| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a highly efficient heat pump hot water heater capable of suppressing an excessive increase in a condensation temperature in a heat pump cycle and reducing the power consumption of a circulation pump. <P>SOLUTION: The heating amount of the heat pump cycle is controlled so that a supply temperature Two may be lower than a first target supply temperature Twot1 set by a user when the time changing amountΔTwo of the supply temperature Two enters a temperature change permissible rangeε1, and the time changing amountΔTwi of a return temperature Twi enters a return temperature change permissible rangeε2, and a difference between the supply temperature Two and a target supply temperature Twot enters a supply temperature error permissible rangeε3, and then a circulation flow rate of a water heat medium is controlled to suppress the increase in the return temperature Twi. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
