A water-vapor mixing device and a water purifier

Abstract

The present invention relates to the field of water purification technology, and discloses a water-gas mixing device, which includes: a main housing provided with a main cavity, a water inlet passage and a water outlet passage; at least two sets of flow diversion cavities are formed inside the main cavity along a preset direction, namely a first flow diversion cavity and a second flow diversion cavity; the water inlet passage is connected to the first flow diversion cavity; the second flow diversion cavity is connected to the water outlet passage; the first flow diversion cavity is provided with a plurality of diversion ports, and the plurality of diversion ports are connected to the main cavity; the second flow diversion cavity is provided with a plurality of confluence ports, and the plurality of confluence ports are connected to the main cavity. The present invention realizes the multi-stage flow and mixing of the water-gas mixture, increases the contact area and time between water and gas, enhances the mixing effect, helps to form more uniform and finer micro-nano bubbles, and also reduces the maximum diversion resistance during the mixing process by optimizing the flow channel, improves the water flow velocity, while ensuring the mixing effect, does not excessively limit the flow rate of the micro-nano bubble water, and helps the popularization and application of the micro-bubble water purifier.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and particularly to a water-gas mixing device and a water purifier. Background Art

[0002] The functions of traditional water purifiers are relatively single, mainly focusing on removing harmful substances such as impurities, residual chlorine, and heavy metals in water. They are generally used for washing fruits, vegetables or directly as drinking water. To improve the water purification and washing effect of water purifiers, enhance the taste of water and promote human health, the industry has started to introduce bubble generation technology, and water purifier products that can provide micro-nano bubble water, namely micro-bubble water purifiers, have gradually emerged on the market.

[0003] When the external water source water pressure of existing micro-bubble water purifiers is relatively low, electric boosting technology is usually adopted to prepare micro-nano bubble water, that is, a booster pump is used to mix and boost the water body and gas, and the water-gas mixture after mixing and boosting flows through a gas mixing tank and a bubble releasing device in sequence to form micro-bubble water. Among them, the gas mixing tank is used to fully mix the water-vapor mixture conveyed by the booster pump, so that the gas is more evenly dispersed in the water to form micro-nano bubbles. However, the gas mixing tank of existing electrically boosted micro-bubble water purifiers has a simple structure, and the water flow is too fast during operation, resulting in a short water-gas contact time and a small water-gas contact area, leading to a low gas dissolution efficiency, and it is increasingly difficult to meet the current customer needs.

[0004] In response to this, to improve the gas dissolution efficiency of the gas mixing tank, different methods have been adopted in the industry. For example, an existing patent discloses a gas mixing tank, which realizes secondary gas dissolution by adding a Venturi tube structure in the gas mixing tank and using the water flow velocity to form a pressure difference. Although it effectively promotes the mixing of water and gas and improves the gas dissolution efficiency of the gas mixing tank, it will also cause other technical problems: Since the Venturi tube structure needs to be provided with a contraction section, a throat section and a diffusion section, by adjusting the flow cross-sectional area in different flow channels, the throat section (that is, the flow channel with a smaller flow cross-section and a larger flow velocity) can generate negative pressure to re-inhale the gas in the gas mixing tank into the water body to achieve the purpose of secondary gas dissolution. However, due to the need to set the throat section, the minimum flow cross-sectional area of the flow channel in the gas mixing tank is restricted, resulting in a small water outlet flow rate of the gas mixing tank provided with the Venturi tube structure, which restricts the water outlet efficiency and application range of the micro-bubble water purifier to a certain extent. In addition, due to the complex structure of the Venturi tube, the production and maintenance costs are relatively high, which is not conducive to popularization; in addition to the gas mixing tank that strengthens the gas mixing effect by adding a Venturi tube structure, an existing patent also discloses a gas mixing tank with a porous medium inside, which enhances the gas mixing effect by allowing the water-gas mixture to flow through the porous medium. However, while enhancing the gas mixing effect, due to the complexity and irregularity of the pore shape of the porous medium, when the water-gas mixture flows in the porous medium, additional complex flow phenomena such as eddy currents and backflows will occur, thereby increasing the flow resistance and affecting the water outlet flow rate of the gas mixing tank. Summary of the Invention

[0005] The present invention aims to provide a water-gas mixing device and a water purifier to solve the above technical problems.

[0006] To achieve the above object, the following technical solutions are provided:

[0007] In a first aspect, the present invention provides a water-gas mixing device applicable to the gas-liquid mixing of a water purifier, including: a main housing, the main housing is provided with a main cavity, a water inlet passage and a water outlet passage; at least two flow turning cavities are formed inside the main cavity along a preset direction, namely a first flow turning cavity and a second flow turning cavity; the water inlet passage is connected to the first flow turning cavity for centrally inputting a water-gas mixture into the first flow turning cavity; the second flow turning cavity is connected to the water outlet passage for centrally outputting the water-gas mixture to the water outlet passage; the first flow turning cavity is provided with a plurality of diversion ports, and the plurality of diversion ports are connected to the main cavity for dispersing and turning the water-gas mixture in the first flow turning cavity to the main cavity; the second flow turning cavity is provided with a plurality of confluence ports, and the plurality of confluence ports are connected to the main cavity for aggregating and turning the water-gas mixture in the main cavity to the second flow turning cavity.

[0008] As an optional solution of the water-gas mixing device provided by the present invention, the main housing includes: a mixing pipe, which forms a main cavity, a sealing port connected to the main cavity and a water outlet passage; a positioning pipe, which is detachably and sealingly connected to the sealing port and forms a water inlet passage; a fixing pipe, which is connected inside the main cavity and forms a second flow turning cavity; a movable cylinder, which is positioned inside the main cavity and is detachably connected to the fixing pipe and forms a first flow turning cavity.

[0009] As an optional solution of the water-gas mixing device provided by the present invention, one end of the movable cylinder is provided with a plugging portion adapted to be clamped to the fixing pipe, and the other end is provided with an opening communicating with the first flow turning cavity. One end of the positioning pipe is provided with a water injection pipe communicating with the water inlet passage. The water injection pipe forms a water injection port. The water injection port passes through the opening and extends into the first flow turning cavity. A plurality of water blocking plates are formed at the root of the water injection pipe. The water blocking plates abut against the opening to form a plurality of diversion ports.

[0010] As an optional solution of the water-gas mixing device provided by the present invention, the water injection port has a contact end face that can abut against the inner wall of the first flow turning cavity. The contact end face is axially recessed to form a diversion groove. The diversion groove communicates with the water injection port and radially penetrates the water injection pipe. The fluid output from the water injection port is guided by the diversion groove and is diverted into the first flow turning cavity.

[0011] As an optional solution of the water-gas mixing device provided by the present invention, a diversion surface is provided in the first flow turning cavity and is aligned with the water injection port. The diversion surface is connected to the inner wall of the first flow turning cavity for guiding and buffering the fluid discharged from the water injection port.

[0012] As an alternative to the water-gas mixing device provided by the present invention, a flow guiding block for guiding the flow direction of the fluid is provided on the inner wall of the first flow turning chamber. One end of the flow guiding block points towards the water injection port in alignment, and the side surface of the flow guiding block gradually expands from the end pointing towards the water injection port in alignment and continuously extends to the inner wall of the first flow turning chamber. The flow guiding surface is formed on the side surface of the flow guiding block.

[0013] As an alternative to the water-gas mixing device provided by the present invention, a plurality of flow disturbing plates are provided on the inner wall of one end of the second flow turning chamber communicating with the water outlet passage.

[0014] As an alternative to the water-gas mixing device provided by the present invention, the outer wall of the positioning tube is detachably and sealingly inserted into the sealing port.

[0015] As an alternative to the water-gas mixing device provided by the present invention, a set of annular grooves are axially provided on the outer wall of the positioning tube, and a sealing ring for elastically abutting against the inner wall of the sealing port is installed in the annular grooves.

[0016] As an alternative to the water-gas mixing device provided by the present invention, a connecting plate extends outward from the outer wall of the mixing tube, and the connecting plate is detachably connected to the positioning tube through a threaded fastener.

[0017] In a second aspect, the present invention also provides a water purifier including the water-gas mixing device as described above.

[0018] As an alternative to the water purifier provided by the present invention, it includes a water circuit board main body, a mixing port, and the water circuit board main body forms a mixing passage for the water-gas mixture to flow through. The mixing port is integrally connected to the water circuit board main body and communicates with the input end of the mixing passage. The positioning tube of the water-gas mixing device is integrally connected to the water circuit board main body, and the water inlet passage communicates with the output end of the mixing passage.

[0019] As an alternative to the water purifier provided by the present invention, a shunt water inlet valve is integrally connected to the water circuit board main body, and the input end of the shunt water inlet valve communicates with the output end of the mixing passage.

[0020] As an alternative to the water purifier provided by the present invention, an installation groove is formed at one end of the water inlet passage communicating with the mixing passage, and a check valve is provided in the installation groove. The conduction direction of the check valve is from the mixing passage towards the water inlet passage.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] Compared with the gas-liquid mixing structure of the existing electrically pressurized microbubble water purifier through porous media, by setting the first flow diversion chamber, the second flow diversion chamber, and the main chamber, the multi-stage flow and mixing of the water-gas mixture are realized, increasing the contact area and time between water and gas, enhancing the mixing effect, contributing to the formation of more uniform and finer micro-nano bubbles. Also, by optimizing the flow channel, the maximum diversion resistance during the mixing process is reduced, the water flow velocity is increased, while ensuring the mixing effect, it does not overly limit the flow rate of the micro-nano bubble water, which helps the popularization and application of the microbubble water purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings 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 content of the embodiments of the present invention and these drawings.

[0024] Figure 1 is a perspective schematic view of the water circuit board provided in this embodiment;

[0025] Figure 2 is a cross-sectional schematic view of the water circuit board provided in this embodiment;

[0026] Figure 3 is a structural schematic view of the positioning tube of the water circuit board provided in this embodiment;

[0027] Figure 4 is a cross-sectional view of the gas-liquid mixing device provided in this embodiment;

[0028] Figure 5 is a cross-sectional view of the movable cylinder of the water circuit board provided in this embodiment;

[0029] Figure 6 is a cross-sectional schematic view of the gas mixing pipe of the water circuit board provided in this embodiment.

[0030] In the figure:

[0031] 1. Main body of the waterway board; 11. Waterway layer; 12. Interface; 2. Mixing port; 3. Mixing passage; 4. Positioning tube; 41. Water inlet passage; 411. Water inlet port; 412. Water outlet port; 42. Annular groove; 43. Sealing ring; 44. Installation groove; 45. Check valve; 46. Water injection pipe; 461. Water injection port; 462. Water isolation plate; 463. Diversion groove; 5. Gas mixing pipe; 51. Water outlet passage; 52. Sealed port; 53. Connection plate; 54. Main cavity; 55. Fixed tube; 551. Second flow diversion cavity; 552. Confluence port; 553. Positioning hole; 554. Turbulence plate; 56. Movable cylinder; 561. First flow diversion cavity; 563. Insertion part; 564. Opening; 565. Diversion surface; 566. Fluid guide; 6. Flow splitting valve. Detailed implementation mode

[0032] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. 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 skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Embodiment 1

[0036] The functions of traditional water purifiers are relatively single, mainly focusing on removing harmful substances such as impurities, residual chlorine, and heavy metals in water. They are generally used for washing fruits, vegetables or directly as drinking water. To improve the water purification and washing effect of water purifiers, enhance the taste of water and promote human health, the industry has started to introduce bubble generation technology, and water purifier products that can provide microbubble water, namely microbubble water purifiers, have gradually emerged on the market.

[0037] To form microbubble water, existing microbubble water purifiers usually install the bubble generation component in series between the water outlet end of the booster pump and the water inlet end of the water outlet faucet. The booster pump delivers the water-gas mixture to the bubble generation component. The water-gas mixture flows through the bubble generation component and is released and burst by the bubble generation component to form microbubble water, which is finally discharged for use through the water outlet faucet. However, the bubble generation components of existing microbubble water purifiers are usually independently arranged and connected to other components through pipes. Due to the limited internal space of the water purifier, the bubble generation components are usually close to the booster pump. When taking water, since the bubble generation components are independently arranged and have a small volume, the bubble generation components will vibrate and shake under the action of water pressure instantaneously when water passes through them, and it is easy to collide with the adjacent booster pump and cause damage, which affects the operation of the water purifier and is also easy to generate abnormal noises, reducing the use experience.

[0038] In response to this, the present application provides a water circuit board, which is an integrated structure for water flow channels and component connections inside the water purifier. Through modular design, it can optimize the overall structure and performance of the water purifier. Specifically, referring to Figures 1 to 6 , the water circuit board includes: a water circuit board main body 1, which is formed by laminating and connecting water layers 11 made of food-grade polymer materials (such as PP polypropylene, PE polyethylene). A plurality of interfaces 12 are provided thereon, such as a raw water inlet, a filtered water outlet, an RO pure water outlet, and an RO concentrated water outlet, as well as several filter element interfaces 12 for connecting various components of the water purifier (such as filter elements, control valves, water pumps).

[0039] In this embodiment, the water circuit board further includes a mixing port 2 and a bubble generation component. The mixing port 2 and the bubble generation component are integrally connected to the water circuit board main body 1 respectively. A mixing passage 3 is formed inside the water circuit board main body 1. The input end of the mixing passage 3 is communicated with the mixing port 2, and the bubble generation component is connected to the output end of the mixing passage 3. When the above water circuit board is applied to a water purifier, the mixing port 2 is connected to the booster pump of the water purifier, and the bubble generation component is connected to the water outlet faucet of the water purifier. The booster pump delivers the water-gas mixture into the mixing passage 3 of the water circuit board main body 1 through the mixing port 2, and transports it to the bubble generation component through the mixing passage 3. The bubble generation component promotes the mixing of water and gas and releases and bursts to form microbubble water, which is discharged for use through the water outlet faucet.

[0040] Through the above technical scheme, an integrated design is adopted, a mixing passage 3 is set on the water circuit plate body 1, and the bubble generating component that was originally independently set is integrated into the water circuit plate body 1. When the above water circuit plate is applied to a water purifier, compared with the existing micro-bubble water purifier in which the bubble generating component is independently set, the positioning of the bubble generating component can be enhanced, and the bubble generating component can be prevented from being violently shaken and swung by the water pressure at the moment of water passing through, and the possibility of collision between the bubble generating component and other water purifier components (especially the booster pump) is reduced, the compactness of the structure is enhanced, and it helps to simplify the assembly process of the water purifier, reduce the number of external water pipes in the inner cavity of the water purifier, make the internal structure of the water purifier more concise, and facilitate subsequent maintenance and cleaning. In addition, unlike the traditional form of "the water-gas mixture is transported from the booster pump to the bubble generating component through a hose", in this embodiment, the mixing passage 3 for transporting the water-gas mixture is integrally formed in the waterway plate body 1, which is a hard fixed structure. During the transportation process, the mixing passage 3 will not be displaced under the impact of the water-gas mixture and will buffer the water-gas mixture. Its internal surface will fully collide with the water-gas mixture and stir the water-gas mixture, thereby promoting the dissolution of water vapor.

[0041] The bubble generating assembly includes a water-gas mixing device and a bubble releaser. The water-gas mixing device is equivalent to the gas mixing tank in the existing water purifier. The water-gas mixing device includes a main shell, and the main shell adopts a split structure, that is, the main shell includes a positioning tube 4 and a gas mixing tube 5, wherein the positioning tube 4 is integrally formed on the waterway plate main body 1, and the positioning tube 4 forms a water inlet passage 41. One end of the water inlet passage 41 extends toward the inside of the waterway plate main body 1 to form a water inlet port 411 connected to the mixing passage 3, and the other end thereof forms a water outlet port 412 outside the waterway plate main body 1. The gas mixing tube 5 is detachably connected to the positioning tube 4 and forms a water outlet passage 51. The input end of the water outlet passage 51 is connected to the water outlet port 412 of the positioning tube 4, and the bubble releaser is connected in series to the output end of the gas mixing tube 5. During operation, the positioning tube 4 is connected to the mixing passage 3, and the water-gas mixture in the mixing passage 3 is transported to the mixing tube 5. The mixing tube 5 is responsible for providing a cavity for the water-gas mixture to be fully mixed and dissolved again, that is, further enhancing the mutual dissolution of water and gas and increasing the amount of gas dissolved in the water body. The bubble releaser explodes and releases the gas dissolved in the water body through the internal filter screen, so that it forms bubbles that meet the specifications and mixes in the water body to form micro-bubble water. Through the above technical solution, on the basis of the above-mentioned integrated design, the water-gas mixing device adopts a modular design, the positioning tube 4 is directly integrated with the waterway plate body 1, and the mixing tube 5 is tightly connected to the positioning tube 4 in a detachable manner through threads and buckles, so that the user can easily clean, repair and replace it, which helps to extend the service life of the component.

[0042] The following is a detailed description of the detachable connection between the gas mixing tube 5 and the positioning tube 4:

[0043] One end of the mixing pipe 5 extends to form a sealed port 52 communicating with the water outlet passage 51. The sealed port 52 is for the detachable insertion of the water outlet port 412. The mixing pipe 5 is connected to the water outlet port 412 of the positioning pipe 4 in a plug-in manner, which can improve the integral connection degree between the mixing pipe 5 and the positioning pipe 4, making the disassembly and installation relatively fast.

[0044] To provide connection strength and connection tightness, in this embodiment, at least one set of annular grooves 42 is axially provided on the outer wall of the water outlet port 412, and a sealing ring 43 for elastically abutting against the inner wall of the sealed port 52 is installed in the annular grooves 42. During the installation process, when the water outlet port 412 of the positioning pipe 4 is inserted into the sealed port 52 of the mixing pipe 5, the sealing ring 43 will be radially squeezed, and then reversely abut against the inner wall of the sealed port 52, enhancing the friction force between the sealed port 52 and the water outlet port 412, thereby enhancing the connection stability. The sealing ring 43 is usually made of elastic materials such as rubber and silica gel, has good sealing performance, and can form an effective sealing barrier after being squeezed to prevent fluid leakage at the connection. The setting of the annular grooves 42 can ensure that the sealing ring 43 will not shift or fall off during installation, thus maintaining a long-term sealing effect.

[0045] To further enhance the connection strength between the positioning pipe 4 and the mixing pipe 5 and prevent the mixing pipe 5 from being displaced and separated from the positioning pipe 4 due to fluid impact, in this embodiment, a connecting plate 53 extends outward from the outer wall of the sealed port 52, and the connecting plate 53 is detachably connected to the main body 1 of the water circuit board by a threaded fastener. Since the positioning pipe 4 is integrally connected to the main body 1 of the water circuit board, the connecting plate 53 being detachably connected to the main body 1 of the water circuit board by a threaded fastener is equivalent to being detachably connected to the positioning pipe 4.

[0046] In addition, in this embodiment, an implementation structure of the water circuit board applied to a water purifier with a multi-waterway and multi-tap design is also provided, that is, a flow dividing valve 6 is connected to the main body 1 of the water circuit board. The input end of the flow dividing valve 6 communicates with the output end of the mixing passage 3. During operation, the flow dividing valve 6 communicates with the tap for discharging pure water, and the gas-water mixing device communicates with the micro-bubble tap for discharging micro-bubble water.

[0047] Further, an installation groove 44 is formed at one end where the water inlet port 411 of the positioning pipe 4 communicates with the mixing passage 3. A check valve 45 is arranged in the installation groove 44, and the conduction direction of the check valve is from the mixing passage 3 towards the water inlet port 411. Since the mixing passage 3 for connecting the external water circuit and the water-gas mixing device is integrally formed on the water circuit board main body 1, which is a rigid fixed structure and cannot buffer the water-gas mixture through shaking displacement, the setting of the check valve 45 can not only prevent "fluid backflow from reducing the pressure in the mixing pipe 5 and reducing the air mixing effect", but also play a buffering role, reducing the impact and vibration generated by the water-gas mixture on the water inlet port 411 of the positioning pipe 4. In addition, by setting the check valve 45, when the water circuit board is applied to a water purifier, when the water purifier produces pure water, the check valve 45 can be shut off under the air pressure of the water-gas mixing device, preventing the gas in the water-gas mixing device from flowing back, ensuring that no micro-bubble water is produced during the production of pure water, and avoiding affecting the taste of the pure water.

[0048] Considering that in the case of low external water source water pressure in existing micro-bubble water purifiers, an electrically pressurized technology is usually adopted to prepare micro-nano bubble water, that is, a booster pump is used to mix and pressurize the water body and gas, and the water-gas mixture after mixing and pressurization flows through a gas mixing tank (i.e., the water-gas mixing device in this embodiment) and a bubble releasing device in sequence to form micro-bubble water. Among them, the gas mixing tank is used to fully mix the water-gas mixture conveyed by the booster pump, so that the gas is more evenly dispersed in the water to form micro-nano bubbles. However, the gas mixing tank of the existing electrically pressurized micro-bubble water purifier has a simple structure, and the water flow is too fast during operation, resulting in a short water-gas contact time and a small water-gas contact area, leading to a low gas dissolution efficiency, and it is increasingly difficult to meet the current customer requirements.

[0049] In response to this, in order to improve the gas dissolution efficiency of the gas mixing tank, different methods have been adopted in the industry and existing patents. For example, by adding a Venturi tube structure inside the gas mixing tank and using the water flow velocity to form a pressure difference to achieve secondary gas dissolution. Although it effectively promotes the mixing of water and gas and improves the gas dissolution efficiency of the gas mixing tank, it will also cause other technical problems at the same time: Since the Venturi tube structure needs to be provided with a contraction section, a throat section and a diffusion section, by adjusting the cross-sectional area of the flow channels in different parts, a negative pressure can be generated in the throat section (that is, the flow channel with a smaller cross-sectional area and a larger flow velocity), so as to re-inhale the gas in the gas mixing tank into the influent water to achieve the purpose of secondary gas dissolution. However, due to the need to set up the throat section, it will greatly limit the minimum cross-sectional area of the flow channels in the gas mixing tank, affecting the effluent flow rate of the gas mixing tank, and to a certain extent restricting the effluent efficiency and application range of the microbubble water purifier. In addition, due to the complex structure of the Venturi tube, the production and maintenance costs are relatively high, which is not conducive to popularization. In addition to the gas mixing tank that strengthens the gas mixing effect by adding a Venturi tube structure, existing patents also disclose a gas mixing tank with a porous medium inside, which enhances the gas mixing effect by allowing the water-gas mixture to flow through the porous medium. However, while enhancing the gas mixing effect, due to the complexity and irregularity of the pore shape of the porous medium, when the water-gas mixture flows through the porous medium, additional complex flow phenomena such as vortices and backflows will be generated, thereby increasing the flow resistance and affecting the effluent flow rate of the gas mixing tank.

[0050] In response to this, to solve the above problems, the present application optimizes and improves the internal structure of the water-gas mixing device: A main cavity 54 is provided inside the water-gas mixing device. Along the water flow direction inside the main cavity 54 (that is, the influent passage 41 towards the effluent passage 51), at least two sets of flow diversion cavities are provided, namely the first flow diversion cavity 561 connected to the influent passage 41 and the second flow diversion cavity 551 connected to the effluent passage 51. A number of diversion ports communicating with the main cavity 54 are provided on the side wall of the first flow diversion cavity 561, and a number of confluence ports 552 communicating with the main cavity 54 are provided on the side wall of the second flow diversion cavity 551. During operation, first, the influent passage 41 is connected to the mixing passage 3, and the water-gas mixture first enters the first flow diversion cavity 561 through the influent passage 41 in a concentrated manner. After impacting the first flow diversion cavity 561 and performing preliminary mixing therein, the preliminarily mixed water-gas mixture then enters the main cavity 54 evenly through the diversion ports, further promoting the dissolution and dispersion of gas in water. Subsequently, the water-gas mixture fully mixed in the main cavity 54 is re-converged through the confluence ports 552 and introduced into the second flow diversion cavity 551, and after the third rotation and mixing, it is finally discharged outward in a concentrated manner through the effluent passage 51. Through the above process of "dispersion and flow diversion → re-convergence", the frequency of cross-expansion of the water-gas mixture can be greatly increased, the gas dissolution amount in the liquid can be significantly improved, and the microbubble water foam after subsequent foaming is rich in foam.

[0051] Compared with the existing air-liquid mixing structure in the electric pressure-boosted microbubble water purifier that promotes air-liquid mixing by means of a Venturi tube built into the air-liquid mixing tank, the present application realizes multi-stage flow and mixing of the air-water mixture by arranging a main cavity 54, a first flow diversion cavity 561 and a second flow diversion cavity 551 in the air-water mixing device. This multi-stage flow and mixing design not only increases the contact area and time between water and gas, but also enhances the mixing effect through multiple flows, which helps to form more uniform and finer micro-nano bubbles. While ensuring the mixing effect, it will not affect the flow area of the flow channel and overly restrict the water outlet flow rate of the micro-nano bubble water, resulting in a higher water outlet efficiency, which is conducive to the popularization and application of the microbubble water purifier. In addition, this solution that optimizes the flow channel to enhance the air-liquid mixing effect does not encounter a large diversion resistance during the flow of the air-water mixture compared with the technical solution of arranging a porous medium inside the air-liquid mixing tank to strengthen the air-liquid mixing effect, and the water outlet smoothness is better.

[0052] Specifically, the main cavity 54 is formed in the air mixing pipe 5 of the air-water mixing device. The two ends of the air mixing pipe 5 respectively form a water outlet passage 51 and the above-mentioned sealing port 52. The sealing port 52 communicates with the main cavity 54. The positioning pipe 4 is inserted into the sealing port 52 to seal the main cavity 54. A fixed pipe 55 and a movable cylinder 56 are positioned in the main cavity 54. The fixed pipe 55 is integrally connected to the inner wall of the main cavity 54 and forms the above-mentioned second flow diversion cavity 551. The movable cylinder 56 is detachably connected to the fixed pipe 55 and forms the above-mentioned first flow diversion cavity 561. Through the above technical solution, the fixed pipe 55 is integrally connected to the main cavity 54, and the movable pipe is detachably connected to the fixed pipe 55, which is convenient for subsequent maintenance and cleaning, and can effectively reduce the actual production difficulty and production cost of the above-mentioned "multi-stage flow and mixing mechanism design based on the main cavity 54, the first flow diversion cavity 561, and the second flow diversion cavity 551". During the actual production process, the air mixing pipe 5, the main cavity 54 and the fixed pipe 55 can be integrally formed by injection molding.

[0053] The specific implementation structure of the detachable connection between the movable cylinder 56 and the fixed pipe 55 is as follows: One end of the fixed pipe 55 close to the sealing port 52 is provided with a positioning hole 553. One end of the movable cylinder 56 is provided with a plugging portion 563 adapted to be snap-fitted into the positioning hole 553, and the other end thereof is provided with an opening 564 communicating with the first flow diversion cavity 561. One end of the positioning pipe 4 is provided with a water injection pipe 46 communicating with the water inlet passage 41. The end of the water injection pipe 46 far from the positioning pipe 4 forms a water injection port 461 for delivering the air-water mixture into the first flow diversion cavity 561. The water injection port 461 passes through the opening 564 and extends into the first flow diversion cavity 561. Near the end of the water injection pipe 46 close to the positioning pipe 4, that is, at the root of the water injection pipe 46, a plurality of water blocking plates 462 are formed. These water blocking plates 462 abut against the opening 564 and thus divide the opening 564 to form the above-mentioned plurality of diversion ports.

[0054] During installation, the plug-in part 563 can be first inserted into the positioning hole 553 for preliminary positioning. Subsequently, the positioning pipe 4 is inserted into the sealing port 52, and the water-blocking plate 462 abuts against the opening 564 of the movable cylinder 56 to perform two-way abutting positioning on the movable cylinder 56. The movable cylinder 56 is tightly connected to the fixed pipe 55. The installation process is simple and convenient, easy to operate, and has a low production cost. During maintenance, only by separating the positioning pipe 4 from the sealing port 52 can the movable cylinder 56 be disengaged from the fixed pipe 55. In addition, the water injection port 461 of the water injection pipe 46 extends into the first flow-turning cavity 561, and a water-blocking plate 462 and an opening 564 are arranged at its root to cooperate to form a diversion port. After the water-gas mixture enters the first flow-turning cavity 561 through the water injection port 461 of the water injection pipe 46, it needs to change direction and turn back to flow towards the diversion port, and enter the main cavity 54 through the diversion port. In this way, the flow path length can be extended as much as possible under the condition of limited cavity volume, and the residence time of the water-gas mixture in the water-gas mixing device can be extended, thereby enhancing the gas mixing effect. Moreover, when the water-gas mixture is discharged from the water injection pipe 46 and turns back to flow towards the diversion port, additional turbulence and shear force will be generated, which helps the gas to be more evenly dispersed in the water to form finer micro-nano bubbles.

[0055] Based on the above structure, theoretically speaking, the farther the water injection port 461 of the water injection pipe 46, that is, the end of the water injection pipe 46 away from the positioning pipe 4, extends into the first flow-turning cavity 561, the farther the distance between the water injection port 461 of the water injection pipe 46 and the diversion port will be. Similarly, the longer the flow path length of the reverse turning and diversion path of "water injection pipe 46 → first flow-turning cavity 561 → diversion port" can be extended, and the residence time of the water-gas mixture in the first flow-turning cavity 561 can be maximally extended to enhance the gas mixing effect.

[0056] However, when the water injection port 461 of the water injection pipe 46 extends relatively deep into the first flow-turning cavity 561, another problem will be caused: when the water-gas mixture initially enters the water-gas mixing device, it is concentrated and injected into the first flow-turning cavity 561 through the water injection pipe 46 in a form of concentrated flow. The initial water pressure and flow rate of the water-gas mixture are relatively high. When the water injection pipe 46 extends relatively deep into the first flow-turning cavity 561, the distance between the inner wall of the first flow-turning cavity 561 opposite to the water injection port 461 and the water injection port 461 will be relatively close, resulting in a lack of necessary turning and buffering space for the water-gas mixture ejected from the water injection port 461. This will cause the bottom of the movable cylinder 56 in the attached drawing, that is, the inner wall of the first flow-turning cavity 561 opposite to the water injection port 461, to directly collide with the water-gas mixture ejected from the water injection port 461 to form turbulence. After the water-gas mixture impacts the inner wall of the first flow-turning cavity 561, it reversely turns to the diversion port in an irregularly divided flow form, resulting in low efficiency of the water-gas mixture reversely turning to the diversion port, which not only affects the subsequent water injection and the smoothness of the water output of the water-gas mixing device, but may even cause water flow blockage or backflow.

[0057] To solve the "series of problems caused by the water injection port 461 extending deep into the first flow diversion cavity 561", in this embodiment, the structure of the water injection pipe 46 and the internal structure of the first flow diversion cavity 561 are optimized and improved.

[0058] For example, in this embodiment, the water injection port 461 extends into the first flow diversion cavity 561 and has a contact end face that abuts against the inner wall of the first flow diversion cavity 561. The contact end face is axially recessed towards the positioning pipe 4 to form a diversion groove 463. The diversion groove 463 communicates with the water injection port 461 and radially penetrates the water injection pipe 46. Through the above technical solution, during operation, after the water-vapor mixture ejected from the water injection port 461 impacts the inner wall of the first flow diversion cavity 561, the flow direction of the water-vapor mixture is restricted by the diversion channel formed by the inner wall of the first flow diversion cavity 561 and the inner wall of the diversion groove 463, so that the water-vapor mixture is reversely diverted to the diversion port in the form of concentrated diversion. This enables the water-vapor mixture to maintain a certain speed and pressure during the reverse diversion process, reduces kinetic energy loss, improves the reverse diversion efficiency, maintains the uniformity of the water-vapor mixture, makes the mixing of the water-vapor mixture in the first flow diversion cavity 561 more sufficient and uniform, helps to form high-quality micro-nano bubble water. At the same time, due to the design of the diversion groove 463, the water injection port 461 can extend as deep as possible into the first flow diversion cavity 561, maximizing the distance between the water injection port 461 and the diversion port, and increasing the flow channel length of the reverse folding diversion path of "water injection pipe 46 → first flow diversion cavity 561 → diversion port".

[0059] In the drawings of this embodiment, the cross-section of the diversion groove 463 is rectangular and radially and bidirectionally penetrates the water injection pipe 46, so that the diversion channel formed by the first flow diversion cavity 561 and the diversion groove 463 has two outlets. The water-vapor mixture ejected from the water injection port 461 is concentrated and divided into two streams through this diversion channel and diverted to the diversion port. Of course, in practical applications, the shape of the diversion groove 463 can be specifically set according to product requirements, and the number of outlets of the above diversion channel can be set to more than two.

[0060] In addition, a flow guiding surface 565 is provided in the first flow diversion cavity 561. The flow guiding surface 565 is aligned with the water injection port 461 and connects to the inner wall of the first flow diversion cavity 561, so as to guide and buffer the water-vapor mixture discharged from the water injection port 461. By providing the flow guiding surface 565, the flow guiding surface 565 is aligned with the water injection port 461 and serves as a transition area between the water-vapor mixture and the inner wall of the first flow diversion cavity 561. During operation, the flow guiding surface 565 can guide the water-vapor mixture ejected from the water injection port 461 to flow along a predetermined path, reduce the formation of turbulence and eddy currents, absorb and disperse the energy when the water-vapor mixture impacts, play a buffering role, reduce the impact force and impact frequency of the water-vapor mixture on the inner wall of the first flow diversion cavity 561, reduce wear and noise, thereby improving the reliability and service life of the water-vapor mixing device. In addition, the presence of the flow guiding surface 565 enables the water-vapor mixture to be more evenly distributed after entering the first flow diversion cavity 561, which helps the gas to dissolve more fully in the water.

[0061] Of course, the shape and formation method of the flow guiding surface 565 are diverse and can be a spherical surface, a plane or other shaped structures. This embodiment specifically provides an implementation structure of the flow guiding surface 565: a flow guiding block 566 for guiding the fluid flow direction is provided on the inner wall of the first flow diversion cavity 561. One end of the flow guiding block 566 is aligned and pointed at the water injection port 461, and the side surface of the flow guiding block 566 gradually expands from its end aligned and pointed at the water injection port 461 and continuously extends to the inner wall of the first flow diversion cavity 561, and the above-mentioned flow guiding surface 565 is formed along this side surface. Through the above technical solution, the side surface of the flow guiding block 566 gradually expands and extends from its end aligned and pointed at the water injection port 461, not only having the technical effects of the above-mentioned flow guiding surface 565, but also the flow guiding block 566 can form a conical-like mechanical structure with better impact resistance, and can utilize the diffusion principle in fluid mechanics, that is, when the high-velocity water-vapor mixture impacts the gradually expanding side surface of the flow guiding block 566, its flow velocity will gradually decrease, converting kinetic energy into pressure energy, thereby being able to reduce the formation of turbulence and eddy currents. In addition, at the same time, the gradually expanding flow guiding surface 565 can also form a certain angle with the flow direction of the water-vapor mixture, generating additional turbulence and shear force, further promoting the dispersion and dissolution of the gas in the water and forming finer micro-nano bubbles.

[0062] In addition to the above structure, to further enhance the water-vapor mixing effect, a plurality of flow disturbing plates 554 are formed by the inward extension of the inner wall at one end of the second flow diversion cavity 551 communicating with the water outlet passage 51. When the water-vapor mixture that has undergone preliminary and intermediate mixing enters the second flow diversion cavity 551 through the confluence port 552, they will encounter the inwardly extending flow disturbing plates 554. These flow disturbing plates 554 will radially insert into the flow path of the water-vapor mixture and collide with the fluid, causing the water-vapor mixture to generate eddy currents and turbulence, forming a complex flow field, enabling the gas to dissolve more evenly in the water and forming finer and more stable micro-nano bubbles in the water.

[0063] Embodiment 2

[0064] A water purification system includes a water inlet pipeline, a booster pump, an air pump, and a microbubble faucet. The output end of the water inlet pipeline is connected to the input end of the booster pump and the output end of the air pump simultaneously. It also includes the water circuit board in Embodiment 1. The output end of the booster pump communicates with the mixing port 2, and the input end of the microbubble faucet is connected to the output end of the bubble generating assembly. Since the bubble generating assembly of this water purification system is integrally connected to the water circuit board, the bubble generating assembly obtains better support rigidity. The bubble generating assembly will not shake or sway due to the water pressure impact at the moment of water connection, and can avoid collision with other components such as the booster pump. The overall stability is strong. In addition, since the water circuit board is internally provided with a mixing passage 3 for connecting the booster pump and the bubble generating assembly, it helps to simplify the assembly process of the water purifier, reduce the number of external water pipes of the water purification system, thereby enhancing the structural compactness and improving the utilization rate of the external installation space of the water purification system.

[0065] Embodiment 3

[0066] A water purifier includes the water purification system as in Embodiment 2.

[0067] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water-gas mixing device, suitable for gas-liquid mixing in a water purifier, characterized in that: include: A main housing, the main housing being provided with a main cavity (54), a water inlet passage (41) and a water outlet passage (51); At least two groups of transfer flow chambers are formed inside the main chamber (54) along a preset direction, namely a first transfer flow chamber (561) and a second transfer flow chamber (551); The water inlet passage (41) is connected to the first flow conversion chamber (561) for centrally inputting the water-gas mixture into the first flow conversion chamber (561); the second flow conversion chamber (551) is connected to the water outlet passage (51) for centrally outputting the water-gas mixture into the water outlet passage (51); The first transfer chamber (561) is provided with a plurality of diversion ports, the plurality of diversion ports being connected to the main chamber (54) and used for dispersing and diverting the water-gas mixture in the first transfer chamber (561) to the main chamber (54); The second flow conversion chamber (551) is provided with a plurality of confluence ports (552), and the plurality of confluence ports (552) are connected to the main chamber (54) and are used to aggregate and divert the water-gas mixture in the main chamber (54) to the second flow conversion chamber (551); The direction of the water flow in the main cavity (54) sequentially passes through the dispersed flow of the first flow conversion cavity (561), the mixing and expansion of the main cavity (54), and the aggregate flow of the second flow conversion cavity (551), thereby forming a multi-stage flow channel switching; the diversion ports and the confluence ports (552) are staggeredly distributed along the axial direction of the main cavity (54) to reduce the flow diversion resistance and increase the water flow speed.

2. The water-gas mixing device according to claim 1, characterized in that: The main housing comprises: an air mixing tube (5), which forms a main cavity (54), a sealing port (52) connected to the main cavity (54), and a water outlet passage (51); a positioning tube (4), which is detachably sealed and connected to the sealing port (52) and forms a water inlet passage (41); a fixed tube (55), which is connected to the main cavity (54) and forms a second transfer cavity (551); and a movable tube (56), which is positioned in the main cavity (54) and detachably connected to the fixed tube (55), and forms a first transfer cavity (561).

3. The water-gas mixing device according to claim 2, characterized in that: One end of the movable cylinder (56) is provided with a plug-in portion (563) adapted to fit the clamping fixing tube (55), and the other end thereof is provided with an opening (564) connected to the first flow transfer chamber (561). One end of the positioning tube (4) is provided with a water injection pipe (46) connected to the water inlet passage (41), and the water injection pipe (46) is formed with a water injection port (461), and the water injection port (461) passes through the opening (564) and extends into the first flow transfer chamber (561). The root of the water injection pipe (46) is formed with a plurality of water baffles (462), and the water baffles (462) abut against the opening (564) to form a plurality of diversion ports.

4. The water-gas mixing device according to claim 3, characterized in that: The water injection port (461) has a contact end face that can abut against the inner wall of the first transfer chamber (561); the contact end face is axially recessed to form a guide groove (463); the guide groove (463) is connected to the water injection port (461) and radially passes through the water injection pipe (46); the fluid output from the water injection port (461) is guided and diverted into the first transfer chamber (561) through the guide groove (463).

5. The water-gas mixing device according to claim 3, characterized in that: The first flow conversion cavity (561) has a guide surface (565) aligned with the water injection port (461), and the guide surface (565) is connected to the inner wall of the first flow conversion cavity (561) to guide and buffer the fluid discharged from the water injection port (461).

6. The water-gas mixing device according to claim 5, characterized in that: The inner wall of the first flow-transfer chamber (561) is provided with a guide block (566) for guiding the flow direction of the fluid, one end of the guide block (566) is aligned and points to the water injection port (461), and the side surface of the guide block (566) gradually expands from the end of the guide block (566) that points to the water injection port (461) and continuously extends to the inner wall of the first flow-transfer chamber (561), and the guide surface (565) is formed on the side surface of the guide block (566).

7. The water-gas mixing device according to claim 2, characterized in that: An inner wall of one end of the second flow-transfer chamber (551) connected to the water outlet passage (51) is provided with a flow-interference plate (554).

8. The water-gas mixing device according to claim 2, characterized in that: The outer wall of the positioning tube (4) is detachably sealed and plugged into the sealing port (52).

9. The water-gas mixing device according to claim 7, characterized in that: A group of annular grooves (42) are axially arranged on the outer wall of the positioning tube (4), and a sealing ring (43) is installed in the annular groove (42) for elastically abutting against the inner wall of the sealing port (52).

10. The water-gas mixing device according to claim 7, characterized in that: The outer wall of the gas mixing tube (5) extends outward to form a connecting plate (53), and the connecting plate (53) is detachably connected to the positioning tube (4) via a threaded fastener.

11. A water purifier, characterized in that: It comprises a water-gas mixing device as described in any one of claims 2 to 10.

12. The water purifier according to claim 11, characterized in that: The invention comprises a waterway plate body (1) and a mixing port (2), wherein the waterway plate body (1) is formed with a mixing passage (3) for circulating a water-gas mixture, the mixing port (2) is integrally connected to the waterway plate body (1) and communicates with the input end of the mixing passage (3), the positioning pipe (4) of the water-gas mixing device is integrally connected to the waterway plate body (1), and the water inlet passage (41) communicates with the output end of the mixing passage (3).

13. The water purifier according to claim 12, characterized in that: A diverter valve (6) is integrally connected to the waterway plate body (1), and the input end of the diverter valve (6) is connected to the output end of the mixing passage (3).

14. The water purifier according to claim 12, characterized in that: An installation groove (44) is formed at one end of the water inlet passage (41) connected to the mixing passage (3), a check valve (45) is arranged in the installation groove (44), and the conducting direction of the check valve (45) is from the mixing passage (3) toward the water inlet passage (41).

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