| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump heat source device preventing occurrence of chattering sound from a defrosting valve by avoiding increase in cost of a valve component and complication of the device.SOLUTION: A back pressure countermeasure part 72, when a temperature Tm1 of a heat medium in a heat medium pipeline 20 in an expander 23 detected by a temperature sensor 35 is higher than a temperature Twin of water supplied from a tank circulation path 41 to the expander 23 detected by a temperature sensor 43 by a predetermined temperature or more, opens a defrosting solenoid valve 26.SELECTED DRAWING: Figure 1 |
