Tea extraction device with built-in stirrer and adaptive height adjustment

Abstract

The application discloses a tea extraction device with built-in stirrer and self-adaptive height adjustment, and belongs to the technical field of tea extraction. The device comprises a stirring tank body, a support frame installed on the stirring tank body and used for supporting and installing the device as a whole, a stirrer height self-adaptive adjustment unit installed on the support frame and used for self-adaptive adjustment according to the viscosity of tea soup, the compactness of tea leaves or the height of tea residue layer in the stirring tank body, a water inlet and outlet assembly arranged on the outer side of the stirring tank body, a stirring driving assembly used for driving, a height self-adaptive driving assembly used for self-adaptive adjustment according to the viscosity of tea soup, the compactness of tea leaves or the height of tea residue layer, and a height self-adaptive driven assembly driven by the height self-adaptive driving assembly. The resistance change caused by the viscosity of tea soup, the compactness of tea leaves or the height of tea residue layer realizes self-adaptive adjustment of the height of the stirrer.

Description

Technical Field

[0001] This invention relates to the field of tea extraction, specifically to a tea extraction device with a built-in stirrer that adaptively adjusts the height. Background Technology

[0002] This invention relates to the field of tea extraction technology. With the rapid development of the new tea beverage industry and the continuous upgrading of the tea deep processing industry, standardized and high-quality tea extraction has become a core development requirement of the industry. Stirred extraction, as the mainstream process for tea infusion preparation, can enhance the mass transfer efficiency between tea leaves and water through mechanical stirring, effectively shortening the extraction time. It is widely used in various scenarios such as commercial tea beverage stores, laboratory tea research, and industrial tea beverage production lines. The working height of the stirring mechanism directly affects the uniformity of tea infusion extraction and the final flavor quality, and is one of the core design considerations for tea extraction equipment.

[0003] Existing tea extraction stirring devices mostly employ fixed-height stirring structures, which cannot adapt to the dynamic processes of water absorption and expansion, tea residue sedimentation, and changes in tea liquor viscosity during tea extraction. This easily leads to problems such as insufficient mixing in the early stages of extraction and the stirring components becoming buried in the tea residue layer in the later stages, making it difficult to guarantee the consistency and stability of the tea liquor flavor. A few extraction devices with adjustable stirring heights mostly use electronically controlled sensors combined with drive motors for adjustment. In the high-temperature and high-humidity tea liquor extraction environment, the sensors are easily contaminated by moisture and tea residue, leading to failure, and the motor has a high probability of failure, resulting in insufficient equipment reliability. Other mechanical adjustment structures have transmission components directly exposed to the tea liquor environment, making them prone to jamming and entanglement by tea residue, resulting in poor adjustment sensitivity, difficult equipment maintenance, and a short service life. Summary of the Invention

[0004] The purpose of this invention is to provide a tea extraction device with a built-in stirrer that adaptively adjusts the height, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: It includes a mixing tank body, on which a support frame, identical to the one used for overall support of the device, is installed. A stirrer height adaptive adjustment unit is installed on the support frame, used to adaptively adjust the height based on the viscosity of the tea soup, the density of the tea leaves, or the height of the tea residue layer inside the mixing tank body. A water inlet / outlet assembly is also provided on the outside of the mixing tank body. The stirrer height adaptive adjustment unit includes a stirring drive assembly for driving and a height adaptive drive assembly for adaptive adjustment based on the viscosity of the tea soup, the density of the tea leaves, or the height of the tea residue layer. It also includes a height adaptive driven assembly driven by the height adaptive drive assembly.

[0006] As a further preferred embodiment of this technical solution: the stirring drive assembly includes a drive servo motor mounted on a support frame, the output end of the drive servo motor is connected to a stirring drive shaft, a section of the stirring drive shaft is connected to a connecting sleeve, and a stirring rod is provided on the outside of the connecting sleeve.

[0007] As a further preferred embodiment of this technical solution: the stirring drive shaft is rotatably connected to the upper middle position of the stirring tank body, and the stirring rods are provided in several sets and are evenly inclined on the outer wall of the connecting sleeve;

[0008] As a further preferred embodiment of this technical solution: the height adaptive drive assembly includes an active slide tube that slides close to the inner side of the stirring rod, one end of the active slide tube is connected to a connecting shell, the inner side of the connecting shell is rotatably connected to a first rotating shaft, one end of the first rotating shaft is connected to a drive auxiliary plate, a first smooth thin-walled sleeve is provided at the connection between the first rotating shaft and the connecting shell, a torsion spring is sleeved on the outer side of one end of the first rotating shaft, and a drive steel wire rope is wound around the middle position of the first rotating shaft;

[0009] As a further preferred embodiment of this technical solution: the connecting shell is located in the middle of the lower inner side of the mixing tank body, the drive auxiliary plate is initially inclined, and the two ends of the torsion spring are respectively fixed to one side of the collar provided on the outside of the first rotating shaft and the inner side wall of the connecting shell. The first rotating shaft is provided in two sets and symmetrically arranged at both ends of the first rotating shaft, and the torsion spring is located on the inner side of the connecting shell.

[0010] As a further preferred embodiment of this technical solution: the height adaptive drive assembly also includes a guide ring disposed inside the active slide tube, one end of the drive wire rope is connected to a drive piston, a return spring is connected to the lower side of the drive piston, one end of the drive wire rope is fixed at the middle position of the first rotating shaft, and the drive wire rope is disposed between two sets of torsion springs.

[0011] As a further preferred embodiment of this technical solution: the drive wire rope slides through the inner side of the guide ring, the drive piston slides against the hole provided on the inner side of the stirring rod, the two ends of the return spring are respectively fixed to one end of the drive piston and the inner side of the stirring rod, and the end of the drive wire rope away from the first rotating shaft slides through the middle position of the lower end of the stirring rod.

[0012] As a further preferred embodiment of this technical solution: the height adaptive driven component includes a first auxiliary connecting tube fixed to the upper end of the connecting sleeve, a transmission hole is provided on the inner side of the first auxiliary connecting tube, a driven piston is slidably connected to the inner side of the transmission hole, a driven slide tube is connected to one end of the driven piston, a second smooth thin-walled sleeve is provided on the outer side of one end of the driven slide tube, an auxiliary slide tube is provided at the upper end of the connecting sleeve, and a second auxiliary connecting tube is slidably connected to the inner side of one end of the auxiliary slide tube;

[0013] As a further preferred embodiment of this technical solution: the end of the auxiliary slide tube away from the second auxiliary connecting tube is connected to the middle position of one side of the first auxiliary connecting tube, the first auxiliary connecting tube is U-shaped, and the transmission hole and the hole inside the stirring rod are interconnected;

[0014] As a further preferred embodiment of this technical solution: the end of the driven slide tube away from the second smooth thin-walled sleeve is slidably connected to a hole provided inside the end of the first auxiliary connecting tube, the end of the driving auxiliary plate away from the first rotating shaft is rotatably connected to the end of the driven slide tube away from the driven piston, and the second smooth thin-walled sleeve is provided outside the connection between the driving auxiliary plate and the driven slide tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention achieves adaptive adjustment of the stirrer height by utilizing the resistance changes caused by the viscosity of the tea soup, the density of the tea leaves, or the height of the tea residue layer. It can keep the stirring mechanism in a low position at the initial stage of extraction, close to the tea leaf layer to ensure the stirring and mixing effect in the early stage of extraction. After the tea leaves absorb water, expand, and settle to form a tea residue layer, the stirring height is automatically raised to avoid the stirring parts being buried in the tea residue layer and causing the tea leaves to break. This effectively ensures the uniformity of tea soup extraction and the consistency of flavor quality.

[0017] 2. This invention adopts a fully mechanical adjustment structure, eliminating the need for electronic control sensors and drive motors. This fundamentally avoids problems such as failure of electronic control components and motor failure caused by moisture and tea residue in the tea extraction environment. The reliability of the equipment is greatly improved, making it suitable for continuous operation in commercial tea shops and long-term operation in industrial production lines. This effectively reduces the probability of equipment failure and maintenance costs.

[0018] 3. The core transmission and adjustment components of this invention adopt a closed design, which, together with a smooth thin-walled sleeve, effectively isolates the tea soup from the internal mechanism, preventing tea residue from entering the moving parts and causing problems such as jamming and entanglement. This ensures the long-term smooth operation of the equipment and extends its service life. At the same time, the fully enclosed hydraulic transmission structure makes the adjustment of the stirring height smooth without rigid impact, further improving the stability of the equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a tea extraction device with a built-in stirrer that adaptively adjusts its height according to the present invention. Figure 1 ;

[0020] Figure 2 This is a cross-sectional view of the overall structure of a tea extraction device with a built-in stirrer that adaptively adjusts its height according to the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of a tea extraction device with a built-in stirrer that adaptively adjusts its height according to the present invention.

[0022] Figure 4 This is a cross-sectional view of the internal structure of a tea extraction device with a built-in stirrer that adaptively adjusts its height according to the present invention.

[0023] Figure 5 for Figure 3 Enlarged view of point A;

[0024] Figure 6 for Figure 4 Enlarged view of point B;

[0025] Figure 7 for Figure 4 Enlarged view of point C.

[0026] In the diagram: 1. Mixing tank body; 2. Support frame;

[0027] 3. Agitator height adaptive adjustment unit;

[0028] Stirring drive assembly: 31. Drive servo motor; 32. Stirring drive shaft; 33. Connecting sleeve; 34. Stirring rod;

[0029] Height-adaptive drive assembly: 35. Active slide tube; 36. Connecting shell; 37. First rotating shaft; 38. Drive auxiliary plate; 39. First smooth thin-walled sleeve; 310. Torsion spring; 311. Drive wire rope; 312. Guide ring; 313. Drive piston; 314. Return spring;

[0030] Height-adaptive driven assembly: 315, first auxiliary connecting tube; 316, transmission hole; 317, driven piston; 318, driven slide tube; 319, second smooth thin-walled sleeve; 320, auxiliary slide tube; 321, second auxiliary connecting tube;

[0031] 4. Water inlet and outlet components. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example

[0034] Please see Figures 1-7 This is a schematic diagram of some embodiments of a tea extraction device with a built-in stirrer that adaptively adjusts its height, as described in this application.

[0035] In some embodiments, the tea extraction device with an adaptive height adjustment mechanism and built-in stirrer can be applied to commercial tea beverage preparation, extraction of effective components from deep-processed tea leaves, extraction for laboratory tea science research, and industrial tea beverage production lines. Specifically, in commercial tea beverage preparation, it can be used for standardized tea infusion extraction in milk tea shops and new tea beverage stores; in deep-processed tea leaves, it can be used for low-temperature extraction of functional components such as tea polysaccharides and tea polyphenols; in laboratory tea science research, it can be used for optimizing extraction parameters for different tea varieties; and in industrial tea beverage production lines, it can be used for large-scale, standardized, continuous production of tea infusions. Figure 1 In this embodiment, the tea extraction device is described as being used in commercial tea extraction in new tea beverage stores. Of course, tea extraction devices in other application areas can also adopt a similar structure, which will not be described in detail below.

[0036] It is understood that the schematic diagram only schematically shows the tea extraction device including the stirring tank body 1, support frame 2, stirrer height adaptive adjustment unit 3, and water inlet and outlet components 4. The actual shape (e.g., the stirring tank body 1 can be designed as a cylinder, a square barrel, etc.), actual size, and actual installation position (e.g., the support frame 2 can be set at the top, side, or bottom of the stirring tank body 1) of these components are not limited by the schematic diagram. The tea extraction device may also include more or fewer components than shown in the schematic diagram, such as electric heating module, temperature control module, tea soup filtration unit, pressure control module, and other auxiliary components to improve extraction efficiency and tea soup quality, which are not limited here.

[0037] In some embodiments, the tea extraction device with built-in stirrer adaptive height adjustment may include a stirring tank body 1, a support frame 2, a stirrer height adaptive adjustment unit 3, and a water inlet / outlet assembly 4. The support frame 2 is mounted on the stirring tank body 1 and is used to provide overall support for the device.

[0038] The stirrer height adaptive adjustment unit 3 is installed on the support frame 2 and is used to adaptively adjust the stirring height according to the viscosity of the tea soup, the density of the tea leaves, or the height of the tea residue layer in the stirring tank body 1.

[0039] The water inlet and outlet assembly 4 is located on the outside of the mixing tank body 1 and is used for water intake during the extraction process and tea soup discharge after extraction.

[0040] It should be noted that when this tea extraction device is used for commercial tea extraction in new tea beverage stores, the mixing tank body 1 can be made of food-grade 304 stainless steel, and the inner wall can be mirror polished to avoid tea residue.

[0041] The support frame 2 can be made of carbon steel with powder coating or stainless steel to ensure structural stability; the stirrer height adaptive adjustment unit 3 can respond to the sedimentation of tea residue layer and changes in tea soup viscosity during the tea extraction process, and automatically adjust the height of the stirring paddle to avoid the stirring paddle being buried in the tea residue layer, which would cause the tea leaves to break and the tea soup to become bitter. At the same time, it ensures that the tea soup is evenly mixed during the extraction process and improves the consistency of the tea soup flavor.

[0042] The water inlet and outlet component 4 can be connected to the store's water purification system and tea liquid storage tank to achieve standardized water inlet and outlet.

[0043] For example, the tea extraction device may also include a sealing lid (not shown in the figure), which is connected to the top of the mixing tank body 1 by a snap or thread. Closing the sealing lid during the extraction process can reduce the evaporation of tea aroma and prevent external impurities from entering the tank, thus ensuring the purity of the tea.

[0044] In some embodiments, the stirrer height adaptive adjustment unit 3 includes a stirring drive component for driving the stirring action, a height adaptive drive component for adaptive adjustment based on the viscosity of the tea soup, the density of the tea leaves, or the height of the tea residue layer, and a height adaptive driven component driven by the height adaptive drive component.

[0045] In some embodiments, the stirring drive assembly may include a drive servo motor 31, a stirring drive shaft 32, a connecting sleeve 33, and a stirring rod 34. The drive servo motor 31 is bolted to the top crossbeam of the support frame 2, providing rotational driving force for the stirring action.

[0046] The stirring drive shaft 32 is a food-grade 304 stainless steel solid shaft. Its top end is coaxially fixed to the output end of the drive servo motor 31 through a coupling. The stirring drive shaft 32 is rotatably connected to the upper middle position of the stirring tank body 1. A food-grade mechanical seal is provided at the contact point between the shaft and the stirring tank body 1 to prevent tea leakage.

[0047] The connecting sleeve 33 is a stainless steel hollow sleeve, which is coaxially fitted and fixed to the lower end of the stirring drive shaft 32 by a flat key, and can rotate synchronously with the stirring drive shaft 32.

[0048] Several sets of stirring rods 34 are evenly inclined and welded to the outer wall of the connecting sleeve 33. The inclination direction of the stirring rods 34 matches the rotation direction, which can form axial and radial turbulence during rotation, thereby improving the uniformity of tea soup mixing.

[0049] It should be noted that the number, tilt angle, and length of the stirring rods 34 can be adjusted according to the volume of the mixing tank body 1 and the type of tea being extracted. Here, only four sets with a 30° tilt angle are described as an example. For instance, for large-capacity industrial extraction tanks, 6-8 sets of stirring rods 34 can be set to increase the stirring coverage area. For extraction of broken tea leaves, the tilt angle of the stirring rods 34 can be reduced to decrease the turbulence intensity and prevent excessive tea leaf breakage. Understandably, the specific shape of the stirring rods 34 shown in the figure is only illustrative; they can also be designed as arc-shaped, paddle-shaped, etc., as long as they can achieve the mixing of the tea soup. No limitation is made here.

[0050] In some embodiments, the height-adaptive drive assembly may include an active slide tube 35, a connecting shell 36, a first rotating shaft 37, a drive auxiliary plate 38, a first smooth thin-walled sleeve 39, a torsion spring 310, a drive wire rope 311, a guide ring 312, a drive piston 313, and a return spring 314.

[0051] Among them, the active slide tube 35 is a food-grade stainless steel smooth hollow tube, which fits and slides in the preset sliding hole on the inner side of the stirring rod 34, and can slide back and forth along the axis of the stirring rod 34.

[0052] The connecting shell 36 is a closed stainless steel shell, welded to the lower end of the active slide tube 35, and rotates synchronously with the active slide tube 35 and the stirring rod 34. The inner cavity of the connecting shell 36 is isolated from the outside tea soup to prevent tea residue and tea soup from entering the internal mechanism. The first rotating shaft 37 is a stainless steel optical shaft, which is rotatably connected to the inner side of the connecting shell 36 through bearings, and its two ends extend to the pre-set through holes on the side wall of the connecting shell 36.

[0053] The drive auxiliary plate 38 is an arc-shaped guide inclined plate, one end of which is fixed to the end of the first rotating shaft 37. It is initially inclined and is used to sense the resistance of tea soup, the density of tea leaves and the contact resistance of tea residue layer.

[0054] The first smooth thin-walled sleeve 39 is a food-grade polytetrafluoroethylene thin-walled sleeve, which is sleeved at the connection between the first rotating shaft 37 and the connecting shell 36. This ensures that the first rotating shaft 37 can rotate smoothly, and completely prevents tea residue and tea soup from entering the inner cavity of the connecting shell 36, thus avoiding the mechanism from jamming.

[0055] The torsion spring 310 is sleeved on the outer side of the end of the first rotating shaft 37 and located on the inner side of the connecting shell 36. The two ends of the torsion spring 310 are respectively fixed to one side of the collar on the outer side of the first rotating shaft 37 and the inner side wall of the connecting shell 36, and are used to provide a restoring torque for the first rotating shaft 37.

[0056] The drive wire rope 311 is a food-grade 304 stainless steel wire rope. One end of it is wound and fixed in the middle position of the first rotating shaft 37, located between two sets of torsion springs 310. It can be wound and released as the first rotating shaft 37 rotates.

[0057] The guide ring 312 is a smooth polytetrafluoroethylene ring, which is fixedly installed on the inner side of the active slide tube 35. The drive wire rope 311 slides through the inner side of the guide ring 312 to limit the movement direction of the drive wire rope 311 and prevent the wire rope from shaking or getting tangled.

[0058] The drive piston 313 is made of polytetrafluoroethylene and is fitted with a food-grade O-ring on the outside. It slides in close contact with the hydraulic transmission hole 316 pre-set inside the stirring rod 34. The end of the drive wire rope 311 away from the first rotating shaft 37 passes through the through hole at the lower end of the stirring rod 34 and is fixed to the lower end of the drive piston 313.

[0059] The reset spring 314 is a food-grade stainless steel compression spring, which is located in the hydraulic transmission hole 316 inside the stirring rod 34. Its two ends are respectively fixed to the upper end face of the drive piston 313 and the inner wall of the top of the hydraulic transmission hole 316, and are used to provide reset force for the drive piston 313.

[0060] It should be noted that two sets of the first rotating shaft 37 can be provided, symmetrically arranged at both ends of the connecting shell 36. Correspondingly, two sets of the drive auxiliary plate 38 can also be provided, symmetrically distributed, to ensure the uniformity of resistance sensing and avoid mechanism jamming caused by unilateral force. The stiffness of the torsion spring 310 can be adjusted according to the target trigger resistance. For example, for the extraction of large-leaf tea, a torsion spring 310 with greater stiffness can be selected to increase the trigger threshold and avoid false triggering. For the extraction of broken tea or tea powder, a torsion spring 310 with less stiffness can be selected to increase the resistance sensing sensitivity. Understandably, the tilt angle and curvature of the drive auxiliary plate 38 can be adjusted according to the extraction scenario and are not limited here, as long as the resistance of the tea residue layer can be sensed and the first rotating shaft 37 can be rotated.

[0061] In this embodiment, the drive auxiliary plate 38 adopts an arc-shaped flow guide structure with rounded corners and smooth transitions at the edges. Tea leaves and tea soup can only slide along the surface of the plate and will not get stuck or entangled at the edge of the plate. The closed connecting shell 36, together with the first smooth thin-walled sleeve 39, can completely isolate tea residue, tea soup and internal rotating mechanism, fundamentally avoiding the problems of tea leaves getting stuck and mechanism rusting. The guide ring 312 can ensure that the drive wire rope 311 always moves along the axial direction during the winding and releasing process, avoiding the wire rope from running off course or getting knotted, and improving the reliability of transmission.

[0062] In some embodiments, the height-adaptive driven component may include a first auxiliary connecting tube 315, a driven piston 317, a driven slide tube 318, a second smooth thin-walled sleeve 319, an auxiliary slide tube 320, and a second auxiliary connecting tube 321.

[0063] Wherein: the first auxiliary connecting pipe 315 is a U-shaped stainless steel hollow pipe, one end of which is fixed to the upper end of the connecting sleeve 33 by welding. The inner side of the first auxiliary connecting pipe 315 is provided with a transmission hole 316, which is interconnected with the hydraulic transmission hole 316 on the inner side of the stirring rod 34. The transmission hole 316 is filled with food-grade hydraulic oil for transmitting hydraulic driving force.

[0064] The driven piston 317 is made of polytetrafluoroethylene and is fitted with a food-grade O-ring on the outside. It slides against the inside of the transmission hole 316 and can reciprocate along the axial direction of the transmission hole 316.

[0065] The driven slide tube 318 is a smooth hollow stainless steel tube. One end of it is fixed to the upper end face of the driven piston 317, and the other end extends out of the pre-set sliding hole at the end of the first auxiliary connecting tube 315. The end of the driven slide tube 318 away from the driven piston 317 is rotatably connected to the free end of the drive auxiliary plate 38.

[0066] The second smooth thin-walled sleeve 319 is a food-grade polytetrafluoroethylene thin-walled sleeve, which is sleeved on the outside of the sliding connection between the driven slide tube 318 and the first auxiliary connecting tube 315 to isolate tea residue and tea soup and prevent the sliding pair from getting stuck.

[0067] The auxiliary slide tube 320 is a stainless steel hollow tube. One end of it is fixed to the middle of one side of the first auxiliary connecting tube 315, and the other end is slidably connected to the second auxiliary connecting tube 321. The upper end of the second auxiliary connecting tube 321 is fixed to the top inner wall of the mixing tank body 1, and is used to provide guidance and support for the lifting and lowering of the mixing mechanism.

[0068] It should be noted that the first auxiliary connecting pipe 315 is interconnected with the hydraulic transmission hole 316 inside the stirring rod 34, forming a fully enclosed hydraulic transmission circuit with no exposed hydraulic lines, thus preventing tea from contaminating the hydraulic oil. The first auxiliary connecting pipe 315 is connected to the pre-set vent hole inside the stirring drive shaft 32, allowing air in the hole at the sliding point between the driven slide pipe 318 and the first auxiliary connecting pipe 315 to be discharged to the outside of the stirring tank body 1 through the vent hole. Air in the hole at the sliding connection between the active slide pipe 35 and the stirring rod 34 can be discharged to the outside through the pre-set vent hole inside the stirring rod 34 that penetrates the stirring rod 34 and the stirring drive shaft 32, thus preventing air compression from affecting the smoothness of the mechanism's operation.

[0069] In this embodiment, the fully enclosed hydraulic transmission circuit can smoothly transmit the displacement force of the drive piston 313 to the driven piston 317. There is no rigid impact during the transmission process, and the lifting and lowering action is smooth. The sliding cooperation between the auxiliary slide tube 320 and the second auxiliary connecting tube 321 can ensure that the stirring mechanism always maintains coaxiality during the lifting and lowering process, avoid eccentric wear of the stirring drive shaft 32, and improve the stability of the mechanism operation.

[0070] Working principle

[0071] Initial state: The tea extraction device is in standby or initial extraction stage. Tea leaves and extraction water are added to the stirring tank body 1. The tea leaves have not yet fully absorbed water and expanded, the tea residue layer has not yet formed, the tea soup viscosity is low, and the water flow resistance on the drive auxiliary plate 38 is small. The torsion spring 310 is in the initial pre-tightened state, driving the first rotating shaft 37 to maintain the initial angle, and the drive wire rope 311 is in the relaxed state. The reset spring 314 is in the initial extended state, pushing the drive piston 313 to the lower end of the hydraulic transmission hole 316. The driven piston 317 is in the lower end of the transmission hole 316 under the pressure of hydraulic oil, driving the driven slide tube 318 to the extended state. The entire stirring mechanism is in the low position, and the stirring rod 34 and the drive auxiliary plate 38 are close to the tea leaf layer to ensure the stirring and mixing effect in the initial extraction stage.

[0072] Increased resistance triggers height adjustment: As the extraction process proceeds, the tea leaves absorb water, swell, and settle to form a tea residue layer. The viscosity of the tea soup gradually increases with the precipitation of substances such as tea polyphenols and tea polysaccharides. When the stirring mechanism rotates and drives the auxiliary drive plate 38 to contact the tea residue layer, the resistance on the auxiliary drive plate 38 increases instantaneously, overcoming the preload torque of the torsion spring 310 and causing the first rotating shaft 37 to deflect. When the first rotating shaft 37 rotates, it winds up the drive wire rope 311. The wound wire rope pulls the drive piston 313 to slide upward along the hydraulic transmission hole 316, while simultaneously compressing the return spring 314. When the drive piston 313 slides upward, it squeezes the hydraulic transmission hole 316 and the food-grade liquid inside the transmission hole 316. When the hydraulic oil pressure increases, it pushes the driven piston 317 to slide upward along the transmission hole 316. The driven piston 317 drives the driven slide tube 318 to retract upward. The driven slide tube 318 pulls the drive auxiliary plate 38, the connecting shell 36, and the active slide tube 35 to slide upward along the stirring rod 34, thereby driving the entire stirring mechanism to lift upward synchronously, realizing adaptive adjustment of the stirring height. When the first rotating shaft 37 winds the drive wire rope 311 to the set stroke, one end of the driven slide tube 318 is in contact with one end of the transmission hole 316. When the drive piston 313 compresses the return spring 314 to the lowest position, the stirring mechanism stops lifting, avoiding excessive burying of the stirring paddle into the tea residue layer, which would cause the tea leaves to break and the flavor of the tea soup to deteriorate.

[0073] Resistance disappearance and reset process: When extraction is completed, the tea residue layer is filtered out, or the viscosity of the tea soup decreases and the drive auxiliary plate 38 is removed from the tea residue layer, the resistance on the drive auxiliary plate 38 disappears, the torsion spring 310 releases the pre-tightening torque, drives the first rotating shaft 37 to deflect in the opposite direction and reset, and releases the wound drive steel wire rope 311; at this time, the reset spring 314 releases elastic potential energy, pushes the drive piston 313 to slide down and reset along the hydraulic transmission hole 316, the hydraulic oil pressure in the hydraulic transmission hole 316 decreases, and the driven piston 317 slides down and reset along the transmission hole 316 under the action of gravity and hydraulic oil suction, driving the driven slide tube 318 to extend downward, and the entire stirring mechanism falls back to the initial low position, waiting for the next extraction cycle.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art, inspired by this description, design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the scope of protection of this invention.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tea extraction device with a built-in stirrer that adaptively adjusts the height, characterized in that: The device includes a mixing tank body (1), on which a support frame (2) is installed to support the device as a whole. A stirrer height adaptive adjustment unit (3) is installed on the support frame (2) to adaptively adjust the height according to the viscosity of the tea soup, the density of the tea leaves or the height of the tea residue layer in the mixing tank body (1). A water inlet and outlet assembly (4) is also provided on the outside of the mixing tank body (1). The stirrer height adaptive adjustment unit (3) includes a stirring drive assembly for driving and a height adaptive drive assembly for adaptive adjustment according to the viscosity of the tea soup, the density of the tea leaves or the height of the tea residue layer. It also includes a height adaptive driven assembly driven by the height adaptive drive assembly.

2. The tea extraction device with built-in stirrer and adaptive height adjustment according to claim 1, characterized in that: The stirring drive assembly includes a drive servo motor (31) mounted on a support frame (2), the output end of the drive servo motor (31) is connected to a stirring drive shaft (32), a section of the stirring drive shaft (32) is connected to a connecting sleeve (33), and a stirring rod (34) is provided on the outside of the connecting sleeve (33).

3. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 2, characterized in that: The stirring drive shaft (32) is rotatably connected to the upper middle position of the stirring tank body (1), and the stirring rod (34) is provided in several sets and is evenly inclined on the outer wall of the connecting sleeve (33).

4. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 3, characterized in that: The height-adaptive drive assembly includes an active slide tube (35) that slides against the inside of the stirring rod (34). One end of the active slide tube (35) is connected to a connecting shell (36). The inner side of the connecting shell (36) is rotatably connected to a first rotating shaft (37). One end of the first rotating shaft (37) is connected to a drive auxiliary plate (38). A first smooth thin-walled sleeve (39) is provided at the connection between the first rotating shaft (37) and the connecting shell (36). A torsion spring (310) is sleeved on the outer side of one end of the first rotating shaft (37). A drive wire rope (311) is wound around the middle position of the first rotating shaft (37).

5. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 4, characterized in that: The connecting shell (36) is located in the middle of the lower inner side of the mixing tank body (1). The drive auxiliary plate (38) is initially inclined. The two ends of the torsion spring (310) are respectively fixed to the collar side of the first rotating shaft (37) and the inner wall of the connecting shell (36). The first rotating shaft (37) has two sets and is symmetrically arranged at both ends. The torsion spring (310) is located on the inner side of the connecting shell (36).

6. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 5, characterized in that: The height adaptive drive assembly also includes a guide ring (312) disposed inside the active slide tube (35), one end of the drive wire rope (311) is connected to the drive piston (313), the lower side of the drive piston (313) is connected to the return spring (314), one end of the drive wire rope (311) is fixed at the middle position of the first rotating shaft (37), and the drive wire rope (311) is disposed between two sets of torsion springs (310).

7. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 6, characterized in that: The drive wire rope (311) slides through the inner side of the guide ring (312), the drive piston (313) slides against the hole provided on the inner side of the stirring rod (34), the two ends of the return spring (314) are respectively fixed to one end of the drive piston (313) and the inner side of the stirring rod (34), and the end of the drive wire rope (311) away from the first rotating shaft (37) slides through the middle position of the lower end of the stirring rod (34).

8. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 7, characterized in that: The height-adaptive driven component includes a first auxiliary connecting pipe (315) fixed to the upper end of the connecting sleeve (33). A transmission hole (316) is provided on the inner side of the first auxiliary connecting pipe (315). A driven piston (317) is slidably connected to the inner side of the transmission hole (316). A driven slide tube (318) is connected to one end of the driven piston (317). A second smooth thin-walled sleeve (319) is provided on the outer side of one end of the driven slide tube (318). An auxiliary slide tube (320) is provided at the upper end of the connecting sleeve (33). A second auxiliary connecting pipe (321) is slidably connected to the inner side of one end of the auxiliary slide tube (320).

9. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 8, characterized in that: The end of the auxiliary slide tube (320) away from the second auxiliary connecting tube (321) is connected to the middle of one side of the first auxiliary connecting tube (315). The first auxiliary connecting tube (315) is U-shaped, and the transmission hole (316) and the hole inside the stirring rod (34) are interconnected.

10. A tea extraction device with a built-in stirrer and adaptive height adjustment according to claim 9, characterized in that: The driven slide tube (318) is slidably connected at one end away from the second smooth thin-walled sleeve (319) to a hole provided inside one end of the first auxiliary connecting tube (315). The drive auxiliary plate (38) is rotatably connected at one end away from the first rotating shaft (37) to one end away from the driven slide tube (318) and the driven piston (317). The second smooth thin-walled sleeve (319) is provided outside the connection between the drive auxiliary plate (38) and the driven slide tube (318).

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