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.

System and methods are provided for improving fuel economy, and providing optimized operating conditions associated with a vehicle's air-conditioning system when the vehicle is carrying a load, e.g., towing a trailer. Operating conditions including, for example, air-mix setting, coolant temperature, ambient temperature, vehicle speed, and whether or not the vehicle is carrying the aforementioned load, may be considered when determining whether or not to activate or deactivate a vehicle heating element, such as a positive temperature coefficient (PTC) heater, steering wheel heater, etc.

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.

An electric vehicle thermal management system is provided. The system includes an inside AC unit having an air inlet unit and an air outlet unit and a cooling core embedded therein. A heating core is disposed between the air outlet unit of the inside AC unit and the cooling core and a control door is disposed inside the inside AC unit to adjust air supply to the heating core. A first flow path circulates to pass through the heating core and includes an electric heater. A branch flow path is branched from downstream point of the heating core of the first flow path and passing through a high voltage battery heat exchange unit. A control valve is disposed in a branch point between the first flow path and the branch flow path and a second flow path circulates between a compressor and a condenser and the cooling core.

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.

An electric heating device, in particular for a motor vehicle, includes a housing which has an inlet and outlet opening for a medium to be heated and which encloses a layered structure. The layered stricture comprises at least one PTC element which is electrically conductively connected to conducting elements leading to connections of different polarity, and heat-emitting elements that are conductively connected on both sides to the PTC element. In order to provide improved heat dissipation, the heat-emitting elements include a panel element that is provided with perforations and that is made of a heat-conducting material.

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.

An air-conditioning device includes: a heating cycle configured to circulate the heating medium through a heater core, the heater core being configured to heat blown air; an auxiliary heating device configured to heat the heating medium by an electric heater; a refrigeration cycle configured to circulate cooling medium discharged from a compressor through a condenser, the condenser being configured to heat the heating medium; refrigeration cycle control means configured to operate the refrigeration cycle such that temperature of the heating medium reaches target heating-medium temperature; auxiliary heating device control means configured to operate the auxiliary heating device such that the temperature of the heating medium reaches the target heating-medium temperature; and switching means configured to stop the operation of the refrigeration cycle in the state in which the temperature of the heating medium is equal to or higher than the threshold value.

In an air-conditioning apparatus of a so-called heat pump system, wasteful power consumption to be generated when an auxiliary heating means is disposed on an air upstream side of a radiator is decreased, and comfortable heating of a vehicle interior is also achieved. The air-conditioning apparatus includes an electric heater 57 disposed on an upstream side of air flowing through an air flow passage 3 to a radiator 4, and a controller executes a cooperative operation of heating air to be supplied to the vehicle interior by the electric heater 57 and the radiator 4, and stops a compressor 2 on the basis of establishment of a condition that an inlet refrigerant temperature Tcxin of the radiator is lower than an outlet refrigerant temperature TCI of the radiator (Tcxin<TCI).