Bubble water machine

Abstract

The utility model discloses a sparkling water machine which comprises a refrigerating system and a mixing tank, the refrigerating system comprises an evaporating pipe and further comprises a first water path provided with a first coil pipe, and the first water path is connected with a water inlet of the mixing tank; the refrigerating system further comprises a cooling box filled with a cooling medium, the mixing tank, the evaporation pipe and the first coil pipe are arranged in the cooling box and make contact with the cooling medium, the mixing tank is arranged on the outer side of the evaporation pipe, and the first coil pipe is arranged on the side, where the evaporation pipe is located, of the mixing tank and located below the evaporation pipe. Drinking water in the first water path passes through the cold insulation mixing tank, is cooled through the first coil pipe and then is injected into the mixing tank through the water inlet. According to the utility model, the taste of sparkling water is improved, the problem that the refrigeration effect of a household sparkling water machine is poorer when multiple persons or a large amount of sparkling water is used is solved, and the capability of continuously making the sparkling water is improved.

Description

Technical Field

[0001] This utility model relates to the field of sparkling water preparation technology, and in particular to a sparkling water machine. Background Technology

[0002] Artificial sparkling water is produced by using a sparkling water machine to inject food-grade gas into water using instantaneous high pressure. The higher the gas content in sparkling water, the better it tastes. The taste of sparkling water produced by existing home sparkling water machines needs improvement. Furthermore, when used by multiple people or in large quantities, the cooling effect of home sparkling water machines is poor, and their ability to continuously produce sparkling water needs to be improved. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a sparkling water machine.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a sparkling water machine, including a refrigeration system and a mixing tank. The refrigeration system includes an evaporation tube, characterized in that: it further includes a first water passage with a first coil, the first water passage being connected to the inlet of the mixing tank; the refrigeration system further includes a cooling box filled with a cooling medium, the mixing tank, the evaporation tube, and the first coil being respectively disposed in the cooling box and in contact with the cooling medium, the mixing tank being disposed outside the evaporation tube, the first coil being disposed on the side of the mixing tank where the evaporation tube is located and below the evaporation tube, the mixing tank being kept cold and the drinking water from the first water passage being cooled by the first coil before being injected into the mixing tank through the inlet.

[0005] Furthermore, it also includes a second water circuit with a second coil, which is disposed inside the cooling tank and in contact with the cooling medium for cooling the drinking water in the second water circuit; the first cold water pan and the second cold water pan are spirally wound to form a central cavity, and the first cold water pan and the second cold water pan are staggered in the first direction; the first water circuit is also provided with a third coil, which is disposed inside the central cavity and connected to the outlet of the mixing tank for cooling the aerated water.

[0006] Furthermore, it also includes a booster pump. The first water circuit is connected to the inlet of the mixing tank through the booster pump. The booster pump can pressurize the drinking water cooled by the first coil and inject it into the mixing tank from the inlet to mix with the gas introduced into the mixing tank from the air inlet to form sparkling water.

[0007] Furthermore, the mixing tank is a sealed structure, comprising multiple cavities and multiple connecting ribs. The multiple cavities are distributed along a first direction and are interconnected. The connecting ribs are respectively provided between two adjacent cavities. The connecting ribs extend along a second direction to increase the compressive strength of the mixing tank.

[0008] Furthermore, the mixing tank has a vertical structure, and the dimension of the mixing tank in the third direction is less than 1 / 2 of the dimension of the mixing tank in the second direction, so that it is flat; the mixing tank is provided with two symmetrically arranged left plates and right plates, one of which is located on the side opposite to the evaporation tube, and the left plates and right plates are corrugated plates with protrusions and concave parts, wherein the cavity is formed between the protrusion of one corrugated plate and the protrusion of the other corrugated plate, and the concave part of one corrugated plate is fixedly connected to the concave part of the other corrugated plate to form the connecting rib.

[0009] Furthermore, the cooling box is equipped with a stirring end of a stirring motor to stir the cooling medium inside the cooling box to accelerate freezing; the cooling box is wrapped with cold-insulating material.

[0010] Furthermore, the mixing tank is equipped with high and low water level probes, which are electrically connected to the control circuit board along with the booster pump. The high and low water level probes are used to detect the liquid level in the mixing tank, so that the control circuit board controls whether the booster pump starts or not based on the detection results of the high and low water level probes. An ice layer probe is installed on the evaporation tube, which is connected to the control circuit board to shut down the refrigeration system when the ice layer thickness reaches the required level.

[0011] Furthermore, a first check valve and a second check valve are provided on the connecting pipeline between the outlet end of the booster pump and the inlet of the mixing tank to control the flow direction and pressure of the boosted water; the air inlet is connected to an air inlet pipeline, which is equipped with a pressure relief valve and an air inlet check valve.

[0012] Furthermore, it also includes a three-way valve, the inlet of which is connected to a drinking water source, one outlet of which is connected to the inlet of the first water circuit, and the other outlet of which is connected to the inlet of the second water circuit; it also includes a water outlet, one inlet of which is connected to the outlet of the first water circuit via a first solenoid valve, and the other inlet of which is connected to the outlet of the second water circuit via a second solenoid valve; the water outlet is provided with multiple water distribution plates with multiple water outlet holes distributed inside.

[0013] Furthermore, the diameter of the water inlet is 1.8cm to 2.2cm, and the air inlet is connected to the gas cylinder through an air inlet pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model includes a refrigeration system, a mixing tank, and a first water circuit with a first coil. The first water circuit is connected to the inlet of the mixing tank. The refrigeration system includes an evaporator and a cooling box filled with a cooling medium. The mixing tank, evaporator, and first coil are respectively disposed in the cooling box and in contact with the cooling medium. The mixing tank is disposed outside the evaporator, and the first coil is disposed on the side of the mixing tank where the evaporator is located and below the evaporator. The drinking water from the first water circuit is cooled by the first coil and then injected into the mixing tank through the inlet after being kept cold by the mixing tank. This effectively utilizes the limited space of the household sparkling water machine, ensures the refrigeration effect, increases the solubility of the gas, improves the taste of the sparkling water, solves the problem of poor refrigeration effect of the household sparkling water machine when used by multiple people or in large quantities, and improves the ability to continuously produce sparkling water.

[0016] 2. This utility model features a second water circuit with a second coil. The second coil is located inside the cooling tank and comes into contact with the cooling medium to cool the drinking water in the second water circuit, thus providing users with ice water directly. The first and second cold water trays are spirally wound to form a central cavity, and the first and second cold water trays are staggered in the first direction. The first water circuit also features a third coil, which is located inside the central cavity and connected to the outlet of the mixing tank. This third coil is used to cool the sparkling water, so that the sparkling water produced has a cool taste, eliminating the need for other physical cooling methods such as adding ice cubes to the water cup, making it more convenient and effective to improve the taste of the sparkling water.

[0017] 3. The mixing tank in this invention has a vertical structure. The dimension of the mixing tank in the third direction is less than half the dimension in the second direction, resulting in a flat shape. The mixing tank has two symmetrically arranged left and right plates. The left and right plates are corrugated plates with convex and concave portions. A cavity is formed between the convex portions of one corrugated plate and the convex portions of the other corrugated plate, and connecting ribs are formed by welding the concave portions of one corrugated plate to the concave portions of the other corrugated plate. The welding method can be through-hole plug welding. The advantage of through-hole plug welding is that it can provide very strong connection strength in a localized area, while eliminating the need for full welding of the entire concave portion. This not only saves time and materials but also avoids problems such as deformation or excessive heat-affected zone caused by full welding. Simultaneously, one of the left and right plates of the mixing tank is located on the side opposite the evaporator tube to increase the cooling area near the evaporator tube, accelerating the reduction of the water-air mixing temperature inside the mixing tank.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the present invention is not limited to the embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 3 ;

[0022] Figure 4 This is a three-dimensional structural diagram of the mixing tank of this utility model. Figure 1 ;

[0023] Figure 5 This is a three-dimensional structural diagram of the mixing tank of this utility model. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 4 ;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 5 ;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 6 ;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 7 ;

[0028] Figure 10 yes Figure 9 Enlarged view of point A in the middle;

[0029] In the picture:

[0030] 1. Mixing tank; 11a. Water inlet; 12a. Air inlet; 13. Water outlet; 14. Water outlet check valve;

[0031] 2. Booster pump; 21. First check valve; 22. Second check valve;

[0032] 3. Cooling box; 31. Evaporator tube; 32. Stirring end;

[0033] 4. Three-way valve;

[0034] 41. First waterway; 42. Second waterway; 411. First coil; 421. Second coil; 412. Third coil;

[0035] 5. Ice probe;

[0036] 6. High and low water level probes;

[0037] 7. Pressure relief valve; 71. Inlet check valve;

[0038] 8. Outer casing; 81. Sparkling water button; 82. Ice water button;

[0039] 9. Control circuit board;

[0040] 10. First solenoid valve;

[0041] 11b. Water outlet; 111. First water distribution plate; 112. Water baffle plate; 113. Second water distribution plate;

[0042] 12b. Second solenoid valve. Detailed Implementation

[0043] In this utility model, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In addition, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] Please see Figures 1-10As shown, this utility model discloses a sparkling water machine, including a three-way inlet valve 4. The inlet of the three-way valve 4 is connected to a drinking water source, one outlet of the three-way valve 4 is connected to the inlet of a first water path 41, and the other outlet of the three-way valve 4 is connected to the inlet of a second water path 42. It also includes a refrigeration system and a mixing tank 1. The refrigeration system includes an evaporator pipe 31 and a cooling box 3 filled with a cooling medium. The mixing tank 1, the evaporator pipe 31, and the first coil 411 on the inlet water path are respectively disposed within the cooling box 3 and in contact with the cooling medium, which is water, but not limited to water. The mixing tank 1 is located outside the evaporator pipe 31, and the first coil 411 is located on the side of the mixing tank 1 where the evaporator pipe 31 is located and below the evaporator pipe 31. The drinking water from the first water path 41 is cooled by the first coil 411 and then injected into the mixing tank 1 through the inlet 11a. When the pressure inside the mixing tank 1 is constant, the solubility of the gas increases as the temperature decreases. In this embodiment, the cooling tank 3 filled with cooling medium is used for cold storage, so that the first coil 411 continuously and efficiently delivers cold water to the mixing tank 1, thereby effectively utilizing the limited space of the household sparkling water machine, ensuring the cooling effect and increasing the solubility of the gas, improving the taste of sparkling water, solving the problem of poor cooling effect of the household sparkling water machine when used by multiple people or in large quantities, and improving the ability to continuously produce sparkling water.

[0046] Please see Figure 1 As shown, the second water path 42 is equipped with a second coil 421, which is located inside the cooling tank 3 and in contact with the cooling medium to cool the drinking water in the second water path 42, thus providing users with ice water directly. The first cold water tray and the second cold water tray are spirally wound to form a central cavity, and the first cold water tray and the second cold water tray are staggered in the first direction. The first water path 41 is also equipped with a third coil 412, which is located in the central cavity and connected to the outlet 13 of the mixing tank 1 to cool sparkling water. This eliminates the need for other physical cooling methods, such as adding ice cubes to a water cup, to directly provide users with refreshing sparkling water, making it more convenient.

[0047] Therefore, this sparkling water machine has the dual function of providing both sparkling water and ice water, which can directly provide users with refreshing sparkling water and ice water, thus meeting the diverse needs of users.

[0048] Please see Figure 2 and Figure 3As shown, an ice probe 5 is mounted on the outside of the evaporator tube 31 via a fixed bracket. The ice probe 5 is connected to the control circuit board 9 via a wire to shut down the refrigeration system when the ice thickness reaches the required level. Specifically, when the three needles of the ice probe 5 receive signals from each other, they send a signal to the control circuit board 9. The control circuit board 9 then commands the compressor to power on and start working, cooling the water in the cooling tank 3. When the water temperature drops to 0℃~0.8℃, the water gradually freezes from the evaporator tube 31 outwards, and the ice layer thickness gradually increases. When the ice layer covers the needle of the ice probe 5 closest to the evaporator tube 31, the other two needles remain in the conductive state, and the evaporator tube 31 cools at low power. When the ice layer covers the two needles of the ice probe 5 closest to the evaporator tube 31, any two needles are de-energized, and the control circuit board 9 commands the compressor to stop working, and the evaporator tube 31 stops cooling. When the temperature inside the cooling tank 3 rises, the ice melts to the point where the two needles of the ice probe 5 are exposed, sending a sensing signal to the control circuit board 9. The control circuit board 9 then issues a command to start the compressor, and the compressor stops working when the two needles of the ice probe 5 are covered by the ice layer.

[0049] Please see Figure 3 As shown, the cooling box 3 is also equipped with a stirring end 32 of a stirring motor, which is used to stir the water in the cooling box 3 to accelerate freezing. Specifically, the stirring end 32 of the stirring motor stirs the cooling box 3 for a long time to make the temperature in the cooling box 3 more uniform. The cooling box 3 is also wrapped with a layer of cold insulation material, which can be a foam board (not shown in the figure).

[0050] Please see Figure 3 As shown, a first check valve 21 and a second check valve 22 are provided on the connecting pipeline between the outlet end of the booster pump 2 and the inlet 11a of the mixing tank 1. The opening directions of the first check valve 21 and the second check valve 22 are opposite to control the flow direction and pressure of the boosted water, so that the water flow and pressure are transmitted only from the outlet end of the booster pump 2 to the inlet 11a of the mixing tank 1. The air inlet 12a is connected to an air inlet pipeline, which is equipped with a pressure relief valve 7 and an air inlet check valve 71. When the pressure in the mixing tank 1 reaches a certain value, the pressure relief valve 7 automatically releases pressure and triggers a micro switch to control the closure of the gas cylinder.

[0051] Please see Figure 4 and Figure 5As shown, in this embodiment, the water inlet 11a and air inlet 12a of the mixing tank 1 are located at the upper end of the mixing tank 1, and the water outlet 13 is located at the lower end of the mixing tank 1. The mixing tank 1 is connected to the first coil 411 via a booster pump 2. The booster pump 2 can pressurize the drinking water cooled by the first coil 411 and inject it into the mixing tank 1 through the water inlet 11a to mix with the gas introduced into the mixing tank 1 through the air inlet 12a to form bubble water. The air inlet 12a is connected to a high-pressure carbon dioxide cylinder or other gas cylinders through an air inlet pipe, but is not limited to this. Specifically, the aperture of the water inlet 11a is 1.8cm to 2.2cm. After being pressurized by the booster pump 2, the water pressure can reach 1.0MPa to 1.4MPa. The high-pressure water is sprayed and atomized through the small-aperture water inlet 11a to form small-molecule water. The surface area of ​​the water increases, which increases the contact area between gas molecules and water molecules, thereby promoting water-gas mixing. Figure 3 As shown, the mixing tank 1 is a sealed structure, comprising multiple cavities and multiple connecting ribs. The cavities are distributed along a first direction and interconnected. Connecting ribs are provided between adjacent cavities, extending along a second direction to increase the compressive strength of the mixing tank 1. Specifically, the mixing tank 1 is a vertical structure. The dimension of the mixing tank 1 in the third direction is less than half of the dimension in the first direction, making it flat. The mixing tank 1 has two symmetrically arranged left and right plates, which are corrugated plates with protrusions and concave portions. A cavity is formed between the protrusions of one corrugated plate and the protrusions of the other corrugated plate. A connecting rib is formed by welding the concave portions of one corrugated plate and the concave portions of the other corrugated plate, but this is not limited to welding fixation. The welding method can be through-hole plug welding. The advantage of through-hole plug welding is that it can provide very strong connection strength in a local area without requiring full welding of the entire concave portion. This not only saves time and materials but also avoids problems such as deformation or excessive heat-affected zone caused by full welding. Meanwhile, one of the left and right plates of the mixing tank 1 is located on the side opposite to the evaporator tube 31 to increase the cooling area on the side closer to the evaporator tube 31 and accelerate the reduction of the temperature of water-air mixture in the mixing tank 1.

[0052] In addition, the mixing tank 1 is connected to a high / low water level probe 6. This probe 6 and the booster pump 2 are electrically connected to the control circuit board 9, respectively. The high / low water level probe 6 is used to detect the liquid level in the mixing tank 1, so that the control circuit board 9 controls whether the booster pump 2 is started based on the detection results. In this embodiment, if the high / low water level probe 6 detects that the water level in the mixing tank 1 is lower than the set minimum water level, the control circuit board 9 executes the start-up procedure for the booster pump 2 to replenish water; if the high / low water level probe 6 detects that the water level in the mixing tank 1 is exactly at the set maximum water level, the control circuit board 9 executes the power-off procedure, causing the booster pump 2 to shut down and stop replenishing water. Specifically, a portion of the high / low water level probe 6 is inserted into the cavity of the mixing tank 1 from top to bottom along a first direction, while the other portion is located outside the mixing tank 1 and connected to the control circuit board 9. Furthermore, when the drinking water in mixing tank 1 reaches the high water level probe, mixing tank 1 is 80% water and 20% carbon dioxide gas. If the user selects the sparkling water function at this time, the outlet 13 of mixing tank 1 automatically opens via the one-way valve 14 connected by the pipe, and the incoming air pressure forces the sparkling water out of mixing tank 1. When the low water level probe in mixing tank 1 senses no water, it sends a signal to the control circuit board 9. The control circuit board 9 then commands the booster pump 2 to start working, and the cooling pipe cools the drinking water by 0.8℃~12℃. The mixture is mixed in mixing tank 1 to form sparkling water. In addition, when the carbon dioxide gas in mixing tank 1 reaches 60%, the air inlet check valve 71 closes, and pressurized water enters mixing tank 1. The gas is mixed into the water to achieve nano-sized sparkling water. The carbon dioxide content (volume multiple at 20°C) in the sparkling water is not less than 3.5 to 4.0 times. The nano-sized sparkling water has a delicate and smooth taste. When the pressurized water reaches the high water level probe, the pressure in mixing tank 1 reaches its peak, and a signal is sent to control circuit board 9 to control circuit board 9, commanding the booster pump 2 to stop working.

[0053] Please see Figure 7 and Figure 8 As shown, this utility model also includes a water outlet 11b. One inlet of the water outlet 11b is connected to the outlet end of the first water passage 41 via a first solenoid valve 10, and the other inlet of the water outlet 11b is connected to the outlet end of the second water passage 42 via a second solenoid valve 12b. Specifically, the water outlet 11b can discharge water vertically. The first solenoid valve 10 and the second solenoid valve 12b connected to it are both high-pressure flow regulators to ensure safe water intake and prevent splashing. The first solenoid valve 10 and the second solenoid valve 12b respectively control the flow of water at the outlet ends of the first water passage 41 and the second water passage 42.

[0054] Please see Figure 9 and Figure 10As shown, the water outlet 11b contains multiple water distribution plates with multiple water outlet holes. Specifically, there are two water distribution plates in the water outlet 11b: a first water distribution plate 111 and a second water distribution plate 113. The water distribution plates are arranged vertically, and multiple water outlet holes are distributed on the water distribution plates in a racetrack pattern to disperse and buffer the water flow, making the water flow velocity more uniform. The water flow direction is from top to bottom. The first water distribution plate 111 is located above the second water distribution plate 113. The first water distribution plate 111 has a drainage groove, and multiple water outlet holes are arranged around the bottom surface of the drainage groove. This ensures that there is no residue after the water flow passes through the first water distribution plate 111 for the first water distribution. A water baffle plate 112 is provided between the first water distribution plate 111 and the second water distribution plate 113. The water baffle plate 112 is used to disperse and buffer the water flow, so that the water flow after the second water distribution through the second water distribution plate 113 is more stable and uniform.

[0055] Working Principle: When in use, if the cooling tank 3 is ice-free, the ice storage mode of the sparkling water machine needs to be activated first. The evaporator tube 31 operates at high power for cooling, and the stirring end 32 of the mixer agitates the cooling medium, resulting in more uniform heat exchange and faster cooling. The cooling medium gradually freezes from the evaporator tube 31 outwards, with the ice layer gradually increasing in thickness. When the ice layer covers the needle closest to the ice layer probe 5 on the evaporator tube 31, the other two needles remain in a conductive state, and the evaporator tube 31 operates at low power for cooling. When the ice layer covers the two needles closest to the ice layer probe 5 on the evaporator tube 31, both needles are de-energized, and the evaporator tube 31 stops cooling, exiting the ice storage mode. At this time, the sparkling water machine's water dispensing mode is activated. The control circuit board 9 starts the booster pump 2 based on the detection results of the high and low water level probes 6. This booster pump 2 draws drinking water from the source through the first coil 411 into the mixing tank 1. When the water level in the mixing tank 1 reaches the required level, the booster pump 2 stops pumping water. When the gas cylinder is opened, gas enters the mixing tank 1 and mixes with the water inside to form sparkling water. If the user selects sparkling water, they press the sparkling water button 81 on the outer casing 8. The first solenoid valve 10 is opened, and the outlet check valve 14 automatically opens. The incoming air pressure forces the sparkling water out of the outlet 13 of the mixing tank 1. After being cooled by the second coil 421, the chilled sparkling water is delivered to the user's water cup. If the user selects ice water, they press the ice water button 82 on the outer casing 8. The second solenoid valve 12b is opened, and the drinking water is cooled by the second coil 421, delivering ice water to the user's water cup.

[0056] In this invention, the mixing tank 1 is located inside the cooling box 3 and outside the evaporator tube 31 to maintain a low temperature. The first coil 411 is located on the side of the mixing tank 1 where the evaporator tube 31 is located and below the evaporator tube 31. Drinking water from the first water channel 41 is cooled by the first coil 411 and then injected into the mixing tank 1 through the inlet 11a, thus effectively utilizing the limited space of the household sparkling water machine and ensuring the cooling effect. The booster pump 2 pressurizes the cooled drinking water from the first coil 411 and injects it into the mixing tank 1 through the inlet 11a to mix with the gas introduced into the mixing tank 1 from the air inlet 12a, forming sparkling water. The cooling box 3 is used for cold storage, allowing the first coil 411 to continuously and efficiently deliver cold water to the mixing tank 1. This improves the refilling capacity of the household sparkling water machine and, combined with the high pressure provided by the booster pump 2, fully utilizes the low-temperature, high-pressure environment to significantly improve gas solubility, thus enhancing the bubbly taste of the sparkling water. Furthermore, as... Figure 3 As shown, the mixing tank 1 is a sealed structure, which includes multiple cavities and multiple connecting ribs. The multiple cavities are distributed along the first direction and are interconnected. Connecting ribs are provided between two adjacent cavities. The connecting ribs extend along the second direction to increase the compressive strength of the mixing tank 1.

[0057] The sparkling water machine of this utility model is identical to or can be implemented using existing technologies for the parts not described herein.

[0058] The above embodiments are only used to further illustrate a sparkling water machine of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A sparkling water machine comprising a refrigeration system and a mixing tank, the refrigeration system comprising an evaporation tube, characterized in that: The first water path is connected with the water inlet of the mixing tank; the refrigeration system further comprises a cooling box filled with cooling medium, the mixing tank, the evaporation pipe and the first coil pipe are respectively arranged in the cooling box and contact with the cooling medium, the mixing tank is arranged outside the evaporation pipe, the first coil pipe is arranged on the side of the mixing tank where the evaporation pipe is located and below the evaporation pipe, the mixing tank is cooled by cold preservation, and the drinking water in the first water path is cooled by the first coil pipe and then injected into the mixing tank through the water inlet.

2. The sparkling water machine of claim 1, wherein: The second water path is provided with a second coil pipe arranged in the cooling box and contacting with the cooling medium, and used for cooling drinking water in the second water path; the first coil pipe and the second coil pipe are spirally wound to form a middle cavity, and the first coil pipe and the second coil pipe are staggered in a first direction; the first water path is further provided with a third coil pipe arranged in the middle cavity and connected with the water outlet of the mixing tank, and used for cooling bubble water.

3. The sparkling water machine of claim 1, wherein: The first water path is connected with the water inlet of the mixing tank through the booster pump, the booster pump can pressurize the drinking water cooled by the first coil pipe and inject the drinking water into the mixing tank through the water inlet, so as to mix with the gas introduced into the mixing tank through the air inlet of the mixing tank to form bubble water.

4. The sparkling water machine of claim 1, wherein: The mixing tank is in a sealed structure, comprises a plurality of cavities and a plurality of connecting ribs, the plurality of cavities are distributed along a first direction and are in communication with each other, the connecting ribs are arranged between adjacent two cavities respectively, and the connecting ribs extend along a second direction to increase the compression strength of the mixing tank.

5. The sparkling water machine of claim 4, wherein: The mixing tank is in a vertical structure, and the size of the mixing tank in a third direction is less than 1 / 2 of the size of the mixing tank in a second direction, so as to be flat; the mixing tank is provided with two symmetrically arranged left plates and right plates, one of the left plates and the right plates is located on a side opposite to the evaporation pipe, the left plates and the right plates are corrugated plates with convex parts and concave parts, the convex parts of one of the corrugated plates and the convex parts of the other corrugated plate form the cavities, and the concave parts of one of the corrugated plates and the concave parts of the other corrugated plate are fixedly connected to form the connecting ribs.

6. The sparkling water machine of claim 1, wherein: The cooling box is wrapped with a cold preservation material.

7. The sparkling water machine of claim 3, wherein: The mixing tank is provided with high and low water level probes, the high and low water level probes are electrically connected with the control circuit board respectively, and the high and low water level probes are used for detecting the liquid level in the mixing tank, so that the control circuit board controls whether the booster pump is started according to the detection result of the high and low water level probes; the evaporation pipe is provided with an ice layer probe, and the ice layer probe is connected with the control circuit board, so as to close the refrigeration system when the thickness of the ice layer reaches a requirement.

8. The sparkling water machine of claim 3, wherein: The communication pipeline between the outlet end of the booster pump and the water inlet of the mixing tank is provided with a first one-way valve and a second one-way valve to control the direction and pressure of the water flow after being boosted; the air inlet is connected with an air inlet pipeline, and the air inlet pipeline is provided with a pressure relief valve and an air inlet one-way valve.

9. The sparkling water machine of claim 2, wherein: The three-way valve has an inlet connected with a drinking water source, one outlet connected with the water inlet end of the first water path, and another outlet connected with the water inlet end of the second water path; the water outlet nozzle has one inlet connected with the water outlet end of the first water path through the first electromagnetic valve, and another inlet connected with the water outlet end of the second water path through the second electromagnetic valve; the water outlet nozzle is provided with a plurality of water distribution discs distributed with a plurality of water outlets.

10. The sparkling water machine of claim 3, wherein: The aperture of the water inlet is 1.8cm to 2.2cm, and the air inlet is communicated with the gas cylinder through the air inlet pipeline.

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