Cleaning circuit system and beverage machine

Abstract

The utility model provides a kind of cleaning flow path system and beverage machine, cleaning flow path system includes: water supply source;Liquid storage source is used to store liquid cleaning agent and / or scale remover;Target cleaning chamber is set to the downstream of water supply source and liquid storage source;Conveying pipeline is connected between water supply source and target cleaning chamber;Conveying pipeline is equipped with flow path switch valve and water pump, flow path switch valve includes first inlet, second inlet and outlet, first inlet is connected to water supply source, second inlet is connected to liquid storage source, outlet is connected to water pump, flow path switch valve is configured to periodically switch its internal flow path, so that first inlet and second inlet alternately communicate outlet, water pump is used to convey mixed liquid in conveying pipeline to target cleaning chamber, wherein, mixed liquid is the cleaning solution obtained by mixing after being alternately introduced from first inlet and second inlet.The above structure design not only simplifies system pipeline layout, but also effectively improves cleaning efficiency and utilization rate of cleaning agent and / or scale remover.

Description

Technical Field

[0001] This utility model relates to the field of beverage preparation technology, and in particular to a cleaning flow path system and a beverage machine. Background Technology

[0002] During daily use, beverage equipment such as coffee machines is prone to accumulating dirt or limescale in key components such as the brewer and heating element, which can affect the taste of beverages, the lifespan of the equipment, and hygiene and safety. To ensure equipment performance and user experience, it is necessary to regularly clean or descale these key components. Currently, fully automatic coffee machines on the market typically use cleaning agents or descaling agents for routine cleaning and maintenance.

[0003] The dispensing methods for cleaning or descaling agents in related technologies mainly include two types: manual dispensing of solid agents and automatic dispensing of solid agents. Manual dispensing requires frequent user intervention, resulting in a poor user experience and posing safety hazards such as agent loss or accidental ingestion by children. Automatic dispensing methods, such as those using a motor-driven rotating container, are more complex and costly, and users face the risk of exposure to irritating agents. Furthermore, both methods struggle to control the amount of cleaning or descaling agent used, easily leading to waste, overuse, or ineffective cleaning.

[0004] Therefore, there is an urgent need for a cleaning flow path system that is simple in structure, highly safe, and can accurately control the dosage of the agent, so as to improve the ease of use and cleaning and maintenance efficiency of beverage machines. Utility Model Content

[0005] The purpose of this utility model is to provide a cleaning flow path system and a beverage machine to solve the problems of complex cleaning and descaling operations, safety hazards, and uncontrollable dosage of cleaning agents or descaling agents in the prior art.

[0006] To achieve the above-mentioned objectives, this utility model provides a cleaning flow path system, comprising:

[0007] Water supply source;

[0008] Liquid storage source for storing liquid cleaning agents and / or descaling agents;

[0009] The target cleaning chamber is located downstream of the water supply source and the liquid storage source;

[0010] A delivery pipeline is connected between the water supply source and the target cleaning chamber;

[0011] The delivery pipeline is equipped with a flow path switching valve and a water pump. The flow path switching valve includes a first inlet, a second inlet, and an outlet. The first inlet is connected to the water supply source, the second inlet is connected to the liquid storage source, and the outlet is connected to the water pump. The flow path switching valve is configured to periodically switch its internal flow path, so that the first inlet and the second inlet alternately connect to the outlet. The water pump is used to deliver the mixed liquid in the delivery pipeline to the target cleaning chamber. The mixed liquid is a cleaning solution obtained by mixing after being alternately introduced from the first inlet and the second inlet.

[0012] Compared with existing technologies, the advantages of this invention are as follows: By periodically switching the flow path through a flow path switching valve, clean water from the water supply source and liquid detergent and / or descaling agent from the storage source alternately enter the delivery pipeline and mix in the pipeline, thereby forming a mixed liquid that meets the cleaning requirements. This mixed liquid is then pumped to the target cleaning chamber, achieving efficient cleaning of the target cleaning chamber. This structural design not only simplifies the system pipeline layout but also effectively improves cleaning efficiency and the utilization rate of detergent and / or descaling agent. It is suitable for automatic cleaning scenarios inside beverage machines such as coffee machines and has good application prospects and practical value.

[0013] As a further improvement of one embodiment of the present invention, the proportion of time during which the first inlet and the outlet are connected in a single switching cycle of the flow path switching valve is different from the proportion of time during which the second inlet and the outlet are connected.

[0014] As a further improvement of one embodiment of the present invention, the cumulative duration of the connection between the first inlet and the outlet is different from the cumulative duration of the connection between the second inlet and the outlet.

[0015] As a further improvement of one embodiment of the present invention, it also includes a mixer disposed between the flow path switching valve and the target cleaning chamber. The mixer includes a first body and a second body, at least a portion of the second body extends into the first body to be sealed and connected to the first body, and the first body and the second body together define a mixing chamber.

[0016] The mixing chamber is provided with a mixing element, the first main body is provided with a stepped portion, and the second main body and the stepped portion together limit the mixing element.

[0017] As a further improvement of one embodiment of the present invention, the mixing chamber has an inlet and an outlet arranged opposite to each other, the mixing element includes a blocking part and a plurality of diverting ports, the plurality of diverting ports being arranged at intervals around the blocking part on the side of the blocking part; along the liquid inflow direction of the inlet, the projection of the inlet is within the projection range of the blocking part, and / or, the projection of the outlet is within the projection range of the blocking part.

[0018] As a further improvement of one embodiment of the present invention, a flow meter is also provided on the delivery pipeline, and the flow meter is disposed between the mixer and the water pump.

[0019] As a further improvement of one embodiment of the present invention, the conveying pipeline includes a mixed conveying section located between the outlet and the flow meter, the mixed conveying section including at least two bends.

[0020] As a further improvement of one embodiment of the present invention, a control valve is provided between the liquid storage source and the flow path switching valve; the liquid storage source includes a first supply container for containing cleaning agent and a second supply container for containing descaling agent, and the control valve is configured to operablely connect one of the first supply container and the second supply container to the second inlet.

[0021] As a further improvement of one embodiment of the present invention, the target cleaning chamber includes a first target cleaning chamber and a second target cleaning chamber. The water pump is configured to deliver a mixed liquid obtained by mixing the cleaning agent in the first supply container with water in the water supply source to the first target cleaning chamber, or to deliver a mixed liquid obtained by mixing the descaling agent in the second supply container with water in the water supply source to the second target cleaning chamber.

[0022] This utility model also provides a beverage machine, including a brewer and / or a heater. The beverage machine also includes a cleaning flow path system as described in any of the above embodiments, wherein the brewing chamber of the brewer and / or the water-containing chamber of the heater are configured as the target cleaning chamber. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the water path of a cleaning flow path system according to one embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the water path of a cleaning flow path system according to another embodiment of this utility model.

[0025] Figure 3 yes Figure 2 A schematic diagram of the mixer.

[0026] Figure 4 yes Figure 3 A schematic diagram of the mixer.

[0027] Figure 5 yes Figure 2 The diagram shows the water flow path of the cleaning system, which illustrates the liquid flow direction for cleaning the first target cleaning chamber.

[0028] Figure 6 yes Figure 2 The diagram shows the water flow path of the cleaning system, which illustrates the liquid flow direction for cleaning the second target cleaning chamber.

[0029] The repeated use of reference numerals in this specification and the accompanying drawings is intended to indicate the same or similar features or elements of this application. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0031] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms for spatial relative position may be intended to include different orientations of the equipment in use or operation other than those shown in the figures. The terms “first,” “second,” and “third” used herein are interchangeable to distinguish one component from another, and these terms are not intended to indicate the location or importance of individual components.

[0032] Reference Figure 1 This embodiment provides a cleaning flow path system, taking an application in a beverage machine 100 such as a coffee machine as an example, to achieve automatic cleaning and / or descaling of key internal components of the equipment. The cleaning flow path system includes a water supply source 20, a liquid storage source 30, a target cleaning chamber, and a delivery pipeline 40. The water supply source 20 is used to provide clean water to downstream components; the water supply source 20 can be a water tank, bottled water, or a municipal tap water pipeline. The liquid storage source 30 is used to store the liquid cleaning agent and / or descaling agent required for cleaning the target cleaning chamber. The target cleaning chamber is located downstream of the water supply source 20 and the liquid storage source 30. The target cleaning chamber can receive a mixed liquid formed by mixing the liquid cleaning agent and / or descaling agent from the liquid storage source 30 with clean water from the water supply source 20, or it can receive clean water from the water supply source 20, to achieve a thorough rinsing of the target cleaning chamber.

[0033] The delivery pipeline 40 connects the water supply source 20 and the target cleaning chamber to deliver clean water from the water supply source 20 to the target cleaning chamber. The delivery pipeline 40 is equipped with a flow path switching valve 41 and a water pump 42. The flow path switching valve 41 includes a first inlet 411, a second inlet 412, and an outlet 413. The first inlet 411 is connected to the water supply source 20, the second inlet 412 is connected to the liquid storage source 30, and the outlet 413 is connected to the water pump 42. The flow path switching valve 41 is configured to periodically switch its internal flow path, so that the first inlet 411 and the second inlet 412 alternately connect to the outlet 413. The water pump 42 is used to deliver the mixed liquid in the delivery pipeline 40 to the target cleaning chamber. The mixed liquid is a cleaning solution obtained by alternatingly introducing and mixing the liquid from the first inlet 411 and the second inlet 412.

[0034] By periodically switching the flow path, clean water from the water supply source 20 and liquid detergent and / or descaling agent from the storage source 3 alternately enter the delivery pipeline 40 and mix in the pipeline 40, forming a mixed liquid that meets the cleaning requirements. This mixture is then pumped by the water pump 42 to the target cleaning chamber, achieving efficient and thorough cleaning. This structural design not only simplifies the system piping layout but also effectively improves cleaning efficiency and the utilization rate of detergent and / or descaling agent. It is suitable for automatic cleaning scenarios inside beverage machines such as coffee machines and has good application prospects and practical value.

[0035] Furthermore, the periodic switching time interval of the flow path switching valve 41 can be adjusted according to actual cleaning needs to adapt to different cleaning intensities and liquid ratio requirements, thereby achieving a personalized cleaning mode. In practical implementation, the water pump 42 and the flow path switching valve 41 can be synchronously controlled by a controller to ensure a precise and stable mixing ratio of clean water and cleaning agent. The liquid ratio can be understood as the ratio of liquid cleaning agent to diluted clean water, or the ratio of liquid descaling agent to diluted clean water.

[0036] In one embodiment, the controller can precisely control the start and stop of the water pump 42 and the switching time of the flow path switching valve 41 according to a preset program. Taking the formation of a cleaning solution with a concentration of 3:1 (clean water and liquid detergent and / or descaling agent) as an example, the switching time of the flow path switching valve 41 can be set to allow the first inlet 411 to be open for a cumulative 75% of its duration and the second inlet 412 to be open for a cumulative 25% of its duration. The cumulative opening time of each inlet can be the total time that inlet is open during the pumping process of the water pump 42. The first inlet 411 and the second inlet 412 can be opened alternately multiple times, thereby achieving thorough mixing of clean water and liquid detergent and / or descaling agent within the delivery pipeline 40. In this way, the flow path switching valve 41 can continuously switch the input of clean water and detergent and / or descaling agent during the operation of the water pump 42, making the mixing process of the cleaning solution more uniform and efficient. Simultaneously, since the switching time of the flow path switching valve 41 is flexibly adjustable, it can adapt to various cleaning needs, such as high-intensity descaling or light rinsing.

[0037] In actual operation, the preset program can be set to determine the concentration ratio of the cleaning solution formed by the corresponding detergent and / or descaling agent. The controller can control the cumulative opening time ratio of the first inlet 411 and the second inlet 412, as well as the periodic switching time interval of the flow path switching valve 41, according to the respective concentration ratios of the detergent and / or descaling agent. This allows for precise control of the concentration of the mixed liquid and ensures the mixing effect, thereby guaranteeing the cleaning effect on the target cleaning chamber. Furthermore, the controller can automatically adjust parameters (the cumulative opening time ratio of the first inlet 411 and the second inlet 412, and the periodic switching time interval of the flow path switching valve 41) according to different cleaning modes, ensuring that each cleaning mode achieves the optimal cleaning effect. Moreover, the entire cleaning process requires no manual intervention and is completely automated, improving cleaning efficiency and reducing errors and inconveniences that may arise from human operation, providing significant convenience and assurance for the daily maintenance of the beverage machine.

[0038] In one embodiment, the percentage of time that the first inlet 411 is connected to the outlet 413 during a single switching cycle of the flow path switching valve 41 is different from the percentage of time that the second inlet 412 is connected to the outlet 413.

[0039] For example, within a single switching cycle of the flow path switching valve 41, the first inlet 411 is connected to the outlet 413 for 80% of the time, and the second inlet 412 is connected to the outlet 413 for 20% of the time. By adjusting this time ratio, different proportions of clean water and cleaning agent or descaling agent can be achieved within a unit cycle, thereby obtaining cleaning solutions of different concentrations. This control method is simple in structure, responds quickly, and can adapt to diverse cleaning requirements, greatly improving the system's flexibility and applicability. Furthermore, since the mixing process occurs inside the delivery pipeline 40, no additional mixing device is required, further simplifying the system structure and reducing manufacturing and maintenance costs.

[0040] In one embodiment, both the liquid cleaner and the liquid descaling agent are concentrated. When using the liquid cleaner and the liquid descaling agent, they need to be diluted with clean water. Generally, within a single switching cycle of the flow path switching valve 41, the proportion of time that the first inlet 411 is connected to the outlet 413 is greater than the proportion of time that the second inlet 412 is connected to the outlet 413.

[0041] In another embodiment, the cumulative duration of communication between the first inlet 411 and outlet 413 differs from the cumulative duration of communication between the second inlet 412 and outlet 413. For example, during the entire cleaning process, the cumulative time of communication between the first inlet 411 and outlet 413 is 30 seconds, while the cumulative time of communication between the second inlet 412 and outlet 413 is 10 seconds, resulting in a mixed solution with a water-to-cleaning agent and / or descaling agent ratio of 3:1. By controlling the cumulative duration, the liquid ratio can be flexibly adjusted at different stages to meet specific needs for concentration changes. This method not only improves the accuracy of system control but also enhances adaptability to various cleaning scenarios. Generally, the cumulative duration of communication between the first inlet 411 and outlet 413 is greater than the cumulative duration of communication between the second inlet 412 and outlet 413.

[0042] Reference Figures 2 to 4 The cleaning flow path system also includes a mixer 50 disposed between the flow path switching valve 41 and the target cleaning chamber to further enhance the mixing effect of clean water with detergent and / or descaling agent. The mixer 50 includes a first body 51 and a second body 52, at least a portion of the second body 52 extending into the first body 51 for a sealing connection. The first body 51 and the second body 52 together define a mixing chamber 53. The mixing chamber 53 provides a space for thorough mixing of clean water with detergent and / or descaling agent, allowing for complete blending and thus improving mixing uniformity and efficiency.

[0043] The mixing chamber 53 is equipped with a flow mixing element 54, and the first main body 51 has a stepped portion 511. The second main body 52 and the stepped portion 511 together limit the flow mixing element 54. The flow mixing element 54 effectively increases the flow path and turbulence of the liquid within the mixing chamber 53, thereby enabling a more uniform mixing of clean water and cleaning agent and / or descaling agent in a shorter time. The structural design of the flow mixing element 54 can be optimized according to the liquid flow rate and mixing requirements, for example, by using porous drainage, spiral flow guidance, mesh diversion, or staggered turbulence columns, thereby accelerating the uniform mixing of clean water and cleaning agent and / or descaling agent to improve mixing efficiency and uniformity.

[0044] Furthermore, the inlet 522 of the mixing chamber 53 can be located in the second body 52, and the outlet 512 of the mixing chamber 53 can be located in the first body 51. A sealing ring 55 is provided between the first body 51 and the second body 52 to ensure the sealing of the mixing chamber 53. The design of the stepped portion 511 ensures the stable installation of the mixing component 54 in the mixing chamber 53, preventing the mixing component 54 from shifting or rotating under the impact of high-pressure fluid, further improving the stability and reliability of the mixing of clean water with detergent and / or descaling agent.

[0045] The mixing chamber 53 has an inlet 522 and an outlet 512 arranged opposite to each other. The mixing element 54 includes a blocking portion 541 and a plurality of branching ports 542, which are spaced apart around the blocking portion 541 on its side. Along the liquid inflow direction of the inlet 522, the blocking portion 541 may be opposite to the inlet 522. Optionally, along the liquid inflow direction of the inlet 522, the projection of the inlet 522 falls within the projection range of the blocking portion 541, and / or, along the liquid inflow direction of the inlet 522, the projection of the outlet 512 falls within the projection range of the blocking portion 541. This arrangement effectively prevents liquid from flowing directly from the inlet 522 to the outlet 512, forcing the liquid to impact the blocking portion 541 and then flow out through the branching ports 542, thereby increasing the liquid flow path and improving the mixing effect of clean water with cleaning agents and / or descaling agents. The design of the blocking portion 541 can also be optimized according to fluid dynamics principles to further enhance the turbulence effect of the liquid.

[0046] Multiple diversion ports 542 can be provided, and the multiple diversion ports 542 are arranged at intervals around the blocking part 541. The cross-section of the diversion ports 542 can be fan-shaped. By reasonably configuring the number, shape and distribution position of the diversion ports 542, a balanced distribution of different liquid flow rates can be achieved, making the mixing process of clean water with cleaning agent and / or descaling agent more efficient and stable.

[0047] Continue to refer to Figure 1 and Figure 2A flow meter 45 is also installed on the delivery pipeline 40, positioned between the mixer 50 and the water pump 42. When liquid enters the flow meter 45, the internal turbine blades of the flow meter 45 act as a miniature turbine agitator. The turbine blades inside the flow meter 45 rotate at high speed as the liquid flows through, further enhancing the shear force and mixing intensity between the liquids, thus ensuring that the clean water and cleaning agent and / or descaling agent are uniformly mixed again before entering the water pump 42. This design further improves mixing efficiency, ensuring good mixing results under different operating conditions. The secondary mixing action of the flow meter 45 significantly reduces concentration fluctuations of the cleaning agent and / or descaling agent during delivery, ensuring the consistency and reliability of the cleaning or descaling effect.

[0048] In one embodiment, the delivery pipeline 40 includes a mixing delivery section 401 located between the outlet 413 and the flow meter 45, the mixing delivery section 401 including at least two bends. By arranging the delivery pipeline 40 with multiple bends, a turbulent flow effect is achieved, thereby enabling a secondary mixing of clean water with the cleaning agent and / or descaling agent. The bends extend the flow path of the liquid during delivery, while simultaneously enhancing internal turbulence of the liquid through the hydrodynamic effects at the bends, further promoting thorough mixing of the cleaning agent and / or descaling agent with the clean water.

[0049] In addition, a control valve 43 is provided between the liquid storage source 30 and the flow path switching valve 41; the liquid storage source 30 includes a first supply container 31 for containing cleaning agent and a second supply container 32 for containing descaling agent, and the control valve 43 is configured to operablely connect one of the first supply container 31 and the second supply container 32 to the second inlet 412. By setting the control valve 43, the supply path of cleaning agent or descaling agent can be flexibly selected, thereby realizing the switching of different liquid inputs according to actual needs.

[0050] Accordingly, the target cleaning chamber includes a first target cleaning chamber 61 and a second target cleaning chamber 62. The water pump 42 is configured to deliver a mixture of detergent from the first supply container 31 and water from the water supply source 20 to the first target cleaning chamber 61, or to deliver a mixture of descaling agent from the second supply container 32 and water from the water supply source 20 to the second target cleaning chamber 62. In this way, the system can automatically select the appropriate liquid combination according to different cleaning or descaling tasks and accurately deliver it to the corresponding target cleaning chamber, thereby achieving efficient and targeted cleaning or descaling treatment. In practical applications, the first target cleaning chamber 61 and the second target cleaning chamber 62 can be used to treat different types of dirt or cleaning objects of different materials, thereby improving cleaning efficiency and effectiveness. Through the coordinated action of the control valve 43 and the flow path switching valve 41, the system ensures that the detergent or descaling agent flows only to the designated target cleaning chamber, avoiding cross-contamination.

[0051] Example of the first target cleaning chamber 61 is a brewing tank that serves as a water-containing chamber in a brewer, and example of the second target cleaning chamber 62 is a water-containing chamber in a heater.

[0052] like Figure 5 As shown, when the first target cleaning chamber 61 needs to be cleaned, the first supply container 31 and the second inlet 412 are connected through the control valve 43. The flow path switching valve 41 alternately connects the first inlet 411 and the second inlet 412 to the outlet 413 according to a preset program, such as... Figure 5 As indicated by the middle arrow, clean water and detergent are alternately fed into the delivery pipeline 40 and mixed for the first time within the pipeline. The mixed liquid undergoes a second mixing in the mixing chamber 53, a third mixing in the mixing delivery section 401 of the delivery pipeline 40, and a fourth mixing as it flows through the flow meter 45. The thoroughly mixed liquid is then delivered to the first target cleaning chamber 61, where it is cleaned before being discharged into the water storage pan. Afterward, clean water from the water supply source 20 is pumped by the water pump 42 to flush the pipes and components through which the mixed liquid flows, preventing it from affecting subsequent beverage consumption.

[0053] like Figure 6 As shown, when the second target cleaning chamber 62 needs to be cleaned, the second supply container 32 and the second inlet 412 are connected via the control valve 43. The flow path switching valve 41 alternately connects the first inlet 411 and the second inlet 412 to the outlet 413 according to a preset program, such as... Figure 6As indicated by the middle arrow, clean water and descaling agent are alternately introduced into the delivery pipeline 40 and mixed for the first time within the pipeline. The mixed liquid undergoes a second mixing in the mixing chamber 53, a third mixing in the mixing delivery section 401 of the delivery pipeline 40, and a fourth mixing as it flows through the flow meter 45. The thoroughly mixed liquid is then delivered to the second target cleaning chamber 62, where it is cleaned before being discharged into the water storage pan. Afterward, clean water from the water supply source 20 is pumped by the water pump 42 to flush the pipes and components through which the mixed liquid (clean water and descaling agent) flows, preventing the mixed liquid from affecting subsequent beverage consumption.

[0054] Continue to refer to Figure 1 and Figure 2 This utility model also relates to a beverage machine 100, including a brewer and / or a heater. The beverage machine 100 also includes the cleaning flow path system in the above embodiments, and the brewing chamber of the brewer and / or the water-containing chamber of the heater are configured as a target cleaning chamber.

[0055] Through the aforementioned structural design, the beverage machine 100 can flexibly select the use of detergents or descaling agents under different cleaning needs, ensuring that they are fully mixed with clean water and accurately delivered to the corresponding target cleaning chamber. For key parts such as the brewing chamber of the brewer or the water-containing chamber of the heater, this cleaning flow path system can effectively remove residues and / or scale, improving the cleanliness and hygiene level of the beverage machine 100. At the same time, because the cleaning flow path system has automatic switching and cross-contamination prevention functions, it greatly simplifies the user's operation process, enhancing the equipment's intelligence and ease of use.

[0056] Of course, the above-mentioned cleaning flow path system is not limited to application in coffee machines, but can also be used in other beverage brewing devices, such as tea machines or other beverage brewing devices, or water dispensers, etc. It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This descriptive method is merely for 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 can be understood by those skilled in the art.

[0057] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cleaning flow path system, comprising: Water supply source; Liquid storage source for storing liquid cleaning agents and / or descaling agents; The target cleaning chamber is located downstream of the water supply source and the liquid storage source; A delivery pipeline is connected between the water supply source and the target cleaning chamber; The feature is that the delivery pipeline is equipped with a flow path switching valve and a water pump. The flow path switching valve includes a first inlet, a second inlet, and an outlet. The first inlet is connected to the water supply source, the second inlet is connected to the liquid storage source, and the outlet is connected to the water pump. The flow path switching valve is configured to periodically switch its internal flow path, so that the first inlet and the second inlet alternately connect to the outlet. The water pump is used to deliver the mixed liquid in the delivery pipeline to the target cleaning chamber. The mixed liquid is a cleaning solution obtained by mixing after being alternately introduced from the first inlet and the second inlet.

2. The cleaning flow path system according to claim 1, characterized in that, Within a single switching cycle of the flow path switching valve, the percentage of time the first inlet is connected to the outlet is different from the percentage of time the second inlet is connected to the outlet.

3. The cleaning flow path system according to claim 1, characterized in that, The cumulative duration of the connection between the first inlet and the outlet is different from the cumulative duration of the connection between the second inlet and the outlet.

4. The cleaning flow path system according to any one of claims 1-3, characterized in that, It also includes a mixer disposed between the flow path switching valve and the target cleaning chamber, the mixer including a first body and a second body, at least a portion of the second body extending into the first body for a sealing connection with the first body, the first body and the second body together defining a mixing chamber; The mixing chamber is provided with a mixing element, the first main body is provided with a stepped portion, and the second main body and the stepped portion together limit the mixing element.

5. The cleaning flow path system according to claim 4, characterized in that, The mixing chamber has an inlet and an outlet that are arranged opposite to each other. The mixing element includes a blocking part and a plurality of diverting ports, which are spaced apart around the blocking part on the side of the blocking part. Along the liquid inflow direction of the inlet, the projection of the inlet is within the projection range of the blocking part, and / or the projection of the outlet is within the projection range of the blocking part.

6. The cleaning flow path system according to claim 4, characterized in that, A flow meter is also installed on the delivery pipeline, and the flow meter is located between the mixer and the water pump.

7. The cleaning flow path system according to claim 6, characterized in that, The delivery pipeline includes a mixed delivery section located between the outlet and the flow meter, the mixed delivery section including at least two bends.

8. The cleaning flow path system according to any one of claims 1-3, characterized in that, A control valve is provided between the liquid storage source and the flow path switching valve; the liquid storage source includes a first supply container for containing cleaning agent and a second supply container for containing descaling agent, and the control valve is configured to operablely connect one of the first supply container and the second supply container to the second inlet.

9. The cleaning flow path system according to claim 8, characterized in that, The target cleaning chamber includes a first target cleaning chamber and a second target cleaning chamber. The water pump is configured to deliver a mixed liquid obtained by mixing the cleaning agent in the first supply container with water in the water supply source to the first target cleaning chamber, or to deliver a mixed liquid obtained by mixing the descaling agent in the second supply container with water in the water supply source to the second target cleaning chamber.

10. A beverage machine, comprising a brewer and / or a heater, characterized in that, The beverage machine further includes a cleaning flow path system as described in any one of claims 1 to 9, wherein the brewing chamber of the brewer and / or the water-containing chamber of the heater are configured as the target cleaning chamber.

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