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Electric heating device

專利號(hào)
US10098183B2
公開日期
2018-10-09
申請(qǐng)人
Eberspacher catem GmbH & Co. KG（DE Herxheim）
發(fā)明人
Franz Bohlender; Patrick Kachelhoffer; Michael Niederer; Andreas Schwarzer; Kurt Walz
IPC分類
H05B3/08; H05B3/18; B60H1/22; F24H1/00; F24H1/12; F24H9/18; H05B3/06; H05B3/04; H05B3/50; F24H3/04
技術(shù)領(lǐng)域
heating,rib,ptc,insulation,frame,ftc,element,chamber,partition,in
地域： Herxheim

摘要

An electric heating device including a heater housing in which a partition separates a circulation chamber, through which a medium to be heated can flow, from a connection chamber in which electrical connections of a PTC heating element introduced into a recess of a heating rib projecting from the partition into the circulation chamber are exposed. The PTC heating element has at least one PTC element and strip conductors lying against it at both sides, of which at least one strip conductor is covered by an electrical insulation layer. To create an electric heating device which permits a delivery of heat of the PTC heating element to the environment in an improved way, the heating rib is formed by a heating rib frame which comprises at least one window in which the insulation layer is exposed.

說明書

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BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention refers to an electric heating device comprising a heater housing in which a partition separates a circulation chamber, through which a medium to be heated can flow, from a connection chamber in which electrical connections of a PTC heating element introduced into a recess of a heating rib projecting from the partition into the circulation chamber are exposed, wherein the PTC heating element has at least one PTC element and strip conductors lying against it at both sides, of which at least one strip conductor is covered with an electrical insulation layer.

Such an electric heating device is e.g. known from EP 1 921 896 A1.

2. Description of the Related Art

Electric heating devices of the above-mentioned type are above all used in automotive vehicles. This includes the possibility of installing an electric heating device of such a type in an electrically driven automotive vehicle. Such automotive vehicles have an electrical system voltage different from that of automotive vehicles driven by internal combustion engines, for which an internal power supply of 12 V is enough.

Thus, there is an increasing demand for offering electric heating devices used for automotive vehicles, which are configured to be electrically insulating particularly with respect to the environment. Due to the self-regulating properties of the PTC elements this demand is diametrically opposed to the requirement to allow the PTC element to be impinged as freely as possible by the medium to be heated so as to dissipate as best as possible the heat generated by the PTC element and thus to exploit as best as possible the performance of the PTC element.

權(quán)利要求

1
What is claimed is:1. An electric heating device, comprising:a heater housing in which a partition separates a circulation chamber, through which a medium to be heated can flow, from a connection chamber in which electrical connections of a PTC heating element are exposed,wherein the PTC heating element has at least one PTC element and strip conductors lying against opposed sides of the PTC element,wherein at least one of the strip conductors is covered by an electrical insulation layer, wherein the PTC heating element is introduced into a recess which is provided in a heating rib projecting from the partition into the circulation chamber, wherein the heating rib comprises a heating rib frame with at least one window in which the insulation layer is exposed to said medium, and wherein the heating rib frame of the heating rib is connected to the partition.2. The electric heating device according to claim 1, wherein the electrical insulation layer sealingly abuts an inner side of the heating rib frame.3. The electric heating device according to claim 1, wherein the electrical insulation layer is glued into the heating rib frame.4. The electric heating device according to claim 1, wherein the heating rib frame forms two opposite windows in which one of the electrical insulation layers is respectively exposed, and wherein each strip conductor is respectively covered by an electrical insulation layer.5. The electric heating device according to claim 1, wherein the heating rib frame comprises frame legs extending in parallel with the electrical insulation layer, against which the insulation layer lies circumferentially, and wherein a mass, by which the electrical insulation layer is sealed into the heating rib frame, is provided between the PTC heating element and inner walls of the recess.6. The electric heating device according to claim 5, wherein a free space, which is provided between the insulation layers on the one hand and the PTC element and a front face of the heating rib frame provided opposite thereto on the other hand, is filled with the mass.7. The electric heating device according to claim 5, wherein an upper free space, which is provided between the PTC element and the partition, is filled with the mass.8. The electric heating device according to claim 5, wherein the mass surrounds the PTC element circumferentially.9. The electric heating device according to claim 5, wherein the strip conductor is provided at a distance from the heating rib frame and is received on a front side in the mass.10. The electric heating device according to claim 1, wherein the recess is U-shaped and opens for insertion of the PTC heating element towards the connection chamber, and wherein the circulation chamber is fitted to receive a liquid medium is sealed, and is provided with an inlet and an outlet nozzle for connection of the circulation chamber to a circuit for the liquid medium.11. The electric heating device according to claim 10, wherein the heating rib is exposed over an entire circumference thereof in the circulation chamber.12. The electric heating device according to claim 10, wherein the partition with the heating rib frame is made from a highly heat-resistance plastic.13. The electric heating device according to claim 1, wherein the recess is U-shaped and opens for insertion of the PTC heating element towards the connection chamber, and wherein the circulation chamber is fitted to receive a liquid medium is sealed, and is provided with an inlet and an outlet nozzle for connection of the circulation chamber to a circuit for the liquid medium, wherein the heating rib is exposed over an entire circumference thereof in the circulation chamber.14. The electric heating device according to claim 13, wherein the partition with the heating rib frame is made from a highly heat-resistance plastic.15. An electric heating device, comprising:a heater housing in which a partition separates a circulation chamber,through which a medium to be heated can flow,from a connection chamber in which electrical connections of a PTC heating element are exposed,wherein the PTC heating element has at least one PTC element and strip conductors lying against opposed sides of the PTC element,wherein at least one of the strip conductors is covered by an electrical insulation layer, wherein the PTC heating element is introduced into a recess which is provided in a heating rib projecting from the partition into the circulation chamber, wherein the heating rib comprises a heating rib frame with at least one window in which the insulation layer is exposed to said medium, wherein the heating rib frame of the heating rib is connected to the partition,wherein the heating rib frame forms two opposite windows in which one of the electrical insulation layers is respectively exposed, and wherein each strip conductor is respectively covered by an electrical insulation layer.16. The electric heating device according to claim 15, wherein the recess is U-shaped and opens for insertion of the PTC heating element towards the connection chamber, and wherein the circulation chamber is fitted to receive a liquid medium is sealed, and is provided with an inlet and an outlet nozzle for connection of the circulation chamber to a circuit for the liquid medium.17. The electric heating device according to claim 16, wherein the heating rib is exposed over an entire circumference thereof in the circulation chamber and wherein the partition with the heating rib frame is made from a highly heat-resistance plastic.18. An electric heating device, comprising:a heater housing in which a partition separates a circulation chamber, through which a medium to be heated can flow, from a connection chamber in which electrical connections of a PTC heating element are exposed,wherein the PTC heating element has at least one PTC element and strip conductors lying against opposed sides of the PTC element,wherein at least one of the strip conductors is covered by an electrical insulation layer, wherein the PTC heating element is introduced into a recess which is provided in a heating rib projecting from the partition into the circulation chamber, wherein the heating rib comprises a heating rib frame with at least one window in which the insulation layer is exposed to said medium, wherein the heating rib frame of the heating rib is connected to the partition,wherein the heating rib frame comprises frame legs extending in parallel with the electrical insulation layer, against which the insulation layer lies circumferentially, and wherein a mass, by which the electrical insulation layer is sealed into the heating rib frame, is provided between the PTC heating element and inner walls of the recess.19. The electric heating device according to claim 18, wherein the mass surrounds the PTC element circumferentially.20. The electric heating device according to claim 18, wherein the strip conductor is provided at a distance from the heating rib frame and is received on a front side in the mass.
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