JPS5813958A - Heat collector - Google Patents

Abstract

PURPOSE:To obtain a solar heat collector having a high heat collecting efficiency with a simple and inexpensive structure by a method wherein the interior of a hollow body having a reverse conical configuration with a transparent top wall is evacuated and a heat collecting bulb, into which a heat medium is supplied and from which the heat medium is discharged, is provided at the central position thereof. CONSTITUTION:The interior of a hollow body 1, having the reverse conical configuration and made of a heat resistive transparent material, is evacuated and a convex lense 1a is formed at the central position of the top wall while a concave reflecting surface 1b is formed by metallizing a silver film 2 or the like onto the inner surfaces of the side wall and the bottom wall of the hollow body 1. A heat medium introducing tube 3 is arranged so as to penetrate the bottom wall of the hollow body 1 and locate the inner end thereof at the vicinity of the central position of the hollow body 1. The hollow heat collecting bulb 4 is secured to the inner end of the heat medium introducing tube 3. A heat medium introducing tube 3, is arranged so as to locate the inner end thereof at the central position of the heat collecting bulb 4. According to this method, a part of incident light beams is refracted by the convex lense 1a while the remainder of the light is reflected by the concave reflecting surface 1b and each of them are converged into the heat collecting bulb 4, whereby the heat may be collected in efficient manner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat collector for collecting and utilizing solar heat.

In recent years, with the movement away from petroleum energy, various types of heat collectors have been developed to collect and utilize solar heat. However, water heaters used in homes have low heat collection efficiency, and 2. Description of the Related Art Heat collectors used for power generation and the like have a complicated structure and are expensive to manufacture.

In view of the above-mentioned problems, the present invention aims to provide a heat collector with high heat collection efficiency and low manufacturing cost. The structure of a single heat collector is shown, and 1 is a hollow body made of a heat-resistant transparent material and having a generally inverted conical shape as a whole, and a convex lens portion 1a is integrally formed in the center of the top wall. In addition, a concave reflective surface 1b is formed on the inner surface of the side wall and the bottom wall by depositing a silver film 2, etc., and a concave reflective surface 1b is formed on the inner surface of the side wall and the bottom wall.
The focal length of the convex lens portion 1a and the curvature of the concave reflective surface 1b are respectively selected so that the sunlight refracted by the hollow body 1 and the sunlight reflected by the concave reflective surface 1b converge near the center of the hollow body 1. There is. 3 is a heat medium introduction pipe that penetrates the bottom wall of the hollow body 1 and has an inner end located near the center of the hollow body 1;
The heat medium introduction pipe 3 is made of a metal material with good thermal conductivity, is plated inside to prevent corrosion, and is located at the center of the hollow body 1, that is, at the position where sunlight converges A hollow heat collector 5 fixed to the inner end of the hollow body 1 passes through the bottom wall of the hollow body 1 and the side wall of the heat medium introduction pipe 3, extends along the central axis of the heat medium introduction pipe 3, and has an inner end that is a collector. This is a heat medium discharge pipe located in the center of the heating device 4. Note that the space between the wall of the hollow body 1 and the heat collector 4 is in a vacuum state. FIGS. 2 and 3 each show a heat collector formed by arranging a plurality of the above heat collectors on the same plane, and 6 shows a heat collector whose vertical and horizontal inclinations can be changed by a motor or the like. A holder that is placed on the roof 7 or the like and has a plurality of heat collectors buried in rows or rows and columns on its surface;
8 is connected to the holder 6, detects the position of the sun 9, and connects the holder 6 so that the surface of the holder 6 always faces the sun 9.
This is a control device that completely controls the song. In this case, the heat medium introduction pipe and heat medium discharge pipe of adjacent heat collectors are connected in series to each other.

Since the heat collector according to the present invention is configured as described above,
The control device 8 controls the surface of the holder 6 to always face the sun 9, so that sunlight always enters the heat collector at right angles. Thus, as shown in FIG. 1, part of the incident sunlight is refracted by the lens portion 1a, and the other part is reflected by the concave reflective surface 1b, both of which are converged on the heat collector 4 and concentrated. The inside of the heater 4 becomes high temperature.

Moreover, since the space between the wall of the hollow body 1 and the heat collector 4 is a vacuum, a heat insulating effect is exhibited, and the inside of the heat collector 4 becomes even hotter.

Therefore, the heat medium such as water introduced through the introduction pipe 3 is heated in the heat collector 4 to reach a high temperature, and is discharged from the discharge pipe 5 and supplied to a device (not shown).

As described above, this heat collector exhibits its heat collecting effect, and this heat collector converges the incident sunlight on the heat collector 4 using the convex lens portion 1a and the concave reflective surface 1b, and also focuses the incident sunlight on the heat collector 4. Since the area around 4 is vacuumed and the insulation effect is exhibited,
Its heat collection efficiency is extremely high. Furthermore, since sunlight is always incident on the heat collector at right angles by the control device 8, the heat collection efficiency is further increased. In addition, since the structure of this heat collector is relatively simple, the manufacturing cost is low.

As described above, this heat collector has the practically important advantages of extremely high heat collection efficiency and low manufacturing cost.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing one embodiment of the heat collector according to the present invention, and FIGS. 2 and 3 show a plurality of the above embodiments arranged vertically and horizontally on the same plane, respectively. It is a perspective view showing a heat collector consisting of the following. DESCRIPTION OF SYMBOLS 1... Hollow body, la... Convex lens part, lb... Concave reflective surface, 2... Silver film, 3... Heat medium introduction tube, 4...
・Heat collector, 5...heat medium discharge pipe, 6...retainer, S
...Control diagram 1

Claims (1)

[Scope of claims] A heat collector comprising a nominal hot bulb through which a medium is introduced and discharged, and the inside of the hollow body is kept in a vacuum state.'(2) The top wall is transparent so that incident sunlight is converged near the center. A hollow body having an inverted conical shape and a heat collector located at the center of the hollow body into which a heat medium is introduced and discharged from the outside, the inside of the hollow body being in a vacuum state. This is a heat collector in which multiple heat collector units are arranged side by side and can be moved as a unit to face the sun.