WO2003089859A1

WO2003089859A1 - Refrigerator

Info

Publication number: WO2003089859A1
Application number: PCT/JP2003/005040
Authority: WO
Inventors: Hidetomo Takanishi; Hironori Imada; Masato Sasaki; Shinichi Hashimoto; Tsukasa Takushima; Kazuya Higami; Akira Nakano; Hiroshi Aoki; Muneto Yamada; Tsuyoshi Otsu; Kimihiro Nishiyama; Yuji Natsuhara; Toyoshi Kamisako
Original assignee: Matsushita Refrigeration Company
Priority date: 2002-04-22
Filing date: 2003-04-21
Publication date: 2003-10-30
Also published as: KR20040106377A; EP1505359A4; EP1505359A1; CN101025321A; CN100535562C; CN101025319A; CN1646868A; TW200400343A; KR100662530B1; AU2003235312A1; CN100498158C; TWI231356B

Abstract

A refrigerator having an attractive appearance and insulated efficiently, comprising an outer box, an inner box, and resin foam body and vacuum insulator (hereafter referred to as insulator) disposed therebetween, wherein the averaged roughness of the roughnesses of the surfaces of the outer box where the insulators are disposed at the centerlines of the outer surfaces of the outer box is set to 0.1 μm or coarser or the glossiness of the outer surface is set to 80 or below, the insulator is stuck on the inner plate of a door forming a front face, intercalated members for preventing the deformation of the outer surface of the outer box is disposed between the insulator and the outer box, radiating pipes are disposed between the insulator and the outer box and a space part between the insulator and the radiating pipes is allowed to communicate with the outside, small holes are provided in the surfaces of the outer box where the insulator is disposed, the insulator is disposed so as to come into contact with the outer box for both upper side faces, top face, rear face, and front face of the outer box and so as to come into contact with the inner box for the bottom face, both lower side faces, and a face forming a machine room provided at the lower part, and the insulator having the radiating pipes assembled on the surface thereof in contact with the outer box is disposed on the inside of the outer box.

Description

Description Refrigeration Technical Field

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

In recent years, with the aim of saving energy and space in refrigerators, the use of vacuum insulation materials with high insulation performance has been studied to enhance the insulation performance of refrigerators. The vacuum heat insulating material has heat insulation performance several times to about 10 times that of hard urethane foam which is a resin foam. Nowadays, the demand for energy saving is increasing, and it is urgently necessary to improve the heat insulation performance by maximizing the use of such vacuum insulation materials within an appropriate range. On the other hand, when vacuum insulation is applied to the heat insulation box of a refrigerator in a multi-layered form with rigid urethane foam, the appearance of the heat insulation box is deformed due to the difference in shrinkage between the hard urethane foam and the vacuum insulation. Japanese Utility Model Application Laid-Open No. 61-141690 discloses a method for solving such a problem. Hereinafter, the conventional refrigerator will be described with reference to the drawings.

FIG. 40 is a cross-sectional view of a door arranged at a front opening of a conventional refrigerator, and FIG. 41 is an enlarged view of a part of FIG. 40. In the figure, the refrigerator has a metal outer plate 1, a synthetic resin door frame 2, a synthetic resin inner box 3, foam insulation 4, and vacuum insulation 5. The release paper 6 inserted between the vacuum heat insulating material 5 and the outer plate 1 is formed larger than the vacuum heat insulating material 5. In this manner, the vacuum heat insulating material 5 is located on the inner surface of the outer plate 1 via the release paper 6. In such a configuration, the foam heat insulating material 4 shrinks after the foam heat insulating material 4 is foamed. The action creates a gap X between the outer plate 1 and the release paper 6, thereby preventing the outer plate 1 from being deformed.

However, in such a refrigerator, the apparent deformation of the outer panel is prevented. Although it can be stopped, a gap is created between the outer panel and the foam insulation. Therefore, when the user touches the hand, the tactile sensation due to the beveling of the outer plate is poor.

Japanese Patent Application Laid-Open No. 6-159922 also discloses a refrigerator having a vacuum heat insulating material. FIG. 42 shows a side sectional view of such a conventional refrigerator. The refrigerator body 7 includes an outer box 1A and an inner box 3. A moldable bag-shaped paper material 8 covers the entire space formed by the outer box 1A and the inner box 3, and the inside of the paper material 8 is filled with an inorganic porous filler 4A. Furthermore, a vacuum insulation material 5 is arranged along the shape of the space surrounded by the inner and outer boxes 1A and 3. Further, the vacuum heat insulating material 5 used has metal foil on both sides and has a flat shape only.

With this configuration, the vacuum heat insulating material 5 can be easily stored between the inner and outer boxes 1A and 3, and the work of closing the gap between the inner and outer boxes 1A and 3 and the vacuum heat insulating material 5 becomes unnecessary. Further, since the heat insulation box can be constituted only by the vacuum heat insulating material 5 without using the rigid urethane foam which is a resin foam, extremely high heat insulation performance can be secured.

However, such a refrigerator uses only the vacuum heat insulating material 5 which is inferior in strength as compared with the rigid urethane foam, so that the heat insulating performance is high but the strength is very weak. That is, it is easily deformed in appearance. In addition, since the shape of the inner and outer boxes is not planar, it is difficult to use a plate-shaped vacuum heat insulating material for a non-planar portion such as an uneven surface of a heat radiation pipe. In order to improve the heat insulation performance, it is effective to use a vacuum heat insulator using an aluminum vapor-deposited film on one plane, but it is difficult to use a vacuum heat insulator using an aluminum vapor-deposited film in terms of reliability. is there. Disclosure of the invention

A refrigerator provided with a resin foam and a vacuum heat insulator between an outer box and an inner box has one of the following configurations.

(1) The center line average roughness (Ra) of the outer surface of the outer case where the vacuum heat insulating material is disposed on the outer case is set to 0.1 lm or more. Or, on the outer surface of the outer box Gloss is 80 or less.

(2) Affix the vacuum insulation material to be installed on the door that constitutes the front surface to the inner plate of the door.

(3) An intervening member is provided between the vacuum heat insulating material and the outer case to prevent deformation of the outer surface of the outer case.

(4) Arrange the heat radiation pipe between the vacuum heat insulating material and the outer box, and connect the void formed by the vacuum heat insulating material and the heat radiation pipe to the outside.

(5) Provide pores in the outer box on the side where the vacuum heat insulating material is placed on the outer box.

(6) A machine room is provided at the bottom, and vacuum insulation is placed in contact with the outer box on both sides, top, back, and front of the refrigerator, forming a machine room on the bottom, both sides, and the bottom. It is arranged in contact with the inner box on the surface to be made.

(7) Vacuum insulation with a heat-dissipating pipe installed on the surface in contact with the outer box is placed inside the outer box. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view of the refrigerator of FIG.

FIG. 3 is a front sectional view of the refrigerator of FIG.

FIG. 4 is an exploded view of the refrigerator compartment door of the refrigerator according to the first embodiment of the present invention before foaming.

FIG. 5 is a cross-sectional view of FIG. 4 after foaming.

FIG. 6 is a cross-sectional view of the freezer compartment door of the refrigerator according to Embodiment 1 of the present invention.

FIG. 7 is an exploded view of another refrigerator compartment door before foaming in the refrigerator according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of FIG. 7 after foaming.

FIG. 9 is a cross-sectional view of a relevant part of a side wall of a refrigerator according to Embodiment 3 of the present invention.

FIG. 10 is a perspective view of a main part of a refrigerator according to Embodiment 3 of the present invention. FIG. 11 is a cross-sectional view of a relevant part of a side wall of a refrigerator according to Embodiment 4 of the present invention.

FIG. 12 is a cross-sectional view of a main part of a side wall of a refrigerator according to Embodiment 5 of the present invention.

FIG. 13 is a cross-sectional view of a vacuum heat insulating material used for a refrigerator according to Embodiment 6 of the present invention.

FIG. 14 is a cross-sectional view of another vacuum heat insulating material used for a refrigerator according to Embodiment 6 of the present invention.

FIG. 15 is a cross-sectional view of another vacuum heat insulating material used for a refrigerator according to Embodiment 6 of the present invention.

FIG. 16 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. 17 is a perspective view showing a state of the refrigerator according to Embodiment 7 of the present invention after the outer box is bent.

FIG. 18 is a cross-sectional view of main parts of a vacuum heat insulating material used for a refrigerator according to Embodiment 7 of the present invention.

FIG. 19 is a partially enlarged sectional view to which a vacuum heat insulating material used for a refrigerator according to Embodiment 7 of the present invention is applied.

FIG. 20 is an exploded perspective view of a main part of the other end of the aluminum tape after urethane injection and foaming of the refrigerator in the seventh embodiment of the present invention.

FIG. 21 is an enlarged cross-sectional view of a main part of a refrigerator according to Embodiment 8 of the present invention.

FIG. 22A is a side sectional view of a refrigerator in a ninth embodiment of the present invention.

FIG. 22B is an enlarged view of a main part in FIG. 22A.

FIG. 23A is a front sectional view of the refrigerator of FIG. 22A.

FIGS. 23B and 23C are enlarged views of the main parts in FIG. 23A.

FIG. 24 is an enlarged longitudinal sectional view of a main part of a vacuum heat insulating material applied to the refrigerator in the tenth embodiment of the present invention.

FIG. 25 is a partially enlarged cross-sectional view of the refrigerator according to Embodiment 10 of the present invention. FIG.

FIG. 26 is another partially enlarged cross-sectional view of the refrigerator in the tenth embodiment of the present invention.

FIG. 27 is an enlarged cross-sectional view of a main part of the refrigerator according to Embodiment 11 of the present invention.

FIG. 28 is a cross-sectional view of a main part of a refrigerator according to Embodiment 12 of the present invention.

FIG. 29 is a partially enlarged cross-sectional view near the heat radiating pipe of the refrigerator according to Embodiment 12 of the present invention.

FIG. 30 is a perspective view of an outer box flat plate of a refrigerator according to Embodiment 13 of the present invention before bending.

FIG. 31 is an enlarged cross-sectional view of a main part of a refrigerator according to Embodiment 14 of the present invention.

FIG. 32 is an enlarged cross-sectional view of a main part of the refrigerator according to Embodiment 15 of the present invention.

FIG. 33 is an enlarged cross-sectional view of a main part of a position where the vacuum heat insulating material is positioned on the outer case in the refrigerator according to Embodiment 16 of the present invention.

FIG. 34 is a configuration diagram of a vacuum heat insulating material applied to the refrigerator according to Embodiment 17 of the present invention.

FIG. 35 is a side sectional view of a refrigerator according to Embodiment 17 of the present invention.

FIG. 36 is a front sectional view of a refrigerator according to Embodiment 17 of the present invention.

FIG. 37 is a circuit diagram of a refrigeration cycle of a refrigerator according to Embodiment 18 of the present invention.

FIG. 38 is a structural diagram of a vacuum heat insulating material according to Embodiment 18 of the present invention.

FIG. 39 is a schematic diagram of the vacuum insulation material of FIG.

FIG. 40 is a cross-sectional view of a door arranged at a front opening of a conventional refrigerator. FIG. 41 is an enlarged view of part A of FIG.

FIG. 42 is a side sectional view of another conventional refrigerator. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that components having the same configuration are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1)

Embodiment 1 of the present invention will be described with reference to FIGS. The refrigerator 10 has a resin foam in a space formed by an inner box 11 made of a synthetic resin such as an acrylonitrile, butadiene, and styrene copolymer (ABS) and an outer box 12 made of a metal such as an iron plate. It is composed of a rigid urethane foam (urethane foam) 13 that is the body. A refrigerator compartment 15 and a vegetable compartment 16 are formed at the upper part of the heat insulating partition wall 14, and a switching compartment 17, an ice making compartment 18 and a freezing compartment 19 are formed at the lower portion. A compressor 21 is provided inside a machine room 20 located below the rear of the refrigerator 10. The refrigerator 10 also has a refrigerator 22 for cooling, a fan 23 for cooling, a refrigerator 24 for freezing, and a fan 25 for freezing. A condenser 26 is provided on the bottom of the refrigerator 10.

In the front opening of the refrigerator 10, hinged refrigerator compartment doors (hereinafter referred to as doors) 27, which pivot around one end, drawer-type vegetable compartment doors (hereinafter referred to as doors) 28, switching rooms Doors (hereinafter referred to as doors) 29, doors for ice making rooms (hereinafter referred to as doors) 30 and doors for freezer compartments (hereinafter referred to as doors) 31 are provided. The vacuum insulation materials 32, 33, 34, 35, 36, 37, 38, 39, 40, and 41 constitute the refrigerator body 10 together with the urethane foam 13.

The vacuum heat insulators 32, 33, 34, 36 are attached to the outer box 11 in contact with the top, back, side, and inside of the machine room components. Further, the vacuum heat insulating material 35 is attached in contact with the bottom surface of the inner box 12. The vacuum heat insulating material 37 is disposed in the heat insulating partition wall 14. Also, Inside the door 27, a vacuum heat insulating material 38 is provided so as to be in contact with the inner box. Inside the doors 28, 29, 31 are vacuum insulation materials 39, 40, 41, respectively, located so as to be located between the outer steel plate of each door and the inner box. Although not shown, a vacuum heat insulating material is also provided in a middle portion between the outer steel plate of the door 30 and the inner box.

The urethane foam 13 surrounding the freezing compartment 19 and the switching compartment 17 in the freezing area and the vacuum heat insulating materials 33, 34, 35, and 36 form an insulating box. The thickness of the heat insulating wall of the heat insulating box is preferably in the range of 25 to 5 Omm including the thin portion of the opening except for the door. On the other hand, the urethane foam 13 surrounding the refrigerator compartment 15 and the vegetable compartment 16 in the refrigeration area and the vacuum insulation materials 32, 33, and 34 also form an insulation box. The heat insulation wall thickness of the heat insulation box shall be in the range of 25 to 40 mm, including the thin part of the opening except for the door. Since a vacuum heat insulating material having a thickness of 10 to 15 mm is provided in the heat insulating wall thickness, the thickness of the urethane foam 13 to be filled is at least 10 mm. For this reason, it does not hinder the fluidity of the urethane foam 13 during foaming, and does not cause a decrease in heat insulation due to foam roughness or poor filling. In this way, the thickness of the vacuum heat insulating material is ensured, and the heat insulating property of the urethane form 13 is maintained while the heat insulating property of the urethane form 13 is sufficiently exhibited, so that the heat insulating performance of the multilayer heat insulating wall can be effectively improved. In particular, it is more effective in the freezing temperature area where the temperature gradient inside and outside the refrigerator is large. The thickness of the heat insulating wall surrounding the freezing room 19 and the switching room 17 in the freezing area should not exceed 50 mm. In this way, vacuum insulation can be applied to increase the internal volumes of the freezer compartment 19 and the switching compartment 17, which have relatively small volume ratios, without affecting the appearance layout. However, the utility value of the vacuum insulation material can be further enhanced. The thickness of the heat insulation wall of the refrigerator compartment 15 and the vegetable compartment 16 should not exceed 40 mm. As a result, in the refrigerated region where the temperature gradient inside and outside the refrigerator is relatively small, it is possible to balance the energy saving by applying vacuum heat insulating material and the effect of improving the internal volume efficiency inside and outside the heat insulating box. The refrigerator 10 has components that are not shown, and portions having a special structure such as an uneven shape, piping, and a drainage pipe installation portion. If a large amount of vacuum insulation is to be used to maximize the coverage, a special form of vacuum insulation suitable for such a part is required. Alternatively, the workability of attaching the vacuum insulation material becomes extremely poor. For this reason, even if it is attempted to arrange the vacuum heat insulating material so as to exceed 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. That is, the effect of improving the heat insulation performance with the introduction of the vacuum heat insulating material is significantly reduced.

Therefore, the effect of using a large amount of vacuum heat insulating material is not saturated by setting the coverage of the vacuum heat insulating material to the surface area of the outer box 11 to be 80% or less as in the present embodiment. . In other words, the endothermic load is effectively suppressed when the utility value is high, and the energy saving effect is enhanced.

The thickness of the heat insulating wall overlaps the peripheral part of each surface and the partition between the cooling chambers. At the periphery of the opening, the filling adhesion of the urethane foam 13 is reduced, and the heat insulating property is reduced. By taking these factors into account and avoiding inefficient coating of the vacuum insulation, even at a coverage of 70%, a heat insulation effect equivalent to 80% can be obtained.

In addition, when the coverage is 80%, a large-sized vacuum insulation material that can cover almost all of the sides, top, back, bottom, and front of the heat insulation box is provided. The bonding workability is improved.

For this reason, the use of non-standard forms of vacuum heat insulating material and the work of arranging it in areas where work efficiency is low can be avoided, and cost performance is improved. That is, the balance between the increase in the initial cost of the refrigerator 10 by applying the heat insulating box and the reduction in the running cost due to energy saving is not broken. Therefore, the value as life cycle cost can be increased.

The heat absorption load of the heat-insulating box can be improved by arranging the heat-insulating box at a location where the thermal gradient of heat passing inside and outside the inside of the heat-insulating box is large. The amount is effectively reduced, and the energy saving effect is increased.

From the viewpoint of investment efficiency, the contribution rate of the energy saving effect to the investment cost is large in the range of 50 to 70%.

For these reasons, the vacuum insulation is placed on both sides, top, back, bottom, and front of the refrigerator 10, so that the coverage of the vacuum insulation on the surface area of the outer box is 5%. It is preferably from 0% to 80%, more preferably from 50% to 70%.

In addition, for example, the temperature gradient inside and outside the refrigerator at the doors 27, 28, 29, 30 and 31 is relatively smaller than that of the other parts of the heat-insulating box, such as the machine room 20, where exhaust heat is involved. In addition, there is a need for strength against the storage inside the warehouse supported by each door and strength against mechanical peeling of the vacuum insulation material by opening and closing the door. From these facts, it may be possible to refrain from arranging the vacuum heat insulator on each door and to obtain the effect of applying the vacuum heat insulator efficiently in the other main body of the heat insulation box. At this time, the covering rate of the vacuum insulation material is about 53% in a refrigerator with a height of 180 mm, a width of 675 mm, and a depth of 6500 mm, which is reasonable for the above-mentioned paste area of 50 to 80%. Energy-saving refrigerator with typical vacuum insulation.

In addition, the center line average roughness (R a) of the outer surface of the outer box 11 on which the vacuum insulation materials 32, 33, and 34 are disposed on the outer box 11 is set to 0.1 m or more. It is set coarser than less than 0.1 zm.

The method of manufacturing the refrigerator compartment door 27 will be described with reference to FIGS. The door inner plate 42 has a projection 43, and a vacuum insulation material 38 is attached so as to be in contact with the surface of the frontmost portion 44. Then, after the urethane foam 13 is injected into the inside of the door outer plate 27A, the door inner plate 42 is covered and foamed to form the door 27.

FIG. 6 is a sectional view of a drawer-type freezer compartment door 31. The door inner plate 45 has a fixing portion 47 for fixing a rail 46 for supporting a case (not shown) for storing frozen food. Then, the urethane foam 13 is fixed together with the reinforcing plate 48 with the fixing portion 47 to fix the door inner plate 45 and the rail 46. The spacer 49 is provided with an adhesive or the like on a part of the reinforcing plate 48 so that the vacuum heat insulating material 41 is disposed in the space between the door inner plate 45 and the door outer plate 50. Fixed. 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 urethane foam 13 during foaming and the longitudinal direction of the spacer 49 match.

In the above configuration, a cooling device is constituted by the compressor 21, the refrigerator 22, the refrigerator 23, the refrigerator 24, the refrigerator 25, and the condenser 26. Such a cooling device is approximately 0 to 10 ° C in the refrigerator compartment 15 and the vegetable compartment 16, and is in the switching compartment 17, the ice making compartment 18 and the freezing compartment 19 --15 to --25 X: Cool to the temperature.

The vacuum heat insulating material is placed from the place with a large heat gradient inside and outside the box, and if the covering rate becomes 50% or more of the outer box surface area, the endothermic load of the refrigerator can be effectively suppressed. . This can increase the energy saving effect. By setting the coverage to 80% or less, the use of nonstandard vacuum insulating materials and the work of arranging them in areas with low work efficiency are avoided. In other words, 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 vacuum heat insulating material. Can be.

Since the vacuum insulation materials 3 2, 3, 3 and 3 4 are attached to the outer box 1 1, factors such as unevenness of the surface of the vacuum insulation materials 3 2, 3 3 and 3 4, and variations in flatness such as warpage etc. As a result, the outer surface of the outer case 11 may be deformed. However, since the center line average roughness (R a) of the outer surface of the outer case 11 is set to 0.1 m or more and is set to be coarser than the conventional product, the light of the outer case outer surface in the same coating material is used. Reflectivity decreases. This visually reduces the deformation of the outer surface of the outer box due to the attachment of the vacuum heat insulating material. 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 (R a) of the outer surface of the outer box 11 is desirably 1 m or less so as not to impair the quality of the external appearance. In addition, a vacuum insulation material 38 is attached so as to be in contact with the surface of the frontmost portion 4 4 of the door inner plate 4 2, and after injecting urethane foam 13, the door inner plate 4 2 is covered and foamed to make the door 2 7 Molding. Therefore, the vacuum insulation material 3 8 is a door

The outer surface of the refrigerator compartment door 27 does not deform due to shrinkage after urethane foam 13 foaming because it does not directly contact the outer surface of 27.

In addition, vacuum insulation material should be used so that it is in contact with the surface of the frontmost part 44 of the door inner plate 42.

Since 38 is attached, the vacuum heat insulating material 38 can be arranged as large as possible, and the heat insulating performance can be improved. In addition, door inner plate

Urethane foam 13 is also filled from the space between the vacuum heat insulating material 38 and the door inner plate 4 2 to the protrusion 43 formed inside the refrigerator of 42, and the strength of the protrusion 43 is increased.

Further, the vacuum heat insulating material 41 disposed on the door 31 is partially disposed in the space between the door inner plate 45 and the door outer plate 50 via the spacer 49. For this reason, the outer surface of the door outer plate 50 does not deform due to shrinkage after urethane foam 13 foaming. In addition, urethane foam 13 is securely formed near the fixed portion 47 of the rail 46 formed on the door inner plate 45 and the reinforcing plate 48, and the strength of the rail fixed portion 47 is increased.

Further, 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.

The spacer 49 has a substantially rectangular parallelepiped shape, and is arranged so that the flow direction of the foamed urethane foam 13 and the longitudinal direction of the spacer 49 are matched. Therefore, the spacer 49 weakens the flow of the urethane foam 13 at the time of foaming, the urethane filling property is improved, and the strength of the rail fixing portion 47 is reliably increased.

Although the refrigerator door 31 has been described as the drawer door of the refrigerator according to the present embodiment, it is effective that the vegetable room door 28 and the switching room door 29 constituting the drawer door have the same configuration. It is.

In the above description, a single vacuum heat insulator 38 is used for the refrigerator compartment door 27. However, as shown in Figs. 7 and 8, multiple doors A number of vacuum heat insulators 38 A, 38 B may be placed in contact with the door inner plate 42, with a gap near the protrusion 43. In this case, the projections 43 are more reliably filled with the urethane foam 13, and the strength of the projections 43 of the refrigerator compartment door 27B is increased.

(Embodiment 2)

The basic structure of the refrigerator according to the second embodiment of the present invention is the same as that of the first embodiment. In the first embodiment, the center line average roughness of the outer surface of the outer box 11 is specified. In the present embodiment, the outer box 1 2 on the side where the vacuum insulation materials 3 2, 3 3, 3 4 are arranged in the outer box 1 2 has its gloss reduced from about 90 in the past, 80 or less.

Here, the gloss refers to a reflectance of 10% at an incident angle of 60 degrees on a glass surface having a refractive index of 1.567, and a gloss of 100 or an incident angle of 20 degrees. In this case, the reflectance of 5% is defined as a glossiness of 100, which is defined in the JIS standard (JISZ8741).

As in the first embodiment, the vacuum heat insulating materials 32, 33, and 34 are attached to the outer case 12 in contact with them. For this reason, the outer surface of the outer box 12 may be deformed due to factors such as unevenness of the surface of the vacuum heat insulating materials 32, 33, and 34, and variations in flatness such as warpage. Since the outer surface of the outer case 12 has a gloss of 80 or less, the light reflectance of the outer surface of the outer case at the same surface roughness is reduced. Therefore, deformation of the outer surface of the outer box due to the attachment of the vacuum insulation material is visually reduced. Therefore, it is possible to cope with the external 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 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. 9 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. 10 is a perspective view of the main part. Other basic configurations are the same as in the first embodiment. In the figure, between the outer case 51 and the inner case 52, a soft member 53 as an interposition member for preventing deformation of the outer case outer surface from the outer case 51 side, a vacuum insulation material 54 and a hard material Urethane foam 55 is provided. The soft member 53 is larger than the vacuum heat insulator 54 and is preferably made of a member softer than the vacuum heat insulator 54. For example, a resin foam made of an independent foam is desirable.

The thickness t 1 of the soft member 53 is preferably equal to or greater than the flatness of the vacuum heat insulator 54 and equal to or less than the thickness of the vacuum heat insulator. Specifically, it should be 3 mm or more and 15 mm or less.

In the above configuration, the soft member 53 provided between the vacuum heat insulating material 54 and the outer case 51 prevents deformation of the outer surface of the outer case. Thereby, unevenness factors such as unevenness and warpage on the surface of the vacuum heat insulating material 54 are absorbed, and deformation of the outer surface of the outer box is prevented.

In addition, if the soft member 53 is larger than the vacuum heat insulating material 54, mounting variations when the vacuum heat insulating material 54 is attached to the outer box 51 will be absorbed, and work efficiency will be improved.

In addition, if the soft member 53 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, if the soft member 53 as the intervening member is a member made of a resin foam, the foaming pressure during foaming of the hard urethane foam (hereinafter, urethane foam) 13 is absorbed by the compression of the resin foam. In addition, the shrinkage of the urethane foam after foaming is absorbed by the expansion of the resin foam, and deformation of the outer surface of the outer box is reliably prevented.

In addition, if the soft member 53 is made of a closed-cell foam, gas such as foaming gas or air can be prevented from entering the inside of the soft member 53, thereby preventing the outer surface of the outer box from being deformed due to a temperature change. Is done.

Further, the thickness t 1 of the soft member 53 is set to be equal to or more than the flatness of the vacuum heat insulating material 54 and equal to or less than the thickness of the vacuum heat insulating material, specifically, 3 mm to 15 mm. This ensures that the flatness of the vacuum insulation material varies with the soft member. By not absorbing the soft member 53 more than necessary, the heat insulation performance does not decrease.

Even if the soft member 53 is pasted on the outer case 51 after the vacuum member 54 is pasted on the outer case 51, the soft member 53 is pasted on the vacuum case 54 before the soft member 53 is pasted on the outer case 51. You may.

(Embodiment 4)

FIG. 11 is a cross-sectional view of a relevant part of a side wall of a refrigerator according to Embodiment 4 of the present invention. The other basic configuration is the same as that of the first embodiment.

The hard member 56 as an intervening member provided between the vacuum heat insulating material 54 and the outer case 51 is made of a member harder than the vacuum heat insulating material 54. For example, it is preferably made of an ABS sheet, and the thickness thereof is preferably equal to or less than the flatness of the vacuum heat insulating material 54, specifically, 3 mm or less.

With the above configuration, the deformation factors of the outer case such as unevenness and warpage on the surface of the vacuum heat insulating material 54 are prevented from being transmitted to the outer surface of the outer case, and the outer surface of the outer case is prevented from being deformed. Further, since the thickness of the hard member 56 can be made relatively thin, the influence on the heat insulation performance can be suppressed.

(Embodiment 5)

FIG. 12 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 other basic configuration is the same as that of the first embodiment.

In the figure, a soft member 53 and a hard member 56 are disposed between a vacuum heat insulating material 54 and an outer box 51. The arrangement order is such that the hard member 56, the soft member 53, and the vacuum heat insulating material 54 are arranged from the outer box 51 side.

With the above configuration, the soft member 53 absorbs the deformation factors of the outer box such as unevenness and warpage on 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, Is reliably prevented from being deformed.

In addition, as the intervening members, the hard member 56, the soft member 53, and the vacuum heat insulating material 54 are arranged in this order from the outer box 51 side, so that the soft material 53 damages the outer material of the vacuum heat insulating material. Is prevented. (Embodiment 6)

FIGS. 13 to 15 are cross-sectional views of various vacuum heat insulating materials used in the refrigerator according to the sixth embodiment of the present invention. Other basic configurations are the same as in the first embodiment.

The core material 57 enclosed inside the vacuum heat insulating material is sealed around the core material 57 with a first outer cover material 58, and after the inside is evacuated, is kept in a vacuum state. The outer periphery of the first covering material 58 is covered with a second covering material 59 to form a double structure. In FIG. 13, gas is sealed in a space 60 between the first covering material 58 and the second covering material 59. Use air or inert gas as the gas.

As described above, the outer periphery of the first outer cover material 58 where the outer box deformation such as concave and convex, warp, etc. of the surface of the core material 57 enclosed inside the vacuum heat insulating material occurs, is formed by the second outer cover material 59 It is covered with a double structure. As a result, the outer casing material 59 absorbs the outer casing deformation factor, thereby preventing the outer casing outer surface from being deformed. In addition, a gas is sealed between the outer covering members 58 and 59 having the double structure. In this way, the gas space 60 filled between the double-layered outer casings 58, 59 absorbs the deformation factors of the outer casing, such as irregularities and warpage on the surface of the vacuum insulation material, and the outer casing outer surface Deformation is prevented.

Further, as shown in FIG. 14, the thickness t 3 of the double-layered outer cover material 59 B is made larger than the thickness t 2 of the other outer cover material 59 A, and the outer cover material 59 B side is removed. It may be pasted on Box 1 or 2. In this case, since the thickness t3 of the outer cover material 59B is increased, the thickness t3 absorbs factors such as unevenness and warpage on the surface of the vacuum insulation material, and the outer surface of the outer case is deformed. Is prevented.

Further, as shown in FIG. 15, the outer periphery of the first covering material 58 is covered with a second covering material 59 to form a double structure, and a soft member 6 1 May be enclosed. In this case, the soft member 61 absorbs the deformation factors of the outer box such as unevenness and warpage on the surface of the vacuum heat insulating material, and the outer surface of the outer box is prevented from being deformed. In addition, 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 Ί)

FIG. 16 is a plan view showing a state before bending the outer box of the refrigerator according to Embodiment 7 of the present invention, and FIG. 17 is a perspective view showing a state after bending the outer box of the refrigerator. Fig. 18 is a cross-sectional view of the main part of the vacuum insulation material used in the refrigerator, Fig. 19 is a partially enlarged cross-sectional view of the refrigerator using the vacuum insulation material, and Fig. 20 is the refrigerator after urethane injection and foaming. FIG. 4 is an exploded perspective view of a main part of the other end of the aluminum tape. Other basic configurations are the same as in the first embodiment.

The outer box 62 made of a steel plate is a flat plate before bending. The outer box 62 has a radiating pipe 63 constituting a refrigeration cycle fixed with an aluminum tape 64 as a fixing member, and a vacuum heat insulating material 65, 66, 67 on the upper surface thereof is an adhesive member such as a hot melt. Fixed at. Then, the outer box 62 is bent at the bending portion 69, and the rear plate 70, the bottom plate 71, and the inner box (not shown) are assembled. After that, the space defined by the outer box 62 and the inner box is filled with rigid urethane foam and foamed. Therefore, the machine room component 68, which houses the compressor of the refrigeration cycle, is not filled with urethane foam and communicates with the outside. Further, one end 64 の of the aluminum tape 64 fixing the heat radiating pipe 63 extends to the machine room constituent part 68. Also, the other end 6 4 の of the aluminum tape 64 is located inside the vacuum insulation material 6.5.

Further, after the vacuum heat insulating material 65 is completed, a groove 74 is formed by a press section 73 of a press machine 72. Then, the vacuum heat insulating material 65 is arranged and fixed to the outer box 62 such that the heat radiating pipe 63 enters the groove 74. When radiating the heat radiating pipe 63 between the outer case 62 and the vacuum heat insulating material 65, a first gap 76 is formed between the outer case 62 and the aluminum tape 64. A second void portion 77 is formed between the groove 6 4 and the groove 74 of the vacuum heat insulating material 65.

With the above configuration, one end 64 4 7 of the aluminum tape 64 extends to the machine room component 68 in the first gap portion 76 and the second gap portion 77. So it is in communication with the outside world. Therefore, gas such as foaming gas does not stay in the voids 76 and 77. Therefore, the gaps 76 and 77 do not expand or contract due to a change in the ambient temperature, and the outer surface of the outer box 62 where the heat radiating pipe 63 is disposed is prevented from being deformed.

In addition, one end 64 A of the aluminum tape 64 extends to the machine room component 68, and the other end 64 B is located inside the end of the vacuum heat insulating material 65. When the rigid urethane foam 75 is foamed, some urethane foam 75 penetrates through a gap between the vacuum heat insulating material 65 and the heat radiating pipe 63. However, as shown in FIG. 20, this configuration does not reach the other end 64 B of the aluminum tape 64. Therefore, since the air gaps 76 and 77 near the other end 64 B side of the aluminum tape 64 are in communication with each other, the gas in the air gaps 76 and 77 is smoothly discharged out of the refrigerator. As a result, the gap does not expand or contract due to a change in the ambient temperature, and the outer surface of the outer box 62 provided with the heat-dissipating pipe 63 is reliably prevented from being deformed.

Further, a groove 74 formed in the vacuum heat insulating material 65 opposite to the heat radiating pipe 63 is formed by a press portion 73 of a press machine 72 after the vacuum heat insulating material 65 is completed. Therefore, it is not necessary to form a groove in the core of the vacuum heat insulating material 65 in advance, and the manufacturing process of the vacuum heat insulating material can be simplified.

In the above description, the aluminum tape is described as the fixing member, but the material is not particularly limited as long as the tape material has adhesiveness. Further, it is more preferable to have thermal conductivity.

(Embodiment 8)

FIG. 21 is an enlarged sectional view of a main part of a refrigerator according to Embodiment 8 of the present invention. The other basic configuration is the same as that of the first embodiment. A plurality of pores 78 previously arranged on the outer surface of the outer box 62 by a press or the like are provided linearly on the outer box 62 in correspondence with the arrangement portion of the vacuum heat insulating material 65.

In the above configuration, the gas in the gap between the vacuum insulation material 65 and the outer case 62 is caused by the deformation of the outer case due to unevenness and warpage of the surface of the vacuum insulation material 65. Become. This gas is discharged smoothly out of the refrigerator through the pores 7 8. Therefore, the gap does not expand or contract due to a change in the ambient temperature, and the outer surface of the outer box 62 in which the vacuum heat insulating material 65 is provided is 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. 22A is a cross-sectional view showing a left-side portion viewed from the right side when the refrigerator according to the ninth embodiment of the present invention is cut left and right, and FIG. It is sectional drawing which shows the mode that the part was seen from the front.

The difference between the basic structure of the refrigerator according to the present embodiment and the first embodiment is the arrangement of the vacuum heat insulating material. In other words, vacuum insulation

3 2, 3 3 A 3 3 B and 3 4 are attached to the outer case 12 in contact with the top surface, the back surface, and the inside of the upper side surface, respectively. Further, the vacuum heat insulating materials 35, 34A, 36 are attached to the inner box 11 in contact with the bottom surface, the lower side surface, and the component surface of the machine room 20, respectively. The refrigerator compartment door 27, the vegetable compartment door 28, and the freezer compartment doors 29, 31 located at the front opening of the refrigerator 10 have vacuum insulation materials 38, 39, respectively. 4 0 and 4 1 are disposed so as to be in contact with the outer steel plate of each door.

According to the present embodiment, each vacuum heat insulating material is disposed from a place having a large passing heat gradient inside and outside the heat insulating box, and the heat absorption load is effectively suppressed in a state where the use value of the vacuum heat insulating material is high. Enhance energy saving effect.

In addition, each vacuum insulation material is placed on the outer box 12 on both sides, top, back, and front of the refrigerator, and the bottom and the surface that constitutes the machine room 20 are placed on the inner box 11. Has been established. Therefore, the vacuum heat insulating materials 35, 34A, 36, and 37 disposed in the lower side surfaces, the bottom surface, and the machine room 20, where the surface temperature of the outer box 12 becomes high, are not exposed to high temperatures. For this reason, the deterioration of the vacuum insulation performance over time can be minimized, and the long-term reliability of the vacuum insulation materials 35, 34A, 36, and 37 increases. In addition, since the vacuum heat insulating material 34 A on both sides of the lower part is disposed in contact with the inner case 11, a complicated fitting portion and piping between the outer cases 12 are avoided, and the vacuum heat insulating material 34 A is used. Damage is prevented. In other words, on the lower side surfaces where the shape of the outer box 12 is complicated, the reliability is improved by arranging the vacuum heat insulating material 34 A in contact with the inner box 11.

In addition, since the vacuum insulation material 32 on the top surface is placed in contact with the outer case 1 2, it is possible to attach the interior lighting fixtures or electric wires (not shown) to the top surface of the inner case 11. Becomes Therefore, it is possible to install lighting on the top surface of the refrigerator compartment 15, and the usability is improved.

In addition, by disposing vacuum insulation materials 33 A and 33 B on the back of the insulation box, these vacuum insulation materials drain the defrost water from the cooling system piping and coolers 22 and 24. It does not interfere with the drain tube (not shown). Also, the rear panel and the vacuum heat insulating materials 33A and 33B can be assembled as an integral product, which is preferable in the manufacturing process.

In addition, since each vacuum heat insulating material is disposed in contact with either the outer box 12 or the inner box 11 constituting the heat insulating box of the refrigerator, the rigid urethane foam 13 which is a resin foam is provided. A sufficient spatial distance to be formed can be secured. Therefore, the strength of the box body is maintained and the appearance is good without causing deterioration of the heat insulation performance due to the roughness of the urethane foam 13 or insufficient foaming.

The insulation wall thickness of the heat insulation box forming the freezer compartments 18 A and 19 in the freezing area, and the heat insulation wall thickness of the heat insulation box forming the refrigerator compartment 15 and the vegetable compartment 16 in the refrigeration area are the same as those in Embodiment 1. Description is omitted. The same applies to the coverage of the outer surface of the refrigerator 10.

The vacuum heat insulators 33A and 33B are provided on the rear panel in advance, and then the flat plate is bent into a U-shape and joined to the side and the top to form the outer box 12. At this time, it is preferable to dispose the vacuum heat insulating materials 33 A and 33 B so as to be located near the seam forming the outer box 12. That is, the vacuum heat insulating materials 33 A and 33 B are configured to have substantially the same size as the rear panel. This enhances the heat insulation performance. Further, it is preferable that each vacuum heat insulating material is placed in the outer box 12 or the inner box 11 in advance. By assembling the box in this way, the manufacture becomes easy.

Further, it is preferable that the vacuum heat insulating materials 35, 34A, 36, and 37 disposed in contact with the inner box 11 have a smaller projected area than the inner box 11. In other words, the vacuum heat insulators 35, 34, 34, 36, and 37 provided in contact with the inner box 11 are provided with the vacuum heat insulators 35, 34, 36, 37 in contact. It does not protrude from each side of the inner box 11.

In such a configuration, the urethane foam 13 is poured between the outer box 12 and the inner box 11 after the vacuum heat insulating materials 35, 34A, 36, 37 are arranged at predetermined positions. . In this case, no force is applied to the vacuum heat insulating material 35, 34A, 36, 37 arranged in the inner box 11 in the direction of peeling from the inner box 11. For this reason, it is possible to prevent the vacuum insulation materials 35, 34A, 36, and 37 from peeling off due to the inflow of the urethane foam 13. Furthermore, the vacuum insulation materials 35, 34A, 36, and 37 can be stably stuck, and the flowability of the urethane foam 13 is not hindered.

Also, on the surface of the inner box 11 where the vacuum insulation materials 35, 34A and 36 are disposed in contact with each other, a convex portion 11A surrounding the outer periphery of each vacuum insulation material as shown in Fig. 23B is provided. Alternatively, it is preferable to provide a recess 11B for accommodating each vacuum heat insulating material as shown in FIG. 23C. Each of the convex portion 11A and the concave portion 11B has a step portion which is in contact with the outer periphery of the vacuum heat insulating material. The step reduces the exposed area of the end face of each vacuum insulation.

Providing the steps in this manner facilitates positioning when attaching the vacuum heat insulating materials 35, 34A, 36, and prevents the vacuum heat insulating materials from being broken. Further, peeling of each vacuum insulation material due to inflow of urethane foam 13 is prevented. In addition, when the convex portion 11A is provided, the step between the inner box 11 and the vacuum heat insulating materials 35, 34A, 36 is reduced, and the flowability of the urethane foam 13 is not hindered. The provision of the recesses 11B facilitates the processing of the mold of the inner box 11. In addition, the step itself is an inner box 1 It is a reinforcement of 1, and it is easy to attach vacuum insulation materials 35, 34A, 36. When the vacuum heat insulator 36 is arranged below the cooling section 24, as shown in Fig. 22B, the heat insulator 36A is arranged at the lower part of the cooler 24 or the inner surface of the inner box 11. It is preferable to secure the shape. A predetermined inclined shape for defrost water treatment is formed on the upper surface of the heat insulating member 36A, and the lower surface is planar and closely adhered to the inner box 11. In addition, a hole is provided at the lowest part of the upper surface of the heat insulating member 36A, and a path for removing defrost water from this hole to the outside is provided.

Due to the heat insulating member 36 A, the surface of the inner box 11 located below the cooler 24 becomes flat, and the surface of the inner box 11 has no slope, so that the vacuum insulation material 36 can be efficiently attached. Can be. In addition, it is possible to prevent the vacuum heat insulating material 36 from peeling off due to the inflow of the urethane foam 13. Further, since the portion to which the vacuum heat insulating material 36 is applied is not an inclined shape but a flat surface, the side length is shortened, and the vacuum heat insulating material 36 can be made smaller. In addition, the shorter side length can reduce the heat absorption load in the refrigerator.

In the above description, the inner surface of the inner box 11 below the cooler 24 where the heat insulating member 36 A is disposed is a flat surface. However, the lower part of the cooler 24 in the inner box 11 may be an inclined surface, and the heat insulating member 36A may be arranged on the outer surface of the inner box 11 in that portion. In this case, the vacuum insulation material 36 is arranged in advance on the heat insulating member 36A, and the box can be assembled, so that the production is easy.

Further, as shown in FIG. 23A, it is preferable to provide an air vent hole 11 C of the urethane foam 13 on the inner surface of the inner box 11. With this configuration, a hole for venting air is not required on the back of the outer case 12, and the vacuum heat insulating material 33 A can be provided. Further, the outer box 12 has no air vent hole, so that the appearance can be kept beautiful. In addition, it can also be used as the back of the outer box of a refrigerator of another structure, and the number of parts and man-hours can be reduced.

Also, as shown in Fig. 23A, the boundary between the vacuum heat insulator 34 and the vacuum heat insulator 34A is formed by overlapping the vacuum heat insulator 34 and the vacuum heat insulator 34A. Is preferred. In the present embodiment, the position of the lower end of the vacuum heat insulating material 34 provided in contact with the outer box 12 on both upper sides of the refrigerator 10 is changed to the vacuum heat insulating material provided in contact with the inner box 1 1 of the lower both sides. It is lower than the upper end of 34 A. When the vacuum insulation materials 34, 34A are installed on both sides of the refrigerator 10, they may be shifted in the vertical direction. In addition, the dimensional accuracy of the vacuum insulation material 34, 34A may be low. Even in such a case, the vacuum heat insulating material exists on at least one of the outer box 12 and the inner box 11 on both sides of the refrigerator 10. For this reason, the heat insulating effect of the vacuum heat insulating materials 34 and 34 A is not impaired. Further, a stable flow can be achieved without obstructing the flow of the urethane foam 13.

The inner box 11 is preferably flat in the width direction so that the vacuum heat insulating materials 35 and 36 can be easily and effectively attached. In the present embodiment, vacuum heat insulators 35, 36 are arranged in contact with the outside of the bottom surface of the inner box 11 having a flat surface formed in the width direction of the refrigerator 10. With such a configuration, the area for attaching the vacuum heat insulating materials 35, 36 on the bottom surface of the inner box 11 can be enlarged, and at the same time, the area of the bottom surface can be reduced, so that the energy saving effect can be enhanced. Further, the adhesion of the vacuum heat insulating materials 35 and 36 is improved.

When installing the vacuum insulation materials 32, 33A, 33B, 35, 34, 34A, 36, 37, 38, 39, 40, 41, It is preferable to remove foreign matter from the surface to be stuck before sticking. In this embodiment, foreign matter on the surface in contact with each vacuum heat insulating material is removed before sticking these vacuum heat insulating materials. As a result, damage to the vacuum insulation materials due to foreign matter can be eliminated, and the reliability of the bonding process can be improved.

(Embodiment 10)

FIG. 24 is an enlarged longitudinal sectional view of a main part of the vacuum heat insulating material applied to the refrigerator of the present embodiment, and FIGS. 25 and 26 are partially sectional enlarged views of the refrigerator according to the embodiment. The basic configuration of the entire refrigerator is the same as in the first embodiment or the ninth embodiment. The vacuum heat insulating material 91 has a core material 92 inside. The core material 92 is made of an aggregate of inorganic fibers such as glass wool. After vacuum drying the core material 92, the vacuum insulation material 91 is inserted into the jacket material where the vapor deposition layer film 93 and the metal foil layer film 97 are laminated, and the inside is evacuated to open the opening. It is formed by sealing.

The vapor deposition layer film 93 is a composite plastic film in which an aluminum vapor deposition film 95 is sandwiched between a nylon film 94 and a high-density polyethylene film 96. The metal foil layer film 97 is a composite plastic film in which an aluminum foil 99 is sandwiched between a nylon film 98 and a high-density polyethylene film 100.

The sealing surface between the vapor deposition layer film 93 and the metal foil layer film 97 has a flat surface on the vapor deposition layer film 93 side, and the surface on the metal foil layer film 97 side is three-dimensionally configured. And the vapor deposition layer film 93 side is arranged in contact with the outer box 12 or the inner box 11. That is, in the vacuum heat insulating material 91, one plane requiring high heat insulation is constituted by the vapor deposition layer film 93 having the aluminum vapor deposition film 95. Further, the other surface requiring high gas barrier properties is constituted by a metal foil layer film 97 having a metal foil 99. Then, the sealing surfaces of both films 93, 97 are positioned on the same plane as the plane on the side of vapor deposition layer film 93. This configuration facilitates the treatment of fins on the sealing surface and improves reliability. This makes it possible to use vacuum insulation material 91 which has high heat resistance and excellent heat insulation performance.

Further, in the present embodiment, as shown in FIGS. 25 and 26, the flat surface of the vacuum heat insulating material 91 on the side of the vapor deposition layer 93 is in contact with the inner side of the outer box 12 or the outer side of the inner box 11. Arrange. As a result, the vacuum insulation material 91 having high reliability and excellent heat insulation performance can be effectively arranged, and the fins on the sealing surface need not be treated.

In addition, both sides of the inner box 11 and outer box 1 2 are so complex that the vacuum insulation material cannot be stuck or the vacuum insulation material has a metal foil film on both sides where the reliability of the vacuum insulation material is important. Use insulation. By using a metal foil film with high gas barrier properties on both sides of the vacuum insulation material, even if both surfaces of the vacuum insulation material are in contact with a complex shaped surface, highly reliable vacuum insulation material Can be used. Also, since both surfaces are made of the same material, cost can be reduced. Furthermore, since both surfaces are made of the same material, there is no need to worry about mistakenly attaching the vacuum heat insulating material to the outer box 1 2 or the inner box 1 1 when attaching to the outer box 1 2 or the inner box 1 1.

Here, the fiber diameter of the inorganic fiber aggregate constituting the core material 92 is in the range of 0.1 βm to 1.0 m, which is about 1/10 of the thermal conductivity of the rigid urethane foam 13. It is preferable to form a vacuum heat insulating material having thermal conductivity. Assuming that the thermal conductivity of the urethane foam 13 is 0.015 W / mK, the thermal conductivity of the vacuum heat insulating material 91 is 0.015 WZmK. Further, the thermal conductivity of the vacuum heat insulating material 91 may be set to 0.010 W / mK: to 0.030 W / mK by selecting the fiber diameter of the inorganic fiber aggregate. That is, the thermal conductivity of the urethane foam 13 may be in the range of 1 15 to 1/5. This is because when the thickness of the multi-layer insulation wall between the urethane foam 13 and the vacuum insulation material 91 is relatively small, the thickness of the vacuum insulation material 91 is made small so as not to impair the flowability of the urethane foam 13. Even so, the insulation performance of the multi-layer insulation wall is to be exhibited effectively. Furthermore, in order to achieve higher coverage, vacuum insulation is also installed in places where the wall thickness is relatively thin, so that the energy saving effect can be achieved as expected.

(Embodiment 11)

FIG. 27 is an enlarged cross-sectional view of a main part of the refrigerator according to Embodiment 11 of the present invention. Other configurations are the same as in the first embodiment.

In the figure, the outer cover material of the vacuum heat insulating material 79 is composed of a film 80 having an aluminum vapor deposition layer on one surface and a film 81 having an aluminum foil on the other surface. Then, the film 80 is attached to the outer box 62. Then, the seal portion 8 2 between the filer 80 and the film 8 1 Rigid urethane foam 75 Bent to the side.

In the above configuration, the film 80 having the aluminum vapor-deposited layer has a low thermal conductivity, but has a higher gas permeability than the film 81. The film 81 having an aluminum foil has a low gas permeability, but has a higher thermal conductivity than the film 80. Therefore, if the seal portion 82 is bent to the film 81 side where heat conduction is easy, that is, to the urethane foam 75 side, the heat transfer path to the outer box 62 along the film 81 becomes longer. . In addition, the distance between the seal portion 82 and the outer box 62 is increased. As a result, heat transfer to the outer box 62 side via the film is suppressed, and the heat insulating property is improved.

In the above description, a film having an aluminum vapor-deposited layer and a film having an aluminum metal foil have been described, but may be made of other metals.

Although the present embodiment has been described based on Embodiment 1, it can also be configured in combination with the features described in other embodiments. This may be combined with the features described in the following embodiments.

(Embodiment 12)

FIG. 28 is a cross-sectional view of a refrigerator according to Embodiment 12 of the present invention, and FIG. 29 is a partially enlarged view of the vicinity of a heat-radiating pipe of the refrigerator. The basic configuration other than these is the same as in Embodiment 1 or Embodiment 9.

The heat-dissipating pipe 101 as a condenser that forms part of the refrigeration cycle is placed in contact with the side or back of the outer box 12 and has an aluminum tape 102 that has better heat conduction from the upper surface. Fixed to 2. The aluminum tape 102 also serves as a sealing material. A vacuum heat insulating material 34 is provided so as to cover the heat radiating pipe 101. Aluminum tape 102 is provided outside the refrigerator. With such a configuration, the heat of the heat radiating pipe 101 is reliably insulated by the vacuum heat insulating material 34, and the heat absorption load into the refrigerator is effective. Reduce rate. Further, since the aluminum tape 102 is disposed outside the refrigerator, the air between the heat radiation pipe 101 and the outer box 12 can freely move outside the refrigerator. As a result, unevenness and waving of the surface of the outer box 12 due to heat shrinkage of the air are suppressed, and the beauty of the external appearance is maintained. Further, the work of attaching the heat-dissipating pipe 101 can be easily performed without worrying about the amount of air between the heat-dissipating pipe 101 and the outer box 12.

Further, it is preferable that the aluminum tape 102 be divided in the middle or provided with holes. Thereby, the air between the heat radiating pipe 101 and the vacuum heat insulating material 34 can also move freely outside the refrigerator. Therefore, unevenness and waving of the surface of the outer box 12 due to heat shrinkage of the air can be suppressed, and the beauty of the appearance can be maintained. Further, the work of attaching the heat radiating pipe 101 can be easily performed without concern for the amount of air between the heat radiating pipe 101 and the vacuum heat insulating material 34.

When the heat radiating pipe 101 is installed, it may be incorporated in the vacuum heat insulating material 34 in advance and installed in the outer box 12. In this case, the vacuum heat insulating material 34 in which the heat radiating pipe 101 is incorporated on the surface in contact with the outer box 12 is disposed inside the outer box 12. With this configuration, the heat radiating pipe 1 1 is fixed to the inside of the outer box 1 2 before the heat radiating pipe 101 is sandwiched between the outer box 1 2 and the vacuum heat insulator 34. The gap between 0 1 and the vacuum heat insulator 34 can be reduced. Therefore, unevenness and waving of the outer box 12 surface can be suppressed, and the appearance can be maintained beautifully. Further, the heat insulating effect of the vacuum heat insulating material 34 can be enhanced, and the energy saving effect can be enhanced. Further, since the heat radiating pipe 101 is previously arranged on the vacuum heat insulating material 34 and can be assembled, manufacturing becomes easy.

In the above configuration, since the heat radiation pipe 101 is attached between the outer box 12 and the vacuum heat insulator 34, the heat of the heat radiation pipe 101 is reliably insulated by the vacuum heat insulator 34. However, the heat absorption load in the refrigerator can be reduced efficiently. (Embodiment 13)

FIG. 30 is a perspective view of an outer box flat plate of a refrigerator according to Embodiment 13 of the present invention before bending. The other basic configuration is the same as in the first embodiment or the ninth embodiment.

The heat radiating pipe 101 is disposed in contact with the surface 107 serving as the side surface of the outer box 12, and the heat radiating pipe 61 is not disposed on the surface 106 serving as the top surface. In other words, the heat radiating pipe 101 is disposed inside the outer box 12 so as not to be located at the top of the refrigerator. With such a configuration, the heat of the heat radiation pipe 101 is reliably insulated by the vacuum heat insulating material 34, and the heat absorption load into the refrigerator is reduced. In addition, since the vacuum heat insulating material 34 has better heat insulation performance than the hard urethane foam 13, the amount of heat absorbed as a refrigerator is reduced, and it is possible to dispose the heat radiation pipe 101 on the top surface 106. Become. Therefore, the vacuum heat insulating material 32 can be easily attached to the top surface, and the effect of energy saving can be enhanced.

In addition, since the heat dissipation pipe 101 is not provided on the top surface 106, the shape of the heat dissipation pipe 101 is simplified, so that workability can be improved, man-hours can be reduced, and material costs can be reduced. Furthermore, since there is no heat radiation pipe 101 on the top surface 106, it can also be used as a heat radiation pipe of a refrigerator of another structure. (Embodiment 14)

FIG. 31 is an enlarged view of a main part of a refrigerator according to Embodiment 14 of the present invention. The other basic configuration is the same as in the first embodiment or the ninth embodiment.

The vacuum heat insulating material 34 is disposed in contact with the outer case 12, and there is no film sealing allowance for the vacuum heat insulating material 34 in the direction in which the urethane form 13 flows. In other words, the vacuum heat insulating material 34 is disposed between the outer case 12 and the inner case 11 so that the film allowance of the vacuum heat insulating material 34 is not positioned in the direction in which the urethane foam 13 flows. I do. With the above configuration, the vacuum heat insulating material 34 enables a stable flow without obstructing the flow of the urethane foam 13. Furthermore, the urethane foam 13 when injected between the outer box 12 and the inner box 11 is in a highly humid state, which prevents heat stress by not directly contacting the sealing margin of the film. No deterioration of vacuum insulation material 3 4 is prevented.

Further, the sealing algebra is reduced, and the vacuum heat insulating material 34 maintains a high gas barrier property.

(Embodiment 15)

FIG. 32 is a cross-sectional view of main parts of a refrigerator according to Embodiment 15 of the present invention. The other basic configuration is the same as that of the ninth embodiment.

Vacuum insulation material 34 A should be placed preferentially from the place where defrost water piping 1 1 2 and wiring (not shown) are present. That is, in the present embodiment, there is a foreign matter (defrost water pipe 72, wiring, etc.) between the outer box 12 and the inner box 11 that may obstruct the flow of the rigid urethane foam 13. Vacuum insulation material 3 4 A will be installed in the place. In this way, the heat absorption load of the refrigerator is effectively suppressed by the vacuum insulation material 34 A, and the effect of energy saving is enhanced. Insulation performance is ensured by arranging the vacuum insulation material 34A where there is a foreign material that may impair the flowability of the urethane foam 13.

Also, when installing the defrost water pipe 1 1 2, it is preferable to install it between the vacuum insulation 34 A and the outer box 12. By doing so, the defrosted water is kept warm by the vacuum heat insulating material 34 A, and the defrosted water is prevented from being cooled and frozen by the influence of the temperature in the freezer compartments 18 A, 19.

(Embodiment 16)

FIG. 33 is a cross-sectional view of a main part of a refrigerator according to Embodiment 16 of the present invention. The other basic configuration is the same as in the first embodiment or the ninth embodiment.

In the present embodiment, the protective member 113 for protecting the end face of the outer box 112 is also used as a positioning member for attaching the vacuum heat insulating material 34. That is, the outer box 1 2 is installed on the end face of the outer Positioning of the vacuum insulation material 3 4 is performed using the girder protection member 1 1 3. In this manner, the protective member 1 13 on the end face of the outer box 1 2 and the positioning member of the vacuum heat insulating material 34 are shared. This prevents the vacuum insulation material 34 from being damaged during assembly. Further, the positioning at the time of attaching the vacuum heat insulating material 34 becomes easy, and workability is improved.

In addition, the protection member 113 may be provided on the top plate to protect the end surface of the vacuum heat insulating material 32, and may also be used as a positioning member at the time of assembly.

(Embodiment 17)

FIG. 34 shows a configuration diagram of a vacuum heat insulating material applied to the refrigerator according to Embodiment 17 of the present invention. Unlike the core material 92 of the tenth embodiment, the core material 121 is made of an inorganic fiber aggregate formed into a plate shape with a binder. The constituent material of the inorganic fiber aggregate is not particularly limited, and inorganic fiber such as glass wool, ceramic fiber, rock wool, or the like is formed into a plate shape using an organic or inorganic binder.

The gas barrier film 122 is formed in a bag shape at the seal portion 123. The gas barrier film 1 2 2 keeps the inside airtight. The material composition is not particularly limited. For example, it has the same configuration as the vapor deposition film 93 and the metal foil layer film 97 of the tenth embodiment. That is, one is a plastic laminate film made of polyethylene terephthalate resin on the outermost layer, aluminum foil on the middle layer, and high-density polyethylene resin on the innermost layer. The other is, for example, a plastic laminate film made of a polyethylene terephthalate resin in the outermost layer, an ethylene-vinyl alcohol copolymer resin having an aluminum deposited layer in the intermediate layer, and a high-density polyethylene resin in the innermost layer. These are formed into a bag shape.

As a method of manufacturing the vacuum insulation material, insert the core material into a bag-shaped gas barrier film 122, evacuate the inside, seal the opening with a welding seal 124, and maintain the vacuum inside. Let it.

FIGS. 35 and 36 are side sectional views of the refrigerator according to the present embodiment, respectively. It is a figure and front sectional drawing. The basic configuration is the same as that of the ninth embodiment, but the vacuum heat insulating material 34 arranged inside the outer box on the side in FIG. 36 is extended to the refrigeration area. Also, instead of the vacuum insulation material 34 arranged outside the inner box on the side, the vacuum insulation material 3 arranged in contact with the lower inner box 1 1 corresponding to the freezer compartment 19 of the OA instead of the 4A Has 4B. Then, the vacuum heat insulating material 34 and the vacuum heat insulating material 34 B are arranged such that the opposed end face separation portions are located near the upper end face of the machine room 20. The lower end of the vacuum heat insulator 34 is located below the upper end of the vacuum heat insulator 34B. Even with this configuration, the heat insulating effect on the side surface is exhibited as in the ninth embodiment. That is, the position where the lower end of the vacuum heat insulating material 34 and the upper end of the vacuum heat insulating material arranged outside the inner box on the side surface are not limited. In addition, the vacuum heat insulating materials 34 and 34 B are provided in a heat insulating part that separates the inside of the refrigerator from the machine room 20 that houses the compressor 21. The inside of the refrigerator has a freezer compartment 19 at 20 and the machine compartment 20 has 40 to 50. That is, the vacuum heat insulating materials 34 and 34 B efficiently insulate the thick wall portion between the machine room 20 and the freezer room 19 where the temperature difference is relatively large. Furthermore, when injecting the rigid urethane form 13 into the heat insulating box 1OA, generally, the front opening of the heat insulating box 1OA is generally arranged below. Then, the undiluted solution of urethane foam 13 is injected from two urethane injection ports provided substantially at the center in the height direction on the back and right and left of the heat insulating box 1OA. The flow of the urethane foam 13 foamed in this manner spreads in a fan shape centering on the point immediately below the two urethane inlets described above. The final destination of the urethane foam 13 is the top and bottom of the heat insulation box 1OA and the machine room 20 component plane. In the present embodiment, a vacuum heat insulator 36 having a high degree of flatness is arranged on the mechanical chamber 20 constituting surface which is the final arrival point of the urethane foam 13. For this reason, the space dimension near the final arrival point of the urethane foam 13 can be reliably ensured, the filling property of the urethane foam 13 is increased, and a predetermined heat insulation performance can be secured.

The thickness of the heat insulating wall of the heat insulating box 1OA and the covering ratio to the outer surface of the refrigerator 10 are the same as those in the first embodiment, and therefore description thereof is omitted. Vacuum insulation material 3 2, 3, 3, 34, 34 B, 35, 36, 37, 38, 39, 40, and 41 are combined with core material 1 2 1 as described above. The inorganic fiber aggregate formed into a flat plate with the material is covered with a gas barrier film 122 and the inside is evacuated and evacuated. The heat insulation box 1 OA is formed together with the urethane foam 13.

The vacuum heat insulating material shown in FIG. 34 may be applied to other embodiments.

In addition, the vacuum heat insulating materials 34 B, 35 and 36 may be obtained by molding the core material 121 with a binder in advance according to the shape of the surface in contact with the inner box 11. By forming in such a manner, a space layer (a point) is not generated on the contact surface between the inner box 11 and the vacuum heat insulating materials 34B, 35, 36. Therefore, the inner box 11 is prevented from waving and the like, and the appearance quality can be improved.

Vacuum insulation materials 32, 33, 34, 34 B, 35, 36, 37, 38, 39, 40, and 41 are Japanese Industrial Standards JIS—K 7 2 2 1 In the test method based on the above, it is preferable that the flexural modulus is 40 to 64 MPa. Flexural modulus is the ratio of the bending stress within the bending proportional limit to the corresponding strain. In addition, since the flexural modulus of the urethane foam 13 is about 8 MPa, the flexural modulus of the vacuum heat insulating material is preferably 5 to 8 times the flexural modulus.

Table 1 shows the strength test results of the insulation box using vacuum insulation materials with different flexural modulus. The test method is to measure the amount of displacement in the horizontal left and right direction at the top of the side surface of the heat insulation box 10 A when a food load of about 3 O kg is applied to the refrigerator compartment door 27. Sample A Sample B Sample C Insulated box specification Hard urethane Vacuum insulation material Vacuum insulation material

Foam only + Hardware + Hardware

Tan foam tan foam vacuum insulation

20 MPa 40 MPa Flexural modulus

Insulated box side deformation 3 mm 4 mm 3 mm From the above results, the strength of the heat-insulated box 1 OA is the strength of the rigid urethane foam only (A) when the rigid urethane foam and the vacuum heat insulating material with a flexural modulus up to about 40 MPa are multi-layered. Less than or equal to This is because the bending strength decreases as the heat insulation wall changes from a single structure to a multi-layer structure. By using a vacuum heat insulating material with a flexural modulus of 40 MPa or more, a multi-layer structure with a strength higher than that of the rigid urethane foam alone can be obtained. Since the flexural modulus of rigid urethane foam is 8 MPa, by setting the flexural modulus of the vacuum heat insulating material to at least 5 times that of rigid urethane foam, the strength of the multi-layered insulation box becomes equal to or higher.

In order to increase the bending strength of the vacuum heat insulating material, it is realized by selecting the material of the binder or increasing the amount of the binder used when forming the inorganic fiber aggregate of the core material 122 into a plate shape. These increase the cost during manufacturing. Therefore, the bending elastic modulus of the vacuum insulation material is about 64 MPa, which is the upper limit in terms of cost performance. In other words, by setting the bending elastic modulus of the vacuum heat insulating material to be 5 times or more and 8 times or less that of the hard urethane foam, the strength of the multilayer insulation box can be made equal to or more than that while satisfying the cost performance. it can.

As described above, the vacuum heat insulating material having such bending strength is obtained by covering the inorganic fiber aggregate in which the core material 121 is formed into a plate shape with the binder with the gas barrier film 122 and evacuating the inside. Manufactured. Compared to the vacuum insulation material using only the inorganic fiber aggregate as the core material, the pressure resistance, bending strength and flatness of the vacuum insulation material are increased by bonding and forming the inorganic fiber aggregate with the binder. Therefore, when such a vacuum heat insulating material is used, the strength of the heat insulating box 10 A increases. In addition, it is possible to incorporate the heat insulating box 1OA into the inside of the heat insulating box 1OA with a high degree of flatness, so that the dimensions of the space through which the urethane foam 13 formed inside the heat insulating box 1OA flows can be ensured. Thereby, the fluidity at the time of injecting the urethane foam 13 is increased, the filling rate of the urethane foam 13 is improved, and a predetermined heat insulation performance is obtained.

In addition, vacuum insulation materials 32, 33, 34, 34B, 35, 36, 37, By increasing the flatness of 38, 39, 40, and 41, it is possible to eliminate the space between the flat surface and the surface that is in direct contact with the adhesive. As a result, the adhesion to the bonding surface is enhanced, and the vacuum insulation material is prevented from falling off and falling during manufacturing and assembly, leading to improved reliability and improved workability. Further, by increasing the flatness of these vacuum heat insulating materials, the flatness of the heat-insulating box 1OA on the surface in direct contact also increases, and the appearance quality of the refrigerator 10 increases.

Also, by increasing the strength of the vacuum insulation material, disposal after use of the refrigerator * The vacuum insulation material can be easily taken out during dismantling and the recyclability is improved.

In addition, vacuum insulation materials 32, 33, 34, 34 B, 35, 36, 37, 38, 39, 40, 41 are used for inner box 1 1 or outer box 12 or door. When the adhesive is fixed to the outer panel of the body, it is preferable to apply the adhesive to the entire surface with a roller. As the adhesive, for example, a hot melt made of a rubber material is used.

Table 2 shows the results of the bonding strength test between the vacuum insulation material and the outer box 12 when the adhesive specification was changed. As a test method, in accordance with Japanese Industrial Standards JIS-Z0237-8, this test determines the 180 degree peeling adhesive strength to a test plate set to a width of 25 mm.

Table 2

The adhesive used was a rubber-based hot melt, and the test substrate used was a laminate of polyethylene terephthalate and stainless steel. The thickness of the adhesive applied is 30 ^ m, the pressure at the time of bonding is 2 kg, and the roller is cycled once. The test ambient temperature is 23 ° C.

From the results in Table 2, the adhesive strength is approximately doubled by applying the entire surface, compared to Sample E in which the adhesive is applied linearly at regular intervals, which is a commonly used method. In this way, the vacuum insulation materials 3 2, 3, 3, 34, 34 B, 35, 36, 37, 38, 39, 40, and 41 fall off and fall in the manufacturing process. do not do. In addition, the strength of the heat insulating box 1OA is increased by firmly bonding and fixing these vacuum heat insulating materials to the inner box 11 or the outer box 12. Also, by applying the adhesive on the entire surface, no space is created on the bonding surface between each vacuum insulation material and the inner box 1 1 or the outer box 1 2, and the insulation box 1 OA of the refrigerator 10 does not have waving, and The quality can be improved.

Further, the vacuum heat insulating materials 32, 33, 34, 38, 39, 40, 41 are arranged in contact with the outer box 12. A vacuum insulator having a high degree of flatness is provided on the outer box 1 2 that forms a plane as described above, and an adhesive is applied to the contact surface to form a space layer on the contact surface between the outer box 1 2 and the vacuum insulator. (Void) does not occur. This prevents the outer box 12 from waving, etc., and improves the appearance quality.

Also, by arranging the vacuum heat insulating materials 34 B, 35 and 36 in contact with the inner box 11, the condensation of the foaming agent of the urethane foam 13 located on the outer box 12 side is suppressed, and the heat insulation is achieved. The heat insulation performance of the wall increases.

In addition, the vacuum heat insulating materials 33, 35, 34, 34B and 36 are provided inside the heat insulating wall corresponding to the freezing temperature range. Thereby, the heat insulating performance of the heat insulating box 1OA corresponding to the freezing temperature zone having a relatively large temperature difference from the outside of the refrigerator can be efficiently increased.

In addition, in the heat-insulating wall part where the temperature difference of the heat-insulating box 10 A is large, it is necessary to secure the space for the polyurethane foam 13 and to ensure the maximum thickness of the vacuum heat-insulating material. It is important to increase the heat insulation performance while securing the internal volume of 0 A. In the present embodiment, the vacuum heat insulating material 33, 35, 34, 34B, 36 has a high flatness because the core material 122 is made of an inorganic fiber aggregate formed into a flat shape by a binder. Have. Therefore, in the heat insulation walls of the freezer compartments 18 A and 19 where there is a large temperature difference, the vacuum insulation material 33, 35, 34, 34 is required, while ensuring the dimensions of the space where the urethane foam 13 flows. The maximum thickness of B and 36 can be secured. Therefore, it is possible to provide a refrigerator with high insulation performance. You.

In addition, the vacuum insulation materials 38, 39, 40, 41 are arranged on the outer plate side inside the heat insulation walls constituting the doors 27, 28, 29, 30 provided at the opening on the front of the refrigerator. Has been established. In this way, by providing the vacuum insulators 38, 39, 40, 41 with high flatness on the outer plate forming the doors 27, 28, 29, 30 in this way, There is no space layer (void) on the contact surface between the outer plate and each vacuum insulation material. Therefore, the waving of the outer box 12 and the like are prevented, and the appearance quality is enhanced.

In the present embodiment, a hydrocarbon, for example, cyclopentane, is used as a foaming agent for urethane foam 13. This leads to protection of the global environment and prevention of global warming compared to conventional foaming agents. Further, since the vacuum heat insulating material is made of a non-flammable inorganic fiber aggregate, the safety is high even when a flammable hydrocarbon foaming agent is used. In addition, the heat insulation performance of the heat insulation box is enhanced by compensating for the deterioration of the heat insulation performance due to the application of the hydrocarbon foaming agent with the high heat insulation performance of the vacuum insulation material.

Further, in the present embodiment, the refrigerant of the refrigeration cycle including the compressor 21, the condenser 26, the refrigeration cooler 22, and the refrigeration cooler 24 is a hydrocarbon which is a flammable natural refrigerant, for example, Isobutane is used. This leads to protection of the global environment and prevention of global warming compared to conventional CFC-based refrigerants. In addition, since the vacuum heat insulating material is made of a non-combustible inorganic fiber aggregate, the safety is high even when a hydrocarbon as a combustible refrigerant is used.

In the refrigerator of the present embodiment, the vacuum heat insulating material is fixed in contact with the inner box 11 or the outer box 12 or the outer plate of each door, and foams the foam foam 13 in the space. It was explained as. However, as in the first embodiment, the vacuum heat insulating material may be disposed in the middle of the inner box 11 and the outer box 12 and the urethane foam 13 may be foamed in the space. In this case, the core material 122 of the vacuum heat insulating material is made of an inorganic fiber aggregate formed into a plate shape with a binder, and the vacuum heat insulating material has a high flatness. As a result, the space between the inner box 1 1 or outer box 1 2 and the vacuum insulation material can be secured with high accuracy. Urethane foam 13 is reliably filled. Further, since the inner box 1 1 and the outer box 1 2 do not come into direct contact with each other, the appearance of the insulated box 1 OA is not impaired. Further, by disposing the vacuum heat insulating material in the intermediate portion between the inner box 11 and the outer box 12 and forming the periphery with urethane foam 13, there is no need to fix the vacuum heat insulating material with an adhesive or the like.

Further, a vacuum insulation material in which the core material 121 is formed in an L-shape with a binding material in advance may be arranged in the top and side corners of the refrigerator 10. In this case, it is possible to further increase the coverage of the heat insulating box body 10 A with the vacuum heat insulating material. In addition, by arranging a vacuum heat-insulating material having high bending strength at the corner of the heat-insulating box 10A, the strength of the heat-insulating box 10OA can be efficiently increased.

Further, in the present embodiment, the vacuum heat insulators 38, 39, 40, 41 provided inside the doors 27, 28, 29, 30 disposed at the front opening of the refrigerator 10 are provided. Has been described as being in contact with the outer plate of each door. However, as in the first embodiment, the vacuum insulation materials 38, 39, 40, 41 are arranged in the middle part of the inner box and the outer plate of each door, and the space is filled with urethane foam 13. You may. In this case, since the vacuum heating materials 38, 39, 40, and 41 have high flatness, the dimensions of the space filled with the urethane foam 13 can be ensured, and the urethane foam 1 3 is filled securely. Since the outer panel does not directly contact the vacuum insulation materials 38, 39, 40, 41, deformation of the outer panel surface of each door can be further suppressed.

(Embodiment 18)

FIG. 37 shows a refrigeration cycle circuit diagram of the refrigerator in Embodiment 18 of the present invention. Other configurations are the same as in the first embodiment. This will be described below with reference to FIGS. 37 and 2.

A refrigerant discharge port 1338A of the compressor 1338 is connected via a condenser 1339 to an inlet of a three-way switching valve 140 which is a flow path switching unit. One outlet of the switching valve 140 is connected to the inlet of a freezer evaporator (hereinafter referred to as an evaporator) 136 via a freezer cavity 141. Evaporator 1 The outlet of 36 is connected to the inlet of non-return valve 144 via AKUMURAI 142. The outlet of the check valve 143 is connected to the refrigerant inlet 138 B of the compressor 138. The other outlet of the switching valve 140 is connected to the inlet of a refrigerator evaporator (hereinafter referred to as an evaporator) 134 through a refrigerator 134. The outlet of the evaporator 1 3 4 is the check valve 1

4 Connected to 3 outlets. In other words, the evaporator 13 4 and the evaporator 13 6 are connected in parallel to the compressor 13 8, and the outlet of the evaporator 13 36 is connected through the check valve 14 3 to the evaporator 13 4 Is connected to the exit. The outline of the operation of the above configuration and its effect will be described below. First, while the compressor 1338 is driven, the refrigerant flow path is switched by the switching valve 140 so that the refrigerant discharged from the compressor 1338 flows to the refrigerator evaporator 134. That is, a state shown by a broken arrow 150 in FIG. 37 is set. Hereinafter, this state is referred to as a refrigeration mode. In the refrigeration mode, the refrigerant discharged from the compressor 1338 performs a known state change, and is then sent to the evaporator 134 to cool the air around the evaporator 134. The evaporator 1 34 in FIG. 37 corresponds to the cooler 22 in FIG. At this time, the air cooled by the evaporator 13 4 is sent to the refrigeration room 15 and the vegetable room 16 by the blowing operation of the refrigeration fan 23, and the refrigeration room 15 and the vegetable room 16 are Cooled.

In addition, the refrigerant flow is switched by the switching valve 140 so that the refrigerant discharged from the compressor 1338 flows to the evaporator 1336 while the compressor 1338 is driven. That is, the state shown by the solid arrow 15 1 in FIG. 37 is set. Hereinafter, this state is referred to as a freezing mode. In the refrigeration mode, the refrigerant discharged from the compressor 1338 undergoes a known state change, and is then sent to the evaporator 136 to cool the air around the evaporator 136. The evaporator 1 36 in FIG. 37 corresponds to the cooler 24 in FIG. At this time, the air cooled by the evaporator 13 36 is sent to the switching room 17, the ice making room 18, and the freezing room 19 by the blowing action of the freezing blower 25.

Thus, the refrigeration temperature zone space consisting of the refrigeration compartment 15 and the vegetable compartment 16, and the freezing temperature zone consisting of the switching room 17, the ice making compartment 18, and the freezing compartment 19 The space and each are cooled independently. For this reason, the evaporator 14 maintains the cooling temperature of about 15: 1, and the evaporator 16 maintains the cooling temperature of about -25, thereby efficiently providing the inside temperature suitable for each cooling space. Therefore, the energy saving effect is enhanced. In addition, since the refrigerated temperature zone space and the frozen temperature zone space are independently cooled in a time-sharing manner, the amount of heat to be removed at one time is reduced. For this reason, the heat radiation of the condenser 139 is also reduced. As a result, the piping volume of the entire refrigeration cycle circuit is reduced to some extent. Therefore, when a flammable hydrocarbon-based natural refrigerant is used as the refrigerant, the risk of ignition at the time of refrigerant leakage is suppressed to some extent.

Further, when stopping the compressor 18 in a state where both the refrigerated temperature zone space and the frozen temperature zone space are cooled to a preset temperature, the compressor 13 38 is stopped in the refrigerated mode. In the refrigeration mode, the refrigerant discharge port 138 A of the compressor 13 8 communicates with the inlet of the evaporator 13 4 by the action of the switching valve 14 0, and the refrigerant discharge port 13 8 There is a cutoff between A and the inlet of the evaporator 1 36. When the compressor 1338 is stopped in this state, the high-temperature refrigerant does not flow into the evaporator 1336 from the high pressure side represented by the condenser 1339. Further, the refrigerant does not flow backward from the evaporator 134 to the evaporator 136 due to the operation of the check valve 144. Therefore, the low-temperature refrigerant is held in the evaporator 136, and the temperature of the evaporator 136 is prevented from rising unnecessarily. As a result, the energy loss of the refrigeration cycle is further reduced, and one effect of energy saving is further enhanced.

In general, R134a is used as a refrigerant in a conventional refrigerator. On the other hand, in the refrigerator of the present embodiment, as in Embodiment 17, R600a isobutane can be used as a hydrocarbon-based natural refrigerant.

With the above configuration, the heat absorption of the refrigerator as a whole is significantly greater than when the refrigerator 10 and the doors 27, 28, 29, 30 and 31 are insulated with only the rigid urethane foam 13. Reduced. As a result, an energy saving effect can be obtained by reducing the heat absorption of the box. In addition, a parallel switching system Even when the refrigeration temperature zone space and the freezing temperature zone space are alternately cooled by the system, the temporal temperature fluctuation in the stop side storage becomes small. In other words, the parallel switching system enhances cooling efficiency and energy saving effect, and at the same time, improves freshness of food.

In addition, by reducing the heat absorption of the box by using vacuum heat insulating material, the amount of heat that needs to be removed at once and the amount of heat radiation corresponding to it can be reduced compared to the case where the box is insulated with only rigid urethane foam. Become. Therefore, the piping volume is reduced. In addition, in the conventional heat-insulating box made of rigid polyurethane foam, a heat radiation system pipe (not shown) constituting a part of the condenser 1339 is embedded in the rigid polyurethane foam in order to prevent dew condensation on the refrigerator surface. I have. In the present embodiment, the use of a vacuum heat insulating material in a portion where dew condensation may occur eliminates the need for a heat-dissipating piping designed to prevent dew condensation. Therefore, the piping volume is greatly reduced as a whole. As a result, the amount of refrigerant required for cooling is greatly reduced, and in the case where a flammable hydrocarbon-based natural refrigerant is used, even if the refrigerant leaks, the risk of ignition becomes extremely low. The above-mentioned effect can be obtained even when the compressor 1338 is of a constant rotation speed type.However, it is possible to configure a cooling / refrigeration cycle by using a compressor 1338 of a variable rotation speed type. preferable. With this configuration, the difference between the static heat absorption load when the box is stabilized by using vacuum insulation and the maximum load when the door is opened or closed and the food load is loaded into the refrigerator is determined by the compressor rotation. It can be controlled by number. In a constant-speed compressor, it is necessary to secure an excessive cylinder volume in accordance with the maximum load, and when the compressor is stable, the time to stop the compressor increases, and the temporal fluctuation of the internal temperature of the refrigerator increases. Become. On the other hand, by applying a variable-speed compressor, the loss of such energy-saving effects is reduced, and temporal fluctuations in the internal temperature are suppressed. In addition, since the cylinder volume is reduced, it is possible to further reduce the amount of refrigerant. For this reason, even if the hydrocarbon-based refrigerant, which is a flammable refrigerant, leaks out of the cooling system, the danger of the flammable refrigerant is extremely reduced. The coverage of the vacuum heat insulating material and the design of the thickness of the heat insulating wall of the refrigerator are the same as those of the other embodiments, and the description thereof will be omitted.

Figure 38 shows the structure of the vacuum insulation material. The basic configuration is the same as in Embodiment 10. In FIG. 38, the core material 144 is made of an inorganic fiber aggregate 144 such as glass wool. For the vacuum insulation material, insert the core material 144 into the jacket material where the metal foil layer film 1 46 A and the vapor deposition layer film 1 4 6 B are attached, and evacuate the inside to seal the opening. It is formed by doing. The material, thermal conductivity, and the like of the core material 144 and the films 144A and 146B are the same as those in the tenth embodiment, and thus description thereof is omitted.

By adopting such a configuration, a vacuum heat insulating material having a heat insulating performance approximately 10 times that of a rigid urethane foam can be obtained. For this reason, the effect of reducing the heat absorption of the box body when using vacuum insulation material is greatly increased.As a result, the energy saving effect is greatly increased, and even if the parallel switching system is used, the temperature inside the chamber can be reduced over time. The fluctuation range is reduced, and the food freshness is improved. Further, by further reducing the amount of heat absorption, the required amount of refrigerant can be further reduced, and even if flammable isobutane is used as a refrigerant, the risk of refrigerant leakage is further reduced. In addition, the inorganic fiber aggregate used for the core material 145 has flame retardancy, and the safety in the event that the refrigerator 10 is ignited is increased compared to the case where only the rigid urethane foam is used. .

Figure 39 is a schematic diagram of the vacuum insulation. The thickness 14 9 of the vacuum heat insulating material is 15 mm. In other words, the vacuum heat insulating material is provided so that the surface formed by the two sides 147 and 148 is oriented in a direction perpendicular to the direction in which heat to be insulated passes. Here, it is preferable that the lengths of the sides 1.47 and 148 be 200 mm or more. By doing so, the following effects can be obtained.

Since the gas barrier films 144A and 146B, which form the outer material of the vacuum heat insulating material, each have a metallic film layer, a so-called heat bridge phenomenon occurs due to heat transfer. Therefore, vacuum insulation coating If the lengths of the sides 147 and 148 forming the area are too small, the original heat insulating performance of the vacuum heat insulating material cannot be brought out, and the heat insulating effect on the amount of the vacuum heat insulating material used is reduced. On the other hand, by setting the sides 147 and 148 to be at least 200 mm, it becomes possible to bring out the original heat insulating performance of the vacuum heat insulating material. That is, it has been confirmed by experiments that the heat leak due to the heat bridge is suppressed. From the above, by setting the length of two sides excluding the thickness direction of the three sides constituting the vacuum heat insulating material to 200 mm or more, the original heat insulating performance of the vacuum heat insulating material can be brought out. As a result, vacuum insulation is used with high cost performance, and the heat absorption of the entire refrigerator is effectively reduced. As a result, the energy-saving effect of the present embodiment described above, the effect of improving the freshness of food by reducing the time-varying temperature fluctuation in the refrigerator, and the effect of reducing the risk of natural refrigerant leakage due to the use of less refrigerant. Can be further increased.

The thickness of the vacuum insulation material was set to 15 mm, but if it was within the range of about 5 to 20 mm, there was no possibility of impairing the foam-filling properties of the urethane foam Γ3. Is exhibited.

The present embodiment is the same as Embodiment 1 except for the configuration of the refrigeration cycle and the dimensions of the vacuum heat insulating material. Such a configuration is also effective when applied to the configurations of the other embodiments.

As described above, the embodiments of the present invention have been described. In any of the embodiments, a refrigerator having good appearance and excellent heat insulation performance can be obtained. Note that some configurations specific to each embodiment can be implemented in combination with other embodiments, and such a combination is within the scope of the present invention.

Industrial applicability

According to the present invention, in a refrigerator provided with a resin foam and a vacuum heat insulating material between an outer box and an inner box, by adopting any of the following constitutions, the appearance is good and the heat insulation is efficient. Refrigerator can be provided. (1) The center line average roughness (R a) of the outer surface of the outer case where the vacuum heat insulating material is arranged on the outer case shall be 0.1 m or more. Alternatively, the gloss of the outer surface of the outer box is set to 80 or less.

(7) Vacuum insulation with a heat-dissipating pipe installed on the surface in contact with the outer box is placed inside the outer box.

Claims

The scope of the claims

1. Outer box and

Inner box,

A resin foam and a vacuum heat insulating material are provided between the outer box and the inner box,

The vacuum heat insulating material is provided in contact with the outer box, and the outer box outer surface provided with the vacuum heat insulating material has any one of the following configurations.

refrigerator.

A) The center line average roughness (R a) is 0.1 l m or more, and B) The glossiness is 80 or less.

2. Outer box and

Inner box,

A resin foam and a vacuum heat insulating material between the outer box and the inner box; and a door having a front surface and an inner plate,

The vacuum heat insulating material disposed on the door is attached to the inner plate of the door.

refrigerator.

3. The vacuum heat insulating material disposed on the door is attached to a frontmost portion of an inner plate of the door,

3. The refrigerator according to claim 2.

4. Outer box and

Inner box,

A resin foam and a vacuum heat insulating material between the outer box and the inner box; and an interposition member for preventing deformation of the outer surface of the outer box between the vacuum heat insulator and the outer box.

refrigerator.

5. The interposed member is larger than the vacuum insulation material.

The refrigerator according to claim 4.

6. The interposed member is made of a soft member that is softer than the vacuum heat insulating material.

The refrigerator according to claim 4.

7. The soft member is a resin foam,

The refrigerator according to claim 6.

8. The flexible member is a closed cell,

The refrigerator according to claim 6.

9. The thickness of the soft member is equal to or greater than the flatness of the vacuum heat insulator and equal to or less than the thickness of the vacuum heat insulator.

The refrigerator according to claim 6.

10. The interposed member is made of a hard member that is harder than the vacuum heat insulating material.

The refrigerator according to claim 4.

1 1. The interposed member is composed of a hard member harder than the vacuum heat insulating material and a soft member softer than the vacuum heat insulating material.

The refrigerator according to claim 4.

12. The intervening member is arranged in the order of the hard member and the soft member from the outer box side,

The refrigerator according to claim 11.

1 3. Outer box and Inner box,

A resin foam and a vacuum heat insulating material between the outer box and the inner box; and a heat radiating pipe disposed between the vacuum heat insulating material and the outer box.

A void formed by the vacuum heat insulating material and the heat radiating pipe communicates with the outside of the refrigerator.

refrigerator.

14. A groove is formed in a plane portion of the vacuum heat insulating material facing the heat radiating pipe.

The refrigerator according to claim 13.

15. A fixing member for fixing the heat radiating pipe is further provided, one end of the fixing member is located outside the refrigerator, and the other end of the fixing member is located inside the end of the vacuum heat insulating material.

The refrigerator according to claim 13.

1 6. Outer box and

Inner box,

The vacuum heat insulating material is provided on the outer box, and pores are provided on a surface of the outer box on which the vacuum heat insulating material is provided,

refrigerator.

1 7.

Inner box,

A resin foam and a plurality of vacuum insulation materials between the outer box and the inner box;

Equipped with a machine room at the bottom, The plurality of vacuum heat insulating materials are disposed in contact with the outer box for the upper side surfaces, the top surface, the back surface, and the front surface, and are provided for the bottom surface, the lower side surfaces, and the surfaces constituting the machine room. Arranged in contact with the inner box,

refrigerator.

18. The entire surface of the inner box in contact with the vacuum heat insulating material disposed in contact with the inner box is in contact with each surface of the inner box in which the vacuum heat insulating material is disposed in contact with the inner box.

A refrigerator according to claim 7

19. The refrigerator according to claim 7, further comprising a step on the surface of the inner box on which the vacuum heat insulating material is provided and in contact with an outer peripheral end surface of the vacuum heat insulating material provided on the inner box.

20. The refrigerator according to claim 17, further comprising: a cooler, wherein an inclined member is formed on an upper surface, and a heat insulating member having a flat lower surface and closely attached to the inner box is provided below the cooler. .

21. A cooler is further provided, wherein the inner box has a sloped portion located below the cooler, and between the sloped portion and a vacuum heat insulating material provided in contact with the inner box. Having a heat insulating member that fills the gap that can be

A refrigerator according to claim 17.

22. The inner box has a back surface provided with holes for venting the resin foam.

Refrigerator according to claim 17

23. The position of the lower end of the vacuum heat insulating material provided in contact with the outer box on both upper side surfaces of the refrigerator is the vacuum heat insulating material provided in contact with the inner box on both lower side surfaces of the refrigerator. So that it is lower than the top edge of the timber Was

A refrigerator according to claim 17

24. The vacuum heat insulating material has a first surface composed of a metal-deposited film, and a second surface composed of a film having a metal foil, and the first surface and the second surface. A sealing surface that seals the outer peripheral portion with the surface is coplanar with the first surface;

A refrigerator according to claim 17.

25. The first surface is disposed in contact with the inside of the outer box,

25. The refrigerator according to claim 24.

26. The first surface is disposed in contact with the outer side of the inner box,

25. The refrigerator according to claim 24.

27. The heat radiation pipe is fixed to the inside of the outer box, and further includes a sealing material disposed outside the refrigerator.

14. The refrigerator according to claim 13.

28. The sealing material has at least one of a structure of being divided and a hole being formed.

28. The refrigerator according to claim 27.

29. The heat radiation pipe was disposed inside the outer box, avoiding the top surface of the refrigerator.

28. The refrigerator according to claim 27.

3 0. Outer box and

Inner box,

Resin foam and vacuum insulation between the outer box and the inner box, A heat radiation pipe incorporated in the vacuum heat insulating material disposed inside the outer box.

refrigerator.

31. Both surfaces of the vacuum heat insulating material were formed of a film having a metal foil,

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 2. The vacuum heat insulating material has a sealing allowance for a film, and the sealing allowance is disposed in a direction other than the direction in which the resin foam flows.

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 3. The vacuum insulation material

A core material containing an inorganic fiber aggregate formed into a flat plate shape with a binder,

The refrigerator according to claim 1, further comprising: a gas barrier film that covers the core material.

3 4. An adhesive applied to the entire surface of the surface where the vacuum heat insulating material is in contact with one of the inner box and the outer box,

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 5. The foaming agent of the resin foam contains a hydrocarbon,

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 6. A refrigerator for cooling at least one of the refrigerator compartment and the freezer compartment in the inner box, and a refrigerator for cooling at least one of the refrigerator compartment and the freezer compartment.

Used for the cooler, further comprising: a refrigerant made of hydrocarbon; and

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 7. a first evaporator for cooling the refrigerator compartment in the inner box;

A second evaporator, connected in parallel with the first evaporator, for cooling a freezer in the inner box;

A refrigerant flow switching unit that switches a flow path to one of the first evaporator and the second evaporator;

A compressor that discharges a refrigerant to the refrigerant flow switching unit;

The refrigerator according to any one of claims 1, 2, 4, 13, 13, 16, 17, 30.

3 8. The compressor is a variable speed compressor.

A refrigerator according to claim 37.

3 9. A defrosting water pipe disposed between the outer box and the inner box, wherein the vacuum heat insulating material is disposed between the defrosting water pipe and the inner box. Item 13. The refrigerator according to any one of Items 1, 2, 4, 13, 13, 16, 17, 30.

40. Between the outer box and the inner box, there is a miscellaneous material that obstructs the flow of the resin foam, and the vacuum heat insulating material is provided at a place where the miscellaneous material is present. The refrigerator according to any one of 2, 4, 13, 16, 17 and 30.