Wind power blade hot air deicing device with temperature protection function

Abstract

The application relates to the technical field of wind-driven generators and discloses a wind power blade hot air deicing device with a temperature protection function, which comprises a rack, a cabin arranged at the top of the rack, a blade table arranged in front of the cabin, rotating blades arranged on the outer side of the blade table, the rotating blades comprising four parts of a front edge, a rear edge, a blade tip and a blade tail, and a heating assembly, wherein the heating assembly specifically comprises a heating pipeline and a backflow pipeline arranged in the rotating blades. The wind power blade hot air deicing device with the temperature protection function is characterized in that the heating assembly is arranged, hot air is blown into the heating pipeline from a hot air unit, and then the hot air returns to the hot air unit through the backflow pipeline, so that heat is transmitted to the rotating blades through the heating pipeline and the backflow pipeline, the ice layer on the outer side of the rotating blades is melted, the wind energy capturing efficiency of the rotating blades is prevented from being affected by the ice layer, the power generation efficiency of the equipment is reduced, and the service life of the rotating blades is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generators, in particular to a wind power blade hot air deicing device with temperature protection function. BACKGROUND

[0002] A wind power generator is a device that converts wind energy into electrical energy. Its core principle is to use wind power to drive the rotation of the wind wheel, which drives the rotation of the generator rotor. According to the law of electromagnetic induction, an induced electromotive force is generated in the stator winding of the generator. When the stator winding is connected to the external power grid, an electric current will be generated, thereby realizing the conversion of wind energy to electrical energy. For example, when the wind blows through the blades of the wind wheel, the airflow speed above and below the blades differs due to the wing design, and according to Bernoulli's principle, a pressure difference is generated on the upper and lower surfaces. This pressure difference causes the blade to be subjected to lift, driving the rotation of the wind wheel.

[0003] In the patent with the publication number CN217976474U, a circulating hot air deicing device for wind power is disclosed, which includes a wind power blade. The inner cavity of the wind power blade is fixedly installed with an installation plate. The upper surface of the installation plate is fixedly installed with an air pump at the front side. The upper surface of the installation plate is fixedly installed with a gas heating device at the rear side. The inner cavity of the wind power blade is fixedly installed with an air supply pipe. The inner cavity of the wind power blade is installed with an ultrasonic transmitter. The ultrasonic transmitter can vibrate to remove ice blocks attached to the surface of the wind power blade. By installing the air pump and the gas heating device at the root of the wind power blade, the air supply pipe is S-shaped and attached to the inner wall of the wind power blade and extends to the tip of the blade. The tip of the wind power blade can be heated more evenly, the heating of the entire wind power blade is more uniform, the time of hot air staying in the inner cavity of the blade is extended, and the air supply and heating power consumption of the gas heating device is reduced.

[0004] The existing technology has the following defects:

[0005] Since wind power generators are mostly built in high and windy areas, when the environmental temperature is below 0℃ and the air humidity is high, the blades of the wind power generator are prone to icing. The shape of the iced blade surface changes, the airfoil is damaged, the wind energy capture efficiency is greatly reduced, the resistance of the wind power generator increases, the starting wind speed increases, and the power generation is seriously affected. Moreover, the ice layer increases the load of the blade, causing fatigue damage, which may cause cracks, deformation or even breakage of the blade.

[0006] Due to the shape and size of the wind power generator blade, the leading edge and other parts of the blade under the impact of the airflow become high-risk areas for water droplets to accumulate and freeze. At the same time, the higher the rotational speed at the tip of the wind power generator blade, the lower the air pressure at the tip, and the faster the water vapor may accumulate, making icing more likely to occur. Due to the above reasons, the wind power generator blade surface is not uniformly covered with ice, which increases the difficulty of deicing work. SUMMARY

[0007] In view of the problem that the blades of the wind driven generator are prone to icing in the prior art, a hot air deicing device with temperature protection function for wind power blades is provided.

[0008] The present application provides a hot air deicing device with temperature protection function for wind power blades, which aims to remove the ice layer outside the blades of the wind driven generator.

[0009] The technical scheme of the present application is as follows: a hot air deicing device with temperature protection function for wind power blades, comprising a rack, a cabin arranged on the top of the rack, a blade platform arranged in front of the cabin, a rotating blade arranged outside the blade platform, the rotating blade comprising a leading edge, a trailing edge, a blade tip and a blade tail, and further comprising a heating assembly, the heating assembly specifically comprising a heating pipeline and a return pipeline arranged in the rotating blade.

[0010] The heating pipeline is laid on the inner wall of the leading edge, and the return pipeline is laid on the inner wall of the trailing edge; the heating pipeline and the return pipeline are connected at the blade tip, and the heating pipeline and the return pipeline extend out from the blade tail.

[0011] Further, the heating pipeline is laid by coiling, and gradually becomes sparse from the blade tail to the blade tip.

[0012] Further, the heating assembly further comprises a straight-through pipeline arranged in the rotating blade, the straight-through pipeline is laid on the inner wall of the leading edge, and a jump bridge is arranged at the joint of the straight-through pipeline and the heating pipeline.

[0013] Further, the heating assembly further comprises an embedded hole opened in the inner wall of the leading edge, an inner embedded plate arranged in the embedded hole, a mounting hole arranged on the surface of the inner embedded plate, an electric telescopic rod arranged in the mounting hole, a heating interface and a straight-through interface arranged outside the outer sleeve, an adjusting inner core arranged in the outer sleeve, an upper segment gap and a lower segment gap arranged outside the adjusting inner core, and a jack arranged at the end of the adjusting inner core close to the inner embedded plate.

[0014] The inner embedded plate is provided with a sensor, one end of the electric telescopic rod away from the inner embedded plate is screwed into the jack, the upper segment gap and the lower segment gap are communicated, the communication hole and the upper segment gap are communicated, the heating pipeline is connected at the two end openings of the straight-through interface, the jump bridge is connected at the two end openings of the heating interface, and the heating interface and the communication hole are communicated.

[0015] Further, the upper segment gap is butted against one end of the heating pipeline close to the blade tail, and the lower segment gap is butted against one end of the jump bridge close to the blade tail.

[0016] Further, a filtering assembly is further arranged in the rotating blade, the filtering assembly is located in the blade tail and seals the opening of the blade tail.

[0017] Further, the filter assembly specifically comprises two limiting tables arranged in the tail of the blade, a shell arranged between the two limiting tables, an inner liner arranged inside the shell, a filter diaphragm arranged inside the inner liner, a through hole arranged at the center of the limiting table, and a side opening arranged on the outer side of the shell.

[0018] The limiting table is provided with a groove on the side close to the shell, the through hole penetrates into the inner liner from both ends, and the inner connecting pipe and the outer connecting pipe penetrate through the through hole and are distributed at both ends of the filter diaphragm.

[0019] Further, the filter assembly further comprises a water leakage hole arranged on the outer side of the inner liner.

[0020] The shell and the inner liner are both spherical, a water storage space is arranged between the shell and the inner liner, and the water leakage hole is connected with the water storage space and the inner space of the inner liner.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. By arranging the heating assembly, when the outer side of the rotating blade is iced, the hot air blower set blows hot air from the heating pipeline, and then returns to the hot air blower set through the return pipeline, so that the heat is transferred to the rotating blade through the heating pipeline and the return pipeline, the ice layer on the outer side of the rotating blade is melted, so that the ice layer does not affect the wind energy capture efficiency of the rotating blade, the power generation efficiency of the equipment is reduced, and the service life of the rotating blade is prolonged. At the same time, the heating pipeline is coiled, so that the flow time of hot air at the leading edge is longer, the heat exchange is better, more heat is left at the leading edge, and better ice melting effect is achieved.

[0023] 2. By arranging the straight-through pipeline, according to the ice layer distribution on the outer side of the leading edge sensed by the sensor, the hot air flows from the heating pipeline at the place needing to be deiced, and the hot air flows into the straight-through pipeline at the place not needing to be deiced, so that more heat in the hot air is left in the required area, the waste of heat is avoided, better ice melting effect is achieved, and energy consumption is reduced.

[0024] 3. By arranging the filter assembly, the outer connecting pipe inputs hot air into the inner liner, the filter diaphragm filters the particulate matters and water vapor in the hot air, and the pure hot air is input into the straight-through pipeline through the inner connecting pipe, so that the particulate matters and water vapor can be avoided from entering the heating pipeline, the return pipeline and the straight-through pipeline, the heating pipeline, the return pipeline and the straight-through pipeline will not be corroded by the particulate matters and water vapor, the heat conduction efficiency can be maintained for a long time, and the service life can be prolonged. At the same time, the water vapor collected by the filter diaphragm falls into the inner liner and enters the water storage space, so that the accumulated water can be avoided from entering the outer connecting pipe or the inner connecting pipe. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1A three-dimensional diagram of a hot air deicing device for wind turbine blades with a temperature protection function according to the present invention;

[0026] Figure 2 A schematic diagram of a rotating blade of the present invention;

[0027] Figure 3 This is a schematic diagram of the interior of a rotating blade of the present invention;

[0028] Figure 4 This is a schematic diagram of the heating component of the present invention;

[0029] Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 6 For the present invention Figure 4 Middle partial enlarged view;

[0031] Figure 7 This is an enlarged view of the heating component of the present invention;

[0032] Figure 8 This is a disassembled diagram of the heating component of the present invention;

[0033] Figure 9 For the present invention Figure 8 Schematic diagram of perspective flip;

[0034] Figure 10 This is a plan view of the rotating blade of the present invention;

[0035] Figure 11 For the present invention Figure 10 Middle AA section view;

[0036] Figure 12 For the present invention Figure 10 Middle BB cross-section;

[0037] Figure 13 For the present invention Figure 12 Enlarged view of the filter assembly;

[0038] Figure 14 This is a disassembled diagram of the filter assembly of the present invention;

[0039] Figure 15 This is a schematic diagram of the interior of the liner of the present invention.

[0040] In the picture:

[0041] 1, rack; 2, cabin; 3, blade table; 4, rotating blade; 41, leading edge; 42, trailing edge; 43, blade tip; 44, blade tail; 5, heating assembly; 51, heating pipeline; 52, return pipeline; 53, straight-through pipeline; 54, jump bridge; 55, embedded hole; 56, embedded plate; 57, mounting hole; 58, electric telescopic rod; 59, adjusting inner core; 510, upper segment gap; 511, lower segment gap; 512, communication hole; 513, outer sleeve; 514, heating interface; 515, straight-through interface; 516, jack; 517, inner connector; 518, outer connector; 6, filter assembly; 61, limiting table; 62, shell; 63, inner liner; 64, filter diaphragm; 65, water leakage hole; 66, through hole; 67, side opening. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0043] Example 1, refer to Figures 1-12 For the first embodiment of the present application, a wind power blade hot air deicing device with temperature protection function is provided, which comprises a rack 1, a cabin 2 arranged at the top of the rack 1, a blade table 3 arranged in front of the cabin 2, a rotating blade 4 arranged outside the blade table 3, the rotating blade 4 comprising a leading edge 41, a trailing edge 42, a blade tip 43 and a blade tail 44, and further comprising a heating assembly 5, the heating assembly 5 specifically comprising a heating pipeline 51 and a return pipeline 52 arranged inside the rotating blade 4.

[0044] Specifically, the rack 1 is fixed to the ground, the cabin 2 is welded with the rack 1, the blade table 3 is rotationally connected with the cabin 2, the rotating blade 4 is fixed with the blade table 3 through bolts, the inside of the blade table 3 is provided with a hot air unit, the heating assembly 5 is connected with the hot air unit, the heating pipeline 51 is laid on the inner wall of the leading edge 41, the return pipeline 52 is laid on the inner wall of the trailing edge 42, the heating pipeline 51 and the return pipeline 52 are connected at the blade tip 43, and the heating pipeline 51 and the return pipeline 52 extend out from the blade tail 44; the heating pipeline 51 adopts a coiled laying method and gradually becomes sparse from the blade tail 44 to the blade tip 43.

[0045] By setting the heating assembly 5, when the outer side of the rotating blade 4 is iced, the hot air blower set blows hot air from the heating pipe 51 into the return pipe 52, and then back to the hot air blower set, so that heat is transferred to the rotating blade 4 through the heating pipe 51 and the return pipe 52, so that the ice layer on the outer side of the rotating blade 4 is melted, so as to avoid the influence of the ice layer on the wind energy capture efficiency of the rotating blade 4, reduce the power generation efficiency of the equipment, and prolong the service life of the rotating blade 4. At the same time, the heating pipe 51 is coiled, so that the flow time of hot air at the leading edge 41 is longer, the heat exchange can be better, more heat can be left at the leading edge 41, and better ice melting effect can be achieved.

[0046] The heating assembly 5 further comprises a straight-through pipe 53 arranged in the rotating blade 4, the straight-through pipe 53 is laid on the inner wall of the leading edge 41, the intersection of the straight-through pipe 53 and the heating pipe 51 is provided with a jump bridge 54, and the two ends of the heating pipe 51 and the straight-through pipe 53 are communicated; an embedded hole 55 is opened in the inner wall of the leading edge 41, an inner embedded plate 56 and an outer sleeve 513 are arranged inside the embedded hole 55, a mounting hole 57 is arranged on the surface of the inner embedded plate 56, an electric telescopic rod 58 is arranged inside the mounting hole 57, a heating interface 514 and a straight-through interface 515 are arranged on the outer side of the outer sleeve 513, an adjusting inner core 59 is arranged inside the outer sleeve 513, an upper segment gap 510, a lower segment gap 511 and a communication hole 512 are arranged on the outer side of the adjusting inner core 59, and a plug hole 516 is arranged on the end of the adjusting inner core 59 close to the inner embedded plate 56.

[0047] Specifically, the inner embedded plate 56 is threadedly connected into the embedded hole 55, a sensor is arranged in the inner embedded plate 56, the sensor can sense the ice layer coverage condition on the outer side of the leading edge 41 through infrared rays or temperature, the electric telescopic rod 58 is threadedly connected into the mounting hole 57, one end of the electric telescopic rod 58 away from the inner embedded plate 56 is threadedly connected into the plug hole 516, the electric telescopic rod 58 is slidingly inserted into the outer sleeve 513, the outer sleeve 513 is fixed with the inner embedded plate 56 through bolts, the upper segment gap 510 is communicated with the lower segment gap 511, the communication hole 512 is communicated with the upper segment gap 510, the heating pipe 51 is connected at the two end openings of the straight-through interface 515, the jump bridge 54 is connected at the two end openings of the heating interface 514, the heating interface 514 is communicated with the communication hole 512, the upper end gap 510 is butted at one end of the heating pipe 51 close to the blade tail 44, and the lower segment gap 511 is butted at one end of the jump bridge 54 close to the blade tail 44.

[0048] By arranging the straight-through pipe 53, according to the ice layer distribution condition on the outer side of the leading edge 41 sensed by the sensor, hot air flows from the heating pipe 51 at the place needing to be deiced, and hot air flows into the straight-through pipe 53 at the place not needing to be deiced, so that more heat in the hot air is left in the required area, the waste of heat can be avoided, better ice melting effect can be achieved, and energy consumption is reduced.

[0049] Embodiment 2, reference Figures 1-7 and Figures 10-15 As a second embodiment of the present application, which is different from the first embodiment, the rotating blade 4 is further provided with a filtering assembly 6, which is located in the blade tail 44 and closes the opening of the blade tail 44.

[0050] The filtering assembly 6 specifically includes two limiting tables 61 arranged in the blade tail 44, an outer shell 62 arranged between the two limiting tables 61, an inner liner 63 arranged inside the outer shell 62, a filtering diaphragm 64 arranged inside the inner liner 63, a through hole 66 arranged at the center of the limiting table 61, and a side opening 67 arranged on the outer side of the outer shell 62. The heating assembly 5 further includes an inner connecting pipe 517 and an outer connecting pipe 518. The filtering assembly 6 further includes a water leakage hole 65 arranged on the outer side of the inner liner 63.

[0051] Specifically, the limiting table 61 is fixed in the leading edge 41 by bolts, and the side of the limiting table 61 close to the outer shell 62 is provided with a recess, the outer shell 62 is embedded in the recess, the through hole 66 penetrates from both ends to the inner liner 63, the inner connecting pipe 517 and the outer connecting pipe 518 penetrate the through hole 66 and are distributed at both ends of the filtering diaphragm 64, the filtering diaphragm 64 can filter particulate matter and water vapor, the limiting table 61, the outer shell 62, and the inner liner 63 are all threadedly connected with the inner connecting pipe 517 or the outer connecting pipe 518, and the inner connecting pipe 517 and the outer connecting pipe 518 located at one end of the inner liner 63 are distributed on both sides of the center of the filtering diaphragm 64. The outer shell 62 and the inner liner 63 are both spherical, and are both composed of two hemispheres. A water storage space is arranged between the outer shell 62 and the inner liner 63, the water leakage hole 65 connects the water storage space and the inner space of the inner liner 63, and the side opening 67 extends to both sides of the limiting table 61. The water leakage hole 65 is tapered, with a narrow opening close to the filtering diaphragm 64 and a wide opening at the other end, so as to avoid the backflow of accumulated water in the outer shell 62 into the inner liner 63.

[0052] By arranging the filtering assembly 6, the outer connecting pipe 518 inputs hot air into the inner liner 63, the filtering diaphragm 64 filters particulate matter and water vapor in the hot air, and the pure hot air is input into the straight-through pipeline 53 through the inner connecting pipe 517, so that particulate matter and water vapor can be prevented from entering the heating pipeline 51, the return pipeline 52, and the straight-through pipeline 53, the heating pipeline 51, the return pipeline 52, and the straight-through pipeline 53 will not be corroded by particulate matter and water vapor, the heat conduction efficiency can be maintained for a long time, and the service life can be prolonged. At the same time, the water vapor collected by the filtering diaphragm 64 falls into the inner liner 63 and enters the water storage space, so that the accumulated water can be prevented from entering the outer connecting pipe 518 or the inner connecting pipe 517.

[0053] In combination with Embodiments 1-2, the working principle of the hot air deicing device for wind power blade with temperature protection function of the present application is as follows:

[0054] When installing, the inner plate 56 is installed into the embedding hole 55, then the electric telescopic rod 58 is inserted into the installation hole 57, then the adjusting inner core 59 is connected to the electric telescopic rod 58, finally the outer sleeve 513 is sleeved outside the adjusting inner core 59, and the outer sleeve 513 and the inner plate 56 are fixed by bolts; the heating pipeline 51, the return pipeline 52 and the straight-through pipeline 53 are correspondingly laid in the corresponding areas in the rotating blade 4, the jump bridge 54 is connected to the heating interface 514, and the heating pipeline 51 is connected to the straight-through interface 515.

[0055] The filter diaphragm 64 is placed into one side of the inner liner 63, then the two inner liners 63 are spliced together, the inner connecting pipe 517 is penetrated through the limiting table 61, the outer shell 62 is sleeved outside the inner connecting pipe 517, the outer shell 62 is embedded in the groove, and the outer connecting pipe 518 is penetrated through the limiting table 61 and the outer shell 62 on the other side by the same operation, then the two outer shells 62 are spliced outside the inner liner 63, so that the assembly of the filter assembly 6 is completed, and finally the filter assembly 6 is fixed into the blade tail 44.

[0056] In use, the hot air blower set sends hot air into the outer connecting pipe 518, then the outer connecting pipe 518 sends the hot air into the inner liner 63, the hot air passes through the filter diaphragm 64 and enters the inner connecting pipe 517, in the process, particulate matters and water vapor in the hot air are intercepted, the hot air passes through the inner connecting pipe 517 and enters the straight-through pipeline 53, when the hot air flows to the jump bridge 54, the hot air enters the outer sleeve 513 through the heating interface 514, at this time, the adjusting inner core 59 is above the outer sleeve 513, the adjusting inner core 59 is separated from the straight-through interface 515, one side of the heating interface 514 is in communication with the upper end gap 510, and the other side of the heating interface 514 is blocked by the adjusting inner core 59, so that the hot air flows from the upper gap 510 to the lower gap 511, then flows into the heating pipeline 51 through the straight-through interface 515, and the hot air flows along the heating pipeline 51 all the way, a large amount of heat is transferred to the leading edge 41 in the flowing process, when the hot air meets the outer sleeve 513 again, if deicing is not needed at this position, the sensor feeds back a signal to the electric telescopic rod 58, the electric telescopic rod 58 pulls the adjusting inner core 59, so that the communication hole 512 is in butt joint with the heating interface 514, and the adjusting inner core 59 blocks the opening on one side of the straight-through interface 515, so that the hot air enters the outer sleeve 513 through the straight-through interface 515, flows into the upper gap 510 from the straight-through interface 515, flows into the jump bridge 54 and the straight-through pipeline 53 through the communication hole 512 and the heating interface 514, and the hot air flows along the straight-through pipeline 53 all the way, flows rapidly to the blade tip 43, and reduces heat loss, so that the hot air takes different routes according to actual conditions, and finally enters the return pipeline 52 and returns to the hot air blower set.

[0057] Since the hot air circulation channel is relatively closed, it is difficult for particulate matter to penetrate, while water vapor can penetrate more easily. After the equipment has been working for a period of time, a large amount of water vapor will gather on the surface of the filter membrane 64. The water vapor will gather and condense and flow down, gathering in the lining 63. When the rotating blades 4 rotate around the blade platform 3, the accumulated water will flow into the outer casing 62 through the leakage holes 65.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wind turbine blade hot air deicing device with a temperature protection function, comprising a frame (1), a nacelle (2) arranged on the top of the frame (1), a blade platform (3) arranged in front of the nacelle (2), and a rotating blade (4) arranged outside the blade platform (3), wherein the rotating blade (4) comprises a leading edge (41), a trailing edge (42), a blade tip (43), and a blade tail (44), and is characterized in that: It also includes a heating component (5), which specifically includes a heating pipe (51) and a return pipe (52) arranged in the rotating blade (4); The heating pipe (51) is laid on the inner wall of the leading edge (41), and the return pipe (52) is laid on the inner wall of the trailing edge (42). The heating pipe (51) and the return pipe (52) are connected at the blade tip (43), and the heating pipe (51) and the return pipe (52) extend from the blade tail (44); The heating assembly (5) further includes a straight-through pipe (53) disposed in the rotating blade (4), the straight-through pipe (53) being laid on the inner wall of the leading edge (41), and a jump bridge (54) being provided at the junction of the straight-through pipe (53) and the heating pipe (51); The heating assembly (5) further includes an embedding hole (55) provided on the inner wall of the front edge (41), an inner panel (56) and an outer sleeve (513) provided inside the embedding hole (55), a mounting hole (57) provided on the surface of the inner panel (56), an electric telescopic rod (58) provided inside the mounting hole (57), a heating interface (514) and a through interface (515) provided on the outside of the outer sleeve (513), an adjusting inner core (59) provided inside the outer sleeve (513), an upper notch (510), a lower notch (511) and a connecting hole (512) provided on the outside of the adjusting inner core (59), and a jack (516) provided on one end of the adjusting inner core (59) close to the inner panel (56); A sensor is provided in the inner panel (56); one end of the electric telescopic rod (58) away from the inner panel (56) is threadedly connected to the socket (516); the upper notch (510) is connected to the lower notch (511); the communicating hole (512) is connected to the upper notch (510); the heating pipe (51) is connected to the openings at both ends of the straight-through interface (515); the jumping bridge (54) is connected to the openings at both ends of the heating interface (514); and the heating interface (514) is connected to the communicating hole (512).

2. The hot air deicing device for wind turbine blades with temperature protection function according to claim 1 is characterized in that: The heating pipe (51) is laid in a coiled manner and gradually becomes sparser from the blade tail (44) to the blade tip (43).

3. The hot air deicing device for wind turbine blades with temperature protection function according to claim 2 is characterized in that: The upper notch (510) is butted against one end of the heating pipe (51) close to the blade tail (44), and the lower notch (511) is butted against one end of the jumping bridge (54) close to the blade tail (44).

4. The hot air deicing device for wind turbine blades with temperature protection function according to claim 3 is characterized in that: A filter assembly (6) is also provided in the rotating blade (4). The filter assembly (6) is located in the blade tail (44) and closes the opening of the blade tail (44).

5. The hot air deicing device for wind turbine blades with temperature protection function according to claim 4 is characterized in that: The filter assembly (6) specifically includes two limiting platforms (61) arranged in the blade tail (44), a shell (62) arranged between the two limiting platforms (61), an inner liner (63) arranged inside the shell (62), a filter membrane (64) arranged inside the inner liner (63), a through hole (66) opened at the center of the limiting platform (61), and a side opening (67) opened on the outside of the shell (62); the heating assembly (5) also includes an internal pipe (517) and an external pipe (518); A groove is provided on one side of the limiting platform (61) close to the outer shell (62), and through holes (66) penetrate into the inner lining (63) from both ends. The internal pipe (517) and the external pipe (518) penetrate the through holes (66) and are distributed at both ends of the filter membrane (64).

6. The hot air deicing device for wind turbine blades with temperature protection function according to claim 5 is characterized in that: The filter assembly (6) further includes a water leakage hole (65) provided on the outside of the lining (63); The outer shell (62) and the inner lining (63) are both spherical, a water storage space is provided between the outer shell (62) and the inner lining (63), and the water leakage hole (65) communicates with the water storage space and the internal space of the inner lining (63).

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