JP2004125394A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator applied with a vacuum heat insulation material, having excellent appearance of the outer surface stuck with the vacuum heat insulation material. <P>SOLUTION: In this refrigerator wherein a door 27 has a hard urethane foam 13 and the vacuum heat insulation material 38, a door inner plate 42 of the door 27 constituting the front face is formed with a depth-direction level-different face and protrusion parts 43 shaped on the in-chamber side, the vacuum heat insulation material 38 is stuck to a frontmost part of the level-different face such that the vacuum heat insulation material 38 covers the protrusion parts 43, the hard urethane foam 13 is injected and foamed, and the hard urethane foam 13 is also filled in the protrusion parts 43 from a space part between the vacuum heat insulation material 38 and the door inner plate 42 of the door 27. Thereby, because the vacuum heat insulation material 38 does not directly contact with the outer face of the door 27, deformation of the outer face of the door 27 caused by contraction after the foaming of the hard urethane foam 13 is not generated. <P>COPYRIGHT: (C)2004,JPO

Description

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

In recent years, in order to save energy and space in refrigerators, there is a method of using vacuum insulation materials having high heat insulation performance as a means of improving the heat insulation performance of refrigerators. It is urgently necessary to improve the heat insulating performance by maximizing the use of a vacuum heat insulating material having a heat insulating performance several to ten times that of the foam within an appropriate range. On the other hand, when vacuum insulation is applied to the heat insulation box of a refrigerator with multiple layers of hard urethane foam, there is a problem that the appearance of the heat insulation box is deformed due to the difference in the shrinkage ratio between the hard urethane foam and the vacuum insulation. Had. As means for solving the above-mentioned problems, there is known one described in Patent Document 1.

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

FIG. 24 is a cross-sectional view of a door arranged at a front opening of a conventional refrigerator, and FIG. 25 is an enlarged view of a portion A in FIG.

In FIGS. 24 and 25, 1 is a metal outer plate, 2 is a synthetic resin door frame, 3 is a synthetic resin inner box, 4 is a foam heat insulating material, and 5 is a vacuum heat insulating material. Reference numeral 6 denotes a release paper inserted between the vacuum heat insulating material 5 and the outer plate 1, and is formed larger than the vacuum heat insulating material 5. Therefore, since the vacuum heat insulating material 5 is located on the inner surface of the outer plate 1 via the release paper 6, the foam heat insulating material 4 contracts after the foam heat insulating material 4 is foamed. By forming a gap x between the outer plate 1 and the release paper 6, the deformation of the outer plate 1 is prevented.
Japanese Utility Model Publication No. 61-141690

However, in the refrigerator described in the above conventional example, although the appearance deformation of the outer plate can be prevented, a gap is generated between the outer plate and the foamed heat insulating material, so that the user may touch the outer plate. However, there is a problem that the tactile sensation is deteriorated due to the sticking of the outer plate.

In view of the above problems, the present invention provides a refrigerator that has a good external appearance and does not impair the tactile sensation even when a vacuum heat insulating material is used.

In order to solve the above-mentioned problems, a refrigerator of the present invention is provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, and is formed inside a refrigerator in an inner box of a door constituting a front surface. Forming a protrusion and a step surface in the depth direction, pasting the vacuum heat insulating material so as to cover the protrusion on the forefront part of the step surface, injecting and foaming the rigid urethane foam, and forming an inner box of the door. The rigid urethane foam is also filled from the space of the vacuum heat insulating material to the protrusions.

According to the present invention, since the vacuum heat insulating material does not directly contact the outer surface of the door, the outer surface of the door is not deformed due to shrinkage after foaming of the rigid urethane foam.

真空 Furthermore, the vacuum heat insulating material can be maximized by being attached to the frontmost portion, and the heat insulating performance can be improved. Further, the rigid urethane foam can be formed also on the protrusion formed on the inner side of the inner box, and the strength of the protrusion can be increased.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between the outer case and the inner case, the vacuum heat insulating material arranged on the drawer type door constituting the front surface is a space between the inner case and the outer plate of the door. Part, a spacer is partially used between the vacuum heat insulating material and the door inner plate to be disposed in the space, and the spacer corresponds to a rail fixing part for fixing the rail of the drawer type door. It is arranged.

According to the present invention, since the vacuum heat insulating material does not directly contact the outer surface of the door, the outer surface of the door does not deform due to shrinkage after foaming of the rigid urethane foam, and the rail fixing portion formed on the inner side of the inner box of the inner box. Also, the rigid urethane foam can be reliably formed, and the strength of the rail fixing portion can be increased.

ス ペ ー サ The spacer is a member softer than the vacuum heat insulating material.

According to the present invention, by using a member softer than the vacuum heat insulating material as the spacer, the reliability of the vacuum heat insulating material can be improved without damaging the outer cover material of the vacuum heat insulating material.

The spacer has a substantially rectangular parallelepiped shape, and the flow direction during foaming of the rigid urethane foam matches the longitudinal direction of the spacer.

According to the present invention, it is possible to reduce the inhibition of the flow of the rigid urethane foam during foaming by the spacer, improve the urethane filling property, and reliably increase the strength of the rail fixing portion.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box, by absorbing variations in flatness of the surface of the vacuum heat insulating material between the vacuum heat insulating material and the outer box. An interposed member made of a soft member that is softer than a vacuum heat insulating material that prevents deformation of the outer surface of the outer case, and an interposed member made of a hard member that is harder than the vacuum heat insulating material that prevents transmission of the outer box deformation factor are provided. The interposed members are arranged in the order of a hard member and a soft member from the outer box side.

According to the present invention, the unevenness of the surface of the vacuum heat insulating material, the soft member absorbs the deformation factor of the outer case such as warpage, and the hard member prevents transmission of the deformation factor of the outer case, thereby reliably deforming the outer surface of the outer case. Can be prevented.

Further, by disposing the vacuum heat insulating material on the soft member surface, it is possible to prevent the outer insulating material of the vacuum heat insulating material from being damaged by the intervening member and to reliably prevent the outer surface of the outer box from being deformed.

Further, in a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, a heat radiating pipe is disposed between the vacuum heat insulating material and the outer box, and the vacuum facing the heat radiating pipe is provided. By providing a groove in the portion of the heat insulating material, fixing the heat radiation pipe to the outer box with aluminum tape, extending one end of the aluminum tape out of the refrigerator and positioning the other end inside the vacuum heat insulating material. A first gap between the aluminum tape and the outer box and a second gap between the aluminum tape and the groove of the vacuum heat insulating material communicate with the outside.

According to the present invention, since the gap formed by the vacuum heat insulating material and the heat radiating pipe communicates with the outside, a gas such as a foaming gas does not stay in the gap, and changes in ambient temperature are caused. The expansion and contraction of the gap do not occur, and the outer surface of the outer box of the heat dissipating pipe arrangement portion can be prevented from being deformed.

In addition, when the rigid urethane foam is foamed, urethane slightly flows into the mullion pipe arrangement portion, but at a distance such that the urethane does not reach, the other end of the aluminum tape positioned outside the refrigerator is positioned inside from the vacuum heat insulating material end. As a result, the space between the vacuum insulating material and the aluminum tape and the space between the aluminum tape and the outer box communicate with each other, and the gas in the gap between the vacuum insulating material and the outer box is smoothly discharged to the outside of the refrigerator. The gap does not expand or contract due to a change in the ambient temperature, so that the outer surface of the outer casing of the heat dissipating pipe disposing portion can be prevented from being deformed.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, the vacuum heat insulating material is disposed in an outer box, and the outer heat insulating member is provided in correspondence with a portion where the vacuum heat insulating material is disposed. The outer surface of the box is provided with pores.

According to the present invention, since the gas in the gap between the vacuum heat insulating material and the outer box is smoothly discharged through the pores to the outside of the chamber, expansion and contraction of the gap due to a change in ambient temperature do not occur, and the vacuum Deformation of the outer surface of the outer box of the heat insulating material placement portion can be prevented.

According to the refrigerator of the present invention, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, a projection formed on the inner box of the inner box of the door constituting the front surface and a depth direction The vacuum insulation material is attached so as to cover the protruding portion on the frontmost portion of the stepped surface, and the rigid urethane foam is injected and foamed, and the inner box of the door and the vacuum insulation material are formed. The rigid urethane foam is also filled from the space to the protrusions, and the vacuum heat insulating material does not directly contact the outer surface of the door, so that the outer surface of the door does not deform due to shrinkage after foaming of the rigid urethane foam.

真空 Furthermore, the vacuum heat insulating material can be maximized by being attached to the frontmost portion, and the heat insulating performance can be improved. Further, the rigid urethane foam can be formed also on the protrusion formed on the inner side of the inner box, and the strength of the protrusion can be increased.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between the outer case and the inner case, the vacuum heat insulating material arranged on the drawer type door constituting the front surface is a space between the inner case and the outer plate of the door. Part, a spacer is partially used between the vacuum heat insulating material and the door inner plate to be disposed in the space, and the spacer corresponds to a rail fixing part for fixing the rail of the drawer type door. Since the vacuum heat insulating material does not directly contact the outer surface of the door, the outer surface of the door does not deform due to shrinkage after foaming of hard urethane foam, and the rail fixing part formed inside the inner box of the inner box Also, the rigid urethane foam can be reliably formed, and the strength of the rail fixing portion can be increased.

The spacer is made of a material softer than the vacuum heat insulating material, so that the reliability of the vacuum heat insulating material can be improved without damaging the outer cover material of the vacuum heat insulating material.

Further, the spacer has a substantially rectangular parallelepiped shape, and a flow direction at the time of foaming of the rigid urethane foam and a longitudinal direction of the spacer are matched, so that the obstruction of the flow at the time of foaming of the rigid urethane foam by the spacer can be reduced. As a result, the urethane filling property is improved, and the strength of the rail fixing portion can be reliably increased.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box, by absorbing variations in flatness of the surface of the vacuum heat insulating material between the vacuum heat insulating material and the outer box. An interposed member made of a soft member that is softer than a vacuum heat insulating material that prevents deformation of the outer surface of the outer case, and an interposed member made of a hard member that is harder than the vacuum heat insulating material that prevents transmission of the outer box deformation factor are provided. The intervening member is arranged in the order of a hard member and a soft member from the outer case side, and the soft member absorbs the outer case deformation factors such as unevenness and warpage of the surface of the vacuum heat insulating material, and the outer case deformation factor. The hard member prevents the transmission of the outer case, so that the deformation of the outer surface of the outer box can be surely prevented.

Further, by disposing the vacuum heat insulating material on the soft member surface, it is possible to prevent the outer insulating material of the vacuum heat insulating material from being damaged by the intervening member and to reliably prevent the outer surface of the outer box from being deformed.

Further, in a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, a heat radiating pipe is disposed between the vacuum heat insulating material and the outer box, and the vacuum facing the heat radiating pipe is provided. By providing a groove in the portion of the heat insulating material, fixing the heat radiation pipe to the outer box with aluminum tape, extending one end of the aluminum tape out of the refrigerator and positioning the other end inside the vacuum heat insulating material. A first gap between the aluminum tape and the outer box and a second gap between the aluminum tape and the groove of the vacuum heat insulating material are communicated with the outside, and a rigid urethane foam is used. At the time of foaming, urethane slightly flows into the mullion pipe installation part, but by positioning the other end of the aluminum tape outside the refrigerator inside the end of the vacuum insulation material within a distance that urethane does not reach. The space between the vacuum insulation material and the aluminum tape and the space between the aluminum tape and the outer case communicate with each other, and the gas in the gap between the vacuum insulation material and the outer case is smoothly discharged to the outside. The expansion and contraction of the gap due to the change do not occur, and the outer surface of the outer case of the heat dissipating pipe disposing portion can be prevented from being deformed.

Further, in a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, the vacuum heat insulating material is disposed in an outer box, and the outer heat insulating member is provided in correspondence with a portion where the vacuum heat insulating material is disposed. Since pores are provided on the outer surface of the box, the gas in the gap between the vacuum heat insulating material and the outer box is smoothly discharged through the pores to the outside of the box, so that the expansion of the gap due to a change in ambient temperature. The shrinkage does not occur, and the outer surface of the outer box of the vacuum heat insulating material disposition portion can be prevented from being deformed.

The invention according to claim 1 of the present invention is directed to a refrigerator having a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the projection formed on the inner box of the inner box of the door constituting the front surface is provided. Forming a part and a step surface in the depth direction, pasting the vacuum heat insulating material so as to cover the protrusion on the frontmost part of the step surface, injecting and foaming the rigid urethane foam, and forming the inner box of the door and the The rigid urethane foam is also filled from the space of the vacuum heat insulating material to the protrusions.

According to the present invention, since the vacuum heat insulating material does not directly contact the outer surface of the door, the outer surface of the door is not deformed due to shrinkage after foaming of the rigid urethane foam.

真空 Furthermore, the vacuum heat insulating material can be maximized by being attached to the frontmost portion, and the heat insulating performance can be improved. Further, the rigid urethane foam can be formed also on the protrusion formed on the inner side of the inner box, and the strength of the protrusion can be increased.

The invention according to claim 2 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the vacuum heat insulating material disposed on the drawer-type door constituting the front surface is the above-mentioned. The door is disposed in the space between the inner box and the outer plate, and a spacer is partially used between the vacuum heat insulating material and the door inner plate to be disposed in the space. Are arranged corresponding to the rail fixing portions for fixing the.

According to the present invention, since the vacuum heat insulating material does not directly contact the outer surface of the door, the outer surface of the door does not deform due to shrinkage after foaming of the rigid urethane foam, and the rail fixing portion formed on the inner side of the inner box of the inner box. Also, the rigid urethane foam can be reliably formed, and the strength of the rail fixing portion can be increased.

発 明 In the invention described in claim 3 of the present invention, in the invention described in claim 2, the spacer is a member softer than a vacuum heat insulating material.

According to the present invention, by using a member softer than the vacuum heat insulating material as the spacer, the reliability of the vacuum heat insulating material can be improved without damaging the outer cover material of the vacuum heat insulating material.

The invention according to claim 4 of the present invention is the invention according to claim 2 or 3, wherein the spacer has a substantially rectangular parallelepiped shape, and a flow direction during foaming of the rigid urethane foam and a longitudinal direction of the spacer are matched. It is.

According to the present invention, it is possible to reduce the inhibition of the flow of the rigid urethane foam during foaming by the spacer, improve the urethane filling property, and reliably increase the strength of the rail fixing portion.

The invention according to claim 5 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulator between an outer box and an inner box, wherein the vacuum heat insulator is provided between the vacuum heat insulator and the outer box. An interposed member made of a soft member that is softer than a vacuum heat insulating material that absorbs variations in surface flatness and prevents deformation of the outer surface of the outer case, and a harder hard material than the vacuum heat insulating material that prevents transmission of the outer case deformation factor And an intervening member comprising a hard member and a soft member arranged in this order from the outer case side.

According to the present invention, the unevenness of the surface of the vacuum heat insulating material, the soft member absorbs the deformation factor of the outer case such as warpage, and the hard member prevents transmission of the deformation factor of the outer case, thereby reliably deforming the outer surface of the outer case. Can be prevented.

Further, by disposing the vacuum heat insulating material on the soft member surface, it is possible to prevent the outer insulating material of the vacuum heat insulating material from being damaged by the intervening member and to reliably prevent the outer surface of the outer box from being deformed.

The invention according to claim 6 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein a heat radiating pipe is disposed between the vacuum heat insulating material and the outer box. At the same time, a groove is provided in a portion of the vacuum heat insulating material facing the heat radiating pipe, the heat radiating pipe is fixed to the outer box with aluminum tape, one end of the aluminum tape extends out of the refrigerator, and the other end extends to the outside. By being located inside the vacuum heat insulating material, the first gap between the aluminum tape and the outer box and the second gap between the aluminum tape and the groove of the vacuum heat insulating material are externally connected. Is to communicate with

According to the present invention, since the gap formed by the vacuum heat insulating material and the heat radiating pipe communicates with the outside, a gas such as a foaming gas does not stay in the gap, and changes in ambient temperature are caused. The expansion and contraction of the gap do not occur, and the outer surface of the outer box of the heat dissipating pipe arrangement portion can be prevented from being deformed.

According to the present invention, at the time of foaming of rigid urethane, urethane flows into the mullion pipe arrangement portion slightly, but at a distance such that urethane does not reach, the other end of the aluminum tape positioned outside the refrigerator is located at the end of the vacuum heat insulating material. By positioning it inside, the space between the vacuum heat insulating material and the aluminum tape and the space between the aluminum tape and the outer case communicate, and the gas in the gap between the vacuum heat insulating material and the outer case is smoothly discharged to the outside of the refrigerator. Therefore, expansion and contraction of the gap due to a change in ambient temperature do not occur, and deformation of the outer surface of the outer box of the heat dissipating pipe arrangement portion can be prevented.

The invention according to claim 7 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulator between an outer box and an inner box, wherein the vacuum heat insulator is disposed in the outer box, and the vacuum heat insulator is provided. Corresponding to the disposition portion, a pore is provided on the outer surface of the outer box.

According to the present invention, since the gas in the gap between the vacuum heat insulating material and the outer box is smoothly discharged through the pores to the outside of the chamber, expansion and contraction of the gap due to a change in ambient temperature do not occur, and the vacuum Deformation of the outer surface of the outer box of the heat insulating material placement portion can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure as a conventional one, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. The present invention is not limited by the embodiment.

(Embodiment 1)
1 is a front view of a refrigerator according to a first embodiment of the present invention, FIG. 2 is a side sectional view of the refrigerator of the embodiment, FIG. 3 is a front sectional view of the refrigerator of the embodiment, and FIG. FIG. 5 is an exploded view of the refrigerator compartment door of the refrigerator before foaming, FIG. 5 is a sectional view of the refrigerator after foaming in FIG. 4, and FIG. 6 is a sectional view of the refrigerator compartment door of the refrigerator of the embodiment.

In the figure, reference numeral 10 denotes a refrigerator body, and a rigid urethane foam 13 is filled in a space formed by an inner box 11 made of a synthetic resin such as ABS and an outer box 12 made of a metal such as an iron plate. Numeral 14 denotes a heat insulating partition wall, in which a refrigerator compartment 15 and a vegetable compartment 16 are formed above the heat insulating partition wall 14, and a switching room 17, an ice making room 18 and a freezing room 19 are formed below. Reference numeral 20 denotes a machine room arranged below the rear part of the refrigerator main body 10 and inside which a compressor 21 is arranged. 22 is a refrigeration cooler, 23 is a refrigeration blower, 24 is a refrigeration cooler, 25 is a refrigeration blower, and 26 is a condenser provided on the bottom of the refrigerator main body 10.

At the front opening of the refrigerator main body 10, a hinge-type refrigerator compartment door 27 that pivots around one end, a drawer-type vegetable compartment door 28, a switching compartment door 29, an ice making compartment door 30, a freezer compartment, respectively. A door 31 is provided. Reference numerals 32, 33, 34, 35, 36, 37, 38, 39, 40, and 41 denote vacuum heat insulators, which together with the rigid urethane foam 13 constitute the refrigerator body 10.

Here, the vacuum heat insulating materials 32, 33, 34, and 36 are attached in contact with the top surface, the back surface, the side surface, and the inside of the machine room constituting surface of the outer box 11, respectively. The vacuum heat insulating material 35 is attached in contact with the bottom surface of the inner box 12. Further, the vacuum heat insulating material 37 is provided in the heat insulating partition wall 14.

Further, inside the hinge-type refrigerator compartment door 27 disposed at the front opening of the refrigerator body 10, a vacuum heat insulating material 38 is provided so as to be in contact with the inner box, and the drawer-type vegetable compartment door 28 and the switching compartment door 29 are provided. Inside the freezer compartment door 31, vacuum heat insulators 39, 40, and 41 are respectively disposed so as to be located between the outer iron plate and the inner box of each door.

The thickness of the heat insulating wall of the heat insulating box formed of the rigid urethane foam 13 and the vacuum heat insulating materials 33, 34, 35, and 36 surrounding the freezing room 19 and the switching room 17 in the freezing area is the wall of the opening except the door. A heat insulating wall of a heat insulating box formed of hard urethane foam 13 and vacuum heat insulating materials 32, 33, 34 surrounding a refrigerator room 15 and a vegetable room 16 in a refrigerator region in a distribution of 25 to 50 mm including a thin portion. The thickness has a distribution of 25 to 40 mm excluding the door, including the thin portion of the wall of the opening.

As described above, due to the configuration in which the vacuum heat insulating material is disposed on both sides, the top surface, the back surface, the bottom surface, and the front surface of the refrigerator body 10, the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is 50%. Over 80%.

The reason why the covering rate of the vacuum heat insulating material is set to be more than 50% and equal to or less than 80% is that when a large amount of the vacuum heat insulating material is provided and the covering rate is to be increased to the maximum, components not shown in the refrigerator main body 10 or special In a portion having a structure (such as an uneven shape, a pipe, and a drain pipe installation portion), a special form of vacuum heat insulating material is required, or the workability of attaching the vacuum heat insulating material becomes extremely poor.

For this reason, even if it is attempted to dispose the vacuum heat insulating material over approximately 80% of the surface area of the outer box 11, the above-mentioned use efficiency will be poor and the use value will be saturated. The effect of improving the heat insulation performance is significantly reduced.

Therefore, as in the present embodiment, the effect of using a large amount of vacuum heat insulating material is not saturated by limiting the covering ratio of the vacuum heat insulating material to the surface area of the outer box 11 to 80%, and the utility value is reduced. In a high state, the heat absorption load can be effectively suppressed, and the energy saving effect can be enhanced.

The 80% coverage is achieved by providing a large-sized vacuum heat insulating material that can cover almost all of the sides, top, back, bottom, and front surfaces of the heat insulation box. Can also be realized well.

For this reason, the use of this heat-insulating box does not cause the investment effect to be significantly reduced due to the use of a non-standard form of vacuum heat-insulating material and the work of disposing the heat-insulating box at a portion where the work efficiency is low. The value as the life cycle cost can be increased without breaking the balance between the increase in the initial cost and the reduction in the running cost due to energy saving.

Further, if the surface area of the outer box 12 exceeds about 50% by arranging from the place where the passing heat gradient is large inside and outside the heat insulating box, the heat absorption load of the heat insulating box can be effectively suppressed. Energy saving effect.

Further, the center line average roughness (Ra) of the outer surface of the outer case 11 on which the vacuum heat insulating materials 32, 33, 34 are disposed is set to 0.1 μm or more, which is more than the conventional 0.1 μm or less. You have set.

4 and 5, reference numeral 42 denotes a door inner plate, which has a projection 43, a vacuum heat insulating material 38 is attached so as to be in contact with the surface of the forefront part 44, and after the rigid urethane foam 13 is injected, the door is closed. The inner plate 42 is covered and foamed to form the refrigerator compartment door 27.

FIG. 6 is a sectional view of the drawer type freezer compartment door 31. Reference numeral 45 denotes a door inner plate having a fixing portion 47 for fixing a rail 46 for supporting a case (not shown) for storing frozen food, and is fixed together with the reinforcing plate 48 in the urethane by the fixing portion 47. Reference numeral 49 denotes a spacer, which is fixed to a part of the reinforcing plate 48 with an adhesive or the like so that the vacuum heat insulating material 41 is disposed in a space between the door inner plate 45 and the door outer plate 50.

The spacer 49 is made of a material softer than the vacuum heat insulating material 41, for example, styrene foam or polyethylene foam.

The spacer 49 has a substantially rectangular parallelepiped shape, and is arranged so that the flow direction of the foamed rigid urethane foam 13 and the longitudinal direction of the spacer 49 match.

In the above-described configuration, the refrigerator compartment 15 and the vegetable compartment 16 are almost 0 by the cooling device including the compressor 21, the refrigerator cooler 22, the refrigerator blower 23, the freezing cooler 24, the freezing blower 25, and the condenser 26. The switching room 17, the ice making room 18, and the freezing room 19 are cooled to a temperature of approximately -15 to -25C.

Then, the vacuum heat insulating material is disposed from the place where the heat gradient passing through the inside and outside of the box is large, and when the covering rate exceeds about 50% of the outer box surface area, the heat absorption load of the refrigerator can be effectively suppressed. It is possible to enhance the energy saving effect, and to reduce the coverage to 80% or less, which requires the use of non-standard form of vacuum heat insulating material and the work of arranging it in the part with low work efficiency, and the vacuum heat insulation. It is possible to avoid a rapid increase in the cost ratio with respect to the reduction in the amount of heat absorbed by the material, and to effectively suppress the heat absorption load in a state where the use value of the vacuum heat insulating material is high, thereby improving the energy saving effect.

In addition, since the vacuum heat insulating materials 32, 33, and 34 are in contact with and attached to the outer case 11, the outer surfaces of the outer case 11 may be removed due to unevenness of the surfaces of the vacuum heat insulators 32, 33, and 34, and variations in flatness such as warpage. Although the surface may be deformed, the center line average roughness (Ra) of the outer surface of the outer box 11 is set to 0.1 μm or more, and is set to be coarser than the conventional 0.1 μm or less. In this case, the reflectance of light on the outer surface of the outer case is reduced, and deformation of the outer surface of the outer case due to the attachment of the vacuum heat insulating material can be visually reduced. Therefore, it is possible to cope with the appearance deformation of the refrigerator 10 to which the vacuum heat insulating material is applied without using a complicated structure or special parts and materials. The upper limit of the center line average roughness (Ra) of the outer surface of the outer box 11 is desirably 1 μm or less which does not impair the quality of the appearance.

Further, a vacuum heat insulating material 38 is attached so as to be in contact with the surface of the frontmost portion 44 of the door inner plate 42, and after the hard urethane foam 13 is injected, the door inner plate 42 is covered and foamed to form the refrigerator compartment door 27. Therefore, the vacuum heat insulating material 38 does not directly contact the outer surface of the refrigerator compartment door 27, and the outer surface of the refrigerator compartment door 27 does not deform due to shrinkage after the foaming of the hard urethane foam 13.

Further, since the vacuum heat insulating material 38 is attached so as to be in contact with the surface of the frontmost portion 44 of the door inner plate 42, the vacuum heat insulating material 38 can be arranged as large as possible, and the heat insulating performance can be improved. . Further, the protrusion 43 formed on the inner side of the door inner plate 42 can be filled with the hard urethane foam from the vacuum heat insulating material 38 and the space of the door inner plate 42, and the strength of the protrusion can be increased.

Further, since the vacuum heat insulating material 41 disposed on the drawer type freezer compartment door 31 is partially disposed in the space between the door inner plate 45 and the door outer plate 50 via the spacer 49, the rigid urethane foam 13 foams. The outer surface of the door outer panel 50 does not deform due to the subsequent contraction. Further, the rigid urethane foam 13 can be reliably formed also in the vicinity of the fixing portion 47 of the rail 46 formed on the door inner plate 45 or the reinforcing plate 48, and the strength of the rail fixing portion 47 can be increased.

(4) Since the spacer 49 is a member softer than the vacuum heat insulating material 41, the reliability of the vacuum heat insulating material 41 can be improved without damaging the outer cover material of the vacuum heat insulating material 41.

Further, since the spacer 49 has a substantially rectangular parallelepiped shape and is arranged so that the flow direction of the rigid urethane foam 13 at the time of foaming and the longitudinal direction of the spacer 49 are aligned, the flow of the rigid urethane foam 13 at the time of foaming by the spacer 49 is determined. Obstruction can be reduced, urethane filling properties can be improved, and the strength of the rail fixing portion can be reliably increased.

Although the freezer compartment door 31 has been described as the drawer door of the refrigerator of the present embodiment, the same effect can of course be obtained for the vegetable compartment door 28 and the switching compartment door 29 that constitute the drawer door. .

Although a single vacuum heat insulating material 38 is used for the refrigerator compartment door 27 of the refrigerator of the present embodiment, a plurality of vacuum heat insulating materials 38a and 38b are provided for one door as shown in FIGS. The door inner plate 42 may be arranged with a gap near the protrusion 43. In this case, the rigid urethane foam 13 can be reliably filled in the protrusion 43, and the strength of the protrusion 43 of the refrigerator compartment door 27a can be increased.

(Embodiment 2)
FIG. 9 is a front view of a refrigerator according to Embodiment 2 of the present invention. The description of the same configuration as that of the first embodiment will be omitted, and only different points will be described.

In the figure, the glossiness of the outer surface of the outer box 12 where the vacuum heat insulating materials 32, 33, and 34 are disposed on the outer box 12 is reduced from about 90 in the related art to 80 or less.

Here, the gloss refers to a gloss of 100% at a 60 ° incident angle on the glass surface having a refractive index of 1.567, or a gloss of 5% at an incident angle of 20 ° on a glass surface having a refractive index of 1.567. The degree is set to 100, and is specified in the JIS standard (JIS, Z8741).

According to the above configuration, the vacuum heat insulating materials 32, 33, and 34 are in contact with and adhered to the outer case 12, so that irregularities on the surfaces of the vacuum heat insulators 32, 33, and 34, and variations in flatness such as warpage cause variations in the outer case. Although the outer surface of the outer case 12 may be deformed, the gloss of the outer surface of the outer case 12 is reduced from about 90 to 80 or less, so that the reflectance of light on the outer surface of the outer case with the same surface roughness decreases. In addition, deformation of the outer surface of the outer box due to the attachment of the vacuum heat insulating material can be visually reduced.

Therefore, it is possible to cope with the deformation of the refrigerator 10 to which the vacuum heat insulating material is applied without using a complicated structure or special parts and materials. In addition, the lower limit of the glossiness of the outer surface of the outer box 12 is desirably about 50 which does not impair the appearance quality.

(Embodiment 3)
FIG. 10 is a sectional view of a main part of a side wall of a refrigerator according to a third embodiment of the present invention, and FIG. 11 is a perspective view of a main part of the refrigerator of the same embodiment. The description of the same configuration as that of the first embodiment will be omitted, and only different points will be described.

In the figure, 51 is an outer box, 52 is an inner box, and between the outer box 51 and the inner box 52 is a soft member 53 as an intervening member for preventing deformation of the outer surface of the outer box from the outer box 51 side, and vacuum insulation. A material 54 and a rigid urethane foam 55 are provided. The soft member 53 as an intervening member is larger than the vacuum heat insulating material 54 and is a member softer than the vacuum heat insulating material 54, for example, a resin foam. Preferably, a resin foam made of an independent foam is desirable.

厚 み The thickness t1 of the soft member 53 as an intervening member is not less than the flatness of the vacuum heat insulating material 54 and not more than the thickness of the vacuum heat insulating material, specifically, not less than 3 mm and not more than 15 mm.

With the above-described configuration, the soft member 53 as an intervening member provided between the vacuum heat insulating material 54 and the outer case 51 for preventing the outer surface of the outer case 51 from deforming allows the flatness of the surface of the vacuum heat insulating material 54 to be uneven or warped. And the deformation of the outer surface of the outer box can be prevented.

The soft member 53 as the intervening member is made larger than the vacuum heat insulating material 54, so that it is possible to absorb a variation in attachment when the vacuum heat insulating material 54 is attached to the outer case 51, thereby improving work efficiency.

Further, since the soft member 53 as the intervening member is a member softer than the vacuum heat insulating material 54, the reliability of the vacuum heat insulating material 54 can be improved without damaging the outer cover material of the vacuum heat insulating material 54 during manufacturing. .

Further, since the soft member 53 as the intervening member is a member made of a resin foam, the foaming pressure at the time of foaming the hard urethane foam 13 is absorbed by the compression of the resin foam, and the resin foam is formed at the time of contraction of the hard urethane foam after foaming. It can be absorbed by the expansion of the body, and the deformation of the outer surface of the outer box can be reliably prevented.

Further, since the soft member 53 as an intervening member is a member made of an independent foam, it is possible to prevent gas such as foaming gas and air from entering the inside of the soft member 53, and to prevent deformation of the outer surface of the outer case due to temperature change. it can.

Further, the thickness t1 of the soft member 53 as the intervening member is not less than the flatness of the vacuum heat insulating material 54 and not more than the thickness of the vacuum heat insulating material, specifically, not less than 3 mm and not more than 15 mm. Since the soft member 53 can reliably absorb the heat and the thickness of the soft member 53 is not made more than necessary, the deterioration of the heat insulation performance can be suppressed.

Even if the soft member 53 as an intervening member is pasted to the outer box 51 and then the vacuum heat insulating material 54 is pasted, the soft member 53 as an intervening member is preliminarily pasted to the You may paste it.

(Embodiment 4)
FIG. 12 is a cross-sectional view of a main part of a side wall of a refrigerator according to Embodiment 4 of the present invention. The description of the same configuration as in the first to third embodiments is omitted, and only different points will be described.

In the figure, reference numeral 56 denotes a hard member as an intervening member provided between the vacuum heat insulating material 54 and the outer box 51, and a member harder than the vacuum heat insulating material 54, for example, an ABS sheet. Degree or less, specifically, 3 mm or less.

に よ り With the above configuration, it is possible to prevent factors such as unevenness and warpage on the surface of the vacuum heat insulating material 54 from being transmitted to the outer surface of the outer case, thereby preventing deformation of the outer surface of the outer case. Further, since the thickness of the hard member 56 as an intervening member can be made relatively thin, the influence on the heat insulation performance can be suppressed.

(Embodiment 5)
FIG. 13 is a cross-sectional view of a main part of a side wall of a refrigerator according to Embodiment 5 of the present invention. The description of the same configuration as those of the first to fourth embodiments will be omitted, and only different points will be described.

In the figure, a soft member 53 and a hard member 56 are provided between a vacuum heat insulating material 54 and an outer box 51, and the hard member 56, the soft member 53, and the vacuum heat insulating material are arranged in this order from the outer box 51 side. 54.

According to the above configuration, the soft member 53 absorbs the deformation factors of the outer box such as unevenness and warpage of the surface of the vacuum heat insulating material 54, and the hard member 56 prevents the transmission of the deformation factors of the outer box. Can be prevented.

Further, since the intervening member is arranged in the order of the hard member 56, the soft member 53, and the vacuum heat insulating material 54 from the outer box 51 side, the soft member 53 as the intervening member can prevent the damage of the outer cover material of the vacuum heat insulating material. .

(Embodiment 6)
FIG. 14 is a sectional view of a vacuum heat insulating material used for a refrigerator according to the sixth embodiment of the present invention, and FIGS. 15 and 16 are cross sectional views of another vacuum heat insulating material used for the refrigerator of the same embodiment. The description of the same configuration as those of the first to fifth embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 57 denotes a core material sealed inside a vacuum heat insulating material, the periphery of which is sealed with a first outer skin material 58, and the inside is evacuated and maintained in a vacuum state. The outer periphery of the first outer cover member 58 is covered with a second outer cover member 59 to form a double structure. The gas is sealed in a space 60 between the first outer skin material 58 and the second outer skin material 59. Air or an inert gas is used as the gas.

With the above configuration, the outer periphery of the first outer shell material 58 in which the outer box deformation such as unevenness and warpage of the surface of the core material 57 sealed in the vacuum heat insulating material occurs is covered with the second outer shell material 59 to form a double structure. Therefore, the outer casing material 59 absorbs the deformation factor of the outer case, thereby preventing the outer surface of the outer case from being deformed.

In addition, since gas is sealed between the outer shells of the double structure, irregularities on the surface of the vacuum heat insulating material, deformation factors of the outer box such as warpage, etc., are filled in the space of the gas sealed between the outer shells of the double structure. At 60, deformation of the outer surface of the outer box can be prevented.

Note that, as shown in FIG. 15, the thickness t3 of the outer shell material 59b having a double structure may be made larger than the thickness t2 of the other outer shell material 59a, and the outer shell material 59b may be attached to the outer box 12. In this case, since the thickness t3 of the outer cover material 59b is increased, the thickness t3 can absorb the outer box deformation factors such as unevenness and warpage of the surface of the vacuum heat insulating material, thereby preventing the outer surface of the outer box from being deformed.

As shown in FIG. 16, the outer periphery of the first outer cover member 58 may be covered with a second outer cover member 59 to form a double structure, and the soft member 61 may be sealed between the outer cover members having the double structure. In this case, the soft member 61 can absorb the deformation factors of the outer box such as unevenness and warpage on the surface of the vacuum heat insulating material and prevent the outer surface of the outer box from being deformed. At the same time, the soft member 61 has a function of protecting the vacuum heat insulating material, and the reliability of the vacuum heat insulating material is improved.

(Embodiment 7)
FIG. 17 is a plan view showing a state before bending the outer box of the refrigerator according to the seventh embodiment of the present invention, FIG. 18 is a perspective view showing a state after bending the outer box of the refrigerator of the same embodiment, and FIG. FIG. 20 is a partial enlarged cross-sectional view of the vacuum heat insulating material used in the refrigerator according to the embodiment, FIG. 20 is a partially enlarged cross-sectional view in which the vacuum heat insulating material used in the refrigerator is used, and FIG. It is a principal part disassembled perspective view of the other end of the aluminum tape after foaming. The description of the same configuration as in the first to sixth embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 62 denotes an outer box made of a steel plate, which is a flat plate before being bent, in which a radiating pipe 63 constituting a refrigeration cycle is fixed with an aluminum tape 64 as a fixing member, and vacuum heat insulating materials 65, 66, 67 are provided on the upper surface thereof. Is fixed with an adhesive member such as hot melt. Reference numeral 68 denotes a part constituting a machine room for accommodating a compressor or the like of a refrigeration cycle. The outer box 62 is bent at a bending portion 69, and a back plate 70, a bottom plate 71, and an inner box (not shown) are assembled. The space formed by the box 62 and the inner box is filled with rigid urethane foam and foamed. Therefore, the hard urethane foam is not filled in the machine room component 68 and communicates with the outside. The aluminum tape 64 for fixing the heat radiating pipe 63 has one end 64a extending to the machine room component 68. The other end 64b of the aluminum tape 64 is located inside the vacuum heat insulating material 65.

{Circle around (5)} After the vacuum heat insulating material 65 is completed, a groove 74 is formed by the press section 73 of the press machine 72. Then, the vacuum heat insulating material 65 is arranged and fixed to the outer box 62 such that the heat radiation pipe 63 enters the groove 74.

Further, when disposing the heat radiating pipe 63 between the outer box 62 and the vacuum heat insulating material 65, the first gap portion 76 is formed between the outer box 62 and the aluminum tape 64 so as to form the aluminum tape 64 and the vacuum heat insulating material 65. A second gap portion 77 is formed between the groove 74 and the groove 74.

With the above configuration, the first gap 76 and the second gap 77 generated when the heat radiating pipe 63 is disposed between the vacuum heat insulating material 65 and the outer box 62 are formed by the one end 64a of the aluminum tape 64 and the machine chamber. Since it extends to the constituent part 68, it communicates with the outside, so that gas such as foaming gas does not stay in the gap, and the first gap 76 and the second gap 77 expand when the ambient temperature changes. Thus, the outer surface of the outer box 62 at the portion where the heat radiating pipe 63 is provided can be prevented from being deformed.

Further, since one end 64a of the aluminum tape 64 extends to the machine chamber constituent part 68 and the other end 64b is located inside the end of the vacuum heat insulating material 65, as shown in FIG. At the time of foaming, some rigid urethane foam 75 intrudes from the gap between the vacuum heat insulating material 65 and the heat radiating pipe 63, but does not reach the other end 64 b of the aluminum tape 64. Therefore, since the first gap portion 76 and the second gap portion 77 near the other end 64b side of the aluminum tape 64 communicate with each other, the gas in the first gap portion 76 and the second gap portion 77 smoothly flows. Since the air is discharged outside the refrigerator, expansion and contraction of the gap due to a change in the ambient temperature do not occur, and the outer surface of the outer box 62 provided with the heat radiating pipe 63 can be reliably prevented from being deformed.

The groove 74 formed in the vacuum heat insulating material 65 facing the heat radiating pipe 63 is formed by the press portion 73 of the press 72 after the vacuum heat insulating material 65 is completed. There is no need to provide them, and the manufacturing process of the vacuum heat insulating material can be simplified.

(Embodiment 8)
FIG. 22 is an enlarged cross-sectional view of a main part of a refrigerator according to Embodiment 8 of the present invention. The description of the same configuration as those of the first to seventh embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 78 denotes pores previously arranged on the outer surface of the outer box 62 by a press or the like, and a plurality of pores 78 are linearly provided on the outer box 62 corresponding to the arrangement of the vacuum heat insulating material 65. I have.

In the above configuration, the gas in the gap between the vacuum heat insulating material 65 and the outer case 62, which is a factor of deformation of the outer case due to unevenness and warpage of the surface of the vacuum heat insulator 65, is smoothly discharged to the outside through the pores 78. Therefore, the expansion and contraction of the gap due to a change in ambient temperature do not occur, and the outer surface of the outer box 62 of the portion where the vacuum heat insulating material 65 is provided can be prevented from being deformed.

The arrangement of the pores 78 is not limited to a straight line, but may be a curved line or a polygonal line.

(Embodiment 9)
FIG. 23 is an enlarged cross-sectional view of a main part of a refrigerator according to Embodiment 9 of the present invention. The description of the same configuration as those of the first to eighth embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 79 denotes a vacuum heat insulating material, and one of the surfaces is a film 80 having an aluminum vapor-deposited layer, and the other surface is a film 81 having a metal foil. Affixed to outer box 62. The seal portion 82 between the film 80 having the aluminum vapor deposition layer and the film 81 having the metal foil is disposed so as to be bent toward the hard urethane foam 75 side.

In the above configuration, the film 80 having the aluminum vapor-deposited layer has a property that the thermal conductivity is low (heat is hardly transmitted), but the gas permeability is poor (easy to transmit) as compared with the film 81 having the metal foil. ing. Further, the film 81 having a metal foil has a property that gas permeability is good (it is difficult to transmit), but thermal conductivity is poor (heat is easily transmitted) as compared with the film 80 having an aluminum vapor deposition layer. . Therefore, the heat transfer path to the outer box 62 along the film 81 having the metal foil is long by bending the sealing portion 82 toward the film 81 having the metal foil that is easily conducting heat, that is, the rigid urethane foam 75 side. In addition, the distance between the seal portion 82 and the outer box 62 can be increased, so that heat transfer to the outer box 62 through the film can be suppressed, and the heat insulation can be improved.

As described above, the refrigerator according to the present invention can visually reduce the appearance deformation of the outer box surface, and is effective for maintaining the appearance quality of equipment having a heat insulating box using a vacuum heat insulating material.

Front view of refrigerator according to Embodiment 1 of the present invention Side sectional view of the refrigerator of the embodiment Front sectional view of the refrigerator of the embodiment Exploded view of the refrigerator compartment door of the embodiment before foaming Sectional view after foaming of FIG. Sectional view of the freezer compartment door of the refrigerator of the embodiment Exploded view of another refrigerator compartment door of the embodiment before foaming Sectional view after foaming of FIG. Front view of refrigerator according to Embodiment 2 of the present invention Sectional view of main part of side wall of refrigerator in Embodiment 3 of the present invention Principal part perspective view of the refrigerator of the embodiment Sectional view of main part of side wall of refrigerator according to Embodiment 4 of the present invention Sectional view of main part of side wall of refrigerator according to Embodiment 5 of the present invention Sectional drawing of the vacuum heat insulating material used for the refrigerator according to Embodiment 6 of the present invention. Sectional view of another vacuum insulation material used in the refrigerator of the embodiment Sectional view of another vacuum insulation material used in the refrigerator of the embodiment FIG. 17 is a plan view showing a state before bending the outer box of the refrigerator according to the seventh embodiment of the present invention. The perspective view which shows the state after bending the outer box of the refrigerator of the embodiment. Sectional drawing of the principal part of the vacuum heat insulating material used for the refrigerator of the embodiment. Partial enlarged cross-sectional view to which a vacuum heat insulating material used in the refrigerator of the embodiment is applied. Exploded perspective view of essential parts of the other end of the aluminum tape after urethane injection and foaming of the refrigerator of the embodiment. Principal part enlarged sectional view of a refrigerator according to an eighth embodiment of the present invention. 9 is an enlarged sectional view of a main part of a refrigerator according to a ninth embodiment of the present invention. Sectional view of a door arranged at the front opening of a conventional refrigerator Enlarged view of part A in FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Refrigerator 11,52 Inner box 12,51,62 Outer box 13,55,75 Hard urethane foam 27,27a Refrigerating room door 28 Vegetable room door 29 Switching room door 30 Ice making room door 31 Freezing room door 32 , 33, 34, 35, 36, 37, 38, 38a, 38b, 39, 40, 41, 54, 65, 66, 67, 79 Vacuum heat insulating material 42, 45 Door inner plate 44 Frontmost part 49 Spacer 50 Outside door Plates 53, 61 Soft member 56 Hard member 58 First skin material 59 Second skin material 60 Space 63 Heat dissipation pipe 64 Aluminum tape 64a One end of aluminum tape 64b The other end of aluminum tape 68 Machine room constituent part 72 Press machine 74 Groove 78 Micropore 80 Film with aluminum evaporation layer 81 Film with metal foil

Claims (7)

In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, a protrusion formed on the inner side of the refrigerator and an uneven surface in the depth direction are formed on the inner box of the door constituting the front surface, The vacuum insulating material is attached to the frontmost portion of the stepped surface so as to cover the projecting portion, the hard urethane foam is injected and foamed, and the projecting portion is also formed from the inner box of the door and the space of the vacuum insulating material. A refrigerator filled with the rigid urethane foam. In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, the vacuum heat insulating material provided on the drawer-type door constituting the front surface is provided in a space between the inner case and the outer plate of the door. It is arranged, and a spacer is partially used between the vacuum heat insulating material and the door inner plate to be arranged in the space portion, and the spacer is arranged corresponding to a rail fixing portion for fixing a rail of the drawer type door. A refrigerator characterized by that: 3. The refrigerator according to claim 2, wherein the spacer is a member softer than the vacuum heat insulating material. The refrigerator according to claim 2 or 3, wherein the spacer has a substantially rectangular parallelepiped shape, and a flow direction at the time of foaming of the rigid urethane foam and a longitudinal direction of the spacer are matched. In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, a variation in the flatness of the surface of the vacuum heat insulator between the vacuum heat insulator and the outer case is absorbed to absorb the outer case. An interposed member made of a soft member softer than a vacuum heat insulating material that prevents deformation of the outer surface, and an interposed member made of a hard member harder than the vacuum heat insulating material that prevents transmission of an outer box deformation factor, A refrigerator, wherein the intervening members are arranged in the order of a hard member and a soft member from the outer box side. In a refrigerator having a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, a heat radiating pipe is provided between the vacuum heat insulating material and the outer case, and the vacuum heat insulating material faces the heat radiating pipe. By providing a groove in the portion of the above, the heat radiation pipe is fixed to the outer box with aluminum tape, and one end of the aluminum tape extends outside the refrigerator and the other end is located inside the vacuum heat insulating material, A refrigerator characterized in that a first gap between the aluminum tape and the outer box and a second gap between the aluminum tape and the groove of the vacuum heat insulating material communicate with the outside. In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, the vacuum heat insulating material is disposed on the outer case, and the outer case is disposed outside the outer case in accordance with the arrangement of the vacuum heat insulating material. A refrigerator characterized by providing pores on its surface.

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