JP6683246B2 - Refrigerator and manufacturing method thereof - Google Patents

Description

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

  In recent years, from the viewpoint of global environment protection such as prevention of global warming, energy saving has been required also in refrigerators. On the other hand, in the market, there is an increasing need for a refrigerator with a large volume and a high volume efficiency in the same installation space. Therefore, as a heat insulating material used in a refrigerator, a vacuum heat insulating material that can enhance the heat insulating performance and can make the heat insulating layer thinner has been used.

  By the way, generally, a vacuum heat insulating material used in a refrigerator is adhered and fixed to an inner box or an outer box by applying a rubber hot melt to the entire bonding surface. As a method of applying the rubber-based hot melt to the entire surface of the vacuum heat insulating material, there is known a method of transferring the hot melt by passing a plate-shaped vacuum heat insulating material through a roll like the heat insulating casing disclosed in Patent Document 1. Has been. The vacuum heat insulating material having a bent three-dimensional shape cannot be passed through a roll. Therefore, for example, as in the refrigerator disclosed in Patent Document 2, a sheet material with a double-sided adhesive is attached and bonded.

JP, 2007-155279, A JP, 2009-228917, A

  In styrene rubber-based hot melt bonding as in Patent Document 1, the viscosity of the styrene rubber-based hot melt decreases due to heating of the heat-insulated housing until the heat-insulated housing is filled with the rigid urethane foam insulation and the foaming process. Due to a factor, the vacuum heat insulating material disposed on the bottom surface of the inner box may peel off from the inner box and fall.

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

A refrigerator according to the present invention includes an outer box, an inner box that is housed in the outer box and forms an inner space between the outer box and the inner box, and is bonded to a bottom wall of the inner box. The L-shaped vacuum heat insulating material, the foam heat insulating material provided in the internal space, and the L-shaped vacuum in the stress concentration region generated in the surface contact portion of the vacuum heat insulating material with the inner box. An adhesive that is provided linearly only along the direction in which the bent portion of the heat insulating material extends and that prevents the vacuum heat insulating material from peeling off and falling due to gravity.

  In the refrigerator and the manufacturing method thereof according to the present invention, since the adhesive is provided in the stress concentration region of the L-shaped vacuum heat insulating material in a linear shape, a dot shape, or a wavy shape, the vacuum heat insulating material is firmly attached to the inner box. The vacuum heat insulating material is prevented from peeling off from the inner box and dropping until the process of filling and foaming 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 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. FIG. 6 is a stress distribution diagram loaded on the adhesive in FIG. (A) is a front view of a vacuum heat insulating material provided with a linear styrene rubber-based 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.
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. 1 is a cross-sectional view of a refrigerator according to Embodiment 1 of the present invention as seen from a side direction. FIG. 2 is an explanatory diagram showing an assembling process of the refrigerator according to the first embodiment of the present invention.

  The refrigerator 4 is divided into a refrigerating compartment 11, an ice making compartment and a switching compartment 12, a freezing compartment 13, and a vegetable compartment 14 by a first partition 8, a second partition 9, and a third partition 10. . In the refrigerator 4, a refrigerating compartment 11 is formed at the uppermost portion, and an ice making compartment and a switching compartment 12, a freezing compartment 13, and a storage compartment having a lowermost portion as a vegetable compartment 14 are formed in order from the top. Specifically, the refrigerating chamber 11 is sectioned above the first partition wall 8 and is maintained at a refrigerating temperature (about + 5 ° C.). The ice making chamber and the switching chamber 12 are divided into a space formed by the lower portion of the first partition wall 8 and the upper portion of the second partition wall 9, and the freezing temperature (about -20 ° C) in the ice making chamber and the supercooling temperature (in the switching chamber) ( -7 to 0 ° C). The freezing chamber 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 sectioned below the third partition 10 and is maintained at a refrigerating temperature (about + 5 ° C.). However, the first partition wall 8, the second partition wall 9, and the third partition wall 10 may not be provided as long as there is no temperature difference between the rooms. Further, the order and structure of the refrigerating room 11, the ice making room and the switching room 12, the freezing room 13 and the vegetable room 14 are not limited to the illustrated embodiment, but may be implemented in various variations.

  As shown in FIG. 1, the refrigerator 4 includes an outer box 5 formed by bending a metal such as an iron plate into a U shape to form the ceiling and both side surfaces of the refrigerator 4, and a synthetic resin such as ABS. The main body is configured with an inner box 6 that is inserted and forms an internal space between the inner box 6 and the outer box. Vacuum heat insulating materials 20, 21, and 23 are arranged in the inner spaces of the outer box 5 and the inner box 6 on the top, back, and bottom of the refrigerator 4, respectively, and a hard urethane foam heat insulating material is provided in the surrounding space. 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 stepwise 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 arranged. Further, at the rear of the freezing compartment 13, a cooler 17 is provided for cooling each of the refrigerating compartment 11, the ice making and switching compartment 12, the freezing compartment 13 and the vegetable compartment 14 to a predetermined temperature zone. The cooler 17, the compressor 16, and the condenser 18 are connected by a pipe to construct a refrigeration cycle.

  FIG. 3 is an explanatory diagram showing an outline of the manufacturing process of the vacuum heat insulating material of the refrigerator according to the first embodiment 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 outer covering material 2 made of a gas barrier film, and then the inside of the outer covering material 2 is evacuated. It is a composition. The vacuum heat insulating materials 20 and 23 arranged on the bottom surface and the top surface of the inner box 6 of the refrigerator 4 are formed by bending the plate-like vacuum heat insulating material 1 shown in FIG. 3 into an L shape.

  Here, the vacuum heat insulating materials 20 and 23 arranged 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 rear surface of the ceiling. The electronic control board 19 is a self-heating component. Therefore, it is preferable to dispose the vacuum heat insulating material 20 having a higher heat insulating effect than urethane between the inner box 6 and the electronic control board 19. Further, since the refrigerator 4 has a radiation pipe (not shown) arranged on the ceiling, it is preferable to also arrange the vacuum heat insulating material 20 between the radiation pipe and the inner box 6. Therefore, the vacuum heat insulating material 20 arranged on the top surface of the refrigerator 4 has a shape in which the plate-like vacuum heat insulating material 1 is bent into an L shape, and is applied to the outer box 5 by applying styrene rubber hot melt. The roof of the refrigerator 4 and the electronic control board 19 are simultaneously covered. That is, the vacuum heat insulating material 20 can reduce the manufacturing cost by forming the L shape. The L-shaped vacuum heat insulating material 20 is not limited to the bent shape of the bent portion, and may be, for example, a curved shape.

  Further, in the refrigerator 4, the compressor 16 and the condenser 18 arranged 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, and for the same reason as in the case of the electronic control board 19, the vacuum heat insulating material 23 may be arranged between the inner box 6 and the machine room 15. preferable. Therefore, the vacuum heat insulating material 23 disposed on the floor surface of the refrigerator 4 is formed by bending the plate-like vacuum heat insulating material 1 into an L shape so as to cover the floor surface of the refrigerator 4 and the machine room 15. A rubber hot melt is applied and adhered to the inner box 6. In addition, the bent portion of the L-shaped vacuum heat insulating material 20 may be formed in a curved shape, for example.

  The vacuum heat insulating material 21 provided on the back surface of the refrigerator 4 is adhered to the back metal part 22 by applying 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, after covering the floor surface of the refrigerator 4 with the floor surface metal parts 24, the housing is erected and the refrigerator 4 is installed. Screw the flange. 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, which 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 stress distribution diagram applied to the adhesive when surface-bonded to the adhesive. In FIG. 4C, the horizontal axis represents the position of the adhesive surface and the vertical axis represents 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 with each other is highest at the L-shaped bending start position (σ _max ), and thereafter. It gradually decreases. The stress concentration area Y, FIG. 4 (B) as shown in, the maximum stress (sigma _max) in the entire region, multiplied by the predetermined value a obtained by experiment or calculation, etc. Stress (a · σ _max) Indicates 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 contacting the inner box 6, and the length B of the bent portion. For example, in 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. 4 (A). . Specifically, assuming that 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 hot melt 30 in a region of 280 mm to 400 mm from the end surface 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, the stress concentration region Y may be 128 mm or more, and the adhesive may be applied considering that the dimension B is 150 mm or more.

  The heat resistance temperature of the inner box 6 made of synthetic resin such as ABS is 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 directly applied to the inner box 6. Therefore, when adhering the inner box 6 and the vacuum heat insulating material 23, styrene rubber hot melt is applied to the surface of the vacuum heat insulating material 23 and cooled to 60 ° C. or lower which is a heat resistant temperature range of synthetic resin such as ABS. Need to do from. After cooling, the styrene rubber hot melt has a reduced viscosity and a low adhesive strength. Moreover, for example, in the case of the vacuum heat insulating material 23 formed in an L shape, since the load on the adhesive is not uniform, there is a problem that the vacuum heat insulating material is peeled from the arrangement position and falls from the inner box 6.

  Further, the styrene rubber-based hot melt is an inexpensive material as compared with the double-sided adhesive tape, and thus is suitable for bonding the vacuum heat insulating materials 20, 21, and 23. For example, when bonding a vacuum heat insulating material that has been subjected to bending with a styrene rubber hot melt, a method is known in which linearly formed styrene rubber hot melt is applied at equal intervals. On the other hand, when the plate-shaped 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 the plate with the adhesive surface in the manufacturing process. After that, the styrene rubber-based hot melt is applied. However, from the viewpoint of manufacturing cost, it is preferable to apply the coating on 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). Therefore, in the refrigerator 4 of the first embodiment, as shown in FIGS. 5 (A) and 5 (B), a linear styrene rubber hot melt 30 adhesive is applied to the stress concentration region Y of the vacuum heat insulating material 23. A plurality of rows (six rows in the illustrated example) are provided at a predetermined interval to strengthen the adhesive force between the vacuum heat insulating material 23 and the inner box 6.

  The styrene rubber hot melt 30 is a styrene rubber hot melt discharged from the nozzle by moving the hot melt coating nozzle linearly directly above the L-shaped vacuum heat insulating material 23 or moving the vacuum heat insulating material 23 linearly. A linear shape is formed by passing a curtain of the melt 30. The vacuum heat insulating material 23 coated with the linear styrene rubber hot melt 30 is adhered to the floor surface of the inner box 6 moving 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 mounting the compressor 16 is attached. After that, the housing is once erected, the flange of the refrigerator 4 is screwed, and the housing is placed horizontally again. Finally, the back metal part 22 is covered, and the rigid urethane foam heat insulating material 7 is filled and foamed from the urethane inlet 26 to form a heat insulating casing. In this way, the inner box 6 is covered with the outer box 5, the rear metal component 22, and the floor metal component 24 on the periphery.

  Therefore, in the refrigerator 4 according to the first embodiment, the L-shaped vacuum heat insulating material 23 arranged on the bottom surface of the inner box 6 is firmly adhered to the inner box 6, so that the hard urethane foam heat insulation of the heat insulating casing is performed. The vacuum heat insulating material 23 does not peel off from the inner box 6 and fall until the filling and foaming steps of the material 7. Further, since the refrigerator 4 of the first embodiment is configured to be provided only in the stress concentration region Y where the styrene rubber-based hot melt 30 is required, the amount of material used can be reduced and an economic effect can be achieved.

Embodiment 2.
Next, the refrigerator according to the second embodiment will be described with reference to 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). Note that description of the same configuration as the refrigerator of the first embodiment will be appropriately omitted.

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

  In the refrigerator 4 according to the second embodiment, the 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 to enhance the adhesive force between the vacuum heat insulating material 23 and the inner box 6. Therefore, as compared with the linear styrene rubber-based 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. You can That is, since the L-shaped vacuum heat insulating material 23 is firmly adhered to the inner box 6, the L-shaped vacuum heat insulating material 23 should be peeled off from the inner box 6 and dropped until the process of filling and foaming the hard urethane foam heat insulating material 7 of the heat insulating casing. There is no. Further, since the refrigerator 4 according to the second embodiment has a configuration in which it is provided only in the stress concentration region Y where the styrene rubber hot melt 31 is required, the amount of materials used can be reduced and an economic effect can be achieved.

Embodiment 3.
Next, the refrigerator according to the third embodiment will be described with reference to FIG. FIG. 7 (A) is a front view of a vacuum heat insulating material of a refrigerator according to Embodiment 3 of the present invention, and FIG. 7 (B) is a plan view of FIG. 7 (A). Note that description of the same configuration as the refrigerator of the first embodiment will be appropriately omitted.

  The refrigerator 4 according to the third embodiment has a configuration in which a styrene rubber 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 the third embodiment shown in FIG. 7B, as an example, wavy linear styrene rubber-based hot melts 32 are provided in four rows at predetermined intervals. The rest of the configuration is the same as that of the refrigerator of the first embodiment.

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

  In the refrigerator 4 of the third embodiment, the styrene rubber-based hot melt 32 is provided in a wavy line in the stress concentration region Y of the vacuum heat insulating material 23 to strengthen the adhesive force between the vacuum heat insulating material 23 and the inner box 6. 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 adhered to the inner box 6, the L-shaped vacuum heat insulating material 23 should be peeled off from the inner box 6 and dropped until the process of filling and foaming the hard urethane foam heat insulating material 7 of the heat insulating casing. There is no. Further, since the refrigerator 4 according to the third embodiment is configured to be provided only in the stress concentration region Y where the styrene rubber-based hot melt 32 is needed, the amount of materials used can be reduced and an economic effect can be obtained.

Fourth Embodiment
Next, the refrigerator according to the fourth embodiment will be described with reference to FIG. FIG. 8 (A) is a front view of the vacuum heat insulating material of the refrigerator according to Embodiment 4 of the present invention, and FIG. 8 (B) is a plan view of FIG. 8 (A). Note that description of the same configuration as the refrigerator of the first embodiment will be appropriately omitted.

  In the refrigerator 4 of the fourth embodiment, the linear styrene rubber-based hot melt 30 described in the first embodiment is arranged in a plurality of rows in the stress concentration region Y of the L-shaped vacuum heat insulating material 23 at predetermined intervals. The second linear styrene rubber hot melt 33 having a lower coating density than the styrene rubber hot melt 30 provided in the stress concentration region Y in the non-stress concentration region X is further provided. A plurality of rows (three rows in the case of the illustrated example) are provided at predetermined intervals. That is, the refrigerator 4 according to the fourth embodiment has a configuration in which the application density of the styrene rubber-based hot melts 30, 33 on the bonding surface Z of the vacuum heat insulating material 23 is increased. The rest of the configuration is the same as that 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 adhered to the inner box 6 and is not peeled off and dropped from the inner box 6 until the process of filling and foaming the hard urethane foam heat insulating material 7 of the heat insulating casing. Further, since the refrigerator 4 according to the fourth embodiment is configured to be concentratedly provided in the stress concentration region Y where the styrene rubber-based hot melt 30 is required, the amount of material used can be reduced and an economic effect can be obtained.

Embodiment 5.
Next, the refrigerator according to the fifth embodiment will be described with reference to FIG. 9 (A) is a front view of a vacuum heat insulating material of a refrigerator according to Embodiment 5 of the present invention, and FIG. 9 (B) is a plan view of FIG. 9 (A). Note that description of the same configuration as the refrigerator of the first embodiment will be appropriately omitted.

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

In the refrigerator 4 according to the fifth embodiment, the dot-shaped styrene rubber hot melt 31 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and the second dot-shaped styrene rubber hot melt is also provided 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 adhered to the inner box 6 and is not peeled off and dropped from the inner box 6 until the process of filling and foaming the hard urethane foam heat insulating material 7 of the heat insulating casing. Further, since the refrigerator 4 according to the fifth embodiment has a configuration in which the styrene rubber hot melt 31 is concentratedly provided in the stress concentration region Y, which is a place where the styrene rubber hot melt 31 is required, the amount of materials used can be reduced and an economical effect can be achieved.

Sixth Embodiment
Next, the refrigerator according to the sixth embodiment will be described with reference to FIG. FIG. 10 (A) is a front view of a vacuum heat insulating material of a refrigerator according to Embodiment 6 of the present invention, and FIG. 10 (B) is a plan view of FIG. 10 (A). Note that description of the same configuration as the refrigerator of the first embodiment will be appropriately omitted.

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

  In the refrigerator of the sixth embodiment, the wavy styrene rubber hot melt 32 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and the 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 adhered to the inner box 6 and is not peeled off and dropped from the inner box 6 until the process of filling and foaming the hard urethane foam heat insulating material 7 of the heat insulating casing. Further, since the refrigerator 4 according to the sixth embodiment has a configuration in which the styrene rubber-based hot melt 32 is concentratedly provided in the stress concentration region Y where it is required, the amount of material used can be reduced and an economic effect can be obtained.

  Although the present invention has been described above based on the embodiments, the present invention is not limited to the configurations of the above-described embodiments. For example, a linear styrene rubber hot melt 30, a dot-shaped styrene rubber hot melt 31, and a wavy linear styrene rubber hot melt 32 may be combined and provided. Modifications can be made as appropriate within the technical scope. In short, it should be noted that various modifications, applications, and utilization ranges that are required by those skilled in the art are included in the gist (technical range) of the present invention.

  DESCRIPTION OF SYMBOLS 1 vacuum heat insulating material, 2 jacket material, 3 core material, 4 refrigerator, 5 outer box, 6 inner box, 6A bottom wall, 7 rigid urethane foam heat insulating material, 8 first partition wall, 9 second partition wall, 10 third partition wall , 11 refrigerating room, 12 ice making room and switching room, 13 freezing room, 14 vegetable room, 15 machine room, 16 compressor, 17 cooler, 18 condenser, 19 electronic control board, 20, 21, 23 vacuum heat insulating material, 22 back metal parts, 24 floor metal parts, 25 compressor stand, 26 urethane inlet, 30, 33 linear styrene rubber hot melt, 31, 34 dot-shaped styrene rubber hot melt, 32, 35 wavy line Styrene rubber hot melt, X non-stress concentrated area, Y stress concentrated area, Z bonded surface.

Claims (3)

Outer box,
An inner box housed in the outer box and forming an internal space between the outer box and the outer box,
An L-shaped vacuum heat insulating material that is adhered to the bottom wall of the inner box in the internal space;
A foamed heat insulating material provided in the internal space,
The vacuum heat insulating material is linearly provided in a stress concentration region generated in a surface contact portion with the inner box along only a direction in which a bent portion of the L-shaped vacuum heat insulating material extends, and the vacuum heat insulating material is gravitational force. Refrigerator equipped with an adhesive that prevents it from peeling off and falling. Outer box,
An inner box housed in the outer box and forming an internal space between the outer box and the outer box,
An L-shaped vacuum heat insulating material that is adhered to the bottom wall of the inner box in the internal space;
A foamed heat insulating material provided in the internal space,
An adhesive that is provided in a plurality of rows in a linear shape with a predetermined interval in a stress concentration region that occurs in a surface contact portion of the vacuum heat insulating material with the inner box, and that prevents the vacuum heat insulating material from being peeled off and dropped by gravity. ,,
A plurality of rows are provided linearly at a predetermined interval in the non-stress concentrated region on the adhesive surface of the vacuum heat insulating material, and an adhesive having a lower coating density than the adhesive provided in the stress concentrated region is provided,
An interval between the adjacent linear adhesives provided in the stress concentration region is set to be narrower than an interval between the adjacent linear adhesives provided in the non-stress concentration region. Refrigerator. Outer box,
An inner box housed in the outer box and forming an internal space between the outer box and the outer box,
An L-shaped vacuum heat insulating material that is adhered to the bottom wall of the inner box in the internal space;
A method of manufacturing a refrigerator comprising a foamed heat insulating material provided in the internal space,
An adhesive that prevents the vacuum heat insulating material from peeling off and falling due to gravity, in a stress concentration region that occurs in a surface contact portion with the inner box in the vacuum heat insulating material,
Moving the hot melt coating nozzle linearly only along the direction in which the bent portion of the L-shaped vacuum heat insulating material extends, or moving the vacuum heat insulating material linearly along only the direction in which the bent portion extends. Apply it linearly with
The vacuum heat insulating material coated with the adhesive is adhered to the inner box,
A method of manufacturing a refrigerator in which the foam insulation is filled in the internal space.

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