Low power electrical fan motor and heater thermal protection cir

Details Low power electrical fan motor and heater thermal protection cir Low power electrical fan motor and heater thermal protection cir

1991-01-24

1992-07-21

Ford, John K.

Heat exchange

Movable heating or cooling surface

Rotary drum

165 62, 165 64, 392360, 219519, 361 32, 361189, F25B 2900, F24F 1102, H02H 504, H01H 900

Patent

active

051314550

ABSTRACT:
An air conditioner has a refrigeration system with a compressor, a motor for air-circulating fans, indoor and outdoor heat exchangers and a four-way valve connected through refrigerant conduits such that it can be operated selectably both for cooling and for heating. An electric heater is also provided for heating. An electrical circuit for the air conditioner has a series connection of (1) a first temperature switch which opens when the temperature of the motor becomes too high, (2) a thermostat of an ordinary kind which places its connector piece in an open or closed position by comparing room temperature with a user-set temperature level, (3) a relay which controls the switching of the compressor of the air conditioner on and off, and (4) a second temperature switch which opens when the temperature of the electric heater becomes too high.

REFERENCES:
patent: Re26596 (1969-06-01), Jobes
patent: 1991280 (1935-02-01), Hynes
patent: 2080797 (1937-05-01), Wiegand
patent: 2080799 (1937-05-01), Wiegand
patent: 2969959 (1961-01-01), Kuhn et al.
patent: 3316960 (1967-05-01), Miner
patent: 3694625 (1972-09-01), Cole
patent: 3731056 (1973-05-01), Becker
patent: 3799245 (1974-03-01), Ferdelman
patent: 3912906 (1975-10-01), McIntosh et al.
patent: 4048666 (1977-09-01), Irie et al.
patent: 4898230 (1990-02-01), Tsuchiyama et al.

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