An electric heater includes a substrate (an insulating material capable of forming a conductor pattern on a surface of an insulating substrate), a first plane heating element formed on one surface of the substrate, and a second plane heating element formed on one surface of the substrate to be located outside the first plane heating element. The first plane heating element includes a first pattern portion connecting a start point with an end point located in a first zone, a pair of first electrodes located outside the first zone, and a pair of first connectors connecting the first pattern portion with the first electrodes. The second plane heating element includes a second pattern portion located in a second zone surrounding the first zone and connecting a start point with an end point, and at least some of the first connectors are located in the second zone.

An electric heater includes a substrate (an insulating material capable of forming a conductor pattern on a surface of an insulating substrate), a first plane heating element formed on one surface of the substrate, and a second plane heating element formed on one surface of the substrate to be located outside the first plane heating element. The first plane heating element includes a first pattern portion connecting a start point with an end point located in a first zone, a pair of first electrodes located outside the first zone, and a pair of first connectors connecting the first pattern portion with the first electrodes. The second plane heating element includes a second pattern portion located in a second zone surrounding the first zone and connecting a start point with an end point, and at least some of the first connectors are located in the second zone.

A heating element (18) for a heating element carrier (10) of an electrically operated heat gun (100). The heating element carrier (10) is designed to receive the heating elements (18). The heating elements comprise a resistance wire (34) with a cross-sectional surface A and a cross-sectional perimeter U, where (4πA)U2<1.

Heating Mechanism For Tools is an ingenious and practical invention of a heated tool rack which includes: a first steel plate; a second steel plate, wherein each steel plate includes a cooperating receiving rack for wrenches; a power source attached to each plate; a first charge on the first plate; and a second charge on the second plate. The cooperating racks include a first receiving rack and a second receiving rack, wherein a lineal graduating resistive divider of a cleaving type and a planer type lies between the first steel plate on a first side and the second steel plate on a second side. A resistive heat therein is proportional to the graduation. A hole is provided in each plate for mounting purposes. The tool rack also includes a USB connector, where the USB connector supplies power for application of an electrical charge to each side of the resistive divider.

A device that is a handheld circular heating element for use in the construction industry is described. Specifically the device is useful for applying heat uniformly to a two-piece membrane for separation of the outer layer to allow the inner layer to be exposed. The device includes a handle, an electrical supply, an on/off switch and a heating element. The device uses electricity to heat the heat-emitting burner of the heating element, which is then placed next to the membrane. As the membrane is warmed, the two layers of the membrane are able to be separated, which exposes the inner membrane.

An electric heater includes a. substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.

An electric heater includes a substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.

A radome device for a radar sensor of a vehicle has a radome with a central region which is permeable to electromagnetic radiation from the radar sensor. The radome device includes a heating element for controlling the temperature of a central region of the radome, wherein a heat output can be introduced into the central region of the radome by way of electrical energy. The central region has a preferred accumulation region, within which precipitation from the surroundings of the vehicle preferably accumulates when the radome device is arranged on the vehicle as intended. An overall heat output that is different from the heat output can be introduced into the preferred accumulation region.

A heated scooping device provides efficient handling of dense comestibles. The device comprises a head portion having a bowl section and rim. The head portion may be affixed to a handle portion extending from the head portion. A heating means including a heating unit and heating element supplies electricity to rim portion fashioned with the heating element. Power is supplied to the heating means via a power means found in the device. A retainer positioned between the bowl section and heating element stabilizes and isolates the heating element from the bowl section. A method for manufacturing a heated scooping device includes affixing a handle portion to a head portion having a bowl section and rim, providing a heating means to heat a portion of the rim, and positioning a retainer between the bowl section and the heating element for electrically and thermally isolating the heating element from the bowl section.

The present invention provides an electric heating device and its preparation method; the said electric heating device includes at least one PTC electric heating element and radiation fin; the said PTC electric heating element includes positive and negative electrodes and PTC element between positive and negative electrodes; the said radiation fin is located at outer surface of the said PTC electric heating element; surface of the said radiation fin_with no physical connection to the said PTC electric heating element, is uncharged. State-of-the-art flat aluminum tube or aluminum tube is not used for the electric heating device provided in the present invention, which not only saves costs, but also reduces heat resistance in intermediate link of flat aluminum tube, enhances heat exchange efficiency and increases volumetric power density.