Grain fan capable of automatically adjusting air inlet

Abstract

The utility model belongs to the technical field of agricultural mechanical equipment, and particularly relates to a grain fan capable of automatically adjusting an air inlet, which comprises a support frame, a fan body is fixedly mounted on the support frame, the air inlet is arranged at the bottom of the fan body, an air outlet is arranged at the top of the fan body, and the air outlet faces an external recovery tank. A push plate assembly is further arranged at the position, corresponding to the wind shield assembly, of the supporting frame, the push plate assembly comprises a rotating shaft rotationally installed on the supporting frame, one end of the rotating shaft is fixedly connected with a push plate driving motor, and the two ends of the rotating shaft are each fixedly provided with a push plate cam. The wind shield assembly is pushed to complete pushing-away and returning actions, the size of the air inlet is adjusted by adopting simple control logic, and the cleanliness of the recovery tank can be guaranteed in different operation environments.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery and equipment technology, and in particular relates to a grain blower with an automatically adjustable air inlet. Background Technology

[0002] Corn harvesters are a common type of agricultural machinery. During harvesting, two opposing rubber rollers squeeze and rub the corn ears to remove the husks. In this process, some kernels will detach from the ears and fall off, along with some broken husks, corn silks, and other impurities, all of which fall into a recycling trough at the bottom of the husking device. If too many impurities fall into the recycling trough, it will take up space, increase the frequency of cleaning the trough, and cause trouble for the subsequent processing of the kernels. Therefore, manufacturers usually install a fan at one end of the recycling trough to blow out the impurities and ensure the cleanliness of the recycling trough.

[0003] The cleanliness of the grain collection trough varies depending on factors such as plot yield, weed quantity, and crop maturity. To adapt to different harvesting conditions, Chinese utility model patent application number 201922190872.X discloses an adjustable airflow fan for corn harvesters. An airflow regulating plate is installed on the air inlet on at least one side of the fan body. One end of the airflow regulating plate is hinged to the end of the fan housing, and the other end is provided with an arc-shaped connecting elongated hole. The position of the airflow regulating plate can be manually adjusted according to the amount of debris to adjust the airflow of the fan. This ensures the cleanliness of the grain collection trough while saving energy and reducing energy consumption.

[0004] However, this manually adjustable structure requires two people to simultaneously push the adjustment plates at both ends of the blower, making the adjustment operation complex and unsuitable for fast-paced harvesting operations. Furthermore, it relies on the operator's practical experience to make adjustments based on the plot conditions before harvesting, which cannot cope with sudden increases or decreases in impurities during harvesting and has poor adaptability. Therefore, it is necessary to develop a grain blower that can automatically adjust the air inlet in real time. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a grain blower with automatic air inlet adjustment, which can realize real-time adjustment of the air inlet size through simple control logic, thereby controlling the air volume of the outlet to suit different working environments.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A grain blower with an automatically adjustable air inlet includes a support frame, on which a blower body is fixedly mounted. The blower body has an air inlet at its bottom and an air outlet at its top, with the air outlet facing an externally located recycling trough. A baffle assembly is rotatably mounted at the air inlet. The blower body is characterized by a pusher assembly located on the support frame at a position corresponding to the baffle assembly. The pusher assembly includes a rotating shaft rotatably mounted on the support frame, with a pusher drive motor fixedly connected to one end of the rotating shaft. A pusher cam is fixedly mounted at each end of the rotating shaft. The rotation of the pusher cams drives the baffle assembly to rotate, thereby adjusting the effective area of ​​the air inlet.

[0008] The following are further optimizations of the above technical solution by this utility model:

[0009] The fan body includes an upper shell and a lower shell arranged at intervals. Side plates are fixed at both ends of the upper shell and the lower shell, and the two side plates connect the upper shell and the lower shell.

[0010] Further optimization: A main shaft is set at the center of the fan body, and the two ends of the main shaft are rotatably mounted on the side plates at both ends. A drive wheel is fixedly connected to one end of the main shaft, and an impeller is fixedly mounted on the main shaft between the two side plates.

[0011] Further optimization: The wind deflector assembly includes a sliding baffle, with a fan-shaped plate fixedly connected to each end of the sliding baffle. A rotating ring is fixedly connected to the fan-shaped plate near its center, and the rotating ring is rotatably mounted on the main shaft.

[0012] Further optimization: The two push plate cams correspond to the two ends of the sliding baffle, one side of the push plate cam is the push stroke part, and the other side is the return stroke part. A push plate is also fixedly connected to the fan plate at the position corresponding to the push plate cam, and the push plate abuts against the push plate cam.

[0013] Further optimization: A control system is also provided, which includes a controller, an image display and a control device, as well as a camera installed on the external recycling tank. The camera is connected to the image display. The controller has a preset execution program and is connected to the control device and the push plate drive motor respectively.

[0014] Further optimization: A limit spring is attached to the side of the fan-shaped plate closest to the air inlet, and the end of the limit spring away from the fan-shaped plate is attached to the support frame.

[0015] Further optimization: The sliding baffle is located on the outside of the lower shell, and the length of the sliding baffle is greater than the length of the fan body. The fan-shaped plate is located on the outside of the two side plates, and guide components are provided on the outside of the side plates at positions corresponding to the sliding baffle.

[0016] Further optimization: The guide assembly includes a rotating arm, which is rotatably mounted on the side plate at its middle position. A guide wheel is rotatably connected to the lower end of the rotating arm, and a guide spring is hung on the upper end of the rotating arm. A mounting seat is fixedly connected to the side plate at the position corresponding to the guide spring, and the end of the guide spring away from the rotating arm is hung on the mounting seat.

[0017] The present invention adopts the above technical solution and has the following beneficial effects:

[0018] This utility model adopts a structure of motor plus cam. During the process of the motor driving the cam to rotate one revolution, the wind deflector assembly can be pushed away and returned to its original position. Only a simple control logic is needed to set the motor to perform a single-direction, fixed rotation angle action, without the need to switch directions or control the action stroke.

[0019] The motor of this invention rotates in one direction and operates at a constant speed, which reduces the impact on the transmission components and avoids damage to the drive components caused by frequent switching of the rotation direction. This effectively extends the service life of the drive and transmission components and reduces the failure rate and maintenance costs.

[0020] This utility model is equipped with a control system, which allows operators to monitor the situation inside the recycling tank in real time through video image information. The system controls the rotation of the baffle assembly and adjusts the size of the air inlet according to the amount of impurities. When there are few impurities, the fan operates with low energy consumption to save energy, while when there are many impurities, it operates with high energy consumption to blow out the impurities in the recycling tank in time to ensure the cleanliness of the recycling tank.

[0021] The wind baffle assembly of this utility model is set on the outer side of the lower shell. The wind baffle assembly slides along the outer side of the lower shell, which can not only adjust the size of the air inlet, but also avoid disturbing the air field inside the fan and affecting the performance.

[0022] This utility model provides a guide wheel between the fan body and the baffle assembly. The guide wheel is always pressed against the baffle assembly by the action of the guide spring, so that there is a suitable gap between the fan body and the baffle assembly. This ensures that the baffle assembly can move normally without jamming, and also prevents the gap between the fan body and the baffle assembly from being too large, which would affect the performance.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a perspective view of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a perspective view of the overall structure of an embodiment of the present utility model from another angle;

[0026] Figure 3This is a perspective view of the fan body according to an embodiment of the present utility model;

[0027] Figure 4 This is a perspective view of the windshield assembly according to an embodiment of the present utility model;

[0028] Figure 5 This is a perspective view of the support frame and push plate assembly according to an embodiment of the present utility model;

[0029] Figure 6 This is a perspective view of the guide component according to an embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the control system of an embodiment of the present invention.

[0031] In the diagram: 1. Support frame; 101. Bottom beam; 102. Vertical beam; 103. Horizontal beam; 104. Reinforcing beam; 105. Diagonal beam; 2. Fan body; 201. Upper shell; 202. Lower shell; 203. Side plate; 204. Mounting plate; 205. Air inlet; 206. Air outlet; 207. Main shaft; 208. Impeller; 3. Drive wheel; 4. Baffle assembly; 401. Sliding baffle; 402. Fan-shaped plate; 403. Rotation. 404. Ring; 5. Push plate; 6. Push plate assembly; 7. Rotating shaft; 8. Push plate cam; 9. Push stroke section; 10. Return stroke section; 11. Push plate drive motor; 12. Control system; 13. Controller; 14. Camera; 15. Image display; 16. Control device; 17. Limit spring; 18. Guide assembly; 19. Rotating arm; 10. Guide wheel; 11. Guide spring; 12. Hanging seat. Detailed Implementation

[0032] like Figure 1 As shown, a grain blower with an automatically adjustable air inlet includes a support frame 1, on which a blower body 2 is fixedly installed. The blower body 2 has an air inlet 205 at the bottom and an air outlet 206 at the top. The air outlet 206 faces an externally located recycling tank. Air enters through the air inlet 205 and is accelerated inside the blower body 2. The high-speed air is discharged from the air outlet 206, blowing out lighter impurities such as broken husks and corn silk from the recycling tank, thereby ensuring the cleanliness of the recycling tank and facilitating subsequent grain processing operations.

[0033] A baffle assembly 4 is rotatably installed at the air inlet 205 of the fan body 2. The baffle assembly 4 is arranged parallel to the fan body 2. A push plate assembly 5 is also provided on the support frame 1 at a position corresponding to the baffle assembly 4. The push plate assembly 5 pushes the baffle assembly 4 to rotate, thereby adjusting the size of the effective area of ​​the air inlet 205 and controlling the air volume at the air outlet 206 to adapt to different usage environments.

[0034] In the initial state, the baffle assembly 4 is located at the bottom of its movement range, and most of the air inlet 205 is blocked, resulting in a small air inlet area and a correspondingly small air volume at the air outlet 206. This is suitable for situations where there are few impurities in the recycling tank. At this time, the energy consumption of the blower body 2 is low, allowing the power output of the power source to supply more power to other working parts and improve work efficiency. When there are many impurities in the recycling tank, the pusher assembly 5 is activated to push the baffle assembly 4 to rotate upward. The baffle assembly 4 gradually moves away from the air inlet 205, increasing the effective area of ​​the air inlet 205 and increasing the air volume at the air outlet 206, which blows out the impurities in the recycling tank.

[0035] like Figure 2 As shown, the fan body 2 includes an upper shell 201 and a lower shell 202 arranged at intervals. Side plates 203 are fixedly installed at both ends of the upper shell 201 and the lower shell 202, respectively. The two side plates 203 connect the upper shell 201 and the lower shell 202 to form a volute shape, which is conducive to the acceleration of airflow inside the fan body 2. An mounting plate 204 is fixedly connected to the upper shell 201. The mounting plate 204 is fixedly installed on the support frame 1. The gap between the upper shell 201 and the lower shell 202 near the bottom is the air inlet 205, and the gap near the top is the air outlet 206. The length of the air outlet 206 matches the length of the external recycling tank, ensuring that the high-speed air from the air outlet 206 can reach every corner of the recycling tank, thereby improving the cleaning effect.

[0036] A main shaft 207 is provided at the center of the fan body 2. The two ends of the main shaft 207 are rotatably mounted on the side plates 203 at both ends via bearing seats. An impeller 208 is fixedly installed on the main shaft 207 between the two side plates 203. The impeller 208 rotates with the main shaft 207, driving air to enter the fan body 2 from the air inlet 205. After the air is accelerated inside the fan body 2, it is discharged from the air outlet 206.

[0037] One end of the main shaft 207 is fixedly connected to a drive wheel 3. The drive wheel 3 is connected to an external power source, which is the engine of the corn harvester. The engine drives the drive wheel 3 to rotate through the transmission system, thereby driving the main shaft 207 and the impeller 208 to rotate.

[0038] In this embodiment, the drive wheel 3 can be selected from one of pulleys, sprockets or gears. The transmission connection between the drive wheel 3 and the external power source can be selected from one of belt drive, chain drive or gear meshing drive. When working, the engine provides the power source, which drives the drive wheel 3 to rotate through the transmission system, thereby driving the main shaft 207 and impeller 208 to rotate.

[0039] In addition to this embodiment, the drive wheel 3 can also be a separately configured motor. The power output end of the motor is directly fixedly connected to one end of the main shaft 207 to drive the main shaft 207 to rotate, thereby driving the impeller 208 to rotate.

[0040] like Figure 3 As shown, the wind deflector assembly 4 includes a sliding baffle 401. The cross-sectional shape of the sliding baffle 401 is adapted to the cross-sectional shape of the air inlet 205 and is arranged parallel to the fan body 2. A fan-shaped plate 402 is fixedly connected to each end of the sliding baffle 401. Specifically, two connecting seats are fixedly connected to each end of the sliding baffle 401. Mounting holes are opened on the fan-shaped plate 402 at positions corresponding to the connecting seats. Bolts pass through the connecting seats and mounting holes to detachably and fix the sliding baffle 401 and the fan-shaped plate 402 together, which facilitates installation and subsequent replacement of individual parts, reducing maintenance costs.

[0041] Furthermore, the mounting holes on the sector plate 402 can be arc-shaped elongated holes. The mounting bolts drive the sliding baffle 401 to slide along the arc-shaped elongated holes, making the relative position of the sliding baffle 401 and the sector plate 402 manually adjustable. By combining manual and automatic adjustment modes, the adjustment range of the effective area of ​​the air inlet 205 is further increased, enabling the product to adapt to more usage scenarios and improve the user experience.

[0042] A rotating ring 403 is fixedly connected to the fan-shaped plate 402 near the center. The rotating ring 403 is rotatably mounted on the main shaft 207. In this embodiment, the connection between the rotating ring 403 and the main shaft 207 can be a bearing or a nylon bushing structure to ensure that the rotating ring 403 can rotate freely on the main shaft 207.

[0043] The sliding baffle 401 is located on the outside of the lower shell 202. The length of the sliding baffle 401 is greater than the length of the fan body 2. The fan-shaped plate 402 is located on the outside of the two side plates 203. The rotating ring 403 drives the sliding baffle 401 to rotate on the main shaft 207, thereby driving the sliding baffle 401 to slide along the outer side of the lower shell 202. This can both adjust the size of the air inlet 205 and prevent the sliding baffle 401 from being installed inside the fan body 2 and disturbing the air field inside the fan body 2, thus affecting the performance.

[0044] like Figure 4As shown, the pusher assembly 5 includes a rotating shaft 501, which is arranged parallel to the fan body 2 and rotatably mounted on the support frame 1. At the two ends of the rotating shaft 501, a pusher cam 502 is fixedly installed at the corresponding positions of the two sliding baffles 401. Relative to the center of the rotating shaft 501, the radial dimension of the pusher cam 502 is larger in the semi-circular range on one side, which is the push stroke part 503, and the radial dimension of the other semi-circular range is smaller, which is the return stroke part 504. A pusher plate 404 is also fixedly connected to the fan-shaped plate 402 at the position corresponding to the pusher cam 502, and the pusher plate 404 abuts against the pusher cam 502.

[0045] A limiting spring 8 is attached to the side of the fan-shaped plate 402 near the air inlet 205. The end of the limiting spring 8 away from the fan-shaped plate 402 is attached to the support frame 1. When the push plate drive motor 6 is not working, the limiting spring 8 serves two purposes: firstly, to ensure that the baffle assembly 4 does not rotate with the main shaft 207 due to inertia and remains in its initial position; secondly, to prevent the baffle assembly 4 from swinging and shifting due to the vibration of the whole machine, which would cause the effective area of ​​the air inlet 205 to change frequently, thereby affecting the air volume of the air outlet 206 and reducing the performance. When the push plate drive motor 6 is working, it drives the push plate cam 502 to rotate one revolution. When the return part 504 of the push plate cam 502 contacts the push plate 404, the limiting spring 8 assists the baffle assembly 4 to return to its original position.

[0046] One end of the rotating shaft 501 is fixedly connected to a push plate drive motor 6. The push plate drive motor 6 drives the rotating shaft 501 to rotate, which in turn drives the push plate cam 502 to rotate. When the push stroke part 503 rotates to contact the push plate 404, it pushes the wind deflector assembly 4 to rotate upward. The wind deflector assembly 4 gradually moves away from the air inlet 205, and the effective area of ​​the air inlet 205 increases. When the return stroke part 504 rotates to contact the push plate 404, the wind deflector assembly 4 returns to its original position under the action of the limit spring 8, and the effective area of ​​the air inlet 205 decreases.

[0047] In this embodiment, the push plate drive motor 6 is a servo motor or a stepper motor. Through pulse signals or position signals, the rotation angle of the motor can be precisely controlled, thereby precisely controlling the adjustment action of the baffle assembly 4 on the effective area of ​​the air inlet 205.

[0048] like Figure 7 As shown, the grain blower of this utility model is also equipped with a control system 7. The control system 7 includes a controller 701, an image display 703 and a control device 704 installed in the cab, and a camera 702 installed on the external recycling tank. The camera 702 is connected to the image display 703 by signal. The controller 701 has a preset execution program and is connected to the control device 704 and the push plate drive motor 6 by signal.

[0049] In this embodiment, the controller 701 is integrated with the main controller of the corn harvester. The image display 703 is an LCD screen. The control device 704 is a rotary switch or rocker switch, or it can be an operation button integrated on the image display 703. The camera 702 collects the image signal in the recycling tank and transmits it to the image display 703. The operator judges based on the video image displayed on the image display 703. If there are many impurities in the recycling tank, the operator operates the control device 704 and transmits the operation signal to the controller 701. The controller 701 controls the push plate drive motor 6 to rotate one revolution and then stop. It pushes the baffle assembly 4 to rotate upward and then return to its original position, completing one cycle of adjustment of the effective area of ​​the air inlet 205.

[0050] In the prior art, the swinging of the wind deflector assembly 4 is usually achieved by extending and retracting a telescopic push rod or switching the forward and reverse directions of a motor. This invention uses a motor plus cam structure, which can push the wind deflector assembly 4 away and return it to its original position during the process of the motor driving the cam to rotate one revolution. Compared with the prior art, the solution of this invention only requires setting the push plate to drive the motor 6 to perform a single-direction, fixed rotation angle action, without the need to switch directions or control the action stroke. The control logic is simpler, and there is no need to wait for the forward action to completely stop before starting the reverse action, making the swinging process more continuous and smooth.

[0051] Compared with existing technologies, the unidirectional operation of the motor is a uniform speed process, which reduces the impact on transmission components such as bearings. It also avoids damage to drive components caused by frequent switching of operating direction, effectively extending the service life of drive and transmission components and reducing failure rate and maintenance costs.

[0052] The control system 7 has two operating positions: "low" and "high" on the control device 704. Correspondingly, the controller 701 has two preset execution programs. When the control device 704 is adjusted to the "low" position, the push plate drive motor 6 operates rapidly. In this state, the air inlet 205 is at its maximum opening for a shorter period of time. When the control device 704 is adjusted to the "high" position, the push plate drive motor 6 operates slowly. In this state, the air inlet 205 is at its maximum opening for a longer period of time, which can more thoroughly clean the debris in the recycling tank. This allows for real-time adjustment of the size of the air inlet 205, avoiding power waste and effectively cleaning the impurities in the recycling tank, facilitating subsequent grain processing operations.

[0053] Based on this working principle, the controller 701 has multiple preset execution programs, which can realize real-time stepless adjustment of the size of the air inlet 205, further improving the performance and enhancing the user experience.

[0054] like Figure 1As shown, the support frame 1 includes two parallel and spaced bottom beams 101. The bottom beams 101 are parallel to the ground and perpendicular to the fan body 2. A vertical beam 102 is fixedly connected to the upper surface of the bottom beams 101. The vertical beams 102 are perpendicular to the ground. A horizontal beam 103 is fixedly connected to the top of the vertical beams 102. The two vertical beams 102 are located at the two ends of the horizontal beam 103. The fan body 2 is fixedly installed on the horizontal beam 103.

[0055] Several reinforcing beams 104 are also provided between the two bottom beams 101. The reinforcing beams 104 are arranged parallel to the crossbeams 103 and their two ends are fixedly connected to the two bottom beams 101 respectively. An inclined beam 105 is fixedly connected to one end of the upper surface of the bottom beam 101 away from the fan body 2. The other end of the inclined beam 105 is fixedly connected to the vertical beam 102. The reinforcing beams 104 and the inclined beams 105 are used to increase the overall structural strength of the support frame 1.

[0056] like Figure 6 As shown, a guide assembly 9 is provided on the outer side of the side plate 203 at a position corresponding to the sliding baffle 401. The guide assembly 9 includes a rotating arm 901, which is rotatably mounted on the side plate 203 at its middle position. A guide wheel 902 is rotatably connected to the lower end of the rotating arm 901, and a guide spring 903 is hooked to the upper end of the rotating arm 901. A mounting seat 904 is fixedly connected to the side plate 203 at a position corresponding to the guide spring 903. The end of the guide spring 903 away from the rotating arm 901 is hooked to the mounting seat 904. The guide spring 903 pulls the rotating arm 901 to rotate, causing the lower end of the rotating arm 901 to move closer to the sliding baffle 401. This ensures that the guide wheel 902 is always pressed against the sliding baffle 401. The outer edge of the guide wheel 902 extends beyond the outer edge of the lower shell 202, thus leaving a certain gap between the sliding baffle 401 and the lower shell 202 to prevent interference and jamming between the sliding baffle 401 and the lower shell 202 during movement, which would affect the performance.

[0057] By adjusting the preload of the guide spring 903, the size of the guide wheel 902 extending beyond the outer edge of the lower shell 202 can be adjusted, thereby adjusting the size of the gap between the sliding baffle 401 and the lower shell 202. This ensures that the sliding baffle 401 moves normally without jamming, and also prevents the gap between the sliding baffle 401 and the lower shell 202 from being too large and affecting the air intake.

[0058] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A kind of automatic adjustment inlet of grain fan, including support frame (1), fan body (2) is fixedly installed on support frame (1), it is characterized in that: The fan body (2) is provided with an air inlet (205) at the bottom and an air outlet (206) at the top, the air outlet (206) faces the externally provided recovery groove, a wind baffle assembly (4) is rotatably installed at the air inlet (205), a push plate assembly (5) is further provided at the position corresponding to the wind baffle assembly (4) on the support frame (1), the push plate assembly (5) comprises a rotating shaft (501) rotatably installed on the support frame (1), one end of the rotating shaft (501) is fixedly connected with a push plate driving motor (6), and one push plate cam (502) is fixedly installed at each end of the rotating shaft (501), the push plate cam (502) rotates to drive the wind baffle assembly (4) to rotate, and is used for adjusting the size of the effective area of the air inlet (205).

2. A grain fan with automatically adjusted inlet according to claim 1, characterized in that: The fan body (2) comprises an upper shell (201) and a lower shell (202) which are arranged at intervals, and side plates (203) are fixedly arranged at both ends of the upper shell (201) and the lower shell (202), and the two side plates (203) connect the upper shell (201) and the lower shell (202).

3. A kernel fan with automatic adjustment of the inlet according to claim 2, characterized in that: A main shaft (207) is arranged at the center position of the fan body (2), both ends of the main shaft (207) are rotatably installed on the side plates (203) at both ends, one end of the main shaft (207) is fixedly connected with a driving wheel (3), and a impeller (208) is fixedly installed on the main shaft (207) at a position between the two side plates (203).

4. A grain fan with automatically adjusted inlet according to claim 3, characterized in that: The wind baffle assembly (4) comprises a sliding baffle (401), one fan-shaped plate (402) is fixedly connected to each end of the sliding baffle (401), a rotating ring (403) is fixedly connected to the position close to the center of the fan-shaped plate (402), and the rotating ring (403) is rotatably installed on the main shaft (207).

5. A kernel fan with automatic adjustment of the inlet according to claim 4, characterized in that: The two push plate cams (502) correspond to the positions at both ends of the sliding baffle (401) respectively, one side of the push plate cam (502) is a push stroke part (503), the other side is a return stroke part (504), a push plate (404) is further fixedly connected to the position on the fan-shaped plate (402) corresponding to the push plate cam (502), and the push plate (404) abuts against the push plate cam (502).

6. A kernel fan with automatic adjustment of the inlet according to claim 5, characterized in that: A control system (7) is further provided, the control system (7) comprises a controller (701), an image display (703), a control device (704), and a camera (702) installed on the externally provided recovery groove, the camera (702) is signal connected with the image display (703), an execution program is pre-set in the controller (701), and the controller (701) is signal connected with the control device (704) and the push plate driving motor (6) respectively.

7. A kernel fan with automatically adjusted inlet according to claim 6, characterized in that: A limiting spring (8) is hung on one side of the fan-shaped plate (402) close to the air inlet (205), and one end of the limiting spring (8) away from the fan-shaped plate (402) is hung on the support frame (1).

8. A kernel fan with automatic adjustment of the inlet according to claim 7, characterized in that: The sliding baffle (401) is arranged outside the lower shell (202), the length of the sliding baffle (401) is greater than the length of the fan body (2), the fan-shaped plate (402) is arranged outside the two side plates (203), and a guide assembly (9) is arranged at the position outside the side plate (203) corresponding to the sliding baffle (401).

9. A kernel fan with automatically adjusted inlet according to claim 8, characterized in that: The guide assembly (9) comprises a rotating arm (901), the middle position of the rotating arm (901) is rotatably installed on the side plate (203), the lower end of the rotating arm (901) is rotatably connected with a guide wheel (902), the upper end of the rotating arm (901) is hung with a guide spring (903), the side plate (203) is fixedly connected with a hanging seat (904) at the position corresponding to the guide spring (903), one end of the guide spring (903) away from the rotating arm (901) is hung on the hanging seat (904), and the outer edge of the guide wheel (902) exceeds the outer edge of the lower shell (202).

Images