To provide a water supply warming system for maintaining the temperature of warm water produced by a heat pump or the temperature of a fluid to be cooled having passed through an evaporator of the heat pump at a desired value.
This water supply warming system includes a heat pump 2 for circulating a refrigerant by sequentially annularly connecting a compressor 4, a condenser 5, an expansion valve 6, and an evaporator 7. In the condenser 5, the refrigerant and water are heat-exchanged to produce warm water. In the evaporator 7, the refrigerant and a fluid to be cooled are heat-exchanged to cool the fluid. On the basis of the temperature detected by a first temperature sensor 8 for detecting the temperature of warm water from the condenser 5, the compressor 4 can be controlled. On the basis of the temperature detected by a second temperature sensor 14 for detecting the temperature of the fluid from the evaporator 7, the compressor 4 can be controlled. The compressor 4 is controlled by selecting the first temperature sensor 8 or the second temperature sensor 14 for control.
KAWAKAMI AKINORI
MORITA AKIO
OTANI KAZUYUKI
| JPH03181750A | 1991-08-07 | |||
| JP2011002139A | 2011-01-06 |