Four-way switching valve

摘要

To provide a four-way solenoid valve having a three-way solenoid valve of which non-concentricity between a valve element and a valve hole is small, if any. A core 20 of a three-way solenoid 18 is integrally formed with a refrigerant passage extending axially therethrough, an annular projection forming a valve seat, and a guide for guiding reciprocating motion of a needle 25 forming a valve element. A plug 6 closing a cylinder of a body 1 to define the pressure control chamber 8 is also integrally formed with a valve seat and a guide for guiding reciprocating motion of a needle 27 forming a valve element associated with the valve seat. This causes the needles 25, 27 to be seated on the valve seats associated therewith in respective states guided by the guides substantially concentric with the valve holes, which makes it possible to impart sufficient sealing properties to the valve portions when each valve is closed.