A draft beer machine

Abstract

This invention provides a draft beer machine, belonging to the technical field of beverage drinking equipment. It solves the technical problem of existing draft beer machines' inability to effectively refrigerate beer kegs. The draft beer machine includes a casing, within which are a beer dispensing pipe and a cooling water tank for cooling the dispensing pipe. The casing also includes a refrigerated water tank for holding beer kegs, positioned higher than the refrigerated water tank. The cooling water tank has a drainage structure that allows refrigerant to flow from the cooling water tank into the refrigerated water tank. The draft beer machine also includes a power component that allows the refrigerant in the refrigerated water tank to flow back into the cooling tank. This invention provides better refrigeration performance.

Description

Technical Field

[0001] This invention belongs to the technical field of beverage drinking equipment, and relates to a draft beer machine. Background Technology

[0002] With the progress of the times and the improvement of people's living standards, people have higher requirements for drinking alcohol. Canned and bottled beer can no longer meet people's drinking needs. More and more people prefer to drink fresh, hygienic, and delicious draft beer. A draft beer machine is a device used to cool beverages. The structure of a draft beer machine usually includes a casing, inside which is a water tank and a beer dispensing pipe. The casing also contains a refrigeration system including a compressor, condenser, and refrigeration pipes. The water tank stores refrigerant, and the refrigeration pipes and beer dispensing pipes are coiled inside the water tank. The refrigeration pipes keep the refrigerant at a low temperature, thus cooling the beer as it flows through the dispensing pipe. The beer then flows out of the draft beer machine to the tap, where people can open the tap to drink the beer.

[0003] Among conventional draft beer machines, there are external keg draft beer machines, where the keg is placed outside the machine and connected to the machine's internal dispensing pipe via a beer hose. This allows the beer in the keg to be refrigerated as it flows through the machine, as illustrated in the aseptic draft beer machine disclosed in patent literature (application number: 201620422612.4). However, this type of machine lacks space to hold the keg and therefore cannot refrigerate it. Instead, the keg is placed outside the machine, where it remains at room temperature. The temperature inside the keg rises until it reaches room temperature, resulting in a shorter shelf life for the beer and making it more susceptible to spoilage, thus affecting the quality of the beer.

[0004] To address this problem, a common solution employed by those skilled in the art is to use a beer keg-integrated draft beer machine. This involves designating a refrigerated compartment within the machine for storing beer kegs. The refrigeration compartment utilizes a cooling principle similar to a refrigerator, allowing the kegs to be placed inside and thus extending the beer's shelf life. For example, a draft beer machine disclosed in patent literature (application number: 97234072.6) includes a refrigerated compartment for holding beer kegs, a dispensing head with a dispensing valve, a water-cooled beer hose, a control system, and a refrigeration system. The refrigeration system comprises a refrigeration system for cooling the space within the refrigerated compartment and a water-cooled refrigeration system for cooling the water-cooled beer hose. This draft beer machine places the beer kegs inside the refrigerated compartment and then sets the temperature within the compartment using a refrigeration thermostat, ensuring effective refrigeration of the beer kegs. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a novel draft beer machine structure to solve the technical problem that existing draft beer machines are unable to effectively refrigerate beer kegs.

[0006] The objective of this invention can be achieved through the following technical solution: A draft beer machine includes a casing, wherein a beer dispensing pipe and a cooling water tank for cooling the beer dispensing pipe are provided inside the casing. The machine is characterized in that a refrigerated water tank for placing beer kegs is also provided inside the casing, the cooling water tank is positioned higher than the refrigerated water tank, and the cooling water tank is provided with a drainage structure that allows the refrigerant in the cooling water tank to flow into the refrigerated water tank. This draft beer machine also includes a power component that allows the refrigerant in the refrigerated water tank to flow back into the cooling chamber.

[0007] When a draft beer machine is operating, a cooling water tank contains refrigerant, usually water. The machine's built-in refrigeration system maintains the refrigerant at around zero degrees Celsius, thus cooling the dispensing pipe immersed in the cooling water tank. Unlike conventional draft beer machines, this machine has an additional refrigerated water tank inside its casing. When using the machine, the beer keg is placed in the refrigerated water tank. The flow mechanism allows the refrigerant in the cooling water tank to flow into the refrigerated water tank, thereby cooling the keg. The cooling water tank is positioned higher than the refrigerated water tank, creating a liquid level difference between them, facilitating the flow of refrigerant from the cooling water tank into the refrigerated water tank. Furthermore, since the draft beer machine is equipped with a power component that allows the refrigerant in the refrigerated water tank to flow back to the refrigeration tank, it achieves continuous circulation of the refrigerant between the refrigerated and chilled water tanks. This ensures that the beer kegs are always immersed in the circulating refrigerant, and the refrigerant in the refrigerated water tank is always kept at a low temperature, thus giving the draft beer machine a better refrigeration effect.

[0008] In the aforementioned draft beer machine, the flow-through structure includes a flow-through pipe, with its two ends connected to the inner cavities of the chilled water tank and the refrigerated water tank, respectively. A valve is installed on the flow-through pipe to control its flow rate. This structure utilizes the height difference between the chilled and refrigerated water tanks, allowing the refrigerant in the chilled water tank to flow into the refrigerated water tank by gravity without the need for electricity, thus reducing the draft beer machine's energy consumption. The valve controls the flow rate or the amount of refrigerant in the flow-through pipe, maintaining a suitable liquid level in the refrigerated water tank.

[0009] In the aforementioned draft beer machine, the power component is a first water pump located inside the refrigerated water tank. A return water pipe is installed inside the machine casing, with one end connected to the outlet of the power component and the other end connected to the inner cavity of the refrigerated water tank. This structure allows the power component to pump the refrigerant from the refrigerated water tank back into the refrigerated water tank, achieving continuous circulation of the refrigerant between the refrigerated and refrigerated water tanks. This keeps the beer keg constantly immersed in the circulating refrigerant, maintaining the refrigerant at a low temperature and ensuring effective refrigeration of the beer keg.

[0010] In the aforementioned draft beer machine, the flow-guiding structure includes a second water pump capable of drawing refrigerant from the chilled water tank to the refrigerated water tank. The advantage of this structure is that by adjusting the real-time output power of the second water pump, the flow rate of the refrigerant can be adjusted, thereby facilitating the control of the temperature and level of the refrigerant in the refrigerated water tank, ultimately achieving temperature control for the refrigeration function.

[0011] In the aforementioned draft beer machine, a controller is also included. The valve is a solenoid valve, and a temperature sensor is installed in the chilled water tank. The power unit, valve, and temperature sensor are all electrically connected to the controller. The controller can control the working state of the power unit and valve based on the temperature signal detected by the temperature sensor. When the draft beer machine is working, an upper and lower threshold value for the temperature sensor are preset. When the temperature detected by the temperature sensor is higher than the upper threshold value, it indicates that the temperature of the refrigerant in the chilled water tank is too high. At this time, the controller starts to operate the power unit and simultaneously controls the valve to open, allowing the refrigerant in the chilled water tank to flow back to the refrigerated water tank. Simultaneously, the refrigerant in the refrigerated water tank flows into the chilled water tank. In this way, the temperature of the refrigerant in the chilled water tank gradually decreases until the temperature detected by the temperature sensor is lower than or equal to the lower threshold value. At this time, the controller controls the power unit to stop operating and simultaneously controls the valve to close. At this point, the refrigerant stops flowing between the refrigerated water tank and the chilled water tank. This design achieves automated temperature control of the chilled water tank, ensuring that the refrigerant in the chilled water tank is always kept at a lower temperature range, thus improving the chilling effect of the draft beer machine. Meanwhile, thanks to the adoption of automated control, the power components do not need to work continuously, thus achieving the goals of saving electricity and keeping the noise level low.

[0012] In the aforementioned draft beer machine, the refrigerated water tank is equipped with an upper liquid level sensor and a lower liquid level sensor located below the upper liquid level sensor. Both the upper and lower liquid level sensors are electrically connected to the controller. Normally, the flow rates of the power unit and the drain pipe are the same, ensuring that the refrigerant level in the refrigerated water tank remains relatively constant. However, under certain abnormal conditions, such as malfunctions in the solenoid valve and water pump, or replacement of beer kegs of different sizes, the liquid level in the refrigerated water tank can fluctuate significantly, leading to excessively low or high levels, or even overflow. In such cases, by installing upper and lower liquid level sensors in the refrigerated water tank, the controller can adjust the liquid level by controlling the operation of the power unit and valves when the liquid level is below the lower liquid level sensor or above the upper liquid level sensor. This maintains the liquid level within a reasonable range, ensuring proper refrigeration of the beer kegs and preventing refrigerant overflow.

[0013] In the aforementioned draft beer machine, the casing contains a refrigeration chamber, within which a refrigerated water tank is located. The refrigeration chamber is also equipped with a cooling component for cooling the space, and the casing also includes a fan that blows the cooling energy from the cooling component into the refrigeration chamber. This design ensures that the beer kegs are cooled not only by the water from the refrigerated water tank but also by the airflow from the cooling component and the fan. In other words, the draft beer machine's refrigeration chamber achieves a dual cooling function of water and air, allowing for better refrigeration of the beer kegs within the refrigeration chamber.

[0014] In the aforementioned draft beer machine, the chilled water tank is placed at the bottom of the refrigeration chamber. In this structure, the chilled water tank can be manufactured separately and then installed into the refrigeration chamber of the draft beer machine. This structure offers low manufacturing costs for the chilled water tank, and the tank can be removed for cleaning, making cleaning relatively convenient.

[0015] In the aforementioned draft beer machine, the casing includes an outer shell and an inner liner disposed within the outer shell. The bottom of the inner liner is recessed downwards to form the refrigerated water tank, and the top of the inner liner forms the chilled water tank located above and behind the refrigerated water tank. The inner liner is typically made of plastic, and the chilled water tank and refrigerated water tank of this structure are directly injection molded using a molding die, making manufacturing relatively convenient. Moreover, the injection-molded refrigerated water tank not only ensures structural strength but also reduces weight compared to water tanks made of metal materials, thus facilitating the lightweight design of the draft beer machine.

[0016] In the aforementioned draft beer machine, the casing houses a refrigeration system including the refrigeration pipes, compressor, and condenser. Both the refrigeration pipes and the dispensing pipe are partially located within the chilled water tank, and the refrigeration pipes within the tank are spirally wound into cylindrical structures. The cylindrical structure of both the refrigeration pipes and the dispensing pipe increases the contact area between the pipes and the refrigerant, allowing the refrigeration pipes to efficiently cool the refrigerant in the tank, while the refrigerant efficiently cools the dispensing pipe, thus improving the refrigeration effect of the draft beer machine on the dispensing pipe.

[0017] Compared with existing technologies, this draft beer machine has the following advantages:

[0018] 1. This draft beer machine has an additional refrigerated water tank inside the machine casing. At the same time, the refrigeration chamber is also equipped with a refrigeration component for cooling the refrigeration chamber. This allows the beer barrels to be cooled not only by the water in the refrigerated water tank, but also by the air cooling generated by the refrigeration component and the fan. In other words, the draft beer machine's refrigeration chamber achieves a dual cooling function of water cooling + air cooling, which allows the beer barrels in the refrigeration chamber to be refrigerated better.

[0019] 2. This draft beer machine achieves continuous circulation of refrigerant between the cooling water tank and the refrigerated water tank, so that the beer keg is always immersed in the circulating refrigerant, and the refrigerant in the refrigerated water tank is always kept at a low temperature, thus giving this draft beer machine a good refrigeration effect. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of Embodiment 1 of this draft beer machine.

[0021] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of this draft beer machine.

[0022] Figure 3 This is a three-dimensional structural diagram of the inner liner in Embodiment 1 of this draft beer machine.

[0023] Figure 4 This is a cross-sectional view of the beer keg after being placed in the beer keg in Embodiment 1 of this draft beer machine.

[0024] Figure 5 This is a block diagram of the control system of Embodiment 1 of this draft beer machine.

[0025] Figure 6 This is a three-dimensional structural diagram of the refrigeration component in Embodiment 1 of this draft beer machine.

[0026] Figure 7 This is a cross-sectional view of Embodiment 2 of this draft beer machine.

[0027] Figure 8 This is a cross-sectional view of Embodiment 3 of this draft beer machine.

[0028] In the diagram, 1. Casing; 1a. Refrigeration chamber; 1b. Outer shell; 1c. Inner liner; 2. Wine outlet pipe; 3. Refrigeration water tank; 31. Water tank cover; 4. Wine barrel; 5. Refrigerated water tank; 6. Power component; 7. Drain pipe; 8. Valve; 9. Second water pump; 10. Return water pipe; 11. Controller; 12. Temperature sensor; 13. Upper liquid level sensor; 14. Lower liquid level sensor; 15. Refrigeration component; 151. Temperature conductive plate; 152. Water pipe; 16. Refrigeration pipe; 17. Compressor; 18. Condenser; 19. Faucet; 20. Fan. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0030] Example 1

[0031] like Figure 1 and Figure 2As shown, this draft beer machine includes a housing 1, with a tap 19 on its outer wall. The housing 1 contains a refrigeration chamber 1a, a beer dispensing pipe 2, a chilled water tank 3 for cooling the dispensing pipe 2, and a chilled water tank 5 for holding beer kegs 4. The chilled water tank 5 is located within the refrigeration chamber 1a. The housing 1 also contains a refrigeration system including a compressor 17, a condenser 18, and refrigeration pipes 16. Both the refrigeration pipes 16 and the beer dispensing pipe 2 are partially located within the chilled water tank 3, and the refrigeration pipes 16 and 16 within the chilled water tank 3 are spirally wound into cylindrical structures. To reduce the loss of cold air within the chilled water tank 3, a tank cover 31 is provided on the top of the chilled water tank 3. When using this draft beer machine, the beer keg 4 is placed in the refrigerated water tank 5, one end of the beer outlet pipe 2 is connected to the beer keg 4, and the other end is connected to the tap 19. In this way, the beer flowing out of the beer keg 4 can flow through the refrigerated water tank 3 for cooling, and then the chilled beer reaches the tap 19. People can open the tap 19 and drink delicious chilled beer.

[0032] like Figure 1 As shown, the position of the refrigeration water tank 3 is higher than that of the refrigeration water tank 5, and the refrigeration water tank 3 is provided with a flow-guiding structure that allows the refrigerant in the refrigeration water tank 3 to flow into the refrigeration water tank 5. This draft beer machine also includes a power component 6 that allows the refrigerant in the refrigeration water tank 5 to flow back to the refrigeration chamber.

[0033] like Figure 1 and Figure 4 As shown, the drainage structure includes a drainage pipe 7, with both ends of the drainage pipe 7 connected to the inner cavity of the cooling water tank 3 and the inner cavity of the refrigerated water tank 5, respectively. A valve 8 is provided on the drainage pipe 7 to control the flow state of the drainage pipe 7. This structure utilizes the height difference between the cooling water tank 3 and the refrigerated water tank 5, allowing the refrigerant in the cooling water tank 3 to flow into the refrigerated water tank 5 by its own gravity through the drainage pipe 7.

[0034] like Figure 1 and Figure 4 As shown, the power unit 6 is a first water pump installed inside the refrigerated water tank 5. A return water pipe 10 is installed inside the casing 1. One end of the return water pipe 10 is connected to the outlet of the power unit 6, and the other end is connected to the inner cavity of the refrigerated water tank 3. The power unit 6 can pump the refrigerant from the refrigerated water tank 5 back into the refrigerated water tank 3, realizing continuous circulation of the refrigerant between the refrigerated water tank 3 and the refrigerated water tank 5. This ensures that the wine barrel 4 is always immersed in the circulating refrigerant, maintaining the refrigerant at a low temperature, and allowing the wine barrel 4 to be effectively refrigerated.

[0035] like Figure 2 and Figure 3As shown, the housing 1 includes an outer shell 1b and an inner liner 1c disposed within the outer shell 1b. The bottom of the inner liner 1c is recessed downwards to form a refrigerated water tank 5, and the top of the inner liner 1c forms a cooling water tank 3 located above and behind the refrigerated water tank 5. The inner liner 1c is typically made of plastic. The cooling water tank 3 and the refrigerated water tank 5 of this structure are directly injection molded using a molding die, making manufacturing relatively convenient.

[0036] like Figure 1 and Figure 5 As shown, this draft beer machine also includes a controller 11, a solenoid valve 8, and a temperature sensor 12 installed in the chilled water tank 5. The power unit 6, valve 8, and temperature sensor 12 are all electrically connected to the controller 11. The controller 11 can control the working state of the power unit 6 and valve 8 based on the temperature signal detected by the temperature sensor 12. When the draft beer machine is working, the upper and lower threshold values ​​of the temperature sensor 12 are preset. When the temperature detected by the temperature sensor 12 is higher than the upper threshold value, it indicates that the temperature of the refrigerant in the chilled water tank 5 is too high. At this time, the controller starts to work on the power unit 6 and simultaneously opens the valve 8, allowing the refrigerant in the chilled water tank 5 to flow back to the chilled water tank 3. At the same time, the refrigerant in the chilled water tank 3 flows into the chilled water tank 5. In this way, the temperature of the refrigerant in the chilled water tank 5 will gradually decrease until the temperature detected by the temperature sensor 12 is lower than or equal to the lower threshold value. At this time, the controller 11 controls the power unit 6 to stop working and simultaneously controls the valve 8 to close. At this time, the refrigerant stops flowing between the chilled water tank 3 and the chilled water tank 5. This design enables automated temperature control of the chilled water tank 5, ensuring that the refrigerant inside remains within a low temperature range, thus improving the chilling effect of the draft beer machine. Simultaneously, due to the automated control, the power unit 6 does not require continuous operation, thereby achieving energy savings and quieter operation.

[0037] Furthermore, such as Figure 1 and Figure 5As shown, the refrigerated water tank 5 is also equipped with an upper liquid level sensor 13 and a lower liquid level sensor 14 located below the upper liquid level sensor 13. Both the upper liquid level sensor 13 and the lower liquid level sensor 14 are electrically connected to the controller 11. Under normal circumstances, the flow rates of the power unit 6 and the drain pipe 7 are the same, which keeps the liquid level of the refrigerant in the refrigerated water tank 5 basically constant. However, under certain abnormal conditions, such as malfunctions of the solenoid valve and water pump, or replacement of the wine barrel 4 with one of different sizes, the liquid level in the refrigerated water tank 5 may change significantly, resulting in a liquid level that is too low or too high, or even overflow. At this time, by installing an upper liquid level sensor 13 and a lower liquid level sensor 14 in the refrigerated water tank 5, when the liquid level is lower than the position of the lower liquid level sensor 14 or higher than the position of the upper liquid level sensor 13, the controller 11 can adjust the liquid level in the refrigerated water tank 5 by controlling the working state of the power component 6 and the valve 8, thereby keeping the liquid level in the refrigerated water tank 5 within a reasonable height range, so that the wine barrel 4 can be refrigerated well, and at the same time, the situation of refrigerant overflowing from the refrigerated water tank 5 can be avoided.

[0038] like Figure 2 and Figure 4 As shown, the refrigeration chamber 1a is also equipped with a cooling component 15 for cooling the refrigeration chamber 1a, and the casing 1 is also equipped with a fan 20 that blows the cold energy emitted by the cooling component 15 into the refrigeration chamber. Through this design, the beer barrel 4 can be cooled not only by the water in the refrigerated water tank 5, but also by the air cooling generated by the cooling component 15 and the fan 20. That is, the refrigeration chamber 1a of the draft beer machine achieves a dual cooling function of water cooling + air cooling, which allows the beer barrel 4 in the refrigeration chamber to be refrigerated better.

[0039] like Figure 6 As shown, the refrigeration component 15 includes several parallel temperature-conducting fins 151, with a meandering water pipe 152 passing through each fin. A circulation pump (not shown) is installed in the cooling water tank 3 to pump the refrigerant from the tank into the water pipe 152 for circulation. Because the refrigerant circulates within the water pipe 152, the temperature of each temperature-conducting fin 151 decreases, resulting in a better cooling effect for the refrigeration component 15. The fan 20 blows the cool air emitted by the refrigeration component 15 into the refrigerator compartment, thereby lowering the temperature of the compartment.

[0040] When this draft beer machine is operating, the cooling water tank 3 contains refrigerant, which is usually water. The machine's built-in refrigeration system maintains the refrigerant at around zero degrees Celsius, thus cooling the beer dispensing pipe 2, which is immersed in the cooling water tank 3. The drainage structure allows the refrigerant in the cooling water tank 3 to flow into the refrigerated water tank 5, thereby cooling the beer keg 4. The cooling water tank 3 is positioned higher than the refrigerated water tank 5, creating a liquid level difference between them, facilitating the flow of refrigerant from the cooling water tank 3 into the refrigerated water tank 5. Furthermore, the machine is equipped with a power component 6 that allows the refrigerant in the refrigerated water tank 5 to flow back into the cooling tank, achieving continuous circulation of the refrigerant between the cooling water tank 3 and the refrigerated water tank 5. This ensures that the beer keg 4 is always immersed in the circulating refrigerant, and the refrigerant in the refrigerated water tank 5 remains at a low temperature, resulting in excellent refrigeration performance.

[0041] Example 2

[0042] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: the refrigerated water tank 5 is placed at the bottom of the refrigeration chamber 1a. The refrigerated water tank 5 is manufactured separately and then installed into the refrigeration chamber of the draft beer machine. The refrigerated water tank 5 with this structure has low manufacturing cost, and it can be removed for cleaning, making cleaning relatively convenient.

[0043] Example 3

[0044] This embodiment is basically the same as Embodiment 1 in structure and principle, except that the form of the diversion structure is different. In this embodiment, the diversion structure includes a second water pump 9 that can pump the refrigerant in the cooling water tank 3 into the refrigeration water tank 5. The advantage of this structure is that by adjusting the real-time output power of the second water pump 9, the flow rate of the refrigerant can be adjusted, thereby facilitating the control of the temperature and liquid level of the refrigerant in the refrigeration water tank 5, and ultimately achieving temperature control for the refrigeration function.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0046] Although this document frequently uses terms such as 1. casing; 1a. refrigeration chamber; 1b. outer shell; 1c. inner liner; 2. wine outlet pipe; 3. refrigeration water tank; 31. water tank cap; 4. wine barrel; 5. refrigerated water tank; 6. power component; 7. drain pipe; 8. valve; 9. second water pump; 10. return water pipe; 11. controller; 12. temperature sensor; 13. upper liquid level sensor; 14. lower liquid level sensor; 15. refrigeration component; 151. temperature conductive plate; 152. water pipe; 16. refrigeration pipe; 17. compressor; 18. condenser; 19. faucet; 20. fan, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A draught beer machine comprising a machine housing (1) in which a beer tapping pipe (2) and a refrigerated water tank (3) for cooling the tapping pipe (2) are arranged, characterized in that, The machine shell (1) is further provided with a refrigeration water tank (5) for placing a wine barrel (4), the position of the refrigeration water tank (3) is higher than that of the refrigeration water tank (5), and the refrigeration water tank (3) is provided with a drainage structure for enabling the refrigeration liquid in the refrigeration water tank (3) to flow into the refrigeration water tank (5), and the draught beer machine further comprises a power member (6) for enabling the refrigeration liquid in the refrigeration water tank (5) to flow back to the refrigeration tank.

2. The draught beer machine of claim 1, wherein, The drainage structure comprises a drainage pipe (7), both ends of the drainage pipe (7) are communicated with the inner cavity of the refrigeration water tank (3) and the inner cavity of the refrigeration water tank (5) respectively, and the drainage pipe (7) is provided with a valve (8) for controlling the flow state of the drainage pipe (7).

3. The draught beer machine of claim 2, wherein, The power member (6) is a first water pump arranged in the refrigeration water tank (5), the machine shell (1) is provided with a return water pipe (10), one end of the return water pipe (10) is communicated with the outlet of the power member (6), and the other end is communicated with the inner cavity of the refrigeration water tank (3).

4. The draught beer machine of claim 3, wherein, The draught beer machine further comprises a controller (11), the valve (8) is an electromagnetic valve, the refrigeration water tank (5) is provided with a temperature sensor (12), the power member (6), the valve (8) and the temperature sensor (12) are electrically connected with the controller (11), and the controller (11) can control the working state of the power member (6) and the valve (8) according to the temperature signal detected by the temperature sensor (12).

5. The draught beer machine of claim 4, wherein, The refrigeration water tank (5) is further provided with an upper liquid level sensor (13) and a lower liquid level sensor (14) located below the upper liquid level sensor (13), and the upper liquid level sensor (13) and the lower liquid level sensor (14) are electrically connected with the controller (11).

6. A draught beer machine according to any one of claims 1 to 5, wherein, The machine shell (1) has a refrigeration cavity (1a), the refrigeration water tank (5) is located in the refrigeration cavity (1a), the refrigeration cavity (1a) is further provided with a refrigeration member (15) for refrigerating the refrigeration cavity (1a), and the machine shell (1) is further provided with a fan (20) for blowing the cold energy emitted by the refrigeration member (15) to the refrigeration chamber.

7. The draught beer machine of claim 6, wherein, The machine shell (1) comprises an outer shell (1b) and an inner container (1c) arranged in the outer shell (1b), the bottom of the inner container (1c) is concave downward to form the refrigeration water tank (5), and the top of the inner container (1c) forms the refrigeration water tank (3) located above the rear of the refrigeration water tank (5).

8. The draught beer machine of claim 6, wherein, The refrigeration water tank (5) is placed at the bottom of the refrigeration cavity (1a).

9. The draught beer machine according to any one of claims 1 to 5, wherein, The machine shell (1) is provided with a refrigeration system comprising a refrigeration pipe (16), a compressor (17) and a condenser (18), the refrigeration pipe (16) and the wine outlet pipe (2) are both partially located in the refrigeration water tank (3), and the refrigeration pipe (16) and the refrigeration pipe (16) located in the refrigeration water tank (3) are respectively wound in a spiral manner to form a cylindrical structure.

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