초록 ▼

A solar heat collecting apparatus comprises at least one heat collecting element comprising a cylindrical outer member in which at least its circumferential wall has permeability to solar radiant energy and the two end faces of the cylinder are closed, a cylindrical inner member disposed in the oute

A solar heat collecting apparatus comprises at least one heat collecting element comprising a cylindrical outer member in which at least its circumferential wall has permeability to solar radiant energy and the two end faces of the cylinder are closed, a cylindrical inner member disposed in the outer member with the interposition of a thermal insulating space with its either end protruding beyond each end face of the outer member, an absorbing means for absorbing the difference between the amounts of heat expansion and contraction of the outer and inner members, the two members and the means being integrally formed.

대표청구항 ▼

Solar heat collecting apparatus comprising: a plurality of heat collecting elements, each of said elements including, a tubular outer member having a circumferential wall portion permeable to radiant solar energy, end portions sealed to said tubular outer member to provide an evacuated space within

Solar heat collecting apparatus comprising: a plurality of heat collecting elements, each of said elements including, a tubular outer member having a circumferential wall portion permeable to radiant solar energy, end portions sealed to said tubular outer member to provide an evacuated space within the outer member, a tubular inner member disposed within the evacuated space of the outer member and having an outer circumferential surface for absorbing solar radiant energy, said tubular inner member having end portions which protrude through respective end portions of the outer member, absorbing means for absorbing the difference between the amounts of heat expansion and conTraction of said outer member and said inner member, and a bladed heat collecting member connected in heat conducting relation to, and extending radially from, the outer surface of the inner member within the evacuated space; a plurality of means of thermally insulating material for supporting said plurality of heat collecting elements, the end portions of the inner members of the heat collecting elements being connected together inside the support elements; means for conducting a fluid through the inner members of a plurality of said heat collecting elements connected in series; and a plurality of valve means for controlling the flow of fluid through a selected number of said inner members, each of said valve means being enclosed in said supporting means and disposed at the connection between the fluid conducting means and the end portion of the inner member of the last heat collecting element of a series of said elements, said supporting means having openings therein for allowing operation of said valve means.