Large dose coffee machine automatic extraction brewer

Abstract

The present application relates to a kind of large dose coffee machine automatic extraction brewing type brewer, it is for solving the brewing structure design of the brewing of similar coffee machine product of existing kind, it leads to production assembly is more inconvenient, less to adopt liquid pressure one-way powder pressing, brewing cavity capacity is smaller, coffee brewing mode is more single technical problem and design.The gist is that the hydraulic combination of the brewer is fixed in screw rod, the outer thread of the outer diameter of screw rod is engaged with the inner thread of the inner diameter of bevel gear, at least one side of bevel gear outer diameter extends the outer gear ring of hydraulic combination and the pinion of the motor shaft of second motor is engaged, the sealing seat in hydraulic combination is provided with liquid outlet passage, and the top of the liquid outlet passage of sealing seat is provided with hydraulic connection hole;Top dross push rod is arranged in the end corner groove of the main body below brewing cavity, and the push rod head of one end of top dross push rod extends into powder pressing combination, and is inserted into the rod hole of the end rod part of the brewing cavity push rod one end rod part that extends out in brewing cavity bottom in powder pressing combination, and the outer diameter of this end rod part is provided with the push rod spring.

Description

Technical Field

[0001] This invention relates to a brewing device for coffee machines, specifically an automatic extraction and brewing brewing device for high-volume coffee machines. Background Technology

[0002] A coffee machine is a household or commercial appliance that automatically makes coffee, integrating the entire process of grinding, tamping, filling, brewing, and removing residue. Some existing coffee makers with grinding and pressure functions include brewing components. The core component of these brewing machines is the brewing structure used for receiving, tamping, brewing, and removing residue. Examples include Chinese patent application number 202020831309.6, authorized on April 23, 2021, entitled "A Brewing System for a Coffee Machine"; another example is Chinese patent application number 202211054805.5, published on November 22, 2022, entitled "Coffee Machine Brewing Unit and Brewing Method"; and yet another example is Chinese patent application number 202310090180.6, published on April 14, 2023, entitled "Coffee Machine Tamping Method and Brewing Unit". However, the aforementioned products and similar automated coffee machines lack a support structure at the bottom of the brewing chamber, resulting in relatively fixed gear meshing and motor mounting positions, making production and assembly inconvenient. The maximum input weight for these products is 14-16 grams, allowing only small-volume beverages and making it difficult to provide larger volumes through multiple consecutive brews, thus limiting the capacity for a single brewing cycle. They also struggle to simultaneously offer both Americano and espresso brewing options. Furthermore, these products typically utilize a bidirectional pushing mechanism—a pusher and tamper within the brewing chamber, along with an external sector gear—resulting in a relatively small coffee powder capacity within the brewing chamber, and rarely employing a unidirectional hydraulic tamping method. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a high-dose automatic extraction and brewing brewer for coffee machines, thereby solving the technical problems of existing coffee machine products, such as poor brewer structure design leading to inconvenient production and assembly, limited use of unidirectional compression, small brewing chamber capacity, and a relatively simple coffee brewing method. This objective is achieved through the following technical solution.

[0004] An automatic extraction and brewing brewer for high-dose coffee machines includes a coffee maker housing a tamping assembly that reciprocates via a first motor on one side of the housing's outer diameter. The tamping assembly's brewing chamber contains a brewing chamber pusher that moves vertically. When the top opening of the tamping chamber rotates to a vertical powder inlet on one side of the housing's top, coffee powder falls into the tamping chamber. When the top opening of the tamping chamber rotates to an inclined hydraulic assembly on the other side of the housing's top, the coffee powder within the tamping chamber is propelled by the hydraulic assembly into the brewing chamber. While the coffee grounds are being pressed into a coffee cake within the brewing chamber, hot water from the boiler passes through the brewing chamber of the press assembly and flows out of the press assembly. A chaff discharge hole is located on one side of the lower housing of the hydraulic assembly. During the process of the press assembly resetting to the coffee inlet side, the hydraulic assembly disengages from the brewing chamber of the press assembly. The coffee cake is then reset by a push rod spring within the brewing chamber, and is pushed out of the discharge hole of the housing by the push rod of the brewing chamber. The hydraulic assembly is characterized by being fixedly installed inside a screw, with the external thread of the screw's outer diameter meshing with the internal thread of the helical gear's inner diameter, and at least one side of the helical gear's outer diameter extending outwards. The external gear ring of the hydraulic assembly meshes with the pinion at the motor shaft of the second motor. The sealing seat within the hydraulic assembly has a liquid outlet channel, and the top of the liquid outlet channel has a hydraulic connection hole. Symmetrically protruding swing shaft columns are provided on both sides of the outer diameter of the main body below the brewing chamber of the powder pressing assembly. These swing shaft columns are fastened and fixed to the shaft fastening grooves on both sides of one end of the brewing support at the bottom of the powder pressing assembly inside the housing. The swing shaft of the first motor is connected to the shaft hole on one side of the shaft fastening groove of the brewing support through the housing. Symmetrically protruding shaft pins are provided on the inner side of the other end of the brewing support, and these shaft pins are inserted into the powder pressing assembly. The combined brewing chamber has symmetrical pin holes on both sides of its outer diameter below. The powder pressing assembly and the brewing support are integrated and rotated directionally by the swing shaft of the first motor. A top slag pusher is provided in the corner groove of the main body below the brewing chamber of the powder pressing assembly on one side of the pin. The shaft of the top slag pusher is fastened and fixed to the corner groove of the powder pressing assembly and swings. The pusher head of one end of the top slag pusher extends into the powder pressing assembly and is inserted into the rod hole at the end of the rod of the brewing chamber pusher that extends out from the bottom of the brewing chamber inside the powder pressing assembly. The outer diameter of the rod at the bottom of the brewing chamber pusher inside the brewing chamber is provided with the pusher spring. The above is a specific embodiment of the powder pressing assembly structure. The powder pressing head in the powder pressing assembly can also be a sealed powder pressing plug and an internal spring. The liquid outlet channel is set in the sealed powder pressing plug, so that liquid can pass through while the powder is being pressed. The brewing support and the powder pressing assembly can also be integrally formed and equipped with a swing shaft to allow the first motor to drive the powder pressing assembly to rotate directionally back and forth in the housing. The top slag pusher can push the brewing chamber pusher up and down when the powder pressing assembly rotates directionally back and forth to press the powder into powder cakes and push out the powder cakes to discharge the slag. The shaft hole of the brewing support is a spline hole or a flat key hole.

[0005] The brewing chamber of the tamping assembly has an inner diameter of 52.0 mm, a maximum capacity of 39.0 grams of coffee powder, a free height of 62.0 mm, a minimum height after compression of 25.0 mm, and a maximum height after compression of 46.0 mm. The height of the top-press pusher is 13.5 mm. Thus, the inner diameter of the brewing chamber is increased from the existing 39 mm to 52 mm. According to Pascal's law F=P×S, a larger cross-sectional area requires greater force, further testing the structural reliability of the entire mechanism.

[0006] The hydraulic assembly is square in shape, with helical gears extending from its four end faces. This allows for more flexible and convenient installation of the second motor and its corresponding pinion according to the internal space design requirements of the coffee machine.

[0007] The housing includes a first housing and a second housing on both sides of the tamping assembly, a hydraulic housing with an outer diameter of the hydraulic assembly, and a powder receiving cover at the powder inlet. The powder inlet is located within the powder receiving cover, and the powder receiving cover with an outer diameter of the powder inlet is fastened and fixed to the first housing and the second housing on one side above the top cavity opening of the brewing chamber when the tamping assembly is in a vertical state. When the first housing, the second housing, and the powder receiving cover are integrally placed into the brewing tank on one side of the coffee machine, the T-shaped heads at the top of the obliquely protruding ports of the first housing and the second housing are embedded and fixed into the T-shaped holes at the bottom opening of the hydraulic housing inside the coffee machine. The hydraulic assembly, helical gear, and screw are disposed inside the hydraulic housing. Alternatively, the first housing, the second housing, the powder receiving cover, and the hydraulic housing are connected as a whole to form the housing, and the housing is inserted into the brewing tank on one side of the coffee machine as a whole. This satisfies the requirements for docking of the liquid outlet channel within the tamping assembly and meshing of the helical gear when the housing is inserted as a whole.

[0008] The bottom opening of the receiving hood above the top opening of the brewing chamber in the tamping assembly is equipped with a scraper. The holes of the scraper are aligned with the receiving holes of the receiving hood. On the side of the tamping assembly in the direction of rotation, the bottom of the scraper has a raised scraping edge. This scraping edge extends above the bottom opening of the receiving hood while simultaneously abutting against the top opening of the brewing chamber within the tamping assembly. This structure facilitates the scraping of coffee grounds protruding above the brewing chamber.

[0009] The outer diameter of the brewing chamber of the coffee grounds assembly below the scraping edge of the scraper is provided with a slanted, protruding grounds plate. This structure facilitates the extraction of coffee grounds after brewing, which are then ejected from the brewing chamber and treated as coffee grounds. These grounds are then discharged from the brewer via the grounds plate or collected in a grounds collection box.

[0010] The outer diameter of the casing is provided with protruding American coffee inlets and Italian coffee inlets on both sides. These inlets are connected to the brewing chamber within the main body of the coffee maker assembly and the dual-outlet channel within the hydraulic assembly, respectively. A brewing chamber inlet is located on one side of the bottom of the brewing chamber within the coffee maker assembly. Hot water from the boiler is connected to the brewing chamber inlet via the American coffee inlets, Italian coffee inlets, and a pressure-bearing hose within the casing. These inlets are statically sealed and connected via corresponding pressure-bearing pipes, reducing the risk of wastewater discharge and leakage from the brewing chamber compared to existing quick-connect fittings.

[0011] The other end of the top slag pusher has a limiting shaft protruding outward, and a limiting post is provided in the housing above the limiting shaft; when the coffee powder in the brewing chamber of the pressing assembly is pressed into a coffee cake by the hydraulic assembly, the limiting shaft of the top slag pusher abuts against the limiting post in the housing.

[0012] The top ash pusher and the main body have two ends with swing rods that fit the outer diameter of the brewing support. The swing rods have arc-shaped adjustment holes on the outer shell of the main body. This structure allows for manual adjustment of the top ash pusher by inserting a tool through the adjustment hole, so that the brewing vessel, which is stuck in the pulverizing state, can be reset, and some internal structures can be manually adjusted.

[0013] The outer diameter of the outer casing of the tamping assembly is equipped with a loading / unloading button. The casing is fastened and fixed to the brewer compartment on one side of the coffee machine via the loading / unloading button. This facilitates the removal and cleaning of the brewer via the loading / unloading button, and allows for automatic reset and reinstallation within the coffee machine via the loading / unloading button.

[0014] This invention features a reasonable structural design, a large capacity for coffee powder in the brewing chamber, convenient production, disassembly, and cleaning, good stability after installation, and easy water pipe connection, making it suitable for making Americano and Italian coffee. It is suitable for use as an automatic extraction and brewing brewer for large-volume coffee machines, and for further improvement of similar products. Attached Figure Description

[0015] Figure 1 This is a partial exploded structural diagram of an embodiment of the present invention, with the first motor omitted from the diagram.

[0016] Figure 2 yes Figure 1 A schematic diagram of the assembled three-dimensional structure.

[0017] Figure 3 yes Figure 2 A schematic diagram of the internal structure, with the dashed lines representing a portion of the internal structure.

[0018] Figure 4 yes Figure 2 The diagram shows a cross-sectional view of the coffee. The dotted lines represent the tamping process of coffee powder, and the filling material is the coffee powder.

[0019] Figure 5 yes Figure 2 The diagram shows the other side of the three-dimensional structure, omitting the second motor and pinion.

[0020] Attached Figures and Their Names: 1. Helical Gear, 2. Screw, 3. Hydraulic Housing, 301. T-hole, 4. Hydraulic Assembly, 5. Powder Receiving Cover, 6. First Housing, 601. Limiting Post, 602. Adjusting Hole, 7. Powder Pressing Assembly, 701. Main Body, 7011. Swing Shaft Post, 7012. American Coffee Inlet, 7013. Brewing Chamber Inlet, 702. Top Dregs Push Rod, 7021. Limiting Shaft, 7022. Swing Rod, 7023. Push Rod Head, 703. Brewing Chamber Push Rod, 704. Push Rod Spring, 8. Pressure-bearing Hose, 9. Brewing Support, 901. Shaft Hole, 902. Shaft Pin, 10. Second Housing, 11. Loading / Unloading Button, 12. Powder Scraper. Implementation

[0021] The structure and use of the present invention will now be further described with reference to the accompanying drawings. Figures 1-5As shown, the brewer's shell contains a coffee maker assembly 7 that reciprocates via a first motor on one side of the shell's outer diameter. The main body 701 of the coffee maker assembly contains a brewing chamber pusher 703 that moves up and down. When the top opening of the brewing chamber rotates to the vertical coffee inlet on one side of the shell's top, coffee powder falls into the brewing chamber. When the top opening of the brewing chamber rotates to the inclined hydraulic assembly 4 on the other side of the shell's top, the coffee powder in the brewing chamber is pressed into a coffee cake by the hydraulic assembly, while hot water from the boiler passes through the brewing chamber of the coffee maker assembly and flows out. A slag discharge hole is located on one side of the shell below the hydraulic assembly. During the process of the coffee maker assembly resetting to the coffee inlet side, the hydraulic assembly disengages from the brewing chamber of the coffee maker assembly, and the coffee cake is reset by the pusher spring 704 within the brewing chamber. The coffee cake is then pushed by the brewing chamber pusher and falls out of the shell's discharge hole. The aforementioned hydraulic assembly is fixedly installed inside the screw 2. The external thread of the screw's outer diameter meshes with the internal thread of the helical gear's inner diameter. One side of the helical gear's outer diameter extends out of the hydraulic assembly's outer gear ring and meshes with the pinion at the motor shaft of the second motor. The sealing seat inside the hydraulic assembly has a liquid outlet channel, and the top of the liquid outlet channel of the sealing seat has a hydraulic connection hole. An internal spring is provided between the sealing seat and the sealing powder pressing plug. The outer diameter of the sealing powder pressing plug and the sealing seat is provided with a sealing sleeve, and the bottom end of the sealing powder pressing plug has a sealing ring that fits into the powder pressing assembly. The hydraulic assembly is square, and the helical gears extend out of the four end faces of the hydraulic assembly. The brewing chamber of the powder pressing assembly has symmetrically protruding swing shaft columns 7011 on both sides of the outer diameter of the main body below the chamber. These swing shaft columns are fastened and fixed to the shaft fastening grooves on both sides of one end of the brewing support 9 at the bottom of the powder pressing assembly inside the housing. The swing shaft of the first motor is connected to the shaft hole 901 on one side of the shaft fastening groove of the brewing support through the housing. The other end of the brewing support has symmetrically protruding shaft pins 902 on its inner side. These shaft pins are inserted into the symmetrical pin holes on both sides of the outer diameter of the brewing chamber below the powder pressing assembly. The powder pressing assembly and the brewing support are thus integrated. The first motor's swing shaft rotates directionally back and forth, and the brewing support is triangular. A top slag pusher 702 is provided in the corner groove of the main body below the brewing chamber of the powder pressing assembly on one side of the shaft pin. The shaft of the top slag pusher is fixed to the corner groove of the powder pressing assembly and swings. The pusher head 7023 of one end of the top slag pusher extends into the powder pressing assembly and is inserted into the rod hole at the end of the rod of the brewing chamber pusher that extends out from the bottom of the brewing chamber inside the powder pressing assembly. The outer diameter of the rod at the bottom of the brewing chamber pusher inside the brewing chamber is provided with the pusher spring.

[0022] The brewing chamber of the aforementioned tamping assembly has an inner diameter of 52.0 mm, a maximum capacity of 39.0 grams of coffee powder, a free height of 62.0 mm, a minimum height after compression of 25.0 mm, a maximum height after compression of 46.0 mm, and a top-pressing rod height of 13.5 mm. The housing includes a first housing 6 and a second housing 10 on both sides of the tamping assembly, a hydraulic housing 3 on the outer diameter of the hydraulic assembly, and a powder receiving cover 5 at the powder inlet. The powder inlet is located within the powder receiving cover, and the powder receiving cover on the outer diameter of the powder inlet is fastened and fixed to the first and second housings on one side above the top opening of the brewing chamber in the vertical state of the tamping assembly. When the first housing, the second housing, and the powder receiving cover are integrally placed into the brewing chamber slot on one side of the coffee machine, the T-shaped heads at the top of the obliquely protruding ports of the first and second housings are embedded and fixed to the T-shaped holes 301 at the bottom opening of the hydraulic housing inside the coffee machine. The hydraulic assembly, helical gear, and screw are located inside the hydraulic housing. A scraper 12 is provided at the bottom opening of the receiving hood above the top cavity of the brewing chamber in the powder pressing assembly. The holes of the scraper 12 are aligned with the receiving holes of the receiving hood. A raised scraper edge is provided at the bottom of the scraper 12 on the side of the powder pressing assembly in the direction of rotation. The scraper edge of the scraper 12 is higher than the bottom opening of the receiving hood and abuts against the top cavity of the brewing chamber in the powder pressing assembly. A slanted slag-pouring plate is provided on the outer diameter of the brewing chamber of the powder pressing assembly below the scraper edge of the scraper 12.

[0023] Symmetrically extending American coffee inlets 7012 and Italian coffee inlets are provided on both sides of the outer diameter of the aforementioned shell. These inlets connect to the brewing chamber within the main body of the compressing assembly and the dual-outlet channel within the hydraulic assembly, respectively. A brewing chamber inlet 7013 extends from one side of the bottom of the brewing chamber within the compressing assembly. Hot water from the boiler is connected to the brewing chamber inlet via the American and Italian coffee inlets and the pressure hose 8 within the shell. A limiting shaft 7021 protrudes outward from the other end of the top-press pusher. A limiting post 601 is located within the shell above the limiting shaft. When coffee powder in the brewing chamber of the compressing assembly is pressed into a coffee cake by the hydraulic assembly, the limiting shaft of the top-press pusher abuts against the limiting post within the shell. At the end of the top-press pusher and the main body, two swing rods 7022, fitted to the outer diameter of the brewing support, are provided at their respective ends. The swing rods have arc-shaped adjustment holes 602 on the outer side of the shell corresponding to the main body. The outer diameter of the outer casing of the tamping assembly is provided with a loading and unloading button 11. The casing is fastened and fixed in the brewing tank on the side of the coffee machine by the loading and unloading button.

[0024] The specific operations of the brewing machine in the coffee grounds receiving, tamping, and discharging states are as follows: In the receiving state, after the first motor is powered on, it drives the tamping assembly back to its original position, ensuring the brewing chamber opening is vertically upward. Simultaneously, the brewing chamber pusher, driven downward by the top-crust pusher, creates an open cavity within the brewing chamber, ready to receive coffee grounds. This completes the receiving action. In the tamping state, the first motor, powered on, rotates the tamping assembly to the side of the hydraulic assembly. The hydraulic assembly aligns with the brewing chamber pusher and, driven by the second motor, moves the screw downward to engage. At this point, the liquid injected into the hydraulic assembly is converted into pressure, pushing the coffee grounds into the brewing chamber under pressure. The brewing chamber pusher moves downward under force, forming a coffee cake within the chamber. Then, it waits for hot water from the coffee machine's boiler for coffee extraction and brewing. This completes the tamping and brewing action, and the coffee is discharged through the liquid outlet channel of the hydraulic assembly. In the ash discharge state, the second motor drives the screw and hydraulic assembly to reset simultaneously, while the first motor drives the tamping assembly back to its original position. The brewing chamber push rod in the brewing chamber pushes out the coffee cake, which is blocked by the receiving hood. The pushed-out coffee cake falls out of the shell through the ash discharge plate, completing the ash discharge action.

[0025] In summary, the brewer has external dimensions of 270×90×307mm, features a dual-channel coffee inlet and outlet, and is suitable for brewing Americano and espresso. The brewing chamber automatically adjusts the stroke via a screw and hydraulic system based on the amount of coffee grounds, with a minimum of 12g (espresso) and a maximum of 39g (Americano). The detachable brewing assembly facilitates cleaning; it features hydraulic adaptive tamping of the coffee puck to ensure the quality of every cup; it has an automatic coffee grounds scraper for easy grounds removal; and the coffee grounds are tamped into a puck shape under pressure, reducing the height to 45mm. It uses two sets of motors for faster and more efficient operation.

Claims

1. A high-dose coffee machine automatic extraction and brewing brewer, wherein the brewer's housing is equipped with a tamping assembly (7) that reciprocates via a first motor on one side of the housing's outer diameter; the main body (701) of the tamping assembly has a brewing chamber pusher (703) that moves up and down; when the top opening of the tamping assembly's brewing chamber rotates to a vertical powder receiving port on one side of the housing's top, coffee powder falls into the tamping assembly's brewing chamber; when the top opening of the tamping assembly's brewing chamber rotates to an inclined liquid receiving port on the other side of the housing's top... When the pressing assembly (4) is in operation, the coffee powder in the brewing chamber of the pressing assembly is pressed into a coffee cake by the hydraulic assembly. At the same time, the hot water from the boiler passes through the brewing chamber of the pressing assembly and flows out of the pressing assembly. A slag discharge hole is provided on one side of the shell below the hydraulic assembly. During the process of the pressing assembly resetting to the side of the powder inlet, the hydraulic assembly disengages from the brewing chamber of the pressing assembly. The coffee cake is reset by the push rod spring (704) in the brewing chamber, and is pushed by the push rod of the brewing chamber and falls out of the discharge hole of the shell. The characteristic of the pressing assembly is that the coffee powder in the pressing assembly is pressed into a coffee cake by the hydraulic assembly. The hydraulic assembly (4) is fixedly installed inside the screw (2). The external thread of the screw's outer diameter meshes with the internal thread of the helical gear (1). The outer diameter of at least one side of the helical gear extends out of the hydraulic assembly's outer gear ring and meshes with the small gear at the motor shaft of the second motor. The sealing seat inside the hydraulic assembly has a liquid outlet channel, and the top of the liquid outlet channel of the sealing seat has a hydraulic connection hole. The main body (701) below the brewing chamber of the powder pressing assembly (7) has symmetrically protruding swing shaft columns (7011) on both sides of its outer diameter. The swing shaft columns are fastened and fixed to the shaft buckle grooves on both sides of one end of the brewing support (9) at the bottom of the powder pressing assembly inside the housing. The swing shaft of the first motor is connected to the shaft hole (901) on one side of the shaft buckle groove of the brewing support through the housing. The other side of the brewing support The inner side of the end is symmetrically provided with protruding shaft pins (902). The shaft pins of the brewing support are respectively inserted into the symmetrical pin holes on both sides of the outer diameter of the brewing chamber below the powder pressing assembly. The powder pressing assembly and the brewing support are connected as one unit and rotated back and forth in a directional manner through the swing shaft of the first motor. A top slag pusher (702) is provided in the corner groove of the main body below the brewing chamber of the powder pressing assembly on one side of the shaft pin. The shaft of the top slag pusher is fastened and fixed to the corner groove of the powder pressing assembly and swings. The pusher head (7023) of one end of the top slag pusher extends into the powder pressing assembly and is inserted into the rod hole at the end of the rod of the brewing chamber pusher (703) that extends out from the bottom of the brewing chamber inside the powder pressing assembly. The outer diameter of the rod at the bottom of the brewing chamber pusher inside the brewing chamber is provided with the pusher spring (704).

2. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The brewing chamber of the tamping assembly (7) has an inner diameter of 52.0 mm, a maximum capacity of 39.0 g of coffee powder, a free height of 62.0 mm, a minimum height after compression of 25.0 mm, a maximum height after compression of 46.0 mm, and a rod height of 13.5 mm for the top tamping rod.

3. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The hydraulic assembly (4) is square, and the helical gears (1) extend out of the four end faces of the hydraulic assembly.

4. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The housing includes a first housing (6) and a second housing (10) on both sides of the tamping assembly (7), a hydraulic housing (3) on the outer diameter of the hydraulic assembly (4), a powder receiving cover (5) at the powder receiving port, the powder receiving port being set in the powder receiving cover, and the powder receiving cover on the outer diameter of the powder receiving port being fastened and fixed to the first housing and the second housing on one side above the top cavity of the brewing chamber in the vertical state of the tamping assembly; when the first housing, the second housing and the powder receiving cover are placed into the brewing tank on one side of the coffee machine as a whole, the T-shaped head at the top of the oblique protruding port of the first housing and the second housing is embedded and fixed in the T-shaped hole (301) at the bottom shell opening of the hydraulic housing inside the coffee machine, and the hydraulic assembly, the helical gear (1) and the screw (2) are set in the hydraulic housing; or, the first housing (6), the second housing (10), the powder receiving cover (5) and the hydraulic housing (3) are connected as a whole to form a housing, and the housing is placed into the brewing tank on one side of the coffee machine as a whole.

5. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The bottom opening of the powder receiving cover (5) above the top opening of the brewing chamber in the powder pressing assembly (7) is provided with a powder scraper (12). The plate hole of the powder scraper is aligned with the powder receiving hole of the powder receiving cover. The bottom of the powder scraper on one side of the rotation direction of the powder pressing assembly is provided with a raised powder scraping edge. The powder scraping edge of the powder scraper is higher than the bottom opening of the powder receiving cover, and the powder scraping edge of the powder scraper abuts against the top opening of the brewing chamber in the powder pressing assembly.

6. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 5, characterized in that... The outer diameter of the brewing chamber of the powder pressing assembly (7) below the powder scraping edge of the powder scraping plate (12) is provided with a slanted protruding slag pouring plate.

7. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The outer diameter of the shell is provided with protruding American coffee inlet (7012) and Italian coffee inlet on both sides. The American coffee inlet and Italian coffee inlet are respectively connected to the brewing chamber in the main body (701) of the tamping assembly (7) in the shell and the double liquid outlet channel in the hydraulic assembly (4). The bottom side of the brewing chamber in the tamping assembly is provided with a protruding brewing chamber inlet (7013). The hot water from the boiler is connected to the brewing chamber inlet through the American coffee inlet and Italian coffee inlet and the pressure hose (8) in the shell.

8. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The other end of the top slag pusher (702) is provided with a limiting shaft (7021) protruding outward, and a limiting post (601) is provided in the housing above the limiting shaft; when the coffee powder in the brewing chamber of the pressing assembly (7) is pressed into a coffee cake by the hydraulic assembly (4), the limiting shaft of the top slag pusher abuts against the limiting post in the housing.

9. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The top slag pusher (702) and the end corner groove of the main body (701) are respectively provided with swing rods (7022) that fit the outer diameter of the brewing support (9). The swing rods are provided with arc-shaped adjustment holes (602) on the outer shell of the main body.

10. The automatic extraction and brewing brewing device for high-volume coffee machines according to claim 1, characterized in that... The outer diameter of the outer shell of the tamping assembly (7) is provided with a loading and unloading button (11), and the shell is fastened and fixed in the brewer tank on the side of the coffee machine by the loading and unloading button.

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