| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerant cycle with an ejector capable of improving COP and properly air-conditioning an air-conditioned space in both of a cooling operation mode and a heating operation mode. <P>SOLUTION: First and second four-way valves 12a, 12b switching a refrigerant flow channel, switches the flow channel to branch the refrigerant flowing out from an outdoor heat exchanger 13 to supply one of the refrigerants to a nozzle portion 18a of the ejector 18, and supply the other refrigerant to a using-side heat exchanger 14 while decompressing and expanding the refrigerant, and sucking the refrigerant from a refrigerant suction opening 19b of the ejector 18 in the cooling operation mode. As the liquid-phase refrigerant can be surely supplied to the using-side heat exchanger 14 by utilizing refrigerant sucking/discharging capacity of a compressor 11 even in a cycle constituted in such manner that the liquid-phase refrigerant is hardly supplied to the heat exchanger acting as an evaporator in the cooling operation mode with respect to the heating operation mode, the air-conditioning of the air-conditioned space can be properly performed in both operation modes. <P>COPYRIGHT: (C)2009,JPO&INPIT |
