Countercurrent centrifugal extraction equipment and extraction process for high-aroma cold-extracted tea soup

Abstract

According to the countercurrent centrifugal extraction equipment and technology for the high-aroma cold-extracted tea soup, a centrifugal unit comprises a shell and a rotary drum coaxially arranged in the shell, a gap exists between the shell and the rotary drum, and a light phase inlet, a light phase outlet, a heavy phase inlet and a heavy phase outlet are formed in the side wall of the shell; a light phase channel communicated with the light phase discharge port and a heavy phase channel communicated with the heavy phase discharge port are formed in the top of the rotary drum, a through groove is formed in the bottom of the rotary drum, a flow blocking disc and a separation net cylinder are coaxially arranged in the rotary drum, a containing space is formed between the inner wall of the separation net cylinder and the flow blocking disc, and a plurality of flexible balls are arranged in the containing space; when the light phase and the heavy phase enter the rotary drum through the through grooves, the rotary drum drives the flexible balls to rotate so that the flexible balls can collide with a thin film formed on the surface of part of the heavy phase flowing through the outer wall of the separation net barrel. The thin film on the surface of the heavy phase is broken, so that the contact area and the mass transfer efficiency of the light phase and the heavy phase are increased, and the quality and the extraction effect of the cold-extracted tea soup are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of beverage processing equipment, in particular to a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment and extraction process. BACKGROUND

[0002] Cold-brew tea can maximize the retention of aroma substances and nutrients in tea leaves due to its low-temperature long-time extraction process, effectively avoiding the damage to tea quality caused by high-temperature extraction, and ultimately presenting a fresh and soft taste and a rich and long-lasting aroma, which is deeply favored by consumers. With the increasing demand for high-quality cold-brew tea soup in the market, it has become an urgent need for the industry to develop efficient and precise special extraction equipment. Under this background, countercurrent centrifugal extraction technology has improved the preparation effect of high-aroma cold-brew tea soup due to its significant advantages in separation efficiency and material adaptability.

[0003] As shown in Figure 1 The core structure of the existing countercurrent centrifugal extractor mainly includes a centrifugal barrel 27, a first inlet 28, a second inlet 29, a first outlet 30, a second outlet 31, and a driving device 32. The working principle of the equipment is as follows: the light phase enters the centrifugal barrel 27 through the first inlet 28, and the heavy phase enters the centrifugal barrel 27 through the second inlet 29; under the drive of the driving device 32, the centrifugal barrel 27 rotates at high speed to generate centrifugal force; during the countercurrent contact process, due to the opposite flow directions of the two phases, a strong mutual dragging effect occurs at the phase interface, which promotes the material to turn over and mix thoroughly, creating favorable conditions for efficient mass transfer of solutes, and then realizing rapid distribution and mass transfer of solutes between the two phases. After the mass transfer process is completed, under the action of the strong centrifugal field, the light phase and the heavy phase are quickly separated according to their density difference: the heavy phase with higher density is thrown to the barrel wall of the centrifugal barrel 27 by the centrifugal force, and the light phase with lower density is gathered to the central area, and finally the light phase flows out from the first outlet 30 and the heavy phase flows out from the second outlet 31, completing a complete extraction operation. Among them, the light phase refers to the extraction solvent, and the heavy phase refers to the tea liquid.

[0004] However, a stable film is easily formed on the surface of the heavy phase during the extraction process of the existing countercurrent centrifugal extractor, which hinders the mass transfer efficiency of solutes between the two phases, resulting in insufficient extraction of target aroma components and active substances in tea, and ultimately affecting the quality and overall extraction effect of cold-brew tea soup. SUMMARY

[0005] In order to solve the problems of the prior art, the present application provides a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment and extraction process, which improves the quality and extraction effect of cold-brew tea soup.

[0006] The technical scheme adopted by the present application to solve the above technical problems is: a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment, comprising a centrifugal unit and a driving unit for driving the centrifugal unit to rotate, the centrifugal unit comprising a shell and a drum coaxially arranged in the shell, and there is a gap between the shell and the drum, the side wall of the shell is provided with a light phase inlet, a light phase outlet, a heavy phase inlet and a heavy phase outlet, the top of the drum is provided with a light phase channel communicated with the light phase outlet and a heavy phase channel communicated with the heavy phase outlet, the bottom of the drum is provided with a through groove, the drum is coaxially provided with a flow blocking disc and a separation screen cylinder, and a containing space is formed between the inner wall of the separation screen cylinder and the flow blocking disc, a plurality of flexible balls are arranged in the containing space, when the light phase and the heavy phase enter the drum through the through groove, the drum drives the flexible balls to rotate to make the flexible balls impact the film formed by part of the heavy phase surface flowing through the outer wall of the separation screen cylinder.

[0007] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the drum is coaxially provided with a rotating shaft, and the rotating shaft is located in the containing space, one end of the rotating shaft close to the bottom of the drum is coaxially connected with a sleeve, and the sleeve successively rotates through the flow blocking disc, the through groove and the shell, the part of the sleeve located in the containing space is provided with an exhaust channel for discharging the flexible balls, and the exhaust channel is provided with an exhaust assembly for closing or opening the exhaust channel.

[0008] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the exhaust assembly comprises an elastic plug and a pull rod, the elastic plug is arranged at the exhaust channel, and the pull rod extends into the sleeve along the axial direction of the sleeve and is connected with the elastic plug.

[0009] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the part of the sleeve extending out of the shell is communicated with a receiving barrel, the bottom of the receiving barrel is provided with a through hole for the pull rod to pass through, and the outer wall of the pull rod and the inner wall of the through hole are fitted.

[0010] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the diameter of the separation screen cylinder gradually decreases from top to bottom.

[0011] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the top of the separation screen cylinder is provided with an upwardly protruding arc-shaped portion, and the arc-shaped portion is provided with an opening for the rotating shaft to pass through.

[0012] As a further optimization of the present application, a high-aroma cold-brew tea soup countercurrent centrifugal extraction equipment: the pore size of the separation screen cylinder is smaller than the ball diameter of the flexible balls, and the pore size of the separation screen cylinder is smaller than the particle size of the heavy phase.

[0013] As a further optimization of the application of a high-aroma cold-brew tea soup countercurrent centrifugal extraction device: the bottom of the shell is provided with a mixing paddle, and a part of the mixing paddle enters the rotating drum through a through slot.

[0014] The technical solution adopted by the application to solve the above technical problems is: an extraction process based on the above-mentioned countercurrent centrifugal extraction device, which comprises the following steps: S1, starting the driving unit to drive the rotating drum to rotate around the axis of the rotating drum; S2, injecting the light phase into the gap between the shell and the rotating drum through the light phase inlet, and injecting the heavy phase into the gap between the shell and the rotating drum through the heavy phase inlet, to realize countercurrent feeding of the light phase and the heavy phase; S3, the light phase and the heavy phase enter the rotating drum through the through slot at the bottom of the rotating drum, and the flexible balls rotating with the rotating drum hit the film formed by the heavy phase surface of the outer wall of the separation screen cylinder; S4, the light phase that has completed extraction is discharged through the light phase discharge outlet, and the heavy phase that has completed extraction is discharged through the heavy phase discharge outlet.

[0015] Compared with the prior art, the application has the following beneficial effects: 1) The application co-axially arranges the flow resistance disc and the separation screen cylinder in the rotating drum, and forms an accommodation space between the inner wall of the separation screen cylinder and the flow resistance disc, and a plurality of flexible balls are arranged in the accommodation space. When the light phase and the heavy phase enter the rotating drum through the through slot, the rotating drum drives the flexible balls to rotate to make the flexible balls hit the film formed by the part of the heavy phase surface flowing through the outer wall of the separation screen cylinder, thereby breaking the film on the part of the heavy phase surface, increasing the contact area and mass transfer efficiency of the two phases, and further improving the quality and extraction effect of the cold-brew tea soup.

[0016] 2) The application is provided with a discharge through slot for discharging the flexible balls on the part of the sleeve located in the accommodation space, and a discharge assembly for closing or opening the discharge through slot is arranged at the discharge through slot; the discharge assembly comprises an elastic plug and a pull rod, the elastic plug is arranged at the discharge through slot, and the pull rod extends into the sleeve along the axial direction of the sleeve and is connected with the elastic plug; the part of the sleeve extending out of the shell is communicated with a storage barrel, and the bottom of the storage barrel is provided with a through hole through which the pull rod passes, and the outer wall of the pull rod and the inner wall of the through hole are fitted; when the extraction is completed and the flexible balls need to be replaced or cleaned, the rotating drum is stopped, and the operator pulls the pull rod extending out of the storage barrel outward, the pull rod drives the elastic plug to move along the axial direction of the sleeve, so that the discharge through slot changes from the sealed state to the completely open state; at this time, the flexible balls in the accommodation space enter the inner cavity of the sleeve through the opened discharge through slot under the action of gravity, and then slide along the inner wall of the sleeve to the connected storage barrel, thereby completing the centralized collection of the flexible balls. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a prior art schematic diagram; Figure 2 This is a schematic diagram of a flexible ball not rotating; Figure 3 This is a schematic diagram of the rotation of a flexible ball; Figure 4 This is a schematic diagram of the flexible sealing and discharge channel. Figure 5 This is a schematic diagram of the unsealed discharge channel of the elastic seal; The diagram shows the following components: 1. Centrifuge unit; 2. Outer shell; 3. Rotary drum; 4. Drive unit; 5. Light phase inlet; 6. Light phase outlet; 7. Light phase collection tank; 8. Heavy phase inlet; 9. Heavy phase outlet; 10. Heavy phase collection tank; 11. Light phase channel; 12. Heavy phase channel; 13. Flexible ball; 14. Motor; 15. Drive shaft; 16. Separating screen; 17. Arc-shaped section; 18. Guide section; 19. Discharge channel; 20. Elastic plug; 21. Pull rod; 22. Collection tank; 23. Baffle plate; 24. Mixing blade; 25. Rotary shaft; 26. Sleeve; 27. Centrifuge tank; 28. First inlet; 29. ​​Second inlet; 30. First outlet; 31. Second outlet; 32. Drive unit. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of the present invention should be understood as prior art known or should be known by those skilled in the art.

[0019] like Figure 2 and Figure 3 As shown, a high-aroma cold-brewed tea infusion countercurrent centrifugal extraction device includes a centrifugal unit 1 and a drive unit 4 for driving the centrifugal unit 1 to rotate. The centrifugal unit 1 includes a shell 2 and a drum 3 coaxially arranged inside the shell 2, with a gap between the shell 2 and the drum 3. The side wall of the shell 2 is provided with a light phase inlet 5, a light phase outlet 6, a heavy phase inlet 8, and a heavy phase outlet 9. The top of the drum 3 is provided with a light phase channel 11 communicating with the light phase outlet 6 and a heavy phase channel 12 communicating with the heavy phase outlet 9. The bottom of the drum 3 is provided with a through groove. A flow-blocking plate 23 and a separating screen cylinder 16 are coaxially arranged inside the drum 3, and a receiving space is formed between the inner wall of the separating screen cylinder 16 and the flow-blocking plate 23. A number of flexible balls 13 are arranged in the receiving space. When the light phase and the heavy phase enter the drum 3 through the through groove, the drum 3 drives the flexible balls 13 to rotate so that the flexible balls 13 impact the thin film formed on the surface of part of the heavy phase flowing through the outer wall of the separating screen cylinder 16.

[0020] The outer shell 2 of the centrifuge unit 1 is also provided with a light phase collection tank 7 and a heavy phase collection tank 10. The positions of the light phase inlet 5, the heavy phase inlet 8, the light phase outlet 6, the heavy phase outlet 9, the light phase collection tank 7 and the heavy phase collection tank 10 and their mutual cooperation are conventional prior art in this field, and will not be described in detail here.

[0021] After the equipment is started, the drive unit 4 drives the drum 3 to rotate stably at a set speed, creating a uniform centrifugal force field inside the drum 3. Subsequently, the light phase, serving as the extraction solvent, enters the space between the outer shell 2 and the drum 3 through the light phase inlet 5 on the side wall of the outer shell 2. Simultaneously, the heavy phase, serving as the tea extract, is introduced through the heavy phase inlet 8. The two phases mix and, under the action of centrifugal force and pressure difference, enter the drum 3 through the channel at the bottom of the drum 3. After entering the drum 3, the heavy phase moves outward under centrifugal force and flows through the outer wall of the separator cylinder 16; the light phase gathers towards the center of the drum 3. During this process, the rotating drum 3 drives the internal flexible balls 13 to move synchronously. The flexible balls 13 roll and impact the inner wall of the separator cylinder 16 within the containment space, continuously impacting the thin film on the surface of the heavy phase flowing through the outer wall of the separator cylinder 16, breaking up the film on this part of the heavy phase surface, increasing the contact area and mass transfer efficiency between the light and heavy phases. After extraction, the light phase, rich in tea aroma substances, is collected through the light phase channel 11 at the top of the drum 3 and discharged through the light phase outlet 6 of the outer shell 2. After subsequent processing, a highly aromatic extract product can be obtained. The extracted heavy phase is discharged through the heavy phase channel 12 from the corresponding heavy phase outlet 9, achieving efficient separation of the two phases.

[0022] In addition to setting flexible spheres 13 to reduce the film on the surface of the heavy phase, some spiral guide plates can also be set on the inner wall of the drum 3 to further reduce the film on the surface of the heavy phase through spiral guidance.

[0023] To facilitate regular disassembly and cleaning of the separator mesh cylinder 16 and the flexible ball 13, they are designed for detachable connection. The end face of the flow-blocking plate 23 facing the separator mesh cylinder 16 has an annular positioning groove, into which a food-grade sealing ring is embedded. The end of the separator mesh cylinder 16 has an annular boss that matches the positioning groove. Evenly distributed L-shaped locking holes are machined on the outer side of the boss. A rotatable locking tongue is installed on the flow-blocking plate 23 at the corresponding locking hole position. The end of the locking tongue is designed with a hook-like structure that matches the L-shaped locking hole. During assembly, the boss of the separator mesh cylinder 16 is inserted into the positioning groove of the flow-blocking plate 23. The separator mesh cylinder 16 is rotated to align the locking hole with the locking tongue, and then the locking tongue is rotated to achieve a tight lock. The sealing ring not only enhances the connection seal but also buffers vibrations during rotation. For disassembly, the locking tongue is rotated in the opposite direction to easily remove the separator mesh cylinder 16, facilitating cleaning of mesh blockages or replacement of the mesh cylinder.

[0024] To avoid contaminating the cold-brewed tea infusion and to reduce wear and tear on the flexible spheres 13, the flexible spheres 13 are made of food-grade perfluororubber or ultra-high molecular weight polyethylene. The material of the flexible spheres 13 is existing technology and will not be elaborated further here. Figure 2 and Figure 3 As shown, the drive unit 4 includes a motor 14 and a transmission shaft 15 coaxially connected to the output shaft of the motor 14. The transmission shaft 15 is connected to the drum 3. The model of the motor 14, the setting of its speed, and the transmission shaft 15 are all conventional prior art in this field and will not be described in detail here.

[0025] like Figure 4 As shown, a rotating shaft 25 is coaxially arranged inside the drum 3, and the rotating shaft 25 is located within the receiving space. A sleeve 26 is coaxially connected to one end of the rotating shaft 25 near the bottom of the drum 3. The sleeve 26 rotates sequentially through the flow-blocking plate 23, the through groove, and the outer shell 2. A sealing structure is provided between the sleeve 26 and the outer shell 2 to seal the gap between the outer wall of the sleeve 26 and the outer shell 2. The specific sealing method is conventional prior art in this field and will not be described in detail here. The portion of the sleeve 26 located within the receiving space is provided with a discharge through groove 19 for the flexible ball 13 to discharge. A discharge assembly for closing or opening the discharge through groove 19 is provided at the discharge through groove 19. The discharge assembly includes an elastic plug 20 and a pull rod 21. The elastic plug 20 is located at the discharge through groove 19, and the pull rod 21 extends axially into the sleeve 26 and is connected to the elastic plug 20. The part of the sleeve 26 extending out of the outer shell 2 is connected to the storage bucket 22. The bottom of the storage bucket 22 has a through hole for the pull rod 21 to pass through, and the outer wall of the pull rod 21 and the inner wall of the through hole are in contact.

[0026] During normal extraction operations, the discharge assembly is in a normally sealed state. The elastic plug 20, under its own elastic force, tightly covers the discharge channel 19 of the sleeve 26, isolating the containment space from the inner cavity of the sleeve 26. At this time, the drum 3 drives the shaft 25 and the flexible ball 13 to rotate synchronously. The flexible ball 13 continuously impacts a portion of the membrane of the heavy phase flowing through the outer wall of the separator cylinder 16 within the containment space, ensuring the stable progress of the extraction process. After extraction, when it is necessary to replace or clean the flexible ball 13, first stop the drum 3 rotation to ensure there is no centrifugal force within the containment space. Then, the operator pulls the lever 21 extending from the collection bucket 22. The lever 21 moves the elastic plug 20 axially along the sleeve 26, causing the discharge channel 19 to change from a sealed state to a fully open state. At this time, the flexible ball 13 in the containment space, under the action of gravity, enters the inner cavity of the sleeve 26 through the opened discharge channel 19, and then slides down the inner wall of the sleeve 26 into the connected collection bucket 22, completing the centralized collection of the flexible ball 13.

[0027] A discharge groove 19 is formed on the circumferential sidewall of the sleeve 26, and extends along the circumference of the sleeve 26. The discharge groove 19 does not need to completely penetrate the circumference of the sleeve 26; it can be set to cover one-quarter to one-half of the circumference of the sleeve 26. For example... Figure 5 As shown, in addition to the direct downward pulling method described above to open the discharge channel 19, the elastic seal 20 can also be configured as two parts. The first part is sleeved on the pull rod 21, and the second part is connected to the first part, with the thickness of the second part being less than that of the first part. The first part is compressed and extends outward from the discharge channel 19 to ensure the sealing of the discharge channel 19. Since the elastic seal 20 can deform under compression, pushing the pull rod 21 upward will compress the elastic seal 20 towards the rotating shaft 25. At this time, a channel for the flexible ball 13 to pass through is exposed between the discharge channel 19 and the elastic seal 20. As the pull rod 21 compresses the first part, the second part also moves to a certain extent. When the second part moves, it can move the surrounding flexible balls 13, facilitating the change of the position of the flexible balls 13 and thus facilitating the discharge of the flexible balls 13. Furthermore, three or four spiral guide vanes are arranged axially on the rotating shaft 25. After the drum 3 stops, it rotates in the opposite direction at a low speed, and the guide vanes push the residual flexible ball 13 to move towards the discharge channel 19.

[0028] To prevent the elastic seal 20 from contaminating the cold-brewed tea and to reduce its wear, the elastic seal 20 can be made of food-grade perfluoroether rubber or modified polytetrafluoroethylene elastomer. The material of the elastic seal 20 is conventional and existing technology in this field, and will not be elaborated further here. To further enhance the sealing between the elastic seal 20 and the discharge channel 19, annular serrated sealing patterns are machined on the mating surfaces of the elastic seal 20 and the discharge channel 19. A collection ring and a guide hole are provided on the inner wall of the sleeve 26 at the position corresponding to the discharge channel 19, so that even if a small amount of leakage occurs, it can flow back to the receiving space through the guide hole.

[0029] To facilitate the discharge of the flexible ball 13, the diameter of the separator cylinder 16 gradually decreases from top to bottom. The discharge channel 19 is formed in the part of the sleeve 26 near the bottom of the separator cylinder 16.

[0030] To prevent the flexible spheres 13 from overflowing from the separator cylinder 16, the top of the separator cylinder 16 is provided with an upwardly raised arc-shaped portion 17, and the arc-shaped portion 17 has an opening for the rotating shaft 25 to pass through. The inner wall of the arc-shaped portion 17 forms a guide portion 18. To prevent the flexible spheres 13 or the heavy phase from passing through the aperture of the separator cylinder 16, the aperture of the separator cylinder 16 is smaller than the diameter of the flexible spheres 13, and the aperture of the separator cylinder 16 is smaller than the particle size of the heavy phase.

[0031] A mixing blade 24 is located at the bottom of the outer shell 2, part of which extends into the drum 3 through a channel, working in conjunction with existing components. This mixing blade 24 pre-stirs the heavy-phase tea liquor entering the area between the outer shell 2 and the drum 3, breaking up static stratification and allowing for a more uniform distribution of aroma compounds, preventing excessively high local concentrations that could reduce mass transfer efficiency. Simultaneously, the stirring action prevents tea residue particles from accumulating and clogging the channel at the bottom of the outer shell 2, ensuring a continuous and stable flow of both light and heavy phase fluids into the drum 3, thus ensuring a continuous extraction process. Furthermore, the slight negative pressure effect created by the rotating mixing blade 24 accelerates the flow of tea liquor from the outer shell 2 into the drum 3, creating a synergistic feeding force with centrifugal force, reducing feed pressure fluctuations, and is particularly suitable for extracting high-viscosity tea liquors.

[0032] The hybrid blade 24 is a conventional existing technology in this field, and will not be described in detail here.

[0033] The extraction process, based on the aforementioned countercurrent centrifugal extraction equipment, includes the following steps: S1. Start the drive unit 4 to drive the drum 3 to rotate around the axis of the drum 3; S2. The light phase is injected into the gap between the outer shell 2 and the rotating drum 3 through the light phase inlet 5, and the heavy phase is injected into the gap between the outer shell 2 and the rotating drum 3 through the heavy phase inlet 8, so as to achieve countercurrent feeding of the light and heavy phases. S3. The light phase and the heavy phase enter the drum 3 through the through groove at the bottom of the drum 3, and the flexible ball 13, which rotates as the drum 3 rotates, impacts the surface of the heavy phase on the outer wall of the separator cylinder 16 to form a thin film. S4. The light phase after extraction is completed is discharged through the light phase outlet 6, and the heavy phase after extraction is completed is discharged through the heavy phase outlet 9.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-aroma cold-brewed tea infusion countercurrent centrifugal extraction device, comprising a centrifugal unit (1) and a drive unit (4) for driving the centrifugal unit (1) to rotate, the centrifugal unit (1) comprising a shell (2) and a drum (3) coaxially disposed within the shell (2), and there is a gap between the shell (2) and the drum (3), the side wall of the shell (2) is provided with a light phase inlet (5), a light phase outlet (6), a heavy phase inlet (8) and a heavy phase outlet (9), the top of the drum (3) is provided with a light phase channel (11) communicating with the light phase outlet (6) and a heavy phase channel (12) communicating with the heavy phase outlet (9), and the bottom of the drum (3) is provided with a through groove, characterized in that: A flow-blocking disk (23) and a separator cylinder (16) are coaxially arranged inside the drum (3), and a receiving space is formed between the inner wall of the separator cylinder (16) and the flow-blocking disk (23). Several flexible balls (13) are arranged in the receiving space. When the light phase and the heavy phase enter the drum (3) through the through groove, the drum (3) drives the flexible balls (13) to rotate so that the flexible balls (13) hit the thin film formed on the surface of the heavy phase flowing through the outer wall of the separator cylinder (16).

2. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 1, characterized in that: A rotating shaft (25) is coaxially arranged inside the drum (3), and the rotating shaft (25) is located in the accommodating space. A sleeve (26) is coaxially connected to one end of the rotating shaft (25) near the bottom of the drum (3). The sleeve (26) rotates through the flow-blocking plate (23), the through groove and the outer shell (2) in sequence. The part of the sleeve (26) located in the accommodating space is provided with a discharge through groove (19) for the flexible ball (13) to be discharged. A discharge component is provided at the discharge through groove (19) for closing or opening the discharge through groove (19).

3. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 2, characterized in that: The discharge assembly includes an elastic plug (20) and a pull rod (21). The elastic plug (20) is disposed at the discharge channel (19), and the pull rod (21) extends into the sleeve (26) along the axial direction of the sleeve (26) and is connected to the elastic plug (20).

4. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 3, characterized in that: The portion of the sleeve (26) extending out of the outer shell (2) is connected to a storage bucket (22). The bottom of the storage bucket (22) has a through hole through which the pull rod (21) passes, and the outer wall of the pull rod (21) and the inner wall of the through hole are in contact.

5. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 2, characterized in that: The diameter of the separator tube (16) gradually decreases from top to bottom.

6. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 5, characterized in that: The top of the separator tube (16) is provided with an upwardly raised arc-shaped part (17), and the arc-shaped part (17) has an opening for the rotating shaft (25) to pass through.

7. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 1, characterized in that: The aperture of the separating mesh cylinder (16) is smaller than the diameter of the flexible ball (13), and the aperture of the separating mesh cylinder (16) is smaller than the particle size of the heavy phase.

8. The high-aroma cold-brewed tea infusion countercurrent centrifugal extraction equipment as described in claim 1, characterized in that: The bottom of the outer casing (2) is provided with a mixing blade (24), and a part of the mixing blade (24) enters the drum (3) through a through groove.

9. The extraction process, characterized in that, Based on the countercurrent centrifugal extraction apparatus as described in claim 1, the process includes the following steps: S1. Start the drive unit (4) to drive the drum (3) to rotate around the axis of the drum (3); S2. The light phase is injected into the gap between the shell (2) and the drum (3) through the light phase inlet (5), and the heavy phase is injected into the gap between the shell (2) and the drum (3) through the heavy phase inlet (8) to achieve countercurrent feeding of the light and heavy phases; S3, the light phase and the heavy phase enter the drum (3) through the through groove at the bottom of the drum (3), and the flexible ball (13) that rotates with the drum (3) hits the heavy phase surface on the outer wall of the separator cylinder (16) to form a thin film. S4. The light phase after extraction is completed is discharged through the light phase outlet (6), and the heavy phase after extraction is completed is discharged through the heavy phase outlet (9).

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