A semi-automatic coffee brewing system

Abstract

This invention relates to a semi-automatic coffee machine brewing system, addressing the technical problems of poor stability and sealing, uneven brewing, limited operation, and inconvenient positioning inherent in similar products' brewing and handle structures. The key feature is that a pressure transmitter is installed on the outer diameter of the raised rear part of the brewing head support. One outlet of the pressure transmitter connects to the piston inlet connector on one side of the piston support's central hole, forming an extraction water path. The top inlet of the hydraulic piston inside the piston support connects to the solenoid valve of the coffee boiler's water outlet through the piston support's central hole. The hydraulic piston and piston support form a hydraulic chamber through the incoming water pressure. The piston is integrated with the brewing head support via screws threaded into mounting holes on both sides of the inlet hole and a screw at one end, forming a guide hole. The upper piston cover abuts against the outer diameter spring groove of the hydraulic piston inside the brewing head support via a return spring. The controller assembly is hemispherical and obliquely positioned on top of the brewing head assembly.

Description

Technical Field

[0001] This invention relates to a coffee machine brewing system, specifically a semi-automatic coffee machine brewing system. Background Technology

[0002] A coffee machine is an electrical appliance used for making coffee. They are generally divided into semi-automatic and fully automatic types. Semi-automatic coffee machines are a traditional Italian style, requiring manual operation for grinding, tamping, filling, brewing, and cleaning. These machines typically include a steam wand for frothing milk, heating, or cleaning. However, existing semi-automatic coffee machine brewing systems have the following problems: 1. Most existing semi-automatic espresso machines use a portafilter with a rubber seal. This relies on rotating the portafilter to forcefully press the brewing head against the coffee bowl, which is laborious, prone to uneven loading, and results in uneven sealing. 2. High-pressure extraction (9-19 bar) is prone to splashing, leakage, and pressure fluctuations, affecting coffee flavor. 3. With prolonged use, seals wear out quickly, locking force weakens, and maintenance becomes frequent. 4. Purely mechanical structures cannot achieve independent control of locking pressure and extraction pressure. To address this, some coffee machine brewing systems employ a water pressure chamber structure for tamping the coffee powder, such as Chinese patent application number 202321481762.9, authorized on February 2, 2024, entitled "Water Pressure Brewing Device, Water Pressure Brewing System and Coffee Machine"; the corresponding brewing system's handle assembly (extraction handle) adopts a two-in-one detachable structure design, such as Chinese patent application number 202422497230.5, authorized on October 17, 2025, entitled "A Detachable Coffee Machine Handle"; however, the above brewing structures and handle structures still suffer from poor stability and sealing, uneven brewing, limited operation methods, and inconvenient positioning. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a semi-automatic coffee machine brewing system that solves the technical problems of poor stability and sealing of the brewing structure and handle structure of existing similar products, resulting in uneven brewing, limited operation methods, and inconvenient positioning. This objective is achieved through the following technical solution.

[0004] A semi-automatic coffee machine brewing system includes a controller assembly, a brewing head assembly, and a funnel handle assembly. The brewing head assembly has a brewing head support inside its outer shell. A piston assembly is fitted into and fixed within the brewing head support at its bottom. A hydraulic piston is housed in a groove at the top of the piston support, extending from above into the groove. A piston sealing ring on the outer diameter of the hydraulic piston's end abuts against the inner wall of the groove in the piston support for sealing. The bottom end face of the piston support extends beyond the bottom of the brewing head support and is fitted with a water distribution assembly fixed to the piston support by screws. The water distribution assembly includes... The device includes a brewing head sealing ring, a water distribution mesh support, and a water distribution mesh. A funnel support is located on the outer bottom surface of the brewing head support at the outer side of the extended piston support. The funnel support, piston support, and brewing head shell are integrated into one unit. The bottomless powder bowl support of the funnel handle assembly is inserted into the funnel support through an opening on one side. The side ears on both sides of the bottomless powder bowl support slide into the side rail of the inner wall of the opening on one side of the funnel support. The top groove of the bottomless powder bowl support is aligned with the ring face of the brewing head sealing ring of the water distribution assembly above. The piston support moves downward, causing the ring face of the brewing head sealing ring to seal the top groove of the bottomless powder bowl support, and then the brewing operation is performed. The key structural design features a pressure transmitter mounted on the outer diameter of the raised rear end of the brewing head bracket. One outlet of the pressure transmitter connects to the piston inlet connector on one side of the piston bracket's central hole, forming an extraction water path. The top inlet of the hydraulic piston within the piston bracket connects to the solenoid valve of the coffee boiler inside the machine via the piston bracket's central hole. The hydraulic piston and piston bracket form a hydraulic chamber through the incoming water pressure. Symmetrical mounting holes are located on both sides of the piston's inlet within the piston bracket. The piston is connected to the brewing head bracket via a threaded screw post and a screw at one end, forming a guide hole. A piston cap is located at the top opening of the piston bracket within the brewing head bracket. The piston cap abuts against the outer diameter spring groove of the hydraulic piston within the brewing head bracket via a return spring. The middle inlet of the hydraulic piston is the coffee inlet, and the piston inlet connector on one side of the inlet is the high-pressure water inlet. This pressure transmitter is a pressure sensor, a sensitive device that converts liquid pressure into an electrical signal. It facilitates the rapid conversion of liquid pressure changes into electrical signals, which are then transmitted to the controller assembly to control the reciprocating operation of the hydraulic piston. The high-pressure water enters the hydraulic piston, causing the piston support, piston cover, and brewing head sealing ring to press against the coffee bowl. As the hydraulic piston presses down, the return spring is compressed downwards, achieving a strong sealing effect. After the sealing effect is achieved, hot water flows from the coffee inlet into the cavity of the funnel handle assembly.

[0005] A hot water pipe is located at the bottom of the protrusion at the rear of the brewing head bracket. The hot water pipe is connected to the inlet of the pressure transmitter, coffee boiler, steam boiler, and hydraulic piston via a pressure relief water circuit and a corresponding solenoid valve. Thus, while the hydraulic piston is adjusted by pressure relief, water is also supplied through the hot water pipe.

[0006] The piston support has a raised channel platform in the middle of the end face of the brewing head sealing ring. The annular end face outside the channel platform has a sealing groove for fixing the brewing head sealing ring. The large circular end face of the channel platform has an annular groove in the middle, which communicates with the sealing groove through equally spaced channel grooves. The small circular end face inside the annular groove has a bracket connector hole on one side of the center hole for installing the piston water inlet connector. Two screw holes are respectively provided on one side of the center hole and the bracket connector hole. The bracket connector hole is located in the annular groove in the middle of the large circular end face. The piston water inlet connector is sealed and installed in the bracket connector hole of the piston support through the piston connector hole of the hydraulic piston. Corresponding connector sealing rings are provided on the outer diameter of the connection. This structural design further stabilizes the water distribution and outlet at the water distribution assembly.

[0007] The piston support has equidistant annular grooves at the bottom of its inner recess. The central hole of the piston support is located in the middle of these annular grooves, and the support joint holes of the piston support are located on multiple annular grooves on one side of the central hole. This structural design further stabilizes the water pressure within the hydraulic chamber.

[0008] The bottomless bowl holder of the funnel handle assembly has a raised block on one side of its outer diameter. Symmetrically positioned on either side of the bottom of the brewing head holder above the block are a left plunger support and a right plunger support. At least one of the left or right plunger supports contains a ball-head plunger. A steel ball inside the ball-head plunger extends out from the opposite side of the left and right plunger supports via a plunger spring. When the bottomless bowl holder is inserted directly into the funnel holder through one side opening, the block of the bottomless bowl holder is inserted between the left and right plunger supports at the bottom of the brewing head holder. The steel ball inside the ball-head plunger is engaged in a steel ball groove on one side of the block by the plunger spring. This structural design facilitates the direct insertion and fixation of the bottomless bowl holder of the funnel handle assembly to the funnel holder, making operation simple and effortless.

[0009] The funnel support at the block is equipped with a corresponding micro switch. When the bottomless powder bowl support of the funnel handle assembly is placed into the funnel support, the block abuts against the micro switch.

[0010] The funnel handle assembly features a bottomless powder bowl support with a screw-in, threaded horn-shaped bracket at its bottom. A horn-shaped nozzle is located in the center hole at the bottom of the horn-shaped bracket. A powder bowl retaining spring is located in a retaining spring groove at the inner diameter of the top bowl opening above the internal thread of the bottomless powder bowl support. The outer diameter groove below the outward-flared edge of the powder bowl's rim is secured to the retaining spring inside the powder bowl. The outward-flared edge of the powder bowl's rim is confined to the top bowl opening of the bottomless powder bowl support. This structural design facilitates the disassembly of the horn-shaped bracket and nozzle, allowing it to be used as a funnel handle assembly combining both bottomless and bottomed designs.

[0011] The bottomless powder bowl support has a handle on the outer diameter of the symmetrical square side. A square hole at one end of the handle fits into the bottom square post of the handle rod of the bottomless powder bowl support and is connected to the bottomless powder bowl support by a screw hole and screw at the end of the handle rod inside the handle. A handle fixing cap is provided at the opening of the other end of the handle. The above structural design facilitates the installation and removal of the handle.

[0012] The bottom of the bottomless powder bowl support has a raised platform at the bottom of the horn-shaped support on the square side. This platform is waist-shaped. This structural design facilitates the placement of the funnel handle assembly.

[0013] The controller assembly is hemispherically positioned on top of the brewing head housing of the brewing head assembly, with its top plane angled outwards. This structural design facilitates the use of the controller assembly.

[0014] The top center of the brewing head housing has an arc-shaped concave surface, and the bottom convex surface of the obliquely positioned controller assembly fits against the arc-shaped concave surface of the brewing head housing and is fixed with screws. This structural design further facilitates the installation of the controller assembly and the brewing head housing bracket, and improves installation stability.

[0015] The structure of this invention is reasonably designed, easy and simple to use and operate, has good stability and sealing, produces good coffee flavor, has uniform and reliable hydraulic pressure, and has a long service life; it is suitable for use as a semi-automatic coffee machine brewing system, as well as for structural improvements to similar products. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention.

[0017] Figure 2 yes Figure 1 A schematic diagram of the internal structure.

[0018] Figure 3 yes Figure 1 A schematic diagram of the exploded structure, omitting the funnel handle assembly.

[0019] Figure 4 yes Figure 3 A magnified schematic diagram of the bottom inner structure of the piston support.

[0020] Figure 5 yes Figure 4 A schematic diagram of the bottom end face structure of the piston support.

[0021] Figure 6 yes Figure 3 A schematic diagram of the bottom end face structure of a hydraulic piston.

[0022] Figure 7 yes Figure 1 Partial sectional view Figure 1 .

[0023] Figure 8 yes Figure 1 Schematic diagram of cross-section Figure 2 .

[0024] Figure 9 yes Figure 1 A three-dimensional structural diagram of the funnel handle assembly is shown, with the addition of a left plunger support and a right plunger support on both sides of the block.

[0025] Figure 10 yes Figure 1 A cross-sectional view of the funnel handle assembly.

[0026] Figure 11 yes Figure 1 A schematic diagram of the exploded structure of the funnel handle assembly.

[0027] Figure 12 This is a schematic diagram of the working principle of the water system of the present invention.

[0028] Figure 13 This is a cross-sectional structural diagram of Embodiment 2 of the present invention.

[0029] Attached Figures and Their Names: 1. Controller Assembly; 2. Brewing Head Assembly; 3. Funnel Handle Assembly; 301. Bottomless Powder Bowl Support; 3011. Cube; 302. Horn Support; 3021. Placement Platform; 303. Horn Nozzle; 304. Powder Bowl Clip; 305. Handle; 306. Handle Fixing Cover; 307. Powder Bowl; 4. Hot Water Pipe; 5. Pressure Transmitter; 6. Brewing Head Housing; 7. Brewing Head Support; 8. [Unclear - possibly a component or part] 9. Plug cap, 10. Return spring, 11. Hydraulic piston, 12. Piston connector hole, 13. Piston seal ring, 14. Piston inlet connector, 15. Piston bracket, 16. Channel platform, 17. Bracket connector hole, 18. Brewing head seal ring, 19. Water distribution network bracket, 10. Water distribution network, 11. Ball head plunger, 12. Left plunger bracket, 13. Right plunger bracket, 14. Funnel bracket, 25. Micro switch. Implementation

[0030] The structure and use of the present invention will now be further described with reference to the accompanying drawings. Figures 1-12The illustrated embodiment shows a system comprising a controller assembly 1, a brewing head assembly 2, and a funnel handle assembly 3. The brewing head assembly has a brewing head housing 6 with a brewing head bracket 7 inside. A piston assembly is fitted into and fixed within the brewing head bracket at its bottom. A hydraulic piston 10 is located in a groove at the top of the piston bracket 13 of the piston assembly. The hydraulic piston is fitted into the groove from above, and a piston sealing ring 11 on the outer diameter of the hydraulic piston's end abuts against and seals the inner wall of the groove in the piston bracket. The bottom end face of the piston bracket extends beyond the bottom of the brewing head bracket and has a water distribution assembly fixed to the piston bracket by screws. The water distribution assembly includes a brewing head housing. The head sealing ring 14, water distribution net support 15, water distribution net 16, and the bottom outer end face of the brewing head support at the outside of the extended piston support are provided with a funnel support 20. The funnel support, piston support, and brewing head shell are integrated. The bottomless powder bowl support 301 of the funnel handle assembly is inserted into the funnel support through the opening on one side of the funnel support. The side ears on both sides of the bottomless powder bowl support slide into the side rail of the inner wall of the opening on one side of the funnel support. The top groove of the bottomless powder bowl support is aligned with the ring face of the brewing head sealing ring of the water distribution assembly above. The piston support moves downward to drive the ring face of the brewing head sealing ring to seal the top groove of the bottomless powder bowl support and then the brewing operation is performed. A pressure transmitter 5 is provided on the outer diameter of the raised part of the brewing head bracket. The water outlet on one side of the pressure transmitter is connected to the piston water inlet connector 12 on the side of the center hole of the piston bracket to form an extraction water path. The water inlet of the top of the hydraulic piston in the piston bracket is connected to the solenoid valve of the coffee boiler in the machine body through the center hole of the piston bracket. The hydraulic piston and the piston bracket form a hydraulic chamber through the water pressure of the inlet water. The piston in the piston bracket has symmetrical mounting holes on both sides of the water inlet of the piston. The piston is connected to the brewing head bracket by the screw post and the screw at one end through the threaded connection in the mounting hole and forms a guide hole. The piston cover 8 is provided at the top hole of the piston bracket in the brewing head bracket. The piston cover abuts against the outer diameter spring groove of the hydraulic piston in the brewing head bracket through the return spring 9. The water inlet in the middle of the hydraulic piston is the coffee water inlet. The piston water inlet connector on the side of the water inlet of the hydraulic piston is the high pressure water inlet. Hot water pipe 4 is located at the bottom of the protrusion at the rear of the brewing head bracket. The hot water pipe is connected to the inlet of the pressure transmitter, coffee boiler, steam boiler, and hydraulic piston through the pressure relief water circuit and the corresponding solenoid valve.

[0031] The piston support has a raised channel platform 1301 at the center of the end face of the brewing head sealing ring. The annular end face outside the channel platform has a sealing groove for fixing the brewing head sealing ring. The large circular end face of the channel platform has an annular groove in the center, which communicates with the sealing groove through equally spaced channel grooves. The small circular end face inside the annular groove has a bracket connector hole 1302 for installing the piston water inlet connector on one side of the center hole. Two screw holes are respectively provided on one side of the center hole and the bracket connector hole. The bracket connector hole is located in the annular groove in the center of the large circular end face. The piston water inlet connector is sealed and installed in the bracket connector hole of the piston support through the piston connector hole 1001 of the hydraulic piston. Corresponding connector sealing rings are provided on the outer diameter of the connection. The bottom of the inner groove of the piston support has equally spaced annular grooves. The center hole of the piston support is located in the center of the annular grooves, and the bracket connector holes of the piston support are located on multiple annular grooves on one side of the center hole.

[0032] The bottomless bowl support of the funnel handle assembly has a raised block 3011 on one side of the outer diameter in the middle. The bottom of the brewing head support above the block has a left plunger support 18 and a right plunger support 19 symmetrically arranged on both sides. At least one of the left or right plunger supports has a ball plunger 17. The steel ball in the ball plunger extends out of the left and right plunger supports on the opposite side through the action of the plunger spring. When the bottomless bowl support is inserted directly from one side opening of the funnel support, the block of the bottomless bowl support is inserted directly between the left and right plunger supports at the bottom of the brewing head support. The steel ball in the ball plunger is engaged in the steel ball groove on one side of the block through the action of the plunger spring. The bottomless bowl support of the funnel handle assembly has a horn bracket 302 that is screwed in from below and threadedly connected. The middle hole at the bottom of the horn bracket has a horn tip 303. A bowl retainer 304 is provided in the retainer groove at the top of the bowl opening above the internal thread of the bottomless bowl support. The outer diameter groove below the outward flared edge of the bowl opening of the bowl 307 is snapped and fixed to the bowl retainer inside the bowl. The outward flared edge of the bowl opening is limited to the top bowl opening of the bottomless bowl support.

[0033] Furthermore, the square block 3011 of the bottomless bowl support has a handle on its outer diameter symmetrically on the other side. A square hole at one end of the handle 305 fits into the bottom square post of the handle of the bottomless bowl support, and is connected to the bottomless bowl support via a screw hole and screw at the end of the handle. A handle fixing cap 306 is provided at the other end of the handle. A raised placement platform 3021, waist-shaped, is provided at the bottom of the horn-shaped support on one side of the square block of the bottomless bowl support.

[0034] Furthermore, the aforementioned controller assembly is hemispherically positioned on the top of the brewing head housing of the brewing head assembly, with the top plane of the controller assembly angled outwards. A concave arc surface is located in the center of the top of the brewing head housing, and the convex bottom surface of the angled controller assembly is fitted against the concave arc surface of the brewing head housing and secured with screws.

[0035] The system mainly includes a brewing head assembly, a funnel handle assembly, a hydraulic locking and sealing mechanism, and a water circuit control module, as follows: The brewing head assembly includes a brewing head shell, a brewing head bracket, a pressure transmitter, a brewing head sealing ring, a water distribution mesh bracket, and a water distribution mesh; the lower end face has an annular sealing groove with a built-in main sealing ring; internally, there is an axial hydraulic chamber with a built-in piston cover, return spring, hydraulic piston, and piston sealing ring. The funnel handle assembly includes a powder bowl, a bottomless powder bowl bracket, a horn bracket, a horn nozzle, a handle fixing cover, and a handle; the bottomless powder bowl bracket is used to hold a standard powder bowl, which aligns with the brewing head to form an extraction chamber, and has a circumferential positioning boss for mechanical positioning with the brewing head. The hydraulic locking and sealing mechanism has a hydraulic chamber located inside the brewing head, independently separate from the extraction water circuit; after water pressure is applied to the hydraulic piston and piston sealing ring, the return spring is compressed, causing the hydraulic piston, piston bracket, and brewing head sealing ring to move downwards, pressing the upper edge of the powder bowl. The circumferential sealing structure of the aforementioned hydraulic locking and sealing mechanism simultaneously achieves radial sealing through an expansion ring, preventing high-pressure water from overflowing. The water circuit control module includes a coffee boiler, a steam boiler, a water pump, a solenoid valve, a check valve, and a pressure relief valve; the timing control is as follows: first lock → then extract → first relieve pressure → then open the lid.

[0036] Meanwhile, the direct-insertion fixing mechanism of the aforementioned funnel handle assembly is as follows: the funnel handle assembly only needs to be placed on the funnel holder. When fixing the funnel handle assembly with the direct insertion method, you only need to hear the ball plunger click to indicate that the funnel handle assembly is fixed. This structure is convenient for users to operate. The hydraulic locking and sealing mechanism works by applying pressure to the piston support when high-pressure water enters, creating a hydraulic chamber that moves the piston towards the coffee machine handle assembly. The brewing head sealing ring presses against the coffee bowl, achieving a strong sealing effect.

[0037] In use, after the funnel handle assembly has collected coffee grounds in the grinding system and compacted them into a coffee puck, it is placed under the brewing system to brew the coffee. After the brewing head sealing ring seals the coffee bowl of the funnel handle assembly, the extraction water enters the coffee bowl, and the water level rises as the water level increases, achieving high-pressure extraction. The brewing head sealing ring, as a sealing element, forms a self-reinforcing sealed cavity with the coffee bowl of the funnel handle assembly. After extraction is complete, the funnel handle assembly depressurizes, the brewing head depressurizes immediately, and the funnel handle assembly opens.

[0038] Based on the above structural characteristics, such as Figure 13 In the second embodiment shown, the funnel support on the side of the bottomless powder bowl support of the funnel handle assembly is provided with a corresponding micro switch 21. When the bottomless powder bowl support of the funnel handle assembly is placed into the funnel support, the block abuts and triggers the micro switch.

[0039] In summary, this system is a hydraulic locking and sealing brewing system for semi-automatic coffee machines. It uses water pressure as a power source to achieve uniform circumferential locking and dynamic sealing, solving the problems of leakage, laborious operation, and unstable pressure associated with traditional rotary locking systems. The beneficial effects of this system are as follows: 1. Uniform hydraulic locking: Consistent circumferential pressure, no uneven load, no leakage, and no splashing; 2. Independent control of locking and extraction pressure: More stable extraction, thicker crema, and consistent flavor; 3. Effortless operation: Eliminates the tedious rotating and tightening action of the handle, making it simple and convenient to use; the handle is only positioned, making it easy for the elderly / women to use; 4. Dynamic sealing: Sealing force increases with pressure under high pressure, resulting in a more reliable seal; 5. Low wear and long lifespan: No hard friction, extending the lifespan of the seals; 6. Simple structure and easy maintenance, without complex gears / lead screws.

Claims

1. A semi-automatic coffee machine brewing system, comprising a controller assembly (1), a brewing head assembly (2), and a funnel handle assembly (3). The brewing head assembly has a brewing head support (7) inside its brewing head housing (6). A piston assembly is fitted into and fixed within the brewing head support at its bottom. A hydraulic piston (10) is located in a groove at the top of the piston support (13) of the piston assembly. The hydraulic piston is fitted into the groove from above the piston support. A piston sealing ring (11) on the outer diameter of the hydraulic piston end abuts against and seals the inner wall of the groove in the piston support. The bottom end face of the piston support extends beyond the bottom of the brewing head support and is fitted with a water distribution assembly fixed to the piston support by screws. The components include a brewing head sealing ring (14), a water distribution net support (15), and a water distribution net (16). A funnel support (20) is provided on the outer bottom surface of the brewing head support at the outer side of the extended piston support. The funnel support, piston support, and brewing head shell are integrated. The bottomless powder bowl support (301) of the funnel handle assembly is inserted into the funnel support through the opening on one side of the funnel support. The side ears on both sides of the bottomless powder bowl support slide into the side rail of the inner wall of the opening on one side of the funnel support. The top groove of the bottomless powder bowl support is aligned with the ring face of the brewing head sealing ring of the upper water distribution assembly. The piston support moves downward to drive the ring face of the brewing head sealing ring to seal the top groove of the bottomless powder bowl support before brewing operation. The upper outer diameter of the rear protrusion of the brewing head bracket (7) is provided with a pressure transmitter (5). The outlet of the pressure transmitter is connected to the piston water inlet connector (12) on the side of the center hole of the piston bracket (13) to form an extraction water path. The top water inlet of the hydraulic piston (10) inside the piston bracket is connected to the solenoid valve of the coffee boiler in the machine body through the center hole of the piston bracket. The hydraulic piston and the piston bracket form a hydraulic chamber through the water pressure of the inlet. The piston in the piston bracket is provided with mounting holes on both sides of the water inlet of the piston. The piston is connected to the brewing head bracket by the screw post and the screw at one end through the threaded connection in the mounting hole and forms a guide hole. The top hole of the piston bracket inside the brewing head bracket is provided with a piston cover (8). The piston cover abuts against the outer diameter spring groove of the hydraulic piston inside the brewing head bracket through the return spring (9). The water inlet in the middle of the hydraulic piston is the coffee water inlet. The piston water inlet connector on the side of the water inlet of the hydraulic piston is the high pressure water inlet.

2. The semi-automatic coffee machine brewing system according to claim 1, characterized in that... The bottom of the rear protrusion of the brewing head bracket (7) is provided with a hot water pipe (4). The hot water pipe is connected to the water inlet of the pressure transmitter (5), coffee boiler, steam boiler and hydraulic piston (10) respectively through the pressure relief water circuit and the corresponding solenoid valve.

3. The semi-automatic coffee machine brewing system according to claim 1, characterized in that... The piston support (13) has a raised channel platform (1301) in the middle of the end face of the brewing head sealing ring (14). The annular end face outside the channel platform has a sealing groove for fixing the brewing head sealing ring. The large circular end face of the channel platform has an annular groove in the middle. The annular groove is connected to the sealing groove through the channel grooves set at equal intervals. The small circular end face inside the annular groove has a bracket joint hole (1302) for installing the piston water inlet connector (12) on one side of the center hole. The center hole and the bracket joint hole are respectively provided with two screw holes. The bracket joint hole is located in the annular groove in the middle of the large circular end face. The piston water inlet connector is sealed and installed in the bracket joint hole of the piston support through the piston joint hole (1001) of the hydraulic piston (10). The outer diameter of the connection is provided with corresponding joint sealing rings.

4. The semi-automatic coffee machine brewing system according to claim 3, characterized in that... The piston bracket (13) has an annular groove at equal intervals at the bottom of its inner groove. The central hole of the piston bracket is located in the middle of the annular groove. The bracket joint hole (1302) of the piston bracket is located on multiple annular grooves on one side of the central hole.

5. The semi-automatic coffee machine brewing system according to claim 1, characterized in that... The bottomless bowl support (301) of the funnel handle assembly (3) has a raised block (3011) on one side of the outer diameter of the middle. The bottom of the brewing head support (7) above the block is symmetrically provided with a left plunger support (18) and a right plunger support (19). At least one of the left plunger support or the right plunger support is provided with a ball plunger (17). The steel ball in the ball plunger extends out of the left plunger support and the right plunger support on the opposite side through the action of the plunger spring. When the bottomless bowl support is inserted directly from the opening on one side of the funnel support (20), the block of the bottomless bowl support is inserted directly between the left plunger support and the right plunger support at the bottom of the brewing head support. The steel ball in the ball plunger is locked into the steel ball groove on one side of the block through the action of the plunger spring.

6. The semi-automatic coffee machine brewing system according to claim 5, characterized in that... The funnel support (20) at the block (3011) is equipped with a corresponding micro switch (21). When the bottomless powder bowl support (301) of the funnel handle assembly (3) is placed into the funnel support, the block abuts and triggers the micro switch.

7. The semi-automatic coffee machine brewing system according to claim 5, characterized in that... The bottomless bowl support (301) of the funnel handle assembly (3) is provided with a cow horn support (302) screwed in from below and threadedly connected. The middle hole at the bottom of the cow horn support is provided with a cow horn mouth (303). The inner diameter of the bowl opening above the inner thread of the bottomless bowl support is provided with a bowl retainer (304). The outer diameter groove below the outer edge of the bowl opening of the bowl (307) is fastened to the bowl retainer inside the bowl. The outer edge of the bowl opening of the bowl is limited to the top bowl opening of the bottomless bowl support.

8. The semi-automatic coffee machine brewing system according to claim 7, characterized in that... The bottomless powder bowl support (301) has a handle rod on the outer diameter of the block (3011) on the other side. The square hole at one end of the handle (305) is fitted into the bottom square post of the handle rod of the bottomless powder bowl support and is connected to the bottomless powder bowl support by the screw hole and screw at the end of the handle rod inside the handle. The other end of the handle is provided with a handle fixing cover (306).

9. The semi-automatic coffee machine brewing system according to claim 8, characterized in that... The bottom of the horn-shaped support (302) below the square (3011) side of the bottomless powder bowl support (301) is provided with a raised placement platform (3021), which is waist-shaped.

10. The semi-automatic coffee machine brewing system according to claim 1, characterized in that... The controller assembly (1) is hemispherically disposed on the top of the brewing head shell (6) of the brewing head assembly (2), and the top plane of the controller assembly is obliquely outward.

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