Patent ID: 9194505
Filing Date: 2015-11-24
Classification: F16K,G01N,Y10T

Abstract:
1. A flow channel switching valve comprising: a housing that has an internal space, and includes connection ports connecting flow channel piping in an outer surface, the connection ports leading to the internal space through flow channels; a stator that is provided inside the internal space of the housing, has a plane fixed to the housing to form one wall surface of the internal space, and is provided with a plurality of connection holes in the plane, the plurality of connection holes being end portions of the flow channels leading the connection ports to the internal space; a rotor that is arranged inside the internal space so as to come into contact with the plane of the stator where the connection holes are provided while keeping liquid tightness, and is provided with a groove in a surface in contact with the stator, the groove forming a flow channel selectively connecting any one pair of the connection holes; a rotor drive portion that includes a rotor drive shaft having, at a forefront, a rotor holding portion that holds the rotor, and is arranged perpendicular to the plane of the stator where the connection holes are provided, the rotor drive portion rotating the rotor drive shaft to thereby rotate the rotor while sliding the rotor on the stator; a depressed portion receiving liquid at a position below the rotor inside the housing; and an opening provided in the housing to guide the liquid received by the depressed portion outside the housing.