Rotary control valve

A rotary control valve comprising:

• a rotor including a tubular part structured to rotate and an opening communicating with an inner peripheral side and an outer peripheral side of the tubular part;
• a seal member including a contact face, a rear end face, an internal passage, a cut-off part, and a ridge, wherein:
• the contact face is structured to be in sliding contact with the outer peripheral side of the tubular part, and has an arc-curved surface shaped to fit with the outer peripheral side of the tubular part;
• the internal passage is structured to communicate with the opening of the tubular part;
• and
• the cut-off part is formed at one of a preceding-side end and a following-side end of the arc-curved surface in a rotational direction of the tubular part, and is structured to be out of contact with the outer peripheral side of the tubular part, so as to define the ridge in the contact face;
• a biasing member disposed at the rear end face of the seal member opposite to the contact face of the seal member, and structured to cause the contact face of the seal member to be pressed on the outer peripheral side of the tubular part;
• and
• a drive mechanism structured to rotate the rotor.

A rotary control valve comprising:

• a rotor including a tubular part structured to rotate and an opening communicating with an inner peripheral side and an outer peripheral side of the tubular part;
• a seal member including a contact face, an internal passage, and a restoring-function part, wherein:
• the contact face is structured to be in sliding contact with the outer peripheral side of the tubular part, and has an arc-curved surface shaped to fit with the outer peripheral side of the tubular part;
• the internal passage is structured to communicate with the opening of the tubular part;
• and
• the restoring-function part is formed in the arc-curved surface, and is structured to restore the contact face to a regular attitude in response to action of pressing the contact face on the outer peripheral side of the tubular part, in case that the seal member fails to be installed such that the contact face is in close contact with the outer peripheral side of the tubular part in the regular attitude;
• a biasing member disposed at a face of the seal member opposite to the contact face of the seal member, and structured to cause the contact face of the seal member to be pressed on the outer peripheral side of the tubular part;
• and
• a drive mechanism structured to rotate the rotor.