Coffee machine

Abstract

The utility model relates to the technical field of coffee brewing, in particular to a coffee machine which comprises a base, a rotating shaft, a supporting frame and a coffee brewing device, the coffee brewing device comprises a liquid containing barrel, a filter barrel, a barrel cover, a heating unit, a sleeve, a spray head, a shell, a rotating driver, a liquid outlet nozzle and a liquid outlet control module, and the rotating shaft comprises a screw rod and a shaft rod. A spiral channel is defined by the screw and the sleeve, a liquid passing cavity is defined by the screw, the spray head and the sleeve, the spray head is communicated with the spiral channel through the liquid passing cavity, the sleeve is provided with a liquid supply hole, the liquid supply hole is communicated with the bottom end of the spiral channel, the shaft rod is provided with a liquid outlet channel and a liquid guide hole, and the bottom end of the spiral channel is communicated with the top end of the liquid outlet channel through the liquid guide hole. According to the coffee machine, the rotating shaft is driven to rotate, circulating brewing and mixing in a spiral feeding mode are achieved, the spray head and the filter barrel can be driven to rotate, a mixed solution in the filter barrel is thrown back into the liquid containing barrel under the action of centrifugal force, and therefore coffee powder and liquid can be brewed and mixed more evenly.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee brewing, in particular to a coffee machine. Background Art

[0002] As a drink with a refreshing effect, coffee is becoming more and more popular among people, and coffee machines that can assist in brewing coffee are also gradually becoming widely used.

[0003] Among existing patents, Chinese patent application number 201210224001.5 discloses a coffee machine stirring device and coffee machine, comprising a funnel and a filter assembly disposed within the funnel. The filter assembly comprises a hopper cover and a cylindrical filter, which passes through and is movably connected to a stirring shuttle disposed within the funnel. A drive wheel assembly is provided on a funnel seat located outside the bottom of the funnel, with the end face of the drive wheel assembly coaxially aligned with the stirring shuttle within the funnel. This patent document utilizes a magnetic drive to rotate the stirring shuttle, generating a strong rotational force that stirs the coffee grounds and evenly mixes them with water during brewing. However, the brewing and mixing speed is slow, resulting in low coffee brewing efficiency.

[0004] Furthermore, Chinese patent application number 201710688831.6 discloses a portable coffee machine capable of cyclic brewing, comprising a bottle body, a bracket mounted inside the bottle body, a water trough at the upper end of the bracket, and a puncture tube at the lower end of the bracket. The top of the bottle body is connected to a bottle cap, a water pump is mounted at the lower end of the bottle cap, and a water pump gland is mounted on the top of the water pump. The water inlet at the left end of the water pump is connected to a water column via a curved tube, and the lower end of the water column is connected to the water trough and the water outlet. The lower end of the water pump is connected to a water spray pipe via the water pump outlet, and the lower end of the water spray pipe is connected to the bracket. Although this patent document can achieve cyclic brewing and mixing, the brewing and mixing speed is slow, the coffee brewing efficiency is low, and it needs to be used with a disposable K-CUP filled with coffee powder, which increases the cost of brewing coffee. During use, the disposable K-CUP filled with coffee powder needs to be pierced through the puncture tube and the water spray pipe, and the coffee machine needs to be turned upside down before brewing can be performed, which is inconvenient to operate.

[0005] Therefore, the defects are very obvious and a solution is urgently needed. Utility Model Content

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a coffee machine.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The coffee machine comprises a base, a rotating shaft, a support frame mounted on the base, and a coffee brewing device located above the base, the coffee brewing device comprising a liquid filling barrel mounted on the support frame, a filter barrel rotatably arranged in the liquid filling barrel at intervals and used to load coffee powder, a barrel cover covering the top port of the liquid filling barrel and the top port of the filter barrel, a heating unit arranged on the outer bottom wall of the liquid filling barrel, a sleeve arranged in the middle of the inner bottom wall of the liquid filling barrel and penetrating the bottom wall of the filter barrel, a nozzle mounted in the middle of the inner bottom wall of the filter barrel and sealingly rotatably sleeved on the outside of the top end of the sleeve, a shell mounted on the support frame and located below the liquid filling barrel, a rotation driver built into the shell, a liquid outlet nozzle penetrating the bottom wall of the shell, and a liquid outlet control device arranged on the shell. The module, the filter barrel and the barrel cover are detachably connected in rotation, the rotating shaft includes a coaxially connected screw and a shaft, the screw passes through the inner hole of the sleeve and is fixedly connected to the nozzle, the spiral groove of the screw and the inner wall of the sleeve are arranged to form a spiral channel, the top of the screw, the inner wall of the nozzle and the sleeve are arranged to form a liquid cavity, the nozzle is connected with the top of the spiral channel via the liquid cavity, the bottom side wall of the sleeve is provided with a liquid supply hole, the liquid supply hole is connected with the bottom end of the spiral channel, the shaft is provided with a liquid outlet channel in the axial direction, and a liquid guide hole is provided in the radial direction of the shaft, the bottom end of the spiral channel is connected with the top end of the liquid outlet channel via the liquid guide hole, the rotation driver is used to drive the shaft to rotate, and the liquid outlet control module is used to control the connection and disconnection of the bottom end of the liquid outlet channel and the liquid outlet nozzle.

[0009] Furthermore, the liquid outlet nozzle includes a liquid outlet pipe that slides up and down through the outer shell and an internal limit plate arranged in the inner cavity of the liquid outlet pipe. The internal limit plate divides the inner cavity of the liquid outlet pipe into a sliding hole and a liquid outlet hole. The internal limit plate is provided with a plurality of through holes, which are connected to the liquid outlet hole. The bottom of the shaft rod is slidably inserted into the sliding hole. The liquid outlet control module is used to control the connection and disconnection of the bottom end of the liquid outlet channel and the plurality of through holes.

[0010] The cam is secured to the outer wall of the housing and is adapted to engage the bottom wall of the housing when the cam is in engagement with the outer wall of the housing, the cam being secured to the outer wall of the housing when the cam is in engagement with the bottom wall of the housing.

[0011] Furthermore, a slot is recessed at the bottom end of the housing, and the slot is used to engage with the abutment block; when the abutment block engages with the slot, the spring remains in a compressed state.

[0012] Furthermore, a first sealing ring is sleeved on the outer side wall of the bottom of the shaft rod, and the first sealing ring is used to seal the gap between the outer side wall of the shaft rod and the inner side wall of the sliding hole.

[0013] Furthermore, a non-circular connecting key is convexly provided on the top end of the screw, and a non-circular keyway is concavely provided in the inner cavity of the nozzle to match the non-circular connecting key.

[0014] Furthermore, an embedded cylinder is formed by extending downward from the middle part of the bottom plate of the liquid barrel, and the bottom end of the sleeve is integrally connected with a bearing seat. The bearing seat is tightly embedded in the embedded cylinder, and a sealing ring and a first bearing are embedded in the bearing seat from top to bottom. The shaft rod passes through the inner ring and the sealing ring of the first bearing. The sealing ring is used to seal the gap between the shaft rod and the bearing seat. The shaft rod is rotatably connected to the bearing seat via the first bearing, and the liquid supply hole is located at the connection position between the sleeve and the bearing seat; the shaft rod passes through the bottom wall of the embedded cylinder.

[0015] Furthermore, the outer side wall of the liquid filling barrel is provided with an annular heating temperature knob potentiometer and an annular brewing time knob potentiometer, and the base is provided with a built-in control system. The annular heating temperature knob potentiometer, the annular brewing time knob potentiometer, the heating unit and the rotary driver are all electrically connected to the control system. The annular heating temperature knob potentiometer is used to adjust the heating temperature of the heating unit, and the annular brewing time knob potentiometer is used to adjust the rotation time of the rotary driver.

[0016] Furthermore, two gear positioning assemblies are embedded on the side wall of the liquid barrel, and the two gear positioning assemblies are respectively set to correspond to the annular knob of the annular heating temperature knob potentiometer and the annular knob of the annular brewing time knob potentiometer. One gear positioning assembly is used to position the annular knob of the annular heating temperature knob potentiometer, and the other gear positioning assembly is used to position the annular knob of the annular brewing time knob potentiometer.

[0017] Furthermore, the barrel cover includes a limiting ring, a cover plate and a cover handle, the cover handle is installed in the middle of the cover plate, the limiting ring is installed on the top of the liquid barrel, the limiting ring and the top surface of the liquid barrel are arranged to form a rotating groove, the limiting ring is provided with a plurality of clearance holes, and the plurality of clearance holes are all connected to the rotating groove, the edge of the cover plate is provided with a plurality of limiting plates, a limiting plate is moved into the rotating groove through a clearance hole, and the limiting plate can rotate along the rotating groove.

[0018] The beneficial effects of the present invention are as follows: in actual application, under normal circumstances, the liquid discharge control module blocks the bottom end of the liquid discharge channel, and the liquid discharge channel is not connected to the liquid discharge nozzle; when it is necessary to brew coffee, the barrel cover is opened, and a certain amount of liquid (such as water, etc.) and coffee powder are added to the liquid filling barrel and the filter barrel respectively, and the heating unit heats the liquid in the liquid filling barrel, and then the barrel cover is closed to close the liquid filling barrel and the filter barrel, and then the driver drives the shaft to rotate at high speed, so that the rotating shaft rotates at high speed, and the high-speed rotating shaft drives the nozzle and the filter barrel to rotate at high speed, and as the screw rotates at high speed, the liquid in the liquid filling barrel will enter the spiral channel from the liquid supply hole, and the liquid will be spirally transported upward along the spiral channel to the liquid cavity, and the liquid in the liquid cavity will be sprayed into the filter barrel through the nozzle, so that the liquid is mixed with the coffee powder to brew the coffee. The coffee powder is brewed to form a mixed solution. At the same time, as the filter barrel rotates at high speed, the mixed solution is thrown back into the liquid barrel through the filter holes of the filter barrel under the action of centrifugal force / rotational force, so that the mixed solution in the liquid barrel can circulate and brew coffee, making the mixture of liquid and coffee powder more uniform, which is conducive to improving the taste of the coffee beverage. When the brewing time of the coffee brewing device reaches a preset value, the rotary driver stops driving the rotating shaft, and the cup is placed on the base, and the cup is located below the liquid outlet nozzle. At this time, the liquid outlet control module opens the bottom end of the liquid outlet channel, so that the bottom end of the liquid outlet channel is connected to the liquid outlet nozzle. The coffee beverage in the liquid barrel will enter the liquid outlet channel through the liquid guide hole. The liquid outlet channel transports the coffee beverage to the liquid outlet nozzle, and the liquid outlet nozzle outputs the coffee beverage into the cup. When liquid and / or coffee powder need to be added, the barrel lid can be opened to add liquid and coffee powder to the liquid barrel and filter barrel respectively, which is convenient for adding liquid and coffee powder. In addition, when cleaning is required, after opening the barrel cover, the filter barrel can be removed from the rotating shaft, and the filter barrel and the liquid barrel can be cleaned. Cleaning and maintenance are convenient, and it is not easy to cause clogging of the filter holes and the nozzle of the filter barrel. In particular, when the mixed solution is transported upward along the spiral channel, the mixed solution will also be made more uniform. By driving the rotating shaft to rotate, the utility model not only realizes the cyclic brewing and mixing by spiral feeding, but also drives the nozzle and the filter barrel to rotate, so that the mixed solution in the filter barrel is thrown back into the liquid barrel under the action of centrifugal force / rotational force, thereby making the brewing and mixing of coffee powder and liquid more uniform, and thus making the coffee beverage taste better, and the addition of liquid and coffee powder is convenient and efficient, and the filter barrel and the liquid barrel are easy to clean and maintain; in addition, the strength of the cyclic brewing coffee can be controlled by controlling the rotation time of the rotating shaft, so that coffee that suits personal taste can be brewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the present utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model in a normal state.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model when it is in the state of dispensing coffee beverage.

[0022] Figure 4 This is a cross-sectional view of the utility model after the base, support frame, housing, rotary driver, annular heating temperature knob potentiometer and annular brewing time knob potentiometer are hidden.

[0023] Figure 5 This is a schematic diagram of the exploded structure of the utility model after the base and support frame are hidden.

[0024] Description of reference numerals:

[0025] 1. Base; 2. Rotating shaft; 3. Support frame; 4. Liquid barrel; 5. Filter barrel; 6. Barrel cover; 7. Heating unit; 8. Sleeve; 9. Nozzle; 10. Housing; 11. Rotating driver; 12. Liquid outlet nozzle; 13. Liquid outlet control module; 14. Screw; 15. Shaft; 16. Spiral channel; 17. Liquid passage; 18. Liquid supply hole; 19. Liquid outlet channel; 20. Liquid guide hole; 21. Liquid outlet pipe; 22. Inner limit plate; 23. Sliding hole; 24. Liquid outlet hole; 25. Through hole; 26. Outer limit plate; 27. Contact plate; 28. Spring; 29. ​​Sealing gasket; 3 0. Control wrench; 31. Through hole; 32. Interference block; 33. Card slot; 34. First sealing ring; 35. Non-circular connecting key; 36. Embedded cylinder; 37. Bearing seat; 38. Sealing ring; 39. First bearing; 40. Annular heating temperature knob potentiometer; 41. Annular brewing time knob potentiometer; 42. Gear positioning assembly; 43. Second sealing ring; 46. Limiting ring; 47. Cover plate; 48. Cover handle; 49. Rotating slot; 50. Clearance hole; 51. Limiting piece; 52. Second bearing; 55. Clamp; 56. Conical surface; 57. Spray hole; 58. Baffle. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0027] like Figures 1 to 5The coffee maker of the present invention comprises a base 1, a rotating shaft 2, a support frame 3 mounted on the base 1 and a coffee brewing device located above the base 1, the coffee brewing device comprising a liquid filling barrel 4 mounted on the support frame 3, a filter barrel 5 rotatably arranged in the liquid filling barrel 4 and used to load coffee powder, a barrel cover 6 covering the top port of the liquid filling barrel 4 and the top port of the filter barrel 5, a heating unit 7 arranged on the outer bottom wall of the liquid filling barrel 4, a sleeve 8 arranged in the middle of the inner bottom wall of the liquid filling barrel 4 and penetrating the bottom wall of the filter barrel 5, a nozzle 9 mounted in the middle of the inner bottom wall of the filter barrel 5 and sealingly rotatably sleeved on the top outside of the sleeve 8, a shell 10 mounted on the support frame 3 and located below the liquid filling barrel 4, a rotation driver 11 built into the shell 10, a liquid outlet nozzle 12 penetrating the bottom wall of the shell 10 and a liquid outlet control module 13 arranged on the shell 10, the filter barrel 5 and the barrel cover 6 are detachably connected to each other, the rotating shaft 2 The invention comprises a coaxially connected screw 14 and a shaft 15, wherein the screw 14 passes through the inner hole of the sleeve 8 and is fixedly connected to the nozzle 9, and the spiral groove of the screw 14 and the inner wall of the sleeve 8 are surrounded by a spiral channel 16, and a liquid cavity 17 is formed between the top of the screw 14, the inner wall of the nozzle 9 and the sleeve 8, and the nozzle 9 is connected to the top of the spiral channel 16 via the liquid cavity 17, and a liquid supply hole 18 is opened on the side wall of the bottom end of the sleeve 8, and the liquid supply hole 18 is connected to the bottom end of the spiral channel 16. The shaft 15 is connected, and a liquid outlet channel 19 is provided in the axial direction of the shaft 15, and a liquid guide hole 20 is provided in the radial direction of the shaft 15. The bottom end of the spiral channel 16 is connected with the top end of the liquid outlet channel 19 via the liquid guide hole 20. The rotation driver 11 is used to drive the shaft 15 to rotate, and the liquid outlet control module 13 is used to control the connection and disconnection between the bottom end of the liquid outlet channel 19 and the liquid outlet nozzle 12; specifically, the rotation driver 11 can adopt a motor, and the nozzle 9 and the filter barrel 5 can rotate relative to the sleeve 8.

[0028] In actual application, under normal circumstances, the liquid discharge control module 13 blocks the bottom end of the liquid discharge channel 19, and the liquid discharge channel 19 is not connected to the liquid discharge nozzle 12; when it is necessary to brew coffee, the barrel cover 6 is opened, and a certain amount of liquid (such as water, etc.) and coffee powder are added to the liquid filling barrel 4 and the filter barrel 5 respectively, and the heating unit 7 heats the liquid in the liquid filling barrel 4, and then the barrel cover 6 covers the liquid filling barrel 4 and the filter barrel 5, and then the rotating driver 11 drives the shaft 15 to rotate at a high speed, so that the rotating shaft 2 rotates at a high speed, and the high-speed rotating rotating shaft 2 drives the nozzle 9 and the filter barrel 5 to rotate at a high speed. As the screw 14 rotates at a high speed, the liquid in the liquid filling barrel 4 will enter the spiral channel 16 from the liquid supply hole 18, and the liquid will be spirally transported upward along the spiral channel 16 to the liquid passage 17. The liquid in the liquid passage 17 is sprayed into the filter barrel 5 through the nozzle 9, so that the liquid is mixed with the coffee powder to brew the coffee. The coffee powder is brewed to form a mixed solution. At the same time, as the filter barrel 5 rotates at a high speed, the mixed solution will be thrown back into the liquid filling barrel 4 through the filter holes of the filter barrel 5 under the action of centrifugal force / rotational force, so that the mixed solution in the liquid filling barrel 4 can circulate and brew coffee, making the mixing of liquid and coffee powder more uniform, which is beneficial to improving the taste of the coffee beverage; when the brewing time of the coffee brewing device reaches a preset value, the rotation driver 11 stops driving the rotating shaft 2, and the cup is placed on the base 1, and the cup is located below the liquid outlet nozzle 12. At this time, the liquid outlet control module 13 opens the bottom end of the liquid outlet channel 19, so that the bottom end of the liquid outlet channel 19 is connected to the liquid outlet nozzle 12, and the coffee beverage in the liquid filling barrel 4 enters the liquid outlet channel 19 through the liquid guide hole 20, and the liquid outlet channel 19 transports the coffee beverage to the liquid outlet nozzle 12, and the liquid outlet nozzle 12 outputs the coffee beverage into the cup. When liquid and / or coffee powder needs to be added, the lid 6 can be opened to add liquid and coffee powder to the liquid storage barrel 4 and filter barrel 5, respectively, making the addition of liquid and coffee powder convenient. Furthermore, when cleaning is required, the lid 6 can be opened and the filter barrel 5 removed from the rotating shaft 2 to clean the filter barrel 5 and the liquid storage barrel 4. This facilitates cleaning and maintenance and reduces the risk of clogging the filter holes of the filter barrel 5 and the nozzle 9. Furthermore, as the mixed solution is spirally transported upward along the spiral channel 16, the mixed solution becomes more uniform. The utility model drives the rotating shaft 2 to rotate, not only realizing cyclic brewing and mixing in a spiral feeding manner, but also driving the nozzle 9 and the filter barrel 5 to rotate, so that the mixed solution in the filter barrel 5 is thrown back into the liquid filling barrel 4 under the action of centrifugal force / rotational force, thereby making the brewing and mixing of coffee powder and liquid more uniform, thereby making the coffee beverage taste better, and the addition of liquid and coffee powder is convenient and efficient, and the cleaning and maintenance of the filter barrel 5 and the liquid filling barrel 4 are convenient; in addition, the strength of the cyclic brewing coffee can be controlled by controlling the rotation time of the rotating shaft 2, so that coffee suitable for personal taste can be brewed.

[0029] In this embodiment, the liquid outlet nozzle 12 includes a liquid outlet pipe 21 that slides up and down through the outer shell 10 and an inner limit plate 22 arranged in the inner cavity of the liquid outlet pipe 21. The inner limit plate 22 divides the inner cavity of the liquid outlet pipe 21 into a sliding hole 23 and a liquid outlet hole 24. The inner limit plate 22 is provided with a plurality of through holes 25, which are connected to the liquid outlet hole 24. The bottom of the shaft 15 is slidably inserted into the sliding hole 23. The liquid outlet control module 13 is used to control the connection and disconnection between the bottom end of the liquid outlet channel 19 and the plurality of through holes 25. Specifically, the liquid outlet nozzle 12 also includes an outer limit plate 26 arranged on the outer side wall of the liquid outlet pipe 21 and located in the shell 10. A resistance plate 27 is provided in the shell 10 and is located above the outer limit plate 26. The liquid outlet control module 13 includes a spring 28, a sealing gasket 29 and a control wrench 30. The spring 28 is sleeved on the outside of the liquid outlet pipe 21. The two ends of the spring 28 respectively resist the lower side of the outer limit plate 26 and the inner bottom wall of the shell 10. The sealing gasket 29 is installed on the top surface of the inner limit plate 22. The sealing gasket 29 is provided with a plurality of through holes 31. The plurality of through holes 31 are respectively connected to the plurality of through holes 25 in a one-to-one correspondence. The wrench 30 is rotatably connected to the liquid outlet pipe 21 and is located below the outer shell 10. The inner end of the control wrench 30 is protruded upward with a resistance block 32 for resisting the bottom end of the outer shell 10. The outer end of the control wrench 30 extends upward at an angle, and the overall structure of the control wrench 30 is roughly √-shaped; when the spring 28 is in an extended state, the outer limit plate 26 resists the resistance plate 27, the bottom end surface of the liquid outlet pipe 21 is tightly against the sealing gasket 29 and blocks several through holes 31; when the spring 28 is in a compressed state, the outer limit plate 26 separates from the resistance plate 27, the bottom end surface of the liquid outlet pipe 21 separates from the sealing gasket 29 and opens several through holes 31.

[0030] In actual application, at the beginning, the spring 28 is in an extended state, the liquid outlet nozzle 12 is in a high position, the outer limit plate 26 contacts the contact plate 27, the bottom end surface of the shaft rod 15 is tightly fitted with the sealing gasket 29, and the bottom end surface of the shaft rod 15 blocks the multiple through holes 31 on the sealing gasket 29. At this time, the solution in the liquid outlet channel 19 cannot flow out; when it is necessary to discharge a coffee beverage, downward pressure is applied to the outer end of the control wrench 30 to rotate the control wrench 30, and the contact block 32 on the rotating control wrench 30 will contact the outer At the bottom end of the housing 10, the housing 10 applies a reaction force to the abutment block 32, allowing the control lever 30 to move the liquid outlet pipe 21 downward. The downwardly moving outer stop plate 26 of the liquid outlet pipe 21 compresses the spring 28, and the bottom end surface of the shaft 15 separates from the sealing gasket 29 on the inner stop plate 22, allowing the liquid outlet channel 19 to communicate with the through hole 25 via the through hole 31. The coffee beverage flows through the liquid outlet channel 19, the through hole 31, and the through hole 25 into the liquid outlet hole 24, allowing the liquid outlet pipe 21 to dispense the coffee beverage. When it is necessary to stop dispensing the coffee beverage, the downward pressure on the outer end of the control lever 30 is released, causing the liquid outlet pipe 21 to move upward and return to its original position under the rebound force of the spring 28 until the bottom end surface of the shaft 15 abuts the sealing gasket 29 and blocks the through hole 31. At the same time, the control lever 30 automatically returns to its original position.

[0031] In this embodiment, the bottom end of the housing 10 is recessed with a slot 33 for engaging with a stopper 32. When the stopper 32 engages the slot 33, the spring 28 remains compressed. To maintain the dispensing of coffee while freeing the user's hands, when pressing down on the outer end of the control lever 30, the stopper 32 needs to be moved to the slot 33. Only after the stopper 32 engages the slot 33 can the control lever 30 be released. At this point, due to the engagement between the stopper 32 and the slot 33, the spring 28 remains compressed, and the control lever 30 cannot automatically reset. As a result, the liquid dispensing tube 21 remains in a lowered position, and the bottom end surface of the shaft 15 remains separated from the sealing gasket 29 on the inner limit plate 22, allowing for continuous dispensing of coffee. When it is necessary to stop dispensing coffee beverages, the control wrench 30 is operated to move the resistance block 32 out of the slot 33. Under the rebound force of the spring 28, the liquid outlet pipe 21 moves upward and resets, and the control wrench 30 resets until the bottom end surface of the shaft 15 blocks the through hole 31. Then, the liquid outlet pipe 21 and the control wrench 30 are reset to their initial state.

[0032] In this embodiment, a first sealing ring 34 is mounted on the outer sidewall of the bottom of the shaft 15. The first sealing ring 34 is used to seal the gap between the outer sidewall of the shaft 15 and the inner sidewall of the sliding hole 23. This structural design improves the sealing between the shaft 15 and the liquid outlet pipe 21, preventing leakage.

[0033] In this embodiment, a non-circular connecting key 35 is provided at the top end of the screw 14, and a non-circular keyway is provided within the inner cavity of the nozzle 9, which is recessed and mates with the non-circular connecting key 35. The convex-concave fit between the non-circular connecting key 35 and the non-circular keyway not only facilitates the positioning and assembly of the nozzle 9 and the rotating shaft 2, but also ensures high positional accuracy and stability after assembly, and ensures that the nozzle 9 and the rotating shaft 2 rotate synchronously.

[0034] Specifically, a second sealing ring 43 is embedded in the inner cavity of the nozzle head 9, which is used to seal the gap between the inner wall of the nozzle head 9 and the outer wall of the sleeve 8. This structural design improves the sealing between the nozzle head 9 and the sleeve 8, preventing the solution in the liquid cavity 17 from flowing back into the liquid storage barrel 4 through the gap between the inner wall of the nozzle head 9 and the outer wall of the sleeve 8, ensuring that the solution in the liquid cavity 17 is sprayed from the nozzle head 9 into the filter barrel 5, thereby ensuring that the circular brewing and mixing can be completed normally.

[0035] In this embodiment, an embedded cylinder 36 is formed by extending downward from the middle part of the bottom plate of the liquid-filling barrel 4, and a bearing seat 37 is integrally connected to the bottom end of the sleeve 8. The diameter of the bearing seat 37 is larger than the diameter of the sleeve 8. The bearing seat 37 is tightly embedded in the embedded cylinder 36. The top surface of the bearing seat 37 is not higher than the inner bottom wall of the liquid-filling barrel 4. A sealing ring 38 and a first bearing 39 are embedded in the bearing seat 37 from top to bottom. The shaft 15 passes through the inner ring of the first bearing 39 and the sealing ring 38. The sealing ring 38 is used to seal the gap between the shaft 15 and the bearing seat 37. The shaft 15 is rotatably connected to the bearing seat 37 via the first bearing 39. The liquid supply hole 18 is located at the connection position between the sleeve 8 and the bearing seat 37; the shaft 15 passes through the bottom wall of the embedded cylinder 36. This structural design improves the positioning accuracy and stability of the sleeve 8 because the bearing seat 37 is embedded in the embedding tube 36; the setting of the first bearing 39 improves the rotation stability of the rotating shaft 2; the sealing ring 38 seals the gap between the shaft 15 and the bearing seat 37 to prevent liquid leakage.

[0036] In this embodiment, the outer wall of the liquid storage barrel 4 is provided with an annular heating temperature knob potentiometer 40 and an annular brewing time knob potentiometer 41. The base 1 has a built-in control system. The annular heating temperature knob potentiometer 40, the annular brewing time knob potentiometer 41, the heating unit 7, and the rotary driver 11 are all electrically connected to the control system. The annular heating temperature knob potentiometer 40 is used to adjust the heating temperature of the heating unit 7, and the annular brewing time knob potentiometer 41 is used to adjust the rotation time of the rotary driver 11. Specifically, the annular heating temperature knob potentiometer 40 and the annular brewing time knob potentiometer 41 can adopt potentiometers in the prior art and will not be described in detail here.

[0037] In actual application, by manipulating the annular heating temperature knob potentiometer 40 and the annular brewing time knob potentiometer 41, combined with the control of the control system, the temperature at which the heating unit 7 heats the solution in the liquid barrel 4 and the time for the rotary driver 11 to drive the rotating shaft 2 to rotate are controlled to adjust the temperature and time of brewing coffee.

[0038] In this embodiment, two gear positioning components 42 are embedded on the side wall of the liquid barrel 4. The two gear positioning components 42 are respectively set to correspond to the annular knob of the annular heating temperature knob potentiometer 40 and the annular knob of the annular brewing time knob potentiometer 41. One gear positioning component 42 is used to position the annular knob of the annular heating temperature knob potentiometer 40, and the other gear positioning component 42 is used to position the annular knob of the annular brewing time knob potentiometer 41.

[0039] In actual application, the gear positioning component 42 is used to position the rotation positions of the annular knob of the annular heating temperature knob potentiometer 40 and the annular brewing time knob potentiometer 41 to ensure the stability of adjusting the heating temperature and brewing time.

[0040] Specifically, the gear positioning component 42 is a spring 28 bead, the annular knob of the annular heating temperature knob potentiometer 40 is provided with a plurality of temperature positioning grooves in a ring array (not shown in the figure), and the annular knob of the annular brewing time knob potentiometer 41 is provided with a plurality of time positioning grooves in a ring array (not shown in the figure), each temperature positioning groove is provided with a corresponding temperature scale value, and each time positioning groove is provided with a corresponding time scale value; the temperature positioning groove and the time positioning groove are used to engage with the corresponding beads of the spring 28 bead.

[0041] In actual application, every time the annular knob of the annular heating temperature knob potentiometer 40 rotates to the position of a temperature positioning groove or every time the annular knob of the annular brewing time knob potentiometer 41 rotates to the position of a time positioning groove, the bead of the spring 28 will be stuck in the corresponding temperature positioning groove or time positioning groove. On the one hand, the stability and accuracy of adjusting the annular heating temperature knob potentiometer 40 and the annular brewing time knob potentiometer 41 are improved. On the other hand, there is a certain sense of frustration / tactile sensation during adjustment, which is conducive to the user to accurately adjust the temperature and time.

[0042] In this embodiment, the barrel cover 6 includes a limiting ring 46, a cover plate 47 and a cover handle 48. The cover handle 48 is installed in the middle of the cover plate 47. The limiting ring 46 is installed at the top of the liquid barrel 4. The limiting ring 46 and the top surface of the liquid barrel 4 are arranged to form a rotation groove 49. The limiting ring 46 is provided with a plurality of clearance holes 50. The plurality of clearance holes 50 are all connected to the rotation groove 49. The edge of the cover plate 47 is protruding with a plurality of limiting pieces 51. A limiting piece 51 moves into the rotation groove 49 through a clearance hole 50. The limiting piece 51 can rotate along the rotation groove 49.

[0043] In actual application, when the bucket cover 6 opens the liquid filling bucket 4 and the filter bucket 5, the limiting ring 46 will be fixed to the top of the liquid filling bucket 4, and the cover handle 48 together with the cover plate 47 will be separated from the limiting ring 46; when it is necessary to cover the bucket cover 6, the cover handle 48 is held and moved together with the cover plate 47 to the top of the liquid filling bucket 4 and the filter bucket 5, and the multiple limiting pieces 51 on the cover plate 47 respectively correspond to the multiple paving holes 50, and then the cover plate 47 is moved down so that the multiple limiting pieces 51 on the cover plate 47 are respectively corresponding ... The limiting pieces 51 are moved one by one into the plurality of clearance holes 50, and the cover handle 48 is then rotated, causing the cover plate 47 to rotate along the rotation groove 49, thereby causing the plurality of limiting pieces 51 to rotate within the rotation groove 49 until the plurality of limiting pieces 51 rotate to a position misaligned with the plurality of clearance holes 50. The limiting ring 46 can then limit the limiting pieces 51 of the cover plate 47 to the liquid filling barrel 4, so that the cover plate 47 covers the top port of the liquid filling barrel 4 and the top port of the filter barrel 5. When it is necessary to open the cover plate 47, the cover handle 48 is driven in the reverse direction to cause the cover plate 47 to rotate in the opposite direction until the plurality of limiting pieces 51 of the cover plate 47 rotate into the plurality of clearance holes 50. The cover handle 48 can then be pulled upward to pull the cover plate 47 away from the limiting ring 46, thereby opening the cover plate 47. This structural design facilitates the opening and closing of the barrel cover 6, is easy to operate, and provides good closing stability.

[0044] Specifically, the cover handle 48 passes through the cover plate 47, and a second bearing 52 is sleeved on the bottom end of the cover handle 48. The filter barrel 5 is rotatably connected to the cover handle 48 via the second bearing 52. When the cover plate 47 covers the top port of the liquid filling barrel 4 and the top port of the filter barrel 5, the filter barrel 5 is sleeved on the outer ring of the second bearing 52, allowing the filter barrel 5 to rotate relative to the cover handle 48, thereby allowing the filter barrel 5 to rotate synchronously with the spray head 9.

[0045] Specifically, the cover handle 48 is provided with a limit step and a clamping groove 33. The clamping groove 33 is detachably mounted with a clamping hoop 55. The second bearing 52 is sandwiched between the limit step and the clamping hoop 55. This structural design facilitates the assembly and disassembly of the second bearing 52 and improves the position accuracy and working stability of the assembled second bearing 52.

[0046] Specifically, a plurality of filter holes are provided on the side wall and the bottom wall of the filter barrel 5 ; during the high-speed rotation of the filter barrel 5 , the mixed solution or coffee beverage is thrown back into the liquid barrel 4 through the filter holes.

[0047] Specifically, the limiting ring 46 is locked on the liquid barrel 4 via a locking piece, and the locking piece can be a bolt. This structural design facilitates the disassembly and assembly of the limiting ring 46 and the liquid barrel 4, and the assembly is firm.

[0048] Specifically, the top of the nozzle 9 is provided with a conical surface 56, on which a plurality of spray holes 57 are arranged in a circular array. The spray holes 57 are recessed and inclined inward from the conical surface 56. This structural design allows liquid to be sprayed from the center of the nozzle 9 to the surrounding area, which helps to improve the brewing and mixing efficiency of the coffee grounds in the filter barrel 5.

[0049] Specifically, two baffles 58 are provided in parallel on the outer wall of the housing 10 , and the outer end of the control wrench 30 is located between the two baffles 58 ; the two baffles 58 block both sides of the control wrench 30 so that the liquid outlet pipe 21 does not rotate with the shaft 15 .

[0050] Specifically, the heating unit 7 may be a heating plate, which will not be described in detail here.

[0051] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A coffee machine, characterized in that: The invention comprises a base (1), a rotating shaft (2), a support frame (3) mounted on the base (1), and a coffee brewing device located above the base (1), wherein the coffee brewing device comprises a liquid filling barrel (4) mounted on the support frame (3), a filter barrel (5) rotatably arranged in the liquid filling barrel (4) and used for loading coffee powder, a barrel cover (6) covering the top port of the liquid filling barrel (4) and the top port of the filter barrel (5), a heating unit (7) arranged on the outer bottom wall of the liquid filling barrel (4), and a filter barrel (5) arranged on the inner bottom wall of the liquid filling barrel (4). The filter barrel (5) and the barrel cover (6) are provided with a sleeve (8) in the middle of the inner bottom wall and passing through the bottom wall of the filter barrel (5), a nozzle (9) installed in the middle of the inner bottom wall of the filter barrel (5) and sealingly rotatably sleeved on the top of the sleeve (8), a shell (10) installed on the support frame (3) and located below the liquid barrel (4), a rotation driver (11) built into the shell (10), a liquid outlet nozzle (12) passing through the bottom wall of the shell (10), and a liquid outlet control module (13) provided on the shell (10), wherein the filter barrel (5) and the barrel cover (6) are detachably rotatable. The rotating shaft (2) includes a coaxially connected screw (14) and a shaft (15). The screw (14) passes through the inner hole of the sleeve (8) and is fixedly connected to the nozzle (9). The spiral groove of the screw (14) and the inner wall of the sleeve (8) are surrounded to form a spiral channel (16). The top of the screw (14), the inner wall of the nozzle (9) and the sleeve (8) are surrounded to form a liquid cavity (17). The nozzle (9) is connected to the top of the spiral channel (16) via the liquid cavity (17). The bottom side wall of the sleeve (8) is opened. A liquid supply hole (18) is provided, the liquid supply hole (18) is communicated with the bottom end of the spiral channel (16), a liquid outlet channel (19) is provided in the axial direction of the shaft (15), a liquid guide hole (20) is provided in the radial direction of the shaft (15), the bottom end of the spiral channel (16) is communicated with the top end of the liquid outlet channel (19) via the liquid guide hole (20), a rotary driver (11) is used to drive the shaft (15) to rotate, and a liquid outlet control module (13) is used to control the connection and disconnection between the bottom end of the liquid outlet channel (19) and the liquid outlet nozzle (12).

2. The coffee machine according to claim 1, wherein: The liquid outlet nozzle (12) includes a liquid outlet pipe (21) that slides upward and downward through the shell (10) and an inner limit plate (22) arranged in the inner cavity of the liquid outlet pipe (21). The inner limit plate (22) divides the inner cavity of the liquid outlet pipe (21) into a sliding hole (23) and a liquid outlet hole (24). The inner limit plate (22) is provided with a plurality of through holes (25), which are connected to the liquid outlet hole (24). The bottom of the shaft (15) is slidably inserted into the sliding hole (23). The liquid outlet control module (13) is used to control the connection and disconnection between the bottom end of the liquid outlet channel (19) and the plurality of through holes (25).

3. The coffee machine according to claim 2, characterized in that: The liquid outlet nozzle (12) further comprises an outer limiting plate (26) arranged on the outer side wall of the liquid outlet pipe (21) and located in the housing (10); a contact plate (27) located above the outer limiting plate (26) is arranged in the housing (10); the liquid outlet control module (13) comprises a spring (28), a sealing gasket (29) and a control wrench (30); the spring (28) is sleeved outside the liquid outlet pipe (21); the two ends of the spring (28) respectively contact the lower side of the outer limiting plate (26) and the inner bottom wall of the housing (10); the sealing gasket (29) is installed on the top surface of the inner limiting plate (22); the sealing gasket (29) is provided with a plurality of through holes (31); the plurality of through holes (31) are respectively connected to the plurality of through holes (25) The control wrench (30) is connected to the liquid outlet pipe (21) in a one-to-one correspondence and is located below the housing (10). The inner end of the control wrench (30) is provided with a contact block (32) for contacting the bottom end of the housing (10) and is upwardly protruding. The outer end of the control wrench (30) extends upwardly in an inclined manner. When the spring (28) is in an extended state, the outer limit plate (26) contacts the contact plate (27), and the bottom end surface of the liquid outlet pipe (21) is tightly attached to the sealing gasket (29) and blocks a plurality of through holes (31). When the spring (28) is in a compressed state, the outer limit plate (26) separates from the contact plate (27), and the bottom end surface of the liquid outlet pipe (21) separates from the sealing gasket (29) and opens a plurality of through holes (31).

4. The coffee machine according to claim 3, characterized in that: The bottom end of the housing (10) is concavely provided with a card slot (33), and the card slot (33) is used to be engaged with the abutment block (32); when the abutment block (32) is engaged with the card slot (33), the spring (28) remains in a compressed state.

5. The coffee machine according to claim 2, characterized in that: The bottom outer wall of the shaft rod (15) is sleeved with a first sealing ring (34), and the first sealing ring (34) is used to seal the gap between the outer wall of the shaft rod (15) and the inner wall of the sliding hole (23).

6. The coffee machine according to claim 1, characterized in that: A non-circular connecting key (35) is convexly provided on the top end of the screw rod (14), and a non-circular key groove which is concavely matched with the non-circular connecting key (35) is concavely provided in the inner cavity of the nozzle (9).

7. The coffee machine according to claim 1, characterized in that: The middle part of the bottom plate of the liquid-filling barrel (4) extends downward to form an embedded cylinder (36), and the bottom end of the sleeve (8) is integrally connected with a bearing seat (37). The bearing seat (37) is tightly embedded in the embedded cylinder (36). A sealing ring (38) and a first bearing (39) are embedded in the bearing seat (37) from top to bottom. The shaft (15) passes through the inner ring of the first bearing (39) and the sealing ring (38). The sealing ring (38) is used to seal the gap between the shaft (15) and the bearing seat (37). The shaft (15) is rotatably connected to the bearing seat (37) via the first bearing (39). The liquid supply hole (18) is located at the connection position between the sleeve (8) and the bearing seat (37); the shaft (15) passes through the bottom wall of the embedded cylinder (36).

8. The coffee machine according to claim 1, characterized in that: The outer side wall of the liquid storage barrel (4) is provided with an annular heating temperature knob potentiometer (40) and an annular brewing time knob potentiometer (41); the base (1) is provided with a built-in control system; the annular heating temperature knob potentiometer (40), the annular brewing time knob potentiometer (41), the heating unit (7) and the rotation driver (11) are all electrically connected to the control system; the annular heating temperature knob potentiometer (40) is used to adjust the heating temperature of the heating unit (7); and the annular brewing time knob potentiometer (41) is used to adjust the rotation time of the rotation driver (11).

9. The coffee machine according to claim 8, characterized in that: Two gear positioning assemblies (42) are embedded on the side wall of the liquid storage barrel (4), and the two gear positioning assemblies (42) are respectively arranged in a one-to-one correspondence with the annular knob of the annular heating temperature knob potentiometer (40) and the annular knob of the annular brewing time knob potentiometer (41). One gear positioning assembly (42) is used to position the annular knob of the annular heating temperature knob potentiometer (40), and the other gear positioning assembly (42) is used to position the annular knob of the annular brewing time knob potentiometer (41).

10. The coffee machine according to claim 1, characterized in that: The barrel cover (6) comprises a limiting ring (46), a cover plate (47) and a cover handle (48). The cover handle (48) is mounted on the middle of the cover plate (47). The limiting ring (46) is mounted on the top of the liquid barrel (4). The limiting ring (46) and the top surface of the liquid barrel (4) are arranged to form a rotation groove (49). The limiting ring (46) is provided with a plurality of clearance holes (50). The plurality of clearance holes (50) are all communicated with the rotation groove (49). The edge of the cover plate (47) is provided with a plurality of limiting pieces (51). One limiting piece (51) moves into the rotation groove (49) through one of the clearance holes (50). The limiting piece (51) can rotate along the rotation groove (49).

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