Wind turbine blade capable of wireless induction heating and manufacturing method

Abstract

The present application relates to the field of wind power generation, and in particular to a wind turbine blade capable of wireless induction heating and a manufacturing method. The blade comprises blade base layers, a wind turbine tower, a guide rail, and a transmitting induction coil. Each blade base layer is sequentially provided with a wireless induction layer and an electric heating function layer from inside to outside. The guide rail is embedded in the wind turbine tower, and is internally provided with the transmitting induction coil. The wind turbine blade capable of wireless induction heating of the present application is applied to wind turbine blades. An external wireless power transmission device acts on the transmitting induction coil, the transmitting induction coil and the electric heating function layer are electrically connected to each other by means of electrodes, and the electric heating function layer generates heat by using wireless power transmission electromagnetic induction technology, thereby effectively solving the problem of blade icing and reducing the load on wind turbine blades. In addition, the wind turbine blade can fit well against a flexible electric heating film, thereby greatly reducing the impact on the aerodynamic characteristics of wind turbine operation, improving the utilization rate of wind energy, and increasing the economic benefits of wind power generation. The wireless induction transmitting guide rail is integrated with the wind turbine tower, thereby saving space.

Description

A wireless induction heating fan blade and its manufacturing method

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411552406.0, filed on November 1, 2024, entitled "A Wireless Induction Heating Fan Blade and Preparation Method", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of wind power generation, and specifically relates to a wireless induction heating wind turbine blade. Background Technology

[0004] In recent years, with the increasingly severe environmental pollution and energy crisis, my country has attached greater and greater importance to clean and new energy sources for sustainable use. Among them, wind energy has advantages such as being pollution-free, abundant reserves, and renewable, and has enormous development and utilization potential. my country has conducted extensive field surveys in various regions to prepare for the development of wind power generation. Today, large-capacity wind turbine units have been installed and put into operation in parts of the country, and my country's wind power industry has achieved rapid and efficient development.

[0005] 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.

[0006] Therefore, in response to the above-mentioned problems caused by blade icing, this application discloses a wireless induction heating fan blade, which solves the problem by using a wireless induction guide rail to excite radio induction to heat and melt the blade. Summary of the Invention

[0007] The main purpose of this application 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 the fan blade.

[0008] To achieve the above objectives, a first aspect of this application is to provide a wireless induction heating fan blade, comprising:

[0009] 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.

[0010] Optionally, 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.

[0011] Optionally, the wireless sensing layer includes an insulating carrier layer and a voltage sensing coil, wherein the insulating carrier layer integrates the voltage sensing coil into the electrothermal functional layer; the voltage sensing coil is disposed on the outer surface of the electrothermal functional layer and electrically connected to the electrode.

[0012] Optionally, the material of the insulating carrier layer includes any one or a combination of at least two of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate;

[0013] 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;

[0014] The insulating matrix includes any one or a combination of at least two of thermoplastic polyurethane, polyethylene oxide, polypropylene, polyethylene, and polyethersulfone.

[0015] 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.

[0016] Optionally, the insulating substrate in the electrothermal functional layer is 5-15 parts by weight, and the conductive powder is 1-15 parts by weight.

[0017] Optionally, the thickness of the electrothermal functional layer is 50-200 μm.

[0018] Optionally, the median diameter of the conductive powder is selected from 5 nm to 20 nm.

[0019] Optionally, the volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:1.

[0020] Secondly, this application provides a method for manufacturing wireless induction heating fan blades, comprising:

[0021] 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.

[0022] 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.

[0023] The electrodes are placed on the surface of the heating element away from the insulating layer;

[0024] A first insulating layer is formed on the surface of the heating element away from the insulating layer, thereby forming an electrothermal functional layer;

[0025] 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;

[0026] An external insulating bearing layer is provided on the side of the voltage sensing coil that is away from the first insulating layer;

[0027] The insulating load-bearing layer is installed on the outer surface of the wind turbine blade base layer.

[0028] Optionally, the organic solvent includes any one or a combination of at least two of N-methylpyrrolidone, N,N-dimethylformamide, or N,N-dimethylacetamide.

[0029] The beneficial effects of this application are:

[0030] Specifically:

[0031] 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.

[0032] 2. The wireless induction heating fan blades of this application 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.

[0033] 3. The wireless induction heating fan blades of this application 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.

[0034] 4. The wireless induction transmitting rail is integrated with the wind turbine column, saving space. Attached Figure Description

[0035] Figure 1 is a schematic diagram of the modified wind power generation projector of this application.

[0036] Figure 2 is a schematic diagram of the structure of the wireless induction heating fan blade of this application.

[0037] Figure 3 shows the electrothermal curve of the blades of the wireless induction heating fan in Example 1 of this application.

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0040] 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 application’s 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.

[0041] 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 application 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.

[0042] Referring to Figures 1 and 2, this application provides a wireless induction heating fan blade, including: 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 a transmitting induction coil 400 inside.

[0043] 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.

[0044] 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.

[0045] The wireless induction heating wind turbine blade provided in this application 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.

[0046] This application employs a wireless power supply method, avoiding the cumbersome cables and safety hazards of traditional wired power supply methods, 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 method, 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 application can reduce the load on the wind turbine blades, improving wind turbine operating efficiency and wind energy utilization.

[0047] Referring to Figure 2, in this application, the layer 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, thereby serving as the basis for heating.

[0048] 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.

[0049] The working principle of the wireless induction heating fan blade in this application 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 line. A changing current is applied to the transmitting induction coil 400 via the power line, 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 therein. 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.

[0050] This application employs a wireless power supply method, avoiding the cumbersome cables and safety hazards of traditional wired power supply methods. 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 quickly 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, ensuring good bonding between the conductive powder and the insulating substrate. A selectable median diameter range is between 5nm and 20nm, where the dispersion and bonding of the conductive powder are even 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.

[0051] 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.

[0052] In one embodiment, the median diameter of the conductive powder is selected from 5 nm to 50 nm.

[0053] 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. Optionally, the median diameter of the conductive powder is selected from 5 nm to 20 nm, which provides good dispersion and bonding.

[0054] In one embodiment, the volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:1.

[0055] 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. Optionally, the volume ratio of conductive powder to insulating substrate is between 1:20 and 1:10.

[0056] 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).

[0057] 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).

[0058] 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.

[0059] 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.

[0060] In one embodiment, the insulating substrate in the heating element 630 has a weight ratio of 5-15, and the conductive powder has a weight ratio of 1-15.

[0061] This embodiment provides optional choices and weight percentages for the insulating substrate and conductive powder. The combination of these material choices and weight percentages enables the heating element 630 to achieve its intended working effect.

[0062] In one embodiment, the thickness of the heating element is 50-200 μm.

[0063] In this embodiment, an optional heating element thickness of 630 is provided to meet the heating requirements while facilitating processing.

[0064] In one embodiment, the insulating carrier layer 510, the first insulating layer 610, and the second insulating layer 640 are made of polyimide.

[0065] The consistent material selection simplifies the processing and enhances the bonding between the outer encapsulation layer 3 and the insulating layer 230.

[0066] This application also provides a method for manufacturing blades for wireless induction heating fans, comprising:

[0067] 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.

[0068] The paste of the heating element 630 is applied to the surface of the second insulating layer 640 and cured at high temperature;

[0069] Electrode 620 is disposed on the surface of heating element 630 away from the second insulating layer 640;

[0070] 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;

[0071] 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;

[0072] 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;

[0073] The above process can be used to prepare wireless heating battery current collectors.

[0074] The method for preparing wireless induction-heated fan blades provided in this application is primarily 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.

[0075] 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.

[0076] The preparation method provided in this application 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, and the layer structure is compact, without significantly altering the aerodynamic shape of the blade. This ensures the normal operation of the wind turbine blade and its power generation efficiency. The use of wireless power supply avoids the cumbersome cables and safety hazards of traditional wired power supply methods, 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 does not require the combustion of fossil fuels, reducing environmental pollution and carbon emissions, thus meeting the requirements of environmental protection and sustainable development.

[0077] In one embodiment, a method for manufacturing wireless induction heating fan blades includes:

[0078] 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.

[0079] 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;

[0080] Electrode 620 is disposed on the surface of heating element 630 away from the second insulating layer 640;

[0081] 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;

[0082] 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;

[0083] 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;

[0084] An insulating load-bearing layer 510 is mounted on the outer surface of the wind turbine blade base layer 100.

[0085] 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.

[0086] 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).

[0087] 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).

[0088] 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.

[0089] The organic solvent includes any one or a combination of at least two of N,N-dimethylpyrrolidone, N,N-dimethylformamide, or N,N-dimethylacetamide.

[0090] 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.

[0091] Example 1:

[0092] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0093] (1) Dissolve 5 parts by weight of thermoplastic polyurethane particles (insulating matrix raw material) in 80 parts by weight of N,N dimethylpyrrolidone solution. Under these conditions, a TPU-NMP solution is prepared by mechanical stirring;

[0094] (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.

[0095] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated onto the surface of the polyimide film (second insulating layer 640), and then... After drying for 8 hours, the heating element 630 is formed by high-temperature curing.

[0096] (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.

[0097] (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 40μm, thus obtaining a wireless induction heating fan blade.

[0098] Referring to Figure 2, the electrothermal curve of the wireless induction heating fan blades in this embodiment is shown. 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.

[0099] The wireless heating fan blades obtained in this embodiment can rapidly reach a constant temperature within 100 seconds when a 12V voltage is applied, and the constant temperature can reach [amount missing].

[0100] Example 2

[0101] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0102] (1) Dissolve 10 parts by weight of polyethylene oxide particles (insulating matrix raw material) in 80 parts by weight of N,N dimethylformamide solution, and then... Under these conditions, a PEO-DMF solution is prepared by mechanical stirring;

[0103] (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.

[0104] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated onto the surface of the polyimide film (second insulating layer 640), and then... After drying for 10 hours, it is cured at high temperature to form an electric heating element 630.

[0105] (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.

[0106] (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 60μm, thus obtaining a wireless induction heating fan blade.

[0107] The wireless heating fan blades obtained in this embodiment can rapidly reach a constant temperature within 50 seconds when a 9V voltage is applied, and the constant temperature can reach [amount missing].

[0108] Example 3

[0109] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0110] (1) Dissolve 13 parts by weight of polypropylene granules (insulating matrix raw material) in 85 parts by weight of N,N dimethylacetamide solution, and... Under these conditions, a PP-DMAC solution was prepared by mechanical stirring;

[0111] (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.

[0112] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated onto the polyimide film (second insulating layer 640), and then... After drying for 12 hours, the heating element 630 is formed by high-temperature curing.

[0113] (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.

[0114] (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 carrier layer 510 is installed on the outer surface of the voltage induction coil 520. The insulating carrier layer 510 has a packaging thickness of 50μm, thus obtaining a wireless induction heating fan blade.

[0115] The wireless heating fan blades obtained in this embodiment can rapidly reach a constant temperature within 50 seconds when a 12V voltage is applied, and the constant temperature can reach [amount missing].

[0116] Example 4

[0117] The specific material composition and implementation steps for a wireless induction heating fan blade are as follows:

[0118] (1) Dissolve 7 parts by weight of polyethylene granules (insulating matrix material) in 90 parts by weight of N,N dimethylpyrrolidone solution, and then... Under these conditions, a PE-NMP solution is prepared by mechanical stirring;

[0119] (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.

[0120] (3) The paste of the heating element 630 prepared in step (2) is uniformly coated onto the surface of the polyimide film (second insulating layer 640), and then... After drying for 12 hours, the heating element 630 is formed by high-temperature curing.

[0121] (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.

[0122] (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 65μm, thus obtaining an insulating carrier layer 510.

[0123] The wireless heating fan blades obtained in this embodiment can rapidly reach a constant temperature within 50 seconds when a 16V voltage is applied, and the constant temperature can reach [amount missing].

[0124] The embodiments described above are merely preferred solutions of this application and are not intended to limit this application in any way. Other variations and modifications are possible without exceeding the scope of 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. 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.

2. The wireless induction heating fan blade according to claim 1, characterized in that, 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).

3. The wireless induction heating fan blade according to claim 2, characterized in that, 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).

4. The wireless induction heating fan blade according to claim 3, characterized in that, 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.

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

6. 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.

7. The wireless induction heating fan blade according to claim 2, characterized in that, The median diameter of the conductive powder is selected from 5 nm to 20 nm.

8. The wireless induction heating fan blade according to claim 2, characterized in that, The volume ratio of the conductive powder to the insulating substrate is between 1:20 and 1:

1.

9. A method for manufacturing wireless induction heating fan blades, characterized in that, include: 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 installed on the base layer (100) of the wind turbine blade.

10. The method according to claim 9, 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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