A window-type solar heat collector is composed of the low-vacuum cavity consisting of light transmission plate and transparent partition, circulating water channel chamber consisting of said transparent partition and water channel plate, heat collecting plate with heat insulating layer on its back and mounted on supporter, and the water chamber consisting of said transparent partition and water channel plate. It is characterized by that said heat collecting plate is made up of polycarbonate and polystyrene through injection moulding. Its advantages are high heat efficiency (greater than 60%), and large daylighting area. |