Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Patent
1978-04-19
1980-06-03
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
123 4102, 123 4144, 165 42, F04B 4906, B60H 304, F01P 512
Patent
active
042059445
ABSTRACT:
A device for controlling blower motors for air conditioning units especially for those installed in vehicles. For eliminating changes in air flow due to changing dynamic pressure at the blower air inlet; the blower is controlled by maintaining blower motor current constant according to an adjustable set point and according to the dynamic pressure a pressure detector at the blower inlet the set point is varied to control blower rpm in response to changing dynamic pressure.
REFERENCES:
patent: 2991405 (1961-07-01), Carlson
patent: 3439622 (1969-04-01), Welty
patent: 3478532 (1969-11-01), Cootey et al.
patent: 3555356 (1971-01-01), Kaiser
patent: 3613391 (1971-10-01), Hawter
patent: 3633376 (1972-01-01), Miner
patent: 3697781 (1972-10-01), MacMillan
patent: 3735602 (1973-05-01), Ramsey
patent: 3812409 (1974-05-01), Diwger
patent: 3868554 (1975-02-01), Konrad
Fehr Werner
Rohrberg Klaus
Freeh William L.
Suddeutsche Kuhlerfabrick Julius Fr. Behr
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