To improve performance and efficiency of a refrigeration cycle to be used for cooling such as cooling, refrigerating, and freezing a supercritical refrigeration cycle by increasing the specific enthalpy difference of a refrigerant in a vaporizer, in a refrigeration cycle device which uses gas, such as carbon dioxide, as a refrigerant.
A two-stage compression and two-stage expansion supercritical refrigeration cycle device cools a main flow 11 and heats a branch flow 12 by a heat exchanger 3 between a radiator 1 and a high stage-side expansion valve 2. A branch flow 12' which is in a heated gas phase and refrigerant vapor self-vaporized in a gas-liquid separator 5 after being reduced in pressure by the high stage-side expansion valve 2 are sucked by an ejector 6 to be raised in pressure up to intermediate pressure. The refrigerant pressure in the gas-liquid separator 5 is made lower than the intermediate pressure to decrease the specific enthalpy of a refrigerant flowing in the vaporizer 1 down to saturated liquid enthalpy under pressure lower than the intermediate pressure.
JP2010525293A | 2010-07-22 | |||
JP2008082693A | 2008-04-10 | |||
JP2007057156A | 2007-03-08 | |||
JPH10197077A | 1998-07-31 | |||
JP2010525293A | 2010-07-22 | |||
JP2008082693A | 2008-04-10 | |||
JP2007057156A | 2007-03-08 | |||
JPH10197077A | 1998-07-31 |
US20090095003A1 | 2009-04-16 | |||
US20060065011A1 | 2006-03-30 | |||
US20090095003A1 | 2009-04-16 | |||
US20060065011A1 | 2006-03-30 |
Miaki Kametani
Koji Hagiwara
Kenji Wada