Milk foaming device and method for making foamed milk

Abstract

The present invention discloses a milk foaming device and a method for making foamed milk, and belongs to the technical field of beverage processing. A milk foaming device comprises a milk supply component, a hot water supply component, a stirring component, a beverage cup, a slide, and a control system. The present invention adopts a mechanical stirring and foaming method to heat the raw milk and hot water to 40°C to 50°C for full stirring and foaming, and then adds hot water to raise the temperature of the foamed milk to 65°C, and the foamed milk is made. The application of the present invention makes it easy to replace and clean the milk delivery pipeline, reducing pollution; reducing the steam generating device, reducing the production cost; accurately measuring the amount of raw milk to ensure the stability of the milk foaming quality.

Description

Technical Field

[0001] The invention belongs to the technical field of beverage processing, in particular to a milk frothing device and a method for making frothed milk. Background Art

[0002] Fancy coffee drinks are made with milk and milk foam. Milk foam refers to the foam made from beaten milk. When mixed with coffee, it creates a fancy coffee that is both beautiful and delicious, and is gradually being sought after by many coffee lovers.

[0003] When making milk froth, traditional fully automatic coffee machines use a tee to connect the milk source pipeline and steam pipeline in parallel, and use the negative pressure generated by the high-pressure steam to suck the fresh milk into the coffee machine pipeline and mix it with hot air to foam and heat the milk. During this process, the fresh milk will enter the steam pipeline and nozzle with a very small aperture, and the milk source pipeline is not easy to disassemble. Therefore, it takes a lot of work to thoroughly clean the milk source pipeline and steam pipeline, and requires high skills of maintenance personnel.

[0004] This method of milk frothing has the following problems: first, the milk foam is very easy to adhere to the inner wall of the pipe, which is prone to produce bacteria or deterioration, causing food safety problems; second, a steam generator is required to provide steam, which increases the production cost; third, the amount of milk cannot be accurately measured, resulting in the inability to control the stability of the foaming quality.

[0005] Therefore, when fully automatic coffee machines using this foaming mechanism are applied to the field of vending machines that need to be deployed in large quantities, they will incur unaffordable maintenance costs, thus losing their practicality. Therefore, currently, fully automatic coffee machines for vending machines cannot use liquid milk foaming to provide milk and milk foam, and it is difficult to produce fancy coffee with a quality and taste similar to that of coffee shops. Summary of the invention

[0006] The main technical problem solved by the present invention is to provide a milk frothing device and a method for making frothed milk, which reduces the steam generating device and thus reduces the production cost, facilitates the replacement and cleaning of the milk supply pipeline and thus avoids the pollution of the milk supply pipeline, accurately measures the amount of milk and thus ensures the stability of the milk frothing quality, so that the automatic vending-type fully automatic coffee machine can use the liquid milk source and can make high-quality milk froth, thereby improving the production level of fancy coffee.

[0007] In order to achieve the above object, the first technical solution adopted by the present invention is: a milk frothing device, characterized in that it comprises:

[0008] The beverage cup is a container for the raw milk frothing process;

[0009] A milk supply component, which delivers the raw milk required for the raw milk frothing process to the beverage cup;

[0010] A hot water supply component, which delivers the hot water required for the raw milk frothing process to the beverage cup;

[0011] A stirring component, which stirs the raw milk and hot water required for the foaming process to make foamed milk, and the stirring component is arranged above the mouth of the beverage cup;

[0012] a control system for controlling the opening or closing of the milk supply component, the hot water supply component and the stirring component, and setting the amount of raw milk and hot water required for the frothing process, the rotation speed of the stirring component, the operation time of the stirring component and the downward movement distance of the stirring component; and

[0013] A multi-way liquid outlet pipe, at least two pipe openings of which are respectively connected to the milk supply component and the hot water supply component, and one pipe opening is located just above the opening of the beverage cup.

[0014] Preferably, it further comprises a slide, which is arranged above the beverage cup, and the slide comprises a slider connected to the stirring component, and when the slider moves up and down, the stirring component moves synchronously.

[0015] Preferably, the slide also includes:

[0016] A motor, which is used to control the up and down movement of the slide block of the slide table, the motor is electrically connected to the control system, and the power and stroke of the motor are set by the control system; and

[0017] A lead screw is used to drive the slider to move up and down synchronously. The upper part of the lead screw is threadedly connected to the motor, and the middle part of the lead screw is connected to the slider.

[0018] Preferably, the stirring member comprises:

[0019] a stirring motor, used for adjusting the mixing speed of the raw milk and the hot water, the stirring motor being mounted on the slider; and

[0020] A stirrer is used for mixing the raw milk and the hot water, and the stirrer is vertically mounted on the stirring motor and is located just above the mouth of the beverage cup.

[0021] Preferably, the stirrer is a stirring rod.

[0022] Preferably, the milk supply component comprises:

[0023] A refrigerator, which is used to control the temperature of the raw milk;

[0024] A milk storage tank, which is used to store the raw milk and is placed in the refrigerator;

[0025] A liquid level sensor, which is used to detect the amount of the raw milk in the milk storage tank, and the liquid level sensor is connected to the control system;

[0026] A milk delivery tube, which delivers the raw milk to the beverage cup, wherein one end of the milk delivery tube is opened at the bottom of the milk storage tank, and the other end is connected to the multi-way liquid outlet pipe; and

[0027] A peristaltic pump provides power for conveying the raw milk and is connected to the milk delivery tube. A pump head of the peristaltic pump is electrically connected to the control system.

[0028] Preferably, the milk delivery tube is a food-grade hose, and the protein content and fat content of the raw milk are both >6%.

[0029] Preferably, the hot water supply component comprises:

[0030] an instant water heater, which is used to generate hot water required for the raw milk frothing process and is electrically connected to the control system; and

[0031] A hot water pipe is used to transport the hot water. One end of the hot water pipe is connected to the instant water heater, and the other end is connected to the multi-way liquid outlet pipe. The hot water pipe is a food-grade hose.

[0032] The second technical solution adopted by the present invention is: a method for making foamed milk, characterized in that it comprises the following steps:

[0033] Determine the amount of foamed milk to be produced, determine the amount of foamed milk to be produced according to the needs of the drinker, and select a beverage cup of corresponding capacity;

[0034] Transporting raw milk, where the milk supply component transports the raw milk required for the foaming milk production process to the multi-channel liquid outlet pipe, and then transports it to the beverage cup;

[0035] Supplying hot water, where the hot water supply component delivers the hot water required for the foaming milk production process to the multi-way liquid outlet pipe, and then delivers it to the beverage cup;

[0036] Stirring and frothing, wherein the raw milk and hot water required for the foamed milk production process are stirred by a stirring component to produce the foamed milk; and

[0037] The amount of raw materials is set, and according to the production amount of the foamed milk, the temperature of the raw milk and the temperature of the hot water, the control system calculates the amount of raw milk and the first amount of hot water required for foaming the milk at 40°C to 50°C, the second amount of hot water required to further dilute the foamed milk at 40°C to 50°C and heat it to 65°C, the rotation speed of the stirring component, the operating time of the stirring component and the distance the stirring component moves downward.

[0038] Preferably, the method further comprises the step of moving a slide block: above the beverage cup, moving a slide block connected to the stirring component up and down, thereby driving the stirring component to move synchronously.

[0039] Preferably, the step of moving the slide block further comprises:

[0040] Running the motor, the motor in the slide table operates according to the power and stroke set by the control system; and

[0041] The lead screw is rotated, and the lead screw threadedly connected to the motor rotates synchronously with the motor under the drive of the motor, thereby driving the slide block connected to the lead screw to slide up and down.

[0042] Preferably, the stirring and frothing step comprises:

[0043] Starting the stirring motor, when the slide stops moving downward and becomes stationary, the stirring component also stops moving downward and becomes stationary, and starting the stirring motor installed on the slide, and the stirring motor operates according to the set speed and time;

[0044] Stirring the raw milk to foam, a stirrer vertically mounted on the stirring motor extends into the beverage cup to stir and mix the raw milk and the first hot water, so that the raw milk is heated to 40° C. to 50° C. and foamed; and

[0045] The stirrer is cleaned, the stirring motor is turned off, the stirrer is raised, the stirrer is rinsed with the added second hot water, and the milk foamed at 40°C to 50°C is further diluted and heated to 65°C to obtain the foamed milk.

[0046] Preferably, the stirrer is a stirring rod.

[0047] Preferably, the step of conveying raw milk comprises:

[0048] Controlling the temperature of the raw milk, storing the raw milk in a milk storage tank in a refrigerator, and adjusting the temperature of the refrigerator to keep the temperature of the raw milk stable;

[0049] Detecting and controlling the amount of raw milk, using a liquid level sensor to detect changes in the amount of raw milk in the milk storage tank, and transmitting information on the change in the amount of raw milk to the control system, and the control system adjusting and controlling the amount of raw milk; and

[0050] The raw milk is transported. Under the control of the control system, the peristaltic pump provides power, and the milk delivery tube transports the raw milk to the beverage cup.

[0051] Preferably, the milk delivery tube is a food-grade hose, and the protein content and fat content of the raw milk are both >6%.

[0052] Preferably, the hot water supply step comprises:

[0053] Making hot water, under the control of the control system, the instant water heater produces hot water required for the raw milk frothing process; and

[0054] Hot water is transported, and the hot water generated by the instant water heater is transported to the beverage cup through a hot water pipe.

[0055] Preferably, the protein and fat contents in the foamed milk are both ≥ 3%.

[0056] The beneficial effects of the present invention are as follows: the application of the present invention enables the milk channel to be completely connected by a detachable hose, which is easy to replace and clean, thereby reducing milk pipeline pollution; reducing the steam generating device and reducing the production cost; and using a peristaltic pump to accurately measure the amount of milk to ensure the stability of the milk foaming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic structural diagram of a milk frothing device of the present invention;

[0058] The components in the accompanying drawings are marked as follows: 1-instantaneous water heater, 2-hot water pipe, 3-milk pipe, 4-peristaltic pump, 5-refrigerator, 6-milk storage tank, 7-liquid level sensor, 8-control system, 9-drinking cup, 10-multi-way liquid outlet pipe, 11-stirring rod, 12-stirring motor, 13-slider, 14-screw, 15-motor. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0060] It should be noted that the terms "first" and "second" in the claims and description of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0061] The production of milk foam comes from the fact that protein and fat have a large surface tension in a certain temperature range. When subjected to mechanical impact, they are fully mixed with air to form a large amount of foam. When making fancy coffee, the thickness, stability and density (fineness) of the milk foam are important indicators for measuring the quality of fancy coffee, which directly affect the appearance and taste of the product. Usually, making high-quality fancy coffee milk foam requires high-quality fresh milk (protein and fat content higher than 3%), special equipment and utensils, experienced operators, and better control of the foaming temperature range (usually between 40°C and 50°C).

[0062] The present invention adopts a mechanical stirring and foaming device, and the milk foam is formed by rotating the stirrer at an appropriate speed in a container containing milk with high protein and fat content, quickly incorporating and mixing air into the milk to form thick milk foam, and further adding hot water to the milk after the milk foam is formed to increase the temperature, so that the milk foam is further developed to a desired thickness and improved uniformity during the temperature change process. At the same time, the present invention selects high-concentration liquid milk as a special milk source, and the protein concentration and fat concentration in the milk source are both greater than 6%, so that the liquid milk can form dense and stable foam in a wider temperature range, and the protein and fat contents in the foamed milk after production are both above 3%.

[0063] Figure 1 The figure shows the structure of a milk frothing device, which mainly includes: an instant water heater 1, a hot water pipe 2, a milk delivery pipe 3, a peristaltic pump 4, a refrigerator 5, a milk storage tank 6, a liquid level sensor 7, a control system 8, a beverage cup 9, a multi-way liquid outlet pipe 10, a stirring rod 11, a stirring motor 12, a slider 13, a screw 14, and a motor 15.

[0064] The instant water heater 1 and the hot water pipe 2 constitute a hot water supply component. One end of the hot water pipe 2 is connected to the instant water heater 1, and the other end is connected to a pipe opening of the multi-way liquid outlet pipe 10. The liquid outlet of the multi-way liquid outlet pipe 10 is located just above the mouth of the beverage cup. The hot water pipe 2 uses a food-grade hose, which not only ensures the hygiene of the hot water, but also facilitates maintenance and replacement.

[0065] The refrigerator 5, the milk storage tank 6, the liquid level sensor 7, the milk delivery tube 3 and the peristaltic pump 4 constitute the milk supply component. The liquid level sensor is installed on the milk storage tank 6, and the milk storage tank 6 is placed in the refrigerator 5. There is an opening on the top of the milk storage tank 6 and the top of the refrigerator 5 for the milk delivery tube 3 to pass through. One end of the milk delivery tube 3 extends into the bottom of the milk storage tank 6, and the other end of the milk delivery tube 3 passes through the milk storage tank 6 and the refrigerator 5 and is connected to a pipe opening of the multi-way liquid outlet pipe 10. The milk delivery tube 3 uses a food-grade material hose that matches the peristaltic pump. When the milk delivery tube 3 in use needs to be cleaned, it can be disassembled and cleaned or replaced with a clean milk delivery tube 3 to continue making foamed milk without other complicated operations.

[0066] The stirring rod 11 and the stirring motor 12 constitute a stirring component. The stirring rod 11 is vertically mounted on the stirring motor 12, and the stirring motor 12 is mounted on the slider 13. The stirring rod 11 can also be replaced with other forms of stirrers, such as a propeller stirrer, a turbine stirrer, a paddle stirrer, etc.

[0067] The slider 13, the lead screw 14 and the motor 15 constitute the slide table in the present invention. The upper part of the lead screw 14 is threadedly connected to the motor 15, the middle part of the lead screw 14 is connected to the slider 13, and the motor 15 is electrically connected to the control system 8. The control system 8 controls the operation of the motor 15 according to the production program of the foamed milk, thereby controlling the up and down movement distance of the slider 13. The slider 13 slides as the lead screw 14 rotates. Then, the stirring motor 12 and the stirring rod 11 are driven to move up and down synchronously.

[0068] The control system 8 is electrically connected to the instant water heater 1, the peristaltic pump 4, the liquid level sensor 7, the stirring motor 12 and the motor 15. The control system 8 can control the opening and closing of the instant water heater 1, the peristaltic pump 4, the stirring motor 12 and the motor 15. The control system 8 can set and control the heating power, the flow rate and the water discharge time of the instant water heater 1 to control the temperature of the hot water and the amount of water discharged. The control system 8 can set and control the speed and rotation time of the peristaltic pump 4 to control the flow rate and flow of the raw milk in the milk delivery tube 3. The control system 8 can detect the change of the storage amount of raw milk in the milk storage tank 6 through the liquid level sensor 7 to monitor the use of raw milk, and then regulate the amount of raw milk. The control system 8 can set and control the power, speed and operation time of the stirring motor 12 to control the speed and stirring time of the stirring rod 11, thereby controlling the mixing state of raw milk, hot water and air when the milk is foamed. The control system 8 can set and control the power and stroke of the motor 15 to adjust the speed and distance of the slider 13 moving up and down, and further adjust the length of the stirring rod 11 extending into the beverage cup 9.

[0069] The control system 8 can also calculate and set the amount of raw milk required for a cup of 65°C foamed milk according to the amount of foamed milk produced, the temperature of the raw milk (the temperature of the refrigerator), and the temperature of the hot water (generally controlled at 70°C to 90°C). At the same time, the control system 8 calculates and sets the amount of hot water required to heat the raw milk required for a cup of 65°C foamed milk to 40°C to 50°C (the first amount of hot water) and the temperature and amount of hot water required to further heat the foamed milk at 40°C to 50°C to 65°C (the second amount of hot water).

[0070] The following is combined Figure 1 The operating method of a milk frothing device of the present invention is described in detail:

[0071] The operation steps of the present invention are as follows:

[0072] First, put the raw milk into the milk storage tank 6, and then put the milk storage tank 6 into the refrigerator 5 set at a fresh-keeping temperature (for example, 4°C). Add purified water into the instant water heater 1, and turn on the instant water heater 1 to heat the purified water to 70°C to 80°C.

[0073] Second, the control system 8 calculates and sets the amount of hot water (first amount of hot water) required to heat the raw milk to 40°C-50°C based on the amount of foamed milk selected by the drinker, the temperature of the raw milk (the temperature set in the refrigerator 5) and the hot water temperature (e.g. 80°C), and simultaneously calculates the temperature and amount of hot water (second amount of hot water) required to further dilute and heat the foamed milk at 40°C-50°C to a cup of foamed milk at 65°C.

[0074] 3. Select a beverage cup 9 of appropriate capacity, place the beverage cup 9 directly under the stirring rod 11, and under the control of the control system 8, start the peristaltic pump 4 in the milk supply component. The peristaltic pump 4 adds the required raw milk into the beverage cup 9 through the milk delivery tube and the multi-way liquid outlet tube according to the speed and operation time set by the control system 8.

[0075] 4. Under the control of the control system 8, the motor 15 in the slide is turned on. The motor 15 runs according to the power and stroke set by the control system 8, and the lead screw 14 rotates, thereby driving the slider 13 in the slide to move downward, and further driving the stirring rod 11 to move downward, so that the stirring rod 11 extends below the liquid surface of the raw milk but does not touch the beverage cup 9.

[0076] 5. The control system 8 controls the motor 15 to stop running, so that the slider 13 in the slide table stops moving, the control system 8 turns off the peristaltic pump 4 in the milk supply component, turns on the stirring motor in the stirring component, and the stirring rod 11 starts to stir the raw milk.

[0077] 6. Under the control of the control system 8, the hot water pipe 2 in the hot water supply component is opened, and hot water passes through the hot water pipe and the multi-way liquid outlet pipe. Hot water is added into the beverage cup 9 according to the first hot water volume to heat the raw milk to 40°C to 50°C. The raw milk and hot water are evenly mixed and foamed by the stirring rod 11.

[0078] 7. Under the control of the control system 8, the slider 13 in the slide table moves upward, thereby driving the stirring rod 11 to move upward, and hot water is added into the beverage cup 9 according to the second amount of hot water, so that the temperature of the foamed milk rises to 65°C, and the hot water is used to rinse the stirrer.

[0079] 8. After the stirring rod 11 rises to above the mouth of the beverage cup, under the control of the control system 8, the motor 15 in the slide, the stirring motor 12 in the stirring component and the instant water heater 1 in the hot water supply component are turned off, the foaming process ends, and a cup of foamed milk is prepared.

[0080] Beneficial effects of the present invention: The application of the present invention enables the milk channel to be completely connected by a detachable hose, which is easy to replace and clean, reducing milk pipeline pollution; reducing the steam generating device and reducing the production cost; using a peristaltic pump to accurately measure the amount of milk to ensure the stability of the milk foaming quality.

[0081] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A milk frothing device, characterized in that: include: The beverage cup is a container for the raw milk frothing process; A milk supply component, which delivers the raw milk required for the raw milk frothing process to the beverage cup; A hot water supply component, which delivers the hot water required for the raw milk frothing process to the beverage cup; A stirring component, which stirs the raw milk and hot water required for the foaming process to make foamed milk, and the stirring component is arranged above the mouth of the beverage cup; A control system, which controls the opening or closing of the milk supply component, the hot water supply component and the stirring component, and sets the amount of raw milk and hot water required for the frothing process, the rotation speed of the stirring component, the operation time of the stirring component and the downward movement distance of the stirring component; A multi-way liquid outlet pipe, at least two of which are connected to the milk supply component and the hot water supply component respectively, and one of which is located just above the opening of the beverage cup; as well as A slide, the slide is arranged above the beverage cup, the slide comprises a slider connected to the stirring component, when the slider moves up and down, the stirring component moves synchronously, Wherein, the milk supply component comprises: A refrigerator, which is used to control the temperature of the raw milk; A milk storage tank, which is used to store the raw milk and is placed in the refrigerator; A liquid level sensor, which is used to detect the amount of the raw milk in the milk storage tank, and the liquid level sensor is connected to the control system; A milk delivery tube, which delivers the raw milk to the beverage cup, wherein one end of the milk delivery tube is opened at the bottom of the milk storage tank, and the other end is connected to the multi-way liquid outlet pipe; and A peristaltic pump provides power for conveying the raw milk and is connected to the milk delivery tube. A pump head of the peristaltic pump is electrically connected to the control system.

2. The milk frothing device according to claim 1, characterized in that: The slide also includes: A motor, which is used to control the up and down movement of the slide block of the slide table, the motor is electrically connected to the control system, and the power and stroke of the motor are set by the control system; and A lead screw is used to drive the slider to move up and down synchronously. The upper part of the lead screw is threadedly connected to the motor, and the middle part of the lead screw is connected to the slider.

3. The milk frothing device according to claim 1, characterized in that: The stirring member comprises: a stirring motor, used for adjusting the mixing speed of the raw milk and the hot water, the stirring motor being mounted on the slider; and A stirrer is used for mixing the raw milk and the hot water, and the stirrer is vertically mounted on the stirring motor and is located just above the mouth of the beverage cup.

4. The milk frothing device according to claim 3, characterized in that: The stirrer is a stirring rod.

5. The milk frothing device according to claim 1, characterized in that: The milk delivery tube is a food-grade hose, and the protein content and fat content of the raw milk are both greater than 6%.

6. The milk frothing device according to claim 1, characterized in that: The hot water supply component comprises: an instant water heater, which is used to generate hot water required for the raw milk frothing process and is electrically connected to the control system; and A hot water pipe is used to transport the hot water. One end of the hot water pipe is connected to the instant water heater, and the other end is connected to the multi-way liquid outlet pipe. The hot water pipe is a food-grade hose.

7. A method for making foamed milk using the milk foaming device according to any one of claims 1 to 6, characterized in that: The steps include: Determine the amount of foamed milk to be produced, determine the amount of foamed milk to be produced according to the needs of the drinker, and select a beverage cup of corresponding capacity; Transporting raw milk, where the milk supply component transports the raw milk required for the foaming milk production process to the multi-channel liquid outlet pipe, and then transports it to the beverage cup; Supplying hot water, where the hot water supply component delivers the hot water required for the foaming milk production process to the multi-way liquid outlet pipe, and then delivers it to the beverage cup; Stirring and frothing, wherein the raw milk and hot water required for the foamed milk production process are stirred by a stirring component to produce the foamed milk; and The amount of raw materials is set, and according to the production amount of the foamed milk, the temperature of the raw milk and the temperature of the hot water, the control system calculates the amount of raw milk and the first amount of hot water required for foaming the milk at 40°C to 50°C, the second amount of hot water required to further dilute the foamed milk at 40°C to 50°C and heat it to 65°C, the rotation speed of the stirring component, the operating time of the stirring component and the distance the stirring component moves downward.

8. The method for making foamed milk according to claim 7, characterized in that: The method also includes a slide block moving step: above the beverage cup, moving the slide block connected to the stirring component up and down, thereby driving the stirring component to move synchronously.

9. The method for making foamed milk according to claim 8, characterized in that: The step of moving the slide block further comprises: Running the motor, the motor in the slide table operates according to the power and stroke set by the control system; and The lead screw is rotated, and the lead screw threadedly connected to the motor rotates synchronously with the motor under the drive of the motor, thereby driving the slide block connected to the lead screw to slide up and down.

10. The method for making foamed milk according to claim 7, characterized in that: The stirring and foaming step comprises: Starting the stirring motor, when the slide stops moving downward and becomes stationary, the stirring component also stops moving downward and becomes stationary, and starting the stirring motor installed on the slide, and the stirring motor operates according to the set speed and time; Stirring the raw milk to foam, a stirrer vertically mounted on the stirring motor extends into the beverage cup to stir and mix the raw milk and the first hot water, so that the raw milk is heated to 40° C. to 50° C. and foamed; and The stirrer is cleaned, the stirring motor is turned off, the stirrer is raised, the stirrer is rinsed with the added second hot water, and the milk foamed at 40°C to 50°C is further diluted and heated to 65°C to obtain the foamed milk.

11. The method for making foamed milk according to claim 10, characterized in that: The stirrer is a stirring rod.

12. The method for making foamed milk according to claim 7, characterized in that: The step of conveying raw milk comprises: Controlling the temperature of the raw milk, storing the raw milk in a milk storage tank in a refrigerator, and adjusting the temperature of the refrigerator to keep the temperature of the raw milk stable; Detecting and controlling the amount of raw milk, using a liquid level sensor to detect changes in the amount of raw milk in the milk storage tank, and transmitting information on the change in the amount of raw milk to the control system, and the control system adjusting and controlling the amount of raw milk; and The raw milk is transported. Under the control of the control system, the peristaltic pump provides power, and the milk delivery tube transports the raw milk to the beverage cup.

13. The method for making foamed milk according to claim 12, characterized in that: The milk delivery tube is a food-grade hose, and the protein content and fat content of the raw milk are both greater than 6%.

14. The method for making foamed milk according to claim 7, characterized in that: The hot water supply step comprises: Making hot water, under the control of the control system, the instant water heater produces the hot water required for the raw milk frothing process; and Hot water is transported, and the hot water generated by the instant water heater is transported to the beverage cup through a hot water pipe.

15. The method for making foamed milk according to any one of claims 7 to 14, characterized in that: The protein and fat contents in the foamed milk are both ≥3%.

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