TW202219443A - Heat insulation box body , refrigerator , method for manufacturing heat insulation box body - Google Patents

Abstract

The refrigerator has a heat insulation box body. The heat insulation box body has an inner box and an outer box. Vacuum insulation material is arranged in the outer box side in the heat insulation box body. At least one injection port for injecting the material of the foam insulation material is provided on the back of the heat insulation box body. The inner box has a back portion and a side portion, and at the side portion, there is provided at least one protruding portion which is partially raised to the inside of the box. The protruding portion is disposed at a position overlapped with the injection port in the rear view.

Description

Thermal insulation box, refrigerator, and method of manufacturing thermal insulation box

One aspect of the present invention relates to a heat insulation box provided in a refrigerator or the like, and a refrigerator provided with the heat insulation box. In addition, one aspect of the present invention relates to a method of manufacturing a heat insulating box.

In order to heat insulation from the surroundings, the refrigerator is provided with a heat insulation box so as to cover the outer periphery of the storage space. The thermal insulation box is composed of an outer box, an inner box, and a thermal insulation material filled therebetween. As a heat insulating material, foam heat insulating materials, such as a rigid foam urethane heat insulating material, are used, for example.

In recent years, in order to further improve the thermal insulation performance, it has been proposed to arrange a vacuum thermal insulation material in a thermal insulation box. By using the vacuum heat insulating material, the heat insulating performance is improved, and the thickness of the heat insulating box is reduced.

However, as the thickness of the heat insulating box becomes thinner, the space for the foamed heat insulating material in the heat insulating box to flow is narrowed, and it becomes difficult for the foamed heat insulating material to flow. Therefore, after the heat insulating material is foamed, there may be a Cavities (voids) that are not filled with foam insulating material.

Therefore, Japanese Patent Application Laid-Open No. 2019-45144 discloses a structure in a refrigerator in which a side vacuum insulation panel and a foam insulation material are provided in a side part of a thermal insulation space formed between an inner box and an outer box. A filler is installed at the rear of the side vacuum insulation panel, that is, at a position overlapping in the vertical direction with the injection hole of the foaming stock solution of the foaming insulation material provided on the back of the outer box.

However, when further thinning of the heat insulating box progresses, there is still a possibility that voids in which the foamed heat insulating material is not filled are generated.

Therefore, in one Embodiment of this invention, when injecting a foam heat insulation material into a heat insulation box, it aims at providing the structure and manufacturing method which can make it easier to fill a foam heat insulation material in a heat insulation box.

The heat insulating box according to one aspect of the present invention has an inner box and an outer box. The heat insulating box includes a vacuum heat insulating material disposed on the outer box side of the heat insulating box body, and a foam heat insulating material filled in the heat insulating box body. At least one injection port for injecting the material of the foamed heat insulating material is provided on the back of the heat insulating box. The inner box has a back surface portion and a side surface portion, and the side surface portion is provided with at least one protruding portion partially raised inward of the box. And the said extension part is arrange|positioned at the position which overlaps with the said injection port, when it sees from the back.

Moreover, another aspect of this invention relates to the manufacturing method of a heat insulating box. The method for manufacturing a heat insulating box includes attaching an injection nozzle for discharging a material of a foamed heat insulating material to an injection port provided on a rear surface of a heat insulating box having an outer case and an inner case, and injecting the material from the injection nozzle to the The process of injecting the material into the inside of the heat insulating box. In this manufacturing method, if the thickness of the inside of the side portion of the heat insulating box is T1, the vacuum barrier provided inside the side portion of the heat insulating box on the side of the outer box Let the thickness of the heat material (for example, the vacuum heat insulating material 51) be T2, and let the inner diameter of the injection nozzle inserted into the injection port provided on the back surface of the heat insulation box be Φ1, then (T2+Φ1)>T1 The said injection nozzle is attached in the position which overlaps with the protrusion part provided so that the side part of the said inner case may bulge toward the tank inner side part, when it sees from the back.

In the heat insulating box according to one aspect of the present invention, when the foam heat insulating material is injected, the foam heat insulating material can be more easily filled into the heat insulating box. Moreover, the manufacturing method of the heat insulation box which concerns on another aspect of this invention can make it easier to fill the foam heat insulation material into the heat insulation box when injecting a foam heat insulation material.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are assigned to the same members. 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 configuration of the refrigerator 1 according to the first embodiment is described. The internal structure of the refrigerator 1 is shown in FIG.

As shown in FIG. 1 , the refrigerator 1 includes a first refrigerator compartment 11 (hereinafter, also simply referred to as a refrigerator compartment 11 ) on the upper floor, a second refrigerator compartment 12 on the middle floor, and a freezer compartment 13 on the lower floor. The first refrigerator compartment 11 is provided with a refrigerator compartment door 11a. A refrigerator compartment door 12 a is provided in the second refrigerator compartment 12 . The freezer compartment 13 is provided with a freezer compartment door 13a.

As described above, the refrigerator 1 according to the present embodiment is divided into the upper layer part, the middle layer part, and the lower layer part, and each storage space is provided. Partitions 59 are provided between the storage spaces. However, the arrangement position of each storage space is not limited to this.

In this embodiment, the surface in which the door is provided is called the front surface or the front surface of the refrigerator. And each surface of the refrigerator 1 is made into an upper surface, a side surface, a back surface, and a bottom surface based on the position which exists when the refrigerator 1 is installed in a normal state based on the front surface as a reference. In addition, when the refrigerator 1 is placed on the installation surface, the direction of 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-rear direction when the refrigerator 1 is viewed from the front is referred to as the front-rear direction of the refrigerator 1 (or the heat insulation box 50 or the like).

A refrigeration loop is provided inside the refrigerator 1 . The refrigeration loop 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 the refrigerant flows.

In addition, a control unit (not shown) is provided inside the refrigerator 1 . The control unit controls the operation of the refrigeration loop. That is, the control unit starts the operation of the refrigeration loop by driving the compressor 31, and the refrigerant circulates in the loop. As shown in FIG. 1, the compressor 31 is arrange|positioned in the equipment room 30 provided in the back side of the bottom part of the refrigerator 1. As shown in FIG.

The cooler 32 is arranged in the cooling chamber 35 provided on the rear side of the refrigerator 1 . In the cooling chamber 35 , in addition to the cooler 32 , a cooling fan 33 and the like are provided. The cooling fan 33 is provided to circulate air between the cooling chamber 35 and each storage space.

(Constitution of heat insulation box) In the refrigerator 1, the heat insulating box 50 is provided as a heat insulating structure for insulating each storage space from the surroundings. The heat insulating box 50 is provided so as to cover the outer periphery of the refrigerator 1 . As shown in FIG. 1 , the heat insulating box 50 mainly includes an outer case 60 , an inner case 70 , a vacuum heat insulating material 51 , and a foamed heat insulating material 56 . FIG. 2 shows the external appearance of the heat insulating box 50 viewed from the front side.

The outer case 60 forms the outer peripheral surface of the heat insulating case 50 . The outer case 60 is mainly composed of an upper surface portion 60a, a side surface portion 60b, a rear surface portion 60c, and a bottom surface portion. The inner box 70 forms the inner peripheral surface of the heat insulating box 50 . Further, the inner box 70 forms the inner wall of the storage space (eg, the first refrigerating chamber 11 , the second refrigerating chamber 12 , the freezing chamber 13 ) and the rear wall of the cooling chamber 35 .

Moreover, the space for disposing the equipment room 30 is formed in the back surface side of the bottom part of the heat insulation box 50 . The equipment room 30 is arranged outside the heat insulation box 50 . This is because the temperature in the equipment room 30 rises due to the operation of the compressor 31 . The equipment room 30 is mainly divided by the bottom plate 62 which constitutes the bottom surface portion of the outer box 60 .

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

The vacuum heat insulating material 51 and the foamed heat insulating material 56 are provided in the space between the outer case 60 and the inner case 70 . The vacuum heat insulating material 51 is also called VIP, and is a sheet-like or plate-like heat insulating material. The vacuum heat insulating material 51 is respectively arrange|positioned at the side surface, the upper surface, the bottom surface, the back surface, etc. of the refrigerator 1, for example. As shown in FIG. 1 etc., the vacuum heat insulating material 51 is arrange|positioned in the heat insulating box 50 on the outer box 60 side.

The foamed heat insulating material 56 may be formed of, for example, foamed urethane (also referred to as rigid urethane foam) or the like. As shown in FIG. 1, the inside of the partition part 59 which partitions each storage space is also filled with the foam heat insulating material 56. As shown in FIG. Moreover, in the inside of the partition part 59, you may provide the heat insulating material different from the foam heat insulating material 56 provided in the space between the outer case 60 and the inner case 70.

The foamed heat insulating material 56 injects a liquid foamed polyurethane material (also referred to as a foamed heat insulating material, a heat insulating material) into the heat insulating box 50 to foam the material in the heat insulating box 50, Thereby, the inside of the heat insulating box 50 is filled. The back surface part 60c of the outer case 60 is provided with the injection port 58 (refer FIG. 3) which injects a heat insulating material. In the present embodiment, two injection ports 58 are provided in the vicinity of the left end portion of the back surface portion 60c, and two injection ports 58 are provided in the vicinity of the right end portion of the back surface portion 60c, for a total of four injection ports 58 . However, the number of the injection ports 58 is not limited to this.

As shown in FIG. 2 , the inner wall in the box formed by the inner box 70 is mainly composed of an upper surface wall 70a, a side wall (side surface portion) 70b, a rear surface wall (rear surface portion) 70c, and a bottom surface wall 70d. The side wall 70b has a part raised to the inside of a case partially.

For example, the side wall 70b which forms the upper part in the inside of the refrigerator compartment 11 is provided with several shelf support parts as such a raised part. The shelf support part holds a shelf (not shown) for dividing the inside of the refrigerator compartment 11 . In this embodiment, three shelf holding parts of the first shelf support part 21a, the second shelf support part 21b, and the third shelf support part 21c are provided in this order from the upper side of the refrigerator compartment 11. Each shelf support part is symmetrically arrange|positioned at the side wall 70b of the left side, and the side wall 70b of the right side.

Moreover, the side wall 70b which forms the lower part in the box inside the freezer compartment 13 is provided with the container holding|maintenance part 23 as such a raised part. The storage container holding part 23 holds the storage container (not shown) arranged in the freezer compartment 13 . The container holding portion 23 is arranged symmetrically on the left side wall 70b and the right side wall 70b, respectively.

(Manufacturing method of thermal insulation box) Next, the manufacturing method of the heat insulation box 50 is demonstrated. FIG. 3 shows a state in which a heat insulating material is injected into the heat insulating box 50 .

First, components such as vacuum heat insulating material 51 and heat pipes (not shown) are attached to predetermined positions on the inner surface of each surface portion (specifically, upper surface portion 60a, side surface portion 60b, back surface portion 60c, etc.) of outer case 60 . In addition, components such as electric components in the box, various wirings, etc., are attached to predetermined positions of the inner box 70 .

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

Then, in the state which raised the back surface part 60c of the heat insulation box 50, the material (foamed urethane material) of a liquid foam heat insulating material is injected from the injection port 58 formed in the back surface part 60c. At this time, the injection nozzle 91 (refer to FIG. 3 ) of the injection device of the heat insulating material is inserted into the injection port 58 . The material of the foamed heat insulating material discharged from the injection nozzle 91 into the heat insulating box 50 is gradually foamed in the space between the outer case 60 and the inner case 70 from the front surface side (the opening portion 50a side) to the back surface side, and increases while increasing. Fill in volume. The foamed insulating material 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 up, the heat insulating material passes through the side surface and the upper surface of the heat insulating box 50 due to gravity. , and flows down toward the opening 50a located at the bottom.

In recent refrigerators, for the purpose of securing a larger interior space, etc., the thickness reduction of the side wall of the heat insulating box 50 is desired. When the thickness of the side wall of the heat insulating box 50 becomes thin, the space in which the heat insulating material flows in the side wall becomes narrow, and it becomes difficult for the heat insulating material to flow. When the vacuum heat insulating material 51 is provided inside the heat insulating box 50, the flow space of the heat insulating material becomes narrower. Thereby, in the heat insulating box 50, after the injected heat insulating material is foamed, the possibility of generating a cavity (void) in which the foamed heat insulating material is not filled increases. That is, when a liquid foamed heat insulating material is injected, if it collides with the wall surface in the heat insulating box 50, foaming may be partially started at that portion, and then the heat insulating material is removed from the heat insulating box while the heat insulating material is injected. When the front surface side of 50 is filled while being foamed, there is a possibility that the partially foamed portion becomes an obstacle and the filling becomes uneven.

Therefore, in the present embodiment, by limiting the arrangement position of the injection port 58 into which the injection nozzle 91 is inserted to a predetermined location, it is possible to suppress the collision with the wall surface in the heat insulation box 50 when injecting the liquid foam heat insulating material. , the liquid foam heat insulating material can be uniformly distributed on the front surface side of the heat insulating box 50 . Therefore, even in the thinning, it is possible to more favorably fill the foam heat insulating material into the box, and to suppress a decrease in the flow of the injected heat insulating material. This point will be described below.

(About the location of the injection port (or injection nozzle)) FIG. 4 shows the structure of the side surface part inside the box of the heat insulating box 50 . The side surface part of the box inner side of the heat insulation box 50 is comprised by the side wall 70b of the inner box 70. As described above, on the side wall 70b of the inner box 70, for example, the shelf plate support portions 21a to 21c, the container holding portion 23, etc., have portions that partially bulge inward of the box.

The dotted-line frame shown in FIG. 4 is formed by extending the site where the injection nozzle 91 is inserted when injecting the heat insulating material to the front surface side (opening portion 50a side) of the heat insulation box 50 .

An extension of the injection nozzle 91 inserted into the injection port 58 on the upper side of the heat insulating box 50 corresponds to a part of the second shelf support portion 21 b formed on the side wall 70 b of the inner box 70 . The part of the 2nd shelf support part 21b corresponding to the extension part of this injection nozzle 91 is called the extension part 73. As shown in FIG.

Moreover, the extension part of the injection nozzle 91 inserted in the injection port 58 of the lower side of the heat insulation box 50 corresponds to a part of the container holding part 23 formed in the side wall 70b of the inner box 70. A part of the container holding part 23 corresponding to the extension of the injection nozzle 91 is referred to as an extension part 83 .

The extension parts 73 and 83 are provided in the position which overlaps with the injection port 58 provided in the back surface part 60c, when it sees from the back surface (or front view). Thereby, the injection paths 71 and 81 of the heat insulating material injected from the injection nozzle 91 inserted into the injection port 58 are ensured.

FIG. 5 shows the structure of the transverse cross-section of the left side wall 70b of the inner box 70. As shown in FIG. FIG. 5 is a cross-sectional view of the portion taken along the line A-A in FIG. 4 . In FIG. 5, the shape of the extension part 73 formed by a part of the 2nd shelf support part 21b can be confirmed.

Moreover, in the inner box 70, the inclined surface part 72 is provided in the boundary part of the side wall 70b and the back wall 70c. By providing such an inclined surface part 72, the connection part of the side wall 70b and the back wall 70c becomes a chamfered shape. Moreover, the extension part 73 provided in the side wall 70b is provided continuously with the inclined surface part 72. As shown in FIG. Thereby, in the inside of the heat insulation box 50, the injection path 71 of the heat insulating material continuous from the inclined surface part 72 to the extension part 73 can be ensured from the back surface side toward the side surface part. Similarly, in the inside of the heat insulation box 50, the injection path 81 of the heat insulating material continuous from the inclined surface part 72 to the extension part 83 can be ensured from the back surface side toward the side surface part.

FIG. 6 shows the structure of the longitudinal section of the inner case 70 . FIG. 6 is a cross-sectional view of the portion taken along the line B-B in FIG. 4 . FIG. 6 also shows the location of the inner diameter of the injection nozzle 91 of the insulating material. In FIG. 7, the periphery of the 2nd shelf support part 21b of the inner box 70 of the heat insulation box 50 shown in FIG. 6 (broken line frame part shown by C) is enlarged and shown. In FIG. 8 , the periphery of the container holding portion 23 of the inner box 70 of the heat insulation box 50 shown in FIG. 6 is enlarged and shown (the portion shown by the broken line frame in D).

As shown in FIG. 7 , the projecting portion 73 that is a part of the second shelf support portion 21b overlaps with the arrangement position of the injection nozzle 91 inserted into the injection port 58 when viewed from the back (or when viewed from the front). In addition, since the arrangement position of the injection port 58 into which the injection nozzle 91 is inserted includes the arrangement position of the injection nozzle 91 , the arrangement position of the injection port 58 also overlaps with the extension portion 73 .

Furthermore, it is preferable that the disposition area of the injection nozzle 91 (the area marked with hatching in FIG. 7 ) is included in the area in the side wall 70 b of the inner case 70 including the protruding portion 73 . Thereby, the possibility that the injection path 71 of the heat insulating material on the back side of the heat insulating box 50 (that is, the side close to the injection nozzle 91 ) exists as an obstacle to the flow of the heat insulating material can be reduced.

In addition, although the 2nd shelf support part 21b may contain the extension part 73, it may be formed in the shape which the extension part 73 protrudes from the 2nd shelf support part 21b. In this case, as shown in FIG. 7, it is preferable that the extension part 73 is made into the shape which protrudes below the 2nd shelf support part 21b. Thereby, since the protrusion part of the extension part 73 is not formed in the upper surface of the 2nd shelf support part 21b, a shelf can be slidably mounted on the 2nd shelf support part 21b. Moreover, since it is difficult for a user to see the extension part 73 which protrudes below the 2nd shelf support part 21b by a shelf, the appearance in the refrigerator compartment 11 can be improved.

As shown in FIG. 8 , the projecting portion 83 that is a part of the container holding portion 23 overlaps with the arrangement position of the injection nozzle 91 inserted into the injection port 58 when viewed from the back (or when viewed from the front). In addition, since the arrangement position of the injection port 58 into which the injection nozzle 91 is inserted includes the arrangement position of the injection nozzle 91 , the arrangement position of the injection port 58 also overlaps with the extension portion 83 .

Furthermore, it is preferable that the disposition area of the injection nozzle 91 (the area marked with hatching in FIG. 8 ) is included in the area in the side wall 70 b of the inner case 70 including the protruding portion 83 . Thereby, the possibility that the injection path 81 of the heat insulating material on the back side of the heat insulating box 50 (that is, the side close to the injection nozzle 91 ) exists as an obstacle to the flow of the heat insulating material can be reduced.

In addition, the container holding part 23 may include the extension part 83 , but may be formed in a shape in which the extension part 83 protrudes from the container holding part 23 . In this case, it is preferable that the extension part 83 has a shape which protrudes below the container holding part 23 . Thereby, since the protruding part of the extension part 83 is not formed in the upper surface of the container holding part 23, a container can be mounted on the container holding part 23 slidably. In addition, since it is difficult for the user to see the protruding portion 83 extending below the container holding portion 23 using the container, the appearance in the freezer compartment 13 can be improved.

(About the dimensions of the overhang) Next, the relationship between the thickness of the side surface portion of the heat insulating box 50 , the dimensions of the protruding portions 73 and 83 , and the diameter of the injection nozzle 91 will be described with reference to FIG. 9 .

As described above, the method of manufacturing the heat insulation box 50 includes attaching the injection nozzle 91 for discharging the heat insulating material to the injection port 58 provided in the back surface portion 60 c of the heat insulation box 50 , and injecting the heat insulation box 50 from the injection nozzle 91 to the injection nozzle 91 . The process of injecting heat insulating material inside.

Here, let the inner diameter of the injection nozzle inserted into the injection port 58 be Φ1. Φ1 is set to, for example, 12 mm or more and 30 mm or less (specifically, 18 mm). The opening diameter Φ2 of the injection port 58 is designed to be slightly larger than the inner diameter (Φ1 ) of the injection nozzle 91 . For example, the opening diameter Φ2 of the injection port 58 is designed to be approximately 5 to 20 mm larger than the inner diameter Φ1 of the injection nozzle.

In addition, let the thickness of the inside of the side surface part of the heat insulation box 50 be T1. In addition, the thickness of the inside of the side portion referred to here refers to the thickness of the rear end portion of the side portion of the portion where the overhang portion 73 (or the overhang portion 83 ) and the like are not provided (for example, the position of the rear wall 70c of the inner box 70 ). , or the thickness of the side surface of the front end of the inclined surface portion 72). T1 is set to, for example, 25 mm or more and 35 mm or less.

In addition, let the thickness of the vacuum heat insulating material 51 attached to the outer case side inside the heat insulating box 50 be T2. T2 is set to, for example, 10 mm or more and 20 mm or less (specifically, 15 mm).

In the present embodiment, in order to reduce the thickness of the side surface of the heat insulation box 50, with respect to the inner diameter Φ1 of the injection nozzle 91, the inner space of the side surface of the heat insulation box 50 (from the heat insulation box 50 The thickness (ie, T1 - T2 ) of the side surface (excluding the portion where the vacuum heat insulating material 51 is arranged) is reduced.

That is, when the dimensions of the heat insulation box 50 and the injection nozzle 91 are designed as described above, the following relational expressions are established. (T2+Φ1)>T1

When injecting the heat insulating material into the heat insulating box 50 having such a size, as shown in FIG. 9 , it is preferable that the arrangement position of the vacuum heat insulating material 51 and the installation position of the injection nozzle 91 do not overlap when viewed from the back (or when viewed from the front). . Thereby, the heat insulating material discharged from the injection nozzle 91 can be prevented from directly contacting the end of the vacuum heat insulating material 51 .

Furthermore, the injection nozzle 91 is attached to the position which overlaps the extension part 73 (or the extension part 83) provided in the side wall 70b of the inner case 70 when it sees from the back side (refer FIG. 7 and FIG. 8). Thereby, a relatively large space can be secured as the injection path 71 (or injection path 81 ) of the heat insulating material in the side surface portion of the heat insulating box 50 having a thin thickness. Therefore, when the heat insulating material is injected into the heat insulating box 50, the heat insulating material can be made to flow more easily in the heat insulating box.

In addition, when the projecting dimension of the projecting portion 73 (or the projecting portion 83 ) is W, Then, it is preferably (T1+W)>(T2+Φ1).

The size of the protruding dimension W can be appropriately set according to the diameter Φ1 of the injection nozzle 91 , the thickness T1 of the side surface portion of the heat insulating box 50 , and the like. W is set to, for example, 1 mm or more and 20 mm or less.

By setting the projection dimension W as described above, a large space can be secured as the injection path 71 (or injection path 81 ) of the heat insulating material.

In addition, as shown in FIGS. 5 and 9 , the extension portion 73 (or the extension portion 83 ) does not need to extend to the front end of the heat insulation box 50 , but may, for example, extend beyond the second shelf support portion 21 b , The front end of the container holding portion 23 is positioned at the rear. At this time, as shown in FIG. 9 , the front end of the extension portion 73 (or the extension portion 83 ) is preferably an inclined surface inclined toward the inside of the heat insulation box 50 . Thereby, the protruding portion 73 (or the protruding portion 83 ) can be prevented from being noticed by the user, and the appearance can be improved. In addition, by forming the inclined surface inclined toward the inside of the heat insulating box 50 , it is possible to suppress the heat insulating material flowing to the extension portion 73 (or the extension portion 83 ) from remaining in the extension portion 73 (or the extension portion 83 ). front end.

(Summary of the first embodiment) As described above, the refrigerator 1 according to the present embodiment includes the heat insulating box 50 . The heat insulating box 50 has an inner box 70 and an outer box 60 . A vacuum heat insulating material 51 is arranged on the outer case side in the heat insulating case 50 . At least one injection port 58 into which the material of the foamed heat insulating material is injected is provided on the back surface of the heat insulating box 50 . The inner box 70 has a back wall 70c and a side wall 70b on which at least one protrusions 73 and 83 partially bulged inward of the box are provided. The protruding portions 73 and 83 are provided at positions overlapping the injection port 58 when viewed from the back.

According to the above-mentioned configuration, the arrangement area of the injection nozzle 91 attached to the injection port 58 (the area marked with hatching in FIG. 7 or FIG. 8 ) can be included in the side wall 70 b of the inner box 70 including the protruding portion 73 or 83 . the structure of the area within. Thereby, the location which becomes the flow obstruction of a heat insulating material can be reduced in the injection path 71 or 81 of the heat insulating material on the back side of the heat insulating box 50 (that is, the side close to the injection nozzle 91).

As mentioned above, according to the heat insulation box 50 of this embodiment, when injecting a foam heat insulation material, it can be set as the structure which can make a foam heat insulation material flow more easily in a heat insulation box. Thereby, the thickness reduction of the side part of the heat insulation box 50 can be achieved, and the possibility that the part which is not filled with the foam heat insulating material in the inside of the heat insulation box 50 can be reduced.

<Second Embodiment> Next, a second embodiment of the present invention will be explained. FIG. 10 shows the configuration of the side surface of the heat insulating box 50 included in the refrigerator 1 according to the second embodiment. Hereinafter, the configuration different from that of the first embodiment will be mainly described.

As shown in FIG. 10, the side surface part of the heat insulation box 50 is provided with the direction control part 175 which controls the inflow direction of a heat insulating material. The direction control portion 175 is arranged at a portion extending the extension portion 73 in the forward direction. In this embodiment, the direction control part 175 is arrange|positioned inside the side wall 70b of the inner box 70 (the side in which the heat insulating material is provided). Thereby, the space in the heat insulation box 50 becomes narrow in the part where the direction control part 175 is arrange|positioned.

FIG. 11 schematically shows a state in which a heat insulating material is injected into the heat insulating box 50 according to the present embodiment. 11 shows a state in which the injection nozzle 91 is attached to the injection port 58 on the upper side of the heat insulation box 50, and the inflow direction of the heat insulating material discharged from the injection nozzle 91 is indicated by an arrow.

The direction control portion 175 is formed of a triangular prism-shaped object having a substantially triangular shape in a side view. The direction control portion 175 can be formed of, for example, foamed styrene or the like. As shown in FIG. 11 , the apex portion of the triangular-shaped direction control portion 175 is located at a position where the extension portion 73 is extended in the forward direction.

By providing such a direction control part 175, as shown by the arrow of a broken line in FIG. 11, the inflow direction of a heat insulating material is changed. That is, the heat insulating material discharged from the injection nozzle 91 flows to the front side (opening part 50 a ) through the extension part 73 provided on the side surface of the heat insulating box 50 , and then reaches the installation position of the direction control part 175 .

Here, the direction control portion 175 becomes a branch point of the flow of the heat insulating material, and the heat insulating material flows in the direction of arrow A and the direction of arrow B separately. For example, in the case of the direction control portion 175 having the shape shown in FIG. 11 , more heat insulating material may flow in the direction of the arrow A. As shown in FIG.

As described above, the heat insulation box 50 according to the present embodiment is provided with the direction control section 175 . Thereby, the flow and flow rate of the heat insulating material flowing into the opening 50a side of the heat insulating box 50 can be appropriately changed, for example, more heat insulating materials can be made to flow through a predetermined portion in the heat insulating box 50 .

Moreover, the extension part 83 corresponding to the lower injection port 58 is extended to the vicinity of the opening part 50a of the heat insulation box 50 according to the shape of the container holding part 23. Therefore, no direction control portion is provided on the front side of the overhang portion 83 . However, in other embodiments, the direction control portion may be provided on the front side of the overhang portion 83 corresponding to the lower injection port 58 .

In the refrigerator 1 according to the present embodiment, the configuration other than the direction control portion 175 can be applied to the same configuration as that of the first embodiment.

<Third Embodiment> Next, a third embodiment of the present invention will be described. In the third embodiment, the configuration of the direction control unit that controls the inflow direction of the heat insulating material is different from that of the second embodiment. For the configuration other than this, the same configuration as that of the second embodiment can be applied. Therefore, in the third embodiment, the difference from the second embodiment will be mainly described.

FIG. 12 schematically shows a state in which a heat insulating material is injected into the heat insulating box 50 of the refrigerator 1 according to the third embodiment. 12 shows a state where the injection nozzle 91 is attached to the injection port 58 on the upper side of the heat insulation box 50, and the inflow direction of the heat insulating material discharged from the injection nozzle 91 is indicated by an arrow.

As shown in FIG. 12, the side surface part of the heat insulation box 50 is provided with the direction control part 275 which controls the inflow direction of a heat insulating material. The direction control portion 275 is arranged at a portion extending the extension portion 73 in the forward direction. In the present embodiment, the direction control portion 275 is formed to be further expanded toward the opening side of the extension portion 73 . That is, the direction control part 275 is formed in the shape which protrudes toward the box inner side similarly to the extension part 73. FIG.

By providing such a direction control part 275, as shown by the arrow of a broken line in FIG. 12, the inflow direction of a heat insulating material is changed. That is, the heat insulating material discharged from the injection nozzle 91 flows to the front side through the extension portion 73 provided in the side surface portion of the heat insulating box 50 , and then reaches the direction control portion 275 . Then, it flows so as to expand in the direction of arrow B along the shape of the direction control portion 275 . Thereby, more heat insulating material can be made to flow in the direction of arrow B.

Also in this embodiment, it is preferable to form so that the upper surface of the extension part 73 may become level similarly to 1st Embodiment. Even in this case, the shelf or the like can be slidably placed on the upper surface of the extension portion 73 . In addition, it may be formed so that the front end of the extension part 73 may become a slightly upward inclined surface. Thereby, the heat insulating material flowing in the direction of the arrow A can be made to flow into the upper side. Moreover, by forming this upward inclined surface, it can function as a stopper, and can prevent the shelf board mounted on the upper surface of the extension part 73 from sliding forward inadvertently.

As described above, the heat insulation box 50 according to the present embodiment is provided with the direction control portion 275 . Thereby, the flow and flow rate of the heat insulating material flowing into the opening 50a side of the heat insulating box 50 can be appropriately changed, for example, more heat insulating materials can be made to flow through a predetermined portion in the heat insulating box 50 .

In addition, the direction control part 275 similar to the above may be provided in the protruding part 83 corresponding to the lower injection port 58 .

(Summarize) A heat insulating box (eg, heat insulating box 50 ) according to one aspect of the present invention has an inner box (eg, inner box 70 ) and an outer box (eg, outer box 60 ). This heat insulating box includes a vacuum heat insulating material (for example, a vacuum heat insulating material 51 ) disposed on the outer box side of the heat insulating box body, and a foam heat insulating material (for example, a vacuum heat insulating material 51 ) filled in the heat insulating box body foam insulation 56). At least one injection port (eg, injection port 58 ) into which the material of the foamed heat insulating material is injected is provided on the rear surface (eg, the rear surface portion 60 c ) of the heat insulating box. The inner box has a back surface (for example, back wall 70c) and a side surface (for example, side wall 70b), and at least one protrusion (for example, protrusions 73, 83) partially raised toward the inside of the box is provided on the side surface. ). And the said extension part is arrange|positioned at the position which overlaps with the said injection port, when it sees from the back.

In the heat insulating box (eg, the heat insulating box 50 ) according to one aspect of the present invention described above, the inner box (eg, the inner box 70 ) is formed between the back surface portion (for example, the back surface wall 70 c ) and the side surface portion ( For example, the boundary portion of the side wall 70b) further has an inclined surface portion (for example, the inclined surface portion 72), and the protruding portions (for example, the protruding portions 73 and 83) may be provided continuously with the inclined surface portion.

In the heat insulation box (for example, the heat insulation box 50 ) according to one aspect of the present invention described above, the protrusion dimension (for example, the protrusion dimension W) of the protrusions (for example, the protrusion parts 73 and 83 ) ) may be 1 mm or more and 20 mm or less.

In the heat insulation box (for example, the heat insulation box 50 ) according to one aspect of the present invention described above, the overhangs (for example, the overhangs 73 and 83 ) may be arranged in pairs in the heat insulation box. A part of the support part (for example, the 2nd shelf support part 21b, the container holding part 23) which supports at least any one of the storage container and the shelf in the box of a body.

In the heat insulation box (for example, the heat insulation box 50 ) according to the one aspect of the present invention described above, the projecting portion (for example, the projecting portion) may be placed on the side surface of the heat insulating box. 73, 83) A direction control part (for example, direction control part 175, 275) which controls the inflow direction of the material of the said foam heat insulating material is provided in the part extended in the front direction.

Additionally, another aspect of the present invention relates to a refrigerator (eg, refrigerator 1). This refrigerator has the heat insulation box (for example, the heat insulation box 50) which concerns on one aspect of this invention.

Moreover, another aspect of this invention relates to the manufacturing method of a heat insulating box. This manufacturing method includes a step of placing a back surface (for example, back surface 60c) on a heat insulating box (for example, heat insulation box 50) provided with an outer case (for example, outer case 60) and an inner case (for example, inner case 70). ) of the injection port (eg, the injection port 58 ) is attached to an injection nozzle (eg, injection nozzle 91 ) for discharging the material of the foamed heat insulating material, and the material is injected into the inside of the heat insulating box from the injection nozzle. In this manufacturing method, if the thickness of the inside of the side portion of the heat insulating box is T1, the vacuum barrier provided inside the side portion of the heat insulating box on the side of the outer box The thickness of the thermal material (for example, the vacuum heat insulating material 51 ) is set to T2, and the inner diameter of the injection nozzle inserted into the injection port provided in the back surface of the heat insulation box is set to Φ1, then (T2+Φ1)>T1. And the said injection nozzle is attached in the position which overlaps the extension part (for example, extension part 73, 83) provided so that the side surface part of the said inner case may partially bulge toward the inside of the case when viewed from the back.

In the manufacturing method of the heat insulating box according to the one aspect of the present invention described above, if the protrusion dimension of the protrusions (for example, the protrusions 73 and 83 ) is W, the (T1+W)>(T2+Φ1).

It should be understood that the embodiments disclosed this time are illustrative and non-restrictive in every respect. The scope of the present invention is shown by the scope of the claims, not by the above-mentioned description, and includes the meaning equivalent to the claims and all modifications within the scope. 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: The first refrigerator compartment 11a: Refrigerator door 12: Second refrigerator compartment 12a: Refrigerator door 13: Freezer 13a: Freezer door 21a: First shelf support part 21b: Second shelf support 21c: Third shelf support 23: Storage container holding part 30: Equipment room 31: Compressor 32: Cooler 50: heat insulation box 51: Vacuum Insulation Materials 56: Foam insulation material 58: Injection port 59: Divider 60: Outer box 60a: upper face 60b: side part 60c: back side 70: Inner box 70a: Upper wall 70b: Side Wall 70d: Bottom wall 73: Extension 83: Extension 91: Injection nozzle

FIG. 1 is a schematic cross-sectional view showing an internal structure of a refrigerator according to an embodiment of the present invention. Fig. 2 is a plan view showing the configuration in the box of the heat insulating box of the refrigerator according to the first embodiment. Fig. 3 is a perspective view showing a state in which a heat insulating material is injected into the heat insulating box shown in Fig. 2 . Fig. 4 is a plan view showing a configuration of a side surface portion inside the box of the heat insulating box shown in Fig. 2 . Fig. 5 is a partial cross-sectional view showing the configuration of the portion along the line A-A of the heat insulating box shown in Fig. 4 . Fig. 6 is a partial cross-sectional view showing the configuration of the portion along the line B-B of the heat insulating box shown in Fig. 4 . Fig. 7 is an enlarged view showing a portion of a broken-line frame indicated by C in the inner box of the heat insulating box shown in Fig. 6 . Fig. 8 is an enlarged view showing a portion of a broken-line frame indicated by D in the inner box of the heat insulating box shown in Fig. 6 . 9 is a schematic diagram for explaining the relationship between the diameter of the injection nozzle and the size of each part of the heat insulation box. Fig. 10 is a plan view showing the configuration of the side surface portion of the heat insulating box of the refrigerator according to the second embodiment. FIG. 11 is a schematic view showing a state in which a heat insulating material is injected into the heat insulating box shown in FIG. 10 . Fig. 12 is a schematic diagram showing a state in which a heat insulating material is injected into the heat insulating box in the refrigerator according to the third embodiment.

21a: First shelf support part

21b: Second shelf support

21c: Third shelf support

23: Storage container holding part

70: Inner box

70a: Upper wall

70b: Side Wall

70d: Bottom wall

73: Extension

83: Extension

91: Injection nozzle

Claims (8)

A thermal insulation box has an inner box and an outer box, the improvement is that the thermal insulation box has: a vacuum heat insulating material disposed on the outer box side of the heat insulating box body; and foam insulation material, which is filled in the insulation box; At least one injection port for injecting the material of the foamed thermal insulation material is provided on the back of the thermal insulation box, The inner box has a back surface portion and a side surface portion, and the side surface portion is provided with at least one protruding portion partially raised toward the inner side of the box, The said extension part is arrange|positioned at the position which overlaps with the said injection port when it sees from the back. The heat insulating box according to claim 1, wherein the inner box further has an inclined surface portion at a boundary between the back surface portion and the side surface portion, The protruding portion is provided continuously with the inclined surface portion. The heat insulating box according to claim 1 or 2, wherein the protrusion dimension of the protrusion is 1 mm or more and 20 mm or less. The heat insulating box according to any one of Claims 1 to 3, wherein the overhanging portion is configured to carry out at least any one of a storage container and a shelf arranged in a box of the heat insulating box. A part of the support part of the support. The heat insulation box according to any one of claims 1 to 4, wherein a control station is provided at a portion of the side surface portion of the heat insulation box that extends the protruding portion in the forward direction. The direction control part of the inflow direction of the material of the foam heat insulating material. A refrigerator is improved by having the heat insulating box according to any one of claims 1-5. A method for manufacturing a heat insulating box, the improvement comprising the steps of: attaching an injection nozzle for discharging a material of a foamed heat insulating material to an injection port provided on a back surface of a heat insulating box having an outer case and an inner case, The step of injecting the material into the heat insulating box from the injection nozzle, Assuming that the thickness of the inside of the side surface of the heat insulating box is T1, Let the thickness of the vacuum heat insulating material provided on the outer box side inside the side surface portion of the heat insulating box be T2, Assuming that the inner diameter of the injection nozzle inserted into the injection port provided on the rear surface of the heat insulation box is Φ1, then (T2+Φ1)>T1, The said injection nozzle is attached in the position which overlaps with the protrusion part provided so that the side part of the said inner case may bulge toward the tank inner side part, when it sees from the back. The method for manufacturing a heat insulating box according to claim 7, wherein, if the overhang dimension of the overhang portion is W, then (T1+W)>(T2+Φ1).

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