Brewing residual liquid cleaning method, brewing equipment and storage medium

Abstract

The invention relates to a cleaning method for brewing residual liquid, brewing equipment and a storage medium. The cleaning method for the brewing residual liquid comprises the steps that two piston pieces are controlled to move to a sealed brewing cavity; and at least one piston piece is controlled to be close to the other piston piece so as to drive the brewing residual liquid to be discharged from the liquid passing pipeline. According to the invention, at least one piston piece is operated to move close to the other piston piece, so that brewing residual liquid remaining in the brewing cavity and / or the liquid passing pipeline can be pushed to the outlet end of the liquid passing pipeline in a concentrated manner, and timely recovery treatment of the brewing residual liquid is facilitated; abnormities of deterioration, pollution, pipeline blockage and the like caused by long-time residual of brewing residual liquid are effectively prevented, and the brewing device has the advantage of being easy to operate.

Description

Technical Field

[0001] This invention relates to the field of brewing equipment technology, specifically to a method for cleaning residual brewing liquid, brewing equipment, and storage medium. Background Technology

[0002] After each brewing cycle, the brewing cylinder in a brewing device pumps the beverage out of the chamber via a pump and a discharge pipe, while any residual brewing liquid remaining is discharged via a waste drain pipe. Alternatively, it can be rinsed with water and drained from the beverage outlet. This process can affect brewing efficiency and may result in residual liquid flowing into the beverage if it's not removed promptly after brewing. Over time, the brewing cylinder's interior and piston components are cleaned periodically, but residual brewing liquid can easily accumulate in the discharge and waste drain pipes, leading to spoilage, off-flavors, and negatively impacting the quality of subsequent beverage preparations. This is especially true for the section of pipe between the brewing cylinder and the beverage outlet. Summary of the Invention

[0003] The main objective of this invention is to provide a method for cleaning residual brewing liquid, a brewing device, and a storage medium, which aims to solve the problem of reduced brewing quality caused by the failure to clean residual brewing liquid in the liquid passage connected to the brewing chamber in traditional brewing devices.

[0004] To achieve the above objectives, the present invention proposes a method for cleaning residual brewing liquid, which is applied to a brewing device. The brewing device includes a brewing cylinder having a brewing chamber, two pistons that are movable relative to each other and disposed in the brewing chamber, and a liquid passage that is configurably connected to the brewing chamber. The method for cleaning up residual brewing liquid includes: Control the movement of the two piston components to seal the brewing chamber; Control at least one of the piston components to move closer to the other piston component, so as to push the residual brewing liquid outward from the liquid passage.

[0005] Optionally, in the step of controlling at least one of the pistons to move closer to the other piston to push the residual brewing liquid outward from the liquid passage, the volume change caused by the movement of the piston is not less than the volume of the liquid passage.

[0006] Optionally, the liquid passage is provided in multiple parts, which are a first passage and the remaining second passages; The step of controlling at least one of the piston members to move closer to the other piston member so as to push the residual brewing liquid outward from the liquid passage includes: The first pipeline is connected to the brewing chamber while each of the second pipelines is isolated from the brewing chamber. Control at least one of the piston components to move closer to the other piston component, so as to push the residual brewing liquid outward from the first pipeline.

[0007] Optionally, the first pipeline is a waste discharge pipeline; and / or, The first pipeline is a liquid outlet pipeline connected to the beverage outlet of the brewing device; and / or, One of the second pipelines is a water injection pipeline; and / or, The brewing chamber extends vertically through the brewing cylinder, and the two pistons are a first piston and a second piston arranged sequentially from bottom to top; the first pipe is a waste discharge pipe, which passes through the first piston and is shunt-connected to the brewing chamber; and / or the first pipe is a liquid outlet pipe connected to the beverage outlet of the brewing device, which passes through the second piston and is shunt-connected to the brewing chamber.

[0008] Optionally, one of the second pipelines is a water injection pipeline; After the step of controlling at least one of the pistons to move closer to the other piston to push the residual brewing liquid outward from the first pipeline, the following steps are included: Control the water injection pipeline to connect with the brewing chamber, and inject clean water into the brewing chamber; The residual brewing liquid in the brewing chamber is discharged outwards.

[0009] Optionally, before the step of controlling the water injection pipeline to connect with the brewing chamber and injecting clean water into the brewing chamber, the method further includes: The two piston components are positioned within the brewing chamber and spaced at a preset distance.

[0010] Optionally, the amount of clean water injected is not less than the volume of the currently empty space in the brewing chamber.

[0011] Optionally, at least one of the two piston members may be disengaged from the brewing chamber to form an opening at the brewing cylinder; The step of discharging the residual brewing liquid in the brewing chamber includes: Control at least one of the piston components to disengage outward from the brewing chamber; Control another piston to move toward the opening so that the brewing residue in the brewing chamber is discharged outward through the opening.

[0012] Optionally, the brewing chamber extends vertically through the brewing cylinder, and the two pistons are a first piston and a second piston arranged sequentially from bottom to top. The first piston can detach from the brewing chamber to form an opening at the brewing cylinder. The step of discharging the residual brewing liquid in the brewing chamber includes: The first piston is controlled to move downward within the brewing chamber until it disengages outside the brewing chamber.

[0013] Optionally, the brewing chamber extends vertically through the brewing cylinder, and the two pistons are a first piston and a second piston arranged sequentially from bottom to top. The second piston can detach from the brewing chamber to form an opening at the brewing cylinder. The step of discharging the residual brewing liquid in the brewing chamber includes: The second piston is controlled to move upward within the brewing chamber until it disengages outside the brewing chamber; The first piston is controlled to move toward the opening so that the residual brewing liquid in the brewing chamber is discharged outward through the opening.

[0014] Optionally, at least one of the two piston members may be disengaged from the brewing chamber to form an opening at the brewing cylinder; Before the step of controlling the movement of the two pistons to seal the brewing chamber, the method further includes: Control at least one of the piston components to disengage outward from the brewing chamber; Control another piston to move toward the opening so as to discharge the residue in the brewing chamber outward through the opening.

[0015] Optionally, in the step of controlling another piston to move toward the opening, the piston moves to be flush with the opening.

[0016] Optionally, when performing the steps of discharging the residue and discharging the residual brewing liquid, the moving positions of each piston component are controlled to be the same, and the discharge directions are the same.

[0017] In addition, to achieve the above objectives, the present invention also provides a method for cleaning residual brewing liquid, which is applied to a brewing device. The brewing device includes a brewing cylinder having a brewing chamber, two pistons that are movable relative to each other and disposed in the brewing chamber, a liquid passage that is shuntly connected to the brewing chamber, and an input module, which is used to input the input value of a preset parameter. The method for cleaning up residual brewing liquid includes: Control the movement of the two piston components into the brewing chamber; The input value of the input module is obtained, and based on the input value, at least one of the piston components is controlled to move closer to the other piston component, so as to drive the residual brewing liquid in the liquid passage to be discharged from the liquid passage.

[0018] Optionally, the preset parameters include the specifications of the liquid passage and / or the movement parameters of the two piston components.

[0019] Furthermore, to achieve the above objectives, the present invention also provides a brewing device, comprising: A brewing module includes a brewing cylinder having a brewing chamber, two pistons movably disposed relative to the brewing cylinder, a liquid passage connectable to the brewing chamber via a valve body, and a drive mechanism for driving the pistons; and... A control device is electrically connected to the drive mechanism and the valve body, respectively. The control device includes a memory, a processor, and a cleaning program for residual brewing liquid stored in the memory and executable on the processor. The cleaning program for residual brewing liquid is configured to implement the steps of the cleaning method for residual brewing liquid as described above.

[0020] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a cleaning program for residual brewing liquid, wherein when the cleaning program for residual brewing liquid is executed by a processor, the steps of the cleaning method for residual brewing liquid as described above are implemented.

[0021] In the technical solution provided by this invention, the outer peripheral sidewall of the piston component and the sidewall of the brewing chamber are sealed together. This allows both piston components to jointly enclose and define the brewing chamber between them, as well as the liquid-passing pipe connecting to the brewing chamber, when both piston components are moved to the brewing chamber. Then, by operating at least one piston component to move closer to the other, the residual brewing liquid in the brewing chamber and / or the liquid-passing pipe can be concentrated and pushed to the outlet end of the liquid-passing pipe. This facilitates the timely recovery and treatment of residual brewing liquid, effectively preventing deterioration, contamination, and pipe blockage caused by prolonged residue. Furthermore, this method is simple to operate. In addition, when the brewing module is used in a brewing device, no additional pump or bypass branch is needed between the brewing tank and the beverage outlet; only a single complete liquid-passing pipe is required. This simplifies the overall piping layout, prevents beverage accumulation in the piping, and facilitates cleaning. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A longitudinal sectional view of a first embodiment of the brewing module provided by the present invention; Figure 2 A longitudinal sectional view of a second embodiment of the brewing module provided by the present invention; Figure 3 A longitudinal sectional view of a third embodiment of the brewing module provided by the present invention; Figure 4 This is a schematic diagram of the initial state of the brewing module provided by the present invention when performing the slag discharge operation; Figure 5 for Figure 4 A schematic diagram of the second piston component after it has been moved upwards; Figure 6 for Figure 4 A schematic diagram of the upward movement of the first piston component; Figure 7 for Figure 4 A schematic diagram of the first piston component after it has been moved upwards; Figure 8 This is a schematic diagram of the initial state of the brewing module provided by the present invention when performing the slag discharge operation; Figure 9 for Figure 8 A schematic diagram of the downward movement of the first piston component; Figure 10 for Figure 8 A schematic diagram showing the first piston component after it has been removed from the brewing tank; Figure 11 for Figure 8 A schematic diagram of the second piston component after it has been moved downwards; Figure 12 This is a schematic diagram of the structure of the control device for the hardware operating environment involved in an embodiment of the present invention; Figure 13 This is a schematic flowchart of an embodiment of the method for cleaning up residual brewing liquid provided by the present invention.

[0024] Explanation of icon numbers: 100 Brewing tank; 110 Brewing chamber; 210 First piston; 220 Second piston; 310 Waste discharge pipe; 320 Water injection pipe; 330 Three-way valve; 340 Liquid outlet pipe; 350 Switch valve; 400 Control device; 410 Processor; 420 Communication bus; 430 User interface; 440 Network interface; 450 Memory.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0027] Please see Figures 1 to 12 This invention provides a brewing device, which includes a brewing module and a control device 400. The brewing module includes a brewing cylinder 100 forming a brewing chamber 110, two pistons detachably disposed within the brewing chamber 110 and movable relative to the brewing cylinder 100, a liquid-passing pipeline connected to the brewing chamber 110 via a valve body, and a drive mechanism for driving the pistons. The liquid-passing pipeline can be one or at least two. When there are at least two liquid-passing pipelines, each liquid-passing pipeline is a first pipeline and the remaining second pipeline. The control device 400 is electrically connected to the drive mechanism and the valve body.

[0028] The brewing module is mainly used to brew and extract powders such as coffee powder, soybean powder, and tea leaves, ultimately obtaining coffee, soy milk, and tea beverages. A brewing cylinder 100 has a brewing chamber 110 extending along a first direction. This design does not limit the first direction; it can be set to any direction according to actual needs. Specifically, the brewing cylinder 110 can be arranged vertically, horizontally, or inclined relative to vertically / horizontally, all within the scope of protection defined by this invention. However, for ease of understanding, in the following embodiments, the first direction is taken as the direction of gravity, i.e., vertically, with the brewing cylinder 100 having a brewing chamber 110 extending vertically as an example. In this case, the brewing chamber 110 has two openings: an upper opening and a lower opening. Correspondingly, at least in the brewing chamber 110, two pistons are arranged sequentially vertically, and at least one of them has a vertical travel stroke. For ease of understanding, the two piston components are defined below as a first piston component 210 and a second piston component 220 arranged sequentially from bottom to top (at least at the brewing chamber 110). The first piston component 210 can selectively move out of the brewing chamber 110 and can enter the brewing chamber 110 through its lower opening; the first piston component 210 can have a first vertical movement stroke within the brewing chamber 110. And / or, the second piston component 220 can selectively move out of the brewing chamber 110 and can enter the brewing chamber 110 through its upper opening; the second piston component 220 can have a second vertical movement stroke within the brewing chamber 110.

[0029] The brewing module may also include at least one drive mechanism. The drive mechanism is drivenly connected to the first piston 210 and / or the second piston 220 to drive the first piston 210 and / or the second piston 220 to move. The drive mechanism is also electrically connected to the control device 400 to enable intelligent automatic driving of the first piston 210 and / or the second piston 220 under the control of the control device 400.

[0030] The brewing module may also include multiple liquid-passing pipes that are responsively connected to the brewing chamber 110. These liquid-passing pipes are pipes that allow liquid to flow through them. For example, a water injection pipe 320 may be used to connect an external water source to the brewing chamber 110. The water injection pipe 320 is connected to an external water source or a hot water boiler for brewing, and when connected to the brewing chamber 110, it allows water from the external source to flow into the brewing chamber 110. The water source may be, but is not limited to, clean water at room temperature, high temperature, or low temperature, or high-temperature steam. The liquid-passing pipes may also be used to discharge liquid from the brewing chamber 110 to the outside, such as an outlet pipe or a waste discharge pipe 310. When connected to the brewing chamber 110, the outlet pipe can discharge the beverage prepared in the brewing chamber 110 to, for example, a beverage outlet. When the waste discharge pipe 310 is connected to the brewing chamber 110, it can discharge the waste liquid in the brewing chamber 110 to, for example, a waste liquid tank.

[0031] The liquid flow line and the brewing chamber 110 are connected in a switchable manner via, for example, a valve body. Various types of valve bodies are available, including, specifically, a three-way valve 330, a switching valve, etc. The driving force for the liquid flow between the liquid flow line and the brewing chamber 110 can originate from, for example, a pump body. In practical applications, for example, the outlet line can be connected to the brewing chamber 110 via a second piston member 220; for example, both the waste discharge line 310 and the water injection line 320 can be connected to a main line via a three-way valve 330, and then the main line is connected to the brewing chamber 110 via a first piston member 210. The three-way valve 330 can be selectively opened and closed to achieve either connection or disconnection between the waste discharge line 310, the water injection line 320, and the brewing chamber 110.

[0032] In other embodiments, a normally closed structure may not be required, and a separate switching valve 350 may be used to cut off the pipeline entering the brewing chamber 110.

[0033] As can be seen from the above, during long-term use, certain sections of the liquid-passing pipeline, such as the section between the valve body and the brewing chamber 110, may easily retain residual brewing liquid. Therefore, in this invention, each liquid-passing pipeline is defined as a first pipeline and the remaining second pipelines. Taking the liquid-passing pipelines as an example, when the first pipeline is the waste discharge pipeline 310, the second pipelines are the liquid outlet pipeline and the water injection pipeline 320. When the first pipeline is the liquid outlet pipeline, the second pipelines are the waste discharge pipeline 310 and the water injection pipeline 320. Of course, there can be one first pipeline, or specifically at least two.

[0034] It should be noted that the brewing equipment in this design can be a device solely used for brewing and extracting powdered materials. Alternatively, depending on actual needs, the brewing equipment can selectively integrate one or more modules such as a grinding module and a milk supply module to form a fully automated beverage preparation device.

[0035] In addition, in one embodiment, the brewing device may further include an input module. This input module may be, but is not limited to, a touch panel or similar component. The input interface of the input module has at least one preset parameter pre-set. When the user operates based on the input module, they can input the corresponding values ​​for each preset parameter. The preset parameters may be, but are not limited to, the specifications of at least one liquid-passing pipe and / or the motion parameters of the two piston components. The specifications of the liquid-passing pipe may include, but are not limited to, the pipe diameter, volume, length, and material of the liquid-passing pipe; the motion parameters of the two piston components may include, but are not limited to, the distance between the two piston components, the direction of movement of any piston component, the speed of movement, and the distance of movement.

[0036] Reference Figure 12 , Figure 12 This is a schematic diagram of the control device 400 for the hardware operating environment involved in the embodiment of the present invention.

[0037] like Figure 12 As shown, the control device 400 may include: a processor 410, such as a central processing unit (CPU), a communication bus 420, a user interface 430, a network interface 440, and a memory 450. The communication bus 420 is used to enable communication between these components. The user interface 430 may include a display screen or an input unit such as a keyboard; optionally, the user interface 430 may also include a standard wired interface or a wireless interface. The network interface 440 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 450 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 450 may also be a storage device independent of the aforementioned processor 410.

[0038] Those skilled in the art will understand that Figure 12 The structure shown does not constitute a limitation on the control device 400, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0039] like Figure 12 As shown, the memory 450, which serves as a storage medium, may include an operating system, a network communication module, a user interface 430 module, and a program for cleaning up residual brewing liquid.

[0040] exist Figure 12 In the control device 400 shown, the network interface 440 is mainly used for data communication with the network server; the user interface 430 is mainly used for data interaction with the user; the processor 410 and the memory 450 in the control device 400 of the present invention can be set in the brewing equipment. The control device 400 calls the cleaning program for brewing residue stored in the memory 450 through the processor 410 and executes the cleaning method for brewing residue provided in the embodiment of the present invention.

[0041] This invention provides a method for cleaning up residual brewing liquid, referring to... Figure 13 , Figure 13 This is a schematic flowchart of the first embodiment of a method for cleaning up residual brewing liquid according to the present invention.

[0042] In this embodiment, the method for cleaning up residual brewing liquid includes the following steps: Step A2: Control the movement of the two piston components into the brewing chamber 110; In this embodiment, before cleaning the brewing chamber 110 and / or the liquid transfer line, it is necessary to first ensure that both pistons are located within the brewing chamber 110. It should be noted that controlling the movement of the two pistons into the brewing chamber 110 includes, but is not limited to, at least one piston being located inside the brewing chamber 110. This can be either both pistons being fully movable inside the brewing chamber 110, or one piston being movable inside the brewing chamber 110 while the other piston is movable to be flush with the corresponding upper or lower opening.

[0043] This design does not restrict the timing of cleaning the brewing residue. Depending on actual needs, the cleaning operation can be performed after one or at least two slag removal operations or after cleaning the entire brewing pipeline. The slag removal operation can be performed after one or at least two beverage preparation operations. Preferably, after each beverage preparation, at least one slag removal operation is performed from the brewing tank 100, followed by at least one cleaning operation of the brewing residue. The beverage preparation operation is the process of brewing and extracting the powder to obtain the beverage. Specifically, the beverage preparation operation includes: controlling the first piston 210 to be positioned inside the brewing chamber 110, covering the lower opening of the brewing chamber 110, and reserving sufficient space for receiving powder within the brewing chamber 110. The second piston 220 is discharged outward from the brewing chamber 110, opening the upper opening of the brewing chamber 110 to allow powder to enter the brewing chamber 110. Then, the second piston 220 moves from its upper opening into the brewing chamber 110. The first piston 210 and / or the second piston 220 move toward each other, thus pressing the powder into a cake. Finally, the water supply pipe 320 is connected to the brewing chamber 110, and high-temperature hot water is supplied to the brewing chamber 110 to brew and extract the powder cake to obtain a beverage.

[0044] It is understandable that the residue to be removed during the slag removal operation can generally be the residue cake remaining after brewing and extraction, or the residue remaining in the brewing chamber 110 after brewing. The slag removal operation can specifically include, but is not limited to: In one embodiment, at least one of the two piston members is disengaged outward from the brewing chamber 110 to form an opening at the brewing tank 100. Based on this, step A2 may further include: Step A11: Control at least one piston to detach from the brewing chamber 110; Step A12: Control another piston to move toward the opening so that the residue in the brewing chamber 110 is discharged outward through the opening.

[0045] Please combine Figures 4 to 7 Specifically, in one embodiment, when the two pistons are the first piston 210 and the second piston 220 as described above, an upper slag discharge operation can be optionally performed, that is: Control the second piston 220 to be discharged upward from inside the brewing chamber 110 to outside the brewing chamber 110; and, The first piston 210 is controlled to move upward at least until it is flush with the upper opening of the brewing chamber 110, so as to discharge the residue in the brewing chamber 110 upward.

[0046] It is understood that the first piston 210's first movement stroke within the brewing cylinder is greater than the second piston 220's movement stroke. Firstly, based on the aforementioned beverage preparation operation, the second piston 220 is moved upwards until it is discharged outwards through the upper opening of the brewing chamber 110, thus opening the upper opening of the brewing chamber 110. Then, the first piston 210 is controlled to move upwards within the brewing chamber 110. Since the outer peripheral wall of the first piston 210 and the inner wall of the brewing chamber 110 maintain a sealed contact, during the movement, the residue received at the upper end of the first piston 210, as well as the residue remaining on the inner wall of the brewing chamber 110, can be moved upwards by the first piston 210. The first piston 210 can be moved upwards at least to be flush with the upper opening of the brewing chamber 110, or it can be moved further upwards to extend upwards from the upper opening of the brewing chamber 110, so that subsequent scrapers can scrape off the residue cake on the first piston 210. Alternatively, the residue cake can be pushed out laterally by rotating the brewing cylinder 100 or by other means, including but not limited to mechanical active pushing; or it can be used for subsequent cleaning of the residue on the first piston 210 by water.

[0047] The distance H1 by which the second piston 220 moves upward away from the upper opening of the brewing chamber 110 is greater than the thickness H0 of the residue cake, so that the residue cake can be completely pushed out of the brewing chamber 110 without being blocked by the second piston 220.

[0048] Please combine Figures 8 to 11 In another embodiment, when the two pistons are the first piston 210 and the second piston 220 as described above, a slag discharge operation can be optionally performed, that is: Control the first piston 210 to be discharged downward from inside the brewing chamber 110 to outside the brewing chamber 110; The second piston 220 is controlled to move downwards at least until it is flush with the lower opening of the brewing chamber 110, so as to discharge the residue in the brewing chamber 110 downwards.

[0049] It is understood that the first piston 210's first movement stroke within the brewing chamber is less than the movement stroke of the second piston 220. Following the aforementioned beverage preparation operation, the first piston 210 is moved downwards until it is discharged outwards through the lower opening of the brewing chamber 110, thus opening the lower opening of the brewing chamber 110. During this process, some of the residue collected at the upper end of the first piston 210 is carried away from the brewing chamber 110 by the first piston 210, and can then be scraped off by a scraper, or cleaned by water. Next, the second piston 220 is controlled to move downwards within the brewing chamber 110. Because the outer peripheral wall of the second piston 220 and the inner wall of the brewing chamber 110 remain in sealed contact, during the translation process, the residue cake remaining on the inner wall of the brewing chamber 110 can be moved downwards by the second piston 220 and finally discharged outwards through the lower opening of the brewing chamber 110. The second piston 220 is at least translated downwards to be flush with the lower opening of the brewing chamber 110, or it can be further translated downwards to extend downwards from the lower opening of the brewing chamber 110, to ensure that the residue remaining on the inner wall of the brewing chamber 110 can be completely scraped off.

[0050] In a preferred embodiment, the distance H2 by which the first piston 210 moves downward away from the lower opening of the brewing chamber 110 is less than the thickness H0 of the slag cake. This prevents the slag cake from adhering to the upper surface of the first piston 210 due to gravity and becoming unremovable as the first piston 210 moves. In the above embodiment, the upper slag discharge operation can control the first piston 210 to move upward until it is fully extended from the upper opening, or to move upward until it is flush with the upper opening; the lower slag discharge operation can control the second piston 220 to move downward until it is fully extended from the lower opening, or to move downward until it is flush with the lower opening. The specific settings can be made according to actual needs. When the first piston 210 moves to be flush with the upper opening and the second piston 220 moves to be flush with the lower opening, it helps to minimize the stroke of the first piston 210 / second piston 220 while still achieving the purpose of slag discharge.

[0051] It should be noted that in both of the preferred embodiments described above, whether it is the upper or lower slag discharge operation, a relative displacement needs to occur between at least one piston and the brewing cylinder 100. This relative displacement can be achieved by keeping the brewing cylinder 100 stationary and directly driving the first piston 210 and / or the second piston 220 to move horizontally via a drive mechanism; or it can be achieved by keeping the first piston 210 and / or the second piston 220 stationary and moving the brewing cylinder 100 by means of, for example, rotating, translating, or other methods. In other embodiments, such as the upper slag discharge operation, the piston and the brewing cylinder 100 can be controlled to not have a relative displacement, and a robotic arm can be used to scrape off the slag cake.

[0052] Of course, the cleaning of residual brewing liquid can also be automatically executed by the program in conjunction with other working modes. For example, it can be set to perform one or more cleaning operations when the machine is turned on or restarted after a preset interval. Or it can be set to perform one or more cleaning operations after a preset working time, and so on.

[0053] The cleaning of residual brewing liquid can also be triggered directly by the user's manual operation. For example, a trigger can be preset on the display and control panel of the machine. When the user triggers the trigger, the machine will automatically perform the cleaning operation of residual brewing liquid.

[0054] Before performing step A2, if the first piston 210 and / or the second piston 220 are outside the brewing chamber 110, then it is necessary to move the first piston 210 and / or the second piston 220 into the brewing chamber 110. If the first piston 210 and / or the second piston 220 are already inside the brewing chamber 110, then this step is assumed to have been completed.

[0055] Furthermore, in step A2, both the first piston 210 and the second piston 220 move into the brewing chamber 110, but the distance between them is not limited and can be specifically set according to subsequent operations (e.g., step A3). The first piston 210 and the second piston 220 can be completely abutted, or they can be spaced apart by a preset distance, thus defining a first chamber between the first piston 210 and the second piston 220.

[0056] Step A3: Control at least one piston to move closer to or further away from another piston to drive the residual brewing liquid out of the liquid passage.

[0057] In this embodiment, the upper opening of the brewing chamber 110 is closed by the second piston member 220, and the lower opening of the brewing chamber 110 is closed by the first piston member 210. A first chamber is defined between the first piston member 210 and the second piston member 220. The liquid passage can be connected to the first chamber by, for example, controlling the valve body to be in an open state. At this time, when at least one piston member moves closer to or away from the other piston member, the internal and external pressure difference between the first chamber and the liquid passage can be changed, thereby driving the brewing residual liquid in the brewing chamber 110 and / or the liquid passage to move towards the target area.

[0058] It is important to emphasize that in a brewing module or brewing device, there can be only one liquid-passing pipeline, or several as needed. Each liquid-passing pipeline can be connected by a separate valve body, or at least two liquid-passing pipelines can share a valve body, to achieve conduction and cut-off control between the liquid-passing pipeline and the first chamber. In this case, one of the liquid-passing pipelines is the first pipeline, and the remainder is the second pipeline. Therefore, step A3 can specifically include: Step A34: Control the first pipeline to be connected to the brewing chamber 110 and isolate each second pipeline from the brewing chamber 110; It is understood that the upper opening of the brewing chamber 110 is closed by the second piston 220, and the lower opening of the brewing chamber 110 is closed by the first piston 210. Therefore, in this step, it is necessary to ensure that only the first pipeline is connected to the brewing chamber 110, while the remaining second pipelines are isolated from the brewing chamber 110. The first pipeline that is simultaneously connected to the brewing chamber 110 can be one or at least two. The other end of the first pipeline that is not connected to the brewing chamber 110 remains open.

[0059] Step A35: Control at least one piston to move closer to or further away from another piston to drive the residual brewing liquid out of the first pipeline.

[0060] It is understood that by manipulating at least one piston to move closer to or further away from another piston, the pressure difference inside and outside the first pipeline can be changed, thereby driving the brewing chamber 110 and / or the brewing residue in the first pipeline to move towards the target area. Specifically, the first pipeline can be the waste discharge pipeline 310.

[0061] To ensure complete transfer of residual brewing liquid from the liquid-transferring pipeline to the target area, in a specific application, the volume change caused by the translational movement of the piston is set to be no less than the volume of the liquid-transferring pipeline. Taking the first pipeline as an example, the volume change caused by the translational movement of the piston is no less than the volume of the first pipeline. Specifically, the product of the translational distance of the piston and the maximum end area of ​​its piston head is R1, and the total volume of the section of the first pipeline connected to the brewing chamber 110 is R2. Therefore, R1 is no less than R2. Since R2 and the maximum end area of ​​the piston head in R1 are fixed, the translational distance of the piston can be adjusted.

[0062] The parameters such as the volume of the first pipeline and the volume change caused by the translational movement of the piston can be determined by directly calling the system default values, or by user input. Therefore, in one embodiment, the brewing module and / or brewing device further includes the input module as described above. The input module displays one or at least two preset parameters that can be operated by the user. The method for cleaning up the brewing residue specifically includes: Step C2: Control the movement of the two piston components into the brewing chamber; Step C3: Obtain the input value from the input module, and based on the input value, control at least one of the piston components to move closer to or further away from the other piston component, so as to drive the residual brewing liquid in the liquid passage to be discharged from the liquid passage.

[0063] It is understood that the preset parameters include the specifications of the liquid-passing pipeline and / or the movement parameters of the two piston components. The specifications of the liquid-passing pipeline can help determine, for example, the volume of the first pipeline, and may include, but are not limited to, the diameter, length, and material of the liquid-passing pipeline; the movement parameters of the two piston components are used to help determine, for example, the volume change caused by the translational movement of the piston components, and may include, but are not limited to, the translational distance of at least one piston component. The maximum end area of ​​the piston component, as mentioned above, can be obtained by calling the system default parameters.

[0064] In the above steps, specifically, only the first piston 210 may be translated, only the second piston 220 may be translated, or both the first piston 210 and the second piston 220 may be translated.

[0065] Specifically, in one embodiment, step A3 includes: Step A31: Control at least one piston to move closer to another piston so that the residual brewing liquid is pushed outward from the liquid passage.

[0066] Taking the first pipeline as an example, in this step, the target area refers to components such as a slag collection box or a water collection tank that are connected to the other end of the first pipeline. By operating the first piston 210 to move upward and / or the second piston 220 to move downward, the residual brewing liquid in the first chamber between them can be pushed towards the first pipeline, and the residual brewing liquid in the first pipeline can be pushed towards the slag collection box, water collection tank, etc., to achieve the purpose of discharging the residual brewing liquid in the brewing chamber 110 and / or the first pipeline. If this step is specifically adopted to discharge the residual brewing liquid, then in step A2 above, a sufficient translational distance needs to be reserved between the first piston 210 and the second piston 220 so that the residual brewing liquid in the brewing chamber 110 and / or the first pipeline can be completely pushed out.

[0067] Alternatively, in another embodiment, step A3 may also include: Step A32: Control at least one piston to move away from the other piston so that the brewing residue is drawn from the liquid passage into the brewing chamber 110. Step A33: Discharge the remaining brewing liquid in the brewing chamber 110.

[0068] Taking the liquid-passing pipeline as the first pipeline as an example, that is, in this embodiment, the target area is first inside the brewing chamber 110. Then, by discharging the residual brewing liquid in the brewing chamber 110 outward, the purpose of discharging the residual brewing liquid from the whole machine is achieved.

[0069] Specifically, when at least one of the two piston components can disengage from the brewing chamber 110 to form an opening at the brewing tank 100, step A33 may include: Step A331: Control at least one of the piston components to disengage from the brewing chamber 110 outwards; Step A332: Control another piston to move toward the opening so that the brewing residue in the brewing chamber 110 is discharged outward through the opening.

[0070] Specifically, when the first piston 210 can detach from the brewing chamber 110, the above step A331 can be specifically as follows: Step A333: Control the first piston 210 to move downward within the brewing chamber 110 until it is disengaged from the brewing chamber 110.

[0071] At this time, since the lower opening of the brewing tank 100 is open, and the brewing residue generally does not adhere too much to the inner wall of the brewing chamber 110, it will be discharged outward through the lower opening under the action of gravity.

[0072] Alternatively, when the second piston 220 can detach from the brewing chamber 110, step A331 above can specifically include: Step A334: Control the second piston 220 to move upward within the brewing chamber 110 until it disengages outside the brewing chamber 110; Step A335: Control the first piston 210 to move towards the upper opening so as to discharge the brewing residue in the brewing chamber 110 outward through the upper opening.

[0073] Specifically, firstly, the second piston 220 is moved upward within the brewing chamber 110 until it disengages outside the brewing chamber 110, opening the upper opening of the brewing chamber 110. Then, the first piston 210 is controlled to move upward horizontally. During the upward movement of the first piston 210, the residual brewing liquid collected within the brewing chamber 110 is moved upward synchronously. The first piston 210 is moved upward at least until it is flush with the upper opening of the brewing chamber 110, or it can be further moved upward until it extends upward from the upper opening of the brewing chamber 110, completely expelling the residual brewing liquid.

[0074] It should be noted that when the same brewing module / brewing equipment can independently and separately perform the slag discharge operation and the cleaning operation of the brewing residue according to a preset program, then, as much as possible, the slag discharge direction and the discharge direction of the brewing residue should be consistent, and the movement direction of each piston component should be controlled to be as similar as possible. Specifically, for example, when the first movement stroke of the first piston component 210 in a brewing equipment is greater than the second movement stroke of the second piston component 220, then in step A3 of the above-mentioned operation related to cleaning the brewing residue, the second piston component 220 can be fixed, and the first piston component 210 can be moved closer to or further away from the second piston component 220. The slag discharge method can specifically be top slag discharge. And step A3 can specifically include steps A334 to A335.

[0075] Conversely, when the first travel of the first piston 210 in a brewing device is less than the second travel of the second piston 220, then step S400 in the above-mentioned operation related to cleaning residual brewing liquid can specifically be configured such that the first piston 210 is fixed, and the second piston 220 is moved closer to or further away from the first piston 210. The slag discharge method can specifically be bottom discharge. And step A3 can specifically include step A333.

[0076] In view of the above, after performing one or more cleaning operations on the brewing chamber 110 and / or the liquid transfer line to remove residual brewing liquid (for example, step A35 can be performed), the following can also be selectively performed: Step A37: Connect the water injection pipe 320 to the brewing chamber 110 and inject clean water into the brewing chamber 110; Step A38: Discharge the remaining brewing liquid in the brewing chamber 110.

[0077] In this embodiment, by controlling the water injection pipe 320 to be connected to the brewing chamber 110, external clean water, high-temperature steam, etc., can be injected into the brewing chamber 110, thereby achieving the rinsing of the brewing chamber 110. In this process, taking the liquid passage including the first pipe as an example, the first pipe can be kept connected to the brewing chamber 110, that is, the first pipe can be rinsed at the same time; of course, the first pipe can also be kept isolated from the brewing chamber 110, that is, only the brewing chamber 110 is rinsed.

[0078] During the process of injecting external clean water or high-temperature steam into the brewing chamber 110, the first piston 210 and / or the second piston 220 may be discharged outside the brewing chamber 110, thus opening the upper and / or lower openings of the brewing chamber 110. At this time, by injecting water into the brewing chamber 110 with a volume not less than the current empty space of the brewing chamber 110, the entire empty space of the brewing chamber 110 can be flushed. During the flushing process, wastewater is continuously discharged. Specifically, if the first piston 210 moves into the brewing chamber 110 and the second piston 220 moves outside the brewing chamber 110, then the current empty space volume of the brewing chamber 110 is also the volume of the chamber between the upper surface of the first piston 210 and the upper opening of the brewing chamber 110. If the second piston 220 moves into the brewing chamber 110 and the first piston 210 moves out of the brewing chamber 110, then the volume of the currently empty space in the brewing chamber 110 is also the volume of the chamber between the lower end surface of the second piston 220 and the lower end opening of the brewing chamber 110. If both the first piston 210 and the second piston 220 move out of the brewing chamber 110, then the volume of the currently empty space in the brewing chamber 110 is also the total volume of the brewing chamber 110.

[0079] Alternatively, step A37 may include: Step A36: Control the movement of the two pistons until they are both located within the brewing chamber 110 and are spaced at a preset distance.

[0080] That is, during the process of injecting external clean water or high-temperature steam into the brewing chamber 110, both the first piston 210 and the second piston 220 move into the brewing chamber 110, keeping both the upper and lower openings of the brewing chamber 110 closed. At this time, by injecting water into the brewing chamber 110 with a volume not less than the current empty space of the brewing chamber 110, the entire empty space of the brewing chamber 110 can be rinsed. Furthermore, during the rinsing process, the upper surface of the first piston 210 and the lower surface of the second piston 220 can also be rinsed simultaneously. The current empty space of the brewing chamber 110 is the volume of the chamber between the upper surface of the first piston 210 and the lower surface of the second piston 220.

[0081] Then, step A38 can be referred to step A33 above. That is, it can be specifically step A333; or it can include steps A334 to A335.

[0082] In the technical solution provided by this invention, the outer peripheral sidewall of the piston member and the sidewall of the brewing chamber 110 are sealed and abutted together. This allows the two piston members to jointly enclose and define the brewing chamber 110 located between the two piston members and the liquid passage connecting the brewing chamber 110 when both piston members are moved to the position within the brewing chamber 110. Then, by operating at least one piston member to move closer to or further away from the other piston member, the residual brewing liquid remaining in the brewing chamber 110 and / or the liquid passage can be concentrated and drawn into the brewing chamber 110 or concentrated and pushed to the outlet end of the liquid passage. This facilitates the timely recovery and treatment of the residual brewing liquid, effectively preventing abnormalities such as deterioration, pollution, and blockage of the pipeline due to the long-term retention of the residual brewing liquid, and has the characteristics of simple operation.

[0083] Based on one or more of the above embodiments, it can be understood that a more preferred embodiment of the present invention is to use a suction method to draw the residual brewing liquid into the brewing tank 100. Therefore, specifically in one application, the method for cleaning the residual brewing liquid includes: Step B2: Place two pistons inside the brewing tank 100 and move them away in opposite directions to form a sealed enlarged space inside the brewing tank 100. The enlarged space draws the brewing residue in the liquid passage into the brewing tank 100. Step B3: Control at least one piston to disengage from the brewing tank 100 so that the brewing residue in the brewing chamber 110 can be discharged outward through the opening.

[0084] In this embodiment, the residual brewing liquid is drawn into the brewing tank 100 using a suction method. This provides a simple, efficient, and convenient way to clean residual brewing liquid from the liquid passage, minimizing the impact on the efficiency of continuously cyclical brewing operations (such as beverage preparation). Especially in practical use, during the intervals between preset brewing operations, this method of cleaning residual brewing liquid can empty the liquid passage between the brewing tank 100 and the beverage outlet, ensuring the quality of each cup of beverage prepared in subsequent brewing operations.

[0085] Specifically, the brewing tank 100 is generally cylindrical and has a brewing central axis X0. The brewing central axis X0 can be vertically arranged along the direction of gravity (i.e., the up and down direction mentioned above), or horizontally arranged perpendicular to the direction of gravity, or inclined at any angle between the direction of gravity and the horizontal direction, all of which can achieve the technical effects of the present invention.

[0086] The first piston member 210 has a first central axis X1, and the second piston member 220 has a second central axis X2. When both the first piston member 210 and the second piston member 220 are disposed within the brewing tank 100, the first central axis X1, the second central axis X2, and the brewing central axis X0 are collinear and overlap. At least one of the first piston member 210 or the second piston member 220 can disengage from the brewing tank 100, creating an exposed opening (e.g., a lower or upper opening) to discharge residual brewing liquid.

[0087] Specifically, as the first piston 210 moves downward within the brewing chamber 110 until it is detached from the brewing chamber 110, the second central axis X2 and the brewing central axis X0 remain collinear and overlapped, while the first central axis X1 deviates from the brewing central axis X0 to make way for the second piston 220 to move towards the first piston 210 within the brewing chamber 110, thereby driving the residual liquid in the brewing chamber 110 to be discharged.

[0088] It should be noted that during the movement of the first piston 210 and the second piston 220, it is not required that the first piston 210 and the second piston 220 necessarily move synchronously. For example, the step of the first central axis X1 deviating from the brewing central axis X0 must be completed at least before the step of the second piston 220 moving towards the first piston 210 within the brewing chamber 110, thereby ensuring that the first piston 210 does not cause interference or obstruction during the entire process of discharging the brewing residue.

[0089] Of course, the deviation between the first central axis X1 and the brewing central axis X0 is achieved by the relative displacement between the first piston 210 and the brewing cylinder 100. In this case, the first piston 210 and the brewing cylinder 100 can move directly along the first direction, making the first central axis X1 collinear with the brewing central axis X0, but the lower openings of the first piston 210 and the brewing cylinder 100 are spaced apart along the first direction. Alternatively, the first piston 210 and the brewing cylinder 100 can move laterally perpendicular to the first direction, causing the first central axis X1 to deviate laterally from the brewing central axis X0, and the first central axis X1 and the brewing central axis X0 to be approximately parallel. Alternatively, the first piston 210 and the brewing cylinder 100 can move in any direction relative to the first direction and / or laterally inclined, causing the first central axis X1 to deviate obliquely from the brewing central axis X0, and the first central axis X1 and the brewing central axis X0 intersect to form an angle greater than 0° and less than 180°.

[0090] Then, as the second piston 220 moves upward within the brewing chamber 110 until it is detached from the brewing chamber 110, the first central axis X1 is collinear with the brewing central axis X0, and the second central axis X2 is collinear with or deviates from the brewing central axis X0, so as to make way for the first piston 210 to move towards the second piston 220 within the brewing chamber 110, thereby driving the residual liquid in the brewing chamber 110 to be discharged.

[0091] Similarly, during the movement of the first piston 210 and the second piston 220, it is not required that the first piston 210 and the second piston 220 necessarily move synchronously. For example, the step of selectively making the second central axis X2 collinear or deviating from the brewing central axis X0 must be completed at least before the step of the first piston 210 moving towards the second piston 220 within the brewing chamber 110, thereby ensuring that the second piston 220 does not cause interference or obstruction during the entire process of discharging the brewing residue.

[0092] Of course, the deviation of the second central axis X2 from the brewing central axis X0 is achieved by the relative displacement between the second piston 220 and the brewing cylinder 100. In this case, the second piston 220 and the brewing cylinder 100 can move directly along the first direction, making the second central axis X2 collinear with the brewing central axis X0, but the upper openings of the second piston 220 and the brewing cylinder 100 are spaced apart along the first direction. Alternatively, the second piston 220 and the brewing cylinder 100 can move laterally perpendicular to the first direction, causing the second central axis X2 to deviate laterally from the brewing central axis X0, and the second central axis X2 to be approximately parallel to the brewing central axis X0. Alternatively, the second piston 220 and the brewing cylinder 100 can move in any direction relative to the first direction and / or laterally inclined, causing the second central axis X2 to deviate obliquely from the brewing central axis X0, and the second central axis X2 to intersect the brewing central axis X0 to form an angle greater than 0° and less than 180°.

[0093] Based on one or more of the above embodiments, in a practical application scenario, the method for cleaning up residual brewing liquid includes: Step S1: After confirming that the brewing is complete, control at least one piston to move outward from the brewing tank 100 in the first direction; Step S2: Control another piston to move along the first direction and push the residue in the brewing tank 100 out of the brewing tank 100; Step S3: Control the piston located in the brewing tank 100 to reciprocate in the direction of approaching and moving away from the opening; Step S4: Control the piston, which is detached from the brewing tank 100, to reciprocate in the direction of approaching and moving away from the opening; Step S5: After controlling the two pistons to move into the brewing tank 100, move them away in opposite directions; Steps S1 and S2 are executed at least once in a loop.

[0094] In one specific embodiment of the present invention, a first piston 210 and a second piston 220 are movably disposed within a brewing cylinder 100 along the brewing center axis X0. The second piston 220 is positioned above the first piston 210 in a first direction. The second piston 220 can disengage upward from the brewing cylinder 100 to provide an upper opening for the first piston 210 to push out residual brewing liquid from the brewing cylinder 100. After the beverage is brewed, the second piston 220 moves upward along the brewing center axis X0 and opens the upper opening of the brewing cylinder 100. The first piston 210 moves towards the second piston 220 (upward) to at least the edge of the brewing cylinder 100 and pushes out the waste residue within the brewing cylinder 100. Subsequently, the brewing cylinder 100 is rotated to scrape off the waste residue using an external baffle or an active method. After the waste residue is scraped off, the brewing cylinder 100 returns to its original position, and the second piston 220 moves in the opposite direction a distance K1 within the brewing cylinder 100. The distance K1 must be sufficient to allow the second piston 220 to re-move into the brewing cylinder 100 and seal the inner diameter of the brewing cylinder 100. Then, the first piston 210 and the second piston 220 coaxially move away from each other in opposite directions within the brewing cylinder 100, moving a distance K2 away. Specifically, one of the first piston 210 or the second piston 220 may remain fixed while the other moves away from the fixed piston, or both the first piston 210 and the second piston 220 may move away from each other. Preferably, the second piston 220 covers and fixes the upper opening of the brewing cylinder 100, and the first piston 210 moves downwards, forming a distance K2 away from the second piston 220.

[0095] In another specific embodiment of the present invention, the first piston member 210 and the second piston member 220 are movably disposed within the brewing cylinder 100 along the brewing center axis X0. The second piston member 220 is positioned above the first piston member 210 in a first direction. The first piston member 210 can move downward to disengage from the brewing cylinder 100, providing a lower opening for the second piston member 220 to push the remaining brewing liquid downward in the brewing cylinder 100. After the beverage is brewed, the first piston member 210 moves downward along the brewing center axis X0 and opens the lower opening of the brewing cylinder 100. The second piston member 220 moves towards the first piston member 210 (downward) to at least the edge of the brewing cylinder 100 and pushes the waste residue outward. Subsequently, the brewing cylinder 100 is rotated to scrape off the waste residue using an external baffle or an active method. After the waste residue is scraped off, the brewing cylinder 100 returns to its original position, and the first piston member 210 moves in the opposite direction a distance K1 within the brewing cylinder 100. The distance K1 must be such that the first piston 210 moves back into the brewing cylinder 100 and forms a seal on the inner diameter of the brewing cylinder 100. Then, the first piston 210 and the second piston 220 move coaxially and in opposite directions away from each other within the brewing cylinder 100, moving a distance K2 away. Specifically, one of the first piston 210 or the second piston 220 may remain fixed while the other moves away from the fixed piston, or both the first piston 210 and the second piston 220 may move away from each other. Preferably, the first piston 210 covers and fixes itself at the lower opening of the brewing cylinder 100, and the second piston 220 moves upward to form a distance K2 away from the first piston 210.

[0096] In the above embodiment, the liquid passage includes a first passage and a second passage. The first passage is the liquid outlet passage, which connects the beverage outlet and the second piston. The length of the liquid outlet passage is L, and the inner diameter is r. The interior of the brewing tank 100 is preferably a regular cylindrical shape with an inner diameter of R, where πr²L ≤ πR²K². This allows for the calculation of the minimum K² distance between the first piston 210 and the second piston 220, preventing excessive strokes that could reduce efficiency.

[0097] Preferably, during the travel stroke K2 of the first piston 210 and the second piston 220, the first pipe is open and the second pipe is closed, causing the residual liquid in the first pipe to be drawn into the brewing tank 100. After the second piston 220 moves upward away from the brewing tank 100, the first piston 210 moves upward to a position not lower than the upper surface of the brewing tank 100, pushing the waste liquid drawn into the brewing tank 100 outward. Subsequently, optionally, the brewing tank 100 and the first piston 210 move together, relying on a baffle for cleaning waste residue or an active method to clean the residual liquid.

[0098] As can be seen from the above, in practical applications: When the liquid passage includes a waste discharge pipe connected to the first piston member 210 and a liquid outlet pipe connected to the second piston member 220, as described above, the liquid outlet pipe connects the brewing chamber 110 and the beverage outlet of the entire machine. The first piston member 210 and the second piston member 220 are located within the brewing chamber 110 and form a sealed space with the brewing cylinder 100. Residual liquid in the liquid outlet pipe can be drawn back into the brewing chamber 110 when the first piston member 210 and the second piston member 220 are far apart and a negative pressure is formed within the brewing chamber 110.

[0099] Specifically, the second piston 220 is located vertically above the first piston 210 within the brewing tank 100, and the residual liquid drawn into the brewing chamber 110 accumulates above the first piston 210. At this time, the residual liquid accumulated at the first piston 210 within the brewing chamber 110 can be discharged by at least one of the following methods: The first piston 210 disengages downward from the brewing tank 100, forming an opening at the lower end of the brewing tank 100, from which residual liquid is discharged; or, The second piston 220 disengages upward from the brewing tank 100, forming an opening at the upper end of the brewing tank 100. The first piston 210 then pushes the remaining liquid outward from the opening at the upper end of the brewing tank 100; or... The first piston 210 is connected to the waste discharge pipe 310, and the residual rinsing liquid is discharged from the first piston 210 and the waste discharge pipe 310.

[0100] In addition, when the residual brewing liquid is discharged through the waste drain pipe 310, one of the following methods can be selected: The first piston 210 and the second piston 220 move closer to each other, and a closable valve body is provided on the liquid outlet pipe connected to the second piston 220.

[0101] Alternatively, a suction pump body is provided from the first piston 210 to the waste discharge pipe 310, wherein the channels from the waste discharge pipe 310 to the liquid outlet pipe are all connected.

[0102] The first piston 210 and the waste discharge pipe 310 mentioned above are equipped with valves for connecting to the hot water boiler and are designed to allow for either connection or complete disconnection / closure.

[0103] The first piston 210 and the second piston 220 clamp the powder cake in the brewing chamber 110 of the brewing tank 100 for extraction. The direction in which the residue cake after extraction is discharged from the brewing chamber 110 is the same as the direction in which the brewing residue is discharged.

[0104] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0105] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory 450 (ROM) / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method of cleaning a brew residue, applied to a brewing device, characterized in that, The brewing device comprises a brewing cylinder with a brewing cavity, two piston members arranged in the brewing cavity and a liquid passage connected with the brewing cavity. The cleaning method of the brewing residual liquid comprises: controlling the two piston members to move to seal the brewing cavity; controlling at least one of the piston members to move close to the other piston member to drive the brewing residual liquid to be pushed out from the liquid passage.

2. The method of claim 1, wherein, In the step of controlling at least one of the piston members to move close to the other piston member to drive the brewing residual liquid to be pushed out from the liquid passage, the volume change of the piston members is not less than the volume of the liquid passage.

3. The method for cleaning a brew residue according to any one of claims 1 to 2, characterized in that, The liquid passage is provided with a plurality of first passages and second passages; The step of controlling at least one of the piston members to move close to the other piston member to drive the brewing residual liquid to be pushed out from the liquid passage comprises: controlling the first passage to be connected with the brewing cavity and the second passages to be disconnected with the brewing cavity; controlling at least one of the piston members to move close to the other piston member to drive the brewing residual liquid to be pushed out from the first passage.

4. The method for cleaning residual brewing liquid as described in claim 3, characterized in that, The first passage is a waste discharge passage; and / or, The first passage is a liquid outlet passage connected with a beverage outlet of the brewing device; and / or, One of the second passages is a water injection passage; and / or, The brewing cavity penetrates the brewing cylinder along the up-down direction, the two piston members are a first piston member and a second piston member arranged in sequence from bottom to top, the first passage is a waste discharge passage, and the waste discharge passage penetrates the first piston member and is connected with the brewing cavity in an openable manner; and / or the first passage is a liquid outlet passage connected with a beverage outlet of the brewing device, and the liquid outlet passage penetrates the second piston member and is connected with the brewing cavity in an openable manner.

5. The method for cleaning residual brewing liquid as described in claim 3, characterized in that, One of the second passages is a water injection passage; After the step of controlling at least one of the piston members to move close to the other piston member to drive the brewing residual liquid to be pushed out from the first passage, the method further comprises: controlling the water injection passage to be connected with the brewing cavity and injecting clean water into the brewing cavity; discharging the brewing residual liquid in the brewing cavity.

6. The method of cleaning a brew residue of claim 5, wherein, Before the step of controlling the water injection passage to be connected with the brewing cavity and injecting clean water into the brewing cavity, the method further comprises: controlling the two piston members to be arranged in the brewing cavity and spaced apart by a preset distance.

7. The method of cleaning a brew residue of claim 5, wherein, The injection amount of the clean water is not less than the volume of the current empty space of the brewing cavity.

8. A method of cleaning a brew residue according to any one of claims 5 to 7, wherein, At least one of the two piston members can be separated from the brewing cavity to form an opening at the brewing cylinder; The step of discharging the brewing residual liquid in the brewing cavity comprises: controlling at least one of the piston members to be separated from the brewing cavity; controlling the other piston member to move towards the opening to discharge the brewing residual liquid in the brewing cavity out of the opening.

9. A method of cleaning a brew residue according to any one of claims 5 to 7, wherein, The brewing cavity penetrates the brewing cylinder along the up-down direction, the two piston members are a first piston member and a second piston member arranged in sequence from bottom to top, and the first piston member can be separated from the brewing cavity to form an opening at the brewing cylinder. The step of discharging the brewing residual liquid in the brewing chamber outwards comprises: controlling the first piston member to move downwards in the brewing chamber to disengage outwards of the brewing chamber.

10. The method of cleaning a brew residue according to any one of claims 5 to 7, wherein, The brewing chamber is vertically through the brewing cylinder, and the two piston members are a first piston member and a second piston member arranged in sequence from bottom to top, respectively. The step of discharging the brewing residual liquid in the brewing chamber outwards comprises: controlling the second piston member to move upwards in the brewing chamber to disengage outwards of the brewing chamber. controlling the first piston member to move towards the opening to discharge the brewing residual liquid in the brewing chamber outwards through the opening.

11. The method of claim 1, wherein, At least one of the two piston members can disengage outwards of the brewing chamber to form an opening at the brewing cylinder. Before the step of controlling the two piston members to move to seal the brewing chamber, the method further comprises: controlling at least one of the piston members to disengage outwards of the brewing chamber. controlling the other piston member to move towards the opening to discharge the dregs in the brewing chamber outwards through the opening.

12. The method of claim 11, wherein the cleaning of the brew residue is characterized by, In the step of controlling the other piston member to move towards the opening, the piston member moves to be flush with the opening.

13. The method of cleaning a brew residue according to any one of claims 11 to 12, wherein, When the steps of discharging the dregs outwards and discharging the brewing residual liquid outwards are performed, the moving directions of the piston members are the same, and the discharging directions are the same.

14. A method of cleaning a brew residue, applied to a brewing device, characterized in that, The brewing device comprises a brewing cylinder formed with a brewing chamber, two piston members movably arranged in the brewing chamber, a liquid passage connectable to and disconnectable from the brewing chamber, and an input module configured to input input values of preset parameters. The method for cleaning the brewing residual liquid comprises: controlling the two piston members to move in the brewing chamber. obtaining the input values input by the input module, and controlling at least one of the piston members to move towards the other piston member to drive the brewing residual liquid in the liquid passage to be discharged out of the liquid passage according to the input values.

15. The method for cleaning residual brewing liquid as described in claim 14, characterized in that, The preset parameters comprise specification parameters of the liquid passage and / or movement parameters of the two piston members.

16. A brewing apparatus, characterized in that The brewing module comprises a brewing cylinder formed with a brewing chamber, two piston members movably arranged relative to the brewing cylinder, a liquid passage connectable to and disconnectable from the brewing chamber through a valve body, and a driving mechanism configured to drive the piston members to move. The control device is electrically connected to the driving mechanism and the valve body, respectively, and comprises a memory, a processor, and a cleaning program of brewing residual liquid stored on the memory and executable on the processor, the cleaning program of brewing residual liquid being configured to implement the steps of the cleaning method of brewing residual liquid according to any one of claims 1 to 15. The storage medium stores the cleaning program of brewing residual liquid, and the cleaning program of brewing residual liquid is executed by the processor to implement the steps of the cleaning method of brewing residual liquid according to any one of claims 1 to 15. ​ 17. A storage medium, characterized by ​

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