Fermentation equipment for black tea

Abstract

The invention discloses black tea fermentation equipment, and belongs to the field of tea leaf fermentation equipment.The fermentation chamber is internally provided with multiple layers of fermentation bins for containing black tea, the fermentation chamber is made of heat preservation materials, and each layer of fermentation bin is internally provided with a temperature sensor and a humidity sensor; the temperature control system comprises a heater and a cooling system, and the heater and the cooling system can automatically and adaptively adjust the temperature of the fermentation chamber according to sensor data; the humidifier sprays water mist into the fermentation chamber, the dehumidifier comprises a suction pump and a filter ball connected with the suction pump, the filter ball comprises a hollow spherical shell, the spherical shell is filled with a drying agent, the suction pump is installed at the bottom end in the fermentation chamber, and when the suction pump is started, after water vapor in air in the fermentation chamber is captured by the filter ball, the air in the fermentation chamber is discharged out of the fermentation chamber. And directly discharging into a corresponding fermentation bin. According to the invention, black tea fermentation can be rapidly and efficiently carried out, the fermentation conditions are accurately and rapidly controlled, and the energy-saving property is good.

Description

Technical Field

[0001] The invention relates to the technical field of black tea production equipment, in particular to black tea fermentation equipment. Background Art

[0002] As one of the most consumed teas in the world, the quality of black tea depends largely on the fermentation process. Traditional black tea fermentation mainly relies on manual experience. By controlling the temperature, humidity and other environmental factors in the entire fermentation room or fermentation box, the oxidative polymerization of polyphenols in tea leaves is promoted to form the unique aroma and color of black tea. However, since black tea itself is stacked layer by layer and the fermentation room has a certain height, the heat cannot be evenly distributed in the entire fermentation room. The measurement of the traditional temperature and humidity sensor at a single position cannot well represent the temperature and humidity state of the entire fermentation room. Moreover, when controlling the humidity, the hot air in the fermentation room is completely drawn out of the room and connected to an external drying device for drying, which also greatly consumes heat and causes a serious short-term imbalance in the indoor temperature. Therefore, the existing traditional fermentation equipment has problems such as difficult control of fermentation conditions and unstable fermentation effects, which affect the uniformity of black tea quality and production efficiency.

[0003] In addition, some existing fermentation boxes have structures similar to or even exactly the same as common electric steamers, and require manual loading and unloading of materials layer by layer, which is very troublesome. Moreover, the volume of each layer cannot be changed. Once the heating is started, the heat will quickly dissipate throughout the entire layer, consuming a lot of power.

[0004] Therefore, developing a device that can intelligently regulate the fermentation environment is of great significance for improving the consistency and efficiency of black tea production. Summary of the invention

[0005] In view of the introduction to the above technical status quo, the purpose of the present invention is to provide a black tea fermentation equipment to better solve the technical problems of uneven temperature and humidity control during black tea fermentation, and the fermentation efficiency and effect need to be improved. It can flexibly and accurately control the fermentation conditions, adjust the heat power consumption, and has good energy saving performance.

[0006] To achieve the above-mentioned purpose, the present invention adopts a black tea fermentation equipment, including a fermentation chamber, wherein the fermentation chamber has multiple layers of fermentation bins for placing black tea, the fermentation chamber is made of heat-insulating material, and each layer of the fermentation bin is provided with a temperature sensor and a humidity sensor; it also includes a temperature control system and a humidity control system; wherein the temperature control system includes a heater and a cooling system, and the heater and the cooling system can automatically and adaptively adjust the temperature of the fermentation chamber according to the sensor data; the humidity control system includes a humidifier and a dehumidifier, the humidifier sprays water mist into the fermentation chamber, the dehumidifier includes a suction pump and a filter ball connected thereto, the filter ball includes a hollow spherical shell, the spherical shell is filled with a desiccant, the suction pump is installed at the bottom end of the fermentation chamber, and when the suction pump is turned on, the air in the fermentation chamber is directly discharged into the corresponding fermentation bin after the water vapor therein is captured by the filter ball.

[0007] Furthermore, the respective operation panels of the temperature control system and the humidity control system are arranged on the upper front side of the fermentation chamber shell.

[0008] Furthermore, the fermentation chamber is a rectangular space, and a plurality of placement plates are arranged horizontally and at intervals in the fermentation chamber, and two adjacent placement plates and the inner wall of the fermentation chamber form a fermentation bin.

[0009] Furthermore, a slide groove is opened on the side of the placement plate along its length direction, and two rollers opposite to each other are rotatably installed in the slide groove. One end of the axially installed shaft of the roller extends out of the slide groove and is inserted into a groove horizontally arranged on the inner wall of the fermentation chamber; the shaft section of the shaft extending out of the slide groove is connected to a transmission device to make the two rollers move closer to or away from each other.

[0010] Furthermore, the drum and the rotating shaft are coaxially rotated together, the cross-section of the shaft section of the rotating shaft extending out of the slide groove is a rectangular structure, and the shaft section is installed in a linear sliding manner in the groove; the transmission device is a screw mechanism, and the screw of the screw mechanism is rotatably installed in the fermentation chamber and parallel to the rolling direction of the drum, and the screw thread cooperates to pass through the center of the shaft section, so that when the screw rotates, the shaft section moves linearly with the entire rotating shaft and the drum.

[0011] Furthermore, the two opposite rollers are arranged opposite to each other or staggered, one end of the lead screw is transmission-connected to a driving motor, and the threaded sections on the lead screw for threadably matching the two shaft sections have opposite rotation directions.

[0012] Furthermore, each layer of the fermentation bin is equipped with a separate heater, and the heating power of these heaters arranged from top to bottom decreases successively; the two rotating shafts in the same mounting plate are each driven by a screw mechanism composed of a screw, and the two rotating shafts are arranged one after the other, and the opposite ends of the two rollers are respectively provided with a limit tile and a positioning column, and the limit tile is an arc-shaped tile-like structure. When the two rotating shafts are close to each other to be coaxially connected, the positioning column is in contact with the inner wall of the limit tile.

[0013] Furthermore, a magnet is embedded in the end surface of the roller where the limiting shoe is located, and the magnet enables the end surface of the positioning column to contact and be fixed as a whole with the end surface of the roller facing it.

[0014] Furthermore, a vertically arranged mounting arm is fixed on the shaft section, and the top end of the mounting arm is fixedly connected to a partition, and the partition is a vertically retractable telescopic plate, and the bottom end of the telescopic plate is slidably matched with the upper surface of the placement plate, and the top telescopic end of the telescopic plate is in sliding contact with the bottom surface of the placement plate of the upper layer.

[0015] Furthermore, the mounting arm and the partition are adsorbed together by a magnetic structure; on the two opposite side walls of each of the fermentation bins, a receiving groove is respectively provided, the receiving groove is for the telescopic plate to enter as a whole, and the bottom of the receiving groove has a magnet, so that after the telescopic plate enters the receiving groove, it is fixed at the bottom of the groove and separated from the mounting arm, and then when the two rollers are close to each other to be coaxial, the placement plate flips and swings to one side, and then the tea leaves on the surface are poured onto the next layer of placement plate; a resistance wire for heating is provided in each fermentation bin, and the resistance wire is spirally arranged in the length direction of the placement plate; a conductive strip is fixed on one side of the two telescopic plates, and when the telescopic plate moves in the fermentation bin, the two conductive strips respectively contact the corresponding parts of the resistance wire, so that the resistance wire between the two conductive strips is connected to the circuit and generates heat.

[0016] The black tea fermentation equipment of the present invention adopts the detection of temperature and humidity of each multi-layer fermentation bin independently, and makes targeted adjustments to temperature and humidity. The adjustment mechanism is more flexible and accurate, and the temperature and humidity are strictly controlled to maintain good fermentation conditions. Moreover, the installation method of the independent support of the roller of the placement plate specially set up in the present invention can allow the placement plate to automatically flip over, and drop the black tea to the bottom layer one by one, so as to realize the convenient operation of top loading and bottom unloading, and can also flexibly change the size of each fermentation bin through the telescopic plate, and correspondingly open the corresponding heating power section, which has the purpose of intelligently controlling the heating power with an extremely simple method to save power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following are auxiliary illustrations for explaining some specific embodiments of the present invention. The drawings described are mainly the principles of the specific operation execution structures or methods of some embodiments of the present invention. However, this does not mean that the physical structure or operation steps of the present invention can only be as shown in the drawings.

[0018] Figure 1 It is a front view of the present invention;

[0019] Figure 2 yes Figure 1 The enlarged structure diagram at A in the middle;

[0020] Figure 3 yes Figure 2 The enlarged structure diagram at B in the middle;

[0021] Figure 4 yes Figure 2 The enlarged structure diagram at C in the middle;

[0022] Figure 5-7 It is a schematic diagram of three structures of driving roller.

[0023] In the figure, fermentation chamber 1, operation panel 2, suction pump 3, spherical shell 4, desiccant 5, telescopic plate 6, receiving groove 7, magnet 8, placement plate 9, slide 10, roller 11, resistance wire 12, rotating shaft 13, magnet 14, limit baffle 15, mounting arm 16, magnetic attraction structure 17, temperature sensor 20, humidity sensor 21. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be fully described below, and some core features of the embodiments will be specifically shown in the accompanying drawings, wherein the same or similar reference numerals in the drawings represent the same or similar technical features, or structures or steps or processes with similar functions. Other embodiments replaced by ordinary technicians based on these embodiments without the need for creative work also belong to the protection scope of the present invention.

[0025] See also Figure 1The black tea fermentation equipment shown mainly includes a fermentation chamber 1, and the fermentation chamber 1 has multiple layers of fermentation bins for placing black tea. The black tea is stacked and fermented in the fermentation bins. For insulation, the fermentation chamber 1 is made of heat-insulating materials, and each layer of the fermentation bin is provided with a temperature sensor 20 and a humidity sensor 21, so as to detect the temperature and humidity in the corresponding fermentation bin in real time. At the same time, the present embodiment is also equipped with a special temperature control system and humidity control system; specifically, this temperature control system mainly includes a heater and a cooling system, and the heater and the cooling system can automatically and adaptively adjust the temperature of the fermentation chamber 1 according to the sensor data to maintain the corresponding temperature level. In addition, in practice, the humidity control system includes a humidifier and a dehumidifier. The humidifier sprays water mist into the fermentation chamber 1 to maintain the internal humidity, and the dehumidifier is as follows Figure 1 As shown, it mainly includes a suction pump 3 and a filter ball connected thereto. The filter ball includes a hollow spherical shell for air to enter. At the same time, a desiccant 5 is filled in the spherical shell to dry the air. Because moist water vapor will go down, in this embodiment, it is best to install the suction pump 3 at the bottom end of the fermentation chamber 1. When in use, when the suction pump 3 is turned on, the air in the fermentation chamber 1 is directly discharged into the corresponding fermentation bin after the water vapor therein is captured by the filter ball to maintain the dry state of the internal air. In specific practice, multiple pipelines can be set in the fermentation chamber 1, each connected to the corresponding fermentation bin, each provided with a solenoid valve to independently connect to the filter ball and independently connect to the outlet of the suction part. These can be adaptively designed and manufactured. For the humidification and cooling system, the corresponding pipelines can be adaptively arranged in the same way. It is especially suitable for large fermentation boxes and multi-batch large-scale fermentation of black tea.

[0026] As a specific implementation structure, such as Figure 1 As shown, the operating panels 2 of the temperature control system and the humidity control system should be arranged on the upper front side of the outer shell of the fermentation chamber 1 for easy operation and viewing.

[0027] More specifically, the fermentation chamber 1 is a rectangular space, in which a number of placement plates 9 are horizontally and spaced apart. The placement plates 9 have dense mesh holes for ventilation, but the size is not large enough to allow the rolled black tea to pass through. Two adjacent placement plates 9 and the inner wall of the fermentation chamber 1 just form a fermentation bin for storing black tea for fermentation.

[0028] In practice, Figure 1-4As shown, a slide groove 10 (the number is not shown in the figure) can be opened on the side of the placement plate 9 along its length direction, and two rollers 11 opposite to each other are rotatably installed in the slide groove 10, and one end of the axially installed rotating shaft 13 of the roller 11 extends out of the slide groove 10 and is inserted into a groove (not shown in the figure) horizontally arranged on the inner wall of the fermentation chamber 1, so as to realize the installation of the roller 11 in the slide groove 10, and therefore the placement plate 9 can be supported by the roller 11. When the two rollers 11 are opposite to each other, including facing each other directly and offset, the placement plate 9 can be supported, so that the placement plate 9 is horizontally located in the fermentation chamber 1. In addition, the shaft section of the rotating shaft 13 extending out of the slide slot 10 is connected to a transmission device (not shown in the figure) to make the two rollers 11 move closer to or away from each other. In practice, the transmission device can be composed of existing parts such as motors, chains or gears, which can drive the rollers 11 or drive the rotating shaft 13 or the above-mentioned shaft sections to move linearly. It can even directly use cylinders or electric push rods to perform the above-mentioned drive. Because the fermentation temperature of black tea is usually not higher than 30°C, general motors, electric push rods and cylinders can be completely installed inside, and the transmission structure and installation position can be adaptively selected. This embodiment will not be described in detail.

[0029] In another specific embodiment, the roller 11 in this embodiment rotates coaxially with the rotating shaft 13, that is, the rotating shaft 13 acts as a core shaft, and the rotating shaft 13 moves linearly, thereby driving the roller 11 to roll with the inner wall of the slide chute 10 to reduce friction. In specific manufacturing, the cross section of the shaft section of the rotating shaft 13 extending out of the slide chute 10 may be a rectangular structure, that is, this section is a rectangular rod-shaped structure, and this shaft section is linearly slidably installed in a groove mentioned above to achieve linear movement. As for the transmission device, in this embodiment, please refer to Figure 5-6 The reference design is a screw mechanism, the screw of the screw mechanism is rotatably installed in the fermentation chamber 1 and is parallel to the rolling direction of the drum 11. The screw thread cooperates to pass through the center of the shaft section, that is, there is a corresponding threaded hole in the center of the shaft section, so that when the screw rotates, based on the action of the formed screw mechanism, this shaft section moves linearly with the entire rotating shaft 13 and the drum 11, so that the two drums 11 move closer to or away from each other.

[0030] In the above embodiments, as one of the specific implementation structures, Figure 5-6 As shown, the two opposite rollers 11 are arranged opposite to each other or staggered, and accordingly, one end of the lead screw used therefor is to be connected to a driving motor, and the threaded sections on the lead screw used to threadably match the two shaft sections have opposite rotation directions, thereby achieving the approach and separation of the two rollers 11, so as to adjust the mounting plate 9 to maintain a relatively stable horizontal installation posture under the gravity of the black tea.

[0031] As a recommended preferred embodiment, Figure 1As shown, a heater is separately provided in each layer of the fermentation bin. The heater can be a resistance wire 12 for heating. The heating power of these heaters arranged from top to bottom decreases successively. In this way, after the black tea is poured from the top of the fermentation chamber 1 into the top placement plate 9, it can heat up relatively quickly to reach the fermentation temperature and be in a fermentation state. As the fermentation proceeds, the black tea itself has risen to a certain temperature, and it can be poured toward the next-level placement plate 9 so that the black tea is stacked on the next-level placement plate 9. The fermentation temperature is maintained by the heat stored inside the fermentation chamber 1 and the heater of the fermentation bin. Then, as black tea is continuously added to the fermentation chamber 1, the black tea gradually descends and is stacked on a placement plate 9 for receiving materials at the bottom layer. The placement plate 9 is taken out, and the fermented black tea of ​​the layer can be taken out. This realizes dynamic and continuous step-by-step fermentation, which can have an excellent fermentation effect and reduce the time and power consumption of the fermentation process. Moreover, it can also play the role of automatically outputting the fermented black tea, without the need to manually push and pull the placement plate 9 layer by layer to add or take out materials in the mode of a rice steamer, as in a traditional fermentation box. At the same time, in this embodiment, Figure 7 As shown, the two rotating shafts 13 in the same placement plate 9 need to each use a lead screw to form a corresponding lead screw mechanism, and the two rotating shafts 13 are arranged one after the other. The ends of the two rollers 11 facing each other are respectively provided with a limit tile and a positioning column. The limit tile is an arc-shaped tile-like structure, which plays a role in blocking the positioning column from moving forward. When the two rotating shafts 13 are close to each other to be coaxially connected, the positioning column and the inner wall of the limit tile are in contact. At this time, the movement of the lead screw is blocked and stops rotating. The placement plate 9 is in a coaxial supported state of the two rollers 11. In this case, the placement plate 9 will inevitably tip over due to the imbalance of gravity on the left and right sides, so as to achieve the purpose of automatically dumping the tea leaves downward. After the dumping is completed, the two rollers 11 separate again, and the placement plate 9 is automatically adjusted to a horizontal supported state. In order to maintain the stable position of the rollers 11 when they are coaxial, it can be as follows Figure 3 As shown, a magnet 14 is embedded in the end face of the roller 11 where the limiting shoe is located. The magnet 14 makes the end face of the positioning column contact and fix with the end face of the roller 11 facing it as a whole, maintaining the coaxial fixed position relationship unchanged.

[0032] In addition, if Figure 3-4 A vertically arranged mounting arm 16 can also be fixed on the shaft section. The mounting arm 16 is located outside the side of the placement plate 9. The top of the mounting arm 16 is fixedly connected to a partition, and the partition is a vertically retractable telescopic plate 6. The bottom end of the telescopic plate 6 slides with the upper surface of the placement plate 9, and the top telescopic end of the telescopic plate 6 slides in contact with the bottom surface of the placement plate 9 of the upper layer, thereby reducing the fermentation bin of the corresponding layer to a rectangular area of ​​space, thereby changing the actual working volume of the corresponding fermentation bin.

[0033] Accordingly, if Figure 3-4, the mounting arm 16 and the partition are adsorbed together by a magnetic attraction structure 17, that is, the two elements are detachably connected together by a magnetic element; at the same time, a receiving groove 7 is respectively provided on the two opposite side walls of each fermentation bin, and the receiving groove 7 is for the telescopic plate 6 to enter as a whole, so the structure of the above-mentioned mounting arm 16 can be made into an L-shape. There is a magnet 8 at the bottom of the receiving groove 7, which can be an electromagnet, so that the magnetism disappears instantly after power failure, so that the telescopic plate 6 can be released when needed. After entering the receiving groove 7, the telescopic plate 6 is fixed to the bottom of the groove, thereby separating from the mounting arm 16, because the magnetic attraction force of the magnet 14 is much greater than the magnetic attraction force of the above-mentioned magnetic attraction structure 17. After that, when the two rollers 11 are close to each other to be coaxial, because the telescopic plate 6 has been removed, after being coaxial, the placement plate 9 loses balance and will flip to one side and swing down, and then the tea leaves on the surface will pour onto the next layer of placement plate 9. A very useful structural design is: such as Figure 1 As shown, a resistance wire 12 for heating is provided in each fermentation bin, and the resistance wire 12 is arranged in a spiral in the length direction of the placement plate 9; in addition, a conductive strip (not shown in the figure) needs to be fixed on one side of the two telescopic plates 6, for example, a conductive strip is fixed on the inner side of the telescopic plate 6, and the conductive strip is also arranged vertically and keeps sliding contact with the above-mentioned resistance wire 12, because the fermentation temperature of black tea will not exceed 30 degrees, generally in the range of 20-30 degrees, gradual transitional fermentation is best, so the resistance wire 12 is sufficient to heat, and in addition, in this embodiment, multiple resistance wires 12 are respectively heated, which is sufficient compared to traditional centralized heating. During use, when the telescopic plate 6 moves in the fermentation bin, the two conductive strips are respectively in contact with the corresponding parts of the resistance wire 12, so that the resistance wire 12 between the two conductive strips is connected to the circuit and heats up, that is, the actual heating section of the resistance wire 12 is only located in the actual fermentation space between the two telescopic plates 6 filled with black tea at this time, so that the heat can be reduced from being lost aimlessly in other spaces in the fermentation bin.

[0034] The above series of specific implementation details are merely some preferred embodiments of the present invention and cannot be used to limit the protection scope of the claims of the present invention. A person skilled in the art can simply change the design ideas based on the understanding of the above embodiments and the reference to the basic principles recorded in the claims of the present invention. However, these design changes still fall within the protection scope of the invention.

Claims

1. A black tea fermentation device, comprising a fermentation chamber (1), wherein the fermentation chamber (1) has multiple layers of fermentation chambers for placing black tea, characterized in that: The fermentation chamber (1) is made of heat-insulating material, and each layer of the fermentation chamber is provided with a temperature sensor (20) and a humidity sensor (21); It also includes a temperature control system and a humidity control system; The temperature control system comprises a heater and a cooling system, both of which are capable of automatically and adaptively adjusting the temperature of the fermentation chamber (1) according to sensor data; the humidity control system comprises a humidifier and a dehumidifier, the humidifier sprays water mist into the fermentation chamber (1), the dehumidifier comprises a suction pump (3) and a filter ball connected thereto, the filter ball comprises a hollow spherical shell, the spherical shell is filled with a desiccant (5), the suction pump (3) is installed at the bottom end of the fermentation chamber (1), and when the suction pump (3) is turned on, the air in the fermentation chamber (1) is directly discharged into the corresponding fermentation bin after the water vapor therein is captured by the filter ball.

2. The black tea fermentation equipment according to claim 1, characterized in that: The respective operating panels (2) of the temperature control system and the humidity control system are arranged on the upper front side of the outer shell of the fermentation chamber (1).

3. The black tea fermentation equipment according to claim 1, characterized in that: The fermentation chamber (1) is a rectangular space, and a plurality of placement plates (9) are arranged horizontally and at intervals in the fermentation chamber (1). Two adjacent placement plates (9) and the inner side wall of the fermentation chamber (1) form a fermentation bin.

4. The black tea fermentation equipment according to claim 3, characterized in that: A slide groove (10) is provided on the side of the placement plate (9) along its length direction, and two rollers (11) are rotatably mounted opposite to each other in the slide groove (10), and one end of a rotating shaft (13) axially mounted on the roller (11) extends out of the slide groove (10) and is inserted into a groove horizontally arranged on the inner wall of the fermentation chamber (1); the shaft section of the rotating shaft (13) extending out of the slide groove (10) is connected to a transmission device so that the two rollers (11) are moved closer to or away from each other.

5. The black tea fermentation equipment according to claim 4, characterized in that: The roller (11) and the rotating shaft (13) are coaxially rotated in cooperation, the cross-section of the shaft section of the rotating shaft (13) extending out of the slide groove (10) is a rectangular structure, and the shaft section is installed in a linear sliding manner in the groove; the transmission device is a screw mechanism, the screw of the screw mechanism is rotatably installed in the fermentation chamber (1) and is parallel to the rolling direction of the roller (11), and the screw thread cooperates to pass through the center of the shaft section, so that when the screw rotates, the shaft section moves linearly with the entire rotating shaft (13) and the roller (11).

6. The black tea fermentation equipment according to claim 5, characterized in that: The two opposite rollers (11) are arranged opposite to each other or staggered, one end of the lead screw is drivingly connected to a driving motor, and the threaded sections on the lead screw for threading with the two shaft sections have opposite rotation directions.

7. The black tea fermentation equipment according to claim 5, characterized in that: Each layer of the fermentation bin is equipped with a heater, and the heating power of the heaters arranged from top to bottom decreases successively; The two rotating shafts (13) in the same placement plate (9) are each driven by a screw mechanism composed of a screw, and the two rotating shafts (13) are arranged one in front of the other. The ends of the two rollers (11) facing each other are respectively provided with a limit shoe and a positioning column. The limit shoe is a circular arc tile-like structure. When the two rotating shafts (13) are brought close to each other to be coaxially connected, the positioning column is in contact with the inner side wall of the limit shoe.

8. The black tea fermentation equipment according to claim 7, characterized in that: A magnet (14) is embedded in the end surface of the roller (11) where the limiting shoe is located, and the magnet (14) enables the end surface of the positioning column to contact and be fixed to the end surface of the roller (11) facing it.

9. The black tea fermentation equipment according to claim 7, characterized in that: A vertically arranged mounting arm (16) is also fixed on the shaft section, and the top end of the mounting arm (16) is fixedly connected to a partition, and the partition is a vertically retractable telescopic plate (6), and the bottom end of the telescopic plate (6) is in sliding cooperation with the upper surface of the placement plate (9), and the top telescopic end of the telescopic plate (6) is in sliding contact with the bottom surface of the placement plate (9) of the upper layer.

10. The black tea fermentation equipment according to claim 7, characterized in that: The mounting arm (16) and the partition are adsorbed together by a magnetic attraction structure (17); a receiving groove (7) is provided on two opposite side walls of each fermentation bin, the receiving groove (7) is for the telescopic plate (6) to enter as a whole, and the bottom of the receiving groove (7) has a magnet (8), so that the telescopic plate (6) is fixed to the bottom of the groove after entering the receiving groove (7) and is separated from the mounting arm (16), and then when the two rollers (11) are close to each other to be coaxial, the placement plate (9) turns to one side and swings down, and then the tea leaves on the surface are poured onto the placement plate (9) of the next layer; A resistance wire (12) for heating is provided in each fermentation bin, and the resistance wire (12) is arranged in a spiral in the length direction of the placement plate (9); a conductive strip is fixed on one side of the two telescopic plates (6), and when the telescopic plates (6) move in the fermentation bin, the two conductive strips respectively contact corresponding parts of the resistance wire (12), so that the resistance wire (12) between the two conductive strips is connected to the circuit and generates heat.

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