Solar energy absorber

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.