JP2013019608A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of preventing the occurrence of poor appearance.SOLUTION: The refrigerator includes: a heat insulating casing 10 comprising an inner casing 12, an outer casing 11 made of metal and a foam heat insulator filling a space between the inner casing and the outer casing; a heat radiation pipe 33, which is extended in one direction and arranged into a plurality of parallel lines with both ends meandering, and arranged in contact with an inner surface of the outer casing 11, and which has an extension 33a in one end extending outside the heat insulating casing 10; and a vacuum heat insulator 21, which comprises a core material 25 covered with a cladding 26 and has a plurality of grooves 22 arranged in parallel where the inner pressure is reduced and the heat radiation pipe 33 is to be fitted, and which is mounted on the inner surface of the outer casing 11. A communication path 43a that communicates the outside of the heat insulating casing 10 and the grooves 22 is formed in the periphery of the extension 33a to communicate the grooves 22 adjoining in the parallel arrangement direction.

Description

  The present invention relates to a refrigerator provided with a vacuum heat insulating material in a heat insulating box.

  Conventional refrigerators are disclosed in Patent Document 1 and Patent Document 2. In these refrigerators, the housing of the main body is constituted by a heat insulating box filled with a foam heat insulating material between the outer box and the inner box. A heat radiating pipe is provided on the inner surface side of the outer box, and a vacuum heat insulating material is provided in contact with the heat radiating pipe. At this time, a groove portion into which the heat radiating pipe is fitted is provided on one surface of the vacuum heat insulating material.

  The heat radiating pipe is attached to the inner surface of the outer box with an adhesive tape. Thereby, the heat radiating pipe and the outer box can be stably brought into contact with each other, and the heat of the heat radiating pipe can be efficiently transmitted to the outer box.

However, as a global trend in recent years, there is a demand for reduction of environmental load such as resource saving, energy saving, and CO ₂ emission reduction accompanying product transportation in product manufacturing. For this reason, it is indispensable to reduce the thickness of the metal outer box in order to improve the effective internal volume (space saving and storage capacity) capable of storing stored items while maintaining the conventional outer diameter. However, in addition to a decrease in strength due to the thinning of the outer box, the following problems become apparent when the heat insulating box is constituted by a composite of a vacuum heat insulating material and a foam heat insulating material.

  In general, the constituent material of the foam heat insulating material reacts to generate carbon dioxide, and the gap between the groove portion of the vacuum heat insulating material and the inner surface of the outer box is filled with carbon dioxide gas (including a foaming agent such as cyclopentane). At this time, the total gas pressure in the groove of the vacuum heat insulating material in the initial state is substantially equal to the atmospheric pressure outside the heat insulating box. On the other hand, if the pressure difference is constant, the permeation ability of a gaseous substance is generally expressed by the product of (gas diffusion coefficient) and (gas solubility in a target substance). Among these, the diffusion coefficient of gas is not significantly different between carbon dioxide gas, nitrogen and oxygen under the same conditions at normal temperature and pressure, but the solubility of carbon dioxide gas in polyurethane of the foam insulation is higher than nitrogen and oxygen.

  For this reason, nitrogen and oxygen in the atmosphere gradually permeate the foam heat insulating material and permeate into the groove portion of the vacuum heat insulating material due to respective partial pressure differences with respect to nitrogen and oxygen in the groove portion. On the other hand, the carbon dioxide gas in the groove penetrates the foam heat insulating material faster than nitrogen or oxygen due to a partial pressure difference with the atmosphere and escapes to the outside. Thereby, the total gas pressure in the groove is temporarily reduced from atmospheric pressure. Accordingly, the outer box is recessed inward along the groove portion of the vacuum heat insulating material due to the difference in pressure between the inside and the outside of the heat insulating box. Further, when carbon dioxide escapes to the outside of the heat insulation box and oxygen and nitrogen in the atmosphere sufficiently penetrate into the groove portion of the vacuum heat insulating material to reach an equilibrium state, the pressure difference between the groove portion and the atmosphere disappears and the dent returns. However, since it takes a long time for the dent to return, there is a problem that the outer appearance of the outer box is impaired.

  In order to solve this problem, in the refrigerator of Patent Document 1, a heat radiating pipe is embedded in a vacuum heat insulating material so that the gap between the grooves is made as narrow as possible. Further, a filler is injected into the gap of the groove. Thereby, it can prevent that a carbon dioxide gas fills a groove part. Moreover, in the refrigerator of patent document 2, one end of the adhesive tape affixed on a heat radiating pipe is located outside a refrigerator, and the other end is arrange | positioned inside from the edge part of a vacuum heat insulating material. Thereby, the gas flow path connected to the outside air from the gap of the groove portion is formed by the adhesive tape, and the gas in the gap between the vacuum heat insulating material and the outer box can be discharged.

JP 2007-198622 A JP 2004-28349 A

  However, according to the conventional refrigerator described above, in the refrigerator of Patent Document 1, it is difficult to accurately assemble long heat radiation pipes arranged in a plurality of rows on the inner surface of the outer box into narrow grooves provided in the vacuum heat insulating material. there were. In addition, it is difficult to control the amount of filler injected into the groove. For this reason, there is a problem in that the filling material overflows from the groove and the sticking becomes uneven in the region where the inner surface of the outer box and the vacuum heat insulating material are in contact with each other.

  Moreover, in the refrigerator of patent document 2, the adhesive tape is affixed only with respect to the heat radiating pipe which leads to the machine room. For this reason, the gas flow path to external air is not formed in the other heat radiating pipe arranged in parallel. Therefore, there has been a problem that an outer appearance defect of the outer box occurs in a groove portion into which another heat radiating pipe arranged in parallel fits.

  An object of this invention is to provide the refrigerator which can prevent generation | occurrence | production of the appearance defect.

  In order to achieve the above object, the present invention provides a heat insulating box filled with a foam heat insulating material between an inner box and a metal outer box, and a state in which the lines extend in one direction and are arranged in parallel in a plurality of rows. A heat-dissipating pipe that is arranged in contact with the inner surface of the outer box and has an extending portion that extends to the outside of the heat-insulating box body, and the core material is covered with an outer covering material to reduce the inside, and the heat-dissipating pipe is fitted. A plurality of groove portions arranged in parallel and provided on the inner surface of the outer box, and a communication passage that communicates the outside of the heat insulation box body with the groove portion, between the groove portions adjacent to each other in the juxtaposition direction. It is characterized by having communicated.

  According to this configuration, the outside of the heat insulation box communicates with the groove through the communication path. Thereby, the permeation | transmission of the gas to a groove part becomes dominant (passage | through of a communicating path) instead of (penetration in a foam heat insulating material). That is, the influence of (solubility with respect to the foam insulation) on gas permeation is reduced, and the influence of (gas diffusion coefficient) is increased. The diffusion coefficient does not differ greatly between carbon dioxide, nitrogen, and oxygen. For this reason, the speed difference between the outflow of carbon dioxide gas from the groove portion through the communication path to the outside of the heat insulation box and the inflow of nitrogen and oxygen from the outside of the heat insulation box to the groove portion is eliminated. Thereby, the partial pressure of each gas in the groove is balanced with the partial pressure of each gas in the atmosphere with a small time difference. Further, each gas smoothly flows between the outside air and the groove portion through the communication path. Thereby, the pressure difference between the total gas pressure in the grooves adjacent to each other in the juxtaposed direction and the outside of the heat insulating box is eliminated in a short time.

  Further, in the refrigerator configured as described above, an end portion in a direction in which the groove portion extends is fixed to the outer box by a first adhesive tape in which the vacuum heat insulating material crosses each of the heat radiating pipes, and the first adhesive tape or A space part facing the end face of the vacuum heat insulating material and the outer box is formed by a heat-welded part obtained by heat-welding the periphery of the jacket material. According to this configuration, the grooves adjacent to each other in the juxtaposed direction communicate with each other in the space.

  According to the present invention, the heat radiating pipe is fixed to the outer box by a second adhesive tape disposed along the extending direction, and the first gas flow path and the second gas flow by the second adhesive tape in the groove portion. It is partitioned by a path, and at least one end of the second adhesive tape does not intersect the first adhesive tape. According to this configuration, the first gas channel and the second gas channel communicate with each other at one end of the second adhesive tape that does not intersect the first adhesive tape.

  According to the present invention, the heat radiating pipe is fixed to the outer box by a second adhesive tape disposed along the extending direction, and the first gas flow path and the second gas flow are formed in the groove portion by the second adhesive tape. The second adhesive tape is provided with a through hole that is partitioned by a path. According to this configuration, the first gas channel and the second gas channel communicate with each other through the through hole.

  According to the present invention, a heat radiating pipe between the extension part and the first adhesive tape is fixed to the outer box by a third adhesive tape, and the communication path is formed inside the third adhesive tape. It is said.

  Further, according to the present invention, the heat radiating pipe is fixed to the outer box by a first adhesive tape that crosses both ends in the extending direction in the juxtaposed direction, and is arranged along the extending direction so as to overlap the first adhesive tape. The second adhesive tape is fixed to the outer box by two adhesive tapes, the second adhesive tape extends to the outside of the heat insulating box to form the communication path, and the first gas flow path and the second are formed in the groove by the second adhesive tape. The first gas flow path and the inside of the first adhesive tape communicate with each other by being partitioned by the gas flow path, and a through hole is provided in the second adhesive tape.

  Further, the present invention is characterized in that the communication path is formed by performing a mold release process on the inner surface of the outer box or the periphery of the heat radiating pipe.

  According to this configuration, the foam heat insulating material does not adhere to the region subjected to the mold release process. Thereby, a clearance gap is formed between the contact surface of the surroundings of a heat radiating pipe and a foam heat insulating material, and becomes a communicating path. Gas passing through the communication passage does not permeate the foam insulation. For this reason, in the permeation | transmission of gas, the influence by (gas diffusion coefficient) becomes large. The diffusion coefficient does not differ greatly between carbon dioxide, nitrogen, and oxygen. Thereby, the speed difference between the outflow of carbon dioxide gas from the groove portion to the outside of the heat insulation box body through the gap and the inflow of nitrogen and oxygen from the outside of the heat insulation box body to the groove portion is eliminated. Therefore, the partial pressure of each gas in the groove is balanced with the partial pressure of each gas in the atmosphere with a small time difference. Thereby, the pressure difference between the total gas pressure in the grooves adjacent to each other in the juxtaposed direction and the outside of the heat insulating box is eliminated in a short time.

  Moreover, this invention is bundled by the 4th adhesive tape which the some adjacent heat radiating pipe between the said extension part and the 1st adhesive tape winds in the circumferential direction, and the said communicating path is the inner peripheral side of the 4th adhesive tape. It is characterized by being formed.

  According to this structure, a foaming heat insulating material does not adhere | attach on the inner peripheral side of the 4th adhesive tape wound around a some thermal radiation pipe. Thereby, a clearance gap is formed between the bundled plurality of heat radiation pipes and the fourth adhesive tape to form a communication path.

  Further, the present invention is characterized in that the vacuum heat insulating material has a communication groove that communicates with the groove portion adjacent to and intersecting the groove portion.

  According to this configuration, the gas in the groove portion flows out of the heat insulating box body, and the gas flowing into the communication path from the outside of the heat insulating box member flows between adjacent groove portions via the communication groove.

  According to the present invention, the gas in the grooves adjacent to each other in the juxtaposition direction flows out of the heat insulating box through the communication path. At the same time, outside air flows into the groove portion from the outside of the heat insulating box through the communication path. The outside air that has flowed into the grooves flows into the grooves adjacent to each other in the juxtaposition direction. Thereby, the atmospheric | air pressure difference of the internal pressure of the whole adjacent groove part and the heat insulation box exterior is eliminated. Accordingly, it is possible to prevent deformation of the outer box due to a difference in atmospheric pressure between the inside and the outside of the heat insulating box and to prevent appearance defects.

The disassembled perspective view which shows the refrigerator of 1st Embodiment of this invention. The perspective view which shows a part of outer box which concerns on the refrigerator of 1st Embodiment of this invention. The top view which expands and shows a part of outer box which concerns on the refrigerator of 1st Embodiment of this invention. AA sectional view in FIG. BB sectional view in FIG. CC sectional view in FIG. The top view which expands and shows a part of outer box which concerns on the refrigerator of 2nd Embodiment of this invention. The top view which expands and shows a part of outer box which concerns on the refrigerator of 3rd Embodiment of this invention. The top view which shows a part of outer box which concerns on the refrigerator of 4th Embodiment of this invention. The top view which shows a part of outer box which concerns on the refrigerator of 5th Embodiment of this invention. The top view which expands and shows a part of outer box which concerns on the refrigerator of 6th Embodiment of this invention. DD sectional view in FIG.

[First embodiment]
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing the refrigerator of the present embodiment, FIG. 2 is a perspective view showing a part of the outer box 11, and FIG. 3 is a plan view showing a part of the outer box 11 in an expanded state. .

  The heat insulating box 10 of the refrigerator 1 has a box shape with an open front. The outer surface of the heat insulation box 10 is formed by the outer box 11, and the inner surface is formed by the inner box 12. The outer box 11 is formed in a box shape whose front is opened by a top plate 11a made of a metal plate such as an iron plate, side plates 11b and 11e, a back plate 11c and a bottom plate 11d. The inner box 12 is made of a resin molded product, and is divided into a plurality of cooling chambers whose front surfaces are open. Between the outer box 11 and the inner box 12, a foam heat insulating material (not shown) such as urethane foam is filled. A machine room 61 is provided below the bottom plate 11 d, and the machine room 61 is disposed outside the heat insulating box 10.

  Side plates 11b and 11e are connected to both sides of the top plate 11a. The side plates 11b and 11e are bent from the developed state to form the outer box 11. A heat radiating pipe 33 is disposed in contact with the inner surface of the outer box 11 on the inner surface side of the side plates 11b and 11e and the top plate 11a. The heat radiating pipes 33 extend in one direction and are arranged in a plurality of rows by meandering. A plurality of the second adhesive tapes 42 are arranged along the rows of the heat radiating pipes 33 in the extending direction. The heat radiating pipe 33 is attached to the inner surface of the outer box 11 by the second adhesive tape 42.

  The heat radiating pipe 33 has an extending portion 33a at one end. The extending portion 33 a extends to the machine room 61 provided outside the heat insulating box 10. The extending portion 33 a is attached to the inner surface of the outer box 11 by the third adhesive tape 43. The heat radiating pipe 33 between the extending portion 33 a and the first adhesive tape 41 a is fixed to the outer box 11 by the third adhesive tape 43. The vacuum heat insulating material 21 is disposed on the inner surface side of the heat radiating pipe 33 from above the second adhesive tape 42 and the third adhesive tape 43.

  The vacuum heat insulating material 21 has a rectangular shape and is provided on each of the side plates 11b and 11e. At this time, it arrange | positions so that the edge parts 26a and 26b of the vacuum heat insulating material 21 may traverse the heat radiating pipe 33 arranged in parallel in multiple rows. The end portions 26a and 26b are fixed to the outer box 11 by the first adhesive tapes 41a and 41b.

  4 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is a cross-sectional view taken along line BB in FIG. The vacuum heat insulating material 21 encloses the core material 25 in a bag-shaped outer covering material 26. The core material 25 is formed by laminating a plurality of nonwoven fabrics (not shown). The inside of the jacket material 26 is decompressed by evacuating the core material 25 as a spacer. The end portions 26a and 26b of the jacket material 26 are formed in heat weld portions 27a and 27b that are heat welded with a predetermined width. The core material 25 is sealed inside the jacket material 26 by the heat welding parts 27a and 27b. The jacket material 26 is formed by folding back one laminated film and thermally welding the three sides including the heat welding portions 27a and 27b. The heat welding parts 27a and 27b are stuck to the outer box 11 without being folded. For this reason, it is possible to prevent the outer covering material 26 from being broken due to unnecessary stress applied to the heat welding portions 27a and 27b. Therefore, the vacuum break inside the jacket material 26 is prevented.

  Further, at the end portion 26 a of the jacket material 26, a space portion 29 a facing the end surface 28 a of the vacuum heat insulating material 21 and the outer box 11 is formed by the heat welding portion 27 a. Similarly, at the end portion 26 b of the jacket material 26, the end surface 28 b of the vacuum heat insulating material 21 and the space portion 29 b facing the outer box 11 are formed by the heat welding portion 27 b. One end of the first adhesive tape 41a, 41b is attached so as to face the end portions 26a, 26b of the vacuum heat insulating material 21, and the space 29a is formed by the first adhesive tape 41a, 41b straddling the vacuum heat insulating material 21 and the outer surface 11. 29b may be formed.

  6 is a cross-sectional view taken along the line CC of FIG. The vacuum heat insulating material 21 is formed with a concave groove 22 into which the heat radiating pipe 33 is fitted. The groove portion 22 extends in the same direction as the heat radiating pipe 33. When the heat radiating pipe 33 is fitted into the groove 22, the vacuum heat insulating material 21 contacts the inner surface of the outer box 11 in a region other than the groove 22. The inside of the groove part 22 is partitioned into a first gas flow path 22a and a second gas flow path 22b through a second adhesive tape.

  Both ends of the groove portion 22 communicate with the space portions 29a and 29b, respectively. Thereby, between the groove parts 22 adjacent in the juxtaposed direction communicates in the space parts 29a and 29b.

  As shown in FIG. 4, one end of the second adhesive tape 42 that partitions the groove 22 intersects the first adhesive tape 41a. For this reason, the 1st gas flow path 22a covered by the lower part of the 2nd adhesive tape 42 does not connect with the space part 29a. On the other hand, the second gas flow path 22b formed in the upper part of the second adhesive tape 42 communicates with the space 29a. Therefore, the first gas flow paths 22a adjacent to each other in the juxtaposed direction do not communicate with each other in the space 29a, but the second gas flow paths 22b communicate with each other in the space 29a.

  As shown in FIG. 5, the other end of the second adhesive tape 42 does not cross the first adhesive tape 41b. For this reason, the first gas channel 22a and the second gas channel 22b communicate with the space 29b. Therefore, the first gas flow path 22a and the second gas flow path 22b adjacent to each other in the juxtaposed direction communicate with each other in the space portion 29b. In addition, the first gas flow path 22a and the second gas flow path 22b that are partitioned vertically in the space portion 29b also communicate with each other. In addition, when the 2nd adhesive tape 42 has interrupted in the groove part 22, the 1st gas flow path 22a and the 2nd gas flow path 22b are connected in the interrupted edge part in the groove part 22. FIG.

  The heat radiating pipe 33 between the extending portion 33 a and the first adhesive tape 41 a is attached to the outer box 11 with the third adhesive tape 43. One end of the third adhesive tape 43 extends to the extending portion 33a. On the other hand, the other end of the third adhesive tape 43 extends so as to overlap one end of the second adhesive tape 42. Further, the first adhesive tape 41 a intersects from the third adhesive tape 43. A communication path 43a is formed in the air space between the lower part of the third adhesive tape 43 and the heat radiating pipe 33 and the side plate 11b. One end of the communication passage 43 a communicates with the first gas flow path 22 a at the overlapping portion with the second adhesive tape 42. The other end of the communication path 43a communicates with the outside of the heat insulating box 10. Note that one end of the third adhesive tape 43 may be provided in the space 29 a without overlapping the second adhesive tape 42. In this case, the communication path 43a, the first gas flow path 22a, and the second gas flow path 22b communicate with each other through the space 29a.

  In addition, the 1st adhesive tapes 41a and 41b, the 2nd adhesive tape 42, and the 3rd adhesive tape 43 are metal foil adhesive tapes which have aluminum foil. Thereby, the heat of the heat radiating pipe 33 can be efficiently conducted to the outer box 11 to enhance the heat radiating effect.

  According to the present embodiment, by providing the communication passage 43 a that communicates the outside of the heat insulating box 10 with the groove portion 22, outside air (nitrogen or oxygen) flows into the groove portion 22 through the communication passage 43 a. In addition, by communicating between the adjacent groove portions 22 in the juxtaposed direction, outside air also flows between the adjacent groove portions 22. At the same time, the carbon dioxide gas in the groove 22 flows out of the heat insulating box 10 in the reverse flow. Thereby, the permeation | transmission of the gas to the groove part 22 becomes dominant (passage | through of the communicating path 43a) instead of (penetration in a foam heat insulating material). That is, the influence of (solubility with respect to the foam insulation) on gas permeation is reduced, and the influence of (gas diffusion coefficient) is increased. The diffusion coefficient does not differ greatly between carbon dioxide, nitrogen, and oxygen. For this reason, the speed difference between the outflow of carbon dioxide gas from the groove portion 22 to the outside of the heat insulating box body 10 through the communication passage 43a and the inflow of nitrogen and oxygen from the outside of the heat insulating box body 10 to the groove portion 22 is eliminated. As a result, the partial pressure of each gas in the groove 22 is balanced with the partial pressure of each gas in the atmosphere with a small time difference. Further, each gas smoothly flows through the outside of the heat insulating box 10 and the inside of the groove portion 22 through the communication passage 43a. Thereby, the atmospheric pressure difference between the total gas pressure in the groove portions 22 adjacent to each other in the juxtaposed direction and the outside of the heat insulating box 10 is eliminated in a short time. Accordingly, it is possible to prevent deformation of the outer box 11 due to a pressure difference between the inside and the outside of the heat insulating box 10 and to prevent appearance defects.

  Further, the end portions 26 a and 26 b in the direction in which the groove portion 22 extends are fixed to the outer box 11 by the first adhesive tapes 41 a and 41 b where the vacuum heat insulating material 21 crosses each heat radiating pipe 33. At this time, the end portions 28a and 28b of the vacuum heat insulating material 21 and the space portions 29a and 29b facing the outer box 11 are formed by the heat-welded portions 27a and 27b that are heat-welded around the first adhesive tapes 41a and 41b or the jacket material 26. It is formed. Thereby, the adjacent groove parts 22 can be easily communicated.

  Further, the heat radiating pipe 33 is fixed to the outer box 11 by the second adhesive tape 42 arranged along the extending direction. Thereby, the heat of the heat radiating pipe 33 can be efficiently conducted to the outer box 11 to enhance the heat radiating effect. In addition, the second adhesive tape 42 divides the first gas flow path 22 a and the second gas flow path 22 b in the groove 22, and at least one end of the second adhesive tape 42 does not intersect the first adhesive tape 41. Thereby, the 1st gas flow path 22a and the 2nd gas flow path 22b can be connected in the space part 29b of the end which does not cross | intersect the 1st adhesive tape 41 of the 2nd adhesive tape 42. FIG.

  Further, the heat radiating pipe 33 between the extending portion 33 a and the first adhesive tape 41 a is fixed to the outer box 11 by the third adhesive tape 43, and the communication path 43 a is formed inside the third adhesive tape 43. Thereby, the communicating path 43a can be formed easily.

  In addition, you may connect the adjacent groove part 22 by another method. For example, the vacuum heat insulating material 21 can be provided with a communication groove (not shown) that communicates with the adjacent groove portion 22 across the groove portion 22. Thereby, between the adjacent groove parts 22 can be simply communicated via a communicating groove.

[Second Embodiment]
FIG. 7 is a plan view showing a part of the outer box 11 relating to the refrigerator according to the second embodiment. In addition, the same part as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In contrast to the first embodiment, in the second embodiment, the first adhesive tape 41b is omitted and only the first adhesive tape 41a is provided.

  The end portions 26a and 26b of the vacuum heat insulating material 21 cross the heat radiating pipes 33 arranged in a plurality of rows. Further, the end portion 26a is fixed to the outer box 11 by the first adhesive tape 41a. On the other hand, the end portion 26b is not fixed to the outer box 11 by the first adhesive tape 41b (see FIG. 3). For this reason, although the space part 29a is formed in the edge part 26a of the jacket material 26, a space part is not formed in the edge part 26b. On the other hand, the second adhesive tape 42 is formed with a plurality of through holes 42a. Thereby, the 1st gas flow path 22a and the 2nd gas flow path 22b are connected via the through-hole 42a.

  According to this embodiment, the outside air that has flowed into the first gas flow path 22a from the communication path 43a flows into the second gas flow path 22b through the through hole 42a. The outside air that has flowed into the second gas flow path 22b flows into the adjacent second gas flow path 22b in the space 29a. In each second gas flow path 22b, outside air flows into the first gas flow path 22a through the through hole 42a. At the same time, the carbon dioxide gas in the groove 22 flows out of the heat insulation box 10 in the reverse flow. Thereby, the atmospheric | air pressure difference of the internal pressure of the adjacent groove part 22 and the heat insulation box 10 exterior is eliminated. Accordingly, it is possible to prevent deformation of the outer box 11 due to a pressure difference between the inside and the outside of the heat insulating box 10 and to prevent appearance defects.

  In addition, when the capacity | capacitance of the 1st gas flow path 22a is overwhelmingly small compared with the 2nd gas flow path 22b, the volume of the carbon dioxide gas which accumulates in the 1st gas flow path 22a is also small. In this case, the carbon dioxide gas accumulated in the first gas flow path 22a hardly affects the deformation of the outer box 11. At this time, the through holes 42a may not be provided in the second adhesive tape 42, and one end of the third adhesive tape 43 may be provided in the space 29a to communicate each second gas flow path 22b with the outside air. In addition, even when only one through hole 42a is provided in the second adhesive tape 42 connected to the communication passage 43a, the outside air can communicate with each second gas flow path 22b, and a certain effect can be obtained to prevent the deformation of the outer box 11. Have. Moreover, the same effect can be acquired even if it forms a notch in the 2nd adhesive tape 42 instead of the through-hole 42a.

  Moreover, you may affix on the heat radiating pipe 33, sending the 2nd adhesive tape 42 wound by roll shape with the roller provided with a spike-shaped punch. Thereby, the 2nd adhesive tape 42 in which the through-hole 42a was formed in the predetermined space | interval can be easily affixed on the thermal radiation pipe 33. FIG.

  The through hole 42a is preferably formed so as to avoid the central portion of the second adhesive tape 42 in contact with the heat radiating pipe 33. Moreover, it is more preferable to form the through holes 42a on both sides of the second pressure-sensitive adhesive tape 42 with the central portion of the axis line in between. Thereby, even when the 2nd adhesive tape 42 shifts | deviates from an axial center part and is affixed on the heat radiating pipe 33, ventilation | gas_flowing of the through-hole 42a is securable.

  The second adhesive tape 42 may be a mesh or porous tape that can ensure ventilation.

[Third embodiment]
FIG. 8 is a plan view showing a part of the outer box 11 relating to the refrigerator according to the third embodiment. In addition, the same part as 1st Embodiment and 2nd Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In the third embodiment, the first adhesive tapes 41a and 41b are not attached to the vacuum heat insulating material 21 as compared to the first and second embodiments.

  The heat radiating pipe 33 is fixed to the outer box 11 by first adhesive tapes 41a and 41b that cross both ends in the extending direction in the juxtaposed direction. Moreover, it is fixed to the outer box 11 by a second adhesive tape 42 that overlaps the first adhesive tape 41 and is arranged along the extending direction. The second adhesive tape 42 extends outside the heat insulating box 10 to form a communication path. The inside of the groove 22 is partitioned into a first gas flow path 22a and a second gas flow path 22b by a second adhesive tape 42, and the first gas flow path 22a and the inside of the first adhesive tape 41 communicate with each other. . The second adhesive tape 42 is provided with a through hole 42a.

  According to this embodiment, outside air (nitrogen or oxygen) flows into the first gas flow path 22a through the communication path 43a. The outside air that has flowed into the first gas flow path 22a flows into the second gas flow path 22b through the through hole 42a. Further, the first gas channel 22a and the second gas channel 22b are not branched. For this reason, the outside air that has flowed from the communication path 43a flows through the first gas flow path 22a and the second gas flow path 22b, and flows into the entire groove portion 22. At the same time, the carbon dioxide gas in the groove 22 flows out of the heat insulation box 10 in the reverse flow. Thereby, the atmospheric | air pressure difference of the internal pressure of the adjacent groove part 22 and the heat insulation box 10 exterior is eliminated. Accordingly, it is possible to prevent deformation of the outer box 11 due to a pressure difference between the inside and the outside of the heat insulating box 10 and to prevent appearance defects.

[Fourth embodiment]
FIG. 9 is a plan view showing a part of the outer box 11 according to the refrigerator according to the fourth embodiment. In addition, the same part as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In the fourth embodiment, the third adhesive tape 43 is not attached to the first embodiment and the second embodiment.

  A mold release process is performed around the heat radiating pipe 33 between the extending portion 33a and the first adhesive tape 41a. Further, one end of the region 53 that has been subjected to the mold release process overlaps with one end of the second adhesive tape 42. The other end of the region 53 subjected to the mold release process extends to a machine room 61 provided outside the heat insulating box 10. The foamed heat insulating material does not adhere to the region subjected to the mold release treatment. Therefore, a gap is formed between the contact surface between the periphery of the heat radiating pipe 33 and the foamed heat insulating material in the region 53 subjected to the mold release process, and the gap becomes a communication path. One end of the communication path communicates with the outside of the heat insulating box 10. On the other hand, the other end of the communication path communicates with the first gas flow path 22a. Thereby, external air (nitrogen and oxygen) can be flowed into the 1st gas flow path 22a from a communicating path. At the same time, the carbon dioxide gas in the groove 22 flows out of the heat insulating box 10 in the reverse flow. At this time, the gas passing through the communication passage does not pass through the foam heat insulating material. For this reason, in the permeation | transmission of gas, the influence by (gas diffusion coefficient) becomes large. The diffusion coefficient does not differ greatly between carbon dioxide, nitrogen, and oxygen. Thereby, the speed difference between the outflow of carbon dioxide gas from the groove portion to the outside of the heat insulating box body 10 and the inflow of nitrogen and oxygen from the outside of the heat insulating box body 10 to the groove portion via the communication path is eliminated. Therefore, the partial pressure of each gas in the groove is balanced with the partial pressure of each gas in the atmosphere with a small time difference. Thereby, the pressure difference between the total gas pressure in the grooves adjacent to each other in the juxtaposed direction and the outside of the heat insulating box is eliminated in a short time. In addition, you may provide the end of the area | region 53 to which the mold release process was performed in the space part 29a, without overlapping with the 2nd adhesive tape 42. FIG. In this case, the communication path, the first gas flow path 22a, and the second gas flow path 22b communicate with each other through the space 29a.

  According to this embodiment, the communication path can be easily formed by forming the communication path on the inner surface of the outer box 10 or the periphery of the heat radiating pipe 33. The release treatment 51 is performed by applying a release agent (silicon compound, fluorine compound, etc.) to which urethane does not adhere around the heat radiating pipe 33. In addition, the same effect can be acquired even if it apply | coats a mold release agent to the inner surface of the outer box 11 facing the extension part 33a. Further, the same effect can be obtained by applying a tape having a release agent applied on the surface thereof to the application area instead of applying the release agent.

[Fifth Embodiment]
FIG. 10 is a plan view showing a part of the outer box 11 according to the refrigerator according to the fifth embodiment. In addition, the same part as 1st Embodiment-4th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In the fifth embodiment, the third adhesive tape 43 is not attached to the first embodiment and the second embodiment.

  One end of the region 63 that has been subjected to the mold release process overlaps with one end of the second adhesive tape 42. One end of the second adhesive tape 42 intersects the first adhesive tape 41a. The other end of the region 63 subjected to the mold release process extends to the machine room 61 provided outside the heat insulating box 10. Since the foam heat insulating material does not adhere to the region 52a subjected to the mold release treatment, a communication path is formed in this region. Therefore, the first gas flow path 22 a covered by the lower part of the second adhesive tape 42 communicates with the outside of the heat insulating box 10 through the communication path formed in the region 63.

[Sixth Embodiment]
FIG. 11 is a plan view showing a part of the outer box 11 according to the refrigerator according to the sixth embodiment, and FIG. 12 is a cross-sectional view taken along the line D-D in FIG. 11. In addition, the same part as 1st Embodiment-5th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In the sixth embodiment, a fourth adhesive tape 44 is used instead of the third adhesive tape 43 in the first embodiment and the second embodiment.

  The heat radiating pipe 33 has extending portions 33a and 33b at one end. The extending portions 33a and 33b extend adjacent to the machine room 61 provided outside the heat insulating box 10. A plurality of adjacent heat radiating pipes 33 between the extending portions 33a and 33b and the first adhesive tape 41 are bundled by a fourth adhesive tape 44 wound around in the circumferential direction. At this time, a gap is formed between the adjacent heat radiating pipes 33 and the fourth adhesive tape 43 on the inner peripheral side of the fourth adhesive tape 43. Since the foamed heat insulating material 62 does not adhere to the inside of the fourth adhesive tape 44, the formed gap becomes the communication path 44a. One end of the fourth adhesive tape 44 intersects with the first adhesive tape 41a, and the other end of the fourth adhesive tape 44 extends to the machine chamber 61 provided outside the heat insulating box 10.

  According to the present embodiment, the communication path 44a can be easily formed by the fourth adhesive tape 44 that bundles adjacent heat radiating pipes 33 and winds them in the circumferential direction. Further, by bundling the adjacent heat radiating pipes 33 with the fourth adhesive tape 44, the entire heat radiating pipe 33 can be easily handled and positioned with respect to the inner surface of the outer box 11. Note that a plurality of adjacent radiating pipes 33 other than the extending portions 33 a and 33 b and the first adhesive tape 41 may be wound around the fifth adhesive tape 45 and bundled. Thereby, it becomes possible to handle the whole heat radiating pipe 33 arranged in parallel in a single plate shape.

  According to this invention, it can utilize for the refrigerator provided with the vacuum heat insulating material in the heat insulation box.

DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Outer box 11a Top plate 11b, 11e Side plate 11c Back plate 11d Bottom plate 12 Inner box 21 Vacuum heat insulating material 22 Groove part 22a 1st gas flow path 22b 2nd gas flow path 25 Core material 26 Cover material 26a , 26b End portions 27a, 27b Thermal welded portions 28a, 28b End surfaces 29a, 29b Space portions 33 Radiation pipes 33a Extension portions 41a, 41b First adhesive tape 42 Second adhesive tape 42a Through-hole 43 Third adhesive tape 43a Communication passage 44 Fourth adhesive tape 44a Communication path 45 Fifth adhesive tape 53, 63 Area subjected to release treatment (communication path)
61 Machine room 62 Foam insulation

Claims (9)

  A heat insulating box filled with a foam heat insulating material between the inner box and the metal outer box, and arranged in contact with the inner surface of the outer box in a state extending in one direction and arranged in a plurality of rows by meandering A heat radiating pipe having an extending portion extending to the outside of the heat insulating box, and a plurality of groove portions in which the core material is covered with a covering material and the inside is decompressed and the heat radiating pipe is fitted are arranged in parallel. A refrigerator comprising: a vacuum heat insulation panel attached to an inner surface of a box; and a communication passage that communicates the outside of the heat insulation box and the groove, and the grooves adjacent to each other in the juxtaposed direction are communicated.   Both ends of the vacuum heat insulating material in the direction in which the groove portion extends are fixed to the outer box by a first adhesive tape crossing each of the heat radiating pipes, and heat welding is performed in which the periphery of the first adhesive tape or the jacket material is thermally welded. The refrigerator according to claim 1, wherein a space part facing the end face of the vacuum heat insulating material and the outer box is formed by a part.   The heat radiating pipe is fixed to the outer box by a second adhesive tape disposed along the extending direction, and the inside of the groove is partitioned into a first gas channel and a second gas channel by the second adhesive tape. The refrigerator according to claim 2, wherein at least one end of the second adhesive tape does not intersect the first adhesive tape.   The heat radiating pipe is fixed to the outer box by a second adhesive tape disposed along the extending direction, and the inside of the groove is partitioned into a first gas channel and a second gas channel by the second adhesive tape. The refrigerator according to claim 2, wherein a through-hole is provided in the second adhesive tape.   The heat radiation pipe between the extension part and the first adhesive tape is fixed to the outer box by a third adhesive tape, and the communication path is formed inside the third adhesive tape. The refrigerator in any one of Claim 4.   The heat radiating pipe is fixed to the outer box by a first adhesive tape that crosses both ends in the extending direction in the juxtaposed direction, and the second adhesive tape that is arranged along the extending direction overlaps the first adhesive tape. The second adhesive tape is fixed to the outer box, the second adhesive tape extends to the outside of the heat insulating box to form the communication path, and the inside of the groove is divided into a first gas flow path and a second gas flow path by the second adhesive tape. 2. The refrigerator according to claim 1, wherein the first gas flow path and the inside of the first adhesive tape communicate with each other and a through hole is provided in the second adhesive tape.   The refrigerator according to any one of claims 1 to 4, wherein the communication path is formed by performing mold release processing on an inner surface of the outer box or around the heat radiating pipe.   A plurality of adjacent heat radiating pipes between the extending portion and the first adhesive tape are bundled together by a fourth adhesive tape wound in the circumferential direction, and the communication path is formed on the inner peripheral side of the fourth adhesive tape. The refrigerator in any one of Claims 2-4 characterized by these.   2. The refrigerator according to claim 1, wherein the vacuum heat insulating material includes a communication groove that communicates with the groove portion that intersects and is adjacent to the groove portion.

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