Wireless induction heating fan blade and preparation method

Abstract

The invention relates to the field of wind power generation, in particular to a wireless induction heating fan blade and a preparation method thereof.The wireless induction heating fan blade comprises a blade base layer, a wind power generation column, a guide rail and an emission induction coil, the blade base layer is sequentially provided with a wireless induction layer and an electric heating function layer from inside to outside, and the guide rail is embedded in the wind power generation column; a transmitting induction coil is arranged inside. The wireless induction heating fan blade is applied to the fan blade, the external wireless power supply transmitting device acts on the transmitting induction coil, the transmitting induction coil is electrically connected with the electric heating function layer through the electrode, the electric heating function layer is heated through the wireless power supply electromagnetic induction technology, the problem of icing of the blade is effectively solved, and the service life of the fan blade is prolonged. The fan blade load is reduced; the fan blades can be well attached to the flexible electric heating function film, the influence on the operation aerodynamic characteristics of the fan is greatly reduced, the utilization rate of wind energy is increased, and the economic benefit of wind power generation is increased; the wireless induction transmitting guide rail and the wind power generation column are integrated, and space utilization is saved.

Description

Technical Field

[0001] The invention belongs to the field of wind power generation, and in particular relates to a wireless induction heating fan blade. Background Art

[0002] Wind energy has the advantages of being pollution-free, abundant in reserves, and renewable, and has huge potential for development and utilization. my country has conducted a large number of field surveys in various regions to prepare for the development of wind power generation, and now large-capacity wind turbines have been installed in some parts of the country.

[0003] As wind turbines are put into large quantities, they are also facing a series of severe tests, the most prominent of which is ice accumulation on wind turbines, which makes them inoperable. In order to maximize the use of wind resources, almost all wind turbines are installed in open high-cold areas and near the coast with strong winds. Due to the particularity of the regional environment, the probability of wind turbine blades encountering ice disasters is higher.

[0004] Therefore, in view of the above problems caused by ice on blades, the present invention discloses a wireless induction heating fan blade, which solves the problem by exciting the wireless induction blade heating and ice melting through a wireless induction guide. Summary of the invention

[0005] The main purpose of the present invention is to provide a wireless induction heating fan blade, a preparation process and an application, aiming to solve the problem of rapid deicing and reducing the load on the fan blade.

[0006] In order to achieve the above object, the first aspect of the present invention is to provide a wireless induction heating fan blade, comprising: The blade base layer, the wind power generation column, the guide rail and the transmitting induction coil, the blade base layer is provided with a wireless induction layer and an electric heating functional layer from the inside to the outside, the guide rail is embedded in the wind power generation column, and the transmitting induction coil is installed inside.

[0007] As a further improvement of the present invention, the electrothermal functional layer includes a first insulating layer, a second insulating layer, an electrode and a heating plate, the electrode is exposed on the outer surface of the heating plate, the heating plate includes an insulating matrix and conductive powder dispersed in the insulating matrix, and the first insulating layer and the second insulating layer are respectively arranged on the outer surfaces of the electrode and the heating plate.

[0008] As a further improvement of the present invention, the wireless induction layer includes an insulating bearing layer and a voltage induction coil, and the insulating bearing layer combines the voltage induction coil with the electrothermal functional layer; the voltage induction coil is arranged on the outer surface of the electrothermal functional layer and is electrically connected to the electrode.

[0009] As a further improvement of the present invention, the material of the insulating bearing layer includes any one of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate, or a combination of at least two thereof; The material of the first insulating layer and the second insulating layer includes any one of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate, or a combination of at least two thereof; The insulating matrix includes any one of thermoplastic polyurethane, polyethylene oxide, polypropylene, polyethylene, and polyethersulfone, or a combination of at least two thereof; The conductive powder includes any one of nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes, or a combination of at least two of them.

[0010] As a further improvement of the present invention, the weight percentage of the insulating matrix in the electrothermal functional layer is 5-15, and the weight percentage of the conductive powder is 1-15.

[0011] As a further improvement of the present invention, the thickness of the electrothermal functional layer is 50-200 μm.

[0012] As a further improvement of the present invention, the median diameter of the conductive powder is selected to be in the range of 5 nm to 20 nm.

[0013] As a further improvement of the present invention, the volume ratio of the conductive powder to the insulating matrix is ​​between 1:20 and 1:1. In a second aspect, the present invention provides a method for preparing a wireless induction heating fan blade, comprising: Weigh 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve to obtain a polymer solution, weigh 1 to 15 parts of conductive powder and add them to the polymer solution, and stir them thoroughly to obtain a slurry for the electric heating functional layer; The slurry of the electric heating functional layer is placed on the surface of the insulating layer and cured at high temperature to form an electric heating sheet; The electrode is arranged on the surface of the heating plate away from the insulating layer; Arranging a first insulating layer on the surface of the electric heating plate away from the insulating layer to form an electric heating functional layer; A voltage induction coil is arranged on the outer surface of the first insulating layer, and the voltage induction coil is electrically connected to the electrode; An external insulating bearing layer is arranged on a side of the voltage induction coil away from the first insulating layer; The outer surface of the insulating bearing layer is arranged on the base layer of the wind turbine blade.

[0014] As a further improvement of the present invention, the organic solvent includes any one of N-methylpyrrolidone, N,N-dimethylformamide or N,N-dimethylacetamide, or a combination of at least two thereof.

[0015] The beneficial effects of the present invention are: Specifically: 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, and the electrode electrically connects the induction coil with the electric heating functional layer. The wireless power supply electromagnetic induction technology makes the electric heating functional layer heat up. 2. The wireless induction heating fan blades of the present invention have wireless charging heating sensing function, and utilize wireless charging electromagnetic induction technology to effectively solve the deicing problem and reduce the load on the fan blades; 3. The wireless induction heating fan blades of the present invention can fit well with the flexible electric heating 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.

[0016] 4. The wireless induction transmitting guide rail is integrated with the wind power generation column, saving space utilization BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 This is a schematic diagram of the structure of the modified wind power generation column injection device of the present invention. Figure 2 is a schematic diagram of the structure of the wireless induction heating fan blade of the present invention, Figure 3 It is the electric heating curve of the wireless induction heating fan blade in Example 1 of the present invention.

[0017] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0019] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the 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" used herein includes all or any unit and all combinations of one or more associated listed items.

[0020] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0021] 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, wherein the blade base layer is provided with a wireless induction layer 500 and an electrothermal functional layer 600 in sequence from the inside to the outside, the guide rail 300 is embedded in the wind power generation column 200, and a transmitting induction coil 400 is arranged inside.

[0022] The wireless induction layer 500 includes an insulating bearing layer 510 and a voltage induction coil 520. The insulating bearing layer 510 combines the voltage induction coil 520 with the electrothermal functional layer 600. The voltage induction coil 520 is arranged on the outer surface of the electrothermal functional layer 600 and is electrically connected to the electrode 620.

[0023] The electrothermal functional layer 600 includes a first insulating layer 610, a second insulating layer 640, an electrode 620 and a heating plate 630, wherein the electrode 620 is exposed on the outer surface of the heating plate 630, and the heating plate 630 includes an insulating matrix and conductive powder dispersed in the insulating matrix. The first insulating layer 610 and the second insulating layer 640 are respectively arranged on the outer surfaces of the electrode 620 and the heating plate 630.

[0024] The wireless induction heating fan blade provided by the present invention has a working principle mainly based on electromagnetic induction and electrothermal conversion. When the wireless power supply transmitter (not explicitly shown in the figure, but part of the system) around the wind power generation column 200 (here it 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) works, it will generate a changing magnetic field. This magnetic field will penetrate the blade base layer 100 and act 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 will generate an induced current in the changing magnetic field. The induced current then flows into the electric heating plate 630 in the electrothermal functional layer 600 through the electrode 620. The electric heating plate 630 is composed of an insulating matrix and conductive powder dispersed therein. When the induced current flows through the conductive powder, due to the resistance of the powder, the electrical energy is converted into thermal energy, thereby heating the electric heating plate 630. The heated electric heater 630 transfers heat to the blade base layer 100 by heat conduction, thereby heating the entire fan blade to achieve the purpose of anti-icing, deicing or maintaining the temperature of the blade.

[0025] The present invention adopts a wireless power supply method, which avoids the cumbersomeness and safety hazards of cables in traditional wired power supply methods, and improves the reliability and flexibility of the system. The electric heating plate 630 in the electric heating functional layer 600 can quickly convert electrical energy into thermal energy, has high heating efficiency, can quickly respond to environmental changes, and effectively prevent blades from freezing. The wireless sensing layer 500 and the electric heating functional layer 600 are cleverly integrated into the blade base layer 100, and will not significantly change the aerodynamic shape of the blade, and have little effect on the aerodynamic characteristics of the fan operation. Due to the use of wireless power supply, the maintenance cost of the system is low, and it is easy to troubleshoot and repair. The wireless induction heating method does not require the combustion of fossil fuels, reduces environmental pollution and carbon emissions, and meets the requirements of environmental protection and sustainable development. By preventing blades from freezing and maintaining blade temperature, the present invention can reduce the load on the fan blades and improve the operating efficiency and wind energy utilization of the fan.

[0026] Reference Figure 2 In the present invention, the layer structure of the wireless induction heating fan blade includes an insulating bearing layer 510, a voltage induction coil 520, a first insulating layer 610, a second insulating layer 640, an electrode 620, and a heating plate 630. The heating plate 630 includes an insulating matrix and conductive powder dispersed in the insulating matrix, so that the heating plate 630 serves as a basis for heating.

[0027] Specifically, the external wireless power supply rail 300 is internally provided with a transmitting induction coil 400 and a power line, and a variable current is applied to the transmitting induction coil 400 through the power line. Through the interaction between the external wireless power supply transmitting device and the wireless induction heating fan blades, the voltage in the voltage induction coil 520 is obtained through the transmitting induction coil, and the electric heating sheet 630 is used as the basis for heating.

[0028] The working principle of the wireless induction heating fan blade in the present invention is mainly based on the electromagnetic induction principle and the electric heat conversion principle. The wireless power supply rail 300 of the part is internally provided with a transmitting induction coil 400 and a power line. A changing current is applied to the transmitting induction coil 400 through the power line, thereby generating a changing magnetic field around it. The voltage induction coil 520 on the fan blade is in this changing magnetic field. According to Faraday's law of electromagnetic induction, an induced current will be generated in the voltage induction coil 520. The electric heating plate 630 is the basis for heating, which is composed of an insulating matrix and conductive powder dispersed therein. When the induced current passes through the conductive powder in the electric heating plate 630, due to the resistance of the powder, the electrical energy is converted into thermal energy, thereby heating the electric heating plate 630. The heated electric heating plate 630 transfers heat to other parts of the blade by heat conduction, thereby achieving the purpose of heating the blade.

[0029] The present invention adopts a wireless power supply method, avoiding the cumbersomeness and safety hazards of cables in traditional wired power supply methods. The arrangement of the wireless power supply rail 300 and the transmitting induction coil 400 makes the structure of the entire system more concise and compact. The electric heater 630 can quickly convert electrical energy into thermal energy, and has high heating efficiency. Since the induced current is generated instantly, the heating of the electric heater 630 is also instantaneous, and can respond quickly to environmental changes. The median diameter selection range of the conductive powder is between 5nm and 50nm, which can ensure a good degree of bonding between the conductive powder and the insulating matrix. The preferred median diameter range is between 5nm and 20nm, at which time the dispersion and bonding of the conductive powder are better, and the heating effect is more significant. The layer structure of the wireless induction heating fan blade is cleverly integrated inside the blade, and will not significantly change the aerodynamic shape of the blade.

[0030] Therefore, the impact on the aerodynamic characteristics of the wind turbine is small, ensuring the normal operation and power generation efficiency of the wind turbine. Due to the wireless power supply method, the maintenance cost of the system is low. There is no need to regularly inspect and maintain the cables, which reduces the operation and maintenance costs. The wireless induction heating method does not require the burning of fossil fuels, reducing environmental pollution and carbon emissions. It meets the requirements of environmental protection and sustainable development, and is conducive to promoting the green development of the wind power industry.

[0031] In one embodiment, the median diameter of the conductive powder is selected to be in the range of 5 nm to 50 nm.

[0032] In this embodiment, the particle size of the conductive powder can ensure a good bonding between the conductive powder and the insulating matrix, and at the same time, its resistance is moderate, which can achieve a good heating effect. Preferably, the median diameter of the conductive powder is selected in the range of 5nm to 20nm, and its dispersion and bonding are good.

[0033] In one embodiment, the volume ratio of the conductive powder to the insulating matrix is ​​between 1:20 and 1:1.

[0034] In this embodiment, the volume ratio of the conductive powder to the insulating matrix is ​​used to limit the proportion of the conductive powder, so as to ensure a good bonding effect and resistance effect. Preferably, the volume ratio of the conductive powder to the insulating matrix is ​​between 1:20 and 1:10.

[0035] In one embodiment, the material of the insulating bearing 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; The material of the first insulating layer 610 and the second insulating layer 640 includes any one of polyethylene terephthalate (PET), polyimide (PI), polyurethane (PU), and ethylene vinyl acetate (EVA), or a combination of at least two thereof; The conductive powder includes any one of nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes, or a combination of at least two of them.

[0036] This embodiment provides possible selections of the insulating bearing layer 510 , the first insulating layer 610 , the second insulating layer 640 , the conductive powder, and the organic solvent that have been verified through experiments.

[0037] In one embodiment, the weight percentage of the insulating matrix in the heating plate 630 is 5-15, and the weight percentage of the conductive powder is 1-15.

[0038] In this embodiment, preferred selection and weight fraction of insulating substrate and preferred selection and weight fraction of conductive powder are given. The above material selection and weight fraction can achieve the working effect of the electric heater 630.

[0039] In one embodiment, the thickness of the heating plate is 50-200 μm.

[0040] In this embodiment, an optimal thickness of the heating plate 630 is provided to meet the requirements of heat generation and facilitate processing.

[0041] In one embodiment, the insulating carrier layer 510 , the first insulating layer 610 , and the second insulating layer 640 are made of polyimide.

[0042] The above uniform material selection simplifies the processing and enhances the bonding between the external packaging layer 3 and the insulating layer 230 .

[0043] The present invention also provides a method for preparing a wireless induction heating fan blade, comprising: Weigh 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve to obtain a polymer solution, weigh 1 to 15 parts of conductive powder and add them to the polymer solution, and stir them thoroughly to obtain a slurry of the electric heater 630; The slurry of the electric heater 630 is placed on the surface of the second insulating layer 640 and cured at high temperature; The electrode 620 is disposed on the surface of the electric heating plate 630 away from the second insulating layer 640; The first insulating layer 610 is disposed on the surface of the electric heating plate 630 away from the second insulating layer 640 to form an electric heating functional layer 600; A voltage induction coil 520 is disposed on the outer surface of the first insulating layer 610, and the voltage induction coil 520 is electrically connected to the electrode 620; An insulating bearing layer 510 is disposed on a side of the voltage induction coil 520 away from the first insulating layer 610; The wireless heating battery current collector can be prepared through the above process.

[0044] The method for preparing wireless induction heating fan blades provided by the present invention is mainly based on the preparation of the electric heater and the assembly of the layer structure. First, the organic polymer binder is dissolved in an organic solvent to form a polymer solution. Then, the conductive powder is added to the polymer solution and stirred evenly to form a slurry of the electric heater. Next, the slurry is coated or arranged on the surface of the second insulating layer 640, and the polymer binder is cured by high temperature curing to form the electric heater 630.

[0045] An electrode 620 is disposed on the surface of the electric heater 630 away from the second insulating layer 640 for electrical connection with an external power source or an induction coil. A first insulating layer 610 is disposed on the outer surface of the electrode 620 and the electric heater 630 to protect the electric heater and the electrode from environmental corrosion. A voltage induction coil 520 is disposed on the outer surface of the first insulating layer 610, and the voltage induction coil 520 is electrically connected to the electrode 620. In this way, when the external wireless power transmitting device generates a changing magnetic field, an induced current is generated in the voltage induction coil 520, and then flows into the electric heater 630 through the electrode 620 to generate heat. Finally, an insulating bearing layer 510 is disposed on the side of the voltage induction coil 520 away from the first insulating layer 610 to provide additional support and protection.

[0046] The preparation method provided by the present invention has clear steps, simple operation, and is easy to realize industrial production. A fan blade with wireless induction heating function can be prepared by coating, curing and assembling. The electric heater 630 is composed of an organic polymer binder, a conductive powder and an insulating layer, and has good conductivity, thermal stability and mechanical strength. The particle size and distribution of the conductive powder are controllable, so that the heating effect of the electric heater is more uniform and efficient. The layers are tightly combined, the layer structure is compact, and the aerodynamic shape of the blade is not significantly changed. The normal operation and power generation efficiency of the fan blade are guaranteed. The wireless power supply method is adopted to avoid the cumbersomeness and safety hazards of the cable in the traditional wired power supply method. The reliability and safety of the system are improved. Due to the wireless power supply method, the maintenance cost of the system is low. There is no need to regularly inspect and maintain the cable, which reduces the operation and maintenance cost. The wireless induction heating method does not require the burning of fossil fuels, reducing environmental pollution and carbon emissions. It meets the requirements of environmental protection and sustainable development.

[0047] In one embodiment, a method for preparing a wireless induction heating fan blade comprises: Weigh 5 to 15 parts of organic polymer binder by mass and add them to 80 to 90 parts of organic solvent to dissolve to obtain a polymer solution, weigh 1 to 15 parts of conductive powder and add them to the polymer solution, and stir them thoroughly to obtain a slurry of the electric heater 630; The slurry of the electric heater 630 is placed on the surface of the second insulating layer 640 and cured at high temperature to form the electric heater 630; The electrode 620 is disposed on the surface of the electric heating plate 630 away from the second insulating layer 640; The first insulating layer 610 is disposed on the surface of the electric heating plate 630 away from the second insulating layer 640 to form an electric heating functional layer 600; A voltage induction coil 520 is disposed on the outer surface of the first insulating layer 610, and the voltage induction coil 520 is electrically connected to the electrode 620; An external insulating bearing layer 510 is disposed on a side of the voltage induction coil 520 that is away from the first insulating layer 610; The wind blade base layer 100 is arranged on the outer surface of the insulating bearing layer 510 .

[0048] In this embodiment, a processing method of the electrode 620 is proposed, which improves the processing convenience of the electrode 620, the bonding degree and electrical connection between the electrode 620 and the electric heater 630, and avoids multiple drying processes.

[0049] Furthermore, the material of the insulating bearing layer 510 includes any one of polyethylene terephthalate PET, polyimide PI, polyurethane PU, ethylene vinyl acetate EVA, or a combination of at least two thereof; The material of the first insulating layer 610 and the second insulating layer 640 includes any one of polyethylene terephthalate PET, polyimide PI, polyurethane PU, and ethylene vinyl acetate EVA, or a combination of at least two thereof; The conductive powder includes any one of nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes, or a combination of at least two thereof; The organic solvent includes any one of N-dimethylpyrrolidone, N,N-dimethylformamide or N,N-dimethylacetamide, or a combination of at least two thereof.

[0050] The wireless power supply rail 300 is internally provided with a transmitting induction coil 400 and a power line, and a variable current is applied to the transmitting induction coil 400 through the power line. Through the interaction between the external wireless power supply transmitting device and the wireless induction heating fan blades, the voltage in the voltage induction coil 520 is obtained through the transmitting induction coil, and the electric heating sheet 630 is used as the basis for heating. The use of wireless charging electromagnetic induction technology can effectively solve the problem of ice covering the fan blades, reduce the load on the fan blades, improve the utilization rate of wind energy, and increase the economic benefits of wind power generation.

[0051] Embodiment 1: A wireless induction heating fan blade, the specific material composition and steps during implementation are: (1) Dissolve 5 parts by weight of thermoplastic polyurethane particles (insulating matrix raw material) in 80 parts by weight of NN dimethyl pyrrolidone solution and mechanically stir at 60°C to form a TPU-NMP solution; (2) adding 15 parts by weight of conductive carbon black to the TPU-NMP solution prepared in step (1), and mixing the conductive carbon black and the TPU-NMP solution uniformly by mechanical stirring to form a slurry for the heating plate 630; (3) The slurry of the electric heater 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (the second insulating layer 640), and dried at 60°C for 8 hours, and then cured at high temperature to form the electric heater 630; (4) placing the copper electrode (electrode 620) on the surface of the electric heating plate 630 in step (3), and sealing a layer of polyimide film (first insulating layer 610) on the surface of the electric heating film to form an electric heating functional layer 600; (5) A voltage induction coil 520 is installed on one side of the electrothermal functional layer 600 prepared in step (4), and 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, and the thickness of the insulating bearing layer 510 is 40 μm, thereby obtaining a wireless induction heating fan blade.

[0052] Reference Figure 2, is the electric heating curve of the wireless induction heating fan blade in this embodiment. In an environment of normal temperature and pressure, and relative humidity not exceeding 50%, the experimental conditions are: the wireless power supply transmitter is 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 blade is 5-20cm.

[0053] The infinitely heated fan blade obtained in this embodiment can quickly reach a constant temperature state within 100 s when a voltage of 12 V is applied, and the constant temperature can reach 65°C.

[0054] Example 2 A wireless induction heating fan blade, the specific material composition and steps during implementation are: (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 mechanically stir at 70°C to form a PEO-DMF solution; (2) adding 10 parts by weight of nano silver powder to the PEO-DMF solution prepared in step (1), and mixing the nano silver powder and the PEO-DMF solution uniformly by mechanical stirring to form a slurry for the heating plate 630; (3) The slurry of the electric heater 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (the second insulating layer 640), and dried at 70°C for 10 h, and then cured at high temperature to form the electric heater 630; (4) placing the copper electrode (electrode 620) on the surface of the electric heating plate 630 in step (3), and sealing a layer of polyimide film (first insulating layer 610) on the surface of the electric heating film to form an electric heating functional layer 600; (5) A voltage induction coil 520 is installed on one side of the electrothermal functional layer 600 prepared in step (4), and 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, and the thickness of the insulating bearing layer 510 is 60 μm, thereby obtaining a wireless induction heating fan blade.

[0055] The infinitely heated fan blade 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°C.

[0056] Example 3 A wireless induction heating fan blade, the specific material composition and steps during implementation are: (1) Dissolve 13 parts by weight of polypropylene particles (insulating matrix raw material) in 85 parts by weight of N-N-dimethylacetamide solution and mechanically stir at 80°C to form a PP-DMAC solution; (2) adding 13 parts by weight of nano iron powder and nano aluminum powder to the PP-DMAC solution prepared in step (1), and mixing the nano iron powder and nano aluminum powder with the PP-DMAC solution by mechanical stirring to form a slurry for the electric heater 630; (3) The slurry of the electric heater 630 prepared in step (2) is uniformly coated on the polyimide film (the second insulating layer 640), and dried at 65° C. for 12 h, and then cured at high temperature to form the electric heater 630; (4) placing the copper electrode (electrode 620) on the surface of the electric heating plate 630 in step (3), and sealing a layer of polyimide film (first insulating layer 610) on the surface of the electric heating film to form an electric heating functional layer 600; (5) A voltage induction coil 520 is installed on one side of the electric heating functional layer 600 prepared in step (4), and 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, and the packaging thickness of the insulating bearing layer 510 is 50 μm, thereby obtaining a wireless induction heating fan blade.

[0057] The infinitely heated fan blade 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°C.

[0058] Example 4 A wireless induction heating fan blade, the specific material composition and steps during implementation are: (1) Dissolve 7 parts by weight of polyethylene particles (insulating matrix raw material) in 90 parts by weight of NN dimethyl pyrrolidone solution and mechanically stir at 85°C to form a PE-NMP solution; (2) adding 3 parts by weight of conductive carbon black and carbon nanotubes to the PE-NMP solution prepared in step (1), and uniformly mixing the conductive carbon black and carbon nanotubes with the PE-NMP solution by mechanical stirring to form a slurry of the heating plate 630; (3) The slurry of the electric heater 630 prepared in step (2) is uniformly coated on the surface of the polyimide film (the second insulating layer 640), and dried at 65°C for 12 hours, and then cured at high temperature to form the electric heater 630; (4) placing the copper electrode (electrode 620) on the surface of the electric heating plate 630 in step (3), and sealing a layer of polyimide film (first insulating layer 610) on the surface of the electric heating film to form an electric heating functional layer 600; (5) A voltage induction coil 520 is installed on the other side of the electrothermal functional layer 600 prepared in step (4), and 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, and the packaging thickness of the insulating bearing layer 510 is 65 μm, so that an insulating bearing layer 510 is obtained.

[0059] The infinitely heated fan blade obtained in this embodiment can quickly reach a constant temperature state within 50 seconds when a voltage of 16 V is applied, and the constant temperature can reach 95°C.

[0060] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A wireless induction heating fan blade, characterized in that: include: A blade base layer (100), a wind power generation column (200), a guide rail (300) and a transmitting induction coil (400), wherein the blade base layer is provided with a wireless induction layer (500) and an electric heating function layer (600) in sequence from the inside to the outside, and the guide rail (300) is embedded in the wind power generation column (200) and has a transmitting induction coil (400) arranged inside.

2. The wireless induction heating fan blade according to claim 1, characterized in that: The electrothermal functional layer (600) comprises a first insulating layer (610), a second insulating layer (640), an electrode (620) and an electric heating plate (630), wherein the electrode (620) is exposed on the outer surface of the electric heating plate (630), the electric heating plate (630) comprises an insulating matrix and conductive powder dispersed in the insulating matrix, and the first insulating layer (610) and the second insulating layer (640) are respectively arranged on the outer surfaces of the electrode (620) and the electric heating plate (630).

3. The wireless induction heating fan blade according to claim 2, characterized in that: The wireless induction layer (500) comprises an insulating bearing layer (510) and a voltage induction coil (520); the insulating bearing layer (510) combines the voltage induction coil (520) with the electrothermal functional layer (600); the voltage induction coil (520) is arranged 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 bearing layer (510) includes any one of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate, or a combination of at least two thereof; The material of the first insulating layer (610) and the second insulating layer (640) includes any one of polyethylene terephthalate, polyimide, polyurethane, and ethylene vinyl acetate, or a combination of at least two thereof; The insulating matrix includes any one of thermoplastic polyurethane, polyethylene oxide, polypropylene, polyethylene, and polyethersulfone, or a combination of at least two thereof; The conductive powder includes any one of nano silver powder, nano aluminum powder, nano iron powder, graphene, conductive carbon black, and carbon nanotubes, or a combination of at least two of them.

5. The wireless induction heating fan blade according to claim 2, characterized in that: The weight percentage of the insulating matrix in the electrothermal functional layer (600) is 5 to 15, and the weight percentage of the conductive powder is 1 to 15.

6. The wireless induction heating fan blade according to claim 1, characterized in that: The electrothermal functional layer (600) has a thickness of 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 in the range of 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 matrix is ​​between 1:20 and 1:

1.

9. A method for preparing wireless induction heating fan blades, characterized in that: include: Weighing 5 to 15 parts of an organic polymer binder by weight and adding them to 80 to 90 parts of an organic solvent to dissolve to obtain a polymer solution, weighing 1 to 15 parts of a conductive powder and adding them to the polymer solution, and stirring them thoroughly to obtain a slurry of an electric heating functional layer (600); The slurry of the electric heating functional layer (600) is disposed on the surface of the insulating layer (640) and cured at high temperature to form the electric heating plate (630); The electrode (620) is arranged on a surface of the electric heating plate (630) facing away from the insulating layer (640); A first insulating layer (610) is provided on a surface of the electric heating sheet (630) facing away from the insulating layer (640) to form an electric heating functional layer (600); A voltage induction coil (520) is arranged on the outer surface of the first insulating layer (610), and the voltage induction coil (520) is electrically connected to the electrode (620); An external insulating bearing layer (510) is provided on a side of the voltage induction coil (520) facing away from the first insulating layer (610); The fan blade base layer (100) is arranged on the outer surface of the insulating bearing layer (510).

10. The method according to claim 9, characterized in that The organic solvent includes any one of N-methylpyrrolidone, N,N-dimethylformamide or N,N-dimethylacetamide, or a combination of at least two thereof.

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