Deicing device, deicing control method and wind driven generator

Abstract

The invention relates to the technical field of deicing of wind driven generators, and discloses a deicing device, a deicing control method and a wind driven generator. The deicing device comprises a deicing module, an environment monitoring module, a heat energy recovery module and a control module. And the deicing module is used for heating and deicing the blade, one end of the deicing module is located in the cabin, and the other end of the deicing module corresponds to the blade, so that it is ensured that deicing operation can be efficiently conducted on the blade. One end of the heat energy recovery module is connected to the deicing module, and the other end of the heat energy recovery module is connected to a radiator in a cabin of the wind driven generator to recover heat emitted by the radiator. According to the deicing device, the heat energy recovery module is additionally arranged, so that heat emitted by the radiator can be recovered by the heat energy recovery module, and then the collected heat is used for supplying energy to the deicing module through the heat energy recovery module, so that efficient utilization of the heat is realized, and the technical problem that the utilization rate of heating airflow of an existing deicing device is low is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of deicing of wind turbines, and in particular relates to a deicing device, a deicing control method and a wind turbine. Background Art

[0002] The blades of a wind turbine are one of the most important components of a wind turbine and are key components for wind turbines to obtain wind energy. During operation, especially in cold weather, the temperature change of the wind turbine blades directly affects whether the blade surface is frozen. Once ice accumulates on the blades, the output power of the wind turbine will be greatly reduced. Once the ice coverage exceeds the threshold, the wind turbine must be shut down, which will cause a sudden drop in the load of the power grid and instability. Therefore, timely anti-icing operations can reduce the occurrence of shutdowns and damage to wind turbines due to icing. However, in order to avoid large instantaneous power consumption, the existing deicing technology has intelligently implemented time-sharing and regional control, but there are still problems of uneven heating and low utilization of heating airflow during operation, which is not conducive to the safe operation of wind turbines. Summary of the invention

[0003] The purpose of the present invention is to provide a deicing device, a deicing control method and a wind turbine generator, so as to solve the technical problem that the utilization rate of the heated airflow of the existing deicing device is low.

[0004] In order to achieve the above object, the present invention provides a deicing device for blades of a wind turbine generator, wherein the wind turbine generator comprises a nacelle, blades arranged outside the nacelle, and a radiator arranged inside the nacelle, and the deicing device comprises:

[0005] A de-icing module is used to heat and melt ice on the blades. One end of the de-icing module is arranged corresponding to the blades, and the other end is located in the cabin;

[0006] Environmental monitoring module, used to continuously monitor the current temperature of the blade and send the current temperature signal;

[0007] A heat recovery module, one end of which is connected to the deicing module and the other end of which is connected to the radiator. The heat recovery module is used to recover the heat dissipated by the radiator and supply energy to the deicing module.

[0008] The control module is electrically connected to the de-icing module, the heat recovery module and the environment monitoring module. The control module is configured as follows:

[0009] Get the current temperature of the blade in real time;

[0010] When the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module are controlled to be turned on to heat the blade to melt ice;

[0011] When the current temperature is greater than or equal to the preset temperature, the de-icing module and the heat recovery module are controlled to be turned off.

[0012] In an embodiment of the present invention, the de-icing module includes an air outlet component and a heating component. The air outlet component is arranged corresponding to the blades. The heating component is located in the cabin. The heating component can be used to produce hot air and transport it to the air outlet component so that the air outlet component heats the blades to melt ice.

[0013] In an embodiment of the present invention, the heating assembly includes a high-pressure fan, a multi-stage heater and a gas slip ring which are sequentially connected through a pipeline, the multi-stage heater is used to heat the wind blown from the high-pressure fan, the deicing device also includes a gas monitoring module, the gas monitoring module is used to monitor the hot air parameters of the air outlet end of the multi-stage heater, and the control module is electrically connected to the gas monitoring module and is used to control the opening or closing of the gas slip ring according to the hot air parameters.

[0014] In an embodiment of the present invention, the de-icing device also includes a plurality of temperature sensors arranged one-to-one corresponding to the blades. The temperature sensors are electrically connected to the control module. The temperature sensors are used to detect the current temperature of the blades. The control module is used to determine whether the blades are in an abnormal state based on the current temperature.

[0015] In an embodiment of the present invention, the gas slip ring has multiple gas connection ends, the multiple gas connection ends are connected to multiple gas pipelines one by one, the multiple gas pipelines are arranged one by one with multiple blades, each gas pipeline is provided with a partition control valve, and each partition control valve is electrically connected to the control module.

[0016] In an embodiment of the present invention, the air outlet assembly includes a plurality of return air fans, and a return air fan is correspondingly provided at the air outlet end of each air transmission pipeline.

[0017] In an embodiment of the present invention, a deicing control method is provided, which is applied to the deicing device as described above. The deicing control method includes:

[0018] Get the current temperature of the blade in real time;

[0019] When the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module are controlled to be turned on to heat the blade to melt ice;

[0020] When the current temperature is greater than or equal to the preset temperature, the de-icing module and the heat recovery module are controlled to be turned off.

[0021] In an embodiment of the present invention, the deicing module includes a high-pressure fan, a multi-stage heater and a gas slip ring, and the deicing device also includes a gas monitoring module. When the current temperature is lower than a preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module are controlled to be turned on to heat and melt the ice on the blade. The steps include:

[0022] Real-time acquisition of hot air parameters at the air outlet of the multi-stage heater;

[0023] When the hot air parameter is lower than the first preset hot air parameter, the multi-stage heater and the heat recovery module are controlled to be turned on, and the current operating power of the two is adjusted;

[0024] When the hot air parameter is higher than the first preset hot air parameter and lower than the second preset hot air parameter, the gas slip ring is controlled to open;

[0025] When the hot air parameter is higher than the second preset hot air parameter, the high pressure blower, the multi-stage heater and the heat recovery module are all controlled to be turned off;

[0026] Wherein, the second preset hot air parameter is greater than the first preset hot air parameter.

[0027] In an embodiment of the present invention, when it is detected that the hot air parameter is lower than the first preset hot air parameter, the step of controlling both the multi-stage heater and the heat recovery module to turn on and adjusting the current operating power of the two further includes:

[0028] In the process of adjusting the current operating power, the hot air parameters of the air outlet of the multi-stage heater are obtained in real time;

[0029] When the hot air parameter reaches the first preset hot air parameter, the multi-stage heater and the heat energy recovery module are controlled to operate according to the current operating power.

[0030] In an embodiment of the present invention, a wind turbine is provided, comprising the deicing device as described above.

[0031] Through the above technical solutions, the deicing device, deicing control method and wind turbine provided by the embodiments of the present invention have the following beneficial effects:

[0032] The wind turbine generator includes a nacelle, blades arranged outside the nacelle, and a radiator arranged in the nacelle. The deicing device in this embodiment includes a deicing module, an environmental monitoring module, a heat recovery module, and a control module. The deicing module is used to heat and melt the blades. One end of the deicing module is located in the nacelle, and the other end is arranged corresponding to the blades to ensure that the blades can be deiced efficiently. One end of the heat recovery module is connected to the deicing module, and the other end is connected to the radiator in the nacelle of the wind turbine generator to recover the heat emitted by the radiator. In this embodiment, a heat recovery module is added so that the heat emitted by the radiator can be recovered by the heat recovery module, and then the collected heat is used to supply energy to the deicing module through the heat recovery module, thereby achieving efficient use of heat and solving the technical problem of low utilization rate of heating airflow in the existing deicing device. The environmental detection module continuously monitors the current temperature of the blades and sends the current temperature signal to the control module. The control module is electrically connected to the deicing module, the heat recovery module, and the environmental monitoring module. The de-icing device of this embodiment obtains the current temperature of the blades in real time through the environmental detection module. When the current temperature of the blades is lower than the preset temperature, it is confirmed that the blades are in an abnormally frozen state. At this time, the control module will control the de-icing module and the heat energy recovery module to turn on, and heat and melt the blades. When the current temperature is greater than or equal to the preset temperature, it can be determined that the blades have completed heating and melting, and the control module will control the de-icing module and the heat energy recovery module to turn off.

[0033] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0035] Figure 1 A schematic diagram of the structure of the deicing device according to the present invention;

[0036] Figure 2 Schematic diagram of the flow of the deicing control method according to the present invention.

[0037] Description of Reference Numerals

[0038] 111 Return fan 3 Heat recovery module

[0039] 121 High pressure blower 4 Gas monitoring module

[0040] 122 Multi-stage heater 5 control module

[0041] 123 Gas Slip Ring 6 Temperature Sensor

[0042] 2 Environmental Monitoring Module 7 Zone Control Valve DETAILED DESCRIPTION

[0043] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0044] The deicing device, deicing control method and wind turbine generator according to the present invention will be described below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, in this embodiment, a deicing device for blades of a wind turbine is proposed. The wind turbine includes a nacelle, blades arranged outside the nacelle, and a radiator arranged in the nacelle. The deicing device includes a deicing module, an environmental monitoring module 2, a heat recovery module 3, and a control module 5. The deicing module is used to heat and melt ice on the blades. One end of the deicing module is arranged corresponding to the blades, and the other end is located in the nacelle. The environmental monitoring module 2 is used to continuously monitor the current temperature of the blades and send a current temperature signal. One end of the heat recovery module 3 is connected to the deicing module, and the other end is connected to the radiator. The heat recovery module 3 is used to recover the heat dissipated by the radiator and supply energy to the deicing module. In this embodiment, by adding the heat recovery module 3, the heat dissipated by the radiator can be recovered by the heat recovery module 3, and then the heat recovery module 3 uses the collected heat to supply energy to the deicing module, thereby realizing efficient utilization of heat and solving the technical problem of low utilization rate of heating airflow in the existing deicing device. The control module 5 is electrically connected to the deicing module, the heat recovery module 3 and the environment monitoring module 2. The control module 5 is configured to obtain the current temperature of the blade in real time. When the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module 3 are controlled to be turned on to heat and melt the ice of the blade. When the current temperature is greater than or equal to the preset temperature, the deicing module and the heat recovery module 3 are controlled to be turned off. The deicing device of this embodiment obtains the current temperature of the blade in real time through the environment detection module. When the current temperature of the blade is lower than the preset temperature, it is determined that the blade is in an abnormal icing state. At this time, the control module 5 will control the deicing module and the heat recovery module 3 to be turned on to heat and melt the ice of the blade until the current temperature is greater than or equal to the preset temperature. It can be determined that the blade has completed ice melting, and the control module 5 will control the deicing module and the heat recovery module 3 to be turned off. Among them, the environment monitoring module 2 can be set on the top of the cabin. In addition to temperature detection, the environment monitoring module 2 can also monitor the current humidity and other information in real time, and feed the monitored information back to the control unit.

[0046] In this embodiment, the deicing module includes an air outlet component and a heating component. The air outlet component is set corresponding to the blade, and the heating component is located in the cabin. The heating component can be used to produce hot air and transport the hot air to the air outlet component. Similarly, the heat recovered from the heat recovery module 3 can also produce hot air after being heated by the heating component and transported to the air outlet component, so as to achieve efficient use of heat. The air outlet component in this embodiment plays the role of transmitting hot air. When the hot air is transmitted to the air outlet component, it can reach the tip of the blade under the blowing of the air outlet component to ensure that the hot air is blown evenly, and the blade can be evenly heated and ice-melted as a whole, so that the deicing device has a good heating and ice-melting effect.

[0047] like Figure 1 As shown, in this embodiment, the heating assembly includes a high-pressure fan 121, a multi-stage heater 122 and a gas slip ring 123 which are sequentially connected through a pipeline. The multi-stage heater 122 is used to heat the wind blown from the high-pressure fan 121. The deicing device also includes a gas monitoring module 4, which is arranged at the air outlet of the multi-stage heater 122 and is used to monitor the hot air parameters of the air outlet of the multi-stage heater 122. The control module 5 is electrically connected to the gas monitoring module 4 and is used to control the opening or closing of the gas slip ring 123 according to the hot air parameters. The gas slip ring 123 in this embodiment adopts a three-port gas slip ring, which is provided with three air outlets to respectively deliver hot air to different blades. Among them, a mounting bracket is also provided on the hub of the wind turbine, and the gas slip ring 123 is fixed on the mounting bracket to stably divert the hot air.

[0048] like Figure 1 As shown, in this embodiment, the deicing device also includes a plurality of temperature sensors 6 arranged one-to-one corresponding to the blades. The temperature sensors 6 are electrically connected to the control module 5. The temperature sensors 6 are used to detect the current temperature of the blades and feed back to the control module 5. The control module 5 is used to determine whether the blades are in an abnormal state according to the current temperature. In this embodiment, the number of blades of the wind turbine is three, so three temperature sensors 6 are also provided. By arranging the temperature sensors 6, the temperature at each blade can be further determined, and the current temperature of the blade is transmitted to the control module 5 in real time, which plays a role in assisting in correcting the current temperature collected by the environmental monitoring module 2.

[0049] Furthermore, a temperature sensor 6 is arranged in the cabin, and the temperature sensor 6 is also electrically connected to the control module 5. The temperature sensor 6 in the cabin is used to monitor the temperature information in the cabin in real time and provide feedback to the control module 5. The de-icing device is also equipped with an information interaction module, which is electrically connected to the control module 5 and is used to transmit monitoring information to an external base station. If the temperature in the cabin exceeds the preset safety temperature, the abnormal information can be fed back to the external base station in time, so that the staff can take corresponding measures.

[0050] like Figure 1 As shown, the gas slip ring 123 has a plurality of gas connection ends, and the plurality of gas connection ends are connected to a plurality of gas pipelines in one-to-one correspondence, and the plurality of gas pipelines are arranged in one-to-one correspondence with the plurality of blades, and each gas pipeline is provided with a partition control valve 7, and each partition control valve 7 is electrically connected to the control module 5. In this embodiment, three gas pipelines are provided, and the three gas pipelines are connected to the gas slip ring 123. The partition control valve 7 is used to control the on-off of the gas pipeline. The temperature sensor 6 arranged on the blade feeds back the current temperature information to the control module 5 to determine whether the blade is in an icing state, and can only open the partition control valve 7 on the gas pipeline that needs to be heated and de-iced according to actual needs, so as to achieve efficient use of heat energy.

[0051] Furthermore, a sub-control box is also provided on the de-icing device, and the sub-control box is electrically connected to the partition control valves 7 provided on the three gas transmission pipelines, and the sub-control box is electrically connected to the control module 5. The sub-control box is also electrically connected to the three temperature sensors 6. The sub-control box can open or close the partition control valve 7 according to the feedback of the temperature sensor 6. If the temperature sensor 6 at a certain blade feedbacks that the current temperature of the blade is equal to or higher than the preset temperature, the partition control valve 7 of the corresponding branch may not be opened. In this embodiment, because the overall size of the wind turbine is large and the line is laid for a long time, it is necessary to add a sub-control box to facilitate secondary control, thereby ensuring that the instructions of the control module 5 can be accurately and quickly transmitted to the partition control valve 7. Among them, the partition control valve 7 and the sub-control box of this embodiment can be arranged in the hub of the wind turbine accordingly.

[0052] like Figure 1 As shown, in this embodiment, the air outlet assembly includes a plurality of return air fans 111, and a return air fan 111 is correspondingly provided at the air outlet end of each air transmission pipeline. In this embodiment, there are three blades of the wind turbine, and therefore three return air fans 111 are correspondingly provided to ensure that the hot air can be evenly blown to the tip of the blade, and to ensure that the blade can achieve a good heating and ice-melting effect under the blowing of the hot air. Specifically, the return air fan 111 can be installed on a return air baffle plate provided on the blade near the root of the blade. A ventilation duct is formed inside the blade, and the air outlet end of the multi-stage heater 122 is provided corresponding to the return air fan 111. The temperature sensor 6 is arranged in the ventilation duct, and the position of the temperature sensor 6 inside the ventilation duct can be adjusted according to actual needs.

[0053] like Figure 2 As shown, in this embodiment, a deicing control method is proposed, which is applied to the deicing device as described above. The deicing control method includes:

[0054] S10: obtaining the current temperature of the blade in real time;

[0055] S20: when the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module 3 are controlled to be turned on to heat the blade to melt ice;

[0056] S30: When the current temperature is greater than or equal to the preset temperature, the deicing module and the heat recovery module 3 are controlled to be turned off.

[0057] In this embodiment, the environmental monitoring module can monitor the status of the blades in real time and obtain the current temperature information of the blades. Since the environmental monitoring module is electrically connected to the control module 5, the control module 5 can control the deicing module and the heat recovery module 3 to start working and heat and melt the blades when the current temperature of the blades is lower than the preset temperature. When the current temperature of the blades is greater than or equal to the preset temperature, it can be determined that the blades have completed heating and melting, and the deicing module and the heat recovery module 3 can be turned off.

[0058] In this embodiment, the deicing module includes a high-pressure fan 121, a multi-stage heater 122 and a gas slip ring 123, and the deicing device also includes a gas monitoring module 4. When the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module 3 are controlled to be turned on to heat and melt the ice on the blade. The steps include:

[0059] Real-time acquisition of hot air parameters at the air outlet of the multi-stage heater 122;

[0060] When the hot air parameter is lower than the first preset hot air parameter, the multi-stage heater 122 and the heat recovery module 3 are both turned on, and the current operating power of the two is adjusted;

[0061] When the hot air parameter is higher than the first preset hot air parameter and lower than the second preset hot air parameter, the control gas slip ring 123 is opened;

[0062] When the hot air parameter is higher than the second preset hot air parameter, the high pressure fan 121, the multi-stage heater 122 and the heat recovery module 3 are all controlled to be turned off;

[0063] Among them, the second preset hot air parameter is greater than the first preset hot air parameter, and the first preset hot air parameter and the second preset hot air parameter can be set according to actual needs. Specifically, the hot air parameters include gas flow rate, gas temperature and gas pressure, which are the basis for judging whether the deicing module is in thermal cycle balance in this embodiment. When the hot air parameter is higher than the first preset hot air parameter and less than the second preset hot air parameter, it can be judged that the deicing module is in a thermal cycle balance state, and the hot air produced can efficiently achieve the effect of heating and melting ice. When the hot air parameter is higher than the second preset hot air parameter, it means that the overall load of the deicing module is high and is in an abnormal state. To ensure the safety of the device, the high-pressure fan 121, the multi-stage heater 122 and the heat recovery module 3 should be turned off in time to avoid excessive temperature and damage to parts such as the multi-stage heater 122 or the gas slip ring 123. In addition, when the stability sensor detects that the current temperature of the blade is equal to or higher than the preset temperature, the multi-stage heater 122 stops heating and enters a cooling period. It cannot be started again during the cooling period. The cooling period can only end when the temperature of the multi-stage heater 122 cools to a pre-set safety temperature. The safety temperature of the multi-stage heater 122 also needs to be set according to actual needs.

[0064] In this embodiment, when it is detected that the hot air parameter is lower than the first preset hot air parameter, the step of controlling both the multi-stage heater 122 and the heat recovery module 3 to turn on and adjusting the current operating power of the two further includes:

[0065] In the process of adjusting the current operating power, the hot air parameters of the air outlet of the multi-stage heater 122 are obtained in real time;

[0066] When the hot air parameter reaches the first preset hot air parameter, the multi-stage heater 122 and the heat recovery module 3 are controlled to operate according to the current operating power to ensure that hot air with good quality can always be output.

[0067] Among them, when the gas flow rate, gas temperature and gas pressure all meet the predetermined values, it can be confirmed that the hot air at this time has reached a thermal cycle balance. At this time, the output hot air quality is good and can efficiently heat and melt the blades.

[0068] In this embodiment, a wind turbine generator is provided, comprising the deicing device as described above. Since the wind turbine generator adopts all embodiments of the deicing device, it also has all the beneficial effects brought by the deicing device, which will not be described in detail here.

[0069] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A deicing device for wind turbine blades, characterized in that: The wind turbine generator comprises a nacelle, blades arranged outside the nacelle and a radiator arranged inside the nacelle, and the deicing device comprises: A deicing module, the deicing module is used to heat and melt ice on the blades, one end of the deicing module is arranged corresponding to the blades, and the other end is located in the cabin; An environmental monitoring module (2), used for continuously monitoring the current temperature of the blade and sending a current temperature signal; a heat recovery module (3), one end of which is connected to the deicing module and the other end of which is connected to the radiator, the heat recovery module (3) being used to recover heat dissipated by the radiator and supply energy to the deicing module; A control module (5) is electrically connected to the deicing module, the heat recovery module (3) and the environment monitoring module (2), and the control module (5) is configured as follows: Acquire the current temperature of the blade in real time; When the current temperature is lower than a preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module (3) are controlled to be turned on to heat and melt the ice on the blade; When the current temperature is greater than or equal to the preset temperature, the deicing module and the heat recovery module (3) are controlled to be turned off.

2. The deicing device according to claim 1, characterized in that: The de-icing module includes an air outlet component and a heating component. The air outlet component is arranged corresponding to the blades. The heating component is located in the cabin. The heating component can be used to produce hot air and transport it to the air outlet component so that the air outlet component heats the blades to melt ice.

3. The deicing device according to claim 2, characterized in that: The heating assembly comprises a high-pressure fan (121), a multi-stage heater (122) and a gas slip ring (123) which are connected in sequence through a pipeline; the multi-stage heater (122) is used to heat the wind blown from the high-pressure fan (121); the deicing device also comprises a gas monitoring module (4); the gas monitoring module (4) is used to monitor the hot air parameters at the air outlet end of the multi-stage heater (122); the control module (5) is electrically connected to the gas monitoring module (4) and is used to control the opening or closing of the gas slip ring (123) according to the hot air parameters.

4. The deicing device according to claim 1, characterized in that: The deicing device further comprises a plurality of temperature sensors (6) arranged one-to-one corresponding to the blades, the temperature sensors (6) being electrically connected to the control module (5), the temperature sensors (6) being used to detect the current temperature of the blades, and the control module (5) being used to determine whether the blades are in an abnormal state based on the current temperature.

5. The deicing device according to claim 3, characterized in that: The gas slip ring (123) has a plurality of gas connection ends, the plurality of gas connection ends are connected to a plurality of gas pipelines in a one-to-one correspondence, the plurality of gas pipelines are arranged in a one-to-one correspondence with the plurality of blades, each of the gas pipelines is provided with a partition control valve (7), and each of the partition control valves (7) is electrically connected to the control module (5).

6. The deicing device according to claim 5, characterized in that: The air outlet assembly comprises a plurality of return air fans (111), and each air outlet end of the air supply pipeline is correspondingly provided with a return air fan (111).

7. A de-icing control method, characterized in that: Applied to the deicing device according to any one of claims 1 to 6, the deicing control method comprises: Acquire the current temperature of the blade in real time; When the current temperature is lower than a preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module (3) are controlled to be turned on to heat and melt the ice on the blade; When the current temperature is greater than or equal to the preset temperature, the deicing module and the heat recovery module (3) are controlled to be turned off.

8. The de-icing control method according to claim 7, characterized in that: The deicing module comprises a high-pressure fan (121), a multi-stage heater (122) and a gas slip ring (123), and the deicing device further comprises a gas monitoring module (4). When the current temperature is lower than a preset temperature, it is determined that the blade is in an abnormal state, and the deicing module and the heat recovery module (3) are controlled to be turned on to heat and melt the ice on the blade, and the steps include: acquiring in real time the hot air parameters of the air outlet of the multi-stage heater (122); When the hot air parameter is lower than a first preset hot air parameter, controlling the multi-stage heater (122) and the heat energy recovery module (3) to both be turned on, and adjusting the current operating power of the two; When the hot air parameter is higher than the first preset hot air parameter and lower than the second preset hot air parameter, controlling the gas slip ring (123) to open; When the hot air parameter is higher than a second preset hot air parameter, the high-pressure fan (121), the multi-stage heater (122) and the heat recovery module (3) are all controlled to be turned off; Wherein, the second preset hot air parameter is greater than the first preset hot air parameter.

9. The de-icing control method according to claim 8, characterized in that: When it is detected that the hot air parameter is lower than a first preset hot air parameter, the step of controlling both the multi-stage heater (122) and the heat recovery module (3) to be turned on and adjusting the current operating power of the two further includes: In the process of adjusting the current operating power, hot air parameters of the air outlet of the multi-stage heater (122) are obtained in real time; When the hot air parameter reaches the first preset hot air parameter, the multi-stage heater (122) and the heat energy recovery module (3) are controlled to operate according to the current operating power.

10. A wind turbine generator, characterized in that: The invention comprises a de-icing device according to any one of claims 1 to 6.

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