JP2008267664A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving cost reduction and heat insulation. <P>SOLUTION: This refrigerator includes a heat insulating box body 10 having: an inner box 12 the front of which is opened; an outer box 11 covering the outside of the inner box 12; a foam heat insulating material 13 filling the space between the inner box 12 and the outer box 11; and vacuum heat insulating panels 21, 22 disposed between the inner box 12 and the outer box 11 the interior pressure of which is reduced by covering a core material 25 with an envelope material 25. The vacuum heat insulating panels 21, 22 are formed into U-shapes in a section to cover the side surfaces and the back of the inner box 12 by bending. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerator provided with a vacuum heat insulation panel in a heat insulation box.

  A conventional refrigerator is disclosed in Patent Document 1. FIG. 6 shows a top cross-sectional view of a heat insulating box forming the main body casing of the refrigerator. The heat insulating box 10 is formed by filling a foam heat insulating material 13 between the outer box 11 and the inner box 12 and dividing the plurality of cooling chambers 8 by the inner box 12. Flat heat insulating panels 20 fixed to the outer box 11 are provided on both side surfaces and the back surface of the heat insulating box 10.

  A gap 20a is provided around the vacuum heat insulation panel 20 on each surface. A passage for allowing the stock solution of the foam heat insulating material 13 to permeate is formed by the gap 20a. The stock solution of the foam heat insulating material 13 flows through the flow path, and the foam heat insulating material 13 is filled between the vacuum heat insulating panel 20 and the inner box 12. The heat insulation property of the heat insulation box 10 can be improved by the vacuum heat insulation panel 20.

Japanese Patent Laid-Open No. 2003-28562 (pages 3 to 6, FIG. 7)

  However, according to the conventional refrigerator, since the flat vacuum heat insulation panel 20 is provided on each surface of the heat insulation box 10, there is a problem that the number of parts is large and the cost of the refrigerator is increased. Moreover, since the clearance gap 20a for making the foam heat insulating material 13 permeate | penetrate is formed around each vacuum heat insulation panel 20, the coverage of the vacuum heat insulation panel 20 with respect to the surface area of the outer box 11 is low, and becomes about 55-60%. For this reason, there also existed a problem which cannot fully improve heat insulation.

  An object of this invention is to provide the refrigerator which can aim at a cost reduction and can increase the coverage of a vacuum heat insulation panel and can improve heat insulation.

  In order to achieve the above object, the present invention includes an inner box that opens at the front, an outer box that covers the outside of the inner box, a foam heat insulating material that is filled between the inner box and the outer box, and a core. In a refrigerator comprising a heat insulating box body having a vacuum heat insulating panel disposed between the inner box and the outer box while the inside is reduced in pressure by covering the material with a jacket material, the vacuum heat insulating panel is It is characterized by being folded so as to cover two adjacent sides of the box.

  According to this configuration, the vacuum heat insulation panel is disposed between the outer box and the inner box, and the foam heat insulating material is filled to form a heat insulation box. The vacuum heat insulation panel is bent and disposed so as to cover, for example, the side surface and the back surface of the inner box.

  In the refrigerator having the above-described configuration, the vacuum heat insulation panel is formed in an L-shaped cross section that covers a side surface and a back surface of the inner box.

  Further, the present invention provides the refrigerator having the above-described configuration, wherein a plurality of the vacuum heat insulation panels are provided, the left side surface of the inner box and the left back portion of the inner box are covered by the one vacuum heat insulation panel, and the inner space is provided by the other vacuum heat insulation panel. The right side of the box and the right side of the back are covered, and a gap is provided between them on the back side of the inner box. According to this configuration, the left and right L-shaped vacuum heat insulation panels are juxtaposed on the back side via a gap, and the foam insulation material circulates through the gap and foams on the inner box side and the outer box side of the vacuum heat insulation panel. Insulation is filled.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the vacuum heat insulation panel is arranged apart from the inner box and the outer box. According to this configuration, the foam heat insulating material is filled between the vacuum heat insulating panel and the inner box, and the foam heat insulating material is filled between the vacuum heat insulating panel and the outer box.

  In the refrigerator having the above-described configuration, the present invention is characterized in that a support member that is fixed to the inner box and supports the vacuum heat insulation panel is provided.

  In the refrigerator having the above configuration, the present invention further includes an inlet for injecting the stock solution of the foam heat insulating material on the back side of the outer box, and the vacuum heat insulating panel is separated from the front end of the inner box by a predetermined distance backward. It is characterized by the arrangement. According to this configuration, the stock solution of the foam heat insulating material is injected from the inlet on the back side of the outer box with the opening side of the inner box facing downward. The raw material of the foam insulation flowing down along the outer box side of the bent vacuum insulation panel flows into the inner box side of the vacuum insulation panel through the gap between the front end of the inner box and the front end of the vacuum insulation panel. .

  According to the present invention, since the vacuum heat insulation panel is bent so as to cover two adjacent surfaces of the inner box, the number of vacuum heat insulation panels arranged around the heat insulation box together with other vacuum heat insulation panels can be reduced. it can. Therefore, the cost of the refrigerator can be reduced. In addition, the total number of gaps for infiltrating the foam heat insulating material formed around each vacuum heat insulating panel is reduced. Therefore, the coverage of a vacuum heat insulation panel can be increased and the heat insulation of a heat insulation box can be improved.

  Further, according to the present invention, the vacuum heat insulation panel is formed in an L-shaped cross section covering the side surface and the back surface of the inner box, so that the foam heat insulating material penetrates the boundary between the side surface and the back surface of the heat insulation box having a long distance in the vertical direction. There is no need to form gaps. Therefore, the coverage of the vacuum heat insulating panel can be further increased. Moreover, since the L-shaped vacuum heat insulation panels can be easily stacked, handling during transportation and storage becomes easy.

  In addition, according to the present invention, an L-shaped vacuum heat insulation panel covering the left side of the inner box and the left rear portion, and an L-shaped vacuum heat insulation panel covering the right side of the inner box and the right rear portion. Therefore, the left and right vacuum insulation panels can be shared. Moreover, since the clearance gap was provided between both in the back side of the inner box, a foaming heat insulating material can be filled easily.

  According to the present invention, since the vacuum heat insulation panel is arranged away from the inner box and the outer box, the gap in which the foam heat insulating material flows between the outer box and the vacuum heat insulation panel provided with the inner box and the pipe having the unevenness on the back surface. It is possible to prevent the deterioration of the heat insulating property due to insufficient filling.

  According to the present invention, since the support member that is fixed to the inner box and supports the vacuum heat insulating panel is provided, the vacuum heat insulating panel can be easily separated from the inner box and the outer box.

  Further, according to the present invention, the back side of the outer box has an injection port for injecting a stock solution of foam heat insulating material, and the vacuum heat insulating panel is arranged at a predetermined distance away from the front end of the inner box. The stock solution of the foam insulation material injected from the injection port is spread to the inner box side of the vacuum insulation panel. Accordingly, it is possible to prevent a decrease in heat insulation due to insufficient filling of the foam heat insulating material.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a front sectional view and a top sectional view of a heat insulating box of the refrigerator according to the first embodiment. For convenience of explanation, the same reference numerals are given to the same parts as in the conventional example shown in FIG.

  The heat insulating box 10 of the refrigerator has a box shape with an open front. The outer surface of the heat insulation box 10 is formed by the outer box 11, and the inner surface is formed by the inner box 12. The outer box 11 is formed by joining a side plate 11a, a back plate 11b, and a bottom plate 11c (see FIG. 4) made of a metal plate such as an iron plate. The side plate 11 a bends the metal plate to form the top surface and both side surfaces of the outer box 11.

  The inner box 12 is made of a resin molded product, and is formed by dividing a plurality of cooling chambers 8 and 9 whose front surfaces are open. Vacuum heat insulating panels 21 and 22 are arranged between the outer box 11 and the inner box 12 and filled with a foam heat insulating material 13 such as urethane foam. The vacuum heat insulation panels 21 and 22 are formed in an L-shaped cross section. The vacuum heat insulation panel 21 covers the left side of the inner box 12 and the left part of the back, and the vacuum heat insulation panel 22 covers the right side of the inner box 12 and the right part of the back.

  FIG. 3 is a cross-sectional view showing a part of the vacuum heat insulation panels 21 and 22. The vacuum heat insulating panels 21 and 22 enclose a core material 25 such as glass fiber in a bag-like outer covering material 26. The inside of the jacket material 26 is depressurized by vacuuming with the core material 25 serving as a spacer, and the jacket material 26 is sealed with the end 26a in close contact. The vacuum heat insulating panels 21 and 22 are formed into a flat plate shape by a flat core member 25 and then bent into an L-shaped cross section by pressing or the like. Thereby, the vacuum heat insulation panels 21 and 22 can be easily formed in an L-shaped cross section.

  The jacket material 26 is composed of laminated films 27 and 28 whose ends are bonded to each other. In the laminated films 27 and 28, the surface protective layers 27a and 28a and the adhesive layers 27b and 28b are laminated through an intermediate layer (not shown). The surface protection layers 27a and 28a are made of nylon or the like, and are arranged on the outermost layer to protect the surface of the jacket material 26. The adhesive layers 27b and 28b are made of high density polyethylene (HDPE) or the like, and the end portions of the laminated films 27 and 28 are brought into close contact with each other by heat welding.

  The intermediate layer is formed by laminating first and second barrier layers (not shown). The first barrier layer is formed by coating polyvinyl chloride (PVC) resin on the surface of the base made of ethylene vinyl alcohol copolymer (EVOH) on which aluminum is deposited. Thereby, gas, such as a carbon dioxide and cyclopentane, can be shielded. The second barrier layer is made of polyester (PET) subjected to aluminum vapor deposition and shields gas such as water vapor. Thereby, a high barrier property is maintained.

  The front ends of the vacuum heat insulation panels 21 and 22 are arranged behind the front end of the inner box 12, and gaps 24a and 24b are formed on the front surfaces of the vacuum heat insulation panels 21 and 22, respectively. A gap 24 c is formed between the vacuum heat insulation panel 21 and the vacuum heat insulation panel 22 on the back side. The vacuum heat insulating panels 21 and 22 are attached to the support member 15 fixed to the side surface and the back surface of the inner box 12, and are disposed apart from the inner box 12 and the outer box 11.

  FIG. 4 is an exploded perspective view showing a state when the heat insulating box 10 is assembled. An inlet 16 for injecting a stock solution of the foam heat insulating material 13 is provided on the back side of the outer box 11. When filling the foam heat insulating material 13, the inner box 12 is installed so that the front side is downward, and the vacuum heat insulating panels 21 and 22 are attached onto the inner box 12 by the support member 15. By providing the support member 15 in the inner box 12, the vacuum heat insulation panels 21 and 22 can be easily installed. Then, the stock solution of the foam heat insulating material 13 is injected from the injection port 16 by covering the outer box 11 from above. The foam heat insulating material 13 is foamed by reaction and is filled between the inner box 12 and the outer box 11.

  At this time, the stock solution of the foam heat insulating material 13 injected from the injection port 16 flows down along the outer surfaces of the vacuum heat insulating panels 21 and 22. And the undiluted | stock solution of the foam heat insulating material 13 advances to the inner box 12 side through the clearance gaps 24a and 24b ahead of the vacuum heat insulation panels 21 and 22. FIG. Moreover, the undiluted | stock solution of the foam heat insulating material 13 which flows the back side of the vacuum heat insulation panels 21 and 22 advances to the inner box 12 side via the clearance gap 24c. Therefore, the foam heat insulating material 13 spreads to the inner box 12 side and the outer box 11 side of the vacuum heat insulating panels 21 and 22, and deterioration of heat insulation due to insufficient filling of the foam heat insulating material 13 can be prevented.

  A flat-plate vacuum heat insulation panel that covers the top surface of the inner box 12 may be provided separately, or a vacuum heat insulation panel that covers the bottom surface of the inner box 12 may be provided.

  According to the present embodiment, since the vacuum heat insulation panels 21 and 22 are bent so as to cover two adjacent surfaces (side surface and back surface) of the inner box 12, the number of vacuum heat insulation panels arranged around the heat insulation box 10. Can be reduced. Therefore, the cost of the refrigerator can be reduced. Further, the total number of gaps for allowing the foam heat insulating material 13 formed around the vacuum heat insulating panels 21 and 22 to permeate is reduced. Therefore, the coverage of the vacuum heat insulating panel can be increased to about 80%, and the heat insulating property of the heat insulating box 10 can be improved.

  Moreover, since the vacuum heat insulation panels 21 and 22 are formed in the L-shaped cross section which covers the side surface and back surface of the inner box 12, the foam heat insulating material 13 is formed at the boundary between the side surface and back surface of the heat insulation box 10 which is long in the vertical direction. It is not necessary to form a gap for infiltrating. Therefore, the coverage of the vacuum heat insulating panel can be further increased. Further, since the vacuum heat insulation panels 21 and 22 having L-shaped cross sections can be easily stacked, handling during transportation and storage is facilitated.

  Further, the L-shaped vacuum heat insulation panel 21 covering the left side of the inner box 12 and the left side of the back surface, and the L-shaped vacuum heat insulation panel 22 covering the right side of the inner box 12 and the right side of the back surface. Since the left and right vacuum heat insulation panels 21 and 22 can be made common. Moreover, since the clearance gap 24c was provided between both in the back side of the inner box 12, the foam heat insulating material 13 can be penetrate | infiltrated easily.

  Further, since the vacuum heat insulating panels 21 and 22 are arranged away from the inner box 12 and the outer box 11 by the support member 15, the inner box 12 having unevenness on the back surface and the outer box 11 and the vacuum heat insulating panels 21 and 22 provided with piping. It is possible to secure a sufficient gap through which the foamed heat insulating material 13 flows during this period to prevent a decrease in heat insulation due to insufficient filling.

  It should be noted that it is more desirable that the distance between the plane occupying a large area on the back side of the inner box 12 where the irregularities are formed and the vacuum heat insulation panels 21 and 22 be larger than the distance between the outer box 11 and the vacuum heat insulation panels 21 and 22. . Thereby, the clearance gap through which the foam heat insulating material 13 distribute | circulates between the convex part of the back side of the inner box 12, and the vacuum heat insulation panels 21 and 22 can fully be ensured, and the heat insulation fall can be prevented further.

  Next, FIG. 5 is a side sectional view showing a heat insulating box body of the refrigerator of the second embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. Between the inner box 12 and the outer box 11 of the heat insulation box 10 of the present embodiment, a vacuum heat insulation panel 23 having an L-shaped cross section that covers the top surface and the back surface of the inner box 12 is provided. Moreover, the flat vacuum heat insulation panel (not shown) which each covers the left and right side surfaces of the inner box 12 is provided. Other parts are the same as those in the first embodiment.

  Each vacuum heat insulation panel including the vacuum heat insulation panel 23 is supported by a support member 15 provided in the inner box 12 and is arranged apart from the inner box 12 and the outer box 11. A vacuum heat insulation panel that covers the bottom surface of the inner box 12 may be provided.

  According to the present embodiment, as in the first embodiment, the vacuum heat insulation panel 23 is bent so as to cover two adjacent surfaces (the top surface and the back surface) of the inner box 12, and thus includes the vacuum heat insulation panel covering the side surface. The number of vacuum heat insulation panels arranged around the heat insulation box 10 can be reduced. Therefore, the cost of the refrigerator can be reduced. Further, the total number of gaps for infiltrating the foam heat insulating material 13 formed around each vacuum heat insulating panel is reduced. Therefore, the coverage of a vacuum heat insulation panel can be increased and the heat insulation of the heat insulation box 10 can be improved.

  According to this invention, it can utilize for the refrigerator provided with the vacuum heat insulation panel in the heat insulation box.

Front sectional drawing which shows the heat insulation box of the refrigerator of 1st Embodiment of this invention. Top surface sectional drawing which shows the heat insulation box of the refrigerator of 1st Embodiment of this invention. Sectional drawing which shows the vacuum heat insulation panel of the refrigerator of 1st Embodiment of this invention. The disassembled perspective view which shows the heat insulation box of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing which shows the heat insulation box of the refrigerator of 2nd Embodiment of this invention. Top sectional view showing a heat insulation box of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Outer box 12 Inner box 13 Foam insulation 15 Support member 20, 21, 22, 23 Vacuum insulation panel 24a-24c Crevice

Claims (6)

  An inner box that opens the front, an outer box that covers the outer side of the inner box, a foam heat insulating material that is filled between the inner box and the outer box, and a core material that is covered with an outer jacket material to reduce the inside. And a refrigerator including a heat insulation box having a vacuum heat insulation panel disposed between the inner box and the outer box, and the vacuum heat insulation panel is folded so as to cover two adjacent surfaces of the inner box. A refrigerator characterized by bending.   The refrigerator according to claim 1, wherein the vacuum heat insulation panel is formed in an L-shaped cross section that covers a side surface and a back surface of the inner box.   A plurality of the vacuum heat insulation panels are provided, and the one heat insulation panel covers the left side of the inner box and the left part of the back, and the other vacuum heat insulation panel covers the right side of the inner box and the right part of the back. The refrigerator according to claim 2, wherein a gap is provided between the two on the back side of the inner box.   The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulation panel is arranged apart from the inner box and the outer box.   The refrigerator according to claim 4, further comprising a support member that is fixed to the inner box and supports the vacuum heat insulation panel.   The back side of the outer box has an injection port for injecting the stock solution of the foam heat insulating material, and the vacuum heat insulating panel is arranged at a predetermined distance rearward from the front end of the inner box. The refrigerator according to claim 5.

Images