Brewing residual liquid cleaning method, brewing equipment and storage medium

Abstract

The invention discloses a cleaning method for brewing residual liquid, brewing equipment and a storage medium. The cleaning method for the brewing residual liquid comprises the steps that two piston pieces are controlled to move into a brewing cavity; and at least one piston piece is controlled to be close to or far away from the other piston piece so as to drive the brewing residual liquid to be discharged from the liquid passing pipeline. By operating at least one piston part to move close to or away from the other piston part, brewing residual liquid remaining in the brewing cavity and / or the liquid passing pipeline can be sucked into the brewing cavity in a concentrated mode or pushed to the outlet end of the liquid passing pipeline in a concentrated mode, timely recovery treatment of the brewing residual liquid is facilitated, and the service life of the brewing device is prolonged. Abnormities of deterioration, pollution, pipeline blockage and the like caused by long-time residual of brewing residual liquid are effectively prevented, and the brewing device has the advantage of being easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of brewing equipment, and in particular to a method for cleaning brewing residual liquid, a brewing equipment and a storage medium. Background Art

[0002] After each brewing, the brewing cylinder in the brewing device will pump out the beverage in the brewing cavity through the pump body and, for example, the liquid outlet pipeline, and the brewing residual liquid remaining in the brewing cavity will be discharged outwardly through, for example, the waste outlet pipeline. Or it can be cleaned by flushing with water, and the residual liquid will be discharged from the beverage outlet, which will affect the efficiency of beverage preparation, and the residual liquid will flow into the beverage because the beverage is not taken away in time after the beverage is prepared. During long-term use, the inner cavity of the brewing cylinder and the piston parts will be cleaned according to the set cycle, but the brewing residual liquid in, for example, the liquid outlet pipeline and the waste outlet pipeline is easy to be retained, easy to deteriorate and form peculiar smell, and to a certain extent affect the quality of subsequent beverage preparation. Especially in the journey of the pipeline from the brewing cylinder to the beverage outlet. Summary of the invention

[0003] The main purpose of the present invention is to provide a method for cleaning brewing residual liquid, a brewing device and a storage medium, aiming to solve the problem that the brewing residual liquid in some liquid passages connected to the brewing chamber in traditional brewing devices is not cleaned in time, thereby reducing the brewing quality.

[0004] To achieve the above-mentioned purpose, the present invention provides a method for cleaning brewing residual liquid, which is applied to a brewing device, wherein the brewing device includes a brewing cylinder having a brewing cavity, two pistons disposed in the brewing cavity and capable of relative movement, and a liquid passage pipeline connected to the brewing cavity in an on-off manner;

[0005] The cleaning method of the brewing residual liquid comprises:

[0006] Controlling the two pistons to move into the brewing chamber;

[0007] At least one of the pistons is controlled to move closer to or farther from another piston, so as to drive the residual brewing liquid to be discharged from the liquid passage.

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

[0009] Optionally, the step of controlling at least one of the piston members to move closer to or farther away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline includes:

[0010] At least one of the pistons is controlled to be close to another piston, so as to drive the brewing residual liquid to be pushed outward from the liquid passage.

[0011] Optionally, the step of controlling at least one of the piston members to move closer to or farther away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline includes:

[0012] Controlling at least one of the pistons to move away from the other piston, so as to drive the residual brewing liquid to be sucked from the liquid passage into the brewing chamber;

[0013] The brewing residual liquid in the brewing chamber is separated from the liquid passing pipeline.

[0014] Optionally, the liquid passage pipeline is provided in plurality, and they are respectively a first pipeline and the remaining second pipelines;

[0015] The step of controlling at least one of the piston members to approach or move away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline comprises:

[0016] Controlling the first pipeline to be connected to the brewing chamber and each of the second pipelines to be isolated from the brewing chamber;

[0017] At least one of the pistons is controlled to move closer to or farther away from another piston, so as to drive the brewing residual liquid to be discharged from the first pipeline.

[0018] Optionally, the first pipeline is a waste discharge pipeline.

[0019] Optionally, one of the second pipelines is a water injection pipeline;

[0020] After the step of controlling at least one of the pistons to move closer to or farther from the other piston to drive the residual brewing liquid to be discharged from the first pipeline, the method includes:

[0021] Controlling the water injection pipeline to be connected to the brewing chamber, and injecting clean water into the brewing chamber;

[0022] The brewing residual liquid in the brewing cavity is discharged outwardly.

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

[0024] The two pistons are controlled to be disposed in the brewing chamber and spaced apart by a preset distance.

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

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

[0027] The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises:

[0028] Controlling at least one of the pistons to disengage from the brewing chamber;

[0029] The other piston member is controlled to move toward the opening so as to discharge the residual brewing liquid in the brewing cavity outward through the opening.

[0030] Optionally, the brewing cavity passes through the brewing cylinder in an up-down direction, and the two piston members are respectively a first piston member and a second piston member arranged in sequence from bottom to top, and the first piston member can be detached from the brewing cavity to form an opening at the brewing cylinder;

[0031] The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises:

[0032] The first piston is controlled to move downward in the brewing chamber until it is disengaged from the brewing chamber.

[0033] Optionally, the brewing cavity passes through the brewing cylinder in an up-down direction, and the two piston members are respectively a first piston member and a second piston member arranged in sequence from bottom to top, and the second piston member can be detached from the brewing cavity to form an opening at the brewing cylinder;

[0034] The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises:

[0035] Controlling the second piston to move upward in the brewing chamber until it is disengaged from the brewing chamber;

[0036] The first piston is controlled to move toward the opening so as to discharge the residual brewing liquid in the brewing cavity outward through the opening.

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

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

[0039] Controlling at least one of the pistons to disengage from the brewing chamber;

[0040] The other piston member is controlled to move toward the opening to discharge the residue in the brewing chamber outward through the opening.

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

[0042] Optionally, when performing the step of discharging the residue outwards and the step of discharging the brewing residual liquid outwards, the movement orientations of the piston members are controlled to be the same and the discharging directions are the same.

[0043] In addition, to achieve the above-mentioned purpose, the present invention also provides a method for cleaning brewing residual liquid, which is applied to a brewing device, wherein the brewing device comprises a brewing cylinder with a brewing cavity, two pistons disposed in the brewing cylinder and relatively movable, and a liquid passing pipeline connected to the pistons in an on-off manner, wherein at least one of the two pistons can be detached from the brewing cylinder to form an opening at the brewing cylinder;

[0044] The cleaning method of the brewing residual liquid comprises:

[0045] The two pistons are arranged in the brewing cylinder and moved away from each other in opposite directions to form a closed enlarged space in the brewing cylinder, and the enlarged space sucks the brewing residual liquid in the liquid passage into the brewing cylinder;

[0046] At least one of the pistons is controlled to be disengaged from the brewing cylinder to allow the brewing residual liquid in the brewing cavity to be discharged outward through the opening.

[0047] Optionally, the liquid passing pipeline is provided in plurality, and includes a first pipeline and the remaining second pipelines, the first pipeline is connected between one of the piston members and the beverage outlet of the brewing device, at least one of the second pipelines is connected to another of the piston members, and a valve body is provided at the connection point between the two, and when executing the steps of the method for cleaning the residual brewing liquid, the valve body is in a closed state.

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

[0050] Optionally, the first piston member can move in a direction away from the second piston member until it is outwardly separated from the brewing cylinder and forms the opening;

[0051] During the movement, the second center axis X2 remains collinear with the brewing center axis X0, and the first center axis X1 deviates from the brewing center axis X0 to make room for the second piston member to move toward the first piston member in the brewing chamber, thereby driving the residual liquid in the brewing chamber to be discharged.

[0052] Optionally, before the second piston member moves in the brewing chamber toward the first piston member, the first center axis X1 deviates from the brewing center axis X0.

[0053] Optionally, the second piston member can move in a direction away from the first piston member until it is outwardly separated from the brewing cylinder and forms the opening;

[0054] The first center axis X1 is collinear with the brewing center axis X0, and the second center axis X2 is collinear with or deviates from the brewing center axis X0, so as to allow the first piston to move toward the second piston in the brewing chamber to drive the residual liquid in the brewing chamber to be discharged.

[0055] Optionally, before the first piston member moves in the brewing chamber toward the second piston member, the second center axis X2 may selectively deviate from the brewing center axis X0.

[0056] Optionally, after the deviation, the second center axis X2 is parallel to or intersects with the brewing center axis X0 to form an angle.

[0057] Optionally, the two piston members move asynchronously when moving.

[0058] In addition, to achieve the above-mentioned purpose, the present invention also provides a method for cleaning brewing residual liquid, which is applied to a brewing device, characterized in that the brewing device comprises a brewing cylinder and at least one piston member detachably arranged in the brewing cylinder, two piston members can be close to each other in the brewing cylinder to press powder to brew a beverage, and after at least one of the piston members is detached, the brewing cylinder forms an open mouth;

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

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

[0061] S2: controlling the other piston to move along the first direction, and pushing the residue in the brewing cylinder out of the brewing cylinder;

[0062] S3: controlling the piston member in the brewing cylinder to reciprocate in a direction approaching and away from the opening;

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

[0064] S5: controlling the two pistons to move into the brewing cylinder and then move away in opposite directions;

[0065] The S1 and S2 are executed at least once in a loop.

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

[0067] When the two pistons are disposed in the brewing cylinder, the first center axis X1, the second center axis X2 and the brewing center axis X0 are collinear;

[0068] At least after executing S2 and before executing S3, the first center axis X1 or the second center axis X2 corresponding to the piston member detached from the brewing cylinder is controlled to deviate from the brewing center axis X0.

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

[0070] In addition, to achieve the above-mentioned purpose, the present invention also provides a method for cleaning brewing residual liquid, which is applied to a brewing device, wherein the brewing device includes a brewing cylinder having a brewing cavity, two pistons disposed in the brewing cavity and relatively movable, a liquid passage pipeline connected to the brewing cavity and disconnectable, and an input module, wherein the input module is used to input an input value of a preset parameter;

[0071] The cleaning method of the brewing residual liquid comprises:

[0072] Controlling the two pistons to move into the brewing chamber;

[0073] The input value input by the input module is obtained, and according to the input value, at least one of the piston members is controlled to translate closer to or farther from another piston member, so as to drive the brewing residual liquid in the liquid passage pipeline to be discharged from the liquid passage pipeline.

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

[0075] In addition, to achieve the above-mentioned purpose, the present invention also provides a brewing device, comprising:

[0076] The brewing module comprises a brewing cylinder having a brewing cavity, two pistons 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 pistons to move; and

[0077] A control device is electrically connected to the driving mechanism and the valve body, respectively, and includes a memory, a processor, and a brewing residual liquid cleaning program stored in the memory and executable on the processor, wherein the brewing residual liquid cleaning program is configured to implement the steps of the brewing residual liquid cleaning method as described above.

[0078] Optionally, the brewing device further comprises an input module, and the input module is used to input input values ​​of preset parameters.

[0079] In addition, to achieve the above-mentioned purpose, the present invention also provides a storage medium, on which a program for cleaning brewing residual liquid is stored. When the program for cleaning brewing residual liquid is executed by a processor, the steps of the method for cleaning brewing residual liquid as described above are implemented.

[0080] In addition, to achieve the above-mentioned purpose, the present invention also provides a brewing device, comprising:

[0081] A brewing cylinder is formed with a brewing cavity and two piston members arranged in the brewing cavity and capable of approaching or moving away from each other, wherein the two piston members include a first piston member and a second piston member;

[0082] a liquid-passing pipeline, connected to the two piston members respectively and communicating for liquid to flow through, the liquid-passing pipeline comprising a waste discharge pipeline connected to the first piston member and a liquid outlet pipeline connected to the second piston member, the liquid outlet pipeline communicating the brewing chamber with a beverage outlet;

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

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

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

[0086] The first piston member is disengaged downward from the brewing cylinder 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 disengaged from the brewing cylinder upwards to form an opening at the upper end of the brewing cylinder, and the first piston member pushes the residual liquid outwards from the opening at the upper end of the brewing cylinder upwards; or,

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

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

[0090] The first piston member and the second piston member move toward each other, and a closable valve body is provided on the liquid outlet pipeline connected to the second piston member; or,

[0091] A suction pump body is arranged from the first piston member to the waste discharge pipeline, wherein the passages from the waste discharge pipeline to the liquid outlet pipeline are all connected.

[0092] Optionally, the first piston member and the waste pipe are provided with valve bodies for connecting to a hot water boiler for brewing and can be selectively connected in pairs or completely disconnected and closed.

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

[0094] In the technical solution provided by the present invention, the 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 to be located in the brewing cavity, they jointly enclose and define the brewing cavity located between the two piston members, and the liquid-passing pipeline connecting the brewing cavity; then, by operating at least one piston member to move closer 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 concentratedly sucked into the brewing cavity, or concentratedly pushed to the outlet end of the liquid-passing pipeline, which is helpful for timely recovery of the brewing residual liquid, effectively preventing abnormalities such as deterioration, pollution and blockage of the pipeline caused by the long-term residue of the brewing residual liquid, and has the characteristics of simple operation. In addition, when the brewing module is used in the brewing device, there is no need to set up an additional pump or bypass branch in the pipeline between the brewing cylinder and the beverage outlet, and only a complete liquid-passing pipeline is required, which helps to simplify the pipeline layout of the whole machine, avoid the accumulation of beverages in the pipeline, and is convenient to clean at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0096] Figure 1 A longitudinal sectional schematic diagram of a first embodiment of a brewing module provided by the present invention;

[0097] Figure 2 A longitudinal sectional schematic diagram of a second embodiment of the brewing module provided by the present invention;

[0098] Figure 3 A longitudinal sectional schematic diagram of a third embodiment of the brewing module provided by the present invention;

[0099] Figure 4 A schematic diagram of the brewing module provided by the present invention in an initial state when performing an upper slag discharge operation;

[0100] Figure 5 for Figure 4 A schematic diagram of the second piston member after it moves upward;

[0101] Figure 6 for Figure 4 A schematic diagram of the first piston member during the upward movement;

[0102] Figure 7 for Figure 4 A schematic diagram of the first piston member after it moves upward;

[0103] Figure 8 A schematic diagram of the brewing module provided by the present invention in an initial state when performing a lower slag discharge operation;

[0104] Fig. 9 for Figure 8 A schematic diagram of the first piston member during downward movement;

[0105] Fig.10 for Figure 8 A schematic diagram of the first piston member after it moves out of the brewing cylinder;

[0106] Fig.11 for Figure 8 A schematic diagram of the second piston member after it moves downward;

[0107] Fig.12 A schematic diagram of the structure of a control device for a hardware operating environment involved in an embodiment of the present invention;

[0108] Fig.13The present invention is a schematic flow chart of an embodiment of a method for cleaning brewing residual liquid provided by the present invention.

[0109] Description of Figure Numbers:

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

[0111] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0112] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0113] It should be noted that if the embodiments of the present invention 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 status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0114] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0115] See also Figures 1 to 12The present invention provides a brewing device, which includes a brewing module and a control device 400. The brewing module includes a brewing cylinder 100 formed with a brewing cavity 110, two pistons detachably arranged in the brewing cavity 110 and movable relative to the brewing cylinder 100, a liquid-passing pipeline connected to the brewing cavity 110 through a valve body, and a driving mechanism for driving the piston to move. The liquid-passing pipeline can be set to one or at least two. When the liquid-passing pipeline is set to at least two, each liquid-passing pipeline is a first pipeline and a remaining second pipeline; the control device 400 is electrically connected to the driving mechanism and the valve body, respectively.

[0116] Among them, the brewing module is mainly used for brewing and extracting powder materials such as coffee powder, soybean powder, tea leaves, and finally obtaining beverages such as coffee, soybean milk, and tea leaves. The brewing cylinder 100 is provided with a brewing cavity 110 along the first direction. The present design does not limit the first direction, and it can be set to any direction according to actual needs. For example, the brewing cylinder 110 can be arranged in the up-down direction, or it can be arranged in the horizontal direction or inclined relative to the up-down direction / lateral direction, all within the protection scope defined by the present invention. However, for ease of understanding, in the following embodiments, the first direction is taken as the gravity direction, that is, the up-down direction, and the brewing cylinder 100 is provided with a brewing cavity 110 in the up-down direction as an example for explanation. At this time, the brewing cavity 110 has two openings, namely, an upper opening and a lower opening. Correspondingly, at least at the brewing cavity 110, two piston members are arranged in sequence in the up-down direction, and at least one of them has a moving stroke in the up-down direction. For ease of understanding, the following defines two piston members as a first piston member 210 and a second piston member 220 arranged sequentially from bottom to top (at least at the brewing chamber 110). The first piston member 210 can selectively move out of the brewing chamber 110 and enter the brewing chamber 110 through the lower end opening of the brewing chamber 110; the first piston member 210 can have a first moving stroke in the brewing chamber 110 along the up-down direction. And / or, the second piston member 220 can selectively move out of the brewing chamber 110 and enter the brewing chamber 110 through the upper end opening of the brewing chamber 110, and the second piston member 220 can have a second moving stroke in the brewing chamber 110 along the up-down direction.

[0117] The brewing module may further include at least one set of driving mechanisms. The driving mechanisms are drivingly connected to 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 mechanisms are also electrically connected to the control device 400 to realize intelligent automatic driving of the first piston member 210 and / or the second piston member 220 under the control of the control device 400.

[0118] The brewing module may also include a plurality of liquid-passing pipelines that can be connected to the brewing chamber 110 in a switchable manner. The liquid-passing pipeline is also a pipeline for liquid circulation. The liquid-passing pipeline may be, for example, a water injection pipeline 320 that connects an external water source to the brewing chamber 110. The water injection pipeline 320 is connected to an external water source or a brewing hot water boiler, and when the water injection pipeline 320 is connected to the brewing chamber 110, the water from the external water source is connected to the brewing chamber 110. The water provided by the water source may be, but is not limited to, clean water at room temperature, high temperature or low temperature, high temperature steam, etc. The liquid-passing pipeline may also be, for example, a liquid outlet pipeline, a waste outlet pipeline 310, etc. that connects the liquid in the brewing chamber 110 to the outside. When the liquid outlet pipeline is connected to the brewing chamber 110, the beverage prepared in the brewing chamber 110 may be discharged to, for example, a beverage outlet. When the waste discharge pipe 310 is connected to the brewing chamber 110 , the waste liquid in the brewing chamber 110 can be discharged to, for example, a waste liquid tank.

[0119] Among them, the liquid-passing pipeline and the brewing chamber 110 are connected in an on-off manner through, for example, a valve body. There are many types of valve bodies, and specifically, they can be a three-way valve 330, a switch valve, etc. as described below. The driving force for the liquid flow between the liquid-passing pipeline and the brewing chamber 110 can come from, for example, a pump body. In practical applications, for example, the liquid outlet pipeline can be connected to the brewing chamber 110 by penetrating the second piston member 220; for example, the waste discharge pipeline 310 and the water injection pipeline 320 can both be connected to a main pipeline through the three-way valve 330, and then the main pipeline is connected to the brewing chamber 110 by penetrating the first piston member 210, wherein the three-way valve 330 can be selectively opened and closed to achieve conduction or cutoff between the waste discharge pipeline 310, the water injection pipeline 320 and the brewing chamber 110.

[0120] In other embodiments, a normally closed structure may not be provided, and an independent switch valve 350 may be used to cut off the pipeline entering the brewing chamber 110.

[0121] In view of the above, it can be known that during long-term use, a local pipeline section in the liquid-passing pipeline, such as the pipeline section between the valve body and the brewing chamber 110, may easily retain residual brewing liquid. For this reason, the present invention defines each liquid-passing pipeline as a first pipeline and a remaining second pipeline. Taking the liquid-passing pipeline as an example, when the first pipeline is a waste discharge pipeline 310, the second pipeline is also a liquid discharge pipeline and a water injection pipeline 320. When the first pipeline is a liquid discharge pipeline, the second pipeline is also a waste discharge pipeline 310 and a water injection pipeline 320. Of course, the first pipeline can be one, or specifically 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 powdered materials. Or according to actual needs, the brewing device can also selectively integrate one or more of the grinding module, milk supply module, etc. to form a fully automatic beverage preparation device.

[0123] In addition, in one embodiment, the brewing device may further include an input module. The input module may be, but is not limited to, a touch panel or other components. At least one preset parameter is pre-set on the input interface of the input module. When the user operates based on the input module, the input value of each preset parameter may be input accordingly. The preset parameters may be, but are not limited to, the specification parameters of the at least one liquid passage and / or the motion parameters of the two piston members. The specification parameters of the liquid passage may be, but are not limited to, the diameter, volume, length, material, etc. of the liquid passage; the motion parameters of the two piston members may be, but are not limited to, the spacing between the two piston members, the moving direction, moving speed, and moving distance of any piston member, etc.

[0124] Reference Fig.12 , Fig.12 It is a schematic diagram of the structure of a control device 400 of a hardware operating environment involved in an embodiment of the present invention.

[0125] like Fig.12 As shown, the control device 400 may 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. Among them, the communication bus 420 is used to realize the connection and communication between these components. The user interface 430 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 430 may also include a standard wired interface and a wireless interface. The network interface 440 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 450 may be a high-speed random access memory 450 (Random Access Memory, RAM) memory 450, or a stable non-volatile memory 450 (Non-Volatile Memory, NVM), such as a disk memory 450. The memory 450 may also be a storage device independent of the aforementioned processor 410.

[0126] Those skilled in the art will understand that Fig.12 The structure shown in the figure does not constitute a limitation on the control device 400, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0127] like Fig.12 As shown, the memory 450 as a storage medium may include an operating system, a network communication module, a user interface 430 module, and a program for cleaning up residual brewing liquid.

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

[0129] The embodiment of the present invention provides a method for cleaning brewing residual liquid, referring to Fig.13 , Fig.13 The figure is a schematic flow chart of a first embodiment of a method for cleaning brewing residual liquid according to the present invention.

[0130] In this embodiment, the method for cleaning the brewing residual liquid includes the following steps:

[0131] Step A2: Control the two pistons to move into the brewing chamber 110;

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

[0133] Among them, the present design does not limit the execution time of the cleaning operation of the brewing residual liquid. According to actual needs, the cleaning operation of the brewing residual liquid can be performed after one or at least two slag discharge operations or after the cleaning of the entire brewing pipeline is completed. Among them, the slag discharge operation can be performed after one or at least two beverage preparation operations. Preferably, after each beverage is made, at least one slag discharge operation is performed from the brewing cylinder 100, and then at least one brewing residual liquid cleaning operation can be performed. The beverage preparation operation is also the operation process of brewing and extracting the powder to obtain the beverage. Specifically, the beverage preparation operation includes: controlling the first piston member 210 to be set in the brewing chamber 110, covering the lower end opening of the brewing chamber 110, and reserving enough powder receiving space in the brewing chamber 110. The second piston member 220 is discharged outward from the brewing chamber 110, so that the upper end opening of the brewing chamber 110 is opened, and the powder can be connected to the brewing chamber 110. Then, the second piston 220 moves from the upper opening into the brewing chamber 110. The first piston 210 and / or the second piston 220 move toward each other to achieve the purpose of pressing the powder into a powder cake. Finally, the water injection pipeline 320 is connected to the brewing chamber 110, and high-temperature hot water is connected to the brewing chamber 110 to brew and extract the powder cake to obtain a beverage.

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

[0135] In one embodiment, at least one of the two pistons can be disengaged from the brewing chamber 110 to form an opening at the brewing cylinder 100. Based on this, the following steps may be included before step A2:

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

[0137] Step A12: Control another piston member to move toward the opening to discharge the residue in the brewing chamber 110 outward through the opening.

[0138] Please combine Figures 4 to 7 Specifically, in one embodiment, when the two piston members are the first piston member 210 and the second piston member 220 as described above, an upper slag removal operation may be performed, that is:

[0139] Control the second piston 220 to be discharged upward from the brewing chamber 110 to the outside of the brewing chamber 110; and,

[0140] The first piston member 210 is controlled to translate upward at least until it is flush with the upper opening of the brewing chamber 110 , so as to discharge the residue in the brewing chamber 110 upward.

[0141] It can be understood that the first movement stroke of the first piston member 210 in the brewing cylinder is greater than the movement stroke of the second piston member 220. Firstly, based on the above-mentioned beverage preparation operation, the second piston member 220 is translated upward to be discharged outward through the upper end opening of the brewing chamber 110, so that the upper end opening of the brewing chamber 110 is opened. Then the first piston member 210 is controlled to translate 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 kept in sealed contact, during the translation process, the residues received by the upper end of the first piston member 210 and the residues remaining on the inner cavity wall of the brewing chamber 110 can be driven by the first piston member 210 to move upward. The first piston member 210 at least translates upward to be flush with the upper end opening of the brewing chamber 110, or can be further moved upward to extend upward from the upper end opening of the brewing chamber 110, so that the residue cake on the first piston member 210 can be scraped off by a scraper, for example, and the residue cake can be pushed out laterally by rotating the brewing cylinder 100 or other methods, including but not limited to mechanical active pushing; or the residue on the first piston member 210 can be cleaned by water, for example.

[0142] The distance H1 that the second piston 220 moves upward to leave the upper opening of the brewing chamber 110 is greater than the thickness H0 of the slag cake, so that the slag cake can be completely pushed out of the brewing chamber 110 without being blocked by the second piston 220 .

[0143] Please combine 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, a lower slag discharge operation may be performed, that is:

[0144] Controlling the first piston 210 to be discharged downward from the brewing chamber 110 to the outside of the brewing chamber 110;

[0145] The second piston 220 is controlled to translate downward at least to be flush with the lower 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 movement stroke of the first piston member 210 in the brewing cylinder is smaller than the movement stroke of the second piston member 220. Firstly, based on the above-mentioned beverage preparation operation, the first piston member 210 is translated downward to be discharged outward through the lower end opening of the brewing chamber 110, so that the lower end opening of the brewing chamber 110 is opened. In this process, part of the residue received by the upper end of the first piston member 210 will be taken away from the brewing chamber 110 by the first piston member 210, and then can be used for subsequent scraping, for example, of the residue on the first piston member 210; or can be used for subsequent cleaning, for example, of the residue on the first piston member 210 by 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 wall of the brewing chamber 110 are kept in sealed contact, during the translation process, the residue cake remaining on the inner wall of the brewing chamber 110 can be driven by the second piston member 220 to move downward, and finally discharged outward through the lower end opening of the brewing chamber 110. The second piston member 220 translates downward at least to be flush with the lower end opening of the brewing chamber 110, or can further move downward to extend downward from the lower end opening of the brewing chamber 110, so as to ensure that the residue remaining on the inner wall of the brewing chamber 110 can be scraped off.

[0147] Among them, the preferred embodiment is that the distance H2 that the first piston member 210 moves downward to leave the lower end opening of the brewing chamber 110 is less than the thickness H0 of the slag cake, so as to avoid the slag cake adhering to the upper surface of the first piston member 210 due to gravity and being unable to be removed as the first piston member 210 moves. In the above embodiment, the upper slag discharge operation can control the first piston member 210 to translate upward to fully extend out of the upper end opening, or translate upward to be flush with the upper end opening; the lower slag discharge operation can control the second piston member 220 to translate downward to fully extend out of the lower end opening, or translate downward to be flush with the lower end opening, which can be specifically set according to actual needs. When the first piston member 210 translates to be flush with the upper end opening and the second piston member 220 translates to be flush with the lower end opening, it is helpful to reduce the active stroke of the first piston member 210 / the second piston member 220 as much as possible on the basis of achieving the purpose of slag discharge.

[0148] It should be noted that in the above two preferred embodiments, whether it is the upper slag discharge operation or the lower slag discharge operation, a relative displacement is required between at least one piston member and the brewing cylinder 100. Then, the relative displacement can be achieved by the brewing cylinder 100 being fixed and the first piston member 210 and / or the second piston member 220 being driven directly by the driving mechanism to move in translation; or the first piston member 210 and / or the second piston member 220 being fixed and the brewing cylinder 100 being moved, for example, by rotating the brewing cylinder 100, translating the brewing cylinder 100 or by other means. In other embodiments, if the upper slag discharge operation is adopted, the piston member and the brewing cylinder 100 can be controlled not to have a relative displacement, and the slag cake can be scraped off in the form of a mechanical arm.

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

[0150] The cleaning operation of brewing residual liquid can also be directly triggered by the user's manual operation. For example, a trigger unit can be preset at the display and control panel of the whole machine, and when the user triggers the trigger unit, the whole machine automatically performs the cleaning operation of brewing residual liquid.

[0151] Before executing step A2, if the first piston member 210 and / or the second piston member 220 are outside the brewing chamber 110, it is necessary to operate the first piston member 210 and / or the second piston member 220 to move into the brewing chamber 110. If the first piston member 210 and / or the second piston member 220 are already in the brewing chamber 110, it is assumed that this 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 spacing between them is not limited and can be specifically set according to subsequent operations (such as step A3). The first piston member 210 and the second piston member 220 can be completely abutted, or can be spaced to form a preset distance, and a first chamber is defined between the first piston member 210 and the second piston member 220.

[0153] Step A3: Control at least one piston member to move closer to or farther away from another piston member, so as to drive the residual brewing liquid to be discharged from the liquid passage.

[0154] In this 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-passing pipeline can be connected to the first chamber by, for example, controlling the valve body to be in an open state. At this time, when at least one piston member moves closer to or away from another piston member, the internal and external pressure difference between the first chamber and the liquid-passing pipeline can be changed, thereby driving the brewing residual liquid in the brewing chamber 110 and / or the liquid-passing pipeline to move toward the target area.

[0155] It should be emphasized that in a brewing module or brewing device, only one liquid passing pipeline can be provided, or several liquid passing pipelines can be provided according to actual needs. And each liquid passing pipeline can be connected by a valve body individually or shared by at least two liquid passing pipelines to realize the conduction control and cutoff control between the liquid passing pipeline and the first chamber. In this case, one of the liquid passing pipelines is the first pipeline, and the rest is the second pipeline, so step A3 can specifically include:

[0156] Step A34: controlling the first pipeline to be connected to the brewing chamber 110 and the second pipelines to be isolated from the brewing chamber 110;

[0157] It can be understood that 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. Therefore, in this step, it is necessary to ensure that only the first pipeline is connected to the brewing chamber 110, and the remaining second pipelines are isolated from the brewing chamber 110. Among them, the first pipelines that are connected to the brewing chamber 110 at the same time can be one or at least two. The other end of the first pipeline that is not connected to the brewing chamber 110 is kept open.

[0158] Step A35: Control at least one piston member to translate toward or away from another piston member, so as to drive the residual brewing liquid to be discharged from the first pipeline.

[0159] It is understood that by operating at least one piston member to translate toward or away from another piston member, the pressure difference between the inside and outside of the first pipeline can be changed, thereby driving the brewing chamber 110 and / or the brewing residual liquid in the first pipeline to move toward the target area. The first pipeline can be specifically a waste discharge pipeline 310.

[0160] In order to completely transfer the brewing residual liquid in the liquid-passing pipeline to the target area, in a specific application, the volume change caused by the translational movement of the piston is set to be no less than the volume of the liquid-passing pipeline. Taking the first pipeline as an example, the volume change caused by the translational movement of the piston is no less than the volume of the first pipeline. Specifically, the product of the translational distance of the piston and the maximum end area of ​​its own piston head is R1, and the total volume of the pipe section connected to the first pipeline 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 translational distance of the piston can be specifically adjusted.

[0161] The determination method of the parameters such as the volume of the first pipeline and the volume change caused by the translation of the piston can directly call the system default value, or can also be obtained by the user's active input. Based on this, in one embodiment, the brewing module and / or brewing device also includes the input module as described above. The input module pre-displays one or at least two preset parameters for user operation. Then the cleaning method of the brewing residual liquid specifically includes:

[0162] Step C2: Control the two pistons to move into the brewing chamber;

[0163] Step C3: obtaining an input value input by the input module, and controlling at least one of the pistons to translate closer to or farther from another piston according to the input value, so as to drive the residual brewing liquid in the liquid passage pipeline to be discharged from the liquid passage pipeline.

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

[0165] In the above steps, specifically, only the first piston member 210 translates, only the second piston member 220 translates, or both the first piston member 210 and the second piston member 220 translate.

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

[0167] Step A31: Control at least one piston member to translate closer to another piston member, so as to drive the brewing residual liquid to be pushed outward from the liquid passage.

[0168] Take the first pipeline as an example, that is, in this step, the target area is a component such as a slag box, a water collecting tank, etc. that is connected to the other end of the first pipeline. By operating the first piston member 210 to move up and / or the second piston member 220 to move down, the brewing residual liquid in the first chamber between the two can be pushed toward the first pipeline, and the brewing residual liquid at the first pipeline can be pushed toward the slag 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 pipeline. If this step is specifically taken to discharge the brewing residual liquid, then in the above step A2, a sufficient translation distance needs to be reserved between the first piston member 210 and the second piston member 220, so that the brewing residual liquid in the brewing chamber 110 and / or the first pipeline can be completely pushed out.

[0169] Or in another embodiment, step A3 may also include:

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

[0171] Step A33: discharge the remaining brewing liquid in the brewing chamber 110 to the outside.

[0172] Taking the first pipeline as an example, that is, in this embodiment, the target area is firstly the brewing chamber 110. Then, the residual brewing liquid in the brewing chamber 110 is discharged to the outside, so as to achieve the purpose of discharging the residual brewing liquid from the whole machine.

[0173] When at least one of the two pistons can be disengaged from the brewing chamber 110 to form an opening at the brewing cylinder 100, the above step A33 may specifically include:

[0174] Step A331: controlling at least one of the pistons to disengage from the brewing chamber 110;

[0175] Step A332: Control another piston member to move toward the opening to discharge the remaining brewing liquid in the brewing chamber 110 outward through the opening.

[0176] Specifically, when the first piston member 210 can be disengaged from the brewing chamber 110, the step A331 can be specifically as follows:

[0177] Step A333 : controlling the first piston 210 to move downward in the brewing chamber 110 until it is separated from the brewing chamber 110 .

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

[0179] Alternatively, when the second piston member 220 can be disengaged from the brewing chamber 110, the step A331 may specifically include:

[0180] Step A334: controlling the second piston 220 to move upward in the brewing chamber 110 until it is separated from the brewing chamber 110;

[0181] Step A335: Control the first piston 210 to move toward the upper opening to discharge the remaining brewing liquid in the brewing chamber 110 outward through the upper opening.

[0182] Specifically, the second piston member 220 is first operated to move upward in the brewing chamber 110, and moves out of the brewing chamber 110, so that the upper end opening of the brewing chamber 110 is opened. Then, the first piston member 210 is controlled to move upward. During the upward movement of the first piston member 210, the brewing residual liquid collected in the brewing chamber 110 can be driven to move upward synchronously. 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 moved upward to extend upward from the upper end opening of the brewing chamber 110 to completely push out the brewing residual liquid.

[0183] It should be noted that when the same brewing module / brewing device can perform the slag discharge operation and the brewing residual liquid cleaning operation separately and independently according to the preset program, then the slag discharge direction and the brewing residual liquid discharge direction can be selected to be consistent as much as possible, and the movement direction of each piston member can be controlled to be as consistent as possible. For example, when the first movement stroke of the first piston member 210 set in a brewing device is greater than the second movement stroke of the second piston member 220, then the step A3 in the above-mentioned operation of cleaning the brewing residual liquid can specifically set the second piston member 220 to be fixed, and the first piston member 210 to move closer to or away from the second piston member 220. The slag discharge method can specifically be upper slag discharge. And step A3 can specifically include steps A334 to A335.

[0184] On the contrary, when the first moving stroke of the first piston member 210 in a brewing device is smaller than the second moving stroke of the second piston member 220, the step S400 in the above-mentioned operation of cleaning the brewing residual liquid, for example, can be specifically arranged that the first piston member 210 is fixed, and the second piston member 220 is translated closer to or farther from the first piston member 210. The slag discharge method can specifically be lower slag discharge. And step A3 can specifically include step A333.

[0185] In view of the above, after performing one or several cleaning operations of brewing residual liquid on the brewing chamber 110 and / or the liquid passing pipeline (for example, the operation may be performed to step A35), the following operations may be selectively performed:

[0186] Step A37: controlling the water injection pipeline 320 to be connected to the brewing chamber 110, and injecting clean water into the brewing chamber 110;

[0187] Step A38: Discharge the remaining brewing liquid in the brewing chamber 110 to the outside.

[0188] In this embodiment, by controlling the water injection pipeline 320 to be connected to the brewing chamber 110, external clean water, high-temperature steam, etc. can be injected into the brewing chamber 110, thereby achieving flushing of the brewing chamber 110. In this process, taking the liquid-passing pipeline including the first pipeline as an example, the first pipeline can be connected to the brewing chamber 110, that is, the first pipeline can be flushed at the same time; of course, the first pipeline can also be isolated from the brewing chamber 110, that is, only the brewing chamber 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 may be discharged outside the brewing chamber 110, so that the upper end and / or the lower end of the brewing chamber 110 are open. At this time, by injecting a volume of water not less than the current empty space of the brewing chamber 110 into the brewing chamber 110, the empty space of the entire brewing chamber 110 can be flushed. And during the flushing process, waste water is continuously discharged. Among them, if the first piston member 210 moves into the brewing chamber 110 and the second piston member 220 moves outside the brewing chamber 110, the volume of the current empty space of the brewing chamber 110 is also 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 220 moves into the brewing chamber 110 and the first piston 210 moves out of the brewing chamber 110, the current empty space volume of the brewing chamber 110 is the volume of the chamber from the lower end surface of the second piston 220 to the lower end opening of the brewing chamber 110. If both the first piston 210 and the second piston 220 move out of the brewing chamber 110, the current empty space volume of the brewing chamber 110 is the total volume of the brewing chamber 110.

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

[0191] Step A36: Control the two pistons to move until they are both located in the brewing chamber 110 and are separated 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 water into the brewing chamber 110 that is not less than the volume of the current empty space of the brewing chamber 110, the empty space of the entire 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. Among them, the current empty space volume 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 may specifically refer to the above step A33, that is, it may specifically be step A333, or it may include steps A334 to A335.

[0194] In the technical solution provided by the present invention, the outer peripheral side wall of the piston member and the side cavity wall of the brewing cavity 110 are sealed and abutted, so that when the two piston members are moved to be located in the brewing cavity 110, they jointly enclose and define the brewing cavity 110 located between the two piston members, and the liquid passage pipeline connecting the brewing cavity 110; then, by operating at least one piston member to move closer to or away from the other piston member, the brewing residual liquid remaining in the brewing cavity 110 and / or the liquid passage pipeline can be centrally sucked into the brewing cavity 110, or centrally pushed to the outlet end of the liquid passage pipeline, which is conducive to the timely recovery of the brewing residual liquid, effectively preventing abnormalities such as deterioration, pollution and pipeline blockage caused by the long-term retention of the brewing residual liquid, and has the characteristics of simple operation.

[0195] Based on the above one or several embodiments, it can be understood that a more preferred solution of the present invention is to draw the brewing residual liquid into the brewing cylinder 100 by suction. Therefore, in one application, the method for cleaning the brewing residual liquid includes:

[0196] Step B2: two pistons 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 to disengage from the brewing cylinder 100 to the outside, so that the brewing residual liquid in the brewing cavity 110 can be discharged to the outside through the opening.

[0198] In this embodiment, the brewing residual liquid is sucked into the brewing cylinder 100 by suction, which can provide a simple, efficient and convenient method for cleaning the residual brewing liquid in the liquid passage pipe, so as to minimize the impact on the efficiency of the continuous cycle brewing operation (such as the beverage preparation operation). In particular, in the actual use process, in the interval between the preset brewing operations, the brewing residual liquid cleaning method can be used to empty the brewing residual liquid in the liquid passage pipe between the brewing cylinder 100 and the beverage outlet, so as to ensure the quality of each cup of beverage prepared by the subsequent brewing operation.

[0199] Specifically, the brewing cylinder 100 is generally cylindrical and has a brewing center axis X0. The brewing center axis X0 can be vertically arranged along the gravity direction (i.e., the up and down direction mentioned above), or horizontally arranged in a lateral direction perpendicular to the gravity direction, or inclined at any angle between the gravity direction and the lateral direction, and the technical effects of the present invention can be achieved.

[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 both the first piston member 210 and the second piston member 220 are disposed in the brewing cylinder 100, the first central axis X1, the second central axis X2 and the brewing central axis X0 overlap in a colinear manner. At least one of the first piston member 210 or the second piston member 220 can be disengaged from the brewing cylinder 100 to the outside of 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 brewing residual liquid outward from the opening.

[0201] Specifically, when the first piston member 210 moves downward in the brewing chamber 110 to the outside of the brewing chamber 110, the second center axis X2 and the brewing center axis X0 remain colinear and overlapped, and the first center axis X1 and the brewing center axis X0 deviate to a certain extent to make room for the second piston member 220 to move in the direction of the first piston member 210 in the brewing chamber 110, thereby driving the residual liquid in the brewing chamber 110 to be discharged.

[0202] It should be noted that, in the above-mentioned movement process of the first piston member 210 and the second piston member 220, it is not limited that the first piston member 210 and the second piston member 220 must move synchronously. For example, the step of the first central axis X1 and the brewing central axis X0 being deviated to a certain extent should be completed at least before the step of the second piston member 220 moving toward the first piston member 210 in the brewing chamber 110, so as to ensure that the first piston member 210 will not form interference obstacles during the whole 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 move directly along the first direction, so that the first central axis X1 and the brewing central axis X0 are collinear, but the first piston member 210 and the lower end opening of the brewing cylinder 100 are spaced apart along the first direction. Or the first piston member 210 and the brewing cylinder 100 can move in a transverse direction perpendicular to the first direction, so that the first central axis X1 and the brewing central axis X0 deviate in the transverse direction, and the first central axis X1 and the brewing central axis X0 are roughly parallel. Or the first piston member 210 and the brewing cylinder 100 can move in any direction inclined relative to the first direction and / or in the transverse direction, so that the first central axis X1 and the brewing central axis X0 deviate in an oblique direction, and the first central axis X1 and the brewing central axis X0 intersect to form an angle greater than 0° and less than 180°.

[0204] Then, when the second piston member 220 moves upward in the brewing chamber 110 to the outside of the brewing chamber 110, the first center axis X1 is collinear with the brewing center axis X0, and the second center axis X2 is collinear with or deviates from the brewing center axis X0, so as to make room for the first piston member 210 to move toward the second piston member 220 in the brewing chamber 110, thereby driving the residual liquid in the brewing chamber 110 to be discharged.

[0205] Similarly, in the process of movement of the first piston member 210 and the second piston member 220, it is not limited that the first piston member 210 and the second piston member 220 must move synchronously. For example, the second central axis X2 and the brewing central axis X0 can be selectively collinear or deviated, which should be completed at least before the first piston member 210 moves toward the second piston member 220 in the brewing chamber 110, so as to ensure that the second piston member 220 will not form interference obstacles 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 member 220 and the brewing cylinder 100. At this time, the second piston member 220 and the brewing cylinder 100 can move directly along the above-mentioned first direction, so that the second central axis X2 is collinear with the brewing central axis X0, but the second piston member 220 and the upper end opening of the brewing cylinder 100 are spaced apart along the first direction. Or the second piston member 220 and the brewing cylinder 100 can move in a lateral direction perpendicular to the above-mentioned first direction, so that the second central axis X2 deviates from the brewing central axis X0 in the lateral direction, and the second central axis X2 is roughly parallel to the brewing central axis X0. Or the second piston member 220 and the brewing cylinder 100 can move in any direction inclined relative to the above-mentioned first direction and / or in the lateral direction, so that the second central axis X2 deviates from the brewing central axis X0 in an oblique direction, and the second central axis X2 intersects with the brewing central axis X0 to form an angle greater than 0° and less than 180°.

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

[0208] Step S1: after confirming that brewing is completed, controlling at least one piston to separate outwardly from the brewing cylinder 100 along a first direction;

[0209] Step S2: controlling another piston to move along a first direction, and pushing the residue in the brewing cylinder 100 out of the brewing cylinder 100;

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

[0211] Step S4: Control the piston member detached from the brewing cylinder 100 to reciprocate in directions approaching and away from the opening;

[0212] Step S5: Control the two pistons to move into the brewing cylinder 100 and then move away in opposite directions;

[0213] The step S1 and the step S2 are executed in a loop at least once.

[0214] In a specific embodiment of the present invention, the first piston member 210 and the second piston member 220 are movably arranged in the brewing cylinder 100 along the brewing center axis X0. The second piston member 220 is located above the first piston member 210 in the first direction. The second piston member 220 can be separated from the brewing cylinder 100 upward to provide the first piston member 210 with an upper end opening for pushing the brewing residual liquid in the brewing cylinder 100 upward. When the beverage is brewed, the second piston member 220 moves upward along the brewing center axis X0 and opens the upper end opening of the brewing cylinder 100, and the first piston member 210 moves toward the second piston member 220 (above) to at least the edge of the brewing cylinder 100 and pushes the waste residue in the brewing cylinder 100 outward, and then the brewing cylinder 100 is rotated to scrape off the waste residue by an external baffle or in an active manner. After the waste residue is scraped off, the brewing cylinder 100 returns to its original position, and the second piston member 220 moves a distance K1 in the opposite direction into the brewing cylinder 100. The distance K1 must be satisfied when the second piston member 220 moves back into the brewing cylinder 100 and forms a sealing state for the inner diameter of the brewing cylinder 100. Then the first piston member 210 and the second piston member 220 coaxially move away from the travel distance K2 in the brewing cylinder 100 in opposite directions. 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 the first piston member 210 and the second piston member 220 both 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 downward to form a travel distance K2 and away from the second piston member 220.

[0215] In another specific embodiment of the present invention, the first piston member 210 and the second piston member 220 are movably arranged in the brewing cylinder 100 along the brewing center axis X0. The second piston member 220 is located above the first piston member 210 in the first direction. The first piston member 210 can move downward to be separated from the brewing cylinder 100, so as to provide the second piston member 220 with a lower end opening to push the brewing residual liquid in the brewing cylinder 100 downward. When the beverage is brewed, the first piston member 210 moves downward along the brewing center axis X0 and opens the lower end opening of the brewing cylinder 100, and the second piston member 220 moves toward the first piston member 210 (below) to at least the edge of the brewing cylinder 100 and pushes the waste residue in the brewing cylinder 100 outward, and then the brewing cylinder 100 is rotated to scrape off the waste residue by an external baffle or in an active manner. After the waste residue is scraped off, the brewing cylinder 100 returns to its original position, and the first piston member 210 moves a distance K1 in the opposite direction into the brewing cylinder 100. The distance K1 must be satisfied when the first piston member 210 moves back into the brewing cylinder 100 and forms a sealing state for the inner diameter of the brewing cylinder 100. Then the first piston member 210 and the second piston member 220 coaxially move away from the travel distance K2 in the brewing cylinder 100 in opposite directions. 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 the first piston member 210 and the second piston member 220 both move away from each other. Preferably, the first piston member 210 covers the lower end opening of the brewing cylinder 100 and is fixed, and the second piston member 220 moves upward to form a travel distance K2 and away from the first piston member 210.

[0216] In the above embodiment, the liquid pipeline includes a first pipeline and a second pipeline, wherein the first pipeline is a liquid outlet pipeline, that is, connected between the beverage outlet and the second piston member, the liquid outlet pipeline has a length of L and an inner diameter of r, and the interior of the brewing cylinder 100 is preferably a regular cylindrical shape with an inner diameter of R, wherein πr 2 L≤πR 2 K2. The minimum value of the K2 distance of the first piston member 210 and the second piston member 220 can be calculated to avoid a reduction in efficiency due to an excessively long stroke.

[0217] Preferably, when the first piston member 210 and the second piston member 220 move the stroke K2, the first pipeline is an open passage and the second pipeline is closed, so that the residual liquid in the first pipeline is sucked into the brewing cylinder 100. After the second piston member 220 is separated from the brewing cylinder 100 upward, the first piston member 210 moves upward to a position not lower than the upper surface of the brewing cylinder 100, and the waste liquid sucked into the brewing cylinder 100 is pushed out. Subsequently, optionally, the brewing cylinder 100 and the first piston member 210 move together, and the residual liquid is cleaned up by a baffle or an active method for cleaning waste residues.

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

[0219] When the liquid-passing pipeline includes a waste discharge pipeline connected to the first piston member 210 and a liquid outlet pipeline connected to the second piston member 220, as described above, the liquid outlet pipeline connects the brewing chamber 110 and the beverage outlet of the whole machine. 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. When the first piston member 210 and the second piston member 220 move away from each other and a negative pressure is formed in the brewing chamber 110, the residual liquid in the liquid outlet pipeline can be drawn back into the brewing chamber 110 from the liquid outlet pipeline.

[0220] Specifically, the second piston member 220 is located above the first piston member 210 in the brewing cylinder 100 in the vertical direction, 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 in at least one of the following ways:

[0221] The first piston 210 moves downwardly away from the brewing cylinder 100, forming 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 220 is separated from the brewing cylinder 100 upwards, forming an opening at the upper end of the brewing cylinder 100, and the first piston 210 pushes the residual liquid outwards from the opening at the upper end of the brewing cylinder 100 upwards; or,

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

[0224] In addition, when the brewing residual liquid is discharged from the waste pipe 310, one of the following methods can be selected:

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

[0226] A suction pump body is provided from the first piston member 210 to the waste discharge pipeline 310, wherein the passages from the waste discharge pipeline 310 to the liquid outlet pipeline are all connected.

[0227] The first piston member 210 and the waste pipe 310 are provided with valve bodies for connecting to the hot water boiler for brewing and can be selectively connected in pairs or completely disconnected and closed.

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

[0229] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0230] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory 450 (Read Only Memory, ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0231] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for cleaning brewing residual liquid, applied to brewing equipment, characterized in that: The brewing device comprises a brewing cylinder having a brewing cavity, two pistons disposed in the brewing cavity and capable of relatively moving, and a liquid passageway connected to the brewing cavity in an on-off manner; The cleaning method of the brewing residual liquid comprises: Controlling the two pistons to move into the brewing chamber; At least one of the pistons is controlled to move closer to or farther from another piston, so as to drive the residual brewing liquid to be discharged from the liquid passage.

2. The method for cleaning brewing residual liquid according to claim 1, characterized in that: In the step of controlling at least one of the pistons to move closer to or farther away from the other piston to drive the residual brewing liquid to be discharged from the liquid passage pipeline, the volume change caused by the movement of the piston is not less than the volume of the liquid passage pipeline.

3. The method for cleaning brewing residual liquid according to claim 1, characterized in that: The step of controlling at least one of the piston members to approach or move away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline comprises: At least one of the pistons is controlled to be close to another piston, so as to drive the brewing residual liquid to be pushed outward from the liquid passage.

4. The method for cleaning brewing residual liquid according to claim 1, characterized in that: The step of controlling at least one of the piston members to approach or move away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline comprises: Controlling at least one of the pistons to move away from the other piston, so as to drive the residual brewing liquid to be sucked from the liquid passage into the brewing chamber; The brewing residual liquid in the brewing chamber is separated from the liquid passing pipeline.

5. The method for cleaning brewing residual liquid according to any one of claims 1 to 4, characterized in that: The liquid passage pipeline is provided in plurality, and they are respectively a first pipeline and the remaining second pipelines; The step of controlling at least one of the piston members to approach or move away from another piston member to drive the residual brewing liquid to be discharged from the liquid passage pipeline comprises: Controlling the first pipeline to be connected to the brewing chamber and each of the second pipelines to be isolated from the brewing chamber; At least one of the pistons is controlled to move closer to or farther away from another piston, so as to drive the brewing residual liquid to be discharged from the first pipeline.

6. The method for cleaning brewing residual liquid according to claim 5, characterized in that: The first pipeline is a waste discharge pipeline.

7. The method for cleaning brewing residual liquid according to claim 5, characterized in that: One of the second pipelines is a water injection pipeline; After the step of controlling at least one of the pistons to move closer to or farther from the other piston to drive the residual brewing liquid to be discharged from the first pipeline, the method includes: Controlling the water injection pipeline to be connected to the brewing chamber, and injecting clean water into the brewing chamber; The brewing residual liquid in the brewing cavity is discharged outwardly.

8. The method for cleaning brewing residual liquid according to claim 7, characterized in that: Before the step of controlling the water injection pipeline to be connected to the brewing chamber and injecting clean water into the brewing chamber, the method further includes: The two pistons are controlled to be disposed in the brewing chamber and spaced apart by a preset distance.

9. The method for cleaning brewing residual liquid according to claim 7, characterized in that: The amount of clean water injected is not less than the volume of the current empty space of the brewing chamber.

10. The method for cleaning brewing residual liquid according to any one of claims 4 or 7 to 9, characterized in that: At least one of the two piston members can be disengaged from the brewing chamber to form an opening at the brewing cylinder; The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises: Controlling at least one of the pistons to disengage from the brewing chamber; The other piston member is controlled to move toward the opening so as to discharge the residual brewing liquid in the brewing cavity outward through the opening.

11. The method for cleaning brewing residual liquid according to any one of claims 4 or 7 to 9, characterized in that: The brewing cavity penetrates the brewing cylinder in the vertical direction, and the two piston members are respectively a first piston member and a second piston member arranged in sequence from bottom to top, and the first piston member can be detached from the brewing cavity to form an opening at the brewing cylinder; The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises: The first piston is controlled to move downward in the brewing chamber until it is disengaged from the brewing chamber.

12. The method for cleaning brewing residual liquid according to any one of claims 4 or 7 to 9, characterized in that: The brewing cavity penetrates the brewing cylinder in the vertical direction, and the two piston members are respectively a first piston member and a second piston member arranged in sequence from bottom to top, and the second piston member can be detached from the brewing cavity to form an opening at the brewing cylinder; The step of discharging the residual brewing liquid in the brewing cavity to the outside comprises: Controlling the second piston to move upward in the brewing chamber until it is disengaged from the brewing chamber; The first piston is controlled to move toward the opening so as to discharge the residual brewing liquid in the brewing cavity outward through the opening.

13. The method for cleaning brewing residual liquid according to claim 1, characterized in that: At least one of the two piston members can be disengaged from the brewing chamber to form an opening at the brewing cylinder; Before the step of controlling the two pistons to be arranged in the brewing chamber, the method further includes: Controlling at least one of the pistons to disengage from the brewing chamber; The other piston member is controlled to move toward the opening to discharge the residue in the brewing chamber outward through the opening.

14. The method for cleaning brewing residual liquid according to claim 13, characterized in that: In the step of controlling the other piston member to move toward the opening, the piston member moves to be flush with the opening.

15. The method for cleaning brewing residual liquid according to any one of claims 13 to 14, characterized in that: When the step of discharging the residue outwards and the step of discharging the brewing residual liquid outwards are performed, the movement orientations of the piston members are controlled to be the same and the discharging directions are the same.

16. A method for cleaning brewing residual liquid, applied to brewing equipment, characterized in that: The brewing device comprises a brewing cylinder with a brewing cavity, two pistons disposed in the brewing cylinder and movable relative to each other, and a liquid passageway connected to the pistons in an on-off manner, wherein at least one of the two pistons can be disengaged from the brewing cylinder to form an opening at the brewing cylinder; The cleaning method of the brewing residual liquid comprises: The two pistons are arranged in the brewing cylinder and moved away from each other in opposite directions to form a closed enlarged space in the brewing cylinder, and the enlarged space sucks the brewing residual liquid in the liquid passage into the brewing cylinder; At least one of the pistons is controlled to be disengaged from the brewing cylinder to allow the brewing residual liquid in the brewing cavity to be discharged outward through the opening.

17. The method for cleaning brewing residual liquid according to claim 16, characterized in that: There are multiple liquid-passing pipelines, including a first pipeline and the remaining second pipelines. The first pipeline is connected between one of the piston members and the beverage outlet of the brewing device, and at least one of the second pipelines is connected to another piston member. A valve body is provided at the connection between the two. When executing the steps of the method for cleaning the residual brewing liquid, the valve body is in a closed state.

18. The method for cleaning brewing residual liquid according to claim 16, characterized in that: The two pistons are respectively a first piston and a second piston, the brewing cylinder has a brewing center axis X0, and the first piston and the second piston have a first center axis X1 and a second center axis X2 respectively; When the first piston member and the second piston member are disposed in the brewing cylinder, the first center axis X1 , the second center axis X2 coincide with the brewing center axis X0 .

19. The method for cleaning brewing residual liquid according to claim 18, characterized in that: The first piston member can move in a direction away from the second piston member until it is outwardly separated from the brewing cylinder and forms the opening; During the movement, the second center axis X2 remains collinear with the brewing center axis X0, and the first center axis X1 deviates from the brewing center axis X0 to make room for the second piston member to move toward the first piston member in the brewing chamber, thereby driving the residual liquid in the brewing chamber to be discharged.

20. The method for cleaning brewing residual liquid according to claim 18, characterized in that: Before the second piston member moves in the brewing chamber toward the first piston member, the first center axis X1 deviates from the brewing center axis X0.

21. The method for cleaning brewing residual liquid according to claim 18, characterized in that: The second piston member can move in a direction away from the first piston member until it is outwardly separated from the brewing cylinder and forms the opening; The first center axis X1 is collinear with the brewing center axis X0, and the second center axis X2 is collinear with or deviates from the brewing center axis X0, so as to allow the first piston to move toward the second piston in the brewing chamber to drive the residual liquid in the brewing chamber to be discharged.

22. The method for cleaning brewing residual liquid according to claim 21, characterized in that: Before the first piston member moves in the brewing chamber toward the second piston member, the second center axis X2 can selectively deviate from the brewing center axis X0.

23. The method for cleaning brewing residual liquid according to claim 21, characterized in that: After the deviation, the second center axis X2 is parallel to or intersects with the brewing center axis X0 to form an angle.

24. A method for cleaning brewing residual liquid according to any one of claims 16 to 23, characterized in that: The two piston members move asynchronously when moving.

25. A method for cleaning brewing residual liquid, applied to brewing equipment, characterized in that: The brewing device comprises a brewing cylinder and at least one piston member detachably arranged in the brewing cylinder, wherein two piston members can be close to each other in the brewing cylinder to compress powder to brew beverage, and after at least one piston member is detached, the brewing cylinder is opened; The cleaning method of the brewing residual liquid comprises: S1: after confirming that brewing is completed, controlling at least one of the pistons to separate outwardly from the brewing cylinder along a first direction; S2: controlling the other piston to move along the first direction, and pushing the residue in the brewing cylinder out of the brewing cylinder; S3: controlling the piston in the brewing cylinder to reciprocate in a direction approaching and away from the opening; S4: controlling the piston member separated from the brewing cylinder to reciprocate in a direction close to and away from the opening; S5: controlling the two pistons to move into the brewing cylinder and then move away in opposite directions; The S1 and S2 are executed at least once in a loop.

26. The method for cleaning brewing residual liquid according to claim 25, characterized in that: The two pistons are respectively a first piston and a second piston, the brewing cylinder has a brewing center axis X0, and the first piston and the second piston have a first center axis X1 and a second center axis X2 respectively; When the two pistons are disposed in the brewing cylinder, the first center axis X1, the second center axis X2 and the brewing center axis X0 are collinear; At least after executing S2 and before executing S3, the first center axis X1 or the second center axis X2 corresponding to the piston member detached from the brewing cylinder is controlled to deviate from the brewing center axis X0.

27. The method for cleaning brewing residual liquid according to claim 26, characterized in that: After the deviation, the first center axis X1 or the second center axis X2 corresponding to the piston member separated from the brewing cylinder is parallel to or intersects with the brewing center axis X0 to form an angle.

28. A method for cleaning brewing residual liquid, applied to brewing equipment, characterized in that: The brewing device comprises a brewing cylinder having a brewing cavity, two pistons disposed in the brewing cavity and movable relative to each other, a liquid passageway connected to the brewing cavity and disconnectable, and an input module, wherein the input module is used to input an input value of a preset parameter; The cleaning method of the brewing residual liquid comprises: Controlling the two pistons to move into the brewing chamber; The input value input by the input module is obtained, and according to the input value, at least one of the piston members is controlled to translate closer to or farther from another piston member, so as to drive the brewing residual liquid in the liquid passage pipeline to be discharged from the liquid passage pipeline.

29. The method for cleaning brewing residual liquid according to claim 28, characterized in that: The preset parameters include specification parameters of the liquid passage pipeline and / or movement parameters of the two piston members.

30. A brewing device, characterized in that: include: The brewing module comprises a brewing cylinder having a brewing cavity, two pistons 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 pistons to move; as well as, A control device is electrically connected to the driving mechanism and the valve body, respectively, and the control device includes a memory, a processor, and a brewing residual liquid cleaning program stored in the memory and executable on the processor, wherein the brewing residual liquid cleaning program is configured to implement the steps of the brewing residual liquid cleaning method as described in any one of claims 1 to 29.

31. The brewing device according to claim 30, characterized in that The brewing device further comprises an input module, and the input module is used to input input values ​​of preset parameters.

32. A storage medium, characterized in that: The storage medium stores a brewing residual liquid cleaning program, and when the brewing residual liquid cleaning program is executed by the processor, the steps of the brewing residual liquid cleaning method according to any one of claims 1 to 29 are implemented.

33. A brewing device, characterized in that: include: A brewing cylinder is formed with a brewing cavity and two piston members arranged in the brewing cavity and capable of approaching or moving away from each other, wherein the two piston members include a first piston member and a second piston member; a liquid-passing pipeline, connected to the two piston members respectively and communicating for liquid to flow through, the liquid-passing pipeline comprising a waste discharge pipeline connected to the first piston member and a liquid outlet pipeline connected to the second piston member, the liquid outlet pipeline communicating the brewing chamber with a beverage outlet; Wherein, the first piston member and the second piston member are located in the brewing chamber and form a sealed space with the brewing cylinder, and the residual liquid in the liquid outlet pipeline can be drawn back into the brewing chamber from the liquid outlet pipeline when the first piston member and the second piston member move away from each other and form a negative pressure in the brewing chamber.

34. The brewing device according to claim 33, characterized in that The second piston member is located above the first piston member in the brewing cylinder along the vertical direction, and the residual liquid drawn into the brewing chamber accumulates above the first piston member.

35. The brewing device according to claim 34, characterized in that The residual liquid accumulated in the brewing chamber at the first piston member can be discharged in at least one of the following ways: The first piston member is disengaged downward from the brewing cylinder 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, The second piston member is disengaged from the brewing cylinder upwards to form an opening at the upper end of the brewing cylinder, and the first piston member pushes the residual liquid outwards from the opening at the upper end of the brewing cylinder upwards; or, The first piston component is communicated with the waste discharge pipeline, and the brewing residual liquid is discharged from the first piston component and the waste discharge pipeline.

36. The brewing device according to claim 35, characterized in that When the brewing residual liquid is discharged from the waste discharge pipeline, one of the following methods can be selected: The first piston member and the second piston member move toward each other, and a closable valve body is provided on the liquid outlet pipeline connected to the second piston member; or, A suction pump body is arranged from the first piston member to the waste discharge pipeline, wherein the passages from the waste discharge pipeline to the liquid outlet pipeline are all connected.

37. The brewing device according to claim 33, characterized in that The first piston member and the waste discharge pipeline are provided with valve bodies for connecting to the hot water boiler for brewing and can be selectively connected in pairs or completely disconnected and closed.

38. The brewing device according to claim 33, characterized in that The first piston member and the second piston member clamp the powder cake in the brewing cavity of the brewing cylinder for extraction, and the direction in which the residue cake after the powder cake is extracted is discharged from the brewing cavity is consistent with the discharge direction of the brewing residual liquid.

Images