HEATING SYSTEM, AND VEHICLE SEAT COMPRISING A HEATING SYSTEM

Abstract

A heating device that includes at least one heating element, at least one electrode element, and a substrate on which the at least one electrode element and the at least one heating element are arranged. The at least one electrode element is arranged in a path and the at least one heating element is arranged in another path that is different than the path of the at least one electrode element. The path of the at least one electrode element intersects the path of the at least one heating element in at least one contact zone. The at least one electrode element and the at least one heating element in the at least one contact zone are electrically conductively connected to one another.

Claims

1. A heating device, comprising: at least one heating element, at least one electrode element, a substrate on which the at least one electrode element and the at least one heating element are arranged, wherein the at least one electrode element is arranged on the substrate in a first path and the at least one heating element is arranged on the substrate in a second path that is different than the first path, wherein the first path of the at least one electrode element intersects the second path of the at least one heating element in at least one contact zone, wherein the at least one electrode element and the at least one heating element in the at least one contact zone are electrically conductively connected to one another at a common contact surface, and wherein the at least one electrode element and the at least one heating element intersect at least twice to achieve contact between the at least one electrode element and the at least one heating element at multiple points in the at least one contact zone and to increase the contact that is common to both of the at least one electrode element and the at least one heating element.

2. The heating device according to claim 1, wherein the heating device comprises at least one of the following features: the at least one heating element is a flat structure, the substrate is at least partially made of textile, fleece, foam, and/or film.

3. The heating device according to claim 1, wherein the heating device comprises at least one of the following features: the at least one heating element is formed by an at least partially electrically conductive strand, the at least one electrode element is formed by an at least partially electrically conductive strand.

4. The heating device according to claim 1, wherein the heating device comprises at least one of the following features: the at least one heating element has a plurality of electrically conductive filaments arranged parallel to one another, twisted with one another and/or one after the other, the at least one electrode element has a plurality of electrically conductive filaments arranged parallel to one another, twisted with one another and/or one after the other.

5. The heating device according to claim 1, wherein: the heating device has two electrodes, which are spaced apart from one another on the substrate, which span a heating zone between them, and which are electrically connected to one another via a plurality of heating elements, wherein the at least one electrode is formed from a single electrode element.

6. The heating device according to claim 1, wherein the heating device comprises a plurality of contact zones between the at least one electrode element or an electrode on the one hand and a plurality of heating elements along the at least one electrode element on the other hand.

7. The heating device according to claim 1, wherein the at least one heating element has only two contact zones, in a region of its respective ends.

8. The heating device according to claim 1, wherein the at least one electrode element runs in a meandering shape in the at least one contact region along a longitudinal direction of the at least one heating element.

9. The heating device according to claim 1, wherein the heating device comprises exactly two electrode elements are attached to the substrate and which comprises a plurality of heating elements that are carbon fiber heating resistors, wherein the exactly two electrode elements that are attached to the substrate are electrically conductively connected to the plurality of heating elements over a respective contact region.

10. The heating device according to claim 1, wherein the at least one electrode element runs at least approximately straight or at least approximately in a sinusoidal shape in a section adjoining the at least one contact region.

11. The heating device according to claim 1, wherein the at least one electrode element is attached to the substrate in the at least one contact region.

12. The heating device according to claim 1, wherein the at least one electrode element is sewn onto the substrate in the at least one contact region.

13. The heating device according to claim 1, wherein the at least one electrode element consists of copper or an alloy.

14. The heating device according to claim 1, wherein the at least one electrode element is formed by a plurality of filaments which each consist of a copper alloy, wherein the at least one electrode element has a number n of filaments, for which number n applies: 5≤n≤125, and/or each of these filaments has a cross-sectional diameter d, for which the following applies: 0.03 mm≤d≤0.12 mm

15. The heating device according to claim 1, wherein the heating device comprises a power source and/or a transformer, which are connected to at least two electrodes, attached to the substrate and which provide a nominal voltage of 48 volts.

16. A vehicle seat, comprising a seat cushion, a backrest, and the heating device according to claim 15, wherein the substrate, the at least two electrode elements, and the at least one heating resistor comprise carbon fiber components embedded in the seat cushion and/or in the backrest.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0050] In the following, the invention and its advantages are to be explained in more detail with reference to the accompanying figures.

[0051] FIG. 1 shows a schematic view of an embodiment of a heating device according to the invention;

[0052] FIG. 2 shows a schematic view of an embodiment of a vehicle seat according to the invention;

[0053] FIG. 3 shows a schematic view of electrodes as they can be provided as part of various embodiments of a heating device according to the invention or a vehicle seat according to the invention.

[0054] The illustrated embodiments merely represent examples of how the invention can be configured and do not represent a final limitation.

[0055] The embodiments, examples and variants of the preceding paragraphs, the claims or the following description and the figures can be used independently of one another or in any combination. Features that are described in connection with an embodiment are applicable to all embodiments, provided that the features are not incompatible.

DETAILED DESCRIPTION

[0056] FIG. 1 shows a schematic view of an embodiment of a heating device 1 according to the invention. The heating device 1 is provided for temperature control or heating of a vehicle seat 10, as can be seen by way of example in FIG. 2. For this purpose, the heating device 1 comprises a substrate 2, which can be, for example, a textile construction and particularly a fleece. Two electrodes 4a and 4b fastened to the substrate 2 or sewn onto the substrate 2 are further shown. The electrode elements 4a and 4b are connected to an vehicle power supply which provides a nominal voltage of 48 volts.

[0057] The useful thermal energy of the heating device 1 is provided by a plurality of carbon fiber heating resistors 6a, 6b and 6c. The carbon fiber heating resistors 6a, 6b and 6c are each routed at an angle to the electrode elements 4a and 4b, wherein each heating element 6a, 6b, 6b meets the two electrode elements 4a and 4b in a respective contact region 5a and 5b. The carbon fiber heating resistors 6a, 6b and 6c are therefore electrically conductively connected to the two electrode elements 4a and 4b over a respective contact region 5a and 5b, respectively.

[0058] If voltage is applied to the two electrode elements 4a and 4b, the carbon fiber heating resistors 6a, 6b and 6c each emit useful thermal energy, whereby a vehicle seat 10 (see FIG. 2) can be heated. Depending on the heating power respectively required, the number and/or the routing of the carbon fiber heating resistors 6a, 6b or 6c can differ from the embodiment according to FIG. 1, so that the course and the number according to FIG. 1 are only to be understood as examples.

[0059] In heating devices known from the prior art, which provide useful thermal energy via carbon fiber heating resistors, a plurality of electrode elements are routed in order to be able to ensure reliable contact or a safe electrical connection between the carbon fiber heating resistors and the electrode element. The plurality of electrode elements required to date to ensure the electrical connection is associated with a high cost of materials. Such heating devices also have high costs due to the plurality of electrode elements required. In heating devices known from the prior art, each electrode element of the plurality of electrode elements must be connected to a substrate, so that undesirably high work effort is associated with the manufacture or production of a heating device known from the prior art.

[0060] These disadvantages mentioned do not exist or only exist to a reduced extent in the heating device 1 from the embodiment according to FIG. 1. The heating device 1 has exactly two electrodes, or exactly two electrode elements 4a and 4b. The majority of the carbon fiber heating resistors 6a, 6b and 6c provided for the output of useful thermal energy run between the exactly two electrode elements 4a and 4b. As already mentioned above, each heating element 6a, 6b and 6b of the heating device 1 is electrically connected to the exactly two electrode elements 4a and 4b over contact regions 5a and 5b. FIG. 1 shows that the electrode elements 4a and 4b have a defined course in their respective contact region 5a and 5b, in which defined course the respective electrode 4a and 4b increases in area along a longitudinal direction of the respective heating element 6a, 6b and 6c. This enlargement of the area of the respective electrode 4a and 4b in the respective contact region 5a or 5b can keep very low the risk of an undesired loosening of an electrical connection between the respective electrode 4a and 4b and the respective heating element 6a, 6b or 6c in the respective contact region 5a or 5b. To increase the surface area in the longitudinal direction of the respective heating element 6a, 6b and 6c, in the embodiment according to FIG. 1, the two electrode elements 4a and 4b run in the respective contact region 5a and 5b in each case in a meandering shape along the longitudinal direction of the respective heating element 6a, 6b and 6c. To increase the surface area of the respective electrodes 4a and 4b, the electrode elements 4a and 4b in the respective contact region 5a and 5b can also have a course which differs from the meandering course according to FIG. 1. Purely by way of example, but not conclusively, reference should be made to the embodiment according to FIG. 3, wherein it is possible for an electrode 4a or 4b according to FIG. 3 to be provided as part of a heating device according to FIG. 1.

[0061] The electrode elements 4a and 4b run in a sinusoidally shape in FIG. 1 in all further regions which adjoin the respective contact region 5a and 5b. In further embodiments, it can alternatively be provided that the electrode elements 4a and 4b run in a straight line or at least approximately in a straight line in all further sections which adjoin the respective contact region 5a and 5b.

[0062] In practice, vehicle seats can form different heating zones which are predetermined for temperature control by means of a heating device. The electrode elements 4a and 4b can extend along a respective heating zone or be routed along a respective heating zone so that the respective heating zone can be correspondingly temperature controlled by means of a heating device 1. The shape or the course of the electrode elements 4a and 4b can therefore differ from a sinusoidal course according to FIG. 1 and from a straight course, so that further routing can be considered in order to be able to arrange a plurality of carbon fiber heating resistors 6a, 6b or 6c in the region of the respective heating zone. Since the electrodes or electrode elements 4a and 4b are flexible, their course or routing can be easily and simply adapted to the position of the respective heating zone. The electrode elements 4a and 4b can also have different orientations or courses in order to be able to connect the carbon fiber heating resistors 6a, 6b and 6c to the two electrode elements 4a and 4b.

[0063] In order to increase the stability of the heating device 1, the electrode elements 4a and 4b in the embodiment according to FIG. 1 are fixed or sewn onto the substrate 2 over the contact regions 5a and 5b.

[0064] FIG. 2 shows a schematic view of an embodiment of a vehicle seat 10 according to the invention. The vehicle seat 10 can, for example, be fastened in a passenger vehicle or be provided for installation in a passenger vehicle.

[0065] The vehicle seat 10 comprises a seat cushion 12 comprising a seat surface 13, a backrest 14 and a neck support 16. In the region of the seat surface 13, a heating device 1 is embedded in the seat cushion 12, so that the seat surface 13 can be heated via the heating device 1 embedded in the seat cushion 12. The heating device 1 is only indicated schematically in FIG. 2 and can be designed, for example, in accordance with the embodiment according to FIG. 1. The seat cushion 12 can comprise one or more optionally foamed layers (not shown), wherein the heating device 1 is connected to a layer and/or received or inserted therein in a receptacle which is formed by one of the a plurality of optionally foamed layers. The vehicle seat 10 can also comprise a cover which extends over the seat cushion 12, the backrest 14 and optionally also the neck support 16. FIG. 3 shows a schematic view of electrode elements 4a and 4b as they can be provided as part of various embodiments of a heating device 1 according to the invention (see FIG. 1) or a vehicle seat 10 according to the invention (see FIG. 2).

[0066] The electrode elements 4a and 4b can only be seen in some sections in the embodiment according to FIG. 3, wherein FIG. 3 only shows a single contact region 5a or 5b of a respective electrode 4a or 4b. According to the embodiment according to FIG. 1, the electrode elements 4a or 4b can have an associated contact region 5a or 5b for each heating element 6a, 6b or 6c, which contact region is designed in accordance with the contact region 5a or 5b shown in FIG. 3. In order to increase the surface area in the longitudinal direction of the respective heating element 6a, 6b or 6c, the electrode elements 4a and 4b in the embodiment according to FIG. 3 run in a spiral shape in the respective contact region 5a and 5b. In all further sections which adjoin the respective contact region 5a or 5b, the electrode elements 4a and 4b have a straight or at least approximately straight course, but can also run in a sinusoidal shape in further embodiments.

LIST OF REFERENCE SYMBOLS

[0067] 1 heating device [0068] 2 substrate [0069] 4a/4b electrode elements or electrodes [0070] 5 contact region [0071] 6a/6b/6c heating element [0072] 10 vehicle seat [0073] 12 seat cushion [0074] 13 seat surface [0075] 14 backrest [0076] 16 neck support