Astragalus mongholicus composite tea fermentation device and fermentation method

Abstract

The invention relates to the technical field of tea fermentation, in particular to a fermentation device and a fermentation method for radix astragali composite tea. The device comprises a tea fermentation tank used for preparing the astragalus membranaceus compound tea, a separation tank used for adding tea components and water is arranged at the axis of the tea fermentation tank, and the separation tank rotates around the axis and is located below the liquid level in the tea fermentation tank; in cooperation with the adsorption effect of the extraction pump, the loose-leaf plate rotates downwards to expose the impurity removal channel, so that the tea components with the effective components extracted penetrate through the impurity removal channel, and the tea components with the effective components not extracted stay in the transition area and do not penetrate through the impurity removal channel to enter the completion area; after the tea components of which the effective components are extracted penetrate through the impurity removal channel and the pressing of the gravity of the tea components is lost, the loose-leaf plate is reset under the action of the restoring force of the coil spring, so that the impurity removal channel is sealed again, and the tea components of which the effective components are extracted slide to the top of the loose-leaf plate.

Description

Technical Field

[0001] This invention relates to the field of tea fermentation technology, and more specifically, to an astragalus compound tea fermentation device and fermentation method. Background Technology

[0002] Astragalus compound tea is made by fermenting tea leaves (such as black tea or green tea) as a base and astragalus as an additive. When astragalus and tea leaves are initially added to the fermentation tank, they typically float on the surface due to their low moisture content and loose structure. As fermentation progresses, the moisture content of the astragalus and tea leaves increases, causing them to gradually sink into a suspended state within the liquid. This continues until the effective components of the astragalus and tea leaves are extracted. The remaining components, mainly cellulose and lignin, will settle at the bottom of the tank.

[0003] Existing tea fermentation equipment typically prepares Astragalus compound tea by mixing tea components (including tea base and additives) with water in a specific ratio in a tank for fermentation. Once the active ingredients in the tea components have been extracted, the entire compound tea must be removed and filtered to obtain the finished product. This method limits the amount of compound tea that can be produced per batch, making continuous processing difficult. Furthermore, during fermentation, the tea liquid needs constant stirring, causing extracted and unextracted components to mix. Initially, the Astragalus (lumps) and tea leaves (flakes) float on the surface due to their dryness and low density. Even with stirring, it's difficult for all materials to fully contact the water—especially inside the Astragalus lumps and in the gaps formed by stacked tea leaves, where liquid penetration is slow, leading to "localized unextracted" components. Simultaneously, as fermentation progresses, the tea components absorb water and swell, softening. The shear force generated by stirring can cause some components to break and clump together, further hindering liquid penetration. Ultimately, this results in significant differences in the extraction rate of active ingredients within the same batch, with some components being over-extracted and others under-extracted.

[0004] In view of this, we propose an Astragalus compound tea fermentation device and fermentation method to improve the shortcomings of the existing technology. Summary of the Invention

[0005] One of the objectives of this invention is to provide a fermentation device for Astragalus compound tea, in which the tea components soften after absorbing water and swelling. The shear force generated by stirring may cause some tea components to break and clump together, further hindering liquid penetration and ultimately leading to a large difference in the extraction rate of effective components within the same batch of tea.

[0006] To achieve the above objectives, the Astragalus compound tea fermentation device includes a tea fermentation tank for preparing Astragalus compound tea, and a separation tank for adding tea components and water is provided at the axis of the tea fermentation tank. The separation tank rotates around the axis and is located below the liquid surface inside the tea fermentation tank. A separation component is provided inside the separation tank.

[0007] The separation groups, from highest to lowest, include:

[0008] The floating area, with a rectangular cross-section, provides buffer space for newly added tea components;

[0009] The transition zone has an inverted cone-shaped longitudinal section, with its top connected to the bottom of the floating zone. The slope is used to increase the adhesion of the tea components and prevent tea components with incomplete extraction of active ingredients from sliding down. The centrifugal force of the rotating separation tank is used to throw out the active ingredients in the tea components radially along the separation tank.

[0010] The finishing zone is equipped with a screening device for separating the extracted active ingredients from the incompletely extracted active ingredients, so that the finishing zone and the transition zone are intermittently connected. The bottom of the finishing zone is connected to a cleanup component.

[0011] The impurity removal component provides negative pressure at the bottom of the finishing zone, allowing the tea components with fully extracted active ingredients to pass over the sieve due to their own gravity. Meanwhile, tea components with incomplete extraction of active ingredients remain in the transition zone under the influence of buoyancy and the adhesion force of the inclined surface. Solid-liquid separation is completed during the process of the tea components with fully extracted active ingredients being extracted from the tea fermentation tank by the impurity removal component. The rate at which water is added to the tea fermentation tank is equal to the rate at which the compound tea product is produced from the tea fermentation tank.

[0012] The tea components include a tea base and additives. The tea base is green tea, and the additive is astragalus.

[0013] In the above technical solution, the sidewalls of the floating zone and the transition zone are provided with multiple separation holes along the radial direction of the separation tank, and the inclined surface of the sidewall of the transition zone is provided with a waterproof friction coating to provide adhesion to prevent tea components from slipping off.

[0014] The rotation of the separation tank is driven by a stirring assembly, which includes an upper connecting pipe fixedly connected to the top of the separation tank. The top of the upper connecting pipe is connected to the bottom of the raw material inlet, and the bottom of the upper connecting pipe is connected to the top of the separation tank.

[0015] In another technical solution, the stirring assembly includes multiple stirring blades and a pair of pulleys. The multiple stirring blades are arranged in a ring array around the periphery of the separation tank. One of the pulleys is integrally set around the upper connecting pipe, and the other pulley is driven by a motor. Both pulleys are surrounded by a belt.

[0016] Based on the above scheme, the screening component includes a partition integrally disposed on the inner wall of the finishing area. The partition has multiple impurity removal channels, and each impurity removal channel is rotatably connected to a hinged plate, which can open and close downwards.

[0017] Limiting grooves are provided at both ends of the hinge of the loose-leaf plate, and a coil spring is provided in each limiting groove. The inner ring of the coil spring is fixedly connected to the hinge of the loose-leaf plate, and the outer ring of the coil spring is fixedly connected to the inner wall of the limiting groove. In the initial state, the loose-leaf plate seals the impurity removal channel to prevent tea components that have not fully extracted effective ingredients from passing through the impurity removal channel.

[0018] In the above scheme, the impurity removal component includes a lower connecting pipe fixedly connected to the bottom of the separation tank. The top of the lower connecting pipe is connected to the bottom of the completion area, and the bottom of the lower connecting pipe is rotatably connected to the fixed support. The side wall of the lower connecting pipe is provided with a plurality of impurity removal holes. A limiting ring is rotatably connected to the side wall of the lower connecting pipe around the impurity removal holes. An extraction pipe is connected to one side of the limiting ring. The extraction pipe is connected to the inside of the lower connecting pipe through one of the impurity removal holes.

[0019] The extraction tube is connected to a filter element at one end away from the limiting ring. The filter element is horizontally arranged. The end of the filter element away from the lower connecting tube is connected to an extraction pump. The extraction pump is used to extract the tea components from the completed area after the effective ingredients have been extracted. The filter element is used to separate the water contained in the tea components.

[0020] The filter element includes a filter tube with multiple filter holes at the bottom. Each filter hole is equipped with a one-way valve. The one-way valve is used to discharge liquid components into the tea liquid in the tea fermentation tank and to prevent solid components from entering the tea liquid. The filter element also prevents the tea liquid in the tea fermentation tank from entering the filter tube.

[0021] The second objective of this invention is to provide a fermentation method for an Astragalus compound tea fermentation device, comprising the following steps:

[0022] S1. Add the tea components and water to the separation tank according to a certain ratio, so that the water in the tea fermentation tank submerges the separation tank;

[0023] S2. Start the stirring component to drive the separation tank to rotate, so that the effective components in the tea components are thrown into the tea liquid in the tea fermentation tank by centrifugal force, thereby accelerating the fermentation rate of the compound tea.

[0024] S3. Tea components whose effective components have not been fully extracted remain on the inclined surface in the transition zone, while tea components whose effective components have been fully extracted pass through the screening components and enter the completion zone under the action of the negative pressure extracted by the impurity removal component and their own gravity.

[0025] S4. The impurity removal component extracts the tea components after the effective ingredients have been extracted from the tea fermentation tank and completes solid-liquid separation during the extraction process, so that the original tea liquid remains inside the tea fermentation tank.

[0026] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows:

[0027] After the active ingredients in the tea component have been extracted, the remaining components are mainly cellulose and lignin. Upon absorbing water, their gravity increases, and combined with the suction effect of the extraction pump, the hinged plate rotates downwards, exposing a purification channel. This allows the tea component with extracted active ingredients to pass through the purification channel, while the tea component with incomplete extraction remains in the transition zone and does not pass through the purification channel into the completion zone. During this process, as the hinged plate rotates downwards, its shaft drives the coiling spring to tighten. After the tea component with extracted active ingredients passes through the purification channel and loses its gravitational pressure, the hinged plate returns to its original position under the restoring force of the coiling spring, thus resealing the purification channel, awaiting the return of any tea component with extracted active ingredients to the top of the hinged plate. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a perspective view of the overall structure of the present invention;

[0030] Figure 2 This is a partial cross-sectional perspective view of the present invention;

[0031] Figure 3 This is a partial sectional front view of the present invention;

[0032] Figure 4 This is a cross-sectional perspective view of the tea fermentation tank of the present invention;

[0033] Figure 5 This is a cross-sectional front view of the separation component of the present invention;

[0034] Figure 6 This is a cross-sectional perspective view of the stirring assembly of the present invention;

[0035] Figure 7 This is a three-dimensional structural view of the screening component of the present invention;

[0036] Figure 8 This is a cross-sectional top view of the screening component of the present invention;

[0037] Figure 9 This is a three-dimensional structural view of the impurity removal component of the present invention;

[0038] Figure 10 This is a cross-sectional front view of the impurity removal component of the present invention;

[0039] Figure 11 For the present invention Figure 10 Enlarged view of point A in the middle.

[0040] The meanings of the labels in the diagram are as follows:

[0041] 100. Tea fermentation tank; 110. Raw material inlet; 120. Separation tank; 130. Finished product outlet; 140. Fixed tray;

[0042] 200. Separation component; 210. Floating zone; 220. Transition zone; 230. Completion zone; 240. Separation hole; 250. Screening component; 251. Partition plate; 252. Impurity removal channel; 253. Hinged plate; 254. Limiting groove; 255. Coil spring;

[0043] 300. Stirring assembly; 310. Upper connecting pipe; 320. Stirring blade; 330. Pulley; 340. Belt;

[0044] 400, Impurity removal assembly; 410, Lower connecting pipe; 411, Impurity removal hole; 420, Limiting ring; 430, Extraction pipe; 440, Filter element; 441, Filter tube; 442, Filter hole; 443, One-way valve; 450, Extraction pump. Detailed Implementation

[0045] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1: The purpose of this example is to provide an Astragalus compound tea fermentation device, including a tea fermentation tank 100 for preparing Astragalus compound tea, a separation tank 120 for adding tea components and water is provided at the axis of the tea fermentation tank 100, the separation tank 120 rotates around the axis and is located below the liquid surface in the tea fermentation tank 100, and a separation component 200 is provided inside the separation tank 120.

[0047] The separation components 200, from highest to lowest, include:

[0048] Floating zone 210, with a rectangular cross-section, provides buffer space for newly added tea components;

[0049] The transition zone 220 has an inverted cone-shaped longitudinal section, and its top is connected to the bottom of the floating zone 210. The slope is used to increase the adhesion of the tea components and prevent the tea components with incomplete extraction of active ingredients from sliding down. The active ingredients in the tea components are thrown out radially along the separation tank 120 by the centrifugal force of the rotating separation tank 120.

[0050] The finishing zone 230 is equipped with a screening component 250 for separating the extracted active ingredients from the unextracted active ingredients, so that the finishing zone 230 is intermittently connected to the transition zone 220, and the bottom of the finishing zone 230 is connected to a cleanup component 400.

[0051] The impurity removal component 400 provides a negative pressure at the bottom of the finishing zone 230, allowing the tea component with extracted active ingredients to pass over the sieve 250 by its own gravity. Meanwhile, the tea component with incomplete extraction of active ingredients remains in the transition zone 220 under the action of buoyancy and the adhesion force of the inclined surface of the transition zone 220. The solid-liquid separation is completed during the process of the tea component with extracted active ingredients being extracted from the tea fermentation tank 100 by the impurity removal component 400. The rate at which water is added to the tea fermentation tank 100 is equal to the rate at which the tea fermentation tank 100 produces the compound tea product.

[0052] The tea components include a tea base and additives. In this embodiment, the tea base is green tea and the additive is astragalus.

[0053] like Figure 4 As shown, the top of the tea fermentation tank 100 is provided with a raw material inlet 110, which is connected to the separation tank 120. The bottom of the tea fermentation tank 100 is provided with a finished product outlet 130, and a fixed support 140 is fixedly connected above the finished product outlet 130. The separation tank 120 is rotatably connected to the fixed support 140.

[0054] Traditional compound tea fermentation equipment typically involves mixing tea components and water in a specific ratio and fermenting them in a tank. Once the active ingredients in the tea components have been extracted, the entire compound tea must be removed and filtered to obtain the finished product. This method limits the amount of compound tea that can be produced at one time, making continuous processing difficult.

[0055] In this embodiment, as the fermentation process proceeds, finished astragalus compound tea is continuously produced through the finished product outlet 130 at the bottom of the tea fermentation tank 100. Simultaneously, tea components and water, in the same initial ratio as the raw material inlet 110, are injected into the separation tank 120. Since the tea leaves and astragalus in the tea components have low water content, their addition to water has virtually no impact on the water volume compared to the amount of compound tea produced in industrial production. Therefore, as long as the rate of water addition through the raw material inlet 110 equals the rate of finished compound tea production through the finished product outlet 130, astragalus compound tea can be continuously produced without stopping the tea fermentation tank 100, thereby improving production efficiency.

[0056] exist Figure 5 In the middle, the sidewalls of the floating zone 210 and the transition zone 220 are provided with a plurality of separation holes 240 radially along the separation tank 120. The inclined sidewall of the transition zone 220 is provided with a waterproof friction coating to provide adhesion to prevent the tea components from slipping off.

[0057] It should be noted that when the tea components are added to the separator 120, initially, due to the low water content and low density of the astragalus and tea leaves, they float in the upper floating zone 210. As water gradually seeps into the astragalus and tea leaves, their weight increases, causing them to gradually sink within the separator 120 and eventually descend into the transition zone 220. Once in the transition zone 220, the astragalus and tea leaves are blocked by the inclined surface, and buoyancy prevents them from continuing to slide down. Furthermore, the active ingredients in the astragalus and tea leaves are flung into the water by the centrifugal force of the separator 120. These active ingredients then pass through the separation holes 240 and participate in the microbial fermentation of the tea liquid in the tea fermentation tank 100, thus obtaining the finished astragalus compound tea.

[0058] Next, through Figure 6 The drive structure of the separation tank 120 is disclosed. The rotation of the separation tank 120 is driven by the stirring assembly 300. The stirring assembly 300 includes an upper connecting pipe 310 fixedly connected to the top of the separation tank 120. The top of the upper connecting pipe 310 is connected to the bottom of the raw material inlet 110, and the bottom of the upper connecting pipe 310 is connected to the top of the separation tank 120.

[0059] Furthermore, the stirring assembly 300 includes multiple stirring blades 320 and a pair of pulleys 330. The multiple stirring blades 320 are arranged in a ring array around the separation tank 120. One pulley 330 is integrally disposed around the upper connecting pipe 310, and the other pulley 330 is driven by a motor. The two pulleys 330 are wrapped with a belt 340.

[0060] In other words, after the motor is powered on, the motor drives the first pulley 330, which is coaxially connected to its output shaft, to rotate. The pulley 330 transmits the rotational driving force to another pulley 330 through the belt 340. The second rotating pulley 330 then drives the separation tank 120 to rotate through the upper connecting pipe 310. Multiple stirring blades 320 located around the separation tank 120 agitate the tea liquid in the tea fermentation tank 100. At the same time, the rotating separation tank 120 uses centrifugal force to throw the effective components of astragalus and tea leaves into the tea liquid in the tea fermentation tank 100, thereby accelerating the fermentation process of the compound tea.

[0061] Based on the above explanation, the following will further combine... Figure 7 and Figure 8 To explain the preferred effect of the screening component 250, the screening component 250 includes a partition 251 integrally disposed on the inner wall of the finishing area 230. The partition 251 has multiple impurity removal channels 252, and each impurity removal channel 252 is rotatably connected to a hinge plate 253, which can open and close downward.

[0062] Furthermore, limiting grooves 254 are provided at both ends of the hinge of the loose-leaf plate 253, and each limiting groove 254 is provided with a coil spring 255. The inner ring of the coil spring 255 is fixedly connected to the hinge of the loose-leaf plate 253, and the outer ring of the coil spring 255 is fixedly connected to the inner wall of the limiting groove 254. In the initial state, the loose-leaf plate 253 seals the impurity removal channel 252 to prevent tea components that have not fully extracted effective ingredients from passing through the impurity removal channel 252.

[0063] During implementation, after the effective components in the tea component are extracted, the remaining part is mainly cellulose and lignin. After absorbing water, its gravity increases. Combined with the adsorption effect of the impurity removal component 400, the hinge plate 253 rotates downward to expose the impurity removal channel 252. This allows the tea component with extracted effective components to pass through the impurity removal channel 252, while the tea component with incomplete extraction remains in the transition zone 220 and will not pass through the impurity removal channel 252 to enter the completion zone 230. During the above process, when the hinge plate 253 rotates downward, its shaft drives the coil spring 255 to tighten. After the tea component with extracted effective components passes through the impurity removal channel 252 and loses its gravity, the hinge plate 253 returns to its original position under the restoring force of the coil spring 255, thereby resealing the impurity removal channel 252, waiting for the next tea component with extracted effective components to slide down to the top of the hinge plate 253.

[0064] like Figures 9-11 As shown, the impurity removal assembly 400 includes a lower connecting pipe 410 fixedly connected to the bottom of the separation tank 120. The top of the lower connecting pipe 410 is connected to the bottom of the completion area 230, and the bottom of the lower connecting pipe 410 is rotatably connected to the fixed support 140. A plurality of impurity removal holes 411 are circumferentially opened on the side wall of the lower connecting pipe 410. A limiting ring 420 is rotatably connected to the side wall of the lower connecting pipe 410 around the impurity removal holes 411. An extraction pipe 430 is connected to one side of the limiting ring 420. The extraction pipe 430 is connected to the interior of the lower connecting pipe 410 through one of the impurity removal holes 411.

[0065] Furthermore, the end of the extraction tube 430 away from the limiting ring 420 is connected to a filter element 440, which is horizontally set. The end of the filter element 440 away from the lower connecting tube 410 is connected to an extraction pump 450. The extraction pump 450 is used to extract the tea components from the completed area 230 after the effective ingredients have been extracted. The filter element 440 is used to separate the water contained in the tea components.

[0066] The filter element 440 includes a filter tube 441, with multiple filter holes 442 at the bottom of the filter tube 441. Each filter hole 442 is equipped with a one-way valve 443. The one-way valve 443 is used to discharge liquid components into the tea liquid in the tea fermentation tank 100 and to prevent solid components from entering the tea liquid. The one-way valve 443 also prevents the tea liquid in the tea fermentation tank 100 from entering the filter tube 441.

[0067] During operation, after the extraction pump 450 is started, the negative pressure generated by it draws the extracted tea components, which have been used to extract the active ingredients, into the extraction tube 430. The extracted tea components, along with the liquid, are then drawn upwards. After passing through the filter tube 441, most of the liquid components pass through the filter holes 442 into the tea liquid in the tea fermentation tank 100, while the solid components continue to be drawn upwards. As a result, the cellulose and lignin in the tea components are discharged from the tea fermentation tank 100.

[0068] Example 2: This example, based on the content provided in Example 1, aims to provide a fermentation method for an Astragalus compound tea fermentation device. The specific steps are as follows:

[0069] S1. Add the tea components and water to the separation tank 120 according to a certain ratio, so that the water in the tea fermentation tank 100 submerges the separation tank 120.

[0070] S2. Start the stirring component 300 to drive the separation tank 120 to rotate, so that the effective components in the tea components are thrown into the tea liquid in the tea fermentation tank 100 by centrifugal force, thereby accelerating the fermentation rate of the compound tea.

[0071] S3. Tea components whose effective components have not been fully extracted remain on the inclined surface in the transition zone 220, while tea components whose effective components have been fully extracted pass through the sieve 250 and enter the completion zone 230 under the action of the negative pressure extracted by the impurity removal component 400 and their own gravity.

[0072] S4. The impurity removal component 400 extracts the tea components after the effective ingredients have been extracted from the tea fermentation tank 100 and completes solid-liquid separation during the extraction process, so that the original tea liquid remains inside the tea fermentation tank 100.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fermentation device for Astragalus compound tea, comprising a tea fermentation tank (100), wherein a separation tank (120) is provided at the axis of the tea fermentation tank (100), the separation tank (120) rotates around the axis and is located below the liquid surface inside the tea fermentation tank (100), and a separation component (200) is provided inside the separation tank (120), characterized in that: The separation components (200) include, from highest to lowest, the following: The floating area (210), with a rectangular cross-section, provides buffer space for newly added tea components; The transition zone (220) has an inverted cone-shaped longitudinal section and a slope to increase the adhesion of the tea components. The effective components in the tea components are thrown out radially by the centrifugal force of the rotating separation tank (120). The finishing zone (230) is equipped with a screening component (250) to intermittently connect the finishing zone (230) with the transition zone (220). The bottom of the finishing zone (230) is connected to a cleaning component (400). The impurity removal component (400) is used to provide extraction negative pressure at the bottom of the completion zone (230). The tea component after the effective ingredients have been extracted passes over the sieve (250) by its own gravity. During the process of the tea component after the effective ingredients have been extracted out of the tea fermentation tank (100) by the impurity removal component (400), solid-liquid separation is completed. The rate at which water is added to the tea fermentation tank (100) is equal to the rate at which the tea fermentation tank (100) produces the compound tea product.

2. The Astragalus compound tea fermentation device according to claim 1, characterized in that: The tea fermentation tank (100) has a raw material inlet (110) at the top, which is connected to the separation tank (120). The tea fermentation tank (100) has a finished product outlet (130) at the bottom, and a fixed support (140) is fixedly connected above the finished product outlet (130). The separation tank (120) is rotatably connected to the fixed support (140).

3. The Astragalus compound tea fermentation device according to claim 1, characterized in that: The floating zone (210) and the transition zone (220) have multiple separation holes (240) radially opened on the sidewalls along the separation tank (120). The slope of the sidewall of the transition zone (220) is provided with a waterproof friction coating to provide adhesion to prevent the tea components from slipping.

4. The Astragalus compound tea fermentation device according to claim 1, characterized in that: The rotation of the separation tank (120) is driven by a stirring assembly (300), which includes an upper connecting pipe (310) fixedly connected to the top of the separation tank (120). The top of the upper connecting pipe (310) is connected to the bottom of the raw material inlet (110), and the bottom of the upper connecting pipe (310) is connected to the top of the separation tank (120).

5. The Astragalus compound tea fermentation device according to claim 4, characterized in that: The stirring assembly (300) includes multiple stirring blades (320) and a pair of pulleys (330). The multiple stirring blades (320) are arranged in a ring array around the separation tank (120). One of the pulleys (330) is integrally disposed around the upper connecting pipe (310), and the other pulley (330) is driven by a motor. The two pulleys (330) are wrapped with belts (340).

6. The Astragalus compound tea fermentation device according to claim 1, characterized in that: The screening component (250) includes a partition (251) integrally disposed on the inner wall of the finishing area (230). The partition (251) has multiple impurity removal channels (252), and each impurity removal channel (252) is rotatably connected to a hinged plate (253), which can open and close downward.

7. The Astragalus compound tea fermentation device according to claim 6, characterized in that: The hinge plate (253) has limiting grooves (254) at both ends of its rotating shaft. Each limiting groove (254) is provided with a coil spring (255). The inner ring of the coil spring (255) is fixedly connected to the rotating shaft of the hinge plate (253), and the outer ring of the coil spring (255) is fixedly connected to the inner wall of the limiting groove (254). In the initial state, the hinge plate (253) seals the impurity removal channel (252) to prevent tea components that have not fully extracted effective ingredients from passing through the impurity removal channel (252).

8. The Astragalus compound tea fermentation device according to claim 1, characterized in that: The impurity removal assembly (400) includes a lower connecting pipe (410) fixedly connected to the bottom of the separation tank (120). The top of the lower connecting pipe (410) is connected to the bottom of the completion area (230), and the bottom of the lower connecting pipe (410) is rotatably connected to the fixed support (140). The side wall of the lower connecting pipe (410) is provided with a plurality of impurity removal holes (411) circumferentially. The side wall of the lower connecting pipe (410) is rotatably connected to a limiting ring (420) around the impurity removal holes (411). One side of the limiting ring (420) is connected to an extraction pipe (430), and the extraction pipe (430) is connected to the inside of the lower connecting pipe (410) through one of the impurity removal holes (411).

9. The Astragalus compound tea fermentation device according to claim 8, characterized in that: The extraction tube (430) is connected to a filter element (440) at one end away from the limiting ring (420). The filter element (440) is horizontally arranged. The filter element (440) is connected to an extraction pump (450) at one end away from the lower connecting tube (410). The extraction pump (450) is used to extract the tea components from the completed area (230) after the effective ingredients have been extracted. The filter element (440) is used to separate the water contained in the tea components. The filter element (440) includes a filter tube (441), and the bottom of the filter tube (441) is provided with a plurality of filter holes (442). Each filter hole (442) is provided with a one-way valve (443). The one-way valve (443) is used to discharge liquid components into the tea liquid in the tea fermentation tank (100) and to prevent solid components from entering the tea liquid. The one-way valve (443) also prevents the tea liquid in the tea fermentation tank (100) from entering the filter tube (441).

10. A fermentation method for the Astragalus compound tea fermentation apparatus as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. Add the tea components and water into the separator (120) according to a certain ratio, so that the water in the tea fermentation tank (100) submerges the separator (120); S2. Start the stirring assembly (300) to drive the separation tank (120) to rotate, so that the effective components in the tea components are thrown into the tea liquid in the tea fermentation tank (100) by centrifugal force, thereby accelerating the fermentation rate of the compound tea. S3. Tea components that have not fully extracted their active ingredients remain on the inclined surface in the transition zone (220), while tea components that have fully extracted their active ingredients pass through the sieve (250) and enter the completion zone (230) under the action of the negative pressure extracted by the impurity removal component (400) and their own gravity. S4. The impurity removal component (400) extracts the tea components after the effective ingredients have been extracted from the tea fermentation tank (100) and completes solid-liquid separation during the extraction process, so that the original tea liquid remains inside the tea fermentation tank (100).

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