Solar energy absorber

Abstract

The solar energy absorber is capable of reducing weight, being directly connected to a water supply pipe, increasing pressure of heated water, omitting a pressurizing pump, etc. The solar energy absorber comprises: a water-flowing section including heat collection tubes, which are composed of stainless steel, and connecting pipes; a heat-retaining box accommodating the water-flowing section, including a heat insulating material and having an opening part which is located on the heat collection side; and a cover plate being composed of a transparent multilayer plastic and closing the opening part of the heat-retaining box. The heat collection tubes are arranged parallel. End plates closing ends of the heat collection tubes are connected to the connecting pipes. Each of the heat insulating tubes is coated with a heat-absorbing layer. Parts of the heat collection tubes which are located on the opposite side of the heat collection side contact the heat insulating material.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. P2008-158507, filed on May 21, 2008, and the prior Japanese Patent Application No. P2008-235241, filed on Sep. 12, 2008, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a solar energy absorber capable of heating water with solar energy.BACKGROUND OF THE INVENTION[0003]A conventional solar energy absorber is shown in FIG. 5. A cover plate 3 is a transparent glass plate. A heat collection section 1 is constituted by a plurality of stainless plates 9, which are mutually adhered. An inner bottom face and inner side faces are covered with an insulating material 4 composed of glass wool so as to keep temperature. The solar energy absorber is partially covered with a metal plate 2 and connected to a water storing tank 5, which is composed of polyethylene and c...

AI Technical Summary

Benefits of technology

[0023]wherein each of the heat insulating tubes is coated with a heat-absorbing layer, whose heat-absorbing efficiency and heat loss preventing efficiency are high, and

[0029]By the above described structures, the present invention has following effects:

[0030](1) the cover plate is composed of the transparent multilayer plastic so that a weight of the cover plate can be highly reduced, further no water storing tank is required so that a weight of the solar energy absorber can be highly reduced;

[0031](2) the water-flowing section is constituted by the heat collection tubes, the end plates and the connecting pipes, so that the water-flowing section can fully resist pressure of tap water, deformation can be prevented and the water-flowing section can be directly connected to a water supply pipe;

[0033](4) since the water-flowing section can be directly connected to the water supply pipe, the problem of low pressure of the discharged heated water can be solved, flow back of the heated water can be prevented even when the heated water is mixed with the cold tap water in, for example, a shower unit, further, no pressurizing pump is required;

[0035](6) since no water storing tank is required, the external shape of the solar energy absorber can be improved.

Problems solved by technology

(1) the transparent glass plate 3 is too heavy to treat;

(2) as shown in FIG. 6, the stainless plates 9 are mutually adhered, so the plates 9 cannot fully resist water pressure, the plates 9 will be deformed if water pressure of tap water is directly applied thereto, therefore the water pressure must be received by the ball tap 6 and the plates 9 must be separated from the tap water;

(3) water is supplied to the water storing tank 5 by the ball tap 6, the discharged hot water is pressurized by only level difference between the water level in the water storing tank 5 and a level of a water faucet, so pressure of the discharged hot water must be low;

(4) since the pressure of the discharged hot water is low, the hot water will flow back when the hot water is mixed with the cold tap water in, for example, a shower unit, further, in case that the solar energy absorber is connected to a boiler, a pressurizing pump must be required;

(5) since the stored water contacts air in the water storing tank 5, black mold will mold so the heated water must be unsanitary water; and

(6) as shown in FIG. 5, the water storing tank 5 is projected and causes disfigurement after setting, so the poor design have constricted popularization of the conventional solar energy absorbers.

Images