De-icing device, de-icing control method and wind turbine

Abstract

The present application relates to the technical field of wind turbine deicing, and discloses a deicing device, a deicing control method and a wind turbine. The deicing device comprises a deicing module, an environment monitoring module, a heat energy recovery module and a control module. The deicing module is used for heating and deicing the blades. One end of the deicing module is located in the cabin, and the other end is arranged corresponding to the blades to ensure that the deicing operation on the blades can be efficiently performed. One end of the heat energy recovery module is connected to the deicing module, and the other end is connected to a radiator in the cabin of the wind turbine to recover the heat emitted by the radiator. In the embodiment, the heat energy recovery module is additionally provided, so that the heat emitted by the radiator can be recovered by the heat energy recovery module, and then the collected heat is used to supply energy to the deicing module through the heat energy recovery module, thereby realizing efficient utilization of heat and solving the technical problem of low utilization rate of heated airflow of the existing deicing device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wind turbine deicing, and particularly relates to a deicing device, a deicing control method and a wind turbine. BACKGROUND

[0002] The blade of a wind turbine is one of the most important components of a wind turbine and is a key component for the wind turbine to obtain wind energy. During operation, especially in cold weather, the temperature change of the blade of the wind turbine directly affects whether the surface of the blade is iced. Once the blade is iced, the output power of the wind turbine will be greatly reduced, and once the icing exceeds a threshold, the wind turbine must be shut down, which will cause a sudden drop in the load of the power grid and an unstable situation. Therefore, timely deicing operation can reduce the shutdown and damage of the wind turbine caused by icing. However, the existing deicing technology avoids the problem of large instantaneous power consumption by intelligently controlling the time and region, but there are still problems of uneven heating and low utilization rate of heated air flow during the operation, which is not conducive to the safe operation of the wind turbine. SUMMARY

[0003] The present application aims to provide a deicing device, a deicing control method and a wind turbine to solve the technical problem of low utilization rate of heated air flow of the existing deicing device.

[0004] In order to achieve the above-mentioned purpose, the present application provides a deicing device for the blade of a wind turbine, the wind turbine comprising a nacelle, a blade arranged outside the nacelle and a radiator arranged in the nacelle, the deicing device comprising:

[0005] a deicing module, the deicing module being configured to heat and melt ice on the blade, one end of the deicing module corresponding to the blade and the other end being arranged in the nacelle;

[0006] an environmental monitoring module, the environmental monitoring module being configured to continuously monitor the current temperature of the blade and send a current temperature signal;

[0007] a heat energy recovery module, one end of the heat energy recovery module being connected to the deicing module and the other end being connected to the radiator, the heat energy recovery module being configured to recover heat emitted by the radiator and supply energy to the deicing module;

[0008] a control module, the control module being electrically connected to the deicing module, the heat energy recovery module and the environmental monitoring module, the control module being configured to:

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

[0010] in the case that the current temperature is lower than a preset temperature, determine that the blade is in an abnormal state, and control the deicing module and the heat energy recovery module to be turned on to heat and melt ice on the blade;

[0011] In a case that the current temperature is greater than or equal to the preset temperature, the deicing module and the heat energy recovery module are controlled to be closed.

[0012] In an embodiment of the present application, the deicing module comprises an air outlet assembly corresponding to the blades and a heating assembly located in the cabin, and the heating assembly can be used to generate hot air and deliver the hot air to the air outlet assembly to heat and melt ice on the blades.

[0013] In an embodiment of the present application, the heating assembly comprises a high-pressure fan, a multi-stage heater and a gas slip ring connected in sequence through pipelines, the multi-stage heater is used to heat air blown from the high-pressure fan, and the deicing device further comprises a gas monitoring module used to monitor a hot air parameter of an air outlet end of the multi-stage heater, and a control module is electrically connected with the gas monitoring module and used to control opening or closing of the gas slip ring according to the hot air parameter.

[0014] In an embodiment of the present application, the deicing device further comprises a plurality of temperature sensors arranged one by one corresponding to the blades, the temperature sensors are electrically connected with the control module, the temperature sensors are used to detect a current temperature of the blades, and the control module is used to determine whether the blades are in an abnormal state according to the current temperature.

[0015] In an embodiment of the present application, the gas slip ring has a plurality of gas connection ends, the plurality of gas connection ends are connected with a plurality of gas delivery pipelines one by one respectively, the plurality of gas delivery pipelines are arranged one by one corresponding to the plurality of blades respectively, each gas delivery pipeline is provided with a partition control valve at an air outlet end thereof, and each partition control valve is electrically connected with the control module.

[0016] In an embodiment of the present application, the air outlet assembly comprises a plurality of air return fans, and each gas delivery pipeline is provided with one air return fan corresponding to an air outlet end thereof.

[0017] In an embodiment of the present application, a deicing control method is provided and applied to the deicing device as described above, and the deicing control method comprises the following steps.

[0018] A current temperature of the blades is acquired in real time;

[0019] In a case that the current temperature is lower than the preset temperature, it is determined that the blades are in an abnormal state, and the deicing module and the heat energy recovery module are controlled to be opened to heat and melt ice on the blades;

[0020] In a case that the current temperature is greater than or equal to the preset temperature, the deicing module and the heat energy recovery module are controlled to be closed.

[0021] In an embodiment of the present application, the deicing module comprises a high-pressure fan, a multi-stage heater and a gas slip ring, the deicing device further comprises a gas monitoring module, in a case that the current temperature is lower than the preset temperature, it is determined that the blades are in an abnormal state, and the deicing module and the heat energy recovery module are controlled to be opened to heat and melt ice on the blades, and the steps comprise:

[0022] Real-time acquisition of the hot air parameter of the air outlet end of the multi-section heater;

[0023] When the hot air parameter is lower than the first preset hot air parameter, the multi-section heater and the heat energy recovery module are both controlled to be turned on, and the current operation power of both 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 be turned on;

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

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

[0027] In the embodiment of the present application, when it is detected that the hot air parameter is lower than the first preset hot air parameter, the step of controlling the multi-section heater and the heat energy recovery module to be turned on and adjusting the current operation power of both further includes:

[0028] In the process of adjusting the current operation power, the hot air parameter of the air outlet end of the multi-section heater is acquired in real time;

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

[0030] In the embodiment of the present application, a wind turbine is provided, which comprises the deicing device as described above.

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

[0032] The wind driven generator comprises a nacelle, a blade arranged outside the nacelle, and a radiator arranged in the nacelle. The deicing device in the embodiment comprises a deicing module, an environment monitoring module, a heat energy recovery module and a control module. The deicing module is used for heating and deicing the blade, one end of the deicing module is arranged in the nacelle, and the other end corresponds to the blade, so as to ensure that the deicing operation on the blade can be efficiently performed. One end of the heat energy recovery module is connected to the deicing module, and the other end is connected to the radiator in the nacelle of the wind driven generator, so as to recover the heat emitted by the radiator. In the embodiment, the heat energy recovery module is additionally arranged, so that the heat emitted by the radiator can be recovered by the heat energy recovery module, and then the collected heat is used 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 of the existing deicing device. The environment monitoring module continuously monitors the current temperature of the blade and sends a current temperature signal to the control module, and the control module is electrically connected with the deicing module, the heat energy recovery module and the environment monitoring module. The deicing device of the embodiment acquires the current temperature of the blade in real time through the environment monitoring module, and in the case that 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 controls the deicing module and the heat energy recovery module to be turned on to heat and deice the blade, and in the case that the current temperature is greater than or equal to the preset temperature, it is determined that the blade has completed the heating and deicing, and the control module controls the deicing module and the heat energy recovery module to be turned off.

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

[0034] The accompanying drawings are included to provide a further understanding of the embodiments of the application, and constitute a part of the specification, and are used together with the following detailed description to explain the embodiments of the application, but do not constitute a limitation on the embodiments of the application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0035] Figure 1 is a structural schematic diagram of the deicing device according to the present application;

[0036] Figure 2 is a flowchart of the deicing control method according to the present application.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] 111 return fan 3 heat energy recovery module

[0039] 121 high-pressure fan 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 Implementation

[0043] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] The de-icing device, de-icing control method, and wind turbine according to the present invention are described below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, this embodiment proposes a de-icing device for wind turbine blades. The wind turbine includes a nacelle, blades located outside the nacelle, and a radiator located inside the nacelle. The de-icing device includes a de-icing module, an environmental monitoring module 2, a heat recovery module 3, and a control module 5. The de-icing module is used to heat and melt ice on the blades. One end of the de-icing module is located opposite the blade, and the other end is located inside 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 de-icing 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 de-icing module. This embodiment, by adding the heat recovery module 3, enables the heat dissipated by the radiator to be recovered by the heat recovery module 3, and then the heat recovery module 3 uses the collected heat to supply energy to the de-icing module, thereby achieving efficient heat utilization and solving the technical problem of low utilization rate of heated airflow in existing de-icing devices. The control module 5 is electrically connected to the de-icing module, the heat recovery module 3, and the environmental monitoring module 2. The control module 5 is configured to acquire the current temperature of the blades in real time. If the current temperature is lower than a preset temperature, it determines that the blades are in an abnormal state and controls the de-icing module and the heat recovery module 3 to activate to heat and melt the ice on the blades. If the current temperature is greater than or equal to the preset temperature, it controls the de-icing module and the heat recovery module 3 to deactivate. In this embodiment, the de-icing device acquires the current temperature of the blades in real time through the environmental monitoring module. If the current temperature of the blades is lower than the preset temperature, it confirms that the blades are in an abnormal icing state. At this time, the control module 5 will activate the de-icing module and the heat recovery module 3 to heat and melt the ice on the blades until the current temperature is greater than or equal to the preset temperature, confirming that the blades have completed melting. The control module 5 will then deactivate the de-icing module and the heat recovery module 3. The environmental monitoring module 2 can be located on the top of the nacelle. In addition to temperature detection, the environmental monitoring module 2 can also monitor current humidity and other information in real time and feed the monitored information back to the control unit.

[0046] In the embodiment, the deicing module comprises an air outlet assembly corresponding to the blades and a heating assembly located in the nacelle. The heating assembly can be used to generate hot air and deliver the hot air to the air outlet assembly. Similarly, the heat recovered by the heat energy recovery module 3 can also be used to generate hot air after heating by the heating assembly and delivered to the air outlet assembly, realizing efficient use of heat. The air outlet assembly in the embodiment plays a role in delivering hot air. When the hot air is delivered to the air outlet assembly, it can reach the blade tip under the blowing of the air outlet assembly, ensuring uniform blowing of the hot air and uniform heating of the blades as a whole, so that the deicing device has good heating and ice melting effect.

[0047] As shown in Figure 1 In the embodiment, the heating assembly comprises a high-pressure fan 121, a multi-stage heater 122 and a gas slip ring 123 connected in sequence by a pipeline. The multi-stage heater 122 is used to heat the air blown by the high-pressure fan 121. The deicing device further comprises a gas monitoring module 4 arranged at the air outlet end of the multi-stage heater 122 and used to monitor the hot air parameters of the air outlet end of the multi-stage heater 122. The control module 5 is electrically connected with the gas monitoring module 4 and 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 the embodiment is a three-port gas slip ring provided with three air outlets to deliver hot air to different blades respectively. The wind turbine hub is further provided with a mounting bracket, and the gas slip ring 123 is fixed to the mounting bracket to stably divide the hot air.

[0048] As shown in Figure 1 In the embodiment, the deicing device further comprises a plurality of temperature sensors 6 arranged one by one corresponding to the blades. The temperature sensors 6 are electrically connected with 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 the 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 blades is transmitted to the control module 5 in real time, playing a role in assisting the correction of the current temperature collected by the environment monitoring module 2.

[0049] Further, the nacelle is also provided with a temperature sensor 6, which is also electrically connected with the control module 5. The temperature sensor 6 in the nacelle is used to monitor the temperature information in the nacelle in real time and feed back to the control module 5. The deicing device is also provided with an information interaction module electrically connected with the control module 5 and used to transmit monitoring information to an external base station. If the temperature in the nacelle 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] As shown in Figure 1 The gas slip ring 123 has a plurality of gas connection ends, which are connected to a plurality of gas supply pipes one by one, and the plurality of gas supply pipes are arranged one by one with the plurality of blades. Each gas supply pipe 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 supply pipes are provided, which are connected to the gas slip ring 123. The partition control valve 7 is used to control the on-off of the gas supply pipe. The current temperature information fed back by the temperature sensor 6 arranged on the blade can determine whether the blade is in icing condition, and the partition control valve 7 on the gas supply pipe needed for heating and deicing can be opened according to actual needs, so as to realize efficient use of heat energy.

[0051] Further, the deicing device is also provided with a sub-control box, which is electrically connected to the partition control valves 7 arranged on the three gas supply pipes, and is electrically connected to the control module 5 and the three temperature sensors 6. The sub-control box can control the opening or closing of the partition control valve 7 according to the feedback of the temperature sensor 6. For example, if the current temperature of a blade detected by the temperature sensor 6 is equal to or higher than the preset temperature, the partition control valve 7 of the corresponding branch can not be opened. In this embodiment, because the overall size of the wind turbine is large and the line is long, the sub-control box is needed to facilitate secondary control, so that the instructions of the control module 5 can be accurately and quickly transmitted to the partition control valve 7. In this embodiment, the partition control valve 7 and the sub-control box can be arranged in the hub of the wind turbine.

[0052] As shown in Figure 1 In this embodiment, the air outlet assembly includes a plurality of air return fans 111, and each gas supply pipe is provided with an air return fan 111. In this embodiment, the blade of the wind turbine has three air return fans 111, which can ensure that the hot air is evenly blown to the tip of the blade, and the blade can achieve good heating and deicing effect under the blowing of the hot air. Specifically, the air return fan 111 can be installed on the air return baffle arranged near the blade root of the blade. The inside of the blade forms an air duct, and the outlet end of the multi-section heater 122 is arranged corresponding to the air return fan 111. The temperature sensor 6 is arranged in the air duct, and the position of the temperature sensor 6 in the air duct can be adjusted according to actual needs.

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

[0054] S10: Real-time acquisition of the current temperature of the blade;

[0055] S20: In the case that 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 energy recovery module 3 are controlled to be turned on to heat and melt ice on the blade;

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

[0057] In the embodiment, the state of the blade can be monitored in real time and the current temperature information at the position where the blade is located can be obtained through the environment monitoring module. Since the environment monitoring module is electrically connected with the control module 5, the control module 5 can control the deicing module and the heat energy recovery module 3 to start working to heat and melt ice on the blade in the case that the current temperature information of the blade is lower than the preset temperature, and the deicing module and the heat energy recovery module 3 can be turned off in the case that the current temperature of the blade is greater than or equal to the preset temperature.

[0058] In the embodiment, the deicing module includes a high-pressure fan 121, a multi-section heater 122 and a gas slip ring 123, and the deicing device further includes a gas monitoring module 4. The steps of determining that the blade is in an abnormal state in the case that the current temperature is lower than the preset temperature and controlling the deicing module and the heat energy recovery module 3 to be turned on to heat and melt ice on the blade include:

[0059] The hot air parameters of the air outlet end of the multi-section heater 122 are obtained in real time;

[0060] In the case that the hot air parameters are lower than the first preset hot air parameters, the multi-section heater 122 and the heat energy recovery module 3 are controlled to be turned on, and the current operating power of the two is adjusted;

[0061] In the case that the hot air parameters are higher than the first preset hot air parameters and lower than the second preset hot air parameters, the gas slip ring 123 is controlled to be turned on;

[0062] In the case that the hot air parameters are higher than the second preset hot air parameters, the high-pressure fan 121, the multi-section heater 122 and the heat energy recovery module 3 are controlled to be turned off;

[0063] 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 parameter includes a gas flow rate, a gas temperature and a gas pressure, and is a measurement basis for determining whether the deicing module is in a thermal cycle balance in this embodiment. When the hot air parameter is higher than the first preset hot air parameter and lower than the second preset hot air parameter, it can be determined that the deicing module is in a thermal cycle balance state, and the output hot air 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 represents that the overall load of the deicing module is high, and it is in an abnormal state. To ensure the safety of the device, the high-pressure blower 121, the multi-stage heater 122 and the heat energy recovery module 3 should be closed in time to avoid damage to the multi-stage heater 122 or the gas slip ring 123 and other parts caused by excessively high temperature. In addition, when the stable 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. The multi-stage heater 122 cannot be started again during the cooling period. The multi-stage heater 122 can end the cooling period only 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 the multi-stage heater 122 and the heat energy recovery module 3 to be turned 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 parameter of the air outlet end of the multi-stage heater 122 is 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 energy recovery module 3 are controlled to work according to the current operating power, so as to always be able to output hot air with good quality.

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

[0068] In this embodiment, a wind turbine is provided, which includes the deicing device as described above. Since the wind turbine adopts all the 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 application, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0070] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A de-icing device for wind turbine blades, characterized in that, The wind turbine includes a nacelle, blades disposed outside the nacelle, and a radiator disposed inside the nacelle. The de-icing device includes: The de-icing module is used to heat and melt ice on the blades. One end of the de-icing module is located corresponding to the blades, and the other end is located in the nacelle. The de-icing module includes an air outlet assembly and a heating assembly. The air outlet assembly is located corresponding to the blades, and the heating assembly is located in the nacelle. The heating assembly can generate hot air and deliver it to the air outlet assembly so that the air outlet assembly heats and melts ice on the blades. The environmental monitoring module (2) is used to continuously monitor the current temperature of the blade and send the current temperature signal; The heat recovery module (3) is connected to the de-icing module at one end and to the radiator at the other end. The heat recovery module (3) is used to recover the heat emitted by the radiator and supply energy to the de-icing module. The control module (5) is electrically connected to the de-icing module, the heat recovery module (3), and the environmental monitoring module (2). The heating assembly includes a high-pressure blower (121), a multi-stage heater (122), and a gas slip ring (123) connected in sequence through pipes. The multi-stage heater (122) is used to heat the air blown from the high-pressure blower (121). The de-icing device also includes a gas monitoring module (4), which is used to monitor the hot air parameters at the 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 control module (5) is configured as follows: The current temperature of the blade is obtained in real time; If the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the de-icing module and the heat recovery module (3) are 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 de-icing module and the heat recovery module (3) are shut down.

2. The de-icing device according to claim 1, characterized in that, The de-icing device also includes multiple temperature sensors (6) arranged one-to-one with 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. The control module (5) is used to determine whether the blades are in an abnormal state based on the current temperature.

3. The de-icing device according to claim 1, characterized in that, The gas slip ring (123) has multiple gas inlet ends, each of which is connected to a multiple gas supply line. The multiple gas supply lines are arranged in a corresponding manner to the multiple blades. Each gas supply line is equipped with a zone control valve (7), and each zone control valve (7) is electrically connected to the control module (5).

4. The de-icing device according to claim 3, characterized in that, The air outlet assembly includes multiple return air fans (111), and each air outlet end of the air supply pipeline is provided with one of the return air fans (111).

5. A de-icing control method, characterized in that, The de-icing control method, applied to any one of claims 1 to 4, comprises: The current temperature of the blade is obtained in real time; If the current temperature is lower than the preset temperature, it is determined that the blade is in an abnormal state, and the de-icing module and the heat recovery module (3) are 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 de-icing module and the heat recovery module (3) are shut down.

6. The de-icing control method according to claim 5, characterized in that, The de-icing module includes a high-pressure blower (121), a multi-stage heater (122), and a gas slip ring (123). The de-icing device also includes a gas monitoring module (4). When the current temperature is lower than the preset temperature, if it is determined that the blade is in an abnormal state, the de-icing module and the heat recovery module (3) are activated to heat and melt the blade. The steps include: Real-time acquisition of hot air parameters at the outlet of the multi-segment heater (122); When the hot air parameter is lower than the first preset hot air parameter, the multi-segment heater (122) and the heat recovery module (3) are both turned on, and their current operating power is adjusted. 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 (123) is controlled to open; When the hot air parameter is higher than the second preset hot air parameter, the high-pressure blower (121), the multi-stage heater (122) and the heat recovery module (3) are all turned off; The second preset hot air parameter is greater than the first preset hot air parameter.

7. The de-icing control method according to claim 6, characterized in that, The step of controlling both the multi-segment heater (122) and the heat recovery module (3) to turn on and adjust their current operating power when the hot air parameter is detected to be lower than the first preset hot air parameter further includes: During the adjustment of the current operating power, the hot air parameters at the air outlet of the multi-segment heater (122) are obtained in real time; When the hot air parameters reach the first preset hot air parameters, the multi-stage heater (122) and the heat recovery module (3) are controlled to operate at the current operating power.

8. A wind turbine generator, characterized in that, Includes the de-icing device according to any one of claims 1 to 4.

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