WO2014103179A1

WO2014103179A1 - Refrigerator

Info

Publication number: WO2014103179A1
Application number: PCT/JP2013/007066
Authority: WO
Inventors: 美桃子井下; 愼一堀井; 濱田　和幸; 吉英中島; 西村　晃一
Original assignee: パナソニック株式会社
Priority date: 2012-12-27
Filing date: 2013-12-03
Publication date: 2014-07-03
Also published as: JP2015007523A; JP5578266B1; JP5578263B1; JP2015007527A; JP2015007526A; CN205119635U; JP5578264B1; DE212013000262U1; JP2015007524A; JP5578265B1; JP5641115B1; JP2015007525A

Abstract

A heat-insulated box body (110) forming this refrigerator has an inner box (108), an outer box (107), and heat dissipation pipes attached to the outer box (107). Furthermore, the heat-insulated box body (110) is equipped with: a vacuum insulating material (103) that forms grooves covering the heat dissipation pipes and is attached to the outer box (107); and a foam insulation material (109) filling the interval between the outer box (107) and the inner box (108). The vacuum insulating material (103) is arranged such that the upper end part of the vacuum insulating material (103) extends to higher than the top surface of the inner box (108).

Description

refrigerator

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

In recent years, there is an increasing demand for large refrigerators and reduced installation space. In view of this, a refrigerator having a thin heat insulating wall and a refrigerator in which a vacuum heat insulating material is arranged and inserted in the refrigerator heat insulating wall have been developed. In addition, a refrigerator has been developed that suppresses thermal interference from a heat radiating pipe for energy saving and improves heat insulation performance (see, for example, Patent Document 1).

Hereinafter, a conventional refrigerator will be described with reference to the drawings.

FIG. 17 is a cross-sectional view of an essential part of a refrigerator for explaining a conventional refrigerator. As shown in FIG. 17, the conventional refrigerator includes a heat insulating box 10 filled with a foam heat insulating material 41 between an outer box 31 and an inner box 32, and a heat radiating pipe 33 disposed on the inner surface side of the outer box 31. In addition, the conventional refrigerator includes a vacuum heat insulating panel 13 in which the core member 14 is covered with an outer cover material 15 and the inside of the refrigerator is decompressed and the groove portion 11 into which the heat radiating pipe 33 is fitted is formed. The vacuum heat insulation panel 13 has a convex portion 12 formed on the back surface of the surface on which the groove portion 11 is formed so as to be opposed to the groove portion 11 and wider than the groove portion 11 in the longitudinal direction. With this configuration, the refrigerator having the vacuum heat insulation panel 13 has improved heat insulation performance and can save energy.

However, although the conventional configurations described above are effective in each case, they are not sufficient for the recent demands for increasing the capacity of the refrigerator, reducing the installation space, and the need for energy saving.

That is, to increase the capacity of the refrigerator, it is effective to reduce the thickness of the refrigerator heat insulation wall and eliminate the invalid space. For this reason, a vacuum heat insulating material is inserted into the refrigerator heat insulating wall. Further, in order to eliminate the ineffective space, a contrivance is made to replace the condenser in the machine room, which is usually arranged at the lower part of the refrigerator, with a heat radiating pipe attached to the side of the refrigerator.

At this time, a concave groove is formed in the vacuum heat insulating material affixed to the back and side surfaces of the refrigerator body to cover the heat radiating pipe, 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.

Therefore, the vacuum heat insulating material cannot be pasted up to the bent shape part of the heat radiating pipe at the top and bottom of the refrigerator. Further, when the wall thickness is reduced to secure the internal capacity, the outer box strength is reduced and the amount of heat entering the box is increased, which makes it difficult to achieve both energy saving and large capacity.

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a refrigerator that can secure strength even when the refrigerator cross-section wall is thinned, has a small space, a large capacity, and high energy saving performance.

JP 2008-64323 A

In the refrigerator of the present invention, the heat insulation box constituting the refrigerator has an outer box, an inner box, and a heat radiating pipe attached to the outer box. Further, the heat insulating box includes a vacuum heat insulating material that forms a groove that covers the heat radiating pipe and is attached to the outer box, and a foam heat insulating material that is filled between the outer box and the inner box. And a vacuum heat insulating material is arrange | positioned so that the upper end part of a vacuum heat insulating material may be extended upwards from the top | upper surface part of an inner box.

Thereby, the coverage of the vacuum heat insulating material in the heat insulating box can be improved, the intrusion heat from the heat radiating pipe can be reduced, and the enlarged vacuum heat insulating material can be applied to the heat insulating box. Furthermore, it is possible to improve the strength of the heat insulating box and save energy.

FIG. 1 is a perspective view of a refrigerator main body of the refrigerator according to the first embodiment of the present invention. FIG. 2 is a side cross-sectional view for explaining the refrigerator in the first embodiment of the present invention. FIG. 3 is a side cross-sectional view of the refrigerator in the first embodiment of the present invention. FIG. 4 is a side cross-sectional view for explaining the refrigerator in the first embodiment of the present invention. FIG. 5 is a simplified enlarged view of a portion D in FIG. FIG. 6 is a plan view of a vacuum heat insulating material used for the refrigerator in the first embodiment of the present invention. 7 is a cross-sectional view taken along line 7-7 of FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. FIG. 10 is a plan view of a vacuum heat insulating material used for the refrigerator in the second embodiment of the present invention. FIG. 11 is a cross-sectional view of the refrigerator in the third embodiment of the present invention. FIG. 12: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in the 3rd Embodiment of this invention. FIG. 13: is sectional drawing of the refrigerator in the 4th Embodiment of this invention. FIG. 14 is a perspective view of the heat radiating pipe of the refrigerator in the fourth embodiment of the present invention. FIG. 15: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in the 4th Embodiment of this invention. FIG. 16: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in the 5th Embodiment of this invention. FIG. 17 is a horizontal sectional view of a side wall of a heat-insulating box of a conventional refrigerator.

Hereinafter, embodiments of 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 the refrigerator main body of the refrigerator according to the first embodiment of the present invention. 2, 3 and 4 are side cross-sectional views of the refrigerator according to the first embodiment of the present invention. FIG. 5 is a simplified enlarged view of a portion D in FIG. FIG. 6 is a plan view of a vacuum heat insulating material used in the refrigerator according to the first embodiment of the present invention. 7 is a cross-sectional view taken along line 7-7 of FIG. 8 is a cross-sectional view taken along the line 8-8 in FIG. 9 is a cross-sectional view taken along line 9-9 of FIG.

1 to 9, the refrigerator main body 112 has a metal (for example, iron plate) outer box 107 and a hard resin (for example, ABS) inner box 108 that open forward. And the refrigerator main body 112 comprises the foam insulation material 109 foam-filled between the outer box 107 and the inner box 108, and comprises a heat insulation box. In the upper part of the refrigerator main body 112, a refrigerator compartment 113 as a storage room is provided. Under the refrigerating chamber 113, a switching chamber 114 that can be switched from a freezing temperature zone to a temperature zone such as refrigeration, vegetables, and chilled, and an ice making chamber 115 are provided at the same height. A vegetable room 116 is provided at the lowermost part of the refrigerator main body 112, and a freezing room 117 is provided between the switching room 114, the ice making room 115, and the vegetable room 116. Front portions of the switching chamber 114, the ice making chamber 115, the vegetable chamber 116, and the freezing chamber 117 are freely opened and closed by a pull-out door (not shown). The front surface of the refrigerator compartment 113 is closed freely by, for example, a double door (not shown).

There is a cooling chamber 130 at the rear 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 storage chamber. The internal temperature is controlled by an internal temperature sensor (not shown), a damper, etc. (not shown). Further, a defrosting means (not shown) is installed below the cooler 118. The material of the cooler 118 is aluminum or copper.

A compressor 120 is disposed at the top of the refrigerator main body 112. The 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, and a refrigerant is enclosed to constitute a refrigeration cycle. . In recent years, a flammable refrigerant is often used as a refrigerant for environmental protection.

A heat radiating pipe 111 is disposed on the back and side surfaces of the refrigerator main body 112. The heat radiating pipe 111 secures a heat radiating length by bending one pipe into, for example, a U-shape, and is fixed to the outer box 107 with aluminum tape or the like and attached. 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 as shown in FIG. 7, FIG. 8, the vacuum heat insulating material 103 is affixed on the heat radiating pipe 111 (The heat radiating pipe side 111S, the heat radiating pipe front 111F) arrange | positioned at the refrigerator side surface. As shown in FIG. 3, the upper end portion of the vacuum heat insulating material 103 is disposed to extend upward from the top surface portion of the inner box 108, and the lower end portion is disposed 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 uppermost end and the lowermost end 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 groove for embedding the heat radiating pipe, and the groove for embedding the heat radiating pipe includes a vertical groove 104 and a horizontal groove 105 as shown in FIG. The vertical groove 104 and the horizontal groove 105 are orthogonal to each other and intersect at approximately 90 °, and the vertical groove 104 and the horizontal groove 105 intersect each other at least on the surface of the vacuum heat insulating material 103. Further, the vertical groove 104 and the horizontal groove 105 are formed up to the upper, lower, left and right end surfaces of the vacuum heat insulating material 103, and the vertical groove 104 and the horizontal groove 105 are open at the end of the vacuum heat insulating material 103. 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 groove width of the longitudinal groove 104 is 4.2 mm, the groove depth is 4.0 mm, and the outer diameter of the heat radiating pipe 111 is slightly larger than 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 105 is wider than the width of the vertical groove 104.

Specifically, the lateral groove 105 is located on the storage chamber side below the urethane filling portion of the top wall, and is formed with a groove width of 70 mm from a position 55 mm below the upper end of the inner box 108, for example.

Also, 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 dissipating pipe 111 is provided with a bent portion 127b in the refrigeration temperature zone at the position of the lowermost vegetable chamber 116 and the position of the uppermost refrigerated chamber 113, 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. Moreover, in this Embodiment, since there exists a cooling chamber in the refrigerator back direction, the thermal radiation pipe 111 is arrange | positioned to the front surface of a cooling chamber, However, It is not limited to this arrangement | positioning.

The refrigerator compartment 113 is normally set at 1 to 5 ° C. with the lower limit of the temperature at which it does not freeze for refrigerated storage. The vegetable room 116 is often set to 2 ° C. to 7 ° C., which is set to a temperature that is the same as or slightly higher than that of 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 refrigeration temperature zones because the interior is set at a plus temperature. The freezer compartment 117 and the ice making compartment 115 are called freezing temperature zones because the interior is set at a minus temperature.

Further, a reinforcing member 200 for improving the strength is provided on the lower side ridge portion of the side surface 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 partitions of the storage rooms.

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). It is a groove | channel formed to the upper-lower-end surface part 106, and the several vertical groove 104 is mutually formed in parallel.

The horizontal grooves 105 are concave grooves that extend 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 groove 104. The vertical groove 104 and the horizontal groove 105 are formed so as to intersect each other. The lower lateral groove 105 is disposed at least above the upper end of the bottom partition wall of the refrigerator main body 112.

In the upper and lower horizontal grooves 105, bent portions 127b that are bent at the upper and lower ends of the heat radiating pipe side 111S are arranged.

In addition, either one of the upper and lower horizontal grooves 105 (in this embodiment, the lower horizontal groove 105) is the introduction groove 122 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. It is connected to.

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

Furthermore, one end of a communication member 124 that communicates the space 123 formed between the outer box 107 and the heat radiating pipe side 111S and the outside air is disposed in the lateral groove 105. The other end of the communication member 124 is disposed in a hole having an inner diameter larger than the outer diameter of the communication member 124 formed in the reinforcing member 200 formed to rise from the bottom surface of the outer box 107 to the back surface. An inter-component space 201 formed between the components of the reinforcing member 200 and the outer box 107 communicates with the outside air and discharges the air inside the lateral groove 105.

That is, the communication member 124 constituting the refrigerator in the present embodiment is configured to communicate with the outside air substantially linearly along the lateral groove 105. This configuration is realized by positioning the communication member 124 with the lateral groove 105 of the vacuum heat insulating material 103 and fixing the end of the communication member 124 using the reinforcing member 200.

Next, the 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. The high-temperature and high-pressure refrigerant discharged from the compressor 120 finally reaches a dryer (not shown) disposed in the machine chamber 126. In the meantime, particularly in the heat radiating pipe side 111S installed in the outer box 107, the refrigerant is cooled and liquefied by exchanging heat with the air outside the outer box 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 of the refrigerator constructed as described above and the vacuum heat insulating material attached to the refrigerator will be described below.

As in this embodiment, a layout configuration of a refrigerator in which the vegetable compartment 116 is installed downward and the refrigerator compartment 113 is installed upward 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 make a groove for embedding a heat radiating pipe with a bent shape other than a straight line, the vacuum heat insulating material can only be attached to the vicinity of the bent portion of the heat radiating pipe. . However, in the present 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 the vacuum heat insulating material. 103 is opened at the end. In the heat radiating pipe 111 formed by folding back between the straight portion 127a and the bent portion 127b, the straight portion 127a is arranged in the vertical groove 104 and the bent portion 127b is arranged in the horizontal groove 105. With this configuration, the entire heat radiating pipe 111 including the bent portion 127 b of the heat radiating pipe 111 can be covered with the vacuum heat insulating material 103.

The upper end portion of the vacuum heat insulating material 103 can be disposed to extend upward from the top surface portion of the inner box 108, and the lower end portion can be disposed to extend downward from the bottom surface portion of the inner box 108. With this configuration, the coverage of the vacuum heat insulating material 103 is improved, and heat entering from the outside or the heat radiating pipe 111 into the cabinet can be reduced, thereby saving energy.

Furthermore, the strength of the heat insulating box can be increased by improving the coverage of the vacuum heat insulating material 103 having higher bending elastic strength than the foam heat insulating material 109 to the outer box 107. Therefore, even when a load is applied to the refrigerator main body 112, deformation of the heat insulating box can be reduced. In order to realize a large capacity with high market needs without changing the external dimensions, it is essential to reduce the wall thickness. However, with the configuration of the present embodiment, the strength of the outer box at that time is ensured. It becomes possible to do.

In this 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. With this configuration, the thickness of the vacuum heat insulating material 103 positioned outside the bent portion 127b of the heat radiating pipe 111 in the vertical direction of the vacuum heat insulating material 103 can be set to a reference wall thickness without a groove. Therefore, the heat insulating property of the peripheral edge of the vacuum heat insulating material 103 used in the present embodiment can be improved as compared with the vacuum heat insulating material having the outer peripheral end surface as a groove and the outer end surface opened.

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. For this reason, the bending elastic strength of the thinned portion is lowered, and warpage of the vacuum heat insulating material is likely to occur. In the vacuum heat insulating material 103 of the present embodiment, most of the outer peripheral edge can be set to the reference wall thickness of a portion without a groove, and the bending elastic strength can be suppressed from being reduced, and the warpage of the vacuum heat insulating material can be prevented. . 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 this 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. With this configuration, the design freedom of the connecting pipe between the inlet portion of the heat radiating pipe 111 formed on the straight portion 127a and the bent portion 127b and the other surface of the outlet portion, which is affixed to the outer box 107 on one surface of the heat insulating box, is possible. The degree 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 of the refrigerator main body 112, it may be dealt with by using the open end portions of the vertical groove 104 and the horizontal groove 105. Therefore, since one vacuum heat insulating material 103 can respond to various piping designs, the vacuum heat insulating material 103 can be shared. Furthermore, by forming a plurality of vertical grooves 104 formed along the longitudinal direction of the vacuum heat insulating material 103, it is possible to cope with models with different pitches of the linear portion 127a of the heat radiating pipe 111, and the dual use of the vacuum heat insulating material 103 is further expanded. .

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. A way to do this is conceivable. When the vertical groove 104 and the horizontal groove 105 are configured to open 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.

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. With this configuration, even if the bent portion 127b of the heat radiating pipe 111 is designed to be large, it can be securely stored in the lateral groove 105. Furthermore, by setting the bend R of the bent portion 127b 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, in the lateral groove 105, not only the bent portion 127b 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. The pipe concentration rate can be increased. In this embodiment, the number of the heat radiating pipes 111 disposed in the horizontal groove 105 is two. However, the number of the heat radiating pipes 111 is not limited to two. Three or more may be embedded.

Also, the bent portion 127b of the heat radiating pipe 111 attached to the side surface of the refrigerator main body 112 is disposed corresponding to the vegetable compartment 116 and the refrigerator compartment 113. With this configuration, the thickness of the vacuum heat insulating material 103 positioned outside the bent portion 127b of the heat radiating pipe 111 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 enhanced.

Moreover, since the vacuum heat insulating material 103 can be attached to the lower part of the lowermost vegetable room 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 surface of the inner box 108 of the freezer compartment 117, the heat entering the vegetable compartment 116 is further reduced, and energy saving can be achieved.

As described above, in the refrigerator according to the present embodiment, the straight portion of the heat radiating pipe 111 formed by folding the straight portion 127a and the bent portion 127b is arranged in the vertical groove 104, and the bent portion 127b is arranged in the horizontal groove 105. With this configuration, the entire heat radiation pipe 111 including the bent portion 127b of the heat radiation pipe 111 can be covered with the vacuum heat insulating material 103, and the coverage of the vacuum heat insulating material 103 is improved. For this reason, heat entering from the outside or the heat radiating pipe 111 into the cabinet can be reduced, and energy saving can be achieved.

Furthermore, the strength of the heat insulating box 110 can be increased by improving the coverage of the vacuum heat insulating material 103 having a higher bending elastic strength than the foam heat insulating material 109 to the outer box 107. Therefore, even when a load is applied to the refrigerator main body 112, deformation of the heat insulating box 110 can be reduced.

Further, in the present embodiment, the upper and lower end surface portion 106 of the vacuum heat insulating material 103 is provided with a lateral groove 105 that crosses from the front surface to the back surface of the outer box 107 in a concave shape. As a result, the heat radiating pipe 111 can be covered with the lateral groove 105 from three directions, and the heat insulation performance can be improved.

Also, in order to attach the vacuum heat insulating material 103 and increase the coverage, the refrigerator cross-section wall had to be thickened to reduce the intrusion heat, and the internal capacity had to be reduced. However, 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 by forming the lateral grooves 105 in the bent portion 127b of the heat radiating pipe side 111S or the heat radiating pipe front 111F on the side surface of the refrigerator. became. Further, it can be applied with a high coverage, and the width of the lateral groove 105 is wider than the width of the vertical groove 104. This makes it possible to design a large bent diameter of the heat radiating pipe side 111S, and to ensure the reliability of the heat radiating pipe side 111S.

As described above, in the present embodiment, the upper and lower end surfaces of the vacuum heat insulating material 103 include the vertical groove 104 having a groove formed in the longitudinal direction on the surface of the vacuum heat insulating material 103 and the horizontal groove 105 having a groove formed in the short direction. Part 106 was formed. And the vertical groove 104 and the horizontal groove 105 were formed so that it might mutually cross | intersect at least on the plate-shaped surface, and the vacuum heat insulating material 103 was provided inside the warehouse of the heat radiating pipe side 111S. With this configuration, the folded portion of the heat radiating pipe side 111S can be disposed in the vacuum heat insulating material 103 without causing the heat radiating pipe side 111S to protrude, and further heat insulating performance can be improved.

Furthermore, since the upper and lower end surface portions 106 of the vacuum heat insulating material 103 are formed with the reference wall thickness, the strength of the upper and lower end surface portions 106 of the vacuum heat insulating material 103 is improved. Therefore, warpage and deformation of the vacuum heat insulating material 103 are minimized, and it is easy to attach the vacuum heat insulating material 103 to the refrigerator main body 112, and 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 the inflow when the foam heat insulating material 109 is filled. It is possible to prevent external deformation due to foaming pressure.

Further, since the vacuum heat insulating material 103 is formed in a rectangular shape and the vertical grooves 104 are provided more than the horizontal grooves 105, the length of the heat radiating pipe side 111S can be easily set according to the required performance of the refrigerator main body 112. It becomes.

Further, since the vacuum heat insulating material 103 is formed in a rectangular shape and the width of the lateral groove 105 is made wider than the width of the vertical groove 104, it is possible to design a large bending diameter of the radiating pipe side 111S to be buried. Therefore, it is possible to ensure the reliability of the heat radiating pipe side 111S or the heat radiating pipe front 111F.

Further, a space portion 123 is formed between the vertical groove 104 and the horizontal groove 105 of the vacuum heat insulating material 103, the outer box 107, and the heat radiating pipe side 111S or the heat radiating pipe front 111F. Then, one end of a communication member 124 that communicates the space 123 with the outside air is provided in the lateral groove 105. As a result, the air in the vertical groove 104 and the horizontal groove 105 can be easily ventilated with the outside air without being sealed, the pressure change due to the ambient temperature change or the like can be suppressed, and the external deformation of the outer box 107 can be suppressed. It becomes possible.

In addition, by providing the communication member 124 in the horizontal groove 105 having a groove width larger than that of the vertical groove 104, that is, having a small flow resistance, air staying in the plurality of vertical grooves 104 can flow to the horizontal groove 105 side in a short time. become. Further, since at least one of the heat radiating pipe side 111S and the heat radiating pipe front 111F can be arranged not only in the vertical groove 104 but also in the horizontal groove 105, the temperature of the air in the groove itself is also increased. Therefore, the air staying in the groove can be circulated more easily, and the smooth stay air can be discharged.

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. The air can be discharged to the outside air. Therefore, 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 an opening provided on the back surface of the foam. Then, a method is employed in which the foam heat insulating material 109 is foam-filled from the lower side (front opening side) toward the upper side (back side of the heat insulating box 110) gradually. In the present 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. For this reason, 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.

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

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

The lateral groove 105 extends along the short side direction of the vacuum heat insulating material 103 (that is, the front-rear direction of the refrigerator), and has no glue surface on the end surface. Further, one horizontal groove 105 is provided above and below the vertical groove 104, and the horizontal groove 105 and the vertical groove 104 are formed so as to intersect each other. Further, the horizontal groove 105 formed downward is disposed at least below the upper end of the bottom partition wall of the refrigerator main body 112 shown in FIG.

Also, at least one of the heat radiating pipe side 111S or the heat radiating pipe front 111F is connected to the lower lateral groove 105.

The heat radiating pipe front 111F is introduced from the periphery of the vacuum heat insulating material 103 to the lower side of the heat radiating pipe side 111S of the lower lateral groove 105. In the heat radiating pipe side 111 </ b> S, the straight portion 127 a is arranged in the vertical groove 104, and the bent portion 127 b is arranged in the horizontal groove 105. And the upper end part of the heat radiating pipe side 111S is arrange | positioned so that the exit groove | channel of the heat radiating pipe side 111S of the vertical groove 104 formed in the upper part of the upper horizontal groove 105 may be passed. With this configuration, almost the entire heat radiating pipe side 111 </ b> S meandering up and down is disposed between the vacuum heat insulating material and the outer box side plate without jumping out from the upper and lower end surface portions 106 of the vacuum heat insulating material 103.

Further, in the present embodiment, as shown in FIG. 7, the space 123 formed between the outer box 107 and the heat radiating pipe side 111S is communicated with the outside air in the lateral groove 105 as in the first embodiment. The communicating member 124 is disposed, and the air in the lateral groove 105 is released from the space communicating with the outside air of the outer box 107.

The communication member 124 includes a portion parallel to the lateral groove 105 and a bent and raised portion, and has a structure communicating with the outside air. A foaming jig is used to prevent deformation due to foaming pressure when the foam insulation material 109 is filled between the outer box 107 and the inner box 108. The portion of the communication member 124 that is bent and rises is formed for escape so that the heat radiating pipe 111 and the communication member 124 fixed to the outer box do not interfere with the foaming jig. Thereby, after filling the heat insulating box body 110 with the foam heat insulating material 109, the heat radiation pipe 111 and the communication member 124 can be pulled out and provided with a degree of freedom to be arranged at a predetermined position.

As described above, the lateral heat insulation pipe 111 and the communication member 124 can be freely pulled out by forming the lateral groove 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 face. It is possible to have a degree.

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 this embodiment, the upper and lower end surface portion 106 of the vacuum heat insulating material 103 does not have a glue surface, and a lateral groove 105 that crosses from the front surface to the back surface of the outer box 107 shown in FIG. 3 is provided. As a result, the communication member 124 is arranged in the same direction as the urethane filling direction, and the pressure is increased by the foaming pressure of the urethane, so that the air venting speed can be improved. Therefore, the air venting efficiency in the vertical grooves 104 and the horizontal grooves 105 is improved. Improvements can be made.

Further, since the communication member 124 is composed of a portion parallel to the lateral groove 105 and a bent and raised portion, the communication member 124 has a degree of freedom for pulling out the heat radiating pipe 111 and the communication member 124 and disposing them at a predetermined position. Can be made.

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

11 and 12, the heat radiating pipe 312 which is a part of the condenser of the cooling system (not shown) meanders so as to form a plurality of straight portions. An inlet portion 313 and an outlet portion 314 of the heat radiating pipe 312 protrude into a machine room 315 formed at the lower back of the refrigerator 301 and are connected to 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.

The vacuum heat insulating material 316 is applied to the outer box 302 so that the heat radiating pipe 312, the vertical groove 317, and the horizontal groove 318 are multilayered after an adhesive is applied to the surface on the outer box 302 side other than the vertical groove 317 and the horizontal groove 318. It is pasted.

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.

Also, 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 according to the present embodiment, 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 to the end of the vacuum heat insulating material 316. Further, the adhesive is applied to a surface other than the vertical groove 317 and the horizontal groove 318 on the surface of the vacuum heat insulating material 316 on the outer box 302 side. As a result, the foam heat insulating material 304 is filled in the vertical grooves 317 and the horizontal grooves 318, and air can be expelled, and no air layer is formed.

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

Further, 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 foam heat insulating material 304 is filled, the foam heat insulating material 304 enters, expands, and expands between the vacuum heat insulating material 316 and the outer box 302, so that the outer box 302 may be deformed by the expansion pressure.

On the other hand, since the refrigerator 301 in the present embodiment bonds the end of the vacuum heat insulating material 316 to the outer box 302, there is no possibility that the foam heat insulating material 304 enters. Therefore, deformation of the outer box 302 can be prevented, and a refrigerator with good appearance and high design can be obtained.

In addition, the refrigerator 301 in the present embodiment has a shape of the heat radiating pipe 312 that fits the crossed vertical groove 317 and the horizontal groove 318. The upper straight portion 319 of the heat radiating pipe 312 located on the upper side of the refrigerator and the lower straight portion 320 of the heat radiating pipe 312 located on the lower side of the refrigerator are formed on substantially the same straight line. Since each of the upper straight portion 319 and the lower straight portion 320 is disposed in one horizontal groove 318, the vacuum heat insulating material 316 is formed by stacking the vacuum heat insulating material 316 and the heat radiating pipe 312 with a small number of grooves. The deterioration of the heat insulation performance can be suppressed. As a result, the heat insulation 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. Like the vacuum heat insulating material 316 of the refrigerator in this embodiment, by reducing the number of grooves, deterioration of the heat insulating performance can be suppressed, and the refrigerator having high heat insulating performance and high efficiency can be obtained.

In the present embodiment, it has been described that the air in the groove is pushed out of the groove by being filled with the foam heat insulating material 304. Here, if the air vent member that communicates the inside and the outside of the groove, for example, the machine room 315, is provided, the air in the groove can be more reliably vented.

Further, in the present embodiment, the heat radiating pipe 312 has been described as being configured to be attached to the side surface of the refrigerator 301. However, the same effect can be obtained by using the same configuration also on the back surface of the refrigerator 301.

In the present embodiment, the inlet portion 313 and the outlet portion 314 are defined in the heat radiating pipe 312. However, the same is true even if the inlet portion 313 and the outlet portion 314 are reversed regardless of the refrigerant flow direction. The effect can be obtained.

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. However, this is a case where the vertically long vacuum heat insulating material 316 is used in accordance with the shape of the refrigerator 301. 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 has been described as being configured to be attached to the outer box 302. However, by adopting a configuration in which the heat radiating pipe is attached to the vacuum heat insulating material 316, it is possible to more surely prevent the gap between the heat radiating pipe 312 and the groove due to the attachment error of the heat radiating pipe 312 and to reduce the width of the groove. it can.

(Fourth embodiment)
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 in the fourth embodiment of the present invention. FIG. 15: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in the 4th Embodiment of this invention. The same configuration and the same technical idea as those of the first to third embodiments can be applied to this embodiment.

As shown in FIG. 13 to FIG. 15, the heat radiating pipe 321 aims to improve heat radiating efficiency, and in order to secure the length, the connecting portion 322 is attached to the left and right of the outer box 302 so It is configured to connect pipes.

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) that pivotally supports the heat insulating door 307 on the front surface of the top surface. In addition, a handle portion (not shown) is provided on the backmost surface for handling the refrigerator 301 when it is transported. For this reason, it is difficult to provide a connecting portion on the backmost surface or the frontmost surface of the refrigerator 301.

Therefore, the connection part 322 is provided in the substantially center part of the front-back direction of the refrigerator 1 top surface. For this reason, the heat radiating pipe 321 meanders up and down, and is once bent toward the front of the refrigerator 301 at the upper part of the back surface. Then, it is bent upward at a position substantially in line with the longitudinal straight portion of the meandering heat radiation pipe 321 at the substantially central portion in the front-rear direction of the refrigerator 301 and connected to the connecting portion 322.

Since the vertical grooves 317 and the horizontal grooves 318 are provided in the vacuum heat insulating material 316 so as to cross each other, the vertically extending heat radiating pipe 321 connected to the connecting portion 322 and the vertically extending heat radiating pipe 321 are in the same vertical direction. The groove 317 can be multilayered, and the connection portion 322 can be connected.

Therefore, even when the heat radiating pipes 321 are provided on the left and right sides of the refrigerator 301 and connected at the top surface, the vacuum heat insulating material 316 and the heat radiating pipe 321 can be formed in multiple layers without increasing the number of grooves. Therefore, the heat insulation performance deterioration by forming a groove | channel in the vacuum heat insulating material 316 can be suppressed, and it can be set as a highly efficient refrigerator with high heat insulation performance.

In this embodiment, the connecting portion 322 is the top surface of the refrigerator 301. However, the connecting portion 322 is attached to the back surface of the refrigerator 301 by bending the heat radiating pipe 321 to the back side and bending the heat sink pipe 321 to the back surface side. Even if configured, the same effect can be obtained.

(Fifth embodiment)
FIG. 16: is a front view of the vacuum heat insulating material and heat radiating pipe of the refrigerator in the 5th Embodiment of this invention. The same configuration and technical idea as those 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. That is, 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 the refrigerators in the third embodiment and the fourth embodiment, since there is no groove at a position where the heat radiating pipe 324 does not pass, the number of grooves can be further reduced.

Therefore, the vacuum heat insulating material 323 and the heat radiating pipe 324 can be multilayered without increasing the number of grooves, deterioration of the 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.

As described above, in the refrigerator of the present invention, the heat insulating box constituting the refrigerator has the outer box, the inner box, and the heat radiating pipe attached to the outer box. Further, the heat insulating box includes a vacuum heat insulating material that forms a groove that covers the heat radiating pipe and is attached to the outer box, and a foam heat insulating material that is filled between the outer box and the inner box. And it arrange | positions with a vacuum heat insulating material so that the upper end part of a vacuum heat insulating material may extend upwards from the top | upper surface part of an inner box.

This configuration improves the coverage of the vacuum heat insulating material and reduces the intrusion heat from the top surface heat radiating pipe, thereby saving energy. Furthermore, the strength of the outer box can be ensured even if the vacuum heat insulating material is expanded and the refrigerator sectional wall is thinned to increase the internal capacity.

In the present invention, the groove formed in the vacuum heat insulating material includes a vertical groove and a horizontal groove, the vertical groove and the horizontal groove intersect each other, and the vertical groove and the horizontal groove may be opened at the end of the vacuum heat insulating material. Good. By arranging the straight part of the heat-dissipating pipe folded back between the straight part and the bent part in the vertical groove and the bent part in the horizontal groove, the entire heat-dissipating pipe including the bent part of the heat-dissipating pipe can be covered with the vacuum heat insulating material. . Furthermore, the heat insulation property of the vacuum heat insulating material located outside the bent portion of the heat radiating pipe can be enhanced.

In the present invention, the vacuum heat insulating material may be formed in a rectangular shape, the vertical groove may be formed along the longitudinal direction of the vacuum heat insulating material, and the lateral groove may be formed along the short direction of the vacuum heat insulating material. Thereby, a heat radiating pipe and a vacuum heat insulating material can be efficiently embedded in the outer box of the heat insulating box formed vertically.

In the present invention, the width of the lateral groove may be wider than the width of the vertical groove. Thereby, even if the bending part of a heat radiating pipe is designed large, it can be reliably accommodated in a groove | channel.

In the present invention, the heat radiating pipe may be disposed below the top surface portion of the inner box and above the bottom surface portion of the inner box. The thickness of the vacuum heat insulating material located outside the bent portion of the heat radiating pipe can be set to a reference wall thickness without a groove, and the heat insulating property of the vacuum heat insulating material periphery can be enhanced.

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.

10, 110, 306

Heat insulation box

14, 101

Core material

31, 107, 302

Outer box

33, 111, 312, 321, 324

Radiation pipe

41, 109, 304 Foam insulation 102

Gas barrier film

103, 316, 323

Vacuum insulation Materials

104, 317

Vertical grooves

105, 318 Horizontal grooves 106 Upper and lower end surfaces 108, 303 Inner box 111F Radiation pipe front 111S Radiation pipe side 112 Refrigerator body 113 Refrigeration room 114 Switching room 115 Ice making room 116 Vegetable room 117 Freezer room 118 Cooler 119 Cold air Blower fan 120 Compressor 121 Capillary tube 123 Space part 124 Communication member 125 Exit groove 126,315 Machine room 127a Straight line part 127b Bent part 130 Cooling room 200 Reinforcement member 201 Space between parts

Claims

An outer box, an inner box, a heat radiating pipe affixed to the outer box, a vacuum heat insulating material affixed to the outer box by forming a groove that covers the heat radiating pipe, and a space between the outer box and the inner box And a heat insulating box having a foamed heat insulating material, wherein the vacuum heat insulating material is arranged so that an upper end portion of the vacuum heat insulating material extends above a top surface portion of the inner box. refrigerator.
The groove formed in the vacuum heat insulating material includes a vertical groove and a horizontal groove, the vertical groove and the horizontal groove intersect each other, and the vertical groove and the horizontal groove are opened at an end portion of the vacuum heat insulating material. The refrigerator according to claim 1.
The vacuum heat insulating material is formed in a rectangular shape, the vertical groove is formed along a longitudinal direction of the vacuum heat insulating material, and the lateral groove is formed along a short direction of the vacuum heat insulating material. Item 3. The refrigerator according to Item 2.
4. The refrigerator according to claim 2, wherein a groove width of the horizontal groove is wider than a groove width of the vertical groove. 5.
The refrigerator according to any one of claims 1 to 3, wherein the heat radiating pipe is disposed below the top surface portion of the inner box and above the bottom surface portion of the inner box.