A stirring jet black tea fermentation device

Abstract

The application relates to the technical field of tea processing, and discloses a stirring jet-type black tea fermentation device, which comprises a fermentation cylinder, a rotating bin driven by a gear ring is rotationally connected in the fermentation cylinder, a stationary fixing shaft penetrates through the rotating bin at the inner shaft core of the rotating bin, a sleeve is arranged on the outside of the fixing shaft, the sleeve is connected with a meshing wall through elastic extension rods, the meshing wall is self-adaptingly scraped by the thrust of a slide column and a spring, accumulation in dead corners is prevented, the elastic extension rods II on the outer wall of the sleeve are clamped into the rotating bin limiting grooves to realize synchronous revolution, the coil spring between the fixing shaft and the sleeve is twisted to store energy, when the extension rod II is extruded out of the limiting groove by the stationary arc-shaped cylinder, the coil spring instantaneously releases the elastic force to drive the meshing wall to rotate reversely, and the bottom tea is deeply turned and thrown. In the turning process of black tea fermentation, the device effectively prevents the accumulation and caking of tea with high humidity and high viscosity in the dead corners of the rotating bin inner wall, and ensures that all the tea can be fully turned, stirred and mixed.

Description

Technical Field

[0001] This invention relates to the field of tea processing technology, specifically to a stirring jet-type black tea fermentation device. Background Technology

[0002] Fermentation is a key process that determines the quality and flavor of black tea. Stirred black tea fermentation equipment is a special mechanical device used to hold the kneaded tea material and provide it with a turning and mixing action.

[0003] In existing large-scale black tea production, processing enterprises typically use large drum-type fermentation machines for fermentation. During actual operation, workers load tea leaves into the fermentation drum, which is then driven by a motor to rotate slowly around its central axis. Alternatively, rigid turning plates fixed inside the drum can be used to lift the tea leaves from the bottom to a higher position and then let them fall freely. This conventional mechanical turning method aims to create relative displacement of the concentrated tea leaves, allowing heat to dissipate from the tea layer and come into contact with air, thus maintaining the physical environment required for the fermentation reaction.

[0004] The drawback of existing technology is that, in the early stages of fermentation, black tea leaves have high moisture and viscosity due to the large amount of tea juice overflowing from their surface. When turned over inside the fermentation chamber, they often adhere to the inner wall of the chamber or accumulate in the edge areas. Existing rigid turning components lack radial expansion and contraction compensation capabilities, making it impossible to closely fit and dynamically scrape away the tea leaves that follow the contour changes of the inner wall. This results in the tea leaves adhering to the dead corners of the inner wall being difficult to effectively peel off and re-disperse. As a result, the tea leaves adhering to the edge wall remain in a static, clump-like state for a long time, unable to be fully turned and mixed with the tea leaves in other areas. This causes significant differences in the degree of fermentation of tea leaves in different locations within the same batch, making it difficult to ensure the uniformity of the fermentation quality of the entire batch of black tea. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a stirring jet-type black tea fermentation device to address the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a stirring jet-type black tea fermentation device, including a fermentation cylinder, and further comprising: A support frame is fixedly connected to the outer wall of the fermentation tank to support the fermentation tank; The rotating chamber is rotatably connected to the inner wall of the fermentation cylinder. It is used to store tea leaves and to turn the tea leaves over when it rotates. A toothed ring is fixedly connected to one side of the outer wall of the rotating chamber, and the fermentation cylinder has openings on both sides. The toothed ring is used to drive the rotating chamber to rotate. A fixing mechanism, located inside the rotating chamber, is used to install the stirring mechanism to agitate the tea leaves; Fixed mechanisms include: A fixed shaft is located at the center of the inner wall of the rotating chamber, and both ends of the fixed shaft movably pass through the rotating chamber and extend to both sides. Multiple L-shaped connecting rods are fixedly connected to the outer wall of the fixed shaft and connected to one side of the outer wall of the fermentation tank; The stirring mechanism includes: A sleeve is fitted onto the outer wall of a fixed shaft, and fixing rings are fixedly fitted on both sides of the outer wall of the sleeve. Multiple elastic telescopic rods are fixedly connected to the front and rear sides of the outer wall of the fixed ring, respectively. Multiple tea leaves are fixedly connected to one end of the elastic telescopic rod away from the fixed ring, and are used to stir the tea leaves.

[0007] Preferably, the stirring mechanism further includes: Two rings are connected to the outer wall of the fixed shaft by multiple connecting rods; Multiple arc-shaped sliding sleeves are arranged in pairs and slidably fitted onto the outer walls of the two circular rings. Multiple sliding columns are fixedly connected to the end of the deflector net away from the elastic telescopic rod, and the outer wall of the sliding column slides within the mounting sleeve on the arc-shaped sliding sleeve; A spring, fitted on the outer wall of the sliding column, works with an elastic telescopic rod to push the tea leaf net against the inner wall of the rotating chamber, thus agitating the tea leaves.

[0008] Preferably, the inner opening of the arc-shaped sliding sleeve is larger than the diameter of the connecting rod but smaller than the diameter of the ring, so that the arc-shaped sliding sleeve can slide on the ring and pass over the connecting rod.

[0009] Preferably, the outer wall of the sleeve is provided with a reset mechanism for cyclically driving the stirring mechanism to rotate, the reset mechanism comprising: The second elastic telescopic rod is fixedly connected to the outer wall of the sleeve, and the telescopic end is arc-shaped and fits against the inner wall of the rotating chamber; Two synchronizing rods are fixedly connected to the outer walls of the second elastic telescopic rod on both sides, and are respectively connected to the front deflector to drive the deflector to rotate; Multiple limiting grooves are equidistantly arranged in a circle on the inner wall of the rotating chamber. When the telescopic end of the second elastic telescopic rod is inserted into the limiting groove, it pushes the second elastic telescopic rod to rotate.

[0010] Preferably, the reset mechanism further includes: An arc-shaped cylinder is installed on the inner wall of the rotating chamber and connected to the outer wall of the fixed shaft by two fixed rods. One end of the second elastic telescopic rod is wedge-shaped and, when rotated, fits into the arc-shaped cylinder, and the telescopic end of the second elastic telescopic rod slides out of the limiting groove.

[0011] Preferably, the outer wall of the fixed shaft is provided with two annular grooves, and the inner wall of each annular groove is provided with a coil spring, and the two ends of the coil spring are respectively connected to the fixed shaft and the sleeve. When the extension end of the elastic telescopic rod 2 slides out of the limiting groove, the sleeve is reset.

[0012] Preferably, the outer wall of the arc-shaped cylinder has multiple air outlets, and one end of the arc-shaped cylinder has a circular hole for introducing gas into the arc-shaped cylinder; The outer wall of the rotating chamber has multiple air inlets that communicate with the arc-shaped cylinder on one side; An air inlet pipe is installed on one side of the outer wall of the fermentation cylinder, and the air inlet pipe is connected to the air inlet hole to introduce gas into the arc-shaped cylinder.

[0013] Preferably, the rotating chamber has a through hole away from the toothed ring, and a chamber door is installed at the through hole for taking out and putting in tea leaves; The outer wall of the rotating chamber has multiple separation holes, and the bottom of the fermentation cylinder has a waste outlet for discharging waste and balancing the internal air pressure of the fermentation cylinder.

[0014] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This stirring jet-type black tea fermentation device, by setting a rotating chamber driven by a toothed ring inside the fermentation cylinder, installing a stationary fixed shaft at the center of the internal axis, and fitting a movable sleeve outside the fixed shaft, utilizes an elastic telescopic rod to connect a mesh with a spring and a sliding column. As the mesh rotates with the sleeve, it can use the continuous radial thrust of the spring to keep it tightly attached to the inner wall of the rotating chamber for sliding and scraping. This effectively prevents the tea leaves from accumulating and clumping in the dead corners of the rotating chamber during the black tea fermentation and turning process, and ensures that all tea leaves are fully turned and stirred.

[0015] 2. This stirring jet-type black tea fermentation device uses a spring-loaded elastic telescopic rod connected to the outer wall of the sleeve. The end of the rod is inserted into a limiting groove on the inner wall of the rotating chamber to rotate synchronously with the rotating chamber. A coil spring is installed between the fixed shaft and the sleeve to accumulate elastic force. The arc-shaped cylinder suspended above physically squeezes the elastic telescopic rod, causing it to slide out of the limiting groove and release the power lock. This allows the coil spring to release its elastic force instantly, driving the screen to rotate rapidly in the opposite direction. This achieves a deep reverse turning of the tea leaves at the bottom, thereby improving the air permeability of the bottom material.

[0016] 3. This stirring jet-type black tea fermentation device, by installing an air inlet pipe on the outer wall of the fermentation cylinder and connecting it to the air inlet hole on the surface of the rotating chamber through a rotary sealing joint, introduces externally regulated fermentation gas into the interior of the suspended, stationary arc-shaped cylinder above the fixed shaft. Combined with multiple air outlets distributed on the surface of the arc-shaped cylinder, the fermentation gas ejected from the outlets at the moment the elastic telescopic rod touches the arc-shaped cylinder and retracts, causing the tea leaves to be scattered in the air by the net, can directly penetrate the loosely suspended tea particles over a large area. This significantly increases the contact area between the tea leaves and the fermentation gas, promoting more uniform fermentation of the black tea.

[0017] 4. This stirring jet-type black tea fermentation device uses multiple radially distributed connecting rods to fix and support the ring on the outer wall of the fixed shaft, and an arc-shaped sliding sleeve is fitted on the outside of the sliding column inside the screen to allow it to slide around the entire circumference of the ring. An opening groove with a width greater than the outer diameter of the connecting rod and smaller than the outer diameter of the ring is opened on the side of the arc-shaped sliding sleeve facing the fixed shaft, so that the sliding sleeve can smoothly pass over the position of the connecting rod without falling off when sliding along the track. This ensures that the screen can perform unobstructed, adaptive scraping and stable operation of the screen around the entire circumference inside the rotating chamber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the stirring mechanism of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the reset mechanism and stirring mechanism of the present invention.

[0019] In the diagram: 1. Fermentation tank; 2. Support frame; 3. Rotary chamber; 4. Gear ring; 5. Fixing mechanism; 51. Fixing shaft; 52. L-shaped connecting rod; 6. Stirring mechanism; 61. Sleeve; 62. Fixing ring; 63. Elastic telescopic rod one; 64. Pulley; 65. Connecting rod; 66. Circular ring; 67. Arc-shaped sliding sleeve; 68. Sliding column; 69. Spring; 7. Reset mechanism; 71. Elastic telescopic rod II; 72. Synchronizing rod; 73. Limiting groove; 74. Arc-shaped cylinder; 75. Fixing rod; 76. Coil spring; 8. Air intake pipe; 9. Door; 10. Air intake port. Detailed Implementation

[0020] The technical solutions of 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. Example

[0021] Please see Figure 1-7 This invention provides a stirring jet-type black tea fermentation device, including a fermentation cylinder 1 horizontally arranged and with a support frame 2 fixed on its periphery. The support frame 2 is used to stably support the fermentation cylinder 1 on the ground. A rotating chamber 3 is rotatably connected inside the fermentation cylinder 1. The internal space of the rotating chamber 3 is used to load and store black tea leaves to be fermented. The two sides of the fermentation cylinder 1 are open. A toothed ring 4 is fixedly sleeved on one side of the outer wall of the rotating chamber 3. An external motor drives the rotating chamber 3 to rotate continuously inside the fermentation cylinder 1 by driving the gear meshing with the toothed ring 4.

[0022] The rotating chamber 3 is equipped with a fixing mechanism 5, which includes a fixing shaft 51 located at the center of the rotating chamber 3. Both ends of the fixing shaft 51 extend movably through the end faces of both sides of the rotating chamber 3 and outwards. Multiple L-shaped connecting rods 52 are fixedly connected to the outer walls of the extended sections of the fixing shaft 51. The other ends of the L-shaped connecting rods 52 are fixedly connected to the outer wall of the fermentation tank 1. Through the support and positioning of the L-shaped connecting rods 52, the fixing shaft 51 remains stationary while the rotating chamber 3 rotates.

[0023] The rotating chamber 3 is equipped with a stirring mechanism 6, which includes a sleeve 61 that is movably fitted onto the outer wall of the fixed shaft 51. Fixed rings 62 are fixedly fitted onto the front and rear sides of the outer wall of the sleeve 61. Multiple elastic telescopic rods 63 are fixedly connected to the upper and lower parts of the outer wall of the fixed rings 62. Multiple turning nets 64 are fixedly connected to the ends of the elastic telescopic rods 63 away from the fixed rings 62. The turning nets 64 are used to agitate the tea leaves against the inner wall of the rotating chamber 3.

[0024] To ensure that the mesh 64 remains tightly fitted to the inner wall of the rotating chamber 3 during the flipping process to prevent tea leaves from accumulating in dead corners, two rings 66 are fixedly connected to the outer wall of the fixed shaft 51 via multiple radially distributed connecting rods 65. Multiple arc-shaped sliding sleeves 67 are slidably fitted onto the outer wall of the rings 66. Multiple sliding columns 68 are fixedly connected to the side end of the mesh 64 away from the elastic telescopic rod 63. The outer wall of the sliding columns 68 is slidably inserted into the mounting sleeves provided outside the arc-shaped sliding sleeves 67. A compressed spring 69 is fitted onto the outer wall of the sliding column 68, with both ends of the spring 69 abutting against the mesh 64 and the arc-shaped sliding sleeves 67, respectively.

[0025] The arc-shaped sliding sleeve 67 has a continuous open groove on the side facing the fixed shaft 51. The width of the open groove is greater than the outer diameter of the connecting rod 65, and the width of the open groove is smaller than the outer diameter of the cross-section of the ring 66. With the above structure, the arc-shaped sliding sleeve 67 can avoid the connecting rod 65 and not fall off the ring 66 when sliding along the ring 66. Example

[0026] Please see Figure 1-7 Based on the above embodiments, a reset mechanism 7 is provided on the outer wall of the sleeve 61. The reset mechanism 7 is used to cooperate with the stirring mechanism 6 to realize the energy storage-instant release type stirring of the tea leaves. The reset mechanism 7 includes a second elastic telescopic rod 71 fixedly connected to the outer wall of the sleeve 61. The second elastic telescopic rod 71 has an internal spring that provides an outward pushing force, and the telescopic end of the second elastic telescopic rod 71 has an arc-shaped and wedge-shaped joint surface, which fits tightly against the inner wall of the rotating chamber 3. Synchronizing rods 72 are fixedly connected to both sides of the outer wall of the second elastic telescopic rod 71. The two synchronizing rods 72 are fixedly connected to the front deflector 64, so that the sleeve 61, the second elastic telescopic rod 71 and the deflector 64 form a rigid linkage unit that rotates synchronously.

[0027] The inner wall of the rotating chamber 3 is provided with multiple limiting grooves 73 at equal intervals along the circumference. The outer wall of the fixed shaft 51 is fixedly supported by an arc-shaped cylinder 74 by two fixed rods 75. The arc-shaped cylinder 74 is located in the space above the inner wall of the rotating chamber 3. The outer wall of the fixed shaft 51 is provided with two annular grooves. A coil spring 76 is installed on the inner wall of each annular groove. The inner end of the coil spring 76 is fixedly connected to the fixed shaft 51, and the outer end is fixedly connected to the inner wall of the sleeve 61.

[0028] Working principle: When the gear ring 4 drives the rotating chamber 3 to rotate slowly, the end of the elastic telescopic rod 71 presses against the inner wall of the rotating chamber 3. When the limiting groove 73 rotates to align with the elastic telescopic rod 71, the telescopic end of the elastic telescopic rod 71 pops out instantly under the action of internal elastic force and gets stuck inside the limiting groove 73. After it gets stuck, the rotational power of the rotating chamber 3 is forced through the limiting groove 73 to push the elastic telescopic rod 71 to rotate synchronously and in the same direction as the rotating chamber 3. Due to the connecting action of the synchronizing rod 72, the sleeve 61 and all the guide nets 64 are forced to move, maintaining relative stillness with the rotating chamber 3 and working together. During the synchronous lifting process of this revolution, the rotation of the sleeve 61 causes the coil spring 76 to continuously undergo torsional deformation, accumulating elastic potential energy. When the elastic telescopic rod 71 follows the rotation of the rotating chamber 3 to the position where it encounters the stationary suspended arc-shaped cylinder 74, the wedge-shaped guide surface at the end of the elastic telescopic rod 71 physically interferes with and contacts the outer wall of the arc-shaped cylinder 74. The physical outer contour of the arc-shaped cylinder 74 forcibly squeezes and contracts the elastic telescopic rod 71 inward, forcing the telescopic end of the elastic telescopic rod 71 to completely slide out of the limiting groove 73, thus releasing the transmission lock of the rotating chamber 3 on the stirring mechanism 6. Example

[0029] Please see Figure 1-7 Based on the above embodiments, an air inlet pipe 8 is installed on the outer wall of the fermentation tank 1, and multiple air inlets 10 are opened on the outer wall of the rotating chamber 3. The air inlets 10 are connected to the air inlet pipe 8 through a rotary sealing joint, and the air inlets 10 are connected to one end of the arc-shaped cylinder 74 through an air passage pipe. Multiple air outlets are opened on the upper part of the outer wall of the arc-shaped cylinder 74 for conveying fermentation gas into the rotating chamber 3.

[0030] One end of the rotating chamber 3 has a through hole and a chamber door 9 for adding or removing tea leaves. The outer wall of the rotating chamber 3 also has multiple separation holes. The diameter of the separation holes is smaller than the minimum geometric size of black tea leaves. The bottom of the fermentation cylinder 1 is provided with a waste outlet for discharging tea leaf debris.

[0031] During the fermentation and turning process, an external air source (such as oxygen-enriched air after temperature and humidity regulation) enters the air inlet 10 through the air inlet pipe 8 and is eventually introduced into the stationary arc-shaped cylinder 74. The gas is then ejected into the rotating chamber 3 through multiple air outlets on the arc-shaped cylinder 74. The arc-shaped cylinder 74 serves not only as a mechanical limiting component that forces the elastic telescopic rod 71 to disengage, but also as a gas ejection device for fermentation gases. Because the elastic telescopic rod 71 disengages precisely at the instant it touches the arc-shaped cylinder 74, the space in which the net 64 instantly rebounds and throws the tea leaves is exactly below the arc-shaped cylinder 74. Therefore, when the tea leaves are violently scattered in the air by the net 64 to form a loose suspension, the fermentation gas sprayed from the arc-shaped cylinder 74 can penetrate the suspended tea leaves with the largest area and the most uniformity, which greatly improves the contact efficiency between the black tea polyphenol oxidase and oxygen, promotes uniform fermentation, and the small waste such as debris and tea hairs produced during the fermentation process will leak out from the separation hole on the outer wall of the rotating chamber 3, fall into the bottom of the fermentation cylinder 1 and be discharged through the waste outlet. The setting of the separation hole and the waste outlet can also balance the air pressure between the fermentation cylinder 1 and the outside, ensuring the smooth air intake and spray process.

[0032] This invention provides a stirring jet-type black tea fermentation device. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A stirring jet-type black tea fermentation device, comprising a fermentation cylinder (1), characterized in that, Also includes: The support frame (2) is fixedly connected to the outer wall of the fermentation cylinder (1) to support the fermentation cylinder (1). Rotating chamber (3) is rotatably connected to the inner wall of fermentation cylinder (1) for storing tea leaves and turning the tea leaves over when rotating; A toothed ring (4) is fixedly connected to one side of the outer wall of the rotating chamber (3), and the fermentation cylinder (1) has openings on both sides. The toothed ring (4) is used to drive the rotating chamber (3) to rotate. The fixing mechanism (5) is located inside the rotating chamber (3) and is used to install the stirring mechanism (6) to stir the tea leaves; The fixed mechanism (5) includes: A fixed shaft (51) is set at the center of the inner wall of the rotating chamber (3), and the two ends of the fixed shaft (51) respectively move through the rotating chamber (3) and extend to both sides; Multiple L-shaped connecting rods (52) are fixedly connected to the outer wall of the fixed shaft (51) and connected to one side of the outer wall of the fermentation cylinder (1); The stirring mechanism (6) includes: A sleeve (61) is fitted onto the outer wall of a fixed shaft (51), and fixed rings (62) are fixedly fitted on both sides of the outer wall of the sleeve (61). Multiple elastic telescopic rods (63) are fixedly connected to the front and rear sides of the outer wall of the fixed ring (62); Multiple tea leaves (64) are fixedly connected to the end of the elastic telescopic rod (63) away from the fixed ring (62) and are used to stir the tea leaves.

2. The stirring jet-type black tea fermentation device according to claim 1, characterized in that: The stirring mechanism (6) further includes: Two rings (66) are connected to the outer wall of the fixed shaft (51) by multiple connecting rods (65); Multiple arc-shaped sliding sleeves (67) are slidably fitted onto the outer walls of the two circular rings (66) in pairs; Multiple sliding columns (68) are fixedly connected to the end of the deflector (64) away from the elastic telescopic rod (63), and the outer wall of the sliding column (68) slides within the mounting sleeve on the arc-shaped sliding sleeve (67); Spring (69) is fitted on the outer wall of slide column (68) and, together with elastic telescopic rod (63), pushes the tea net (64) to fit against the inner wall of rotating chamber (3) to move the tea leaves.

3. The stirring jet-type black tea fermentation device according to claim 2, characterized in that: The inner opening of the arc-shaped sliding sleeve (67) is larger than the diameter of the connecting rod (65) and smaller than the diameter of the ring (66) so that the arc-shaped sliding sleeve (67) can slide on the ring (66) and can pass over the connecting rod (65).

4. The stirring jet-type black tea fermentation device according to claim 3, characterized in that: The outer wall of the sleeve (61) is provided with a reset mechanism (7) for cyclically driving the stirring mechanism (6) to rotate. The reset mechanism (7) includes: The second elastic telescopic rod (71) is fixedly connected to the outer wall of the sleeve (61), and the telescopic end is arc-shaped and fits against the inner wall of the rotating chamber (3); Two synchronizing rods (72) are fixedly connected to the outer walls of the second elastic telescopic rod (71) on both sides, and are connected to the front dial net (64) to drive the dial net (64) to rotate. Multiple limiting grooves (73) are equidistantly arranged on the inner wall of the rotating chamber (3). When the telescopic end of the elastic telescopic rod (71) is inserted into the limiting groove (73), it pushes the elastic telescopic rod (71) to rotate.

5. The stirring jet-type black tea fermentation device according to claim 4, characterized in that: The reset mechanism (7) further includes: An arc-shaped cylinder (74) is installed on the inner wall of the rotating chamber (3) and connected to the outer wall of the fixed shaft (51) by two fixed rods (75); One end of the elastic telescopic rod (71) is wedge-shaped and, when rotated, it fits against the arc-shaped cylinder (74), after which the telescopic end of the elastic telescopic rod (71) slides out of the limiting groove (73).

6. The stirring jet-type black tea fermentation device according to claim 5, characterized in that: The outer wall of the fixed shaft (51) is provided with two annular grooves. Each annular groove is provided with a coil spring (76) on its inner wall. The two ends of the coil spring (76) are connected to the fixed shaft (51) and the sleeve (61) respectively. When the extension end of the elastic telescopic rod (71) slides out of the limiting groove (73), the sleeve (61) is reset.

7. The stirring jet-type black tea fermentation device according to claim 6, characterized in that: The outer wall of the arc-shaped cylinder (74) is provided with multiple air outlets, and one end of the arc-shaped cylinder (74) is provided with a circular hole for introducing gas into the arc-shaped cylinder (74); The rotating chamber (3) has multiple air inlets (10) on one side of its outer wall that communicate with the arc-shaped cylinder (74). An air inlet pipe (8) is installed on one side of the outer wall of the fermentation cylinder (1), and the air inlet pipe (8) is connected to the air inlet hole (10) to introduce gas into the arc-shaped cylinder (74).

8. The stirring jet-type black tea fermentation device according to claim 7, characterized in that: The rotating chamber (3) has a through hole away from the toothed ring (4), and a chamber door (9) is installed at the through hole for taking out and putting in tea leaves; The outer wall of the rotating chamber (3) is provided with multiple separation holes, and the bottom of the fermentation cylinder (1) is provided with a waste outlet for discharging waste and balancing the internal air pressure of the fermentation cylinder (1).

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