JP4120171B2 - Thermal insulation panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulating panel using a vacuum heat insulating material used for a refrigerator, a freezer car and the like.
[0002]
[Prior art]
Conventionally, urethane foam materials and styrene foam materials are mainly used as heat insulation materials in heat insulation panels used for heat insulation walls of mobile storages that require indoor temperature control, such as refrigeration, refrigeration, and cold cars. .
A conventional wall structure (heat insulating panel) in which a surface material and a heat insulating material are laminated has the following structure.
Structure A: Refer to FIG. 10 A panel structure in which a thin plate (surface material) 3 made of aluminum alloy (or a thin plate made of FRP) is attached to both side surfaces of the slab heat insulating material 5 with an adhesive 4. -See (a).
A panel structure in which a heat insulating material 5 'made of a slab material is stacked, bonded 4 to form a heat insulating layer, and a surface material 3 is bonded 4 on both sides thereof. (B) Reference In this forming method, the adhesive 4 is applied to the surface material 3 or the heat insulating materials 5 and 5 'made of a foam material, and then placed, and then pressed to bond the whole.
[0003]
Structure B: see FIG. 11 A structure in which an injection urethane material is injected into a panel by using FRP or a thin plate integrally formed of FRP and plywood as a surface material 3.
The surface material 3 is set in the surface plate press through the slab material 6 for setting the plate thickness interval of the panel, and then the frame material 7 having the finished dimension thickness is set around the panel. Urethane is injected into the gap from the injection nozzle 8 to form the urethane layer 5a. In this case, since urethane has self-adhesive properties, no adhesive is required.
Structure C: Refer to FIG. 12 A structure in which a urethane material for spraying is sprayed and filled, and then an inner plate is attached to form a heat insulating box.
A girder 9 having a heat insulation thickness is set inside a surface material 3 in which a prefabricated outer plate and a reinforcing material are laminated, and spraying urethane is sprayed into several layers by a spraying means 81.
If necessary, the surface material 3 on the other surface is attached by tapping 2 or an adhesive after shaving to a predetermined thickness.
[0004]
As described above, the structure of the heat insulating panel using the urethane foam as the heat insulating material has been described. However, when this heat insulating panel is used as the wall material of the vehicular heat insulating warehouse, the volume expansion in the warehouse rises as a required item.
Enlarging the volume in the warehouse means increasing the dimensions in the width and height directions, but the outer frame dimensions of the warehouse are regulated by law.
Therefore, in order to expand the interior dimensions using the outer frame dimensions as the regulation dimensions, it is necessary to reduce the thickness of the wall member (heat insulation panel).
[0005]
Here, in order to achieve the thinning of the panel thickness while maintaining the thermal insulation performance equal to the current state, the thermal insulation performance of the panel must be improved.
As a means for improving the heat insulating performance of the member, it is conceivable to use a vacuum heat insulating material having a lower thermal conductivity than the foamed plastic foam material.
[0006]
Then, the case where a vacuum heat insulating material is used for a heat insulation panel is demonstrated.
The structure of the vacuum heat insulating material is disclosed in Japanese Patent Laid-Open No. 8-303685.
(1) A vacuum heat insulating material is used instead of the slab heat insulating material shown in the above structure A. Refer to FIG. 13. The vacuum heat insulating material 10 is arranged between the surface materials 3 via the slab material 13. At this time, the small slab material 16 is squeezed and installed so as not to damage the seal portion 15 of the vacuum heat insulating material 10.
This heat insulating panel has a large number of layers and parts, and the structure becomes complicated.
[0007]
(2) In the case of using a vacuum heat insulating material in the panel using the injected urethane shown in the above structures B and C. Since the vacuum heat insulating material 10 is directly bonded to the surface material 3, a vacuum is generated by twisting due to vibration of the vehicle. The film to hold | maintain cut | disconnected and there existed a problem that the heat insulation effect was impaired.
Or when attaching a mounting bracket etc. to a wall surface, there exists a possibility of breaking the film of the vacuum heat insulating material 10. FIG.
[0008]
[Problems to be solved by the invention]
Therefore, in order to solve the above problems, the present invention is to provide a panel having a simple structure, which can maintain the vacuum state of the vacuum heat insulating material for a long period of time and has a reliable heat insulating effect.
[0009]
[Means for solving problems]
The inner plate for fixing the struts at appropriate intervals, the outer plate for fixing the struts at appropriate intervals, and the vacuum heat insulating material sandwiched between the inner plate struts and the outer plate struts and disposed at appropriate intervals The heat insulation panel formed of the foamed urethane foam filled in the gap between the inner plate and the outer plate is disposed by superposing the end of the vacuum heat insulating material on the adjacent vacuum heat insulating material, plate, a portion of the strut which is fixed to the outer plate include a configuration sandwiching the overlapping portion of the end portion of the vacuum heat insulating material.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Reference example 1
FIG. 1 is a cross-sectional view of a heat insulating panel of Reference Example 1, and FIG. The heat insulating panel 100 has a configuration in which a heat insulating member is sandwiched between an inner plate 60a and an outer plate 60b. The inner plate 60a and the outer plate 60b are made of a thin plate made of an aluminum alloy or a plastic composite material. The heat insulating member includes a foamed urethane foam 80 and a vacuum heat insulating material 50 disposed in the foam.
[0012]
The vacuum heat insulating material 50 covers a heat insulating core material 51 made of a plastic communication foam material such as a urethane communication foam material or a styrene communication foam material, and the heat insulation core material 51, and the periphery is a seal portion 530. And a gas adsorbent 55 that adsorbs and fixes the gas entering the vacuum heat insulating material 50 that has been decompressed. Examples of the heat insulating core material include an organic-based continuous foaming urethane foam, and other resin foaming foams (polystyrene, polypropylene, phenol, urea, ABS, vinyl chloride, nylon, ethylene-vinyl acetate, rubber, etc.), and inorganic materials. Foamed perlite, silica balloon, glass microballoon, silica, hydrous silicic acid, calcium silicate, diatomaceous earth, methylated silicic acid, alumina carbonate, carbon foam and fibrous wool (glass wool, asbestos, asbestos, ceramic fiber, cotton wool, polyester wool) , Silica alumina wool, etc.) can be used.
[0013]
The vacuum heat insulating material 50 constitutes a heat insulating panel.
In this embodiment, the inner plate 60a and the outer plate 60b which are the surface materials are formed of a thin plate made of an aluminum alloy, and the vacuum heat insulating material 50 is disposed between the inner plate 60a and the outer plate 60b via the support column 500.
The column 500 is a rod-shaped body having a round cross-section and a corner (triangle, square, pentagon, etc.) formed of a heat insulating material such as urethane foam or styrene foam, and the adhesive 4 is applied to the inner plate 60a and the outer plate 60b. It is pasted with.
[0014]
Adhesives include thermoplastic adhesives (vinyl acetate, acrylic, polyamide, polyurethane, etc.), thermosetting adhesives (amino, urea, melamine, phenol, resorcinol, xylene, furan) , Epoxy, acrylic, unsaturated polyester, etc.), hot-melt adhesives (including reactive curing types), rubber adhesives, cyanoacrylate adhesives, synthetic water-soluble adhesives, emulsion adhesives, liquids A polymer adhesive or the like can be used.
In particular, in consideration of temperature increase (about 80 ° C. to 90 ° C.) due to outdoor solar radiation, heat-resistant thermosetting urethane-based, epoxy-based adhesives and reaction-curable hot-melt adhesives are effective.
Among the above adhesives, a solvent-containing type is preferable because the solvent may dissolve the plastic foam or the solvent may gradually scatter after adhesion to cause adhesive peeling. .
Alternatively, a double-sided tape may be used instead of the adhesive.
[0015]
The support column 500 is a support member for the vacuum heat insulating material 50 in which the vacuum heat insulating material 50 is disposed at appropriate intervals from the inner and outer plates 60a and 60b. That is, the height dimension t1 of the column 500 is set to a half of the dimension obtained by subtracting the thickness dimension t of the vacuum heat insulating material 50 from the desired panel thickness T when the surface materials 60a and 60b are removed. Thus, the vacuum heat insulating material 50 is disposed in the central portion of the thickness of the heat insulating panel 100.
The arrangement interval L in the longitudinal direction of the panels 100 of the columns 500 made of heat insulating material is shorter than the dimension L10 in the longitudinal direction of the vacuum heat insulating material 50. In addition, the arrangement interval N in the panel width direction of the support columns 500 is shorter than the dimension N10 in the width direction of the vacuum heat insulating material 50.
[0016]
Thus, the vacuum heat insulating material 50 is mounted on the support | pillar 500 adhere | attached on the inner board 60a so that the seal parts 530 of the adjacent vacuum heat insulating material 50 may not interfere. At this time, by applying an adhesive to the upper surface of each column 500, the vacuum heat insulating material 50 is supported by the column 500 and is installed at an appropriate interval. Further, the outer plate 60b having the column 500 bonded thereto is similarly placed on the upper surface of the vacuum heat insulating material 50. Also in this case, the column 500 of the outer plate 60 b is bonded and fixed on the vacuum heat insulating material 50 by applying an adhesive to the upper surface of the column 500. Thus, the vacuum heat insulating material 50 disposed via the support column 500 with respect to the inner and outer plates 60a and 60b has a relationship in which the interval between the support columns 500 is L <L10 and N <N10. It is supported by a plurality of columns 500 and is arranged at the center portion of the panel plate thickness.
[0017]
The gap between the inner plate 60a and the outer plate 60b, the gap 70 surrounded by the inner plate 60a, the column 500, and the vacuum heat insulating material 50, and the gap 70 surrounded by the outer plate 60b, the column 500, and the vacuum heat insulating material 50. Inject urethane foam inside. At this time, since the upper and lower surfaces of the vacuum heat insulating material 50 are supported by the support column 500 and are fixed at positions appropriately separated from the inner and outer plates 60a and 60b, the vacuum heat insulating material 50 is not moved by the injection pressure of the urethane foam.
The injected urethane foam is foamed to fill the gap as a foamed urethane foam 80. This foamed urethane foam 80 is bonded to the inner and outer plates 60a and 60b, the column 500, and the vacuum heat insulating material 50 by self-adhesiveness.
[0018]
Moreover, the support | pillar fixed to the inner board 60a or the outer board 60b can also be made into the magnitude | size of the vacuum heat insulating material 50. FIG. ... See FIG. 3 The cross-sectional shape of the column 500A may be substantially the same as the dimension L10 in the longitudinal direction and the dimension N10 in the width direction of the vacuum heat insulating material 50, or a part thereof may be slightly smaller. The heat insulating panel 100A having this configuration can be widely formed without the injection space 75 being blocked by the support column in the step of injecting the urethane foam, and the injection operation becomes easy.
[0019]
The heat insulating panel 100 or the heat insulating panel 100A having such a configuration is easy to arrange the vacuum heat insulating material 50 and can be densely arranged, so that the use area of the vacuum heat insulating material can be improved. Moreover, the vacuum heat insulating material 50 can be arrange | positioned in the center part of the plate | board thickness of the panel 100 by making the height dimension t1 of the support | pillar 500 constant. If the heat insulation panel 100, 100A constitutes a warehouse wall, the vibration or twist of the vehicle does not directly affect the vacuum heat insulating material 50, and the risk of breakage of the heat insulation effect due to the cutting of the vacuum holding film can be avoided.
Further, the slab material for protecting the seal portion as in the conventional heat insulation panel configuration is not required, and the number of layers and parts are small, and the structure is simple.
As described above, the heat insulating panels 100 and 100A have no complicated structure, the vacuum heat insulating material 50 can be easily disposed at a fixed position, the use area ratio of the vacuum heat insulating material can be improved, and the number of bonding steps can be reduced. , And the injection process can be facilitated.
[0020]
Reference example 2
This reference example demonstrates the case where members, such as an indoor lamp and piping, are installed in a heat insulation panel. The column height of the member arrangement portion is made higher than the column height of the other portion. ..See FIG. In addition, the same code | symbol is attached | subjected to the member of the same structure as the reference example 1, and the description is abbreviate | omitted. The height dimension t2 of the support column 540 provided on the inner plate 60a provided in the vicinity of the member installation location of the heat insulation panel 150 is set higher than the height dimension t1 of the support column 500 provided in other portions. The height dimension t2 of the support column 540 is set to be larger than the depth dimension t4 of the recessed portion 150A formed at the member placement location (height dimension t2> depth dimension t4). And the height dimension t3 of the support | pillar 550 arrange | positioned at the outer plate | board 60b corresponding to the support | pillar 540 is set low. The struts 500 disposed in other portions are disposed on the inner plate 60a and the outer plate 60b with a height dimension t1.
[0021]
The vacuum heat insulating material 50 is placed on and bonded to the support column thus installed.
At this time, the vacuum heat insulating material 50 disposed between the column 540 and the column 550 is disposed close to the outer plate 60 b, and the vacuum heat insulating material 50 disposed between the columns 500 is the inner plate 60 a of the heat insulating panel 150. And the outer plate 60b.
[0022]
The gap between the inner plate 60a and the outer plate 60b configured as described above, and the gap surrounded by the inner plate 60a, the columns 500 and 540, and the vacuum heat insulating material 50, the outer plate 60b, the columns 500 and 550, and the vacuum heat insulating material 50 Urethane foam is injected into the gap surrounded by the foamed urethane foam 80 to fill the gap.
Then, a recess 150A having a desired depth t4 is formed at the member disposition location.
At this time, since the vacuum heat insulating material 50 is disposed at a position deeper than the recess 150A with respect to the inner plate 60a, the vacuum heat insulating material 50 is not damaged by the formation of the groove.
[0023]
Also in this case, the heat insulation panel 150 is easy to arrange the vacuum heat insulating material 50 and can be arranged densely. Furthermore, by adjusting the height of the column at the location where the member is disposed, it is possible to prevent damage to the vacuum heat insulating material 50 due to the member placement operation, and the placement position can be easily adjusted, and the placement of the member mounting portion can be performed. It becomes easy.
[0024]
Furthermore, the arrangement | positioning density of a vacuum heat insulating material can be raised by overlapping the edge part of an adjacent vacuum heat insulating material like the Example shown in FIG. That is, the first vacuum heat insulating material 50a and the third vacuum heat insulating material 50c are supported by the support column 570 with respect to the inner plate 60a and are disposed at the same position. The second vacuum heat insulating material 50b is placed with one end placed on the end of the first vacuum heat insulating material 50a and the other end placed on the end of the third vacuum heat insulating material 50c. Each vacuum heat insulating material edge part adhere | attaches with an adhesive agent, or adhere | attaches via a double-sided adhesive tape. Alternatively, it can be simply polymerized and fixed by self-adhesion of the injected urethane. Between the outer plate 60b, support columns 580 are disposed on the first and third vacuum heat insulating materials 50a and 50c, and support columns 590 are disposed on the second vacuum heat insulating material 50b.
[0025]
The heat insulating panel 100 </ b> B having this configuration can be provided with a vacuum heat insulating material without worrying about the presence of the seal portion 530. Further, the columns 570 and 590 of the overlapping portion at the end of the vacuum heat insulating material can be used as the columns of the first and third vacuum heat insulating materials 50a and 50c and the column of the second vacuum heat insulating material 50b, respectively. The number can be reduced, and the urethane injection gap can be widened accordingly.
Moreover, since the upper and lower sides of the vacuum heat insulating material are completely separated, if the injection ports for the injection urethane are provided on the upper and lower sides, respectively, the periphery of the injection urethane can be improved as compared with the case where one injection port is provided for vertical communication. .
[0026]
This example will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the member of the same structure as the reference example 1, and the description is abbreviate | omitted. Form state of this has changed the shape of the vacuum insulation material. ... See FIGS. 6 and 7 In the vacuum heat insulating material 50A, a concave groove 520 is provided at a position corresponding to the seal portion 530 of the core material 51A, and the seal portion 530 is accommodated in the concave groove. For example, as shown in FIG. 7, the core material 51 </ b> A is a rectangular plate having a thickness dimension of h and a side surface 515. A concave groove 520 is drilled in the side surface 515 of the core material 51A. The core material 51A having this configuration is covered with a plastic film 53 having a margin e, and the sealing portion 530 is formed by sealing three edges. Then, the whole is housed in a vacuum chamber or the like and subjected to deaeration treatment, and the remaining one side is sealed in a state where the inside of the film is decompressed to form a seal portion 530. At this time, the plastic film 53 covers the upper and lower surfaces and the side surfaces 515 of the core material 51A, and the vacuum insulating material 50A accommodated in the concave groove 520 is formed in the seal portion 530 of the side wall 535.
[0027]
The vacuum heat insulating material 50A constitutes a heat insulating panel.
Reference Example 3 ... See FIG.
A vacuum heat insulating material 50A is disposed between the inner plate 60a and the outer plate 60b via a support column 500. In the vacuum heat insulating material 50A, since the seal portion 530 formed on the side wall is accommodated in the concave groove, the adjacent vacuum heat insulating materials 50A are disposed with the side wall 535 in contact with each other. At this time, there is a method in which an adhesive is applied as an adhering means between the side walls 535 and adjoining vacuum heat insulating materials 50A are adhering to each other, or a method of adhering and adhering via a double-sided adhesive tape. It is also possible to inject and adhere urethane having self-adhesiveness after being connected and arranged.
[0028]
Then, urethane is injected into a gap formed by the support column 500 and the vacuum heat insulating material 50A. In this case, since the vacuum heat insulating material 50A is connected without a gap, the heat insulating panel 100C is partitioned in the thickness direction, and the gaps formed are the inner gap 70A on the inner plate 60a side and the outer gap on the outer plate 60b side. 70B is formed. By injecting urethane separately into the inner gap 70A and the outer gap 70B, an inner urethane layer and an outer urethane layer are formed, and the filling efficiency of the injected urethane is improved.
The heat insulating panel 100C is easy to handle the vacuum heat insulating material because the seal portion 530 of the vacuum heat insulating material 50A does not protrude from the side wall 535, and can be disposed in contact with the adjacent vacuum heat insulating material 50A. A panel with good insulation efficiency can be constructed by increasing the density.
[0029]
Reference Example 4 ... See FIG. 9 This heat insulating panel 100D uses a column 500A having a substantially the same cross-sectional shape as the vacuum heat insulating material 50A as a part of the column. Further, a gap slab material 500D is disposed between the adjacent vacuum heat insulating materials 50A. At this time, since the seal portion does not protrude from the side wall 535 of the vacuum heat insulating material 50A, the gap slab material 500D is formed by bonding and fixing a rectangular body having a plate thickness dimension of the vacuum heat insulating material 50A with an adhesive or a double-sided adhesive tape. Yes. In this heat insulating panel 100D, since the cross-sectional shape of the support column 500A, which is a support member for the vacuum heat insulating material 50A, is substantially the same as that of the vacuum heat insulating material 50A, the area of the urethane injection gap is reduced and reliable filling is achieved. The Similarly to Example 1 in FIG. 8, if the inner and outer urethane are separately injected, the filling efficiency of the injected urethane is improved.
[0030]
【The invention's effect】
As described above, the heat insulating panel of the present invention makes it easy to dispose the vacuum heat insulating material, can increase the usage area ratio of the vacuum heat insulating material, and reduce the panel thickness by improving the heat insulating efficiency. Can be achieved.
Furthermore, the arrangement position of the vacuum heat insulating material can be easily adjusted, and reliable long-term maintenance of the heat insulating effect can be achieved.
[Brief description of the drawings]
1 is a cross-sectional view of a heat insulating panel of Reference Example 1. FIG.
FIG. 2 is a configuration explanatory view of a heat insulating panel.
FIG. 3 is a cross-sectional view of a heat insulating panel in which the shape of the support is changed.
4 is a cross-sectional view of a heat insulation panel of Reference Example 2. FIG.
Figure 5 is a cross-sectional view of the insulating panel showing the actual施例.
FIG. 6 is a cross-sectional view showing another embodiment of the vacuum heat insulating material.
FIG. 7 is a configuration explanatory view of a vacuum heat insulating material.
8 is a cross-sectional view of a heat insulation panel of Reference Example 3. FIG.
FIG. 9 is a cross-sectional view of a heat insulation panel showing another reference example.
FIG. 10 is a cross-sectional view showing an example of a conventional heat insulation panel.
FIG. 11 is an explanatory view showing another embodiment of a conventional heat insulation panel.
FIG. 12 is an explanatory view showing another embodiment of a conventional heat insulation panel.
FIG. 13 is a cross-sectional view of a heat insulating panel using a conventional vacuum heat insulating material.
[Explanation of symbols]
50, 50A Vacuum heat insulating material 51, 51A Core material 53 Synthetic resin film 55 Gas adsorbent 60a Inner plate 60b Outer plate 70, 75 Gap 70A Inner urethane layer 70B Outer urethane layer 80 Urethane foam 100, 100A, 100B, 100C, 100D, 150 heat insulation panel 150A recessed part 500, 500A, 540, 550, 570.580, 590 support 530 seal part

Claims (2)

An inner plate for fixing the struts at appropriate intervals, an outer plate for fixing the struts at appropriate intervals, a vacuum heat insulating material sandwiched between the inner plate struts and the outer plate struts, an inner plate and an outer plate, In the heat insulation panel formed with foamed urethane foam filled in the gap between
The vacuum heat insulating material is disposed by overlapping the end portion of the adjacent vacuum heat insulating material, and a part of the column fixed to the inner plate and the outer plate sandwiches the overlapping portion of the end portion of the vacuum heat insulating material. Insulation panel.   The heat insulation panel according to claim 1, wherein the vacuum heat insulating material has a groove at a position corresponding to the seal portion of the core material, and the seal portion is accommodated in the groove.

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