JP2005180585A - Heat-insulating structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-insulating structure capable of easily decomposing component materials by kind and reducing equipment cost and production costs. <P>SOLUTION: This heat-insulating structure is constituted by a heat-insulating member 13 obtained by sealing a surface of a precast heat-insulating member in a bag capable of preventing the passage of moisture or coating the surface of the precast heat-insulating member with a film capable of preventing the passage of moisture, between face materials. The face materials are composed of an outer face material 11 and an inner face material 12 composing an outer face and an inner face of a heat insulating door 10. The face materials are composed of an outer box and an inner box composing the outer face and the inner face of the heat insulating casing 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat insulating structure including a heat insulating member between face members.

  Conventionally, glass fiber, closed-cell foamed polyurethane, or the like is used as a heat insulating material for cold storage or heat insulation in a freezer. When the glass fiber is condensed, moisture is contained inside the heat insulating material and the generation of mold and the heat insulating effect are deteriorated. Further, even if the polyurethane foam is condensed, it does not contain moisture inside the heat insulating material, so that no mold is generated and the heat insulating effect is not deteriorated. When this polyurethane foam is used for the heat insulating door 100, as shown in FIG. 4 and FIG. 5, the outer surface material 111 and the inner surface material 112, which are substantially rectangular in the shape of a vertically long side surface, are combined, and breakers 113 as heat insulating materials are respectively provided at both ends. It is provided in a box shape, and reinforcing members 114 are attached to the peripheral corners to assemble external parts of the heat insulating door 100. A foaming liquid is injected between the outer surface material 111 and the inner surface material 112 to integrally foam, a handle 115 is attached to a predetermined position, and a gasket 116 is attached to the inner surface material 112 using a gasket attachment tool (not shown). It was done.

  However, in the case where the heat-insulating material integrally foamed between the outer surface material and the inner surface material is a closed-cell foamed polyurethane, a higher thermal conductivity than that of the glass fiber can be achieved, but the interior is set to an ultra-low temperature (for example, −90 ° C. or lower). When used for a heat insulating box of a freezer, in order to obtain a predetermined heat insulating performance, the heat conductivity is high, and therefore the thickness of the heat insulating material has to be remarkably increased.

  Therefore, in recent years, vacuum heat insulating materials that are thin but have high heat insulating performance have been used. As is well known, this vacuum heat insulating material achieves higher thermal conductivity than heat insulating materials such as glass fiber and closed cell polyurethane foam, so the thickness of the freezer heat insulating material is reduced to reduce the installation area or It becomes possible to expand the internal volume or reduce the power consumption of the cooling device. The vacuum heat insulating material is a predetermined vacuum evacuation device in which an open-cell foamed polyurethane heat insulating material is inserted between two gas barrier films obtained by laminating a heat welding layer made of polyethylene, polypropylene, or the like from the inside and an aluminum layer and a surface protective layer. Then, after the inside was evacuated, the peripheral portion of the gas barrier film was heated to weld and seal the heat-welded layers to each other (see Patent Document 1).

Japanese Patent No. 3357747

  However, when using foam insulation as in the past, the external parts were assembled and the insulation was injected between the face materials to integrally foam. However, the injection of foaming liquid was prevented and the foaming liquid circulation efficiency was improved. Therefore, it was necessary to warm the parts and increase the circulation efficiency of the foaming liquid. In addition, a jig having a strength capable of withstanding the high pressure at the time of foaming has to be prepared, and there has been a problem that much labor and cost are required.

  On the other hand, it is an integral foaming structure in which a liquid heat insulating material is injected into the inner box and outer box, the door, etc. as the heat insulating part of the commercial refrigerated freezer and foamed inside. However, this structure requires a large facility, and the productivity is extremely poor, such as high cost and long time for foaming. In addition, it is difficult to confirm whether the heat insulating material is surely contained in the entire interior, such as corners inside the structure of the heat insulating portion, or whether there is an unfoamed portion inside. For this reason, troubles such as poor heat insulation efficiency have occurred in the market.

  Here, in recent years, due to the problem of environmental destruction, at the time of disposal, the constituent material of the heat insulating structure must be classified into a type such as metal, synthetic resin, or burning material. However, in the former heat insulating structure, the heat insulating material integrally foamed in the assembled external parts is bonded inside. Further, the latter heat insulating structure has a foamed polyurethane heat insulating material inserted between two gas barrier films laminated with a heat welding layer, an aluminum layer and a surface protective layer from the inside, and the inside is evacuated by a vacuum exhaust device to The weld layers were welded together and sealed. For this reason, there existed a problem that the appearance component to which the heat insulating material was bonded, the aluminum layer to which the heat insulating material was welded, the surface protective layer, and the like could not be easily classified.

  In addition, when making a heat insulating structure using a vacuum heat insulating material, it is necessary to use a device such as a vacuum exhaust device, which has a problem that the cost of the equipment increases and the production cost of the heat insulating structure increases. It was.

  That is, the heat insulating structure of the present invention is formed by arranging a heat insulating member formed by covering the surface of a heat insulating material formed in advance with a material capable of preventing the passage of moisture between the face materials.

  The heat insulating structure of the invention of claim 2 is formed by arranging a pre-formed heat insulating material between the face materials, and is provided with a drainage channel for discharging water generated between the face materials. is there.

  In addition to claim 2, the heat insulating structure of the invention of claim 3 is obtained by coating the surface of the heat insulating material with a material capable of preventing the passage of moisture.

  In addition to the first, second, or third aspect, the heat insulating structure according to the fourth aspect of the present invention is a structure in which a heat insulating material is enclosed in a bag capable of preventing the passage of moisture.

  Further, the heat insulating structure of the invention of claim 5 is obtained by coating the surface of the heat insulating material with a film capable of preventing the passage of moisture in claim 1, claim 2 or claim 3.

  The heat insulating structure of the invention of claim 6 is the heat insulating material according to claim 1, claim 2, claim 3, claim 4 or claim 5, wherein the heat insulating material has a cushioning property.

  Furthermore, the heat insulation structure of the invention of claim 7 is the heat insulation structure of claim 1, claim 2, claim 3, claim 4 or claim 5, wherein the heat insulating material is made of closed-cell foamed polyurethane. .

  Furthermore, in addition to claim 1, claim 2, claim 3, claim 5, claim 6 or claim 7, the heat insulating structure of the invention of claim 8 is a heat insulating material and a face material. A cushioning material is interposed between the two.

  Further, the heat insulating structure of the invention of claim 9 is the claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7 or claim 8, wherein the face material is It is the outer surface material and inner surface material which comprise the outer surface and inner surface of a heat insulation door, It is characterized by the above-mentioned.

  Further, in the heat insulating structure of the invention of claim 10, the face material in claim 1, claim 2, claim 3, claim 4, claim 5, claim 7, or claim 8, It is the outer box and inner box which comprise the outer surface and inner surface of a heat insulation box, It is characterized by the above-mentioned.

  The heat insulating structure of the invention of claim 1 is configured by arranging a heat insulating member formed by covering the surface of a pre-formed heat insulating material with a material capable of preventing the passage of moisture between the face materials. Further, the face material of the heat insulating door or the heat insulating box and the heat insulating member as in the inventions of claim 9 and claim 10 can be disassembled relatively easily, and separation disposal or reuse becomes easy. Further, the quality can be stabilized and the equipment cost can be reduced as compared with the case where the heat insulating material is integrally foamed between the face materials.

  In particular, since the heat insulating material is coated with a material capable of preventing the passage of moisture, it is possible to avoid inconvenience that condensation occurs due to water vapor entering the inside and the heat insulating performance of the heat insulating material deteriorates due to water absorption. It becomes like this.

  The heat insulating structure of the invention of claim 2 is formed by arranging a preliminarily molded heat insulating material between the face materials, and is provided with a drainage channel for discharging water generated between the face materials. Condensed water generated between the face materials by the road can be smoothly discharged, and deterioration of the heat insulating material due to water absorption can be effectively suppressed. Moreover, since the heat insulating door and the face material of the heat insulating box body and the heat insulating member as in the inventions of claim 9 and claim 10 can be disassembled relatively easily, separation disposal or reuse becomes easy. In addition, the quality can be stabilized and the equipment cost can be reduced as compared with the case where the heat insulating material is integrally foamed between the face materials.

  In addition to the above, the heat insulation structure of the invention of claim 3 is coated with a material capable of preventing the passage of moisture, so that dew condensation occurs due to water vapor entering the interior, and water absorption absorbs the heat insulation material. The inconvenience that the heat insulation performance deteriorates can be avoided in advance.

  In the heat insulating structure of the invention of claim 4, since the heat insulating material is enclosed in a bag capable of preventing the passage of moisture in each of the above inventions, the bag effectively prevents water absorption of the heat insulating material due to condensation occurring inside. Will be able to. In particular, since only the heat insulating material is enclosed in the bag, the production cost can be reduced.

  The heat insulating structure of the invention of claim 5 is the heat insulating material due to dew condensation generated inside because the surface of the heat insulating material in claim 1, 2 or 3 is coated with a film capable of preventing the passage of moisture. Water absorption can be effectively prevented by the film. In particular, since the heat insulating material itself is coated with a film, the close contact with the face material is improved, and the rigidity can be improved.

  In the heat insulating structure of the invention of claim 6, since the heat insulating material has cushioning properties in addition to the above inventions, the degree of freedom of the shape of the heat insulating material is improved, the air layer inside the heat insulating structure is reduced, and water vapor The amount can be reduced and the occurrence of condensation can be suppressed.

  In addition to the invention of claim 1, claim 2, claim 4, or claim 5, the heat insulating structure of the invention of claim 7 is formed of closed-cell foamed polyurethane. The heat insulation performance as a body is remarkably improved.

  In addition to the above inventions, the heat insulating structure of the invention of claim 8 has a cushioning material interposed between the heat insulating material and the face material, so that the air layer inside the heat insulating structure is reduced and the sealing property is improved. By improving, it is also possible to avoid the intrusion of water vapor from the outside, and it is possible to further suppress the occurrence of condensation as a whole.

  The object of the present invention is to cover the heat insulating material with a material capable of preventing the passage of moisture for the purpose of easily disassembling the constituent materials of the heat insulating structure into types and solving the inconvenience of increasing the equipment cost and production cost. Realized with a simple configuration.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a commercial freezer 1 equipped with a heat insulating structure of the present invention, and FIG. 2 is an exploded perspective view of a heat insulating door of the commercial freezer 1 of FIG. The freezer 1 of an Example is a vertical business freezer installed in the kitchen of a hotel, a restaurant, etc., for example, and is comprised by the heat insulation box 2 opened to the front.

  The front opening 4 of the storage chamber 3 configured in the heat insulating box 2 is partitioned vertically and horizontally by a middle partition 5 extending in the horizontal direction and a vertical partition 6 extending in the vertical direction at the center. The left side of the vertical partition 6 is provided with a storage room for storing cooked food (dish) and ingredients in two upper and lower stages, and the right side of the vertical partition 6 is a drawer-type storage for storing food (food) before cooking. A room is provided.

  In the upper part of the storage chamber 3, a cooler (not shown) constituting a cooling device is provided for freezing the interior of the storage chamber 3, and the interior of the storage chamber 3 is cooled to a predetermined temperature by this cooler. . In addition, a machine room 8 whose periphery is covered with a panel 7 is defined on the top surface of the heat insulating box 2. In the machine room 8, a compressor, a condenser, and the like (not shown) constituting a cooling device are installed, and these constitute a well-known refrigerant circuit of the cooling device together with a cooler provided in the upper part of the storage chamber 3. doing.

  On the other hand, the opening 4 of the storage chamber 3 partitioned by the middle partition 5 and the vertical partition 6 is closed openably and closably by two sets of double-split heat insulating doors 10 and 10 and heat insulating doors 20 and 20 provided above and below. The heat insulating doors 10 and 10 are pivotally supported by hinges below the opening 4 of the storage chamber 3, and the heat insulating doors 20 and 20 are pivotally supported by hinges above the opening 4 of the storage chamber 3. As shown in FIG. 2, the heat insulation door 10 (corresponding to the heat insulation structure of the present invention) includes an outer surface material 11 having a U-shaped cross section, and a flat inner surface material 12 attached so as to close the opening of the outer surface material 11. And a heat insulating member 13 housed in the opening of the outer surface material 11.

  Double-sided materials (outer surface material 11, inner surface material 12) are made of synthetic resin or steel plate. A handle 19 is provided in the vicinity of the upper portion of the outer surface material 11 (on the side of the heat insulating door 20), and the handle 19 is provided with a predetermined dimension embedded on the heat insulating member 13 side. The heat insulating member 13 is made of a closed-cell heat insulating material foamed in advance. The periphery of the heat insulating material is covered with a material capable of preventing the passage of moisture, and the outer diameter of the heat insulating member 13 can be smaller than the outer surface material 11 by a predetermined dimension. ing. Examples of the material capable of preventing the passage of moisture include a synthetic resin bag made of an elastic vinyl chloride sheet, a vinyl sheet, a polyethylene sheet, or the like. In this case, as the heat insulating material of the heat insulating member 13, a heat insulating material such as rigid polyurethane foam without a cushion is used.

  The heat insulating member 13 covers the periphery of the heat insulating material with a bag such as a vinyl sheet or a polyethylene sheet that can prevent the passage of moisture, and the opening of the bag is sealed with an adhesive, an adhesive tape, heat welding, or the like. This prevents moisture from entering the heat insulating member 13. That is, the heat insulating member 13 is formed around the heat insulating material so as to avoid the inconvenience that condensation occurs due to water vapor entering the heat insulating member 13 and the heat insulating material absorbs the dew condensation. Is covered with a bag that can block the passage of moisture. Further, the heat insulating member 13 is provided with a notch 13A at a portion corresponding to the handle 19. A recessed portion of the handle 19 attached to the outer surface material 11 is inserted into the notch 13A.

  And the heat insulation member 13 is inserted in the outer surface material 11 from the opening side. Since the heat insulating member 13 is smaller than the outer surface material 11 as described above, a cushion material 15 such as closed cell foam urethane is inserted between the periphery of the heat insulating member 13 and the outer surface material 11. At this time, the cushion material 15 is larger than the gap between the periphery of the heat insulating member 13 and the outer surface material 11 and is press-fitted between the periphery of the heat insulating member 13 and the outer surface material 11. Further, the heat insulating material 14 is inserted into the notch 13 </ b> A portion of the heat insulating member 13. The heat insulating material 14 is formed in a size substantially equal to the notch 13 </ b> A and has a thickness that contacts the inner surface material 12 and the handle 19. The heat insulating material 14 is configured so that the heat insulating effect of the heat insulating door 10 in the handle 19 portion is not significantly impaired.

  Thus, the heat insulating member 13 is prevented from moving in the outer surface material 11 and the heat insulating effect of the heat insulating door 10 is prevented from being lowered. Note that, as is well known, foamed urethane has a large number of foamed air inside, and it is needless to say that the cushioning material 15 can obtain a heat insulating effect similar to that of closed-cell foamed polyurethane. Further, the cushion material 15 is covered with a bag that can block the passage of moisture in the same manner as the heat insulating member 13 to prevent moisture from entering the inside, thereby preventing the occurrence of mold and the like inside. good.

  Next, the inner surface material 12 and the frame 16 are assembled in order to the heat insulating member 13 inserted into the outer surface material 11 and fastened with screws (not shown), and the gasket 18 is attached using a gasket attachment tool (not shown). At this time, a cushion material (not shown) is interposed between the heat insulating member 13 and either the outer surface material 11 or the inner surface material 12, and the heat insulating member 13 is urged toward either the outer surface material 11 or the inner surface material 12. Thereby, the heat insulation member 13 can prevent the play of the outer surface material 11 or the inner surface material 12 direction. In addition, the cushioning material interposed between either the heat insulating member 13 and the outer surface material 11 or the inner surface material 12 is also covered with a bag capable of blocking the passage of moisture to prevent moisture from entering the inside, It is better to prevent inconvenience that mold and the like occur inside.

  The corners of the four corners are covered with the reinforcing member 17 and are also fastened and fixed with screws (not shown), thereby protecting the corners from being deformed or damaged by an external force. The heat insulation door 20 is configured in the same manner as the other heat insulation doors 10 in that the attachment position of the handle 29 is different from the heat insulation door 10 (in this case, the handle 29 of the heat insulation door 20 is attached in the vicinity of the handle 19 of the heat insulation door 10). Therefore, the description is omitted. The heat insulating doors 10 and 10 and the heat insulating doors 20 and 20 assembled as described above close the opening 4 of the storage chamber 3 so as to be freely opened and closed.

  Thus, since the heat insulating door 10 as the heat insulating structure is provided with the heat insulating member 13 covering the surface of the heat insulating material with a bag capable of preventing the passage of moisture between the outer surface material 11 and the inner surface material 12, The outer surface material 11 and inner surface material 12 of the heat insulating door 10 and the heat insulating box 2 and the heat insulating member 13 can be disassembled relatively easily. As a result, the outer surface material 11 and the inner surface material 12 are easily separated or reused.

  In particular, since the insulation is covered with a bag that can prevent the passage of moisture, condensation occurs due to water vapor entering the interior, and a large number of air bubbles inside are blocked by water absorption, thereby insulating the insulation. Inconveniences such as deterioration can be avoided in advance.

  In addition, although the hard heat insulating material which does not have cushioning property was used for the heat insulating material of the heat insulating member 13 in the Example, you may use heat insulating materials, such as urethane foam which has cushioning property. In this case, if the heat insulating member 13 is formed slightly larger than the outer surface material 11 and the heat insulating member 13 is elastically deformed and press-fitted into the outer surface material 11, the cushion material 15 becomes unnecessary, and the assembly workability can be improved. , Production costs can be reduced.

  In addition, although the description has been made with a bag made of a synthetic resin made of a vinyl chloride sheet having elasticity, a vinyl sheet, or a polyethylene sheet as a material capable of preventing the passage of moisture, the material having an elasticity as a material capable of preventing the passage of moisture is chloride. You may use a vinyl sheet, a vinyl sheet, or a polyethylene sheet as it is without making a bag. In this case, the same effect can be obtained by covering and covering the heat insulating material with a sheet and sealing the opening of the sheet with an adhesive, an adhesive tape, heat welding, or the like.

  In the embodiment, the face material has been described with the outer surface material 11 and the inner surface material 12 constituting the heat insulating door 10, but the face material is an unillustrated outer box and inner box constituting the outer surface and the inner surface of the heat insulating box 2. There is no problem. In this case, since it is only necessary to sandwich the heat insulating member 13 between the outer box and the inner box, the outer box and inner box of the heat insulating box 2 and the heat insulating member 13 can be disassembled relatively easily as described above. As a result, the waste disposal or reuse of the heat insulating box 2 is facilitated, and the quality can be stabilized as compared with the case where the heat insulating material is integrally foamed between the face materials as in the conventional heat insulating structure. Equipment costs can also be reduced.

  FIG. 3 is an exploded perspective view of a heat insulating door 10 showing another embodiment of the present invention. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. In the freezer 1 as described in the above-described embodiment, the heat insulating door 10 includes an outer surface material 21 formed by bending a steel plate in a side U shape, and a flat inner surface material 12 attached so as to close the opening of the outer surface material 21. And a heat insulating material 23 housed in the outer surface material 21.

  The double-sided materials (outer surface material 21, inner surface material 12) are made of synthetic resin or steel plate, as described above. A handle 29 is provided near the upper portion of the outer surface material 21 (on the side of the heat insulating door 20), and the handle 29 is provided with a predetermined dimension embedded on the side of the heat insulating material 23. The heat insulating material 23 is made of foamed urethane foam and has a cushioning property. The periphery of the heat insulating material 23 is coated with a film capable of preventing the passage of moisture, and the outer diameter of the heat insulating material 23 is larger than the outer surface material 21 by a predetermined dimension.

  The heat insulating material 23 includes a front heat insulating material 23A, a middle front heat insulating material 23B, a middle rear heat insulating material 23C, and a rear heat insulating material 23D. The middle front heat insulating material 23B and the middle rear heat insulating material 23C have substantially the same thickness. The front heat insulating material 23A and the rear heat insulating material 23D have substantially the same thickness. The middle front heat insulating material 23B and the middle rear heat insulating material 23C are configured to be thicker than the front heat insulating material 23A and the rear heat insulating material 23D, and the front heat insulating material 23A and the middle front heat insulating material 23B have cutouts 23AA, 23BB is provided. Recessed portions of the handle 29 attached to the outer surface material 21 are inserted into the notches 23AA and 23BB. In this case, since the notch is not provided in the middle rear heat insulating material 23C and the rear heat insulating material 23D, the heat insulating effect of the heat insulating door 10 in the handle 29 portion is not significantly impaired.

  As a material for coating the periphery of the heat insulating material 23 with a film capable of preventing the passage of moisture, waterproofing using a paraffin wax excellent in water resistance and moisture resistance, a silicone resin or rubber excellent in water resistance and moisture resistance as a raw material. Agents and the like. By applying these waterproofing agent coatings to the entire heat insulating materials 23A, 23B, 23C, and 23D, passage of moisture and moisture into the heat insulating materials 23A, 23B, 23C, and 23D is prevented. It should be noted that the coating that can prevent the passage of moisture can be suitably prevented by allowing 1 mm to 2 mm to penetrate the heat insulating materials 23A, 23B, and 23C, and the inside of each heat insulating material 23A, 23B, 23C, and 23D. It is possible to more suitably prevent the passage of moisture when it is permeated throughout.

  Next, the heat insulating materials 23A, 23B, 23C, and 23D, the inner surface material 12, and the frame 16 are assembled in order in the opening of the outer surface material 21, and fastened with screws (not shown), and further a gasket attachment (not shown) is used. A gasket 18 is attached. At this time, the notches 23AA and 23BB of the front heat insulating material 23A and the middle front heat insulating material 23B are assembled in the opening of the outer surface material 21 at positions corresponding to the grips 29 attached to the outer surface material 21. And the breaker 30 (heat insulating material) is assembled | attached to the right-and-left opening part of the outer surface material 21, and it fastens and fixes with the screw which is not shown in figure. The heat insulating doors 10 and 10 and the heat insulating doors 20 and 20 assembled as described above are closed so that the opening 4 of the storage chamber 3 can be freely opened and closed.

  On the other hand, a drainage member 31 formed in a frame shape is provided around the outer surface material 21 and the inner surface material 12 (around the heat insulating material 23), and the lower side 32 of the drainage member 31 is on one side (the heat insulating door 10). The other side is inclined low and the other side is inclined high. The lower side 32 is provided with a drainage channel 32 </ b> A extending from one side to the other side, and this drainage channel 32 </ b> A is configured by a groove that is recessed downward in the longitudinal direction of both ends of the lower side 32. In addition, a drain hole (not shown) is provided at the downstream end (the pivotal support side of the heat insulating door 10) that is inclined downward of the drain channel 32A. That is, in the drainage channel 32 </ b> A provided on the lower side 32 of the drainage member 31, the water generated by the condensation between the outer surface material 21 and the inner surface material 12 is secured and drained from the drainage hole. If such a drainage channel 32A is provided between the outer surface material 11 and the inner surface material 12 of the heat insulating doors 10 and 20 of the first embodiment, the same effects as those of the second embodiment can be obtained.

  Thus, since the surface of the heat insulating material 23 is coated with a film capable of preventing the passage of moisture, the water is coated into the heat insulating material 23 by the film formed by condensation caused between the outer surface material 21 and the inner surface material 12. Water absorption can be suitably prevented. In particular, since the heat insulating material 23 itself is coated with a film that prevents the passage of moisture, the adhesion between the heat insulating material 23 and the double-sided material (the outer surface material 21 and the inner surface material 12) is also improved, and the rigidity of the heat insulating door 10 is improved. It can also be improved. In addition, it does not interfere even if the membrane | film | coat which can prevent passage of a water | moisture content is coated on the heat insulating material which comprises the heat insulation member 13 of Example 1. FIG. In this case, it is not necessary to use a synthetic resin bag made of a vinyl chloride sheet, a vinyl sheet or a polyethylene sheet having elasticity capable of preventing the passage of moisture, so that the assembly workability can be improved and the production can be improved. Cost can be reduced.

  Further, since the drainage member 31 is provided with a drainage channel 32A for discharging water generated between the outer surface material 21 and the inner surface material 12, dew condensation water generated between the outer surface material 21 and the inner surface material 12 by the drainage channel 32A. Etc. can be discharged smoothly from the drain hole. Thereby, it is possible to prevent inconveniences such as dripping water from the lower end of the heat insulating door 10 to wet clothes, a floor and the like. Moreover, since the heat insulating material 23 is only sandwiched between the outer surface material 21 and the inner surface material 12, the heat insulating door 10 and the heat insulating material 23 can be disassembled relatively easily. Thereby, separation disposal or reuse of the heat insulating door 10 is facilitated, and the quality is stabilized and the equipment cost can be reduced as compared with the case where the heat insulating material 23 is integrally foamed between the face materials.

  In the embodiment, the face material has been described with the outer face material 21 and the inner face material 12 constituting the heat insulating door 10, but the face material is an unillustrated outer box and inner box constituting the outer face and the inner face of the heat insulating box 2. There is no problem. In this case, since it is only necessary to sandwich the heat insulating material 23 between the outer box and the inner box, the outer box and inner box of the heat insulating box 2 and the heat insulating material 23 can be disassembled relatively easily as described above. As a result, the waste disposal or reuse of the heat insulating box 2 is facilitated, and the quality can be stabilized as compared with the case where the heat insulating material is integrally foamed between the face materials as in the conventional heat insulating structure. Equipment costs can also be reduced.

It is a perspective view of the commercial freezer equipped with the heat insulation structure of the present invention. (Example 1) It is a disassembled perspective view of the heat insulation door of the commercial freezer of FIG. It is a disassembled perspective view of another heat insulation door. (Example 2) It is a perspective view of the conventional heat insulation door. It is a disassembled perspective view of the heat insulation door of the same FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Freezer 2 Heat insulation box 3 Storage chamber 4 Opening 10 Heat insulation door 11 Outer surface material 12 Inner surface material 13 Heat insulation member 15 Cushion material 16 Frame 19 Handle 20 Heat insulation door 31 Drainage member 32 Lower side 32A Drainage channel

Claims (10)

  A heat insulating structure in which a heat insulating member formed by coating the surface of a pre-formed heat insulating material with a material capable of preventing the passage of moisture is disposed between face materials. In a heat insulating structure formed by arranging a pre-formed heat insulating material between face materials,
The heat insulation structure characterized by providing the drainage channel which discharges the water which generate | occur | produced between the said face materials.   The heat insulating structure according to claim 2, wherein the surface of the heat insulating material is coated with a material capable of preventing the passage of moisture.   4. The heat insulating structure according to claim 1, wherein the heat insulating material is enclosed in a bag capable of preventing the passage of moisture.   The heat insulating structure according to claim 1, 2 or 3, wherein the surface of the heat insulating material is coated with a film capable of preventing the passage of moisture.   The heat insulating structure according to claim 1, 2, 3, 4, or 5, wherein the heat insulating material has cushioning properties.   The heat insulating structure according to claim 1, 2, 3, 4, or 5, wherein the heat insulating material is made of closed-cell foamed polyurethane.   A heat insulating material according to claim 1, 2, 3, 4, 5, 6 or 7, wherein a cushioning material is interposed between the heat insulating material and the face material. Structure.   The said face material is the outer surface material and inner surface material which comprise the outer surface and inner surface of a heat insulation door, The claim 1, the claim 2, the claim 3, the claim 5, the claim 6, The heat insulation structure of Claim 7 or Claim 8.   The said face material is the outer box and inner box which comprise the outer surface and inner surface of a heat insulation box, The claim 1, the claim 2, the claim 3, the claim 5, the claim 6 characterized by the above-mentioned. The heat insulation structure of Claim 7 or Claim 8.

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