuum heat insulating material 103 includes the vertical groove 104 and the horizontal groove 105, the vertical groove 104 and the horizontal groove 105 intersect each other, and the vertical groove 104 and the horizontal groove 105 are formed in the vacuum heat insulating material 103. The straight portion of the heat radiating pipe 111 formed by folding the straight portion and the bent portion 127 is disposed in the vertical groove 104, and the bent portion 127 is disposed in the horizontal groove 105, whereby the heat radiating pipe 111 is bent. The entire heat radiating pipe 111 including the portion 127 can be covered with the vacuum heat insulating material 103.

  That is, since the upper end portion of the vacuum heat insulating material 103 can be arranged to extend upward from the top surface portion of the inner box 108 and the lower end portion can be arranged to extend downward from the bottom surface portion of the inner box 108, the vacuum heat insulating material can be arranged. The coverage ratio of 103 is improved, the intrusion heat from the outside or the heat radiating pipe 111 can be reduced, and energy saving can be achieved.

  Furthermore, by improving the coverage of the vacuum heat insulating material 103 with higher bending elastic strength than the foam heat insulating material 109 to the outer box 107, the strength of the heat insulating box can be increased and even when a load is applied to the refrigerator main body 112. The deformation of the heat insulation box can be reduced.

  Therefore, for example, in order to realize a large capacity with high market needs and to realize without changing the external dimensions, it is essential to reduce the wall thickness, but it is possible to ensure the strength of the outer box at that time Become.

  In the present embodiment, the vertical groove 104 and the horizontal groove 105 formed in the vacuum heat insulating material 103 intersect each other, and the vertical groove 104 and the horizontal groove 105 are configured to be opened at the end of the vacuum heat insulating material 103. The thickness of the vacuum heat insulating material 103 positioned outside the bent portion 127 of the heat radiating pipe 111 in the vertical direction of the vacuum heat insulating material 103 can be a reference wall thickness without a groove. As compared with the case where the outer end face is opened, there is an advantage that the heat insulating property of the periphery of the vacuum heat insulating material can be enhanced.

  Furthermore, in the case of a vacuum heat insulating material having an outer peripheral end face as a groove and an outer end face opened, the wall thickness of the entire outer peripheral end face becomes thinner than the reference wall thickness without the groove, so that the bending elastic strength of the thinned portion is lowered. In the vacuum heat insulating material 103 of the present embodiment, the vertical groove 104 and the horizontal groove 105 intersect each other, and the vertical groove 104 and the horizontal groove 105 are the ends of the vacuum heat insulating material 103. With the configuration that is open at the part, the majority of the outer periphery of the vacuum heat insulating material 103 can be the reference wall thickness of the part without the groove, suppressing the reduction of bending elastic strength, and preventing the warpage of the vacuum heat insulating material There is also an advantage that can be done. Therefore, peeling of the vacuum heat insulating material 103 from the outer box 107 can be prevented, the deformation of the outer box 107 can be prevented, and the structural strength of the heat insulating box can be ensured.

  In the present embodiment, the vertical groove 104 and the horizontal groove 105 formed in the vacuum heat insulating material 103 intersect with each other, and the vertical groove 104 and the horizontal groove 105 are open at the end of the vacuum heat insulating material 103. The degree of freedom in designing the connecting pipe between the inlet portion and the other portion of the outlet portion of the heat radiating pipe 111, which is affixed to the outer box on one surface of the box body and folded back by the straight portion and the bent portion, can be increased.

  For example, even if the piping design of the heat radiating pipe 111 is different between the right side surface and the left side surface, it is possible to use the vacuum heat insulating material 103 by using the opening ends of the vertical groove 104 and the horizontal groove 105. Furthermore, a plurality of vertical grooves 104 formed along the longitudinal direction of the vacuum heat insulating material 103 can be formed, and it is also possible to use a model in which the pitch of the straight portion of the heat radiating pipe 111 is different.

  As a method of forming the vertical groove 104 and the horizontal groove 105 in the vacuum heat insulating material 103, after forming the vacuum heat insulating material 103 to an equal thickness, the vertical groove 104 and the horizontal groove 105 are formed while being moved by a press or a roller. However, when the vertical groove 104 and the horizontal groove 105 are opened at the end of the vacuum heat insulating material 103, it is possible to select a roller that is relatively inexpensive to manufacture and can be easily changed. is there.

  Further, the groove width of the lateral groove 105 formed along the short direction of the vacuum heat insulating material 103 is formed wider than the groove width of the vertical groove 104 formed along the longitudinal direction of the vacuum heat insulating material 103, so that the heat radiating pipe 111. Even if the bent portion 127 is designed to be large, it can be securely stored in the groove. Furthermore, by setting the bending R of the bent portion 127 to be large, it is possible to reduce the occurrence of problems in the bending process of the heat radiating pipe 111 and to improve the reliability of the cooling system design.

  Further, not only the bent portion 127 of the heat radiating pipe 111 but also a connecting pipe between the inlet portion and the other surface of the heat radiating pipe 111 can be arranged in the lateral groove 105, and the heat radiating pipe 111 with respect to the vacuum heat insulating material 103 can be arranged. The pipe concentration rate can be increased. In this embodiment, the number of the heat radiating pipes 111 disposed in the horizontal grooves 105 is two. However, the number of the heat radiating pipes 111 is not limited to this, and three or more heat radiating pipes 111 are embedded by forming the horizontal grooves 105 wider than the vertical grooves 104. May be.

  In addition, since the position of the bent portion 127 of the heat radiating pipe 111 attached to the side surface of the refrigerator main body is arranged corresponding to the vegetable compartment 116 and the refrigerator compartment 113, the vacuum heat insulation is located outside the bent portion 127 of the heat radiating pipe 111. The thickness of the material 103 can be set to a reference wall thickness without a groove, and the heat insulating property at the periphery of the vacuum heat insulating material can be improved.

  Moreover, since the vacuum heat insulating material 103 can be affixed to the lower part of the lowermost vegetable compartment 116, the center of gravity of the entire refrigerator can be lowered, and the fall can be prevented. Furthermore, if the vacuum heat insulating material 103 is affixed to the outside of the bottom of the inner box of the freezer compartment 117, the intrusion heat of the vegetable compartment 116 is further reduced and energy saving can be achieved.

  As described above, in the refrigerator of this embodiment, the vertical groove 104 and the horizontal groove 105 formed in the vacuum heat insulating material 103 intersect each other, and the vertical groove 104 and the horizontal groove 105 are opened at the end of the vacuum heat insulating material 103. By disposing the straight part of the heat radiating pipe 111 folded back between the straight part and the bent part 127 in the vertical groove 104 and arranging the bent part 127 in the horizontal groove 105, the heat radiating pipe including the bent part 127 of the heat radiating pipe 111 is arranged. The whole 111 can be covered with the vacuum heat insulating material 103, the coverage of the vacuum heat insulating material 103 can be improved, the intrusion heat from the outside or the heat radiating pipe 111 can be reduced, and the energy can be saved.

  Furthermore, by improving the coverage of the vacuum heat insulating material 103 with higher bending elastic strength than the foam heat insulating material 109 to the outer box 107, the strength of the heat insulating box can be increased and even when a load is applied to the refrigerator main body 112. The deformation of the heat insulation box can be reduced.

  Further, in this embodiment, the heat radiation pipe 111 can be covered from the three sides with the horizontal groove 105 by providing the upper and lower end surface portion 106 of the vacuum heat insulating material 103 with the concave groove shape and the transverse groove 105 that crosses from the front surface to the rear surface. Thus, the heat insulation performance can be improved.

  Moreover, in order to attach the vacuum heat insulating material 103 and increase the coverage rate, the refrigerator cross-section wall had to be thickened to reduce intrusion heat, and the internal capacity had to be reduced. By forming the lateral groove 105 in the bent portion 127 of the heat radiating pipe side 111S or the heat radiating pipe front 111F, the upper and lower end surface portions 106 of the vacuum heat insulating material 103 can be extended from the end portion of the inner box 108, and the covering rate is increased. Further, the width of the horizontal groove 105 is wider than the width of the vertical groove 104, and it is possible to design the bent diameter of the heat radiating pipe side 111S so that the heat radiating pipe side 111S. It is possible to ensure reliability.

  As described above, in the present embodiment, a longitudinal groove having a groove formed in the longitudinal direction on the surface of a plate-like vacuum heat insulating material 103 in which the core material 101 is covered with the gas barrier film 102 and the inside thereof is decompressed and sealed. 104 and a transverse groove 105 having a groove formed in the short direction are formed up to the upper and lower end surface portions 106 of the vacuum heat insulating material 103. The longitudinal groove 104 and the transverse groove 105 are formed so as to intersect each other at least on a plate-like surface. Thus, in the refrigerator main body 112 provided with the vacuum heat insulating material 103 inside the heat radiating pipe side 111S, the folded portion of the heat radiating pipe side 111S is disposed in the vacuum heat insulating material 103 without protruding the heat radiating pipe side 111S. And further heat insulation performance can be improved.

  Furthermore, since the vertical grooves 104 are arranged up to the upper and lower end surface portions 106 of the vacuum heat insulating material 103, the strength of the upper and lower end surface portions 106 of the vacuum heat insulating material 103 is improved, and warpage, deformation, and the like of the vacuum heat insulating material 103 are also prevented. It becomes the minimum, and it becomes easy to attach to the refrigerator main body 112, and the number of man-hours can be reduced.

  Further, by providing a paste surface for pasting with the outer box 107 between the lateral groove 105 and the upper and lower end surface portions 106, it becomes possible to prevent inflow when filling the foam heat insulating material 109, and appearance at the foaming pressure. It becomes possible to prevent deformation.

  In addition, the length of the heat radiating pipe side 111S can be easily set according to the required performance of the refrigerator main body 112 by forming the rectangular shape and providing the vertical grooves 104 more than the horizontal grooves 105. Become.

  Further, since the lateral groove 105 is formed in a rectangular shape and the width of the groove is wider than the width of the vertical groove 104, it is possible to design a large bending diameter of the turn part of the heat radiating pipe side 111S to be buried, and to radiate the heat radiating pipe side 111S. Alternatively, the reliability of the heat radiating pipe front 111F can be ensured.

  Further, the vacuum heat insulating material 103 has a space 123 formed between the vertical groove 104, the horizontal groove 105, the outer box 107, and the heat radiating pipe side 111S or the heat radiating pipe front 111F, and the communication that communicates 2 and the outside air. By providing one end of the member 124 in the horizontal groove 105, the air in the vicinity of the heat radiating pipe side 111S or the heat radiating pipe front 111F and the air in the groove can be easily ventilated with the outside air, and the pressure due to the ambient temperature change or the like It is possible to suppress the change and to suppress the external deformation of the outer box 107.

In addition, by providing the communication member 124 in the lateral groove 105 having a groove width larger than that of the longitudinal groove 104, that is, having a small flow resistance, air staying in the plurality of longitudinal grooves 104 can flow to the lateral groove 105 side in a short time. become. Furthermore, since it is possible to dispose at least one of the heat radiating pipe side 111S or the heat radiating pipe front 111F not only in the vertical groove 104 but also in the horizontal groove 105, the temperature of the air in the groove itself becomes high and the staying air can be more easily It becomes possible to circulate and realize smooth air discharge.

  Furthermore, by inserting the communication member 124 provided in the horizontal groove 105 of the vacuum heat insulating material 103 into the hole of the reinforcing member 200, the air in the horizontal groove 105 passes through the space 201 between the parts provided in the outer box 107 and the reinforcing member 200. Since air can be discharged to the outside air, the number of parts is small and the shape of the connecting member can be simplified. For example, the material cost can be reduced by using a straight shape, using a resin as a material, and enabling extrusion molding.

  In addition, the foam heat insulating material 109 filled between the outer box 107 and the inner box 108 of the heat insulating box 110 has the front opening portion of the heat insulating box 110 facing the bottom surface in order to improve the filling property. The material of the foam heat insulating material 109 is injected downward from the opening provided on the back surface of the foam, and the foam heat insulating material 109 is gradually moved from the lower side (front opening side) toward the upper side (back side of the heat insulating box 110). In this embodiment, one end of the communication member 124 is disposed along the lateral groove 105 of the vacuum heat insulating material 103 and the other end communicates with the outside air on the back side of the heat insulating box 110. Therefore, air escapes through the communication member 124 in the same direction as the foam insulation material 109 is foam-filled, and the efficiency of air venting in the groove at the time of foam-filling can be improved.

( Reference example )
FIG. 10 is a plan view of a vacuum heat insulating material used in the refrigerator in the reference example of the present invention. The same configuration and the same technical idea as those of the first embodiment can be applied to this reference example .

  A vacuum heat insulating material 103 is attached to the heat radiating pipe side 111S disposed on the side of the refrigerator. The vacuum heat insulating material 103 includes a vertical groove 104 and a horizontal groove 105 in which the heat radiating pipe side 111S is installed. The vertical groove 104 extends along the longitudinal direction of the vacuum heat insulating material 103 (that is, the vertical direction of the refrigerator). The grooves are formed up to the upper and lower end surface portions 106, and a plurality of vertical grooves 104 are arranged in parallel to each other.

  The horizontal grooves 105 extend along the short direction of the vacuum heat insulating material 103 (that is, the front-rear direction of the refrigerator), are the horizontal grooves 105 having no glue surface on the end surface, and are arranged one by one in the vertical direction of the vertical grooves 104. Are formed so as to cross each other. Further, the lateral groove 105 formed in the downward direction is disposed at least below the upper end of the bottom partition wall of the refrigerator main body 112.

  Bending portions 127 bent at the upper and lower ends of the heat radiating pipe side 111S are arranged on the upper and lower horizontal grooves 105.

  Further, at least one of the upper and lower grooves (in this embodiment, the lower horizontal groove 105 in this embodiment) of the horizontal groove 105 is connected to the lower horizontal groove 105 at least one of the heat radiating pipe side 111S or the heat radiating pipe front 111F.

  The heat radiating pipe side 111S passes from the peripheral edge of the vacuum heat insulating material 103 through the horizontal groove 105 on the lower side of the heat radiating pipe side 111S, the straight portion is arranged in the vertical groove 104, the bent portion 127 is arranged in the horizontal groove 105, and the horizontal groove The upper and lower end face portions 106 of the vacuum heat insulating material 103 are almost entirely disposed in the upper and lower portions of the heat-dissipating pipe side 111S meandering up and down. It arrange | positions between a vacuum heat insulating material and an outer case side board, without jumping out more.

  Further, a communication member 124 is provided in the lateral groove 105 to communicate the space 123 formed between the outer box 107 and the heat radiating pipe side 111S and the outside air. The air is released.

  The communication member 124 includes a portion parallel to the lateral groove 105 and a bent and raised portion, and is configured to communicate with the outside air. This uses a foaming jig to prevent deformation due to foaming pressure when the foam heat insulating material 109 is filled between the outer box 107 and the inner box 108. However, a heat radiating pipe or a communication member 124 fixed to the outer box is used. Is configured to have an L-shaped or U-shaped bent portion for escape so as not to interfere with the foaming jig. Thereby, after filling the heat insulation box body 110 with the foam heat insulating material 109, the heat radiation pipe or the communication member 124 can be pulled out and provided with a degree of freedom to be arranged at a predetermined position.

  This is because the transverse grooves 105 extending along the short direction of the vacuum heat insulating material 103 (that is, the front-rear direction of the refrigerator) and having no glue surface on the end surface are used. The member 124 can be pulled out).

  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.

  In the present embodiment, the communication member 124 is arranged in the same direction as the filling direction of the urethane by providing the transverse groove 105 that traverses from the front surface to the back surface of the outer box 107 having no glue surface on the upper and lower end surface portion 106 of the vacuum heat insulating material 103. In other words, the pressure is increased by the foaming pressure of urethane, and the speed of air venting can be improved. Therefore, the efficiency of air venting in the vertical grooves 104 and the horizontal grooves 105 can be improved.

  Further, since the communication member 124 is composed of a portion parallel to the lateral groove 105 and a bent and raised portion and communicates with the outside air, the heat radiating pipe and the communication member 124 are pulled out and arranged at a predetermined position. The degree of freedom can be given.

(Embodiment 3)
FIG. 11 is a cross-sectional view of the refrigerator according to Embodiment 3 of the present invention. FIG. 12 is a front view of the vacuum heat insulating material and the heat radiating pipe of the refrigerator according to the embodiment. The same configuration and the same technical idea as those of the first and second embodiments can be applied to this embodiment.

  11 and 12, the heat radiating pipe 312 that is a part of the condenser of the cooling system (not shown) meanders so as to form a plurality of straight portions, and the inlet portion 313 and the outlet portion 314 are the lower rear portion of the refrigerator 301. It protrudes in the machine room 315 formed in this, and is connected with another heat radiating pipe (not shown). The vacuum heat insulating material 316 has a thickness larger than the diameter of the heat radiating pipe 312 and has a plurality of longitudinal grooves 317 formed to the end of the vacuum heat insulating material 316 and a plurality of transverse grooves 318 in the short direction. The vertical groove 317 and the horizontal groove 318 cross each other in a cross shape.

  Here, in the plurality of lateral straight portions of the heat radiating pipe 312, the upper straight portion 319 located on the upper side of the refrigerator and the lower straight portion 320 located on the lower side of the refrigerator are respectively formed on substantially the same straight line. , Each is disposed in one transverse groove 318.

  Further, the vacuum heat insulating material 316 is formed so that the heat radiation pipe 312, the vertical groove 317, and the horizontal groove 318 are multilayered after an adhesive is applied to a surface other than the vertical groove 317 and the horizontal groove 318 on the surface on the outer box 302 side. 302 is attached.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  When manufacturing the refrigerator 301, first, the heat radiating pipe 312 is attached to the outer box 302 with a metal foil tape (not shown) or the like, and the vacuum heat insulating material 316 is attached thereon. Thereafter, the inner box 303 is fitted into the outer box 302, and a foam heat insulating material 304 such as urethane foam is filled between the outer box 302 and the inner box 303 to form a heat insulating box body 306.

  At this time, air is present in the space surrounded by the vertical grooves 317 and the horizontal grooves 318, the outer box 302, and the heat radiating pipe 312 before filling with the foam heat insulating material 304. Here, when the vertical groove 317 and the horizontal groove 318 are not formed up to the end of the vacuum heat insulating material 316, an air layer is formed in this space after the heat insulating material is filled. This air layer expands and contracts when the surface of the outer box 302 or the temperature in the storage chamber 308 changes, and as a result, the outer box 302 is deformed, resulting in a refrigerator that does not look good.

  In addition, when an adhesive is applied in the vertical groove 317 or the horizontal groove 318, air does not escape and the outer box 302 is similarly deformed.

  On the other hand, in the refrigerator 301 of the present invention, the vertical groove 317 and the horizontal groove 318 communicate with each other, and the vertical groove 317 or the horizontal groove 318 is formed up to the end of the vacuum heat insulating material 316, and the adhesive is the vacuum heat insulating material 316. By being applied to the surface other than the vertical grooves 317 and the horizontal grooves 318 on the surface of the outer box 302, the heat insulating material is filled in the vertical grooves 317 and the horizontal grooves 318, so that air can be expelled and an air layer is formed. Never happen.

  Therefore, deformation of the outer box 302 can be prevented, and a refrigerator with good appearance and high design can be obtained.

  In addition, when the vertical groove 317 or the horizontal groove 318 is formed at the end of the vacuum heat insulating material 316, the outer edge of the vacuum heat insulating material 316 becomes a groove, so that the adhesive cannot be applied. As a result, when the heat insulating material is filled, the heat insulating material penetrates between the vacuum heat insulating material 316 and the outer box 302, expands, and expands, so that the outer box 302 may be deformed by the expansion pressure.

  On the other hand, since the refrigerator 301 of the present invention bonds the end of the vacuum heat insulating material 316 to the outer box 302, the heat insulating material does not enter.

  Therefore, deformation of the outer box 302 can be prevented, and a refrigerator with good appearance and high design can be obtained.

  Further, the refrigerator 301 of the present invention has a shape of the heat radiating pipe 312 that crosses the vertical groove 317 and the horizontal groove 318 so as to fit the groove, and is positioned above the refrigerator in a plurality of horizontal straight portions of the heat radiating pipe 312. The upper straight portion 319 and the lower straight portion 320 located on the lower side of the refrigerator are formed on substantially the same straight line, and are disposed in one horizontal groove 318, so the number of grooves is small. Thus, by multilayering the vacuum heat insulating material and the heat radiating pipe, deterioration of the heat insulating performance of the vacuum heat insulating material can be suppressed, the heat insulating performance of the refrigerator can be improved, and a highly efficient refrigerator can be obtained.

  That is, when a groove is formed in the vacuum heat insulating material 316, the thickness of the groove portion is reduced. In general, the amount of heat passing through the vacuum heat insulating material is proportional to the thickness of the heat insulating material, so that the heat insulating performance of the groove portion becomes low.

Therefore, by reducing the number of grooves, it is possible to suppress deterioration of heat insulation performance due to the formation of grooves in the vacuum heat insulating material 316, and it is possible to provide a refrigerator with high heat insulation performance and high efficiency.

  In the present embodiment, the air in the groove has been described as being pushed out of the groove by being filled with the heat insulating material. However, the air vent that communicates the inside of the groove and the outside of the heat insulating material, for example, the machine room 315, is described. By providing the member, the air in the groove can be extracted more reliably.

  Further, in the present embodiment, the heat radiating pipe 312 is described as being configured to be affixed to the side surface of the refrigerator 301, but the same effect can be obtained by using the same configuration on the back surface of the refrigerator 301.

  Further, in the present embodiment, the inlet portion 313 and the outlet portion 314 are defined in the heat radiating pipe 312. However, regardless of the direction in which the refrigerant flows, it is the same regardless of which of the inlet portion 313 and the outlet portion 314 is reversed. The effect of.

  In the present embodiment, the vertical groove 317 is described as the longitudinal direction of the vacuum heat insulating material 316, and the horizontal groove 318 is described as the short direction of the vacuum heat insulating material 316. This is the case where the material 316 is used, and when the horizontally long vacuum heat insulating material 316 is used, the longitudinal direction and the short direction are reversed.

  In addition, the groove portions that are multilayered with the plurality of straight portions of the heat radiating pipe 312 can be surely multilayered by setting a sufficient width in consideration of a molding error and a pasting error of the heat radiating pipe 312. .

  Further, in the present embodiment, the heat radiating pipe 312 is described as being configured to be affixed to the outer box 302, but by adopting a structure in which the heat radiating pipe is affixed to the vacuum heat insulating material 316, heat dissipation due to a bonding error of the heat radiating pipe 312 is performed. Misalignment between the pipe 312 and the groove can be prevented more reliably, and the width of the groove can be reduced.

(Embodiment 4)
FIG. 13 is a cross-sectional view of the refrigerator in the fourth embodiment of the present invention. FIG. 14 is a perspective view of the heat radiating pipe of the refrigerator according to the embodiment. FIG. 15 is a front view of the vacuum heat insulating material and the heat radiating pipe of the refrigerator according to the embodiment. Note that the same configuration and the same technical idea as in the first to third embodiments can be applied to this embodiment.

  13 to 15, reference numeral 321 denotes a heat radiating pipe. In order to improve the heat radiating efficiency and secure the length, the left and right pipes on the top surface of the refrigerator 301 are attached to the top surface of the refrigerator 301 to be attached to the left and right of the outer box 302. The structure is connected.

  Here, if the connecting part 322 is connected at the rearmost or frontmost side of the refrigerator 301, the length of the heat radiating pipe 321 is made as long as possible and the vertical groove 317 is used as it is to connect the heat radiating pipe 321 to the connecting part 322. Can do. However, the refrigerator 301 is provided with a hinge portion (not shown) for pivotally supporting the heat insulating door 307 on the frontmost surface of the top surface, and the rearmost surface is used when carrying the refrigerator 301. Since a handle portion (not shown) is provided, it is difficult to provide a connecting portion at that portion.

  Therefore, in order to configure the connecting portion 322 at the substantially central portion in the front-rear direction of the refrigerator 1 top surface, the heat radiating pipe 321 is meandered and then bent in the front upper direction of the refrigerator 301 once at the upper part of the back surface. In addition, the meandering heat radiating pipe 321 is bent upward and is connected to the connecting portion 322 at a position substantially in line with the longitudinal straight portion.

  With such a configuration, the vertical heat insulation 316 and the horizontal groove 318 are provided in the vacuum heat insulating material 316, and the vertical groove 317 and the horizontal groove 318 are crossed so that the pipe extending upward and connected to the connecting portion 322 is almost straight. The vertical heat radiating pipe 321 on the line can be multilayered with the same vertical groove 317 and can be connected to the connecting portion 322.

  Therefore, even when the heat radiating pipes 321 are provided on the left and right sides of the refrigerator 301 and connected on the top surface, the vacuum heat insulating material 316 and the heat radiating pipe 321 can be multilayered without increasing the number of grooves. The heat insulation performance deterioration due to the formation of the grooves can be suppressed, and the refrigerator can have a high heat insulation performance and high efficiency.

  In the present embodiment, the connecting portion 322 is the top surface of the refrigerator 301. However, the connecting portion 322 is formed on the back surface by bending the heat radiating pipe 321 to the back side and bending it to the back side to form a multilayered groove 318. Similar effects can be obtained.

(Embodiment 5)
FIG. 16: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in Embodiment 5 of this invention. The same configuration and the same technical idea as in the first to fourth embodiments can also be applied to this embodiment.

  In FIG. 16, the vacuum heat insulating material 323 is provided so that a part of the vertical groove 317 and the horizontal groove 318 intersect in a cross shape. In other words, the vertical groove 317 and the horizontal groove 318 are formed only in a portion that is multilayered with the meandering heat radiation pipe 324.

  Here, the vertical groove 317 and the horizontal groove 318 of the vacuum heat insulating material 323 are processed by a processing method of forming a groove in a free shape such as press processing, and only the position where the heat radiating pipe 324 is multilayered is a groove shape. It has become.

  Thereby, like Embodiment 3 and 4, since there is no groove | channel in the position where the heat radiating pipe 324 does not pass, the number of grooves can be reduced more.

  Therefore, the vacuum heat insulating material 323 and the heat radiating pipe 324 can be multilayered without increasing the number of grooves, deterioration of heat insulating performance due to the formation of grooves in the vacuum heat insulating material 323 can be suppressed, and the heat insulating performance is high. , Can be a highly efficient refrigerator.

  Since the refrigerator of the present invention can suppress external deformation of the refrigerator, it can be applied to all cooling devices provided with a recess-shaped groove in a vacuum heat insulating material.

101 Core material 102 Gas barrier film 103, 316, 323 Vacuum heat insulating material 104, 317 Longitudinal groove 105, 318 Horizontal groove 106 Upper / lower end surface portion 107, 302 Outer box 108, 303 Inner box 109, 304 Foam heat insulating material 110, 306 111, 312, 321 and 324 Radiation pipe 111S Radiation pipe side 111F Radiation pipe front 112 Refrigerator body 113 Refrigeration room 114 Switching room 115 Ice making room 116 Vegetable room 117 Freezing room 118 Cooler 119 Cold air blower fan 120 Compressor 121 Capillary tube 123 Space Portion 124 Communication member 125 Outlet groove 126, 315 Machine room 127 Bending portion 200 Reinforcing member 201 Space between parts

Claims (4)

Cover the core with a gas barrier film on the inside of the heat-dissipating pipe, the heat-insulating box filled with the foam heat-insulating material between the outer box and the inner box, the heat-dissipating pipe disposed inside the outer box And a vacuum heat insulating material whose inside is depressurized and sealed, the vacuum heat insulating material having a concave groove, the heat radiating pipe is disposed in the groove, and the foam heat insulating material is interposed between the heat insulating boxes. A communication member that communicates between the outside of the body and the groove , the refrigerator side surface lower ridge line has a reinforcing member, one end of the communication member is the outside air between the outer box and the reinforcing member A refrigerator characterized by being arranged in a communicating space . The refrigerator according to claim 1, wherein the end of the vacuum heat insulating material has a glue surface. The said vacuum heat insulating material has a concave lateral groove from the front side of the said heat insulation box to the back side, The one end of the said communication member was embed | buried in the said horizontal groove, The Claim 1 or 2 characterized by the above-mentioned. refrigerator. Cover the core with a gas barrier film on the inside of the heat-dissipating pipe, the heat-insulating box filled with the foam heat-insulating material between the outer box and the inner box, the heat-dissipating pipe disposed inside the outer box A vacuum heat insulating material whose inside is depressurized and sealed, and the vacuum heat insulating material includes a vertical groove and a horizontal groove, and the vertical groove and the horizontal groove intersect each other and open at the end of the vacuum heat insulating material. And a communicating member that communicates with the outside of the heat insulating box and the vertical groove or the horizontal groove with the foamed heat insulating material interposed between the outer peripheral edge of the vacuum heat insulating material without the vertical groove and the horizontal groove as a reference wall thickness. A refrigerator characterized by comprising.

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