CN217600426U - Membrane module and filter element structure - Google Patents

Abstract

The utility model relates to a membrane module and filter core structure, membrane module include center tube and membrane element, wherein: the membrane element is sleeved and fixed on the central tube; the central tube is a tubular structure with openings at two ends, and comprises a first tube body, a second tube body and a third tube body, wherein the second tube body and the third tube body are positioned at two sides of the first tube body; the membrane structures with different performances can be combined, and the membrane structure is suitable for different occasions; when one membrane module is blocked, the membrane module is separated from other membrane modules and replaced, so that the use cost is reduced.

Description

Membrane module and filter element structure

Technical Field

The utility model relates to a water purification unit technical field especially relates to a membrane module and filter core structure.

Background

Along with the improvement of the living quality requirements of people, the quality requirements of people on drinking water are higher and higher, the water purifier is more and more popular among people, the water purifier is used as water treatment equipment, is connected into municipal water, well water, mountain spring water and the like, is subjected to internal purification treatment, outputs pure water meeting the sanitary and health standards, and is widely applied to occasions such as public drinking water, household kitchens, water delivery pipelines and the like.

The main part of the existing water purifier is a filter element structure, particularly the single-stage reverse osmosis filter element structure is widely applied, the single-stage reverse osmosis filter element structure mainly comprises a shell and a membrane component fixed in the shell, the membrane component is formed by rolling a membrane and a filter screen, a filter cloth and the like arranged on the membrane, the size and the performance (such as the recovery rate of wastewater) are fixed and cannot be adjusted after the membrane is rolled, and the membrane cannot be mixed to obtain different performances, so that the membrane component can only be applied to one corresponding shell with one fixed performance. If the single-stage reverse osmosis filter element structure with different performances is required or the shell is not universal, a new membrane and a new shell need to be developed, and the corresponding membrane element is additionally rolled, so that the universality is poor, the development cost is high, more molds need to be invested, and the membrane element with a larger size cannot be rolled under the requirements of technological rolling or equipment limitation. In addition, when the wastewater recovery rate is high, the membrane module is easy to block, if the membrane module is not replaced, the wastewater is high, the product yield is low, and if the membrane module is replaced, the whole membrane module needs to be replaced, so that the use cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a membrane assembly and a filter element structure aiming at the problems of poor universality, single performance and high use cost of the existing filter element structure.

The utility model provides a membrane module, including center tube and membrane element, wherein:

the membrane element is sleeved and fixed on the central tube;

the central tube is a tubular structure with two open ends, and comprises a first tube body, a second tube body and a third tube body, wherein the second tube body and the third tube body are arranged on two sides of the first tube body, the first tube body is arranged in the membrane element and is provided with a plurality of converging holes running through the tube wall of the first tube body, the second tube body and the third tube body respectively protrude out of two end parts of the membrane element, an end face opening of the third tube body is provided with a first groove, the first groove is coaxially arranged with the first tube body, and the first groove of the membrane assembly is detachably connected with the second tube body of the membrane assembly.

In the membrane module, raw water is filtered by the membrane elements, pure water enters the central pipe, wastewater is discharged by the membrane elements, the membrane modules are used as general monomers of the membrane structure to realize the filtration of the raw water, and when the membrane modules are combined, the first groove of one membrane module is connected with the second pipe body of the other membrane module so as to ensure that a plurality of membrane modules are superposed and combined to further obtain the membrane structure with required size, so that the membrane module can be suitable for shells with different sizes, and at the moment, the flux of the membrane structure is the sum of the fluxes of all the membrane modules, thereby reducing the blocking possibility of the membrane modules; the membrane structures with different properties are combined by changing the types of membrane components in the membrane structures, so that the membrane structure is suitable for different working occasions; and when one membrane component in the membrane structure is blocked, the membrane component is separated from other membrane components, and the membrane component is continuously used after being replaced by a new membrane component, so that the use cost is reduced.

In one embodiment, the membrane module further comprises at least one first sealing ring, the outer wall of the second pipe body is provided with at least one second groove arranged around the second pipe body, the first sealing ring is arranged in the second groove, and the first groove of one membrane module is in concave-convex fit with the second pipe body of the other membrane module and is in sealing fit with the second pipe body of the other membrane module through the first sealing ring.

According to the membrane module, the first groove of one membrane module and the second pipe body of the other membrane module are directly inserted together, the first groove and the second pipe body are in concave-convex fit, the assembly and disassembly are convenient and rapid, and the first groove and the second pipe body are in sealing fit through the first sealing ring so as to avoid the pollution of pure water.

In one embodiment, the first groove is a thread groove, and the outer side of the second pipe body is provided with an external thread matched with the first groove.

According to the membrane module, the first groove and the second pipe body are locked together through the threads, so that the first groove and the second pipe body can be conveniently and quickly assembled and disassembled, and the threads can be matched to play a sealing role, so that pure water is prevented from being polluted.

In one embodiment, the membrane element is a reverse osmosis membrane or a nanofiltration membrane.

The membrane module can combine membrane structures with different performances by expanding the selection range of the membrane element, and further can be suitable for different working occasions, such as domestic water purification or industrial water purification.

Additionally, the utility model also provides a filter core structure, include:

the shell is provided with a raw water port at one end along a first direction, and a waste water port and a pure water port at the other end;

the membrane modules are sequentially arranged in the shell along the first direction, the first groove of one membrane module in two adjacent membrane modules is detachably connected with the second pipe body of the other membrane module in a sealing fit mode, the central pipe of each membrane module is communicated with the pure water port, and the membrane modules are communicated with the waste water port.

In the filter element structure, the first groove of one membrane module is connected with the second pipe body of the other membrane module in a sealing fit manner, so that a plurality of membrane modules are superposed and combined to be suitable for shells with different sizes; the flux of the filter element structure is the sum of the fluxes of all membrane modules, so that the blocking possibility of the membrane modules is reduced; different performances are combined by the type of the membrane component, so that the membrane component is suitable for different working occasions; and when one membrane module is blocked, the membrane module is separated from other membrane modules, and the membrane module is continuously used after being replaced by a new membrane module, so that the use cost is reduced.

In one embodiment, at least one membrane module of the plurality of membrane modules has a membrane element that is different from the membrane elements of the remaining membrane modules.

According to the filter element structure, one membrane element has a fixed performance, and different performances can be combined by selecting membrane elements with different performances so as to expand the application range of the filter element structure.

In one embodiment, two adjacent membrane modules are oppositely arranged and form a first space which is directly communicated with the shell.

The filter element structure is directly communicated with the shell by limiting the first space, so that the membrane modules are connected in parallel, raw water passes through the membrane modules respectively, the utilization rate of the raw water is improved, the possibility that the raw water is discharged through the waste water outlet without being filtered is reduced, and the possibility of blocking of the membrane modules can be reduced.

In one embodiment, the filter element structure further comprises at least one connecting shell, wherein the connecting shell is a cavity structure with two open ends, and is sleeved and fixed at the end part of the membrane element opposite to the adjacent two membrane elements.

According to the filter element structure, the connecting shell is arranged on the two adjacent membrane modules, so that the membrane modules are connected in series, and wastewater obtained after raw water is filtered by the first membrane module is sequentially filtered by the subsequent membrane elements, so that the wastewater amount is reduced.

In one embodiment, the connecting shell is at least in sealing fit with a membrane element of the membrane module remote from the raw water port.

Above-mentioned filter core structure connects the shell and keeps away from former mouth of a river membrane module sealing fit through injecing to avoid waste water not follow-up filtering just through the possibility that the waste water mouth was discharged.

In one embodiment, the filter cartridge structure further comprises at least one second sealing ring, the inner wall of the end portion of the connecting shell is provided with at least one third groove arranged around the connecting shell, the second sealing ring is arranged in the third groove, and the connecting shell is in sealing fit with the membrane element of the membrane module through the second sealing ring.

According to the filter element structure, the second sealing ring is abutted between the connecting shell and the membrane element of the membrane assembly, so that the connecting shell is in sealing fit with the membrane assembly, and wastewater is prevented from overflowing between the connecting shell and the membrane assembly.

Drawings

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

FIG. 2 is a front view of the membrane module of FIG. 1;

FIG. 3 is a cross-sectional view of the membrane module of FIG. 2;

fig. 4 is a cross-sectional view of a filter cartridge arrangement according to an embodiment of the present invention;

FIG. 5 is a front view of a membrane module according to another embodiment of the present invention;

FIG. 6 is a cross-sectional view of the membrane module of FIG. 5;

FIG. 7 is an enlarged schematic view of the cartridge arrangement of FIG. 4 at position A;

fig. 8 is a cross-sectional view of a cartridge arrangement according to another embodiment of the present invention;

fig. 9 is a schematic view of water flow when membrane modules are connected in parallel according to an embodiment of the present invention;

fig. 10 is a schematic view of water flow when membrane modules are connected in series according to an embodiment of the present invention;

fig. 11 is an enlarged schematic view of the cartridge arrangement of fig. 4 at position B.

Reference numerals:

10. a filter element structure;

100. a membrane module; 110. a central tube; 111. a first pipe body; 1111. an exhaust port; 112. a second tube body; 1121. a second groove; 113. a third tube; 1131. a first groove; 120. a membrane element; 130. a first seal ring; 101. a first membrane module; 1011. a first membrane element; 102. a second membrane module; 1021. a second membrane element;

200. a housing; z, a first direction; 210. a raw water port; 220. a waste water port; 230. a pure water port; 250. an upper housing; 260. a lower housing;

300. a first space;

400. a connecting shell; 410. a third groove;

500. and a second seal ring.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of 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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical solution provided by the embodiments of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the present invention provides a membrane module 100 for filtering and dividing raw water flowing through the membrane module to form pure water and waste water. The membrane module 100 comprises a central tube 110 and a membrane element 120, the membrane element 120 is sleeved outside the central tube 110, and the membrane element 120 is fixedly connected with the central tube 110; in a specific arrangement, the membrane element 120 is composed of a reverse osmosis membrane, a filter screen, filter cloth and other structural members.

The central tube 110 is a tubular structure with two open ends, and includes three parts, namely a first tube 111, a second tube 112, and a third tube 113, the second tube 112 and the third tube 113 are located on two sides of the first tube 111, and the three parts, namely the first tube 111, the second tube 112, and the third tube 113, are integrally formed, so as to facilitate the preparation of the central tube 110. The first tube 111 is disposed in the membrane element 120, and the first tube 111 is provided with a plurality of collecting holes 1111, the collecting holes 1111 penetrate through a tube wall of the first tube 111, when the first tube is specifically disposed, the number of the collecting holes 1111 may be 10, 20, 30 or more than 30, the plurality of collecting holes 1111 may be uniformly distributed on the first tube 111, and pure water filtered by the membrane element 120 is collected into the first tube 111 through the collecting holes 1111.

When the membrane element 120 is fitted on the central tube 110, the second tube 112 protrudes from one end of the membrane element 120, the third tube 113 protrudes from the other end of the membrane element 120, the third tube 113 is provided with a first groove 1131, the first groove 1131 opens on an end surface of the third tube 113 away from the second tube 112 and extends for a certain distance towards the inside of the third tube 113, and the first groove 1131 is coaxially arranged with the first tube 111, so that the third tube 113 and the second tube 112 form a stepped groove.

When a plurality of membrane modules 100 are combined, the first groove 1131 of one membrane module 100 is detachably connected with the second pipe 112 of another membrane module 100, and with continuing reference to fig. 4, the first groove 1131 of the first membrane module 101 in two adjacent membrane modules 100 is detachably connected with the second pipe 112 of the second membrane module 102; when specifically setting up, the external diameter of second body 112 equals or slightly is less than the diameter of first recess 1131 to ensure the connection between second body 112 and the first recess 1131, and the mode that the two can be dismantled and connect can be unsmooth cooperation, threaded connection etc..

In the membrane module 100, raw water is filtered by the membrane element 120, pure water enters the central pipe 110, wastewater is discharged by the membrane element 120, the membrane module 100 is used as a universal monomer of a membrane structure to realize the filtration of the raw water, and when the membrane module 100 is combined, the first groove 1131 of one membrane module 100 is connected with the second pipe body 112 of another membrane module 100, so that a plurality of membrane modules 100 are superposed and combined to obtain the membrane structure with required size, and the membrane module can be suitable for shells 200 with different sizes, and at the moment, the flux of the membrane structure is the sum of the fluxes of all the membrane modules 100, thereby reducing the possibility of blockage of the membrane module 100; the membrane structures with different properties are combined by changing the types of the membrane assemblies 100 in the membrane structure, so that the membrane structure is suitable for different working occasions; and when one membrane module 100 in the membrane structure is blocked, the membrane module 100 is separated from other membrane modules 100, and a new membrane module 100 is replaced for subsequent use, so that the use cost is reduced.

In order to improve the sealing performance after the assembly of the membrane modules 100, as shown in fig. 5 and fig. 6, in a preferred embodiment, the membrane module 100 further includes at least one first sealing ring 130, at least one second groove 1121 is formed on an outer wall of the second tube 112, the second groove 1121 is disposed around the outer wall of the second tube 112, the first sealing ring 130 is disposed in the second groove 1121, and when the membrane module is specifically disposed, the number of the first sealing ring 130 corresponds to the number of the second groove 1121, which may be one, two, or more than two. When a plurality of membrane modules 100 are combined, the first groove 1131 of one membrane module 100 is in concave-convex fit with the second tube 112 of another membrane module 100, and the first groove 1131 of one membrane module 100 is in sealing fit with the second tube 112 of another membrane module 100 through the first sealing ring 130.

Referring to fig. 4 and 7, the second tube 112 of the second membrane module 102 is directly inserted into the first groove 1131 of the first membrane module 101, and at this time, the second tube 112 and the first groove 1131 are in concave-convex fit, so that the first membrane module 101 and the second membrane module 102 can be mounted conveniently and quickly, and only the first membrane module 101 needs to be taken down from the second membrane module 102 during dismounting, and the dismounting between the two is simple and convenient. When the second tube 112 of the two-membrane module 100 is directly inserted into the first groove 1131 of the first membrane module 101, the first sealing ring 130 is squeezed between the outer wall of the second tube 112 and the wall of the first groove 1131, so as to prevent wastewater from entering the central tube 110 through the space between the second tube 112 and the first groove 1131, thereby preventing pure water from being polluted, and simultaneously preventing pure water from flowing out from the space between the second tube 112 and the first groove 1131, thereby preventing pure water from being wasted.

The connection mode between the first groove 1131 and the second tube 112 is not limited to the combination of the above-mentioned concave-convex fit and the sealing ring, but also can be other forms that can meet the requirement, and in a preferred embodiment, the first groove 1131 is a threaded groove, and the outer side of the second tube 112 is provided with an external thread, and this external thread is matched with the first groove 1131, when a plurality of membrane modules 100 are combined, the first groove 1131 and the second tube 112 of two adjacent membrane modules 100 are locked together through the thread function between the external thread and the first groove 1131, so that the convenient assembly and disassembly and quick operation of two adjacent membrane modules 100 can be realized, and at this time, the thread fit between the external thread and the first groove 1131 can also play a sealing function, so as to prevent the wastewater from entering the central tube 110 through the space between the second tube 112 and the first groove 1131, so as to prevent the pure water from being polluted, and at the pure water from flowing out from the space between the second tube 112 and the first groove 1131, so as to avoid the pure water being wasted.

The membrane element 120 has various structural forms, and in a preferred embodiment, the membrane element 120 may be a reverse osmosis membrane, the membrane element 120 may also be a nanofiltration membrane, or may be in other forms capable of meeting the requirements of desalination rate, specific removal rate, effective material retention rate, and the like, so as to meet the water quality that the filtered water or the outlet water meets the requirements of healthy drinking water.

In the membrane module 100, by expanding the selection range of the membrane elements 120, when a plurality of membrane modules 100 are combined, different membrane elements 120 can be selected to be combined to form membrane structures with different performances, so that the filter element structure 10 with the membrane structure can be suitable for different working occasions, such as domestic water purification or industrial water purification. In the industrial membrane structure, the requirement of a large-flux product of the industrial membrane structure can be met through the existing simple superposition, and the industrial membrane structure can be suitable for the existing industrial equipment without changing production equipment or investing again, so that the production cost is reduced.

In addition, as shown in fig. 4 and fig. 8, the present invention further provides a filter element structure 10, which can be used for domestic water purification or industrial water purification, the filter element structure 10 includes a housing 200 and a plurality of membrane modules 100 according to any one of the above technical solutions, and the number of the membrane modules 100 may be two, three, four or more than four, wherein:

one end of the housing 200 along the first direction Z is provided with a raw water port 210, and the other end of the housing 200 is provided with a waste water port 220 and a pure water port 230; when specifically setting up, shell 200 can be the tubular structure, including last casing 250 and lower casing 260, go up casing 250 and lower casing 260 through mode detachably installation such as threaded connection, buckle connection together, former mouth of a river 210 sets up and is used for receiving raw water from the external world on last casing 250, waste water mouth 220 and pure water mouth 230 set up on casing 260 down, waste water mouth 220 is used for being connected with external waste water recovery device, pure water mouth 230 can be directly used for discharging pure water or be connected with pure water collection device.

The plurality of membrane modules 100 are sequentially arranged in the housing 200 along the first direction Z, and the first groove 1131 of one membrane module 100 of two adjacent membrane modules 100 is detachably connected and in sealing fit with the second tube 112 of the other membrane module 100, and referring to fig. 7 together, the second tube 112 of the second membrane module 102 is in concave-convex fit with the first groove 1131 of the first membrane module 101, and the first sealing ring 130 is squeezed between the outer wall of the second tube 112 and the groove wall of the first groove 1131. After the plurality of membrane modules 100 are combined, the plurality of central tubes 110 are in sealed communication with each other and are communicated with the pure water port 230, the membrane elements 120 of the membrane modules 100 are communicated with the waste water port 220, waste water flowing in from one ends of the membrane elements 120 is filtered by the membrane elements 120 to separate pure water and waste water, the pure water enters the central tubes 110 through the confluence holes 1111, and the waste water is discharged through the other ends of the membrane elements 120.

In the filter element structure 10, the first groove 1131 of one membrane module 100 is connected and hermetically fitted with the second pipe 112 of another membrane module 100, so that a plurality of membrane modules 100 are stacked and combined to be suitable for housings 200 of different sizes, at this time, raw water is filtered by the membrane element 120, pure water is collected in the first pipe 111 and then discharged through the pure water port 230, and wastewater is discharged by the membrane element 120 and discharged through the wastewater port 220; the flux of the filter element structure 10 is the sum of the fluxes of all the membrane modules 100, so that the blocking possibility of the membrane modules 100 is reduced; different performances are combined by the types of the membrane assemblies 100, so that the membrane assembly is suitable for different working occasions; and when one membrane module 100 is blocked, the membrane module 100 is separated from other membrane modules 100 and is replaced by a new membrane module 100 for subsequent use, so that the use cost is reduced.

In the filter element structure 10, one membrane element 120 has a fixed performance, a plurality of membrane elements 120 can have the same performance, and the flux is multiplied after the plurality of membrane elements 120 are stacked, although the performance is not changed. In order to obtain filter cartridge arrangements 10 with different performance, at least one membrane module 100 of the plurality of membrane modules 100 has membrane elements 120 that are different from membrane elements 120 of the remaining membrane modules 100. In a specific arrangement, after the N membrane modules 100 are combined, the N membrane elements 120 are provided, in the N membrane elements 120, N-1 properties are the same, and when the membrane elements 120 of one membrane module 100 are different from the N-1 properties, the filter element structures 10 with two properties can be obtained, and when the N membrane elements 120 are different from each other in properties, the filter element structures 10 with N properties can be obtained. By selecting membrane elements 120 with different properties, filter element arrangements 10 with different properties can be combined to expand the application range of the filter element arrangement 10.

As shown in fig. 8 and 9, in a preferred embodiment, two adjacent membrane modules 100 are oppositely arranged, and the two adjacent membrane modules 100 form a first space 300, the first space 300 is directly communicated with the housing 200, so that the plurality of membrane modules 100 are connected in parallel, raw water entering from the raw water port 210 firstly passes through the first membrane module 101 and is separated by the first membrane element 1011 in the first membrane module 101, pure water enters the central pipe 110 through the confluence hole 1111, wastewater is discharged through the other end of the first membrane element 1011, raw water then passes through the second membrane module 102 and is separated by the second membrane element 1021 in the second membrane module 102, pure water enters the central pipe 110 through the confluence hole 1111, wastewater is discharged through the other end of the second membrane element 1021, and is sequentially continued until the raw water is separated by the N-th membrane element 120, and the utilization rate of the raw water can be improved after the plurality of membrane modules 100 are connected in parallel, the possibility that the raw water is discharged through the wastewater port 220 without being filtered can be reduced, and the possibility of blocking of the membrane modules 100 can be reduced.

The structure of the filter element structure 10 has various structures, as shown in fig. 4 and fig. 11, in a preferred embodiment, the filter element structure 10 further includes at least one connecting shell 400, and the number of the connecting shells 400 corresponds to the number of the membrane modules 100, and may be one, two, or more than two. The connection shell 400 is a cavity structure with two open ends, the connection shell 400 is sleeved at the end parts of the membrane elements 120 opposite to the two adjacent membrane elements 100, and the connection shell 400 is fixedly connected with the end parts of the membrane elements 120 opposite to the two adjacent membrane elements 100, so that the plurality of membrane elements 100 are connected in series, raw water entering from the raw water port 210 firstly passes through the first membrane element 101 and is separated by the first membrane element 1011 in the first membrane element 101, pure water enters the central tube 110 through the confluence hole 1111, waste water is discharged onto the second membrane element 1021 through the other end of the first membrane element 1011, the waste water is discharged through the other end of the second membrane element 1021 after being continuously separated by the second membrane element 1021, and the waste water is sequentially and continuously separated and discharged through the N-th membrane element 120, thereby reducing the amount of waste water, and improving the utilization rate of raw water and the yield of pure water.

In order to further reduce the amount of wastewater, specifically, the connecting shell 400 is at least in sealing fit with the membrane elements 120 of the membrane module 100 far away from the raw water port 210, so as to prevent wastewater from overflowing between the connecting shell 400 and the membrane elements 120, thereby avoiding the possibility that wastewater is discharged through the wastewater port 220 without being subsequently filtered, reducing the amount of wastewater, and improving the utilization rate of raw water and the yield of pure water. In a specific arrangement, the connecting shell 400 can be only in sealing fit with the membrane element 120 of the membrane module 100 far away from the raw water port 210, and the connecting shell 400 can also be in sealing fit with the end parts of the membrane element 120 opposite to two adjacent membrane modules 100.

In order to facilitate the sealing engagement between the connection shell 400 and the membrane module 100, more specifically, the filter cartridge structure 10 further includes at least one second sealing ring 500, at least one third groove 410 is formed on an inner wall of an end portion of the connection shell 400, the third groove 410 is disposed around the inner wall of the end portion of the connection shell 400, the second sealing ring 500 is disposed in the third groove 410, and the connection shell 400 is in sealing engagement with the membrane element 120 of the membrane module 100 through the second sealing ring 500. In a specific arrangement, the number of the second sealing rings 500 corresponds to the number of the third grooves 410, and may be one, two, or more than two. When the connection shell 400 is sleeved on the end of the membrane element 120 of the membrane assembly 100, the second sealing ring 500 abuts between the connection shell 400 and the membrane element 120 to realize the sealing fit between the connection shell 400 and the membrane assembly 100 and avoid the overflow of wastewater between the connection shell 400 and the membrane assembly 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a membrane module which characterized in that, includes center tube and membrane element, wherein:

the membrane element is sleeved and fixed on the central tube;

the central tube is a tubular structure with two open ends, and comprises a first tube body, a second tube body and a third tube body, wherein the second tube body and the third tube body are arranged on two sides of the first tube body, the first tube body is arranged in the membrane element and is provided with a plurality of converging holes running through the tube wall of the first tube body, the second tube body and the third tube body respectively protrude out of two end parts of the membrane element, an end face opening of the third tube body is provided with a first groove, the first groove is coaxially arranged with the first tube body, and the first groove of the membrane assembly is detachably connected with the second tube body of the membrane assembly.

2. The membrane module according to claim 1, further comprising at least one first sealing ring, wherein the outer wall of the second tube body is provided with at least one second groove arranged around the second tube body, the first sealing ring is arranged in the second groove, and the first groove of one membrane module is in concave-convex fit with the second tube body of another membrane module and is in sealing fit with the second tube body through the first sealing ring.

3. The membrane module of claim 1, wherein the first groove is a threaded groove and the second tubular body is externally threaded to mate with the first groove.

4. The membrane module of claim 1, wherein the membrane element is a reverse osmosis membrane or a nanofiltration membrane.

5. A filter cartridge arrangement, comprising:

a housing having a raw water port at one end in a first direction and a waste water port and a purified water port at the other end;

a plurality of membrane modules according to any one of claims 1 to 4, wherein the membrane modules are sequentially arranged in the housing along the first direction, the first groove of one membrane module in two adjacent membrane modules is detachably connected with and in sealing fit with the second pipe of the other membrane module, the central pipe of the membrane module is communicated with the pure water port, and the membrane modules are communicated with the waste water port.

6. The filter cartridge arrangement of claim 5, wherein at least one of the membrane modules has a membrane element that is different from the membrane elements of the remaining membrane modules.

7. The filter cartridge arrangement of claim 5, wherein adjacent two of the membrane modules are oppositely disposed and form a first space in direct communication with the housing.

8. The filter element structure as claimed in claim 5, further comprising at least one connecting shell, wherein the connecting shell is a cavity structure with two open ends and is sleeved and fixed on the end part of the membrane element opposite to the adjacent two membrane components.

9. The filter cartridge arrangement of claim 8, wherein the connection housing is in sealing engagement with at least a membrane element of a membrane module distal to the raw water port.

10. The filter cartridge arrangement of claim 9, further comprising at least one second sealing ring, wherein the inner wall of the end portion of the connection housing defines at least one third groove disposed therearound, the second sealing ring is disposed in the third groove, and the connection housing is in sealing engagement with the membrane element of the membrane module via the second sealing ring.

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