초록 ▼

An electric radiant heater unit of the kind used in glass ceramic top cookers comprises first and second heater elements disposed adjacent to each other on a base layer of thermal and electrical insulating material, the arrangement being such that, in use, the heat emitted by the second heater eleme

An electric radiant heater unit of the kind used in glass ceramic top cookers comprises first and second heater elements disposed adjacent to each other on a base layer of thermal and electrical insulating material, the arrangement being such that, in use, the heat emitted by the second heater element augments the heat emitted by the first heater element. A peripheral wall of thermal insulating material surrounds the heater elements and a thermal cut-out device extends over both of the heater elements. There is also provided means such as a block of thermal insulating material or a heat sink for shielding the thermal cut-out device in the regions thereof which pass over the second heater element from heat emitted by both the first and second heater elements.

대표청구항 ▼

An electric radiant heater unit for a glass ceramic top cooker, the heater unit comprising: a base layer of electrical and thermal insulating material; first and second bare heater elements disposed adjacent to each other on the base layer, said second heater element being disposed peripherally abou

An electric radiant heater unit for a glass ceramic top cooker, the heater unit comprising: a base layer of electrical and thermal insulating material; first and second bare heater elements disposed adjacent to each other on the base layer, said second heater element being disposed peripherally about said first heater element, said first and second heater elements being arranged such that, in use, heat emitted by the second heater element augments heat emitted by the first heater element; a peripheral wall of thermal insulating material positioned on the base layer and surrounding the heater elements for keeping heat within the peripheral wall; a thermal cut-out device for controllably disconnecting an electrical power source from the heater elements, the thermal cut-out device extending over the first and second heater elements; and means for minimizing heat conduction to the thermal cut-out device in regions thereof which pass over the second heater element from heat emitted by both the first and second heater elements.