An electric heating device includes a housing encompassing a PTC element and strip conductors electrically connected to the PTC element for energizing the same with different polarity. The housing is integrally molded over the PTC element and strip conductors from a polymer ceramic. A method of manufacturing such an electric heating device also is disclosed.

A PTC heating appliance has a heating element array including a first plurality of PTC chips stacked into a second plurality of columns and including porous heat-exchanging radiators each in thermal communication with one or more of the columns and arranged such that heat produced by any of the PTC chips is conducted into the porous heat-exchanging radiator or radiators with which it is in thermal communication. A fan is arranged to force air through the porous heat exchanging radiators such that the heat therein is extracted and blown from the appliance. A control is adapted to cause selective energization of sub-groups of the PTC chips and has at least a high and a low setting. A higher number of the PTC chips are energized during the high setting than during the low setting, and each subgroup includes at least one PTC chip of each column.

A heating appliance has electrical circuitry, a controller, a heating element, a temperature sensor, and a power selection switch having a varying power setting for enabling the user to select a varying power heating mode during which the room temperature is sensed by and if below a certain desirable temperature level, the controller causes higher power heating until the room temperature reaches the certain desirable temperature level and then causes lower power heating.

A heat transfer assembly includes a sheath which in one embodiment is elliptical in cross-section and in another embodiment has a complex cross-section with flat wall sections and curved wall sections. The sheath is elastically deformable so as to accept a heat transfer element sub-assembly. Once installed, the sheath holds the sub-assembly in place by an interference fit.

A heat transfer assembly includes a sheath which in one embodiment is elliptical in cross-section and in another embodiment has a complex cross-section with flat wall sections and curved wall sections. The sheath is elastically deformable so as to accept a heat transfer element sub-assembly. Once installed, the sheath holds the sub-assembly in place by an interference fit.

A heating arrangement may include at least one PTC heating device with at least one first PTC heating element. The PTC heating device includes at least one second PTC heating element that is distinct from the first PTC heating element, wherein the first and second PTC heating elements may be arranged in a through-flow direction next to one another. Alternatively, a further PTC heating device with at least one second PTC heating element that is distinct from the first PTC heating element may be provided, wherein the first and second PTC heating devices may be arranged in the through-flow direction next to one another.

A heating assembly includes a heater extending in a longitudinal direction from a first end to a second end. Heat transfer fins are thermally coupled to the heater and extend in a direction transverse to the longitudinal direction. An airflow component is positioned proximate one of the first and second end and is configured to generate airflow along the plurality of heat transfer fins toward the other of the first and second end.

An electric heating device comprises a housing with a partition wall which separates a connection chamber from a heating chamber for dissipating heat and from which at least one PTC heating element with a heater casing protrudes in the direction toward the heating chamber. The at least one PTC element and conductor tracks are supported in the heater casing in an insulated manner. The heater casing is sealed against the partition wall by way of a seal arranged in a receptacle of the partition wall circumferentially surrounding the heater casing. A press ring is arranged in the receptacle and surrounds the heater casing circumferentially, securing the seal in the receptacle. A method of forming such an electric heating device also is disclosed.

An electric heating device comprises a housing with a partition wall which separates a connection chamber from a heating chamber for dissipating heat and from which at least one PTC heating device protrudes as a heating fin in the direction toward the heating chamber. The PTC heating device comprises at least one PTC element electrically connected to conductor tracks in the connection chamber. A temperature sensor is connected, in terms of data, to a control device and is accommodated in a sealed manner in a temperature sensor receptacle which is formed in a wall delimiting the heating chamber. The temperature sensor is accommodated in a sliding manner in the temperature sensor receptacle. A support prevents the temperature sensor from sliding out of the temperature sensor receptacle and/or directly plugs a temperature sensor contact element of the temperature sensor in the connection chamber into a printed circuit board.

A PTC heating device includes a PTC element and a frame element which forms a recess circumferentially surrounding the PTC element and being covered on both sides by electrically insulating plates that interact with the frame element for sealing the PTC element in the recess. In order to create a PTC heating device which allows for a reliable electrical connection of the PTC element to a power source while reliably sealing the PTC element in the recess, the insulating plates each be provided with a metallization that is connected, in an electrically conductively manner, to the PTC element. The metallization is connected in an electrically conductively manner, to an associated contact surface provided on the outer surface of the electrically insulating plate for the electrical connection of a power source to the PTC heating device.