WO2025185420A1 - Beverage preparation device, control method therefor, and storage medium - Google Patents

Abstract

Disclosed are a beverage preparation device, a control method therefor, and a storage medium. The control method for the beverage preparation device comprises: upon receiving a beverage preparation start instruction, controlling a milk supply module to operate, so that milk in a storage container is drawn in from a liquid inlet port into a delivery pipe and is conveyed forward to be discharged via a liquid outlet port; and upon receiving a beverage preparation completion instruction, controlling a power module to operate, so that at least part of the milk in the delivery pipe is reversely pushed into the storage container. The present invention facilitates cleaning of residual milk in the delivery pipe, thereby preventing the residual milk from deteriorating within the delivery pipe. The residual milk is concentrated in the storage container, enabling reasonable utilization of the storage conditions of the storage container to better preserve the residual milk, facilitate reuse of the milk, and ultimately enhance the overall quality of beverage preparation.

Description

Beverage preparation equipment, control method thereof, and storage medium Technical Field

The present invention relates to the technical field of beverage preparation equipment, and in particular to beverage preparation equipment, a control method thereof, and a storage medium.

Background Art

As people's quality of life gradually improves, their demand for beverages continues to increase. The traditional way of making beverages by hand is increasingly unable to meet market demand, so a beverage preparation device is now provided that can automatically and intelligently prepare beverages.

In particular, a beverage preparation device for preparing milk beverages includes a milk supply system for preparing various types of milk beverages. The milk beverage is extracted from a milk tank by starting and stopping a pump in a delivery pipeline, and the flow rate of the extracted milk is determined by the on-off timing of an outlet valve at the end of the delivery pipeline or the start-stop timing of the pump. When the milk beverage is prepared, milk will remain in the entire delivery pipeline. If the interval between the preparation of the next cup of milk beverage is long, the residual milk in the delivery pipeline can easily deteriorate. This is especially true since milk beverages are typically stored in low-temperature storage containers, such as refrigerators. The temperature of the pipeline exposed to temperatures outside the refrigerator is higher than that inside the refrigerator. Prolonged exposure to temperatures higher than those inside the refrigerator can cause the milk beverage to deteriorate, reducing the quality of the next cup of milk beverage or further damaging the quality of the milk beverage, which is detrimental to food safety. If the milk remaining in the pipeline is discharged each time a milk beverage is prepared, a large amount of waste will result.

Summary of the Invention

The main purpose of the present invention is to provide a beverage preparation device and its control method and storage medium, aiming to solve the problem that milk residue is easily left in the delivery pipeline of traditional beverage preparation equipment, which easily reduces the quality of beverage preparation.

To achieve the above objectives, the present invention provides a control method for a beverage preparation device, wherein the beverage preparation device includes a milk supply system, the milk supply system including a storage container, a delivery pipeline, a milk supply module, and a power module, the delivery pipeline being provided with a liquid inlet port and a liquid outlet port, the liquid inlet port being connected to the storage container; the control method for the beverage preparation device comprises:

Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and deliver the milk in the storage container in a forward direction to be discharged through the liquid outlet port;

When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the storage container in reverse.

Optionally, the storage container includes a milk tank, which is used to store milk and is connected to the liquid inlet port; the control method of the beverage preparation device includes:

Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the milk tank from the liquid inlet port to the delivery pipeline and deliver the milk in the milk tank in a forward direction to be discharged through the liquid outlet port;

When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the milk tank in reverse.

Optionally, the storage container includes a milk tank and a liquid storage structure, the milk tank is used to store milk, and the milk tank and the liquid storage structure are respectively connected to the liquid inlet port; the control method of the beverage preparation device includes:

Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the milk tank from the liquid inlet port to the delivery pipeline and deliver the milk in the milk tank in a forward direction to be discharged through the liquid outlet port;

When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the liquid storage structure in reverse.

Optionally, the liquid storage structure includes a connecting pipeline, and the connecting pipeline is communicatively connected between the milk tank and the liquid inlet port.

Optionally, the connecting pipeline and the delivery pipeline can be provided as one piece or can be provided as separate pieces and then plugged together.

Optionally, the liquid storage structure includes a bypass branch, and the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port.

Optionally, the liquid storage structure further includes a collecting container, and the collecting container is connected to the bypass branch; or,

The milk supply system further includes a first waste pipe, which constitutes the bypass branch, or is connected to the bypass branch.

Optionally, the liquid storage structure and at least a portion of the delivery pipeline are respectively arranged in different accommodating spaces.

Optionally, the temperature of the liquid storage structure in the corresponding accommodating space is lower than the temperature of the delivery pipeline in the corresponding accommodating space.

Optionally, the power module includes a piston member that can reciprocate on the delivery pipeline, and a power device for driving the piston member to move; the step of controlling the operation of the power module includes:

The power device is controlled to drive the piston member to move in the reverse direction in the delivery pipeline.

Optionally, the power module includes an airflow driving device; and the step of controlling the operation of the power module includes:

The air flow driving device is controlled to operate so that the air pressure in the delivery pipeline near the liquid outlet port is greater than the air pressure near the liquid inlet port.

Optionally, the milk supply system further comprises a water supply module, and the water supply module constitutes the power module; the step of controlling the operation of the power module comprises:

The water supply module is controlled to connect external clean water to the delivery pipeline and deliver it in the reverse direction.

Optionally, the step of controlling the water supply module to connect external clean water to the delivery pipeline and deliver it in the reverse direction includes:

Obtain target water supply;

The water supply module is controlled to connect external clean water into the delivery pipeline and deliver it in the reverse direction according to the target water supply volume.

Optionally, the step of obtaining the target water supply includes:

Acquiring structure and/or flow information of the pipe section of the delivery pipeline between the clean water access position and the liquid inlet port;

Calculate the target water supply volume according to the structure and/or flow information.

Optionally, the milk supply system further comprises a sensor device, wherein the sensor device triggers a first signal when sensing clean water; and the step of controlling the water supply module to connect external clean water to the delivery pipeline and deliver the clean water in the reverse direction comprises:

Control the operation of the water supply module to connect external clean water to the delivery pipeline and deliver it in the reverse direction:

When it is determined that the sensor device triggers the first information, the water supply module is controlled to stop running immediately or stop running with a delay.

Optionally, the sensor device is arranged in the delivery pipeline; and/or,

The storage container includes a milk tank and a connecting pipeline, the connecting pipeline is connected between the milk tank and the liquid inlet port, and the sensor is arranged at any section of the delivery pipeline and the connecting pipeline or at the interface where the two are connected; and/or,

The storage container includes a milk tank and a bypass branch, the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port, and the sensor device is provided at any section of the delivery pipeline and the bypass branch or at the interface connected to each other.

Optionally, the milk supply system further includes a water supply module; after the step of controlling the power module to operate so as to reversely push at least part of the milk in the delivery pipeline into the storage container upon receiving the beverage preparation completion instruction, the step further includes:

The water supply module is controlled to connect external clean water into the delivery pipeline and deliver it in a positive direction toward the liquid outlet port.

Optionally, the milk supply system further comprises a water supply module; after the steps of controlling the milk supply module to operate upon receiving a beverage preparation start instruction so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and forwardly deliver the milk to be discharged through the liquid outlet port, and/or controlling the power module to operate upon receiving a beverage preparation completion instruction so as to reversely push at least part of the milk in the delivery pipeline into the storage container, the system further comprises:

Upon receiving a beverage preparation start instruction, controlling the water supply module to connect external clean water into the delivery pipeline and deliver it forwardly toward the liquid outlet port;

Acquiring status information of the milk in the liquid storage structure;

When the status information meets a preset condition, the milk supply module is controlled to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port.

Optionally, the milk supply system further comprises a water supply module and a fresh-keeping device, and after the steps of controlling the milk supply module to operate upon receiving a beverage preparation start instruction so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and forwardly deliver the milk to be discharged through the liquid outlet port, and/or controlling the power module to operate upon receiving a beverage preparation completion instruction so as to reversely push at least part of the milk in the delivery pipeline into the storage container, the system further comprises:

Upon receiving a beverage preparation start instruction, controlling the water supply module to connect external clean water into the delivery pipeline and deliver it forwardly toward the liquid outlet port;

The milk supply module is controlled to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port.

Optionally, the step of controlling the milk supply module to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port includes:

Controlling the milk supply module to forwardly transport the milk in the liquid storage structure toward the liquid outlet port;

The milk supply module is controlled to forwardly transport the milk in the milk tank toward the liquid outlet port.

Optionally, the milk supply system further includes a second waste pipe, which is connectable and disconnectable to the delivery pipe at a pipe section between the liquid inlet port and the liquid outlet port. The step of controlling the water supply module to connect external clean water into the delivery pipe and deliver it forward toward the liquid outlet port includes:

After controlling the second waste pipe to be connected to the delivery pipe, controlling the water supply module to connect external clean water to the delivery pipe and discharge it through the second waste pipe; or,

After controlling the second waste pipe to disconnect from the delivery pipe, controlling the water supply module to connect external clean water into the delivery pipe and discharge it through the liquid outlet port.

In addition, to achieve the above-mentioned purpose, the present invention also provides a beverage preparation device, comprising:

body;

A milk supply system includes a storage container, a delivery pipeline, a milk supply module, and a power module. The delivery pipeline is provided with a liquid inlet port and a liquid outlet port, and the liquid inlet port is connected to the storage container; and

A control device is electrically connected to the milk supply module and the power module. The control device includes a memory, a processor, and a control program for the beverage preparation device stored in the memory and executable on the processor. The control program for the beverage preparation device is configured to implement the steps of the control method for the beverage preparation device as described above.

Optionally, the storage container comprises a milk tank, which is used to store milk and is connected to the liquid inlet port; or

The storage container comprises a milk tank and a liquid storage structure. The milk tank is used to store a milk source. The milk tank and the liquid storage structure are respectively connected to the liquid inlet port. The liquid storage structure is used to store milk returned through the delivery pipeline.

Optionally, the liquid storage structure includes a connecting pipeline, and the connecting pipeline is communicatively connected between the milk tank and the liquid inlet port; and/or,

The liquid storage structure includes a bypass branch, and the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port.

Optionally, the power module includes a piston member that can reciprocate on the delivery pipeline, and a power device for driving the piston member to move; and/or,

The power module includes an airflow driving device; and/or,

The milk supply system further comprises a water supply module, and the water supply module constitutes the power module.

Optionally, the milk supply system further comprises a fresh-keeping device, and the milk tank and/or the liquid storage structure are accommodated in the fresh-keeping device.

In addition, to achieve the above-mentioned purpose, the present invention also provides a storage medium, on which a control program of a beverage preparation device is stored. When the control program of the beverage preparation device is executed by a processor, the steps of the control method of the beverage preparation device as described above are implemented.

In addition, to achieve the above-mentioned purpose, the present invention also provides a beverage preparation device, which includes a milk supply system, and the milk supply system includes a storage container, a delivery pipeline, a milk supply module and a power module. The milk supply module is arranged on the path of the delivery pipeline for sucking liquid from the storage container, and the delivery pipeline and/or the pipeline of the power module are provided with a control valve, wherein the control valve can be switchably controlled so that the power module is connected to the liquid inlet port and/or the liquid outlet port respectively, and the time for connecting to the liquid inlet port is shorter than the time for connecting to the liquid outlet port.

Optionally, the control valve is simultaneously activated to connect the power module with the liquid inlet port, and to connect the power module with the liquid outlet port; or,

The power module is only connected to any one of the liquid inlet port and the liquid outlet port in the same time period.

In the technical solution provided by the present invention, during the beverage preparation process, the milk supply module operates to form a driving force from the liquid inlet port to the liquid outlet port in the delivery pipeline, driving the milk in the storage container to be discharged toward the liquid outlet port (which is equivalent to the beverage discharge port) of the delivery pipeline; when the beverage preparation is completed, the storage container no longer supplies milk to the delivery pipeline, but a certain amount of milk is likely to remain in the delivery pipeline. At this time, by controlling the operation of the power module, a driving force from the liquid outlet port to the connecting port is formed in the delivery pipeline, driving the milk remaining in the delivery pipeline to be reversely transported into the storage container. On the one hand, it helps to clean the milk remaining in the section of the delivery pipeline from the connecting port to the liquid outlet port, thereby preventing the residual milk from deteriorating in this section of the delivery pipeline; on the other hand, the residual milk can be collected in the storage container, thereby making reasonable use of the storage conditions of the storage container, and relatively better preserving the residual milk, which helps to reuse the residual milk and ultimately helps to improve the quality of the beverage dish as a whole.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a flow chart of an embodiment of a method for controlling a beverage preparation device provided by the present invention;

FIG2 is a schematic structural diagram of a first embodiment of a milk supply system in a beverage preparation device provided by the present invention;

FIG3 is a schematic structural diagram of a second embodiment of a milk supply system in a beverage preparation device provided by the present invention;

FIG4 is a schematic structural diagram of a third embodiment of a milk supply system in a beverage preparation device provided by the present invention;

FIG5 is a schematic structural diagram of a first embodiment of a storage container in a beverage preparation device provided by the present invention;

FIG6 is a schematic structural diagram of a second embodiment of a storage container in a beverage preparation device provided by the present invention;

FIG7 is a schematic structural diagram of a third embodiment of a storage container in a beverage preparation device provided by the present invention;

FIG8 is a schematic structural diagram of a fourth embodiment of a storage container in a beverage preparation device provided by the present invention;

FIG9 is a schematic structural diagram of the hardware operating environment of the control device provided by the present invention.

Description of Figure Numbers:

1. Milk supply system; 100. Storage container; 110. Milk tank; 121. Connecting pipeline; 122. Bypass branch; 123. Collecting container; 124. First waste pipeline; 200. Delivery pipeline; 210. Liquid inlet port; 220. Liquid outlet port; 300. Milk supply module; 310. Milk supply pump body; 320. Switch valve body; 330. Discharge valve body; 400. Water supply module; 410. Water supply pump body; 420. First water supply pipeline; 421. First valve body; 430. Second water supply pipeline; 431. Second valve body; 440. Third water supply pipeline; 441. Third valve body; 450. Water source; 500. Fresh-keeping device; 600. Second waste pipeline; 700. Control device; 710. Processor; 720. Communication bus; 730. User interface; 740. Network interface; 750. Memory.

The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

DETAILED DESCRIPTION

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

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

Please refer to Figures 2 to 9. The present invention provides a beverage preparation device. The present design does not limit the specific type of beverage preparation device, and it can be any device or product that can extract and brew materials to ultimately obtain a beverage. Specifically, the beverage preparation device can be, but is not limited to, a coffee machine, a soy milk machine, etc. Correspondingly, the materials involved in the present invention can be bean materials such as coffee beans and soybeans. For ease of understanding, the following embodiments are all described using the beverage preparation device as a coffee machine, where the materials include coffee beans that have not been ground by a grinding device, and coffee powder obtained after being ground by a grinding device.

The beverage preparation device includes a body, a milk supply system 1 and a control device 700 .

The machine body includes a shell, the interior of the shell defines a receiving cavity, and the exterior of the shell defines a beverage preparation area.

The machine body may further include, for example, a brewing device disposed within the housing cavity. The brewing device may include, but is not limited to, a brewing cylinder and a brewing mechanism. The brewing cylinder can be filled with a desired amount of coffee powder, which is then extracted and brewed by the brewing mechanism to produce a coffee beverage. Depending on the brewing requirements, the brewing mechanism may primarily comprise a heating mechanism and/or a water supply assembly. The brewing mechanism's outlet is connected to the preparation area to deliver the brewed coffee beverage to the preparation area.

The machine body may further include, for example, a grinding device housed within the housing cavity. The grinding device may include, but is not limited to, a grinding cylinder and a grinding mechanism. The grinding cylinder defines a grinding chamber; the grinding mechanism may include, for example, a movable cutting tool and a drive assembly that actuates the cutting tool. The cutting tool may be designed to have a desired shape and suitable motion according to actual needs, facilitating puncturing, grinding, stirring, and other crushing operations on granular materials such as coffee beans. Specific examples include bayonets and blade discs.

Depending on the application requirements, the milk supply system 1 can be completely housed within the housing cavity, or at least partially located outside the housing cavity. To facilitate the acquisition of a milk source that meets both storage and quality requirements, the following embodiments are described using the example of a milk supply system 1 that is at least partially located outside the housing cavity.

The milk supply system 1 includes a storage container 100 , a delivery pipeline 200 , a milk supply module 300 , and a power module. The delivery pipeline 200 is provided with a liquid inlet port 210 and a liquid outlet port 220 , and the liquid inlet port 210 is connected to the storage container 100 .

During the beverage preparation process, the milk supply module 300 operates, generating a driving force from the liquid inlet port 210 to the liquid outlet port 220 in the delivery pipeline 200, driving the milk in the storage container 100 to be discharged to the liquid outlet port 220 of the delivery pipeline 200 (which is equivalent to the beverage discharge port); when the beverage preparation is completed, the storage container 100 no longer supplies milk to the delivery pipeline 200, but a certain amount of milk is likely to remain in the delivery pipeline 200. At this time, by controlling the operation of the power module, a driving force is generated in the delivery pipeline 200 from the liquid outlet port 220 to the milk withdrawal end point. , driving the residual milk in the delivery pipeline 200 to be delivered back to the storage container 100, on the one hand, helping to clean the residual milk in the section of the delivery pipeline 200 from the milk withdrawal end point to the liquid outlet port 220, and preventing the residual milk from deteriorating in this section of the delivery pipeline 200; on the other hand, the residual milk can be collected in the storage container 100, so that the storage conditions of the storage container 100 can be reasonably utilized, the residual milk can be relatively better preserved, which is conducive to the secondary utilization of the residual milk, and ultimately helps to improve the overall quality of drinks and dishes.

It will be appreciated that the storage container 100 is at least used to store milk. Therefore, in actual use, as shown in Figures 5 to 8 , the storage container 100 may include a milking tank 110. The milking tank 110 can be any container capable of storing a desired amount of milk, and its shape, structure, and size are not limited. The number of milking tanks 110 provided within the housing is not limited, and can be one or at least two. When there are at least two milking tanks 110, each milking tank 110 can be independently provided or individually connected in a detachable manner. Each milking tank 110 can be integrally formed with the housing, that is, directly defined during the manufacturing process of the housing. Alternatively, each milking tank 110 can be separately molded and then detachably or non-detachably connected to the housing, so that the structures of the milking tank 110 and the housing remain independent of each other.

As shown in FIG. 5 , when the storage container 100 only includes the milk tank 110 , one end of the delivery pipeline 200 extends into the milk tank 110 and directly contacts the milk in the milk tank 110 , forming a liquid inlet port 210 .

Depending on actual needs, the milking tank 110 itself can be configured with any suitable structure that meets the desired storage conditions. For example, if the milking tank 110 needs to maintain a sealed storage condition, it can be equipped with a sealing structure at each connection between its internal cavity and the external environment. If the milking tank 110 needs to maintain a constant temperature, it can be equipped with a heat preservation structure, a heating device, and/or a cooling device. The heating device and/or cooling device can exchange heat with the internal cavity of the milking tank 110 to maintain the internal temperature of the milking tank 110 within the desired range.

Alternatively, the storage space within the milk tank 110 can be configured to provide the required storage conditions for the milk tank 110. Specifically, in one embodiment, the milk supply system 1 further includes a fresh-keeping device 500, such as a refrigerator. The fresh-keeping device 500 defines a fresh-keeping cavity within which the milk tank 110 is housed. This allows milk originally stored within the cavity and returned via the delivery pipeline 200 to be well preserved within the interior of the milk tank 110, preventing it from spoiling. The presence of the fresh-keeping device 500 allows the structure of the milk tank 110 to be kept as simple as possible, thereby simplifying the structural design of the milk tank 110.

Furthermore, as shown in Figures 6 to 8 , the storage container 100 can also include a liquid storage structure in addition to the milking tank 110. The liquid storage structure forms a liquid storage cavity capable of storing a certain amount of milk. The milking tank 110 and the liquid storage structure are independent of each other and are not configured as a single structure. The milking tank 110 and the liquid storage structure are each connected to the liquid inlet port 210 of the delivery pipeline 200. In this way, the milking tank 110 serves solely as a milk source, while the liquid storage structure collects milk returned from the delivery pipeline 200. This ensures that the milk returned from the delivery pipeline 200 is isolated from the milk source and does not contaminate the milk source.

Similarly, depending on actual needs, the liquid storage structure itself can be configured with any suitable structure that meets the required storage conditions. For example, if the liquid storage structure needs to maintain a sealed storage condition, it can be equipped with a sealing structure at each connection between its internal cavity and the external environment. If the liquid storage structure needs to maintain a constant temperature storage condition, it can be equipped with a thermal insulation structure, a heating device, and/or a cooling device. The heating device and/or cooling device can exchange heat with the liquid storage cavity to maintain the temperature of the liquid storage cavity within the desired range.

Alternatively, the storage space within the liquid storage structure can be configured to provide the required storage conditions for the liquid storage structure. Specifically, in one embodiment, the milk supply system 1 further includes a fresh-keeping device 500, such as a refrigerator. The fresh-keeping device 500 includes a fresh-keeping cavity within which the liquid storage structure is housed. This ensures that milk returned via the delivery pipeline 200 is well preserved within the cavity and is less likely to deteriorate. When the fresh-keeping device 500 is provided, the liquid storage structure can be kept as simple as possible, thereby simplifying its structural design.

Furthermore, in one embodiment, the liquid storage structure and at least a portion of the delivery pipeline 200 are disposed in separate accommodation spaces. This allows the different accommodation spaces to effectively differentiate the milk storage effect of the liquid storage structure from that of the delivery pipeline 200. Furthermore, the milk storage effect of the liquid storage structure is preferably superior to that of the delivery pipeline 200, ensuring that milk in the delivery pipeline 200 is less likely to deteriorate when it returns to the liquid storage cavity than if it remains in the delivery pipeline 200.

It should be noted that the above-mentioned accommodating space can be a space exposed inside or outside the receiving cavity of the body. When exposed outside the receiving cavity of the body, the accommodating space can be a space exposed indoors or outdoors.

There are several ways to achieve the goal of making the storage structure more effective than the delivery pipeline 200 in storing milk:

In one application, the temperature of the liquid storage structure in the corresponding accommodation space can be set lower than the temperature of the delivery pipeline 200 in the corresponding accommodation space. For example, when the preservation device 500 is provided, the liquid storage structure is at least partially accommodated in the preservation cavity of the preservation device 500.

And/or in one application, the sealing performance of the liquid storage structure in the corresponding accommodating space can be set to be higher than the sealing performance of the delivery pipeline 200 in the corresponding accommodating space, thereby reducing the material exchange between the environment inside and outside the liquid storage cavity, preventing bacteria and other substances in the external environment from entering the liquid storage cavity to contaminate the milk, and reducing the degree of oxidation and deterioration of the milk in the liquid storage cavity.

It should be noted that the storage effect of the liquid storage structure and the delivery pipeline 200 on milk storage generally refer primarily to the storage effect of the portion of the liquid storage structure located within its own storage space and the section of the delivery pipeline 200 located within its own storage space. Connection transition points, such as the connection between the liquid storage structure and the delivery pipeline 200, are generally not considered.

In view of the above, the specific solution of the liquid storage structure is not limited:

In one embodiment, as shown in FIG6 , the liquid storage structure may include a connecting pipe 121 that is connected between the milking tank 110 and the liquid inlet port 210 . One end of the connecting pipe 121 can extend into the milking tank 110 and come into contact with the milk in the milking tank 110 ; the other end of the connecting pipe 121 is connected to the delivery pipe 200 .

It should be noted that, in one application, the connecting pipe 121 and the delivery pipe 200 can be integrally formed, that is, the section of the delivery pipe 200 near the milk tank 110 directly constitutes the connecting pipe 121. In this case, the connecting pipe 121 can be formed by a section of the delivery pipe 200 near its own pipe opening, or it can be formed by any section of the pipe between its two pipe openings. Alternatively, in another application, the connecting pipe 121 and the delivery pipe 200 can be separately provided and then plugged together. The plug-in combination method of the connecting pipe 121 and the delivery pipe 200 is not limited and can be one or more of the following methods: threaded connection, interference fit, snap fit, etc.

When the fresh-keeping device 500 is provided, the connecting pipe 121 can be placed outside the fresh-keeping cavity, or, as shown in FIG6 , the connecting pipe 121 can be housed together with the milk tank 110 in the fresh-keeping cavity, so that the storage space of the connecting pipe 121 and the milk tank 110 are substantially consistent, and the storage effect of the connecting pipe 121 on milk liquid is substantially the same as that of the milk tank 110. Furthermore, the storage effect of the connecting pipe 121 on milk liquid is better than that of the delivery pipe 200.

In another embodiment, as shown in Figures 7 and 8 , the liquid storage structure may include a bypass branch 122. The milking tank 110 and the bypass branch 122 are independently provided and are each connected to the liquid inlet port 210. One end of the delivery pipeline 200 extends into the milking tank 110 and is capable of contacting the milk therein, forming the liquid inlet port 210; the other end of the delivery pipeline 200 forms the liquid outlet port 220. The bypass branch 122 is connected to any section of the delivery pipeline 200 between the liquid inlet port 210 and the liquid outlet port 220.

As shown in FIG7 , the bypass branch 122 can be located in substantially the same space as the milk tank 110. For example, when a fresh-keeping device 500 is provided, the bypass branch 122 and the milk tank 110 can be housed together in the fresh-keeping cavity. Similarly to the above, this helps ensure that the bypass branch 122 provides substantially the same milk storage effect as the milk tank 110, and that the bypass branch 122 provides a superior milk storage effect to that of the milk delivery pipeline 200.

The bypass branch 122 can be configured to store milk at approximately the same level as the milk tank 110, and significantly better than the milk storage performance of the delivery pipeline 200. This significantly reduces the deterioration of milk returned from the delivery pipeline 200 in the bypass branch 122, allowing for secondary use. Therefore, if the bypass branch 122 is sufficiently long and/or has a sufficiently large radial cross-sectional area, providing sufficient volume, the bypass branch 122 can directly store milk returned from the delivery pipeline 200. Alternatively, if the bypass branch 122's volume is insufficient to store the amount of milk returned from the delivery pipeline 200 due to limitations such as the installation environment, the liquid storage structure further includes a collection container 123, which is in communication with the bypass branch 122. The collecting container 123 can assist the bypass branch 122 in forming a larger volume, which is sufficient for storing the milk returned through the delivery pipeline 200 in transit.

Alternatively, as shown in FIG8 , the storage effect of the bypass branch 122 on milk can be set to be roughly the same as the storage effect of the delivery pipeline 200 on milk, or even set to be worse than the storage effect of the delivery pipeline 200 on milk. In this case, the quality of the milk in the bypass branch 122 that is returned via the delivery pipeline 200 may gradually deteriorate over time and other factors, and may not necessarily be reusable. Based on this, the milk supply system 1 also includes a first waste discharge pipeline 124, which constitutes the bypass branch 122 or is connected to the bypass branch 122. The first waste discharge pipeline 124 is directly connected to the external environment, or is connected to a predetermined waste discharge chamber. The milk in the delivery pipeline 200 is ultimately discharged through the first waste discharge pipeline 124 and discarded.

In the above embodiment, the connection between two structures, such as between two pipe segments, can be provided with an opening and closing member as needed, allowing the two pipe segments to switch between open and closed states. Alternatively, when, for example, as shown in FIG6 , the milking tank 110 has its opening facing vertically upward, and the connecting pipe 121 primarily utilizes a horizontally extending pipe segment to transfer and store milk returned via the delivery pipe 200, the connecting pipe 121 can be directly connected to the milking tank 110 without the need for an opening and closing member.

The milk supply module 300 can mainly provide a positive driving force from the liquid inlet port 210 to the liquid outlet port 220 for the delivery pipeline 200, so that the milk in the milk tank 110 can be delivered to the preparation area via the delivery pipeline 200. The milk supply module 300 can include but is not limited to a milk supply pump body 310.

2 to 4 , the milk supply module 300 may further include a switch valve 320 . The switch valve 320 is disposed on the delivery pipeline 200 . By controlling the opening and closing of the switch valve 320 , the flow between the liquid inlet 210 and the liquid outlet 220 of the delivery pipeline 200 can be connected or disconnected.

The direction from the liquid inlet port 210 to the liquid outlet port 220 in the delivery pipeline 200 is considered forward, and the direction from the liquid outlet port 220 to the liquid inlet port 210 is considered reverse. When the delivery pipeline 200 is delivering milk or water in the forward direction, the milk or water can ultimately be directly discharged from the liquid outlet port 220. Alternatively, in one embodiment, the milk supply system 1 further includes a second waste pipe 600, which is connected to the delivery pipeline 200 and is positioned closer to the liquid outlet port 220 than the liquid inlet port 210. The second waste pipe 600 can be directly connected to the delivery pipeline 200 due to its orientation relative to the delivery pipeline 200. Alternatively, the second waste pipe 600 can be connected to the delivery pipeline 200 via the discharge valve body 330. By controlling the opening and closing of the discharge valve body 330, the connection and cutoff between the delivery pipeline 200 and the second waste discharge pipeline 600 can be achieved, thereby controlling the milk or clean water transported in the delivery pipeline 200 to be finally discharged outwardly from the liquid outlet port 220 or discharged outwardly from the second waste discharge pipeline 600.

There are no restrictions on the power module solution:

In one embodiment, the power module includes a piston that reciprocates between a liquid inlet port 210 and a liquid outlet port 220, and a power device for driving the piston. The reciprocating motion of the piston can drive the milk or water in the delivery pipeline 200 in either a forward or reverse direction. For example, to reversely transfer at least part of the milk in the delivery pipeline 200 to the storage container 100 (the milking tank 110 and/or the liquid storage structure), the piston can be operated to move from any section of the delivery pipeline 200 near the liquid outlet port 220 toward the liquid inlet port 210 of the delivery pipeline 200. The piston pushes the remaining milk in the delivery pipeline 200 back into the storage container 100 without introducing any impurities into the storage container 100. At the same time, the piston can slide and abut against the inner wall of the delivery pipeline 200, that is, it can scrape off the milk remaining on the inner wall of the delivery pipeline 200 and push it to the storage container 100, which helps to minimize the amount of milk residue in the delivery pipeline 200 as much as possible, thereby avoiding milk deterioration or pipeline pollution in the delivery pipeline 200.

Alternatively, in one embodiment, the power module includes an airflow drive device. The airflow drive device, for example, can generate airflow within the delivery pipeline 200 and adjust the airflow direction to forward or reverse, and can be a fan. The airflow drive device can return residual milk within the delivery pipeline 200 to the storage container 100 (the milking tank 110 and/or the liquid storage structure). Because the airflow generated by the airflow drive device is generally relatively clean, it will not introduce impurities into the storage container 100, nor will it impose additional burdens on the structural design of the delivery pipeline 200, resulting in an overly large diameter or overly complex structure. The airflow drive device can generate airflows of various temperatures and humidities according to actual needs.

Alternatively, in one embodiment, the milk supply system 1 further includes a water supply module 400, which constitutes the power module. The water supply module 400 may include, but is not limited to, a water supply pump 410. The water supply pump 410 can be directly connected to a water source 450 external to the system, or it can be connected to a water source 450 within a water storage tank located within the system, and adjust the direction of fresh water delivery within the delivery pipeline 200. When the water supply module 400 drives fresh water forward within the delivery pipeline 200, it can return any remaining milk in the delivery pipeline 200 to the storage container 100 (the milking tank 110 and/or the liquid storage structure), thereby clearing any remaining milk within the delivery pipeline 200.

The specific solution of the water supply module 400 is not limited:

Referring to Figures 2 and 3, in one embodiment, the water supply module 400, in addition to the aforementioned water supply pump 410 and water source 450, further includes a first water supply pipeline 420, a second water supply pipeline 430, a first valve 421, and a second valve 431. The first water supply pipeline 420 and the second water supply pipeline 430 are arranged in parallel, with one end of each being connected to the water source 450 and the other end being connected to the delivery pipeline 200. The first valve 421 is provided in the first water supply pipeline 420 and is capable of controlling the flow of the first water supply pipeline 420. The second valve 431 is provided in the second water supply pipeline 430 and is capable of controlling the flow of the second water supply pipeline 430.

Furthermore, a first connection point is formed between the first water supply line 420 and the delivery line 200, and a second connection point is formed between the second water supply line 430 and the delivery line 200. The on-off valve body 320 in the milk supply module 300 is located between the first and second connection points. The first connection point is located closer to the liquid inlet port 210 of the delivery line 200, while the second connection point is located closer to the liquid outlet port 220 of the delivery line 200. The milk supply pump body 310 is located on the side of the second connection point away from the first connection point.

The water supply pump body 410 is connected at least between the water source 450 and the first water supply line 420, providing driving force for the clean water in the first water supply line 420. As shown in Figure 2, the water supply pump body 410 can also be connected between the water source 450 and the second water supply line 430, providing driving force for the clean water in the second water supply line 430. Alternatively, as shown in Figure 3, the second water supply line 430 can be directly connected to the water source 450, with the milk supply line providing driving force for the clean water in the second water supply line 430.

Alternatively, referring to Figure 4 , in one embodiment, in addition to the water supply pump body 410 and water source 450 described above, the water supply module 400 further includes a third water supply pipeline 440 and a third valve body 441. One end of the third water supply pipeline 440 is connected to the water source 450, and the other end is connected to the delivery pipeline 200. The water supply pump body 410 is disposed on the third water supply pipeline 440. A third connection point is formed between the third water supply pipeline 440 and the delivery pipeline 200. The third connection point is located on the side of the on-off valve body 320 away from the milk supply pump body 310. The third valve body 441 is disposed on the delivery pipeline 200 and is located between the third connection point and the liquid inlet port 210.

In one embodiment, the milk supply system 1 further comprises a sensor, which forms a sensing position. The sensor triggers a first signal when it senses water flowing through the sensing position, and triggers a second signal when it senses milk flowing through the sensing position.

It should be noted that, according to actual needs, the sensor device can be directly arranged at any section of the delivery pipeline 200, the milk tank 110, the connecting pipeline 121, the bypass branch 122, or at the interfaces connected to each other.

When the sensor device is positioned exactly at the milk withdrawal end point where the milk is withdrawn from the delivery pipeline 200, the milk withdrawal end point constitutes the sensing position. Upon receiving the sensing signal from the sensor device, the control device 700 determines whether the milk or water currently reaching the milk withdrawal end point is milk or water by determining whether the sensing signal is the first information or the second information.

When the sensor device is installed in any section of the delivery pipeline 200, the milk tank 110, the connecting pipeline 121, or the bypass branch 122, there may be a certain distance between its sensing position and the milk withdrawal end point. Because the relative position between the sensing position and the milk withdrawal end point is fixed and unique, upon receiving a sensing signal from the sensor device, the control device 700 can determine whether milk or water has currently arrived at the sensing position by determining whether the sensing signal is the first information or the second information, and then calculate when the milk or water will reach the milk withdrawal end point.

It should be noted that the location of the milk withdrawal termination point is associated with the specific structure of the milk supply system 1. In the embodiment shown in Figure 5, the milk withdrawal termination point is the liquid inlet port 210 of the delivery pipeline 200; in the embodiment shown in Figure 6, the milk withdrawal termination point is also the liquid inlet port 210 of the delivery pipeline 200, that is, the connection between the delivery pipeline 200 and the connecting pipeline 121; in the embodiment shown in Figure 7, the milk withdrawal termination point is the connection between the delivery pipeline 200 and the bypass branch 122; in the embodiment shown in Figure 8, the milk withdrawal termination point can be the connection between the delivery pipeline 200 and the first waste pipe 124, or any section of the first waste pipe 124.

The type of sensor device is not limited, and may include, for example, an image recognition device, a photoelectric detection device, or a device that senses a substance such as protein. The sensor device can accurately determine the final location of the milk returned within the delivery pipeline 200, thereby ensuring that the milk returned within the delivery pipeline 200 is completely returned to the storage container 100 and that clean water does not enter the storage container 100.

In addition, the present invention also provides a beverage preparation device, which includes a milk supply system 1, and the milk supply system includes a storage container 100, a delivery pipeline 200, a milk supply module 300 and a power module. The milk supply module 300 is arranged on the path of the delivery pipeline 200 for sucking liquid from the storage container 100, and the delivery pipeline 200 and/or the pipeline of the power module are provided with a control valve, wherein the control valve can be switchably controlled so that the power module is connected to the liquid inlet port 210 and/or the liquid outlet port 220 respectively, and the time for connecting to the liquid inlet port 210 is shorter than the time for connecting to the liquid outlet port 220. In this way, the path between the power module and the liquid inlet port 210 can be made longer and shorter than the path between the power module and the liquid outlet port 220. This also shortens the path for milk withdrawal from the delivery pipeline 200 to a certain extent, allowing the power module to discharge the remaining milk in the delivery pipeline 200 through the liquid outlet port 220 as much as possible, minimizing the amount of milk returned to the storage container 100. At the same time, the power module is prevented from withdrawing substances other than milk into the storage container 100. For example, in a specific application, the communication time between the power module and the liquid inlet port 210 is generally controlled to be around 300 ms.

In a specific embodiment, the control valve can be activated to simultaneously connect the power module to the liquid inlet port 210 and to connect the power module to the liquid outlet port 220. Alternatively, in one embodiment, the power module is connected to only one of the liquid inlet port 210 and the liquid outlet port 220 during the same time period. This can be selectively set according to actual needs.

In addition, based on any of the above embodiments, the control device 700 is electrically connected to the milk supply module 300 and the power module, and the control device 700 includes a memory 750, a processor 710, and a control program for the beverage preparation equipment stored in the memory 750 and executable on the processor 710.

9 , which is a schematic structural diagram of a control device 700 for a hardware operating environment according to an embodiment of the present invention.

As shown in Figure 9, the control device 700 may include a processor 710, such as a central processing unit (CPU), a communication bus 720, a user interface 730, a network interface 740, and a memory 750. The communication bus 720 is used to enable communication between these components. The user interface 730 may include a display and an input unit, such as a keyboard. Optionally, the user interface 730 may also include a standard wired interface or a wireless interface. The network interface 740 may optionally include a standard wired interface or a wireless interface (such as a wireless fidelity (WI-FI) interface). The memory 750 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 750 may be a storage device independent of the processor 710.

Those skilled in the art will appreciate that the structure shown in FIG9 does not limit the control device 700 , and may include more or fewer components than shown, or a combination of certain components, or a different arrangement of components.

As shown in FIG. 9 , the memory 750 as a storage medium may include an operating system, a network communication module, a user interface 730 module, and a control program for the beverage preparation device.

In the control device 700 shown in Figure 9, the network interface 740 is mainly used for data communication with the network server; the user interface 730 is mainly used for data interaction with the user; the processor 710 and the memory 750 in the control device 700 of the present invention can be set in the beverage preparation equipment, and the control device 700 calls the control program of the beverage preparation equipment stored in the memory 750 through the processor 710, and executes the control method of the beverage preparation equipment provided by the embodiment of the present invention.

In view of the above, referring to FIG1 , an embodiment of the present invention provides a method for controlling a beverage preparation device.

As described above, the beverage preparation device includes a milk supply system 1, which includes a storage container 100, a delivery pipeline 200, a milk supply module 300, and a power module. The delivery pipeline 200 is provided with a liquid inlet port 210 and a liquid outlet port 220. When the liquid inlet port 210 is connected to the storage container 100, the control method of the beverage preparation device provided by the present invention includes:

Step S100 : upon receiving a beverage preparation start instruction, the milk supply module 300 is controlled to operate so as to connect the milk in the storage container 100 to the delivery pipeline 200 through the liquid inlet port 210 and deliver the milk in the storage container 100 forward to be discharged through the liquid outlet port 220 .

In this embodiment, when the control device 700 receives a drink preparation start command, the entire device enters a drink preparation mode. It should be noted that the drink preparation start command can be manually entered by the user, for example, through a control panel located on the device, or triggered by a mobile terminal connected to the control device 700, without limitation. The entire device generally has multiple preset drink preparation modes. The drink preparation mode discussed in the following embodiments primarily refers to a milk drink preparation mode, i.e., a preparation mode that requires the milk supply system 1 to operate.

When the machine enters beverage preparation mode, the control device 700 controls the milk supply module 300 to start operation, generating a positive driving force from the liquid inlet port 210 to the liquid outlet port 220 within the delivery pipeline 200. At this time, the liquid inlet port 210 of the delivery pipeline 200 and the storage container 100 remain in communication, allowing the driving force of the milk supply module 300 to transport the milk in the storage container 100 through the delivery pipeline 200 to the liquid outlet port 220.

When the storage container 100 is as shown in FIG5 and only includes the milk tank 110, the milk stored in the milk tank 110 constitutes the milk source. In this case, the above step S100 specifically includes:

Step S110 : upon receiving the beverage preparation start instruction, the milk supply module 300 is controlled to operate so as to connect the milk in the milk tank 110 to the delivery pipeline 200 through the liquid inlet port 210 and deliver the milk in the milk tank 110 forward to be discharged through the liquid outlet port 220 .

Specifically, the control device 700 controls the on-off valve 320 to open. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the first valve 421 and the second valve 431 to close. In the embodiment shown in Figure 4, the control device 700 also controls the third valve 441 to open. The control device 700 also controls the discharge valve 330 to close, stopping the water supply pump 410 and starting the milk supply pump 310. Driven by the milk supply pump 310, milk flows directly from the milk tank 110 into the delivery pipeline 200, as shown in Figure 5, and is ultimately discharged out of the liquid outlet 220.

When the storage container 100 is as shown in FIG6 to FIG8 , and includes a milk tank 110 and a liquid storage structure, the milk stored in the milk tank 110 constitutes a milk source, and the milk tank 110 and the liquid storage structure are respectively connected to the liquid inlet port 210. In this case, the above step S100 specifically includes:

Step S120 : upon receiving the beverage preparation start instruction, the milk supply module 300 is controlled to operate so as to connect the milk in the milk tank 110 to the delivery pipeline 200 through the liquid inlet port 210 and deliver the milk in the milk tank 110 forward to be discharged through the liquid outlet port 220 .

Specifically, the control device 700 controls the on-off valve 320 to open. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the first valve 421 and the second valve 431 to close. In the embodiment shown in Figure 4, the control device 700 also controls the third valve 441 to open. The control device 700 also controls the discharge valve 330 to close, stopping the water supply pump 410 and restarting the milk supply pump 310. Driven by the milk supply pump 310, in the embodiment shown in Figure 6, the milk in the milking tank 110 flows through the connecting pipe 121 and is then connected to the delivery pipe 200. In the embodiment shown in Figures 7 and 8, the connection between the bypass branch 122 and the delivery pipe 200 is closed, for example, by a valve, and the milk in the milking tank 110 is directly connected to the delivery pipe 200.

Step S200 : upon receiving the beverage preparation completion instruction, controlling the power module to operate so as to push at least a portion of the milk in the delivery pipeline 200 in reverse direction into the storage container 100 .

In this embodiment, the beverage preparation completion instruction can be manually input by the user as described above, or can be detected by a preset detection device, automatically triggered after a preset time period, etc.

When the beverage preparation is completed, the milk tank 110 no longer provides milk to the delivery pipeline 200, but a certain amount of milk is likely to remain in the delivery pipeline 200. At this time, by controlling the operation of the power module, a reverse driving force is formed in the delivery pipeline 200 from the liquid outlet port 220 to the liquid inlet port 210, driving the milk remaining in the delivery pipeline 200 to be reversely delivered to the storage container 100. On the one hand, it helps to clean the milk remaining in the pipe section of the delivery pipeline 200 to avoid the residual milk from deteriorating in the delivery pipeline 200; on the other hand, it can concentrate the residual milk in the storage container 100, so that the storage conditions of the storage container 100 can be reasonably utilized to keep the residual milk relatively better fresh.

First, it should be noted that in this design, the specific scheme of the power module is not limited, which makes the control of the power module operation in step S200 have different manifestations:

In one embodiment, the power module includes a piston member that can reciprocate on the delivery pipeline 200 and a power device for driving the piston member. In this case, the operation of controlling the power module in step S200 specifically includes:

Step S201 : controlling the power device to drive the piston to move in the reverse direction in the delivery pipeline 200 .

In this embodiment, in the initial state, for example, during forward delivery of the delivery pipeline 200, the piston member is located in the section of the delivery pipeline 200 other than the section between the liquid inlet port 210 and the liquid outlet port 220. Specifically, when it is necessary to remove milk remaining in the entire section of the delivery pipeline 200 from the liquid inlet port 210 to the liquid outlet port 220, the liquid outlet port 220 can be provided on the sidewall of the delivery pipeline 200. The delivery pipeline 200 can further extend away from the liquid inlet port 210 to form an extended section, with the piston member located in the extended section. This prevents the piston member from interfering with the forward delivery of milk in the section from the liquid inlet port 210 to the liquid outlet port 220. When only a partial section of the delivery pipeline 200 near the liquid inlet port 210 is required for milk withdrawal, the piston can be positioned in the remaining section beyond this partial section, and the placement of the piston in this remaining section will not interfere with the forward flow of the delivery pipeline 200. This can be achieved, for example, by making the diameter of the remaining section larger than that of the partial section, or by elastically reducing the outer diameter of the piston in the remaining section. Upon receiving a beverage preparation completion instruction, the power device provides a linear driving force to the piston, driving it to move in the reverse direction along the delivery pipeline 200, thereby pushing the remaining milk in the delivery pipeline 200 into the storage container 100.

In one embodiment, the power module includes an airflow driving device; in this case, controlling the operation of the power module in step S200 specifically includes:

Step S202 : controlling the air flow driving device to operate so that the air pressure in the delivery pipeline 200 near the liquid outlet port 220 is greater than the air pressure near the liquid inlet port 210 .

In this embodiment, the air flow driver can act near the liquid outlet port 220 to blow the air flow from the liquid outlet port 220 to the storage container 100; or the air flow driver can act near the liquid inlet port 210 to suck the air flow near the liquid inlet port 210, so that a negative pressure is formed near the liquid inlet port 210.

Furthermore, the airflow actuator can be configured to generate airflows of varying temperatures. For example, in one application, the control device 700 can first control the airflow actuator to generate a lower-temperature airflow. This lower-temperature airflow can help preserve the freshness of the milk remaining in the delivery pipeline 200 while returning it to the storage container 100. The control device 700 can then control the airflow actuator to generate a higher-temperature airflow. This allows the higher-temperature airflow to sterilize the delivery pipeline 200 after returning the remaining milk to the storage container 100.

And/or further, the airflow driver can be configured to generate airflows of varying humidity. For example, in one application, the control device 700 can first control the airflow driver to generate an airflow with lower humidity, thereby reducing dilution of the milk remaining in the delivery pipeline 200 during the process of returning the milk to the storage container 100 through the relatively dry airflow. The control device 700 can then control the airflow driver to generate an airflow with higher humidity, thereby cleaning the delivery pipeline 200 through the relatively moist airflow after the milk remaining in the delivery pipeline 200 is returned to the storage container 100.

In one embodiment, the milk supply system 1 further includes a water supply module 400, which constitutes a power module. In this case, controlling the operation of the power module in step S200 specifically includes:

Step S203: Control the water supply module 400 to connect the external clean water into the delivery pipeline 200 and deliver it in the reverse direction.

In this embodiment, the water supply module 400 can adjust the flow direction of clean water in the delivery pipeline 200 by, for example, switching between various flow paths in a multi-way valve. The clean water can reversely transport the residual milk in the delivery pipeline 200 until the residual milk is completely returned to the storage container 100.

Specifically, take the water supply module 400 as an example to constitute the power module:

When the storage container 100 only includes the milk tank 110 as shown in FIG5 , the milk stored in the milk tank 110 constitutes the milk source. In this case, the above step S200 specifically includes:

Step S210 : upon receiving the beverage preparation completion instruction, controlling the power module to operate so as to push at least a portion of the milk in the delivery pipeline 200 back into the milk tank 110 .

Specifically, the control device 700 controls the on-off valve 320 to close and the milk supply pump 310 to stop. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the first valve 421 to open and the second valve 431 to close. In the embodiment shown in Figure 4, the control device 700 also controls the third valve 441 to open. The control device 700 also controls the water supply pump 410 to start. Driven by the water supply pump 410, milk is directly returned from the delivery pipeline 200 to the milk tank 110, as shown in Figure 5.

When the storage container 100 includes a milk tank 110 and a liquid storage structure as shown in FIG6 to FIG8 , the milk stored in the milk tank 110 constitutes a milk source, and the milk tank 110 and the liquid storage structure are respectively connected to the liquid inlet port 210. In this case, the above step S200 specifically includes:

Step S220: upon receiving the beverage preparation completion instruction, controlling the power module to operate so as to push at least a portion of the milk in the delivery pipeline 200 back into the liquid storage structure.

Specifically, the control device 700 controls the on-off valve body 320 to close and the milk supply pump body 310 to stop operating. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the first valve body 421 to open and the second valve body 431 to close; in the embodiment shown in Figure 4, the control device 700 also controls the third valve body 441 to open. The control device 700 also controls the water supply pump body 410 to start operating. Driven by the water supply pump body 410, as shown in the embodiment of Figure 6, the milk in the delivery pipeline 200 is returned to the connecting pipeline 121; in the embodiment shown in Figures 7 and 8, the milk in the delivery pipeline 200 is returned to the bypass branch 122 or the first waste pipe 124.

It should be noted that when the clean water is used to push the residual milk into the storage container 100 in reverse, there will be a certain degree of fusion between the clean water and the residual milk. However, in order to reduce the amount of clean water entering the storage container 100 as much as possible, the water supply module 400 needs to make the clean water push the residual milk into the storage container 100 as much as possible, and the clean water just stays at the milk withdrawal end point without entering the storage container 100.

Therefore, in one embodiment, the above step S202 specifically includes:

Step S2021: Obtain target water supply;

Step S2022: Control the water supply module 400 to connect the external clean water into the delivery pipeline 200 according to the target water supply volume and deliver it in the reverse direction.

In this embodiment, the control device 700 first determines a target water supply volume, which is the amount of water supplied so that the clean water level in the delivery pipeline 200 reaches the aforementioned milk withdrawal termination point. Thus, when the control device 700 controls the water supply module 400 to start operation, the clean water supplied by the water supply module 400 pushes the remaining milk in the delivery pipeline 200 back into the storage container 100. The clean water remains at the milk withdrawal termination point and does not enter the storage container 100, thereby preventing dilution or contamination of the milk contained in the liquid storage structure.

There are several methods for obtaining the target water supply in step S2021:

In one embodiment, the target water supply volume can be determined through pre-testing. For example, before the beverage preparation mode is activated, the water supply module 400 is controlled to start operation, steadily supplying clean water to the delivery pipeline 200, so that the liquid level in the delivery pipeline 200 gradually reaches the milk withdrawal end point. If the liquid level at the milk withdrawal end point is visually displayed, the user can determine whether the liquid level has been reached by observing whether there is water at the milk withdrawal end point. When the liquid level reaches the target water supply volume, the operating time of the water supply module 400 is recorded as the operating time corresponding to the target water supply volume. Subsequently, when the entire machine is in the beverage preparation mode, the water supply module 400 is simply controlled to operate according to this operating time.

Alternatively, in one embodiment, step S2021 specifically includes:

Step S2021a: obtaining the structure and/or flow rate information of the pipe section of the delivery pipeline 200 between the clean water access position and the liquid inlet port 210;

Step S2021b: Calculate the target water supply according to the structure and/or flow information.

In this embodiment, structural information includes pipe length and diameter; flow information includes flow velocity and direction. By measuring the length and diameter of the pipe section between the milk withdrawal end point and the liquid outlet port 220, the volume of the pipe section of the delivery pipeline 200 between the milk withdrawal end point and the liquid outlet port 220 can be generally determined, thereby generally determining the target water supply volume.

When the positions of the liquid inlet port 210, the liquid outlet port 220, and the milk withdrawal termination point on the delivery pipeline 200 remain fixed, the structural parameters can be measured, for example, by directly measuring the delivery pipeline 200 when it is not installed, or by querying the structural design parameters of the delivery pipeline 200.

Alternatively, in one embodiment, the milk supply system 1 further comprises a sensor device, which triggers a first message when it senses water and triggers a second message when it senses milk. In this case, the above step S2021 specifically includes:

Step S2021c: Control the water supply module 400 to operate so as to connect the external clean water into the delivery pipeline 200 and deliver it in the reverse direction:

Step S2021d: When it is determined that the sensor device triggers the first information, the water supply module 400 is controlled to stop running immediately or to stop running with a delay.

In this embodiment, the control device 700 first controls the water supply module 400 to start operation and continuously deliver clean water to the delivery pipeline 200. The clean water gradually pushes the remaining milk in the delivery pipeline 200 toward the milk withdrawal termination point through the liquid outlet port 220. During this process, the sensor first senses the milk and triggers a second message. Upon receiving the second message, the control device 700 determines that the water currently flowing through the milk withdrawal termination point is still milk, and the water supply module 400 can continue to deliver clean water. The sensor then senses the clean water and triggers a first message. Upon receiving the first message, the control device 700 determines that the clean water has reached the milk withdrawal termination point, and the water supply module 400 stops delivering clean water and ceases operation. This ensures that clean water essentially does not enter the storage container 100.

Based on any of the above embodiments, further, when the milk supply system 1 further includes a water supply module 400, after the above step S200, it further includes:

Step S300 : Control the water supply module 400 to connect external clean water into the delivery pipeline 200 and deliver it forward toward the liquid outlet port 220 .

In this embodiment, when it is determined that the milk remaining in the delivery pipeline 200 is pushed back to the storage container 100, the control device 700 can switch the direction of the water supply module 400 to access the clean water, so that the clean water is delivered toward the liquid outlet port 220, thereby cleaning the delivery pipeline 200.

Specifically, the control device 700 controls the on-off valve body 320 to open. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the second valve body 431 to open and the first valve body 421 to close. The control device 700 also controls the milk supply pump body 310 and/or the water supply pump body 410 to start operation to provide positive driving force for the second water supply pipeline 430. In the embodiment shown in Figure 4, the control device 700 also controls the third valve body 441 to close. The control device 700 also controls the milk supply pump body 310 and/or the water supply pump body 410 to start operation to provide positive driving force for the third water supply pipeline 440. In this way, clean water from the water source 450 can be pumped through the delivery pipeline 200 to clean the delivery pipeline 200.

It should be noted that, when a second waste pipe 600 is provided, step S300 may specifically include:

Step S310: controlling the second waste pipe 600 to connect to the delivery pipe 200, and controlling the milk supply module 300 to forwardly deliver the milk in the milk tank 110 and/or the liquid storage structure toward the second waste pipe 600;

Step S320 : controlling the second waste pipe 600 to disconnect from the delivery pipe 200 , and controlling the milk supply module 300 to forwardly deliver the milk in the milk tank 110 and/or the liquid storage structure toward the liquid outlet port 220 .

In this embodiment, the connection and disconnection between the delivery pipeline 200 and the second waste pipe 600 can be achieved by controlling the opening and closing of the discharge valve body 330, thereby selecting whether the clean water transported in the delivery pipeline 200 is ultimately discharged from the liquid outlet port 220 or from the second waste pipe 600. It will be understood that when the clean water is ultimately discharged from the liquid outlet port 220, the liquid outlet port 220 can be cleaned; when the clean water is ultimately discharged from the second waste pipe 600, it does not pass through the liquid outlet port 220. Therefore, the frequency of clean water being discharged from the liquid outlet port 220 and from the second waste pipe 600 can be adjusted according to actual application requirements. For example, after being discharged from the second waste pipe 600 multiple times, the clean water can be adjusted to be discharged from the liquid outlet port 220 once, and so on, in an alternating manner.

In addition, when the storage container 100 includes a milk tank 110 and a liquid storage structure, and the storage effect of the liquid storage structure on the milk is not significantly better than the storage effect of the delivery pipeline 200 on the milk, the above step S100 and/or after the above step 200 (after step S300 if there is one) further includes:

Step S400: upon receiving a beverage preparation start instruction, controlling the water supply module 400 to connect external clean water into the delivery pipeline 200 and deliver it forward toward the liquid outlet port 220;

Step S510: obtaining status information of the milk in the liquid storage structure;

Step S520 : When the status information meets the preset conditions, the milk supply module 300 is controlled to forwardly transport the milk in the milk tank 110 and/or the liquid storage structure toward the liquid outlet port 220 .

In this embodiment, when the control device 700 receives a drink preparation start command again, i.e., when the entire machine enters the drink preparation mode again, steps S100 to S200 are looped. Therefore, in step S100 and/or after step 200 (or after step S300 if present), the control device 700 first controls the water supply module 400 to start operation, flushing the delivery pipeline 200 by connecting clean water to the pipeline and delivering it in a forward direction, thereby ensuring that the pipeline 200 is relatively clean.

The quality of the milk stored in the liquid storage structure is then verified to obtain status information. The method for verifying the status information is not limited and can be associated with the storage conditions of the milk in the liquid storage structure. For example, the status information includes the storage temperature, storage volume, and storage duration of the milk in the liquid storage structure.

When the status information satisfies a preset condition, such as a suitable storage temperature that ensures that the milk will not deteriorate, or a short storage time that ensures that the milk will not deteriorate, the milk in the liquid storage structure can be reused for preparing the current drink. Therefore, the milk supply module 300 can obtain milk from the milk tank 110 and/or the liquid storage structure.

When the status information does not meet the preset conditions, such as when the storage temperature is unsuitable and may cause the milk to deteriorate, or when the storage time is long and may cause the milk to deteriorate, the milk in the liquid storage structure cannot be reused. Therefore, the milk supply module 300 can obtain milk from the milk tank 110. The milk in the liquid storage structure can be discharged through the second waste pipe 600.

In addition, based on any of the above embodiments, when the storage container 100 only includes the milk tank 110, or when the storage container 100 includes the milk tank 110 and the liquid storage structure, and the storage effect of the liquid storage structure on milk is significantly better than that of the delivery pipeline 200 (for example, when the milk supply system 1 includes the fresh-keeping device 500, and the milk tank 110 and the liquid storage structure are both accommodated in the fresh-keeping device 500), the above step S100 and/or after the above step 200 (after step S300 if there is step S300) further includes:

Step S400: upon receiving a beverage preparation start instruction, controlling the water supply module 400 to connect external clean water into the delivery pipeline 200 and deliver it forward toward the liquid outlet port 220;

Step S600 : controlling the milk supply module 300 to forwardly transport the milk in the milk tank 110 and/or the liquid storage structure toward the liquid outlet port 220 .

In this embodiment, when the control device 700 receives a drink preparation start command again, i.e., when the entire machine enters the drink preparation mode again, steps S100 to S200 are looped. Therefore, in step S100 and/or after step 200 (or after step S300 if present), the control device 700 first controls the water supply module 400 to start operation, flushing the delivery pipeline 200 by connecting clean water to the pipeline and delivering it in a forward direction, thereby ensuring that the pipeline 200 is relatively clean.

Then, since the preservation device 500 continuously preserves the milk in the milk tank 110 and the liquid storage structure, ensuring that the milk in the liquid storage structure is in a high-quality state and can be used a second time for preparing the beverage, the milk supply module 300 can obtain milk from the milk tank 110 and/or the liquid storage structure.

Specifically, step S400 may be as follows: the control device 700 controls the switch valve body 320 to open. In the embodiment shown in Figures 2 and 3, the control device 700 also controls the second valve body 431 to open and the first valve body 421 to close. The control device 700 also controls the milk supply pump body 310 and/or the water supply pump body 410 to start operation to provide a positive driving force for the second water supply pipeline 430. In the embodiment shown in Figure 4, the control device 700 also controls the third valve body 441 to close. The control device 700 also controls the milk supply pump body 310 and/or the water supply pump body 410 to start operation to provide a positive driving force for the third water supply pipeline 440. In this way, clean water from the water source 450 can be pumped through the delivery pipeline 200 to clean the delivery pipeline 200.

In addition, it should be noted that when a second waste pipe 600 is provided, step S400 may specifically include:

Step S410: controlling the second waste pipe 600 to connect to the delivery pipe 200, and controlling the milk supply module 300 to forwardly deliver the milk in the milk tank 110 and/or the liquid storage structure toward the second waste pipe 600;

Step S420 : controlling the second waste pipe 600 to disconnect from the delivery pipe 200 , and controlling the milk supply module 300 to forwardly deliver the milk in the milk tank 110 and/or the liquid storage structure toward the liquid outlet port 220 .

In this embodiment, the connection and disconnection between the delivery pipeline 200 and the second waste pipe 600 can be achieved by controlling the opening and closing of the discharge valve body 330, thereby selecting whether the clean water transported in the delivery pipeline 200 is ultimately discharged from the liquid outlet port 220 or from the second waste pipe 600. It will be understood that when the clean water is ultimately discharged from the liquid outlet port 220, the liquid outlet port 220 can be cleaned; when the clean water is ultimately discharged from the second waste pipe 600, it does not pass through the liquid outlet port 220. Therefore, the frequency of clean water being discharged from the liquid outlet port 220 and from the second waste pipe 600 can be adjusted according to actual application requirements. For example, after being discharged from the second waste pipe 600 multiple times, the clean water can be adjusted to be discharged from the liquid outlet port 220 once, and so on, in an alternating manner.

In addition, in the above steps S520/S600 (taking step S600 as an example), the step of controlling the milk supply module 300 to forwardly transport the milk in the milk tank 110 and/or the liquid storage structure toward the liquid outlet port 220 may specifically be:

Step S610: Controlling the milk supply module 300 to forwardly transport the milk in the liquid storage structure toward the liquid outlet port 220;

Step S620 : controlling the milk supply module 300 to forwardly transport the milk in the milk tank 110 toward the liquid outlet port 220 .

In this embodiment, when the milk returned to the storage container 100 (the milk tank 110 or the liquid storage structure) via the delivery pipeline 200 can be reused, step S610 is first performed, so that the recovered milk can first be used for pre-circulation of the milk in the delivery pipeline 200, thereby helping to completely push out the clean water remaining in the delivery pipeline 200 after cleaning in step S400 (for example, discharge it as waste liquid via the second waste pipe 600 or the liquid outlet port 220), or after absorption, step 620 is performed to provide fresher and more sufficient milk to the liquid outlet port 220 via the milk tank 110.

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

Claims (29)

A control method for a beverage preparation device, characterized in that the beverage preparation device includes a milk supply system, the milk supply system includes a storage container, a delivery pipeline, a milk supply module, and a power module, the delivery pipeline is provided with a liquid inlet port and a liquid outlet port, the liquid inlet port is connected to the storage container; the control method for the beverage preparation device includes: Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and deliver the milk in the storage container in a forward direction to be discharged through the liquid outlet port; When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the storage container in reverse. The control method of the beverage preparation device according to claim 1 is characterized in that the storage container includes a milk tank, the milk tank is used to store milk and is connected to the liquid inlet port; the control method of the beverage preparation device includes: Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the milk tank from the liquid inlet port to the delivery pipeline and deliver the milk in the milk tank in a forward direction to be discharged through the liquid outlet port; When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the milk tank in reverse. The control method of the beverage preparation device according to claim 1 is characterized in that the storage container includes a milk tank and a liquid storage structure, the milk tank is used to store a milk source, and the milk tank and the liquid storage structure are respectively connected to the liquid inlet port; the control method of the beverage preparation device includes: Upon receiving a beverage preparation start instruction, controlling the milk supply module to operate so as to connect the milk in the milk tank from the liquid inlet port to the delivery pipeline and deliver the milk in the milk tank in a forward direction to be discharged through the liquid outlet port; When a beverage preparation completion instruction is received, the power module is controlled to operate so as to push at least part of the milk in the delivery pipeline into the liquid storage structure in reverse. The control method of the beverage preparation device according to claim 3 is characterized in that the liquid storage structure includes a connecting pipe, and the connecting pipe is connected between the milk tank and the liquid inlet port. The control method of the beverage preparation device according to claim 4 is characterized in that the connecting pipeline and the delivery pipeline can be provided as an integral part or can be provided as separate parts and then plugged together. The control method of the beverage preparation device according to claim 3 is characterized in that the liquid storage structure includes a bypass branch, and the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port. The control method of the beverage preparation device according to claim 6, characterized in that the liquid storage structure further includes a collection container, and the collection container is connected to the bypass branch; or The milk supply system further includes a first waste pipe, which constitutes the bypass branch, or is connected to the bypass branch. The control method of the beverage preparation device according to claim 3 is characterized in that the liquid storage structure and at least a portion of the delivery pipeline are respectively arranged in different accommodating spaces. The control method of the beverage preparation device according to claim 8, wherein the temperature of the liquid storage structure in the corresponding accommodating space is lower than the temperature of the delivery pipeline in the corresponding accommodating space. The control method of the beverage preparation device according to any one of claims 1 to 9, characterized in that the power module includes a piston member that can reciprocate on the delivery pipeline, and a power device for driving the piston member; and the step of controlling the operation of the power module includes: The power device is controlled to drive the piston member to move in the reverse direction in the delivery pipeline. The control method of the beverage preparation device according to any one of claims 1 to 9, wherein the power module includes an airflow drive device; and the step of controlling the operation of the power module comprises: The air flow driving device is controlled to operate so that the air pressure in the delivery pipeline near the liquid outlet port is greater than the air pressure near the liquid inlet port. The control method of the beverage preparation device according to any one of claims 1 to 9, characterized in that the milk supply system further includes a water supply module, the water supply module constitutes the power module; and the step of controlling the operation of the power module comprises: The water supply module is controlled to connect external clean water to the delivery pipeline and deliver it in the reverse direction. The control method of the beverage preparation device according to claim 12 is characterized in that the step of controlling the water supply module to connect external clean water to the delivery pipeline and deliver it in the reverse direction comprises: Obtain target water supply; The water supply module is controlled to connect external clean water into the delivery pipeline and deliver it in the reverse direction according to the target water supply volume. The control method of the beverage preparation device according to claim 13, wherein the step of obtaining the target water supply volume comprises: Acquiring structure and/or flow information of the pipe section of the delivery pipeline between the clean water access position and the liquid inlet port; Calculate the target water supply volume according to the structure and/or flow information. The control method for a beverage preparation device according to claim 12 is characterized in that the milk supply system further includes a sensor device, and the sensor device triggers a first signal when sensing clean water; and the step of controlling the water supply module to connect external clean water to the delivery pipeline and deliver it in the reverse direction comprises: Control the operation of the water supply module to connect external clean water to the delivery pipeline and deliver it in the reverse direction: When it is determined that the sensor device triggers the first information, the water supply module is controlled to stop running immediately or stop running with a delay. The control method of the beverage preparation device according to claim 15, wherein the sensor device is arranged in the delivery pipeline; and/or, The storage container includes a milk tank and a connecting pipeline, the connecting pipeline is connected between the milk tank and the liquid inlet port, and the sensor is arranged at any section of the delivery pipeline and the connecting pipeline or at the interface where the two are connected; and/or, The storage container includes a milk tank and a bypass branch, the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port, and the sensor device is provided at any section of the delivery pipeline and the bypass branch or at the interface connected to each other. The control method of the beverage preparation device according to claim 1, characterized in that the milk supply system further includes a water supply module; after the step of controlling the power module to operate to reversely push at least part of the milk in the delivery pipeline into the storage container upon receiving the beverage preparation completion instruction, the method further includes: The water supply module is controlled to connect external clean water into the delivery pipeline and deliver it in a positive direction toward the liquid outlet port. The control method of the beverage preparation device according to claim 3 is characterized in that the milk supply system further includes a water supply module; after the step of controlling the milk supply module to operate upon receiving a beverage preparation start instruction so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and forwardly deliver it to be discharged through the liquid outlet port, and/or the step of controlling the power module to operate upon receiving a beverage preparation completion instruction so as to reversely push at least part of the milk in the delivery pipeline into the storage container, the method further includes: Upon receiving a beverage preparation start instruction, controlling the water supply module to connect external clean water into the delivery pipeline and deliver it forwardly toward the liquid outlet port; Acquiring status information of the milk in the liquid storage structure; When the status information meets a preset condition, the milk supply module is controlled to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port. The control method of the beverage preparation device according to claim 3 is characterized in that the milk supply system further includes a water supply module and a fresh-keeping device, and after the step of controlling the milk supply module to operate upon receiving a beverage preparation start instruction so as to connect the milk in the storage container from the liquid inlet port to the delivery pipeline and forwardly deliver it to be discharged through the liquid outlet port, and/or controlling the power module to operate upon receiving a beverage preparation completion instruction so as to reversely push at least part of the milk in the delivery pipeline into the storage container, the method further includes: Upon receiving a beverage preparation start instruction, controlling the water supply module to connect external clean water into the delivery pipeline and deliver it forwardly toward the liquid outlet port; The milk supply module is controlled to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port. The control method of the beverage preparation device according to claim 18 or 19, characterized in that the step of controlling the milk supply module to forwardly transport the milk in the milk tank and/or the liquid storage structure toward the liquid outlet port comprises: Controlling the milk supply module to forwardly transport the milk in the liquid storage structure toward the liquid outlet port; The milk supply module is controlled to forwardly transport the milk in the milk tank toward the liquid outlet port. The control method of the beverage preparation device according to any one of claims 17 to 19 is characterized in that the milk supply system further includes a second waste discharge pipe, the second waste discharge pipe being connectably connected to the delivery pipe at a pipe section between the liquid inlet port and the liquid outlet port, and the step of controlling the water supply module to connect external clean water to the delivery pipe and deliver it forwardly toward the liquid outlet port comprises: After controlling the second waste pipe to be connected to the delivery pipe, controlling the water supply module to connect external clean water to the delivery pipe and discharge it through the second waste pipe; or, After controlling the second waste pipe to disconnect from the delivery pipe, controlling the water supply module to connect external clean water into the delivery pipe and discharge it through the liquid outlet port. A beverage preparation device, comprising: body; A milk supply system includes a storage container, a delivery pipeline, a milk supply module, and a power module. The delivery pipeline is provided with a liquid inlet port and a liquid outlet port, and the liquid inlet port is connected to the storage container; and A control device electrically connected to the milk supply module and the power module, the control device including a memory, a processor, and a control program for the beverage preparation device stored in the memory and executable on the processor, the control program for the beverage preparation device being configured to implement the steps of the control method for the beverage preparation device as described in any one of claims 1 to 21. The beverage preparation device according to claim 22, wherein the storage container comprises a milk tank, the milk tank is used to store milk and is connected to the liquid inlet port; or The storage container comprises a milk tank and a liquid storage structure. The milk tank is used to store a milk source. The milk tank and the liquid storage structure are respectively connected to the liquid inlet port. The liquid storage structure is used to store milk returned through the delivery pipeline. The beverage preparation device according to claim 23, wherein the liquid storage structure comprises a connecting pipe, the connecting pipe being communicatively connected between the milk tank and the liquid inlet port; and/or, The liquid storage structure includes a bypass branch, and the milk tank and the bypass branch are independently provided and are respectively connected to the liquid inlet port. The beverage preparation device according to claim 22, wherein the power module comprises a piston member that can reciprocate on the delivery pipeline, and a power device for driving the piston member to move; and/or, The power module includes an airflow driving device; and/or, The milk supply system further comprises a water supply module, and the water supply module constitutes the power module. The beverage preparation device according to claim 23 is characterized in that the milk supply system further includes a fresh-keeping device, and the milk tank and/or the liquid storage structure are accommodated in the fresh-keeping device. A storage medium, characterized in that a control program for a beverage preparation device is stored on the storage medium, and when the control program for the beverage preparation device is executed by a processor, the steps of the control method for the beverage preparation device according to any one of claims 1 to 21 are implemented. A beverage preparation device, characterized in that the beverage preparation device includes a milk supply system, the milk supply system includes a storage container, a delivery pipeline, a milk supply module and a power module, the milk supply module is arranged on the path of the delivery pipeline for sucking liquid from the storage container, the delivery pipeline and/or the pipeline of the power module are provided with a control valve, wherein the control valve can switchably control so that the power module is connected to the liquid inlet port and/or the liquid outlet port respectively, and the time for connecting to the liquid inlet port is shorter than the time for connecting to the liquid outlet port. The beverage preparation device according to claim 28, wherein the control valve is activated to simultaneously connect the power module and the liquid inlet port, and to connect the power module and the liquid outlet port; or The power module is only connected to any one of the liquid inlet port and the liquid outlet port in the same time period.