| 摘要 |
PURPOSE:To make it possible to reduce heat losses by a method wherein a first sunlight transmissive member and a second sunlight transmissive member are provided in the solar heat collector and a frame for holding the second sunlight transmissive member is made removable so that the second sunlight transmissive member is arranged over the first sunlight transmissive member. CONSTITUTION:A solar heat collector is constituted such that a heat collecting plate 3 is arranged with in an outer box 1 through a heat insulating material 2, a heat medium pipe 4 is bonded to the heat collecting plate 3 and the first sunlight transmissive member 5 is fixed to the upper surface of the outer box 1. Further, the second sunlight transmissive member 6 is fixed to the upper surface of the holding frame 7 with a stop member 8. The holding frame 7 has a stopper 9 on the inside thereof and is fitted in the outer box 1 with the stopper 9 coming into contact with the first sunlight transmissive member 5. Thus, by the provision of the second sunlight transmissive member 6 over the first sunlight transmissive member 5 an air layer 10 of a suitable thickness therebetween, it is possible to reduce the losses of convection and radiation heat from the first sunlight transmissive member 5 toward outside. Consequently, the loss of heat from the heat collecting plate 3 is reduced and the heat collecting efficency of the solar heat collector is improved. |
