Polymeric immersion heating element with skeletal support

Details Polymeric immersion heating element with skeletal support Polymeric immersion heating element with skeletal support

H - Electricity

05

B

H05B 3/40 (2006.01) H05B 3/04 (2006.01) H05B 3/82 (2006.01)

Patent

CA 2265674

Electrical resistance heating element, hot water heaters containing such elements, and method of preparing such elements are provided. The electrical resistance heating elements can be disposed through a wall of a tank for heating fluid, such as water. They include a skeletal support frame (70), having a first supporting surface (69), thereon. They also include a resistance wire (66) wound onto the first supporting surface (69) and preferably connected to at least a pair of terminal end portions. The support frame (70) and resistance wire (66) are then hermetically encapsulated and electrically insulated within a thermally conductive polymeric coating (64). The skeletal support frame (70) improves injection molding operations for encapsulating the resistance wire (66), and can include heat transfer fins (62) for improving thermal conductivity.

Elément chauffant à résistance électrique, chauffe-eau ayant ce type d'élément, et procédé de fabrication de cet élément. Ledit élément peut être placé à travers une paroi de cuve pour chauffer un fluide, par exemple, de l'eau. L'élément a un squelette (70) de support, doté d'une première surface de support (69). Il a un fil de resistance (66) enroulé autour de ladite surface (69), de préférence relié au moins à une paire de portions terminales. Le support (70) et le fil (66) en question sont ensuite hermétiquement encapsulés et isolés électriquement dans un revêtement polymérique thermoconducteur (64). Le support (70) améliore les opérations de moulage par injection pour encapsuler le fil (66), et il peut comporter des ailettes d'échange thermique (62) optimisant la conductivité thermique.

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