Control valve

A control valve comprising:

• a valve housing which has an inflow port for causing a liquid to flow in from outside and a discharge port for discharging a liquid that has flowed in to the outside;
• a joint member which is joined to a circumferential edge of the discharge port;
• a valve body which is rotatably disposed inside the valve housing and has a circumferential wall portion in which a valve hole for communication between the inside and the outside is formed;
• and
• a sealing tube member in which one end side communicates with the discharge port, and a valve sliding contact surface slidably abutting an outer surface of the circumferential wall portion at a position where at least a part of the valve body overlaps a rotation path of the valve hole is provided on the other end side,
• wherein the valve body allows an outflow of a liquid to the discharge port from an nner region of the circumferential wall portion hen at a rotation position where the valve hole and the sealing tube member are allowed to communicate with each other, and the valve body controls or blocks an outflow of a liquid to the discharge port from the inner region of the circumferential wall portion when at a rotation position where the valve hole and the sealing tube member are inhibited from communicating with each other,
• wherein a seal ring which receives a liquid pressure inside the valve housing and comes into tight contact with the joint member and the sealing tube member provided between the joint member and the sealing tube member,
• wherein the sealing tube member has a biasing pressure receiving surface receiving the liquid pressure inside the valve housing in a direction along a direction of the valve body,
• wherein the seal ring is disposed at a position where the sealing tube member is not pressurized in the direction of the valve body, and
• wherein an area of the valve sliding contact surface is set to be larger than an area of the biasing pressure receiving surface.