JPS613953A - Solar heat collecting device - Google Patents

Abstract

PURPOSE:To make complicated piping unnecessary and permit effecient heat collection by a method wherein a light absorbing exothermal panel is arranged at the end of an optical fiber permitting the incidence of collected light beams from the focal point of the solar light collecting device so as to be intersected with the optical axis of the light beams projected from the optical fiber. CONSTITUTION:The optical fiber 3 is provided so that the collected light beams can be projected thereinto from the focal point 2 of the solar light collecting device A or a Fresnel lens, for example, and the light absorbing exothermal panel 4 is arranged at the end of the other terminal 3B of the optical fiber 3 so as to be intersected with the optical axis of light beams projected from the optical fiber 3. The light absorbing exothermal panel 4 is consisting of a panel body effecting heat radiation after receiving the solar beams S' and made of a heat resistant black panel or the like. According to such device, complicated piping may be made unnecessary and efficient heat collection may be effected.

Description

[Detailed description of the invention] Industrial applications This invention relates to a solar heat collector.

2. Description of the Related Art Conventionally, solar water heaters have been cited as a typical device that can utilize solar heat.

These solar water heaters supply water to a light-receiving plate placed outdoors, store the heated water in a hot water tank, or connect the light-receiving plate and a separate hot water storage tank using a heat medium, such as a heat pump. Some devices are known that transfer a heat to warm water in a hot water tank.

Problems with the Prior Art However, in conventional solar water heaters, it is necessary to directly guide water or a heat medium to the light receiving plate that receives sunlight, which makes piping construction very troublesome. In the case of so-called pump-type water heaters, the hot water tank is placed on the roof or the like together with the light receiving plate, so the installation base needs to have a structure that can withstand that much weight.

Moreover, heat loss occurs in the flow path of hot water or heat medium.

This method is disadvantageous in terms of efficiency, and also requires measures to prevent these channels from freezing during winter nights.

Purpose: In view of the above-mentioned problems, the present invention provides a solar heat collection system that does not require complicated piping construction and can collect heat efficiently! This was done for the purpose of obtaining.

In other words, the present invention includes a solar light focusing device, an optical fiber into which focused light can enter from the focal point of the focusing device,
It is characterized by comprising a light-absorbing and heat-generating plate disposed at the other end of the optical fiber so as to intersect with the optical axis of the light beam emitted from the optical fiber.

Theory Moe The invention will be explained below using some examples.

FIG. 1 is a sectional view of an embodiment of the invention.

The solar heat collecting device A of the present invention includes a sunlight focusing device 1 such as a convex lens, a Fresnel lens, or a parabolic mirror, and a terminal end 3A is arranged at the focal point 2 of the focusing device 1, and the focused light S is incident on the solar heat collecting device A. The light-absorbing and heat-generating plate 4 is disposed at the other end 3B of the optical fiber 3 so as to intersect with, preferably perpendicular to, the optical axis of the light beam S' emitted from the optical fiber 3. .

The light-absorbing and heat-generating plate 4 in the above embodiment refers to a plate that receives sunlight aS' and radiates heat, and for example, a heat-resistant black plate is used.

Note that this black plate is matte black.

In the above embodiment, if a Fresnel lens is used as the sunlight focusing device 1, the weight of the sunlight focusing device 1 can be reduced and the structure can be made flat.

Further, as shown in FIG. 2, it is also possible to use a parabolic mirror 1'.

In addition, the solar light focusing device 1 is arranged in a large number of divided elements -IA...lA as shown in FIG. 3 or FIG.
It is desirable to connect the optical fibers 3 to each of them, and to bundle the other ends 3B and arrange them facing the light-absorbing and heat-generating plate 4. With this configuration, a wide area of light receiving can be formed using a thin light receiving plate case.

action Next, the operation of this invention will be explained.

The sunlight concentrating device 1 focuses sunlight on a focal point 2,
The light is guided by an optical fiber 3 to a light absorbing heat generating plate 4. At this time, the light-absorbing and heat-generating plate 4 receives the focused light and generates heat, which heats, for example, water in the hot water storage tank 5 using the plate 4 as a heat source.

Furthermore, since the focused sunlight S' is transmitted through the optical fiber 3, there is almost no loss along the path.

Effects Since this invention is configured as described above, it is sufficient to connect the solar concentrator to the heating element (for example, water) with an optical fiber. There is no need for troublesome construction work, including measures to prevent water leakage, and solar concentrators installed outdoors do not require particularly strong installation foundations because they are not heavy even with a vast light receiving area. It is easy to install, and
There is almost no loss during the sunlight transmission path, so efficiency is high, and heat can be used effectively even in remote locations.

[Brief explanation of the drawing]

1 is a sectional view of an embodiment of the invention, FIG. 2 is a sectional view of another embodiment, FIG. 3 is a sectional view of still another embodiment, and FIG. 4 is a sectional view of the embodiment shown in FIG. 3. FIG. 3 is a plan view of an example. A...Solar heat collecting device, l...Solar focusing device, 2
...Focus, 3...Optical fiber, 3A...Terminal,
3B...Other end, 4...Light-absorbing heat generating plate, S...Solar rays, S'...Concentrated solar rays. A/727 T3fJ A, 41fI

Claims (3)

[Claims] (1) A solar light focusing device, an optical fiber into which focused light can enter from the focal point of the focusing device, and a light absorbing device arranged at the other end of the optical fiber to intersect with the optical axis of the light beam emitted from the optical fiber. 1. A solar heat collecting device comprising: a heating plate; (2) The solar heat collecting device according to claim 1, wherein the sunlight collecting device is a Fresnel lens. (3) The solar heat collecting device according to claim 1, wherein the sunlight collecting device is a parabolic mirror.