Variable speed control of livestock ventilation fans using discr

Details Variable speed control of livestock ventilation fans using discr Variable speed control of livestock ventilation fans using discr

1990-05-21

1992-06-30

Makay, Albert J.

Automatic temperature and humidity regulation

Ventilator type

Electrically actuated

454343, 454239, G05D 2313

Patent

active

051255715

ABSTRACT:
A ventilation assembly (10) for buildings (12) such as livestock barns economically and reliably prevents fan motor operation below the minimum speed required for removal of excess moisture and harmful pollutants from a ventilated building and for adequate motor cooling and lubrication. A preferred embodiment includes a fan unit (14) having a fan (18) motor (20), and a speed-responsive centrifugal switch (22), and also includes a speed control unit (16) having a temperature-responsive speed controller (24) and time delay override relay (28). In operation, the centrifugal switch (22) activates the override relay (28) if the motor (20) drops below a predetermined speed for bypassing the speed controller (24) and impose direct line voltage on motor (20) in order to increase its speed to its maximum for a predetermined time as determined by the time delay setting of the relay (28).

REFERENCES:
patent: 2300418 (1942-11-01), Hall
patent: 2552966 (1951-05-01), Harp
patent: 2586992 (1952-02-01), Rapuano
patent: 2750868 (1956-06-01), Mieczkowski et al.
patent: 4136822 (1979-01-01), Felter
patent: 4250868 (1981-02-01), Frye
patent: 4602739 (1986-07-01), Sutton, Jr.
patent: 4640668 (1987-02-01), Yang
patent: 4734012 (1988-03-01), Dob et al.
patent: 4752210 (1988-06-01), Trent
patent: 4877183 (1989-10-01), Matsuda et al.

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