Heating pad capable of reducing exposure value of magnetic field for automotive trim

Abstract

The utility model provides a heating pad capable of reducing the exposure value of a magnetic field for an automotive trim, which comprises a base material, and the two sides of the base material are provided with a first attaching surface and a second attaching surface; the heating assembly is arranged on the first attachment surface and / or the second attachment surface, the at least one first heating conductor loop edge heating wire and the at least one second heating conductor loop are arranged on the first attachment surface and / or the second attachment surface, the first heating conductor loop and the second heating conductor loop are mutually independent, and the directions of current passing through the first heating conductor loop and the second heating conductor loop are opposite. Therefore, the electromagnetic field generated by the current can be counteracted to reduce the exposure value of the electromagnetic field, thereby reducing the harm of the magnetic field to the human body.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically to a heating pad for automotive interiors that reduces magnetic field exposure. Background Technology

[0002] Heated car seats and steering wheels are becoming increasingly common. Generally, heating is achieved by controlling the flow of current through resistive components to regulate the temperature of the seat or steering wheel. When heating occurs, current flows through the heating wires, causing free electrons to move in a specific direction, generating an electric field. This changing electric field produces a magnetic field. When a heating pad module is engaged, the electric field changes, thus generating an electromagnetic field. This electromagnetic field propagates through space in wave form. If exposure to this electromagnetic field exceeds a certain limit, it can be harmful to the human body. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a heating pad for automotive interiors that can reduce magnetic field exposure, comprising:

[0004] The substrate has a first attachment surface and a second attachment surface on both sides;

[0005] A heating assembly disposed on the first attachment surface and / or the second attachment surface, the heating assembly comprising at least one first heating conductor circuit and at least one second heating conductor circuit, the first heating conductor circuit and the second heating conductor circuit being independent of each other and having current flowing through them in opposite directions.

[0006] According to the technical solution provided in the embodiments of this application, the number of the first heating conductor circuit and the second heating conductor circuit are equal, and the length of all the first heating conductor circuits and all the second heating conductor circuits are equal.

[0007] According to the technical solution provided in the embodiments of this application, the number of the first heating conductor circuit and the number of the second heating conductor circuit are not equal, and the sum of the conductor lengths of all the first heating conductor circuits is equal to the sum of the lengths of all the second heating conductor circuits.

[0008] According to the technical solution provided in the embodiments of this application, a flexible circuit board is provided on the substrate, and a plurality of terminal groups corresponding to the first heating conductor circuit and the second heating conductor circuit are provided on the flexible circuit board. Each terminal group includes a positive electrode portion and a negative electrode portion. The two ends of each positive electrode portion include a positive electrode input terminal and a positive electrode output terminal. The two ends of each negative electrode portion include a negative electrode input terminal and a negative electrode output terminal. The two ends of each first heating conductor circuit and the second heating conductor circuit are respectively connected to the positive electrode input terminal and the negative electrode input terminal of their corresponding terminal group.

[0009] According to the technical solution provided in the embodiments of this application, the positive terminal and the negative terminal are arranged alternately, or all the positive terminals are arranged adjacent to each other and all the negative terminals are arranged adjacent to each other.

[0010] According to the technical solution provided in the embodiments of this application, the substrate is provided with a wire harness, which includes multiple positive and negative wires. The positive wires are connected to the positive terminal and the negative wires are connected to the negative terminal. All the positive wires are arranged adjacent to each other and all the negative wires are arranged adjacent to each other. The end of the wire harness away from the flexible circuit board is connected to the vehicle power supply for supplying power to the heating component.

[0011] According to the technical solution provided in the embodiments of this application, the wiring harness is provided with a first terminal and a second terminal. All the positive wires are connected to the first terminal at the end away from the flexible circuit board, and all the negative wires are connected to the second terminal at the end away from the flexible circuit board. The first terminal and the second terminal are connected to the vehicle power supply.

[0012] According to the technical solution provided in the embodiments of this application, both the first heating conductor circuit and the second heating conductor circuit are disposed on the first attachment surface, or both are disposed on the second attachment surface.

[0013] According to the technical solution provided in the embodiments of this application, the first heating conductor circuit is disposed on the first attachment surface / the second attachment surface, and the second heating conductor circuit is disposed on the second attachment surface / the first attachment surface. The projections of the first heating conductor circuit and the second heating conductor circuit on the substrate may completely overlap or not overlap or not completely overlap.

[0014] According to the technical solution provided in the embodiments of this application, a capacitor is connected in parallel between the positive terminal and the negative terminal of the first heating conductor circuit or the second heating conductor circuit, or between the positive wire and the negative wire connected to the positive terminal and the negative terminal.

[0015] In summary, this application proposes a heating pad for automotive interiors that reduces magnetic field exposure. The pad includes a substrate with a first attachment surface and a second attachment surface on both sides; a heating assembly disposed on the first and / or second attachment surfaces; at least one first heating conductor circuit with an edge heating wire; and at least one second heating conductor circuit. The first and second heating conductor circuits are independent of each other, and the current flowing through them is in opposite directions. This can counteract the electromagnetic field generated by the current, thereby reducing the exposure value of the electromagnetic field and minimizing the magnetic field, thus avoiding harm to the human body. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a heating pad disposed on a seat according to an embodiment of this application;

[0017] Figure 2 for Figure 1 Internal diagram of A in the middle;

[0018] Figure 3 for Figure 1 Wiring diagram of the flexible circuit board in the diagram;

[0019] Figure 4 for Figure 1 A schematic diagram of the magnetic induction direction of the first heating conductor circuit in the middle;

[0020] Figure 5 for Figure 1 A schematic diagram of the magnetic induction direction in the second heating conductor circuit.

[0021] Figure 6 for Figure 1 A schematic diagram of the current direction in the first heating conductor circuit and the second heating conductor circuit.

[0022] Figure 7 A schematic diagram of the alternating arrangement of the positive and negative terminals of the heating pad disposed on the steering wheel, as provided in an embodiment of this application;

[0023] Figure 8 for Figure 7 Internal diagram of B in the middle;

[0024] Figure 9 for Figure 7 Wiring diagram of a flexible circuit board;

[0025] Figure 10 for Figure 7 A schematic diagram of the magnetic induction direction of the first heating conductor circuit in the middle;

[0026] Figure 11 for Figure 7 A schematic diagram of the magnetic induction direction in the second heating conductor circuit.

[0027] Figure 12 for Figure 7 A schematic diagram of the current direction in the first heating conductor circuit and the second heating conductor circuit.

[0028] Figure 13 A schematic diagram of the structure of a heating pad provided on a steering wheel according to an embodiment of this application, in which the positive terminals and negative terminals are arranged close to each other;

[0029] Figure 14 for Figure 13 A magnified view of part C;

[0030] Figure 15A schematic diagram of the structure of a heating pad with a first heating conductor circuit and a second heating conductor circuit disposed on both sides of a substrate, as provided in an embodiment of this application;

[0031] Figure 16 for Figure 15 A magnified view of part D;

[0032] Figure 17 A schematic diagram showing the structure of the first heating conductor circuit and the second heating conductor circuit provided in the embodiments of this application, which are disposed on both sides of the substrate composed of the first substrate and the second substrate;

[0033] Figure 18 This is a schematic diagram of the structure of a flexible circuit board with capacitors connected in parallel, as provided in an embodiment of this application.

[0034] Figure 19 A schematic diagram of the current direction of the first heating conductor circuit and the second heating conductor circuit when the positive and negative terminals are not arranged alternately, as provided in the embodiments of this application;

[0035] Figure 20 This is a schematic diagram of the structure provided in the embodiments of this application when the first conductor circuit and the second conductor circuit are respectively disposed on both sides of the substrate.

[0036] The text labels in the image represent:

[0037] 1. Substrate; 11. First substrate; 12. Second substrate; 21. First heating conductor circuit; 22. Second heating conductor circuit; 3. Flexible circuit board; 4. Wire harness; 41. First terminal; 42. Second terminal; 51. Positive wire; 52. Negative wire; 6. Controller; 7. Capacitor; a1. First steering wheel positive terminal; a2. First steering wheel positive terminal; h1. First steering wheel negative terminal; h2. First steering wheel negative terminal; g1. Second steering wheel positive terminal; g2. Second steering wheel positive terminal; b1. Second steering wheel negative terminal; b2. Second steering wheel Negative terminal output; c1, third-party steering wheel positive terminal input; c2, third-party steering wheel positive terminal output; f1, third-party steering wheel negative terminal input; f2, third-party steering wheel negative terminal output; e1, fourth-party steering wheel positive terminal input; e2, fourth-party steering wheel positive terminal output; d1, fourth-party steering wheel negative terminal input; d2, fourth-party steering wheel negative terminal output; j1, first positive terminal input; j2, first positive terminal output; k1, first negative terminal input; k2, first negative terminal output; m1, second positive terminal input; m2, second positive terminal output; n1, second negative terminal input; n2, second negative terminal output. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] As mentioned in the background section, the magnetic field exposure value includes two indicators: one is the magnetic field strength obtained by frequency domain measurement methods, and the other is the magnetic induction intensity obtained by time domain measurement methods. To reduce the harm of electromagnetic field exposure to drivers and passengers, this application proposes a heating pad for automotive interiors that can reduce magnetic field exposure values, such as... Figures 1-20 As shown, it includes:

[0041] Substrate 1, wherein the substrate 1 has a first attachment surface and a second attachment surface on both sides;

[0042] A heating assembly disposed on the first attachment surface and / or the second attachment surface, the heating assembly including at least one first heating conductor circuit 21 and at least one second heating conductor circuit 22; the first heating conductor circuit 21 and the second heating conductor circuit 22 are independent of each other and the currents passing through them are opposite to each other.

[0043] The heating pad of this application can be used in various automotive interiors such as steering wheels, seats, door panels, and armrests. When the heating pad is used in a seat, the substrate 1 is sheet-shaped. When used in a steering wheel, it can be strip-shaped to facilitate covering the steering wheel. Optionally, the circuit direction of the first heating conductor circuit 21 is clockwise, and the circuit direction of the second heating conductor circuit 22 is counterclockwise. Since the current directions are opposite, the electromagnetic field generated by the current change can be canceled to achieve the goal of reducing the exposure value of the electromagnetic field. Specifically, the magnetic field strength is reduced, thereby reducing the harm of the electromagnetic valve exposure value to passengers.

[0044] In a preferred embodiment, the number of the first heating conductor circuit 21 and the number of the second heating conductor circuit 22 are equal, and the length of each of the first heating conductor circuit 21 and the second heating conductor circuit 22 is equal.

[0045] Among them, such as Figure 1 As shown, there is one first heating conductor circuit 21 and one second heating conductor circuit 22. Figures 4-6 As shown, the current directions in the first heating conductor circuit 21 and the second heating conductor circuit 22 are opposite, and the magnetic field directions are also opposite. Figure 6In the diagram, B1 represents the magnetic field direction of the first heating conductor circuit 21, and B2 represents the magnetic field direction of the second heating conductor circuit 22, with the same magnetic field strength.

[0046] like Figure 7 As shown, there are two first heating conductor circuits 21 and two second heating conductor circuits 22. The magnetic field strength is related to the length of the conductor and the current value. When the current is the same, the lengths of all first heating conductor circuits 21 and all second heating conductor circuits 22 are equal to achieve the demagnetization purpose. Figure 10-12 The diagram shows the current and magnetic field directions of the two first heating conductor circuits 21 and the two second heating conductor circuits 22. B1 and B3 represent the magnetic field directions of the first heating conductor circuit 21, and B2 and B4 represent the magnetic field directions of the second heating conductor circuit 22.

[0047] In a preferred embodiment, the number of the first heating conductor circuit 21 and the number of the second heating conductor circuit 22 are not equal, and the sum of the conductor lengths of all the first heating conductor circuits 21 is equal to the sum of the lengths of all the second heating conductor circuits 22.

[0048] Since the magnetic field strength is related to the length of the conductor and the current value, even if the number of the first heating conductor circuit 21 and the second heating conductor circuit 22 are different, the purpose of demagnetization can be achieved as long as the conductor lengths of the two circuits are equal, provided that the magnitude of the current is the same.

[0049] In a preferred embodiment, a flexible circuit board 3 is provided on the substrate 1. The flexible circuit board 3 is provided with a plurality of terminal groups corresponding to the first heating conductor circuit 21 and the second heating conductor circuit 22. Each terminal group includes a positive electrode portion and a negative electrode portion. The two ends of each positive electrode portion include a positive electrode outlet terminal and a positive electrode inlet terminal connected to each other. The two ends of each negative electrode portion include a negative electrode inlet terminal and a negative electrode outlet terminal connected to each other. The two ends of each first heating conductor circuit 21 and the second heating conductor circuit 22 are respectively connected to the positive electrode inlet terminal and the negative electrode inlet terminal of their corresponding terminal group. The positive electrode outlet terminal and the positive electrode inlet terminal, and the negative electrode inlet terminal and the negative electrode outlet terminal are electrically connected through the internal circuit of the flexible circuit board.

[0050] Specifically, taking the heated seat pad as an example, such as Figure 7 and Figure 9The circuit includes a first heating conductor circuit 21 and a second heating conductor circuit 22. The positive terminal, positive terminal, negative terminal, and negative terminal corresponding to the first heating conductor circuit 21 are respectively the first positive terminal j1, the first positive terminal j2, the first negative terminal k1, and the first negative terminal k2. The positive terminal, positive terminal, negative terminal, and negative terminal corresponding to the second heating conductor circuit 22 are respectively the second positive terminal m1, the second positive terminal m2, the second negative terminal n1, and the second negative terminal n2.

[0051] Taking the heating pad wrapped around the steering wheel as an example, such as Figure 7 and Figure 9 As shown, the system includes two first heating conductor circuits 21 and two second heating conductor circuits 22, arranged alternately. Each first heating conductor circuit 21 includes a first steering wheel heating circuit and a third steering wheel heating circuit, while each second heating conductor circuit 22 includes a second steering wheel heating circuit and a fourth steering wheel heating circuit. The positive terminal, positive terminal outlet, negative terminal, and negative terminal contact point corresponding to the first steering wheel heating circuit are respectively: first steering wheel positive terminal a1, first steering wheel positive terminal outlet a2, first steering wheel negative terminal outlet h1, and first steering wheel negative terminal outlet h2. Similarly, the positive terminal, positive terminal outlet, negative terminal, and negative terminal contact point corresponding to the second steering wheel heating circuit are respectively: second steering wheel positive terminal outlet g1, second steering wheel positive terminal outlet g2, second steering wheel negative terminal outlet b1, and second steering wheel negative terminal outlet b2. The positive terminal, positive terminal outlet, negative terminal, and negative terminal contact of the third-party steering wheel heating circuit are respectively the third-party steering wheel positive terminal c1, the third-party steering wheel positive terminal outlet c2, the third-party steering wheel negative terminal outlet f1, and the third-party steering wheel negative terminal outlet f2; the positive terminal, positive terminal outlet, negative terminal, and negative terminal contact of the fourth-party steering wheel heating circuit are respectively the fourth-party steering wheel positive terminal outlet e1, the fourth-party steering wheel positive terminal outlet e2, the fourth-party steering wheel negative terminal outlet d1, and the fourth-party steering wheel negative terminal outlet d2.

[0052] In a preferred embodiment, all the positive electrode terminals and all the negative electrode terminals are respectively led to both sides of the substrate by a lead wire.

[0053] like Figure 15 and Figure 16As shown, taking the heating pad wrapped on the steering wheel as an example, the heating component is located on one side of the substrate. The first steering wheel positive terminal a1, the third steering wheel positive terminal c1, the fourth steering wheel positive terminal e1, and the second steering wheel positive terminal g1 are introduced into the front of the substrate through a thread. The second steering wheel negative terminal b1, the fourth steering wheel negative terminal d1, the third steering wheel negative terminal f1, and the first steering wheel negative terminal h1 are introduced into the back of the substrate through a thread. The end of the thread away from the substrate is connected to the vehicle power supply.

[0054] In a preferred embodiment, the positive terminal and the negative terminal are arranged alternately, or all the positive terminals are arranged adjacent to each other and all the negative terminals are arranged adjacent to each other.

[0055] Specifically, the positive and negative terminals can be arranged alternately or non-alternately. When arranged alternately, taking the heating pad on the seat as an example, its distribution is: first positive terminal a1, second negative terminal b1, second positive terminal g1, and first negative terminal h1; taking the heating pad on the steering wheel as an example, its distribution is: first steering wheel positive terminal a1, second steering wheel negative terminal b1, third steering wheel positive terminal c1, fourth steering wheel negative terminal d1, fourth steering wheel positive terminal e1, third steering wheel negative terminal f1, second steering wheel positive terminal g1, and first steering wheel negative terminal h1.

[0056] Specifically, such as Figure 19 As shown, when the positive and negative terminals are not arranged alternately, taking the heating pad on the steering wheel as an example, the arrangement of the positive and negative terminals is as follows: the distribution is: first steering wheel positive terminal a1, second steering wheel positive terminal g1, third steering wheel negative terminal f1, fourth steering wheel negative terminal d1, fourth steering wheel positive terminal e1, third steering wheel positive terminal c1, second steering wheel negative terminal b1, and first steering wheel negative terminal h1.

[0057] Specifically, when the positive and negative terminals are arranged alternately, it is the same as the arrangement of the positive and negative terminals. Taking the heated seat as an example, the arrangement of the positive and negative terminals is: first positive terminal a2, second negative terminal b2, second positive terminal g2, and first negative terminal h2. Taking the heated steering wheel as an example, the arrangement of the positive and negative terminals is: first steering wheel positive terminal a2, second steering wheel negative terminal b2, third steering wheel positive terminal c2, fourth steering wheel negative terminal d2, fourth steering wheel positive terminal e2, third steering wheel negative terminal f2, second steering wheel positive terminal g2, and first steering wheel negative terminal h2. The positive terminal and positive terminal output, and the negative terminal and negative terminal output are connected through the back plate of the flexible circuit board 3. This arrangement of the terminals ensures that the positive terminal and positive terminal output, as well as the negative terminal and negative terminal output, correspond one-to-one. The wires connecting the two are straight lines with the shortest distance, making the connection method on the flexible circuit board 3 the simplest.

[0058] Specifically, all positive terminals are arranged adjacent to each other, and all negative terminals are arranged adjacent to each other. For example, taking a heated seat pad, the arrangement of the positive and negative terminals is: first positive terminal j2, second positive terminal m2, second negative terminal n2, and first negative terminal k2. Taking a heated steering wheel pad as an example, the arrangement of the positive and negative terminals is: first steering wheel positive terminal a2, third steering wheel positive terminal c2, fourth steering wheel positive terminal e2, second steering wheel positive terminal g2, second steering wheel negative terminal b2, fourth steering wheel negative terminal d2, third steering wheel negative terminal f2, and first steering wheel negative terminal h2.

[0059] In a preferred embodiment, the substrate 1 is provided with a wiring harness 4, which includes multiple positive wires 51 and negative wires 52. The positive wires 51 are connected to the positive terminal, and the negative wires 52 are connected to the negative terminal. All the positive wires 51 are arranged adjacent to each other, and all the negative wires 52 are arranged adjacent to each other. The end of the wiring harness 4 away from the flexible circuit board 3 is connected to the vehicle power supply for supplying power to the heating component.

[0060] Specifically, when the arrangement of the positive and negative terminals is the same as the arrangement of the positive wire 51 and the negative wire 52, the wires 51 and 52 can be prevented from crossing when connected to the positive and negative terminals. When the positive and negative terminals are arranged alternately, the positive wire 51 and 52 are arranged in a crisscross pattern within the wire harness 4 before connecting to the positive and negative terminals, thus preventing the exposed positive and negative wires 51 and 52 from crossing.

[0061] In a preferred embodiment, the wiring harness 4 is provided with a first terminal 41 and a second terminal 42. All the positive wires 51 are connected to the first terminal 41 at the end away from the flexible circuit board 3, and all the negative wires 52 are connected to the second terminal 42 at the end away from the flexible circuit board 3. The first terminal 41 and the second terminal 42 are connected to the vehicle power supply.

[0062] Specifically, the first terminal 41 and the second terminal 42 are connected to the vehicle power supply via the controller 6; the number of wiring points of the first terminal 41 and the second terminal 42 are the same, and are selected according to the number of the first heating conductor circuit 21 and the second heating conductor circuit 22.

[0063] In a preferred embodiment, both the first heating conductor circuit 21 and the second heating conductor circuit 22 are disposed on the first attachment surface, or both are disposed on the second attachment surface.

[0064] Optionally, the first heating conductor circuit 21 and the second heating conductor circuit 22 are alternately arranged from the outside to the inside along the first or second attachment surface.

[0065] Specifically, taking a heated seat pad as an example, a first heating conductor circuit 21 is coiled on the first or second attachment surface to form a first heating area, and a second heating conductor circuit 22 is disposed within the first heating area. The first heating conductor circuit 21 is symmetrically arranged along the length extension of the substrate 1, and each side includes multiple bending spaces arranged in a 45° direction. The second heating conductor circuit 22 has the same orientation as the first heating conductor circuit 21, and each side includes multiple first bends arranged in a 45° direction within the bending spaces.

[0066] Taking the heated pad on the steering wheel as an example, it includes a first steering wheel heating circuit and a third steering wheel heating circuit with the same current direction, and a second steering wheel heating circuit and a fourth steering wheel heating circuit with the same current direction. The distribution from the outside to the inside is as follows: first steering wheel heating circuit, third steering wheel heating circuit, second steering wheel heating circuit, and fourth steering wheel heating circuit. The first steering wheel heating circuit is coiled at the edge of the first or second substrate, forming a first heating zone inside. The second steering wheel heating circuit is coiled within the first heating zone, forming a second heating zone inside. The third steering wheel heating circuit includes coiled areas along the first direction at both ends of the second heating zone. Each coiled area includes multiple serpentine coiled second bends. A third heating zone is formed between two coiled areas. The fourth steering wheel heating circuit includes multiple parallel serpentine coiled heating lines distributed along the second direction, where the second direction is parallel to the first direction. The first direction is parallel to the length of the substrate 1, and the second direction is parallel to the width of the substrate 1.

[0067] In a preferred embodiment, the first heating conductor circuit 21 is disposed on the first attachment surface / second attachment surface, and the second heating conductor circuit 22 is disposed on the second attachment surface / first attachment surface. The projections of the first heating conductor circuit 21 and the second heating conductor circuit 22 on the substrate 1 may completely overlap or not overlap or not completely overlap.

[0068] Specifically, the first heating conductor circuit 21 and the second heating conductor circuit 22 of the heating assembly can be located on the same side of the substrate 1 or on both sides of the substrate 1.

[0069] Furthermore, such as Figure 20 As shown, the heating assembly includes four first heating conductor circuits 21 and four second heating conductor circuits 22. The first heating conductor circuits 21 and the second heating conductor circuits 22 are located on both sides of the substrate 1, and both the positive and negative electrode input terminals are led out through lead wires; as shown... Figure 17 As shown, the substrate 1 includes a first substrate 11 and a second substrate 12 disposed on one side of the first substrate 11. The surfaces of the first substrate 11 and the second substrate 12 that are far apart from each other are the first attachment surface and the second attachment surface, respectively. The design of two layers of substrate 1, first substrate 11 and second substrate 12, avoids short circuit caused by contact between the heating conductor circuits on both sides.

[0070] In a preferred embodiment, a capacitor 7 is connected in parallel between the positive terminal and the negative terminal of the first heating conductor circuit 21 or the second heating conductor circuit 22, or between the positive wire 51 and the negative wire 52 connected to the positive terminal and the negative terminal.

[0071] Specifically, all the first heating conductor circuits 21 and all the second heating conductor circuits 22, as well as the first heating conductor circuit 21 and the second heating conductor circuit 22, are connected in parallel. All the capacitors 7 corresponding to each of the first heating conductor circuits 21 or the second heating conductor circuit 22 are also connected in parallel. The capacitors 7 can be placed on the heating pad or on the wire harness 4. Because the capacitors 7 have the property of passing AC and blocking DC, they can form an RC filter circuit with the first heating conductor circuit 21 or the second heating conductor circuit 22. This filter circuit further filters out a portion of the electromagnetic field, thereby reducing the exposure value of the electromagnetic field, specifically reducing the magnetic induction intensity, and thus reducing the harm of electromagnetic field exposure to the human body.

[0072] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A heating pad for automotive interiors that reduces magnetic field exposure, characterized in that, include: Substrate (1), wherein the substrate (1) has a first attachment surface and a second attachment surface on both sides; A heating assembly disposed on the first attachment surface and / or the second attachment surface, the heating assembly comprising at least one first heating conductor circuit (21) and at least one second heating conductor circuit (22), the first heating conductor circuit (21) and the second heating conductor circuit (22) being independent of each other and having current flowing through them in opposite directions.

2. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 1, characterized in that, The number of the first heating conductor loop (21) and the second heating conductor loop (22) are equal, and the length of all the first heating conductor loops (21) and all the second heating conductor loops (22) is equal.

3. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 1, characterized in that, The number of the first heating conductor loop (21) and the second heating conductor loop (22) are not equal, and the sum of the conductor lengths of all the first heating conductor loops (21) is equal to the sum of the lengths of all the second heating conductor loops (22).

4. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 1, characterized in that, The substrate (1) is provided with a flexible circuit board (3), and the flexible circuit board (3) is provided with a plurality of terminal groups corresponding to the first heating conductor circuit (21) and the second heating conductor circuit (22). Each terminal group includes a positive electrode part and a negative electrode part. The two ends of each positive electrode part include a positive electrode inlet end and a positive electrode outlet end. The two ends of each negative electrode part include a negative electrode inlet end and a negative electrode outlet end. The two ends of each first heating conductor circuit (21) and second heating conductor circuit (22) are respectively connected to the positive electrode inlet end and the negative electrode inlet end of their corresponding terminal group.

5. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 4, characterized in that, The positive terminal and the negative terminal are arranged alternately, or all the positive terminals are arranged adjacent to each other and all the negative terminals are arranged adjacent to each other.

6. The heating pad for automotive interiors that reduces magnetic field exposure according to claim 4 or 5, characterized in that, The substrate (1) is provided with a wire harness (4), which includes multiple positive wires (51) and negative wires (52). The positive wires (51) are connected to the positive terminal, and the negative wires (52) are connected to the negative terminal. All the positive wires (51) are arranged adjacent to each other, and all the negative wires (52) are arranged adjacent to each other. The end of the wire harness (4) away from the flexible circuit board (3) is connected to the vehicle power supply for supplying power to the heating component.

7. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 6, characterized in that, The wiring harness (4) is provided with a first terminal (41) and a second terminal (42). All the positive wires (51) are connected to the first terminal (41) at the end away from the flexible circuit board (3), and all the negative wires (52) are connected to the second terminal (42) at the end away from the flexible circuit board (3). The first terminal (41) and the second terminal (42) are connected to the vehicle power supply.

8. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 2, characterized in that, The first heating conductor circuit (21) and the second heating conductor circuit (22) are both disposed on the first attachment surface, or both are disposed on the second attachment surface.

9. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 2, characterized in that, The first heating conductor circuit (21) is disposed on the first attachment surface / the second attachment surface, and the second heating conductor circuit (22) is disposed on the second attachment surface / the first attachment surface. The projections of the first heating conductor circuit (21) and the second heating conductor circuit (22) on the substrate (1) may completely overlap or not overlap or not completely overlap.

10. The heating pad for reducing magnetic field exposure in automotive interiors according to claim 6, characterized in that, A capacitor (7) is connected in parallel between the positive terminal and the negative terminal of the first heating conductor circuit (21) or the second heating conductor circuit (22), or between the positive wire (51) and the negative wire (52) connected to the positive terminal and the negative terminal.

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