HEAT PUMP TYPE HOT WATER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a heat pump type hot water supply system to simplify constitution of a heat-exchange part having the high efficiency of heat-exchange between water and a refrigerant and immediately detect mixture of a refrigerant evne when a refrigerant is mixed in water. SOLUTION: A plate type heat-exchanger 41 to perform heat-exchange between a refrigerant and water and generate heated water is arranged as a heat-exchange unit 24 in a refrigerating cycle 26. Further, the generated heated water is stored in a hot water storage tank 25 to effect supply of hot water and an air vent valve 44 is inserted in a water piping 5 through which heated water flows from the plate type heat-exchanger 41 to the hot water storage tank 25. A gas leakage detecting sensor 66 to detect refrigerant gas is arranged in the air vent pipe of the air vent valve 44. This constitution detects refrigerant gas by a gas leakage detecting sensor 66 when a refrigerant is mixed in heated water, effects closing operation of the on-off valve 48 of a hot water supply pipe 47 to supply hot water from the hot water storage tank 25 through output of a detecting signal from the gas leakage detecting sensor 66, performs closing operation of the solenoid on-off valve 48 of a hot water supply piping 47 through which hot water is supplied from the hot water storage tank 25, and stops heated water.