CN218653891U - Filtering module and water purifying device - Google Patents

Abstract

The utility model discloses a filter module and purifier. The filter module comprises a central tube, a filter membrane, a circumferential surface, a first end surface and a second end surface. Through setting up first water inlet at the periphery, first terminal surface sets up the second water inlet, the second terminal surface sets up first delivery port, filter membrane coils and makes and form multilayer rete in the center tube, and be formed with the clearance between the adjacent rete, the variation in size in adjacent clearance, the former water is through the leading-in module of filtering of first water inlet and second water inlet, generate pure water and dense water, the pure water passes through the center tube and derives, dense water flows to first delivery port through a plurality of clearances, the dense water export has been dispersed, thereby the flow path of former water has been prolonged, increase the inside rivers disturbance of filter module, the risk of filter membrane scale deposit has been reduced, the life and the desalination of filter module have been promoted simultaneously.

Description

Filtering module and water purifying device

Technical Field

The utility model relates to a filter technical field, especially relate to a filter module and purifier.

Background

The traditional common membrane module adopts a flow channel mode that the circumferential surface is fully sealed, raw water enters from one end surface, concentrated water exits from the other end surface and pure water exits from a central pipe, the raw water flows in the membrane module along the direction of the central pipe, the path is short (the net membrane width of the membrane module is long) and the water flow is stable, a wide scaling area is easily formed on the long edge of a membrane which is vertical to the central pipe and located on the water outlet side, and the whole service life and the desalination rate of the membrane module are poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a filter module and purifier.

The utility model provides a filter module, include:

a central tube;

the filter membrane is rolled on the central pipe to form a plurality of layers of membrane layers, a gap is formed between every two adjacent membrane layers, and the sizes of the adjacent gaps are different;

the circumferential surface is wound on the surface of the filter membrane and comprises a first water inlet;

the first end face is positioned at one end of the filtering membrane, and a second water inlet is formed in the first end face;

the second end face is positioned at one end, far away from the first end face, of the filtering membrane, a first water outlet is formed in the second end face, and at least part of the gap is arranged opposite to the first water outlet.

The utility model discloses a set up first water inlet at the periphery, first terminal surface sets up the second water inlet, the second terminal surface sets up first delivery port, it forms the multilayer rete to roll up the system in the center tube to filter the diaphragm, and be formed with the clearance between the adjacent rete, the raw water passes through first water inlet and the leading-in filtration module of second water inlet, generate pure water and dense water, the pure water is derived through the center tube, dense water passes through the first delivery port of a plurality of clearance flow directions, the dense water export has been dispersed, thereby the flow path of raw water has been prolonged, increase the inside rivers disturbance of filtration module, the risk of filtering the diaphragm scale deposit has been reduced, the life and the desalination of filtering the module have been promoted simultaneously.

In certain embodiments, the second water inlet is located on a side of the first end face that is proximal to the center tube, the first end face further comprising a third water inlet located on a side of the second water inlet that is distal from the center tube.

In some embodiments, the opening length of the second water inlet is smaller than the opening length of the third water inlet.

In some embodiments, the ratio of the opening length of the third water inlet to the length of the expanded area of the filter membrane on the side of the first end face ranges from 1% to 80%.

In some embodiments, the ratio of the opening length of the third water inlet to the length of the spread surface of the filter membrane on the side of the first end surface ranges from 1% to 35%.

In certain embodiments, the second end face further comprises:

a second water outlet comprising a first sidewall and a second sidewall;

the third water inlet comprises a third side wall and a fourth side wall, and an included angle between the direction of the sum of the water velocity vector of the third water inlet and the water velocity vector of the first water inlet and the first end surface is not smaller than an included angle between a connecting line of the fourth side wall and the first end surface, and is not larger than an included angle between a connecting line of the third side wall and the second side wall and the first end surface.

In certain embodiments, the third water intake port comprises a plurality of third water intake ports, and the plurality of third water intake ports are symmetrically arranged.

In some embodiments, the first end surface is circular, and the plurality of third water inlet ports are arranged circumferentially along the central tube.

In some embodiments, the first water inlet includes a plurality of first water inlets arranged in an array along a first direction and a second direction, respectively.

In certain embodiments, the filtration membrane comprises one of a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, and a microfiltration membrane.

In certain embodiments, the first end face and the second end face are made of a plastic material.

The utility model provides a water purifying device, which comprises the filtering module.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a filtering module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a circumferential surface according to an embodiment of the present invention;

fig. 3 is a further schematic view of the circumferential surface of an embodiment of the present invention;

fig. 4 is a schematic structural view of a second end face of an embodiment of the present invention;

fig. 5 is a schematic view of another structure of the filtering module according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a first end face of the embodiment of the present invention;

fig. 7 is a schematic illustration of the water inlet mode of the filtering module according to the embodiment of the present invention;

fig. 8 is a schematic view of another structure of the filter module according to the embodiment of the present invention;

fig. 9 is another schematic structural view of the second end face according to the embodiment of the present invention;

fig. 10 is yet another schematic structural view of the second end face of the embodiment of the present invention;

fig. 11 is a schematic structural view of a water purification apparatus according to an embodiment of the present application.

Description of the main element symbols:

the water purifying device 1000, the filter module 100, the central tube 10, the pure water inlet 11, the pure water outlet 12, the filter membrane 20, the gap 21, the circumferential surface 30, the first water inlet 31, the first end surface 40, the second water inlet 41, the third water inlet 42, the third side wall 421, the fourth side wall 422, the second end surface 50, the first water outlet 51, the second water outlet 52, the first side wall 521, and the second side wall 522.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The membrane component is a common device in the field of fluid separation, and can be used for removing one or more substances in fluid by utilizing the separation characteristic of the membrane component so as to achieve the purposes of purification, concentration, purification and the like. However, the fluid flows in the membrane module more stably, inorganic and organic pollutants in the fluid are easy to deposit on the surface of the membrane or on the components in the membrane, so that scaling blockage or organic pollution is caused, the treatment effect and the service life of the membrane module are affected, and the increasingly improved filtration requirement is difficult to meet.

In view of the above, referring to fig. 1-4, the present invention provides a filter module 100, the filter module 100 includes a central tube 10, a filter membrane, a circumferential surface 30, a first end surface 40 and a second end surface 50. The filtering membrane 20 is rolled on the central tube 10 to form a plurality of membrane layers, a gap 21 is formed between adjacent membrane layers, the size of the adjacent gap 21 is different, the circumferential surface 30 is wound on the surface of the filtering membrane 20, the circumferential surface 30 comprises a first water inlet 31, the first end surface 40 is positioned at one end of the filtering membrane 20, the first end surface 40 is provided with a second water inlet 41, the second end surface 50 is positioned at one end of the filtering membrane 20 far away from the first end surface 40, the second end surface 50 is provided with a first water outlet 51, and at least part of the gap 21 is opposite to the first water outlet 51.

Specifically, filter module 100 can be regular or irregular bodies such as cylinder, cuboid, the utility model discloses filter module 100 example with the cylinder, filter module 100 is used for separating into pure water and dense water with the raw water.

The plurality of filter membranes 20 may be a plurality of sheets, and the plurality of sheets of filter membranes 20 are wound around the central tube 10, so that a plurality of layers of membranes can be formed, and the desalination rate of the filter module 100 is improved by jointly treating raw water with the plurality of layers of membranes. The system of rolling up of many pages of filtration membrane 20 is formed with clearance 21, promptly, is formed with clearance 21 between the adjacent rete, and the size difference of adjacent clearance 21, for example, along center tube 10 to periphery 30's direction, clearance 21 is array setting in proper order according to big or small order, and clearance 21 department can be provided with into water graticule mesh, and the graticule mesh of intaking is used for raw water to lead in, and raw water passes through the graticule mesh of intaking and gets into filtration module 100 to filter raw water by the rete, form pure water and dense water. The filter membrane 20 may be rolled into a regular or irregular cylindrical structure having a cylindrical shape, a prismatic shape, or the like. The filter membrane 20 may be one of flat membrane type membranes such as a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, and a microfiltration membrane, for example, in the case of a reverse osmosis membrane, raw water is filtered by the reverse osmosis membrane, and pure water that can enter the central tube 10 through the reverse osmosis membrane, and concentrated water that cannot pass through the reverse osmosis membrane is concentrated water, and the concentrated water is discharged through the first water outlet 51.

The center tube 10 may be a cylindrical hollow tube or a rectangular hollow tube, and is not particularly limited herein, and the present invention is exemplified by a cylindrical hollow tube. The central tube 10 includes a plurality of pure water inlets 11 and pure water outlets 12, and pure water obtained by processing by the filtering membrane 20 enters the central tube 10 through the plurality of pure water inlets 11 and is guided out of the filtering module 100 through the pure water outlets 12.

The circumferential surface 30 is a planar body formed by winding the sealing material around the outer surface of the filter membrane 20, and the circumferential surface 30 may be made of a plastic material, that is, the circumferential surface 30 is disposed around the first end surface 40 and the second end surface 50. The circumferential surface 30 is provided with a first water inlet 31, and the first water inlet 31 is used for introducing raw water. The first water inlet 31 may be a central full opening or a uniform opening and is sealed by a blue tape, that is, the first water inlet 31 may be one or a plurality of, for example, referring to fig. 3, in case that the first water inlet 31 is a plurality, the plurality of first water inlets 31 are arranged in an array along a first direction and a second direction. It should be noted that the first direction is a direction parallel to the center pipe 10, and the second direction is perpendicular to the first direction, that is, the second direction is a direction perpendicular to the center pipe 10.

The first end 40 may be made of plastic or other waterproof material and sealed with glue or other means. The first end surface 40 is disposed at one end of the filter membrane 20, the first end surface 40 includes a second water inlet 41, the second water inlet 41 is a raw water inlet, and the second water inlet 41 can be fully opened.

The second end 50 may be made of plastic or other waterproof material and sealed with glue or other means. The second end face 50 is disposed at an end of the filtering membrane 20 far from the first end face 40, the second end face 50 includes a first water outlet 51, the first water outlet 51 and the gap 21 can be used for leading out the concentrated water, that is, at least a part of the gap 21 is connected to the first water outlet 51, in this embodiment, the raw water enters the filtering module 100 through the gap 21, the pure water and the concentrated water are generated under the action of the filtering membrane 20, and the concentrated water flows to the first water outlet 51 through the gap 21, so that the concentrated water is led out of the filtering module 100.

In some examples, the thickness between adjacent membrane layers gradually increases in the direction from the base pipe 10 to the circumferential surface 30, and the gaps 21 between adjacent membrane layers gradually decrease, i.e., the thickness of the water inlet grid gradually decreases. In specific implementation, raw water enters the filter module 100 through the first water inlet 31 and the second water inlet 41, a small amount of concentrated water can flow to the first water outlet 51 through the gap 21 far away from the central tube 10, and most of raw water is concentrated to the gap 21 close to the central tube 10 and flows to the first water outlet 51, so that the concentrated water can be dispersed and guided out, the flow path of the raw water is prolonged to be close to the central tube 10, and the desalination rate of the filter module 100 is improved.

The utility model discloses a set up first water inlet 31 at periphery 30, first terminal surface 40 sets up second water inlet 41, second terminal surface 50 sets up first delivery port 51, filter membrane 20 rolls up and makes and form the multilayer rete in center tube 10, and be formed with gapped 21 between the adjacent rete, the raw water is through leading-in filtration module 100 of first water inlet 31 and second water inlet 41, generate pure water and dense water, the pure water is derived through center tube 10, dense water is through the first delivery port 51 of a plurality of 21 flow direction in clearance, the export of dense water has been dispersed, thereby the flow path of raw water has been prolonged, increase the inside rivers disturbance of filtration module 100, the risk of 20 scale deposits of filter membrane has been reduced, the life and the desalination of filtration module 100 have been promoted simultaneously.

Referring to fig. 5 and 6, in some embodiments, the second water inlet 41 is located on a side of the first end surface 40 close to the central tube 10, the first end surface 40 further includes a third water inlet 42, and the third water inlet 42 is located on a side of the second water inlet 41 far from the central tube 10.

Specifically, the second water inlet 41 is disposed on a side of the first end surface 40 close to the central tube 10, that is, the second water inlet 41 and the first water outlet 51 are disposed opposite to each other. The third water inlet 42 is disposed on a side of the first end surface 40 away from the central tube 10, that is, the third water inlet 42 and the first water outlet 51 are disposed diagonally.

The second water inlet 41 and the third water inlet 42 may be disposed in a circular ring shape, and the opening length of the second water inlet 41 is smaller than the opening length of the third water inlet 42. Raw water enters the filtering module 100 through the second water inlet 41, so that the water flow speed around the central pipe 10 can be increased, the dead water area around the central pipe 10 is improved, and the scaling risk is reduced. The raw water enters the filter module 100 through the third water inlet 42 and the first water inlet 31, that is, the raw water flow velocity V1 parallel to the central pipe 10 and the raw water flow velocity V2 perpendicular to the center are vector-added and flow toward the first water outlet 51.

It should be noted that the ratio of the opening length of the third water inlet 42 to the length of the expanded surface of the filter membrane 20 on the side of the first end surface 40 may range from 1% to 80%, and in some embodiments, the opening length of the third water inlet 42 may further decrease to 1% to 35%.

So, through setting up second water inlet 41 in first terminal surface 40 and being close to center tube 10 one side, can increase the water velocity around the center tube 10, improve the stagnant water district around the center tube 10, reduce the scale deposit risk, through setting up third inlet 42 in first terminal surface 40 and keeping away from center tube 10 one side, the flow path of raw water can be prolonged, the export of dispersion dense water, increase the inside rivers disturbance of filtration module 100, the risk of filtering diaphragm 20 scale deposit has been reduced, the life and the desalination of filtration module 100 have been promoted simultaneously.

Referring to fig. 7, in some embodiments, the second end surface 50 further includes a second water outlet 52, and the second water outlet 52 includes a first sidewall 521 and a second sidewall 522. The third water inlet 42 comprises a third side wall 421 and a fourth side wall 422, and an included angle between the direction of the sum of the water velocity vector of the third water inlet 42 and the water velocity vector of the first water inlet 31 and the first end surface 40 is not less than an included angle between a connecting line of the fourth side wall 422 and the first side wall 521 and the first end surface 40, and is not more than an included angle between a connecting line of the third side wall 421 and the second side wall 522 and the first end surface 40.

Specifically, the second water outlet 52 is disposed on the second end surface 50 near one side of the central tube 10, the second water outlet 52 is disposed in a circular ring shape, and the second water outlet 52 is used for guiding out concentrated water. The raw water enters from the first water inlet 31 and the third water inlet 42 of the first end surface 40, and the water velocity vector sum a0 can be obtained from V1 and V2, where V1 is the water velocity parallel to the direction of the central tube 10 and V2 is the water velocity perpendicular to the direction of the central tube 10, that is, V1 is the water velocity of the third water inlet 42 and V2 is the water velocity of the first water inlet 31.

The first side wall 521 is disposed on the side of the second water outlet 52 close to the central tube 10, the second side wall 522 is disposed on the side of the second water outlet 52 close to the circumferential surface 30, the third side wall 421 is disposed on the side of the third water inlet 42 close to the central tube 10, and the fourth side wall 422 is disposed on the side of the third water inlet 42 close to the circumferential surface 30. An included angle between a connecting line of the third sidewall 421 and the second sidewall 522 and the first end surface 40 is defined as a1, and an included angle between a connecting line of the fourth sidewall 422 and the first sidewall 521 and the first end surface 40 is defined as a2.

Wherein a1 is greater than a2, and when a0 is greater than a1 or a0 is less than a2, the water in the filter module 100 flows to the second end surface 50 or the central tube 10, and the water flow loss is large. Under the condition that a2 is more than or equal to a0 and less than or equal to a1, the water inside the filtering module 100 flows to the second water outlet 52, and the water flow loss is small. D0 is the width of the first end surface 40 and the second end surface 50, D1 is the width of the second water outlet 52, D2 is the width of the third water inlet 42, B1 is the width of the circumferential surface 30 connecting the first end surface 40, B3 is the width of the first water inlet 31, and B2 is the width of the circumferential surface 30 connecting the second end surface 50. Calculating according to the included angle:

it should be noted that during the filtration process, the water flow Q around the filtration module 100 is approximately the same, Q = S × V (S is the water inlet area, and V is the water flow velocity), that is, the water inlet area and the water flow velocity are inversely proportional. The width of the third water inlet 42 is D2, the width of the first water inlet 31 is B3, the thickness of the gap between two adjacent filter membranes 20 is D, the number of the filter membranes 20 is a, the water inlet area S1= a × D2 × D of the third water inlet 42 can be obtained, the water inlet area S2= a × B3 × D of the first water inlet 31 is obtained, S1 is inversely proportional to V1, and S2 is inversely proportional to V2.

So, through the cooperation size of adjustment first water inlet 31 and third water inlet 42, make filter module 100 satisfy a2 and be less than or equal to a0 and be less than or equal to a1, the leading-in raw water flow direction second delivery port 52 of first water inlet 31 and third water inlet 42 avoids raw water flow direction first lateral wall 521 and center tube 10 to reduce water flow loss, increased the inside rivers disturbance of filter module 100, reduced the risk of filtering diaphragm 20 scale deposit, promote the anti-attenuation of filter module 100.

Referring to fig. 8-10, in some embodiments, the third water inlet 42 includes a plurality of third water inlets 42, and the plurality of third water inlets 42 are symmetrically disposed.

Specifically, please refer to fig. 9, the third water inlets 42 are symmetrically disposed on two sides of the central tube 10, raw water can be introduced into the filtering module 100 through the third water inlets 42 on two sides of the central tube 10, and the third water inlets 42 can increase water flow disturbance inside the filtering module 100, thereby reducing a dead water area.

Referring to fig. 10, in some examples, a plurality of third water inlets 42 may be disposed along a circumferential direction of the central tube 10, for example, referring to fig. 10, the plurality of third water inlets 42 are disposed around the central tube 10, and raw water may be introduced into the filter module 100 through the plurality of third water inlets 42 around the central tube 10, so as to increase introduction of raw water, further increase water flow disturbance inside the filter module 100, and reduce a dead water zone.

It should be noted that the third water inlet 42 may be an elongated shape with a uniform width, or may be other regular or irregular shapes, and the width, number, and shape of the third water inlet 42 may be configured according to actual situations, and are not limited herein.

So, through setting up a plurality of third inlet 42, and a plurality of third inlet 42 symmetry sets up, can increase the inside rivers disturbance of filtration module 100, has reduced the risk of filtering diaphragm 20 scale deposit, has promoted the life and the desalination of filtering module 100 simultaneously.

Referring to fig. 11, the present invention further provides a water purifying apparatus 1000, wherein the water purifying apparatus 1000 includes a filtering module 100.

The utility model discloses a set up first water inlet 31 at periphery 30, first terminal surface 40 sets up second water inlet 41, second terminal surface 50 sets up first delivery port 51, filter membrane 20 rolls up and makes and form the multilayer rete in center tube 10, and be formed with gapped 21 between the adjacent rete, the raw water is through leading-in filtration module 100 of first water inlet 31 and second water inlet 41, generate pure water and dense water, the pure water is derived through center tube 10, dense water is through the first delivery port 51 of a plurality of 21 flow direction in clearance, the export of dense water has been dispersed, thereby the flow path of raw water has been prolonged, increase the inside rivers disturbance of filtration module 100, the risk of 20 scale deposits of filter membrane has been reduced, the life and the desalination of filtration module 100 have been promoted simultaneously.

The utility model discloses a set up second water inlet 41 in first terminal surface 40 and be close to center tube 10 one side, can increase the velocity of water around the center tube 10, improve the stagnant water district around the center tube 10, reduce the scale deposit risk, keep away from center tube 10 one side through setting up third inlet 42 in first terminal surface 40, the flow path of raw water can be prolonged, the export of dispersion dense water, increase the inside rivers disturbance of filtration module 100, the risk of filtering diaphragm 20 scale deposit has been reduced, the life and the desalination of filtration module 100 have been promoted simultaneously.

The utility model discloses a set up a plurality of third inlet 42, and a plurality of third inlet 42 symmetry sets up, can increase the inside rivers disturbance of filtration module 100, has reduced the risk of filtering diaphragm 20 scale deposit, has promoted the life and the desalination of filtering module 100 simultaneously.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A filtration module, comprising:

a central tube;

the filter membrane is rolled on the central pipe to form a plurality of layers of membrane layers, a gap is formed between every two adjacent membrane layers, and the sizes of the adjacent gaps are different;

the circumferential surface is wound on the surface of the filter membrane and comprises a first water inlet;

the first end face is positioned at one end of the filtering membrane, and a second water inlet is formed in the first end face;

the second end face is positioned at one end, far away from the first end face, of the filtering membrane, the second end face is provided with a first water outlet, and at least part of the gap is arranged opposite to the first water outlet.

2. The filtration module of claim 1 wherein the second water inlet is located on a side of the first end face that is proximal to the center tube, the first end face further comprising a third water inlet located on a side of the second water inlet that is distal to the center tube.

3. The filtration module of claim 2, wherein the opening length of the second water inlet is less than the opening length of the third water inlet.

4. The filtration module of claim 3, wherein the ratio of the opening length of the third water inlet to the length of the expanded web of the filter membrane on the side of the first end surface is in the range of 1% to 80%.

5. The filtration module of claim 4, wherein the ratio of the opening length of the third water inlet to the length of the expanded web of the filter membrane on the side of the first end surface is in the range of 1% to 35%.

6. The filtration module of any of claims 2-5 wherein the second end face further comprises:

a second water outlet comprising a first sidewall and a second sidewall;

the third water inlet comprises a third side wall and a fourth side wall, and an included angle between the direction of the sum of the water velocity vector of the third water inlet and the water velocity vector of the first water inlet and the first end surface is not smaller than an included angle between a connecting line of the fourth side wall and the first end surface, and is not larger than an included angle between a connecting line of the third side wall and the second side wall and the first end surface.

7. The filtration module of claim 2, wherein the third inlet comprises a plurality of inlets, and the plurality of inlets are symmetrically disposed.

8. The filtration module of claim 2, wherein the first end surface is circular and the plurality of third water inlets are circumferentially disposed along the central tube.

9. The filtration module of claim 1, wherein the first water inlet comprises a plurality of first water inlets, and the plurality of first water inlets are arranged in an array along a first direction and a second direction, respectively.

10. The filtration module of claim 1, wherein the filtration membrane comprises one of a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, and a microfiltration membrane.

11. The filtration module of claim 1 wherein said first and second end faces are made of a plastic material.

12. A water purification apparatus comprising a filtration module according to any one of claims 1 to 11.

Images