JP2019015472A - Vacuum heat insulation housing and refrigerator - Google Patents

Abstract

To provide a vacuum heat insulation housing which enables reduction of deterioration of heat insulation performance.SOLUTION: A vacuum heat insulation housing 10 includes: a vacuum heat insulation material 40; an inner box part 20 which has an opening and houses the vacuum heat insulation material 40 in an internal space; and an outer box part 30 which covers the opening of the inner box part 20. The vacuum heat insulation material 40 has: a core material 41; a recessed member 42 which forms a recessed shape having an opening and houses the core material 41 in an internal space; and a sealing member 43 which covers the opening of the recessed member 42. A flange 45 extending outward along an opening surface of the opening is formed at an edge part of the opening of the recessed member 42, and the sealing member 43 is joined to the flange 45 at a peripheral edge part. The inner box part 20 has a housing part 24 which houses a joint part 46 between the flange 45 and the peripheral edge part of the sealing member 43.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vacuum heat insulating casing and a refrigerator.

  Conventionally, as an example using a vacuum heat insulating casing, for example, refrigerators shown in Patent Documents 1 and 2 are known. This refrigerator has a heat insulating box with a vacuum heat insulating material sandwiched between an inner box and an outer box, and the vacuum heat insulating material is configured by vacuum-packing an inorganic core material with an outer packaging film. This outer packaging film is larger than the core material, and the remaining portion around the periphery is bonded. Since this adhesion part protrudes outward larger than the outer edge of the core material, the vacuum heat insulating material is stored by folding the adhesion part of the outer packaging film in the inner space of the inner box and the outer box.

JP 2013-170765 A JP 2013-119980 A

  In the refrigerators of Patent Documents 1 and 2, the adhesive part of the outer film of the vacuum heat insulating material is folded. For this reason, it is easy to produce peeling of an adhesion part, and we are anxious about the fall of the heat insulation performance of the vacuum heat insulating material by peeling. In addition, when the inorganic core material is coated with a coating material that is less flexible than the outer packaging film, the coating material may be damaged at the bent portion, and there is a concern that the heat insulation performance of the vacuum heat insulating material may be deteriorated due to the damage. The

  This invention is made | formed in view of the said subject, and it aims at providing the vacuum heat insulation housing | casing which can reduce the fall of heat insulation performance.

  The vacuum heat insulation housing according to the first aspect of the present invention includes a vacuum heat insulating material, an opening, and an inner box portion that houses the vacuum heat insulating material in an internal space, and an opening portion of the inner box portion. The vacuum heat insulating material is formed of a core material, a concave member having an opening and accommodating the core material in the internal space, and a seal that covers the opening of the concave member. A flange projecting outwardly along the opening surface of the opening is formed at the edge of the opening of the concave member, and the sealing member is It is joined to a flange, and the inner box portion has a housing portion that houses a joint portion between the flange and the peripheral portion of the sealing member.

  The vacuum heat insulating housing according to a second aspect of the present invention is the vacuum heat insulating casing according to the first aspect, wherein the accommodating part is formed in a step shape so as to accommodate the peripheral part of the joint part and the outer box part, You may have the level | step difference surface which covers at least one part of an end surface and the end surface of the peripheral part of the said outer case part.

  The vacuum heat insulation housing | casing which concerns on the 3rd aspect of this invention WHEREIN: The said outer box part may extend outward rather than the outer edge of the said junction part, and may cover the said junction part in the 1st or 2nd aspect.

  The refrigerator which concerns on the 4th aspect of this invention is equipped with the vacuum heat insulation housing | casing of the aspect in any one of 1st-3rd.

  According to the vacuum heat insulating casing of the present invention, it is possible to reduce the deterioration of the heat insulating performance.

FIG. 1 is a cross-sectional view schematically showing a refrigerator provided with the vacuum heat insulating casing according to the first embodiment as a drawer door. FIG. 2 is a perspective view of the drawer door of FIG. 1 viewed from the front side. FIG. 3 is a perspective view of the drawer door of FIG. 1 viewed from the back side. FIG. 4 is a cross-sectional view showing the vacuum heat insulating housing of FIG. FIG. 5 is a cross-sectional view showing a part of the vacuum heat insulating housing of FIG. FIG. 6 is a cross-sectional view showing a vacuum heat insulating casing according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Moreover, in all drawings, the component for demonstrating this invention is extracted and shown in figure, and illustration may be abbreviate | omitted about another component. Furthermore, the present invention is not limited to the following embodiments.

(Embodiment 1)
Hereinafter, an example of the vacuum heat insulating casing 10 according to the first embodiment will be described with reference to FIGS. Hereinafter, although the case where the vacuum heat insulation housing | casing 10 is applied to the drawer door 12 of the refrigerator 11 is demonstrated, the vacuum heat insulation housing | casing 10 is not limited to this.

  As shown in FIGS. 1 to 3, the drawer door 12 includes a vacuum heat insulating housing 10, a gasket 13, and a frame 14, and is provided in a front opening of the main body of the refrigerator 11 so that it can be pulled out. The vacuum heat insulating casing 10 has a case, and the case is constituted by an inner box part 20 and an outer box part 30. The outer surface of the outer box part 30 constitutes the outer surface of the vacuum heat insulating casing 10 that always appears outside from the front opening of the main body of the refrigerator 11.

  The inner box portion 20 has a wall portion 21 and a frame portion 22, and the outer surface of the wall portion 21 constitutes the inner surface of the vacuum heat insulating housing 10 that appears in the internal space (inside the cabinet) of the main body of the refrigerator 11. A groove portion 23 is provided on the outer surface of the wall portion 21, and the gasket 13 is fitted in the groove portion 23, whereby the gasket 13 is attached to the inner box portion 20. A mounting member such as a frame 14 is fixed to the outer surface of the inner box portion 20 by a fixing tool such as a screw 15.

  As shown in FIG. 4, the vacuum heat insulating housing 10 includes an inner box part 20, an outer box part 30, and a vacuum heat insulating material 40. The outer box portion 30 has a rectangular flat plate shape and is formed of a glass plate or the like. The outer box part 30 is attached to the inner box part 20 so as to close the opening of the inner box part 20, and the inner space of the case constituted by the inner box part 20 and the outer box part 30 is closed. The vacuum heat insulating material 40 is accommodated in this internal space.

  The vacuum heat insulating material 40 has a first main surface, a second main surface, and side surfaces. The first main surface is opposed to the inner surface of the wall portion 21 of the inner box portion 20 and has a shape along the irregularities of the wall portion 21 such as the groove portion 23. The second main surface is a surface on the side opposite to the first main surface, is formed flat, and faces the inner surface of the outer box portion 30. The side surface is a surface connecting the second main surface and the first main surface and faces the inner surface of the frame portion 22 of the inner box portion 20. The internal space of the case constituted by the inner box part 20 and the outer box part 30 is filled with a vacuum heat insulating material 40.

  The vacuum heat insulating material 40 includes a core material 41 and a covering material that covers the core material 41, and the inside is sealed under reduced pressure. For example, the covering material includes, for example, a concave member 42 and a sealing member 43, and the core material 41 and the adsorbent 44 are disposed in this internal space.

  The sealing member 43 is a rectangular film and is configured to seal the opening of the concave member 42. For example, the sealing member 43 may be a laminate film such as a thermoplastic resin, and the laminate film may have a metal layer such as aluminum or stainless steel.

  The concave member 42 is a molded product produced by vacuum molding, injection molding, pressure molding, press molding or the like in accordance with the inner surface shape of the inner box portion 20. The concave member 42 is formed of a multilayer sheet in which a plurality of soft material layers such as ethylene-vinyl alcohol copolymer resin are laminated, which are softer than the material of the inner box portion 20. Thereby, the concave member 42 can be attached to the inner surface of the inner box part 20 when being accommodated in the inner box part 20.

  The concave member 42 is a concave shape having an opening, accommodates the core material 41 in the internal space, and has a flange 45. The flange 45 projects outward from the edge of the opening of the concave member 42 along the opening surface of the opening. The flange 45 is joined to the peripheral edge of the sealing member 43 by heat welding or the like, and the opening is sealed by the sealing member 43. Since the sealing member 43 can be pressed in a planar shape by the flange 45, a strong seal can be achieved between the sealing member 43 and the concave member 42.

  The core material 41 is made of open-cell urethane foam, glass fiber, rock wool, alumina fiber, polyethylene terephthalate fiber, or the like. The open-cell urethane foam may have, for example, the characteristics disclosed in Japanese Patent No. 5310928. Examples of the adsorbent 44 include a moisture adsorbent that adsorbs and removes moisture and a gas adsorbent that adsorbs a gas such as atmospheric gas. The adsorbent 44 is fitted into a hole provided in the core material 41. In a state where the adsorbent 44 is fitted in the hole of the core member 41, they are formed in the same shape as the inner surface (internal space) of the concave member 42.

  The inner box portion 20 is made of resin, has a box shape that opens to the front, and has an opening. The inner box part 20 is integrally formed with a wall part 21 and a frame part 22 by injection molding or the like, and accommodates the vacuum heat insulating material 40 in an inner space surrounded by these parts. The wall portion 21 has a rectangular shape, and a groove portion 23 is provided on the outer surface of the wall portion 21, and the groove portion 23 is provided in an annular shape along the end of the wall portion 21.

  The frame portion 22 has a cylindrical shape whose base end is connected to the end of the wall portion 21 and rises from this end. In the leading edge portion of the frame portion 22, a housing portion 24 in which the peripheral portion of the outer box portion 30 and the joint portion 46 between the flange 45 and the peripheral portion of the sealing member 43 are housed is provided. Since the accommodating portion 24 is formed in the frame portion 22, the thickness (the dimension between the inner surface and the outer surface) of the frame portion 22 may be set to be greater than the thickness (the dimension between the inner surface and the outer surface) of the wall portion 21. .

  As shown in FIG. 5, the accommodating portion 24 is formed in a step shape that is recessed from the inner surface and the front end of the frame portion 22, a step surface that is recessed from the inner surface of the frame portion 22 (first step surface 25), and It has a step surface (second step surface 26) that is recessed from the tip of the frame portion 22. The first step surface 25 faces the end surface of the peripheral portion of the outer box portion 30 accommodated in the accommodating portion 24 and the end surface of the joint portion 46. The second step surface 26 is disposed so as to contact the joint portion 46 accommodated in the accommodating portion 24 and sandwich the joint portion 46 between the second step surface 26 and the outer box portion 30. The accommodating portion 24 extends in an annular shape along the edge of the opening of the inner box portion 20.

  The dimension between the inner surface of the inner box part 20 and the first step surface 25 of the accommodating part 24 is formed larger than the dimension of the flange 45 protruding from the edge of the opening of the concave member 42, and the accommodating part 24. The joint 46 between the flange 45 and the sealing member 43 is accommodated. Thereby, it is not necessary to bend the joining part 46, peeling of the joining part 46 is prevented, and the fall of the heat insulation performance of the vacuum heat insulating material 40 by peeling is reduced. Further, the dimension between the inner surface of the inner box part 20 and the first step surface 25 is formed such that the peripheral part of the outer box part 30 is accommodated in the accommodating part 24.

  The dimension between the front end of the inner box part 20 and the second step surface 26 of the accommodating part 24 is equal to or greater than the thickness of the joint part 46 and less than the total thickness of the joint part 46 and the peripheral part of the outer box part 30. is there. Accordingly, at least a part of the end surface of the joint portion 46 and the end surface of the outer box portion 30 is covered with the first step surface 25 of the housing portion 24.

  Thereby, since the junction part 46 is protected from external force by the accommodating part 24, peeling of the junction part 46 is prevented and the fall of the heat insulation performance of the vacuum heat insulating material 40 by peeling is reduced. Further, since the container 24 prevents foreign matter such as water and dust from entering between the flange 45 of the joint 46 and the sealing member 43, the vacuum heat insulating material 40 is deteriorated by the foreign matter and the joint 46 is peeled off. Is reduced. Furthermore, since the end face of the joining part 46 and the end face of the outer box part 30 do not appear outside, the design of the vacuum heat insulating casing 10 is improved.

  Moreover, since the outer case part 30 is protected from external force by the accommodating part 24, damage to the outer case part 30 is prevented, and the fall of the designability of the vacuum heat insulation housing | casing 10 is reduced. Furthermore, since the front end of the inner box part 20 does not protrude ahead of the outer box part 30, damage to the inner box part 20 is prevented, and a decrease in design of the vacuum heat insulating casing 10 is reduced.

  The dimension of the outer box part 30 is formed larger than the dimension of the outer edge 45 a of the flange 45. As a result, the outer box portion 30 accommodated in the accommodating portion 24 extends in the direction in which the flange 45 projects outward from the outer edge 45a of the joint portion 46 between the flange 45 and the sealing member 43, and the joint portion 46 is Covering. Thereby, the joining part 46 is protected by the outer box part 30, and peeling of the joining part 46 due to an external force from the outer box part 30 side and entry of foreign matter from the outer box part 30 side are prevented. Moreover, the junction part 46 cannot be seen from the outer box part 30 side, and the fall of the designability of the vacuum heat insulation housing | casing 10 is reduced.

  In the second embodiment, the frame portion 22 has a cylindrical shape, but the shape of the frame portion 22 is not limited to this. For example, a plurality of (in this embodiment, four) frame portions may be formed, and the four frame portions may be formed so as to rise from each of the four sides of the rectangular wall portion 21. Each frame portion may be joined to the wall portion 21 by a joining member such as an adhesive, or may be joined to the wall portion 21 by welding or the like without going through the joining member.

(Embodiment 2)
In the vacuum heat insulating casing 10 according to the second embodiment, as shown in FIG. 6, the frame portion 122 and the wall portion 21 of the inner box portion 20 are made of the same material and are integrated via a joining member 27. .

  Specifically, the frame portion 122 has a cylindrical shape made of resin, and is formed by injection molding or the like separately from the wall portion 21. The base end of the frame portion 122 is joined to the end of the wall portion 21 by a joining member 27 such as an adhesive, and rises from the end of the wall portion 21. The frame portion 122 and the wall portion 21 are integrated by the joining member 27 to form a box-shaped inner box portion 20.

  In the inner box part 20, the frame part 122 and the wall part 21 are joined by the joining member 27 so that the frame part 122 covers the end surface of the wall part 21. For this reason, the joining member 27 is located on the wall portion 21 side and on the inner surface of the vacuum heat insulating casing 10 inside the warehouse. Thereby, the joining member 27 is not conspicuous from a user, and the fall of the designability of the drawer door 12 is suppressed.

  For example, the frame portion 122 can be formed in a color different from that of the wall portion 21 and the same color as the color of the outer box portion 30. Further, the frame portion 122 covers the peripheral edge portion of the outer box portion 30 housed in the housing portion 24 and each end face of the joint portion 46 between the flange 45 and the sealing member 43. Thereby, the frame part 122 which comprises the side surface of the vacuum heat insulation housing | casing 10, and the outer case part 30 which comprises the outer surface of the vacuum heat insulation housing | casing 10 look continuously, and the designability improves.

  In the second embodiment, the wall portion 21 and the frame portion 122 are joined by the joining member 27 such as an adhesive, which is a separate member, but the joining method of the wall portion 21 and the frame portion 122 is the same. It is not limited to. For example, the wall portion 21 and the frame portion 122 may be joined without using the joining member 27 by welding or the like.

  Moreover, in the said Embodiment 2, although the frame part 122 was made into the cylinder shape, the shape of the frame part 122 is not limited to this. For example, a plurality of (in this embodiment, four) frame portions may be formed, and the four frame portions may be formed so as to rise from each of the four sides of the rectangular wall portion 21. Each frame portion may be joined to the wall portion 21 by a joining member such as an adhesive, or may be joined to the wall portion 21 by welding or the like without going through the joining member.

  Furthermore, in the said Embodiment 2, although the wall part 21 and the frame part 122 were formed with the same material, you may form these with a different material. For example, the frame portion 122 may be made of metal, and the wall portion 21 may be made of resin. Thus, since the freedom degree of selection of the frame part 122 and the wall part 21 increases, the improvement of the design property of the vacuum heat insulation housing | casing 10 by which a side surface and an inner surface are comprised can be further aimed at.

  From the above description, many modifications and other embodiments of the present invention are obvious to those skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the scope of the invention. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments.

  The vacuum heat insulating housing according to the present invention is useful as a vacuum heat insulating housing that can reduce a decrease in heat insulating performance.

10: Vacuum heat insulating casing 11: Refrigerator 20: Inner box 25: First step surface (step surface)
30: Outer box part 40: Vacuum heat insulating material 41: Core material 42: Concave member 43: Sealing member 45: Flange 45a: Outer edge 46: Joining part 24: Housing part 122: Frame part

Claims (4)

Vacuum insulation,
An inner box part having an opening and accommodating the vacuum heat insulating material in the internal space;
An outer box covering the opening of the inner box, and
The vacuum heat insulating material has a core material, a concave member that has a concave shape having an opening and accommodates the core material in an internal space, and a sealing member that covers the opening of the concave member,
A flange protruding outward along the opening surface of the opening is formed at the edge of the opening of the concave member, and the sealing member is joined to the flange at a peripheral edge,
The said inner box part is a vacuum heat insulation housing | casing which has the accommodating part which accommodates the junction part of the said flange and the peripheral part of the said sealing member.   The accommodating portion is formed in a step shape so as to accommodate the peripheral portion of the joint portion and the outer box portion, and the step surface covers at least a part of the end surface of the joint portion and the end surface of the peripheral portion of the outer box portion. The vacuum heat insulation housing | casing of Claim 1 which has.   The vacuum insulation case according to claim 1 or 2, wherein the outer box portion extends outward from an outer edge of the joint portion and covers the joint portion.   The refrigerator provided with the vacuum heat insulation housing | casing in any one of Claims 1-3.

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