HEATING DEVICE

Abstract

An electrical heating device may comprise a heating element and a control board. The heating element may be electroconductively connected to the control board via at least one electrical contact pin. The control board may include a contact arrangement comprising at least one contact bushing that penetrates the control board. The at least one contact pin may penetrate the control board through the at least one contact bushing (6) while being is electroconductively pressure-connected to the contact bushing. A length of the at least one contact bushing may be smaller than or equal to a thickness of the control board, and the contact bushing may be arranged completely inside the control board.

Claims

1. An electrical heating device comprising: a heating element; and a control board, wherein the heating element is electroconductively connected to the control board via at least one electrical contact pin, wherein the control board has a contact arrangement comprising at least one contact bushing, which penetrates the control board, wherein the at least one contact pin penetrates the control board through the at least one contact bushing and is electroconductively pressure-connected to the contact bushing, wherein a length of the at least one contact bushing is smaller than or equal to a thickness of the control board, and the contact bushing is arranged inside the control board.

2. The heating device according to claim 1, wherein the at least one contact bushing has a radial collar on first and second sides, and the radial collar is flush with a board surface of the control board.

3. The heating device according to claim 1, wherein at least one of: the at least one contact bushing of the contact arrangement and the at least one contact pin of the heating element are formed of metal including aluminum.

4. The heating device according to claim 1, wherein the at least one contact pin has at least one radially protruding press protrusion, and the at least one press protrusion deforms elastically at least area by area in the at least one contact bushing and mounts the contact pin in the contact bushing by means of a radial pressing force.

5. The heating device according to claim 1, wherein the at least one contact pin has a hollow space, which is radially encompassed by a pressing wall, and the pressing wall deforms elastically at least area by area in the contact bushing and mounts the at least one contact pin in the contact bushing by means of a radially acting pressing force.

6. The heating device according to claim 4, wherein the least one contact bushing has at least one fitting molding, which is directed radially to the outside and in which at least one contact pin comprising at least one of the press protrusion and the pressing wall, is mounted in a positive manner at least area by area.

7. The heating device according to claim 1, wherein the contact arrangement has a plurality of conductor tracks, which are electroconductively connected to the at least one contact bushing and by which the at least one contact bushing is configured to be electroconductively connected to control elements of the control board.

8. The heating device according to claim 7, wherein at least one of: the conductor tracks of the contact arrangement are integrated into the control board and are enclosed by the latter at least area by area, and that the conductor tracks of the contact arrangement are mounted to the control board.

9. The heating device according to claim 7, wherein the plurality of conductor tracks of the contact arrangement are formed of metal including aluminum.

10. The heating device according to claim 9, wherein the heating element is a PTC resistor heating element, which is configured to be operated at a voltage of equal to 400 V or 800 V.

11. A method of an electrical heating device, comprising: providing a heating element, a control board, at least one electrical contact pin, and at least one contact bushing in the control board; electroconductively connecting the heating element to the control board via the at least one electrical contact pin; and penetrating the control board by a contact arrangement with at least one contact bushing while being electroconductively pressure-connected to the contact bushing that is arranged in the control board.

12. The method of claim 11, wherein the providing includes the at least one contact bushing having a radial collar on first and second sides, and the radial collar being flush with a board surface of the control board.

13. The method of claim 11, wherein the providing includes at least one of: the at least one contact bushing of the contact arrangement and the at least one contact pin of the heating element being formed of metal including aluminum.

14. The method of claim 11, wherein the providing includes the at least one contact pin having at least one radially protruding press protrusion, and the at least one press protrusion deforming elastically at least area by area in the at least one contact bushing and mounting the contact pin in the contact bushing by a radial pressing force.

15. The method of claim 11, wherein the providing includes the at least one contact pin having a hollow space that is radially encompassed by a pressing wall that deforms elastically at least area by area in the contact bushing and mounts the at least one contact pin in the contact bushing by a radially acting pressing force.

16. The method of claim 14, wherein the providing includes the least one contact bushing having at least one fitting molding that is directed radially to the outside, and the at least one contact pin comprising at least one of the press protrusion and the pressing wall mounted in a positive manner at least area by area.

17. The method of claim 1, wherein the providing includes the contact arrangement having a plurality of conductor tracks, which are electroconductively connected to the at least one contact bushing and by which the at least one contact bushing is electroconductively connected to control elements of the control board.

18. The method of claim 17, wherein the providing includes at least one of: the conductor tracks of the contact arrangement being integrated into the control board and are enclosed by the latter at least area by area, and the conductor tracks of the contact arrangement being mounted to the control board.

19. The method of claim 17, wherein the providing includes the plurality of conductor tracks of the contact arrangement being formed of metal including aluminum.

20. The method of claim 19, wherein the providing includes the heating element including a PTC resistor heating element that is configured to be operated at a voltage of equal to 400 V or 800 V.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In each case schematically,

[0020] FIG. 1 shows a sectional view of a contact pin and of a contact bushing in an electrical heating device according to the invention;

[0021] FIG. 2 shows a view of a control board comprising contact pins penetrating it in an electrical heating device according to the invention;

[0022] FIG. 3 shows a sectional view of a contact pin and of a contact bushing in an electrical heating device according to the invention;

[0023] FIG. 4 shows a view of a plurality of contact pins in an electrical heating device according to the invention.

DETAILED DESCRIPTION

[0024] FIG. 1 shows a sectional view of an electrical heating device 1 according to the invention. The heating device 1 has a heating element 2only suggested hereand a control board 3. The heating element 2 is electroconductively connected to the control board 3 via at least one electrical contact pin 4. For this purpose, the control board 3 has a contact arrangement 5 comprising at least one contact bushing 6, which penetrates the control board 3. According to the invention, a length L.sub.B of the at least one contact bushing 6 is smaller than or equal toin this exemplary embodiment equal toa thickness D.sub.P of the control board 3 and the at least one contact bushing 6 is arranged completely inside the control board 3. The required space for the contact arrangement 5 on the control board 3 and the dimensions of the control board 3 can thus be reduced in an advantageous manner and the heating device 1 as a whole can be constructed more compactly.

[0025] The at least one contact pin 4 penetrates the control board 3 through the at least one contact bushing 6 and is pressure-connected in an electroconductive manner by means of the at least one contact bushing 6. The heating element 2 is thus also electrically connected to the control board 3 and can be controlled by the latter. The heating element 2 can for example be a PTC resistor heating element 7, which can be operated at a voltage of equal to 400 V or 800 V. In response to a high voltage of equal to 400 V or 800 V, the PTC resistor heating element 7 regulates down to a low current, so that the transition resistance between the contact bushing 6 and the contact pin 4, which is pressure-connected therewith, remains low.

[0026] The at least one contact bushing 6 in each case has a radial collar 8 on both sides. The respective radial collar 8 is thereby arranged so as to be flush with a board surface 9 of the control board 3. The respective radial collars 8 support the at least one contact bushing 6 in the control board 3 on both sides, so that, when repeatedly establishing or when repeatedly releasing the electroconductive contact between the at least one contact pin 4 and the at least one contact bushing 6, the latter remains securely mounted in the control board 3. The required space for the at least one contact bushing 6 and for the contact arrangement 5 as a whole is reduced.

[0027] The contact arrangement 5 has a plurality of conductor tracks 10, which are electroconductively connected to the at least one contact bushing 6. The at least one contact bushing 6 can be electroconductively connected to control elementsnot shown hereof the control board 3 by means of the conductor tracks 10. In this exemplary embodiment, the conductor tracks 10 are embodied integrally on the at least one contact bushing and are integrated into the control board 3 and are enclosed by the latter at least area by area. The required space on the control board 3 is thus additionally reduced. The at least one contact bushing 6 and the conductor tracks 10 of the contact arrangement 3 as well as the at least one contact pin 4 of the heating element 2 are formed of metal, preferably of aluminum.

[0028] To mount the at least one contact pin 4 in the at least one contact bushing 6 in a pressure-connected manner, the at least one contact pin 4 has a hollow space 12, which is radially compassed by a pressing wall 11, in this exemplary embodiment. The pressing wall 11 deforms elastically at least area by area in the at least one contact bushing 6 and thus mounts the at least one contact pin 4 in the at least one contact bushing 6 by means of a radially acting pressing force. The at least one contact pin 4 has a diameter, which increases to a constant value towards the heating element 2. The radially acting pressing force between the at least one contact pin 4 and the at least one contact bushing 6 in response to establishing the electroconductive contact between the at least one contact pin 4 and the at least one contact bushing 6 can thus increase steadily and the electroconductive contact can be established and released more easily.

[0029] FIG. 2 shows a view of the control board 3 comprising the contact arrangement 5. In this exemplary embodiment, the contact arrangement 5 has three contact bushings 6, which are arranged next to one another on the control board 3. Three contact pins 4 of the heating element 2 are mounted in the contact bushings 6 of the contact arrangement 5. The contact pins 4 thereby penetrate the control board 3 through the contact bushings 6 and are pressure-connected with the contact bushings 6.

[0030] FIG. 3 shows a sectional view of the electrical heating device 1 according to the invention. In this exemplary embodiment, the at least one contact pin 4 has a radially protruding press protrusion 13. The press protrusion 13 deforms elastically at least area by area in the at least one contact bushing 4 and thus mounts the at least one contact pin 4 in the at least one contact bushing 6 by means of a radially acting pressing force. The press protrusion 13 extends axially on the at least one contact pin 4 across a length L.sub.V, which is longer than the length B.sub.L of the at least one contact bushing 6 and the thickness D.sub.P of the control board 3. The press protrusion 13 further has a ramp area 14, which increases steadily axially from zero to a height H.sub.V of the press protrusion 13. The radially acting pressing force in response to establishing the electroconductive contact between the at least one contact pin 4 and the at least one contact bushing 6 can thus increase steadily and the electroconductive contact can be established and released more easily. Moreover, the construction of the heating device 1 shown herein corresponds to the heating device 1 shown in FIG. 1.

[0031] FIG. 4 shows a partial view of the heating element 2. Here, the heating element 2 has three contact pins 4, which can be mounted in the control board 3 by means of the contact arrangement 4, as is shown in FIG. 2.

[0032] In summary, the required space for establishing the electroconductive contact between the contact pin 4 and the contact bushing 6 on the control board 3 and also in the heating device 1 can be reduced in the heating device 1 according to the invention. The heating device 1 according to the invention can thus in particular be constructed more compactly.