JPS5930854Y2 - solar heat collector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solar heat collector that prevents the header from bursting due to freezing even if there is residual water in a part of the header.

Examples of conventional solar heat collectors will be given and problems will be explained below.

As shown in FIGS. 1 to 3, a heat collecting plate 2, a heat collecting pipe 3, a header 4, and a heat insulating material 5 are housed in a casing 1 made of iron plate, stainless steel, aluminum, etc., and a transparent cover 5 covers the casing 1. covers the top of the

In order to attach this cover 5, a cover presser 7 and a sealing material 8, which are individually installed with screws 6, are used.

Further, reference numeral 9 denotes a mounting leg, which, like the cover presser 7, is individually installed on the casing 1 with screws 10.

Furthermore, the header 4 that connects the ends of the heat collecting pipes 3 attached to the heat collecting plate 2 has a brazed portion 4 whose end is sealed with brazing.
It is a.

According to the solar heat collector having such a configuration, water is drained when there is a danger of freezing. However, when installed at an angle as shown in FIG. remains.

For this reason, when frozen, the ice is absorbed into the brazed portion 4a at the end of the header 4.
There was a risk that the soldered part would burst.

In addition, because of the large number of parts, it was difficult to assemble, adjust, and maintain and inspect on-site in order to reduce weight and cost.

Furthermore, since only the solar radiation from the planar transparent cover 5 is absorbed by the heat collecting plate 2, oblique sunlight is not effectively utilized.

This invention was created in view of these problems,
The purpose of this is to form the brazed part at the end of the header upward so that the brazed part is separated from the remaining water, thereby preventing damage to the brazed part due to freezing of the remaining water. It is possible to provide solar thermal collectors.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 4, the brazed portion 11 at the end of the header 11
a is formed upward.

According to this, if water remains in the header 11 to the extent that it does not become full when the water is drained, even if the remaining water freezes, the brazed portion 11a and the remaining water are separated. Therefore, the soldered portion 11a will not be damaged by ice.

Furthermore, by treating the end of the header 11 with elastic rubber or the like, it is possible to prevent the end of the header 11 from being damaged due to residual water freezing.

That is, as shown in FIG. 5, a rubber 13 is attached to the opening at the end of the header 11 with a stopper 12 so as to close the opening, and as water remaining at the end of the header 11 freezes and expands in volume. By causing the rubber 13 to expand, it is possible to prevent the end of the header 11 from bursting.

Since it is made of rubber 13, it will return to its original size and shape during the day.

This rubber 13 needs to have heat resistance of about -20 to 95°C, so it is EPT (abbreviation for ethylene propylene terpolymer).

) Rubber is suitable.

Further, as shown in FIGS. 6 and 7, 14 is a box-shaped transparent cover, which includes a heat collecting plate 2, a heat collecting pipe 3, a header 11
and covers the heat insulating materials 15 and 16 from above.

This cover 14 has mounting legs 1 integrally formed with the heat insulating material 15.
7, the cover 14 can be installed at a site using bolts 18, and the height of the cover 14 is set to be higher than the height of the heat insulating material 15 by a predetermined value H.

If there is a problem with the heat insulating material 15 in terms of heat resistance against direct contact with the heat collecting plate 2, as shown in the figure, a heat resistant material such as glass wool should be used between the heat collecting plate 2 and the heat insulating material 15. It is best to use a good insulation material.

As shown in detail in FIG. 8, the sealing structure of the piping outlet is achieved by inserting a thicker rubber bushing 19 into the notch 15a provided in the heat insulating material 15, and inserting the piping opening into the rubber bushing 19. The diameter of the through hole 19a is made smaller than the outer diameter of the pipe to prevent any gaps from forming.

Therefore, it is possible to reliably prevent rainwater from entering.

Due to this structure, the on-site installation work is as shown in FIG. This will improve work efficiency.

Furthermore, since the number of parts is reduced, weight reduction can be promoted.

Furthermore, since a height difference of a predetermined value H can be provided between the cover 14 and the heat insulating material 15 as shown in FIG.
The oblique sunlight can pass through the side surface of the cover 14 and reach the heat collecting plate 2, so that the oblique sunlight can be effectively utilized.

Furthermore, since the cover 14 can be easily removed on site, maintainability is improved.

Furthermore, since the box-shaped cover 14 is placed on top, a sufficient sealing effect can be obtained without using a sealing material.

As is clear from the above explanation, the present invention provides the following effects.

(1) By forming the brazed portion at the end of the header upward, the brazed portion and residual water are separated from each other, and the brazed portion can be reliably protected from freezing of the residual water.

(2) By configuring the end of the header with rubber, the expansion of volume due to freezing of residual water is absorbed by the expansion of the rubber, and damage to the end of the header can be prevented.

(3) By using a box-shaped transparent cover, the number of parts is reduced, so it is possible to promote weight reduction and cost reduction.

Furthermore, sealing performance is also improved. Furthermore, since the structure is simple, on-site assembly and installation is facilitated, and maintainability after installation is also improved.

Furthermore, since solar radiation can be guided to the heat collecting plate from the side surfaces of the cover, excellent effects such as being able to effectively utilize oblique sunlight are exhibited.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a conventional solar heat collector;
The figure is a sectional view taken along the line A-A in Figure 1, Figure 3 is a plan view showing the installation status of the main parts in Figure 1, and Figure 4 is a main part showing an embodiment of the solar heat collector according to the present invention. A side view, FIG. 5 is a side view of essential parts showing another embodiment of the solar heat collector according to the present invention, and FIG. 6 is a sectional view showing still another embodiment of the solar heat collector according to the present invention. Figure 7 is an exploded perspective view showing the assembly status of Figure 6;
The figure is an enlarged exploded perspective view showing the main parts of FIG. 7. In the figure, 2 is a heat collecting plate, 3 is a heat collecting pipe, 11 is a header,
11a is a brazing part, 14 is a transparent cover, 15.16 is a heat insulating material, 17 is a mounting leg, and 19 is a rubber bush.

Claims (1)

[Scope of utility model registration request] In solar heat collectors in which the ends of the heat collection pipes attached to the heat collection plate are connected to the header, the brazed part at the end of the header is shaped upward to protect the brazed part from freezing of residual water. A solar heat collector characterized by the following features: