JP2019032161A - refrigerator - Google Patents

Abstract

To improve heat insulation performance.SOLUTION: A refrigerator includes a heat insulation box body. The heat insulation box body has: a bottom part heat insulation wall; leg members which are provided so as to protrude to an area below the bottom part heat insulation wall; and leg support members which are provided at the bottom part heat insulation wall and to which the leg members are respectively attached. The bottom part heat insulation wall has: an inner box; a bottom plate forming the outer side of a bottom part of the heat insulation box body; a first bottom part vacuum heat insulation panel provided at the bottom plate side between the inner box and the bottom plate; and a second bottom part vacuum heat insulation panel which is located at the inner box side of the first bottom part vacuum heat insulation panel between the inner box and the bottom plate and is provided so as to cover the first bottom part vacuum heat insulation panel. The bottom plate has: attachment parts to which the leg support members are respectively attached; and a recessed part which is formed protruding downward so as to at least partially overlap with each leg support member in a thickness direction of the leg support member and houses the first bottom part vacuum heat insulation panel. The second bottom part vacuum heat insulation panel is formed so as to avoid the attachment parts.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a refrigerator.

  In recent years, as a heat insulating material for a heat insulating box of a refrigerator, for example, a vacuum heat insulating panel is used instead of a conventional foam heat insulating material such as urethane foam or in combination with a foam heat insulating material. The vacuum insulation panel is, for example, a core material obtained by compressing and curing a laminated material of inorganic fibers such as glass wool in a bag of a synthetic resin film such as polyethylene having a gas barrier performance, and then evacuating the inside to seal it under reduced pressure. It is configured.

  The vacuum heat insulation panel is superior in heat insulation performance compared with conventional foam heat insulation materials such as urethane foam. Therefore, by adopting a vacuum heat insulating panel as the heat insulating material, the heat insulating performance of the heat insulating wall can be improved or the heat insulating wall can be made thinner as compared with the case where the heat insulating material is only urethane foam. As a result, it is possible to contribute to a reduction in power consumption of the refrigerator and an increase in the internal volume.

JP 2011-89734 A

However, since it is difficult to form a vacuum heat insulating panel in a complicated shape, it is generally formed in a plate shape. Therefore, in the conventional heat insulation box of the refrigerator, each simple heat insulating wall is constituted by a single plate-like vacuum heat insulation panel. Therefore, the heat insulation box of the conventional configuration has room for improvement in the configuration of the vacuum heat insulation panel in order to improve the heat insulation performance.
Then, the refrigerator with which the improvement of heat insulation performance is aimed at is provided.

  The refrigerator according to the embodiment includes a heat insulating box having a storage room for storing stored items, and an opening that communicates the inside and the outside of the storage room. The heat insulation box is provided with a bottom heat insulation wall constituting the bottom of the storage chamber and legs on both sides of the bottom heat insulation wall on the opening side so as to protrude downward from the bottom heat insulation wall. A member, and a leg support member provided on the bottom heat insulating wall and to which the leg member is attached. The bottom heat insulating wall is provided on the bottom plate side between the inner box forming the inside of the heat insulating box, the bottom plate forming the outside of the bottom of the heat insulating box, and the inner box and the bottom plate. Between the first bottom vacuum heat insulation panel and the inner box and the bottom plate, the first bottom vacuum heat insulation panel is located on the inner box side of the first bottom vacuum heat insulation panel, and is provided to cover the first bottom vacuum heat insulation panel. 2 bottom vacuum insulation panels. The bottom plate has an attachment portion to which the leg support member is attached, a recess that is formed to protrude downward so that at least a portion thereof overlaps in the thickness direction of the leg support member, and accommodates the first bottom vacuum insulation panel, Have The second bottom vacuum heat insulation panel is formed so as to avoid the mounting portion.

  In addition, the refrigerator includes a heat insulating box having a storage room in a refrigeration temperature zone and a storage room in a refrigeration temperature zone, and an opening that communicates the inside and the outside of the storage chamber. The said heat insulation box has a back part heat insulation wall which comprises the wall part on the opposite side to the said opening part. The back heat insulation wall includes a first back vacuum heat insulation panel that covers both the storage room in the refrigeration temperature zone and the storage room in the freezing temperature zone, and a second back vacuum that covers at least a part of the storage room in the freezing temperature zone. And an insulation panel.

  In addition, the refrigerator has a storage chamber for storing the storage, an insulating box having an opening communicating the inside and the outside of the storage chamber, and a cooler for cooling the storage chamber, Is provided. The said heat insulation box has a side part heat insulation wall which comprises a side wall part with respect to the said opening part. The side heat insulating wall includes a first side vacuum heat insulating panel that covers a side of the storage chamber, and a second side vacuum heat insulating panel that is smaller than the first side vacuum heat insulating panel and covers the side of the cooler. And have.

  In addition, the refrigerator includes a heat insulation box having a storage room for storing stored items and an opening that communicates the inside and the outside of the storage room. The said heat insulation box has the heat insulation wall which comprises the wall part of the said storage chamber. The heat insulation wall includes an inner box constituting the inside of the heat insulation box, an outer box constituting the outside of the heat insulation box, and a first vacuum heat insulation panel provided between the inner box and the outer box. And a second vacuum heat insulation panel provided so as to cover the first vacuum heat insulation panel between the inner box and the outer box. The second vacuum heat insulation panel has a bent portion formed by bending a plate-like vacuum heat insulation panel. The first vacuum heat insulation panel is disposed at a position avoiding the bent portion.

Longitudinal side view showing an example of a cross section of a refrigerator according to an embodiment Perspective view of heat insulation box Exploded perspective view of heat insulation box Transverse plan view taken along line X4-X4 in FIG. A perspective view showing the configuration around the bottom plate Exploded perspective view showing the configuration around the bottom plate The perspective view which shows the structure around the 1st bottom part vacuum heat insulation panel Front view showing the configuration around the backboard Vertical side view showing the configuration of the lower part of the back insulation wall Longitudinal side view showing the configuration around the front part of the bottom plate Longitudinal front view taken along line X11-X11 in FIG.

Hereinafter, the refrigerator provided with the heat insulation box by one Embodiment is demonstrated with reference to drawings.
As shown in FIG. 1, the refrigerator 10 includes a plurality of storage rooms in a vertically long rectangular box-shaped heat insulating box 40 whose front surface is open. In the following description, the opening 401 side of the heat insulating box 40, that is, the left side in FIG. 1 is the front side of the refrigerator 10, and the opposite side of the opening 401, that is, the right side in FIG. Further, the vertical direction with respect to the direction of gravity when the refrigerator 10 is set on the floor in the posture of FIG. And let the left-right direction at the time of seeing the refrigerator of FIG. 1 from the front side be the left-right direction of the refrigerator 10. FIG.

  As shown in FIG. 1, the refrigerator 10 is mainly composed of a heat insulating box 40. The heat insulation box 40 has a plurality of storage chambers therein. The refrigerator 10 includes, for example, a refrigerator compartment 11, a vegetable compartment 12, an ice making compartment 13, a small freezer compartment (not shown), and a freezer compartment 14 as a plurality of storage compartments for storing stored items. The opening 401 communicates the inside and the outside of each storage chamber 11, 12, 13, 14. The refrigerator compartment 11 is provided at the uppermost stage of the heat insulating box 40. The vegetable compartment 12 is provided below the refrigerator compartment 11. The ice making room 13 and a small freezer room (not shown) are provided below the vegetable room 12 and arranged side by side. The freezer compartment 14 is provided below the ice making chamber 13 and a small freezer compartment (not shown), that is, at the bottom of the refrigerator 10.

  The refrigerator compartment 11 and the vegetable compartment 12 are both storage compartments in a refrigerated temperature zone, and are maintained in a positive temperature zone of 1 to 4 ° C., for example. The refrigerator compartment 11 and the vegetable compartment 12 are vertically partitioned by a partition wall 15 made of synthetic resin. The refrigerator 10 includes a refrigerator compartment door 16 and a vegetable compartment door 17. The refrigerator compartment door 16 has heat insulation properties and is provided on the front side of the refrigerator compartment 11. The refrigerator compartment door 16 is a hinged door that opens and closes the front of the refrigerator compartment 11. The vegetable compartment door 17 has heat insulation properties and is provided on the front side of the vegetable compartment 12. The vegetable compartment door 17 is a drawer-type door to which the container 171 is connected, and opens and closes the front of the vegetable compartment 12.

  The ice making room 13, the small freezer room (not shown), and the freezer room 14 are all storage rooms in a freezing temperature zone, and are maintained in a minus temperature zone of, for example, −10 to −20 ° C. The vegetable compartment 12, the ice making compartment 13, and a small freezer compartment (not shown) are partitioned up and down by a heat insulating partition wall 41. The heat insulating partition wall 41 is provided integrally with the heat insulating box 40. The refrigerator 10 includes an ice making room door 18, a small freezing room door (not shown), and a freezing room door 19.

  The ice making room door 18 has heat insulation properties and is provided on the front side of the ice making room 13. The ice making chamber door 18 is a drawer type door to which the container 181 is connected, and opens and closes the front surface of the ice making chamber 13. A small freezer compartment door (not shown) has heat insulation properties and is provided on the front side of the small freezer compartment. The small freezer compartment door is a drawer-type door to which a container (not shown) is connected, and opens and closes the front surface of the small freezer compartment (not shown). The freezer compartment door 19 has heat insulation properties and is provided on the front side of the freezer compartment 14. The freezer compartment door 19 is a drawer-type door to which the containers 191 and 192 are connected, and opens and closes the front surface of the freezer compartment 14.

  The refrigerator 10 includes a refrigeration cycle for cooling each storage room. The refrigeration cycle includes, for example, a refrigeration cooler 20, a refrigeration cooler 21, a compressor 22, a condenser (not shown), and the like. The refrigerator 20 for refrigeration produces | generates the cold air for cooling the refrigerator compartment 11 and the vegetable compartment 12 which are storage rooms of a refrigerator temperature zone. The refrigeration cooler 21 generates cold air for cooling the ice making chamber 13, which is a freezing temperature zone storage chamber, a small freezing chamber (not shown), and the freezing chamber 14. The compressor 22 is provided in a machine room 42 formed on the lower rear side of the heat insulating box 40.

  The refrigerator 10 includes a refrigeration cooler chamber 23, a cold air duct 24, and a refrigeration blower fan 25. The refrigerating cooler chamber 23 is provided behind the lower portion of the refrigerating chamber 11. The refrigeration cooler 20 and the refrigeration blower fan 25 are provided in the refrigeration cooler chamber 23. One side of the refrigeration cooler chamber 23 communicates with the vegetable chamber 12 via the suction port 231, and the other side communicates with the cold air duct 24. The cold air duct 24 extends upward along the back surface of the refrigerator compartment 11 and has a plurality of outlets 241 communicating with the refrigerator compartment 11. The refrigerator compartment 11 and the vegetable compartment 12 are mutually connected by the communication port which is not shown in figure.

  When the refrigeration blower fan 25 is driven, the air in the vegetable compartment 12 is sucked into the refrigeration cooler compartment 23 from the suction port 231 as shown by the arrow in FIG. The sucked air is cooled when passing through the refrigeration cooler 20. The cold air cooled by the refrigerating cooler 20 is blown out from the plurality of outlets 241 to the refrigerating chamber 11 through the cold air duct 24 by the blowing action of the refrigerating blower fan 25. Thereby, the refrigerator compartment 11 is cooled to the temperature of the refrigerator temperature zone. A part of the cold air blown into the refrigerator compartment 11 is also supplied into the vegetable compartment 12. Thereby, the vegetable compartment 12 is also cooled to the temperature of the refrigeration temperature range. And the air which cooled the refrigerator compartment 11 and the vegetable compartment 12 is again sucked into the refrigerator room 23 for refrigerator from the suction inlet 231. FIG. In this way, cold air is circulated.

  The refrigerator 10 includes a refrigeration cooler chamber 26 and a refrigeration blower fan 27. The refrigeration cooler room 26 is provided in the storage room in the freezing temperature zone, that is, the ice making room 13, the small freezing room (not shown), and the freezing room 14. The refrigeration cooler 21 and the refrigeration blower fan 27 are provided in the refrigeration cooler chamber 26. In this case, as shown in FIG. 4, the refrigeration cooler 21 is provided in the refrigeration cooler chamber 26 so as to be slightly shifted to the left with respect to the center in the left-right direction. As shown in FIG. 1, the refrigeration cooler chamber 26 has a suction port 261 and a blowout port 262. The suction port 261 is provided in the lower part of the freezing cooler chamber 26 and communicates with the freezing chamber 14. The air outlet 262 is provided above the air inlet 261 and communicates with the ice making chamber 13, a small freezer compartment (not shown), and the freezer compartment 14.

  When the refrigeration blower fan 27 is driven, the cold air generated by the refrigeration cooler 21 is supplied from each outlet 262 into the ice making chamber 13, the small freezer compartment (not shown), and the freezer compartment 14, and then sucked in. Circulation is performed such that the refrigerant is returned from the port 261 into the refrigeration cooler chamber 26. Thereby, the ice making room 13, the small freezer room not shown, and the freezer room 14 are cooled to the temperature of the freezing temperature zone.

  The refrigerator 10 includes a control device 31. The control device 31 controls the overall operation of the refrigerator by controlling the driving of the compressor 22, the refrigeration blower fan 25, the freezing blower fan 27, and the like. In this case, the control device 31 is provided in a ceiling portion above the refrigerator compartment 11. The refrigerator 10 includes a drainage basin 28, a drainage pipe 29, and an evaporating dish 30. The drainage basin 28 is provided below the refrigeration cooler 21 and receives defrost water generated when the refrigeration cooler 21 is defrosted. The evaporating dish 30 is provided above the compressor 22 in the machine room 42. The drainage pipe 29 connects the drainage basin 28 and the evaporating dish 30. The defrost water generated from the refrigeration cooler 21 is dropped into the drainage basin 28 and guided to the evaporating dish 30 through the drainage pipe 29. Then, the defrosted water guided to the evaporating dish 30 is heated by heat generated by the compressor 22 and evaporated.

  Next, a specific configuration of the heat insulating box 40 will be described. As shown in FIGS. 2 and 3, the heat insulating box 40 has a synthetic resin inner box 50 and a metal outer box 60. The inner box 50 constitutes the inside of the heat insulating box 40. The outer box 60 constitutes the outside of the heat insulating box 40. The inner box 50 is formed in a box shape having an opening 401 on the front surface, and spaces serving as the storage chambers 11 to 14 are formed inside the box shape.

  The outer box 60 is configured by combining a plurality of metal outer plates, in this case, as shown in FIG. 3, a left plate 61, a right plate 62, a ceiling plate 63, a bottom plate 64, and a back plate 65. . A gap is formed between the inner box 50 and the outer box 60, and a heat insulating material such as a foam heat insulating material 43 or a vacuum heat insulating panel is provided in the gap. The foam heat insulating material 43 is, for example, urethane foam or the like, is a liquid having fluidity when filled, and foams and solidifies after filling. Moreover, the vacuum heat insulation panel is a plate-like thing which has little flexibility.

  Specifically, as shown in FIG. 3, the left plate 61 constitutes the left outer surface of the heat insulating box 40 and is attached to the left side surface portion of the inner box 50. And as shown in FIG.1 and FIG.4, between the left board 61 and the inner case 50, the 1st left side vacuum insulation panel 71, the 2nd left side vacuum insulation panel 72, and the urethane foam 43 are provided, Thereby, the left side heat insulating wall 44 is configured. The first left side vacuum heat insulation panel 71 is formed to have a size that covers the entire left side surface of the heat insulation box 40.

  The first left vacuum insulating panel 71 is adhered to the left plate 61 by, for example, double-sided tape or hot melt. The second left-side vacuum heat insulation panel 72 is bonded to the inner surface of the first left-side vacuum heat insulation panel 71, that is, the surface opposite to the left plate 61 by, for example, double-sided tape or hot melt. In this case, the material and manufacturing method of the first left side vacuum heat insulation panel 71 and the second left side vacuum heat insulation panel 72 may be the same or different. For example, with respect to the second left side vacuum heat insulation panel 72 disposed closer to the inner box 50 than the first left side vacuum heat insulation panel 71, the packaging used for the second left side vacuum heat insulation panel 72 is (1) The left side vacuum heat insulation panel 71 is made of a material having a higher strength than that of the sachet used for the left side vacuum heat insulation panel 71 or a thicker one. In this way, the first left side vacuum insulation panel 71 and the second left side vacuum insulation panel 72 may have different strengths.

  The second left side vacuum heat insulation panel 72 is formed smaller than the first left side vacuum heat insulation panel 71. In this case, as shown in FIG. 4, the second left side vacuum heat insulation panel 72 is formed in a size that covers the left side of the refrigeration cooler 21 in the vertical and front-rear directions. That is, a portion of the left side heat insulating wall 44 corresponding to the left side of the refrigeration cooler 21 has a double structure in which two vacuum heat insulating panels 71 and 72 are provided. For this reason, in the left side heat insulating wall 44, the portion corresponding to the left side of the refrigeration cooler 21, that is, the portion overlapping the refrigeration cooler 21 has higher heat insulation performance than the other portions.

  Here, when filling the left side heat insulating wall 44 with the urethane foam 43, the liquid foam urethane 43 is injected from the rear side to the front side of the left side heat insulating wall 44. In this case, as shown in FIG. 4, the distance between the second left side vacuum heat insulation panel 72 and the inner box 50 is the first left side vacuum heat insulation in a portion where the second left side vacuum heat insulation panel 72 is not provided. It is set to be equal to or greater than the distance between the panel 71 and the inner box 50. Therefore, even if it is the structure which provided the 2nd left side vacuum insulation panel 72 in the 1st left side vacuum insulation panel 71, it suppresses that the 2nd left side vacuum insulation panel 72 prevents the flow of the liquid foaming urethane 43. In addition, the urethane foam 43 can be efficiently filled.

  The first left vacuum insulating panel 71 has a plurality of left groove portions 711 on the left plate 61 side. For example, two left groove portions 711 are provided at the front portion and the rear portion of the first left side vacuum heat insulating panel 71 and are formed to extend in the vertical direction. And the heat radiating pipe 32 which comprises a part of refrigerating cycle is accommodated in the space formed between the left groove part 711 and the left board 61. FIG.

  In this case, the second left side vacuum heat insulation panel 72 is provided so as to cover the right side of the rear side heat radiation pipe 32 among the two front and rear heat radiation pipes 32 passing through the left groove portion 711. That is, the second left side vacuum heat insulating panel 72 is provided so as to cover the inside of the heat radiating pipe 32 close to the refrigeration cooler 21 among the plurality of heat radiating pipes 32 passing through the left groove 711. That is, a portion of the left heat insulating wall 44 corresponding to the heat radiating pipe 32 close to the refrigeration cooler 21 has a double structure in which two vacuum heat insulating panels 71 and 72 are provided. That is, two vacuum heat insulation panels 71 and 72 are provided between the heat radiating pipe 32 and the refrigeration cooler 21. For this reason, in the left side heat insulating wall 44, the portion corresponding to the heat radiating pipe 32 close to the refrigeration cooler 21 has higher heat insulating performance than the other portions. Therefore, the refrigeration cooler 21 is less susceptible to the heat radiation of the heat radiating pipe 32.

  The right plate 62 constitutes the right outer side surface of the heat insulating box 40 and is attached to the right side surface portion of the inner box 50 as shown in FIG. And between the right board 62 and the inner box 50, the 1st right side vacuum insulation panel 73, the 2nd right side vacuum insulation panel 74, and the urethane foam 43 are provided, and, thereby, the right side insulation wall 45 comprises. Has been. The right side heat insulating wall 45 is symmetrical to the left side heat insulating wall 44. That is, the first right side vacuum heat insulation panel 73 is formed to have a size that covers the entire right side surface of the heat insulation box 40.

  The first right-side vacuum heat insulation panel 73 is bonded to the right plate 62 by, for example, double-sided tape or hot melt. The second right side vacuum heat insulation panel 74 is bonded to the inner surface of the first right side vacuum heat insulation panel 73, that is, the surface opposite to the right plate 62, for example, by double-sided tape or hot melt. In this case, the material and manufacturing method of the first right side vacuum heat insulating panel 73 and the second right side vacuum heat insulating panel 74 may be the same or different. For example, for the second right side vacuum heat insulation panel 74 arranged closer to the inner box 50 than the first right side vacuum heat insulation panel 73, the packaging used for the second right side vacuum heat insulation panel 74 is (1) A material having a higher strength than that of a sachet used for the right-side vacuum heat insulating panel 73 or a thicker one is used. In this way, the first right vacuum insulating panel 73 and the second right vacuum insulating panel 74 may have different strengths.

  The second right side vacuum insulation panel 74 is formed smaller than the first right side vacuum insulation panel 73. In this case, as shown in FIG. 4, the second right side vacuum heat insulation panel 74 is formed in a size that covers the right side of the refrigeration cooler 21 in the vertical and front-back directions. That is, a portion of the right side heat insulating wall 45 corresponding to the right side of the refrigeration cooler 21 has a double structure in which two vacuum heat insulating panels 73 and 74 are provided. For this reason, in the right side heat insulating wall 45, the portion corresponding to the right side of the refrigeration cooler 21, that is, the portion overlapping the refrigeration cooler 21, has higher heat insulation performance than the other portions. Therefore, the refrigeration cooler 21 is less susceptible to the heat radiation of the heat radiating pipe 32.

  Here, when the right side heat insulating wall 45 is filled with the urethane foam 43, the liquid foam urethane 43 is injected from the rear side to the front side of the right side heat insulating wall 45. In this case, as shown in FIG. 4, the distance between the second right side vacuum heat insulation panel 74 and the inner box 50 is the first right side vacuum heat insulation in the portion where the second right side vacuum heat insulation panel 74 is not provided. It is set to be equal to or greater than the distance between the panel 73 and the inner box 50. Therefore, even if it is the structure which provided the 2nd right side vacuum insulation panel 74 in the 1st right side vacuum insulation panel 73, it suppresses that the 2nd right side vacuum insulation panel 74 prevents the flow of the liquid foaming urethane 43. In addition, the urethane foam 43 can be efficiently filled.

  The first right side vacuum heat insulation panel 73 has a plurality of right groove portions 731 on the right plate 62 side. For example, two right groove portions 731 are provided at the front portion and the rear portion of the first right side vacuum heat insulating panel 73 and are formed to extend in the vertical direction. And the heat radiating pipe 32 which comprises a part of freezing cycle is accommodated in the space formed between the right groove part 731 and the right board 62. FIG.

  In this case, the second right side vacuum heat insulation panel 74 is provided so as to cover the left side of the rear side heat radiation pipe 32 among the two front and rear heat radiation pipes 32 passing through the right groove portion 731. That is, the second right side vacuum heat insulating panel 74 is provided so as to cover the inside of the heat radiating pipe 32 close to the refrigeration cooler 21 among the plurality of heat radiating pipes 32 passing through the right groove portion 731. That is, in the right side heat insulating wall 45, the portion corresponding to the heat radiating pipe 32 close to the refrigeration cooler 21 has a double structure in which two vacuum heat insulating panels 73 and 74 are provided. That is, two vacuum heat insulation panels 73 and 74 are provided between the heat radiating pipe 32 and the refrigeration cooler 21. For this reason, in the right side heat insulation wall 45, the part corresponding to the heat radiating pipe 32 close to the refrigeration cooler 21 has higher heat insulation performance than the other parts.

  The ceiling plate 63 constitutes the upper and outer surfaces of the heat insulating box 40 and is attached to the ceiling surface portion of the inner box 50 as shown in FIG. As shown in FIG. 1, the ceiling-side vacuum heat insulation panel 75 and the urethane foam 43 are provided between the ceiling plate 63 and the inner box 50, thereby forming the ceiling heat insulation wall 46. The ceiling-side vacuum heat insulation panel 75 is formed in a size that covers the entire ceiling surface inside the box of the heat insulation box 40. The ceiling-side vacuum heat insulation panel 75 is bonded to the ceiling portion or the ceiling plate 63 of the inner box 50 by, for example, double-sided tape or hot melt.

  The bottom plate 64 constitutes the lower outer surface of the heat insulating box 40 and is attached to the bottom surface of the inner box 50 as shown in FIG. And as shown in FIG.1 and FIG.6, between the baseplate 64 and the inner case 50, the 1st bottom part vacuum heat insulation panel 76, the 2nd bottom part vacuum heat insulation panel 77, and the foaming urethane 43 are provided, thereby, A bottom heat insulating wall 47 is formed. In this case, the first bottom vacuum insulation panel 76 and the second bottom vacuum insulation panel 77 may be the same or different in material and manufacturing method. As shown in FIG. 6, the bottom plate 64 integrally includes a large bottom surface portion 641, a small bottom surface portion 642, and a connection portion 643. The large bottom surface portion 641, the small bottom surface portion 642, and the connection portion 643 are integrally formed, for example, by bending a single metal plate.

  The large bottom surface portion 641 constitutes the bottom portion of the storage chamber provided at the lowermost portion of the heat insulating box 40. In this case, the large bottom surface portion 641 is the bottom portion of the freezer compartment 14. The small bottom surface portion 642 is provided above the large bottom surface portion 641 and constitutes the bottom portion of the refrigeration cooler chamber 26. The area of the large bottom surface portion 641 is larger than the area of the small bottom surface portion 642. The connection portion 643 connects the rear end portion of the large bottom surface portion 641 and the front end portion of the small bottom surface portion 642. That is, the connection portion 643 is provided so as to rise upward from the rear end portion of the large bottom surface portion 641 and to fall downward from the front end portion of the small bottom surface portion 642.

  The large bottom surface portion 641 has a recess 644 and an outer peripheral portion 645. The concave portion 644 is formed so that the central portion of the large bottom surface portion 641 is recessed downward in a rectangular shape. That is, the recess 644 is formed to protrude downward so as to avoid a screw hole 649, which will be described later, toward the center in the left-right direction of the bottom heat insulating wall 47. The outer peripheral portion 645 is formed above the concave portion 644 so as to surround the outer periphery of the concave portion 644. In this case, the front edge 646 of the outer peripheral portion 645 is formed to be slightly lower than the other portions of the outer peripheral portion 645.

  As shown in FIG. 1, the height position of the inner surface of the first bottom vacuum heat insulation panel 76, that is, the surface on the freezer compartment 14 side is substantially the same as the height position of the surface on the freezer compartment 14 side of the outer peripheral portion 645, or The surface of the first bottom vacuum insulation panel 76 is slightly higher. That is, the thickness dimension of the first bottom vacuum heat insulation panel 76 is equal to the height dimension of the step formed by the recess 644 and the outer peripheral part 645, or the thickness dimension of the first bottom vacuum heat insulation panel 76 is better. large.

  The first bottom vacuum heat insulation panel 76 is formed in a rectangular shape and is housed in the recess 644. The first bottom vacuum heat insulating panel 76 is bonded to the upper surface of the recess 644, that is, the surface on the refrigerator compartment 11 side by, for example, double-sided tape or hot melt. The outer shape of the first bottom vacuum heat insulation panel 76 is smaller than the recess 644. Therefore, there is a gap between the outer peripheral side of the first bottom vacuum heat insulating panel 76 and the outer peripheral side of the concave portion 644, that is, between the boundary portion between the concave portion 644 and the outer peripheral portion 645 and the first bottom vacuum heat insulating panel 76. 471 is formed. The urethane foam 43 is filled in the gap 471 between the first bottom vacuum heat insulating panel 76 and the outer peripheral side of the recess 644.

  As shown in FIG. 7, in the rear portion of the recess 644, a portion where the first bottom vacuum heat insulation panel 76 is not provided, that is, a portion between the outer peripheral portion 645 and the first bottom vacuum heat insulation panel 76 has a plurality of minute holes. 647 is formed. The plurality of holes 647 pass through the recess 644 and communicate the inside and the outside of the bottom heat insulating wall 47. The size of the hole 647 is set as follows. That is, the liquid foamed urethane 43 filled inside the bottom heat insulating wall 47 does not leak out of the heat insulating box 40 due to the surface tension, and the gas generated when the foamed urethane 43 is solidified is insulated from the heat insulating box 40. The size of the hole 647 is set so as to be discharged to the outside.

  The heat insulation box 40 is filled with foamed urethane 43 as follows, for example. Although details are not illustrated, the heat insulation box 40 has an injection port for injecting the urethane foam 43 into the inside of each wall. This inlet is provided in the rear part of the heat insulation box 40. The heat insulating box 40 is disposed on a work table (not shown) such that when urethane foam is injected, the opening 401 on the front surface is directed downward and the injection port (not shown) is directed upward. Then, the liquid foamed urethane 43 before foaming is injected into the inside of the wall portion of the heat insulating box 40 from an injection port (not shown).

  The liquid urethane foam 43 accumulates in order from the bottom, that is, from the opening 401 side, and foams inside the wall. At that time, gas is generated by foaming the foamed urethane 43. When this gas is accumulated in the wall portion, the pressure in the wall portion increases, so it is necessary to discharge the gas to the outside. In the present embodiment, the gas generated when filling the urethane foam 43 is a hole 647 formed in the rear part of the heat insulating box 40, that is, a hole 647 formed so as to be positioned at the top when filling the urethane foam 43. Is discharged to the outside.

  The second bottom vacuum heat insulation panel 77 is provided on the upper surface of the first bottom vacuum heat insulation panel 76. That is, the second bottom vacuum heat insulation panel 77 is provided on the surface of the first bottom vacuum heat insulation panel 76 on the storage chamber side, that is, the surface on the freezer compartment 14 side. As shown in FIG. 5, the second bottom vacuum heat insulating panel 77 integrally includes a bottom 771 and a rising portion 772. The second bottom vacuum heat insulating panel 77 is formed as follows, for example. That is, for example, a mold is pressed against one vacuum heat insulating panel, and a groove serving as a boundary portion between the bottom portion 771 and the rising portion 772 is formed. Then, by bending the vacuum heat insulation panel in which the groove is formed along the groove, a bent portion 774 serving as a boundary portion between the bottom portion 771 and the rising portion 772 is formed by bending the plate-like vacuum heat insulation panel. The As a result, in the second bottom vacuum heat insulating panel 77, the bottom portion 771 and the rising portion 772 are integrally formed via the bent portion 774.

  The bottom 771 is larger than the first bottom vacuum heat insulation panel 76 and covers the entire upper portion of the first bottom vacuum heat insulation panel 76. In this case, the bottom 771 is placed on a portion excluding the first bottom vacuum heat insulating panel 76 and the front edge 646 of the outer peripheral portion 645. The lower surface of the bottom 771, that is, the surface opposite to the refrigerator compartment 11, is at least one of the upper surface of the first bottom vacuum heat insulating panel 76 and the portion excluding the front edge 646 of the outer peripheral portion 645. It is adhered by such as. Thus, the two vacuum heat insulation panels 76 and 77 are provided in the bottom part of the heat insulation box 40, ie, the bottom part of the freezer compartment 14, and the heat insulation performance is high.

  The rising portion 772 is provided so as to rise upward from the rear portion of the bottom portion 771. As shown in FIG. 5, the rising portion 772 covers the front of the connection portion 643 of the bottom plate 64. That is, the rising portion 772 covers the front surface of the machine room 42, that is, the freezer compartment 14 side.

  The bottom plate 64 is provided with a plurality of resin foams, in this case, a first resin foam 661 and a second resin foam 662. The resin foams 661 and 662 are, for example, plastic foams excellent in heat insulation and flexibility, and are so-called soft tapes. In this case, as shown in FIG. 7, two first resin foams 661 are provided in the front portion of the recess 644. When assembling the heat insulation box 40, the operator puts the first bottom vacuum heat insulation panel 76 into the recess 644 such that the front edge of the first bottom vacuum heat insulation panel 76 contacts the rear part of the first resin foam 661. Deploy. As a result, a sufficient gap 471 for filling the urethane foam 43 is formed in the outer peripheral portion of the first bottom vacuum heat insulating panel 76.

  That is, the operator can easily determine the position of the first bottom vacuum heat insulation panel 76 in the concave portion 644 by placing the first bottom vacuum heat insulation panel 76 in the concave portion 644 while contacting the first resin foam 66. It can be carried out. Therefore, by providing the first resin foam 661, the positioning operation of the first bottom vacuum heat insulation panel 76 with respect to the recess 644 is facilitated. A plurality of second resin foams 662 are provided on the outer peripheral portion 645 and the connection portion 643. In this case, the second resin foam 662 is provided between the second bottom vacuum heat insulating panel 77 and the bottom plate 64.

  As shown in FIGS. 5 and 6, the second bottom vacuum heat insulating panel 77 is provided with a plurality of third resin foams 663. The third resin foam 663 is also composed of, for example, a soft tape, like the resin foams 661 and 662 described above. The third resin foam 663 is disposed between the bottom surface portion of the inner box 50 and the second bottom vacuum insulation panel 77. Thus, a gap 648 sufficient to fill the urethane foam 43 is formed between the inner box 50 and the second bottom vacuum heat insulation panel 77 as shown in FIG. Further, by providing the third resin foam 663 between the inner box 50 and the second bottom vacuum heat insulating panel 77, the second bottom vacuum heat insulating panel 77 is difficult to contact the bottom of the inner box 50. Thereby, it can suppress that the 2nd bottom vacuum heat insulation panel 77 and the inner case 50 contact, and the 2nd bottom vacuum heat insulation panel 77 is damaged.

  As shown in FIGS. 1, 5, and 6, the refrigerator 10 includes a leg support member 67 and a leg member 68. Two leg support members 67 and two leg members 68 are provided on each of the left and right sides of the front portion of the bottom surface of the heat insulation box 40. The leg member 68 is formed, for example, by bending a metal plate. It is provided so as to protrude downward from the bottom of the heat insulating box 40, and is configured so that the protruding length can be adjusted. The user of the refrigerator 10 adjusts the protruding length of the leg members 68 provided on the left and right sides of the front part according to the state of the installation surface on which the refrigerator 10 is installed, thereby moving the refrigerator 10 in the left and right and front and rear directions. The tilt can be adjusted.

  Specifically, as shown in FIGS. 6, 10, and 11, the leg support member 67 is formed in a shape that is long in the front-rear direction as a whole, for example, by bending and processing a metal plate material. The leg support member 67 is attached to the leg member 68 and supports the leg member 68. The leg support member 67 has two through holes 671 and one screw hole 672. The through hole portion 671 is provided at the center portion and the rear portion of the leg support member 67, and is formed through the leg support member 67 in the vertical direction. The screw hole 672 is formed in front of the leg support member 67, that is, in front of the two through holes 671. The screw hole portion 672 is a screw hole that penetrates the leg support member 67 in the vertical direction. That is, a female screw is formed inside the screw hole 672.

  The bottom plate 64 has two screw holes 649 on each of the left and right sides. The screw hole 649 is an attachment portion for attaching the leg support member 67 to the bottom plate 64. The screw hole 649 is a screw hole that penetrates the front portion of the outer peripheral portion 645 of the large bottom surface portion 641 in the vertical direction. That is, a female screw is formed inside the screw hole 649. A chamfered portion 773 is formed on the bottom 771 of the second bottom vacuum heat insulating panel 77. The chamfered portion 773 is formed to cut off the left and right corners of the front portion of the bottom portion 771 in order to avoid the screw hole 649. By this chamfered portion 773, the second bottom vacuum heat insulation panel 77 is formed so as to avoid the screw hole 649 toward the center side of the bottom heat insulation wall 47.

  As shown in FIG. 6, the screw 69 is passed through the through hole 671 from below the leg support member 67 and screwed into the screw hole 649 of the bottom plate 64. Thereby, the leg support member 67 is attached to the bottom of the heat insulating box 40 so as to protrude downward from the lower surface of the bottom plate 64. The screw hole 649 may be a through hole in which a female screw is not formed, and the leg support member 67 may be attached to the bottom of the heat insulating box 40 using a screw 69 and a nut (not shown). As shown in FIG. 1, the concave portion 644 and the leg support member 67 of the bottom plate 64 are at least partially in the protruding direction of the concave portion 644 and the leg support member 67, that is, in the thickness direction of the concave portion 644 and the leg support member 67. All are overlapping. In this case, the dimension in the thickness direction of the leg support member 67 is the direction in which the leg member 68 is attached to the leg support member 67, that is, the upper and lower sides of the leg support member 67, as indicated by the symbol L in FIGS. It means the dimension of the direction.

  As shown in FIG. 6, the leg member 68 includes a leg member 681 and a screw portion 682. The leg member 681 is, for example, a columnar shape, and is a part that contacts the installation surface of the refrigerator 10. The threaded portion 682 has a rod shape extending upward from the center portion of the leg member 681, and a male screw is formed on the rod-shaped outer peripheral portion. The leg member 68 is attached to the leg support member 67 by screwing the screw part 682 into the screw hole part 672 of the leg support member 67. The user can adjust the protrusion amount of the leg member 68 by increasing / decreasing the screwing amount of the screw portion 682 with respect to the screw hole portion 672, thereby adjusting the inclination of the refrigerator 10 in the front-rear direction and the left-right direction. . In this case, the height position of the lower surface of the recess 644 of the bottom plate 64, that is, the outer surface, is set to be equal to the height position of the lower surface of the leg support member 67.

  The back plate 65 constitutes the rear outer surface of the heat insulating box 40 and is attached to the back surface of the inner box 50 as shown in FIG. As shown in FIGS. 1 and 4, a first back vacuum heat insulation panel 78, a second back vacuum heat insulation panel 79, and urethane foam 43 are provided between the back plate 65 and the inner box 50. Thus, the back heat insulating wall 48 is configured. The back plate 65 is formed in a plate shape as a whole. As shown in FIGS. 1 and 4, the side portions around the back plate 65 are connected to the rear edge portions of the left plate 61, the right plate 62, the ceiling plate 63, and the bottom plate 64.

  As shown in FIG. 8, the first back vacuum heat insulation panel 78 has a rectangular plate shape that is slightly smaller than the back plate 65 and is long in the vertical direction, and is substantially the entire rear surface of the heat insulation box 40 in the cabinet. It is formed in the size which covers. The first back vacuum heat insulation panel 78 is bonded to the inner side surface of the back plate 65, that is, the surface on the storage chamber side by, for example, double-sided tape or hot melt.

  Moreover, the 1st back part vacuum heat insulation panel 78 has the back groove | channel 781 in the backplate 65 side, as shown in FIG. For example, two back grooves 781 are provided on the left and right sides of the first back vacuum heat insulation panel 78, and are formed to extend in the vertical direction. The heat radiating pipe 32 constituting a part of the refrigeration cycle is accommodated in a space formed between the back groove 781 and the back plate 65. In other words, two vacuum heat insulating panels 78 and 79 are provided between the refrigeration cooler 21 and the heat radiating pipe 32. Therefore, the refrigeration cooler 21 is less susceptible to the heat radiation of the heat radiating pipe 32.

  The second back vacuum heat insulation panel 79 is smaller than the first back vacuum heat insulation panel 78 and is thinner than the first back vacuum heat insulation panel 78. The second back vacuum heat insulation panel 79 is bonded to the inner surface of the first back vacuum heat insulation panel 78 by, for example, double-sided tape or hot melt. In this case, the first back vacuum heat insulation panel 78 and the second back vacuum heat insulation panel 79 may be the same or different in material and manufacturing method.

  The second back vacuum heat insulation panel 79 is provided so as to cover a storage room in the freezing temperature zone, that is, the ice making room 13, a small freezing room (not shown), and a part of the rear of the freezing room 14. In this case, as shown in FIG. 8, the second back vacuum heat insulation panel 79 is formed in a size that covers the entire rear side of the refrigeration cooler 21 in the vertical direction and the horizontal direction. That is, the second back vacuum heat insulation panel 79 is located behind the refrigeration cooler chamber 26 and covers the entire rear of the refrigeration cooler 21. In addition, the 2nd back part vacuum heat insulation panel 79 may not be arrange | positioned ranging over each store room of a freezing temperature zone, and may cover only a part of back of the freezer compartment 14 etc.

  In the present embodiment, the refrigeration cooler 21 is arranged on one side in the left-right direction, in this case, on the left side when viewed from the front side of the refrigerator 10. Therefore, the second back vacuum heat insulation panel 79 is also arranged on the one side in this case in accordance with the refrigeration cooler 21, in this case on the left side. As described above, the portion of the back heat insulating wall 48 corresponding to the rear of the refrigeration cooler 21 has a double structure in which the two vacuum heat insulating panels 78 and 79 are provided. For this reason, in the back heat insulation wall 48, the portion corresponding to the rear of the refrigeration cooler 21, that is, the portion overlapping the refrigeration cooler 21, has higher heat insulation performance than the other portions. Therefore, the refrigeration cooler 21 is less susceptible to heat from the rear.

  As shown in FIGS. 4 and 9, a thin plate 80 is provided on the inner side of the second back vacuum heat insulation panel 79, that is, on the surface on the inner box 50 side. The thin plate 80 functions as a protective member for preventing the second back vacuum heat insulation panel 79 from coming into direct contact with the inner box 50 and thereby preventing the second back vacuum heat insulation panel 79 from being damaged. That is, the thin plate 80 is provided on the surface on the side where the foamed urethane 43 flows with respect to the second back vacuum heat insulating panel 79. The thin plate 80 is made of, for example, foamed polyethylene, and is a plate material that can be slightly deformed by an external load. The thin plate 80 can absorb the impact to some extent by being deformed, for example, when an impact is applied from the outside. The thin plate 80 is bonded to the second back vacuum heat insulation panel 79 by, for example, a double-sided tape. The thin plate 80 has the same size as the second back vacuum heat insulation panel 79 and covers substantially the entire inner surface of the second back vacuum heat insulation panel 79, that is, the surface on the inner box 50 side. The thin plate 80 may be bonded not to the second back vacuum heat insulation panel 79 but to the inner box 50 side.

  In the back heat insulation wall 48, the distance between the second back vacuum heat insulation panel 79 and the inner box 50 is shortened by adopting a double structure of the back vacuum heat insulation panels 78 and 79. Then, the second back vacuum heat insulation panel 79 and the inner box 50 come into contact with each other, and the second back vacuum heat insulation panel 79 may be damaged. Therefore, by providing the thin plate 80 between the inner box 50 and the second back vacuum heat insulation panel 79, the second back vacuum heat insulation panel 79 can be prevented from coming into contact with the inner box 50 and being damaged.

  In the refrigerator 10 of the above embodiment, the heat insulating box 40 is located on both sides of the bottom heat insulating wall 47 constituting the bottom of the storage room and the opening 401 side of the bottom heat insulating wall 47, and is below the bottom heat insulating wall 47. A leg member 68 provided so as to protrude to the opposite side of the storage chamber, and a leg support member 67 provided on the bottom heat insulating wall 47 and to which the leg member 68 is attached. The bottom heat insulating wall 47 is provided on the side of the bottom plate 64 between the inner box 50 constituting the inside of the heat insulation box 40, the bottom plate 64 constituting the outside of the bottom of the heat insulation box 40, and the inner box 50 and the bottom plate 64. The first bottom vacuum heat insulation panel 76 is provided between the inner box 50 and the bottom plate 64 on the inner box 50 side of the first bottom vacuum heat insulation panel 76 so as to cover the first bottom vacuum heat insulation panel 76. A second bottom vacuum insulation panel 77. The bottom plate 64 has a mounting portion to which the leg support member 67 is attached, that is, a screw hole 649, and the screw hole 649 is avoided to the center side of the bottom heat insulating wall 47 and at least partially overlaps in the thickness direction of the leg support member 67. And a recess 644 that is formed to project and accommodate the first bottom vacuum heat insulation panel 76. And the 2nd bottom part vacuum heat insulation panel 77 is formed so that it may avoid to the center side of the bottom part heat insulation wall 47 in this case so that the screw hole 649 may be avoided.

  Here, a screw 69 for attaching the leg support member 67 protrudes from an attachment portion to which the leg support member 67 is attached, that is, a screw hole 649. In this case, when the vacuum heat insulation panel and the screw 69 are in contact, the vacuum heat insulation panel may be damaged. For this reason, the vacuum heat insulation panel provided in the bottom heat insulation wall 47 needs to have a shape that avoids the attachment portion 649 in order to avoid interference with the attachment portion 649. In this case, if the vacuum heat insulation panel is configured to escape above the attachment portion 649, the thickness of the bottom heat insulation wall 47 is increased, and the internal volume of the refrigerator 10 is compressed. On the other hand, when the vacuum heat insulation panel is configured to escape inside the attachment portion 649, that is, in the center direction of the bottom heat insulation wall 47, the vacuum heat insulation panel is reduced, and as a result, the heat insulation performance is lowered.

  Therefore, in the present embodiment, the bottom plate 64 is formed with a recess 644. The concave portion 644 is formed by avoiding the screw hole 649 toward the center of the bottom heat insulating wall 47 and projecting downward so that at least a part thereof overlaps in the thickness direction of the leg support member 67. The first bottom vacuum heat insulation panel 76 is accommodated in the recess 644, and the second bottom vacuum heat insulation panel 77 is formed so as to avoid the screw hole 649 toward the center of the bottom heat insulation wall 47. The storage room side of the vacuum heat insulation panel 76 is covered.

  According to this, the first bottom vacuum insulation panel 76 and the second bottom vacuum insulation panel 77 are formed avoiding the screw holes 649. Therefore, it is possible to prevent the bottom vacuum heat insulating panels 76 and 77 from being damaged by a screw or the like protruding from the screw hole 649. Further, the bottom heat insulating wall 47 has a double structure in which the first bottom vacuum heat insulating panel 76 and the second bottom vacuum heat insulating panel 77 are provided. The performance can be increased. Further, the recess 644 that accommodates the first bottom vacuum heat insulation panel 76 is formed to protrude downward so that at least a part thereof overlaps in the thickness direction of the leg support member 67. Therefore, even if two vacuum heat insulation panels 76 and 77 are provided on the bottom heat insulation wall 47, the thickness of the bottom heat insulation wall 47 can be suppressed, and as a result, compression of the internal volume can be suppressed. As a result, the refrigerator 10 can improve the heat insulation performance while maintaining the internal volume and ensuring the safety of the vacuum heat insulation panels 76 and 77 provided in the bottom heat insulation wall 47, thereby reducing the power consumption. it can.

  In the recess 644, the foam heat insulating material 43 is filled in the outer peripheral portion of the first bottom vacuum heat insulating panel 76. According to this, the outer peripheral part of the 1st bottom part vacuum heat insulation panel 76 is filled with the foam heat insulating material 43 which has heat insulation. Therefore, the heat insulating performance of the bottom heat insulating wall 47 can be further improved.

  The second bottom vacuum heat insulation panel 77 is thicker than the first bottom vacuum heat insulation panel 76, that is, the heat insulation performance is set high. According to this, the heat insulation performance as the bottom part heat insulation wall 47 whole can be made higher.

  The bottom plate 64 has a hole 647 that communicates the inside and the outside of the bottom heat insulating wall 47. According to this, the gas generated when the foamed urethane 43 injected into the bottom heat insulating wall 47 is foamed and solidified can be discharged to the outside through the hole 647. Thereby, the internal pressure in the bottom heat insulating wall 47 is increased by the gas, and the bottom heat insulating wall 47 can be prevented from being deformed.

  The hole 647 is provided in a portion of the recess 644 opposite to the opening 401 and not provided with the first bottom vacuum heat insulation panel 76, that is, in the gap 648 in the rear portion. Thereby, when filling the foamed urethane 43 into the heat insulation box 40, the heat insulation box 40 is disposed with the opening 401 on the lower side, and thus the hole 647 can be positioned on the upper side. In this case, the liquid foamed urethane 43 injected into the heat insulating box 40 is accumulated from the opening 401 side, that is, the lower side, that is, the side opposite to the hole 647. Therefore, it is possible to prevent the hole 647 from being blocked by the foamed urethane 43 until the final stage in which the foamed urethane 43 is injected. As a result, the gas generated when the urethane foam 43 is filled can be efficiently discharged.

  The refrigerator 10 includes a refrigeration room 11 and a vegetable room 12 as storage rooms in a refrigeration temperature zone, and an ice making room 13, a small freezing room (not shown), and a freezing room 14 as storage rooms in a refrigeration temperature zone. In this case, the storage room in the refrigeration temperature zone and the storage room in the refrigeration temperature zone are different in temperature zone, so that the thermal insulation performance required for the portion corresponding to the storage room in the back heat insulating wall 48 is also different. That is, in the back heat insulating wall 48, higher heat insulating performance is required in the portion where the storage chambers 13 and 14 in the refrigeration temperature zone are formed than in the portion where the storage chambers 11 and 12 in the refrigeration temperature zone are formed. In this case, when the heat insulation performance of the back heat insulation wall 48 is adapted to the heat insulation performance required for the storage rooms 11 and 12 in the refrigerated temperature zone, the heat insulation performance required in the storage rooms 13 and 14 in the refrigeration temperature zone is satisfied. I can't. On the other hand, if the heat insulating performance of the back heat insulating wall 48 is adapted to the heat insulating performance required for the storage chambers 13 and 14 in the freezing temperature zone, it becomes excessive, leading to an increase in cost.

  Therefore, in the heat insulation box 40 of the refrigerator 10 of the present embodiment, the back heat insulation wall 48 includes a storage room in the refrigeration temperature zone (in this case, the refrigeration room 11 and the vegetable room 12) and a storage room in the freezing temperature zone (in this case). , The ice making chamber 13, the small freezing chamber (not shown), and the freezing chamber 14), a first back vacuum heat insulation panel 78 that covers both, and a freezing temperature zone storage chamber (in this case, the ice making chamber 13, the small freezing chamber not shown) And a second back vacuum insulation panel 79 that covers at least a part of the freezer compartment 14). According to this, in the back heat insulating wall 48, the portions corresponding to the storage rooms 13 and 14 in the freezing temperature zone where higher heat insulating performance is required are made into a double structure of the vacuum heat insulating panels 78 and 79 to enhance the heat insulating performance. ing. On the other hand, the portion of the back heat insulating wall 48 corresponding to the storage rooms 11 and 12 in the refrigerated temperature zone where high heat insulating performance is not required is constituted by a single vacuum heat insulating panel 78. Thereby, the back heat insulation wall 48 can be made into a heat insulation performance suitable for each temperature zone, and as a result, the heat insulation performance of the heat insulation box 40 as a whole is improved and the power consumption is reduced, and the cost is increased. Can be suppressed.

  The first back vacuum heat insulation panel 78 is thicker than the second back vacuum heat insulation panel 79, that is, the heat insulation performance is set high. According to this, the back part heat insulation wall 48 can be made into a thing with higher heat insulation performance as a whole.

  The second back vacuum insulation panel 79 covers the side opposite to the opening 401 of the refrigeration cooler 21, that is, the rear side. According to this, in the back heat insulation wall 48, the rear of the refrigeration cooler 21 that is cooled to a lower temperature and requires high heat insulation performance is made into a double structure provided with two vacuum heat insulation panels 78 and 79. Insulation performance can be made higher than other parts. As described above, the back heat insulating wall 48 locally increases the heat insulating performance of a portion requiring high heat insulating performance. Thereby, the increase in cost can be suppressed, improving the heat insulation performance as the whole heat insulation box 40, and reducing power consumption.

  A thin plate 80 is provided on the inner box 50 side of the second back vacuum heat insulation panel 79. The thin plate 80 functions as a protective member that prevents the second back vacuum heat insulation panel 79 from directly contacting the inner box 50. According to this, it can prevent that the 2nd back part vacuum heat insulation panel 79 contacts the inner case 50, and is damaged.

  Further, the heat insulating box 40 of the refrigerator 10 includes a left heat insulating wall 44 and a right heat insulating wall 45 that form left and right side walls with respect to the opening 401. The left side heat insulating wall 44 is smaller than the first left side vacuum heat insulating panel 71 covering the left side of the storage chamber and the second left side vacuum covering the left side of the refrigeration cooler 21. And a heat insulating panel 72. The right side heat insulation wall 45 is smaller than the first right side vacuum heat insulation panel 73 covering the right side of the storage chamber and the first right side vacuum heat insulation panel 73, and the second right side vacuum covering the right side of the refrigeration cooler 21. And a heat insulating panel 74.

  According to this, in the left side heat insulating wall 44, the left side of the refrigeration cooler 21 that is cooled to a lower temperature and requires high heat insulating performance is provided with a double structure in which two vacuum heat insulating panels 71 and 72 are provided. Thus, the heat insulation performance can be made higher than other portions. Similarly, the right side heat insulating wall 45 has a double structure provided with two vacuum heat insulating panels 73 and 74 on the right side of the refrigeration cooler 21 that is cooled to a lower temperature and requires high heat insulating performance. Insulation performance can be made higher than other parts. As described above, the left-side heat insulating wall 44 and the right-side heat insulating wall 45 locally increase the heat insulating performance of a portion requiring high heat insulating performance. An increase in cost can be suppressed while improving the heat insulating performance of the heat insulating box 40 as a whole and reducing the amount of power consumption.

  The first left side vacuum heat insulation panel 71 is thicker than the second left side vacuum heat insulation panel 72, that is, the heat insulation performance is set high. Similarly, the 1st right side vacuum insulation panel 73 is thicker than the 2nd right side vacuum insulation panel 74, ie, heat insulation performance is set high. According to this, the left side heat insulating wall 44 and the right side heat insulating wall 45 can be made to have higher heat insulating performance as a whole.

  The second bottom vacuum heat insulation panel 77 (second vacuum heat insulation panel) has a bent portion 774 formed by bending a plate-like vacuum heat insulation panel. Here, in order to improve the bendability at the time of manufacturing the second bottom vacuum heat insulation panel 77, it is conceivable to form the second bottom vacuum heat insulation panel 77 thinly. In this case, instead of thinning the second bottom vacuum heat insulation panel 77 to improve the bendability, the heat insulation performance of the second bottom vacuum heat insulation panel 77 is sacrificed by the thinning. Therefore, in the present embodiment, the first bottom vacuum heat insulation panel 76 (first vacuum heat insulation panel) is disposed at a position avoiding the bent portion 774. Thereby, even if the bending performance is improved at the sacrifice of the heat insulation performance of the second bottom vacuum heat insulation panel 77, sufficient heat insulation performance can be secured for the bottom heat insulation wall 47.

In the above embodiment, the method for differentiating the heat insulating performance of the two vacuum heat insulating panels having a double structure is not limited to the method of increasing the thickness of the vacuum heat insulating panel, and an organic material is used as the core material. Or a method of changing the diameter of the fiber material used for the core material may be employed.
The leg support member 67 is not limited to the configuration that is attached to the bottom plate 64 by the screw 69. For example, a configuration in which the leg support member 67 is attached to the bottom plate 64 by locking a part of the leg support member 67 with a hole or the like formed in the bottom plate 64 may be employed.

The foam heat insulating material 43 is not limited to the urethane foam, and may be any heat insulating material having the same performance as the urethane foam.
The protective member is not limited to the thin plate 80, and may be a so-called soft tape, for example.
The number and arrangement of the storage chambers are not limited to those in the above embodiment. For example, a refrigerator room, that is, a storage room of a refrigeration temperature zone is provided at the top of the refrigerator 10, and a vegetable room, ie, a storage room of a refrigeration temperature zone, is provided at the bottom of the refrigerator 10, and the freezing temperature is between these refrigeration rooms and the vegetable room. A configuration may be provided in which a belt storage chamber is provided.

The refrigerator 10 of the above embodiment includes two coolers: a refrigeration cooler 20 for cooling a storage room in a refrigeration temperature zone, and a refrigeration cooler 21 for cooling the storage room in a refrigeration temperature zone. However, it is not limited to this configuration. For example, the structure which cools the storage room of a refrigerator temperature zone and the storage room of a freezing temperature zone using one cooler may be sufficient.
The outer box 60 is configured by combining the left plate 61, the right plate 62, the ceiling plate 63, and the bottom plate 64, but is not limited thereto. For example, a plurality of plates may be integrally formed by bending a single plate.
For each heat insulating wall, a double structure having two vacuum heat insulating panels has been described as an example. However, the number of vacuum heat insulating panels is not limited to two, and a plurality of three or more vacuum heat insulating panels are provided in an overlapping manner. Insulating walls may be configured.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 10 is a refrigerator, 11 is a refrigerator room (storage room), 12 is a vegetable room (storage room), 13 is an ice making room (storage room), 14 is a freezer room (storage room), and 20 is a refrigerator for refrigeration ( Cooler), 21 is a refrigeration cooler (cooler), 40 is a heat insulation box, 401 is an opening, 43 is urethane foam (foam insulation), 44 is a left heat insulation wall (side heat insulation wall), 45 Is the right side heat insulating wall (side heat insulating wall), 47 is the bottom heat insulating wall, 48 is the back heat insulating wall, 50 is the inner box, 64 is the bottom plate, 644 is the recess, 647 is the hole, 649 is the screw hole (mounting part), 67 is a leg support member, 68 is a leg member, 71 is a first left side vacuum heat insulation panel (first side vacuum heat insulation panel), 72 is a second left side vacuum heat insulation panel (second side vacuum heat insulation panel), 73 Is the first right side vacuum insulation panel (first side vacuum insulation panel), 74 is the second right side vacuum insulation panel (second Vacuum insulation panel), 76 is a first bottom vacuum insulation panel, 77 is a second bottom vacuum insulation panel, 774 is a bent portion, 78 is a first back vacuum insulation panel, 79 is a second back vacuum insulation panel, and 80 is a thin plate (Protective member) is shown.

Claims (7)

A heat insulation box having a storage room in a refrigerated temperature zone and a storage room in a refrigeration temperature zone, and an opening communicating the inside and outside of the storage room,
The insulation box is
A back heat insulating wall constituting a wall portion on the opposite side of the opening,
The back insulation wall is
A first back vacuum insulation panel that covers both the storage room of the refrigeration temperature zone and the storage room of the refrigeration temperature zone;
A second back vacuum thermal insulation panel covering at least a part of the storage room in the freezing temperature zone;
Having a refrigerator.   The refrigerator according to claim 1, wherein the first back vacuum heat insulation panel has higher heat insulation performance than the second back vacuum heat insulation panel. A cooler for cooling the storage room in the freezing temperature zone,
The refrigerator according to claim 1 or 2, wherein the second back vacuum insulation panel covers an opposite side of the cooler from the opening of the storage chamber.   The protective member which prevents that the said 2nd back part vacuum heat insulation panel contacts the said inner box directly in the said inner box side of the said 2nd back part vacuum panel is provided. Refrigerator. A heat-insulating box having a storage room for storing the storage, and an opening communicating the inside and the outside of the storage room;
A cooler for cooling the storage chamber,
The insulation box is
A side heat insulating wall constituting a side wall portion with respect to the opening;
The side heat insulating wall is
A first side vacuum insulation panel covering the side of the storage chamber;
A refrigerator having a second side vacuum heat insulation panel smaller than the first side vacuum heat insulation panel and covering a side of the cooler.   The refrigerator according to claim 5, wherein the first side vacuum heat insulating panel has higher heat insulating performance than the second side vacuum heat insulating panel. A heat insulation box having a storage chamber for storing the storage, and an opening communicating the inside and the outside of the storage chamber;
The insulation box is
Having a heat insulating wall constituting the wall of the storage room;
The insulating wall is
An inner box constituting the inside of the heat insulating box,
An outer box constituting the outside of the heat insulation box,
A first vacuum heat insulation panel provided between the inner box and the outer box;
A second vacuum heat insulation panel provided so as to cover the first vacuum heat insulation panel between the inner box and the outer box,
The second vacuum heat insulation panel has a bent portion formed by bending a plate-like vacuum heat insulation panel,
The said 1st vacuum heat insulation panel is the refrigerator arrange | positioned in the position which avoided the said bending part.

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