Heating element unit
AssigneeChromalox, Inc.
InventorsBroman Sillito, Jacob Weller, Cole Alexander
Life of this patent
Estimating the term…
Abstract
A heating element unit for an electric resistance heater comprises: a casing; a heating element within the casing; an electrical supply pin in electrical contact with the heating element; an electrically insulating filler between the heating element and the casing; and an electrically insulating barrier provided between portions of the heating element, the electrical supply pin and/or the casing. The electrically insulating barrier has a greater dielectric strength than the electrically insulating filler, and the dielectric strength of the electrically insulating barrier is greater than about 1500 kV/m (greater than about 40 V/mil).
Claims20
A heating element unit for an electric resistance heater, the heating element unit comprising:
- a casing;
- a heating element within the casing;
- a first electrical supply pin provided at a first end of the heating element unit where the first electrical supply pin is in electrical contact with the heating element;
- a second electrical supply pin provided at said first end of the heating element unit where the second electrical supply pin is in electrical contact with the heating element;
- an electrically insulating filler between the heating element and the casing;
- and
- an electrically insulating barrier provided between portions of the first and second electrical supply pins, the electrically insulating barrier having a greater dielectric strength than the electrically insulating filler, wherein the dielectric strength of the electrically insulating barrier is greater than 1500 kV/m (greater than 40 V/mil) and wherein the electrically insulating barrier is provided in the form of a panel, a sheet or a sleeve.
A method of manufacturing a heating element unit for an electric resistance heating, the method comprising:
- providing a heating element within a casing;
- providing a first electrical supply pin in electrical contact with the heating element at a first end of the heating element unit;
- providing a second electrical supply pin in electrical contact with the heating element at said first end of the heating element unit;
- providing an electrically insulating filler between the heating element and the casing;
- and providing an electrically insulating barrier within the casing between portions of the first and second electrical supply pins;
- the electrically insulating barrier having a greater dielectric strength than the electrically insulating filler, wherein the dielectric strength of the electrically insulating barrier is greater than 1500 kV/m (greater than 40 V/mil) and wherein the electrically insulating barrier is provided in the form of a panel, a sheet or a sleeve.
An electric resistance heater comprising a heating element unit, wherein the heating element unit comprises:
- a casing;
- a heating element within the casing;
- a first electrical supply pin provided at a first end of the heating element unit where the first electrical supply pin is in electrical contact with the heating element;
- a second electrical supply pin provided at said first end of the heating element unit where the second electrical supply pin is in electrical contact with the heating element;
- an electrically insulating filler between the heating element and the casing;
- and
- an electrically insulating barrier provided between portions of the first and second electrical supply pins, the electrically insulating barrier having a greater dielectric strength than the electrically insulating filler, wherein the dielectric strength of the electrically insulating barrier is greater than 1500 kV/m (greater than 40 V/mil) and wherein the electrically insulating barrier is provided in the form of a panel, a sheet or a sleeve.
Dependencies are inferred from the claim text.