Coffee machine bean grinding automatic powder pressing mechanism

Abstract

The present invention relates to an automatic powder pressing mechanism for coffee machine bean grinding, which is designed to solve the technical problem that the structure design of the bean grinding and powder pressing combination of existing similar products is not good, especially the structure design of the powder pressing combination is not good. The mechanism includes a bean grinding combination, a powder pressing combination, and a coffee funnel combination. The key points of its structural design are that the powder pressing combination is arranged at the top seat opening of the funnel seat of the coffee funnel combination, a powder pressing hammer is arranged at the bottom of the valve body of the powder pressing combination, the powder pressing hammer is sealed and connected with the valve body as a whole, one end of the valve body at the connection is inserted into the valve seat, the spring columns at the four end corners of the top of the valve seat are respectively provided with springs, the liquid inlet on one side of the valve body is provided with a valve head, the inner cavity groove at the top of the other end of the valve body is provided with a piston sleeve inserted and sealed in the valve body and moving up and down, the top of the piston sleeve is inserted into the piston cover, the outer diameter of the top of the piston sleeve where the piston sleeve and the piston cover are sleeved is provided with a piston ring, the piston ring and the piston sleeve form a piston assembly, and the piston sleeve drives the valve body and the powder pressing hammer to move up and down with the change of the hydraulic pressure in the cavity.

Description

Technical Field

[0001] The invention relates to a bean grinding and powder pressing structure of a coffee machine, which is an automatic bean grinding and powder pressing mechanism for a coffee machine. Background Art

[0002] At present, in the field of coffee machines, especially in the field of bean-grinding Italian coffee machines, manual powder pressing is required after grinding. The powder is pressed manually with a powder hammer to ensure that the coffee powder can form a solid powder cake state, which is conducive to better coffee extraction. Most traditional coffee machines are manually or motor-driven, and the motor and manual are based on fixed limit and fixed stroke modes. As disclosed in the Chinese patent literature, the application number is 201710720241.7, the application publication date is 2017.11.07, and the invention name is "A portable Italian coffee machine with grinding function"; the Italian coffee machine combines the functions of coffee bean grinding and coffee powder extraction. When grinding, the grinding assembly is installed inside the cylinder, and the upper end of the rotating shaft of the grinding assembly is connected to the piston of the screw assembly through a connecting structure; when extracting, the grinding assembly is removed from the inside of the cylinder. Another example is the application number 201810757963.4 disclosed in the Chinese patent literature, the application publication date is 2018.10.19, and the invention name is "A coffee machine"; the coffee machine includes a body, a mobile device, a hydraulic device and a brewing device, the brewing device includes a brewing chamber, a first piston and a first piston rod, the brewing chamber is connected to the mobile device, the brewing chamber has a first position and a second position, the brewing chamber includes an open first end, a second end with a first piston rod opening, and a powder loading port on the chamber between the first end and the second end; in the first position, the first piston is located between the second end of the brewing chamber and the powder loading port, so that coffee powder can be loaded between the first piston and the hydraulic device; in the second position, the first piston is located at the first end of the brewing chamber to push the brewed coffee powder out of the first end of the brewing chamber. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a coffee machine that grinds beans and automatically presses powder for grinding, espresso and American coffee to the art, so as to solve the technical problems of poor design of the combination structure of grinding beans and pressing powder of existing similar products, especially poor design of the combination structure of pressing powder. The purpose is achieved through the following technical solutions.

[0004] A coffee machine automatic powder pressing mechanism for grinding beans, the mechanism includes a bean grinding assembly, a powder pressing assembly, and a coffee funnel assembly. A powder conduit on one side of a cup seat of the bean grinding assembly is connected to a powder inlet on one side of a top seat opening of a funnel seat of the coffee funnel assembly. The bottom of the funnel seat is connected to an extraction funnel. An extraction net is provided in the extraction funnel. A first operating handle is provided on one side of the extraction funnel. An extraction coffee nozzle is provided at the bottom of the extraction funnel. The key points of its structural design are that the powder pressing assembly is arranged at the top seat opening of the funnel seat of the coffee funnel assembly, a powder pressing hammer is provided at the bottom of the valve body of the powder pressing assembly, the powder pressing hammer is sealed and connected to the valve body as a whole, one end of the valve body at the connection is inserted into the valve seat, the spring columns at the four end corners of the top of the valve seat are respectively provided with springs, the spring columns of the valve seat respectively extend out of the side grooves at the four end corners of the valve body, a valve head is provided at the liquid inlet on one side of the valve body, and the inner cavity groove at the top of the other end of the valve body is provided with a piston sleeve that is inserted and sealed in the valve body and moves up and down, and the top of the piston sleeve The piston sleeve is inserted into the piston cover, and a piston ring is provided on the outer diameter of the top of the piston sleeve where the piston sleeve and the piston cover are sleeved. The outer diameter of the piston ring is sealed against the inner diameter of the piston cover. The piston ring and the piston sleeve form a piston assembly. The piston sleeve and the piston cover are fixed to the bottom of the valve seat through the valve frame on the top and outer diameter of the piston cover. The water inlet of the valve head is connected to the water inlet joint of the water tank through the second three-way solenoid valve, the water pump, the water inlet valve, and the water tank. The piston sleeve drives the valve body and the powder hammer to move up and down with the change of the hydraulic pressure in the cavity. The second three-way solenoid valve is provided with a pressure relief hole. Therefore, the mechanism adopts the hydraulic drive structure design of the powder pressing combination. Since the cross-sectional area of ​​the hydraulic piston is fixed and the water pressure is constant, the pressure in the funnel seat is constant regardless of the amount of powder, ensuring that the extraction pressure is constant each time and the quality of the brewed coffee is stable.

[0005] A side liquid hole is provided on one side of the liquid inlet of the valve body, one end of which is sealed in the valve head, and the other end of which is communicated with the piston sleeve of the valve body; the outer diameter of the top of the powder hammer is buckled and fixed to the valve body, while the center column of the top of the powder hammer is buckled and fixed to the center hole of the valve body, and the positioning column on one side of the center column of the powder hammer is inserted into the positioning hole at the bottom of the valve body, and the above connection is sealed. The side liquid hole of the valve body cooperates with the valve needle to further facilitate the return water state pressure stabilization in the piston assembly.

[0006] The side liquid hole of the valve body extends into the piston sleeve and is provided with a side liquid column, and the inner cavity groove of the valve body on the other side of the side liquid column is provided with a high rib column higher than the side liquid column, and the side liquid column and the high rib column of the valve body are respectively inserted into the side column hole and the rib column hole in the piston sleeve. The above structure further improves the up and down movement between the piston sleeve and the valve body, and plays a guiding role.

[0007] The top of the piston cover is provided with a raised annular sleeve opening, and the inner sleeve opening with a raised inner diameter of the annular sleeve opening is inserted into the sleeve hole extending out of the top of the valve frame, and the valve frame is fixed to the bottom two sides of the valve seat through the inner buckle edges of the side plate ends symmetrically arranged on both sides. The above structure facilitates the fixing of the piston cover to the valve frame, and the assembly and fixing between the valve frame and the valve seat.

[0008] The powder hammer increases in size from one side of the valve body at the top to the other side at the bottom to form a conical shape. The above is an embodiment of the shape of a powder hammer.

[0009] The bean grinding assembly has a stirring head at the top center of one side of the cup seat, and a motor is provided at the bottom center of the other side of the cup seat. The motor shaft of the motor is connected to the stirring head through a gear assembly, and the stirring head is connected to the grinding disc in the grinding cup. The grinding cup is fixed to the cup seat through a connecting piece at the top of the machine body, and a cup cover is provided on the top of the grinding cup. The above is an embodiment of the bean grinding assembly being provided in a coffee machine.

[0010] A cup holder mesh is provided in the C-shaped notch of the machine body, the opening width of the cup holder mesh is greater than the distance from the extraction coffee nozzle to the inner side of the C-shaped notch, the cup holder mesh is opened for use or folded inside the C-shaped notch through a hinge seat, and the hinge seat is fixedly arranged on the inner shell of the C-shaped notch of the machine body. The above structure facilitates the use of a lower coffee cup in the coffee machine, and the lower coffee cup is placed on the opened cup holder mesh to receive the ground coffee or other coffee made by other methods.

[0011] The bean grinding and powder pressing combination composed of the bean grinding combination, the powder pressing combination and the coffee funnel combination is arranged on one side of the machine body, and the other side of the machine body is provided with an espresso coffee extraction chamber combination, the bottom of the espresso coffee funnel of the espresso coffee extraction chamber combination is provided with an espresso coffee nozzle, and one side of the espresso coffee funnel of the espresso coffee extraction chamber combination is provided with a second operating handle, and an American coffee chamber combination is arranged in the machine body, and the American coffee chamber combination and the espresso coffee extraction chamber combination are connected to the boiler in the machine body through a first three-way solenoid valve, and the boiler is connected to the second three-way solenoid valve through a pipeline, and the American coffee chamber combination is connected to the American coffee nozzle through a pipeline. The above is an embodiment of the coffee machine structure integrating grinding, espresso and American coffee.

[0012] A hot water pipe is provided on one side of the extraction coffee mouth of the machine body, a water diversion plate is provided in front of the extraction coffee mouth of the coffee funnel combination and the espresso mouth of the espresso extraction chamber combination, a water tank is provided on the machine body at the rear of the C-shaped notch, a water pipe interface is provided on one side of the water tank, a water tank cover is provided at the box mouth of the water tank, a drain plate is provided at the bottom of the C-shaped notch of the machine body, a control panel is provided above the C-shaped notch of the machine body, the control panel is provided with control buttons and a temperature meter, and a control knob is provided on the machine body on one side of the control panel. The above are the specific structural positions of the hot water pipe, water tank, control panel and other components.

[0013] The invention has reasonable structural design, convenient production and assembly, small volume, constant liquid pressure, good night pressing effect and wide application range; it is suitable for use as an automatic powder pressing mechanism for coffee bean grinding machines, as well as structural improvement of water channels in similar small household appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the pressed powder combination.

[0016] Figure 3 yes Figure 2 Schematic diagram of the explosion structure of the pressed powder combination, in which the framed part is the bottom structure of the piston sleeve and the valve seat.

[0017] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure.

[0018] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure in the explosion state.

[0019] Figure 6 yes Figure 5 Schematic diagram of the explosion structure.

[0020] Figure 7 It is a schematic cross-sectional structural diagram of an embodiment of the present invention.

[0021] Figure 8 yes Figure 7 Schematic diagram of the three-dimensional structure, in which the dotted line is the body structure.

[0022] Fig. 9 It is a structural schematic diagram of the water channel connection state of the whole machine of the present invention.

[0023] Serial numbers and names of the accompanying drawings: 1. Bean grinding assembly, 101. Grinding cup, 102. Connecting piece, 103. Cup holder, 104. Motor, 2. Powder pressing assembly, 201. Powder pressing hammer, 202. Valve seat, 203. Spring, 204. Valve head, 205. Valve body, 206. Piston sleeve, 207. Piston ring, 208. Piston cover, 209. Valve rack, 210. Water inlet, 3. Coffee funnel assembly, 301. Funnel seat, 302. Extraction net, 303. Extraction funnel, 4. Italian coffee extraction chamber assembly, 5. American coffee chamber assembly, 6. Water tank, 7. Machine body, 8. Water pump, 9. Cup holder mesh plate, 10. American coffee nozzle, 11. First three-way solenoid valve, 12. Boiler, 13. Second three-way solenoid valve, 14. Water inlet valve, 15. Water inlet connector. DETAILED DESCRIPTION

[0024] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 9As shown, the mechanism includes a bean grinding assembly 1, a powder pressing assembly 2, and a coffee funnel assembly 3. The powder pipeline on one side of the cup seat 103 of the bean grinding assembly is connected to the powder inlet on one side of the top seat opening of the funnel seat 301 of the coffee funnel assembly. The bottom of the funnel seat is connected to the extraction funnel 303. An extraction net 302 is provided in the extraction funnel. A first operating handle is provided on one side of the extraction funnel. An extraction coffee nozzle is provided at the bottom of the extraction funnel. The powder pressing assembly is arranged at the top seat opening of the funnel seat of the coffee funnel assembly. A powder pressing hammer 201 is provided at the bottom of the valve body 205 of the powder pressing assembly. The powder pressing hammer is sealed and connected to the valve body as a whole. One end of the valve body at the connection is inserted into the valve seat 202. The spring columns at the four end corners of the top of the valve seat are respectively provided with springs 203. The spring columns of the valve seat extend out of the side grooves at the four end corners of the valve body. A valve head 210 is provided at the liquid inlet on one side of the valve body. The inner cavity groove at the top of the other end of the valve body is provided with a piston sleeve 206 that is inserted and sealed in the valve body and moves up and down. The top of the piston sleeve is inserted into the piston cover In 208, a piston ring 207 is provided on the outer diameter of the top of the piston sleeve where the piston sleeve and the piston cover are sleeved. The outer diameter of the piston ring is sealed against the inner diameter of the piston cover. The piston ring and the piston sleeve form a piston assembly. The piston sleeve and the piston cover are fixed to the bottom of the valve seat through a valve rack 209 on the top and outer diameter of the piston cover. The water inlet 210 of the valve head is connected to the water inlet joint 15 of the water tank 6 through the second three-way solenoid valve 13, the water pump 8, the water inlet valve 14, and the piston sleeve drives the valve body and the powder hammer to move up and down with the change of the hydraulic pressure in the cavity. The second three-way solenoid valve is provided with a pressure relief hole.

[0025] A side liquid hole is provided on one side of the liquid inlet of the valve body, one end of the side liquid hole is sealed in the valve head, and the other end of the side liquid hole is communicated with the piston sleeve of the valve body; while the outer diameter of the top of the powder hammer is buckled and fixed to the valve body, the center column at the top of the powder hammer is buckled and fixed to the center hole of the valve body, and the positioning column on one side of the center column of the powder hammer is inserted into the positioning hole at the bottom of the valve body, and the above-mentioned connection is sealed with a ring. The side liquid hole of the valve body extends into the piston sleeve and is provided with a side liquid column. The inner groove of the valve body on the other side of the side liquid column is provided with a high rib column higher than the side liquid column. The side liquid column and the high rib column of the valve body are respectively inserted into the side column hole and the rib column hole in the piston sleeve. A raised annular sleeve opening is provided on the top of the piston cover, and the inner sleeve opening with a raised inner diameter of the annular sleeve opening is inserted into the sleeve hole extending out of the top of the valve frame. The valve frame is fixed to the bottom two sides of the valve seat through the inner buckle edges of the side plate ends symmetrically arranged on both sides. The powder hammer increases from one side of the valve body at the top to the other side of the bottom and is conical.

[0026] A stirring head is provided at the top center of one side of the cup holder of the above-mentioned grinding bean assembly, and a motor 104 is provided at the bottom center of the other side of the cup holder. The motor shaft of the motor is connected to the stirring head through a gear assembly, and the stirring head is connected to the grinding disc in the grinding cup 101. The grinding cup is fixed to the cup holder through a connector 102 at the top of the machine body 7, and a cup cover is provided on the top of the grinding cup. A cup holder mesh plate 9 is provided in the C-shaped notch of the machine body, and the opening width of the cup holder mesh plate is greater than the distance from the extraction coffee nozzle to the inner side of the C-shaped notch. The cup holder mesh plate is opened for use or folded inside the C-shaped notch through a hinge seat, and the hinge seat is fixedly provided on the inner shell of the C-shaped notch of the machine body. A bean grinding and powder pressing combination consisting of a bean grinding combination, a powder pressing combination and a coffee funnel combination is arranged on one side of the machine body, and an espresso coffee extraction chamber combination 4 is provided on the other side of the machine body. An espresso coffee nozzle is provided at the bottom of the espresso coffee funnel of the espresso coffee extraction chamber combination, and a second operating handle is provided on one side of the espresso coffee funnel of the espresso coffee extraction chamber combination. An American coffee chamber combination 5 is provided in the machine body. The American coffee chamber combination and the espresso coffee extraction chamber combination are connected to a boiler 12 in the machine body through a first three-way solenoid valve 11, the boiler is connected to the second three-way solenoid valve through a pipeline, and the American coffee chamber combination is connected to an American coffee nozzle 10 through a pipeline. A hot water pipe is provided on one side of the coffee extraction nozzle of the machine body, water diversion plates are provided in front of the coffee extraction nozzle of the coffee funnel combination and the espresso nozzle of the espresso extraction chamber combination respectively, a water tank is arranged on the machine body at the rear part of the C-shaped groove, a water pipe interface is provided on one side of the water tank, a water tank cover is provided on the box mouth of the water tank, a drain plate is provided on the bottom of the C-shaped groove of the machine body, a control panel is provided above the C-shaped groove of the machine body, the control panel is provided with control buttons and a temperature meter, and a control knob is provided on the machine body on one side of the control panel.

[0027] The bean grinding assembly of the mechanism enters the coffee funnel assembly after grinding the powder. After the specified time of grinding is completed, the powder pressing assembly is used to compact the fluffy coffee powder. The specific steps of the above process are as follows: 1) Coffee bean grinding stage: The granular coffee beans are crushed by the grinding disc in the grinding cup of the bean grinding assembly, and enter the extraction funnel of the coffee funnel assembly through the powder channel to complete the grinding action. At this time, the hydraulic powder hammer is in the initial state and the powder pressing hammer is in the uppermost state. 2) Powder pressing action stage: When the motor stops running, water is pressed into the powder pressing assembly through the water pump by program control, and the water pressure in the piston sleeve of the powder pressing assembly pushes the valve body and the powder pressing hammer downward to realize the powder pressing action. That is, under the pressure of the water pump, the water pressure in the piston sleeve drives the powder pressing hammer to move vertically downward, compacting the fluffy coffee powder in the extraction funnel, truly simulating the manual powder pressing action, and completing the entire action. 3) Pressure relief stage after extraction: The second three-way solenoid valve continues to provide relatively stable pressure. After a cup of fragrant coffee is extracted, the second three-way solenoid valve is powered off, and the water circuit switches to the drain port of the coffee machine water circuit mechanism for pressure relief operation, and the pressure relief hole of the second three-way solenoid valve opens. The above means that the process of grinding → filling → pressing of a cup of coffee is completed.

[0028] The specific steps of the piston movement in the above-mentioned powder pressing assembly are as follows: 1) Under the pressure of the water pump, water enters the entire mechanism from the water inlet of the valve head on one side of the valve body; 2) Water fills the entire piston sleeve and drives the piston assembly to move into the up and down movement space in the piston cover. When the water pressure overcomes the spring, that is, the water pressure is greater than the return force of the spring, the piston assembly moves downward to drive the powder pressing hammer of the valve body to perform the powder pressing action; 3) After the powder pressing action is completed, the water pump stops working, and the second three-way solenoid valve of the water channel mechanism of the coffee machine performs a pressure relief action. Under the elastic force of the spring, the piston assembly resets upward and ensures that the entire powder pressing system returns to its position.

[0029] In summary, the mechanism includes three combined action principles and forms of bean grinding combination, powder pressing combination and coffee funnel combination, which are applied to coffee machines with grinding requirements, or coffee machines integrating grinding, Italian and American coffee. Although existing similar products have realized the action of pressing powder through motors, connecting rods, etc., it should be emphasized that: through the hydraulic piston combination control under different powder amounts, a fixed (pressing pressure = water pressure × piston cross-sectional area, piston cross-sectional area is constant, water pressure is constant at a fixed value, so the pressing pressure is constant) pressing force is achieved (good coffee making requires reasonable force to compact the powder cake in order to form sufficient resistance for coffee extraction); this is an obvious advantage, and other such as connecting rod motors need to be fixed in position to press the powder, but there will be a problem that when there is more coffee powder, it is pressed very tightly, and when there is less coffee powder, it is not pressed in place, and the action of pressing the powder cake cannot be stable, so a good cup of coffee cannot be brewed.

Claims

1. A coffee bean grinding and automatic powder pressing mechanism for a coffee machine, the mechanism comprising a coffee bean grinding assembly (1), a powder pressing assembly (2), and a coffee funnel assembly (3), wherein a powder conduit on one side of a cup seat (103) of the coffee bean grinding assembly is connected to a powder inlet on one side of a top seat opening of a funnel seat (301) of the coffee funnel assembly, the bottom of the funnel seat is connected to an extraction funnel (303), an extraction net (302) is provided in the extraction funnel, a first operating handle is provided on one side of the extraction funnel, and an extraction coffee nozzle is provided at the bottom of the extraction funnel; characterized in that The powder pressing assembly (2) is arranged at the top seat opening of the funnel seat (301) of the coffee funnel assembly (3); a powder pressing hammer (201) is arranged at the bottom of the valve body (205) of the powder pressing assembly; the powder pressing hammer is sealed and connected to the valve body as a whole; one end of the valve body at the connection is inserted into the valve seat (202); spring columns at the four end corners of the valve seat are respectively provided with springs (203); the spring columns of the valve seat extend out of the side grooves at the four end corners of the valve body; a valve head (204) is arranged at the liquid inlet on one side of the valve body; an inner cavity groove at the top of the other end of the valve body is provided with a piston sleeve (206) which is inserted into and sealed in the valve body and moves up and down; the top of the piston sleeve is sleeved The piston sleeve is inserted into the piston cover (208); a piston ring (207) is provided on the outer diameter of the top of the piston sleeve where the piston sleeve and the piston cover are sleeved; the outer diameter of the piston ring is sealed against the inner diameter of the piston cover; the piston ring and the piston sleeve form a piston assembly; the piston sleeve and the piston cover are fixed to the bottom of the valve seat through a valve frame (209) on the top and outer diameter of the piston cover; the water inlet (210) of the valve head is connected to the water inlet joint (15) of the water tank (6) through a second three-way solenoid valve (13), a water pump (8), and a water inlet valve (14); the piston sleeve drives the valve body and the powder hammer to move up and down as the hydraulic pressure in the cavity changes; and the second three-way solenoid valve is provided with a pressure relief hole.

2. The automatic coffee bean grinding and powder pressing mechanism of claim 1, characterized in that A side liquid hole is provided on one side of the liquid inlet of the valve body (205), one end of the side liquid hole is sealed in the valve head (204), and the other end of the side liquid hole is communicated with the piston sleeve (206) of the valve body; the outer diameter of the top of the powder hammer (201) is buckled and fixed to the valve body, while the center column at the top of the powder hammer is buckled and fixed to the center hole of the valve body, and a positioning column on one side of the center column of the powder hammer is inserted into the positioning hole at the bottom of the valve body, and the above-mentioned connections are respectively provided with sealing rings.

3. The automatic coffee bean grinding and powder pressing mechanism of claim 2, characterized in that The side liquid hole of the valve body (205) extends into the piston sleeve (206) and is provided with a side liquid column, and the inner cavity groove of the valve body on the other side of the side liquid column is provided with a high rib column higher than the side liquid column, and the side liquid column and the high rib column of the valve body are respectively inserted into the side column hole and the rib column hole in the piston sleeve.

4. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 1, characterized in that The piston cover (208) has a raised annular sleeve opening at the top, and an inner sleeve opening with a raised inner diameter is inserted into a sleeve hole extending out of the top of the valve frame (209). The valve frame is fixed to the bottom sides of the valve seat (202) by inner buckled edges of the side plate ends symmetrically arranged on both sides.

5. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 1, characterized in that The powder compacting hammer (201) increases in size from one side of the valve body (205) at the top to the other side at the bottom and is in a conical shape.

6. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 1, characterized in that A stirring head is provided at the top center of one side of the cup seat (103) of the bean grinding assembly (1), and a motor (104) is provided at the bottom center of the other side of the cup seat. The motor shaft of the motor is connected to the stirring head via a gear assembly, and the stirring head is connected to a grinding disc in a grinding cup (101). The grinding cup is fixed to the cup seat via a connecting piece (102) at the top of the machine body (7), and a cup cover is provided on the top of the grinding cup.

7. The automatic coffee bean grinding and powder pressing mechanism of claim 6, characterized in that A cup holder mesh plate (9) is provided in the C-shaped notch of the machine body (7); the opening width of the cup holder mesh plate is greater than the distance from the coffee extraction nozzle to the inner side of the C-shaped notch; the cup holder mesh plate is opened for use or folded inside the C-shaped notch via a hinge seat; the hinge seat is fixedly arranged on the inner shell of the C-shaped notch of the machine body.

8. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 6, characterized in that The bean grinding and powder pressing assembly, which is composed of the bean grinding assembly (1), the powder pressing assembly (2), and the coffee funnel assembly (3), is arranged on one side of the machine body (7); an espresso coffee extraction chamber assembly (4) is arranged on the other side of the machine body; an espresso coffee spout is arranged at the bottom of the espresso coffee spout of the espresso coffee extraction chamber assembly; a second operating handle is arranged on one side of the espresso coffee spout of the espresso coffee extraction chamber assembly; an American coffee chamber assembly (5) is arranged in the machine body; the American coffee chamber assembly and the espresso coffee extraction chamber assembly are connected to a boiler (12) in the machine body via a first three-way solenoid valve (11); the boiler is connected to a second three-way solenoid valve (13) via a pipeline; and the American coffee chamber assembly is connected to an American coffee spout (10) via a pipeline.

9. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 8, characterized in that A hot water pipe is provided on one side of the coffee extraction nozzle of the machine body (7); water diversion guide plates are provided in front of the coffee extraction nozzle of the coffee funnel assembly (3) and the espresso nozzle of the espresso extraction chamber assembly (4); a water tank (6) is arranged on the machine body at the rear of the C-shaped notch; a water pipe interface is provided on one side of the water tank; a water tank cover is provided at the box opening of the water tank; a drain plate is provided at the bottom of the C-shaped notch of the machine body; a control panel is provided above the C-shaped notch of the machine body; the control panel is provided with control buttons and a temperature meter; and a control knob is provided on the machine body on one side of the control panel.

10. The automatic bean grinding and powder pressing mechanism of a coffee machine according to claim 1, characterized in that The specific steps of the piston movement in the powder pressing assembly (2) are as follows: 1) under the pressure of the water pump (8), water enters the entire mechanism from the water inlet (210) of the valve head (204) on one side of the valve body (205); 2) the water fills the entire piston sleeve (206) and drives the piston assembly to move into the up and down movement space in the piston cover (208); when the water pressure overcomes the spring (203), that is, the water pressure is greater than the return force of the spring, the piston assembly moves downward and drives the powder pressing hammer (201) of the valve body to perform a powder pressing action; 3) after the powder pressing action is completed, the water pump stops working, the second three-way solenoid valve (13) of the water path mechanism of the coffee machine performs a pressure relief action, and the piston assembly, under the elastic force of the spring, returns to its original position upward to ensure that the entire powder pressing system returns to its original position.

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