WO2017168571A1

WO2017168571A1 - Refrigerator and manufacturing method for same

Info

Publication number: WO2017168571A1
Application number: PCT/JP2016/060153
Authority: WO
Inventors: 右侑兼松; 俊齋藤
Original assignee: 三菱電機株式会社
Priority date: 2016-03-29
Filing date: 2016-03-29
Publication date: 2017-10-05
Also published as: JP6683246B2; CN207180153U; JPWO2017168571A1

Abstract

Provided is a refrigerator comprising the following: an outer box; an inner box that is housed inside the outer box, an inner space being formed between the inner box and the outer box; an L-shaped vacuum heat-insulating material that is in surface bonding with the inner box inside the inner space; a foam heat-insulating material that is provided inside the inner space; and an adhesive that is provided in a linear, dot, or wavy line shape on a stress concentration region present on a portion of the vacuum heat-insulating material in surface contact with the inner box.

Description

Refrigerator and manufacturing method thereof

The present invention relates to a refrigerator provided with a vacuum heat insulating material and a manufacturing method thereof.

In recent years, from the viewpoint of protecting the global environment such as prevention of global warming, energy saving is also demanded for refrigerators. On the other hand, in the market, there is an increasing need for refrigerators with high volumetric efficiency that have a large capacity for the same installation space. Therefore, as a heat insulating material used for a refrigerator, a vacuum heat insulating material that can enhance the heat insulating performance and can further reduce the thickness of the heat insulating layer is used.

By the way, in general, a vacuum heat insulating material used in a refrigerator is fixed to an inner box or an outer box by applying a rubber-based hot melt to the entire surface of the bonding surface. As a method of applying a rubber hot melt to the entire surface of the vacuum heat insulating material, for example, a method of transferring the hot melt by passing a plate-shaped vacuum heat insulating material through a roll as in the heat insulating casing disclosed in Patent Document 1 is known. It has been. In addition, the vacuum heat insulating material which has the three-dimensional shape which gave the bending process cannot let a roll pass. Then, like the refrigerator disclosed by patent document 2, for example, the sheet | seat material with a double-sided adhesive agent is affixed and it adhere | attaches.

JP 2007-155279 A JP 2009-228917 A

In the adhesion by the styrene rubber hot melt as in Patent Document 1, the viscosity of the styrene rubber hot melt is lowered by the heating of the heat insulating casing until the heat insulation casing is filled with the hard urethane foam heat insulating material and the foaming process. Due to factors, the vacuum heat insulating material disposed on the bottom surface of the inner box may be peeled off from the inner box and fall.

The present invention has been made in order to solve the above-described problems, and the vacuum heat insulating material disposed on the bottom surface of the inner box until the filling and foaming process of the hard urethane foam heat insulating material of the heat insulating casing is included. An object of the present invention is to provide a refrigerator that can be prevented from falling off the box.

The refrigerator according to the present invention includes an outer box, an inner box which is housed in the outer box and forms an internal space with the outer box, and is L bonded to the inner box within the inner space. In a stress concentration region generated in a surface contact portion between the letter-shaped vacuum heat insulating material, the foam heat insulating material provided in the internal space, and the inner box in the vacuum heat insulating material, linear, dotted, or wavy And an adhesive provided on the surface.

In the refrigerator and the manufacturing method thereof according to the present invention, the adhesive is provided in a linear shape, a dot shape, or a wavy shape in the stress concentration region of the L-shaped vacuum heat insulating material. The vacuum heat insulating material is not peeled off from the inner box and dropped until the filling and foaming process of the hard urethane foam heat insulating material of the heat insulating casing.

It is sectional drawing seen from the side surface direction of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which showed the assembly process of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which showed the outline | summary of the manufacturing process of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 1 of this invention. (A) is a front view of the L-shaped vacuum heat insulating material, (B) is a plan view of the L-shaped vacuum heat insulating material, and (C) is a case where the L-shaped vacuum heat insulating material is surface-bonded to the inner box. It is a stress distribution map loaded on the adhesive in FIG. (A) is a front view of a vacuum heat insulating material provided with a linear styrene rubber hot melt, and (B) is a plan view of (A). (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 2 of this invention, (B) is a top view of (A). (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 3 of this invention, (B) is a top view of (A). (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 4 of this invention, (B) is a top view of (A). (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 5 of this invention, (B) is a top view of (A). (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 6 of this invention, (B) is a top view of (A).

Embodiment 1 FIG.
A refrigerator according to Embodiment 1 of the present invention will be described with reference to the drawings. First, an example of the configuration of the refrigerator 4 will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention as viewed from the side. FIG. 2 is an explanatory view showing an assembling process of the refrigerator according to Embodiment 1 of the present invention.

The refrigerator 4 is divided into a refrigerating room 11, an ice making room / switching room 12, a freezing room 13, and a vegetable room 14 by a first partition wall 8, a second partition wall 9, and a third partition wall 10. . In the refrigerator 4, a refrigerator compartment 11 is formed at the top, and an ice making room and switching room 12, a freezer compartment 13, and a storage room having a vegetable compartment 14 at the bottom are formed in order from the top. Specifically, the refrigerator compartment 11 is divided into the upper part of the 1st partition 8, and is maintained at the refrigerator temperature (about +5 degreeC). The ice making chamber and the switching chamber 12 are divided into a space formed by a lower portion of the first partition wall 8 and an upper portion of the second partition wall 9. The ice making chamber has a freezing temperature (about −20 ° C.) and the switching chamber has a supercooling temperature (approximately -7 to 0 ° C). The freezer compartment 13 is divided into a space formed by the lower part of the second partition wall 9 and the third partition wall 10, and is maintained at a freezing temperature (about −20 ° C.). The vegetable compartment 14 is divided into the lower part of the 3rd partition 10, and is maintained at the refrigerator temperature (about +5 degreeC). However, the first partition wall 8, the second partition wall 9, and the third partition wall 10 do not have to be disposed if there is no temperature difference between the rooms. Further, the order and configuration of the refrigerator compartment 11, the ice making compartment and the switching compartment 12, the freezer compartment 13 and the vegetable compartment 14 are not limited to the illustrated embodiment, and are implemented in various variations.

As shown in FIG. 1, the refrigerator 4 is composed of an outer box 5 that forms a ceiling and both side surfaces of a refrigerator 4 by bending a metal such as an iron plate into a U shape, and a synthetic resin such as ABS. The main body is composed of an inner box 6 that is inserted and forms an internal space with the outer box. Vacuum

heat insulating materials

20, 21, and 23 are respectively disposed in the inner space between the outer box 5 and the inner box 6 on the top, back, and bottom of the refrigerator 4, and a hard urethane foam heat insulating material is provided in the surrounding gap. 7 is filled.

As shown in FIG. 1, the inner box 6 has a three-dimensional shape in which the rear portion of the bottom wall 6A rises in a stepped manner, and a machine room 15 is formed on the back surface of the bottom wall 6A. Inside the machine room 15, a compressor 16 and a condenser 18 are disposed. In addition, a cooler 17 is provided at the rear of the freezer compartment 13 to cool the refrigerator compartment 11, the ice making room and switching room 12, the freezer compartment 13, and the vegetable compartment 14 to a predetermined temperature range. The refrigeration cycle is constructed by connecting the cooler 17, the compressor 16, and the condenser 18 with a pipe.

FIG. 3 is an explanatory view showing an outline of the manufacturing process of the vacuum heat insulating material for the refrigerator according to Embodiment 1 of the present invention. As shown in FIG. 3, in the vacuum heat insulating material 1, the core material 3 of the inorganic fiber aggregate is inserted into the inside of the jacket material 2 made of a gas barrier film, and then the inside of the jacket material 2 is evacuated. It is a configuration. The vacuum

heat insulating materials

20 and 23 disposed on the bottom surface and the top surface of the inner box 6 of the refrigerator 4 have a shape obtained by bending the plate-shaped vacuum heat insulating material 1 shown in FIG. 3 into an L shape.

Here, the vacuum

heat insulating materials

20 and 23 disposed on the bottom surface and the top surface of the inner box 6 of the refrigerator 4 are formed in an L shape. As shown in FIG. 1, the refrigerator 4 is provided with an electronic control board 19 for operation control on the back of the ceiling. The electronic control board 19 is a self-heating component. Therefore, it is preferable to arrange a vacuum heat insulating material 20 having a higher heat insulating effect than urethane between the inner box 6 and the electronic control board 19. Moreover, since the refrigerator 4 has a heat radiating pipe (not shown) disposed on the ceiling, it is preferable to dispose the vacuum heat insulating material 20 between the heat radiating pipe and the inner box 6. Therefore, the vacuum heat insulating material 20 disposed on the top surface of the refrigerator 4 is formed by bending the plate-shaped vacuum heat insulating material 1 into an L shape, and is applied to the outer box 5 by applying a styrene rubber hot melt. The ceiling of the refrigerator 4 and the electronic control board 19 are covered at the same time. That is, the manufacturing cost can be reduced by making the vacuum heat insulating material 20 L-shaped. In addition, the L-shaped vacuum heat insulating material 20 is not limited to the shape which bent the bending part, For example, it can also implement as a curved shape.

In the refrigerator 4, the compressor 16 and the condenser 18 disposed in the machine room 15 generate heat during operation. Therefore, it is necessary to prevent heat from entering from the floor of the refrigerator 4. For the same reason as in the case of the electronic control board 19, a vacuum heat insulating material 23 may be disposed between the inner box 6 and the machine room 15. preferable. Then, the vacuum heat insulating material 23 arrange | positioned on the floor surface of the refrigerator 4 is made into the shape which bent the plate-shaped vacuum heat insulating material 1 into the L shape so that the floor surface of the refrigerator 4 and the machine room 15 might be coat | covered, and it is styrene. A rubber hot melt is applied and adhered to the inner box 6. In addition, the bending part of the L-shaped vacuum heat insulating material 20 can also be implemented as a curved shape, for example.

The vacuum heat insulating material 21 disposed on the back surface of the refrigerator 4 is bonded to the back metal component 22 by applying a styrene rubber hot melt.

As shown in FIG. 2, when the vacuum heat insulating material 23 is installed on the floor surface of the inner box 6, the floor surface of the refrigerator 4 is covered with a floor surface metal component 24, and then the casing is raised, Screw the flange etc. At this time, the vacuum heat insulating material 23 installed on the floor surface of the refrigerator 4 has its own weight acting in the vertical direction that is the falling direction.

4A is a front view of the L-shaped vacuum heat insulating material, FIG. 4B is a plan view of the L-shaped vacuum heat insulating material, and FIG. 4C is an inner box of the L-shaped vacuum heat insulating material. FIG. 6 is a distribution diagram of stress applied to an adhesive when surface bonding is performed. In FIG. 4C, the horizontal axis indicates the position of the bonding surface, and the vertical axis indicates the load stress. As shown in FIG. 4C, the load stress of the adhesive when the inner box 6 and the vacuum heat insulating material 20 are in surface contact is highest at the L-shaped bending start position (σ _max ) and thereafter. It gradually decreases. As shown in FIG. 4B, the stress concentration region Y is a stress (a · σ _max ) obtained by multiplying the maximum stress (σ _max ) in the entire region by a predetermined value a obtained by experiment or calculation. It refers to the above stress region. Here, the predetermined value a and the stress concentration region Y are determined by the length L of the vacuum heat insulating material 23, the length A of the portion in contact with the inner box 6, and the length B of the bent portion. For example, on the bonding surface Z between the vacuum heat insulating material 23 and the inner box 6, the stress distribution when the inner box 6 and the vacuum heat insulating material 23 are surface bonded is determined by the A and B dimensions shown in FIG. . Specifically, if the A dimension is 400 mm and the B dimension is 150 mm, the predetermined value a is about 0.28 to 0.32, so the stress concentration region Y is about 112 mm to 128 mm. Therefore, the stress concentration region Y is 112 mm to 128 mm from the bending start position. If the size of the stress concentration region Y is 120 mm, it is effective to provide the styrene rubber-based hot melt 30 in the region of 280 mm to 400 mm from the end face of the vacuum heat insulating material 23. Therefore, since the stress concentration region Y is 128 mm when the predetermined value a is 0.32, it may be 128 mm or more, and the adhesive may be applied assuming that the dimension B is 150 mm or more.

The inner box 6 made of a synthetic resin such as ABS has a heat resistant temperature of about 70 degrees, whereas the styrene rubber hot melt is heated to a high temperature of about 180 degrees at the time of application to increase the viscosity. It is in. Therefore, the styrene rubber hot melt cannot be applied directly to the inner box 6. Therefore, when the inner box 6 and the vacuum heat insulating material 23 are bonded, a styrene rubber-based hot melt is applied to the surface of the vacuum heat insulating material 23 and cooled to 60 ° C. or less which is a heat resistant temperature zone of a synthetic resin such as ABS. It is necessary to do from. The styrene rubber hot melt after cooling has a reduced viscosity and a low adhesive strength. In addition, in the case of the vacuum heat insulating material 23 formed in an L shape, for example, there is a problem that the vacuum heat insulating material is peeled off from the arrangement position and dropped from the inner box 6 because the load on the adhesive is not uniform.

Furthermore, since the styrene rubber hot melt is an inexpensive material compared to the double-sided adhesive tape, it is suitable for bonding the vacuum

heat insulating materials

20, 21, and 23. For example, in the case where a vacuum heat insulating material subjected to bending is bonded with a styrene rubber hot melt, a method of applying a linearly formed styrene rubber hot melt at equal intervals is known. On the other hand, in the case where the plate-like vacuum heat insulating material 1 is bent into an L shape and bonded with the styrene rubber-based hot melt 30, it is difficult to bend it with an adhesive surface in manufacturing, In addition, a styrene rubber hot melt is applied. However, from the viewpoint of manufacturing cost, it is preferable to apply to either the L-shaped bending base surface or the bending rising surface.

FIG. 5 (A) is a front view of a vacuum heat insulating material provided with a linear styrene rubber hot melt, and FIG. 5 (B) is a plan view of (A). Then, in the refrigerator 4 of Embodiment 1, as shown to FIG. 5 (A), (B), the adhesive which consists of a linear styrene rubber-type hot melt 30 in the stress concentration area | region Y of the vacuum heat insulating material 23, A plurality of rows (six rows in the illustrated example) are provided at predetermined intervals to reinforce the adhesive force between the vacuum heat insulating material 23 and the inner box 6.

The styrene rubber hot melt 30 is formed by moving the hot melt coating nozzle in a straight line directly above the L-shaped vacuum heat insulating material 23 or moving the vacuum heat insulating material 23 in a straight line and discharging the nozzle. It is formed into a linear shape by passing the curtain of the melt 30. The vacuum heat insulating material 23 coated with the linear styrene rubber hot melt 30 is bonded to the floor surface of the inner box 6 that moves on the assembly conveyor of the refrigerator 4. Then, the floor surface of the refrigerator 4 is covered with a floor metal component 24 and a compressor stand 25 for installing the compressor 16 is attached. Thereafter, the casing is once stood up, and the flange of the refrigerator 4 is screwed or the like, and is again placed horizontally. Finally, the back metal part 22 is covered and the hard urethane foam heat insulating material 7 is filled and foamed from the urethane inlet 26 to form a heat insulating casing. Thus, the inner box 6 is covered with the outer box 5, the back metal part 22, and the floor metal part 24.

Therefore, in the refrigerator 4 according to the first embodiment, the L-shaped vacuum heat insulating material 23 disposed on the bottom surface of the inner box 6 is firmly bonded to the inner box 6, so that the hard urethane foam heat insulation of the heat insulating casing is provided. The vacuum heat insulating material 23 is not peeled off from the inner box 6 and dropped until the filling and foaming steps of the material 7. Moreover, since the refrigerator 4 of Embodiment 1 is the structure provided only in the stress concentration area | region Y which is a location which requires the styrene rubber-type hot melt 30, it can reduce a material to use and there exists an economical effect.

Embodiment 2. FIG.
Next, the refrigerator of Embodiment 2 is demonstrated based on FIG. FIG. 6 (A) is a front view of the vacuum heat insulating material of the refrigerator according to Embodiment 2 of the present invention, and FIG. 6 (B) is a plan view of FIG. 6 (A). In addition, about the structure same as the refrigerator of Embodiment 1, the description is abbreviate | omitted suitably.

The refrigerator 4 of the second embodiment has a configuration in which a styrene rubber-based hot melt 31 as an adhesive is provided in a dot shape in the stress concentration region Y of the L-shaped vacuum heat insulating material 23. The dot-like styrene rubber hot melt 31 is applied to the vacuum heat insulating material 23 by opening and closing a valve of a hot melt application nozzle. Other configurations are the same as those of the refrigerator of the first embodiment.

In the refrigerator 4 of the second embodiment, a styrene rubber-based hot melt 31 is provided in a dot shape in the stress concentration region Y of the vacuum heat insulating material 23 so that the adhesive force between the vacuum heat insulating material 23 and the inner box 6 is strengthened. Therefore, compared with the linear styrene rubber hot melt 30 described in the first embodiment, the density can be changed two-dimensionally with respect to the load stress, and the adhesive strength can be increased more effectively. Can do. That is, since the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6, the L-shaped vacuum heat insulating material 23 is peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating housing. There is no. Moreover, since the refrigerator 4 of Embodiment 2 is the structure provided only in the stress concentration area | region Y which is a location which requires the styrene rubber type hot melt 31, it can reduce a material to use and there exists an economical effect.

Embodiment 3 FIG.
Next, the refrigerator of Embodiment 3 is demonstrated based on FIG. FIG. 7A is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 3 of the present invention, and FIG. 7B is a plan view of FIG. 7A. In addition, about the structure same as the refrigerator of Embodiment 1, the description is abbreviate | omitted suitably.

The refrigerator 4 of Embodiment 3 has a configuration in which a styrene rubber-based hot melt 32 as an adhesive is provided in a wavy line in the stress concentration region Y of the L-shaped vacuum heat insulating material 23. In Embodiment 3 shown in FIG. 7B, as an example, four rows of wavy styrene rubber-based hot melts 32 are provided at predetermined intervals. Other configurations are the same as those of the refrigerator of the first embodiment.

The wavy styrene rubber hot melt 32 is applied by moving the hot melt application nozzle in a wavy shape immediately above the vacuum heat insulating material 23. Alternatively, the vacuum heat insulating material 23 is moved in a wavy line and applied through a hot melt curtain discharged from a hot melt application nozzle.

In the refrigerator 4 of the third embodiment, the styrene rubber hot melt 32 is provided in a wavy shape in the stress concentration region Y of the vacuum heat insulating material 23 so that the adhesive force between the vacuum heat insulating material 23 and the inner box 6 is enhanced. Therefore, the adhesive strength can be increased regardless of the direction of the load. That is, since the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6, the L-shaped vacuum heat insulating material 23 is peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating housing. There is no. Moreover, since the refrigerator 4 of Embodiment 3 is the structure provided only in the stress concentration area | region Y which is a location which requires the styrene rubber type hot melt 32, it can reduce a material to use and there exists an economical effect.

Embodiment 4 FIG.
Next, the refrigerator of Embodiment 4 is demonstrated based on FIG. FIG. 8A is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 4 of the present invention, and FIG. 8B is a plan view of FIG. 8A. In addition, about the structure same as the refrigerator of Embodiment 1, the description is abbreviate | omitted suitably.

In the refrigerator 4 of the fourth embodiment, the linear styrene rubber-based hot melt 30 described in the first embodiment has a plurality of rows (with a predetermined interval) in the stress concentration region Y of the L-shaped vacuum heat insulating material 23 ( In the case of the illustrated example, a second linear styrene rubber hot melt 33 having a coating density lower than that of the styrene rubber hot melt 30 provided in the stress concentration region Y is provided in the non-stress concentration region X. A plurality of rows (three rows in the illustrated example) are provided at predetermined intervals. That is, the refrigerator 4 of the fourth embodiment has a configuration in which the application density of the styrene rubber hot melts 30 and 33 on the bonding surface Z of the vacuum heat insulating material 23 is increased. Other configurations are the same as those of the refrigerator of the first embodiment.

In the refrigerator 4 of the fourth embodiment, the linear styrene rubber hot melt 30 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and the second linear styrene rubber hot melt is also provided in the non-stress concentration region X. 33 is provided to strengthen the adhesive force. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing. Moreover, since the refrigerator 4 of Embodiment 4 is the structure which concentratedly provided in the stress concentration area | region Y which is a location which requires the styrene rubber-type hot melt 30, it can reduce a material to use and has an economical effect.

Embodiment 5 FIG.
Next, the refrigerator of Embodiment 5 is demonstrated based on FIG. FIG. 9 (A) is a front view of the vacuum heat insulating material for a refrigerator according to Embodiment 5 of the present invention, and FIG. 9 (B) is a plan view of FIG. 9 (A). In addition, about the structure same as the refrigerator of Embodiment 1, the description is abbreviate | omitted suitably.

In the refrigerator 4 of the fifth embodiment, the dot-shaped styrene rubber hot melt 31 described in the second embodiment is provided in the stress concentration region Y of the L-shaped vacuum heat insulating material 23, and further, the non-stress concentration region X A second dot-like styrene rubber hot melt 34 having a lower coating density than the dot-like styrene rubber hot melt 31 provided in the stress concentration region Y is provided. That is, the refrigerator 4 of the fifth embodiment has a configuration in which the application density of the styrene rubber hot melts 31 and 34 on the bonding surface Z of the vacuum heat insulating material 23 is increased. Other configurations are the same as those of the refrigerator 4 of the first embodiment.

The refrigerator 4 according to the fifth embodiment is provided with the dot-like styrene rubber hot melt 31 in the stress concentration region Y of the vacuum heat insulating material 23 and the second dot-like styrene rubber hot melt also in the non-stress concentration region X. 34 is provided to strengthen the adhesive force. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing. Moreover, since the refrigerator 4 of Embodiment 5 is the structure which concentratedly provided in the stress concentration area | region Y which is a location which requires the styrene rubber-type hot melt 31, it can reduce a material to use and there exists an economical effect.

Embodiment 6 FIG.
Next, the refrigerator of Embodiment 6 is demonstrated based on FIG. FIG. 10 (A) is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 6 of the present invention, and FIG. 10 (B) is a plan view of FIG. 10 (A). In addition, about the structure same as the refrigerator of Embodiment 1, the description is abbreviate | omitted suitably.

In the refrigerator 4 of the sixth embodiment, the wavy styrene rubber hot melt 32 described in the third embodiment has a plurality of rows (with a predetermined interval) in the stress concentration region Y of the L-shaped vacuum heat insulating material 23. The second wavy styrene rubber system having a coating density lower than that of the wavy styrene rubber hot melt 32 provided in the stress concentration area Y in the non-stress concentration area X. The hot melt 35 is provided in a plurality of rows (two rows in the illustrated example) at predetermined intervals. That is, the refrigerator 4 of the sixth embodiment has a configuration in which the application density of the styrene rubber hot melts 32 and 35 on the bonding surface Z of the vacuum heat insulating material 23 is increased. Other configurations are the same as those of the refrigerator 4 of the first embodiment.

In the refrigerator of the sixth embodiment, a wavy styrene rubber hot melt 32 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and a second wavy styrene rubber hot melt 35 is provided in the non-stress concentration region X. It is provided to strengthen the adhesive strength. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing. Moreover, since the refrigerator 4 of Embodiment 6 is the structure which concentratedly provided in the stress concentration area | region Y which is a location which requires the styrene rubber type hot melt 32, it can reduce a material to use and there exists an economical effect.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the embodiment described above. For example, the present invention can be carried out in a configuration in which any one of a linear styrene rubber hot melt 30, a dot styrene rubber hot melt 31, and a wavy styrene rubber hot melt 32 is provided. Modifications can be made as appropriate within the scope of the technology. In short, it should be noted that the scope of the present invention also includes the scope of various changes, applications, and uses made by those skilled in the art as needed.

1 vacuum insulation material, 2 jacket material, 3 core material, 4 refrigerator, 5 outer box, 6 inner box, 6A bottom wall, 7 hard urethane foam insulation, 8 first partition, 9 second partition, 10 third partition , 11 Refrigerated room, 12 Ice making room and switching room, 13 Freezer room, 14 Vegetable room, 15 Machine room, 16 Compressor, 17 Cooler, 18 Condenser, 19 Electronic control board, 20, 21, 23 Vacuum insulation material, 22 rear metal parts, 24 floor metal parts, 25 compressor stand, 26 urethane inlet, 30, 33 linear styrene rubber hot melt, 31, 34 dot styrene rubber hot melt, 32, 35 wavy Styrene rubber hot melt, X non-stress concentration region, Y stress concentration region, Z bonding surface.

Claims

An outer box,
An inner box housed in the outer box and forming an internal space with the outer box;
An L-shaped vacuum heat insulating material in the inner space and surface-bonded to the inner box;
A foam insulation provided in the internal space;
The refrigerator provided with the adhesive agent provided in the linear, dot shape, or wavy line shape in the stress concentration area | region which arises in the surface contact part with the said inner box in the said vacuum heat insulating material.
The refrigerator according to claim 1, wherein the adhesive is a styrene rubber hot melt.
The vacuum heat insulating material is
A jacket material made of a gas barrier film;
A core material of an inorganic fiber aggregate inserted into the jacket material,
The refrigerator according to claim 1 or 2, wherein the inside of the jacket material into which the core material is inserted is evacuated.
The adhesive having a lower coating density than the adhesive provided in the stress concentration region is provided in a non-stress concentration region on the bonding surface of the vacuum heat insulating material. Refrigerator.
An outer box,
An inner box housed in the outer box and forming an internal space with the outer box;
An L-shaped vacuum heat insulating material in the inner space and surface-bonded to the inner box;
A method for manufacturing a refrigerator comprising a foaming heat insulating material provided in the internal space,
In a stress concentration region generated in a surface contact portion with the inner box in the vacuum heat insulating material, an adhesive made of styrene rubber-based hot melt is applied in a linear shape, a dot shape, or a wavy shape,
The vacuum heat insulating material applied with the adhesive is bonded to the inner box,
The manufacturing method of the refrigerator which fills the said interior space with a foam heat insulating material.