CN111495004A - Composite filter element and water purification equipment - Google Patents

Abstract

The invention discloses a composite filter element and water purification equipment, wherein the composite filter element comprises: a filter element joint; the upper end of the outer barrel is communicated with the filter element joint; the inner barrel is arranged in the outer barrel, the upper end of the inner barrel is communicated with the filter element joint, the bottom end of the inner barrel is open and is spaced from the bottom wall surface of the outer barrel, and a gap is formed between the outer wall surface of the inner barrel and the inner wall surface of the outer barrel to form a water inlet channel; the separating disc is arranged in the outer barrel and provided with a first mounting surface and a second mounting surface which are opposite, the bottom end of the inner barrel is hermetically connected with the first mounting surface, so that a first filtering cavity and a second filtering cavity which are independent from each other are formed in the outer barrel, the first filtering cavity is arranged in the inner barrel, the second filtering cavity is arranged outside the inner barrel, and the water inlet channel forms a part of the second filtering cavity; the filter comprises a first filter element and a second filter element, wherein the first filter element is positioned in the first filter cavity, and the second filter element is positioned in the second filter cavity.

Description

Composite filter element and water purification equipment

This application is a divisional application with the application number "201710223346.1" and the invention name "composite filter element and water purification equipment".

technical field

The invention relates to the field of water purification equipment, in particular to a composite filter element and water purification equipment.

Background technique

With the development of society, people's requirements for water quality are getting higher and higher. In water purification equipment, composite filter elements are generally equipped with a variety of filter elements, which have better filtration effect and are widely used. However, in the current composite filter element, the composite filter element has only one set of water inlets. If the water quality of multiple waterways needs to be filtered separately, multiple composite filter elements need to be installed, causing a lot of inconvenience. A variety of water quality filtration needs.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a composite filter element, which is intended to have two mutually independent filtration channels to meet the user's filtration requirements for various water quality.

In order to achieve the above object, the composite filter element proposed by the present invention is used for water purification equipment, and the composite filter element includes:

filter connector;

an outer barrel, the upper end of which is communicated with the filter element joint;

The inner barrel is arranged in the outer barrel, the upper end of the inner barrel is communicated with the filter element joint, the bottom end of the inner barrel is open, and there is a space between it and the bottom wall of the outer barrel, the inner barrel There is a gap between the outer wall surface of the outer barrel and the inner wall surface of the outer barrel to form a water inlet channel;

A dividing plate is arranged in the outer tub, the dividing plate has a first mounting surface and a second mounting surface arranged oppositely, and the bottom end of the inner tub is sealed with the first mounting surface, so that the outer tub is sealed A first filter cavity and a second filter cavity which are independent of each other are formed inside, the inside of the inner barrel is a first filter cavity, the outside of the inner barrel is a second filter cavity, and the water inlet channel constitutes a part of the second filter cavity;

The first filter element is cylindrical and located in the inner barrel, the lower end of the first filter element is sealed against the first installation surface, and the first filter cavity is formed in the first filter cavity and corresponding to the outer side of the first filter element. a first water inlet cavity, a first water outlet cavity is formed in the first filter cavity and corresponding to the inner side of the first filter element; and,

The second filter element is arranged in the second filter cavity and below the separation plate.

Optionally, an upper end cover is also provided between the first filter element and the upper end of the inner barrel, and the upper end of the first filter element is sealed with the upper end cover, so that the inside and outside of the first filter element are isolated from each other, thereby forming an upper end cap. the first water inlet cavity and the first water outlet cavity.

Optionally, the upper side surface of the upper end cover and the inner side surface of the top end of the inner tub have a water passage, and the water passage communicates with the first water inlet cavity.

Optionally, the composite filter element further includes a central pipe, and the central pipe is sealed and penetrated through the separation disc in the up-down direction, so as to communicate with the inner space of the second filter element and the filter element joint.

Optionally, there is a gap between the inner side of the first filter element and the outer side of the central pipe to form the first water outlet cavity.

Optionally, an upper cover joint is further provided on the upper end cover, and the upper cover joint communicates the first water outlet cavity and the filter element joint.

Optionally, the inner tub is detachably connected or welded to the separating plate; and/or the filter element joint is detachably connected to the outer tub.

Optionally, the first installation surface is provided with a first annular sealing groove corresponding to the bottom end of the inner tub, and the bottom end of the inner tub is sealed and inserted in the first annular sealing groove.

Optionally, the first installation surface is provided with a first annular flange corresponding to the first filter element, and the inner side surface of the first annular flange is in abutment with the outer peripheral surface of the first filter element.

The present invention also proposes a water purification device, which includes, for example, a composite filter element, wherein the composite filter element includes:

filter connector;

an outer barrel, the upper end of which is communicated with the filter element joint;

The inner barrel is arranged in the outer barrel, the upper end of the inner barrel is communicated with the filter element joint, the bottom end of the inner barrel is open, and there is a space between it and the bottom wall of the outer barrel, the inner barrel There is a gap between the outer wall surface of the outer barrel and the inner wall surface of the outer barrel to form a water inlet channel;

A dividing plate is arranged in the outer tub, the dividing plate has a first mounting surface and a second mounting surface arranged oppositely, and the bottom end of the inner tub is sealed with the first mounting surface, so that the outer tub is sealed A first filter cavity and a second filter cavity which are independent of each other are formed inside, the inside of the inner barrel is a first filter cavity, the outside of the inner barrel is a second filter cavity, and the water inlet channel constitutes a part of the second filter cavity;

The first filter element is cylindrical and located in the inner barrel, the lower end of the first filter element is sealed against the first installation surface, and the first filter cavity is formed in the first filter cavity and corresponding to the outer side of the first filter element. a first water inlet cavity, a first water outlet cavity is formed in the first filter cavity and corresponding to the inner side of the first filter element; and,

The second filter element is arranged in the second filter cavity and below the separating plate.

The technical solution of the present invention is that the inner barrel and the partition plate are arranged in the outer barrel, and two mutually independent first filter chambers and second filter chambers are formed in the outer barrel, and the first filter chamber is located in the inner barrel, and the second filter chamber is located outside the inner barrel, The first installation surface on the partition plate is in sealing contact with the upper end of the first filter element, so that the first filter element in the first filter cavity and the second filter element in the second filter cavity respectively form independent filter channels, thereby realizing two types of filter channels. The separate filtration of water quality can meet the user's filtration needs for various water quality; because the composite filter element is integrated with two filtration channels, the number of composite filter elements used in the water purification equipment is reduced. The water connection, on the other hand, reduces the space requirements for the interior of the water purification equipment, which is conducive to reducing the volume of the water purification equipment to adapt to the development trend of light and small water purification equipment.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is an exploded view of an embodiment of a composite filter element of the present invention;

Fig. 2 is the filtration principle diagram of the composite filter element in Fig. 1;

Fig. 3 is a cross-sectional view of the composite filter element in Fig. 1;

Fig. 4 is the enlarged view of A place in Fig. 3;

FIG. 5 is a schematic structural diagram of a viewing angle of the partition disk in FIG. 1;

FIG. 6 is a schematic structural diagram of another viewing angle of the separating disk in FIG. 1;

FIG. 7 is a cross-sectional view of the partition tray of FIG. 1 .

Description of reference numbers:

label name label name 1 Composite filter element 40 Separator 10 Filter connector 40a first mounting surface 100 first filter chamber 311 Cover connector 101 first water inlet 40b second mounting surface 102 first water outlet 410 first annular seal groove 110 first water inlet 420 first annular flange 120 first water outlet 430 second annular flange 130 second water inlet 440 support bump 140 second water outlet 450 third annular flange 20 outer barrel 450a second annular seal groove 200 second filter chamber 460 via 201 Second water inlet 50 first filter element 202 The second water outlet 60 second filter element 203 water inlet channel 70 central tube 210 lower end cap 80 sealing ring 30 inner barrel 90 sealing cap 301 Inner barrel joint 91 Avoid holes 310 upper end cap

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The invention provides a composite filter element, which is suitable for water purification equipment.

In an embodiment of the present invention, referring to FIG. 1 to FIG. 3 , the composite filter element 1 includes:

Filter connector 10;

an outer barrel 20, the upper end of the outer barrel 20 is communicated with the filter element joint 10;

The inner barrel 30 is arranged in the outer barrel 20 , the upper end of the inner barrel 30 is communicated with the filter element joint 10 , and the bottom end of the inner barrel 30 is open and between the bottom wall of the outer barrel 20 . There is a gap, and there is a gap between the outer wall surface of the inner barrel 30 and the inner wall surface of the outer barrel 20;

The partition plate 40 is arranged in the outer tub 20, the partition plate 40 has a first installation surface 40a and a second installation surface 40b arranged opposite to each other, and the bottom end of the inner tub 30 and the first installation surface 40a are compatible with each other. Removably sealed connection;

The first filter element 50 is cylindrical and is located in the inner barrel 30, and the lower end of the first filter element 50 is in sealing contact with the first installation surface 40a; and

The second filter element 60 has a cylindrical shape and is disposed in the outer tub 20 and below the partition plate 40 . The upper end of the second filter element 60 is in sealing contact with the second installation surface 40b.

Specifically, in the composite filter element 1, the upper end of the outer barrel 20 is an open end, and the lower end thereof is a closed end. seal. The lower end of the inner barrel 30 is an open end, and the upper end of the inner barrel 30 is provided with an inner barrel joint 301 sealingly connected with the filter element joint 10. The inner barrel 30 enters the outer barrel 20 through the upper end of the outer barrel 20, and the height of the inner barrel 30 is less than the height of the outer barrel 20, and then The lower end of the inner barrel 30 and the bottom wall surface of the outer barrel 20 are spaced apart; the radial dimension of the inner barrel 30 is also smaller than the radial dimension of the outer barrel 20, and there is a gap between the outer wall surface of the inner barrel 30 and the inner wall surface of the outer barrel 20 . The partition plate 40 is fixed in the outer tub 20, and the first mounting surface 40a of the partition plate 40 seals the lower end of the inner tub 30, so that the inner tub 30 and the outer tub 20 form relatively independent first filter chambers 100 and second filter chambers 200 , wherein the inside of the inner barrel 30 is the first filter cavity 100 , and the outside of the inner barrel 30 is the second filter cavity 200 . The first filter element 50 is disposed in the first filter cavity 100 . At this time, the first filter element 50 is arranged in a cylindrical shape, and the lower end of the first filter element 50 is sealed against the first installation surface 40 a of the partition plate 40 , so that the first filter element 50 is sealed. The inner and outer sides of the filter element are isolated from each other, and the first filter element 50 and the inner wall of the inner tub 30 also have a gap. The second filter element 60 is disposed in the second filter cavity 200 and is located below the partition plate 40 . The upper end of the second filter element 60 is sealed against the second mounting surface 40 b of the partition plate 40 , so that the inner and outer parts of the second filter element 60 are sealed. Both sides are also set apart from each other.

It is worth noting that, in the above structure, the purpose of disposing the partition plate 40 is to: 1. to seal the lower end of the inner barrel 30, so that the first filter cavity 100 and the second filter cavity 200 which are independent of each other are formed in the outer barrel 20; 2. The partition plate 40 has a supporting effect on the inner barrel 30 and can prevent the inner barrel 30 from falling. Third, the first installation surface 40a of the partition plate 40 is in sealing contact with the lower end of the first filter element 50, and the second installation surface 40b is in contact with the upper end of the second filter element 60. A first water inlet cavity 101 and a first water outlet cavity 102 are formed in the first filter cavity 100 corresponding to the inner and outer sides of the first filter element 50, and the second filter cavity 200 corresponding to the inner and outer sides of the second filter element 60. A second water inlet cavity 201 and a second water outlet cavity 202 are formed on the sides to form their corresponding filter channels.

Through the above structure, the first filter chamber 100 and the second filter chamber 200 are respectively formed in the outer barrel 20 through the sealing cooperation between the partition plate 40 and the inner barrel 30 . At this time, the outer barrel 20 or the filter element joint 10 can be set corresponding to the first filter chamber 100 The first water inlet 110 and the first water outlet 120, and the second water inlet 130 and the second water outlet 140 are provided corresponding to the second filter cavity 200, so that the composite filter element 1 has the function of filtering the two different water quality at the same time, which improves the product quality. Use performance to enhance the market competitiveness of products. When the composite filter element 1 is applied to the water purification equipment, the number of the composite filter element 1 used in the water purification equipment can be effectively reduced, thereby reducing the space requirement inside the inner water purification equipment and reducing the volume of the water purification equipment, so as to adapt to the water purification equipment. The development trend of small and light equipment.

In this embodiment, the core material used by the first filter element 50 and/or the second filter element 60 is generally one or more of carbon rods, PP cotton or carbon fiber composite materials. It can be understood that in some embodiments, in order to To enhance the filtering effect of the first filter element 50 and/or the second filter element 60, the first filter element 50 and/or the second filter element 60 can also be formed by stacking multiple layers of core materials to improve the degree of filtration and purification.

The technical solution of the present invention is to form two mutually independent first filter chambers 100 and second filter chambers 200 in the outer barrel 20 by arranging the inner barrel 30 and the partition plate 40 in the outer barrel 20, and the first filter chamber 100 is located in the inner barrel 30, The second filter cavity 200 is located outside the inner barrel 30, and the first mounting surface 40a on the partition plate 40 is in sealing contact with the upper end of the first filter element 50, so that the first filter cavity 100 corresponds to the first filter element 50 and the second filter cavity 200 Corresponding to the second filter element 60, a separate filtration channel is formed, thereby realizing the separate filtration of two kinds of water quality, so as to meet the user's filtration requirements for various water quality; since the composite filter element 1 is integrated with two filtration channels, the net filter is reduced. The number of composite filter elements 1 used in the water equipment, on the one hand, simplifies the water connection inside the water purification equipment, on the other hand, reduces the space requirements inside the water purification equipment, which is conducive to reducing the volume of the water purification equipment to adapt to the purification equipment. The development trend of light and small water equipment.

Further, in this embodiment, referring to FIGS. 4 to 7 , a first annular sealing groove 410 is provided on the first mounting surface 40a of the above-mentioned partition plate 40 corresponding to the bottom end of the inner tub 30 , and the bottom end of the inner tub 30 is inserted into the first annular sealing groove 410 . In an annular sealing groove 410 , the detachable connection between the inner tub 30 and the partition plate 40 is achieved by means of sealing insertion at this time, and the effect of the partition plate 40 sealing the lower end of the inner tub 30 is achieved. Preferably, a sealant or a sealing coating can be provided in the first annular sealing groove 410 to further reduce the assembly gap between the first annular sealing groove 410 and the barrel wall of the inner tub 30 to achieve a better sealing effect. Of course, the present invention is not limited to this, and in other embodiments, the lower end of the inner tub 30 can also be sealed with the partition plate 40 by welding.

When the first filter element 50 is set in the inner barrel 30, the lower end surface of the first filter element 50 is in sealing contact with the first mounting surface 40a on the partition plate 40. Since the diameter of the first filter element 50 is smaller than the diameter of the inner barrel 30, the first filter element There is a phenomenon that the filter element 50 moves out of position along the first installation surface 40a, thereby affecting the sealing performance between the first filter element 50 and the first installation surface 40a. In order to avoid the above problems, in this embodiment, the position of the first filter element 50 on the first installation surface 40 a needs to be limited to prevent the movement of the first filter element 50 , wherein the first installation surface 40 a corresponds to the first filter element 50 A first annular flange 420 is provided, and the inner surface of the first annular flange 420 is in contact with the outer peripheral surface of the first filter element 50, so that the first filter element 50 is restricted by the first annular flange 420, and thus will not Offset and dislocation occur, thereby ensuring the tightness between the first filter element 50 and the separation disc 40 . It should be noted that, in this embodiment, in order to ensure the tightness between the first filter element 50 and the separation disc 40, the end face of the lower end of the first filter element 50 is preferably fitted with the first installation surface 40a, and the surface passes through the surface. The fit method enhances the sealing effect. When the first filter element 50 is inserted into the first limiting groove 420a, the inner peripheral surface of the first annular flange 420 also preferably fits with the outer peripheral surface of the first filter element 50 to further enhance the sealing effect. Of course, in this embodiment, a sealant or a sealant coating may be provided between the first filter element 50 and the first installation surface 40a to further reduce the assembly gap, so as to achieve a better sealing effect.

Further, the above-mentioned first annular sealing groove 410 can be provided on the upper end surface of the first annular flange 420, so that the depth of the first annular sealing groove 410 can be increased on the premise of increasing the thickness of the partition disc 40, so that the The sealing effect between the inner tub 30 and the separating disc 40 is better. Meanwhile, there is a gap between the outer peripheral surface of the first filter element 50 and the inner wall of the inner tub 30 , so as to facilitate the formation of a water path in the first filter cavity 100 .

It should be pointed out that, in this embodiment, the first water inlet 110 and the second water inlet 130 corresponding to the first filter cavity 100 are arranged on the filter element joint 10 located at the upper end of the outer tub 20 . The inner barrel joint 301 communicates with the filter element joint 10 . At this time, an upper end cover 310 is also provided between the first filter element 50 and the upper end of the inner barrel 30 , and the upper end of the first filter element 50 is also in sealing contact with the upper end cover 310 . In the inner tub 30 , the two ends of the first filter element 50 are sealed with the upper end cover 310 and the partition plate 40 respectively, so that the inside and outside of the first filter element 50 are isolated from each other, forming the first water inlet chamber 101 and the second water outlet chamber 202 . The upper cover 310 is also provided with an upper cover joint 311, the upper cover joint 311 is also communicated with the filter element joint 10, and the upper cover joint 311 is arranged in the inner barrel joint 301 at intervals. The inner side also has a water passage. The first water inlet 110 is communicated with the upper cover joint 311, and then guides the water into the first water inlet cavity 101 outside the first filter element 50, and the upper cover joint 311 is communicated with the first water outlet 120, and then the first water inlet 120 is connected. The water flow of the first water outlet cavity 102 inside a filter element 50 is directed to the first water outlet 120 to realize the filtering and purification of the water quality by the first filter cavity 100 .

In the second filter cavity 200, since the second filter element 60 is disposed below the partition plate 40, and the upper end of the second filter element 60 is in sealing contact with the second installation surface 40b, in order to prevent the second filter element 60 from sliding along the second installation surface 40b Offset and dislocation occurs, which affects the sealing effect between the second filter element 60 and the separation disc 40. In this embodiment, the position of the second filter element 60 on the second installation surface 40b needs to be limited to prevent the second filter element 60 from being sealed. The second installation surface 40 b is provided with a second annular flange 430 corresponding to the second filter element 60 , and the inner side surface of the second annular flange 430 is in contact with the outer peripheral surface of the second filter element 60 . Since the second filter element 60 is restricted by the second annular flange 430 , the offset and dislocation will not occur, thereby ensuring the sealing between the second filter element 60 and the separating disc 40 . It should be noted that, in this embodiment, in order to ensure the sealing between the second filter element 60 and the partition disc 40, the end face of the upper end of the second filter element 60 is preferably fitted with the second installation surface 40b, and the surface The fit method enhances the sealing effect. The inner peripheral surface of the second annular flange 430 is also preferably abutted with the outer peripheral surface of the second filter element 60 to further enhance the sealing effect. Of course, in this embodiment, a sealant or a sealant coating may be arranged between the second filter element 60 and the second installation surface 40b to further reduce the assembly gap, so as to achieve a better sealing effect.

In this embodiment, the second water inlet 130 and the second water outlet 140 are also preferably arranged on the filter element joint 10. At this time, the first water inlet 110, the first water outlet 120, the second water inlet 130 and the second outlet The water ports 140 are all arranged at the filter element joint 10, that is, the four are arranged at one end of the composite filter element 1. In this way, it is convenient to connect the water channels of the composite filter element 1, shorten the distance of the connection water channels, and avoid the intricate arrangement of the connection water channels. Great inconvenience caused by the water purification equipment.

In order to achieve the above purpose, in this embodiment, the second filter cavity 200 needs to be communicated with the second water inlet 130 and the second water outlet 140 of the filter element joint 10 . In the second filter cavity 200 , the outside of the second filter element 60 forms a second water inlet cavity 201 , the inside of the second filter cavity 200 forms a second water outlet cavity 202 , and the gap between the outer tub 20 and the inner tub 30 forms a second water inlet chamber 202 . In the water inlet channel 203 of the water cavity 201, the second water inlet 130 of the filter element joint 10 is communicated with the water inlet channel 203, and the partition plate 40 is provided with an overflow port 440a at the position corresponding to the water inlet channel 203 to guide the water flow to the second water inlet channel 203. In the water inlet chamber 201 , the water flows from the outside of the second filter chamber 200 into the inside of the second filter chamber 200 for filtration and purification, and finally guides the water in the second water outlet chamber 202 to the second water outlet 140 through the water conduit.

It should be noted that, in the second filter cavity 200, in order to make the water flow all pass through the second filter element 60 to realize filtration and purification, and prevent the water flow from flowing from the lower end of the second filter element 60 to the second water outlet cavity 202, in this embodiment, the second filter element The lower end of 60 is also in sealing abutment with the bottom wall of outer tub 20 . As a preferred embodiment, a lower end cover 210 is provided between the lower end of the second filter element 60 and the bottom wall of the outer tub 20, and the two ends of the second filter element 60 are sealed and fit with the second installation surface 40b and the lower end cover 210 respectively, so that , the lower end of the second filter element 60 is prevented from being directly attached to the bottom of the outer tub 20 , which reduces the precision requirement of the bottom wall of the outer tub 20 , and helps to reduce the manufacturing difficulty of the outer tub 20 and the production cost.

It can be understood that, in the above-mentioned embodiment, the separation disc 40 is provided with an overflow port to realize the communication between the second water inlet 130 and the second water inlet cavity 201 . There are many ways to form the flow opening, for example, a through hole is formed directly on the partition plate 40 , or a support protrusion 440 is provided. 4 to 7 , a plurality of support protrusions 440 are provided on the outer peripheral surface of the partition plate 40, the support protrusions 440 are in contact with the inner wall of the outer tub 20, and an overflow port is formed between the adjacent support protrusions 440, so that , the overflow port connects the filter chambers on both sides of the partition plate 40 , that is, the water inlet channel 203 and the second water inlet chamber 201 are connected. It should be noted that the support protrusion 440 also has the function of fixing the partition plate 40 to the inner wall of the outer tub 20 , and the end of the support protrusion 440 away from the partition plate 40 abuts against the inner wall of the outer tub 20 , thereby holding the partition plate 40 It is fixed in the outer tub 20 . In order to fix the partition plate 40 and the outer tub 20 more firmly, the support protrusions 440 are evenly arranged along the circumferential direction of the partition plate 40, so that the force on the partition plate 40 is more uniform, so that the partition plate 40 can be better The inner tub 30 is supported.

Since the water out of the second filter element 60 needs to pass through the water conduit to flow to the second water outlet 140, in order to make the overall structure of the composite filter element 1 more compact, the water conduit is preferably inserted in the inner tub 30 in the vertical direction. , the water conduit is the central pipe 70, and the central pipe 70 is also sealed and penetrated with the partition plate 40 in the up and down direction to communicate with the inner space of the second filter element 60 and the filter element joint 10, so as to realize the connection between the second water outlet cavity 202 and the second water outlet cavity 202. The water outlet 140 is turned on, and the filtered and purified water is led out of the second filter cavity 200 . Referring to FIG. 4 , in the present embodiment, a through hole 460 is formed on the partition plate 40 corresponding to the central tube 70 , and a third annular flange 450 is formed around the through hole 460 on the first mounting surface 40 a and/or the second mounting surface 40 b , a second annular sealing groove 450a is formed between the third annular flange and the pipe wall of the central pipe 70, and a sealing ring 80 is provided between the inner wall of the first filter element 50 and the pipe wall of the central pipe 70. The sealing contact with the central pipe 70 and the groove wall of the second annular sealing groove 450a can further realize the radial and axial sealing of the central pipe 70 .

1 and 4, in order to prevent the inner sealing ring 80 of the second annular sealing groove 450a from moving away from the second annular sealing groove 450a along the axial direction of the central tube 70, the notch of the second annular sealing groove 450a is provided with a sealing cover 90 The sealing cover 90 is provided with an avoidance hole 91 corresponding to the central tube 70, and the sealing cover 90 covers the notch of the second annular sealing groove 450a to ensure the reliable operation of the sealing ring 80 and the sealing effect.

The present invention also proposes a water purification device, the water purification device includes a composite filter element, and the specific structure of the composite filter element refers to the above-mentioned embodiment. All the beneficial effects brought by the technical solutions of the examples are not repeated here.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. The utility model provides a composite filter element for water purification unit, its characterized in that includes:

a filter element joint;

the upper end of the outer barrel is communicated with the filter element joint;

the inner barrel is arranged in the outer barrel, the upper end of the inner barrel is communicated with the filter element joint, the bottom end of the inner barrel is arranged in an open manner, a gap is reserved between the bottom wall surface of the outer barrel and the bottom wall surface of the inner barrel, and a gap is reserved between the outer wall surface of the inner barrel and the inner wall surface of the outer barrel to form a water inlet channel;

the separating disc is arranged in the outer barrel and provided with a first mounting surface and a second mounting surface which are oppositely arranged, the bottom end of the inner barrel is hermetically connected with the first mounting surface, so that a first filtering cavity and a second filtering cavity which are mutually independent are formed in the outer barrel, the first filtering cavity is arranged in the inner barrel, the second filtering cavity is arranged outside the inner barrel, and the water inlet channel forms a part of the second filtering cavity;

the first filter element is cylindrical and is positioned in the inner barrel, the lower end of the first filter element is in sealed butt joint with the first mounting surface, a first water inlet cavity is formed in the first filter cavity and corresponds to the outer side of the first filter element, and a first water outlet cavity is formed in the first filter cavity and corresponds to the inner side of the first filter element; and the number of the first and second groups,

and the second filter element is arranged in the second filter cavity and is positioned below the separation disc.

2. The composite filter element of claim 1, wherein an upper end cap is further disposed between the first filter element and the upper end of the inner barrel, and the upper end of the first filter element is sealed with the upper end cap to isolate the inside and the outside of the first filter element from each other, thereby forming the first water inlet chamber and the first water outlet chamber.

3. The composite filter element of claim 2, wherein the upper side surface of the upper end cover and the inner side surface of the top end of the inner barrel are provided with water passing channels, and the water passing channels are communicated with the first water inlet cavity.

4. The composite filter element of claim 2, further comprising a center tube sealingly disposed through the separation disc in an up-down direction to communicate the interior space of the second filter element with the filter element adapter.

5. The composite filter element of claim 4, wherein the first outlet chamber is defined by a gap between the inside of the first filter element and the outside of the center tube.

6. The composite filter element of claim 5, wherein said upper end cap further comprises an upper cap fitting, said upper cap fitting communicating said first outlet chamber with said filter element fitting.

7. The composite filter element of claim 1, wherein the inner barrel is removably connected or welded to the separator disc; and/or the filter element joint is detachably connected with the outer barrel.

8. The composite filter element according to any one of claims 1 to 7, wherein the first mounting surface is provided with a first annular sealing groove corresponding to the bottom end of the inner barrel, and the bottom end of the inner barrel is inserted and sealed in the first annular sealing groove.

9. The composite filter element of claim 1, wherein the first mounting surface has a first annular flange corresponding to the first filter element, an inner side surface of the first annular flange abutting an outer peripheral surface of the first filter element.

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

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