Sparkling water machine, sparkling water machine cooling method, and sparkling water preparation method

Abstract

A sparkling water machine, a sparkling water machine cooling method, and a sparkling water preparation method. The sparkling water machine comprises a control system (10), a refrigeration system (20), and a mixing tank (30). The refrigeration system (20) comprises an evaporator tube (22), and further comprises a water tank (40) and an ice layer detector (50) configured to detect the thickness of an ice layer around the evaporator tube (22). Both the mixing tank (30) and the evaporator tube (22) are disposed in the water tank (40) and are immersed in the water in the water tank (40). The ice layer detector (50) is in communication connection with the control system (10). During operation, the ice layer detector (50), upon detecting that the thickness of the ice layer around the evaporator tube (22) is below a set value, sends a refrigeration signal to the control system (10), and the evaporator tube (22) cools the water in the water tank (40); the ice layer detector (50), upon detecting that the thickness of the ice layer around the evaporator tube (22) reaches the set value, sends a refrigeration turn-off signal to the control system (10). The evaporator tube (22) can continuously perform refrigeration until the water around the evaporator tube freezes into ice, so that the water in the water tank (40) approaches 0°C, thereby maximizing cooling of the mixing tank (30).

Description

Sparkling water machine, sparkling water machine cooling method and sparkling water making method TECHNICAL FIELD

[0001] The present application relates to a sparkling water machine, a sparkling water machine cooling method and a sparkling water making method. BACKGROUND

[0002] The sparkling water machine transports carbon dioxide gas and water into a closed mixing tank, so that the carbon dioxide gas is dissolved in water under the action of air pressure to form sparkling water. Since the solubility of carbon dioxide gas will increase with the decrease of water temperature, therefore, the sparkling water machine will use the evaporator to wrap the mixing tank to directly cool the mixing tank, increase the carbon dioxide gas content and make the sparkling water have a cool taste. The evaporator wrapped around the mixing tank cools the mixing tank, which is a conventional setting in the sparkling water machine, directly contacts and maximizes heat transfer efficiency.

[0003] In order to improve the cup storage capacity of the sparkling water machine, that is, to make the sparkling water machine continuously produce more cool-tasting sparkling water at one time, the second generation of sparkling water machine increases the water storage tank based on the first generation product. The water storage tank is also wrapped with an evaporator outside, so that the evaporator wrapped outside the water storage tank will pre-cool the drinking water in the water storage tank, then the cold water in the water storage tank is sent into the mixing tank to mix with the carbon dioxide gas. In this way, the sparkling water machine can pre-store a certain amount of cold water to improve the efficiency of making sparkling water, but the addition of the water storage tank will increase the volume of the sparkling water machine, of course, also increase the equipment cost.

[0004] In order to solve the problems of large volume and high cost, the researchers proposed the design idea of placing the mixing tank in the water storage tank and omitting the evaporator wrapped outside the water storage tank. In this way, the third generation of sparkling water machine only wraps the evaporator outside the mixing tank. The evaporator cools the mixing tank at the same time, and also cools the stored water in the water storage tank. When in use, the stored water in the water storage tank is sent into the mixing tank.

[0005] Although the third generation of bubble water machine omits the evaporator winding outside the storage tank, since the storage water in the storage tank is sent into the mixing tank as drinking water, the storage tank must meet the hygiene requirements, so the storage tank is essentially no different from the mixing tank, both are tank bodies with sealing requirements, the storage tank needs to be sealed and assembled after the mixing tank is installed, which is difficult to produce. In addition, the evaporator winding outside the mixing tank is directly immersed in the storage water in the storage tank, which will directly pollute the drinking water source, especially when the bubble water machine is not used for a long time, it is impossible to guarantee the hygiene standard of the storage water, and the storage water in the storage tank will be treated as "overnight water", which needs to be emptied and properly washed before use. Moreover, when the evaporator winding mixing tank cools the mixing tank, the temperature cannot be too low, otherwise the water in the mixing tank will freeze due to the error of the temperature sensor, once frozen, it will not only be difficult to get water, but also directly damage the machine, therefore, the temperature set by the temperature sensor is usually above 5℃, in order to avoid the continuous cooling of the evaporator causing the bubble water in the mixing tank to freeze, so the bubble water in the mixing tank has an ice-cold taste, but the temperature of the bubble water is above 5℃, theoretically, it can reach 5℃ at the beginning of water production, but after several minutes of continuous work, it basically maintains at 10℃-15℃, the taste is not good, and it cannot reach the degree of ice-cold refreshing, that is, the bubble water produced in the usual working state cannot reach 5℃-10℃, let alone below 5℃, so the storage capacity also needs to be improved. SUMMARY

[0006] The present application provides a bubble water machine, a bubble water machine cooling method and a bubble water making method, which are easy to manufacture, have better taste, stronger storage capacity and higher hygiene standards. The technical solution adopted by the present application to solve its technical problems is:

[0007] The bubble water machine comprises a control system, a refrigeration system and a mixing tank, the control system controls the refrigeration system to start or stop refrigeration, the refrigeration system comprises an evaporation pipe, the water tank and an ice layer detector for detecting the thickness of the ice layer around the evaporation pipe, the mixing tank and the evaporation pipe are arranged in the water tank and are immersed in the water in the water tank, the mixing tank is located on one side of the evaporation pipe, the mixing tank and the evaporation pipe are arranged separately, the ice layer detector is connected with the control system, in operation, when the ice layer detector detects that the thickness of the ice layer around the evaporation pipe is below the set value, the ice layer detector sends a refrigeration signal to the control system, the refrigeration system starts refrigeration, and the evaporation pipe refrigerates the water in the water tank; when the ice layer detector detects that the thickness of the ice layer around the evaporation pipe reaches the set value, the ice layer detector sends a stop refrigeration signal to the control system, the refrigeration system stops refrigeration, and the mixing tank is not frozen or at least not completely frozen inside when the thickness of the ice layer around the evaporation pipe reaches the set value, so that the water outlet of the mixing tank is always in a water outlet state.

[0008] In a preferred embodiment, the refrigeration system has two modes of high-power refrigeration and low-power refrigeration, the ice layer detector sends a high-power refrigeration signal to the control system when no ice layer information is detected, and the ice layer detector sends a low-power refrigeration signal to the control system when the ice layer signal is detected but the thickness of the ice layer does not reach the set value.

[0009] In a preferred embodiment, the evaporation pipe is arranged in a vertical spiral, the mixing tank is flat and is formed by welding a left plate and a right plate symmetrically distributed, and the mixing tank is arranged vertically and the largest area is towards the evaporation pipe.

[0010] In a preferred embodiment, a plurality of inwardly recessed forward ribs are arranged at intervals in the left plate, a plurality of inwardly recessed backward ribs are arranged at intervals in the right plate, the forward ribs and the backward ribs are matched and pressed against each other and are fixedly connected by welding, and the forward ribs or the backward ribs are provided with perforations and are fixedly connected by perforation plug welding.

[0011] In a preferred embodiment, a stirring motor is further included, an output end of the stirring motor is connected with a stirring rod, the stirring rod vertically extends to the middle of the evaporation pipe, and the water tank is wrapped with cold insulation material.

[0012] In a preferred embodiment, water flows into the mixing tank in the form of spray atomization from the water inlet at the top of the mixing tank.

[0013] In a preferred embodiment: the mixing tank is flat, formed by welding of left and right plates symmetrically distributed, the water inlet on the top of the mixing tank is located on the left plate or the right plate, the water inlet on the top of the mixing tank is fixedly connected with the spray nozzle by welding, and the spray nozzle is welded and fixed on the inner side of the left plate or the right plate.

[0014] In a preferred embodiment: it further comprises a water outlet nozzle, the water outlet nozzle comprises a nozzle sleeve, a water distribution disc arranged in the nozzle sleeve, and an upper cover covering the water distribution disc in the nozzle sleeve from above, the water distribution disc comprises an upper water distribution plate, a water blocking plate and a lower water distribution plate arranged in sequence from top to bottom, the upper water distribution plate and the lower water distribution plate are both uniformly provided with a plurality of water outlet holes in the circumferential direction, the outer side wall of the water blocking plate and the inner wall surface of the nozzle sleeve form a water passing gap, and the outer side wall of the lower water distribution plate is attached to the inner wall surface of the nozzle sleeve, and the water outlet of the mixing tank is communicated to the upper cover.

[0015] In a preferred embodiment: the bottom of the upper cover is sequentially provided with a connecting groove, an outer side water outlet groove and a center water outlet groove from outside to inside, the connecting groove is butted with the nozzle sleeve, the upper water distribution plate is embedded in the outer side water outlet groove and the outer side wall of the upper water distribution plate is attached to the inner wall surface of the outer side water outlet groove, the outer side water outlet groove is provided with a water inlet connector one communicated with the water outlet of the mixing tank, and the water outlet holes of the upper water distribution plate are aligned with the outer side water outlet groove; the middle part of the top surface of the upper water distribution plate is provided with a sink groove, the sink groove is butted with the center water outlet groove, a plurality of water leakage holes are uniformly arranged in the circumferential direction on the sink groove, and the center water outlet groove is provided with a water inlet connector two.

[0016] In a preferred embodiment: it further comprises a first waterway coil pipe, the input end of the first waterway coil pipe is connected with a drinking water source, the water outlet end is connected with the water inlet of the mixing tank, the first waterway coil pipe is arranged in the water tank and soaked in the water of the water tank, and when the thickness of the ice layer around the evaporation pipe reaches a set value, the liquid inside the first waterway coil pipe is not frozen so that the liquid in the first waterway coil pipe is in a flowable state.

[0017] In a preferred embodiment: it has a first water outlet and a second water outlet, water sprayed into the mixing tank through the first waterway coil pipe to mix with carbon dioxide gas to form bubble water, and then output from the water outlet of the mixing tank to form the first water outlet; it further comprises a second waterway coil pipe, the input end of the second waterway coil pipe is connected with a drinking water source, the second waterway coil pipe is arranged in the water tank and soaked in the water of the water tank, and when the thickness of the ice layer around the evaporation pipe reaches a set value, the liquid inside the second waterway coil pipe is not frozen so that the liquid in the second waterway coil pipe is in a flowable state, and water is output through the second waterway coil pipe to form the second water outlet; the first waterway coil pipe and the second waterway coil pipe are sleeved together and placed below the evaporation pipe.

[0018] In a preferred embodiment, a one-way valve is arranged on the gas path for adding carbon dioxide gas to the mixing tank, a booster pump and a one-way valve are arranged on the water path for adding liquid to the mixing tank, and a water level detector is further arranged for detecting the liquid level in the mixing tank, the water level detector and the booster pump are in communication connection with the control system, and in operation, the water level detector transmits a stop water supply signal to the control system when detecting that the liquid level in the mixing tank reaches an upper limit water level value, the control system controls the booster pump to stop, and the water level detector transmits an open water supply signal to the control system when detecting that the liquid level in the mixing tank drops to a lower limit water level value, the control system controls the booster pump to start and supply water to the mixing tank.

[0019] The bubble water machine comprises a control system, a refrigeration system and a mixing tank, the control system controls the refrigeration system to start or stop refrigeration, the refrigeration system comprises an evaporation pipe, a water tank and an ice layer detector for detecting the thickness of the ice layer around the evaporation pipe, the mixing tank and the evaporation pipe are arranged in the water tank and are immersed in the water in the water tank, the mixing tank and the evaporation pipe are arranged separately, the evaporation pipe surrounds the mixing tank but is spaced apart therefrom, the ice layer detector is in communication connection with the control system, and in operation, the ice layer detector transmits a refrigeration signal to the control system when detecting that the thickness of the ice layer around the evaporation pipe is below a set value, the refrigeration system starts refrigeration, and the evaporation pipe refrigerates the water in the water tank; the ice layer detector transmits a stop refrigeration signal to the control system when detecting that the thickness of the ice layer around the evaporation pipe reaches the set value, the refrigeration system stops refrigeration, and the water outlet of the mixing tank is always in a water outlet state when the thickness of the ice layer around the evaporation pipe reaches the set value.

[0020] The bubble water machine cooling method comprises the following steps: immersing a mixing tank and an evaporation pipe of a refrigeration system in a cooling liquid (such as water), separating the mixing tank from the evaporation pipe, and setting the shortest distance between the mixing tank and the evaporation pipe as L1; in the process of refrigerating the cooling liquid by the evaporation pipe, the cooling liquid gradually freezes from the surface of the evaporation pipe outward, and when the thickness of the ice layer reaches L2, the evaporation pipe stops refrigerating the cooling liquid, and L2≤L1. Therefore, the ice layer is not allowed to extend to the mixing tank, and the mixing tank is immersed in the mixture of ice and liquid.

[0021] In a preferred embodiment, when the thickness of the ice layer reaches L3, the evaporation pipe refrigerates in a low-power mode, L3≤L2, when the thickness of the ice layer is between L2 and L3, the evaporation pipe refrigerates in a low-power mode, and when the thickness of the ice layer is less than L2, the evaporation pipe refrigerates in a high-power mode, i.e., a normal refrigeration mode.

[0022] In a preferred embodiment: the cooling liquid is contained in a water tank which does not need to be sealed, when the ice layer reaches a thickness of L2, the evaporative pipe stops cooling the cooling liquid, at this time the temperature of the cooling liquid in the water tank is between 0.2℃-1.5℃, or about 1℃.

[0023] In a preferred embodiment: the mixing tank adopts a flat structure and is located on one side of the evaporative pipe.

[0024] The method for making sparkling water comprises: using a booster pump to pump water into a mixing tank, using a carbon dioxide gas pipeline to input carbon dioxide gas into the mixing tank, arranging at least two one-way valves in the water path between the booster pump and the mixing tank, arranging at least one one-way valve on the carbon dioxide gas pipeline, keeping the pressure of the carbon dioxide gas pipeline constant before the one-way valve, during the first start-up, first, the booster pump pumps water into the mixing tank, and the booster pump stops when the water level detector detects that the liquid level in the mixing tank reaches the upper limit water level value, then, the carbon dioxide gas is input into the mixing tank through the pipeline to form sparkling water, during the process of outputting the sparkling water, the gas pressure in the mixing tank pushes the sparkling water out of the mixing tank, and the carbon dioxide gas is synchronously supplemented into the mixing tank when the mixing tank outputs the sparkling water, when the booster pump detects that the liquid level in the mixing tank drops to the lower limit water level value, the booster pump starts to supplement water, and the liquid level in the mixing tank squeezes the carbon dioxide gas in the mixing tank to increase the gas pressure in the mixing tank during the rising process of the liquid level in the mixing tank, and finally, the booster pump stops when the water level detector detects that the liquid level in the mixing tank reaches the upper limit water level value.

[0025] In a preferred embodiment: the pressure of the carbon dioxide gas pipeline before the one-way valve is set to be 60-80 psi, the pressure of the booster pump for supplementing water is 1.0-1.4 mpa, when the liquid level in the mixing tank reaches the upper limit water level value, the liquid occupies 70%-85% of the space in the mixing tank, and when the liquid level in the mixing tank drops to the lower limit water level value, the liquid occupies 40%-60% of the space in the mixing tank.

[0026] Compared with the background art, the technical scheme has the following advantages:

[0027] 1. The mixing tank and the evaporative pipe are arranged separately in the present application, that is, the mixing tank and the evaporative pipe are not in contact and are immersed in water, the evaporative pipe can continuously cool until the water around the evaporative pipe is frozen into ice, the ice naturally spreads outward from the evaporative pipe, and the cooling stops when a set value is reached, therefore, the water in the water tank can be cooled to the maximum extent to approach 0℃, so that the mixing tank can be cooled to the maximum extent, the mixing tank is immersed in ice water close to 0℃, the temperature is lowered to the minimum, the storage capacity is stronger, and the solubility of carbon dioxide gas is increased, so that the taste of the sparkling water is better.

[0028] 2. The mixing tank is immersed in the water in the water tank, the drinking water directly enters the mixing tank, the water in the water tank is only used as a refrigerant but not drinking water, and the water in the water tank does not enter the mixing tank, so it is more sanitary. Moreover, the water tank only stores cooling water, and the water tank does not need to be sealed, so the structure is simple, the production and manufacturing of the machine are easy to carry out, and the machine has the advantages of low cost.

[0029] 3. The refrigeration system has two modes of high-power refrigeration and low-power refrigeration, the high-power refrigeration can quickly cool the water in the water tank when starting, and the low-power refrigeration can maintain the ice layer around the evaporating pipe during normal use, so that the water in the water tank is always in a state of ice-water fusion, and the temperature of the water is always kept at a low temperature, that is, close to 0℃, so that the heat exchange rate of the mixing tank is higher, the water temperature is more stable, and the storage capacity is stronger.

[0030] 4. The mixing tank is flat and the largest side faces the evaporating pipe, which not only maximizes the heat exchange rate of the mixing tank close to the evaporating pipe, that is, the evaporating pipe cools the mixing tank most quickly and directly, but also has higher pressure resistance, so that the pressure of the carbon dioxide gas in the mixing tank can be increased without worrying about cracking of the mixing tank, further improving the solubility of carbon dioxide gas in water, making the taste of bubble water better, and the water outlet speed stronger and faster.

[0031] 5. The left plate and the right plate are fixed by rib pressing and welding, further improving the strength of the mixing tank, and the perforated plug welding can provide very strong connection strength in the local area, without the need for comprehensive welding of the entire rib, which not only saves time and materials, but also avoids problems such as deformation or excessive heat-affected zone caused by comprehensive welding.

[0032] 6. The stirring rod stirs the water in the water tank, making the water temperature in the water tank more uniform and the cooling efficiency higher.

[0033] 7. The water inlet of the mixing tank adopts a spray atomization method, small water molecules are formed in the mixing tank, the surface area of the water is increased, the contact area between gas molecules and water molecules is increased, and the water-gas mixing effect is improved, and the taste of bubble water is improved.

[0034] 8. The water outlet nozzle is provided with a water distribution disc, after the bubble water in the mixing tank is transported to the water outlet nozzle, it is dispersed and buffered through the water outlet hole, the water baffle makes the water flow uniformly from all around, and finally flows out from the water outlet hole, which not only makes the water outlet uniform and stable, but also more gentle, and the water outlet direction is stable downward without deviation.

[0035] 9. The center water outlet groove is provided with a water inlet connector II, so that the water outlet nozzle can be connected to two water paths. The water inlet connector I is connected to the water outlet of the mixing tank to output bubble water. The water inlet connector II is connected to other water paths, such as a water path of a delivery pipeline, a long-distance stay water tank, etc. The temperature of the water in the water path is reduced, so that low-temperature water, such as ice water, can be directly output. At the same time, the sink of the water distribution plate can avoid water remaining on the upper water distribution plate, so as to ensure cleanliness and hygiene.

[0036] 10. The first water path coil pipe is also immersed in the cooling water in the water tank. The drinking water is cooled in the process of passing through the first water path coil pipe before entering the mixing tank. When the bubble machine frequently produces water, the drinking water entering the mixing tank has a lower temperature, so as to ensure the ice-cold taste of the bubble water and improve the cup storage capacity. BRIEF DESCRIPTION OF DRAWINGS

[0037] The application will be further described below in combination with the drawings and examples.

[0038] Fig. 1 shows a perspective view of the bubble water machine of the application.

[0039] Fig. 2 shows a side view of the bubble water machine shown in Fig. 1.

[0040] Fig. 3 shows a perspective view of the bubble water machine shown in Fig. 1 with the side decorative cover removed.

[0041] Fig. 4 shows a perspective view of the bubble water machine shown in Fig. 1 with the side decorative cover and the water tank removed.

[0042] Fig. 5 shows another perspective view of the bubble water machine shown in Fig. 1 with the side decorative cover and the water tank removed.

[0043] Fig. 6 shows a perspective view of the water tank and the mixing tank of the bubble water machine shown in Fig. 1 in a disassembled state.

[0044] Fig. 7 shows another perspective view of the water tank and the mixing tank of the bubble water machine shown in Fig. 1 in a disassembled state.

[0045] Fig. 8 shows a perspective view of the first water path coil pipe and the second water path coil pipe of the bubble water machine shown in Fig. 1 in a disassembled state.

[0046] Fig. 9 shows a perspective view of the mixing tank, the first water path coil pipe and the second water path coil pipe of the bubble water machine shown in Fig. 1.

[0047] Fig. 10 shows another perspective view of the mixing tank, the first water path coil pipe and the second water path coil pipe of the bubble water machine shown in Fig. 1.

[0048] Fig. 11 shows a longitudinal sectional view of the mixing tank of the bubble water machine shown in Fig. 1 at the water inlet position thereof.

[0049] Fig. 12 shows a longitudinal sectional view of the mixing tank of the bubble water machine of Fig. 1 along the rib position.

[0050] Fig. 13 shows a perspective view of the water outlet nozzle of the bubble water machine of Fig. 1.

[0051] Fig. 14 shows a sectional view of the water outlet nozzle of the bubble water machine of Fig. 1.

[0052] Fig. 15 shows a perspective exploded view of the water outlet nozzle of the bubble water machine of Fig. 1.

[0053] Fig. 16 shows another perspective exploded view of the water outlet nozzle of the bubble water machine of Fig. 1. DETAILED DESCRIPTION

[0054] Referring to Figs. 1-16, the bubble water machine comprises a control system 10, a refrigeration system 20, and a mixing tank 30. The control system 10 controls the refrigeration system 20 to start or stop refrigeration. The refrigeration system 20 comprises an evaporating pipe 22, a water tank 40, and an ice layer detector 50 for detecting the thickness of the ice layer around the evaporating pipe 22. The ice layer detector 50 is in communication with the control system 10. The mixing tank 30 and the evaporating pipe 22 are both arranged in the water tank 40 and are immersed in the water in the water tank 40. The mixing tank 30 is located on one side of the evaporating pipe 22 and is separated from the evaporating pipe 22 (in Fig. 5, the mixing tank 30 is on the left side and the evaporating pipe 22 is on the right side). It can be understood that, after the refrigeration system 20 starts refrigeration, the evaporating pipe 22 cools the water in the water tank 40. Therefore, the water in the water tank 40 is cooled water. Since the mixing tank 30 is immersed in the water in the water tank 40, the mixing tank 30 is also cooled.

[0055] When the evaporating pipe 22 continuously works, the temperature of the water in the water tank 40 continuously decreases, and when the temperature decreases to the freezing temperature, the water begins to freeze. However, since the temperature of the evaporating pipe 22 is the lowest, the freezing gradually spreads from the position of the evaporating pipe 22 to the outside (since the temperature of the evaporating pipe 22 is lower, in fact, when the temperature of the water in the water tank decreases to about 0.8°C, the water contacting the evaporating pipe 22 begins to freeze, so the water in the whole water tank does not freeze at the same time, but gradually freezes from the evaporating pipe 22 to the outside). During the working, if the ice layer detector 50 detects that the thickness of the ice layer around the evaporating pipe 22 is below the set value, the ice layer detector 50 transmits a refrigeration signal to the control system 10, the control system 10 controls the refrigeration system 20 to start refrigeration, and the evaporating pipe 22 refrigerates the water in the water tank 40. During the working, if the ice layer detector 50 detects that the thickness of the ice layer around the evaporating pipe 22 reaches the set value, the ice layer detector 50 transmits a refrigeration stopping signal to the control system 10, the control system 10 controls the refrigeration system 20 to stop refrigeration, and the refrigeration system 20 stops refrigeration. At this time, the water outlet of the mixing tank 30 is always in the water outlet state, that is, although the ice layer appears around the evaporating pipe 22, the liquid in the mixing tank 30 does not freeze, so that the mixing tank 30 can normally output the sparkling water. In fact, if the position close to the evaporating pipe 22 partially freezes, that is, the liquid in the inside does not freeze at least, the water outlet can also be in the water outlet state. Therefore, as long as the distance between the mixing tank 30 and the evaporating pipe 22 is greater than the set value of the thickness of the ice layer, the freezing position will not spread to the mixing tank 30, that is, the distance between the water outlet of the mixing tank 30 and the evaporating pipe 22 is greater than the set value of the thickness of the ice layer, so the water outlet of the mixing tank 30 will not be frozen.

[0056] Since the evaporating pipe 22 refrigerates the water in the water tank 40 until the thickness of the ice layer around the evaporating pipe 22 reaches the set value, the temperature of the cooling water in the water tank can be close to 0°C, the mixing tank 30 is actually soaked in the cooling water mixed with ice water, and the temperature is also close to 0°C. During the normal use, the sparkling water is below 5°C, and even if the water outlet is connected for a long time (for example, after 10 liters of sparkling water are continuously output by the sparkling water machine), the temperature of the sparkling water can be well maintained between 5°C and 10°C, which greatly improves the taste (lower temperature and higher gas content) and the cup storage capacity of the sparkling water.

[0057] The control system 10 is usually realized by a control circuit board. In the embodiment, the control circuit board serving as the control system 10 is arranged on the upper part of the sparkling water machine, and the water tank 40 is arranged on the lower part of the sparkling water machine. Since the water tank 40 only stores the cooling water, there is no other sealing requirement, and the water inlet is arranged on the upper part of the side wall to facilitate the user to add water to the water tank. The top of the water tank 40 is an open port, which can facilitate the accommodation of the mixing tank 30 and the evaporating pipe 22.

[0058] It can be understood that the mixing tank 30 and the evaporating pipe 22 are both immersed in the water in the water tank 40, and the evaporating pipe 22 is cooled until the water around the evaporating pipe is frozen and the thickness of the ice layer reaches a set value, so as to minimize the temperature of the water in the water tank and the temperature of the mixing tank 30, as long as the distance between the mixing tank 30 and the evaporating pipe 22 is far enough, that is, the ice layer does not cause the mixing tank 30 to freeze out of water, therefore, without considering the size of the water tank, the evaporating pipe 22 can also be arranged around the mixing tank 30 and keep a sufficient distance (for example, not less than the set value of the thickness of the ice layer, so as to avoid the mixing tank 30 from freezing), that is, the two are spaced apart, the evaporating pipe 22 does not contact the mixing tank 30, and the two are arranged separately and the distance is greater than the set value of the thickness of the ice layer. Therefore, when the distance between the evaporating pipe 22 and the mixing tank 30 is greater than the set value of the thickness of the ice layer around the evaporating pipe, the mixing tank 30 can be prevented from freezing.

[0059] Preferably, the thickness of the ice layer around the evaporating pipe 22 does not extend to the mixing tank 30, that is, the set value is reached before reaching the mixing tank 30. For example, the shortest distance between the mixing tank 30 and the evaporating pipe 22 is L1, and during the cooling process of the evaporating pipe to the water (that is, the cooling liquid), the cooling liquid gradually freezes from the surface of the evaporating pipe outward, and when the thickness of the ice layer reaches L2, the evaporating pipe stops cooling the cooling liquid, and L2 < L1 or ≤ L1.

[0060] Preferably, the refrigeration system 20 has two modes of large-power refrigeration and small-power refrigeration, and when the ice layer detector 50 does not detect any ice layer information, a large-power refrigeration signal is transmitted to the control system 10, and the refrigeration system 20 is correspondingly started in large-power refrigeration mode. For example, when the device is just started or water is just added to the water tank, the water in the water tank is all liquid and has a high temperature. When the ice layer detector 50 detects an ice layer signal but the thickness of the ice layer does not reach the set value, a small-power refrigeration signal is transmitted to the control system, that is, the evaporating pipe 22 has already appeared frozen around, and the temperature of the water in the water tank is already low, and small-power refrigeration can make the thickness of the ice layer around the evaporating pipe 22 reach the set value more accurately, and the cooling water in the water tank can be more stably maintained at a stable low temperature during work. For example, when the thickness of the ice layer reaches L3, the evaporating pipe is cooled in low-power mode, L3 ≤ L2, when the thickness of the ice layer is between L2 and L3, the evaporating pipe is cooled in low-power mode, and when the thickness of the ice layer is less than L2, the evaporating pipe is cooled in large-power mode, that is, the normal working mode. The temperature of the water in the water tank is maintained below 5°C in the standby state.

[0061] In the embodiment, the ice layer detector 50 is provided with three needle bodies, which are arranged in a straight line and spaced apart from each other, i.e., spaced apart from the evaporating pipe 22 from near to far. When the refrigeration is performed, the three needle bodies are simultaneously immersed in water and in an energized state, which indicates that no ice layer information is detected. When the water begins to freeze outwardly from the evaporating pipe 22, the ice layer thickness gradually spreads outwardly. When the ice layer covers the needle body closest to the evaporating pipe 22, only the remaining two needle bodies are in an energized state, which indicates that the ice layer signal is detected but the ice layer thickness does not reach the set value. When the ice layer thickness continues to expand to cover the two needle bodies close to the evaporating pipe 22, any two needle bodies are in an open circuit (non-conductive) state, which indicates that the ice layer thickness reaches the set value.

[0062] Preferably, the evaporating pipe 22 extends in a vertical spiral manner, and the mixing tank 30 is flat and formed by welding of the left plate 32 and the right plate 34 symmetrically distributed. The mixing tank 30 is vertically arranged and the largest area thereof faces the evaporating pipe 22. Further preferably, the left plate 32 is provided with a plurality of inwardly recessed forward ribs 322 arranged in a spaced apart manner, and the right plate 34 is provided with a plurality of inwardly recessed back ribs 342 arranged in a spaced apart manner. The forward ribs and the back ribs are fixedly connected by welding in a one-to-one matched and abutting manner. Further preferably, the forward ribs or the back ribs are provided with perforations, and the forward ribs and the back ribs are fixedly connected by perforation plug welding.

[0063] Preferably, the stirring motor 60 is further included, and an output end of the stirring motor 60 is connected to the stirring rod 62, which vertically extends to the middle of the evaporating pipe 22 for stirring the water in the water tank.

[0064] Preferably, the water tank 40 is wrapped with a cold insulation material.

[0065] Preferably, the water flow is in the form of spray atomization from the water inlet at the top of the mixing tank 30 into the mixing tank 30. Further preferably, as previously introduced, the mixing tank 30 is flat and formed by welding the left plate 32 and the right plate 34 symmetrically distributed, so the water inlet at the top of the mixing tank is located on the left plate 32 or the right plate 34, and the water inlet at the top of the mixing tank is fixedly connected to the spray water nozzle 70 by welding, and the spray water nozzle 70 is welded and fixed on the inner side of the left plate or the right plate, and in this embodiment, it is connected to the left plate 32. That is, the spray water nozzle 70 is first welded and fixed with the inner side of the left plate 32 or the right plate 34, and then the left plate 32 and the right plate 34 are welded to form the mixing tank. Since the welding position of the spray water nozzle 70 is inside the mixing tank 30, it can be more firmly pressed against the side wall of the mixing tank 30 when under pressure, so that the spray water nozzle 70 is not easily detached. Further preferably, the aperture of the water outlet end of the spray water nozzle 70 is 1.8-2.2 mm. Of course, if the spray water nozzle 70 is not provided, the aperture of the water inlet at the top of the mixing tank 30 is made to be 1.8-2.2 mm, as long as the pressure of the waterway reaches 1.0 mpa or more, the same effect of spray atomization of water inlet can be achieved. In this embodiment, the pressure of the waterway for replenishing the mixing tank 30 is between 1.0 mpa and 1.4 mpa.

[0066] When the mixing tank 30 adopts the spray atomization water inlet mode, the pressure of the carbon dioxide gas source (or the carbon dioxide gas in the mixing tank) is set to 60-80 psi, the pressure of the waterway for replenishing the mixing tank 30 is between 1.0 mpa and 1.4 mpa, and the content of carbon dioxide in the bubble water (volume multiple at 20℃) is not less than 3.5 times.

[0067] Preferably, it also includes a water outlet nozzle 80, which includes a nozzle sleeve 82, a water distribution disc 84 arranged in the nozzle sleeve, and an upper cover 86 covering the water distribution disc in the nozzle sleeve from above. The water distribution disc 84 includes an upper water distribution plate 841, a water baffle plate 842 and a lower water distribution plate 843 arranged in sequence from top to bottom, the upper water distribution plate 842 and the lower water distribution plate 846 are both uniformly provided with a plurality of water outlet holes 844 in the circumferential direction, the outer side wall of the water baffle plate 842 and the inner wall surface of the nozzle sleeve 82 form a water passing gap 845, and the outer side wall of the lower water distribution plate 843 is attached to the inner wall surface of the nozzle sleeve 82, and the water outlet of the mixing tank 30 is connected to the upper cover 86. Therefore, when the bubble water is discharged, the bubble water output from the mixing tank 30 first passes through the water outlet holes of the upper water distribution plate 842 to realize dispersion and buffering, then uniformly flows through the water passing gap 845 between the water baffle plate 842 and the nozzle sleeve 82, and finally uniformly and vertically discharges downward from the water outlet holes of the lower water distribution plate 843. The vertical and moderate water outlet can effectively prevent splashing, which is conducive to the application of the bubble water machine in a larger power working environment.

[0068] Preferably, the bottom of the upper cover 86 is provided with a connecting groove 861, an outer water outlet groove 862 and a center water outlet groove 863 from outside to inside, the connecting groove 861 is connected with the water outlet nozzle by rotating clamping, the upper water distribution plate 841 is embedded in the outer water outlet groove 862, and the outer wall of the upper water distribution plate 841 is attached to the inner wall surface of the outer water outlet groove 862, the outer water outlet groove 862 is provided with a water inlet connector one 864 which is communicated with the water outlet of the mixing tank 30, the water outlet hole 844 of the upper water distribution plate 841 is aligned with the outer water outlet groove 862, so that the bubble water enters the outer water outlet groove 862 and flows downward from the water outlet hole 844 of the upper water distribution plate 841, the middle part of the top surface of the upper water distribution plate 841 is provided with a sink groove 846 which is connected with the center water outlet groove 863, a plurality of water leakage holes 847 are uniformly arranged on the sink groove 846 in the circumferential direction, the center water outlet groove 863 is provided with a water inlet connector two 865 which is connected with the water path after the bubble water, so that other water such as drinking water can be discharged.

[0069] Preferably, the first water path coil pipe 90 is further provided, the input end of the first water path coil pipe 90 is connected with a drinking water source, the water outlet end is connected with the water inlet of the mixing tank 30 (it is clear to those skilled in the art that the connection of the water path mentioned in the present application includes direct connection and indirect connection through other pipelines), the first water path coil pipe 90 is arranged in the water tank 40 and soaked in the water of the water tank, and when the ice layer thickness around the evaporation pipe 22 reaches the set value, the liquid in the first water path coil pipe 90 is in a flowable state, that is, the internal liquid is not frozen, so the distance between the first water path coil pipe 90 and the evaporation pipe 22 is greater than the set value of the ice layer thickness.

[0070] Preferably, the bubble water machine of the present application has a first water outlet waterway and a second water outlet waterway, water is sprayed into the mixing tank 30 along the first waterway coil 90 to mix with carbon dioxide gas to form bubble water, and the bubble water is output from the water outlet of the mixing tank 30 to form the first water outlet waterway, so the first water outlet waterway can output bubble water, and the first water outlet waterway finally reaches the water outlet nozzle 80, sequentially passes through the water outlet hole 844 of the upper water distribution plate 841, the water passing gap 845, and finally flows out from the water outlet hole of the lower water distribution plate 843; and further comprising a second waterway coil 100, the input end of the second waterway coil 100 is connected to a drinking water source, the second waterway coil 100 is arranged in the water tank 40 and is immersed in water in the water tank, and when the ice layer thickness around the evaporation pipe reaches a set value, the liquid inside the second waterway coil 100 is not frozen, so that the liquid in the second waterway coil is in a flowable state (the principle is the same as that of the first waterway coil), and water is output from the second waterway coil 100 to form the second water outlet waterway, so the second water outlet waterway directly outputs ordinary drinking water, that is, ice water cooled by the water in the water tank, and the second water outlet waterway is directly connected to the water inlet connector two 865, sequentially passes through the water leakage hole 847 of the sink groove 846 of the upper water distribution plate 841, the water passing gap 845, and finally flows out from the water outlet hole of the lower water distribution plate 843. In the embodiment, the first waterway coil 90 and the second waterway coil 100 are sleeved together and placed below the evaporation pipe 22.

[0071] The embodiment adds a one-way valve to the gas path of the mixing tank 30, that is, the carbon dioxide gas from the gas cylinder enters the mixing tank after passing through the one-way valve. The water path of the mixing tank 30 adds a booster pump 110 and a one-way valve, that is, the water in the first water path coil 90 enters the mixing tank after passing through the one-way valve under the drive of the booster pump 110, and preferably two or more one-way valves, because if there is only one one-way valve between the booster pump and the mixing tank, the gas in the mixing tank is easy to flow to the booster pump at the moment of starting water supplement, that is, the moment of opening the one-way valve, causing gas leakage. In the embodiment, the booster pump 110 is placed on the upper part of the machine. It also includes a water level detector 120 for detecting the liquid level in the mixing tank 30, and the water level detector 120 and the booster pump 110 are in communication connection with the control system 10. In operation, when the water level detector 120 detects that the liquid level in the mixing tank 30 reaches the upper limit water level value, it sends a stop water supplement signal to the control system 10, and the control system controls the booster pump 110 to stop; when the water level detector 120 detects that the liquid level in the mixing tank 30 drops to the lower limit water level value, it sends an open water supplement signal to the control system 10, and the control system controls the booster pump to start and supplement water to the mixing tank. Since the output pressure of the carbon dioxide gas cylinder (i.e. carbon dioxide gas source) is constant after being set, as long as the gas pressure in the mixing tank 30 is lower than the output gas pressure set by the carbon dioxide gas cylinder, the carbon dioxide gas will automatically supplement into the mixing tank 30 to achieve pressure balance, which is the same as the existing method.

[0072] Therefore, the application also relates to a preparation method of the sparkling water by the sparkling water machine, which comprises the following steps: the cooled water (drinking water, i.e. the water delivered by the first water circuit coil 90) is pumped into the mixing tank 30 by the booster pump 110, a one-way valve is arranged in the water circuit between the booster pump 110 and the mixing tank 30; the carbon dioxide gas is connected to the mixing tank 30 through a pipeline, a one-way valve is arranged on the pipeline for delivering the carbon dioxide gas, and the pressure of the pipeline for delivering the carbon dioxide gas is constant before the one-way valve (i.e. the pressure of the gas cylinder is constant). When the machine is started for the first time, the water is first pumped into the mixing tank 30 by the booster pump 110, and the booster pump stops when the water level detector 120 detects that the liquid level in the mixing tank 30 reaches the upper limit water level value. Then, the carbon dioxide gas is input into the mixing tank 30 through the pipeline, and the pressure in the mixing tank 30 automatically balances with the pressure in the pipeline until the pressure in the mixing tank 30 balances with the pressure in the pipeline, and the sparkling water is formed in the mixing tank 30. In the process of outputting the sparkling water, the water outlet of the mixing tank 30 is opened, the sparkling water in the mixing tank 30 is directly pressed out of the mixing tank, and the carbon dioxide gas is simultaneously supplemented into the mixing tank 30 to maintain the balance between the pressure in the mixing tank 30 and the pressure in the pipeline when the sparkling water is output from the mixing tank. When the booster pump 110 starts to supplement water when the water level detector 120 detects that the liquid level in the mixing tank 30 drops to the lower limit water level value, the liquid level in the mixing tank 30 presses the carbon dioxide gas in the mixing tank 30 in the process of rising, and the gas cannot return to the carbon dioxide cylinder under the action of the one-way valve, so that the pressure in the mixing tank 30 increases, and finally the booster pump 110 stops when the water level detector detects that the liquid level in the mixing tank reaches the upper limit water level value.

[0073] Preferably, the pressure of the pipeline for delivering the carbon dioxide gas is set to 60-80 psi before the one-way valve, i.e. the pressure of the gas cylinder is set to 60-80 psi. The pressure of the water supplemented by the booster pump 110 is 1.0-1.4 mpa. When the liquid level in the mixing tank 30 reaches the upper limit water level value, the liquid occupies 70%-85% of the space of the mixing tank 30, and when the liquid level in the mixing tank drops to the lower limit water level value, the liquid occupies 40%-60% of the space of the mixing tank.

[0074] The above description is only the preferred embodiment of the application, and therefore cannot limit the range of the application, i.e. equivalent changes and modifications made according to the patent range and content of the specification should still be within the range of the application. Industrial applicability

[0075] The application discloses a kind of bubble water machine, bubble water machine cooling method and bubble water production method, including control system, refrigeration system and mixing tank, the refrigeration system includes evaporative pipe, further including water tank and ice layer detector for detecting the ice layer thickness around the evaporative pipe, the mixing tank and evaporative pipe are all arranged in the water tank and immersed in the water of the water tank, the ice layer detector is connected with the control system, when working, the ice layer detector detects the ice layer thickness around the evaporative pipe below the set value and sends refrigeration signal to the control system, and the evaporative pipe is cooled to the water in the water tank;The ice layer detector detects the ice layer thickness around the evaporative pipe reaches the set value and sends the control system to close the refrigeration signal.Evaporative pipe can be continuously cooled until the water around it is frozen into ice, so that the water in the water tank is close to 0 DEG C, and the mixing tank is cooled to the maximum, with industrial practicability.

Claims

1. A sparkling water machine, comprising a control system, a refrigeration system, and a mixing tank, wherein the control system controls the refrigeration system to turn on or off refrigeration, and the refrigeration system includes an evaporation tube, characterized in that: Also include a water tank and ice layer detector for detecting the thickness of ice layer around the evaporation pipe, the mixing tank and evaporation pipe are arranged in the water tank and immersed in the water of the water tank, and the mixing tank is located on one side of the evaporation pipe, the mixing tank and the evaporation pipe are arranged separately, the ice layer detector is connected with the control system, and when working, When the ice layer detector detects that the thickness of the ice layer around the evaporation pipe is below the set value, the ice layer detector transmits a refrigeration signal to the control system, the refrigeration system starts refrigeration, and the evaporation pipe refrigerates the water in the water tank; When the ice layer detector detects that the thickness of the ice layer around the evaporation pipe reaches the set value, the ice layer detector transmits a refrigeration closing signal to the control system, the refrigeration system closes the refrigeration, and the water outlet of the mixing tank is always in a water outlet state when the thickness of the ice layer around the evaporation pipe reaches the set value.

2. The sparkling water machine of claim 1, wherein: The refrigeration system has two modes of large power refrigeration and small power refrigeration, when the ice layer detector does not detect any ice layer information, the ice layer detector transmits a large power refrigeration signal to the control system, and when the ice layer detector detects an ice layer signal but the thickness of the ice layer does not reach the set value, the ice layer detector transmits a small power refrigeration signal to the control system.

3. The sparkling water machine according to claim 1 or 2, characterized in that: The evaporation pipe is arranged in a vertical spiral, the mixing tank is flat and is formed by welding the left plate and the right plate symmetrically distributed, the mixing tank is arranged vertically and the largest area is towards the evaporation pipe.

4. The sparkling water machine of claim 3, wherein: The left plate is provided with a plurality of inwardly recessed forward ribs, the right plate is provided with a plurality of inwardly recessed backward ribs, the forward ribs and the backward ribs are fixedly connected by welding in a one-to-one matched pressing manner, and the forward ribs or the backward ribs are provided with perforations and are fixedly connected by perforation plug welding.

5. The sparkling water machine of claim 3, wherein: Also include a stirring motor, the output end of the stirring motor is connected with a stirring rod, and the stirring rod vertically extends to the middle of the evaporation pipe.

6. The sparkling water machine of claim 1, wherein: The water flows into the mixing tank in the form of spray atomization from the water inlet at the top of the mixing tank.

7. The sparkling water machine of claim 6, wherein: The mixing tank is flat and is formed by welding the left plate and the right plate symmetrically distributed, the water inlet at the top of the mixing tank is located on the left plate or the right plate, the water inlet at the top of the mixing tank is fixedly connected with a spray nozzle by welding, and the spray nozzle is welded and fixed on the inner side of the left plate or the right plate.

8. The sparkling water machine according to claim 6 or 7, characterized in that: Also include a water outlet nozzle, the water outlet nozzle includes a nozzle sleeve, a water distribution disc arranged in the nozzle sleeve, and an upper cover covering the water distribution disc in the nozzle sleeve from above, the water distribution disc includes an upper water distribution plate, a water blocking plate and a lower water distribution plate arranged in the upper cover, the upper water distribution plate and the lower water distribution plate are uniformly provided with a plurality of water outlet holes in the circumferential direction, the outer side wall of the water blocking plate and the inner wall surface of the nozzle sleeve form a water passing gap, the outer side wall of the lower water distribution plate is attached to the inner wall surface of the nozzle sleeve, and the water outlet of the mixing tank is communicated to the upper cover.

9. The sparkling water machine of claim 8, wherein: The bottom of the upper cover is sequentially provided with a connecting groove, an outer water outlet groove and a central water outlet groove from outside to inside, the connecting groove is in butt joint with the nozzle cover, the upper water distribution plate is embedded in the outer water outlet groove and the outer side wall of the upper water distribution plate is attached to the inner wall surface of the outer water outlet groove, the outer water outlet groove is provided with a water inlet connector one in communication with the water outlet of the mixing tank, and the water outlet hole of the upper water distribution plate is aligned with the outer water outlet groove; the middle part of the top surface of the upper water distribution plate is provided with a sink groove, the sink groove is in butt joint with the central water outlet groove, a plurality of water leakage holes are uniformly arranged on the sink groove in the circumferential direction, and the central water outlet groove is provided with a water inlet connector two.

10. The sparkling water machine of claim 3, wherein: The first waterway coil pipe is further provided, an input end of the first waterway coil pipe is connected with a drinking water source, a water outlet end is connected with the water inlet of the mixing tank, the first waterway coil pipe is arranged in the water tank and soaked in water in the water tank, and liquid in the first waterway coil pipe is in a flowable state when the ice layer thickness around the evaporation pipe reaches a set value.

11. The sparkling water machine of claim 10, wherein: The first waterway coil pipe and the second waterway coil pipe are sleeved together and placed below the evaporation pipe.

12. The sparkling water machine of claim 1, wherein: A one-way valve is arranged on a gas path for adding carbon dioxide gas to the mixing tank, a booster pump and a one-way valve are arranged on a water path for adding liquid to the mixing tank, a water level detector for detecting the liquid level in the mixing tank is further included, the water level detector and the booster pump are in communication connection with the control system, when working, the water level detector transmits a stop water replenishing signal to the control system when detecting that the liquid level in the mixing tank reaches an upper limit water level value, the control system controls the booster pump to stop, and the water level detector transmits an open water replenishing signal to the control system when detecting that the liquid level in the mixing tank drops to a lower limit water level value, and the control system controls the booster pump to start to replenish water to the mixing tank.

13. A sparkling water machine comprising a control system, a refrigeration system and a mixing tank, the control system controls the refrigeration system to turn on or turn off the refrigeration, the refrigeration system comprises an evaporation pipe, characterized in that: A water tank and an ice layer detector for detecting the ice layer thickness around the evaporation pipe are further included, the mixing tank and the evaporation pipe are arranged in the water tank and soaked in water in the water tank, the evaporation pipe surrounds the mixing tank but is arranged at intervals therefrom, the ice layer detector is in communication connection with the control system, when working, the ice layer detector transmits a refrigeration signal to the control system when detecting that the ice layer thickness around the evaporation pipe is below a set value, the refrigeration system starts refrigeration, and the evaporation pipe refrigerates water in the water tank; The ice layer detector sends a signal to the control system to stop the refrigeration when the ice layer thickness around the evaporator tube reaches a set value, the refrigeration system stops refrigeration, and the outlet of the mixing tank is always in a water outlet state when the ice layer thickness around the evaporator tube reaches a set value.

14. A cooling method for a sparkling water machine, wherein the mixing tank and the evaporation pipe of the refrigeration system are immersed in a cooling liquid, characterized in that: The shortest distance between the mixing tank and the evaporator tube is L1, and the cooling liquid gradually freezes from the surface of the evaporator tube during the refrigeration process, and the evaporator stops refrigerating the cooling liquid when the ice layer thickness reaches L2, and L2≤L1.

15. The sparkling water machine cooling method of claim 14, wherein: When the ice layer thickness reaches L3, the evaporator tube refrigerates in low-power mode, L3≤L2, when the ice layer thickness is between L2 and L3, the evaporator tube refrigerates in low-power mode, and when the ice layer thickness is less than L2, the evaporator tube refrigerates in high-power mode.

16. The sparkling water machine cooling method of claim 14, wherein: The cooling liquid is stored in the water tank, and when the ice layer thickness reaches L2, the evaporator stops refrigerating the cooling liquid, and at this time the temperature of the cooling liquid in the water tank is between 0.2℃ and 1.5℃.

17. The sparkling water machine cooling method of claim 14, wherein: The mixing tank adopts a flat structure and is located on one side of the evaporator tube.

18. A method of making sparkling water, water is pumped into a mixing tank by a booster pump, carbon dioxide gas is connected to the mixing tank through a pipe, characterized in that: At least two one-way valves are arranged in the water path between the booster pump and the mixing tank, and at least one one-way valve is arranged in the pipe for conveying carbon dioxide gas, and the pressure of the pipe for conveying carbon dioxide gas is constant before the one-way valve. When starting for the first time, the booster pump first pumps water into the mixing tank, and the booster pump stops when the water level detector detects that the liquid level in the mixing tank reaches the upper limit water level value. Then, carbon dioxide gas is input into the mixing tank through the pipe to form bubble water. In the process of outputting bubble water, the gas pressure in the mixing tank pushes the bubble water out of the mixing tank, and carbon dioxide gas is simultaneously supplemented into the mixing tank when the mixing tank outputs bubble water. When the booster pump detects that the liquid level in the mixing tank drops to the lower limit water level value, the booster pump starts to supplement water. The liquid level in the mixing tank increases and squeezes the carbon dioxide gas in the mixing tank, thereby increasing the gas pressure in the mixing tank. Finally, the booster pump stops when the water level detector detects that the liquid level in the mixing tank reaches the upper limit water level value.

19. The method of producing sparkling water according to claim 18, wherein: The pressure of the pipe for conveying carbon dioxide gas before the one-way valve is set to 60-80psi, the pressure of the booster pump for supplementing water is 1.0mpa-1.4mpa, the liquid occupies 70%-85% of the space in the mixing tank when the liquid level in the mixing tank reaches the upper limit water level value, and the liquid occupies 40%-60% of the space in the mixing tank when the liquid level in the mixing tank drops to the lower limit water level value.

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