CN218539370U

CN218539370U - Filter element and filter device

Info

Publication number: CN218539370U
Application number: CN202221672357.0U
Authority: CN
Inventors: 刘果; 刘小菡
Original assignee: Nanjing Hanshu Environmental Protection Equipment Co ltd
Current assignee: Nanjing Hanshu Environmental Protection Equipment Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-02-28
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a filter element and filter equipment, this filter element includes: the filter body component comprises a plurality of filter membranes which are straightly superposed, each filter membrane comprises two opposite membranes, a straight purified water flow passage is defined between the two membranes of each filter membrane, and a straight concentrated water flow passage is defined between every two adjacent filter membranes; constructing a purified water outlet on at least one side edge of the filtering main body component by closing the edge of the concentrated water flow channel corresponding to the side edge and opening the edge of the purified water flow channel; the other two sides of the filtering main body component respectively construct a raw water inlet and a concentrated water outlet by sealing the edges of the purified water flow passages corresponding to the two sides and opening the edges of the purified water flow passages; a sheet member disposed in the purified water flow passage and the concentrated water flow passage; the side of the filtering main body component corresponding to the purified water outlet is connected to the packaging component, and the packaging component is used for forming a purified water collecting cavity communicated with the purified water outlet.

Description

Filter element and filter device

Technical Field

The utility model relates to a water purification technology field especially relates to a filter element and filter equipment.

Background

In the prior art, a filter device for preparing purified water includes a housing and a filter element disposed in the housing, and the filter element is generally formed by rolling a plurality of filter membranes.

However, the rolled structure of the filter element has the following drawbacks:

1. the generated throttle pressure between the purified water outlet and the concentrated water outlet and the raw water inlet is large (i.e., the water is subjected to a large resistance), resulting in low filtration efficiency.

2. The diffusion effect of the solute of the concentrate in the concentrate flow passage defined between the filter membranes is poor, especially when the flow rate and flow rate of the concentrate are low (for example, when the pressure of raw water from a water pipe is low and/or the discharge amount of the concentrate outlet discharge is small, resulting in low flow rate and flow rate of the concentrate).

3. The diffusion effect of the concentrated water in the concentrated water flow channel is poor, the flow of the concentrated water is low and the like, so that solute particles are easy to attach to the membrane, the membrane filtering piece is quickly polluted, and the filtering element needs to be frequently cleaned or replaced.

4. The diffusion effect of the concentrated water in the concentrated water flow channel is poor, the flow rate of the concentrated water is low and the like, so that the concentrated water flowing out of different areas of the concentrated water outlet and the concentrated water flowing out of the concentrated water outlet successively have different solute concentrations, the real-time measurement result of the concentrated water outlet on the concentration (solute-containing concentration) of the concentrated water cannot truly reflect the total concentration of the concentrated water, and the significance of the measurement result is lost.

SUMMERY OF THE UTILITY MODEL

To the above technical problem that exists among the prior art, the embodiment of the utility model provides a filter element and filter equipment.

In order to solve the technical problem, the embodiment of the utility model adopts the following technical scheme:

a filter element, comprising:

the filter body component comprises a plurality of filter membranes which are straightly superposed, each filter membrane comprises two opposite membranes, a straight purified water flow passage is defined between the two membranes of each filter membrane, and a straight concentrated water flow passage is defined between every two adjacent filter membranes; constructing a purified water outlet on at least one side edge of the filtering main body component by closing the edge of the concentrated water flow channel corresponding to the side edge and opening the edge of the purified water flow channel; the other two sides of the filtering main body component respectively construct a raw water inlet and a concentrated water outlet by closing the edges of the purified water flow passages corresponding to the two sides and opening the edges of the concentrated water flow passages;

a sheet member arranged in the purified water flow passage and the concentrated water flow passage for maintaining a flow passage width;

and the side edge of the filtering main body component corresponding to the purified water outlet is connected to the packaging component, and the packaging component is used for forming a purified water collecting cavity communicated with the purified water outlet.

Preferably, the packaging part is a hollow structure, and the hollow structure is used as the clean water collecting cavity.

Preferably, the packaging part is a plate-shaped structure, and one side of the packaging part, which is back to the filter body part, and the shell of the filter device enclose the purified water collecting cavity.

The utility model also discloses a filter equipment, include:

a housing;

a filter element mounted in the housing; wherein:

the filter element comprises a filter main body component, a sheet component and an encapsulation component;

the filter body component comprises a plurality of filter membranes which are stacked flatly, each filter membrane comprises two opposite membranes, a flat purified water flow passage is defined between the two membranes of each filter membrane, and a flat concentrated water flow passage is defined between every two adjacent filter membranes; constructing a purified water outlet on at least one side edge of the filtering main body component by closing the edge of the concentrated water flow channel corresponding to the side edge and opening the edge of the purified water flow channel; the other two sides of the filtering main body component respectively construct a raw water inlet and a concentrated water outlet by closing the edges of the purified water flow passages corresponding to the two sides and opening the edges of the concentrated water flow passages;

a sheet member is arranged in the purified water flow passage and the concentrated water flow passage for maintaining a flow passage width;

the side edge of the filtering main body component corresponding to the purified water outlet is connected to the packaging component, and the packaging component is used for forming a purified water collecting cavity communicated with the purified water outlet;

the shell is provided with a raw water inlet joint communicated with the raw water inlet, a purified water outlet joint communicated with the purified water collecting cavity and a concentrated water outlet joint communicated with the concentrated water outlet.

Preferably, the filter body member is mounted in the housing in such a manner that the filter membrane is upright.

Preferably, the housing extends axially to have both ends in the axial direction; the filter membrane is rectangular;

the filter element is mounted in the housing in such a manner that the long side of the filter body component coincides with the axial direction of the housing;

the raw water inlet joint, the purified water outlet joint and the concentrated water outlet joint are all arranged at the first end of the shell.

Preferably, the first and second electrodes are formed of a metal,

the purified water outlet is formed on the upper long side edge of the filtering main body component, the packaging component is of an axially extending hollow structure, and the hollow structure forms the purified water collecting cavity;

the raw water inlet is formed in the lower long side edge of the filter main body part, the lower long side edge of the filter main body part and the shell form a raw water inlet cavity in an enclosing mode, and the raw water inlet connector is communicated with the raw water inlet cavity;

the concentrated water outlet is formed on the short side edge of the filtering main body component close to the second end of the shell, a concentrated water collecting cavity is formed on the outer side of the concentrated water outlet, a concentrated water leading-out pipeline is led out from the concentrated water collecting cavity to the first end of the shell, and the concentrated water outlet joint is communicated with the concentrated water leading-out pipeline.

Preferably, the first and second liquid crystal display panels are,

the clean water outlet comprises one clean water outlet, the clean water outlet is formed on the short side edge of the filtering main body component close to the first end of the shell, and the packaging component and the first end of the shell define the clean water collecting cavity;

the raw water inlet is formed in the upper long side edge of the filtering main body component, the upper long side edge of the filtering main body component and the shell enclose a raw water inlet cavity, and the raw water inlet connector is communicated with the raw water inlet cavity;

the concentrated water outlet is formed in the lower long side of the filtering main body component, a concentrated water collecting cavity is defined by the lower long side of the filtering main body component and the shell, and the concentrated water outlet connector is communicated with the concentrated water collecting cavity.

Preferably, the purified water outlet comprises two purified water outlets, the two purified water outlets respectively form two short sides of the filtering main body component, the packaging component is located at the purified water outlet close to the first end of the shell and defines a first purified water collecting cavity with the first end of the shell, a buckle cover is arranged outside the purified water outlet close to the second end of the shell, the buckle cover encloses a second purified water collecting cavity, and a purified water leading-out pipeline which extends towards the first purified water collecting cavity and is communicated with the first purified water collecting cavity is led out from the second purified water collecting cavity.

Preferably, the sheet-shaped component arranged in the purified water flow channel is a sheet-shaped grating or a flow channel cloth; the flaky component arranged in the concentrated water flow channel is a flaky grid or flow channel cloth.

Preferably, the sheet-shaped component arranged in the purified water flow channel is a sheet-shaped grating or flow channel cloth; the sheet-shaped component arranged in the concentrated water flow channel is a flow channel sheet;

the flow channel sheet includes:

the sheet-shaped body is provided with a plurality of vertically extending convex ribs which are horizontally arranged at intervals, and a flat area is arranged above the convex ribs;

the first flow guide holes comprise a plurality of rows arranged along the extension of the convex ribs; the first flow guide hole penetrates through the sheet body and is vertically inclined; wherein:

the vertical inclination directions of the upper first flow guide holes and the lower first flow guide holes which are adjacent in the same row are opposite;

the ports of the first flow guide holes are positioned on two sides of the convex rib;

the flat area is provided with a plurality of second diversion holes penetrating through the sheet-shaped body.

Preferably, the concentrated water collecting cavity is internally provided with a concentrated water leading-out pipeline, one end of the concentrated water leading-out pipeline is connected to the concentrated water outlet joint, and the other end of the concentrated water leading-out pipeline extends to the middle area of the concentrated water collecting cavity.

Preferably, the radial ascending left and right both sides of filtering main part all are provided with the supporting plate frame, the supporting plate frame orientation one side of filtering main part is formed with many support ribs that vertical extension and level were arranged, the supporting plate frame orientation one side of the inner wall of casing is formed with the casing matches and follows a plurality of backup pads that the axial was arranged.

Preferably, the radial left and right sides of the filtering main body component are provided with supporting plate frames, one side of each supporting plate frame, facing the inner wall of the shell, is provided with a plurality of supporting plates which are matched with the inner wall of the shell and are arranged at vertical intervals, and each supporting plate is constructed in a horizontal state.

Preferably, the housing is a cylindrical structure; the first end of the housing is open ended and has an end cap for enclosing the housing.

Preferably, the salt rejection rate of the membrane sheets of two adjacent filter membranes is different.

Compared with the prior art, the utility model discloses a filter element and filter equipment's beneficial effect is:

1. the utility model provides a thick water runner and the water purification fluid in the filter element's among the filter element are injectd into straight runner by the superpose filter membrane, and this straight runner has more even width, compares the spiral runner (or called approximate arc runner) in the filter element part of roll system structure among the prior art, and this straight runner has better diffusion effect.

2. Compare the spiral runner in the filtration main part of rolling up system structure in the filter membrane superpose among the prior art, the utility model discloses a resistance that obtains straight runner in the filtration main part of filter element is littleer to purified water and dense water for even when dense water velocity of flow or flow are lower, dense water or purified water also have the diffusion effect of preferred.

3. Compared with the spiral flow channel in the prior art, the straight flow channel obtained by overlapping the filter membranes has uniform width in any area, and has fewer narrow areas and sharp-angled areas, so that the enrichment amount of solute particles due to the narrow areas and the sharp-angled areas is reduced to a greater extent.

4. The better diffusion effect and lower resistance of the straight flow channel obtained by the overlapping of the filter membranes make solute particles not easily attached to the membrane.

5. The better diffusion effect of the straight flow channel obtained by superposing the filter membranes enables the concentration of the concentrated water in different areas of the concentrated water flow channel to be more uniform, so that the concentration of the concentrated water flowing out of the concentrated water outlet is less influenced by the non-uniform factor of the concentrated water, and the real-time measurement result of the concentration of the concentrated water at the concentrated water outlet can truly reflect the total concentration of the concentrated water.

6. The filter element is arranged in a way that the filter membrane is vertical, so that the concentrated water in the concentrated water flow channel is more uniform by utilizing the gravity of the water or the solute particle attachment is reduced by utilizing the gravity of the water.

7. The utility model provides an among the filter equipment of first kind structure: the concentrated water that lies in the top mixes with the concentrated water that lies in the below under the action of gravity in the concentrated water runner to and the concentrated water that lies in the top mixes with the raw water that just got into concentrated water, and this concentration that is favorable to balanced concentrated water runner medium concentration of concentrated water, and then is favorable to preparing the steady purified water of water quality, and is favorable to monitoring the concentration of concentrated water.

8. In the filtering apparatus of the second structure provided by the present invention: the raw water import and the dense water export of filtering the main part correspond respectively and are located the last long side and the long side down of filtering the main part, this makes dense water runner shorter, and the cooperation utilizes gravity, the raw water forms more smooth and easy following dense water export outflow of dense water through filtering the back, this is favorable to scouring away the diaphragm of dense water runner both sides, therefore, the filter equipment of this structure has better antipollution ability, more is fit for filtering the relatively poor raw water of quality of water, and can keep higher filtration efficiency.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all of the features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar parts throughout the different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a front view of a filter element in a first structure of a filter device according to an embodiment of the present invention.

Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is an enlarged view of a portion E of fig. 2.

Fig. 4 is an enlarged view of the office F of fig. 2.

Fig. 5 is a partially developed view of a filter membrane of a filter main body part in a filter device of a first structure according to an embodiment of the present invention.

Fig. 6 is a view from direction B of fig. 1.

Fig. 7 is a view in the direction C of fig. 1.

Fig. 8 is a view from direction D of fig. 1.

Fig. 9 is a front sectional view of a first structure of a filter device according to an embodiment of the present invention.

Fig. 10 is a sectional view taken along line G-G of fig. 9.

Fig. 11 is a view from direction H of fig. 9.

Fig. 12 is a cross-sectional view of a support plate frame in a first structure of a filter device according to an embodiment of the present invention.

Fig. 13 is a view from direction I of fig. 12.

Fig. 14 is a front view of a flow channel sheet of a first structure of a filter device according to an embodiment of the present invention.

Fig. 15 is a sectional view taken along line J-J of fig. 12.

Fig. 16 is a front view (with a clean water collecting chamber) of a filter element in a second structure of the filter device provided by the embodiment of the present invention.

Fig. 17 is a sectional view taken along line a '-a' of fig. 16.

Fig. 18 is an enlarged view of a portion F' of fig. 17.

Fig. 19 is a partially expanded view of a filter membrane of a filter body member in a second construction of a filter device according to an embodiment of the present invention.

Fig. 20 is a view from E' of fig. 16.

Fig. 21 is a view from direction D' of fig. 16.

Fig. 22 is a view from B' of fig. 16.

Fig. 23 is a view in the direction of C' of fig. 16.

Fig. 24 is a main sectional view (with a clean water collecting chamber) of a second structure of the filter device according to the embodiment of the present invention.

FIG. 25 is a sectional view taken along line G '-G' of FIG. 24.

Fig. 26 is a view from direction H' of fig. 24.

Figure 27 is a front view of a filter element (with two clean water collection chambers) in a second configuration of a filter apparatus according to an embodiment of the present invention.

Fig. 28 is a main sectional view (with two clean water collecting chambers) of a second structure of the filter device according to the embodiment of the present invention.

Fig. 29 is a sectional view taken along line I '-I' of fig. 28.

Reference numerals:

10-a filter element; 11-a filter body component; 111-raw water inlet; 112-purified water outlet; 113-a concentrated water outlet; 12-a package component; 121-a clean water collection chamber; 122-a plug-in connector; 13-a filter membrane; 131-a membrane; 141-a water purification flow channel; 142-a concentrate flow channel; 15-a lamellar grid; 16-a runner sheet; 161-ribs; 162-first flow guide holes; 163-a flat region; 164-second flow directing holes; 20-a housing; 21-a first end; 22-a second end; 23-end caps; 24-a limit stop strip; 31-raw water inlet joint; 32-purified water outlet joint; 33-concentrated water outlet joint; 41-raw water inlet cavity; 42-concentrated water collection cavity; 421-tail cover; 422-concentrated water outlet pipeline; 50-a support plate frame; 51-a support plate; 52-support ribs; 60-carrier plate.

10' -a filter element; 11' -a filter body component; 111' -raw water inlet; 112' -a purified water outlet; 113' -a concentrated water outlet; 12' -a package component; 121' -a clean water collection chamber; 121' -a clean water collection chamber; 123' -plug-in connection; 124' -plug-in connection; 125' -snap cap; 126' -a purified water outlet pipeline; 141' -a purified water flow passage; 142' -a concentrate flow channel; 31' -a raw water inlet joint; 32' -purified water outlet joint; 33' -concentrated water outlet joint; 41' -a raw water inlet cavity; 42' -a concentrated water collection cavity; 421' -concentrated water outlet pipeline; 50' -a support plate frame; 51' -support plate.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are some, not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1 to 29, the present invention discloses a filter element 10, 10' and a filter device comprising the filter element 10, 10', the filter device further comprises a housing 20, and the filter element 10, 10' is packaged in the housing 20. In the case of the filtering apparatus, raw water from a tap water pipe is supplied into the case 20, the raw water introduced into the case 20 is filtered by the filter elements 10, 10' to form purified water and concentrated water, and the formed purified water and concentrated water are then discharged from the case 20.

As shown in fig. 1 to 8, the filter element 10, 10' comprises a filter body part 11, 11' and a containment part 12, 12'. The filter body member 11, 11' comprises a plurality of flat filter membranes 13, the plurality of flat filter membranes 13 being stacked.

It should be noted that: the so-called flat filter membrane 13 is the one that is rolled as opposed to the prior art filter element 10, 10' in which the filter membrane 13 is rolled, i.e. in the present invention, the filter membrane 13 is in an unrolled state and is stacked.

Every filter membrane 13 all includes two relative diaphragms 131, and these two diaphragms 131 can be two diaphragms 131 that form by the great diaphragm 131 fifty percent discount of an area, the utility model discloses a two diaphragms 131 that show in the drawing (as fig. 3) just form by a diaphragm 131 fifty percent discount, and the filter membrane 13 that forms with the fifty percent discount mode need avoid the fifty percent discount department to sharpen, makes the fifty percent discount department passivation as far as possible, and then avoids the filter effect at the fifty percent discount department variation and solute (probably contains impurity) attached to, pile up in this fifty percent discount department. The preferable scheme is as follows: the two sheets 131 of the filter membrane 13 are two separate sheets 131, which avoids the formation of a sharp area of the filter membrane 13 in the fold.

Concentrated water flow passages 142, 142' are defined between each two adjacent filter membranes 13 which are stacked, and further, multiple layers of concentrated water flow passages 142, 142' are formed at intervals in the filter body parts 11, 11 '; the two membranes 131 of each filter membrane 13 define purified water flow paths 141, 141 'therebetween, and further, a plurality of layers of purified water flow paths 141, 141' are formed in the filter body members 11, 11 'at intervals and are alternately arranged with the plurality of layers of concentrated water flow paths 142, 142'. The raw water enters the concentrated water flow passages 142, 142' and is filtered by the membranes 131 at both sides to form purified water, and then enters the purified water flow passages 141, 141', and the raw water in the concentrated water flow passages 142, 142' is continuously filtered to form concentrated water.

As shown in fig. 2, a sheet member for supporting the membrane 131 to maintain the width of the flow passage and preventing the membrane 131 from being deformed by pressure to narrow the entire area or a partial area of the flow passage is disposed in each of the purified water flow passage 141, 141 'and the concentrate flow passage 142, 142'. The sheet member is required to have not only a good pressure resistance but also to ensure that water can pass through it (sheet member). A sheet-like grid 15 or a flow path cloth having a preferable pressure resistance can be selected as the sheet-like member.

The filter membrane 13 is formed in a rectangular shape by cutting the membrane sheet 131 into a rectangular shape, and the filter body members 11, 11' formed by stacking the filter membranes 13 have four sides in conformity with the filter membrane 13. The raw water inlets 111, 111', the purified water outlets 112, 112' and the concentrated water outlets 113, 113 'are respectively formed at different sides of the filtering body members 11, 11', so that the raw water entering the housing 20 enters the concentrated water flow passages 142, 142 'through the raw water inlets 111, 111', and is filtered by the membrane 131 while passing through the concentrated water flow passages 142, 142', the filtered purified water flows out of the filtering body members 11, 11' from the purified water outlets 112, 112 'through the purified water flow passages 141, 141', and the filtered concentrated water flows out of the filtering body members 11, 11 'from the concentrated water outlets 113, 113'.

The raw water inlets 111, 111', the purified water outlets 112, 112', and the concentrated water outlets 113, 113' are constructed as follows:

as shown in fig. 4, the edges of all the concentrated water channels 142, 142' corresponding to the side where the raw water inlets 111, 111' are located are opened, and the edges of the purified water channels 141, 141' corresponding to the side are closed. For example, the filter membrane 13 is formed by folding one membrane sheet 131 in half, and the folded area is the side, so that the edges of the purified water flow paths 141, 141 'are naturally in a closed state, or a colloid is filled between the edges of the two membrane sheets 131 of each filter membrane 13 corresponding to the side to close the edges of the purified water flow paths 141, 141', or the two membrane sheets 131 are closely adhered by a hot melting method; the edges of the concentrate flow passages 142, 142 'are open by making the edges of the sheet-like members in the concentrate flow passages 142, 142' corresponding to the side edges flush with the edges of each adjacent two of the filter membranes 13.

As shown in fig. 3, the edges of the purified water flow passages 141, 141' corresponding to the side where the purified water outlets 112, 112' are located are both open, and the edges of the concentrated water flow passages 142, 142' corresponding to the side are both closed. For example, the glue is filled between the edges of each two adjacent filter membranes 13 corresponding to the side edges to seal the edges of the concentrated water channels 142, 142', or the edges of the two filter membranes 13 are closely adhered by a hot melting method; the edges of the sheet-shaped parts in the purified water flow channels 141, 141 'corresponding to the side edges are flush with the two membranes 131 of the filter membrane 13, so that the purified water flow channels 141, 141' are open.

As shown in fig. 6, the edges of the concentrated water flow passages 142, 142' corresponding to the side where the concentrated water outlets 113, 113' are located are both opened, and the edges of the purified water flow passages 141, 141' corresponding to the side are both closed. For example, the glue is filled between the edges of the two membranes 131 of each filter membrane 13 corresponding to the side edge to seal the edges of the purified water channels 141, 141', or the two membranes 131 are closely adhered by using a hot melting method; the edges of the sheet-like members in the concentrate flow paths 142, 142 'corresponding to the side edges are flush with the edges of each of the two filter membranes 13 to realize the opening of the edges of the concentrate flow paths 142, 142'.

As shown in fig. 2 and 3, the enclosing parts 12, 12 'are formed with attachment notches into which the sides of the purified water outlets 112, 112' of the filtering body parts 11, 11 'are fitted and integrated with the enclosing parts 12, 12' by means of a sealing connection such as bonding. The combination of the potting component 12, 12 'with the filtering body component 11, 11' provides benefits such as installation and use. For example, the combination of the enclosing part 12, 12 'with the filter body part 11, 11' allows the filter element 10, 10 'to be purchased as a single product for the user, thus avoiding the purchase of a unitary filter device, and for example, the attachment notch of the enclosing part 12, 12' provides a stop for the clean water outlet 112, 112', so that the clean water outlet 112, 112' has a stable flow cross section, reducing the influence of pressure on the flow cross section of the clean water outlet 112, 112', avoiding deformations at the clean water outlet 112, 112', in particular avoiding bulging deformations; for another example, after the filter element 10, 10' is installed in the housing 20, the interior of the housing 20 is positioned by the potting component 12, 12' such that the entire filter element 10, 10' is easily secured in a certain assembly position.

The packing member may have various structures, and the specific structure of the packing member is related to the structure of the housing 20, the collection and discharge manner of the purified water, and the like. For example, as shown in fig. 1, the packing member may be configured in a hollow structure which communicates with the purified water outlet 112 as the purified water collecting chamber 121, and the purified water flowing out of the purified water outlet 112 first enters the purified water collecting chamber 121 and then is guided out of the housing 20. For another example, as shown in fig. 16 and 24, the packing member may have a plate-like structure, and after the filter element 10' is installed in the housing 20, the packing member 12' and the housing 20 of the plate-like structure may enclose the purified water collecting chamber 121'.

The housing 20 serves to enclose the filter element 10, 10' such that a closed environment within the housing 20 is created during the process of preparing purified water. The housing 20 may be implemented in various structures, and the structural form of the housing 20 is related to the structural form of the filter element 10, 10', a purified water preparing system (or called water purifying system), and the like.

In view of the filter body members 11, 11' having a substantially square cross section obtained by stacking filter membranes 13 having a rectangular shape with a certain aspect ratio, the present invention provides a housing 20 having a structure, as shown in fig. 9 and 24, that is, a cylindrical structure having a certain axial length is configured as the housing 20. The housing 20 has a first end 21 and a second end 22 in the axial direction, and the first end 21 of the housing 20 is provided with an end cap 23. The filter element 10, 10 'is ported into the housing 20 from the first end 21 of the housing 20, and the end cap 23 is used to enclose the filter element 10, 10' in the housing 20.

On the basis of the construction of the housing 20 as a tubular structure, the invention also provides an arrangement of the housing 20 itself and of the filter element 10, 10' relative to the housing 20. As shown in fig. 9 and 10 and fig. 24 and 25, the arrangement is: the housing 20 is in a horizontal state; the filter elements 10, 10' are mounted in the housing 20 in such a way that the filter membrane 13 stands upright; also, the filter element 10, 10 'is installed in the housing 20 in such a manner that the long side of the filter body member 11, 11' coincides with the axial direction of the housing 20.

Raw water inlet joints 31, 31', purified water outlet joints 32, 32' and concentrated water outlet joints 33, 33' are arranged on the shell 20; in the housing 20, the raw water inlet chambers 41, 41' are formed in the regions where the raw water inlets 111, 111' of the filtering body members 11, 11' face, the purified water collecting chambers 121, 121' are formed in the regions where the purified water outlets 112, 112' face, and the concentrated water collecting chambers 42, 42' are formed in the regions where the concentrated water outlets 113, 113' face; so that the raw water inlet joints 31, 31' communicate with the raw water purified water chamber, the purified water outlet joints 32, 32' communicate with the purified water collecting chambers 121, 121', and the concentrated water outlet joints 33, 33' communicate with the concentrated water collecting chambers 42, 42'. In this way, the raw water from the tap water pipe enters the raw water inlet chambers 41, 41 'of the housing 20 through the raw water inlet joints 31, 31' and, during the flow of the raw water purification chamber, enters the concentrated water flow passages 142, 142 'of the respective layers through the raw water inlets 111, 111' of the filter body members 11, 11', the purified water obtained by the filtration flows out from the purified water outlets 112, 112' through the purified water flow passages 141, 141 'and enters the purified water collection chambers 121, 121', and then flows out from the housing 20 through the purified water outlet joints 32, 32', and the concentrated water generated by the purification flows out from the concentrated water outlets 113, 113' into the concentrated water collection chambers 42, 42 'and then flows out from the housing 20 through the concentrated water outlet joints 33, 33'.

As shown in fig. 10 and 25, support plate frames 50, 50 'are arranged on both left and right sides of the filtering body members 11, 11' in the radial direction, and stopper bars 24 are provided on the inner walls of the housing 20 above and below the support plate frames 50, 50 'to perform positioning of the support plate frames 50, 50'. The support plate frame 50, 50' not only ensures the filter body member 11, 11' at a certain assembling position, but also restricts the expansion of the filter body member 11, 11' in both the left and right directions in the radial direction, which is very advantageous for maintaining the width of the concentrate flow passage 142, 142' and the purified water flow passage 141, 141 '.

The utility model provides a filter equipment of foretell structure has following advantage:

1. the utility model provides a thick water runner 142, 142 'and the water purification fluid in the filtration main part 11, 11' in filter element 10, 10 'are injectd into straight runner by superpose filter membrane 13, and this straight runner has more even width, compares in the spiral runner (or the arc runner of calling for approximation) in the filtration main part 11 of rolling up the system structure among the prior art, 11', and this straight runner has better diffusion effect.

2. Compared with the spiral flow channel in the filtering main body parts 11, 11' of the filter membrane 13 stacking rolling structure in the prior art, the resistance of the straight flow channel obtained in the filtering main body parts 11, 11' of the filtering elements 10, 10' to the purified water and the concentrated water is smaller, so that the concentrated water or the purified water also has better diffusion effect even when the flow rate or the flow rate of the concentrated water is lower.

3. Compared with the spiral flow channel in the prior art, the straight flow channel obtained by overlapping the filter membranes 13 has uniform width in any area, and has fewer narrow areas and sharp-angled areas, so that the enrichment amount of solute particles due to the narrow areas and the sharp-angled areas is reduced to a greater extent.

4. The better diffusion effect and lower resistance of the straight flow path obtained by stacking the filter membranes 13 makes the solute particles less likely to adhere to the membrane 131.

5. The better diffusion effect of the straight flow channels obtained by overlapping the filter membranes 13 makes the concentration of the concentrated water in different areas of the concentrated water flow channels 142, 142' more uniform, so that the concentration of the concentrated water flowing out of the concentrated water outlets 113, 113' is less influenced by the non-uniform factors of the concentrated water, and the real-time measurement result of the concentration of the concentrated water at the concentrated water outlets 113, 113' can truly reflect the total concentration of the concentrated water.

6. The filter element 10, 10 'is arranged in such a manner that the filter membrane 13 is erected, which is advantageous in making the concentrate in the concentrate flow passage 142, 142' more uniform by the gravity of water or in reducing the attachment of solute particles by the gravity of water.

The utility model discloses to raw water import, water purification export, dense water export formed the position in filtering the main part, provide the filter equipment of two kinds of structures.

Filter device of first structure

As shown in fig. 1 to 15, in the filter device of the present structure, the raw water inlet 111 of the filter body member 11 of the filter element 10 is formed at the lower long side of the filter body member 11, the purified water outlet 112 is formed at the upper long side of the filter body member 11, and the concentrated water outlet 113 is formed at the short side of the filter body member 11 near the second end 22 of the housing 20.

The packing member 12 is a strip member having an arc-shaped cross section and extending axially, the packing member 12 is a hollow structure, the hollow structure forms a purified water collecting chamber 121 extending axially to both ends of the housing 20, and the upper long side of the filtering body member 11 is mounted on the bottom of the packing member 12 in an attachment notch, so that the purified water outlet 112 is communicated with the purified water collecting chamber 121. The arc-shaped outer peripheral surface of the upper surface of the packing member 12 is matched with the inner wall of the housing 20 to obtain a compact assembling effect.

The lower long side of the filter body member 11 and the bottom of the inner wall of the housing 20 define a raw water inlet chamber 41 extending axially to both ends of the housing 20.

The short side of the filtering body component 11 near the second end 22 of the casing 20 is provided with a tail cover 421, and the tail cover 421 and the short side enclose a concentrated water collecting cavity 42. A concentrate discharge conduit 422 leads from the concentrate collection chamber 42, the concentrate discharge conduit 422 extending toward the first end 21 of the housing 20.

The raw water inlet joint 31, the purified water outlet joint 32 and the concentrated water outlet joint 33 are formed on the end cover 23 at the first end 21 of the shell 20 and are opposite to the raw water inlet cavity 41, the purified water collecting cavity 121 and the concentrated water outlet pipeline 422 respectively; the inner side of the raw water inlet joint 31 extends into the raw water inlet cavity 41 and is communicated with the raw water inlet cavity 41, the end part of the packaging component 12 close to the first end 21 of the shell 20 is led out of a plug-in joint 122, and the plug-in joint 122 is plugged in the inner side of the purified water outlet joint 32 so that the purified water outlet joint 32 is communicated with the purified water collecting cavity 121; the end of the concentrate lead-out pipe 422 is inserted into the inner side of the concentrate water outlet joint 33 so that the concentrate water outlet joint 33 is communicated with the concentrate collecting cavity 42 through the concentrate lead-out pipe 422.

As shown in fig. 9, the raw water from the tap water pipe enters the raw water inlet chamber 41 through the raw water inlet joint 31, flows along the raw water inlet chamber 41 toward the second end 22 of the housing 20, enters the concentrated water flow passage 142 in each region in the axial direction of the raw water purification port under pressure while flowing, fills the concentrated water flow passage 142 under pressure, filters the raw water in the concentrated water flow passage 142 to form purified water in the purified water flow passage 141 by the diaphragm 131 of the filter 13, finally flows into the purified water collection chamber 121 under pressure, then flows toward the first end 21 of the housing 20 to flow out from the purified water outlet joint 32, and finally flows out from the concentrated water collection chamber 42 through the concentrated water outlet 113 under pressure, and then flows out from the concentrated water outlet joint 33 under the guidance of the concentrated water discharge pipe 422.

In the filter device of the present configuration, as shown in fig. 10, 12, and 13, the support plate frames on both sides of the main filter body member 11 have the following features: one side of the supporting plate frame 50 facing the filtering main body component 11 is formed with a plurality of supporting ribs 52 extending vertically and arranged horizontally, and one side of the supporting plate frame 50 facing the inner wall of the housing 20 is formed with a plurality of supporting plates 51 matched with the housing 20 and arranged along the axial direction. In order to avoid interference with the concentrated water discharge pipe 422, the support plate frame 50 is provided with a hole through which the concentrated water discharge pipe 422 passes and which axially penetrates all the support plates 51.

The above-described structure of the supporting board frame 50 has the following advantages:

1. the support ribs 52 on the support plate frame 50 allow the support plate frame 50 to form flow passages with the sides of the filtering body member 11, thereby preventing solute particles from adhering between the support plate frame 50 and the filtering body member 11.

2. The support plates 51 of the support plate frame 50 define flow passages therebetween, so that fluid (including concentrated water and raw water) flows through the flow passages to wash regions on both sides of the filter body member 11, thereby circulating water in the housing 20.

In the filter device of this configuration, as shown in fig. 9, a carrier plate 60 is provided below the first end 21 of the main filter body member 11 close to the housing 20, the carrier plate 60 is configured to engage with the bottom of the main filter body member 11 and the bottom of the inner wall of the housing 20, and the carrier plate 60 is inserted through the inside of the concentrate outlet connector 33. The bottom of the tail cap 421 at the concentrate outlet 113 of the filter body member 11 has a fulcrum plate which is supported on the inner wall of the housing 20. In this manner, both ends of the filter body member 11 in the axial direction are supported by the carrier plate 60 and the stay.

The filter device of the structure has the advantages that:

the concentrated water located above in the concentrated water channel 142 is mixed with the concentrated water located below under the action of gravity, and the concentrated water located above is mixed with the raw water which just enters the concentrated water, so that the concentration of the concentrated water in the concentrated water channel 142 is favorably balanced, the purified water with stable water quality is favorably prepared, and the concentration of the concentrated water is favorably monitored.

In the filter device of the present structure, the sheet-shaped grill 15 is disposed in the purified water flow passage 141 in the filtering body member 11, and the flow passage sheet 16 of the following structure is disposed in the concentrated water flow passage 142:

as shown in fig. 14 and 15, the flow passage sheet 16 includes a sheet-shaped body, first guide holes 162, and second guide holes 164. The sheet-like body can be injection-molded by plastic materials, a plurality of ribs 161 which vertically extend and are horizontally arranged at intervals are formed on two sides of the sheet-like body, and a flat area 163 is arranged above the ribs 161 of the sheet-like body. The first flow guiding holes 162 comprise a plurality of rows arranged along the extending direction of the convex rib 161, and the first flow guiding holes 162 penetrate through the sheet-shaped body and are vertically inclined; the vertical inclination directions of the upper first guide holes 162 and the lower first guide holes 162 in the same row and adjacent to each other are opposite, and the ports of the first guide holes 162 are located at both sides of the protruding rib 161. The first diversion hole 162 may be formed in the sheet body using a laser drilling tool. The flat region 163 is arranged with a plurality of second flow guiding holes 164 through the sheet-like body. The two sides of the top of the flow channel piece 16 are provided with the step structures 165 protruding towards the two sides, and the thickness of the step structures 165 is consistent with the thickness defined by the convex ribs 161 at the two sides, so that the width of the edge of the concentrated water flow channel 142 is consistent with the width of the corresponding area of the convex ribs 161.

The above-described flow channel sheet 16 has the following advantages:

the ribs 161 support the membrane 131 on both sides of the flow passage sheet 16, which facilitates the flow of water in the concentrate flow passage 142. And, a vertical flow passage is defined between two adjacent ribs 161 to facilitate the mixing of the concentrated water at the upper part and the concentrated water at the lower part. The first diversion holes 162 enable part of the concentrated water in the flow channel to shuttle to the two sides of the flow channel piece 16, which not only has a certain scouring effect on the membrane 131, but also has a scouring effect on the joint of the two sides of the convex rib 161, thereby avoiding the attachment of solute particles. Moreover, the dense water shuttled to the two sides of the runner piece 16 is beneficial to the dense water on the two sides of the runner piece 16 to be fully mixed. The concentrated water finally passes through the flat region 163 at the upper portion of the channel piece 16 and flows out from the concentrated water outlet 113, and the concentrated water at both sides of the channel piece 16 is mixed by the second guide holes 164 while passing through the flat region 163. So that the flat region 163 is disposed above the flow channel sheet 16 for guiding the concentrate, which is advantageous for the concentrate to obtain a uniform concentration before being guided out of the concentrate outlet 113.

Filter device of the second structure

As shown in fig. 16 to 26, in the filtering apparatus of the present structure, the raw water inlet 111 'of the filtering body part 11' of the filtering element 10 'is formed at the upper long side of the filtering body part 11', the purified water outlet 112 'is formed at least at the short side of the filtering body part 11' near the first end 21 of the housing 20, and the concentrated water outlet 113 'is formed at the lower long side of the filtering body part 11'.

The enclosing part 12' is a disc-shaped structure matching with the inner wall of the housing 20, the disc-shaped part is arranged in the housing 20 near the first end 21 of the housing 20, and the enclosing part 12' and the end cover 23 enclose a purified water collecting cavity 121'. The plate-like structure of the packing member 12 'also provides a better support for the filtering body member 11'.

The upper long side of the filtering body part 11 'and the top of the inner wall of the housing 20 define a raw water inlet chamber 41'.

The lower long side of the filtering body member 11 'defines a concentrated water collecting chamber 42' with the bottom of the inner wall of the housing 20. A concentrate outlet pipe 421' is disposed in the concentrate outlet chamber, and the concentrate outlet pipe 421' extends from the first end 21 of the housing 20 to the middle of the concentrate collecting chamber 42'.

The raw water inlet joint 31', the purified water outlet joint 32' and the concentrated water outlet joint 33 'are formed on the end cap 23 at the first end 21 of the housing 20, and are opposite to the raw water inlet chamber 41', the purified water collecting chamber 121 'and the concentrated water outlet pipe 421', respectively. A plug-in connector 123' is formed on the upper part of the sealing member 12' and is inserted into the raw water inlet connector 31' to form a communication state; the lower part of the sealing part 12 'forms a plug-in joint 124' to be plugged with the concentrated water outlet pipeline 421 'and the concentrated water outlet joint 33' so that the concentrated water outlet joint 33 'is communicated with the concentrated water outlet pipeline 421'; the purified water outlet joint 32 'is communicated with the purified water collecting cavity 121'.

As shown in fig. 24, raw water from a tap water pipe is introduced into the raw water inlet chamber 41' located above the filter body member 11' through the raw water inlet joint 31' and flows in a direction toward the second end 22 of the housing 20 along the raw water inlet chamber 41', and at the same time, the raw water is introduced into the concentrate flow passage 142' from various regions in the axial direction of the raw water inlet 111' by pressure and gravity, and is charged into the concentrate flow passage 142' by pressure and gravity, and the raw water in the concentrate flow passage 142' is filtered by the membrane 131 of the filter membrane 13 to form purified water in the purified water flow passage 141', and the purified water finally flows into the purified water collecting chamber 121' by pressure and then flows out from the purified water outlet joint 32 '. Under the action of pressure and gravity, the concentrated water generated by filtering finally flows out from the concentrated water outlet 113 'to enter the concentrated water collecting cavity 42', and then flows out from the concentrated water outlet joint 33 'under the guidance of the concentrated water outlet pipeline 421'.

In the filtering apparatus of this construction, the supporting plate frames 50 'at both sides of the filtering body member 11' have the following features: the side of the support plate frame 50' facing the inner wall of the housing 20 is formed with a plurality of support plates 51' vertically spaced matched with the inner wall of the housing 20, and each support plate 51' is configured in a horizontal state. The horizontal support plate 51' intercepts the raw water to prevent the raw water from directly flowing to the concentrated water collecting chamber 42' from a gap between the filtering body part 11' and the case 20.

In a more preferred construction, as shown in fig. 27 to 29, both short sides of the filtering body member 11 'are formed with clean water outlet ports 112',112", and another clean water collecting chamber 112" is defined by providing a snap cap 125 'at the short side of the filtering body member 11' near the second end 22 of the housing 20, so that both ends of the filtering body member 11 'are formed with clean water collecting chambers 112',112 ". The clean water collecting chamber 112 "near the second end 22 of the housing 20 leads out a clean water lead-out conduit 126' which clean water lead-out conduit 126' extends to the clean water collecting chamber 121' near the first end 21 of the housing 20. In this manner, the two clean water collecting chambers 112',112 "simultaneously collect the clean water and eventually merge into the clean water collecting chamber 121' near the first end 21 of the housing 20, and then exit the clean water outlet connection 32 '.

The filter device of the structure has the advantages that:

the raw water inlet 111' and the concentrated water outlet 113' of the filtering main body component 11' are respectively and correspondingly positioned on the upper long side and the lower long side of the filtering main body component 11', so that the concentrated water flow channel 142' is shorter, gravity is utilized in a matching manner, the raw water forms more smooth concentrated water flowing out from the concentrated water outlet 113' after being filtered, and the membrane 131 on the two sides of the concentrated water flow channel 142' is favorably flushed, therefore, the filtering device with the structure has better anti-pollution capability, is more suitable for filtering the raw water with poorer water quality, and can keep higher filtering efficiency.

The filter membranes 13 in the above-described two-structure filter devices are arranged in the following manner with respect to the salt rejection ratio:

two adjacent filter membranes 13 select the diaphragm 131 of different desalination rate specifications (the aperture size is different) to make for use, this is favorable to obtaining the clear solute concentration that the desalination rate specification is injectd, has increased the diversification of the quality of water of purified water, provides more extensive drinking experience for the user.

Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be utilized by those of ordinary skill in the art upon reading the foregoing description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention which may occur to those skilled in the art and which fall within the spirit and scope of the invention should be considered as falling within the scope of the invention.

Claims

1. A filter element, comprising:

the filter body component comprises a plurality of filter membranes which are straightly superposed, each filter membrane comprises two opposite membranes, a straightly purified water flow passage is defined between the two membranes of each filter membrane, and a straightly concentrated water flow passage is defined between every two adjacent filter membranes; constructing a purified water outlet on at least one side edge of the filtering main body component by closing the edge of the concentrated water flow channel corresponding to the side edge and opening the edge of the purified water flow channel; the other two sides of the filtering main body component respectively construct a raw water inlet and a concentrated water outlet by closing the edges of the purified water flow passages corresponding to the two sides and opening the edges of the concentrated water flow passages;

a sheet member arranged in the pure water flow passage and the concentrated water flow passage for maintaining a flow passage width;

2. The filter element of claim 1, wherein the enclosing member is a hollow structure, and the hollow structure serves as the clean water collecting chamber.

3. The filter element according to claim 1, wherein the enclosing member is a plate-shaped structure, and a side of the enclosing member facing away from the filter main body member and a housing of the filter device enclose the clean water collecting chamber.

4. A filter device, comprising:

a housing;

a filter element mounted in the housing; wherein:

the filter main body component comprises a plurality of filter membranes which are stacked straightly, each filter membrane comprises two opposite membranes, a straight purified water flow passage is defined between the two membranes of each filter membrane, and a straight concentrated water flow passage is defined between every two adjacent filter membranes; constructing a purified water outlet on at least one side edge of the filtering main body component by closing the edge of the concentrated water flow channel corresponding to the side edge and opening the edge of the purified water flow channel; the other two sides of the filtering main body component respectively construct a raw water inlet and a concentrated water outlet by closing the edges of the purified water flow passages corresponding to the two sides and opening the edges of the concentrated water flow passages;

a sheet member disposed in the pure water flow passage and the concentrated water flow passage for maintaining a flow passage width;

5. A filter device as claimed in claim 4, wherein the filter body member is mounted in the housing in such a manner that the filter membrane is upstanding.

6. The filter device according to claim 5, wherein the housing extends axially to have both ends in an axial direction; the shape of the filter membrane is rectangular;

the filter element is installed in the housing in such a manner that the long side of the filter main body part coincides with the axial direction of the housing;

7. The filtration device of claim 6,

8. The filtration device of claim 6,

9. The filtration device of claim 8, wherein the purified water outlet comprises two purified water outlets, the two purified water outlets respectively form two short sides of the filtering main body, the packaging member is located at the purified water outlet near the first end of the housing and defines a first purified water collecting cavity with the first end of the housing, a buckle cover is arranged outside the purified water outlet near the second end of the housing, the buckle cover defines a second purified water collecting cavity, and a purified water outlet pipe which extends towards the first purified water collecting cavity and is communicated with the first purified water collecting cavity is led out from the second purified water collecting cavity.

10. The filtration device according to claim 7 or 8, wherein the sheet member disposed in the purified water flow passage is a sheet-shaped grating or a flow passage cloth; the flaky component arranged in the concentrated water flow channel is a flaky grid or flow channel cloth.

11. The filtering device as claimed in claim 7, wherein the sheet member disposed in the purified water flow passage is a sheet-shaped grating or a flow passage cloth; the sheet-shaped part arranged in the concentrated water flow channel is a flow channel sheet;

the flow channel sheet includes:

the vertical inclination directions of the upper first flow guide holes and the lower first flow guide holes which are in the same row and are adjacent to each other are opposite;

the port of the first flow guide hole is positioned at two sides of the convex rib;

12. The filtering device according to claim 8 or 9, wherein a concentrate lead-out pipe is arranged in the concentrate collecting cavity, one end of the concentrate lead-out pipe is connected to the concentrate outlet joint, and the other end of the concentrate lead-out pipe extends to the middle area of the concentrate collecting cavity.

13. The filtering device as claimed in claim 7, wherein the filtering main body part is provided at both of left and right sides in a radial direction thereof with a supporting plate frame, one side of the supporting plate frame facing the filtering main body part is formed with a plurality of supporting ribs extending vertically and arranged horizontally, and one side of the supporting plate frame facing the inner wall of the housing is formed with a plurality of supporting plates matched with the housing and arranged axially.

14. The filtering apparatus as claimed in claim 8 or 9, wherein the radially left and right sides of the filtering main body part are each provided with a support plate frame, one side of the support plate frame facing the inner wall of the housing is formed with a plurality of support plates vertically spaced to match the inner wall of the housing, and each of the support plates is configured in a horizontal state.

15. The filtration device of claim 5, wherein the housing is of cylindrical construction; the first end of the housing is open ended and has an end cap for enclosing the housing.

16. The filtration apparatus as claimed in claim 5, wherein the membranes of adjacent two of said filtration membranes have different salt rejection rates.