JP2022136422A - Heat insulating box body and refrigerator - Google Patents

Abstract

To provide a heat insulating box body and a refrigerator capable of improving fluidity of a foamed heat insulating material in a bottom surface part of the heat insulating box body.SOLUTION: A refrigerator 1 comprises a heat insulating box body 50. The heat insulating box body 50 has an inner box 70 and an outer box 60. The inside of the heat insulating box body 50 is filled with a foam heat insulating material 56. A vacuum heat insulating material 51 is arranged on a bottom plate 62 inside the heat insulating box body 50. The vacuum heat insulating material 51 has a cutout shape in which the right and left end parts of an edge located on the side of a frontage part 50e of the bottom plate 62 are notched at the corners.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a heat insulating box body provided in a refrigerator or the like, and a refrigerator provided with this heat insulating box body.

Refrigerators are provided with a heat insulating box so as to cover the outer periphery of the storage space in order to insulate the surroundings. The heat insulating box is composed of an outer box, an inner box, and a heat insulating material filled between them. As the heat insulating material, for example, a foam heat insulating material such as a rigid urethane foam heat insulating material is used.

In recent years, for the purpose of further improving the heat insulating performance, it has been proposed to dispose a vacuum heat insulating material inside the heat insulating box (see, for example, Patent Document 1). By using the vacuum heat insulating material, the heat insulating performance is improved and the thickness of the heat insulating box can be reduced.

JP 2008-101838 A

However, as the thickness of the heat insulating box becomes thinner, the space in which the foam heat insulating material flows becomes narrower inside the heat insulating box, making it difficult for the foam heat insulating material to flow. (voids) may occur.

In general, the foam insulation material is injected from an injection port provided on the back surface of the insulation box. The foamed heat insulating material injected into the heat insulating box first flows into the side portion of the heat insulating box, and then spreads to the bottom portion and the like while undergoing a chemical reaction, whereupon it fills and hardens. Therefore, the viscosity of the insulating foam material when it flows into the bottom surface of the insulating box tends to be higher than the viscosity at the time of injection. may decline.

Accordingly, an object of the present invention is to provide a heat insulating box and a refrigerator capable of improving the fluidity of the foam heat insulating material in the bottom portion of the heat insulating box.

A heat insulating box according to one aspect of the present invention is a heat insulating box having an inner box and an outer box, wherein a foam insulating material filled in the heat insulating box and a bottom plate of the outer box with vacuum insulation placed in the The vacuum heat insulating material has a cutout shape in which corner portions are cut out at both left and right ends of the edge located on the frontage side of the bottom plate.

Another aspect of the present invention relates to a refrigerator provided with the heat insulating box according to one aspect of the present invention.

ADVANTAGE OF THE INVENTION According to one aspect of this invention, the heat insulation box and refrigerator which can improve the fluidity|liquidity of the foam insulation material in the bottom face part of a heat insulation box can be provided.

It is a top view which shows the structure of the front part of the refrigerator concerning one Embodiment of this invention. It is a cross-sectional schematic diagram which shows the internal structure of the refrigerator shown in FIG. FIG. 2 is a cross-sectional view showing the internal configuration of the bottom portion of the heat insulating box that constitutes the refrigerator shown in FIG. 1 ; It is a top view which shows the structure of the bottom face part of the heat insulation box which comprises the refrigerator shown in FIG. FIG. 4 is a perspective view showing the configuration of a bottom plate forming the bottom portion of the heat insulating box shown in FIG. 3 ; 6 is a perspective view showing a state in which a vacuum heat insulating material is arranged on the bottom plate shown in FIG. 5; FIG. FIG. 2 is a schematic diagram showing how a heat insulating material is injected into the heat insulating box body of the refrigerator shown in FIG. 1; FIG. 4 is a schematic diagram showing how a heat insulating material flows in the bottom portion of the heat insulating box body of the refrigerator according to the first embodiment; 7 is a schematic diagram for explaining the dimensions and shape of the vacuum heat insulating material shown in FIG. 6. FIG. It is a perspective view which shows the structure of the baseplate which forms the bottom part of the heat insulation box which comprises the refrigerator concerning 2nd Embodiment.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First embodiment>
(Overall configuration of refrigerator)
First, the overall configuration of the refrigerator 1 according to the first embodiment will be described. FIG. 1 shows an appearance of the refrigerator 1 viewed from the front. 2 shows the internal configuration of the refrigerator 1. As shown in FIG.

The outer shape of the refrigerator 1 is mainly composed of a heat insulating box body 50. - 特許庁A storage space of the refrigerator 1 is formed by the heat insulating box body 50 . The storage space formed by the heat insulating box body 50 is divided by a plurality of partitions 58 extending in the horizontal direction into, for example, the refrigerator compartment 11, the vegetable compartment 12, the ice making compartment 14 and the second freezing compartment 15, in order from the top. It is divided into a freezer compartment 13.

The refrigerating chamber 11 is provided with left and right divided double doors 11a and 11b. The vegetable compartment 12 is provided with a drawer-type vegetable compartment door 12a. The freezer compartment 13 is provided with a drawer-type freezer compartment door 13a. The ice making chamber 14 is provided with a drawer-type ice making chamber door 14a. The second freezer compartment 15 is provided with a drawer-type freezer compartment door 15a.

As described above, the refrigerator 1 according to the present embodiment is divided into a plurality of storage spaces and provided with the refrigerator compartment 11, the vegetable compartment 12, and the like. However, the arrangement position of each storage space is not limited to this. Also, the structure of the door provided in each storage space is not limited to the one described above.

In this embodiment, the side on which the door is provided is called the front side or the front side of the refrigerator. Based on the position where the refrigerator 1 is installed in a normal state with the front surface as a reference, each surface of the refrigerator 1 is defined as the top surface, the side surface, the back surface, and the bottom surface. Further, the up-down direction of the refrigerator 1 when the refrigerator 1 is placed on the installation surface is referred to as the up-down direction of the refrigerator 1 (or the insulating box body 50 or the like). In addition, when the refrigerator 1 is placed on the installation surface, the front-rear direction as viewed from the front of the refrigerator 1 is referred to as the front-rear direction of the refrigerator 1 (or the insulating box body 50 or the like). Also, the left side of the refrigerator 1 when viewed from the front side is called the left side of the refrigerator 1 , and the right side of the refrigerator 1 when viewed from the front side is called the right side of the refrigerator 1 .

A refrigerating cycle is provided inside the refrigerator 1 . The refrigeration cycle is configured by connecting a compressor 31, a condenser (not shown), an expander (not shown), and a cooler 32 via refrigerant pipes (refrigerant flow paths) through which refrigerant flows. ing.

Further, inside the refrigerator 1, a control unit (not shown) is provided. This controller controls the operation of the refrigeration cycle. That is, when the control unit drives the compressor 31, the operation of the refrigeration cycle is started, and the refrigerant flows through the cycle. As shown in FIG. 2 , the compressor 31 is arranged in a machine room 30 provided on the rear side of the bottom of the refrigerator 1 .

Cooler 32 is arranged in cooling chamber 35 provided on the back side of refrigerator 1 . A cooling fan 33 and the like are provided in the cooling chamber 35 in addition to the cooler 32 . A cooling fan 33 is provided to circulate air between the cooling chamber 35 and each storage space.

(Structure of heat insulating box)
The refrigerator 1 is provided with a heat insulating box 50 as a heat insulating structure for insulating each storage space from the surroundings. The heat insulation box 50 is provided so as to cover the outer periphery of the refrigerator 1 . As shown in FIG. 2 , the heat insulating box body 50 mainly includes an outer box 60 , an inner box 70 , a vacuum heat insulating material 51 and a foam heat insulating material 56 .

The outer box 60 forms the outer peripheral surface of the heat insulation box 50 . The inner box 70 forms the inner peripheral surface of the heat insulating box 50 . In this embodiment, the names of the parts of the heat insulating box 50 are the top part 50a, the side part 50b, the back part 50c, the bottom part 50d, and the front part 50e in accordance with the names of the sides of the refrigerator 1.

A space for arranging the machine room 30 is formed on the rear side of the bottom portion 50d of the heat insulating box 50 . The machine room 30 is arranged outside the heat insulation box 50 . This is because the temperature in the machine room 30 rises due to the operation of the compressor 31 . The machine room 30 is mainly partitioned by a bottom plate 62 (also called a bottom plate) of the outer casing 60 that forms the bottom portion 50d.

Thus, the machine room 30 and the freezer compartment 13 are separated by the heat insulating box body 50 . Therefore, heat generated in the machine room 30 can be prevented from flowing into the freezer compartment 13 .

The vacuum heat insulating material 51 and foam heat insulating material 56 are provided in the space between the outer box 60 and the inner box 70 . The vacuum heat insulating material 51 is also called VIP, and is a thin sheet-like or plate-like heat insulating material. The vacuum heat insulating materials 51 are arranged, for example, on the side surface, top surface, bottom surface, rear surface, and the like of the refrigerator 1 . As shown in FIG. 2 , the vacuum heat insulating material 51 is arranged inside the heat insulating box 50 on the side of the outer box 60 .

The foamed heat insulating material 56 can be formed of, for example, foamed polyurethane (also referred to as rigid urethane foam). The interior of the partitioning portion 58 that partitions each storage space (for example, the partitioning portion 58 between the vegetable compartment 12 and the ice making compartment 14 and the second freezing compartment 15) may also be filled with the foam heat insulating material 56. .

The foamed heat insulating material 56 is formed by injecting a liquid foamed urethane material (also called a foamed heat insulating material or heat insulating material) into the heat insulating box 50 and foaming the material inside the heat insulating box 50 . filled in. The rear surface portion 50c of the heat insulating box 50 is provided with an injection port 59 for injecting the heat insulating material (see FIG. 7). In this embodiment, two injection ports 59 are provided near the left end of the back portion 50c, and two injection ports 59 are provided near the right end of the back portion 50c, for a total of four injection ports. An inlet 59 is provided. However, the number of injection ports 59 is not limited to this.

The vacuum heat insulating material 51 is formed by covering a core material having fine voids, such as glass wool or silica powder, with a jacket material (bag-like body, for example, laminate film) having gas barrier properties, and sealing the inside of the jacket material under reduced pressure. be done. A vacuum heat insulating material can realize a high heat insulating effect by keeping its internal space at a high vacuum and minimizing the amount of heat transmitted through the gas phase. A conventionally known material can be used for the material constituting the vacuum heat insulating material 51 .

(Structure of the bottom part of the heat insulating box)
Next, the configuration of the bottom surface portion 50d of the heat insulating box 50 will be described. FIG. 3 shows the configuration of a longitudinal section of the bottom portion 50d of the heat insulating box 50. As shown in FIG. FIG. 4 shows the structure of the bottom portion of the outer box 60 that constitutes the heat insulating box 50. As shown in FIG. FIG. 4 is a plan view of the inside of the outer case 60 viewed from above. 5 shows the appearance of the bottom plate 62 that forms the bottom portion 50d of the heat insulating box 50. As shown in FIG. FIG. 6 shows a state in which the vacuum heat insulating material 51 and the polystyrene foam (flow restricting member) 41 are arranged on the bottom plate 62 .

The bottom portion 50 d of the heat insulating box 50 is mainly composed of the bottom plate 62 of the outer box 60 , the bottom portion 72 of the inner box 70 , the foam heat insulating material 56 and the vacuum heat insulating material 51 .

The bottom plate 62 forms the bottom surface of the heat insulation box 50 . The bottom plate 62 also forms part of the wall of the machine room 30 . The bottom plate 62 has a front bottom portion 64, a rising portion 65, a rear portion 66, and the like.

The front bottom surface portion 64 is located on the front side of the bottom plate 62 and forms the bottom surface of the heat insulating box 50 . The front bottom surface portion 64 has a concave portion 64a, a peripheral edge portion 68, an inclined portion 64b, and the like.

The recess 64 a forms most of the area of the front bottom surface 64 . The recessed portion 64a is formed with a surface located below the surface of the peripheral edge portion 68 provided on the outer periphery thereof. The recessed portion 64 a has a recessed shape that matches the shape of the vacuum heat insulating material 51 arranged on the bottom plate 62 .

The peripheral edge portion 68 is provided on the front and side peripheral portions of the recess 64a. The peripheral edge 68 has a left corner 68a and a right corner 68b. The left corner portion 68a and the right corner portion 68b are flat surface portions having a substantially triangular shape when viewed from above.

The front legs of the refrigerator 1 are arranged below the left corner 68a and the right corner 68b. If the vacuum heat insulating material is arranged at the left corner 68a and the right corner 68b of the bottom plate 62, the vacuum heat insulating material is deformed or destroyed by the load applied to the front legs when the front legs are attached or when the refrigerator 1 is installed. It may let you. As in the present embodiment, by providing notch portions 53a and 53b on the edge of the frontage portion 50e of the vacuum heat insulating material 51 and providing the left corner portion 68a and the right corner portion 68b where the vacuum heat insulating material 51 is not arranged, Without arranging the vacuum heat insulating material 51 at the attachment position of the front leg, the vacuum heat insulating material 51 can be arranged even at positions closer to the left and right edges of the bottom plate 62 .

The inclined portion 64b is provided between the recessed portion 64a and the peripheral edge portion 68. As shown in FIG. The inclined portion 64b is inclined along the height difference between the surface of the recessed portion 64a and the surface of the peripheral edge portion 68. As shown in FIG. By providing such an inclined portion 64b, a groove can be formed between the region of the bottom plate 62 where the vacuum heat insulating material 51 is arranged and the peripheral region where the vacuum heat insulating material is not arranged. The insulating foam material that has flowed into the bottom surface portion 50 d flows into this groove, so that the insulating foam material can flow along the edges of the vacuum insulating material 51 . In addition, the sloped portion 64b can smoothen the difference in level with the peripheral region. Therefore, the foam heat insulating material that has flowed into the bottom surface portion 50d can smoothly flow into the groove.

The rising portion 65 has a shape that slopes upward from the central portion of the heat insulating box 50 in the front-rear direction toward the rear. The machine room 30 is positioned behind the rising portion 65 . As shown in FIG. 3 and the like, the rear portion of the vacuum heat insulating material 51 arranged on the bottom plate 62 is bent and arranged so as to be leaned against the rising portion 65 .

The rear portion 66 is located on the rear side of the bottom plate 62 and forms the upper surface of the machine room 30 .

The bottom surface portion 72 of the inner box 70 has a shape generally following the shape of the bottom plate 62 of the outer box 60 . In the space between the bottom plate 62 of the outer box 60 and the bottom surface portion 72 of the inner box 70, a heat insulating layer including foam heat insulating material 56 and vacuum heat insulating material 51 is formed.

The vacuum heat insulating material 51 arranged on the bottom plate 62 has a substantially rectangular flat plate shape. However, cutouts (cutout shapes) 53a and 53b are provided at the left and right ends of the front portion of the vacuum heat insulating material 51, which are obtained by obliquely cutting out corners of a rectangle. As will be described later, the heat insulating material injected into the heat insulating box 50 from the injection port 59 flows into the bottom surface portion 50d of the heat insulating box 50 from the front portion 50e side. By providing such notches 53a and 53b, it is possible to facilitate the flow of the foam insulating material that has flowed into the frontage 50e of the bottom surface 50d along the edges of the notches 53a and 53b. can. As a result, the amount of foamed heat insulating material flowing over the vacuum heat insulating material 51 can be reduced.

The edges of the vacuum heat insulating material 51 arranged on the bottom plate 62 are hereinafter referred to as a front edge 51a and side edges 51b and 51b, based on the arrangement positions in the refrigerator 1. As shown in FIG. The notch 53a is positioned between the left side edge 51b and the front edge 51a. The notch 53b is positioned between the right side edge 51b and the front edge 51a.

The opening 50e side of the concave portion 64a of the bottom plate 62 has a shape in which both left and right corners on the front side are removed in conformity with the shape of the notch portions 53a and 53b of the vacuum heat insulating material 51 . The inclined portions 64b provided adjacent to the front edge and the side edge of the recess 64a are also provided so as to match the shape of the notches 53a and 53b of the vacuum heat insulating material 51. As shown in FIG.

The foam heat insulating material that has flowed into the frontage 50e of the bottom surface 50d flows along the edges of the cutouts 53a and 53b and splits toward the front edge 51a and the side edges 51b. The foam insulation material that has flowed along the side edges 51b flows upward along the side edges 51b because the flow toward the vacuum insulation materials 51 is restricted by the side edges 51b of the vacuum insulation materials 51. easier to do. On the other hand, the foam insulation material that has flowed to the front edge 51a side mainly flows in the left-right direction because the front edge 51a of the vacuum insulation material 51 restricts the flow toward the vacuum insulation material 51, that is, upward. However, since the foamed heat insulating material flows from the other end side in the left-right direction, the flow resistance increases. Thereby, the foam heat insulating material can be guided along the side edges 51 b of the vacuum heat insulating material 51 .

The vacuum heat insulating material 51 preferably protrudes upward from the peripheral edge portion 68 of the bottom plate 62 . This can be achieved, for example, by making the thickness of the vacuum heat insulating material 51 larger than the depth of the recess 64a. As a result, the foamed heat insulating material flowing along the front edge 51a side, the side edges 51b, and the cutouts 53a and 53b of the vacuum heat insulating material 51 can be prevented from riding up on the vacuum heat insulating material 51. , the foam heat insulating material can be more effectively guided along the side edges 51 b of the vacuum heat insulating material 51 .

The notches 53a and 53b formed in the vacuum heat insulating material 51 can be formed, for example, as follows.

First, glass wool or the like, which is the core material of the vacuum insulation material, is formed into a predetermined shape having a notch. The notch can be formed, for example, by cutting corners of a rectangular or square sheet-like core material.

The core material molded into a predetermined shape as described above is placed in a bag-shaped outer covering material. Then, the corner portions of the covering material corresponding to the cut corner portions of the core material are bent inward. As a result, a vacuum heat insulating material 51 having notches 53a and 53b is obtained.

Further, among the inclined portions 64b provided on the outer periphery of the recessed portion 64a, the width of the inclined portion 64b facing the side edge 51b of the vacuum heat insulating material 51 is wider than the width of the inclined portion 64b facing the front edge 51a. Larger is preferred. That is, it is preferable that the width of the inclined portion 64b located on the frontage portion 50e side is narrower.

The foam heat insulating material that has flowed into the frontage 50e of the bottom surface 50d is split along the edges of the cutouts 53a and 53b toward the front edge 51a and the side edges 51b. As described above, by narrowing the width of the inclined portion 64b facing the front edge 51a, the amount of liquid flowing toward the front edge 51a can be reduced. Therefore, it is possible to obtain the same effect as when the polystyrene foam 41, which will be described later, is provided.

Further, as shown in FIG. 6 , a polystyrene foam 41 may be arranged on the side of the frontage 50 e of the bottom plate 62 to block the flow of the heat insulating foam material injected into the heat insulating box 50 . The polystyrene foam 41 is arranged on the front side of the front edge 51 a of the vacuum heat insulating material 51 and substantially in the center of the bottom plate 62 in the left-right direction. The polystyrene foam 41 has, for example, a rectangular parallelepiped shape, a prismatic shape, or the like. Thereby, the flow of the heat insulating material flowing into the frontage portion 50e of the bottom portion 50d can be blocked.

By providing such expanded polystyrene 41, the foamed heat insulating material that first flows into the side surface portion 50b of the heat insulating box body 50 and then flows into the bottom surface portion 50d from the frontage portion 50e side is distributed to the left and right sides of the frontage portion 50e. It can be made difficult to flow into the central part of the direction. Then, the foam heat insulating material that has flowed into the bottom surface portion 50d from the frontage portion 50e side can be made to flow more easily from the side end portions of the bottom plate 62 to the rear side of the bottom surface portion 50d.

(Manufacturing method of heat insulating box)
Next, a method for manufacturing the heat insulating box 50 will be described. FIG. 7 shows how the heat insulating material is injected into the heat insulating box 50 . In FIG. 7, arrows indicate the flow of the heat insulating material injected from each injection port 59 provided in the back surface portion 50c of the heat insulating box 50. As shown in FIG. In FIG. 8, arrows indicate the flow of the heat insulating material that has flowed into the bottom portion 50d of the heat insulating box 50. As shown in FIG.

First, members such as the vacuum heat insulating material 51 and the heat radiation pipe (not shown) are attached to predetermined positions on the inner surface of each surface portion of the outer casing 60 . In addition, parts such as an internal electrical unit and various wirings are attached to predetermined positions of the inner box 70 .

Next, each surface of the outer box 60 is attached so as to cover the outer circumference of the inner box 70 . Thereby, the outer shape of the heat insulation box 50 is formed.

After that, with the back portion 50c of the heat insulating box 50 facing upward, a liquid heat insulating foam material (urethane foam material) is injected from an injection port 59 formed in the back portion 50c. At this time, an injection nozzle of a heat insulating material injection device is inserted into the injection port 59 . The foamed heat insulating material discharged from the injection nozzle into the heat insulating box body 50 foams in order from the front side (frontage 50e side) to the back side in the space between the outer box 60 and the inner box 70. It is filled while increasing the volume. The foamed insulation is then cured.

That is, when the heat insulating material is injected from each injection port 59 with the back portion 50c of the heat insulating box 50 facing upward, the heat insulating material passes through the side portion 50b inside the heat insulating box 50 by gravity and reaches the lowest position. It flows down toward the opening 50e (see FIG. 7).

In refrigerators of recent years, it is desired to make the walls of the heat insulating box body 50 thinner for the purpose of securing a larger internal space. For example, regarding the bottom portion of the heat insulating box, the conventional heat insulating box has a thickness of about 40 mm. It is being considered to make it about 30 mm.

In this embodiment, in the bottom surface portion 50d of the heat insulating box body 50, a gap G1 (see FIG. 3 ) is in the range of about 15 mm or more and about 25 mm or less. At the rising portion 65 of the bottom plate 62, the gap between the bottom surface portion 72 of the inner box 70 and the vacuum insulation material 51 becomes even narrower, and at the portion where the gap is the narrowest, the size of the gap G2 (see FIG. 3) is about 5 mm or more and about 15 mm or less.

Since the thickness of the wall portion of the heat insulating box 50 is reduced, the space in which the heat insulating material flows becomes narrower in the wall portion, making it difficult for the heat insulating material to flow. If the vacuum heat insulating material 51 is provided inside the heat insulating box 50, the flow space of the heat insulating material becomes narrower. As a result, in the process of foaming and filling the injected insulating material in the insulating box 50, voids (spaces) not filled with the foam insulating material are formed particularly downstream of the vacuum insulating material 51 in the filling direction of the insulating material. more likely to occur.

In the heat insulating box 50 according to the present embodiment, notch portions 53a and 53b are provided at both left and right end portions of the edge of the vacuum heat insulating material 51 located on the front portion 50e side. Further, a concave portion 64 a and an inclined portion 64 b matching the shape of the vacuum heat insulating material 51 are formed in the front bottom portion 64 of the bottom plate 62 of the heat insulating box 50 .

According to this configuration, the heat insulating material that has flowed into the bottom surface portion 50d from the frontage portion 50e side of the side surface portion 50b of the heat insulating box 50 is directed toward the left and right side ends of the bottom plate 62 where the vacuum heat insulating material 51 is not arranged. can be guided to (see FIG. 8). As a result, the amount of heat insulating material flowing into the narrow space between the vacuum heat insulating material 51 and the bottom surface portion 72 of the inner box 70 can be reduced, and the heat insulating material flowing into the bottom surface portion 50d of the heat insulating box body 50 can be reduced. Fillability in the body can be improved.

The size of the gap G3 (see FIG. 9) between the side edge 51b of the vacuum insulation material 51 and the side edge 62b of the bottom plate 62 is reduced by improving the filling property in the heat insulating box. be able to. For example, the size of the gap G3 can be set to approximately 50 mm or less. Also, more preferably, the size of the gap G3 can be set to about 40 mm or less. Thereby, the arrangement area of the vacuum heat insulating material 51 arranged on the bottom plate 62 can be increased. That is, the vacuum heat insulating material 51 can be arranged in a wider range of the bottom surface portion 50 d of the heat insulating box 50 .

In addition, in order to allow more of the heat insulating material that has flowed into the frontage 50e of the bottom surface 50d to flow toward the side edges 62b of the bottom plate 62, the notches 53a and 53b of the vacuum heat insulating material 51 are inclined at an angle A (Fig. 9) is preferably 45 degrees or more. Here, the inclination angle A is the angle of the notch shape with respect to the front edge 51 a of the vacuum heat insulating material 51 .

In this embodiment, the cutouts 53a and 53b of the vacuum heat insulating material 51 have a shape obtained by obliquely cutting off the corners of the substantially rectangular vacuum heat insulating material. is not limited to The cut-out portion of the vacuum heat insulating material 51 may have, for example, a shape obtained by cutting off a corner portion of a substantially rectangular vacuum heat insulating material into a square shape or a sector shape.

(Summary of the first embodiment)
As described above, the refrigerator 1 according to this embodiment includes the heat insulating box body 50 . The heat insulating box body 50 has an inner box 70 and an outer box 60 . The heat insulating box 50 is filled with foam heat insulating material 56 . A vacuum heat insulating material 51 is arranged on the side of the outer box 60 inside the heat insulating box 50 . At least one injection port 59 for injecting the foam insulation material is provided on the rear surface of the insulation box body 50 .

A bottom plate 62 is provided on the bottom portion 50 d of the heat insulating box 50 . A vacuum heat insulating material 51 is arranged on the bottom plate 62 . The vacuum heat insulating material 51 has a cutout shape in which corner portions are cut out at both left and right ends of the edge located on the side of the frontage 50e. That is, the vacuum heat insulating material 51 is provided with notches 53a and 53b.

According to the above configuration, the notch portions 53a and 53b are provided in the vacuum heat insulating material 51, so that the fluidity of the heat insulating material flowing from the side portion 50b of the heat insulating box 50 to the frontage portion 50e of the bottom portion 50d is reduced. can be suppressed from lowering due to the influence of the vacuum heat insulating material 51 .

Therefore, according to the heat insulating box 50 according to the present embodiment, it is possible to make the heat insulating foam material flow more easily inside the heat insulating box when the heat insulating foam material is injected. As a result, it is possible to reduce the possibility of occurrence of a portion not filled with the foamed heat insulating material in the interior of the heat insulating box 50 while realizing thinning of the side portion of the heat insulating box 50 .

Further, as in the present embodiment, by providing the notch portion 53a on the edge of the frontage portion 50e of the vacuum heat insulating material 51, the front corner portions of the bottom plate 62 (that is, the left corner portion 68a and the right corner portion) 68b) can be provided with a region where the vacuum insulation 51 is not arranged. As a result, the vacuum heat insulating material 51 is not placed at the attachment position of the adjustment leg attached to the front part of the bottom plate 62, and the vacuum heat insulating material 51 is placed even closer to the left and right edges of the bottom plate 62.例文帳に追加be able to.

With this configuration, the vacuum heat insulating material 51 can be arranged over the widest possible area of the bottom surface portion 50d of the heat insulating box 50 . Therefore, the heat insulating property of the bottom portion 50d of the heat insulating box 50 can be improved.

<Second embodiment>
Next, a second embodiment of the invention will be described. FIG. 10 shows the configuration of the bottom plate 62 of the heat insulating box body 50 provided in the refrigerator 1 according to the second embodiment. The points different from the first embodiment will be mainly described below.

In the refrigerator 1 according to this embodiment, the bottom surface portion 50d of the heat insulating box body 50 is mainly composed of the bottom plate 62 of the outer box 60, the bottom surface portion 72 of the inner box 70, the foam heat insulating material 56, and the vacuum heat insulating material 51. It is configured. A configuration similar to that of the first embodiment can be applied to each of these members.

10 shows a state in which the vacuum heat insulating material 51 is arranged on the bottom plate 62. As shown in FIG. As can be seen by comparing FIG. 10 and FIG. 6, in the configuration according to this embodiment, the foamed polystyrene 41 is not provided on the side of the frontage 50e of the bottom plate 62 . Other than that, the same configuration as in the first embodiment can be applied.

As described above, in the configuration according to one embodiment of the present invention, a flow restricting member such as polystyrene foam may not be provided.

<Third Embodiment>
Next, a third embodiment of the invention will be described. In the refrigerator 1 according to the embodiment, the bottom portion 50d of the heat insulating box body 50 is mainly composed of the bottom plate 62 of the outer box 60, the bottom portion 72 of the inner box 70, the foam heat insulating material 56, and the vacuum heat insulating material 51. It is The same configuration as in the first embodiment can be applied to each member other than the bottom plate 62 .

In the configuration according to this embodiment, the foamed polystyrene 41 is not provided on the side of the frontage 50e of the bottom plate 62 . Instead, in the present embodiment, a protrusion is provided at the center of the frontage 50e of the bottom plate 62 in the left-right direction to block the flow of the heat insulating material. This protrusion corresponds to a flow restricting member.

By providing such a protrusion, the foamed heat insulating material that first flows into the side surface portion 50b of the heat insulating box 50 and then flows into the bottom surface portion 50d from the frontage portion 50e side is distributed to the left and right sides of the frontage portion 50e. It can be made difficult to flow into the central part of the direction. Then, the foam heat insulating material that has flowed into the bottom surface portion 50d from the frontage portion 50e side can be made to flow more easily from the side end portions of the bottom plate 62 to the rear side of the bottom surface portion 50d.

(summary)
A heat insulating box (for example, heat insulating box 50) according to one aspect of the present invention has an inner box (for example, inner box 70) and an outer box (for example, outer box 60). This heat insulating box includes a foam heat insulating material (for example, foam heat insulating material 56) filled in the heat insulating box and a vacuum heat insulating material (for example, bottom plate 62) disposed on the bottom plate of the outer box (for example, , vacuum insulation 51). The vacuum heat insulating material has a notch shape (for example, notch 53a) obtained by notching corners at both left and right ends of the edge located on the frontage (for example, frontage 50e) side of the bottom plate. , a notch 53b).

In the heat insulating box (for example, the heat insulating box 50) according to one aspect of the present invention, the bottom plate (for example, the bottom plate 62) is recessed according to the shape of the vacuum heat insulating material (for example, the vacuum heat insulating material 51). A concave portion (for example, concave portion 64a) may be provided, and the vacuum heat insulating material may protrude upward from the peripheral edge portion (eg, peripheral edge portion 68) of the bottom plate surrounding the concave portion.

In the insulating box (e.g., insulating box 50) according to one aspect of the present invention described above, an inclined portion (e.g., inclined portion 64b) may be provided.

In the heat-insulating box (e.g., heat-insulating box 50) according to one aspect of the present invention, the frontage (e.g., frontage 50e) side of the bottom plate (e.g., bottom plate 62) peripheral edge (e.g., peripheral edge) 68) may be narrower than the width of the inclined portions provided on the left and right sides of the bottom plate (for example, the inclined portion 64b).

In the heat-insulating box (e.g., heat-insulating box 50) according to one aspect of the present invention, the frontage (e.g., frontage 50e) side of the bottom plate (e.g., bottom plate 62) peripheral edge (e.g., peripheral edge) 68) may be provided with a flow regulating member (for example, the foamed polystyrene 41, the protrusion of the bottom plate 62) that dams the flow of the material of the foamed heat insulating material (for example, the foamed heat insulating material 56).

In the heat insulating box (e.g., heat insulating box 50) according to one aspect of the present invention, the notch shape (e.g., notch portion 53a, notch portion) of the vacuum heat insulating material (e.g., vacuum heat insulating material 51) 53b) may have a notch angle (eg, inclination angle A) of 45 degrees or more with respect to the edge on the side of the frontage (eg, frontage 50e).

A refrigerator (for example, refrigerator 1) according to another aspect of the present invention includes the heat insulating box (for example, heat insulating box 50) according to any one of the aspects of the present invention.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims. Also, configurations obtained by combining configurations of different embodiments described herein are also included in the scope of the present invention.

1: Refrigerator 41: Styrofoam (flow restricting member)
50: Heat-insulating box 50d: Bottom portion 50e (of heat-insulating box): Frontage portion (of heat-insulating box) 51: Vacuum heat insulating material 53a: Notch portion (notch shape) (of vacuum heat insulating material)
53b: Notch portion (notch shape) (of vacuum insulation material)
56: Foamed heat insulating material 59: Filling port 60: Outer box 62: Bottom plate 64a (of outer box): Recessed portion 64b (of bottom plate): Inclined portion 70 (of bottom plate): Inner box A: Inclined angle

Claims (7)

A heat insulating box body having an inner box and an outer box,
a foamed heat insulating material filled in the heat insulating box;
A vacuum insulation material arranged on the bottom plate of the outer box,
The vacuum heat insulating material has a cutout shape in which corner portions are cut out at both left and right ends of the edge located on the frontage side of the bottom plate.
Insulated box. The bottom plate has a recess that is recessed according to the shape of the vacuum heat insulating material,
The vacuum heat insulating material protrudes upward from the peripheral edge portion of the bottom plate that surrounds the recess,
The heat insulating box according to claim 1. An inclined portion is provided between the peripheral portion of the bottom plate and the recess,
The heat insulating box according to claim 2. The width of the inclined portion provided on the peripheral portion of the bottom plate on the frontage portion side is narrower than the width of the inclined portion provided on the left and right sides of the bottom plate,
The heat insulating box according to claim 3. A flow regulating member is arranged on the peripheral edge of the bottom plate on the side of the frontage to block the flow of the material of the foamed heat insulating material.
The heat insulation box according to claim 1. The cutout shape of the vacuum heat insulating material has an angle of 45 degrees or more with respect to the edge on the frontage side,
The heat insulation box according to any one of claims 1 to 5. A refrigerator comprising the heat insulating box according to any one of claims 1 to 6.

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