Method for cleaning a brew residue, a brewing device and a storage medium

Abstract

The application discloses a brewing residual liquid cleaning method, a brewing device and a storage medium. The brewing residual liquid cleaning method comprises the following steps: controlling two piston members to move into a brewing cavity; and controlling at least one of the piston members to move close to or away from the other piston member, so as to drive the brewing residual liquid to be discharged from a liquid passing pipeline. According to the application, by moving at least one piston member close to or away from the other piston member, the brewing residual liquid remaining in the brewing cavity and / or the liquid passing pipeline can be sucked into the brewing cavity or pushed to the outlet end of the liquid passing pipeline, the brewing residual liquid can be recycled in time, and the brewing residual liquid can be prevented from being deteriorated, polluted and causing pipeline blockage for a long time, and the application has the characteristics of simple operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brewing equipment, in particular to a brewing residual liquid cleaning method, a brewing equipment and a storage medium. BACKGROUND

[0002] After each brewing, the brewing cylinder in the brewing equipment will extract the beverage in the brewing chamber outward through the pump body and the liquid outlet pipeline, for example, and the brewing residual liquid and the like remaining in the brewing chamber will be discharged outward through the waste discharge pipeline, for example. Or use water to clean up, discharge the residual liquid from the beverage outlet, which will affect the efficiency of beverage production, and the residual liquid will flow into the beverage because the beverage is not taken away in time after the beverage production is completed. In the long-term use process, the inner cavity of the brewing cylinder and the piston piece will be cleaned according to the set period, but the brewing residual liquid on the liquid outlet pipeline and the waste discharge pipeline is easy to form a stagnation, easy to deteriorate and form an odor, and to a certain extent, affect the preparation quality of the subsequent beverage. Especially in the journey of the pipeline from the brewing cylinder to the beverage outlet. SUMMARY

[0003] The main purpose of the present application is to provide a brewing residual liquid cleaning method, a brewing equipment and a storage medium, which aims to solve the problem that the brewing residual liquid in the liquid pipeline connected with the brewing chamber of the traditional brewing equipment is not cleaned in time, thereby reducing the brewing quality.

[0004] To achieve the above-mentioned purpose, the present application provides a brewing residual liquid cleaning method applied to a brewing equipment, wherein the brewing equipment comprises a brewing cylinder formed with a brewing chamber, two piston pieces arranged in the brewing chamber and capable of moving relatively, and a liquid pipeline connected with the brewing chamber in an on-off manner.

[0005] The brewing residual liquid cleaning method comprises the following steps.

[0006] Controlling the two piston pieces to move into the brewing chamber.

[0007] Controlling at least one of the piston pieces to move close to or away from the other piston piece to drive the brewing residual liquid to be discharged from the liquid pipeline.

[0008] Optionally, in the step of controlling at least one of the piston pieces to move close to or away from the other piston piece to drive the brewing residual liquid to be discharged from the liquid pipeline, the volume change amount generated by the movement of the piston pieces is not less than the volume of the liquid pipeline.

[0009] Optionally, the step of controlling at least one of the piston pieces to move close to or away from the other piston piece to drive the brewing residual liquid to be discharged from the liquid pipeline comprises:

[0010] controlling at least one of the piston members to approach the other piston member to drive the brewing residue out of the liquid passage.

[0011] Optionally, the step of controlling at least one of the piston members to approach or move away from the other piston member to drive the brewing residue out of the liquid passage comprises:

[0012] controlling at least one of the piston members to move away from the other piston member to drive the brewing residue into the brewing chamber from the liquid passage;

[0013] disconnecting the brewing residue in the brewing chamber from the liquid passage.

[0014] Optionally, the liquid passage is provided with a plurality of passages, which are a first passage and the rest of second passages;

[0015] the step of controlling at least one of the piston members to approach or move away from the other piston member to drive the brewing residue out of the liquid passage comprises:

[0016] controlling the first passage to be connected to the brewing chamber and each of the second passages to be disconnected from the brewing chamber;

[0017] controlling at least one of the piston members to approach or move away from the other piston member to drive the brewing residue out of the first passage.

[0018] Optionally, the first passage is a waste passage.

[0019] Optionally, one of the second passages is a water injection passage;

[0020] the step of controlling at least one of the piston members to approach or move away from the other piston member to drive the brewing residue out of the first passage comprises:

[0021] controlling the water injection passage to be connected to the brewing chamber and injecting clean water into the brewing chamber;

[0022] driving the brewing residue in the brewing chamber out.

[0023] Optionally, before the step of controlling the water injection passage to be connected to the brewing chamber and injecting clean water into the brewing chamber, the method further comprises:

[0024] controlling the two piston members to be arranged in the brewing chamber with a preset distance therebetween.

[0025] Optionally, the amount of clean water injected is not less than the volume of the current empty space in the brewing chamber.

[0026] Optionally, at least one of the two piston members is disengaged from the brewing chamber to form an opening at the brewing cylinder;

[0027] The step of discharging the brewing residue in the brewing chamber includes:

[0028] Controlling at least one of the piston members to be disengaged from the brewing chamber;

[0029] Controlling another of the piston members to move towards the opening to discharge the brewing residue in the brewing chamber through the opening.

[0030] Optionally, the brewing chamber extends through the brewing cylinder in an up-down direction, and 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 is disengaged from the brewing chamber to form an opening at the brewing cylinder;

[0031] The step of discharging the brewing residue in the brewing chamber includes:

[0032] Controlling the first piston member to move downwards in the brewing chamber to be disengaged from the brewing chamber.

[0033] Optionally, the brewing chamber extends through the brewing cylinder in an up-down direction, and the two piston members are a first piston member and a second piston member arranged in sequence from bottom to top, and the second piston member is disengaged from the brewing chamber to form an opening at the brewing cylinder;

[0034] The step of discharging the brewing residue in the brewing chamber includes:

[0035] Controlling the second piston member to move upwards in the brewing chamber to be disengaged from the brewing chamber.

[0036] Controlling the first piston member to move towards the opening to discharge the brewing residue in the brewing chamber through the opening.

[0037] Optionally, at least one of the two piston members is disengaged from the brewing chamber to form an opening at the brewing cylinder;

[0038] Before the step of controlling the two piston members to be arranged in the brewing chamber, the method further includes:

[0039] Controlling at least one of the piston members to be disengaged from the brewing chamber;

[0040] Controlling another of the piston members to move towards the opening to discharge the brewing residue in the brewing chamber through the opening.

[0041] Optionally, in the step of controlling the other piston member to move towards the opening, the piston member moves to be flush with the opening.

[0042] Optionally, in the steps of discharging the residue and discharging the brewing residue, the moving directions of the piston members are the same, and the discharging directions are the same.

[0043] In addition, to achieve the above object, the application further provides a brewing residue cleaning method applied to a brewing device, wherein the brewing device comprises a brewing cylinder with a brewing cavity, two piston members movably arranged in the brewing cylinder, and a liquid passage connected to the piston members in an on-off manner, at least one of the two piston members can be separated from the brewing cylinder to form an opening at the brewing cylinder;

[0044] The brewing residue cleaning method comprises the following steps:

[0045] The two piston members are arranged in the brewing cylinder and move away in opposite directions to form a closed enlarged space in the brewing cylinder, and the enlarged space sucks the brewing residue in the liquid passage into the brewing cylinder;

[0046] At least one of the piston members is controlled to be separated from the brewing cylinder, so that the brewing residue in the brewing cavity is discharged outwards through the opening.

[0047] Optionally, the liquid passage is provided with a plurality of liquid passages, which comprises a first liquid passage connected between one of the piston members and a beverage outlet of the brewing device, and a second liquid passage connected to the other piston member, and a valve body is arranged at the connection position of the two liquid passages, and the valve body is in a closed state when the brewing residue cleaning method is performed.

[0048] Optionally, the two piston members are a first piston member and a second piston member, the brewing cylinder has a brewing center axis X0, the first piston member and the second piston member have a first center axis X1 and a second center axis X2, respectively.

[0049] When the first piston member and the second piston member are arranged in the brewing cylinder, the first center axis X1, the second center axis X2 and the brewing center axis X0 are coincident.

[0050] Optionally, the first piston member can move away from the second piston member to be separated from the brewing cylinder and form the opening.

[0051] During the movement, the second central axis X2 is kept collinear with the brewing central axis X0, and the first central axis X1 is offset from the brewing central axis X0 to make room for the residual liquid in the brewing cavity to be discharged when the first piston moves in the brewing cavity towards the second piston.

[0052] Optionally, before the second piston moves in the brewing cavity towards the first piston, the first central axis X1 is offset from the brewing central axis X0.

[0053] Optionally, the second piston can move away from the first piston to be outwardly separated from the brewing cylinder and form the opening.

[0054] The first central axis X1 is collinear with the brewing central axis X0, and the second central axis X2 is collinear with or offset from the brewing central axis X0 to make room for the residual liquid in the brewing cavity to be discharged when the first piston moves in the brewing cavity towards the second piston.

[0055] Optionally, before the first piston moves in the brewing cavity towards the second piston, the second central axis X2 can be selectively offset from the brewing central axis X0.

[0056] Optionally, after the offset, the second central axis X2 is parallel to or intersected with the brewing central axis X0 to form an included angle.

[0057] Optionally, the two pistons are moved asynchronously.

[0058] In addition, to achieve the above-mentioned purposes, the present application also provides a cleaning method for residual liquid of a brewing device, wherein the brewing device comprises a brewing cylinder and at least one piston arranged in the brewing cylinder in a detachable manner, and the two pistons can be moved towards each other in the brewing cylinder to compress powder for brewing a beverage, and the brewing cylinder forms an opening after at least one of the pistons is separated.

[0059] The cleaning method for residual liquid of the brewing device comprises:

[0060] S1: after confirming that the brewing is completed, controlling at least one of the pistons to move outwardly away from the brewing cylinder in a first direction;

[0061] S2: controlling another piston to move in the first direction and push the residue in the brewing cylinder out of the brewing cylinder;

[0062] S3: controlling the piston in the brewing cylinder to reciprocate in the direction of approaching and moving away from the opening.

[0063] S4: controlling the piston member that is separated from the brewing cylinder to reciprocate in the direction close to and away from the opening to repeatedly seal the opening;

[0064] S5: controlling the two piston members to move away in opposite directions after being controlled to move into the brewing cylinder.

[0065] The S1 and the S2 are cyclically executed at least once.

[0066] Optionally, the two piston members are a first piston member and a second piston member respectively, and the brewing cylinder has a brewing central axis X0, and the first piston member and the second piston member have a first central axis X1 and a second central axis X2 respectively.

[0067] When the two piston members are arranged in the brewing cylinder, the first central axis X1, the second central axis X2 and the brewing central axis X0 are collinear.

[0068] After the S2 is executed and before the S3 is executed, the first central axis X1 or the second central axis X2 corresponding to the piston member that is separated from the brewing cylinder deviates from the brewing central axis X0 is controlled.

[0069] Optionally, after the deviation, the first central axis X1 or the second central axis X2 corresponding to the piston member that is separated from the brewing cylinder is parallel to or intersects with the brewing central axis X0 to form an included angle.

[0070] In addition, to achieve the above-mentioned purpose, the application further provides a brewing residual liquid cleaning method applied to a brewing device, wherein the brewing device comprises a brewing cylinder formed with a brewing cavity, two piston members arranged in the brewing cavity and capable of relative movement, a liquid passage connected to the brewing cavity in an on-off manner, and an input module for inputting input values of preset parameters.

[0071] The brewing residual liquid cleaning method comprises:

[0072] controlling the two piston members to move into the brewing cavity;

[0073] obtaining the input values input by the input module, and controlling at least one piston member to translate close to or away from another piston member according to the input values to drive the brewing residual liquid in the liquid passage to be discharged from the liquid passage.

[0074] Optionally, the preset parameters comprise specification parameters of the liquid passage and / or movement parameters of the two piston members.

[0075] In addition, to achieve the above-mentioned purpose, the application further provides a brewing device, which comprises:

[0076] The brewing device comprises a brewing cylinder formed with a brewing cavity, two piston members movably arranged relative to the brewing cylinder, a liquid passage connected to the brewing cavity through a valve body, and a driving mechanism for driving the piston members to move; and

[0077] The control device is electrically connected to the driving mechanism and the valve body, respectively, and comprises a memory, a processor, and a brewing residual liquid cleaning program stored in the memory and executable on the processor, which is configured to implement the steps of the brewing residual liquid cleaning method.

[0078] Optionally, the brewing device further comprises an input module for inputting input values of preset parameters.

[0079] In addition, to achieve the above object, the application further provides a storage medium having a brewing residual liquid cleaning program stored thereon, which is executable on a processor to implement the steps of the brewing residual liquid cleaning method.

[0080] In addition, to achieve the above object, the application further provides a brewing device comprising:

[0081] A brewing cylinder formed with a brewing cavity and two piston members arranged in the brewing cavity and movable towards or away from each other, wherein the two piston members comprise a first piston member and a second piston member;

[0082] A liquid passage connected to the two piston members and communicating for liquid flow, wherein the liquid passage comprises a waste discharge passage connected to the first piston member and a liquid outlet passage connected to the second piston member, and the liquid outlet passage communicates the brewing cavity with a beverage outlet;

[0083] The first piston member and the second piston member are located in the brewing cavity and form a sealed space with the brewing cylinder, and the residual liquid in the liquid outlet passage can be drawn back into the brewing cavity from the liquid outlet passage when the first piston member and the second piston member move away from each other and form a negative pressure in the brewing cavity.

[0084] Optionally, the second piston member is located above the first piston member in the vertical direction in the brewing cylinder, and the residual liquid drawn into the brewing cavity accumulates above the first piston member.

[0085] Optionally, the residual liquid accumulated in the brewing cavity at the first piston member can be discharged at least in one of the following ways:

[0086] The first piston member is separated from the brewing cylinder downwardly to form an opening at the lower end of the brewing cylinder, and the residual liquid is discharged from the opening at the lower end of the brewing cylinder; or

[0087] The second piston member is separated from the brewing cylinder upwardly to form an opening at the upper end of the brewing cylinder, and the first piston member pushes the residual liquid outwardly from the opening at the upper end of the brewing cylinder; or

[0088] The first piston member is communicated with the waste discharge pipeline, and the brewing residual liquid is discharged from the first piston member and the waste discharge pipeline.

[0089] Optionally, when the brewing residual liquid is discharged from the waste discharge pipeline, one of the following modes is selected:

[0090] The first piston member and the second piston member are moved close to each other, and a closable valve body is arranged on the liquid outlet pipeline connected to the second piston member; or

[0091] A suction pump is arranged on the waste discharge pipeline from the first piston member, and the channels of the waste discharge pipeline to the liquid outlet pipeline are all communicated.

[0092] Optionally, the first piston member and the waste discharge pipeline are provided with a valve body for connecting a brewing hot water boiler and being selectively communicated or completely disconnected.

[0093] Optionally, the first piston member and the second piston member hold the powder cake in the brewing cavity of the brewing cylinder for extraction, and the direction of the residue cake after the powder cake extraction is discharged from the brewing cavity is consistent with the direction of the brewing residual liquid discharge.

[0094] In the technical scheme provided by the application, the outer peripheral side wall of the piston member and the side cavity wall of the brewing cavity are sealed and abutted, so that when the two piston members are both moved into the brewing cavity, the brewing cavity between the two piston members and the liquid passage communicating the brewing cavity are jointly defined; and by moving at least one piston member close to or away from the other piston member, the brewing residual liquid remaining in the brewing cavity and / or the liquid passage can be concentrated and pumped into the brewing cavity or pushed to the outlet end of the liquid passage, which helps to timely recover and process the brewing residual liquid, effectively prevents abnormal phenomena such as deterioration, pollution and blockage of the pipeline caused by long-term residual brewing residual liquid, and has the characteristics of simple operation. In addition, when the brewing module is applied in a brewing device, the pipeline between the brewing cylinder and the beverage outlet does not need to be additionally provided with a pump or a bypass branch, but only needs a complete liquid passage, which helps to simplify the pipeline layout of the whole machine, avoids the accumulation of beverages in the pipeline, and is convenient to clean at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0095] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0096] Figure 1 The longitudinal section schematic view of the first embodiment of the brewing module provided by the present application;

[0097] Figure 2 The longitudinal section schematic view of the second embodiment of the brewing module provided by the present application;

[0098] Figure 3 The longitudinal section schematic view of the third embodiment of the brewing module provided by the present application;

[0099] Figure 4 The schematic view of the brewing module provided by the present application in the initial state when performing the upper slagging operation;

[0100] Figure 5 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application; Figure 4 The schematic view of the second piston after moving up in the brewing module provided by the present application;

[0101] Figure 6 The schematic view of the first piston after moving up in the brewing module provided by the present application; Figure 4 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application;

[0102] Figure 7 The schematic view of the first piston after moving up in the brewing module provided by the present application; Figure 4 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application;

[0103] Figure 8 The schematic view of the brewing module provided by the present application in the initial state when performing the lower slagging operation;

[0104] Figure 9 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application; Figure 8 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application;

[0105] Figure 10 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application; Figure 8 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application;

[0106] Figure 11 The schematic view of the first piston in the first piston moving process in the brewing module provided by the present application; Figure 8 The schematic view of the second piston after moving up in the brewing module provided by the present application;

[0107] Figure 12 The structural schematic view of the control device of the hardware running environment related to the embodiments of the present application;

[0108] Figure 13A flow chart of an embodiment of the cleaning method of the brewing residual liquid provided by the present application.

[0109] BRIEF DESCRIPTION OF DRAWINGS

[0110] 100 brewing cylinder; 110 brewing cavity; 210 first piston piece; 220 second piston piece; 310 waste discharge pipeline; 320 water injection pipeline; 330 three-way valve; 340 liquid outlet pipeline; 350 on-off valve; 400 control device; 410 processor; 420 communication bus; 430 user interface; 440 network interface; 450 memory.

[0111] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0112] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0113] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0114] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the meaning of “and / or” appearing throughout the text includes three parallel solutions. Taking “A and / or B” as an example, it includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0115] Please refer to Figures 1 to 12The present application provides a brewing device, which comprises a brewing module and a control device 400. The brewing module comprises a brewing cylinder 100 with a brewing cavity 110, two piston members arranged in the brewing cavity 110 and movable relative to the brewing cylinder 100, a liquid passage connected to the brewing cavity 110 through a valve body, and a driving mechanism for driving the piston members to move. The liquid passage can be one or at least two. When the liquid passage is at least two, each liquid passage is a first passage and a second passage. The control device 400 is electrically connected to the driving mechanism and the valve body.

[0116] The brewing module is mainly used for brewing and extracting powder materials such as coffee powder, soybean powder and tea leaves, and finally obtaining coffee, soy milk and tea drinks. The brewing cavity 110 is arranged along the first direction in the brewing cylinder 100. The first direction is not limited, and can be set to any direction according to actual needs. For example, the brewing cylinder 110 can be arranged in the upward direction, or arranged in the horizontal direction or inclined relative to the upward direction / horizontal direction, which is within the protection scope of the present application. In order to facilitate understanding, in the following embodiments, the first direction is the gravity direction, i.e. the upward direction, and the brewing cavity 110 is arranged along the upward direction in the brewing cylinder 100. At this time, the brewing cavity 110 corresponds to two openings, i.e. an upper opening and a lower opening. Correspondingly, at least in the brewing cavity 110, the two piston members are arranged in sequence along the upward direction, and at least one of them has a moving stroke along the upward direction. In order to facilitate understanding, the following defines the two piston members as a first piston member 210 and a second piston member 220 arranged in sequence from bottom to top at least in the brewing cavity 110. The first piston member 210 can be selectively moved out of the brewing cavity 110 and can enter the brewing cavity 110 through the lower opening of the brewing cavity 110, and the first piston member 210 has a first moving stroke along the upward direction in the brewing cavity 110. And / or, the second piston member 220 can be selectively moved out of the brewing cavity 110 and can enter the brewing cavity 110 through the upper opening of the brewing cavity 110, and the second piston member 220 has a second moving stroke along the upward direction in the brewing cavity 110.

[0117] The brewing module can further comprise at least one set of driving mechanism. The driving mechanism is drivingly connected with the first piston member 210 and / or the second piston member 220 to drive the first piston member 210 and / or the second piston member 220 to move. The driving mechanism is electrically connected with the control device 400, so that the first piston member 210 and / or the second piston member 220 can be intelligently and automatically driven under the control of the control device 400.

[0118] The brewing module can further comprise a plurality of liquid passing pipes which are in turn connectable with the brewing chamber 110. The liquid passing pipe is a pipe through which liquid can pass. The liquid passing pipe can be, for example, a water injection pipe 320 which connects an external water source to the brewing chamber 110. The water injection pipe 320 is in communication with an external water source or a brewing hot water boiler, and when the water injection pipe 320 is in communication with the brewing chamber 110, water from the external water source is injected into the brewing chamber 110. The water provided by the water source can be, but is not limited to, normal temperature, high temperature or low temperature clean water, high temperature steam, etc. The liquid passing pipe can also be, for example, a liquid outlet pipe, a waste liquid outlet pipe 310, etc. which connects the liquid in the brewing chamber 110 to the outside. The liquid outlet pipe can discharge the beverage prepared in the brewing chamber 110 to, for example, a beverage outlet when it is in communication with the brewing chamber 110. The waste liquid outlet pipe 310 can discharge the waste liquid in the brewing chamber 110 to, for example, a waste liquid tank when it is in communication with the brewing chamber 110.

[0119] The liquid passing pipe and the brewing chamber 110 are connected in a manner that can be connected or disconnected, for example, by a valve. There are many types of valves, and the valve can be, for example, a three-way valve 330, a switch valve, etc. The driving force for the liquid to pass between the liquid passing pipe and the brewing chamber 110 can come from, for example, a pump. In actual application, for example, the liquid outlet pipe can be connected to the brewing chamber 110 by penetrating the second piston 220; for example, the waste liquid outlet pipe 310 and the water injection pipe 320 can be connected to a main pipe by the three-way valve 330, and the main pipe is connected to the brewing chamber 110 by penetrating the first piston 210. The three-way valve 330 can be selectively opened or closed to achieve communication or interruption between the waste liquid outlet pipe 310, the water injection pipe 320 and the brewing chamber 110.

[0120] In other embodiments, a normally closed structure can not be provided, and a separate switch valve 350 can be used to interrupt the pipes entering the brewing chamber 110.

[0121] As described above, during long-term use, part of the liquid passing pipe, for example, the pipe between the valve and the brewing chamber 110, can easily retain brewing residual liquid. Therefore, in the present application, the liquid passing pipe is defined as a first pipe and a second pipe. For example, when the first pipe is the waste liquid outlet pipe 310, the second pipe is the liquid outlet pipe and the water injection pipe 320. When the first pipe is the liquid outlet pipe, the second pipe is the waste liquid outlet pipe 310 and the water injection pipe 320. Of course, the first pipe can be one or at least two.

[0122] It should be noted that the brewing device in the present design can be a device used only for brewing and extracting powder. Alternatively, according to actual needs, the brewing device can also be selectively integrated with, for example, one or more of a grinding module, a milk supply module, etc. to form a full-automatic beverage preparation device.

[0123] In addition, in an embodiment, the brewing device can further comprise an input module. The input module can be, but is not limited to, a touch panel or the like. The input interface of the input module is pre-provided with at least one preset parameter, and when a user operates based on the input module, the input value of each preset parameter can be input. The preset parameter can be, but is not limited to, the specification parameter of the at least one liquid passing pipe and / or the movement parameter of the two piston members. The specification parameter of the liquid passing pipe can be, but is not limited to, the pipe diameter, volume, length, material and the like of the liquid passing pipe; and the movement parameter of the two piston members can be, but is not limited to, the distance between the two piston members, the moving direction, moving speed and moving distance of any piston member, and the like.

[0124] Referring to Figure 12 , Figure 12 The control device 400 is a control device related to the hardware running environment of the embodiment of the present application.

[0125] As shown in Figure 12 , the control device 400 can include a processor 410, such as a central processing unit 410 (CPU), a communication bus 420, a user interface 430, a network interface 440, and a memory 450. The communication bus 420 is used to realize the connection and communication between the components. The user interface 430 can include a display screen, an input unit such as a keyboard, and the optional user interface 430 can further include a standard wired interface, a wireless interface. The network interface 440 can optionally include a standard wired interface, a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 450 can be a high-speed random access memory 450 (RAM) memory 450, or a stable non-volatile memory 450 (NVM), such as a disk memory 450. The memory 450 can also be an independent storage device from the aforementioned processor 410.

[0126] Those skilled in the art can understand that Figure 12 the structure shown in the above description does not constitute a limitation on the control device 400, and can include more or fewer components than the illustrated components, or combine certain components, or different component arrangements.

[0127] As shown in Figure 12 , the memory 450 as a storage medium can include an operating system, a network communication module, a user interface 430 module, and a brewing residue cleaning program.

[0128] InFigure 12 In the control device 400 shown, the network interface 440 is mainly used for data communication with a network server; the user interface 430 is mainly used for data interaction with a user; the processor 410 and the memory 450 in the control device 400 of the application can be arranged in the brewing device, and the control device 400 calls the cleaning program of the brewing residual liquid stored in the memory 450 through the processor 410, and executes the cleaning method of the brewing residual liquid provided in the embodiments of the application.

[0129] The embodiments of the application provide a cleaning method of a brewing residual liquid, referring to Figure 13 , Figure 13 FIG. 1 is a flowchart of a first embodiment of the cleaning method of the brewing residual liquid.

[0130] In the embodiment, the cleaning method of the brewing residual liquid comprises the following steps:

[0131] Step A2: controlling the two piston members to move into the brewing cavity 110;

[0132] In the embodiment, before the brewing residual liquid in the brewing cavity 110 and / or the liquid passage is cleaned, it is necessary to first ensure that the two piston members are located in the brewing cavity 110. It should be noted that controlling the two piston members to move into the brewing cavity 110 includes but is not limited to that at least one piston member is located inside the brewing cavity 110. It can be that both of the two piston members are completely moved into the brewing cavity 110; or it can be that one of the two piston members is moved into the brewing cavity 110, and the other piston member is moved to be flush with the corresponding upper opening or lower opening.

[0133] The execution timing of the cleaning operation of the brewing residue is not limited in the present design. The cleaning operation of the brewing residue can be executed after one or at least two times of the residue discharging operation or after the completion of the cleaning of the entire brewing pipeline according to actual needs. The residue discharging operation can be executed after one or at least two times of the beverage preparation operation. Preferably, at least one residue discharging operation is performed from the brewing cylinder 100 after each beverage preparation, and then at least one cleaning operation of the brewing residue can be performed. The beverage preparation operation is the operation process of brewing and extracting the beverage from the powder. Specifically, the beverage preparation operation includes: controlling the first piston member 210 to be arranged in the brewing chamber 110, covering the lower end opening of the brewing chamber 110, and reserving sufficient powder receiving space in the brewing chamber 110. The second piston member 220 is discharged from the brewing chamber 110 to the outside, so that the upper end opening of the brewing chamber 110 is opened to allow the powder to enter the brewing chamber 110. Then the second piston member 220 is moved from the upper end opening to the brewing chamber 110. The first piston member 210 and / or the second piston member 220 move towards each other to press the powder into a powder cake. Finally, the water injection pipeline 320 is communicated with the brewing chamber 110, and high-temperature hot water is introduced into the brewing chamber 110 to brew and extract the beverage from the powder cake.

[0134] It can be understood that the residue to be discharged in the residue discharging operation can generally be the residue cake remaining after brewing and extraction, or can also be the residue remaining in the brewing chamber 110 after brewing. The residue discharging operation can be, but is not limited to:

[0135] In an embodiment, at least one of the two piston members can be separated from the brewing chamber 110 to the outside to form an opening at the brewing cylinder 100. Based on this, step A2 can further include:

[0136] Step A11: controlling at least one piston member to separate from the brewing chamber 110 to the outside;

[0137] Step A12: controlling the other piston member to move towards the opening to discharge the residue in the brewing chamber 110 to the outside through the opening.

[0138] Please refer to Figures 4 to 7 , specifically in an embodiment, when the two piston members are the first piston member 210 and the second piston member 220 as described above, the residue discharging operation can be selected to be performed, that is:

[0139] controlling the second piston member 220 to be discharged from the brewing chamber 110 to the outside of the brewing chamber 110; and

[0140] controlling the first piston member 210 to move at least upwards to be flush with the upper end opening of the brewing chamber 110 to discharge the residue in the brewing chamber 110 upwards.

[0141] It can be understood that the first moving stroke of the first piston member 210 in the brewing cylinder is greater than the moving stroke of the second piston member 220. After the beverage preparation operation described above, the second piston member 220 is first translated upward to the upper end opening of the brewing chamber 110 to discharge outward, so that the upper end opening of the brewing chamber 110 is opened. Then the first piston member 210 is controlled to be translated upward in the brewing chamber 110. Since the outer peripheral side wall of the first piston member 210 and the inner cavity wall of the brewing chamber 110 are in sealing abutment, during the translation, the residue on the upper end of the first piston member 210 and the residue remaining at the inner cavity wall of the brewing chamber 110 can be moved upward by the first piston member 210. The first piston member 210 is at least translated upward to be flush with the upper end opening of the brewing chamber 110, or can be further translated upward to protrude upward from the upper end opening of the brewing chamber 110, so that the residue on the first piston member 210 can be scraped off by a scraper, which can be selected by rotating the brewing cylinder 100 or other ways, including but not limited to mechanical active pushing, to push the residue transversely out; or the residue on the first piston member 210 can be cleaned by water.

[0142] The distance H1 by which the second piston member 220 moves upward away from the upper end 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 member 220.

[0143] Please refer to Figures 8 to 11 In another embodiment, when the two piston members are the first piston member 210 and the second piston member 220 as described above, the following residue discharging operation can be optionally performed, that is:

[0144] The first piston member 210 is controlled to be discharged downward from the brewing chamber 110 to the outside of the brewing chamber 110;

[0145] The second piston member 220 is controlled to be at least translated downward to be flush with the lower end opening of the brewing chamber 110, so as to discharge the residue in the brewing chamber 110 downward.

[0146] It can be understood that the first moving stroke of the first piston member 210 in the brewing cylinder is less than the moving stroke of the second piston member 220. After the beverage preparation operation described above, the first piston member 210 is first translated downward to the lower end opening of the brewing chamber 110 to discharge outward, so that the lower end opening of the brewing chamber 110 is opened. In this process, the part of the dregs held by the upper end of the first piston member 210 is taken away from the brewing chamber 110 by the first piston member 210, and then the dregs on the first piston member 210 can be scraped by a subsequent scraper, for example, or cleaned by a subsequent cleaning water. Then, the second piston member 220 is controlled to translate downward in the brewing chamber 110. Since the outer peripheral side wall of the second piston member 220 and the inner cavity wall of the brewing chamber 110 remain in sealing abutment, during the translation, the dregs cake remaining at the inner side cavity wall of the brewing chamber 110 can be taken down by the second piston member 220 and finally discharged outward through the lower end opening of the brewing chamber 110. The second piston member 220 is at least translated downward to be flush with the lower end opening of the brewing chamber 110, or can be further translated downward to protrude downward from the lower end opening of the brewing chamber 110, to ensure that the dregs remaining on the inner side cavity wall of the brewing chamber 110 can be completely scraped.

[0147] In the preferred embodiments, the distance H2 by which the first piston member 210 moves downward away from the lower end opening of the brewing chamber 110 is less than the thickness H0 of the dregs cake, so as to avoid the dregs cake adhering to the upper surface of the first piston member 210 due to gravity and moving with the first piston member 210 and not being removed. In the above embodiments, the upper dregs discharge operation can control the first piston member 210 to be translated upward to completely protrude from the upper end opening or to be translated upward to be flush with the upper end opening, and the lower dregs discharge operation can control the second piston member 220 to be translated downward to completely protrude from the lower end opening or to be translated downward to be flush with the lower end opening, which can be specifically set according to actual needs. When the first piston member 210 is translated to be flush with the upper end opening and the second piston member 220 is translated to be flush with the lower end opening, it is helpful to reduce the active stroke amount of the first piston member 210 / second piston member 220 as much as possible on the basis of achieving the purpose of discharging dregs.

[0148] It should be noted that in the above two preferred embodiments, whether it is the upper dregs discharge operation or the lower dregs discharge operation, relative displacement needs to be generated between at least one piston member and the brewing cylinder 100. The relative displacement can be that the brewing cylinder 100 is fixed and the first piston member 210 and / or the second piston member 220 is directly driven by the driving mechanism to translate and move, or the first piston member 210 and / or the second piston member 220 is fixed and the brewing cylinder 100 is rotated, translated or moved in other ways to move. In other embodiments, for example, the upper dregs discharge operation can also control the piston member and the brewing cylinder 100 not to generate relative displacement, and a mechanical arm can be used to scrape the dregs cake.

[0149] Of course, the cleaning operation of the brewing residual liquid can also be automatically executed by the program control in association with other working modes. For example, it can be set that when the machine is started or restarted after an interval of a preset time length, the cleaning operation of the brewing residual liquid can be executed once or several times. Or it can be set that when the machine works for a preset time length, the cleaning operation of the brewing residual liquid can be executed once or several times, and the like.

[0150] The cleaning operation of the brewing residual liquid can also be directly triggered and executed based on the manual operation of the user. For example, a trigger part can be preset on the control panel of the machine, and when the user triggers the trigger part, the machine automatically executes the cleaning operation of the brewing residual liquid.

[0151] Before step A2 is executed, if the first piston member 210 and / or the second piston member 220 is outside the brewing chamber 110, the first piston member 210 and / or the second piston member 220 needs to be operated to move into the brewing chamber 110. If the first piston member 210 and / or the second piston member 220 is already in the brewing chamber 110, it is considered that the step has been completed.

[0152] In addition, in step A2, the first piston member 210 and the second piston member 220 are both moved into the brewing chamber 110, but the interval distance between them is not limited and can be specifically set according to subsequent operations (for example, step A3). The first piston member 210 and the second piston member 220 can be completely abutted or can be spaced apart by a preset distance to define a first chamber between the first piston member 210 and the second piston member 220.

[0153] Step A3: controlling at least one piston member to move close to or away from the other piston member to drive the brewing residual liquid to be discharged from the liquid passage.

[0154] In the embodiment, the upper end opening of the brewing chamber 110 is closed by the second piston member 220, and the lower end 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 in communication with 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 close to or away from the other piston member, the pressure difference between the first chamber and the liquid passage can be changed, so as to drive the brewing residual liquid in the brewing chamber 110 and / or the liquid passage to move to a target area.

[0155] It is emphasized that in a brewing module or a brewing device, the liquid passage can be only one or several according to actual needs. Each liquid passage can be connected by a valve body alone or at least two liquid passages in common to realize the control of the conduction and the cutoff between the liquid passage and the first chamber. At this time, one of each liquid passage is the first passage and the rest is the second passage, and step A3 can specifically include:

[0156] Step A34: control the first passage to be in conduction with the brewing chamber 110 and each second passage to be cut off from the brewing chamber 110.

[0157] It can be understood that the upper end of the brewing chamber 110 is closed by the second piston 220, and the lower end 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 passage is in conduction with the brewing chamber 110, and the rest of the second passage is cut off from the brewing chamber 110. Among them, the first passage that is in conduction with the brewing chamber 110 at the same time can be one or at least two. The other end of the first passage that is not in conduction with the brewing chamber 110 remains open.

[0158] Step A35: control at least one piston to translate towards or away from the other piston to drive the brewing residual liquid to be discharged from the first passage.

[0159] It can be understood that by operating at least one piston to translate towards or away from the other piston, the pressure difference inside and outside the first passage can be changed, thereby driving the brewing residual liquid in the brewing chamber 110 and / or the first passage to move to the target area. Among them, the first passage can be specifically the waste discharge passage 310.

[0160] In order to realize that the brewing residual liquid in the liquid passage is completely transferred to the target area, in a specific application, the volume change amount generated by the piston translation activity is not less than the volume of the liquid passage. Taking the first passage as an example, the volume change amount generated by the piston translation activity is not less than the volume of the first passage. Specifically, the product of the translation distance of the piston and the maximum end area of the piston head itself is R1, and the total volume of the pipe section connected by the first passage and the brewing chamber 110 is R2, then R1 is not less than R2. Since R2 and the maximum end area of the piston head in R1 are fixed, the translation distance of the piston can be specifically adjusted.

[0161] The determination method of the volume of the first passage, the volume change amount generated by the piston translation activity and the like can directly call the system default value, or can be obtained by the user actively input. Based on this, in an embodiment, the brewing module and / or the brewing device further includes an input module as described above. The input module displays one or at least two preset parameters for the user to operate. Therefore, the cleaning method of the brewing residual liquid specifically includes:

[0162] Step C2: controlling the two piston members to move into the brewing chamber;

[0163] Step C3: obtaining the input value input by the input module, and controlling at least one of the piston members to move towards or away from the other piston member according to the input value, so as to drive the brewing residual liquid in the liquid passage to be discharged from the liquid passage.

[0164] It can be understood that the preset parameters include the specification parameters of the liquid passage and / or the movement parameters of the two piston members. The specification parameters of the liquid passage can assist in determining, for example, the volume of the first passage, and can be but are not limited to the pipe diameter, pipe length, material, etc. of the liquid passage; the movement parameters of the two piston members are used to assist in determining, for example, the volume change amount generated by the translation movement of the piston members, and can be but are not limited to the translation distance of at least one piston member. The maximum end area of the piston member mentioned above can be obtained by calling the system default parameters.

[0165] In the above steps, only the first piston member 210 can be translated, only the second piston member 220 can be translated, or both the first piston member 210 and the second piston member 220 can be translated.

[0166] Specifically, in an embodiment, step A3 includes:

[0167] Step A31: controlling at least one piston member to move towards the other piston member, so as to drive the brewing residual liquid to be pushed out from the liquid passage.

[0168] Taking the liquid passage as the first passage for example, that is, in this step, the target region is a component such as a slag collecting box, a water collecting tank, etc. in communication with the other end port of the first passage. By moving the first piston member 210 upward and / or moving the second piston member 220 downward, the brewing residual liquid in the first chamber between the two piston members can be pushed towards the first passage, and the brewing residual liquid at the first passage can be pushed out together towards the slag collecting box, the water collecting tank, etc., so as to achieve the purpose of discharging the brewing residual liquid in the brewing chamber 110 and / or the first passage. If the brewing residual liquid is discharged by this step, in step A2, a sufficient translation distance between the first piston member 210 and the second piston member 220 needs to be reserved, so that the brewing residual liquid in the brewing chamber 110 and / or the first passage can be completely pushed out.

[0169] Alternatively, in another embodiment, step A3 can also include:

[0170] Step A32: controlling at least one piston member to move away from the other piston member, so as to drive the brewing residual liquid to be sucked from the liquid passage into the brewing chamber 110;

[0171] Step A33: discharging the brewing residual liquid in the brewing chamber 110 outward.

[0172] Take the first pipe as an example, that is, in the embodiment, the target area is the brewing cavity 110 first. Then, by discharging the brewing residual liquid in the brewing cavity 110, the purpose of discharging the brewing residual liquid from the machine is achieved.

[0173] When at least one of the two piston members can be separated from the brewing cavity 110 to form an opening at the brewing cylinder 100, the step A33 can specifically include:

[0174] Step A331: Control at least one of the piston members to separate from the brewing cavity 110 outwardly;

[0175] Step A332: Control the other piston member to move towards the opening to discharge the brewing residual liquid in the brewing cavity 110 outwardly through the opening.

[0176] Specifically, when the first piston member 210 can be separated from the brewing cavity 110 outwardly, the step A331 can specifically be:

[0177] Step A333: Control the first piston member 210 to move downwardly in the brewing cavity 110 to separate from the brewing cavity 110 outwardly.

[0178] At this time, since the lower end opening of the brewing cylinder 100 is opened, and the brewing residual liquid generally does not adhere to the inner cavity wall of the brewing cavity 110 too much, but will be discharged outwardly through the lower end opening under the action of gravity.

[0179] Or when the second piston member 220 can be separated from the brewing cavity 110 outwardly, the step A331 can specifically include:

[0180] Step A334: Control the second piston member 220 to move upwardly in the brewing cavity 110 to separate from the brewing cavity 110 outwardly;

[0181] Step A335: Control the first piston member 210 to move towards the upper end opening to discharge the brewing residual liquid in the brewing cavity 110 outwardly through the upper end opening.

[0182] Specifically, first, operate the second piston member 220 to move upwardly in the brewing cavity 110 and move to separate from the brewing cavity 110 outwardly, so that the upper end opening of the brewing cavity 110 is opened. Then, control the first piston member 210 to translate upwardly. In the upward movement of the first piston member 210, the brewing residual liquid collected in the brewing cavity 110 can be simultaneously moved upwardly. The first piston member 210 is at least translated upwardly to be flush with the upper end opening of the brewing cavity 110, or can be further translated upwardly to protrude upwardly from the upper end opening of the brewing cavity 110 to completely push out the brewing residual liquid.

[0183] It should be noted that when the same brewing module / brewing device can respectively and independently perform the residue discharging operation and the cleaning operation of the brewing residual liquid according to the preset program, the optional residue discharging direction and the discharge direction of the brewing residual liquid are consistent as much as possible, and the moving direction of each piston piece is as much as possible. For example, when the first piston piece 210 in the brewing device is provided with a first moving stroke greater than the second moving stroke of the second piston piece 220, the step A3 in the above-mentioned cleaning operation of the brewing residual liquid can be specifically provided that the second piston piece 220 is fixed, and the first piston piece 210 is translated to approach or translate away from the second piston piece 220. The residue discharging mode can be specifically up residue discharging. And step A3 can specifically include steps A334 to A335.

[0184] Conversely, when the first piston piece 210 in the brewing device is provided with a first moving stroke smaller than the second moving stroke of the second piston piece 220, the step S400 in the above-mentioned cleaning operation of the brewing residual liquid can be specifically provided that the first piston piece 210 is fixed, and the second piston piece 220 is translated to approach or translate away from the first piston piece 210. The residue discharging mode can be specifically down residue discharging. And step A3 can specifically include step A333.

[0185] In view of the above, after the cleaning operation of the brewing residual liquid is performed once or several times on the brewing cavity 110 and / or the liquid passage (for example, step A35 can be performed), the following steps can also be selectively performed:

[0186] Step A37: Control the water injection pipeline 320 to be communicated with the brewing cavity 110, and inject clean water into the brewing cavity 110;

[0187] Step A38: Discharge the brewing residual liquid in the brewing cavity 110 outward.

[0188] In the embodiment, by controlling the water injection pipeline 320 to be communicated with the brewing cavity 110, external clean water, high-temperature steam, etc. can be injected into the brewing cavity 110, so as to realize the flushing of the brewing cavity 110. In this process, taking the liquid passage including the first pipeline as an example, the first pipeline can be kept in communication with the brewing cavity 110, that is, the first pipeline can be flushed at the same time; of course, the first pipeline can also be kept separate from the brewing cavity 110, that is, only the brewing cavity 110 is flushed.

[0189] In the process of injecting external clean water or high-temperature steam into the brewing chamber 110, the first piston member 210 and / or the second piston member 220 can be moved out of the brewing chamber 110, so that the upper end opening and / or the lower end opening of the brewing chamber 110 are opened. At this time, by injecting an amount of water into the brewing chamber 110, which is not less than the volume of the current empty space of the brewing chamber 110, the entire empty space of the brewing chamber 110 can be flushed. And during the flushing process, waste water is continuously discharged. Wherein, if the first piston member 210 is moved into the brewing chamber 110 and the second piston member 220 is moved out of the brewing chamber 110, the volume of the current empty space of the brewing chamber 110 is the volume of the chamber between the upper end surface of the first piston member 210 and the upper end opening of the brewing chamber 110. If the second piston member 220 is moved into the brewing chamber 110 and the first piston member 210 is moved out of the brewing chamber 110, the volume of the current empty space of the brewing chamber 110 is the volume of the chamber between the lower end surface of the second piston member 220 and the lower end opening of the brewing chamber 110. If the first piston member 210 and the second piston member 220 are both moved out of the brewing chamber 110, the volume of the current empty space of the brewing chamber 110 is the total volume of the brewing chamber 110.

[0190] Alternatively, before step A37, the method further comprises:

[0191] Step A36: controlling the two piston members to be moved into the brewing chamber 110 and be spaced apart by a preset distance.

[0192] That is, in the process of injecting external clean water or high-temperature steam into the brewing chamber 110, the first piston member 210 and the second piston member 220 are both moved into the brewing chamber 110, so that the upper end opening and the lower end opening of the brewing chamber 110 are both kept closed. At this time, by injecting an amount of water into the brewing chamber 110, which is not less than the volume of the current empty space of the brewing chamber 110, the entire empty space of the brewing chamber 110 can be flushed. And during the flushing process, the upper end surface of the first piston member 210 and the lower end surface of the second piston member 220 can also be flushed at the same time. Wherein, the volume of the current empty space of the brewing chamber 110 is the volume of the chamber between the upper end surface of the first piston member 210 and the lower end surface of the second piston member 220.

[0193] Then, step A38 can be specifically referred to step A33 described above. That is, it can be specifically step A333; or it can be steps A334 to A335.

[0194] In the technical solution provided by the present application, the outer circumferential side wall of the piston member and the side cavity wall of the brewing cavity 110 are sealed and abutted, which makes the brewing cavity 110 located between the two piston members and the liquid passage communicating with the brewing cavity 110 be defined when the two piston members are both moved to be located in the brewing cavity 110. Then, by operating at least one piston member to move close to or away from the other piston member, the brewing residual liquid remaining in the brewing cavity 110 and / or the liquid passage can be concentrated and pumped into the brewing cavity 110 or pushed to the outlet end of the liquid passage, which helps to recover and process the brewing residual liquid in time, effectively prevents the brewing residual liquid from deteriorating, polluting and blocking the pipeline for a long time, and has the characteristics of simple operation.

[0195] Based on the above one or more embodiments, it can be understood that the more preferred scheme of the present application is to use the suction method to suck the brewing residual liquid into the brewing cylinder 100. Therefore, in a specific application, the brewing residual liquid cleaning method comprises:

[0196] Step B2: The two piston members are arranged in the brewing cylinder 100 and moved away in opposite directions to form a closed enlarged space in the brewing cylinder 100, and the enlarged space sucks the brewing residual liquid in the liquid passage into the brewing cylinder 100.

[0197] Step B3: Control at least one piston member to move out of the brewing cylinder 100, so that the brewing residual liquid in the brewing cavity 110 is discharged outward through the opening.

[0198] In the present embodiment, the brewing residual liquid is sucked into the brewing cylinder 100 by the suction method, which can provide a simple and efficient method for cleaning the residual brewing residual liquid in the liquid passage, so as to minimize the influence on the efficiency of the continuous brewing operation (such as beverage preparation operation). Especially in the actual use process, in the gap between the preset brewing operations, the brewing residual liquid in the liquid passage between the brewing cylinder 100 and the beverage outlet is emptied by using the above brewing residual liquid cleaning method, so as to ensure the quality of each cup of beverage prepared in the subsequent brewing operation.

[0199] Specifically, the brewing cylinder 100 is generally cylindrical and has a brewing central axis X0. The brewing central axis X0 can be vertically arranged along the gravity direction (i.e. the up-down direction in the above description), horizontally arranged in the transverse direction perpendicular to the gravity direction, or arranged at an arbitrary angle between the gravity direction and the transverse direction, which can all achieve the technical effects of the present application.

[0200] The first piston member 210 has a first central axis X1, and the second piston member 220 has a second central axis X2. When the first piston member 210 and the second piston member 220 are both arranged in the brewing cylinder 100, the first central axis X1 and the second central axis X2 are collinearly overlapped with the brewing central axis X0. At least one of the first piston member 210 or the second piston member 220 can be moved outwards from the brewing cylinder 100 so that the brewing cylinder 100 forms an exposed opening (e.g. a lower end opening or an upper end opening) to discharge the brewing residual liquid outwards from the opening.

[0201] In particular, when the first piston member 210 is moved downwards in the brewing cavity 110 to move outwards from the brewing cavity 110, the second central axis X2 is collinearly overlapped with the brewing central axis X0, and the first central axis X1 is deviated from the brewing central axis X0 to make room for the second piston member 220 to move in the brewing cavity 110 towards the first piston member 210 to discharge the residual liquid in the brewing cavity 110.

[0202] It should be noted that the movement of the first piston member 210 and the second piston member 220 is not necessarily synchronized. For example, the step of deviating the first central axis X1 from the brewing central axis X0 is completed at least before the step of moving the second piston member 220 in the brewing cavity 110 towards the first piston member 210, so as to ensure that the first piston member 210 does not interfere with the entire process of discharging the brewing residual liquid.

[0203] Of course, the deviation of the first central axis X1 from the brewing central axis X0 is achieved by the relative displacement between the first piston member 210 and the brewing cylinder 100. At this time, the first piston member 210 and the brewing cylinder 100 can be directly moved in the first direction described above so that the first central axis X1 is collinear with the brewing central axis X0, but the first piston member 210 and the lower end opening of the brewing cylinder 100 are spaced apart in the first direction. Alternatively, the first piston member 210 and the brewing cylinder 100 can be moved in a transverse direction perpendicular to the first direction described above so that the first central axis X1 is deviated from the brewing central axis X0 in the transverse direction, and the first central axis X1 is substantially parallel to the brewing central axis X0. Alternatively, the first piston member 210 and the brewing cylinder 100 can be moved in any direction inclined with respect to the first direction and / or the transverse direction described above so that the first central axis X1 is deviated from the brewing central axis X0 in the inclined direction, and the first central axis X1 intersects the brewing central axis X0 to form an included angle greater than 0° and less than 180°.

[0204] Then, when the second piston 220 moves upward in the brewing chamber 110 to disengage from outside 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 to make room for the first piston 210 to move in the brewing chamber 110 towards the second piston 220, thereby driving the residual liquid in the brewing chamber 110 to be discharged.

[0205] Similarly, during the movement of the first piston 210 and the second piston 220, the first piston 210 and the second piston 220 do not necessarily move synchronously. For example, the second central axis X2 and the brewing central axis X0 can be collinear or deviate from each other at least before the first piston 210 moves in the brewing chamber 110 towards the second piston 220, thereby ensuring that the second piston 220 does not interfere during the entire process of discharging the brewing residual liquid.

[0206] 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. At this time, the second piston 220 and the brewing cylinder 100 can be directly moved in the first direction so that the second central axis X2 is collinear with the brewing central axis X0, but the second piston 220 and the upper opening of the brewing cylinder 100 are spaced apart in the first direction. Or the second piston 220 and the brewing cylinder 100 can be moved transversely perpendicular to the first direction, so that the second central axis X2 deviates from the brewing central axis X0 in the transverse direction, and the second central axis X2 is approximately parallel to the brewing central axis X0. Or the second piston 220 and the brewing cylinder 100 can be moved in any direction inclined to the first direction and / or transversely, so that the second central axis X2 deviates from the brewing central axis X0 in the inclined direction, and the second central axis X2 intersects the brewing central axis X0 to form an included angle greater than 0° and less than 180°.

[0207] Based on one or more of the above embodiments, in an actual application scenario, the brewing residual liquid cleaning method comprises:

[0208] Step S1: After confirming that the brewing is completed, control at least one piston to move outward from the brewing cylinder 100 in the first direction;

[0209] Step S2: Control another piston to move in the first direction, and push the residue in the brewing cylinder 100 out of the brewing cylinder 100;

[0210] Step S3: Control the piston in the brewing cylinder 100 to reciprocate in the direction close to and away from the opening;

[0211] Step S4: control the piston member to move reciprocally in the direction of approaching and moving away from the opening;

[0212] Step S5: control the two piston members to move away in the opposite direction after moving into the brewing cylinder 100.

[0213] The steps S1 and S2 are executed at least once.

[0214] In one embodiment of the present application, the first piston member 210 and the second piston member 220 are movably arranged in the brewing cylinder 100 along the brewing central axis X0. The second piston member 220 is above the first piston member 210 in the first direction. The second piston member 220 can move upwardly out of the brewing cylinder 100 to provide an upper end opening of the brewing cylinder 100 for the first piston member 210 to push the residual liquid in the brewing cylinder 100 upwardly. After the beverage brewing is completed, the second piston member 220 moves upwardly along the brewing central axis X0 to open the upper end opening of the brewing cylinder 100, and the first piston member 210 moves toward the second piston member 220 (upwardly) to at least reach the edge of the brewing cylinder 100 and push the waste residue in the brewing cylinder 100 outwardly, and then the brewing cylinder 100 is rotated to scrape the waste residue by the external baffle or in an active manner. After the waste residue is scraped, the brewing cylinder 100 returns to the original position, and the second piston member 220 moves in the opposite direction into the brewing cylinder 100 by a distance K1. The distance K1 needs to meet the condition that the second piston member 220 moves into the brewing cylinder 100 again and forms a sealing state to the inner diameter of the brewing cylinder 100. Then the first piston member 210 and the second piston member 220 move away from each other in the brewing cylinder 100 by a distance K2. Specifically, one of the first piston member 210 and the second piston member 220 can remain fixed, and the other moves away from the fixed piston member, or both the first piston member 210 and the second piston member 220 move away from each other. Preferably, the second piston member 220 covers the upper end opening of the brewing cylinder 100 and is fixed, and the first piston member 210 moves downwardly to form the distance K2 and move away from the second piston member 220.

[0215] In another specific embodiment of the present application, the first piston member 210 and the second piston member 220 are movably arranged in the brewing cylinder 100 along the brewing central axis X0. The second piston member 220 is above the first piston member 210 in the first direction. The first piston member 210 can be moved downward to disengage from the brewing cylinder 100 to provide an open lower end of the brewing cylinder 100 for the second piston member 220 to push the residual liquid in the brewing cylinder 100 downward. After the beverage brewing is completed, the first piston member 210 is moved downward along the brewing central axis X0 to open the lower end of the brewing cylinder 100, and the second piston member 220 is moved toward the first piston member 210 (downward) to at least the edge of the brewing cylinder 100 to push the waste residue in the brewing cylinder 100 outward, and then the brewing cylinder 100 is rotated to rely on the external baffle or an active way to scrape the waste residue. After the waste residue is scraped, the brewing cylinder 100 returns to the original position, and the first piston member 210 is moved in the opposite direction into the brewing cylinder 100 by a distance K1. The distance K1 needs to meet the condition that the first piston member 210 is repositioned in the brewing cylinder 100 and forms a sealing state with the inner diameter of the brewing cylinder 100. Then the first piston member 210 and the second piston member 220 are coaxially and oppositely moved away from each other by a distance K2 in the brewing cylinder 100. Specifically, one of the first piston member 210 or the second piston member 220 remains fixed, and the other moves away from the fixed piston member, or both the first piston member 210 and the second piston member 220 move away from each other. Preferably, the first piston member 210 covers the open lower end of the brewing cylinder 100 and is fixed, and the second piston member 220 moves upward to form a stroke distance K2 and move away from the first piston member 210.

[0216] In the above embodiment, the liquid passage includes a first pipe and a second pipe, wherein the first pipe is a liquid outlet pipe connected between the beverage outlet and the second piston member, the length of the liquid outlet pipe is L, the inner diameter is r, the inside of the brewing cylinder 100 is preferably a regular cylindrical shape, and the inner diameter is R, wherein πr 2 L≤πR 2 K2. Thus, the minimum value of the K2 distance of the first piston member 210 and the second piston member 220 can be calculated to avoid excessive stroke and reduce efficiency.

[0217] Preferably, when the first piston member 210 and the second piston member 220 move by the stroke K2, the first pipe is an open passage, and the second pipe is closed, so that the residual liquid in the first pipe is drawn into the brewing cylinder 100. After the second piston member 220 moves upward to disengage from the brewing cylinder 100, the first piston member 210 moves upward to a position not lower than the upper surface of the brewing cylinder 100 to push the waste liquid drawn into the brewing cylinder 100 outward. Subsequently, the brewing cylinder 100 and the first piston member 210 can be moved together to rely on the baffle or an active way to clean the waste residue to completely remove the residual liquid.

[0218] In view of the above, in actual application:

[0219] When the liquid outlet pipeline includes a waste liquid pipeline connected with the first piston member 210 and a liquid outlet pipeline connected with the second piston member 220, as described above, the liquid outlet pipeline communicates the brewing chamber 110 and the beverage outlet of the whole machine. Among them, the first piston member 210 and the second piston member 220 are located in the brewing chamber 110 and form a sealed space with the brewing cylinder 100, and the residual liquid in the liquid outlet pipeline can be drawn back into the brewing chamber 110 from the liquid outlet pipeline when the first piston member 210 and the second piston member 220 move away from each other and form a negative pressure in the brewing chamber 110.

[0220] Specifically, the second piston member 220 is located above the first piston member 210 in the vertical direction in the brewing cylinder 100, and the residual liquid drawn into the brewing chamber 110 accumulates above the first piston member 210. At this time, the residual liquid accumulated in the brewing chamber 110 at the first piston member 210 can be discharged at least in one of the following ways:

[0221] The first piston member 210 is separated downward from the brewing cylinder 100 to form an opening at the lower end of the brewing cylinder 100, and the residual liquid is discharged from the opening at the lower end of the brewing cylinder 100; or,

[0222] The second piston member 220 is separated upward from the brewing cylinder 100 to form an opening at the upper end of the brewing cylinder 100, and the first piston member 210 pushes the residual liquid outward from the opening at the upper end of the brewing cylinder 100; or,

[0223] The first piston member 210 is in communication with the waste liquid pipeline 310, and the brewing residual liquid is discharged from the first piston member 210 and the waste liquid pipeline 310.

[0224] In addition, the brewing residual liquid discharged from the waste liquid pipeline 310 can be selected in one of the following ways:

[0225] The first piston member 210 and the second piston member 220 move close to each other, and a closable valve body is arranged on the liquid outlet pipeline connected to the second piston member 220; or,

[0226] A pump body is arranged on the waste liquid pipeline 310 from the first piston member 210, wherein the channels of the waste liquid pipeline 310 to the liquid outlet pipeline are all communicated.

[0227] The first piston member 210 and the waste liquid pipeline 310 are provided with a valve body for connecting the brewing hot water boiler, and the valve body can be selectively connected in pairs or all disconnected.

[0228] The first piston member 210 and the second piston member 220 hold the powder cake in the brewing chamber 110 of the brewing cylinder 100 for extraction, and the direction of the residual liquid discharged from the brewing chamber 110 after the powder cake is extracted is consistent with the direction of the brewing residual liquid.

[0229] It should be noted that the above-described workflow is merely illustrative and does not limit the scope of protection of the present application. In actual applications, a person skilled in the art can select part or all of the workflow according to actual needs to achieve the purpose of the embodiment scheme, which is not limited herein.

[0230] From the above description of the embodiments, a person skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and a general hardware platform as required, and of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory 450 (Read Only Memory, ROM) / RAM, a magnetic disk, an optical disk), and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present application.

[0231] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A method for cleaning residual brewing liquid, applied to brewing equipment, characterized in that, The brewing device includes a brewing cylinder having a brewing chamber, two pistons that are movable relative to each other and disposed within the brewing chamber, and a liquid passage that is connectable to and disconnectable from the brewing chamber. At least one of the two pistons can be disengaged from the brewing chamber to form an opening at the brewing cylinder. The method for cleaning up residual brewing liquid includes: Control the movement of the two piston components into the brewing chamber; Controlling at least one of the piston members away from the other piston member to draw residual brewing liquid from the liquid passage into the brewing chamber; and, Discharge the residual brewing liquid from the brewing chamber. The step of discharging the residual brewing liquid from the brewing chamber includes: Control at least one of the piston components to disengage from the brewing chamber outwards.

2. The method for cleaning residual brewing liquid as described in claim 1, characterized in that, In the step of controlling at least one of the pistons to move away from the other piston to drive the brewing residual liquid from the liquid passage into the brewing chamber, the volume change caused by the movement of the piston is not less than the volume of the liquid passage.

3. The method for cleaning residual brewing liquid as described in any one of claims 1 to 2, characterized in that, 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 pistons to move away from the other piston to draw the brewing residual liquid from the liquid passage into the brewing chamber 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 away from the other piston component to drive the brewing residue from the first pipeline into the brewing chamber.

4. The method for cleaning residual brewing liquid as described in claim 3, characterized in that, The first pipeline is a waste discharge pipeline.

5. The method for cleaning residual brewing liquid as described in claim 3, characterized in that, One of the second pipelines is a water injection pipeline; After the step of draining the residual brewing liquid from the brewing chamber, 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.

6. The method for cleaning residual brewing liquid as described in claim 5, characterized in that, 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.

7. The method for cleaning residual brewing liquid as described in claim 5, characterized in that, The amount of clean water injected is not less than the volume of the currently empty space in the brewing chamber.

8. The method for cleaning residual brewing liquid as described in any one of claims 5 to 7, characterized in that, After the step of controlling at least one of the piston components to disengage outward from the brewing chamber, the method further includes: Control the other piston to move toward the opening.

9. The method for cleaning residual brewing liquid as described in any one of claims 5 to 7, characterized in that, The brewing chamber extends vertically through the brewing cylinder. 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.

10. The method for cleaning residual brewing liquid as described in any one of claims 5 to 7, characterized in that, The brewing chamber extends vertically through the brewing cylinder. 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.

11. The method for cleaning residual brewing liquid as described in claim 1, characterized in that, Before the step of controlling the two piston components to be positioned within 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.

12. The method for cleaning residual brewing liquid as described in claim 11, characterized in that, In the step of controlling another piston to move toward the opening, the piston moves until it is flush with the opening.

13. The method for cleaning residual brewing liquid as described in any one of claims 11 to 12, characterized in that, During the steps of discharging the slag and discharging the residual brewing liquid, the movement positions of each piston component are controlled to be the same, and the discharge directions are the same.

14. A method for cleaning residual brewing liquid, applied to brewing equipment, characterized in that, The brewing device includes a brewing cylinder with a brewing chamber, two pistons that are movable relative to each other and connected to the pistons in the brewing cylinder, and a liquid passage that can be switched on and off. At least one of the two pistons can be disengaged from the brewing cylinder to form an opening in the brewing cylinder. The method for cleaning up residual brewing liquid includes: Two pistons are placed inside the brewing tank and moved away in opposite directions to form a sealed enlarged space inside the brewing tank, which draws the brewing residue in the liquid passage into the brewing tank. Control at least one of the piston components to disengage from the brewing cylinder so that residual brewing liquid in the brewing chamber can be discharged outward through the opening.

15. The method for cleaning residual brewing liquid as described in claim 14, characterized in that, The liquid passage is provided in multiple ways, including a first passage and the remaining second passages. The first passage is connected between a piston and the beverage outlet of the brewing device. At least one second passage is connected to another piston, and a valve body is provided at the connection between the two. When the step of the method for cleaning the brewing residue is performed, the valve body is in a closed state.

16. The method for cleaning residual brewing liquid as described in claim 14, characterized in that, The two piston components are a first piston component and a second piston component, the brewing cylinder has a brewing center axis X0, and the first piston component and the second piston component have a first center axis X1 and a second center axis X2, respectively; When the first piston and the second piston are disposed in the brewing cylinder, the first central axis X1, the second central axis X2 and the brewing central axis X0 coincide.

17. The method for cleaning residual brewing liquid as described in claim 16, characterized in that, The first piston can move away from the second piston to disengage outward from the brewing cylinder and form the opening; During the movement, the second central axis X2 remains collinear with the brewing central axis X0, and the first central axis X1 deviates from the brewing central axis X0 to make way for the second piston to move in the direction of the first piston in the brewing chamber, thereby driving the residual liquid in the brewing chamber to be discharged.

18. The method for cleaning residual brewing liquid as described in claim 16, characterized in that, Before the second piston moves toward the first piston within the brewing chamber, the first central axis X1 is offset from the brewing central axis X0.

19. The method for cleaning residual brewing liquid as described in claim 16, characterized in that, The second piston can move away from the first piston to disengage outward from the brewing cylinder and form the opening; 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 to move in the direction of the second piston in the brewing chamber, thereby driving the residual liquid in the brewing chamber to be discharged.

20. The method for cleaning residual brewing liquid as described in claim 19, characterized in that, Before the first piston moves toward the second piston within the brewing chamber, the second central axis X2 may be selectively deviated from the brewing central axis X0.

21. The method for cleaning residual brewing liquid as described in claim 19, characterized in that, After the deviation, the second central axis X2 is parallel to or intersects the brewing central axis X0, forming an angle.

22. A method for cleaning residual brewing liquid as described in any one of claims 14 to 21, characterized in that, The two pistons move asynchronously during movement.

23. A method for cleaning residual brewing liquid, applied to brewing equipment, characterized in that, The brewing device includes a brewing cylinder and at least one piston member detachably disposed in the brewing cylinder. The two piston members can approach each other in the brewing cylinder to press the powder for brewing the beverage, and the brewing cylinder forms an open opening after at least one piston member is detached. The method for cleaning up residual brewing liquid includes: S1: After confirming that the brewing is complete, control at least one of the piston components to disengage from the brewing cylinder outward in a first direction; S2: Control the other piston to move along the first direction and push the residue in the brewing tank out of the brewing tank; S3: Control the piston located in the brewing cylinder to reciprocate in the direction of approaching and moving away from the opening; S4: Control the piston, which has disengaged from the brewing tank, to reciprocate in the direction of approaching and moving away from the opening; S5: After the two pistons are moved into the brewing tank, they move away in opposite directions; S1 and S2 are executed at least once in a loop.

24. The method for cleaning residual brewing liquid as described in claim 23, characterized in that, The two piston components are a first piston component and a second piston component, the brewing cylinder has a brewing center axis X0, and the first piston component and the second piston component have a first center axis X1 and a second center axis X2, respectively; When both pistons are disposed in the brewing tank, the first central axis X1, the second central axis X2, and the brewing central axis X0 are collinear; At least after S2 is executed and before S3 is executed, the first central axis X1 or the second central axis X2 corresponding to the piston that has disengaged from the brewing cylinder is deviated from the brewing central axis X0.

25. The method for cleaning residual brewing liquid as described in claim 24, characterized in that, After deviating, the first central axis X1 or the second central axis X2 corresponding to the piston component that has detached from the brewing cylinder is parallel to or intersects the brewing central axis X0, forming an angle.

26. A method for cleaning residual brewing liquid as described in any one of claims 1 to 25, applied to brewing equipment, characterized in that, The brewing device also includes an input module for inputting preset parameter values; The step of controlling at least one of the piston members away from the other piston member includes: 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 away from the other piston component.

27. The method for cleaning residual brewing liquid as described in claim 26, characterized in that, The preset parameters include the specifications of the liquid-passing pipeline and / or the movement parameters of the two piston components.

28. A brewing device, characterized in that, include: The brewing module includes a brewing cylinder having a brewing chamber, two pistons movably disposed relative to the brewing cylinder, a liquid passage connected to the brewing chamber via a valve body, and a drive mechanism for driving the pistons to move. as well as, A control device electrically connected to the drive mechanism and the valve body, the control device including 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 being configured to implement the steps of the cleaning method for residual brewing liquid as described in any one of claims 1 to 27.

29. The brewing device as described in claim 28, characterized in that, The brewing device also includes an input module for inputting preset parameter values.

30. A storage medium, characterized in that, The storage medium stores a cleaning program for residual brewing liquid, which, when executed by a processor, implements the steps of the cleaning method for residual brewing liquid as described in any one of claims 1 to 27.

31. A brewing device, characterized in that, include: A brewing tank having a brewing chamber and two pistons disposed within the brewing chamber and capable of approaching or moving away from each other, the two pistons including a first piston and a second piston; The liquid passage is connected to the two piston components and connected to allow liquid to flow through. The liquid passage includes a waste discharge pipe connected to the first piston component and a liquid outlet pipe connected to the second piston component. The liquid outlet pipe connects the brewing chamber and the beverage outlet. The first piston and the second piston are located in the brewing chamber and form a sealed space with the brewing cylinder. When the first piston and the second piston move away from each other and a negative pressure is formed in the brewing chamber, the residual liquid in the outlet pipe can be drawn back into the brewing chamber from the outlet pipe. After at least one of the pistons is disengaged from the brewing cylinder, the residual brewing liquid in the brewing chamber can be discharged outward.

32. The brewing device as described in claim 31, characterized in that, The second piston is located above the first piston in the vertical direction within the brewing cylinder, and the residual liquid drawn into the brewing chamber accumulates above the first piston.

33. The brewing device as described in claim 32, characterized in that, The residual liquid accumulated in the brewing chamber at the first piston can be discharged by at least one of the following methods: The first piston disengages downward from the brewing cylinder, forming an opening at the lower end of the brewing cylinder, from which residual liquid is discharged; or, The second piston disengages upward from the brewing cylinder, forming an opening at the upper end of the brewing cylinder. The first piston then pushes the remaining liquid outward from the opening at the upper end of the brewing cylinder; or... The first piston is connected to the waste discharge pipe, and the residual brewing liquid is discharged from the first piston and the waste discharge pipe.

34. The brewing device as described in claim 33, characterized in that, When the residual brewing liquid is discharged from the waste discharge pipe, one of the following methods may be selected: The first piston and the second piston move closer to each other, and a closable valve is provided on the liquid outlet pipe connected to the second piston; or, a suction pump is provided on the waste discharge pipe from the first piston to the waste discharge pipe, wherein all channels from the waste discharge pipe to the liquid outlet pipe are connected.

35. The brewing device as described in claim 31, characterized in that, The first piston and the waste discharge pipe are equipped with valves that can be connected to the hot water boiler and can be selectively connected in pairs or completely disconnected and closed.

36. The brewing device as described in claim 31, characterized in that, The first piston and the second piston clamp the powder cake in the brewing chamber of the brewing tank for extraction. The direction in which the residue cake after extraction is discharged from the brewing chamber is the same as the direction in which the brewing residue is discharged.

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