Heater, a method of manufacturing the same, and an...

H - Electricity – 05 – B

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H05B 3/02 (2006.01) A47G 1/02 (2006.01) H05B 3/06 (2006.01) H05B 3/14 (2006.01) H05B 3/84 (2006.01)

Patent

CA 2095874

A heater includes a heating element made of a PTC thermistor, electrodes formed on upper and lower surfaces of the heating element, flat metallic terminals connected to the electrodes, lead wires connected to inner surfaces of the metallic terminals that face each other, and an insulating case for covering exposed portions of the heating element, electrodes, and of the metallic terminals and the connections between the lead wires and the metallic terminals. With this structure, since no bumps are produced on the outer surfaces of the metallic terminals by connecting the lead wires to the metallic terminals, the thickness of the insulating case over the metallic terminals is reduced. This allows a reduction in the thickness of the heater and an improved heat transfer between the heating element and the heated object. A method of manufacturing the heater includes the steps of forming a heating unit by connecting the flat metallic terminals to the electrodes and connecting the lead wires to the metallic terminals, disposing the heating unit on a predetermined position of the base section of the insulating case, and sealing the exposed portions of the heating unit in the insulating case by injection-molding a cover section of the insulating case with insulating material after disposing the base section in a mold. This method enables the heating unit to be easily covered with the insulating case, thereby facilitating the manufacture of the heater.

Radiateur comprenant un élément chauffant constitué d'une thermistance CTP, des électrodes sur les faces supérieure et inférieure de l'élément chauffant, des bornes métalliques plates connectées aux électrodes, des fils connectés aux faces intérieures des bornes métalliques, qui se font face, et un boîtier isolant protégeant les parties exposées de l'élément chauffant, des électrodes et des bornes métalliques ainsi que les connexions des fils aux bornes métalliques. Grâce à cette structure, comme il n'y a pas de saillies sur les faces extérieures des bornes métalliques dues à la connexion des fils à ces dernières, l'épaisseur du boîtier isolant au-dessus des bornes métalliques se trouve être réduite. Cela permet la réduction de l'épaisseur du radiateur et un transfert de chaleur amélioré entre l'élément chauffant et l'objet chauffé. Une méthode de fabrication du radiateur comprend les étapes de formage du bloc de chauffage en connectant les bornes métalliques plates aux électrodes et en connectant les fils aux bornes métalliques, en disposant le bloc de chauffage à un emplacement prédéterminé de la base du boîtier isolant et en protégeant les parties exposées du bloc de chauffage dans le boîtier isolant en fabriquant un couvercle pour le boîtier isolant par moulage par injection d'un matériau isolant, après avoir placé la base du boîtier dans un moule. Cette méthode facilite la mise en place du boîtier isolant sur le bloc de chauffage, donc la fabrication du radiateur.

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