Control valve and beverage machine

Abstract

The utility model discloses a control valve and a beverage machine, the control valve comprises a valve body, the valve body is provided with a first channel, a second channel and a third channel which communicate with one another, the first channel is provided with a first communicating port communicating with the second channel, and the third channel is provided with a second communicating port communicating with the second channel; the valve element is movably arranged in the third channel; the pressure accumulation sealing piece is arranged in the first channel and seals the first communication opening under the action of preset pressure; the valve core can operably open the second communication port, so that the second channel is communicated with the third channel; or, the valve element can operably close the second communication opening, so that the second channel and the third channel are cut off. The control valve supports the beverage machine to select different functions according to requirements, and user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of beverage preparation technology, and in particular to a control valve and a beverage machine. Background Technology

[0002] In the preparation of beverages, especially in automatic coffee machines, a brewing unit is typically included. This unit comprises an upper piston, a lower piston, and a brewing cylinder, which together form a closed brewing chamber for filling with coffee grounds or other beverage particles. The upper piston has an outlet with a pressure valve. This pressure valve includes a spring that presses against a valve ball to close the outlet. When using this type of coffee machine to make coffee, the pressure valve is initially closed by the spring. The pressure in the brewing chamber increases due to the inflow of hot water until the pressure valve opens, allowing the coffee to flow into the coffee cup through the outlet. This design effectively extracts the flavor and oils of the coffee, resulting in high-quality coffee.

[0003] In other words, existing coffee machines can only make pressurized coffee using the pressure valve of the brewer, and cannot perform other functions through the pressure valve.

[0004] However, in order to achieve multiple functional modes, although the relevant technical group has developed an improved multi-channel valve, it is still difficult to balance structural simplification and pressure flow path switching functions. Utility Model Content

[0005] The purpose of this utility model is to provide a control valve with a simple structure that can be adapted to beverage machines and has different functions.

[0006] Another objective of this invention is to provide a beverage machine that allows for the selection of different functions.

[0007] To achieve one of the above-mentioned objectives, this utility model provides a control valve, comprising:

[0008] 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 port that connects to the second channel, and the third channel has a second port that connects to the second channel.

[0009] A valve core, which is movably disposed within the third channel;

[0010] A pressure-accumulating seal is disposed in the first channel to seal the first communication port under a preset pressure.

[0011] The valve core is operable to open the second connection port to connect the second channel and the third channel; or, the valve core is operable to close the second connection port to disconnect the second channel and the third channel.

[0012] Compared with existing technologies, the advantages of this invention are as follows: By replacing the existing accumulator valve with a control valve, only one valve is needed to adapt to different functions of the beverage machine, eliminating the need for multiple valves or multiple output channels for control, thereby reducing the size and cost of the machine. Through the coordinated design of the valve core and the accumulator seal, the problems of redundant valve structure and low switching efficiency in traditional beverage machines are solved, while also possessing the advantages of integration. This significantly improves the reliability, hygiene, and economy of the equipment, making it suitable for fluid control in various beverage machines.

[0013] As a further improvement of one embodiment of the present invention, the first channel and the third channel extend in the same direction, and the valve core is operable to move within the third channel.

[0014] As a further improvement of one embodiment of the present invention, the extension direction of the second channel intersects the extension direction of the first channel, and the second channel is located between the first channel and the third channel.

[0015] As a further improvement of one embodiment of the present invention, it also includes a pressure adjustment knob and an elastic element that provides the preset pressure. The pressure adjustment knob extends into the first channel, and the two ends of the elastic element abut against the pressure adjustment knob and the pressure accumulating seal, respectively. The pressure adjustment knob is operable to move relative to the first channel to change the deformation of the elastic element.

[0016] As a further improvement of one embodiment of the present invention, the first channel is further provided with a first conveying opening, and the third channel is further provided with a second conveying opening. Both the first conveying opening and the second conveying opening can be connected to the outer pipe. The distance from the first conveying opening to the first connecting port is greater than the distance from the second conveying opening to the second connecting port.

[0017] As a further improvement of one embodiment of the present invention, a third conveying opening is also provided in the third channel; along the extension direction or circumference of the third channel, the second conveying opening and the third conveying opening are arranged at intervals, the second conveying opening is used to connect to the beverage outlet, and the third conveying opening is used to connect to the water supply pipeline.

[0018] This utility model's control valve allows users to select different flavored beverages according to their needs, providing a variety of taste options. It can also perform reverse rinsing relative to the fluid flow direction of the beverage output, thereby enhancing the user experience.

[0019] As a further improvement of one embodiment of the present invention, a motor is provided at one end of the third channel away from the second communication port, and the motor drives the valve core to move to open or close the second communication port; the center line of the second channel intersects the rotation axis of the motor, and the movement range of the valve core is limited to one side of the center line of the second channel.

[0020] As a further improvement of one embodiment of the present invention, the third channel is provided with a first step portion, the outer periphery of the valve core is provided with a second step portion, the valve core closes the second communication port, and the second step portion abuts against the first step portion to limit the extreme position of the valve core.

[0021] As a further improvement of one embodiment of the present invention, along the direction away from the second communication port, a first sealing ring and a retaining ring are sequentially fitted on the valve core; the valve body is provided with a first slot that radially penetrates the third channel, a first opening clamp is connected in the first slot, the first opening clamp is clamped on the valve core and located on the side of the retaining ring away from the second communication port, and the first opening clamp limits the retaining ring through the first slot.

[0022] As a further improvement of one embodiment of the present invention, the valve body includes a first section and a second section that are inserted into each other, the first channel and the second channel are disposed in the first section, and the third channel is disposed in the second section; the third channel is provided with a first step portion, and the valve core includes an end sealing surface, the end sealing surface abutting against the first step portion to close the second communication port.

[0023] This utility model also provides a beverage machine, including:

[0024] 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;

[0025] The water supply line can be selectively connected to the brewing chamber to supply water to the brewing chamber;

[0026] A beverage outlet for discharging liquid produced from the brewing chamber;

[0027] A control valve, as described above, is connected between the water supply pipeline and the brewing chamber.

[0028] As a further improvement of one embodiment of this utility model, the first channel and the third channel are both connected to the beverage outlet, the second channel is connected to the brewing chamber, the valve core controllably opens the second communication port to allow unobstructed fluid communication between the brewing chamber and the third channel, and the liquid produced by the brewing chamber is the first beverage; the valve core controllably closes the second communication port to allow obstructed fluid communication between the brewing chamber and the first channel, and the liquid produced by the brewing chamber is the second beverage; the concentration of the first beverage is different from the concentration of the second beverage.

[0029] As a further improvement of one embodiment of this utility model, a water supply switching component is provided on the water supply line. A first water supply branch and a second water supply branch are connected between the water supply switching component and the brewing chamber. The first water supply branch is connected to the lower piston, and the second water supply branch is connected to the upper piston through the control valve. The water supply switching component controllably connects the second water supply branch and the third channel so that when the second connection port is open, the second water supply branch supplies water to the brewing chamber through the second channel.

[0030] When the water circuit switching component connects the second water supply branch and the third channel, water can enter the brewing chamber through the control valve to clean the filter screen on the upper piston, further ensuring the hygienic performance of the beverage machine.

[0031] As a further improvement of one embodiment of the present invention, the second channel is connected to the upper piston, and the first delivery opening of the first channel and the second delivery opening of the third channel are both connected to the outer pipe, which is connected to the beverage outlet.

[0032] As a further improvement of one embodiment of the present invention, during the production of the first beverage, the pressure of the brewing chamber is less than 4 bar; during the production of the second beverage, the pressure of the brewing chamber is in the range of 6 bar to 12 bar.

[0033] As a further improvement of one embodiment of this utility model, the first channel is connected to the beverage outlet, the third channel is connected to the water supply pipeline, the second channel is connected to the brewing chamber, the valve core controllably opens the second connection port, the water supply pipeline is connected to the third channel to supply water to the brewing chamber in a first direction; the valve core controllably closes the second connection port, the brewing chamber is fluidly connected to the first channel with obstruction, and the direction of liquid flow in the obstructed connection is opposite to the first direction.

[0034] As a further improvement of one embodiment of this utility model, the third channel is provided with a second conveying opening and a third conveying opening; the second conveying opening is connected to the beverage outlet, and the third conveying opening is connected to the water supply pipeline; the valve core opens the second communication port, and the brewing chamber is in unobstructed fluid communication with the third channel, and the direction of the unobstructed liquid flow is opposite to the first direction. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a control valve according to one embodiment of the present invention.

[0036] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the control valve.

[0037] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the control valve along line AA, with the valve core in the position where the second connection port is open.

[0038] Figure 4 是 Figure 1 The diagram shows the control valve, with the valve core in the closed position of the second connection port.

[0039] Figure 5 yes Figure 1 The diagram shows the control valve, where the accumulator seal is in the position where the first connection port is open.

[0040] Figure 6 This is a schematic diagram of another structural form of the control valve of this utility model.

[0041] Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the control valve along line BB, with the valve core in the position where the second connection port is open.

[0042] Figure 8 yes Figure 7 The diagram shows the control valve, with the valve core in the closed position of the second connection port.

[0043] Figure 9 yes Figure 6 A three-dimensional schematic diagram of the control valve.

[0044] Figure 10 yes Figure 6 A schematic diagram of another structural form of the control valve in the diagram.

[0045] Figure 11 This is a schematic diagram of a beverage machine according to one embodiment of the present invention, showing the direction of liquid flow for brewing beverages.

[0046] Figure 12 yes Figure 11 A schematic diagram of another structural form of a beverage machine, showing the direction of liquid flow when brewing beverages.

[0047] Figure 13 yes Figure 11 A schematic diagram of another structural form of a beverage machine, showing the direction of liquid flow for reverse cleaning.

[0048] Figure 14 yes Figure 13 The diagram shows the direction of the liquid flow during forward cleaning. Detailed Implementation

[0049] 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.

[0050] This embodiment specifically relates to a control valve, and more particularly to a control valve suitable for beverage machines. This control valve has a compact structure and high integration, and can selectively output pressurized and unpressurized beverages through the operation of a single valve core, thereby meeting users' needs for different flavored beverages. At the same time, it effectively simplifies the internal structure of the equipment and reduces manufacturing costs.

[0051] Reference Figures 1 to 3 The control valve 10 includes a valve body 20, a valve core 31, and a pressure accumulator seal 24. The valve body 20 contains three interconnected channels: a first channel 21, a second channel 22, and a third channel 23. The first channel 21 has a first connection port 211 connecting to the second channel 22, and the third channel 23 has a second connection port 232 connecting to the second channel 22. The three channels are connected through specific connection ports, forming a defined internal fluid path. The valve core 31 is movably disposed within the third channel 23 and can selectively control the opening and closing state of the second connection port 232, thereby changing the fluid output path and achieving different functions.

[0052] A pressure-accumulating seal 24 is disposed within the first channel 21, sealing the first connecting port 211 under a preset pressure. When the liquid pressure in the second channel 22 reaches the preset pressure, the pressure-accumulating seal 24 automatically opens the first connecting port 211, enabling the output of the pressurized beverage. The "preset pressure" refers to the pressure at which the first connecting port 211 is opened, precisely adjusted and determined in advance by the user or equipment manufacturer using the pre-tightening force of the elastic element 26. When the fluid pressure in the second channel 22 reaches the set value, the pressure-accumulating seal 24 automatically opens the first connecting port 211, allowing the liquid that has undergone pressure accumulation to be output from the first channel 21, thereby ensuring stable extraction quality and consistent taste of the pressurized beverage. (Refer to...) Figure 3 The valve core 31 operably opens the second communication port 232 to connect the second channel 22 and the third channel 23; or, refer to Figure 4 The valve core 31 can operably close the second connection port 232 to disconnect the second channel 22 and the third channel 23. During beverage brewing, opening and closing the second connection port 232 allows switching between different beverage preparation modes, such as pressurized beverage preparation under pressure conditions output from the first channel 21, and pressurized beverage preparation under pressureless conditions output from the third channel 23. During backwashing, opening and closing the second connection port 232 allows switching between different functions, such as pressurized beverage preparation under pressure conditions output from the first channel 21, and backwashing with reverse fluid flow from the third channel 23 to the second channel 22.

[0053] In this embodiment, the valve core 31 can open or close the second communication port 232 through axial reciprocating motion. "Cut off" refers to the state in which the valve core 31 completely seals and isolates the second channel 22 and the third channel 23 to prevent the liquid in the second channel 22 from flowing out through the third channel 23 and affecting the quality of the pressurized beverage.

[0054] Reference Figure 5 With valve core 31 closing the second communication port 232, the brewer 40 in the beverage machine continuously outputs liquid flow to the second channel 22 until the pressure of the liquid flow exceeds the elastic force on the pressure accumulator seal 24. The pressure accumulator seal 24 is then automatically opened by the pressure of the liquid flow, realizing the traditional pressure accumulator extraction mode (i.e., pressurized extraction). (Refer to...) Figure 3 After the valve core 31 opens the second connection port 232, the liquid flow from the brewer 40 in the beverage machine to the second channel 22 can be directly output through the third channel 23, achieving unobstructed, pressureless extraction. Based on the control valve 10 provided in this embodiment, the beverage machine can select to make pressurized or pressureless beverages based on a single brewer 40, thereby providing beverages with different tastes and flavors (e.g., different flavors of coffee). Furthermore, the control valve 10 provided in this embodiment is a single valve, eliminating the need for multiple valves to control pressurized and pressureless extraction, thus reducing the machine's size and cost. The control valve 10 in this embodiment allows users to select different flavors of beverages according to their needs, providing a choice of different tastes and enhancing the user experience.

[0055] Preferably, the first channel 21 and the third channel 23 extend in the same direction, and the valve core 31 can operate within the third channel 23. For example, the valve core 31 can perform stable reciprocating motion along the axial direction of the third channel 23 to ensure the reliability and smoothness of the valve core 31's operation.

[0056] Continue to refer to Figure 3The second channel 22 is located between the first channel 21 and the third channel 23, and its extension direction intersects with that of the first channel 21. In this embodiment, the extension direction of the second channel 22 and the extension direction of the first channel 21 form a roughly "T"-shaped spatial structure, which effectively improves the utilization efficiency of the internal space of the valve body 20 and has a reasonable layout. The second channel 22 can be used to connect to the liquid outlet of the brewer 40 to receive the liquid produced by the brewer 40, while the third channel 23 is used to install the valve core 31 and can be used to connect to the beverage outlet 55 and / or the water supply pipe 51, thereby facilitating the pipe connections in the beverage machine 100.

[0057] Preferably, the control valve 10 is provided with a pressure regulating structure to achieve precise control of the preset pressure defined by the accumulating state. Specifically, the control valve 10 also includes a pressure regulating knob 25 and an elastic element 26 that provides the preset pressure. The pressure regulating knob 25 extends into the first channel 21, and the two ends of the elastic element 26 abut against the pressure regulating knob 25 and the accumulating seal 24, respectively. The pressure regulating knob 25 is operable to move relative to the first channel 21 to change the deformation of the elastic element 26, thereby adjusting the opening pressure of the accumulating seal 24.

[0058] In practice, users can change the preset pressure of the elastic element 26 (such as a compression spring) by rotating or axially pushing the pressure adjustment knob 25, thereby precisely setting the required storage pressure to meet the production needs of different beverages. For example, when the pressure adjustment knob 25 adjusts the deformation of the elastic element 26 to increase the preset pressure, the opening pressure of the storage seal 24 also increases, which is suitable for making rich beverages that require higher extraction pressure; conversely, reducing the preset pressure is suitable for light beverages with lower extraction pressure. Specifically, the adjustment range of the pressure adjustment knob 25 allows the extraction pressure to range from 6 bar to 12 bar.

[0059] With the pressure regulation structure of this embodiment, users can easily and accurately set the accumulator pressure, ensuring that the accumulator seal 24 opens under accurate pressure conditions, thereby guaranteeing the stability of the pressurized beverage extraction process and the consistency of beverage quality, significantly improving the flexibility of equipment use and user experience, and meeting personalized and diversified consumer needs.

[0060] Reference Figure 1 A motor 30 is provided at the end of the third channel 23 away from the second connection port 232. In this embodiment, a stepper motor 30 is preferred. The stepper motor 30 drives the valve core 31 to move through its precise axial movement. The motor 30 drives the valve core 31 to move to open or close the second connection port 232, so as to precisely control the opening and closing state of the second connection port 232 and ensure the accuracy and stability of the liquid output channel switching.

[0061] To effectively utilize the internal space of the valve body 20, the centerline of the second channel 22 intersects the rotation axis of the motor 30, and the movement range of the valve core 31 is limited to one side of the centerline of the second channel 22, so as to avoid spatial interference between the valve core 31 and the second channel 22 when it moves, and the structure is more compact.

[0062] To further ensure the reliable limiting of the movement of the valve core 31, in this embodiment, a first step portion 231 is also provided in the third channel 23, and a second step portion 312 is correspondingly provided on the outer periphery of the valve core 31. When the valve core 31 closes the second communication port 232, the second step portion 312 abuts against the first step portion 231 to precisely limit the extreme position of the movement of the valve core 31, prevent the valve core 31 from moving excessively and damaging the valve body 20 or the structure of the valve core 31, extend the service life of the equipment, and ensure long-term reliable operation.

[0063] Reference Figure 5 and Figure 6 The first channel 21 is also provided with a first conveying opening 213, and the third channel 23 is also provided with a second conveying opening 233. Both the first conveying opening 213 and the second conveying opening 233 can be connected to the external pipe 27 to output beverages under different pressure conditions. In order to clearly distinguish the output paths of different beverages and prevent confusion, in this embodiment, the distance L1 from the first conveying opening 213 to the first connecting port 211 is designed to be greater than the distance L2 from the second conveying opening 233 to the second connecting port 232, so as to ensure that during the pressureless extraction process (i.e., the first connecting port 211 is closed and the second connecting port 232 is open), the liquid in the second channel 22 will automatically flow to the third channel 23.

[0064] In addition, a first sealing ring 33 and a retaining ring 34 are sequentially fitted on the valve core 31 along the direction away from the second communication port 232 to achieve sealing and axial positioning of the valve core 31. To further ensure that the valve core 31 is stably held in the set position, the valve body 20 is also provided with a first slot 235 that radially penetrates the third channel 23, and a first opening clamp 35 is connected in the first slot 235. The first opening clamp 35 is engaged on the valve core 31 and located on the side of the retaining ring 34 away from the second communication port 232. The limiting cooperation between the first slot 235 and the retaining ring 34 achieves a firm and reliable axial positioning of the valve core 31, preventing the valve core 31 from accidentally falling out or loosening, thereby ensuring the reliability and safety of the equipment under long-term and frequent use.

[0065] Reference Figures 6 to 10The valve body 20 of the control valve 10 adopts a modular design, consisting of a first section 201 and a second section 202 that are plugged into each other. The first channel 21 and the second channel 22 are located in the first section 201, and the third channel 23 is located in the second section 202. The modular design makes the structure of the valve body 20 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.

[0066] The third channel 23 is provided with a first step 231, and the valve core 31 includes an end sealing surface 315, as shown in the reference. Figure 8 The end sealing surface 315 abuts against the first step portion 231 to close the second communication port 232.

[0067] Additionally, a portion of the second segment 202 is inserted into the first segment 201, and a second sealing ring 38 is provided between the first segment 201 and the second segment 202. A second slot 236 is provided on the first segment 201, and a second open clamp 37 is inserted into the second slot 236 to limit the axial movement between the first segment 201 and the second segment 202. At least one screw 203 is provided on the outer circumferential surface of the second segment 202, and the first segment 201 and the second segment 202 are fixedly connected by the screw 203, further ensuring a more reliable connection between the first segment 201 and the second segment 202.

[0068] Reference Figure 10 In one embodiment, a third conveying opening 234 is further provided within the third channel 23. The second conveying opening 233 and the third conveying opening 234 are spaced apart along the extension direction or circumference of the third channel 23, resulting in a reasonable and clear structural layout. The second conveying opening 233 connects to the beverage outlet 55, directly outputting the extracted beverage; while the third conveying opening 234 connects to the water supply pipe 51, enabling the internal water supply and cleaning function of the equipment. Through this conveying opening layout structure, the control valve 10 of this embodiment cleverly achieves a high degree of integration between beverage output and equipment cleaning water supply functions within the same valve body 20, effectively reducing additional piping, further optimizing the internal space layout of the equipment, and improving the overall coordination and integration of the equipment functions.

[0069] The control valve 10 in this embodiment also includes a motor 30 and a pressure regulating structure. The motor 30 enables precise control of the valve core 31 position, and the pressure regulating structure precisely regulates the stored pressure. The modular valve body 20 is designed for easy assembly and maintenance, resulting in a high degree of automation and convenient operation of the overall system. Long-term reliability is effectively guaranteed, thereby comprehensively improving the user experience and the market competitiveness of the equipment.

[0070] In summary, through careful design and optimized layout of the control valve 10 structure, a compact, fully functional, and highly reliable control valve 10 device has been achieved. The control valve 10 can selectively output pressurized and unpressurized beverages using a single valve core 31, significantly reducing equipment complexity and production costs. The modular valve body 20 design facilitates equipment production assembly and daily maintenance, significantly improving maintainability and production efficiency. Simultaneously, through precise driving of the valve core 31 by the motor 30 and precise adjustment of the pressure-accumulating elastic element 26, users can flexibly control the pressure accumulation to meet the extraction needs of pressurized beverages with different flavors.

[0071] Furthermore, the limiting and positioning structure of the valve core 31 improves the stability and safety of the equipment during operation; the rationally designed layout of the conveying opening integrates the beverage output and the internal cleaning function of the equipment into the same structure, further improving the functional integration and hygiene safety of the equipment. Overall, this embodiment has significant advantages in reducing costs, improving reliability and user experience, and can effectively enhance the market competitiveness of beverage equipment.

[0072] Reference Figures 11 to 14 This application also provides a novel and multifunctional beverage machine 100. The beverage machine 100 includes a brewer 40, a water supply pipe 51, and a beverage outlet 55. The brewer 40 is used to hold beverage ingredients and extract them into a beverage. The brewer 40 includes a brewing cylinder 41, an upper piston 42, and a lower piston 43. The upper piston 42 and lower piston 43 are respectively connected to both ends of the brewing cylinder 41 to form a brewing chamber. The water supply pipe 51 can selectively connect to the brewing chamber to supply water to it. The beverage outlet 55 is used to output the beverage liquid produced by the brewing chamber for the user to drink.

[0073] A control valve 10, as described above, is connected between the water supply line 51 and the brewing chamber. With just one valve, the beverage machine can select different functions, eliminating the need for multiple valves or output channels for control, thus reducing the machine's size and cost, and facilitating fluid control.

[0074] In one embodiment, both the first channel 21 and the third channel 23 are connected to the beverage outlet 55. The valve core 31 controllably opens the second connection port 232 to allow unobstructed fluid communication between the brewing chamber and the third channel 23, and the liquid produced in the brewing chamber is the first beverage. The valve core 31 controllably closes the second connection port 232 to allow obstructed fluid communication between the brewing chamber and the first channel 21, and the liquid produced in the brewing chamber is the second beverage. The concentration of the first beverage is different from the concentration of the second beverage.

[0075] Reference Figure 11As shown by the middle arrow, the movement between the valve core 31 of the control valve 10 and the second connecting port 232 enables two distinct beverage extraction modes. When the valve core 31 opens the second connecting port 232, the brewing chamber and the third channel 23 are in a state of unobstructed fluid flow. The liquid produced in the brewing chamber at this time is the first beverage, characterized by pressureless or low-pressure extraction, resulting in a mild and mellow taste with low oil content. When the valve core 31 closes the second connecting port 232, i.e., when the valve core 31 is not activated, the pressure accumulator seal 24 automatically opens due to the accumulated pressure of the liquid in the brewing chamber. At this time, the brewing chamber and the first channel 21 are in a state of obstructed fluid flow, thereby achieving pressure accumulation extraction to produce the second beverage, which has a rich taste and high oil content. Due to the different extraction modes, the first beverage differs from the second beverage, specifically in that the concentration of the first beverage differs from that of the second beverage.

[0076] By using the control valve 10, the beverage machine 100 can easily switch between different extraction modes to meet users' personalized needs for different flavors and textures, significantly improving user satisfaction.

[0077] The water supplied to the brewing chamber by the water supply pipe 51 can be hot water from a self-supply water source heated by the heater 53. Specifically, the water source can be the water tank 52 of the beverage machine 100, filtered tap water, or bottled water, etc. The heater 53 can be a boiler or an instant heater 53 (e.g., an electric heating plate). In this embodiment, the heater 53 is constructed as a boiler.

[0078] The brewing chamber is connected to the first channel 21 with fluid resistance, meaning that the brewed beverage needs to overcome resistance to flow out through the beverage outlet 55. The resistance of the first channel 21 can be formed by the elastic element 26 pressing against the pressure accumulating seal 24, so that the brewed beverage can flow out through the first channel 21 under pressure, thus making pressurized beverages (such as espresso).

[0079] The brewing chamber and the third channel 23 are in unobstructed fluid connection, meaning the brewed beverage flows directly out of the third channel 23 without needing to overcome any resistance. The third channel 23 has no structure that creates resistance, allowing the brewed beverage to flow out without pressure, thus enabling the production of pressureless coffee. However, pressureless coffee is not zero-pressure extraction. Pressure exists in coffee extraction because the flow of liquid within the pipes of the beverage machine 100 inherently requires pressure. It's just that the extraction pressure for pressureless coffee is much lower than that for pressurized coffee extraction, which requires overcoming additional resistance. Therefore, pressureless coffee simply means that there is no additional resistance in the coffee output pipes compared to pressurized coffee, and thus, no additional pressure is needed to overcome that resistance.

[0080] Specifically, during the preparation of the first beverage, the pressure in the brewing chamber is less than 4 bar; during the preparation of the second beverage, the pressure in the brewing chamber ranges from 6 bar to 12 bar. By controlling the pressure in the brewing chamber and maintaining a stable extraction process, a more consistent taste and flavor can be achieved, enhancing the user's drinking experience.

[0081] Reference Figures 12 to 14 To further optimize the cleaning effect and ensure hygiene, a water circuit switching component 54 is added to the beverage machine 100 structure. The water circuit switching component 54 is specifically connected to the brewing chamber by a first water supply branch 511 and a second water supply branch 512, enabling bidirectional or reverse cleaning of the internal piping of the beverage machine 100. The water circuit switching component 54 can be one or more three-way valves.

[0082] Specifically, the first water supply branch 511 is connected to the lower piston 43, and the second water supply branch 512 is connected to the upper piston 42 via the control valve 10. The water circuit switching assembly 54 controllably connects the second water supply branch 512 and the third channel 23 so that, with the second connection port 232 open, the second water supply branch 512 supplies water to the brewing chamber through the second channel 22.

[0083] During the cleaning process, refer to Figure 13 As indicated by the arrow, the water circuit switching component 54 controllably connects the second water supply branch 512 and the third channel 23. When the valve core 31 opens the second connection port 232, the cleaning water can enter the control valve 10 through the second channel 22, and flow back into the brewing chamber through the second connection port 232 and the first channel 21 to clean the filter screen of the upper piston 42, the inner wall of the brewing cylinder 41, and the filter screen of the lower piston 43. The cleaned water can be discharged into the water storage pan 56 through the lower piston 43.

[0084] During normal beverage brewing, water flows from the lower piston 43 to the upper piston 42, penetrating the beverage particle layer. The upper piston 42 is under pressure, making it easy for grease and fine powder to become embedded in the gaps and dead corners of the chamber. During reverse rinsing, water flows in the opposite direction from the upper piston 42, forming a water flow at a 180° angle to the brewing direction. This reverse water flow, opposite to the direction of residue accumulation, directly impacts the adhesion surface, using the water flow to peel away the grease and powder embedded in the gaps from the upper piston 42. This efficiently removes residue generated during brewing, ensuring thorough cleaning and excellent hygiene of the equipment.

[0085] The first water supply branch 511 is equipped with a three-way pressure relief valve 57, through which the cleaning water flowing out from the lower piston 43 can be discharged into the water storage pan 56.

[0086] In addition, during the cleaning process, refer to Figure 14As indicated by the arrow, the water circuit switching component 54 controllably connects the first water supply branch 511 and the lower piston 43. Cleaning water flows into the brewing chamber and, after cleaning, is discharged from the second channel 22 and the first channel 21 of the control valve 10 to the water storage pan 56, realizing forward cleaning of the brewer 40. Along the path of the beverage dispensing liquid, it removes the residue generated during the brewing process, ensuring that the equipment is thoroughly cleaned.

[0087] The aforementioned forward cleaning is defined as the liquid flow direction during cleaning being the same as the liquid flow direction when producing the beverage, for example... Figure 14 The direction of the middle arrow; reverse cleaning, defined as the direction of liquid flow during cleaning being opposite to the direction of liquid flow when producing the beverage, for example... Figure 13 The direction of the middle arrow.

[0088] Reference Figure 6 and Figure 12 In one embodiment, the second channel 22 is connected to the upper piston 42, and the first delivery opening 213 of the first channel 21 and the second delivery opening 233 of the third channel 23 are both connected to the outer pipe 27, which is connected to the beverage outlet 55. With this connection structure, liquid output from the first delivery opening 213 and the second delivery opening 233 can be discharged from the same outer pipe 27 to the beverage outlet 55. The piping layout is simple, saving space.

[0089] Among other feasible options, such as Figure 12 As shown, the third channel 23 may only have a second conveying opening 233. A three-way structure component is provided between the third channel 23 and the beverage outlet 55. The second water supply branch 512 can be connected to the third channel 23 through the three-way structure component, thereby realizing the connection with the brewing chamber.

[0090] Reference Figure 10 , Figure 13 and Figure 14 The third channel 23 is also equipped with a third conveying opening 234, which is used to connect to the water supply pipe 51. The cleaning water flow can flexibly choose to enter the brewing chamber in the opposite direction, realizing reverse rinsing of the brewing chamber. With the appropriate electrical control system, it can also realize bidirectional cleaning in both forward and reverse directions, that is, seamless switching between forward and reverse cleaning, so that the cleaning of each pipe and brewer 40 component inside the equipment is more thorough, and the hygiene performance is further improved.

[0091] In one embodiment, refer to Figures 12 to 14The first channel 21 is connected to the beverage outlet 55, the third channel 23 is connected to the water supply pipe 51, and the second channel 22 is connected to the brewing chamber. The valve core 31 can controllably open the second connection port 232, and the water supply pipe 51 is connected to the third channel 23 to supply water to the brewing chamber in the first direction. The valve core 31 can controllably close the second connection port 232, and the brewing chamber and the first channel 21 are connected by a fluid obstruction. The direction of liquid flow in the obstructed connection is opposite to the first direction.

[0092] By opening and closing the second connection port 232 through the valve core 31, different functions of the beverage machine 100 can be switched. For example, when the brewing chamber is connected to the first channel 21 with fluid obstruction, pressurized beverages can be made. When the water supply pipe 51 is connected to the third channel 23 to supply water to the brewing chamber in the first direction, the brewing chamber can be backwashed through the control valve 10.

[0093] Reverse rinsing can be performed relative to the direction of fluid flow from the beverage output, ensuring thorough cleaning of the equipment and thus improving the user experience.

[0094] Optionally, the third channel 23 is provided with a second conveying opening 233 and a third conveying opening 234; the second conveying opening 233 is connected to the beverage outlet 55, and the third conveying opening 234 is connected to the water supply pipeline 51; the valve core 31 opens the second connecting port 232, and the brewing chamber and the third channel 23 are in unobstructed fluid communication, and the direction of liquid flow in the unobstructed communication is opposite to the first direction.

[0095] In addition to pressurized beverage making and reverse rinsing, the beverage machine 100 can also make pressureless beverages, offering more functional options and enhancing the user experience.

[0096] The innovative design of the overall structure and cleaning solution of the beverage machine 100 effectively solves the problems of the traditional beverage machine 100's single extraction mode and incomplete cleaning. It not only significantly improves the hygiene performance of the beverage machine 100, but also enriches the variety and taste of beverages, and comprehensively enhances the product's market competitiveness and user satisfaction.

[0097] In summary, this application, through the ingenious design of the structure of the control valve 10 and its integration with the beverage machine 100, achieves free switching between multiple coffee extraction modes under a single control valve 10 structure, effectively solving the technical problem that the existing beverage machine 100 can only provide a single extraction method.

[0098] The precisely designed valve core 31, in conjunction with the second communication port 232 and the pressure adjustment knob 25, enables the device to possess precise and flexible pressure adjustment capabilities, meeting users' diverse individual needs for coffee flavor and taste. Simultaneously, by setting multiple delivery openings in the second channel 22 and cooperating with the water path switching component 54, forward, reverse, and reciprocating bidirectional rinsing modes are successfully achieved, greatly improving the internal hygiene and cleaning efficiency of the device. Furthermore, the overall structure of this application is more compact, manufacturing costs are significantly reduced, overall reliability is improved, and the user experience is comprehensively optimized, giving it excellent application prospects and market competitiveness.

[0099] Of course, the beverage machine 100 mentioned above is not limited to use in coffee machines, but can also be used in other beverage brewing devices, such as tea machines or other beverage brewing devices.

[0100] 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.

[0101] 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 control valve, characterized in that, include: 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 connection port that connects to the second channel, and the third channel has a second connection port that connects to the second channel. A valve core, which is movably disposed within the third channel; A pressure-accumulating seal is disposed in the first channel to seal the first communication port under a preset pressure. The valve core is operable to open the second connection port to connect the second channel and the third channel; or, the valve core is operable to close the second connection port to disconnect the second channel and the third channel.

2. The control valve according to claim 1, characterized in that, The first channel and the third channel extend in the same direction, and the valve core is operable to move within the third channel.

3. The control valve according to claim 1 or 2, characterized in that, The extension direction of the second channel intersects the extension direction of the first channel, and the second channel is located between the first channel and the third channel.

4. The control valve according to claim 1, characterized in that, It also includes a pressure adjustment knob and an elastic element that provides the preset pressure. The pressure adjustment knob extends into the first channel, and the two ends of the elastic element abut against the pressure adjustment knob and the pressure accumulating seal, respectively. The pressure adjustment knob is operable to move relative to the first channel to change the deformation of the elastic element.

5. The control valve according to claim 1, characterized in that, The first channel is further provided with a first conveying opening, and the third channel is further provided with a second conveying opening. Both the first conveying opening and the second conveying opening can be connected to an external pipe. The distance from the first conveying opening to the first connecting port is greater than the distance from the second conveying opening to the second connecting port.

6. The control valve according to claim 5, characterized in that, The third channel is also provided with a third conveying opening; along the extension direction or circumference of the third channel, the second conveying opening and the third conveying opening are arranged at intervals, the second conveying opening is used to connect to the beverage outlet, and the third conveying opening is used to connect to the water supply pipeline.

7. The control valve according to claim 1, characterized in that, The third channel is equipped with a motor at one end away from the second connection port. The motor drives the valve core to move to open or close the second connection port. The centerline of the second channel intersects the rotation axis of the motor, and the movement range of the valve core is limited to one side of the centerline of the second channel.

8. The control valve according to claim 2, characterized in that, The third channel is provided with a first step portion, and the outer periphery of the valve core is provided with a second step portion. The valve core closes the second communication port, and the second step portion abuts against the first step portion to limit the extreme position of the valve core.

9. The control valve according to claim 1, characterized in that, Along the direction away from the second communication port, a first sealing ring and a retaining ring are sequentially fitted on the valve core; the valve body is provided with a first slot that radially penetrates the third channel, and a first opening clamp is connected in the first slot. The first opening clamp is clamped on the valve core and located on the side of the retaining ring away from the second communication port. The first opening clamp limits the retaining ring through the first slot.

10. The control valve according to claim 1, characterized in that, The valve body includes a first section and a second section that are inserted into each other. The first channel and the second channel are disposed in the first section, and the third channel is disposed in the second section. The third channel has a first step portion. The valve core includes an end sealing surface. The end sealing surface abuts against the first step portion to close the second communication port.

11. 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; The water supply line can be selectively connected to the brewing chamber to supply water to the brewing chamber; A beverage outlet for discharging liquid produced from the brewing chamber; The feature is that a control valve as described in any one of claims 1 to 10 is connected between the water supply pipeline and the brewing chamber.

12. The beverage machine according to claim 11, wherein the first channel and the third channel are both connected to the beverage outlet, the second channel is connected to the brewing chamber, the valve core controllably opens the second communication port to allow unobstructed fluid communication between the brewing chamber and the third channel, and the liquid produced by the brewing chamber is a first beverage; the valve core controllably closes the second communication port to allow obstructed fluid communication between the brewing chamber and the first channel, and the liquid produced by the brewing chamber is a second beverage; the concentration of the first beverage is different from the concentration of the second beverage.

13. The beverage machine according to claim 12, characterized in that, The water supply line is equipped with a water supply switching component. The water supply switching component is connected to the brewing chamber by a first water supply branch and a second water supply branch. The first water supply branch is connected to the lower piston, and the second water supply branch is connected to the upper piston through the control valve. The water supply switching component controllably connects the second water supply branch and the third channel so that when the second connection port is open, the second water supply branch supplies water to the brewing chamber through the second channel.

14. The beverage machine according to claim 12, characterized in that, The second channel is connected to the upper piston, and the first delivery opening of the first channel and the second delivery opening of the third channel are both connected to the outer pipe, which is connected to the beverage outlet.

15. The beverage machine according to claim 12, characterized in that, 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.

16. The beverage machine according to claim 11, wherein the first channel is connected to the beverage outlet, the third channel is connected to the water supply pipe, the second channel is connected to the brewing chamber, the valve core controllably opens the second connection port, the water supply pipe is connected to the third channel to supply water to the brewing chamber in a first direction; the valve core controllably closes the second connection port, the brewing chamber is in fluid obstruction communication with the first channel, and the direction of liquid flow in obstruction communication is opposite to the first direction.

17. The beverage machine according to claim 16, wherein the third channel is provided with a second conveying opening and a third conveying opening; the second conveying opening is connected to the beverage outlet, and the third conveying opening is connected to the water supply pipeline; the valve core opens the second communication port, and the brewing chamber is in unobstructed fluid communication with the third channel, wherein the direction of the unobstructed liquid flow is opposite to the first direction.

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