Filtering device

Abstract

The utility model discloses a filtering device, and relates to the technical field of water purification, the filtering device comprises a shell mechanism with a first port and a second port; the separating mechanism is used for separating the interior of the shell mechanism into a first cavity and a second cavity, the first cavity is communicated with the first port, and the second cavity is communicated with the second port; the hollow membrane silk is arranged on the separation mechanism in a penetrating manner, the inner side of the hollow membrane silk is communicated with the second chamber, and the outer side of the hollow membrane silk is communicated with the first chamber; the gas-liquid mixing unit is provided with a water inlet end and a gas inlet end, and an outlet of the gas-liquid mixing unit is communicated with the second cavity. The problem that the membrane flux recovery rate of the cleaned hollow membrane filaments is low can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification technical field, especially a filter device. BACKGROUND

[0002] In the current commercial water purification field, many industries have high demand for water purification devices with large water flow, and chain tea shops, restaurants and the like are typical representatives. The continuous and large water demand of such places requires the water purification device to operate efficiently at all times to ensure that the water quality meets the health standards and meets the business requirements of beverage production, dish washing and the like. However, the frequent large water flow usage mode directly leads to a significant increase in the replacement frequency of consumables of the water purification device. For example, a conventional filter element may need to be replaced only once every six months or even a year in an ordinary household use scenario, but in such a commercial scenario, it may need to be replaced in just one or two months, greatly increasing the user's use cost and becoming a significant factor restricting the improvement of the operating efficiency of related enterprises.

[0003] To cope with the demand for large water flow, hollow membrane filament type filter elements are widely used in commercial water purification devices. Hollow membrane filaments can achieve a large water flow under the premise of ensuring a certain filtration precision due to their special structure. However, as the water flow of the water purification device continues to accumulate, the hollow membrane filaments face a serious fouling problem. During long-term operation, various impurities in the water, such as microorganisms, colloids, and organic macromolecules, will gradually deposit on the surface and inside the micropores of the hollow membrane filaments. This impurity deposition phenomenon causes the membrane flux of the hollow membrane filaments to continuously decrease. Even if conventional simple cleaning methods are used, the recovery rate of the membrane flux is at a low level, and the fouling condition of the hollow membrane filaments is difficult to effectively reverse. This not only greatly reduces the water purification efficiency of the water purification device, making it difficult to meet the stable demand for water quantity and quality in commercial places, but also greatly shortens the service life of the hollow membrane filaments, further increasing the economic burden and equipment maintenance cost of users, and new technical solutions are urgently needed to solve this industry problem. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the utility model is to provide a filter device which can solve the problem of low membrane flux recovery rate of the hollow membrane filaments after cleaning.

[0005] The specific technical scheme of the embodiments of the utility model is:

[0006] A filter device, the filter device comprising:

[0007] A housing mechanism having a first port and a second port;

[0008] a partition mechanism partitioning the housing mechanism into a first chamber and a second chamber, the first chamber being in communication with the first port, the second chamber being in communication with the second port;

[0009] a hollow membrane filament passing through the partition mechanism, the inside of the hollow membrane filament being in communication with the second chamber, the outside of the hollow membrane filament being in communication with the first chamber;

[0010] a gas-liquid mixing unit having a water inlet end and a gas inlet end, an outlet of the gas-liquid mixing unit being in communication with the second chamber.

[0011] Preferably, the filtration device has a backwash mode, in which the water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs the formed gas-liquid mixture to the inside of the hollow membrane filament through the second chamber.

[0012] Preferably, in the backwash mode, the first port inputs water to the first chamber.

[0013] Preferably, the water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs the formed gas-liquid mixture to the inside of the hollow membrane filament through the second chamber, simultaneously with the first port inputting water to the first chamber.

[0014] Preferably, the backwash mode has a first stage and a second stage, in the first stage, the water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs the formed gas-liquid mixture to the inside of the hollow membrane filament through the second chamber; in the second stage, the first port inputs water to the first chamber.

[0015] Preferably, the first stage and the second stage are alternately performed.

[0016] Preferably, the housing mechanism has a blowdown port, the blowdown port being capable of being switched on and off.

[0017] Preferably, in the backwash mode, the blowdown port is in a communication state to discharge the sewage in the first chamber.

[0018] Preferably, the outlet of the gas-liquid mixing unit is in communication with the second port, thereby being in communication with the second chamber.

[0019] Preferably, the gas-liquid mixing unit is located in the second chamber.

[0020] Preferably, the gas-liquid mixing unit comprises a Venturi unit, a throat of the Venturi unit having the gas inlet end.

[0021] Preferably, the filter device has a water purification mode in which the first port inputs raw water and the second port outputs purified water.

[0022] Preferably, the filter device comprises:

[0023] A flow guide member disposed in the first chamber, the flow guide member causing water input from the first port into the first chamber to rotate in a first preset direction about an axis of the housing mechanism.

[0024] Preferably, the filter device comprises:

[0025] A water inlet pipe passing through the partition mechanism, the water inlet pipe having a water outlet on a side wall thereof in the first chamber.

[0026] Preferably, the water outlet enables the output water to rotate in a second preset direction about an axis of the water inlet pipe.

[0027] Preferably, the first preset direction is the same as the second preset direction.

[0028] Preferably, the filter device has a backwashing mode in which the water inlet pipe inputs water into the first chamber.

[0029] Preferably, the filter device has a water purification mode in which the water inlet pipe inputs water into the first chamber.

[0030] Preferably, the flow guide member is sleeved outside the partition mechanism, the flow guide member divides the first chamber into a first chamber first part and a first chamber second part below the first chamber first part, the first chamber first part being in communication with the first port; the flow guide member has a plurality of circumferentially distributed flow guide openings, the flow guide openings being in communication between the first chamber first part and the first chamber second part; the flow guide openings have an inclination angle to cause water input into the first chamber second part to rotate in a first preset direction about an axis of the housing mechanism.

[0031] Preferably, the flow guide member has an outer side wall in a sealed state with an inner side wall of the housing mechanism.

[0032] Preferably, the filter device comprises:

[0033] A water inlet path, the water inlet path being in communication with the first port, an inlet of the water inlet pipe, and a water inlet end of the gas-liquid mixing unit.

[0034] Preferably, the water inlet path and the water inlet end of the gas-liquid mixing unit have a first control valve unit capable of controlling on-off.

[0035] Preferably, the water outlet is multiple, and the multiple water outlets are arranged along the axial direction of the water inlet pipe and / or distributed around the circumference of the water inlet pipe.

[0036] Preferably, the filter device comprises:

[0037] A purified water output waterway is in communication with the second port through a second control valve unit capable of controlling on-off.

[0038] Preferably, the outlet of the gas-liquid mixing unit is in communication with the second port through a one-way valve, so as to be in communication with the second chamber; the one-way valve is conductive from the outlet of the gas-liquid mixing unit to the second port.

[0039] Preferably, the separation mechanism comprises:

[0040] A fixing member, in which the hollow membrane wire is arranged;

[0041] A water distribution end cover, which forms the second chamber with the fixing member, and has a water outlet on the water distribution end cover, the water outlet being in communication with the second port.

[0042] Preferably, the shell mechanism comprises:

[0043] A shell having an opening;

[0044] A conversion joint arranged at the opening, the conversion joint having the first port and the second port;

[0045] The water outlet of the water distribution end cover is installed in cooperation with the conversion joint, so that the water outlet is in communication with the second port.

[0046] Preferably, the filter device comprises:

[0047] A water inlet pipe arranged on the separation mechanism, and having a water outlet on the side wall of the water inlet pipe in the first chamber;

[0048] The conversion joint has a third port for communication with a water inlet waterway, and the inlet of the water inlet pipe is installed in cooperation with the conversion joint, so that the inlet of the water inlet pipe is in communication with the third port.

[0049] Preferably, the blowdown port is located at the bottom wall of the shell mechanism, and the bottom wall has an upward trend around the blowdown port.

[0050] Preferably, the first chamber is provided with a limiting plate for limiting the axial and / or radial position of the water inlet pipe, the outer side wall of the limiting plate abuts against the inner side wall of the shell mechanism, and the lower end of the water inlet pipe is connected to the limiting plate.

[0051] Preferably, the limiting plate has a hollow structure, and a spacing gap is formed between the limiting plate and the bottom wall of the shell mechanism; the bottom wall of the shell mechanism has a recess, and the shell mechanism has a blowdown port located at the bottom of the recess.

[0052] Preferably, the hollow membrane filaments on the separation mechanism are divided into multiple regions, and the hollow membrane filaments in each region are sleeved with a mesh bag to separate the hollow membrane filaments in different regions.

[0053] Preferably, the extension direction of the water outlet is tangent to the inner side wall of the water inlet pipe.

[0054] Preferably, the filter device comprises:

[0055] A blowdown pipeline in communication with the blowdown port, and a on-off valve arranged on the blowdown pipeline to enable the blowdown port to be opened and closed.

[0056] Preferably, the hollow membrane filaments comprise ultrafiltration membrane filaments.

[0057] The technical scheme of the utility model has the following remarkable beneficial effects:

[0058] As the filter device filters raw water, the water volume continuously accumulates, and various impurities in the water gradually deposit on the outer surface of the hollow membrane filaments and in the micropores, and the membrane flux of the hollow membrane filaments continuously decreases. At this time, the filter device can be backwashed. During backwashing, water is input to the water inlet end, and gas is input to the air inlet end. The gas-liquid mixing unit forms a gas-liquid mixture containing a large number of micro-bubbles. The formed gas-liquid mixture is input to the inside of the shell mechanism and is transmitted to the inner side of the hollow membrane filaments through the second chamber. During the process of the gas-liquid mixture flowing from the inner side of the hollow membrane filaments to the outer side of the hollow membrane filaments, the flow direction of the water in the hollow membrane filaments is opposite to the flow direction of the water when the hollow membrane filaments filter water. This can help the impurities deposited in the micropores of the hollow membrane filaments to be flushed to the outer surface of the hollow membrane filaments, and then, together with the impurities deposited on the outer surface of the hollow membrane filaments, flow into the first chamber with the water. In addition, the micro-bubbles in the gas-liquid mixture can clean the impurities in the micropores when passing through the hollow membrane filaments, which helps the impurities to be separated from the micropores. Through the above process, the impurities deposited on the outer side of the hollow membrane filaments and in the micropores can be effectively cleaned, the recovery rate of the membrane flux of the hollow membrane filaments is effectively improved, the fouling condition of the hollow membrane filaments is effectively reversed, and the water purification effect of the filter device can still be maintained at a high level to meet the needs of users, thereby reducing the economic burden and equipment maintenance cost of users.

[0059] Specific embodiments of the present application are disclosed herein, and will be fully understood by reference to the following description and drawings. The principles of the present application, however, can be employed in any of numerous arrangements not expressly described herein. It will be appreciated that those skilled in the art will be able to devise numerous arrangements that, although not explicitly described herein, embody the principles of the application and are thus within the spirit and scope of the application. It will be understood that the embodiments described herein are merely exemplary of the principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0060] The drawings described herein are for purposes of illustration only and are not intended to limit the scope of the present application in any way. Additionally, those skilled in the art will recognize that the drawings described herein are not necessarily drawn to scale and that, unless otherwise specifically stated, the dimensions of the various features in the drawings are intended to be approximate only. Moreover, the particulars shown in the drawings are by way of example and for purposes of illustrative clarity only.

[0061] Figure 1 is a structural schematic view of the filter device in the backwashing mode in the embodiment of the present application;

[0062] Figure 2 is a structural schematic view of the filter device in the water purification mode in the embodiment of the present application;

[0063] Figure 3 is a sectional view of the inside of the shell mechanism of the filter device in the embodiment of the present application;

[0064] Figure 4 is a structural schematic view of the water inlet pipe of the filter device in the embodiment of the present application;

[0065] Figure 5 is a structural schematic view of the water inlet pipe of the filter device in the embodiment of the present application; Figure 4 is a sectional view of the A-A portion in the embodiment of the present application;

[0066] Figure 6 is a structural schematic view of the flow guide of the filter device in the embodiment of the present application;

[0067] Figure 7 is a partial sectional schematic view of the flow guide of the filter device in the embodiment of the present application;

[0068] Figure 8 is a structural schematic view of the water separation end cover in the separation mechanism of the filter device in the embodiment of the present application;

[0069] Figure 9 is an exploded view of the shell mechanism and the internal components of the filter device in the embodiment of the present application.

[0070] Reference numerals in the above drawings:

[0071] 1, shell mechanism; 11, first port; 12, second port; 13, first chamber; 131, first chamber first part; 132, first chamber second part; 14, second chamber; 15, blowdown port; 16, shell; 161, opening; 17, transition joint; 18, recess; 2, separation mechanism; 21, fixing piece; 22, water separation end cover; 221, water gap; 222, outer extension; 223, inner extension; 3, hollow membrane filament; 4, gas-liquid mixing unit; 41, water inlet end; 42, gas inlet end; 5, flow guide; 51, flow guide gap; 6, water inlet pipe; 61, water outlet; 7, water inlet waterway; 8, first control valve unit; 9, clean water output waterway; 10, second control valve unit; 101, check valve; 102, limiting plate; 103, blowdown line; 1031, on-off valve. DETAILED DESCRIPTION

[0072] The details of the present application described herein can be more clearly understood with reference to the accompanying drawings and the description of specific embodiments of the present application. However, the specific embodiments of the present application described herein are only for the purpose of explaining the present application and should not be understood as limiting the present application in any way. Based on the teachings of the present application, those skilled in the art can conceive of any possible variations of the present application, which should be considered to fall within the scope of the present application. It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "mounting", "connection", and "connection" should be interpreted broadly, for example, they can be mechanical connection or electrical connection, or they can be internal connection of two elements, or they can be direct connection or indirect connection through a middle medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0074] In order to solve the problem of low membrane flux recovery rate of hollow membrane filaments after cleaning, a filter device is provided in the present application, Figure 1 The structure of the filter device in the embodiment of the present application is shown in the figure.Figure 9 This is an exploded view of the housing mechanism and internal components of the filter device in an embodiment of this utility model, as shown below. Figure 1 and Figure 9 As shown, the filtration device may include: a housing mechanism 1 having a first port 11 and a second port 12; a partition mechanism 2 dividing the interior of the housing mechanism 1 into a first chamber 13 and a second chamber 14, wherein the first chamber 13 is connected to the first port 11 and the second chamber 14 is connected to the second port 12; a hollow membrane filament 3 passing through the partition mechanism 2, wherein the inner side of the hollow membrane filament 3 is connected to the second chamber 14 and the outer side of the hollow membrane filament 3 is connected to the first chamber 13; and a gas-liquid mixing unit 4 having a water inlet end 41 and an air inlet end 42, wherein the outlet of the gas-liquid mixing unit 4 is connected to the second chamber 14.

[0075] As the filtration device filters the raw water, the water flow continuously accumulates, and various impurities in the water gradually deposit on the outer surface of the hollow membrane filaments 3 and in the micropores. The membrane flux of the hollow membrane filaments 3 continues to decrease. At this time, the filtration device can be backwashed. During backwashing, water is input into the water inlet 41 and gas is input into the air inlet 42. The gas-liquid mixing unit 4 forms a gas-liquid mixture containing a large number of microbubbles. The formed gas-liquid mixture is input into the housing mechanism 1 and transported to the inner side of the hollow membrane filaments 3 through the second chamber 14. During the process of the gas-liquid mixture flowing from the inside to the outside of the hollow membrane filament 3, the water flow direction within the hollow membrane filament 3 is opposite to the water flow direction during water filtration. This helps to flush impurities deposited in the micropores of the hollow membrane filament 3 to the outer surface of the filament 3, where they are then carried away with the water and flow into the first chamber 13 along with the impurities deposited on the outer surface. Furthermore, the microbubbles in the gas-liquid mixture effectively clean the impurities within the micropores as they pass through the hollow membrane filament 3, facilitating their removal. This process effectively cleans the impurities deposited on the outside and inside the micropores of the hollow membrane filament 3, thereby significantly improving the membrane flux recovery rate and reversing the fouling condition. The filtration effect remains at a high level, meeting user needs and reducing the user's economic burden and equipment maintenance costs.

[0076] For the micro-bubbles in the gas-liquid mixture, when passing through the hollow membrane filament 3, it can play a good cleaning effect on the impurities in the micropore, which may mainly involve the following aspects. First, the impact force effect; the micro-bubbles will break under certain conditions in the liquid. When the micro-bubbles break, a strong impact force will be generated in the small area around it. This is because there is a certain pressure inside the micro-bubbles, and the external liquid pressure is relatively low. When the bubble breaks, the internal pressure is rapidly released, forming a strong outward impact force, similar to a small "explosion". This impact force can directly act on the impurities on the surface and inside the micropore, and shake off or wash away the impurities that are not firmly attached from the micropore. Second, the jet effect; in addition to the overall impact force generated during the breaking of the micro-bubbles, jet phenomenon will also be caused. Due to the asymmetry of the bubble breaking and other factors, high-speed jets will be formed around the bubble. These jets have high speed and energy, and can penetrate into the micropore like a small high-pressure water gun, and wash out the impurities therein. The direction and intensity of the jet have a certain randomness, which can improve the effect of removing impurities by washing the micropore from different angles. Third, cavitation effect; when the micro-bubbles exist, a local low-pressure area will be formed around the micro-bubbles. When the micro-bubbles break, this low-pressure state will suddenly change, causing the dissolved gas (such as air) in the liquid to be re-dissolved or form new micro-bubbles in a very short time, which is called cavitation. The cavitation process will produce a series of complex physical phenomena, such as local high temperature, high pressure and strong shock wave. These effects can further destroy the bonding force between the impurities and the micropore wall, making the impurities more easily separated from the micropore, and also helping to decompose some organic substances that may block the micropore. Fourth, interface effect; the micro-bubbles have an interface with the impurities and the micropore surface in the liquid. The surface of the micro-bubbles can have a certain charge and surface active substance, which makes the micro-bubbles have a certain interaction with the impurities. Before the micro-bubbles break, it may have a certain degree of combination with the impurities through electrostatic attraction, surface adsorption and the like. When the micro-bubbles break, the combination state is broken, and the flow of the liquid around the micro-bubbles will carry away the impurities combined with the micro-bubbles, playing a role in cleaning the micropore. In addition, the liquid flow generated when the micro-bubbles break can also improve the boundary layer of the liquid around the micropore, reduce the deposition and adhesion of the impurities near the micropore, thereby facilitating the removal of the impurities and preventing re-blocking.

[0077] Figure 3 The cross-sectional view of the shell mechanism inside the filtering device in the embodiment of the utility model is shown in Figure 3As shown, the shell structure 16 can form a container structure, which can have the first port 11 and the second port 12. The first port 11 and the second port 12 can be directly located on the container structure or indirectly located on the container structure, as long as the first port 11 and the second port 12 can be in communication with the inside of the shell structure 16 to input or output fluid. The separation mechanism 2 separates the shell mechanism 1 into the first chamber 13 and the second chamber 14, which are not in communication, so that the raw water to be filtered and the purified water formed after being filtered by the hollow membrane filament 3 are separated. The first chamber 13 is in communication with the first port 11, and the second chamber 14 is in communication with the second port 12. The first port 11 can be used to input the raw water (water to be filtered) into the first chamber 13. The second port 12 can be used to output the purified water formed after being filtered by the hollow membrane filament 3 in the second chamber 14, or can be used to input the gas-liquid mixture for backwashing into the second chamber 14 during backwashing, which can be the gas-liquid mixture generated by the gas-liquid mixing unit 4. The hollow membrane filament 3 is arranged on the separation mechanism 2, so that the inside of the hollow membrane filament 3 is in communication with the second chamber 14, and the outside of the hollow membrane filament 3 is in communication with the first chamber 13. When the hollow membrane filament 3 filters the input raw water, the raw water penetrates the hollow membrane filament 3 from the outside of the hollow membrane filament 3 to form purified water in the inside of the hollow membrane filament 3, and the purified water flows into the second chamber 14 through the inside of the hollow membrane filament 3.

[0078] In an embodiment, as shown in Figure 3 The separation mechanism 2 can include a fixing member 21 and a water distribution end cover 22. The hollow membrane filament 3 is arranged in the fixing member 21. The water distribution end cover 22 is located above the fixing member 21, and the water distribution end cover 22 can have an extension 222 extending downward, which is sleeved outside the fixing member 21 and is in sealing connection with the fixing member 21. The second chamber 14 is formed between the water distribution end cover 22 and the fixing member 21. The water distribution end cover 22 has a water outlet 221, which is in communication with the second port 12.

[0079] Further, as shown in Figure 3 The shell mechanism 1 can include a shell 16 having an opening 161, and a conversion joint 17 arranged at the opening 161 and having the first port 11 and the second port 12. The water outlet 221 of the water distribution end cover 22 is installed in cooperation with the conversion joint 17 to make the water outlet 221 in communication with the second port 12. For example, Figure 8 A structure diagram of the water distribution end cover in the separation mechanism of the filtering device in the embodiment of the utility model is shown in Figure 8As shown, the middle part of the water distribution end cover 22 can have an inner extension 223 extending upward, the inner extension 223 extends circumferentially to form a water outlet 221, the inner extension 223 can be inserted into the conversion joint 17, so as to be installed in cooperation with the conversion joint 17, and then the water outlet 221 is in communication with the second port 12.

[0080] The hollow membrane filament 3 can be made of different types of membranes, for example, it can be an ultrafiltration membrane filament, a reverse osmosis membrane filament, a microporous filtration membrane filament, etc. Further, in order to balance the membrane flux, water purification effect and service life, the ultrafiltration membrane filament can be preferred, so that the hollow membrane filament 3 meets the requirements of the filtration device for commercial use. For example, when the ultrafiltration membrane filament is used, the filtration device is backwashed, and after backwashing, the clean water flow of the filtration device can be restored to 95.4% of the initial value, which is obvious.

[0081] As feasible, as shown in the drawings, Figure 3 As shown, the hollow membrane filament 3 can be vertically arranged, and only one end is arranged on the partition mechanism 2, and the inner side of the hollow membrane filament 3 can be in communication with the second chamber 14 at one end and closed at the other end. In another possible embodiment, the hollow membrane filament 3 can be arranged in a U shape, both ends of the hollow membrane filament 3 are arranged on the partition mechanism 2, and the inner side of the hollow membrane filament 3 can be in communication with the second chamber 14 at one end, and the inner side of the hollow membrane filament 3 can be in communication with the second chamber 14 at the other end or closed.

[0082] As shown, Figure 1 As shown, the gas-liquid mixing unit 4 can have a water inlet end 41 and an air inlet end 42, the water inlet end 41 of the gas-liquid mixing unit 4 is used for inputting water for backwashing, which can be ordinary raw water or clean water, which is not limited here. The water inlet end 41 of the gas-liquid mixing unit 4 is used for inputting gas for backwashing, which only needs to meet the requirement of being mixed with the water input by the water inlet end 41 to form a gas-liquid mixture, and the gas-liquid mixture has micro-bubbles, therefore, the specific type of the gas is not limited here, which can be air, carbon dioxide, nitrogen, oxygen, etc. The gas-liquid mixing unit 4 is used for forming a gas-liquid mixture when backwashing, and inputting the formed gas-liquid mixture into the second chamber 14, and then into the inner side of the hollow membrane filament 3.

[0083] In one embodiment, the outlet of the gas-liquid mixing unit 4 is in communication with the second port 12, thereby being in communication with the second chamber 14. In this embodiment, the gas-liquid mixing unit 4 is located outside the second chamber 14. In another embodiment, the gas-liquid mixing unit 4 can be directly located in the second chamber 14, so that the outlet of the gas-liquid mixing unit 4 is in communication with the second chamber 14.

[0084] For example, the gas-liquid mixing unit 4 can adopt a Venturi unit, the throat of the Venturi unit has an air inlet end 42, and water will suck gas into the water when flowing through the throat of the Venturi unit, thereby forming a gas-liquid mixture with micro-bubbles, and the gas-liquid mixture is output from the outlet of the Venturi unit.

[0085] Based on the structure of the filter device, the filter device can have a backwashing mode. In the backwashing mode, the water inlet end 41 inputs water, the air inlet end 42 inputs gas, and the gas-liquid mixing unit 4 forms a gas-liquid mixture which is output to the inside of the hollow membrane filaments 3 through the second chamber 14. As the filter device filters raw water, the water volume continues to accumulate, and various impurities in the water gradually deposit on the outer surface of the hollow membrane filaments 3 and in the micropores, and the membrane flux of the hollow membrane filaments 3 continues to decline. At this time, the filter device can perform the backwashing mode. The gas-liquid mixture formed by the gas-liquid mixing unit 4 is input into the inside of the shell mechanism 1 and is output to the inside of the hollow membrane filaments 3 through the second chamber 14. In the process of the gas-liquid mixture passing through the hollow membrane filaments 3 from the inside of the hollow membrane filaments 3 to the outside of the hollow membrane filaments 3, the flow direction of the water in the hollow membrane filaments 3 is opposite to the flow direction of the water when the hollow membrane filaments 3 filter water, which can help to flush the impurities deposited in the micropores of the hollow membrane filaments 3 to the outer surface of the hollow membrane filaments 3, and then flow into the first chamber 13 with the impurities deposited on the outer surface of the hollow membrane filaments 3 and the water. In addition, the micro-bubbles in the gas-liquid mixture can effectively clean the impurities in the micropores when passing through the hollow membrane filaments 3, which can help the impurities to be separated from the micropores. Through the backwashing mode, the impurities deposited on the outside of the hollow membrane filaments 3 and in the micropores can be effectively cleaned, thereby effectively improving the recovery rate of the membrane flux of the hollow membrane filaments 3, effectively reversing the fouling condition of the hollow membrane filaments 3, and maintaining the water purification effect of the filter device at a high level to meet the needs of users, thereby reducing the economic burden and equipment maintenance cost of users.

[0086] As a possibility, in the backwashing mode, the first port 11 can input water to the first chamber 13. The water input from the first port 11 to the first chamber 13 can flush the outer surface of the hollow membrane filaments 3, thereby helping to flush the impurities deposited in the micropores of the hollow membrane filaments 3 and the impurities on the outer surface of the hollow membrane filaments 3 to the outer surface of the hollow membrane filaments 3, and then into the first chamber 13. The water input from the first port 11 to the first chamber 13 can be easily discharged from the filter device later. The water flow and water pressure of the gas-liquid mixture formed by the gas-liquid mixing unit 4 are limited when backwashing the hollow membrane filaments 3, and the gas-liquid mixture passing through the hollow membrane filaments 3 is difficult to completely flush the impurities from the outer surface of the hollow membrane filaments 3, so the water input from the first port 11 to the first chamber 13 can be used for auxiliary flushing.

[0087] In the above process, the water inlet end 41 inputs water, the gas inlet end 42 inputs gas, the gas-liquid mixing unit 4 inputs the formed gas-liquid mixture to the inside of the hollow membrane wire 3 through the second chamber 14, and the first port 11 inputs water to the first chamber 13, which can be performed synchronously or asynchronously. When performed synchronously, due to the water with a certain height in the first chamber 13, this part of water can form a certain pressure on the outside of the hollow membrane wire 3, thereby playing a certain protective role to the hollow membrane wire 3, and can reduce the damage and rupture of the hollow membrane wire 3 caused by the excessive pressure of the water input from the inside of the hollow membrane wire 3.

[0088] When performed asynchronously, the backwashing mode has a first stage and a second stage. In the first stage, the water inlet end 41 inputs water, the gas inlet end 42 inputs gas, and the gas-liquid mixing unit 4 inputs the formed gas-liquid mixture to the inside of the hollow membrane wire 3 through the second chamber 14. In the second stage, the first port 11 inputs water to the first chamber 13. At least part of the second stage can be performed after the first stage. As a preferred, in order to improve the effect of flushing the impurities deposited in the micropores of the hollow membrane wire 3 and the impurities on the outer surface of the hollow membrane wire 3 away from the outer surface of the hollow membrane wire 3, the first stage and the second stage can be alternately performed for several times.

[0089] As a feasible, as shown in Figure 1 and Figure 3 , the shell mechanism 1 can have a blowdown port 15, which can be opened and closed. When it is needed to discharge the water containing impurities after flushing in the first chamber 13, the blowdown port 15 can be opened. The blowdown port 15 can be opened at the same time when the gas-liquid mixing unit 4 inputs the formed gas-liquid mixture to the inside of the hollow membrane wire 3 through the second chamber 14, or can be opened after the gas-liquid mixing unit 4 inputs the formed gas-liquid mixture to the inside of the hollow membrane wire 3 through the second chamber 14 and the water in the first chamber 13 is accumulated to a certain degree, or can be opened when the first port 11 inputs water to the first chamber 13, or can be opened after the first port 11 inputs water to the first chamber 13 and the water in the first chamber 13 is accumulated to a certain degree.

[0090] In order to control the opening and closing of the blowdown port 15, as a feasible, as shown in Figure 1 , the filter device can include a blowdown pipeline 103 in communication with the blowdown port 15, and a valve 1031 is arranged on the blowdown pipeline 103 to enable the blowdown port 15 to be opened and closed.

[0091] As a feasible, the blowdown port 15 can be located at the bottom wall of the shell mechanism 1, and the bottom wall has an upward trend from the position of the blowdown port 15 to its periphery. In this way, it is beneficial for the impurities on the bottom wall to move towards the blowdown port 15 along with the water flow, and it is beneficial for the impurities on the bottom wall to be discharged out of the shell mechanism 1 through the blowdown port.

[0092] Based on the structure of the above-mentioned filtration device, the filtration device can have a water purification mode. Figure 2 This is a schematic diagram of the filtration device in water purification mode in an embodiment of this utility model, as shown below. Figure 2 As shown, in the water purification mode, raw water is input into the first port 11. After the raw water enters the first chamber 13, it flows from the outside of the hollow membrane filament 3 through the hollow membrane filament 3 to the inside of the hollow membrane filament 3 to form purified water. The purified water is collected in the second chamber 14 through the inside of the hollow membrane filament and finally output through the second port 12.

[0093] As a feasible option, such as Figure 3 As shown, the filtration device may include a flow guide 5 disposed in the first chamber 13. The flow guide 5 causes water input from the first port 11 into the first chamber 13 to rotate in a first predetermined direction around the axis of the housing mechanism 1. In this manner, water input from the first port 11 into the first chamber 13 rotates in the first predetermined direction around the axis of the housing mechanism 1 when passing through the flow guide 5. This causes the water accumulated in the first chamber 13 to also rotate in the first predetermined direction around the axis of the housing mechanism 1. The rotating water flow enhances the rinsing effect on the outer surface of the hollow membrane filaments 3, further causing impurities deposited on the outer surface of the hollow membrane filaments 3 to detach from the hollow membrane filaments 3 along with the water.

[0094] Furthermore, such as Figure 3 As shown, the flow guide 5 can be sleeved outside the partition mechanism 2. The flow guide 5 divides the first chamber 13 into a first chamber first part 131 and a first chamber second part 132 located below the first chamber first part 131. The first chamber first part 131 is connected to the first port 11. Figure 6 This is a schematic diagram of the flow guide component of the filter device in an embodiment of this utility model. Figure 7 This is a partial cross-sectional schematic diagram of the flow guide component of the filter device in an embodiment of this utility model, as shown below. Figure 6 and Figure 7As shown, the flow guide 5 has a plurality of circumferentially distributed flow guide openings 51, which are in communication with the first chamber first portion 131 and the first chamber second portion 132. The flow guide openings 51 have an inclination angle, so that the water inputted into the first chamber second portion 132 generates a rotation around the axis of the housing mechanism 1 in a first preset direction. In the circumferential direction of the axis of the housing mechanism 1, the direction of the water flow outputted by the flow guide openings 51 has an included angle with the axis of the housing mechanism 1, which is greater than 0 degrees and less than 90 degrees. As a possibility, the outer side wall of the flow guide 5 and the inner side wall of the housing mechanism 1 can be in a sealed state, so that the water in the first chamber first portion 131 must pass through the flow guide openings 51 before entering the first chamber second portion 132, so as to increase the rotation effect of the water entering the first chamber second portion 132, and avoid the water in the first chamber first portion 131 leaking into the first chamber second portion 132 from the gap between the outer side wall of the flow guide 5 and the inner side wall of the housing mechanism 1.

[0095] As a possibility, as shown in Figures 1 to 3 As shown, the filter device can include a water inlet pipe 6 penetrating through the separation mechanism 2, and the water outlet openings 61 are arranged on the side wall of the water inlet pipe 6 in the first chamber 13. The water inlet pipe 6 and the separation mechanism 2 are in a sealed state, for example, the water inlet pipe 6 can have a sealing groove, and a sealing ring is arranged in the sealing groove. A plurality of hollow membrane filaments 3 are arranged in the circumferential direction of the water inlet pipe 6. The water inlet pipe 6 is used to input raw water into the first chamber 13 in the water purification mode, so as to increase the water inflow into the first chamber 13; and the water inlet pipe 6 is used to input water into the first chamber 13 in the backwashing mode, so as to wash the outer surface of the hollow membrane filaments 3. Since the water inlet pipe 6 can be located in the middle of the plurality of hollow membrane filaments 3, when the water is sprayed from the water outlet openings 61 of the side wall of the water inlet pipe 6, the middle of the plurality of hollow membrane filaments 3 can be washed from one side of the middle of the plurality of hollow membrane filaments 3, so as to improve the washing effect of the hollow membrane filaments 3. Further, Figure 4 is a structural schematic view of the water inlet pipe of the filter device in the embodiment of the utility model, Figure 5 is Figure 4 is a sectional view at A-A, as shown in Figure 4 and Figure 5 As shown, the water outlet openings 61 can be oriented so that the outputted water rotates around the axis of the water inlet pipe 6, and the rotation of the water flow at the middle of the plurality of hollow membrane filaments 3 can improve the washing effect. Further, the water outlet openings 61 can make the outputted water rotate around the axis of the water inlet pipe 6 in a second preset direction, and the first preset direction can be the same as the second preset direction. In this way, the water accumulated in the first chamber 13 can be further forced to rotate around the axis of the housing mechanism 1, and the speed of the rotation can be further improved, so as to increase the washing intensity on the outer side of the hollow membrane filaments 3 and improve the washing effect.

[0096] When the backwash mode has the first stage and the second stage when the backwash is not in synchronization, in the first stage, the water inlet end 41 inputs water, the gas inlet end 42 inputs gas, and the gas-liquid mixing unit 4 sends the gas-liquid mixture formed to the inside of the hollow membrane wire 3 through the second chamber 14; in the second stage, water can be input to the first chamber 13 through the water inlet pipe 6, and / or water can be input to the first chamber 13 through the first port 11.

[0097] In a specific embodiment, as shown in Figure 5 The extension direction of the water outlet 61 can be tangent to the inner side wall of the water inlet pipe 6, so that the water output by the water outlet 61 rotates around the axis of the water inlet pipe 6.

[0098] In the above embodiment, the water outlet 61 can be multiple. As shown in Figure 4 The multiple water outlets 61 are arranged in the axial direction of the water inlet pipe 6 and / or distributed around the circumference of the water inlet pipe 6. Through the above structure, the water inlet pipe 6 can wash the hollow membrane wire 3 at different positions in the vertical direction, and in addition, the water flowing out of the water outlet 61 can wash the hollow membrane wire 3 at different positions in the circumferential direction. The lowermost water outlet 61 on the water inlet pipe 6 can reach the vicinity of the lowermost end of the hollow membrane wire 3, ensuring that the entire hollow membrane wire 3 can be washed.

[0099] As a possibility, as shown in Figure 3 The first chamber 13 can be provided with a limiting plate 102 for limiting the axial and / or radial position of the water inlet pipe 6. The outer side wall of the limiting plate 102 can abut against the inner side wall of the shell mechanism 1 in the circumferential direction, thereby achieving the positioning of the limiting plate 102 in the radial and axial directions. The lower end of the water inlet pipe 6 is connected to the limiting plate 102. For example, the lower end of the water inlet pipe 6 can be inserted into the upwardly protruding plug-in part of the limiting part, thereby achieving the axial and radial limiting of the water inlet pipe 6. Through the above way, the water inlet pipe 6 cannot move downwardly and fall to block the blow-off port 15, and cannot shake in the circumferential direction. Further, the limiting plate 102 has a hollow structure, and there is a spacing gap between the limiting plate 102 and the bottom wall of the shell mechanism 1. When it is necessary to discharge the water in the first chamber 13, the water can flow to the blow-off port 15 through the spacing gap and the hollow structure. The bottom wall of the shell mechanism 1 has a recessed part 18, and the shell mechanism 1 has the blow-off port 15 located at the bottom of the recessed part 18, so that the water and impurities in the water in the first chamber 13 can first gather in the recessed part 18, and then be discharged through the blow-off port 15, so that the water and impurities in the first chamber 13 can be discharged.

[0100] As a possibility, as shown in Figure 1 and Figure 2As shown, the filter device can comprise: a water inlet channel 7, the water inlet channel 7 is used to connect with a water source, for example tap water. The water inlet channel 7 can be in communication with the first port 11, the inlet of the water inlet pipe 6, and the water inlet end 41 of the gas-liquid mixing unit 4. Through the above structure, the water inlet channel 7 realizes water supply to the first port 11, the inlet of the water inlet pipe 6, and the water inlet end 41 of the gas-liquid mixing unit 4. Further, the water inlet channel 7 and the water inlet end 41 of the gas-liquid mixing unit 4 have a first control valve unit 8 capable of controlling the on-off. In the backwashing mode, when it is needed to make the water inlet end 41 of the gas-liquid mixing unit 4 inlet water, the water inlet channel 7 is communicated with the water inlet end 41 of the gas-liquid mixing unit 4 through the first control valve unit 8. In the backwashing mode, if the backwashing mode has a first stage and a second stage, in order to control the first stage and the second stage to be alternately performed, the first port 11, the inlet of the water inlet pipe 6, and the water inlet channel 7 can be in communication. For example, the water inlet channel 7 and the first port 11, the inlet of the water inlet pipe 6 can have a third control valve unit.

[0101] As shown in Figure 1 and Figure 2 As shown, the filter device can comprise: a water outlet channel 9, the water outlet channel 9 is communicated with the second port 12 through a second control valve unit 10 capable of controlling the on-off. In the water purification mode, the second control valve unit 10 is in the communication state to make the water outlet channel 9 communicated with the second port 12, and the purified water output by the second port 12 is output through the water outlet channel 9 for the user to use. In the backwashing mode, the second control valve unit 10 is in the off state to make the water outlet channel 9 disconnected with the second port 12, so that the gas-liquid mixture formed by the gas-liquid mixing unit 4 can be prevented from flowing into the water outlet channel 9. As a possibility, the outlet of the gas-liquid mixing unit 4 can be communicated with the second port 12 through a one-way valve 101, thereby being communicated with the second chamber 14. The one-way valve 101 can be conducted by the outlet of the gas-liquid mixing unit 4 to the second port 12. Through the one-way valve 101, the purified water output by the second port 12 can be prevented from flowing into the gas-liquid mixing unit 4 in the water purification mode.

[0102] As a possibility, the conversion joint 17 can have a third port. The third port is used to communicate with the water inlet channel 7. The inlet of the water inlet pipe 6 is installed in cooperation with the conversion joint 17 to make the inlet of the water inlet pipe 6 communicated with the third port. For example, the water inlet pipe 6 can be installed in cooperation with the conversion joint 17 in a plug-in manner.

[0103] As feasible, the hollow membrane filaments 3 on the partition mechanism 2 are divided into multiple areas, and the hollow membrane filaments 3 corresponding to each area in the first chamber 13 are provided with a mesh bag for sleeving, so that the hollow membrane filaments 3 corresponding to different areas are separated. In this way, the hollow membrane filaments 3 in each area will not be entangled with the hollow membrane filaments 3 in the remaining areas, and the damage caused by the collision of the hollow membrane filaments 3 in different areas caused by the swinging of the hollow membrane filaments 3 due to the rotation of the water in the first chamber 13 is also reduced, which is beneficial to improve the service life of the hollow membrane filaments 3.

[0104] A control method of the filter device is also proposed in the present application. The control method can be applied to any of the above filter devices or other feasible filter devices. The control method can include the following steps:

[0105] S100: Water and gas are respectively input into the water inlet end 41 and the gas inlet end 42 of the gas-liquid mixing unit 4 to form a gas-liquid mixture with micro-bubbles, and the gas-liquid mixture is input into the second chamber 14, so that the gas-liquid mixture flows out from the outside of the hollow membrane filaments 3 from the inside of the hollow membrane filaments 3.

[0106] In the above steps, the first control valve unit 8 can be controlled to communicate the water inlet waterway 7 with the water inlet end 41 of the gas-liquid mixing unit 4, and the second control valve unit 10 can be controlled to disconnect the second port 12 from the clean water output waterway 9, so that the water in the water inlet waterway 7 can enter the gas-liquid mixing unit 4 to form a gas-liquid mixture, and the gas-liquid mixture is input into the second chamber 14, preventing the gas-liquid mixture from entering the clean water output waterway 9 and being supplied to the user.

[0107] Through the above steps, the impurities deposited in the micro-pores on the outside of the hollow membrane filaments 3 can be effectively cleaned, so that the recovery rate of the membrane flux of the hollow membrane filaments 3 is effectively improved, the fouling condition of the hollow membrane filaments 3 is effectively reversed, and the clean water effect of the filter device can still be maintained at a high level, meeting the needs of the user, thereby reducing the economic burden and equipment maintenance cost of the user.

[0108] The control method can further include the following steps:

[0109] S200: Water is input into the first chamber 13 to flush the outside of the hollow membrane filaments 3.

[0110] Through the above steps, the impurities deposited in the micro-pores of the hollow membrane filaments 3 and the impurities on the outer surface of the hollow membrane filaments 3 that are flushed to the outer surface of the hollow membrane filaments 3 can be flushed away from the outer surface of the hollow membrane filaments 3 and enter the water in the first chamber 13, which is convenient for later discharge from the filter device.

[0111] In the above steps, the water can be input into the first chamber 13 through the first port 11, or the water can be input into the first chamber 13 through the water inlet pipe 6, or the water can be input into the first chamber 13 through the first port 11 and the water inlet pipe 6 at the same time, so as to improve the water flow of the input water.

[0112] In the above two steps, in an available embodiment, the step S100 can be executed synchronously with the step S200. In an available embodiment, the step S200 can be executed after the step S100, or the step S100 and the step S200 can be executed alternately.

[0113] The control method can further include the following steps:

[0114] S300: input the water into the first chamber 13 through the first port 11 and the water inlet pipe 6 respectively, so that the water in the first chamber 13 flows out from the inside of the hollow membrane filament 3 to the outside of the hollow membrane filament 3 through the hollow membrane filament 3 to form the purified water, and the purified water is collected by the second chamber 14 and then output by the second port 12.

[0115] Through the above steps, the filtering device can filter the input water with large flow to form purified water and output to the outside, so as to achieve the purpose of improving the water flux.

[0116] In the above steps, the first control valve unit 8 can be controlled to disconnect the water inlet waterway 7 and the water inlet end 41 of the gas-liquid mixing unit 4, and the second control valve unit 10 can be controlled to connect the second port 12 and the purified water output waterway 9, so as to avoid the raw water to be filtered entering the gas-liquid mixing unit 4 to form a gas-liquid mixture and entering the purified water output waterway 9 to supply the user.

[0117] All articles and references disclosed, including patents and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of to describe a combination shall include the elements, ingredients, components or steps identified, and such other elements ingredients, components or steps that do not materially affect the basic and novel characteristics of the combination. The use of the term "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein also is taken to mean that "consisting essentially of is also contemplated. By using the term "may" herein, it is intended that any property so described can or can not be present. Multiple elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step might be divided into separate multiple elements, ingredients, components or steps. To "comprise" or "comprising", "containing" or "containing", "have" or "having", "include" or "including" and the like are specifically intended to be open ended. These terms encompass the elements, ingredients, components or steps disclosed and any one or more additional elements, ingredients, components or steps.

[0118] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between various embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable persons skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A filter device, characterized in that The filter device comprises: a housing mechanism having a first port and a second port; a partition mechanism partitioning an inner portion of the housing mechanism into a first chamber and a second chamber, the first chamber being in communication with the first port, and the second chamber being in communication with the second port; a hollow membrane filament penetrating the partition mechanism, an inner side of the hollow membrane filament being in communication with the second chamber, and an outer side of the hollow membrane filament being in communication with the first chamber; a gas-liquid mixing unit having a water inlet end and a gas inlet end, an outlet of the gas-liquid mixing unit being in communication with the second chamber.

2. The filter device of claim 1, wherein, The filter device has a backwashing mode, in which the water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs a gas-liquid mixture to the inner side of the hollow membrane filament through the second chamber.

3. The filter device of claim 2, wherein, In the backwashing mode, the first port inputs water to the first chamber.

4. The filter device of claim 3, wherein, The water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs a gas-liquid mixture to the inner side of the hollow membrane filament through the second chamber, which is synchronized with the first port inputting water to the first chamber.

5. The filter device of claim 3, wherein, The backwashing mode has a first stage and a second stage, in the first stage, the water inlet end inputs water, the gas inlet end inputs gas, and the gas-liquid mixing unit outputs a gas-liquid mixture to the inner side of the hollow membrane filament through the second chamber; in the second stage, the first port inputs water to the first chamber.

6. The filter device of claim 5, wherein, The first stage and the second stage are alternately performed.

7. The filter device of claim 2, wherein, The housing mechanism has a blowdown port, which can be switched on and off.

8. The filter device of claim 7, wherein, In the backwashing mode, the blowdown port is in a communication state to discharge sewage in the first chamber.

9. The filter device of claim 1, wherein, The outlet of the gas-liquid mixing unit is in communication with the second port, thereby being in communication with the second chamber.

10. The filter device of claim 1, wherein, The gas-liquid mixing unit is located in the second chamber.

11. The filter device of claim 1, wherein, The gas-liquid mixing unit comprises a Venturi unit, a throat of the Venturi unit having the gas inlet end.

12. The filter device of claim 1, wherein, The filter device has a water purification mode, in which the first port inputs raw water, and the second port outputs purified water.

13. The filter device of claim 1, wherein, The filter device comprises: a flow guide arranged in the first chamber, the flow guide causing water input from the first port into the first chamber to rotate in a first preset direction around an axis of the housing mechanism.

14. The filter device of claim 1 or 13, wherein, The filter device comprises: a water inlet pipe penetrating the partition mechanism, a side wall of the water inlet pipe in the first chamber having a water outlet.

15. The filter device of claim 14, wherein, The water outlet enables the output water to rotate in a second preset direction around an axis of the water inlet pipe.

16. The filter device of claim 15, wherein, The first preset direction is the same as the second preset direction.

17. The filter device of claim 14, wherein, The filter device has a backwashing mode, in which the water inlet pipe inputs water to the first chamber.

18. The filter device of claim 14, wherein, The filter device has a water purification mode, in which the water inlet pipe inputs water to the first chamber.

19. The filter device of claim 13, wherein, The flow guide is sleeved outside the separation mechanism, and the flow guide divides the first chamber into a first chamber first part and a first chamber second part below the first chamber first part, and the first chamber first part communicates with the first port; the flow guide has a plurality of circumferentially distributed flow guide ports, and the flow guide ports communicate the first chamber first part and the first chamber second part; the flow guide ports have an inclination angle to make the water input into the first chamber second part rotate in a first preset direction around the axis of the shell mechanism.

20. The filter device of claim 19, wherein, The outer side wall of the flow guide is in a sealed state with the inner side wall of the shell mechanism.

21. The filter device of claim 14, wherein, The filter device comprises: The water inlet channel can communicate with the first port, the inlet of the water inlet pipe, and the water inlet end of the gas-liquid mixing unit.

22. The filter device of claim 21, wherein, The water inlet channel and the water inlet end of the gas-liquid mixing unit have a first control valve unit capable of controlling the on-off.

23. The filter device of claim 14, wherein, The water outlet is a plurality of water outlets arranged along the axial direction of the water inlet pipe and / or distributed around the circumference of the water inlet pipe.

24. The filter device of claim 1, wherein, The filter device comprises: The clean water output water channel communicates with the second port through a second control valve unit capable of controlling the on-off.

25. The filter device of claim 24, wherein, The outlet of the gas-liquid mixing unit communicates with the second port through a one-way valve, thereby communicating with the second chamber; the one-way valve can be conducted to the second port from the outlet of the gas-liquid mixing unit.

26. The filter device of claim 1, wherein, The separation mechanism comprises: The hollow membrane wire is arranged in the fixing member; The water outlet end cover forms the second chamber with the fixing member, and the water outlet end cover has a water outlet communicating with the second port.

27. The filter device of claim 26, wherein, The shell mechanism comprises: The shell has an opening; The conversion joint provided at the opening has the first port and the second port; The water outlet of the water outlet end cover is installed in cooperation with the conversion joint to make the water outlet communicate with the second port.

28. The filter device of claim 27, wherein, The filter device comprises: The water inlet pipe is arranged on the separation mechanism, and the water inlet pipe has a water outlet on the side wall in the first chamber; The conversion joint has a third port for communicating with the water inlet channel, and the inlet of the water inlet pipe is installed in cooperation with the conversion joint to make the inlet of the water inlet pipe communicate with the third port.

29. The filter device of claim 7, wherein, The blowdown port is located at the bottom wall of the shell mechanism, and the bottom wall has an upward trend around the blowdown port.

30. The filter device of claim 14, wherein, The first chamber is provided with a limiting plate for axially and / or radially limiting the water inlet pipe, the outer side wall of the limiting plate abuts against the inner side wall of the shell mechanism, and the lower end of the water inlet pipe is connected with the limiting plate.

31. The filter device of claim 30, wherein, The limiting plate has a hollow structure, and the limiting plate and the bottom wall of the shell mechanism have a spacing gap; the bottom wall of the shell mechanism has a recess, and the shell mechanism has a blowdown port located at the bottom of the recess.

32. The filter device of claim 1, wherein, The hollow membrane filaments on the separation mechanism are divided into multiple regions, and the hollow membrane filaments corresponding to each region are provided with a mesh bag for sleeving, so that the hollow membrane filaments corresponding to different regions are separated.

33. The filter device of claim 14, wherein, The extension direction of the water outlet is tangent to the inner side wall of the water inlet pipe.

34. The filter device of claim 7, wherein, The filter device comprises: A blowdown pipeline in communication with the blowdown port, wherein a switch valve is arranged on the blowdown pipeline, so that the blowdown port can be switched on and off.

35. The filter device of claim 1, wherein, The hollow membrane filaments comprise ultrafiltration membrane filaments.

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