CN113979570B

CN113979570B - Composite filter element and water purifier

Info

Publication number: CN113979570B
Application number: CN202111483395.1A
Authority: CN
Inventors: 刘社军; 刘正
Original assignee: Foshan Xinyao Environmental Protection Technology Co Ltd
Current assignee: Foshan Xinyao Environmental Protection Technology Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2024-10-15
Anticipated expiration: 2041-12-07
Also published as: CN113979570A

Abstract

The invention provides a composite filter element and a water purifier, which relate to the technical field of water treatment, wherein the composite filter element comprises a shell, a filter cavity is arranged in the shell, and a central tube is arranged in the filter cavity; an opening communicated with the filter cavity is formed in one end of the shell, a cover plate used for sealing the opening is arranged at the opening, and a positioning shaft is arranged at the center of the cover plate; one end of the central tube is fixed on the positioning shaft. The composite filter element provided by the invention adopts a structure that the built-in filter element and the external filter element are sequentially sleeved on the central tube, namely, the structure of an upper small filter element and a lower small filter element is avoided, so that the upper shell and the lower shell are welded into a whole, and the welding part is easy to leak water after a period of use; and the shell is an integral body, no welding part exists, and the problem of water leakage is solved.

Description

Composite filter element and water purifier

Technical Field

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

Background

With the continuous perfection of water purifier equipment, various types of composite filter elements begin to appear on the market, and the composite filter element combines a plurality of filter elements into a whole, so that the space can be better saved while the functions of the filter elements are ensured. However, most of the existing composite filter element is of an upper small filter element structure and a lower small filter element structure, the upper small filter element and the lower small filter element are respectively installed through the upper shell and the lower shell, and finally the upper shell and the lower shell are welded into a whole in a welding mode. On the other hand, the internal waterway structure of the traditional composite filter element device is complex, and the processing difficulty is increased, so that the production cost is increased.

Disclosure of Invention

The invention aims to provide a composite filter element and a water purifier, which are used for solving the technical problem that water is easy to leak at a welding part of a composite filter element with an upper filter element structure and a lower filter element structure.

In a first aspect, the invention provides a composite filter element, comprising a shell, wherein a filter cavity is arranged in the shell, and a central tube is arranged in the filter cavity;

an opening communicated with the filter cavity is formed in one end of the shell, a cover plate used for sealing the opening is arranged at the opening, and a positioning shaft is arranged at the center of the cover plate; one end of the central tube is fixed on the positioning shaft;

an internal filter element and an external filter element are sleeved on the central tube in sequence; a water inlet cavity is formed between the external filter element and the inner wall of the shell;

The shell is provided with a water inlet communicated with the water inlet cavity, a water outlet communicated with the central pipe and a waste water port communicated with the built-in filter element;

The water to be filtered entering from the water inlet enters into the water inlet cavity, sequentially passes through the external filter element and the internal filter element, enters into the central tube and flows out from the water outlet;

Water that does not enter the center tube forms wastewater that flows out of the wastewater port.

In an alternative embodiment, a bottom mount is provided at an end of the housing remote from the opening;

A water outlet pipe corresponding to the positioning shaft is arranged on the bottom mounting seat, and the water outlet pipe is communicated with the water outlet;

The bottom mounting seat is sequentially sleeved outside the water outlet pipe and provided with an internal mounting seat for mounting an internal filter element and an external mounting seat for mounting an external filter element;

a water discharging cavity for allowing wastewater to flow into the wastewater port is arranged between the built-in mounting seat and the water outlet pipe.

In an alternative embodiment, a diversion cavity is formed between the built-in mounting seat and the inner wall of the shell, and the diversion cavity is communicated with the water inlet cavity.

In an alternative embodiment, the external filter element comprises an inner layer and an outer layer sleeved on the inner layer, and an external filter membrane group is arranged between the outer layer and the inner layer.

In an alternative embodiment, the external filtration membrane module is formed by wrapping the inner layer with a composite filter element.

In an alternative embodiment, the composite filter element comprises a first PP cotton layer, an activated carbon and scale inhibitor mixed layer and a second PP cotton layer which are sequentially overlapped from bottom to top.

In an alternative embodiment, the built-in filter element is formed by winding the central tube with built-in filter membrane groups of n (n.gtoreq.1) groups.

In an alternative embodiment, the built-in filtering membrane group comprises a concentrated water separation net layer, a first reverse osmosis membrane layer, a carbon fiber layer and a second reverse osmosis membrane layer, wherein the concentrated water separation net layer is arranged at the bottom layer of the built-in filtering membrane group; the desalination device comprises a first reverse osmosis membrane layer, a second reverse osmosis membrane layer, a desalination layer, a carbon fiber layer, a desalination layer and glue, wherein the carbon fiber layer is arranged between the first reverse osmosis membrane layer and the second reverse osmosis membrane layer, the desalination layer of the second reverse osmosis membrane layer is away from the carbon fiber layer, the glue is arranged on the desalination layer of the first reverse osmosis membrane layer, and the first reverse osmosis membrane layer is fixedly connected with the second reverse osmosis membrane layer through the glue.

In alternative embodiments, the carbon fiber layer comprises carbon fiber sheets, or the carbon fiber layer is a layer structure formed by splicing carbon fiber sheets and activated carbon.

The composite filter element provided by the invention adopts a structure that the built-in filter element and the external filter element are sequentially sleeved on the central tube, namely, the structure of an upper small filter element and a lower small filter element is avoided, so that the upper shell and the lower shell are welded into a whole, and the welding part is easy to leak water after a period of use; and the shell is an integral body, no welding part exists, and the problem of water leakage is solved.

In a second aspect, the present invention provides a water purifier comprising a composite filter element according to any one of the preceding embodiments.

The invention also provides a water purifier which adopts the composite filter element, thereby having all the beneficial effects of the composite filter element.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the internal structure of a composite filter element according to an embodiment of the present invention;

FIG. 2 is an enlarged view of part of A, which is a schematic view of the internal structure of the composite filter element shown in FIG. 1;

FIG. 3 is a schematic view of the structure of an external filter element of the composite filter element shown in FIG. 1;

FIG. 4 is a schematic view of the built-in filter element of the composite filter element of FIG. 1;

Fig. 5 is a schematic diagram of the working principle of the built-in filter element of the composite filter element shown in fig. 1.

Icon: 100-a housing; 101-a cover plate; 102-positioning a shaft; 200-a central tube; 300-arranging a filter element; 301-a concentrated water screen layer; 302-a first reverse osmosis membrane layer; 303-a carbon fiber layer; 304-a second reverse osmosis membrane layer; 400-an external filter element; 401-a first PP cotton layer; 402-a mixed layer of activated carbon and scale inhibitor; 403-a second PP cotton layer; 500-water inlet cavity; 600-diversion cavity; 700-water inlet; 800-a water outlet; 900-waste water port; 110-a water outlet pipe; 120-built-in mounting base; 130-an external mounting seat; 140-drainage chamber.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

Referring to fig. 1 to 5, the present invention provides a composite filter element, including a housing 100, wherein a filter cavity is provided in the housing 100, and a central tube 200 is provided in the filter cavity;

An opening communicated with the filter cavity is formed in one end of the shell 100, a cover plate 101 for sealing the opening is arranged in the opening, and a positioning shaft 102 is arranged in the center of the cover plate 101; one end of the central tube 200 is fixed on the positioning shaft 102;

An internal filter element 300 and an external filter element 400 are sequentially sleeved on the central tube 200; a water inlet cavity 500 is formed between the external filter element 400 and the inner wall of the housing 100;

the shell 100 is provided with a water inlet 700 communicated with the water inlet cavity 500, a water outlet 800 communicated with the central pipe 200 and a wastewater outlet 900 communicated with the built-in filter element 300;

The water to be filtered entering from the water inlet 700 enters the water inlet cavity 500, sequentially passes through the external filter element 400 and the internal filter element 300, enters the central tube 200 and flows out from the water outlet 800;

water that does not enter the center tube 200 forms wastewater that flows out of the wastewater port 900.

In some embodiments, tap water or other water supply system is connected with the water inlet 700, water to be filtered enters the water inlet cavity 500 from the water inlet 700, passes through the external filter element 400 under the action of water pressure, and flows from bottom to top, passes through the external filter element 400, flows to the internal filter element 300, and flows into the central tube 200 through the internal filter element 300 because the water inlet 700 is arranged at the lower end of the shell 100; the central tube 200 is provided with a plurality of through holes, and pure water filtered by the built-in filter 300 enters the central tube 200 and flows out of the water outlet 800.

Referring to fig. 1, a general water inlet 700, a water outlet 800, and a waste gate 900 are all provided at one end of the housing 100 remote from the opening.

After the water flows upward to a certain extent, the water moves downward along the built-in filter 300 without entering the center tube 200, and continues to flow downward until the water flows out of the waste water port 900, i.e., the purification of the water is completed.

This composite filter core adopts built-in filter core 300 and external filter core 400 to overlap in proper order and establishes the structure on the center tube 200, has avoided upper and lower little filter core structure promptly, leads to upper casing and lower casing welding one whole, and the easy problem that leaks of welding place after using a period, compares in prior art, adopts built-in filter core 300 and external filter core 400 to overlap in proper order and establishes the waterway structure of structure on the center tube 200 simpler, and processing is convenient, excellent in use effect.

Referring to fig. 2, in an alternative embodiment, a bottom mount is provided at an end of the housing 100 remote from the opening;

a water outlet pipe 110 corresponding to the positioning shaft 102 is arranged on the bottom mounting seat, and the water outlet pipe 110 is communicated with the water outlet 800;

The bottom mounting seat is sequentially sleeved outside the water outlet pipe 110 and provided with an internal mounting seat 120 for mounting the internal filter element 300 and an external mounting seat 130 for mounting the external filter element 400;

A drainage cavity 140 for wastewater to flow into the wastewater port 900 is arranged between the built-in mounting seat 120 and the water outlet pipe 110.

In an alternative embodiment, a diversion cavity 600 is formed between the built-in mounting base 120 and the inner wall of the housing 100, and the diversion cavity 600 communicates with the water inlet cavity 500.

In order to firmly fix the central tube 200, the built-in filter element 300 and the external filter element 400 in the housing 100, a bottom mounting seat is arranged in the housing 100, a water outlet pipe 110 on the bottom mounting seat corresponds to a positioning pipe, the water outlet pipe 110 is inserted into the central tube 200, and the positioning shaft 102 is fixed at the other end of the central tube 200, so that the central tube 200 is ensured to be positioned in the center of the housing 100; the base mount has an inner mount 120 for securing the inner cartridge 300 and an outer mount 130 for securing the outer cartridge 400.

A drainage chamber 140 is formed between the built-in mount 120 and the water outlet pipe 110, and when the wastewater in the built-in filter 300 flows toward the built-in mount 120, it finally flows into the drainage chamber 140 and then flows out through a wastewater port 900 communicating with the drainage chamber 140.

The height of the internal mount 120 is generally lower than the external mount 130; namely, a diversion cavity 600 is formed between the inner mounting seat 120 and the inner wall of the shell 100, water entering from the water inlet 700 flows into the diversion cavity 600, flows into the filter cavity along the diversion cavity 600, and water entering the external filter element 400 continues to flow upwards under the action of pressure, is filtered by the external filter element 400, and enters the internal filter element 300; because the upward resistance of the built-in filter 300 is smaller than the resistance of the transverse flow, most of the water after entering the built-in filter 300 flows upward, flows to the upper end of the built-in filter 300 and then flows transversely, flows downwards along the built-in filter 300, and enters the central tube 200 after being filtered in the process of flowing downwards, and enters the central tube 200 from the through hole of the central tube 200.

Referring to fig. 1 and 3, in an alternative embodiment, the external filter cartridge 400 includes an inner layer and an outer layer sleeved on the inner layer, and an external filtering membrane set is disposed between the outer layer and the inner layer.

In an alternative embodiment, the composite filter element comprises a first PP cotton layer 401, an activated carbon and scale inhibitor mixed layer 402 and a second PP cotton layer 403 which are sequentially stacked from bottom to top.

In some embodiments, the external filtration membrane comprises an outer layer and an inner layer, both formed from PP cotton; an external filtering membrane group formed by winding the composite filter element around the inner layer is arranged between the outer layer and the inner layer.

The first PP cotton layer 401 of the composite filter element is generally formed by spraying PP melt-blown materials, and the thickness of the first PP cotton layer 401 is generally 0.3-1mm; adding granular activated carbon and a scale inhibitor on the first PP cotton layer 401; then spraying a second PP cotton layer 403 to form the composite filter element.

The composite filter element is wound along the inner layer to form an external filter membrane group, and the active carbon, the scale inhibitor and the NPP cotton layer can be continuously and sequentially added on the second PP cotton layer 403 to form the composite filter element with more layers.

Referring to FIGS. 1, 4 and 5, in an alternative embodiment, the built-in filter cartridge 300 is formed by winding a built-in filter membrane group of n (n.gtoreq.1) groups around the central tube 200.

The built-in filter 300 may be formed of a plurality of built-in filtering membrane groups wound around the central tube, and preferably, the built-in filter 300 is formed of 1,2 or 3 built-in filtering membrane groups wound around the central tube 200.

In an alternative embodiment, the built-in filtration membrane group comprises a concentrated water separation net layer 301, a first reverse osmosis membrane layer 302, a carbon fiber layer 303 and a second reverse osmosis membrane layer 304, wherein the concentrated water separation net layer 301 is arranged at the bottom layer of the built-in filtration membrane group; the carbon fiber layer 303 is arranged between the first reverse osmosis membrane layer 302 and the second reverse osmosis membrane layer 304, the desalination layer of the second reverse osmosis membrane layer 304 is away from the carbon fiber layer 303, the desalination layer of the first reverse osmosis membrane layer 302 is provided with glue, and the first reverse osmosis membrane layer 302 is fixedly connected with the second reverse osmosis membrane layer 304 through the glue.

In an alternative embodiment, the carbon fiber layer 303 includes carbon fiber sheets, or the carbon fiber layer 303 is a layer structure formed by splicing carbon fiber sheets and activated carbon.

The carbon fiber layer 303 can also be a layer structure formed by splicing carbon fiber sheets with other materials according to actual requirements.

The water flow can be filtered by the first reverse osmosis membrane layer 302 and the second reverse osmosis membrane layer 304, the pure water obtained after filtering flows to the carbon fiber layer 303, the pure water is filtered again by the carbon fiber layer 303, and the concentrated water obtained after filtering is led out of the built-in filter element 300 through the concentrated water separation net. Pure water filtered by the carbon fiber layer 303 flows to the central tube 200 through the through holes of the central tube 200, and is discharged out of the composite filter element through the central tube 200.

One end of the dense water separation net layer 301 in the built-in filtering membrane group is fixedly connected with the side wall without the through hole of the central tube 200, and then the built-in filtering membrane group is rolled by taking the central tube 200 as the center according to the rolling direction, so as to obtain the built-in filter element 300. Because the carbon fiber layer 303 is formed by a layer structure formed by splicing carbon fiber sheets and activated carbon, after being wound on the central tube 200, an activated carbon layer is formed outside the central tube 200; by using the carbon fiber layer 303 as the post-carbon in this way, the taste of pure water filtered by the reverse osmosis membrane layer can be adjusted. The manner in which one end of the dense water separation net layer 301 in the built-in filtration membrane group is fixedly connected to the sidewall of the central tube 200 without a through hole may include, but is not limited to: hot pressing, bonding and the like.

Referring to fig. 5, the operating principle of the built-in filter 300 is as follows:

Raw water is filtered by the reverse osmosis membrane layer, pure water obtained after the filtration by the reverse osmosis membrane layer is filtered by the carbon fiber layer 303 and concentrated water obtained by the drainage is finally discharged through the central pipe 200, and pure water obtained by the filtration by the carbon fiber layer 303 flows to the central pipe 200.

The composite filter element provided by the invention adopts the structure that the built-in filter element 300 and the external filter element 400 are sequentially sleeved on the central tube 200, namely, the structure of an upper small filter element and a lower small filter element is avoided, so that the upper shell and the lower shell are welded into a whole, and the welding part is easy to leak water after a period of use; and the shell is an integral body, no welding part exists, and the problem of water leakage is solved.

The carbon fiber layer 303 can reach the effect of the existing post-carbon filter element, the active carbon component or the active carbon filter element is not required to be additionally arranged at the rear end of pure water outlet of the composite filter element, the space utilization rate of the composite filter element can be improved, the miniaturization design of the composite filter element can be facilitated, the energy conservation, emission reduction and environmental protection are facilitated, additional devices are not required, and the assembly difficulty is small.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The composite filter element is characterized by comprising a shell (100), wherein a filter cavity is arranged in the shell (100), and a central tube (200) is arranged in the filter cavity;

An opening communicated with the filter cavity is formed in one end of the shell (100), a cover plate (101) for sealing the opening is arranged in the opening, and a positioning shaft (102) is arranged in the center of the cover plate (101); one end of the central tube (200) is fixed on the positioning shaft (102);

an internal filter element (300) and an external filter element (400) are sequentially sleeved on the central tube (200); a water inlet cavity (500) is formed between the external filter element (400) and the inner wall of the shell (100);

A water inlet (700) communicated with the water inlet cavity (500), a water outlet (800) communicated with the central pipe (200) and a wastewater outlet (900) communicated with the built-in filter element (300) are arranged on the shell (100);

the water to be filtered entering from the water inlet (700) enters the water inlet cavity (500), sequentially passes through the external filter element (400) and the internal filter element (300), enters the central tube (200) and flows out from the water outlet (800);

Water that does not enter the center tube (200) forms wastewater that flows out of the wastewater port (900);

A bottom mounting seat is arranged at one end, far away from the opening, of the shell (100);

A water outlet pipe (110) corresponding to the positioning shaft (102) is arranged on the bottom mounting seat, and the water outlet pipe (110) is communicated with the water outlet (800);

an inner installation seat (120) for installing an inner filter element (300) and an outer installation seat (130) for installing an outer filter element (400) are sequentially sleeved outside the water outlet pipe (110) on the bottom installation seat;

A drainage cavity (140) for wastewater to flow into a wastewater port (900) is arranged between the built-in mounting seat (120) and the water outlet pipe (110);

The external filter element (400) comprises an inner layer and an outer layer sleeved on the inner layer, and an external filter membrane group is arranged between the outer layer and the inner layer;

the external filtering membrane group is formed by winding the inner layer by a composite filter element;

The composite filter element comprises a first PP cotton layer (401), an active carbon and scale inhibitor mixed layer (402) and a second PP cotton layer (403) which are sequentially overlapped from bottom to top;

The built-in filtering membrane group comprises a concentrated water separation net layer (301), a first reverse osmosis membrane layer (302), a carbon fiber layer (303) and a second reverse osmosis membrane layer (304), wherein the concentrated water separation net layer (301) is arranged at the bottom layer of the built-in filtering membrane group; the carbon fiber layer (303) is arranged between the first reverse osmosis membrane layer (302) and the second reverse osmosis membrane layer (304), a desalting layer of the second reverse osmosis membrane layer (304) deviates from the carbon fiber layer (303), glue is arranged on a desalting layer of the first reverse osmosis membrane layer (302), and the first reverse osmosis membrane layer (302) and the second reverse osmosis membrane layer (304) are fixedly connected through the glue.

2. The composite filter cartridge of claim 1, wherein a flow directing cavity (600) is formed between the built-in mounting seat (120) and an inner wall of the housing (100), and the flow directing cavity (600) is in communication with the water inlet cavity (500).

3. The composite filter element of claim 1, wherein the built-in filter element (300) is formed by winding a built-in filter membrane group of n (n.gtoreq.1) groups around the central tube (200).

4. A composite filter element according to claim 1, wherein the carbon fibre layer (303) comprises carbon fibre sheets or the carbon fibre layer (303) is a layer structure of carbon fibre sheets spliced with activated carbon.

5. A water purifier comprising the composite filter element of any one of claims 1-4.