An electric air heating device for a vehicle, specifically a motor vehicle, preferably a private car or a heavy goods vehicle, including at least a first heating element around which the air to be heated flows, wherein the first heating element comprises a preferably electrically-insulating substrate and at least one electrically-conductive carbon-based coating, specifically a polymer coating.

An electrical liquid heating device, in particular water heating device, preferably for a motor vehicle, including at least a first conductive layer, in particular a first metal layer, a second conductive layer, in particular a second metal layer, and a polymer layer which contains a polymer component and a conductive carbon component and is arranged between the first and the second conductive layer, wherein liquid channels for conducting the liquid, in particular water, being heated are provided which extend from a first side of the polymer layer facing the first conductive layer to a second side of the polymer layer facing the second conductive layer.

A method for producing an electric heating device, preferably fluid- or air-heating device, in particular for a motor vehicle, wherein at least one conductive polymer structure is produced by primary forming, said polymer structure containing a polymer component and a conductive component, in particular carbon component, wherein fluid channels for conducting the fluid to be heated are introduced into the polymer structure during the primary-forming manufacturing.

A fuel-operated vehicle heater, combustion chamber assembly unit includes a combustion chamber housing (14) having a combustion chamber bottom (18) and a combustion chamber circumferential wall (16) extending in a housing longitudinal axis (L) direction to define a combustion chamber (20). A porous evaporator medium (60) is on the combustion chamber circumferential wall or/and the combustion chamber bottom, at an inner side facing the combustion chamber. A fuel feed line (62) feeds liquid fuel into the porous evaporator medium. A first combustion air feed device (68), associated with the combustion chamber bottom, feeds primary combustion air (VP) into a first combustion zone (50) at which the porous evaporator medium is arranged. A second combustion air feed device (70), following the first combustion zone in the housing longitudinal axis direction feeds secondary combustion air (VS) into the combustion chamber at an axially spaced location from the first combustion zone.

An electric heating appliance, particularly a liquid or air heating appliance, particularly for a motor vehicle, comprising a first heating element with a corresponding main body and at least one second heating element with a corresponding main body. A clearance is formed between the heating elements through which fluid can flow for its heating. The heating elements are joined together by at least one spacer arranged between them, particularly a conductive spacer. The spacer is a fixed component of the first heating element.

A method for producing an electric heating device, preferably liquid or air heating device, in particular for a motor vehicle, wherein at least one first conductive polymer layer which contains a first polymer component and a first conductive component, in particular carbon component, is applied to an, in particular, insulating, first substrate in order to form a first heating element and is crosslinked there by means of radiation.

A combustion chamber assembly unit for a fuel-operated vehicle heater includes a combustion chamber housing (14), a combustion chamber (18) formed in the combustion chamber housing (14), an evaporator medium (28) for the absorption of liquid fuel and for the discharge of fuel vapor into the combustion chamber (18), and a heating/ignition device (36) for heating the evaporator medium (28) or/and for igniting a mixture of fuel and combustion air formed in the combustion chamber (18). The heating/ignition device (38) includes at least one radiation source (38) for the emission of electromagnetic radiation into the combustion chamber (18) and at least one absorption body (29, 46) for the absorption of electromagnetic radiation emitted into the combustion chamber (18).

A cooling water heating apparatus includes: a housing having an inlet through which cooling water flows in at a first side and an outlet through which cooling water flows out at a second side; a sheath heater housed in the housing and electrically connected to an outside through an electric circuit to heat the cooling water in the housing; and an overheat preventing device housed in the housing to be submerged under the cooling water in an upper side of the housing in a gravity direction, the overheat preventing device having a positive temperature coefficient (PTC) device connected in series to the electric circuit of the sheath heater to allow the PTC device to control energization of the sheath heater.

An electric heating apparatus, in particular a liquid or air heating apparatus, in particular for a motor vehicle, including a first heating element and at least one second heating element. The heating elements comprise in each case one, in particular insulating, substrate and one polymer layer which contains a polymer component and a conductive component, in particular a carbon component. An intermediate space through which the fluid is capable of passing for heating said fluid is configured between the heating elements. The heating elements are connected to one another by one or a plurality of, in particular conductive, spacer(s) disposed therebetween, and/or one or more, in particular conductive, positioning element(s) that penetrate (a) respective clearance(s) and/or openings of the heating elements.

A method for producing an electrical fluid heater, in particular an air heater for a motor vehicle, including at least one fluid guiding channel for the fluid to be guided through, wherein at least one conductive polymer structure containing a polymer component and a conductive component, in particular carbon component, is coated, in particular cohesively, with at least one metallic layer.