CN112125426A - Composite filter element structure and water purification system - Google Patents

Abstract

The invention relates to a composite filter element structure and a water purification system. A second central tube of the composite filter element structure is sleeved outside the first central tube, a preposed filter element assembly is sleeved between the first central tube and the second central tube, a raw water cavity communicated with a raw water port is arranged between the preposed filter element assembly and the second central tube, and a preposed filter water cavity communicated with a preposed filter water port is arranged between the preposed filter element assembly and the first central tube; the membrane filtering component is sleeved between the second central pipe and the filter flask, a pressurized water cavity communicated with the pressurized water inlet is formed between the membrane filtering component and the second central pipe, a membrane filtering water cavity is formed between the membrane filtering component and the filter flask, and a concentrated water cavity communicated with the concentrated water inlet is formed in the membrane filtering component; a post water inlet cavity communicated with the membrane filtering water cavity is arranged between the post filter element component and the filter bottle, and a water purifying cavity communicated with the first central pipe is arranged in the center of the post filter element component. The composite filter element structure integrates a plurality of filter elements into one composite filter element, so that the volume of the filter element is reduced, and the number of the filter elements replaced by a user is reduced.

Description

Composite filter element structure and water purification system

Technical Field

The invention relates to the technical field of water treatment, in particular to a composite filter element structure and a water purification system.

Background

With the increasing attention on health concepts, people pay more attention to water safety, and therefore the water purifier is widely used. At present, in order to guarantee the filtering effect of a water purifier, a mode of connecting multiple stages of filter elements in series is generally adopted to gradually purify raw water. However, the above-mentioned filter element combination mode not only results in large occupied space of the multi-stage filter element, but also results in a problem of large core replacement quantity.

Disclosure of Invention

Based on the composite filter element structure and the water purification system, the composite filter element structure and the water purification system are provided aiming at the problems that a multi-stage filter element occupies a large space and the number of the replaced filter elements is large, a plurality of filter elements are integrated into one composite filter element, the size of the filter element is reduced, the number of the replaced filter elements of a user is reduced, and the user experience is improved.

A composite filter element arrangement comprising: the filter flask comprises a filter flask, and a front filter element assembly, a membrane filter assembly, a rear filter element assembly, a first central tube and a second central tube which are arranged in the filter flask;

the filter flask is provided with a separated original water port, a front filtering water port, a pressurizing water inlet, a clean water port and a concentrated water port, wherein the clean water port is communicated with the first central pipe;

the second central pipe is sleeved outside the first central pipe, the preposed filter element assembly is sleeved between the first central pipe and the second central pipe, a raw water cavity communicated with the raw water port is formed between the preposed filter element assembly and the second central pipe, and a preposed filtering water cavity communicated with the preposed filtering water port is formed between the preposed filter element assembly and the first central pipe;

the membrane filtering component is sleeved between the second central pipe and the filter flask, a pressurized water cavity communicated with the pressurized water inlet is formed between the membrane filtering component and the second central pipe, a membrane filtering water cavity is formed between the membrane filtering component and the filter flask, and a concentrated water cavity communicated with the concentrated water inlet is formed in the membrane filtering component;

the rear filter element assembly and the filter bottle are provided with a rear water inlet cavity communicated with the membrane filtering water cavity, and the center of the rear filter element assembly is provided with a purified water cavity communicated with the first central pipe.

In one embodiment, the raw water port, the pre-filter water port, the booster water inlet, the clean water port and the concentrate water port are located at the same end of the filter flask.

In one embodiment, the membrane filtration module comprises: the device comprises a support shell with a water outlet hole, a filtering membrane wound on the outer part of the support shell and a first adapter sleeve used for installing the filtering membrane at the concentrated water outlet hole;

the first end of the support shell is provided with a water flowing hole communicated with the water purifying cavity and the first central pipe and is connected with the first end of the front filter element component and the second end of the rear filter element component, and the second end of the support shell is provided with an opening and is installed at the pressurizing water inlet;

first adapter sleeve with have between the filtration membrane and constitute the clearance in dense water cavity, filtration membrane with have between the filter flask and constitute the clearance in membrane filtration water cavity, the support casing cover is located the outside of second center tube is in order to form and constitute the clearance in pressure boost water cavity.

In one embodiment, a first mounting part and a second mounting part communicated with the water flowing hole are arranged in the first end of the supporting shell, and the first mounting part surrounds the second mounting part;

the first mounting part is hermetically connected with the first end of the front filter element component;

the second installation portion is connected with the first end of the first central pipe in a sealing mode.

In one embodiment, the pre-filter cartridge assembly comprises: the filter comprises a front filter element, a first end cover and a second end cover;

the first end of the prepositive filter element is connected with the support shell and the first end of the second central pipe through the first end cover, and the second end of the prepositive filter element is arranged at the prepositive filter water port through the second end cover;

the gap between the inner wall of the preposed filter element and the first central tube is formed into the preposed water filtering cavity, and the gap between the outer wall of the preposed filter element and the second central tube is formed into the original water cavity.

In one embodiment, the first end cap comprises: the third mounting part and the fourth mounting part are communicated with each other;

the third installation department with support housing's first end sealing connection and still with the discharge orifice communicates with each other, the fourth installation department with second center tube sealing connection.

In one embodiment, a first limiting part is arranged in the fourth mounting part, and the first limiting part is communicated with the third mounting part;

the outer diameter of the first central pipe is approximately equal to the inner diameter of the first limiting part;

the first end of leading filter core install in the fourth installation department with between the first spacing portion.

In one embodiment, the front filter element comprises a carbon rod layer and a filter cotton layer which are sequentially stacked.

In one embodiment, the post-filter cartridge assembly comprises: the rear filter element, the third end cover and the second adapter sleeve;

the first end of the rear filter element is connected with the filter flask through the third end cover, and the second end of the rear filter element is connected with the first end of the support shell through the second adapter sleeve.

In one embodiment, a second limiting portion is disposed in the third end cap, and the first end of the rear filter element is mounted between the third end cap and the second limiting portion.

In one embodiment, a lap joint part is arranged in the second adapter sleeve, and the second end face of the rear filter element is lapped on the lap joint part;

a third limiting part is arranged on the wall of the overlapping part close to the third end cover, and the second end of the rear filter element is arranged between the second adapter sleeve and the third limiting part;

the wall that the overlap joint portion kept away from the third end cover is provided with the fifth installation department, the fifth installation department with the first end of supporting the casing is connected.

In one embodiment, the post-filter element is a carbon rod.

A water purification system, the water purification system includes above-mentioned arbitrary compound filter core structure.

Above-mentioned composite filter element structure and water purification system adopt the design of side flow membrane technology composite filter element, with a plurality of filter cores integrated to a composite filter element in, reduce the filter core volume, reduce the user and trade core quantity, improve user experience. The front filter element assembly in the composite filter element structure is communicated with a water inlet of supercharging equipment (such as a water pump) through a front filter water inlet on a filter flask, and can be used for carrying out primary filtration on raw water, so that the influence of pollution of large particles on the supercharging equipment on the service life of the supercharging equipment is prevented; the membrane filtration assembly in the composite filter element structure is communicated with the water outlet of the supercharging equipment through the supercharging water inlet on the filter flask, so that the supercharging equipment can directly pressurize the membrane filtration assembly, and the pressure loss of the membrane filtration assembly is smaller.

Drawings

FIG. 1 is an exploded view of a composite filter element according to one embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a composite filter element according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a water purification system according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a membrane filtration module according to one embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a first end of a composite filter element according to an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of a pre-filter assembly according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a post-filter assembly according to an embodiment of the invention.

Wherein the reference numerals in the drawings are as follows:

100. a composite filter element structure; 110. a filter flask; 110a, a raw water port; 110b, a front filtering water gap; 110c, a pressurized water inlet; 110d, a water purifying port; 110e, a dense water gap; 111. a filter flask main body; 112. a cover body; 120. a pre-filter element assembly; 121. a front filter element; 1211. a carbon rod layer; 1212. a filter cotton layer; 122. a first end cap; 1221. a third mounting portion; 1222. a fourth mounting portion; 1223. a first limiting part; 123. a second end cap; 130. a membrane filtration module; 131. a support housing; 131a and a water outlet hole; 131b, a water flowing hole; 1311. a first mounting portion; 1312. a second mounting portion; 132. a filtration membrane; 133. a first adaptor sleeve; 140. a post-filter element assembly; 141. a post-positioned filter element; 142. a third end cap; 1421. a second limiting part; 143. a second adaptor sleeve; 1431. a lap joint section; 1432. a third limiting part; 1433. a fifth mounting portion; 150. a first center tube; 160. a second center tube; q1, raw water cavity; q2, a front filter water cavity; q3, a pressurized water cavity; q4, a membrane filtration water cavity; q5, concentrated water cavity; q6, a rear water inlet cavity; q7, a water purifying cavity; 200. a raw water pipeline; 300. a pressure boosting device; 400. water using equipment; 500. a waste water line; 600. a water-through electromagnetic valve; 700. a one-way valve; 800. a pressure switch; 900. waste water solenoid valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the 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 such 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," "secured," and the like are to be construed broadly and can, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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.

Referring to fig. 1, fig. 1 is an exploded view of a composite filter element assembly 100 according to an embodiment of the present invention, which provides a composite filter element assembly 100 including a filter flask 110, and a front filter element assembly 120, a membrane filter assembly 130, a rear filter element assembly 140, a first center tube 150, and a second center tube 160 disposed in the filter flask 110. As shown in fig. 2, the filter flask 110 has a raw water port 110a, a pre-filter water port 110b, a pressurized water inlet 110c, a clean water port 110d and a concentrate water port 110e, which are isolated from each other, wherein the clean water port 110d is communicated with the first central tube 150; the second central pipe 160 is sleeved outside the first central pipe 150, the pre-filter element assembly 120 is sleeved between the first central pipe 150 and the second central pipe 160, a raw water cavity Q1 communicated with the raw water port 110a is arranged between the pre-filter element assembly 120 and the second central pipe 160, and a pre-filter water cavity Q2 communicated with the pre-filter water port 110b is arranged between the pre-filter element assembly 120 and the first central pipe 150; the membrane filtering component 130 is sleeved between the second central pipe 160 and the filter bottle 110, a pressurized water cavity Q3 communicated with the pressurized water inlet 110c is arranged between the membrane filtering component 130 and the second central pipe 160, a membrane filtering water cavity Q4 is arranged between the membrane filtering component 130 and the filter bottle 110, and a concentrated water cavity Q5 communicated with the concentrated water inlet 110e is arranged in the membrane filtering component 130; a rear water inlet cavity Q6 communicated with the membrane filtering water cavity Q4 is arranged between the rear filter element assembly 140 and the filter bottle 110, and a purified water cavity Q7 communicated with the first central tube 150 is arranged in the center of the rear filter element assembly 140.

It can be understood that the raw water cavity Q1, the pre-filter water cavity Q2, the pressurized water cavity Q3, the membrane filter water cavity Q4, the concentrated water cavity Q5 and the purified water cavity Q7 are not communicated with each other, i.e. no water flow gap exists.

The operation of composite filter element arrangement 100 as described above is described as follows:

in application, as shown in fig. 3, the raw water port 110a of the composite filter element structure 100 is first communicated with the raw water pipeline 200, the pre-filtering water port 110b is communicated with a water inlet of the pressurizing device 300 (e.g., a water pump), the pressurizing water inlet 110c is communicated with a water outlet of the pressurizing device 300, the clean water port 110d is communicated with the water using device 400 (e.g., a water tap), and the concentrated water port 110e is communicated with the waste water pipeline 500. Wherein, a water-through electromagnetic valve 600 is communicated between the preposed filtering water port 110b and the water inlet of the supercharging device 300, a one-way valve 700 and a pressure switch 800 are communicated between the water purifying water port 110d and the water using device 400, and a wastewater electromagnetic valve 900 is installed on the wastewater pipeline 500.

Raw water in the raw water line 200 flows into the raw water chamber Q1 in the composite filter element structure 100 through the raw water port 110a of the filter bottle 110, then flows laterally through the pre-filter element assembly 120, and primary filtered water primarily filtered by the pre-filter element assembly 120 flows into the pre-filtered water chamber Q2. The primary filtered water flows out through the preposed filtering water port 110b on the filter bottle 110 and flows into the pressurizing device 300 for pressurizing, the pressurized primary filtered water flows into the pressurizing water cavity Q3 inside the composite filter element structure 100 through the pressurizing water inlet 110c on the filter bottle 110, flows through the membrane filtering component 130 laterally, the concentrated water filtered by the membrane filtering component 130 flows into the concentrated water cavity Q5, and then is discharged into the waste water pipeline 500 through the concentrated water port 110e on the filter bottle 110; meanwhile, the pure water (i.e., the secondary filtered water) filtered by the membrane filter assembly 130 flows into the membrane filter water chamber Q4, then flows into the rear water inlet chamber Q6, flows laterally through the rear filter element assembly 140, and the pure water (i.e., the tertiary filtered water) filtered by the rear filter element assembly 140 flows into the pure water chamber Q7, and then flows into the water consuming apparatus 400 through the first central tube 150 and through the pure water port 110d of the filter bottle 110.

As described above, the composite filter element structure 100 adopts the design of the side flow membrane technology composite filter element, and integrates a plurality of filter elements into one composite filter element, thereby reducing the size of the filter element, reducing the number of filter elements replaced by a user, and improving the user experience. The front filter element assembly 120 in the composite filter element structure 100 is communicated with a water inlet of the supercharging device 300 (such as a water pump) through a front filter water gap 110b on the filter bottle 110, and the front filter element assembly 120 can be used for primary filtering of raw water, so that the pollution of large particles to the supercharging device 300 is prevented from influencing the service life of the supercharging device 300; the membrane filtration module 130 in the composite filter element structure 100 is communicated with the water outlet of the pressurization device 300 through the pressurization water inlet 110c on the filter bottle 110, so that the pressurization device 300 can directly pressurize the membrane filtration module 130, and the pressure loss of the membrane filtration module 130 is smaller.

In some embodiments of the present invention, the raw water port 110a, the pre-filter water port 110b, the pressurized water inlet 110c, the clean water port 110d, and the concentrate water port 110e are located at the same end of the filter flask 110. So, can do benefit to arranging of each pipeline that is linked together with composite filter element structure 100, avoid the pipeline to lead to the pipeline to be unfavorable for the phenomenon of overhauing to produce because of arranging the confusion. Illustratively, as shown in fig. 2, the raw water port 110a, the pre-filter water port 110b, the pressurized water inlet port 110c, the clean water port 110d, and the rich water port 110e are located at the bottom of the filter flask 110. Correspondingly, the rear filter cartridge assembly 140 may be disposed on top of the filter bottle 110.

In some embodiments of the present invention, as shown in fig. 4, the membrane filtration module 130 comprises: a support housing 131 having a water outlet hole 131a, a filtering membrane 132 wound on the outside of the support housing 131, and a first adaptor sleeve 133 for mounting the filtering membrane 132 at the concentrate port 110 e; as shown in fig. 2, the first end of the support housing 131 has a water flow hole 131b communicating with the clean water chamber Q7 and the first center pipe 150 and is connected to the first end of the front filter element assembly 120 and the second end of the rear filter element assembly 140, and the second end of the support housing 131 has an opening and is installed at the pressurized water inlet 110 c; a gap forming the concentrate chamber Q5 is formed between the first adapter sleeve 133 and the filter membrane 132, a gap forming the membrane filter water chamber Q4 is formed between the filter membrane 132 and the filter bottle 110, and the support housing 131 is sleeved outside the second center tube 160 to form a gap forming the pressurized water chamber Q3. Illustratively, the first ends of the support housing 131, the first center tube 150, the front filter element assembly 120, and the rear filter element assembly 140 are referred to as upper ends, and the second end of the support housing 131 is referred to as a lower end. It should be noted that the water outlet hole 131a is formed in the side surface of the support housing 131, and is used for allowing water in the pressurized water chamber Q3 to flow to the filtering membrane 132; the water flow hole 131b is provided in the first end surface of the support case 131 to allow water in the clean water chamber Q7 to flow into the first center pipe 150.

Wherein, the first end of the supporting shell 131 is connected with the first end of the first central tube 150 in a sealing way, and water channeling in the water cavities of the water purifying cavity Q7 and the pre-filtering water cavity Q2 is avoided. Specifically, at least one sealing member is disposed between the first end of the support housing 131 and the first end of the first center tube 150, and the sealing members are spaced apart along the length direction of the first center tube 150. In order to facilitate the sealing connection between the first center pipe 150 and the second center pipe, as shown in fig. 4 and 5, a second mounting portion 1312 communicating with the water flow hole 131b is provided in the support case 131, and the second mounting portion 1312 is sealingly connected to the first end of the first center pipe 150. Illustratively, a sealing member is mounted in a mounting groove on an outer wall of the first end of the first center tube 150, the sealing member being a sealing rubber ring. Similarly, to avoid water channeling in the water chambers of the pre-filter water chamber Q2 and the tube cavity of the first central tube 150, at least one sealing member is disposed between the second end of the first central tube 150 and the wall of the pre-filter water gap 110b, and the sealing members are spaced along the length of the first central tube 150. Illustratively, a sealing member is mounted in a mounting groove on the outer wall of the second end of the first center tube 150, the sealing member being a rubber sealing ring.

Similarly, the first end of the support housing 131 is also sealingly connected to the first end of the pre-filter element assembly 120 to prevent water channeling from the pressurized water chamber Q3 and the pre-filter water chamber Q2. Specifically, at least one sealing member is disposed between the first end of the support housing 131 and the front filter element assembly 120, and the sealing members are spaced apart along the length of the support housing 131. To facilitate the sealing connection between the two, as shown in fig. 4 and 5, a first mounting portion 1311 is provided in the first end of the support housing 131, the first mounting portion 1311 surrounds the second mounting portion 1312, and the first mounting portion 1311 is sealingly connected to the first end of the front filter element assembly 120. Illustratively, the seal may be a sealing rubber ring, which is mounted in a mounting groove on the outer wall of the pre-cartridge assembly 120.

Similarly, the first end of the support housing 131 is also sealingly connected to the rear filter element assembly 140 to prevent water channeling between the membrane filtration water chamber Q4 and the clean water chamber Q7. Specifically, at least one sealing member is disposed between the first end of the support housing 131 and the rear filter element assembly 140, and the sealing members are spaced apart along the length of the support housing 131. Illustratively, the sealing member is mounted in a mounting groove on an outer wall of the first end of the support housing 131. It will be appreciated that the first end of the support housing 131 projects outside of the filter membrane 132.

Similarly, the second end of the supporting housing 131 is also connected with the wall of the pressurized water inlet 110c of the filter flask 110 in a sealing manner, so as to avoid water channeling in the two water chambers, i.e., the concentrate chamber Q5 and the pressurized water chamber Q3. Specifically, at least one sealing member is disposed between the second end of the supporting housing 131 and the wall of the pressurized water inlet 110c, and the sealing members are spaced along the length direction of the supporting housing 131. Illustratively, the sealing member is mounted in a mounting groove on an outer wall of the second end of the support housing 131. It will be appreciated that the second end of support housing 131 projects outside of filter membrane 132.

Similarly, the second end of the first adapter sleeve 133 is also connected with the wall of the concentrate outlet 110e of the filter flask 110 in a sealing manner, so as to avoid water channeling in two water chambers, namely the concentrate chamber Q5 and the membrane filtration water chamber Q4. Specifically, at least one sealing member is disposed between the second end of the first adapter sleeve 133 and the wall of the concentrate inlet 110e, and the sealing members are distributed at intervals along the length direction of the first adapter sleeve 133. Illustratively, the seal is mounted in a mounting groove in the outer wall of the second end of the first adaptor sleeve 133. Wherein the second end of the first adaptor sleeve 133 is referred to as the lower end.

Optionally, the filtering membrane 132 is a membrane filtering layer such as a reverse osmosis membrane or a nanofiltration membrane. Wherein the filtering membrane 132 is connected with the inner wall of the first end of the first adaptor sleeve 133 by means of adhesion. In order to avoid water in the water chambers Q4 and Q5 from flowing, water sealing members (e.g., silica gel members) are disposed on the outer walls of the two ends of the filtering membrane 132 and the first end of the first adapter sleeve 133 for sealing.

In the case of the membrane filter assembly 130 based on the above structure, in some embodiments of the present invention, as shown in fig. 2 and 6, the prefilter assembly 120 includes: a front cartridge 121, a first end cap 122, and a second end cap 123; a first end of the front filter element 121 is connected with the support shell 131 and a first end of the second central tube 160 through the first end cover 122, and a second end of the front filter element 121 is installed at the front filtering water gap 110b through the second end cover 123; a gap for forming a pre-filtering water cavity Q2 is formed between the inner wall of the pre-filter element 121 and the first central tube 150, and a gap for forming a raw water cavity Q1 is formed between the outer wall of the pre-filter element 121 and the second central tube 160.

In some embodiments of the present invention, as shown in fig. 5, first end cap 122 includes: a third mounting portion 1221 and a fourth mounting portion 1222 communicating with each other; the third mounting portion 1221 is sealingly connected to the first end of the support housing 131 and also communicates with the water flow hole 131b, and the fourth mounting portion 1222 is sealingly connected to the second center pipe 160.

As an example, as shown in fig. 5, the third mounting part 1221 is sealingly coupled to the first mounting part 1311 of the support case 131 by a sealing member mounted in a mounting groove on an outer wall of the third mounting part 1221. Wherein an outer diameter of the first mounting portion 1311 is smaller than an outer diameter of the second mounting portion 1312.

Optionally, at least one sealing element is disposed between the fourth mounting portion 1222 and the second center tube 160, and the sealing elements are spaced apart along the length of the second center tube 160. In this manner, the fourth mounting portion 1222 may be sealingly coupled to the second center tube 160. Illustratively, a sealing member is mounted in a mounting groove on an outer wall of the fourth mounting portion 1222, the sealing member being a rubber sealing ring.

Alternatively, the second end cap 123 and the first adapter sleeve 133 may have the same structure, and both the inner and outer diameters of the first end are larger than those of the second end. The first ends of the second end cap 123 and the first adapter sleeve 133 are referred to as upper ends, and correspondingly, the second ends are referred to as lower ends. A first end of the second end cap 123 is connected to the front filter element 121, and a second end of the second end cap 123 is sealingly connected to the front filtering nozzle 110 b. Specifically, at least one sealing member is disposed between the second end of the second end cap 123 and the wall of the front filtering nozzle 110b, and the sealing members are spaced along the length direction of the second end cap 123. Illustratively, a sealing member is mounted in a mounting groove on the outer wall of the second end cap 123, the sealing member being a rubber sealing ring.

Further, in some embodiments of the present invention, as shown in fig. 5 and 6, a first limiting portion 1223 is disposed in the fourth mounting portion 1222, and the first limiting portion 1223 is communicated with the third mounting portion 1221; the middle outer diameter of the first center tube 150 is approximately equal to the inner diameter of the first stopper 1223; the first end of the front filter element 121 is mounted between the fourth mounting portion 1222 and the first stopper 1223. The first end of the first central tube 150 passes through the first limiting part 1223 to be abutted against the first end of the support housing 131, and the first limiting part 1223 can limit the first central tube 150 in the radial direction, so that the first central tube 150 is prevented from shaking; in addition, the first stopper 1223 may also radially limit the position of the front filter element 121, so as to prevent the front filter element 121 from shaking, and when the first end of the front filter element 121 is fixed between the fourth mounting portion 1222 and the first stopper 1223 by bonding, the firmness of the first stopper 1223 may be increased.

Specifically, in some embodiments of the present invention, as shown in fig. 6, the front filter element 121 includes a carbon rod 1211 and a filter cotton layer 1212 stacked in sequence. The preposed filter element 121 with the structure can effectively reduce the turbidity of water, intercept impurities such as silt, rust and suspended matters in the water and effectively remove residual chlorine, heterochrosis, peculiar smell and micromolecule organic matters in the water. As an example, a filter cotton layer 1212 is disposed on the exterior of the carbon rod 1211. The material of the filter cotton layer 1212 may be PP (polypropylene) cotton.

In the case of the membrane filter assembly 130 based on the above structure, in some embodiments of the present invention, as shown in fig. 2 and 7, the post-filter assembly 140 includes: a rear filter element 141, a third end cover 142 and a second adapter sleeve 143; the first end of the rear filter element 141 is connected to the filter bottle 110 through the third end cap 142, and the second end of the rear filter element 141 is connected to the first end of the support housing 131 through the second adapter sleeve 143. It can be understood that a gap is formed between the third end cap 142 and the second adapter sleeve 143, and pure water in the membrane filtering water cavity Q4 can flow into the pure water cavity Q7 through the gap and be filtered by the post-filter element 141. Illustratively, the first end of the rear filter element 141 is referred to as an upper end and the second end is referred to as a lower end.

Alternatively, as shown in fig. 1, 2 and 5, the filter flask 110 includes: the filter flask comprises a filter flask main body 111 and a bottle cap 112 covering the filter flask main body 111, wherein a front filter element assembly 120, a membrane filter assembly 130, a rear filter element assembly 140, a first central tube 150 and a second central tube 160 are arranged in a containing cavity formed between the filter flask main body 111 and the bottle cap 112. The bottle cap 112 is connected with the filter bottle main body 111 and the third end cap 142 in a snap-fit manner.

Further, in some embodiments of the present invention, as shown in fig. 5 and 7, a second position-limiting portion 1421 is disposed in the third end cap 142, and the first end of the rear filter element 141 is installed between the third end cap 142 and the second position-limiting portion 1421. The second limiting part 1421 is used to limit the first end of the rear filter element 141 in the radial direction of the first central tube 150, so as to prevent the first end of the rear filter element 141 from shaking. The first end of the rear filter element 141 may be adhered to an inner wall of the third end cap 142 facing the second adapter sleeve 143.

Further, in some embodiments of the present invention, as shown in fig. 5 and 7, a lap 1431 is disposed in the second adapting sleeve 143, and the second end face of the rear filter element 141 is lapped on the lap 1431; a third limit part 1432 is arranged on the wall of the overlapping part 1431 close to the third end cover 142, and the second end of the rear filter element 141 is installed between the second adapter sleeve 143 and the third limit part 1432; a fifth mounting portion 1433 is provided on a wall of the overlapping portion 1431 away from the third cap 142, and the fifth mounting portion 1433 is connected to the first end of the support housing 131. The third limit part 1432 is used to limit the second end of the rear filter element 141 in the radial direction of the first central tube 150, so as to prevent the second end of the rear filter element 141 from shaking. The second end of the rear filter element 141 may be bonded to an inner wall of the third adapter sleeve facing the third end cap 142. The fifth mounting portion 1433 may achieve a sealing connection with the first end of the support housing 131 using a sealing member.

In some embodiments of the present invention, the post-filter element 141 is a carbon rod. It will be appreciated that the carbon rod has an inner cavity in its center, which communicates with the first center tube 150 through the water flow hole 131b of the support case 131. The post-positioned carbon rod can effectively improve the taste of water quality and further improve the user experience besides enabling the water quality to be cleaner.

Another embodiment of the present invention provides a water purification system, which includes the composite filter element structure 100 as described above.

As an example, as shown in fig. 3, the raw water port 110a of the composite filter element structure 100 is communicated with the raw water line 200, the pre-filtering water port 110b is communicated with the water inlet of the pressurizing device 300, the pressurizing water inlet 110c is communicated with the water outlet of the pressurizing device 300, the clean water port 110d is communicated with the water using device 400, and the rich water port 110e is communicated with the waste water line 500.

As described above, the composite filter element structure 100 adopts the design of the side flow membrane technology composite filter element, and integrates a plurality of filter elements into one composite filter element, thereby reducing the size of the filter element, reducing the number of the filter elements replaced by users, and improving the user experience. The front filter element assembly 120 in the composite filter element structure 100 is communicated with a water inlet of the supercharging device 300 (such as a water pump) through a front filter water gap 110b on the filter bottle 110, and the front filter element assembly 120 can be used for primary filtering of raw water, so that the pollution of large particles to the supercharging device 300 is prevented from influencing the service life of the supercharging device 300; the membrane filtration module 130 in the composite filter element structure 100 is communicated with the water outlet of the pressurization device 300 through the pressurization water inlet 110c on the filter bottle 110, so that the pressurization device 300 can directly pressurize the membrane filtration module 130, and the pressure loss of the membrane filtration module 130 is smaller.

In some embodiments of the present invention, as shown in fig. 3, a water passing solenoid valve 600 is communicated between the pre-filtering water port 110b and the water inlet of the pressure boosting device 300, a check valve 700 and a pressure switch 800 are communicated between the water purifying water port 110d and the water using device 400, and a waste water solenoid valve 900 is installed on the waste water pipeline 500.

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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (13)

1. A composite filter element construction, comprising: the filter flask comprises a filter flask, and a front filter element assembly, a membrane filter assembly, a rear filter element assembly, a first central tube and a second central tube which are arranged in the filter flask;

the filter flask is provided with a separated original water port, a front filtering water port, a pressurizing water inlet, a clean water port and a concentrated water port, wherein the clean water port is communicated with the first central pipe;

the second central pipe is sleeved outside the first central pipe, the preposed filter element assembly is sleeved between the first central pipe and the second central pipe, a raw water cavity communicated with the raw water port is formed between the preposed filter element assembly and the second central pipe, and a preposed filtering water cavity communicated with the preposed filtering water port is formed between the preposed filter element assembly and the first central pipe;

the membrane filtering component is sleeved between the second central pipe and the filter flask, a pressurized water cavity communicated with the pressurized water inlet is formed between the membrane filtering component and the second central pipe, a membrane filtering water cavity is formed between the membrane filtering component and the filter flask, and a concentrated water cavity communicated with the concentrated water inlet is formed in the membrane filtering component;

the rear filter element assembly and the filter bottle are provided with a rear water inlet cavity communicated with the membrane filtering water cavity, and the center of the rear filter element assembly is provided with a purified water cavity communicated with the first central pipe.

2. The composite filter element arrangement according to claim 1, wherein the raw water port, the pre-filter water port, the booster water inlet, the clean water port and the concentrate water port are located at the same end of the filter flask.

3. The composite filter element arrangement according to claim 1 or 2, wherein the membrane filtration assembly comprises: the device comprises a support shell with a water outlet hole, a filtering membrane wound on the outer part of the support shell and a first adapter sleeve used for installing the filtering membrane at the concentrated water outlet hole;

the first end of the support shell is provided with a water flowing hole communicated with the water purifying cavity and the first central pipe and is connected with the first end of the front filter element component and the second end of the rear filter element component, and the second end of the support shell is provided with an opening and is installed at the pressurizing water inlet;

first adapter sleeve with have between the filtration membrane and constitute the clearance in dense water cavity, filtration membrane with have between the filter flask and constitute the clearance in membrane filtration water cavity, the support casing cover is located the outside of second center tube is in order to form and constitute the clearance in pressure boost water cavity.

4. The composite filter element arrangement according to claim 3 wherein a first mounting portion and a second mounting portion in communication with said flow bore are provided in said first end of said support housing, said first mounting portion surrounding said second mounting portion;

the first mounting part is hermetically connected with the first end of the front filter element component;

the second installation portion is connected with the first end of the first central pipe in a sealing mode.

5. The composite filter element arrangement of claim 3, wherein the pre-filter element assembly comprises: the filter comprises a front filter element, a first end cover and a second end cover;

the first end of the prepositive filter element is connected with the support shell and the first end of the second central pipe through the first end cover, and the second end of the prepositive filter element is arranged at the prepositive filter water port through the second end cover;

the gap between the inner wall of the preposed filter element and the first central tube is formed into the preposed water filtering cavity, and the gap between the outer wall of the preposed filter element and the second central tube is formed into the original water cavity.

6. The composite filter element arrangement of claim 5, wherein the first end cap comprises: the third mounting part and the fourth mounting part are communicated with each other;

the third installation department with support housing's first end sealing connection and still with the discharge orifice communicates with each other, the fourth installation department with second center tube sealing connection.

7. The composite filter element arrangement according to claim 6, wherein a first limiting portion is provided within the fourth mounting portion, the first limiting portion being in communication with the third mounting portion;

the outer diameter of the first central pipe is approximately equal to the inner diameter of the first limiting part;

the first end of leading filter core install in the fourth installation department with between the first spacing portion.

8. The composite filter element arrangement according to claim 5, wherein the pre-filter element comprises a carbon rod layer and a filter cotton layer stacked in sequence.

9. The composite filter element arrangement of claim 3, wherein the post-filter element assembly comprises: the rear filter element, the third end cover and the second adapter sleeve;

the first end of the rear filter element is connected with the filter flask through the third end cover, and the second end of the rear filter element is connected with the first end of the support shell through the second adapter sleeve.

10. The composite filter element arrangement according to claim 9 wherein a second limiting portion is provided within the third end cap, the first end of the post-filter element being mounted between the third end cap and the second limiting portion.

11. The composite filter element arrangement according to claim 9 wherein a lap joint is provided in said second adapter sleeve, and a second end face of said post-filter element is lapped over said lap joint;

a third limiting part is arranged on the wall of the overlapping part close to the third end cover, and the second end of the rear filter element is arranged between the second adapter sleeve and the third limiting part;

the wall that the overlap joint portion kept away from the third end cover is provided with the fifth installation department, the fifth installation department with the first end of supporting the casing is connected.

12. The composite filter element arrangement of claim 11, wherein the post-filter element is a carbon rod.

13. A water purification system, comprising the composite filter element arrangement of any one of claims 1-12.

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