Tea leaf extraction column structure

Abstract

The application relates to the field of tea processing equipment, in particular to a tea extraction stand structure which comprises a shell and an extraction assembly, the shell is in a cylindrical shape, one end of the shell is provided with a water inlet, the other end of the shell is provided with a flow guide pipe which is in communication with the inside of the shell, the shell is provided with the extraction assembly, the extraction assembly comprises an extraction sleeve with tea leaves, a flow guide piece and a reflux channel, the extraction sleeve comprises a throat pipe, a contraction section and an expansion section which are respectively and smoothly connected with two ends of the throat pipe, the contraction section and the expansion section both extend to the direction where the throat pipe is located, and the radius gradually decreases in the extending process, the flow guide piece is arranged downstream of the expansion section, the reflux channel is defined between the flow guide piece and the inner wall surface of the shell, the reflux channel guides the tea leaves and the extraction liquid which flow out of the expansion section back to the upstream of the contraction section to form a circulating extraction flow path. The application achieves the technical effect that the water flow and the tea leaves are subjected to extrusion and pressure loss in the extraction sleeve, the mixing effect of the tea leaves and the water is increased, and the tea extraction efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of tea processing equipment, and in particular to a tea extraction column structure. Background Technology

[0002] As people's demand for tea beverages continues to increase and their requirements for quality gradually improve, tea extraction technology is also constantly being innovated. Existing tea extraction devices, such as some extraction columns or extraction cups, usually use columnar or canister-shaped containers to extract tea by flowing water through a layer of tea leaves.

[0003] Currently, tea extraction devices simply place tea leaves inside a column or tank, relying on water flow to agitate the leaves and achieve extraction. However, if the tea leaves clump together, the water flow cannot penetrate, and the leaves cannot be fully agitated. Most of the water only contacts a portion of the leaves, while leaves piled up in the core or corners are under-extracted, resulting in wasted tea material and unstable tea quality. To address this issue, some solutions have attempted to add mechanical agitators to the extraction container. However, this only achieves localized, low-speed agitation and has limited effectiveness in breaking up stubborn tea clumps. Therefore, finding a more efficient and gentler method to achieve thorough mixing and extraction of tea leaves remains a pressing technical challenge in this field. Utility Model Content

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a tea extraction column structure.

[0005] A tea extraction column structure, comprising: The shell is cylindrical, with a water inlet at one end and a guide pipe communicating with the interior of the shell at the other end. An extraction assembly disposed within the housing is configured to form a circulating extraction flow path for circulating tea leaves and extractant. The extraction assembly includes: The extraction sleeve is provided with a constriction section, a throat and an expansion section in sequence along the flow direction of the extract, which are used to impact the flowing tea leaves to force dispersion. A flow guide is disposed downstream of the expansion section, and The reflux channel, defined between the guide member and the inner wall of the housing, guides the tea leaves and extract flowing out of the expansion section back to the upstream of the contraction section to form the circulating extraction flow path.

[0006] By adopting the above method, tea leaves are placed in the extraction sleeve. When the water flows with the tea leaves from the contraction section to the expansion section, both the water and the tea leaves are squeezed. During the squeezing process, the concentrated juice inside the tea leaves is squeezed out. After passing through the expansion section, the tea leaves lose pressure and become fluffy and dispersed. The water flow forms a local vortex in the expansion section, causing the tea leaves to tumble. The tea leaves enter the return channel and then re-enter the contraction section, allowing the tea leaves to be repeatedly squeezed and tumbled, increasing the mixing effect between the tea leaves and water.

[0007] In one embodiment, the circulating extraction path is further provided with an upper filter and a lower filter in a circumferential manner to confine the tea leaves within the circulating extraction path.

[0008] By adopting the above solution, the purified water can be filtered again through the setting of the upper and lower filters. At the same time, the tea leaves can be confined within the extraction sleeve to prevent them from entering the water inlet and the guide pipe. Meanwhile, the upper filter will squeeze the tea leaves under the action of the water flow, further squeezing out the juice inside the tea leaves.

[0009] In one embodiment, the guide includes a funnel-shaped guide portion with an opening facing the outlet, for efficiently collecting and guiding the tea leaves and extract flowing out from the expansion section into the return channel.

[0010] By adopting the above scheme, when the water flow and tea leaves pass through the expansion section, they will impact the guide part of the guide component. The guide part will guide the water flow and tea leaves to the side of the extraction sleeve, enhancing the dispersion effect of the tea leaf clusters and making it easier to form vortices.

[0011] In one embodiment, the flow guide further includes a filter section surrounding the flow guide, the upper filter screen is located in the filter section, and a reflux inlet communicating with the reflux channel is formed between the flow guide and the extraction sleeve.

[0012] By adopting the above scheme, water can flow through the guide, while the guide can intercept tea leaves.

[0013] In one embodiment, the flow guide further includes a reflux section, which is annular, with its inner wall surface fixed to the upper filter screen, and the extraction sleeve fixed to the side of the reflux section opposite to the flow guide tube.

[0014] By adopting the above scheme, after passing through the expansion section, the tea leaves will be guided to the return channel by the guide component, and then flow back to the bottom of the extraction sleeve. Since the water flow velocity at the bottom of the extraction sleeve is greater, the tea leaves will be adsorbed to the bottom of the extraction sleeve and guided back to the contraction section by the water flow.

[0015] In one embodiment, the portion of the reflux section near the inner wall of the housing is funnel-shaped with an opening facing the water inlet.

[0016] By adopting the above scheme, the part of the reflux section that passes through the inner wall of the shell is set into a funnel shape, which can guide the tea leaves into the reflux channel.

[0017] In one embodiment, the flow guide is provided with a plurality of stirring blades on the side facing the water inlet, the gap between the lower filter screen and the extraction sleeve forms a reflux outlet communicating with the reflux channel, and the side of the lower filter screen away from the extraction sleeve is provided with a first driving member, the first driving member including a first rotating shaft connected to the flow guide.

[0018] By adopting the above scheme, the first driving component drives the guide section to rotate, and the stirring blades on the guide section can stir the tea leaves, thereby enhancing the extraction efficiency.

[0019] In one embodiment, a plurality of stirring blades are arranged in a circumferential array on the outer peripheral surface of the flow guide. Each stirring blade extends outward from the central region of the flow guide at an angle, and the angle direction is opposite to the rotation direction of the flow guide. When the flow guide rotates, the stirring blades push the tea leaves toward the return channel, and the edge of the return channel slides along the inner wall surface of the housing.

[0020] By adopting the above scheme, the stirring blades not only stir the tea leaves during rotation, but also push the tea leaves towards the reflux channel. Under the action of the thrust, the tea leaves quickly enter the reflux channel. At the same time, under the action of centrifugal force, the tea leaves move along the reflux section towards the reflux outlet.

[0021] In one embodiment, the flow guide is provided with a fixing plate with multiple through holes on the side opposite to the extraction sleeve. The fixing plate is provided with a second driving member, which is connected to a second rotating shaft. The outer circumferential surface of the second rotating shaft is provided with a spiral flow guide plate.

[0022] By adopting the above scheme, the second driving component drives the spiral guide vane to rotate, which can extract the liquid in the extraction sleeve and accelerate the flow of the liquid.

[0023] In one embodiment, the lower filter screen is detachably connected to the extraction assembly via a quick-release assembly to facilitate cleaning or replacement of the tea leaves in the circulating extraction path. The quick-release assembly includes a mounting ring and a plurality of wedges driven by elastic elements and used to lock the lower filter screen to the mounting ring.

[0024] By adopting the above method, the lower filter screen can be quickly removed, allowing the tea leaves in the extraction sleeve to be poured out and replaced with new tea leaves.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Place the tea leaves in the extraction sleeve. As the water flows with the tea leaves from the contraction section to the expansion section, both the water and the tea leaves will be squeezed. During the squeezing process, the concentrated juice inside the tea leaves will be squeezed out. After passing through the expansion section, the tea leaves will lose pressure and become fluffy and dispersed. The water flow will form a local vortex in the expansion section, causing the tea leaves to tumble. The tea leaves will enter the return channel and then re-enter the contraction section, so that the tea leaves can be repeatedly squeezed and tumbled, increasing the mixing effect between the tea leaves and water.

[0026] 2. After passing through the expansion section, the tea leaves are guided to the return channel by the guide component, and then flow back to the bottom of the extraction sleeve. Because the water flow rate is higher at the bottom of the extraction sleeve, the tea leaves will be adsorbed to the bottom of the extraction sleeve and guided back to the contraction section by the water flow, thus achieving the effect of circulation and stirring.

[0027] 3. While the stirring blades are rotating, they also push the tea leaves towards the reflux channel. Under the force of the thrust, the tea leaves quickly enter the reflux channel. At the same time, under the action of centrifugal force, the tea leaves move along the reflux section towards the reflux outlet. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a tea extraction column structure provided in this application.

[0029] Figure 2 This is a cross-sectional view of a tea extraction column structure provided in this application.

[0030] Figure 3 yes Figure 2 An enlarged view of region A.

[0031] Figure 4 This is a cross-sectional view of the flow guide.

[0032] Figure 5 yes Figure 2 A magnified view of region B.

[0033] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Inlet; 12. Guide pipe; 2. Extraction assembly; 21. Extraction sleeve; 211. Throat; 212. Contraction section; 213. Expansion section; 22. Upper filter screen; 23. Lower filter screen; 231. First driving component; 232. First rotating shaft; 24. Guide component; 241. Guide section; 242. Filter section; 243. Return section; 244. Stirring blade; 25. Return channel; 251. Return inlet; 252. Return outlet; 26. Fixing plate; 27. Second driving component; 271. Second rotating shaft; 272. Spiral guide vane; 28. Quick-release assembly; 281. Mounting ring; 2811. Slot; 2812. Mounting plate; 282. Wedge; 2821. Wedge surface; 283. Elastic component. Detailed Implementation

[0034] This application provides a tea extraction column structure that allows water and tea leaves to mix thoroughly.

[0035] Please see Figure 1-2 , Figure 1 This is a schematic diagram of a tea extraction column structure provided in this application. Figure 2 The arrows in the diagram indicate the movement trajectory of the tea leaves, i.e., the circulating extraction flow path. The tea extraction column structure provided in this application includes a shell 1 and an extraction component 2, wherein the extraction component 2 is located inside the shell 1. The two work together to achieve the beneficial effects of efficiently extracting tea juice and improving the mixing effect of tea and water. This is because the shell 1 provides a relatively enclosed space for the extraction process, while the extraction component 2 performs specific treatments on the tea leaves, allowing the juice inside the tea leaves to dissolve better into the water.

[0036] The shell 1 is cylindrical, a shape that facilitates stable water flow inside. One end of the shell 1 has a water inlet 11, which can be a circular opening made of stainless steel to ensure smooth water entry into the shell 1. The water inlet 11 can also be other shapes, such as square, and made of materials such as plastic, as long as it fulfills the function of water intake. The other end of the shell 1 has a guide tube 12 communicating with the interior of the shell 1. The guide tube 12 can be straight and also made of stainless steel; its function is to guide the extracted tea water out. The guide tube 12 can also be designed as curved to adapt to different usage environments, and the material can be changed according to actual needs.

[0037] The extraction component 2 includes an extraction sleeve 21 containing tea leaves. The extraction sleeve 21 includes a throat 211 and a constriction section 212 and an expansion section 213 smoothly connected to both ends of the throat 211. Both the constriction section 212 and the expansion section 213 extend towards the throat 211 and gradually decrease in diameter. The throat 211 can be cylindrical or other shapes, such as elliptical, and can be made of plastic. The constriction section 212 and the expansion section 213 are shaped like trumpets and are smoothly connected to the throat 211, allowing for a smooth transition between water and tea leaves. When water carrying tea leaves flows from the constriction section 212 to the expansion section 213, both the water and the tea leaves are compressed. During this compression, the concentrated juice inside the tea leaves is squeezed out. After passing through the expansion section 213, the tea leaves lose pressure and become fluffy. The water flow forms a local vortex within the expansion section 213, causing the tea leaves to tumble and increasing the mixing effect between the tea leaves and water.

[0038] An upper filter 22 is provided at the end of the extraction sleeve 21 near the guide tube 12. The upper filter 22 can be a circular metal filter with appropriately sized mesh openings, capable of both further filtering the purified water and confining the tea leaves within the extraction sleeve 21 to prevent them from entering the guide tube 12. The upper filter 22 can also be made of plastic, and its shape can be adjusted according to actual needs. A lower filter 23 is provided at the end of the extraction sleeve 21 near the water inlet 11. The lower filter 23 can also be a circular metal filter, serving a similar function to the upper filter 22: preventing tea leaves from entering the water inlet 11. Simultaneously, under the action of water flow, the upper filter 22 will exert a squeezing effect on the tea leaves, further squeezing out the juice from within the tea leaves.

[0039] The extraction sleeve 21 has a guide member 24 coaxial with the guide tube 12 at one end. The guide member 24 includes a guide section 241, which is funnel-shaped with its opening facing the guide tube 12. The guide section 241 can be made of stainless steel. This shape can guide the water flow and tea leaves to the side of the extraction sleeve 21, enhancing the dispersion of the tea leaves and making it easier to form eddies. The guide section 241 can also be made of plastic or other materials, as long as it can achieve the function of guiding the water flow and tea leaves.

[0040] Please refer to the following: Figure 3-4 , Figure 3 yes Figure 2 A magnified view of region A. Figure 3 The arrows in the image represent the movement trajectory of the tea leaves. Figure 4The arrows indicate the rotation direction of the guide member 24. The guide member 24 also includes a filter section 242 surrounding the guide section 241, with the upper filter screen 22 located in the filter section 242. The filter section 242 can be annular and can be made of the same material as the guide section 241. It allows water to flow through the guide member 24 while simultaneously allowing the guide member 24 to intercept tea leaves. The guide member 24 also includes a return section 243, which is annular. The inner wall of the return section 243 is fixed to the upper filter screen 22. The extraction sleeve 21 is fixed to the side of the return section 243 facing away from the guide tube 12. The outer peripheral surface of the guide section 241 and the inner wall of the housing 1 form a return channel 25. The gap between the guide member 24 and the extraction sleeve 21 forms a return inlet 251. The return section 243 can be an annular component made of stainless steel, and its function is to fix the upper filter screen 22 and the extraction sleeve 21. The portion of the reflux section 243 near the inner wall of the housing 1 is funnel-shaped with its opening facing the inlet 11. The edge of the reflux section 243 extends towards the inlet 11, and the extended end connects to the inner wall of the housing 1. A bearing is provided at the connection point, allowing the reflux section 243 and the housing 1 to rotate relative to each other. This funnel-shaped design guides the tea leaves into the reflux channel 25. The reflux section 243 can also be made of other materials, such as plastic.

[0041] The flow guide 24 is fixed to a side of the extraction sleeve 21 opposite to the fixed plate 26. The fixed plate 26 is equipped with a second driving component 27, which can be a small motor connected to a second rotating shaft 271. A spiral guide vane 272 is provided on the outer circumference of the second rotating shaft 271. The fixed plate 26 has multiple through holes for water flow. The second driving component 27 drives the spiral guide vane 272 to rotate, thereby drawing liquid from the extraction sleeve 21 and accelerating liquid flow. The second driving component 27 can also be other types of power devices, such as a pneumatic motor.

[0042] Multiple stirring blades 244 are provided on the side of the flow guide 241 facing the water inlet 11. These blades are arranged in a circumferential array on the outer periphery of the flow guide 241. Each blade extends outward from the center of the flow guide 241 at an angle, with the angle opposing the rotation direction of the flow guide 241. The stirring blades 244 can be sheet-like structures made of stainless steel. The flow guide 241 is connected to a first driving member 231 via a first rotating shaft 232. The first driving member 231 can be a small motor. When the flow guide 241 rotates, the blades push the tea leaves towards the return channel 25. Simultaneously, under centrifugal force, the tea leaves move along the return section 243 towards the return outlet 252. The gap between the lower filter screen 23 and the extraction sleeve 21 forms the return outlet 252, which communicates with the return channel. The stirring blades 244 can also be made of materials such as plastic, and their shapes can be varied. In this application, the stirring blade 244 can also be rib-shaped or block-shaped. The stirring blade 244 can extend towards the return section 243 until it connects with the return section 243, thereby increasing the stirring area of ​​the stirring blade 244. At the same time, the stirring blade 244 can also directly guide the tea leaves to the return section 243. The upper filter screen 22, the guide section 241, and the side of the return section 243 facing the water inlet 11 are all located on the same plane.

[0043] The lower filter screen 23 is equipped with a quick-release assembly 28, which includes a mounting ring 281, a wedge 282, and an elastic element 283. The inner wall of the mounting ring 281 has a slot 2811 that mates with the outer wall of the wedge 282. The elastic element 283 is located within the slot 2811. The surface of the wedge 282 facing the water inlet 11 is a wedge surface 2821. Multiple mounting plates 2812 are located on the side of the mounting ring 281 away from the water inlet 11. The mounting plates 2812 are fixed to the extraction sleeve 21, and the return outlet 252 is located between the mounting plates 2812. The mounting ring 281 can be a ring-shaped component made of metal, the wedge 282 can be a wedge-shaped block made of metal, and the elastic element 283 can be a spring. When it is necessary to remove the lower filter screen 23, the wedge 282 is squeezed, causing it to contract under the action of the elastic element 283, thus allowing the lower filter screen 23 to be quickly removed, the tea leaves in the extraction sleeve 21 to be poured out, and new tea leaves to be replaced. The mounting ring 281 and wedge 282 can also be made of materials such as plastic.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tea extraction column structure, characterized in that, include: The shell (1) is cylindrical, with an inlet (11) at one end and a guide pipe (12) communicating with the interior of the shell (1) at the other end. An extraction assembly (2) disposed within the housing (1) is configured to form a circulating extraction path for circulating tea leaves and extractant. The extraction assembly (2) includes: The extraction sleeve (21) is provided with a constriction section (212), a throat (211) and an expansion section (213) in sequence along the flow direction of the extract liquid, which are used to impact the flowing tea clumps to force dispersion; The flow guide (24) is disposed downstream of the expansion section (213), and The reflux channel (25), defined between the guide member (24) and the inner wall of the housing (1), guides the tea leaves and extract flowing out of the expansion section (213) back to the upstream of the contraction section (212) to form the circulating extraction path.

2. The tea extraction column structure according to claim 1, characterized in that: The circulating extraction path is also provided with an upper filter (22) and a lower filter (23) in a circumferential manner to confine the tea leaves in the circulating extraction path.

3. The tea extraction column structure according to claim 2, characterized in that: The guide member (24) includes a funnel-shaped guide section (241) with an opening facing the liquid outlet, for efficiently collecting and guiding the tea leaves and extract flowing out of the expansion section (213) into the return channel (25).

4. The tea extraction column structure according to claim 3, characterized in that: The flow guide (24) also includes a filter section (242) surrounding the flow guide section (241), the upper filter screen (22) is located in the filter section (242), and a reflux inlet (251) communicating with the reflux channel (25) is formed between the flow guide section (241) and the extraction sleeve (21).

5. The tea extraction column structure according to claim 3, characterized in that: The guide member (24) also includes a reflux section (243), which is annular. The inner wall of the reflux section (243) is fixed to the upper filter screen (22), and the extraction sleeve (21) is fixed on the side of the reflux section (243) away from the guide tube (12).

6. The tea extraction column structure according to claim 5, characterized in that: The portion of the reflux section (243) near the inner wall of the housing (1) is funnel-shaped with an opening facing the inlet (11).

7. The tea extraction column structure according to claim 5, characterized in that: The flow guide (241) has a plurality of stirring blades (244) on the side facing the water inlet (11). The gap between the lower filter (23) and the extraction sleeve (21) forms a return outlet (252) that communicates with the return channel (25). The lower filter (23) has a first driving member (231) on the side away from the extraction sleeve (21). The first driving member (231) includes a first rotating shaft (232) connected to the flow guide (241).

8. The tea extraction column structure according to claim 7, characterized in that: Multiple stirring blades (244) are arranged in a circumferential array on the outer peripheral surface of the flow guide (241). Each stirring blade (244) extends outward from the central region of the flow guide (241) at an angle, and the angle is opposite to the rotation direction of the flow guide (241). When the flow guide (241) rotates, the stirring blades (244) push the tea leaves toward the return channel (25). The edge of the return section (243) slides along the inner wall surface of the shell (1).

9. The tea extraction column structure according to claim 3, characterized in that: The flow guide (24) is provided with a fixing plate (26) with multiple through holes on the side opposite to the extraction sleeve (21). The fixing plate (26) is provided with a second driving member (27). The second driving member (27) is connected to a second rotating shaft (271). The outer circumferential surface of the second rotating shaft (271) is provided with a spiral flow guide plate (272).

10. The tea extraction column structure according to claim 2, characterized in that: The lower filter (23) is detachably connected to the extraction assembly (2) via a quick-release assembly (28) to facilitate cleaning or replacement of the tea leaves in the circulating extraction path. The quick-release assembly (28) includes a mounting ring (281) and a plurality of wedges (282) driven by elastic elements (283) and used to lock the lower filter (23) to the mounting ring (281).

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