CN212559719U

CN212559719U - Composite filter element structure and water purifier

Info

Publication number: CN212559719U
Application number: CN202022164431.5U
Authority: CN
Inventors: 盛先贺; 陈伟杰; 郑礼政; 陶学发; 向海涛; 贺雷
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-02-19
Anticipated expiration: 2030-09-27

Abstract

The utility model provides a composite filter element structure and a water purifier, which comprises an outer shell, wherein a containing cavity is arranged in the outer shell, the outer shell comprises a first opening end, and the first opening end is communicated with the containing cavity; the inner shell is arranged in the accommodating cavity, a first accommodating space is formed between the inner shell and the outer shell, a first filter element assembly is arranged in the first accommodating space and is suitable for separating the first accommodating space, a second opening end on the inner shell is arranged on the inner side of the first opening end, a first water inlet and a first water outlet are formed along two sides of the first filter element assembly respectively, and a first switch structure is arranged between the first opening end and the second opening end; the inner tube is arranged in the inner shell, a cavity is arranged in the inner shell, a second filter element assembly is arranged on the cavity, and a second containing space is arranged between the inner tube and the inner shell.

Description

Composite filter element structure and water purifier

Technical Field

The utility model relates to a filter water purification technical field, concretely relates to combined filter core structure and purifier.

Background

Along with the improvement of living standard, people pay more and more attention to the safety of water quality, and the water quality provided by water works can not meet the living demands of people. More and more people choose to install water purifiers at home in order to drink filtered water with less impurities.

In the prior art, a water purifier is usually provided with 3 or more filter elements with different filtering functions, such as RO filter elements, carbon elements, PAC filter elements, and the like, wherein the RO filter elements are reverse osmosis filter elements and can filter inorganic salts, organic matters, heavy metal ions and other harmful substances in water; PAC filter core is leading the filtration, can filter large granule objects such as aquatic silt, and the peculiar smell in the aquatic can effectively be filtered to the carbon core, promotes the taste. Through the setting of different filter cores and through the water route UNICOM, realize the effective filtration at water source.

However, the arrangement of the plurality of filter elements not only occupies a large space in the water purifier, but also has a plurality of connecting pipelines, thereby improving the damage risk, easily causing the problems of water leakage and the like, and increasing the difficulty for installation and maintenance.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art setting occupation space of many filter cores in the water purifier big, and the damage risk is high, has added the maintenance degree of difficulty to a composite filter element structure and purifier are provided.

The utility model provides a composite filter element structure, include:

the shell is internally provided with an accommodating cavity and comprises a first opening end, and the first opening end is communicated with the accommodating cavity;

the inner shell is arranged in the accommodating cavity, a first accommodating space is formed between the inner shell and the outer shell, a first filter element assembly is arranged in the first accommodating space and is suitable for separating the first accommodating space, a second opening end on the inner shell is arranged on the inner side of the first opening end, a first water inlet and a first water outlet are formed along two sides of the first filter element assembly respectively, and a first switch structure is arranged between the first opening end and the second opening end and is suitable for controlling the opening and closing of the first water inlet and the first water outlet;

the inner tube sets up inside the interior casing, inside is provided with the cavity, is provided with second filter element group spare on it, the inner tube with be provided with the second accommodation space between the interior casing, third opening end sets up on the inner tube the second open end is inboard, and with the shaping has the second water inlet between the second opening end to be provided with second switch structure, be suitable for the switching of control second water inlet, the second water inlet with second accommodation space intercommunication sets up, the cavity with third opening end intercommunication sets up, be provided with second delivery port and third switch structure on the third opening end, the third switch structure of telling is suitable for the switching of control second delivery port.

The first filter element assembly comprises: the first filter element piece is arranged around the inner shell at an interval with the inner shell and the outer shell, is suitable for filtering liquid from the first water inlet and guides the liquid to the first water outlet;

the first end cover comprises a first front end cover and a first rear end cover, the first front end cover and the first rear end cover are respectively arranged at two ends of the first filter element and are in sealing connection with the first filter element, and the first front end cover is adjacent to the first opening end.

And a limiting shaft shoulder is arranged on the peripheral side surface of the inner shell and is fixed with the first rear end cover in a sealing way.

A plurality of first protruding parts are arranged along the peripheral side of the inner shell.

First filter element is provided with the inner edge skeleton, be provided with the orientation on the inner edge skeleton the outstanding second bulge in interior casing one side, the second bulge with the crisscross interval setting of first bulge.

The inner shell is integrally formed.

The inner tube includes: the central tube comprises a third opening end, is arranged at intervals with the inner shell and forms the second accommodating space;

the second filter element assembly is suitable for being arranged along the axial extension of the central tube, one end of the second filter element assembly is connected with the central tube, the other end of the second filter element assembly is fixedly connected with the inner wall of the inner shell, which faces away from the open end, and the second filter element assembly is suitable for filtering liquid in the second containing space and conveying the liquid to the cavity.

The second filter element assembly comprises:

the second filter element is arranged between the cavity and the second accommodating space, is spaced from the inner shell, is suitable for filtering liquid from the second accommodating space and guides the liquid to a second water outlet;

the second end cover comprises a second front end cover and a second rear end cover, the second front end cover and the second rear end cover are respectively arranged at two ends of the second filter element and are in sealing connection with the second filter element, the second front end cover is abutted to the central pipe, and the second rear end cover is back to the outer shell and is fixedly connected with the inner wall of one side of the open end.

The outer sides of the first end cover and the second end cover are circumferentially provided with a plurality of radial protrusions, and the protrusions are abutted to the inner wall of the outer shell.

The first switch structure is arranged in a tubular shape, the inner diameter of the first switch structure is arranged in a step shape, an elastic part is arranged in the first switch structure, the first switch structure is in sealing connection with the first filter element assembly, and the first switch structure moves back to the direction of the first opening end under the action of external force and opens the water passing state of the first water inlet and abuts against the inner wall of the first opening end and closes the water stopping state of the first water inlet.

The second switch structure is arranged on the inner side of the first switch structure in a tubular sleeved mode, is internally provided with an elastic part, is connected to the outer side of the third opening end in a sealing mode, moves back to the direction of the first opening end under the action of external force, opens the water passing state of the first water outlet and the second water inlet, abuts against the inner wall of the first switch structure and the outer wall of the inner pipe respectively, and closes the water stopping state of the first water outlet and the second water inlet.

The third switch structure comprises a valve core, a gland is sleeved at the outer end of the valve core and fixed at the outer end of the second water outlet and suitable for limiting the valve core, and an elastic piece is sleeved at the other end of the valve core and extends into the second water outlet to abut against a shaft shoulder structure arranged in the second water outlet.

The first filter element piece is the PAC filter core, the second filter element piece is the carbon-point filter core.

The outer shell, the inner shell and the inner tube are coaxially arranged.

The shell body includes filter flask body and filter flask lid, the one end of filter flask body is provided with first open end, the filter flask lid is fixed to be set up filter flask body dorsad the other end of first open end, the connection is provided with the filter core handle on the filter flask lid.

The filter flask body and the filter flask lid, and the gland with the outer end of second delivery port passes through supersound fixed connection.

The utility model also provides a purifier, including foretell composite filter element structure.

The water purifier further comprises a water circuit board, the water circuit board is matched with the composite filter element structure, and a water circuit adapter which is suitable for being connected with the first switch structure, the second switch structure and the third switch structure in a butting and isolating mode is arranged on the water circuit board, wherein the first water inlet, the first water outlet and the second water inlet are connected through the water circuit adapter.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a composite filter element structure, include: the shell is internally provided with an accommodating cavity and comprises a first opening end, and the first opening end is communicated with the accommodating cavity; the inner shell is arranged in the accommodating cavity, a first accommodating space is formed between the inner shell and the outer shell, a first filter element assembly is arranged in the first accommodating space and is suitable for separating the first accommodating space, a second opening end on the inner shell is arranged on the inner side of the first opening end, a first water inlet and a first water outlet are formed along two sides of the first filter element assembly respectively, and a first switch structure is arranged between the first opening end and the second opening end and is suitable for controlling the opening and closing of the first water inlet and the first water outlet; the inner tube sets up inside the interior casing, inside is provided with the cavity, is provided with second filter element group spare on it, the inner tube with be provided with the second accommodation space between the interior casing, third opening end sets up on the inner tube the second open end is inboard, and with the shaping has the second water inlet between the second opening end to be provided with second switch structure, be suitable for the switching of control second water inlet, the second water inlet with second accommodation space intercommunication sets up, the cavity with third opening end intercommunication sets up, be provided with second delivery port and third switch structure on the third opening end, the third switch structure of telling is suitable for the switching of control second delivery port.

Composite filter element structure sets up the shell body, interior casing and inner tube three layer construction, through setting up first filter element group spare between shell body and interior casing, separate first accommodation space, and be provided with first water inlet and first delivery port, make external water source can filter from first water inlet to first filter element group spare, flow from first delivery port again, first complete filtration water route has been formed, and simultaneously, interior casing and interior intervascular are provided with the second accommodation space, and be connected with the second water inlet, and be provided with second filter element group spare on the inner tube, inside is provided with the cavity of connecting the second delivery port, so can make external water source get into the second accommodation space from the second water inlet like this, and pass second filter element group spare, flow from the second delivery port, form the complete filtration water route of second.

Set up two sets of filter element group spares in a composite filter element structure, and form two and filter the water route, can realize the filtration of two different functions in a filter core, but realize the setting that integrates of many filter cores, set up like this, the connection of pipeline has been reduced, the appearance of pipeline water leakage scheduling problem has been reduced to appear, secondly, it is all just as right with the maintenance only need install or change a filter core to install, do not need to dismantle again after a plurality of filter cores again, the maintenance personal's of being convenient for installation and maintenance, the volume of filter core has been reduced simultaneously, be convenient for the transport of filter core and the use of purifier.

2. The utility model provides a composite filter element structure is provided with spacing shaft shoulder on the week side of interior casing, spacing shaft shoulder with first rearmounted end cover is sealed fixed.

Set up spacing shaft shoulder on the one hand, can realize spacing or fixed to first filter element group spare through the cooperation of the first open end medial surface of shell body and the spacing shaft shoulder of interior casing, set up like this simultaneously, the composite filter element structure of being convenient for is in the assembling process, can install first filter element group spare earlier in the shell body after, the interior casing of reassembling, the going on smoothly of the assembling process of being convenient for, on the other hand, spacing shaft shoulder is sealed fixed with first rearmounted end cover, and simultaneously, the first open end medial surface and the first leading end cover butt of shell body, it effectively realizes the isolation between first seal assembly both sides branch road water course to set up like this, avoid the appearance of the cross water phenomenon between the branch road water course.

3. The utility model provides a composite filter element structure follows the week side of interior casing is provided with a plurality of first bulges.

Because interior casing both sides have the cavity that holds different rivers respectively, need bear the structural deformation that the pressure difference brought, through set up first protruding portion on the casing including, effectively strengthen the intensity of interior casing, increased the resistance to deformation, improved interior casing job stabilization nature, increase the life of filter core, avoid appearing the cross water between the branch road water course.

4. The utility model provides a composite filter element structure, first filter element are provided with the inner edge skeleton, be provided with the orientation on the inner edge skeleton the outstanding second bulge in interior casing one side, the second bulge with the crisscross interval of first bulge sets up.

Second bulge and the crisscross setting of first bulge on the inner edge skeleton, the structural strength of the first filter element piece of increase and interior casing simultaneously on the one hand, avoid taking place deformation because of the pressure differential, the stability of interior casing and the work of first filter element piece has been improved simultaneously, increase the life of filter core, on the other hand, crisscross second bulge and the first bulge that sets up are when guaranteeing that the rivers in the holding water space can freely flow, prevent the rivers through-flow and go into, reduce the impact force of rivers, avoid the local water side of meeting of filter core part to bear excessive water pressure, crisscross horizontal muscle that sets up is favorable to leading rivers to not equidirectional, divide water pressure to more stress structure, improve the bearing capacity of filter core.

5. The utility model provides a composite filter element structure, first end cover with the outside of second end cover is equipped with a plurality of radial archs along circumference, protruding with the inner wall butt of shell body.

Set up like this and can realize effectively supporting first accommodation space and second accommodation space on the one hand, guarantee first filter element group spare respectively with interior casing and shell body interval to and second filter element group spare and the stability of interior casing interval, on the other hand, the clearance between adjacent arch can make the water route in first accommodation space and the second accommodation space unobstructed, guarantees that rivers can take place to flow according to predetermineeing the direction.

6. The utility model provides a composite filter element structure, the filter flask body with the filter flask lid, and the gland with the outer end of second delivery port passes through supersound fixed connection.

Because the filter core is as the processing of handling human drinking water source, the material is mostly the plastic part, can realize through vibration and pressure that the material softens and the welding through the ultrasonic wave, and simultaneously, the supersound is fixed to have the time spent less, and is energy-conserving high-efficient, and degree of automation is high, a series of advantages such as sealed water-proof effects is good, and than gluing stably, is difficult to the overflow phenomenon of gluing to appear.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an internal structure of a composite filter element structure provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of section A of the composite filter element arrangement of FIG. 1;

FIG. 3 is a schematic view of an enlarged view of section A of the composite filter element arrangement of FIG. 2;

FIG. 4 is a schematic view of an outer housing construction of the composite filter element construction of FIG. 1;

FIG. 5 is a schematic view of the internal water flow path of the composite filter element arrangement of FIG. 1;

FIG. 6 is a schematic view of an internal water path flow of the local configuration of the composite filter element arrangement of FIG. 1;

FIG. 7 is a schematic view of an internal water flow path of another local configuration of the composite filter element arrangement of FIG. 1;

fig. 8 is an exploded view of the outer housing structure of the composite filter element structure of fig. 4;

FIG. 9 is a schematic view of a first cartridge assembly of the composite cartridge arrangement of FIG. 1;

fig. 10 is an exploded view of the construction of a first filter element assembly of the composite filter element construction of fig. 9;

fig. 11 is an exploded view of the construction of the center tube and third switch arrangement of the composite filter element arrangement shown in fig. 1;

FIG. 12 is a schematic diagram of a second cartridge assembly of the composite cartridge arrangement of FIG. 1;

fig. 13 is an exploded view of the construction of a second filter element assembly of the composite filter element construction of fig. 12;

FIG. 14 is a schematic partial schematic view of a second and third switch arrangement of the composite filter element arrangement of FIG. 1;

description of reference numerals:

1-an outer shell; 2-an inner housing; 3-inner tube; 4-a first accommodation space; 5-a first filter element assembly; 6-a second accommodation space; 7-a cavity; 8-a first switch structure; 9-a second switch structure; 10-a third switch structure; 12-a first open end; 13-a first water inlet; 14-a first water outlet; 15-filter flask body; 16-filter bottle cap; 17-a cartridge handle; 21-a second open end; 22-a second water inlet; 23-a limiting shaft shoulder; 24-a first projection; 31-a third open end; 32-a second water outlet; 33-a central tube; 34-a second filter element assembly; 341-a second filter element; 342-a second front end cap; 343-a second rear end cap; 51-a first filter element; 511-inner edge skeleton; 512-a second projection; 52-first front end cap; 53-first rear end cap; 101-a valve core; 102-gland.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-14, a composite filter element arrangement, comprises: an outer shell 1, an inner shell 2 and an inner tube 3.

An accommodating cavity is arranged in the outer shell 1, the outer shell 1 comprises a first opening end 12, and the first opening end 12 is communicated with the accommodating cavity;

interior casing 2 sets up and is holding intracavity portion, and the shell body 1 within a definite time be provided with first accommodation space 4, be provided with first filter element group 5 in the first accommodation space 4, can separate first accommodation space 4, second open end 21 sets up at first open end 12 inboardly on interior casing 2, and it has first water inlet 13 and first delivery port 14 to follow the shaping respectively of first filter element group 5 both sides, be provided with first switch structure 8 between first open end 12 and second open end 21, can control the switching of first water inlet 13 and first delivery port 14.

The inner tube 3, set up inside the inner casing 2, inside is provided with cavity 7, be provided with second filter element group 34 on it, be provided with second accommodation space 6 between inner tube 3 and inner casing 2, third open end 31 sets up in second open end 21 inboard on the inner tube 3, and with the shaping of second open end 21 within a definite time have second water inlet 22, and be provided with second switch structure 9, can control the switching of second water inlet 22, second water inlet 22 sets up with second accommodation space 6 intercommunication, cavity 7 sets up with third open end 31 intercommunication, be provided with second delivery port 32 and third switch structure 10 on the third open end 31, the switching of second delivery port 32 can be controlled to third switch structure 10 of telling.

As shown in fig. 1 to 6, the composite filter element structure has a three-layer structure of an outer housing 1, an inner housing 2 and an inner tube 3, a first filter element assembly 5 is disposed between the outer housing 1 and the inner housing 2 to separate a first receiving space 4 and a first water inlet 13 and a first water outlet 14, so that an external water source can be filtered from the first water inlet 13 to the first filter element assembly 5 and then flow out from the first water outlet 14, thereby forming a first complete filtering water path, meanwhile, a second receiving space 6 is disposed between the inner housing 2 and the inner tube 3 and connected with a second water inlet 22, a second filter element assembly 34 is disposed on the inner tube 3 and internally provided with a cavity 7 connected with a second water outlet 32, so that the external water source can enter the second receiving space 6 from the second water inlet 22, pass through the second filter element assembly 34, and flow out from the second water outlet 32, forming a second complete filtration waterway.

Set up spacing shoulder 23 on the one hand, can realize spacing or fixed to first filter element group spare 5 through 12 medial surfaces of first open end of shell body 1 and the spacing shoulder 23 cooperation of interior casing 2, set up like this simultaneously, be convenient for compound filter core structure is in the assembling process, can install first filter element group spare 5 back in shell body 1 earlier, interior casing 2 of reassembling, be convenient for go on smoothly of assembling process, on the other hand, spacing shoulder 23 is sealed fixed with first rearmounted end cover 53, and simultaneously, 12 medial surfaces of first open end of shell body 1 and first leading end cover 52 butt, set up like this and effectively realized the isolation between first seal assembly both sides branch road water course, avoid the appearance of the cross water phenomenon between the branch road water course.

The first filter element assembly 5 includes a first filter element 51 and a first end cap.

A first filter element 51 surrounding the inner housing 2 and spaced from the inner housing 2 and the outer housing 1, for filtering the liquid from the first water inlet 13 and guiding the liquid to the first water outlet 14; the first end cap, which includes a first front end cap 52 and a first rear end cap 53, is provided at both ends of the first filter element 51 and is sealingly connected to the first filter element 51, and the first front end cap 52 is provided adjacent to the first open end 12.

A limiting shaft shoulder 23 is arranged on the peripheral side surface of the inner shell 2, and the limiting shaft shoulder 23 is fixed with the first rear end cover 53 in a sealing way. Set up spacing shoulder 23 on the one hand, can realize spacing or fixed to first filter element group spare 5 through 12 medial surfaces of first open end of shell body 1 and the spacing shoulder 23 cooperation of interior casing 2, set up like this simultaneously, be convenient for compound filter core structure is in the assembling process, can install first filter element group spare 5 back in shell body 1 earlier, interior casing 2 of reassembling, be convenient for go on smoothly of assembling process, on the other hand, spacing shoulder 23 is sealed fixed with first rearmounted end cover 53, and simultaneously, 12 medial surfaces of first open end of shell body 1 and first leading end cover 52 butt, set up like this and effectively realized the isolation between first seal assembly both sides branch road water course, avoid the appearance of the cross water phenomenon between the branch road water course.

A plurality of first projecting portions 24 are provided along the peripheral side of the inner case 2. Because 2 both sides in interior casing have the cavity that holds different rivers respectively, need bear the structural deformation that the pressure difference brought, through set up first protruding portion on interior casing 2, effectively strengthen interior casing 2's intensity, increased the resistance to deformation, improved interior casing 2 job stabilization nature, increase the life of filter core, avoid appearing the cross water between the branch road water course.

The first filter element 51 is provided with an inner frame 511, the inner frame 511 is uniformly provided with a plurality of water permeable holes and second protrusions 512 protruding toward one side of the inner casing 2, and the second protrusions 512 and the first protrusions 24 are alternately arranged. Second bulge 512 and the crisscross setting of first bulge 24 on inner edge skeleton 511, on the one hand increase the structural strength of first filter element 51 and interior casing 2 simultaneously, avoid taking place the deformation because of the pressure differential, the stability of interior casing 2 and the work of first filter element 51 has been improved simultaneously, increase the life of filter core, on the other hand, crisscross second bulge 512 and the first bulge 24 of setting are guaranteeing to hold rivers in the water space can freely flow in, prevent the rivers through-flow and go into, reduce the impact force of rivers, avoid the partial face of meeting water side of filter core part to bear excessive water pressure, crisscross horizontal muscle that sets up is favorable to leading rivers to different directions, divide water pressure to more stress structure, improve the bearing capacity of filter core.

The inner housing 2 is integrally formed. The integrated setting like this has effectively reduced the use of part, has reduced the mould cost and the material cost of part, has still improved composite filter element's assembly efficiency.

The inner tube 3 includes: a center pipe 33 including a third open end 31, and spaced apart from the inner case 2 and constituting the second receiving space 6; second filter element group 34 can follow center tube 33 axial extension setting, and one end is connected with center tube 33, and the other end and one side inner wall fixed connection of interior casing 2 back to the open end, and second filter element group 34 can filter the liquid in second accommodation space 6 to carry to cavity 7.

The second filter element assembly 34 includes: the second filter element 341, which is disposed between the cavity 7 and the second receiving space 6 and spaced apart from the inner housing 2, can filter the liquid from the second receiving space 6 and guide the liquid to the second water outlet 32. The second end cap, including the second front end cap 342 and the second rear end cap 3433, is disposed at both ends of the second filter element 341 and is connected to the second filter element 341 in a sealing manner, the second front end cap 342 abuts against the center tube 33, and the second rear end cap 3433 is fixedly connected to the inner wall of the outer housing on the side opposite to the open end.

The outside of first end cover and second end cover is equipped with a plurality of radial archs along circumference, and the arch is with the inner wall butt of shell body 1. Set up like this and to realize effectively supporting first accommodation space 4 and second accommodation space 6 on the one hand, guarantee first filter element group spare 5 respectively with

interior casing

2 and 1 interval of shell body to and second filter element group spare 34 and the stability of interior casing 2 interval, on the other hand, the clearance between adjacent arch can make the water route in first accommodation space 4 and the second accommodation space 6 unobstructed, guarantees that rivers can take place to flow according to the direction of predetermineeing.

First switch structure 8 is the tubulose setting, and its internal diameter is the echelonment setting, embeds the elastic component, with first filter element group spare 5 sealing connection, has under the exogenic action and moves in the 12 directions of first open end dorsad to open the logical water state of first water inlet 13, and with the inner wall butt of first open end 12, and close the stagnant water state of first water inlet 13.

The second switch structure 9 is a tubular sleeve arranged inside the first switch structure 8, is internally provided with an elastic part, is connected outside the third opening end 31 in a sealing way, moves back to the direction of the first opening end 12 under the action of external force, opens the water passing state of the first water outlet 14 and the second water inlet 22, abuts against the inner wall of the first switch structure 8 and the outer wall of the inner pipe 3 respectively, and closes the water stopping state of the first water outlet 14 and the second water inlet 22.

The third switch structure 10 includes a valve core 101, a gland 102 is sleeved on an outer end of the valve core 101, the gland 102 is fixed on an outer end of the second water outlet 32, the valve core 101 can be limited, and an elastic member is sleeved on the other end of the valve core 101, extends into the second water outlet 32, and abuts against a shaft shoulder structure arranged in the second water outlet 32.

In the present embodiment, the first filter element 51 is a PAC filter element, and the second filter element 341 is a carbon rod filter element. As an alternative embodiment, the first filter element 51 is a carbon rod filter element, and the second filter element 341 is a PAC filter element; alternatively, one of the first and

second filter elements

51, 341 may be an RO filter element.

In the present embodiment, the outer housing 1, the inner housing 2 and the inner tube 3 are coaxially arranged. As an alternative embodiment, the outer housing 1, the inner housing 2 and the inner tube 3 may be arranged non-coaxially. In this embodiment, the elastic member is a spring.

The outer casing 1 includes filter flask body 15 and filter flask lid 16, and the one end of filter flask body 15 is provided with first open end 12, and filter flask lid 16 is fixed to be set up at the other end of filter flask body 15 dorsad first open end 12, and the last connection of filter flask lid 16 is provided with filter core handle 17.

The filter flask body 15 and the filter flask cover 16, and the pressing cover 102 and the outer end of the second water outlet 32 are fixedly connected by ultrasound. Because the filter core is as the processing of handling human drinking water source, the material is mostly the plastic part, can realize through vibration and pressure that the material softens and the welding through the ultrasonic wave, and simultaneously, the supersound is fixed to have the time spent less, and is energy-conserving high-efficient, and degree of automation is high, a series of advantages such as sealed water-proof effects is good, and than gluing stably, is difficult to the overflow phenomenon of gluing to appear.

The embodiment also provides a water purifier, which comprises the composite filter element structure. The water purifier also comprises a water circuit board, the water circuit board is matched with the composite filter element structure, and a water circuit conversion joint which is suitable for being abutted against the first switch structure 8, the second switch structure 9 and the third switch structure 10 and isolating the first water inlet 13, the first water outlet 14 and the second water inlet 22 is arranged on the water circuit board.

The working process is as follows:

in installing the filter core pipe on the purifier with compound filter core structure, the one side that has first open end 12 and the water route crossover sub butt on the water route board extrude the elastic component on each switch structure for filter core on first switch structure 8 and second switch structure 9 and the third switch structure 10 is along the one side motion of first open end 12 of dorsad simultaneously, makes first water inlet 13 and first delivery port 14 and second water inlet 22 and second delivery port 32 become logical water state by the stagnant water state.

As shown in fig. 4-6, the external water flows into the water path between the first filter element assembly 5 and the outer housing 1 from the first water inlet 13, and the first filter element assembly 5 enters the water path between the outer housing 1 and the inner housing 2 in the direction away from the first open end 12, and is filtered by the first filter element 51, and then enters the water path between the first filter element assembly 5 and the inner housing 2, and is discharged through the first water outlet 14 between the first switch structure 8 and the second switch structure 9, so as to complete the first re-filtering, and the first filter element 51 is a PAC filter element, and is used as a pre-filter, and can filter large particles such as silt in water.

The water after the first secondary filtration is filtered by the RO filter element in the water purifier to finish the second secondary filtration, and the RO filter element can filter inorganic salt, organic matters, heavy metal ions, bacteria, pesticides, trichloromethane waste and other harmful substances in the water as the reverse osmosis filter element.

The water after the second secondary filtration enters the composite filter element structure again from the second water inlet 22 between the second switch structure 9 and the central tube 33, flows to the space between the second filter element assembly 34 and the inner shell 2 along the water path between the inner shell 2 and the central tube 33, enters the cavity in the inner tube 3 through the filtration of the second filter element 341, and is discharged through the second water outlet 32, so that the third secondary filtration is completed, and the second filter element assembly 34 is a carbon rod filter element, so that the peculiar smell in the water can be effectively filtered, and the taste of the water is ensured.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. A composite filter element construction, comprising:

the shell body (1) is internally provided with an accommodating cavity, the shell body (1) comprises a first opening end (12), and the first opening end (12) is communicated with the accommodating cavity;

the inner shell (2) is arranged in the accommodating cavity, a first accommodating space (4) is formed between the inner shell and the outer shell (1), a first filter element assembly (5) is arranged in the first accommodating space (4) and is suitable for separating the first accommodating space (4), a second opening end (21) on the inner shell (2) is arranged on the inner side of the first opening end (12), a first water inlet (13) and a first water outlet (14) are formed along two sides of the first filter element assembly (5) respectively, and a first switch structure (8) is arranged between the first opening end (12) and the second opening end (21) and is suitable for controlling the opening and closing of the first water inlet (13) and the first water outlet (14);

an inner tube (3) arranged inside the inner shell (2) and internally provided with a cavity (7), a second filter element component (34) is arranged on the inner tube, a second containing space (6) is arranged between the inner tube (3) and the inner shell (2), the third opening end (31) on the inner pipe (3) is arranged at the inner side of the second opening end (21), a second water inlet (22) is formed between the second opening end (21), and is provided with a second switch structure (9) which is suitable for controlling the opening and closing of the second water inlet (22), the second water inlet (22) is communicated with the second accommodating space (6), the cavity (7) is communicated with the third opening end (31), a second water outlet (32) and a third switch structure (10) are arranged on the third opening end (31), and the third switch structure (10) is suitable for controlling the second water outlet (32) to be opened and closed.

2. The composite filter element arrangement according to claim 1, wherein the first filter element assembly (5) comprises:

the first filter element piece (51) is arranged around the inner shell (2) at a distance from the inner shell (2) and the outer shell (1), is suitable for filtering liquid from the first water inlet (13) and guides the liquid to the first water outlet (14);

a first end cap comprising a first front end cap (52) and a first rear end cap (53) disposed at respective ends of the first filter element (51) and sealingly connected to the first filter element (51), the first front end cap (52) being disposed adjacent the first open end (12).

3. A composite filter element arrangement according to claim 2, wherein a limiting shoulder (23) is provided on the peripheral side of the inner housing (2), the limiting shoulder (23) being sealingly fixed with the first rear end cap (53).

4. A composite filter element arrangement according to claim 3, characterised in that a number of first projections (24) are provided along the circumferential side of the inner housing (2).

5. A composite filter element construction according to claim 4, wherein the first filter element (51) is provided with an inner rim skeleton (511), and wherein the inner rim skeleton (511) is provided with second protrusions (512) protruding towards one side of the inner casing (2), and wherein the second protrusions (512) are alternately arranged with the first protrusions (24).

6. A composite filter element arrangement according to claim 5, characterised in that the inner housing (2) is provided in one piece.

7. A composite filter element arrangement according to any one of claims 2-6, wherein the inner tube (3) comprises:

a central tube (33) comprising a third open end (31) and arranged spaced from said inner housing (2) and constituting said second receiving space (6);

the second filter element assembly (34) is suitable for being arranged along the central pipe (33) in an axially extending mode, one end of the second filter element assembly is connected with the central pipe (33), the other end of the second filter element assembly is fixedly connected with the inner wall, facing away from the inner wall, of one side of the open end of the inner shell (2), and the second filter element assembly (34) is suitable for filtering liquid in the second containing space (6) and conveying the liquid to the cavity (7).

8. The composite filter element arrangement of claim 7, wherein the second filter element assembly (34) comprises:

-a second filter element (341), arranged between said cavity (7) and said second containing space (6), spaced from said inner casing (2), suitable for filtering the liquid coming from inside said second containing space (6) and channelling it towards a second outlet opening (32);

and the second end cover comprises a second front end cover (342) and a second rear end cover (343), the second front end cover (342) and the second rear end cover (343) are respectively arranged at two ends of the second filter element member (341) and are in sealing connection with the second filter element member (341), the second front end cover (342) is abutted against the central pipe (33), and the second rear end cover (343) is fixedly connected with the inner wall of one side, back to the opening end, of the outer shell (1).

9. The composite filter element structure according to claim 8, wherein a plurality of radial protrusions are arranged on the outer sides of the first end cover and the second end cover along the circumferential direction, and the protrusions are abutted with the inner wall of the outer shell (1).

10. A composite filter element arrangement according to claim 9, wherein the first switch arrangement (8) is tubular, has a stepped inner diameter, is provided with an elastic member therein, is sealingly connected to the first filter element arrangement (5), and has a water passage state in which it moves away from the first open end (12) under the action of an external force and opens the first water inlet (13), and a water stop state in which it abuts against the inner wall of the first open end (12) and closes the first water inlet (13).

11. A composite filter element structure according to claim 10, wherein the second switch structure (9) is arranged inside the first switch structure (8) in a tubular manner in a sleeving manner, is provided with an elastic element inside, is hermetically connected to the outer side of the third open end (31), and has a water passing state which moves away from the first open end (12) under the action of external force and opens the first water outlet (14) and the second water inlet (22), and a water stopping state which abuts against the inner wall of the first switch structure (8) and the outer wall of the inner tube (3) respectively and closes the first water outlet (14) and the second water inlet (22).

12. The composite filter element structure according to claim 9, wherein the third switch structure (10) comprises a valve core (101), a gland (102) is sleeved on an outer end of the valve core (101), the gland (102) is fixed on an outer end of the second water outlet (32) and is suitable for limiting the valve core (101), and an elastic member is sleeved on the other end of the valve core (101) and extends into the second water outlet (32) to abut against a shaft shoulder structure arranged in the second water outlet (32).

13. A composite filter element arrangement according to claim 10, wherein the first filter element (51) is a PAC filter element and the second filter element (341) is a carbon rod filter element.

14. A composite filter element arrangement according to claim 1, wherein the outer housing (1), the inner housing (2) and the inner tube (3) are arranged coaxially.

15. The composite filter element structure according to claim 12, wherein the outer housing (1) comprises a filter element body (15) and a filter element cover (16), wherein the first open end (12) is arranged at one end of the filter element body (15), the filter element cover (16) is fixedly arranged at the other end of the filter element body (15) opposite to the first open end (12), and a filter element handle (17) is connected and arranged on the filter element cover (16).

16. The composite filter element arrangement according to claim 15, wherein the filter flask body (15) and the filter flask cap (16), and the gland (102) and the outer end of the second water outlet (32) are fixedly connected by ultrasound.

17. A water purification machine comprising a composite filter element arrangement according to any one of claims 1 to 16.

18. The water purification machine according to claim 17, further comprising a water circuit board, wherein said water circuit board is disposed in cooperation with said composite filter element structure, and a water circuit switching joint is disposed thereon, and is adapted to abut against and isolate said first water inlet (13) and said first water outlet (14) and said second water inlet (22) with said first switch structure (8) and said second switch structure (9), and said third switch structure (10).