JP2003028562A - Refrigerator and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator having higher heat insulation performance in which, even if a vacuum heat insulation member is applied with a high coating rate, no problem is caused as the strength of a box in relation to a refrigerator to which the vacuum heat insulation member is applied, and in relation to a method of manufacturing the refrigerator. SOLUTION: A vacuum heat insulation member 44 is disposed in contact with opposite side surfaces of an outer box of a door, a vacuum heat insulation member 41 is disposed in contact with a top surface of the outer box, and vacuum heat insulation members 47, 48, 49, and 50 are disposed in contact with a front surface of the outer box. A vacuum heat insulation member 43 and a vacuum heat insulation member 45 are disposed on surfaces constructing a bottom surface and a machine chamber 30 in contact with an inner box 22. Consequently, the vacuum heat insulation members 43, 45 disposed respectively on the bottom surface and the machine chamber 30 where surface temperature of the outer box 23 is higher are prevented from being exposed to high temperature, and henceforth deterioration of vacuum heat insulation performance with the lapse of time is suppressed to the minimum, and long term reliability of a vacuum heat insulation member is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator using a vacuum heat insulating material and a method for manufacturing the refrigerator.

[0002]

2. Description of the Related Art In recent years, for the purpose of energy saving and space saving of refrigerators, there is a method of using a vacuum heat insulating material having high heat insulating performance as one means for improving the heat insulating performance of the refrigerator, and the demand for energy saving increases more and more. Nowadays, it is an urgent task to improve the heat insulation performance by maximizing the use of a vacuum heat insulation material having a heat insulation performance of several times to ten times that of rigid urethane foam within an appropriate range. I can say. As means for realizing a refrigerator having high heat insulation performance using a vacuum heat insulating material, there is disclosed in Japanese Patent Laid-Open No. 6-1599.
The means described in Japanese Patent No. 22 is known.

FIG. 15 shows a side sectional view of a refrigerator described in Japanese Patent Laid-Open No. 6-159922. 1 is a refrigerator main body, and the whole space formed by an outer box 2 and an inner box 3 is
Covering with a bag-shaped paper material 4 which can be molded, the inside of the paper material 4 is filled with an inorganic porous filler 5, and a vacuum heat insulating material 6 is formed along the shape of the space surrounded by the inner and outer boxes. There is. With this configuration, it is possible to easily store the vacuum insulation material between the inner and outer boxes and to eliminate the work of closing the gap between the inner and outer boxes and the vacuum insulation material, and use only the vacuum insulation material without using rigid urethane foam. Since a heat insulating box can be configured, extremely high heat insulating performance can be secured.

[0004]

However, since the refrigerator described in the above-mentioned conventional example uses only the vacuum heat insulating material, which is inferior in strength to the rigid urethane foam, the heat insulating performance is high. There was a problem that it became very weak in terms of strength.

In view of the above problems, the present invention provides a refrigerator having no problem in box strength even when a large amount of vacuum heat insulating material is used and ensuring high heat insulating performance.

[0006]

According to a first aspect of the present invention, a hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, a top surface, back,
It is placed on each of the bottom surface and the front surface, and the coverage of the vacuum heat insulating material exceeds 50% and 80% or less with respect to the surface area of the outer box,
In a refrigerator having a machine room at the bottom, both sides, top, back and front of the vacuum heat insulating material are placed in contact with the outer box, and the bottom surface and the surface forming the machine room are placed in contact with the inner box. It was done.

According to the present invention, the vacuum heat insulating material is disposed from the portion having a large passing heat gradient inside and outside the box, and when the coverage exceeds about 50% of the outer box surface area, the heat absorption load of the refrigerator is reduced. Can be effectively suppressed, the energy saving effect can be enhanced, and by keeping the coverage rate to 80% or less, the use of a vacuum insulation material with a non-standard form or the work of arranging it in a part where work efficiency is poor It is possible to avoid a sharp increase in the cost ratio to the reduction of the heat absorption amount of the vacuum heat insulating material due to the pressure on the vacuum heat insulating material. it can.

Further, since the vacuum heat insulating material is arranged on both sides, the top surface, the back surface and the front surface in contact with the outer box, and the bottom surface and the surface constituting the machine room are arranged in contact with the inner box, the outer box is formed. The surface temperature of the vacuum insulation and the vacuum insulation placed in the machine room are not exposed to high temperatures, and the deterioration of the vacuum insulation performance over time can be minimized. Reliability is increased.

Further, since the vacuum heat insulating material is disposed in contact with either the outer box or the inner box forming the box body, the space distance formed by the rigid urethane foam can be sufficiently secured. Not only does the deterioration of heat insulation performance due to roughness and insufficient foaming occur, but also the strength of the box can be maintained.

According to a second aspect of the present invention, in the invention according to the first aspect, the inside of the refrigerator is divided into a refrigerating temperature zone and a freezing temperature zone by a heat insulating partition wall, and a vacuum is applied to the heat insulating partition wall. It is provided with a heat insulating material.

According to the present invention, in addition to the invention described in claim 1, it is possible to prevent excessive cooling in the vicinity of the partition wall in the refrigerating temperature zone by improving the heat insulation performance of the partition wall in the refrigerating temperature zone and the freezing temperature zone. Eliminates the need to install a heater, etc. Further, the thickness of the heat insulation partition wall can be reduced, and the effective internal volume can be increased.

According to a third aspect of the present invention, a rigid urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the vacuum heat insulating material is provided on both side surfaces, top surface, back surface, bottom surface, and front surface. In a refrigerator in which each surface is covered with a vacuum heat insulating material covering more than 50% and less than 80% of the surface area of the outer box, when a plurality of vacuum heat insulating materials are provided on a single surface, the end face separation part is It is located in the heat insulation compartment.

According to the present invention, in a refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and less than 80%, the heat absorption load is effectively suppressed in a state where the vacuum heat insulating material has a high utility value. Even when a plurality of vacuum heat insulating materials are installed side by side on a single surface, by locating the end face separation part of the vacuum heat insulating material whose heat insulating performance is lowered in the heat insulating partition part,
It is possible to effectively suppress a decrease in heat insulation performance and enhance the energy saving effect.

According to a fourth aspect of the present invention, a hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, top surface, back surface, bottom surface, and front surface. In a refrigerator in which each surface is covered with a vacuum heat insulating material covering more than 50% and less than 80% of the surface area of the outer box, when a plurality of vacuum heat insulating materials are provided on a single surface, the end face separation part is It is located in the region of the refrigeration temperature zone.

According to the present invention, in a refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and 80% or less, the endothermic load can be effectively suppressed while the vacuum heat insulating material has a high utility value. Also, even when a plurality of vacuum heat insulating materials are provided on a single surface, the end surface separation part of the vacuum heat insulating material whose heat insulating performance deteriorates is positioned in the region of the refrigerating temperature zone to effectively suppress the decrease of heat insulating performance. Therefore, the energy saving effect can be enhanced.

According to a fifth aspect of the present invention, a rigid urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, top surface, back surface, bottom surface, and front surface. In a refrigerator in which the coverage of the vacuum insulation material is more than 50% and less than 80% with respect to the surface area of the outer box, the end surface of each vacuum insulation material is located at the joint of the outer box formation. is there.

According to the present invention, in the refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and 80% or less and the heat absorbing load is effectively suppressed in a state where the utility value of the vacuum heat insulating material is high, By arranging the end surface of the vacuum heat insulating material at the joint for forming the outer box, the vacuum heat insulating material can be previously arranged in the outer box or the inner box to assemble the box body, which facilitates manufacturing.

According to a sixth aspect of the present invention, a hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, top surface, back surface, bottom surface, and front surface. In a refrigerator in which the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area of the outer box, one surface of the vacuum heat insulating material is an aluminum vapor deposition film,
The other surface is a film having a metal foil.

According to the present invention, in the refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and less than 80% and the heat absorbing load is effectively suppressed in a state where the utility value of the vacuum heat insulating material is high, By forming one surface of the heat insulating material that requires high heat insulation with an aluminum vapor-deposited film and the other surface that requires high gas barrier performance with a film having a metal foil, the sealing surface of the film is the vacuum heat insulating material body. Since it is the same surface as the one surface, the fin on the sealing surface can be easily treated, and a vacuum heat insulating material having high reliability and excellent heat insulating performance can be used.

According to a seventh aspect of the present invention, in the invention according to the sixth aspect, the aluminum vapor deposition film side of the vacuum heat insulating material is disposed so as to be in contact with the inner side of the outer box. A vacuum heat insulating material with high heat insulation performance can be effectively arranged, and there is no need to treat fins on the sealing surface.

The invention according to claim 8 of the present invention is the same as the invention according to claim 1, wherein a heat radiation pipe is sandwiched between the outer box and the vacuum heat insulating material.

According to the present invention, the heat of the radiating pipe can be reliably insulated by the vacuum heat insulating material, and the heat absorption load in the refrigerator can be efficiently reduced.

According to a ninth aspect of the present invention, in the invention according to the eighth aspect, the heat radiating pipe has a flat cross section.

According to the present invention, by making the cross section of the heat radiating pipe flat, the contact area between the heat radiating pipe and the outer box is increased, the heat radiating capacity is improved, and the heat absorption load into the refrigerator is efficiently achieved. Can be reduced.

According to a tenth aspect of the present invention, in the invention according to the eighth or ninth aspect, a sealing material is applied around the heat radiating pipe.

According to the present invention, by applying the sealing material around the heat radiating pipe, the gap between the heat radiating pipe and the vacuum heat insulating material is eliminated, and it is possible to suppress the unevenness and corrugation on the surface of the outer box, and the appearance is beautiful. Can be maintained.

According to an eleventh aspect of the present invention, in the invention according to the eighth or ninth aspect, a soft member is arranged between the heat radiation pipe and the vacuum heat insulating material.

According to the present invention, since the soft member is disposed between the heat radiating pipe and the vacuum heat insulating material, there is no gap between the heat radiating pipe and the vacuum heat insulating material, and it is possible to suppress unevenness and waviness on the outer box surface, and to improve the appearance. The beauty of can be maintained.

According to a twelfth aspect of the present invention, in the invention according to any one of the eighth to tenth aspects, a notch is formed on the end outer box side of the vacuum heat insulating material, A heat radiation pipe is arranged in the cutout portion.

According to the present invention, the vacuum heat insulating material is reliably positioned by disposing the heat radiating pipe in the cutout portion of the vacuum heat insulating material on the side of the end outer box.

According to a thirteenth aspect of the present invention, in the invention according to the eighth aspect, the vacuum heat insulating material is pressure-welded to the outer box at 200 to 800 N / cm 2 with the heat radiation pipe interposed therebetween.

According to the present invention, the radiating pipe is surely brought into close contact with the vacuum heat insulating material, the gap between the heat radiating pipe and the vacuum heat insulating material is eliminated, and the unevenness and corrugation of the outer box surface can be suppressed, and the appearance is beautiful. Can be maintained.

According to a fourteenth aspect of the present invention, a hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, a top surface, a back surface, a bottom surface, and a front surface. In a refrigerator in which the coverage rate of the vacuum heat insulating material is more than 50% and less than 80% with respect to the surface area of the outer box, the heat radiation pipe provided in the outer box is only the front opening of the refrigerator. Is.

According to the present invention, in the refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and 80% or less, the endothermic load can be effectively suppressed while the vacuum heat insulating material has a high utility value. Since the heat absorbed from the surface forming the box does not include the heat of the heat radiation pipe other than the opening on the front surface of the refrigerator, the amount of heat absorbed into the refrigerator can be further reduced and the energy saving effect can be further enhanced.

According to a fifteenth aspect of the present invention, in the invention according to any one of the first to fourteenth aspects, a hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box. The thickness ratio of the vacuum heat insulating material is set to 20 or more and 60 or less with respect to the thickness of the outer box plate.

According to the present invention, a composite heat insulating wall with a vacuum heat insulating material can be constructed within a range in which the fluidity of the rigid urethane foam can be maintained while preventing the outer box from waving or deforming, and the outer volume of the heat insulating box. It is possible to increase the volumetric efficiency of the internal volume with respect to.

According to a sixteenth aspect of the present invention, in the invention according to any one of the first to fourteenth aspects, a core is provided inside the gas barrier film with respect to the thickness of the vacuum heat insulating material. The length ratio of the end sealing portion of the vacuum heat insulating material in which the material is sealed and the end is sealed is set to 0.5 or more and 2.0 or less.

According to the present invention, it is possible to reduce the heat absorption from the end sealing portion to the interior while ensuring the sealing reliability of the end sealing portion of the gas barrier film.

According to a seventeenth aspect of the present invention, in the invention according to any one of the first to fourteenth aspects, the length of the end sealing portion of the vacuum heat insulating material is outside The ratio of the wall thickness of the box to the inner box is set to 2 or more and 5 or less.

According to the present invention, it is possible to appropriately reduce the heat absorption from the end sealing portion of the vacuum heat insulating material to the inside of the refrigerator.

According to the eighteenth aspect of the present invention, the vacuum heat insulating material is disposed on at least both side surfaces and the top surface of the outer box, and heat radiating pipes for the refrigeration cycle are conducted to both side surfaces and the top surface of the outer box. In this case, the heat radiating pipe is fixed to the outer box on the flat plate in advance, and the vacuum heat insulating material is attached to both side surfaces of the outer box before the outer box on the flat plate is bent together with the heat radiating pipe into a U shape. It is a method for manufacturing a refrigerator in which the vacuum heat insulating material is attached to the top surface after being attached and bent.

According to the present invention, the vacuum heat insulating material can be prevented from peeling off due to the displacement of the heat radiating pipe when the outer box is bent, and the reliability of the vacuum heat insulating material attaching step can be improved.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIGS. 1 to 4 show a refrigerator according to an embodiment of the present invention. FIG. 1 is a side sectional view of the refrigerator, and FIG. 2 is a front sectional view of the refrigerator. In FIGS. 1 and 2, reference numeral 21 denotes a refrigerator main body, and a space formed by an inner box 22 made of a synthetic resin such as ABS and an outer box 23 made of a metal such as an iron plate is filled with a hard urethane foam 24. . Reference numeral 25 denotes a heat insulating partition wall, which forms a refrigerating compartment 26 and a vegetable compartment 27 at the upper portion of the heat insulating partition wall 25 and freezing compartments 28 and 29 at the lower portion. 30 is the refrigerator main body 2
A compressor room 31 is disposed inside a machine room located below the rear part of the compressor 1. 32 is a refrigerating cooler, 33 is a refrigerating blower, 34 is a refrigerating cooler, and 35 is a refrigerating blower.
Is a condenser disposed on the bottom surface of the refrigerator main body 21.

A refrigerator compartment door 37, a vegetable compartment door 38, and freezer compartment doors 39 and 40 are provided at the front opening of the refrigerator main body 21. 41, 42, 43, 44, 45, 46,
Reference numerals 47, 48, 49 and 50 denote vacuum heat insulating materials which together with the hard urethane foam 24 form the heat insulating box 21a.

Here, the vacuum heat insulating materials 41, 42 and 44 are
The outer box 23 is attached so as to be in contact with the top surface, the back surface, and the inside of the side surface, respectively. Further, the vacuum heat insulating materials 43 and 45 are attached in contact with the bottom surface of the inner box 22 and the machine room constituting surface, respectively. In addition, the vacuum heat insulating material 46 is used for the heat insulating partition wall 25.
It is arranged inside.

The vacuum heat insulating materials 42 and 44 arranged on the back surface and the side surface are composed of a plurality of sheets, and the end face separating portions facing each other are positioned and arranged on the heat insulating partition wall 25.

Further, a refrigerator compartment door 37, a vegetable compartment door 38, and a freezer compartment door 3 arranged at the front opening of the refrigerator main body 21.
Vacuum insulation materials 47, 48, 4 are provided inside 9 and 40, respectively.
9, 50 are arranged so as to contact the outer iron plate of each door.

Further, the rigid urethane foam 24 and the vacuum heat insulating materials 42, 43, 4 surrounding the freezing chambers 28, 29 in the freezing area.
The heat insulating wall thickness of the heat insulating box 21a formed by 4 and 45 is 25 to 50 m including the thin wall portion of the opening except the door.
In the distribution of m, the rigid urethane foam 24 surrounding the refrigerating compartment 26 and the vegetable compartment 27 in the refrigerating region and the vacuum heat insulating materials 41, 42, 4
The heat insulation wall thickness of the heat insulation box 21a formed by 4 is 25 to 40 mm including the thin wall portion of the opening except the door.

As described above, the vacuum insulating material is attached to the refrigerator main body 2
By the configuration arranged on both side surfaces of 1, the top surface, the back surface, the bottom surface, and the front surface, the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area of the outer box.

Coverage of vacuum insulation exceeds 50% and exceeds 80%
What is set below is that when a large amount of vacuum heat insulating material is arranged and the covering rate is to be maximized, parts (not shown) of the refrigerator main body 21 and parts having a special structure (uneven shape, pipe, drain pipe For example, a special form of vacuum heat insulating material is required at the installation site or the workability of attaching the vacuum heat insulating material becomes very poor.

Therefore, approximately 80% of the surface area of the outer box 23
Even if a vacuum heat insulating material is disposed beyond the above range, the above-mentioned use efficiency is lowered and the utility value is saturated, and the effect of improving the heat insulating performance against the introduction of the vacuum heat insulating material is significantly reduced.

Therefore, the effect of using a large amount of the vacuum heat insulating material is not saturated by keeping the coverage of the vacuum heat insulating material on the surface area of the outer box 23 to 80% as in the present embodiment. The heat absorption load amount can be effectively suppressed in a state where the utility value is high, and the energy saving effect can be enhanced.

Further, a coverage of 80% is obtained by disposing a large-sized vacuum heat insulating material capable of substantially covering both side surfaces, top surface, back surface, bottom surface, and front surface of the heat insulating box 21a. Good workability for pasting.

Therefore, the use of the heat insulating box 21a does not significantly reduce the investment effect due to the use of a non-standard type vacuum heat insulating material or the work of disposing the vacuum heat insulating material in a portion with poor work efficiency. The balance between the increase in the initial cost of the refrigerator main body 21 and the reduction in the running cost due to the energy saving is not lost, and the value as the life cycle cost can be increased.

Further, if the coverage is arranged from a portion having a large passing heat gradient inside and outside the heat insulating box 21a and the coverage exceeds about 50% of the surface area of the outer box 23, the heat absorption load amount of the heat insulating box is effective. The energy saving effect can be enhanced.

Further, the vacuum heat insulating material 42 is arranged on the back panel in advance and then joined to the side surface and the top surface formed by bending a flat plate into a U-shape to form the outer box 23. Then, the end surface of the vacuum heat insulating material 42 is arranged so as to be located in the vicinity of the joint for forming the outer box.

FIG. 3 is an enlarged cross-sectional view of a main part of the vacuum heat insulating material applied to the refrigerator of this embodiment, and FIG. 4 is an enlarged partial cross-sectional view of the refrigerator of the same embodiment.

In the figure, reference numeral 41 denotes a vacuum heat insulating material having a core material 52 inside. The core material 52 is formed by heating and drying an inorganic fiber aggregate such as glass wool, and then inserting it into the outer covering material in which the vapor deposition layer film 53 and the metal foil layer film 57 are bonded, and vacuuming the inside to seal the opening. It is formed by The vapor deposition layer film 53 is an aluminum vapor deposition film 55.
Is a composite plastic film sandwiched by a nylon film 54 and a high-density polyethylene film 56, and the metal foil layer film 57 is a composite plastic film sandwiched by an aluminum foil 59 between a nylon film 58 and a high-density polyethylene film 60. In addition, the sealing surface between the vapor deposition layer film 53 and the metal foil layer film 57 has a plane surface on the vapor deposition layer film 53 side, and the surface on the metal foil layer film 57 side is three-dimensionally configured. The vapor deposition layer film 53 side is placed in contact with the outer box 23.

Here, when the fiber diameter of the inorganic fiber aggregate 52 is in the range of 0.1 μm to 1.0 μm and the thermal conductivity of the rigid urethane foam 24 is 0.015 W / mK, the same result is obtained. Has a thermal conductivity of 0.00
The vacuum heat insulating material 41 is applied as the heat insulating material of 15 W / mK. That is, the vacuum heat insulating material 41 having a heat insulating performance 10 times higher than that of the rigid urethane foam 24 is applied.

With the above structure, the cooling device including the compressor 31, the refrigerating cooler 32, the refrigerating blower 33, the freezing cooler 34, the freezing blower 35, and the condenser 36
Refrigerator room 26 and vegetable room 27 are approximately 0 to 10 ° C., freezer room 2
8, 29 are cooled to a temperature of approximately -15 to -25 ° C.

Then, the vacuum heat insulating material is arranged from the portion having a large passing heat gradient inside and outside the box, and if the coverage exceeds about 50% of the surface area of the outer box, the heat absorption load of the refrigerator is effectively increased. It can be suppressed, the energy saving effect can be enhanced, and by keeping the coverage rate below 80%,
It is possible to avoid a rapid increase in the cost ratio to the reduction of the heat absorption amount of the vacuum heat insulating material due to the use of a vacuum heat insulating material having a non-standard form and the work of disposing the vacuum heat insulating material in a portion with poor work efficiency. It is possible to effectively suppress the heat absorption load and enhance the energy saving effect in a state where the utility value of is high.

Further, the vacuum heat insulating material 44 is in contact with both sides, the vacuum heat insulating material 41 is in the top surface, the vacuum heat insulating material 42 is in the back surface, and the vacuum heat insulating materials 47, 48, 49, 50 are in contact with the outer box of the door body which is the front surface. Since the vacuum heat insulating material 43 and the vacuum heat insulating material 45 are arranged in contact with the inner box 22 on the bottom surface and the surface constituting the machine room 30, the bottom surface and the machine room 30 where the surface temperature of the outer box 23 becomes high. The vacuum heat insulating materials 43 and 45 arranged at are not exposed to high temperature, the deterioration of the heat insulating performance of the vacuum heat insulating performance over time can be suppressed to the minimum, and the long-term reliability of the vacuum heat insulating material is enhanced.

Further, since the vacuum heat insulating material is disposed in contact with either the outer box 23 or the inner box 22 which constitutes the heat insulating box 21a, the space distance formed by the rigid urethane foam can be sufficiently secured, and the hard insulating foam can be made rigid. Not only does the deterioration of heat insulation performance due to the roughness of urethane foam and insufficient foaming occur, but also the box strength can be maintained.

Further, since the vacuum heat insulating material 41 on the top surface is arranged in contact with the outer box, it becomes possible to attach the interior lighting mounting member or the electric wire (not shown) to the top surface of the inner box 22, Lighting can be provided on the top surface of the refrigerating room 26, which improves usability.

In addition, the rigid urethane foam 24 and the vacuum heat insulating materials 42, 43, 4 surrounding the freezing chambers 28, 29 in the freezing area.
The heat insulating wall thickness of the heat insulating box 21a formed by 4 and 45 is 25 to 50 m including the thin wall portion of the opening except the door.
In the distribution of m, the rigid urethane foam 24 surrounding the refrigerating compartment 26 and the vegetable compartment 27 in the refrigerating region and the vacuum heat insulating materials 41, 42, 4
The heat insulation wall thickness of the heat insulation box 21a formed by 4 is 25 to 40 mm including the thin wall portion of the opening except the door, and the thickness of the heat insulation wall is 10 to 15 mm.
Since the vacuum heat insulating material is provided, the thickness of the hard urethane foam 24 to be filled is at least 10 mm. For this reason, the flowability of the rigid urethane foam 24 at the time of foaming is not hindered, and the deterioration of the heat insulating property due to the roughness of the foam or the defective filling is not caused.

As described above, the rigid urethane foam 2 is ensured while ensuring the thickness of the vacuum heat insulating material and sufficiently exhibiting the heat insulating property.
The heat insulating property of the multilayer heat insulating wall can be effectively enhanced while maintaining the heat insulating property of No. 4. In particular, it is more effective in the freezing temperature region where the temperature gradient inside and outside the refrigerator is large.

The heat insulation wall thickness of the freezer compartments 28 and 29 is set to 5
By not exceeding 0 mm, the application of the vacuum heat insulating material can be utilized to increase the internal volume of the freezing chambers 28, 29 having a relatively small volume ratio without affecting the external layout, and the vacuum heat insulating material can be utilized. The utility value of can be increased.

Further, by keeping the heat insulation wall thickness of the refrigerator compartment 26 and the vegetable compartment 27 not to exceed 40 mm, energy can be saved by applying a vacuum heat insulating material in the refrigerator temperature region where the temperature gradient inside and outside the refrigerator is relatively small. The effect of improving the inner volume efficiency inside and outside the heat insulating box 21a can be balanced.

Further, since the inside of the refrigerator is divided into the refrigerating temperature zone and the freezing temperature zone by the heat insulating division wall 25, and the vacuum heat insulating material 46 is arranged on the heat insulating division wall 25, the division between the refrigeration temperature zone and the freezing temperature zone. The heat insulation performance of the wall is improved, the vegetable compartment 27 located in the lower part of the refrigerating temperature zone can be prevented from being overcooled, and the need for installing a heater or the like is eliminated. At the same time, the thickness of the heat insulating partition wall 25 can be reduced, and the effective internal volumes of the vegetable compartment 27 and the freezer compartments 28, 29 can be increased.

Further, a plurality of vacuum heat insulating materials 42 and 44 arranged on the back surface and the side surface of the heat insulating box 21a are arranged side by side, and the facing end face separating portions are positioned and arranged on the heat insulating partition wall 25. Therefore, by arranging the end surface separated portions of the vacuum heat insulating materials 42 and 44 whose heat insulating performance is lowered in the heat insulating partition 25, even if the vacuum heat insulating materials 42 and 44 are arranged in a divided manner, the heat insulating performance is effectively reduced. The decrease can be suppressed and the energy saving effect can be enhanced.

Further, by locating the end surface separated portions of the vacuum heat insulating materials 42 and 44 in the heat insulating partition 25, the flowability of the rigid urethane foam to the heat insulating partition 25 can be improved.

Further, the vacuum heat insulating material 42 is previously arranged on the back panel, and then the flat plate is bent into a U-shape and joined to the side surface and the top surface to form the outer box 23, thereby forming the outer box. Since it is located near the seam,
The end surface of the vacuum heat insulating material 42 can be arranged in a size almost equal to that of the rear panel, the heat insulating performance is improved, and the vacuum heat insulating material can be arranged in advance in the outer box or the inner box to assemble the box body. Therefore, the manufacturing becomes easy.

The vacuum heat insulating material 41 has a vapor deposition layer film 53 on one surface and a metal foil layer film 57 on the other surface, and the sealing surface of the film is the same surface as the one surface of the main body of the vacuum heat insulating material 41. The fins on the sealing surface can be easily treated, and a vacuum heat insulating material having high reliability and excellent heat insulating performance can be used.

Further, the aluminum vapor deposition film side of the vacuum heat insulating material 41, which has poor heat conduction (good heat insulating performance) as compared with the metal foil, is arranged in contact with the inner side of the outer case, and the outer case 23 and the vacuum are disposed. The heat transfer of the heat insulating material 41 is suppressed, the heat absorption from the outside is reduced, and the vacuum heat insulating material having high reliability and excellent heat insulating performance can be effectively arranged in the heat insulating wall, and the fin of the sealing surface is also treated. No longer needed.

By disposing the vacuum heat insulating material 42 on the back surface of the heat insulating box 21a, the vacuum heat insulating material 42 drains the defrosting water from the piping of the cooling device, the refrigerating cooler 32, and the freezing cooler 34. It can solve the problem of obstructing the drain pipe (not shown), and the rear panel and the vacuum heat insulating material 4
2 can be assembled as an integrated product, which is also advantageous in the manufacturing process.

(Second Embodiment) FIG. 5 is a front vertical sectional view of a refrigerator according to a second embodiment of the present invention. Note that 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, a plurality of vacuum heat insulating materials 42 and 44 are provided on the back and side surfaces, and the facing end face separating portions are located and arranged in the vegetable compartment 27 which is the region of the refrigerating temperature zone.

Therefore, by arranging the end face separated portions of the vacuum heat insulating materials 42 and 44, whose heat insulating performance is deteriorated, on the wall surface of the vegetable compartment 27 having the smallest temperature difference from the outside air, the vacuum heat insulating materials 42, 44 can be placed on the same surface. Even when 44 is divided and arranged, it is possible to effectively suppress the deterioration of the heat insulating performance and enhance the energy saving effect.

(Third Embodiment) FIG. 6 is a plan sectional view of a refrigerator according to a third embodiment of the present invention, and FIG. 7 is a partially enlarged view of the vicinity of a heat radiating pipe of the refrigerator according to the third embodiment. The description of the same configurations as those of the first and second embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 61 is a radiating pipe as a condenser forming a part of the refrigerating cycle, which is arranged in contact with the side surface or the back surface of the outer box 23 and is covered with an aluminum tape 62 having good heat conduction from the upper surface thereof. It is fixed to the box 23. A vacuum heat insulating material 44 is arranged so as to cover the heat radiation pipe 61. Reference numeral 63 is a sealing material, which is applied between the heat radiating pipe 61 and the vacuum heat insulating material 44 so as not to generate an air layer.

When the sealing material 63 is not applied, the vacuum heat insulating material 44 is brought into pressure contact with a force of 200 N to 800 N / cm 2.

The heat dissipation pipe 61 has a flat cross section in order to increase the contact area with the outer box 23.

In the above structure, since the heat radiation pipe 61 is attached between the outer box 23 and the vacuum heat insulating material 44, the heat of the heat radiation pipe is surely insulated by the vacuum heat insulating material to absorb heat into the refrigerator. The load can be efficiently reduced.

Further, since the heat radiating pipe 61 has a flat cross section, the contact area between the heat radiating pipe 61 and the outer box 23 increases, the heat radiating ability is improved, and the heat absorption load into the refrigerator is efficiently reduced. You can Further, since the thickness of the heat radiation pipe 61 in the outer box 23 direction can be made smaller than that of the cylindrical shape, the depression when the vacuum heat insulating material 44 is pressed can be reduced and the fixing can be facilitated.

A sealing material 6 is provided around the heat dissipation pipe 61.
Since No. 3 is applied, the gap between the heat dissipation pipe 61 and the vacuum heat insulating material 44 is eliminated, and it is possible to suppress irregularities and waviness on the surface of the outer box 23, and to maintain the appearance.

Moreover, without applying the sealing material 63, the vacuum heat insulating material 44 is placed on the outer box 23 by sandwiching the heat radiating pipe 61.
By pressing at 0 to 800 N / cm2, the heat radiation pipe 61 is initially pushed into the plane surface, the vacuum heat insulating material 44 is not damaged, and the heat radiation pipe 61 and the vacuum heat insulating material 44 are arranged without a gap. I understood it. Therefore, the radiating pipe 61 surely comes into close contact with the vacuum heat insulating material 44, the gap between the heat radiating pipe 61 and the vacuum heat insulating material 44 is eliminated, unevenness and waviness on the surface of the outer box 23 can be suppressed, and the appearance is kept beautiful. be able to.

By using a soft member having a double-sided adhesive layer instead of the sealing material 63, the gap between the heat radiation pipe 61 and the vacuum heat insulating material 44 can be eliminated without requiring a large force. Therefore, the gap between the heat radiating pipe 61 and the vacuum heat insulating material 44 is eliminated, and it is possible to suppress the unevenness and waviness on the surface of the outer box 23, and to maintain the beauty of the appearance.

(Fourth Embodiment) FIG. 8 is a partially enlarged view of the vicinity of a heat dissipation pipe of a refrigerator according to a fourth embodiment of the present invention. The description of the same configurations as those of the first to third embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 64 designates a cutout portion provided on the end outer casing side of the vacuum heat insulating material 44, and the heat radiation pipe 61 is arranged in the cutout portion 64.

With the above structure, when the vacuum heat insulating material 44 is provided, no special process is required, the positioning of the vacuum heat insulating material is ensured, and efficient sticking work can be performed.

Furthermore, the adhesion between the vacuum heat insulating material 44 and the outer box 23 is improved, voids are eliminated, irregularities and waviness on the surface of the outer box 23 can be suppressed, and the appearance can be kept beautiful.

(Fifth Embodiment) FIG. 9 is a perspective view of an outer box plate of a refrigerator before bending according to a fifth embodiment of the present invention,
FIG. 10 is a perspective view after the outer box flat plate is bent. In addition,
A description of the same configurations as those of the first to fourth embodiments will be omitted, and only different points will be described.

In the figure, the outer box 23 is in a flat plate state before being bent into a U-shape, and the heat radiating pipe 61 is fixed to the side surface 67 and the top surface 66 with an aluminum tape 68. 44 is attached and fixed with double-sided tape or hot melt. After that, bend the bent portion 65 to the side surface 6.
7. As a boundary of the top surface 66, it is bent in a U shape using a jig. Then, after bending, the vacuum heat insulating material 41 is attached to the top surface 66.

By the above-mentioned operation, the outer box 2 using the jig is used.
When bending 3 into a U-shape, the top surface 6 of the heat dissipation pipe 61
In the A part of 6, the difference in the bending dimension between the outer box flat plate 23 and the heat dissipation pipe 61 occurs, and the A part moves inward, but at that time, the vacuum heat insulating material 41 is not fixed, and the top surface 6 after the bending.
Since the vacuum heat insulating material 41 is attached to 6, the vacuum heat insulating material 41 does not peel off or come off. Therefore, the reliability of the vacuum heat insulating material attaching step is improved.

(Sixth Embodiment) FIG. 11 is a plan sectional view of a refrigerator according to a sixth embodiment of the present invention. The description of the same configurations as those of the first to fifth embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 69 denotes a dry pipe provided in the opening of the front face of the refrigerator of the outer box 23. Only the dry pipe 69 is provided as the heat radiating pipe provided in the outer box 23, and heat is radiated as another condenser. The pipe is not provided directly in the outer box 23, but is provided, for example, in the refrigerator bottom space or the machine room space.

With the above construction, the temperature of the front opening of the refrigerator is raised by the heat generating action of the dry pipe 69 arranged in the front opening of the refrigerator to prevent sweating, and the outer box 23
Since the heat absorbed from the surface constituting the above does not include heat other than the dry pipe 69, the amount of heat absorbed into the refrigerator can be further reduced, and the energy saving effect can be further enhanced.

(Embodiment 7) FIG. 12 is an enlarged cross-sectional view of essential parts of a refrigerator according to Embodiment 7 of the present invention. In addition,
Description of the same configurations as those of the first to sixth embodiments will be omitted, and only different points will be described.

In the figure, the outer box 23 is a steel plate manufactured by a cold rolling mill and has a plate thickness t1 of 0.5 mm. Then, the vacuum heat insulating material 4 disposed between the inner box 22 and the outer box 23
The thickness t2 of No. 4 is 20 or more and 60 or less with respect to the plate thickness t1 of the outer box 23.

With the above structure, the outer appearance of the outer box 23 is deformed,
The plate thickness t1 capable of preventing corrugation is 0.5 mm or more, and the thickness of the vacuum heat insulating material 44 at that time is 10 to 30 mm.
Becomes Therefore, the rigid urethane foam 24 and the vacuum heat insulating materials 42 and 43, which surround the freezing chambers 28 and 29 in the freezing area,
The heat insulating wall thickness of the heat insulating box 21a formed by 44 and 45 is
Except for the door, including the thin wall portion of the opening, 25 to 50
The thickness of the rigid urethane foam 24 to be filled is 15 to 20 mm with respect to mm. Further, the heat insulation box 2 formed by the rigid urethane foam 24 surrounding the refrigerating compartment 26 and the vegetable compartment 27 in the refrigerating region and the vacuum heat insulating materials 41, 42, 44.
The insulating wall thickness of 1a is 25 to 40 mm including the thin wall portion of the opening except for the door, and the thickness of the rigid urethane foam 24 to be filled is 10 to 15 mm. For this reason, the flowability of the rigid urethane foam 24 at the time of foaming is not hindered, and the deterioration of the heat insulating property due to the roughness of the foam or the defective filling is not caused.

Therefore, the rigid urethane foam 24 is ensured while ensuring the thickness of the vacuum heat insulating material so that the heat insulating property is sufficiently exhibited.
The heat insulating property of the multi-layer heat insulating wall can be effectively improved by maintaining the heat insulating property of

As described above, the ratio of the thickness t2 of the vacuum heat insulating material 44 to the thickness t1 of the thickness of the outer box 23 is 2
By setting it to 0 or more and 60 or less, it is possible to configure a composite heat insulating wall with a vacuum heat insulating material within a range in which the fluidity of the rigid urethane foam can be maintained while preventing the outer box from waviness and deformation, The volumetric efficiency of the internal volume with respect to the volume can be increased.

(Embodiment 8) FIG. 13 is an enlarged cross-sectional view of essential parts of a refrigerator according to Embodiment 8 of the present invention. In addition,
A description of the same configurations as those of the first to seventh embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 70 denotes an end portion sealing portion of an outer covering material in which the vapor deposition layer film 53 of the vacuum heat insulating material 44 and the metal foil layer film 57 are bonded together, and with respect to the thickness t4 of the vacuum heat insulating material 44, The ratio of the length t3 of the end sealing portion 70 is 0.5 or more and 2.0 or less.

The length t3 of the end sealing portion 70 is preferably as long as possible in terms of the sealing reliability of the end sealing portion 70 of the gas barrier film. On the other hand, in terms of heat leakage (heat insulation performance) due to heat conduction from the end sealing portion 70, it is preferable to make the length as short as possible.

The rigid urethane foam 24 and the vacuum heat insulating materials 42, 43, 44, 4 surrounding the freezing chambers 28, 29 in the freezing area.
The heat insulating wall thickness of the heat insulating box 21a formed by 5 is a hard wall surrounding the refrigerating room 26 and the vegetable room 27 in the refrigerating area in a distribution of 25 to 50 mm including the thin wall portion of the opening except the door. Urethane foam 24 and vacuum insulation materials 41, 42, 44,
The heat insulation wall thickness of the heat insulation box 21a formed by
When the distribution of the wall thickness of the opening is 25 to 40 mm including the thin wall portion, the optimum thickness t4 of the vacuum heat insulating material 44 is 15 mm, and the length t3 of the end sealing portion 70 is 10 mm. You can secure the sex. Further, from the viewpoint of impeding the fluidity of the rigid urethane foam 24, there is no problem if the length t3 of the end sealing portion 70 is up to 20 mm.

As described above, with respect to the thickness dimension t4 of the vacuum heat insulating material, the length of the end sealing portion of the vacuum heat insulating material in which the core material is sealed inside the gas barrier film and the end portion is sealed. By setting the ratio of t3 to 0.5 or more and 2.0 or less, heat absorption from the end sealing part 70 to the interior is reduced while ensuring the sealing reliability of the end sealing part 70 of the gas barrier film. it can.

(Ninth Embodiment) FIG. 14 is an enlarged cross-sectional view of essential parts of a refrigerator according to a ninth embodiment of the present invention. In addition,
A description of the same configurations as those of the first to eighth embodiments will be omitted, and only different points will be described.

In the figure, reference numeral 71 denotes an end sealing portion of an outer covering material in which the vapor deposition layer film 53 of the vacuum heat insulating material 44 and the metal foil layer film 57 are bonded to each other, and has a length t5 of the end sealing portion 71. On the other hand, the ratio of the thickness t6 of the multilayer heat insulating wall of the vacuum heat insulating material 44 and the rigid urethane foam 24 is set to 2 or more and 5 or less.

The length t3 of the end sealing portion 71 is preferably as long as possible from the viewpoint of sealing reliability of the end sealing portion 71 of the gas barrier film. On the other hand, in terms of heat leakage (heat insulation performance) due to heat conduction from the end sealing portion 71, it is preferable to make the length as short as possible.

Hard urethane foam 24 and vacuum heat insulating materials 42, 43, 44, 4 surrounding the freezing chambers 28, 29 in the freezing area.
The heat insulation wall thickness of the heat insulation box 21a formed by 5 is a hard wall surrounding the refrigerating compartment 26 and the vegetable compartment 27 in the refrigerating region in a distribution of 25 to 50 mm including the thin wall portion of the opening except for the door. Urethane foam 24 and vacuum insulation materials 41, 42, 44,
The heat insulation wall thickness of the heat insulation box 21a formed by
When the distribution is 25 to 40 mm including the thin wall portion of the opening, the optimum thickness of the vacuum heat insulating material 44 is 15 mm, the length t5 of the end sealing portion 71 is 10 mm, and the sealing reliability is 10 mm. Can be secured.

As described above, the ratio of the thickness t6 of the multilayer heat insulating wall of the vacuum heat insulating material 44 and the rigid urethane foam 24 to the length t5 of the end sealing portion 71 is set to 2 or more and 5 or less. Since the setting is made, the sealing reliability of the vacuum heat insulating material 44 can be ensured, and the heat absorption from the end sealing portion 71 of the vacuum heat insulating material 44 to the interior can be appropriately reduced, so that the reliability is high and the heat insulating performance is excellent. A refrigerator can be provided.

[0114]

As described above, the invention according to claim 1 is provided with the rigid urethane foam and the vacuum heat insulating material between the outer box and the inner box, and the vacuum heat insulating material is provided on both sides, the top surface, the back surface and the bottom surface. ,
And the front surface of the outer box, the coverage of the vacuum insulation material to the surface area of the outer box is more than 50% and 80% or less, and the vacuum insulation material is provided on both side surfaces in a refrigerator having a machine room at the bottom. Since the top surface, the back surface, and the front surface are arranged in contact with the outer box, and the bottom surface and the surface forming the machine room are arranged in contact with the inner box,
When the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is more than 50% and 80% or less, the heat absorption load amount can be effectively suppressed and the energy saving effect can be enhanced while the vacuum heat insulating material has a high utility value.

Further, the vacuum heat insulating material disposed in the bottom surface where the surface temperature of the outer box becomes high and the machine room is not exposed to high temperature, and deterioration of the heat insulating performance of the vacuum heat insulating performance with time can be minimized. This improves the long-term reliability of the vacuum insulation material.

Furthermore, since the vacuum heat insulating material is placed in contact with either the outer box or the inner box that constitutes the box body, a sufficient space distance formed by the rigid urethane foam can be secured, and the rigid urethane foam is roughened. Not only does the insulation performance decrease due to insufficient foaming, but also the box strength can be maintained.

The invention described in claim 2 is the same as claim 1
In the invention described in (1), the inside of the refrigerator is divided into a refrigerating temperature zone and a freezing temperature zone by a heat insulating partition wall, and a vacuum heat insulating material is arranged on the heat insulating partition wall. It can prevent overcooling and eliminates the need for installing a heater or the like. Further, the thickness of the heat insulation partition wall can be reduced, and the effective internal volume can be increased.

Further, the invention according to claim 3 is provided with a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box,
In a refrigerator in which the vacuum heat insulating material is arranged on both sides, the top surface, the back surface, the bottom surface, and the front surface, and the coverage of the vacuum heat insulating material is more than 50% and less than 80% with respect to the surface area of the outer box, When a plurality of vacuum heat insulating materials are provided on one surface, by positioning the end face separation portion in the heat insulating partition portion, it is possible to effectively suppress a decrease in heat insulating performance and enhance the energy saving effect.

Further, the invention according to claim 4 is provided with a hard urethane foam and a vacuum heat insulating material between the outer box and the inner box,
In a refrigerator in which the vacuum heat insulating material is arranged on both sides, the top surface, the back surface, the bottom surface, and the front surface, and the coverage of the vacuum heat insulating material is more than 50% and less than 80% with respect to the surface area of the outer box, When installing multiple vacuum insulation materials on one surface, by locating the end surface separation part in the area of the refrigeration temperature zone, the end surface separation part of the vacuum insulation material whose thermal insulation performance deteriorates is located in the area of the refrigeration temperature range. It is possible to effectively suppress the deterioration of the heat insulation performance and enhance the energy saving effect.

The invention according to claim 5 further comprises a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box,
In the refrigerator in which the vacuum heat insulating material is arranged on each side, top surface, back surface, bottom surface, and front surface, and the coverage of the vacuum heat insulating material is more than 50% and less than 80% with respect to the surface area of the outer box, By locating the end surface of the vacuum heat insulating material at the joint for forming the outer box, the vacuum heat insulating material can be arranged in advance in the outer box or the inner box to assemble the box body, which facilitates manufacturing.

The invention according to claim 6 further comprises a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box,
In a refrigerator in which a vacuum heat insulating material is arranged on each side surface, top surface, back surface, bottom surface, and front surface, and the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area of the outer box, The vacuum heat insulating material has an aluminum vapor-deposited film on one side and a film with a metal foil on the other side, so that the sealing surface of the film is the same surface as the one side of the vacuum heat insulating material body, and the fins on the sealing surface can be easily treated. In addition, it is possible to use a vacuum heat insulating material having high reliability and excellent heat insulating performance.

The invention described in claim 7 is the same as that of claim 6.
In the invention described in 1, the aluminum vapor deposition film side of the vacuum heat insulating material is disposed in contact with the inner side of the outer box, and the vacuum heat insulating material having high reliability and excellent heat insulating performance can be effectively arranged, and the sealing surface No need for fin treatment.

The invention described in claim 8 is the same as claim 1
In the invention described in (1), since the heat radiation pipe is attached between the outer box and the vacuum heat insulating material, the heat of the heat radiation pipe is surely insulated by the vacuum heat insulating material, and the heat absorption load in the refrigerator is efficiently reduced. be able to.

The invention described in claim 9 is the same as claim 8
In the invention described in (1), since the heat dissipation pipe has a flat cross section, the contact area between the heat dissipation pipe and the outer box is increased, the heat dissipation capability is improved, and the heat absorption load into the refrigerator can be efficiently reduced. .

Further, in the invention described in claim 10, in the invention described in claim 8 or claim 9, since the sealing material is applied around the heat radiating pipe, the gap between the heat radiating pipe and the vacuum heat insulating material is eliminated, It is possible to suppress the unevenness and waviness on the surface of the outer box and maintain the beautiful appearance.

The invention according to claim 11 is the invention according to claim 8 or 9, wherein a soft member is arranged between the heat radiating pipe and the vacuum heat insulating material. Since the voids in the outer box are eliminated, it is possible to suppress unevenness and waviness on the outer box surface, and to maintain the beauty of the appearance.

Further, the invention according to claim 12 is the invention according to any one of claims 8 to 10, wherein a notch is formed on the end outer box side of the vacuum heat insulating material, Since the heat radiating pipe is arranged in the notch, the vacuum heat insulating material can be reliably positioned without requiring a special process.

Further, in the invention described in claim 13, in the invention described in claim 8, since the vacuum heat insulating material is pressure-welded to the outer box at 200 to 800 N / cm2 by sandwiching the heat radiation pipe, the heat radiation pipe is vacuumed. It firmly adheres to the heat insulating material, eliminates the gap between the heat radiating pipe and the vacuum heat insulating material, and can suppress irregularities and waviness on the surface of the outer box and maintain the appearance.

The invention as set forth in claim 14 is provided with a rigid urethane foam and a vacuum heat insulating material between the outer box and the inner box, and the vacuum heat insulating material is provided on both side surfaces, the top surface, the back surface, the bottom surface and the front surface. In a refrigerator in which the coverage rate of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area of the outer box, the heat radiation pipes arranged in the outer box are only the front opening of the refrigerator. The amount of heat absorbed into the refrigerator can be further reduced, and the energy saving effect can be further enhanced.

The invention according to claim 15 is the invention according to any one of claims 1 to 14, wherein a hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box. The ratio of the thickness of the vacuum heat insulating material to the thickness of the outer box thickness is set to 20 or more and 60 or less, so that the fluidity of the rigid urethane foam can be maintained while preventing the outer box from waviness and deformation. A composite heat insulating wall with a vacuum heat insulating material can be configured, and the volumetric efficiency of the inner volume with respect to the outer volume of the heat insulating box can be enhanced.

The invention according to claim 16 is the invention according to any one of claims 1 to 14, wherein the core material is inside the gas barrier film with respect to the thickness of the vacuum heat insulating material. Since the ratio of the length of the end sealing portion of the vacuum heat insulating material in which the gas sealing film is sealed is 0.5 to 2.0, the sealing reliability of the end sealing portion of the gas barrier film can be improved. It is possible to reduce the heat absorption from the end sealing portion to the inside of the refrigerator while ensuring.

Further, the invention according to claim 17 is the invention according to any one of claims 1 to 14, wherein the outer box is different from the length of the end sealing portion of the vacuum heat insulating material. Since the ratio of the wall thickness of the inner box to the wall thickness of the inner box is set to 2 or more and 5 or less, the heat absorption from the end sealing part of the vacuum heat insulating material to the inside of the refrigerator is properly ensured while ensuring the sealing reliability of the vacuum heat insulating material. It is possible to provide a refrigerator that can be reduced and has high reliability and excellent heat insulation performance.

According to the eighteenth aspect of the present invention, the vacuum heat insulating material is disposed on at least both side surfaces and the top surface of the outer box, and heat radiating pipes for the refrigeration cycle are provided on the both side surfaces and the top surface of the outer box by heat conduction. Fixing the heat radiating pipes to the outer box on the flat plate in advance, and attaching the vacuum heat insulating material to both side surfaces of the outer box before bending the outer box on the flat plate together with the heat radiating pipe into a U shape. Since it is a manufacturing method of a refrigerator in which the above vacuum heat insulating material is attached to the top surface after sticking and bending, it is possible to prevent the peeling of the vacuum heat insulating material due to the displacement of the heat radiation pipe when the outer box is bent, and the vacuum heat insulating material bonding process The property is improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a refrigerator according to a first embodiment of the present invention.

FIG. 2 is a front sectional view of the refrigerator according to the same embodiment.

FIG. 3 is an enlarged sectional view of a main part of a vacuum heat insulating material applied to the refrigerator according to the same embodiment.

FIG. 4 is an enlarged partial cross-sectional view of the refrigerator according to the same embodiment.

FIG. 5 is a front vertical sectional view of the refrigerator according to the second embodiment of the present invention.

FIG. 6 is a plan sectional view of a refrigerator according to a third embodiment of the present invention.

FIG. 7 is a partially enlarged view of the vicinity of the heat dissipation pipe of the refrigerator according to the same embodiment.

FIG. 8 is a partially enlarged view of the vicinity of the heat dissipation pipe of the refrigerator according to the fourth embodiment of the present invention.

FIG. 9 is a perspective view of an outer box flat plate of a refrigerator before being folded according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view of the refrigerator according to the embodiment after the outer box flat plate is bent.

FIG. 11 is a plan sectional view of a refrigerator according to a sixth embodiment of the present invention.

FIG. 12 is an enlarged sectional view of essential parts of a refrigerator according to a seventh embodiment of the present invention.

FIG. 13 is an enlarged sectional view of essential parts of a refrigerator according to an eighth embodiment of the present invention.

FIG. 14 is an enlarged cross-sectional view of a main part of a refrigerator according to a ninth embodiment of the present invention.

FIG. 15 is a cross-sectional view of a main part of a conventional refrigerator

[Explanation of symbols]

21 Refrigerator 22 Inner box 23 Outer box 24 Hard urethane foam 25 Insulation partition wall 26 Refrigerating room 27 Vegetable room 28, 29 Freezing room 30 Machine room 41, 42, 43, 44, 45, 46, 47, 48, 4
9, 50 Vacuum heat insulating material 53 Vapor deposition layer film 55 Aluminum vapor deposition film 57 Metal foil layer film 59 Aluminum foil 61, 69 Radiating pipe 63 Sealing material 64 Notch portion 66 Top surface 67 Side surface 70, 71 End sealing portion t1 Outer box Thickness t2, t4 Thickness of vacuum heat insulating material t3, t5 Length of end sealing part t6 Thickness of multi-layer heat insulating wall

Continued front page    (72) Inventor Shinichi Hashimoto             4-2-5 Takaidahondori, Higashi-Osaka City, Osaka Prefecture               Within Matsushita Cold Machinery Co., Ltd. (72) Inventor Akira Nakano             4-2-5 Takaidahondori, Higashi-Osaka City, Osaka Prefecture               Within Matsushita Cold Machinery Co., Ltd. (72) Inventor Masato Sasaki             4-2-5 Takaidahondori, Higashi-Osaka City, Osaka Prefecture               Within Matsushita Cold Machinery Co., Ltd. F term (reference) 3L102 JA01 KA01 LB01 LE01 MA01                       MA07 MB01 MB12 MB15 MB22                       MB24 MB27

Claims (18)

[Claims] 1. A hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is arranged on each side surface, the top surface, the back surface, the bottom surface, and the front surface of the outer box. In a refrigerator in which the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area and the machine room is arranged in the lower part, the vacuum heat insulating material is in contact with the outer box on both sides, the top surface, the back surface, and the front surface. A refrigerator characterized in that it is disposed, and a bottom surface and a surface constituting the machine room are disposed in contact with an inner box. 2. The refrigerator according to claim 1, wherein the inside of the refrigerator is divided into a refrigerating temperature zone and a freezing temperature zone by a heat insulating partition wall, and a vacuum heat insulating material is arranged on the heat insulating partition wall. 3. A hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the vacuum heat insulating material is arranged on each side surface, the top surface, the back surface, the bottom surface, and the front surface of the outer box. In a refrigerator in which the coverage of the vacuum heat insulating material with respect to the surface area is more than 50% and 80% or less, when a plurality of vacuum heat insulating materials are provided side by side on a single surface, the end face separation part is located in the heat insulating partition part. Refrigerator to do. 4. A hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the vacuum heat insulating material is arranged on each side surface, the top surface, the back surface, the bottom surface, and the front surface of the outer box. In a refrigerator in which the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area, when a plurality of vacuum heat insulating materials are provided side by side, the end face separation part should be located in the region of the refrigeration temperature zone. Characteristic refrigerator. 5. A hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the vacuum heat insulating material is arranged on each side surface, the top surface, the back surface, the bottom surface, and the front surface of the outer box. A refrigerator in which the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area, wherein the end surface of each vacuum heat insulating material is located at the joint for forming the outer box. 6. A hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the vacuum heat insulating material is arranged on each side surface, the top surface, the back surface, the bottom surface and the front surface of the outer box. In a refrigerator in which the coverage of the vacuum heat insulating material is more than 50% and 80% or less with respect to the surface area, one surface of the vacuum heat insulating material is an aluminum vapor deposition film and the other surface is a film having a metal foil. Refrigerator to do. 7. The refrigerator according to claim 6, wherein the film side of the vacuum heat insulating material having the metal foil is disposed in contact with the inner side of the outer box. 8. The refrigerator according to claim 1, further comprising a heat radiation pipe sandwiched between the outer box and the vacuum heat insulating material. 9. The refrigerator according to claim 8, wherein the heat radiation pipe has a flat cross section. 10. The refrigerator according to claim 8, wherein a sealing material is applied around the heat dissipation pipe. 11. A soft member is arranged between the heat radiation pipe and the vacuum heat insulating material, and the soft member is arranged.
Refrigerator described in. 12. The vacuum heat insulating material is provided with a cutout portion on the side of the end outer box, and a heat radiation pipe is arranged in the cutout portion. Refrigerator described in. 13. The refrigerator according to claim 8, wherein a vacuum heat insulating material is pressure-welded to the outer box at a rate of 200 to 800 N / cm 2 with a heat radiating pipe interposed therebetween. 14. A hard urethane foam and a vacuum heat insulating material are provided between an outer box and an inner box, and the vacuum heat insulating material is provided on both side surfaces, a top surface,
In the refrigerator which is arranged on each of the back surface, the bottom surface, and the front surface, and the coverage of the vacuum heat insulating material is more than 50% and less than 80% with respect to the surface area of the outer box, the heat radiating pipe to be installed in the outer box is the front surface of the refrigerator. A refrigerator characterized by having only an opening. 15. A hard urethane foam and a vacuum heat insulating material are provided between the outer box and the inner box, and the ratio of the thickness of the vacuum heat insulating material to the thickness of the outer box is set to 20 or more and 60 or less. The refrigerator according to claim 1, wherein the refrigerator is a refrigerator. 16. A ratio of the length of the end sealing portion of the vacuum heat insulating material, in which the core material is enclosed in the gas barrier film and the end portion is sealed, to the thickness dimension of the vacuum heat insulating material is 0.5. Above 2.
Claim 1 thru | or 14 characterized by having set it as 0 or less.
The refrigerator according to any one of 1. 17. The method according to claim 1, wherein the ratio of the wall thickness of the outer box to the wall thickness of the inner box is set to 2 or more and 5 or less with respect to the length of the end sealing portion of the vacuum heat insulating material. Item 15. The refrigerator according to any one of items 14. 18. A vacuum heat insulating material is disposed on at least both side surfaces and a top surface of an outer box, and heat radiating pipes for a refrigeration cycle are fixed to the both side surfaces and a top surface of the outer box in a heat conductive manner. Fixing the heat dissipation pipe to the outer box, attaching the vacuum heat insulating material to both side surfaces of the outer box before bending the outer box on the flat plate together with the heat releasing pipe into a U shape, and then bending the vacuum heat insulating material. A method for manufacturing a refrigerator, characterized in that the above is attached to the top surface.