WO2022172482A1

WO2022172482A1 - Heat insulation casing body and refrigerator equipped with same

Info

Publication number: WO2022172482A1
Application number: PCT/JP2021/026980
Authority: WO
Inventors: 洋平丹野; 謙治塩野; 智史小沼; 康之上甲
Original assignee: 日立グローバルライフソリューションズ株式会社
Priority date: 2021-02-15
Filing date: 2021-07-19
Publication date: 2022-08-18
Also published as: JP2022124132A; JP7420757B2

Abstract

The present invention provides a heat insulation casing body capable of removing foamed urethane from inside the walls of the casing body, expanding the internal capacity of the casing body while maintaining the rigidity and heat-insulating properties of the casing body, and decreasing manufacturing costs.　A heat insulation casing body according to the present invention includes: a casing body (100) provided with an inner casing (101) and an outer casing (102) disposed outward of the inner casing (101); a machine chamber space (105) formed toward the bottom on the rear side of the casing body (100); and a side-surface section molding urethane (110) that joins at least both side surfaces to the outer side of the inner casing (101). A casing body wall inner space (107) is included between the outer casing (102) and the side-surface section molding urethane (110). An inner casing support member (106) that supports the inner casing (101) is provided in front of the machine chamber space (105).

Description

Insulation box body and refrigerator provided with the same

The present invention relates to a heat insulating box body and a refrigerator equipped with the same.

In recent years, in addition to the conventional needs for price and energy-saving performance, there has been a growing need for installation dimensions and storage capacity for household refrigerators. In a highly energy-saving refrigerator, the box is generally made up of four laminated plates: an inner box, urethane foam, vacuum insulation, and an outer box. It is necessary to make the plate thinner.

Among the four members in the laminate, the urethane foam portion tends to be the thickest, and it is effective to reduce or remove the urethane foam portion as a means of thinning the laminate. In addition, in order to fill the laminate with foamed urethane without gaps, the laminate must have an appropriate thickness. That is, by removing the foamed urethane from the inside of the laminate, it is possible to reduce the thickness to an arbitrary thickness.

For example, there is a technique described in Patent Document 1 as a technique related to a refrigerator box from which urethane foam is partially removed. In Patent Document 1, ``In the back insulation wall, the surface area corresponding to the inner box of the vacuum insulation panel and the back surface corresponding to the outer box of the vacuum insulation panel are set so that the area without the foam insulation member is larger than that of the side insulation wall. It is stated that

In addition, there is Patent Document 2, for example, as a technique related to a refrigerator box from which urethane foam is completely removed. In Patent Document 2, "having an outer box, an inner box arranged in the outer box, and a vacuum heat insulating material provided between the outer box and the inner box, a space between the corners of the outer box and the inner box describes that when heat is applied in a fluid state, a seal member is arranged so as to harden so as to come into contact with the adjacently arranged vacuum heat insulating material.

JP 2016-217704 A JP 2014-126224 A

In order to contribute to the expansion of the internal volume of the refrigerator box and the reduction of the manufacturing cost, the urethane foam was completely removed to reduce the thickness of the box wall and eliminate the cost of the urethane foaming process. It is required to ensure the rigidity and heat insulation of the body. The above patent document 1 has a structure in which urethane foam is partially removed, and there is a region where there is no urethane foam on the back of the box, but urethane foam is present on the sides. Hardening jigs and process costs may be required.

In addition, although Patent Document 2 has a structure in which urethane foam is completely removed, the space between the inner and outer boxes is filled with a vacuum insulation material, and necessary refrigerant pipes, etc., are provided between the inner and outer boxes. Placement can be difficult. Also, in order to secure the rigidity and heat insulation of the box, it is necessary to increase the thickness of the vacuum insulation material. damage may occur.

The object of the present invention is to solve the above problems. An object of the present invention is to provide a heat insulating box and a refrigerator having the same, which can reduce the cost.

In order to achieve the above object, the present invention provides, for example, a box body comprising an inner box and an outer box arranged outside the inner box, and a A machine room space and side heat insulating members joined to at least both side surfaces of the outer side of the inner box, a space between the outer box and the side heat insulating members, and the machine room space A support member for supporting the inner box is provided at the front.

According to the present invention, there is provided a heat-insulating box which can expand the internal volume of the box and reduce the manufacturing cost after removing urethane foam from the inside of the box body wall to ensure the rigidity and heat insulation of the box. A fully equipped refrigerator can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external perspective view of the front side of the refrigerator box body which concerns on Example 1 of this invention. It is an external perspective view of the back side of the refrigerator box body which concerns on Example 1 of this invention. FIG. 2 is a cross-sectional view (cross-sectional view taken along the line III-III in FIG. 2) of the refrigerator casing according to the first embodiment of the present invention on the ZX plane; FIG. 2 is a cross-sectional view (cross-sectional view taken along line IV-IV in FIG. 2) of the refrigerator box body according to Example 1 of the present invention on the YZ plane. FIG. 10 is a cross-sectional view on the YZ plane of the refrigerator box according to Example 2 of the present invention; FIG. 10 is a cross-sectional view on the YZ plane of the refrigerator box body according to Example 3 of the present invention; FIG. 10 is a cross-sectional view of the refrigerator box on the ZX plane according to Example 4 of the present invention; FIG. 10 is a cross-sectional view of the refrigerator box on the ZX plane according to Example 5 of the present invention; FIG. 11 is a cross-sectional view of the refrigerator box on the ZX plane according to the sixth embodiment of the present invention; FIG. 11 is a cross-sectional view of the refrigerator box on the ZX plane according to Embodiment 7 of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Similar components are denoted by similar reference numerals, and similar descriptions are not repeated.

The various constituent elements of the present invention do not necessarily have to be independent entities, and one constituent element may consist of a plurality of members, a plurality of constituent elements may consist of one member, a certain constituent element may part of a component, part of one component overlaps part of another component, and so on.

In the following explanation, a refrigerator is used as an example of a heat insulating box. 1 is an external perspective view of the front side of a refrigerator box according to Embodiment 1 of the present invention, FIG. 2 is an external perspective view of the rear side of the refrigerator box according to Embodiment 1 of the present invention, and FIG. A cross-sectional view on the ZX plane of the refrigerator box according to the first embodiment (cross-sectional view along the line III-III in FIG. 2), and FIG. 4 is a YZ plane of the refrigerator box according to the first embodiment of the present invention. FIG. 2 shows a cross-sectional view (cross-sectional view taken along line IV-IV in FIG. 2). The width direction of the box is defined as the X direction, the height direction as the Y direction, and the depth direction as the Z direction.

As shown in FIG. 3, the box 100 of Example 1 is formed in a rectangular shape when viewed from the height direction (Y direction). As shown in FIG. 1, the box body 100 of Example 1 includes an inner box 101 forming the inside of the refrigerator, outer boxes 102 arranged on the left and right sides of the inner box 101, and an upper portion of the inner box 101. It has a top plate 103 arranged in the outer box and legs 104 arranged in the lower part of the outer box.

A machine room space 105 for housing a compressor (not shown) is formed below the back surface of the box 100, as shown in FIG. An inner box support member 106 (support member) for supporting the inner box 101 is provided in front of the machine room space 105 .

Furthermore, as shown in FIG. As shown in FIG. 4, the top surface molded urethane 112 arranged above the inner box 101, the bottom molded urethane 113 (bottom part heat insulating member) arranged on the bottom side of the inner box 101, and the machine room space Machine room upper molded urethane 114 (machine room upper heat insulating member) arranged above 105 and machine room front molded urethane 115 (machine room front heat insulating member) arranged in front of the machine room space 105 are provided. . Each molded urethane is placed in a box wall inner space 107 (space) formed by the inner box 101 and the outer box 102 and the inner box 101 and the top plate 103 . Each molded urethane acts as an insulating member.

The outer box 102 has outer

box side portions

102a and 102b arranged on the outside of both side surfaces of the inner box 101, an outer box rear portion 102c arranged on the outer side of the rear surface of the inner box 101, and a lower portion of the outer box rear portion 102c. It consists of an outer box bottom portion 102 d bent toward the inner box 101 . The outer box bottom 102d forms the upper part of the machine room space 105. As shown in FIG.

Although not shown in FIGS. 1 to 4, the box 100 is provided with a door, an internal shelf, cooling devices, and the like to constitute a refrigerator.

As shown in FIG. 3, each part molded urethane such as side part molded urethane 110 (side part heat insulation member) and back part molded urethane 111 (back part heat insulation member) is joined on each outer peripheral surface of the integrated inner box 101. The joining method is optional, such as adhesive or screwing. Further, the entire contact surfaces of the molded urethane and the inner box may be joined, or the ends may be partially joined. Also, the molded urethanes of each part may be joined together, or may not be joined together. Inside the wall of the box 100, there is a box wall space 107 in which cooling parts such as heat radiation pipes are installed. good. In addition, the inner box 101 and the outer box 102 are in contact with each other at the box front edge 116 located on the front side of the box 100, and are fitted or joined at the box front edge 116. good too. By joining, the rigidity of the whole box can be improved.

As shown in FIG. 4, one end (upper end) of the inner case support member 106 is connected to the inner case 101, and the other end (lower end) is connected to the outer case. Since the inner box 101 is directly joined to the upper end of the inner box supporting member 106 installed in the machine room space 105, the deformation of the inner box 101 sinking downward is suppressed. The inner box support member 106 has, for example, a cross section cut in the XZ direction of a portion extending in the Y direction (height direction) and a cross section cut in the XY direction of a portion extending in the Z direction (depth direction). It has an L shape. It is preferable to provide two inner box support members 106 on both sides of the box 100 in the X direction (horizontal direction).

The inner box supporting member 106 is partially connected to the outer box 102, the legs of the refrigerator, or the installation floor of the refrigerator except for the upper end of the inner box supporting member 106, and the load from the inner box 101 is directly applied via the inner box supporting member 106. Alternatively, it is indirectly transmitted to the installation floor. The inner box support member 106 is placed near the center of the inner box in the depth direction by installing it on the front side (left side in FIG. 4) in the machine room space 105 where the cooling equipment such as the compressor is installed. It is possible to reduce the moment against the weight inside the refrigerator.

In Embodiment 1, since molded urethane is arranged on each outer peripheral surface of the inner box 101, the heat insulation of the box can be ensured. Further, by joining the molded urethane to the inner box 101 and using the molded urethane as a reinforcing member, the rigidity of the box 100 can be improved. In particular, the rigidity of the box 100 can be effectively improved by joining the side surface molding urethane 110 to both side surfaces of the inner box 101 that contributes greatly to the rigidity of the box. In other words, it is optional to install molded urethane on other parts such as the rear surface, top surface, bottom surface, upper part of the machine room, and front part of the machine room. A box wall inner space 107 is formed between the outer box 102 and the molded urethane, in which cooling parts such as heat radiation pipes can be arranged. Due to the presence of this space, the inner box 101 may sink downward against the weight inside the refrigerator, but the inner box support member 106 provided in the machine room space 105 suppresses this downward deformation. can do. By arranging the bottom molded urethane 113 shown in FIG. 4 so as to be in contact with the inner box and the outer box, the bottom molded urethane 113 can also suppress the downward deformation of the inner box 101. .

In a structure having urethane foam, it is necessary to consider the fluidity of urethane in the urethane foaming process, and there is generally a limit to how thin the box wall can be made. Since there is no urethane foam inside the box wall, it is possible to reduce the thickness of the box wall to an arbitrary thickness. In addition, since the urethane foaming process can be omitted when manufacturing the box body, the jigs and process costs can be reduced, contributing to a reduction in manufacturing costs. This structure can be generally applied to various boxes having a heat insulating function in addition to refrigerators. In the first embodiment, molded urethane is used as the heat insulating member, but styrofoam preformed into blocks or other heat insulating members may be used instead.

Next, Example 2 will be described with reference to FIG. FIG. 5 is a cross-sectional view on the YZ plane of a refrigerator box body according to Embodiment 2 of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

In Example 2, one end (upper end) of the inner box support member 206 is connected to the outer box bottom 102d, and the other end (lower end) is connected to the outer box.

A machine room upper molded urethane 114 is arranged above the outer box bottom 102 d , and the outer box bottom 102 d is in contact with the machine room upper molded urethane 114 . Machine room upper molded urethane 114 is joined to inner box 101 . That is, the load from the inner box 101 including the weight inside the chamber is transmitted to the inner box support member 206 via the machine room upper molded urethane 114 and the outer box bottom 102d. The parts other than the upper end of the inner box support member 206 are partially connected to the outer box 102, the legs of the refrigerator, or the floor on which the refrigerator is installed, and the load of the inner box is transmitted to the floor on which the refrigerator is installed, as in the first embodiment. be.

In Embodiment 1 shown in FIG. 4, the inner box supporting member 106 is directly joined to the inner box 101. In this case, the cold air inside the inner box 101 is directly transmitted to the inner box supporting member 106, and the outside of the box body is cooled. Since it is easy to leak into the air, there is a possibility that the insulation performance of the box will be deteriorated. Also, in order to directly join the inner box supporting member 106 and the inner box 101, it is necessary to partially process the machine chamber upper molding urethane 114. FIG.

On the other hand, in Example 2 shown in FIG. Decrease can be suppressed. In addition, the load from the inner box can be transmitted to the installation floor via the inner box support member 206 without processing the upper molding urethane 114 of the machine room.

Next, Example 3 will be described with reference to FIG. FIG. 6 is a cross-sectional view on the YZ plane of a refrigerator box body according to a third embodiment of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

In the box 300, a reinforcing member 301 is installed on the rear side of the machine room space 105 (on the right side in FIG. 6). The reinforcing member 301 is joined to the outer

case side portions

102a and 102b and the outer case rear portion 102c. The inner box supporting member 306 is joined to the inner box 101 side and mainly supports the load from the inner box, while the reinforcing member 301 is joined to the outer box side to improve the rigidity of the entire box body. The reinforcing member 301 may be installed only at one place, or may be installed at a plurality of places.

Next, Example 4 will be described with reference to FIG. FIG. 7 is a sectional view on the ZX plane of a refrigerator box according to Embodiment 4 of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

The box 400 is formed in a rectangular shape when viewed from the height direction (Y direction). In the box 400 , reinforcing

posts

401 , 402 , 403 , 404 are installed at the four corners of the box inside the box wall space 107 . The reinforcing columns extend in the height direction (Y direction) of the box 400 and are joined to the outer box back surface 102c and the outer

box side surfaces

102a and 102b, thereby improving the rigidity of the entire box. As shown in FIG. 7, the reinforcing columns may be installed at all four corners of the box, or only the reinforcing

columns

401 and 402 on the front side of the box, or the reinforcing

columns

403 and 403 on the rear side of the box. 404 only. Moreover, the cross-sectional shape of the reinforcing column may be L-shaped, cylindrical, rectangular, or the like.

Next, Example 5 will be described with reference to FIG. FIG. 8 is a sectional view on the ZX plane of the refrigerator box according to the fifth embodiment of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

In the box body 500, inside the side portion molding urethane 510 (510a, 510b) serving as a side heat insulating member, an insert reinforcing member 511 (511a, 511b) serving as a reinforcing member is inserted. The

insert reinforcing members

511a and 511b are made of resin or metal harder than molded urethane, thereby further improving the rigidity of the box. The height position in the inner box 101 where the reinforcing

members

511a and 511b are installed is arbitrary, but by installing them in the vicinity of the shelf receiver in the inner box, the rigidity of the inner box against the weight of the shelf can be effectively improved. can be improved to The urethane foams 510a and 510b formed on the side surfaces and the inner box 101 may be joined by adhesion, or may be screwed via

insert reinforcing members

511a and 511b. Further, the insertion reinforcing member may be inserted in all of the molded urethane such as the side portion and the back portion, or may be inserted only in a part of the molded urethane such as only the side portion.

Next, Example 6 will be described with reference to FIG. FIG. 9 is a sectional view on the ZX plane of the refrigerator box body according to the sixth embodiment of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

In the box body 600, only the side molded urethane 110 (110a, 110b) is joined to the inner box 101, and the rear molded urethane 111 arranged on the back of the inner box 101 is not joined to the inner box 101. In other words, an inner box back space 601 is formed between the inner box 101 and the back molded urethane 111 . By configuring in this way, it is possible to reinforce both side surfaces of the inner box 101, which greatly contributes to the rigidity of the box body, while suppressing the joining cost of the rear molded urethane 111. FIG. By adopting a form in which other top surface portion molded urethane and bottom portion molded urethane are not bonded to the inner box 101, the bonding cost can be further reduced. In Embodiment 6, for example, when condensation occurs in the inner box back space 601, the condensation can be suppressed by sealing the boundary between the

side molding urethane

110a, 110b and the rear molding urethane 111. FIG.

Next, Example 7 will be described with reference to FIG. FIG. 10 is a cross-sectional view on the ZX plane of a refrigerator box according to Embodiment 7 of the present invention. The same reference numerals are assigned to the same configurations as those of the first embodiment, and detailed description thereof will be omitted.

In the box body 700, the outer box rear portion 102c and the outer

box side portions

102a and 102b are screwed together with

screws

701 and 702. The tips of the

screws

701 and 702 are positioned in the inner wall space 107 of the box body and are exposed. It is not necessary to protect the tip with a cover or the like. That is, in the structure in which the plates are joined together to form the outer case, the outer case can be formed by simply screwing the plates together at several locations without gluing the entire surfaces of the plates together.

By adopting each of the above-described embodiments, it is possible to reduce the thickness of the box wall to an arbitrary thickness while securing the rigidity and heat insulation of the box with a configuration without urethane foam in the box wall. becomes possible. In addition, since the urethane foaming process can be omitted when manufacturing the box body, the jigs and process costs can be reduced, contributing to a reduction in manufacturing costs. This structure can be generally applied to various boxes having a heat insulating function in addition to refrigerators.

[Effects of each embodiment]
In the structure according to each of the above-described embodiments, heat insulating properties of the box can be ensured by arranging the heat insulating member on the outer side of the inner box. This heat insulating member is not formed by foaming urethane during the box manufacturing process, but is, for example, preformed and processed block-shaped urethane or styrene.

In addition, by joining this heat insulating member to the inner box and using the heat insulating member as a reinforcing member, the rigidity of the box can be improved. In particular, it is possible to effectively improve the rigidity of the box by joining heat insulating members to both side surfaces of the inner box, which contribute greatly to the rigidity of the box. Since cooling parts such as heat radiation pipes are installed between the outer casing and the heat insulating member, the entire space between them is a space.

In addition, on the lower back side of the inner box, there is a machine room space where cooling equipment such as a compressor is installed. Since the inner box is not directly connected to the outer box, which is installed on the floor, the inner box may sink downward due to the weight inside the refrigerator. This deformation can be suppressed by installing a member. By arranging this support member on the front side of the machine room space, it is possible to reduce the moment against the weight inside the refrigerator.

In a structure having urethane foam, it is necessary to consider the fluidity of urethane in the urethane foaming process, and there is generally a limit to how thin the box wall can be made. Since there is no urethane foam inside the body wall, it is possible to reduce the thickness of the box wall to an arbitrary thickness. In addition, since the urethane foaming process can be omitted when manufacturing the box body, the jigs and process costs can be reduced, contributing to a reduction in manufacturing costs.

In addition to refrigerators, this structure can be universally applied to various boxes with heat insulation functions.

DESCRIPTION OF SYMBOLS 100... Box, 101... Inner box, 102... Outer box, 102a, 102b... Outer box side part, 102c... Outer box back part, 102d... Outer box bottom part, 103... Top plate, 104... Leg part, 105... Machine Chamber space 106 Support member for inner box 107 Space inside wall of

box body

110, 110a, 110b Side surface molded urethane 111 Back surface molded urethane 112 Top surface molded urethane 113 Bottom surface molded urethane, 114 Machine room upper molded urethane 115 Machine room front molded urethane 116 Front edge of box body 200 Box body 206 Inner box support member 300 Box body 301 Reinforcing member 306 Inner box Support member 400

Box body

401, 402, 403, 404 Reinforcement column 500

Box body

510, 510a, 510b Side

part molding urethane

511, 511a, 511b Insertion reinforcing member 600 Box body , 601... back space of inner box, 700... box body, 701, 702... screw

Claims

A box body comprising an inner box and an outer box arranged outside the inner box, a machine room space formed below the back side of the box body, and joined to at least both sides of the outer side of the inner box. a side heat insulating member,
A space is provided between the outer case and the side heat insulating member,
A heat insulating box, comprising a support member supporting the inner box in front of the machine room space.
A box body comprising an inner box and an outer box arranged outside the inner box, a machine room space formed below the back side of the box body, and joined to at least both sides of the outer side of the inner box. a side heat insulating member,
A space is provided between the outer case and the side heat insulating member,
A support member for supporting the inner box is provided in front of the machine room space,
A heat insulating box body, wherein one end of said support member is connected to said inner case and the other end is connected to said outer case.
A box body comprising an inner box and an outer box arranged outside the inner box, a machine room space formed below the back side of the box body, and a lower back side of the outer box facing the inner box. a bottom portion of the outer box that is bent to form an upper portion of the machine room space; side heat insulating members that are joined to at least both side surfaces of the outer side of the inner box; A machine room upper heat insulating member joined to the inner box,
A space is provided between the outer box and the heat insulating member joined to the outer side of the inner box,
A support member for supporting the inner box is provided in front of the machine room space,
A heat insulating box body, wherein one end of said support member is connected to said outer box bottom and the other end is connected to said outer case.
In any one of claims 1 to 3,
A bottom heat insulating member arranged on the bottom side of the inner box,
A heat insulating box body, wherein the bottom heat insulating member is connected to the inner box and the outer box.
In any one of claims 1 to 3,
A reinforcing member is provided behind the machine room space,
A heat insulating box body, wherein the reinforcing member is connected to the outer box.
In any one of claims 1 to 3,
A heat insulating box, wherein the inner box and the outer box are connected at a front edge located on the front side of the box.
In any one of claims 1 to 3,
The box is formed in a rectangular shape when viewed from the height direction,
A heat insulating box, characterized in that reinforcing columns connected to the outer box and extending in a height direction are provided at four corners of the box.
In any one of claims 1 to 3,
A heat insulating box body, wherein a reinforcing member is inserted inside the side heat insulating member.
In any one of claims 1 to 3,
A heat insulating box body, wherein a rear heat insulating member is disposed on the rear surface of the inner box, and the rear heat insulating member is not joined to the inner box.
In any one of claims 1 to 3,
A heat-insulating box body, wherein the outer box side part and the outer box back part constituting the outer box are joined by screws, and the tip of the screw is positioned in the space.
A refrigerator comprising the heat insulating box body according to any one of claims 1 to 10.