To suppress heat transfer from a high temperature refrigerant through a valve casing of a four-way selector valve.
The four-way selector valve 30 includes the cylindrical valve casing 32 with both ends closed, a valve seat 34 having a plane seat surface 34a in the valve casing, and a valve element 36 slidable on the seat surface of the valve seat along a cylinder axial direction. A communication passage communicated with an inside chamber nozzle 26, a low pressure nozzle 24 and an outside chamber nozzle 28 is formed in the valve seat, and an opening 22a communicated with a high pressure nozzle 22 is formed on an opposed cylindrical wall. The valve element has a recession 36a on a sliding surface sliding on the seat surface, and an outer wall surface 36b on a side opposite from the sliding surface is formed in a curved shape to have a gap between the cylindrical wall of the valve casing and it. A diameter of an opening part 44 of the valve casing communicated with the high pressure nozzle 22 is enlarged in the cylinder axial direction, and an end of the opening 22a of the valve casing in the cylinder axial direction is positioned on a cylinder end side compared to an end of the outside chamber nozzle 28 side in the state of being communicated with the high pressure nozzle of the valve element 36.
SEKIYA SADAO
IIZUKA YOSHINORI
| JP2006194338A | 2006-07-27 | |||
| JPH11325634A | 1999-11-26 | |||
| JP2002022315A | 2002-01-23 |