WO2017033313A1

WO2017033313A1 - Vacuum heat-insulating material and refrigerator

Info

Publication number: WO2017033313A1
Application number: PCT/JP2015/074036
Authority: WO
Inventors: 努小高; 誠岡部; 孝真西岡; 俊齋藤
Original assignee: 三菱電機株式会社
Priority date: 2015-08-26
Filing date: 2015-08-26
Publication date: 2017-03-02
Also published as: SG11201710697TA; RU2691890C1; AU2015407161A1; CN106482437A; JP6469232B2; AU2015407161B2; JPWO2017033313A1; CN106482437B; CN206001789U; TW201719097A; TWI622747B

Abstract

This vacuum heat-insulating material is configured so that: a core material will be housed within an outer wrapping material; and pressure within the outer wrapping material will be reduced. The outer wrapping material has provided therein: a body filled with a core material; and an outer peripheral section not provided with a core material. The outer peripheral section has an affixed section folded toward the body and affixed to the body; and a non-affixed section not affixed to the body. The vacuum heat-insulating material is configured so that air will not become trapped between the outer peripheral section and the body, and consequently a refrigerator, etc. can be prevented from being deformed by the expansion, etc. of air.

Description

Vacuum insulation and refrigerator

This invention relates to a vacuum heat insulating material and the like. In particular, it relates to ear folding when used in a refrigerator.

Energy saving is strongly desired for household appliances. For example, in a refrigerator, a space between the outer box and the inner box of the refrigerator is filled with a foam heat insulating material so as to prevent cold air leakage from the interior and heat intrusion from the outside. And in a refrigerator, in order to further save energy, the heat insulating material which has the outstanding heat insulation performance is calculated | required.

So, for example, from the inlet on the back side of the refrigerator, not only filling the space between the outer box and the inner box of the refrigerator by filling the foam insulation, but also filling the foam insulation after installing the vacuum insulation Thus, there has been proposed a refrigerator that can further insulate. The vacuum heat insulating material is formed by inserting a core material serving as a spacer into an outer packaging material having a gas barrier property, compressing the outer packaging material to reduce the pressure inside the outer packaging material, and sealing.

Here, for example, the core of the vacuum heat insulating material is formed according to the shape of the space. In addition, heat welding or the like is performed on the outer peripheral portion so that air or the like does not enter the outer packaging material after decompression. For this reason, the outer peripheral part of a vacuum heat insulating material becomes an ear | edge part used as the surplus part which is not filled with the core material.

For example, if the ears of the vacuum heat insulating material attached between the outer box and the inner box of the refrigerator are left as they are, the ears may block the filling of the foam heat insulating material, and the foam heat insulating material may increase. There is sex. Then, the vacuum heat insulating material which performed the ear fold which folds the ear | edge part of a vacuum heat insulating material, fixed the ear | edge part, and was attached to the refrigerator is proposed (for example, refer patent document 1).

JP 2013-245909 A

However, after attaching the folded vacuum heat insulating material, for example, the space between the outer box and the inner box is filled with foam heat insulating material. At this time, a part of the air existing in the space may not stay in the space and may remain in the space. For example, the staying air loses a refuge at the ear fold portion of the vacuum heat insulating material and accumulates. When the refrigerator is operated in a state where air is accumulated, the accumulated air may expand and contract, which may deform the walls inside and outside the refrigerator by applying force to the inner and outer wall surfaces. . For example, in patent document 1, although processing, such as cut | disconnecting an ear | edge part, is performed, the response | compatibility with respect to air is not taken.

The present invention has been made to solve the above-described problems. A vacuum heat insulating material capable of avoiding deformation due to an ear fold while contributing to a reduction in power consumption, and a refrigerator provided with the vacuum heat insulating material. The purpose is to provide.

In order to solve the above problems, a vacuum heat insulating material according to the present invention is a vacuum heat insulating material in which a core material is housed in an outer packaging material and the inside of the outer packaging material is decompressed. A main body portion packed with a material and an outer peripheral portion without a core material, the outer peripheral portion being bent to the main body portion side and fixed to the main body portion, and a non-fixed portion not fixed to the main body portion It has.

In the refrigerator according to the present invention, the vacuum heat insulating material is disposed between the outer box and the inner box so that the surface on the side where the ear portion is bent faces the inner box side. .

According to this invention, since the non-fixed portion that does not fix the outer peripheral portion is formed in the ear fold of the vacuum heat insulating material, a vacuum heat insulating material that does not collect air between the outer peripheral portion and the main body portion can be obtained. . For this reason, it can prevent deform | transforming a refrigerator etc. by expansion | swelling of air etc., for example.

It is the figure which looked at the refrigerator 100 which concerns on Embodiment 1 which concerns on this invention from diagonally forward. It is a figure explaining the internal structure of the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure explaining the structure of the refrigerator box 1a which concerns on Embodiment 1 of this invention. It is FIG. (1) which shows an example of the relationship between the thermal radiation pipe 16 and the vacuum heat insulating material 41 which concern on Embodiment 1 of this invention. It is FIG. (2) which shows an example of the relationship between the thermal radiation pipe 16 and the vacuum heat insulating material 41 which concern on Embodiment 1 of this invention. It is a figure explaining the manufacturing process of the vacuum heat insulating material 41 which concerns on Embodiment 1 of this invention in time series. It is a figure explaining the ear | edge part 46 which concerns on Embodiment 1 of this invention. It is FIG. (1) explaining the ear folding which concerns on Embodiment 1 of this invention. It is FIG. (2) explaining the ear fold which concerns on Embodiment 1 of this invention. It is a figure explaining the non-fixed part 49 which concerns on Embodiment 1 of this invention. It is a figure which shows the inner case 30 which concerns on Embodiment 1 of this invention. It is a perspective view explaining the procedure which forms the foam heat insulating material 40 in the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure which shows the filling path | route of the foam heat insulating material 40 in the side surface of the refrigerator 100 which concerns on Embodiment 1 of this invention. It is a figure which shows the positional relationship of the vacuum heat insulating material 41 and the inlet 23 of the back side which concern on Embodiment 1 of this invention. It is a figure which shows another example of the inlet 23 in the backplate 22 which concerns on Embodiment 2 of this invention. It is a figure which shows the positional relationship of the vacuum heat insulating material 41 and the inlet 23 of the back side which concern on Embodiment 2 of this invention. It is a figure which shows the other example of the injection port 23 in the backplate 22 which concerns on Embodiment 2 of this invention. It is FIG. (1) which shows the example of a shape of the recessed part 42 which concerns on Embodiment 3 of this invention. It is FIG. (2) which shows the example of a shape of the recessed part 42 which concerns on Embodiment 3 of this invention.

Hereinafter, the vacuum heat insulating material according to the embodiment of the invention will be described with reference to the drawings. In the following drawings, the same reference numerals denote the same or corresponding parts, and are common to the whole text of the embodiments described below. And the form of the component represented by the whole specification is an illustration to the last, Comprising: It does not limit to the form described in the specification. In particular, the combination of the components is not limited to the combination in each embodiment, and the components described in the other embodiments can be applied to another embodiment. Further, in the following description, the upper side in the figure is described as “upper side” and the lower side is described as “lower side”. Furthermore, in order to facilitate understanding, terms representing directions (eg, “right”, “left”, “front”, “rear”, etc.) are used as appropriate. The terms do not limit the invention according to the present application. In addition, the vertical direction when the refrigerator is viewed from the front side is the height direction, and the horizontal direction is the width direction. In the drawings, the relationship between the sizes of the constituent members may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a view of a refrigerator 100 according to Embodiment 1 of the present invention as viewed obliquely from the front. Moreover, FIG. 2 is a figure explaining the internal structure of the refrigerator 100 which concerns on Embodiment 1 of this invention. The refrigerator 100 shown in FIG. 1 and FIG. 2 accommodates stored items such as food and is refrigerated (10 ° C. or lower) or frozen (−12 ° C. or lower). The refrigerator 100 includes a refrigerator body 1 and a plurality of doors.

The refrigerator main body 1 has a space to be a plurality of storage rooms (rooms). The refrigerator 100 according to the present embodiment has the refrigerator compartment 2, the freezer compartment (the ice making compartment 3, the first freezer compartment 4, the second freezer compartment 5) and the vegetable compartment 6 as storage rooms from the top. Each storage chamber has an opening on the front side, and covers the opening so that the door can be opened and closed. The

refrigerator compartment doors

7 and 8 are doors that cover the refrigerator compartment 2 and are constituted by two doors of a double door type. The ice making room door 9, the first freezing room door 10, and the second freezing room door 11 are drawer type doors that cover the ice making room 3, the first freezing room 4, and the second freezing room 5, respectively. The vegetable compartment door 12 is a drawer-type door that covers the vegetable compartment 6. Here, the drawer-type door is pulled out together with a storage case for storing stored items.

Refrigerator 100 of the present embodiment has a refrigerant circuit (refrigeration cycle device) for cooling the storage chamber. The refrigerant circuit is configured by connecting a cooler 14, a compressor 15, a condenser, a capillary tube, and the like by piping. In FIG. 2, the cooler 14 and the compressor 15 are shown. The compressor 15 sucks the refrigerant, compresses it, and discharges it in a high temperature / high pressure state. The condenser causes the refrigerant to dissipate heat and condense. In the present embodiment, the heat radiating pipe 16 described later serves as a condenser. In addition, a capillary tube (capillary tube) serving as an expansion device expands the refrigerant passing therethrough by reducing the pressure. The cooler 14 exchanges heat between the refrigerant and air to evaporate the refrigerant. The air cooled by the cooler 14 is sent to each storage room by a blower (not shown). The amount of cold air (the amount of air) sent to each storage room is controlled by an electric open / close damper (not shown) provided in the air passage between the cooler 14 and each storage room.

Here, isobutane (R600a) is used as the refrigerant circulating in the refrigeration cycle apparatus in the present embodiment. Although other refrigerants may be used, isobutane has advantages such as not destroying the ozone layer when discarded and having a low global warming potential.

As shown in FIG. 1, the control board 13 serving as a control device is a board that controls the temperature of each storage room in the refrigerator 100, the number of rotations of the compressor 15, and the like. The control board 13 is provided on the upper rear side of the refrigerator body 1.

FIG. 3 is a diagram illustrating the configuration of the refrigerator box 1a according to Embodiment 1 of the present invention. The refrigerator box 1a has an outer box 20 that is an outline of the refrigerator body 1 and an inner box 30 that is configured by partitioning a storage chamber. The outer box 20 has at least a side plate 21 and a back plate 22. The side plate 21 and the back plate 22 are made of iron plates having a thickness of about 0.4 to 0.5 mm.

Further, the outer box 20 has an R-bending portion (inner box locking portion) 21a for locking the inner box 30 to the outer box 20 on the front side opening side of the refrigerator box 1a. The inner box 30 is attached to the outer box 20 by the R bent portion 21a of the outer box 20 being elastically deformed and sandwiched with the locked portion 31a of the inner box 30.

Moreover, the refrigerator box 1a of the refrigerator 100 according to the present embodiment has a foam heat insulating material 40 and a vacuum heat insulating material 41 between the outer box 20 and the inner box 30 to insulate the inside and outside of the refrigerator 100.

The vacuum heat insulating material 41 is fixed to the refrigerator inner surface side of the side plate 21 and the back plate 22. Further, the foam heat insulating material 40 fills the space between the outer box 20 and the inner box 30. By fixing the vacuum heat insulating material 41 to the side plate 21 and the back plate 22, the foam heat insulating material 40 is prevented from entering between the side plate 21 and the back plate 22 and the vacuum heat insulating material 41. For this reason, the heat insulation effect of the vacuum heat insulating material 41 can be exhibited. The filling of the foam insulation 40 will be described later.

4 and 5 are diagrams showing an example of the relationship between the heat radiating pipe 16 and the vacuum heat insulating material 41 according to Embodiment 1 of the present invention. As described above, the vacuum heat insulating material 41 of the present embodiment is fixed to at least the inner surfaces of the side plate 21 and the back plate 22. At this time, the vacuum heat insulating material 41 fixed to the side plate 21 covers the heat radiating pipe 16 serving as a condenser and is fixed together with the heat radiating pipe 16.

The heat radiating pipe 16 functions as a condenser as described above, and radiates the heat of the refrigerant to the outside of the refrigerator 100 through the side plate 21. In the present embodiment, the heat radiating pipe 16 is a copper pipe having a diameter of about 4.0 to 5.0 mm. Moreover, the heat radiating pipe 16 fixed to each side plate 21 is formed by folding one copper pipe in the vertical direction. For this reason, the flow path of the refrigerant can be lengthened within a limited range. At this time, the interval between the adjacent copper tubes is set to the dimension W1 by folding. Here, the shape, material, dimensions and the like of the heat radiating pipe 16 are not limited to the examples of FIGS. 4 and 5.

The vacuum heat insulating material 41 blocks the heat from entering the refrigerator 100 from the outside. Further, by covering the heat radiating pipe 16 with the vacuum heat insulating material 41, heat is also insulated from the heat radiation of the refrigerant. The vacuum heat insulating material 41 has a recess 42 that covers the heat radiating pipe 16. As described above, the distance between adjacent copper tubes due to the folding of the copper tube is the dimension W1. For this reason, the space | interval between the recessed parts 42 is also set to the dimension W1. Further, the depth D1 of the recess 42 is set to be equal to or larger than the diameter of the heat radiating pipe 16. For example, when filling the foam heat insulating material 40, the vacuum heat insulating material 41 comes into contact with the heat radiating pipe 16, pressurizes the heat radiating pipe 16, and presses against the side plate 21 or the like so as not to cause an appearance defect. The width dimension L1 of the recess 42 in the present embodiment is 40 to 70 mm. About the width dimension L1 of the recessed part 42, the assembly | attachment tolerance which generate | occur | produces in a refrigerator manufacturing process is considered. As for the assembly tolerance, for example, a manufacturing error in forming the recess 42, an attachment error in attaching the vacuum heat insulating material 41 to the side plate 21, the bending of the heat radiating pipe 16 on the side plate 21, and the side of the heat radiating pipe 16 This is an attachment error to the face plate 21 or the like. The width dimension L1 of the recess 42 is set to such a length that the recess 42 can accommodate the heat radiating pipe 16 even if these errors occur.

<Configuration of vacuum heat insulating material 41>
The vacuum heat insulating material 41 includes an outer packaging material 43 and a core material 44. The outer packaging material 43 wraps and protects the core material 44. Moreover, the internal vacuum state is maintained. The outer packaging material 43 is made of, for example, a metal-deposited laminated film having a plastic layer for heat welding. On the other hand, the core material 44 overlaps the laminated body 45 of multiple layers. In the present embodiment, as will be described later, the core material 44 is produced by stacking three layers 45. The laminated body 45 is generally made of glass wool, glass fiber, alumina fiber, silica alumina fiber, natural fiber such as cotton, or the like.

FIG. 6 is a diagram for explaining the manufacturing process of the vacuum heat insulating material 41 according to Embodiment 1 of the present invention in time series. Next, based on FIG. 6, the manufacturing procedure of the vacuum heat insulating material 41 is demonstrated. Here, although the thickness of each laminated body 45 and the core material 44 changes in a manufacturing process, it is not changing in FIG. FIG. 6 shows an example. For example, the number of laminated bodies 45 such as the first laminated bodies 45a, 45b, and 45c laminated on the second laminated body 45d. However, the present invention is not limited to this example.

First, the inorganic fibers of the raw cotton used as the material of the core material 44 are dried. The dried inorganic fiber is cut to a predetermined size to form first laminated bodies 45a, 45b and 45c, a second laminated body 45d and a third laminated body 45e. Then, as shown in FIG. 6A, the first laminated bodies 45a, 45b and 45c, the second laminated body 45d and the third laminated body 45e are laminated in three stages to form the core material 44. Here, the second stacked body 45d is disposed above the third stacked body 45e. In addition, the first stacked bodies 45a, 45b, and 45c are arranged above the second stacked body 45d. The arrangement of the first laminates 45a, 45b and 45c is adjusted, and the width dimension L1 of the recess 42 is adjusted. In addition, the first laminated bodies 45a, 45b, and 45c are set to have a thickness such that the thickness after decompression is 5 mm, for example. Then, as shown in FIG. 6B, the core material 44 is wrapped with an outer packaging material 43. In this example, the outer packaging material 43 is formed in a bag shape, and the outer peripheral portion other than the portion opened to insert the core material 44 becomes an ear portion 46 formed by heat welding. The ear portion 46 is formed with a width of 20 to 50 mm, for example, at the outer peripheral end portion of the vacuum heat insulating material 41.

Further, the core material 44 wrapped with the outer packaging material 43 is placed in a vacuum chamber (not shown). And while pressurizing the core material 44 with the press machine 50, the air in the outer packaging material 43 is extracted from the portion where the outer packaging material 43 is not welded, and the core material 44 is compressed to a predetermined thickness. When the inside of the outer packaging material 43 is in a vacuum state, for example, as shown in FIG. 6C, the welding machine 60 heats and welds the opening portion of the outer packaging material 43, and closes the opening portion. In addition, an ear portion 46 which is an outer peripheral portion is formed in the vacuum heat insulating material 41.

Here, for example, the core material 44 of the present embodiment has the recess 42, but if the outer packaging material 43 is sealed in a state where the air in the portion of the recess 42 does not escape, the core material 44 is deformed in the atmosphere. The height of the recess 42 is lowered. Further, the surface opposite to the surface on which the concave portion 42 is formed can be uneven. For this reason, heat insulation performance falls. Therefore, a convex surface that matches the shape of the concave portion 42 is formed in the press machine 50 so that the air in the concave portion 42 can escape when pressed. As described above, the vacuum heat insulating material 41 is manufactured as shown in FIG.

FIG. 7 is a diagram for explaining the ear portion 46 according to Embodiment 1 of the present invention. As described above, by welding the outer packaging material 43 to form the vacuum heat insulating material 41, the ear 46 and the core material 44 that do not have the core material 44 are clogged around the vacuum heat insulating material 41. A vacuum heat insulating body 47 is formed. The ear | edge part 46 is a part which does not contribute to heat insulation. For example, if it fixes between the outer box 20 and the inner box 30 with the ear | edge part 46 extended, the area of the vacuum heat insulating material main-body part 47 effective for heat insulation will decrease. Moreover, the filling of the foam heat insulating material 40 will be inhibited.

8 and 9 are diagrams for explaining the ear folding according to the first embodiment of the present invention. FIG. 8 is a diagram showing normal ear folding. FIG. 9 is a diagram showing an ear fold in the case of having a processed portion 44 a obtained by pressing a part of the core material 44. In the present embodiment, in order not to spread the ear portion 46, the ear fold is performed to fold the ear portion 46. Here, the ear 46 is folded to the surface opposite to the surface having the recess 42 (the side facing the inner box 30). Then, a portion that becomes the outer edge 46 a of the folded ear portion 46 is fixed with a tape 48 to the vacuum heat insulating material main body 47 in which the core material 44 is wrapped. The portion fixed with the tape 48 becomes a fixed portion. In the present embodiment, the outer edge 46a is fixed with the tape 48, but may be fixed by heat welding, for example. Here, as shown in FIG. 9, particularly when the processing portion 44a is provided, air easily collects in the folded portion.

FIG. 10 is a diagram for explaining the non-fixed portion 49 according to Embodiment 1 of the present invention. In the present embodiment, when the ear is folded, at least one or more non-fixed portions 49 that are not fixed with the tape 48 are formed on the outer edge 46a of the ear portion 46. The non-fixed portion 49 is a portion serving as an air escape port so as not to completely seal the space between the ear portion 46 and the vacuum heat insulating material main body portion 47 formed by the ear fold with the tape 48. About the position of the non-fixed part 49, it forms in the ear | edge fold part in the longitudinal direction of the vacuum heat insulating material 41, for example. Furthermore, as will be described later, it is desirable that the foam heat insulating material 40 is determined by a path in which the space between the outer box 20 and the inner box 30 is filled. In the present embodiment, the vacuum heat insulating material 41 is formed at the center in the longitudinal direction on the front side (door side) of the refrigerator 100.

Here, if there are few fixed portions where the outer edge 46a of the ear portion 46 is fixed with the tape 48, the tape 48 is easily peeled off. In addition, the urethane foam stock solution that is the material of the foam heat insulating material 40 enters between the ear 46 and the vacuum heat insulating material main body 47, so that the stock solution does not reach the place where filling is necessary, and the foam heat insulating material 40 is filled. There is a possibility that a part that is not done will occur. Therefore, basically, it is better that the number of non-fixed portions 49 is small.

FIG. 11 is a diagram showing the inner box 30 according to the first embodiment of the present invention. As shown in FIG. 11, in this embodiment, the inner box 30 has a spacer 34 that is convex on the outer surface. The position of the non-fixed portion 49 in the vacuum heat insulating material 41 described above corresponds to the installation position of the spacer 34. Since the ear portion 46 in the non-fixed portion 49 is not fixed, the ear portion 46 may be lifted. When the ear | edge part 46 is floating, it may block | close between the outer box 20 and the inner box 30, and may inhibit filling with the foam heat insulating material 40. FIG. Therefore, the space between the outer box 20 and the inner box 30 is secured by suppressing the expansion of the ears 46 that are not fixed at the non-fixed part 49 by the spacer 34. The filling of the foam heat insulating material 40 in the space between the outer box 20 and the inner box 30 is not hindered.

Here, the spacer 34 may be formed in, for example, a mold of the inner box 30 and may be formed as a part of the inner box 30. Further, it may be formed of a tape, polystyrene foam or the like and attached to the inner box 30.

FIG. 12 is a perspective view for explaining the procedure for forming the foam insulation 40 in the refrigerator 100 according to Embodiment 1 of the present invention. In the present embodiment, the refrigerator box 1 a has inlets 23 (23 a to 23 d) at the four corners of the back plate 22. A urethane foam stock solution that is a material of the foam heat insulating material 40 is injected into the injection ports 23a to 23d.

The vacuum heat insulating material 41 is temporarily fixed to the inner surface side of the outer box 20 in advance by heat welding, aluminum tape, or the like. When the urethane foam stock solution is foamed and the foam heat insulating material 40 is filled, the vacuum heat insulating material 41 is pushed by the foam heat insulating material 40 and fixed to the inner surface side of the outer box 20.

FIG. 13 is a diagram showing a filling path of the foam heat insulating material 40 on the side surface of the refrigerator 100 according to Embodiment 1 of the present invention. A urethane foam injection head 70 is attached to the injection ports 23a to 23d to inject a urethane foam stock solution. The injected urethane foam stock solution wraps around the entire front edge side in the space between the outer box 20 and the inner box 30 of the refrigerator box 1a and starts foaming.

As shown in FIG. 13, on the side surface of the refrigerator 100, after the urethane foam undiluted solution flows from the back side to the front side of the refrigerator 100, it flows toward the central portion of the refrigerator 100 and foams on the front side. There is a route that is filled. Moreover, after the urethane foam undiluted solution flows toward the central portion of the refrigerator 100 on the back side of the refrigerator 100, there is a path in which the foamed thermal insulation material 40 is filled after flowing from the back side of the refrigerator 100 to the front side. .

For example, if the non-fixed portion 49 is filled with the foam heat insulating material 40 before the air between the ear portion 46 and the vacuum heat insulating material main body portion 47 escapes, the space between the ear portion 46 and the vacuum heat insulating material main body portion 47 is obtained. The air is trapped. For this reason, it is good for the foam heat insulating material 40 to have the non-fixed part 49 in the position corresponding to the part where filling is the last. Therefore, in the present embodiment, as described above, the non-fixed portion 49 is formed at the position on the front side of the refrigerator 100 at the center of the vacuum heat insulating material 41 in the longitudinal direction. This position corresponds to the position farthest from the inlet 23a and the inlet 23b. By forming the non-fixed portion 49, air between the ear portion 46 and the vacuum heat insulating material main body portion 47 can escape.

FIG. 14 is a diagram showing the positional relationship between the vacuum heat insulating material 41 on the back side and the inlet 23 according to Embodiment 1 of the present invention. For example, as shown in FIG. 14, the non-fixed part 49 is formed in two places of the ear | edge part 46 about the vacuum heat insulating material 41 fixed to the back side based on the filling path | route of the foam heat insulating material 40. As shown in FIG. In the vacuum heat insulating material 41 of the present embodiment, a non-fixed portion 49 of the vacuum heat insulating material 41 is provided so as to correspond to the central portions of the injection ports 23a and 23c and the injection ports 23b and 23d.

As described above, according to the first embodiment, since the non-fixed portion 49 that does not fix the ear portion 46 is formed in the ear fold, air flows between the ear portion 46 and the vacuum heat insulating material main body portion 47. The vacuum heat insulating material 41 which does not accumulate can be obtained. For this reason, by the operation of the refrigerator 100, the accumulated air expands and contracts, and the outer box 20 and the inner box 30 of the refrigerator 100 are pressurized, so that the refrigerator 100 that is not deformed can be obtained. Moreover, since air does not accumulate, when filling the foam heat insulating material 40, the unfilled part of the foam heat insulating material 40 can be reduced, and the refrigerator 100 with good heat insulation performance can be obtained.

Furthermore, by forming the inlets 23a to 23d for injecting the urethane foam stock solution at the four corners of the back plate 22, the covering area of the vacuum heat insulating material 41 can be expanded and the heat insulating performance can be improved.

Embodiment 2. FIG.
FIG. 15 is a view showing another example of the inlet 23 in the back plate 22 according to Embodiment 2 of the present invention. In the refrigerator 100 of the first embodiment, the inlets 23 a to 23 d are provided at the four corners of the back plate 22. In FIG. 15, injection ports 23a to 23d are provided at four locations, two in the upper corner of the back plate 22 and two in the central portion.

FIG. 16 is a diagram showing the positional relationship between the vacuum heat insulating material 41 on the back side and the inlet 23 according to Embodiment 2 of the present invention. As shown in FIG. 16, the non-fixed part 49 of the vacuum heat insulating material 41 is provided so as to correspond to the central portions of the inlets 23a and 23c and the inlets 23b and 23d.

FIG. 17 is a view showing another example of the inlet 23 in the back plate 22 according to Embodiment 2 of the present invention. In FIG. 17, injection ports 23 a and 23 b are provided at two locations in the central portion of the back plate 22.

As described above, according to the second embodiment, by providing the non-fixed portion 49 of the vacuum heat insulating material 41 at a position corresponding to the position of the injection port 23, the gap between the ear portion 46 and the vacuum heat insulating material main body portion 47 is provided. Air can be prevented from accumulating.

Embodiment 3 FIG.
18 and 19 show examples of the shape of the recess 42 according to Embodiment 3 of the present invention. In the first embodiment, the concave portion 42 is formed to have a rectangular shape, but the present invention is not limited to this. For example, as shown in FIG. 18, the space of the recess 42 can be formed in a triangular shape. Moreover, it can be made into a semi-elliptical shape as shown in FIG.

1 Refrigerator body, 1a Refrigerator box, 2 Refrigeration room, 3 Ice making room, 4 First freezing room, 5 Second freezing room, 6 Vegetable room, 7, 8 Refrigeration room door, 9 Ice making room door, 10 1st freezing room Door, 11 Second freezer door, 12 Vegetable room door, 13 Control board, 14 Cooler, 15 Compressor, 16 Heat radiation pipe, 20 Outer box, 21 Side plate, 21a R bending part, 22 Back plate, 23, 23a , 23b, 23c, 23d, inlet, 30 inner box, 31a locked portion, 34 spacer, 40 foam heat insulating material, 41 vacuum heat insulating material, 42 concave portion, 43 outer packaging material, 44 core material, 44a processed portion, 45 laminate 45a, 45b, 45c 1st laminated body, 45d 2nd laminated body, 45e 3rd laminated body, 46 ear part, 46a outer edge, 47 vacuum heat insulating material body part, 48 tape, 49 unfixed , 50 presses, 60 welding machine, 70 urethane foam injection head, 100 refrigerator.

Claims

A vacuum insulating material in which a core material is stored in an outer packaging material, and the inside of the outer packaging material is decompressed,
The outer packaging material is
In the inside, comprising a main body portion packed with the core material, and an outer peripheral portion without the core material,
The said outer peripheral part is a vacuum heat insulating material which has the fixing | fixed part bent to the said main-body part side, and was fixed to the said main-body part, and the non-fixed part which is not fixed to the said main-body part.
The vacuum heat insulating material according to claim 1, wherein the fixed portion and the non-fixed portion are outer edges in the outer peripheral portion.
A refrigerator in which the vacuum heat insulating material according to claim 1 or 2 is disposed between an outer box and an inner box so that a surface on the side where the outer peripheral portion is bent faces the inner box side.
The refrigerator according to claim 3, wherein the inner box includes a spacer for pressing the outer peripheral portion that is not fixed in the non-fixed portion.
The refrigerator according to claim 3 or 4, wherein the outer box has two or more inlets for injecting a material of foam heat insulating material to be filled between the outer box and the inner box.
The said inlet is located in two places of the height direction of the said refrigerator, and the said vacuum heat insulating material has the said non-fixing part in the position used as the approximate middle of the said two inlets. Refrigerator.
The said inlet is located in two places of the width direction of the said refrigerator, and the said vacuum heat insulating material has the said non-fixing part in the position which becomes the substantially middle of the said two inlets. refrigerator.