| 摘要 |
PROBLEM TO BE SOLVED: To provide a solar heat collector having high heat collection efficiency, in which a heat transfer fin is bent by small stress and thereby easiness in insertion and adhesion to a double vacuum tube of the heat transfer fin are improved.SOLUTION: A solar heat collector concentrates solar radiation energy on a heat collection part 1 and warms a heat carrier flowing in the heat collection part. The collector includes: a double vacuum tube 2 made of transparent glass; a selective absorption film 3 coated on an outer peripheral surface of an inner tube 2b in the double vacuum tube 2; a heat transfer fin 10 that can come into surface contact with an inner peripheral surface of the inner tube 2b in the double vacuum tube 2 by elastic force; and a heat carrier pipe 15 coming into surface contact with an inside surface of the heat transfer fin 10. An outside surface of the heat transfer fin 10 is subjected to anode oxidation film treatment, and an outer diameter of the heat transfer fin 10 is formed as the same diameter as an inner diameter X of the inner tube 2b in the double vacuum tube 2 or larger. Furthermore, the heat transfer fin is formed in a cross-sectional circular-arc shape while one side thereof is opened, and a V-shaped bent part 12 is provided which bends in a V-shape toward the inside of a circular arc part such that a tip is positioned at a portion opposite to the opening. |
