Beverage machine

Abstract

A beverage machine comprises a brewing cylinder, an upper piston and a lower piston, the upper piston and the lower piston are respectively engaged with two ends of the brewing cylinder to form a brewing chamber; a beverage outlet; a water storage tray; a water supply pipeline, a three-way valve is arranged on the water supply pipeline; the three-way valve selectively connects the brewing chamber and the water supply pipeline or the brewing chamber and the water storage tray; an output pipeline is connected between the upper piston and the beverage outlet; a pressure storage valve and a switching assembly are connected on the output pipeline; the pressure storage valve comprises a first conveying port, a second conveying port and a flow direction adjusting piece; the switching assembly comprises an input channel, a first output channel and a second output channel; the first conveying port is connected to a beverage outlet end of the upper piston, and the second conveying port is connected to the output pipeline; the flow direction adjusting piece selectively controls the pressure storage valve to switch between a first communication mode and a second communication mode, so that liquid flow directly passes between the first conveying port and the second conveying port or the liquid flow flows from the first conveying port to the second conveying port after overcoming a preset pressure accumulation pressure.

Description

Technical Field

[0001] This utility model relates to the field of beverage devices, and more particularly to a beverage machine. Background Technology

[0002] Existing beverage machines (such as coffee machines) typically use a brewer to make coffee and other beverages. The brewer usually consists of an upper piston, a lower piston, and a brewing cylinder, which together form a closed brewing chamber used to fill and extract coffee grounds and other beverage particles. During beverage preparation, hot water enters the brewing chamber through a water supply line, undergoes high-temperature and high-pressure extraction, and then the beverage flows out through an outlet pipe. This design effectively extracts the flavor and oils of the coffee, resulting in high-quality coffee.

[0003] Some beverage machines only offer high-pressure extraction, limiting their flexibility in beverage preparation. When cleaning the brewing lines, these machines often follow the same path as the beverage output, resulting in residual liquid. Discharging this residual liquid requires additional piping, pumps, and valves. These devices are typically complex, with intricate control logic, increasing manufacturing costs and the risk of malfunction.

[0004] Existing beverage machines generally suffer from low functional integration and fragmented system structure. They either can only perform a single beverage making function, making cleaning and maintenance inconvenient; or they simply stack modules to add auxiliary functions, making the overall structure complex, increasing costs, and failing to achieve smooth and intelligent switching between different working modes (such as extraction, waste discharge, and cleaning). Summary of the Invention

[0005] The purpose of this invention is to provide a beverage machine with high integration and multiple functions.

[0006] To achieve the above-mentioned utility model objectives, one embodiment of this utility model provides a beverage machine, comprising: A brewing device includes a brewing cylinder, an upper piston, and a lower piston, wherein the upper piston and the lower piston are respectively engaged with both ends of the brewing cylinder to form a brewing chamber; Beverage exports; Water storage tray; A water supply pipeline is provided, and a three-way valve is provided on the water supply pipeline; the three-way valve leads to the water storage pan through a first waste pipe; the three-way valve can selectively connect the brewing chamber and the water supply pipeline or connect the brewing chamber and the water storage pan; The output pipe connects between the upper piston and the beverage outlet; The output pipeline is connected to a pressure storage valve and a switching assembly; the pressure storage valve includes a first delivery port, a second delivery port, and a flow direction regulating component; the switching assembly includes an input channel, a first output channel, and a second output channel; the upper piston has a drinking end, the first delivery port is connected to the drinking end, the second delivery port is connected to the output pipeline, the input channel is connected to the output pipeline, the first output channel is connected to the beverage outlet, and the second output channel leads to the water storage tray; The flow direction regulating component can selectively control the pressure storage valve to switch between a first connection mode and a second connection mode; the first connection mode is configured to allow the liquid flow to pass directly between the first delivery port and the second delivery port; the second connection mode is configured to allow the liquid flow to flow from the first delivery port to the second delivery port after overcoming a preset pressure storage pressure.

[0007] Compared with the prior art, in the embodiments of this utility model, by setting a pressure storage valve with selectable connection mode (direct flow or pressurized flow) and a switching component that can guide the liquid flow to the beverage outlet or water storage pan, and working in conjunction with the three-way valve in the water supply pipeline, the beverage machine can achieve efficient operation in a single system with fewer components. High pressure / accumulation extraction mode: After the liquid is pressurized in the brewing chamber, it can be stored in pressure through the pressure storage valve before outputting a high-quality beverage; Normal or low pressure output mode: Liquid can bypass the pressure storage function of the pressure storage valve and be output directly; Convenient cleaning and waste disposal mode: Residual liquid or cleaning water in the brewing chamber and pipeline can be directly directed to the water storage pan or beverage outlet through the switching component, without going through the pressure storage valve, simplifying the cleaning and waste disposal process. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a beverage machine in one embodiment of the present invention, showing the direction of fluid flow in the beverage extraction mode.

[0009] Figure 2 This is a schematic diagram of another type of beverage machine, showing the direction of fluid flow under forward rinsing.

[0010] Figure 3 yes Figure 2 A schematic diagram of a beverage machine, showing the direction of fluid flow during reverse rinsing.

[0011] Figure 4 yes Figure 1 A schematic diagram of one embodiment of the pressure storage valve of a beverage machine, wherein the pressure storage seal closes the first connection port under the action of an elastic element.

[0012] Figure 5 yes Figure 4A schematic diagram of a pressure storage valve, in which the pressure storage seal opens the first connection port under the action of the flow direction regulating element.

[0013] Figure 6 This is a schematic diagram of another structural form of a pressure accumulator valve.

[0014] Figure 7 yes Figure 1 A schematic diagram of another embodiment of the pressure storage valve of the beverage machine, wherein the flow direction regulator closes the second connection port.

[0015] Figure 8 yes Figure 7 A schematic diagram of a medium-pressure storage valve, in which the flow direction regulating element opens the second connection port.

[0016] Figure 9 This is a schematic diagram of another structural form of a pressure accumulator valve.

[0017] Figure 10 yes Figure 9 Schematic diagram of cross section along line AA.

[0018] Figure 11 This is a schematic diagram of another structural form of a pressure accumulator valve.

[0019] Figure 12 This is a schematic diagram of a beverage machine in another embodiment of the present invention, showing the direction of fluid flow in the beverage extraction mode.

[0020] Figure 13 yes Figure 12 A schematic diagram of a beverage machine, showing the direction of fluid flow during forward rinsing.

[0021] Figure 14 yes Figure 12 A schematic diagram of a beverage machine, showing the direction of fluid flow during reverse rinsing. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0023] It should be understood that terms such as “upper,” “lower,” “outer,” and “inner,” used herein to indicate spatial relative position, are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms for spatial relative position may be intended to include different orientations of the equipment in use or operation other than those shown in the figures. As used herein, the terms “first,” “second,” and “third” may be used interchangeably to distinguish one component from another, and these terms are not intended to indicate the location or importance of individual components.

[0024] Reference Figures 1 to 3 as well as Figures 12 to 14 The beverage machine provided in this application includes a water supply pipe 31, a brewer 20, an output pipe 34, and a pressure storage valve 40. The brewer 20 includes a brewing cylinder 21, an upper piston 22, and a lower piston 23, wherein the upper piston 22 and the lower piston 23 are respectively engaged with the two ends of the brewing cylinder 21 to form a brewing chamber for extracting beverages.

[0025] The beverage machine also includes a beverage outlet 33 and a water reservoir 36. An output pipe 34 connects the upper piston 22 and the beverage outlet 33. Specifically, the brewer 20 has a water inlet 231 and a beverage outlet 221 positioned opposite each other, with the water inlet 231 located at the lower piston 23 and the beverage outlet 221 located at the upper piston 22. One end of the output pipe 34 is connected to the beverage outlet 221, and the other end of the output pipe 34 is connected to the beverage outlet 33.

[0026] The beverage machine also includes a three-way valve 32 connected to the water inlet 231. The three-way valve 32 has three ports: two ports are connected to the water supply pipe 31, and the third port is connected to the first waste pipe 551. The three-way valve 32 can selectively connect the brewing chamber to the water supply pipe 31 or to the brewing chamber and the water storage tray 36. In other words, the three-way valve 32 can selectively control the water supply pipe 31 to connect to the water inlet 231 of the brewer 20. The three-way valve 32 can be used to discharge liquid from the brewer 20 into the water storage tray 36 and / or release pressure in the brewing chamber to the atmosphere through the first waste pipe 551. The three-way valve 32 can also be referred to as a pressure relief valve.

[0027] The pressure storage valve 40 is connected to the drinking end 221 and is used to control the pressure of the liquid output from the drinking end 221, thereby regulating the extraction state of the beverage. One end of the output pipe 34 is connected to the drinking end 221, and the pressure storage valve 40 is connected to the output pipe 34. The beverage prepared by the brewer 20 flows sequentially through the drinking end 221, the pressure storage valve 40, and the output pipe 34, and is finally output to the beverage outlet 33.

[0028] The pressure storage valve 40 includes a first delivery port 411, a second delivery port 412, and a flow direction regulating element 45. The drinking end 221 is connected to the first delivery port 411, and the second delivery port 412 is connected to the output pipeline 34.

[0029] Reference Figures 1 to 3 as well as Figures 12 to 14 The beverage machine also includes a switching assembly 50 disposed on the output pipe 34. The switching assembly 50 is connected between the pressure storage valve 40 and the beverage outlet 33. The switching assembly 50 includes an input channel 503, a first output channel 501, and a second output channel 502. The input channel 503 is connected to the second delivery port 412, the first output channel 501 is connected to the beverage outlet 33, and the switching assembly 50 is connected to the output pipe 34; the second output channel 502 leads to the water storage pan 36, specifically, the second output channel 502 is connected to the second waste pipe 552, and the second waste pipe 552 leads to the water storage pan 36.

[0030] The flow direction regulating component 45 can selectively control the pressure storage valve 40 to switch between a first connection mode and a second connection mode; the first connection mode is configured to allow the liquid flow to pass directly between the first delivery port 411 and the second delivery port 412; the second connection mode is configured to allow the liquid flow to flow from the first delivery port 411 to the second delivery port 412 after overcoming the preset pressure storage pressure.

[0031] By incorporating a pressure-retaining valve 40 with selectable connection methods (direct or pressurized), and a switching assembly 50 that guides liquid flow to the beverage outlet 33 or the water reservoir 36, and working in conjunction with a three-way valve 32 in the water supply line 31, this beverage machine can achieve efficient operation in a single system with fewer components. High pressure / accumulation extraction mode: After the liquid is pressurized in the brewing chamber, it can be accumulated by the pressure storage valve 40 before outputting a high-quality beverage; Normal or low pressure output mode: Liquid can bypass the pressure storage function of the pressure storage valve 40 and be output directly; Convenient cleaning and waste disposal mode: Residual liquid or cleaning water in the brewing chamber and pipeline can be directly directed to the water storage pan 36 or beverage outlet 33 through the switching component 50, without going through the pressure storage valve 40, simplifying the cleaning and waste disposal process.

[0032] In the beverage extraction mode, the input channel 503 is connected to the first output channel 501, ensuring that the beverage flows to the beverage outlet 33. By switching between the open and closed states of the flow direction adjuster 45, either a low-pressure extraction mode or a pressurized extraction mode can be selected.

[0033] The flow direction regulating component 45 is operable to switch between an open and closed state. In beverage extraction mode, when the flow direction regulating component 45 is in the open state, the liquid produced by the brewing chamber is a first beverage (such as a light beverage produced by low-pressure extraction); when the flow direction regulating component 45 is in the closed state, the liquid produced by the brewing chamber is a second beverage (such as a rich beverage produced by high-pressure extraction). The pressure inside the brewing chamber is different during the production of the first and second beverages. The first beverage is the beverage prepared in the low-pressure extraction mode, and the second beverage is the beverage prepared in the pressurized extraction mode. The concentration of the first beverage is different from that of the second beverage. The flow direction regulating component 45 is always in the open state when the brewing chamber produces the first beverage; the flow direction regulating component 45 is in the closed state when the brewing chamber produces the second beverage.

[0034] In rinsing mode, the cleaning liquid can be discharged from the output pipe 34. When the input channel 503 is connected to the first output channel 501, the cleaning liquid can be discharged from the beverage outlet 33 to the water storage pan 36; when the input channel 503 is connected to the second output channel 502, the cleaning liquid can be discharged from the second waste pipe 552 to the water storage pan 36.

[0035] In the rinsing mode, the cleaning liquid can also be discharged from the first waste pipe 551 to the water storage pan 36. The three-way valve 32 connects the brewing chamber and the water storage pan 36, and the liquid in the brewing chamber can be discharged from the inlet end 231 to the water storage pan 36 through the first waste pipe 551.

[0036] Taking coffee preparation as an example, after the beverage machine has prepared a certain number of cups of coffee, if the brewer 20 is not rinsed, the filter screen will easily become clogged with coffee grounds. When rinsing the brewer with water, the water flows along the coffee liquid output path, and after rinsing, water will remain in the output pipe 34. When preparing the next cup of coffee, the residual water in the output pipe 34 will be discharged into the user's cup, thus affecting the coffee quality.

[0037] After the rinsing mode, the mode for purging the output pipe 34 is called the purging mode. In the purging mode, the switching component 50 connects the input channel 503 and the beverage outlet 33. The upper piston 22 and the lower piston 23 are respectively engaged with the two ends of the brewing cylinder 21 and move in opposite directions to increase the volume of the brewing chamber, so that the liquid in the pipe between the beverage outlet 33 and the upper piston 22 flows back into the brewing chamber through the pressure storage valve 40. The upper piston 22 and the lower piston 23 are respectively engaged with the two ends of the brewing cylinder 21 and move towards each other to decrease the volume of the brewing chamber, so that the liquid in the brewing chamber is discharged into the water storage pan 36.

[0038] Specifically, the pressure storage valve 40 switches to the first connection mode, and the switching component 50 switches to connect the input channel 503 with the first output channel 501. The upper piston 22 and / or lower piston 23 of the brewer 20 are driven to move axially along the brewing cylinder 21, thereby increasing the volume of the brewing chamber and generating negative pressure in the brewing chamber. Since there is fluid communication between the beverage outlet 33 and the brewing chamber, water in the pipeline between the beverage outlet 33 and the brewing chamber can be drawn back into the brewing chamber under the action of negative pressure. Then, by controlling the upper piston 22 and / or lower piston 23 of the brewer 20 to reduce the volume of the brewing chamber, and in conjunction with the control of the switching component 50 and / or the three-way valve 32, the water flowing back into the brewing chamber can be discharged to the water storage pan 36.

[0039] With the above structure, the beverage machine can drain the residual water in the output pipe 34 without the need for an additional drain pump, especially the residual water between the switching component 50 and the beverage outlet 33.

[0040] The upper piston 22 and / or the lower piston 23 can be driven in the following ways: either the upper piston 22 is driven alone, or the lower piston 23 is driven alone, or both the upper piston 22 and the lower piston 23 are driven. When the upper piston 22 and the lower piston 23 move in opposite directions, the volume of the brewing chamber increases; when the upper piston 22 and the lower piston 23 move towards each other, the volume of the brewing chamber decreases.

[0041] In this embodiment, the upper piston 22 is fixed relative to an external fixed reference point. The brewing cylinder 21 drives the lower piston 23 to move along the axial direction of the brewing cylinder 21 toward or away from the upper piston 22. That is, the brewing cylinder 21 and the lower piston 23 are movable relative to the external fixed reference point, thereby reducing or increasing the volume of the brewing chamber. After the liquid flows back into the brewing chamber, the pressure storage valve 40 maintains the first connection mode. When the switching component 50 connects the input channel 503 and the first output channel 501, the volume of the brewing chamber decreases, and the liquid in the brewing chamber and the output pipe 34 is squeezed to the beverage outlet 33 and discharged from the beverage outlet 33 to the water storage pan 36. When the switching component 50 connects the input channel 503 and the second output channel 502, the volume of the brewing chamber decreases, and the liquid in the brewing chamber and the output pipe 34 is squeezed to the second waste pipe 552 and discharged from the second waste pipe 552 to the water storage pan 36.

[0042] Specifically, the brewing cylinder 21 drives the lower piston 23 upward until the distance between the lower piston 23 and the upper piston 22 reaches its minimum limit, resulting in the minimum volume of the brewing chamber. The brewing cylinder 21 then drives the lower piston 23 downward until the upper piston 22 remains sealed to the brewing cylinder 21, maximizing the volume of the brewing chamber. As the brewing cylinder 21 continues to move downward, it separates from the upper piston 22 and can then continue moving downward to return to its initial powder-receiving state.

[0043] The liquid that flows back into the brewing chamber can be discharged in several ways when the volume of the brewing chamber decreases. One way is to connect the first waste pipe 551 and the brewing chamber with the three-way valve 32, so that the liquid in the brewing chamber is discharged into the water storage pan 36 through the first waste pipe 551. Another way is to control the pressure storage valve 40 to be in the first connection mode with the flow direction regulating component 45, so that the liquid in the brewing chamber is discharged into the water storage pan 36 through the pressure storage valve 40 and the switching component 50. Alternatively, the above two discharge methods can be combined, that is, the liquid in the brewing chamber is discharged bidirectionally from the pressure storage valve 40 and the three-way valve 32 at the same time, so as to speed up the emptying and improve the efficiency of the beverage machine.

[0044] The liquid discharge process is coordinated with the piston movement to ensure thorough and precise waste removal. Combined with the aforementioned back-suction action, a complete "suction-discharge" emptying mode is formed, effectively reducing the risk of cross-contamination and improving hygienic reliability. This design eliminates the need for a separate emptying pump, relying on the brewer's own structure to first draw water remaining in the pipes into the brewing chamber, and then discharge it from the brewing chamber through the first waste discharge pipe 551 and / or the second waste discharge pipe 552, further simplifying the pipe layout and improving system integration.

[0045] In one specific embodiment, the switching component 50 includes a first three-way valve 54, which is configured as a three-way solenoid valve. The first three-way valve 54 can selectively connect the input channel 503 to the beverage outlet 33 or connect the input channel 503 to the water storage tray 36. When the first three-way valve 54 is energized, the input channel 503 is connected to the first output channel 501; when the first three-way valve 54 is de-energized, the input channel 503 is connected to the second output channel 502.

[0046] In traditional designs, water flows unidirectionally into the brewing chamber from the inlet, and the extracted liquid exits from the beverage outlet. Cleaning often follows the same water flow direction. This unidirectional cleaning is insufficient to remove residual beverage particles or grease from the beverage outlet, especially those accumulated on the piston orifice of the brewer. Long-term accumulation can lead to pipe blockage, bacterial growth, and compromised hygiene and machine lifespan. Therefore, regular cleaning is necessary to prevent clogging. Existing rinsing methods are no longer sufficient to meet customers' needs for deep cleaning.

[0047] Continue to refer to Figures 1 to 3 as well as Figures 12 to 14The water supply pipe 31 is used to supply liquid to the brewer 20. A water supply control valve 37 / 37a is also specially installed in the water supply pipe 31. The water supply control valve 37 / 37a can selectively connect the water supply pipe 31 to the inlet end 231 or the outlet end 221, that is, the water supply control valve 37 / 37a can selectively connect the water supply pipe 31 to the lower piston 23 or the upper piston 22. The water supply control valve 37 / 37a can selectively connect the water supply pipe 31 to the inlet end 231 or the outlet end 221, realizing precise switching between the beverage extraction mode and the backwashing mode. Backwashing can be understood as the water flow direction during rinsing being opposite to the direction of the extracted beverage liquid flow. The liquid flows sequentially through the pressure storage valve 40 and the outlet end 221 before entering the brewing chamber, thus achieving backwashing of the brewer 20.

[0048] To achieve precise control, the water supply pipeline 31 includes a first water supply branch 311 and a second water supply branch 312. The first water supply branch 311 supplies water to the brewer 20 through the lower piston 23; the second water supply branch 312 supplies water to the brewer 20 through the upper piston 22. A three-way valve 32 is installed in the first water supply branch 311, allowing the cleaning water flowing from the inlet 231 to be discharged into the water storage pan 36; when the brewer 20 finishes brewing, the pressure inside the brewing chamber can also be released through the three-way valve 32.

[0049] The three-way valve 32 can be configured as a three-way solenoid valve. When the three-way solenoid valve is energized, the water supply pipe 31 is connected to the brewing chamber. When the three-way solenoid valve is de-energized, the brewing chamber is connected to the first waste discharge pipe 551.

[0050] Specifically, the first water supply branch 311 is connected to the lower piston 23 and supplies water to the brewing chamber through the water inlet 231 on the lower piston 23; the output pipe 34 is connected to the upper piston 22 and outputs the liquid generated from the brewing chamber through the drinking end 221; the second water supply branch 312 is connected to the drinking end 221 and supplies water to the brewing chamber in reverse through the drinking end 221, thereby forming a reverse rinsing path that is completely different from the first water supply branch 311.

[0051] During normal brewing, water flows from the inlet 231 to the outlet 221, penetrating the coffee grounds. The upper piston 22 is under pressure, and coffee oils and powders are easily embedded in the gaps and dead corners of the upper piston 22. During reverse rinsing, water flows in the opposite direction from the outlet 221, forming a water flow at a 180° angle to the brewing direction. This reverse water flow is opposite to the direction of residue accumulation, directly impacting the adhesion surface and using the water flow to peel the embedded coffee oils and powders from the upper piston 22.

[0052] Reference Figure 1The water supply control valve 37 is configured as a three-way valve, which controls the connection of the water supply pipeline 31 to the inlet 231 or the drinking outlet 221. Along the water supply pipeline 31 to the brewer 20, the water supply control valve 37 is located upstream of the three-way valve 32. Specifically, the input end of the water supply control valve 37 is connected to the water source 35, for example, the input end of the water supply control valve 37 is connected to the water outlet of the heater 38, and the two output ends of the water supply control valve 37 are connected to the inlet 231 and the drinking outlet 221, respectively. Reference Figure 2 and Figure 3 In one embodiment, the water supply control valve 37a includes a first valve 371 disposed on the first water supply branch 311 and a second valve 372 disposed on the second water supply branch 312. The first valve 371 can selectively control the first water supply branch 311 to supply water to the brewer 20 through the water inlet 231; the second valve 372 can selectively control the second water supply branch 312 to supply water to the brewer 20 through the drinking outlet 221.

[0053] The first valve 371 is configured as a three-way valve, including a pressure relief port leading to the water storage tray 36, so that the rinsing liquid discharged from the water inlet 231 can be smoothly guided to the water storage tray 36 through the pressure relief port in the reverse rinsing mode. The second valve 372 is configured as a two-way valve, used to control whether the second water supply branch 312 supplies water to the brewer 20 through the drinking outlet 221. The combined use of the first valve 371 and the second valve 372 ensures that the equipment can flexibly realize the beverage extraction mode, the forward rinsing mode, and the reverse rinsing mode. In this embodiment, the first valve 371 is the three-way valve 32.

[0054] Reference Figure 2 and Figure 3 The pressure storage valve 40 also includes a third delivery port 413, which is connected to the second delivery port 412. The water supply line 31 is connected to the drinking end 221 through the third delivery port 413. In the beverage extraction mode, the beverage prepared by the brewer 20 passes through the first delivery port 411 and the second delivery port 412 in sequence; in the reverse rinsing mode, the water in the water supply line 31 passes through the third delivery port 413 and the first delivery port 411 in sequence.

[0055] The third delivery port 413 is connected to the second water supply branch 312. The third delivery port 413 is connected to the second delivery port 412, and the second valve 372 is used to control the flow of liquid from the second water supply branch 312 to the third delivery port 413, so that the second water supply branch 312 can be connected to the third delivery port 413 to supply water to the drinking end 221 through the first delivery port 411.

[0056] The beverage machine includes a beverage extraction mode and a backwashing mode. In beverage extraction mode, the water supply control valve 37 / 37a connects the water supply pipe 31 and the water inlet 231 (or the lower piston 23). The beverage prepared by the brewer 20 flows sequentially through the beverage outlet 221 (or the upper piston 22), the pressure storage valve 40, and the output pipe 34, and is finally output to the beverage outlet 33. In backwashing mode, the water supply control valve 37 / 37a connects the water supply pipe 31 and the beverage outlet 221 (or the upper piston 22). The liquid in the water supply pipe 31 flows sequentially through the pressure storage valve 40, the beverage outlet 221 (or the upper piston 22), and is discharged from the water inlet 231 (or the lower piston 23). This effectively achieves backwashing of the filter and pipes inside the brewer 20, resulting in more thorough cleaning and significantly improving the hygiene and long-term operational stability of the equipment.

[0057] This embodiment achieves beverage extraction and efficient backwashing capabilities through structural optimization and precise water circuit control of the overall beverage machine. The overall equipment is compact, reliable, flexible, and easy to operate, improving the user experience while reducing equipment maintenance costs, demonstrating significant practical application effects.

[0058] In the first connection mode, the pressure storage valve 40 of this application can realize continuous unobstructed low-pressure extraction mode, backwashing mode, and venting mode. In the second connection mode, the pressure storage valve 40 can realize pressurized extraction mode and forward rinsing mode. Among them, the low-pressure extraction mode and the pressurized extraction mode are collectively referred to as beverage extraction mode, and the backwashing mode and the forward rinsing mode are collectively referred to as rinsing mode.

[0059] The aforementioned structure of this application achieves the dual goals of efficient extraction and thorough cleaning, while effectively preventing residual liquid from contaminating subsequent beverages. By controlling the pressure storage valve 40, water can flow backward from the output pipe 34 into the brewing chamber in reverse rinsing mode, impacting the filter screen and piston hole walls to remove accumulated coffee grounds and oils. Combined with the coordinated control of the brewer 20 and the switching component 50, in drain mode, residual water in the pipes is completely drained into the water storage tray, ensuring no residual water mixes into the beverage during the next preparation. Through this design, the beverage machine automatically enters a drain state after each preparation or cleaning cycle, ensuring no water residue remains in the output pipes.

[0060] Reference Figures 4 to 6 A pressure-accumulating seal 44 is provided between the first delivery port 411 and the second delivery port 412. The pressure-accumulating seal 44 blocks the connection between the first delivery port 411 and the second delivery port 412 under a preset pressure. In the reverse flushing mode, the pressure-accumulating seal 44 is moved by force to connect the third delivery port 413 and the first delivery port 411.

[0061] Furthermore, in the forward rinsing mode, the water supply control valve 37 / 37a connects the water supply pipe 31 and the water inlet 231, and the liquid rinsing the brewer 20 passes sequentially through the dispensing end 221 and the pressure storage valve 40. In the forward rinsing mode, the first delivery port 411 and the third delivery port 413 of the pressure storage valve 40 are disconnected, that is, the flow direction regulating element 45 is in the closed state; in the reverse rinsing mode, the flow direction regulating element 45 is operably connected to the first delivery port 411 and the third delivery port 413, that is, the flow direction regulating element 45 is in the open state.

[0062] refer to Figures 1 to 3 As shown, one embodiment of this utility model provides a water circuit system for a beverage machine. This water circuit system includes a brewer 20, a first water supply branch 311, a second water supply branch 312, a three-way valve 32, a pressure storage valve 40, a beverage outlet 33, and an output pipe 34. The overall structure is compact and feature-rich, effectively realizing beverage extraction and multi-mode rinsing of the brewer 20, thereby improving the performance and user experience of the beverage machine.

[0063] Specifically, the brewer 20 has a water inlet 231 and a drinking outlet 221 positioned opposite each other, ensuring that water flows steadily and unidirectionally through the brewing chamber during beverage preparation or cleaning, avoiding chaotic liquid flow. One end of the first water supply branch 311 is connected to the water source 35, and the other end is connected to the water inlet 231. A three-way valve 32 is installed on the first water supply branch 311, which can release pressure within the brewer 20 and discharge liquid from the brewer 20, ensuring safe system operation. One end of the second water supply branch 312 is connected to the water source 35, and the other end is connected to the drinking outlet 221. A pressure storage valve 40 is installed on the second water supply branch 312 and connected to the drinking outlet 221. The other end of the second water supply branch 312 is connected to the drinking outlet 221 via the pressure storage valve 40. One end of the output pipe 34 is connected to the beverage outlet 33, and the other end of the output pipe 34 is connected to the beverage outlet 221 through the pressure storage valve 40, so that the beverage extracted by the brewer 20 can flow to the beverage outlet 33 through the pressure storage valve 40.

[0064] In practical applications, water from water source 35 flows into brewer 20 via the first water supply branch 311 to achieve either the beverage extraction mode or the forward rinsing mode. The flow direction of the liquid in brewer 20 remains consistent in both modes. Water from water source 35 flows into brewer 20 via the second water supply branch 312 to achieve the reverse rinsing mode. The flow direction of the liquid in brewer 20 is opposite to that in the forward rinsing mode and the reverse rinsing mode. The beverage machine also features a bidirectional rinsing mode, which effectively removes residual beverage particles from the brewing chamber, preventing long-term accumulation that could lead to equipment blockage or filter malfunction, thus significantly improving the hygiene performance of the beverage machine.

[0065] Through the above structural layout and functional settings, the water system of this embodiment can flexibly realize the extraction of beverages and bidirectional rinsing, which improves the overall performance of the beverage machine, meets the diverse drinking needs of users, and enhances the convenience and hygiene of the equipment.

[0066] In one embodiment, the water inlet 231 is located on the lower piston 23, while the drinking outlet 221 is located on the upper piston 22. This arrangement of opposite inlet and outlet positions ensures that the liquid flows steadily in one direction within the brewing chamber, preventing chaotic flow during extraction and rinsing, thus effectively guaranteeing extraction and rinsing results. Of course, in other possible embodiments, the water inlet 231 can also be located on the upper piston 22, while the drinking outlet 221 is located on the lower piston 23.

[0067] The pressure storage valve 40 includes a first delivery port 411 and a second delivery port 412. The first delivery port 411 is connected to the drinking end 221, and the second delivery port 412 is connected to the output pipeline 34. A pressure accumulating seal 44 is provided between the first delivery port 411 and the second delivery port 412. The pressure accumulating seal 44 blocks the connection between the first delivery port 411 and the second delivery port 412 under a preset pressure. When the pressure inside the brewer 20 reaches the set pressure, the pressure accumulating seal 44 is opened, forming a stable pressurized extraction mode.

[0068] Furthermore, when the pressure accumulator seal 44 is opened by non-hydraulic control, the first delivery port 411 and the second delivery port 412 are connected, allowing the beverage in the brewer 20 to be directly output through the first delivery port 411 and the second delivery port 412, thereby achieving a continuous and unobstructed low-pressure extraction mode. The beverage machine, based on only one type of brewer, can provide coffee beverages with different tastes and flavors.

[0069] Reference Figure 2 , Figures 4 to 6 In one embodiment, the pressure storage valve 40 further includes a third delivery port 413, which is connected to the second delivery port 412, and the second water supply branch 312 is connected to the third delivery port 413. In the backwashing mode, the pressure accumulator seal 44 is moved under force to connect the third delivery port 413 and the first delivery port 411. Furthermore, in the backwashing mode, the second water supply branch 312 supplies water to the brewer 20 through the first delivery port 411, backwashing residual beverage particles in the brewing chamber relative to the direction of the extracted liquid, thus improving the cleaning effect. By operating the pressure accumulator seal 44 to connect the third delivery port 413 and the first delivery port 411, either the backwashing mode or the low-pressure extraction mode can be achieved. The pressure storage valve 40 can achieve different extraction modes for beverages and also enables backwashing, making the water system cost-effective and versatile.

[0070] In one embodiment, the pressure storage valve 40 further includes a flow direction regulating element 45, which is operably switchable between an open state and a closed state. In beverage extraction mode, when the flow direction regulating element 45 is in the open state, the liquid produced in the brewing chamber is a first beverage (such as a light beverage extracted under low pressure, also referred to as a low-pressure beverage in this specific embodiment); when the flow direction regulating element 45 is in the closed state, the liquid produced in the brewing chamber is a second beverage (such as a rich beverage extracted under high pressure, also referred to as a pressurized beverage in this specific embodiment). Thus, by adjusting the state of the flow direction regulating element 45, the pressure in the brewing chamber can be controlled, thereby obtaining beverages with different flavors and textures. Users can select different functions according to their actual needs by adjusting the movement of the flow direction regulating element 45, significantly improving the flexibility of the beverage machine and the user experience.

[0071] Furthermore, when rinsing the brewer 20 is required, in the forward rinsing mode, the flow direction regulating member 45 is not controlled to move, that is, the flow direction regulating member 45 is in the closed state, realizing forward rinsing of the brewer 20 with the fluid flow direction being the same as the extraction liquid direction; in the reverse rinsing mode, the flow direction regulating member 45 is controlled to move, that is, the flow direction regulating member 45 is in the open state, realizing reverse rinsing of the brewer 20 with the fluid flow direction being opposite to the extraction liquid direction. The following uses coffee extraction as an example to describe the pressure storage valve 40 of this application in detail.

[0072] Reference Figures 4 to 6 The pressure storage valve 40 includes a first connection port 415 and a pressure storage seal 44. The pressure storage seal 44 closes the first connection port 415 under a preset pressure storage pressure to block the connection between the first delivery port 411 and the second delivery port 412. The flow direction regulating member 45 can operably push the pressure storage seal 44 to open the first connection port 415 so that the pressure storage valve 40 can achieve the first connection mode.

[0073] Specifically, the pressure accumulator valve 40 includes a valve body 401, a flow direction regulating member 45, and a pressure accumulator seal 44. The valve body 401 has a first channel 421 and a second channel 422. A first delivery port 411 is located in the first channel 421, and the second channel 422 has a first connecting port 415, through which the first channel 421 and the second channel 422 are connected. The flow direction regulating member 45 is movably disposed within the valve body 401, for example, it can be controllably moved in a specific direction. The pressure accumulator seal 44 is disposed within the second channel 422 and is used to open or close the first connecting port 415 to control the fluid communication state between the first channel 421 and the second channel 422.

[0074] In this design, the pressure accumulator seal 44 is preferably a spherical pressure accumulator seal 44, such as a glass ball, to ensure sealing effect and smooth movement.

[0075] The pressure storage valve 40 also includes an elastic element 47 and a first motor 48. The elastic element 47 is preferably a compression spring, which can provide stable pre-pressure.

[0076] To achieve precise control over the opening and closing state of the accumulator seal 44, an elastic element 47 is disposed within the second channel 422. Specifically, refer to... Figure 4 The elastic element 47 presses against the pressure-accumulating seal 44 along the first direction, keeping the pressure-accumulating seal 44 closed at the first communication port 415. The pressure exerted by the elastic element 47 on the pressure-accumulating seal 44 is continuous to ensure that no fluid communication occurs between the first channel 421 and the second channel 422 until the set pressure is reached. When the liquid pressure inside the brewer 20 from the first channel 421 gradually increases and eventually exceeds the pre-pressure applied by the elastic element 47, the pressure-accumulating seal 44 is pushed open by the liquid pressure, thereby opening the first communication port 415 and realizing the second communication mode. The liquid flows smoothly from the first channel 421 to the second channel 422, forming a traditional pressure-accumulating extraction process to prepare a rich, oily coffee beverage (such as espresso).

[0077] To meet the diverse taste and flavor preferences of users for coffee beverages, the flow direction regulating member 45 acts on the pressure-accumulating seal member 44 in a second direction. Driven by the first motor 48, the flow direction regulating member 45 acts on the pressure-accumulating seal member 44 in the second direction, causing the pressure-accumulating seal member 44 to overcome the resistance of the elastic element 47 and move in the second direction to open the first connection port 415. The flow direction regulating member 45 operably pushes the pressure-accumulating seal member 44 in the second direction, causing the pressure-accumulating seal member 44 to overcome the resistance of the elastic element 47 and move in the second direction, thereby actively opening the first connection port 415 and achieving direct fluid communication between the first channel 421 and the second channel 422, i.e., realizing the first communication method. (Refer to...) Figure 5 Since the gap formed after the pressure accumulator seal 44 is pushed open by the flow regulating member 45 remains stable, the brewer 20 can achieve continuous fluid output without accumulating pressure. Based on the same brewer 20, a low-pressure extraction process is achieved, thus obtaining another coffee beverage.

[0078] In the above scheme, it is clearly stated that the second direction is opposite to the first direction. Further explanation: the "first direction" specifically refers to the direction in which the elastic element 47 applies force to close the first communication port 415 with the pressure-accumulating seal 44, for example... Figure 4 As indicated by arrow F. The "second direction" is the opposite, specifically the direction in which the flow regulating member 45 pushes the accumulator seal 44 to open the first communication port 415.

[0079] Through the above structure, the pressure storage valve 40 of this embodiment realizes the free switching between pressurized coffee and low-pressure coffee extraction modes in a simple and efficient manner. Users can flexibly choose coffee drinks with different tastes and flavors according to their actual needs, thereby significantly improving the applicability and user experience of the beverage machine. Moreover, the overall structure is compact, effectively reducing the size and manufacturing cost of the equipment.

[0080] Based on the aforementioned pressure storage valve 40, to further improve the accuracy and stability of the motion control of the flow direction regulating member 45, this application also specifically provides a third channel 423 within the valve body 401. The flow direction regulating member 45 is disposed within this third channel 423. The flow direction regulating member 45 can be operably moved linearly along the third channel 423, thereby precisely achieving the pushing action on the pressure accumulating seal member 44.

[0081] The accumulator seal 44 has a closed side 441 that seals the first connection port 415. The flow direction regulating member 45 presses against the closed side 441 to open the first connection port 415, thereby connecting the first channel 421 and the second channel 422. The flow direction regulating member 45 opens the first connection port 415 by pressing against the closed side 441, ensuring reliable connection between the first channel 421 and the second channel 422. The entire pressure accumulator valve 40 has a simple structure, and the flow direction regulating member 45 is easy to control.

[0082] Of course, in other feasible solutions, the flow direction regulating member 45 can also drive the pressure accumulator seal 44 to move on the opposite side of the closed side 441. For example, the pressure accumulator seal 44 can be configured to be fixed relative to the flow direction regulating member 45, and the movement of the flow direction regulating member 45 can simultaneously drive the pressure accumulator seal 44.

[0083] To further optimize the sealing effect of the pressure accumulator valve 40 and ensure smooth fluid flow, the embodiments of this application have specially designed the structure and dimensions of the pressure accumulator seal 44. Specifically, the closed side 441 is preferably constructed with a spherical structure, and the pressure accumulator seal 44 is preferably spherical in shape, such as a glass ball, to obtain good sealing performance and low-friction movement effect, ensuring that the pressure accumulator seal 44 can be easily pushed and moved stably by the flow regulating member 45.

[0084] Furthermore, to ensure unobstructed fluid flow, the diameter of the second channel 422 is larger than the diameter of the closed side 441 (i.e., the spherical structure), and the diameter of the closed side 441 is larger than the diameter of the first connecting port 415. This strict and precise dimensional design ensures that, on the one hand, the pressure-accumulating seal 44, when not pushed open, precisely abuts against the first connecting port 415, achieving a tight and reliable seal and preventing fluid leakage; on the other hand, when the flow-adjusting component 45 pushes the pressure-accumulating seal 44 open, because the diameter of the second channel 422 is larger than that of the pressure-accumulating seal 44, the pressure-accumulating seal 44 can be smoothly pushed to the vicinity of the inner wall of the second channel 422, forming a sufficient fluid channel gap. This avoids partial blockage or insufficient gap in the channel during the opening process of the pressure-accumulating seal 44, ensuring a smooth and continuous flow of coffee liquid and other fluids from the first channel 421 to the second channel 422, preventing fluid discontinuity due to unstable flow during dispensing, and significantly improving the visual effect and user experience of beverage extraction.

[0085] Through the optimized design of the above-mentioned structural dimensions, the embodiments of this application ensure a balance between the sealing performance and fluid flow of the pressure storage valve 40, thereby improving the overall stability of equipment operation and the quality of beverage output, achieving the best performance.

[0086] To optimize the structural layout and ensure smoother and more reliable movement of the flow direction regulating component 45, the third channel 423 extends in the same direction as the second channel 422. This arrangement ensures that the movement path of the flow direction regulating component 45 is consistent with the direction of the second channel 422, thereby minimizing the lateral forces on the flow direction regulating component 45 and the pressure accumulator seal 44, extending the service life of the components, significantly improving the smoothness of the movement of the flow direction regulating component 45, and resulting in a more compact overall structural layout.

[0087] Furthermore, the first channel 421 is positioned between the third channel 423 and the second channel 422. A first motor 48, preferably a stepper motor, is located at the end of the third channel 423 furthest from the pressure-accumulating seal 44. The first motor 48 precisely drives the flow direction regulating component 45 to move axially along the third channel 423 via an electronic control system. This achieves precise pushing and control of the pressure-accumulating seal 44 by the flow direction regulating component 45, ensuring accurate positioning of the flow direction regulating component 45 when opening and closing the pressure-accumulating seal 44, and avoiding problems such as poor sealing effect or unstable flow due to positional errors. In this embodiment, the flow direction regulating component 45 is specifically constructed as a valve core, facilitating its movement within the third channel 423 in cooperation with the first motor 48.

[0088] Furthermore, the extending direction of the first channel 421 intersects the extending direction of the second channel 422, preferably perpendicularly at 90 degrees. The first channel 421 and the second channel 422 are integrally formed. This integral formation facilitates the manufacturing of the pressure accumulator valve 40 and reduces its cost. The intersection of the extending directions of the first channel 421 and the second channel 422 facilitates connection to the delivery pipe and optimizes the installation space of the pressure accumulator valve 40.

[0089] To ensure the safe and reliable movement of the flow direction regulating component 45, a first step portion 425 is further provided within the third channel 423, and a second step portion 452 is correspondingly provided on the outer periphery of the flow direction regulating component 45. During the process of the flow direction regulating component 45 moving to press against the pressure accumulating seal 44 to open the first connecting port 415, when the flow direction regulating component 45 reaches a set limit position, the second step portion 452 abuts against the first step portion 425, effectively limiting the limit position of the flow direction regulating component 45. This prevents excessive displacement of the flow direction regulating component 45 from damaging the pressure accumulating seal 44 or the elastic element 47, effectively protecting the structural integrity of the flow direction regulating component 45 and related components, and significantly improving the reliability and durability of the equipment.

[0090] To further enhance the stability of the flow direction regulating component 45 and the ease of installation, the valve body 401 is also provided with a first groove 426 that radially penetrates the third channel 423. A first sealing ring 431 and a first retaining ring 432 are sequentially fitted onto the flow direction regulating component 45 along the first direction to ensure the sealing performance within the third channel 423 and the smooth movement of the flow direction regulating component 45. A first opening clamp 433 is connected within the first groove 426. The first opening clamp 433 is engaged with the flow direction regulating component 45 and located on the side of the first retaining ring 432 away from the first sealing ring 431. The first opening clamp 433 effectively limits the first retaining ring 432 through the first groove 426, thereby further fixing the axial position of the flow direction regulating component 45 within the third channel 423, preventing the flow direction regulating component 45 from accidentally detaching or loosening, and effectively improving the stability, reliability, and maintainability of the structure.

[0091] Furthermore, the first sealing ring 431 fitted onto the flow direction regulating member 45 can be an O-ring. A third step portion 427 is also provided within the third channel 423, located between the first step portion 425 and the first slot 426. The first sealing ring 431 is confined between the third step portion 427 and the first retaining ring 432, ensuring that the first sealing ring 431 will not shift regardless of whether the flow direction regulating member 45 moves in the first or second direction. The first sealing ring 431 further ensures the sealing of the flow direction regulating member 45, preventing liquid from entering the side of the flow direction regulating member 45 connected to the first motor 48.

[0092] In summary, through the detailed design of the third channel 423 and the motion structure of the flow direction regulating component 45, the embodiment of this application achieves precise positional control of the flow direction regulating component 45 and the pressure accumulating seal 44, resulting in a more compact and reliable structure. This further improves the operational stability and accuracy of the pressure accumulating valve 40, effectively extends the service life of the equipment, and significantly optimizes the overall user experience.

[0093] To further meet users' personalized needs for coffee extraction pressure, this embodiment adds a pressure adjustment structure to the control system, allowing for precise adjustment and control of the accumulated pressure within the brewer 20. Specifically, the pressure storage valve 40 further includes a pressure adjustment knob 46, which extends into the second channel 422 and is operably movable relative to the second channel 422. The two ends of the elastic element 47 abut against the pressure adjustment knob 46 and the pressure storage seal 44, respectively. By changing the position of the pressure adjustment knob 46, the deformation of the elastic element 47 can be adjusted, thereby precisely changing the pressure exerted by the elastic element 47 on the pressure storage seal 44, achieving adjustable accumulated pressure.

[0094] During operation, users can precisely adjust the accumulated pressure by simply operating the pressure adjustment knob 46 to increase or decrease the pre-pressure of the elastic element 47 according to their personal taste preferences or desired coffee quality. When a user desires a strong, oily coffee, they can adjust the pressure adjustment knob 46 to increase the pre-pressure of the elastic element 47, causing the pressure-accumulating seal 44 to open under higher pressure, thus extending the coffee's extraction time and enhancing its flavor. When a user desires a milder, less oily coffee, they can decrease the pre-pressure, allowing the pressure-accumulating seal 44 to open under lower pressure, resulting in a milder coffee. Alternatively, the flow direction adjustment element 45 can actively open the pressure-accumulating seal 44 to achieve a low-pressure continuous extraction mode, yielding an even milder coffee.

[0095] In addition, to facilitate the effective operation of the pressure regulating structure, the second channel 422 is provided with a second delivery port 412. The second delivery port 412 is connected to the first channel 421 through the first connecting port 415, ensuring that the fluid can flow smoothly when the pressure accumulator seal 44 is open, and ensuring the stable output of coffee liquid under different pressure settings.

[0096] Through the above-described pressure regulation structure design, the embodiments of this application not only effectively improve the pressure control accuracy and functional flexibility of the pressure storage valve 40, but also meet the personalized coffee taste needs of different users, greatly enhancing the user experience and market competitiveness of the beverage machine.

[0097] Reference Figure 6In another embodiment, the pressure storage valve 40 features a specially optimized design in the structure of the second channel 422 to allow for flexible switching between coffee extraction and cleaning functions. Specifically, the second channel 422 is provided with a second delivery port 412 and a third delivery port 413; the second delivery port 412 and the third delivery port 413 are spaced apart along the extension direction or circumference of the second channel 422 to meet different fluid delivery needs. The second delivery port 412 is connected to the beverage outlet 33 to ensure smooth output of coffee beverage flowing from the first channel 421 into the user's cup, guaranteeing a stable and continuous beverage output. The third delivery port 413 is connected to the second water supply branch 312 to achieve reverse cleaning of the valve body 401 and the corresponding brewer 20 piping. Alternatively, the second delivery port 412 can be connected to the second water supply branch 312, while the third delivery port 413 can be connected to the beverage outlet 33. In practical applications, the connections of the second delivery port 412 and the third delivery port 413 can be flexibly interchanged according to actual needs. In this embodiment, after the third delivery port 413 is connected to the second water supply branch 312, the cleaning water can flow into the brewer 20 through the second channel 422, the first connecting port 415 and the first channel 421 through an appropriate control mechanism. This makes the flow direction of the cleaning water opposite to the flow direction of the beverage output, thereby effectively and thoroughly rinsing the internal structure of the brewer 20 and the delivery channel, especially achieving efficient cleaning of the filter screen of the upper piston 22 inside the brewer 20, and significantly improving the internal hygiene of the equipment.

[0098] Through the innovative design of the second channel 422 with multiple openings, the pressure storage valve 40 can provide different connection openings based on different functions in the water system, which simplifies the design of the water system.

[0099] exist Figure 1 The water system in the middle adopts Figure 4 and Figure 5In the brewer 20, the pressure accumulator valve 40 and the pressure accumulator seal 44 are opened by the flow regulating member 45 to open the first connection port 415. In beverage extraction mode, low-pressure extraction is achieved, and the low-pressure beverage flows out from the second delivery port 412. In the brewer 20, the pressure accumulator seal 44 is opened by the liquid pressure within the brewer 20 to open the first connection port 415, enabling pressurized extraction in beverage extraction mode, with the pressurized beverage flowing out from the second delivery port 412. In reverse rinsing mode, the pressure accumulator seal 44 is opened by the flow regulating member 45 to open the first connection port 415, allowing for reverse rinsing of the brewer 20. In evacuation mode, the pressure accumulator seal 44 is opened by the flow regulating member 45 to open the first connection port 415, allowing liquid to flow back into the brewing chamber as the volume of the brewing chamber increases. In the case of only setting the second delivery port 412, a three-way structure can be set downstream of the second delivery port 412 along the direction of the extracted liquid. The second water supply branch 312 is connected to the three-way structure, and the flow path is switched through the three-way structure to allow the water to flow from the second delivery port 412 to the first delivery port 411.

[0100] exist Figures 2 to 3 The water system in the middle adopts Figure 6 The pressure storage valve 40 allows both pressurized and low-pressure beverages to flow out from the second delivery port 412; in backwash mode, water flows in from the third delivery port 413. There is no need for a T-junction downstream of the second delivery port 412. In low-pressure beverage output, backwash mode, and drain mode, the pressure storage seal 44 needs to be opened by the flow regulating member 45 to open the first connection port 415.

[0101] Reference Figures 7 to 11 In other embodiments, the pressure storage valve 40 includes a first connection port 415, a second connection port 416, and a pressure storage seal 44. The pressure storage seal 44 closes the first connection port 415 under a preset pressure to block the connection between the first delivery port 411 and the second delivery port 412. The flow direction regulating member 45 operably opens the second connection port 416 so that the pressure storage valve 40 achieves a first connection mode.

[0102] Specifically, the pressure storage valve 40 includes a valve body 401, a flow direction regulating element 45, a pressure accumulating seal 44, and a first motor 48. The valve body 401 contains three interconnected channels: a second channel 422, a first channel 421, and a third channel 423. The first channel 421 has a first delivery port 411, the second channel 422 has a first connecting port 415 connecting to the first channel 421, and the third channel 423 has a second connecting port 416 connecting to the first channel 421. The three channels are connected through specific connecting ports, forming a defined internal fluid path. The flow direction regulating element 45 is movably disposed within the third channel 423. The first motor 48 drives the flow direction regulating element 45 to move, opening or closing the second connecting port 416. By selectively controlling the opening and closing state of the second connecting port 416, the fluid output channel is changed, achieving different functions.

[0103] Optionally, the flow direction regulating component 45 can be operably switched between an on and off state. In beverage extraction mode, when the flow direction regulating component 45 is in the on state, the liquid produced in the brewing chamber is the first beverage (such as a light beverage extracted under low pressure); when the flow direction regulating component 45 is in the off state, the liquid produced in the brewing chamber is the second beverage (such as a rich beverage extracted under high pressure). In this way, by adjusting the state of the flow direction regulating component 45, the pressure in the brewing chamber can be controlled, thereby obtaining beverages with different flavors and textures. Users can select different functions according to their actual needs by adjusting the movement of the flow direction regulating component 45, significantly improving the flexibility of the beverage machine and the user experience.

[0104] The pressure accumulator seal 44 is disposed within the second channel 422 and seals the first communication port 415 under a preset pressure. The specific arrangement of the pressure accumulator seal 44, the elastic element 47, and the pressure adjustment knob 46 is the same as in the above embodiment, and will not be repeated here.

[0105] Unlike the above-described implementation method, referring to Figure 8 The flow direction adjusting member 45 operably opens the second communication port 416 to connect the first channel 421 and the third channel 423; or, refer to Figure 7 The flow direction regulating member 45 can operably close the second connection port 416 to disconnect the first channel 421 and the third channel 423. During beverage brewing, opening and closing the second connection port 416 allows switching between different beverage preparation modes, such as pressurized beverage preparation under pressure conditions output from the second channel 422, and low-pressure beverage preparation under low-pressure conditions output from the third channel 423. During backwashing, opening and closing the second connection port 416 allows switching between different functions, such as pressurized beverage preparation under pressure conditions output from the second channel 422, and backwashing with reverse fluid flow from the third channel 423 to the first channel 421.

[0106] In this embodiment, the flow direction regulating member 45 can open or close the second communication port 416 through axial reciprocating motion. "Cut off" refers to the state in which the flow direction regulating member 45 completely seals and isolates the first channel 421 and the third channel 423 to prevent the liquid in the first channel 421 from flowing out through the third channel 423 and affecting the quality of the pressurized beverage.

[0107] Reference Figure 7 When the flow direction regulating component 45 closes the second connection port 416, i.e., in the second connection mode, the brewer 20 in the beverage machine continuously outputs liquid flow to the first channel 421 until the pressure of the liquid flow exceeds the elastic force on the pressure accumulator seal 44. The pressure accumulator seal 44 is automatically pushed open by the pressure of the liquid flow, realizing the traditional pressure accumulator extraction mode (i.e., continuous pressure extraction with resistance). In addition, in the forward rinsing mode, the flow direction regulating component 45 is not controlled to move, i.e., the flow direction regulating component 45 is in the closed state, realizing forward rinsing of the brewer 20 with the fluid flow direction being the same as the extraction liquid direction.

[0108] Reference Figure 8 After the flow direction regulating component 45 opens the second connection port 416, i.e., in the first connection mode, the liquid flow from the brewer 20 to the first channel 421 in the beverage machine can be directly output through the third channel 423, achieving an unobstructed low-pressure extraction mode. Additionally, in the reverse rinsing mode, the flow direction regulating component 45 is controlled to move, i.e., the flow direction regulating component 45 is in the open state, achieving reverse rinsing of the brewer 20 with the fluid flow direction opposite to the extraction liquid direction. In the evacuation mode, the flow direction regulating component 45 is controlled to move, i.e., the flow direction regulating component 45 is in the open state, cooperating with the brewer 20 to increase the volume of the brewing chamber. The liquid in the pipeline between the beverage outlet 33 and the upper piston 22 flows back into the brewing chamber through the pressure storage valve 40; the brewer 20 decreases the volume of the brewing chamber, and the liquid in the brewing chamber is discharged into the water storage tray 36.

[0109] Based on the pressure storage valve 40 provided in this embodiment, the beverage machine can select to make pressurized or low-pressure beverages using the same brewer 20, thereby providing beverages with different tastes and flavors (such as coffees with different flavors). In addition, the pressure storage valve 40 can be used to rinse the brewer 20 in different directions, significantly improving the hygiene inside the beverage machine. It can also drain the pipeline after rinsing to ensure the quality of the next beverage preparation.

[0110] Furthermore, the pressure storage valve 40 provided in this embodiment is a single valve, eliminating the need for multiple valves in the beverage machine to control pressurized extraction and low-pressure extraction, thereby reducing the machine's size and cost. The pressure storage valve 40 in this embodiment allows users to select different flavored beverages according to their needs, providing a choice of different tastes and enhancing the user experience.

[0111] Preferably, the second channel 422 and the third channel 423 extend in the same direction, and the flow direction adjustment member 45 can be operatively moved within the third channel 423. For example, the flow direction adjustment member 45 can perform stable reciprocating motion along the axial direction of the third channel 423 to ensure the reliability and smoothness of the flow direction adjustment member 45's operation.

[0112] Continue to refer to Figure 7 The first channel 421 is located between the second channel 422 and the third channel 423, and the extension direction of the first channel 421 intersects the extension direction of the second channel 422. In this embodiment, the extension directions of the first channel 421 and the second channel 422 form a roughly "T"-shaped spatial structure layout, which effectively improves the utilization efficiency of the internal space of the valve body 401 and has a reasonable layout. The first channel 421 can be used to connect to the liquid outlet of the brewer 20 to receive the liquid generated by the brewer 20, while the third channel 423 is equipped with a flow direction regulating component 45 and can be used to connect to the beverage outlet 33 and / or the water supply pipe 31, thereby facilitating the pipe connections in the beverage machine.

[0113] Reference Figure 7 and Figure 8 A first motor 48 is provided at the end of the third channel 423 away from the second connecting port 416. In this embodiment, a stepper motor is preferred. The stepper motor drives the flow direction adjustment component 45 to move through its precise axial movement. The first motor 48 drives the flow direction adjustment component 45 to move to open or close the second connecting port 416, so as to precisely control the opening and closing state of the second connecting port 416 and ensure the accuracy and stability of the liquid output channel switching.

[0114] To effectively utilize the internal space of the valve body 401, the centerline of the first channel 421 intersects the rotation axis of the first motor 48, and the movement range of the flow direction regulating member 45 is limited to one side of the centerline of the first channel 421, so as to avoid spatial interference between the flow direction regulating member 45 and the first channel 421 when it moves, and the structure is more compact.

[0115] To further ensure the reliable limiting of the flow direction regulating component 45's movement, in this embodiment, a first step portion 425 is also provided within the third channel 423, and a second step portion 452 is correspondingly provided on the outer periphery of the flow direction regulating component 45. When the flow direction regulating component 45 closes the second connecting port 416, the second step portion 452 abuts against the first step portion 425 to precisely limit the extreme position of the flow direction regulating component 45's movement, preventing excessive movement of the flow direction regulating component 45 from damaging the valve body 401 or the structure of the flow direction regulating component 45, extending the service life of the equipment, and ensuring long-term reliable operation.

[0116] Reference Figure 8The second channel 422 is provided with a second conveying port 412, and the third channel 423 is also provided with a second auxiliary conveying port 412a. In this embodiment, the distance L1 from the second conveying port 412 to the first connecting port 415 is specifically designed to be greater than the distance L2 from the second auxiliary conveying port 412a to the second connecting port 416, so as to ensure that during the low-pressure extraction process (i.e., when the first connecting port 415 is closed and the second connecting port 416 is open), the liquid in the first channel 421 will automatically flow to the third channel 423.

[0117] Reference Figure 9 In one embodiment, the second delivery port 412 and the second auxiliary delivery port 412a can be connected to the outer pipe 342 to output beverages under different pressure conditions through the same outer pipe 342.

[0118] Furthermore, a first sealing ring 431 and a first retaining ring 432 are sequentially fitted onto the flow direction regulating component 45 along the direction away from the second connecting port 416 to achieve sealing and axial positioning of the flow direction regulating component 45. To further ensure that the flow direction regulating component 45 is stably held in the set position, the valve body 401 is also provided with a first slot 426 that radially penetrates the third channel 423, and a first opening clamp 433 is connected in the first slot 426. The first opening clamp 433 is engaged on the flow direction regulating component 45 and located on the side of the first retaining ring 432 away from the second connecting port 416. The limiting cooperation between the first slot 426 and the first retaining ring 432 achieves a firm and reliable axial positioning of the flow direction regulating component 45, preventing the flow direction regulating component 45 from accidentally falling out or loosening, thereby ensuring the reliability and safety of the equipment under long-term and frequent use.

[0119] Reference Figures 9 to 11 The valve body 401 of the pressure storage valve 40 adopts a modular design, consisting of a first section 402 and a second section 403 that are plugged into each other. The second channel 422 and the first channel 421 are located in the first section 402, and the third channel 423 is located in the second section 403. The modular design makes the structure of the valve body 401 simpler and clearer, which not only facilitates production and assembly, but also greatly simplifies the process of daily maintenance and repair, and reduces the overall maintenance cost of the equipment.

[0120] The third channel 423 is provided with a first step portion 425, and the flow direction adjustment component 45 includes an end sealing surface 455, which abuts against the first step portion 425 to close the second communication port 416.

[0121] Additionally, a portion of the second segment 403 is inserted into the first segment 402, and a second sealing ring 434 is provided between the first segment 402 and the second segment 403. A second slot 428 is provided on the first segment 402, and a second open clamp 435 is inserted into the second slot 428 to limit the axial movement between the first segment 402 and the second segment 403. At least one screw 436 is provided on the outer circumferential surface of the second segment 403, and the first segment 402 and the second segment 403 are fixedly connected by the screw 436, further ensuring a more reliable connection between the first segment 402 and the second segment 403.

[0122] Reference Figure 11 In one embodiment, a third conveying port 413 is further provided within the third channel 423. The second auxiliary conveying port 412a and the third conveying port 413 are spaced apart along the extension direction or circumference of the third channel 423, resulting in a reasonable and clear structural layout. The second auxiliary conveying port 412a is used to connect to the beverage outlet 33, directly outputting the extracted beverage; while the third conveying port 413 is used to connect to the second water supply branch 312, realizing the function of internal water supply cleaning of the equipment. Through this conveying opening layout structure, the pressure storage valve 40 of this embodiment cleverly achieves a high degree of integration of beverage output and equipment cleaning water supply functions within the same valve body 401, effectively reducing the need for additional piping, further optimizing the internal space layout of the equipment, and improving the overall coordination and integration of the equipment functions.

[0123] exist Figure 1 The water system in the middle adopts Figure 7 and Figure 8 The pressure storage valve 40 is located in the brewer 20. The flow direction regulating component 45 opens the second connection port 416, enabling low-pressure extraction in beverage extraction mode, with the low-pressure beverage flowing out from the second auxiliary delivery port 412a; in evacuation mode, it allows for the back-suction and discharge of residual liquid in the pipeline. The pressure accumulator seal 44 is pushed open by the liquid pressure within the brewer 20 to open the first connection port 415, enabling pressurized extraction in beverage extraction mode, with the pressurized beverage flowing out from the second delivery port 412. In backwash mode, the flow direction regulating component 45 opens the second connection port 416, allowing for backwashing of the brewer 20. With only the second delivery port 412 installed, the water system can be configured with a three-way structure downstream of the second auxiliary delivery port 412a along the direction of the extracted liquid. The second water supply branch 312 is connected to the three-way structure, and the flow path is switched through the three-way structure to allow water to flow from the second auxiliary delivery port 412a to the first delivery port 411.

[0124] exist Figures 1 to 3 The water system in the middle adopts Figure 9 and Figure 10 The pressure storage valve 40 allows pressurized and low-pressure beverages to flow out from the external pipe 342 through the second delivery port 412 and the second auxiliary delivery port 412a, respectively.

[0125] exist Figures 2 to 3 The water system in the middle adopts Figure 11 The pressure storage valve 40 is connected to the second water supply branch 312 and the third delivery port 413. The output pipeline 34 is connected to the second delivery port 412 and the second auxiliary delivery port 412a respectively, or, as... Figure 9 As shown, the output pipe 34 is connected to the external pipe 342. In the beverage extraction mode, when extracting low-pressure beverages, the flow regulator 45 opens the second connection port 416, and the low-pressure beverage flows out from the second auxiliary delivery port 412a. In the beverage extraction mode, when extracting pressurized beverages, the flow regulator 45 closes the second connection port 416, and the pressure accumulator seal 44 is pushed open by the liquid pressure within the brewer 20 to open the first connection port 415, allowing the pressurized beverage to flow out from the second delivery port 412. In the backwash mode, the flow regulator 45 opens the second connection port 416, and water flows in from the third delivery port 413. The water system does not require a T-junction downstream of the second auxiliary delivery port 412a. In low-pressure beverage output, backwash mode, and drain mode, the flow regulator 45 needs to open the second connection port 416. In the forward flushing mode, the connection between the first conveying port 411 and the third conveying port 413 is interrupted; in the reverse flushing mode, the flow direction regulating member 45 operably connects the first conveying port 411 and the third conveying port 413. In the forward flushing mode, the flow direction regulating member 45 interrupts the connection between the first conveying port 411 and the third conveying port 413, thereby maintaining a normal forward cleaning path; in the reverse flushing mode, the flow direction regulating member 45 is controlled to open, connecting the third conveying port 413 with the first conveying port 411, thus forming a reverse flushing path. In the draining mode, the flow direction regulating member 45 is controlled to open, connecting the third conveying port 413 with the first conveying port 411, forming a return path for residual liquid in the pipeline to flow back to the brewing chamber. The residual liquid can also be discharged into the water storage pan 36 from this return path after the return flow.

[0126] In summary, through careful design and optimized layout of the pressure storage valve 40 structure, a compact, fully functional, and highly reliable pressure storage valve 40 device has been achieved. The pressure storage valve 40, via a single flow direction regulating element 45, can selectively output pressurized and low-pressure beverages, and also enables forward and reverse rinsing of the brewer 20, significantly reducing equipment complexity and production costs. The modular valve body design facilitates equipment production assembly and daily maintenance, significantly improving maintainability and production efficiency. Simultaneously, through the precise driving of the flow direction regulating element 45 by the first motor 48 and the precise adjustment of the pressure storage elastic element 47, users can flexibly control the pressure storage level to meet the extraction needs of pressurized beverages with different flavors.

[0127] In the above embodiment, the brewing chamber and the first channel 421 are in fluid-obstructed communication, that is, the brewed beverage needs to overcome resistance to flow out through the beverage outlet 33. The resistance of the first channel 421 can be formed by the elastic element 47 pressing against the pressure accumulating seal 44, so that the brewed beverage can flow out through the first channel 421 under pressure, thereby making a pressurized beverage (such as espresso).

[0128] The brewing chamber and the third channel 423 are in unobstructed fluid communication. This means that the brewed beverage flows directly out of the third channel 423 without needing to overcome any resistance. The third channel 423 has no structure that creates resistance, allowing the brewed beverage to flow out without pressure, thus enabling the production of low-pressure coffee. However, low-pressure coffee is not zero-pressure extraction. Pressure exists in coffee extraction because the flow of liquid within the machine's internal tubing requires pressure. It's just that the extraction pressure for low-pressure coffee is much lower than that for pressurized coffee, which requires overcoming additional resistance. Therefore, low-pressure coffee simply means that there is no additional resistance in the coffee output tubing compared to pressurized coffee, and thus, no additional pressure is needed to overcome that resistance.

[0129] Specifically, during the production of the first beverage, the pressure in the brewing chamber is less than 4 bar; during the production of the second beverage, the pressure in the brewing chamber ranges from 6 bar to 12 bar.

[0130] In this embodiment, the specific connection modes include: a connection mode corresponding to the beverage extraction mode, in which the water supply pipe 31 supplies water to the brewing chamber through the water inlet 231, the input channel 503 and the first output channel 501 are connected, and the input channel 503 and the second output channel 502 are disconnected, and the beverage after brewing can be normally discharged to the beverage outlet 33 through the drinking end 221 and the output pipe 34; a connection mode corresponding to the forward rinsing mode, in which the water supply pipe 31 supplies water to the brewing chamber through the water inlet 231, the input channel 503 and the second output channel 502 are connected, and the input channel 503 and the first output channel 501 are disconnected, and the wastewater generated by cleaning the brewer 20 can be smoothly discharged into the water storage pan 36 for subsequent cleaning and maintenance. When the water supply pipe 31 supplies water to the brewing chamber through the water inlet 231, the connected delivery channel is selected differently in different modes. The switching component 50 can reliably switch to realize the beverage output and cleaning water discharge of the brewer 20 without the need to set up complicated pipelines, thereby reducing the cost and volume of the water system.

[0131] The water supplied to the brewer 20 via the water supply pipe 31 can be hot water heated by the heater 38 from a self-supply water source 35. The water from the water source 35 is pumped to the heater 38 via the pump 39. The water source 35 can be, for example, the water tank of the beverage machine, filtered tap water, or bottled water. The heater 38 can be a boiler or an instant heater 38 (e.g., an electric heating plate). In this embodiment, the heater 38 is constructed as a boiler.

[0132] Reference Figures 12 to 14 In this embodiment, the switching component 50 includes a first three-way valve 54 and a second three-way valve 56, which are sequentially disposed on the output pipeline 34. The first three-way valve 54 is connected to the output pipeline 34, the second three-way valve 56, and the water storage pan 36, respectively. The second three-way valve 56 is connected to the first three-way valve 54, the beverage outlet 33, and the water storage pan 36, respectively. In the reverse rinsing mode, the first three-way valve 54 connects the beverage outlet 33 and the water storage pan 36, while simultaneously blocking the liquid flow from the input channel 503 to the beverage outlet 33 and the water storage pan 36, preventing reverse rinsing water from accidentally flowing into the beverage outlet 33 and causing contamination. In the reverse rinsing mode, the second three-way valve 56 connects the output pipeline 34 and the first three-way valve 54, and blocks the liquid flow from the output pipeline 34 to the water storage pan 36, precisely controlling the liquid flow direction. In addition, during the forward flushing mode, the second three-way valve 56 connects the input channel 503 and the water storage pan 36, while blocking the liquid flow from the input channel 503 to the first three-way valve 54, effectively realizing the rapid discharge of the forward cleaning fluid and ensuring that there is no residual liquid in the internal pipeline of the equipment, thereby further improving the overall hygiene performance of the equipment and the user experience.

[0133] A second three-way valve 56 is provided. The first three-way valve 54 connects the output pipe 34 and the second three-way valve 56, and blocks the liquid flow from the output pipe 34 to the water storage pan 36. The second three-way valve 56 connects the beverage outlet 33 and the water storage pan 36, and blocks the liquid flow from the first three-way valve 54 to the beverage outlet 33 and to the water storage pan 36, thereby blocking the water flow from the beverage outlet 33.

[0134] In addition, the second three-way valve 56 can also be used to drain residue. After the beverage is made, the second three-way valve 56 connects the beverage outlet 33 and the water storage pan 36, while the first output channel 501 and the second output channel 502 are both connected to the atmosphere. Under the siphon effect, the residual beverage at the beverage outlet 33 can be discharged from the second output channel 502 into the water storage pan 36.

[0135] Furthermore, after the beverage is made, the first three-way valve 54 connects the output pipe 34 and the water storage pan 36, allowing the residual beverage at the first three-way valve 54 connected to the second three-way valve 56 to be discharged into the water storage pan 36 via the second output channel 502 of the first three-way valve 54.

[0136] In summary, the beverage machine's water system, through innovative structural design and precise water circuit control, enables multi-mode switching, including beverage extraction mode, forward rinsing mode, and reverse rinsing mode, effectively improving the cleaning effect of the brewer 20 and the hygiene of the equipment. Simultaneously, the rational setting of the pressure-accumulating seal 44 and flow direction regulating component 45 in the pressure storage valve 40 achieves precise adjustment of the extraction pressure, allowing for the preparation of beverages with different strengths and flavors according to demand, significantly improving the flexibility of the beverage machine. Furthermore, the switching component 50 precisely controls the flow direction and flow rate of the output pipe 34, effectively preventing cleaning liquid from accidentally flowing into the beverage outlet 33, further ensuring the hygiene performance and safety of the beverage machine. The overall water system has a compact structure, is easy to operate, and offers precise control, not only improving the user experience but also effectively reducing equipment maintenance costs, demonstrating outstanding practical application value.

[0137] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0138] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A beverage machine, characterized in that, include: A brewing device includes a brewing cylinder, an upper piston, and a lower piston, wherein the upper piston and the lower piston are respectively engaged with both ends of the brewing cylinder to form a brewing chamber; Beverage exports; Water storage tray; A water supply pipeline is provided, and a three-way valve is installed on the water supply pipeline; the three-way valve is connected to the water storage pan through a first waste pipe. The three-way valve can selectively connect the brewing chamber and the water supply pipeline or connect the brewing chamber and the water storage tray; The output pipe connects between the upper piston and the beverage outlet; The output pipeline is connected to a pressure storage valve and a switching assembly; the pressure storage valve includes a first delivery port, a second delivery port, and a flow direction regulating component; the switching assembly includes an input channel, a first output channel, and a second output channel; the upper piston has a drinking end, the first delivery port is connected to the drinking end, the second delivery port is connected to the output pipeline, the input channel is connected to the output pipeline, the first output channel is connected to the beverage outlet, and the second output channel leads to the water storage tray; The flow direction regulating component can selectively control the pressure storage valve to switch between a first connection mode and a second connection mode; the first connection mode is configured to allow the liquid flow to pass directly between the first delivery port and the second delivery port; the second connection mode is configured to allow the liquid flow to flow from the first delivery port to the second delivery port after overcoming a preset pressure storage pressure.

2. The beverage machine as described in claim 1, characterized in that, The flow direction regulating element is operable to switch between an open state and a closed state; in the beverage extraction mode, when the flow direction regulating element is in the open state, the liquid produced by the brewing chamber is the first beverage. When the flow direction regulating component is in the closed state, the liquid produced by the brewing chamber is the second beverage; the pressure inside the brewing chamber is different during the production of the first beverage and the second beverage.

3. The beverage machine as described in claim 1, characterized in that, The beverage machine has a venting mode. In the venting mode, the switching component connects the input channel and the beverage outlet. The upper piston and the lower piston are respectively engaged with the two ends of the brewing cylinder and move in opposite directions to increase the volume of the brewing chamber, so that the liquid in the pipeline between the beverage outlet and the upper piston flows back into the brewing chamber through the pressure storage valve. The upper piston and the lower piston are respectively engaged with the two ends of the brewing cylinder and move towards each other to reduce the volume of the brewing chamber, so that the liquid in the brewing chamber is discharged into the water storage tray.

4. The beverage machine as described in claim 3, characterized in that, The three-way valve connects the first waste discharge pipe and the brewing chamber, so that the liquid in the brewing chamber is discharged to the water storage pan through the first waste discharge pipe; and / or, the flow direction regulating component controls the pressure storage valve to be in the first connection mode, so that the liquid in the brewing chamber is discharged to the water storage pan through the pressure storage valve and the switching component.

5. The beverage machine as described in claim 1, characterized in that, The switching component includes a first three-way valve, which can selectively connect the input channel to the beverage outlet or connect the input channel to the water storage tray.

6. The beverage machine as described in claim 1, characterized in that, The water supply pipeline includes a first water supply branch and a second water supply branch, and the three-way valve is installed in the first water supply branch; the first water supply branch supplies water to the brewer through the lower piston; the second water supply branch supplies water to the brewer through the upper piston.

7. The beverage machine as described in claim 6, characterized in that, The second water supply branch is provided with a second valve, and the pressure storage valve further includes a third delivery port, which is connected to the second water supply branch; the third delivery port is connected to the second delivery port, and the second valve is used to control the flow of liquid from the second water supply branch to the third delivery port.

8. The beverage machine as described in claim 1, characterized in that, It also includes a water supply control valve, which is located upstream of the three-way valve along the water supply pipeline to the brewer. The water supply control valve selectively connects the water supply pipeline to the lower piston or the upper piston. The beverage machine includes a beverage extraction mode and a backwash mode. In the beverage extraction mode, the water supply control valve connects the water supply pipeline and the lower piston. The beverage prepared by the brewer flows sequentially through the upper piston, the pressure storage valve, and the output pipeline until it is output to the beverage outlet. In the reverse flushing mode, the water supply control valve connects the water supply pipeline and the upper piston, and the liquid in the water supply pipeline flows sequentially through the pressure storage valve, the upper piston, and the lower piston before being discharged.

9. The beverage machine as described in claim 1, characterized in that, The pressure storage valve includes a first connection port and a pressure storage seal. The pressure storage seal closes the first connection port under a preset pressure storage pressure to block the connection between the first delivery port and the second delivery port. The flow direction regulating member can operably push the pressure storage seal to open the first connection port so that the pressure storage valve can achieve the first connection mode.

10. The beverage machine as described in claim 9, characterized in that, The pressure storage valve further includes an elastic element and a first motor. The elastic element presses against the pressure storage seal along a first direction to close the first communication port. The flow direction regulating element is driven by the first motor to act on the pressure storage seal along a second direction, so that the pressure storage seal overcomes the pressing action of the elastic element and moves along the second direction to open the first communication port. The second direction is opposite to the first direction.

11. The beverage machine as described in claim 1, characterized in that, The pressure storage valve further includes a first connection port, a second connection port, and a pressure storage seal. The pressure storage seal closes the first connection port under a preset pressure to block the connection between the first delivery port and the second delivery port. The flow direction regulating member operably opens the second connection port so that the pressure storage valve can achieve the first connection mode.

12. The beverage machine as described in claim 11, characterized in that, The pressure storage valve also includes a valve body and a first motor. The valve body is provided with a first channel, a second channel and a third channel that are interconnected. The first channel has a first delivery port, the second channel has a first connection port that connects to the first channel, and the third channel has a second connection port that connects to the first channel. The flow direction adjustment component is movably disposed in the third channel. The first motor drives the flow direction adjustment component to move to open or close the second connection port.

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