TW202334594A - （無） - Google Patents

Abstract

A refrigerator (1) is provided with a heat insulation box (50). The heat insulation box (50) has an inner box (70) and an outer box (60). A vacuum heat insulation material (51) is arranged inside the heat insulation box (50). The heat insulation box (50) is filled with a foamed heat insulation material (52). In the lateral portion (50b) of the heat insulation box (50), the region where the thickness (T2) of the foamed heat insulation material (52) opposite to the vacuum heat insulation material (51) is less than the thickness (T1) of the vacuum heat insulation material (51) is larger than the region where the thickness (T2) of the foamed heat insulation material (52) is greater than the thickness (T1) of the vacuum heat insulation material (51). In a back portion (50c) of the heat insulation box (50), the thickness (T8) of the foamed heat insulation material (52) in a region opposite to the vacuum heat insulation material (51) is greater than the thickness (T2) of the foamed heat insulation material (52) in a region opposite to the vacuum heat insulation material (51) in the lateral portion (50b) of the heat insulation box (50).

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 perform heat insulation from the surroundings, the refrigerator is provided with a heat insulating box covering the outer periphery of the storage space. The thermal insulation box is composed of an outer box, an inner box and foam insulation materials 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 materials in the thermal insulation box has been proposed. For example, Japanese Patent Application Publication No. 2006-183896 discloses a refrigerator in which a vacuum heat insulating material and a foam heat insulating material are included in a 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.

Technical problems to be solved by the present invention

By using vacuum insulation materials, 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 is possible to produce The voids (voids) of the foam insulation material 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. means of solving problems

One aspect of the present invention relates to a heat-insulating box having an inner box and an outer box. The heat-insulating box is provided with: a vacuum heat-insulating material arranged inside the heat-insulating box; a foam heat-insulating material filled inside the heat-insulating box; and at least one injection port arranged inside the heat-insulating box. The foamed heat insulating material is injected into the back of the heat insulating 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 less than the thickness of the vacuum heat insulating material is larger than the thickness of the vacuum heat insulating material. There are many areas. In the back part of the heat insulating box, the thickness of the foam heat insulating material in the area opposite to the vacuum heat insulating material is thicker than the thickness of the side part of the heat insulating box opposite to the vacuum heat insulating material. The thickness of the foamed heat insulating material is large in the area opposite to the heat insulating material. Invention effect

According to the heat-insulating box of 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 is provided with a refrigerator compartment 11 in an upper section, a vegetable compartment 12 in a middle section, a freezer compartment 13 in a lower section, 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 stage part, a middle stage part, and a lower stage 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 (partition) 55 is provided between the vegetable compartment 12 in the middle section and the freezing compartment 13 in the lower section. In addition, the arrangement position of each storage space is not limited to this.

In this embodiment, the surface provided with the door is called the front or front 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 where the refrigerator 1 exists 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 when viewing the refrigerator 1 from the front is called the front-to-back direction of the refrigerator 1 (or the heat insulation box 50, etc.).

A refrigeration 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 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 material 51 , a foam insulation material 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 .

Furthermore, 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 temperature in the machine room 30 rises due to the operation of the compressor 31 . 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 material 51 and the foam insulation material 52 are provided in the space between the outer box 60 and the inner box 70 . The vacuum insulation material 51 is also called VIP, and is a sheet-like or plate-like insulation material. For example, the vacuum heat insulating materials 51 are respectively arranged on the side surfaces, upper surfaces, bottom surfaces, back surfaces, 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 insulating material 52 may be formed of, for example, foamed polyurethane (also called rigid polyurethane foam) or the like. The foamed 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 foamed heat insulating material 52 is not filled in the first partition part 54 that partitions the refrigerator compartment 11 and the vegetable compartment 12 which are refrigerated storage spaces. A heat insulating material different from the foam heat insulating material 52 may be disposed inside the first partition 54 . Furthermore, 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 material 52 injects liquid foamed polyurethane material (the material of the foamed heat insulating material, also called 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 foamed polyurethane 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 foamed heat insulating material is injected from the injection port 58 , the foamed 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 surface 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, a region 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 of the vacuum heat insulating material 51. There are many areas above T1.

The thickness T1 of the vacuum heat insulating material 51 arranged on the side part 50b is substantially constant over the entire area of one 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 foamed heat insulating material 52 of the side part 50b 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 heat insulating material 51 exists. Therefore, the thickness T2 of the foamed heat insulating material 52 in most of the area where the vacuum heat insulating material 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 portion (that is, the upper surface portion and the bottom surface portion) other than the side surface portion 50b of the heat insulating box 50 may be the same as the thickness T1, or may be different. In addition, the thickness of the foamed heat insulating material 52 on the surface other than the side portion 50b of the heat insulating box 50 (that is, the upper surface and the bottom surface) may be greater than or equal to the thickness of the vacuum heat insulating material 51 disposed on the surface. The thickness may be equal to or less than the thickness of the vacuum heat insulating material 51 .

In addition, the back surface portion 50 c of the heat insulating box 50 tends to have piping and electrical wiring connected to the cooler 32 passing through the refrigeration cycle, and it is required to fix these piping and wiring to further ensure thermal insulation. Therefore, in this embodiment, the thickness T8 of the foam heat insulating material 52 arranged on the back surface part 50c is greater than the thickness T7 of the vacuum heat insulating material 51c arrange|positioned on the back surface part 50c (refer FIG. 6). In addition, in this embodiment, the thickness T7 of the vacuum heat insulating material 51c arranged on the back part 50c of the heat insulating box 50 is the same as or smaller than the thickness T1 of the vacuum heat insulating material 51b arranged on the side part 50b. In one example, the thickness T7 is about half of the thickness T1 (for example, 5 mm or more and 15 mm or less).

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

First, components such as the vacuum heat insulating material 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, with the back surface 50c of the heat insulating box 50 facing upward, a liquid foam heat insulating material (foamed polyurethane material) is injected through the injection port 58 formed in the back surface 60c of the outer box 60 . 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 foamed heat insulating material discharged from the injection nozzle 91 into the heat insulating box 50 is foamed in the space between the outer box 60 and the inner box 70 in an increasing order from the front surface side (the opening 50e side) to the back side. Volume side filling. The foamed insulation is then cured.

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

As described above, in the present 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. Therefore, there is a high possibility that voids not filled with the 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 side of the product is filled while foaming, the partially foamed area may become an obstacle and the filling may become uneven. In addition, the foamed heat insulating material is not filled in the back portion 50 c of the heat insulating box 50 where the heat insulating material reaches last, and voids are easily generated.

(Construction of the back part of the heat-insulating box) Therefore, in this embodiment, the back surface part 50c of the heat insulation box 50 was studied for promoting the inflow of the foam heat insulation material. The structure will be described below.

FIG. 6 schematically shows a horizontal cross-sectional structure of the refrigerating compartment 11 portion of the heat insulating box 50 . FIG. 6 is a cross-sectional view of the B-B line in FIG. 3 . In addition, in FIG. 6 , a part of the side portion 50 b and the back portion 50 c of the heat insulating box 50 (a portion surrounded by a dotted line frame) is shown in an enlarged manner. FIG. 7 shows the appearance structure of the inner box 70 when viewed from the front. FIG. 8 shows a state in which the duct member 42 is attached to the back surface of the refrigerating compartment 11 of the inner box 70 shown in FIG. 7 . FIG. 9 shows the internal structure of the back surface portion 50c of the heat insulating box 50. FIG. 10 schematically shows the diffusion of the injected foam insulation material in the insulation box 50 .

In the heat insulation box 50 of this embodiment, the average thickness of the back surface part 50c is larger than the average thickness of the side surface part 50b. In one example, the average thickness of the back part 50c is 35 mm or more and 40 mm or less.

In addition, in the back part 50c of the heat insulating box 50, the thickness T8 of the foamed heat insulating material 52 in the area facing the vacuum heat insulating material 51c is larger than the thickness T8 of the foamed heat insulating material 52 in the area facing the vacuum heat insulating material 51b of the side part 50b. Thickness T2 of the heat insulating material 52 . Moreover, in this embodiment, the thickness T7 of the vacuum heat insulating material 51c arrange|positioned at the back part 50c of the heat insulation box 50 is smaller than the thickness T1 of the vacuum heat insulating material 51b arrange|positioned at the side part 50b.

In one example, the thickness T7 is about half of the thickness T1 (for example, 5 mm or more and 15 mm or less). In addition, in one example, the thickness T8 is more than twice the thickness T2 (for example, 15 mm or more and 40 mm or less).

Furthermore, the thickness T8 of the foam heat insulating material 52 arranged on the back surface part 50c is more than the thickness T7 of the vacuum heat insulating material 51c arrange|positioned on the back surface part 50c.

In this way, in the back surface part 50c of the heat insulation box 50, the relative ratio of the thickness of the foam heat insulation material 52 is high compared with the side surface part 50b etc.

In the formation process of the foamed heat insulating material 52, the heat insulating material is injected in the state shown in FIG. 5, so the back portion 50c of the heat insulating box 50 has a smaller inflow of the heat insulating material than the side portion 50b and the like. Tendency to delay timing. The foamed heat insulating material injected from the injection port 58 first flows into the side portion 50b directly below, and then expands upward from the opening 50e to flow in as shown by the arrow in FIG. 10 . Thereafter, the foamed heat insulating material expands toward the center from the side close to the side portion 50b and flows into the back portion 50c. The viscosity of injected foam insulation increases over time. Therefore, when the heat insulating material flows into the back portion 50 c, the viscosity of the heat insulating material becomes higher.

In the present embodiment, the volume into which the heat insulating material flows (that is, the area other than the area occupied by the vacuum heat insulating material 51) is relatively large in the back portion 50c of the heat insulating box 50. Therefore, even if the insulation material has a higher viscosity, Hot materials also tend to flow into the space.

Therefore, according to the above-mentioned structure, it is possible to reduce the occurrence of unfilled portions (voids) of the foamed heat insulating material in the back surface portion 50 c of the heat insulating box 50 . In addition, by increasing the proportion of the foamed heat insulating material 52 in the back portion 50c, the strength of the heat insulating box 50 can be improved.

In addition, a recessed portion 48 extending up and down is provided at substantially the center portion in the left-right direction of the back portion 70 c of the inner box 70 . In the present embodiment, the recessed portion 48 is provided in the box of the refrigerating compartment 11 and is recessed in a direction to expand the inner volume of the box (see FIG. 6 ).

The thickness T8b of the foamed heat insulating material 52 in the area corresponding to the recessed portion 48 is smaller than the thickness T8 of the foamed heat insulating material 52 in other areas of the back portion 50c. In one example, the thickness T8b is 10 mm or more and 30 mm or less.

The portion where the recessed portion 48 is provided corresponds to the final arrival area of the injected foam insulation material. Therefore, by providing the recessed portion 48 to locally narrow the space in the back portion 50c, the filling amount of the foamed heat insulating material can be reduced, and the occurrence ratio of unfilled portions (voids) can be reduced.

Furthermore, it is preferable that the thickness of the recessed portion 48 is sufficient to allow the foamed heat insulating material to flow. Therefore, the thickness T8b is preferably larger than the thickness T2, and is preferably 15 mm or more, for example.

It is preferable that at least one exhaust hole 49 is provided in the recess 48 . When the heat insulating material is injected into the heat insulating box 50 and the internal heat insulating material foams and expands, the air existing in the heat insulating box 50 can be discharged through the exhaust hole 49 . Thereby, the pressure increase in the heat insulation box 50 can be suppressed, and the inflow of the foam heat insulation material into the recessed part 48 can be promoted. Moreover, in this embodiment, the exhaust hole 49 is also provided in the back surface part 70c of the inner box 70 other than the recessed part 48 (refer FIG. 7 etc.). In FIG. 7 , in order to facilitate understanding of the arrangement position of the exhaust holes, a part of the exhaust holes 49 formed on the back surface 70 c of the inner box 70 is shown in an enlarged state.

In addition, a duct member (duct forming member) 42 is arranged on the inner wall of the back portion 70 c of the inner box 70 so as to cover the recessed portion 48 (see FIG. 8 ). By disposing the duct member 42 in the recessed portion 48, a cold air duct area can be secured in the recessed portion. Thereby, the volume inside the box can be enlarged. In addition, the exhaust hole 49 formed in the recessed portion 48 can be covered and hidden with the duct member 42 .

The pipe member 42 is fixed to the back surface 70c of the inner box 70 using screws or the like. The recessed portion 48 of the inner box 70 is provided with a screw fixing portion 42A into which screws are inserted. In this embodiment, a large number of exhaust holes 49A are formed around the screw fixing portion 42A (see FIG. 7 and the like). This allows the foamed heat insulating material to flow preferentially into the screw-fixed portion 42A, thereby improving the strength of the screw-fixed portion 42A.

Furthermore, when forming the exhaust hole 49 in the inner box 70, it is preferable to drill it from the inside of the box toward the inside of the heat insulating box. This can provide a structure in which the foamed heat insulating material in the heat insulating box 50 is unlikely to leak even though the air is discharged from the inside of the heat insulating box 50 through the exhaust hole 49 .

A foamed styrene (heat-insulating structure) 69 is provided on the inner box 70 side in the back portion 50 c of the heat-insulating box 50 at substantially the center portion in the left-right direction and the up-down direction (see FIG. 9 ). The foamed styrene 69 is installed inside the heat insulating box 50 before the foamed heat insulating material is injected.

The substantially central portion in the left-right direction and the up-down direction in the back portion 50c of the heat insulating box 50 corresponds to the final arrival area of the foamed heat insulating material injected from each injection port 58 (see FIG. 10 ). Compared with other areas, this area is less likely to be filled with foam insulation material and is more likely to become an unfilled area (void). Therefore, for example, by arranging a heat insulating structure such as a rectangular parallelepiped-shaped foamed styrene 69 in this area in advance, the occurrence of voids can be suppressed.

As above, the specific structure of the back surface part 50c of the upper stage part (ie, the refrigeration compartment 11 side) of the heat insulation box 50 was demonstrated. Detailed description of the back portion 50c of the middle portion (ie, the vegetable compartment 12 side) and the lower portion (ie, the freezing compartment 13 side) of the heat insulating box 50 is omitted, but the same structure as the upper portion can be applied. That is, in the back part 50c of the middle section and the lower section of the heat insulating box 50, the thickness T8 of the foamed heat insulating material 52 which accounts for more than half of the area where the vacuum heat insulating material 51 exists is also thicker than the foamed insulation of the side part 50b. The thickness T2 of the thermal material 52 is large.

(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 in the heat insulating box 50 . The inside of the heat insulating box 50 is filled with a foamed heat insulating material 52 . At least one injection port 58 for injecting foam 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, a region 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 greater than or equal to the thickness T1 of the vacuum heat insulating material 51. There are many areas. In addition, in the back portion 50c of the heat insulating box 50, the thickness T8 of the foamed heat insulating material in the area facing the vacuum heat insulating material 51 is larger than that of the side portion 50b of the heat insulating box 50 facing the vacuum heat insulating material 51. The thickness of the foam insulation material in the area is T2.

According to the above configuration, in the back portion 50c of the heat insulating box 50, the volume into which the heat insulating material flows (that is, the area other than the area occupied by the vacuum heat insulating material 51) is relatively large. Therefore, even if the heat insulating material has a higher viscosity, Materials also flow easily into the space. Therefore, the occurrence of unfilled portions (voids) of the foamed heat insulating material in the back surface portion 50 c of the heat insulating box 50 can be reduced.

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 insulation material may arise in the heat insulation box 50 can be reduced.

<Second Embodiment> Next, a second embodiment of the present invention will be described. The following description will focus on configurations different from those of the first embodiment.

In the first embodiment, the specific structure of the back surface portion 50c of the upper portion (that is, the refrigerating compartment 11 side) of the heat insulating box 50 has been described. In this embodiment, the specific structure of the back surface part 50c of the middle part (that is, the vegetable compartment 12 side) and the lower part (that is, the freezing chamber 13 side) of the heat insulation box 50 is demonstrated.

Similar to the upper section of the heat insulating box 50, in the back portion 50c of the middle section and the lower section of the heat insulating box 50, the thickness T8 of the foamed heat insulating material 52 in the area opposite to the vacuum heat insulating material 51c is also greater than The thickness T2 of the foamed heat insulating material 52 in the area facing the vacuum heat insulating material 51b of the side portion 50b.

In one example, the thickness T8 of the foam heat insulating material 52 in the middle portion of the back portion 50c is, for example, 15 mm or more and 30 mm or less. The temperature in the vegetable compartment 12 located in the middle portion tends to be slightly higher than that in the refrigerator compartment 11. Therefore, the thickness T8 of the foam heat insulating material 52 in the middle portion of the back portion 50c may be smaller than the foam heat insulating material in the upper portion. 52 thickness. Thereby, the inner volume of the vegetable compartment 12 can be increased.

In one example, the thickness T8 of the foam heat insulating material 52 in the lower portion of the back surface portion 50c is, for example, 15 mm or more and 45 mm or less. The temperature in the freezer compartment 13 located in the lower section is lower than that in the refrigerator compartment 11, so the thickness T8 of the foam insulation material 52 in the lower section of the back portion 50c is preferably greater than the thickness T8 of the foam insulation material 52 in the upper section.

(Summary) The heat-insulating box (eg, the heat-insulating box 50 ) related to one aspect of the present invention has an inner box (eg, the inner box 70 ) and an outer box (eg, the outer box 60 ). The heat-insulating box includes: a vacuum heat-insulating material (eg, vacuum heat-insulating material 51) disposed in the heat-insulating box; and a foamed heat-insulating material (eg, foam insulation) filled inside the heat-insulating box. Thermal material 52); and at least one injection port (for example, injection port 58) disposed on the back of the thermal insulation box and injecting the foam thermal insulation material. On the side portion of the heat insulating box (for example, the side portion 50b), the thickness of the foamed heat insulating material opposite to the vacuum heat insulating material (eg, thickness T2) is smaller than the thickness of the vacuum heat insulating material (eg, thickness T2). The area T1) is larger than the area above the thickness of the vacuum heat insulating material (for example, thickness T1). In the back part of the heat insulating box (for example, the back part 50c), the area opposite to the vacuum heat insulating material is The thickness of the foamed heat insulating material in the area (for example, thickness T8) is greater than the thickness of the foamed heat insulating material in the area of the side portion of the heat insulating box opposite to the vacuum heat insulating material (for example, thickness T8). T2).

In the above-mentioned heat insulating box (for example, the heat insulating box 50) according to one aspect of the present invention, the injection port (for example, the injection port 58) is arranged at the end of the back surface in the left-right direction. The back surface of the inner box (for example, the inner box 70) is provided with a recessed portion (for example, the recessed portion 48) extending up and down at a substantially central portion in the left-right direction.

In the heat-insulating box (for example, the heat-insulating box 50) which concerns on one aspect of this invention mentioned above, at least one hole (for example, the exhaust hole 49) may be provided in the recessed part (for example, the recessed part 48).

In the heat-insulating box (for example, the heat-insulating box 50) according to one aspect of the present invention, a wall on the inner side of the back surface of the inner box (for example, the inner box 70) may be provided to cover the recessed portion ( A duct-forming member (eg, duct member 42) arranged in a manner such as a recess 48).

In the above-described heat insulating box (for example, the heat insulating box 50) according to one aspect of the present invention, the inner box (for example, the back surface 50c) in the back surface of the heat insulating box may be For example, on the inner box 70) side, a heat insulating structure (for example, foamed styrene 69) is provided at substantially the center portion in the left-right direction and the up-down direction.

Furthermore, another aspect of the invention relates to a refrigerator (eg refrigerator 1). This refrigerator includes the heat-insulating box (for example, the heat-insulating box 50) related 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 indicated by the claims for invention and not by the above description, and includes all changes within the scope and equivalent meanings to the claims for invention. In addition, a structure obtained by combining the structures 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 12a:Vegetable room door 13: Freezer 13a: Freezer door 31:Compressor 32:Cooler 33: Cooling fan 41:Air conditioning duct 42: Pipe parts (pipe forming parts) 42A: Screw fixing part 48: concave part 49, 49A: Vent (hole) 50:Thermal insulation box 50b: Side part (of the heat-insulating box) 50c: Back part (of the insulated box) 50e:Opening part 51, 51b, 51c: Vacuum insulation materials 52: Foam insulation material 54: First partition 55:Second partition 58:Injection port 60:Outer box 60a: Upper face 60b: Side face 60c: back part 62: Base plate 69: Foamed styrene (heat-insulating structure) 70:Inner box 70b: Side part (of the inner box) 70c: Back part (of the inner box) 70d: Bottom face 91:Injection nozzle T1: Thickness of vacuum insulation material on the side of the insulation box T2: The thickness of the foam insulation material on the side of the insulation box T7: Thickness of vacuum insulation material on the back of the insulation box T8, T8b: Thickness of foam insulation material on the back of the insulation box

FIG. 1 is a schematic cross-sectional view showing the internal structure of a refrigerator according to an 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 a horizontal cross-sectional view showing the structure of the B-B line portion of the heat insulating box shown in FIG. 3 . FIG. 7 is a front view showing the structure of the inner box forming the heat insulating box shown in FIG. 2 . FIG. 8 is a front view showing a state in which piping components are attached to the inner box shown in FIG. 6 . FIG. 9 is a perspective view showing a state in which the back surface of the outer box is removed from the heat insulating box shown in FIG. 5 . FIG. 10 is a schematic diagram showing the flow of the foamed heat insulating material in the heat insulating box.

11: Refrigerator

48: concave part

50:Thermal insulation box

50b: Side part (of the heat-insulating box)

50c: Back part (of the heat-insulating box)

50e:Opening part

51b, 51c: Vacuum insulation materials

52: Foam insulation material

70b: Side part (of the inner box)

70c: Back part (of the inner box)

T1: Thickness of vacuum insulation material on the side of the insulation box

T2: The thickness of the foam insulation material on the side of the insulation box

T7: Thickness of vacuum insulation material on the back of the insulation box

T8, T8b: Thickness of foam insulation material on the back of the insulation box

Claims (6)

A heat-insulating box with an inner box and an outer box, which has: Vacuum heat insulation material, which is arranged in the heat insulation box; Foam thermal insulation material, which is filled inside the thermal insulation box; and At least one injection port, which is arranged on the back of the heat insulation box and is used to inject the foam heat insulation material, 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 less than the thickness of the vacuum heat insulating material is larger than the thickness of the vacuum heat insulating material. There are many areas, In the back part of the heat insulating box, the thickness of the foamed heat insulating material in the area opposite to the vacuum heat insulating material is greater than the thickness of the side part of the heat insulating box opposite to the vacuum heat insulating material. The thickness of the foam insulation material in the opposite area. The thermal insulation box according to claim 1, wherein, The injection port is arranged at a left-right end of the back surface, The back surface of the inner box is provided with a recessed portion extending up and down in the center portion in the left-right direction. The thermal insulation box according to claim 2, wherein, At least one hole is provided in the recess. The heat-insulating box according to claim 2 or 3, wherein, A duct forming member is provided on the inner wall of the back surface of the inner box so as to cover the recessed portion. The thermal insulation box according to any one of claims 1 to 4, wherein, A heat insulating structure is provided at the center portion in the left-right direction and the up-down direction on the inner box side in the back portion of the heat insulating box. A refrigerator in which, Having a heat-insulating box as described in any one of claims 1 to 5.

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