JP2009121694A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of easily positioning a vacuum heat insulating panel and reducing manufacturing cost. <P>SOLUTION: The refrigerator 1 includes a heat insulating housing 10 having an inner case 12 opened at its front face and formed in a state of partitioning a refrigerating compartment 2 and a freezing compartment 3, an outer case 11 covering an outer side of the inner case 12, foam insulation filled between the inner case 12 and the outer case 11, and a vacuum heat insulating panel 21 constituted by covering a core material 25 with a shell material 26, and decompressing the inside, and disposed between the inner case 12 and the outer case 11. The vacuum heat insulating panel 21 has a first contact portion 21a kept into contact with the inner case 12 and facing the refrigerating compartment 2, and a second contact portion 21b facing the refrigerating compartment 3, the refrigerating compartment 2 is projected to an outer case 11 side with respect to the freezing compartment 3, a thickness of the first contact portion 21a is thinner than the second contact portion 21b, and a step portion 21c between the first and second contact portions 21a, 21b is kept into contact with a peripheral portion of the refrigerating compartment 2. <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. This refrigerator has a vacuum heat insulation panel in a heat insulation box forming a main body casing. The heat insulating box is filled with a heat insulating material such as urethane foam between the outer box and the inner box, and a freezer compartment and a refrigerator compartment partitioned by the inner box are formed. The vacuum heat insulation panel is disposed in contact with the outer box, and a core material made of an organic foam such as urethane foam is covered with a jacket material, and the inside is decompressed. Thereby, a refrigerator with a high heat insulation effect can be obtained.

  The vacuum heat insulation panel is formed so that the portion facing the freezer compartment is thicker than the portion facing the refrigerator compartment. For this reason, the heat penetration | invasion to a low-temperature freezer compartment can be made small, and the heat insulation of a refrigerator can be improved more.

Japanese Utility Model Publication No. 1-1112391 (pages 1-10, FIG. 6) Japanese Utility Model Publication No. 1-58087 (1st page-6th page, Fig. 2)

  However, according to the conventional refrigerator, the vacuum heat insulation panel is provided in contact with the outer box. For this reason, when the alignment precision of a vacuum heat insulation panel falls, a thin part will face a freezer compartment, and heat insulation performance will fall. Accordingly, there is a problem that man-hours increase because the alignment of the vacuum heat insulation panel is performed with high accuracy, and the manufacturing cost of the refrigerator is increased.

  An object of the present invention is to provide a refrigerator capable of easily aligning a vacuum heat insulating panel and reducing manufacturing costs.

  To achieve the above object, the present invention provides an inner box that is formed by opening a front face and partitioning a refrigerator compartment and a freezer compartment, an outer box that covers the outer side of the inner box, the inner box, and the outer box. A heat insulating box body having a foam heat insulating material filled between the inner box and a vacuum insulating panel which is covered with a jacket material and whose inside is decompressed and which is disposed between the inner box and the outer box. In the refrigerator provided, the vacuum heat insulation panel has a first contact portion that contacts the inner box and faces the refrigerator compartment, and a second contact portion that faces the freezer compartment, and the refrigerator compartment is the The first abutting portion is thinner than the second abutting portion, and the step between the first and second abutting portions is formed on the peripheral portion of the refrigerator compartment. It is characterized by abutting.

  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 abuts on the inner box, and the refrigerating room protrudes, for example, toward the back side from the freezing room. The thin first contact portion of the vacuum heat insulating panel contacts the rear surface of the protruding refrigerator compartment, and the thick second contact portion contacts the rear surface of the freezer compartment disposed in front of the refrigerator compartment. The step between the first and second abutting portions abuts, for example, the lower end of the back of the refrigerator compartment, and the vacuum heat insulation panel is positioned.

  Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the core material is formed by laminating plate-like members formed of a fibrous material.

  In the refrigerator having the above-described configuration, the vacuum heat insulation panel is provided on each of the side surface and the back surface of the inner box, and the adjacent second contact portions of the vacuum heat insulation panel are in contact with each other. According to this configuration, for example, the horizontal width of the vacuum heat insulation panel disposed on the back surface of the inner box is formed wider than the freezer compartment, and is disposed on the front surface of the second contact portion of the vacuum heat insulation panel and the side surface of the inner box. The end surface of the second contact portion of the vacuum heat insulation panel contacts.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the stepped portion has an inclined surface. According to this configuration, the stock solution of the foam heat insulating material flows into the heat insulating wall that partitions the refrigerator compartment and the freezer compartment through the gap formed between the adjacent vacuum heat insulating panels by the inclined surface.

  According to the present invention, since the thickness of the first contact portion of the vacuum heat insulation panel that contacts the inner box is thinner than that of the second contact portion, it is possible to reduce the heat intrusion into the low-temperature freezer compartment, and the heat insulation effect. A high refrigerator can be obtained. Moreover, since the vacuum heat insulation panel abuts on the inner box and the step between the first and second contact parts abuts on the peripheral portion of the refrigerator compartment, the vacuum heat insulation panel can be easily positioned. Therefore, the manufacturing cost of the refrigerator can be reduced.

  Further, according to the present invention, the core material is formed by laminating the plate-like members formed from the fibrous material, so that it is possible to easily realize the vacuum heat insulation panel having the first and second contact portions having different thicknesses. . Moreover, since the core material is made of a fibrous material, there are more voids than an organic foam such as urethane foam, and the vacuum heat insulation performance can be further improved.

  Moreover, according to this invention, since the 2nd contact part of the vacuum heat insulation panel each provided in the side surface and the back surface of an inner box contacts, the coverage of a vacuum heat insulation panel increases and it can improve the heat insulation of a refrigerator more. .

  Further, according to the present invention, since the step portion between the first and second contact portions is inclined, the thin first contact portion is reinforced by the step portion, thereby improving the strength of the vacuum heat insulating panel. Accordingly, it is possible to reduce damage during transportation of the vacuum heat insulation panel. In addition, the stock solution of the foam heat insulating material flows into the heat insulating wall that partitions the refrigerator compartment and the freezer compartment through a gap formed between adjacent vacuum heat insulating panels by the inclined surface. Thereby, the heat insulation fall by the insufficient filling of the foam heat insulating material in a heat insulation wall can be prevented.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a perspective view of a refrigerator according to an embodiment. The refrigerator 1 has a heat insulating box 10 that forms a main body housing, and a refrigerator compartment 2 and a freezer compartment 3 that are partitioned by a heat insulating wall 10a that is integral with the heat insulating box 10 are arranged side by side. The front surfaces of the refrigerator compartment 2 and the freezer compartment 3 are opened and closed by doors 2a and 3a, respectively.

  2 and 3 show a side sectional view and a top sectional view of the heat insulation box 10. The heat insulating box 10 of the refrigerator 1 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. 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 outer box 11 is formed by joining a side plate 11a, a back plate 11b, and a bottom plate (not shown) 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 forms a heat insulating wall 10a to separate the refrigerator compartment 2 and the freezer compartment 3 from each other. The back surface of the refrigerator compartment 2 protrudes from the back surface of the freezer compartment 3 by the width D toward the outer box 11 side, and both side surfaces of the refrigerator compartment 2 protrude from the both sides of the freezer compartment 3 by the width W toward the outer box 11 side. To do. Thereby, the area of the cross section of the refrigerator compartment 2 is wider than the freezer compartment 3.

  The vacuum heat insulation panel 21 is disposed in contact with the back surface of the inner box 12, and the vacuum heat insulation panel 22 is disposed in contact with both side surfaces of the inner box 12.

  FIG. 4 is a cross-sectional view showing a part of the vacuum heat insulation panel 21. The vacuum heat insulation panel 22 is configured similarly to the vacuum heat insulation panel 21. The vacuum heat insulation panel 21 encloses the core material 25 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 core member 25 is formed by laminating plate members 25a to 25e formed from a fibrous material such as glass wool. As will be described in detail later, the vacuum heat insulation panel 21 has first and second contact portions 21a and 21b having different thicknesses. The first contact portion 21a is formed by stacking plate members 25a, 25b, and 25c, and the second contact portion 21b is formed by stacking plate members 25d and 25e.

  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.

  2 and 3, a thin first contact portion 21 a facing the back surface of the refrigerator compartment 2 is formed on the upper portion of the vacuum heat insulating panel 21. A second abutting portion 21b that is thicker than the first abutting portion 21a is formed below the vacuum heat insulating panel 21 so as to face the back surface of the freezer compartment 3. Since the back surface of the refrigerator compartment 2 protrudes with respect to the back surface of the freezer compartment 3, the first and second contact portions 21a and 21b having different thicknesses contact the refrigerator compartment 2 and the freezer compartment 3, respectively. A step portion 21c having an inclined surface on the inner box 12 side is formed between the first and second contact portions 21a and 21b.

  Similarly, the vacuum heat insulation panel 22 is formed with a thin first contact portion 22a (see FIG. 5) facing the side surface of the refrigerator compartment 2 at the upper portion. A second abutting portion 22b (see FIG. 5) thicker than the first abutting portion 22a is formed on the lower portion of the vacuum heat insulating panel 22 so as to face the side surface of the freezer compartment 3. Since the side surface of the refrigerator compartment 2 protrudes from the side surface of the freezer compartment 3, the first and second contact portions 22 a and 22 b having different thicknesses are in contact with the refrigerator compartment 2 and the freezer compartment 3, respectively. A step portion 22c (see FIG. 5) is formed between the first and second contact portions 22a and 22b.

  Further, the front end of the vacuum heat insulation panel 22 is arranged behind the front end of the inner box 12, and a gap 24 a is formed on the front side of the vacuum heat insulation panel 22.

  FIG. 5 is a perspective view showing the arrangement of the vacuum heat insulation panels 21 and 22. The vacuum heat insulation panel 21 arranged on the back surface of the inner box 12 is formed wider than the refrigerator compartment 2. The front surface of the second contact portion 21 b of the vacuum heat insulation panel 21 is in contact with the side end surface of the second contact portion 22 b of the vacuum heat insulation panel 22 disposed on the side surface of the inner box 12. Thereby, the wide range of the refrigerator compartment 2 and the freezer compartment 3 can be covered with the vacuum heat insulation panels 21 and 22.

  The step portions 21c and 22c between the first contact portions 21a and 22a and the second contact portions 21b and 22b are formed with inclined surfaces on the inner box 12 side. For this reason, the lower end which is the peripheral part of the back surface of the refrigerator compartment 2 contact | abuts with the upper end of step part 21c, 22c. Thereby, the clearance gap 24b connected between the bottom face of the refrigerator compartment 2 which forms the heat insulation wall 10a, and the upper surface of the freezer compartment 3 is formed in the both ends of the step part 21c. In addition, when the peripheral part of the outer surface of the refrigerator compartment 2 is a curved surface, the inclined surface of the step parts 21c and 22c contacts the curved surface part of the refrigerator compartment 2.

  When the heat insulating box 10 is assembled, the inner box 12 is installed so that the front side is downward, and the vacuum heat insulating panels 21 and 22 are attached to the inner box 12 with an adhesive tape or the like. At this time, the stepped portions 21c and 22c abut against the peripheral portion of the refrigerator compartment 2, and the vacuum heat insulating panels 21 and 22 are positioned. Then, the outer box 11 is covered from above, and the stock solution of the foam heat insulating material 13 is injected through an inlet (not shown) provided on the back surface of the outer box 11.

  The stock solution of the foam heat insulating material 13 injected from the inlet flows along the outer surface side of the vacuum heat insulating panels 21 and 22. Moreover, the undiluted | stock solution of the foam heat insulating material 13 flows in between the refrigerator compartment 2 and the freezer compartment 3 through the clearance gap 24b, as shown by the arrow A (refer FIG. 5). Further, the stock solution of the foam heat insulating material 13 flows between the refrigerator compartment 2 and the freezer compartment 3 through the gap 24 a in front of the vacuum heat insulating panel 22. The foam heat insulating material 13 is foamed by reaction, and is filled between the inner box 12 and the outer box 11 and into the heat insulating wall 10a.

  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 this embodiment, since the thickness of the first contact portions 21a and 22a of the vacuum heat insulation panels 21 and 22 that contact the inner box 12 is thinner than the second contact portions 21b and 22b, The heat intrusion can be reduced, and the refrigerator 1 having a high heat insulating effect can be obtained. Further, since the step portions 21c and 22c between the first contact portions 21a and 22a and the second contact portions 21b and 22b contact the peripheral portion of the refrigerator compartment 2, the vacuum heat insulation panels 21 and 22 are easily positioned. can do. Therefore, the manufacturing cost of the refrigerator 1 can be reduced.

  Further, since the core member 25 of the vacuum heat insulating panels 21 and 22 is formed by laminating plate members 25a to 25e formed of a fibrous material, the first contact portions 21a and 22a and the second contact portion 21b having different thicknesses are used. , 22b can be easily realized. Further, since the core material 25 is made of a fibrous material, there are more voids than an organic foam such as urethane foam, and the vacuum heat insulating performance can be further improved.

  Further, since the second contact portion 21b of the vacuum heat insulation panel 21 provided on the back surface of the inner box 12 and the second contact portion 22b of the vacuum heat insulation panel 22 provided on the side surface are in contact with each other, the coating with the vacuum heat insulation panels 21 and 22 is performed. A rate increases and the heat insulation of the refrigerator 1 can be improved more.

  At this time, since the step portions 21c and 22c are inclined, the thin first contact portions 21a and 22a are reinforced by the step portions 21c and 22c, and the strength of the vacuum heat insulating panels 21 and 22 is improved. Accordingly, it is possible to reduce breakage during transport of the vacuum heat insulating panels 21 and 22. In addition, the stock solution of the foam heat insulating material 13 flows into the heat insulating wall 10 a that partitions the refrigerator compartment 2 and the freezer compartment 3 through the gap 24 b formed by the inclined surface. Thereby, the heat insulation fall by insufficient filling of the foam heat insulating material in the heat insulation wall 10a can be prevented.

  In addition, when the undiluted | stock solution of the foam heat insulating material 13 spreads enough in the heat insulation wall 10a via the front end of the vacuum heat insulation panel 22, you may form the step parts 21c and 22c by a horizontal surface. Thereby, the step parts 21c and 22c which consist of a horizontal surface contact | abut to the peripheral part by the side of the bottom face of the refrigerator compartment 2, and the vacuum heat insulation panels 21 and 22 are positioned.

  Moreover, although the back surface and both sides | surfaces of the inner box 12 are covered with the vacuum heat insulation panels 21 and 22, the refrigerator 1 which covers one surface or two surfaces may be sufficient. In this case as well, the vacuum heat insulation panels 21 and 22 can be easily positioned.

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

The perspective view which shows the refrigerator of embodiment of this invention Side surface sectional drawing which shows the heat insulation box of the refrigerator of embodiment of this invention Top surface sectional drawing which shows the heat insulation box of the refrigerator of embodiment of this invention Sectional drawing which shows the vacuum heat insulation panel of the refrigerator of embodiment of this invention The perspective view which shows arrangement | positioning of the vacuum heat insulation panel of the refrigerator of embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Freezing room 10 Heat insulation box 10a Heat insulation wall 11 Outer box 12 Inner box 13 Foam heat insulation materials 21 and 22 Vacuum heat insulation panels 21a and 22a 1st contact part 21b and 22b 2nd contact part 21c and 22c Stepped portion 24a, 24b Clearance 25 Core material 26 Outer material

Claims (4)

  An inner box that is formed by partitioning the refrigerator compartment and the freezer compartment by opening the front surface, an outer box that covers the outside of the inner box, and a foam insulation material that is filled between the inner box and the outer box, In a refrigerator including a heat insulating box body having a vacuum heat insulating panel disposed between the inner box and the outer box while the core is covered with a jacket material and the inside is decompressed, the vacuum heat insulating panel is A first abutting portion that contacts the inner box and faces the refrigerator compartment and a second abutting portion that faces the freezer compartment, and the refrigerator compartment projects toward the outer box relative to the freezer compartment And the thickness of the 1st contact part is thinner than the 2nd contact part, and the step part between the 1st and 2nd contact parts contact | abuts to the surrounding part of the said refrigerator compartment.   The refrigerator according to claim 1, wherein the core material is formed by laminating plate-like members formed of a fibrous material.   The refrigerator according to claim 1 or 2, wherein the vacuum heat insulation panel is provided on each of a side surface and a back surface of the inner box, and a second contact portion of the adjacent vacuum heat insulation panel is in contact.   The refrigerator according to claim 3, wherein the stepped portion has an inclined surface.

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