CN218653890U - Filtering module and water purifying device - Google Patents

Abstract

The utility model discloses a filter module and purifier. The filtering module comprises a central pipe, a filtering membrane, a first end face and a second end face, the filtering membrane is rolled on the central pipe, the first end face is located at one end of the filtering membrane, a first water inlet and a second water inlet are formed in the first end face, the second end face is located at one end, far away from the first end face, of the filtering membrane, a first water outlet is formed in the first end face, and the first water outlet is located between the first water inlet and the second water inlet along the projection of the first end face in the first direction. So, through setting up first water inlet and second water inlet at first terminal surface to set up first delivery port at the second terminal surface, can prolong the flow path of raw water, promote the desalination of filtering the module, can eliminate the first terminal surface of filtering the module simultaneously and be close to the dead water region of center tube and being close to the outer periphery, promote the anti attenuation ability of filtering the module.

Description

Filtering module and water purifying device

Technical Field

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

Background

In the related technology, the membrane module of the water purifier 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), water flow is stable, a wide scaling area is easily formed on the long edge of the 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 tube;

the first end face is positioned at one end of the filtering membrane, and a first water inlet and a second water inlet are 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 first end face, and the projection of the first water outlet on the first end face along the first direction is positioned between the first water inlet and the second water inlet.

So, through setting up first water inlet and second water inlet at first terminal surface to set up first delivery port at the second terminal surface, can prolong the flow path of raw water, promote the desalination of filtering the module, can eliminate the first terminal surface of filtering the module simultaneously and be close to the dead water region of center tube and being close to the outer periphery, promote the anti attenuation ability of filtering the module.

In some embodiments, a distance between a projection of the first water outlet on the first end surface in the first direction and the first water inlet is equal to a distance between a projection of the first water outlet on the first end surface in the first direction and the second water inlet.

In some embodiments, the width of the first water inlet is equal to the width of the second water inlet, and the width of the first water outlet is not greater than the sum of the widths of the first water inlet and the second water inlet and is not less than one third of the width of the first water outlet or the second water inlet.

In certain embodiments, the filtration module comprises a circumferential surface surrounding the filtration membrane, the circumferential surface being provided with an open area.

In some embodiments, a distance between the first water inlet and the central tube is smaller than a distance between the second water inlet and the central tube, and a distance between a projection of the first water outlet on the first end surface in the first direction and the first water inlet is smaller than a distance between a projection of the first water outlet on the first end surface in the first direction and the second water inlet.

In some embodiments, the first water outlet comprises a first side wall and a second side wall, the second side wall being located on a side of the first side wall remote from the central tube, the second water inlet comprises a third side wall and a fourth side wall, the third side wall being located on a side of the fourth side wall adjacent to the central tube;

the included angle between the direction of the sum of the water velocity vector of the second water inlet and the water velocity vector of the opening area and the first end face is not less than the included angle between the connecting line of the fourth side wall and the first end face, and is not more than the included angle between the connecting line of the third side wall and the second side wall and the first end face.

In some embodiments, the opening area includes a plurality of opening areas, and the plurality of opening areas are arranged in an array along a first direction and a second direction.

In certain embodiments, the first end face further comprises a third water inlet located between the first water inlet and the second water inlet, and the second end face further comprises a second water outlet located on a side of the first water outlet facing away from the central tube.

In some embodiments, a projection of the first water outlet onto the first end surface along the first direction is located between the first water inlet and the third water inlet, and a projection of the second water outlet onto the first end surface along the first direction is located between the second water inlet and the third water inlet.

In certain embodiments, the first water inlet, the second water inlet, the third water inlet, the first water outlet, and the second water outlet are all annular.

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

In some 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 view of a water inlet manner of a filtering module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a second end face of an embodiment of the present invention;

fig. 3 is a schematic structural view of a first end face of an embodiment of the present invention;

fig. 4 is a schematic view of another water inlet manner of the filtering module according to the embodiment of the present invention;

FIG. 5 is a schematic view of the manner in which the circumferential surface is opened according to an embodiment of the present invention;

FIG. 6 is a schematic view of another opening pattern of the circumferential surface according to the embodiment of the present invention;

fig. 7 is another schematic structural view of the second end face according to the embodiment of the present invention;

fig. 8 is a schematic illustration of the water inlet mode of the filter module according to the embodiment of the present invention;

fig. 9 is a schematic view of another water inlet manner of the filtering module 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 still another schematic configuration diagram of the first end surface of the embodiment of the present invention;

fig. 12 is a schematic structural view of a water purification apparatus according to an embodiment of the present invention.

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 first end surface 30, the first water inlet 31, the second water inlet 32, the third side wall 321, the fourth side wall 322, the third water inlet 33, the second end surface 40, the first water outlet 41, the first side wall 411, the second side wall 412, the second water outlet 42, the circumferential surface 50 and the opening area 51.

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 by referring to the drawings are exemplary only for 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 of ordinary skill 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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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 invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves 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 the application of other processes and/or the use of other materials.

Please refer to fig. 1-3 together, the utility model provides a filter module 100, filter module 100 includes center tube 10, filter membrane 20, first terminal surface 30 and second terminal surface 40, filter membrane 20 rolls up and makes on center tube 10, first terminal surface 30 is located filter membrane 20's one end, first water inlet 31 and second water inlet 32 have been seted up to first terminal surface 30, second terminal surface 40 is located filter membrane 20 and keeps away from the one end of first terminal surface 30, first delivery port 41 has been seted up to first terminal surface 30, first delivery port 41 is located between first water inlet 31 and the second water inlet 32 along the projection of first direction at first terminal surface 30.

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 filtering 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, the filtering membrane 20 may be a plurality of sheets, the plurality of sheets of filtering membranes 20 are wound on the central tube 10, and the filtering membrane 20 may be wound to have a regular or irregular cylindrical structure such as a cylindrical shape, a prismatic shape, and the like. The raw water is treated by the filter membrane 20 to produce pure water and concentrated water, for example, in the case of a reverse osmosis membrane, the raw water is filtered by the reverse osmosis membrane, and the pure water can enter the central tube 10 through the reverse osmosis membrane, while the concentrated water cannot pass through the reverse osmosis membrane, and the concentrated water is discharged through the first water outlet 41.

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 first end 30 may be made of plastic or other waterproof material and sealed with glue or other means. First terminal surface 30 sets up in the one end of filtering membrane 20, and first terminal surface 30 includes first water inlet 31 and second water inlet 32, and first water inlet 31 and second water inlet 32 can be the ring form setting of circle, and the width of first water inlet 31 equals with the width of second water inlet 32, and the raw water gets into through first water inlet 31 and second water inlet 32 and filters module 100, and first water inlet 31 is close to the setting of center tube 10, and second water inlet 32 sets up in the one side of keeping away from center tube 10 farthest.

The second end 40 may be made of plastic or other waterproof material and sealed with glue or other means. The second end surface 40 is disposed at an end of the filter membrane 20 away from the first end surface 30, the second end surface 40 includes a first water outlet 41, the first water outlet 41 may be disposed in a circular ring shape, and the concentrated water produced by the filter membrane 20 is guided out of the filter module 100 through the first water outlet 41. The projection of the first water outlet 41 in the first direction at the first end face 30 is located between the first water inlet 31 and the second water inlet 32. It should be noted that the first direction is a direction parallel to the center tube 10.

Further, in some embodiments, the widths of the first water inlet 31, the second water inlet 32 and the first water outlet 41 may be set relatively, for example, the width of the first water outlet 41 is not greater than the sum of the widths of the first water inlet 31 and the second water inlet 32, and is not less than one third of the width of the first water inlet 31 or the second water inlet 32, compared to the case that the width of the first water outlet 41 is greater than the sum of the widths of the first water inlet 31 and the second water inlet 32, the present application increases the attenuation resistance of the filter module 100. Compare in the width of first delivery port 41 and be less than the one-third setting of first water inlet 31 or second water inlet 32 width, concentrated water concentration has been reduced to this application, has reduced the inside scale deposit risk of filtering module 100.

In specific implementation, raw water enters from the first water inlet 31 and the second water inlet 32 of the first end surface 30, that is, raw water enters from the side of the first end surface 30 close to the central tube 10 and the side farthest from the central tube 10, and the water flow intersection of the two sides can improve the salt rejection rate of the filtering membrane 20.

In this way, by providing the first water inlet 31 and the second water inlet 32 on the first end surface 30 and the first water outlet 41 on the second end surface 40, the flow path of the raw water can be extended, the desalination rate of the filter module 100 can be increased, the dead water region of the first end surface 30 of the filter module 100 near the central tube 10 and near the outer circumferential surface 50 can be eliminated, and the attenuation resistance of the filter module 100 can be improved.

Referring to fig. 1, in some embodiments, a distance between a projection of the first water outlet 41 on the first end surface 30 along the first direction and the first water inlet 31 is equal to a distance between a projection of the first water outlet 41 on the first end surface 30 along the first direction and the second water inlet 32.

Specifically, the distance between the water flowing from the first water inlet 31 to the first water outlet 41 is equal to the distance between the water flowing from the second water inlet 32 to the first water outlet 41, the raw water flows into the filtering module 100 from the first water inlet 31 and the second water inlet 32, and is treated by the filtering membrane 20 to generate the concentrated water, and the concentrated water is guided out of the filtering module 100 from the first water outlet 41.

So, the distance of first water inlet 31 to first delivery port 41 equals with the distance of second water inlet 32 to first delivery port 41, joins after filtering module 100 internal water flow dispersion, increases inside rivers disturbance, has reduced the stagnant water district of first terminal surface 30, further promotes filtering module 100's anti decay nature.

Referring to fig. 4 and 5, in some embodiments, the filter module 100 includes a circumferential surface 50 surrounding the filter membrane 20, the circumferential surface 50 being provided with an opening area 51.

Specifically, the filtration module 100 includes a circumferential surface 50, the circumferential surface 50 is a planar body formed by wrapping the sealing material around the outer surface of the filtration membrane 20, and the circumferential surface 50 may be made of plastic, that is, the circumferential surface 50 is disposed around the first end surface 30 and the second end surface 40. The circumferential surface 50 is provided with an opening area 51, the opening area 51 is used for introducing raw water, and there may be one or a plurality of opening areas 51, for example, referring to fig. 6, in the case where there are a plurality of opening areas 51, the plurality of opening areas 51 are arranged in an array along the first direction and the second direction. It should be noted that the second direction is perpendicular to the first direction, that is, the second direction is a direction perpendicular to the base pipe 10.

It should be noted that in the case where the open area 51 introduces raw water, the raw water of the open area 51 may increase the flow of raw water between the first and second water inlets 31 and 32 and disturb the dead water region of the second end surface 40 near the central pipe 10 and near the circumferential surface 50.

Thus, by providing the opening area 51 on the circumferential surface 50, the dead water area of the second end surface 40 near the central tube 10 and near the circumferential surface 50 can be eliminated, and the raw water flow between the first water inlet 31 and the second water inlet 32 can be increased, thereby improving the attenuation resistance of the filter module 100.

Referring to fig. 4, in some embodiments, a distance between the first water inlet 31 and the central tube 10 is smaller than a distance between the second water inlet 32 and the central tube 10, and a distance between a projection of the first water outlet 41 on the first end surface 30 along the first direction and the first water inlet 31 is smaller than a distance between a projection of the first water outlet 41 on the first end surface 30 along the first direction and the second water inlet 32.

In particular, the first water inlet 31 is arranged at the first end face 30 close to the central tube 10 and the second water inlet 32 is arranged at the first end face 30 far from the central tube 10, i.e. the distance between the first water inlet 31 and the central tube 10 is smaller than the distance between the second water inlet 32 and the central tube 10. In the case where the open area 51 is provided in the circumferential surface 50, the raw water enters the filter module 100 through the first water inlet 31, the second water inlet 32, and the open area 51.

The distance between the projection of the first water outlet 41 onto the first end surface 30 in the first direction and the first water inlet 31 is smaller than the distance between the projection of the first water outlet 41 onto the first end surface 30 in the first direction and the second water inlet 32, i.e. the first water outlet 41 is arranged close to the central tube 10. In the case that a certain flow rate of raw water exists in the open area 51, the flow rate and direction of the raw water in the first and second water inlets 31 and 32 are changed, and the flow rate of the concentrated water in the first water outlet 41 is increased by setting the position of the first water outlet 41.

In this way, when the raw water is introduced into the open area 51, the first water outlet 41 is disposed close to the central tube 10, so that the flow loss of the water flow in the filter module 100 can be reduced and the flow rate of the concentrated water in the first water outlet 41 can be increased.

Referring to fig. 4-7, in some embodiments, the first water outlet 41 includes a first side wall 411 and a second side wall 412, the second side wall 412 is located on a side of the first side wall 411 away from the central tube 10, the second water inlet 32 includes a third side wall 321 and a fourth side wall 322, and the third side wall 321 is located on a side of the fourth side wall 322 close to the central tube 10. The included angle between the direction of the sum of the water velocity vector of the second water inlet 32 and the water velocity vector of the open area 51 and the first end surface 30 is not less than the included angle between the connecting line of the fourth side wall 322 and the first side wall 411 and the first end surface 30, and not more than the included angle between the connecting line of the third side wall 321 and the second side wall 412 and the first end surface 30.

Specifically, the first sidewall 411 and the second sidewall 412 are located at the second end face 40, the first sidewall 411 is proximate to the center tube 10, the second sidewall 412 is distal to the center tube 10, the third sidewall 321 and the fourth sidewall 322 are located at the first end face 30, the third sidewall 321 is proximate to the center tube 10, and the fourth sidewall 322 is distal to the center tube 10. The first end 30 and the second end 40 may be made of a plastic material, that is, the first side wall 411, the second side wall 412, the third side wall 321, and the fourth side wall 322 may be made of a plastic material and sealed by glue or other methods.

Further, an angle between a connection line of the fourth sidewall 322 and the first sidewall 411 and the first end surface 30 is set as a1, and an angle between a connection line of the third sidewall 321 and the second sidewall 412 and the first end surface 30 is set as a2. The water velocity vector sum a0 can be obtained from V1 and V2, where V1 is the water velocity in the direction parallel to the center pipe 10 and V2 is the water velocity in the direction perpendicular to the center pipe 10, that is, V1 is the water velocity of the second water inlet 32 and V2 is the water velocity of the open area 51.

Where a1 is less than a2, and a0 is less than a1 or a0 is greater than a2, the water in the second water inlet 32 flows to the first side wall 411 or the second side wall 412, resulting in a large water flow loss. Under the condition that a1 is more than or equal to a0 and less than or equal to a2, the water at the second water inlet 32 flows to the first water outlet 41, and the water flow loss is small. It is understood that the connecting line between the first sidewall 411 and the second sidewall 412 and the third sidewall 321 and the fourth sidewall 322, respectively, and the first end surface 30 may have four included angles, where a1 is the minimum included angle and a2 is the maximum included angle.

It should be noted that, referring to fig. 8, during the filtering process, the water flow Q around the filtering module 100 is approximately the same, Q = S × V (S is the water inlet area, and V is the water flow speed), that is, the water inlet area and the water flow speed are inversely proportional. The width of the second water inlet 32 is L1, the length of the open area 51 or the open areas 51 is L2, 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 × L1 × d of the second water inlet 32 can be obtained, the water inlet area S2= a × L2 × d of the open area 51 is inversely proportional to V1, and S2 is inversely proportional to V2.

Therefore, the optimal size matching of the second water inlet 32 and the opening area 51 can be calculated according to the position and the size of the first water outlet 41, so that the water flow loss is reduced, the thick water flow speed of the first water outlet 41 is increased, and the attenuation resistance of the filter module 100 is improved.

Referring to fig. 9-11, in some embodiments, the first end surface 30 further includes a third water inlet 33, the third water inlet 33 is located between the first water inlet 31 and the second water inlet 32, the second end surface 40 further includes a second water outlet 42, and the second water outlet 42 is located on a side of the first water outlet 41 facing away from the central pipe 10.

Specifically, the first end surface 30 is provided with three raw water inlets, namely a first water inlet 31, a second water inlet 32 and a third water inlet 33, wherein the first water inlet 31 is disposed near the central tube 10, the second water inlet 32 is disposed at the first end surface 30 far from the central tube 10, and the third water inlet 33 is disposed between the first water inlet 31 and the second water inlet 32. The second end surface 40 is provided with two concentrated water outlets, which are a first water outlet 41 and a second water outlet 42, respectively, the first water outlet 41 is arranged close to the central tube 10, and the second water outlet 42 is arranged far away from the central tube 10.

In some embodiments, the projection of the first water outlet 41 on the first end surface 30 along the first direction is located between the first water inlet 31 and the third water inlet 33, and the projection of the second water outlet 42 on the first end surface 30 along the first direction is located between the second water inlet 32 and the third water inlet 33, that is, the first water outlet 41 and the second water outlet 42 are uniformly offset from the first water inlet 31, the second water inlet 32, and the third water inlet 33, respectively.

Further, raw water is introduced into the filter module 100 through the first water inlet 31, the second water inlet 32 and the third water inlet 33, the raw water is filtered by the filter membrane 20 to generate concentrated water and pure water, the pure water is led out through the central tube 10, and the concentrated water is led out through the first water outlet 41 and the second water outlet 42.

It should be noted that the third water inlet 33 and the second water outlet 42 may be disposed in a circular ring shape, the number of the water inlets includes but is not limited to three, the number of the water outlets includes but is not limited to two, that is, the number of the water inlets may include N +1, the number of the water outlets may include N, and the N +1 water inlets and the N water outlets are disposed in a uniformly staggered manner.

So, through setting up third inlet 33 and second delivery port 42, and first delivery port 41 and second delivery port 42 respectively with first water inlet 31, second water inlet 32, the even dislocation set of third inlet 33 for the inside rivers of filter module 100 are further dispersed and are converged, increase inside rivers disturbance, have reduced first terminal surface 30 stagnant water district, further promote the anti-attenuation nature of filter module 100.

Referring to fig. 12, the present invention further provides a water purifying apparatus 1000, wherein the water purifying apparatus 1000 includes a filtering module 100.

Therefore, the utility model discloses a purifier 1000 is through setting up first water inlet 31 and second water inlet 32 at first terminal surface 30 to set up first delivery port 41 at second terminal surface 40, can prolong the flow path of raw water, promote the desalination of filtering module 100, can eliminate simultaneously and filter module 100 first terminal surface 30 and be close to the center tube 10 and be close to the dead water region of outer periphery 50, promote the anti attenuation ability of filtering module 100.

The water purifying apparatus 1000 may further include an opening 51 formed in the circumferential surface 50, so that a dead water region of the second end surface 40 close to the central tube 10 and the circumferential surface 50 may be eliminated, and a flow of raw water between the first water inlet 31 and the second water inlet 32 may be increased, thereby improving an attenuation resistance of the filter module 100.

Purifier 1000 can also be through setting up third inlet 33 and second delivery port 42, and first delivery port 41 and second delivery port 42 respectively with first water inlet 31, second water inlet 32, the even dislocation set of third inlet 33 for the rivers inside the module 100 of filtering are further dispersed and are converged again, increase inside rivers disturbance, have reduced first terminal surface 30 stagnant water district, further promote the anti-attenuation nature of the module 100 of filtering.

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 (13)

1. A filtration module, comprising:

a central tube;

the filter membrane is rolled on the central tube;

the first end face is positioned at one end of the filtering membrane, and a first water inlet and a second water inlet are 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 first end face, and the projection of the first water outlet on the first end face along the first direction is positioned between the first water inlet and the second water inlet.

2. The filtration module of claim 1, wherein a distance between a projection of the first water outlet onto the first end surface in the first direction and the first water inlet is equal to a distance between a projection of the first water outlet onto the first end surface in the first direction and the second water inlet.

3. The filtration module of claim 1, wherein the width of the first inlet is equal to the width of the second inlet, and the width of the first outlet is no greater than the sum of the widths of the first and second inlets and no less than one third of the width of the first or second inlet.

4. A filtration module according to claim 1, comprising a circumferential surface surrounding the filtration membrane, said circumferential surface being provided with an open area.

5. The filter module of claim 4, wherein a distance between the first water inlet and the center tube is less than a distance between the second water inlet and the center tube, and a distance between a projection of the first water outlet in the first direction onto the first end surface and the first water inlet is less than a distance between a projection of the first water outlet in the first direction onto the first end surface and the second water inlet.

6. The filtration module of claim 5, wherein the first water outlet comprises a first sidewall and a second sidewall, the second sidewall being located on a side of the first sidewall remote from the center tube, the second water inlet comprises a third sidewall and a fourth sidewall, the third sidewall being located on a side of the fourth sidewall proximate to the center tube;

the included angle between the direction of the sum of the water velocity vector of the second water inlet and the water velocity vector of the opening area and the first end face is not less than the included angle between the connecting line of the fourth side wall and the first end face, and is not more than the included angle between the connecting line of the third side wall and the second side wall and the first end face.

7. The filtration module of claim 4 wherein said open area comprises a plurality, said plurality being arranged in an array along a first direction and a second direction.

8. The filtration module of claim 1, wherein the first end face further comprises a third water inlet positioned between the first water inlet and the second water inlet, and the second end face further comprises a second water outlet positioned on a side of the first water outlet facing away from the central tube.

9. The filtration module of claim 8, wherein a projection of the first water outlet onto the first end surface in the first direction is located between the first water inlet and the third water inlet, and a projection of the second water outlet onto the first end surface in the first direction is located between the second water inlet and the third water inlet.

10. The filtration module of claim 8, wherein the first water inlet, the second water inlet, the third water inlet, the first water outlet, and the second water outlet are all annular.

11. 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.

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

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

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