| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump which has improved starting characteristics at start-up and improved responsiveness to a change in the operating conditions and which does not suffer from the problems of an overload operation, a high-pressure overshoot near the target frequency, and liquid-backflow, thereby making it possible to improve the reliability of the compressor. <P>SOLUTION: The heat pump 1 in which an inverter-driven compressor 12, a usage-side first heat exchanger 13, decompression means 115, a heat-source-side second heat exchanger 16 are sequentially connected by a refrigerant pipe 17, forming a closed-cycle refrigerant circuit 18, the heat pump 1 including a control unit 30 that, when changing the operating rotation frequency of the compressor 12 in response to a change in operating conditions, changes the frequency-changing rate based on a deviation between a current frequency and a target frequency, the frequency-changing rate being increased when the deviation is large and the frequency-changing rate being decreased when the deviation is small, to change the operating rotation frequency. <P>COPYRIGHT: (C)2012,JPO&INPIT |
