JPS5941483Y2 - solar collector - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a solar collector.

Recently, many solar collectors (hereinafter referred to as collectors) are of the so-called glass tube type from the viewpoint of preventing convection loss from the heat receiving part and improving heat collection efficiency.

Such a collector is normally constructed by installing multiple glass tubes in parallel, but from the standpoint of cost reduction, etc., the glass tubes are installed as far apart as possible, and the outside of the glass tubes (
There are also many types of collectors that have a reflective plate installed (in the atmosphere).

In the collector described above, the glass tube provided for the purpose of preventing convection has a relatively high heat transfer rate and radiates a considerable amount of the heat received in the heat receiving part to the outside, so it was not possible to improve the heat collection efficiency much. .

Furthermore, it is said that a reflector placed in the atmosphere (for example, an aluminum plate with a mirror finish) will have a reduced surface reflectance due to oxidation and dust accumulation in the atmosphere, making it impossible to maintain its reflective performance over a long period of time. There were drawbacks.

Furthermore, the above-mentioned type of collector has economic disadvantages, such as the large size of the reflector and the need for a support for it.

The present invention has been made to eliminate these drawbacks.

Examples of the present invention will be described below. FIG. 1 shows a longitudinal sectional view of a collector according to the present invention.

The T-H rule glass tube 1 and the inner glass tube 2 are coaxially sealed at both sides 3, and the space 4 between them is evacuated.

However, the support plate 5 is made of a thin material with good thermal insulation (for example, mica), and the reflection plate 6 is supported in a predetermined position by a method described later, and the space 4 is filled with the support plate 5 before the glass tubes 1 and 2 are sealed. is incorporated into.

Note that 7 indicates a tip-off section.

The heat receiving part 10 is pushed into the interior of the inner glass tube 2 coaxially therewith and is supported by plugs 9, 9 fitted in the openings 8, 8 at both ends of the glass tube.

FIG. 2 is a perspective view of the heat receiving part 10, in which a copper pipe 12 is welded inside a cylindrical heat collecting plate (hereinafter referred to as heat collecting plate) 11 having a notch parallel to the axis. A plurality of springs 13 are welded to the surface of the plate 11.

As shown in FIG. 1, this spring 13 coaxially and stably fixes the entire heat receiving group together with the plug 9.

The reflector plate 6 is a thin metal plate whose concave surface is finished to a mirror finish, and has the shape of a gutter as shown in FIG.
There are a plurality of engaging protrusions 14 at both ends thereof as shown.

FIG. 4 is a plan view showing the shape of the support plate 5 for supporting the reflecting plate 6 in a predetermined position.

The support plate 5 has a thin ring shape, and has a plurality of protrusions 15.16 on its inner and outer peripheries. It is crimped.

The small holes 17 in the support portion 5 are for inserting and engaging the engaging protrusions 14 of the reflecting plate, or for fixing them with eyelets.

If the reflector 6 is made of an inelastic material such as aluminum, the lower surface of the inner glass tube does not need to contact the concave bottom of the reflector 6, but if the reflector 6 is made of an elastic material (for example, stainless steel), Since the tube does not have the shape of a gutter as shown in FIG. 3, the lower surface of the inner glass tube contacts and presses the concave bottom of the reflecting plate 10, resulting in the shape shown in FIG. 3 being maintained.

Note that the shape of the heat collecting plate in the heat receiving section may be not only cylindrical but also planar, and the gist of the invention does not change even if the heat receiving section is a heat pipe.

As described above, according to the present invention, the transparent double wall structure is enhanced, and the interior and
A cylindrical transparent heat insulator with both ends open, a reflector disposed between the inner and outer walls of the heat insulator, and a reflector arranged to penetrate the heat insulator in the axial direction. A heat collecting pipe installed, a heat collecting fin attached to the pipe, a spring elastically supporting the heat collecting fin at a predetermined interval on the inner surface of the heat insulating body, and sealing the openings at both ends of the heat insulating body. Since the solar heat collector is constructed from a pair of stoppers and a stopper, the following effects are achieved.

- Since the heat collecting pipe and heat collecting fins are surrounded by the transparent heat insulating container, it has excellent heat insulation properties.

(2) Since the sunlight is concentrated by the reflector, the heat collection efficiency is good, and in combination with the above-mentioned heat insulation properties, solar heat can be collected efficiently.

(2) Since the reflector is housed between the inner and outer walls of the heat insulating body, it is possible to prevent the reflection performance from deteriorating due to oxidation (corrosion) or dust accumulation.

■ Heat collection pipes and heat collection fins are located inside a non-vacuum heat insulator that is sealed by a plug, so while maintaining sufficient heat dissipation inside the heat insulator, the fins and pipes expand and contract when heated and cooled to close to the plug. Even if the stopper is slightly removed and the heat insulating body is unsealed due to stress acting on the body, there is no effect on the vacuum space between the inner and outer walls of the heat insulating body, so it is not as sudden as in conventional vacuum tube type collectors. The insulation performance does not deteriorate and has excellent durability.

(2) Since both ends of the heat insulating body are open, there is no directionality in the heat insulating body when inserting the heat collecting pipe and the heat collecting fin, making it very easy to handle and making the collector easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the collector of the present invention, FIG. 2 is a perspective view of its heat receiving part, FIG. 3 is a perspective view of a reflecting plate, and FIG. 4 is a plan view of a support plate. Symbols: 1: 9 glass tube, 2: inner glass tube, 5: support plate, 10: heat receiving part, 6: reflection plate.

Claims (1)

[Scope of utility model registration request] A cylindrical transparent heat insulating body with a transparent double wall structure and a vacuum insulation space between the inner and outer walls and open at both ends, and a reflector disposed between the inner and outer walls of this heat insulating body. - A heat collecting pipe installed to penetrate in the axial direction of the heat insulating body, a heat collecting fin attached to this pipe, and this heat collecting fin being elastically supported at a predetermined interval on the inner surface of the heat insulating body. 1. A solar heat collector comprising: a spring; and a pair of plugs that seal openings at both ends of the heat insulating body.