阅读说明：本技术 静态吸附茶鲜叶处理机及利用该处理机处理茶鲜叶的方法 (Static adsorption fresh tea leaf processor and method for processing fresh tea leaves by using processor ) 是由 邓余良 袁海波 李佳 江用文 杨艳芹 滑金杰 王近近 于 2020-04-26 设计创作，主要内容包括：本发明属于茶叶加工领域,具体涉及静态吸附茶鲜叶处理机及利用该处理机处理茶鲜叶的方法,包括机架,机架上设置输送装置和旋转装置,旋转装置包括转动配合于机架上的支撑架、用于驱动支撑架翻转的翻转驱动机构、转动配合于支撑架上的吸附架及用于驱动吸附架旋转的旋转驱动机构,吸附架上设置多个吸附板。本发明无需调节环境的温湿度、无需调节风速和风量、也无需翻动鲜叶即可完成茶鲜叶的处理过程,制冷、制热、鼓风、等措施都是非必要的条件,在整个茶鲜叶处理过程中,茶鲜叶和吸附板材之间完全处于静置状态,不会损伤茶鲜叶,而导致茶鲜叶红变,具有显著的先进性。(The invention belongs to the field of tea processing, and particularly relates to a static adsorption fresh tea processing machine and a method for processing fresh tea by using the same. The fresh tea leaf processing method can complete the processing process of the fresh tea leaves without adjusting the temperature and humidity of the environment, adjusting the air speed and the air quantity and turning the fresh tea leaves, measures such as refrigeration, heating, air blast and the like are unnecessary conditions, and in the whole processing process of the fresh tea leaves, the fresh tea leaves and the adsorption plates are completely in a standing state, so that the fresh tea leaves are not damaged, the fresh tea leaves are not subjected to red change, and the method has remarkable advancement.)

1. A static fresh tea leaf adsorption treatment machine is characterized by comprising a rack (1), wherein a conveying device and a rotating device are arranged on the rack (1), the rotating device comprises a support frame in rotating fit with the rack (1), a turnover driving mechanism used for driving the support frame to turn over, an adsorption frame in rotating fit with the support frame and a rotating driving mechanism (16) used for driving the adsorption frame to rotate, and a plurality of adsorption plates (2) are arranged on the adsorption frame.

2. The machine for processing fresh tea leaves according to claim 1, characterized in that the adsorption frame comprises an adsorption frame rotating shaft (3) which is in transmission fit with a rotary driving mechanism (16), support rod groups are arranged at two ends of the adsorption frame rotating shaft (3), each support rod group comprises a plurality of support rods (4) which are uniformly arranged around the axis of the adsorption frame rotating shaft (3), each support rod (4) is in rotation fit with a horizontally arranged adsorption plate (2), each adsorption plate (2) is in rotation fit with a circular track (5) arranged on the support frame, each adsorption plate (2) can move along the circular track (5), the length of each support rod (4) is equal to the radius of the circular track (5), the axis of the adsorption frame rotating shaft (3) and the circle center of the circular track (5) are at the same height position, two adjacent adsorption plates (2) are pairwise, and a first connecting rod (14) is in rotation fit between the two paired adsorption plates (2), the adsorption plate (2) is a diatom adsorption plate.

3. The machine for treating fresh tea leaves according to claim 2, characterized in that the support frame comprises a left and a right mounting seats (6) which are rotatably fitted with the frame (1), the inner end surfaces of the two mounting seats (6) are respectively provided with a circular track (5), the rotary shaft (3) of the adsorption frame is rotatably fitted between the two mounting seats (6), the rotary driving mechanism (16) is mounted on one of the mounting seats (6), and the rotary driving mechanism (16) is a motor.

4. The machine for processing fresh tea leaves according to claim 1, wherein the machine frame (1) is further provided with a stroke sensor (7) for sensing whether the adsorption plate (2) reaches the upper end position, a moisture meter (8) for detecting the moisture content of the fresh tea leaves and an object sensor (9) for detecting whether the adsorption plate (2) is full of the fresh tea leaves.

5. The machine for treating fresh tea leaves according to claim 4, characterised in that the stroke sensor (7) is a proximity switch, the moisture meter (8) is an infrared moisture meter and the object sensor (9) is a correlation infrared emitter.

6. Machine for treating fresh tea leaves with static adsorption according to any one of claims 1 to 5, characterized in that the overturning driving mechanism comprises a pusher mechanism (10) rotatably coupled to the frame (1), a second connecting rod (11) rotatably coupled to the output shaft of the pusher mechanism (10), the second connecting rod (11) being in driving engagement with the support frame.

7. The machine for treating fresh tea leaves according to any one of claims 1 to 5, wherein the conveyor means comprise a feeding opening (15) provided in the frame (1), a conveyor belt (12) provided at the feeding opening (15) and a leaf homogenizer (13), the leaf homogenizer (13) being positioned at the upper end of the conveyor belt (12).

8. A method of processing fresh tea leaves using a processor as claimed in any one of claims 1 to 7, comprising

1) Placing a static fresh tea leaf adsorption processor in a proper fresh tea leaf treatment environment to avoid direct sunlight;

2) starting a power supply of a static fresh tea leaf adsorption processor, and starting a conveying device and a rotating device to work;

3) pouring the fresh tea leaves into a conveying device, conveying the fresh tea leaves onto an adsorption plate (2) of a rotating device through the conveying device, and adsorbing and drying the fresh tea leaves on the adsorption plate (2);

4) fresh tea leaves on the adsorption plates (2) are induced by the object inductor (9), and when the fresh tea leaves received by all the adsorption plates (2) are sufficient, the conveying device automatically stops conveying;

5) rotary device continues to rotate, and whenever there is adsorption plate (2) to trigger stroke inductor (7), infrared moisture meter (8) just detect the fresh tea leaf on this adsorption plate (2), when X detects the moisture content of the fresh tea leaf and reaches the requirement in succession, upset drive arrangement drives the support frame upset, makes adsorption plate (2) become the vertical state, the fresh tea leaf ejection of compact, wherein, X is the quantity of adsorption plate (2).

9. The method for processing fresh tea leaves as claimed in claim 7, wherein in the step 4), when the fresh tea leaves on one of the adsorption plates (2) reach a sufficient thickness and rise to the highest position, the fresh tea leaves shield an object sensor (9) horizontally arranged at the upper end of the adsorption shelf, and the conveying device stops conveying the tea leaves immediately.

10. The method for processing fresh tea leaves according to claim 7, wherein in the step 2), when the static fresh tea leaf adsorption processor is started, the conveying device is adjusted to be slow, the rotating device is adjusted to be 5-10 r/min, and the diatomite adsorption plate is cleaned by a hand-held blower or an oil-free air compressor; in the step 3), the speed of the conveying device and the rotating device is adjusted according to the thickness of the fresh tea leaves falling on the adsorption plate (2), and the thickness of the fresh tea leaves is controlled to be 1-4 cm.

Technical Field

The invention belongs to the field of tea processing, and particularly relates to a static adsorption fresh tea leaf processor and a method for processing fresh tea leaves by using the processor.

Background

The processing of green tea, yellow tea, green tea and the like needs to be carried out by spreading fresh leaves, the processing of black tea, white tea and the like needs to wither the fresh leaves, the spreading and withering of the fresh tea leaves can hydrolyze part of water-insoluble protein in the fresh leaves into free amino acid, and the amino acid is a main substance component for forming the taste and aroma of tea products, so that the freshness and aroma of the tea products can be obviously improved, energy can be saved, the production efficiency can be improved, and the production cost can be saved, therefore, the processing of the fresh tea leaves is a very key process in the tea processing process.

At present, all fresh tea leaf processing modes adopt measures of adjusting the temperature and humidity of air or adjusting the air speed and the air quantity, refrigeration equipment, heating equipment, air blowing equipment and conveying equipment must be put into, the cost is high, the fresh tea leaves cannot be turned in the fresh tea leaf processing process, the damage to the leaf edges or the bud tips of the fresh tea leaves is easy to cause, and the phenomena of burning edges, burning buds and the like of the fresh tea leaves are generated.

In order to solve the above problems, the applicant proposed a static adsorption fresh tea leaf treatment machine and a method for treating fresh tea leaves.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides a static adsorption fresh tea leaf processor and a technical scheme of a method for processing fresh tea leaves by using the processor.

The machine is characterized by comprising a rack, wherein a conveying device and a rotating device are arranged on the rack, the rotating device comprises a support frame in rotating fit with the rack, a turnover driving mechanism used for driving the support frame to turn over, an adsorption frame in rotating fit with the support frame and a rotating driving mechanism used for driving the adsorption frame to rotate, and a plurality of adsorption plates are arranged on the adsorption frame.

Static fresh tea leaf processor that adsorbs, its characterized in that adsorbs the frame include with rotary driving mechanism transmission complex adsorb frame pivot, the both ends of adsorbing the frame pivot set up the bracing piece group, the bracing piece group includes a plurality of bracing pieces around adsorbing frame pivot axle center evenly arranged, the adsorption plate normal running fit that bracing piece and level set up, the adsorption plate with set up the circular track normal running fit on the support frame, and the adsorption plate can move along circular track, the length of bracing piece equals with circular track radius, adsorb frame pivot axle center and circular track centre of a circle and be in same high position, two adjacent adsorption plates are two liang in pairs, the first connecting rod of normal running fit between two mated adsorption plates, the adsorption plate is the diatom adsorption plate.

The machine is characterized in that the support frame comprises a left mounting seat and a right mounting seat which are in running fit with the frame, the inner end faces of the two mounting seats are respectively provided with a circular track, a rotating shaft of the adsorption frame is in running fit between the two mounting seats, and the rotary driving mechanism is mounted on one of the mounting seats and the rotary driving mechanism.

The static fresh tea leaf adsorption treatment machine is characterized in that a stroke sensor used for sensing whether the adsorption plate reaches the upper end position, a moisture tester used for detecting the moisture content of the fresh tea leaves and an object sensor used for detecting whether the adsorption plate is full of the fresh tea leaves are further arranged on the rack.

The static fresh tea leaf adsorption processor is characterized in that the stroke sensor is a proximity switch, the moisture meter is an infrared moisture meter, and the object sensor is a correlation infrared transmitter.

The machine is characterized in that the turnover driving mechanism comprises a push rod mechanism which is in running fit with the frame, and a second connecting rod which is in running fit with an output shaft of the push rod mechanism, and the second connecting rod is in running fit with the supporting frame.

The machine is characterized in that the conveying device comprises a feeding port arranged on the frame, a conveying belt arranged on the feeding port and a leaf homogenizing device, and the leaf homogenizing device is positioned at the upper end of the conveying belt.

The method for processing fresh tea leaves by using the processor is characterized by comprising the following steps

1) Placing a static fresh tea leaf adsorption processor in a proper fresh tea leaf treatment environment to avoid direct sunlight;

2) starting a power supply of a static fresh tea leaf adsorption processor, and starting a conveying device and a rotating device to work;

3) pouring the fresh tea leaves into a conveying device, conveying the fresh tea leaves onto an adsorption plate of a rotating device through the conveying device, and adsorbing and drying the fresh tea leaves on the adsorption plate;

4) fresh tea leaves on the adsorption plates are induced by the object inductor, and when the fresh tea leaves received by all the adsorption plates are sufficient, the conveying device automatically stops conveying;

5) rotating device continues to rotate, and whenever there is the adsorption plate to trigger the stroke inductor, infrared moisture meter just detects the bright leaf of tea on this adsorption plate, and when X detects the moisture content of the bright leaf of tea and reaches the requirement in succession, upset drive arrangement drives the support frame upset, makes the adsorption plate become the vertical state, the bright leaf ejection of compact of tea, wherein, X is the quantity of adsorption plate.

The method for processing the fresh tea leaves is characterized in that in the step 4), when the fresh tea leaves on one adsorption plate reach enough thickness and rise to the highest position, the fresh tea leaves shield an object sensor horizontally arranged at the upper end of the adsorption frame, and the conveying device stops conveying the tea leaves immediately.

The method for treating the fresh tea leaves is characterized in that in the step 2), when a static fresh tea leaf adsorption processor is started, a conveying device is adjusted to be slow, a rotating device is adjusted to be 5-10 r/min in rotating speed, and a diatomite adsorption plate is cleaned by a hand-held air blower or an oil-free air compressor; and 3) adjusting the speed of the conveying device and the rotating device according to the thickness of the fresh tea leaves falling on the adsorption plate, and controlling the thickness of the fresh tea leaves to be 1-4 cm.

Compared with the prior art, the invention is a process of directly spreading the fresh tea leaves on a sanitary material with water adsorption property, and transferring the water of the fresh tea leaves to the adsorption material through the vein tissue of the fresh tea leaves by utilizing the static contact of the adsorption property of the adsorption material and the fresh tea leaves. Has the advantages that: the fresh tea leaves can be treated without adjusting the temperature and humidity of the environment, the air speed and the air quantity and turning over the fresh tea leaves, measures such as refrigeration, heating, blast and the like are unnecessary conditions, and the fresh tea leaves can be treated by combining the temperature and humidity adjustment of the environment. In the whole fresh tea leaf treatment process, the fresh tea leaves and the adsorption plates are completely in a standing state, so that the fresh tea leaves are not damaged, and the fresh tea leaves are red and changed, and the method has remarkable advancement.

Drawings

FIG. 1 is a schematic view of the static adsorption fresh tea leaf processor of the present invention;

FIG. 2 is a left side view schematically illustrating the structure of the adsorption frame of the present invention;

FIG. 3 is a schematic view of the position relationship between the object sensor and the adsorption plate according to the present invention;

FIG. 4 is a schematic view of the structure of the conveying device of the present invention;

FIG. 5 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in the figure, the static fresh tea leaf adsorbing treatment machine comprises a frame 1, wherein a conveying device and a rotating device are arranged on the frame 1, the rotating device comprises a support frame in rotating fit with the frame 1, a turnover driving mechanism used for driving the support frame to turn over, an adsorption frame in rotating fit with the support frame and a rotating driving mechanism 16 used for driving the adsorption frame to rotate, and a plurality of adsorption plates 2 are arranged on the adsorption frame.

The adsorption plate 2 in the present invention is a diatom adsorption plate. Diatomaceous earth is a biogenic siliceous sedimentary rock consisting primarily of remains of ancient diatoms. The chemical composition of which is SiO₂Mainly, SiO can be used₂·nH₂O represents opal and its variant. The density of the diatomite is 1.9-2.3 g/cm³Bulk density of 0.34-0.65 g/cm³The specific surface area is 40-65 square meters per gram, the pore volume is 0.45-0.98 cm/g, the water absorption is 2-4 times of the self volume, the melting point is 1650C-1750 ℃, and a special porous structure can be observed under an electron microscope.The diatomite is white, grey, light brown and the like, and has the properties of fineness, looseness, light weight, porosity, water absorption and strong permeability. The application of the diatomite has the advantages of 1: the diatomite as one kind of indoor and outdoor paint and wall material has silica as main component, and has superfine pores 5000-6000 times greater than that of charcoal. When the indoor humidity rises, the ultramicropores on the diatomite wall material can automatically absorb the moisture in the air and store the moisture.

The specific structure of support frame: the support frame includes about two and frame 1 normal running fit's mount pad 6, and mount pad 6 is the round plate-shaped structure, and the outer terminal surface of mount pad 6 sets up the main shaft, and the main shaft rotates and installs in the frame, and the interior terminal surface of two mount pads 6 all has circular track 5, adsorbs frame pivot 3 to rotate to insert and join in marriage between two mount pads 6, and rotary driving mechanism 16 installs in the outer terminal surface of one of them mount pad 6, and rotary driving mechanism 16 is gear motor. In addition, the two mounting seats 6 can be fixed by a cross bar to enhance the structural stability.

The specific structure of the adsorption rack is as follows: the adsorption rack comprises an adsorption rack rotating shaft 3 in transmission fit with a rotary driving mechanism 16, supporting rod groups are arranged at two ends of the adsorption rack rotating shaft 3, each supporting rod group comprises 6 supporting rods 4 uniformly arranged around the axis of the adsorption rack rotating shaft 3, two corresponding supporting rods 4 in the two groups of supporting rod groups are in rotation fit with two sides of a corresponding adsorption plate 2, two sides of each adsorption plate 2 are in rotation fit with two circular tracks 5 respectively, the length of each supporting rod 4 is equal to the radius of the circular track 5, the axis of the adsorption rack rotating shaft 3 is located at the same height position with the center of the circular track 5, every two adjacent adsorption plates 2 are paired, and a first connecting rod 14 in rotation fit is arranged between the two paired adsorption plates 2. It should be added that both sides of the adsorption plate 2 are provided with cranks 16, a first short shaft of a sleeve at one end of each crank 16 is rotationally matched with the corresponding support rod 4, a second short shaft of a sleeve at the other end is rotationally matched with the circular track 5, the circular track 5 is a circular groove, the second short shaft is inserted into the groove, and the second short shaft can rotate in the circular track 5 and slide along the track. The "length of the support rod 4 is equal to the radius of the circular track 5" only means the shortest distance from the axis of the rotating shaft 3 of the absorption frame to the first short shaft, and the two ends of the support rod 4 may have extension parts, and the length of the extension parts is not counted. Because the length of 6 support rods 4 in each support rod group is the same, the support rods form a circle with the adsorption frame rotating shaft 3 as the center, the radius of the circle is the same as that of the circular track 5, and the height position is also the same, assuming that the shortest line from the circle center of the circular track 5 to the first short shaft is a, the shortest line from the circle center of the circular track 5 to the center of the adsorption frame rotating shaft 3 is b, the support rod 4 is a line c, and the crank is a line d, the lines a, b, c and d form a stable parallelogram, and because the line b is always horizontal, the line d is also always horizontal, namely, the adsorption plate 2 is always horizontal.

The specific process that the rotary driving mechanism drives the adsorption frame to rotate is as follows: the rotary driving mechanism drives the adsorption frame rotating shaft 3 to rotate, the adsorption frame rotating shaft 3 drives the supporting rod 4 thereon to rotate, the supporting rod 4 drives the adsorption plate 2 to move along the circular track 5 through the driving crank 16, and the adsorption plate 2 can be always kept in a horizontal state due to the parallelogram structure.

The specific structure of the overturning driving mechanism is as follows: the overturning driving mechanism comprises a push rod mechanism 10 in rotating fit with one side of the rack 1 and a second connecting rod 11 in rotating fit with an output shaft of the push rod mechanism 10, and the second connecting rod 11 is fixedly matched with a main shaft on the outer end face of the corresponding mounting seat 6. The push rod mechanism 10 can be selected from an air cylinder, a hydraulic cylinder or an electric push rod.

The conveying device comprises a feeding port 15 arranged on the frame 1, a conveying belt 12 arranged on the feeding port 15 and a leaf homogenizing device 13, and the leaf homogenizing device 13 is positioned at the upper end of the conveying belt 12. Wherein even leaf ware 13 includes the motor, with even leaf axle of motor transmission complex and a plurality of even blades that set up in even leaf epaxial, the motor drives even epaxial even blade of even leaf and rotates, can evenly allocate the fresh tea leaf, avoids fresh tea leaf to pile up the excessive thickness.

In order to make the use of the static fresh tea leaf adsorption processor more convenient, the following optimization is carried out: the rack 1 of the invention is also provided with a stroke sensor 7 for sensing whether the adsorption plate 2 reaches the upper end position, a moisture tester 8 for detecting the moisture content of the fresh tea leaves, an object sensor 9 for detecting whether the adsorption plate 2 is full of the fresh tea leaves, a controller for controlling and an operation panel for controlling. Wherein, proximity switch is selected for use to stroke inductor 7, and proximity switch position adsorption plate 2 highest position's rear side, infrared moisture meter is selected for use to moisture meter 8, and infrared moisture meter is located the upper end of 2 highest positions of adsorption plate, and correlation formula infrared transmitter is selected for use to object inductor 9, and correlation formula infrared transmitter is located adsorption plate highest position upper end 1cm, and is located the left and right sides of adsorption plate highest position, and PLC is selected for use to the controller.

In addition, the static adsorption fresh tea leaf processor of the invention is also provided with a collection guide plate 17 at the bottom of the frame for collecting the fresh tea leaves falling from the adsorption plate 2.

When fresh tea leaves are put in, the PLC sends a speed regulation instruction to the servo motor of the conveyor belt 12 and the rotary driving mechanism 16, the conveyor belt 12 is regulated to be at a slow speed, the rotating speed of the rotating device is regulated to be 5-10 r/min, fine adjustment is carried out according to the required thickness of the fresh leaves, the spreading thickness of the fresh leaves is generally 1-4 cm, when the 1 st adsorption plate is about to be full of the fresh leaves, the next adsorption plate 2 is rotated to the upper part of the 1 st adsorption plate 2, namely, the distribution of the second plate is started, when the 6 adsorption plates 2 are full of the fresh tea leaves, the fresh tea leaves shield the correlation infrared transmitter horizontally arranged at the height of 1cm at the highest position of the adsorption plate 2, the PLC immediately gives an instruction of stopping to the servo motor of the conveyor belt 12, the rotating device continues to start to rotate at a slow speed, and can also properly regulate the rotating speed to accelerate the evaporation of; the infrared moisture meter arranged at the uppermost part is controlled by a proximity switch, when one adsorption plate 2 rotates to the uppermost part, the moisture content (generally, 70% of green tea, 70% of yellow tea, 60% of black tea and 30% of white tea) of fresh tea leaves is measured once, when the moisture content is continuously detected for 6 times to meet the requirement, the fresh tea leaves on the 6 adsorption plates 2 are all processed, the PLC immediately instructs the push rod mechanism 10 to work, the push rod mechanism 10 pushes the second connecting rod 11 to drive the mounting seat 6 to turn over for 90 degrees, the adsorption plate 2 is immediately changed from a horizontal state to a vertical state, the fresh tea leaves fall down, enter the material receiving frame along with the collection guide plate 17, and move to the next process for processing.

A method for processing fresh tea leaves by adopting the processor comprises the following steps:

1) placing a static adsorption tea fresh leaf processor in a proper fresh leaf processing environment to avoid direct sunlight, wherein the natural environment temperature of common green tea and yellow tea is 15-30 ℃, and the humidity is 50-80%; black tea is 25-36 ℃ and humidity is 50-75%; the temperature and the humidity of the white tea are 25-32 ℃, and the humidity is 65-75%;

2) starting a static fresh tea leaf adsorption processor, adjusting the speed of a conveying device to be low, adjusting the rotation speed of a rotating mechanism to be 5-10 r/min, and cleaning a diatomite adsorption plate by using a hand-held air blower or an oil-free air compressor;

3) pouring picked fresh tea leaves into a conveying device, conveying the fresh tea leaves onto an adsorption plate 2 of a rotating device through the conveying device, adsorbing and drying the fresh tea leaves on the adsorption plate 2 by the adsorption plate, adjusting the speed of the conveying device and the rotating device according to the thickness of the fresh tea leaves falling on the adsorption plate 2, and controlling the thickness of the fresh tea leaves to be 1-4 cm;

4) fresh tea leaves on the adsorption plates 2 are induced by the object inductor 9, and when the fresh tea leaves received by all the adsorption plates 2 are sufficient, the conveying device automatically stops conveying;

5) the rotating device continues to rotate, whenever the adsorption plate 2 triggers the stroke sensor 7, the infrared moisture meter 8 detects fresh tea leaves on the adsorption plate 2, and when the moisture content of the fresh tea leaves is detected for X times continuously, the turnover driving device drives the supporting frame to turn over, so that the adsorption plate 2 is in a vertical state, and the fresh tea leaves are discharged, wherein X is the number of the adsorption plates 2;

6) cleaning the diatomite adsorption plate by using a hand-held air blower or an oil-free air compressor, and placing the static fresh tea adsorption processor in a dry and ventilated place for the next use.

In the step 4), when the fresh tea leaves on one adsorption plate (2) reach enough thickness and rise to the highest position, the fresh tea leaves shield an object sensor (9) horizontally arranged at the upper end of the adsorption frame, and the conveying device immediately stops conveying the tea leaves.

The fresh tea leaf processing method controls the fresh tea leaf processing time by utilizing temperature and humidity, when green tea, yellow tea, green tea and black tea are processed, the fresh tea leaf processing time is controlled to be 6-18 h, when white tea is processed, the fresh tea leaf processing time is controlled to be 36-72 h, and fresh tea leaves cannot be turned over in the period; wherein, when green tea, yellow tea and green tea are processed, the fresh tea leaves are withered, the color of the tea leaves is changed from fresh green to dark green, the luster is lost, and the water content is reduced to 70 percent, so that the spreading process of the fresh tea leaves is completed; when the black tea is processed, the fresh tea leaves are withered to become more heavy, the color of the tea leaves is changed from fresh green to dark green, the luster is lost, and the withering process of the fresh tea leaves is finished when the water content reaches 60%; when white tea is processed, fresh tea leaves are withered to become plump, the color of the tea leaves is changed from fresh green to grey green, the luster of the tea leaves is lost, and the withering process of the fresh tea leaves is completed when the water content reaches 35 percent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.