| 摘要 |
Adjustable flow electromagnetic valve comprising a closing assembly (8) movable within a chamber (7) wherein opens a passage (3) linked to a high pressure area and a passage (4) linked to a low pressure area. The electromagnetic valve is <u>characterized</u> in that the closing assembly consists of a valve (8) freely movable within said chamber (7). The disk-shaped valve (8) is flat, light and non-deformable and is capable of being automatically brought to its fluid flow position when pressure within the inlet passage (HP) (5) tends to a value approaching a predefined set pressure; the electromagnetic valve is also characterized in that fluid flow through the valve (8) is achieved by means of openings (10) formed in the thickness of said valve, the openings being arranged in a median area outside the circumference of the inlet passage (3) so that the latter can be closed when the valve (8) is electromagnetically returned. It is further characterized by means for adjusting the electromagnetic return force exerted by the electromagnet for placing said valve (8) at a predetermined point between opening and closing to provide a predetermined constant flow, and for alternately shifting it, according to a predetermined frequency, to provide an adjustable alternating flow of the same frequency and of variable amplitude, resulting in sequential, pulsed, rhythmic operation.
|
