Tea scenting method and device

Abstract

The invention discloses a tea scenting method and device, and belongs to the technical field of tea leaf processing. The method comprises the following steps: respectively placing spices and tea leaves in a spice storage box and a tea leaf storage box, and transmitting the fragrance through a gas medium; compressed gas is introduced into a perfume storage box, fragrance release is promoted, and the fragrance concentration is monitored and controlled through a VOCs concentration detector; conveying the aroma reaching the standard to a tea storage box, so that the tea adsorbs the aroma; and finishing scenting after preset scenting times. The device comprises a perfume storage box and a tea leaf storage box which are communicated through a transmission pipeline, wherein the perfume storage box is connected with a connecting pipe for introducing compressed gas; the tea storage box is connected with the refrigeration equipment, an ultrasonic humidifier, a temperature and humidity sensor and a VOCs concentration detector are arranged in the tea storage box, and the back face is connected with a vacuum pump. The separation link after traditional scenting is avoided, precise control over the whole scenting process is achieved, and efficiency and quality are improved.

Description

Technical Field

[0001] This invention belongs to the field of tea processing technology, specifically relating to a method and apparatus for scenting tea. Background Technology

[0002] Scenting tea is a key process that imparts floral aroma to tea leaves, enhancing their quality and value. Its basic principle lies in utilizing the porous nature of tea leaves to absorb the aromatic components released by fresh flowers.

[0003] Currently, the mainstream scenting methods mostly employ the "layering method" or "piling method," which involves directly mixing tea leaves with fresh flowers (such as jasmine and magnolia) in a specific ratio and then stacking them for storage. Under specific temperature and humidity conditions, the flowers continuously release their fragrance, which the tea leaves then absorb. After the scenting process is complete, the wilted flower residue must be separated from the tea leaves through processes such as sieving and winnowing. This results in a complex process, low production efficiency, and difficulty in meeting the demands of modern continuous production.

[0004] Furthermore, during the mixing and separation process, tea leaves are easily broken due to compression and friction, affecting the integrity of the finished product and the purity of the tea soup. At the same time, the aroma volatilization and adsorption process under the mixed scenting method is highly random, with uneven local concentrations, which can easily lead to problems such as low aroma utilization and unstable adsorption effect. Moreover, the entire scenting environment lacks effective monitoring and control methods and relies too much on human experience, which further restricts the uniformity and controllability of product quality. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention presents a method and apparatus for scenting tea, which uses a gaseous medium to transfer aroma, fundamentally avoiding the separation of scented tea after scenting, and achieving precise and intelligent control over the entire scenting process.

[0006] The tea scenting method of the present invention includes the following steps: S1. Loading and spreading: Place the spices in the spice storage box, put the tea into the placement board of the tea storage box and spread it evenly. S2. Environmental preset: Compressed gas is introduced into the spice storage box. Depending on the type of spice, the ultrasonic or microwave heating module is activated. The target heating parameters are set, and the aroma concentration is monitored by the VOCs concentration detector in the spice storage box. The aroma is dynamically controlled within the preset concentration range. The target temperature and humidity in the tea storage box are set simultaneously through the cooling device and the ultrasonic humidifier. S3. Aroma Delivery and Adsorption: When the aroma concentration reaches the set value, the aroma is delivered to the tea storage box so that the tea can absorb the aroma. S4: Status monitoring: By monitoring the changes in VOCs concentration in the tea storage box and combining it with the preset number of scenting cycles, the scenting process is determined to be over when the concentration tends to stabilize and the preset number of scenting cycles is reached.

[0007] The aroma concentration in S2 is dynamically controlled within 10–20 mg / m³.

[0008] The tea scenting device of the present invention for implementing the above method includes a spice storage box and a tea storage box, which are connected by a transmission pipeline; the transmission pipeline is provided with a first shut-off valve at the air inlet end and a first one-way valve at the air outlet end. The spice storage box is equipped with an ultrasonic heating module and a microwave heating module. A VOCs concentration detector and a first pressure relief valve are installed at the top, and a connecting pipe for compressed gas is connected to the bottom. A second one-way valve and a second shut-off valve are installed on the connecting pipe from the gas outlet end in sequence. The tea storage box is connected to a refrigeration device, which is equipped with an ultrasonic humidifier, a temperature and humidity sensor, and a VOCs concentration detector. A vacuum pump is connected to the back, and a door is provided on one side of the tea storage box.

[0009] The refrigeration equipment is a split-type mechanical compression refrigeration system, including a refrigeration compressor and condenser located outside the tea storage box, and an evaporator located inside the tea storage box. The evaporator is connected to the refrigeration compressor and condenser through refrigeration pipes to form a refrigeration loop. The tea storage box is also equipped with a circulating fan.

[0010] The tea storage box has a placement plate inside to hold tea leaves. A spreading mechanism is set above the placement plate, and a vibration mechanism is set below it. The spreading mechanism includes a reciprocating screw and a guide rod set inside the tea storage box. A moving plate is connected to the screw and the guide rod. A connecting column is connected to the moving plate through a first spring. The spreading plate is fixed at the bottom of the connecting column. The bottom of the spreading plate is rake-shaped. One end of the screw passes through the tea storage box and is connected to the drive mechanism.

[0011] Two vertical plates are fixedly connected to the upper surface of the spreading plate. A first wedge block and a third wedge block are fixedly connected to the side of the two vertical plates that are far apart from each other. A second wedge block corresponding to the first wedge block is fixedly connected to the door of the box. A fourth wedge block corresponding to the third wedge block is fixedly connected to the inside of the tea storage box.

[0012] The vibration mechanism includes a square plate fixed to the inner wall of the tea storage box, and the square plate is connected to the placement plate by a second spring; it also includes a cam driven by a transmission shaft located below the placement plate, and the transmission shaft passes through the tea storage box and is connected to the drive mechanism.

[0013] The drive mechanism includes a motor installed outside the tea storage box. The motor drives the drive shaft through a coupling. Two one-way bearings with opposite directions are installed on the drive shaft, and a synchronous pulley is installed on each one-way bearing. Power is transmitted to the reciprocating screw and the synchronous pulley of the drive shaft through a synchronous belt drive.

[0014] The spice storage box has a pull-out storage box with a hollow bottom. The box wall of the spice storage box is connected to a support plate for supporting the storage box. The contact area between the storage box and the box wall of the spice storage box is provided with a rubber layer.

[0015] The outlet of the vacuum pump is also connected to the gas collection box via an exhaust pipe. The gas collection box is equipped with a gas delivery pipe that connects to the spice storage box. The gas collection box is also equipped with a second pressure relief valve, and the gas delivery pipe is equipped with a third shut-off valve and a third check valve.

[0016] The tea storage box has multiple layers of placement plates arranged parallel to each other in the vertical direction. Each layer of placement plate is equipped with a spreading mechanism and a vibration mechanism. All reciprocating screws are interconnected by synchronous pulleys and synchronous belts, and all drive shafts are also linked by synchronous pulleys and synchronous belts.

[0017] The top of the tea storage box is equipped with a centralized hopper, which is connected to a guide tube via a guide hose. The guide tube is fixed on a moving plate driven by a reciprocating screw. The bottom of the guide tube is slidably connected to a fixed plate fixed inside the box. The fixed plate is equipped with a number of feed pipes that are the same as the number of layers of the storage plate.

[0018] The transmission pipeline is connected to a four-way fitting before entering the tea storage box, and its multiple outlets are connected to the various layers of space inside the box through pipelines; the vacuum pump inlet is also connected to the various layers of space inside the box through a four-way fitting, and the outlet is collected into the gas collection box through pipelines.

[0019] Compared with the prior art, the beneficial effects of the present invention are: (1) By transferring aroma through a gaseous medium, the cumbersome process of separating flower tea after traditional scenting is fundamentally avoided, simplifying the process and improving production efficiency. At the same time, by using ultrasonic or microwave heating modules, VOCs concentration detectors and other components, precise dynamic control of aroma concentration, temperature and humidity is achieved. Combined with the comprehensive judgment of scenting times and concentration changes, the high utilization rate of aroma and stable and reliable adsorption effect are ensured, significantly improving the uniformity and controllability of product quality.

[0020] (2) The spreading mechanism uses a rake-shaped spreading plate driven by a reciprocating screw to evenly spread the tea leaves before and during the scenting process, avoiding local accumulation. The vibration mechanism uses a cam and spring system to generate high-frequency micro-vibration of the placement plate, which maintains the spread tea leaf layer during the adsorption stage and further achieves the ideal loose state. The two mechanisms work in tandem, solving the two key problems of spreading and loosening the tea leaves one after the other. This significantly increases the effective contact area between the tea leaves and the aroma airflow, avoids adsorption dead zones caused by static spreading, enhances the penetration depth of aroma molecules into the tea leaves, improves the uniformity and efficiency of adsorption, thereby shortening the scenting cycle and improving the aroma utilization rate.

[0021] (3) The drive mechanism uses a single motor in conjunction with a one-way bearing and synchronous belt drive in opposite directions. By switching the motor's forward and reverse rotation, the time-sharing linkage of the two functional modes of spreading and vibration is cleverly realized. This design can complete the two actions sequentially with only one power source. The mechanical structure is compact and the control logic is simple, effectively reducing equipment costs and energy consumption. This time-sharing drive mechanism ensures that both spreading and loosening processes can be carried out in the best condition, avoiding action interference and providing a reliable and efficient guarantee for efficient and uniform aroma adsorption. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments are briefly introduced below.

[0023] Figure 1 This is a schematic diagram of the overall front structure of the tea scenting device in the embodiment.

[0024] Figure 2 This is a schematic diagram of the overall rear structure of the tea scenting device in the embodiment.

[0025] Figure 3 This is a schematic diagram of the tea storage box structure in the embodiment.

[0026] Figure 4 This is a schematic cross-sectional view of the tea storage box in the embodiment.

[0027] Figure 5 This is a schematic diagram of the spreading plate structure in the embodiment.

[0028] Figure 6 This is a schematic diagram of the spreading plate and wedge block structure in the embodiment.

[0029] Figure 7 This is a schematic diagram of the storage box structure in the embodiment.

[0030] Figure 8 This is a schematic diagram of the multi-layer placement plate structure in the embodiment.

[0031] Figure 9 This is a schematic diagram of the drive mechanism structure in the embodiment.

[0032] In the attached diagram, the structural names represented by each number are as follows: 1-Spice storage box, 101-First pressure relief valve, 2-Tea storage box, 3-Transmission pipe, 301-First shut-off valve, 302-First check valve, 4-VOCs concentration detector, 5-Dustproof shell, 6-Door, 7-Connecting pipe, 701-Second shut-off valve, 702-Second check valve, 8-Storage box, 9-Support plate, 10-Split-type mechanical compression refrigeration system, 11-Ultrasonic humidifier, 12-Temperature and humidity sensor, 13-Evaporator, 14-Vacuum pump, 15-Gas collection box, 16-Four-way fitting, 17-Gas delivery pipe, 18-Second pressure relief valve, 19-Third shut-off valve 20-Third one-way valve, 21-Placement plate, 22-Reciprocating screw, 23-Guide rod, 24-Moving plate, 25-First spring, 26-Connecting column, 27-Spreading plate, 28-Upright plate, 29-First wedge block, 30-Second wedge block, 31-Third wedge block, 32-Fourth wedge block, 33-Square plate, 34-Second spring, 35-Drive shaft, 36-Cam, 37-Motor, 38-Drive shaft, 39-One-way bearing, 40-Synchronous pulley, 41-Synchronous belt, 42-Hopper, 43-Guide hose, 44-Guide tube, 45-Fixing plate, 46-Discharge tube. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example 1 This embodiment provides a method for scenting tea, specifically including the following steps: S1. Loading and spreading: Place jasmine flowers and other spices in the spice storage box 1, put tea leaves into the placement plate 21 of the tea storage box 2, and use the spreading mechanism to spread the tea leaves evenly to ensure that the surface of the tea leaves is flat and loose; then, start the vacuum pump 14 to evacuate the inside of the tea storage box 2 to create a vacuum environment. S2. Environmental Preset: After adding spices to the spice storage box 1, keep the first shut-off valve 301 on the transmission pipeline 3 closed and introduce compressed oxygen at a pressure of 1 MPa into the spice storage box 1; when the spice storage box 1 is full of compressed oxygen and the gas pressure is stable at 1 MPa, close the second shut-off valve 701 on the connecting pipe 7, and the first pressure relief valve 101 on the top of the spice storage box 1 ensures stable and safe gas pressure; select and start the ultrasonic heating module or microwave heating module according to the type of spice to promote aroma release; set the target heating parameters, use the VOCs concentration detector 4 in the spice storage box 1 to monitor the aroma concentration in real time, and dynamically control the aroma concentration within the range of 10-20 mg / m³; at the same time, set the target temperature and humidity in the tea storage box 2 through the cooling device and ultrasonic humidifier 11, preferably controlling the temperature at 20-30℃ and the humidity at 70-80%; S3. Aroma delivery and adsorption: When the aroma concentration reaches the set value, the first shut-off valve 301 on the transmission pipeline 3 is opened, and the aroma is delivered to the tea storage box 2 through the transmission pipeline 3, so that the tea can adsorb the aroma in a vacuum environment. S4. Status monitoring: The aroma concentration change is monitored by the VOCs concentration detector 4 in the tea storage box 2. When the concentration tends to stabilize and reaches the set value in combination with the preset number of scenting cycles (such as one scenting cycle or two scenting cycles), the scenting process is determined to be over.

[0035] This method uses gas to transfer aroma, avoiding the mixing of flower teas, simplifying post-processing steps, and improving the efficiency and quality of the scenting process through intelligent control.

[0036] Example 2 See Figures 1 to 8 As shown, in this embodiment, a tea scenting device for implementing the method of Embodiment 1 is provided, which is mainly composed of a spice storage box 1 and a tea storage box 2 connected by a transmission pipe 3.

[0037] The transmission pipeline 3 is equipped with a first shut-off valve 301 at the air inlet end and a first one-way valve 302 at the air outlet end, which are used to control the flow and direction of the aroma airflow.

[0038] Both the spice storage box 1 and the tea storage box 2 have doors 6 on the front for easy loading and unloading. Inside the spice storage box 1, an ultrasonic heating module and a microwave heating module are arranged side by side, allowing selection of the most suitable aroma release method according to the characteristics of different spices. The top of the box is equipped with a VOCs concentration detector 4 and a first pressure relief valve 101, used to monitor the aroma concentration inside the box and prevent excessive pressure, respectively. The bottom is connected to a connecting pipe 7 for introducing compressed gas. The inlet end of the connecting pipe 7 is connected to an oxygen source with a pressure of 1 MPa, and a second one-way valve 702 and a second shut-off valve 701 are sequentially installed on the connecting pipe 7 from the outlet end.

[0039] To further improve the efficiency of spice replacement, a storage box 8 with a hollow bottom is pulled out and connected inside the spice storage box 1. A support plate 9 for supporting the storage box 8 is connected to the box wall of the spice storage box 1. A rubber layer is provided at the contact part between the storage box 8 and the box wall of the spice storage box 1 to maintain airtightness, thereby realizing the rapid replacement of spices.

[0040] The tea storage box 2 forms an independent tea adsorption environment. Its back is connected to a split-type mechanical compression refrigeration system 10. The refrigeration compressor and condenser of the split-type mechanical compression refrigeration system 10 are located outside the tea storage box 2, and the evaporator 13 is located inside the tea storage box 2. The evaporator 13 is connected to the refrigeration compressor and condenser through refrigeration pipes to form a refrigeration loop. The tea storage box 2 is equipped with a circulating fan to promote the air flow inside the box through the evaporator 13. It also integrates an ultrasonic humidifier 11, a temperature and humidity sensor 12, and a VOCs concentration detector 4 to accurately control the adsorption environment and monitor the adsorption status.

[0041] A vacuum pump 14 is also connected to the back of the tea storage box 2 to remove air from the box to enhance aroma penetration or create conditions for aroma recycling. The outlet of the vacuum pump 14 is connected to the gas collection box 15 through an exhaust pipe; the gas collection box 15 is equipped with a gas delivery pipe 17 that is connected back to the spice storage box 1, which can reintroduce waste gas containing residual aroma into the system; a second pressure relief valve 18 is installed on the gas collection box 15 for safety, and a third shut-off valve 19 and a third one-way valve 20 are installed on the gas delivery pipe 17 to control the timing of the return flow and prevent gas backflow.

[0042] The tea storage box 2 has a single-layer placement plate 21 inside. A spreading mechanism is installed on the upper part of the placement plate 21, and a vibration mechanism is installed at the lower part. The spreading mechanism includes a reciprocating screw 22 and a guide rod 23 parallel to it. A moving plate 24 is sleeved on the reciprocating screw 22 and the guide rod 23. A connecting column 26 is connected below the moving plate 24 via a first spring 25. A spreading plate 27 with a rake-like bottom is fixed to the bottom of the column, used to evenly spread the tea leaves and prevent damage. Two upright plates 28 are fixedly connected to the upper surface of the spreading plate 27. A first wedge block 29 and a third wedge block 31 are fixedly connected to the opposite sides of the two upright plates 28, respectively. A second wedge block 30 corresponding to the first wedge block 29 is fixedly connected to the door 6. A fourth wedge block 32 corresponding to the third wedge block 31 is fixedly connected inside the tea storage box 2. Through the cooperation of the wedge blocks, the spreading plate 27 is prevented from pushing the tea leaves to the edge of the placement plate 21 and causing them to pile up, ensuring that the tea leaves are evenly spread.

[0043] The vibration mechanism includes a square plate 33 fixed inside the tea storage box 2, which is connected to the four lower corners of the placement plate 21 by a second spring 34; it also includes a cam 36 driven by a drive shaft 35 located below the placement plate 21, which periodically lifts the placement plate 21 and generates high-frequency vibration under the reset action of the second spring 34.

[0044] Both the reciprocating screw 22 and the drive shaft 35 are connected and driven by a drive mechanism. The drive mechanism consists of a motor 37 driving a drive shaft 38 via a coupling. Two one-way bearings 39 rotating in opposite directions are mounted on this shaft, each bearing housing a synchronous pulley 40. Power is transmitted to the reciprocating screw 22 and the synchronous pulleys 40 of the drive shaft 35 via a synchronous belt 41, achieving coordinated control of the reciprocating motion of the spreading plate 27 and the periodic vibration of the placement plate 21. A dust cover 5 is also provided on the side of the tea storage box 2, covering the synchronous pulleys 40 and the synchronous belt 41 to prevent dust accumulation and improve operational safety.

[0045] Working principle: First, the fragrance is efficiently released within the fragrance storage box 1 using physical means such as ultrasound or microwaves, driven by compressed gas, forming an airflow rich in volatile aromatic substances (VOCs). The concentration of this airflow is monitored and controlled in real time by a VOCs concentration detector 4 to ensure it remains stable within the optimal adsorption concentration range. Subsequently, this controllable concentration of aroma airflow is transported to the tea storage box 2, where conditions are kept constant. Inside the box, the tea leaves are first evenly spread to a predetermined thickness using a spreading mechanism, then switched to vibration mode, causing the tea layer to form and maintain a loose state under high-frequency micro-vibration, providing an effective contact area for aroma molecules. In a precisely controlled low-temperature, high-humidity environment, the porous structure of the tea leaves fully expands, efficiently and evenly adsorbing the flowing aroma molecules. By monitoring the changes in VOCs concentration within the tea storage box 2, and considering the preset number of scenting cycles, the scenting process is terminated when the concentration stabilizes and the set number of scenting cycles is reached. Some of the unadsorbed aroma can be extracted and collected by a vacuum pump 14 for reuse, forming a highly efficient closed-loop system. The entire process achieves precise and intelligent control from aroma generation and delivery to adsorption.

[0046] By separating aroma generation from tea leaf adsorption, the problem of aroma separation in scented tea is fundamentally solved. Valve control on the transmission pipeline 3 ensures the stability and precision of aroma supply; the quickly replaceable spice storage box 8 greatly improves production continuity and efficiency; simultaneously, the synergistic effect of the spreading and vibration mechanisms ensures that the tea leaves remain loose and uniform during adsorption, allowing the aroma airflow to penetrate the tea layer evenly and fully, avoiding adsorption dead zones caused by static spreading, greatly improving the uniformity and efficiency of aroma adsorption, significantly shortening the scenting cycle, and resulting in a finished scented tea with a full and consistent aroma.

[0047] Example 3 Based on Example 2, in order to further improve the scenting efficiency and quality, please refer to... Figures 3 to 4 , Figures 8 to 9 As shown, three layers of placement plates 21 are arranged in parallel along the vertical direction inside the tea storage box 2. Each layer of placement plate 21 constitutes an independent adsorption unit and is equipped with the same spreading mechanism and vibration mechanism as in Example 2.

[0048] To drive all the spreading and vibration mechanisms, all the reciprocating screws 22 are interconnected through synchronous pulleys 40 and synchronous belts 41 to ensure that each layer of spreading plates 27 moves synchronously and in the same direction; similarly, all the drive shafts 35 are also linked through synchronous pulleys 40 and synchronous belts 41 to ensure that the vibration of each layer of placement plates 21 is synchronized.

[0049] A centralized hopper 42 is installed at the top of the tea storage box 2. The hopper 42 is connected to a rigid guide pipe 44 via a guide hose 43, which is fixed to a moving plate 24 driven by a reciprocating screw 22. The lower part of the rigid pipe is slidably connected to a fixed plate 45 fixed inside the box. The fixed plate 45 has a number of feed pipes 46 that match the number of layers of the placement plates 21. During feeding, the drive mechanism moves the guide pipe 44, aligning it with the feed pipes 46 of each layer in sequence, thereby achieving automated and uniform distribution of tea leaves to each layer of the placement plates 21.

[0050] To ensure that the aroma is delivered to each layer of tea leaves, the transmission pipe 3 is connected to a four-way fitting 16 before entering the tea storage box 2. Its multiple outlets are connected to each layer of the box via independent air guide pipes. In addition, the air inlet of the vacuum pump 14 is also connected to each layer of the box via a four-way fitting 16, and the air outlet is collected in the gas collection box 15 via an exhaust pipe. This allows the waste gas containing residual aroma to be returned to the spice storage box 1, achieving aroma recycling, saving spices, and reducing emissions.

[0051] This embodiment, through its multi-layered structural design, significantly improves space utilization and the amount of tea processed per batch, meeting the demands of large-scale continuous production. The synchronous drive system and centralized feeding system ensure coordinated operation of the multi-layered equipment and convenient, efficient feeding. The aroma distribution and circulation system ensures consistent tea adsorption effects across all layers and maintains economic efficiency in production.

[0052] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not describe all details exhaustively, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification.

Claims

1. A method for scenting tea, characterized in that, Includes the following steps: S1. Loading and spreading: Place the spices in the spice storage box (1), and put the tea into the placement plate (21) of the tea storage box (2) and spread it evenly. S2. Environmental preset: Introduce compressed gas into the spice storage box (1), and select to start the ultrasonic or microwave heating module according to the type of spice; Set target heating parameters, use VOCs concentration detector (4) in the spice storage box (1) to monitor aroma concentration, and dynamically control aroma within the preset concentration range; simultaneously set target temperature and humidity in the tea storage box (2) through cooling device and ultrasonic humidifier (11); S3, Aroma delivery and adsorption: When the aroma concentration reaches the set value, the aroma is delivered to the tea storage box (2) so that the tea can adsorb the aroma; S4: Status monitoring: By monitoring the change in VOCs concentration in the tea storage box (2) and combining it with the preset number of scenting times, when the concentration tends to stabilize and the preset number of scenting times is reached, the scenting is determined to be over.

2. A tea scenting device, characterized in that, It includes a spice storage box (1) and a tea storage box (2), which are connected by a transmission pipe (3); the transmission pipe (3) is provided with a first shut-off valve (301) at the air inlet end and a first one-way valve (302) at the air outlet end. The spice storage box (1) is equipped with an ultrasonic heating module and a microwave heating module. A VOCs concentration detector (4) and a first pressure relief valve (101) are installed on the top. A connecting pipe (7) for compressed gas is connected to the bottom. A second one-way valve (702) and a second shut-off valve (701) are installed on the connecting pipe (7) from the gas outlet end. The tea storage box (2) is connected to a refrigeration device. It is equipped with an ultrasonic humidifier (11), a temperature and humidity sensor (12), a VOCs concentration detector (4), and a vacuum pump (14) connected to the back. A door (6) is provided on one side of the tea storage box (2).

3. The tea scenting device according to claim 2, characterized in that, The refrigeration equipment is a split mechanical compression refrigeration system (10), including a refrigeration compressor and a condenser located outside the tea storage box (2), and an evaporator (13) located inside the tea storage box (2). The evaporator (13) is connected to the refrigeration compressor and the condenser through refrigeration pipes to form a refrigeration loop. The tea storage box (2) is also equipped with a circulating fan.

4. The tea scenting device according to claim 2, characterized in that, The tea storage box (2) is equipped with a placement plate (21) to hold tea. A spreading mechanism is set above the placement plate (21) and a vibration mechanism is set below it. The spreading mechanism includes a reciprocating screw (22) and a guide rod (23) set inside the tea storage box (2). A moving plate (24) is connected to the screw and the guide rod (23). A connecting column (26) is connected to the moving plate (24) through a first spring (25). A spreading plate (27) is fixed at the bottom of the connecting column (26). The bottom of the spreading plate (27) is rake-shaped. One end of the screw passes through the tea storage box (2) and is connected to the drive mechanism.

5. The tea scenting device according to claim 4, characterized in that, Two vertical plates (28) are fixedly connected to the upper surface of the spreading plate (27). A first wedge block (29) and a third wedge block (31) are fixedly connected to the side of the two vertical plates (28) that are far apart from each other. A second wedge block (30) corresponding to the first wedge block (29) is fixedly connected to the box door (6). A fourth wedge block (32) corresponding to the third wedge block (31) is fixedly connected inside the tea storage box (2).

6. The tea scenting device according to claim 4, characterized in that, The vibration mechanism includes a square plate (33) fixed to the inner wall of the tea storage box (2), and the square plate (33) is connected to the placement plate (21) by a second spring (34); it also includes a cam (36) driven by a drive shaft (35) located below the placement plate (21), and the drive shaft (35) passes through the tea storage box (2) and is connected to the drive mechanism.

7. The tea scenting device according to claim 6, characterized in that, The drive mechanism includes a motor (37) installed outside the tea storage box (2), which drives the drive shaft (38) through a coupling. Two one-way bearings (39) with opposite directions are installed on the drive shaft (38), and a synchronous pulley (40) is installed on each one-way bearing (39). The power is transmitted to the reciprocating screw (22) and the synchronous pulley (40) of the drive shaft (35) through the synchronous belt (41).

8. The tea scenting device according to claim 2, characterized in that, The spice storage box (1) is connected to a storage box (8) with a hollow bottom that can be pulled out. The box wall of the spice storage box (1) is connected to a support plate (9) for supporting the storage box (8). The contact part between the storage box (8) and the box wall of the spice storage box (1) is provided with a rubber layer.

9. The tea scenting device according to claim 2, characterized in that, The outlet of the vacuum pump (14) is also connected to the gas collection box (15) through the exhaust pipe. The gas collection box (15) is provided with a gas delivery pipe (17) connected to the spice storage box (1). The gas collection box (15) is also provided with a second pressure relief valve (18). The gas delivery pipe (17) is provided with a third shut-off valve (19) and a third check valve (20).

10. The tea scenting device according to claim 4, characterized in that, The tea storage box (2) has multiple layers of placement plates (21) arranged vertically inside. Each layer of placement plate (21) is equipped with a spreading mechanism and a vibration mechanism. All reciprocating screws (22) are interconnected by synchronous pulleys (40) and synchronous belts (41), and all drive shafts (35) are also linked by synchronous pulleys (40) and synchronous belts (41). The top of the tea storage box (2) is equipped with a hopper (42), which is connected to a guide tube (44) through a guide hose (43). The guide tube (44) is fixed to the reciprocating screws. On the moving plate (24) driven by the lever (22), the material guide tube (44) is slidably connected to the fixed plate (45) fixed in the box body. The fixed plate (45) is provided with a number of feeding pipes (46) that are the same as the number of layers of the placement plate (21). The transmission pipe (3) is connected to the four-way pipe fitting (16) before entering the tea storage box (2). Its multiple outlets are connected to the space of each layer in the box through the pipes. The air inlet of the vacuum pump (14) is also connected to the space of each layer in the box through the four-way pipe fitting (16). The air outlet is collected to the air collection box (15) through the pipes.

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