HEAT PUMP CYCLE USING EJECTOR

PROBLEM TO BE SOLVED: To sufficiently secure a heat transferring amount of an internal heat exchanger transferring heat from a high pressure side to a low pressure side and to improve efficiency of an ejector, in a heat pump cycle using the ejector properly used for hot water supply. SOLUTION: This heat pump cycle includes the internal heat exchanger 15 having a first high pressure-side heat exchanging section 15a disposed between a radiator 2 and the ejector 3 and exhausting heat with the low pressure side, and a second high pressure-side heat exchanging section 15c disposed between the radiator 2 and a throttle means 22 and exchanging heat with the low pressure side, and enthalpy at an inlet of the ejector, of a refrigerant flowing into the ejector 3 is more than enthalpy at an inlet of the throttle means, of the refrigerant flowing into the throttle means 22, thus preventing the lowering of heat exchange amount from the high pressure side to the low pressure side, and the enthalpy at the inlet of the ejector 3 is increased, so that the recovered amount of expansive energy of the ejector 3 is increased. COPYRIGHT: (C)2010,JPO&INPIT