| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an instantaneous heat pump type water heater capable of allowing a compressor to cope with the sudden change of the load without being urgently stopped, in the instantaneous heat pump-type water heater comprising a water-refrigerant heat exchanger in a refrigerating cycle, and supplying the hot water from the water-refrigerant heat exchanger to a user side. <P>SOLUTION: In this heat pump type water heater wherein the control is ordinarily performed to operate a control system comprising a heat pump load detecting means independently constantly operated with priority, a load variation detecting means and a load converting means for converting the sudden variation of the load into the variation of a corresponding motor speed of the heat pump, and adding the same to the present speed command to control the capacity of the heat pump, which solves problems found in a case when the heat pump comprising an electric compressor for instantaneous water supply is used, such as the insufficient capacity of the heat pump or the excess load in the ordinary control system caused by the sudden variation of the heat pump load in opening and closing a hot-water tap, as the hot water output response of the heat pump is performed by the order of minutes, and the sampling grade in controlling the capacity of the heat pump is to that extent. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
