| 摘要 |
PROBLEM TO BE SOLVED: To maximuly exert effect of performance improvement by injection by properly controlling two throttle devices in a refrigeration cycle for performing the injection to a compressor. SOLUTION: A compressor speed and an outside air temperature are detected, a throttle amount of the throttle device on the downstream side is controlled according to the compressor speed and the outside air temperature, and a downstream-side expansion valve is opened to prevent performance reduction by the liquid injection when detecting a liquid injection state by a compressor discharge refrigerant temperature and a compressor suction refrigerant temperature. COPYRIGHT: (C)2006,JPO&NCIPI |
