Black tea exogenous enzyme addition fermentation device

Abstract

This invention discloses a black tea exogenous enzyme addition fermentation device, belonging to the field of fermentation device technology. The black tea exogenous enzyme addition fermentation device includes a lower support; a black tea fermentation structure installed on top of the lower support; a kneading jar installed at the input end of the black tea fermentation structure by screws; and an integrated kneading and fermentation structure installed inside the black tea fermentation structure and extending into the kneading jar. The integrated kneading and fermentation structure includes: a gear drive assembly installed on top of the lower support and located on the side of the black tea fermentation structure; and a stirring fermentation assembly connected to the gear drive assembly and extending into the black tea fermentation structure. In this invention, the exogenous enzyme entering the fermentation tank can be fully mixed with the black tea raw material, effectively increasing the contact area between the two. During the fermentation reaction, this significantly promotes the conversion of tea polyphenols, thereby reducing the bitterness of the tea soup, enhancing the freshness of the taste, and ensuring the quality of the fermented black tea.

Description

Technical Field

[0001] This invention relates to the field of fermentation equipment technology, specifically to a fermentation device for adding exogenous enzymes to black tea. Background Technology

[0002] Traditional black tea fermentation primarily relies on the reaction of endogenous enzymes (mainly polyphenol oxidase) released after the tea leaves rupture with oxygen, oxidizing tea polyphenols to produce key coloring and flavor compounds such as theaflavins and thearubigins. In contrast, the method of adding exogenous enzymes involves artificially introducing external enzyme preparations during processes such as rolling to enhance or replace some of the role of endogenous enzymes, achieving precise control over the fermentation process and improving the efficiency and effectiveness of black tea fermentation.

[0003] Existing methods for adding exogenous enzymes typically involve evenly spraying extracted natural enzyme solutions onto the surface of tea leaves (e.g., polyphenol oxidase and peroxidase extracted from mulberry leaves). This exogenous enzymes reduce the caffeine content of the finished tea (potentially below 1%) and impart a unique sweet floral and fruity aroma. However, when adding exogenous enzymes into the interior of black tea leaves, the leaf-like shape of the leaves makes it difficult for the stacked enzymes to effectively penetrate the cells. This results in slow and incomplete enzymatic oxidation, leading to insufficient production of theaflavins and thearubigins in the black tea leaves. Furthermore, it can easily cause incomplete fermentation and loose leaf shape, affecting the characteristic "red liquor and red leaves" quality of black tea. Summary of the Invention

[0004] The purpose of this invention is to provide a fermentation device for adding exogenous enzymes to black tea, so as to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] This invention provides a black tea exogenous enzyme addition fermentation device, comprising: a lower support; a black tea fermentation structure installed on top of the lower support; a kneading jar installed at the input end of the black tea fermentation structure by screws; and an integrated kneading and fermentation structure installed inside the black tea fermentation structure and extending into the kneading jar.

[0007] The integrated kneading and fermentation structure includes: a gear drive assembly installed on the top of the lower support and located on the side of the black tea fermentation structure; a stirring and fermentation assembly connected to the gear drive assembly and extending into the interior of the black tea fermentation structure; and a transmission kneading assembly connected to the gear drive assembly and extending into the interior of the kneading tank.

[0008] The black tea fermentation structure is connected to the exogenous enzyme tank via a flexible tube.

[0009] As a preferred embodiment of the present invention, the black tea fermentation structure includes:

[0010] An outer protective frame is installed on the top of the lower support by screws. A fermentation tank is installed and positioned inside the outer protective frame. A feed pipe is installed on one side of the fermentation tank by screws.

[0011] An emptying pipe is installed on the other side of the fermentation tank by screws. The fermentation tank, the feed pipe and the emptying pipe are equipped with a stirring fermentation assembly that extends to the outside.

[0012] In a preferred embodiment of the present invention, a kneading tank is mounted on the top of the feed pipe by screws. The kneading tank is mounted on the top of the lower support by an externally mounted bracket. One side of the feed pipe is connected to an exogenous enzyme tank via a flexible hose, and the exogenous enzyme tank transports the enzyme source for fermentation to the interior of the fermentation tank.

[0013] The vent of the vent pipe is oriented downwards, and a gear drive assembly is provided on the side of the feed pipe.

[0014] As a preferred embodiment of the present invention, the gear drive assembly includes:

[0015] The lower base is mounted on the top of the lower support by screws. The lower base is located on the side of the feed pipe, and a linear drive source is installed on one side of the lower base.

[0016] A linear shaft is connected to the output end of the linear drive source. The linear shaft is rotatably connected inside the lower base, and a stirring and fermentation assembly is installed at the bottom of the linear shaft.

[0017] A first bevel gear is mounted on the outside of the linear shaft and is rotatably connected to one side of the inner wall of the lower base. A second bevel gear is meshed with one side of the top of the first bevel gear and is rotatably connected to the inside of the lower base.

[0018] As a preferred embodiment of the present invention, a vertical shaft is mounted on the top of the second bevel gear, the vertical shaft is rotatably connected to the interior of the lower base, and a transmission kneading assembly extending into the interior of the kneading tank is mounted on the outer side of the top of the vertical shaft.

[0019] As a preferred embodiment of the present invention, the stirred fermentation assembly includes:

[0020] A feeding screw is connected to the linear shaft and is movably disposed inside the feed pipe. A stirring screw is installed at the bottom of the feeding screw and is movably disposed inside the fermentation tank.

[0021] There are two feeding screws, and the other feeding screw is movably disposed inside the venting pipe.

[0022] As a preferred embodiment of the present invention, the transmission kneading assembly includes:

[0023] A timing belt, connected to the outer side of the top of the vertical shaft via an inner timing pulley, extends into the interior of the kneading tank. An intermediate shaft is connected to the inner side of the timing belt via a timing pulley.

[0024] The intermediate shaft is rotatably connected to the inside of the upper frame, which is installed at the top inside the kneading tank.

[0025] A conical insert is installed inside the kneading tank, and an intermediate shaft is installed inside the conical insert. A discharge channel is provided between the conical insert and the kneading tank.

[0026] The upper cover is installed at the bottom of the conical insert, and an inlet is provided at the eccentric part of the upper cover, which is connected to the unloading channel.

[0027] In a preferred embodiment of the present invention, a kneading turntable is mounted on the outer side of the intermediate shaft, the kneading turntable is rotatably connected to the bottom of the upper cover, and a kneading base plate installed inside the kneading tank is provided at the bottom of the kneading turntable.

[0028] The kneading base has a side flow groove extending to the bottom inside, and multiple kneading protrusions are installed at the biased part of the inside of the kneading base.

[0029] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0030] 1. In the exogenous enzyme fermentation device for black tea, when black tea raw materials and exogenous enzymes are stirred and fermented, the volume of the black tea raw materials entering the fermentation tank can be reduced by pre-kneading the raw materials. This allows the exogenous enzymes to be fully mixed with the black tea raw materials, effectively increasing the contact area between the two. This ensures that the stirring and fermentation reaction of the black tea raw materials and exogenous enzymes can significantly promote the conversion of tea polyphenols and reduce the phenol-to-amino acid ratio (the ratio of tea polyphenols to amino acids), thereby reducing the bitterness of the tea soup and enhancing its freshness. Simultaneously, during the kneading operation of the black tea raw materials, the intermediate shaft (operated by rotation) drives the kneading turntable to rotate, and simultaneously rotates the conical insert mounted on its outer side. This pushes the black tea raw materials being unloaded and conveyed inside the unloading channel outside the conical insert, preventing the unloaded black tea raw materials from clogging the unloading channel.

[0031] It should be noted that exogenous enzymes can effectively reduce the total amount of catechins and the content of ester-type catechins, while increasing the content of beneficial components such as theaflavins and thearubigins, making the tea soup brighter and the taste more mellow.

[0032] 2. In the exogenous enzyme addition fermentation device for black tea, the driving force for kneading the raw black tea and the driving force for stirring and fermenting the materials inside the fermentation tank are both synchronously driven by a linear drive source. This results in lower vibration during the fermentation process and greater stability. Simultaneously, the driving force for stirring the fermented black tea also moves the black tea materials in the feed and discharge pipes (via the rotation of the screw), integrating the kneading, feeding, fermentation stirring, and unloading of the raw black tea, thus improving the efficiency and intelligence of the black tea fermentation process.

[0033] 3. In the exogenous enzyme addition fermentation device for black tea, when the black tea raw material is rotated and kneaded, by setting multiple kneading protrusions on the top of the supporting black tea raw material, the contact area and roughness of the kneading turntable when rotating and kneading the black tea raw material at the bottom can be increased, ensuring that the black tea raw material is kneaded more thoroughly and the kneading time is shorter. Attached Figure Description

[0034] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a side view of the overall structure of the present invention;

[0038] Figure 3 This is a schematic cross-sectional view of the entire structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the overall side section of the present invention;

[0040] Figure 5 This is a cross-sectional structural diagram showing the connection between the lower support and the black tea fermentation structure of the present invention;

[0041] Figure 6 This is the present invention. Figure 5 Enlarged structural diagram of region A in the middle;

[0042] Figure 7 This is a cross-sectional view of the connection between the kneading tank and the integrated kneading and fermentation structure of the present invention;

[0043] Figure 8 This is a cross-sectional structural schematic diagram of the connection between the transmission and kneading assembly and the second bevel gear of the present invention;

[0044] Figure 9 This is an exploded view of the connection between the intermediate shaft and the kneading base of the present invention;

[0045] In the picture:

[0046] 10. Lower support;

[0047] 20. Black tea fermentation structure; 200. Flexible hose; 201. Outer protective frame; 202. Fermentation tank; 203. Feeding pipe; 204. Drainage pipe;

[0048] 30. Kneading pot; 300. Support frame;

[0049] 40. Integrated kneading and fermentation structure; 401. Gear drive assembly; 402. Stirring and fermentation assembly; 403. Transmission kneading assembly;

[0050] 4011, Lower base; 4012, Linear drive source; 4013, Linear shaft; 4014, First bevel gear; 4015, Second bevel gear; 40151, Vertical shaft;

[0051] 4021. Feeding screw; 4022. Mixing screw;

[0052] 4031. Synchronous belt; 4032. Intermediate shaft; 40321. Twisting turntable; 40322. Twisting base; 40323. Side flow channel; 40324. Twisting protrusion; 4033. Upper frame; 4034. Conical insert; 4035. Unloading channel; 4036. Upper cover; 4037. Inlet. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0054] Please see Figures 1-9 A black tea exogenous enzyme addition fermentation device includes a lower support 10; a black tea fermentation structure 20 installed on the top of the lower support 10; a kneading tank 30 installed at the input end of the black tea fermentation structure 20 by screws; and an integrated kneading fermentation structure 40 installed inside the black tea fermentation structure 20 and extending into the kneading tank 30. The integrated kneading fermentation structure 40 includes: a gear drive assembly 401 installed on the top of the lower support 10 and located on the side of the black tea fermentation structure 20; a stirring fermentation assembly 402 connected to the gear drive assembly 401 and extending into the black tea fermentation structure 20; and a transmission kneading assembly 403 connected to the gear drive assembly 401 and extending into the kneading tank 30. The black tea fermentation structure 20 is connected to the exogenous enzyme tank via a hose 200.

[0055] It should be noted that the black tea fermentation structure 20 includes an outer protective frame 201, which is installed on the top of the lower support 10 by screws. A fermentation tank 202 is installed and positioned inside the outer protective frame 201. A feed pipe 203 is installed on one side of the fermentation tank 202 by screws. An empty pipe 204 is installed on the other side of the fermentation tank 202 by screws. A stirring fermentation component 402 extending to the outside is installed inside the fermentation tank 202, the feed pipe 203, and the empty pipe 204.

[0056] The working principle described above is as follows: When preparing black tea through fermentation, the raw black tea is first poured into the kneading tank 30, and the gear drive assembly 401 is simultaneously activated. This drives the transmission kneading assembly 403 connected to the gear drive assembly 401 to automatically knead the raw black tea inside the kneading tank 30, reducing the volume of the raw black tea. This allows for more thorough contact and fermentation between the raw black tea and the exogenous enzymes, significantly promoting the conversion of tea polyphenols and reducing the phenol-to-amino acid ratio (the ratio of tea polyphenols to amino acids). This reduces the bitterness of the tea soup and enhances its freshness. Simultaneously, the gear drive assembly 401 also drives the stirring fermentation assembly 402. This facilitates the transfer of raw materials and exogenous enzymes from the feed pipe 203 to the fermentation tank 202, and the discharge of the fermented products from the exhaust pipe 204. Furthermore, it automatically stirs the materials inside the fermentation tank 202, improving the efficiency and effectiveness of the fermentation process.

[0057] It should be noted that the lower support 10 can be configured to be raised and lowered on both sides and tilted as a whole.

[0058] For details, please refer to the following: Figure 4 and Figure 5 A kneading tank 30 is installed on the top of the feed pipe 203 by screws. The kneading tank 30 is installed on the top of the lower support 10 by the support body 300 installed on the outside. One side of the feed pipe 203 is connected to the exogenous enzyme tank through the hose 200, and the enzyme source for fermentation is transferred to the inside of the fermentation tank 202 through the exogenous enzyme tank. The vent of the drain pipe 204 is set downward. A gear drive assembly 401 is provided on the side of the feed pipe 203.

[0059] For details, please refer to the following: Figure 5 , Figure 6 and Figure 7 The gear drive assembly 401 includes a lower base 4011, which is mounted on the top of the lower bracket 10 by screws. The lower base 4011 is located on the side of the feed pipe 203, and a linear drive source 4012 is mounted on one side of the lower base 4011. A linear shaft 4013 is connected to the output end of the linear drive source 4012 and is rotatably connected inside the lower base 4011. A stirring and fermentation assembly 402 is mounted at the bottom of the linear shaft 4013. A first bevel gear 4014 is mounted on the outside of the linear shaft 4013 and is rotatably connected to one side of the inner wall of the lower base 4011. A second bevel gear 4015 is meshed on one side of the top of the first bevel gear 4014 and is rotatably connected inside the lower base 4011.

[0060] In this design, a vertical shaft 40151 is mounted on the top of the second bevel gear 4015. The vertical shaft 40151 is rotatably connected to the inside of the lower base 4011. A transmission kneading assembly 403 extending into the kneading tank 30 is mounted on the outer side of the top of the vertical shaft 40151.

[0061] In the exogenous enzyme addition fermentation device for black tea of ​​the present invention, when stirring, fermentation and kneading are performed, the linear drive source 4012 is activated, driving the linear shaft 4013 connected to the output end of the linear drive source 4012 to rotate, and driving the first bevel gear 4014 mounted on the outer side of the linear shaft 4013 to rotate. When the first bevel gear 4014 rotates, the second bevel gear 4015 meshing with its top side will rotate, driving the vertical shaft 40151 connected to the second bevel gear 4015 to rotate.

[0062] For details, please refer to the following: Figure 7 The stirring fermentation assembly 402 includes a feeding screw 4021, which is connected to a linear shaft 4013. The feeding screw 4021 is movably disposed inside the feed pipe 203. A stirring screw 4022 is installed at the bottom of the feeding screw 4021 and is movably disposed inside the fermentation tank 202. There are two feeding screws 4021, and another feeding screw 4021 is movably disposed inside the drain pipe 204.

[0063] In the exogenous enzyme addition fermentation device for black tea of ​​the present invention, when the linear shaft 4013 rotates, the feeding screw 4021 and stirring screw 4022 mounted on its side will also rotate. At this time, the feeding screw 4021 located inside the feed pipe 203 can easily transport the black tea raw material to the inside of the fermentation tank 202, and the feeding screw 4021 located inside the drain pipe 204 can easily discharge the fermented black tea material. The stirring screw 4022 located inside the fermentation tank 202 can stir the black tea raw material and exogenous enzymes and other enzymes inside the fermentation tank 202, thereby improving the efficiency and effect of fermentation.

[0064] For details, please refer to the following: Figure 7 , Figure 8 and Figure 9The transmission kneading assembly 403 includes a synchronous belt 4031, which is connected to the outer side of the top of the vertical shaft 40151 via an inner synchronous pulley. The synchronous belt 4031 extends into the interior of the kneading jar 30. An intermediate shaft 4032 is connected to the inner side of the synchronous belt 4031 via a synchronous pulley. The intermediate shaft 4032 is rotatably connected to the interior of the upper frame 4033, which is installed at the inner top of the kneading jar 30. A conical embedded... Body 4034, a conical insert 4034 is installed inside the kneading tank 30, an intermediate shaft 4032 is installed inside the conical insert 4034, and a discharge channel 4035 is provided between the conical insert 4034 and the kneading tank 30; upper cover 4036, the upper cover 4036 is installed at the bottom of the conical insert 4034, and an inlet 4037 is provided at the eccentric part inside the upper cover 4036, the inlet 4037 is connected to the discharge channel 4035.

[0065] In the exogenous enzyme addition fermentation device for black tea of ​​the present invention, when the vertical shaft 40151 rotates, the synchronous belt 4031 connected to its top outer side via a synchronous pulley will operate, driving the intermediate shaft 4032 connected to the inner side of the synchronous belt 4031 via a synchronous pulley to rotate. The black tea raw material entering the kneading tank 30 can enter the upper cover 4036 through the unloading channel 4035, and enter the bottom of the conical insert 4034 through the inlet 4037 opened inside the upper cover 4036.

[0066] It should be noted that when the intermediate shaft 4032 rotates, it will drive the conical insert 4034 to rotate. The force generated by the rotation will prevent the black tea raw material from being blocked inside the unloading channel 4035.

[0067] For details, please refer to the following: Figure 8 and Figure 9 A kneading turntable 40321 is installed on the outer side of the intermediate shaft 4032. The kneading turntable 40321 is rotatably connected to the bottom of the upper cover 4036. A kneading base plate 40322 is installed at the bottom of the kneading turntable 40321 inside the kneading tank 30. The kneading base plate 40322 has a side flow groove 40323 extending to the bottom inside. Multiple kneading protrusions 40324 are installed at the biased part inside the kneading base plate 40322.

[0068] In the exogenous enzyme addition fermentation device for black tea of ​​the present invention, when the intermediate shaft 4032 rotates, it drives the kneading turntable 40321 to rotate, automatically kneading the black tea raw material that is transported to the top of the kneading base 40322 through the inlet 4037. The black tea raw material enters the top of the kneading base 40322 through a through-hole inside the kneading base 40322. After kneading, the black tea raw material enters the interior of the side flow channel 40323 through the centrifugal force generated by the rotation of the kneading turntable 40321, realizing the automatic unloading operation of the kneaded black tea raw material.

[0069] It should be noted that the design of the kneading protrusion 40324 increases the contact area and roughness of the black tea raw material at the bottom of the kneading turntable 40321 during kneading, thereby improving the effect of kneading the black tea.

[0070] 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.

[0071] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0072] Therefore, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the protection scope of this invention.

Claims

1. A device for adding exogenous enzymes to black tea fermentation, characterized in that, include: The lower support (10); the black tea fermentation structure (20) installed on the top of the lower support (10); the kneading jar (30) installed by screws at the input end of the black tea fermentation structure (20); and the integrated kneading and fermentation structure (40) installed inside the black tea fermentation structure (20) and extending into the kneading jar (30). The integrated kneading and fermentation structure (40) includes: a gear drive assembly (401) installed on the top of the lower support (10) and located on the side of the black tea fermentation structure (20); a stirring fermentation assembly (402) connected to the gear drive assembly (401) and extending into the interior of the black tea fermentation structure (20); and a transmission kneading assembly (403) connected to the gear drive assembly (401) and extending into the interior of the kneading tank (30). The black tea fermentation structure (20) is connected to the exogenous enzyme tank via a flexible tube (200).

2. The exogenous enzyme addition fermentation device for black tea according to claim 1, characterized in that: The fermentation structure (20) of the black tea includes: An outer protective frame (201) is installed on the top of the lower support (10) by screws. A fermentation tank (202) is installed and positioned inside the outer protective frame (201). A feed pipe (203) is installed on one side of the fermentation tank (202) by screws. An empty pipe (204) is installed on the other side of the fermentation tank (202) by screws. Inside the fermentation tank (202), the feed pipe (203) and the empty pipe (204) are stirred fermentation components (402) extending to the outside.

3. The exogenous enzyme addition fermentation device for black tea according to claim 2, characterized in that: A kneading tank (30) is screwed onto the top of the feed pipe (203). The kneading tank (30) is mounted on the top of the lower support (10) via an externally mounted bracket (300). One side of the feed pipe (203) is connected to the exogenous enzyme tank via a flexible hose (200), and the exogenous enzyme tank transports the enzyme source for fermentation to the interior of the fermentation tank (202). The vent of the vent pipe (204) is oriented downwards, and a gear drive assembly (401) is provided on the side of the feed pipe (203).

4. The exogenous enzyme addition fermentation device for black tea according to claim 3, characterized in that: The gear drive assembly (401) includes: The lower base (4011) is mounted on the top of the lower bracket (10) by screws. The lower base (4011) is located on the side of the feed pipe (203). A linear drive source (4012) is installed on one side of the lower base (4011). A linear shaft (4013) is connected to the output end of the linear drive source (4012). The linear shaft (4013) is rotatably connected inside the lower base (4011). A stirring fermentation assembly (402) is installed at the bottom of the linear shaft (4013). A first bevel gear (4014) is mounted on the outside of the linear shaft (4013). The first bevel gear (4014) is rotatably connected to one side of the inner wall of the lower base (4011). A second bevel gear (4015) is meshed on one side of the top of the first bevel gear (4014). The second bevel gear (4015) is rotatably connected to the inside of the lower base (4011).

5. The exogenous enzyme addition fermentation device for black tea according to claim 4, characterized in that: A vertical shaft (40151) is mounted on the top of the second bevel gear (4015), the vertical shaft (40151) is rotatably connected to the interior of the lower base (4011), and a transmission kneading assembly (403) extending into the kneading tank (30) is mounted on the outer side of the top of the vertical shaft (40151).

6. The exogenous enzyme addition fermentation device for black tea according to claim 4, characterized in that: The stirred fermentation assembly (402) includes: A feeding screw (4021) is connected to the linear shaft (4013). The feeding screw (4021) is movably disposed inside the feed pipe (203). A stirring screw (4022) is installed at the bottom of the feeding screw (4021). The stirring screw (4022) is movably disposed inside the fermentation tank (202). There are two feeding screws (4021), and the other feeding screw (4021) is movably disposed inside the drain pipe (204).

7. The exogenous enzyme addition fermentation device for black tea according to claim 5, characterized in that: The transmission kneading assembly (403) includes: Synchronous belt (4031) is connected to the outer side of the top of the vertical shaft (40151) via an inner synchronous pulley. The synchronous belt (4031) extends into the interior of the kneading tank (30). An intermediate shaft (4032) is connected to the inner side of the synchronous belt (4031) via a synchronous pulley. The intermediate shaft (4032) is rotatably connected to the inside of the upper frame (4033), which is installed on the inner top of the kneading tank (30). A conical insert (4034) is installed inside the kneading tank (30), and an intermediate shaft (4032) is installed inside the conical insert (4034). A discharge channel (4035) is provided between the conical insert (4034) and the kneading tank (30). The upper cover (4036) is installed at the bottom of the conical insert (4034). An inlet (4037) is provided at the eccentric part of the upper cover (4036), and the inlet (4037) is connected to the unloading channel (4035).

8. The exogenous enzyme addition fermentation device for black tea according to claim 7, characterized in that: A kneading turntable (40321) is installed on the outside of the intermediate shaft (4032). The kneading turntable (40321) is rotatably connected to the bottom of the upper cover (4036). A kneading base plate (40322) installed inside the kneading tank (30) is provided at the bottom of the kneading turntable (40321). The kneading base (40322) has a side flow groove (40323) extending to the bottom inside, and a plurality of kneading protrusions (40324) are installed at the biased part inside the kneading base (40322).

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