Planar Heating Element for Underfloor Heating

摘要

A heating element includes two flexible plastics layers connected in overlying relationship with first and second conductors each running along the element between the layers the side edges with a row of printed conductive strips at right angles to the conductors. A grounding layer comprising a sheet of foil laminated to a carrier is laminated to the heating element. A reinforcing layer in the form of a bitumen anti-fracture membrane is applied on one surface and a reinforcing layer of a fiber reinforced material is applied on the opposite surface for engagement into a tile adhesive layer. First and second strips of an electrically insulating material are applied over the first and second conductors to define slots allowing insertion into the slots of respective clamp type terminals.

主权项

1. A composite heating element comprising:
a flexible heating element comprising
a flat sheet having a first surface and a second surface each of which is defined by an insulating material;a first conductor and a second conductor for connection thereacross of an electrical voltage;and a conductive material extending between the first and second conductors and located between the first and second surfaces such that the voltage causes a current through the conductive material which generates heat substantially across the full extent of the sheet; a reinforcing layer on one side of the heating element which comprises an anti-fracture membrane wherein the anti-fracture membrane comprises a resilient elastomeric layer with a pressure sensitive adhesive surface on an outer surface thereof covered by a release sheet which can be peeled away to expose the adhesive; and a reinforcing layer of a fiber reinforced material defining an outermost layer on a second side of the heating element, the fiber reinforced material defining a fibrous bonding layer for engagement into a tile adhesive layer; and a grounding layer laminated to the flexible heating element.