A high-voltage heater for a motor vehicle for heating a coolant is disclosed. The high-voltage heater includes at least two flat tubes that are flowable through by the coolant and at least one heating element. The at leas two flat tubes and the at least one heating element are alternatingly stacked on top of one another in a stacking direction to form a stack. The at least one heating element is connected at least to one of the adjacent flat tubes in the stack in a heat-transferring manner.

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.

The description relates to a vehicle heating system having at least one heat transfer device through which air can flow to be heated and at least one heating device which is attached to the heat transfer device and which each involves at least one heating element arranged between two contact plates, said heating element being held by a positioning frame which is attached to one of the contact plates. The contact plates of the heating devices are each held in a positioning frame to which they are attached.

The present application discloses an electric vehicle, and a heating cavity assembly of an electric heater of the electric vehicle. The heating cavity assembly includes: an electric heating unit, located in a heating cavity and configured to convert electric energy into heat energy; a flow channel structure, located in a heat exchange cavity, configured to allow a heat transfer medium passing through the flow channel structure to receive heat energy from the electric heating unit and including a plurality of medium flow channels, wherein the plurality of medium flow channels extend in parallel to each other along respective extension track lines with a translation relationship.

An electric heating device may heat an air flow through a duct of a ventilation, heating and/or air-conditioning installation of an automotive vehicle. The heating device may include at least one heating module that is contained in a heating body. The heating body may include a housing for controlling and supplying electrical power to the at least one heating module. The housing may include, in its interior, a printed circuit board from which a power supply connector and a control connector protrude. The housing may also include a power supply opening such that the power supply connector emerges from the housing and a control opening such that the control connector emerges from the housing. The housing may include a skirt that protrudes in parallel to the control connector on the periphery of the control opening. The skirt may be formed as a single part with the housing.

An electrical heating device for a motor vehicle, which includes at least one heating element and which includes at least one printed circuit board, the printed circuit board having at least one contacting area for establishing an electrical connection between the heating element and an energy source, the heating element having a plurality of PTC heating elements, which are electrically conductively connected to each other by a contact element, the contact element of the heating element being disposed at a distance from the contacting area, an electrically conductive connection between the contact element and the contacting area being established with the aid of a plurality of conductor strands.

Described herein is a composite panel that includes a first layer made from an electrically non-conductive material. The composite panel also includes a resistance heater printed onto the first layer. Further, the composite panel includes a second layer adjacent the resistance heater, the resistance heater being positioned between the first layer and the second layer. The second layer is made from an electrically non-conductive material.

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.

An electric heating device includes at least two hollow profile elements which form a fluid channel for a fluid to be heated and, opposite the fluid channel, a heating chamber which is bounded by opposite contact surfaces against which at least one PTC element abuts in a heat-conducting manner. A scalable and easier to assemble electric heating device is achieved by connecting the hollow profile elements to one another by complementary form-fit segments.

A PTC heater including: a PTC element heating part configured to generate heat; and a pair of heat dissipating plates disposed at two opposite sides of the PTC element heating part, respectively, so as to be in contact with the PTC element heating part and having a plurality of flow holes, in which the heat dissipating plates have heat dissipating fins each connected to one side of each of the flow holes and bent to a space between the heat dissipating plates.