| 摘要 |
<p>PURPOSE: An atmospheric pressure controlling system is provided to reduce the operational number of at atmospheric pressure controlling valve by stopping the operation of the atmospheric pressure controlling valve. CONSTITUTION: An atmospheric pressure controlling system includes an air supplying valve, an ordinary exhausting valve, an air volume controlling unit, a differential pressure meter, a corrected output operating unit(206), an addition unit, and an air volume stability verifying unit(204). If the air volume stability verifying unit verifies an air volume changing state, the corrected output operating unit implements a controlling operation for controlling atmospheric pressure. If the air volume stability verifying unit verifies an air volume stable state, the corrected output operating unit implements a controlling operation for reducing the operational number of an atmospheric pressure controlling valve. [Reference numerals] (107) Controller; (202) Exhaust air volume controller; (203) Air volume changing unit; (204) Air volume stability verifying unit; (205) Atmosphere stability verifying unit; (206) Corrected output operating unit; (207) Combining unit; (208) Controlling parameter memorizing unit; (209) Operation cycle memorizing unit</p> |
