CN112197509A - Pneumatic tea leaf drying method - Google Patents
Pneumatic tea leaf drying method Download PDFInfo
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- CN112197509A CN112197509A CN202010997470.5A CN202010997470A CN112197509A CN 112197509 A CN112197509 A CN 112197509A CN 202010997470 A CN202010997470 A CN 202010997470A CN 112197509 A CN112197509 A CN 112197509A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/20—Teas, i.e. drying, conditioning, withering of tea leaves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a pneumatic tea drying method, relating to the technical field of tea processing devices and comprising a drying box, an air chamber is arranged at the inner side of the drying box, a feed inlet is arranged at one side of the top of the drying box, which is close to the air chamber, the input end of the air chamber is communicated with an external hot air source, the output end of the air chamber is communicated with the drying box, a wind regulating wheel is coaxially and rotatably connected in the air chamber, the wind wheel comprises a rotating shaft, a fixed plate, a sealing arc plate and a centrifugal spring, the rotating shaft is coaxially and rotatably connected in the air chamber, the rotating shaft is coaxially and fixedly connected with a plurality of fixing plates and is rotatably connected with a plurality of sealing arc plates, the external hot air source introduces hot air for drying into the air chamber, the hot air flows into the air cavity through the air chamber and permeates into the tea leaves on the surface of the floating plate from the air holes on the air pocket of the floating plate, drying tea leaves can effectively avoid the problem that tea leaves are piled up to lead to the bottom that the tea leaf drying effect is not good.
Description
Technical Field
The invention relates to the technical field of tea processing devices, in particular to a pneumatic tea drying method.
Background
In tea production course of working, it is one of key step in the course of working to dry in order to reduce the moisture in the tealeaves to tealeaves, traditional tealeaves stoving mode generally adopts the manual work to turn over the stir-fry, comparatively hard and production efficiency is lower, and the manual work turns over the stir-fry and damages tealeaves easily and bring the pollution, also there is drying device now to carry out the stoving of tealeaves through the cooperation of stoving frame and air heater, but tealeaves piles up and is unfavorable for carrying out even stoving to tealeaves on the frame of drying, need turn in real time, staff's work burden has been improved, drying efficiency is low, the stoving effect is poor. Meanwhile, after tea leaves are dried, tea leaves in the tea leaves generally need to be screened, so that the quality of the tea leaves is improved, the tea leaves cannot be effectively screened by the drying device matched with the drying rack and the air heater, and screening equipment needs to be additionally arranged to work.
Disclosure of Invention
The invention provides a pneumatic tea leaf drying method, and aims to solve the problem that tea leaves are accumulated on a drying rack to be unfavorable for uniformly drying the tea leaves when the drying rack and a drying device matched with a hot air fan in the prior art are used for drying the tea leaves.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pneumatic tea leaf drying method comprises the following specific steps:
s1, placing the tea leaves on a floating plate in the drying box through a feed inlet; (ii) a
S2, starting an external hot air source to introduce hot air for drying into the air chamber;
s3, redistributing hot air entering the air chamber by the air conditioning wheel in the air chamber and pumping air to the gap in the air chamber;
s4, drying the tea leaves on the floating plate of the air hole box on the floating plate by hot air flow in the air cavity;
s5, in the air pumping gap of the air turbine, the buffer spring drives the floating plate to vibrate to form moving and gathering tea leaves, and tea leaves are sieved into the air cavity through the air holes and flushed into the collection bin along with the next air pumping;
the pneumatic tea leaf drying method further relates to a drying device, the drying device comprises a drying box, an air chamber is formed in the drying box, a feed inlet is formed in one side, close to the air chamber, of the top of the drying box, the input end of the air chamber is communicated with an external hot air source, the output end of the air chamber is communicated with the inside of the drying box, a wind shaping wheel is coaxially and rotatably connected with the inside of the air chamber, the wind shaping wheel comprises a rotating shaft, a fixing plate, sealing arc plates and a centrifugal spring, the rotating shaft is coaxially and rotatably connected with the inside of the air chamber, the fixing plates are coaxially and fixedly connected with the rotating shaft, one ends, far away from the rotating shaft, of the sealing arc plates are slidably connected onto the fixing plates in a one-to-one correspondence mode, communication holes are formed;
a floating plate is rotatably connected to one side, away from the air chamber, of the drying box, a discharge port is formed in one end, away from the air chamber, of the drying box, the bottom of the discharge port is flush with the upper surface of the floating plate, the floating plate is inclined downwards and points to the discharge port, an air cavity is formed between the bottom side of the floating plate and the bottom of the drying box, the output end of the air chamber is communicated with the air cavity, a plurality of air cells are formed in the upper surface of the floating plate, a plurality of air holes are formed in the bottoms of the air cells, the bottoms of the air holes are communicated with the air cavity, and a collection;
the floating plate is close to air chamber one end fixedly connected with buffer spring, buffer spring keeps away from floating plate one end fixed connection on the stoving incasement lateral wall, sealed arc board is kept away from pivot one end and is embedded to have the magnetic path, magnetic path and buffer spring magnetic coordination.
Preferably, the air chamber is cylindrical, and the diameter of the air chamber is consistent with the maximum diameter of the wind turbine.
Preferably, the sealing arc plate comprises a straight plate and an arc plate, wherein two ends of the straight plate are respectively connected to the rotating shaft in a rotating mode and fixedly connected to one side of the arc plate, the curvature of the arc plate is consistent with that of the inner periphery of the air chamber, and the straight plate is located in front of the fixing plate in the rotating direction.
Compared with the prior art, the invention has the following beneficial effects:
1. when the tea leaf drying machine dries tea leaves, hot air for drying is introduced into the air chamber from an external hot air source, hot air enters the air chamber through the air chamber and penetrates into the tea leaves on the surface of the floating plate from the air holes in the air pockets of the floating plate to dry the tea leaves, and the problem that the tea leaf drying effect at the bottom is poor due to tea leaf accumulation can be effectively solved.
2. According to the invention, when hot air flows through the air chamber, the air regulating wheel is driven to rotate, when the flow rate of the hot air is high, the rotating speed of the air regulating wheel is high, under the action of high-speed centrifugation, the centrifugal spring is pulled by the sealing arc plate in the air regulating wheel and is far away from the fixed plate, hot air between two adjacent fixed plates enters between the sealing arc plate and the fixed plate through the communicating hole on the sealing arc plate, and then the hot air pumped into the air chamber is reduced; when the flow rate of hot air is low, under the action of low-speed centrifugation, the centrifugal spring pulls the sealing arc plate to be close to the fixed plate, so that hot air pumped into the air cavity is increased; the whole wind wheel redistributes the hot air flow, which is beneficial to keeping the balance of the circulation of the hot air flow pumped into the air cavity and improving the uniformity of drying the tea.
3. In the rotating process of the wind wheel, the magnetic block on the fixed plate continuously rotates to pass through the buffer spring fixedly connected with one end of the floating plate, the buffer spring is contracted under the electromagnetic induction effect of a changing magnetic field generated by the movement of the magnetic block, so that the floating plate is pulled to move downwards, tea leaves on the floating plate lag behind the falling of the floating plate at the moment, and the empty tea leaves are dried under the pumping effect of the wind wheel, so that the tea leaves are heated and dried in a dispersing and rotating mode, and the drying effect is improved.
4. When the air gap of the air wheel pump is formed, the floating plate is subjected to the residual vibration effect of the buffer spring, and the floating plate is inclined downwards to point to the discharge hole, so that the moving effect on tea is formed, and the dried tea is favorably discharged; meanwhile, the tea leaves on the surface of the floating plate are gathered near the air pocket, and the next air pumping is convenient for drying; and the small tea residues can enter the air cavity from the air holes in the air nest, and are brought into the collection bin by the air flow when the air is pumped next time, so that the tea residues are screened and collected.
Drawings
FIG. 1 is a schematic view of the structure and the low-speed flow of hot gas according to the present invention;
FIG. 2 is a schematic view of the floating plate structure of the present invention;
FIG. 3 is a schematic view of the high velocity flow of hot gas stream of the present invention;
fig. 4 is an enlarged view of a portion a of fig. 3 according to the present invention.
In the figure: the device comprises a drying box 1, a feeding hole 11, a discharging hole 12, an air chamber 2, a wind rectifying wheel 3, a rotating shaft 31, a fixing plate 32, a magnetic block 321, a sealing arc plate 33, a centrifugal spring 34, a floating plate 4, a buffer spring 41, an air pocket 42, an air hole 421, an air chamber 5 and a collecting bin 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, a pneumatic tea leaf drying method, the concrete method is as follows:
s1, placing the tea leaves on the floating plate 4 in the drying box 1 through the feed inlet 11; (ii) a
S2, starting an external hot air source to introduce hot air for drying into the air chamber 2;
s3, redistributing hot air entering the air chamber 2 by the wind wheel 3 in the air chamber 2 and pumping air to the gap in the air cavity 5;
s4, drying the tea leaves on the floating plate 4 through the hot air flow in the air cavity 5 through the air holes 421 on the floating plate 4;
s5, in the air pumping gap of the air adjusting wheel 3, the buffer spring 41 drives the floating plate 4 to vibrate to form moving and gathering tea leaves and to sieve the tea leaves into the air cavity 5 through the air hole 421, and then the tea leaves are flushed into the collection bin 6 with the next air pumping;
the pneumatic tea drying method further relates to a drying device, the drying device comprises a drying box 1, an air chamber 2 is formed in the inner side of the drying box 1, a feed inlet 11 is formed in one side, close to the air chamber 2, of the top of the drying box 1, the input end of the air chamber 2 is communicated with an external hot air source, the output end of the air chamber is communicated with the drying box 1, and the external hot air source improves drying hot air in the drying box 1 through the air chamber 2.
Coaxial rotation is connected with whole wind wheel 3 in air chamber 2, and whole wind wheel 3 includes pivot 31, fixed plate 32, sealed arc board 33 and centrifugal spring 34, and pivot 31 coaxial rotation is connected in air chamber 2, and a plurality of fixed plates 32 of 31 coaxial fixedly connected with of pivot just rotate and be connected with a plurality of sealed arc boards 33, thereby hot gas flow strikes fixed plate 32 and drives whole wind wheel 3 rotatoryly.
One-to-one sliding connection of one end of a plurality of sealed arc plates 33 far away from the rotating shaft 31 is on a plurality of fixed plates 32, the communicating hole has been run through on the sealed arc plates 33, and fixed connection has centrifugal spring 34 between the fixed plates 32, sealed arc plates 33 comprise straight plate and arc, wherein straight plate both ends rotate respectively to be connected on the rotating shaft 31 and fixed connection is in arc one side, arc camber is unanimous with the 2 interior peripheries of air chamber, straight plate is located fixed plates 32 the place ahead on the rotation direction, when whole wind wheel 3 is rotatory, under centrifugal action, sealed arc plates 33 pulling centrifugal spring 34 keeps away from fixed plates 32, change the space size between sealed arc plates 33 and the fixed plates 32, hold back partial steam through the communicating hole and be located wherein and outside output, change the pump gas effect of air chamber 2 to stoving case 1.
The air chamber 2 is cylindrical, and the diameter of the air chamber is consistent with the maximum diameter of the wind-adjusting wheel 3, so that hot air is prevented from directly entering the drying box 1 without passing through the wind-adjusting wheel 3.
Keep away from 2 one sides of air chamber and rotate in the stoving case 1 and be connected with kickboard 4, 2 one ends of air chamber are kept away from to stoving case 1 and have been seted up discharge gate 12, discharge gate 12 bottom and 4 upper surface parallel and level of kickboard, and the downward directional discharge gate 12 of kickboard 4 slope makes tealeaves on it to discharge gate 12 direction removal after kickboard 4 takes place to vibrate, makes things convenient for the ejection of compact.
4 bottom sides of kickboards and the 1 bottom formation wind chamber 5 of stoving case, and a plurality of air nests 42 are seted up to 2 output of air chamber and wind chamber 5 intercommunication, 4 upper surfaces of kickboards, do benefit to tealeaves to near air nest 42 gathering after 4 vibrations of kickboards take place.
A plurality of gas holes 421 are opened at the bottom of the plurality of gas cells 42, the bottom of the plurality of gas holes 421 is communicated with the air cavity 5, hot air flowing into the air cavity 5 is thrown into tea leaves on the floating plate 4 through the gas holes 421 to form a drying effect, and the hot air flowing into the upper part of the floating plate 4 is discharged through an exhaust device on the drying box 1.
Meanwhile, hot air flow entering the air chamber 5 blows tea leaves falling into the air chamber 5 from the air holes 421, and one end, far away from the air chamber 2, of the air chamber 5 is communicated with a collecting bin 6 for collecting the tea leaves.
Floating plate 4 is close to 2 one end fixedly connected with buffer spring 41 of air chamber, buffer spring 41 keeps away from 4 one end fixed connection of floating plate on the 1 inside wall of stoving case, sealed arc board 33 keeps away from the embedded magnetic path 321 that has of pivot 31 one end, when magnetic path 321 skims buffer spring 41 along with fixed plate 32 rotation, buffer spring 41 receives the influence in the change magnetic field that the motion of magnetic path 321 produced, inside induced-current that produces, every coil spring is equivalent to a coil, the coil circular telegram produces induced magnetic field, the induced magnetic field that a plurality of coils formed attracts each other, make buffer spring 41 shrink, pulling floating plate 4 moves down, leave the back at magnetic path 321, floating plate 4 receives the elastic force effect production aftervibration of buffer spring 41.
The principles of the present invention are now described as follows:
when tea leaves are dried, the tea leaves are placed on the floating plate 4 from the feeding hole 11 on the drying box 1, hot air for drying is introduced into the air chamber 2 in the drying box 1 from an external hot air source, hot air flows into the air chamber 5 through the air chamber 2 and permeates into the tea leaves on the surface of the floating plate 4 from the air holes 421 on the air nest 42 of the floating plate 4, the tea leaves are dried, and the problem that the tea leaves at the bottom are not good in drying effect due to tea leaf accumulation can be effectively avoided;
when hot air flows through the air chamber 2, the fixing plates 32 on the wind shaping wheel 3 coaxially and rotatably connected with the air chamber 2 are impacted, the fixing plates 32 drive the rotating shaft 31 of the wind shaping wheel 3 to rotate in the air chamber 2, when the flow rate of the hot air is high, the rotating speed of the wind shaping wheel 3 is high, under the action of high-speed centrifugation, the sealing arc plates 33 in the wind shaping wheel 3 pull the centrifugal springs 34 to be far away from the fixing plates 32 in sliding connection with the centrifugal springs, and hot air between two adjacent fixing plates 32 enters the space between the sealing arc plates 33 and the fixing plates 32 through the communicating holes in the sealing arc plates 33, so that the hot air pumped into the air cavity 5; when the flow rate of hot air flow is slow, under the action of low-speed centrifugation, the centrifugal spring 34 pulls the sealing arc plate 33 to be close to the fixed plate 32, so that hot air pumped into the air cavity 5 is increased; in the process, the air-conditioning wheel 3 redistributes the hot air flow, which is beneficial to keeping the balance of the circulation of the hot air flow pumped into the air cavity 5 and improving the uniformity of drying the tea leaves;
in the rotating process of the wind-adjusting wheel 3, the magnetic block 321 on the fixed plate 32 rotates to continuously sweep over the buffer spring 41 fixedly connected with one end of the floating plate 4, the buffer spring 41 is contracted under the electromagnetic induction effect of the changing magnetic field generated by the movement of the magnetic block 331 so as to pull the floating plate 4 to move downwards, at the moment, tea leaves on the floating plate 4 fall behind the floating plate 4, and the tea leaves staying empty are dried under the pumping effect of the wind-adjusting wheel 3, so that the tea leaves are heated and dried in a dispersing and rotating manner, and the drying effect is improved;
when the air pumping gap of the air adjusting wheel 3 is formed, the floating plate 4 is subjected to the residual vibration effect of the buffer spring 41, and the floating plate 4 inclines towards the discharge hole 12, so that the moving effect is formed on tea leaves, and the dried tea leaves are favorably discharged; meanwhile, the tea leaves on the surface of the floating plate 4 are gathered near the air pocket 42, so that the next air pumping is convenient for drying; and the fine tea leaves can enter the air cavity 5 from the air holes 421 in the air nest 42, and are brought into the collecting bin 6 by the air flow when the air is pumped next time, so that the tea leaves are screened and collected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (3)
1. A pneumatic tea leaf drying method is characterized by comprising the following specific steps:
s1, placing the tea leaves on a floating plate (4) in the drying box (1) through a feed port (11); (ii) a
S2, starting an external hot air source to introduce hot air for drying into the air chamber (2);
s3, redistributing hot air flow entering the air chamber (2) by the wind rectifying wheel (3) in the air chamber (2) and pumping air to the gap in the air cavity (5);
s4, drying the tea leaves in the hot air flow in the air cavity (5) through the air holes (421) on the floating plate (4) and on the floating plate (4);
s5, in the air pumping gap of the wind shaping wheel (3), the buffer spring (41) drives the floating plate (4) to vibrate to form moving and gathering tea leaves and to sieve the tea leaves into the air cavity (5) through the air holes (421), and then the tea leaves are flushed into the collection bin (6) along with the next air pumping;
the pneumatic tea leaf drying method further relates to a drying device, the drying device comprises a drying box (1), an air chamber (2) is formed in the inner side of the drying box (1), a feed inlet (11) is formed in one side, close to the air chamber (2), of the top of the drying box (1), the input end of the air chamber (2) is communicated with an external hot air source, the output end of the air chamber is communicated with the inside of the drying box (1), a whole air wheel (3) is connected in the air chamber (2) in a coaxial rotating mode, the whole air wheel (3) comprises a rotating shaft (31), a fixing plate (32), a sealing arc plate (33) and a centrifugal spring (34), the rotating shaft (31) is connected in the air chamber (2) in a coaxial rotating mode, the rotating shaft (31) is fixedly connected with a plurality of fixing plates (32) in a coaxial mode and is connected with a plurality of sealing arc plates (33) in a rotating mode, one end, far, a communicating hole is formed in the sealing arc plate (33) in a penetrating manner, and a centrifugal spring (34) is fixedly connected between the sealing arc plate and the fixing plate (32);
one side, far away from the air chamber (2), of the drying box (1) is rotatably connected with a floating plate (4), one end, far away from the air chamber (2), of the drying box (1) is provided with a discharge hole (12), the bottom of the discharge hole (12) is flush with the upper surface of the floating plate (4), the floating plate (4) is inclined downwards and points to the discharge hole (12), the bottom side of the floating plate (4) and the bottom of the drying box (1) form an air chamber (5), the output end of the air chamber (2) is communicated with the air chamber (5), the upper surface of the floating plate (4) is provided with a plurality of air cells (42), the bottoms of the air cells (42) are provided with a plurality of air holes (421), the bottoms of the air holes (421) are communicated with the air chamber (5), and one end, far away from the air chamber (2), of the air;
floating plate (4) are close to air chamber (2) one end fixedly connected with buffer spring (41), buffer spring (41) are kept away from floating plate (4) one end fixed connection on stoving case (1) inside wall, sealed arc board (33) are kept away from pivot (31) one end and are embedded to have magnetic path (321), magnetic path (321) and buffer spring (41) magnetic coordination.
2. A pneumatic tea leaf drying method according to claim 1, characterized in that the air chamber (2) is cylindrical and has a diameter which is consistent with the maximum diameter of the wind-shaping wheel (3).
3. A pneumatic tea leaf drying method according to claim 1, characterized in that the sealing arc plate (33) is composed of a straight plate and an arc plate, wherein the two ends of the straight plate are respectively rotatably connected to the rotating shaft (31) and fixedly connected to one side of the arc plate, the curvature of the arc plate is consistent with the inner circumference side of the air chamber (2), and the straight plate is positioned in front of the fixing plate (32) in the rotating direction.
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|---|---|---|---|
| CN202010997470.5A CN112197509A (en) | 2020-09-21 | 2020-09-21 | Pneumatic tea leaf drying method |
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| CN202010997470.5A CN112197509A (en) | 2020-09-21 | 2020-09-21 | Pneumatic tea leaf drying method |
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| CN112197509A true CN112197509A (en) | 2021-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353492A (en) * | 2021-12-28 | 2022-04-15 | 吉林农业科技学院 | Drying device is used in ginsenoside preparation |
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