Tea leaf drying machine and tea leaf drying method

Abstract

The application discloses a tea drying machine and a tea drying method, which comprise a drying cylinder and a top cover sleeved on the top of the drying cylinder. A plurality of support frames are fixed to the bottom plate of the drying cylinder. Two servo motors and an air inlet cylinder are fixed to the top and the side of the support frame, respectively. An axial flow fan is fixed to the inner wall of the air inlet cylinder through a support rod. A sealing bearing is arranged on the top of the air inlet cylinder. A connecting cylinder is arranged on the periphery of the sealing bearing. A top cylinder is arranged in the middle of the other sealing bearing. The plurality of sealing bearings, the plurality of connecting cylinders and the plurality of air outlet cylinders are mutually overlapped and spaced. The first conveying pipe and the second conveying pipe in the application stir the tea leaves, so that the tea leaves are rapidly blown up by the hot air in the drying ring gap. Meanwhile, the hot air flows in the first conveying pipe, the second conveying pipe and the drying ring. The tea leaves can be uniformly contacted with the hot air, and the tea leaves can be stirred and heated, so that the tea leaves are uniformly heated on the plurality of drying rings. The application has the advantages that the tea leaves are uniformly dried.

Description

Technical Field

[0001] This invention relates to the field of tea production technology, and in particular to a tea drying machine and a tea drying method. Background Technology

[0002] After tea leaves are picked, they need to go through frying, drying, inspection and packaging. During the drying process, a tea drying machine is used to generate hot air to dry the tea leaves, reduce their moisture content and increase their storage time.

[0003] In existing tea drying machines and methods, the tea leaves remain stationary in a basket, and hot air is blown onto the leaves by the drying machine. Because the leaves are stationary, there is a temperature difference between the inside and outside of the tea pile, resulting in uneven drying and varying moisture content, which affects the quality of the tea. The current technology disclosed in CN201610243358.6, a tea drying machine and method, clearly has the above-mentioned defects. Therefore, there is a need to provide a tea drying machine and method. Summary of the Invention

[0004] The purpose of this invention is to solve the problem in the prior art where tea leaves are stationary in a basket, and hot air is blown onto the tea leaves by a dryer. Because the tea leaves are stationary, there is a temperature difference between the inside and outside of the tea pile, resulting in uneven drying and inconsistent moisture content, which affects the quality of the tea. Therefore, this invention proposes a tea dryer and a tea drying method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tea drying machine, comprising a drying cylinder and a top cover fitted on its top, multiple support frames fixed to the bottom plate of the drying cylinder, two servo motors and an air inlet duct fixed to the top and sides of the support frames respectively, an axial flow fan fixed to the inner wall of the air inlet duct by a support rod, a sealed bearing nested at the top of the air inlet duct, a connecting cylinder nested around the sealed bearing, a top cylinder nested in the middle of another sealed bearing, multiple sealed bearings, multiple connecting cylinders and multiple exhaust ducts stacked and spaced apart, a first conveying pipe or a second conveying pipe embedded on both sides of the multiple exhaust ducts, a sealing ring fixed at the bottom of the first conveying pipe and the second conveying pipe, a drying ring fixed on the sealing ring, a first spur gear or a second spur gear fixed at the bottom of the drying ring, and a pressing device provided at the top of the multiple sealing rings; a center plate fitted around the top of the air inlet duct, a second rotating shaft and a first rotating shaft fixed to the power output ends of the two servo motors respectively, and multiple drive gears fixed on both the second rotating shaft and the first rotating shaft.

[0006] More preferably, the drying ring is hollow inside and its top opening is blocked by a sealing ring, and the diameters of the multiple drying rings decrease sequentially and are sleeved around the periphery of the central plate, with the drying ring, sealing ring and the top of the central plate at the same height.

[0007] More preferably, the drying rings have air vents on their inner and outer sides, and there are gaps between the multiple drying rings without them contacting each other, with the air vents being inclined.

[0008] More preferably, the first sprocket and the second sprocket are sequentially spaced with decreasing diameters, and the first sprocket is engaged with the driving gear on the first rotating shaft.

[0009] More preferably, the second spur gear meshes with the driving gear on the second rotating shaft, and the second rotating shaft and the first rotating shaft rotate in opposite directions.

[0010] More preferably, the exhaust duct has connection holes on both sides, and the two ends of the exhaust duct are respectively fitted with two connecting cylinders, with multiple connecting cylinders spaced equidistantly above the center plate.

[0011] More preferably, the sealed bearings are sleeved on both ends of the connecting cylinder, and one end of the first conveying pipe and the second conveying pipe is located in the gap between the two sealed bearings.

[0012] More preferably, the edge of the drying ring is set to be inclined, and the other ends of the first conveying pipe and the second conveying pipe pass through the sealing ring, and both the first conveying pipe and the second conveying pipe are provided with a 90-degree bend.

[0013] More preferably, an air filter screen is fixed to the bottom plate of the inner wall of the air inlet duct, and a heating tube is embedded in the side of the air inlet duct. The heating tube heats the air to form a hot airflow inside the air inlet duct.

[0014] More preferably, the extrusion device includes a sliding column, a dynamic pressure plate, a fixed column, and a constant pressure plate. The top of the plurality of sealing rings is fixed with a plurality of sliding columns and a plurality of fixed columns. The dynamic pressure plate is movably sleeved on the sliding column, and the constant pressure plate is fixedly sleeved on the fixed column.

[0015] More preferably, the dynamic pressure plate and the fixed pressure plate are arranged in groups of three, surrounding the outer periphery of the central plate. Both the dynamic pressure plate and the fixed pressure plate are frustum-shaped with an inclination angle of 45°. The fixed pressure plate rotates to the middle of the two dynamic pressure plates, lifting them up and causing them to rub against each other.

[0016] A method for drying tea using a tea drying machine includes the following steps:

[0017] Step 1: Hot air is generated inside the air inlet duct and injected into multiple exhaust ducts. The hot air enters the drying ring through the first and second conveying pipes and then exits through the air outlet, moving upward along the gaps in the drying ring.

[0018] Step 2: Open the top cover and pour an appropriate amount of tea into the drying drum. The tea leaves will pile up on multiple drying rings, and the hot air will blow the tea leaves up to dry them.

[0019] Step 3: Two servo motors drive the second rotating shaft and the first rotating shaft to rotate in opposite directions, and the second rotating shaft and the first rotating shaft drive the three drying rings to rotate, so that the adjacent drying rings rotate in opposite directions. The first conveying pipe and the second conveying pipe follow the rotation of the drying rings, so that the exhaust duct rotates in the sealed bearing.

[0020] Step four: The drying ring rotates and throws the tea leaves off its top, allowing them to come into contact with the hot air in the gaps of the drying ring. The first and second conveying pipes push the tea leaves off the top of the drying ring, allowing them to come into contact with the hot air discharged from the gaps of the drying ring, which can continuously stir and dry the tea leaves.

[0021] Step 5: After the tea leaves are dried, open the top cover, pour out the tea leaves from the drying drum, and then disconnect the power to the servo motor, heating element, and axial fan.

[0022] The beneficial effects of this invention are:

[0023] 1. The drying ring above the second sprocket and the second conveying pipe rotate clockwise, while the drying ring above the first sprocket and the first conveying pipe rotate counterclockwise. The first and second conveying pipes agitate the tea leaves, causing them to be quickly blown up by the hot air in the gaps between the drying rings. At the same time, the hot air flows inside the first and second conveying pipes and the drying rings. After being heated by the hot air, the temperature of the first and second conveying pipes and the drying rings rises. The first and second conveying pipes and the drying rings can heat the tea leaves, ensuring that the tea leaves are in uniform contact with the hot air and can also stir and heat the tea leaves. This ensures that the tea leaves are evenly heated on multiple drying rings, guaranteeing uniform drying of the tea leaves and providing the advantage of uniform tea drying.

[0024] 2. When multiple sealing rings move in opposite directions at intervals, the fixed pressure plate moves to the moving pressure plate. The inclined surface of the fixed pressure plate rests parallel to the inclined surface of the moving pressure plate, and the fixed pressure plate lifts the moving pressure plate. Due to gravity, the moving pressure plate generates positive pressure, causing it to rub against the fixed pressure plate. The fixed pressure plate and the moving pressure plate rotate due to friction. The moving pressure plate can squeeze the tea leaves on the inclined surface of the fixed pressure plate, squeezing out the moisture from the tea leaves, which can accelerate the drying of the tea leaves and has the advantage of high tea drying efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of part of the structure of the present invention. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of part of the structure of the present invention. Figure 2 ;

[0028] Figure 4This is a schematic diagram showing the distribution of the drying rings in this invention;

[0029] Figure 5 This is a schematic diagram of the connecting cylinder of the present invention;

[0030] Figure 6 This is a schematic diagram of the drying ring structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the extrusion device of the present invention;

[0032] Figure 8 This is a schematic diagram of the dynamic pressure plate and the top pressure plate of the present invention.

[0033] In the diagram: 1. Drying cylinder; 2. Top cover; 3. Servo motor; 4. Support frame; 5. Air inlet; 6. Axial flow fan; 7. Sealed bearing; 8. Connecting cylinder; 9. Exhaust cylinder; 10. Top cylinder; 11. First conveying pipe; 12. Second conveying pipe; 13. Sealing ring; 14. Drying ring; 15. First sprocket; 16. Second rotating shaft; 17. First rotating shaft; 18. Drive gear; 19. Center plate; 20. Connecting hole; 21. Air outlet; 22. Sliding column; 23. Dynamic pressure plate; 24. Fixed column; 25. Fixed pressure plate; 26. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-8 A tea drying machine includes a drying cylinder 1 and a top cover 2 fitted on its top. Multiple support frames 4 are fixed to the bottom plate of the drying cylinder 1. Two servo motors 3 and an air inlet duct 5 are fixed to the top and sides of the support frames 4, respectively. An axial flow fan 6 is fixed to the inner wall of the air inlet duct 5 via support rods. A sealed bearing 7 is nested at the top of the air inlet duct 5. A connecting cylinder 8 is nested around the sealed bearing 7. A top cylinder 10 is nested in the middle of another sealed bearing 7. Multiple sealed bearings 7, multiple connecting cylinders 8, and multiple exhaust ducts 9 are stacked and spaced apart. The exhaust ducts 9 have multiple... Each of the two conveying pipes is embedded with a first conveying pipe 11 or a second conveying pipe 12. A sealing ring 13 is fixed to the bottom of the first conveying pipe 11 and the second conveying pipe 12. A drying ring 14 is fixed to the sealing ring 13. A first spur gear 15 or a second spur gear 16 is fixed to the bottom of the drying ring 14. A pressing device is provided on the top of the multiple sealing rings 13. A center plate 20 is sleeved around the top of the air inlet duct 5. A second rotating shaft 17 and a first rotating shaft 18 are fixed to the power output ends of the two servo motors 3, respectively. Multiple drive gears 19 are fixed on both the second rotating shaft 17 and the first rotating shaft 18.

[0036] Preferably, the first sprocket 15 and the second sprocket 16 are sequentially spaced with decreasing diameters. The first sprocket 15 is meshed with the driving gear 19 on the first rotating shaft 18, and the second sprocket 16 is meshed with the driving gear 19 on the second rotating shaft 17. The rotation directions of the second rotating shaft 17 and the first rotating shaft 18 are opposite.

[0037] In specific implementation, the drive gear 19 on the first rotating shaft 18 drives the first spur gear 15 to rotate counterclockwise, and the drive gear 19 on the second rotating shaft 17 drives the second spur gear 16 to rotate clockwise, so that the rotation directions of the two adjacent drying rings 13 are opposite, and the rotation directions of the first conveying pipe 11 and the second conveying pipe 12 are opposite, which can make the relative speed between the first conveying pipe 11 and the second conveying pipe 12 very large. The first conveying pipe 11 and the second conveying pipe 12 cooperate with each other to stir the tea leaves, and at the same time increase the stirring efficiency of the first conveying pipe 11 and the second conveying pipe 12.

[0038] Preferably, air outlets 22 are provided on the inner and outer sides of the drying ring 14, and there are gaps between the multiple drying rings 14 without contact. The air outlets 22 are kept inclined. Connection holes 21 are provided on both sides of the exhaust duct 9. The two ends of the exhaust duct 9 are respectively fitted with two connecting cylinders 8. The multiple connecting cylinders 8 are spaced equidistantly above the center plate 20.

[0039] In practice, hot air is discharged through the air outlet 22 inside the drying ring 14, allowing hot air to enter the gaps between the multiple drying rings 14. The hot air is discharged through the annular gaps, which can both increase the flow rate of hot air to blow the tea leaves up and make the hot air move evenly from bottom to top in the drying cylinder 1, so that the hot air dries the tea leaves evenly. The connecting hole 21 is connected to the first conveying pipe 11 and the second conveying pipe 12, so that the hot air inside the exhaust duct 9 enters the first conveying pipe 11 and the second conveying pipe 12, so that the first conveying pipe 11 and the second conveying pipe 12 are heated while conveying hot air, so that the first conveying pipe 11 and the second conveying pipe 12 heat the tea leaves for drying.

[0040] Preferably, the sealing bearings 7 are sleeved on both ends of the connecting cylinder 8, and one end of the first conveying pipe 11 and the second conveying pipe 12 is located in the gap between the two sealing bearings 7. The connecting cylinder 8 is sleeved on the periphery of the sealing bearings 7, and multiple connecting cylinders 8 are stacked on top of the center plate 21. The sealing bearings 7 cause the exhaust pipe 9 to rotate inside the connecting cylinder 8 and ensure the seal between the exhaust pipe 9 and the connecting cylinder 8 to prevent hot air leakage and allow all the hot air in the exhaust pipe 9 to enter the drying ring 14.

[0041] The preferred drying ring 14 is hollow inside and its top opening is blocked by the sealing ring 13. Multiple drying rings 14 are arranged in descending order of diameter and are sleeved around the periphery of the center plate 20. The height of the drying ring 14, the sealing ring 13 and the top of the center plate 20 are consistent. The edge of the drying ring 14 is set to be inclined. The other end of the first conveying pipe 11 and the second conveying pipe 12 passes through the sealing ring 13. Both the first conveying pipe 11 and the second conveying pipe 12 are provided with a 90-degree bend.

[0042] In practice, the drying ring 14 above the second sprocket 16 and the second conveying pipe 12 rotate clockwise, while the drying ring 14 above the first sprocket 15 and the first conveying pipe rotate counterclockwise. The first conveying pipe 11 and the second conveying pipe 13 agitate the tea leaves, causing them to be quickly blown up by the hot air in the gap of the drying ring 14. At the same time, the hot air flows inside the first conveying pipe 11, the second conveying pipe 13 and the drying ring 14. After being heated by the hot air, the temperature of the first conveying pipe 11, the second conveying pipe 13 and the drying ring 14 rises, thus heating the tea leaves.

[0043] Preferably, an air filter screen is fixed to the bottom plate of the inner wall of the air inlet duct 5, and a heating tube is embedded in the side of the air inlet duct 5. The heating tube heats the air to form a hot airflow inside the air inlet duct 5.

[0044] In practice, the axial flow fan 6 generates airflow that moves from bottom to top, the heating tube heats the airflow inside the air inlet duct 5 to form hot airflow, the air filter filters the air entering the air inlet duct 5, and the hot air enters multiple exhaust ducts 9 and connecting ducts 8.

[0045] Preferably, the extrusion device includes a sliding column 23, a dynamic pressure plate 24, a fixed column 25, and a fixed pressure plate 26. Multiple sliding columns 23 and multiple fixed columns 25 are fixed to the top of multiple sealing rings 13. The dynamic pressure plate 24 is movably sleeved on the sliding column 23, and the fixed pressure plate 26 is fixedly sleeved on the fixed column 25. The dynamic pressure plate 24 and the fixed pressure plate 26 are divided into multiple groups of three and surround the periphery of the central plate 20. The dynamic pressure plate 24 and the fixed pressure plate 26 are both frustum-shaped with an inclination angle of 45°. The fixed pressure plate 26 rotates to the middle of the two dynamic pressure plates 24 to lift them up and rub against each other.

[0046] In practice, multiple sealing rings 13 and multiple drying rings 14 rotate independently and at intervals in opposite directions, causing multiple dynamic pressure plates 24 to rotate counterclockwise and clockwise. When the fixed pressure plate 26 encounters the dynamic pressure plate 24, the inclined surface of the fixed pressure plate 26 rests parallel to the inclined surface of the dynamic pressure plate 24, lifting the dynamic pressure plate 24. Due to gravity, the dynamic pressure plate 24 generates positive pressure, causing it to rub against the fixed pressure plate 26. The fixed pressure plate 26 and the dynamic pressure plate 24 rotate due to friction. The dynamic pressure plate 24 can squeeze the tea leaves on the inclined surface of the fixed pressure plate 26, squeezing out the moisture and accelerating the drying of the tea leaves. Furthermore, since the second rotating shaft 17 and the first rotating shaft 18 rotate at the same angular velocity, and multiple drive gears 19 are coaxially arranged, the second rotating shaft 17 and the first rotating shaft 18... The linear velocities of the multiple drive gears 19 on the moving shaft 18 are consistent. Since the multiple drive gears 19 mesh with the multiple first sprockets 15 and the multiple second sprockets 16, the linear velocities of the multiple drive gears 19, the multiple first sprockets 15 and the multiple second sprockets 16 are consistent. Since the diameters of the multiple first sprockets 15 and the multiple second sprockets 16 increase, the angular velocities of the multiple first sprockets 15 and the multiple second sprockets 16 decrease. This results in the angular velocities of the multiple moving pressure plates 24 being different. As their diameter increases, the angular velocity decreases. This allows the multiple moving pressure plates 24 to meet irregularly, which can both quickly stir the tea leaves and irregularly crush the tea leaves, evenly reducing the moisture content of the tea leaves.

[0047] A method for drying tea using a tea drying machine includes the following steps:

[0048] Step 1: Hot air is generated inside the air inlet duct 5 and injected into multiple air outlet ducts 9. The hot air enters the drying ring 14 through the first conveying pipe 11 and the second conveying pipe 12, and then exits through the air outlet 22 and moves upward along the gap of the drying ring 14.

[0049] Step 2: Open the top cover 2 and pour an appropriate amount of tea leaves into the drying cylinder 1. The tea leaves are piled up on multiple drying rings 14, and the hot airflow blows the tea leaves up to dry them.

[0050] Step 3: The two servo motors 3 drive the second rotating shaft 17 and the first rotating shaft 18 to rotate in opposite directions. The second rotating shaft 17 and the first rotating shaft 18 drive the three drying rings 14 to rotate, so that the adjacent drying rings 14 rotate in opposite directions. The first conveying pipe 11 and the second conveying pipe 12 follow the drying rings 14 to rotate, so that the exhaust pipe 9 rotates in the sealed bearing 7.

[0051] Step four: The drying ring 14 rotates and throws the tea leaves off its top, so that the tea leaves fall into the gaps of the drying ring 14 and come into contact with the hot air. The first conveying pipe 11 and the second conveying pipe 12 push the tea leaves off the top of the drying ring 14, so that the tea leaves come into contact with the hot air discharged from the gaps of the drying ring 14, which can continuously stir and dry the tea leaves.

[0052] Step 5: After the tea leaves are dried, open the top cover 2, pour out the tea leaves from the drying cylinder 1, and then disconnect the power to the servo motor 3, heating tube, and axial fan 6.

[0053] In this invention, during use, the power supply to the axial flow fan 6 and the heating tube is turned on. The axial flow fan 6 generates airflow that moves from bottom to top. The heating tube heats the airflow inside the air inlet duct 5 to form a hot airflow. The hot airflow moves from bottom to top inside the air inlet duct 5 and enters the connecting cylinder 8. Subsequently, the hot air fills multiple connecting cylinders 8 and the exhaust cylinder 9. The hot air enters the drying ring 14 through the first conveying pipe 11 and the second conveying pipe 12. The hot air is then discharged through the air outlet 22 and moves upward along the gaps of the drying ring 14. The top cover 2 is opened, an appropriate amount of tea leaves are poured into the drying cylinder 1, and then the top cover 2 is closed. The tea leaves accumulate on multiple drying rings 14, and the hot airflow blows the tea leaves up for drying. At the same time, the hot air heats the first conveying pipe 11, the second conveying pipe 12, and the sealing ring. The drying rings 13 and 14 heat the tea leaves to dry them. Then, the power supply of the two servo motors 3 is turned on. The two servo motors 3 drive the second rotating shaft 17 and the first rotating shaft 18 to rotate in opposite directions. The drive gear 19 on the first rotating shaft 18 drives the first spur gear 15 to rotate counterclockwise, and the drive gear 19 on the second rotating shaft 17 drives the second spur gear 16 to rotate clockwise. This makes the rotation directions of the two adjacent drying rings 13 opposite, and the rotation directions of the first conveying pipe 11 and the second conveying pipe 12 opposite. This can make the relative speed between the first conveying pipe 11 and the second conveying pipe 12 very large. The first conveying pipe 11 and the second conveying pipe 12 work together to stir the tea leaves. The tea leaves are quickly dried on the multiple drying rings 14.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tea drying machine, comprising a drying cylinder and a top cover fitted over it, wherein multiple support frames are fixed to the bottom plate of the drying cylinder, and two servo motors and an air inlet duct are fixed to the top and sides of the support frames respectively, and an axial flow fan is fixed to the inner wall of the air inlet duct via support rods, characterized in that: A sealing bearing is nested at the top of the air inlet duct, a connecting cylinder is nested around the sealing bearing, and a top cylinder is nested in the middle of another sealing bearing. Multiple sealing bearings, multiple connecting cylinders, and multiple exhaust ducts are stacked and spaced apart. A first conveying pipe or a second conveying pipe is embedded on both sides of the multiple exhaust ducts. A sealing ring is fixed at the bottom of the first conveying pipe and the second conveying pipe. A drying ring is fixed on the sealing ring. A first spur gear or a second spur gear is fixed at the bottom of the drying ring. A pressing device is provided at the top of the multiple sealing rings. A central plate is fitted around the top of the air inlet duct. A second rotating shaft and a first rotating shaft are fixed to the power output ends of the two servo motors, and multiple drive gears are fixed on both the second rotating shaft and the first rotating shaft. The extrusion device includes a sliding column, a dynamic pressure plate, a fixed column, and a constant pressure plate. The top of the plurality of sealing rings is fixed with a plurality of sliding columns and a plurality of fixed columns. The dynamic pressure plate is movably sleeved on the sliding column, and the constant pressure plate is fixedly sleeved on the fixed column. The dynamic pressure plate and the fixed pressure plate are arranged in groups of three, surrounding the outer perimeter of the central plate. Both the dynamic pressure plate and the fixed pressure plate are frustum-shaped with an inclination angle of 45°. The fixed pressure plate rotates to the middle of the two dynamic pressure plates, lifting them up and causing them to rub against each other. The drying ring is hollow inside and its top opening is blocked by a sealing ring. Multiple drying rings with decreasing diameters are sequentially fitted around the outer perimeter of the central plate. The height of the drying ring, the sealing ring, and the top of the central plate is consistent. Air vents are provided on the inner and outer sides of the drying ring. There are gaps between the multiple drying rings without contact, and the air vents are kept inclined. The first and second sprockets are nested in sequence with decreasing diameters, and the first sprocket is engaged with the driving gear on the first rotating shaft. The second spur gear meshes with the driving gear on the second rotating shaft, and the second rotating shaft and the first rotating shaft rotate in opposite directions. The exhaust duct has connection holes on both sides, and two connecting cylinders are respectively fitted at both ends of the exhaust duct. Multiple connecting cylinders are spaced equidistantly above the center plate. Sealed bearings are fitted at both ends of the connecting cylinders, and one end of the first conveying pipe and the second conveying pipe is located in the gap between the two sealed bearings. The edge of the drying ring is set to be inclined, and the other ends of the first and second conveying pipes pass through the sealing ring. Both the first and second conveying pipes are provided with a 90-degree bend. An air filter is fixed to the bottom plate of the inner wall of the air inlet duct, and a heating tube is embedded in the side of the air inlet duct. The heating tube heats the air to form a hot airflow inside the air inlet duct.

2. A method for drying tea using the tea drying machine according to claim 1, characterized in that, Includes the following steps: Step 1: Hot air is generated inside the air inlet duct and injected into multiple exhaust ducts. The hot air enters the drying ring through the first and second conveying pipes and then exits through the air outlet, moving upward along the gaps in the drying ring. Step 2: Open the top cover and pour an appropriate amount of tea into the drying drum. The tea leaves will pile up on multiple drying rings, and the hot air will blow the tea leaves up to dry them. Step 3: Two servo motors drive the second rotating shaft and the first rotating shaft to rotate in opposite directions, and the second rotating shaft and the first rotating shaft drive the three drying rings to rotate, so that the adjacent drying rings rotate in opposite directions. The first conveying pipe and the second conveying pipe follow the rotation of the drying rings, so that the exhaust duct rotates in the sealed bearing. Step four: The drying ring rotates and throws the tea leaves off its top, allowing them to come into contact with the hot air in the gaps of the drying ring. The first and second conveying pipes push the tea leaves off the top of the drying ring, allowing them to come into contact with the hot air discharged from the gaps of the drying ring, which can continuously stir and dry the tea leaves. Step 5: After the tea leaves are dried, open the top cover, pour out the tea leaves from the drying drum, and then disconnect the power to the servo motor, heating element, and axial fan.

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