Coffee extraction device

Abstract

The invention discloses a coffee extraction device, and relates to the technical field of coffee extraction, a cup body assembly comprises a base, an integrated inner container, a powder bowl, a sealing piece and an end cover, and a gap exists between the sealing piece and the integrated inner container to form a buffer cavity; the end cover is provided with a water injection port and a mounting port, the water injection port is detachably provided with a sealing piece, and the mounting port is provided with an air pressure pipe and a pressure gauge; the flow slowing assembly comprises a flow guide part and a flow slowing part, a flow guide channel is formed in the flow guide part, and a plurality of flow slowing channels communicating with the flow guide channel are formed in the flow slowing part in the circumferential direction; a buffering cavity is formed between the transparent sealing piece and the integrated inner container, so that the amount of injected hot water can be observed and controlled, and meanwhile heat can be insulated through the sealing piece; an external air source supplies air to the interior of the integrated inner container in a pressurized mode, air pressure is controlled so that hot water can evenly flow into the coffee powder bowl from the flow guide channel through the slow flow channel, the pressurized water flow rapidly impacts the cake-shaped coffee powder, and therefore flavor substances of the coffee powder are extracted.

Description

Technical Field

[0001] This invention relates to the field of coffee extraction technology, and more specifically to a coffee extraction device. Background Technology

[0002] Coffee machines extract flavor compounds from coffee powder through heating, pressurization, and filtration to create coffee beverages. Factors affecting coffee extraction include temperature, pressure, and water flow rate. Existing pneumatic coffee machines have become a new type of portable, lower-energy-consumption coffee extraction product. They can provide suitable pressure through an air pump or other safe and reliable small compressed air sources, with 9 bar being generally optimal. This allows for the timely addition of a small amount of hot water to the machine's pressurized water tank via a standard interface. By controlling the pressure, the water pressure and flow rate can be controlled. The liquid flows through a filter bowl filled with roasted coffee bean powder, and the high-temperature, high-pressure, slow-speed extraction process captures the concentrated coffee liquid. Unlike traditional household and commercial semi-automatic and fully automatic tabletop coffee machines, which are limited to fixed application scenarios, these new pneumatic coffee machines are not restricted to fixed mains power supplies or bulky, high-power energy storage power supplies. A single extraction to prepare coffee concentrate requires only a very small amount of water heated to a controlled temperature, and with the help of a portable, high-density energy storage gas source, it is possible to make a high-quality cup of coffee anytime, anywhere.

[0003] However, existing pneumatic coffee machines have the following problems during use: 1. The outer shell and inner tank are opaque, making it impossible to observe the water level in the water tank. Adding hot water requires additional auxiliary metering devices, and there is a risk of scalding from overflow. Dust on the top cover can contaminate the water, and overflowing water touching the metal cap / shell can cause rapid cooling. 2. During extraction, the high-pressure water flow cannot be limited or dispersed, and the coffee grounds cannot be slowly and rapidly impacted. This results in the water only partially breaking down the coffee grounds, leading to insufficient extraction and waste. When the pressure chamber releases pressure, fine coffee grounds may even backflow into the water tank. The simple water filter needs to be completely disassembled and cleaned each time, causing inconvenience. 3. The machine lacks heat insulation, requiring repeated flipping and lifting of the machine and laborious unscrewing of the cap lock, posing a high risk of scalding and falls. Summary of the Invention

[0004] The main objective of this invention is to provide a coffee extraction device to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides a coffee extraction apparatus, comprising: The cup assembly includes a base and an integrated inner liner detachably connected to the base. The base has a detachable water distribution screen inside, and a detachable closure sleeve fitted onto the outside of the integrated inner liner. A first sealing element abuts against the water distribution screen inside the base. The integrated inner liner has a detachable end cap, and a second sealing element is provided between the integrated inner liner and the base. A third sealing element is provided between the closure element and the base. Both the closure element and the integrated inner liner are made of transparent material, and a gap exists between the closure element and the integrated inner liner to form a buffer cavity. The end cap engages with the integrated inner liner and the closure element, and a locking element is provided between the end cap and the base to stably connect the integrated inner liner, the closure element, and the base. A fourth sealing element is provided between the end cap and the integrated inner liner and the closure element. The end cap has a water inlet and an installation port. The water inlet has a detachable sealing element. The installation port has a pressure pipe and a pressure gauge. The flow-regulating component includes a flow guide disposed within an integrated inner liner and a flow-regulating component disposed on the flow guide; the flow guide has a flow channel inside; and the flow-regulating component has multiple sets of flow-regulating channels communicating with the flow channel along its circumferential direction.

[0006] As a further improvement of the present invention, the base is provided with a snap-fit ​​cavity and a first sealing groove communicating with the snap-fit ​​cavity; the inner diameter of the snap-fit ​​cavity is larger than the inner diameter of the first sealing groove, the snap-fit ​​cavity and the first sealing groove are coaxially arranged, and multiple sets of snap-fit ​​blocks with increasing thickness are spaced apart on the inner wall of the snap-fit ​​cavity; the base is provided with an installation cavity connected to the first sealing groove, and the end of the base away from the installation cavity is opened to form a placement opening; the inner diameter of the installation cavity is smaller than the inner diameter of the first sealing groove.

[0007] As a further improvement of the present invention, the first sealing element includes a first sealing ring installed in the first sealing groove; the snap-fit ​​cavity is provided with a detachable support bowl, the support bowl is provided with a locking block with increasing thickness that cooperates with the snap-fit ​​block, the support bowl is provided with a powder bowl, the support bowl rotates under the action of external force so that the locking block abuts against the snap-fit ​​block, thereby causing the powder bowl to abut against the first sealing ring.

[0008] As a further improvement of the present invention, the outer wall of the integrated inner liner is provided with a snap-fit ​​protrusion and the interior is provided with a holding cavity; the bottom of the integrated inner liner is provided with an arc-shaped guide groove; the inner wall of the mounting cavity is provided with a second sealing groove; the second sealing element includes a second sealing ring installed in the second sealing groove; the bottom of the integrated inner liner is located in the mounting cavity and abuts against the second sealing ring; the snap-fit ​​protrusion is located on the base.

[0009] As a further improvement of the present invention, the sealing member includes a sealing cover disposed on the base; there is a gap between the sealing cover and the integrated inner liner to form a buffer cavity, and a third sealing groove coaxial with the mounting cavity is provided on the top of the base; the third sealing member includes a third sealing ring installed in the third sealing groove.

[0010] As a further improvement of the present invention, the bottom end of the end cap is provided with a fourth sealing groove and a fifth sealing groove with different inner diameters, respectively; the fourth sealing element includes a fourth sealing ring located in the fourth sealing groove and the fifth sealing groove respectively; the end of the integrated inner liner and the end of the sealing cover away from the base are respectively located in the fourth sealing groove and the fifth sealing groove.

[0011] As a further improvement of the present invention, the bottom end of the end cap is provided with a first countersunk groove and a second countersunk groove that are respectively connected to the fourth sealing groove and the fifth sealing groove.

[0012] As a further improvement of the present invention, the locking component includes a locking rod disposed on the base and a locking cap located on the end cover; the locking rod passes through the end cover and is connected to the locking cap so as to abut the end cover against the top of the closure cover and the one-piece inner liner.

[0013] As a further improvement of the present invention, the water inlet is provided with two sets of connecting blocks with increasing thickness, the thickness of the two sets of connecting blocks increasing in opposite directions; the sealing component includes a sealing disc and two sets of sealing blocks disposed on the sealing plate; the sealing disc is provided with a sealing handle, and the thickness of the two sets of sealing blocks increases progressively; the sealing disc rotates under the action of external force to make the sealing blocks and connecting blocks engage and fix the relative position of the sealing disc and the end cap; the mounting port is provided with a mounting bottom cover and a mounting top cover that is detachably connected to the mounting bottom cover; a fifth sealing ring is provided between the mounting top cover and the end cap, and a connecting channel is provided on the mounting top cover; the air pressure pipe and pressure gauge are detachably connected to the connecting channel.

[0014] As a further improvement of the present invention, the flow guide includes a flow guide column disposed in the integrated inner liner and a sealing column disposed at the bottom of the integrated inner liner; the flow guide column and the sealing column are detachably connected; the flow guide channel is located inside the flow guide column; the bottom of the integrated inner liner is provided with an installation channel, and the inner wall of the installation channel is provided with multiple sets of slow-flow grooves.

[0015] The beneficial effects of this invention are reflected in: The locking mechanism connects the sealing element and the integrated inner tank to the base and end cap as a whole, forming a buffer cavity between the transparent sealing element and the integrated inner tank. This allows for observation and control of the injected hot water volume while providing insulation through the sealing element. The buffer cavity is further sealed by a second, third, and fourth sealing element, improving the insulation performance of the sealing element. Observing the presence of water vapor in the buffer cavity allows for monitoring of whether the second, third, and fourth sealing elements are aging or leaking, or the overall installation quality. An air pressure pipe connects to an external air source to pressurize the integrated inner tank. The air pressure is controlled by a pressure gauge, allowing hot water to flow evenly into the coffee bowl from the guide channel, through the slow-flow channel, and the water distribution network. The gradually pressurized water flow moistens the coffee grounds in the coffee bowl without disturbing the evenly distributed coffee grounds, thereby extracting the flavor compounds from the coffee grounds. By controlling the temperature, pressure, and water flow rate during coffee brewing, the quality of coffee extraction is improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a coffee extraction device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a coffee extraction device according to the present invention; Figure 3 This is a schematic diagram of the base structure of a coffee extraction device according to the present invention; Figure 4 This is a schematic diagram of the integrated inner tank structure of a coffee extraction device according to the present invention; Figure 5 This is a schematic diagram of the end cap structure of a coffee extraction device according to the present invention; Figure 6 This is a schematic diagram of the flow-retarding component structure of a coffee extraction device according to the present invention; Figure 7 This is a schematic diagram of the sealing component structure of a coffee extraction device according to the present invention; Figure 8 This is a bottom view of the base structure of a coffee extraction device according to the present invention; Figure 9 This is a schematic diagram of the support bowl structure of a coffee extraction device according to the present invention; Explanation of reference numerals in the attached figures: 1. Base; 2. Integrated inner liner; 201. Snap-fit ​​boss; 202. Filling cavity; 203. Guide groove; 204. Filling cylinder; 205. Mounting base; 3. Water distribution network; 4. Sealing component; 401. Sealing cover; 5. First sealing component; 6. End cap; 7. Second sealing component; 8. Third sealing component; 9. Buffer cavity; 10. Locking component; 1001. Locking rod; 1002. Locking cap; 11. Fourth sealing component; 12. Water inlet; 13. Mounting port; 14. Sealing component; 1401. Sealing plate; 1402. Sealing block; 1403. Sealing handle; 15. Air pressure pipe; 16. Pressure gauge; 17. Flow guide component; 1701. Flow guide column; 1702. Upper limit plate; 18. Flow slowing component; 1801. End sealing column; 1802. Lower limit plate; 180 3. Guide hole; 19. Guide channel; 20. Slow flow channel; 21. Snap-fit ​​cavity; 22. First sealing groove; 23. Snap-fit ​​block; 24. Mounting cavity; 25. Placement port; 26. First snap-fit ​​platform; 27. Second snap-fit ​​platform; 28. Support bowl; 29. ​​Locking block; 30. Handle; 31. Second sealing groove; 32. Third sealing groove; 33. Fourth sealing groove; 34. Fifth sealing groove; 35. Locking screw hole; 36. Through hole; 37. Countersunk hole; 38. Connecting block; 39. Mounting bottom cover; 40. Mounting top cover; 41. Fifth sealing ring; 42. Connecting channel; 43. Connecting pipe; 44. Sixth sealing groove; 45. Slow flow groove; 46. Mounting channel; 47. First groove; 48. Second groove; 49. Sixth sealing ring; 50. Seventh sealing ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this invention. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0018] In one embodiment, see Figure 1 The present invention provides a coffee extraction device, comprising a cup assembly and a slow-flow assembly.

[0019] The cup assembly includes a base 1 and an integrated inner liner 2 detachably connected to the base 1. A water distribution mesh 3 is detachably installed inside the base 1. A closure 4, fitted onto the outside of the integrated inner liner 2, is movably mounted on the base 1. A first sealing element 5 abuts against the water distribution mesh 3 inside the base 1. An end cap 6 is detachably mounted on the integrated inner liner 2. A second sealing element 7 is provided between the integrated inner liner 2 and the base 1. A third sealing element 8 is provided between the closure 4 and the base 1. Both the closure 4 and the integrated inner liner 2 are made of transparent material, and a buffer cavity 9 is formed between the closure 4 and the integrated inner liner 2. The end cap 6 is engaged with both the integrated inner liner 2 and the closure 4. A locking element 10 is provided between the end cap 6 and the base 1 to stably connect the integrated inner liner 2, the sealing element 4 and the base 1. A fourth sealing element 11 is provided between the end cap 6 and the integrated inner liner 2 and the sealing element 4 respectively. The end cap 6 is provided with a water inlet 12 and an installation port 13. A sealing element 14 is detachably provided on the water inlet 12. An air pressure pipe 15 and a pressure gauge 16 are provided on the installation port 13. The slow flow assembly includes a flow guide 17 provided in the integrated inner liner 2 and a slow flow element 18 provided on the flow guide 17. A flow guide channel 19 is provided inside the flow guide 17. Multiple slow flow channels 20 connected to the flow guide channel 19 are provided on the slow flow element 18 along the circumference.

[0020] Further, see Figure 2 , 3 4. The base 1 has a snap-fit ​​cavity 21 and a first sealing groove 22 communicating with the snap-fit ​​cavity 21. The inner diameter of the snap-fit ​​cavity 21 is larger than the inner diameter of the first sealing groove 22. The snap-fit ​​cavity 21 and the first sealing groove 22 are coaxially arranged. Multiple sets of snap-fit ​​blocks 23 with increasing thickness are spaced apart on the inner wall of the snap-fit ​​cavity 21. The base 1 has an installation cavity 24 connected to the first sealing groove 22. The end of the base 1 away from the installation cavity 24 is opened to form a placement opening 25. The inner diameter of the installation cavity 24 is smaller than the inner diameter of the first sealing groove 22.

[0021] Preferably, the base 1 is a hollow cylinder with one end open, and the open end of the base 1 forms a placement opening 25.

[0022] Preferably, the snap-fit ​​block 23 is a wedge-shaped block, and the snap-fit ​​block 23 is located on the inner wall adjacent to the placement opening 25.

[0023] Preferably, a first snap-fit ​​platform 26 is provided between the snap-fit ​​cavity 21 and the first sealing groove 22, and a second snap-fit ​​platform 27 is provided between the first sealing groove 22 and the mounting cavity 24.

[0024] Preferably, the base 1 is made of E304 stainless steel. The mounting cavity 24, the first sealing groove 22, the snap-fit ​​cavity 21, the snap-fit ​​block 23, and the placement opening 25 are integrally machined on the cylindrical base 1 by machining (milling machine, etc.) to improve the overall strength.

[0025] Further, see Figure 2 ,3 9. The first sealing element 5 includes a first sealing ring installed in the first sealing groove 22. The snap-fit ​​cavity 21 is provided with a detachable support bowl 28. The support bowl 28 is provided with a locking block 29 of increasing thickness that cooperates with the snap-fit ​​block 23. The support bowl 28 is provided with a powder bowl 2801. The support bowl 28 rotates under the action of external force so that the locking block 29 abuts against the snap-fit ​​block 23, thereby making the powder bowl 2801 abut against the first sealing ring.

[0026] Preferably, the first sealing ring is made of silicone, and the thickness of the first sealing ring is the same as the distance between the first retaining platform 26 and the second retaining platform 27.

[0027] Preferably, the support bowl 28 is provided with a handle 30. Both the support bowl 28 and the handle 30 adopt a standard E61 handle 30 shell. The powder bowl 2801 is placed inside the support bowl 28. The open end of the powder bowl 2801 protrudes outward and is located at the top of the support bowl 28. Holding the handle 30, the support bowl 28 and the powder bowl 2801 are placed into the placement opening 25. After the locking block 29 and the snap-fit ​​block 23 are misaligned, the powder bowl 2801 can be moved upward. Rotating the handle 30 causes the locking block 29 to rotate, and the locking block 29 snaps into the snap-fit ​​block 23. Since the thickness of the locking block 29 and the snap-fit ​​block 23 both increase, when the locking block 29 moves upward along the snap-fit ​​block 23, the powder bowl 2801 moves upward and abuts against the first sealing ring, completing the installation of the powder bowl 2801.

[0028] Further, see Figure 2 , 4 The outer wall of the integrated inner liner 2 is provided with a snap-fit ​​boss 201 and the interior is provided with a holding cavity 202. The bottom of the inner wall of the integrated inner liner 2 is provided with an arc-shaped guide groove 203. The inner wall of the mounting cavity 24 is provided with a second sealing groove 31. The second sealing element 7 includes a second sealing ring installed in the second sealing groove 31. The bottom of the integrated inner liner 2 is located in the mounting cavity 24 and abuts against the second sealing ring. The snap-fit ​​boss 201 is located on the base 1.

[0029] Preferably, the integrated inner liner 2 is made of PPSU pressure-bearing integrated liner. The integrated inner liner 2 includes an upper holding cylinder 204 and a lower mounting base 205 connected to the holding cylinder 204. The outer diameter of the holding cylinder 204 is larger than the outer diameter of the mounting base 205, and a snap-fit ​​boss 201 is formed at the connection between the two. The mounting base 205 is clearance-fitted with the mounting cavity 24. After the mounting base 205 is inserted into the mounting cavity 24, the second sealing ring abuts and seals against the outer wall of the mounting base 205, and the snap-fit ​​boss 201 abuts against the top of the second snap-fit ​​platform 27.

[0030] Preferably, there is a smooth transition between the container cavity 202 and the guide groove 203.

[0031] Further, see Figure 1 , 2The sealing component 4 includes a sealing cover 401 disposed on the base 1. There is a gap between the sealing cover 401 and the integrated inner liner 2 to form a buffer cavity 9. The top of the base 1 is provided with a third sealing groove 32 coaxial with the mounting cavity 24. The third sealing component 8 includes a third sealing ring installed in the third sealing groove 32.

[0032] Preferably, the sealing cover 401 is made of PC material and is a hollow cylinder with openings at both ends. The bottom end of the sealing cover 401 is inserted into the third sealing groove 32 and abuts against the third sealing ring.

[0033] Further, see Figure 1 , 5 The bottom end of the end cap 6 is provided with a fourth sealing groove 33 and a fifth sealing groove 34 with different inner diameters, respectively. The fourth sealing element 11 includes a fourth sealing ring located in the fourth sealing groove 33 and the fifth sealing groove 34 respectively. The end of the integrated inner liner 2 and the sealed cover 401 away from the base 1 is located in the fourth sealing groove 33 and the fifth sealing groove 34 respectively.

[0034] Preferably, the end cap 6 is made of E304 stainless steel.

[0035] Further, see Figure 1 , 2 The locking component 10 includes a locking rod 1001 disposed on the base 1 and a locking cap 1002 located on the end cover 6. The locking rod 1001 passes through the end cover 6 and is connected to the locking cap 1002 so as to abut the end cover 6 against the top of the closed cover 401 and the integrated inner liner 2.

[0036] Preferably, the base 1 has three sets of locking screw holes 35 spaced circumferentially, located between the third sealing groove 32 and the mounting groove, so that the locking screw is located in the buffer cavity 9. The locking screw is threadedly connected to the locking screw hole 35. The end cap 6 has three sets of through holes 36 corresponding to the locking screw holes 35. The through holes 36 have countersunk holes 37. The end of the locking screw away from the base 1 is located in the through hole 36. The locking cap 1002 is located in the countersunk hole 37 and threadedly connected to the locking screw. The locking cap 1002 has a cross groove to facilitate the use of tools to rotate the locking cap 1002 and tighten it to the locking screw, thereby abutting the end cap 6 against the top of the sealing cover 401 and the integrated inner liner 2. The tops of the sealing cover 401 and the integrated inner liner 2 are located in the fifth sealing groove 34 and the fourth sealing groove 33, respectively, and abut against the fourth sealing ring. The bottom end of the sealing cover 401 is located in the fifth sealing groove 34 and the fourth sealing groove 33, respectively. The buffer chamber 9 is sealed within the third sealing groove 32 and abuts against the third sealing ring. The bottom end of the integrated inner liner 2 abuts against the base 1 via the snap-fit ​​boss 201, and the lower mounting seat 205 of the integrated inner liner 2 abuts against the second sealing ring. Thus, under the sealing action of the second sealing ring, the third sealing ring, and the two sets of fourth sealing rings, the buffer chamber 9 can be sealed. There is a buffer chamber 9 between the sealing cover 401 and the integrated inner liner 2. After hot water is added to the integrated inner liner 2, the integrated inner liner 2 can be separated from the sealing cover 401, thereby preventing the temperature of the hot water from being directly transferred to the sealing cover 401, thus achieving heat insulation and preventing burns to the operator when holding the entire cup assembly. With the buffer chamber 9, if any one of the second, third, or fourth sealing rings fails due to aging or improper installation, or if there is a slight leak, water mist will form in the buffer chamber 9, thus reminding for timely maintenance.

[0037] Further, see Figure 2 , 5 7. At the water inlet 12, there are two sets of connecting blocks 38 with increasing thickness. The thickness of the two sets of connecting blocks 38 increases in opposite directions. The sealing component 14 includes a sealing disc 1401 and two sets of sealing blocks 1402 set on the sealing plate. The sealing disc 1401 is provided with a sealing handle 1403. The thickness of the two sets of sealing blocks 1402 increases. The sealing disc 1401 rotates under the action of external force so that the sealing blocks 1402 and the connecting blocks 38 are engaged to fix the relative position of the sealing disc 1401 and the end cover 6. At the installation port 13, there is an installation bottom cover 39 and an installation top cover 40 that can be detachably connected to the installation bottom cover 39. A fifth sealing ring 41 is provided between the installation top cover 40 and the end cover 6. The installation top cover 40 is provided with a connecting channel 42. The air pressure pipe 15 and the pressure gauge 16 are detachably connected to the connecting channel 42.

[0038] Preferably, the connecting block 38 and the sealing block 1402 are both wedge-shaped blocks, and the sealing plate 1401 is provided with a sixth sealing ring 49.

[0039] Preferably, the outer diameter of the mounting bottom cover 39 and the mounting top cover 40 is larger than the inner diameter of the mounting opening 13. The mounting bottom cover 39 is provided with a connecting pipe 43, and the inner and outer walls of the connecting pipe 43 are both provided with threads. The mounting top cover 40 is provided with a threaded channel that is threadedly connected to the outer wall of the connecting pipe 43.

[0040] Preferably, the mounting top cover 40 is provided with a sixth sealing groove 44, and a fifth sealing ring 41 is installed in the sixth sealing groove 44. The fifth sealing ring 41 extends beyond the sixth sealing groove 44 and abuts against the top of the end cover 6.

[0041] Preferably, the air pressure pipe 15 and the pressure gauge 16 adopt the existing integrated structure. The air pressure pipe 15 can be connected to a quick-release female connector to a three-way integrated body. This integrated body can be connected to a check valve male connector, an exhaust pressure regulating valve, and is threaded to the inner wall of the connecting pipe 43, and is sealed with a seventh sealing ring.

[0042] Further, see Figure 1 , 2 6, 8, The flow guide 17 includes a flow guide column 1701 disposed inside the integrated inner liner 2; the flow slowing component 18 includes a sealing column 1801 disposed at the bottom end of the integrated inner liner 2, the flow guide column 1701 and the sealing column 1801 are detachably connected, the flow guide channel 19 is located inside the flow guide column 1701, the bottom end of the integrated inner liner 2 is provided with an installation channel 46, and the inner wall of the installation channel 46 is provided with multiple sets of flow slowing grooves 45.

[0043] Preferably, the two sides of the installation channel 46 are respectively provided with a first groove 47 located in the guide groove and a second groove 48 located at the bottom of the integrated inner liner 2. The second groove 48 is provided with a seventh sealing ring 50.

[0044] Preferably, the guide column 1701 is provided with an upper limit plate 1702, the interior of the guide column 1701 is hollow to form a guide channel 19, and the outer wall of the end cap column 1801 is provided with multiple sets of guide holes 1803 at intervals along the circumference.

[0045] Preferably, the end cap 1801 is provided with a lower limit plate 1802, the end cap 1801 and the guide column 1701 are connected by threads, and the upper limit plate 1702 is provided with a "I" groove to facilitate rotation with a screwdriver.

[0046] In the above configuration, the locking cap 1002 is connected to the locking screw, thereby covering the end cap 6 onto the top of the sealing cover 401 and the integrated inner liner 2, thus connecting the integrated inner liner 2, the sealing cover 401, and the base 1. The buffer cavity 9 is sealed by the combined action of the second, third, and fourth sealing rings. Both the sealing cover 401 and the integrated inner liner 2 are made of transparent material, allowing observation of the water level inside the holding cavity 202. Alternatively, corresponding water level markings can be provided on the sealing cover 401 and the integrated inner liner 2 for easy identification of the water level inside the holding cavity 202. The pressure gauge 16 and air pressure pipe 15 are installed on the end cover 6 to control the amount of water. The air pressure pipe 15 can be quickly connected to an external air source through a quick connector to pressurize the inside of the container 202. The pressure intensity can be observed and controlled through the pressure gauge 16. The sealing plate 1401 is connected to the connecting block 38 through the sealing block 1402. When the sealing handle 1403 on the sealing plate 1401 is rotated, the sealing plate 1401 can be rotated, thereby controlling the locking of the sealing block 1402 and the connecting block 38 so that the sealing plate 1401 is closed with the end cover 6 or the sealing block 1402 and the connecting block 38 are separated so that the sealing plate 1401 is separated from the end cover 6.

[0047] In this embodiment, when brewing coffee, the ground coffee powder is placed in the coffee bowl 2801, and the coffee bowl 2801 is rotated to connect with the base 1 by the locking block 29 on the support bowl 28 and the snap-fit ​​block 23. The coffee bowl 2801 is located at the bottom of the integrated inner liner 2. The guide column 1701 and the sealing column 1801 are located above the center of the coffee bowl 2801. Holding the sealing cover 401, the external air source is connected to the air pressure pipe 15 through the quick connector. The sealing handle 1403 is rotated to separate the sealing plate 1401 from the water inlet 12. Hot water boiled to 95°C is poured into the integrated inner liner 2 from the water inlet 12. Through the transparent sealing cover 401 and the integrated inner liner 2, it is easy to observe the amount of water added and control the amount added. The sealing plate 1401 is installed on the end cap 6 to pour the water... The inlet 12 is sealed to prevent hot water from escaping and coming into contact with the surface of the end cap 6, causing contamination or heat loss. There is a gap between the sealing cover 401 and the integrated inner tank 2. The sealing cover 401 can insulate heat and pressurize the integrated inner tank 2 by injecting air through an external air source. The pressure intensity is controlled by the pressure gauge 16. The pressurized hot water flows from the guide channel 19 and the guide hole 1803 into the slow flow channel 20. The slow flow channel 20 and the water distribution net 3 evenly distribute the hot water and then it flows out from the slow flow groove 45 into the coffee bowl 2801, quickly impacting the coffee powder in the coffee bowl 2801, thereby extracting the flavor substances of the coffee powder. A coffee cup is placed below the coffee bowl 2801 to receive the extracted coffee. Because the whole structure is more compact, occupies less space, and is easy to move, it is suitable for coffee cups of different heights to hold coffee.

[0048] This design significantly improves operational efficiency. The end cap's water inlet employs a specific quick-lock structure, which, while meeting the requirements of a universal container size for water filling, achieves reliable locking and sealing with a rotation of no more than 90 degrees. This design simplifies the traditional multi-turn screw cap operation to a short-stroke operation of less than half a turn. During water filling, preheating, and cleaning, there is no need to repeatedly disassemble and reassemble the entire cap, significantly reducing operational steps and time.

[0049] By optimizing the balance between operating force and sealing force, and employing an inlet with a significantly smaller diameter than the pressure tank cap, combined with the aforementioned quick-lock structure, this design, based on the fluid pressure principle (F=P×S), significantly reduces the total pressure required for sealing under the same internal pressure. This allows the quick-lock structure to achieve the same sealing effect with a much lower operating force than traditional large-diameter caps, improving ease of operation while ensuring sealing reliability.

[0050] The continuity of the professional process has been specifically improved. The synergistic effect of the above features ensures a smooth user experience when the device is used in a fixed position on the stand. Users can quickly add water and seal the device without disassembling the entire cap, and then pressurize via an independent quick-connect interface to seamlessly execute the "rinse and preheat the water distribution screen" and "lock the powder bowl for extraction" series of operations. This design solves the problem of inefficiency caused by operational interruptions when portable devices mimic professional processes.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coffee extraction device, characterized in that, include: The cup assembly includes a base (1) and an integrated inner liner (2) detachably connected to the base (1); a water distribution mesh (3) is detachably provided inside the base (1), and a closure (4) is movably provided on the base (1) and fitted onto the outside of the integrated inner liner (2); a first sealing element (5) is provided inside the base (1) and abuts against the water distribution mesh (3); an end cap (6) is detachably provided on the integrated inner liner (2), and a second sealing element (7) is provided between the integrated inner liner (2) and the base (1); a third sealing element (8) is provided between the closure element (4) and the base (1); both the closure element (4) and the integrated inner liner (2) are made of transparent material, and the closure element (4) is detachably connected to the base (1). 4) A buffer cavity (9) is formed between the end cap (6) and the integrated inner liner (2); the end cap (6) is respectively snapped into the integrated inner liner (2) and the sealing member (4); a locking member (10) is provided between the end cap (6) and the base (1) to stably connect the integrated inner liner (2), the sealing member (4) and the base (1); a fourth sealing member (11) is provided between the end cap (6) and the integrated inner liner (2) and the sealing member (4); a water inlet (12) and an installation port (13) are provided on the end cap (6); a sealing member (14) is detachably provided on the water inlet (12); a pressure pipe (15) and a pressure gauge (16) are provided on the installation port (13). The flow-slowing component includes a flow guide (17) disposed in an integrated inner liner (2) and a flow-slowing component (18) disposed on the flow guide (17); the flow guide (17) has a flow channel (19) inside; the flow-slowing component (18) has multiple sets of flow-slowing channels (20) connected to the flow channel (19) along the circumferential direction.

2. The coffee extraction apparatus according to claim 1, characterized in that: The base (1) has a snap-fit ​​cavity (21) and a first sealing groove (22) communicating with the snap-fit ​​cavity (21); the inner diameter of the snap-fit ​​cavity (21) is larger than the inner diameter of the first sealing groove (22), the snap-fit ​​cavity (21) and the first sealing groove (22) are coaxially arranged, and multiple sets of snap-fit ​​blocks (23) with increasing thickness are spaced apart on the inner wall of the snap-fit ​​cavity (21); the base (1) has an installation cavity (24) connected to the first sealing groove (22), and the end of the base (1) away from the installation cavity (24) is opened to form a placement opening (25); the inner diameter of the installation cavity (24) is smaller than the inner diameter of the first sealing groove (22).

3. The coffee extraction apparatus according to claim 2, characterized in that: The first sealing element (5) includes a first sealing ring installed in the first sealing groove (22); the snap-fit ​​cavity (21) is provided with a detachable sleeved support bowl (28), the support bowl (28) is provided with a locking block (29) with increasing thickness that cooperates with the snap-fit ​​block (23), the support bowl (28) is provided with a powder bowl (2801), the support bowl (28) rotates under the action of external force so that the locking block (29) abuts against the snap-fit ​​block (23), and then the powder bowl (2801) abuts against the first sealing ring.

4. The coffee extraction apparatus according to claim 3, characterized in that: The outer wall of the integrated inner liner (2) is provided with a snap-fit ​​boss (201) and the interior is provided with a holding cavity (202); the bottom of the interior of the integrated inner liner (2) is provided with an arc-shaped guide groove (203); the inner wall of the mounting cavity (24) is provided with a second sealing groove (31); the second sealing element (7) includes a second sealing ring installed in the second sealing groove (31); the bottom of the integrated inner liner (2) is located in the mounting cavity (24) and abuts against the second sealing ring; the snap-fit ​​boss (201) is located on the base (1).

5. The coffee extraction apparatus according to claim 4, characterized in that: The sealing component (4) includes a sealing cover (401) disposed on the base (1); there is a gap between the sealing cover (401) and the integrated inner liner (2) to form a buffer cavity (9); a third sealing groove (32) coaxial with the mounting cavity (24) is provided on the top of the base (1); the third sealing component (8) includes a third sealing ring installed in the third sealing groove (32).

6. The coffee extraction apparatus according to claim 5, characterized in that: The bottom end of the end cap (6) is provided with a fourth sealing groove (33) and a fifth sealing groove (34) with different inner diameters, respectively; the fourth sealing element (11) includes a fourth sealing ring located in the fourth sealing groove (33) and the fifth sealing groove (34) respectively; the end of the integrated inner liner (2) and the sealing cover (401) away from the base (1) is located in the fourth sealing groove (33) and the fifth sealing groove (34) respectively.

7. A coffee extraction apparatus according to claim 6, characterized in that: The locking component (10) includes a locking rod (1001) disposed on the base (1) and a locking cap (1002) located on the end cover (6); the locking rod (1001) passes through the end cover (6) and is connected to the locking cap (1002) to abut the end cover (6) against the top of the closed cover (401) and the integrated inner liner (2).

8. A coffee extraction apparatus according to claim 7, characterized in that: The water inlet (12) is provided with two sets of connecting blocks (38) with increasing thickness, and the thickness of the two sets of connecting blocks (38) increases in opposite directions; the sealing component (14) includes a sealing disc (1401) and two sets of sealing blocks (1402) provided on the sealing plate; the sealing disc (1401) is provided with a sealing handle (1403), and the thickness of the two sets of sealing blocks (1402) increases; the sealing disc (1401) rotates under the action of external force to make the sealing blocks (1402) rotate. The sealing plate (1401) and the end cap (6) are fixed by the connecting block (38); the mounting port (13) is provided with a mounting bottom cover (39) and a mounting top cover (40) that can be detachably connected to the mounting bottom cover (39); a fifth sealing ring (41) is provided between the mounting top cover (40) and the end cap (6), and a connecting channel (42) is provided on the mounting top cover (40); the air pressure pipe (15) and the pressure gauge (16) are detachably connected to the connecting channel (42).

9. A coffee extraction apparatus according to claim 8, characterized in that: The flow guide (17) includes a flow guide column (1701) disposed in the integrated inner liner (2); the flow slowing component (18) includes a sealing column (1801) disposed at the bottom end of the integrated inner liner (2); the flow guide column (1701) and the sealing column (1801) are detachably connected; the flow guide channel (19) is located inside the flow guide column (1701); the bottom end of the integrated inner liner (2) is provided with an installation channel (46), and the inner wall of the installation channel (46) is provided with multiple sets of flow slowing grooves (45).

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