A milk frother

Abstract

The utility model relates to the technical field of drinking equipment, put forward a kind of milk foam machine, including the machine body with milk foam generator and milk foam outlet, the milk foam generator includes delivery pump, milk supply component and gas supply component, delivery pump input respectively with milk supply component liquid outlet, gas supply component air outlet connection, delivery pump output and milk foam outlet are connected;Cold milk foam channel and hot milk foam channel are equipped between the delivery pump and milk foam outlet, milk liquid and air respectively along milk supply component and gas supply component enter and pass through delivery pump after mixing, after passing through cold milk foam channel, cold milk foam is exported from milk foam outlet or after heating, hot milk foam is exported from milk foam outlet. Realize milk liquid and air after mixing by delivery pump, corresponding milk foam can be selectively exported through cold milk foam channel or hot milk foam channel.

Description

Technical Field

[0001] This utility model relates to the technical field of drinking equipment, specifically to a milk frother. Background Technology

[0002] In daily life, users typically choose to prepare milk foam at different temperatures based on personal preference or the needs of their beverages. For example, when making cold drinks such as iced coffee or iced latte, a cool and creamy cold milk foam is needed; while when making traditional hot drinks such as latte or cappuccino, a rich, warm, and smooth hot milk foam is required.

[0003] Therefore, the market urgently needs a milk foaming device that can flexibly meet the above-mentioned different needs—that is, an integrated milk frother that can conveniently output high-quality cold or hot milk foam according to the user's selection. Such a device can simplify the coffee-making process for home or commercial use, allowing users to easily and quickly obtain their ideal beverage pairings, thereby improving their user experience and quality of life. Utility Model Content

[0004] This utility model proposes a milk frother, which, through the connection structure of a delivery pump, a milk supply component, an air supply component, a cold milk froth channel, a hot milk froth channel, and a milk froth output channel, enables the milk and air to be mixed by the delivery pump and then selectively output through either the cold or hot milk froth channel. This meets the diverse beverage preparation needs in home and commercial settings and improves operational convenience.

[0005] A milk frother designed for this purpose includes a body equipped with a milk foam generating device and a milk foam outlet, wherein the milk foam generating device includes: The system includes a delivery pump, a milk supply assembly, and an air supply assembly. The input end of the delivery pump is connected to the liquid outlet end of the milk supply assembly and the air outlet end of the air supply assembly, respectively, and the output end of the delivery pump is connected to the milk foam outlet. A cold milk foam channel and a hot milk foam channel are provided between the delivery pump and the milk foam outlet. Milk and air enter along the milk supply component and the air supply component respectively, and after being mixed by the delivery pump, cold milk foam is output from the milk foam outlet through the cold milk foam channel, or hot milk foam is output from the milk foam outlet after being heated through the hot milk foam channel.

[0006] The air supply assembly includes a first solenoid valve for introducing air, the input end of the first solenoid valve being connected to the atmosphere, and the output end of the first solenoid valve being connected to the input end of the delivery pump.

[0007] The milk supply assembly includes a second solenoid valve for introducing milk and a container for storing milk. The input end of the second solenoid valve is connected to the container, and the output end of the second solenoid valve is connected to the input end of the delivery pump. A first three-way solenoid valve is provided between the output end of the delivery pump, the inlet end of the cold milk foam channel, and the inlet end of the hot milk foam channel. The first end of the first three-way solenoid valve is connected to the output end of the delivery pump, the second end of the first three-way solenoid valve is connected to the inlet end of the cold milk foam channel, and the third end of the first three-way solenoid valve is connected to the inlet end of the hot milk foam channel, so as to select and switch the output of cold milk foam or hot milk foam through the first three-way solenoid valve.

[0008] The machine body is equipped with a drain device for treating waste liquid. Before cold or hot milk foam is output, the milk and air are mixed by a delivery pump and then discharged through the drain device. The drainage device includes a waste liquid tank, and a cold milk foam channel and a hot milk foam channel are respectively connected to the waste liquid tank; The milk foam outlet is located on the milk foam output channel. The drainage device also includes a drainage channel connected to the waste liquid tank. A second three-way solenoid valve is provided between the inlet ends of the milk foam output channel and the drainage channel to selectively open and close the inlet end of the milk foam output channel and the inlet end of the drainage channel through the second three-way solenoid valve. The first end of the second three-way solenoid valve is connected to the outlet end of the cold milk foam channel and the outlet end of the hot milk foam channel; the second end of the second three-way solenoid valve is connected to the inlet end of the milk foam output channel; and the third end of the second three-way solenoid valve is connected to the inlet end of the drain channel.

[0009] The machine body is equipped with a cleaning mechanism for cleaning the cold milk foam channel and the hot milk foam channel; The liquid outlet of the cleaning mechanism is connected to the input end of the delivery pump; the liquid output by the cleaning mechanism enters the cold milk foam channel or the hot milk foam channel via the delivery pump. The cleaning mechanism includes a heating device for heating liquid. The heating device is provided with a first hot water output end. A first hot water channel and a third solenoid valve are provided between the first hot water output end and the input end of the delivery pump. The first hot water output end is connected to the liquid inlet end of the first hot water channel. The water outlet end of the first hot water channel is connected to the third solenoid valve. The third solenoid valve is connected to the input end of the delivery pump. The third solenoid valve is used to open and close the water outlet end of the first hot water channel.

[0010] A bypass mixing channel for connecting to a water supply device is provided on one side of the first hot water channel; a fourth solenoid valve for connecting to the first hot water channel is provided at the outlet end of the bypass mixing channel; the fourth solenoid valve is connected to the outlet end of the bypass mixing channel to open and close the outlet end of the bypass mixing channel. The fourth solenoid valve is opened during the cleaning process, and the cold water from the water supply device enters the first hot water channel from the bypass mixing channel so that the cold water and hot water are mixed. After mixing, the liquid is pumped into the cold milk foam channel or the hot milk foam channel.

[0011] The heating device is provided with a second hot water output terminal for connecting to the hot milk foam channel; The hot milk foam channel is equipped with a heat exchanger, which includes two independently spaced first heat exchange zones and second heat exchange zones. The output end of the hot milk foam channel is connected to the liquid inlet end of the first heat exchange zone, and the liquid outlet end of the first heat exchange zone is connected to the liquid outlet end of the cold milk foam channel. A fifth solenoid valve is provided between the liquid inlet end of the first heat exchange zone to open and close the hot milk foam channel outlet end; A second hot water channel is provided between the second hot water output end of the heating device and the liquid inlet end of the second heat exchange zone. The second hot water output end of the heating device is connected to the second hot water channel, and the liquid outlet end of the second hot water channel is connected to the liquid inlet end of the second heat exchange zone. During the heating process of hot milk foam, the hot water from the heating device enters the second heat exchange zone of the heat exchanger from the second hot water channel to heat the milk foam that has entered the first heat exchange zone of the heat exchanger. During the cleaning process, the mixed liquid is pumped into the hot milk foam channel and the first heat exchange zone of the heat exchanger. A sixth solenoid valve is provided between the liquid outlet of the second hot water channel and the liquid inlet of the second heat exchange zone, so as to open and close the liquid outlet of the second hot water channel through the sixth solenoid valve.

[0012] The heating device is a steam boiler, and there are two steam boilers. The first hot water channel and the second hot water channel are respectively connected to the corresponding steam boilers. Alternatively, there may be one steam boiler, with the first hot water channel and the second hot water channel both connected to the same steam boiler.

[0013] The heating device is provided with a steam output terminal for connecting to a steam output channel and a third hot water output terminal for connecting to a hot water output channel. The steam output channel outlet end is provided with a seventh solenoid valve for opening and closing the steam output channel outlet end, and the machine body is provided with a steam output pipe for connecting the seventh solenoid valve. The hot water output channel outlet end is provided with an eighth solenoid valve for opening and closing the hot water output channel outlet end, and the body is provided with a hot water output pipe for connecting the eighth solenoid valve. The heating device is equipped with a first connector for connecting a water level sensor, a second connector for connecting a pressure relief valve or a safety valve, a third connector for connecting a temperature sensor, and a fourth connector for connecting a pressure gauge.

[0014] The machine body is equipped with a second three-way solenoid valve for connecting the milk foam output channel and the drain channel, as well as a waste liquid tank connected to the outlet end of the drain channel. The first end of the second three-way solenoid valve is connected to the outlet end of the cold milk foam channel and the outlet end of the hot milk foam channel; the second end of the second three-way solenoid valve is connected to the inlet end of the milk foam output channel; the third end of the second three-way solenoid valve is connected to the inlet end of the drain channel. During the cleaning process, the liquid that enters the cold milk foam channel or the hot milk foam channel, as well as the first heat exchange zone of the heat exchanger, enters the waste liquid tank through the drain channel. The liquid outlet end of the second heat exchange zone of the heat exchanger is connected to the waste liquid tank. The side of the machine body is provided with a mounting hole for connecting a box, which is used to store milk and is connected to the liquid inlet end of the milk supply component. The machine body is equipped with a dispensing nozzle for connecting to the milk foam output channel; The heating device is provided with a cold water inlet for connecting to a water supply device.

[0015] The beneficial technical effects of this utility model are as follows: By setting up a connection structure for the delivery pump, milk supply component, air supply component, cold milk foam channel, hot milk foam channel and milk foam output channel, the milk and air can be mixed by the delivery pump and then selectively output through the cold milk foam channel or the hot milk foam channel. This meets the diverse beverage preparation needs in home and commercial settings and improves the ease of operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a milk frother according to an embodiment of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of a milk frother according to an embodiment of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the internal structure of a milk frother according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure in which the liquid discharge channel first outputs liquid during the production of milk foam according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of cold foam output according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure for outputting hot milk foam according to an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the cleaning channel in one embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure for outputting hot water or steam according to an embodiment of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of a heat exchanger according to an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] See Figures 1-9 A milk frother includes a body 1 equipped with a milk foam generating device and a milk foam outlet, wherein the milk foam generating device includes: The pump 2, the milk supply assembly, and the air supply assembly are provided. The input end of the pump 2 is connected to the liquid outlet end of the milk supply assembly and the air outlet end of the air supply assembly, respectively. The output end of the pump 2 is connected to the milk foam outlet. A cold milk foam channel 7 and a hot milk foam channel 8 are provided between the delivery pump 2 and the milk foam outlet. Milk and air enter along the milk supply component and the air supply component respectively, and after being mixed by the delivery pump 2, cold milk foam is output from the milk foam outlet through the cold milk foam channel 7 or hot milk foam is output from the milk foam outlet after being heated by the hot milk foam channel 8.

[0027] By setting up a connection structure for the delivery pump 2, milk supply component, air supply component, cold milk foam channel 7, hot milk foam channel 8 and milk foam output channel 9, the milk and air can be mixed by the delivery pump 2 and then selectively output through the cold milk foam channel 7 or the hot milk foam channel 8 to meet the diverse beverage preparation needs in home and commercial settings and improve the ease of operation.

[0028] The air supply assembly includes a first solenoid valve 3 for introducing air, the input end of the first solenoid valve 3 is connected to the atmosphere, and the output end of the first solenoid valve 3 is connected to the input end of the delivery pump 2.

[0029] The amount of air entering the system is adjusted by setting the opening and closing time of the first solenoid valve 3.

[0030] The milk supply assembly includes a second solenoid valve 4 for introducing milk and a container for storing milk. The input end of the second solenoid valve 4 is connected to the container, and the output end of the second solenoid valve 4 is connected to the input end of the delivery pump 2. The amount of milk entering the system can be adjusted by setting the opening and closing time of the second solenoid valve 4.

[0031] A first three-way solenoid valve 5 is provided between the output end of the delivery pump 2, the inlet end of the cold milk foam channel 7, and the inlet end of the hot milk foam channel 8. The first end of the first three-way solenoid valve 5 is connected to the output end of the delivery pump 2, the second end of the first three-way solenoid valve 5 is connected to the inlet end of the cold milk foam channel 7, and the third end of the first three-way solenoid valve 5 is connected to the inlet end of the hot milk foam channel 8, so as to select and switch the output of cold milk foam or hot milk foam through the first three-way solenoid valve 5.

[0032] The machine body 1 is equipped with a drain device for treating waste liquid. Before cold milk foam or hot milk foam is output, the milk and air are mixed by the delivery pump 2 and then discharged through the drain device. The drainage device includes a waste liquid tank 25, and a cold milk foam channel 7 and a hot milk foam channel 8 are respectively connected to the waste liquid tank 25. The milk foam outlet is set on the milk foam output channel 9. The drainage device also includes a drainage channel 6 connected to the waste liquid tank 25. A second three-way solenoid valve 10 is provided between the inlet ends of the milk foam output channel 9 and the drainage channel 6, so as to selectively open and close the inlet end of the milk foam output channel 9 and the inlet end of the drainage channel 6 through the second three-way solenoid valve 10. The first end of the second three-way solenoid valve 10 is connected to the outlet end of the cold milk foam channel 7 and the outlet end of the hot milk foam channel 8; the second end of the second three-way solenoid valve 10 is connected to the inlet end of the milk foam output channel 9; and the third end of the second three-way solenoid valve 10 is connected to the inlet end of the drain channel 6.

[0033] The drainage channel 6 is designed to allow milk mixed with air to pass through it first, thus removing any milk residue from the previous preparation and preventing foaming that may occur in the initial channel during milk foam preparation (air pockets form at the start of preparation, requiring drainage). This avoids the initial milk foam affecting quality. The opening time of the drainage channel 6 can be adjusted by setting a corresponding time. The second three-way solenoid valve 10 can selectively open and close the milk foam output channel 9 and the drainage channel 6. Before milk foam preparation, the drainage channel 6 performs pretreatment. After the previously prepared milk is discharged through the drainage channel 6, the second three-way solenoid valve 10 closes the drainage channel 6 and switches to open the milk foam output channel 9, ensuring the normal output of cold and hot milk foam subsequently. The machine body 1 is equipped with a cleaning mechanism for cleaning the cold milk foam channel 7 and the hot milk foam channel 8; The outlet of the cleaning mechanism is connected to the input of the delivery pump 2; the liquid output from the cleaning mechanism enters the cold milk foam channel 7 or the hot milk foam channel 8 via the delivery pump 2. The cleaning mechanism includes a heating device 11 for heating liquid. The heating device 11 is provided with a first hot water output end. A first hot water channel 12 and a third solenoid valve 13 are provided between the first hot water output end and the input end of the delivery pump 2. The first hot water output end is connected to the liquid inlet end of the first hot water channel 12, and the water outlet end of the first hot water channel 12 is connected to the third solenoid valve 13. The third solenoid valve 13 is connected to the input end of the delivery pump 2 and is used to open and close the water outlet end of the first hot water channel 12.

[0034] The cleaning mechanism is connected to the input of the delivery pump 2, which can send cleaning liquid into the cold milk foam channel 7 and the hot milk foam channel 8, effectively removing residual milk in the channels. This prevents milk from remaining in the channels for a long time, thus avoiding bacterial growth and odor, and ensuring the hygiene and safety of the milk foam. The cleaning process utilizes the existing delivery pump 2 and channel system, simplifying the cleaning structure, reducing equipment costs, and eliminating the need for manual disassembly and cleaning by the user, thus improving operational convenience. A bypass mixing channel 14 for connecting to a water supply device is provided on one side of the first hot water channel 12; a fourth solenoid valve 15 for connecting to the first hot water channel 12 is provided at the outlet end of the bypass mixing channel 14; the fourth solenoid valve 15 is connected to the outlet end of the bypass mixing channel 14 to open and close the outlet end of the bypass mixing channel 14. The fourth solenoid valve 15 is opened during the cleaning process, and the cold water from the water supply device enters the first hot water channel 12 from the bypass mixing channel 14 so that the cold water and hot water are mixed. After mixing, the liquid enters the cold milk foam channel 7 or the hot milk foam channel 8 through the delivery pump 2.

[0035] The bypass mixing channel 14 can introduce cold water from the water supply device to mix with the hot water in the first hot water channel 12 to regulate the temperature of the cleaning liquid. This prevents high-temperature hot water from directly entering the channel and causing damage to some heat-sensitive channel components, thus extending the service life of the channel.

[0036] The heating device 11 is provided with a second hot water output end for connecting to the hot milk foam channel 8; The hot milk foam channel 8 is equipped with a heat exchanger 16, which includes two independently spaced first heat exchange zones and second heat exchange zones. The output end of the hot milk foam channel 8 is connected to the liquid inlet end of the first heat exchange zone, and the liquid outlet end of the first heat exchange zone is connected to the liquid outlet end of the cold milk foam channel 7. A fifth solenoid valve 17 is provided between the liquid inlet end of the first heat exchange zone to open and close the output end of the hot milk foam channel 8. A second hot water channel 18 is provided between the second hot water output end of the heating device 11 and the liquid inlet end of the second heat exchange zone. The second hot water output end of the heating device 11 is connected to the second hot water channel 18, and the liquid outlet end of the second hot water channel 18 is connected to the liquid inlet end of the second heat exchange zone. During the heating process of hot milk foam, hot water from the heating device 11 enters the second heat exchange zone of the heat exchanger 16 through the second hot water channel 18 to heat the milk foam that has entered the first heat exchange zone of the heat exchanger 16. During the cleaning process, the mixed liquid enters the first heat exchange zone of the hot milk foam channel 8 and the heat exchanger 16 via the delivery pump 2; A sixth solenoid valve 19 is provided between the liquid outlet of the second hot water channel 18 and the liquid inlet of the second heat exchange zone, so as to open and close the liquid outlet of the second hot water channel 18 through the sixth solenoid valve 19.

[0037] The heating device 11 can heat the cleaning liquid. Hot water cleaning can remove residual milk stains and oil stains in the channel more efficiently than cold water, thus improving the cleaning cleanliness.

[0038] The heating device 11 is a steam boiler, and there are two steam boilers. The first hot water channel 12 and the second hot water channel 18 are respectively connected to the corresponding steam boilers. Alternatively, there may be one steam boiler, with the first hot water channel 12 and the second hot water channel 18 both connected to the same steam boiler.

[0039] The heat exchanger 16 is configured with a first heat exchange zone and a second heat exchange zone separated by a heating device 11. Hot water from the heating device 11 heats the milk foam entering the first heat exchange zone, preventing direct contact between the hot water and the milk foam and thus avoiding contamination of the milk, ensuring the taste and hygiene of the milk foam. The fifth solenoid valve 17 controls the opening and closing of the hot milk foam channel 8, and the sixth solenoid valve 19 controls the delivery of hot water to the second hot water channel 18. During cleaning, the mixed liquid can enter the first heat exchange zone of the heat exchanger 16 to remove residual milk and prevent cross-contamination.

[0040] The heating device 11 is provided with a steam output end for connecting to the steam output channel 20 and a third hot water output end for connecting to the hot water output channel 21. The steam output channel 20 is provided with a seventh solenoid valve 22 for opening and closing the steam output channel 20, and the body 1 is provided with a steam output pipe 101 for connecting the seventh solenoid valve 22. The hot water output channel 21 is provided with an eighth solenoid valve 23 for opening and closing the hot water output channel 21, and the body 1 is provided with a hot water output pipe 102 for connecting the eighth solenoid valve 23. The heating device 11 is provided with a first connector 1101 for connecting a water level sensor 24, a second connector for connecting a pressure relief valve or a safety valve, a third connector 1102 for connecting a temperature sensor, and a fourth connector 1103 for connecting a pressure gauge.

[0041] The steam boiler, serving as the heating device 11, generates hot water sufficient to meet the needs of heating hot milk foam and cleaning the channels. The steam boiler boasts high heating efficiency and stable temperature, enhancing the speed of hot milk foam preparation and improving cleaning effectiveness. Two steam boilers are connected to the first hot water channel 12 and the second hot water channel 18 respectively, allowing independent control of the temperature and supply of the cleaning water and the hot milk foam heating water, thus improving the equipment's operational flexibility.

[0042] A single steam boiler can be connected to two channels simultaneously, which simplifies the internal structure of the equipment and reduces manufacturing costs. The two settings can be adapted to different production needs and scenarios, improving the market applicability of the equipment. The corresponding channels can be opened by corresponding solenoid valves.

[0043] The machine body 1 is provided with a second three-way solenoid valve 10 for connecting the milk foam output channel 9 and the drain channel 6, and a waste liquid tank 25 connected to the liquid outlet end of the drain channel 6. The first end of the second three-way solenoid valve 10 is connected to the outlet end of the cold milk foam channel 7 and the outlet end of the hot milk foam channel 8; the second end of the second three-way solenoid valve 10 is connected to the inlet end of the milk foam output channel 9; the third end of the second three-way solenoid valve 10 is connected to the inlet end of the drain channel 6. During the cleaning process, the liquid entering the cold milk foam channel 7 or the hot milk foam channel 8, as well as the first heat exchange zone of the heat exchanger 16, enters the waste liquid tank 25 through the drain channel 6. The liquid outlet end of the second heat exchange zone of the heat exchanger 16 is connected to the waste liquid tank 25. The side of the machine body 1 is provided with a mounting hole 103 for connecting a box, which is used to store milk and is connected to the liquid inlet end of the milk supply component. The body 1 is provided with a dispensing nozzle 104 for connecting to the milk foam output channel 9; The heating device 11 is provided with a cold water inlet for connecting to a water supply device.

[0044] The steam output channel 20 and hot water output channel 21 enable the heating device 11 to output steam and hot water in addition to supporting the preparation and cleaning of hot milk foam, expanding the device's functionality and meeting the needs of making other beverages such as milk tea and hot cocoa, thus enhancing the device's practicality. The seventh solenoid valve 22 and the eighth solenoid valve 23 control the output of steam and hot water respectively, achieving precise switching between functions. The water level sensor 24, pressure relief valve, temperature sensor, and pressure gauge are connected to the heating device 11 via corresponding connectors, enabling real-time monitoring of the device's operating status and timely feedback of any abnormalities in water level, temperature, or pressure, ensuring safe operation and reducing the risk of malfunction. Waste liquid tank 25 collects waste liquid discharged through drain channel 6 and effluent from the second heat exchange zone of heat exchanger 16 during the cleaning process, preventing waste liquid from being discharged indiscriminately and polluting the equipment interior or operating table, thus improving the cleanliness of the equipment. Mounting hole 103 facilitates cabinet installation, and the cabinet (container) storing milk ensures a continuous milk supply. Dispensing nozzle 104 provides a stable outlet for milk foam output, preventing splashing during milk foam output and improving ease of use. Heating device 11 connects to the water supply device, ensuring a continuous supply of water for cleaning and heat exchange, eliminating the need for manual water addition and simplifying the equipment operation process. Cold milk foam preparation: Open the first solenoid valve 3 and the second solenoid valve 4. Air enters the air supply assembly and milk enters the delivery pump 2 through the milk supply assembly to mix. The first three-way solenoid valve 5 switches to the state connected to the cold milk foam channel 7. The mixture is delivered to the second three-way solenoid valve 10 through the cold milk foam channel 7. First, control the second three-way solenoid valve 10 to connect to the drain channel 6 to discharge residual substances. Then, switch to connect to the milk foam output channel 9. The cold milk foam is output through the dispensing nozzle 104. Figure 4 , Figure 5 As shown. Hot milk foam preparation: After milk and air are mixed by the delivery pump 2, the first three-way solenoid valve 5 switches to connect with the hot milk foam channel 8, and the mixture enters the hot milk foam channel 8. The sixth solenoid valve 19 is opened, and the fifth solenoid valve 17 is also opened. Hot water from the heating device 11 enters the second heat exchange zone of the heat exchanger 16 through the second hot water channel 18, heating the mixture in the first heat exchange zone. The heated mixture then flows to the second three-way solenoid valve 10, and after draining through the drain channel 6 to remove residual substances, the second three-way solenoid valve 10 switches to connect with the milk foam output channel 9. The hot milk foam enters the outlet 104 from the milk foam output channel 9 for output. Figure 4 , Figure 6 As shown. Cleaning process: Close the first solenoid valve 3 and the second solenoid valve 4, open the third solenoid valve 13 and the inlet solenoid valve of the water supply device. Cold water enters the heating device 11 through the inlet solenoid valve for heating. The hot water from the heating device 11 enters the first hot water channel 12. Open the fourth solenoid valve 15 as needed to introduce cold water and adjust the temperature. The mixed liquid enters the cold milk foam channel 7 or the hot milk foam channel 8 via the transfer pump 2 (the first three-way solenoid valve 5 switches to the corresponding channel). The second three-way solenoid valve 10 switches to connect to the drain channel 6, and the waste liquid is discharged into the waste liquid tank 25. The effluent from the second heat exchange zone of the heat exchanger 16 is also discharged into the waste liquid tank 25. Figure 7 As shown. In this embodiment, the heat exchanger 16 includes a shell and a spiral tube disposed inside the shell. The spiral tube is the first heat exchange zone for milk foam to enter, and the space between the inner cavity of the shell and the spiral tube is the second heat exchange zone for hot water to flow.

[0045] In this embodiment, the output end of the delivery pump 2 is provided with a pressure boosting channel accessory 26 (such as a pressure boosting valve). The channel accessory 26 is connected to the first end of the first three-way solenoid valve 5.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A milk frother, comprising a body (1) equipped with a milk foam generating device and a milk foam outlet, characterized in that, The milk foam generating device includes: The pump (2), the milk supply assembly and the air supply assembly are respectively connected to the liquid outlet of the milk supply assembly and the air outlet of the air supply assembly. The output end of the pump (2) is connected to the milk foam outlet. A cold milk foam channel (7) and a hot milk foam channel (8) are provided between the delivery pump (2) and the milk foam outlet. Milk and air enter along the milk supply component and the air supply component respectively and are mixed by the delivery pump (2). Cold milk foam is output from the milk foam outlet through the cold milk foam channel (7) or hot milk foam is output from the milk foam outlet after being heated by the hot milk foam channel (8).

2. The milk frother according to claim 1, characterized in that: The air supply assembly includes a first solenoid valve (3) for introducing air, the input end of the first solenoid valve (3) is connected to the atmosphere, and the output end of the first solenoid valve (3) is connected to the input end of the delivery pump (2).

3. The milk frother according to claim 1, characterized in that: The milk supply assembly includes a second solenoid valve (4) for introducing milk and a container for storing milk. The input end of the second solenoid valve (4) is connected to the container, and the output end of the second solenoid valve (4) is connected to the input end of the delivery pump (2). A first three-way solenoid valve (5) is provided between the output end of the delivery pump (2), the inlet end of the cold milk foam channel (7), and the inlet end of the hot milk foam channel (8). The first end of the first three-way solenoid valve (5) is connected to the output end of the delivery pump (2), the second end of the first three-way solenoid valve (5) is connected to the inlet end of the cold milk foam channel (7), and the third end of the first three-way solenoid valve (5) is connected to the inlet end of the hot milk foam channel (8), so as to select and switch the output of cold milk foam or hot milk foam through the first three-way solenoid valve (5).

4. The milk frother according to claim 3, characterized in that: The machine body (1) is equipped with a drain device for treating waste liquid. Before cold milk foam or hot milk foam is output, the milk and air are mixed by the conveying pump (2) and discharged through the drain device. The drainage device includes a waste liquid tank (25), a cold milk foam channel (7) and a hot milk foam channel (8) which are respectively connected to the waste liquid tank (25); The milk foam outlet is located on the milk foam output channel (9). The draining device also includes a draining channel (6) connected to the waste liquid tank (25). A second three-way solenoid valve (10) is provided between the inlet ends of the milk foam output channel (9) and the draining channel (6) so as to selectively open and close the inlet end of the milk foam output channel (9) and the inlet end of the draining channel (6) through the second three-way solenoid valve (10). The first end of the second three-way solenoid valve (10) is connected to the outlet end of the cold milk foam channel (7) and the outlet end of the hot milk foam channel (8); the second end of the second three-way solenoid valve (10) is connected to the inlet end of the milk foam output channel (9); the third end of the second three-way solenoid valve (10) is connected to the inlet end of the drain channel (6).

5. The milk frother according to claim 1, characterized in that: The machine body (1) is provided with a cleaning mechanism for cleaning the cold milk foam channel (7) and the hot milk foam channel (8); The outlet of the cleaning mechanism is connected to the input end of the delivery pump (2); the liquid output by the cleaning mechanism enters the cold milk foam channel (7) or the hot milk foam channel (8) through the delivery pump (2). The cleaning mechanism includes a heating device (11) for heating liquid. The heating device (11) is provided with a first hot water output end. A first hot water channel (12) and a third solenoid valve (13) are provided between the first hot water output end and the input end of the delivery pump (2). The first hot water output end is connected to the liquid inlet end of the first hot water channel (12). The water outlet end of the first hot water channel (12) is connected to the third solenoid valve (13). The third solenoid valve (13) is connected to the input end of the delivery pump (2). The third solenoid valve (13) is used to open and close the water outlet end of the first hot water channel (12).

6. The milk frother according to claim 5, characterized in that: A bypass mixing channel (14) for connecting a water supply device is provided on one side of the first hot water channel (12); a fourth solenoid valve (15) for connecting the first hot water channel (12) is provided at the outlet end of the bypass mixing channel (14); the fourth solenoid valve (15) is connected to the outlet end of the bypass mixing channel (14) to open and close the outlet end of the bypass mixing channel (14); The fourth solenoid valve (15) is opened during the cleaning process, and the cold water from the water supply device enters the first hot water channel (12) through the bypass mixing channel (14) so ​​that the cold water and hot water are mixed. After mixing, the liquid enters the cold milk foam channel (7) or the hot milk foam channel (8) through the delivery pump (2).

7. The milk frother according to claim 5, characterized in that: The heating device (11) is provided with a second hot water output end for connecting to the hot milk foam channel (8); The hot milk foam channel (8) is provided with a heat exchanger (16), which includes two independently spaced first heat exchange zones and second heat exchange zones. The output end of the hot milk foam channel (8) is connected to the liquid inlet end of the first heat exchange zone, and the liquid outlet end of the first heat exchange zone is connected to the liquid outlet end of the cold milk foam channel (7). A fifth solenoid valve (17) is provided between the liquid inlet end of the first heat exchange zone to open and close the output end of the hot milk foam channel (8) through the fifth solenoid valve (17); A second hot water channel (18) is provided between the second hot water output end of the heating device (11) and the liquid inlet end of the second heat exchange zone. The second hot water output end of the heating device (11) is connected to the second hot water channel (18), and the liquid outlet end of the second hot water channel (18) is connected to the liquid inlet end of the second heat exchange zone. During the heating process of hot milk foam, the hot water from the heating device (11) enters the second heat exchange zone of the heat exchanger (16) through the second hot water channel (18) to heat the milk foam that has entered the first heat exchange zone of the heat exchanger (16); During the cleaning process, the mixed liquid enters the first heat exchange zone of the hot milk foam channel (8) and the heat exchanger (16) via the delivery pump (2); A sixth solenoid valve (19) is provided between the liquid outlet of the second hot water channel (18) and the liquid inlet of the second heat exchange zone, so as to open and close the liquid outlet of the second hot water channel (18) through the sixth solenoid valve (19).

8. The milk frother according to claim 7, characterized in that: The heating device (11) is a steam boiler, and there are two steam boilers. The first hot water channel (12) and the second hot water channel (18) are respectively connected to the corresponding steam boilers. Alternatively, there may be one steam boiler, with the first hot water channel (12) and the second hot water channel (18) connected to the same steam boiler.

9. The milk frother according to claim 5, characterized in that: The heating device (11) is provided with a steam output end for connecting to the steam output channel (20) and a third hot water output end for connecting to the hot water output channel (21); The steam output channel (20) is provided with a seventh solenoid valve (22) for opening and closing the steam output channel (20) and the body (1) is provided with a steam output pipe (101) for connecting the seventh solenoid valve (22). The hot water output channel (21) is provided with an eighth solenoid valve (23) for opening and closing the hot water output channel (21) outlet end, and the body (1) is provided with a hot water output pipe (102) for connecting the eighth solenoid valve (23). The heating device (11) is provided with a first connector (1101) for connecting a water level sensor (24), a second connector for connecting a pressure relief valve or a safety valve, a third connector (1102) for connecting a temperature sensor, and a fourth connector (1103) for connecting a pressure gauge.

10. The milk frother according to claim 7, characterized in that: The machine body (1) is provided with a second three-way solenoid valve (10) for connecting the milk foam output channel (9) and the drain channel (6), as well as a waste liquid tank (25) connected to the liquid outlet end of the drain channel (6). The first end of the second three-way solenoid valve (10) is connected to the outlet end of the cold milk foam channel (7) and the outlet end of the hot milk foam channel (8); the second end of the second three-way solenoid valve (10) is connected to the inlet end of the milk foam output channel (9); the third end of the second three-way solenoid valve (10) is connected to the inlet end of the drain channel (6); During the cleaning process, the liquid that enters the cold milk foam channel (7) or the hot milk foam channel (8) and the first heat exchange zone of the heat exchanger (16) enters the waste liquid tank (25) through the drain channel (6); The liquid outlet end of the second heat exchange zone of the heat exchanger (16) is connected to the waste liquid tank (25); The side of the machine body (1) is provided with an installation hole (103) for connecting the box, which is used to store milk and is connected to the liquid inlet end of the milk supply component; The body (1) is provided with a liquid outlet (104) for connecting to the milk foam output channel (9). The heating device (11) is provided with a cold water inlet for connecting to the water supply device.

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