A winnower for matcha processing

Abstract

The application relates to the technical field of tea processing equipment, and discloses a winnowing machine for processing matcha, which comprises a motor, a transmission shaft, a belt pulley set, a driving shaft and a support. The transmission shaft and the driving shaft are driven to rotate by the motor. The driving shaft is connected with a cam. A grading groove is arranged in the cam to drive a cross rod to reciprocate. The cross rod drives a material uniformizing plate provided with comb teeth to swing and scatter raw materials. A gas flow guiding structure comprising a contraction section, a throat section and an expansion section is arranged below the material uniformizing plate. A vortex groove is arranged on the inner wall of the expansion section to assist gas flow separation. An intercepting mechanism composed of a connecting rod, a spring and elastic hook teeth is arranged in the winnowing cavity. The application solves the problem of raw material caking by mechanical vibration, improves separation precision by using a Venturi vortex airflow, and effectively removes flat yellow pieces by cooperating with a self-weight mechanical intercepting mechanism, so that the efficiency of matcha winnowing and the purity of finished products are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of tea processing equipment technology, specifically to an air separator for matcha processing. Background Technology

[0002] As a tea product loved by consumers, matcha's processing technology places extremely high demands on the purity of raw materials. In the production process of matcha, wind separation is a crucial step, mainly used to separate stems, yellow leaves, and other impurities from high-quality tea leaves. Traditional wind separation equipment usually utilizes the difference in specific gravity of materials and uses wind power to float them for separation. However, in actual production, this single wind separation method often faces many challenges.

[0003] Currently, before matcha raw materials enter the air separation equipment, they are prone to clumping due to their own moisture content or static electricity. When clumped materials directly enter the air separation channel, not only can a uniform material layer not be formed, but the airflow also cannot penetrate the material clumps, making it impossible to separate the impurities wrapped inside the clumps. This seriously affects the thoroughness of air separation. Existing air separation equipment mostly uses a straight-through air duct with a single airflow trajectory. For some light but flat yellow leaf impurities, it is difficult to effectively distinguish them from the equally light high-quality tea leaves by relying solely on a straight airflow. As a result, the yellow leaves are easily collected along with the tea leaves, reducing the quality of the finished product. These flat impurities are also easy to adhere to the inner wall of the equipment or block the channel, making cleaning difficult and affecting the continuity of production.

[0004] Therefore, this invention proposes an air separator for matcha processing to address the shortcomings of existing technologies. Summary of the Invention

[0005] In view of the problems in the existing technology of air separators for matcha processing, such as the easy agglomeration and accumulation of feed material leading to incomplete separation, and the lack of effective separation methods for flat yellow leaf impurities, resulting in low purity of the finished product and easy contamination of impurities, the present invention aims to provide an air separator for matcha processing with an improved structure that can effectively solve the above problems.

[0006] This invention provides an air separator for matcha processing. The main structure includes a motor, a transmission shaft, a pulley set, a drive shaft, and a support frame. It also integrates a feeding and equalization component and an air separation component. The motor is a power source with its output end fixedly connected to the transmission shaft. The transmission shaft drives the drive shaft mounted on the support frame to rotate through the pulley set.

[0007] In the device, a cam is fixedly connected to the outer surface of the drive shaft. A grading groove with a special trajectory is opened on the inner wall of the cam. A crossbar is slidably connected in the grading groove. A material leveling plate is fixedly connected to the outer surface of the crossbar through a connector. Multiple combing teeth are fixedly connected to the inner wall of the material leveling plate. The crossbar can perform horizontal reciprocating motion driven by the grading groove, thereby driving the material leveling plate and the combing teeth to swing and disperse the raw materials. An airflow guiding structure is provided below the material leveling plate. The airflow guiding structure is connected to the air separation chamber. An interception mechanism is provided inside the air separation chamber.

[0008] Preferably, the inner wall of the crossbar is provided with a manual bolt, which is threaded to the crossbar. By adjusting the manual bolt, the fixed position of the crossbar in the grading tank can be changed, thereby adjusting the eccentricity to adapt to the vibration and agitation amplitude required for different raw materials.

[0009] Preferably, the airflow guiding structure is designed as a Venturi tube flow channel, including a feed inlet, a sorting channel and an air supply pipe. The bottom end of the feed inlet is connected to the sorting channel. The inner wall of the sorting channel is connected in sequence to a contraction section, a throat section and an expansion section. One end of the air supply pipe is connected to the contraction section and the other end is fixed to the outer wall of the air separation chamber to provide a power source for the system.

[0010] Preferably, the inner wall of the expansion section is provided with vortex grooves, which are used to form directional vortex airflow in the airflow deceleration and diffusion area, thereby enhancing the separation effect of light and heavy materials by utilizing centrifugal force.

[0011] Preferably, the interception mechanism includes a partition plate, a support plate, a rotating shaft, and a connecting rod. The partition plate is fixed to the inner wall of the air separation chamber, and the top support plate is rotatably connected to the rotating shaft on the inner wall of the support plate. The outer surface of the rotating shaft is rotatably connected to the connecting rod, forming a swingable interception structure.

[0012] Preferably, the outer surface of the connecting rod is rotatably connected with elastic hook teeth, which extend along the airflow direction and are specifically designed to physically hook and intercept flat impurities in the airflow.

[0013] Preferably, a connecting column is fixedly connected to the inner wall of the connecting rod, and a spring is fixedly connected between the connecting column and the outer wall of the support plate. The spring is used to provide the necessary reset tension after the connecting rod flips over and unloads due to the weight of impurities, so as to ensure that the interception mechanism can continue to work.

[0014] Preferably, the connector is fixedly connected to the end of the crossbar, and the connector passes through the side wall of the feed inlet and is connected to the material leveling plate located inside, thereby realizing the effective linkage between external drive and internal material leveling.

[0015] This invention provides an air separator for matcha processing. It has the following beneficial effects:

[0016] 1. This invention, by setting up a power transmission system consisting of a motor, transmission shaft, pulley assembly and drive shaft, and cooperating with a cam with grading grooves and an adjustable crossbar to drive the equalization plate to reciprocate, utilizes multiple combing teeth on the inner wall of the equalization plate to mechanically disperse and comb the falling matcha raw materials, solves the problem in the prior art that matcha raw materials are prone to clumping and accumulating during feeding, resulting in uneven material layer thickness and thus affecting the thoroughness of subsequent air separation. It achieves the goal of forming a uniform thin material layer, ensuring that the airflow can act evenly on each tea particle, and significantly improving the accuracy and efficiency of air separation.

[0017] 2. This invention solves the problems of single airflow trajectory and incomplete separation of light and heavy materials in the prior art by setting a Venturi tube-type airflow guiding structure including a contraction section, a throat section and an expansion section below the feeding and equalizing component, and opening a vortex groove on the inner wall of the expansion section. It utilizes the directional vortex airflow generated by the contraction acceleration, throat speed stabilization and expansion deceleration in combination with the vortex groove. This achieves the goal of making light and high-quality tea leaves move quickly with the central mainstream, while heavy impurities are thrown to the groove wall by inertia and vortex centrifugal force to achieve separation, and greatly improves the impurity removal rate.

[0018] 3. This invention, by setting up an interception mechanism inside the air separation chamber, consisting of a partition plate, a support plate, a rotating shaft, a connecting rod, a spring, and elastic hook teeth, uses the elastic hook teeth to physically hook and intercept the flat yellow flakes floating with the airflow. The accumulated weight of the yellow flakes overcomes the spring tension, enabling the connecting rod to flip and automatically unload and reset. This solves the problem in the prior art that flat yellow flakes, due to their large windward area and light weight, are difficult to effectively remove by wind or gravity alone and are easily mixed into the finished product. It achieves the removal of yellow flake impurities, continuous impurity removal without manual intervention, and effectively improves the purity and quality of the finished matcha product. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the air separation chamber of the present invention;

[0022] Figure 4 This is an enlarged view of the cam at point A in this invention;

[0023] Figure 5 This is an enlarged view of the connecting rod at point B in this invention;

[0024] Figure 6 This is an exploded view of the present invention;

[0025] Figure 7 This is an enlarged view of the manual bolt at point C in this invention;

[0026] Figure 8 This is a sectional view of the cam of the present invention;

[0027] Figure 9 This is a schematic diagram of the bottom structure of the present invention;

[0028] Figure 10 This is another schematic diagram of the bottom structure of the present invention.

[0029] The components include: 1. Motor; 2. Interception mechanism; 201. Air separation chamber; 202. Separator plate; 203. Support plate; 204. Rotating shaft; 205. Connecting rod; 206. Connecting column; 207. Spring; 208. Elastic hook tooth; 3. Airflow guiding structure; 301. Feed inlet; 302. Sorting channel; 303. Contraction section; 304. Throat section; 305. Expansion section; 306. Vortex groove; 307. Air supply duct; 4. Drive shaft; 5. Pulley set; 6. Drive shaft; 7. Bracket; 8. Cam; 9. Grading groove; 10. Crossbar; 11. Manual bolt; 12. Connecting piece; 13. Material equalization plate; 14. Combing tooth. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example:

[0032] Please refer to Figures 1 to 10 This invention provides a high-efficiency air separator for matcha processing, comprising a motor 1, a transmission shaft 4, a pulley set 5, a drive shaft 6, and a support 7. The motor 1 serves as the power source for the entire device, and its output end is fixedly connected to one end of the transmission shaft 4. The outer surface of the transmission shaft 4 is fixedly connected to the driving pulley of the pulley set 5, while the inner wall of the driven pulley portion of the pulley set 5 is fixedly connected to the drive shaft 6. After the motor 1 starts, it drives the transmission shaft 4 to rotate, which in turn drives the drive shaft 6 to rotate synchronously through the pulley set 5. The outer surface of the drive shaft 6 is rotatably connected to the support 7, and the support 7 is fixedly installed on the device frame to provide a stable support point, ensuring that the drive shaft 6 maintains axial stability during operation.

[0033] Please refer to Figure 4 , Figure 7 and Figure 8As a key component for motion conversion, the cam 8 has a grading groove 9 on its inner wall. A crossbar 10 is slidably connected in the grading groove 9. The crossbar 10 is restricted by the grading groove 9. When the drive shaft 6 rotates, it will drive the adjustable crossbar 10 on the inner wall of the cam 8 to perform horizontal reciprocating motion. The outer surface of the crossbar 10 drives the rotating material equalization plate 13 through the connecting piece 12, so that the material equalization plate 13 can swing synchronously with the crossbar 10. Multiple combing teeth 14 are fixedly connected to the inner wall of the material equalization plate 13 facing the direction of material falling. The high-frequency reciprocating swing of the material equalization plate 13, in conjunction with the combing teeth 14, is used to initially break up and comb the clumps of matcha raw materials conveyed by the conveyor belt, and then send them into the air separation process below to complete the task of removing leaf stems, veins, yellow leaves and impurities.

[0034] Please refer to Figure 5 , Figure 6 and Figure 7 In order to further improve the adaptability of the device to different batches of raw materials, a manual bolt 11 is installed on the inner wall of the crossbar 10. The manual bolt 11 and the crossbar 10 are connected by threads. By loosening the manual bolt 11 and moving the position of the crossbar 10 in the grading groove 9, the eccentricity of the crossbar 10 relative to the center of the cam 8 can be adjusted, thereby directly changing the swing amplitude of the uniform plate 13 and realizing stepless adjustment of vibration intensity.

[0035] Below the uniform material plate 13, there is an airflow guiding structure 3, which is connected to the air separation chamber 201. An interception mechanism 2 is installed inside the air separation chamber 201. The airflow guiding structure 3 and the interception mechanism 2 constitute a highly efficient impurity removal system that integrates mechanical dispersion, airflow separation and physical interception.

[0036] Please refer to Figure 3 The airflow guiding structure 3 is mainly composed of an inlet 301, a sorting channel 302, and an air supply pipe 307. The sorting channel 302 is not a radial pipe. The inner wall of the sorting channel 302 is connected sequentially and integrally formed with a contraction section 303, a throat section 304, and an expansion section 305. The contraction section 303 gradually decreases in size to compress and accelerate the airflow. The throat section 304, as the narrowest part of the flow channel, is connected to the end of the contraction section 303 to make the airflow reach the highest stable flow velocity. The expansion section 305 is connected after the throat section 304. The bottom end of the inlet 301 is vertically connected to the upper wall of the sorting channel 302, and one end of the air supply pipe 307 is connected to the inlet end of the contraction section 303. The outer wall of the air supply pipe 307 is fixedly connected to the outer wall of the air separation chamber 201 by a bracket, ensuring stable airflow input.

[0037] Multiple vortex grooves 306 are correspondingly formed on the inner wall of the expansion section 305. The vortex grooves 306 are arc-shaped or spiral-shaped and recessed into the inner surface of the expansion section 305. When the high-speed airflow carrying the material rushes into the expansion section 305 from the throat section 304, it is guided by the groove wall of the vortex groove 306 to form a directional vortex airflow. This contraction acceleration combined with the flow channel of the expansion vortex ensures that the airflow entering the air separation chamber 201 has a complex flow field distribution, so that light tea leaves can quickly pass through with the central mainstream, while heavy impurities are effectively thrown to the peripheral wall under the dual action of inertia and vortex centrifugal force to achieve separation.

[0038] Please refer to Figure 3 and Figure 5 The interception mechanism 2 is disposed inside the air separation chamber 201. Specifically, the interception mechanism 2 includes a partition plate 202 fixedly connected to the inner wall of the air separation chamber 201. A support plate 203 is fixedly connected to the top of the partition plate 202. The support plate 203 is used to construct a stable support platform within the air separation chamber 201. An opening is made in the inner wall of the support plate 203, and a rotating shaft 204 is rotatably connected thereto. A connecting rod 205 is rotatably sleeved on the outer surface of the rotating shaft 204. The connecting rod 205 can freely rotate around the rotating shaft 204 in a vertical plane. Several elastic joints are rotatably connected at intervals on the outer surface of the connecting rod 205. The hook teeth 208 are elastic and extend obliquely along the airflow direction to catch flat impurities floating with the airflow. In order to achieve the automatic reset function, a connecting column 206 is fixedly connected to the inner side of the connecting rod 205. A tension spring 207 is fixedly connected between the connecting column 206 and the outer wall of the support plate 203. The tension of the spring 207 keeps the connecting rod 205 at a preset interception angle. When the weight of the accumulated impurities exceeds the threshold and causes the connecting rod 205 to flip and unload, the elastic restoring torque provided by the spring 207 pulls the connecting column 206 to quickly reset the connecting rod 205.

[0039] Please refer to Figure 7 and Figure 8 The connecting member 12 between the crossbar 10 and the uniform material plate 13 is a rigid connecting rod 205 structure. One end of the connecting member 12 is bolted to the end of the crossbar 10 located outside the grading tank 9, and the other end extends through the strip hole on the side wall of the feed inlet 301 to the inside and is fixedly connected to the side wall of the uniform material plate 13. This rigid connection ensures that the crossbar 10 transmits to the uniform material plate 13. At the same time, the manual bolt 11 is screwed into the threaded through hole opened in the inner wall of the crossbar 10, which can press against the tank wall of the grading tank 9 or lock the relative position of the crossbar 10 in the tank by the limiting block.

[0040] To optimize the stability of airflow during the sorting process, the side wall of the air separation chamber 201 is provided with multiple observation windows, which allows operators to observe the working status of the internal interception mechanism 2 and the separation of materials in real time. The air supply duct 307 is connected to an external high-pressure fan. The initial air speed entering the contraction section 303 can be precisely controlled by adjusting the fan speed through a frequency converter. Combined with the guiding effect of the vortex groove 306 on the inner wall of the expansion section 305, the sorting accuracy of matcha raw materials of different qualities is further improved.

[0041] Working Principle: In the matcha air-separation process, since the output end of motor 1 is fixedly connected to the drive shaft 4, starting motor 1 can directly drive the drive shaft 4 to rotate and achieve power output. Furthermore, since the outer surface of the drive shaft 4 is fixedly connected to the pulley set 5, and the inner wall of the pulley set 5 is fixedly connected to the drive shaft 6, and the outer surface of the drive shaft 6 is rotatably connected to the bracket 7, the rotation of the drive shaft 4 will drive the drive shaft 6 to rotate stably on the bracket 7 via the pulley set 5. Since the outer surface of the drive shaft 6 is fixedly connected to the cam 8, and the inner wall of the cam 8 has a grading groove 9, and the outer wall of the crossbar 10 is slidably connected to the grading groove 9, when the cam 8 rotates, it will drive the crossbar 10 to perform horizontal reciprocating motion via the grading groove 9. The crossbar 10 can be adjusted in the grading groove 9 via the manual bolt 11 on its inner wall. The crossbar 10 is positioned within the grading trough 9, and its outer surface is fixedly connected to the equalizing plate 13 via the connector 12. Therefore, the reciprocating motion of the crossbar 10 can synchronously drive the equalizing plate 13 to swing horizontally. The eccentric position can be changed by adjusting the different positions of the crossbar 10 in the grading trough 9 using the manual bolt 11, thereby achieving adjustable eccentricity and controlling the swing amplitude of the equalizing plate 13. Since multiple combing teeth 14 are fixedly connected to the inner wall of the equalizing plate 13, the combing teeth 14 will break up and comb the falling matcha raw materials when the equalizing plate 13 swings, thereby preventing the raw materials from clumping and accumulating, and forming a thin material layer of uniform thickness. This ensures that the airflow can act evenly on each tea particle in the subsequent air separation process, solving the problem of incomplete separation caused by uneven feeding in traditional methods, and ultimately improving the accuracy and efficiency of matcha air separation.

[0042] In the secondary separation stage of matcha air separation, the interception mechanism 2 is used to intercept yellow leaf impurities. Since a partition plate 202 is fixedly connected to the inner wall of the air separation chamber 201, and the top of the partition plate 202 is fixedly connected to the support plate 203, the support plate 203 can maintain stable support within the air separation chamber 201. Furthermore, a rotating shaft 204 is rotatably connected to the inner wall of the support plate 203, and the outer surface of the rotating shaft 204 is rotatably connected to the connecting rod 205. A connecting post 206 is fixedly connected to the inner wall of the connecting rod 205, and the connecting post 206 is fixed to the outer wall of the support plate 203 via a spring 207. Therefore, the connecting rod 205 can rotate around the rotating shaft 204, and after rotation, it can return to its original position due to the elastic force of the spring 207. The outer surface of the 5 is rotatably connected to an elastic hook tooth 208. When the flat yellow sheet passes through the air separation chamber 201 with the airflow, it will come into contact with the elastic hook tooth 208 and be intercepted. The wind force causes the flat yellow sheet to stick to the surface of the elastic hook tooth 208. When the yellow sheet is stuck in the gap of the hook tooth, its windward area will increase the airflow resistance, so that the yellow sheet is stably stuck and prevents it from falling off. When the yellow sheet accumulates to a certain weight, it will drive the connecting rod 205 to rotate around the rotating shaft 204 and stretch the spring 207, so that the elastic hook tooth 208 will fold and tilt, and the yellow sheet will automatically slide into the collection chamber. Then, through the interception and automatic reset of the elastic hook tooth 208, the yellow sheet is prevented from being mixed into the subsequent process, thereby improving the purity and quality of the finished matcha.

[0043] In the secondary separation of matcha air classifier, the airflow guiding structure 3 provides an airflow trajectory for material sorting. Since the inner wall of the inlet 301 is connected to the sorting channel 302, and the inner wall of the sorting channel 302 is sequentially provided with a contraction section 303, a throat section 304 and an expansion section 305 and connected to each other, and the air supply pipe 307 is connected to the contraction section 303 and its outer wall is fixed to the outer wall of the air classifier 201, the airflow sent by the air supply pipe 307 is accelerated by the contraction section 303, stabilized in the throat section 304, and decelerated from the expansion section 305. Together with the vortex groove 306 on the inner wall of the expansion section 305, a directional vortex airflow is formed, so that the light tea leaves move forward with the central airflow, and the heavy impurities are thrown to the groove wall, achieving separation and greatly improving the air classifier efficiency and impurity removal rate.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their likenesses.

Claims

1. An air separator for matcha processing, comprising: The motor (1), transmission shaft (4), pulley assembly (5), drive shaft (6), and bracket (7) are characterized in that the output end of the motor (1) is fixedly connected to one end of the transmission shaft (4) via a coupling, the outer surface of the transmission shaft (4) is fixedly connected to the driving end of the pulley assembly (5), the inner wall of the driven end of the pulley assembly (5) is fixedly connected to the drive shaft (6), the outer surface of the drive shaft (6) is rotatably connected to the bracket (7), and the bracket (7) is used to provide support; It also includes a feeding and equalization component, an airflow guiding structure (3), and an air separation chamber (201) with an interception mechanism (2). A cam (8) is fixedly connected to the outer surface of the drive shaft (6). A grading groove (9) with a closed trajectory is opened on the inner wall of the cam (8). A crossbar (10) is slidably connected inside the grading groove (9). A equalization plate (13) is fixedly connected to the outer surface of the end of the crossbar (10) through a connector (12). The equalization plate (13) is located above the feeding of the airflow guiding structure (3). A plurality of combing teeth (14) are fixedly connected to the inner wall of the equalization plate (13). When the motor (1) drives the cam (8) to rotate, the cam (8) drives the crossbar (10) to perform horizontal reciprocating motion through the grading groove (9), thereby driving the material equalization plate (13) and the combing teeth (14) to break up the raw materials. The high-frequency reciprocating oscillation of the material equalization plate (13) in conjunction with the combing teeth (14) is used to initially break up and comb the clumps of matcha raw materials conveyed by the conveyor belt. The output end of the airflow guiding structure (3) is connected to the air selection chamber (201), and the interception mechanism (2) is located in the internal airflow channel of the air selection chamber (201). The inner wall of the crossbar (10) is provided with a threaded hole, and a manual bolt (11) is threadedly connected to the threaded hole. The end of the manual bolt (11) abuts against the fit gap between the crossbar (10) and the grading groove (9). By rotating the manual bolt (11), the relative fixed position of the crossbar (10) in the grading groove (9) is adjusted, thereby adjusting the eccentricity of the reciprocating motion of the uniform plate (13). The airflow guiding structure (3) includes a feed inlet (301), a sorting channel (302), and an air supply pipe (307); the feed inlet (301) is vertically arranged, and the connector (12) passes through the side wall of the feed inlet (301) and is fixedly connected to the material equalization plate (13) located inside it; the bottom end of the feed inlet (301) is connected to the upper wall of the sorting channel (302); The sorting channel (302) has a Venturi tube structure. The inner wall of the sorting channel (302) is connected in sequence with a contraction section (303), a throat section (304) and an expansion section (305) along the airflow direction. One end of the air supply pipe (307) is connected to the inlet end of the contraction section (303), and the outer wall of the air supply pipe (307) is fixedly connected to the outer wall of the air separation chamber (201). The inner wall of the expansion section (305) is provided with a plurality of vortex grooves (306), which are arc-shaped depressions and are used to form directional vortex airflow in the airflow diffusion zone of the expansion section (305) to assist in material separation.

2. The air separator for matcha processing according to claim 1, characterized in that, The interception mechanism (2) includes a partition plate (202) and a support plate (203); the partition plate (202) is vertically fixed to the inner wall of the air separation chamber (201), the top of the partition plate (202) is fixedly connected to the bottom of the support plate (203), and the support plate (203) extends horizontally within the air separation chamber (201).

3. The air separator for matcha processing according to claim 2, characterized in that, The interception mechanism (2) also includes a rotating shaft (204) and a connecting rod (205); the inner wall of the support plate (203) is provided with a mounting hole, the rotating shaft (204) is rotatably connected in the mounting hole, and one end of the connecting rod (205) is rotatably sleeved on the outer surface of the rotating shaft (204), so that the connecting rod (205) can rotate around the rotating shaft (204) in a vertical plane.

4. The air separator for matcha processing according to claim 3, characterized in that, The outer surface of the connecting rod (205) is rotatably connected with a plurality of elastic hook teeth (208) along the length direction. The elastic hook teeth (208) are inclined in the direction away from the airflow direction, and the end of the elastic hook teeth (208) is provided with a barb structure for hooking flat impurities.

5. The air separator for matcha processing according to claim 4, characterized in that, A connecting column (206) is fixedly connected to the inner side of the connecting rod (205). A spring (207) is fixedly connected between the connecting column (206) and the outer wall of the support plate (203). The spring (207) is in a stretched state to provide the elastic tension required for the connecting rod (205) to reset. The air separation chamber (201) is a rectangular box structure. An observation window is provided on the side wall of the air separation chamber (201). The end of the expansion section (305) of the sorting channel (302) is horizontally connected to the side wall opening of the air separation chamber (201).

6. The air separator for matcha processing according to claim 1, characterized in that, The pulley assembly (5) includes a drive pulley, a driven pulley and a transmission belt. The drive pulley is fixedly sleeved on the transmission shaft (4), the driven pulley is fixedly sleeved on the drive shaft (6), and the transmission belt is tensioned between the drive pulley and the driven pulley.

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