JP2010145002A - Heat insulating case body for refrigerator and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating case body for a refrigerator with excellent cooling performance. <P>SOLUTION: An outer space between an outer case and a vacuum heat insulating material and an inner space between the vacuum heat insulating material and an inner case are completely separated from each other by the vacuum heat insulating material, and the vacuum heat insulating material is installed in the entire region of a space between the outer case and the inner case so as to improve a covering ratio of the vacuum heat insulating material. The outer space between the outer case and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner case are kept well-balanced all the time. Thus, even if foamed heat insulating materials are filled in these spaces, the foamed heat insulating materials are foamed and grown in a well-balanced manner so as to provide the heat insulating case body with favorable quality. Therefore, the refrigerator has excellent cooling performance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating box for a refrigerator in which a vacuum heat insulating material is embedded between an outer box and an inner box, and foamed heat insulating material is injected into a heat insulating space to form foam, and a method for manufacturing the same.

  As shown in Patent Document 1, for example, this type of refrigerator heat insulation box body has a vacuum heat insulating material embedded in the middle between the outer box and the inner box, and a composite layer portion of the vacuum heat insulating material and the urethane foam heat insulating material, There is a single-layer part of only urethane foam insulation.

  FIG. 5 is a rear perspective view of the refrigerator body. A urethane injection hole 5 is formed in the back plate 2 of the refrigerator body 1. A machine room 3 for storing a cooling device for cooling the inside of the refrigerator is provided at the lower part of the refrigerator main body 1.

 FIG. 6 is a front view of a conventional refrigerator main body. On both side surfaces of the refrigerator main body 1, a vacuum heat insulating material 6 is embedded and arranged between the outer box 4 and the inner box 7. In addition, partition walls 8 are provided between the side surfaces of the refrigerator main body to divide the interiors of the respective compartments having different interior temperatures.

  7 is a cross-sectional view taken along the line CC of FIG. As shown in the figure, the vacuum heat insulating material 6 is installed between the outer box 4 and the inner box 7 on both side surfaces of the refrigerator main body 1, and the vacuum heat insulating material 6 is attached to the back plate 2 of the refrigerator main body 1. Has been. The vacuum heat insulating material 6 on the back plate side is not installed at an intermediate position like the vacuum heat insulating materials 6 on both side surfaces of the refrigerator body 1, and is arranged in contact with the back plate 2. Moreover, the vacuum heat insulating material 6 is each independent, and the location 15 only of the urethane foam heat insulating material 9 and the location where the urethane foam heat insulating material 9 and the vacuum heat insulating material 6 are combined as the heat insulating portion of the heat insulating box. It is divided into 16.

  FIG. 8 is a diagram showing a state in which a urethane stock solution is injected and urethane foaming is performed in the AA cross-sectional view of FIG. In FIG. 8, after the urethane stock solution is poured into the space between the outer box 4 and the inner box 7, urethane foam 9 is started from the front surface of the main body toward the back surface, and the state of foam growth is shown. Show.

  In the space part 10a between the outer box 4 and the vacuum heat insulating material 6 and the space part 10b between the vacuum heat insulating material 6 and the inner box 4, when the flow state of urethane foam is unbalanced, the urethane foam 9 The degree of growth may vary. In this way, if the degree of growth of the urethane foam 9 is different, a urethane foam cavity or a lack of strength of the urethane foam resin or foam will occur in the gathering section where the foam tip approaches from several places. To do. For these reasons, the cooling performance is poor, or troubles such as various deformations occur in the appearance of the refrigerator body.

FIG. 9 is an enlarged view of a range D in FIG. The state where the injection head 13 is inserted into the urethane injection hole 5 (see FIG. 5) formed in the back plate 2 of the refrigerator body 1 and the urethane stock solution 9 is injected is shown. The urethane stock solution 9 once drops and stays on the front surface portion of the main body 1, and then foaming is started by a chemical reaction. It is divided into a space portion 10b between the inner box 7 and the inner box 7 so as to grow and foam.
JP 2007-198622 A

  By the way, as shown in Patent Document 1, the vacuum heat insulating material 6 includes a jacket bag made of a film having a multi-layer laminate structure that blocks gas permeation, and a core material made of fine powder such as silica and perlinet or inorganic fibers. After the core material is sealed in the jacket, the gas (air) in the jacket bag is evacuated, vacuumed, and sealed by heat sealing.

  The heat conductivity of this vacuum heat insulating material is 0.008 to 0.0005 W / m · K, which is very excellent in heat insulation performance, so even if the wall thickness of the heat insulation box is made thin, it can penetrate into the cabinet. It is possible to effectively reduce the amount of heat coming.

  Therefore, it is important to improve the area (cover ratio) of the vacuum heat insulating material embedded between the outer box and the inner box, but there is a limit to improving the area of the vacuum heat insulating material. In the space between the outer box and the inner box, this is not only between the composite layer portion of the vacuum heat insulating material and the urethane foam heat insulating material (see reference numeral 16 in FIG. 7), but also between the outer box and the inner box. This is because, due to the structure of the space portion, there is a heat insulating single layer (see reference numeral 15 in FIG. 7) made only of urethane foam heat insulating material, and it cannot always be a composite layer.

  Moreover, in the front part of the refrigerator main body 1, there is a space 17 between the back surface of the bending flange 4a of the outer box 4 and the side end face of the vacuum heat insulating material 6, and the urethane stock solution 9 is injected from the back plate 2 of the refrigerator main body. As a result, the urethane heat insulating material which is foamed and grown from the back surface of the bending flange 4a of the outer box 4 is a space portion 10a between the outer box 4 and the vacuum heat insulating material 6, and the vacuum heat insulating material 6 and the inner box 7. There is a possibility that it cannot grow in a well-balanced manner in the space portion 10b. When these balances are poor, there is a problem in that the foamed heat insulating material 9 which has finally been foamed and grown has a lack of voids and foam strength, resulting in poor cooling performance and poor appearance.

  In view of the above, an object of the present invention is to provide a heat insulating box for a refrigerator excellent in cooling performance and a method for manufacturing the same.

  In order to achieve the above object, the heat insulating box of the refrigerator according to the present invention includes an outer box, an inner box, a vacuum heat insulating material provided in a space between the outer box and the inner box, and the vacuum heat insulating material. A foam heat insulating material filled in the space portion excluding the material, a space portion between the outer box and the vacuum heat insulating material, and a space portion between the vacuum heat insulating material and the inner box, It is completely separated by a vacuum heat insulating material.

  According to the above configuration, the space between the outer box and the vacuum heat insulating material and the space between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. A material is installed in the whole space part of an outer box and an inner box, and the coverage of a vacuum heat insulating material can be improved.

  Moreover, the balance between the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box can always be maintained, and foam heat insulating material is injected into these spaces. Even in this case, the foamed heat insulating material foams in a well-balanced manner, and a conventional heat insulating portion without a hollow portion or insufficient foaming strength can be formed.

  Such a heat insulating box manufacturing method includes a vacuum heat insulating material provided in a space portion between an outer box and an inner box, an outer space portion between the outer box and the vacuum heat insulating material, and the vacuum heat insulating material. The inner space portion between the material and the inner box is completely separated by the vacuum heat insulating material, and the foam heat insulating material is separately injected into the inner space portion and the outer space portion, respectively, and foamed and grown.

  The complete separation of the space by the vacuum heat insulating material is also performed on the front side of the outer box. At the junction between the front side of the outer box and the inner box, the back side and the side end face of the vacuum heat insulating material are brought into close contact with each other. For the close contact between the vacuum heat insulating material and the joint, a sealer is used in addition to directly bonding the vacuum heat insulating material to the joint. This sealer is preferably configured so as to be able to come into contact with and separate from the joint portion and to adjust the balance between the inner space portion and the outer space portion.

  According to the above configuration, the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box are completely around the joint between the outer box and the inner box. Separated.

  And an outer box, an inner box, and a vacuum heat insulating material provided in a space portion between the outer box and the inner box, the space portion including both side surface portions, a top surface portion, a bottom surface portion of the refrigerator main body, and A vacuum heat insulating material is installed in each of these space portions, and the side edges of these vacuum heat insulating materials are in close contact with each other.

  According to the said structure, since a vacuum heat insulating material is each installed in the space part of the both sides | surfaces of a refrigerator main body, a top surface part, a bottom face part, and a back surface part, the area of a vacuum heat insulating material can be improved.

  At this time, the side edges of the vacuum heat insulating material installed in the space portions of the both side surfaces, top surface, bottom surface and back surface of the refrigerator main body are subject to vacuum breakage of the vacuum heat insulating material or passage of the heat insulating material to be injected. It is preferable to join with a sealer so that it does not occur.

  According to the above configuration, since the side edges of the vacuum heat insulating material are joined together by the sealer, it is possible to prevent the vacuum heat insulating material from passing through the vacuum heat insulating material and the foamed heat insulating material such as the urethane stock solution to be injected. Fluidity can be stabilized.

  In addition, it is possible to provide injection means for separately injecting the heat insulating foam material into the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box. .

  As the injection means, an injection port for injecting the foam heat insulating material is provided on the back side of the refrigerator main body, and the foam heat insulating material from the injection port is provided in the inner space portion corresponding to the injection port. An intermediate injection hole that leads to the inner injection hole can be formed, and a lid that can be opened and closed is provided.

  According to the above configuration, by providing injection means for separately injecting the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box, foaming is performed. The flow of the heat insulating material becomes smooth, a stable high quality heat insulating layer can be formed, and the cavity portion of the heat insulating portion and insufficient foam strength can be solved.

  In addition, in order to prevent a vacuum heat insulating material from moving by foaming pressure and breaking the balance of an inner side space part and an outer side space part, it is preferable to provide the holding mechanism holding a vacuum heat insulating material. This holding mechanism is, for example, a configuration in which a holding member that sandwiches the vacuum heat insulating material between the inner box and the outer box, or a configuration in which the vacuum heat insulating material is bonded and held to the inner box and / or the outer box via the holding member. Can be illustrated. In any case, it is desirable that the holding material is disposed so as not to hinder the fluidity of the stock solution as much as possible when the heat insulating foam material such as the urethane stock solution is injected.

  If a refrigeration cycle is provided inside or outside the heat insulating box as described above, a refrigerator having excellent cooling performance can be provided.

  According to the present invention, the outer space portion between the outer box and the vacuum heat insulating material and the inner space portion between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. A material is installed in the whole space part of an outer box and an inner box, and the coverage of a vacuum heat insulating material can be improved. Moreover, the balance between the outer space between the outer box and the vacuum heat insulating material and the inner space between the vacuum heat insulating material and the inner box can always be maintained, and foam heat insulating material is injected into these spaces. Even if foamed heat insulating material foams in a well-balanced manner, it is possible to provide a high-quality heat insulating box.

  Hereinafter, the heat insulation box of the refrigerator which is an embodiment of the present invention is explained with reference to drawings. Note that FIG. 5 is a drawing common to the present embodiment and the conventional embodiment, and is used for explanation as necessary. The same functional parts as those in the conventional refrigerators shown in FIGS.

  FIG. 1 is a front view of a refrigerator body showing an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIGS. 3 and 4 are enlarged views of a range B in FIG.

  The refrigerator of the present embodiment includes a heat insulating box 20 that constitutes a main part of the refrigerator main body 1 and a cooling device (not shown) housed in the lower machine chamber 3 of the heat insulating box.

  The heat insulation box 20 includes an outer box 4, an inner box 7, a vacuum heat insulating material 6 embedded in a space 10 between the outer box 4 and the inner box 7, and the space excluding the vacuum heat insulating material 6. And a foam heat insulating material 9 filled in the portion 10.

  The outer box 4 is made of a steel plate material having an opening on the front side. Usually, the left and right side surfaces 4b and 4c and the top surface 4d are formed by bending a single steel plate into a U-shape. The back plate 2 is fixed to the left and right side portions 4b and 4c and the rear edge portion of the top surface portion 4d. The front end portions of the left and right side surface portions 4 b and 4 c and the top surface portion 4 d are bent inward and joined to the inner flange at the front end of the inner box 7. The bottom plate (not shown) constituting the bottom of the outer box 4 may be formed by bending together with the back plate 2 from a single steel plate. The front end portion of the bottom plate is also bent inward and joined to the inner flange at the front end of the inner box 7.

  The inner box 7 is made of hard resin, and a plurality of storage chambers such as a refrigerator compartment, a freezer compartment, and a vegetable compartment formed in a concave shape are vertically partitioned by a partition wall 8.

  The vacuum heat insulating material 6 includes an outer bag 6a made of a film having a multilayer laminate structure that prevents gas permeation, and a core material 6b made of fine powder such as silica and pearlite or inorganic fibers.

  In addition to the above structure, the core material 6b may be composed of a plate-like member made of open-cell synthetic resin foam and a laminate of fibrous materials made of inorganic fibers and / or organic fibers. The reason why open cells are used as the foam is that, when evacuated, a pressure reducing effect can be obtained more easily than a closed cell foam.

  Any outer bag 6a may be used as long as it has a gas barrier property and can accommodate the core material 6b and maintain the inside in a reduced pressure state. Among them, those that can be heat sealed are preferable. Examples thereof include a polyamide-based resin, aluminum vapor-deposited (PET) polyethylene terephthalate, aluminum foil, and a gas barrier film having a multilayer laminate structure in which a high-density polyethylene resin is disposed in the innermost layer.

  The vacuum heat insulating material 6 is formed by sealing the core material 6b in the outer bag 6a, then exhausting the gas (air) in the outer bag 6a, forming a vacuum, and sealing by heat sealing. This vacuum heat insulating material 6 has a heat conductivity of 0.008 to 0.0005 W / m · K, which is very excellent in heat insulating performance. Therefore, even if the wall thickness of the heat insulating box is reduced, the amount of heat entering the cabinet can be effectively reduced.

  And the space part 10 formed between the outer box 4 and the inner box 7 is composed of an outer space part 10 a between the outer box 4 and the vacuum heat insulating material 6 by the vacuum heat insulating material 6, and the vacuum heat insulating material 6. The inner space portion 10b between the inner box 7 and the inner box 7 is completely separated.

  Moreover, in the junction part of the front surface side of the refrigerator main body 1, and an inner box, the back surface and the side end surface of the vacuum heat insulating material 6 are completely closely_contact | adhered. Specifically, a bent flange 4a bent inward is formed on the front side of the outer box 4, and the bent flange 4a and the flange at the tip of the inner box 7 are joined to each other to connect the front of the heat insulating box. Configure the frame. The back surface of the front frame part of such a heat insulation box, specifically, the back surface of the bending flange 4a of the outer box 4 and the side end surface of the vacuum heat insulating material 6 are brought into close contact with a joining means such as a sealer.

  FIG. 2 shows a state in which the back surface of the bending flange 4 a of the outer box 4 and the side end surface of the vacuum heat insulating material 6 are joined by a sealer 28. The sealer 28 is bonded to the side end surface of the vacuum heat insulating material 6, but is only in close contact with the back surface of the bending flange 4 a of the outer box 4, and is not bonded. This is because, in the case where the specification is such that the foam sealer 28 is bonded to the flange 4a, it takes time to remove the vacuum heat insulating material 6 when the position of the vacuum heat insulating material 6 is improper when it is attached. In order not to adhere the foam sealer 28 and the flange 4a, it is preferable to apply a release agent to the flange side.

  Thus, when the back surface of the bending flange 4a in the front frame portion of the heat insulating box 20 and the side end surface of the vacuum heat insulating material 6 are brought into close contact with each other by a joining means such as a sealer 28, the outer box 4 and the vacuum around the bending flange 4a are vacuumed. The outer space portion 10a between the heat insulating material 6 and the inner space portion 10b between the vacuum heat insulating material 6 and the inner box 7 can be completely separated.

  In the present embodiment, the embodiment in which the foam sealer 28 is not bonded to the flange 4a has been exemplified. However, it is needless to say that the vacuum sealer may be bonded if the alignment can be performed smoothly.

  Further, in order to completely separate the outer space 4a and the outer space portion 10a of the vacuum heat insulating material 6 and the inner space portion 10b between the vacuum heat insulating material 6 and the inner box 7 by the vacuum heat insulating material 6, As shown in FIG. 1, the vacuum heat insulating material 6 arrange | positioned in the space part 10 between the box 4 and the inner box 7 is each arrange | positioned at the both-sides surface part, the top | upper surface part, the bottom face part, and the back part of the refrigerator main body 1, The side edges of the vacuum heat insulating material 6 are brought into close contact with each other.

  As shown in FIG. 3, the close contact structure between the side edges of each vacuum heat insulating material 6 is a vacuum heat insulating material by a soft foam sealer 21 so that vacuum breakage of the vacuum heat insulating material 6 or passage of the heat insulating material to be injected does not occur. 6 side end surfaces are affixed.

  In this way, the urethane stock solution that becomes the foam heat insulating material 6 is injected into the space portion partitioned by the vacuum heat insulating material 6 into the outer space portion 10a and the inner space portion 10b, and foamed and grown. At this time, holding means is provided so that the position of the vacuum heat insulating material 6 does not move due to the foaming pressure. For example, the holding means includes a holding member 29 that holds the vacuum heat insulating material from the inside of the outer box 4 and the inner box 7 so as not to inhibit the foaming growth of urethane. The holding member 29 is composed of a long resin member having an H-shaped cross section (for example, ABS resin, polypropylene, etc.). The holding member 29 is attached to a predetermined position on the back surface of the inner box 7 by hot melt. A hot melt agent is also applied to the side surface of the holding member 29 opposite to the inner box, and the vacuum heat insulating material 6 is stuck and held thereon.

  Insulating foam material (urethane stock solution) is injected into the outer space 10 a between the outer box 4 and the vacuum heat insulating material 6 and the inner space 10 b between the vacuum heat insulating material 6 and the inner box 7. The injection port 5 is divided to form foam insulation.

  FIG. 3 shows a state in which a urethane stock solution, which is a stock solution of foam heat insulating material, is injected into the vacuum heat insulating material 6 and the inner space 10 b of the inner box 4. FIG. 4 shows a state in which the urethane stock solution is injected into the outer space 10 a between the vacuum heat insulating material 6 and the outer box 4.

  3 and 4, in any case, the back plate 2 of the outer box 4 is formed with an injection port 5 for injecting a urethane stock solution, and an open / close lid 27 for closing the injection port 5 so as to be freely opened and closed is provided on the back plate. 2 on the back side.

  Further, an intermediate injection hole 24 is formed in the vacuum heat insulating material 6 so as to face the injection port 5 and lead the urethane stock solution from the injection port 5 to the inner space portion 10b corresponding to the injection port 5. A lid 25 that closes the hole 24 so as to be freely opened and closed is disposed on the lower surface side of the vacuum heat insulating material 6. In addition, although the intermediate injection hole 24 was provided in the vacuum heat insulating material 6, you may form it in the soft sealer 21 part.

  Although not shown, a heat radiating pipe of a cooling device (not shown) is embedded inside the back plate 2 so as to constitute a part of the refrigeration cycle.

  Next, the manufacturing method of the heat insulation box will be described. First, the injection head 13 is inserted into the urethane injection port 5 of the back plate 2 of the refrigerator body 1, and the urethane stock solution that is the stock solution of the foam insulation 9 is injected from the injection head 13. inject.

  In this state, the injection head 13 for injecting the urethane stock solution passes through the intermediate injection hole 24 that has been previously processed in the vacuum heat insulating material 6 on the back surface, and the inner space portion between the vacuum heat insulating material 6 and the inner box 7. 10b, and the urethane stock solution 9 is injected into the inner space 10b.

  The injected urethane stock solution starts to foam after falling to the front side of the refrigerator body 1. When foaming is started, the inner space portion 10b and the outer space portion 10a are completely separated, and therefore, the entire inner space portion is filled with the urethane heat insulating foam material 9 in the process of foam growth. When injecting the urethane stock solution, the injection head 13 may be inserted only from the two injection ports 5 on the upper side shown in FIG.

  At this time, the vacuum heat insulating material 6 is held in the inner box 4 by the holding member 29, but the attaching direction of the holding member 29 to the inner box is perpendicular to the height direction of the inner box 4. It has become. Therefore, when the urethane stock solution is injected from the inlet 5 on the back side, the holding member 29 is attached in a direction that does not inhibit the flow of the urethane stock solution, so that it is possible to prevent the foam growth from being inhibited.

  Next, as shown in FIG. 4, the injection head 13 is returned from the inner space portion 10b to the outer space portion 10a, and the urethane stock solution is injected into the outer space portion 10a. If it does so, a urethane stock solution will fall to the front side of the refrigerator main body 1, and will start foaming. When foaming is started, the inner space portion 10b and the outer space portion 10a are completely separated, so that the entire outer space portion is filled with the urethane heat insulating foam material 9 during the foaming growth process.

  In addition, when inject | pouring this urethane stock solution, what is necessary is just to insert the injection | pouring head 13 only from the injection | pouring port 5 of two lower sides shown in FIG.

  In addition, the injection | pouring of the urethane undiluted solution demonstrated based on FIG. 3 and FIG. 4 may be a combination with the reverse use of the urethane inlet 5 and the injection | pouring head 13 by the shape and structural specification of a refrigerator main body. In short, in order to satisfy the good urethane heat insulating foam 9, it is necessary to use them freely. This proper use enables stable urethane foam 9 even if the flow state of urethane foam becomes unbalanced.

  Therefore, it is possible to prevent the void portion of the urethane foam heat insulating material 9 and the resin of the foamed foam heat insulating material 9 and insufficient strength of the foam from occurring at the concentrating portion where the foam leading ends approach several places as in the past. In addition, the control range of the flow of the foaming material is expanded, the filling property or the amount of the urethane stock solution can be reduced, and the heat insulating box body of the refrigerator with more stable quality can be obtained.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added within the scope of the present invention. For example, although urethane foam is exemplified as the heat insulating foam material in this embodiment, the present invention is not limited to this, and other foamed resin materials may be used.

The front view of the refrigerator main body which shows embodiment of this invention AA sectional view of FIG. The figure which shows the state which is inject | pouring urethane stock solution into the inner side space part by the enlarged view of the B range of FIG. The figure which shows the state which has inject | poured the urethane stock solution to the outer side space part by the enlarged view of the B range of FIG. The perspective view which looked at the refrigerator body from the back Front view of conventional refrigerator heat insulation box CC sectional view of FIG. In CC sectional drawing of FIG. 6, the figure shown in the state which inject | poured urethane stock solution and is performing urethane foaming Enlarged view of range D in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Back plate 3 Machine room 4 Outer box 5 Inlet 6 Vacuum heat insulating material 7 Inner box 8 Partition wall 9 Urethane foam 10 Space part 10a Outer space part 10b Inner space part 13 Injection head 20 Heat insulation box 21 Soft sealer 24 Intermediate injection hole 25 Lid 27 Lid 28 Sealer 29 Holding member

Claims (8)

  An outer box, an inner box, a vacuum heat insulating material provided in a space portion between the outer box and the inner box, and a foam heat insulating material filled in the space portion excluding the vacuum heat insulating material, A heat insulating box for a refrigerator, wherein the space between the outer box and the vacuum heat insulating material and the space between the vacuum heat insulating material and the inner box are completely separated by the vacuum heat insulating material. body.   In the joint between the front side of the outer box and the inner box, the back surface and the side end face of the vacuum heat insulating material are in close contact, and the outer space between the outer box and the vacuum heat insulating material around the flange, and the vacuum heat insulating material The heat insulation box of the refrigerator according to claim 1, wherein an inner space between the box and the inner box is completely separated.   An outer box, an inner box, and a vacuum heat insulating material provided in a space portion between the outer box and the inner box, wherein the space portion includes both side surfaces, a top surface portion, a bottom surface portion, and a back surface portion of the refrigerator body. The heat insulation box for a refrigerator according to claim 1 or 2, wherein a vacuum heat insulating material is installed in each of the space portions, and each side edge of the vacuum heat insulating material is in close contact with each other.       Each side edge of the vacuum heat insulating material installed in the space on the both sides of the refrigerator body, the top surface, the bottom surface, and the back surface does not cause vacuum breakage of the vacuum heat insulating material or passage of the heat insulating material to be injected. The heat-insulating box for a refrigerator according to claim 1, 2 or 3, wherein the heat-insulating box is joined to the wall with a sealer.     The outer space part between the outer box and the vacuum heat insulating material and the inner space part between the vacuum heat insulating material and the inner box are provided with injection means for injecting the heat insulating foam material separately. The heat insulation box of the refrigerator in any one of Claims 1-4.     An inlet for injecting foam insulation is provided on the back side of the refrigerator main body, and an intermediate injection hole for guiding the foam insulation from the inlet to the inner space is provided in the vacuum insulation or sealer corresponding to the injection inlet. 6. The heat insulating box for a refrigerator according to claim 5, wherein the intermediate injection hole is formed and can be freely opened and closed.   A refrigerator having a refrigeration cycle provided inside or outside the heat insulating box according to any one of claims 1 to 6.   By the vacuum heat insulating material provided in the space between the outer box and the inner box, the outer space between the outer box and the vacuum heat insulating material, and the inner space between the vacuum heat insulating material and the inner box Is completely separated by the vacuum heat insulating material, and a foam heat insulating material is separately injected into the inner space portion and the outer space portion, respectively, and foamed and grown.

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