Control valve

A control valve, provided in a refrigeration cycle, for controlling a flow of refrigerant, the control valve comprising:

• a body having a lead-in port through which the refrigerant is led in, a lead-out port through which the refrigerant is led out, and a valve hole formed in a refrigerant passage joining the lead-in port to the lead-out port;
• a valve element that opens and closes a valve section by moving toward and away from the valve hole;
• a drive section that generates a drive force used to open and close the valve section;
• a shaft, wherein one end connects to a movable member of the drive section and another end connects to the valve element, the shaft transmitting the drive force, generated by the drive section in a direction of axis line, to the valve element, wherein the shaft is so provided as to run through an insertion hole formed in the body;
• and
• a sliding member that directly or indirectly applies a sliding resistance to an actuation of the valve element,
• wherein the sliding member includes a bulging portion which is provided at an inner portion or an outer portion of the sliding member,
• wherein the sliding member generates the sliding resistance by a friction occurring between a contact face of the shaft or the body which comes in contact with the bulging portion and the bulging portion, and
• wherein a magnitude of the sliding resistance affected to the valve element is varied by a position of the valve element in the direction of axis line, when a position of contact point of the bulging portion and the contact face of the shaft or the body is varied.