Micro-bubble self-cleaning water purifier

Abstract

The utility model discloses a micro-bubble self-cleaning water purifier which comprises a first water inlet pipeline, a second water inlet pipeline, a membrane filter element, a first water path switch, a first supercharging device, a second water path switch, an air suction device, a second supercharging device and a flow limiting device, the first waterway switch and the first supercharging device are arranged on the first water inlet pipeline, one end of the second water inlet pipeline is connected to the first water inlet pipeline corresponding to a water inlet of the first waterway switch, and the other end of the second water inlet pipeline is connected to the first water inlet pipeline corresponding to a water outlet of the first supercharging device. The second waterway switch, the air suction device, the second supercharging device and the flow limiting device are arranged on the second water inlet pipeline. By adopting the design mode, when the micro-bubble self-cleaning water purifier starts self-cleaning, impurities such as scale on the membrane surface of the membrane filter element are cleaned by utilizing local high temperature, high pressure and high impact force generated by collapse of micro-bubbles, the flux of the membrane filter element is recovered, and the service life of the membrane filter element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, in particular to a micro-bubble self-cleaning water purifier. Background Art

[0002] As people's living standards improve, they pay more and more attention to water quality and hygiene, and water purifiers have become an indispensable household appliance in people's lives. However, current water purifiers have the following shortcomings: on the one hand, after a period of use, the particles, colloids, and scale produced by water production in conventional water purifiers will contaminate the membrane surface of the membrane filter element. The contamination of the membrane surface will reduce the effective area of ​​the membrane filter element for water production and increase the water production resistance. The result is that the water flux of the membrane filter element is reduced and the amount of pure water is reduced, which will lead to a waste of water resources; on the other hand, the effect of conventional membrane flushing and tap water flushing on extending the life of the membrane filter element is very limited, and the life of the membrane filter element is reduced. Utility Model Content

[0003] In order to overcome at least one of the defects of the above-mentioned prior art, the utility model provides a microbubble self-cleaning water purifier to solve the problem that the membrane filter element of the existing water purifier will be clogged with dirt after being used for a period of time, resulting in a decrease in the pure wastewater ratio of the membrane filter element outlet and a shortened life of the membrane filter element.

[0004] The utility model is a technical solution adopted to solve the problem. The embodiment of the utility model discloses a microbubble self-cleaning water purifier, including a first water inlet pipeline, a second water inlet pipeline, a membrane filter element, a first water circuit switch, a first boosting device, a second water circuit switch, an air suction device, a second boosting device and a current limiting device. The first water inlet pipeline is connected to the water inlet end of the membrane filter element, the first water circuit switch and the first boosting device are sequentially arranged on the first water inlet pipeline along the water flow direction, one end of the second water inlet pipeline is connected to a position on the first water inlet pipeline corresponding to the water inlet of the first water circuit switch, and the other end is connected to a position on the first water inlet pipeline corresponding to the water outlet of the first boosting device, the second water circuit switch, the air suction device, the second boosting device and the current limiting device are sequentially arranged on the second water inlet pipeline along the water flow direction.

[0005] As an optional implementation, in an embodiment of the utility model, the microbubble self-cleaning water purifier also includes a first check valve, which is arranged on the second water inlet pipeline and located between the second boosting device and the flow limiting device.

[0006] As an optional implementation, in an embodiment of the utility model, the microbubble self-cleaning water purifier also includes a concentrate water pipeline, and the concentrate water pipeline is connected to the concentrate water outlet of the membrane filter element.

[0007] As an optional implementation, in an embodiment of the utility model, the micro-bubble self-cleaning water purifier also includes a third water circuit switch, and the third water circuit switch is arranged on the concentrated water pipeline.

[0008] As an optional implementation, in an embodiment of the utility model, the microbubble self-cleaning water purifier also includes a drinking water pipeline, and the drinking water pipeline is connected to the drinking water outlet of the membrane filter element.

[0009] As an optional implementation, in an embodiment of the utility model, the micro-bubble self-cleaning water purifier also includes a second check valve, and the second check valve is arranged at the air inlet of the air suction device.

[0010] As an optional implementation, in an embodiment of the utility model, the first water circuit switch and the second water circuit switch are both solenoid valves.

[0011] As an optional implementation, in an embodiment of the utility model, both the first boosting device and the second boosting device are diaphragm pumps.

[0012] As an optional implementation, in an embodiment of the utility model, the air suction device is a Venturi tube.

[0013] As an optional implementation, in the embodiment of the present utility model, the membrane filter element is a reverse osmosis membrane or a nanofiltration membrane.

[0014] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0015] The utility model provides a micro-bubble self-cleaning water purifier including a first water inlet pipeline, a second water inlet pipeline, a membrane filter element, a first water circuit switch, a first boosting device, a second water circuit switch, an air suction device, a second boosting device and a current limiting device. The first water inlet pipeline is connected to the membrane filter element, the first water circuit switch and the first boosting device are sequentially arranged on the first water inlet pipeline along the water flow direction, one end of the second water inlet pipeline is connected to a position on the first water inlet pipeline corresponding to the water inlet of the first water circuit switch, and the other end is connected to a position on the first water inlet pipeline corresponding to the water outlet of the first boosting device, and the second water circuit switch, the air suction device, the second boosting device and the current limiting device are sequentially arranged on the second water inlet pipeline along the water flow direction. Among them, the first water inlet pipe is connected to the membrane filter element, which can realize the water inlet function of the microbubble self-cleaning water purifier, and the second water inlet pipe is connected to the membrane filter element, which can realize the self-cleaning function of the microbubble self-cleaning water purifier. With such a design, when the membrane filter element is contaminated by impurities such as scale after being used for a period of time, the microbubble self-cleaning water purifier can start the self-cleaning function, prepare water containing microbubbles and pass it into the membrane filter element, and use the local high temperature, high pressure and high impact force generated by the collapse of microbubbles to clean away impurities such as scale on the membrane surface of the membrane filter element, thereby restoring the flux of the membrane filter element and increasing the service life of the membrane filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a micro-bubble self-cleaning water purifier in an embodiment of the utility model.

[0018] The meanings of the reference numerals are as follows:

[0019] 1-first water inlet pipeline; 2-second water inlet pipeline; 3-membrane filter element; 4-first water circuit switch; 5-first boosting device; 6-second water circuit switch; 7-air suction device; 8-second boosting device; 9-current limiting device; 10-second check valve; 11-first check valve; 12-concentrated water pipeline; 13-third water circuit switch; 14-drinking water pipeline. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0022] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0023] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0025] The technical solution of the utility model will be further described below in conjunction with embodiments and drawings.

[0026] See also Figure 1The embodiment of the utility model discloses a microbubble self-cleaning water purifier. The microbubble self-cleaning water purifier of the present scheme comprises a first water inlet pipeline 1, a second water inlet pipeline 2, a membrane filter element 3, a first water circuit switch 4, a first boosting device 5, a second water circuit switch 6, an air suction device 7, a second boosting device 8 and a current limiting device 9. The first water inlet pipeline 1 is connected to the water inlet end of the membrane filter element 3, the first water circuit switch 4 and the first boosting device 5 are sequentially arranged on the first water inlet pipeline 1 along the water flow direction, one end of the second water inlet pipeline 2 is connected to a position on the first water inlet pipeline 1 corresponding to the water inlet of the first water circuit switch 4, and the other end is connected to a position on the first water inlet pipeline 1 corresponding to the water outlet of the first boosting device 5, the second water circuit switch 6, the air suction device 7, the second boosting device 8 and the current limiting device 9 are sequentially arranged on the second water inlet pipeline 2 along the water flow direction. Among them, the first water inlet pipe 1 is connected to the membrane filter element 3, which can realize the water inlet function of the microbubble self-cleaning water purifier, and the second water inlet pipe 2 is connected to the membrane filter element 3, which can realize the self-cleaning function of the microbubble self-cleaning water purifier. With such a design, when the membrane filter element 3 is used for a period of time and is contaminated by impurities such as scale, the microbubble self-cleaning water purifier can start the self-cleaning function, prepare water containing microbubbles and pass it into the membrane filter element 3, and use the local high temperature, high pressure, and high impact force generated by the collapse of microbubbles to clean away impurities such as scale on the membrane surface of the membrane filter element 3, restore the flux of the membrane filter element 3, and improve the service life of the membrane filter element 3.

[0027] Among them, microbubbles are tiny bubbles with a diameter of less than 50 micrometers (μm) when bubbles occur, and can also be called micro-nano bubbles, micron bubbles or nano bubbles according to their diameter range. The microbubbles in this embodiment are preferably micro-nano bubbles.

[0028] The first water circuit switch 4 and the second water circuit switch 6 include a fully closed state and a fully open state. The pipeline is closed in the fully closed state and opened in the fully open state. The first water circuit switch 4 and the second water circuit switch 6 are manual valves, solenoid valves, etc. In this embodiment, the first water circuit switch 4 and the second water circuit switch 6 are both solenoid valves for example;

[0029] And, the first boosting device 5 and the second boosting device 8 are used to increase the pressure of the incoming water to achieve the normal water production pressure of the membrane filter element 3. The first boosting device 5 is a centrifugal pump, a diaphragm pump, a gear pump, a vacuum pump, a screw pump, a reciprocating pump, etc. In this embodiment, the first boosting device 5 and the second boosting device 8 are both diaphragm pumps for example;

[0030] And, the function of the flow limiting device 9 is to limit the flow and hold back the pressure of the water in the second water inlet pipeline 2. When the water containing air flows through the flow limiting device 9, the gas dissolved in the water will precipitate to form microbubble water. The flow limiting device 9 is a concentrated water solenoid valve, etc.;

[0031] And, the function of the air suction device 7 is to suck a certain amount of air into the second water inlet pipeline 2, the water inlet of the air suction device 7 is connected to the tap water, and the water outlet thereof is connected to the water inlet of the first boosting device 5, and the air suction device 7 is a venturi tube, which uses the venturi effect to suck air;

[0032] Furthermore, the membrane filter element 3 is used to remove ions in water to prepare pure water, and the membrane filter element 3 is a reverse osmosis membrane or a nanofiltration membrane.

[0033] In some embodiments, the microbubble self-cleaning water purifier also includes a concentrate water pipeline 12 and a drinking water pipeline 14. The concentrate water pipeline 12 is connected to the concentrate water outlet of the membrane filter element 3 for discharging the concentrate in the membrane filter element 3. The drinking water pipeline 14 is connected to the drinking water outlet of the membrane filter element 3 for discharging the tap water in the membrane filter element 3.

[0034] In some embodiments, in order to prevent water on the second water inlet pipe 2 from being discharged from the air inlet, the microbubble self-cleaning water purifier also includes a second check valve 10, which is arranged at the air inlet of the suction device 7, thereby preventing water on the second water inlet pipe 2 from being discharged from the air inlet.

[0035] In some embodiments, the microbubble self-cleaning water purifier further includes a first check valve 11, which is disposed on the second water inlet pipe 2 and between the second boosting device 8 and the current limiting device 9. With such a design, since the water on the second water inlet pipe 2 is limited by the current limiting device 9, the water pressure on the second water inlet pipe 2 will increase. The first check valve 11 is disposed between the second boosting device 8 and the current limiting device 9, which can prevent the water on the second water inlet pipe 2 from flowing back under the action of pressure.

[0036] In some embodiments, the microbubble self-cleaning water purifier further includes a third water circuit switch 13, which is disposed on the concentrated water pipeline 12. The third water circuit switch 13 includes a current limiting state and a fully open state, and the third water circuit switch 13 is a concentrated water solenoid valve, etc. The third water circuit switch 13 is kept in a closed state during water production, at which time the current is limited and the pressure is held back to ensure normal water production; the third water circuit switch 13 is opened when the membrane filter element 3 is cleaned, and at this time it is in a fully open state.

[0037] When the microbubble self-cleaning water purifier of this scheme produces water: the first water circuit switch 4 and the first boosting device 5 are opened, the third water circuit switch 13 is closed and the flow is limited and the pressure is held back, the second water circuit switch 6, the air suction device 7 and the flow limiting device 9 are closed, the tap water enters the first water inlet pipe 1, is pressurized by the first boosting device 5 after passing through the first water circuit switch 4, and flows through the membrane filter element 3, the pure water of the membrane filter element 3 flows to the drinking water pipe 14, and the concentrated water flows to the concentrated water pipe 12.

[0038] When the microbubble self-cleaning water purifier of the present scheme cleans the membrane filter element 3: the second water circuit switch 6, the air suction device 7, the second boosting device 8, the current limiting device 9 and the third water circuit switch 13 are turned on, the first water circuit switch 4 and the first boosting device 5 are turned off, the tap water enters the second water inlet pipe 2, flows through the second water circuit switch 6, the air is sucked into the air suction device 7 and then mixed into the tap water, the tap water containing air is pressurized by the second boosting device 8 and then dissolved into the water, and the pressure drops sharply when passing through the current limiting device, the air in the water is precipitated into microbubbles, and the water containing microbubbles flows to the membrane filter element 3, which can clean the pollutants attached to the surface of the membrane filter element 3, thereby restoring the flux of the membrane filter element 3, which can not only improve the life of the membrane filter element 3, but also save water, and the concentrated water of the membrane filter element 3 flows to the concentrated water pipeline 12.

[0039] Among them, the principle of water containing microbubbles to clean the membrane surface dirt in the membrane filter element 3 is that the microbubbles will gradually collapse in the process of flowing through the membrane surface. When the microbubbles collapse, there will be a strong impact force locally. This impact force of collapse can impact the pollutants on the membrane surface, causing the pollutants on the membrane surface to fall off, thereby achieving the purpose of cleaning the membrane surface.

[0040] The utility model provides a microbubble self-cleaning water purifier, which comprises a first water inlet pipeline 1, a second water inlet pipeline 2, a membrane filter element 3, a first water circuit switch 4, a first boosting device 5, a second water circuit switch 6, an air suction device 7, a second boosting device 8 and a current limiting device 9. The first water inlet pipeline 1 is connected to the water inlet end of the membrane filter element 3, the first water circuit switch 4 and the first boosting device 5 are sequentially arranged on the first water inlet pipeline 1 along the water flow direction, one end of the second water inlet pipeline 2 is connected to a position on the first water inlet pipeline 1 corresponding to the water inlet of the first water circuit switch 4, and the other end is connected to a position on the first water inlet pipeline 1 corresponding to the water outlet of the first boosting device 5, and the second water circuit switch 6, the air suction device 7, the second boosting device 8 and the current limiting device 9 are sequentially arranged on the second water inlet pipeline 2 along the water flow direction. Among them, the first water inlet pipe 1 is connected to the membrane filter element 3, which can realize the water inlet function of the microbubble self-cleaning water purifier, and the second water inlet pipe 2 is connected to the membrane filter element 3, which can realize the self-cleaning function of the microbubble self-cleaning water purifier. With such a design, when the membrane filter element 3 is used for a period of time and is contaminated by impurities such as scale, the microbubble self-cleaning water purifier can start the self-cleaning function, prepare water containing microbubbles and pass it into the membrane filter element 3, and use the local high temperature, high pressure, and high impact force generated by the collapse of microbubbles to clean away impurities such as scale on the membrane surface of the membrane filter element 3, restore the flux of the membrane filter element 3, and improve the service life of the membrane filter element 3.

[0041] The above is a detailed introduction to a microbubble self-cleaning water purifier disclosed in an embodiment of the present invention. This article uses individual examples to illustrate the principle and implementation method of the present invention. The description of the above embodiment is only used to help understand the microbubble self-cleaning water purifier of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A microbubble self-cleaning water purifier, characterized in that: The invention comprises a first water inlet pipeline (1), a second water inlet pipeline (2), a membrane filter element (3), a first water circuit switch (4), a first pressure-boosting device (5), a second water circuit switch (6), an air suction device (7), a second pressure-boosting device (8) and a flow-limiting device (9); the first water inlet pipeline (1) is connected to the water inlet end of the membrane filter element (3); the first water circuit switch (4) and the first pressure-boosting device (5) are arranged on the first water inlet pipeline (1) in sequence along the water flow direction; one end of the second water inlet pipeline (2) is connected to a position on the first water inlet pipeline (1) corresponding to the water inlet of the first water circuit switch (4), and the other end is connected to a position on the first water inlet pipeline (1) corresponding to the water outlet of the first pressure-boosting device (5); the second water circuit switch (6), the air suction device (7), the second pressure-boosting device (8) and the flow-limiting device (9) are arranged on the second water inlet pipeline (2) in sequence along the water flow direction.

2. The microbubble self-cleaning water purifier according to claim 1, characterized in that: The micro-bubble self-cleaning water purifier further comprises a first check valve (11), wherein the first check valve (11) is arranged on the second water inlet pipeline (2) and is located between the second pressure boosting device (8) and the flow limiting device (9).

3. The microbubble self-cleaning water purifier according to claim 1, characterized in that: The microbubble self-cleaning water purifier further comprises a concentrated water pipeline (12), wherein the concentrated water pipeline (12) is connected to the concentrated water outlet of the membrane filter element (3).

4. The microbubble self-cleaning water purifier according to claim 3, characterized in that: The microbubble self-cleaning water purifier further comprises a third water circuit switch (13), wherein the third water circuit switch (13) is arranged on the concentrated water pipeline (12).

5. The microbubble self-cleaning water purifier according to claim 1, characterized in that: The microbubble self-cleaning water purifier further comprises a drinking water pipeline (14), wherein the drinking water pipeline (14) is connected to the drinking water outlet of the membrane filter element (3).

6. The microbubble self-cleaning water purifier according to any one of claims 1 to 5, characterized in that: The micro-bubble self-cleaning water purifier further comprises a second check valve (10), wherein the second check valve (10) is arranged at the air inlet of the air suction device (7).

7. The microbubble self-cleaning water purifier according to any one of claims 1 to 5, characterized in that: The first water circuit switch (4) and the second water circuit switch (6) are both solenoid valves.

8. The microbubble self-cleaning water purifier according to any one of claims 1 to 5, characterized in that: The first pressure boosting device (5) and the second pressure boosting device (8) are both diaphragm pumps.

9. The microbubble self-cleaning water purifier according to any one of claims 1 to 5, characterized in that: The air suction device (7) is a Venturi tube.

10. The microbubble self-cleaning water purifier according to any one of claims 1 to 5, characterized in that: The membrane filter element (3) is a reverse osmosis membrane or a nanofiltration membrane.

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