Controller valve for deicer

DETAILED DESCRIPTION The invention is directed to a system for controlling the inflation of deicer members in response to a timer switch which utilizes a controller valve and an ejector valve, wherein the ejector valve receives a pressurized air which controls the vacuum to such controller valve and in turn to the deicer members.
Such pressurized air source and vacuum are alternately supplied to the deicer members by a controller valve that in the operative condition supplies a vacuum to the deicer members and upon actuation directs pressurized air to the deicer members.
The controller valve has a compensator that equalizes the pressure thereinto to lock the inflated deicer units in their inflated condition while simultaneously blocking further flow of the pressurized air source to the system.
This causes very rapid inflation of de-icer members which efficiently removes ice accumulation from the aircraft leading edge and quickly blocks pressurized turbine bleed air when the de-icer members are sufficiently inflated to prevent overpressurization of such members.