An optical face protection apparatus is provided having a support body, at least one lens and an elongate heating element. The support body is configured to be supported on a user. The at least one lens is carried by the support body and is configured to hold the at least one lens over an eye facial region of a user. The elongate heating element has an elongate tube and a heat source provided in the tube, carried by the body and configured to traverse an expansive surface area of the at least one lens.

A hybrid heater system for an aircraft air data sensor includes a voltage source and a first hybrid heater set. The first hybrid heater set includes a carbon nanotube (CNT) heater, a first positive temperature coefficient (PTC) heater disposed in parallel with the CNT heater to form a parallel formation, and a second PTC heater disposed in series between the voltage source and the parallel formation.

The invention relates to a heating device (1) for an air-conditioning housing, said heating device (1) comprising a heating body (2) supplied with current for heating an air flow passing through said heating body (2), said heating body (2) comprising heating elements through which said current passes and which are arranged in electrically insulated tubes (4) of the heating elements, said heating elements being controlled via a distribution unit (3), said heating device (1) comprising means for earthing a plurality of metal elements distributed in the heating body (2) and the distribution unit (3). Said heating device (1) is characterised in that said earthing means consist of a single earthing circuit which passes through the heating body (2) and the distribution unit (3) and is formed by arranging said metal elements in series with direct contact between said metal elements.

A system and method for monitoring the health of a heater connected to a power supply by a power cable that includes a first power lead conducting an inlet current having an inlet current direction, and a second power lead conducting an outlet current having an outlet current direction opposite to the inlet current direction. The power cable passes through a center region of a toroid core one or more times, and a secondary winding on the toroid core is configured to induce a secondary voltage indicative of a difference between the inlet current and the outlet current, which defines the leakage current. The system includes a prognostic processor that is configured to calculate a heater health indication based on the secondary voltage, which is indicative of the heater health.

A vehicle including a system for transferring energy between on-board vehicle components and/or between on-board and external components. The vehicle is configured to heat various components through induction to provide comfort to the rider and/or to transfer energy for charging one or more vehicle components.

A system for controlling a multi-zone resistive heater. The system includes a first zone of the multi-zone resistive heater formed from a material having a negative temperature coefficient of resistivity (TCR) and configured to receive a first power to generate thermal energy. The system further includes a second zone of the multi-zone resistive heater formed from the material having the negative TCR, separated from the first zone by a gap, and configured to receive a second power to generate the thermal energy.

Systems and devices for angle of attack sensors are provided. Aspects include a vane, a faceplate, an annular region in the faceplate, and a thin film heater assembly attached to a surface of the annual region.

The present application discloses an electric vehicle, and an electric heating device and a control system thereof. The electric heating device includes: n resistance heating units, independently electrically connected in parallel with each other; n switches, electrically connected in series with respective resistance heating units for independently controlling power-on or power-off of the respective resistance heating units; and a controller, configured to selectively turn on or turn off any at least one of the n switches according to a working condition of the electric vehicle, wherein n is a natural number equal to or greater than 2.

A method for determining the length of a heated pressure line for a conveying device for an aqueous urea solution in a motor vehicle from a tank to an injector, wherein the pressure line is electrically heatable and is heated, using ohmic resistance, by the application of a voltage to an electrical conductor led on the pressure line, wherein the length of the pressure line is calculated by the following formula:

[00001]$l_{\mathrm{pressure}\mathrm{line}}=\frac{R_{\mathrm{heating}\mathrm{conductor}}\times A}{\rho }$

where A designates the cross section of the electrical conductor and p the specific electrical resistance of the electrical conductor and R.sub.heating conductor the electrical resistance of the electrical conductor used to heat the pressure line.

A power control device of the present invention controls the electric power of a vehicle which includes hot-wire heaters provided respectively in a plurality of areas which are obtained by dividing a front window. In particular, the power control device of the present invention switches between alternating control and entire surface control based on an external air temperature of the vehicle and a speed of the vehicle, the alternating control being for sequentially energizing each hot-wire heater provided in each of the plurality of areas, and the entire surface control being for simultaneously energizing all the hot-wire heaters provided in the plurality of areas.