Graphene heating body and electric appliance

Abstract

The invention discloses a graphene heating element and an electric appliance, the graphene heating element comprises a graphene heating element, the graphene heating element is used for heating after being electrified, the graphene heating element comprises a bent air guide part, and the air guide part is used for guiding airflow to flow according to a preset path so as to change the flowing direction of the airflow. According to the technical scheme, the air guiding function can be achieved so as to change the air outlet direction of airflow, and the heating efficiency of the airflow can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphene heating, and particularly relates to a graphene heating element and an electrical appliance. Background Art

[0002] In the related art, a graphene heating element generally includes a graphene heating component that generates heat after being powered on. However, in a traditional graphene heating component, graphene is generally sprayed on a heat sink, and the heat sink is generally designed as a straight sheet to increase the heat dissipation area. When air flows through the graphene heating element, the air goes straight in and out, and the flow direction of the air cannot be changed. Moreover, the air flow speed is too fast to conduct sufficient heat exchange with the graphene heating component, resulting in a low heating efficiency of the graphene heating element for the air flow. Summary of the Invention

[0003] The main object of the present invention is to propose a graphene heating element, aiming to be able to achieve a wind guiding function to change the flow direction of the air flow and improve the heating efficiency for the air flow.

[0004] To achieve the above object, the graphene heating element proposed by the present invention includes:

[0005] A graphene heating component, which is used to generate heat after being powered on. The graphene heating component includes a bent air guiding part, and the air guiding part is used to guide the air flow to flow along a preset path to change the flow direction of the air flow.

[0006] In one embodiment, the air guiding part is arranged in an arc-shaped plate shape, and the bending direction of the air guiding part is the same as the flow direction of the air flow.

[0007] In one embodiment, the graphene heating element has an air inlet side and an air outlet side, and the included angle between the air inlet direction of the air inlet side and the air outlet direction of the air outlet side is A, where 90° ≤ A ≤ 180°.

[0008] In one embodiment, the graphene heating element further includes two electrode fixing parts arranged at intervals, and the graphene heating component is respectively connected to the two electrode fixing parts and is electrically conductive.

[0009] In one embodiment, the graphene heating component further includes a connecting part connected to the air guiding part. The connecting part is arranged near the air inlet side of the graphene heating element. The two opposite sides of the connecting part in the first direction are respectively connected to the two electrode fixing parts one by one and are electrically conductive, and the first direction intersects with the air inlet direction of the air inlet side.

[0010] In one embodiment, the electrode fixing part includes a fixing part and a wiring terminal connected to each other. A clamping groove is provided on the side of the fixing part facing away from the wiring terminal, and the connecting part is fixedly clamped with the clamping groove.

[0011] In one embodiment, the connecting portion is arranged in a flat plate shape, and the surface of the connecting portion is tangent to the surface of the air guiding portion.

[0012] In one embodiment, the graphene heating element includes:

[0013] A substrate;

[0014] A graphene electrothermal layer provided on one side surface of the substrate;

[0015] An electrode layer provided on the side surface of the graphene electrothermal layer facing away from the substrate. The electrode layer includes a first electrode region and a second electrode region arranged at intervals. The first electrode region is used for electrically connecting to the first pole of the power supply, and the second electrode region is used for electrically connecting to the second pole of the power supply; and

[0016] An insulating layer covering the region of the side surface of the graphene electrothermal layer facing away from the substrate except for the electrode layer.

[0017] In one embodiment, a plurality of the graphene heating elements are arranged at intervals. The plurality of graphene heating elements are electrically connected and arranged in parallel, and an air flow channel is formed between adjacent two of the graphene heating elements.

[0018] In one embodiment, the distance between adjacent two of the graphene heating elements is not less than 5 mm.

[0019] The present invention also provides an electrical appliance including the above-mentioned graphene heating body.

[0020] In one embodiment, the electrical appliance is a heater. The heater includes a housing, and the housing is provided with an air inlet and an air outlet. The graphene heating body is arranged inside the housing.

[0021] In one embodiment, the air inlet side of the graphene heating body is arranged opposite to the air inlet, and the air outlet side of the graphene heating body is arranged opposite to the air outlet;

[0022] And / or, the air inlet is provided on the bottom surface or the side surface of the housing, and the air outlet is provided on the top surface or the side surface of the housing.

[0023] In one embodiment, the housing has adjacent first side surface and second side surface. The air outlet includes a first air outlet provided on the first side surface and a second air outlet provided on the second side surface. The air outlet side of the graphene heating body is communicated with the first air outlet and the second air outlet.

[0024] In one embodiment, the first side face is the top side face of the housing, the second side face extends downward relative to the first side face, and the second air outlet is located on one side of the second side face close to the first side face.

[0025] In one embodiment, the air outlet direction of the air outlet side is inclined relative to the second side face, so that the second air outlet discharges air obliquely;

[0026] And / or, the air inlet is arranged on the bottom side face of the housing, and the air inlet side of the graphene heating element is communicated with the air inlet.

[0027] In one embodiment, the heater further includes a fan arranged in the housing, and the fan is used for driving air flow to flow from the air inlet through the graphene heating element towards the air outlet.

[0028] The technical solution of the present invention is that the graphene heating element includes a bent air guiding part. Through the air guiding part, the air flow can be guided to flow along a preset path. Since the air guiding part is bent, by designing the bending path of the air guiding part, it can be realized that the air flow bends and flows from the air inlet side towards the air outlet side, and further, the flow direction of the air flow can be changed, so that the air inlet direction and the air outlet direction of the air flow form a certain included angle. And the air guiding part is bent, which can also extend the path of the air flow flowing along the air guiding part as much as possible in a limited space, so that the air flow can fully contact the surface of the graphene heating element for heat exchange, thereby improving the heating efficiency of the graphene heating element for the air flow. In addition, the air guiding part is bent, which can also play a certain role in strengthening the structure of the graphene heating element, and further improve the structural strength and anti-bending deformation ability of the graphene heating element. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of the graphene heating element of the present invention;

[0031] Figure 2 is Figure 1 the bottom view of the graphene heating element in

[0032] Figure 3 is Figure 1 the side view of the graphene heating element in

[0033] Figure 4 Structural schematic diagram of another embodiment of the graphene heating element of the present invention;

[0034] Figure 5 is Figure 4 side view of the graphene heating element in;

[0035] Figure 6 Structural schematic diagram of yet another embodiment of the graphene heating element of the present invention;

[0036] Figure 7 Cross-sectional structural schematic diagram of the graphene heating element of the graphene heating element;

[0037] Figure 8 Structural schematic diagram of an embodiment of an electrical appliance of the present invention;

[0038] Figure 9 is Figure 8 Cross-sectional structural schematic diagram of the electrical appliance in.

[0039] Explanation of the reference numerals in the drawings:

[0040] Reference numeral Name Reference numeral Name 100 Graphene heating element 211 Base material 10 Electrode fixing part 212 Graphene electrothermal layer 11 Fixing part 213 Electrode layer 111 Card slot 213a First electrode area 112 Guide inclined plane 213b Second electrode area 12 Terminal 214 Insulating layer 20 Graphene heating element 101 Inlet side 21 Air guiding part 102 Outlet side 22 Connecting part 103 Air flow channel 1000 Electrical appliance 300 Fan 200 Housing 202a First air outlet 201 Air inlet 202b Second air outlet 202 Air outlet 220 Second side 210 First side

[0041] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides a graphene heating element 100.

[0046] Please refer to Figures 1 to 3 , in an embodiment of the present invention, the graphene heating element 100 includes a graphene heating element 20. The graphene heating element 20 is used to generate heat after being energized. The graphene heating element 20 includes a bent air guiding portion 21, and the air guiding portion 21 is used to guide the air flow to flow along a preset path to change the flow direction of the air flow.

[0047] In practical applications, the graphene heating element 100 can be used to generate heat after being energized to heat the air flow. Taking the application of the graphene heating element 100 in a heater as an example, the heater includes a housing and the graphene heating element 100. The housing has an air inlet, an air outlet, and an air duct connecting the air inlet and the air outlet. The graphene heating element 100 is disposed in the air duct. After the graphene heating element 100 is energized, it generates heat. External air enters the air duct through the air inlet, flows through the graphene heating element 100, and the heat radiated by the graphene heating element 100 can heat the air flow. The heated air flow is blown out from the air outlet. However, traditional graphene heating elements are generally designed as straight sheets, and the air flow passes through the graphene heating element in a straight-in and straight-out manner, and the air outlet direction cannot be changed. Moreover, the air flow velocity is too fast to conduct sufficient heat exchange with the graphene heating element, resulting in a low heating efficiency of the graphene heating element for the air flow.

[0048] Please combine Figure 1 and Figure 3In order to change the airflow outlet direction and improve the heating efficiency of the graphene heating element 100 on the airflow, in this embodiment, the graphene heating element 20 includes a curved air guide 21, through which the airflow can be guided to flow along a preset path to change the flow direction of the airflow. The main purpose of changing the flow direction of the airflow is to change the direction relative to the air intake, that is, to change the air outlet direction. For example, the airflow inside a convection heater generally flows from bottom to top to achieve top outlet. The arc-shaped air guide 21 can change the flow direction of the airflow so that the airflow flows from bottom to top to a certain position and then outlets from the side. For example, the airflow can be guided by the air guide 21 to flow from the air inlet side 101 of the graphene heating element 100 toward the air outlet side 102. Since the air guide 21 is arranged in a curved shape, the curved path of the air guide 21 can be designed to realize the curved flow of the airflow from the air inlet side 101 toward the air outlet side 102, and then the air outlet direction of the airflow can be changed so that the air inlet direction and the air outlet direction of the airflow are arranged at a certain angle. In addition, the air guide 21 is arranged in a curved shape, and the path of the airflow flowing along the air guide 21 can be extended as much as possible within a limited space, so that the airflow can fully contact the surface of the graphene heating element 20 for heat exchange, thereby improving the heating efficiency of the graphene heating element 100 for the airflow. In addition, the air guide 21 is arranged in a curved shape, which can also play a certain structural reinforcement role on the graphene heating element 20, thereby improving the structural strength and anti-bending deformation ability of the graphene heating element 100. Among them, the air guide portion 21 can be designed to be arc-shaped, spiral-shaped, "U"-shaped, "V"-shaped, "匚"-shaped, "S"-shaped or other special-shaped curved structures according to actual needs, and no specific limitation is made here.

[0049] In order to guide the airflow well, Figure 1 and Figure 3 As shown, in one embodiment, the air guide portion 21 is arranged in an arc-shaped plate shape, and the bending direction of the air guide portion 21 is consistent with the flow direction of the airflow. By setting the air guide portion 21 in an arc-shaped plate shape, the structure is simple and easy to process and shape. At the same time, the arc-shaped plate structure can form a large contact area with the airflow, realize sufficient contact heat exchange, and improve the heating efficiency of the airflow. In addition, the bending direction of the air guide portion 21 is consistent with the flow direction of the airflow, and the arc surface of the air guide portion 21 can play a good guiding role for the airflow, which is conducive to the airflow to adhere to the arc surface of the air guide portion 21 and flow toward the air outlet side 102 of the graphene heating element 100.

[0050] like Figure 3 and Figure 5 As shown, in one embodiment, the graphene heating element 100 has an air inlet side 101 and an air outlet side 102, and the angle between the air inlet direction of the air inlet side 101 and the air outlet direction of the air outlet side 102 is A, wherein 90°≤A≤180°.

[0051] It can be understood that if the included angle A is less than 90°, the air outlet direction of the air outlet side 102 is set at an acute angle with the air inlet direction of the air inlet side 101 (that is, the air outlet direction is skewed towards the air inlet direction side). For example, Figure 6 as shown, in one embodiment, the included angle A between the air outlet direction of the air outlet side 102 and the air inlet direction of the air inlet side 101 is less than 90° (exemplarily, A is 79°), then there will be an inflection point (i.e., the highest point) at the top of the arc-shaped graphene heating element 100. If there is no wind, heat will accumulate at the inflection point, causing the temperature at the inflection point to be too high and thus burning out the heating element. In this embodiment, 90° ≤ A ≤ 180°. At this time, the air flow on the air outlet side 102 can be sent horizontally or obliquely away from the air inlet side 101. In this way, heat accumulation at the inflection point can be avoided, and better heat dissipation effects can be achieved, and the use safety can be improved. To ensure better air guiding and heat dissipation effects, optionally, 90° ≤ A ≤ 135°

[0052] In one embodiment, the graphene heating element 100 further includes two electrode fixing members 10 arranged at intervals, and the graphene heating elements 20 are respectively connected to and electrically conductive with the two electrode fixing members 10.

[0053] Specifically, the electrode fixing member 10 is made of a conductive material, such as copper, aluminum, or an alloy material with good electrical conductivity. The electrode fixing member 10 is connected to and electrically conductive with the graphene heating element 20. The connection and fixation between the electrode fixing member 10 and the graphene heating element 20 include but are not limited to methods such as clamping, welding, riveting, or screw connection, and are not specifically limited here. The graphene heating elements 20 are respectively connected to and electrically conductive with the two electrode fixing members 10. The graphene heating element 20 can be supported by the two electrode fixing members 10. During use, one of the electrode fixing members 10 is electrically connected to the positive electrode of the power supply, and the other electrode fixing member 10 is electrically connected to the negative electrode of the power supply, so that the graphene heating element 20 can be connected to the power supply circuit, and the graphene heating element 20 generates heat after being powered on. Among them, the number of graphene heating elements 20 can be set to one or more (that is, at least two) according to actual needs, and is not specifically limited here. For example, as Figure 1 shown, a plurality of graphene heating elements 20 are provided, and the plurality of graphene heating elements 20 are arranged at intervals and are connected in parallel between the two electrode fixing members 10.

[0054] For example, Figure 1As shown, in one embodiment, the graphene heating element 20 further includes a connecting portion 22 connected to the air guiding portion 21. The connecting portion 22 is disposed near the air inlet side 101 of the graphene heating body 100. Opposite sides of the connecting portion 22 in the first direction are respectively connected to and electrically connected to the two electrode fixing members 10 one by one, and the first direction intersects with the air inlet direction of the air inlet side 101.

[0055] In this embodiment, the graphene heating element 20 includes an air guiding portion 21 and a connecting portion 22. The connecting portion 22 facilitates the connection and electrical conduction with the electrode fixing member 10. Among them, the connection between the connecting portion 22 and the electrode fixing member 10 includes, but is not limited to, connection and fixation by means such as snap connection, welding, riveting, and screw connection. And the connecting portion 22 is disposed on one side of the air guiding portion 21 close to the air inlet side 101. The air flow on the air inlet side 101 flows along the connecting portion 22 to the air guiding portion 21, and then is guided by the air guiding portion 21 to the air outlet side 102. In this way, it is beneficial to extend the size of the graphene heating element 20 in the air flow path, so that the air flow can fully contact the graphene heating element 20 for heat exchange and improve the heating efficiency. The two electrode fixing members 10 are respectively connected to opposite sides of the connecting portion 22 in the first direction. Since the first direction intersects with the air inlet direction of the air inlet side 101, specifically, it can be perpendicular intersection or intersection with a certain inclination angle. In this way, the electrode fixing member 10 can be reduced to block the air flow on the air inlet side 101, so as to ensure that the air flow on the air inlet side 101 flows more smoothly.

[0056] For the convenience of assembling the graphene heating element 20 with the electrode fixing member 10 and connecting the electrode fixing member 10 to the power supply, as Figure 2 As shown, in one embodiment, the electrode fixing member 10 includes a fixing portion 11 and a wiring terminal 12 connected to each other. A card slot 111 is provided on a side of the fixing portion 11 facing away from the wiring terminal 12, and the connecting portion 22 is fixedly connected to the card slot 111 by snap connection. The fixing portion 11 of the electrode fixing member 10 is snap-fitted with the connecting portion 22 of the graphene heating element 20, and the assembly is simple and convenient. Through the wiring terminal 12, it is very convenient to connect to the power supply to connect the graphene heating body 100 to the power supply circuit. Optionally, the card slot 111 has a socket penetrating through the side of the fixing portion 11 facing away from the wiring terminal 12. The connecting portion 22 of the graphene heating element 20 is inserted into the card slot 111 from the socket, and the card slot 111 and the connecting portion 22 form a tight fit. Optionally, a guiding inclined surface 112 is provided on the inner wall surface of the socket, and the guiding inclined surface 112 is used to guide the connecting portion 22 to be inserted into the card slot 111 from the socket, further improving the assembly convenience.

[0057] As Figure 3As shown, in one embodiment, the connecting portion 22 is arranged in a flat plate shape, and the surface of the connecting portion 22 is tangent to the surface of the air guiding portion 21. In this embodiment, the flat plate shape of the connecting portion 22 facilitates connection and fixation with the electrode fixing member 10. For example, when the electrode fixing member 10 is provided with a card slot 111, the flat plate-shaped connecting portion 22 can be easily inserted into the card slot 111. Considering that the air guiding portion 21 is arranged in a curved shape, in order to ensure that the air flow can flow more smoothly from the connecting portion 22 to the air guiding portion 21, the surface of the connecting portion 22 is tangent to the surface of the air guiding portion 21, so that the connecting portion 22 and the air guiding portion 21 are smoothly and transitionally connected.

[0058] As Figure 4 shown, in one embodiment, the graphene heating element 20 includes a base material 211, a graphene electrothermal layer 212, an electrode layer 213, and an insulating layer 214. The graphene electrothermal layer 212 is disposed on one side surface of the base material 211; the electrode layer 213 is disposed on the side surface of the graphene electrothermal layer 212 facing away from the base material 211. The electrode layer 213 includes a first electrode region 213a and a second electrode region 213b which are spaced apart. The first electrode region 213a is used for electrical connection with the first pole of the power supply, and the second electrode region 213b is used for electrical connection with the second pole of the power supply; the insulating layer 214 covers the region of the side surface of the graphene electrothermal layer 212 facing away from the base material 211 except the electrode layer 213.

[0059] Specifically, the base material 211 is used to form the main support structure of the graphene heating element 20. It can be understood that after the graphene heating element 20 is energized and heated, the temperature is relatively high, so the base material 211 is generally a high-temperature resistant base material 211 made of a high-temperature resistant material. Optionally, the base material 211 can be made of mica board. The mica board has excellent high-temperature resistance and insulation properties, and is inexpensive, which is beneficial to reducing costs. The thickness of the mica board used as the base material 211 should not be too thick. Optionally, a mica board with a thickness not greater than 0.5 mm is used as the base material 211, which can effectively prevent the mica board from cracking due to excessive thickness and ensure the structural stability of the graphene heating element 20.

[0060] The graphene electrothermal layer 212 is a graphene film covering structure with a large-area continuous two-dimensional structure formed by graphene through specific technologies. Utilizing the characteristics of high electrical conductivity and rapid heat generation of graphene composites, when an electric current is applied to the electrodes at both ends of the graphite electrothermal layer, the carbon atom groups in the graphene electrothermal layer 212 rub and collide with each other to generate heat energy. The greater the power density of the graphene heating element 20, the higher its operating temperature, the more intense the lattice vibration of the graphene material, the stronger the energy of the far-infrared light waves released, the higher the electro-thermal radiation conversion efficiency, and the higher the energy-saving efficiency of the product. The graphene electrothermal layer 212 can be attached to the surface of the substrate 211 through processes such as printing and inkjet printing. Optionally, the graphene electrothermal layer 212 is a graphene electrothermal coating applied to the surface of the substrate 211.

[0061] The electrode layer 213 is generally made of a conductive material with good electrical conductivity. For example, the electrode layer 213 can be made of silver, copper, aluminum, or conductive paste. The electrode layer 213 can be attached to the surface of the graphene electrothermal layer 212 through processes such as printing and chip mounting. Optionally, the electrode layer 213 is an electrode coating applied to the surface of the graphene electrothermal layer 212. In this way, the electrode layer 213 and the graphene electrothermal coating can be closely connected to form a surface-to-surface contact, which can not only simplify the manufacturing process but also ensure a stable and reliable electrical connection between the two. The electrode layer 213 includes a first electrode region 213a and a second electrode region 213b arranged at intervals. Among them, the first electrode region 213a is used to be electrically connected to the first pole (such as the positive pole) of the power supply, and the second electrode region 213b is used to be electrically connected to the second pole (such as the negative pole) of the power supply. In this way, the graphene electrothermal layer 212 can be electrically connected to the power supply to form a current loop. To facilitate connecting the graphene heating element 100 to the power supply circuit, two electrode fixing members 10 can be provided. The first electrode region 213a is in contact with and electrically conducts with one of the electrode fixing members 10, and the second electrode region 213b is in contact with and electrically conducts with the other electrode fixing member 10.

[0062] The insulating layer 214 can be made of a high-temperature-resistant insulating material. For example, it can be made of materials such as polyvinyl chloride, polytetrafluoroethylene, phenolic resin, and silicone resin. The insulating layer 214 can be an insulating film attached to the surface of the graphene electrothermal layer 212 or an insulating coating applied to the surface of the graphene electrothermal layer 212, etc. The insulating layer 214 covers the region of the surface of the graphene electrothermal layer 212 facing away from the substrate 211 except for the electrode layer 213 to play an insulating and protective role, ensuring the surface insulation of the graphene heating element 20, thereby avoiding the risk of electric leakage and ensuring the use safety of the graphene heating element 20.

[0063] In order to further improve the structural strength and the ability to resist bending deformation of the graphene heating element 20, in some embodiments, the graphene heating element 20 may further include a reinforcing layer, which is provided on the side of the substrate 211 facing away from the graphene electrothermal layer 212, and / or on the side of the insulating layer 214 facing away from the graphene electrothermal layer 212. In this way, without increasing the thickness of the substrate 211 itself, the reinforcing layer can strengthen the structure of the substrate 211 and the entire graphene heating element 20, so that the graphene heating element 20 is not easily bent and deformed, thereby further improving the structural strength and the ability to resist bending deformation of the graphene heating body 100.

[0064] Please refer to Figures 1 to 3 , on the basis of any of the above embodiments, in one embodiment, a plurality of the graphene heating elements 20 are arranged at intervals, and the plurality of graphene heating elements 20 are electrically connected and arranged in parallel, and an air flow channel 103 is formed between two adjacent graphene heating elements 20.

[0065] In this embodiment, the plurality of graphene heating elements 20 are connected in parallel, which can improve the overall heating efficiency of the graphene heating body 100. And when a part of the graphene heating elements 20 is damaged, it will not affect the normal operation of other graphene heating elements 20, thereby extending the service life of the graphene heating body 100. A certain interval is formed between any two adjacent graphene heating elements 20, which is beneficial to dissipate the heat of the graphene heating elements 20, and this interval can also form an air flow channel 103 for air flow to pass through, so as to heat the air flow passing through.

[0066] In one embodiment, the graphene heating body 100 includes two electrode fixing members 10 arranged at intervals in a first direction, and a plurality of graphene heating elements 20 are arranged at intervals in a second direction. The plurality of graphene heating elements 20 are connected in parallel between the two electrode fixing members 10, and the first direction intersects the second direction. Among them, the first direction may specifically be the length direction or the width direction of the graphene heating element 20, and the second direction is the thickness direction of the graphene heating element 20. The cooperation of the two electrode fixing members 10 can simultaneously play a role in structurally supporting the plurality of graphene heating elements 20, and can also electrically connect the plurality of parallel-connected graphene heating elements 20 to a power source.

[0067] Optionally, the distance between any two adjacent graphene heating elements 20 is the same, which is beneficial to achieve uniform heat dissipation. Specifically, as Figure 3As shown, each graphene heating element 20 includes a flat connecting portion 22 and an arc-shaped plate-shaped air guiding portion 21. The connecting portions 22 of multiple graphene heating elements 20 are arranged parallel and spaced along the second direction, and the distance between any two adjacent connecting portions 22 is the same; the air guiding portions 21 of multiple graphene heating elements 20 are arranged at intervals along the radial direction to form concentric arcs, and the distance between any two adjacent air guiding portions 21 is the same.

[0068] The distance between two adjacent graphene heating elements 20 should not be too small. If the distance is too small, it will cause the air flow to not pass smoothly, and the heat cannot be dissipated in time, resulting in local overheating of the graphene heating body 100. In order to ensure that the air flow can pass smoothly through the air flow channel 103 and ensure a good heat dissipation effect, optionally, the distance between two adjacent graphene heating elements 20 is not less than 5 mm.

[0069] The present invention also provides an appliance 1000, which includes a graphene heating body 100. The specific structure of the graphene heating body 100 refers to the above embodiments. Since this appliance 1000 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the appliance 1000 includes, but is not limited to, a heater, a hair dryer or other appliances with a heating function.

[0070] Please refer to Figure 8 and Figure 9 , in one of the embodiments, the appliance 1000 is a heater, the heater includes a housing 200, the housing 200 is provided with an air inlet 201 and an air outlet 202, and the graphene heating body 100 is arranged inside the housing 200.

[0071] Specifically, the shape of the housing 200 can be set as a cuboid, a cylinder or other special-shaped structures according to actual needs, and no specific limitation is made here. Taking this heater as a skirting heater as an example, correspondingly, the housing 200 generally has a skirting structure similar to a rectangle. The housing wall of the housing 200 is provided with an air inlet 201 and an air outlet 202, and a wind channel connecting the air inlet 201 and the air outlet 202 is formed inside the housing 200. The graphene heating element 100 is arranged in the wind channel. Among them, the number of the air inlet 201 and the air outlet 202 can be set as one or more according to actual needs, and no specific limitation is made here. The shapes of the air inlet 201 and the air outlet 202 can be designed as rectangles, circles or other shapes according to needs, and no specific limitation is made here. In order to increase the air inlet area and the air outlet area as much as possible, optionally, both the air inlet 201 and the air outlet 202 are rectangular openings extending along the length direction of the housing 200. The installation positions of the air inlet 201 and the air outlet 202 on the housing 200 can be set according to actual needs, and no specific limitation is made here. Optionally, the air inlet 201 is provided with an air inlet grille, and the air outlet 202 is provided with an air outlet grille. The number of the graphene heating elements 100 can be set as one or more according to actual needs.

[0072] In this embodiment, when the heater works, the graphene heating element 100 is powered on to generate heat. External air enters the housing 200 through the air inlet 201. During the process of flowing through the graphene heating element 100, the heat radiated by the graphene heating element 100 can heat the air flow, and the heated air flow is blown out from the air outlet 202 of the housing 200. The air guiding part 21 of the graphene heating element 20 can guide the air flow to move along a preset path to change the flowing direction of the air flow. In this way, the graphene heating element 100 arranged inside the housing 200 can simultaneously achieve the effects of heating the air flow and guiding the air flow, without the need to additionally arrange a flow guiding mechanism, which can reduce costs and is conducive to the miniaturization of the heater.

[0073] In one embodiment, the air inlet side 101 of the graphene heating element 100 is oppositely arranged to the air inlet 201, and the air outlet side 102 of the graphene heating element 100 is oppositely arranged to the air outlet 202. In this way, the air flow entering from the air inlet 201 can flow more smoothly to the air inlet side 101, and the air flow blown out from the air outlet side 102 can be more smoothly sent out from the air outlet 202.

[0074] In one embodiment, an air inlet 201 is provided on the bottom surface or a side surface of the housing 200, and an air outlet 202 is provided on the top surface or a side surface of the housing 200. For example, the air inlet 201 can be provided only on the bottom surface of the housing 200 to achieve bottom air intake. Or, the air inlet 201 can be provided only on a side surface of the housing 200 to achieve side air intake. Or, the air outlet 202 can be provided only on the top surface of the housing 200 to achieve top air outlet. Or the air outlet 202 can be provided only on a side surface of the housing 200 to achieve side air outlet. It should be noted that the side surface here can be one of the front side surface, the rear side surface, the left side surface or the right side surface.

[0075] As Figure 9 shown, in one embodiment, the housing 200 has adjacent first and second side surfaces 210 and 220, and the air outlet 202 includes a first air outlet 202a provided on the first side surface 210 and a second air outlet 202b provided on the second side surface 220. The air outlet side 102 of the graphene heating element 100 communicates with the first air outlet 202a and the second air outlet 202b.

[0076] In this embodiment, the first side surface 210 and the second side surface 220 are adjacent to each other, so that the first air outlet 202a and the second air outlet 202b can be arranged adjacent to each other, so that the air outlet side 102 of the graphene heating element 100 can face the adjacent position of the first air outlet 202a and the second air outlet 202b, so that the air outlet side 102 of the graphene heating element 100 communicates with the first air outlet 202a and the second air outlet 202b. The warm air heated by the graphene heating element 100 is blown out from the air outlet side 102, and then can be blown out from the first air outlet 202a and the second air outlet 202b, realizing two-way air outlet, with a simple structure and no need to additionally provide a flow guiding mechanism.

[0077] As Figure 9 shown, in one embodiment, the first side surface 210 is the top side surface of the housing 200, the second side surface 220 extends downward relative to the first side surface 210, and the second air outlet 202b is located on the side of the second side surface 220 close to the first side surface 210.

[0078] In this embodiment, the first side surface 210 is the top side surface of the housing 200, and the first air outlet 202a is provided on the first side surface 210, so that the heater can blow air upward from the top, thereby achieving the effect of heating the whole house. The second side surface 220 extends downward relative to the first side surface 210. Among them, the second side surface 220 can be one of the front side surface, the rear side surface, the left side surface or the right side surface of the housing 200. The second air outlet 202b is provided on the second side surface 220, so that the heater can blow air laterally, thereby achieving the effect of directional heating. Optionally, the second side surface 220 is the front side surface of the housing 200, and the second air outlet 202a is provided on the second side surface 220, which can realize front-side air outlet. The second air outlet 202b is located at the top position of the second side surface 220, so that the second air outlet 202b can be as close as possible to the first air outlet 202a, which is beneficial to the air guiding part 21 of the graphene heating element 100 to guide air toward both the first air outlet 202a and the second air outlet 202b at the same time.

[0079] Further, as Figure 9 shown, in one embodiment, the air outlet direction of the air outlet side 102 is inclined relative to the second side surface 220, so that the second air outlet 202b blows air obliquely. By designing the bending angle of the air guiding part 21 of the graphene heating element 100, the air outlet direction of the air outlet side 102 of the graphite tin heating element 100 forms a certain included angle with the second side surface 220. In this way, the airflow blown out from the second air outlet 202b forms a certain inclination angle relative to the second side surface 220, thereby realizing oblique air outlet. By adopting the oblique air outlet method, it is possible to avoid heat accumulation at the bent part of the graphene heating element 100 and improve the use safety. Optionally, the air outlet direction of the air outlet side 102 is inclined relative to the second side surface 220, so that the second air outlet 202b blows air obliquely upward, so that the warm air can be blown obliquely upward to achieve a better heating effect.

[0080] As Figure 9 shown, in one of the embodiments, the air inlet 201 is provided on the bottom side surface of the housing 200, and the air inlet side 101 of the graphene heating element 100 is communicated with the air inlet 201. In this embodiment, the air inlet 201 is provided on the bottom side surface of the housing 200, so that the setting position of the air inlet 201 is relatively low, which is beneficial to heating the air entering through the air inlet 201 by natural convection and then delivering it to the first air outlet 202a and the second air outlet 202b for sending out.

[0081] On the basis of the above embodiments, as Figure 9 shown, in one embodiment, the heater further includes a blower 300 provided in the housing 200, and the blower 300 is used to drive the airflow to flow from the air inlet 201 through the graphene heating element 100 toward the air outlet 202.

[0082] In this embodiment, the blower 300 can be disposed between the air inlet 201 and the graphene heating element 100. By providing the blower 300, the flow rate of the air flow can be increased, so that the warm air flow can be sent out faster, achieving a rapid heating effect and improving the user experience. Moreover, in the above embodiment, when the top side surface (i.e., the first side surface 210) of the housing 200 is provided with a first air outlet 202a and the second side surface 220 of the housing 200 is provided with a second air outlet 202b, since the first side surface 210 and the second side surface 220 are adjacent to each other, in the case where the blower 300 is not turned on, the hot air flow can be blown out from the first air outlet 202a at the top under the action of natural convection, achieving the effect of heating the whole house. When the blower is turned on, under the action of forced convection, the hot air flow can be blown obliquely upward from the second air outlet 202b on the side, achieving the effect of directional heating. And since the air guiding portion 21 of the graphene heating element 100 is curved (such as arc-shaped), it can play a role in guiding the air flow. Thus, there is no need to additionally provide a flow guiding mechanism, and the structure is simpler and the cost is lower compared with other heaters with dual air outlets.

[0083] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A graphene heating element, characterized in that, Comprising: A graphene heating element, which is used to generate heat after being powered on. The graphene heating element includes a bent air guiding portion, and the air guiding portion is used to guide the air flow to flow along a preset path to change the flow direction of the air flow.

2. The graphene heating element according to claim 1, characterized in that, The air guiding portion is arranged in an arc-shaped plate shape, and the bending direction of the air guiding portion is the same as the flow direction of the air flow.

3. The graphene heating element according to claim 1, wherein The graphene heating body has an air inlet side and an air outlet side, and the included angle between the air inlet direction of the air inlet side and the air outlet direction of the air outlet side is A, where 90° ≤ A ≤ 180°.

4. The graphene heating element according to claim 1, characterized in that, It further includes two electrode fixing members arranged at intervals, and the graphene heating element is respectively connected to the two electrode fixing members and is electrically conductive.

5. The graphene heating element according to claim 4, characterized in that, The graphene heating element further includes a connecting portion connected to the air guiding portion. The connecting portion is arranged near the air inlet side of the graphene heating body. The relative two sides of the connecting portion in the first direction are respectively connected to the two electrode fixing members one-to-one and are electrically conductive, and the first direction intersects with the air inlet direction of the air inlet side.

6. The graphene heating element according to claim 5, wherein The electrode fixing member includes a fixing portion and a wiring terminal connected to each other. A card slot is provided on the side of the fixing portion facing away from the wiring terminal, and the connecting portion is fixedly connected to the card slot by clamping.

7. The graphene heating element according to claim 5, characterized in that, The connecting portion is arranged in a flat plate shape, and the surface of the connecting portion is tangent to the surface of the air guiding portion.

8. The graphene heating element according to claim 1, characterized in that, The graphene heating element includes: A substrate; A graphene electrothermal layer provided on one side surface of the substrate; An electrode layer provided on the side surface of the graphene electrothermal layer facing away from the substrate. The electrode layer includes a first electrode region and a second electrode region arranged at intervals. The first electrode region is used to be electrically connected to the first pole of the power supply, and the second electrode region is used to be electrically connected to the second pole of the power supply; and An insulating layer covering the region of the side surface of the graphene electrothermal layer facing away from the substrate except the electrode layer.

9. The graphene heating element according to any one of claims 1 to 8, characterized in that, A plurality of the graphene heating elements are arranged at intervals. The plurality of graphene heating elements are electrically connected and arranged in parallel, and an air flow channel is formed between adjacent two of the graphene heating elements.

10. The graphene heating element according to claim 9, characterized in that, The distance between adjacent two of the graphene heating elements is not less than 5 mm.

11. An electrical appliance, characterized in that, Comprising the graphene heating body according to any one of claims 1 to 10.

12. The electrical appliance according to claim 11, characterized in that, The electrical appliance is a heater. The heater includes a housing, and the housing is provided with an air inlet and an air outlet, and the graphene heating body is arranged in the housing.

13. The electrical appliance according to claim 12, wherein, The air inlet side of the graphene heating body is arranged opposite to the air inlet, and the air outlet side of the graphene heating body is arranged opposite to the air outlet; And / or, the air inlet is provided on the bottom surface or side surface of the housing, and the air outlet is provided on the top surface or side surface of the housing.

14. The electrical appliance according to claim 12, wherein, The housing has adjacent first side surface and second side surface. The air outlet includes a first air outlet provided on the first side surface and a second air outlet provided on the second side surface. The air outlet side of the graphene heating body is communicated with the first air outlet and the second air outlet.

15. The electrical appliance according to claim 14, wherein, The first side surface is the top side surface of the housing, the second side surface extends downward relative to the first side surface, and the second air outlet is located on the side of the second side surface close to the first side surface.

16. The electrical appliance according to claim 15, characterized in that, The air outlet direction of the air outlet side is inclined relative to the second side surface, so that the second air outlet blows air obliquely; And / or, the air inlet is arranged on the bottom side surface of the housing, and the air inlet side of the graphene heating element is communicated with the air inlet.

17. The electrical appliance according to any one of claims 12 to 16, characterized in that, The heater further includes a blower arranged in the housing, and the blower is used to drive air flow to flow from the air inlet through the graphene heating element towards the air outlet.

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