| 摘要 |
PROBLEM TO BE SOLVED: To provide a control method of an air conditioner for controlling an opening of an expansion valve to achieve the optimum refrigeration cycle state in a short time by preventing the deterioration of following capability caused by a control interval in low rotating speed of a compressor, to perform the operation of high efficiency. SOLUTION: This control method of the air conditioner comprises a discharge temperature sensor mounted at a discharge side of the compressor for detecting a discharge temperature of a refrigerant, a discharge temperature deviation calculating means calculating the deviation of a predetermined target discharge temperature and the present discharge temperature, a calculated expansion valve opening means for storing the optimum calculated expansion valve opening of the expansion valve in accordance with the rotating speed of the compressor determined by an experiment in advance while applying the rotating speed of the compressor, and an evaporation temperature and a condensation temperature of the refrigerant as parameters, and a valve opening deviation calculating means for calculating the deviation between the calculated expansion valve opening and the present expansion valve opening. In a case when the deviation between the target discharge temperature and the present discharge temperature detected by the discharge temperature sensor is more than a specific value, the deviation of the calculated expansion valve opening and the present expansion valve opening is determined, and the opening of the expansion valve is tentatively reduced until the deviation becomes equal to the calculated expansion valve opening. COPYRIGHT: (C)2005,JPO&NCIPI |
