Tea processing device and cold-brew black tea processing method

Abstract

The present invention discloses a tea processing device and a cold-brew black tea processing method, comprising a withering box, characterized in that the top of the withering box is open, a support belt is provided in the withering box, the upper part of the support belt is used to stack tea leaves, a support plate is provided in the withering box, the support plate is located below the support belt and has a plurality of air holes extending therethrough; a hot air cavity is formed at the lower part of the support plate; the support belt is a flexible, long strip structure, and further comprises two groups of winding rollers, the two groups of winding rollers being respectively provided at the left and right ends of the support belt, the two ends of the support belt being respectively connected to the outer periphery of the two groups of winding rollers and being wound by the winding rollers. The present invention can freeze and extrude tea leaves, and after processing, the cell tissue is broken, and the substance components contained therein are easily brewed out at room temperature or even low temperature, without causing a bitter taste.

Description

Technical Field

[0001] The present invention relates to the technical field of tea production, and more particularly to a tea processing device and a cold-brew black tea processing method. Background Art

[0002] Tea is a traditional Chinese beverage, rich in tea polyphenols, amino acids, polysaccharides, proteins, minerals, and various vitamins, boasting a wealth of nutritional value. The traditional way to drink tea in my country is to steep it in hot water. This hot brewing method quickly releases most of the tea's nutrients, but because the tea is too hot, it cannot be consumed immediately, making it unsuitable for today's fast-paced lives. To enhance the release of its nutrients, some teas are rolled multiple times to disrupt the tea's internal structure and enhance brewing efficiency.

[0003] During the tea production process, tea leaves undergo a withering process. Traditional withering methods use sunlight or hot air to wilt the leaves, facilitating subsequent processing. However, withering solely through hot air or heat is relatively inefficient, as the leaves are largely unaffected by physical compression. This slows the withering process and affects tea production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a tea processing device that can efficiently wither tea leaves and improve the withering efficiency of tea leaves.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a tea processing device, comprising a withering box, the top of which is open, a support belt is provided in the withering box, the upper part of the support belt is used for stacking tea leaves, a support plate is provided in the withering box, the support plate is located below the support belt, and is provided with a plurality of air holes passing through it from top to bottom; a hot air cavity is formed at the lower part of the support plate; the support belt is a flexible long strip structure, and also comprises two groups of winding rollers, which are respectively provided at the left and right ends of the support belt, and the two ends of the support belt are respectively connected to the outer periphery of the two groups of winding rollers, and are wound by the winding rollers.

[0006] The present invention is further configured such that the support belt can be wound around the periphery of the winding roller to form a winding portion, and the support belts at the winding portion are stacked and wound, and tea leaves can be clamped between adjacent support layers.

[0007] The present invention is further configured such that a pressure roller is pressed against the lower part of the winding roller, and the height of the pressure roller can be adjusted up and down; both ends of the pressure roller are rotatably connected to sliders, and the sliders are slidably supported by slide rails and can slide up and down, and the lower part of the slider is elastically supported by a support spring.

[0008] The present invention is further configured such that a support roller is provided between the winding roller and the withering box, the support belt is passed around the upper side of the support roller, and the height of the support roller can be adjusted up and down.

[0009] The present invention is further configured such that heating boxes are provided at both left and right ends of the withering box, two winding rollers are respectively provided in the two heating boxes, and the heating box is provided with a channel toward the side wall of the withering box, and the channel is for the support belt to pass through.

[0010] The present invention is further configured such that a ventilation hole is provided between the side wall between the heating box and the hot air cavity, a blower is provided at the ventilation hole, and the blower can blow air into the hot air cavity; the heating boxes are connected to a hot air pipe, and the hot air pipe is used to pass dry hot air into the heating cavity;

[0011] The present invention is further configured such that the support plate is arranged at an angle, one side of the support plate contacts the lower side of the support belt, and the gap between the other side of the support plate and the support belt gradually increases.

[0012] The present invention is further configured such that the winding roller is rotationally supported by a support shaft, and the two winding rollers can rotate in cooperation with each other to realize the movement and adjustment of the support belt; the winding roller is rotatably connected to the support shaft through a bearing; and it also includes a transmission shaft, a driver and two sets of transmission mechanisms, the transmission shaft is driven to rotate by the driver, and the transmission shaft drives the two support shafts respectively through the two sets of transmission mechanisms.

[0013] The present invention is further configured such that the transmission mechanism is a worm gear mechanism, comprising a worm wheel component and a worm component, wherein the worm component is fixedly mounted on the transmission shaft, and the worm wheel component is fixedly mounted on the support shaft, and the worm wheel component and the worm component are engaged with each other to realize transmission between the transmission shaft and the support shaft.

[0014] The present invention is further configured such that the winding roller and the corresponding support shaft are linked by a one-way linkage mechanism. When the support shaft rotates in one direction, the support shaft can drive the winding roller to rotate synchronously. When the support shaft rotates in the other direction, the support shaft can rotate freely independently of the winding roller. The one-way linkage mechanism is a one-way ratchet mechanism, and the linkage directions of the one-way linkage mechanisms of the two winding rollers are opposite.

[0015] The present invention also provides a cold-brew black tea processing method, comprising the following steps: freezing, thawing at room temperature, withering, rolling, deblocking, rolling and cutting, initial baking, moisture regaining and re-baking. During the withering process of the tea leaves, the tea processing device as described above is used.

[0016] The specific parameters are:

[0017] Freezing: Place the fresh summer and autumn tea leaves with the standard of one bud and two or three leaves in an environment of -20℃ and freeze for 12 hours.

[0018] Thawing at room temperature: After the frozen leaves are thawed at room temperature, they can generally be placed in an environment of 20-25 degrees Celsius and remain still until the frozen leaves are thawed.

[0019] Withering: After the frozen leaves are thawed at room temperature, the tea leaves are withered. During the withering process, the tea leaves are placed in the above-mentioned tea processing device for withering. During withering, the tea leaves are laid on a support belt and hot air at 33-40 degrees Celsius is blown towards the tea leaves. The withering time is 3-5 hours.

[0020] Rolling: Use 55 type rolling machine, with the leaf loading amount 1cm to 2cm lower than the rolling drum surface, the rolling time is 75min to 90min, and the rolling rate reaches 95%, which means the rolling is moderate.

[0021] Delumping: Put the rolled leaves into the delumping machine for delumping.

[0022] Kneading and cutting: Put the deblocked tea leaves into the rotor kneading and cutting machine for kneading and cutting.

[0023] Fermentation: Place the rolled and cut tea leaves into a fermentation frame (10cm thick) and place in an environment of 28-32°C with a relative humidity above 95% and good air circulation. Ferment for 3-5 hours, until the leaves are orange-red, translucent, and have a floral and fruity aroma.

[0024] Initial baking: The initial baking temperature should be 95℃~105℃, the time should be 10min~15min, and the moisture content should be 20%~10%.

[0025] Rehydration: Spread the initially baked tea leaves thinly on bamboo mats, bamboo strips and other equipment. The thickness is generally 2cm to 3cm, and the time is about 2 hours.

[0026] Repeat drying: Temperature 70℃~80℃, spread leaves 3cm~5cm thick, stir every half hour, time 1.5h~2h, bake until moisture content is below 6%. Cool to room temperature before packaging and storage.

[0027] In summary, the present invention has the following beneficial effects:

[0028] During the withering process, the tea leaves are withered by combining hot air and extrusion. When the reel is squeezed, the tea leaves clamped between the support belts are subjected to a certain squeezing force. This pressurizes the tea leaves during the withering process, which can appropriately increase the wilting speed of the tea leaves and thus improve the withering effect of the tea leaves. In addition, the support belt can reel the tea leaves into a heating box with a relatively high temperature. In the heating box, the tea leaves are subjected to the dual effects of heating and squeezing withering, thereby achieving a more efficient and rapid withering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1This is a schematic structural diagram of the tea processing device in Example 1;

[0030] Figure 2 Schematic diagram of the structure of the winding roller, pressure roller and support roller in Example 1;

[0031] Figure 3 This is a schematic structural diagram of the end portion of the pressure roller in Example 1;

[0032] Figure 4 Schematic diagram of the structure of the transmission mechanism in Example 2;

[0033] Figure 5 Schematic diagram of the structure of the one-way linkage mechanism in Example 2;

[0034] Figure 6 This is a schematic structural diagram of the one-way linkage mechanism at the left winding roller in Example 2;

[0035] Figure 7 This is a structural diagram of the one-way linkage mechanism at the right winding roller in Example 2.

[0036] Figure markings: 1. Withering box; 100. Hot air chamber; 2. Heating box; 201. Channel; 3. Support belt; 4. Support plate; 5. Ventilation hole; 6. Fan; 7. Air guide protrusion; 8. Hot air pipe; 9. Winding roller; 10. Winding part; 11. Pressing roller; 12. Support roller; 121. Slider; 122. Slide rail; 123. Support spring; 13. Support shaft; 14. Transmission shaft; 15. Driver; 16. Transmission mechanism; 161. Worm member; 162. Worm gear member; 17. Bearing; 18. Linkage ring; 19. One-way linkage mechanism; 191. Linkage disk; 1911. Limit block; 192. Linkage tooth; 1921. Ratchet end; 193. Linkage sleeve; 1931. Ratchet groove. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] This embodiment discloses a tea processing device that plays the role of withering tea leaves. Figure 1-3 Provide detailed explanation.

[0040] The tea processing device includes a withering chamber 1 with an open top. A support belt 3 is installed within the chamber, with the center of the support belt 3 covering the open portion in the withering direction and installed in a generally horizontal position. The upper portion of the support belt 3 is used to stack tea leaves. The support belt 3 is a mesh belt with small holes to prevent tea leaves from falling through.

[0041] The support belt 3 is a flexible long strip structure with good air permeability, which allows hot air to pass through, thereby withering the tea leaves. Two sets of winding rollers 9 are installed on both sides of the withering box 1. The two sets of winding rollers 9 are respectively arranged at the left and right ends of the support belt 3. The two ends of the support belt 3 are respectively connected to the outer periphery of the two sets of winding rollers 9 and are wound by the winding rollers 9. During the winding process of the winding rollers 9, the tea leaves laid on the surface of the support belt 3 will be rolled into the outside of the winding rollers 9, and the support belt 3 will clamp the tea leaves to form a multi-layer stacked structure, thereby being able to squeeze the tea leaves. During the withering process, the tea leaves can be squeezed, and small squeezing and hot air can treat the tea leaves, thereby dissipating some moisture, causing the stems and leaves to wilt, thereby achieving withering.

[0042] A support plate 4 is installed in the withering box 1. The support plate 4 is located below the support belt 3 and has a plurality of ventilation holes extending therethrough. The support plate 4 is tilted, with one side of the support plate 4 in contact with the underside of the support belt 3 and the other side of the support plate 4 gradually widening the gap with the support belt 3.

[0043] The support plate 4 supports the support belt 3. A hot air cavity 100 is formed in the space below the support plate 4. Hot air can enter the hot air cavity 100 and then flow upward through the support plate 4 and the support belt 3 to wither the tea leaves.

[0044] Through the winding action of the winding roller 9, the support belt 3 can be wound around the outer periphery of the winding roller 9 to form a winding portion 10. The support belt 3 at the winding portion 10 is stacked and wound, and the tea leaves can be clamped between adjacent support layers, and the tea leaves can be wound outside the winding roller 9, thereby being able to be wound and extruded.

[0045] A pressure roller 11 is pressed against the bottom of the winding roller 9. The pressure roller 11 presses against the bottom of the winding roller 9, thereby squeezing the bottom of the winding section 10. When the winding section 10 is squeezed, the tea leaves clamped between the support belts 3 are subjected to a certain squeezing force, which applies pressure to the tea leaves during the withering process, thereby appropriately increasing the tea leaves' wilting speed and improving the withering effect.

[0046] The height of the pressing roller 11 can be adjusted up and down. After the winding roller 9 is wound, the thickness of the winding portion 10 wound outside the winding roller 9 will gradually change, and some tea leaves will be placed between the two layers of support belts 3, resulting in an increase in the profile of the winding portion 10 outside the winding roller 9. By adjusting the pressing roller 11 up and down, the pressing roller 11 can adapt to the winding changes of the winding roller 9, ensuring that the pressing roller 11 can always contact the winding portion 10, thereby squeezing the tea leaves in the wound state.

[0047] Reference Figure 3 As shown, sliders 121 are rotatably connected to both ends of the pressure roller 11. The pressure roller 11 can be adjusted to rise and fall as a whole by moving the sliders 121 up and down.

[0048] Slide rails 122 are mounted on the side walls of the withering box 1. Slide blocks 121 are supported by these rails and can be adjusted up and down. This allows the pressure roller 11 to be raised and lowered. Furthermore, a support spring 123 is mounted below the slider 121. The lower end of the support spring 123 is supported by a fixed component, while the upper end presses against the lower portion of the slider 121. This allows the support spring 123 to apply elastic pressure to the slider 121, ensuring that the pressure roller 11 always abuts against the lower side of the rewinding section 10.

[0049] In addition, support rollers 12 are installed on both sides of the withering box 1. The support belt 3 is passed over the support rollers 12. The height of the support rollers 12 is the same as the height of the support belt 3. The height of the support rollers 12 can be adjusted up and down. After adjustment, the height of the support belt 3 can be slightly adjusted so that the support belt 3 can be at a desired height.

[0050] Furthermore, heating boxes 2 are installed on both the left and right sides of the withering box 1, and the winding roller 9, adjusting roller and pressing roller 11 on the corresponding side are all installed in the heating box 2. A channel 201 is opened on the side wall of the heating box 2 facing the withering box 1. The size and position of the channel 201 are adapted to the parameters of the support belt 3, allowing the support belt 3 to pass through. Tea leaves of the same size laid on the upper side of the support belt 3 can also enter the heating box 2 through the channel 201.

[0051] The support belt 3 rolls the tea leaves into the heating box 2. The temperature inside the heating box 2 is relatively high. In the heating box 2, the tea leaves are subjected to the dual effects of heating withering and extrusion withering, thereby being able to achieve withering treatment more efficiently and quickly.

[0052] Reference Figure 1 As shown, hot air pipes 8 are connected to the outer walls of the two heating boxes 2. The hot air pipes 8 are connected to the external hot air source. Dry hot air can be introduced into the heating box 2 through the hot air pipes 8, so that the heating box 2 is in a relatively high temperature environment.

[0053] A ventilation hole 5 is provided between the side wall between the heating box 2 and the hot air chamber 100 . The ventilation hole 5 is located at the lower part of the side wall, and a fan 6 is provided at the ventilation hole 5 . The fan 6 can blow air toward the hot air chamber 100 .

[0054] An air guide protrusion 7 can also be installed at the bottom of the hot air chamber 100. The air guide protrusion 7 can guide the air upward so that the hot air can flow upward after entering the hot air chamber 100, which is conducive to the hot air withering treatment of the tea leaves on the support belt 3.

[0055] Example 2

[0056] This embodiment discloses a tea processing device. Based on the first embodiment, Figure 4-Figure 7 A detailed description is given, mainly focusing on further designing the linkage structure between the two winding rollers 9.

[0057] Reference Figure 4 、 Figure 5 As shown, a support shaft 13 is provided through the middle of the winding roller 9. The winding rollers 9 are rotatably supported by the support shaft 13 and maintained in a state of relative rotation by bearings 17. The two winding rollers 9 can rotate in conjunction with each other to achieve the movement and adjustment of the support belt 3. When the two winding rollers 9 rotate, the winding roller 9 on one side rewinds while the winding roller 9 on the other side unwinds, thereby maintaining a stable state for the support belt 3.

[0058] The support shaft 13 is mounted on the frame through a bearing 17 assembly, so that the support shaft 13 can also rotate independently, forming a structure in which the support shaft 13 and the winding roller 9 are arranged inside and outside and can rotate.

[0059] Reference Figure 5-Figure 7 As shown, the winding roller 9 and the corresponding support shaft 13 are linked by a one-way linkage mechanism 19. When the support shaft 13 rotates in one direction, the support shaft 13 can drive the winding roller 9 to rotate synchronously. When the support shaft 13 rotates in the other direction, the support shaft 13 can rotate freely independently of the winding roller 9. The one-way linkage mechanism 19 can be a one-way ratchet mechanism, and the linkage directions of the one-way linkage mechanisms 19 of the two winding rollers 9 are opposite.

[0060] Specifically, the one-way linkage mechanism 19 includes a linkage disc 191, a linkage sleeve 193, and a plurality of linkage teeth 192. The linkage disc 191 is fixedly connected to the outer periphery of the support shaft 13, and the annular linkage ring 18 is fixedly connected to the end position of the winding roller 9. The linkage sleeve 193 is fixedly connected to the end face of the linkage disc 191, so that the linkage sleeve 193 can support the structure arranged outside the support shaft 13. An annular space is formed between the linkage sleeve 193 and the support shaft 13, and the linkage disc 191 is installed at the inner periphery of the linkage sleeve 193.

[0061] A plurality of linkage teeth 192 are mounted on the outer periphery of the linkage disk 191. The linkage teeth 192 are ratchet-shaped structures, one end of which is rotatably connected via a shaft, and the other end of the linkage teeth 192 is a ratchet end 1921, allowing the linkage teeth 192 to be rotationally adjusted. A plurality of ratchet grooves 1931 are machined and formed on the inner periphery of the linkage sleeve 193. The structure of the ratchet grooves 1931 matches that of the ratchet ends 1921, and the ratchet ends 1921 can be embedded in the ratchet grooves 1931 to form a one-way linkage state. A plurality of limit blocks 1911 are fixed to the linkage disk 191. The limit blocks 1911 correspond one-to-one with the linkage teeth 192. The limit blocks 1911 can be used to limit the rotational range of the linkage teeth 192, thereby restricting the linkage teeth 192 to a ratchet engagement state. When the linkage disk 191 rotates toward one side, the linkage tooth 192 is restricted by the limit block 1911, and the ratchet end 1921 can be embedded in the ratchet groove 1931. The ratchet end 1921 and the ratchet groove 1931 can engage with each other and link, thereby driving the linkage sleeve 193 to rotate, and then driving the winding roller 9 to rotate; when the linkage disk 191 rotates toward the other side, the linkage tooth 192 will rotate because there is no restriction of the limit block 1911, and the ratchet end 1921 slides out of the ratchet groove 1931, and there will be no linkage between the linkage disk 191 and the linkage sleeve 193. The linkage sleeve 193 and the winding roller 9 can both rotate freely to achieve unidirectional movement.

[0062] Reference Figure 4 As shown, the tea processing device in this embodiment also includes a transmission shaft 14, a driver 15 and two sets of transmission mechanisms 16, wherein the transmission shaft 14 is installed horizontally to drive the support shafts 13 on both sides, thereby driving the winding rollers 9 on both sides to move.

[0063] The transmission shaft 14 is driven to rotate by a driver 15, capable of achieving active rotation and capable of both forward and reverse rotation. Two sets of transmission mechanisms 16 are installed between the transmission shaft 14 and the two support shafts 13, and the two ends of the transmission shaft 14 are respectively driven by the two sets of transmission mechanisms 16 and the two support shafts 13.

[0064] The two support shafts 13 are driven separately by two transmission mechanisms 16. Transmission mechanisms 16 are worm gear mechanisms, comprising a worm wheel 162 and a worm 161. The two worm 161 members are fixedly mounted to the transmission shaft 14, while the two worm wheels 162 are fixedly mounted to the two support shafts 13. The meshing of the worm wheels 162 and worm 161 enables transmission between the transmission shaft 14 and the support shafts 13. The rotary driver 15, through the transmission shaft 14 and the two transmission mechanisms 16, drives the two winding rollers 9 to rotate, thereby achieving movement of the two winding rollers 9.

[0065] When the two winding rollers 9 are in motion,

[0066] Specifically, at the left winding roller 9, the structure of the one-way linkage mechanism 19 is as follows: Figure 6 As shown; at the winding roller 9 on the right, the structure of the one-way linkage mechanism 19 is as shown Figure 7 As shown. When the driver 15 drives the transmission shaft 14 to rotate forward, the two sets of transmission mechanisms 16 drive the two support shafts 13 to rotate (for example, both support shafts 13 rotate clockwise), and the linkage disk 191 in the one-way linkage mechanism 19 will rotate synchronously with the support shaft 13. At the left winding roller 9, the one-way linkage mechanism 19 will be in a linkage state, and the linkage teeth 192 will be embedded in the ratchet groove 1931. The support shaft 13 can drive the linkage sleeve 193 to rotate through the linkage disk 191, and then drive the winding roller 9 to rotate. The winding roller 9 can reel up the support belt 3. At the right winding roller 9, the one-way linkage mechanism 19 will be in a non-engaged state, and there will be no linkage between the linkage disk 191 and the linkage sleeve 193. The linkage sleeve 193 can rotate freely; the winding roller 9 on the right will be pulled by the support belt 3 to produce an automatic unwinding action. During the movement of the support belt 3, the winding roller 9 on the winding side actively rotates to apply tension to the support belt 3, while the winding roller 9 on the unwinding side passively rotates, and the winding roller 9 on the unwinding side does not actively unwind, thereby ensuring that the support belt 3 can remain tensioned during the movement and winding process, avoiding excessive unwinding and causing the support belt 3 to become loose, which is conducive to the smooth and stable operation of the support belt 3.

[0067] Example 3

[0068] This embodiment discloses a method for processing cold-brewed black tea, wherein the tea processing steps are freezing, thawing at room temperature, withering, rolling, deblocking, rolling and cutting, fermentation, initial drying, moisture regaining and re-drying.

[0069] The specific parameters are:

[0070] Freezing: Place the fresh summer and autumn tea leaves with the standard of one bud and two or three leaves in an environment of -20℃ and freeze for 12 hours.

[0071] Thawing at room temperature: After the frozen leaves are thawed at room temperature, they can generally be placed in an environment of 20-25 degrees Celsius and remain still until the frozen leaves are thawed.

[0072] Withering: After the frozen leaves are thawed at room temperature, the tea leaves are withered; during the withering process, the tea leaves are placed in the above-mentioned tea processing device for withering. During withering, the tea leaves are laid on the support belt 3, and hot air at 33-40 degrees Celsius is blown towards the tea leaves. The withering time is 3-5 hours.

[0073] Rolling: Use 55 type rolling machine, with the leaf loading amount 1cm to 2cm lower than the rolling drum surface, the rolling time is 75min to 90min, and the rolling rate reaches 95%, which means the rolling is moderate.

[0074] Delumping: Put the rolled leaves into the delumping machine for delumping.

[0075] Kneading and cutting: Put the deblocked tea leaves into the rotor kneading and cutting machine for kneading and cutting.

[0076] Fermentation: Place the rolled and cut tea leaves into a fermentation frame (10cm thick) and place in an environment of 28-32°C with a relative humidity above 95% and good air circulation. Ferment for 3-5 hours, until the leaves are orange-red, translucent, and have a floral and fruity aroma.

[0077] Initial baking: The initial baking temperature should be 95℃~105℃, the time should be 10min~15min, and the moisture content should be 20%~10%.

[0078] Rehydration: Spread the initially baked tea leaves thinly on bamboo mats, bamboo strips and other equipment. The thickness is generally 2cm to 3cm, and the time is about 2 hours.

[0079] Repeat drying: Temperature 70℃~80℃, spread leaves 3cm~5cm thick, stir every half hour, time 1.5h~2h, bake until moisture content is below 6%. Cool to room temperature before packaging and storage.

[0080] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A tea processing device comprising a withering box (1), characterized in that: The top of the withering box (1) is open, and a support belt (3) is provided in the withering box (1), and the upper part of the support belt (3) is used for stacking tea leaves. A support plate (4) is provided in the withering box (1), and the support plate (4) is located below the support belt (3) and is provided with a plurality of air holes running through the upper and lower parts; a hot air cavity (100) is formed at the lower part of the support plate (4); the support belt (3) is a flexible long strip structure, and further comprises two groups of winding rollers (9), the two groups of winding rollers (9) are respectively provided at the left and right ends of the support belt (3), and the two ends of the support belt (3) are respectively connected to the outer periphery of the two groups of winding rollers (9), and are wound by the winding rollers (9); The support belt (3) can be wound around the outer periphery of the winding roller (9) to form a winding portion (10), and the support belts (3) at the winding portion (10) are stacked and wound, and tea leaves can be clamped between adjacent support layers; Heating boxes (2) are provided at both left and right ends of the withering box (1), and two winding rollers (9) are respectively provided in the two heating boxes (2).

2. A tea processing device according to claim 1, characterized in that: The lower part of the winding roller (9) is pressed against a pressure roller (11), and the height of the pressure roller (11) can be adjusted up and down; both ends of the pressure roller (11) are rotatably connected to sliders (121), and the sliders (121) are slidably supported by slide rails (122) and can be slidably adjusted up and down, and the lower part of the slider (121) is elastically supported by a support spring (123).

3. A tea processing device according to claim 2, characterized in that: A support roller (12) is provided between the winding roller (9) and the withering box (1), the support belt (3) passes around the upper side of the support roller (12), and the height of the support roller (12) can be adjusted up and down.

4. A tea processing device according to claim 1, characterized in that: The heating box (2) is provided with a channel (201) on the side wall facing the withering box (1), and the channel (201) is for the support belt (3) to pass through.

5. A tea processing device according to claim 4, characterized in that: A ventilation hole (5) is provided between the side walls of the heating box (2) and the hot air chamber (100), and a blower (6) is provided at the ventilation hole (5), and the blower (6) is capable of sending air into the hot air chamber (100); the heating box (2) is connected to a hot air pipe (8), and the hot air pipe (8) is used to pass dry hot air into the heating chamber; The support plate (4) is arranged at an angle, one side of the support plate (4) contacts the lower side of the support belt (3), and the gap between the other side and the support belt (3) gradually expands.

6. A tea processing device according to claim 1, characterized in that: The winding roller (9) is rotationally supported by a support shaft (13), and the two winding rollers (9) can rotate in coordination with each other to realize the movement and adjustment of the support belt (3); the winding roller (9) is rotationally connected to the support shaft (13) through a bearing (17); and the device further includes a transmission shaft (14), a driver (15) and two sets of transmission mechanisms (16); the transmission shaft (14) is driven to rotate by the driver (15), and the transmission shaft (14) drives the two support shafts (13) respectively through the two sets of transmission mechanisms (16).

7. A tea processing device according to claim 6, characterized in that: The transmission mechanism (16) is a worm gear mechanism, comprising a worm gear (162) and a worm gear (161); the worm gear (161) is fixedly mounted on the transmission shaft (14); the worm gear (162) is fixedly mounted on the support shaft (13); the worm gear (162) and the worm gear (161) are meshed with each other to achieve transmission between the transmission shaft (14) and the support shaft (13).

8. A tea processing device according to claim 6, characterized in that: The winding roller (9) and the corresponding support shaft (13) are linked via a one-way linkage mechanism (19); when the support shaft (13) rotates in one direction, the support shaft (13) can drive the winding roller (9) to rotate synchronously; when the support shaft (13) rotates in the other direction, the support shaft (13) can rotate freely independently of the winding roller (9); the one-way linkage mechanism (19) is a one-way ratchet mechanism, and the linkage directions of the one-way linkage mechanisms (19) of the two winding rollers (9) are opposite.

9. A method for processing cold-brew black tea, characterized in that: The method comprises the following steps: freezing, thawing at room temperature, withering, rolling, deblocking, rolling and cutting, initial baking, moisture regaining and re-baking. During the withering process of the tea leaves, the tea processing device according to any one of claims 1 to 8 is used.

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