Water treatment micro-nano bubble machine

Abstract

The utility model discloses a water treatment micro-nano bubble machine, which belongs to the technical field of sewage treatment and comprises an air inlet pipe and a water inlet pipe, the air inlet pipe is connected with an air supply source, and the water inlet pipe is connected with a water supply source; the air inlet pipe and the water inlet pipe converge and are connected into a flow control assembly, and the flow control assembly is provided with a flow control channel with a variable inner diameter in the flowing direction of the dissolved air liquid and used for controlling air flow fluctuation; the tail end of the flow control channel in the water flow direction is connected with a releaser, the releaser is provided with a plurality of dissolved air release ports, and the dissolved air release ports are used for shunting and discharging dissolved air liquid. According to the utility model, the size of the formed bubbles can be reduced, the residence time of the bubbles in water and the gas-liquid contact area are increased, and the dissolved gas release port of the releaser shunts the dissolved gas liquid to further reduce the volume of the bubbles, so that the dissolution of the bubbles in water is enhanced, and the gas-liquid mass transfer efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a water treatment micro-nano bubble machine. Background Art

[0002] In the process of river water purification, micro-nano bubble technology generates high-density, uniform and tiny bubbles, which are highly integrated with the target gas (such as oxygen) to form an efficient micro-nano bubble-water composite emulsification system. This system not only significantly improves the efficiency of dissolved oxygen, but also effectively promotes the full contact and reaction between pollutants and microorganisms or chemical treatment agents in water, thereby enhancing the water treatment effect.

[0003] In the prior art, a Chinese patent document with a publication number of CN209393040U discloses an intelligent micro-nano bubble machine, which sets the water volume required for bubble water through a touch screen, and then sets the volume of air according to the volume of water. By installing an air pressure sensor inside the air dissolving tank, the air pressure inside the air dissolving tank is monitored in real time, and the air pressure is balanced through a pressure relief valve and an exhaust pipe, thereby improving intelligence. The micro-nano bubble machine uses a motor to drive the mesh plate of the stirring mechanism to rotate, so that air is dissolved in water to generate bubbles, but the size of the bubbles generated in this way is relatively large, and the large-sized bubbles are prone to uneven distribution and insufficient residence time, resulting in low gas-liquid mass transfer efficiency. Utility Model Content

[0004] The utility model aims to provide a water treatment micro-nano bubble machine to solve the problem that the bubbles generated by the micro-nano bubble machine in the prior art are relatively large in size, and the large-sized bubbles are prone to uneven distribution and insufficient residence time, resulting in low gas-liquid mass transfer efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a water treatment micro-nano bubble machine, including an air inlet pipe and a water inlet pipe, the air inlet pipe is connected to an air supply source, and the water inlet pipe is connected to a water supply source; the air inlet pipe and the water inlet pipe are connected to a flow control component at the confluence, and the flow control component is provided with a flow control channel with a changing inner diameter along the flow direction of the dissolved gas liquid, so as to control the air flow fluctuation; the flow control channel is connected with a releaser at the end in the water flow direction, and the releaser is provided with a plurality of dissolved gas release ports, and the plurality of dissolved gas release ports divert and discharge the dissolved gas liquid.

[0006] Furthermore, the flow control channel includes an air intake section, a steady flow section, an increase speed introduction section, a preliminary self-excited pulse section, a preliminary self-excited pulse lead-out section, a buffer transition section, a jet section, a final self-excited pulse section and a pulse diversion section, which are connected in sequence along the flow direction of the dissolved gas and liquid; the inner diameter of the air intake section is less than or equal to the minimum inner diameter of the steady flow section, the inner diameter of the steady flow section is greater than the inner diameter of the increase speed introduction section, the inner diameter of the increase speed introduction section is smaller than the inner diameter of the preliminary self-excited pulse section, the inner diameter of the preliminary self-excited pulse section is greater than the inner diameter of the preliminary self-excited pulse lead-out section, the inner diameter of the preliminary self-excited pulse lead-out section is smaller than the inner diameter of the buffer transition section, the inner diameter of the buffer transition section is greater than the inner diameter of the jet section, the inner diameter of the jet section is smaller than the maximum inner diameter of the final self-excited pulse section, and the minimum inner diameter of the final self-excited pulse section is greater than the maximum inner diameter of the pulse diversion section.

[0007] Furthermore, the air intake section, speed increasing introduction section, preliminary self-excited pulse section, preliminary self-excited pulse extraction section, buffer transition section and jet section are all cylindrical inner cavities; the steady flow section is a shuttle-shaped inner cavity; and the ultimate self-excited pulse section is an inner cavity with a trapezoidal cross-section.

[0008] Furthermore, the releaser includes a releasing part and an adjusting part, and the adjusting part is connected to the releasing part through a connecting part; a plurality of dissolved gas release ports are provided and are all located outside the releasing part, and the dissolved gas release ports are connected to the inside of the releasing part.

[0009] Furthermore, the releaser is provided with a backwashing device, and the output end of the backwashing device is connected to the interior of the regulating part.

[0010] Furthermore, the regulating part is provided with a switch component, and the switch component opens or closes the input end of the connecting part.

[0011] Furthermore, the switch assembly includes a drive assembly and a piston, the output end of the drive assembly is connected to the piston, the circumferential surface of the piston is arranged in close contact with the inner wall of the side where the connecting part of the adjusting part is located, and the drive assembly drives the piston to leave or block the input end of the connecting part.

[0012] Furthermore, the release portion is provided with a dissolved gas liquid inlet, the dissolved gas liquid inlet is connected to the flow control channel through a liquid inlet pipe, and a filtering device is installed inside the liquid inlet pipe at a position close to the dissolved gas liquid inlet.

[0013] Furthermore, a drain pipe is connected to the position of the liquid inlet pipe relative to the filter device, the input end of the drain pipe is connected to the liquid inlet pipe, and an openable sealing cover is installed at the output end of the drain pipe.

[0014] Furthermore, it also includes a control unit and a flow meter, the flow meter is installed on the air inlet pipe and the water inlet pipe respectively, and the control unit is electrically connected to the flow meter.

[0015] Compared with the existing known technologies, the technical solution provided by the utility model has the following beneficial effects:

[0016] The utility model discloses a water treatment micro-nano bubble machine. Water and gas are merged through a water inlet pipe and an air inlet pipe to form a dissolved gas liquid. When the dissolved gas liquid passes through a flow control channel with a changing inner diameter, the flow velocity of the dissolved gas liquid in the flow control channel with a smaller inner diameter increases, and the flow velocity of the dissolved gas liquid slows down when passing through the flow control channel with a larger inner diameter. Such a change in flow velocity can increase the fluctuation of the airflow in the dissolved gas liquid. The dissolved gas liquid forms eddies and airflow deflections in the flow control channel through processes such as entrainment, wall attachment, collision, and feedback, which can reduce the size of the formed bubbles, increase the residence time of the bubbles in the water and the gas-liquid contact area, and the dissolved gas release port of the releaser diverts the dissolved gas liquid to further reduce the volume of the bubbles, thereby enhancing their dissolution in water and improving the gas-liquid mass transfer efficiency.

[0017] It will be apparent that elements or features described above in the context of a single embodiment may be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the release state structure of the releaser in the embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the backwash state structure of the releaser in the embodiment of the utility model.

[0022] Description of Reference Numerals

[0023] 100, air inlet pipe; 200, water inlet pipe; 300, manifold; 400, flow control component; 410, flow control channel; 411, air inlet section; 412, steady flow section; 413, speed increase introduction section; 414, initial self-excited pulse section; 415, initial self-excited pulse lead-out section; 416, buffer transition section; 417, jet section; 418, ultimate self-excited pulse section; 419, pulse diversion section; 500, releaser; 510, release part; 511, dissolved gas release port; 512, dissolved gas liquid inlet; 520, regulating part; 521, connecting part; 522, regulating part Section housing; 530, backwash device; 531, first valve; 540, switch assembly; 541, piston; 542, hand wheel; 543, screw; 544, threaded kit; 545, rotating shaft; 550, liquid inlet pipe; 551, filtering device; 552, drain pipe; 553, sealing cover; 554, second valve; 600, air supply source; 610, air source pipeline; 700, control unit; 710, touch screen; 720, control box; 730, flow meter; 800, water pump; 810, water filter box; 820, water source pipeline; 900, casing. DETAILED DESCRIPTION

[0024] The present invention will be described in detail with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0025] Reference Figure 1-Figure 3This embodiment provides a water treatment micro-nano bubble machine, including a housing 900, an air supply source 600 and a water supply source are installed inside the housing 900, an air inlet pipe 100 is connected to the air supply source 600, and a water inlet pipe 200 is connected to the water supply source. The air supply source 600 is an air pump, which is connected to the air of the external environment of the housing 900 through the air source pipe 610, and the air pump is operated to transport the external air into the air inlet pipe 100. Similarly, the water supply source includes a water pump 800 and a water source pipe 820, and the water pump 800 is connected to the outside of the housing 900 through the water source pipe 820, and the water to be treated is driven by the water pump 800 to enter the water inlet pipe 200 through the water source pipe 820. The water source pipeline 820 is also connected to a water filter box 810, which is connected to the front side of the water inlet end of the water pump 800. The water enters the water pump 800 after being filtered by the water filter box 810, so as to prevent the water pump 800 from sucking in debris and being damaged. The air inlet pipe 100 and the water inlet pipe 200 are connected to the flow control component 400 through the manifold 300. The flow control channel 410 with a variable inner diameter is provided in the flow control component 400 along the flow direction of the dissolved gas and liquid to control the fluctuation of the air flow. Water and gas flow in from the water inlet pipe 200 and the air inlet pipe 100 respectively and converge through the confluence pipe 300 to form a dissolved gas liquid. When the dissolved gas liquid passes through the flow control channel 410 with a changing inner diameter, the flow velocity of the dissolved gas liquid in the flow control channel 410 with a smaller inner diameter increases, and the flow velocity of the dissolved gas liquid slows down when passing through the flow control channel 410 with a larger inner diameter. This change in flow velocity can increase the fluctuation of the airflow in the dissolved gas liquid. The dissolved gas liquid forms eddies and airflow deflection in the flow control channel 410 through processes such as entrainment, wall attachment, collision, and feedback, which can reduce the size of the bubbles formed and increase the residence time of the bubbles in the water and the contact area between the gas and the liquid. The flow control channel 410 is connected to a releaser 500 at the end of the water flow direction, and a plurality of dissolved gas release ports 511 are arranged on the outside of the releaser 500. The dissolved gas release ports 511 divert and discharge the dissolved gas liquid. The dissolved gas release port 511 can further reduce the volume of bubbles by diverting the dissolved gas liquid, thereby enhancing the dissolution of bubbles in water and improving the gas-liquid mass transfer efficiency.

[0026] The change in the inner diameter of the flow control channel 410 is reflected in the fact that it includes a plurality of connecting sections with different inner diameters. Specifically, Figure 1As shown, the flow control channel 410 includes an air intake section 411, a steady flow section 412, an increase speed introduction section 413, a preliminary self-excited pulse section 414, a preliminary self-excited pulse lead-out section 415, a buffer transition section 416, a jet section 417, a final self-excited pulse section 418 and a pulse diversion section 419 in sequence along the flow direction of the dissolved gas and liquid. In this embodiment, the inner diameter of the air intake section 411 is less than or equal to the minimum inner diameter of the steady flow section 412, the air intake section 411 is a cylindrical inner cavity, and the steady flow section 412 is a shuttle-shaped inner cavity, that is, a structure that gradually increases from both ends to the middle, and the airflow enters a larger cavity to achieve steady flow control. The inner diameter of the steady flow section 412 is larger than the inner diameter of the increase speed introduction section 413, the inner diameter decreases, and the airflow speed increases. The inner diameter of the increase speed introduction section 413 is smaller than the inner diameter of the preliminary self-excited pulse section 414 and both are cylindrical cavities, and the airflow enters a cavity that suddenly becomes larger, forming a preliminary self-pulse. The inner diameter of the preliminary self-excited pulse section 414 is larger than the inner diameter of the preliminary self-excited pulse lead-out section 415, the inner diameter of the preliminary self-excited pulse lead-out section 415 is smaller than the inner diameter of the buffer transition section 416, the inner diameter of the buffer transition section 416 is larger than the inner diameter of the jet section 417, and the inner diameter of the jet section 417 is smaller than the maximum inner diameter of the ultimate self-excited pulse section 418. The minimum inner diameter of the ultimate self-excited pulse section 418 is larger than the maximum inner diameter of the pulse diversion section 419. The purpose of the larger cavity of the buffer transition section 416 is to transmit the pressure fluctuation at the outlet of the preliminary self-excited pulse lead-out section 415 to the jet section 417, forming the boundary condition of the pressure pulse, which is conducive to strengthening the turbulence of the cavity airflow of the ultimate self-excited pulse section 418. The turbulent deflected airflow flows out through the pulse diversion section 419 through the outlet. This process not only improves the impact force and cutting ability of the jet, but also realizes the fine control and efficient use of the airflow. It should be noted that the ultimate self-excited pulse section 418 and the pulse diversion section 419 are both inner cavities with a trapezoidal cross section. The jet section 417 includes two or more jet tubes to form two or more jets, and the ultimate self-excited pulse section 418 performs ultimate self-pulsation on the jet. In addition to the inner diameter changes and shapes of the various connecting sections in the above embodiments, other forms can also be used, and the inner diameter changes and shapes in the above embodiments are the most preferred.

[0027] The airflow forms eddies and airflow deflections through the flow control assembly 400, and the fluctuating airflow is diverted and then passed into the releaser 500 and then released through the releaser 500. In some embodiments, Figure 2 As shown, the releaser 500 includes a release portion 510 and a regulating portion 520, and the regulating portion 520 is connected to the release portion 510 through a connecting portion 521. Two or more dissolved gas release ports 511 are provided and are all located outside the release portion 510. In this embodiment, eight dissolved gas release ports 511 are provided, and the dissolved gas release ports 511 are connected to the inside of the release portion 510. The dissolved gas release ports 511 divert the dissolved gas liquid to further reduce the volume of the bubbles, thereby enhancing the dissolution of the bubbles in the water and improving the gas-liquid mass transfer efficiency.

[0028] Furthermore, when the dissolved gas liquid is input from the fluid control component 400 to the releaser 500, the dissolved gas liquid needs to be further filtered to prevent the releaser 500 from being blocked. Figure 2 As shown, the release part 510 is provided with a dissolved gas liquid inlet 512, and the dissolved gas liquid inlet 512 is connected to the flow control channel 410 through a liquid inlet pipe 550, and a second valve 554 is installed on the outside of the liquid inlet pipe 550 to control the on-off of the liquid inlet pipe 550. A filter device 551 is installed at a position near the dissolved gas liquid inlet 512 inside the liquid inlet pipe 550. The filter device 551 is a filter mesh structure with fine mesh holes. On the one hand, it can filter the dissolved gas liquid, and on the other hand, it can also further divide the bubbles in the dissolved gas liquid into bubbles of smaller sizes, thereby further improving the gas-liquid mass transfer efficiency.

[0029] It is understandable that the releaser 500 needs to be cleaned after long-term use. Therefore, the releaser 500 is provided with a backwashing device 530, and the output end of the backwashing device 530 is connected to the inside of the regulating part 520 and the release part 510. The backwashing device 530 mainly includes a backwashing pipe, and a first valve 531 is provided on the backwashing pipe to control the opening and closing of the backwashing pipe. The backwashing pipe is connected to an external high-pressure water source, and the high-pressure water can flush the inside of the releaser 500 when the first valve 531 is opened.

[0030] Specifically, Figure 3 As shown, the regulating part 520 is provided with a regulating housing 522, one end of the recoil pipe extends to the outside of the regulating housing 522, and the other end is located in the cavity inside the regulating housing 522. The regulating part 520 is provided with a switch assembly 540, and the switch assembly 540 opens or closes the input end of the connecting part 521. When the recoil pipe delivers high-pressure water to the inside of the regulating housing 522 for flushing, the switch assembly 540 closes the input end of the connecting part 521. It can be understood that the connecting part 521 as a whole presents a tubular structure with a tapered output end, and the tapered output end extends into the inside of the releasing part 510, and the input end of the connecting part 521 is communicated with the inner cavity of the regulating part 520.

[0031] The switch assembly 540 has various structural forms. In some embodiments, the switch assembly 540 includes a drive assembly and a piston 541. The output end of the drive assembly is connected to the piston 541. The circumference of the piston 541 is arranged close to the inner wall of the side where the connecting portion 521 of the adjusting portion 520 is located. The drive assembly drives the piston 541 to leave or block the input end of the connecting portion 521. Figure 2 and Figure 3As shown, the driving assembly specifically includes a hand wheel 542, and a screw rod 543 is connected to the center of the hand wheel 542. Rotating the hand wheel 542 can drive the screw rod 543 to rotate around its own axis. The screw rod 543 passes through the adjustment housing 522 and is connected to the piston 541. In order to realize that the screw rod 543 rotates and drives the piston 541 to move up and down, a threaded sleeve 544 is installed at the position of the adjustment housing 522 corresponding to the position where the screw rod 543 passes, and the screw rod 543 is threadedly connected to the threaded sleeve 544; the piston 541 is installed with a rotating shaft 545 at the connection position corresponding to the screw rod 543, and the end of the screw rod 543 is rotatably connected to the rotating shaft 545. When the hand wheel 542 is rotated, the screw rod 543 rotates and moves upward or downward, driving the piston 541 to move up and down, and the threaded sleeve 544 plays a role in locking the screw rod 543 to maintain the upper and lower positions of the screw rod 543.

[0032] It is understandable that when backwashing the releaser 500, the flushing wastewater needs to be discharged in time. Figure 3 As shown, a drain pipe 552 is connected to the position of the liquid inlet pipe 550 relative to the filter device 551, which is conducive to accommodating the filtered residue sediment. The input end of the drain pipe 552 is connected to the liquid inlet pipe 550, and the output end of the drain pipe 552 is installed with an openable sealing cover 553, which is threadedly connected to the drain pipe 552. When backwashing is performed, the sealing cover 553 is opened, and the backwashing water passes through the dissolved gas liquid inlet 512 and the filter screen from top to bottom to discharge the flushing waste water.

[0033] The operation of the nano bubble machine cannot be separated from automatic control, which needs to be led by the control unit 700. Figure 1 As shown, the control unit 700 is installed at the top of the housing 900, and the control unit 700 includes a touch screen 710 and a control box 720, and the control box 720 and the touch screen 710 are electrically connected. Flow meters 730 are installed on the air inlet pipe 100 and the water inlet pipe 200, respectively, and the control unit 700 is electrically connected to the flow meter 730. When in use, the required volume of water and the volume of air are set through the touch screen 710 on the surface of the control box 720, the water pump 800 and the air supply source 600 are started, and the water is pumped into the fluid control component 400 through the water pump 800, and the water delivery is monitored by the flow meter 730. The air supply source 600 compresses the air and delivers it to the inside of the fluid control component 400 through the air inlet pipe 100.

[0034] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] 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, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The protection scope of the present invention is limited only by the claims. Thanks to the teachings of the present invention, those skilled in the art will easily recognize that alternative structures to the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A water treatment micro-nano bubble machine, comprising an air inlet pipe (100) and a water inlet pipe (200), wherein the air inlet pipe (100) is connected to an air supply source (600), and the water inlet pipe (200) is connected to a water supply source; characterized in that: The air inlet pipe (100) and the water inlet pipe (200) are connected to a flow control component (400) at a convergence point. The flow control component (400) is provided with a flow control channel (410) with a variable inner diameter along the flow direction of the dissolved gas liquid, for controlling air flow fluctuations. The flow control channel (410) is connected to a releaser (500) at the end in the water flow direction. The releaser (500) is provided with a plurality of dissolved gas release ports (511). The plurality of dissolved gas release ports (511) discharge the dissolved gas liquid in a diverted manner.

2. A water treatment micro-nano bubble machine according to claim 1, characterized in that: The flow control channel (410) includes, in sequence along the flow direction of the dissolved gas and liquid, an air intake section (411), a steady flow section (412), an increase speed introduction section (413), a preliminary self-excited pulse section (414), a preliminary self-excited pulse lead-out section (415), a buffer transition section (416), a jet section (417), a final self-excited pulse section (418), and a pulse diversion section (419); the inner diameter of the air intake section (411) is less than or equal to the minimum inner diameter of the steady flow section (412); the inner diameter of the steady flow section (412) is greater than the inner diameter of the increase speed introduction section (413); the increase speed introduction section (414) is greater than the inner diameter of the increase speed introduction section (413); The inner diameter of the initial self-excited pulse section (413) is smaller than the inner diameter of the initial self-excited pulse section (414), the inner diameter of the initial self-excited pulse section (414) is larger than the inner diameter of the initial self-excited pulse lead-out section (415), the inner diameter of the initial self-excited pulse lead-out section (415) is smaller than the inner diameter of the buffer transition section (416), the inner diameter of the buffer transition section (416) is larger than the inner diameter of the jet section (417), the inner diameter of the jet section (417) is smaller than the maximum inner diameter of the ultimate self-excited pulse section (418), and the minimum inner diameter of the ultimate self-excited pulse section (418) is larger than the maximum inner diameter of the pulse diversion section (419).

3. A water treatment micro-nano bubble machine according to claim 2, characterized in that: The air intake section (411), the speed increasing introduction section (413), the preliminary self-excited pulse section (414), the preliminary self-excited pulse extraction section (415), the buffer transition section (416) and the jet section (417) are all cylindrical inner cavities; the steady flow section (412) is a shuttle-shaped inner cavity; and the ultimate self-excited pulse section (418) is an inner cavity with a trapezoidal cross section.

4. A water treatment micro-nano bubble machine according to claim 1, characterized in that: The releaser (500) comprises a release portion (510) and an adjustment portion (520), wherein the adjustment portion (520) is connected to the release portion (510) via a connection portion (521); a plurality of dissolved gas release ports (511) are provided and are all located outside the release portion (510), and the dissolved gas release ports (511) are connected to the inside of the release portion (510).

5. A water treatment micro-nano bubble machine according to claim 4, characterized in that: The releaser (500) is provided with a backwashing device (530), and an output end of the backwashing device (530) is in communication with the interior of the regulating part (520).

6. A water treatment micro-nano bubble machine according to claim 4, characterized in that: The regulating part (520) is provided with a switch component (540), and the switch component (540) opens or closes the input end of the connecting part (521).

7. A water treatment micro-nano bubble machine according to claim 6, characterized in that: The switch assembly (540) comprises a drive assembly and a piston (541); the output end of the drive assembly is connected to the piston (541); the circumferential surface of the piston (541) is arranged in close contact with the inner wall of the side where the connecting portion (521) of the regulating portion (520) is located; and the drive assembly drives the piston (541) to leave or block the input end of the connecting portion (521).

8. A water treatment micro-nano bubble machine according to claim 4, characterized in that: The release portion (510) is provided with a dissolved gas liquid inlet (512), and the dissolved gas liquid inlet (512) is connected to the flow control channel (410) via a liquid inlet pipe (550). A filtering device (551) is installed inside the liquid inlet pipe (550) at a position close to the dissolved gas liquid inlet (512).

9. A water treatment micro-nano bubble machine according to claim 8, characterized in that: A drain pipe (552) is connected to the position of the liquid inlet pipe (550) relative to the filter device (551); the input end of the drain pipe (552) is in communication with the liquid inlet pipe (550); and an openable sealing cover (553) is installed at the output end of the drain pipe (552).

10. The water treatment micro-nano bubble machine according to claim 1, characterized in that: It also includes a control unit (700) and a flow meter (730), wherein the flow meter (730) is respectively installed on the air inlet pipe (100) and the water inlet pipe (200), and the control unit (700) is electrically connected to the flow meter (730).

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