SOLAR HOT WATER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a solar hot water supply system that can be easily constructed while improving a heat exchanging performance and reducing the cost of components.SOLUTION: A solar hot water supply system 1 includes: a heat storage tank 3 of atomospheric release type for reserving a heat medium L; piping 4 for sending the heat medium, to send the heat medium L inside a solar heat collector 2 to the heat storage tank 3; piping 5 for returning the heat medium, to return the heat medium L in the heat storage tank 3 to the solar heat collector 2; a first electric three-way switching valve 71 for switching circulation passages of the heat medium L; a heat exchanger 6 disposed in the heat storage tank 3 and having high temperature side piping 61 connected to the first electric three-way switching valve 71 and low temperature side piping 62 connected to a water supply pipe 11; a circulation pump 7 disposed at an upper stream of the first electric three-way switching valve 71 in the piping 5 for returning the heat medium for circulating the heat medium L between the solar heat collector 2 or the high temperature side piping 61; and a controller 8 having a first control section 81 for controlling the first electric three-way switching valve 71 and a second control section 82 for controlling the circulation pump 7.