Automatic extraction device and coffee machine

Abstract

The invention relates to an automatic extraction device which comprises a support, a hydraulic extraction assembly and an extraction cup, the hydraulic extraction assembly comprises a swing seat, an extraction head, a piston and an elastic reset piece, and the extraction head is guided by a guide groove in the support in the process that the hydraulic piston moves from an initial position to an extraction position. The extraction head moves downwards from the initial inclined state, swings to the vertical state along with the swing seat and then continues to move downwards to be pressed into the extraction cavity for powder pressing and extraction operation, the extraction head can avoid the powder guide assembly in the process of swinging and moving downwards, interference with the powder guide assembly is avoided, the vertical moving stroke of the extraction head is shortened, and the extraction efficiency is improved. Therefore, the occupied volume can be reduced, and the coffee machine is more miniaturized.

Description

TECHNICAL FIELD

[0001] The present application relates to coffee extraction technology, more particularly, to an automatic extraction device and coffee machine. BACKGROUND

[0002] With the improvement of people's living standards, coffee is more and more popular with the public consumers, and coffee machines have gradually entered people's daily life. As an automatic device containing functions such as grinding, powder loading, powder pressing and extraction, the full-automatic coffee machine has been widely used in families or commercial places. In the prior art, there is a full-automatic coffee machine using hydraulic power to press the powder, for example, CN120436476A discloses an automatic powder pressing and brewing device, which drives the powder pressing mechanism to move up and down to press the powder and restore to the original position through a hydraulic assembly, and integrates the brewing water inlet on the powder pressing mechanism to make it have the functions of powder pressing and brewing. However, since the powder pressing mechanism moves vertically up and down in the powder pressing chamber, it will interfere with the powder feeding channel, resulting in the design of the powder feeding channel being complicated. Moreover, the powder pressing mechanism needs to move up to the top of the powder feeding channel before the powder can be fed from the powder feeding channel to the funnel, which results in a long up-and-down travel of the powder pressing mechanism, thereby making the overall volume of the coffee machine large and not conducive to miniaturization. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an automatic extraction device which does not interfere with the powder guide channel and a coffee machine using the automatic extraction device, in view of the above-mentioned defects of the prior art.

[0004] The application discloses an automatic extraction device, which comprises a support, a hydraulic extraction assembly arranged in the support and an extraction cup arranged at the bottom of the support. The extraction cup has an extraction cavity. The hydraulic extraction assembly comprises a swing base which is rotatably arranged at the upper portion of the support and can swing back and forth in the support. The swing base is provided with a first water flow channel and a first hydraulic waterway joint connected with the first water flow channel. The extraction head is provided with a hydraulic cavity, a second water flow channel separated from the hydraulic cavity and a second hydraulic waterway joint connected with the second water flow channel. The end of the hydraulic cavity of the extraction head away from the swing base is provided with a water injection part connected with the second water flow channel. A piston is sealingly arranged in the hydraulic cavity and can move back and forth along the extension direction of the hydraulic cavity between an initial position and an extraction position. The piston is fixedly connected with the swing base through a connecting rod arranged at the end of the hydraulic cavity of the extraction head close to the swing base. The connecting rod and the piston are provided with a third water flow channel penetrating through and connected with the first water flow channel along the extension direction of the hydraulic cavity. An elastic reset part is arranged between the extraction head and the piston to reset the piston from the extraction position to the initial position. The extraction head is further provided with a guide column penetrating through a guide groove arranged on the support. The guide groove is provided with a first inclined groove inclined to one side of the swing direction of the swing base and a second vertical groove connected with the lower end of the first inclined groove. When the first hydraulic waterway joint is connected with the first hydraulic water flow, the piston moves from the initial position to the extraction position in the hydraulic cavity of the extraction head, and drives the extraction head to move downward along the first inclined groove from the initial inclined state, and swing to the vertical state with the swing base, and then move downward along the second vertical groove and sealingly press into the extraction cavity of the extraction cup to compact the powder. Then, the second hydraulic waterway joint is connected with the second hydraulic water flow to inject water into the extraction cavity through the water injection part for extraction.

[0005] According to an embodiment of the automatic extraction device, the extraction head is fixedly provided with a sealing plug at the end of the hydraulic cavity away from the swing base. The water injection part is fixedly arranged at the end of the sealing plug away from the swing base. The water injection part is further provided with a filter screen.

[0006] According to an embodiment of the automatic extraction device, the water injection part is a shower type water distribution disc.

[0007] According to an embodiment of the automatic extraction device, the outer periphery of the piston is provided with a piston sealing ring sealingly connected with the hydraulic cavity. The outer periphery of the end of the extraction head away from the swing base is provided with an extraction sealing ring sealingly connected with the extraction cavity.

[0008] In one embodiment of the automatic extraction device according to the first aspect of the present application, the upper portion of the support is provided with a rotating shaft, and the swing seat is rotatably mounted on the rotating shaft.

[0009] In one embodiment of the automatic extraction device according to the first aspect of the present application, one side of the swing seat on the support above the extraction cavity of the extraction cup is provided with a powder guiding assembly for receiving powder, and the powder guiding assembly has a powder guiding channel arranged obliquely to guide the received powder into the extraction cavity; and the extraction head avoids the powder guiding channel during the process of swinging from the initial oblique state to the vertical state while moving from the initial position to the extraction position.

[0010] In one embodiment of the automatic extraction device according to the first aspect of the present application, the swing seat is further provided with a baffle that opens and closes the upper end of the powder guiding channel with the rotation of the swing seat.

[0011] In one embodiment of the automatic extraction device according to the first aspect of the present application, the baffle has a first plate fixed to the side of the swing seat opposite to the powder guiding channel and extending along the extension direction of the hydraulic cavity, and a second plate obliquely extending from the lower end of the first plate towards the powder guiding channel; when the swing seat swings towards the side where the powder guiding assembly is located, the second plate is inserted into the upper end of the powder guiding channel to close the powder guiding channel; and when the swing seat swings back to the original position, the second plate is driven away from the powder guiding channel to open the powder guiding channel.

[0012] In one embodiment of the automatic extraction device according to the first aspect of the present application, the outer side of the powder guiding channel is further provided with a vibration self-cleaning assembly.

[0013] In the second aspect of the present application, a coffee machine is provided, which comprises a grinding device, an extraction device connected to the grinding device, and a first hydraulic waterway and a second hydraulic waterway connected to the extraction device; the extraction device is the automatic extraction device described above; and the first hydraulic waterway connector and the second hydraulic waterway connector of the automatic extraction device are connected to the first hydraulic waterway and the second hydraulic waterway, respectively.

[0014] The automatic extraction device and the coffee machine according to the present application have the following beneficial effects: according to the embodiment of the automatic extraction device of the present application, the extraction head is guided by the guide groove on the support during the process of moving from the initial position to the extraction position, and first swings from the initial oblique state to the vertical state while moving down, and then continues to move down to press into the extraction cavity for powder pressing and extraction operation; the extraction head can avoid the powder guiding assembly during the process of swinging and moving down, and not only avoids interference with the powder guiding assembly, but also reduces the up-and-down movement stroke of the extraction head, thereby reducing the occupied volume and making the coffee machine more compact. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a three-dimensional structural schematic diagram of an automatic extraction device according to an embodiment of this application; Figure 2 yes Figure 1 The diagram shows the external structure of the automatic extraction device and the grinding device in their initial state. Figure 3 yes Figure 2 The diagram shows the internal structure of the automatic extraction device and grinding device in their initial state. Figure 4 yes Figure 1 The diagram shows the external structure of the automatic extraction device in extraction mode, in conjunction with the grinding device. Figure 5 yes Figure 4 The diagram shows the internal structure of the automatic extraction device in extraction mode, in conjunction with the grinding device. Explanation of icon numbers: 100-Automatic extraction device; 10-Support; 11-Rotating shaft; 12-Guide groove; 121-First inclined groove; 122-Second vertical groove; 131-First position sensor; 132-Second position sensor; 20-Hydraulic extraction assembly; 21-Swing seat; 211-First water flow channel; 212-First hydraulic water circuit connector; 22-Extraction head; 221-Hydraulic chamber; 222-Second water flow channel; 223-Guide column; 224-Sealing plug; 225-Water injection component; 226-Filter screen; 227-Extraction filter 228-Second hydraulic water circuit connector; 229-Sensor trigger rod; 23-Piston; 231-Connecting rod; 232-Third water flow channel; 233-Piston sealing ring; 24-Elastic reset component; 30-Extraction cup; 31-Extraction chamber; 40-Powder guiding assembly; 41-Powder guiding channel; 50-Baffle; 51-First plate; 52-Second plate; 60-Vibration self-cleaning assembly; 81-First arrow; 82-Second arrow; 200-Grinding device; 300-First hydraulic water circuit; 400-Second hydraulic water circuit. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.

[0017] Figure 1 A schematic elevation view of an automatic extraction apparatus 100 according to one embodiment of this application is shown. See also: Figure 1As shown, the automatic extraction device 100 mainly consists of a support 10, a hydraulic extraction assembly 20, an extraction cup 30, a powder guiding assembly 40, a baffle 50, and a vibration self-cleaning assembly 60. The hydraulic extraction assembly 20 is disposed inside the support 10, the extraction cup 30 is disposed at the bottom of the support 10, and the powder guiding assembly 40 is disposed on one side of the support 10 (e.g., Figure 1 In the illustrated embodiment, the support 10 is located on the left side and above the extraction cup 30. The powder guiding assembly 40 is used to interface with the grinder 200 to guide the coffee powder ground by the grinder 200 into the extraction chamber 31 of the extraction cup 30 (see [reference]). Figures 2-4 The hydraulic extraction assembly 20 cooperates with the extraction chamber 31 of the extraction cup 30 to compact the coffee powder in the extraction chamber 31 under hydraulic pressure before extraction.

[0018] See details Figure 2 and Figure 3 As shown, the hydraulic extraction assembly 20 further includes a swing seat 21, an extraction head 22, a piston 23, and a resilient reset member 24. The swing seat 21 is rotatably mounted on the upper part of the support 10 in a manner that allows it to reciprocate within the support 10. See details. Figure 3 Combination Figure 1 As shown, the upper part of the support 10 is provided with a rotating shaft 11 extending back and forth. The swing seat 21 can be rotatably mounted on the rotating shaft 11 through, for example, an opening in the shaft hole, so that it can swing relative to the support 10 in the left and right direction. The extraction head 22 is cylindrical, forming a hydraulic chamber 221 inside. The piston 23 is sealed and slidably disposed in the hydraulic chamber 221 and can reciprocate between the initial position and the extraction position along the extension direction of the hydraulic chamber 221. Specifically, a piston sealing ring 233 is fitted on the outer periphery of the piston 23 and is sealed and slidably connected to the hydraulic chamber 221. The middle part of the piston 23 is also provided with a connecting rod 231 that passes through one end (i.e., the upper end) of the piston head 22 near the swing seat 21 in the extension direction of the hydraulic chamber and is fixedly connected to the middle part of the swing seat 21. In this way, the piston 23 can move relative to the extraction head 22 along the hydraulic chamber 221, and at the same time, it can also drive the extraction head 22 to swing around the rotating shaft 11 together with the swing seat 21. The elastic reset element 24 acts between the extraction head 22 and the piston 23 to reset the piston 23 from the extraction position to the initial position. See details... Figure 3 As shown, the elastic reset member 24 can be a compression spring that abuts against the piston 23 and the hydraulic chamber 221 near the swing seat 21 (i.e., the upper end). A sealing plug 224 is fixedly provided at the end of the hydraulic chamber 221 away from the swing seat 21 (i.e., the lower end) of the extraction head 22 to seal that end of the hydraulic chamber 221. A water injection member 225 is embedded and fixed at the end of the sealing plug 224 away from the swing seat 21, and a filter screen 226 may also be provided on the water injection member 225.

[0019] See further Figure 3As shown, the other side (i.e. the right side in the figure) of the swing seat 21 away from the powder guide assembly 40 is provided with a first hydraulic waterway joint 212, and the swing seat 21 is further provided with a first water flow passage 211 which is in communication with the first hydraulic waterway joint 212 and extends through the middle of the swing seat 21. The first hydraulic waterway joint 212 extends out of the support 10 and is used to connect the first hydraulic waterway 300. The piston 23 and its connecting rod 231 are provided with a third water flow passage 232 which extends along the direction of the hydraulic cavity and is in communication with the first water flow passage 211 of the swing seat 21. The third water flow passage 232 is used to connect the normal-temperature first hydraulic water flow of the first hydraulic waterway 300 to the hydraulic cavity 221 of the piston 23 away from the swing seat 21, so as to be used for hydraulic powder pressing operation. The other side (i.e. the right side in the figure) of the extraction head 22 away from the powder guide assembly 40 is provided with a second hydraulic waterway joint 228 and a second water flow passage 222 which is separated from the hydraulic cavity 221. The lower end of the second water flow passage 222 is in communication with the water injection member 225, and the upper end is in communication with the second hydraulic waterway joint 228 which extends out of the right side of the extraction head 22. The second hydraulic waterway joint 228 is used to connect the second hydraulic waterway 400, so as to connect the high-temperature and high-pressure second hydraulic water flow to the water injection member 225, which is used for extraction operation. The water injection member 225 is preferably a shower-type water distribution disc, so as to facilitate uniform extraction of coffee powder.

[0020] Referring again to Figure 2 In combination Figure 1 As shown, the front and back sides of the extraction head 22 are further provided with guide columns 223 which are respectively arranged in the front and back guide grooves 12 of the support 10. The guide columns 223 can be integrally formed on the extraction head 22. The guide grooves 12 are specially designed to be composed of a first inclined groove 121 which is inclined towards the side where the powder guide assembly 40 is located, and a second vertical groove 122 which is in communication with the lower end of the first inclined groove 121. When the guide column 223 is located at the upper end of the first inclined groove 121, referring to Figure 3As shown, the whole hydraulic extraction assembly 20 is in the initial tilting state, at this time the piston 23 is located at the end of the hydraulic chamber 221 farthest from the rotating seat 21 (i.e. the initial position), the upper end of the extraction head 22 abuts against the swing seat 21, and the lower end of the extraction head 22 is located on the side away from the powder guide assembly 40 (i.e. the right side of the powder guide assembly 40), which does not block the coffee powder in the powder guide assembly 40 from being guided into the extraction cavity 31 of the extraction cup 30. When the normal-temperature first hydraulic flow provided by the first hydraulic waterway 300 (as shown by the first arrow 81) continuously enters the hydraulic chamber 221 below the piston 23 through the first hydraulic waterway joint 212, the first water flow channel 211 and the second water flow channel 222, it acts against the elastic return of the elastic return member 24 to the sealing plug 224, thereby causing the extraction head 22 to move downward relative to the piston 23 in the direction of the hydraulic chamber extension away from the swing seat 21, while being guided by the guide column 223 along the first inclined groove 121 to swing towards the side where the powder guide assembly 40 is located (i.e. swing to the left), and when the guide column 223 moves out of the first inclined groove 121 and enters the second vertical groove 122, the extraction head 22 swings the whole hydraulic extraction assembly 20 to the vertical state, at this time the lower end of the extraction head 22 has avoided the powder guide assembly 40 and swung downward below the powder guide assembly 40. Then, the extraction head 22 continues to move downward along the second vertical groove 122 under the hydraulic action of the first hydraulic flow and seals and presses into the extraction cavity 31 of the extraction cup 30, compacting the coffee powder in the extraction cavity 31 into a cake (see Figure 3 and Figure 4 As shown, the piston 23 moves along the hydraulic chamber 221 to the extraction position. The lower end of the extraction head 22 away from the swing seat 21 is also sleeved with an extraction sealing ring 227 to realize sealed sliding connection with the extraction cavity 31. According to further embodiments of the present application, the stroke of the extraction head 22 moving downward along the second vertical groove 122 can be automatically adjusted by the pressure valve device provided in the first hydraulic waterway 300, for example, when the pressure of the first hydraulic flow in the first hydraulic waterway 300 reaches a certain threshold value, the pressure valve device is closed, thereby enabling the extraction head 22 to automatically adapt to the amount of powder in the extraction cup 30 for powder pressing operation, whether the amount of powder is large or small, the powder can be compacted into a cake, the cake density is uniform, uniform penetration and efficient extraction can be realized, and the coffee taste is stable, balanced and full of flavor. Referring again to Figure 4 and Figure 5As shown, after the powder compression operation is completed by the extraction head 22, the high-temperature and high-pressure second hydraulic water flow (as shown by the second arrow 82) provided by the second hydraulic water path 400 enters the water injection member 225 through the second hydraulic water path joint 228 and the second water flow channel 222, and then is injected into the extraction cup 31 through the water injection member 225 and the filter screen 226, so as to extract the compacted coffee powder cake and obtain coffee liquid. After the coffee extraction operation is completed, the first hydraulic water path 300 and the second hydraulic water path 400 both stop water supply, the pressure valve device in the first hydraulic water path 300 opens the pressure relief, and the piston 23 is reset from the extraction position to the initial position along the hydraulic chamber 221 under the elastic force of the elastic reset member 24, so that the first hydraulic water flow in the hydraulic chamber 221 is discharged through the third water flow channel 232, the first water flow channel 211 and the first hydraulic water path joint 212 (see the first arrow 81). At the same time, the extraction head 22 moves upward along the second vertical groove 122 of the guide groove 12, and then moves upward along the first inclined groove 121 while swinging back to the right together with the swing seat 21, and the entire hydraulic extraction assembly 20 returns to the initial inclined state, and the one-time automatic powder compression and extraction operation of the automatic extraction device 100 is completed.

[0021] Referring again to Figure 2 and Figure 4 As shown, the outer side of the bracket 10 corresponds to the upper end of the first inclined groove 121 and the lower end of the second vertical groove 122 of the guide groove 12, and is respectively provided with a first position sensor 131 and a second position sensor 132, and the guide column 223 of the extraction head 22 is further provided with a sensor triggering rod 229. When the guide column 223 of the extraction head 22 is located at the upper end of the first inclined groove 121, the sensor triggering rod 229 triggers the first position sensor 131, and the system can detect that the hydraulic extraction assembly 20 is in the initial inclined state. When the guide column 223 of the extraction head 22 is located at the lower end of the second vertical groove 122, the sensor triggering rod 229 triggers the second position sensor 132, and the system can detect that the extraction head 22 of the hydraulic extraction assembly 20 has moved to the lowest position, so as to control the first hydraulic water path 300 to stop water supply and realize the overpressure protection effect.

[0022] Further referring to Figure 3 and Figure 5As shown, the powder guide assembly 40 can be arranged above the extraction cavity 31 of the extraction cup 30 on the left side of the support 10 for receiving the coffee powder ground by the grinding device 200. Specifically, the powder guide assembly 40 has a powder guide channel 41 arranged obliquely for guiding the received powder into the extraction cavity 31. The extraction head 22 can just avoid the powder guide channel 41 during the process of swinging to the vertical state from the initial oblique state while moving from the initial position to the extraction position. In addition, the swing base 21 of the hydraulic extraction assembly 20 is further provided with a baffle 50 for opening and closing the upper end of the powder guide channel 41 with the rotation of the swing base 21. Specifically, the baffle 50 has a first plate 51 fixed to the left side of the swing base 21 opposite to the powder guide channel 41 and extending along the extension direction of the hydraulic cavity, and a second plate 52 obliquely extending from the lower end of the first plate 51 towards the powder guide channel 41. When the hydraulic extraction assembly 20 starts to operate for the press powder extraction operation, the swing base 21 swings to the left to reset, driving the second plate 52 to insert into the upper end of the powder guide channel 41 to close the powder guide channel 41, avoiding the powder from falling. When the hydraulic extraction assembly 20 is reset after completing the extraction, the swing base 21 swings to the right to reset, driving the second plate 52 away from the powder guide channel 41 to open the powder guide channel 41, so that the powder ground by the grinding device 200 can fall into the extraction cavity 31 along the powder guide channel 41 for the next press powder extraction operation. Further, referring to Figure 3 and Figure 5 As shown, the powder guide assembly 40 is further provided with a vibration self-cleaning assembly 60 outside the powder guide channel 41, which can generate vibration to the powder guide channel 41 by, for example, a vibration motor, shake off all the powder attached to the inner surface of the powder guide channel 41 and fall into the extraction cavity 31, ensuring that the powder does not remain in the powder guide channel 41, avoiding the problems of blockage and powder falling into the machine.

[0023] According to the automatic extraction device 100 of the above-mentioned embodiments of the present application, the extraction head 22 is guided by the guide groove 12 on the support 10 to swing together with the swing base 21 from the initial oblique state to the vertical state during the process of moving from the initial position to the extraction position of the hydraulic piston 23, and then continues to move downward to press into the extraction cavity 31 for the press powder and extraction operation. The extraction head 22 can avoid the powder guide assembly 40 during the process of swinging and moving downward, not only avoiding interference with the powder guide assembly 40, but also reducing the up-and-down movement stroke of the extraction head 22, thereby reducing the occupied volume.

[0024] Based on the automatic extraction device 100 described above, the application further proposes a coffee machine, which comprises a grinding device 200, the automatic extraction device 100 connected with the grinding device 200, and a first hydraulic waterway 300 and a second hydraulic waterway 400 connected with the first hydraulic waterway joint 212 and the second hydraulic waterway joint 228 of the automatic extraction device 100 respectively. The coffee machine of the application can realize automatic and self-adaptive press powder extraction operation through the cooperation of the first hydraulic waterway 300, the second hydraulic waterway 400 and the automatic extraction device 100.

[0025] The above only describes the preferred embodiments of the application and is not used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. An automatic extraction device comprising a support, a hydraulic extraction assembly arranged in the support and an extraction cup arranged at the bottom of the support, the extraction cup having an extraction chamber, characterized in that, The hydraulic extraction assembly comprises: a swing base rotatably mounted on the upper part of the support in a reciprocating swing manner, the swing base being provided with a first water flow channel and a first hydraulic waterway connector communicating with the first water flow channel; an extraction head provided with a hydraulic cavity and a second water flow channel separated from the hydraulic cavity and a second hydraulic waterway connector communicating with the second water flow channel, the end of the hydraulic cavity of the extraction head away from the swing base being provided with a water injection member communicating with the second water flow channel; a piston sealingly sliding in the hydraulic cavity and reciprocally movable along the extension direction of the hydraulic cavity between an initial position and an extraction position, the piston being fixedly connected to the swing base at the end of the extension direction of the hydraulic cavity of the extraction head close to the swing base, the connecting rod and the piston being provided with a third water flow channel penetrating through and communicating with the first water flow channel along the extension direction of the hydraulic cavity; a resilient reset member acting between the extraction head and the piston to reset the piston from the extraction position to the initial position; wherein the extraction head is further provided with a guide column penetrating into a guide groove correspondingly provided on the support, the guide groove having a first inclined groove inclined toward one side of the swing direction of the swing base and a second vertical groove communicating with the lower end of the first inclined groove; when the first hydraulic waterway connector is connected to the first hydraulic water flow, the piston is moved from the initial position to the extraction position in the hydraulic cavity of the extraction head, which drives the extraction head to move downward along the first inclined groove from the initial inclined state, swings to the vertical state with the swing base, and then moves downward along the second vertical groove to sealingly press into the extraction cavity of the extraction cup to compact the powder, and then the second hydraulic waterway connector is connected to the second hydraulic water flow to inject water into the extraction cavity through the water injection member for extraction.

2. The automatic extraction device according to claim 1, characterized in that The extraction head is fixedly provided with a sealing plug at the end of the hydraulic cavity away from the swing base, and the water injection member is fixedly embedded in the end of the sealing plug away from the swing base, and the water injection member is further provided with a filter screen.

3. The automatic extraction device according to claim 2, characterized in that The water injection member is a shower-type water distribution disc.

4. The automatic extraction device according to claim 1, characterized in that The outer periphery of the piston is provided with a piston sealing ring sealingly sliding with the hydraulic cavity, and the end of the extraction head away from the swing base is provided with an extraction sealing ring sealingly sliding with the extraction cavity.

5. The automatic extraction device according to claim 1, characterized in that The upper part of the support is provided with a rotating shaft, and the swing base is rotatably mounted on the rotating shaft.

6. The automatic extraction device of claim 1, wherein, One side of the support in the swing direction of the swing base is provided above the extraction cavity of the extraction cup with a powder guide assembly for receiving powder, the powder guide assembly having an inclined powder guide channel for guiding the received powder into the extraction cavity; the extraction head avoids the powder guide channel during the process of moving downward from the initial inclined state and swinging to the vertical state.

7. The automatic extraction device according to claim 6, characterized in that The swing base is further provided with a baffle opening and closing the upper end of the powder guide channel with the rotation of the swing base.

8. The automatic extraction device according to claim 7, characterized in that The baffle has a first plate fixed to the side opposite to the powder guide channel of the swing seat and extending along the extension direction of the hydraulic cavity, and a second plate extending obliquely from the lower end of the first plate towards the powder guide channel, when the swing seat swings towards the side where the powder guide assembly is located, the second plate is inserted into the upper end of the powder guide channel to close the powder guide channel, and when the swing seat swings back to the original position, the second plate is driven away from the powder guide channel to open the powder guide channel.

9. The automatic extraction device according to claim 6, characterized in that The outer side of the powder guide channel is also provided with a vibration self-cleaning assembly.

10. A coffee maker comprising a grinding device, an extraction device interfacing with the grinding device, and a first hydraulic waterway and a second hydraulic waterway connected with the extraction device, characterized in that, The extraction device is the automatic extraction device according to any one of claims 1-9, and the first hydraulic waterway joint and the second hydraulic waterway joint of the automatic extraction device are connected with the first hydraulic waterway and the second hydraulic waterway respectively.

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