An optical imaging lens including an optical lens assembly with an optical axis, a lens barrel and a conductive element is disclosed. The optical lens assembly includes a plurality of lenses. The lens barrel includes an inner wall surface and a heating film, wherein the inner wall surface surrounds the optical axis and is made of electrical insulating material, and the heating film is formed on the inner wall surface. The optical lens assembly is disposed in the lens barrel in order from an object side to an image side. An edge of at least one lens of the optical lens assembly contacts the heating film. The conductive element is extended along the inner wall surface of the lens barrel, and is electrically connected to the heating film. One terminal of the conductive element is connected to an external power supply.

A device for thermally loading an enclosure and/or a heat sink includes: at least one circuit board arranged or arrangeable in the enclosure or on the heat sink, each at least one circuit board having at least one conductor track and at least two fields within each of which a continuous electrically conductive track section of the at least one conductor track runs, a path length of the at least one conductor track section within each of the at least two fields being greater than one or each edge length of a respective field or one or each diagonal of the respective field or a perimeter of the respective field. The fields include tiles of a tiling of a first side of the circuit board The conductor track sections each thermally load the enclosure and/or the heat sink depending on a current feed to the respective conductor track.

A floor mat including a mat assembly, a frame assembly, a case assembly and a vehicle assembly is disclosed. The mat assembly includes a mat mounted to a frame of the frame assembly. A user lays on the mat and underneath a vehicle of the vehicle assembly needing repairs. Mounted onto the frame are lights. The lights are positioned to illuminate the vehicle and regions needing repairs. The user can complete repairs unassisted and at night with the lights. Underneath of the frame are wheels for maneuvering and positioning of the mat and the user underneath of the vehicle. The mat includes heating members to provide heat and comfort to the user as they work in harsh weather conditions. The case assembly includes a case for storing and transporting the frame. The floor mat increases the safety, comfort and efficiency of the user when repairs are being completed.

A PTC heating element comprises at least one PTC element and two conductor paths which are assigned to different polarities and which are electrically conductively connected to the PTC element and are provided with connection elements for the electrical connection of the PTC element. The PTC heating element has improved heat discharge due to the provision of an electromagnetic shielding which is formed from a fluid-permeable metal structure and which surrounds the PTC element and the conductor paths.

A heat mat with thermostatic control having a reference voltage generating source that provide high voltage DC for a power controller and low voltage for a temperature sensor and hysteresis circuit. The sensor and hysteresis circuit establish a temperature threshold signal that is delivered to the resistance heating element. The resistance heating element is sandwiched between two layers of material with adhesive. Two layers of PVC protects the sandwich. In manufacturing the heat mat, the resistance heating element is placed with adhesive between two layers of material then cured and degassed under vacuum. The thermostatic control is sealed within an overmold housing or flat pack.

The present disclosure provides a self-regulating electric heating film, including: an insulating isolation layer, an interdigital electrode arranged on the surface of the insulating isolation layer, a positive temperature coefficient coating covering the surface of a secondary electrode of the interdigital electrode, and an insulating protective layer covering the surface of a primary electrode of the interdigital electrode, wherein the positive temperature coefficient coating is not in contact with the primary electrode of the interdigital electrode, and the insulating protective layer overlaps the positive temperature coefficient coating.

A heating device comprising a temperature measuring device has a sheet-like carrier, at least one heating conductor on said sheet-like carrier, an elongate electrode on the sheet-like carrier and a layer structure on the carrier with an insulation layer between the heating conductor and the electrode. A measuring apparatus for detecting local high temperatures at the heating device is connected to the electrode and to the heating conductor. Said measuring apparatus detects a temperature-dependent leakage current through the insulation layer between the heating conductor and the electrode and evaluates this as a measure of a local change in temperature at the heating device. The electrode consists of a material with a temperature dependence of its electrical resistance of between 0.0005/° C. and 0.01/° C. in a temperature range of between 0° C. and 200° C. A temperature measuring device is connected to the electrode for the purpose of measuring a temperature at the electrode using the temperature dependence of the electrical resistance of the electrode.

The present invention involves calibrating a control system to enable resistance-based control of a heat tracing circuit, that includes characterizing a piece of heat trace to determine a relationship between resistance and temperature, allowing for more precise control. Also described are different methods for practical resistance-based control of a heat trace system. Further described are several methods to monitor heat trace: including methods to enhance monitoring capabilities using a system operating model; comparison to historical operating data; and inclusion of information from external sources. Also provided is a method by which a piece of heat trace of unknown length and power factor can be controlled using the resistance-based method when other system information is available.

A thermoacoustic device includes a stage coupled to a bar, wherein the stage includes a first heating component on a first terminus of the stage. The stage further includes a first cooling component on a second terminus of the stage. A thermal conductivity of the stage is higher than a thermal conductivity of the bar. A heat capacity of the stage is higher than a heat capacity of the bar.

An apparatus may include an enclosure that includes a plurality of mounting features that are configured to receive information handling systems; one or more environmental sensors configured to determine environmental conditions associated with the enclosure; a position sensor configured to determine a geodetic location of the enclosure; a heater configured to heat the enclosure; and a heater control system. The heater control system may be configured to: receive information regarding an origin for the enclosure, a destination for the enclosure, and a desired destination temperature for the enclosure; establish a model for the enclosure, wherein the model incorporates data from the one or more environmental sensors and data from the position sensor; and based on the model, predictively determining control parameters for the heater configured to cause the enclosure to reach the desired destination temperature at or before a time of arrival at the destination.