A milk-adulteration-preventing beverage preparation device

Abstract

The utility model provides a kind of anti-mixing milk beverage preparation equipment, including coffee machine and the milk supply equipment of connecting coffee machine, milk supply equipment includes milk storage device and the milk supply pipeline of connecting milk storage device, milk supply pipeline includes first multi-way connector, at least two milk supply branch, public pipeline and vent pipeline;First multi-way connector has input and output;The output of milk supply branch and the output of vent pipeline are respectively connected with the input of first multi-way connector, air controller configured to vent into air to public pipeline is equipped on vent pipeline;Milk storage device includes at least two milk source box, milk source box and branch control valve are connected on each milk supply branch;The input of public pipeline connects the output of first multi-way connector, and the output of public pipeline is connected coffee machine by public road control valve.Clarify the milk in public pipeline by air controller and vent into air to public pipeline, avoid mixing milk phenomenon, improve the taste and quality of beverage equipment to make beverage.

Description

Technical Field

[0001] This utility model relates to the field of beverage machine technology, and in particular to a device for preparing milk beverages that prevents mixing. Background Technology

[0002] When using the multi-milk function in a coffee machine connected to a multi-milk refrigerator, milk can be pumped from different milk tanks in the refrigerator to make milk-containing beverages. However, since the coffee machine's piping system is connected to multiple branches of the multi-milk refrigerator through only one common milk pipe, when switching between different types of milk (such as milk): for example, if milk A is used first and then milk B is made, if the milk A remaining in the piping between the coffee machine and the refrigerator is not emptied, the remaining milk A will mix with milk B, resulting in milk mixing. This will affect the quality and taste of the milk-containing beverages made by the beverage equipment. In addition, even when the milk is not switched, there is a risk that the milk in the common milk pipe may flow back to other milk tanks after making a milk-containing beverage or pure milk, causing milk mixing. Utility Model Content

[0003] The technical problem to be solved by this utility model embodiment is to provide a milk-preparation device that prevents milk mixing. Before the coffee machine finishes making milk, air is introduced into the common pipeline through an air controller to clear the milk in the common pipeline and avoid milk mixing.

[0004] To solve the above-mentioned technical problems, this utility model provides a milk-preparation device for preventing milk mixing, including a coffee machine and a milk supply device connected to the coffee machine. The milk supply device includes a milk storage container and a milk supply pipeline connected to the milk storage container. The milk supply pipeline includes a first multi-port connector, at least two milk supply branches, a common pipeline, and a venting pipeline. The first multi-port connector has an input end and an output end. The output end of each milk supply branch and the output end of the venting pipe are respectively connected to the input end of the first multi-port connector. An air controller is provided on the venting pipe. The air controller is configured to selectively open or close to control the air supply to the common pipe. The milk storage device includes at least two milk source tanks, and each of the milk supply branches is connected to the milk source tank and a branch control valve that controls the on / off state of the milk supply branch; The input end of the common pipeline is connected to the output end of the first multi-port connector, and the output end of the common pipeline is connected to the coffee machine through a common pipeline control valve.

[0005] In one feasible implementation, the air controller includes an air pump, an air valve or a pinch valve, and both the branch control valve and the common control valve include pinch valves or milk valves.

[0006] In one feasible implementation, the clamping valves are all electromagnetic clamping valves, which, when energized, can clamp the milk supply branch to interrupt the flow of milk.

[0007] In one feasible implementation, the ventilation line is further provided with a one-way valve, which is located on the input or output side of the air controller. The one-way valve is used to prevent milk from entering the ventilation line.

[0008] In one feasible implementation, the one-way valve is located on the input side of the air controller, and the one-way valve is a diaphragm one-way valve.

[0009] In one feasible implementation, the milk supply equipment further includes a conveying mechanism located above the milk storage unit. The conveying mechanism is provided with the milk supply pipeline, and at least two connection holes are provided at the bottom of the conveying mechanism. The input end of each milk supply branch passes through the corresponding connection hole and connects to the milk storage unit.

[0010] In one feasible implementation, the coffee machine includes a second multi-port connector and a milk frother connected to the output of the second multi-port connector, the milk frother being configured to use steam to generate negative pressure to draw milk from the milk reservoir.

[0011] In one feasible implementation, the coffee machine also includes a coffee machine gas valve and a water supply solenoid valve; The output terminals of the public road control valve, the coffee machine gas valve, and the water supply solenoid valve are respectively connected to the input terminal of the second multi-port connector.

[0012] In one feasible implementation, the coffee machine includes a milk pump and a milk frother connected to the output of the milk pump, the milk pump being configured to draw milk from the milk reservoir.

[0013] In one feasible implementation, the coffee machine also includes a milk cleaning control valve and a water pump; The output end of the common road control valve, the input end of the milk cleaning control valve, and the input end of the water pump are respectively connected to the input end of the milk pump; The milk cleaning control valve is connected to an air vent.

[0014] Implementing this utility model has the following beneficial effects: This utility model discloses a beverage preparation device, including a coffee machine and a milk supply device connected to the coffee machine via a common pipeline. The milk supply device has multiple milk supply branches, and the input end of the multi-port connector at the intersection of the milk supply branches is also connected to an air supply pipeline. The air supply pipeline has an air controller that allows air to enter. Each milk supply branch is connected to a milk source tank that can hold different types of milk, and each branch has a branch control valve that controls the on / off state of the branch. Through the coordinated operation of the branch control valve, the air controller that allows air to enter the air supply pipeline, and the common pipeline control valve connected to the coffee machine via the multi-port connector, air can be introduced into the common pipeline through the air controller before the coffee machine finishes making milk, thus clearing the milk in the common pipeline, avoiding milk mixing, and improving the quality and taste of milk-containing beverages.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an anti-mixing milk beverage preparation device according to one embodiment of the present invention; Figure 2 This is a schematic diagram of an anti-mixing milk beverage preparation device according to one embodiment of the present invention; Figure 3 This is a top view of the milk supply device of the coffee machine of this utility model; Figure 4 This is a front view of the milk supply device of the coffee machine of this utility model. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] This application provides a device for preparing a milk-preventing beverage, referring to... Figure 1 , Figure 3 The system includes a coffee machine 200 and a milk supply device 100 connected to the coffee machine 200. The milk supply device 100 includes a milk storage tank 160 and a milk supply pipeline connected to the milk storage tank 160. The milk supply pipeline includes a first multi-port connector 120, at least two milk supply branches, a common pipeline, and a venting pipeline. The first multi-port connector 120 has an input end and an output end; the output end of each milk supply branch and the output end of the air supply line are respectively connected to the input end of the first multi-port connector 120. An air controller 110 is provided on the air supply line. The air controller 110 is configured to selectively open or close to control the air supply to the common line. The milk storage unit 160 includes at least two milk source tanks, and each milk supply branch is connected to a milk source tank and a branch control valve 140 that controls the on / off state of the milk supply branch; The input end of the common pipeline is connected to the output end of the first multi-port connector 120, and the output end of the common pipeline is connected to the coffee machine 200 through the common pipeline control valve 210.

[0021] Specifically, the milk supply equipment 100 is connected to the coffee machine 200 through a common pipeline to supply the required milk to the coffee machine 200. The air controller 110 is configured to introduce air into the common pipeline through the ventilation pipeline. There can be multiple milk supply branches, which are set according to the actual situation. The following is an example of two milk supply branches: Figure 3 The orange line represents the ventilation line and its transmission direction; the green line represents the first milk supply branch and its transmission direction; the blue line represents the second milk supply branch and its transmission direction; and the common line is... Figure 1 The pipeline connecting the first multi-port connector 120 and the coffee machine 200 is in the middle. The first multi-port connector 120 is a four-way connector at this time. Before the first milk supply branch is completed, air is introduced into the common pipeline through the air controller 110 to clear the milk remaining in the common pipeline, so as to facilitate the subsequent delivery of different types of milk by the second milk supply branch, thereby avoiding milk mixing.

[0022] The air controller 110 includes an air valve, an air pump, or a clamp valve. The air pump can actively provide air pressure, while the air valve or clamp valve can passively provide natural air into the common pipeline.

[0023] In this embodiment, the air controller 110 uses an air valve. When the milk making is about to end, all branch control valves 140 are closed, and the air valve is opened to input air into the common pipeline. This allows the milk remaining in the common pipeline to be smoothly drawn to the coffee machine 200 side, thereby emptying the common pipeline and preventing the milk in the common pipeline from flowing back to other milk source tanks after the beverage preparation is completed.

[0024] In some embodiments, both the branch control valve 140 and the common control valve 210 include a pinch valve or a milk valve. The pinch valves are all electromagnetic pinch valves, which can clamp the milk supply branch to interrupt the flow of milk when energized; and release the pipeline when de-energized, allowing the liquid in the pipeline to flow normally. The branch control valve 140 may also be an electromagnetic milk valve that can be used to allow milk to pass through and control the on / off of the milk supply branch.

[0025] More preferably, to prevent milk from entering the airway, see Figure 3 As shown in this embodiment, a one-way valve 130 is also provided on the ventilation line. The one-way valve 130 is located on the input side or output side of the air controller 110. Specifically, the one-way valve 130 is a diaphragm-type one-way valve with one-way conduction characteristics: it only allows air to flow from the air controller 110 to the first multi-port connector 120, preventing milk from flowing back and damaging the air controller 110 on the ventilation line.

[0026] The number of milk supply branches in this application is not limited to two. The specific design and layout of the milk supply branches can be based on the required types of milk. For ease of understanding, the following explanation will continue to use two milk supply branches as an example: (Refer to...) Figure 1 Each of the two milk supply branches is equipped with a branch control valve 140, which is configured to control the opening and closing of the milk supply branch. The branch control valve 140 can be an electromagnetic clamp valve. When the electromagnetic clamp valve is energized, it clamps the pipeline and cuts off the liquid flow in the pipeline. When the power is off, it releases the pipeline, allowing the liquid flow in the pipeline to proceed normally.

[0027] In some embodiments, the branch control valve 140 may also be a milk valve that can be used to pass milk and control the on / off of the milk supply branch in the pipeline, such as an electromagnetic milk valve.

[0028] Combined with reference Figure 3 , Figure 4The milk supply equipment 100 also includes a conveying mechanism 150 located above the milk storage unit 160. The conveying mechanism 150 has milk supply pipes installed inside, and at least two connection holes are provided at its bottom. Each connection hole corresponds to one milk supply pipe, and the input end of each milk supply branch passes through the corresponding connection hole to connect to the milk storage unit 160. The milk storage unit 160 includes at least two milk source tanks. The number of milk source tanks can be set according to the actual needs of the coffee machine 200. Typically, one milk supply branch corresponds to one milk source tank. (Continuing to refer to...) Figure 3 The following explanation will use two milk source boxes as an example. For the convenience of the following description, the milk contained in the first milk source box 161 will be called milk A, and the milk contained in the second milk source box 162 will be called milk B.

[0029] The first milk source box 161 and the second milk source box 162 are arranged side by side at the bottom of the conveying mechanism 150 along the width direction of the conveying mechanism 150. The structure is compact and easy to integrate into the refrigerator. At the same time, it shortens the length of the first milk supply branch and the second milk supply branch, shortens the emptying path, and improves the emptying efficiency. The compact layout facilitates the overall miniaturization of the equipment.

[0030] Continue to refer to Figure 3 , Figure 4 The bottom of the conveying mechanism 150 is provided with a first connecting hole 170 and a second connecting hole 180. The input end of the first milk supply branch extends into the first milk source tank 161 through the first connecting hole 170, and the input end of the second milk supply branch extends into the second milk source tank 162 through the second connecting hole 180. The different connecting holes serve to fix the input ends of the branches, ensuring their stable insertion into the milk in the corresponding milk source tank, preventing pipe displacement due to equipment vibration, and ensuring the reliability of the milk suction process. Simultaneously, they physically isolate the input ends of the two branches, ensuring stable connection between the first and second milk supply branches and their corresponding milk source tanks, preventing milk suction difficulties caused by pipe detachment or misalignment, and preventing cross-mixing of milk between the two branches. In one feasible implementation, refer to... Figure 1 The coffee machine 200 includes a second multi-port connector 230 and a milk frother 220 connected to the output end of the second multi-port connector 230. The milk frother 220 is configured to use steam to generate negative pressure to extract milk from the milk reservoir 160. The coffee machine 200 also includes a coffee machine gas valve 240 and a water supply solenoid valve 250; the outputs of the common line control valve 210, the coffee machine gas valve 240, and the water supply solenoid valve 250 are respectively connected to the input of the second multi-way connector 230. The common line control valve 210 can also be a clamp valve such as a solenoid clamp valve, or a milk valve that can control the on / off state of the common line.

[0031] Continue to refer to Figure 1As indicated by the red arrow, in this embodiment, the target milk box is the second milk source box 162 for storing milk B, specifically achieved through the venturi tube structure in the milk frother 220 to draw milk under negative pressure. The coffee machine 200 is internally connected to the milk frother 220, the common-path control valve 210, the coffee machine gas valve 240, and the water supply solenoid valve 250 via a second multi-way connector 230. The first multi-way connector 120 can be a four-way connector, the second multi-way connector 230 can be a three-way connector, the common-path control valve 210 can be a solenoid clamp valve, and the water supply solenoid valve 250 can be a cold water solenoid valve. The coffee machine 200 uses steam to enter the milk frother 220, and the venturi tube draws milk under negative pressure. The common-path control valve 210 uses electromagnetic force to drive the clamping action: when powered on, it clamps the tube; when powered off, it resets and opens the tube. The action time can be accurate to the millisecond level, strictly following the timing control logic.

[0032] The first milk supply branch is used to transport milk A, and the second milk supply branch is used to transport milk B. The branch control valve 140 can be an electromagnetic clamp valve, which can precisely control the opening and closing of the first milk supply branch. When the second milk supply branch is used, the branch control valve 140 clamps after being energized, cutting off the liquid path in the first milk supply branch and cutting off the flow path of milk A to the first multi-port connector 120. By physically blocking the passage, non-target milk is prevented from entering the common pipeline from the source. Combined with the purging function of the air valve, a double anti-mixing milk protection is formed.

[0033] In one feasible implementation, the conveying mechanism 150 is provided with an output connector 151 on the side near the coffee machine 200. The output connector 151 is a standardized interface that can be adapted to the input interface of the coffee machine 200. Its sealing structure (such as a rubber sealing ring) can prevent milk from leaking during the conveying process, while preventing external air from entering from the connection gap, ensuring that the air introduced by the air valve can effectively push the remaining milk. On the other hand, the design of the output connector 151 facilitates the quick disassembly and maintenance of the milk supply line and the coffee machine 200, while improving the connection sealing.

[0034] In a feasible implementation, refer to Figure 2 , Figure 3 The structure and connection relationship of the milk supply equipment 100 here are related to Figure 1 The milk supply equipment is 100% identical and has the following features: Figure 1 The advantages of each structure are not elaborated here.

[0035] Coffee machine 200 includes milk pump 260 and milk frother 220 connected to the output of milk pump 260. Milk pump 260 is configured to draw milk from milk reservoir 160. The coffee machine 200 also includes a milk cleaning control valve 270 and a water pump on one side; the output end of the common circuit control valve 210, the input end of the milk cleaning control valve 270, and the input end of the water pump are respectively connected to the input end of the milk pump 260; the milk cleaning control valve 270 is connected to an air hole 290.

[0036] Specifically, the milk supply equipment 100 is connected to the coffee machine 200 through a common pipeline to supply the required milk to the coffee machine 200. Before any one of the milk supply branches is finished, air is introduced into the common pipeline through the air controller 110 to clear the milk remaining in the common pipeline, so as to facilitate the subsequent supply of different types of milk to other milk supply branches, thereby avoiding the phenomenon of milk mixing.

[0037] Furthermore, it should be understood that the milk supply equipment 100 is used to preserve and refrigerate the milk products contained in the milk storage tank 160, and it also includes a refrigeration module. Since this application does not directly involve the refrigeration module, this utility model will not elaborate on it.

[0038] Continue to refer to Figure 2 The red arrow indicates that in this embodiment, the target milk tank is the second milk source tank 162, which stores milk B. The water pump 280 and milk cleaning control valve 270 inside the coffee machine 200 are connected to the milk pump 230. The milk cleaning control valve 270 allows air to enter through the vent 290. The common circuit control valve 210 is driven by electromagnetic force to clamp the pipe: it engages and clamps the pipe when powered on, and resets and opens the pipe when powered off. The action time is accurate to the millisecond level, strictly following the timing control logic. In this embodiment, the milk pumping power of the coffee machine 200 comes from the milk pump 260, and the milk frother 220 is used to create milk foam with steam.

[0039] Based on the anti-mixing milk beverage preparation equipment of this application, after the coffee machine 200 has prepared one or more beverages, it performs an emptying process, the emptying process including: Step S100: Monitor the milk output in the currently used milk supply branch; In step S200, when the milk output in the milk supply branch is close to the preset target output, the branch control valves 140 on all milk supply branches are controlled to close all milk supply branches. In step S300, the air controller 110 is controlled to input air into the ventilation pipeline to empty the milk remaining in the common pipeline.

[0040] Specifically, in step S200, when the milk output is close to the preset target output in the current beverage formula, the branch control valves 140 of all milk supply branches are simultaneously closed, that is, the connection between all milk sources and the common pipeline is completely cut off, so that the milk remaining in the pipeline is transported to the coffee machine 200 side by the suction action of the coffee machine to complete the preparation of the milk-containing beverage. In addition, it should be noted that during the preparation of the milk-containing beverage, milk is generally not drawn from two milk source tanks at the same time. That is, during the suction process, only the branch control valve 140 of the currently used milk supply branch is opened, while the branch control valves 140 of other milk supply branches are kept closed. Therefore, in step S200, it is generally sufficient to close only the branch control valve 140 of the currently used milk supply branch to close all milk supply branches.

[0041] In step S300, air is introduced into the venting pipe via the air controller 110. In step S200, air needs to be introduced into the venting pipe simultaneously with or immediately after closing all milk supply branches so that the remaining milk in the common pipe can be smoothly drawn to the coffee machine 200 side.

[0042] Step S300, the step of controlling the air controller 110 to input air into the ventilation pipe to empty the milk remaining in the common pipe, specifically includes: Step S301: During the first preset time period (e.g., within a seconds), keep the common road control valve 210 in the open state and keep all branch control valves 140 in the closed state to input air into the ventilation pipeline.

[0043] Specifically, keeping the common pipeline control valve 210 open allows the milk remaining in the common pipeline and the first multi-port connector 120 to be drawn by the coffee machine and delivered to the milk-based coffee beverage currently being prepared in the coffee machine 200, while simultaneously emptying the common pipeline. The first preset time period can be set to equal the remaining milk output time during the current beverage preparation. The amount of milk that should have been output during this remaining time is equal to or approximately equal to the amount of milk remaining in the common pipeline that can be emptied. This setting emptys the common pipeline while also meeting the milk quantity requirements for the current beverage preparation. The remaining milk output time is equal to the preset target time in the beverage recipe minus the actual output time. The amount of milk remaining in the common pipeline can be obtained through testing.

[0044] Step S301 is followed by: In step S302, during the second time period after the end of the first preset time period (e.g., within a~b seconds), the common road control valve 210 is closed, and the branch control valves 140 on all milk supply branches are opened to open all milk supply branches. At the same time, the input of air into the ventilation pipeline is suspended. Since the common road control valve 210 is closed at this time, the ventilation pipeline stops supplying air and the branches are in a connected state. Therefore, the high-level B milk that was just made and the B milk near the first multi-port connector 120 and other branches will also flow back to the B milk tank.

[0045] In step S303, during the third time period after the end of the second time period (e.g., within b~c seconds), keep the common pipeline control valve 210 closed, keep all the branch control valves 140 on all the milk supply branches open, and control the air controller 110 to input air into the ventilation pipeline; at this time, the common pipeline is closed, all branches are open, and air can only enter each branch to cause the liquid level to return.

[0046] In step S304, after the third time period ends (e.g., after c seconds), the air controller 110 stops supplying air into the ventilation pipeline, and simultaneously opens the common circuit control valve 210. At this time, except for the air controller 110 which is not supplying gas, all other valves are in the open state. If you want to make B milk beverage next, open the branch control valve 140 on the milk supply branch where the B milk source box is located, and close the branch control valves 140 on other branches to make beverage normally.

[0047] Each production cycle involves keeping the common route control valve 210 open, and only opening the branch control valve 140 on the branch where the milk source box currently needs to be used; all other branch control valves 140 are closed. Furthermore, this application does not limit the specific parameter ranges for the second and third time periods; these can be determined through experimental testing based on the actual pipeline conditions (e.g., pipeline inner diameter, length, etc.) and the selection of the air controller.

[0048] In addition, if it is necessary to switch milk, the following switching and cleaning procedures can be followed: In response to the user's choice to switch the milk supply branch or the coffee machine 200 to switch the milk supply branch, before making a beverage after switching the milk supply branch, the common pipeline is first cleaned with the milk in the milk source tank of the switched milk supply branch. That is, the common pipeline is rinsed with the milk in the milk source tank of the milk supply branch to be used, and then the emptying process is carried out according to the steps S100~S300 above. The cleaning process can be selectively triggered based on the user's settings on the human-computer interaction interface of the coffee machine 200. Because cleaning requires wasting a certain amount of milk (e.g., 1 second of milk A needs to be made after switching to milk A), if milk B was used to make the drink first, the common pipe needs to be rinsed with milk A before switching to milk A, so at least 1 second of milk A will be wasted. Therefore, the user can choose whether to perform the cleaning process before emptying the above-mentioned milk when switching milk.

[0049] In this application, the coffee machine 200 is equipped with a milk frother 220 or a milk pump 260 for drawing milk from the milk supply branch. When the common line control valve 210 is open, the coffee machine 200 can draw milk according to control commands for beverage preparation or emptying. Furthermore, it should be noted that the beverage equipment of this application also includes a main controller, which is used to control the coffee machine and milk supply equipment. For example, the main controller controls the opening and closing of the common line control valve 210, the air controller 110, and the branch control valves 140 on each milk supply branch, and also controls beverage preparation.

[0050] This application achieves rapid emptying of residual milk in the pipeline by precisely controlling the coordinated operation of the common road control valve 210, the air controller 110, and the branch control valve 140 in stages, thereby preventing mixing of different milk sources and ensuring the stability of milk supply after switching.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for preparing milk beverages to prevent mixing, characterized in that, The invention includes a coffee machine and a milk supply device connected to the coffee machine. The milk supply device includes a milk storage container and a milk supply pipeline connected to the milk storage container. The milk supply pipeline includes a first multi-port connector, at least two milk supply branches, a common pipeline, and a venting pipeline. The first multi-port connector has an input end and an output end. The output end of each milk supply branch and the output end of the venting pipe are respectively connected to the input end of the first multi-port connector. An air controller is provided on the venting pipe. The air controller is configured to selectively open or close to control the air supply to the common pipe. The milk storage device includes at least two milk source tanks, and each of the milk supply branches is connected to the milk source tank and a branch control valve that controls the on / off state of the milk supply branch; The input end of the common pipeline is connected to the output end of the first multi-port connector, and the output end of the common pipeline is connected to the coffee machine through a common pipeline control valve.

2. The milk-preparation equipment for preventing milk mixing according to claim 1, characterized in that, The air controller includes an air pump, an air valve or a pinch valve, and both the branch control valve and the common control valve include pinch valves or milk valves.

3. The milk-preparation equipment for preventing milk mixing according to claim 2, characterized in that, All the clamping valves are electromagnetic clamping valves, which can clamp the milk supply branch to stop the flow of milk when energized.

4. The milk-preparation equipment for preventing milk mixing according to claim 1, characterized in that, The ventilation line is also equipped with a one-way valve, which is located on the input or output side of the air controller. The one-way valve is used to prevent milk from entering the ventilation line.

5. The milk-preparation equipment for preventing milk mixing according to claim 4, characterized in that, The one-way valve is located on the input side of the air controller, and the one-way valve is a diaphragm one-way valve.

6. The milk-preparation equipment for preventing milk mixing according to claim 1, characterized in that, The milk supply equipment also includes a conveying mechanism located above the milk storage unit. The milk supply pipeline is arranged inside the conveying mechanism. At least two connection holes are opened at the bottom of the conveying mechanism. The input end of each milk supply branch passes through the corresponding connection hole and connects to the milk storage unit.

7. The milk mixing prevention beverage preparation equipment according to claim 1, characterized in that, The coffee machine includes a second multi-port connector and a milk frother connected to the output end of the second multi-port connector. The milk frother is configured to use steam to generate negative pressure to extract milk from the milk reservoir.

8. The milk-preparation equipment for preventing milk mixing according to claim 7, characterized in that, The coffee machine also includes a coffee machine gas valve and a water supply solenoid valve; The output terminals of the public road control valve, the coffee machine gas valve, and the water supply solenoid valve are respectively connected to the input terminal of the second multi-port connector.

9. The milk mixing prevention beverage preparation equipment according to claim 1, characterized in that, The coffee machine includes a milk pump and a milk frother connected to the output of the milk pump, the milk pump being configured to draw milk from the milk reservoir.

10. The milk-preparation equipment for preventing milk mixing according to claim 9, characterized in that, The coffee machine also includes a milk cleaning control valve and a water pump; The output end of the common road control valve, the input end of the milk cleaning control valve, and the input end of the water pump are respectively connected to the input end of the milk pump; The milk cleaning control valve is connected to an air vent.

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