主权项 |
1. A passage-switching valve having a stator and a rotor, the rotor being rotatable while sliding relative to the stator, the stator having a plurality of passages whose ends are open on a sliding surface on which the rotor is made to rotate and slide, and the rotor having a passage groove for connecting two or more of the plurality of passages, wherein:
the rotor, at an edge of the passage groove, is in contact with the sliding surface of the stator at a contact angle greater than 120°. |