Tub circulation flow path switching device , and the bath hot water supply system using this

摘要

PROBLEM TO BE SOLVED: To provide a bathtub circulation flow passage switching device which inhibits the circulation using only residual water in a bath circulation circuit when a bathtub is empty.;SOLUTION: The bathtub circulation flow passage switching device includes: a going flow passage 39 from a heat source unit 3 to a bathtub 2; a return flow passage 40 from the bathtub 2 to the heat source unit 3; a bypass flow passage 41 which bypasses the going flow passage 39 and the return flow passage 40; and a temperature sensitive switching valve 42 which blocks a bypass flow passage 41 side and communicates a heat source unit 3 with a bathtub 2 side of the going flow passage 39 in case a temperature of circulating hot water is high, and blocks the bathtub 2 side of the going flow passage 39 and communicates the bypass flow passage 41 side with the heat source unit 3 side of the going flow passage 39 in case a temperature of circulating hot water is low. Here, an air-water separator 43 is provided on the way of the return flow passage 40, and a heat source unit 3 side of the return flow passage 40 is connected to an upper portion of the air-water separator 43 and a bathtub 2 side of the return flow passage 40 is connected to a lower part of the air-water separator 43, with a prescribed vertical difference from the upper portion of the air-water separator 43, where the heat source unit 3 side of the return flow passage 40 is connected.;COPYRIGHT: (C)2013,JPO&INPIT