Abstract
The present disclosure describes a heating element for, e.g., an electrically drivable motor vehicle. The heating element includes a heating body having large heating areas oriented opposite one another, at least one insulating body for electrical insulation, and at least one functional body for providing an electrical conducting function and a bonding function. The at least one functional body includes a pair of fiction bodies having large functional body areas oriented opposite to one another. The pair of functional bodies are arranged on the heating body such that at least one large heating area lies substantially with its full surface area against a respective large functional body area of the respective functional body. The at least one functional body is of a two-part or multi-part structure.
Claims
1. A heating element comprising: a heating body for converting electrical energy into thermal energy, the heating body having large heating areas oriented opposite one another, at least one insulating body for electrical insulation, at least one functional body for providing an electrical conducting function and for providing a bonding function, the at least one functional body having large functional body areas oriented opposite one another, the at least one functional body including a pair of functional bodies arranged on the heating body, so that in each case at least one large heating area lies substantially with its full surface area against a large functional body area of a respective one of the pair of functional bodies, the at least one insulating body being arranged on the at least one functional body, so that the insulating body lies substantially with its full surface area against a large functional body area of the respective functional body, wherein the at least one functional body is of a two-part or multi-part structure.
2. The heating element according to claim 1, wherein the at least one functional body has at least one conductor structure part for providing the electrical conducting function, and wherein the at least one functional body is electrically contacted on the heating body via the at least one conductor structure part.
3. The heating element according to claim 1, wherein the at least one functional body has at least one bonding structure part for providing the bonding function, and wherein the at least one functional body is fixed via the at least one bonding structure part on at least one of the heating body and the insulating body with at least one of a material-bonding connection, a force-fitting connection, and a form-fitting connection.
4. The heating element according to claim 2, wherein the large heating area lying against the large functional body area is electrically contacted by the at least one conductor structure part over 0.1% to 50% of its surface area.
5. The heating element according to claim 2, wherein at least one of: the at least one conductor structure part forms 0.1% to 50% of a volume of the at least one functional body, and the at least one conductor structure part forms 0.1% to 50% of at least one of the surface area of the large functional body area on the heating body side and the surface area of the large functional body area on the insulating body side.
6. The heating element according to claim 2, wherein the at least one conductor structure part is provided by a conductor path assembly comprising at least one electrically conductive conductor path for providing the electrically conducting function, wherein one of: the conductor path assembly has exactly one single electrically conductive conductor path, the conductor path assembly has a number of electrically conductively separated conductor paths, and the conductor path assembly has a number of conductor paths electrically conductively connected to one another with a material-bonding effect.
7. The heating element according to claim 6, wherein one of: the at least one conductor path the conductor path assembly defines a comb-shaped, grid-shaped, cross-grid-shaped, meander-shaped or zig-zag-shaped conductor path pattern, the at least one conductor has a cross-sectional area that is oriented transversely in relation to a respective main direction of extent and is substantially rectangular or polygonal and constant or variable in surface area along the respective main direction of extent, the cross-sectional area being wider in a surface area than in the region of a free end of the heating element arranged at a distance from the surface area, and the at least one conductor path has a conductor path pattern that forms 0.1% to 50% of the surface area of the large functional body areas to provide a relatively closely or relatively widely meshed conductor path pattern.
8. The heating element according to claim 3, wherein one of: the at least one bonding structure part is structured and arranged to complement and supplement at least one conductor structure part of the at least one functional body, and the large heating area lying against the large functional body area is connected in a bonding manner by the at least one bonding structure part over 50% to 99.9% of its surface area, and the at least one insulating body is connected in this way over 50% to 100% of its surface area.
9. The heating element according to claim 3, wherein at least one of: the at least one bonding structure part forms 50% to 99.9% of a volume of the at least one functional body, and the at least one bonding structure part forms 50% to 99.9% of at least one of the surface area of the large functional body area on the heating body side and the surface area of the large functional body area on the insulating body side.
10. The heating element according to claim 3, wherein the at least one bonding structure part is provided by a bonding path assembly comprising at least one bonding path with a bonding effect for providing the bonding function, and wherein one of: the bonding path assembly comprising exactly one single bonding path, the bonding path assembly has a number of bonding paths that are separate from one another, and the bonding path assembly has a number of bonding paths connected to one another with a material-bonding effect.
11. The heating element according to claim 10, wherein at least one of: the at least one bonding path of the bonding path assembly defines a comb-shaped, grid-shaped, cross-grid-shaped, meander-shaped or zig-zag-shaped bonding path pattern, the at least one bonding path has a bonding path pattern that forms 50% to 99.9%, of the surface area of the large functional body areas to provide a relatively closely or relatively widely meshed bonding path pattern, and the at least one bonding path has a bonding path pattern structured and arranged complement and supplement a conductor path pattern.
12. The heating element according to claim 1, wherein the heating body has an imaginary mirror plane or an imaginary mirror line, with respect to which the pair of functional bodies are formed in a mirror-inverted or linear mirror-inverted manner, to provide a mirror-diagonal arrangement with respect to the imaginary mirror plane or with respect to the imaginary mirror line, to compensate for a force effect of the heating body flowed through by current.
13. The heating element according to claim 1, wherein one of: an intermediate layer is arranged between one or all of the large heating areas and one or all of the large functional body areas, at least one of the at least one insulating body and the heating body has at least one open recess, in which the at least one functional body is arranged.
14. A heating assembly for heating a fluid, comprising: at least one heating element, the at least one heating element including: a heating body for converting electrical energy into thermal energy, the heating body having large heating areas oriented opposite one another, at least one insulating body for electrical insulation, at least one functional body for providing an electrical conducting function and for providing a bonding function, the at least one functional body including a pair of functional bodies having large functional body areas oriented opposite one another, the pair of functional bodies arranged on the heating body, such that at least one large heating area lies substantially with its full surface area against a respective large functional body area of a respective one of the pair of functional bodies, the at least one insulating body arranged on the at least one functional body, such that the insulating body lies substantially with its full surface area against a respective large functional body area of the respective functional body, wherein the at least one functional body is of a two-part or multi-part structure; at least one circuit board for receiving and supplying power to the at least one heating element; wherein the at least one heating element is operably arranged on the at least one circuit board.
15. A motor vehicle comprising: an air-conditioning device for setting an air temperature within a motor vehicle interior, at least one heating element, the at least one heating element including: a heating body for converting electrical energy into thermal energy, the heating body having large heating areas oriented opposite one another, at least one insulating body for electrical insulation, at least one functional body for providing an electrical conducting function and for providing a bonding function, the at least one functional body including a pair of functional bodies having large functional body areas oriented opposite one another, the pair of functional bodies arranged on the heating body, such that at least one large heating area lies substantially with its full surface area against a respective large functional body area of a respective one of the pair of functional bodies, the at least one insulating body arranged on the at least one functional body, such that the insulating body lies substantially with its full surface area against a respective large functional body area of the respective functional body, wherein the at least one functional body is of a two-part or multi-part structure.
16. The motor vehicle according to claim 15, wherein the at least one functional body has at least one conductor structure part for providing the electrical conducting function, and wherein the at least one functional body is electrically contacted on the heating body via the at least one conductor structure part.
17. The motor vehicle according to claim 15, wherein the at least one functional body has at least one bonding structure part for providing the bonding function, and wherein the at least one functional body is fixed via the at least one bonding structure part on at least one of the heating body and the insulating body with at least one of a material-bonding connection, a force-fitting connection, and a form-fitting connection.
18. The heating assembly according to claim 14, wherein the at least one functional body has at least one conductor structure part for providing the electrical conducting function, and wherein the at least one functional body is electrically contacted on the heating body via the at least one conductor structure part.
19. The heating assembly according to claim 14, wherein the at least one functional body has at least one bonding structure part for providing the bonding function, and wherein the at least one functional body is fixed via the at least one bonding structure part on at least one of the heating body and the insulating body with at least one of a material-bonding connection, a force-fitting connection, and a form-fitting connection.
20. The heating element according to claim 1, further comprising an electrically conductive intermediate layer composed of a silver material
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0042] In the drawings, in each case schematically
[0043] FIG. 1 shows a perspective view of a preferred exemplary embodiment of a heating element,
[0044] FIG. 2 shows the heating element from FIG. 1 in an exploded representation,
[0045] FIG. 3 shows the heating element from FIG. 1 in a plan view according to an arrow III indicated there, a housing and an insulating body having been removed in order to afford a free view of components lying thereunder, in particular of a functional body,
[0046] FIG. 4 shows the heating element from FIG. 3 in a sectional view according to a sectional line IV-IV indicated there by a dotted line,
[0047] FIG. 5 shows an enlarged portion of the heating element from FIG. 3 in a plan view, a comb-like conductor path and bonding path pattern being evident in particular,
[0048] FIG. 6 shows a portion of a further preferred exemplary embodiment of a heating element in a further plan view, the heating element being designed substantially identically to the heating element according to FIG. 1, though with a different conductor path and bonding path pattern, to be specific a further conductor path and bonding path pattern that is relatively widely meshed with respect to the exemplary embodiment according to FIG. 1 to 5 and likewise comb-like,
[0049] FIG. 7 shows a portion of a further preferred exemplary embodiment of a heating element in a further plan view, the heating element being designed substantially identically to the heating element according to FIG. 1, though with a different conductor path and bonding path pattern, to be specific a conductor path and bonding path pattern that is designed in a meandering form,
[0050] FIG. 8 shows a portion of a further preferred exemplary embodiment of a heating element in a further plan view, the heating element being designed substantially identically to the heating element according to FIG. 1, though with a different conductor path and bonding path pattern, to be specific a further conductor path and bonding path pattern that is relatively widely meshed with respect to the exemplary embodiment according to FIG. 7 and likewise designed in a meandering form,
[0051] FIG. 9 shows a portion of a further preferred exemplary embodiment of a heating element in a further plan view, the heating element being designed substantially identically to the heating element according to FIG. 1, though with a different conductor path and bonding path pattern, to be specific a conductor path and bonding path pattern that is designed in the form of a cross or grid,
[0052] FIG. 10 shows a portion of a further preferred exemplary embodiment of a heating element in a further plan view, the heating element being designed substantially identically to the heating element according to FIG. 1, though with a different conductor path and bonding path pattern, to be specific a further conductor path and bonding path pattern that is relatively widely meshed with respect to the exemplary embodiment according to FIG. 9 and likewise designed in the form of a cross or grid,
[0053] FIG. 11 shows a plan view of a further preferred exemplary embodiment of a heating element, in particular one functional body being indicated by a polygonal area shown in black and a further functional body being indicated by an area enclosed by dotted lines,
[0054] FIG. 12 shows a further preferred exemplary embodiment of a heating element in a sectional view,
[0055] FIG. 13 shows a further preferred exemplary embodiment of a heating element in a sectional view.
DETAILED DESCRIPTION
[0056] FIGS. 1 to 13 show altogether a number of preferred exemplary embodiments of a heating element 1, in particular a PTC heating element, which preferably serves for heating a fluid, preferably air or a temperature control fluid. Such heating elements 1 are preferably used in electrically drivable motor vehicles, in particular in electrically drivable road motor vehicles, more preferably in hybrid motor vehicles. For example, such heating elements 1 are fitted in heating assemblies installed in the bodies of such vehicles, in particular PTC heating assemblies, which serve for heating interior air.
[0057] FIG. 1 shows a preferred exemplary embodiment of a heating element 1 in a perspective view, with a housing 26, in particular a tubular housing. Inside, in particular completely inside, the housing 26, a number of components of the heating element 1 are arranged, to be specific at least one heating body 2, at least one functional body 6 and also at least one insulating body 5. In the present case, a pair of functional bodies 6 and a pair of insulating bodies 5 and a single heating body 2 are provided inside the housing 26. In any event, these components functionally interact in such a way that the heating body 2 can convert electrical energy provided at the heating element 1 into thermal energy, which can be used by the user, for example for heating fluid, in particular interior air.
[0058] The heating element 1 according to FIG. 1 preferably defines a Cartesian coordinate system. For this purpose, the heating element 1 defines a main axis 27 along its main direction of extent. Also defined is a transverse axis 28, which is defined orthogonally in relation to the main axis 27 and orthogonally in relation to a surface normal of a large area 21, 22 of the heating element 1. A person skilled in the art appreciates in this connection that a large area 21, 22 is designed as larger in terms of its surface area than for example a peripheral lateral heating element area 30 of the heating element 1 connecting the two large areas 21, 22 of the heating element 1 to one another. Also defined is a vertical axis 29, which is oriented orthogonally in relation to the transverse axis 28 and orthogonally in relation to the main axis 27.
[0059] In FIG. 1 it can also be seen that the heating element 1 has socket connectors, denoted by the designation 16 and protruding beyond the housing 26 in the direction of the main axis 27. The socket connectors 16 are in principle formed in each case by a functional body 6 or in each case by an insulating body 5. The socket connectors 16 have the purpose of receiving at least one conductor structure part 9, still to be discussed below, for which purpose each socket connector 16 defines a socket-connector mounting area 31. By way of example, the socket connectors 16 or the socket-connector mounting areas 31 are spaced apart from one another in the direction of the vertical axis 29 and aligned parallel with respect to a plane defined by the main axis 27 and the transverse axis 28. By this design it is possible for example to arrange a heating element 1 on a PCB (PCB: printed circuit board), for example in order to provide a heating assembly that can be used on a vehicle.
[0060] To allow them to be seen better, FIG. 2 shows the components of the heating element 1 according to FIG. 1 in an exploded representation. It can be seen in particular that a pair of insulating bodies 5, a pair of functional bodies 6 and also a heating body 2 have been withdrawn from the aforementioned housing 26 and arranged spaced apart transversely in relation to one another, so that the individual components can be seen relatively well. The heating body 2 expediently serves the purpose of converting electrical energy provided at the heating element 1 into thermal energy that can be used by a user. Expediently, the heating body 2 is designed for this purpose as a PTC heating body and defines two large heating areas 3, 4 oriented opposite one another.
[0061] According to FIG. 2, it can also be seen that the heating body 2 is made up of a number of individual heating body elements, which are preferably lined up one against the other in the direction of the main axis 27. It may also be provided that the heating body 2 is formed just by a single heating body element. In any event, the heating body 2 is flanked on each of both sides by a functional body 6, which in each case serve for providing an electrical conducting function and for providing a bonding function. Each functional body 6 defines a pair of large functional body areas 7, 8 oriented opposite one another. The large functional body areas 7, 8 are in the present case referred to for example as heating-body-side large functional body areas 7 or large functional body areas 7 facing away from the insulating body, if the respective large functional body areas 7 are facing the heating body 2. Equally, in the present case large functional body areas 8 are referred to as large functional body areas 8 facing away from the heating body or as large functional body areas 8 on the insulating body side if the respective large functional body areas 8 are facing insulating bodies 5 still to be described below. At least one insulating body 5 is in each case arranged on the large functional body areas 7, 8, in particular on the large functional body areas 8 on the insulating body side, of the functional bodies 6, each insulating body 5 serving for the electrical insulation of the heating element 1.
[0062] It is thus essential that a pair of functional bodies 6 are in each case arranged on the heating body 2 in such a way that at least one large heating area 3, 4 lies substantially with its full surface area or with its full surface area against a large functional body area 7 in each case of the respective functional body 6. Furthermore, an insulating body 5 is arranged on at least one functional body 6, in such a way that the respective insulating body 5 lies substantially with its full surface area or with its full surface area against a large functional body area 8 facing away from the heating body of the respective functional body 6. It is essential to the invention that at least one functional body 6 is of a two- or multi-part design. In FIG. 2, it can be seen for example that the functional bodies 6 have in each case a conductor structure part 9 and also a bonding structure part 10, the conductor structure part 9 providing an electrical conducting function and the bonding structure part 10 providing a bonding function. This advantageously achieves the effect that the respective functional body 6 can be arranged on the heating body 2 in an electrically contacting manner and also the respective insulating bodies 5 can be arranged on the heating body 2 in a bonding manner. In this connection, it can be imagined for example that the bonding structure part 10 forms a material-bonding and/or form-fitting and/or force-fitting connection, in particular a joining connection, between the heating body 2 on the one hand and the respective insulating body 5 on the other hand.
[0063] FIG. 3 shows the heating element 1 from FIG. 1 in a plan view according to an arrow III indicated there, the housing 26 and an insulating body 5 having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. Specifically, in the present case an insulating body 5 can be seen, arranged as it were parallel to the plane of the page and extending along the vertical axis 27 and along the transverse axis 28. Arranged in surface-area contact on the insulating body 5 are, in this sequence, a largely concealed functional body 6, a heating body 2 and also a further functional body 6. All that can be seen of the functional body 6 lying at the bottom is a contacting area 32, which is arranged on a socket-connector mounting area 31 of a socket connector 16 of the insulating body 5. By means of a contacting area 32, the respective functional body 6 can for example be arranged on a PCB with electrical contact, so that for example operating voltage can be provided at the respective functional body 6. The heating body 2 arranged on the functional body 6 lying at the bottom has a number of heating body elements, which are lined up in contact with one another along the main axis 27. Arranged on the heating body 2 is a further functional body 6, which by way of example is of a two-part form, to be specific a conductor structure part 9 and a bonding structure part 10. The conductor structure part 9 is indicated by way of example by a number of lines arranged in the manner of a comb and likewise has a contacting area 32, arranged on the socket-connector mounting area 31, for the electrical contacting. The bonding structure part 10 is in the present case for example an adhesive or a glass solder and is symbolized by the free white intermediate regions between the lines of the conductor structure part 9. In any event, each functional body 6 is designed in such a way that the respective conductor structure parts 9 and bonding structure parts 10 form a continuous, uninterrupted body, in particular a relatively thin layer, for example 0.1 mm, 0.2 mm, 0.3 mm to 1 mm thick.
[0064] The conductor structure part 9 comprises by way of example a conductor path assembly 11 comprising a number of conductor paths 12. The conductor path assembly 11 or the conductor paths 12 together form a conductor path pattern 13. According to FIG. 3, the conductor path pattern 13 is by way of example of a comb-like design. The bonding structure part 10 is preferably formed as complementing and supplementing the conductor structure part 9, so that according to FIG. 3 a bonding path pattern 20 is formed by a bonding path assembly 18 comprising bonding paths 19 in a way analogous to the conductor path pattern 13. The individual comb-like path structures of the conductor path pattern 13 and of the bonding path pattern 20 in this case preferably engage in one another in a tooth-like and gapless manner.
[0065] FIG. 4 shows the heating element 1 from FIG. 3 in a sectional view according to a sectional line IV-IV indicated there by a dotted line, so that as it were cross-sectional areas 15 of the components described above can be seen. In particular, it can be seen relatively well that the heating body 2 is enclosed as it were in the manner of a layer or in the manner of a sandwich between the functional bodies 6 and the insulating bodies 5. According to FIG. 4, as a departure from FIGS. 1 to 3, it is envisaged to arrange an intermediate layer 23 in each case between the heating body 2 and the two functional bodies 6. The intermediate layer 23 is for example produced from silver or copper material and serves the purpose of improving the electrical connection of the functional bodies 6, or of the electrically conductive conductor structure parts 9, to the heating body 2.
[0066] According to FIG. 4, it can also be seen that the functional bodies 6 are divided in two. To be specific, they comprise on the one hand the conductor structure part 9 and on the other hand the bonding structure part 10. It can be seen relatively well that the conductor structure part 9 has a conductor path assembly 11 comprising conductor paths 12, the cross-sectional areas 15 of which are symbolised in the present case by dotted boxes. Furthermore, it can also be seen relatively well that the bonding structure part 10 has a bonding path assembly 18 comprising bonding paths 19, the cross-sectional areas 15 of which are in the present case symbolized by cross-hatched boxes.
[0067] In FIG. 5 a portion of the heating element 1 from FIG. 3 is shown in a plan view, where comb-like conductor path and bonding path patterns 13, 20 can be seen in particular. Preferably, the conductor paths 12 or the bonding paths 19 extend substantially parallel to the transverse axis 28 according to FIG. 1. Expediently, the conductor path pattern 13 is relatively closely meshed, in particular so closely meshed that a surface-area contacting of the heating body 2 or of the intermediate layer 23 can be realized with the conductor paths 12 over 0.1% to 50% of its surface area.
[0068] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 6 are provided with the same designations as in FIG. 1 to 5. In FIG. 6, a portion of a preferred further exemplary embodiment of the heating element 1 is shown in a plan view, analogous to FIGS. 3 and 5, a housing 26 and an insulating body 5 having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. The heating element 1 is designed substantially identically to the heating element 1 according to FIG. 1. Only the conductor path and bonding path pattern 13, 20 there is differently designed. With respect to the exemplary embodiment according to FIG. 1 to 5, to be specific the present conductor path and bonding path pattern 13, 20 is designed as relatively widely meshed and comb-like.
[0069] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 7 are provided with the same designations as in FIG. 1 to 5. In FIG. 7, a portion of a preferred further exemplary embodiment of a heating element 1 is shown in a plan view, analogous to FIGS. 3 and 5, a housing 26 and an insulating body 5 having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. The heating element 1 is designed substantially identically to the heating element 1 according to FIG. 1. Only the conductor path and bonding path pattern 13, 20 there is differently designed, to be specific is designed as relatively widely meshed and in a meandering form or in a wavy curved form with respect to the transverse axis 28.
[0070] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 8 are provided with the same designations as in FIG. 1 to 5. In FIG. 8, a portion of a preferred further exemplary embodiment of a heating element 1 is shown in a plan view, analogous to FIGS. 3 and 5, a housing 26 and an insulating body 5 again having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. The heating element 1 is again designed substantially identically to the heating element 1 according to FIG. 1. Only the conductor path and bonding path pattern 13, 20 there is formed differently. With respect to the exemplary embodiment according to FIG. 7, to be specific the conductor path and bonding path pattern 13, 20 is designed as relatively widely meshed and likewise of a meandering or curved form.
[0071] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 9 are provided with the same designations as in FIG. 1 to 5. In FIG. 9, a portion of a preferred further exemplary embodiment of a heating element 1 is shown in a plan view, analogous to FIGS. 3 and 5, a housing 26 and an insulating body 5 again having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. The heating element 1 is designed substantially identically to the heating element 1 according to FIG. 1. Only the conductor path and bonding path pattern 13, 20 there is formed differently, to be specific by a conductor path and bonding path pattern designed in the form of a cross or grid.
[0072] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 10 are provided with the same designations as in FIG. 1 to 5. In FIG. 10, a portion of a preferred further exemplary embodiment of a heating element 1 is shown in a plan view, analogous to FIGS. 3 and 5, a housing 26 and an insulating body 5 again having been removed in order to afford a free view of components lying thereunder, in particular of a functional body 6. The heating element 1 is designed substantially identically to the heating element 1 according to FIG. 1. Only the conductor path and bonding path pattern 13, 20 there is formed differently, to be specific with respect to the exemplary embodiment according to FIG. 9 relatively widely meshed and likewise designed in the form of a cross or grid.
[0073] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 11 are provided with the same designations as in FIG. 1 to 5. In FIG. 11, a plan view that shows a further preferred exemplary embodiment of a heating element 1 is represented, in particular one conductor structure part 9 of the functional body 6 there being indicated by a polygonal area shown in black and the bonding structure part 10 being indicated by an area enclosed by dotted lines. It can be seen that the conductor structure part 9 there extends along the main axis 27, being formed relatively widely in terms of its surface area in the region of a socket connector 16 of an insulating body 5 of the heating element 1, i.e. preferably forming the functional body 6 over the full width transversely in relation to the main axis 27, in the direction of the transverse axis 28, in order preferably to contact the heating body 2 there over its full surface area in this portion. From the socket connector 16, the conductor structure part 9 tapers in its surface area away from the socket connector 16 in the direction of the main axis 27 towards a free end 17, so that altogether a triangular area is defined. The bonding structure part 10 is designed as it were oppositely, to be specific with a relatively small surface area in the region of the socket connectors 16 and with an increasingly larger surface area away from the socket connectors 16 in the direction of the main axis 27 towards the free end 17 of the heating element 1.
[0074] A second functional body 6, which cannot be seen in FIG. 11, arranged under the heating body 2, may be formed identically or mirror-invertedly with respect to the heating body 2, in such a way that on each of both sides of the heating body 2 a bonding structure part 10 of a triangular area and a conductor structure part 9 of a triangular area are arranged in line and preferably congruently.
[0075] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 12 are provided with the same designations as in FIG. 1 to 5. In FIG. 12, a preferred further exemplary embodiment of a heating element 1 that has the known components, to be specific in particular intermediate layers 23, functional bodies 6 and insulating bodies 5 stacked onto a heating body 2 on both sides in the manner of layers and in physical contact, is represented in a sectional view. The exemplary embodiment in the present case differs from the previous exemplary embodiments in particular in that a functional body 6 has only a single conductor path 12, which is for example flanked on both sides by a bonding path 19 of a bonding structure part 10. The respective conductor paths 12 of a functional body 6 in this case preferably extend straight along the main direction of extent of the heating body 2, in order to contact the latter electrically.
[0076] To avoid repetition, if they are similar or identical from a functional and/or design aspect to the components provided by the first exemplary embodiment according to FIG. 1 to 5, the components of the exemplary embodiment shown in FIG. 13 are provided with the same designations as in FIG. 1 to 5. In FIG. 13, a further preferred exemplary embodiment of a heating element 1 is shown in a sectional view, the insulating body 5 and/or the heating body 2 there having at least one open recess 24 structured in the manner of a conductor path, in which a functional body 6 is arranged, in particular a conductor structure parts 9 and/or conductor paths 12. For the electrical connection of the conductor structure parts 9 or the conductor paths 12, an intermediate layer 23 is provided.
