PTC (positive temperature coefficient) heat element for fitting in heat zones has a PTC heat register with several PTC elements fitted in series and/or parallel and electrical insulation fitted between PTC elements to form heat zones.

摘要

A PTC heat register has several positive temperature coefficient (PTC) elements fitted in series and/or parallel. An electrical insulation (18,19) is fitted between two or more PTC elements fitted in series and/or parallel in order to form heat zones (A,B,C,D) that are essentially independent of each other.