Bubble water device

Abstract

The invention discloses a sparkling water device, and relates to the technical field of household electrical appliances, the sparkling water device comprises a shell, a water storage tank, a CO2 gas cylinder and a gas mixing Venturi tube; the shell is provided with a water outlet; the water storage tank is arranged in the shell; the CO2 gas cylinder is detachably arranged in the shell; the gas mixing venturi tube is arranged in the shell and provided with a water inlet end, a gas inlet end and an outlet end, the water inlet end of the gas mixing venturi tube is communicated with the water outlet end of the water storage tank, the gas inlet end of the gas mixing venturi tube is communicated with the gas outlet end of the CO2 gas cylinder, and the outlet end of the gas mixing venturi tube is communicated with the water outlet. The gas mixing venturi tube is used for mixing gas and liquid. The sparkling water device can reduce cost and energy consumption, and meanwhile, the preparation efficiency and quality of sparkling water are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a sparkling water device. Background Art

[0002] The sparkling water device mainly realizes the preparation of sparkling water through the carbonation system components. Among them, the taste, concentration and stability of the sparkling water depend on the structure and process parameters of the carbonation system. At present, the household sparkling water devices on the market generally adopt the carbonation tank structure components. However, for such a sparkling water device, the gas-liquid mixing mainly relies on mechanical stirring or high-pressure direct injection, resulting in low gas-liquid mass transfer efficiency; the structure is complex, leading to high manufacturing costs, large volume and high energy consumption; moreover, the concentration after gas-liquid mixing is significantly affected by factors such as pressure and time, with a low concentration and insufficient stability. Summary of the Invention

[0003] The main object of the present invention is to propose a sparkling water device, aiming to solve at least one of the problems raised in the above background art.

[0004] To achieve the above object, the sparkling water device proposed by the present invention includes a housing, a water storage tank, a CO2 gas cylinder, and a mixing Venturi tube; the housing is provided with a water outlet; the water storage tank is arranged in the housing; the CO2 gas cylinder is detachably arranged in the housing; the mixing Venturi tube is arranged in the housing, and the mixing Venturi tube has a water inlet end, a gas inlet end and an outlet end. The water inlet end of the mixing Venturi tube is communicated with the water outlet end of the water storage tank, the gas inlet end of the mixing Venturi tube is communicated with the gas outlet end of the CO2 gas cylinder, and the outlet end of the mixing Venturi tube is communicated with the water outlet. The mixing Venturi tube is used for mixing gas and liquid.

[0005] In one embodiment, the mixing Venturi tube includes a tube body, the tube body has a main body part, as well as an inlet section, a suction section and an outlet section connected to the main body part. One end of the inlet section is the water inlet end of the mixing Venturi tube, one end of the suction section is the gas inlet end of the mixing Venturi tube, and one end of the outlet section is the outlet end of the mixing Venturi tube; the main body part is provided with a contraction section, a throat section and an expansion section. The inlet section is connected to the contraction section, and both ends of the expansion section are respectively connected to the throat section and the outlet section; the main body part is also provided with a gas cavity, and the suction section is communicated with the throat section through the gas cavity.

[0006] In one embodiment, the volume of the gas cavity is 500 mm 3 -800 mm 3 ; and / or,

[0007] The air cavity is arranged around the outer periphery of the contraction section. The air cavity has a cavity bottom wall close to the throat section and a circumferential wall located on the outer periphery of the contraction section. One end of the throat section opens on the cavity bottom wall. The diameter of the circumferential wall ranges between 10 mm and 15 mm, and along the axial direction of the throat section, the length of the circumferential wall ranges between 5 mm and 9 mm.

[0008] In an embodiment, the suction section has a suction inlet end and a suction outlet end at both ends thereof. The suction inlet end is the air inlet end. The air cavity further has an air cavity guiding wall, and the suction outlet end is arranged corresponding to the air cavity guiding wall.

[0009] In an embodiment, an included angle α is formed between the air cavity guiding wall and the axis of the contraction section, satisfying 30° ≤ α ≤ 40°.

[0010] In an embodiment, one end of the air cavity guiding wall is connected to the circumferential wall, and the other end extends obliquely towards the throat section; or,

[0011] The air cavity further has a cavity top wall opposite to the cavity bottom wall. The cavity top wall is annularly arranged. One end of the air cavity guiding wall is connected to the circumferential wall, and the other end extends obliquely towards the throat section.

[0012] In an embodiment, a nozzle section is further provided at the end of the contraction section close to the throat section. The nozzle section is arranged corresponding to the throat section, and the diameter of the nozzle section is smaller than the diameter of the throat section.

[0013] In an embodiment, at least a part of the nozzle section extends into the throat section.

[0014] In an embodiment, the length of the nozzle section extending into the throat section ranges between 0 mm and 0.6 mm.

[0015] In an embodiment, a throat guiding surface is provided at the end of the throat section close to the nozzle section. The throat guiding surface extends obliquely in a direction away from the throat section in the direction from the throat section to the nozzle section.

[0016] In an embodiment, an included angle β is formed between the throat guiding surface and the axis of the throat section, satisfying 20° ≤ β ≤ 30°.

[0017] In an embodiment, the diameter of the nozzle section is D7, satisfying 1.2 mm ≤ D7 ≤ 1.8 mm; and / or,

[0018] The length of the nozzle section is L7, satisfying 0.6 mm ≤ L7 ≤ 1.5 mm.

[0019] In one embodiment, the diameter of the throat section is D1 and the length is L1, satisfying 1 mm ≤ D1 ≤ 3 mm and 9 mm ≤ L1 ≤ 15 mm.

[0020] In one embodiment, the inner diameter of the inlet section is D2, satisfying 5.5 mm ≤ D2 ≤ 7 mm; and / or,

[0021] the length of the inlet section is L2, satisfying 12 mm ≤ L2 ≤ 18 mm.

[0022] In one embodiment, the inner diameter of the outlet section is D3, satisfying 5.8 mm ≤ D3 ≤ 7 mm; and / or,

[0023] the length of the outlet section is L3, satisfying 180 mm ≤ L3 ≤ 220 mm.

[0024] In one embodiment, the inner diameter of the suction section is D4, satisfying 1 mm ≤ D4 ≤ 4 mm; and / or,

[0025] the length of the suction section is L4, satisfying 13 mm ≤ L4 ≤ 20 mm.

[0026] In one embodiment, the contraction section is tapered from one end of the inlet section in a direction away from the inlet section, and the length of the contraction section is L5, satisfying 8 mm ≤ L5 ≤ 12 mm, and / or,

[0027] the expansion section is tapered from one end of the throat section towards one end of the outlet section, and the length of the expansion section is L6, satisfying 13 mm ≤ L6 ≤ 20 mm.

[0028] In one embodiment, the inner wall surface of the contraction section and the axis of the contraction section have an included angle A, satisfying 12° ≤ A ≤ 15°, and / or,

[0029] the inner wall surface of the expansion section and the axis of the expansion section have an included angle B, satisfying 6° ≤ B ≤ 12°.

[0030] In one embodiment, the inlet section and the contraction section form a water inlet channel, the suction section forms an air inlet channel, the throat section, the expansion section and the outlet section form a mixing channel, the water inlet channel is communicated with the mixing channel, the air inlet channel is communicated with the mixing channel through the air cavity, and the mixing channel is used for mixing gas and liquid.

[0031] In one embodiment, the bubble water device further includes a filtering module, the filtering module is arranged upstream of the water storage tank, the water inlet end of the filtering module is communicated with an external water source, and the water outlet end of the filtering module is communicated with the water inlet end of the water storage tank.

[0032] The bubble water device of the present invention includes a housing, a water storage tank, a CO2 gas cylinder, and a gas-liquid mixing Venturi tube; the housing is provided with a water outlet; the water storage tank is arranged inside the housing; the CO2 gas cylinder is detachably arranged inside the housing; the gas-liquid mixing Venturi tube is arranged inside the housing, and the gas-liquid mixing Venturi tube has a water inlet end, a gas inlet end, and an outlet end. The water inlet end of the gas-liquid mixing Venturi tube is communicated with the water outlet end of the water storage tank, the gas inlet end of the gas-liquid mixing Venturi tube is communicated with the gas outlet end of the CO2 gas cylinder, and the outlet end of the gas-liquid mixing Venturi tube is communicated with the water outlet. The gas-liquid mixing Venturi tube is used for mixing gas and liquid. By adopting the structure of the gas-liquid mixing Venturi tube, CO2 gas is inhaled into the water and mixed and dissolved, and finally bubble water is formed. There is no need for complex high-pressure equipment, which reduces costs and energy consumption, and at the same time ensures the preparation efficiency and quality of bubble water. Compared with the traditional carbonation tank structure, it has a smaller volume and occupies less space, and can make the components of the bubble water device be compactly arranged inside the housing, thereby reducing the overall volume of the bubble water device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the bubble water device provided by the present invention;

[0035] Figure 2 For Figure 1 it is a schematic structural diagram of the gas-liquid mixing Venturi tube in

[0036] Figure 3 For Figure 2 it is a partial enlarged view of M in

[0037] Figure 4 For Figure 2 it is a dimension marking diagram of the gas-liquid mixing Venturi tube in

[0038] Figure 5 For Figure 2 it is an angle marking diagram of the gas-liquid mixing Venturi tube in

[0039] Figure 6 For Figure 5 it is a partial enlarged view of N in

[0040] Explanation of the reference numerals in the drawings:

[0041] 1. Bubble water device; 10. Housing; 11. Water outlet; 20. Water storage tank; 30. CO2 gas cylinder;

[0042] 40. Mixing Venturi tube; 40a. Water inlet end; 40b. Air inlet end; 40c. Outlet end;

[0043] 41. Main body; 411. Converging section; 412. Throat section; 412a. Throat guiding surface; 413. Diverging section; 414. Air cavity; 414a. Bottom wall of the cavity; 414b. Circumferential wall; 414c. Air cavity guiding wall; 414d. Top wall of the cavity; 415. Nozzle section;

[0044] 42. Inlet section; 43. Suction section; 44. Outlet section; 50. Filter module.

[0045] The realization, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0049] The bubble water device mainly realizes the preparation of bubble water through the carbonation system components. Among them, the taste, concentration and stability of the bubble water depend on the structure and process parameters of the carbonation system.

[0050] At present, household bubble water devices on the Chinese market are mainly divided into the following three categories: (1) High-pressure gas cylinder direct injection type: A high-pressure CO2 gas cylinder is used to directly inject gas into the water tank, and the gas flow is controlled by a manual or electric valve. It is easy to operate and has a small volume. However, there are problems such as short gas-water contact time, low mixing efficiency, uneven bubbles, and unstable carbonation concentration due to pressure fluctuations in the gas cylinder. (2) Carbonation tank type: Gas is automatically replenished into the carbonation tank, and water enters the carbonation tank in a spray form. The atomization effect of the water spray nozzle directly affects the gas-liquid mixing effect and the concentration of bubble water. This carbonation system has complex mechanical structures, high failure rates, high maintenance costs, high stirring energy consumption, significant noise, limited gas-liquid contact area, and still unsatisfactory mass transfer efficiency. (3) Pre-inflated disposable capsule machine structure: Pre-filled CO2 capsules or cartridges are used, and gas is released into the water tank through a puncturing device. It is highly portable and does not require an external gas source. However, there are problems such as high capsule costs, the need to discard them after single use, uncontrollable gas release speed, poor mixing uniformity, poor environmental protection, and the generation of a large amount of plastic waste.

[0051] At present, carbonation tank structural components are commonly used in household bubble water devices on the market. However, for such bubble water devices, gas-liquid mixing mainly relies on mechanical stirring or high-pressure direct injection, resulting in low gas-liquid mass transfer efficiency; complex structures lead to high manufacturing costs, large volumes, and high energy consumption; moreover, the concentration after gas-liquid mixing is significantly affected by factors such as pressure and time, with a low concentration and insufficient stability.

[0052] The present invention proposes a bubble water device that can solve at least one of the foregoing technical problems. The bubble water device of the present invention can be one of an under-counter water purifier, a tabletop water dispenser, a floor-standing water purifier, a water dispenser, or other types of drinking water equipment.

[0053] Please refer to Figure 1 , in an embodiment of the present invention, the bubble water device 1 includes a housing 10, a water storage tank 20, a CO2 gas cylinder 30, and a gas mixing Venturi tube 40; the housing 10 is provided with a water outlet 11; the water storage tank 20 is arranged inside the housing 10; the CO2 gas cylinder 30 is detachably arranged inside the housing 10; the gas mixing Venturi tube 40 is arranged inside the housing 10, and the gas mixing Venturi tube 40 has a water inlet end 40a, a gas inlet end 40b, and an outlet end 40c. The water inlet end 40a of the gas mixing Venturi tube 40 is communicated with the water outlet end of the water storage tank 20, the gas inlet end 40b of the gas mixing Venturi tube 40 is communicated with the gas outlet end of the CO2 gas cylinder 30, and the outlet end 40c of the gas mixing Venturi tube 40 is communicated with the water outlet 11. The gas mixing Venturi tube 40 is used to mix gas and liquid.

[0054] Specifically, the housing 10 is arranged in a cuboid shape and can be made of ABS engineering plastic, which is lightweight, durable and easy to process. The front of the housing 10 is provided with a water outlet 11, and the water outlet 11 is a circular through hole. The water storage tank 20 is arranged inside the housing 10 and can be made of food-grade PP plastic. The bottom of the water storage tank 20 is provided with a water outlet end, and the water outlet end is connected to the inlet end 40a of the gas mixing Venturi tube 40 through a food-grade silica gel hose. The other end of the hose is connected to the inlet end 40a of the gas mixing Venturi tube 40. The water storage tank 20 is used to store purified water or filtered water. The water storage tank 20 can be configured to be detachably connected to the housing 10, or fixedly installed inside the housing 10 through a bracket or the like. The water in the water storage tank 20 can be directly replenished with purified water by the user into the water storage tank 20, or can also be directly connected to the municipal tap water and flow into the water storage tank 20 after being filtered by the filtration module 50.

[0055] The CO2 gas cylinder 30 is detachably arranged inside the housing 10 and can be made of aluminum alloy material, meeting the food-grade safety standard. The CO2 gas cylinder 30 is filled with high-pressure CO2 gas, and its gas outlet end is provided with a standard thread interface, which is connected to the inlet end 40b of the gas mixing Venturi tube 40 through a stainless steel gas pipe. A quick-release joint connected to the CO2 gas cylinder 30 is provided on the gas pipe, facilitating the replacement of the CO2 gas cylinder 30.

[0056] The gas mixing Venturi tube 40 is arranged in the middle area inside the housing 10 and can be injection-molded from food-grade POM plastic, having good wear resistance and corrosion resistance. The inlet end 40a of the gas mixing Venturi tube 40 is connected to the water outlet end of the water storage tank 20 through the above-mentioned silica gel hose, the inlet end 40b is connected to the gas outlet end of the CO2 gas cylinder 30 through a stainless steel gas pipe, and the outlet end 40c is connected to the water outlet 11 through another silica gel hose.

[0057] The gas mixing Venturi tube 40 is used to mix gas and liquid. The CO2 gas in the CO2 gas cylinder 30 will flow into the gas mixing Venturi tube 40 through the inlet end 40b, and the water in the water storage tank 20 will flow into the gas mixing Venturi tube 40 through the inlet end 40a. Under the action of the gas mixing Venturi tube 40, using the Venturi effect (the change in fluid flow velocity leads to a pressure difference), the CO2 gas is inhaled into the water and mixed and dissolved, and finally the bubble water flows to the water outlet 11 through the outlet end 40c of the gas mixing Venturi tube 40 for the user to drink the bubble water.

[0058] The water storage tank 20, the CO2 gas cylinder 30 and the gas mixing Venturi tube 40 can all be fixed on the bracket inside the housing 10 through bolts. The bracket can be made of metal or ABS engineering plastic to ensure the stable installation of each component.

[0059] In this embodiment, the structure of the gas-mixing Venturi tube 40 is adopted to inhale CO2 gas into water, mix and dissolve it, and finally form bubble water. Without complex high-pressure equipment, the cost and energy consumption are reduced, and at the same time, the preparation efficiency and quality of bubble water are ensured. Compared with the traditional carbonation tank structure, it is smaller in volume and occupies less space, enabling the components of the bubble water device 1 to be compactly arranged in the housing 10, thereby reducing the overall volume of the bubble water device 1. Specifically, compared with the traditional high-pressure carbonation tank solution, complex components such as traditional agitators and circulation pumps are eliminated, and efficient mixing is achieved only through the gas-mixing Venturi tube 40. The number of components is reduced by more than 50%, the volume is reduced by at least 50%, and the weight is reduced by at least 40%, significantly improving portability and space adaptability. The Venturi tube is manufactured by an injection molding process, and the material cost is reduced by about 60%. Moreover, the food-grade material and the sealed connection design ensure water quality safety. The detachable CO2 gas cylinder 30 supports quick replacement, extends the single-use time, and the comprehensive cost is reduced by 50% compared with similar products.

[0060] The bubble water device 1 of the present invention includes a housing 10, a water storage tank 20, a CO2 gas cylinder 30, and a gas-mixing Venturi tube 40; the housing 10 is provided with a water outlet 11; the water storage tank 20 is arranged in the housing 10; the CO2 gas cylinder 30 is detachably arranged in the housing 10; the gas-mixing Venturi tube 40 is arranged in the housing 10. The gas-mixing Venturi tube 40 has a water inlet end 40a, a gas inlet end 40b, and an outlet end 40c. The water inlet end 40a of the gas-mixing Venturi tube 40 is communicated with the water outlet end of the water storage tank 20, the gas inlet end 40b of the gas-mixing Venturi tube 40 is communicated with the gas outlet end of the CO2 gas cylinder 30, and the outlet end 40c of the gas-mixing Venturi tube 40 is communicated with the water outlet 11. The gas-mixing Venturi tube 40 is used to mix gas and liquid. By adopting the structure of the gas-mixing Venturi tube 40, CO2 gas is inhaled into water, mixed and dissolved, and finally bubble water is formed. Without complex high-pressure equipment, the cost and energy consumption are reduced, and at the same time, the preparation efficiency and quality of bubble water are ensured. Compared with the traditional carbonation tank structure, it is smaller in volume and occupies less space, enabling the components of the bubble water device 1 to be compactly arranged in the housing 10, thereby reducing the overall volume of the bubble water device 1.

[0061] Please refer to Figure 2, in one embodiment, the gas - mixing Venturi tube 40 includes a tube body. The tube body has a main body portion 41, as well as an inlet section 42, a suction section 43, and an outlet section 44 connected to the main body portion 41. One end of the inlet section 42 is the water inlet end 40a of the gas - mixing Venturi tube 40, one end of the suction section 43 is the gas inlet end 40b of the gas - mixing Venturi tube 40, and one end of the outlet section 44 is the outlet end 40c of the gas - mixing Venturi tube 40; the main body portion 41 is provided with a contraction section 411, a throat section 412, and a diffusion section 413. The inlet section 42 is connected to the contraction section 411, and both ends of the diffusion section 413 are respectively connected to the throat section 412 and the outlet section 44; the main body portion 41 is further provided with an air cavity 414, and the suction section 43 is communicated with the throat section 412 through the air cavity 414.

[0062] Specifically, the tube body is integrally cylindrical, composed of the inlet section 42, the main body portion 41, the suction section 43, and the outlet section 44, and can be integrally injection - molded with food - grade POM plastic. Of course, in other embodiments, each component of the tube body can be separately arranged for easy production and processing.

[0063] Please refer to Figure 2 , the main body portion 41 includes a contraction section 411, a throat section 412, and a diffusion section 413. The contraction section 411 is located between the inlet section 42 and the throat section 412 and is arranged in a frustum - of - cone shape. The diffusion section 413 is located between the throat section 412 and the outlet section 44 and is also arranged in a frustum - of - cone shape. It should be noted that the contraction section 411, the throat section 412, and the diffusion section 413 all refer to the walls of the regions formed within the main body portion 41 through which water or CO2 gas can flow. While the inlet section 42, the suction section 43, and the outlet section 44 refer to the hollow tubular structures connected to the main body portion 41, which have inner wall surfaces and outer wall surfaces, and correspondingly have inner diameters and outer diameters.

[0064] One end of the inlet section 42 is connected to the large end of the contraction section 411. The small end of the contraction section 411 is correspondingly arranged at one end of the throat section 412. The other end of the throat section 412 is connected to the small end of the diffusion section 413. The large end of the diffusion section 413 is connected to the outlet section 44. The suction section 43 is communicated with the throat section 412 through the air cavity 414. The air cavity 414 is formed in the main body portion 41 of the tube body, is located on the outer periphery of the contraction section 411, and is located on one side of the throat section 412.

[0065] This structural design enables the water flow to gradually increase in velocity and decrease in pressure when passing through the inlet section 42 and entering the contraction section 411. A negative pressure is formed in the throat section 412, and CO2 gas is inhaled through the air cavity 414 and mixed with the high-speed water flow. The reasonable design of the contraction section 411, the throat section 412, and the expansion section 413, as well as the surrounding arrangement of the air cavity 414, ensure the sufficiency and stability of gas-liquid mixing, improve the preparation efficiency and quality of bubble water, have a good gas-liquid mixing effect, and significantly increase the bubble concentration. Among them, the air cavity 414 is arranged around the outer periphery of the contraction section 411. The air cavity 414 is generally arranged as an annular cavity, which can be a regular annular cavity or an irregular cavity, and no specific limitation is made in this regard.

[0066] Please refer to Figure 2 and Figure 3 , further, the annular cavity surrounding the outer parts of the contraction section 411 and the inlet section of the throat section 412 is the air cavity 414. The internal space of the air cavity 414 is connected to the intake pipe. CO2 gas flows from the CO2 gas cylinder 30 through the pressure reducing valve into the intake section of the mixing Venturi tube 40. The pressure of the pressure reducing valve of the CO2 gas cylinder 30 is generally 0.4 Mpa. Under the pressure, the CO2 gas flows into the mixing Venturi tube 40 at a high speed and evenly diffuses in the air cavity 414. An annular intake channel is formed between the outer peripheral wall of the contraction section 411 and the throat section 412. The CO2 gas enters the throat section 412 from the annular channel and instantly forms an air ring flowing deep into the throat section 412. Inside the air ring is the water flow ejected from the outlet of the contraction section 411 into the throat section 412. The CO2 gas meets the water at the outlet of the contraction section 411. Compared with water, the CO2 gas has a higher flow velocity and a lower pressure. In the throat section 412, the water flows towards the gas annular space with a smaller pressure, cutting the gas into larger bubbles. The large bubbles and water flow together towards the expansion section 413. The diameter of the expansion section 413 gradually increases, the fluid flow velocity gradually decreases, and the pressure further increases. The water squeezes the bubbles to become smaller, and a part of the bubbles burst into more and smaller bubbles to balance the water pressure. In the expansion section 413, the mixed fluid generates eddies with a large turbulence intensity. A part of the large bubbles are sheared into small bubbles by the eddies. The decrease in the size of the bubbles increases the specific surface area of gas-liquid mass transfer. During the process of the water flow cutting the bubbles, the film on the surface of the bubbles is simultaneously thinned. The film on the surface of the bubbles is the contact surface of gas-liquid mass transfer. The thinner the film, the smaller the gas-liquid mass transfer resistance, further improving the gas-liquid mass transfer efficiency. CO2 and water are further mixed in the outlet section 44 of the mixing Venturi tube 40 to achieve efficient gas-liquid mass transfer.

[0067] Overall, the structure of the contraction section 411 - throat section 412 - expansion section 413 of the main body 41 forms a multi - stage flow field of speed - increasing, pressure - reducing, and pressure - increasing, enabling the liquid flow rate to increase to 20 - 30 m / s in the throat section 412, with an atomization particle size ≤ 500 μm, and the gas - liquid contact area being 3 - 5 times that of a conventional Venturi tube. Experimental data shows that the carbonation concentration is increased by 25% - 40% compared to the traditional structure under the same gas flow rate. The annular gas cavity 414 surrounding the contraction section 411 serves as a gas storage area, balancing the instantaneous CO2 flow rate fluctuation of ±10%, avoiding the blockage of the flow channel by "gas masses", increasing the stability of the mixing concentration by 60%, and the measured carbonation concentration can reach 4.0 V / V (the industry average is 2.5 V / V).

[0068] Please refer to Figures 2 to 4 , in one embodiment, the volume of the gas cavity 414 is 500 mm 3 - 800 mm 3 ; and / or,

[0069] The gas cavity 414 is arranged around the outer periphery of the contraction section 411. The gas cavity 414 has a bottom wall 414a close to the throat section 412 and a circumferential wall 414b located on the outer periphery of the contraction section 411. One end opening of the throat section 412 is formed on the bottom wall 414a. The diameter range of the circumferential wall 414b is between 10 mm and 15 mm, and along the axial direction of the throat section 412, the length range of the circumferential wall 414b is between 5 mm and 9 mm.

[0070] Specifically, the volume of the gas cavity 414 is 500 mm - 800 mm 3 , preferably, the volume of the container of the gas cavity 414 is 700 mm - 800 mm 3 . The volume of the gas cavity 414 can exemplarily be 500 mm 3 , 550 mm 3 , 600 mm 3 , 650 mm 3 , 700 mm 3 , 710 mm 3 , 720 mm 3 , 730 mm 3 , 740 mm 3 , 750 mm 3 , 760 mm 3 , 770 mm 3 , 780 mm 3 , 790 mm 3 , 800 mm 3 . A gas cavity 414 volume of 500 mm3 - 800 mm 3 forms an optimal gas buffer space, controlling the negative pressure fluctuation amplitude of the throat section 412 within ±5%, improving the negative pressure stability by 30% compared to a conventional Venturi tube.

[0071] It should be noted that the volume of the gas chamber 414 of the gas-blended Venturi tube 40 has a significant impact on the gas-blending effect. The gas chamber 414 is a key structure in the structure of the gas-blended Venturi tube 40 for regulating the gas intake and pre-mixing. Its size directly affects the dynamic balance of the gas-liquid two-phase flow, playing a role in buffering and pre-mixing. As a gas storage area, the gas chamber 414 can balance the instantaneous flow rate fluctuations of the gas, avoiding uneven mixing caused by sudden changes in the gas volume. The larger the volume of the gas chamber 414, the smaller the fluctuation amplitude of the negative pressure in the throat section 412, and the more stable the gas intake process, but the lower the turbulence intensity. When the volume of the gas chamber 414 is too small, the rapid entry of gas into the throat section 412 will intensify local turbulence and promote bubble breakage, but the too-small gas chamber 414 may lead to uneven gas distribution, forming "gas clusters" that block the flow channel and affecting the stability of gas-liquid two-phase mixing. Therefore, controlling the volume of the gas chamber 414 within the range of 500 mm - 800 mm 3 results in a good gas-blending effect.

[0072] The gas chamber 414 is arranged around the outer periphery of the contraction section 411. An annular space is formed between the outer wall of the contraction section 411 and the inner wall of the circumferential wall 414b, constituting the gas chamber 414. The gas chamber 414 has a chamber bottom wall 414a close to the throat section 412 and a circumferential wall 414b located on the outer periphery of the contraction section 411. The inlet of the throat section 412 is located on the chamber bottom wall 414a. The diameter of the circumferential wall 414b is denoted as D8, and the diameter of the circumferential wall 414b is, by way of example, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm. The length of the circumferential wall 414b is denoted as L8, and the length of the circumferential wall 414b is, by way of example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm.

[0073] Please refer to Figure 4 , limiting the diameter D8 of the circumferential wall 414b between 12 mm and 15 mm, and limiting the length L8 of the circumferential wall 414b between 5 mm and 9 mm. With such a design, a uniform annular flow field can be formed for the gas in the gas chamber 414, avoiding local high-pressure areas. The measured gas distribution uniformity is increased by 40%, and the standard deviation of the mixed liquid concentration is reduced to 0.15 V / V (traditional scheme ≥ 0.5 V / V).

[0074] The design of the volume of the gas chamber 414 and the size of the circumferential wall 414b enables the CO2 gas to be evenly distributed in the gas chamber 414, and under the action of the negative pressure in the throat section 412, it stably enters the throat section 412 to mix with the water flow. The appropriate volume of the gas chamber 414 and the size of the circumferential wall 414b not only ensure the storage and buffering of the gas, but also improve the efficiency and stability of gas-liquid mixing, avoiding problems such as uneven gas distribution or excessive flow resistance.

[0075] Furthermore, the air suction section 43 has an air suction inlet end and an air suction outlet end located at both ends thereof, the air suction inlet end is the air inlet end 40b, the air cavity 414 also has an air cavity guide wall 414c, and the air suction outlet end is arranged corresponding to the air cavity guide wall 414c.

[0076] Specifically, the air intake section 43 has an air intake inlet end and an air intake outlet end. The air intake inlet end is the air inlet end 40b, which is connected to the air outlet end of the CO2 gas cylinder 30 through a stainless steel air pipe; the air intake outlet end is located inside the air cavity 414, corresponding to the air cavity guide wall 414c. It can be understood that the air intake outlet end is directly opposite to the air cavity guide wall 414c.

[0077] The air cavity guide wall 414c is an inclined surface in the air cavity 414 and extends obliquely toward the entrance of the throat section 412. The air inhalation outlet is arranged corresponding to the air cavity guide wall 414c. The inclined air cavity guide wall 414c guides the direction of the airflow. The angle of the air cavity guide wall 414c directly affects the gas-liquid mixing effect by regulating the airflow direction, turbulence intensity and negative pressure stability. The air cavity guide wall 414c adjusts the flow velocity distribution of the gas when it enters the throat section 412 by guiding the gas flow direction.

[0078] The air intake outlet is arranged corresponding to the air cavity guide wall 414c, so that the CO2 gas can enter the throat section 412 in an orderly manner along the direction of the guide wall, avoiding turbulence and energy loss caused by the gas directly impacting the inner wall of the throat section 412, improving the flow efficiency of the gas and the mixing effect with the water flow, and further improving the preparation quality of the bubble water.

[0079] See also Figure 5 Furthermore, an angle α is formed between the air cavity guide wall 414c and the axis of the contraction section 411, satisfying 30°≤α≤40°.

[0080] Specifically, an angle α is formed between the air cavity guide wall 414c and the axis of the contraction section 411, and the angle α can be exemplarily 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, and 40°. In this embodiment, α=35°, satisfying 30°≤α≤40°. The guide wall is a smooth inclined surface, which is inclined from the inner surface of the circumferential wall 414b to the center of the throat section 412. The smaller the angle of the air cavity guide wall 414c, the smoother the gas enters the throat, the smaller the pressure loss, and the better the negative pressure adsorption stability. On the contrary, the larger the angle of the air cavity guide wall 414c, the more severe the collision between the gas and the wall, the stronger the shear force, the stronger the turbulence of the air flow into the throat section 412, and the rupture of the gas-liquid interface. However, if the angle is too large, it will lead to excessive energy dissipation and reduced mixing efficiency. Therefore, the angle α is limited to between 30° and 40°.

[0081] The reasonable setting of the included angle α enables the gas to have a proper flow direction and velocity when entering the throat section 412, which not only ensures that the gas can smoothly mix with the high-speed water flow but also avoids problems such as increased flow resistance or insufficient mixing caused by too large or too small an angle. This angle design optimizes the flow field of gas-liquid mixing, improves the mass transfer efficiency, and thus enhances the concentration and quality of the bubble water.

[0082] Meanwhile, the guiding wall included angle of 30° ≤ α ≤ 40° forms the optimal guiding angle, which, while ensuring the stable inflow of gas into the throat, breaks large bubbles into micro-nano scale bubbles (average particle size ≤ 100 μm) through the wall shear force. Experiments show that at this angle, the efficiency of converting gas kinetic energy into turbulent energy is increased by at least 20%, the mass transfer coefficient is increased by at least 15% compared with the 0° direct injection structure, the gas-liquid equilibrium time is significantly shortened by at least 80% (the traditional scheme takes about 60 seconds), and the flow resistance is reduced by at least 25%. Moreover, this structure avoids the turbulent energy loss caused by the gas directly impacting the inner wall of the throat, increases the initial gas-liquid mixing efficiency by at least 30%, and the atomization degree is increased from 26% in the traditional scheme to about 80%.

[0083] Please refer to Figure 3 , in one embodiment, one end of the gas cavity guiding wall 414c is connected to the circumferential wall 414b, and the other end extends obliquely towards the throat section 412; or,

[0084] The gas cavity 414 further has a cavity top wall 414d opposite to the cavity bottom wall 414a. The cavity top wall 414d is arranged in a ring shape. One end of the gas cavity guiding wall 414c is connected to the circumferential wall 414b, and the other end extends obliquely towards the throat section 412.

[0085] Specifically, there are two embodiments of the gas cavity guiding wall 414c. One is that one end is directly connected to the circumferential wall 414b, and the other end extends obliquely towards the throat section 412; the other is that the gas cavity 414 further has a cavity top wall 414d opposite to the cavity bottom wall 414a. The cavity top wall 414d is arranged in a ring shape. One end of the gas cavity guiding wall 414c is connected to the circumferential wall 414b, and the other end extends obliquely towards the throat section 412. The two embodiments of the foregoing gas cavity guiding wall 414c ultimately form a diversion inclined plane, which extends obliquely towards the throat section 412 direction to guide the gas to flow towards the center of the throat section 412.

[0086] This structural design enables the gas to flow orderly along the guiding wall in the gas cavity 414, increases the contact area and mixing time between the gas and the water flow, and improves the uniformity and efficiency of gas-liquid mixing. The setting of the cavity top wall 414d ensures the sealing of the gas cavity 414, prevents gas leakage, and at the same time provides a stable support structure for the guiding wall. Moreover, the setting of the cavity top wall 414d is convenient for production and processing.

[0087] Please refer toFigure 2 and Figure 3 , in one embodiment, a nozzle section 415 is further provided at the end of the contraction section 411 close to the throat section 412. The nozzle section 415 is arranged corresponding to the throat section 412, and the diameter of the nozzle section 415 is smaller than that of the throat section 412.

[0088] Specifically, a nozzle section 415 is provided at the end of the contraction section 411 close to the throat section 412. The diameter of the nozzle section 415 is smaller than that of the throat section 412. The nozzle section 415 is integrally formed with the contraction section 411. The nozzle section 415 is arranged corresponding to the throat section 412 and is located at the end of the contraction section 411. The setting of the nozzle section 415 enables the water flow to form a high-speed jet when entering the throat section 412, further reducing the pressure in the throat section 412 and enhancing the ability to inhale CO2 gas. At the same time, the diameter of the nozzle section 415 is smaller than that of the throat section 412, forming a cross-sectional mutation, which causes strong shearing and mixing effects between the water flow and the gas in the throat section 412, improving the gas-liquid mass transfer efficiency and promoting the formation and refinement of bubbles.

[0089] Please refer to Figure 3 and Figure 6 , in one embodiment, at least a part of the nozzle section 415 extends into the throat section 412. Specifically, at least a part of the nozzle section 415 extends into the throat section 412. The nozzle section 415 is integrally formed with the contraction section 411. A certain gap is left between the part extending into the throat section 412 and the inner wall of the throat section 412 to ensure that the gas can smoothly enter the throat section 412. The design that the nozzle section 415 extends into the throat section 412 enables a stable jet to be formed in the throat section 412 by the high-speed water flow. At the same time, the annular channel between the nozzle section 415 and the inner wall of the throat section 412 provides a uniform inflow path for the CO2 gas, promoting the full mixing of gas and liquid. The appropriate extension length avoids the problems of uneven gas distribution caused by too shallow extension or increased flow resistance caused by too deep extension, optimizes the flow field of gas-liquid mixing, and improves the preparation efficiency of bubble water.

[0090] Furthermore, the length range of the nozzle section 415 extending into the throat section 412 is between 0 mm and 0.6 mm. Specifically, the lengths of the nozzle section 415 extending into the throat section 412 are exemplarily 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, and 0.6 mm. The length of the nozzle section 415 extending into the throat section 412 directly affects the cross-sectional area of the flow channel and the velocity distribution in the throat section 412. When the nozzle section 415 extends into the throat section 412 too shallowly, the nozzle section 415 does not fully extend into the throat section 412, and the gas is unevenly distributed after inhalation, easily forming an "air mass" or a local high-pressure area. The uneven concentration of the mixed liquid easily leads to insufficient contact between the high-speed jet and the inner wall surface of the throat section 412, resulting in a reduction in the range of the negative pressure area and an increase in pressure fluctuation. When the nozzle section 415 extends into the throat section 412 too deeply, the excessive extension of the nozzle section 415 into the throat section 412 will compress the flow channel. Although it can enhance the local flow velocity, it will cause turbulent separation and energy loss, reducing the stability of the negative pressure area. When the depth of the nozzle section 415 is appropriate, a stable shear layer is formed between the jet and the inner wall surface of the throat section 412, with high bubble breakup efficiency and high mixing uniformity. Therefore, the length of the nozzle section 415 extending into the throat section 412 is limited to between 0 mm and 0.6 mm. In this embodiment, the length of the nozzle section 415 extending into the throat section 412 is 0.1 mm, meeting the range of 0 mm - 0.6 mm. The diameter of the nozzle section 415 is 1.5 mm, and the diameter of the throat section 412 is 2 mm. An annular gap is formed between the outer surface of the extended part and the inner surface of the throat section 412.

[0091] This length design enables the high-speed jet of the nozzle section 415 to form a stable negative pressure region in the throat section 412, effectively sucking in CO2 gas and mixing it fully with the water flow. The precise control of the extended length ensures the uniformity and stability of the gas-liquid mixture, avoiding problems such as a decrease in mixing efficiency or abnormal flow caused by an improper length, and further improving the quality of the bubble water.

[0092] Please refer to Figure 3 and Figure 6 , in an embodiment, a throat guiding surface 412a is provided at the end of the throat section 412 close to the nozzle section 415. The throat guiding surface 412a extends obliquely in a direction away from the throat section 412 in the direction from the throat section 412 to the nozzle section 415.

[0093] Specifically, a throat guiding surface 412a is provided at the end of the throat section 412 close to the nozzle section 415. The throat guiding surface 412a is an inclined surface in the shape of a truncated cone, which can be understood as the end of the throat section 412 close to the nozzle section 415 being chamfered. The throat guiding surface 412a extends obliquely in a direction away from the throat section 412 in the direction from the throat section 412 to the nozzle section 415.

[0094] The chamfer at the end of the throat section 412 guides the inflow of CO2 gas into the air cavity 414, reducing the resistance of gas flow and preventing the formation of eddies or blockages at the entrance of the throat section 412. If the chamfer is smaller, the degree of turbulence of the gas flowing into the throat section 412 is stronger, there are more eddies, the turbulent shear force is greater, but the energy dissipation is greater; if the chamfer is larger, the degree of turbulence of the gas flowing into the throat section 412 is weaker, there are fewer eddies, the turbulent shear force is smaller, and the energy dissipation is smaller.

[0095] Therefore, a suitable chamfer angle (i.e., the inclination angle of the throat guiding surface 412a) can suppress gas eddies, enhance the stability of the negative pressure zone and increase the turbulent shear force of the gas, significantly affecting the gas-liquid mixing effect of the mixing Venturi tube 40. The design of the inclination angle of the throat guiding surface 412a optimizes the gas flow direction, enabling it to mix more evenly with the high-speed water flow, improving the gas-liquid mass transfer efficiency, promoting the formation and refinement of bubbles, and thus enhancing the concentration and quality of bubble water.

[0096] Please refer to Figure 5 , further, an included angle β is formed between the throat guiding surface 412a and the axis of the throat section, satisfying 20° ≤ β ≤ 30°.

[0097] Specifically, an included angle β is formed between the throat guiding surface 412a and the axis of the throat section 412. The angles of the included angle β are exemplarily 20°, 22°, 24°, 25°, 26°, 28°, 30°. In this embodiment, β = 25°, within the range of 20° ≤ β ≤ 30°. The surface of the throat guiding surface 412a is smooth, and the roughness Ra ≤ 0.8μm, which can ensure smooth gas flow.

[0098] The reasonable setting of the included angle β balances the gas flow resistance and the turbulent shear force, enabling the gas to mix with the water flow at a suitable angle and speed when entering the throat section 412, reducing energy loss and flow resistance, and improving the efficiency and uniformity of gas-liquid mixing. This angle design optimizes the gas flow path, avoiding the retention or turbulence of the gas at the entrance of the throat section 412, and ensuring the stability and high efficiency of the bubble water preparation process.

[0099] Please refer to Figure 2 and Figure 4 , in an embodiment, the diameter of the nozzle section 415 is D7, satisfying 1.2mm ≤ D7 ≤ 1.8mm; and / or,

[0100] the length of the nozzle section 415 is L7, satisfying 0.6mm ≤ L7 ≤ 1.5mm.

[0101] Specifically, the values of the diameter D7 of the nozzle section 415 can be exemplarily 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm. In this embodiment, D7 = 1.5 mm, satisfying 1.2 mm ≤ D7 ≤ 1.8 mm. The values of the length L7 of the nozzle section 415 can be exemplarily 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm. In this embodiment, L7 = 0.8 mm, satisfying 0.6 mm ≤ L7 ≤ 1.5 mm.

[0102] The design of the diameter and length of the nozzle section 415 enables the water flow to obtain sufficient flow velocity and kinetic energy when passing through the nozzle section 415, forming an effective negative pressure in the throat section 412 to inhale CO2 gas and mix with it. Appropriate diameter and length parameters balance the water flow velocity and pressure, avoiding problems such as insufficient flow velocity caused by too large a diameter or increased flow resistance caused by too small a diameter, optimizing the gas-liquid mixing effect, and improving the preparation quality of the bubble water.

[0103] Please refer to Figure 2 and Figure 4 , in an embodiment, the diameter of the throat section 412 is D1 and the length is L1, satisfying 1 mm ≤ D1 ≤ 3 mm and 9 mm ≤ L1 ≤ 15 mm.

[0104] Specifically, the values of the diameter D1 of the throat section 412 can be exemplarily 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm. In this embodiment, D1 = 2 mm, satisfying 1 mm ≤ D1 ≤ 3 mm; the values of the length L1 of the throat section 412 can be exemplarily 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm. In this embodiment, the length L1 = 10 mm, satisfying 9 mm ≤ L1 ≤ 15 mm.

[0105] The design of the diameter and length parameters of the throat section 412 provides a suitable flow channel space for gas-liquid mixing, enabling the high-speed water flow and CO2 gas to be fully mixed and reacted in the throat section 412. Appropriate diameter and length ensure both the water flow velocity and the formation of negative pressure, and also provide sufficient time and space for gas inhalation and mixing, improving the gas-liquid mass transfer efficiency, promoting the formation and refinement of bubbles, and thus enhancing the concentration and quality of the bubble water.

[0106] Please refer to Figure 2 and Figure 4 , in an embodiment, the inner diameter of the inlet section 42 is D2, satisfying 5.5 mm ≤ D2 ≤ 7 mm; and / or,

[0107] the length of the inlet section 42 is L2, satisfying 12 mm ≤ L2 ≤ 18 mm.

[0108] Specifically, the inlet section 42 is cylindrical with a smooth inner wall and is connected to the water outlet end of the water storage tank 20 through a silica gel hose. One end of the inlet section 42 is connected to the water outlet end of the water storage tank 20, and the other end is connected to the large end of the contraction section 411, with the axis being the same as that of the contraction section 411 to ensure that water flow can smoothly enter the contraction section 411. The inner diameter D2 of the inlet section 42 can be exemplarily 5.5 mm, 6 mm, 6.5 mm, or 7 mm. In this embodiment, D2 = 6 mm, satisfying 5.5 mm ≤ D2 ≤ 7 mm. The length L2 of the inlet section 42 can be exemplarily 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, or 18 mm. In this embodiment, the length L2 of the inlet section 42 = 15 mm, satisfying 12 mm ≤ L2 ≤ 18 mm.

[0109] The design of the inner diameter and length of the inlet section 42 ensures the stable inflow of water, providing a basis for the subsequent acceleration of the contraction section 411. The appropriate inner diameter and length avoid problems such as turbulence or excessive pressure loss of the water flow in the inlet section 42, ensuring the stability of the flow field within the entire mixing Venturi tube 40 and improving the reliability of the bubble water preparation process.

[0110] Please refer to Figure 2 and Figure 4 In an embodiment, the inner diameter of the outlet section 44 is D3, satisfying 5.8 mm ≤ D3 ≤ 7 mm; and / or,

[0111] the length of the outlet section 44 is L3, satisfying 180 mm ≤ L3 ≤ 220 mm.

[0112] Specifically, the outlet section 44 is cylindrical with a smooth inner wall and is connected to the water outlet 11 of the housing 10 through a silica gel hose. One end of the outlet section 44 is connected to the large end of the expansion section 413, and the other end is connected to the water outlet 11 of the housing 10, with the axis being the same as that of the expansion section 413 to ensure that the mixed gas-liquid fluid can flow out smoothly. The inner diameter D3 of the outlet section 44 can be exemplarily 5.8 mm, 5.9 mm, 6 mm, 6.1 mm, 6.2 mm, 6.3 mm, 6.4 mm, 6.5 mm, 6.6 mm, 6.7 mm, 6.8 mm, 6.9 mm, or 7 mm. In this embodiment, D3 = 6 mm, satisfying 5.8 mm ≤ D3 ≤ 7 mm. The length L3 of the outlet section 44 can be exemplarily 180 mm, 185 mm, 190 mm, 195 mm, 200 mm, 205 mm, 210 mm, 215 mm, or 220 mm. In this embodiment, L3 = 200 mm, satisfying 180 mm ≤ L3 ≤ 220 mm.

[0113] The inner diameter and length of the outlet section 44 are designed to provide sufficient flow space and time for the gas-liquid mixed fluid, enabling the bubbles to be further stabilized and evenly distributed within the outlet section 44. The appropriate inner diameter and length avoid problems such as excessive pressure fluctuations and flow resistance of the fluid within the outlet section 44, ensuring the stable outflow of the bubble water and enhancing the user experience.

[0114] Please refer to Figure 2 and Figure 4 In one embodiment, the inner diameter of the suction section 43 is D4, satisfying 1 mm ≤ D4 ≤ 4 mm; and / or,

[0115] the length of the suction section 43 is L4, satisfying 13 mm ≤ L4 ≤ 20 mm.

[0116] Specifically, the suction section 43 is cylindrical and can be connected to the outlet end of the CO2 gas cylinder 30 through a stainless steel gas pipe. One end of the suction section 43 is connected to the outlet end of the CO2 gas cylinder 30, and the other end is connected to the gas chamber 414. The axis is perpendicular to the circumferential wall 414b of the gas chamber 414, ensuring that the gas can enter the gas chamber 414 vertically and be evenly distributed.

[0117] The exemplary values of the inner diameter D4 of the suction section 43 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm. In this embodiment, D4 = 2 mm, satisfying 1.5 mm ≤ D4 ≤ 2.5 mm. The exemplary values of the length L4 of the suction section 43 can be 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm. In this embodiment, L4 = 15 mm, satisfying 13 mm ≤ L4 ≤ 17 mm.

[0118] The design of the inner diameter and length of the suction section 43 ensures the stable inflow of CO2 gas, providing appropriate gas flow rate and pressure for the gas chamber 414. The appropriate inner diameter and length avoid pressure loss and flow rate fluctuations during gas flow, ensuring the stability and efficiency of the gas-liquid mixing process and improving the preparation quality of the bubble water.

[0119] Please refer to Figure 2 and Figure 4 In one embodiment, the contraction section 411 is tapered from one end of the inlet section 42 in a direction away from the inlet section 42, and the length of the contraction section 411 is L5, satisfying 8 mm ≤ L5 ≤ 12 mm, and / or,

[0120] The expansion section 413 is tapered from one end of the throat section 412 towards one end of the outlet section 44, and the length of the expansion section 413 is L6, satisfying 13 mm ≤ L6 ≤ 20 mm.

[0121] Specifically, the contraction section 411 is tapered from one end of the inlet section 42 in a direction away from the inlet section 42. The value of the length L5 can be exemplarily 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm. In this embodiment, L5 = 10 mm, satisfying 8 mm ≤ L5 ≤ 12 mm. The expansion section 413 is tapered from one end of the throat section 412 towards one end of the outlet section 44. The value of the length L6 can be exemplarily 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm. In this embodiment, L6 = 15 mm, satisfying 13 mm ≤ L6 ≤ 17 mm.

[0122] The large end of the contraction section 411 is connected to the inlet section 42, and the small end is opposite to the nozzle section 415 of the throat section 412; the small end of the expansion section 413 is connected to the throat section 412, and the large end is connected to the outlet section 44. The axes of each section are aligned to form a smooth transition. The tapered and expanding designs of the contraction section 411 and the expansion section 413 utilize the Venturi effect to accelerate and depressurize the water flow in the contraction section 411 and decelerate and pressurize it in the expansion section 413, forming a good gas-liquid mixing flow field. Appropriate length and angle parameters optimize the flow velocity and pressure changes of the fluid, improve the gas inhalation efficiency and the bubble breakup effect, promote the full mixing of gas and liquid, and enhance the concentration and quality of the bubble water.

[0123] Please refer to Figure 2 and Figure 5 , in one embodiment, the inner wall surface of the contraction section 411 and the axis of the contraction section 411 have an included angle A, satisfying 12° ≤ A ≤ 15°, and / or,

[0124] the inner wall surface of the expansion section 413 and the axis of the expansion section 413 have an included angle B, satisfying 6° ≤ B ≤ 12°.

[0125] Specifically, the inner wall surface of the contraction section 411 and the axis have an included angle A. The angles of the included angle A are exemplarily 12°, 12.5°, 13°, 13.5°, 14°, 14.5°, 15°. In this embodiment, A = 13.5°, within the range of 12° ≤ A ≤ 15°. The inner wall surface of the expansion section 413 and the axis have an included angle B. The angles of the included angle B are exemplarily 6°, 7°, 8°, 9°, 10°, 11°, 12°. In this embodiment, B = 8°, within the range of 6° ≤ B ≤ 10°. The inner wall surfaces of both the contraction section 411 and the expansion section 413 are smooth conical surfaces with a roughness Ra ≤ 0.4 μm.

[0126] The reasonable setting of the included angle A and the included angle B makes the fluid flow velocity and pressure change in the contraction section 411 and the expansion section 413 more uniform and stable, reducing the flow resistance and energy loss. The included angle A of the contraction section 411 promotes the acceleration of the water flow and the formation of negative pressure, and the included angle B of the expansion section 413 helps the recovery of the fluid pressure and the breaking of bubbles. The two work together to optimize the flow field of the gas-liquid mixture, improve the gas-liquid mass transfer efficiency, and thus improve the preparation quality of the bubble water.

[0127] In one embodiment, the inlet section 42 and the contraction section 411 form an inlet channel, the air suction section 43 forms an air inlet channel, the throat section 412, the expansion section 413 and the outlet section 44 form a mixing channel. The inlet channel and the mixing channel are connected, and the air inlet channel is connected to the mixing channel through the air cavity 414. The mixing channel is used to mix gas and liquid.

[0128] Specifically, the inlet channel is composed of the inlet section 42 and the contraction section 411. The inner diameter of the inlet section 42 can be set to 6 mm, the large end inner diameter of the contraction section 411 can be set to 6 mm, and the small end inner diameter can be set to 1.5 mm, thus forming a gradually shrinking water flow channel. The air inlet channel is composed of the air suction section 43 and the air cavity 414. The inner diameter of the air suction section 43 can be set to 2 mm. The air cavity 414 is an annular cavity surrounding the contraction section 411, and the volume can be set to 760 mm 3 . The mixing channel is composed of the throat section 412, the expansion section 413 and the outlet section 44. The inner diameter of the throat section 412 can be set to 2 mm, the small end inner diameter of the expansion section 413 can be set to 2 mm, the large end inner diameter can be set to 6 mm, and the inner diameter of the outlet section 44 can be set to 6 mm, and the length can be set to 200 mm.

[0129] This channel structure design enables the water flow and gas to enter the mixing channel through the inlet channel and the air inlet channel respectively. Inside the mixing channel, using the Venturi effect and the principle of fluid dynamics, efficient gas-liquid mixing is achieved. The gradually shrinking design of the inlet channel accelerates the water flow and forms a negative pressure to suck in gas; the air cavity 414 design of the air inlet channel evenly distributes the gas; the design of the throat section 412, the expansion section 413 and the outlet section 44 of the mixing channel promotes the formation, breaking and stability of bubbles, thereby improving the preparation efficiency and quality of the bubble water, with good gas-liquid mixing effect and significantly increased bubble concentration.

[0130] Please refer to Figure 1 , in one embodiment, the bubble water device 1 further includes a filtering module 50. The filtering module 50 is arranged upstream of the water storage tank 20. The water inlet end 40a of the filtering module 50 is communicated with an external water source, and the water outlet end of the filtering module 50 is communicated with the water inlet end 40a of the water storage tank 20.

[0131] Specifically, the filtration module 50 is arranged upstream of the water storage tank 20. The filtration module 50 may include a PP cotton filter element and an ultrafiltration filter element. The filtration accuracy of the PP cotton filter element can be configured to 5 μm, which is used to remove large particle impurities in water; the filtration accuracy of the ultrafiltration filter element can be configured to 0.01 μm, which is used to remove bacteria, colloids, organic substances, etc. in water. The water inlet end 40a of the filtration module 50 is connected to the water pipe of an external water source in a screwed or clamped manner, and the water outlet end is communicated with the water inlet end 40a of the water storage tank 20 through a silica gel hose, also in a screwed or clamped manner.

[0132] The arrangement of the filtration module 50 ensures that the water entering the water storage tank 20 is fully filtered to meet the drinking water standard, improving the hygienic quality of the bubble water. The combined filtration of the PP cotton filter element and the ultrafiltration filter element effectively removes impurities and harmful substances in water, providing a clean water source for subsequent gas-liquid mixing and bubble water preparation, and ensuring the health of users.

[0133] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A sparkling water device, characterized in that, Comprising: A housing provided with a water outlet; A water storage tank disposed within the housing; A CO2 gas cylinder removably disposed within the housing; And A mixing Venturi tube disposed within the housing, the mixing Venturi tube having a water inlet end, a gas inlet end, and an outlet end. The water inlet end of the mixing Venturi tube is in communication with the water outlet end of the water storage tank, the gas inlet end of the mixing Venturi tube is in communication with the gas outlet end of the CO2 gas cylinder, and the outlet end of the mixing Venturi tube is in communication with the water outlet. The mixing Venturi tube is used for mixing gas and liquid.

2. The sparkling water device according to claim 1, characterized in that, The mixing Venturi tube includes a tube body having a main body portion, as well as an inlet section, a suction section, and an outlet section connected to the main body portion. One end of the inlet section is the water inlet end of the mixing Venturi tube, one end of the suction section is the gas inlet end of the mixing Venturi tube, and one end of the outlet section is the outlet end of the mixing Venturi tube. The main body portion is provided with a contraction section, a throat section, and a diffuser section. The inlet section is connected to the contraction section, and both ends of the diffuser section are respectively connected to the throat section and the outlet section. The main body portion is further provided with a gas cavity, and the suction section is in communication with the throat section through the gas cavity.

3. The bubble water device according to claim 2, characterized in that, The volume of the air cavity is 500 mm 3 -800 mm 3 ; and / or, The gas cavity is disposed around the outer periphery of the contraction section. The gas cavity has a cavity bottom wall close to the throat section and a circumferential wall located on the outer periphery of the contraction section. One end of the throat section opens on the cavity bottom wall, and the diameter range of the circumferential wall is between 10 mm and 15 mm. Along the axial direction of the throat section, the length range of the circumferential wall is between 5 mm and 9 mm.

4. The sparkling water device according to claim 3, characterized in that, The suction section has a suction inlet end and a suction outlet end at its two ends. The suction inlet end is the gas inlet end. The gas cavity further has a gas cavity guiding wall, and the suction outlet end is disposed corresponding to the gas cavity guiding wall.

5. The bubble water device according to claim 4, wherein, An angle α is formed between the gas cavity guiding wall and the axis of the contraction section, satisfying 30° ≤ α ≤ 40°.

6. The bubble water device according to claim 4, wherein, One end of the gas cavity guiding wall is connected to the circumferential wall, and the other end extends obliquely towards the throat section; Or, The gas cavity further has a cavity top wall opposite to the cavity bottom wall. The cavity top wall is annularly arranged. One end of the gas cavity guiding wall is connected to the circumferential wall, and the other end extends obliquely towards the throat section.

7. The sparkling water device according to claim 4, characterized in that, A nozzle section is further provided at the end of the contraction section close to the throat section. The nozzle section is disposed corresponding to the throat section, and the diameter of the nozzle section is smaller than the diameter of the throat section.

8. The bubble water device according to claim 7, wherein, At least a part of the nozzle section extends into the throat section.

9. The sparkling water device according to claim 8, wherein, The length range of the nozzle section extending into the throat section is between 0 mm and 0.6 mm.

10. The bubble water device according to claim 8, characterized in that, A throat guiding surface is provided at the end of the throat section close to the nozzle section. The throat guiding surface extends obliquely in a direction away from the throat section in the direction from the throat section to the nozzle section.

11. The bubble water device according to claim 10, wherein, An angle β is formed between the throat guiding surface and the axis of the throat section, satisfying 20° ≤ β ≤ 30°.

12. The bubble water device according to claim 7, wherein, The diameter of the nozzle section is D7, satisfying 1.2 mm ≤ D7 ≤ 1.8 mm; and / or, The length of the nozzle section is L7, satisfying 0.6 mm ≤ L7 ≤ 1.5 mm.

13. The sparkling water device according to any one of claims 1 to 12, characterized in that, The diameter of the throat section is D1, and the length is L1, satisfying 1mm ≤ D1 ≤ 3mm and 9mm ≤ L1 ≤ 15mm.

14. The sparkling water device according to any one of claims 1 to 12, characterized in that, The inner diameter of the inlet section is D2, satisfying 5.5mm ≤ D2 ≤ 7mm; and / or, The length of the inlet section is L2, satisfying 12mm ≤ L2 ≤ 18mm.

15. The sparkling water device according to any one of claims 1 to 12, characterized in that, The inner diameter of the outlet section is D3, satisfying 5.8mm ≤ D3 ≤ 7mm; and / or, The length of the outlet section is L3, satisfying 180mm ≤ L3 ≤ 220mm.

16. The bubble water device according to any one of claims 1 to 12, characterized in that, The inner diameter of the suction section is D4, satisfying 1mm ≤ D4 ≤ 4mm; and / or, The length of the suction section is L4, satisfying 13mm ≤ L4 ≤ 20mm.

17. The sparkling water device according to any one of claims 1 to 12, characterized in that, The contraction section is tapered from one end of the inlet section towards the direction away from the inlet section, and the length of the contraction section is L5, satisfying 8mm ≤ L5 ≤ 12mm, and / or, The expansion section is tapered from one end of the throat section towards one end of the outlet section, and the length of the expansion section is L6, satisfying 13mm ≤ L6 ≤ 20mm.

18. The bubble water device according to claim 17, wherein, The inner wall surface of the contraction section and the axis of the contraction section have an included angle A, satisfying 12° ≤ A ≤ 15°, and / or, The inner wall surface of the expansion section and the axis of the expansion section have an included angle B, satisfying 6° ≤ B ≤ 12°.

19. The sparkling water device according to any one of claims 1 to 12, characterized in that, The inlet section and the contraction section form a water inlet channel, the suction section forms an air inlet channel, the throat section, the expansion section and the outlet section form a mixing channel, the water inlet channel is communicated with the mixing channel, the air inlet channel is communicated with the mixing channel through the air cavity, and the mixing channel is used for mixing gas and liquid.

20. The sparkling water device according to any one of claims 1 to 12, characterized in that, The bubble water device further includes a filtering module, the filtering module is arranged upstream of the water storage tank, the water inlet end of the filtering module is communicated with an external water source, and the water outlet end of the filtering module is communicated with the water inlet end of the water storage tank.

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