Pilot valve assembly

A pilot valve assembly comprises a sleeve structure, a static iron core, a movable iron core, an ejector rod and a fixing device, wherein the sleeve structure is a hollow cuboid metal structure or a hollow oblong metal structure with two penetrating ends, the sleeve structure is provided in a coil skeleton through inner hole, and the outer ring surface is attached to the inner wall of the coil skeleton; the tail end of the static iron core is inserted on the left side of the through inner hole of the sleeve structure, the front end of the static iron core is protruded with a first guide head,the static iron core is internally and axially provided with a through hole for the ejector rod to pass through, the movable iron core is set in the through inner hole of the sleeve structure and located on the right side of the static iron core, the left end of the movable iron core abuts against the right end of the ejector rod, the right end of the movable iron core is connected to the fixing device, and at least one o