Infrared radiating element
AssigneeHeraeus Noblelight GmbH
InventorsHolger Zissing, Michael Honig, Lotta Gaab, Jürgen Weber
Life of this patent
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Abstract
An infrared emitter that comprises a cladding tube made of quartz glass that surrounds a heating filament as an infrared radiation-emitting element that is connected via current feedthroughs to an electrical connector outside the cladding tube. To improve the service life and power density, the heating filament comprises a carrier plate with a surface made of an electrically insulating material, whereby the surface is covered by a printed conductor made of a material that generates heat when current flows through it.
Claims17
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including a carrier plate with a surface made of an electrically insulating material and a printed conductor covering the surface, the printed conductor being made of a material that generates heat when current flows through it and the carrier plate including a composite material that is formed by a matrix component and by an additional component in the form of a semiconductor material;
- a cladding tube made of quartz glass that surrounds the heating filament;
- and
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube.
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including a carrier plate with a surface made of an electrically insulating material and a printed conductor covering the surface, the printed conductor being made of a material that generates heat when current flows through it;
- a cladding tube made of quartz glass that surrounds the heating filament;
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube;
- and
- a coating made of opaque highly reflective quartz glass, wherein the cladding tube has a circumference with partial areas of the circumference being covered by the coating.
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including a carrier plate with a surface made of an electrically insulating material and a printed conductor covering the surface, the printed conductor being made of a material that generates heat when current flows through it and the carrier plate having a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm3;
- a cladding tube made of quartz glass that surrounds the heating filament;
- and
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube.
Dependencies are inferred from the claim text.