Control circuit for a heating unit

Details Control circuit for a heating unit Control circuit for a heating unit

H - Electricity

05

B

309/82, 309/86

H05B 3/74 (2006.01) F24C 15/10 (2006.01)

Patent

CA 1273389

ABSTRACT A CONTROL CIRCUIT FOR A HEATING UNIT A control circuit, for a heating unit including two or three lamps emissive of infra-red radiation, includes a microprocessor for selectively effecting phase and burst-fire control of power supplied to the lamps to generate a desired heat output set by user-operable controls. The circuit also includes switching means to achieve series and/or parallel arrangements of the lamps to generate different power outputs. The microprocessor is also arranged to provide phase control of power to the lamps intermediate periods of energisation of the lamps during burst-fire control or to alternate between two different power outputs generated by series and/or parallel arrangements of the lamps to achieve an average output.

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