Single coil dual solenoid valve

摘要

A single coil dual solenoid valve includes: first and second moving cores having connected to respective ends thereof first and second valve bodies; first and second plunger tubes having slidably inserted thereinto the first and second moving cores, respectively; first and second stationary cores disposed at respective opposite ends of the first and second plunger tubes so as to lie opposite to the first and second moving cores, respectively; a first frame disposed to connect the first and second stationary cores; a second frame disposed to connect one end of the first and second plunger tubes, respectively; and a single solenoid disposed to enclose one of the first and second plunger tubes. By activating the solenoid, the first and second moving cores are sucked to move toward the respective first and second stationary cores, whereby the first and second valve bodies are changed over.

主权项

1. A single coil dual solenoid valve comprising:
a first valve body and a second valve body; a first moving core and a second moving core having connected to one end thereof the first valve body and the second valve body, respectively; a first plunger tube and a second plunger tube having slidably inserted thereinto from open end provided at one end portion thereof the first moving core and the second moving core, respectively; a first stationary core and a second stationary core disposed at an opposite end portion of the first plunger tube and of the second plunger tube so as to lie opposite to the first moving core and the second moving core, respectively; a first buffer member and a second buffer member attached to the first moving core and the second moving core or to the first stationary core and the second stationary core so as to absorb shocks when the first moving core and the second moving core come into contact with the first stationary core and the second stationary core, respectively; a first valve spring and a second valve spring for biasing the first moving core and the second moving core away from the first stationary core and the second stationary core, respectively; a first frame disposed to connect the first stationary core and the second stationary core; a second frame disposed to connect the one end portion of the first plunger tube and of the second plunger tube, respectively; and a single solenoid disposed to enclose one of the first plunger tube and the second plunger tube, wherein a magnetic path is formed starting from the first moving core through the first stationary core, the first frame, the second stationary core, the second moving core, the second frame and back to the first moving core such that, when the solenoid is activated, each of the first moving core and the second moving core is sucked to move against a biasing force of each of the first valve spring and the second valve spring toward the first stationary core and the second stationary core, respectively, thereby changing over the first valve body and the second valve body; and further comprising a valve casing containing therein: a first valve chamber for housing therein the first valve body; a second valve chamber for housing therein the second valve body, the first valve chamber and the second valve chamber being disposed in parallel with each other; a first valve seat which faces the first valve chamber and against which the first valve body can be seated; a second valve seat which faces the second valve chamber and against which the second valve body can be seated, such that, when the solenoid is activated, one of the first valve body and the second valve body gets seated against corresponding one of the first valve seat and the second valve seat and that, when the solenoid is deactivated, the other of the first valve body and the second valve body gets seated against the other of the corresponding first valve seat and the second valve seat, whereby a flow rate is changed over depending on the activation or deactivation of the solenoid.