Vehicle seat back with heating function

Abstract

The invention relates to a vehicle seat back with a heating function, which comprises a heating assembly, the heating assembly comprises a plurality of graphene sheets, and the plurality of graphene sheets are arranged up and down at intervals and respectively correspond to the head, back and waist and abdomen areas of the seat back; a first heating electrode and a plurality of second heating electrodes, the polarities of the first heating electrode and the second heating electrodes are opposite, the first heating electrode is simultaneously connected with the plurality of graphene sheets, the plurality of second heating electrodes are respectively connected with the graphene sheets corresponding to the head part, the back part and the waist and abdomen part of the chair back, and the plurality of second heating electrodes can be selectively started; the graphene sheets are used for selectively heating the head part, the back part and the waist and abdomen part of the chair back. The air conditioner has the beneficial effects that the problem of non-uniform heat distribution can be solved, and the comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a vehicle seat back with a heating function. Background Art

[0002] To enhance driving comfort, especially in cold conditions, heated car seats have become a mainstream feature. Their core goal is to provide warmth to the occupant's back, alleviating the discomfort of cold. Traditionally, this approach involves embedding a single, continuous heating element within the seatback, covering the entire backrest area. This heating element, controlled by a single circuit, provides a uniform, undivided temperature across the entire backrest area. However, this heating method suffers from uneven heat distribution, leading to localized discomfort.

[0003] Due to the physiological curves of the human back (such as the spinal groove, shoulder blades, and lumbar support area), as well as differences in occupant body shape, sitting posture, and contact pressure with the seat, using a single heating element and providing a uniform heating temperature in the seatback can easily lead to uneven heat distribution across the seatback surface. In areas where the seatback has high contact pressure with the occupant (especially the lumbar support area), heat dissipation is slow and heat easily accumulates, leading to overheating. Meanwhile, in areas where the seatback has low contact pressure and poor fit (such as above the shoulder blades, the spinal groove, and the edge of the shoulder), heat transfer efficiency is low, leading to insufficient heating. This contradictory phenomenon of overheating in the lumbar region and lack of warmth in the shoulders / edges affects the occupant's overall thermal comfort.

[0004] Therefore, in order to improve thermal comfort, there is an urgent need for a vehicle seat back that can achieve zoned heating. Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vehicle seat back with a heating function, which solves the technical problem that when a single heating element is used and a uniform heating temperature is provided, heat is easily unevenly distributed on the seat back surface, affecting thermal comfort.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] An embodiment of the present invention provides a vehicle seat back with a heating function, including a heating assembly, wherein the heating assembly includes:

[0010] A plurality of graphene sheets, the plurality of graphene sheets being arranged in an upper and lower interval and corresponding to the head, back, and waist and abdomen regions of the chair back, respectively;

[0011] A first heating electrode and multiple second heating electrodes, the polarities of the first heating electrode and the second heating electrodes are opposite, the first heating electrode is connected to multiple graphene sheets at the same time, and the multiple second heating electrodes are respectively connected to the graphene sheets corresponding to the head, back and waist of the chair back, and the multiple second heating electrodes can be selectively turned on to selectively heat the graphene sheets at the head, back and waist of the chair back.

[0012] According to the present invention, at least one graphene sheet is correspondingly provided on the head, back, waist and abdomen areas of the chair back;

[0013] When there are multiple graphene sheets arranged in the head, back, waist and abdomen areas of the chair back, the multiple graphene sheets are arranged horizontally and spaced apart.

[0014] According to the present invention, both the first heating electrode and the second heating electrode are copper foils;

[0015] The first heating electrode includes a first main body extending along the height direction of the chair back, and at least one first branch portion extending from the first main body to connect to the corresponding graphene sheet;

[0016] The second heating electrode includes a second main body extending along the height direction of the chair back, and at least one second branch portion extending from the first main body to connect to the corresponding graphene sheet;

[0017] When there are multiple first branch portions and multiple second branch portions connecting the first heating electrode and the second heating electrode on the same graphene sheet, the multiple first branch portions and the multiple second branch portions are arranged in parallel and staggered.

[0018] According to the present invention, the heating assembly further comprises a base layer;

[0019] The graphene sheet, the first heating electrode and the second heating electrode are all arranged on the first side of the base layer, and a plurality of ventilation holes are provided on the base layer;

[0020] The chair back further includes a blowing component; the blowing component can blow air toward the graphene sheet, and the wind flowing through the graphene sheet can be discharged through the ventilation holes.

[0021] According to the present invention, the blowing assembly comprises a blowing duct and a partition;

[0022] The partition layer is located between the blowing duct and the first side of the base layer, and the partition layer is a hollow mesh body;

[0023] The blowing port of the blowing duct is arranged toward the graphene sheet;

[0024] The wind discharged from the air outlet is blown to the graphene sheet through the partition layer, absorbs the heat of the graphene sheet, and is then diffused through the partition layer and discharged from the ventilation hole.

[0025] According to the present invention, the blowing duct is provided with a first blowing port corresponding to the graphene sheet in the back area and a second blowing port corresponding to the graphene sheet in the waist and abdomen area; the first blowing port and the second blowing port can be selectively opened and closed.

[0026] According to the present invention, the barrier layer includes a first barrier layer and a second barrier layer;

[0027] The first interlayer and the second interlayer are arranged in an upper and lower space, the first interlayer is located between the back area of ​​the first side of the base layer and the first air outlet, and the second interlayer is located between the waist and abdomen area of ​​the first side of the base layer and the second air outlet;

[0028] Barrier bars are arranged above the first barrier layer and between the first barrier layer and the second barrier layer.

[0029] According to the present invention, the blowing assembly further comprises a sealing layer;

[0030] The blowing duct is fixed to the first side of the interlayer, and the sealing layer wraps and adheres to the outer wall of the blowing duct and adheres to the first side of the interlayer on all sides;

[0031] A back ventilation space is formed between the back area of ​​the first side of the base layer, the first barrier layer and the sealing layer;

[0032] A waist and abdomen ventilation space is formed between the waist and abdomen area on the first side of the base layer, the second insulating layer and the closed layer.

[0033] According to the present invention, the partition layer is a 3D mesh.

[0034] According to the present invention, the first end of the blowing duct is connected to a fan or a vehicle ventilation system, and the second end of the blowing duct is provided with the blowing port facing one side of the graphene sheet.

[0035] (3) Beneficial effects

[0036] The vehicle seat back with heating function of the present invention has the following beneficial effects:

[0037] Solve the problem of uneven heat distribution: Zoned heating is achieved through independently controlled graphene sheets for the head, back, waist and abdomen, allowing passengers to turn on or off specific areas as needed (such as turning off the waist heating separately), to avoid the problem of overheating of the waist and cold shoulders when a single heating element is set for the entire seat back.

[0038] Improved comfort: Passengers can freely combine and activate the second heating electrodes in different areas according to their own body sensations (such as only waist heating or only back heating is needed), avoiding the problem of insufficient heating caused by being forced to lower the overall heating level due to local overheating, and reducing energy consumption while ensuring comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A front view of a heating assembly for a vehicle seat back with a heating function according to the present invention;

[0040] Figure 2 It is the main view of the heating component;

[0041] Figure 3 It is the main view of the heating component;

[0042] Figure 4 It is the main view of the heating component;

[0043] Figure 5 It is an exploded schematic diagram of the heating component and the blowing component;

[0044] Figure 6 for Figure 5 Rear view;

[0045] Figure 7 It is a schematic diagram of the assembly of the heating component and the blowing component;

[0046] Figure 8 for Figure 7 Rear view;

[0047] Figure 9 Schematic diagram of the first and second partitions;

[0048] Figure 10 for Figure 7 Side sectional view (the on / off switch is in the on state);

[0049] Figure 11 for Figure 10 A magnified view of point A in the figure;

[0050] Figure 12 for Figure 7 Side sectional view (the on / off switch is in the closed state);

[0051] Figure 13 for Figure 12 Enlarged view of point B.

[0052] [Description of Reference Numerals]

[0053] 1: Heating element; 11: Graphene sheet; 12: First heating electrode; 121: First main body; 122: First branch; 13: Second heating electrode; 131: Second main body; 132: Second branch; 14: Base layer; 141: Ventilation hole;

[0054] 2: Blowing assembly; 21: Blowing duct; 211: Main pipe; 212: Branch pipe; 2121: First blowing port; 2122: Second blowing port; 22: Partition; 221: First partition; 222: Second partition; 23: Blocking strip; 24: Enclosed layer; 25: Fan; 26: Flip plate. DETAILED DESCRIPTION

[0055] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 1 The orientation is referenced.

[0056] See also Figure 1-4 The vehicle seat back with heating function proposed in an embodiment of the present invention includes a heating assembly 1 for heating the seat back. The heating assembly 1 is located within the seat back cover. The heating assembly 1 includes multiple graphene sheets 11, a first heating electrode 12, and multiple second heating electrodes 13.

[0057] Multiple graphene sheets 11 are spaced apart vertically and correspond to the head, back, and waist regions of the chair back, respectively. The first heating electrode 12 and the second heating electrode 13 have opposite polarities. The first heating electrode 12 is simultaneously connected to the multiple graphene sheets 11, while the multiple second heating electrodes 13 are individually connected to the graphene sheets 11 corresponding to the head, back, and waist regions of the chair back. The second heating electrodes 13, each connected to the graphene sheets 11 at the head, back, and waist regions of the chair back, can be selectively turned on. When the second heating electrodes 13 are turned on, they form a continuous circuit with the first heating electrode 12 to selectively heat the graphene sheets 11 at the head, back, and waist regions of the chair back, achieving zoned heating of the head, back, and waist regions of the chair back.

[0058] Therefore, the vehicle seat back with heating function can achieve the following effects:

[0059] Solve the problem of uneven heat distribution: Through the independently controlled graphene sheet 11 zone heating of the head, back, waist and abdomen, the occupants can turn on or off specific areas as needed (such as turning off the waist heating separately), so as to avoid the problem of overheating of the waist and cold shoulders when a single heating element is set on the entire seat back.

[0060] Improve comfort: Occupants can freely combine and activate the second heating electrodes 13 in different areas according to their own body sensations (e.g., only waist heating or only back heating is needed), avoiding the problem of insufficient heating caused by being forced to lower the overall heating level due to local overheating, and reducing energy consumption while ensuring comfort.

[0061] See also Figure 2 and Figure 3 Furthermore, at least one graphene sheet 11 is correspondingly provided in the head, back, waist and abdomen areas of the chair back.

[0062] When there are multiple graphene sheets 11 provided in the head, back, waist and abdomen areas of the chair back, the multiple graphene sheets 11 are horizontally spaced apart to expand the heating area of ​​the chair back.

[0063] Furthermore, the first heating electrode 12 and the second heating electrode 13 are both copper foils.

[0064] See also Figure 4 The first heating electrode 12 includes a first main body 121 extending along the height direction of the chair back, and at least one first branch portion 122 extending from the first main body 121 to connect to the corresponding graphene sheet 11.

[0065] The second heating electrode 13 includes a second main body 131 extending along the height direction of the chair back, and at least one second branch portion 132 extending from the first main body 121 to connect to the corresponding graphene sheet 11 .

[0066] Optionally, the first branch portion 122 and the second branch portion 132 are both extended along the length direction or the width direction of the graphene sheet 11 to facilitate assembly.

[0067] Specifically, the first heating electrode 12 and the second heating electrode 13 are both applied on the graphene sheet 11 through silver paste.

[0068] Preferably, there are multiple first branches 122 and second branches 132 connecting the first heating electrode 12 and the second heating electrode 13 on the same graphene sheet 11, and the multiple first branches 122 and the multiple second branches 132 are arranged in parallel and staggered to increase the contact area and distribution uniformity between the first heating electrode 12 and the second heating electrode 13 and the graphene sheet 11, thereby improving the heating uniformity and heating efficiency of the graphene sheet 11.

[0069] Furthermore, the heating component 1 further includes a base layer 14 .

[0070] The graphene sheet 11 , the first heating electrode 12 and the second heating electrode 13 are all disposed on a first side of the base layer 14 , and the base layer 14 supports the graphene sheet 11 , the first heating electrode 12 and the second heating electrode 13 .

[0071] Preferably, the graphene sheet 11 , the first heating electrode 12 and the second heating electrode 13 are all bonded to the base layer 14 .

[0072] See also Figure 5-8 Furthermore, in order to improve the comfort of the passengers when sitting in the seat, a plurality of ventilation holes 141 connected to the seat back cover are opened on the base layer 14, and a blowing component 2 is set in the seat back cover. The blowing component 2 can blow air to the graphene sheet 11, and the wind flowing through the graphene sheet 11 can be discharged through the ventilation holes 141.

[0073] In winter or when the temperature inside the car is low, the graphene sheet 11 is heated by the heating electrode and increases the temperature of the seat back. The wind blown towards the graphene sheet 11 by the blowing component 2 can absorb the heat of the graphene sheet 11 and be discharged through the ventilation hole 141 to help blow hot air to the passengers.

[0074] In summer or when the temperature inside the car is high, the graphene sheet 11 is not heated by the heating electrode, but will absorb the temperature of the seat back and heat up. The wind blown towards the graphene sheet 11 by the blowing component 2 can absorb the heat of the graphene sheet 11 and be discharged through the ventilation hole 141 to reduce the heat of the graphene sheet 11 and thereby reduce the temperature of the seat back.

[0075] Furthermore, the blowing assembly 2 includes a blowing duct 21 and a partition 22 .

[0076] The partition layer 22 is located between the blowing duct 21 and the first side of the base layer 14. The partition layer 22 is a hollow mesh. The blowing port of the blowing duct 21 is arranged toward the graphene sheet 11.

[0077] In winter or when the temperature inside the car is low, the graphene sheet 11 is heated by the heating electrode, and the wind discharged from the air outlet is blown to the graphene sheet 11 through the partition layer 22, and absorbs the heat of the graphene sheet 11 and then diffuses through the partition layer 22 to be discharged from the ventilation hole 141.

[0078] In summer or when the temperature inside the car is high, the graphene sheet 11 is not heated by the heating electrode but absorbs the temperature of the seat back and heats up. The wind discharged from the air outlet blows to the graphene sheet 11 through the partition 22, absorbs the heat of the graphene sheet 11, and then diffuses through the partition 22 and is discharged from the ventilation hole 141.

[0079] It should be noted that in winter or when the temperature inside the vehicle is low, when the graphene sheet 11 is heated and hot air needs to be exhausted, the exhaust flow rate of the air outlet can be reduced so that the air discharged from the air outlet blows at a lower speed to the graphene sheet 11, fully absorbing the heat of the graphene sheet 11 and forming hot air, which is then exhausted through the vents 141. In summer or when the temperature inside the vehicle is high, the seat back absorbs the ambient temperature and heats up. Since the graphene sheet 11 has good thermal conductivity and can absorb the heat of the seat back and heat up, the air outlet of the air duct 21 can be opened and the exhaust flow rate of the air outlet can be increased so that the exhausted air can blow at a higher speed to the graphene sheet 11, remove the heat of the graphene sheet 11 and reduce the temperature of the seat back, and then be exhausted through the vents 141 through diffusion through the interlayer 22.

[0080] Specifically, the partition layer 22 is a 3D mesh to diffuse wind in all directions.

[0081] Furthermore, ventilation holes 141 are arranged on the base layer 14 corresponding to the back and waist regions of the chair back. The air duct 21 defines a first air outlet 2121 corresponding to the back region of the graphene sheet 11 and a second air outlet 2122 corresponding to the waist region of the graphene sheet 11. Both the first air outlet 2121 and the second air outlet 2122 can be selectively opened and closed.

[0082] During use, in winter or when the temperature inside the car is low, the first air outlet 2121 and the second air outlet 2122 can be opened accordingly in conjunction with the zoned heating graphene sheet 11, so as to heat the seat back in different zones and blow hot air in different zones to meet the passenger's needs for hot air blowing on different parts of the seat back.

[0083] In summer or when the temperature inside the car is high, the first air outlet 2121 and the second air outlet 2122 can be opened in sections to blow air to the seat back in sections to meet the cooling needs of different parts of the seat back.

[0084] Specifically, see Figure 1 When a graphene sheet 11 is provided on the base layer 14 corresponding to the back and waist of the chair back, a through hole for connecting the ventilation hole 141 is drilled on the graphene sheet 11.

[0085] See also Figure 2-4 When a plurality of graphene sheets 11 are provided on the base layer 14 corresponding to the back and waist of the chair back, the plurality of graphene sheets 11 are arranged horizontally at intervals and avoid the ventilation holes 141 on the base layer 14 .

[0086] Specifically, the blowing duct 21 includes a main pipe 211 and multiple branch pipes 212 connected to the main pipe 211. The multiple branch pipes 212 and the multiple graphene sheets 11 corresponding to the back and waist and abdomen areas of the chair back are arranged in a one-to-one correspondence. The branch pipe 212 corresponding to the graphene sheet 11 in the back area of ​​the chair back opens a first blowing port 2121, and the branch pipe 212 corresponding to the graphene sheet 11 in the waist and abdomen area opens a second blowing port 2122. Each branch pipe 212 is provided with an opening and closing switch, and the opening and closing of each branch pipe 212 is controlled separately, and the separate opening and closing of the first blowing port 2121 and the second blowing port 2122 are realized, thereby realizing the requirement of partitioned blowing in the back area and waist and abdomen area of ​​the chair back.

[0087] Optionally, the on-off switch is a valve; or, see Figure 10-13 The on-off switch includes a flip plate 26 and a motor.

[0088] When the on-off switch includes a flip plate 26 and a motor, the flip plate 26 is disposed within the air inlet end of the branch pipe 212, the motor body is fixed to the branch pipe 212, and the motor drive end is connected to the flip plate 26 and is capable of driving the flip plate 26 to rotate about a horizontal axis: when the flip plate 26 is flipped to be parallel to the radial direction of the branch pipe 212, the branch pipe 212 can be closed. When the flip plate 26 is flipped to be inclined to the radial direction of the branch pipe 212, the branch pipe 212 can be opened.

[0089] Specifically, the vehicle seat back with heating function further includes a controller connected to the on / off switch, and the controller is used to adjust the on / off state of the on / off switch and the exhaust flow rate.

[0090] Among them, when the opening and closing switch includes a flip plate 26 and a motor, the controller is connected to the motor and drives the flip plate 26 to flip through the motor, adjusting the angle of the flip plate 26 tilted to the cross section of the branch pipe 212, thereby adjusting the exhaust flow.

[0091] See also Figure 9 Specifically, the partition layer 22 includes a first partition layer 221 and a second partition layer 222 .

[0092] The first partition layer 221 and the second partition layer 222 are arranged at intervals up and down, the first partition layer 221 is located between the back area of ​​the first side of the base layer 14 and the first blowing port 2121, and the second partition layer 222 is located between the waist and abdomen area of ​​the first side of the base layer 14 and the second blowing port 2122.

[0093] Blocking strips 23 are provided above the first partition layer 221 and between the first partition layer 221 and the second partition layer 222 to divide the back area and waist and abdomen area on the first side of the base layer 14 into two independent ventilation spaces, so as to better cooperate with the first blowing port 2121 and the second blowing port 2122 to achieve partitioned blowing of the back and waist and abdomen areas of the chair back.

[0094] The first partition layer 221 and the second partition layer 222 are both enclosed in the seat back cover, and both sides of the first partition layer 221 and the bottom and both sides of the second partition layer 222 are blocked by the cover and cannot be exhausted to the outside.

[0095] The air blown out of the first air outlet 2121 can be blocked by the blocking bar 23 located above the first partition layer 221 and the blocking bar 23 located between the first partition layer 221 and the second partition layer 222, and can only flow within the first partition layer 221. The air blown out of the second air outlet 2122 can be blocked by the blocking bar 23 located between the first partition layer 221 and the second partition layer 222, and can only flow within the second partition layer 222.

[0096] See also Figure 5-8 More specifically, the blowing assembly 2 further includes a sealing layer 24 .

[0097] The blowing duct 21 is fixed to the first side of the partition layer 22 , and the sealing layer 24 wraps and adheres to the outer wall of the blowing duct 21 and adheres to the first side of the partition layer 22 on all sides.

[0098] A back ventilation space is formed between the back area of ​​the first side of the base layer 14, the first partition layer 221 and the sealing layer 24, so that the wind blown out of the first blowing port 2121 can only flow in the back ventilation space.

[0099] A waist and abdomen ventilation space is formed between the waist and abdomen area on the first side of the base layer 14, the second partition layer 222 and the sealing layer 24, so that the air blown out from the second air outlet 2122 can only flow in the waist and abdomen ventilation space.

[0100] Optionally, the sealing layer 24 is made of plastic.

[0101] Optionally, the second side of the partition 22 and the blocking strip 23 are both adhered to the base layer 14, the blowing duct 21 is adhered to the first side of the partition 22, and the sealing layer 24 is adhered to the outer wall of the blowing duct 21 and is adhered to the first side of the partition 22 and the base layer 14 on all sides.

[0102] Furthermore, a first end of the blowing duct 21 is connected to the fan 25 or the vehicle ventilation system, and a second end of the blowing duct 21 is provided with a blowing port facing one side of the graphene sheet 11 .

[0103] Optionally, the main pipe 211 is a hose.

[0104] The first ends of the main pipes 211 are connected to the fans 25 or the vehicle ventilation system, and the second ends are connected to the plurality of branch pipes 212 .

[0105] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0106] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0107] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A vehicle seat back with a heating function, characterized in that: The invention comprises a heating component (1), wherein the heating component (1) comprises: A plurality of graphene sheets (11), wherein the plurality of graphene sheets (11) are arranged at intervals in the upper and lower parts and correspond to the head, back, waist and abdomen areas of the chair back, respectively; A first heating electrode (12) and a plurality of second heating electrodes (13), wherein the polarities of the first heating electrode (12) and the second heating electrode (13) are opposite, the first heating electrode (12) is simultaneously connected to the plurality of graphene sheets (11), the plurality of second heating electrodes (13) are respectively connected to the graphene sheets (11) corresponding to the head, back, waist and abdomen of the chair back, and the plurality of second heating electrodes (13) can be selectively turned on to selectively heat the graphene sheets (11) at the head, back, waist and abdomen of the chair back.

2. The vehicle seat back with heating function according to claim 1, characterized in that: At least one graphene sheet (11) is correspondingly provided in the head, back, waist and abdomen areas of the chair back; When the number of the graphene sheets (11) provided in the head, back, and waist and abdomen regions of the chair back is plural, the plural graphene sheets (11) are arranged horizontally and spaced apart.

3. The vehicle seat back with heating function according to claim 2, characterized in that: The first heating electrode (12) and the second heating electrode (13) are both copper foils; The first heating electrode (12) comprises a first main body (121) extending along the height direction of the chair back, and at least one first branch portion (122) extending from the first main body (121) to connect to the corresponding graphene sheet (11); The second heating electrode (13) comprises a second main body (131) extending along the height direction of the chair back, and at least one second branch portion (132) extending from the first main body (121) to connect to the corresponding graphene sheet (11); When there are multiple first branch portions (122) and multiple second branch portions (132) connecting the first heating electrode (12) and the second heating electrode (13) on the same graphene sheet (11), the multiple first branch portions (122) and the multiple second branch portions (132) are arranged in parallel and staggered.

4. The vehicle seat back with heating function according to claim 1, characterized in that: The heating assembly (1) further comprises a base layer (14); The graphene sheet (11), the first heating electrode (12), and the second heating electrode (13) are all arranged on a first side of the base layer (14), and a plurality of ventilation holes (141) are provided on the base layer (14); The chair back further comprises a blowing assembly (2); the blowing assembly (2) is capable of blowing air toward the graphene sheet (11), and the air flowing through the graphene sheet (11) can be discharged through the ventilation holes (141).

5. The vehicle seat back with heating function according to claim 4, characterized in that: The blowing assembly (2) comprises a blowing duct (21) and a partition (22); The partition layer (22) is located between the blowing duct (21) and the first side of the base layer (14), and the partition layer (22) is a hollow mesh body; The blowing port of the blowing duct (21) is arranged toward the graphene sheet (11); The wind discharged from the air outlet is blown to the graphene sheet (11) through the partition layer (22), absorbs the heat of the graphene sheet (11), and is then diffused through the partition layer (22) and discharged from the ventilation hole (141).

6. The vehicle seat back with heating function according to claim 5, characterized in that: The blowing duct (21) is provided with a first blowing port (2121) corresponding to the graphene sheet (11) in the back region and a second blowing port (2122) corresponding to the graphene sheet (11) in the waist and abdomen region; the first blowing port (2121) and the second blowing port (2122) can both be selectively opened and closed.

7. The vehicle seat back with heating function according to claim 6, characterized in that: The partition layer (22) includes a first partition layer (221) and a second partition layer (222); The first partition layer (221) and the second partition layer (222) are arranged in an upper and lower spaced relationship, the first partition layer (221) is located between the back area of ​​the first side of the base layer (14) and the first air blowing port (2121), and the second partition layer (222) is located between the waist and abdomen area of ​​the first side of the base layer (14) and the second air blowing port (2122); Blocking strips (23) are provided above the first barrier layer (221) and between the first barrier layer (221) and the second barrier layer (222).

8. The vehicle seat back with heating function according to claim 7, characterized in that: The blowing assembly (2) further includes a sealing layer (24); The blowing duct (21) is fixed to the first side of the partition (22), and the sealing layer (24) wraps and adheres to the outer wall of the blowing duct (21) and adheres to the first side of the partition (22) on all sides; A back ventilation space is formed between the back area of ​​the first side of the base layer (14), the first barrier layer (221) and the sealing layer (24); A waist and abdomen ventilation space is formed between the waist and abdomen area on the first side of the base layer (14), the second isolation layer (222) and the closed layer (24).

9. The vehicle seat back with heating function according to claim 5, characterized in that: The partition layer (22) is a 3D mesh.

10. The vehicle seat back with heating function according to claim 5, characterized in that: The first end of the blowing duct (21) is connected to a fan (25) or a vehicle ventilation system, and the second end of the blowing duct (21) is provided with the blowing port on one side facing the graphene sheet (11).

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