Electric flow control valve

Abstract

To improve a structure for restricting a rising position of a rotor of an electric flow rate control valve having the rotor inside of a sealed case and a coil outside of the sealed case. This electric flow rate control valve 100 has the rotor 120 in the sealed case 110. The rotor 120 is fixed to a sleeve 122. The sleeve 122 is engaged with a fixed screw part, and the rotor 120 is vertically moved in accompany with the rotation. When the rotor 120 is raised to the limit, a stopper 152 mounted on the rotor 120 is brought into contact with a stop plate 200 mounted inside of the sealed case 110 to restrict the rotation.

Description

technical field

[0001] The present invention relates to an electric flow control valve, and more particularly to an electric flow control valve for controlling the flow rate of refrigerant fluid used in refrigeration cycles such as refrigeration. Background technique

[0002] The existing electric flow control valve used in the refrigeration cycle is composed of a valve body having a valve seat and a valve body in the valve chamber, and a motor such as a stepping motor arranged on the upper part of the valve body. The airtight case, the stator coil arranged outside the airtight case, and the rotor arranged in the inner chamber of the airtight case. The rotor is formed of, for example, an aluminum sleeve disposed on the inner peripheral side, and a magnet such as ferrite disposed on the outer peripheral side.

[0003] In addition, a long rod-shaped valve shaft extends from within the airtight housing through the valve chamber, one end of which is slidably secured to the slee...

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