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.

Provided are a layered heat exchanger that can prevent deterioration of sealing property due to deformation of sealing portions of inlet and outlet header sections when a PTC heater is sandwiched between flat heat exchanger tubes, and is pressed to be brought into close contact with the flat heat exchanger tubes, and a heat medium heating apparatus and a vehicle air-conditioning apparatus using the layered heat exchanger.

A fan assembly includes a motor-driven impeller for creating an air flow, a casing including an interior passage for receiving the air flow, and a plurality of air outlets for emitting the air flow from the casing. The casing defines and extends about an opening through which air from outside the casing is drawn by the air flow emitted from the air outlets. The fan assembly also includes at least one heater for heating at least a first portion of the air flow, and means for diverting at least a second portion of the air flow away from said at least one heater. The plurality of outlets includes at least one first air outlet for emitting the relatively hot first portion of the air flow and at least one second air outlet for emitting the relatively cold second portion of the air flow.

A holding device for at least one heating element, in particular for a PTC heating element or a mica heating element, including at least two oppositely arranged holding elements, which are spaced apart from one another by a gap, which extends along a longitudinal direction of the holding device and is adapted for receiving at least one heating element, and including a heat transfer body with at least two chambers, which respectively form an inner region, through which a gaseous medium can flow, wherein the opposite holding elements are arranged between the two chambers and the gap connects the inner regions of the chambers.

A heating medium heating device (10) includes: a PTC heater (40); a first heating medium distribution box (20) tightly sealed to one surface side of the PTC heater (40) and having a first heating medium distribution path (41) formed therein; a second heating medium distribution box (50) that is tightly sealed to the other surface side of the PTC heater (40) and having a second heating medium distribution path (42) formed therein, and which is connected to the first heating medium distribution box (20); an inlet header space (44) and outlet header space (45) that respectively connect the upstream ends and downstream ends of the first and second heating medium distribution paths (41, 42); an inlet portion (47) that feeds the heating medium into the inlet header space (44); and an outlet portion (48) that discharges the heating medium from the outlet header space (45).

A heater element includes: a honeycomb structure having an outer peripheral wall and partition walls disposed on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells extending from a first end face to a second end face to form a flow path; a first electrode including an electrode portion A1 provided on the first end face, and an electrode portion B1 connected to the electrode portion A1 and provided on surfaces of the partition walls in an extending direction of the flow path from the first end face; and a second electrode including an electrode portion A2 provided on the second end face, and an electrode portion B2 connected to the electrode portion A2 and provided on surfaces of the partition walls in the extending direction of the flow path from the second end face.

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 PTC heating device has a frame surrounding an accommodation space, at least one PTC element accommodated in the accommodation space, and conductor elements, which are connected to the PTC element in an electrically conductive manner and enclose the PTC element between them. Each of the conductor elements is surrounded by a frame segment. The frame segments are welded together to enclose the PTC element in the accommodation space. In the method according to the invention, injection molded plastic frame segments having interacting connection segments are connected to conductor elements. At least one PTC element is then introduced between the frame segments. The frame segments are approached to each other until the connection segments abut against each other. The connection segments are then melted. As a result of this melting, the frame segments are approached further to each other until the conductor elements abut against the PTC element.

Flow heater comprising a housing having an inlet and an outlet, a plate shaped heating insert that is arranged in the housing and defines a flow path from the inlet to the outlet. According to this disclosure the plate shaped heating insert comprises a first heating plate, a second heating plate, and a plate support arranged between the first heating plate and the second heating plate, wherein the first heating plate and the second heating plate are arranged on opposite sides of the plate support, and the first heating plate and the second heating plate each comprise a substrate plate carrying a resistive layer.

A heating device for heating of a fluid, particularly in a vehicle or vessel, comprising at least one heating element in a housing with a house wall and a fluid inlet and a fluid outlet. The wall or a part of this or a part of the house wall is a heat conductor for conducting heat between the heating element and at least one of the fluid channels. At least one chamber is defined by the at least one wall and a portion of the housing wall, or by walls in pairs between the fluid channels. The heating element is mountable in the chamber, which has an opening towards the outside of the housing. The opening is not fluidly connected to the fluid channels. The heating element can be a PTC element.