CN220723629U - Composite filter element and water purifying device comprising same - Google Patents

Abstract

The utility model relates to the technical field of water purifying equipment, in particular to a composite filter element and a water purifying device comprising the same. The composite filter element comprises a first shell, a second shell, a rear filter element, a water permeable pipe, a reverse osmosis membrane core, a third shell and a connecting piece. The third shell is sleeved on the outer side of the second shell and is positioned on one side of the reverse osmosis membrane core; one side end of the connecting piece is sleeved at the concentrated water end of the reverse osmosis membrane core, and the other side end of the connecting piece is simultaneously connected with the second shell and the third shell in a sealing way; a first clearance runner is formed between the outer walls of the third shell and the reverse osmosis membrane core and the inner wall of the first shell; a second clearance flow channel is formed between the inner wall of the third shell and the outer wall of the second shell; one end of the second clearance runner is communicated with the concentrated water end of the reverse osmosis membrane core through the connecting piece, and one end of the permeable pipe is communicated with the water inlet end of the second shell through the connecting piece, so that the sealing stability between the reverse osmosis membrane core and the second shell and between the reverse osmosis membrane core and the third shell are improved.

Description

Composite filter element and water purifying device comprising same

Technical Field

The utility model relates to the technical field of water purifying equipment, in particular to a composite filter element and a water purifying device comprising the same.

Background

The water purifier adopts the reverse osmosis filter element to filter and produce the purified water, and the water purifier is provided with the rear filter element to improve the taste of the purified water. The reverse osmosis component and the post-component are generally integrated into a composite filter element with an integrated structure so as to reduce the occupation of excessive space inside the water purifier by the reverse osmosis filter element and the post-component.

However, the joint between the reverse osmosis filtering component and the rear filtering component in the existing composite filter element generally adopts a waterproof adhesive tape surrounding sealing connection mode, the sealing of the connection mode is weak, the sealing performance is poor, the joint is unstable and easy to leak water, and the water outlet stability of the composite filter element is affected, so that the user experience is poor.

Accordingly, there is a need in the art for a new composite filter cartridge that addresses the above-described problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely the problem of poor connection performance between a reverse osmosis component and a rear component in the existing composite filter element.

In a first aspect, the present utility model provides a composite filter cartridge comprising: a first shell provided with a raw water port, a water purifying port and a water concentrating port; the rear filter assembly comprises a second shell and a rear filter core positioned in the second shell, and the water outlet end of the second shell is communicated with the water purifying port; the reverse osmosis filtration assembly comprises a water permeable pipe and a reverse osmosis membrane core wound on the circumferential direction of the water permeable pipe; a third casing sleeved outside the second casing and positioned at one side of the reverse osmosis membrane core; one side end of the connecting piece is sleeved at the concentrated water end of the reverse osmosis membrane core, and the other side end of the connecting piece is simultaneously connected with the second shell and the third shell in a sealing way; wherein a first clearance flow channel is formed between the outer wall of the third shell and the outer wall of the reverse osmosis membrane core and the inner wall of the first shell; a second clearance flow channel is formed between the inner wall of the third shell and the outer wall of the second shell; the first gap flow channel is communicated with the raw water port, one end of the second gap flow channel is communicated with the concentrated water end of the reverse osmosis membrane core through the connecting piece, and the other end of the second gap flow channel is communicated with the concentrated water port; one end of the water permeable pipe is communicated with the water inlet end of the second shell through the connecting piece.

In the preferable technical scheme of the composite filter element, the connecting piece comprises a first step part, a second step part and an annular flanging which are sequentially arranged; the connecting piece is provided with a central pore canal penetrating through the first step part and the second step part, and the outer wall of the first step part is in sealing connection with the inner wall of the second shell; the outer wall of the second step part is in sealing connection with the inner wall of the third shell; the central pore canal is in sealing connection with one end of the permeable pipe, the annular flanging is sleeved at the concentrated water end of the reverse osmosis membrane core, the second step part is provided with a permeable hole, and the concentrated water end of the reverse osmosis membrane core is communicated with one end of the second clearance flow channel through the permeable hole.

In the preferable technical solution of the composite filter element, the composite filter element further includes a support member, and the support member is located between the inner wall of the first housing and the connecting member.

In a preferred embodiment of the above composite filter element, the support member is a protrusion formed on the annular flange.

In the above preferred technical solution of the composite filter element, the number of the protrusions is at least two, and the two protrusions are uniformly distributed along the circumferential direction of the annular flanging.

In the above preferred technical solution of the composite filter element, the rear filter element is of a cylindrical structure, a third gap flow channel is formed between an outer wall of the cylindrical structure and an inner wall of the second housing, one end of the third gap flow channel is communicated with a water inlet end of the second housing, and a cavity of the cylindrical structure is communicated with a water outlet end of the second housing.

In the above preferred technical solution of the composite filter element, the post-filter assembly further includes a first end cap and a second end cap, and the first end cap and the second end cap clamp and fix the post-filter element.

In the above preferred technical solution of the composite filter element, a first sealing ring is disposed between the outer wall of the first step portion and the inner wall of the second housing.

In the above preferred technical solution of the composite filter element, a second sealing ring is disposed between the outer wall of the second step portion and the inner wall of the third housing.

In a second aspect, the present utility model also provides a water purification device comprising a composite filter cartridge as described in any one of the preceding claims.

As will be appreciated by those skilled in the art, the filter cartridge of the present utility model includes a first housing, a post-filter assembly, a reverse osmosis filter assembly, a third housing, and a connector. The first shell is provided with a raw water port, a water purifying port and a water concentrating port; the rear filter assembly comprises a second shell and a rear filter element positioned in the second shell, and the water outlet end of the second shell is communicated with the water purifying port; the reverse osmosis filtering component comprises a permeable pipe and a reverse osmosis membrane core wound on the periphery of the permeable pipe; the third shell is sleeved on the outer side of the second shell and is positioned on one side of the reverse osmosis membrane core; one side end of the connecting piece is sleeved at the concentrated water end of the reverse osmosis membrane core, and the other side end of the connecting piece is simultaneously connected with the second shell and the third shell in a sealing way. Wherein, a first clearance flow channel is formed between the outer wall of the third shell and the outer wall of the reverse osmosis membrane core and the inner wall of the first shell; a second clearance flow channel is formed between the inner wall of the third shell and the outer wall of the second shell; the first gap flow channel is communicated with the raw water port, one end of the second gap flow channel is communicated with the concentrated water end of the reverse osmosis membrane core through a connecting piece, and the other end of the second gap flow channel is communicated with the concentrated water port; one end of the water permeable pipe is communicated with the water inlet end of the second shell through the connecting piece. Through such setting, with the help of connecting piece with second casing, third casing and reverse osmosis membrane core sealing connection, improved the sealing steadiness between rear-mounted filtration subassembly and the reverse osmosis filtration subassembly.

Further, the connecting piece comprises a first step part, a second step part and an annular flanging which are sequentially arranged; the connecting piece is provided with a central pore canal penetrating through the first step part and the second step part, and the outer wall of the first step part is in sealing connection with the inner wall of the second shell; the outer wall of the second step part is in sealing connection with the inner wall of the third shell; the central pore canal is in sealing connection with one end of the permeable pipe, the annular flanging is sleeved at the concentrated water end of the reverse osmosis membrane core, the second step part is provided with a permeable hole, and the concentrated water end of the reverse osmosis membrane core is communicated with one end of the second clearance flow passage through the permeable hole. Through the arrangement, the second shell and the third shell are connected in a sealing mode through the first step part and the second step, the reverse osmosis membrane core of the reverse osmosis filtering assembly is connected with the water permeable pipe in a sealing mode through the annular flanging and the central pore canal, and sealing assembly among the second shell, the third shell and the reverse osmosis membrane core is simplified.

Further, the composite filter element further comprises a support member positioned between the inner wall of the first housing and the connecting member. Through this arrangement, the installation stability of post filter component and reverse osmosis filter component in the first casing after sealing connection has been strengthened.

In addition, the water purifying device further provided by the utility model based on the technical scheme adopts the composite filter element, so that the water purifying device has the technical effect of the composite filter element, and the stability of the composite filter element of the water purifying device is better than that of the conventional water purifying device.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the internal structure of a first preferred embodiment of the composite filter element of the utility model;

FIG. 2 is a schematic view of the structure of the connecting member in the first preferred embodiment of the composite filter element of the utility model;

FIG. 3 is a schematic view of the internal structure of a second preferred embodiment of the composite filter element of the utility model;

FIG. 4 is a schematic view of the construction of a connector in a second preferred embodiment of the composite filter element of the utility model;

fig. 5 is a schematic view of the overall structure of the composite filter element of the present utility model.

List of reference numerals:

1. a first housing; 11. a water purifying port; 12. a raw water gap; 13. a water concentration port; 14. a first gap flow path; 21. a reverse osmosis membrane core; 22. a water permeable pipe; 221. a through hole; 31. a rear filter element; 311. a first end cap; 312. a second end cap; 32. a second housing; 321. a third gap flow path; 33. a third housing; 331. a second gap flow path; 4. a connecting piece; 41. a first step portion; 42. a second step portion; 421. a water permeable hole; 43. annular flanging; 44. a central aperture; 45. a protrusion; 51. a first seal ring; 52. a second seal ring; 53. a third seal ring; 6. an annular sealing band.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "inner," "outer," "top," "bottom," and the like indicate directional or positional relationships, and are based on the directional or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The problem of poor connection performance between a reverse osmosis component and a rear component in the existing composite filter element based on the background technology is pointed out. The utility model provides a composite filter element, which aims to increase the tightness and stability of connection between a reverse osmosis filter assembly and a rear filter assembly through a connecting piece and improve user experience.

Specifically, as shown in fig. 1 to 5, the composite filter element of the present utility model includes a first housing 1, a post-filtration assembly, a reverse osmosis filtration assembly, a third housing 33, and a connecting member 4. The reverse osmosis filter assembly and the post-filter assembly are arranged in series in the chamber of the first housing 1. Wherein, one end of the first shell 1 is provided with a raw water gap 12, a clean water gap 11 and a concentrated water gap 13.

As shown in fig. 1 to 4, the post-filter assembly of the present utility model is located in an upper region of the chamber of the first housing 1, and the post-filter assembly includes a second housing 32 and a post-filter core 31 located in the second housing 32, wherein a water outlet end of the second housing 32 is communicated with the water purifying port 11, and the post-filter core 31 adopts an activated carbon core. The reverse osmosis filtration module is located in a lower region of the chamber of the first housing 1, and includes a water permeable tube 22 and a reverse osmosis membrane core 21 wound around the circumference of the water permeable tube 22, and a plurality of through holes 221 are provided along the axial direction of the water permeable tube 22. The third casing 33 is sleeved outside the second casing 32 and the third casing 33 is located at the upper end of the reverse osmosis membrane core 21. Wherein, the lower side end of the connecting piece 4 is sleeved on the concentrated water end (upper side position) of the reverse osmosis membrane core 21, and the upper side end of the connecting piece 4 is simultaneously connected with the lower ends of the second shell 32 and the third shell 33 in a sealing way.

As shown in fig. 1 to 4, more specifically, a first gap flow path 14 is formed between the outer wall of the third casing 33 and the outer wall of the reverse osmosis membrane core 21 and the inner wall of the first casing 1, and the first gap flow path 14 communicates with the raw water port 12. A second gap flow passage 331 is formed between the inner wall of the third shell 33 and the outer wall of the second shell 32, one end of the second gap flow passage 331 is communicated with the concentrated water end of the reverse osmosis membrane core 21 through a connecting piece 4, and the other end of the second gap flow passage 331 is communicated with the concentrated water port 13; one end of the water permeable pipe 22 communicates with the water inlet end of the second housing 32 through the connecting member 4.

In this way, after the post-filtration module and the reverse osmosis filtration module can be connected in a sealing manner by means of the connecting piece 4, the stability of the sealing connection between the reverse osmosis membrane core 21 and the second casing 32 and the third casing 33 is greatly enhanced.

As shown in fig. 1 to 2, the connecting member 4 of the present utility model has an annular cover-like structure, and the connecting member 4 includes a first step portion 41, a second step portion 42, and an annular flange 43 which are arranged in this order; wherein the connecting piece 4 is provided with a central pore canal 44 penetrating through a first step part 41 and a second step part 42, and the outer wall of the first step part 41 is in sealing connection with the inner wall of the second shell 32; the outer wall of the second step portion 42 is hermetically connected with the inner wall of the third housing 33; the central pore canal 44 is connected with one end of the permeable tube 22 in a sealing way, the annular flange 43 is sleeved on the concentrated water end of the reverse osmosis membrane core 21, the second step part 42 is provided with a permeable hole 421, and the concentrated water end of the reverse osmosis membrane core 21 is communicated with the lower end of the second gap flow passage 331 through the permeable hole 421.

In the first preferred embodiment, as shown in fig. 1 to 2, the first step portion 41, the second step portion 42, and the annular flange 43 on the connecting member 4 are arranged in this order from top to bottom. The annular flange 43 extends downwards along the central axis of the connecting piece 4. A first seal ring 51 is provided between the outer wall of the first step portion 41 and the inner wall of the second housing 32, and the number of the first seal rings 51 is two. A second seal ring 52 is provided between the outer wall of the second step portion 42 and the inner wall of the third housing 33. The number of second seal rings 52 is one. The central pore canal 44 of the connecting piece 4 and the upper end of the permeable tube 22 are provided with two third sealing rings 53, and the number of the third sealing rings 53 is two. The number of the water permeable holes 421 is four, and the four water permeable holes 421 are uniformly distributed along the circumferential direction of the second step portion 42.

Preferably, as shown in fig. 1, an annular sealing band 6 can be further arranged between the annular flange 43 and the water-rich end of the reverse osmosis membrane core 21. The annular flange 43 and the reverse osmosis membrane core 21 are covered by the annular sealing belt 6, and the annular sealing belt 6 can better isolate raw water in the first gap flow channel 14 from concentrated water at the concentrated water end of the reverse osmosis membrane core 21, so that the concentrated water is prevented from flowing back and seeping into the first gap flow channel 14. The annular sealing band 6 can be formed by winding a waterproof sealing tape.

It should be noted that, according to practical applications, those skilled in the art may set the number of the water permeable holes 421 to 2, or set the number of the water permeable holes 421 to 6 or more, and such flexible adjustment and modification of the number of the water permeable holes 421 should be limited within the scope of the present utility model without departing from the principle and scope of the present utility model.

Preferably, as shown in fig. 1 to 5, the rear filter element 31 of the present utility model has a cylindrical structure, a third gap flow channel 321 is formed between the outer wall of the cylindrical structure and the inner wall of the second housing 32, one end of the third gap flow channel 321 is communicated with the water inlet end of the second housing 32, and the chamber of the cylindrical structure is communicated with the water outlet end of the second housing 32. The post-filter assembly further comprises a first end cover 311 and a second end cover 312, and the first end cover 311 and the second end cover 312 clamp and fix the post-filter core 31.

Illustratively, as shown in fig. 1 to 5, the first end cap 311 and the second end cap 312 clamp and fix the post-filter element 31 from the upper and lower ends, respectively. When the purified water flows in from the water inlet end below the second housing 32 in the water permeable pipe 22, the purified water is shunted to the outer side of the rear filter core 31 through the third gap runner 321, the purified water is filtered along the radial direction of the rear filter core 31 and collected in the cavity of the rear filter core 31, and the filtered purified water flows to the purified water port 11 on the first housing 1 along the water outlet end of the second housing 32.

It should be noted that, according to practical applications, those skilled in the art may use the mineralization core to add minerals in the purified water to the post-filter core 31, and such material selection and modification of the post-filter core 31 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

In a second preferred embodiment, as shown in fig. 3 to 4, the composite filter cartridge of the utility model further comprises a support member, which is located between the inner wall of the first housing 1 and the connecting member 4.

Illustratively, as shown in fig. 3-4, the support of the present utility model is a boss 45 formed on the annular flange 43. The number of the protrusions 45 is two, and the two protrusions 45 are symmetrically distributed on the annular flange 43 of the connecting piece 4. In this way, the connection 4 between the reverse osmosis filter element and the downstream filter element is secured in the first gap flow channel by means of the projections 45, and the assembly connection between the reverse osmosis filter element and the downstream filter element and the connection 4 in the first housing 1 is more secure.

It should be noted that, according to practical applications, the number of the supporting members may be set to 3 or more by those skilled in the art, and such flexible adjustment and modification of the number of the supporting members do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.

When the composite filter element is used for preparing water, raw water enters the first gap runner 14 through the raw water port 12 and is shunted to the outer wall of the reverse osmosis membrane core 21. Under the action of water pressure, raw water radially permeates into the cavity of the water permeable tube 22 along the reverse osmosis membrane core 21 to form purified water. The purified water is collected into the permeable pipe 22 through the through holes on the permeable pipe 22, then flows into the water inlet end of the second shell 32 along the upper end of the permeable pipe 22, enters the second shell 32, is filtered by the rear filter element 31, and flows to the water purifying port 11 through the water outlet end of the second shell 32 to be discharged. The water flow which does not enter the water permeable pipe 22 flows out along the upper end of the reverse osmosis membrane core 21 to form concentrated water, and the concentrated water is directly discharged to the concentrated water port 13 along the second gap flow passage 331 through the water permeable hole 421 on the connection.

Finally, the utility model also provides a water purifying device which comprises the composite filter element.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. A composite filter cartridge, comprising:

a first shell (1) provided with a raw water port (12), a purified water port (11) and a concentrated water port (13);

a rear filter assembly comprising a second housing (32) and a rear filter element (31) positioned in the second housing (32), wherein the water outlet end of the second housing (32) is communicated with the water purifying port (11);

a reverse osmosis filtration module comprising a water permeable tube (22) and a reverse osmosis membrane core (21) wound around the water permeable tube (22) in the circumferential direction;

a third casing (33) which is sleeved outside the second casing (32) and the third casing (33) is positioned at one side of the reverse osmosis membrane core (21); and

one side end of the connecting piece (4) is sleeved at the concentrated water end of the reverse osmosis membrane core (21), and the other side end of the connecting piece (4) is simultaneously connected with the second shell (32) and the third shell (33) in a sealing way;

wherein a first clearance runner (14) is formed between the outer wall of the third shell (33) and the outer wall of the reverse osmosis membrane core (21) and the inner wall of the first shell (1); a second clearance flow passage (331) is formed between the inner wall of the third shell (33) and the outer wall of the second shell (32); the first gap flow channel (14) is communicated with the raw water port (12), one end of the second gap flow channel (331) is communicated with the concentrated water end of the reverse osmosis membrane core (21) through the connecting piece (4), and the other end of the second gap flow channel (331) is communicated with the concentrated water port (13); one end of the water permeable pipe (22) is communicated with the water inlet end of the second shell (32) through the connecting piece (4).

2. The composite filter element according to claim 1, wherein the connecting piece (4) comprises a first step (41), a second step (42) and an annular collar (43) arranged in sequence; wherein the connecting piece (4) is provided with a central pore canal (44) penetrating through the first step part (41) and the second step part (42), and the outer wall of the first step part (41) is in sealing connection with the inner wall of the second shell (32); the outer wall of the second step part (42) is in sealing connection with the inner wall of the third shell (33); the central pore canal (44) is in sealing connection with one end of the permeable pipe (22), the annular flanging (43) is sleeved at the concentrated water end of the reverse osmosis membrane core (21), the second step part (42) is provided with a permeable hole (421), and the concentrated water end of the reverse osmosis membrane core (21) is communicated with one end of the second clearance runner (331) through the permeable hole (421).

3. A composite filter element according to claim 2, further comprising a support member located between the inner wall of the first housing (1) and the connecting member (4).

4. A composite filter element according to claim 3, wherein the support member is a projection (45) formed on the annular flange (43).

5. A composite filter element according to claim 4, wherein the number of protrusions (45) is at least two, both protrusions (45) being evenly distributed along the circumference of the annular bead (43).

6. The composite filter element according to claim 1, wherein the rear filter element (31) is of a cylindrical structure, a third clearance flow passage (321) is formed between an outer wall of the cylindrical structure and an inner wall of the second housing (32), one end of the third clearance flow passage (321) is communicated with a water inlet end of the second housing (32), and a chamber of the cylindrical structure is communicated with a water outlet end of the second housing (32).

7. The composite filter element of claim 1, wherein the post-filter assembly further comprises a first end cap (311) and a second end cap (312), the first end cap (311) and the second end cap (312) clamping the post-filter element (31) in place.

8. A composite filter element according to claim 2, wherein a first sealing ring (51) is provided between the outer wall of the first step (41) and the inner wall of the second housing (32).

9. A composite filter element according to claim 2, wherein a second sealing ring (52) is provided between the outer wall of the second step (42) and the inner wall of the third housing (33).

10. A water purification device comprising a composite filter element according to any one of claims 1 to 9.