Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent
1976-12-23
1978-10-31
Wayner, William E.
Automatic temperature and humidity regulation
Hot-air furnace
Air and fire control
34 54, F26B 2100
Patent
active
041230000
ABSTRACT:
An apparatus for starting a hot air recirculating furnace system. Reduced power is applied to the motor which drives the recirculating fan to cause the motor to turn at a reduced speed. The furnace is ignited during the application of the reduced power to the motor. As the temperature in the furnace increases, the warmer air recirculates and the load on the fan decreases. The power supplied to the fan motor is then increased, thereby increasing its speed as a function of the increased temperature as sensed by a thermostat in the furnace system. Full power is applied to the fan motor when the sensed temperature reaches a selected desired maximum. The apparatus and the method eliminate squeal of the belt which drives the fan and reduce wear common to those techniques which apply full voltage to the recirculating fan at furnace start-up. Also, this system reaches the desired operating temperature more quickly than prior art systems as a result of a reduced recirculating airflow during a longer acceleration period.
REFERENCES:
patent: 1558848 (1925-10-01), Doble, Jr.
patent: 2038578 (1936-04-01), Lamb
patent: 2044034 (1936-06-01), Watson et al.
patent: 2291145 (1942-07-01), Buck
patent: 2329636 (1943-09-01), McGrath
patent: 2800282 (1957-07-01), Calahan
Modine Manufacturing Company
Tapolcai, Jr. William E.
Wayner William E.
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