| 摘要 |
PURPOSE: A method to operate a hot water system of a dualistic freeze cycle heat pump is provided to stably produce hot water by simultaneously operating a low gear side and a high gear side or selectively operating the lower gear side. CONSTITUTION: A method to operate a hot water system of a dualistic freeze cycle heat pump comprises the steps of: delivering heat by heat-exchanging in a heat exchanger for a dualistic cycle of a double dualistic heat exchanger (220) in a low gear side freeze cycle heat pump hot water system (100); delivering heat by heat-exchanging with water in a hot water heat exchanger by a compressed refrigerant in a high gear side freeze cycle heat pump hot water system (200) while the hot water flows in the double dualistic heat exchanger without heat exchanging; discharging the hot water after the hot water flows in a hot water heat exchanger (250) and is heat-exchanged; and preheating the hot water by inducing the same to a single hot water heat exchanger (222) of the double dualistic heat exchanger, being heat-exchanged, and receiving the heat. The hot water passes through the hot water exchanger and is discharged without heat-exchanging because the high gear side refrigeration cycle heat pump hot water system is not operated. [Reference numerals] (AA) Low gear side; (BB) High gear side |
