| 摘要 |
PROBLEM TO BE SOLVED: To provide a comfortable air conditioning control by ensuring a power- operated expansion valve to obtain a given opening degree. SOLUTION: A running volume of a compressor 21 is controlled in response to an air conditioning load while an opening rate of a power-operated expansion valve EV is controlled based on a detected temperature of a discharge pipe sensor Th-d such that a discharge-pipe temperature of the compressor 21 becomes an optimum discharge-pipe temperature. Furthermore, in the case where the running volume of the compressor 21 is large, a control speed for changing the opening rate of the electrically-operated expansion valve EV is accelerate, while in case that the operation volume of the compressor 21 is small, the control speed for changing the opening rate of the power-operated expansion valve EV is decelerated. |
