TW202346772A - （無） - Google Patents

Abstract

The refrigerator is provided with a heat insulation box. The heat insulation box body comprises an inner box and an outer box. A vacuum heat-insulating material is disposed in the heat-insulating box. The heat insulation box body is filled with a foaming heat insulation piece. In the side surface part of the heat insulation box body, the thickness of the foaming heat insulation material opposite to the vacuum heat insulation material is larger than the thickness of the vacuum heat insulation material in the area which is smaller than the thickness of the vacuum heat insulation material. A supporting part is arranged on the side wall of the inner box, the supporting part is used for supporting a structural body arranged in the inner box, and the upper portion and the lower portion of the supporting part are wide parts enabling the thickness of the foaming heat insulation piece to be expanded.

Description

Insulated boxes and refrigerators

The present invention relates to a heat-insulating box provided in a refrigerator or the like, and a refrigerator equipped with the heat-insulating box.

In order to insulate heat from the surroundings, a heat-insulating box is provided in the refrigerator to cover the outer periphery of the storage space. The heat-insulating box is composed of an outer box, an inner box and a heat-insulating piece filled between them. As the heat insulating material, for example, a foam heat insulating material such as a rigid foamed polyurethane heat insulating material is used.

In recent years, in order to further improve the thermal insulation performance, the solution of arranging vacuum insulation parts in the thermal insulation box has been proposed.

For example, Japanese Unexamined Patent Publication No. 2006-183896 discloses a refrigerator in which a vacuum heat insulator and a foam heat insulator are provided in an heat insulating wall so that the volume of the vacuum heat insulating material occupies the entire volume of the heat insulating wall. ratio is above the specified value.

By using vacuum insulation, the insulation performance is improved and the thickness of the insulation box is made thinner. However, as the thickness of the heat insulating box becomes thinner, the space for the foamed heat insulating material to flow in the heat insulating box becomes narrower, making it difficult for the foamed heat insulating material to flow. Therefore, after the heat insulating material is foamed, it may occur. The voids of foam insulation are not filled.

Therefore, an object of the present invention is to provide a structure that can make it easier to fill the heat insulating box with the foamed heat insulating material when injecting the foamed heat insulating material into the heat insulating box.

One aspect of the present invention relates to a heat-insulating box having an inner box and an outer box. The heat insulating box has: a vacuum heat insulating piece, which is arranged in the heat insulating box; a foam heat insulating piece, which is filled in the inside of the heat insulating box; and at least one injection port, which is arranged in the heat insulating box. The material of the foamed heat insulation piece is injected into the back side of the heat insulation box. In the side portion of the heat insulating box, a region where the thickness of the foamed heat insulating material facing the vacuum heat insulating material is smaller than the thickness of the vacuum heat insulating material is greater than or equal to the thickness of the vacuum heat insulating material. There are more areas, and a support portion is provided on the side wall of the inner box. The support portion supports the structure arranged in the box. The upper and lower portions of the support portion serve as a base for expanding the foam insulation. The wide part of thickness.

According to the heat-insulating box according to one aspect of the present invention, when the foamed heat-insulating material is injected, the foamed heat-insulating material can be filled into the heat-insulating box more easily.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are assigned the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions about them will not be repeated.

<First Embodiment> (The overall composition of the refrigerator) First, the overall structure of the refrigerator 1 according to the first embodiment will be described. FIG. 1 shows the internal structure of the refrigerator 1.

As shown in FIG. 1 , the refrigerator 1 includes a refrigerator compartment 11 on an upper floor, a vegetable compartment 12 on a middle floor, a freezer compartment 13 on a lower floor, and the like. The refrigerating compartment door 11a is provided in the refrigerating compartment 11. The vegetable compartment 12 is provided with a vegetable compartment door 12a. The freezing chamber 13 is provided with a freezing chamber door 13a.

As mentioned above, the refrigerator 1 of this embodiment is divided into an upper part, a middle part, and a lower part, and each storage space is provided. A partition is provided between each storage space. More specifically, the first partition 54 is provided between the upper refrigerator compartment 11 and the middle vegetable compartment 12 . In addition, a second partition 55 is provided between the vegetable compartment 12 on the middle floor and the freezer compartment 13 on the lower floor. In addition, the arrangement position of each storage space is not limited to this.

In this embodiment, the surface on which the door is provided is called the front surface or the front surface of the refrigerator. Furthermore, with the front surface as a reference, each surface of the refrigerator 1 is defined as an upper surface, a side surface, a back surface, and a bottom surface based on the position existing when the refrigerator 1 is installed in a normal state. In addition, when the refrigerator 1 is placed on the installation surface, the up-down direction of the refrigerator 1 is called the up-down direction of the refrigerator 1 (or the heat insulation box 50, etc.). In addition, when the refrigerator 1 is placed on the installation surface, the front-to-back direction of the refrigerator 1 when viewed from the front is called the front-to-back direction of the refrigerator 1 (or the heat insulating box 50 or the like).

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

In addition, a control unit (not shown) is provided inside the refrigerator 1 . This control unit controls the operation of the refrigeration cycle. That is, the control unit drives the compressor 31 to start the operation of the refrigeration cycle, and the refrigerant circulates in the cycle. As shown in FIG. 1 , the compressor 31 is disposed in the machine room 30 provided on the back side of the bottom of the refrigerator 1 .

The cooler 32 is arranged in the cooling chamber 35 provided on the back side of the refrigerator 1 . In addition to the cooler 32, the cooling chamber 35 is provided with a cooling fan 33 and the like. The cooling fan 33 is provided to circulate air between the cooling chamber 35 and each storage space. The cooling chamber 35 is connected to the cold air duct 41 . The cold air duct 41 serves as a cold air passage for supplying the cold air generated in the cooling chamber 35 to the refrigerator compartment 11 and the like.

(Construction of heat insulation 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. FIG. 2 shows the appearance of the heat insulating box 50 when viewed from the front side (the opening 50e side). The heat insulating box 50 is provided to cover the outer periphery of the refrigerator 1 . The heat insulating box 50 is mainly composed of an upper surface portion, a side surface portion 50b, a back surface portion 50c, and a bottom surface portion. The front side of the heat insulating box 50 is an open opening 50e.

As shown in FIG. 1 , the thermal insulation box 50 mainly includes an outer box 60 , an inner box 70 , a vacuum insulation 51 , a foam insulation 52 and at least one partition (for example, a first partition 54 and a second partition Part 55).

The outer box 60 forms the outer peripheral surface of the heat insulating box 50 . The outer box 60 mainly consists of an upper surface part 60a, a side part 60b, a back part 60c, and a bottom surface part (refer FIG. 3). The inner box 70 forms the inner peripheral surface of the heat insulating box 50 . The inner box 70 is mainly composed of an upper surface part, a side surface part 70b, a back surface part 70c, and a bottom surface part 70d (see FIG. 2 ). The inner box 70 forms the inner wall of the storage space (for example, the refrigerator compartment 11, the vegetable compartment 12, the freezing compartment 13) and the rear wall of the cooling chamber 35.

The interior of the heat insulating box 50 formed by the inner box 70 is divided into a plurality of spaces by at least one partition. In this embodiment, two partition parts, a first partition part 54 and a second partition part 55 are provided. The first partition 54 is arranged between the refrigerator compartment 11 and the vegetable compartment 12 . The second partition 55 is arranged between the vegetable compartment 12 and the freezing compartment 13 .

In addition, a space for arranging the machine room 30 is formed on the back side of the bottom of the heat insulating box 50 . The machine room 30 is arranged outside the heat insulating box 50 . This is because the compressor 31 is operating and the temperature in the machine room 30 rises. The machine room 30 is mainly divided by the bottom plate 62 constituting the bottom surface of the outer box 60 .

In this way, the machine room 30 and the freezing room 13 are isolated by the heat insulating box 50 . Therefore, the heat generated in the machine room 30 can be suppressed from flowing into the freezing chamber 13 .

The vacuum insulation member 51 and the foam insulation member 52 are provided in the space between the outer box 60 and the inner box 70 . The vacuum insulation material 51 is also called a VIP, and is a thin sheet-like or plate-like heat insulation material. For example, the vacuum heat insulating materials 51 are respectively arranged on the side surfaces, the upper surface, the bottom surface, the back surface, etc. of the refrigerator 1 . In FIG. 1 , illustration of the vacuum heat insulating material arranged on the bottom surface of the refrigerator 1 is omitted. As shown in FIG. 1 etc., the vacuum heat insulating material 51 is arrange|positioned in the heat insulation box 50 on the outer box 60 side.

The foamed heat insulator 52 may be formed of, for example, foamed polyurethane (also called rigid polyurethane foam) or the like. The foam heat insulating material 52 is also filled in the second partition part 55 that partitions the vegetable compartment 12 as a refrigerated storage space and the freezing compartment 13 as a frozen storage space. In this embodiment, the inside of the first partition 54 that partitions the refrigerator compartment 11 and the vegetable compartment 12, both of which are refrigerated storage spaces, is not filled with the foamed heat insulating material 52. A heat insulator different from the foam heat insulator 52 may be disposed inside the first partition 54 . In addition, in other embodiments, the inside of the first partition 54 may also be filled with the foamed heat insulating material 52 .

The foamed heat insulating member 52 injects liquid foamed polyurethane material (also called foamed heat insulating member material and heat insulating material) into the heat insulating box 50, so that the material foams in the heat insulating box 50. Thereby, it is filled in the heat insulation box 50 . The back portion 60c of the outer box 60 is provided with an injection port 58 for injecting the heat insulating material (see FIG. 5 ). In this embodiment, two injection ports 58 are provided near the left end of the back portion 60c, and two injection ports 58 are provided near the right end of the back portion 60c. A total of four injection ports 58 are provided. . However, the number of injection ports 58 is not limited to this.

FIG. 2 shows the heat insulating box 50 when the foamed polyurethane material is injected into the heat insulating box 50 . When the polyurethane foam material is injected into the heat insulating box 50 , as shown in FIG. 2 , only the second partition 55 is installed inside the heat insulating box 50 . Accordingly, when the foam heat insulating material is injected from the injection port 58 , the foam heat insulating material is also filled into the inside of the second partition 55 via the polyurethane inlet provided between the inner box 70 and the second partition 55 52.

(About the thickness of the side walls of the insulated box and the thickness of the vacuum insulation) In recent refrigerators, for the purpose of ensuring a larger interior space, it is desired to reduce the thickness of the side wall of the heat insulating box 50 . Therefore, in this embodiment, the wall thickness of each surface (for example, the side part 50b) of the heat insulation box 50 is made thin.

FIG. 4 schematically shows the structure within the side wall of the heat insulating box 50 . FIG. 4 is a cross-sectional view of the heat insulating box 50 taken along line A-A shown in FIG. 3 . In addition, in FIG. 4 , a part of the heat insulating box 50 (a portion surrounded by a dotted frame) is shown in an enlarged manner.

The average thickness of the side part 50b of the heat insulation box 50 of this embodiment is, for example, 25 mm or more and 35 mm or less. Furthermore, in the side portion 50b of the heat insulating box 50, the area where the thickness T2 of the foamed heat insulating material 52 facing the vacuum heat insulating material 51 is smaller than the thickness T1 of the vacuum heat insulating material 51 is larger than the thickness T2 of the vacuum heat insulating material 51. There are more areas above T1.

The thickness T1 of the vacuum heat insulating material 51 arranged in the side part 50b is substantially constant over the entire area of the vacuum heat insulating material. In one example, the thickness T1 of the vacuum heat insulating material 51 is set to 10 mm or more and 30 mm or less, preferably 15 mm or more and 25 mm or less.

On the other hand, the thickness T2 of the foam heat insulating material 52 differs in each part according to the outer shape of the heat insulating box 50 (especially the shape of the inner box 70). As described above, in the side portion 50b of the heat insulating box 50, the thickness T1 is larger than T2 in most, at least half or more of the area where the vacuum insulation material 51 exists. Therefore, the thickness T2 of the foam insulation 52 in most of the area where the vacuum insulation 51 of the side part 50b exists is set to, for example, 5 mm or more and 15 mm or less, preferably 8 mm or more and 13 mm or less.

In one example, the thickness T1 of the vacuum heat insulating material 51 can be approximately twice the thickness T2 of the foam heat insulating material 52 . In this way, by increasing the proportion of the vacuum heat insulating material 51 in the side part 50b, the thickness of the entire side part 50b can be further reduced.

In addition, the thickness of the vacuum heat insulating material arranged on the surface other than the side surface 50b of the heat insulating box 50 (that is, the upper surface, the back surface 50c, and the bottom surface) may be the same as the thickness T1, or may be different. In addition, the thickness of the foamed heat insulating material 52 of the surface part other than the side part 50b of the heat insulating box 50 (ie, the upper surface part, the back part 50c, and the bottom surface part) may be the thickness of the vacuum heat insulating material 51 arrange|positioned in this surface part. The thickness may be greater than or equal to the thickness of the vacuum heat insulating material 51 or less.

For example, in the back surface part 50c, the thickness of the foam heat insulating material 52 arrange|positioned in the back surface part 50c may be greater than the thickness of the vacuum heat insulating material 51 arrange|positioned in the back surface part 50c. The back portion has a tendency to pass pipes, electrical wiring, etc. of the refrigeration circuit connected to the cooler 32. In order to secure these pipes, wiring, etc. and ensure thermal insulation, the foam heat insulating material 52 is preferably arranged in the back portion 50c. The thickness has a thickness above a certain level. In addition, the back part 50c is often filled with the foamed heat insulating material 52 last, and it is considered that the curing of the heat insulating material is progressing compared with other positions. However, by increasing the thickness of the foamed heat insulating material 52 arranged in the back part 50c, It is easy to ensure the fluidity of insulation materials.

(Method for manufacturing heat-insulating box) Next, a method of manufacturing the heat insulating box 50 will be described. FIG. 5 shows the state of injecting heat insulating material into the heat insulating box 50 .

First, components such as the vacuum insulation 51 and the heat dissipation pipe (not shown) are installed at predetermined positions on the inner surfaces of each surface of the outer box 60 (specifically, the upper surface 60a, the side surface 60b, the back surface 60c, etc.). In addition, in-box electrical components, various wiring and other components are installed at predetermined positions of the inner box 70 .

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

Thereafter, a liquid foam heat insulating material (foamed polyurethane material) is injected from the injection port 58 formed in the back surface 60 c of the outer box 60 while the back surface 50 c of the heat insulating box 50 is raised. At this time, the injection nozzle 91 of the heat insulating material injection device is inserted into the injection port 58 (see FIG. 5 ). The material of the foamed heat insulating material discharged from the injection nozzle 91 into the heat insulating box 50 is foamed sequentially from the front surface side (the opening 50e side) to the back side in the space between the outer box 60 and the inner box 70 to increase the volume. filling at the same time. The foamed insulation is then cured.

That is, when the heat insulating material is injected from each injection port 58 with the back surface 60 c of the heat insulating box 50 raised, the heat insulating material passes through the side surface 50 b and the upper surface of the heat insulating box 50 due to gravity. , flowing down toward the lowermost opening 50e.

As described above, in this embodiment, the thickness T1 of the vacuum heat insulating material 51 is larger than the thickness T2 of the foam heat insulating material in most areas of the side portion 50b of the heat insulating box 50. The thickness of the side wall of the heat insulating box 50 becomes thinner, so that the space for the heat insulating material to flow becomes narrower in the side wall, making it difficult for the heat insulating material to flow. If the vacuum insulation material 51 is provided inside the insulation box 50, the flow space of the insulation material becomes narrower. This increases the possibility that voids that are not filled with foamed heat insulating material will be generated in the heat insulating box 50 after the injected heat insulating material is foamed.

For example, when a liquid foamed heat insulating material is injected, if it collides with the wall surface in the heat insulating box 50 , foaming may begin locally at that location, and then the heat insulating material will be removed from the heat insulating box 50 If the front surface side of the product is foamed and filled at the same time, the foamed part may become an obstacle and the filling may become uneven. Particularly in the side part 50b which is thinner than other parts, unfilled positions of the foamed heat insulating material are likely to occur.

(Configuration of the structural support portion of the side wall of the thermal insulation box) Therefore, in this embodiment, a method for promoting the inflow of the foamed heat insulating material is implemented on the side surface portion 70 b of the inner box 70 that forms the inner wall of the side surface portion 50 b of the heat insulating box 50 . The structure will be described below.

FIG. 6 is a cross-sectional view of a part of the cross-sectional view shown in FIG. 4 (a portion of the right side portion 50b surrounded by a solid line frame). FIG. 7 is a cross-sectional view of a part (part A) of the cross-sectional view shown in FIG. 6 . FIG. 8 is a cross-sectional view of a part (part B) of the cross-sectional view shown in FIG. 6 .

FIG. 9 schematically shows a horizontal cross-section when the inside of the vegetable compartment 12 of the heat insulating box 50 is viewed from above. In addition, in FIG. 9 , a part of the heat insulating box 50 (a portion surrounded by a dotted frame) is shown in an enlarged manner. In the overall cross-sectional view of FIG. 9 , illustration of the vacuum heat insulating material 51 is omitted.

As shown in FIG. 2 etc., the inner wall in the box formed by the inner box 70 mainly consists of an upper surface part, a side part 70b, a back part 70c, and a bottom part 70d. The side portion 70b has a portion that partially bulges toward the inside of the box. Examples of such parts include partitions disposed in the box and support portions for supporting structures such as storage containers.

For example, a plurality of shelf support portions are provided as support portions of the support structure in an upper portion of the side portion 70b forming the inside of the refrigerator compartment 11 . The shelf support part holds a shelf (not shown) for dividing the inside of the refrigerator compartment 11 . In this embodiment, a plurality of shelf support parts such as the first shelf support part 21a and the second shelf support part 21b are provided in order from the upper side of the refrigerating compartment 11. Each shelf support part is arranged bilaterally symmetrically on the left side surface part 70b and the right side surface part 70b.

In addition, a holding portion attachment portion 71 is provided as a support portion of the support structure in a lower portion of the side portion 70b forming the inside of the refrigerator compartment 11 . The storage container holder 28 for holding a storage container (not shown) such as a refrigeration box arranged below the refrigeration compartment 11 is attached to the holder attachment part 71 . The storage container holding body 28 is provided with a rail 28 a that holds the storage container in a slidable state in the front-rear direction.

By holding the storage container with the storage container holding body 28, even when the weight of the storage container increases, it can be designed to be able to withstand a load. In addition, since there is no need to form a structure for directly holding the storage container on the side portion 50b of the heat insulating box 50, the structure of the inner wall of the side portion 50b can be simplified.

In the refrigerator 1 of this embodiment, a water supply tank (not shown) is disposed on the lower left side of the refrigerating compartment 11 . Therefore, the holder attachment portion 71 and the container holder 28 are provided only on the side portion 70b located on the right side when viewed from the front. In addition, in other embodiments, the holding portion mounting portion 71 may be arranged bilaterally symmetrically on the left side surface portion 70b and the right side surface portion 70b.

A partition attachment portion 72 is provided on the side portion 70b around the boundary between the refrigerator compartment 11 and the vegetable compartment 12 as a support portion of the support structure. The first partition part 54 is attached to the partition attachment part 72 . The partition mounting portion 72 is arranged bilaterally symmetrically on the left side surface portion 70b and the right side surface portion 70b.

A partition attachment portion 73 is provided on the side portion 70b around the boundary between the vegetable compartment 12 and the freezing compartment 13 as a support portion of the supporting structure. The second partition part 55 is attached to the partition attachment part 73 . The partition mounting portions 73 are arranged bilaterally symmetrically on the left side surface portion 70b and the right side surface portion 70b.

The holding portion attachment portion 71 of each support portion of the support structure has a protrusion 71a above it and a protrusion 71b below it. That is, the storage container holder 28 held by the holder attachment part 71 is sandwiched between the protrusion 71a and the protrusion 71b.

The protrusions 71 a and 71 b serve as wide portions that expand the thickness of the foam heat insulating material 52 in the heat insulating box 50 .

That is, the thickness T2A of the foam heat insulating material 52 at the arrangement position of the protrusion 71 a is greater than the thickness T2 ( Refer to Figure 7). The thickness T2A is, for example, 15 mm or more and 25 mm or less, preferably 17 mm or more and 23 mm or less.

In addition, the thickness T2C of the foam heat insulating material 52 at the arrangement position of the protrusion 71 b is greater than the thickness T2 ( Refer to Figure 7). The thickness T2C is, for example, 15 mm or more and 35 mm or less, preferably 20 mm or more and 30 mm or less.

The thickness T2b of the foam heat insulating material 52 between the protrusions 71a and 71b (that is, the area where the container holder 28 is arranged) is thicker than most of the area of the side portion 50b where the vacuum heat insulating material 51 is present. The thickness T2 of the foam insulation material 52 is slightly larger (see FIG. 7 ). However, the thickness T2b of the foamed heat insulator 52 is smaller than the thickness T2A of the protrusion 71a and the thickness T2C of the protrusion 71b. The thickness T2b is set to 10 mm or more and 20 mm or less, for example.

Thus, when the foamed heat insulating material is injected into the heat insulating box 50, a structure can be obtained in which the foamed heat insulating material can be filled more easily in the heat insulating box. More specifically, the fluidity of the foamed heat insulating material can be improved at the position where the storage container holder 28 is arranged on the side portion 50 b of the heat insulating box 50 .

The partition mounting portion 72 in each support portion of the support structure has a protrusion 72a above it and a protrusion 72b below it. That is, the first partition part 54 attached to the partition attachment part 72 is sandwiched between the protrusion part 72a and the protrusion part 72b.

The protruding portions 72a and 72b serve as wide portions that expand the thickness of the foamed heat insulating material 52 in the heat insulating box 50.

That is, the thickness T2C of the foam heat insulating material 52 at the arrangement position of the protrusion 72 a is greater than the thickness T2 ( Refer to Figure 7). The thickness T2C is, for example, 15 mm or more and 35 mm or less, preferably 20 mm or more and 30 mm or less.

In addition, the thickness T2E of the foam heat insulating material 52 at the arrangement position of the protrusion 72 b is greater than the thickness T2 ( Refer to Figure 7). The thickness T2E is, for example, 15 mm or more and 25 mm or less, preferably 17 mm or more and 23 mm or less.

The thickness T2d of the foam insulation 52 between the protrusions 72a and 72b (that is, the area where the first partition 54 is arranged) and the thickness of most of the area of the side portion 50b where the vacuum insulation 51 is present are The thickness T2 of the foam insulation 52 is the same or slightly smaller (see FIG. 7 ). The thickness T2d is set to, for example, 5 mm or more and 13 mm or less.

In this manner, in the side portion 50b of the heat insulating box 50 in the area where the first partition 54 is arranged, the area through which the foamed heat insulating material can pass tends to become narrower. Therefore, by providing the protrusions 72a and 72b above and below the first partition 54 to expand the thickness of the foam insulation material 52 in the heat insulation box 50, it is possible to improve the heat generation at the arrangement position of the first partition 54. The fluidity of foam insulation materials. Accordingly, when the foamed heat insulating material is injected into the heat insulating box 50, a structure can be obtained in which the foamed heat insulating material can be easily filled in the heat insulating box.

In addition, in this embodiment, the storage container holder 28 and the first partition part 54 are arranged in a state close to each other in the vertical direction (for example, a state in which the distance between them is approximately 10 cm or less). In the case of such a structure, the protrusion 71b (or 72b) located between the container holder 28 and the first partition 54 can be formed in a general-purpose structure. Furthermore, the thickness T2C of the foam heat insulating material 52 located between the storage container holder 28 and the first partition part 54 is made larger than the foam heat insulating material in most of the area of the side part 50 b where the vacuum heat insulating material 51 is present. 52 thickness T2.

Therefore, the fluidity of the foamed heat insulating material can be improved from the arrangement position of the storage container holder 28 to the arrangement position of the first partition 54, so that when the foamed heat insulating material is injected into the heat insulating box 50, the flowability can be improved. It is easier to fill the insulation box with foam insulation material. In addition, the strength of the heat insulating box 50 from the position where the storage container holder 28 is disposed to the position where the first partition 54 is disposed can be improved.

The partition mounting portion 73 in each support portion of the support structure has a protrusion 73a above it and a protrusion 73b below it. That is, the second partition part 55 attached to the partition attachment part 73 is sandwiched between the protrusion part 73a and the protrusion part 73b.

The protruding portions 73a and 73b serve as wide portions that expand the thickness of the foam heat insulating material 52 in the heat insulating box 50.

That is, the thickness T2F of the foam heat insulating material 52 at the arrangement position of the protrusion 73 a is greater than the thickness T2 of the foam heat insulating material 52 in most, at least half, of the area of the side portion 50 b where the vacuum heat insulating material 51 is present (see Figure 8). The thickness T2F is, for example, 15 mm or more and 25 mm or less, preferably 17 mm or more and 23 mm or less.

In addition, the thickness T2H of the foamed heat insulating material 52 at the arrangement position of the protrusion 73b is greater than the thickness T2 ( Refer to Figure 8). The thickness T2H is, for example, 15 mm or more and 25 mm or less, preferably 17 mm or more and 23 mm or less.

The thickness T2g of the foam insulation 52 between the protrusions 73a and 73b (that is, the area where the second partition 55 is arranged) is different from the thickness T2g of most of the area of the side portion 50b where the vacuum insulation 51 is present. The thickness T2 of the foam heat insulating material 52 is the same or slightly smaller (see FIG. 8 ). Thickness T2g is set to 5 mm or more and 13 mm or less, for example.

The area of the side part 50b where the partitions 54 and 55 are arranged is not directly facing the storage room. Since the partitions 54 and 55 are equipped with heat insulators, even if the foam heat insulator T2 on the inner box side is thin, the heat insulator T2 is thin. The insulation of the storage room also has less impact. Furthermore, by providing a large step difference between the upper and lower protrusions provided in the partitions 54 and 55, the partitions 54 and 55 can be more reliably inserted between the protrusions, so that the partitions spanning the left and right can be used as Structure works. For this reason, the thicknesses T2d and T2g of the partition portions 54 and 55 may be equal to or less than the thickness T2.

In addition, since the back side of the storage container holder 28 faces the storage room, it is desirable to ensure heat insulation. Moreover, the intensity|strength of the storage container holder 28 which supports the storage container in the refrigerator compartment 11 may be lower than the area|region where the partition parts 54 and 55 are arrange|positioned. Therefore, it is preferable that the thickness T2b of the back side of the storage container holder 28 is thickness T2 or more. In this way, the thickness of the foam heat insulating material between the protrusions can be set according to the necessity of strength and heat insulation properties.

In this manner, in the side portion 50b of the heat insulating box 50 in the area where the second partition 55 is arranged, the area through which the foamed heat insulating material can pass tends to become narrower. Therefore, by providing the protrusions 73a and 73b above and below the second partition 55 to expand the thickness of the foam insulation material 52 in the heat insulation box 50, it is possible to improve the heat generation at the arrangement position of the second partition 55. The fluidity of foam insulation materials. Thus, when the foamed heat insulating material is injected into the heat insulating box 50, a structure can be obtained in which the foamed heat insulating material can be easily filled in the heat insulating box.

However, on the back side below the vegetable compartment 12 where the second partition 55 is arranged, a vegetable compartment cold air duct member 43 forming the cold air duct 41 and a water supply pipe installation portion 67A for providing a water supply pipe for supplying water to the ice maker are formed. , and various structures such as the cold air return port 47 (see Figure 9). In this embodiment, the vegetable compartment cold air duct member 43 is arranged in the center part in the left-right direction, the water supply pipe installation part 67A is arranged on the left side, and the return port 47 is arranged on the right side.

As described above, such a structure disposed on the back surface of the second partition 55 may become an obstacle that may hinder the flow of the foam heat insulating material. For example, between the vegetable compartment cold air duct member 43 and the water supply pipe installation part 67A, there is a narrow width part 59a (refer to FIG. 9 ) which is close to each other. In addition, between the vegetable compartment cold air duct member 43 and the return port 47, there is a narrow-width portion 59b (refer to FIG. 9 ) that is close to each other.

Due to the presence of such narrow width portions 59a and 59b, a portion is formed in the second partition portion 55 where the inflow of the heat insulating material is suppressed when the foam heat insulating material is filled. Thereby, a void which is not filled with the foam heat insulating material may be generated in the second partition part 55 .

Therefore, in this embodiment, the thickness of the side portion 50b of the heat insulating box 50 at the arrangement position of the second partition 55 is set so that the back side is larger than the door side. Specifically, the step portion 56 is provided between the back side and the door side of the side portion 50b of the heat insulating box 50 at the arrangement position of the second partition 55 (see FIG. 9 ). The step portion 56 is provided on the side portion 70b of the inner box 70 .

Therefore, the thickness T3 on the back side of the side portion 50b at the arrangement position of the second partition 55 is larger than the thickness T4 on the door side. In one example, the thickness T3 is set to 30 mm or more and 55 mm or less, preferably 35 mm or more and 45 mm or less, and the thickness T4 is set to 15 mm or more and 45 mm or less, preferably 25 mm or more and 35 mm or less.

When the thicknesses T3 and T4 are set as described above, the thickness T2 of the foam heat insulating material 52 on the door surface side of the step portion 56 may be, for example, 5 mm or more and 15 mm or less (preferably 8 mm or more and 13 mm or less). On the other hand, the thickness T2a (refer to FIG. 9 ) of the foam heat insulating material 52 at the back side of the step portion 56 may be, for example, 10 mm or more and 35 mm or less (preferably 15 mm or more and 25 mm or less).

Thus, when the foamed heat insulating material is injected into the heat insulating box 50, a structure can be obtained in which the foamed heat insulating material can be filled more easily in the heat insulating box. More specifically, the inflow of the foam heat insulating material into the back surface portion within the second partition 55 can be promoted.

(Summary of the first embodiment) As described above, the refrigerator 1 of this embodiment includes the heat insulating box 50 . The heat insulation box 50 has an inner box 70 and an outer box 60 . A vacuum heat insulating material 51 is arranged on the outer box side of the heat insulating box 50 . The inside of the heat insulating box 50 is filled with foam heat insulating material 52 . At least one injection port 58 for injecting the material of the foamed heat insulation material is provided on the back surface of the heat insulation box 50 .

In the side portion 50b of the heat insulating box 50, the thickness T1 of the vacuum heat insulating material 51 is greater than the thickness T2 of the foam heat insulating material 52 in most, at least half, of the area where the vacuum heat insulating material 51 is present. A support portion (specifically, a holding portion mounting portion 71 , a partition mounting portion 72 , and a partition mounting portion 73 ) for supporting a structure disposed in the box is provided on the side wall of the inner box 70 . Above and below the support portion are The lower part becomes a wide part where the thickness of the foam heat insulating material is expanded.

That is, in the holding part attachment part 71, the protrusion 71a is provided above and the protrusion 71b is provided below. In addition, the partition mounting portion 72 is provided with a protrusion 72a above it and a protrusion 72b below it. In addition, the partition mounting portion 73 is provided with a protrusion 73a above it and a protrusion 73b below it.

According to the above-described structure, when the foamed heat insulating material is injected into the heat insulating box 50, a structure can be obtained in which the foamed heat insulating material can be filled more easily in the heat insulating box. More specifically, the fluidity of the foamed heat insulating material can be improved in the arrangement positions of the container holder 28, the first partition 54, and the second partition 55.

As described above, according to the heat insulating box 50 of this embodiment, when the foamed heat insulating material is injected, the foamed heat insulating material can be made to flow more easily in the heat insulating box. Thereby, the side surface part of the heat insulation box 50 can be made thin, and the possibility that a site|part which is not filled with the foam heat insulating material will occur inside the heat insulation box 50 can be reduced.

<Second Embodiment> Next, a second embodiment of the present invention will be described. In the above-mentioned first embodiment, the configuration in which the storage container holder 28 and the first partition portion 54 are arranged in a state of being close to each other in the vertical direction has been described as an example. However, the storage container holder 28 may be provided at a position separated from the first partition 54 .

In the heat insulating box 50 of the second embodiment, the storage container holder 28 is arranged higher. Therefore, the distance between the container holder 28 and the first partition 54 is separated by 20 cm or more, for example.

In the case of such a structure, the lower protrusion 71b of the storage container holder 28 and the upper protrusion 72a of the first partition 54 exist independently. Furthermore, the thickness of the foam heat insulating material 52 located between the protrusion 71 b and the protrusion 72 a is so thin that it is less than most, or at least half or more of the foam heat insulating material 52 in the area of the side portion 50 b where the vacuum heat insulating material 51 is present. The thickness is the same as T2. Thereby, the inner volume of the heat insulating box 50 can be increased.

<Third Embodiment> Next, a third embodiment of the present invention will be described. In the above-mentioned first embodiment and the like, the storage container and the partition have been described as examples of structures arranged in the box. However, the structure arranged in the box is not limited to these.

In the heat insulating box 50 of the third embodiment, the shelf arranged in the box and the support portion that supports the structure such as the water supply tank are provided with protrusions above and below the support portion. Each protruding portion forms a wide portion that expands the thickness of the foam heat insulating material 52 in the heat insulating box 50 .

According to the heat insulating box 50 of this embodiment, when the foamed heat insulating material is injected, it can be configured to allow the foamed heat insulating material to flow more easily within the heat insulating box. Thereby, the side surface part of the heat insulation box 50 can be made thin, and the possibility that a site|part which is not filled with the foam heat insulating material will occur inside the heat insulation box 50 can be reduced.

(Summary) The heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention has an inner box (for example, the inner box 70) and an outer box (for example, the outer box 60). The heat insulating box has: a vacuum heat insulating member (such as a vacuum heat insulating member 51), which is arranged in the heat insulating box; a foam heat insulating member (such as a foam heat insulating member 52), which is filled in the heat insulating box. The inside of the heat-insulating box; and at least one injection port (for example, the injection port 58), which is arranged on the back of the heat-insulating box and injects the material of the foamed heat insulation piece. On the side portion (for example, side portion 50b) of the heat insulating box, the thickness (for example, thickness T2) of the foamed heat insulating member opposite to the vacuum heat insulating member is smaller than the thickness of the vacuum heat insulating member (e.g., thickness T2). For example, the area with thickness T1) is larger than the area that is equal to or greater than the thickness (eg, thickness T1) of the vacuum heat insulating material, and a support portion (eg, side wall 70b) is provided on the side wall (eg, side portion 70b) of the inner box. , the holding part mounting part 71, the partition mounting part 72, the partition mounting part 73), the support part is to the structure arranged in the box (for example, the storage container holder 28, the first partition 54, the second partition portion 55), and the upper and lower portions of the support portion become wide portions (for example, protrusions 71a, 71b, 72a, 72b, 73a, and 73b) that expand the thickness of the foam heat insulating material.

In the heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention, the structure disposed in the box is a partition (for example, the first partition part) that partitions the inside of the box. 54. Second partition 55).

In the heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention, the structure disposed in the box is a holding body (for example, a storage container) that holds a storage container disposed in the box. Maintaining body 28).

The heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention described above may be configured such that between the (for example, the first partition part 54 and the second partition part 55) and the holder (for example, the storage body) The thickness of the foam insulation member (eg, thickness T2C) between the partition and the container holder 28) is greater than the thickness of the vacuum insulation member (eg, thickness T2). .

Furthermore, another aspect of the invention relates to a refrigerator (eg refrigerator 1). The refrigerator includes the heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention.

It should be understood that the embodiments disclosed this time are illustrative and not restrictive in every respect. The scope of the present invention is shown not by the above description but by the scope of the patent application for invention, and is intended to include meanings equivalent to the scope of the patent application for invention and all changes within the scope. Furthermore, a configuration obtained by combining the configurations of different embodiments described in this specification is also included in the scope of the present invention.

1: Refrigerator 11: Refrigerator 11a: Refrigerator door 12:Vegetable room 13: Freezer 21a: First shelf support part 21b: Second shelf support part 28: Storage container holder 50:Thermal insulation box 50b: Side face 50c: back part 50e:Opening part 51: Vacuum insulation parts 52: Foam insulation parts 54: First partition 55:Second partition 58:Injection port 60:Outer box 60a: Upper face 60b: Side face 60c: back part 62: Base plate 70:Inner box 70b: Side face 70c: back part 70d: Bottom face 71: Holding part and installation part 71a, 71b: protrusion 72:Divider installation part 72a, 72b: protrusion T1, T2, T2A, T2b, T2C, T2d, T2E: Thickness

FIG. 1 is a schematic cross-sectional view showing the internal structure of a refrigerator according to one embodiment of the present invention. FIG. 2 is a perspective view showing the interior structure of the refrigerator heat-insulating box according to the first embodiment. Figure 3 is a side view of the heat insulation box shown in Figure 2 . 4 is a cross-sectional view and a partial cross-sectional view showing the structure of the A-A line portion of the heat insulating box shown in FIG. 3 . FIG. 5 is a perspective view showing a state of injecting a heat insulating material into the heat insulating box shown in FIG. 2 . FIG. 6 is an enlarged cross-sectional view showing a part of the cross-sectional view shown in FIG. 4 . FIG. 7 is an enlarged cross-sectional view showing a part (part A) of the cross-sectional view shown in FIG. 6 . FIG. 8 is an enlarged cross-sectional view showing a part (part B) of the cross-sectional view shown in FIG. 6 . FIG. 9 is a horizontal cross-sectional view of the arrangement position of the second partition part of the heat insulating box shown in FIG. 2 .

28: Storage container holder

50b: Side face

51: Vacuum insulation parts

52: Foam insulation parts

54: First partition

60b: Side face

70b: Side face

70c: back part

71: Holding part and installation part

71a, 71b: protrusion

72:Divider installation part

72a, 72b: protrusion

T1, T2, T2A, T2b, T2C, T2d, T2E: Thickness

Claims (5)

A heat-insulating box, which has an inner box and an outer box, wherein the heat-insulating box has: Vacuum heat insulation piece, which is arranged in the heat insulation box; Foam thermal insulation pieces are filled inside the thermal insulation box; and At least one injection port is arranged on the back of the heat insulation box to inject the material of the foam heat insulation piece, In the side portion of the heat insulating box, a region where the thickness of the foamed heat insulating material facing the vacuum heat insulating material is smaller than the thickness of the vacuum heat insulating material is greater than or equal to the thickness of the vacuum heat insulating material. There are more areas, A support portion is provided on the side wall of the inner box, and the support portion supports a structure arranged in the box, The upper part and the lower part of the said support part become the wide part which expands the thickness of the said foam heat insulating material. The thermal insulation box according to claim 1, wherein, The structure arranged in the box is a partition that partitions the inside of the box. The heat-insulating box according to claim 1 or 2, wherein, The structure arranged in the box is a holding body that holds the storage container arranged in the box. The heat-insulating box according to claim 2 or 3, wherein, At a location where the partition is close to the retaining body, the thickness of the foam heat insulating component located between the separator and the retaining body is greater than the thickness of the vacuum heat insulating component. A refrigerator, which has the heat-insulating box as described in any one of claims 1 to 4.

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