| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem wherein there is a possibility of causing a humming phenomenon and generating low frequency noise when a compressor and a hot water supply pressurization pump, a circulating pump and the hot water supply pressurization pump, and the compressor an the circulating pump are respectively operated at close frequencies. <P>SOLUTION: The heat pump type water heater is equipped with a hot water storage tank 1 storing hot water, the compressor 18, a coolant water heat exchanger 19, a decompressor 20, and an evaporator 21, a heat pump type heating means 2 for heating the hot water in the hot water storage tank 1, a hot water supply pipe 10 for supplying the hot water of the hot water storage tank 1, and the hot water supply pressurization pump 16 provided in a middle of the hot water supply pipe 10 and carrying out pressurization hot water supply of supply hot water. A frequency determining means 30 is provided for determining whether an operating frequency of the compressor 18 and an operating frequency of the water supply pressurization pump 16 come close, and if the frequency determination means 30 determines that the frequencies come close, the operating frequency of the hot water supply pressurization pump 16 is corrected by a predetermined frequency portion. <P>COPYRIGHT: (C)2009,JPO&INPIT |
