Control Valve Driven By Stepping Motor

摘要

A control valve according to an embodiment includes: a body having an inlet port, an outlet port, and a valve hole that communicates the inlet port and the outlet port together; a valve element configured to open and close a valve section; a drive mechanism configured to drive the valve element; a stepping motor having both a rotor for operating the drive mechanism and a stator for rotationally driving the rotor; and a can that is a cylindrical member covering a space where the valve element and the drive mechanism are arranged and involving the rotor and that defines a pressure space and a non-pressure space. The can is fixed to the body with a ring screw, and the stator is arranged at an outer circumference of the can and fixed to the body with a screw member.

主权项

1. A control valve driven by a stepping motor, comprising:
a body having an inlet port for introducing a refrigerant from an upstream side, an outlet port for delivering a refrigerant to a downstream side, and a valve hole that communicates the inlet port and the outlet port together; a valve element configured to open and close a valve section by moving toward and away from the valve hole; a drive mechanism configured to drive the valve element in an opening and closing direction of the valve section; a stepping motor including both a rotor for operating the drive mechanism and a stator for rotationally driving the rotor; and a can that is a cylindrical member covering a space where the valve element and the drive mechanism are arranged and involving the rotor and that defines a pressure space where pressure of the refrigerant acts and a non-pressure space where pressure of the refrigerant does not act, wherein the can is fixed to the body with a first fixing means, and wherein the stator is arranged at an outer circumference of the can and fixed to the body with a second fixing means.