ELECTROMAGNETIC CONTROL VALVE

摘要

An electromagnetically-driving section, an adjusting spring (setting adjustment section), a pressure equalizing chamber, and a diaphragm (pressure sensing section) are disposed opposite a valve port on an axis line L of the valve port with respect to the valve body therebetween. The valve body, and an aperture, a vertical path, and a lateral path in the valve member (pressure equalizing path) ensure electrical continuity between the valve port and the pressure equalizing chamber. The valve port is coaxial with the second port. A tapered surface is formed in the lower end portion of the valve body, and a helical compression spring causes a sliding surface of a spring holding member which has a spherical shape to abut on the tapered surface.

主权项

1. An electromagnetic control valve comprising:
a valve chamber and a valve port formed between a first port and a second port; and an electromagnetically-driving section driving a valve body in the valve chamber to open or close the valve port, wherein a force applied to the valve body due to a difference in pressure between the first port and the second port is cancelled by a force applied to the valve body due to a difference in pressure between the valve chamber and a pressure equalizing chamber which is added to a pressure sensing section, an opening of the valve port varies in a proportional manner, depending on a balance between an electromagnetic force from the electromagnetically-driving section and a spring force of an adjusting spring, the electromagnetically-driving section, the adjusting spring, the pressure equalizing chamber, and the pressure sensing section are disposed opposite the valve port on an axis line of the valve port with respect to the valve body therebetween, and a pressure equalizing path that makes the valve port communicate with the pressure equalizing chamber is formed in a valve member having the valve body.