JP2009162402A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator reducing costs and improving a heat insulating performance. <P>SOLUTION: This refrigerator has a heat insulating housing 10 having: an inner casing 12 opened at its front face; an outer casing 11 covering the outside of the inner casing 12; a foam insulation 13 which a space between the inner casing 12 and the outer casing 11 is filled with; and vacuum heat insulating panels 21, 22 obtained by covering a core material 25 with an outer package material 26 and reducing a pressure inside, and disposed between the inner casing 12 and the outer casing 11. The vacuum heat insulating panels 21, 22 have: back face portions 21a, 22a covering a back face of the inner casing 12; and side face portions 21b, 22b formed by bending one end of the back face portions 21a, 22a and covering side faces of the inner casing 12, and the back face portions 21a, 22a have through-holes 20 at bent-side end portions. <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. 9 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 filled with a foam heat insulating material 13 between the outer box 11 and the inner box 12, and a plurality of storage chambers 8 are vertically divided 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. The refrigerator is provided with a heat insulating box having a vacuum heat insulating panel disposed between the inner box and the outer box while the inside is decompressed by covering the material with an outer packaging material, and the vacuum heat insulating panel is the inner box And a side surface portion covering the side surface of the inner box by bending one end of the back surface portion, and the back surface portion has a through hole at the end portion on the bent side. It is said.

  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 arranged so that the back surface covers the back of the inner box and the side surface covers the side of the inner box. In the heat insulating box, the stock solution of the foam heat insulating material is injected from the back side of the outer box with the opening side of the inner box facing downward. The stock solution of the foam heat insulating material injected from the back side of the outer box flows between the inner box and the vacuum heat insulating panel through the through hole of the vacuum heat insulating panel.

  Further, the present invention is characterized in that, in the refrigerator configured as described above, an injection port for injecting the stock solution of the foam heat insulating material is provided at a side end portion on the back surface of the outer box, and the through hole is disposed to face the injection port. Yes. According to this configuration, the stock solution of the foam heat insulating material is injected from the injection port provided at the side end on the back side of the outer box with the opening side of the inner box facing downward. The through hole faces the injection port, and the injected stock solution of foam heat insulating material flows between the inner box and the vacuum heat insulation panel through the through hole.

  Further, the present invention provides the refrigerator having the above-described configuration, wherein the inlet is provided in a chamfered portion in which a corner between the back surface and the side surface of the outer box is chamfered, and an inclined portion that is inclined to face the chamfered portion is provided in the back surface portion. The through hole is provided in the inclined portion. According to this configuration, the stock solution of the foam heat insulating material is injected from the injection port provided in the chamfered portion on the back side of the outer box. A through hole provided in the inclined part facing the chamfered part faces the injection port, and the injected stock solution of foamed heat insulating material flows between the inner box and the vacuum heat insulating panel through the through hole.

  In the refrigerator having the above-described configuration, the vacuum heat insulation panel is characterized in that the back surface portion is separated from the outer box and the side surface portion is close to the outer box. According to this configuration, the through hole can be formed to open to the vicinity of the side surface of the outer box.

  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.

  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 vacuum heat insulation panels are arranged side by side through a gap on the back side, and the foam insulation material flows through the gap so that the foam insulation is provided on the inner box side and the outer box side of the vacuum heat insulation panel. Filled.

  According to the present invention, since the vacuum heat insulation panel is bent so as to cover the back and side 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. . Therefore, the cost of the refrigerator can be reduced. Moreover, it is not necessary to form a gap for allowing the foamed heat insulating material to permeate at the boundary between the side surface and the back surface of the heat insulating box that is long in the vertical direction. Therefore, the coverage of a vacuum heat insulation panel can be increased and the heat insulation of a heat insulation box can be improved.

  Furthermore, since the through hole is provided at the end of the back surface of the vacuum heat insulation panel, it is possible to easily distribute the stock solution of the foam heat insulating material injected from the back side of the outer box between the vacuum heat insulation panel and the inner box. it can. Accordingly, it is possible to prevent a decrease in heat insulation performance due to insufficient filling of the foam heat insulating material.

  Further, according to the present invention, since the through hole is arranged opposite to the injection port provided on the side end portion on the back surface of the outer box, the stock solution of the foam heat insulating material injected from the injection port is more reliably connected to the vacuum heat insulation panel and the inside. It can be distributed between boxes.

  Further, according to the present invention, since the inclined portion facing the chamfered portion having the injection port is formed at the end of the back surface portion of the vacuum heat insulating panel, the nozzle inserted into the injection port can be easily contacted with the back surface portion. It can be avoided.

  Further, according to the present invention, since the back surface portion of the vacuum heat insulating panel is separated from the outer box and the side surface portion is close to the outer box, the through hole can be opened widely to the vicinity of the side surface of the outer box. Therefore, the stock solution of the foam heat insulating material injected from the back side of the outer box can be more reliably distributed between the vacuum heat insulating panel and the inner box.

  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.

  Further, according to the present invention, the vacuum heat insulation panel that covers the left side of the inner box and the left side of the back and the vacuum heat insulation panel that covers the right side of the inner box and the right side of the back are provided. The panel can be shared. Moreover, since the clearance gap was provided between both on the back side of the inner box, the stock solution of the foam heat insulating material can be more reliably distributed between the vacuum heat insulating panel and the inner box.

  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 those 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 back plate 11a, a side plate 11b, and a bottom plate 11c (see FIG. 6) made of a metal plate such as an iron plate. The side plate 11b bends the metal plate to form the top surface and both side surfaces of the outer box 11. Chamfered chamfers 11d are formed at both ends of the back plate 11a. The chamfer 11d is provided with an inlet 16 (see FIG. 6) described later.

  The inner box 12 is made of a resin molded product, and is formed by dividing a plurality of storage 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 a substantially L-shaped cross section.

  The vacuum heat insulation panel 21 has a back surface portion 21 a that covers the left portion of the back surface of the inner box 12, and a side surface portion 21 b that covers the left side surface. The vacuum heat insulation panel 22 has a back surface portion 22a that covers the right portion of the back surface of the inner box 12, and a side surface portion 22b that covers the right side surface. Inclined portions 21c and 22c that are inclined to face the chamfered portion 11d are provided at the end portions of the back surface portions 21a and 22a on the side surface portions 21b and 22b side.

  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.

  The distance between the vacuum heat insulating panels 21 and 22 and the back plate 11a and the side plate 11b is secured about 8 mm. Thereby, the undiluted | stock solution of the foam heat insulating material 13 can distribute | circulate easily to the outer surface side of the vacuum heat insulation panels 21 and 22. FIG.

  FIG. 3 shows a development view of the vacuum heat insulation panel 21. 4 and 5 show the AA and BB sectional views of FIG. The vacuum heat insulation panel 22 is formed in the same manner as the vacuum heat insulation panel 21.

  The vacuum heat insulation panels 21 and 22 enclose a core material 25 such as glass fiber in a bag-like outer packaging material 26. The inside of the outer packaging material 26 is depressurized by evacuation, with the core material 25 serving as a spacer, and the outer packaging material 26 is sealed with the end portion 26a in close contact. A plurality of parallel grooves 18 extending in the vertical direction are formed on one surface of the vacuum heat insulating panels 21 and 22. The groove portion 18 is formed by notching the core material 25, and the outer packaging material 26 is in close contact with the inner surface of the groove portion 18 by vacuuming.

  Since the extension amount of the outer packaging material 26 is limited, the depth of the groove 18 is formed to be about 4 mm. Further, the bottom portion of the groove portion 18 is formed in a substantially arc-shaped cross-sectional shape, and the outer packaging material 26 can be easily adhered to the core material 25.

  The vacuum heat insulating panels 21 and 22 are formed in a flat plate shape, and then bent at the groove 18 by pressing or the like with the groove 18 inside. Thereby, the vacuum heat insulation panels 21 and 22 are easily bent and formed into a substantially L-shaped cross section having the inclined portion 21c. Grooves 18 are arranged at both ends of the inclined portion 21c. When bending is difficult with the groove 18 having a depth of about 4 mm, a similar groove facing the groove 18 may be provided on the outer surface side of the vacuum heat insulating panels 21 and 22. Moreover, when the thickness of the vacuum heat insulation panels 21 and 22 is 8 mm or more and 16 mm or less, it is easy to bend and a sufficient heat insulation effect can be obtained.

  The vacuum heat insulating panels 21 and 22 may be bent with the groove 18 on the outside. As a result, the thickness in the vicinity of the groove 18 is reduced, and the heat insulation is reduced, but damage to the outer packaging material 26 due to bending is reduced. Therefore, the possibility of lowering the vacuum due to secular change is reduced, and it can withstand long-term use.

  The outer packaging material 26 is composed of laminated films 27 and 28 that are arranged on both surfaces of the core material 25 and whose end portions 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 outer packaging 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.

  In the inclined portions 21c and 22c, a substantially circular contact portion 19 is formed in which the core material 25 is previously punched into a circular shape and the laminated films 27 and 28 are in close contact by thermal welding. A through hole 17 is provided in the close contact portion 19. The contact portion 19 is provided with an adhesive white D around the through hole 17 of 10 mm or more. Thereby, the circumference | surroundings of the through-hole 17 can be sealed reliably and a vacuum leak can be prevented. In addition, it is more preferable that the adhesive white D is 12 mm or more in consideration of processing variations. Thereby, for example, if the diameter of the through hole 17 is 35 mm, the diameter of the contact portion 19 is 59 mm.

  Further, the close contact portion 19 on the side facing the inner box 12 is formed inside the two groove portions 18 continuously to the bottom surface of the groove portion 18, but the close contact portion 19 may extend to the outside of the groove portion 18. . Further, a similar groove portion may be further provided between the two groove portions 18, and the inclined portion 21c may be formed by a plurality of inclined surfaces.

  FIG. 6 is an exploded perspective view showing a state when the heat insulating box 10 is assembled. A plurality of inlets 16 for injecting a stock solution of the foam heat insulating material 13 are provided in the chamfered portion 11 d on the back side of the outer box 11. A strip-shaped seal plate 11e (see FIG. 2) having a larger area than the inlet 16 and closing the inlet 16 is disposed on the inner surface side of the inlet 16. One end of the seal plate 11e is attached to the back plate 11a, and has an elasticity so that the injection port 16 can be opened and closed.

  When a nozzle (not shown) for discharging the stock solution of the foam heat insulating material 13 is inserted into the injection port 16, the seal plate 11e is pushed away by the nozzle. When the nozzle is pulled out after the injection of the stock solution of the foam heat insulating material 13 is completed, the seal plate 11e returns to its original position due to elasticity and closes the injection port 16. Thereby, the foaming heat insulating material 13 is prevented from leaking from the inlet 16 when the foaming heat insulating material 13 is foamed.

  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 (see FIG. 1). 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. The through holes 17 of the vacuum heat insulating materials 21 and 22 are disposed so as to face the respective injection ports 16 and are also disposed between the respective injection ports 16 as indicated by 17a in the drawing. As a result, the stock solution of the foam heat insulating material 13 injected from the injection port 16 flows between the vacuum heat insulating panels 21 and 22 and the inner box 12 through the through holes 17.

  Further, 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. Thereby, the undiluted | stock solution of the foam heat insulating material 13 is stored in the position which touches the clearance gaps 24a and 24b ahead of the vacuum heat insulation panels 21 and 22, and the vacuum heat insulation panels 21 and 22 depending on the case. The foamed heat insulating material 13 stock solution accumulated in the vicinity of the gaps 24a and 24b and the vacuum heat insulating panels 21 and 22 rises along both sides of the side portions 21b and 22b by foaming and fills both sides of the back portions 21a and 22a.

  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.

  According to this embodiment, since the vacuum heat insulation panels 21 and 22 are bent so as to cover the back and side surfaces 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, it is not necessary to form a gap 20a (see FIG. 9) for allowing the foamed heat insulating material 12 to penetrate into the boundary between the side surface and the back surface of the heat insulating box 10 having a long distance in the vertical direction. Therefore, the coverage of the vacuum heat insulation panels 21 and 22 can be increased to about 80%, and the heat insulation of the heat insulation box 10 can be improved.

  Furthermore, since the through-hole 17 was provided in the edge part of the back surface parts 21a and 22a of the vacuum heat insulation panels 21 and 22, the stock solution of the foam heat insulating material 13 inject | poured from the back side of the outer case 11 is used as the vacuum heat insulation panels 21 and 22 and It can be easily distributed between the inner box 12. Accordingly, it is possible to prevent a decrease in heat insulation performance due to insufficient filling of the foam heat insulating material 13. Moreover, since the vacuum heat insulation panels 21 and 22 having a substantially L-shaped cross section can be easily stacked, handling during transportation and storage becomes easy.

  Moreover, since the through-hole 17 was arrange | positioned facing the injection port 16 provided in the side edge part of the backplate 11a of the outer box 11, the undiluted | stock solution of the foam heat insulating material 13 inject | poured from the injection port 16 is more reliably vacuum-insulated. It can be distributed between the panels 21 and 22 and the inner box 12.

  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.

  Moreover, since the vacuum heat insulation panels 21 and 22 are vertically bent and bent by a plurality of parallel grooves 18 facing the inner box 12, the inclined portions 21c and 22c can be easily formed.

  Moreover, since the through-hole 17 is formed in the contact | adherence part 19 which stuck the outer packaging material 26 distribute | arranged on both surfaces of the core material 25, the circumference | surroundings of the through-hole 17 can be sealed easily and a vacuum leak can be prevented.

  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.

  Moreover, since the vacuum heat insulation panel 21 which covers the left side of the inner box 12 and the left part of the back surface and the vacuum heat insulation panel 22 having an L-shaped cross section which covers the right side surface of the inner box 12 and the right part of the back surface are provided. The left and right vacuum heat insulation panels 21 and 22 can be shared. Moreover, since the clearance 24c is provided between the two on the back side of the inner box 12, the stock solution of the foam heat insulating material 13 can be more reliably distributed between the vacuum heat insulating panels 21 and 22 and the inner box 12.

  Next, FIG. 7 is a top sectional view showing a heat insulating box 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. The vacuum heat insulation panels 21 and 22 of the heat insulation box 10 of the present embodiment are arranged such that the side surfaces 21 b and 22 b are close to the outer box 11. Other parts are the same as those in the first embodiment.

  The support member 15 attached to the side portions 21b and 22b of the vacuum heat insulating panels 21 and 22 is formed with a high height. Thereby, the side portions 21b and 22b are close to the outer box 11, and the inclined portions 21c and 22c are formed to extend to the vicinity of the outer case 12. The vacuum heat insulating panels 21 and 22 may be attached to the inner surface of the side plate 11b of the outer box 11, and the support member 15 disposed on the side portions 21b and 22b may be omitted.

  FIG. 8 shows a developed view of the vacuum heat insulation panels 21 and 22. In the inclined portions 21c and 22c of the vacuum heat insulating panels 21 and 22, a core member 25 is punched into a rectangular shape in advance, and a substantially rectangular contact portion 19 is formed to which the laminated films 27 and 28 are in close contact by thermal welding. A through hole 17 is provided in the close contact portion 19. The contact portion 19 is provided with an adhesive white D around the through hole 17 of 10 mm or more.

  The shape of the close contact portion 19 may be any shape as long as the adhesion white D can be secured. If the close contact portion 19 is circular or rectangular, variation in shape due to punching of the core material 25 can be reduced. Further, when the close contact portion 19 is formed in a circular shape as in the first embodiment (see FIG. 3), it is possible to secure a large area of the core member 25 and improve heat insulation.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, since the back surface parts 21a and 22a of the vacuum heat insulation panels 21 and 22 are separated from the outer box 11, and the side surface parts 21b and 22b are close to the outer box 11, the through-hole 17 is widely opened to the vicinity of the side plate 11b of the outer box 11. can do. Accordingly, the stock solution of the foam heat insulating material 13 injected from the back side of the outer box 12 can be more reliably distributed between the vacuum heat insulating panels 21 and 22 and the inner box 12.

  In addition, when the foam heat insulating material 13 does not spread enough to the back plate 11a side of the vacuum heat insulating panels 21 and 22, an inlet may be provided on the back portion of the back plate 11a. Then, the foamed heat insulating material 13 can be filled by simultaneously injecting the stock solution of the foam heat insulating material 13 from the back surface portion of the back plate 11a and the inlet provided in the chamfered portion 11d.

  Moreover, the undiluted | stock solution of the foam heat insulating material 13 distribute | circulates the outer side of the side parts 21b and 22b. For this reason, the foam heat insulating material 13 can be reliably filled by the side surface of the heat insulation box 10 by the through-hole 17a (refer FIG. 6) provided between the injection ports 16. FIG. In order to increase this effect, a plurality of through holes 17a may be provided.

  In addition, by providing one or a plurality of through holes 17a in the first embodiment, the flow of the foam heat insulating material 13 on the outer side and the inner side of the back surface portions 21a and 22a can be adjusted. In particular, it is effective when the amount of rising of the foam heat insulating material 13 inside the side portions 21b and 22b is large.

  Note that the back surface portions 21 a and 22 a of the vacuum heat insulating materials 21 and 22 may be close to the outer box 11. At this time, the through-hole 17 is formed in a substantially rectangular shape or the like so as not to hinder the elastic deformation of the seal plate 11e. Thereby, the support member 15 can be omitted. The back surface portions 21a and 22a and the side surface portions 21b and 22b may be close to the outer box, and the inclined portions 21c and 22 may be arranged away from the chamfered portion 11e. Further, the chamfered portion 11e and the inclined portions 21c and 22 may be adjacent to each other, and the close contact portion 19 may be formed to extend outside the inclined portions 21c and 22. Thereby, the through-hole 17 can be made larger.

  In the first and second embodiments, when the foam heat insulating material 13 on the back side of the heat insulating box 10 is insufficient, the through holes 17a (see FIG. 6) between the injection ports 16 that do not face the injection ports 16 may be omitted. . As a result, insufficient filling of the foamed heat insulating material 13 on the back side can be solved, and the area of the core material 25 can be widened to improve the heat insulating property of the heat insulating box 10.

  Moreover, the through-hole 17 should just be formed in the edge part by the side surfaces 21b and 22b side of the back surface parts 21a and 22a, and may incline the inclined parts 21c and 22c. Thereby, the undiluted | stock solution of the foam heat insulating material 13 can be easily guide | induced to the inner surface side of the side parts 21b and 22b. However, by providing the inclined portions 21c and 22c, contact between the nozzles inserted into the injection port 16 and the rear portions 21a and 22a can be easily avoided.

  Further, a flat vacuum heat insulating panel that covers the top surface of the inner box 12 may be provided separately, or a vacuum heat insulating panel that covers the bottom surface of the inner box 12 may be provided.

  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. The expanded view which shows the vacuum heat insulation panel of the refrigerator of 1st Embodiment of this invention AA sectional view of FIG. BB sectional view of FIG. The disassembled perspective view which shows the heat insulation box of the refrigerator of 1st Embodiment of this invention. Top sectional drawing which shows the heat insulation box of the refrigerator of 2nd Embodiment of this invention. The expanded view which shows the vacuum heat insulation panel 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 heat insulating material 15 Support member 17 Through-hole 18 Groove part 19 Contact | adherence part 20, 21, 22 Vacuum heat insulation panel 21a, 22a Back part 21b, 22b Side part 21c, 22c Inclined part 24a- 24c Clearance 25 Core material 26 Outer packaging material 27, 28 Laminated film

Claims (6)

  An inner box that opens on the front surface, 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 material that is covered with an outer packaging material is decompressed inside. And a refrigerator having a heat insulating box having a vacuum heat insulating panel disposed between the inner box and the outer box, the vacuum heat insulating panel includes a back surface portion covering the back surface of the inner box and the back surface portion. A refrigerator having a side portion that covers one side of the inner box by bending one end, and the back portion has a through hole at the end on the bent side.   2. The refrigerator according to claim 1, wherein an inlet for injecting the stock solution of the foam heat insulating material is provided at a side end portion of the back surface of the outer box, and the through hole is disposed to face the inlet.   The injection port is provided in a chamfered portion where the corners of the back surface and the side surface of the outer box are chamfered, an inclined portion that is inclined to face the chamfered portion is formed at an end portion of the back surface portion, and the through hole is formed. The refrigerator according to claim 2, wherein the refrigerator is provided in the inclined portion.   The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulating panel has the back surface portion separated from the outer box and the side surface portion close to the outer 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.   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 any one of claims 1 to 5, wherein a cover is provided and a gap is provided between the two on the back side of the inner box.

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