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.

1 . A solar energy absorber capable of heating water with solar energy, said solar energy absorber comprising:
 a water-flowing section including a plurality of heat collection tubes, which are composed of stainless steel and each of which has an upper end and a lower end, an upper connecting pipe, which is horizontally arranged and whose diameter is smaller than that of the heat collection tubes, and a lower connecting pipe, which is horizontally arranged and whose diameter is smaller than that of the heat collection tubes;   a heat-retaining box accommodating said water-flowing section, said heat-retaining box 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, said cover plate closing the opening part of said heat-retaining box without contacting the heat collection tubes,   wherein a plurality of the heat collection tubes are arranged parallel,   wherein the upper ends of the heat collection tubes are respectively closed by upper end plates, the lower ends of the heat collection tubes are respectively closed by lower end plates, the upper end plates are connected to the upper connecting pipe and the lower end plates are connected to the lower connecting pipe so as to integrate the heat collection tubes,   wherein each of the heat insulating tubes is coated with a heat-absorbing layer, and   wherein parts of the heat collection tubes which are located on the opposite side of the heat collection side contact the heat insulating material.   
   
   
       2 . The solar energy absorber according to  claim 1 ,
 wherein the heat insulating material is a vacuum heat insulating material.   
   
   
       3 . The solar energy absorber according to  claim 1 ,
 wherein gaps between the heat collection tubes are air-tightly sealed, by sealing members, so as to restrain air convection.   
   
   
       4 . The solar energy absorber according to  claim 1 ,
 wherein the cover plate includes an intermediate hollow layer.   
   
   
       5 . The solar energy absorber according to  claim 4 ,
 wherein the intermediate hollow layer is air-tightly closed and depressurized.