Wireless induction heating fan blade and preparation method

Abstract

The present application relates to the field of wind power generation, specifically to a wireless induction heating fan blade and a preparation method, comprising a blade base layer, a wind power generation column, a guide rail and a transmitting induction coil, the blade base layer is sequentially provided with a wireless induction layer and an electric heating functional layer from inside to outside, the guide rail is embedded in the wind power generation column, and the transmitting induction coil is arranged inside.The wireless induction heating fan blade is applied to the fan blade, and the transmitting induction coil is acted on by an external wireless power supply transmitting device, an electrode electrically connects the transmitting induction coil and the electric heating functional layer, the wireless power supply electromagnetic induction technology makes the electric heating functional layer heat, effectively solves the blade icing problem, reduces the fan blade load, the fan blade and the flexible electric heating functional film can be well attached, greatly reduces the influence on the fan operation aerodynamic characteristics, improves the wind energy utilization rate, increases the economic benefit of wind power generation, and the wireless induction transmitting guide rail and the wind power generation column are integrated, saving the space utilization.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation, and specifically relates to a wireless induction heating wind turbine blade. Background Technology

[0002] Wind energy has advantages such as being pollution-free, abundant reserves, and renewable, and it has enormous potential for development and utilization. my country has conducted extensive field surveys in various regions to prepare for the development of wind power generation, and large-capacity wind turbine generators have now been installed and put into operation in parts of the country.

[0003] While wind turbines are being deployed in large numbers, they also face a series of severe challenges, the most prominent of which is icing, which can render them inoperable. To maximize the use of wind resources, almost all wind turbines are installed in open, cold, high-altitude areas and near the coast where winds are strong. Due to the special nature of these environments, wind turbine blades are more likely to encounter icing disasters.

[0004] Therefore, in view of the above-mentioned problems caused by blade icing, the present invention discloses a wireless induction heating fan blade, which solves the problem by using a wireless induction guide rail to excite radio induction to heat the blade and melt the ice. Summary of the Invention

[0005] The main objective of this invention is to provide a wireless induction heating fan blade, its manufacturing process, and its application, aiming to solve the problem of rapid de-icing and reducing the load on fan blades.

[0006] To achieve the above objectives, a first aspect of the present invention is to provide a wireless induction heating fan blade, comprising:

[0007] The blade base layer, wind turbine column, guide rail, and transmitting induction coil are provided. The blade base layer is provided with a wireless sensing layer and an electrothermal functional layer from the inside to the outside. The guide rail is embedded in the wind turbine column and has a transmitting induction coil inside.

[0008] As a further improvement of the present invention, the electrothermal functional layer includes a first insulating layer, a second insulating layer, an electrode, and an electrothermal element. The electrode is exposed on the outer surface of the electrothermal element. The electrothermal element includes an insulating substrate and conductive powder dispersed in the insulating substrate. The first insulating layer and the second insulating layer are respectively disposed on the outer surfaces of the electrode and the electrothermal element.

[0009] As a further improvement of the present invention, the wireless sensing layer includes an insulating carrier layer and a voltage sensing coil, wherein the insulating carrier layer combines the voltage sensing coil with the electrothermal functional layer; the voltage sensing coil is disposed on the outer surface of the electrothermal functional layer and is electrically connected to the electrode.

[0010] As a further improvement of the present invention, the material of the insulating bearing layer includes any one or a combination of at least two of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate.

[0011] The materials of the first insulating layer and the second insulating layer include any one or a combination of at least two of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate;

[0012] The insulating matrix includes any one or a combination of at least two of thermoplastic polyurethane, polyethylene oxide, polypropylene, polyethylene, and polyethersulfone.

[0013] The conductive powder includes any one or a combination of at least two of the following: nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes.

[0014] As a further improvement of the present invention, the insulating substrate in the electrothermal functional layer has a weight ratio of 5 to 15, and the conductive powder has a weight ratio of 1 to 15.

[0015] As a further improvement of the present invention, the thickness of the electrothermal functional layer is 50~200 μm.

[0016] As a further improvement of the present invention, the median diameter of the conductive powder is selected in the range of 5 nm to 20 nm.

[0017] As a further improvement of the present invention, the volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:1.

[0018] In a second aspect, the present invention provides a method for manufacturing wireless induction heating fan blades, comprising:

[0019] Weigh out 5 to 15 parts of organic polymer binder and add them to 80 to 90 parts of organic solvent to dissolve and obtain a polymer solution. Weigh out 1 to 15 parts of conductive powder and add them to the polymer solution. Stir thoroughly to obtain the slurry for the electrothermal functional layer.

[0020] The paste for the electrothermal functional layer is applied to the surface of the insulating layer and cured at high temperature to form an electrothermal sheet.

[0021] The electrodes are placed on the surface of the heating element away from the insulating layer;

[0022] A first insulating layer is formed on the surface of the heating element away from the insulating layer, thereby forming an electrothermal functional layer;

[0023] A voltage sensing coil is disposed on the outer surface of the first insulating layer, and the voltage sensing coil is electrically connected to the electrode;

[0024] An external insulating bearing layer is provided on the side of the voltage sensing coil that is away from the first insulating layer;

[0025] The insulating load-bearing layer is installed on the outer surface of the wind turbine blade base layer.

[0026] As a further improvement of the present invention, the organic solvent includes any one or a combination of at least two of N-methylpyrrolidone, N,N-dimethylformamide or N,N-dimethylacetamide.

[0027] The beneficial effects of this invention are:

[0028] Specifically:

[0029] 1. A heating layer is introduced into the wind turbine blades. A wireless power supply transmitter is installed on the wireless power generation pile to act on the induction coil. The electrode electrically connects the induction coil to the electrothermal functional layer. In other words, the wireless power supply electromagnetic induction technology makes the electrothermal functional layer heat up.

[0030] 2. The wireless induction heating fan blades of the present invention have wireless charging heating sensing function. By utilizing wireless charging electromagnetic induction technology, the de-icing problem can be effectively solved and the load on the fan blades can be reduced.

[0031] 3. The wireless induction heating fan blades of this invention can be well bonded with the flexible electrothermal functional film, which greatly reduces the impact on the aerodynamic characteristics of the fan operation, improves the utilization rate of wind energy, and increases the economic benefits of wind power generation.

[0032] 4. The wireless induction transmitting rail is integrated with the wind turbine column, saving space. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the modified wind power generation projector of the present invention. Figure 2 This is a schematic diagram of the structure of the wireless induction heating fan blade of the present invention. Figure 3 This is the electrothermal curve of the wireless induction heating fan blade in Example 1 of the present invention.

[0034] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. The term “and / or” as used herein includes all or any units and all combinations thereof of one or more associated listed items.

[0037] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0038] Reference Figure 1 and Figure 2 The present invention provides a wireless induction heating fan blade, comprising: a blade base layer 100, a wind power generation column 200, a guide rail 300, and a transmitting induction coil 400. The blade base layer is provided with a wireless induction layer 500 and an electrothermal functional layer 600 from the inside to the outside. The guide rail 300 is embedded in the wind power generation column 200 and has the transmitting induction coil 400 installed inside.

[0039] The wireless sensing layer 500 includes an insulating carrier layer 510 and a voltage sensing coil 520. The insulating carrier layer 510 combines the voltage sensing coil 520 with the electrothermal functional layer 600. The voltage sensing coil 520 is disposed on the outer surface of the electrothermal functional layer 600 and is electrically connected to the electrode 620.

[0040] The electrothermal functional layer 600 includes a first insulating layer 610, a second insulating layer 640, an electrode 620, and an electrothermal element 630. The electrode 620 is exposed on the outer surface of the electrothermal element 630. The electrothermal element 630 includes an insulating substrate and conductive powder dispersed in the insulating substrate. The first insulating layer 610 and the second insulating layer 640 are respectively disposed on the outer surfaces of the electrode 620 and the electrothermal element 630.

[0041] The wireless induction heating wind turbine blade provided by this invention operates primarily based on electromagnetic induction and electrothermal conversion. When the wireless power supply transmitter (not explicitly shown in the figures, but part of the system) around the wind turbine column 200 (which may refer to a broader concept, including the support structure of the entire wind power generation system or a specific power generation unit, not just a single column) operates, it generates a changing magnetic field. This magnetic field penetrates the blade base layer 100 and acts on the voltage induction coil 520 in the wireless induction layer 500. According to Faraday's law of electromagnetic induction, the conductor in the voltage induction coil 520 generates an induced current in the changing magnetic field. The induced current then flows through the electrode 620 into the heating element 630 in the electrothermal functional layer 600. The heating element 630 consists of an insulating substrate and conductive powder dispersed therein. When the induced current flows through the conductive powder, electrical energy is converted into heat energy due to the resistance of the powder, thereby heating the heating element 630. The heated heating element 630 transfers heat to the blade base layer 100 through heat conduction, thereby heating the entire fan blade to achieve the purpose of anti-icing, de-icing, or maintaining the blade temperature.

[0042] This invention employs wireless power supply, avoiding the cumbersome cables and safety hazards of traditional wired power supply, thus improving system reliability and flexibility. The heating element 630 in the electrothermal functional layer 600 can rapidly convert electrical energy into heat energy, achieving high heating efficiency and quickly responding to environmental changes, effectively preventing blade icing. The wireless induction layer 500 and the electrothermal functional layer 600 are cleverly integrated into the blade base layer 100, without significantly altering the aerodynamic shape of the blades and having minimal impact on the aerodynamic characteristics of the wind turbine. Due to the wireless power supply, the system has lower maintenance costs and is easier to troubleshoot and repair. Wireless induction heating eliminates the need to burn fossil fuels, reducing environmental pollution and carbon emissions, meeting the requirements of environmental protection and sustainable development. By preventing blade icing and maintaining blade temperature, this invention can reduce the load on wind turbine blades, improving wind turbine operating efficiency and wind energy utilization.

[0043] Reference Figure 2 In this invention, the layered structure of the wireless induction heating fan blade includes an insulating support layer 510, a voltage sensing coil 520, a first insulating layer 610, a second insulating layer 640, an electrode 620, and a heating element 630. The heating element 630 includes an insulating substrate and conductive powder dispersed in the insulating substrate, thus the heating element 630 serves as the basis for heating.

[0044] Specifically, the external wireless power supply rail 300 internally houses the transmitting induction coil 400 and a power cord, through which a varying current is applied to the transmitting induction coil 400. This external wireless power supply transmitter interacts with the blades of the wireless induction heating fan, where voltage is obtained in the voltage induction coil 520 via the transmitting induction coil, and the heating element 630 serves as the basis for heating.

[0045] The working principle of the wireless induction heating fan blade in this invention is mainly based on the principles of electromagnetic induction and electrothermal conversion. The wireless power supply rail 300 internally houses a transmitting induction coil 400 and a power cord. A changing current is applied to the transmitting induction coil 400 via the power cord, thereby generating a changing magnetic field around it. The voltage induction coil 520 on the fan blade is placed in this changing magnetic field, and according to Faraday's law of electromagnetic induction, an induced current is generated in the voltage induction coil 520. The heating element 630 is the basis for heating; it consists of an insulating substrate and conductive powder dispersed within it. When the induced current passes through the conductive powder in the heating element 630, electrical energy is converted into heat energy due to the resistance of the powder, thus heating the heating element 630. The heated heating element 630 then transfers heat to other parts of the blade through thermal conduction, achieving the purpose of heating the blade.

[0046] This invention employs wireless power supply, avoiding the cumbersome cables and safety hazards of traditional wired power supply. The wireless power supply rail 300 and the transmitting induction coil 400 make the entire system structure simpler and more compact. The heating element 630 can rapidly convert electrical energy into heat energy, resulting in high heating efficiency. Since the induced current is generated instantly, the heating of the heating element 630 is also instantaneous, enabling rapid response to environmental changes. The median diameter of the conductive powder is selected within the range of 5nm to 50nm to ensure good bonding between the conductive powder and the insulating substrate. The preferred median diameter range is between 5nm and 20nm, where the dispersion and bonding of the conductive powder are better, resulting in a more significant heating effect. The layered structure of the wireless induction heating fan blades is cleverly integrated inside the blades without significantly altering their aerodynamic shape.

[0047] Therefore, the impact on the aerodynamic characteristics of the wind turbine is minimal, ensuring its normal operation and power generation efficiency. Due to the wireless power supply method, the system maintenance costs are low. Regular cable inspections and maintenance are unnecessary, reducing operating costs. Wireless induction heating eliminates the need for fossil fuel combustion, reducing environmental pollution and carbon emissions. This aligns with environmental protection and sustainable development requirements, contributing to the green development of the wind power industry.

[0048] In one embodiment, the median diameter of the conductive powder is selected from 5 nm to 50 nm.

[0049] In this embodiment, the particle size of the conductive powder ensures good bonding between the conductive powder and the insulating substrate, while its resistance is moderate, resulting in a good heating effect. Preferably, the median diameter of the conductive powder is selected in the range of 5 nm to 20 nm, which results in good dispersion and bonding.

[0050] In one embodiment, the volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:1.

[0051] In this embodiment, the proportion of conductive powder is limited by the volume ratio between conductive powder and insulating substrate to ensure good bonding and resistance. Preferably, the volume ratio of conductive powder to insulating substrate is between 1:20 and 1:10.

[0052] In one embodiment, the insulating carrier layer 510 is made of any one or at least two of polyethylene terephthalate (PET), polyimide (PI), polyurethane (PU), and ethylene vinyl acetate (EVA).

[0053] The materials of the first insulating layer 610 and the second insulating layer 640 include any one or a combination of at least two of polyethylene terephthalate (PET), polyimide (PI), polyurethane (PU), and ethylene vinyl acetate (EVA).

[0054] The conductive powder includes any one or a combination of at least two of the following: nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes.

[0055] This embodiment provides experimentally verified possible choices for the insulating carrier layer 510, the first insulating layer 610, the second insulating layer 640, the conductive powder, and the organic solvent.

[0056] In one embodiment, the insulating substrate in the heating element 630 has a weight ratio of 5 to 15, and the conductive powder has a weight ratio of 1 to 15.

[0057] This embodiment provides preferred selections and weight percentages of the insulating substrate and conductive powder. The combination of these material selections and weight percentages achieves the desired working effect of the heating element 630.

[0058] In one embodiment, the thickness of the heating element is 50~200 μm.

[0059] In this embodiment, a preferred thickness of 630 for the heating element is provided to meet the heating requirements while facilitating processing.

[0060] In one embodiment, the insulating carrier layer 510, the first insulating layer 610, and the second insulating layer 640 are made of polyimide.

[0061] The consistent material selection simplifies the processing and enhances the bonding between the outer encapsulation layer 3 and the insulating layer 230.

[0062] The present invention also provides a method for manufacturing wireless induction heating fan blades, comprising:

[0063] Weigh out 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve and obtain a polymer solution. Weigh out 1 to 15 parts of conductive powder and add them to the polymer solution. After stirring thoroughly, the paste of heating element 630 is obtained.

[0064] The paste of the heating element 630 is applied to the surface of the second insulating layer 640 and cured at high temperature;

[0065] Electrode 620 is disposed on the surface of heating element 630 away from the second insulating layer 640;

[0066] A first insulating layer 610 is provided on the surface of the heating element 630 that is away from the second insulating layer 640 to form an electrothermal functional layer 600;

[0067] A voltage sensing coil 520 is disposed on the outer surface of the first insulating layer 610, and the voltage sensing coil 520 is electrically connected to the electrode 620;

[0068] An insulating bearing layer 510 is provided on the side of the voltage induction coil 520 that is away from the first insulating layer 610;

[0069] The above process can be used to prepare wireless heating battery current collectors.

[0070] The method for preparing wireless induction-heated fan blades provided by this invention is mainly based on the preparation of the heating element and the assembly of the layer structure. First, an organic polymer binder is dissolved in an organic solvent to form a polymer solution. Then, conductive powder is added to the polymer solution and stirred thoroughly to form a slurry for the heating element. Next, the slurry is coated or applied to the surface of the second insulating layer 640 and cured at high temperature to solidify the polymer binder, thereby forming the heating element 630.

[0071] An electrode 620 is disposed on the surface of the heating element 630 facing away from the second insulating layer 640 for electrical connection to an external power source or induction coil. A first insulating layer 610 is disposed on the outer surface of the electrode 620 and the heating element 630 to protect them from environmental corrosion. A voltage induction coil 520 is disposed on the outer surface of the first insulating layer 610 and electrically connected to the electrode 620. Thus, when an external wireless power supply transmitter generates a changing magnetic field, an induced current is generated in the voltage induction coil 520, which then flows through the electrode 620 into the heating element 630, generating heat. Finally, an insulating support layer 510 is disposed on the side of the voltage induction coil 520 facing away from the first insulating layer 610 to provide additional support and protection.

[0072] The preparation method provided by this invention has clear steps, is simple to operate, and is easy to implement for industrial production. Wind turbine blades with wireless induction heating function can be prepared through steps such as coating, curing, and assembly. The heating element 630 is composed of an organic polymer binder, conductive powder, and an insulating layer, possessing good conductivity, thermal stability, and mechanical strength. The particle size and distribution of the conductive powder are controllable, resulting in more uniform and efficient heating of the heating element. The layers are tightly bonded, with a compact structure that does not significantly alter the aerodynamic shape of the blade, ensuring normal operation and power generation efficiency of the wind turbine blade. The use of wireless power supply avoids the cumbersome cables and safety hazards of traditional wired power supply, improving system reliability and safety. Due to the wireless power supply, the system maintenance cost is lower. Regular cable inspection and maintenance are unnecessary, reducing operating costs. Wireless induction heating eliminates the need for fossil fuel combustion, reducing environmental pollution and carbon emissions, thus meeting environmental protection and sustainable development requirements.

[0073] In one embodiment, a method for manufacturing wireless induction heating fan blades includes:

[0074] Weigh out 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve and obtain a polymer solution. Weigh out 1 to 15 parts of conductive powder and add them to the polymer solution. After stirring thoroughly, the paste of heating element 630 is obtained.

[0075] The paste of the heating element 630 is applied to the surface of the second insulating layer 640 and cured at high temperature to form the heating element 630;

[0076] Electrode 620 is disposed on the surface of heating element 630 away from the second insulating layer 640;

[0077] A first insulating layer 610 is provided on the surface of the heating element 630 that is away from the second insulating layer 640 to form an electrothermal functional layer 600;

[0078] A voltage sensing coil 520 is disposed on the outer surface of the first insulating layer 610, and the voltage sensing coil 520 is electrically connected to the electrode 620;

[0079] An external insulating bearing layer 510 is provided on the side of the voltage sensing coil 520 that is away from the first insulating layer 610;

[0080] An insulating load-bearing layer 510 is mounted on the outer surface of the wind turbine blade base layer 100.

[0081] In this embodiment, a processing method for electrode 620 is proposed, which improves the processing convenience of electrode 620, as well as the bonding and electrical connection between electrode 620 and heating element 630, while avoiding multiple drying processes.

[0082] Furthermore, the material of the insulating carrier layer 510 includes any one or a combination of at least two of polyethylene terephthalate (PET), polyimide (PI), polyurethane (PU), and ethylene vinyl acetate (EVA).

[0083] The materials of the first insulating layer 610 and the second insulating layer 640 include any one or a combination of at least two of polyethylene terephthalate (PET), polyimide (PI), polyurethane (PU), and ethylene vinyl acetate (EVA).

[0084] The conductive powder includes any one or a combination of at least two of the following: nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes.

[0085] The organic solvent includes any one or a combination of at least two of N,N-dimethylpyrrolidone, N,N-dimethylformamide, or N,N-dimethylacetamide.

[0086] The wireless power supply rail 300 internally houses a transmitting induction coil 400 and a power cord, through which a varying current is applied to the transmitting induction coil 400. An external wireless power supply transmitter interacts with the wireless induction heating fan blades, with the voltage in the voltage induction coil 520 obtaining voltage through the transmitting induction coil, and the heating element 630 serving as the heating source. Utilizing wireless charging electromagnetic induction technology can effectively solve the problem of wind turbine blade icing, reduce the load on the wind turbine blades, improve wind energy utilization, and increase the economic benefits of wind power generation.

[0087] Example 1:

[0088] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0089] (1) Dissolve 5 parts by weight of thermoplastic polyurethane particles (insulating matrix raw material) into 80 parts by weight of NN dimethylpyrrolidone solution, and stir mechanically at 60°C to form TPU-NMP solution.

[0090] (2) Add 15 parts by weight of conductive carbon black to the TPU-NMP solution prepared in step (1), and mix the conductive carbon black and TPU-NMP solution evenly by mechanical stirring to form the slurry of the heating element 630.

[0091] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (second insulating layer 640), and dried at 60 °C for 8 h, and then cured at high temperature to form the heating element 630.

[0092] (4) Place the copper electrode (electrode 620) on the surface of the heating element 630 in step (3), and encapsulate a polyimide film (first insulating layer 610) on the surface of the heating film to form the heating functional layer 600;

[0093] (5) A voltage induction coil 520 is installed on one side of the electrothermal functional layer 600 prepared in step (4). The induction coil is connected to the copper electrode in step (4). An insulating bearing layer 510 is installed on the outer surface of the voltage induction coil 520. The insulating bearing layer 510 has a thickness of 40 μm, thus obtaining a wireless induction heating fan blade.

[0094] Reference Figure 2 Figure 1 shows the electrothermal curve of the wireless induction heating fan blades in this embodiment. The experimental conditions were as follows: the wireless power supply transmitter was connected to a DC power supply with a rated voltage of 10V, and the distance between the wireless power supply transmitter and the wireless induction heating fan blades was 5-20cm. (The figure is shown in the original text.)

[0095] The infinitely heated fan blades obtained in this embodiment can quickly reach a constant temperature of 65°C within 100 seconds when a voltage of 12V is applied.

[0096] Example 2

[0097] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0098] (1) Dissolve 10 parts by weight of polyethylene oxide particles (insulating matrix raw material) in 80 parts by weight of NN dimethylformamide solution, and stir mechanically at 70°C to form PEO-DMF solution;

[0099] (2) Add 10 parts by weight of nano silver powder to the PEO-DMF solution prepared in step (1), and mix the nano silver powder and PEO-DMF solution evenly by mechanical stirring to form the slurry of heating element 630.

[0100] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (second insulating layer 640), and dried at 70 °C for 10 h, and then cured at high temperature to form the heating element 630.

[0101] (4) Place the copper electrode (electrode 620) on the surface of the heating element 630 in step (3), and encapsulate a polyimide film (first insulating layer 610) on the surface of the heating film to form the heating functional layer 600;

[0102] (5) A voltage induction coil 520 is installed on one side of the electrothermal functional layer 600 prepared in step (4). The induction coil is connected to the copper electrode in step (4). An insulating bearing layer 510 is installed on the outer surface of the voltage induction coil 520. The insulating bearing layer 510 has a thickness of 60 μm, thus obtaining a wireless induction heating fan blade.

[0103] The infinitely heated fan blades obtained in this embodiment can quickly reach a constant temperature state within 50 seconds when a voltage of 9 V is applied, and the constant temperature can reach 60℃.

[0104] Example 3

[0105] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0106] (1) Dissolve 13 parts by weight of polypropylene particles (insulating matrix raw material) in 85 parts by weight of NN dimethylacetamide solution, and stir mechanically at 80 °C to form PP-DMAC solution;

[0107] (2) Add 13 parts by weight of nano iron powder and nano aluminum powder to the PP-DMAC solution prepared in step (1), and mix the nano iron powder and nano aluminum powder with the PP-DMAC solution evenly by mechanical stirring to form the slurry of the heating element 630.

[0108] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated on the polyimide film (second insulating layer 640) and dried at 65 °C for 12 h. After high temperature curing, the heating element 630 is formed.

[0109] (4) Place the copper electrode (electrode 620) on the surface of the heating element 630 in step (3), and encapsulate a polyimide film (first insulating layer 610) on the surface of the heating film to form the heating functional layer 600;

[0110] (5) Install a voltage induction coil 520 on one side of the electrothermal functional layer 600 prepared in step (4). Connect the induction coil to the copper electrode in step (4). Install an insulating carrier layer 510 on the outer surface of the voltage induction coil 520. The insulating carrier layer 510 has a packaging thickness of 50 μm, thus obtaining a wireless induction heating fan blade.

[0111] The infinitely heated fan blades obtained in this embodiment can quickly reach a constant temperature state within 50 seconds when a voltage of 12 V is applied, and the constant temperature can reach 80℃.

[0112] Example 4

[0113] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0114] (1) Dissolve 7 parts by weight of polyethylene particles (insulating matrix raw material) into 90 parts by weight of NN dimethylpyrrolidone solution, and stir mechanically at 85 °C to form PE-NMP solution;

[0115] (2) Add 3 parts by weight of conductive carbon black and carbon nanotubes to the PE-NMP solution prepared in step (1), and mix the conductive carbon black and carbon nanotubes with the PE-NMP solution evenly by mechanical stirring to form the slurry of the heating element 630.

[0116] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (second insulating layer 640), and dried at 65 °C for 12 h, and then cured at high temperature to form the heating element 630.

[0117] (4) Place the copper electrode (electrode 620) on the surface of the heating element 630 in step (3), and encapsulate a polyimide film (first insulating layer 610) on the surface of the heating film to form the heating functional layer 600;

[0118] (5) A voltage sensing coil 520 is installed on the other side of the electrothermal functional layer 600 prepared in step (4). The sensing coil is connected to the copper electrode in step (4). An insulating carrier layer 510 is installed on the outer surface of the voltage sensing coil 520. The insulating carrier layer 510 has a packaging thickness of 65 μm, thus obtaining an insulating carrier layer 510.

[0119] The infinitely heated fan blades obtained in this embodiment can quickly reach a constant temperature of 95°C within 50 seconds when a voltage of 16V is applied.

[0120] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A wireless induction heating fan blade, characterized in that, include: The blade base layer (100), wind turbine column (200), guide rail (300) and transmitting induction coil (400) are provided in the blade base layer from the inside to the outside. The blade base layer is provided with a wireless sensing layer (500) and an electrothermal functional layer (600) from the inside to the outside. The guide rail (300) is embedded in the wind turbine column (200) and the transmitting induction coil (400) is installed inside. The electrothermal functional layer (600) includes a first insulating layer (610), a second insulating layer (640), an electrode (620), and an electrothermal element (630). The electrode (620) is exposed on the outer surface of the electrothermal element (630). The electrothermal element (630) includes an insulating substrate and conductive powder dispersed in the insulating substrate. The first insulating layer (610) and the second insulating layer (640) are respectively disposed on the outer surfaces of the electrode (620) and the electrothermal element (630). The wireless sensing layer (500) includes an insulating carrier layer (510) and a voltage sensing coil (520). The insulating carrier layer (510) combines the voltage sensing coil (520) with the electrothermal functional layer (600). The voltage sensing coil (520) is disposed on the outer surface of the electrothermal functional layer (600) and is electrically connected to the electrode (620). The material of the insulating support layer (510) includes any one or a combination of at least two of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate. The materials of the first insulating layer (610) and the second insulating layer (640) include any one or a combination of at least two of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate. The insulating matrix includes any one or a combination of at least two of thermoplastic polyurethane, polyethylene oxide, polypropylene, polyethylene, and polyethersulfone. The conductive powder includes any one or a combination of at least two of the following: nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes. A method for manufacturing wireless induction heating fan blades includes: Weigh out 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve and obtain a polymer solution. Weigh out 1 to 15 parts of conductive powder and add them to the polymer solution. After stirring thoroughly, the slurry of the electrothermal functional layer (600) is obtained. The paste of the electric heating functional layer (600) is applied to the surface of the insulating layer (640) and cured at high temperature to form an electric heating element (630). The electrode (620) is disposed on the surface of the heating element (630) away from the insulating layer (640); A first insulating layer (610) is provided on the surface of the heating element (630) away from the insulating layer (640) to form an electrothermal functional layer (600). A voltage sensing coil (520) is disposed on the outer surface of the first insulating layer (610), and the voltage sensing coil (520) is electrically connected to the electrode (620). An external insulating bearing layer (510) is provided on the side of the voltage sensing coil (520) that is away from the first insulating layer (610). The outer surface of the insulating load-bearing layer (510) is fitted onto the base layer (100) of the wind turbine blade.

2. The wireless induction heating fan blade according to claim 1, characterized in that, The insulating substrate in the electrothermal functional layer (600) has a weight ratio of 5 to 15, and the conductive powder has a weight ratio of 1 to 15.

3. The wireless induction heating fan blade according to claim 1, characterized in that, The thickness of the electrothermal functional layer (600) is 50~200 μm.

4. The wireless induction heating fan blade according to claim 1, characterized in that, The median diameter of the conductive powder is selected from 5 nm to 20 nm.

5. The wireless induction heating fan blade according to claim 1, characterized in that, The volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:

1.

6. The wireless induction heating fan blade according to claim 1, characterized in that, The organic solvent includes any one or a combination of at least two of N-methylpyrrolidone, N,N-dimethylformamide, or N,N-dimethylacetamide.

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