Beverage machine and beverage machine control method

Abstract

The invention provides a beverage machine. The beverage machine comprises a liquid source; the outlet assembly is used for outputting drinks; the first boiler is connected between the liquid source and the outlet assembly, the first boiler is provided with a steam outlet, and the first boiler is used for generating steam; the second boiler is connected between the liquid source and the outlet assembly, the second boiler is provided with a liquid outlet, and the second boiler is used for supplying liquid to the first boiler; the first steam conveying pipeline is connected with the steam outlet and the liquid outlet; the input end of the second liquid discharge pipeline is connected to the second boiler, and the output end of the second liquid discharge pipeline is a fluid discharge outlet; steam generated by the first boiler can sequentially pass through the steam outlet, the first steam conveying pipeline and the liquid outlet to enter the second boiler, so that liquid in the second boiler is discharged through a fluid discharging outlet of the second liquid discharging pipeline. By arranging the first steam conveying pipeline and the second liquid discharging pipeline, liquid in the second boiler can be efficiently, conveniently and thoroughly discharged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of beverage preparation, and in particular to a beverage machine and a control method of the beverage machine. BACKGROUND

[0002] In a beverage machine for preparing beverages such as coffee, an internal or external liquid source can be used to provide water required for generating the beverage, and the beverage machine can be provided with a brewing unit to which the water is supplied, and in which the beverage is formed.

[0003] The beverage machine generally has a complex liquid system, and a boiler is generally arranged in the liquid system for outputting hot liquid and steam to prepare the beverage. When the beverage machine is transported, stored or cleaned, the liquid in the boiler often needs to be emptied. However, the current emptying operation is complex, low in efficiency, and liquid is easy to remain in the boiler. SUMMARY

[0004] An object of the present application is to provide a beverage machine and a control method of the beverage machine, which can efficiently and conveniently discharge the liquid in the second boiler and discharge the liquid completely.

[0005] To achieve the above object, the present application provides a beverage machine, comprising: a liquid source;

[0006] an outlet assembly for outputting the beverage;

[0007] a first boiler connected between the liquid source and the outlet assembly, the first boiler having a steam outlet, and the first boiler being configured to generate steam;

[0008] a second boiler connected between the liquid source and the outlet assembly, the second boiler having a liquid outlet, and the second boiler being configured to supply liquid to the first boiler;

[0009] a first steam delivery pipeline connecting the steam outlet and the liquid outlet;

[0010] a second liquid discharge pipeline, an input end of the second liquid discharge pipeline being connected to the second boiler, and an output end of the second liquid discharge pipeline being a fluid discharge outlet;

[0011] The steam generated by the first boiler can sequentially pass through the steam outlet, the first steam delivery pipeline and the liquid outlet into the second boiler, so that the liquid in the second boiler is discharged through the fluid discharge outlet of the second liquid discharge pipeline.

[0012] As a further improvement of an embodiment of the present application, a second discharge control valve is arranged between the input end of the second liquid discharge pipeline and the output end of the second liquid discharge pipeline.

[0013] As a further improvement of an embodiment of the present application, the beverage machine has a draining mode, and the beverage machine further comprises a controller configured to:

[0014] In the draining mode, the first steam delivery conduit is controlled to be closed and the second steam delivery conduit is controlled to be opened, so that the liquid in the second steam delivery conduit is drained from the outlet assembly by the steam in the first boiler.

[0015] As a further improvement of an embodiment of the present application, the beverage machine further comprises a first liquid draining conduit, an input end of the first liquid draining conduit is connected to the first boiler, an output end of the first liquid draining conduit is a fluid discharge outlet, and a first draining control valve is arranged between the input end of the first liquid draining conduit and the output end of the first liquid draining conduit.

[0016] As a further improvement of an embodiment of the present application, the liquid outlet is located at a top of the second boiler, and an input end of the second liquid draining conduit is connected to a bottom of the second boiler.

[0017] As a further improvement of an embodiment of the present application, the steam outlet is arranged at a top of the first boiler, and an input end of the first liquid draining conduit is connected to a bottom of the first boiler.

[0018] As a further improvement of an embodiment of the present application, the beverage machine further comprises a second steam delivery conduit, the second steam delivery conduit is connected to the steam outlet and the outlet assembly;

[0019] The beverage machine has a draining mode, and the beverage machine further comprises a controller configured to:

[0020] In the draining mode, the first steam delivery conduit is controlled to be closed and the second steam delivery conduit is controlled to be opened, so that the liquid in the second steam delivery conduit is drained from the outlet assembly by the steam in the first boiler.

[0021] As a further improvement of an embodiment of the present application, the first steam delivery conduit is connected with an output communication control valve, the output communication control valve comprises a first valve port, a second valve port and a third valve port; the first steam delivery conduit comprises a first steam delivery branch connecting the steam outlet and the first valve port, the first steam delivery conduit further comprises a communication conduit connecting the second valve port and the liquid outlet, and a liquid supply conduit is connected between the third valve port and a liquid inlet of the first boiler.

[0022] The steam generated by the first boiler can be supplied to the second boiler in sequence through the steam outlet, the first steam delivery branch, the output communication control valve, the communication conduit and the liquid outlet.

[0023] The liquid in the second boiler can be supplied to the first boiler in sequence through the liquid outlet, the communication pipeline, the output communication control valve, the liquid supply pipeline and the liquid inlet.

[0024] As a further improvement of the embodiment of the present application, the second steam delivery pipeline comprises a first steam discharge branch and a second steam discharge branch, and the beverage machine further comprises a brewing device; the first steam discharge branch connects the steam outlet and the outlet assembly, and the brewing device is arranged on the first steam discharge branch; the steam in the first boiler enters the first steam discharge branch through the steam outlet, so that the liquid in the first steam discharge branch is discharged from the outlet assembly.

[0025] The second steam discharge branch connects the steam outlet and the outlet assembly, and a milk source is arranged on the second steam discharge branch; the steam in the first boiler enters the second steam discharge branch through the steam outlet, so that the liquid in the second steam discharge branch is discharged from the outlet assembly.

[0026] As a further improvement of the embodiment of the present application, a first on-off control valve is arranged on the first steam delivery branch, and the inner diameter of the pipeline connecting the steam outlet and the first on-off control valve is greater than the inner diameter of the pipeline connecting the first on-off control valve and the first valve port.

[0027] As a further improvement of the embodiment of the present application, a first on-off control valve is arranged on the first steam delivery branch, and the length of the pipeline connecting the steam outlet and the first on-off control valve is greater than the length of the pipeline connecting the first on-off control valve and the first valve port.

[0028] As a further improvement of the embodiment of the present application, a first on-off control valve and a first one-way control valve are arranged on the first steam delivery branch, and the first one-way control valve is arranged downstream of the first on-off control valve; the first one-way control valve is used to allow the steam to be delivered from the first on-off control valve to the output communication control valve, and is used to prevent the liquid from being delivered from the output communication control valve to the first on-off control valve.

[0029] To achieve the above-mentioned purpose, the present application further provides a beverage machine control method, comprising the following steps:

[0030] receiving the emptying signal;

[0031] controlling the first steam delivery pipe to open and the second liquid discharge pipe to open, so as to deliver the steam generated in the first boiler into the second boiler through the first steam delivery pipe, and then discharge the liquid in the second boiler through the second liquid discharge pipe;

[0032] The first steam delivery pipe is connected with a steam outlet of the first boiler and a liquid outlet of the second boiler, and an input end of the second liquid discharge pipe is connected with the second boiler, and an output end of the second liquid discharge pipe is a fluid discharge outlet.

[0033] As a further improvement of the embodiment of the present application, after receiving the emptying signal, the method further comprises the following steps:

[0034] stopping supplying liquid to the second boiler.

[0035] As a further improvement of the embodiment of the present application, an input end of the second liquid discharge pipe is connected with a bottom of the second boiler, and a second discharge control valve is arranged between the input end of the second liquid discharge pipe and an output end of the second liquid discharge pipe.

[0036] As a further improvement of the embodiment of the present application, after receiving the emptying signal, the method further comprises:

[0037] controlling the water pump to work, so as to discharge the liquid in the pipe between the water pump and the liquid source into the pipe downstream of the water pump.

[0038] As a further improvement of the embodiment of the present application, after receiving the emptying signal, the method further comprises the following steps:

[0039] controlling the first steam delivery pipe to close, and controlling a second steam delivery pipe connected with the steam outlet and the outlet assembly to open, so as to supply the steam generated in the first boiler to the outlet assembly through the steam outlet and the second steam delivery pipe, and then discharge the liquid in the second steam delivery pipe and the outlet assembly.

[0040] As a further improvement of the embodiment of the present application, after controlling the second liquid discharge pipe to open for a preset time length, the control method further comprises:

[0041] stopping supplying liquid to the first boiler;

[0042] controlling the first steam delivery pipe to close, and controlling a first liquid discharge pipe to open, so as to discharge the liquid in the first boiler through the first liquid discharge pipe by the steam generated in the first boiler;

[0043] The input end of the first liquid discharge pipeline is connected to the first boiler, and the output end of the first liquid discharge pipeline is a fluid discharge outlet.

[0044] As a further improvement of one embodiment of the present invention, the input end of the first liquid discharge pipeline is connected to the bottom of the first boiler, and a first discharge control valve is provided between the input end of the first liquid discharge pipeline and the output end of the first liquid discharge pipeline.

[0045] As a further improvement of one embodiment of the present invention, a descaling step is further included, and the descaling step includes:

[0046] Receive descaling signal;

[0047] controlling the water pump to operate and controlling the liquid supply pipeline connecting the liquid inlet of the first boiler and the liquid outlet of the second boiler to open, so as to supply a cleaning solution from the liquid source to the second boiler and to supply the cleaning solution from the second boiler to the first boiler;

[0048] controlling the first boiler to heat up;

[0049] The first steam delivery pipeline is controlled to be opened, and the second liquid discharge pipeline is controlled to be opened, so that the steam in the first boiler is supplied to the second boiler through the first steam delivery pipeline, and the cleaning solution in the second boiler is discharged through the second liquid discharge pipeline, wherein the input end of the second liquid discharge pipeline is connected to the bottom of the second boiler.

[0050] As a further improvement of one embodiment of the present invention, after the second liquid discharge pipeline is opened for a preset time, the descaling step further includes:

[0051] controlling the first steam delivery pipeline to be closed and controlling the first liquid discharge pipeline to be opened, so as to discharge the cleaning solution in the first boiler through the first liquid discharge pipeline by the steam in the first boiler;

[0052] The input end of the first liquid discharge pipeline is connected to the bottom of the first boiler, and the output end of the first liquid discharge pipeline is a fluid discharge outlet.

[0053] The beverage machine and beverage machine control method provided by the embodiments of the present invention are characterized in that a first steam delivery pipeline is connected between the first boiler and the second boiler. The steam in the first boiler can be supplied to the second boiler for replenishing the first boiler through the first steam delivery pipeline. When the liquid in the second boiler needs to be discharged, the steam in the first boiler can be used to quickly and efficiently discharge the liquid in the second boiler, and the discharge is clean, thereby avoiding liquid residue in the second boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is a schematic diagram of a liquid path system of a beverage machine in an embodiment of the present application.

[0055] Figure 2 is a schematic diagram of a control method of a beverage machine in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The present application will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments do not limit the present application, and any changes in structure, method, or function made by those skilled in the art based on these embodiments are included in the scope of the present application.

[0057] It should be understood that the terms "first", "second", and "third" used herein can be used interchangeably to distinguish one component from another component, and these terms are not intended to represent the position or importance of the respective components. The terms "upstream" and "downstream" refer to the relative direction with respect to the flow of liquid in the liquid path. For example, "upstream" refers to the direction of the flow of liquid, and "downstream" refers to the direction of the flow of liquid.

[0058] The present application provides a beverage machine, which can be a coffee machine for making coffee, or a beverage machine for making other beverages. Referring to Figure 1 , an automatic coffee machine is taken as an example in an embodiment of the present application. The automatic coffee machine generally includes a liquid source 30 for providing coffee brewing water, a brewing device 38 for mixing and brewing water and coffee powder, a boiler for heating the supplied brewing water to form a coffee beverage through hot water extraction. The automatic coffee machine can also include a milk frother, which is provided with steam from the boiler, and the steam and milk are mixed to form hot milk, or the steam, air, and milk are mixed to form hot milk froth. The liquid flow path through which various beverages are extracted from the liquid source 30 to the user can be considered as a liquid path system 100 of the automatic coffee machine, which will be described in detail below.

[0059] Referring to Figure 1 , the liquid path system 100 includes the liquid source 30 and an outlet assembly 33. The outlet assembly 33 is used to output the beverage. The liquid path system 100 further includes the brewing device 38, which is connected between the liquid source 30 and the outlet assembly 33, and the beverage brewed through the brewing device 38 can be discharged from the outlet assembly 33.

[0060] The liquid source 30 can be a liquid supply tank which is detachably connected to the beverage machine body. The user can add liquid to the liquid supply tank by himself or automatically add liquid to the liquid supply tank by connecting an external water purifier. Of course, the liquid source 30 can be directly provided as an external water purifier, i.e., without providing a liquid supply tank in the beverage machine body, thereby reducing the size and cost of the beverage machine.

[0061] In an embodiment of the present application, the liquid source 30 can provide different liquids. The liquid source 30 includes a first liquid source 31, which can be an external water purifier for supplying water, and the beverage machine can use the water supplied by the first liquid source 31 to make beverages. The liquid source 30 further includes a second liquid source 32, which can be a liquid supply tank, and the liquid supply tank can be filled with cleaning solution. When the user needs to clean the liquid path system 100 of the beverage machine, the cleaning solution can be supplied by the second liquid source 32.

[0062] The liquid path system 100 further includes a first boiler 10. The first boiler 10 is connected between the liquid source 30 and the outlet assembly 33, and the first boiler 10 is used to generate steam. The first boiler 10 has a steam outlet through which steam in the first boiler 10 can be output.

[0063] In an embodiment of the present application, the first boiler 10 further has a liquid level sensor for detecting a liquid level signal in the first boiler 10. In this embodiment, the liquid level sensor is a liquid level probe. When the working parameters of the liquid level probe meet the liquid supplementing condition, the second boiler 20 can supply liquid to the first boiler 10.

[0064] Continuing to refer to Figure 1 The liquid path system 100 further includes a second boiler 20, which is also connected between the liquid source 30 and the outlet assembly 33. The second boiler 20 has a liquid outlet. The second boiler 20 is used to supply liquid to the first boiler 10. Specifically, the second boiler 20 can be used to output hot water, such as supplying hot water to the first boiler 10 or supplying hot water to the brewing device 38.

[0065] The liquid path system 100 further includes a water pump. The water pump can include a first water pump 35 and a second water pump 36. The first water pump 35 is connected between the liquid source 30 and the first boiler 10, and the first water pump 35 is also connected between the liquid source 30 and the second boiler 20. The first water pump 35 can be started to directly supply liquid from the liquid source 30 to the first boiler 10 or to the second boiler 20.

[0066] The second water pump 36 is connected between the liquid source 30 and the second boiler 20, and the second water pump 36 can also be started to supply liquid from the liquid source 30 to the second boiler 20.

[0067] The liquid supply pipeline 110 is connected between the liquid inlet of the first boiler 10 and the liquid outlet of the second boiler 20, and the second water pump 36 or the first water pump 35 can be started to supply the liquid in the second boiler 20 to the first boiler 10 through the liquid supply pipeline 110. Specifically, the liquid in the second boiler 20 can enter the first boiler 10 through the liquid outlet of the second boiler 20, the liquid supply pipeline 110 and the liquid inlet of the first boiler 10 in sequence. Of course, only one water pump can be arranged to supply liquid to the first boiler 10 and the second boiler 20 at the same time to save cost.

[0068] In the embodiments provided in the present application, the liquid path system 100 further comprises a first steam conveying pipeline 120, and the first steam conveying pipeline 120 is connected between the steam outlet of the first boiler 10 and the liquid outlet of the second boiler 20. The steam in the first boiler 10 can be supplied to the second boiler 20 through the first steam conveying pipeline 120. Specifically, the steam in the first boiler 10 can enter the second boiler 20 through the steam outlet of the first boiler 10, the first steam conveying pipeline 120 and the liquid outlet of the second boiler 20 in sequence.

[0069] The liquid path system 100 further comprises a second liquid discharge pipeline 21. The input end of the second liquid discharge pipeline 21 is connected to the second boiler 20, and the output end of the second liquid discharge pipeline 21 is a fluid discharge outlet.

[0070] The steam generated in the first boiler 10 can enter the second boiler 20 through the steam outlet of the first boiler 10, the first steam conveying pipeline 120 and the liquid outlet of the second boiler 20 in sequence, so that the liquid in the second boiler 20 is discharged through the output end of the second liquid discharge pipeline 21 under the extrusion of the steam.

[0071] In the embodiments, when it is necessary to empty the liquid in the second boiler 20, the first boiler 10 can be heated to generate steam in the first boiler 10. At the same time, the first steam conveying pipeline 120 and the second liquid discharge pipeline 21 can be opened, so that the steam in the first boiler 10 enters the second boiler 20 through the first steam conveying pipeline 120, the pressure in the second boiler 20 is increased, and the liquid in the second boiler 20 can be completely discharged from the second liquid discharge pipeline 21 under the extrusion of the steam, so that the liquid is not left in the second boiler 20, the discharge is clean and the discharge process is rapid.

[0072] The beverage machine can further have a liquid receiving tray 37, the output end of the second liquid discharge pipeline 21 is communicated with the liquid receiving tray 37, and the liquid in the second boiler 20 can be discharged into the liquid receiving tray 37 through the second liquid discharge pipeline 21. Specifically, the liquid in the second boiler 20 can be sequentially discharged into the liquid receiving tray 37 through the input end of the second liquid discharge pipeline 21 and the output end of the second liquid discharge pipeline 21. The liquid receiving tray 37 can be taken out of the beverage machine, so that the user can conveniently clean the liquid receiving tray 37.

[0073] In an embodiment of the present application, the second discharge control valve 22 is arranged between the input end and the output end of the second liquid discharge pipeline 21. By opening the second discharge control valve 22, the second liquid discharge pipeline 21 can be opened, and the liquid in the second boiler 20 can be discharged. Specifically, the liquid in the second boiler 20 can be sequentially discharged into the liquid receiving tray 37 through the input end of the second liquid discharge pipeline 21, the second discharge control valve 22 and the output end of the second liquid discharge pipeline 21. Closing the second discharge control valve 22 can prevent the liquid in the second boiler 20 from being discharged through the second liquid discharge pipeline 21.

[0074] Further, in an embodiment of the present application, the beverage machine comprises a draining mode. The user can select the draining mode through the control panel of the beverage machine. In the draining mode, the beverage machine can automatically drain the liquid in the liquid circuit system 100, thereby facilitating the transportation of the beverage machine and preventing the liquid in the liquid circuit system 100 from expanding and contracting during transportation to damage the liquid circuit system 100.

[0075] The beverage machine can be provided with a controller. The controller can be in communication connection with the second discharge control valve 21. The controller is used to: in the draining mode, control the first steam delivery pipeline 120 and the second discharge control valve 22 to be opened, so as to discharge the liquid in the second boiler 20 through the steam in the first boiler 10.

[0076] Specifically, the first steam delivery pipeline 120 is opened, i.e. the first boiler 10 and the second boiler 20 are communicated; and the second discharge control valve 22 is opened, i.e. the second boiler 20 and the fluid discharge outlet are communicated.

[0077] When the user selects the draining mode, the controller receives a draining signal, the controller can control the first boiler 10 to generate steam, stop supplying liquid to the second boiler 20, open the first steam delivery pipeline 120 to deliver steam into the second boiler 20, and open the second discharge control valve 21. After the steam generated by the first boiler 10 enters the second boiler 20 through the first steam delivery pipeline 120, the liquid in the second boiler 20 is discharged.

[0078] Of course, if the first boiler 10 contains a certain amount of steam when the emptying signal is received, the controller can not control the heating of the first boiler 10, but directly open the first steam delivery pipeline 120 to supply the steam in the first boiler 10 into the second boiler 20.

[0079] In this way, the pressure in the second boiler 20 can be increased by supplying the steam in the first boiler 10 into the second boiler 20, the liquid in the second boiler 20 can be quickly and completely drained, and the liquid in the second boiler 20 will not be left in the second boiler 20, and the draining is clean and efficient.

[0080] When the liquid in the second boiler 20 is drained through the second liquid draining pipeline 21, the dirt in the second boiler 20 can be simultaneously drained through the second liquid draining pipeline 21, and the dirt in the second boiler 20 will not flow through the downstream pipeline between the second boiler 20 and the outlet assembly 33, and will not cause the obstruction of the downstream pipeline or the damage of the components arranged in the downstream pipeline, such as the damage of the control valve of the downstream pipeline.

[0081] In an embodiment of the present application, the beverage machine further comprises a descaling mode, and the user can select the descaling mode through the control panel of the beverage machine. The controller is further configured to: in the descaling mode, control the first water pump 35 or the second water pump 36 to work to supply the cleaning solution into the second boiler 20 from the second liquid source 32; control the liquid supply pipeline 110 to open to supply the cleaning solution from the second boiler 20 to the first boiler 10; control the first boiler 10 to heat to generate steam; control the first steam delivery pipeline 120 to open to supply the steam to the second boiler 20, and control the second liquid draining pipeline 21 to open.

[0082] In the embodiment, in the cleaning mode, the first boiler 10 and the second boiler 20 are cleaned by supplying the cleaning solution into the first boiler 10 and the second boiler 20, reacting the cleaning solution with the scale in the first boiler 10 and the second boiler 20, and then draining the cleaning solution with the scale in the first boiler 10 and the second boiler 20.

[0083] In the embodiment, the same as the emptying mode, the cleaning solution in the second boiler 20 can be quickly and completely drained by the steam in the first boiler 10, and the impurities and dirt in the second boiler 20 can be simultaneously drained, and the obstruction of the downstream pipeline between the second boiler 20 and the outlet assembly 33 or the damage of the components arranged in the downstream pipeline, such as the damage of the control valve of the downstream pipeline, will not be caused.

[0084] Preferably, the liquid outlet of the second boiler 20 is located at the top of the second boiler 20, and the input end of the second liquid draining pipeline 21 is connected to the bottom of the second boiler 20, and specifically, the input end of the second liquid draining pipeline 21 is in liquid communication with the second boiler 20 at the bottom of the second boiler 20.

[0085] When the liquid in the second boiler 20 is discharged by using the steam in the first boiler 10, the steam in the first boiler 10 is directly supplied to the liquid surface in the second boiler 20 through the first steam delivery pipeline 120, i.e. pressure is applied from above the liquid surface in the second boiler 20, the bottom liquid is discharged, the liquid discharge speed in the second boiler 20 is increased, the possibility of residual liquid in the second boiler 20 is reduced, and complete discharge of the liquid in the second boiler 20 is achieved.

[0086] In addition, the input end of the second liquid discharge pipeline 21 is connected to the bottom of the second boiler 20, and when the liquid in the second boiler 20 is discharged, the dirt deposited at the bottom of the second boiler 20 can be discharged together, and the dirt removal effect is good. The dirt is directly discharged through the second liquid discharge pipeline 21, and does not need to pass through the downstream pipeline between the second boiler 20 and the outlet assembly 33, so as not to cause blockage or damage to the control valve arranged in the downstream pipeline.

[0087] Further, in an embodiment of the present application, the liquid pipeline system 100 further comprises a first liquid discharge pipeline 11. The input end of the first liquid discharge pipeline 11 is connected to the first boiler 10, the output end of the first liquid discharge pipeline 11 is a fluid discharge outlet, and the first discharge control valve 15 is connected between the input end of the first liquid discharge pipeline 11 and the output end of the first liquid discharge pipeline 11.

[0088] Specifically, the input end of the first liquid discharge pipeline 11 is in liquid communication with the bottom of the first boiler 10; the output end of the first liquid discharge pipeline 11 is connected to the liquid receiving disc 37, and the liquid in the first boiler 10 can be discharged to the liquid receiving disc 37 through the first liquid discharge pipeline 11. Specifically, the liquid in the first boiler 10 can be sequentially discharged to the liquid receiving disc 37 through the input end of the first liquid discharge pipeline 11, the first discharge control valve 15 and the output end of the first liquid discharge pipeline 11. Closing the first discharge control valve 15 can prevent the liquid in the first boiler 10 from being discharged through the first liquid discharge pipeline 11.

[0089] In this embodiment, when it is necessary to discharge the liquid in the first boiler 10, the first discharge control valve 15 can be opened so that the liquid in the first boiler 10 is discharged from the first liquid discharge pipeline 11. The liquid in the first boiler 10 can also be discharged into the liquid receiving disc 37 for the user to clean.

[0090] In the embodiment, the controller is further configured to, in the emptying mode, control the first liquid discharge pipeline 11 to be opened after the first steam delivery pipeline 120 is closed, so that the liquid in the first boiler 10 is discharged through the first liquid discharge pipeline 11 by the steam in the first boiler 10.

[0091] The controller is further configured to, in the descaling mode, control the first liquid discharge pipeline 11 to be opened after the first steam delivery pipeline 120 is closed, so that the cleaning solution in the first boiler 10 is discharged through the first liquid discharge pipeline 11 by the steam in the first boiler 10.

[0092] When the user selects the emptying mode or the descaling mode, the first steam delivery pipeline 120 and the second liquid discharge pipeline 21 need to be opened first, and after the liquid in the second boiler 20 is emptied, the first steam delivery pipeline 120 is closed. For example, when the first steam delivery pipeline 120 or the second discharge control valve 22 is opened for a first preset time, it is determined that the liquid in the second boiler 20 is emptied, the first steam delivery pipeline 120 is closed, and then the first liquid discharge pipeline 11 is opened, and the remaining steam in the first boiler 10 is used to empty the liquid in the first boiler 10.

[0093] Specifically, in the emptying mode or the descaling mode, the steam generated in the first boiler 10 is used to empty the second boiler 20 first, and then the first boiler 10.

[0094] Since the internal pressure of the first boiler 10 continuously increases during the generation of steam, opening the first discharge control valve 15 can quickly empty the liquid in the first boiler 10 under the action of pressure, avoid liquid residue, and achieve efficient and complete emptying.

[0095] In addition, during the process of discharging the liquid in the first boiler 10 through the first liquid discharge pipeline 11, the dirt and impurities carried out will not flow through the downstream pipeline between the first boiler 10 and the outlet assembly 33, and will not cause the blockage of the downstream pipeline between the first boiler 10 and the outlet assembly 33 or the damage of the components arranged in the downstream pipeline, such as the damage of the control valve in the downstream pipeline. Preferably, the steam outlet of the first boiler 10 is arranged at the top of the first boiler 10, and the input end of the first liquid discharge pipeline 11 is arranged at the bottom of the first boiler 10, that is, the pressure is applied from above the liquid surface in the first boiler 10, and the liquid is discharged from the bottom, which has good liquid emptying effect and can carry out as much dirt and impurities deposited at the bottom of the first boiler 10 as possible.

[0096] Further, in an embodiment of the present application, the liquid circuit system 100 further comprises a second steam delivery pipe 130. The second steam delivery pipe 130 is connected to the steam outlet of the first boiler 10 and the outlet assembly 33.

[0097] In the present embodiment, the first boiler 10 can be provided with two steam outlets, which are connected to the first steam delivery pipe 120 and the second steam delivery pipe 130, respectively.

[0098] In the present embodiment, the second steam delivery pipe 130 is opened, and the steam in the first boiler 10 can enter the inside of the second steam delivery pipe 130.

[0099] In the present embodiment, the controller is further configured to, in the emptying mode, control the first steam delivery pipe 120 to be closed and control the second steam delivery pipe 130 to be opened, so that the liquid in the second steam delivery pipe 130 is discharged from the outlet assembly 33 by the steam in the first boiler 10.

[0100] That is, the liquid in the second steam delivery pipe 130 can be emptied by the steam in the first boiler 10, and the liquid residue in the second steam delivery pipe 130 is reduced, so that the transportation of the beverage machine is facilitated, and the liquid in the liquid circuit system 100 is prevented from being damaged due to thermal expansion and contraction during transportation.

[0101] Further, in an embodiment of the present application, the second steam delivery pipe 130 comprises a first steam discharge branch 131 and a second steam discharge branch 132. The beverage machine further comprises a brewing device 38, the first steam discharge branch 131 is connected to the steam outlet of the first boiler 10 and the outlet assembly 33, and the brewing device 38 is arranged on the first steam discharge branch 131, so that the steam in the first boiler 10 enters the first steam discharge branch 131 through the steam outlet, and the liquid in the first steam discharge branch 131 is discharged from the outlet assembly 33.

[0102] The second steam discharge branch 132 is connected to the steam outlet of the first boiler 10 and the outlet assembly 33, and the milk source 34 is arranged on the second steam discharge branch 132, so that the steam in the first boiler 10 enters the second steam discharge branch 132 through the steam outlet, and the liquid in the second steam discharge branch 132 is discharged from the outlet assembly 33.

[0103] In the present embodiment, the first steam discharge branch 131 comprises a pipe connecting the steam outlet of the first boiler 10 and the first multi-way control valve 50 and a pipe connecting the first multi-way control valve 50 and the outlet assembly 33, wherein the first multi-way control valve 50 is described below. The liquid in the pipe connecting the steam outlet of the first boiler 10 and the first multi-way control valve 50 can be emptied by the steam in the first boiler 10, and the liquid in the pipe connecting the first multi-way control valve 50 and the outlet assembly 33 can also be emptied by the steam in the first boiler 10.

[0104] The second steam discharge branch 132 includes a pipe connecting the steam outlet of the first boiler 10 and the milk source 34, and a milk supply pipe connecting the milk source 34 and the outlet assembly 33. The milk source 34 can be arranged in the refrigerator module. The liquid in the pipe connecting the steam outlet of the first boiler 10 and the milk source 34 can be emptied by the steam in the first boiler 10, and the liquid in the milk supply pipe can be emptied.

[0105] For example, when the user selects the emptying mode, the connection between the liquid source 30 and the water pump can be disconnected first, and the liquid supply is stopped. If the liquid source 30 is a liquid supply tank, the liquid supply tank can be emptied first. If the liquid source 30 is an external tap water source, the pipe can be directly disconnected, or the control valve can be closed to stop the liquid supply. Then, the water pump is started, and the liquid in the pipe connected between the water pump and the liquid source 30 is emptied by self-suction of the water pump. Specifically, under the condition that the liquid source 30 stops supplying liquid, the water pump is controlled to work to discharge the liquid in the pipe between the water pump and the liquid source 30 to the pipe downstream of the water pump. Then, the first boiler 10 is heated to generate steam in the first boiler 10, the first steam delivery pipe 120 is closed, the second steam delivery pipe 130 is opened, and the liquid in the second steam delivery pipe 130 is emptied by the steam in the first boiler 10. Then, the second steam delivery pipe 130 is closed, the first steam delivery pipe 120 and the second discharge control valve 22 are opened, and the liquid in the second boiler 20 is continuously emptied by the steam in the first boiler 10. When the liquid in the second boiler 20 is emptied, the first steam delivery pipe 120 is closed, the first discharge control valve 15 is opened, and the liquid in the first boiler 10 is continuously emptied by the steam in the first boiler 10. Specifically, when the liquid in the second steam delivery pipe 130 is emptied, the first steam discharge branch 131 and the second steam discharge branch 132 can be opened in sequence.

[0106] The entire emptying process is automatically completed without user intervention, which is efficient and has good emptying effect.

[0107] Further, in an embodiment of the present application, an output communication control valve 40 is connected to the first steam delivery pipe 120. The output communication control valve 40 includes a first valve port 41, a second valve port 42, and a third valve port 43. The first steam delivery pipe 120 includes a first steam delivery branch 121 connecting the steam outlet of the first boiler 10 and the first valve port 41. The first steam delivery pipe 120 further includes a communication pipe 122 connecting the second valve port 42 and the liquid outlet of the second boiler 20. The liquid supply pipe 110 is connected between the third valve port 43 and the liquid inlet of the first boiler 10.

[0108] The steam generated in the first boiler 10 can be supplied to the second boiler 20 in sequence through the steam outlet, the first steam delivery branch 121, the output communication control valve 40, the communication pipeline 122, and the liquid outlet of the second boiler 20, thereby facilitating the complete discharge of the liquid in the second boiler 20 from the second liquid discharge pipeline 21. The liquid in the second boiler 20 can be supplied to the first boiler 10 in sequence through the liquid outlet, the communication pipeline 122, the output communication control valve 40, the liquid supply pipeline 110, and the liquid inlet of the first boiler 10, thereby enabling the second boiler 20 to replenish the first boiler 10 with liquid. In summary, the communication pipeline 122 can be used to both deliver steam from the output communication control valve 40 to the second boiler 20 and supply liquid from the second boiler 20 to the output communication control valve 40. The communication pipeline 122 has a high degree of functional integration, which can reduce the number of pipelines and simplify the overall pipeline configuration.

[0109] In this embodiment, a first on-off control valve 123 is provided on the first steam delivery branch 121. The first on-off control valve 123 may be a solenoid control valve. The output communication control valve 40 can selectively open or close any valve port. When it is necessary to supply steam from the first boiler 10 to the second boiler 20, such as when an emptying signal is received, the first boiler 10 is heated, the first on-off control valve 123 is opened, and the first valve port 41 and the second valve port 42 of the output communication control valve 40 are opened. The first steam delivery branch 121 is connected to the communication pipe 122 to form the first steam delivery pipe 120. The steam from the first boiler 10 is supplied to the second boiler 20 through the first steam delivery pipe 120, thereby facilitating the emptying of liquid from the second boiler 20.

[0110] When it is necessary to replenish liquid to the first boiler 10 through the second boiler 20, the second water pump 36 located between the second boiler 20 and the liquid source 30 can be started, and the second valve port 42 and the third valve port 43 of the output communication control valve 40 can be opened at the same time, so that the connecting pipe 122 is connected to the liquid supply pipe 110. The liquid in the second boiler 20 can be supplied to the first boiler 10 through the connecting pipe 122 and the liquid supply pipe 110.

[0111] Furthermore, in one embodiment of the present invention, the liquid circuit system 100 further includes a cold liquid supply line 140, and the output communication control valve 40 further includes a fourth valve port 44. The cold liquid supply line 140 connects the liquid source 30 and the fourth valve port 44. The cold liquid supply line 140 is further connected to the first water pump 35 located between the liquid source 30 and the fourth valve port 44.

[0112] The liquid supply line 110 is further connected with a first multi-way control valve 50, which comprises a first inlet 51, a first outlet 53 and a second outlet 54. The first inlet 51 is connected with the third valve port 43, the first outlet 53 is connected with one of the outlet assembly 33 and the brewing device 38, and the second outlet 54 is connected with the liquid inlet of the first boiler 10 to form a part of the liquid supply line 110.

[0113] In the present embodiment, the output communication control valve 40 can be a mixing valve. The first water pump 35 is activated to supply cold water to the output communication control valve 40 through the cold liquid supply line 140, and the first on-off control valve 123 is opened to supply steam to the output communication control valve 40 through the first steam delivery branch 121. The steam and the cold water are mixed to form hot water.

[0114] The output communication control valve 40 can selectively deliver liquid from the second boiler 20 to the first multi-way control valve 50, or deliver hot water formed by mixing cold water from the cold liquid supply line 140 and steam from the first boiler 10 to the first multi-way control valve 50, or deliver cold water from the cold liquid supply line 140 to the first multi-way control valve 50. The first multi-way control valve 50 is used to selectively deliver liquid to one of the outlet assembly 33 and the brewing device 38 through the first outlet 53, or deliver liquid to the second boiler 20 through the second outlet 54.

[0115] It can be understood that, through the output communication control valve 40 and the first multi-way control valve 50, liquid can be selectively supplied from the second boiler 20 to the first boiler 10, or directly supplied to the first boiler 10 through the cold liquid supply line 140, or supplied to one of the outlet assembly 33 and the brewing device 38 through the output communication control valve 40.

[0116] Specifically, the first water pump 35 is activated, the fourth valve port 44 and the third valve port 43 of the output communication control valve 40 are opened, and the first inlet 51 and the second outlet 54 of the first multi-way control valve 50 are opened, so that liquid can be directly supplied to the first boiler 10 through the cold liquid supply line 140.

[0117] The first water pump 35 or the second water pump 36 is activated, the second valve port 42 and the third valve port 43 of the output communication control valve 40 are opened, and the first inlet 51 and the second outlet 54 of the first multi-way control valve 50 are opened, so that liquid in the second boiler 20 can be supplied to the first boiler 10.

[0118] The first water pump 35 is started, the first on-off control valve 123 of the first steam delivery branch 121 is opened, and the first valve port 41, the fourth valve port 44, the third valve port 43 of the output communication control valve 40 and the first inlet 51 and the first outlet 53 of the first multi-way control valve 50 are opened, so that the cold water of the liquid source 30 and the steam in the first boiler 10 are mixed in the output communication control valve 40 to form hot water, and the formed hot water is supplied to one of the outlet assembly 33 and the brewing device 38.

[0119] The liquid outlet of the second boiler 20 is connected with a communication end 23 and a hot water output end 24, and the communication end 23 is connected with the second valve port 42 of the output communication control valve 40 through a communication pipeline 122. The hot water output end 24 is connected with the other one of the outlet assembly 33 and the brewing device 38 through a hot water delivery pipeline, so that the hot water of the second boiler 20 can be directly supplied to the other one of the outlet assembly 33 and the brewing device 38 through the hot water delivery pipeline. In this way, the liquid circuit system 100 has two hot water supply pipelines, and the working efficiency of the beverage machine can be improved.

[0120] For example, when making American coffee, the hot water output end 24 is connected with the brewing device 38 through the hot water delivery pipeline to supply hot water to the brewing device to realize high-temperature and high-pressure extraction of coffee, and at the same time, the cold water of the liquid source 30 and the steam in the first boiler 10 are mixed in the output communication control valve 40 to form hot water, and the formed hot water is supplied to the outlet assembly 33, so that the American coffee can be efficiently made.

[0121] In the embodiment, the first steam delivery branch 121 can be used to supply steam to the second boiler 20 and to mix the cold water supplied by the cold liquid supply pipeline 140 to form hot water to be supplied to the brewing device 38 or the outlet assembly 33, so that the pipeline arrangement is simplified.

[0122] Further, in an embodiment of the present application, the inner diameter of the pipeline connecting the steam outlet of the first boiler 10 and the first on-off control valve 123 is greater than the inner diameter of the pipeline connecting the first on-off control valve 123 and the first valve port 41. In this way, more steam in the first boiler 10 can be delivered to the output communication control valve 40 through the first steam delivery branch 121, the loss of steam heat can be reduced, the temperature of the steam can be ensured, and the temperature of the hot water obtained by heating the cold water can be ensured when the cold water needs to be heated.

[0123] Further, in an embodiment of the present application, the length of the pipeline connecting the steam outlet of the first boiler 10 and the first on-off control valve 123 is greater than the length of the pipeline connecting the first on-off control valve 123 and the first valve port 41.

[0124] In the embodiment, the first on-off control valve 123 is arranged closer to the output communication control valve 40 relative to the first boiler 10, which can reduce the steam heat loss in the first steam delivery branch 121, ensure the steam heat, and further ensure the temperature of the hot water obtained by heating the cold water with the steam.

[0125] Further, in the embodiment, the first steam delivery branch 121 is further provided with a first one-way control valve 124, which is arranged downstream of the first on-off control valve 123. The first one-way control valve 124 allows the steam to be delivered from the first on-off control valve 123 to the output communication control valve 40, and is used to prevent the liquid from being delivered from the output communication control valve 40 to the first on-off control valve 123. In this way, the pressure downstream of the output communication control valve 40, such as the pressure in the second boiler 20, can be prevented from entering the first steam delivery branch 121 in the reverse direction, so as to prevent the first on-off control valve 123 from being opened under the action of the pressure.

[0126] The second steam delivery pipeline 130 can be connected with a second multi-way control valve 60, and the multiple outlets of the second multi-way control valve 60 can be respectively connected with the first steam discharge branch 131 and the second steam discharge branch 132. One outlet of the second multi-way control valve 60 can also be connected with a milk frother.

[0127] The present application also provides a beverage machine control method. The beverage machine controller of any of the above embodiments can be used to execute any of the following beverage machine control methods.

[0128] Referring to Figure 2 In the embodiment, the beverage machine control method comprises:

[0129] receiving an emptying signal;

[0130] controlling the first steam delivery pipeline 120 to be opened, and controlling the second liquid discharge pipeline 21 to be opened, so as to deliver the steam generated in the first boiler 10 to the second boiler 20 through the first steam delivery pipeline 120, and further discharge the liquid in the second boiler 20 through the second liquid discharge pipeline 21.

[0131] In the embodiment, the first steam delivery pipeline 120 connects the steam outlet of the first boiler 10 and the liquid outlet of the second boiler 20, the input end of the second liquid discharge pipeline 21 is connected to the second boiler 20, and the output end of the second liquid discharge pipeline 21 is a fluid discharge outlet.

[0132] The user can select the emptying mode through the control panel of the beverage machine to send an emptying signal. After receiving the emptying signal, the first boiler 10 can be heated to generate steam in the first boiler 10. If there is already a certain amount of steam in the first boiler 10 when the emptying signal is received, the first boiler 10 can not be heated again, and the steam in the first boiler 10 can be directly used to promote the emptying of the liquid in the second boiler 20.

[0133] In the embodiment, the steam in the first boiler 10 is delivered to the second boiler 20 through the first steam delivery pipeline 120, which can increase the pressure in the second boiler 10 and promote the rapid and complete emptying of the liquid in the second boiler 20 through the second liquid discharge pipeline 21.

[0134] Further, in an embodiment of the present application, the beverage machine control method further comprises the following steps after receiving the emptying signal:

[0135] stopping the supply of liquid to the second boiler 20.

[0136] In the embodiment, after receiving the emptying signal, the pipeline between the liquid source 30 and the second boiler 20 can be closed to stop the supply of liquid to the second boiler 20, thereby avoiding the automatic supply of liquid to the second boiler 20 during the process of discharging the liquid in the second boiler 20 through the second liquid discharge pipeline 21, wasting water resources, and affecting the emptying efficiency.

[0137] Further, in an embodiment of the present application, the beverage machine control method, after receiving the emptying signal, further comprises the following steps:

[0138] controlling the first steam delivery pipeline 120 to be closed and controlling the second steam delivery pipeline 130 connecting the steam outlet of the first boiler 10 and the outlet assembly 33 to be opened, so that the steam generated in the first boiler 10 is supplied to the outlet assembly 33 through the steam outlet and the second steam delivery pipeline 130, and then the liquid in the second steam delivery pipeline 130 and the outlet assembly 33 is discharged.

[0139] In the embodiment, the second steam delivery pipeline 130 is opened in the state that the first steam delivery pipeline 120 is closed, that is, the first steam delivery pipeline 120 and the second steam delivery pipeline 130 are not opened at the same time, so that the amount of steam supplied to the first steam delivery pipeline 120 and the second steam delivery pipeline 130 can be guaranteed, and a better emptying effect can be achieved.

[0140] By opening the second steam delivery pipeline 130, the liquid in the second steam delivery pipeline 130 can be quickly and completely discharged from the outlet assembly 33 by using the steam in the first boiler 10.

[0141] Further, in an embodiment of the present application, the beverage machine control method further comprises the following steps after the second liquid discharge pipeline 21 is controlled to open for a preset time length:

[0142] stopping supplying liquid to the first boiler 10;

[0143] controlling the first steam delivery pipeline 120 to close and the first liquid discharge pipeline 11 to open, so that the liquid in the first boiler 10 is discharged through the first liquid discharge pipeline 11 by the steam generated in the first boiler 10;

[0144] In the embodiment, the input end of the first liquid discharge pipeline 11 is connected to the first boiler 10, and the output end of the first liquid discharge pipeline 11 is a fluid discharge outlet.

[0145] In the embodiment, when the second boiler 20 and the second steam delivery pipeline 130 are both emptied, the first steam delivery pipeline 120 and the second steam delivery pipeline 130 can be closed. At this time, the first liquid discharge pipeline 11 is opened, and the remaining steam in the first boiler 10 is used to promote the liquid in the first boiler 10 to be discharged from the first liquid discharge pipeline 11, so that the liquid in the first boiler 10 can be efficiently and completely discharged.

[0146] Further, in an embodiment of the present application, the beverage machine control method further comprises:

[0147] disconnecting the connection between the liquid source 30 and the water pump;

[0148] controlling the water pump to work, so that the liquid in the upstream pipeline between the water pump and the liquid source 30 is discharged into the pipeline downstream of the water pump.

[0149] In the embodiment, the water pump comprises a first water pump 35 and a second water pump 36. Disconnecting the connection between the liquid source 30 and the water pump can be closing a control valve on the connecting pipeline between the water pump and the liquid source 30. When the liquid source 30 is an external tap water, the liquid source 30 can be closed or the connecting pipeline between the water pump and the liquid source 30 can be disconnected. When the liquid source 30 is a liquid supply tank, the liquid supply tank can be emptied.

[0150] At this time, the water pump is started, and the liquid in the upstream pipeline of the water pump can be emptied by self-suction of the water pump.

[0151] A specific example of the present invention is that when an emptying signal is received, the liquid source 30 is first disconnected to stop the liquid supply. The first water pump 35 and the second water pump 36 are started, and the liquid in the upstream pipelines of the first water pump 35 and the second water pump 36 are emptied by self-priming of the first water pump 35 and the second water pump 36. Specifically, when the liquid source 30 stops supplying liquid, the first water pump 35 and the second water pump 36 are controlled to work so as to discharge the liquid in the pipeline between the first water pump 35 and the liquid source 30 into the pipeline downstream of the first water pump 35, and discharge the liquid in the pipeline between the second water pump 36 and the liquid source 30 into the pipeline downstream of the second water pump 36; then, the first boiler 10 is heated to generate steam in the first boiler 10, and the first boiler 10 is closed. First steam pipeline 120 is opened, and second steam pipeline 130 is opened to drain the liquid in second steam pipeline 130 via steam from first boiler 10. Then, second steam pipeline 130 is closed, and first steam pipeline 120 and second discharge control valve 22 are opened to continue draining the liquid in second boiler 20 via steam from first boiler 10. Once the liquid in second boiler 20 is drained, first steam pipeline 120 is closed, and first discharge control valve 15 is opened to continue draining the liquid in first boiler 10 via steam from first boiler 10. Specifically, when draining the liquid in second steam pipeline 130, first steam discharge branch 131 and second steam discharge branch 132 can be opened sequentially.

[0152] Whether the liquid in the second boiler 20 is drained can be determined based on the duration of the second discharge control valve 22 being open, and whether the liquid in the second steam delivery pipeline 130 is drained can be determined based on the duration of the second discharge control valve 22 being open. The entire draining process is completed automatically, with high draining efficiency and good draining effect.

[0153] Furthermore, in one embodiment of the present invention, the beverage machine control method further includes a descaling step, which includes:

[0154] Receive descaling signal;

[0155] The water pump is controlled to operate, and the liquid supply line 110 connecting the liquid inlet of the first boiler 10 and the liquid outlet of the second boiler 20 is controlled to open, so as to supply cleaning solution from the liquid source 30 to the second boiler 20 and from the second boiler 20 to the first boiler 10.

[0156] Controlling the temperature rise of the first boiler;

[0157] The first steam delivery pipeline 120 is controlled to be opened, and the second liquid discharge pipeline 21 is controlled to be opened, so that the steam in the first boiler 10 is supplied to the second boiler 20 through the first steam delivery pipeline 120 , and the cleaning solution in the second boiler 20 is discharged through the second liquid discharge pipeline 21 .

[0158] In the embodiment, the input end of the second liquid discharge pipeline 21 is connected to the bottom of the second boiler 20.

[0159] The user can select the descaling mode through the control panel of the beverage machine to send a descaling signal.

[0160] When the beverage machine receives the descaling signal, the cleaning solution in the second liquid source 32 is supplied into the first boiler 10 and the second boiler 20. After the cleaning solution reacts with the dirt in the first boiler 10 and the second boiler 20 for a period of time, specifically, after the cleaning solution is supplied into the first boiler 10 and the second boiler 20 for a preset time, the first liquid discharge pipeline 11 and the second liquid discharge pipeline 21 are opened to discharge the cleaning solution in the first boiler 10 and the second boiler 20, so that the cleaning solution can fully react with the dirt in the first boiler 10 and the second boiler 20, achieving a better descaling effect.

[0161] During the descaling process, the first boiler 10 is heated to generate steam in the first boiler 10. The steam in the first boiler 10 is transported into the second boiler 20 to increase the pressure in the second boiler 20, so that the cleaning solution containing dirt in the second boiler 20 is quickly and completely discharged through the second liquid discharge pipeline 21, without flowing through the downstream pipeline between the second boiler 20 and the outlet assembly 33, so that the dirt does not cause obstruction of the downstream pipeline between the second boiler 20 and the outlet assembly 33.

[0162] The input end of the second liquid discharge pipeline 21 is located at the bottom of the second boiler 20, so that as much dirt as possible in the second boiler 20 is discharged together with the cleaning solution.

[0163] During the descaling process, the liquid in the second boiler 20 does not flow through the downstream pipeline between the second boiler 20 and the outlet assembly 33, so that the dirt does not cause obstruction of the downstream pipeline between the second boiler 20 and the outlet assembly 33 or damage of components arranged in the downstream pipeline, such as damage of the control valve of the downstream pipeline.

[0164] Further, in the embodiment, the beverage machine control method further includes the following steps after the second liquid discharge pipeline 21 is opened for the preset time in the descaling step:

[0165] The first steam transport pipeline 120 is controlled to be closed, and the first discharge control valve 11 is controlled to be opened, so that the cleaning solution in the first boiler 10 is discharged through the first liquid discharge pipeline 11 by the steam in the first boiler 10.

[0166] In the embodiment, the input end of the first liquid discharge pipeline 11 is connected to the bottom of the first boiler 10, and the output end of the first liquid discharge pipeline 11 is a fluid discharge outlet.

[0167] In the descaling process, the cleaning solution in the second boiler 20 can be first emptied by using the steam in the first boiler 10, and then the cleaning solution in the first boiler 10 can be emptied by using the remaining steam in the first boiler 10.

[0168] When the cleaning solution in the first boiler 10 is discharged through the first liquid discharge pipeline 11, the scale and other impurities in the first boiler 10 can be taken out. The input end of the first liquid discharge pipeline 11 is arranged at the bottom of the first boiler 10, so that the scale and other impurities in the first boiler 10 can be discharged through the first liquid discharge pipeline 11 as much as possible. During the descaling process, the liquid in the first boiler 10 will not flow through the downstream pipeline between the first boiler 10 and the outlet assembly 33, and the scale and other impurities will not cause blockage of the downstream pipeline.

[0169] In summary, in the descaling mode, the present scheme can efficiently and cleanly discharge the cleaning solution in the first boiler 10 and the second boiler 20 through the first liquid discharge pipeline 11 and the second liquid discharge pipeline 21, and take out the scale and other impurities in the first boiler 10 and the second boiler 20 through the first liquid discharge pipeline 11 and the second liquid discharge pipeline 21, thereby completing the cleaning of the first boiler 10 and the second boiler 20.

[0170] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0171] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A beverage machine comprising: a liquid source; an outlet assembly for outputting a beverage; a first boiler connected between the liquid source and the outlet assembly, the first boiler having a steam outlet, the first boiler being configured to generate steam; a second boiler connected between the liquid source and the outlet assembly, the second boiler having a liquid outlet, the second boiler being configured to supply liquid to the first boiler; characterized in that it further comprises a first steam delivery line connecting the steam outlet and the liquid outlet; a second liquid discharge line having an input connected to the second boiler and an output being a fluid discharge outlet; the steam generated by the first boiler being able to pass successively through the steam outlet, the first steam delivery line and the liquid outlet into the second boiler so as to cause liquid in the second boiler to be discharged through the fluid discharge outlet of the second liquid discharge line.

2. The beverage maker of claim 1, wherein, a second discharge control valve being provided between the input of the second liquid discharge line and the output of the second liquid discharge line.

3. The beverage maker of claim 2, wherein, the beverage machine having a draining mode, the beverage machine further comprising a controller configured to: in the draining mode, control the first steam delivery line and the second discharge control valve to be open so as to cause liquid in the second boiler to be discharged by the steam in the first boiler.

4. The beverage maker of claim 1, wherein, further comprising: a first liquid discharge line having an input connected to the first boiler and an output being a fluid discharge outlet, a first discharge control valve being provided between the input of the first liquid discharge line and the output of the first liquid discharge line.

5. The beverage maker of claim 1, wherein, the liquid outlet being located at a top of the second boiler, the input of the second liquid discharge line being connected to a bottom of the second boiler.

6. The beverage maker of claim 4, wherein, the steam outlet being provided at a top of the first boiler, the input of the first liquid discharge line being connected to a bottom of the first boiler.

7. A drinks machine as claimed in any one of claims 1 to 6, characterised in that, further comprising a second steam delivery line connecting the steam outlet and the outlet assembly; the beverage machine having a draining mode, the beverage machine further comprising a controller configured to: in the draining mode, control the first steam delivery line to be closed and control the second steam delivery line to be open so as to cause liquid in the second steam delivery line to be discharged from the outlet assembly by the steam in the first boiler.

8. A drinks machine as claimed in any one of claims 1 to 6, characterised in that, the first steam delivery line being connected with an output communication control valve, the output communication control valve comprising a first valve port, a second valve port and a third valve port; the first steam delivery line comprising a first steam delivery branch connecting the steam outlet and the first valve port, the first steam delivery line further comprising a communication line connecting the second valve port and the liquid outlet, the third valve port being connected with a liquid supply line to a liquid inlet of the first boiler. The steam generated by the first boiler can be supplied to the second boiler in sequence through the steam outlet, the first steam delivery branch, the output communication control valve, the communication pipeline and the liquid outlet; The liquid of the second boiler can be supplied to the first boiler in sequence through the liquid outlet, the communication pipeline, the output communication control valve, the liquid supply pipeline and the liquid inlet.

9. The beverage maker of claim 7, wherein, The second steam delivery pipeline comprises a first steam discharge branch and a second steam discharge branch, and the beverage machine further comprises a brewing device; the first steam discharge branch is connected with the steam outlet and the outlet assembly, the brewing device is arranged on the first steam discharge branch, and the steam in the first boiler enters the first steam discharge branch through the steam outlet so that the liquid in the first steam discharge branch is discharged from the outlet assembly; The second steam discharge branch is connected with the steam outlet and the outlet assembly, and a milk source is arranged on the second steam discharge branch, and the steam in the first boiler enters the second steam discharge branch through the steam outlet so that the liquid in the second steam discharge branch is discharged from the outlet assembly.

10. The beverage maker of claim 8, wherein, A first on-off control valve is arranged on the first steam delivery branch, and the inner diameter of the pipeline connecting the steam outlet and the first on-off control valve is greater than the inner diameter of the pipeline connecting the first on-off control valve and the first valve port.

11. The beverage maker of claim 8, wherein, A first on-off control valve is arranged on the first steam delivery branch, and the length of the pipeline connecting the steam outlet and the first on-off control valve is greater than the length of the pipeline connecting the first on-off control valve and the first valve port.

12. The beverage maker of claim 8, wherein, A first on-off control valve and a first one-way control valve are arranged on the first steam delivery branch, and the first one-way control valve is arranged downstream of the first on-off control valve; the first one-way control valve is used for allowing the steam to be delivered from the first on-off control valve to the output communication control valve and for preventing the liquid from being delivered from the output communication control valve to the first on-off control valve.

13. A method of controlling a beverage machine, characterized in that, The method comprises the following steps: receiving an emptying signal; controlling the first steam delivery pipeline to be opened and the second liquid discharge pipeline to be opened, so that the steam generated in the first boiler is delivered to the second boiler through the first steam delivery pipeline, and then the liquid in the second boiler is discharged through the second liquid discharge pipeline; The first steam delivery pipeline is connected with the steam outlet of the first boiler and the liquid outlet of the second boiler, and the input end of the second liquid discharge pipeline is connected to the second boiler, and the output end of the second liquid discharge pipeline is a fluid discharge outlet.

14. The control method of the beverage maker according to claim 13, wherein After receiving the emptying signal, the following steps are further included: stopping supplying liquid to the second boiler.

15. The control method of claim 13, wherein, The input end of the second liquid discharge pipeline is connected to the bottom of the second boiler, and a second discharge control valve is arranged between the input end of the second liquid discharge pipeline and the output end of the second liquid discharge pipeline.

16. The method of claim 13-15, wherein, After receiving the emptying signal, the following steps are further included: controlling the first steam delivery pipeline to be closed and the second steam delivery pipeline connected with the steam outlet and the outlet assembly to be opened, so that the steam generated in the first boiler is supplied to the outlet assembly through the steam outlet and the second steam delivery pipeline, and liquid in the second steam delivery pipeline and the outlet assembly is discharged.

17. The method of claim 13-15, wherein, After controlling the second liquid discharge pipeline to be opened for a preset time length, the control method further comprises: stopping liquid supply to the first boiler; controlling the first steam delivery pipeline to be closed and the first liquid discharge pipeline to be opened, so that liquid in the first boiler is discharged through the first liquid discharge pipeline by steam generated in the first boiler; wherein the input end of the first liquid discharge pipeline is connected to the first boiler, and the output end of the first liquid discharge pipeline is a fluid discharge outlet.

18. The control method of claim 17, wherein, The input end of the first liquid discharge pipeline is connected to the bottom of the first boiler, and a first discharge control valve is arranged between the input end of the first liquid discharge pipeline and the output end of the first liquid discharge pipeline.

19. The control method of claim 13, wherein, The control method further comprises a descaling step, which comprises: receiving a descaling signal; controlling the water pump to work and the liquid supply pipeline connected with the liquid inlet of the first boiler and the liquid outlet of the second boiler to be opened, so that a cleaning solution is supplied from a liquid source to the second boiler and the cleaning solution is supplied from the second boiler to the first boiler; controlling the first boiler to be heated; controlling the first steam delivery pipeline to be opened and the second liquid discharge pipeline to be opened, so that steam in the first boiler is supplied to the second boiler through the first steam delivery pipeline, and the cleaning solution in the second boiler is discharged through the second liquid discharge pipeline, wherein the input end of the second liquid discharge pipeline is connected to the bottom of the second boiler.

20. The beverage machine control method of claim 19, wherein, After the second liquid discharge pipeline is opened for a preset time length, the descaling step further comprises: controlling the first steam delivery pipeline to be closed and the first liquid discharge pipeline to be opened, so that the cleaning solution in the first boiler is discharged through the first liquid discharge pipeline by steam in the first boiler; wherein the input end of the first liquid discharge pipeline is connected to the bottom of the first boiler, and the output end of the first liquid discharge pipeline is a fluid discharge outlet.

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