A fan and a cleaning method and device for fan blades

Abstract

The application relates to a fan and a cleaning method and device for fan blades, and relates to the technical field of fans, which comprises the following steps: acquiring current gear and gear current data table; searching for corresponding current reference current from the gear current data table according to the current gear; acquiring real-time current; calculating a current difference ratio according to the real-time current and the current reference current; when the current difference ratio is greater than a preset loss ratio threshold, acquiring a cleaning mode and a cleaning depth range; selecting a current cleaning depth from the cleaning depth range according to the current difference ratio; adjusting the cleaning mode according to the current cleaning depth to obtain a current cleaning mode; controlling the fan to work at a preset cleaning power, and controlling a cleaning assembly to clean according to the current cleaning mode. The application has the effect of improving the cleaning efficiency of fan blades.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a method and apparatus for cleaning a wind turbine and its blades. Background Technology

[0002] Fans are commonly used devices in ventilation, air conditioning systems, industrial exhaust, and cooling. Their structure typically consists of a drive motor, fan blades, a shroud, and a housing. During operation, the drive motor rotates the fan blades at high speed, creating a directional airflow to achieve functions such as air supply, exhaust, or pressurization. However, as fans are used in industrial settings, dust and other contaminants accumulate on the fan blades.

[0003] In related technologies, the cleaning of fan blades is usually done by manual disassembly or blowing. The fan casing is disassembled manually, the fan blades are removed from the motor shaft, and the surface of each fan blade is wiped or blown with a cloth, brush or high-pressure air gun. After the fan blades are cleaned, they are reinstalled into the fan.

[0004] Regarding the aforementioned technologies, the manual disassembly and cleaning method is cumbersome and complex, and the cleaning efficiency is low, which cannot meet the needs of routine cleaning of multiple fans in industrial environments. Summary of the Invention

[0005] To improve the efficiency of cleaning fan blades, the present invention provides a fan and a method and apparatus for cleaning fan blades.

[0006] In a first aspect, the present invention provides a method for cleaning a fan and fan blades, employing the following technical solution: A method for cleaning a fan and its blades includes: Step S1: Obtain the current gear position and gear current data table; Step S2: Find the corresponding current reference current from the gear current data table based on the current gear position; Step S3: Obtain real-time current; Step S4: Calculate the current difference ratio based on the real-time current and the current reference current; Step S5: When the current difference ratio is greater than the preset loss ratio threshold, obtain the cleaning mode and cleaning depth range; Step S6: Select the current cleaning depth from the cleaning depth range according to the current difference ratio; Step S7: Adjust the cleaning mode according to the current cleaning depth to obtain the current cleaning mode; Step S8: Control the fan to work according to the preset cleaning power, and control the cleaning components to clean according to the current cleaning mode.

[0007] By adopting the above technical solution, the quantitative detection and adaptive cleaning of dust accumulation on the fan blades are realized. The current difference ratio is calculated by obtaining the reference current and real-time current corresponding to the current gear. When the difference ratio exceeds the loss ratio threshold, cleaning is automatically triggered without the need for manual judgment of the cleaning time, which effectively improves the cleaning efficiency.

[0008] Optional, also includes: Step S9: Obtain the current after cleaning; Step S10: Calculate the ratio of the difference between the current after cleaning and the current reference current; Step S11: When the current difference ratio after cleaning is not greater than the loss ratio threshold, output a preset cleaning completion signal; Step S12: When the current difference ratio after cleaning is greater than the loss ratio threshold, obtain the basic blowing mode, current blowing height and target blowing height; Step S13: Generate a blowing movement path based on the current blowing height and the target blowing height; Step S14: Control the air blowing component to move to the target air blowing height according to the air blowing movement path, and control the air blowing component to blow air onto the fan blades according to the basic air blowing mode; Step S15: Control the fan to work according to the cleaning power, and control the cleaning components to clean again according to the current cleaning mode.

[0009] By adopting the above technical solution, the current verification of the cleaning effect and the automatic linkage of jet-assisted cleaning are realized. After the dry cleaning is completed, the cleaning effect is automatically verified by calculating the ratio of the current difference after cleaning. When the effect meets the standard, the cleaning completion signal is output. When the effect does not meet the standard, the jet-assisted cleaning process is automatically triggered. Through the dual action of blowing air and physical brushing, stubborn dust is thoroughly removed, improving the effectiveness of fan blade cleaning.

[0010] Optionally, an optimization method is also included when the ratio of the current difference after cleaning is not greater than the loss ratio threshold, the method comprising: Step S110: When the current difference ratio after cleaning is not greater than the loss ratio threshold, obtain the fan blade image; Step S111: Analyze the fan blade image to obtain the dust distribution area; Step S112: Obtain the local cleaning location based on the dust distribution area and the preset fan blade distribution area; Step S113: Obtain the current brush position; Step S114: Generate a brush movement path based on the current brush position and the local cleaning position; Step S115: Adjust the current cleaning mode according to the local cleaning location to obtain the local cleaning mode; Step S116: Control the cleaning component to move along the brush movement path, control the fan to work according to the cleaning power, and control the cleaning component to clean in the local cleaning mode.

[0011] By adopting the above technical solution, dual verification of current detection and image detection, as well as local cleaning, are achieved. When the current difference ratio reaches the standard, the system further obtains the dust distribution area through fan blade image analysis, identifies local residual dust that cannot be detected by current detection, and generates a brush movement path and local cleaning mode based on the residual position, so that the cleaning component can accurately move to the residual area for targeted cleaning.

[0012] Optionally, it also includes an optimized method for controlling the fan to operate according to the cleaning power and controlling the cleaning components to clean again according to the current cleaning mode, the method including: Step S150: Select the maximum cleaning depth from the cleaning depth range; Step S151: Adjust the current cleaning mode according to the maximum cleaning depth to obtain a powerful cleaning mode; Step S152: Control the fan to work according to the cleaning power, and control the cleaning components to clean in the powerful cleaning mode.

[0013] By adopting the above technical solution, a powerful cleaning mode switching for stubborn dust accumulation is achieved. When the dust accumulation cannot be completely removed under the normal cleaning mode, the system automatically selects the maximum cleaning depth from the cleaning depth range, so that the brush contacts the fan blade at the maximum insertion depth, which can effectively remove stubborn dust that is difficult to remove under normal force.

[0014] Optionally, methods for controlling the air blowing assembly to blow air onto the fan blades according to the basic air blowing pattern include: Step S140: Obtain the upper edge and lower edge of the dust based on the dust distribution area; Step S141: Obtain the blowing boundary based on the upper edge and lower edge of the dust. Step S142: Find the corresponding opening range from the preset air opening mapping table according to the air blowing boundary; Step S143: Control the nozzle to adjust according to the opening range, and control the air blowing assembly to blow air onto the fan blades according to the basic air blowing mode.

[0015] By adopting the above technical solution, precise adaptive control of the blowing range is achieved. The upper and lower edges of the dust are automatically extracted according to the dust distribution area to determine the blowing boundary that needs to be covered. Then, the corresponding opening range is matched from the blowing opening mapping table and the nozzle opening is automatically adjusted so that the blown gas can accurately cover the dust area and reduce the situation where the gas blows into the dust-free fan blade root or the space outside the fan blade outer edge.

[0016] Optionally, a control method is also included when the corresponding opening range cannot be found from the air opening mapping table based on the air opening boundary, the method comprising: Step S1420: When the corresponding opening range cannot be found in the blowing opening mapping table based on the blowing boundary, find the minimum opening range and the minimum blowing range in the blowing opening mapping table. Step S1421: Calculate the range difference based on the minimum blowing range and the blowing boundary; Step S1422: Find the corresponding horizontal compensation distance from the preset horizontal distance mapping table based on the range difference; Step S1423: Control the air blowing assembly to adjust according to the horizontal compensation distance, and control the nozzle to adjust according to the minimum opening range.

[0017] By adopting the above technical solution, when the blowing boundary exceeds the maximum coverage capacity of the nozzle opening range, the system automatically switches to the minimum opening range to maintain the strongest jet impact force. At the same time, the horizontal compensation distance is calculated based on the range difference, and the nozzle is controlled to cover the entire blowing boundary by moving horizontally.

[0018] Optionally, an optimization method is also included, which controls the fan to operate according to the cleaning power when the ratio of the current difference after cleaning is not greater than the loss ratio threshold. This method includes: Step S1160: Obtain the current blade rotation direction; Step S1161: Obtain the reverse blade direction based on the current blade direction; Step S1162: Form a reverse cleaning mode based on the reverse blade rotation and cleaning power; Step S1163: Control the fan to operate in reverse cleaning mode.

[0019] By adopting the above technical solution, the current blade rotation direction is obtained during the cleaning process and a reverse blade rotation direction is generated. The fan is controlled to operate in a reverse rotation mode, so that the cleaning component can brush the blade surface from the opposite direction. Through alternating forward and reverse cleaning, all surfaces of the blade can be fully treated, effectively avoiding the generation of cleaning dead corners.

[0020] Secondly, the present invention provides a cleaning device for a fan and fan blades, which adopts the following technical solution: A cleaning device for a fan and fan blades, applied to a cleaning method for a fan and fan blades as described above, includes a fan, a mounting base, a mounting box disposed on the mounting base, a cleaning component disposed on the mounting box for cleaning the fan blades, and an air blowing component disposed on the mounting box for blowing air onto the fan blades. The fan includes a support base, a fixing member disposed on the support base, a bracket fixedly connected to the support base for support, a mounting plate fixedly connected to the bracket, a motor fixedly connected to the mounting plate, a housing disposed on the mounting plate, and fan blades disposed within the housing. The bracket is provided with reinforcing ribs, the fan blades are connected to the output shaft of the motor, and the outer shell is provided with a connector that is in communication with the outer shell.

[0021] By adopting the above technical solution, the cleaning component can brush the surface of the fan blades, and the air blowing component can work with the cleaning component to spray gas to clean stubborn stains. Cleaning can be completed without frequent manual disassembly and assembly of the fan, effectively improving cleaning efficiency.

[0022] Optionally, the cleaning assembly includes a support base fixedly connected to the mounting box, a support rod fixedly connected to the support base, a sliding block slidably connected to the support rod, a first rotating shaft rotatably connected to the sliding block, a first connecting block fixedly connected to the first rotating shaft, a second rotating shaft rotatably connected to the first connecting block, a second connecting block fixedly connected to the second rotating shaft, and a brush fixedly connected to the second connecting block. The support rod has a sliding groove for the sliding block to slide in, and the sliding block is slidably connected to the sliding groove of the support rod.

[0023] By adopting the above technical solution, the cleaning component is fixed to the mounting box by the support base, ensuring the overall structural stability of the cleaning component. The sliding block slides along the sliding groove to realize the feed and extension movement of the brush towards the fan blade, allowing the brush to accurately adjust the insertion distance according to the current cleaning depth parameters. The first rotating shaft is rotatably connected to the sliding block, allowing the first connecting block to swing around the axis of the first rotating shaft. The second rotating shaft is rotatably connected to the first connecting block, allowing the second connecting block to swing around the axis of the second rotating shaft. Through the two-stage rotational linkage, the brush can achieve multi-angle posture adjustment in three-dimensional space, thereby adapting to fan blade surfaces of different shapes and tilt angles.

[0024] Optionally, the air blowing assembly includes a support column fixedly connected to the mounting box, a sliding column slidably connected to the support column, a guide rod fixedly connected to the sliding column, and a nozzle slidably connected to the guide rod; The sliding column is slidably inserted and slidably connected to the support column to adjust the height of the nozzle, and the nozzle is inserted and slidably connected to the guide rod to adjust the distance between the nozzle and the fan blade.

[0025] By adopting the above technical solution, the sliding column slides inside the support column and can move telescopically along the axis of the support column. The nozzle is slidably connected to the guide rod, so that the nozzle can move horizontally along the axis of the guide rod, thereby enabling precise blowing of air to dust areas at different radial positions.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: The entire process of cleaning fan blades has been automated, forming a closed loop from current quantification detection of dust accumulation, adaptive dry cleaning, current effect verification, jet-assisted cleaning to image secondary verification and local precise supplementary cleaning, thus improving the efficiency of cleaning fan blades. By using a linear mapping mechanism between the current difference ratio and the cleaning depth, an adaptive cleaning strategy is achieved. Combined with multiple cleaning modes such as powerful cleaning mode switching and alternating forward and reverse cleaning, it can adaptively handle various cleaning scenarios with different levels of dust accumulation and different types of dust, minimizing damage to the fan blades while ensuring cleaning effectiveness. Precise air blowing control based on dust distribution area identification, combined with adaptive adjustment of nozzle opening range and horizontal compensation movement to extend coverage, achieves accurate matching of the air blowing range, significantly improving the cleaning efficiency of air blowing. Attached Figure Description

[0027] Figure 1 This is a flowchart of a cleaning method for a fan and fan blades according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a cleaning device for a fan and fan blades according to an embodiment of this application; Figure 3 This is a schematic diagram of the cleaning device and the air blowing device in the embodiments of this application.

[0028] The parts referred to by the numbers in the above attached figures are as follows: 1. Fan; 10. Support base; 11. Fixture; 12. Bracket; 13. Mounting plate; 14. Motor; 15. Housing; 16. Fan blade; 17. Connector; 2. Mounting base; 3. Mounting box; 4. Cleaning assembly; 41. Support seat; 42. Support rod; 43. Sliding block; 44. First rotating shaft; 45. First connecting block; 46. Second rotating shaft; 47. Second connecting block; 48. Brush; 5. Air blowing assembly; 51. Support column; 52. Sliding column; 53. Guide rod; 54. Nozzle. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses a method for cleaning a fan and its blades. (Refer to...) Figure 1 A method for cleaning a fan and its blades includes: Step S1: Obtain the current gear and gear current data table.

[0031] The current gear refers to the speed level at which fan 1 is currently operating, such as low, medium, high, or a specific speed gear number. The current gear is obtained directly by reading the gear output signal from the fan 1 controller.

[0032] The gear current data table refers to a pre-stored mapping table of the corresponding current values ​​of the fan 1 during normal operation at each gear. The gear current data table is obtained by the staff recording the operating current of the motor 14 of the fan 1 during stable operation at each gear before the fan 1 leaves the factory or during installation and commissioning, with the fan blades 16 in a clean state, and storing the gear and current values ​​in the system.

[0033] Step S2: Find the corresponding current reference current from the gear current data table based on the current gear position.

[0034] The current reference current refers to the standard current value that the drive motor 14 should consume when the fan blades 16 are in a clean state at the current speed setting. The current reference current is obtained by matching and querying the speed current data table with the current speed setting as the index, and extracting the current value corresponding to that speed setting as the current reference current.

[0035] Step S3: Obtain the real-time current.

[0036] Real-time current refers to the actual operating current value of fan 1 at the current moment. Real-time current is obtained in real time by a current sensor installed on the power supply line of motor 14.

[0037] Step S4: Calculate the current difference ratio based on the real-time current and the current reference current.

[0038] The current difference ratio refers to the degree of deviation of the real-time current from the current reference current, used to quantify the additional load caused by dust accumulation on the surface of the fan blade 16. The current difference ratio is calculated by subtracting the current reference current from the real-time current, dividing the difference by the current reference current, and finally multiplying by 100%. The formula is: Current difference ratio = ((real-time current - current reference current) / current reference current) × 100%.

[0039] Step S5: When the current difference ratio is greater than the preset loss ratio threshold, obtain the cleaning mode and cleaning depth range.

[0040] The loss ratio threshold refers to the critical proportion of current deviation used to determine whether the amount of dust accumulated on the surface of fan blade 16 has reached a level requiring cleaning. This loss ratio threshold is set by staff based on the correlation between dust accumulation and current changes observed in multiple tests and is stored in the system.

[0041] The cleaning mode refers to the set of parameters used by the cleaning component 4 when cleaning the fan blade 16 in its default state, including the moving speed, reciprocating frequency, and oscillation amplitude of the cleaning component 4. The cleaning mode is preset and stored in the system by the operator based on the mechanical characteristics of the cleaning component 4 and the material of the fan blade 16.

[0042] The cleaning depth range refers to the depth interval within which the cleaning component 4 extends into the fan 1. The magnitude of each depth value within the cleaning depth range indicates the distance the brush 48 extends towards the surface of the fan blade 16. A larger depth value indicates that the brush 48 extends deeper and has a closer contact with the fan blade 16. Even the smallest depth value within the cleaning depth range allows the brush 48 to complete the cleaning of the fan blade 16. The smallest depth value in the cleaning depth range only represents the minimum contact pressure between the brush 48 and the fan blade 16. The cleaning depth range is defined by the operator based on the range of movement that the cleaning component 4 can make.

[0043] Step S6: Select the current cleaning depth from the cleaning depth range according to the current difference ratio.

[0044] The current cleaning depth refers to the actual depth value that the cleaning component 4 should use in this cleaning operation, representing the distance that the brush 48 on the cleaning component 4 extends towards the fan blade 16. The current cleaning depth is selected by establishing a linear mapping relationship between the current difference ratio and the cleaning depth range. The larger the current difference ratio, the more severe the dust accumulation, and therefore the larger the selected current cleaning depth, the deeper the cleaning component 4 extends, and the tighter the contact with the fan blade 16. The linear mapping relationship is as follows: based on the current difference ratio, select the corresponding node from the cleaning depth range according to the corresponding ratio, and use the depth value corresponding to that node as the current cleaning depth. For example, if the cleaning depth range is 30 to 50 and the current difference ratio is 40%, then the current cleaning depth is 38 selected from the cleaning depth range of 30 to 50 based on a 40% current difference ratio. The interval between 30 and 38 accounts for 40% of the cleaning depth range. (For ease of understanding, the numerical values ​​for cleaning depth here are only used as examples and do not represent the actual depth.) Step S7: Adjust the cleaning mode according to the current cleaning depth to obtain the current cleaning mode.

[0045] The current cleaning mode refers to the cleaning mode formed by replacing the original depth distance set in the cleaning mode with the current cleaning depth. The current cleaning mode is obtained by taking the original cleaning mode as a base, replacing the default depth parameter in the original cleaning mode with the current cleaning depth, and keeping other parameters unchanged, thus obtaining the current cleaning mode adapted to the current level of dust accumulation.

[0046] Step S8: Control the fan 1 to work according to the preset cleaning power, and control the cleaning component 4 to clean according to the current cleaning mode.

[0047] Cleaning power refers to the operating state of fan 1 during the cleaning process, when it operates at low power. At this power, the fan blades 16 rotate at a lower speed, ensuring sufficient contact between each fan blade 16 and the brush 48 for cleaning, without causing impact or damage to the brush 48 and the fan blades 16 due to excessive speed. The cleaning power is preset and stored in the system by the operator based on the electrical characteristics and safety requirements of fan 1. The cleaning power is typically 10% to 30% of the rated power of fan 1, and the specific value is obtained through multiple tests and calibrations based on the model of fan 1 and the material of the fan blades 16.

[0048] This also includes: Step S9: Obtain the current after cleaning.

[0049] The post-cleaning current refers to the real-time operating current of the fan 1 drive motor 14, which is collected by the current sensor after the cleaning component 4 completes the cleaning operation according to the current cleaning mode and the fan 1 runs again at the current speed. The method of obtaining the post-cleaning current is the same as the method of obtaining the real-time current in step S3, that is, it is collected in real time by the current sensor installed on the power supply line of the fan 1 drive motor 14.

[0050] Step S10: Calculate the ratio of the difference between the current after cleaning and the current reference current.

[0051] The post-cleaning current difference ratio refers to the degree of deviation of the post-cleaning current from the current reference current after cleaning, and is used to verify whether the cleaning effect meets the standard. The calculation method of the post-cleaning current difference ratio is the same as that of the current difference ratio in step S4: subtract the current reference current from the post-cleaning current to obtain the difference, divide the difference by the current reference current, and finally multiply by 100% to obtain the final value.

[0052] Step S11: When the current difference ratio after cleaning is not greater than the loss ratio threshold, output a preset cleaning completion signal.

[0053] When the current difference ratio after cleaning is not greater than the loss ratio threshold, it indicates that the load of the cleaned fan blade 16 has been restored to a clean state level or is within an acceptable deviation range.

[0054] The cleaning completion signal is a notification signal used to indicate to the staff that the cleaning operation of fan blade 16 of fan 1 has been completed and the effect has met the standards. The cleaning completion signal is preset by the staff and entered into the system. The cleaning completion signal can be output through the sound and light device installed on the cleaning component 4, such as emitting a green light.

[0055] Step S12: When the current difference ratio after cleaning is greater than the loss ratio threshold, obtain the basic blowing mode, current blowing height and target blowing height.

[0056] When the current difference ratio after cleaning is greater than the loss ratio threshold, it indicates that cleaning component 4 alone cannot completely remove the accumulated dust, and stubborn dust still remains on the surface of fan blade 16.

[0057] The basic blowing mode refers to the set of parameters used by the blowing component 5 when blowing air in its default state, including blowing angle, blowing pressure, duration of a single blowing cycle, and number of blowing cycles. The basic blowing mode is preset and stored in the system by the operator based on the nozzle model parameters.

[0058] The current blowing height refers to the vertical distance of the nozzle 54 on the blowing assembly 5 at the current moment. The current blowing height is obtained in real time by a sensor such as a laser rangefinder installed on the blowing assembly 5.

[0059] The target blowing height refers to the vertical distance at which the nozzle 54 on the blowing assembly 5 needs to be located when the blowing assembly 5 is performing blowing work. At this distance, the nozzle 54 can blow air onto the surface of the fan blade 16 more effectively.

[0060] The target blowing height was determined by the staff through multiple experiments based on the blowing angle of the nozzle and the diffusion range of the gas during blowing.

[0061] Step S13: Generate a blowing movement path based on the current blowing height and the target blowing height.

[0062] The air-blowing movement path refers to the trajectory of the air-blowing component 5 as it moves from its current air-blowing height to its target air-blowing height. The air-blowing movement path is generated as follows: starting from the spatial coordinates of the current air-blowing height and ending at the spatial coordinates of the target air-blowing height. Since there are no obstacles obstructing the vertical movement of the nozzle 54, the vertical path from the current air-blowing height to the target air-blowing height is directly used as the air-blowing movement path.

[0063] Step S14: Control the air blowing component 5 to move to the target air blowing height according to the air blowing movement path, and control the air blowing component 5 to blow air onto the fan blade 16 according to the basic air blowing mode.

[0064] The blowing assembly 5 is controlled to move to the target blowing height according to the blowing movement path, and the blowing assembly 5 is controlled to blow air onto the fan blade 16 according to the basic blowing mode, so that the fan blade 16 can be covered by the blown air.

[0065] Step S15: Control the fan 1 to work according to the cleaning power, and control the cleaning component 4 to clean again according to the current cleaning mode.

[0066] The control fan 1 operates according to the cleaning power, and the control cleaning component 4 cleans again according to the current cleaning mode, so that the brush 48 cleans the fan blades 16 after air blowing, making it easier to remove the dust and other stains on the fan blades 16.

[0067] This also includes an optimization method when the ratio of the current difference after cleaning is not greater than the loss ratio threshold, the method comprising: Step S110: When the current difference ratio after cleaning is not greater than the loss ratio threshold, obtain the fan blade image.

[0068] When the current difference ratio after cleaning is less than or equal to the loss ratio threshold, it indicates that the load of fan blade 16 has returned to normal level from the perspective of current. However, current detection can only reflect the overall load situation and cannot identify local residual dust. Therefore, further refined verification through images is required.

[0069] A fan blade image refers to a complete image of the surface of the fan blade 16, captured by an industrial camera. The fan blade image is obtained using an installed industrial camera.

[0070] Step S111: Analyze the fan blade image to obtain the dust distribution area.

[0071] The dust distribution area refers to the set of connected regions occupied by residual dust on the surface of the fan blade 16 in the image. The dust distribution area is obtained by: converting the fan blade image to grayscale, aligning, and performing differential processing on a preset standard image. The standard image is a reference image taken when the surface of the fan blade 16 is completely clean. It is taken by the staff using an industrial camera during the initial installation of the fan 1 or after the fan blade 16 has been thoroughly cleaned and stored in the system. After differential processing, the connected regions in the fan blade image whose pixel grayscale is significantly higher than the corresponding regions in the standard image are extracted. The connected regions are then separated using an image segmentation algorithm to obtain the dust distribution area.

[0072] Step S112: Obtain the local cleaning location based on the dust distribution area and the preset fan blade 16 distribution area.

[0073] The distribution area of ​​fan blade 16 refers to the complete area occupied by fan blade 16 in the image, including the root, middle, and edge portions of fan blade 16. The distribution area of ​​fan blade 16 is pre-stored in the system by the staff through a calibration method, specifically by marking the outline coordinate range of each fan blade 16 in a standard image.

[0074] The local cleaning position refers to the specific spatial coordinates of the dust distribution area on the surface of the fan blade 16, used to guide the cleaning component 4 to move to that position for targeted cleaning. The local cleaning position is obtained as follows: Since the cleaning mode controls the brush 48 to move up and down repeatedly in a vertical position, the cleaning of each fan blade 16 is relatively uniform. After the basic cleaning is completed, the remaining dust areas are all located in basically the same area of ​​each fan blade 16, such as the root of the fan blade 16. Therefore, the position corresponding to the local cleaning position is the actual projected coordinates of the dust distribution area within the outline coordinate range of the fan blade 16. Combined with the installation position and shooting angle of the industrial camera, the actual spatial position corresponding to the surface of the fan blade 16 is calculated through coordinate transformation.

[0075] Step S113: Obtain the current position of the brush 48.

[0076] The current position of brush 48 refers to the spatial coordinates of brush 48 at the current moment. The current position of brush 48 is obtained in real time by a position sensor installed on brush 48.

[0077] Step S114: Generate a brush movement path based on the current brush position 48 and the local cleaning position.

[0078] The brush movement path refers to the trajectory of the cleaning component 4 as it moves from the current brush 48 position to the local cleaning position. The brush movement path is generated as a straight line path starting from the spatial coordinates of the current brush 48 position and ending at the spatial coordinates of the local cleaning position.

[0079] Step S115: Adjust the current cleaning mode according to the local cleaning location to obtain the local cleaning mode.

[0080] The local cleaning mode refers to the set of action parameters of the cleaning component 4 optimized for localized residual dust. The local cleaning mode is obtained by adjusting the cleaning method of the brush 48 to a fixed cleaning mode based on the current cleaning mode. For example, in the current cleaning mode, the brush 48 will move up and down in the vertical direction to ensure uniform cleaning of the fan blade 16, while in the local cleaning mode, the brush 48 will be fixed at the local cleaning position to clean the fan blade 16.

[0081] Step S116: Control the cleaning component 4 to move according to the brush moving path, control the fan 1 to work according to the cleaning power, and control the cleaning component 4 to clean according to the local cleaning mode.

[0082] The cleaning component 4 is controlled to move along the brush movement path, the fan 1 is controlled to work according to the cleaning power, and the cleaning component 4 is controlled to clean in the local cleaning mode, thereby achieving targeted cleaning of local residual dust.

[0083] This includes an optimized method for controlling the fan 1 to operate according to the cleaning power and controlling the cleaning component 4 to clean again according to the current cleaning mode. This method includes: Step S150: Select the maximum cleaning depth from the cleaning depth range.

[0084] The maximum cleaning depth refers to the maximum value within the cleaning depth range. It represents the deepest distance that the brush 48 on the cleaning assembly 4 can extend towards the surface of the fan blade 16. At this depth, the contact pressure between the brush 48 and the fan blade 16 is the greatest, and the bristles of the brush 48 are compressed to the highest degree, thus resulting in the strongest cleaning force. The maximum cleaning depth is obtained by directly reading the upper limit value from the cleaning depth range obtained in step S5. For example, if the cleaning depth range is 30 to 50, then the maximum cleaning depth is 50.

[0085] Step S151: Adjust the current cleaning mode according to the maximum cleaning depth to obtain the powerful cleaning mode.

[0086] The powerful cleaning mode refers to a cleaning mode formed by replacing the current cleaning depth in the current cleaning mode with the maximum cleaning depth. The powerful cleaning mode is obtained by taking the current cleaning mode as a base, replacing the current cleaning depth with the maximum cleaning depth, and keeping other parameters unchanged. This will give you a powerful cleaning mode adapted to the current level of dust accumulation.

[0087] Step S152: Control the fan 1 to work according to the cleaning power, and control the cleaning component 4 to clean in the powerful cleaning mode.

[0088] The control fan 1 operates according to the cleaning power, and the control cleaning component 4 cleans in a powerful cleaning mode. When encountering stubborn stains, the contact pressure between the brush 48 and the fan blade 16 is maximized while the air is blown through the air blowing device, thereby improving the cleaning effect.

[0089] The method for controlling the air blowing assembly 5 to blow air onto the fan blade 16 according to the basic air blowing mode includes: Step S140: Obtain the upper edge and lower edge of the dust based on the dust distribution area.

[0090] The upper edge of the dust refers to the boundary position of the dust distribution area in the radial direction of the fan blade 16, which is the side of the dust area closest to the outer edge of the fan blade 16.

[0091] The lower edge of the dust refers to the boundary position of the dust distribution area in the radial direction of the fan blade 16 that is closest to the rotation center of the fan blade 16, that is, the side of the dust area close to the root of the fan blade 16.

[0092] The upper and lower edges of the dust are obtained as follows: a polar coordinate system is established with the rotation center of fan blade 16 as the origin. All pixel coordinates in the dust distribution area are converted into polar coordinates. The maximum and minimum values ​​of the radius of all pixels are counted. The boundary corresponding to the maximum radius is the upper edge of the dust, and the boundary corresponding to the minimum radius is the lower edge of the dust.

[0093] Step S141: Obtain the blowing boundary based on the upper edge and lower edge of the dust.

[0094] The blowing boundary refers to the radial range that the nozzle 54 needs to cover when the blowing assembly 5 blows air onto the surface of the fan blade 16, that is, the annular area between the lower edge and the upper edge of the dust. The blowing boundary is obtained by taking the lower edge of the dust as the starting boundary and the upper edge of the dust as the ending boundary, and defining the interval between the two as the blowing boundary.

[0095] Step S142: Find the corresponding opening range from the preset air opening mapping table according to the air blowing boundary.

[0096] The air blowing opening mapping table is a mapping table that corresponds to the air blowing boundary and the opening range of the nozzle 54. The air blowing opening mapping table is calibrated by the staff through experiments and stored in the system.

[0097] The opening range refers to the area that the nozzle 54 needs to expand when blowing air onto the air-blowing boundary. The opening range can be directly looked up in the air-blowing opening mapping table using the air-blowing boundary as an index.

[0098] Step S143: Control the nozzle 54 to adjust according to the opening range, and control the air blowing assembly 5 to blow air onto the fan blade 16 according to the basic air blowing mode.

[0099] The control nozzle 54 is adjusted according to the opening range, and the air blowing component 5 is controlled to blow air onto the fan blade 16 according to the basic air blowing mode, so as to accurately blow air to the position that needs to be cleaned. Without wasting output power, it can blow more air per unit area of ​​the stain while spraying out the same amount of air, making it easier to remove dust and other stains.

[0100] This also includes a control method when the corresponding opening range cannot be found from the air opening mapping table based on the air blowing boundary. This method includes: Step S1420: When the corresponding opening range cannot be found in the air opening mapping table based on the air blowing boundary, find the minimum opening range and the minimum air blowing range in the air opening mapping table.

[0101] When the corresponding opening range cannot be found in the air opening mapping table based on the air blowing boundary, it means that the area covered by the air blowing boundary is too small, and the opening of the nozzle 54 cannot open to the corresponding opening range. Since the initial opening range of the nozzle 54 is to cover the entire fan blade 16, the situation where the area covered by the air blowing boundary is too large will not occur.

[0102] The minimum opening range refers to the minimum value of the opening range parameter in the air opening mapping table, corresponding to the narrowest blowing angle of nozzle 54. At this point, the radial range covered by the blown gas on the surface of fan blade 16 is the smallest. The minimum opening range is directly read from the air opening mapping table.

[0103] The minimum blowing range refers to the radial coverage area corresponding to the minimum opening range, that is, the area that the nozzle 54 can cover on the surface of the fan blade 16 when blowing air within the minimum opening range. The minimum blowing range is directly read from the blowing opening mapping table.

[0104] Step S1421: Calculate the range difference based on the minimum blowing range and the blowing boundary.

[0105] The range difference refers to the difference between the actual radial length of the blowing boundary and the radial length of the minimum blowing range. The range difference is calculated by subtracting the minimum blowing range interval length from the radial interval length of the blowing boundary (the upper edge of the dust minus the lower edge of the dust).

[0106] Step S1422: Find the corresponding horizontal compensation distance from the preset horizontal distance mapping table based on the range difference.

[0107] The horizontal distance mapping table is a mapping table that corresponds to the range difference and the horizontal compensation distance. It is pre-calibrated by staff through experiments and stored in the system. The horizontal distance mapping table is established as follows: In the experimental environment, the staff fixes the nozzle 54 at the target blowing height, sets the opening range of the nozzle 54 as the minimum opening range, and tests the actual radial coverage expansion effect corresponding to different horizontal movement distances. The compensation value for each horizontal movement distance is recorded, thus forming the horizontal distance mapping table.

[0108] The horizontal compensation distance refers to the distance that the nozzle 54 moves in the direction of the fan blade 16 to reduce the minimum blowing range and make the minimum blowing range coincide with the blowing boundary. The horizontal compensation distance is obtained by the system from the horizontal distance mapping table using the range difference as the index value.

[0109] Step S1423: Control the air blowing assembly 5 to adjust according to the horizontal compensation distance, and control the nozzle 54 to adjust according to the minimum opening range.

[0110] The air blowing assembly 5 is adjusted according to the horizontal compensation distance, and the nozzle 54 is adjusted according to the minimum opening range. This allows the nozzle 54 to change the blowing distance by moving the nozzle 54 horizontally when the opening can only be adjusted to the minimum range, thereby reducing the radial range of the actual air blowing coverage and making the final air blowing range just match the blowing boundary corresponding to the dust distribution area.

[0111] This also includes an optimization method for controlling fan 1 to operate according to the cleaning power when the current difference ratio after cleaning is not greater than the loss ratio threshold. This method includes: Step S1160: Obtain the current blade rotation direction.

[0112] The current blade rotation direction refers to the rotation direction of the blades 16 of the fan 1 in its current operating state, which is usually clockwise or counterclockwise. The current blade rotation direction is obtained directly by reading the rotation output signal of the fan 1 controller.

[0113] Step S1161: Obtain the reverse blade direction based on the current blade direction.

[0114] The reverse blade rotation direction refers to the rotation direction opposite to the current blade rotation direction. That is, if the current blade rotation is clockwise, the reverse blade rotation direction is counterclockwise; if the current blade rotation is counterclockwise, the reverse blade rotation direction is clockwise. The reverse blade rotation direction is obtained by reversing the direction of the current blade rotation.

[0115] Step S1162: Form a reverse cleaning mode based on the reverse blade rotation and cleaning power.

[0116] The reverse cleaning mode refers to the working mode in which the fan 1 operates at cleaning power and the fan blades 16 rotate in the reverse direction. The reverse cleaning mode is formed by: using the cleaning power as the basic parameter, modifying the operating direction parameter of the fan 1 from the current fan blade direction to the reverse fan blade direction, while keeping other parameters (such as cleaning power value, acceleration and deceleration time, etc.) unchanged, thus forming the reverse cleaning mode.

[0117] Step S1163: Control the fan 1 to operate in reverse cleaning mode.

[0118] The control fan 1 operates in reverse cleaning mode, thereby changing the relative movement direction and contact angle between the cleaning component 4 and the surface of the fan blade 16, so that all surfaces of the fan blade 16 can be thoroughly cleaned.

[0119] Based on the same inventive concept, embodiments of the present invention provide a cleaning device for a fan and fan blades.

[0120] Reference Figure 2A cleaning device for a fan and fan blades includes a fan 1, a mounting base 2, a mounting box 3, a cleaning component 4, and an air blowing component 5.

[0121] Reference Figure 2 and Figure 3 The fan 1 includes a support base 10, a fixing component 11, a bracket 12, a mounting plate 13, a motor 14, a housing 15, and fan blades 16. A reinforcing rib 121 is fixedly connected to the bracket 12, and a connector 17 is fixedly connected to the housing 15.

[0122] The fastener 11 is fixedly connected to the support base 10 to connect the support base 10 to other objects by bolts. The bracket 12 is fixedly connected to the support base 10 for support, and the reinforcing rib 121 is fixedly connected to the bracket 12 to further provide support and enhance the rigidity and toughness of the bracket 12. The mounting plate 13 is fixedly connected to the bracket 12 to mount the motor 14 and the housing 15. The motor 14 is fixedly connected to the mounting plate 13 to drive the fan 1. The housing 15 is fixedly connected to the mounting plate 13 to protect the fan blades 16. The fan blades 16 are drively connected to the output shaft of the motor 14 and are located inside the housing 15. The connector 17 is fixedly connected to the housing 15 and communicates with the housing 15 to deliver airflow. The mounting base 2 and the support base 10 can be freely assembled and disassembled, facilitating cleaning of the fan 1.

[0123] Reference Figure 2 and Figure 3 The mounting box 3 is fixedly connected to the mounting base 2 to install the cleaning assembly 4 and the air blowing assembly 5. The cleaning assembly 4 is installed on the mounting box 3 to clean the fan blades 16. The air blowing assembly 5 is installed on the mounting box 3 to blow air.

[0124] Reference Figure 3 The cleaning component 4 includes a support base 41, a support rod 42, a sliding block 43, a first rotating shaft 44, a first connecting block 45, a second rotating shaft 46, a second connecting block 47, and a brush 48. The support base 41 is fixedly connected to the mounting box 3, and the support rod 42 is fixedly connected to the support base 41. The support rod 42 is fixedly connected to the end of the support base 41 away from the mounting box 3, and a sliding groove is formed on the support rod 42. The sliding block 43 is slidably connected to the sliding groove of the support rod 42. The first rotating shaft 44 is rotatably connected to the sliding block 43. The first connecting block 45 is fixedly connected to the first rotating shaft 44. The second rotating shaft 46 is rotatably connected to the first connecting block 45, and the second connecting block 47 is fixedly connected to the second rotating shaft 46. The brush 48 is fixedly connected to the second connecting block 47.

[0125] Reference Figure 3The air blowing assembly 5 includes a support column 51, a sliding column 52, a guide rod 53, and a nozzle 54. The support column 51 is fixedly connected to the mounting box 3. The sliding column 52 is slidably connected to the support column 51 and communicates with the mounting box 3. The guide rod 53 is fixedly connected to and communicates with the sliding column 52. The nozzle 54 is slidably connected to and communicates with the guide rod 53, and the distance between the nozzle 54 and the fan blade 16 can be adjusted by sliding on the guide rod 53.

[0126] The implementation principle of a cleaning device for a fan and fan blades according to an embodiment of the present invention is as follows: the fan blades 16 are blown by the air blowing assembly 5, and the distance between the nozzle 54 and the fan blades 16 can be adjusted by the sliding of the nozzle 54 in the guide rod 53, and the dirt on the fan blades 16 is brushed off by the brush 48 on the cleaning assembly 4.

[0127] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0128] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for cleaning a fan and its blades, characterized in that, include: Step S1: Obtain the current gear position and gear current data table; Step S2: Find the corresponding current reference current from the gear current data table based on the current gear position; Step S3: Obtain real-time current; Step S4: Calculate the current difference ratio based on the real-time current and the current reference current; Step S5: When the current difference ratio is greater than the preset loss ratio threshold, obtain the cleaning mode and cleaning depth range; Step S6: Select the current cleaning depth from the cleaning depth range according to the current difference ratio; Step S7: Adjust the cleaning mode according to the current cleaning depth to obtain the current cleaning mode; Step S8: Control the fan (1) to work according to the preset cleaning power, and control the cleaning component (4) to clean according to the current cleaning mode.

2. The cleaning method for a fan and fan blades according to claim 1, characterized in that, Also includes: Step S9: Obtain the current after cleaning; Step S10: Calculate the ratio of the difference between the current after cleaning and the current reference current; Step S11: When the current difference ratio after cleaning is not greater than the loss ratio threshold, output a preset cleaning completion signal; Step S12: When the current difference ratio after cleaning is greater than the loss ratio threshold, obtain the basic blowing mode, current blowing height and target blowing height; Step S13: Generate a blowing movement path based on the current blowing height and the target blowing height; Step S14: Control the air blowing assembly (5) to move to the target air blowing height according to the air blowing movement path, and control the air blowing assembly (5) to blow air onto the fan blade (16) according to the basic air blowing mode; Step S15: Control the fan (1) to work according to the cleaning power, and control the cleaning component (4) to clean again according to the current cleaning mode.

3. The cleaning method for a fan and fan blades according to claim 2, characterized in that, It also includes an optimization method when the ratio of the current difference after cleaning is not greater than the loss ratio threshold, the method including: Step S110: When the current difference ratio after cleaning is not greater than the loss ratio threshold, obtain the fan blade image; Step S111: Analyze the fan blade image to obtain the dust distribution area; Step S112: Obtain the local cleaning location based on the dust distribution area and the preset fan blade distribution area; Step S113: Obtain the current brush position; Step S114: Generate a brush movement path based on the current brush position and the local cleaning position; Step S115: Adjust the current cleaning mode according to the local cleaning location to obtain the local cleaning mode; Step S116: Control the cleaning component (4) to move according to the brush moving path, control the fan (1) to work according to the cleaning power, and control the cleaning component (4) to clean according to the local cleaning mode.

4. The cleaning method for a fan and fan blades according to claim 2, characterized in that, It also includes an optimized method for controlling the fan (1) to operate according to the cleaning power and controlling the cleaning component (4) to clean again according to the current cleaning mode, the method comprising: Step S150: Select the maximum cleaning depth from the cleaning depth range; Step S151: Adjust the current cleaning mode according to the maximum cleaning depth to obtain a powerful cleaning mode; Step S152: Control the fan (1) to work according to the cleaning power, and control the cleaning component (4) to clean in the powerful cleaning mode.

5. A method for cleaning a fan and fan blades according to claim 3, characterized in that, The method by which the air blowing assembly (5) blows air onto the fan blades (16) according to the basic air blowing mode includes: Step S140: Obtain the upper edge and lower edge of the dust based on the dust distribution area; Step S141: Obtain the blowing boundary based on the upper edge and lower edge of the dust. Step S142: Find the corresponding opening range from the preset air opening mapping table according to the air blowing boundary; Step S143: Control the nozzle (54) to adjust according to the opening range, and control the air blowing assembly (5) to blow air onto the fan blade (16) according to the basic air blowing mode.

6. A method for cleaning a fan and fan blades according to claim 5, characterized in that, It also includes a control method when the corresponding opening range cannot be found from the air opening mapping table based on the air opening boundary, the method comprising: Step S1420: When the corresponding opening range cannot be found in the blowing opening mapping table based on the blowing boundary, find the minimum opening range and the minimum blowing range in the blowing opening mapping table. Step S1421: Calculate the range difference based on the minimum blowing range and the blowing boundary; Step S1422: Find the corresponding horizontal compensation distance from the preset horizontal distance mapping table based on the range difference; Step S1423: Control the air blowing assembly (5) to adjust according to the horizontal compensation distance, and control the nozzle (54) to adjust according to the minimum opening range.

7. A method for cleaning a fan and fan blades according to claim 3, characterized in that, It also includes an optimization method for controlling the fan (1) to operate according to the cleaning power when the current difference ratio after cleaning is not greater than the loss ratio threshold. This method includes: Step S1160: Obtain the current blade rotation direction; Step S1161: Obtain the reverse blade direction based on the current blade direction; Step S1162: Form a reverse cleaning mode based on the reverse blade rotation and cleaning power; Step S1163: Control the fan (1) to work in reverse cleaning mode.

8. A cleaning device for a fan and fan blades, applied to a cleaning method for a fan and fan blades as described in any one of claims 1 to 7, comprising a fan (1), characterized in that: It also includes a mounting base (2), a mounting box (3) disposed on the mounting base (2), a cleaning assembly (4) disposed on the mounting box (3) for cleaning the fan blades (16), and an air blowing assembly (5) disposed on the mounting box (3) for blowing air onto the fan blades (16). The fan (1) includes a support base (10), a fastener (11) disposed on the support base (10), a bracket (12) fixedly connected to the support base (10) for support, a mounting plate (13) fixedly connected to the bracket (12), a motor (14) fixedly connected to the mounting plate (13), a housing (15) disposed on the mounting plate (13), and fan blades (16) disposed in the housing (15). The bracket (12) is provided with reinforcing ribs (121), the fan blade (16) is connected to the output shaft of the motor (14) for transmission, and the outer shell (15) is provided with a connector (17) and the connector (17) is connected to the outer shell (15).

9. A cleaning device for a fan and fan blades according to claim 8, characterized in that: The cleaning assembly (4) includes a support base (41) fixedly connected to the mounting box (3), a support rod (42) fixedly connected to the support base (41), a sliding block (43) slidably connected to the support rod (42), a first rotating shaft (44) rotatably connected to the sliding block (43), a first connecting block (45) fixedly connected to the first rotating shaft (44), a second rotating shaft (46) rotatably connected to the first connecting block (45), a second connecting block (47) fixedly connected to the second rotating shaft (46), and a brush (48) fixedly connected to the second connecting block (47). The support rod (42) has a sliding groove for sliding block (43) to slide in, and the sliding block (43) is slidably connected in the sliding groove of the support rod (42).

10. A cleaning device for a fan and fan blades according to claim 9, characterized in that: The air blowing assembly (5) includes a support column (51) fixedly connected to the mounting box (3), a sliding column (52) slidably connected to the support column (51), a guide rod (53) fixedly connected to the sliding column (52), and a nozzle (54) slidably connected to the guide rod (53). The sliding column (52) is slidably inserted and slidably connected to the support column (51) to adjust the height of the nozzle (54), and the nozzle (54) is inserted and slidably connected to the guide rod (53) to adjust the distance between the nozzle (54) and the fan blade (16).

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