JP6153840B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that refrigerates or freezes food and beverages, and more particularly to a refrigerator in which a heat insulating box is filled with urethane foam and a vacuum heat insulating material.

As a social effort to prevent global warming, energy conservation is being promoted in various fields in order to control carbon dioxide (CO ₂ ) emissions. For example, even in recent refrigerators that are electrical products, particularly refrigerator-related home appliances, refrigerators with improved heat insulation performance have become mainstream from the viewpoint of reducing power consumption. For that purpose, a structure in which the cool air inside the refrigerator does not escape to the outside of the refrigerator is indispensable.

  A refrigerator is comprised by the heat insulation box which is a refrigerator main body, and the door which opens and closes the front opening part of the storage chamber provided in the heat insulation box. In order to prevent the cold air inside the refrigerator from escaping to the outside of the refrigerator, it is effective to improve the heat insulation performance of the heat insulation box and the heat insulation door. For this reason, the insulation box and insulation door are filled with foam insulation (hereinafter referred to as urethane foam as an example) and a vacuum insulation is placed inside the urethane foam to suppress heat transfer. Yes.

  Since the vacuum heat insulating material has a heat insulating performance of about 10 times that of urethane foam, it is known that the heat insulating performance is greatly improved when the vacuum heat insulating material is disposed inside the urethane foam. The core material used for this vacuum heat insulating material is made of glass as a raw material, and is an aggregate of inorganic fibers obtained by melting glass into a fiber.

  As described above, when a vacuum heat insulating material is used, the heat insulating performance is greatly improved. Therefore, it can be said that it is an extremely effective component when viewed as a refrigerator. Such refrigerators are often disposed of for reasons such as replacement by purchase, but recycling from the viewpoint of the recent global environmental protection is a major demand from society.

  Refrigerator consists of outer box, inner box, heat insulating box made of vacuum heat insulating material, urethane foam, etc., refrigeration cycle parts made up of compressor, condenser, refrigerant pipe etc. for circulating refrigerant, electric wiring, control board And an electrical component made of a power supply board or the like. However, it is often difficult to disassemble the vacuum heat insulating material and the electric wiring because they are buried in the urethane foam.

  For this reason, as a method of dismantling used refrigerators in current home appliance recycling factories, it can be easily removed from the outside, such as doors, shelves and containers in containers, substrates, refrigeration cycle parts such as compressors, etc. After removing the parts in advance, the parts that are buried in the vacuum insulation material, electrical wiring, reinforcement members, etc. are put into a crushing device (shredder) with the heat insulation box consisting of the outer box, the inner box and the heat insulation material. It is crushed and separated into metals, resins, and heat insulating materials.

  However, if the whole heat insulation box is put into a crusher and finely crushed, the core material of the vacuum insulation material, which is an inorganic material, will be mixed into the crushed resin and urethane foam, and recycled resin and urethane foam materials As the value becomes lower.

  Furthermore, in a refrigerator that employs a vacuum heat insulating material having an inorganic fiber aggregate or silica as a core material, it is provided in a device that separates each material that has been separated by crushing in a crushing process during recycling processing. There are also problems such as clogging existing filters.

  For this reason, it is required to take out the vacuum heat insulating material (or its core material) first before putting the heat insulating box into the crushing apparatus. And in order to take out a vacuum heat insulating material from a heat insulation box first, and to eliminate mixing of a vacuum heat insulating material, for example, in Unexamined-Japanese-Patent No. 7-77383 (patent document 1), a vacuum heat insulating material peels from a urethane foam. It describes that an easy structure is adopted to facilitate disassembly.

JP 7-77383 A

  However, the technique described in Patent Document 1 employs a structure in which the vacuum heat insulating material and the urethane foam are not bonded to each other by the release layer, so that the vacuum heat insulating material can be easily removed. There may be a space between the vacuum heat insulating material and the urethane foam due to shrinkage of the foam. In this way, if the vacuum heat insulating material is easily peeled to improve recyclability, a space is generated between the vacuum heat insulating material and the urethane foam, so that the heat insulating performance of the heat insulating box is reduced, or There is a concern that the mechanical strength of the heat insulating box may be reduced and the performance of the refrigerator may be adversely affected such that the box is deformed due to repeated opening and closing of the door.

  Therefore, there is a demand for a configuration that can easily take out the vacuum heat insulating material or its core before putting it into the crushing apparatus and that does not affect various performances of the refrigerator.

  The objective of this invention is providing the novel refrigerator which can take out a vacuum heat insulating material or its core material easily before the crushing process at the time of a recycling process, without having a bad influence on the various performances of a refrigerator.

  A feature of the present invention is that a core material of a vacuum heat insulating material is formed by cutting a part of a wall surface in the vicinity of the heat insulating box body where the vacuum heat insulating material is disposed and turning up the wall surface in the vicinity where the vacuum heat insulating material is disposed. I'm going to take it out.

  According to the present invention, since only a part of the wall surface in the vicinity where the vacuum heat insulating material of the heat insulating box is disposed is cut, the various performances of the refrigerator are not adversely affected. Moreover, the core material of a vacuum heat insulating material can be taken out easily by turning up the wall surface of the vicinity where the vacuum heat insulating material is arrange | positioned.

It is a front view of the refrigerator with which this invention is applied. It is sectional drawing which shows the AA cross section of FIG. It is sectional drawing which shows the structure of a vacuum heat insulating material. It is an external appearance perspective view of the refrigerator which becomes the 1st Embodiment of this invention. It is an external appearance perspective view which shows the state which cut | disconnected the side plate of the outer box shown to Fig.4 (a). It is an external appearance perspective view which shows the state which turned the side plate of the outer case shown in FIG.4 (b). It is a top view of a vacuum heat insulating material It is a figure which shows the shape of the 1st easy tear part formed in the vacuum heat insulating material. It is a figure which shows the shape of the 2nd easy tear part formed in the vacuum heat insulating material. It is a figure which shows the shape of the 3rd easy tear part formed in the vacuum heat insulating material. It is an external appearance perspective view of the refrigerator which becomes the 2nd Embodiment of this invention. It is an external appearance perspective view of the refrigerator which becomes the 3rd Embodiment of this invention. It is sectional drawing which shows the BB cross section of Fig.7 (a). It is an external appearance perspective view which shows the state which cut | disconnected the bottom part of the inner box which becomes the 3rd Embodiment of this invention. It is an external appearance perspective view which shows the state which turned the cut surface of the bottom part of the box shown to Fig.8 (a).

  Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is included in the range.

  First, the structure of a refrigerator to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a front view of a refrigerator to which the present embodiment is applied, and FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a schematic sectional view of the vacuum heat insulating material.

  In FIG. 1, the refrigerator 1 has the refrigerator compartment 2, the ice making room 3a, the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment 5 from the top as shown in FIG. The front opening of each storage room is provided with a door that closes them, and the refrigerator doors 6a and 6b, the ice storage door 7a and the upper freezer compartment door 7b, which rotate around the hinge 10 and the like from above, the lower stage. A freezer compartment door 8 and a vegetable compartment door 9 are provided. Except for the refrigerator compartment doors 6a and 6b, all are drawer type doors. When the user pulls out the doors, the containers constituting the respective storage chambers are drawn out together with the doors.

  As shown in FIG. 2, each of the doors 6 to 9 is provided with a packing 11 for sealing each storage chamber, and is attached to the indoor peripheral edge of each of the doors 6 to 9. Moreover, the partition heat insulation wall 12 is arrange | positioned in order to carry out the partition heat insulation between the refrigerator compartment 2, the ice-making room 3a, and the upper stage freezer compartment 3b. Since the temperature zone is the same between the ice making chamber 3a and the upper freezing chamber 3b and the lower freezing chamber 4, a partition member 13 having a packing 11 receiving surface is provided instead of a partition heat insulating wall for partition heat insulation. A partition heat insulation wall 14 is provided between the lower freezer compartment 4 and the vegetable compartment 5 to insulate the compartment. Basically, partition heat insulation walls are installed in partitions of rooms with different storage temperature zones such as refrigeration and freezing.

  In the heat insulating box 20, storage compartments for the refrigerator compartment 2, the ice making compartment 3a and the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment 5 are formed from above, respectively. Is not particularly limited to this. Further, the refrigerator doors 6a and 6b, the ice making door 7a, the upper freezer compartment door 7b, the lower freezer compartment door 8, and the vegetable compartment door 9 are also particularly limited in terms of opening and closing by rotation, opening and closing by drawer, and the number of divided doors. is not.

  The heat insulation box 20 includes an outer box 21 and an inner box 22, and a heat insulating portion is provided in a space formed by the outer box 21 and the inner box 22 to insulate each storage chamber in the heat insulation box 20 from the outside. ing. Vacuum heat insulating materials 50a, 50b, 50c, 50d are arranged in the space between the outer box 21 and the inner box 22, and a urethane foam 23 such as a hard urethane foam is provided in a space other than the vacuum heat insulating materials 50a, 50b, 50c, 50d. Is filled.

  In addition, a cooler 28 is provided on the back side of the freezer compartment 4 to cool each room such as the refrigerator compartment 2, the freezer compartments 3a and 4 and the vegetable compartment 5 to a predetermined temperature. 28, the compressor 30, the condenser 31, and a capillary tube (not shown) are connected to constitute a refrigeration cycle. Above the cooler 28, a blower 27 that circulates the cool air cooled by the cooler 28 in the refrigerator and maintains a predetermined low temperature is disposed.

  Furthermore, as the heat insulating material that separates the refrigerator compartment 2 and the ice making room 3a and the upper freezer room 3b, the freezer room 4 and the vegetable room 5 of the refrigerator, heat insulating partitions 12 and 14 are arranged, respectively, and the expanded polystyrene 33 and the vacuum heat insulating material 50c are used. It is configured. The heat insulating partitions 12 and 14 may be filled with urethane foam 23 such as rigid urethane foam, and are not particularly limited to the expanded polystyrene 33 and the vacuum heat insulating material 50c.

  In addition, a recessed portion 40 for storing an electrical component 41 such as a substrate for controlling the operation of the refrigerator 1 or a power supply substrate is formed in the rear surface of the top surface of the heat insulation box 20, and covers the electrical component 41. 42 is provided. The height of the cover 42 is arranged so as to be substantially the same height as the top surface of the outer box 21 in consideration of appearance design and securing the internal volume. Although it does not specifically limit, when the height of the cover 42 protrudes from the top | upper surface of an outer box, it is desirable to set it in the range within 10 mm.

  Accordingly, the recess 40 is disposed in a state where only the space for storing the electrical component 41 is recessed on the heat insulating material 23 side, so that the inner volume on the upper side of the refrigerator compartment 2 is necessarily sacrificed in order to ensure the heat insulating thickness. become. If the internal volume is increased, the thickness of the heat insulating material 23 between the concave portion 40 and the inner box 22 must be reduced. Therefore, one vacuum heat insulating material 50a formed in a substantially Z shape in the heat insulating material 23 of the concave portion 40 is provided. Arranged to ensure and enhance insulation performance. The cover 42 is made of a steel plate. The outer box 21 of the heat insulation box 20 includes a top plate 21a, a back plate 21b, a side plate 21c (not shown), and a bottom plate 21d. In addition, since the compressor 30 and the condenser 31 disposed at the lower back of the heat insulation box 20 are components that generate large amounts of heat, a vacuum heat insulating material 50d is disposed on the bottom plate 21d side in order to prevent heat from entering the inside of the cabinet. doing.

  Next, the structure of the vacuum heat insulating material 50 will be described with reference to FIG. The vacuum heat insulating material 50 includes a core material 51, an inner bag 52 for holding the core material 51 in a compressed state, an outer bag 53 having a gas barrier layer covering the core material 51 held in a compressed state by the inner bag 52, And the adsorbent 54.

  The outer bag 53 is arrange | positioned on both surfaces of the vacuum heat insulating material 50, and is comprised by the bag shape which bonded the part of the fixed width | variety from the ridgeline of the laminated film of the same magnitude | size by heat welding. In the present embodiment, for the core material 51, glass wool having an average fiber diameter of 4 μm is used as a laminate of inorganic fibers not bonded or bound with a binder or the like.

  Outgassing is reduced by using a laminate of inorganic fiber material for the core material 51, which is advantageous in terms of heat insulation performance, but is not particularly limited thereto, for example, other than ceramic fiber, rock wool, glass wool, etc. Inorganic fibers such as glass fibers may be used.

  Depending on the type of the core material 51, the inner bag 52 may be unnecessary. Moreover, about the core material 51, an organic resin fiber material other than an inorganic fiber material can be used. In the case of organic resin fibers, there are no particular restrictions on use as long as the heat resistant temperature is cleared.

  Specifically, it is common to fiberize polystyrene, polyethylene terephthalate, polypropylene, etc. to a fiber diameter of about 1 to 30 μm by a melt blown method or a spunbond method, If it is a fiberization method, it will not ask in particular.

  The laminated structure of the outer bag 53 is not particularly limited as long as it has gas barrier properties and can be thermally welded. In this embodiment, the surface protective layer, the first gas barrier layer, the two-gas barrier layer, and the thermal welding are used. The laminate film is composed of four layers. The surface layer is a resin film having a role of a protective material, the first gas barrier layer is provided with a metal vapor deposition layer on the resin film, the second gas barrier layer is provided with a metal vapor deposition layer on a resin film having a high oxygen barrier property, and the first gas barrier layer And the second gas barrier layer are bonded so that the metal vapor deposition layers face each other.

  For the heat-welded layer, a film having low hygroscopicity was used as in the surface layer. Specifically, the surface layer is a biaxially stretched film of polypropylene, polyamide, polyethylene terephthalate, the first gas barrier layer is a biaxially stretched polyethylene terephthalate film with aluminum deposition, and the second gas barrier layer is a two-layered film with aluminum deposition. An axially stretched ethylene vinyl alcohol copolymer resin film, a biaxially stretched polyvinyl alcohol resin film with aluminum deposition, or an aluminum foil was used, and the heat-welded layer was an unstretched polyethylene, polypropylene, or other film.

  The layer structure and material of the four-layer laminate film are not particularly limited to these. For example, as each gas barrier layer, a metal foil or a resin film provided with a gas barrier film such as an inorganic layer compound, a resin gas barrier coating material such as polyacrylic acid, DLC (diamond-like carbon), etc. For example, a polybutylene terephthalate film having a high oxygen barrier property may be used.

  The surface layer is a protective material for the first gas barrier layer, but in order to improve the vacuum exhaust efficiency in the manufacturing process of the vacuum heat insulating material, it is preferable to dispose a resin having a low hygroscopic property. In addition, since the resin-based film other than the metal foil used for the second gas barrier layer deteriorates the gas barrier property due to moisture absorption, the gas barrier property can be obtained by arranging a resin having a low hygroscopic property for the heat-welded layer. This suppresses the moisture absorption of the entire laminate film.

  Thereby, also in the vacuum evacuation process of the vacuum heat insulating material 50 described above, the amount of moisture brought into the outer bag 53 can be reduced, so that the vacuum evacuation efficiency is greatly improved and the performance of the heat insulation performance is improved. In addition, the lamination (bonding) of each film is generally performed by a dry lamination method through a two-component curable urethane adhesive, but the type of adhesive and the bonding method are particularly limited to this. It is not necessary to use any other method such as a wet laminating method or a thermal laminating method.

  In the present embodiment, the inner bag 52 is a polyethylene film that can be heat-welded. After the core material 51 is included, the inner bag 52 is compressed in the thickness direction of the core material 51 and deaerated, and heated along the outer periphery of the core material 51. By welding, the core material 51 is in a compressed state. This is inserted into the outer bag 53, but the inner bag 52 that protrudes from the outer periphery of the core material 51 is folded to the surface of the core material 51 except for the portion disposed on the final seal side of the outer bag 53.

  The inner bag 52 may be a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, or the like that has a low hygroscopic property and can be thermally welded and has a small outgas. Moreover, although the physical adsorption type synthetic zeolite was used for the adsorbent 54, it is not particularly limited to this, and any of physical adsorption and chemical reaction type adsorption may be used as long as it adsorbs moisture and gas.

  Next, specific embodiments of the present invention will be described in detail in the refrigerator configured as described above.

The first embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a view for explaining a refrigerator that employs a vacuum heat insulating material on the side surface of the outer box, and FIG. It is a figure for demonstrating the example which provided the easy tear part which can be easily cut | disconnected in a part of outer bag of a vacuum heat insulating material.
4 (a) is a diagram showing the installation position of the vacuum heat insulating material, and FIG. 4 (b) is a diagram showing a state in which a part of the side surface of the outer box is cut in order to take out the vacuum heat insulating material. ) Is a view of the state in which the cut portion is turned outward. 5 (a) to 5 (d) are views showing a state in which an easy tear portion made of a cut or a minute hole is provided in a part of the outer bag of the vacuum heat insulating material.

  FIG. 4 (a) shows the right side face toward the refrigerator 1, and the broken line is a vacuum heat insulating material 50. This vacuum heat insulating material 50 is bonded to the inner surface of the side plate 21c of the outer box 21 made of a steel plate. It is installed by pasting. For example, a synthetic rubber-based hot melt is generally used as the adhesive, but the adhesive is not particularly limited thereto.

  And in order to take out the vacuum heat insulating material 50 arrange | positioned at the inner surface of a refrigerator, first, as shown in FIG.4 (b), all the upper sides 50a of the vacuum heat insulating material 50, and the side edge connected to the both ends of this upper side 50a. A cutting piece 21c-a is formed using a jigsaw or the like at a cutting position 100 having a predetermined interval from the outer periphery of the vacuum heat insulating material 50 so as to surround a part of 50b.

  Next, as shown in FIG. 4 (c), the cut piece portion 21c-a of the cut portion of the side plate 21c is turned outward with a dedicated tool or pliers so that the vacuum heat insulating material 50 is exposed to the outside. To. Since the vacuum heat insulating material 50 is adhered to the inner side of the side plate 21c by an adhesive, when the cut piece portion 21c-a is turned, it moves along with this and is exposed to the outside. In this state, the vacuum heat insulating material 50 becomes easy for the operator to handle, and the core material 51 of the vacuum heat insulating material 50 is taken out by the operation described below.

  In order to take out the core material 51 from the vacuum heat insulating material 50, it is necessary to cut the outer bag 53. However, when the outer bag 53 is directly cut with a cutting tool such as a cutter, the core material 51 and the inner bag 52 may be cut. There is. In this embodiment, an easy tear portion shown in FIGS. 5A to 5D is provided on the outer bag 53 so that only the outer bag 53 can be easily cut without using a cutting tool such as a cutter.

  FIG. 5A shows a plane of the vacuum heat insulating material 50, and the core material 51 of the vacuum heat insulating material 50 is sealed in the inner bag 52 and then sealed in the outer bag 53. An incision is formed in the portion of the side surface on the upper end side of the outer bag 53 where heat sealing has been performed, and an easy tear portion 60 is provided. The easy tear portion 60 has various shapes. FIG. 5 (b) shows an example in which two triangular easy tear portions 60a are provided, and FIG. 5 (c) shows two rectangular easy tear portions. An example in which 60b is provided is shown, and FIG. 5 (d) shows an example in which two plurality of easy tearing parts 60d having a minute circular shape are provided. Since these easy tear parts 60a, 60b, 60c can be easily torn compared to other parts, no special cutting tool is required.

  Thus, in this embodiment, by providing a plurality of easy tear portions 60a, 60b, 60c in the heat seal portion on the side surface of the outer bag 53, the outer bag 53 can be easily cut and the inner bag 52 can be easily taken out. Can do. In this embodiment, when any two of the easy tear portions 60a, 60b, 60c are provided in the same heat seal, the outer bag 53 can be easily cut, and the inner bag 52 can be easily damaged. I was able to take it out.

  At the time when the outer bag 53 is cut, the core material 51 of the vacuum heat insulating material 50 is released from the reduced pressure state, so that the inner bag 52 is made of a high-density polyethylene film, although it is gradually restored to the thickness before use. Therefore, since the slipperiness with the innermost layer of the outer bag 53 is good, the core material 51 can be taken out relatively easily by pulling out the inner bag 52 containing the core material 51. In the first embodiment, the inner bag 52 is a high-density polyethylene film having a thickness of 20 μm. However, the thickness and the material are not limited to this, and any material may be used as long as it can withstand pulling and has a slippery material. It can also be combined with other materials.

  Further, in this embodiment, as shown in FIG. 5A, the outer bag 53 in a state where a so-called ear portion of the inner bag 52 that protrudes outward from the outer shape of the core material 51 is bent toward the core material 51 side. If the inner bag 52 is inserted into the inner bag 52, the inner bag 52 can be easily pulled out by cutting the outer bag 53. become able to.

  In this embodiment, when the vacuum heat insulating material 50 in which the easy tear portion was not provided in the outer bag 53 was used, the opening of the outer bag 53 was cut using a cutter, but the inner bag 52 was cut together. It became difficult to take out the core material. Further, when the vacuum heat insulating material 50 that does not use the inner bag 52 is used, the outer bag 53 can be opened. However, when the core material 51 is taken out, the core material 51 is broken and can be taken out well. could not.

  Thus, according to the present embodiment, the cut piece 21c-a of the cut portion of the side plate 21c is turned outward by a dedicated tool or a pliers, so that the vacuum heat insulating material 50 is cut into the cut piece 21c-a. It will follow and move and will be exposed to the outside. In this state, the operator can easily take out the inner bag 52 by cutting the outer bag 53 using the easy tear portion 60 provided in the heat seal portion on the side surface of the outer bag 53.

  In addition, it cannot be overemphasized that a present Example can be implemented similarly about the vacuum heat insulating material 50b provided in the backplate.

  Next, a second embodiment of the present invention will be described in detail with reference to FIG. In the second embodiment, a heat insulating material position display part (hereinafter referred to as a position display part) is provided at a position slightly spaced from the vacuum heat insulating material 50 so that the position of the vacuum heat insulating material 50 can be grasped from the external appearance. It is a thing. In addition, since the process of taking out the vacuum heat insulating material 50 of the present embodiment is the same as that of the first embodiment, description of the configuration, operation, effects, and the like regarding this will be omitted.

  6, two position display portions 70 are formed on the outer surface of the side plate 21c of the outer box 21 so that the positions of the upper side 50a of the vacuum heat insulating material 50 and the side sides 50b connected to both ends of the upper side 50a can be seen. Has been. As shown in the figure, the position display unit 70 includes a portion 70a parallel to the upper side 50a of the vacuum heat insulating material 50 and portions 70b parallel to the side sides 50b connected to both ends of the upper side 50a. The material 50 is provided on the outer side in the vicinity of both corners on the upper side with a predetermined interval. The position display unit 70 may be formed by applying paint or may be formed by unevenness provided on the side plate 21 c of the outer box 21.

  Since the installation position of the vacuum heat insulating material 50 can be grasped by the position display unit 70, the operator only has to cut the side plate 21c along the position display unit 70 with the cutting tool as in the first embodiment. . This makes it possible to prevent accidents such as accidentally cutting the vacuum heat insulating material 50.

  Next, a third embodiment of the present invention will be described in detail with reference to FIG. In the third embodiment, a weakened portion with reduced shear strength is formed on the wall surface of the outer box 21 in the vicinity where the vacuum heat insulating material is disposed, and the weakened portion is cut before the crushing step during the recycling process. The core material of the vacuum heat insulating material is taken out by turning up the wall surface in the vicinity where the vacuum heat insulating material is arranged. In addition, since the process of taking out the vacuum heat insulating material 50 of the present embodiment is the same as that of the first embodiment, description of the configuration, operation, effects, and the like regarding this will be omitted.

  As shown in FIGS. 7A and 7B, apart from the position display unit 70 described in the second embodiment, all of the upper side 50a of the vacuum heat insulating material 50 and both ends of the upper side 50a are arranged along this. A weak portion 80 is formed on the inner side surface of the side plate 21C so as to surround a part of the side 50b connected to the side plate 21C. As shown in FIG. 7B, the fragile portion 80 is a groove having a triangular cross section formed on the inner side surface of the side plate 21c of the outer box 21. This groove is formed by cutting or pressing so that the thickness of the side plate 21c is thinner than other regions so that the side plate 21c can be easily cut.

  Therefore, by hitting a portion near the position display portion 70 with a hand tool such as a hammer, the fragile portion 80 is torn in the shear direction. For this reason, since the hit | struck part sinks, the part which installed the vacuum heat insulating material 50 becomes easy to turn. Therefore, the operator can expose the vacuum heat insulating material 50 to the outside by turning the cut piece portion 21c-a of the cut portion of the side plate 21c outward with a dedicated tool or a pliers. By comprising in this way, the side plate 21c can be cut | disconnected without using cutting tools, such as a jigsaw, and working efficiency improves.

  According to the present embodiment, a weakened portion having a reduced shear strength is formed on the wall surface in the vicinity where the vacuum heat insulating material is disposed, and the vacuum heat insulating material is disposed by cutting the weakened portion before the crushing step during the recycling process. The core material of the vacuum heat insulating material was taken out by turning up the nearby wall surface. As a result, only a weakened portion with reduced shear strength is formed on the wall surface in the vicinity where the vacuum heat insulating material is disposed, so that various performances of the refrigerator are not adversely affected. Moreover, since this weak part can be easily cut | disconnected and the wall surface of a heat insulation box can be turned over, the core material of a vacuum heat insulating material can be taken out easily.

  In the present embodiment, the position display unit 70 is formed on the outer surface of the side plate 21c. However, the position display unit 70 may be omitted. This is because, in general, the place where the vacuum heat insulating material 50 is installed is determined, so that the operator can find the fragile portion 80 by roughly striking it with a hammer or the like. Therefore, the appearance design of the refrigerator can be improved by omitting the position display unit 70.

  Next, a fourth embodiment of the present invention will be described in detail with reference to FIG. The fourth embodiment shows an example in which a vacuum heat insulating material installed on the inner side surface of the inner box 22 is taken out. 8A and 8B, an example in which the vacuum heat insulating material 50 attached to the inner side surface of the inner box 22 is taken out from the bottom side of the refrigerator as viewed from the inside of the refrigerator will be described.

  8 (a) and 8 (b), the position display unit 90 indicating that the vacuum heat insulating material 50 is disposed on the outer surface of the inner box 22 in the warehouse is provided from the vacuum heat insulating material 50 in the same manner as in the twenty-third embodiment. It was provided at a position spaced a little. This makes it possible to grasp that the vacuum heat insulating material 50 is arranged. Further, along the position display portion 90, the weak portion 110 is provided on the inner side surface of the inner box 22 in the same manner as in the third embodiment.

  Since the inner box 22 is vacuum-molded by pouring ABS resin, which is a material, it can be coped with by providing projections and depressions for forming the position display portion 90 in the molding die in advance. Similarly, the fragile portion 110 can be dealt with by previously providing a convex portion for forming the fragile portion 110 in the molding die so that the wall thickness is similarly reduced. Therefore, by hitting the position display portion 90 from the outside with a hand tool such as a hammer, the weakened portion 110 is torn in the shearing direction and the hit portion is depressed, so that the vacuum heat insulating material 50 as shown in FIG. The portion of the cut piece 22a pasted with is easily turned.

  The vacuum heat insulating material 50 can be easily exposed by turning the cut piece 22a outward using a hand tool such as a pliers or a dedicated tool. Since the vacuum heat insulating material 50 is provided with a plurality of easy tearing portions in the heat seal portion of the outer bag 53 as described in the first embodiment, the inner bag 52 can be easily exposed and the core material 51 is taken out. Will be able to.

  In addition, although the present Example demonstrated the taking-out of the vacuum heat insulating material arrange | positioned at the side plate and bottom face part of a refrigerator, it can implement similarly in the vacuum heat insulating material arrange | positioned at another part.

  As described above, according to the present invention, since only a part of the wall surface in the vicinity where the vacuum heat insulating material of the heat insulating box is disposed is cut, the various performances of the refrigerator are not adversely affected. Moreover, the core material of a vacuum heat insulating material can be taken out easily by turning up the wall surface of the vicinity where the vacuum heat insulating material is arrange | positioned.

  DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Refrigeration room, 3a ... Ice making room, 3b ... Upper stage freezing room, 4 ... Lower stage freezing room, 5 ... Vegetable room, 6a ... Refrigeration room door, 6b ... Refrigeration room door, 7a ... Ice making room door, 7b ... upper freezer compartment door, 8 ... lower freezer compartment door, 9 ... vegetable compartment door, 10 ... door hinge, 11 ... packing, 12, 14 ... heat insulating partition, 13 ... partition member, 20 ... box, 21 ... outer box 21a ... top plate, 21b ... back plate, 21d ... bottom plate, 21e ... side plate, 22 ... inner box, 23 ... heat insulating material, 27 ... blower, 28 ... cooler, 30 ... compressor, 31 ... condenser, 33 DESCRIPTION OF SYMBOLS ... Expanded polystyrene, 40 ... Concave part, 41 ... Electrical component, 42 ... Cover, 50, 50a-50d ... Vacuum heat insulating material, 51 ... Core material, 52 ... Inner bag, 53 ... Outer bag, 54 ... Adsorbent, 60a-60c ... easy tearing part, 70, 90 ... position display part, 100 ... cutting position, 80.110 Fragile portion.

Claims (4)

A vacuum heat insulating material and a foam heat insulating material are provided between the outer box and the inner box, the wall surface of the outer box where the vacuum heat insulating material is arranged is cut, and the vacuum heat insulating material is turned up by turning up the wall surface of the cut portion. In the refrigerator that is exposed to the outside and takes out the inner bag in which the core material of the vacuum heat insulating material is enclosed from the exposed portion,
A weakened portion with reduced shear strength is formed on the inner surface of the wall surface of the outer box so as to surround all of the upper side of the vacuum heat insulating material and a part of the side of the vacuum heat insulating material connected to both ends of the upper side. Then, the fragile portion is cut and the wall surface in the vicinity where the vacuum heat insulating material is disposed is turned up to expose the vacuum heat insulating material to the outside, and the core material is sealed from the exposed vacuum heat insulating material. A refrigerator characterized by taking out the inner bag. In the refrigerator according to claim 1,
The vacuum heat insulating material is bonded to the inner side surface of the outer box with an adhesive, and the vacuum heat insulating material is brought outside together by turning up a part of the wall surface of the outer box from the cut portion of the fragile portion. A refrigerator characterized by being exposed and taking out an inner bag enclosing a core material from the exposed vacuum heat insulating material. In the refrigerator according to claim 2,
The refrigerator characterized by providing the outer box with a position display section indicating a position to apply a shearing force for cutting the fragile section. In the refrigerator according to any one of claims 1 to 3,
The vacuum heat insulating material is composed of at least a core material, an inner bag incorporating the inner bag, and an outer bag incorporating the inner bag, and a plurality of easy tear portions are provided in a heat seal portion of the outer bag. Refrigerator.

Images