Method and apparatus for controlling operation of a compressor

Details Method and apparatus for controlling operation of a compressor Method and apparatus for controlling operation of a compressor

1977-04-26

1979-04-17

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 53, 417290, F04B 4900

Patent

active

041498275

ABSTRACT:
A method in which automatic selection of the mode of operation for a compressor unit is achieved and is dependent on the conditions under which the compressor unit is operated. Depending on the existing compressed air demand and the time sequence thereof, the compressor unit operates in a continuous mode, an intermittent mode, or a regulated mode. During continuous mode operation, the compressor intake is either opened or closed so that the compressor unit operates respectively under zero load, when a minimum pressure condition exists, or full load, when a maximum pressure condition exists. During intermittent mode operation, the compressor unit is turned off when a maximum pressure condition exists and is turned on when a minimum pressure condition exists. During regulated mode operation, the compressor intake is varied between open and closed positions depending on output pressure. Appropriate compressor operation is achieved through the use of a control system including a timing and mode selection device, pressure switches, valves, and the like so that operation of the compressor unit is automatically regulated to reduce power requirements and compressor usage, while proper output pressure is maintained to fulfill compressed air demand.

REFERENCES:
patent: 3232519 (1966-01-01), Long
patent: 3602610 (1971-08-01), Bloom
patent: 3860363 (1975-01-01), Silvern
patent: 3961862 (1976-06-01), Edstrom
patent: 4052135 (1977-10-01), Shoop

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