PURPOSE: To improve the heat collecting efficiency by a method wherein a heat collecting pipe is located at the focus of a lens and a flat plate type heat collector is located below the pipe in order to collect not only the insolation by means of the lens but also the insulation not in the form of parallel rays such as sky radiation and the like.
CONSTITUTION: A heat collecting case 7 is arranged below the lens 1 such as Fresnel lens or the like and the heat collecting pipe 2 is located at the focus of the lens 1 in the heat collecting case 7 and further the flat plate type heat collector 4 is stationed below the heat collecting pipe 2 in the heat collecting case 7. Said flat plate type heat collector 4 consists of a heat transmission plate 4a, on the back surface of which a plurality of capillary tubes 4b are equipped communicating to the outlet of the flat plate type heat exchanger 4 and to the heat collecting pipe 2.
IWATA HIDEO
NAKAO TADAO
SHINCHIYOU PLASTIC SHIYOUMEI K