Heating apparatus

Details Heating apparatus Heating apparatus

H - Electricity

05

B

309/82, 309/86

H05B 3/74 (2006.01) H05B 1/02 (2006.01) H05B 39/00 (2006.01)

Patent

CA 1238074

ABSTRACT OF THE DISCLOSURE A heating unit includes two tubular tungsten-halogen lamp, each having a tungsten filament. The lamps are supported within a ring of ceramic fibre material and the unit is preferably mounted beneath an infra-red-transmissive cooktop to define a hotplate area of a cooking hob. A control circuit provides a range of discrete power outputs of the lamps, each power output corresponding to a power control setting set by a user of the cooking hob. The circuit includes a phase control circuit for switching power to the lamps at a predetermined phase angle to achieve one or more of the lower power outputs.

489414

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