| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating system capable of properly changing a flow rate of a heat medium passing through a heat exchanger according to a situation.SOLUTION: A hot water supply heating system 2 includes a heat pump 50, a tank 10, a tank water circulation path 20, a three-fluid heat exchanger 58, an air-heating water circulation path 71, and six heaters 76a-76f. The air-heating water circulation path 71 includes a bypass path 94 and an adjusting valve 90. The bypass path 94 connects an upstream side and a downstream side of the three-fluid heat exchanger 58. The adjusting valve 90 changes a ratio of a flow rate of water passing through the three-fluid heat exchanger 58 and a flow rate of water passing through the bypass path 94 by changing its opening. The more the number of operated heaters 76 is, the more the flow rate of the water circulated in the air-heating water circulation path 71 increases, by operation of a circulation pump 74. The adjusting valve 90 changes its opening so that the more the number of operated heaters 76 is, the more the ratio of the flow rate of the water passing through the bypass path 94 increases. |
