Fan blade suitable for gas heat deicing and using method thereof
By setting flow guiding components and exhaust hole structures inside the blade plate, the problem of uneven hot air distribution is solved, achieving uniform heating and efficient de-icing of the blade plate, improving the de-icing effect and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-04-07
AI Technical Summary
Existing gas-thermal de-icing technology lacks an active flow guiding structure, resulting in uneven distribution of hot airflow. This makes it impossible to uniformly heat the front and rear edge areas of the blade plate, leading to inconsistent de-icing effects and incomplete de-icing in some areas.
A flow guiding assembly is installed inside the blade plate, including a first, second, third, and fourth arc plate and a middle partition plate, forming a fishbone-like structure to separate and guide the hot airflow, making it uniformly fill the cavity, and achieving directional jet de-icing through the exhaust hole and exhaust pipe structure.
This achieves uniform contact between the hot airflow and the inner wall of the blade plate, improves de-icing efficiency, ensures rapid de-icing of critical parts, and reduces transmission resistance and energy consumption.
Smart Images
Figure CN121803391A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wind turbine blade technology, and more specifically, to a wind turbine blade suitable for gas-heat de-icing and its application method. Background Technology
[0002] Currently, the safest de-icing technology for wind turbine blades is gas-thermal de-icing. Its principle involves installing a blower and heating system inside the blade root. Cold air is heated and blown towards the blade tip. Utilizing the natural channel formed between the inner web and outer faceplate of the blade, hot air is blown in from the leading edge of the blade, reaching the blade tip. Through process holes at the blade tip, it reaches the trailing edge channel and the channel between the two web layers, returning along these two channels to the blade root. There, it is drawn in by the blower system, reheated, and blown out, forming a circulating airflow and heating system. This increases the air temperature inside the blade, heating the inner surface of the blade, which is then conducted to the outer surface, raising the temperature of the outer surface above 0°C, thus achieving both anti-icing and de-icing.
[0003] Current air-heat de-icing technology relies on the natural cavity inside the blade plate for airflow guidance, lacking an active airflow guidance structure. This results in uneven distribution of hot airflow, easily forming dead zones, and failing to transfer heat evenly and fully to the inner surface of the blade plate, especially the leading and trailing edge areas of the blade plate. Consequently, the de-icing effect is inconsistent and local de-icing is incomplete.
[0004] Therefore, we have made improvements to this and proposed a fan blade suitable for gas-heated de-icing and its usage method. Summary of the Invention
[0005] In view of the above-mentioned problems in the existing technology, the purpose of the present invention is to provide a fan blade suitable for gas-heat de-icing and its usage method.
[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A fan blade suitable for gas-heated de-icing includes a blade plate, a blade root at the tail end of the blade plate, a cavity in the inner wall of the blade plate, a trailing edge web on one side of the cavity, a leading edge web on the other side of the cavity, a flow guiding assembly in the cavity, the flow guiding assembly including a plurality of first arc plates uniformly distributed and fixedly installed on one side of the trailing edge web, a plurality of second arc plates uniformly distributed on one side of the leading edge web, and the upper and lower ends of the first and second arc plates being installed on the inner wall of the cavity, a partition plate in the middle of the cavity, a plurality of third arc plates uniformly distributed and fixedly connected in a straight line on one side of the partition plate, a plurality of fourth arc plates uniformly distributed and fixedly connected in a straight line on the other side of the partition plate, and a heating assembly at the blade root.
[0007] As a preferred technical solution of this application, the third arc plate, the fourth arc plate and the middle partition plate form a fishbone-like structure in the cavity of the blade plate to support the blade plate. One end of the third arc plate is located between two adjacent first arc plates, and one end of the fourth arc plate is located between two adjacent second arc plates.
[0008] As a preferred technical solution of this application, an exhaust hole is provided between several second arc plates and penetrates the blade plate. The exhaust hole is located on one side of the leading edge web plate, and an exhaust pipe is fixedly installed inside the exhaust hole.
[0009] As a preferred technical solution of this application, a baffle is provided on one side of the inner wall of the exhaust pipe, and a square hole is provided on the surface of the baffle near the blade plate.
[0010] As a preferred technical solution of this application, a semi-arc plate is fixedly connected to the other side of the inner wall of the exhaust pipe, an elastic hinge is provided on one side of the semi-arc plate, and a valve is provided at the other end of the elastic hinge.
[0011] As a preferred technical solution of this application, the heating assembly includes an inner cylinder fixedly installed at the blade root. A heating plate is fixedly connected to the inner wall of the inner cylinder near the blade plate. A shaft is fixedly connected to the middle of the heating plate. A pin is provided in the middle of the shaft. A fan blade is fixedly installed in the middle of the outer wall of the pin. A side groove ring frame is fixedly connected to the outer edge of the fan blade. A number of columnar balls are movably installed in a circumferentially evenly distributed manner on the inner wall of the side groove ring frame and are movably connected to the inner wall of the inner cylinder.
[0012] As a preferred technical solution of this application, a servo motor is fixedly connected to the other end of the pin shaft, and a frame is fixedly installed on the other end of the servo motor.
[0013] As a preferred technical solution of this application, the outer wall of the frame is uniformly distributed and fixedly connected with a number of protective nets, and the outer wall of the frame is fixedly installed on the inner wall of the inner cylinder.
[0014] As a preferred technical solution of this application, a flange is fixedly connected to the outer wall of the inner cylinder, and a number of mounting holes are evenly distributed on the surface of the flange.
[0015] A method for using fan blades suitable for gas-heated de-icing includes the following steps: S1. Hot airflow generation: The servo motor and heating plate located in the blade root are activated. The servo motor drives the pin shaft to rotate at high speed, which drives the fan blades fixed on it to rotate synchronously, generating the initial airflow. At the same time, the heating plate heats the air flowing over its surface in real time, converting mechanical wind into hot airflow. The side groove ring frame on the outer edge of the fan blade forms a rolling fit with the inner wall of the inner cylinder through its circumferentially distributed columnar balls, which constrains the rotation trajectory of the fan blade while minimizing sliding friction, thereby sending the hot airflow into the cavity inside the blade plate. S2. Flow guidance: After the hot air enters the cavity, it is first divided by the middle partition and enters the areas of the leading edge web and the trailing edge web respectively. Part of the hot air is sequentially guided by the third arc plate to the adjacent first arc plate, in the flow channel formed on the side of the trailing edge web. The other part of the hot air is sequentially guided by the fourth arc plate to the adjacent second arc plate, in the flow channel formed on the side of the leading edge web. The alternating guidance mechanism forces the hot air to fill all the sub-chambers separated by each arc plate in a zigzag path, and heats and de-ices the outer wall of the blade plate cavity. S3. De-icing: During the process of uniform heat distribution in the airflow, the gas flowing through the channel near the leading edge web acts on the valve in the exhaust pipe inside the exhaust port. After the inside is filled with hot air, the pressure pushes the valve to open against the torque of the elastic hinge. The hot airflow is then concentrated through the square hole on the baffle, forming a hot airflow that blows on the outer surface of the leading edge web to perform de-icing. Finally, the airflow after heat exchange is discharged in an orderly manner from the air hole preset at the tip of the blade plate.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention divides the cavity in the blade plate with a first arc plate, a second arc plate, a third arc plate, a fourth arc plate and a middle partition plate, guides and distributes the hot airflow from the blade root, so that it fills the entire blade plate cavity evenly and orderly and is finally discharged from the air hole, thereby improving the contact uniformity and coverage of the hot airflow with the inner wall of the blade plate, ensuring the uniformity of the de-icing heat distribution, and ultimately improving the overall de-icing efficiency. (2) The present invention drives the valve to open and close by the pressure of the hot air flow itself, so that the hot air flow is accelerated by the square hole to form a directional jet to de-ice the leading edge web plate. The structure is simple and reliable, and effectively ensures the rapid de-icing of key parts of the blade plate in the icing environment. (3) By installing the heating plate and fan blades in the inner cylinder of the blade root, and combining them with the low-friction rolling support structure composed of the side groove ring frame and columnar ball, the present invention achieves efficient generation and active delivery of hot airflow in a limited space. This structure not only greatly reduces transmission resistance and energy consumption, but also ensures rapid response and stable and reliable supply of de-icing hot air. Attached Figure Description
[0017] Figure 1 A schematic diagram of the overall structure of the fan blades suitable for gas thermal de-icing provided in this application; Figure 2 A partial structural diagram of a fan blade suitable for pneumatic de-icing provided in this application. Figure 1 ; Figure 3 A partial structural diagram of a fan blade suitable for pneumatic de-icing provided in this application. Figure 2 ; Figure 4 for Figure 3 Schematic diagram of the cross section at point AA; Figure 5 The schematic diagram of the blade root structure of the fan blade suitable for gas thermal de-icing provided in this application Figure 1 ; Figure 6 The schematic diagram of the blade root structure of the fan blade suitable for gas thermal de-icing provided in this application Figure 2 ; Figure 7 A schematic diagram of the exploded structure of the blade root in a fan blade suitable for gas thermal de-icing provided in this application; Figure 8 A partial cross-sectional view of the exhaust port structure in the fan blade suitable for pneumatic de-icing provided in this application. Figure 1 ; Figure 9 A partial cross-sectional view of the exhaust port structure in the fan blade suitable for pneumatic de-icing provided in this application. Figure 2 ; Figure 10 Internal airflow direction diagram of a fan blade suitable for pneumatic de-icing provided in this application; Figure 11 A flowchart illustrating the method of using the fan blades suitable for gas thermal de-icing provided in this application; In the diagram: 1. Blade plate; 2. Blade root; 3. Guide assembly; 301. First arc plate; 302. Second arc plate; 303. Middle partition plate; 304. Third arc plate; 305. Fourth arc plate; 306. Exhaust port; 307. Exhaust pipe; 308. Square hole; 309. Baffle; 310. Semi-arc plate; 311. Elastic hinge; 312. Valve; 4. Leading edge web plate; 5. Trailing edge web plate; 6. Mounting hole; 7. Heating assembly; 701. Inner cylinder; 702. Heating plate; 703. Frame; 704. Protective net; 705. Servo motor; 706. Pin shaft; 707. Shaft cylinder; 708. Side groove ring frame; 709. Columnar ball bearing; 710. Fan blade; 8. Flange. Detailed Implementation
[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0019] As described in the background section, the gas-heat de-icing technology lacks an active flow guiding structure and relies solely on the natural cavity of the blade plate, resulting in uneven distribution of hot airflow and insufficient heating of key areas such as the leading and trailing edges of the blade plate, leading to incomplete de-icing.
[0020] To solve this technical problem, the present invention provides a wind turbine blade suitable for gas thermal de-icing and its application method, which is applied to wind power generation fan blades.
[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0022] Example 1 Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 A fan blade suitable for gas-heated de-icing includes a blade plate 1, a blade root 2 at the tail end of the blade plate 1, a cavity in the inner wall of the blade plate 1, a trailing edge web 5 on one side of the cavity, a leading edge web 4 on the other side of the cavity, and a flow guiding assembly 3 within the cavity. The flow guiding assembly 3 includes a plurality of first arc plates 301 uniformly distributed and fixedly installed on one side of the trailing edge web 5, and a plurality of second arc plates 302 uniformly distributed on one side of the leading edge web 4, wherein the first arc plates 301 and the second arc plates 302 are... 2. Both the upper and lower ends are installed on the inner wall of the cavity. A partition plate 303 is provided in the middle of the cavity. Several third arc plates 304 are fixedly connected in a straight line evenly distributed on one side of the partition plate 303, and several fourth arc plates 305 are fixedly connected in a straight line evenly distributed on the other side of the partition plate 303. The third arc plates 304, fourth arc plates 305 and the partition plate 303 form a fishbone-like structure in the cavity of the blade plate 1 to support the blade plate 1. One end of the third arc plate 304 is located between two adjacent first arc plates. Between the plates 301, one end of the fourth arc plate 305 is located between two adjacent second arc plates 302. A heating component 7 is provided at the blade root 2. The airflow passes through the blade root 2 of the blade plate 1 and enters the cavity. The airflow is split and moves to both sides. Part of the airflow is guided by the third arc plate at the beginning of one side of the partition plate 303 and enters the space between two adjacent first arc plates 301. It continues to flow and is guided by the surface of the second third arc plate 304. It then flows again into the space between two adjacent first arc plates and exits through the air hole at the beginning of the blade plate 1. The other part of the airflow is guided by the fourth arc plate 305 at the beginning of the other side of the partition plate 303 and enters the space between two adjacent second arc plates 302. It continues to flow and is guided by the surface of the second fourth arc plate 305. It then flows again into the space between two adjacent second arc plates and exits through the air hole at the beginning of the blade plate 1. This allows the airflow to fill the cavity of the blade plate 1 evenly, ensuring the heating and de-icing effect of the blade plate 1.
[0023] By dividing the blade cavity in the blade plate 1 with the first arc plate 301, the second arc plate 302, the third arc plate 304, the fourth arc plate 305 and the middle partition plate 303, the hot airflow from the blade root 2 is guided and distributed, so that it fills the entire cavity of the blade plate 1 evenly and orderly and is finally discharged from the air hole. This significantly improves the uniformity of contact and coverage of hot air with the inner wall of the blade plate 1, ensures the uniformity of de-icing heat distribution, and ultimately improves the overall de-icing effect.
[0024] Furthermore, such as Figure 2 , Figure 8 and Figure 9 As shown, exhaust holes 306 are provided between several second arc plates 302, and penetrate through the blade plate 1. The exhaust holes 306 are located near one side of the leading edge web plate 4. An exhaust pipe 307 is fixedly installed inside the exhaust hole 306. A baffle 309 is provided on one side of the inner wall of the exhaust pipe 307. A square hole 308 is provided on the surface of the baffle 309 near the blade plate 1. A semi-arc plate 310 is fixedly connected to the other side of the inner wall of the exhaust pipe 307. An elastic hinge 311 is provided on one side of the semi-arc plate 310. A valve 312 is provided at the other end of the elastic hinge 311. Airflow enters two Between the second arc plate 302, it contacts the leading edge web plate 4 and enters the exhaust pipe 307 of the exhaust port 306. The pressure of the internal hot air flow pushes the valve 312. After the valve 312 is pushed, it squeezes the elastic hinge 311 to flip upward, opening the exhaust pipe 307 to pass through the square hole 308 of the baffle 309. The square hole 308 concentrates the hot air flow and blows it to the outer wall of the leading edge web plate 4. Since the leading edge web plate 4 is thin and long, it is a solid structure. The exhaust hot air flow is concentrated and blown in a direction onto the solid and easily icy surface of the leading edge web plate 4.
[0025] Example 2 The fan blades suitable for gas-thermal de-icing provided in Example 1 are further optimized, specifically, as follows: Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the heating assembly 7 includes an inner cylinder 701 fixedly installed at the blade root 2. A heating plate 702 is fixedly connected to the inner wall of the inner cylinder 701 near the blade plate 1. A shaft cylinder 707 is fixedly connected to the middle of the heating plate 702. A pin 706 is provided in the middle of the shaft cylinder 707. A fan blade 710 is fixedly installed in the middle of the outer wall of the pin 706. A side groove ring frame 708 is fixedly connected to the outer edge of the fan blade 710. A number of columnar balls 709 are movably installed in a circumferentially evenly distributed manner on the inner wall of the side groove ring frame 708 and are movably connected to the inner wall of the inner cylinder 701. A flange 8 is fixedly connected to the outer wall of the inner cylinder 701. The surface of the flange 8 is circumferentially evenly distributed. A number of mounting holes 6 are evenly distributed. The mounting holes 6 in the flange 8 are used to engage with bolts to position and install the flange on the wind turbine. The servo motor 705 and the heating plate 702 are started. During operation, the heating plate 702 heats the surrounding air. The servo motor 705 drives the pin shaft 706 to rotate, which in turn drives the fan blade 710 to rotate and generate airflow. This airflow forms a hot airflow after passing through the heating area. The columnar balls 709 required by the side groove ring frame 708 on the outer wall of the fan blade 710 are driven to roll on the inner wall of the inner cylinder 701. This reduces friction while restricting the rotation of the fan blade 710.
[0026] By installing the heating plate 702 and the fan blade 710 in the inner cylinder 701 of the blade root 2, and combining them with the low-friction rolling support structure formed by the side groove ring frame 708 and the columnar ball bearing 709, the efficient generation and active delivery of hot airflow are achieved in a limited space. This structure not only significantly reduces transmission resistance and energy consumption, but also ensures rapid response and stable and reliable supply of de-icing hot air.
[0027] Furthermore, such as Figure 6 and Figure 7 As shown, a servo motor 705 is fixedly connected to the other end of the pin 706, and a frame 703 is fixedly installed on the other end of the servo motor 705. The frame 703 is used to fix the servo motor 705 and increase the stability of the servo motor 705 during rotation.
[0028] Furthermore, such as Figure 5 and Figure 6 As shown, several protective nets 704 are fixedly connected to the outer wall of the frame 703 in a circumferentially even distribution, and the outer wall of the frame 703 is fixedly installed on the inner wall of the inner cylinder 701. The protective nets 704 installed in the frame 703 filter the airflow entering the blade plate 1, preventing the airflow from carrying impurities into the blade plate 1, which increases the weight of the blade plate 1 and affects the balance of the servo motor 705 during the rotation process.
[0029] Please refer to Figure 11 A fan blade suitable for gas-heated de-icing and its usage method include the following steps: S1. Hot airflow generation: The servo motor 705 and heating plate 702 located in the blade root 2 are activated. The servo motor 705 drives the pin shaft 706 to rotate at high speed, which drives the fan blade 710 fixed on it to rotate synchronously, generating an initial airflow. At the same time, the heating plate 702 heats the air flowing over its surface in real time, converting mechanical wind into hot airflow. The side groove ring frame 708 on the outer edge of the fan blade 710 forms a rolling fit with the inner wall of the inner cylinder 701 through its circumferentially distributed columnar balls 709, which constrains the rotation trajectory of the fan blade 710 while minimizing sliding friction, thereby sending the hot airflow into the cavity inside the blade plate 1. S2. Flow Guidance: After the hot airflow enters the cavity, it is first diverted by the partition plate 303, entering the areas of the front edge web 4 and the rear edge web 5 respectively. A portion of the hot airflow is sequentially guided by the third arc plate 304 to the adjacent first arc plate 301, located in the flow channel formed on the side of the rear edge web 5. Another portion of the hot airflow is sequentially guided by the fourth arc plate 305 to the adjacent second arc plate 302, located in the flow channel formed on the side of the front edge web 4. This alternating guidance mechanism forces the hot airflow to fill all the sub-chambers separated by each arc plate (e.g., ...) in a zigzag path. Figure 10 ), to heat and de-ice the outer wall of the cavity of blade plate 1; S3. De-icing: During the process of uniform heat distribution in the airflow, the pressure of the gas flowing through the flow channel near the leading edge web plate 4 acts on the valve 312 in the exhaust pipe 307 inside the exhaust port 306. After the inside is filled with hot air, the pressure pushes the valve 312 to open against the torque of the elastic hinge 311. The hot airflow is then concentrated through the square hole 308 on the baffle 309, forming a hot airflow that blows on the outer surface of the leading edge web plate 4 to perform de-icing. Finally, the airflow after heat exchange is discharged from the air hole preset at the tip of the blade plate 1.
[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0031] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.
Claims
1. A fan blade suitable for gas-heated de-icing, comprising a blade plate (1), wherein the blade plate (1) has a blade root (2) at its tail end, the inner wall of the blade plate (1) has a cavity, a trailing edge web plate (5) is provided on one side of the cavity, and a leading edge web plate (4) is provided on the other side of the cavity, characterized in that, The cavity is provided with a flow guiding component (3), which includes a number of first arc plates (301) evenly distributed and fixedly installed on one side of the rear edge web plate (5), and a number of second arc plates (302) evenly distributed on one side of the front edge web plate (4). The first arc plates (301) and the second arc plates (302) are installed on the inner wall of the cavity at both ends. A partition plate (303) is provided in the middle of the cavity. A number of third arc plates (304) are evenly distributed and fixedly connected on one side of the partition plate (303), and a number of fourth arc plates (305) are evenly distributed and fixedly connected on the other side of the partition plate (303). A heating component (7) is provided at the leaf root (2).
2. The fan blade suitable for gas-heated de-icing according to claim 1, characterized in that, The third arc plate (304), the fourth arc plate (305) and the middle partition plate (303) form a fishbone-like structure in the cavity of the blade plate (1) to support the blade plate (1). One end of the third arc plate (304) is located between two adjacent first arc plates (301), and one end of the fourth arc plate (305) is located between two adjacent second arc plates (302).
3. The fan blade suitable for gas-heated de-icing according to claim 2, characterized in that, A vent hole (306) is provided between several second arc plates (302) and penetrates the blade plate (1). The vent hole (306) is located on one side of the leading edge web plate (4), and an vent pipe (307) is fixedly installed inside the vent hole (306).
4. The fan blade suitable for gas-heated de-icing according to claim 3, characterized in that, The exhaust pipe (307) has a baffle (309) on one side of its inner wall, and the baffle (309) has a square hole (308) on the side of its surface near the blade plate (1).
5. The fan blade suitable for gas-heated de-icing according to claim 4, characterized in that, A semi-arc plate (310) is fixedly connected to the other side of the inner wall of the exhaust pipe (307). An elastic hinge (311) is provided on one side of the semi-arc plate (310), and a valve (312) is provided at the other end of the elastic hinge (311).
6. The fan blade suitable for gas-heated de-icing according to claim 1, characterized in that, The heating assembly (7) includes an inner cylinder (701) fixedly installed at the blade root (2). A heating plate (702) is fixedly connected to the inner wall of the inner cylinder (701) on the side near the blade plate (1). A shaft cylinder (707) is fixedly connected to the middle of the heating plate (702). A pin (706) is provided in the middle of the shaft cylinder (707). A fan blade (710) is fixedly installed in the middle of the outer wall of the pin (706). A side groove ring frame (708) is fixedly connected to the outer edge of the fan blade (710). A number of columnar balls (709) are movably installed in a circumferentially evenly distributed manner on the inner wall of the side groove ring frame (708) and are movably connected to the inner wall of the inner cylinder (701).
7. The fan blade suitable for gas-heated de-icing according to claim 6, characterized in that, The other end of the pin (706) is fixedly connected to a servo motor (705), and the other end of the servo motor (705) is fixedly mounted with a frame (703).
8. The fan blade suitable for gas-heated de-icing according to claim 7, characterized in that, The outer wall of the frame (703) is uniformly distributed around the circumference and fixedly connected with several protective nets (704), and the outer wall of the frame (703) is fixedly installed on the inner wall of the inner cylinder (701).
9. The fan blade suitable for gas-heated de-icing according to claim 6, characterized in that, The outer wall of the inner cylinder (701) is fixedly connected to a flange (8), and the surface of the flange (8) is provided with a number of mounting holes (6) evenly distributed around the circumference.
10. A method of using a fan blade suitable for gas-thermal de-icing, comprising using the fan blade suitable for gas-thermal de-icing as described in claim 9, characterized in that, Includes the following steps: S1. Hot airflow generation: Start the servo motor (705) and heating plate (702) located in the blade root (2). The servo motor (705) drives the pin shaft (706) to rotate at high speed, which drives the fan blade (710) fixed on it to rotate synchronously, generating initial airflow. At the same time, the heating plate (702) heats the air flowing over its surface in real time, converting mechanical wind into hot airflow. The side groove ring frame (708) on the outer edge of the fan blade (710) forms a rolling fit with the inner wall of the inner cylinder (701) through its circumferentially distributed columnar balls (709), which constrains the rotation trajectory of the fan blade (710) while minimizing sliding friction, thereby sending the hot airflow into the cavity inside the blade plate (1). S2, Flow guidance: After the hot air enters the cavity, the hot air is first divided by the middle partition (303) and enters the area of the front edge web (4) and the rear edge web (5) respectively. Part of the hot air is sequentially guided by the third arc plate (304) to the adjacent first arc plate (301) in the flow channel formed on the side of the rear edge web (5), and another part of the hot air is sequentially guided by the fourth arc plate (305) to the adjacent second arc plate (302) in the flow channel formed on the side of the front edge web (4). The alternating guidance mechanism forces the hot air to fill all the sub-cavities separated by each arc plate in a zigzag path to heat and de-ice the outer wall of the cavity of the blade plate (1). S3, De-icing: During the process of uniform heat distribution of the airflow, the gas flowing through the channel near the leading edge web (4) exerts its pressure on the valve (312) in the exhaust pipe (307) inside the exhaust hole (306). After the inside is filled with hot air, its pressure pushes the valve (312) to overcome the torque of the elastic hinge (311) and open. The hot airflow is then concentrated through the square hole (308) on the baffle (309) to form a hot airflow that blows on the outer surface of the leading edge web (4) to perform de-icing. Finally, the airflow after heat exchange is discharged in an orderly manner from the air hole preset at the tip of the blade plate (1).