SOLAR COLLECTOR

摘要

PURPOSE: A solar collector is provided to reduce damage due to thermal stress by a difference between a temperature of an inner glass pipe and a temperature of an outer glass pipe. CONSTITUTION: Two glass pipes(11,13) different in diameter are overlapped with each other. Both ends of the two glass pipes are connected with an energy storage tank(15). A circular separation part(17) is formed by cutting the middle of the outer glass pipe in a horizontal direction. A sealing circular body(19) is inserted into the outside of the outer glass pipe to cover the circular separation part. A plurality of caps(21,23) are coupled with upper and lower parts of the sealing circular body. The circular separation part buffs a difference in expansion of the two glass pipes. A plurality of sealing rings(25) are inserted into a space between the sealing circular body and the outer glass pipe for maintaining a vacuum state.