CN219355863U - Filtering membrane component, internal pressure type filtering device and external pressure type filtering device thereof - Google Patents

Abstract

The utility model relates to a filtering membrane component, an internal pressure type filtering device and an external pressure type filtering device. The filtering membrane component comprises a filtering membrane group and an interface piece. The filtering membrane group comprises a filtering shell and a filtering core, wherein the inner space of the filtering core is the inner space of the filtering core, and the outer space of the filtering core is the space between the filtering core and the filtering shell. The interface piece has the water collecting port, and the interface piece sets up in the both ends of filtration membrane group, and the extramembranous space communicates in the external space through the water collecting port, and the intraductal space of membrane communicates in the external space through the filter core port. So set up, when filtration membrane subassembly is external pressure formula, the drain communicates in the membrane outer space, produces the mouth of a river and communicates in the membrane inner space can, when filtration membrane subassembly will be from external pressure formula conversion to interior pressure formula, the drain communicates in the membrane inner space, produce the mouth of a river communicate in the membrane outer space can, need not to change the interface of filtration membrane subassembly itself to realize filtration membrane subassembly internal pressure formula and external pressure formula general.

Description

Filtering membrane component, internal pressure type filtering device and external pressure type filtering device thereof

Technical Field

The utility model relates to the technical field of filter devices, in particular to a filter membrane component, an internal pressure type filter device and an external pressure type filter device thereof.

Background

Generally, when the filtering membrane component is an internal pressure type membrane component and raw water cannot meet the water inlet requirement, the internal pressure type membrane component and the external pressure type membrane component are required to be replaced by external pressure type membrane components with low water inlet requirement, however, the positions and the sizes of the water inlet and the water outlet of the internal pressure type membrane component and the external pressure type membrane component are different, so that the conversion performance of the internal pressure type and the external pressure type of the filtering membrane component is poor. For example, in chinese patent application nos. 2019207883210 and 2019204353157, when the membrane module or ultrafiltration device is converted from an internal pressure type to an external pressure type, the water flow direction of the water inlet and the water outlet needs to be changed, which results in complicated conversion operation and difficult conversion of the filtration membrane module.

Disclosure of Invention

Based on this, it is necessary to provide a filtration membrane module aiming at realizing a filtration membrane module commonly used by internal pressure type and external pressure type.

In order to achieve the above object, the present utility model provides a filtering membrane module, which includes a filtering membrane group and an interface member; wherein, the liquid crystal display device comprises a liquid crystal display device,

the filter membrane group comprises a filter shell and a filter element, the filter element is arranged in the filter shell, the filter membrane group is provided with an inner membrane space and an outer membrane space, the inner membrane space is the inner space of the filter element, and the outer membrane space is the space between the filter element and the filter shell;

the interface piece has the water collecting port, the interface piece includes first interface piece and second interface piece, first interface piece with the second interface piece set up respectively in the both ends of filtration membrane group, the extramembranous space passes through the water collecting port communicates in the external space, the intramembrane space passes through the filter core port communicates in the external space.

Through the technical scheme, the interface piece is arranged at the two ends of the filtering membrane group, the interface piece is provided with the water collecting port and is sealed at the end part of the filtering membrane group, the outer space of the filtering membrane is communicated with the outer space through the water collecting port, the inner space of the filtering membrane is communicated with the outer space through the two ends of the filter element, one end of the filtering membrane component is provided with two interfaces which are respectively the interface communicated with the inner space of the filtering membrane and the interface communicated with the outer space of the filtering membrane, when the filtering membrane component is in an external pressure type, the sewage outlet is communicated with the outer space of the filtering membrane, when the filtering membrane component is to be converted into an internal pressure type from the external pressure type, the sewage outlet is communicated with the inner space of the filtering membrane, and the water outlet is communicated with the outer space of the filtering membrane component without changing the interface of the filtering membrane component, so that the internal pressure type and the external pressure type of the filtering membrane component are universal.

In some embodiments of the utility model, the filter element is a hollow fiber membrane, and the filtering membrane group is provided with a plurality of hollow fiber membranes; the water distribution channel with an opening facing the interior of the filtering membrane group is arranged on the interface piece, the side face of the water collecting port is communicated with the water distribution channel, one end of the water collecting port facing the external space is a water inlet end, the other end of the water collecting port is closed, and the water inlet end is communicated with the extramembranous space through the water distribution channel.

Through the technical scheme, water in the external space of one side of the membrane can flow to the water collecting port in a concentrated manner through the water distribution channel, and water entering from the water collecting port can flow to the water distribution channel and enter the external space of the membrane through the water distribution channel, so that water short circuits caused by uneven water distribution and uneven flow state due to the fact that water directly enters the external space of the membrane through the water collecting port are effectively avoided, water can be effectively distributed through the water distribution channel, and water distribution of the filter membrane group is reasonable.

In some embodiments of the utility model, the water distribution channel comprises a water channel and a water diversion channel, wherein the end part of the water channel is communicated with the side surface of the water collecting port, and the water diversion channel is a branch of the water channel; and taking the intersection point of the water channel and the water diversion channel as a intercept point, dividing the water channel into a plurality of sections, wherein the cross-sectional area of each section of water channel is gradually increased along the direction pointing to the central shaft of the water collecting port.

Through the technical scheme, the water flowing channel is closer to the water collecting port, the water inflow rate of the channel section is higher, the flowing cross section area of each section of water flowing channel is gradually increased along the direction of the central shaft of the water collecting port, on one hand, the channel section close to the water collecting port can be ensured to have enough flowing channels to receive the water inflow rate, and on the other hand, the water flowing channel can be ensured to have enough flowing channels to receive the water outflow rate converged from the water dividing channel.

In some embodiments of the utility model, the interface further comprises a distribution plate disposed at the water inlet end, the distribution plate having a convex configuration surrounding the water inlet end.

Through foretell technical scheme, the distribution board can be with the part inflow flow of water collecting port department evenly drainage to the water distribution canal in, further makes the water distribution in the filter membrane group even, and the convex structure of distribution board surrounding the water inlet simultaneously can effectively strengthen the impact strength of distribution board.

In some embodiments of the present utility model, the first interface piece and the second interface piece are respectively cast at two ends of the filtering membrane group; the filtering membrane assembly further comprises an end cover assembly, the end cover assembly comprises an upper end cover and a lower end cover which are respectively arranged at two ends of the filtering membrane assembly, the upper end cover is provided with a water producing port and a sewage draining port, the lower end cover is provided with a water inlet, the upper end cover is connected with one end of the filtering membrane assembly, which is provided with a first interface piece, and the lower end cover is connected with one end of the filtering membrane assembly, which is provided with a second interface piece.

The present utility model also provides an internal pressure type filtering device including:

the water producing port connecting piece is arranged in the upper end cover;

the water blocking piece is arranged inside the lower end cover;

the filtering membrane component is characterized in that the first connector is provided with a first water collecting port, the second connector is provided with a second water collecting port, the first water collecting port is communicated with the water producing port through the water producing port connecting piece, and the water blocking piece is used for sealing the second water collecting port.

Through the technical scheme, raw water is input from the water inlet of the lower end cover, and because the second water collecting port is closed by the water blocking piece, the raw water can only enter the membrane inner space through the filter element port, the raw water is filtered to the part of the outer space from the membrane inner space through the filter membrane and is purified water, the part of the raw water left in the inner space is sewage, the purified water in the outer space flows out from the water producing port of the upper end cover through the first water collecting port and the water producing port connecting piece communicated with the first water collecting port, and the sewage in the inner space enters the upper end cover through the filter element port and flows out from the sewage draining outlet, so that the internal pressure type filter membrane device is realized.

The utility model also provides an external pressure type filtering device, which comprises:

the drain outlet connecting piece is arranged inside the upper end cover;

the water inlet connecting piece is arranged inside the lower end cover;

the filtering membrane component is characterized in that the first interface piece is provided with a first water collecting port, the second interface piece is provided with a second water collecting port, the first water collecting port is communicated with the sewage outlet through the sewage outlet connecting piece, and the second water collecting port is communicated with the water inlet through the water inlet connecting piece.

Through the technical scheme, raw water is input from the water inlet of the lower end cover, and enters the outer membrane space from the second water collecting port through the water inlet connecting piece communicated with the water inlet of the lower end cover, the raw water is filtered to the inner membrane space from the outer membrane space through the filter membrane to obtain purified water, the raw water remained in the outer membrane space is sewage, the purified water in the inner membrane space enters the upper end cover through the filter core port and flows out from the water producing port, and the sewage in the outer membrane space flows out from the sewage draining port of the upper end cover through the first water collecting port and the sewage draining port connecting piece communicated with the first water collecting port, so that the outer pressure type filter membrane device is realized.

According to the technical scheme, the two ends of the filtering membrane group are provided with the interface pieces, the interface pieces are provided with the water collecting ports and are sealed at the end parts of the filtering membrane group, the outer membrane space is communicated with the outer space through the water collecting ports, the inner membrane space is communicated with the outer space through the two ends of the filter element, one end of the filtering membrane component is provided with two interfaces, namely the interface communicated with the inner membrane space and the interface communicated with the outer membrane space, when the filtering membrane component is in an external pressure type, the sewage outlet is communicated with the outer membrane space, when the filtering membrane component is converted from the external pressure type into an internal pressure type, the sewage outlet is communicated with the inner membrane space, and the water producing ports are communicated with the outer membrane space without changing the interface of the filtering membrane component, so that the purposes of the internal pressure type and the external pressure type of the filtering membrane component are achieved.

Drawings

FIG. 1 is a schematic view of a first view angle structure of an embodiment of a filtering membrane module according to the present utility model;

FIG. 2 is a schematic view of a first view structure of an interface member according to an embodiment of the filtering membrane module of the present utility model;

FIG. 3 is a schematic view showing a first view angle structure of an internal pressure type filtering apparatus according to an embodiment of the present utility model;

fig. 4 is a schematic view showing a first view angle structure of an external pressure type filtering device according to an embodiment of the present utility model.

Reference numerals illustrate:

1000. a filtration membrane module; 100. a filtration membrane group; 110. a filter shell; 111. an extramembranous space; 120. a filter element; 121. an intra-membrane space; 130. a hollow fiber membrane; 200. an interface member; 210. a water collecting port; 220. a distribution plate; 230. distributing channels; 231. passing through the ditch; 232. a diversion trench; 231a, a first water channel section; 231b, a second water channel section; 240. giving way; 300. a first interface member; 310. a first water collecting port; 400. a second interface member; 410. a second water collecting port; 510. an upper end cap; 511. a water producing port; 512. a sewage outlet; 520. a lower end cap; 521. a water inlet; 2000. an internal pressure type filtering device; 600. a water producing port connecting piece; 700. a water shutoff member; 3000. an external pressure type filtering device; 800. a drain connector; 900. and a water inlet connecting piece.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present utility model, it should 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", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, may be in communication with each other, or may be in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present utility model provides a filtering membrane module 1000, where the filtering membrane module 1000 includes a filtering membrane group 100 and an interface 200. The filtering membrane group 100 comprises a filtering shell 110 and a filtering core 120, the filtering core 120 is internally arranged in the filtering shell 110, the filtering membrane group 100 is provided with an inner membrane space 121 and an outer membrane space 111, the inner membrane space 121 is the inner space of the filtering core 120, and the outer membrane space 111 is the space between the filtering core 120 and the filtering shell 110. The filter element 120 may be an ultrafiltration membrane filter element, a nanofiltration membrane filter element, or other filter elements, which are not particularly limited herein. The interface piece 200 has a water collecting port 210, the interface piece 200 includes a first interface piece 300 and a second interface piece 400, the first interface piece 300 and the second interface piece 400 are respectively disposed at two ends of the filtering membrane group 100, the outer space 111 of the membrane is communicated with an external space through the water collecting port 210, and the inner space 121 of the membrane is communicated with the external space through a port of the filter element 120.

Referring to fig. 1 and 2, the interface members 200 may be disposed at two ends of the filtering membrane module 100 by casting. Specifically, the interface piece 200 is provided with a yielding channel 240 to yield a placement space of the end of the filter element 120, the interface piece 200 is disposed inside the filter shell 110, the interface piece 200 and the end of the filter element 120 are cast at the end of the filter shell 110, two ends of the filter element 120 are opened, and the interface piece 200 is exposed out of the water collecting port 210. The casting material may be epoxy resin, polyurethane or other pouring sealant, and is not particularly limited herein. So set up, the both ends of filtration membrane group 100 are provided with interface piece 200, interface piece 200 has water collecting port 210 and seals in the tip of filtration membrane group 100, membrane outer space 111 communicates in the outer space through water collecting port 210, membrane inner space 121 communicates in the outer space through filter core 120 both ends, make the one end of filtration membrane subassembly 1000 have two interfaces, be the interface that communicates in membrane inner space 121 and the interface that communicates in membrane outer space 111 respectively, make filtration membrane subassembly 1000 be external pressure type when, drain 512 communicates in membrane outer space 111, produce mouth 511 intercommunication in membrane inner space 121 can, when filtration membrane subassembly 1000 is to be from external pressure type to interior pressure type, drain 512 communicates in membrane inner space 121, produce mouth 511 intercommunication in membrane outer space 111 can, need not to change the interface of filtration membrane subassembly 1000 itself, thereby realize filtration membrane subassembly 1000 internal pressure type and external pressure type's general.

Further, referring to fig. 1 and 2, the filter element 120 is a hollow fiber membrane 130, and the filtration membrane set 100 has a plurality of hollow fiber membranes 130 therein. The interface piece 200 is provided with a water distribution channel 230 with an opening facing the inside of the filtering membrane group 100, the side surface of the water collecting port 210 is communicated with the water distribution channel 230, one end of the water collecting port 210 facing the external space is a water inlet end, the other end is closed, and the water inlet end is communicated with the outer space 111 through the water distribution channel 230. The water collecting port 210 may be provided in other shapes such as a cylindrical shape, a square cylindrical shape, etc., and is not particularly limited herein. By the arrangement, water flow in one side of the outer membrane space 111 can flow to the water collecting port 210 in a concentrated manner through the water distribution channel 230, and water flow entering from the water collecting port 210 flows to the water distribution channel 230 and enters the outer membrane space 111 through the water distribution channel 230, so that water flow short circuit caused by uneven water distribution and uneven flow state due to the fact that water flow directly enters the outer membrane space 111 through the water collecting port 210 is effectively avoided, water distribution of the water distribution channel 230 can be effectively achieved, and water distribution of the filter membrane group 100 is reasonable.

Specifically, referring to fig. 2, the water distribution channel 230 includes a water channel 231 and a water diversion channel 232, the end of the water channel 231 is connected to the side of the water collecting port 210, and the water diversion channel 232 is a branch of the water channel 231. The number of the water channels 231 may be 1 or more, and is not particularly limited herein. The number of the water diversion channels 232 may be 1 and above, and is not particularly limited herein. The angle between the water diversion channel 232 and the water passing channel 231 may be a right angle or an acute angle, and is not particularly limited herein. Illustratively, a water channel 231 extends through the water collection port 210, and a plurality of water channels 232 are perpendicular to the water channel 231.

Referring to fig. 2, the water channel 231 is divided into a plurality of segments by taking the intersection of the water channel 231 and the water channel 232 as an intercept point, and the cross-sectional area of each segment of the water channel 231 increases step by step along the direction pointing to the central axis of the water collecting port 210. Specifically, the cross-sectional area of each water channel 231 is not less than twice the sum of the cross-sectional areas of the water channels 232 through which water flows before flowing to the water channel 231, taking the flow direction of the water flow to the water collecting port 210 as the flow direction. Illustratively, the water channel 231 is divided into a first water channel 231a and a second water channel 231b in a direction directed toward the central axis of the water collecting port 210, wherein the cross-sectional area of the first water channel 231a is not smaller than four times the cross-sectional area of the water channel 232, and the cross-sectional area of the second water channel 231b is not smaller than twice the cross-sectional area of the water channel 232. So set up, the channel water inflow that is close to water collection mouth 210 more is crossed canal 231, and the cross-sectional area that overflows of every section water canal 231 increases along the direction of directional water collection mouth 210 center pin step by step can ensure that the canal that is close to water collection mouth 210 has sufficient passageway of crossing to accept the inflow on the one hand, and on the other hand can ensure that cross canal 231 has sufficient passageway of crossing to accept the outflow that converges from water diversion canal 232.

Further, the interface 200 further includes a distribution plate 220, where the distribution plate 220 is disposed at the water inlet end, and the distribution plate 220 has a convex structure surrounding the water inlet end. By the arrangement, the distribution plate 220 can uniformly guide part of water inflow at the water collecting port 210 to the water distribution channel 230, so that water distribution in the filter membrane group 100 is uniform, and meanwhile, the impact strength of the distribution plate 220 can be effectively enhanced due to the convex structure of the distribution plate 220 surrounding the water inlet end.

It should be noted that, the functions of the water distribution channel 230 and the distribution plate 220 are not limited to water distribution, and when the air is introduced into the water collection port 210, the water distribution channel 230 and the distribution plate 220 have good air distribution function, so that the air flow is prevented from being linearly distributed along the water collection port, and uniform air distribution is realized.

Specifically, referring to fig. 3 and 4, the first interface 300 and the second interface 400 are respectively cast at two ends of the filtering membrane set 100; the filtering membrane module 1000 further includes an end cap module including an upper end cap 510 and a lower end cap 520 respectively installed at both ends of the filtering membrane module 100, the upper end cap 510 having a water outlet 511 and a drain outlet 512, the lower end cap 520 having a water inlet 521, the upper end cap 510 being connected to one end of the filtering membrane module 100 having the first interface 300, and the lower end cap 520 being connected to one end of the filtering membrane module 100 having the second interface 400.

Referring to fig. 3, the present utility model further provides an internal pressure type filtering device 2000, where the internal pressure type filtering device 2000 includes a water producing port connecting member 600, a water blocking member 700, and the filtering membrane module 1000. The water producing port connecting piece 600 is arranged inside the upper end cover 510, the water blocking piece 700 is arranged inside the lower end cover 520, the first connector 300 is provided with a first water collecting port 310, the second connector 400 is provided with a second water collecting port 410, the first water collecting port 310 is communicated with the water producing port 511 through the water producing port connecting piece 600, and the water blocking piece 700 seals the second water collecting port 410. Thus, raw water is input from the water inlet 521 of the lower end cover 520, and as the second water collecting port 410 is closed by the water blocking member 700, raw water can only enter the membrane inner space 121 through the port of the filter element 120, the part of raw water which is filtered from the membrane inner space 121 to the membrane outer space 111 through the filter membrane is purified water, the part of raw water which is left in the membrane inner space 121 is sewage, and the purified water of the membrane outer space 111 flows out from the water outlet 511 of the upper end cover 510 through the first water collecting port 310 and the water outlet connecting member 600 which is communicated with the first water collecting port, and the sewage of the membrane inner space 121 enters the upper end cover 510 through the port of the filter element 120 and flows out from the sewage drain 512, so that the internal pressure type filtering membrane device is realized.

Referring to fig. 4, the present utility model further provides an external pressure type filtering device 3000, where the external pressure type filtering device 3000 includes a drain connector 800, a water inlet connector 900, and the filtering membrane module 1000. The drain connector 800 is disposed inside the upper end cover 510, the water inlet connector 900 is disposed inside the lower end cover 520, the first connector 300 has a first water collecting port 310, the second connector 400 has a second water collecting port 410, the first water collecting port 310 is communicated with the drain 512 through the drain connector 800, and the second water collecting port 410 is communicated with the water inlet 521 through the water inlet connector 900. So configured, raw water is input from the water inlet 521 of the lower end cap 520 and enters the outer membrane space 111 from the second water collecting port 410 through the water inlet connector 900 communicated with the water inlet 521 of the lower end cap 520, the part of raw water which is filtered from the outer membrane space 111 to the inner membrane space 121 through the filter membrane is purified water, the part of raw water which remains in the outer membrane space 111 is sewage, the purified water of the inner membrane space 121 enters the upper end cap 510 through the port of the filter element 120 and flows out from the water producing port 511, and the sewage of the outer membrane space 111 flows out from the sewage discharging port 512 of the upper end cap 510 through the first water collecting port 310 and the sewage discharging port connector 800 communicated with the first water collecting port 310, so that the external pressure type filtering membrane device is realized.

When the filter membrane assembly 100 is of an external pressure type, the external pressure type filter device 3000 may perform gas scrubbing by mixing air and water with pressurized air from the water inlet 521 when gas scrubbing is required, thereby effectively removing impurities adhering to the surface of the filter element 120 and discharging wastewater containing impurities from the drain 512 or the water inlet 521.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A filtration membrane module, characterized in that the filtration membrane module comprises:

the filter membrane group comprises a filter shell and a filter element, wherein the filter element is arranged in the filter shell, the filter membrane group is provided with an inner membrane space and an outer membrane space, the inner membrane space is the inner filter element space, and the outer membrane space is the space between the filter element and the filter shell;

the interface piece, the interface piece has the water collecting port, the interface piece includes first interface piece and second interface piece, first interface piece with the second interface piece set up respectively in the both ends of filtration membrane group, the extramembranous space passes through the water collecting port communicates in the external space, the intramembrane space passes through the filter core port communicates in the external space.

2. The filtration membrane module according to claim 1, wherein the interface member is provided with a water distribution channel with an opening facing the inside of the filtration membrane module, the side surface of the water collecting port is communicated with the water distribution channel, one end of the water collecting port facing the external space is a water inlet end, the other end is closed, and the water inlet end is communicated with the external space through the water distribution channel.

3. The filtration membrane module of claim 2, wherein the water distribution channel comprises a water channel and a water diversion channel, the water channel end is communicated with the water collection port side, and the water diversion channel is a branch of the water channel.

4. A filtration membrane module in accordance with claim 3, wherein the water channel is divided into a plurality of segments with the intersection of the water channel and the water distribution channel as an intercept point, and the cross-sectional area of each segment of the water channel increases stepwise in a direction pointing to the central axis of the water collection port.

5. The filtration membrane module of claim 2, wherein the interface member further comprises a distribution plate disposed at the water inlet end, the distribution plate having a convex configuration surrounding the water inlet end.

6. The filtration membrane module of claim 1, wherein the first interface piece and the second interface piece are cast at two ends of the filtration membrane module, respectively.

7. The filtration membrane module of claim 1, wherein the filter element is a hollow fiber membrane, and the filtration membrane module has a plurality of hollow fiber membranes therein.

8. The filtration membrane module of any one of claims 1-7, further comprising an end cap assembly comprising an upper end cap and a lower end cap mounted to each end of the filtration membrane module, the upper end cap having a water outlet and a drain outlet, the lower end cap having a water inlet, the upper end cap being connected to an end of the filtration membrane module having the first interface, the lower end cap being connected to an end of the filtration membrane module having the second interface.

9. An internal pressure type filtering device, characterized in that the internal pressure type filtering device comprises:

the water producing port connecting piece is arranged in the upper end cover;

the water blocking piece is arranged inside the lower end cover;

the filtration membrane assembly of claim 8, the first interface member having a first water collection port, the second interface member having a second water collection port, the first water collection port being in communication with the water production port through the water production port connection member, the water shutoff member closing the second water collection port.

10. An external pressure type filtering device, characterized in that the external pressure type filtering device comprises:

the drain outlet connecting piece is arranged inside the upper end cover;

the water inlet connecting piece is arranged inside the lower end cover;

the filtration membrane assembly of claim 8, the first interface member having a first water collection port, the second interface member having a second water collection port, the first water collection port being in communication with the drain port through the drain port connector, the second water collection port being in communication with the water inlet through the water inlet connector.