JPH043793Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a foam laminated sheet that is applied to building structures, etc., and can be selectively used for heat transfer/insulation, especially as a snow melting sheet or a concrete curing sheet. The present invention relates to a heat transfer/insulation foam laminate sheet.

[Conventional technology]

BACKGROUND ART Snow melting sheets have been well known as one of the means for removing snow accumulated on roofs in snowy areas. Examples include a plate material with heater wires arranged thereon, and a snow melting sheet made of resin powder as a base material mixed with powder capable of resistive heating or powder capable of dielectric heating.

[Problem that the invention attempts to solve]

However, although this type of snow melting sheet has excellent snow melting effects, it is relatively expensive.
In addition, in order to maintain the snow melting effect, it is necessary to apply electricity for a long time, which tends to result in high running costs, and it is not something that anyone can easily implement.Therefore, there has been a desire for something that can obtain a better snow melting effect at a lower cost.

On the other hand, as is the case with the above-mentioned conventional technology, many of the sheets conventionally applied to building structures, such as heat transfer sheets and heat insulation sheets, have differences in material and structure such as single layer or lamination, but as a whole, As these materials have the same functionality, it has been pointed out that there is a limit to their range of applications, and expanding their range of applications has been an issue.

Therefore, the purpose of the present invention is to provide a heat transfer sheet that can be used as a heat transfer sheet such as a snow melting sheet that is inexpensive and has a good snow melting effect, and can also be selectively used as a heat insulation sheet such as a concrete curing sheet. /Providing a heat insulating sheet that has a simple structure, light weight, easy handling, and low cost heat transfer.
To provide insulation sheets.

[Means for solving problems]

This invention was created in view of the above points,
It has the following technical means.

That is, in a foamed sheet formed by laminating sheets on a foamed base material 10 such as polyurethane foam of a required thickness, the foamed base material 10 has a closed cell structure having high heat insulation properties, and the foamed base material 10 has In order to form the grooves 11 for circulating fluid when used as a heat transfer sheet and to improve heat conduction of the fluid, the sheet laminated on the foam base material 10 is an aluminum sheet containing at least an aluminum material. This is what I did.

[Effect]

With the above configuration, when used as a heat transfer sheet, for example, a snow melting sheet, the foam base material 10
Lay it on the roof with the bottom facing down and supply hot water.
Due to the high heat insulation properties of the foam base material 10 having a closed cell structure, the hot water circulating in the grooves 11 of the foam base material 10 is prevented from being cooled by cold air as much as possible, and the heat of the hot water is transferred to the aluminum sheet with high thermal conductivity. 12 allows for efficient conduction to the laminated layers, resulting in a good snow melting effect. Also, when used as a heat insulating sheet, for example as a concrete curing sheet, aluminum sheet 1
2 is used so that it is in contact with the concrete surface, and the concrete surface is isolated from the outside air to prevent the occurrence of cracks due to drying of the concrete. It retains heat, prevents water in concrete from freezing, and allows for good concrete hardening.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

The present invention can be selectively used as a heat transfer sheet or a heat insulating sheet, but in this embodiment, the case where the heat transfer sheet is used for snow melting will be explained as an example.

In FIG. 1, numeral 1 indicates the heat transfer/insulation foam laminate sheet of the present invention. As shown in FIGS. 1 and 4, the heat transfer/insulating foam laminate sheet 1 is configured so that it can be arranged in a plurality of stages as required, and in this example, a case in which it is arranged in three stages is shown. . Each of the heat transfer/insulating foam laminate sheets 1 is configured to obtain the heat necessary for snow melting by introducing hot water that is heated and kept warm from outside.

That is, water from the water supply 2 is stored in a water storage tank 3, and this water is transferred to any boiler 4 such as an electric hot water boiler or an oil boiler.
The heat transfer/insulation foam laminate sheet 1 is configured to heat the water and store it in a heat insulating tank 5, and introduce hot water with a pump 6 as necessary. 7.

Therefore, hot water is supplied and circulated through the flow path 7, and the heat of the hot water is conducted to the snow accumulated on the sheet 1, melting the snow. The hot water cooled by heat exchange with the snow is returned to the water storage tank 3, reheated, and reused.

The above configuration is a well-known technology, but the present invention is configured as follows in order to be able to selectively use it as a heat transfer sheet such as a snow melting sheet and a heat insulation sheet such as a concrete curing sheet that can obtain a good snow melting effect. This is what I did.

That is, as shown in FIG. 2, first, a foam base material 10 having a required thickness and having high heat insulation properties, such as hard foamed urethane having a closed cell structure, is provided, and hot water flow paths 7 are formed in the foam base material 10. Grooves 11 are formed on one side of the foam base material 10 to allow hot water to circulate through the foam base material 10, and in order to enhance the snow melting effect, the cooling degree of this warm water due to cold air is minimized as much as possible. There is.

Then, the foamed base material 10 prevents hot water from leaking and efficiently conducts the heat of this hot water.
Aluminum sheets 12 approximately the same size as the foam base material 10 are laminated to enhance the snow melting effect. In this case, as described above, the adhesive is attached to the foam base material 10 so as to completely cover the groove 11 so that hot water does not leak out. The aluminum sheet 12 preferably has a large proportion of aluminum, which has excellent thermal conductivity, such as a mesh base material impregnated with molten aluminum and solidified. For example, aluminum powder is deposited on a plastic film such as polypropylene. Alternatively, it may be formed by laminating aluminum sheets and forming a laminate. As described above, the present invention has a foam laminated structure in which an aluminum sheet 12 having high thermal conductivity is laminated on a foam base material 10 having high thermal insulation properties, and it can be used to insulate concrete curing sheets etc. without using fluids such as hot water. It can be used as a sheet, and by circulating a fluid such as hot water, it can also be used as a snow melting sheet or a heat transfer sheet.

Now, when this heat transfer/insulation foam laminate sheet 1 is used in a continuous manner as shown in FIG. They may be connected in a state where hot water can be communicated.

Now, when using this heat transfer/insulation foam laminate sheet 1 for snow melting, as shown in Fig.
Lay it on top of 9. In this case, the foam base material 10 is installed so as to be located on the lower surface as shown in the figure. This is because the thermal conductivity of hot water is greater on the aluminum sheet 12 side shown by arrow A in FIG.

Then, a hot water circulation pipe 18 is connected to each of the hot water inflow part 15 and the hot water outflow part 16 of the heat transfer/insulation foam laminate sheet 1 located at both ends. In this embodiment, an example in which a plurality of foamed laminated sheets 1 are sequentially connected so that hot water can be communicated with each other is shown, and the foamed laminated sheets 1
It is also possible to independently circulate hot water in each of them.

Further, as shown in FIG. 4, it is also possible to fix the snow melting sheet 1 in an overhanging manner using the fixing member 17 as a whole, if necessary.

The operation will be explained below.

Heat transfer with pump/hot water outlet 1 on insulation sheet 1
When hot water is supplied from 5, the degree of cooling caused by cold air of the warm water surrounded by the foam base material 10 having a closed cell structure with high heat insulation properties is kept as small as possible.

That is, heat exchange of heat from the hot water due to causes other than snow melting is prevented as much as possible. While the foam base material 10 has low thermal conductivity, the aluminum sheet 12 has high thermal conductivity, so the heat of the hot water is transferred as shown by arrow A in Figure 2.
As shown in the figure, more conduction occurs to the side of the aluminum sheet 12 that is in contact with the snow. Therefore, the degree of heat exchange between the heat of the hot water and the cold heat of the snow increases, resulting in a good snow melting effect. The cooled hot water is returned to water storage tank 3 and boiler 4.
Since it is reused after passing through the process, the above-mentioned snow melting effect can be continuously obtained.

In addition, by using cheap energy such as late-night electricity,
Low running costs can be achieved by storing hot water for a predetermined amount of time depending on the required snow melting time.

As mentioned above, this example shows the case where it is used as a snow melting sheet, that is, as a heat transfer sheet, but for example, when it is used as a concrete curing sheet, that is, a heat insulating sheet, it is possible to use concrete materials that are most suitable for curing concrete. By adjusting the temperature of hot water according to the conditions, it is possible to prevent the water in the concrete material from freezing in the winter and to prevent excessive evaporation of the water in the concrete material in the summer, resulting in good hardening of the concrete. .

[Effect of idea]

As can be seen from the above, the present invention allows fluid to be further circulated through a foam laminated sheet made by laminating an aluminum sheet with high thermal conductivity on a foam base material with a closed cell structure having high heat insulation properties. It is designed to achieve a high degree of heat exchange between heat and the heat to be transferred, and can be used selectively as a heat transfer sheet or a heat insulation sheet, making a single sheet versatile. .

However, when used selectively for each purpose, for example, when used as a heat transfer sheet for snow melting, it is inexpensive and has a good snow melting effect, and when used as a heat insulating sheet, for example as a concrete curing sheet, it can be used to melt concrete. Suppresses excessive evaporation of water in the material and prevents surface cracks.
In addition, during cold seasons, if the material is used as a heat transfer sheet and hot water is circulated, the water in the material can be properly prevented from freezing and the concrete can be hardened effectively. As a result, the quality and reliability of concrete can be improved.

In addition, as mentioned above, it does not require particularly advanced technology and has a simple structure, so it is easy to manufacture and inexpensive, and in addition, it is light in weight, so it can be easily handled during installation work, etc. It has many practical advantages.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams showing embodiments of the present invention. Figure 1 is a diagram showing the snow melting sheet and hot water circulation path, and Figure 2 is a diagram showing the snow melting sheet shown in Figure 1. X
3 is a sectional view taken along the line Y-Y, and FIG. 4 is a perspective view showing the state of use of the snow melting sheet including a partially broken snow melting sheet. Insulating foam laminated sheet, 1
0...Foamed base material, 11...Groove, 12...Aluminum sheet.

Claims (1)

[Scope of utility model registration request] In a foamed laminated sheet formed by laminating sheets on a foamed base material 10 such as polyurethane foam of a required thickness, the foamed base material 10 has a closed cell structure with high heat insulation properties, and the foamed base material 10 has The foam base material 10 is used to form grooves 11 for circulating a fluid for use as a thermal sheet, and to ensure good heat exchange between the fluid and the heat transfer target.
A heat transfer/insulation foam laminate sheet characterized in that the sheet laminated on the substrate is an aluminum sheet 12.