| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type water heater capable of preventing inability in boiling up for hot water supply caused by frequent defrosting operations. <P>SOLUTION: In this heat pump type water heater, a heat pump circuit 18 is composed of a compressor 13, a refrigerant-water heat exchanger 14, an air heat exchanger 17 constituting an evaporator, and a blower fan 16, an inflow pipe 12 for supplying water to the refrigerant-water heat exchanger 14, and an outflow pipe 11 for directly supplying the water heated by the refrigerant-water heat exchanger as hot water are disposed, and a bypass circuit 21 is connected between the inflow pipe 12 and the outflow pipe 11 at the windward side of the air distributed by an air blower 16 of the air heat exchanger 17. Thus defrosting can be performed while supplying hot water without stopping the hot water supply by using a part of the secondary-side supplied hot air for defrosting the air heat exchanger 17 in the water heater utilizing the heat pump circuit 18, that is, the defrosting can be surely performed without deteriorating efficiency, and the water heater can be used with ease. <P>COPYRIGHT: (C)2007,JPO&INPIT |
