| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain an internal pressure of a circulation passage lower than an internal pressure of a hot water storage tank 2 in a heat exchange device heating bathtub water passing through the circulation passage as a heat source for hot water of the hot water storage tank 2. <P>SOLUTION: The heat source device is provided by incorporating a bath heat exchanger 49 in the circulation passage wherein water of a bathtub 3 is passed through an external return pipe 44, a circulating pump 12, an internal outgoing pipe 43, a three way valve 48, the bath heat exchanger 49, an internal outgoing pipe 43 of a passage 54 side, and an external outgoing pipe 45 in this order, and returned to the bathtub 3. The bath heat exchanger 49 leads the hot water of the hot water storage tank 2 through a hot water supply external passage 21, a hot water internal lead-in pipe 25, and a heat exchange heat source pipe 50, and heat exchange heating of the hot water led in from the hot water storage tank 2 with the bathtub water passing through the circulation passage, is carried out through the circulation passage in the bath heat exchanger 49. A blow valve 70 is provided in an outer side position of the hot water storage tank 2 in the circulation passage. The blow valve 70 blows out the bathtub water passing through the circulation passage when the pressure in the circulation passage exceeds a set pressure lower than the pressure in the hot water storage tank 2 to adjust the internal pressure of the circulation passage such that it does not exceed the set pressure. <P>COPYRIGHT: (C)2007,JPO&INPIT |
