CN111111290A

CN111111290A - Front-rear composite filter element and water purifier

Info

Publication number: CN111111290A
Application number: CN201811289015.9A
Authority: CN
Inventors: 桂鹏; 李杨敏; 高宏
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-08

Abstract

The invention discloses a front-rear composite filter element and a water purifier, wherein the front-rear composite filter element comprises: inner filter core, outer filter core, water route spacer cylinder, end cover subassembly. The inner filter element and the outer filter element form a cylinder shape, an inner flow channel is limited in the inner filter element, and the outer filter element is sleeved on the outer side of the inner filter element. The water route interval barrel casing is between interior filter core and outer filter core, prescribes a limit to the interior passageway of interval between water route interval barrel and the interior filter core, prescribes a limit to the outer passageway of interval between water route interval barrel and the outer filter core, prescribes a limit to the outer passageway of interval between passageway of interval and the outer passageway of interval and separates through water route interval barrel. The end cover components are matched at two ends of the outer filter element, and are provided with inner core openings communicated with the inner flow channels, inner road openings communicated with the spaced inner road flow channels and outer road openings communicated with the spaced outer road flow channels. The front and rear composite filter elements are integrally designed, so that the installation space is saved, the replacement is easy, and more purification functions are realized.

Description

Front-rear composite filter element and water purifier

Technical Field

The invention belongs to the technical field of water purification, and particularly relates to a front-rear composite filter element and a water purifier.

Background

The tap water delivered to each user from a municipal water plant will typically contain a certain amount of salt ions, metallic substances, chlorides, microorganisms, silt, etc. In order to improve the drinking water quality, more and more families choose to install water purifiers on the water outlet pipe of tap water, and filter elements with multiple functions are arranged in the water purifiers so as to remove different types of harmful substances in the tap water.

Generally, current purifier filter core is generally 3 ~ 4 grades, and some producer's purifier filter core is two cores. In order to obtain better quality drinking water, often adopt multistage filter core to establish ties, each filter core makes a functional filtering component respectively alone, and installation, the change of whole set of filter core are complicated, and occupation space is big, and the replacement cost is high, has reduced user's the core experience of changing.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the front-rear composite filter element is high in integration level, small in occupied space and simple to replace.

The invention also aims to provide a water purifier based on the front and rear composite filter elements.

According to the embodiment of the invention, the front-rear composite filter element comprises: an inner filter element formed in a cylindrical shape, the inner filter element defining an inner flow passage therein; the outer filter element is formed into a cylindrical shape, and the outer filter element is sleeved on the outer side of the inner filter element; the water path spacing cylinder is sleeved between the inner filter element and the outer filter element, a spacing inner path flow channel is defined between the water path spacing cylinder and the inner filter element, a spacing outer path flow channel is defined between the water path spacing cylinder and the outer filter element, and the spacing inner path flow channel and the spacing outer path flow channel are separated by the water path spacing cylinder; the end cover assembly is matched with two ends of the outer filter element and is provided with an inner core opening communicated with the inner flow passage, an inner intersection communicated with the interval inner path flow passage and an outer intersection communicated with the interval outer path flow passage.

According to the front-rear composite filter element provided by the embodiment of the invention, the inner filter element is sleeved in the outer filter element, but a flow passage between the inner filter element and the outer filter element is separated by the water passage spacing cylinder, so that the two filter elements cannot interfere with each other during working, the total space occupied by the two filter elements is similar to the space occupied by the outer filter element, and the external installation space occupied by the inner filter element during installation is saved. Two kinds of filter cores are integrated as an organic whole, and the end cover subassembly at both ends can completely cut off the water inlet and the water outlet of each filter core, controls the water inlet direction and the water outlet direction of each filter core, also conveniently changes a filter core alone. The front and rear composite filter element supports and installs the two ends of the axial direction by the end cover component, two different purification water paths are formed by the water path separation barrel, the front and rear composite filter element can be integrally disassembled and assembled by the end cover component, and the front and rear composite filter element can be more conveniently and quickly installed and replaced. The front-back composite filter element realizes the integrated design of small volume and large flux, not only realizes the size reduction of the whole machine, but also improves the core changing experience of a user and reduces the core changing cost of the user for the user through the integrated core changing, and meanwhile, has obvious help to the manufacturing process of the whole machine.

The front-rear composite filter element according to one embodiment of the invention further comprises: the interval support is arranged in the interval outer channel flow channel.

According to a further embodiment of the present invention, the partition bracket is cylindrical and has a grid shape, and the partition bracket is sleeved outside the waterway partition barrel.

According to a front-to-back composite filter element of one embodiment of the present disclosure, the end cap assembly comprises: the first inner end cover is matched with one end of the inner filter element and seals the inner flow channel, the first outer end cover is matched with the outer filter element and is connected with the water path spacing cylinder, and the first outer end cover is provided with the inner intersection.

According to a further embodiment of the present invention, the inner junction is disposed opposite to the first inner end cap, the first inner end cap contacts the first outer end cap when a force is applied to the first outer end cap, and the inner junction communicates with the spaced inner path flow passage when water entering the inner junction pushes the first inner end cap open.

According to a further embodiment of the present invention, the waterway spacer cylinder and the first outer end cover are integrally formed.

According to a front-to-back composite filter element of one embodiment of the present disclosure, the end cap assembly comprises: the second inner end cover is matched with the inner filter element, the inner core opening is formed in the second inner end cover, and the outer intersection sleeved on the inner core opening is formed in the second outer end cover.

According to a further embodiment of the invention, the end cap assembly comprises: the second middle end cover is matched on the waterway spacer cylinder, and the outer intersection is defined between the second outer end cover and the second middle end cover.

According to a further embodiment of the present invention, the second center cap contacts the second outer cap and seals the outer port when the second center cap is acted upon by a force directed toward the second outer cap, and communicates with the outer port when the second center cap is squeezed open by the flow of water in the spaced outer flow path.

According to the front-rear composite filter element provided by the embodiment of the invention, the outer filter element is a wound roll formed by rolling non-woven fabrics, polypropylene layers and carbon fibers.

The water purifier provided by the embodiment of the invention comprises the front and rear composite filter elements.

According to the water purifier disclosed by the embodiment of the invention, the integrated front and rear composite filter elements are adopted, so that the size of the whole water purifier is reduced, the occupied space is small, and the water purifier is convenient to install. The integration and composition are the development trend of the future water purifier, for a user, the core replacement is integrated, the core replacement experience of the user is improved, the core replacement cost of the user is reduced, and the manufacturing process of the whole water purifier is simplified.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic external view of a front-rear composite filter element according to an embodiment of the present invention.

Fig. 2 is a schematic longitudinal sectional structure diagram of a front-rear composite filter element according to an embodiment of the invention.

Fig. 3 is a bottom view of the end cap assembly of the lower portion of fig. 1.

Fig. 4 is a top view of the end cap assembly of the upper portion of fig. 1.

FIG. 5 is a schematic longitudinal sectional view of the upper endcap assembly of FIG. 2, with the upper endcap removed.

FIG. 6 is a schematic longitudinal sectional view of the lower endcap assembly of FIG. 2 with the lower endcap removed.

Fig. 7 is a schematic view of a front-to-back composite filter element disposed in a composite filter element assembly according to an embodiment of the present invention.

Reference numerals:

a front and a rear composite filter element 100;

an inner filter element 10; a spacer bracket 101; an inner flow passage 11; an inner core orifice 110; an interior intersection 120; an exterior intersection 130; an interval inner path flow passage 12; an interval outer passage 13;

an outer filter element 20;

a waterway spacer cylinder 30;

an end cap assembly 40;

a first inner end cap 41; a first flange 411; a first flange 412;

a first outer end cap 42; a first recess 421; a boss 422; a first external interface 423;

a second inner end cap 43; a second flange 431; a second flange 432;

a second outer end cap 44; a second groove 441; the second external interface 442;

a second middle end cap 45;

a seal 50;

a composite filter element assembly 1000;

a housing 300; a bottle cap 310; a bottle 320.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A front-to-back composite filter cartridge 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

A front-rear composite filter element 100 according to an embodiment of the present invention, as shown in fig. 1 and 2, includes: inner filter element 10, outer filter element 20, water way spacer cylinder 30, end cap assembly 40.

Specifically, the inner cartridge 10 is formed in a cylindrical shape, and the inner cartridge 10 defines an inner flow passage 11 therein. The outer cartridge 20 is also formed in a cylindrical shape, and the outer cartridge 20 is fitted over the outer side of the inner cartridge 10. The inner filter element 20 and the outer filter element 10 are nested, so that the installation space is saved, and the integration level is high. The cylindrical inner filter element 10 and the cylindrical outer filter element 20 are convenient to process and manufacture and are also convenient to nest and integrate.

As shown in fig. 2, the waterway spacer 30 is sleeved between the inner filter element 10 and the outer filter element 20, a spacing inner channel 12 is defined between the waterway spacer 30 and the inner filter element 10, a spacing outer channel 13 is defined between the waterway spacer 30 and the outer filter element 20, and the spacing inner channel 12 and the spacing outer channel 13 are separated by the waterway spacer 30. The waterway separating cylinder 30 separates the inner filter element 10 from the outer filter element 20, so that the flow passages of the two filter elements are separated, the two filter elements are independent and do not interfere with each other during working, and two mutually independent purification waterways can be formed. The water outlet of one of the purification water paths can be directly used as the water inlet of the other purification water path; the water outlet of one of the purification water paths can be used as the water inlet of the other purification water path after being filtered by other external filtering components.

The end cap assembly 40 is fitted at both ends of the outer filter element 20, and the end cap assembly 40 is provided with an inner core port 110 communicated with the inner flow passage 11, an inner passage port 120 communicated with the spaced inner passage 12, and an outer passage port 130 communicated with the spaced outer passage 13.

Wherein, the outer passage port 130 is communicated with the spaced outer passage channel 13, and water to be treated (such as tap water) can enter the spaced outer passage channel 13 after being purified by the outer filter element 20 from the outer peripheral surface of the outer filter element 20 and is discharged from the outer passage port 130. The water to be treated can also enter the spaced outer passage 13 from the outer passage port 130, and then is purified by the outer filter element 20 and then flows to the outer peripheral side of the outer filter element 20 to be discharged.

The inner intersection 120 is communicated with the interval inner passage 12, and the interval inner passage 12 is introduced with the water inlet of another waterway, purified by the inner filter element 10, enters the inner passage 11, and then is discharged from the inner core opening 110. The water in the other waterway can also enter the inner channel 11 from the inner core port 110, and after being purified by the inner filter element 10, the water flows through the separated inner channel 12 and is discharged from the inner channel port 120.

The cooperation of the end cap assembly 40 and the waterway spacer 30 controls the filtering direction, the water inlet direction and the water outlet direction of each filter element of the front and rear composite filter elements 100.

Specifically, when the water flows through the inner filter element 10 and the outer filter element 20, most of the water flows through the front and rear composite filter elements 100 in the radial direction, the passing path is short, the flow rate is large, impurities on the surface of the filter elements are washed away when the water flows through the front and rear composite filter elements in the radial direction, and the water flows through the filter elements after the impurities are more easily washed away. Most of water flows basically flow along the axial direction when water enters and exits from each filter element, so that the uniform distribution of the water flows is facilitated, impurities washed from the surfaces of the filter elements are brought to the axial ends of the front and rear composite filter elements 100, and the impurities are prevented from being blocked on the surfaces of the filter elements.

The end cover assembly 40 enables the inner filter element 10, the outer filter element 20 and the waterway spacer cylinder 30 to form relatively fixed independent flow passages, an inner core port 110 communicated with the inner flow passage 11 is formed, an outer passage port 130 communicated with the waterway spacer outer passage 13 is formed, and an inner passage port 120 communicated with the waterway spacer inner passage 12 is formed; the end cap assembly 40 provides support and sealing.

The front and rear composite filter element 100 is supported and installed at two axial ends by the end cover assembly 40, two different purification water paths are formed by the water path spacing cylinder 30, the front and rear composite filter element 100 can be integrally disassembled and assembled through the end cover assembly 40, and the front and rear composite filter element 100 can be installed and replaced more conveniently and quickly. The front-back composite filter element 100 realizes the integrated design of small volume and large flux, not only realizes the size reduction of the whole machine, but also improves the core changing experience of a user and reduces the core changing cost of the user for the user through the integrated core changing, and meanwhile, has obvious help for the manufacturing process of the whole machine.

In some embodiments of the present disclosure, as shown in fig. 2, front-to-back composite filter element 100 further comprises: and a spacing bracket 101, wherein the spacing bracket 101 is arranged in the spacing external passage 13. The spacing bracket 101 is disposed between the inner circumferential surface of the outer filter element 20 and the outer circumferential surface of the water path spacing cylinder 30, and can respectively support the outer filter element 20 and the water path spacing cylinder 30, so that a fixed relative distance is maintained between the two, the spacing outer path flow channel 13 maintains a specific shape, the flow channel has a certain width, and good fluid flow performance is ensured.

Optionally, the spacer bracket 101 is cylindrical and has a grid shape, and the spacer bracket 101 is sleeved outside the waterway spacer cylinder 30. The grid-shaped spacing bracket 101 saves materials, so that the supporting framework is lighter, and the lightweight design of the filter element is facilitated; the circulation of the fluid in the interval external passage 13 is convenient, and the flow resistance is small; facilitating the mounting and fixation of the spacer bracket 101.

Optionally, the spacer bracket 101 is co-rolled with the outer cartridge 20. The spacing bracket 101 can ensure the tightness and strength of the overall rolling of the outer filter element 20.

In some embodiments of the present invention, the inner cartridge 10 and the outer cartridge 20 are coaxially arranged, and the axial length of the inner cartridge 10 is less than the axial length of the outer cartridge 20. The processing and manufacturing are convenient, and the integrated design is convenient. Of course, the axial length of the inner filter element 10 may be greater than that of the outer filter element 20, and the axial length of the inner filter element 10 may be equal to that of the outer filter element 20, which is not limited herein.

Optionally, the outer filter element 20 is a roll made of non-woven fabric, polypropylene layer, and carbon fiber. Small volume and long service life. When the filter is used for filtering tap water, silt, rust and residual chlorine can be removed preliminarily. Of course, the outer filter element 20 may be made by rolling only one or two filter layers, and is not limited in particular.

Optionally, the inner cartridge 10 is a hollow carbon rod. The carbon rod can be used for final filtration of tap water, and can filter off peculiar smell, organic matters, colloid, iron, residual chlorine and the like in a water body, so that the inner filter element 10 further adjusts the water quality condition and improves the taste. Of course, the inner filter element 10 may also be formed by combining activated carbon particles, a filter screen and a frame, and is not limited to the arrangement form of the carbon rods. In addition, the carbon filter medium can also be replaced by a KDF55 processing medium (high-purity copper/zinc alloy), residual chlorine in water is removed through electrochemical reaction, mineral scaling is reduced, suspended solid matters such as ferrous oxide and the like are reduced, microorganisms are inhibited, and heavy metals are removed.

In some embodiments of the present invention, as shown in fig. 2, 3, 5, the end cap assembly 40 includes: a first inner end cap 41 and a first outer end cap 42, the first inner end cap 41 is fitted to one end of the inner filter element 10 and closes the inner flow channel 11, the first outer end cap 42 is fitted to the outer filter element 20 and connected to the waterway spacer 30, and the first outer end cap 42 is provided with an inner intersection 120.

Here, the first inner end cap 41 provides support for the bottom of the inner filter element 10 and closes the bottom of the inner flow channel 11 of the inner filter element 10, so that the two fluids in the inner flow channel 11 inside the inner filter element 10 and the inner flow channel 12 outside the inner filter element 10 are not in series flow from the bottom, and are kept separate, one side is the purified fluid and the other side is the fluid to be purified.

Accordingly, the first outer end cap 42 provides support for the bottom of the outer cartridge 20 and seals the bottom of the spaced outer flow channels 13 of the outer cartridge 20, keeping the two fluids separated in the flow channels outside the outer cartridge 20 and the spaced outer flow channels 13 inside the outer cartridge 20, one side being the purified fluid and the other side being the fluid to be purified.

The first outer end cap 42 is connected to the waterway spacer 30, so as to further ensure that the waterway spacer 30 has a relatively fixed position between the outside interval channel 13 and the inside interval channel 12, prevent the waterway spacer 30 from shifting due to too large flow rate or too large pressure on one side of the fluid in the outside interval channel 13 and the inside interval channel 12, and prevent different fluids from streaming.

Optionally, the periphery of the first inner end cap 41 is provided with an upward first flange 411, and an inner side surface of the first flange 411 contacts with the outer peripheral surface of the inner filter element 10. The first flange 411 makes the connection between the first inner end cap 41 and the inner filter element 10 more tight, increases the reliability of the connection, further prevents the fluid in the spaced inner flow passage 12 from flowing into the inner flow passage 11 from the bottom of the inner filter element 10, and ensures the filtering effect of the inner filter element 10.

Optionally, first inner end cap 41 is provided with a first flange 412 extending into inner flow channel 11, and an outer circumferential surface of first flange 412 contacts an inner circumferential surface of inner filter element 10. First flange 412 further reinforces the connection between first inner end cap 41 and inner cartridge 10, preventing liquid in inner flow passage 11 from permeating outwardly from the bottom of inner cartridge 10.

Optionally, the first outer end cap 42 is provided with a first groove 421, and the bottom of the outer filter element 20 and the spacing bracket 101 are fitted in the first groove 421. The outer peripheral surface of the outer filter element 20 is attached to the peripheral surface of the first groove 421, the inner peripheral surface of the spacing support 101 is attached to the peripheral surface of the first groove 421, and the bottom surfaces of the outer filter element 20 and the spacing support 101 are attached to the groove surface of the first groove 421. The arrangement of the first groove 421 facilitates the fixed installation of the outer filter element 20 and the spacing support 101, further increases the connection between the outer filter element 20, the spacing support 101 and the first outer end cover 42, ensures that the fluid outside the outer filter element 20 and different water paths in the spacing outer path flow channel 13 do not cross flow, and ensures the filtering performance of the outer filter element 20.

Alternatively, the middle of the first outer end cap 42 protrudes upward to form a boss 422, and the first inner end cap 41 is suspended above the boss 422. That is, a gap is formed between the first inner end cap 41 and the boss 422, so that the communication between the inner path port 120 and the partitioned inner path flow passage 12 is performed under appropriate conditions.

Alternatively, the outer peripheral wall of the boss 422 constitutes the inner peripheral surface of the first recess 421. That is, the inner circumferential surface of the spacer holder 101 is in contact with the outer circumferential wall of the boss 422, thereby simplifying the internal support structure.

Optionally, a lower portion of the boss 422 extends downward to form a first external interface 423, and the internal port 120 is formed in the first external interface 423. The first external interface 423 can be used for connecting an external pipe or other filter element assembly, and the length of the first external interface 423 can be designed according to requirements.

Optionally, a seal 50 is provided at the first outer junction 423 to separate fluid entering the inner junction 120 from other fluid paths to the outside.

Specifically, the inner path opening 120 is disposed opposite to the first inner end cap 41, the first inner end cap 41 contacts with the first outer end cap 42 when being applied with a force toward the first outer end cap 42, and communicates with the partitioned inner path flow passage 12 when the first inner end cap 41 is pushed open by water entering the inner path opening 120. The interior intersection 120 provides access for the fluid to be purified of the inner cartridge 20 to facilitate the entry of the fluid to be purified into the spaced interior flow channels 12. It should be noted here that the first inner end cap 41 and the first outer end cap 42 are not stably connected, and the first inner end cap 41 and the first outer end cap 42 are in close contact only when the first inner end cap 41 is subjected to a pressing force toward the first outer end cap 42. When the first inner end cap 41 is pressed away from the first outer end cap 42, a gap is formed therebetween, and the fluid enters the partitioned inner path flow passage 12 from the inner path opening 120. Optionally, the waterway spacer 30 and the first outer end cap 42 are integrally formed, and the integral formation facilitates processing and manufacturing. After the integral forming, a gap is not easy to appear between the waterway spacer cylinder 30 and the first outer end cover 42, and the position is relatively stable. The integrated molding is also convenient for assembly, and ensures that the flow between the interval inner passage 12 and the interval outer passage 13 is not easy to flow in series after long-term use. And the inner filter element 10 and the outer filter element 20 can be well supported after the integral piece is formed.

In some embodiments of the present invention, as shown in fig. 2, 4, 6, the end cap assembly 40 further comprises: the second inner end cap 43 is fitted on the inner filter element 10, the second inner end cap 43 is provided with an inner core opening 110, and the second outer end cap 44 is provided with an outer intersection 130 which is sleeved on the inner core opening 110.

Here, second inner end cap 43 provides a stop and seal for the top of inner cartridge 10 so that the two fluids in inner flow passage 11 and spaced inner flow passage 12 do not cross over the top of inner cartridge 10. The second inner end cap 43 and the first inner end cap 41 together provide support and limit for the inner cartridge 10, ensuring the overall filtering effect of the inner cartridge 10. The fluid filtered by the inner filter element 10 is collected in the inner flow passage 11 and discharged to the outside through the inner filter opening 110.

Accordingly, second outer end cap 44 provides a stop and seal for the top of outer cartridge 20 so that flow passages external to outer cartridge 20 and the fluid in alternate outward flow passages 13 do not cross over from the top. The second outer end cap 44 and the first outer end cap 42 together provide support and a stop for the outer filter element 20, ensuring the overall filtering effect of the outer filter element 20. The fluid filtered by the outer filter element 20 collects in the alternate outer flow path 13 and is discharged outwardly through the outer port 130.

Optionally, a second inward flange 431 is provided around the second inward end cap 43, and an inner side surface of the second flange 431 contacts with the outer peripheral surface of the inner filter element 10. The second flange 431 makes the connection between the second inner end cap 43 and the inner filter element 10 more tight, increases the reliability of the connection, further prevents the fluid in the spaced inner flow passage 12 from flowing into the inner flow passage 11 from the top of the inner filter element 10, and ensures the filtering effect of the inner filter element 10.

Optionally, the second inner end cap 43 is provided with a second flange 432 extending into the inner flow channel 11, and an outer circumferential surface of the second flange 432 contacts an inner circumferential surface of the inner filter element 10. The second flange 432 further reinforces the connection between the second inner end cap 43 and the inner cartridge 10, preventing liquid in the inner flow passage 11 from permeating outwardly from the top of the inner cartridge 10. The second inner end cap 43 is accurately positioned when mounted on top of the inner cartridge 10. Optionally, a second groove 441 is provided on second outer end cap 44, and the top of outer cartridge 20 and spacer bracket 101 fit within second groove 441. The outer peripheral surface of the outer filter element 20 is attached to the outer peripheral surface of the second groove 441, the outer peripheral surface of the spacing support 101 is in contact with the inner peripheral surface of the second groove 441, and the top surfaces of the outer filter element 20 and the spacing support 101 are attached to the groove surface of the second groove 441. The arrangement of the second groove 441 further increases the connection between the outer filter element 20 and the spacing bracket 101 and the second outer end cover 44, so that the fluid outside the outer filter element 20 and different water qualities in the spacing outer passage flow channel 13 are prevented from streaming, and the filtering performance of the outer filter element 20 is ensured.

Alternatively, the second outer end cap 44 projects upward at a middle portion thereof to form a second outer port 442, the second inner end cap 43 extends upward at a middle portion thereof to form an inner core aperture 110, a top portion of the inner core aperture 110 is flush with a top portion of the second outer port 442, and the inner core aperture 110 and the second outer port 442 are spaced apart in the radial direction. The second outer ports 442 spaced apart in the radial direction and the inner core ports 110 leave a space therebetween to define the outer ports 130. The top flush facilitates final assembly.

Optionally, a sealing member 50 is provided on the second outer port 442 to separate the fluid to be filtered from the fluid filtered by the outer cartridge 20.

In some embodiments of the present invention, as shown in FIG. 2, the end cap assembly 40 further comprises: a second center end cap 45, the second center end cap 45 fitting over the waterway spacer cylinder 30, the second outer end cap 44 and the second center end cap 45 defining an exterior mouth 130 therebetween. The second center end cover 45 further separates the spaced outer flow passage 13 from the spaced inner flow passage 12 and seals the top of the spaced inner flow passage 12 to prevent the fluid in the spaced inner flow passage 12 from mixing with the fluid in the other flow passages.

Set up end cover 45 in the second, rather than with end cover 45 and water route spacer cylinder 30 integrated into one piece in the second, be favorable to the die sinking on the one hand, on the other hand is the assembly needs, improves the reliability of whole assembly.

In the embodiment of the present invention, the second middle end cap 45 may not be provided, so that the waterway spacer 30 may be directly connected to the second inner end cap 43, and the second inner end cap 43 and the second outer end cap 44 define the external access port 130 therebetween. This saves the number of parts. However, since the second filter member 20 is to be assembled to the inner side of the waterway spacer 30, the waterway spacer 30 cannot be installed if the opening is small, and the assembly of the second outer end cap 44 and the first filter member 10 is affected if the opening of the waterway spacer 30 is large, which increases the difficulty of the overall assembly.

Therefore, the second middle end cover 45 is provided, when in assembly, parts such as the second filter piece 20 and the like are firstly arranged in the waterway spacer cylinder 30, and then the second middle end cover 45 is connected to the waterway spacer cylinder 30, so that the assembly requirement is met, and the reliability of the whole assembly is improved. On the other hand, when the waterway spacer 30 and the first outer end cap 42 are integrally formed, they can be manufactured by an integral injection molding method, and at this time, the second middle end cap 45 should not be integrally injection molded for convenience of mold opening.

Optionally, an upper portion of the second middle end cap 45 extends to be flush with the top of the second outer port 442, a lower portion of the second middle end cap 45 extends to overlap the outer wall of the waterway spacer 30, and a sealing member 50 is additionally arranged between the second middle end cap 45 and the waterway spacer 30. The design of top parallel and level, the convenient assembly.

Alternatively, the second center cover 45 contacts the second outer cover 44 and seals the outer port 130 when acted upon by a force directed toward the second outer cover 44, and communicates with the outer port 130 when the second center cover 45 is forced open by the flow of water in the spaced outer flow path 13.

Optionally, a certain gap is left between the second middle end cover 45 and the end of the second groove 441, so that the spaced outer passage channel 13 is communicated with the outer intersection 130, and smooth water outlet is ensured.

Optionally, a spacing bracket 101 is connected in the gap between the second middle end cap 45 and the second groove 441. Ensure the smooth water outlet of the separated external channel 13.

In the example of fig. 2, the small distance between the second center end cap 45 and the second outer end cap 44 allows for a delicate balancing of the water pressure as it passes through the first filter element 10. That is, when the water pressure inside the waterway spacer 46 is higher than the water pressure outside, the second middle cap 45 may be pressed against the second outer cap 44, and the filtering speed of the first filter element 10 is slowed down. During normal operation, the water pushes the second middle end cover 45 open and flows normally toward the second inlet/outlet 102. Specifically, the upper end of the inner cartridge 10 is glued to the second inner end cap 43, and the lower end of the inner cartridge 10 is glued to the first inner end cap 41, which not only facilitates assembly, but also facilitates installation of the integrated cartridge. Optionally, the upper end and the lower end of the inner filter element 10 are respectively connected to the second inner end cap 43 and the first inner end cap 41 through a circle of hot melt adhesive in a sealing manner.

Specifically, the upper end of the outer cartridge 20 is glued to the second outer end cap 44 and the lower end of the outer cartridge 20 is glued to the first outer end cap 42, which not only facilitates assembly, but also facilitates installation of the integrated cartridge. Optionally, the upper and lower ends of the outer filter element 20 are respectively connected to the second outer end cap 44 and the first outer end cap 42 by a ring of hot melt adhesive.

In some embodiments, all of the components of the front-to-back composite filter element 100 are pre-assembled into a single piece, i.e., the inner filter element 10, the outer filter element 20, the first inner end cap 41, the first outer end cap 42, the second inner end cap 43, the second outer end cap 44, and the second middle end cap 45 are pre-joined into a front-to-back integrated filter element. Even the seal 50, may be preassembled.

The front-rear integrated filter element can be directly inserted between the supporting plate and the bottle cap 310 in the shell 300 during assembly, and the assembly process of the whole machine is greatly simplified. Moreover, if the bottle cap 310 is detachably connected to the bottle body 320, the user can replace the front-rear integrated filter element 100 by himself after using the bottle cap, and the operation steps of the user during replacement are very easy, so that the core replacement experience of the user is improved, and the core replacement cost is reduced.

The water purifier according to the embodiment of the invention comprises the front and rear composite filter elements 100. The water purifier can be used for purifying tap water.

The front and rear composite filter element 100 is beneficial to the function diversification of the whole water purifier, the front and rear composite filter element 100 is adopted, the integrated design of small volume and large flux is realized, the size reduction of the whole water purifier is realized, and the integrated design is convenient to install and replace. For a user, the core is replaced integrally, so that the core replacing experience of the user is improved, the core replacing cost of the user is reduced, meanwhile, the manufacturing process of the whole machine is obviously assisted, and the reliability is high.

To better understand the aspects of the embodiments of the present invention, the structure of a front-back composite filter element 100 in one embodiment of the present invention is described below with reference to fig. 1-7.

As shown in fig. 1 and 2, a front-rear composite filter element 100 includes a cylindrical outer filter element 20, a cylindrical inner filter element 10 sleeved inside the outer filter element 20, a water path spacer cylinder 30 disposed between the inner filter element 10 and the outer filter element 20, and end cap assemblies 40 disposed at two ends of the inner filter element 10 and the outer filter element 20.

As shown in fig. 2, the inner filter element 10, the outer filter element 20 and the water path spacer cylinder 30 are coaxially arranged, an inner flow channel 11 is defined in the inner filter element 10, an inner spacing flow channel 12 is defined between the water path spacer cylinder 30 and the inner filter element 10, an outer spacing flow channel 13 is defined between the water path spacer cylinder 30 and the outer filter element 20, and the inner spacing flow channel 12 and the outer spacing flow channel 13 are separated by the water path spacer cylinder 30.

The cylindrical and grid-shaped spacing support 101 is arranged in the spacing outer channel flow passage 13, the spacing support 101 is sleeved outside the water channel spacing cylinder 30, and the spacing support 101 and the outer filter element 20 are rolled together.

The filter layer of the outer filter element 20 comprises a non-woven fabric layer, a polypropylene layer and a composite layer rolled by a carbon fiber layer, and the outer filter element 20 is used as a primary filter element of tap water.

The inner filter element 10 is a hollow carbon rod and is used for final-stage filtration before tap water is used as drinking water.

The end cover assembly 40 is provided with an inner core port 110 communicated with the inner flow passage 11, an inner passage port 120 communicated with the spaced inner passage 12 and an outer passage port 130 communicated with the spaced outer passage 13.

As shown in fig. 2, 3, 4, 5 and 6, the end cap assembly 40 includes a first inner end cap 41 and a first outer end cap 42 disposed at the bottom of the front-rear composite filter element 100, and a second inner end cap 43, a second outer end cap 44 and a second middle end cap 45 disposed at the top of the front-rear composite filter element 100.

As shown in fig. 3 and 5, the first inner end cap 41 is fitted to the bottom end of the inner filter element 10 and closes the inner flow passage 11, an upward first flange 411 is provided around the first inner end cap 41, and an inner side surface of the first flange 411 contacts with an outer peripheral surface of the inner filter element 10. First inner end cap 41 is provided with first flange 412 extending into inner flow passage 11, and the outer peripheral surface of first flange 412 contacts the inner peripheral surface of inner filter element 10.

As shown in fig. 5, a first outer end cap 42 is fitted over the bottom end of the outer cartridge 20. The first outer end cap 42 is provided with a first groove 421, and the bottom of the outer filter element 20 and the spacing bracket 101 are fitted in the first groove 421. The middle of the first outer end cap 42 protrudes upwards to form a boss 422, and a gap is left between the boss 422 and the first inner end cap 41. The lower portion of the boss 422 extends downward to form a first outer interface 423, and an inner path opening 120 which opens toward the first inner end cover 41 is formed in the first outer interface 423. The inner intersection 120 is disposed opposite to the first inner end cap 41, the first inner end cap 41 contacts the first outer end cap 42 when a force is applied to the first outer end cap 42, and communicates with the partitioned inner path flow passage 12 when the inner intersection 120 pushes the first inner end cap 41 open. The first outer end cap 42 is integrally formed with the waterway spacer tube 30. The first external interface 423 is externally provided with a sealing member 50.

As shown in fig. 4 and 6, the second inner end cap 43 is fitted on the inner core 10, a downward second flange 431 is provided around the second inner end cap 43, the upper end of the second flange 431 is exposed in the spaced inner flow passage 12, and the inner side surface of the second flange 431 is in contact with the outer peripheral surface of the inner core 10. The second inner end cap 43 is provided with a second flange 432 extending into the inner flow path 11, and the outer peripheral surface of the second flange 432 is in contact with the inner peripheral surface of the inner filter element 10. The middle portion of the second inner end cap 43 extends upward to form an inner core hole 110.

The second outer cap 44 is fitted on the top of the outer filter element 20, the second outer cap 44 is provided with a second groove 441, the top of the outer filter element 20 and the spacing bracket 101 are fitted in the second groove 441, the middle of the second outer cap 44 protrudes upwards to form a second outer joint 442, the top of the second outer joint 442 is flush with the top of the inner core opening 110, and the inner core opening 110 and the second outer joint 442 are spaced in the radial direction.

A second center cap 45 fits over the waterway spacer cylinder 30, and an exterior mouth 130 is defined between the second outer cap 44 and the second center cap 45. The upper portion of the second middle endcap 45 extends flush with the top of the second external port 442. The second middle end cap 45 is provided with a seal 50 on the outside.

When the tap water enters the partitioned outer path flow passage 13 from the outer peripheral wall of the outer filter element 20 through the first evolution, the tap water is discharged through the outer path port 130. Other filter element assemblies can be connected between the outer road junction 130 and the inner road junction 120, so that water quality purification is increased for one time, and then the water enters the inner road junction 120; or can be directly communicated by a pipeline to form a two-stage filter element connected in series. The tap water finally filtered by the primary filtration enters the inner flow passage 12 at the outer side of the inner filter element 10, and the drinking water filtered by the inner filter element 10 enters the inner flow passage 11 and flows out from the inner core opening 110 for drinking.

In the example shown in fig. 7, the composite filter element assembly 1000 of the water purifier adopts the front and rear composite filter elements 100. Specifically, the housing of the composite filter cartridge assembly 1000 includes a bottle body 320 and a bottle cap 310, the bottle cap 310 being capped at one end of the bottle body 320. After the front-back composite filter element 100 is adopted, the bottoms of the front-back composite filter element 100 are connected to the bottle body 320 in an inserting mode, and the tops of the front-back composite filter element 100 are connected to the bottle cap 320 in an inserting mode. When installing, the front and rear composite filter cartridges 100 may be installed in advance as one body and then integrally installed in the housing 300.

In the description of the present invention, it is to be understood that the terms "longitudinal," "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The rolling of the front and rear composite cartridges and the outer cartridge 20 in the water purifier according to embodiments of the present invention is known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of "one embodiment," "some embodiments," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a leading and trailing composite filter element which characterized in that includes:

an inner filter element formed in a cylindrical shape, the inner filter element defining an inner flow passage therein;

the outer filter element is formed into a cylindrical shape, and the outer filter element is sleeved on the outer side of the inner filter element;

the water path spacing cylinder is sleeved between the inner filter element and the outer filter element, a spacing inner path flow channel is defined between the water path spacing cylinder and the inner filter element, a spacing outer path flow channel is defined between the water path spacing cylinder and the outer filter element, and the spacing inner path flow channel and the spacing outer path flow channel are separated by the water path spacing cylinder;

the end cover assembly is matched with two ends of the outer filter element and is provided with an inner core opening communicated with the inner flow passage, an inner intersection communicated with the interval inner path flow passage and an outer intersection communicated with the interval outer path flow passage.

2. The tandem composite cartridge according to claim 1, further comprising: the interval support is arranged in the interval outer channel flow channel.

3. The tandem composite filter element according to claim 2, wherein the spacer bracket is cylindrical and is in a grid shape, and the spacer bracket is sleeved outside the waterway spacer cylinder.

4. The tandem composite cartridge according to claim 1 wherein the end cap assembly comprises: the first inner end cover is matched with one end of the inner filter element and seals the inner flow channel, the first outer end cover is matched with the outer filter element and is connected with the water path spacing cylinder, and the first outer end cover is provided with the inner intersection.

5. The tandem composite cartridge of claim 4 wherein said interior mouth is disposed opposite said first interior end cap, said first interior end cap contacting said first exterior end cap when subjected to a force directed toward said first exterior end cap and communicating with said spaced interior channel flow passage when water entering said interior mouth pushes said first interior end cap open.

6. The tandem composite filter element according to claim 4, wherein the waterway spacer tube is integrally formed with the first outer end cap.

7. The tandem composite cartridge according to claim 1 wherein the end cap assembly comprises: the second inner end cover is matched with the inner filter element, the inner core opening is formed in the second inner end cover, and the outer intersection sleeved on the inner core opening is formed in the second outer end cover.

8. The tandem composite cartridge according to claim 7 wherein the end cap assembly comprises: the second middle end cover is matched on the waterway spacer cylinder, and the outer intersection is defined between the second outer end cover and the second middle end cover.

9. The tandem composite filter element according to claim 7 wherein said second center cap contacts said second outer cap and seals said outer port when subjected to a force directed toward said second outer cap, and communicates with said outer port when water flow in said spaced outer flow path pushes said second center cap open.

10. The front-rear composite filter element as claimed in any one of claims 1 to 9, wherein the outer filter element is a roll made of non-woven fabric, polypropylene layer, carbon fiber.

11. A water purification machine, comprising a front-rear composite filter element according to any one of claims 1-10.