Efficient fixation machine and method for bud type green tea

Abstract

The invention discloses an efficient fixation machine and method for bud-type green tea, and relates to the technical field of tea fixation machines.According to the efficient fixation machine and method for the bud-type green tea, through a pre-fixation assembly and a main fixation assembly which are sequentially arranged, the combined fixation technology of'steam fixation + roller fixation 'of the bud-type green tea is achieved; mechanical damage caused by traditional hot air or stir-frying is avoided, steam penetrating power is high, heat distribution is uniform, initial inhibition of enzyme activity can be completed within a short time, meanwhile, bud leaf cell integrity is kept, and the bud head breakage rate can be reduced to 3% or below. The roller main fixation adopts low rotation speed to cooperate with hot air turning, so that fixation uniformity is guaranteed, friction and collision between buds and leaves are reduced, and the problems of edge scorching and breaking caused by high temperature and high speed of a traditional roller are solved. And the adopted damp-heat separation device can effectively recycle heat, so that the energy consumption cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of tea fixation machine technology, specifically to a high-efficiency fixation machine and method for bud-type green tea. Background Technology

[0002] As a high-end category of green tea, bud-type green tea is highly favored by the market for its tender buds and leaves, rich aroma, and abundant internal substances. Its quality is closely related to the fixation process. Fixation, a crucial step in tea processing, requires high temperatures to deactivate enzymes in fresh leaves, inhibit the oxidation of tea polyphenols, and evaporate some moisture, making the buds and leaves softer for subsequent processing. However, the fixation process for bud-type green tea still faces many technical bottlenecks, and traditional equipment is insufficient to meet its unique processing requirements. Drum-type withering machines are currently widely used, but their core working component is a metal drum. The drum's rotation causes the buds and leaves to tumble, thus achieving withering. Because the inner wall of the drum is made of a rigid material, intense friction and collision occur between the buds and leaves and the drum wall, as well as between the buds and leaves themselves. This easily leads to scorching at the edges of the buds and leaves, severely affecting the uniformity of the tea's appearance.

[0003] While pan-fired tea processing machines offer a degree of flexibility through manual stirring, they have significant limitations. They rely on operator experience to control the stirring frequency and heat, with a single pan processing capacity of only 3-5 kg, resulting in low production efficiency and making them unsuitable for large-scale production. More importantly, manual operation easily leads to poor batch stability; the moisture content of the same batch of tea can vary by 3%-5%, and the prolonged high-temperature environment causes extreme physical strain on operators, posing a risk of burns. In recent years, some improved withering equipment has attempted to improve processing results by reducing rotation speed or using elastic liners, but the core problem has not been completely solved. While reducing rotation speed can reduce friction, it can lead to uneven heating of buds and leaves, extending withering time by more than 30%, which in turn increases the probability of browning of buds and leaves. Elastic liners are prone to aging under high temperature environments, with a service life of less than 50 batches, and are difficult to clean, making them prone to microbial contamination of tea.

[0004] The unique structure of buds and tender leaves in bud-type green tea makes it difficult to meet the technical requirements of traditional equipment, which involves rigid contact, vigorous turning, and temperature fluctuations. This results in inconsistent processing quality for premium bud-type green tea. Therefore, developing a highly efficient fixation machine capable of gentle stir-frying is crucial to overcoming current technological bottlenecks. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a high-efficiency fixation machine and method for bud-type green tea. It employs a combined process of "steam fixation + drum fixation," utilizing steam to rapidly deactivate enzymes, preserve freshness and chlorophyll, and then using drum fixation to adjust moisture, enhance aroma, and fix bud shape; thus achieving "low-temperature, short-time" fixation for bud-type green tea.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A high-efficiency fixation machine for bud-type green tea is provided, including a frame, on which a feeding component, a pre-fixation component, a main fixation component and a discharging component are connected in sequence. The pre-blanching assembly includes a vertically arranged steam pre-blanching cylinder with an annular steam outlet at the bottom, which is inclined upwards. The steam outlet is connected to a steam generator. The top side of the steam pre-blanching cylinder has a feed inlet connected to a feeding assembly, and the top of the steam pre-blanching cylinder also has a steam overflow outlet. A suction fan is also installed at the steam overflow outlet, and the air inlet of the suction fan is connected to the steam overflow outlet. The main blanching component is a cylindrical blanching unit, with the bottom end of the steam pre-blanching cylinder connected to the feed end of the cylindrical blanching unit; The discharge assembly includes a discharge hopper located at the discharge end of the cylindrical blanching machine, with the end of the discharge hopper away from the cylindrical blanching machine tilted downwards; a cooling fan is installed on the bottom surface of the discharge hopper, and the bottom surface of the discharge hopper at the cooling fan has a mesh structure.

[0007] Furthermore, the tubular blanching device includes a blanching cylinder, which includes an inner cylinder and an outer cylinder. A uniform gap is provided between the inner cylinder and the outer cylinder. The inner cylinder is a mesh cylinder. Both ends of the inner cylinder are rotatably engaged with the outer cylinder through a rotating shaft. One end of the inner cylinder extends out of the outer cylinder, and the end of the inner cylinder extending out of the outer cylinder is driven and connected to an inner cylinder drive motor. The bottom surface of the outer cylinder is evenly spaced with several air holes along its length. Several air holes are connected to an air heating component. The air heating component blows heated dry air from bottom to top into the inner cylinder through the air holes, and then blows it into the inner cylinder through the mesh of the inner cylinder. The inner cylinder is equipped with a spiral guide vane.

[0008] Furthermore, a blower is provided at each of the several air holes. The blower is located in the gap between the inner and outer cylinders, and the length of the blower is less than the gap.

[0009] Furthermore, the exhaust fan is connected to a moisture and heat separation device, and the exhaust end of the moisture and heat separation device is connected to the air inlet of the air heating component.

[0010] Furthermore, an annular air vent is provided between the steam pre-blanching cylinder and the cylindrical blanching machine, and an arc-shaped air vent is provided at the discharge end of the cylindrical blanching machine. The air outlet of the moisture-heat separation device is connected to the annular air vent and the arc-shaped air vent respectively, with the annular air vent inclined toward the steam pre-blanching cylinder and the arc-shaped air vent inclined toward the cylindrical blanching machine; a pressurizing fan is also provided at the air outlet of the moisture-heat separation device.

[0011] The arc-shaped air vent creates an air wall at the discharge end of the cylindrical blanching machine, preventing rapid heat loss and enabling segmented temperature control within the inner cylinder.

[0012] Furthermore, the feeding assembly includes a conveyor belt, with a feeding hopper at one end of the conveyor belt near the steam pre-cleaning cylinder. The smaller end of the feeding hopper is connected to the feeding port of the steam pre-cleaning cylinder, and a periodic impact assembly is provided below the smaller end of the feeding hopper. The periodic impact assembly includes an impact plate, with the upper part of the impact plate rotatably connected to the feeding hopper. A first connecting rod is hinged to the side of the impact plate away from the steam pre-cleaning cylinder. A rotating wheel is provided at the end of the first connecting rod away from the impact plate, and the first connecting rod is eccentrically hinged to the rotating wheel. The rotating wheel is connected to the idler roller of the conveyor belt through a coupling. When the conveyor belt is working, the idler roller rotates, driving the rotating wheel to rotate.

[0013] Furthermore, a dust suction port is provided on the top surface of the discharge hopper, and a vacuum cleaner is connected to the dust suction port through a pipe.

[0014] This invention also provides a method for fixing bud-type green tea using the above-mentioned high-efficiency fixing machine for bud-type green tea, comprising the following technical steps: S1: The picked and washed bud green tea is conveyed to the feeding hopper by the conveyor belt. Under the action of gravity, the tea leaves slide down and leave the feeding hopper. The operation of the conveyor belt causes the idler roller to rotate, which drives the rotating wheel to move, causing the first connecting rod to make periodic movements, thereby driving the impact plate to make periodic throwing actions. The tea leaves are thrown by the impact plate the moment they leave the feeding hopper, causing the tea leaves to disperse and fall in the steam pre-fixing cylinder. S2: The steam generator produces steam, which is sprayed upward from the annular steam outlet to perform high-temperature steam fixation on the falling tea leaves; at the same time, the suction fan at the top of the steam pre-fixation cylinder works to extract the upward-moving steam and circulate it through the heat-dampening separation device, while creating a low pressure at the steam overflow outlet to move the steam towards the steam overflow outlet and prevent the steam from being sprayed out from the feed inlet. S3: After being steamed at high temperature, the tea leaves pass through the annular air vent. The dry hot air from the annular air vent carries away the excess moisture from the surface of the tea leaves. The leaves then fall into the inner cylinder from the feed end of the cylindrical fixer. The inner cylinder rotates under the action of the inner cylinder drive motor. The air heating component blows dry hot air into the inner cylinder to fix the tea leaves inside. The tea leaves move towards the discharge end of the cylindrical fixer under the action of the spiral guide plate. During the movement, the spiral guide vane turns the tea leaves over, and the air from the blower turns the tea leaves piled up at the bottom of the inner cylinder. S4: After the tea leaves are fixed by the cylindrical fixing machine, they fall from the discharge hopper. As the tea leaves pass through the discharge hopper, they are blown upwards by the cooling fan, which blows away the residual dust in the tea leaves and towards the dust suction port, and lowers the temperature of the tea leaves, thus completing the fixing process.

[0015] Furthermore, the steam volume of the steam generator and the air volume of the annular vent are controlled and adjusted so that the falling tea leaves in the steam pre-fixing cylinder take 10-20 seconds to fall.

[0016] Furthermore, the tea leaves are kept in the cylindrical fixation device for 1 to 3 minutes; the temperature of the cylinder wall is controlled at 120-160℃.

[0017] The beneficial effects of this invention are as follows: This invention achieves a combined "steam fixation + drum fixation" process for bud-type green tea by sequentially setting up a pre-fixation component and a main fixation component. The steam pre-fixation uses low-temperature saturated steam for gentle heating, avoiding the mechanical damage caused by traditional hot air or frying. The steam has strong penetrating power and uniform heat distribution, enabling preliminary inhibition of enzyme activity in a short time while maintaining the integrity of bud and leaf cells, reducing the bud breakage rate to below 3%. The drum main fixation uses low speed combined with hot air tumbling, ensuring uniform fixation and reducing friction and collision between buds and leaves, solving the problems of scorching and breakage caused by the high temperature and high speed of traditional drum fixation.

[0018] The wet heat separation device used can effectively recycle heat and reduce energy costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 A schematic diagram of a partial three-dimensional structure at the periodic impact component; Figure 4 A cross-sectional schematic diagram of a cylindrical blanching device; Figure 5 for Figure 4 Enlarged view of point A in the middle; Among them, 201, conveyor belt; 202, hopper; 203, impact plate; 204, first connecting rod; 205, rotary wheel; 301, steam pre-blanching cylinder; 302, annular steam outlet; 303, steam generator; 304, feed inlet; 305, steam overflow outlet; 306, suction fan; 307, wet and hot separation device; 401, inner cylinder; 402, outer cylinder; 403, rotating shaft; 404, inner cylinder drive motor; 405, air hole; 406, air heating component; 407, blower; 501, discharge hopper; 502, cooling fan; 503, dust suction port; 504, vacuum cleaner; 6, annular air outlet; 7, arc-shaped air outlet. Detailed Implementation

[0020] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0021] like Figures 1-5 As shown, a high-efficiency fixation machine for bud-type green tea includes a frame, on which a feeding component, a pre-fixation component, a main fixation component, and a discharge component are connected in sequence. The pre-blanching assembly includes a vertically arranged steam pre-blanching cylinder 301. The bottom of the steam pre-blanching cylinder 301 is provided with an annular steam outlet 302, which is inclined upwards. The steam outlet is connected to a steam generator 303. The top side of the steam pre-blanching cylinder 301 is provided with a feed inlet 304 connected to a feeding assembly. The top of the steam pre-blanching cylinder 301 is also provided with a steam overflow outlet 305. A suction fan 306 is also provided at the steam overflow outlet 305, and the air inlet of the suction fan 306 is connected to the steam overflow outlet 305. The main blanching component is a cylindrical blanching unit, and the bottom end of the steam pre-blanching cylinder 301 is connected to the feed end of the cylindrical blanching unit; The discharge assembly includes a discharge hopper 501 located at the discharge end of the cylindrical blanching machine. The end of the discharge hopper 501 away from the cylindrical blanching machine is inclined downward. A cooling fan 502 is provided on the bottom surface of the discharge hopper 501, and the bottom surface of the discharge hopper 501 at the cooling fan 502 has a mesh structure.

[0022] In practical implementation, a PLC controller can also be set up to realize the electrical control of various electrical components in the process, the controller power and switching, and flow sensors, temperature sensors, and humidity sensors can be set up to automatically adjust steam parameters, drum speed, heating temperature, and air volume according to the sensor feedback signals to achieve closed-loop control.

[0023] The steam generator is connected to a PLC controller, and the steam output can be adjusted from 0.2 to 0.6 m³ / h. 3 / min.

[0024] In practice, the mesh diameter of the mesh structure is smaller than that of tea leaves, and to prevent wind from being unable to pass through the smaller mesh diameter, the cooling fan 502 is equipped with a baffle.

[0025] The cylindrical blanching device includes a blanching cylinder, which includes an inner cylinder 401 and an outer cylinder 402. A uniform gap is provided between the inner cylinder 401 and the outer cylinder 402. The inner cylinder 401 is a mesh cylinder. Both ends of the inner cylinder 401 are rotatably engaged with the outer cylinder 402 through a rotating shaft 403. One end of the inner cylinder 401 extends out of the outer cylinder 402. The end of the inner cylinder 401 extending out of the outer cylinder 402 is driven and connected to an inner cylinder drive motor 404. The inner cylinder drive motor 404 is driven by the inner cylinder 401 through gears, and can also be driven by a belt.

[0026] The bottom surface of the outer cylinder 402 is provided with a number of air holes 405 evenly spaced along the length direction. The air holes 405 are connected to an air heating component 406. The air heating component 406 blows heated dry air from bottom to top through the air holes 405 to the inner cylinder 401, and blows it into the inner cylinder 401 through the mesh of the inner cylinder 401. A spiral guide vane is installed inside the inner cylinder 401.

[0027] In practice, a silicone layer is provided on the inner wall of the inner cylinder 401 and the surface of the spiral guide plate to reduce the rigid impact of the tea leaves.

[0028] A blower 407 is provided at each of the several air holes 405. The blower 407 is located in the gap between the inner cylinder 401 and the outer cylinder 402, and the length of the blower 407 is less than the gap.

[0029] The blower 407, being close to the inner cylinder 401, allows the blown hot air to work in conjunction with the spiral guide vanes to stir-fry the tea leaves, reducing the probability of the tea leaves sticking together due to surface moisture.

[0030] In practice, the inner diameter of the blower 407 gradually increases along the length of the cylindrical fixer. The inner diameter of the blower 407 near the feed end of the cylindrical fixer is smaller. The smaller inner diameter can increase the wind speed. The tea leaves at the feed end have more moisture and are heavier. The increased wind speed can more effectively blow the tea leaves up, preventing them from sticking together and the moisture from failing to separate. In addition, the higher wind speed can reduce the outlet temperature, thus achieving a lower temperature of about 120-150℃ in the front section and a higher temperature of 120-160℃ in the rear section of the cylindrical fixer, which is more in line with the fixation process standards.

[0031] The exhaust fan 306 is also connected to a moisture and heat separation device 307, and the exhaust end of the moisture and heat separation device 307 is connected to the air inlet end of the air heating component 406.

[0032] An annular vent 6 is provided between the steam pre-fixing cylinder 301 and the cylindrical fixer. An arc-shaped vent 7 is provided at the discharge end of the cylindrical fixer. The air outlet of the moisture-heat separation device 307 is connected to the annular vent 6 and the arc-shaped vent 7 respectively. The annular vent 6 is inclined towards the steam pre-fixing cylinder 301, and the arc-shaped vent 7 is inclined towards the cylindrical fixer. A pressurizing fan is also provided at the air outlet of the moisture-heat separation device 307. In specific implementation, flow control valves are provided between the pressurizing fan and the annular vent 6, the arc-shaped vent 7, and the air heating component 406 to regulate the air volume of each air outlet.

[0033] The arc-shaped air vent 7 creates an air wall at the discharge end of the cylindrical blanching machine, preventing rapid heat loss. In practice, an electric heating rod can be installed between the air outlet of the wet heat separation device 307 and the arc-shaped air vent 7 to achieve precise segmented temperature control of the inner cylinder 401.

[0034] The feeding assembly includes a conveyor belt 201. A feeding hopper 202 is located at one end of the conveyor belt 201 near the steam pre-cleaning cylinder 301. The smaller end of the feeding hopper 202 is connected to the feeding port of the steam pre-cleaning cylinder 301. A periodic impact assembly is located below the smaller end of the feeding hopper 202. The periodic impact assembly includes an impact plate 203. The upper part of the impact plate 203 is rotatably connected to the feeding hopper 202. A first connecting rod 204 is hinged to the side of the impact plate 203 away from the steam pre-cleaning cylinder 301. A first connecting rod 204 is slidably provided with a limiting groove. The first connecting rod 204 moves along the length direction of the limiting groove. A driving groove is vertically provided on the first connecting rod 204. A slider is slidably fitted in the driving groove. A second connecting rod is hinged to the slider. A rotating wheel 205 is provided at the end of the second connecting rod away from the slider. The second connecting rod and the rotating wheel 205 are eccentrically hinged. The rotating wheel 205 is connected to the idler roller of the conveyor belt 201 through a coupling. When the conveyor belt 201 is working, the idler roller rotates, driving the rotating wheel 205 to rotate.

[0035] The top surface of the discharge hopper 501 is provided with a dust suction port 503, and the dust suction port 503 is connected to a vacuum cleaner 504 through a pipe.

[0036] This invention also provides a method for fixing bud-type green tea using the above-mentioned high-efficiency fixing machine for bud-type green tea, comprising the following technical steps: S1: The bud-type green tea is conveyed from the conveyor belt 201 to the feeding hopper 202. Under the action of gravity, the tea leaves slide down and leave the feeding hopper 202. Because the operation of the conveyor belt 201 causes the idler roller to rotate, the idler roller drives the rotating wheel 205 to move, causing the first connecting rod 204 to make periodic movements, thereby driving the throwing plate 203 to make periodic throwing movements. At the moment the tea leaves leave the feeding hopper 202, they are thrown by the throwing plate 203, causing the tea leaves to disperse and fall in the steam pre-fixing cylinder 301. S2: The steam generator 303 produces steam, which is ejected upward from the annular steam outlet 302 to perform high-temperature steam fixation on the falling tea leaves; at the same time, the suction fan 306 at the top of the steam pre-fixation cylinder 301 works to extract the upward-moving steam and circulate it through the heat and moisture separation device 307, while creating a low pressure at the steam overflow outlet 305, causing the steam to move towards the steam overflow outlet 305 and preventing the steam from being ejected from the feed inlet 304. S3: After being steamed at high temperature, the tea leaves pass through the annular air vent 6. The dry hot air from the annular air vent 6 carries away the excess moisture on the surface of the tea leaves. The leaves then fall into the inner cylinder 401 from the feed end of the cylindrical fixer. The inner cylinder 401 rotates under the action of the inner cylinder drive motor 404. The air heating component 406 blows dry hot air into the inner cylinder 401 to fix the tea leaves in the inner cylinder 401. The tea leaves move towards the discharge end of the cylindrical fixer under the action of the spiral guide plate. During the movement, on the one hand, the spiral guide vane plate turns the tea leaves over, and on the other hand, the air from the blower 407 turns the tea leaves piled up at the bottom of the inner cylinder 401. S4: After the tea leaves are fixed by the cylindrical fixing machine, they fall from the discharge hopper 501. When the tea leaves pass through the discharge hopper 501, they are blown upwards by the cooling fan 502 to disperse the residual dust of the tea leaves and blow it towards the dust suction port 503, thereby reducing the temperature of the tea leaves and completing the fixing process.

[0037] The amount of steam generated by the steam generator 303 and the amount of air discharged from the annular vent 6 are controlled and adjusted so that the falling tea leaves in the steam pre-fixing cylinder 301 fall for 10 to 20 seconds.

[0038] The tea leaves are placed in the cylindrical fixation device for 1 to 3 minutes; the temperature of the cylinder wall is controlled at 120 to 150℃.

Claims

1. A high-efficiency fixation machine for bud-type green tea, characterized in that, The machine includes a frame, on which a feeding assembly, a pre-blanching assembly, a main blanching assembly, and a discharge assembly are sequentially connected; The pre-blanching assembly includes a vertically arranged steam pre-blanching cylinder with an annular steam outlet at the bottom, the steam outlet being inclined upwards; the steam outlet is connected to a steam generator; the top side of the steam pre-blanching cylinder has a feed inlet connected to a feeding assembly, and the top of the steam pre-blanching cylinder also has a steam overflow outlet; a suction fan is also provided at the steam overflow outlet, and the air inlet of the suction fan is connected to the steam overflow outlet; The main blanching component is a cylindrical blanching device, and the bottom end of the steam pre-blanching cylinder is connected to the feed end of the cylindrical blanching device; The discharge assembly includes a discharge hopper located at the discharge end of the cylindrical blanching machine, with the end of the discharge hopper away from the cylindrical blanching machine tilted downwards; a cooling fan is provided on the bottom surface of the discharge hopper, and the bottom surface of the discharge hopper at the cooling fan has a mesh structure.

2. The high-efficiency green tea fixation machine for bud-type tea according to claim 1, characterized in that, The tubular blanching device includes a blanching cylinder, which includes an inner cylinder and an outer cylinder. A uniform gap is provided between the inner cylinder and the outer cylinder. The inner cylinder is a mesh cylinder. Both ends of the inner cylinder are rotatably connected to the outer cylinder through a rotating shaft. One end of the inner cylinder extends out of the outer cylinder, and the end of the inner cylinder extending out of the outer cylinder is driven and connected to an inner cylinder drive motor. The bottom surface of the outer cylinder is provided with a number of air holes evenly spaced along the length direction. The air holes are connected to an air heating component at the same time. The air heating component blows heated dry air from bottom to top into the inner cylinder through the air holes, and then blows it into the inner cylinder through the mesh of the inner cylinder. The inner cylinder is equipped with a spiral guide vane.

3. The high-efficiency fixation machine for bud-type green tea according to claim 2, characterized in that, A blower is provided at each of the several air holes. The blower is located in the gap between the inner cylinder and the outer cylinder, and the length of the blower is less than the gap.

4. The high-efficiency green tea fixation machine for bud-type tea according to claim 3, characterized in that, The exhaust fan is also connected to a moisture and heat separation device, the exhaust end of which is connected to the air inlet of the air heating component.

5. The high-efficiency fixation machine for bud-type green tea according to claim 4, characterized in that, An annular vent is provided between the steam pre-blanching cylinder and the cylindrical blanching machine. An arc-shaped vent is provided at the discharge end of the cylindrical blanching machine. The air outlet of the moisture-heat separation device is connected to the annular vent and the arc-shaped vent respectively. The annular vent is inclined toward the steam pre-blanching cylinder, and the arc-shaped vent is inclined toward the cylindrical blanching machine. A pressurizing fan is also provided at the air outlet of the moisture-heat separation device.

6. The high-efficiency green tea fixation machine for bud-type tea according to claim 5, characterized in that, The feeding assembly includes a conveyor belt, with a feeding hopper at one end of the conveyor belt near the steam pre-blanching cylinder. The smaller end of the feeding hopper is connected to the feeding port of the steam pre-blanching cylinder, and a periodic impact assembly is located below the smaller end of the feeding hopper. The periodic impact assembly includes an impact plate, the upper part of which is rotatably connected to the feeding hopper. A first connecting rod is hinged to the side of the impact plate away from the steam pre-blanching cylinder. A rotating wheel is located at the end of the first connecting rod away from the impact plate, and the first connecting rod is eccentrically hinged to the rotating wheel. The rotating wheel is connected to the idler roller of the conveyor belt through a coupling. When the conveyor belt is working, the idler roller rotates, driving the rotating wheel to rotate.

7. The high-efficiency green tea fixation machine for bud-type tea according to claim 6, characterized in that, The top surface of the discharge hopper is provided with a dust suction port, which is connected to a vacuum cleaner via a pipe.

8. A method for fixing bud-type green tea using the high-efficiency fixing machine for bud-type green tea as described in claim 7, characterized in that, The technical steps include the following: S1: The picked and washed bud green tea is conveyed to the feeding hopper by the conveyor belt. Under the action of gravity, the tea leaves slide down and leave the feeding hopper. The operation of the conveyor belt causes the idler roller to rotate, which drives the rotating wheel to move, causing the first connecting rod to make periodic movements, thereby driving the impact plate to make periodic throwing actions. The tea leaves are thrown by the impact plate the moment they leave the feeding hopper, causing the tea leaves to disperse and fall in the steam pre-fixing cylinder. S2: The steam generator produces steam, which is sprayed upward from the annular steam outlet to perform high-temperature steam fixation on the falling tea leaves; at the same time, the suction fan at the top of the steam pre-fixation cylinder works to extract the upward-moving steam and circulate it through the heat-dampening separation device, while creating a low pressure at the steam overflow outlet to move the steam towards the steam overflow outlet and prevent the steam from being sprayed out from the feed inlet. S3: After being steamed at high temperature, the tea leaves pass through the annular air vent. The dry hot air from the annular air vent carries away the excess moisture from the surface of the tea leaves. The leaves then fall into the inner cylinder from the feed end of the cylindrical fixer. The inner cylinder rotates under the action of the inner cylinder drive motor. The air heating component blows dry hot air into the inner cylinder to fix the tea leaves inside. The tea leaves move towards the discharge end of the cylindrical fixer under the action of the spiral guide plate. During the movement, the spiral guide vane turns the tea leaves over, and the air from the blower turns the tea leaves piled up at the bottom of the inner cylinder. S4: After the tea leaves are fixed by the cylindrical fixing machine, they fall from the discharge hopper. As the tea leaves pass through the discharge hopper, they are blown upwards by the cooling fan, which blows away the residual dust in the tea leaves and towards the dust suction port, and lowers the temperature of the tea leaves, thus completing the fixing process.

9. The method for fixing bud-type green tea according to claim 8, characterized in that, Control the steam output of the steam generator and the air output of the annular vent to ensure that the falling tea leaves in the steam pre-fixing cylinder take 10-20 seconds to fall.

10. The method for fixing bud-type green tea according to claim 9, characterized in that, The tea leaves are placed in the cylindrical fixation device for 1 to 3 minutes; the temperature of the cylinder wall is controlled at 120-160℃.

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