Rock tea drying and stir-frying device
By using a multi-stage temperature-controlled drying module and a simulated hand-frying device, combined with an adaptive temperature control algorithm, the problems of insufficient temperature control accuracy and low strip yield in rock tea processing have been solved, achieving efficient and stable tea production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUYISHAN YIYU TEA CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional rock tea processing equipment suffers from complex structure and insufficient temperature control precision, making it unable to accurately match the special processing requirements of rock tea. This results in low strip yield, high broken tea rate, and a lack of a structure that mimics hand-rolling, leading to unstable tea quality.
A rock tea processing device was designed, which includes a multi-segment temperature-controlled drying module, a hand-stirring pot body, and a PLC controller. It adopts a mesh belt conveyor, hot air circulation, and a variable frequency swing mechanism, combined with an adaptive temperature control algorithm, to achieve segmented drying and variable speed stir-frying, simulating the hand-kneading process.
It improved the yield of tea leaves into strips, reduced the rate of broken tea leaves, ensured the consistency of tea quality and efficient production, and reduced energy consumption and reliance on manual labor.
Smart Images
Figure CN224470715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of tea processing equipment, specifically to a rock tea drying and frying device. Background Technology
[0002] In the production process of Wuyi rock tea, drying and roasting are crucial steps that determine the aroma and taste of the tea. Traditional Wuyi rock tea processing relies on manual operation, resulting in low efficiency and inconsistent quality. Existing technologies have attempted to combine drying and roasting functions in some integrated equipment, but these still suffer from complex structures, insufficient temperature control precision, and an inability to accurately match the specific requirements of Wuyi rock tea processing (such as segmented drying and variable-speed roasting); they also lack a structure that mimics hand-rolling, resulting in low strip formation and high tea breakage rates.
[0003] Traditional mechanical frying equipment, due to the smooth inner wall of the pot, can only achieve simple turning of the tea leaves, lacking the complex mechanical action of "kneading, twisting, pressing, and pulling" in hand-frying. This results in the deterioration of the tea leaf shape, a high leaf breakage rate, a low strip formation rate, and the inability to form the tightly rolled strips unique to hand-made tea. The mechanical breaking of cell walls is insufficient, the release of tea leaf contents is uneven, and the amount of tea polyphenols and aromatic substances that seep out is significantly less compared to hand-made tea.
[0004] Therefore, there is an urgent need for a highly integrated and intelligent rock tea processing device that is adapted to the special processes of rock tea, so as to improve the quality of tea production and processing efficiency. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide an integrated rock tea processing device with a compact structure, controllable temperature and humidity, and the ability to realize segmented drying and variable speed frying. Through modular design, intelligent control and imitation manual structure, it realizes continuous production, improves the quality of finished tea and reduces energy consumption and reliance on manual labor.
[0006] The objective of this utility model is achieved through the following technical solution.
[0007] A rock tea drying and frying device, characterized in that: it includes a drying module, a frying module, and a PLC controller; the drying module adopts a multi-segment independent temperature control box, with a built-in mesh belt conveyor mechanism and a hot air circulation system; the frying module includes an inclined swaying pot and a frequency conversion swaying mechanism.
[0008] Furthermore, a rock tea drying and frying device is characterized in that: the hot air circulation system includes a first temperature sensor, a first humidity sensor, a centrifugal fan and an adjustable damper; the tilting and swingable pot body is also provided with a second temperature sensor and a second humidity sensor.
[0009] Furthermore, a rock tea drying and frying device is characterized in that: the inner wall of the inclined swingable pot is provided with parabolic arc-shaped convex patterns that imitate hand-frying, the height of the arc-shaped convex patterns is 2-3mm, and the cross-section of the arc-shaped convex patterns is an involute arc-shaped cross-section that is wider at the bottom and narrower at the top.
[0010] Furthermore, a rock tea drying and frying device is characterized in that: the spacing between the arc-shaped convex patterns is 40-60mm, and the spacing between two adjacent arc-shaped convex patterns is not equal along the entire arc trajectory, with the spacing being the largest at the bottom of the arc, and the spacing gradually shrinking from the bottom of the arc towards both sides.
[0011] Furthermore, a rock tea drying and frying device is characterized in that: the arc-shaped textured surface is sprayed with a food-grade Teflon coating, and the coefficient of friction is controlled within the range of 0.10-0.25.
[0012] Furthermore, a rock tea drying and frying device is characterized in that: the PLC controller has a built-in adaptive temperature control algorithm and a database corresponding to tea moisture content and real-time temperature and humidity, as well as a database corresponding to tea rolling morphology and tea moisture content.
[0013] Furthermore, a rock tea drying and frying device is characterized in that: the PLC controller dynamically adjusts the drying temperature curve and damper opening of the drying module according to the moisture content of the tea leaves; and dynamically adjusts the swaying frequency and swaying amplitude of the frequency conversion swaying mechanism of the frying module according to the moisture content of the tea leaves to improve the tea leaf rolling shape.
[0014] Furthermore, a rock tea drying and frying device is characterized in that: the bottom of the inclined, swaying pot body integrates an electromagnetic induction heating unit with stepless adjustable heating power.
[0015] Furthermore, a rock tea drying and frying device is characterized in that: the bottom heating surface of the inclined swingable pot is flat, so that the tea leaves are heated evenly.
[0016] Furthermore, a rock tea drying and frying device is characterized in that: the surface of the metal mesh belt used in the mesh belt conveyor mechanism is coated with an anti-stick ceramic microbead coating.
[0017] This technical solution employs a multi-stage independent temperature control module for the drying module, which gradually reduces the moisture content of the tea leaves, preventing them from burning on the outside and remaining raw on the inside.
[0018] This technical solution involves setting parabolic arc-shaped raised textures on the inner wall of the frying pan, with a spacing of 40-60mm, which is equivalent to the width of a hand spatula. The surface is coated with a Teflon coating (friction coefficient 0.10-0.25), forming a directional extrusion gradient under low friction. The spacing between two adjacent raised textures is not equal. Combined with frequency conversion reciprocating oscillation and inclined sliding motion, this further enhances the extrusion and twisting effect on the tea leaves, promotes the orderly rupture of tea cell walls, and improves the quality of tea.
[0019] This technical solution's frying module achieves the refined processing effect of handmade tea in mechanized production through structural biomimicry and kinematic optimization, resolving the long-standing technical contradiction in the tea processing industry where scale and quality cannot be simultaneously achieved.
[0020] This technical solution uses a PLC controller with a built-in adaptive temperature control algorithm, as well as a database corresponding to tea moisture content and real-time temperature and humidity, and a database corresponding to tea rolling morphology and tea moisture content. It can dynamically adjust various operating parameters of the rock tea processing device according to the tea moisture content, and ensure the excellent quality and consistency of rock tea products through optimized process control. Attached Figure Description
[0021] Figure 1 This is a front view of an embodiment of the present utility model.
[0022] Figure 2 This is a perspective view of an embodiment of the present utility model.
[0023] Figure 3 This is a schematic diagram of the drying module in an embodiment of the present invention.
[0024] Figure 4 This is a perspective view of the drying module in an embodiment of this utility model.
[0025] Figure 5 This is a schematic diagram of the stir-frying module in an embodiment of this utility model.
[0026] Figure 6 This is a perspective view of the frying module according to an embodiment of the present invention.
[0027] Figure 7 This is a top view of the stir-fry module without the pot lid in an embodiment of this utility model.
[0028] Figure 8 This is a perspective view of the frequency conversion swing mechanism in an inclined position according to an embodiment of the present invention.
[0029] Figure 9 This is another perspective view of the frequency conversion swing mechanism in the tilted position according to an embodiment of the present invention.
[0030] Figure 10 This is a top view of the frequency conversion swing mechanism in an inclined position according to an embodiment of this utility model.
[0031] Figure 11 This is a left view of the frequency conversion swing mechanism in an inclined position according to an embodiment of this utility model. Detailed Implementation
[0032] The following description, in conjunction with the accompanying drawings, further illustrates a rock tea drying and frying device according to this utility model.
[0033] See the appendix for examples. Figure 1-11 A rock tea drying and frying device includes a drying module 100, a frying module 200, and a PLC controller 300.
[0034] The drying chamber 110 of the drying module 100 is a three-section independent temperature-controlled rectangular chamber. The internal space of the drying chamber is divided into three chambers, and each chamber is equipped with an independently temperature-controlled heating unit 111 at the bottom. A feeding port 112 is provided at one end of the top of the drying chamber, and a discharge port 113 is provided at the other end of the bottom of the drying chamber. Observation windows 114 are provided on both sides of the drying chamber. The material is high-temperature resistant glass, which makes it easy to observe the state of the tea leaves.
[0035] The drying chamber 110 is equipped with a mesh belt conveyor mechanism, which includes a stainless steel mesh belt 115, a rotating wheel 116 and a servo motor (not shown in the figure). The surface of the stainless steel mesh belt 115 is coated with an anti-stick ceramic microbead coating to prevent tea leaves from sticking to the stainless steel mesh belt. The servo motor is driven by a PLC controller 300 and its speed range is adjustable from 0.1 to 1.5 m / min.
[0036] The top of the drying chamber 110 is equipped with a hot air circulation system, including a first temperature sensor 121, a first humidity sensor 122, a centrifugal fan 123, an adjustable damper 124, and an air duct 125; the adjustable damper 124 is driven by a cylinder 126. The PLC controller 300 independently adjusts the operating parameters of the heating unit 111 in each section of the chamber and the opening angle of the adjustable damper 124 according to the data from each sensor, thereby realizing independent control of the temperature and humidity inside each section of the chamber.
[0037] The stir-frying module 200 includes an inclined, swayable pot body 210, a support 220, and a variable frequency swaying mechanism. The variable frequency swaying mechanism is a crank rocker mechanism driven by a variable frequency motor 221. The two ends of the pot body 210 are suspended on the portal frame 220 by two spindles 227. The portal frame 220 is fixedly mounted on the inclined support 230.
[0038] The variable frequency swing mechanism includes a variable frequency motor 221, a crank 222 fixedly connected to the output shaft of the variable frequency motor, and the crank 222 is hinged to the slider 224 through a pin 223; a slide groove 225 is fixedly provided at the longitudinal axis position of the outer wall of one end face of the pot body 210, and the slider 224 can slide freely in the slide groove 225.
[0039] A bushing 217 is provided on the upper part of the side wall axis of both ends of the pot body 210. A shaft hole 226 is provided on the portal frame 220. The spindle 227 is inserted into the bushing 217 and the shaft hole 226, so that the pot body 210 is mounted in the shaft hole 226 of the portal frame 220 through the spindle 227.
[0040] When the output shaft of the variable frequency motor 221 rotates, it drives the crank 222 to rotate. The crank 222, through the pin 223, drives the slider 224 to perform a compound motion of oscillation and sliding within the slide groove 225. The oscillation of the slider 225 causes the slide groove to oscillate, thereby driving the pot body 210, which is fixedly connected to the slide groove 225, to oscillate as well. The oscillation angle of the pot body 210 is between 0° and 45°.
[0041] The pot body 210 is a trapezoidal groove, wider at the top and narrower at the bottom, and is made of stainless steel. At the top are a lid 211 and a feed inlet 212. The feed inlet 213 is connected to the discharge outlet 113 of the drying chamber via a flexible hose 400, preferably a cotton cloth hose. A discharge outlet 213 is located at one end of the bottom of the pot body 210. An infrared temperature sensor 214 and a humidity sensor 215 are installed on the lid 212. An observation window 218, made of high-temperature resistant glass, is provided on the lid 212 for easy observation of the tea leaves. An electromagnetic induction heating unit is integrated at the bottom of the pot body 210, with a steplessly adjustable heating power of 2-8kW.
[0042] The inner wall of the bottom of the pot body 210 is provided with parabolic arc-shaped raised texture 216 that imitates hand-stirring. The height of the arc-shaped raised texture is 2-3mm, and the cross-sectional shape of the arc-shaped raised texture 216 is an involute arc-shaped cross-section that is wider at the bottom and narrower at the top. The involute arc-shaped cross-section can make the tea leaves move smoothly and effectively avoid damage and breakage of the tea leaves.
[0043] The spacing between the two arc-shaped convex patterns 216 is 40-60mm, which is comparable to the width of the hand spatula used in the hand-frying process of tea. The spacing between two adjacent arc-shaped convex patterns is not equal along the entire arc trajectory, with the spacing being the largest at the bottom of the arc and gradually decreasing towards both sides. The setting of the non-equally spaced parabolic trajectory convex patterns allows the tea leaves to achieve the combined mechanical action of "kneading, twisting, pressing, and pulling" in the hand-frying process of Wuyi rock tea to the maximum extent, promoting the orderly rupture of tea cell walls and improving the quality of the tea.
[0044] The 216 surface with arc-shaped embossed texture is coated with a food-grade Teflon coating, and the coefficient of friction is controlled within the range of 0.10-0.25. While reducing frictional loss, the Teflon coating can ensure the orderly rupture of tea cell walls and avoid excessive damage to the tea leaves.
[0045] The PLC controller 300 incorporates an adaptive temperature control algorithm, a database corresponding to tea moisture content and real-time temperature and humidity, and a database corresponding to tea rolling morphology and tea moisture content. The PLC controller 300 dynamically adjusts the drying temperature curve and damper opening of the drying module based on the tea moisture content; it also dynamically adjusts the heating power of the electromagnetic induction heating unit in the roasting module, as well as the oscillation frequency and amplitude of the variable frequency oscillation mechanism, to improve the tea rolling morphology.
[0046] The PLC controller has a built-in adaptive temperature control algorithm, which can dynamically adjust various operating parameters of the rock tea processing equipment according to the moisture content of the tea leaves. Through optimized process control, it ensures the excellent quality and consistency of rock tea products.
[0047] The working process of this utility model rock tea drying and frying device is as follows.
[0048] The tea leaves to be processed are fed into the stainless steel mesh belt 115 through the feeding port 112 of the drying module 100. Driven by the stainless steel mesh belt 115, the tea leaves pass through the various chambers of the drying box 110 for drying. Then, the tea leaves fall into the discharge port 113 at the end of the stainless steel mesh belt 115 and enter the pot body inlet 213 of the frying module 200 through the flexible tube 400, falling into the pot body 210 for frying. Under the swaying action of the pot body 210, the tea leaves entering the pot body 210 gradually slide down the inclined surface of the pot bottom to the discharge port 213 and are discharged from the pot body, completing the frying process.
[0049] Although the present invention has been described in detail using specific methods, those skilled in the art will understand that various changes can be made without departing from the intent and scope of the present invention.
Claims
1. A device for drying and frying rock tea, characterized in that: It includes a drying module (100), a frying module (200), and a PLC controller (300); the drying module (100) adopts a multi-segment independent temperature control box (110) with a built-in mesh belt conveyor and hot air circulation system; the frying module (200) includes an inclined swaying pot body (210) and a frequency conversion swaying mechanism.
2. The rock tea drying and frying apparatus according to claim 1, characterized in that: The hot air circulation system includes a first temperature sensor (121), a first humidity sensor (122), a centrifugal fan (123), and an adjustable damper (124); the tiltable swaying pot body (210) is also equipped with a second temperature sensor (214) and a second humidity sensor (215).
3. The rock tea drying and frying apparatus according to claim 1, characterized in that: The inner wall of the tiltable swaying pot body (210) is provided with parabolic arc-shaped raised texture (216) that imitates hand-stirring. The height of the arc-shaped raised texture is 2-3mm, and the cross section of the arc-shaped raised texture (216) is an involute arc-shaped cross section that is wider at the bottom and narrower at the top.
4. The rock tea drying and frying apparatus according to claim 3, characterized in that: The arc-shaped convex patterns (216) are spaced 40-60mm apart, and the spacing between two adjacent arc-shaped convex patterns is not equal along the entire arc trajectory. The spacing is the largest at the bottom of the arc, and the spacing gradually shrinks from the bottom of the arc to both sides.
5. The rock tea drying and frying apparatus according to claim 3, characterized in that: The surface of the arc-shaped convex texture (216) is coated with a food-grade Teflon coating, and the coefficient of friction is controlled within the range of 0.10-0.
25.
6. The rock tea drying and frying apparatus according to claim 1, characterized in that: The PLC controller (300) has a built-in adaptive temperature control algorithm, as well as a database corresponding to tea moisture content and real-time temperature and humidity, and a database corresponding to tea rolling morphology and tea moisture content.
7. The rock tea drying and frying apparatus according to claim 6, characterized in that: The PLC controller (300) dynamically adjusts the drying temperature curve and damper opening of the drying module according to the moisture content of the tea leaves; and dynamically adjusts the swing frequency and swing amplitude of the frequency conversion swing mechanism of the frying module according to the moisture content of the tea leaves to improve the tea leaf rolling shape.
8. The rock tea drying and frying apparatus according to claim 1, characterized in that: The bottom of the tiltable pot body (210) integrates an electromagnetic induction heating unit with stepless adjustable heating power.
9. The rock tea drying and frying apparatus according to claim 1, characterized in that: The bottom heating surface of the tilting, swingable pot body (210) is flat, so that the tea leaves are heated evenly.
10. The rock tea drying and frying apparatus according to claim 1, characterized in that: The stainless steel mesh belt (115) used in the mesh belt conveyor mechanism is coated with an anti-stick ceramic microbead coating.