JPS5856520Y2 - solar heat collector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of a flat plate type solar heat collector, and the object is to obtain a solar heat collector that has a particularly excellent appearance and can maximize the effective heat collection area.

In general, a flat plate type solar heat collector, as shown in Figs. 1 and 2, has a casing 1 that is open on the top surface, a heat collecting plate 3 housed in the casing 1, and a sealed opening of the casing 1. It is composed of a transparent plate 2 and a heat insulating material 7.

Further, the heat collecting plate 3 includes a heat collecting pipe 5, a heat absorbing plate 4 covering the upper surface of the heat collecting pipe 5, and a header 6 communicating with the heat collecting pipe 5 to supply and drain water.

Further, the heat collecting plate 3 is usually formed by joining the header 6 and the heat collecting pipe 5 with phosphorous copper brazing or the like, and then joining the heat collecting pipe 5 and the heat absorbing plate 4 with solder or the like.

Conventionally, in such a heat collecting plate 3, a small gap is often provided between the heat absorbing plate 4 and the header 6 for ease of manufacture, which is not desirable in terms of appearance.

Further, since the joint 8 between the heat collecting pipe 5 and the header 6 is brazed, there is a risk that corrosion products may be produced during long-term use.

For example, when water is used as a heat medium, steel pipes are often used to prevent corrosion, but copper produces a patina, and this patina is unsightly and has long been a problem. .

In order to solve the above problems, a solar heat collector was devised as shown in FIG. 3, which is equipped with a header cover 9 that covers the gap between the header 6 and the heat absorbing plate 4.

Since the header ladder cover 9 of this invention is fixed to the casing 1, the sunlight that passes through the transparent plate 2 and hits the header cover 9 is not transmitted to the heat collecting plate 3, but is entirely transmitted to the casing 1, resulting in heat loss. There is.

That is, the header 6 normally has an outer diameter of about 20 mm, and to cover the gap between the header and the heat collecting pipe 5, a ladder cover with a width of 3 Q mm or more is required for each of the upper header and the lower header, and the area of this part is This area is wasted as a heat collecting area, and the ineffective area occupied by the header cover in the sunlight transmission area reaches 3% of the total area.

The present invention was developed in view of the drawbacks of sloping water heaters, and aims to provide a solar water heater at a low cost that has an excellent appearance and can maximize the effective heat collection area. ``The gist of this is that a gap is provided between both ends of the heat absorbing plate and the header, and the heat absorbing plate is extended to the vicinity of the side wall of the casing, covering a portion of both ends of the heat collecting pipe and the header.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

1 has a heat insulating material 7 placed on the internal side wall and bottom wall, and a transparent plate 2 on the top surface.
This is a casing for a solar heat collector.

6 is a plurality of heat collecting pipes 5 formed of metal such as copper.
This is a header connected to both ends of the header with phosphor copper solder.

Reference numeral 4 denotes a heat absorption plate in the form of a plate, which is joined to a plurality of heat collecting pipes 5 by soldering or the like, and extends to the vicinity of the side wall of the casing with a gap provided above the header 6 at both ends. Heat collecting pipe 5...
. . . and the headers 6.6 at both ends are completely covered.

That is, when solar heat energy is absorbed by the heat absorbing plate 4 extended on the top surface of the header, it is conducted to the plurality of heat collecting pipes 5 arranged in parallel via solder.

Therefore, the present invention is a solar heat collector in which heat absorbing plates are joined to a plurality of heat collecting pipes, leaving a part of both ends of the iron pipes, and headers are connected to both ends of the iron pipes. A gap is provided between the tubes and the tubes are extended near the side walls of the casing to completely cover parts of both ends of the heat collecting tubes and the header, resulting in the following effects.

(1) Since the header rudder cover has a structure in which the heat absorption plate is extended, there is no need to manufacture the header cover separately or to perform complicated installation work as in the past, and the header cover can be provided at a low cost.

Moreover, the effective heat collection area increases by 3% or more, and the heat collection efficiency per transmission area improves.

(2) Since a gap is provided between the heat absorbing plate and the header ladder cover, even if cold water flows into the header when the header cover is at a high temperature, no condensation will occur in the header.

Therefore, the transmission plate will not become cloudy due to evaporation of dew condensation and the heat collection efficiency will not be reduced.

(3) Since a part of the heat collecting pipe connected to the header and the PETDA is covered with a heat absorbing plate, corrosion products such as patina are not visible at the joint between the header and the heat collecting pipe, which is preferable in terms of appearance.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional embodiment, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is a partial sectional view showing another conventional embodiment, and FIG. FIG. 5 is a plan view showing the embodiment, and FIG. 5 is a sectional view taken along line BB in FIG.

Claims (1)

[Scope of utility model registration request] In a solar heat collector in which a heat absorption plate is joined to a plurality of heat collection pipes installed in parallel, leaving a part of both ends of the heat absorption pipe, and a header is connected to both ends of the heat absorption pipe, both ends of the heat absorption plate are connected between the header and the heat absorption plate. 1. A solar heat collector characterized in that the solar heat collector extends near the side wall of the casing with a gap therebetween, and covers a portion of both ends of the heat collecting pipe and the header.