AIR CONDITIONER

To enable optimal operation to be performed with R1234yf noted for a small warming coefficient, which cannot be performed by conventional throttling controls.SOLUTION: An air conditioner 100 uses a refrigerant including R1234yf and comprises: a compressor 1; a condenser 2; throttle means 3; an evaporator 4; air temperature detection means 5; refrigerant temperature detection means 6; control means 7; first blowing means 8; and second blowing means 9. The air temperature detection means 5 detects a temperature of air supplied to the evaporator 4, the refrigerant temperature detection means 6 detects a temperature of the refrigerant at an outlet of the evaporator 4, and each transmit the respective temperature information to the control means 7. The control means 7 adjusts opening of the throttle means 3 on the basis of the air temperature detected by the air temperature detection means 5 and the refrigerant temperature detected by the refrigerant temperature detection means 6.SELECTED DRAWING: Figure 1 【課題】温暖化係数の小さいことで注目されているＲ１２３４ｙｆでは、従来の絞り制御では最適な運転を行えないという課題がある。【解決手段】空気調和機１００は、Ｒ１２３４ｙｆを含む冷媒を使用し、圧縮機１と、凝縮器２と、絞り手段３と、蒸発器４と、空気温度検知手段５と、冷媒温度検知手段６と、制御手段７と、第一の送風手段８と、第二の送風手段９と、を備える。空気温度検知手段５は蒸発器４に送られる空気の温度を検知し、冷媒温度検知手段６は蒸発器４の出口における冷媒の温度を検知し、それぞれ制御手段７へ温度情報を伝える。制御手段７は、空気温度検知手段５の検知した空気温度と冷媒温度検知手段６が検知した冷媒温度に基づいて絞り手段３の開度を調整する。【選択図】図１