Thermostatically controlled plural heat output portable electric

Details Thermostatically controlled plural heat output portable electric Thermostatically controlled plural heat output portable electric

1976-06-24

1978-08-29

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

126110AA, 219366, 219370, 219374, 219376, 219377, 219486, 219508, F24H 304, H05B 102

Patent

active

041106008

ABSTRACT:
A portable electric space heater has a case that surrounds separate electric heating elements, and the case has separated upper and lower airflow openings. A control switch allows manual selection of two different operating cycles, respectively suited for heater use in a large room requiring heater outputs approximately 65 to 100% of maximum to maintain a comfort level, and in a small room requiring heater outputs of only 20 to 100% of maximum. Thermostatic controls respond to the sensed ambient air temperatures to shift the heater operation automatically, in either operating cycle, for maximum heat output, for a lower modulated heat output, and for no heat output. Simultaneously with this modulated heat output, air moving means located in the case is operated at different speeds, at maximum speeds for the high heat outputs and lesser speeds or is even stopped for the lower or no heat outputs. The operating air moving means causes the air heated to discharge from the heater case out the lower openings; whereas the air moving means does not operate in a preferred lowest heat output condition to have convective heated air discharge out the upper case openings. Specific control circuits utilize the heating elements as voltage dividers to alter the output speeds of a single speed motor powering the air moving means as indicated, and also to modulate the heat outputs.

REFERENCES:
patent: 1798290 (1931-03-01), Winner et al.
patent: 2647198 (1953-07-01), Lautner
patent: 3523180 (1970-08-01), Kennedy
patent: 3855450 (1974-12-01), O'Connor

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