An independently-controlled PTC (Positive Temperature Coefficient) heater includes a PTC unit including first and second PTC elements for generating heat by an applied power, a guide frame having an opening to which the first and second PTC elements are mounted, first and second electrode plates configured to respectively make surface contact with one surfaces of the first and second PTC elements which are exposed through the opening, a common electrode plate configured to make surface contact with the other surfaces of both the first and second PTC elements which is exposed through the opening, and an insulation member configured to insulate the first electrode plate, the second electrode plate and the common electrode plate from an outside; and a heat diffusion fin provided at a side of the heating tube.

A PTC heating device has contact surfaces formed by a metallization, and also has first and second contact elements which are to be assigned different polarity and which are electrically contacted with the contact surfaces. Both of the first and second contact surfaces are circumferentially sealed by a frame that follows the contour of the respective contact surface and that is made of an electrically non-conductive adhesive coating. In the method of making the PTC heating device, the contact surfaces of the PTC element are contacted in an electrically conductive manner with the two contact elements, each of which has a strand an electrically non-conductive adhesive coating following the contour of the contact surfaces. During this contacting, the adhesive coating is displaced in such a manner that both contact surfaces are circumferentially sealed by a frame formed by the adhesive coating.

A PTC heating element for an electric heater having a PTC element, an electrode formed on a surface of the PTC element for electrically contacting the PTC element, at least one additional contact for electrically connecting the electrode of the PTC element, and a carrier layer. The carrier layer is electrically insulating, the thickness of the PTC element is ?500 ?m, and the installation height of the PTC heating element is between 500 ?m and 2500 ?m. Also disclosed is an electric heater and use of the PTC heating element in a motor vehicle.

An electrical heating device may comprise a heating element and a control board. The heating element may be electroconductively connected to the control board via at least one electrical contact pin. The control board may include a contact arrangement comprising at least one contact bushing that penetrates the control board. The at least one contact pin may penetrate the control board through the at least one contact bushing (6) while being is electroconductively pressure-connected to the contact bushing. A length of the at least one contact bushing may be smaller than or equal to a thickness of the control board, and the contact bushing may be arranged completely inside the control board.

The present invention relates to an electric auxiliary heating device (1) for heating a flow of air passing through in particular a conduit of a ventilation, heating and/or air conditioning installation of a motor vehicle, the auxiliary heating device comprising a casing that houses at least one heating module, said casing comprising: a heating compartment of which a first end (61) comprises an opening (600) and a connection interface (8) comprising: .square-solid.a first plate (86) that is essentially planar and extends essentially parallel to the opening so as to cover said opening, and .square-solid.a sheath (88) that extends in projection from the first plate (86) opposite the heating compartment, .square-solid.slots (80) passing through the first plate (86) and opening inside the sheath (88), the connection interface (8) comprising, on its internal face (89) that is oriented toward the heating compartment, at least one insertion stub (85) of which at least one of the edges facing the slots (80) is chamfered.

An independently-controlled PTC (Positive Temperature Coefficient) heater includes a PTC unit including first and second PTC elements for generating heat by an applied power, a guide frame having an opening to which the first and second PTC elements are mounted, first and second electrode plates configured to respectively make surface contact with one surfaces of the first and second PTC elements which are exposed through the opening, a common electrode plate configured to make surface contact with the other surfaces of both the first and second PTC elements which is exposed through the opening, and an insulation member configured to insulate the first electrode plate, the second electrode plate and the common electrode plate from an outside; and a heat diffusion fin provided at a side of the heating tube.

A PTC heating element for an electric heater having a PTC element, an electrode formed on a surface of the PTC element for electrically contacting the PTC element, at least one additional contact for electrically connecting the electrode of the PTC element, and a carrier layer. The carrier layer is electrically insulating, the thickness of the PTC element is ?500 ?m, and the installation height of the PTC heating element is between 500 ?m and 2500 ?m. Also disclosed is an electric heater and use of the PTC heating element in a motor vehicle.

A ceramic heater having an enlarged windward area includes a conductive heat sink, at least one positive temperature coefficient (PTC) heating element, and an electrode plate. The conductive heat sink includes a cooling fin. The at least one PCT heating element is disposed on one side of the cooling fin. The electrode plate is disposed on the other side of the cooling fin. A conductive terminal protrudes from one end of the electrode plate. The conductive terminal includes a warped section and a flat section. A portion of the warped section and the flat section extend in a direction perpendicular to an extending direction of the electrode plate. Accordingly, heat dissipation is accelerated, a windward area is enlarged, and the effect of blowing out a hot airflow is enhanced, thereby avoiding a temperature rise of the conductive terminal.

An electric heating device including a heater housing in which a partition separates a circulation chamber, through which a medium to be heated can flow, from a connection chamber in which electrical connections of a PTC heating element introduced into a recess of a heating rib projecting from the partition into the circulation chamber are exposed. The PTC heating element has at least one PTC element and strip conductors lying against it at both sides, of which at least one strip conductor is covered by an electrical insulation layer. To create an electric heating device which permits a delivery of heat of the PTC heating element to the environment in an improved way, the heating rib is formed by a heating rib frame which comprises at least one window in which the insulation layer is exposed.

A heat exchanger having at least one electrical resistance heating element, two conductors connected electrically to the electrical resistance heating element to conduct electric current through the electrical resistance heating element and thereby to heat the electrical resistance heating element, a heat-conducting element for transferring heat from the electrical resistance heating element to a fluid to be heated, an electrical insulating element insulating electrically the two conductors and the at least one electrical resistance heating element, and at least one tube. The two conductors, the electrical insulating element, and the electrical resistance heating element are arranged within a cavity bounded by the tube. The heat exchanger has an adapter plate and a tube opening, each being arranged at an opening of the adapter plate, and the at least one tube being connected fluid-tight to the adapter plate, which is connected fluid-tight to an electronics housing and/or an HVAC system housing.