SOLENOID VALVE

摘要

A solenoid valve includes a main valve having a valve seat and a main valve body configured to open or close a main flow passage, a pilot passage that branches from the main flow passage, an orifice provided in the pilot passage, a back-pressure chamber configured to bias the main valve body to a closing direction by virtue of an internal pressure, a pilot valve configured to control an internal pressure of the back-pressure chamber, and a solenoid configured to control a valve opening pressure of the pilot valve. There is a time difference between a valve opening timing of the main valve and a valve opening timing of the pilot valve such that the valve opening timing of the main valve is delayed from the valve opening timing of the pilot valve.

主权项

1. A solenoid valve comprising:
a main valve having a valve seat provided in a main flow passage, and a main valve body seated on or unseated from the valve seat to open or close the main flow passage; a pilot passage that branches from the main flow passage; an orifice provided in the pilot passage; a back-pressure chamber connected to the pilot passage downstream from the orifice, the back-pressure chamber being configured to bias the main valve body to a closing direction by virtue of an internal pressure; a pilot valve disposed in the pilot passage downstream from a connection point to the back-pressure chamber, the pilot valve being configured to control an internal pressure of the back-pressure chamber; and a solenoid configured to control a valve opening pressure of the pilot valve, wherein there is a time difference between a valve opening timing of the main valve and a valve opening timing of the pilot valve such that the valve opening timing of the main valve is delayed from the valve opening timing of the pilot valve.