Method for preparing high-aroma natural tea essence from fresh tea leaves

Abstract

The invention discloses a method for preparing high-aroma natural tea essence from fresh tea leaves, and relates to the technical field of natural perfume preparation. The method for preparing the high-aroma natural tea essence by using the fresh tea leaves comprises four steps. According to the method for preparing the high-aroma natural tea essence from the fresh tea leaves, a device used in the second step is provided with a sealed circulating system, the whole crushing process is carried out in an inert gas environment, oxidation is prevented, and aroma dissipation is reduced; a cyclic crushing function is provided, the material separation assembly can separate qualified and unqualified materials in real time, the unqualified materials automatically return to the crushing system, uniform granularity is ensured, and the extraction efficiency is improved; the constant-temperature sleeve clamp is arranged and provides a constant-temperature condition for the reaction process, so that the damage of heat-sensitive components is avoided; and the condenser is arranged, aroma components volatilized in the crushing process are condensed and recovered, and meanwhile, the temperature of inert gas can be reduced, so that the crushing temperature is controlled, and heat-sensitive components are prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of natural fragrance preparation, and specifically to a method for preparing high-aroma natural tea essence using fresh tea leaves. Background Art

[0002] At present, the preparation methods of natural tea essence mainly use dry tea leaves as raw materials and extract them through traditional processes such as solvent extraction and distillation. However, these methods have the following problems: Some aroma components have been lost during the processing and storage of dry tea leaves, resulting in the aroma of the essence not being pure and full enough; Traditional extraction processes may introduce organic solvent residues, which do not meet the safety requirements of high-end food additives; The high temperature generated during the pulverization process is likely to cause the decomposition or volatilization loss of heat-sensitive aroma components. Therefore, it is of great significance to develop a preparation method that can retain the natural aroma components of fresh tea leaves to the greatest extent.

[0003] The present invention also provides a tea pulverizing device applicable to this method. Traditional tea pulverizing equipment is mainly used for the processing of dry tea leaves and cannot meet the pulverizing requirements of fresh leaves or frozen tea. The open pulverizing chamber causes a large amount of aroma components to volatilize during the pulverization process and is easily contaminated by the outside; Lack of an effective temperature control system, the frictional heat generated during pulverization will increase the temperature of the material and damage heat-sensitive aroma substances; Existing equipment is not equipped with an aroma condensation and recovery system, resulting in the direct emission of the volatilized aroma components during the pulverization process, causing waste of resources; The inert gas protection measures are imperfect, and the tea is easily oxidized during the pulverization process, affecting the quality of the essence.

[0004] The open pulverizing chamber easily causes a large amount of aroma components to volatilize, and the raw materials are easily contaminated by the outside; The temperature will rise during the pulverization process, causing a change in the properties of heat-sensitive aroma substances; Without a condensation and recovery system, it is easy to cause waste of volatile aroma components; The raw materials are easily oxidized during the pulverization process, affecting the quality of the essence. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a method for preparing high-aroma natural tea essence using fresh tea leaves, which solves the problems that the open pulverizing chamber easily causes a large amount of aroma components to volatilize, and the raw materials are easily contaminated by the outside; The temperature will rise during the pulverization process, causing a change in the properties of heat-sensitive aroma substances; Without a condensation and recovery system, it is easy to cause waste of volatile aroma components; The raw materials are easily oxidized during the pulverization process, affecting the quality of the essence.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for preparing high-aroma natural tea essence using fresh tea leaves, comprising the following steps:

[0007] Step 1: Pretreatment, fresh tea leaves, picking, withering, freezing;

[0008] Step 2: Titian, grind and pulverize, and carry out a constant-temperature reaction;

[0009] Step 3: Supercritical extraction, and the product obtained by extraction is centrifuged to obtain an aroma extract;

[0010] Step 4: Low-temperature vacuum extraction to obtain an aroma extract;

[0011] The second step needs to be realized by using a tea pulverizing device, which includes a material storage unit, a pulverizing unit, and a reaction unit. The material storage unit is located at the front end of the pulverizing unit, and the reaction unit is located at the rear end of the pulverizing unit. The pulverizing unit includes:

[0012] A sealed box body, which provides a sealed condition for the pulverizing process;

[0013] A material distribution component, which is used to classify qualified and unqualified processing materials;

[0014] A feeding pump, which is connected to the inner side of the sealed box body. The feeding pump is connected with a feeding pipe, and the bottom of the feeding pipe is connected with a feeding tube and a return pipe. The return pipe is connected to the material distribution component and is used to recycle unqualified processing materials;

[0015] The reaction unit is provided with a condenser, which is used to condense and collect the aroma components volatilized during the pulverizing process.

[0016] Preferably, the material storage unit includes:

[0017] A frame body, which is connected to the outer side of the sealed box body;

[0018] A sealed cover, which is located at the top of the frame body. The sealed cover is provided with a feeding port cover plate and an air inlet pipe. The air inlet pipe is used to input inert gas, and the feeding port cover plate is hinged to the sealed cover.

[0019] Preferably, the material storage unit is provided with a stirring motor, which is located above the sealed cover. The output end of the stirring motor is connected with a shaft rod, and the shaft rod penetrates through the sealed cover and is connected with a stirring member.

[0020] Preferably, the material storage unit is provided with a storage bin, which is located inside the frame body and is clamped to the outside of the sealed cover. The outside of the storage bin is provided with support legs, the bottom of the storage bin is connected with a discharge port, and the inside of the storage bin is connected with a positioning member, and the positioning member is sleeved outside the shaft rod.

[0021] Preferably, a positioning plate is provided inside the sealed box body. The top of the sealed box body is connected to a crushing barrel. The top of the crushing barrel is connected to a feeding pipe, which is used to put the raw materials to be crushed into the inside of the crushing barrel. A crushing motor is provided at the top of the crushing barrel. The output end of the crushing motor is connected to a power shaft, which is inserted into the inside of the crushing barrel. The outside of the crushing barrel is sleeved with evenly distributed crushing knives. A limiting member is provided inside the crushing barrel. The bottom of the crushing barrel is connected to a feeding hopper, and the feeding hopper is inside the sealed box body.

[0022] Preferably, the material distribution assembly is provided with a suction pump and a material distribution box. The suction pump is connected to a conveying pipe, and the bottom of the conveying pipe is connected to a collecting pipe. The material distribution box is provided with a qualified compartment and a recycling compartment. The qualified compartment is communicated with the collecting pipe. A recycling port is provided outside the recycling compartment, and the recycling port is connected to a return pipe.

[0023] Preferably, the crushing unit is provided with a sieve barrel. A spiral plate is provided inside the sieve barrel. A transmission shaft is provided inside the spiral plate. One end of the transmission shaft is sleeved with a linkage belt pulley. A belt is sleeved outside the linkage belt pulley. A transmission belt pulley is inserted inside the belt, and the transmission belt pulley is sleeved outside the output end of the sieving motor. The sieving motor is inserted inside the positioning plate.

[0024] Preferably, the reaction unit is provided with a reaction barrel. A support plate is sleeved outside the reaction barrel, and the support plate is connected to the top of the sealed box body. An inlet is opened at one end of the reaction barrel, and the inlet is connected to the conveying pipe. An air outlet pipe is provided at the other end of the reaction barrel for discharging inert gas. A filter screen is provided inside the air outlet pipe. A rotating shaft is inserted inside the reaction barrel. Annularly and evenly distributed turning plates are provided outside the rotating shaft, and the side surfaces of the turning plates are in contact with but not touching the filter screen for cleaning the filter screen and turning the processing materials.

[0025] Preferably, a constant temperature jacket is sleeved outside the reaction barrel. An inlet and an outlet are provided outside the constant temperature jacket, and the constant temperature jacket is used to keep the reaction barrel at a constant temperature.

[0026] Preferably, the air outlet pipe is inserted outside the condenser, and the air outlet pipe is communicated with a liquid collecting tank. The air outlet pipe is communicated with an inlet pipe for recycling inert gas.

[0027] The present invention discloses a method for preparing high-aroma natural tea essence using fresh tea leaves, and the beneficial effects thereof are as follows:

[0028] 1. A sealed circulation system is provided, and the entire crushing process is carried out in an inert gas environment to prevent oxidation and reduce the escape of aroma.

[0029] 2. It is equipped with a cyclic pulverization function. The material distribution component can separate qualified and unqualified materials in real time, and the unqualified materials will automatically return to the pulverization system to ensure uniform particle size and improve the extraction efficiency.

[0030] 3. It is equipped with a constant temperature jacket clamp, which provides a constant temperature condition for the reaction process to avoid damage to heat-sensitive components.

[0031] 4. It is equipped with a condenser, which recovers the volatile aroma components during the pulverization process through condensation, and at the same time can reduce the temperature of the inert gas, so as to control the pulverization temperature and avoid damage to heat-sensitive components. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the storage unit of the present invention;

[0035] Figure 3 It is a schematic sectional view of the storage unit of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the pulverization unit of the present invention;

[0037] Figure 5 It is a schematic sectional view of the pulverization unit of the present invention;

[0038] Figure 6 It is a schematic diagram of the rear side structure of the pulverization unit of the present invention;

[0039] Figure 7 It is a schematic diagram of the structure of the material distribution component of the present invention;

[0040] Figure 8 It is a schematic diagram of the structure of the sieve tube of the present invention;

[0041] Figure 9 It is a schematic diagram of the structure of the reaction unit of the present invention;

[0042] Figure 10 It is a schematic diagram of the rear side structure of the reaction unit of the present invention;

[0043] Figure 11 It is a schematic sectional view of the reaction unit of the present invention.

[0044] In the figure: 1. Storage unit; 11. Frame; 12. Sealing cover; 121. Feed port cover plate; 122. Inlet pipe; 13. Stirring motor; 131. Shaft rod; 132. Stirring member; 14. Storage bin; 141. Support leg; 142. Discharge port; 143. Positioning member;

[0045] 2. Crushing unit; 21. Sealed box body; 211. Positioning plate; 22. Crushing barrel; 221. Crushing motor; 222. Power shaft; 223. Crushing knife; 224. Limiting member; 225. Discharge hopper; 23. Material distribution assembly; 231. Suction pump; 2311. Delivery pipe; 2312. Collection pipe; 232. Material distribution box; 2321. Qualified compartment; 2322. Recycling compartment; 2323. Recovery port; 24. Screening cylinder; 241. Spiral plate; 242. Transmission shaft; 243. Linkage pulley; 244. Belt; 245. Driving pulley; 246. Screening motor; 25. Feeding pump; 251. Feed pipe; 252. Return pipe; 253. Feeding pipe.

[0046] 3. Reaction unit; 31. Reaction barrel; 311. Support plate; 312. Feed port; 313. Outlet pipe; 3131. Filter screen; 314. Rotating shaft; 315. Turning plate; 32. Constant temperature jacket; 321. Water inlet; 322. Water outlet; 33. Condenser; 331. Liquid collection tank. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] By providing a method for preparing high-aroma natural tea essence using fresh tea leaves in the embodiments of the present application, the problems that an open crushing cavity easily causes a large amount of aroma components to volatilize and the raw materials are easily contaminated by the outside world; the temperature will rise during the crushing process, causing the properties of heat-sensitive aroma substances to change; there is no condensation recovery system, which easily causes waste of volatile aroma components; and the raw materials are easily oxidized during the crushing process, affecting the quality of the essence are solved, and the natural aroma components of fresh tea leaves are retained to the greatest extent.

[0049] The embodiments of the present invention disclose a method for preparing high-aroma natural tea essence using fresh tea leaves.

[0050] Embodiment 1

[0051] According to the attached Figures 1-11As shown in the figure, it includes the following steps: Step 1: Pretreatment, fresh tea leaves are picked, withered, and frozen; Step 2: Aroma enhancement, ground and pulverized, with a constant temperature reaction; Step 3: Supercritical extraction, the product obtained by extraction is centrifuged to obtain an aroma extraction liquid; Step 4: Low-temperature vacuum extraction to obtain an aroma extraction liquid. Step 2 needs to be implemented using a tea leaf pulverizing device, which includes a storage unit 1, a pulverizing unit 2, and a reaction unit 3. The storage unit 1 is located at the front end of the pulverizing unit 2, and the reaction unit 3 is located at the rear end of the pulverizing unit 2. The pulverizing unit 2 includes a sealed box body 21, a material sorting component 23, and a feeding pump 25. The sealed box body 21 provides a sealed condition for the pulverizing process; the material sorting component 23 is used to classify qualified and unqualified processing materials; the feeding pump 25 is connected to the inside of the sealed box body 21. The feeding pump 25 is connected with a feeding pipe 253, and the bottom of the feeding pipe 253 is connected with a feed inlet pipe 251 and a return pipe 252. The return pipe 252 is connected to the material sorting component 23 and is used to recycle unqualified processing materials; the reaction unit 3 is provided with a condenser 33, and the condenser 33 is used to condense and collect the aroma components volatilized during the pulverizing process.

[0052] A sealed circulation system is provided, and the entire pulverizing process is carried out in an inert gas environment to prevent oxidation and reduce the escape of aroma; a circulating pulverizing function is provided. The material sorting component 23 can separate qualified and unqualified materials in real time, and the unqualified materials automatically return to the pulverizing system to ensure uniform particle size and improve the extraction efficiency; a constant temperature jacket 32 is provided, and the constant temperature jacket 32 provides a constant temperature condition for the reaction process to avoid the destruction of heat-sensitive components; a condenser 33 is provided, which recovers the aroma components volatilized during the pulverizing process by condensation, and at the same time can reduce the temperature of the inert gas, so as to control the pulverizing temperature and avoid the destruction of heat-sensitive components.

[0053] Furthermore, the storage unit 1 includes a frame body 11 and a sealing cover 12. The frame body 11 is connected to the outside of the sealed box body 21; the sealing cover 12 is located on the top of the frame body 11. The sealing cover 12 is provided with a feed inlet cover plate 121 and an inlet pipe 122. The inlet pipe 122 is used to input inert gas, and the feed inlet cover plate 121 is hinged to the sealing cover 12.

[0054] Furthermore, the storage unit 1 is provided with a stirring motor 13. The stirring motor 13 is located above the sealing cover 12. The output end of the stirring motor 13 is connected with a shaft rod 131. The shaft rod 131 passes through the sealing cover 12 and is connected with a stirring member 132. The stirring member 132 stirs the tea leaves to ensure uniform materials.

[0055] Furthermore, the storage unit 1 is provided with a storage bin 14. The storage bin 14 is located inside the frame body 11 and is clamped outside the sealing cover 12. The outside of the storage bin 14 is provided with support legs 141. The bottom of the storage bin 14 is connected with a discharge port 142. The inside of the storage bin 14 is connected with a positioning member 143. The positioning member 143 is sleeved outside the shaft rod 131.

[0056] Specifically disclosed, a positioning plate 211 is arranged inside the sealed box body 21. The top of the sealed box body 21 is connected with a crushing barrel 22. The top of the crushing barrel 22 is connected with a feeding pipe 253, and the feeding pipe 253 is used to input the raw materials to be crushed into the inside of the crushing barrel 22. A crushing motor 221 is arranged on the top of the crushing barrel 22. The output end of the crushing motor 221 is connected with a power shaft 222. The power shaft 222 is inserted into the inside of the crushing barrel 22. The outside of the crushing barrel 22 is sleeved with evenly distributed crushing knives 223. A limiting part 224 is arranged inside the crushing barrel 22. The bottom of the crushing barrel 22 is connected with a feed hopper 225, and the feed hopper 225 is inside the sealed box body 21.

[0057] Specifically disclosed, the material distribution assembly 23 is provided with a suction pump 231 and a material distribution box 232. The suction pump 231 is connected with a conveying pipe 2311. The bottom of the conveying pipe 2311 is connected with a collecting pipe 2312. The material distribution box 232 is provided with a qualified compartment 2321 and a circulation compartment 2322. The qualified compartment 2321 is communicated with the collecting pipe 2312. A recycling port 2323 is arranged outside the circulation compartment 2322, and the recycling port 2323 is connected with a return pipe 252.

[0058] Specifically disclosed, the crushing unit 2 is provided with a screening cylinder 24. A spiral plate 241 is arranged inside the screening cylinder 24. A transmission shaft 242 is arranged inside the spiral plate 241. One end of the transmission shaft 242 is sleeved with a linkage pulley 243. The outside of the linkage pulley 243 is sleeved with a belt 244. The inside of the belt 244 is inserted with a driving pulley 245, and the driving pulley 245 is sleeved on the outside of the output end of a screening motor 246. The screening motor 246 is inserted into the inside of the positioning plate 211. The crushed material falls into the screening cylinder 24 through the feed hopper 225. The screening motor 246 drives the spiral plate 241 to rotate through the belt 244, so that the material moves inside the screening cylinder 24.

[0059] It needs to be emphasized specifically that the reaction unit 3 is provided with a reaction barrel 31. The outside of the reaction barrel 31 is sleeved with a support plate 311, and the support plate 311 is connected to the top of the sealed box body 21. One end of the reaction barrel 31 is provided with a feed inlet 312, and the feed inlet 312 is connected with the conveying pipe 2311. The other end of the reaction barrel 31 is provided with an air outlet pipe 313 for discharging inert gas. A filter screen 3131 is arranged inside the air outlet pipe 313. A rotating shaft 314 is inserted into the inside of the reaction barrel 31. The outside of the rotating shaft 314 is provided with annularly and evenly distributed turning plates 315. The side surface of the turning plate 315 is in contact with but not touching the filter screen 3131, which is used to clean the filter screen 3131 and turn the processing material. Circulating hot water is introduced into the constant temperature jacket 32 through the water inlet 321 and the water outlet 322 to keep the reaction temperature at a set value.

[0060] It should be emphasized that a constant-temperature jacket 32 is sleeved outside the reaction barrel 31. An inlet 321 and an outlet 322 are arranged on the outside of the constant-temperature jacket 32. The constant-temperature jacket 32 is used to keep the reaction barrel 31 at a constant temperature.

[0061] Example Two

[0062] According to the appendix Figures 1-11 As shown, it includes the following steps: Step 1: Pretreatment, fresh tea leaves, picked, withered, and frozen; Step 2: Aroma enhancement, ground and pulverized, with a constant-temperature reaction; Step 3: Supercritical extraction, the product obtained by extraction is centrifuged to obtain an aroma extraction solution; Step 4: Low-temperature vacuum extraction to obtain an aroma extraction solution. Step 2 needs to be realized by using a tea pulverizing device, which includes a storage unit 1, a pulverizing unit 2, and a reaction unit 3. The storage unit 1 is located at the front end of the pulverizing unit 2, and the reaction unit 3 is located at the rear end of the pulverizing unit 2. The pulverizing unit 2 includes a sealed box body 21, a material sorting component 23, and a feeding pump 25. The sealed box body 21 provides a sealed condition for the pulverizing process; the material sorting component 23 is used to classify qualified and unqualified processing materials; the feeding pump 25 is connected inside the sealed box body 21. The feeding pump 25 is connected with a feeding pipe 253. The bottom of the feeding pipe 253 is connected with a feed pipe 251 and a return pipe 252. The return pipe 252 is connected to the material sorting component 23 and is used to recycle unqualified processing materials; the reaction unit 3 is provided with a condenser 33, and the condenser 33 is used to condense and collect the volatile aroma components during the pulverizing process.

[0063] It should be emphasized that the air outlet pipe 313 is inserted outside the condenser 33, and the air outlet pipe 313 is connected to the liquid collection tank 331 and is also connected to the air inlet pipe 122. It is used to recycle inert gas. After the inert gas condenses and collects the volatile aroma components through the condenser 33, the temperature of the inert gas decreases. The low-temperature inert gas is recycled, which can effectively reduce the temperature inside the pulverizing device.

[0064] Working principle:

[0065] Material transportation: The frozen tea leaves are transported from the storage unit 1 to the pulverizing unit 2 through the feeding pump 25. After pulverization, they are screened by the material sorting component 23. Qualified materials enter the reaction unit 3, and unqualified materials are recycled for pulverization;

[0066] Inert gas protection: The storage unit 1 and the reaction unit 3 form an inert gas such as nitrogen circulation system through the air inlet pipe 122 and the air outlet pipe 313 to prevent the oxidation of tea leaves;

[0067] Aroma recovery: The volatile aroma components during pulverization and reaction are condensed and collected by the condenser 33 and returned to the system or stored separately;

[0068] Low-temperature environment; while condensing and recovering the aroma components, the temperature of the inert gas is reduced, and the low-temperature inert gas is recycled to keep the pulverization process carried out at a low temperature, reducing the loss of heat-sensitive aroma components.

[0069] The above shows and describes 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 by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing high-aroma natural tea essence using fresh tea leaves, characterized in that, It includes the following steps: Step 1: Pretreatment, the fresh tea leaves are picked, withered, and frozen. Step 2: Aroma enhancement, using a tea leaf crushing device for grinding and crushing, and carrying out a constant-temperature reaction. Step 3: Supercritical extraction, the product obtained by extraction is centrifuged to obtain an aroma extraction solution. Step 4: Low-temperature vacuum extraction to obtain an aroma extraction solution. The tea leaf crushing device includes a storage unit (1), a crushing unit (2), and a reaction unit (3). The storage unit (1) is located at the front end of the crushing unit (2), and the reaction unit (3) is located at the rear end of the crushing unit (2). The crushing unit (2) includes: A sealed box body (21), which provides a sealed condition for the crushing process. A material distribution component (23), which is used to classify qualified and unqualified processing materials. A feeding pump (25), which is connected to the inside of the sealed box body (21). The feeding pump (25) is connected with a feeding pipe (253). The bottom of the feeding pipe (253) is connected with a feed inlet pipe (251) and a return pipe (252). The return pipe (252) is connected to the material distribution component (23) and is used to recycle unqualified processing materials. The reaction unit (3) is provided with a condenser (33), which is used to condense and collect the aroma components volatilized during the crushing process.

2. The method for preparing a high-aroma natural tea essence using fresh tea leaves according to claim 1, characterized in that, The storage unit (1) includes: A frame body (11), which is connected to the outside of the sealed box body (21). A sealed cover (12), which is located at the top of the frame body (11). An inlet cover plate (121) and an inlet gas pipe (122) are provided on the sealed cover (12). The inlet gas pipe (122) is used to input inert gas, and the inlet cover plate (121) is hinged to the sealed cover (12).

3. The method for preparing a high-aroma natural tea essence using fresh tea leaves according to claim 2, characterized in that, The storage unit (1) is provided with a stirring motor (13), which is located above the sealed cover (12). The output end of the stirring motor (13) is connected with a shaft rod (131). The shaft rod (131) penetrates through the sealed cover (12) and is connected with a stirring member (132).

4. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 3, characterized in that, The storage unit (1) is provided with a storage bin (14), which is located inside the frame body (11) and is clamped outside the sealed cover (12). Support legs (141) are provided on the outside of the storage bin (14). The bottom of the storage bin (14) is connected with a discharge port (142). A positioning member (143) is connected to the inside of the storage bin (14), and the positioning member (143) is sleeved outside the shaft rod (131).

5. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 1, characterized in that, Inside the sealed box body (21), a positioning plate (211) is provided. The top of the sealed box body (21) is connected to a crushing barrel (22). The top of the crushing barrel (22) is connected to a feeding pipe (253). The feeding pipe (253) is used to put the raw material to be crushed into the inside of the crushing barrel (22). A crushing motor (221) is provided at the top of the crushing barrel (22). The output end of the crushing motor (221) is connected to a power shaft (222). The power shaft (222) is inserted into the inside of the crushing barrel (22). Uniformly distributed crushing knives (223) are sleeved outside the crushing barrel (22). A limiting member (224) is provided inside the crushing barrel (22). The bottom of the crushing barrel (22) is connected to a feeding hopper (225). The feeding hopper (225) is inside the sealed box body (21).

6. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 1, characterized in that, The material distribution assembly (23) is provided with a suction pump (231) and a material distribution box (232). The suction pump (231) is connected to a delivery pipe (2311). The bottom of the delivery pipe (2311) is connected to a collection pipe (2312). The material distribution box (232) is provided with a qualified compartment (2321) and a recycling compartment (2322). The qualified compartment (2321) is communicated with the collection pipe (2312). A recycling port (2323) is provided outside the recycling compartment (2322). The recycling port (2323) is connected to a return pipe (252).

7. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 3, characterized in that, The crushing unit (2) is provided with a sieve barrel (24). A spiral plate (241) is provided inside the sieve barrel (24). A transmission shaft (242) is provided inside the spiral plate (241). One end of the transmission shaft (242) is sleeved with a linkage pulley (243). A belt (244) is sleeved outside the linkage pulley (243). A transmission pulley (245) is inserted inside the belt (244). The transmission pulley (245) is sleeved outside the output end of a sieving motor (246). The sieving motor (246) is inserted inside the positioning plate (211).

8. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 1, characterized in that, The reaction unit (3) is provided with a reaction barrel (31). A support plate (311) is sleeved outside the reaction barrel (31). The support plate (311) is connected to the top of the sealed box body (21). A feed inlet (312) is opened at one end of the reaction barrel (31). The feed inlet (312) is connected to the delivery pipe (2311). An air outlet pipe (313) is provided at the other end of the reaction barrel (31) for discharging inert gas. A filter screen (3131) is provided inside the air outlet pipe (313). A rotating shaft (314) is inserted inside the reaction barrel (31). Uniformly distributed turning plates (315) are provided in a ring shape outside the rotating shaft (314). The side surface of the turning plate (315) is in contact with but not touching the filter screen (3131) for cleaning the filter screen (3131) and turning the processing material.

9. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 8, characterized in that, A thermostatic jacket (32) is sleeved outside the reaction barrel (31). An inlet (321) and an outlet (322) are arranged outside the thermostatic jacket (32). The thermostatic jacket (32) is used to keep the reaction barrel (31) at a constant temperature.

10. A method for preparing high-aroma natural tea essence using fresh tea leaves according to claim 8, characterized in that The outlet pipe (313) is inserted outside the condenser (33), and the outlet pipe (313) is communicated with the liquid collection tank (331). The outlet pipe (313) is communicated with the inlet pipe (122) for recycling the inert gas.

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