Irregular heating pad structure

Abstract

To provide an irregular heating pad structure capable of uniformly generating heat. [Solution] The irregular heating pad structure comprises a substrate assembly and a heating assembly which are matched to each other, the substrate assembly includes a first substrate 1 and a second substrate, the heating assembly is disposed between the first substrate and the second substrate, and includes a conductive portion 3 and a heating layer 4 disposed on the conductive portion, the heating layer has at least two different cross-sectional lengths in a first direction X, a plurality of mounting areas 35 are sequentially arranged along the first direction on the substrate on which the conductive portion is disposed, the conductive portion supplies power to the heating layer via an external connection circuit, the conductive portion includes a first electrode 31 and a second electrode 32, each of the two electrodes includes a main electrode segment 33 and at least one branch electrode segment 34 disposed on the corresponding main electrode segment, at least one set of heating electrode pairs is distributed in each of the mounting areas, and the electrode distances of at least two heating electrode pairs disposed in different mounting areas are not equal.

Description

[Technical field]

[0001] The present disclosure relates to the technical field of heating pad structures, and in particular to irregular heating pad structures. [Background technology]

[0002] With the development of social economy and the vehicle industry, the requirements for vehicle comfort are also increasing. In order to meet the requirements of long-distance travel, in addition to air conditioning and seat heaters, heating devices in the vehicle are increasingly preferred to be placed in other accessible positions, so as to provide passengers and drivers with a better experience.

[0003] Conventional heating devices generally use a heating film and parallel electrodes, and such heating devices are limited by their shape. In the case of an irregular shape, the electrodes cannot be arranged in parallel due to the shape restrictions, and the biggest difficulty in arranging the electrodes is how to achieve uniform heating in an irregular shape. Therefore, we provide an irregular heating pad structure that can solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above deficiencies and shortcomings in the prior art, there is a need for a non-uniform heating pad structure that can generate heat uniformly. [Means for solving the problem]

[0005] The present invention provides a non-uniform heating pad structure, which comprises a base assembly and a heating assembly that are matched to each other; the substrate assembly includes a first substrate and a second substrate, the heat generating assembly being disposed between the first substrate and the second substrate; The heat generating assembly includes a conductive portion and a heat generating layer disposed on the conductive portion, the heat generating layer having at least two different cross-sectional lengths in a first direction; The conductive part is installed on the first substrate or the second substrate. A plurality of mounting areas are arranged in sequence along the first direction on the substrate where the conductive part is installed. The areas of the heating layers in at least two of the mounting areas are different. The conductive part supplies power to the heating layer through an external connection circuit. The conductive part includes a first electrode and a second electrode. Each of the first electrode and the second electrode includes one main electrode segment and at least one branched electrode segment installed on the corresponding main electrode segment. The branched electrode segments in each of the first electrode and the second electrode are installed on the corresponding substrate and are installed alternately. Two adjacent branched electrode segments are formed as a pair of heating electrodes. At least one pair of the heating electrode pairs is distributed in each of the mounting areas, and the inter-electrode distances of at least two pairs of the heating electrode pairs installed in different mounting areas are not equal.

[0006] In the technical solution according to the present invention, when the first substrate and the second substrate on which the conductive part is installed are in the shape of a right trapezoid, the branched electrode segments in all the heating electrode pairs are distributed parallel to each other along the first direction. Along the direction in which the cross-sectional length of the corresponding substrate gradually increases in the first direction, the length of the branched electrode segment in the heating electrode pair in the mounting area gradually increases in the second direction, and the distance between two adjacent branched electrode segments gradually decreases. The second direction is perpendicular to the first direction.

[0007] In the technical solution according to the present invention, the heating layer includes a first distribution state and a second distribution state. In the case of the first distribution state, the ends of the branched electrode segments separated from the corresponding main electrode segments all extend to the outside of the edge of the heating layer. In the case of the second distribution state, the projections of the first electrode and the second electrode on the heating layer along the third direction are contained within the heating layer.

[0008] In the technical solution of the present invention, when the heating layer is in the first distribution state, the distance in the second direction between the end of the branch electrode segment and the main electrode segment in the other electrode is smaller than the distance in the second direction between the end of the branch electrode segment and the main electrode segment in the other electrode when the heating layer is in the second distribution state.

[0009] In the technical solution of the present invention, when the heating layer is in the second distribution state, the distance from the end of the branch electrode segment to the main electrode segment in the other electrode is greater than or equal to the inter-electrode distance of the heating electrode pair including the branch electrode segment.

[0010] In the technical solution of the present invention, the heat generating layer has a first heat shielding part; When the heat generating layer is in the first distribution state, the first heat shield has an opening structure provided at an edge portion of the heat generating layer, and the opening structure opens along the second direction, The heat shield is provided at an end of each of the branch electrode segments spaced from the corresponding main electrode segment.

[0011] In the technical solution of the present invention, the heat generating layer has a second heat shielding part; When the heat generating layer is in the second distribution state, the second heat shield has an opening structure provided in the heat generating layer, There are at least two of the aperture structures, and the two aperture structures are provided corresponding to ends of branch electrode segments of different main electrode segments, respectively.

[0012] In the technical solution of the present invention, the external connection circuit includes a conductive wire; There are at least two of the conductors, one end of each of the two conductors is connected to the first electrode and the second electrode, and the other end of each of the two conductors is connected to a connector, and the connector is for electrically connecting to an automobile control system.

[0013] In the technical solution of the present invention, the first substrate and the second substrate are made of a thin film material or a woven fabric material.

[0014] In the technical solution of the present invention, the material of the heating layer is graphene, carbon black or carbon nanotubes.

[0015] As mentioned above, the technical solution specifically discloses a non-uniform heating pad structure, which includes a substrate assembly and a heating assembly that are matched with each other, the substrate assembly includes a first substrate and a second substrate, the heating assembly is disposed between the first substrate and the second substrate, the heating assembly includes a conductive part and a heating layer disposed on the conductive part, and the heating layer has at least two different cross-sectional lengths in a first direction; the conductive portion is disposed on a first substrate or a second substrate, a plurality of mounting regions are arranged in sequence along a first direction on the substrate on which the conductive portion is disposed, the areas of the heat generating layer in at least two mounting regions are different, and the conductive portion supplies power to the heat generating layer via an external connection circuit; The conductive portion includes a first electrode and a second electrode, each of the first electrode and the second electrode including one main electrode segment and at least one branch electrode segment disposed on the corresponding main electrode segment, the branch electrode segments of each of the first electrode and the second electrode are disposed on corresponding substrates and are disposed alternately, and two adjacent branch electrode segments form a set of heating electrode pairs, at least one set of heating electrode pairs is distributed in each of the mounting regions, and the inter-electrode distances of at least two sets of heating electrode pairs disposed in different mounting regions are not equal. Effect of the Invention

[0016] In the heating pad structure of the present invention, the substrate on which the conductive part is installed has multiple mounting regions, and two adjacent mounting regions have different areas, thereby forming a heating layer that can be adapted to the irregular shape. In the case of different areas, the total resistance in the different mounting regions is set according to the area to ensure that the heating pad structure can be prevented from local overheating. Since the first electrode and the second electrode in the conductive part each include a main electrode segment and a branch electrode segment, the inter-electrode distance of the heating electrode pair in each mounting region can be reasonably allocated to make the heating amount of each local part of the heating pad structure uniform and prevent local overheating. [Brief description of the drawings]

[0017] Other features, objects and advantages of the invention will become more apparent from the detailed description of the non-limiting embodiments given below with reference to the drawings, in which: [Figure 1] FIG. 2 is a schematic exploded view of the irregular heating pad structure. [Diagram 2] FIG. 2 is a schematic diagram showing a first type of electrode arrangement in a non-uniform heat generating pad structure. [Diagram 3] FIG. 2 is a schematic diagram showing a first type of electrode arrangement in the irregular heat generating pad structure (including a heat shield portion). [Figure 4] FIG. 13 is a schematic diagram showing a second type of electrode arrangement in the irregular heating pad structure. [Diagram 5] FIG. 13 is a schematic diagram showing a second type of electrode arrangement in the irregular heat generating pad structure (including a heat shield portion). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present invention will be described in more detail below with reference to the drawings and examples. The specific examples described herein are merely for the purpose of illustrating the related invention, and are not intended to limit the invention. For the sake of convenience, the drawings only show parts related to the invention.

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which: FIG.

[0020] Example 1 Referring to the schematic exploded view of the irregular heating pad structure according to this embodiment and the schematic configuration diagram of the first type of electrode arrangement form shown in Figures 1 and 2, the heating pad structure comprises a substrate assembly and a heating assembly that are matched to each other.

[0021] The substrate assembly includes a first substrate 1 and a second substrate 2, and the heat generating assembly is disposed between the first substrate 1 and the second substrate 2.

[0022] The heating assembly includes a conductive part 3 and a heating layer 4 disposed on the conductive part 3 .

[0023] The heat generating layer 4 has at least two different cross-sectional lengths in a first direction.

[0024] The conductive portion 3 is disposed on the first substrate 1 or the second substrate 2. A plurality of attachment regions 35 are sequentially arranged along the first direction on the substrate on which the conductive portion 3 is disposed. The areas of the heat generating layer 4 in at least two of the attachment regions 35 are different. The conductive portion 3 supplies power to the heat generating layer 4 via an external connection circuit.

[0025] The conductive portion 3 includes a first electrode 31 and a second electrode 32. Each of the first electrode 31 and the second electrode 32 includes one main electrode segment 33 and at least one branch electrode segment 34 disposed on the corresponding main electrode segment 33. The branch electrode segments 34 in each of the first electrode 31 and the second electrode 32 are disposed on corresponding substrates and are disposed alternately, such that two adjacent branch electrode segments 34 form a heating electrode pair.

[0026] At least one pair of heating electrodes is distributed in each of the attachment regions 35. The inter-electrode distances of at least two pairs of heating electrodes installed in different attachment regions 35 are not equal.

[0027] In this embodiment, a mounting space for the heat generating assembly is formed between the first substrate 1 and the second substrate 2. Generally, the first substrate 1 and the second substrate 2 are uniform in shape, and since the substrate covers the heat generating layer 4 in a subsequent process, the substrate and the heat generating layer 4 are relatively uniform in shape, except that the substrate is slightly large in size, and the substrate may be made of a thin film material (PET or PI) or a woven material (woven fabric, plain weave fabric, waterproof fabric, etc.).

[0028] There is no substantial difference between the first substrate 1 and the second substrate 2, and for convenience of explanation, the two substrates are defined as the first substrate and the second substrate, respectively.

[0029] The heating assembly includes a conductive part 3 and a heating layer 4. The conductive part 3 is configured to control the heat generation of the heating layer 4. The conductive part 3 includes a first electrode 31 and a second electrode 32. Since the heating assembly is installed between the first substrate 1 and the second substrate 2, the first electrode 31 and the second electrode 32 are selectively installed on the first substrate 1 or the second substrate 2, and the specific installation situation can be adjusted according to the actual situation.

[0030] A plurality of mounting regions 35 are sequentially arranged along a first direction on the substrate on which the first electrode 31 and the second electrode 32 are provided. Here, the first direction is the longitudinal direction of the substrate, specifically referring to the direction indicated by the arrow X in FIG. 1. The electrodes may be made of a highly conductive material such as a printed conductive slurry or a copper plate. The adjacent mounting regions 35 have different areas, and the division of the mounting regions 35 is not particularly limited and is determined mainly based on the shape of the substrate or the heating layer 4, specifically referring to the division of the mounting regions 35 shown in FIG. 2.

[0031] Furthermore, each of the first electrode 31 and the second electrode 32 includes one main electrode segment 33 and at least one branch electrode segment 34 disposed on the corresponding main electrode segment 33 (see FIG. 2 for a specific form). When the first electrode 31 and the second electrode 32 are disposed, the main electrode segment 33 is disposed along the edge of the substrate, and the branch electrode segments 34 of each of the first electrode 31 and the second electrode 32 are disposed on the corresponding substrate, alternately disposed, and disposed across the surface of the substrate. For ease of explanation, each of two adjacent branch electrode segments 34 is defined as a pair of heating electrodes.

[0032] Since the heating layer 4 is not a regular shape (e.g., rectangular) but has at least two different cross-sectional lengths in the first direction, it is particularly important whether the heating pad structure can generate heat uniformly. In order to ensure that the heating pad structure can generate heat uniformly, it is necessary to at least ensure that each of the mounting areas 35 has one set of the heating electrode pair. Since the shapes of the substrates are different, each mounting area 35 has a different area, and in order to ensure that the heating pad structure can generate heat uniformly, it is necessary to ensure that the heating amount of each mounting area 35 is as close as possible. For the mounting area 35 with a relatively large area and the mounting area 35 with a relatively small area, the mounting area 35 with a relatively large area needs to have a relatively small total resistance value, and the mounting area 35 with a relatively small area needs to have a relatively large total resistance value, thereby balancing the heating amount per unit area. Therefore, in the irregular heating pad structure, the inter-electrode distances of at least two sets of the heating electrode pairs installed in the different mounting areas 35 are not equal, and can be adjusted according to the actual situation.

[0033] The total resistance value is determined by the number of heating electrode pairs in each of the mounting regions 35, the inter-electrode distance between two adjacent heating electrode pairs, and the dimensions and spacing of the branch electrode segments 34 in each of the heating electrode pairs, and therefore can be arranged rationally according to actual conditions.

[0034] In a preferred embodiment, as shown in FIG. 2, when the first substrate 1 and the second substrate 2 on which the conductive portion 3 is disposed are in a right-angled trapezoid shape, the branch electrode segments 34 in all the heating electrode pairs are distributed parallel to each other along the first direction.

[0035] Along the direction in which the cross-sectional length of the corresponding substrate in the first direction gradually increases, the length of the branch electrode segment 34 in the heating electrode pair in the mounting region 35 in the second direction gradually increases, and the distance between two adjacent branch electrode segments 34 gradually decreases. The second direction is perpendicular to the first direction, and specifically refers to the direction indicated by the arrow Y in FIG. 1.

[0036] As shown in FIG. 2, the shape of a right-angled trapezoid is a shape that smoothly changes from a wide portion to a narrow portion (or from a narrow portion to a wide portion), so when the shape of the substrate is a right-angled trapezoid, along the direction in which the cross-sectional length of the corresponding substrate in the first direction gradually increases, the length of the branch electrode segment 34 gradually increases, and the distance R between two adjacent branch electrode segments 34 gradually decreases. The gradual decrease in distance R means that the total resistance value gradually decreases, which can make the heat uniform between the relatively narrow end and the relatively wide end of the substrate.

[0037] As shown in FIG. 2 and FIG. 4, the heat generating layer 4 includes a first distribution state and a second distribution state.

[0038] Specifically, as shown in FIG. 2, in the first distribution state, the ends of the branch electrode segments 34 spaced apart from the corresponding main electrode segments 33 all extend to the outside of the edge of the heat generating layer 4 .

[0039] The heating layer 4 can be a heating material such as graphene, carbon black, carbon nanotubes or other conductive inks. Generally, the outer edge of the contour of the heating layer 4 is located inside the branch electrode segments 34, which can effectively prevent local short circuit and overheating.

[0040] 4, in the second distribution state, the projections of the first electrode 31 and the second electrode 32 on the substrate on one side of the heat generating layer 4 along the third direction are contained within the heat generating layer 4. Here, the third direction is the direction toward the substrate.

[0041] When the heating layer 4 is in the second distribution state, that is, when the outer edge of the contour of the heating layer 4 is located outside the branch electrode segment 34, the distance in the second direction between the branch electrode segment 34 and the main electrode segment 33 in the other electrode needs to be increased in order to prevent local overheating and short circuits.

[0042] Therefore, in a preferred embodiment, when the heating layer 4 is in the first distribution state, the distance in the second direction between the end of the branch electrode segment 34 and the main electrode segment 33 in the other electrode is smaller than the distance in the second direction between the end of the branch electrode segment 34 and the main electrode segment 33 in the other electrode when the heating layer 4 is in the second distribution state.

[0043] As shown in Figures 3 and 4, Figure 3 shows a case where the heating layer 4 is in a first distribution state, and M represents the distance from the end of each branch electrode segment 34 to the main electrode segment 33 of the other electrode in that state. Figure 4 shows a case where the heating layer 4 is in a second distribution state, and L represents the distance from the end of each branch electrode segment 34 to the main electrode segment 33 of the other electrode in that state. As can be seen by comparing Figures 3 and 4, when the heating layer 4 is in a different distribution state, the distance L shown at the same position is obviously greater than the distance M.

[0044] In a preferred embodiment, when the heating layer 4 is in the second distribution state, the distance from the end of the branch electrode segment 34 to the main electrode segment 33 in the other electrode is greater than or equal to the inter-electrode distance of the heating electrode pair including the branch electrode segment 34.

[0045] When the heat generating layer 4 is in the second distribution state, the ends of the branch electrode segments 34 and the main electrode segments 33 of the other electrodes are directly connected by the heat generating layer 4, the resistance is smaller, and local overheating is more likely to occur than when the heat generating layer 4 is in the first distribution state. Therefore, in this distribution state, the distance from the ends of the branch electrode segments 34 to the main electrode segments 33 of the other electrodes needs to be longer.

[0046] In a preferred embodiment, as shown in FIG. 3, the heating layer 4 has a first heat shield 41 to further prevent overheating and short circuiting inside the heating pad structure.

[0047] When the heat generating layer 4 is in the first distribution state, the first heat shield 41 is an open structure provided in the heat generating layer 4, and the open structure opens along the second direction.

[0048] The first heat shield 41 is provided at an end of each of the branch electrode segments 34 remote from the corresponding main electrode segment 33 .

[0049] In a preferred embodiment, the heat generating layer 4 has a second heat shield 42 as shown in FIG.

[0050] When the heat generating layer 4 is in the second distribution state, the second heat shield 42 has an open structure provided in the heat generating layer 4.

[0051] There are at least two of the opening structures, and the two opening structures are provided corresponding to the ends of the branch electrode segments 34 in the different main electrode segments 33, respectively.

[0052] The branch electrode segment 34 on which the second heat shield 42 and the first heat shield 41 are provided is a branch electrode segment 34 oriented toward another main electrode segment 33. For example, the first heat shield 41 or the second heat shield 42 is not provided in correspondence with the branch electrode segment 34 located at the top (the end remote from the connector 7) of the base material shown in Fig. 3 or Fig. 5.

[0053] In a preferred embodiment, as shown in FIG. 1, the external connection circuit includes a conductor 5 and a harness protection cover 6 disposed on the outside of the conductor 5 .

[0054] There are at least two conductors 5, one end of each of the two conductors 5 is connected to the first electrode 31 and the second electrode 32, respectively, and the other end of each of the two conductors 5 is connected to a connector 7, which is intended to be electrically connected to an automobile control system.

[0055] Specifically, a basic heating circuit is constituted by the first electrode 31, the second electrode 32, the heating layer 4, and the conductor 5. When the vehicle power supply starts to supply power to the heating circuit via the connector 7, the heating circuit becomes conductive and a current flows through the heating layer 4, which causes the heating layer 4 to generate heat.

[0056] The above is merely a description of the preferred embodiment of the present invention and the technical principles used. As can be understood by those skilled in the art, the scope of the present invention is not limited to the technical solution made by the specific combination of the above technical features, but also includes other solutions made by any combination of the above technical features or equivalent features without departing from the spirit of the present invention. For example, the technical solution made by replacing the above features with technical features having similar functions disclosed in the present invention (but not limited to this).

[0057] [Explanation of symbols]

[0058] 1 First base material 2 Second base material 3 Conductive Part 31 1st electrode 32 2nd electrode 33 Main electrode segment 34 Branched electrode segments 35 Mounting area 4 Heating layer 41 First heat shield 42 Second heat shield 5 conductor 6 Harness protection cover 7 Connectors

Claims

1. a substrate assembly and a heating assembly that are matched to each other; The substrate assembly includes a first substrate (1) and a second substrate (2), and the heat generating assembly is disposed between the first substrate (1) and the second substrate (2); The heat generating assembly includes a conductive portion (3) and a heat generating layer (4) disposed on the conductive portion (3); The heat generating layer (4) has at least two different cross-sectional lengths in a first direction, the conductive portion (3) is disposed on the first substrate (1) or the second substrate (2), a plurality of mounting regions (35) are arranged in sequence along the first direction on the substrate on which the conductive portion (3) is disposed, the areas of the heat generating layer (4) in at least two of the mounting regions (35) are different, and the conductive portion (3) supplies power to the heat generating layer (4) via an external connection circuit; the conductive portion (3) includes a first electrode (31) and a second electrode (32), each of the first electrode (31) and the second electrode (32) includes one main electrode segment (33) and at least one branch electrode segment (34) disposed on the corresponding main electrode segment (33), the branch electrode segments (34) of each of the first electrode (31) and the second electrode (32) are disposed on the corresponding substrate and are disposed alternately, and two adjacent branch electrode segments (34) are formed as a heating electrode pair; At least one pair of heating electrodes is distributed in each of the attachment regions (35), and the inter-electrode distances of at least two pairs of heating electrodes installed in different attachment regions (35) are not equal. The irregular heating pad structure is characterized by the above.

2. When the first substrate (1) and the second substrate (2) on which the conductive portion (3) is provided have a right-angled trapezoidal shape, the branch electrode segments (34) in all the heating electrode pairs are distributed parallel to each other along the first direction; Along a direction in which the cross-sectional length of the corresponding substrate in the first direction gradually increases, the length of the branch electrode segment (34) in the heating electrode pair in the attachment region (35) in the second direction gradually increases, the distance between two adjacent branch electrode segments (34) gradually decreases, and the second direction is perpendicular to the first direction.

2. The irregular heating pad structure according to claim 1.

3. The heat generating layer (4) includes a first distribution state and a second distribution state, In the first distribution state, the ends of the branch electrode segments (34) that are spaced apart from the corresponding main electrode segments (33) all extend to the outside of the edge of the heat generating layer (4); In the case of the second distribution state, the projections of the first electrode (31) and the second electrode (32) on the heating layer (4) along the third direction are contained within the heating layer (4).

3. The irregular heating pad structure according to claim 2.

4. When the heat generating layer (4) is in the first distribution state, the distance in the second direction between the end of the branch electrode segment (34) and the main electrode segment (33) in the other electrode is smaller than the distance in the second direction between the end of the branch electrode segment (34) and the main electrode segment (33) in the other electrode when the heat generating layer (4) is in the second distribution state.

4. The irregular heating pad structure according to claim 3.

5. When the heat generating layer (4) is in the second distribution state, the distance from the end of the branch electrode segment (34) to the main electrode segment (33) in the other electrode is equal to or greater than the inter-electrode distance of the heat generating electrode pair including the branch electrode segment (34).

4. The irregular heating pad structure according to claim 3.

6. The heat generating layer (4) has a first heat shielding portion (41), When the heat generating layer (4) is in the first distribution state, the first heat shielding portion (41) is an opening structure provided at an edge portion of the heat generating layer (4), and the opening structure opens along the second direction, The heat shield (41) is provided at an end of each of the branch electrode segments (34) remote from the corresponding main electrode segment (33).

5. The irregular heating pad structure according to claim 4.

7. The heat generating layer (4) has a second heat shielding portion (42), When the heat generating layer (4) is in the second distribution state, the second heat shielding portion (42) is an opening structure provided in the heat generating layer (4), There are at least two of the opening structures, and the two opening structures are provided corresponding to the ends of the branch electrode segments (34) of different main electrode segments (33), respectively.

6. The irregular heating pad structure according to claim 5.

8. The external connection circuit includes a conductor (5), There are at least two conductors (5), one end of each of the two conductors (5) is connected to the first electrode (31) and the second electrode (32), and the other end of each of the two conductors (5) is connected to a connector (7), and the connector (7) is for electrically connecting to an automobile control system.

2. The irregular heating pad structure according to claim 1.

9. The first substrate (1) and the second substrate (2) are made of a thin film material or a woven fabric material.

2. The irregular heating pad structure according to claim 1.

10. The material of the heat generating layer (4) is graphene, carbon black or carbon nanotubes.

2. The irregular heating pad structure according to claim 1.

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