A fuel injection nozzle is connected to a pump for injecting the fuel and to a fresh air supply for the internal combustion engine. In order to provide an injection device which allows temperature control of the injected media with a simple structure and arrangement in the motor vehicle, the injection device has an electric heating device for heating the fresh air supplied. The heating device is fluidically connected via a first hose section to the inlet side of the fresh air supply and via a second hose section to the internal combustion engine. The heating device has a layered heating block comprising at least one heat-emitting layer and at least one heat-generating layer coupled thereto in a heat-conducting manner The heat-generating layer includes at least one PTC element and conductor elements abutting opposed sides of the PTC element.

A control device and electric heating device having such a control device are disclosed. The control device has a control housing which surrounds a printed circuit board, which has a partition wall provided with a cooling element, and which accommodates at least one power switch that makes contact with the printed circuit board and that is applied in a heat-conducting manner against the cooling element via a hold-down device. The power switch and the hold-down device are realized in a pre-assembled module connected to the cooling 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 PTC heating element has a casing that joins as a unit at least one PTC element, conductor paths electrically connected to the PTC element, and insulating layers bearing, in a heat-conductive manner against the PTC element. The PTC heating element also has contact strips which project over itself and which are electrically conductively connected to the conductor paths for energizing the PTC element with different polarities. The casing forms a receptacle space that receives the PTC element, the conductor paths, and the insulating layers. In order to improve heat decoupling from the PTC element, the receptacle, in a cross-sectional view, is defined by two oppositely disposed inner surfaces covering the PTC element and concave cavities, adjoining the inner surfaces and forming the longitudinal edges of the casing, the diameter of which is greater than the distance between the inner surfaces. The electric heating device has at least one PTC heating element arranged in a circulation chamber. Also disclosed is a method in which the casing is first formed, the PTC element, the conductor paths and the insulating layers are then introduced through an opening of the casing into the receptacle space, and the casing then is deformed by deforming forces acting upon edge regions of the casing, so that oppositely disposed inner surfaces of the casing are abutted against the insulating layers.

The invention relates to a heating system component for a heating system for heating a fluid medium, with a carrier unit, and a heating unit coupled to said carrier unit, wherein said carrier unit comprises a wet side and a dry side, wherein said wet side corresponds to a surface of said carrier unit configured to be in contact with said fluid medium, wherein said dry side is located on a surface opposite to said wet side; and wherein said heating unit is recessed in a groove provided on said dry side of the carrier unit. A temperature sensor, in particular an NTC thermistor, positioned to measure a temperature of a fluid medium at the wet side of the carrier unit, wherein the temperature sensor is effectively thermally insulated from the heating unit.

A refiner device for refining of a liquid, wherein the refiner device includes a housing provided with a liquid inlet for unrefined oil or fuel, a liquid outlet for refined oil or fuel, an air inlet for supplying a flow of air into the housing, and an air outlet for discharging air and contaminants removed from the liquid. The refiner device further includes a liquid receiving plate arranged inside the housing, the refiner device arranged such that when liquid has passed through the liquid inlet during operation of the device, the liquid is contacted with an upper surface of the liquid receiving plate before it reaches the liquid outlet, and at least one heating element arranged to directly or indirectly heat the liquid while the liquid is in contact with the liquid receiving plate. The refiner device further includes a hollow air-guiding member arranged at the liquid receiving plate.

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.

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.

An electric heating device includes at least two hollow profile elements which form a fluid channel for a fluid to be heated and, opposite the fluid channel, a heating chamber which is bounded by opposite contact surfaces against which at least one PTC element abuts in a heat-conducting manner. A scalable and easier to assemble electric heating device is achieved by connecting the hollow profile elements to one another by complementary form-fit segments.

A water heating apparatus includes: a water container configured to heat water via a convection process by receiving the water through an inlet and passing water through an outlet; and one positive temperature coefficient (PTC) heating element or a plurality of PTC heating elements arranged within the water container and configured to be immersed during the convection process. The plurality of PTC heating elements have a gap between each PTC heating element. Further, the water heating apparatus includes at least one ultrasonic transducer attached to the water container and configured to project ultrasound onto and around the PTC heating element or the plurality PTC heating elements within the water container and to descale the PTC heating element or the plurality of PTC heating elements.