Extraction device for coffee machine based on rotating speed regulation and control

Abstract

The invention discloses an extraction device for a coffee machine based on rotation speed regulation and control, and relates to the technical field of coffee machines.The extraction device comprises an outer shell, an automatic extraction assembly, a grinder, an extrusion assembly, a water injector, a cleaning assembly and an automatic feeding assembly are arranged in the outer shell, and the automatic extraction assembly comprises a first motor and an extraction cup; the first motor drives the extraction cup to rotate, the grinder grinds raw materials, the extrusion assembly compacts powder, the top of the water injector is connected with an electric heating water pipe, the cleaning assembly cleans the extraction cup, and the automatic feeding assembly is used for adding filter paper. The extraction effect can be accelerated, meanwhile, high-pressure water can be provided for cleaning the extraction cup, the automatic cleaning function is achieved, and the automatic coffee extraction effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coffee machines, in particular to an extraction device for coffee machines based on rotation speed regulation. Background Art

[0002] The working principle of a coffee machine usually relies on the effects of heated water and pressure. The coffee machine first heats the water to an appropriate temperature. When the hot water passes through the coffee powder bed, the water comes into contact with the coffee powder and extracts soluble substances in the coffee, such as caffeine, oil, aroma substances and other flavor components. The extracted coffee liquid flows out through a filter or metal screen and enters the coffee cup, and a cup of extracted coffee is ready. Existing coffee machines can also intelligently determine the particle size of the ground coffee raw material according to the taste selected by the user to adjust the taste.

[0003] The filter or metal screen that the coffee liquid passes through is actually the extraction cup loaded with the coffee powder bed. The extraction cup is a detachable part that needs to be operated by the user to receive the ground powder, compact it, and install it under the extraction device. The extraction cup also needs to be cleaned after the extraction is completed. Coffee machine design engineers also realized that this is more troublesome to use, so they developed pre-installed coffee capsules, which use hot water under pressure to extract coffee, eliminating the need to clean or install the extraction cup. However, the non-recyclability of coffee capsule resources has caused a certain impact on the environment and there is a certain waste of resources. Therefore, from the perspective of sustainable development, using an extraction cup is the best choice, so there is a lack of automatic cleaning coffee machines. Summary of the invention

[0004] The object of the present invention is to provide an extraction device for a coffee machine based on speed control to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an extraction device for a coffee machine based on speed control, comprising an outer shell, wherein an automatic extraction component, a grinder, an extrusion component, a water injector, a cleaning component and an automatic feeding component are arranged inside the outer shell, wherein the automatic extraction component comprises a first motor and an extraction cup, wherein the first motor drives the extraction cup to rotate, the grinder grinds the raw material, the extrusion component compacts the powder, the top of the water injector is connected to an electric hot water pipe, the cleaning component cleans the extraction cup, and the automatic feeding component is used to add filter paper.

[0006] Furthermore, the top of the grinder passes through the outer shell, and the extrusion assembly is located on one side of the grinder. The extrusion assembly includes a second electric push rod and a compacting block. The compacting block is arranged on the piston rod of the second electric push rod. The user puts the coffee raw material into the grinder, and after starting the device, the device grinds the raw material into a corresponding particle size according to the user's selection, and the ground coffee raw material falls downward into the extraction cup. The first motor drives the first rotating arm to rotate, and the first rotating arm drives the extraction cup to move to the bottom of the extrusion assembly, and the second electric push rod drives the compacting block to move downward, and the ground granular raw material in the extraction cup is compacted by applying force. After the raw material is compacted, the coffee extraction work can start.

[0007] Furthermore, the automatic extraction component also includes a first rotating arm, which is mounted on a first motor. A servo motor is provided at one end of the first rotating arm away from the first motor. The motor shaft of the servo motor is connected to the extraction cup. The first motor moves the extraction cup to the bottom of the water injector through the first rotating arm. Water is transported to the electric hot water pipe to be heated. The hot water flows into the extraction cup through the water injector. Subsequently, the extracted coffee liquid flows out from the bottom of the extraction cup. The user uses the cup to receive the extracted coffee liquid. After a certain flow rate is reached, the control system stops adding water to the electric hot water pipe and the extraction stops.

[0008] Furthermore, the cleaning assembly includes a water receiving tray, a slag discharge pipe, a top cover body and a pair of multi-stage electric push rods, the pair of multi-stage electric push rods are invertedly installed on the inner wall of the outer shell, the piston rods of the pair of multi-stage electric push rods are connected with the top cover body, the water receiving tray is located below the top cover body, the slag discharge pipe is connected to the bottom of the water receiving tray, and the bottom of the slag discharge pipe passes through the outer shell. When a round of extraction is completed, the first motor moves the extraction cup to the top of the water receiving tray through the first rotating arm, and the multi-stage electric push rod moves the top cover body downward to cover the entire extraction cup. The servo motor first drives the extraction cup to move upward to cover the entire extraction cup. The extraction cup is driven to rotate rapidly, and the debris in the extraction cup is thrown out by centrifugal force. The spray head sprays water downward, and the servo motor drives the extraction cup to rotate slowly to clean the extraction cup. At the same time, the debris thrown onto the top cover is washed down and discharged through the slag discharge pipe at the bottom of the water receiving tray. After cleaning, the servo motor drives the extraction cup to rotate rapidly again to throw out the remaining water, and the multi-stage electric push rod lifts the top cover upward. The cleaning component cooperates with the automatic extraction component to realize automatic cleaning of the extraction cup, eliminating the trouble of manual cleaning.

[0009] Furthermore, the automatic loading assembly includes a third motor, a second rotating arm, a first electric push rod and an electric suction cup, the third motor is invertedly mounted on the inner wall of the outer shell, the second rotating arm is connected to the motor shaft of the third motor, the first electric push rod is mounted on an end of the second rotating arm away from the third motor, the electric suction cup is mounted on the piston rod of the first electric push rod, the first motor moves the extraction cup to the top of the vacuum machine through the first rotating arm, and the vacuum machine performs vacuuming. Since the bottom of the extraction cup is not sealed, the air pressure inside the vacuum machine will not decrease, and the pressure sensor at this time cannot detect the drop in air pressure.

[0010] Furthermore, the automatic feeding assembly also includes a vacuum machine and a filter paper box, a pressure sensor is arranged inside the vacuum machine, the pressure sensor is connected to the control system through a circuit, the filter paper box is slidably connected to the outer shell, filter paper is placed inside the filter paper box, the filter paper box passes through the outer shell, and a handle is installed on the side of the filter paper box extending out of the outer shell. The user places the filter paper in the filter paper box in advance and puts it into the outer shell, and the third motor drives the first electric push rod to move to the top of the filter paper box through the second rotating arm, and the first electric push rod pushes the electric suction cup downward so that the electric suction cup contacts the filter paper and sucks up the filter paper, and then the first electric push rod lifts the filter paper and moves it to the top of the extraction cup, and puts the filter paper into the extraction cup. The filter paper has a movable sealing property. After the filter paper seals the bottom of the extraction cup, due to the sudden drop in air pressure inside the vacuum machine, the pressure sensor detects the decrease in air pressure, indicating that the detection paper has been placed in place and can receive the ground coffee raw materials, the vacuum machine stops working, and the first motor drives the extraction cup to move away through the first rotating arm.

[0011] Furthermore, a gas-liquid supply assembly is arranged in the middle part of the outer shell, and the gas-liquid supply assembly includes a second motor, a first compression leather case, a second compression leather case and a partition plate, the second motor is fixedly installed on the partition plate, the first compression leather case and the second compression leather case are respectively arranged on both sides of the partition plate, and one end of the first compression leather case and the second compression leather case is fixedly installed on the partition plate.

[0012] Furthermore, the partition plate is provided with a first dial rotatably installed on one side of the first compression suitcase, and the partition plate is provided with a second dial rotatably installed on one side of the second compression suitcase, and a return coil spring is provided at the transition between the first dial and the second dial and the partition plate, and the other end of the first compression suitcase is connected to the first dial, and the other end of the second compression suitcase is connected to the second dial, and the second motor drives the first rotating disk and the second rotating disk to rotate simultaneously. When the second motor rotates forward, the elastic ratchet on the first rotating disk contacts the telescopic wedge on the first dial, and the elastic ratchet resists the telescopic wedge, and the first dial is driven to rotate through the telescopic wedge. When the first dial is driven to rotate, the first compression suitcase will be compressed, and the elastic ratchet on the second rotating disk on the other side contacts the telescopic wedge on the second dial, and the elastic ratchet can be deflected and will not resist the telescopic wedge, but will pass the telescopic wedge, and the second dial remains stationary;

[0013] When the second motor reverses, the elastic ratchet on the second turntable presses against the telescopic wedge on the second dial, the second dial is driven to rotate, the second compression suitcase will be compressed, and the elastic ratchet on the first turntable on the other side deflects over the telescopic wedge on the second dial, and the first dial remains stationary.

[0014] The first and second levers are configured to move relative to each other so that the first and second levers are in a position to move relative to each other and the first and second levers are in a position to move relative to each other so that the first and second levers can move relative to each other.

[0015] When the second motor rotates in the reverse direction, the second turntable also compresses the second compression suitcase repeatedly using the second dial.

[0016] Furthermore, elastic ratchets are rotatably provided on the outer contours of the first turntable and the second turntable, and the rotation directions of the two elastic ratchets are opposite. An air inlet and an air inlet pipe are provided on the first compression suitcase, one end of the air inlet pipe is connected to the water injector, and one end of the second compression suitcase is connected to the water source pipe and the water inlet pipe. A spray head is installed inside the top cover body, and one end of the water inlet pipe is connected to the spray head. When the first compression suitcase is repeatedly compressed, the air inlet pipe will be used to press gas into the water injector, so that hot water can quickly penetrate into the compressed raw material particles to accelerate the extraction effect. When the second compression suitcase is compressed, water is pressed into the spray head through the water inlet pipe. When the second compression suitcase is reset, water is absorbed through the water source pipe and waits for the next compression. Through the setting of the gas-liquid supply component, the extraction effect can be accelerated and high-pressure water can be provided to clean the extraction cup, thereby realizing the function of automatic cleaning and achieving the effect of automatic coffee extraction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The servo motor is first used to drive the extraction cup to rotate rapidly, and the centrifugal force throws out the debris in the extraction cup. The spray head sprays water downward, and the servo motor then drives the extraction cup to rotate slowly to clean the extraction cup. At the same time, the debris thrown onto the top cover is washed down. After cleaning, the servo motor drives the extraction cup to rotate rapidly again to throw out the remaining water. The cleaning component cooperates with the automatic extraction component to realize automatic cleaning of the extraction cup, eliminating the trouble of manual cleaning. The setting of the gas-liquid supply component can not only speed up the extraction effect, but also provide high-pressure water to clean the extraction cup, realizing the function of automatic cleaning and achieving the effect of automatic coffee extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall appearance structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall appearance structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 The internal structure of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 4 The internal structure of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 5 The internal structure of the present invention is shown in FIG. Figure 3 ;

[0024] Figure 6 The structure of the gas-liquid supply assembly of the present invention is shown in FIG. Figure 1;

[0025] Figure 7 The structure of the gas-liquid supply assembly of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 8 It is a schematic diagram of the structure of the cleaning component of the present invention.

[0027] In the figure: 1. outer shell; 2. first motor; 3. first rotating arm; 5. extraction cup; 6. grinder; 7. water injector; 8. electric hot water pipe; 9. air inlet pipe; 10. water receiving tray; 11. slag discharge pipe; 12. top cover; 13. spray head; 14. multi-stage electric push rod; 15. water inlet pipe; 16. second motor; 17. first compression leather case; 18. second compression leather case; 19. partition plate; 20. first dial; 21. second dial; 22. telescopic wedge; 23. first turntable; 24. second turntable; 25. elastic ratchet; 26. third motor; 27. second rotating arm; 28. first electric push rod; 29. ​​electric suction cup; 30. vacuum machine; 31. filter paper box; 32. second electric push rod; 33. compacting block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution, an extraction device for a coffee machine based on speed control, comprising an outer shell 1, wherein an automatic extraction component, a grinder 6, an extrusion component, a water injector 7, a cleaning component and an automatic feeding component are arranged inside the outer shell 1, and the automatic extraction component comprises a first motor 2 and an extraction cup 5, wherein the first motor 2 drives the extraction cup 5 to rotate, the grinder 6 grinds the raw material, the extrusion component compacts the powder, the top of the water injector 7 is connected to an electric hot water pipe 8, the cleaning component cleans the extraction cup 5, and the automatic feeding component is used to add filter paper.

[0030] The top of the grinder 6 passes through the outer shell 1, and the extrusion assembly is located on one side of the grinder 6. The extrusion assembly includes a second electric push rod 32 and a compacting block 33. The compacting block 33 is arranged on the piston rod of the second electric push rod 32. The automatic extraction assembly also includes a first rotating arm 3, which is installed on the first motor 2. A servo motor is arranged at one end of the first rotating arm 3 away from the first motor 2. The motor shaft of the servo motor is connected to the extraction cup 5. The user puts the coffee raw material into the grinder 6. After starting the device, the device grinds the raw material into a corresponding particle size according to the user's choice. The ground coffee raw material falls downward into the extraction cup 5, and the first motor 2 drives the first The rotating arm 3 rotates, and the first rotating arm 3 drives the extraction cup 5 to move to the bottom of the extrusion assembly. The second electric push rod 32 drives the compacting block 33 to move downward, and the ground granular raw materials in the extraction cup 5 are compacted by applying force. After the raw materials are compacted, the coffee extraction work can be started. The first motor 2 moves the extraction cup 5 to the bottom of the water injector 7 through the first rotating arm 3, and the water is transported to the electric hot water pipe 8 to be heated. The hot water flows into the extraction cup 5 through the water injector 7, and then the extracted coffee liquid flows out from the bottom of the extraction cup 5. The user uses a cup to receive the extracted coffee liquid. After reaching a certain flow rate, the control system stops adding water to the electric hot water pipe 8, and the extraction stops.

[0031] The cleaning assembly includes a water receiving tray 10, a slag discharge pipe 11, a top cover body 12 and a pair of multi-stage electric push rods 14. The pair of multi-stage electric push rods 14 are invertedly installed on the inner wall of the outer shell 1. The piston rods of the pair of multi-stage electric push rods 14 are connected to the top cover body 12. The water receiving tray 10 is located below the top cover body 12. The slag discharge pipe 11 is connected to the bottom of the water receiving tray 10. The bottom of the slag discharge pipe 11 passes through the outer shell 1. When a round of extraction is completed, the first motor 2 moves the extraction cup 5 to the top of the water receiving tray 10 through the first rotating arm 3, and the multi-stage electric push rods 14 move the top cover body 12 downward to cover the entire extraction cup 5. The servo motor First, the extraction cup 5 is driven to rotate rapidly, and the debris in the extraction cup 5 is thrown out by centrifugal force, and the spray head 13 sprinkles water downward, and the servo motor then drives the extraction cup 5 to rotate slowly to clean the extraction cup 5, and at the same time, the debris thrown onto the top cover body 12 is washed down, and the debris is discharged through the slag discharge pipe 11 at the bottom of the water receiving tray 10. After cleaning, the servo motor drives the extraction cup 5 to rotate rapidly again to throw out the residual water, and the multi-stage electric push rod 14 lifts the top cover body 12 upward. The cleaning component cooperates with the automatic extraction component to realize automatic cleaning of the extraction cup 5, eliminating the trouble of manual cleaning.

[0032] The automatic feeding assembly includes a third motor 26, a second rotating arm 27, a first electric push rod 28 and an electric suction cup 29. The third motor 26 is invertedly mounted on the inner wall of the outer shell 1. The second rotating arm 27 is connected to the motor shaft of the third motor 26. The first electric push rod 28 is mounted on the end of the second rotating arm 27 away from the third motor 26. The electric suction cup 29 is mounted on the piston rod of the first electric push rod 28. The automatic feeding assembly also includes a vacuum machine 30 and a filter paper box 31. A pressure sensor is arranged inside the vacuum machine 30. The pressure sensor is connected to the control system through a circuit. The filter paper box 31 is slidably connected to the outer shell 1. Filter paper is placed inside the filter paper box 31. The filter paper box 31 passes through the outer shell 1. A handle is installed on the side of the filter paper box 31 extending out of the outer shell 1. The user places the filter paper in the filter paper box 31 in advance and puts it into the outer shell 1. The first motor 2 moves the extraction cup 5 through the first rotating arm 3. The third motor 26 drives the first electric push rod 28 to move to the top of the filter paper box 31 through the second rotating arm 27, and the first electric push rod 28 pushes the electric suction cup 29 downward to make the electric suction cup 29 contact the filter paper and suck up the filter paper, and then the first electric push rod 28 lifts the filter paper and moves it to the top of the extraction cup 5, and puts the filter paper into the extraction cup 5. The filter paper has a movable sealing property. After the filter paper seals the bottom of the extraction cup 5, the air pressure inside the vacuum machine 30 drops sharply. After the pressure sensor detects the decrease in air pressure, it means that the detection paper has been placed in place and can receive the ground coffee raw materials. The vacuum machine 30 stops working, and the first motor 2 drives the extraction cup 5 to move away through the first rotating arm 3.

[0033] A gas-liquid supply assembly is arranged in the middle of the outer shell 1, and the gas-liquid supply assembly includes a second motor 16, a first compression leather case 17, a second compression leather case 18 and a partition plate 19. The second motor 16 is fixedly installed with the partition plate 19, and the first compression leather case 17 and the second compression leather case 18 are respectively arranged on both sides of the partition plate 19. One end of the first compression leather case 17 and the second compression leather case 18 is fixedly installed on the partition plate 19, and a first dial 20 is rotatably installed on one side of the partition plate 19 on which the first compression leather case 17 is installed, and a second dial 21 is rotatably installed on one side of the partition plate 19 on which the second compression leather case 18 is installed. A return coil spring is arranged at the junction of the first dial 20 and the second dial 21 with the partition plate 19, the other end of the first compression leather case 17 is connected to the first dial 20, and the other end of the second compression leather case 18 is connected to the second dial 21, and the second motor 16 drives the first turntable 23 and the second turntable 24 to rotate simultaneously. When the second motor 16 rotates forward, the elastic ratchet 25 on the first rotary disk 23 contacts the telescopic wedge 22 on the first dial 20, and the elastic ratchet 25 resists the telescopic wedge 22, and the first dial 20 is driven to rotate through the telescopic wedge 22. When the first dial 20 is driven to rotate, the first compression leather case 17 will be compressed, and the elastic ratchet 25 on the second rotary disk 24 on the other side contacts the telescopic wedge 22 on the second dial 21, and the elastic ratchet 25 can be deflected and will not resist the telescopic wedge 22, but will pass over the telescopic wedge 22, and the second dial 21 remains stationary. When the second motor 16 is reversed, the elastic ratchet 25 on the second rotary disk 24 resists the telescopic wedge 22 on the second dial 21, and the second dial 21 is driven to rotate, and the second compression leather case 18 will be compressed, and the elastic ratchet 25 on the first rotary disk 23 on the other side deflects over the telescopic wedge 22 on the second dial 21, and the first dial 20 remains stationary.

[0034] A telescopic wedge 22 is slidably installed on the side of the first dial 20 and the second dial 21 away from the partition plate 19, and a spring is arranged between the two telescopic wedges 22 and the first dial 20 and the second dial 21, and the inclined surfaces of the two telescopic wedges 22 face oppositely. A first turntable 23 and a second turntable 24 are arranged on the side of the first compression leather case 17 and the second compression leather case 18 away from the partition plate 19, and the first turntable 23 and the second turntable 24 are both connected to the motor shaft of the second motor 16. Elastic ratchets 25 are rotatably arranged on the outer contours of the first turntable 23 and the second turntable 24, and the rotation directions of the two elastic ratchets 25 are opposite. An air inlet and an air inlet pipe 9 are arranged on the first compression leather case 17, and one end of the air inlet pipe 9 is connected to the water injector 7, and one end of the second compression leather case 18 is connected to the water source pipe and the water inlet pipe 15, and a spray head 13 is installed inside the top cover body 12, and one end of the water inlet pipe 15 is connected to the spray head 13.

[0035] When the first compression leather case 17 is compressed to the limit position, as the squeezing force between the elastic ratchet 25 and the telescopic wedge 22 increases, slippage occurs between the inclined surface of the telescopic wedge 22 and the elastic ratchet 25, and the telescopic wedge 22 is forced to retract toward the first dial 20 until the telescopic wedge 22 is completely retracted into the first dial 20, and the elastic ratchet 25 rotates past the telescopic wedge 22. Under the action of the reset coil spring, the first dial 20 quickly rotates, and the first compression leather case 17 is pulled open again, and the telescopic wedge 22 is re-extended under the action of the spring until the elastic ratchet 25 again presses against the telescopic wedge 22, causing the first compression leather case 17 to be compressed, and the second motor 16 reverses. When the second compression case 18 is compressed, water is pressed into the sprinkler 13 through the water inlet pipe 15. When the second compression case 18 is reset, water is absorbed through the water source pipe and waits for the next compression. By setting the gas-liquid supply component, the extraction effect can be accelerated and high-pressure water can be provided to clean the extraction cup 5, thereby realizing the function of automatic cleaning and achieving the effect of automatic coffee extraction.

[0036] The working principle of the present invention is as follows: the user puts the coffee raw material into the grinder 6, and after starting the device, the device grinds the raw material into the corresponding particle size according to the user's selection, and the ground coffee raw material falls downward into the extraction cup 5, and the first motor 2 drives the first rotating arm 3 to rotate, and the first rotating arm 3 drives the extraction cup 5 to move to the bottom of the extrusion assembly, and the second electric push rod 32 drives the compacting block 33 to move downward, and compacts the ground granular raw material in the extraction cup 5 by applying force. After the raw material is compacted, the coffee extraction work can be started, and the first motor 2 moves the extraction cup 5 to the bottom of the water injector 7 through the first rotating arm 3, and the water is transported to the electric hot water pipe 8 to be heated, and the hot water flows into the extraction cup 5 through the water injector 7, and then the extracted coffee liquid flows out from the bottom of the extraction cup 5, and the user uses a cup to receive the extracted coffee liquid. After a certain flow rate is reached, the control system stops adding water to the electric hot water pipe 8, and the extraction stops.

[0037] When one round of extraction is completed, the first motor 2 moves the extraction cup 5 to the top of the water receiving tray 10 through the first rotating arm 3, and the multi-stage electric push rod 14 moves the top cover body 12 downward to cover the entire extraction cup 5. The servo motor first drives the extraction cup 5 to rotate rapidly, and uses centrifugal force to throw out the debris in the extraction cup 5. The spray head 13 sprinkles water downward, and the servo motor drives the extraction cup 5 to rotate slowly to clean the extraction cup 5. At the same time, the debris thrown onto the top cover body 12 is washed down together, and the debris is discharged through the slag discharge pipe 11 at the bottom of the water receiving tray 10. After cleaning, the servo motor drives the extraction cup 5 to rotate rapidly again to throw out the residual water, and the multi-stage electric push rod 14 lifts the top cover body 12 upward. The cleaning component cooperates with the automatic extraction component to realize automatic cleaning of the extraction cup 5, eliminating the trouble of manual cleaning.

[0038] The user places the filter paper in the filter paper box 31 in advance, and the filter paper is placed in the outer shell 1. The first motor 2 moves the extraction cup 5 to the top of the vacuum machine 30 through the first rotating arm 3. The vacuum machine 30 performs air extraction. Since the bottom of the extraction cup 5 is not sealed, the air pressure inside the vacuum machine 30 will not decrease. At this time, the pressure sensor cannot detect the decrease in air pressure. The third motor 26 drives the first electric push rod 28 to move to the top of the filter paper box 31 through the second rotating arm 27. The first electric push rod 28 pushes the electric suction cup 29 downward so that the electric suction cup 29 contacts the filter paper and sucks up the filter paper. Then the first electric push rod 28 lifts the filter paper and moves it to the top of the extraction cup 5, and the filter paper is placed in the extraction cup 5. The filter paper has a movable sealing property. After the filter paper seals the bottom of the extraction cup 5, the air pressure inside the vacuum machine 30 drops suddenly. After the pressure sensor detects the decrease in air pressure, it means that the detection paper has been placed in place and can receive the ground coffee raw materials. The vacuum machine 30 stops working, and the first motor 2 drives the extraction cup 5 to move away through the first rotating arm 3.

[0039] The second motor 16 drives the first turntable 23 and the second turntable 24 to rotate simultaneously. When the second motor 16 rotates forward, the elastic ratchet 25 on the first turntable 23 contacts the telescopic wedge 22 on the first dial 20, and the elastic ratchet 25 resists the telescopic wedge 22, and the first dial 20 is driven to rotate through the telescopic wedge 22. When the first dial 20 is driven to rotate, the first compression suitcase 17 will be compressed, and the elastic ratchet 25 on the second turntable 24 on the other side contacts the telescopic wedge 22 on the second dial 21. When the second motor 16 is in reverse rotation, the elastic ratchet 25 on the second turntable 24 presses against the telescopic wedge 22 on the second dial 21, and the second dial 21 is driven to rotate. The second compression suitcase 18 will be compressed, and the elastic ratchet 25 on the first turntable 23 on the other side deflects and passes over the telescopic wedge 22 on the second dial 21, and the first dial 20 remains stationary.

[0040] When the first compression leather case 17 is compressed to the limit position, as the squeezing force between the elastic ratchet 25 and the telescopic wedge 22 increases, slippage occurs between the inclined surface of the telescopic wedge 22 and the elastic ratchet 25, and the telescopic wedge 22 is forced to retract toward the first dial 20 until the telescopic wedge 22 is completely retracted into the first dial 20, and the elastic ratchet 25 rotates past the telescopic wedge 22. Under the action of the reset coil spring, the first dial 20 quickly rotates, and the first compression leather case 17 is pulled open again, and the telescopic wedge 22 is re-extended under the action of the spring until the elastic ratchet 25 again presses against the telescopic wedge 22, causing the first compression leather case 17 to be compressed, and the second motor 16 reverses. When the second compression case 18 is compressed, water is pressed into the sprinkler 13 through the water inlet pipe 15. When the second compression case 18 is reset, water is absorbed through the water source pipe and waits for the next compression. By setting the gas-liquid supply component, the extraction effect can be accelerated and high-pressure water can be provided to clean the extraction cup 5, thereby realizing the function of automatic cleaning and achieving the effect of automatic coffee extraction.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An extraction device for a coffee machine based on speed control, characterized in that: The invention comprises an outer shell (1), wherein an automatic extraction component, a grinder (6), an extrusion component, a water injector (7), a cleaning component and an automatic feeding component are arranged inside the outer shell (1); the automatic extraction component comprises a first motor (2) and an extraction cup (5); the first motor (2) drives the extraction cup (5) to rotate; the grinder (6) grinds the raw material; the extrusion component compacts the powder; the top of the water injector (7) is connected to an electric hot water pipe (8); the cleaning component cleans the extraction cup (5); and the automatic feeding component is used to add filter paper.

2. The extraction device for a coffee machine based on speed control according to claim 1, characterized in that: The top of the grinder (6) passes through the outer shell (1), and the extrusion assembly is located on one side of the grinder (6). The extrusion assembly includes a second electric push rod (32) and a compacting block (33), and the compacting block (33) is arranged on the piston rod of the second electric push rod (32).

3. The extraction device for a coffee machine based on speed control according to claim 1, characterized in that: The automatic extraction component further comprises a first rotating arm (3), wherein the first rotating arm (3) is mounted on the first motor (2), and a servo motor is arranged at one end of the first rotating arm (3) away from the first motor (2), wherein the motor shaft of the servo motor is connected to the extraction cup (5).

4. The extraction device for a coffee machine based on speed control according to claim 1, characterized in that: The cleaning assembly comprises a water receiving tray (10), a slag discharge pipe (11), a top cover body (12) and a pair of multi-stage electric push rods (14); the pair of multi-stage electric push rods (14) are invertedly mounted on the inner wall of the outer shell (1); the piston rods of the pair of multi-stage electric push rods (14) are connected to the top cover body (12); the water receiving tray (10) is located below the top cover body (12); the slag discharge pipe (11) is connected to the bottom of the water receiving tray (10); and the bottom of the slag discharge pipe (11) passes through the outer shell (1).

5. The extraction device for a coffee machine based on speed control according to claim 4, characterized in that: The automatic loading assembly comprises a third motor (26), a second rotating arm (27), a first electric push rod (28) and an electric suction cup (29); the third motor (26) is invertedly mounted on the inner wall of the outer shell (1); the second rotating arm (27) is connected to the motor shaft of the third motor (26); the first electric push rod (28) is mounted on an end of the second rotating arm (27) away from the third motor (26); and the electric suction cup (29) is mounted on the piston rod of the first electric push rod (28).

6. The extraction device for a coffee machine based on speed control according to claim 5, characterized in that: The automatic feeding assembly further comprises a vacuum machine (30) and a filter paper box (31); a pressure sensor is arranged inside the vacuum machine (30); the pressure sensor is connected to a control system via a circuit; the filter paper box (31) is slidably connected to the outer shell (1); filter paper is placed inside the filter paper box (31); the filter paper box (31) penetrates the outer shell (1); and a handle is installed on one side of the filter paper box (31) extending out of the outer shell (1).

7. The extraction device for a coffee machine based on speed control according to claim 4, characterized in that: A gas-liquid supply assembly is arranged in the middle of the outer shell (1), and the gas-liquid supply assembly includes a second motor (16), a first compression leather case (17), a second compression leather case (18) and a partition plate (19). The second motor (16) is fixedly mounted on the partition plate (19), the first compression leather case (17) and the second compression leather case (18) are respectively arranged on both sides of the partition plate (19), and one end of the first compression leather case (17) and the second compression leather case (18) are fixedly mounted on the partition plate (19).

8. The extraction device for a coffee machine based on speed control according to claim 7, characterized in that: The partition plate (19) is provided with a first dial (20) rotatably mounted on one side of the first compression suitcase (17), and a second dial (21) is rotatably mounted on one side of the partition plate (19) on which the second compression suitcase (18) is mounted. A return coil spring is provided at the junction of the first dial (20) and the second dial (21) with the partition plate (19). The other end of the first compression suitcase (17) is connected to the first dial (20), and the other end of the second compression suitcase (18) is connected to the second dial (21).

9. The extraction device for a coffee machine based on speed control according to claim 8, characterized in that: A telescopic wedge (22) is slidably installed on the side of the first dial (20) and the second dial (21) away from the partition plate (19), and a spring is arranged between the two telescopic wedges (22) and the first dial (20) and the second dial (21), and the inclined surfaces of the two telescopic wedges (22) face oppositely. A first turntable (23) and a second turntable (24) are arranged on the side of the first compression suitcase (17) and the second compression suitcase (18) away from the partition plate (19), and the first turntable (23) and the second turntable (24) are connected to the motor shaft of the second motor (16).

10. The extraction device for a coffee machine based on speed control according to claim 9, characterized in that: Elastic ratchets (25) are rotatably arranged on the outer contours of the first rotating disk (23) and the second rotating disk (24), and the rotation directions of the two elastic ratchets (25) are opposite. The first compression leather case (17) is provided with an air inlet and an air inlet pipe (9), one end of the air inlet pipe (9) is connected to the water injector (7), one end of the second compression leather case (18) is connected to a water source pipe and a water inlet pipe (15), and a spray head (13) is installed inside the top cover body (12), and one end of the water inlet pipe (15) is connected to the spray head (13).

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