FIELD OF INVENTION
[001] The present disclosure relates to fluid flow controlling device and, more particularly,
to a digital control valve system having an improved piston for fluid flow control.
BACKGROUND OF THE INVENTION
[002] The subject matter discussed in the background section should not be assumed to be
prior art merely because of its mention in the background section. Similarly, a problem
mentioned in the background section or associated with the subject matter of the background
section should not be assumed to have been previously recognized in the prior art. The subject
matter in the background section merely represents different approaches, which in and of
themselves may correspond to implementations of the claimed technology.
We claim:
1. A digital control valve system (100) for controlling fluid flow, comprising:
a cylindrical valve chamber (120);
a piston (302) housed within the cylindrical valve chamber (120), the piston (302)
having:
a body section (308), and an annular sealing ring (310) protruded to direct
pressure at an annular area towards the body section (308);
a plurality of solenoid valves (110, 112), including:
a normally open (NO) solenoid valve (110) connecting the valve chamber (120)
to an upstream pressure (P1);
a normally closed (NC) solenoid valve (112) connecting the valve chamber
(120) to a downstream pressure (P2);
an electrical controller (122) configured to selectively energize and de-energize the
solenoid valves (110, 112) to create differential pressure in the valve chamber (120) for
actuating the opening and closing of the piston (302); and
at least one dampening mechanism within the cylindrical valve chamber (120) for
regulating a movement of the piston (302);
wherein during the upstream pressure (P1), the piston (302) is configured to direct fluid
flow pressure onto the annular area of the protruded annular sealing ring (310) to distribute
pressure to a larger surface area of the piston (302).