Positive temperature coefficient thermistor heater device

Details Positive temperature coefficient thermistor heater device Positive temperature coefficient thermistor heater device

H - Electricity

05

B

H05B 3/20 (2006.01) C04B 35/46 (2006.01) F24D 13/02 (2006.01) G05D 23/24 (2006.01) H01C 7/02 (2006.01) H05B 3/14 (2006.01) H05B 3/26 (2006.01)

Patent

CA 2094498

A panel heater includes a metal plate (2) whose lower side is provided with a PTC ceramic (1). The area corresponding to the PTC ceramic on the upper side is covered with good heat insulator or air space (4). Materials (3) for conducting the heat of the metal plate are provided above the parts other than the ones above the PTC ceramic respectively, and further, a finishing plate (5) is provided on the top face of the metallic plate (2). Favorably, recessed type straight grooves are formed on the metallic plate (2) at required spaces by corrugating it, and on the undersides of the straight grooves the PTC ceramics (1) are provided, and in the straight grooves good heat insulator or air spaces (4) are provided, and further, the finishing plate (5) is provided on the top face of the metal plate (2). Thereby, a large load can be supported by a simple structure, and moreover, the panel heater having no local overheating can be obtained.

Panneau chauffant comportant une plaque de métal (2) dont la partie inférieure est dotée de corps en matériau céramique CPT (1). La surface correspondant aux corps en matériau céramique à la partie supérieure de la plaque est recouverte d'un bon isolant thermique ou d'une lame d'air isolante (4). Des matériaux (3) thermiquement conducteurs sont utilisés pour recouvrir les pièces autres que les corps en matériau céramique CPT; un revêtement de finition (5) est utilisé pour recouvrir la face supérieure de la plaque métallique (2). De préférence, la plaque de métal (2) comporte un réseau de rainures rectilignes régulièrement espacées, sous lesquelles sont regroupés les corps en matériau céramique CPT (1); à l'intérieur des rainures, les vides d'air (4) assurent une bonne isolation thermique; le revêtement de finition (5) recouvre la partie avant de la plaque de métal (2). Malgré sa simplicité structurelle, le panneau chauffant peut supporter une charge importante tout en éliminant le risque de surchauffe localisée.

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