JP2020125903A - refrigerator - Google Patents

Abstract

To improve heat insulation performance.SOLUTION: A refrigerator comprises a heat insulating box body comprising a storage chamber in a refrigerating temperature zone, a storage chamber in a freezing temperature zone, and an opening part for allowing communication between the interior and the exterior of the storage chambers. The heat insulating box body comprises an inner box constituting the inside of the heat insulating box body, an outer box constituting the outside of the heat insulating box body, and a vacuum heat insulating panel provided between the inner box and the outer box. A protective member for preventing the vacuum heat insulating panel from directly coming into contact with the inner box and capable of being deformed by a load from the exterior is provided on the vacuum heat insulating panel on the side of the inner box.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to a refrigerator.

2. Description of the Related Art In recent years, as a heat insulating material for a heat insulating box of a refrigerator, there has been used a vacuum heat insulating panel in place of or in combination with a conventional foam heat insulating material such as urethane foam. For example, a vacuum insulation panel is made by compressing and hardening a laminated material of inorganic fibers such as glass wool into a packaging bag of synthetic resin film such as polyethylene having gas barrier performance, and then evacuating the interior to seal under reduced pressure. It has been configured.

The vacuum insulation panel is superior in heat insulation performance to the conventional foam insulation material 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 than in the case where only the urethane foam is used as the heat insulating material. As a result, the power consumption of the refrigerator can be reduced and the internal volume of the refrigerator can be increased.

JP, 2011-89734, A

However, since it is difficult to form the vacuum heat insulating panel into a complicated shape, the vacuum heat insulating panel is generally formed into a plate shape. Therefore, in the conventional heat insulation box of the refrigerator, one simple plate-shaped vacuum heat insulation panel is provided for each heat insulation wall. Therefore, the conventional heat insulating box has room for improvement in the structure of the vacuum heat insulating panel in order to improve the heat insulating performance.
Therefore, a refrigerator having improved heat insulation performance is provided.

The refrigerator of the embodiment includes a heat-insulating box having a storage chamber for storing a storage item and an opening communicating between the inside and the outside of the storage chamber. The heat-insulating box body is provided with a bottom heat-insulating wall that constitutes the bottom of the storage chamber, and legs that are located on both sides of the bottom heat-insulating wall on the side of the opening and project downward from the bottom heat-insulating wall. A member, and a leg support member provided on the bottom heat insulating wall 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. A first bottom vacuum heat insulation panel, and a first bottom vacuum heat insulation panel provided on the inner box side of the first bottom vacuum heat insulation panel between the inner box and the bottom plate so as to cover the first bottom vacuum heat insulation panel; 2 bottom vacuum insulation panels. The bottom plate is a mounting portion to which the leg support member is attached, and a recessed portion that is formed to project downward so that at least a part of the leg support member overlaps in the thickness direction and that accommodates the first bottom vacuum heat insulation panel, Have. The second bottom vacuum insulation panel is formed to avoid the mounting portion.

Further, the refrigerator includes a heat insulating box having a refrigerating temperature zone storage room and a freezing temperature zone storage room, and an opening that communicates the inside and the outside of the storage room. The heat-insulating box has a back heat-insulating wall that forms a wall opposite to the opening. The back heat insulation wall includes a first back vacuum heat insulation panel that covers both the cold storage zone storage chamber and the freezing temperature zone storage chamber, and a second back vacuum chamber that covers at least a part of the freezing temperature zone storage chamber. And a heat insulating panel.

In addition, the refrigerator, a storage chamber for storing the storage, an insulating box having an opening that communicates the inside and the outside of the storage chamber, a cooler for cooling the storage chamber, Equipped with. The heat-insulating box has a side heat-insulating wall that forms a wall part lateral to the opening. The side heat insulating wall is smaller than the first side vacuum heat insulating panel that covers the side of the storage chamber, and the 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 insulating box having a storage chamber for storing a storage item and an opening that communicates the inside and the outside of the storage chamber. The heat insulating box has a heat insulating wall forming a wall portion of the storage chamber. The heat insulation wall includes an inner box that forms the inside of the heat insulation box, an outer box that forms 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-shaped vacuum heat insulation panel. The first vacuum heat insulation panel is arranged at a position avoiding the bent portion.

A vertical sectional side view showing an example of a cross section of a refrigerator of one embodiment. Insulation box perspective view Exploded perspective view of insulation box Cross-sectional plan view taken along line X4-X4 in FIG. Perspective view showing the configuration around the bottom plate Exploded perspective view showing the configuration around the bottom plate Perspective view showing the configuration around the first bottom vacuum insulation panel Front view showing the configuration around the back plate Vertical side view showing the structure of the lower part of the back heat insulation wall Vertical side view showing the configuration around the front part of the bottom plate 10 is a vertical sectional front view taken along line X11-X11 in FIG.

Hereinafter, a refrigerator including a heat insulating box according to an embodiment will be described with reference to the drawings.
As shown in FIG. 1, the refrigerator 10 is configured to have a plurality of storage chambers inside a heat-insulating box body 40 having a vertically long rectangular box shape with an open front surface. 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 side opposite to the opening 401, that is, the right side in FIG. 1, is the rear side of the refrigerator 10. Further, the vertical direction with respect to the gravity direction when the refrigerator 10 is set on the floor surface in the posture of FIG. 1 is the vertical direction of the refrigerator 10. The left-right direction when the refrigerator of FIG. 1 is viewed from the front side is the left-right direction of the refrigerator 10.

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

Both the refrigerating compartment 11 and the vegetable compartment 12 are storage compartments in the refrigerating temperature zone, and are maintained in the 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 refrigerating compartment door 16 has heat insulating properties and is provided on the front side of the refrigerating compartment 11. The refrigerating compartment door 16 is a hinge opening/closing door, and opens and closes the front surface of the refrigerating compartment 11. The vegetable compartment door 17 has heat insulating 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 a container 171 is connected, and opens and closes the front surface of the vegetable compartment 12.

The ice making chamber 13, the small freezing chamber (not shown), and the freezing chamber 14 are all storage chambers in the freezing temperature range, and are maintained in the negative temperature range of -10 to -20°C, for example. The vegetable compartment 12, the ice making compartment 13, and a small freezer compartment (not shown) are vertically partitioned by a heat insulating partition wall 41. The heat insulating partition wall 41 is provided integrally with the heat insulating box body 40. The refrigerator 10 includes an ice making chamber door 18, a small freezing chamber door (not shown), and a freezing chamber door 19.

The ice making chamber door 18 has heat insulating properties and is provided on the front side of the ice making chamber 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. The small freezer compartment door (not shown) has heat insulating 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 a heat insulating property and is provided on the front side of the freezer compartment 14. The freezer compartment door 19 is a drawer type door in 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 refrigerating cooler 20, a freezing cooler 21, a compressor 22, a condenser (not shown), and the like. The refrigerating cooler 20 generates cold air for cooling the refrigerating compartment 11 and the vegetable compartment 12, which are storage compartments in the refrigerating temperature zone. The freezing cooler 21 generates cold air for cooling the ice making chamber 13, which is a storage chamber in the freezing temperature zone, 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 refrigerating cooler chamber 23, a cool air duct 24, and a refrigerating blower fan 25. The refrigerating cooler chamber 23 is provided behind the lower part of the refrigerating chamber 11. The refrigerating cooler 20 and the refrigerating blower fan 25 are provided in the refrigerating cooler chamber 23. One side of the refrigerating 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 refrigerating compartment 11 and has a plurality of outlets 241 communicating with the refrigerating compartment 11. The refrigerator compartment 11 and the vegetable compartment 12 communicate with each other through a communication port (not shown).

When the refrigeration blower fan 25 is driven, the air in the vegetable compartment 12 is sucked into the refrigerating cooler compartment 23 from the suction port 231 as shown by the arrow in FIG. 1. The sucked air is cooled when passing through the refrigerating cooler 20. Then, the cool air cooled by the refrigerating cooler 20 is blown into the refrigerating compartment 11 from the plurality of outlets 241 through the cool air duct 24 by the blowing action of the refrigerating blower fan 25. As a result, the refrigerator compartment 11 is cooled to the temperature in the refrigerator temperature zone. Then, a part of the cold air blown into the refrigerating compartment 11 is also supplied to the vegetable compartment 12. Thereby, the vegetable compartment 12 is also cooled to the temperature of the refrigerating temperature zone. Then, the air that has cooled the refrigerating compartment 11 and the vegetable compartment 12 is sucked into the refrigerating cooler compartment 23 again through the suction port 231. In this way, cold air is circulated.

The refrigerator 10 includes a freezing cooler chamber 26 and a freezing blower fan 27. The freezing cooler chamber 26 is provided behind the freezing temperature zone storage chamber, that is, the ice making chamber 13, a small freezing chamber (not shown), and the freezing chamber 14. The freezing cooler 21 and the freezing blower fan 27 are provided in the freezing cooler chamber 26. In this case, as shown in FIG. 4, the freezing cooler 21 is provided in the freezing cooler chamber 26 so as to be slightly biased to the left side with respect to the center in the left-right direction. As shown in FIG. 1, the freezing cooler chamber 26 has an inlet 261 and an outlet 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 outlet 262 is provided above the inlet 261 and communicates with the ice making chamber 13, the small freezing chamber (not shown), and the freezing chamber 14.

When the freezing fan 27 is driven, the cold air generated by the freezing cooler 21 is supplied from the outlets 262 into the ice making chamber 13, the small freezing chamber (not shown), and the freezing chamber 14 and then sucked. Circulation such as returning from the port 261 to the inside of the freezing cooler chamber 26 is performed. As a result, the ice making chamber 13, the small freezing chamber (not shown), and the freezing chamber 14 are cooled to the temperatures in the freezing temperature zone.

The refrigerator 10 includes a control device 31. The control device 31 controls the driving of the compressor 22, the refrigeration blower fan 25, the freezing blower fan 27, and the like to control the overall operation of the refrigerator. In this case, the control device 31 is provided on the ceiling above the refrigerating compartment 11. The refrigerator 10 also includes a drain gutter 28, a drain pipe 29, and an evaporation dish 30. The drain gutter 28 is provided below the freezing cooler 21 and is for receiving defrost water generated when the freezing cooler 21 is defrosted. The evaporation dish 30 is provided above the compressor 22 in the machine room 42. The drain pipe 29 connects the drain gutter 28 and the evaporation tray 30. The defrost water generated from the refrigerating cooler 21 is dropped on the drain gutter 28 and guided to the evaporating dish 30 through the drain pipe 29. Then, the defrosted water guided to the evaporation dish 30 is heated by heat generated in 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 an inner box 50 made of synthetic resin and an outer box 60 made of metal. 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 the spaces to be 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, a left plate 61, a right plate 62, a ceiling plate 63, a bottom plate 64, and a back plate 65, as shown in FIG. .. A gap is formed between the inner box 50 and the outer box 60, and a heat insulating material such as a foamed heat insulating material 43 or a vacuum heat insulating panel is provided in the clearance. The foamed 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. The vacuum heat insulating panel is a plate having almost no flexibility.

Specifically, as shown in FIG. 3, the left plate 61 constitutes the left outer side surface of the heat insulating box body 40, and is attached to the left side surface portion of the inner box 50. Then, as shown in FIGS. 1 and 4, a first left side vacuum heat insulation panel 71, a second left side vacuum insulation panel 72, and a urethane foam 43 are provided between the left plate 61 and the inner box 50. Thereby, the left side heat insulation wall 44 is configured. The first left-side vacuum heat insulation panel 71 is formed in a size so as to cover the entire left side surface of the heat insulation box 40 inside the refrigerator.

The first left side vacuum heat insulation panel 71 is adhered to the left plate 61 by, for example, a double-sided tape or hot melt. The second left side vacuum heat insulation panel 72 is adhered 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, a double-sided tape or hot melt. In this case, the first left side vacuum heat insulation panel 71 and the second left side vacuum heat insulation panel 72 may be made of the same material or different manufacturing methods. For example, regarding the second left side vacuum heat insulation panel 72 arranged at a position closer to the inner box 50 than the first left side vacuum heat insulation panel 71, a packaging bag used for the second left side vacuum heat insulation panel 72 is 1 The material is made stronger or thicker than the packaging bag used for the left side vacuum insulation panel 71. In this way, the first left side vacuum heat insulation panel 71 and the second left side vacuum heat 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, the second left-side vacuum heat insulation panel 72 is formed in a size that covers the left side of the refrigerating cooler 21 in the vertical and front-rear directions, as shown in FIG. 4. That is, in the left side heat insulation wall 44, the part corresponding to the left side of the freezing cooler 21 has a double structure in which two vacuum heat insulation panels 71 and 72 are provided. For this reason, in the left side heat insulation wall 44, the part corresponding to the left side of the freezing cooler 21, that is, the part overlapping with the freezing cooler 21 has higher heat insulating performance than other parts.

Here, when the left side heat insulating wall 44 is filled with the urethane foam 43, the liquid urethane foam 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 the 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 when the second left side vacuum heat insulation panel 72 is provided on the first left side vacuum heat insulation panel 71, it is possible to prevent the second left side vacuum heat insulation panel 72 from interfering with the flow of the liquid urethane foam 43. Therefore, the urethane foam 43 can be efficiently filled.

The first left side vacuum insulation 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 in the front portion and the rear portion of the first left side vacuum heat insulating panel 71, and are formed so as to extend in the vertical direction. The heat dissipation pipe 32 that constitutes a part of the refrigeration cycle is housed in the space formed between the left groove portion 711 and the left plate 61.

In this case, the second left-side vacuum heat insulation panel 72 is provided so as to cover the right side of the rear heat radiation pipe 32 of the front and rear two heat radiation pipes 32 that pass through the left groove portion 711. In other words, the second left-side vacuum heat insulation panel 72 is provided so as to cover the inside of the heat dissipation pipe 32 near the freezing cooler 21 among the plurality of heat dissipation pipes 32 passing through the left groove portion 711. That is, in the left side heat insulating wall 44, the portion corresponding to the heat radiating pipe 32 near the freezing 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 radiation pipe 32 and the freezing cooler 21. For this reason, in the left side heat insulation wall 44, the part corresponding to the heat dissipation pipe 32 near the freezing cooler 21 has higher heat insulation performance than the other parts. Therefore, the freezing cooler 21 is less likely to be affected by the heat radiation of the heat radiation pipe 32.

The right plate 62 constitutes the right outer side surface of the heat insulating box body 40, and is attached to the right side surface portion of the inner box 50 as shown in FIG. 3. The first right side vacuum heat insulating panel 73, the second right side vacuum heat insulating panel 74, and the urethane foam 43 are provided between the right plate 62 and the inner box 50, whereby the right side heat insulating wall 45 is configured. Has been done. The right side heat insulating wall 45 is symmetrical with the left side heat insulating wall 44. That is, the first right-side vacuum heat insulation panel 73 is formed in a size so as to cover the entire right side surface of the heat insulation box 40 inside the refrigerator.

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

The second right side vacuum heat insulation panel 74 is formed smaller than the first right side vacuum heat insulation panel 73. In this case, the second right side vacuum heat insulation panel 74 is formed in a size that covers the right side of the freezing cooler 21 in the up-down and front-rear directions, as shown in FIG. That is, in the right side heat insulation wall 45, the part corresponding to the right side of the freezing cooler 21 has a double structure in which two vacuum heat insulation panels 73 and 74 are provided. For this reason, in the right side heat insulation wall 45, the part corresponding to the right side of the freezing cooler 21, that is, the part overlapping with the freezing cooler 21 has higher heat insulating performance than the other parts. Therefore, the freezing cooler 21 is less likely to be affected by the heat radiation of the heat radiation pipe 32.

Here, when the right side heat insulating wall 45 is filled with the urethane foam 43, the liquid urethane foam 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 determined by the first right side vacuum heat insulation in a portion where the second right side vacuum heat insulation panel 74 is not provided. It is set to be equal to or more than the distance between the panel 73 and the inner box 50. Therefore, even if the second right side vacuum heat insulating panel 74 is provided on the first right side vacuum heat insulating panel 73, it is possible to suppress the second right side vacuum heat insulating panel 74 from interfering with the flow of the liquid urethane foam 43. Therefore, the urethane foam 43 can be efficiently filled.

Further, 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 in the front portion and the rear portion of the first right side vacuum heat insulating panel 73, and are formed so as to extend in the vertical direction. Then, the heat dissipation pipe 32 that constitutes a part of the refrigeration cycle is housed in the space formed between the right groove portion 731 and the right plate 62.

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

The ceiling plate 63 constitutes the upper outer surface of the heat insulating box 40, and is attached to the ceiling surface portion of the inner box 50, as shown in FIG. Then, as shown in FIG. 1, a ceiling-side vacuum heat insulating panel 75 and a urethane foam 43 are provided between the ceiling plate 63 and the inner box 50, whereby a ceiling heat insulating wall 46 is formed. The ceiling-side vacuum heat insulation panel 75 is formed in a size so as to cover the entire ceiling surface of the heat insulation box 40 inside the cabinet. The ceiling-side vacuum heat insulation panel 75 is adhered to the ceiling portion of the inner box 50 or the ceiling plate 63 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 portion of the inner box 50 as shown in FIG. Then, as shown in FIGS. 1 and 6, the first bottom vacuum heat insulation panel 76, the second bottom vacuum heat insulation panel 77, and the urethane foam 43 are provided between the bottom plate 64 and the inner box 50, whereby A bottom heat insulating wall 47 is configured. In this case, the first bottom vacuum heat insulation panel 76 and the second bottom vacuum heat 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 connecting 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 one metal plate.

The large bottom surface portion 641 constitutes the bottom portion of the storage chamber provided at the bottom 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 freezing 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 connecting 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 fall downward from the front end portion of the small bottom surface portion 642.

Further, the large bottom surface portion 641 has a concave portion 644 and an outer peripheral portion 645. The recess 644 is formed by recessing the central portion of the large bottom surface portion 641 downward in a rectangular shape. That is, the recess 644 is formed so as to protrude downward toward the center of the bottom heat insulating wall 47 in the left-right direction so as to avoid a screw hole 649 described later. The outer peripheral portion 645 is formed above the recess 644 so as to surround the outer periphery of the recess 644. In this case, the front edge portion 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 inside of the first bottom vacuum heat insulating panel 76, that is, the height position of the surface on the freezing compartment 14 side is substantially the same as the height position of the surface of the outer peripheral portion 645 on the freezing compartment 14 side, 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 portion 645, or the thickness dimension of the first bottom vacuum heat insulation panel 76 is smaller. large.

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

As shown in FIG. 7, in the rear portion of the recess 644, a plurality of minute holes are formed in 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. 647 is formed. The plurality of holes 647 penetrate the recess 644 to connect 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 urethane foam 43 filled inside the bottom heat insulating wall 47 does not leak to the outside of the heat insulating box 40 due to its surface tension, and the gas generated when the urethane foam 43 solidifies is the heat insulating box 40. The size of the hole 647 is set so that the hole 647 is discharged to the outside.

The heat insulation box body 40 is filled with the urethane foam 43 as follows, for example. Although not shown in detail, the heat insulating 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 insulating box 40. The heat insulating box 40 is arranged on a workbench (not shown) such that the front opening 401 is downward and the injection port (not shown) is upward when the urethane foam is injected. Then, the liquid urethane foam 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 below, that is, from the opening 401 side, and foams inside the wall. At that time, gas is generated by foaming the urethane foam 43. When this gas is accumulated in the wall portion, the pressure inside the wall portion rises, so it is necessary to discharge the gas to the outside. In the present embodiment, the gas generated during the filling of the urethane foam 43 is the hole 647 formed in the rear portion of the heat insulating box body 40, that is, the hole 647 formed so as to be located at the upper portion when the urethane foam 43 is filled. Is discharged from 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 insulation panel 77 integrally has a bottom 771 and a rising portion 772. The second bottom vacuum heat insulation panel 77 is formed, for example, as follows. That is, the mold is pressed against, for example, one vacuum heat insulating panel to form a groove serving as a boundary portion between the bottom portion 771 and the rising portion 772. Then, by bending the vacuum heat insulation panel having the groove formed along the groove, a bent portion 774 serving as a boundary portion between the bent portion 731 and the rising portion 772 is formed in the plate-shaped vacuum heat insulation panel. It Thereby, in the second bottom vacuum heat insulation 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 part of the first bottom vacuum heat insulation panel 76. In this case, the bottom portion 771 is placed on the first bottom vacuum heat insulation panel 76 and a portion of the outer peripheral portion 645 excluding the front side edge portion 646. The lower surface of the bottom portion 771 or the surface opposite to the refrigerating chamber 11 is provided on at least one of the upper surface of the first bottom vacuum heat insulation panel 76 and the portion of the outer peripheral portion 645 excluding the front side edge portion 646. It is adhered by. As described above, the bottom of the heat insulating box 40, that is, the bottom of the freezer compartment 14 is provided with the two vacuum heat insulating panels 76 and 77, and the heat insulating performance is high.

The rising portion 772 is provided so as to rise upward from the rear portion of the bottom portion 771. The rising portion 772 covers the front of the connecting portion 643 of the bottom plate 64, as shown in FIG. 5. That is, the rising portion 772 covers the front surface of the machine room 42, that is, the freezing room 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 having excellent heat insulating properties and flexibility, and are so-called soft tapes. In this case, two first resin foams 661 are provided in the front part of the recess 644 as shown in FIG. 7. When assembling the heat-insulating box body 40, the operator puts the first bottom vacuum heat-insulating panel 76 in the recess 644 such that the front edge of the first bottom vacuum heat-insulating 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 insulation panel 76.

That is, the operator can easily determine the position of the first bottom vacuum heat insulation panel 76 in the recess 644 by placing the first bottom vacuum heat insulation panel 76 against the first resin foam 66 in the recess 644. It can be carried out. Therefore, by providing the first resin foam 661, the positioning work of the first bottom vacuum heat insulating panel 76 with respect to the recess 644 becomes easy. In addition, a plurality of second resin foams 662 are provided in the outer peripheral portion 645 and the connecting portion 643, respectively. In this case, the second resin foam 662 is provided between the second bottom vacuum heat insulation panel 77 and the bottom plate 64.

As shown in FIGS. 5 and 6, the second bottom vacuum heat insulation panel 77 is provided with a plurality of third resin foams 663. The third resin foam body 663 is also made of, for example, a soft tape, like the resin foam bodies 661 and 662 described above. The third resin foam 663 is arranged between the bottom surface portion of the inner box 50 and the second bottom vacuum heat insulation panel 77. As a result, 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, since the third resin foam 663 is provided between the inner box 50 and the second bottom vacuum heat insulation panel 77, the second bottom vacuum heat insulation panel 77 is less likely to contact the bottom of the inner box 50. This can prevent the second bottom vacuum heat insulation panel 77 and the inner box 50 from coming into contact with each other and damaging the second bottom vacuum heat insulation panel 77.

The refrigerator 10 includes a leg support member 67 and a leg member 68, as shown in FIGS. 1, 5, and 6. Two leg support members 67 and two leg members 68 are provided on the left and right sides of the front portion of the bottom surface of the heat insulating box 40. The leg member 68 is formed by bending a metal plate, for example. It is provided so as to project downward from the bottom of the heat insulating box 40, and the projecting length can be adjusted. The user of the refrigerator 10 adjusts the protruding lengths 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, so that the left and right and front and rear directions of the refrigerator 10 are adjusted. 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 by bending and processing a metal plate material, for example. The leg member 68 is attached to the leg support member 67 to support the leg member 68. The leg support member 67 has two through holes 671 and one screw hole 672. The through holes 671 are provided in the central portion and the rear portion of the leg supporting member 67, and are formed by penetrating the leg supporting member 67 in the vertical direction. The screw hole portion 672 is formed in the front portion of the leg support member 67, that is, in front of the two through hole portions 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 portion 672.

Further, two screw holes 649 are formed on each of the left and right sides of the bottom plate 64. 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 chamfer 773 is formed on the bottom 771 of the second bottom vacuum heat insulation panel 77. The chamfered portion 773 is formed so as 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. Due to 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. As a result, the leg support member 67 is attached to the bottom portion of the heat insulating box body 40 so as to project 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 the screw 69 and a nut (not shown). As shown in FIG. 1, the recess 644 of the bottom plate 64 and the leg support member 67 are at least partially in the protruding direction of the recess 644 and the leg support member 67, that is, in the thickness direction of the recess 644 and the leg support member 67. All overlap. In this case, the dimension of the leg support member 67 in the thickness direction means the direction in which the leg member 68 is attached to the leg support member 67, that is, the vertical direction of the leg support member 67, as indicated by reference numeral L in FIGS. 1 and 10. It means the dimension in the direction.

As shown in FIG. 6, the leg member 68 has a leg member 681 and a screw portion 682. The leg member 681 is, for example, a columnar shape, and is a portion that contacts the installation surface of the refrigerator 10. The screw portion 682 has a rod shape extending upward from the central 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 portion 682 into the screw hole portion 672 of the leg support member 67. The user can adjust the protrusion amount of the leg member 68 by increasing or decreasing the screwing amount of the screw portion 682 with respect to the screw hole portion 672, and 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. Then, as shown in FIGS. 1 and 4, etc., a first back vacuum heat insulation panel 78, a second back vacuum heat insulation panel 79, and a urethane foam 43 are provided between the back plate 65 and the inner box 50. The back heat insulating wall 48 is configured by the above. The back plate 65 is formed in a plate shape as a whole. Then, as shown in FIGS. 1 and 4, the peripheral side portions of 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, respectively.

As shown in FIG. 8, the first back vacuum heat insulation panel 78 is a rectangular plate shape that is one size smaller than the back plate 65 and is long in the up-down direction. Is formed to cover the. The first back vacuum heat insulation panel 78 is adhered to the inner surface of the back plate 65, that is, the surface on the storage chamber side by, for example, double-sided tape or hot melt.

Further, the first back vacuum heat insulating panel 78 has a back groove 781 on the back plate 65 side, as shown in FIG. For example, two back grooves 781 are provided on both left and right sides of the first back vacuum heat insulating panel 78, and are formed so as to extend in the vertical direction. The heat dissipation pipe 32 that constitutes a part of the refrigeration cycle is housed in the space formed between the back groove 781 and the back plate 65. That is, two vacuum heat insulation panels 78 and 79 are provided between the freezing cooler 21 and the heat radiation pipe 32. Therefore, the freezing cooler 21 is less likely to be affected by the heat radiation of the heat radiation pipe 32.

The second back vacuum heat insulation panel 79 is smaller than the first back vacuum heat insulation panel 78 and thinner than the first back vacuum heat insulation panel 78. The second back vacuum heat insulation panel 79 is adhered to the inner surface of the first back vacuum heat insulation panel 78 by, for example, a 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 made of the same material or different manufacturing methods.

The second back vacuum heat insulation panel 79 is provided so as to cover a rear part of the freezing temperature zone storage room, that is, the ice making room 13, a small freezing room (not shown), and the freezing room 14. In this case, the second back vacuum insulation panel 79 is formed in a size that covers the entire rear part of the freezing cooler 21 in the up-down direction and the left-right direction, as shown in FIG. 8. That is, the second back vacuum heat insulation panel 79 is located at the rear of the freezing cooler chamber 26 and covers the entire rear of the freezing cooler 21. It should be noted that the second back vacuum heat insulation panel 79 does not have to be arranged across the storage compartments in the freezing temperature zone, and may cover only a part of the rear side of the freezing compartment 14.

In the present embodiment, the refrigerating 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 to the one side, in this case, the left side in accordance with the refrigerating cooler 21. Thus, in the back heat insulating wall 48, the portion corresponding to the rear of the freezing cooler 21 has a double structure in which the two vacuum heat insulating panels 78 and 79 are provided. Therefore, in the back heat insulating wall 48, a portion corresponding to the rear of the freezing cooler 21, that is, a portion overlapping the freezing cooler 21 has higher heat insulating performance than other portions. Therefore, the refrigerating cooler 21 is less likely to be affected by heat from the rear.

As shown in FIGS. 4 and 9, a thin plate 80 is provided on the inside of the second back vacuum heat insulating panel 79, that is, on the surface on the inner box 50 side. The thin plate 80 prevents the second back vacuum heat insulation panel 79 from directly contacting the inner box 50, and thus functions as a protection member for preventing the second back vacuum heat insulation panel 79 from being damaged. That is, the thin plate 80 is provided on the surface of the second back vacuum heat insulating panel 79 on the side where the urethane foam 43 flows. The thin plate 80 is, for example, a foamed polyethylene and is a plate material that can be slightly deformed by an external load. The thin plate 80 can absorb the shock to some extent by deforming when the shock is applied from the outside, for example. The thin plate 80 is adhered to the second back vacuum heat insulating panel 79 by, for example, double-sided tape. The thin plate 80 has a size similar to that of 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 to the inner box 50 side instead of being bonded to the second back vacuum heat insulating panel 79.

The back heat insulating wall 48 has a double structure of the back vacuum heat insulating panels 78 and 79, whereby the distance between the second back vacuum heat insulating panel 79 and the inner box 50 is shortened. Then, the second back vacuum heat insulation panel 79 and the inner box 50 may 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, it is possible to prevent the second back vacuum heat insulation panel 79 from coming into contact with and damaging the inner box 50.

In the refrigerator 10 according to the above-described embodiment, the heat insulating box 40 is located below the bottom heat insulating wall 47 on both sides of the bottom heat insulating wall 47 forming the bottom of the storage chamber and on the opening 401 side of the bottom heat insulating wall 47. It has a leg member 68 provided so as to project to the side opposite to 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 insulation wall 47 is provided on the bottom plate 64 side between the inner box 50 that forms the inside of the heat insulation box 40, the bottom plate 64 that forms 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, and 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. The second bottom vacuum heat insulation panel 77 is provided. The bottom plate 64 is attached downward to the mounting portion to which the leg support member 67 is attached, that is, the screw hole 649, so as to avoid the screw hole 649 toward the center of the bottom heat insulating wall 47 and at least partially overlap in the thickness direction of the leg support member 67. And a recess 644 that is formed to project to accommodate the first bottom vacuum heat insulation panel 76. Then, the second bottom vacuum heat insulation panel 77 is formed so as to avoid the screw hole 649, in this case, to avoid the center side of the bottom heat insulation wall 47.

Here, a screw 69 for attaching the leg support member 67 projects from the attachment portion, ie, the screw hole 649, to which the leg support member 67 is attached. In this case, if the vacuum heat insulating panel and the screw 69 contact each other, the vacuum heat insulating panel may be damaged. Therefore, the vacuum heat insulating panel provided in the bottom heat insulating wall 47 needs to have a shape avoiding the mounting portion 649 in order to avoid interference with the mounting portion 649. In this case, if the vacuum heat insulating panel is configured to escape above the mounting portion 649, the thickness of the bottom heat insulating wall 47 increases, and the internal volume of the refrigerator 10 is compressed. On the other hand, if the vacuum heat insulating panel is configured to escape inside the mounting portion 649, that is, toward the center of the bottom heat insulating wall 47, the vacuum heat insulating panel becomes small, and as a result, the heat insulating performance is deteriorated.

Therefore, in the present embodiment, the bottom plate 64 is provided with a recess 644. The recess 644 is formed so as to avoid the screw hole 649 toward the center of the bottom heat insulating wall 47 and project downward so that at least a part of the leg support member 67 overlaps in the thickness direction. Then, the first bottom vacuum heat insulation panel 76 is housed in this recess 644, and 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. The storage chamber side of the vacuum heat insulation panel 76 is covered.

According to this, the first bottom vacuum heat insulation panel 76 and the second bottom vacuum heat 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, since 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, heat insulation is performed as compared with the case where it is configured by one vacuum heat insulating panel. Performance can be improved. Further, the recess 644 for accommodating the first bottom vacuum heat insulation panel 76 is formed so as to project downward so that at least a part of the leg support member 67 overlaps in the thickness direction. Therefore, even if the two vacuum heat insulating panels 76 and 77 are provided on the bottom heat insulating wall 47, the thickness of the bottom heat insulating wall 47 can be suppressed, and as a result, compression of the internal volume can be suppressed. As a result, in the refrigerator 10, the heat insulation performance is improved while maintaining the internal volume of the refrigerator and ensuring the safety of the vacuum heat insulation panels 76 and 77 provided in the bottom heat insulation wall 47, and thus the power consumption can be reduced. it can.

In the recess 644, the outer peripheral portion of the first bottom vacuum heat insulating panel 76 is filled with the foam heat insulating material 43. According to this, the outer peripheral portion of the first bottom vacuum heat insulating panel 76 is filled with the heat insulating foam heat insulating material 43. 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 higher. According to this, the heat insulating performance as the whole bottom heat insulating wall 47 can be made higher.

The bottom plate 64 is formed with a hole 647 that connects the inside and the outside of the bottom heat insulating wall 47. According to this, the gas generated when the liquid urethane foam 43 injected into the bottom heat insulating wall 47 foams and solidifies can be discharged to the outside through the hole 647. As a result, it is possible to prevent the internal pressure inside the bottom heat insulating wall 47 from increasing due to this gas, and the bottom heat insulating wall 47 from being deformed.

The hole 647 is provided in the recess 644 on the side opposite to the opening 401, where the first bottom vacuum heat insulating panel 76 is not provided, that is, in the rear gap 648. Thereby, when the heat insulation box body 40 is filled with the urethane foam 43, the heat insulation box body 40 is arranged with the opening portion 401 on the lower side, so that the hole 647 can be positioned on the upper side. In this case, the liquid urethane foam 43 injected into the heat insulating box body 40 collects 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 urethane foam 43 until the final stage of injecting the urethane foam 43. As a result, the gas generated when the urethane foam 43 is filled can be efficiently discharged.

The refrigerator 10 includes a refrigerating compartment 11 and a vegetable compartment 12 as storage compartments in the refrigerating temperature zone, and an ice making compartment 13, a small freezing compartment (not shown), and a freezing compartment 14 as storage compartments in the freezing temperature zone. In this case, since the storage compartment in the refrigerating temperature zone and the storage compartment in the refrigerating temperature zone have different temperature zones, the heat insulation performance required for the portion of the back heat insulating wall 48 corresponding to the storage compartment also differs. That is, in the back heat insulating wall 48, higher heat insulating performance is required in the portions forming the freezing temperature zone storage chambers 13, 14 than in the portions forming the refrigerating temperature zone storage chambers 11, 12. In this case, if the heat insulating performance of the back heat insulating wall 48 is adapted to the heat insulating performance required for the refrigerating temperature zone storage chambers 11, 12, the heat insulating performance required for the freezing temperature zone storage chambers 13, 14 will be 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 in the storage compartments 13 and 14 in the freezing temperature zone, it becomes excessive, which leads to an increase in cost.

Therefore, in the heat insulating box 40 of the refrigerator 10 of the present embodiment, the back heat insulating wall 48 includes the storage room in the refrigerating temperature range (in this case, the refrigerating room 11 and the vegetable room 12) and the storage room in the freezing temperature range (in this case). , The ice making chamber 13, a small freezing chamber (not shown), and the freezing chamber 14), and a first back vacuum heat insulation panel 78 that covers both of them, and a freezing temperature zone storage chamber (in this case, the ice making chamber 13, a small freezing chamber not shown). , And a second back vacuum insulation panel 79 that covers at least a portion of the freezer compartment 14). According to this, in the back heat insulating wall 48, the portion corresponding to the storage chambers 13 and 14 in the freezing temperature zone where higher heat insulating performance is required is made to have the double structure of the vacuum heat insulating panels 78 and 79 to enhance the heat insulating performance. ing. On the other hand, in the back heat insulation wall 48, the portion corresponding to the storage chambers 11 and 12 in the refrigerating temperature zone where high heat insulation performance is not required is configured by one vacuum heat insulation panel 78. As a result, the back heat insulating wall 48 can have a heat insulating performance suitable for each temperature zone, and as a result, the heat insulating performance of the heat insulating box 40 as a whole is improved to reduce the power consumption while increasing the cost. 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 higher. According to this, the back heat insulating wall 48 can be made to have higher heat insulating performance as a whole.

The second back vacuum heat insulation panel 79 covers the side opposite to the opening 401 of the freezing cooler 21, that is, the rear side. According to this, in the back heat insulating wall 48, a double structure in which two vacuum heat insulating panels 78 and 79 are provided behind the refrigerating cooler 21 that is cooled to a lower temperature and requires high heat insulating performance. , The insulation performance can be higher than other parts. As described above, the back heat insulating wall 48 locally increases the heat insulating performance of the portion where high heat insulating performance is required. As a result, it is possible to suppress the increase in cost while improving the heat insulating performance of the heat insulating box 40 as a whole and reducing the power consumption.

A thin plate 80 is provided on the inner box 50 side of the second back vacuum 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 is possible to prevent the second back vacuum insulation panel 79 from coming into contact with the inner box 50 and being damaged.

In addition, the heat insulating box 40 of the refrigerator 10 has a left side heat insulating wall 44 and a right side heat insulating wall 45 that form left and right side wall parts with respect to the opening 401. The left side heat insulation wall 44 is smaller than the first left side vacuum heat insulation panel 71 that covers the left side of the storage chamber and the second left side vacuum that is smaller than the first left side vacuum heat insulation panel 71 and covers the left side of the refrigerating cooler 21. And a heat insulation panel 72. The right side heat insulation wall 45 is smaller than the first right side vacuum heat insulation panel 73 that covers the right side of the storage chamber and the second right side vacuum that is smaller than the first right side vacuum heat insulation panel 73 and covers the right side of the refrigerating cooler 21. And a heat insulating panel 74.

According to this, in the left side heat insulation wall 44, a double structure in which two vacuum heat insulation panels 71 and 72 are provided on the left side of the refrigerating cooler 21 that is cooled to a lower temperature and requires high heat insulation performance. Thus, the heat insulation performance can be made higher than other parts. Similarly, in the right side heat insulating wall 45, the right side of the refrigerating cooler 21, which is cooled to a lower temperature and requires high heat insulating performance, has a double structure in which two vacuum heat insulating panels 73 and 74 are provided. , The insulation performance can be higher than other parts. In this way, the left side heat insulating wall 44 and the right side heat insulating wall 45 locally increase the heat insulating performance of the portion where high heat insulating performance is required. It is possible to suppress the increase in cost while improving the heat insulating performance of the heat insulating box 40 as a whole to reduce the 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 higher. Similarly, the first right side vacuum heat insulation panel 73 is set thicker than the second right side vacuum heat insulation panel 74, that is, the heat insulation performance is set higher. According to this, the left side heat insulation wall 44 and the right side heat insulation wall 45 can be made to have higher heat insulation 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-shaped vacuum heat insulation panel. Here, in order to improve the bendability of the second bottom vacuum heat insulation panel 77 during manufacturing, it is conceivable to form the second bottom vacuum heat insulation panel 77 thin. 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 arranged at a position avoiding the bent portion 774. Thereby, even if the second bottom vacuum heat insulation panel 77 is improved in bending performance at the expense of heat insulation performance, it is possible to secure sufficient heat insulation performance for the bottom heat insulation wall 47.

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

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

The refrigerator 10 of the above embodiment includes two coolers, a refrigerating cooler 20 for cooling the refrigerating temperature zone storage chamber and a freezing cooler 21 for cooling the refrigerating temperature zone storage chamber. However, the configuration is not limited to this. For example, it is possible to use a single cooler to cool the refrigerating temperature zone storage room and the freezing temperature zone storage room.
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 to this. For example, a plurality of plates may be integrally formed by bending one plate.
For each heat insulating wall, the double structure having two vacuum heat insulating panels has been described as an example, but the number of vacuum heat insulating panels is not limited to two, and three or more vacuum heat insulating panels are stacked and provided. You may comprise a heat insulation wall.

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 spirit of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

In the drawings, 10 is a refrigerator, 11 is a refrigerating room (storage room), 12 is a vegetable room (storage room), 13 is an ice making room (storage room), 14 is a freezing room (storage room), and 20 is a refrigerating cooler ( Cooler), 21 is a refrigerating cooler (cooler), 40 is a heat insulating box, 401 is an opening, 43 is urethane foam (foam heat insulating material), 44 is a left heat insulating wall (side heat insulating wall), 45 Is a right side heat insulating wall (side heat insulating wall), 47 is a bottom heat insulating wall, 48 is a back heat insulating wall, 50 is an inner box, 64 is a bottom plate, 644 is a recess, 647 is a hole, 649 is a screw hole (mounting portion), 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 a first right side vacuum heat insulating panel (first side vacuum heat insulating panel), 74 is a second right side vacuum heat insulating panel (second side vacuum heat insulating panel), 76 is a first bottom vacuum heat insulating panel, and 77 is a second The bottom vacuum heat insulating panel, 774 is a bent portion, 78 is a first back vacuum heat insulating panel, 79 is a second back vacuum heat insulating panel, and 80 is a thin plate (protective member).

Claims (6)

A refrigerating temperature zone storage chamber and a freezing temperature zone storage chamber, and an insulating box body having an opening communicating the inside and outside of the storage chamber,
The heat insulation box is
An inner box that constitutes the inside of the heat-insulating box,
An outer box that constitutes the outside of the heat insulating box,
A vacuum heat insulating panel provided between the inner box and the outer box,
On the inner box side of the vacuum heat insulation panel, a protective member that prevents the vacuum heat insulation panel from directly contacting the inner box and is deformable by an external load is provided.
refrigerator. The vacuum insulation panel covers at least a part of the storage compartment in the freezing temperature zone,
The refrigerator according to claim 1. The heat-insulating box has a back heat-insulating wall forming a wall opposite to the opening,
The vacuum heat insulation panel is provided on the back heat insulation wall,
The refrigerator according to claim 2. The heat insulation box body further has another vacuum heat insulation panel that covers both the storage room in the refrigerating temperature zone and the storage room in the freezing temperature zone,
The another vacuum insulation panel has higher insulation performance than the vacuum insulation panel,
The refrigerator according to any one of claims 1 to 3. A cooler for cooling the storage compartment in the freezing temperature zone,
The vacuum insulation panel covers the cooler on a side of the storage chamber opposite to the opening.
The refrigerator according to any one of claims 2 to 4. The heat insulation box is
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-shaped vacuum heat insulation panel,
The first vacuum heat insulation panel is arranged at a position avoiding the bent portion,
The refrigerator according to claim 1.

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