ELECTRIC RADIANT HEATER UNIT

摘要

An electric radiant heater unit for a glass ceramic top cooker includes an inner circular heating coil (10) and an outer annular heating coil (12). The two coils are separated by a dividing wall (14) of thermal insulating material and the annular coil (12) is surrounded by a peripheral wall (8) of thermal insulating material. The inner coil (10) may be energised alone or both coils may be energised together. The resistances of the inner and outer coils are such that the watts density within the peripheral wall (8) when both coils are energised is greater than the watts density within the dividing wall (14) when only the inner coil (10) is energised.