| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type water heater capable of efficiently reheating hot water heat exchanged by a bathtub water reheating heat exchanger by a refrigerant-water heat exchanger. <P>SOLUTION: The heat pump type water heater includes: a heat pump unit 100 having a refrigerant circuit sequentially connecting a compressor 1, the refrigerant-water heat exchanger 2, a pressure reducing device 3, and an evaporator 4; a tank unit 200 having a hot water tank 14 for storing hot water heated by the refrigerant-water heat exchanger 2, the bathtub water reheating heat exchanger 31, and a bathtub water circulating device 32; an operation part 11 connected to the tank unit 200 and performing operation; and a hot water circulation device 10 connected between the refrigerant-water heat exchanger 2 and the hot water tank 14. The water heater is further equipped with a mixing valve 33 for mixing water at a lower part of the hot water tank 14 and hot water that has passed through the bathtub water reheating heat exchanger 31. The mixing valve 33 is controlled so that the water temperature at an inlet of the refrigerant-water heat exchanger 2 is a prescribed value. <P>COPYRIGHT: (C)2010,JPO&INPIT |
