JPS593343Y2 - Heat-absorbing material for attaching to solar heating facilities - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heat-absorbing material that can be attached to solar heating objects.

Conventionally, in solar heating devices, the heat collecting surface has been painted black, or if the heat collecting surface is metal, the surface has been blackened by surface treatment.

For example, black chromium is known for chromium, and copper oxide black is known for copper.

However, when using such a method, various processing conditions must be changed depending on the shape of the heat collecting surface, leading to problems such as unstable quality and increased costs.

Therefore, the inventors of the present invention believe that the above-mentioned problems can be solved at once by abandoning the idea of directly applying treatment to the heat-collecting surface of solar thermal devices and pasting a pre-prepared heat-absorbing material on the heat-collecting surface. We focused on this and completed this idea.

Therefore, the object of this invention is to provide a heat-absorbing material that has good heat-absorbing efficiency, excellent durability, and is convenient for attachment to solar heat utilization materials.

The heat-absorbing material for attachment to solar heat-utilizing objects that achieves the above purpose is made of a thin aluminum plate with a solar heat selective absorption film formed on one side, that surface coated with a silicone or fluororesin coating, and the other side coated with a silicone or fluororesin coating. A pressure-sensitive adhesive layer is formed on the surface of the adhesive layer, and the surface thereof is covered with a release paper.

In this specification, aluminum foil is also included in the aluminum thin plate material.

Examples of solar heat utilization devices include solar heat collectors, solar water heaters,
Examples include solar hot water roofs, solar heat storage bodies or walls.

A method for forming a solar heat selective absorption film on one side of an aluminum thin plate is, for example, to form an adhesive layer on one side of the aluminum thin plate in advance, and then anodize the other side to form a porous oxide film. However, a suitable method is to obtain a black solar heat selective absorption film by treating the oxide film in an electrolytic solution containing a metal salt to precipitate metal in the pores of the oxide film.

This invention will be explained below with reference to the drawings.

1 and 2 show the heat absorbing material according to this invention.

In the figure, 1 is a solar heat selective absorption film formed on one side of a long aluminum thin plate material 2, and has a solar absorption rate α of 0.85 or more and an emissivity ε of 0.3 or less.

14 is a silicone coating coated on the surface of the solar heat selective absorption membrane 1, and it is preferable to further apply a protective film such as polyethylene on the surface to prevent scratches and stains, which can be peeled off during use. .

Reference numeral 3 denotes an adhesive layer formed on the other side of the aluminum thin plate material 2, and the surface thereof is covered with a release paper 4.

As shown in FIG. 1, the heat absorbing material is wound into a coil and stored and transported.

Then, this is cut appropriately depending on the solar heat utilization material to be adhered, and the release paper 4 is peeled off before use.

Figure 3 shows the heat absorbing material A according to this invention with its adhesive layer 3.
The figure shows the state in which it is attached to the solar heat storage body B.

The heat storage body B is made up of a large number of latent heat storage material enclosures 6 made by Binh Pong Institute of Technology scattered within the concrete 5.

FIG. 4 shows a state in which the heat absorbing material A is attached to a synthetic resin tank D of a wall-mounted solar water heater C.

The tank D is housed in an aluminum case 8 equipped with a transparent glass plate 7 on the front so that sunlight S can enter the tank.

A heat insulating material 9 is provided between the remaining five sides of the tank D and the case 8.
is filled.

A mounting bracket 10 is fixed to the back surface of the case 8.

The outer wall surface 11 of the building is equipped with a water heater mounting frame 12, and an L-shaped receiving bracket 13 is fixed to this frame when viewed from the side in correspondence with the mounting bracket 11. The water heater C is attached to the wall by hanging the mounting bracket 11 from above.

Since the heat absorbing material according to this invention has the above-described configuration, the same type of heat absorbing material can be used even if the solar heat utilization materials are various.

Therefore, the quality of the heat absorbing material can be maintained stably.

In addition, since it is only necessary to cut the heat-absorbing material prepared in advance and attach it to the required part of the solar heat-utilizing material, it is possible to obtain a heat-absorbing surface at a lower cost than applying surface treatment directly to the solar heat-utilizing material. .

In addition, adsorbing a heat absorbing material to a hot water tank or other object that needs to be kept warm will have a heat retention effect, so the range of solar heat utilization can be expanded, and solar heat selective absorption can also be applied to synthetic resin products for which it is not possible to directly form a solar heat selective absorption film. It has the advantage of being equipped with an absorbent membrane.

Moreover, since the heat absorbing material is mainly composed of a thin aluminum plate material 2 with a solar heat selective absorption film 1 formed on one side, the heat absorbing efficiency of solar heat is extremely high.

In addition, since the surface of the solar heat selective absorption film 1 is coated with silicone or fluororesin coating film 14, it can withstand long-term use outside the solar heat utilization material attached to the heat absorbing material.

Furthermore, since the adhesive layer 3 is formed on the other side and the surface is covered with a release paper 4, if the release paper 4 is peeled off during pasting, the adhesive layer 3 will be exposed and the solar heating The heat absorbing material can be easily and quickly fixed to the heat collecting surface of the

[Brief explanation of the drawing]

Figure 1 is a perspective view of this device with the silicon coating film, solar heat selective absorption film, aluminum thin plate material and adhesive layer partially peeled off, and Figure 2 is an enlarged sectional view taken along line II-II in Figure 1. , Figure 3 is a horizontal cross-sectional view showing this device attached to a solar heat storage body, and Figure 4 is a vertical cross-sectional view showing this device attached to a synthetic resin tank of a wall-mounted solar water heater. FIG. 1...Solar heat selective absorption film, 2...Aluminum thin plate material, 3...Adhesive layer, 4...
...Release paper, 14...Silicon or fluororesin coating film.

Claims (1)

[Scope of utility model registration request] A solar heat selective absorption film 1 is formed on one side of an aluminum thin plate material 2, and that surface is coated with a silicone or fluororesin coating film 14, and an adhesive layer 3 is formed on the other side, and the surface is separated. A heat-absorbing agent for pasting onto a solar heating object covered with Pattern 4.