Infrared heater and infrared processing device
AssigneeNGK Insulators, Ltd.
InventorsTakeshi Komaki, Taiki Kinnan, Yoshio Kondo
Life of this patent
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Abstract
An infrared heater 10 includes a heating element 40 that emits infrared radiation when heated and that is capable of absorbing infrared radiation in a predetermined reflection wavelength range, and a filter unit 50 that is disposed so as to be separated by a first space 47, which is open to an outside space, from the heating element 40. The filter unit 50 includes one or more transmission layers (a first transmission layer 51) that transmit at least a part of the infrared radiation from the heating element 40, and a reflective section (the first transmission layer 51) that reflects infrared radiation in the reflection wavelength range toward the heating element 40.
Claims16
An infrared heater comprising:
- a heating element that emits infrared radiation when heated and that is capable of absorbing infrared radiation in a predetermined reflection wavelength range, the heating element being disposed in a case having an upper surface portion and right and left side surface portions, at least one of the side surface portions extending a first distance away from the upper surface portion to a distal end;
- and
- a filter unit including one or more transmission layers that transmit at least a part of the infrared radiation emitted from the heating element and a reflective section that reflects infrared radiation in the reflection wavelength range toward the heating element, the one or more transmission layers including a closest transmission layer, the closest transmission layer being the transmission layer of the one or more transmission layers which is positioned closest to the heating element, and being disposed a second distance, greater than the first distance, away from the upper surface portion, thereby defining a first space between the heating element and the closest transmission layer, which is open to an outside space, via at least one opening defined between the closest transmission layer and the distal end of the at least one of the side surface portions;
- wherein an infrared emissivity of a surface portion of the heating element facing the closest transmission layer is higher than that of a surface portion of the heating element facing away from the closest transmission layer.
An infrared heater comprising:
- a heating element that emits infrared radiation when heated and that is capable of absorbing infrared radiation in a predetermined reflection wavelength range, and
- a filter unit including one or more transmission layers that transmit at least a part of the infrared radiation emitted from the heating element and a reflective section that reflects infrared radiation in the predetermined reflection wavelength range toward the heating element, the filter unit being disposed so as to be separated by a first space, which is open to an outside space, from the heating element,
- wherein the one or more transmission layers include a first transmission layer,
- the first transmission layer also serves as a part of the reflective section,
- the first transmission layer includes a selective reflection region that has reflection characteristics of reflecting infrared radiation in the reflection wavelength range and that transmits at least a part of the infrared radiation emitted from the heating element and a transmission region that transmits infrared radiation in the reflection wavelength range, the selective reflection region being disposed closer than the transmission region to a center of the heating element, the transmission region being disposed farther than the selective reflection region from the center of the heating element, and
- the reflective section includes a transmission-layer-side reflective member that is disposed on a side opposite to the heating element when seen from the first transmission layer and that has a reflective surface inclined with respect to a surface of the transmission region facing the heating element, the reflective surface reflecting toward the heating element infrared radiation in the reflection wavelength range passed through the transmission region.
Dependencies are inferred from the claim text.