Electricity: motive power systems – Automatic and/or with time-delay means – Responsive to thermal conditions
Patent
1992-04-21
1993-05-11
Ro, Bentsu
Electricity: motive power systems
Automatic and/or with time-delay means
Responsive to thermal conditions
307132T, H05B 102
Patent
active
052104770
ABSTRACT:
A fan control board having a central low voltage wiring center as well as a safety interlock for electric heaters. The interlock uses diodes to insure proper fan operation in the event of miswiring of the heater sequencers. Another feature is a quick connect for the time delay relay which permits easy insertion and removal thereof for replacement and/or cleaning. Diode circuits are provided in both the circuit to normally power the fan motor as well as in the circuit to power the PTC resistor which closes the fan motor circuit with the circuit which powers the PTC resistor also being connected across the fan motor circuit to provided rectified power to the fan circuit and permit the fan motor to turn on concurrently with the application of power to the PTC resistor to prevent the heater from being turned on prior to the fan. Circuitry to control each of multiple furnace heater elements is also applied via rectification circuitry to the fan motor circuitry to cause operation of the fan motor regardless of the order of operation of the heater elements of a furnace. There is also provided a quick connect and time delay relay design to allow easy insertion and removal of the relay for cleaning and/or replacement by having three spaced contacts on the housing surface of the relay with the quick connect having resilient opposed C-shaped terminal for frictionally locking one of the relay contacts therein and a pair of terminals at opposite ends thereof, at least one being resilient for contacting the other contacts on the housing.
REFERENCES:
patent: 3586869 (1971-06-01), Kompelien
patent: 4307775 (1981-12-01), Saunders et al.
patent: 4350287 (1982-09-01), Richards
patent: 4635845 (1987-01-01), Kompelien
patent: 5100053 (1992-03-01), Manson et al.
Hayden Kenneth L.
Rowlette Mitchell R.
Steffes Gary J.
Baumann Russell E.
Donaldson Richard L.
Grossman Rene E.
Ro Bentsu
Texas Instruments Incorporated
LandOfFree
Fan control and diode interlock for electric heaters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan control and diode interlock for electric heaters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan control and diode interlock for electric heaters will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1353551