To provide a refrigerant circuit comprising a function for suppressing excess expansion phenomenon or insufficient expansion phenomenon of a refrigerant in an expander, and comprising a multi-directional valve capable of simplifying a piping system and a control system.
The multi-directional valve 5 composed of a casing and a slidable valve element, and comprising eight ports, a throttle function and a bypass passage, is connected with the refrigerant circuit composed of a compressor 1, an outdoor heat exchanger 2, the expander 3 and an indoor heat exchanger 4, thus the piping system and the control system of the refrigerant circuit performing a heating/cooling operation can be simplified. Further the throttle function copes with insufficient expansion phenomenon when it occurs in the expander, and a circulation flow rate of the refrigerant circuit can be adjusted by using the bypass function.
OSHITTO KUMAR DOTTO
JP2003139429A | 2003-05-14 | |||
JPS63308278A | 1988-12-15 | |||
JPH07324844A | 1995-12-12 | |||
JPH11325634A | 1999-11-26 | |||
JP2002022315A | 2002-01-23 |