| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of the performance coefficient of a heat pump cycle upon heating operation. SOLUTION: An indoor heat exchanger 30 is divided into two parts and a first indoor heat exchanger 31, positioned at the upstream side of the flow of refrigerant upon heating operation, is arranged in an air conditioner easing 33 at the downstream side of the outlet air flow of a second indoor heat exchanger 32. Further, the control of an electric expansion valve 50 is optimized in respective operation modes of heating operation and cooling operation. According to this method, the lower limit side temperature of temperature range of outlet air is increased whereby the temperature of the outlet air can be increased without increasing a high-pressure side pressure and the temperature of the outlet air can be increased while preventing the deterioration of a performance coefficient. |
