| 摘要 |
PURPOSE: A control device of air compressor using pneumatic pressure control relay is provided to accurately control pneumatic pressure. CONSTITUTION: A pneumatic pressure control valve(3) and a double-acting air cylinder(5) are connected to a pipe in parallel. The double-acting air cylinder is connected with a relay(7) electrically connected with an air compressor(2) and having a return spring(6). A contacting point(7a) of the relay is cut off to stop the air compressor when pressure in an air tank(1) increases over fixed value. Pressure on which the air compressor is turned on/off is controlled by adjusting tension of the return spring.
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