A heat exchanger for heating a fluid that exhibits simplified manufacturing, a reduced construction size, and/or an increased heating efficiency. The heat exchanger has at least two distanced tube bodies through which a flow path of the fluid leads. A thin-film resistor is applied on the outer surface of at least one of the tube bodies with an interface made of a thermal interface material located between the thick-film resistor and the next neighboring tube body.

A heating apparatus, in particular for recreational vehicles like campers or caravans, comprises a heating unit and two separate heat exchanging units, which are coupled to the heating unit in parallel with each other. The heating unit comprises one burner for each heat exchanging unit, and at least one combustion air fan unit configured to supply the burners with combustion air. The burners are configured to burn fuel gas or liquid further supplied to each of the burners together with the combustion air received from the combustion air fan unit to get hot exhaust gasses. The heat exchanging units and are configured to receive the exhaust gasses from the burners, and to transfer heat from the exhaust gasses to fluids to be heated, provided within the heat exchanging units. The heat exchanging units are positioned in parallel with each other side by side on one side of the heating unit. Furthermore, the present invention refers to a recreational vehicle with such a heating apparatus.

A high-voltage heater for a motor vehicle for heating a coolant is disclosed. The high-voltage heater includes at least two flat tubes that are flowable through by the coolant and at least one heating element. The at leas two flat tubes and the at least one heating element are alternatingly stacked on top of one another in a stacking direction to form a stack. The at least one heating element is connected at least to one of the adjacent flat tubes in the stack in a heat-transferring manner.

The description relates to a vehicle heating system having at least one heat transfer device through which air can flow to be heated and at least one heating device which is attached to the heat transfer device and which each involves at least one heating element arranged between two contact plates, said heating element being held by a positioning frame which is attached to one of the contact plates. The contact plates of the heating devices are each held in a positioning frame to which they are attached.

The present invention relates to a heating device (10), in particular to an electric heating device for a motor vehicle, having a heat exchanger housing (12), heat exchanger core (14) which absorbs heat at a heat input face, and a printed circuit board (20) having electronic components (16, 18) for controlling the heating device (10), wherein the printed circuit board (20) is arranged on an outer side (22) of the heat exchanger housing (12), wherein a temperature sensor (24) is arranged on a side (26) of the printed circuit board (20) which faces the outer side (22) of the heat exchanger housing (12), wherein connecting means (28) are provided which connect the temperature sensor (24) in a heat conducting fashion to the outer side (22) of the heat exchanger housing (12), and wherein the heat input face of the heat exchanger core (14) is connected in a heat-conducting fashion to the heat exchanger housing (12), with the result that a continuous short heat bridge, running through the interior of the heat exchanger housing (12), to the connecting means (28) is generated.

An electric heating device may heat an air flow through a duct of a ventilation, heating and/or air-conditioning installation of an automotive vehicle. The heating device may include at least one heating module that is contained in a heating body. The heating body may include a housing for controlling and supplying electrical power to the at least one heating module. The housing may include, in its interior, a printed circuit board from which a power supply connector and a control connector protrude. The housing may also include a power supply opening such that the power supply connector emerges from the housing and a control opening such that the control connector emerges from the housing. The housing may include a skirt that protrudes in parallel to the control connector on the periphery of the control opening. The skirt may be formed as a single part with the housing.

An electrical heating device for a motor vehicle, which includes at least one heating element and which includes at least one printed circuit board, the printed circuit board having at least one contacting area for establishing an electrical connection between the heating element and an energy source, the heating element having a plurality of PTC heating elements, which are electrically conductively connected to each other by a contact element, the contact element of the heating element being disposed at a distance from the contacting area, an electrically conductive connection between the contact element and the contacting area being established with the aid of a plurality of conductor strands.

A radiant panel (1) intended to be installed inside a vehicle (80) passenger compartment (3), in particular a motor vehicle passenger compartment, the radiant panel (1) comprising at least one array of electrodes with at least two primary electrodes of different polarities, the array of electrodes being arranged such that at least two primary electrodes of different polarities each define at least one spiral winding around one another.

An electric power converter device may include first and second housings separated by a fluid-impermeable plate, at least one power electronics unit electrically connected to an electric power input and output, at least one fluid chamber fluidically connected to a fluid inlet and outlet, and at least one heater electrically connected to the electric power input and output, the fluid chamber and heater thermally coupled such that waste heat generated by the power electronics unit may be used to heat a fluid flowing through the fluid chamber. The electric power converter device may have first and second operation modes, the waste heat being increased in the second operation mode. The first housing and the plate may form a first space area in which the power electronics unit and the heater may be arranged, and the plate and the second chamber form the fluid chamber with a second space area. The power electronics unit may form a DC-to-DC converter which converts a high voltage of 400 V to a low voltage of 12 V, wherein a heating power in the range of 3 kW to 4 kW.

Electric fluid heater for a vehicle, including a heating block with an inlet and an outlet for the fluid, a first channel for the fluid intended to flow between the inlet and the outlet, a first tube and a second tube with opposing ends mounted in headers, the tubes having heating elements. The first channel is delimited by a top plate and a bottom plate sealingly connected to the first tube, the second tube and the headers.