CN210313757U - Filter core assembly with nested filter screens - Google Patents

Abstract

The application discloses nested filter element group spare of filter screen, this filter element group spare include the casing, set up first filter unit in the casing and inlay the filter screen of setting in first filter unit, and along the water route flow direction in the filter element group spare, the filter screen is located first filter unit's upstream. According to the filter element assembly, the filter screen is arranged, so that the first filter unit is protected, the service life of the first filter unit is prolonged, the allowable raw water quality range of the filter element assembly is expanded, the application area is wider, the practicability is higher, and the large-scale popularization and application of water purification products are facilitated; the filter screen has the advantages of small volume, low cost, simple processing technology, simple structure of the filter element component and compact installation, greatly reduces the volume of the filter element component and saves the installation space; and can inject silt etc. that produce when coarse filtration inboard at first filter unit, it is more convenient when cleaing away silt, clean maintenance is convenient, is favorable to prolonging filter element group spare life, and user experience is better.

Description

Filter core assembly with nested filter screens

Technical Field

The application belongs to the technical field of water purification equipment, especially relates to a nested filter element subassembly of filter screen.

Background

In recent years, with the continuous improvement of the living standard of people, people pay more and more attention to the quality of drinking water, so that the water purification market is fierce, and water purification products begin to be popularized and become the most potential products in the field of household appliances; meanwhile, the updating pace of water purification products is accelerated, and the industrial technology is continuously promoted. The water purification product purifies raw water through the filter element to obtain directly drinkable water. Along with the extension of service life, the filter core can be blockked up to impurity in the raw water, consequently needs regularly to unpick and wash or change the filter core to ensure water purification product normal work. Therefore, the filter element of the water purification product belongs to a consumable, and needs to be replaced after being used for a period of time, and the service life and the cost of replacing the filter element become the common pain points of consumers and manufacturers.

The filter element has the advantages that the filter element is often blocked in the process of filtering large granular substances due to large difference of water quality in various places and different sizes of the granular substances in water, the service life of the filter element is greatly shortened, the filtering effect is poor, and the use cost of the filter element is too high; large-particle impurities and dirt scale are remained on the surface of the filter element, so that the filter element is inconvenient to clean, the workload of a user is increased, and the use experience of the user is influenced; meanwhile, the water quality range of raw water suitable for the water purification product is limited, the practicability of the water purification product is reduced, and the popularization and the application of the water purification product are influenced.

The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the purpose of this application is to provide a nested filter element group spare of filter screen, and the raw water quality of water scope that can be suitable for is wider, extension filter core life, and is small moreover, simple structure, and the filter core washs and maintains the convenience, changes and maintains simple and conveniently, reduces filter element group spare use cost, promotes user's use and experiences.

To achieve the above object, the present application proposes a filter element assembly for nesting filter screens, characterized in that the filter element assembly comprises: a housing; a first filter unit disposed within the housing; and the filter screen is embedded in the first filtering unit and is arranged along the flow direction of the water path in the filter element assembly, and the filter screen is positioned at the upstream of the first filtering unit.

In one example, the filter element assembly further comprises an inner top cover arranged between the inner end surface of the shell and the first filter unit, the inner top cover is connected with the inner end surface of the shell in a sealing mode, and a raw water area is formed between the inner top cover and the inner end surface of the shell; the shell is provided with a raw water port communicated with the raw water area, and the inner side or the outer side of the filter screen is communicated with the raw water area.

In one example, the filter element assembly further comprises a water-isolating sleeve which is sleeved between the filter screen and the first filter unit and is fixedly connected with the inner top cover, and a water inlet area is defined by the inner top cover, the filter screen and the water-isolating sleeve; the water inlet area is communicated with the raw water area, and the inner side of the filter screen is communicated with the first filter unit.

In one example, the housing is further provided with a flushing port; the filter element assembly further comprises a flushing pipe which is embedded in the filter screen, one end of the flushing pipe is communicated with the flushing port, and the other end of the flushing pipe is communicated with the water inlet area.

In one example, the filter element assembly further comprises a central tube which is embedded inside the first filter unit, a first flow channel is arranged in the central tube, one end of the first flow channel is connected with the filtering rear end of the filter screen, and the other end of the first flow channel is connected with the filtering front end of the first filter unit.

In one example, an inner pipe is further arranged in the central pipe, a second flow passage is formed in the inner pipe, a flow dividing channel for communicating the water inlet area with the second flow passage is further formed in the central pipe, and the central pipe is selected to conduct the first flow passage or the second flow passage.

In one example, the filter cartridge assembly further comprises a second filter unit disposed within the housing and downstream of the first filter unit in a direction of flow of a water path within the filter cartridge assembly; the second filtering unit is a scale inhibition filter element or a bacteriostatic filter element.

In one example, the second filter unit is nested between the screen and the first filter unit.

In one example, the water purifier further comprises an inner base, an overflowing channel which is communicated with the filtering rear end of the filter screen and the filtering front end of the first filtering unit is formed between the inner base and the shell, the inner top cover and the inner wall of the shell form a water purifying area which is located below the raw water area, and the filtering rear end of the first filtering unit is communicated with the water purifying area.

In one example, a boss is arranged in the middle of the inner base, the boss is provided with a water through opening communicated with the overflowing channel, the periphery of the inner base is folded towards one side of the boss to form a flanging part, and the side wall of the first filtering unit is located between the boss and the flanging part.

Through the filter element subassembly that this application provided can bring following beneficial effect:

1. the filter screen is arranged, so that the first filter unit is protected, the service life of the first filter unit is prolonged, the allowable raw water quality range of the filter element assembly is expanded, the application area is wider, the practicability is stronger, and the large-scale popularization and application of water purification products are facilitated; the filter screen is embedded in the first filter unit, the filter screen is small in size, low in cost, simple in processing technology, simple in structure and compact in installation, the size of the filter element assembly is greatly reduced, the installation space is saved, the occupied kitchen space is reduced, the defects that different types of filter elements are different in replacement period and troublesome in replacement and maintenance are overcome, the filter element replacement frequency is reduced, the use and maintenance cost of a water purification product is reduced, the use cost of a user is reduced, and the user experience is effectively improved; the silt and the like generated in the coarse filtration can be limited at the inner side of the first filtering unit, so that the silt and the like can be removed more conveniently, the manual removal by a user is facilitated, the cleaning and the maintenance are convenient, the service life of the filter element assembly is prolonged, and the user experience is better; simultaneously, the filter element group complete machine only has a filter core, eliminates the hidden danger of leaking, and the outward appearance is pleasing to the eye, and resources are saved reduces filter element group spare manufacturing cost, increases filter core collocation mode, and the dismouting is changed and is maintained simple convenient and fast, labour saving and time saving, and assembly efficiency is high, satisfies the user to the demand of high-quality, high quality life, and user experience is better.

2. The inner top cover plays a role in mounting and fixing the first filtering unit and is axially combined with the first filtering unit, the structure is simple and compact, the assembly is convenient and fast, the efficiency is high, the volume of the filter element assembly is reduced, the occupied space is reduced, and the mounting space is saved; the inner top cover also has the water path distribution effect, the water path structure is optimized, the production of dead water is stopped, the filter screen and the filter area of the first filter unit are fully utilized, the filter efficiency is high, the water purification effect is better, and the user experience is better.

3. The water separating sleeve can limit silt and the like generated during coarse filtration in a water inlet area between the outer side of the filter screen and the water separating sleeve, and is more convenient when silt and the like are removed, convenience is brought to users for manual removal, cleaning and maintenance are convenient, and user experience is better.

4. Through the arrangement of the flushing port, the filter screen can be independently flushed without being disassembled and assembled, the service life of the filter element assembly is prolonged, the water leakage risk caused by pipeline disassembly and assembly is eliminated, the filter element assembly realizes a self-flushing function, the use of a user is more convenient and quicker, the maintenance is simple and convenient, trouble and labor are saved, the use cost is reduced, the use requirement of the user is fully met, and the use experience of the user is improved; through the flushing pipe of set up in the filter screen of cover setting, realize rivers and erode the side flow formula of filter screen, the runner is short, scouring force is big, and forms rainbow suction, and is best to the washing effect of filter screen, and the structure of washing the water route obtains optimizing, stops the production of stagnant water, prevents effectively that the sparge water from remaining, and the structure is compacter, and the whole volume of filter element group spare is littleer, saves kitchen installation space, and user experience is better.

5. The central tube can play a role in fixing and supporting the filter screen, prevent the filter screen from being washed, extruded and deformed by water flow, and ensure the strength and the filtering effect of the filter screen; the center tube still plays the water route distribution effect, and waterway structure obtains optimizing, has stopped the production of stagnant water, make full use of filter screen and first filter unit's filter area, and filtration efficiency is high, and the water purification effect is better, and simple structure is compact moreover, reduces filter element group spare volume, reduces the space and occupies, saves installation space, assembles convenient efficiency height, and the dismouting is maintained conveniently, and user experience is better.

6. The scale inhibition filter element can effectively remove the water alkali scale in the water, protect other water treatment equipment connected to the downstream of the filter element component and prolong the service life of the water treatment equipment; the bacteriostatic filter element can play the roles of removing residual chlorine, inhibiting microorganism propagation, reducing scale formation, adsorbing heavy metal ions and the like, effectively improves water quality, has a good water purification effect, protects the health of a user, and has better user experience.

7. The inner top cover and the inner base are respectively used for fixedly sealing two ends of the first filtering unit, the structure is simple and reasonable, the fixing is firm, the reliability is high, the sealing effect is better, water leakage and water overflow are effectively prevented, and the filtering effect of the first filtering unit is ensured; the inner top cover forms former water district and water purification district simultaneously, and the structure is succinct compact, and processing is simple with low costs, reduces the axial dimensions of filter element group spare greatly, saves installation space, assembles simple convenient and fast, and assembly efficiency is high, and the dismouting is maintained conveniently, and user experience is better.

8. The boss and the flanging part increase the sealing connection area of the inner base and the end part of the first filtering unit, the connection is firmer and more reliable, the sealing effect is better, the phenomena of water overflowing and water mixing are further prevented, the reliability is high, the filtering effect of the first filtering unit is ensured, and the user experience is better.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic perspective view of a nested filter element assembly according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a screen nested filter element assembly according to an embodiment of the present disclosure;

FIG. 3 is a plan cross-sectional view of a screen nested filter element assembly according to an embodiment of the present application;

FIG. 4 is a perspective cross-sectional view of a screen nested filter element assembly according to an embodiment of the present application;

FIG. 5 is a water path diagram illustrating a nested filter element assembly of a filter screen according to an embodiment of the present disclosure;

FIG. 6 is a waterway diagram illustrating a flushing state of a filter core assembly of a nested filter screen according to an embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of a composite assembly provided in accordance with an embodiment of the present application;

FIG. 8 is a cross-sectional view of another orientation of the composite assembly provided in accordance with an embodiment of the present application;

fig. 9 is a schematic perspective view of an inner top cover according to an embodiment of the present application;

fig. 10 is a schematic perspective view of a water partition provided in an embodiment of the present application;

FIG. 11 is a schematic perspective view of a center tube provided in an embodiment of the present application;

FIG. 12 is a cross-sectional view of a center tube provided in an embodiment of the present application;

FIG. 13 is a cross-sectional view of another orientation of a center tube provided in accordance with an embodiment of the present application.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the description of the present application, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in 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 therefore not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, references to the description of the terms "an aspect," "some aspects," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.

Arrows in fig. 5 and 6 indicate flow paths of water.

As shown in fig. 1 to 6, an embodiment of the present application provides a filter core assembly with nested filter screens, which includes a housing 1, a filter screen 2 and a first filtering unit 3, wherein the first filtering unit 3 is disposed in the housing 1, the filter screen 2 is disposed in the first filtering unit 3 in a nested manner, and the filter screen 2 is located upstream of the first filtering unit 3 along a flow direction of a water path in the filter core assembly. The filter screen 2 is used for filtering large-particle substances such as silt, rust and the like in raw water and plays a role in primary coarse filtration; by arranging the filter screen 2 at the upstream of the first filter unit 3, raw water with poor water quality can be coarsely filtered through the filter screen 2 and then filtered through the first filter unit 3, so that the water quality of water flow flowing into the first filter unit 3 is relatively uniform, the first filter unit 3 is protected, the service life of the first filter unit 3 is prolonged, and the user experience is better; but also can enlarge the range of the raw water quality allowable by the filter element component, has wider applicable area and stronger practicability, and is beneficial to the large-scale popularization and application of water purification products. The filter screen 2 and the first filter unit 3 are integrally installed in the shell 1 to form the composite filter element, so that the water leakage hidden danger at the joint of each part is eliminated, the installation is compact, the structure is simple, the volume of the filter element assembly is greatly reduced, the overall volume of a water purification product is greatly reduced, the installation space is saved, the occupied kitchen space is reduced, and the requirements of users on high-quality and high-quality life are met; the defects of different filter element replacement periods and troublesome replacement and maintenance are overcome, the filter element replacement times are reduced, the use and maintenance cost of a water purification product is reduced, the use cost of a user is reduced, and the user experience is effectively improved; the filter element group complete machine only has a filter core, and the outward appearance is pleasing to the eye, and resources are saved reduces filter element group spare manufacturing cost, increases filter core collocation mode, and the dismouting is changed and is maintained simple convenient and fast, labour saving and time saving, and assembly efficiency is high, satisfies user demand, and user experience is better. The filter screen 2 is embedded in the first filter unit 3, so that the filter screen 2 is small in size, low in cost and simple in processing technology, the size of the filter element assembly is further reduced, and the installation space is saved; and can inject silt etc. that produce when coarse filtration in 3 inboards in first filter unit, it is more convenient when driving silt etc. convenience of customers is manual to be driven, and clean the maintenance is convenient, is favorable to prolonging filter element group spare life, and user experience is better.

In particular, the screen 2 may be a stainless steel mesh. The first filter unit 3 may include a plurality of different types of filter elements, such as a PP cotton (Polypropylene, PP cotton is made of Polypropylene fibers) filter element and a sintered carbon filter element (or a carbon fiber filter element), and may be used as a front-end filter element, which is mainly used for filtering large particulate matters such as silt and rust in water, and residual chlorine, organic matters, bacteria, and the like, and performs a second-stage filtering function. In this embodiment, first filter unit 3 is cotton carbon composite filter core or carbon fiber filter core, can realize the two-stage filtration, and the filter effect is better. The filter element assembly further comprises a second filter unit (not shown in the figure) arranged in the shell 1, and the second filter unit is positioned at the downstream of the first filter unit 3 along the flow direction of a water path in the filter element assembly; the second filtering unit plays a role of third-stage filtering. The filter screen 2, the first filter unit 3 and the second filter unit are integrally installed in the shell 1 to form the composite filter element, so that the water leakage hidden danger at the joint of each part is eliminated, the installation is compact, the structure is simple, the volume of the filter element assembly is greatly reduced, the whole volume of a water purification product is greatly reduced, the installation space is saved, the occupied kitchen space is reduced, and the requirements of users on high-quality and high-quality life are met; the defects of different filter element replacement periods and troublesome replacement and maintenance are overcome, the filter element replacement times are reduced, the use and maintenance cost of a water purification product is reduced, the use cost of a user is reduced, and the user experience is effectively improved; simultaneously, the filter element group spare complete machine only has a filter core, and the outward appearance is pleasing to the eye, and resources are saved reduces filter element group spare manufacturing cost, increases filter core collocation mode, and the dismouting is changed and is maintained simple convenient and fast, labour saving and time saving, and assembly efficiency is high, satisfies user demand, and user experience is better.

When the filter element assembly is used, the filter screen 2, the first filter unit 3 and the second filter unit are used for filtering step by step, and can be used for pretreating inlet water of a rear-end water purifier, so that the service life of a filter element of the rear-end water purifier can be protected and prolonged, and the use cost of the rear-end filter element is reduced; but also can realize the water purification of big flux, reduce use cost, effectively promote the user and use experience. The filter element group spare can regard as water purifier independent utility, also can regard as central water purification unit directly to arrange the trunk line of registering one's residence in, purifies the whole house water, can protect the whole house pipeline, does not influence user's flux requirement moreover, can be used in activities such as washing dish, cooking, and application range is unrestricted, satisfies the most water demand of ordinary family, and user experience is better.

In one embodiment, the second filter unit is a scale inhibition filter element, can effectively remove water alkali scale in water, plays a role in protecting other water treatment equipment connected to the downstream of the filter element assembly, and prolongs the service life of the water treatment equipment. For example, the scale inhibition filter element can effectively protect a reverse osmosis membrane or an ultrafiltration membrane of the water purifier, and prolong the service life of the reverse osmosis membrane and the ultrafiltration membrane; when using filter element group spare to supply water for the water heater, can prevent to appear the incrustation scale in the water heater, solve the water alkali incrustation scale problem among the user's water heater, avoid the water heater to use inside scale deposit after a period, extension water heater life.

In another embodiment, the second filtering unit is a bacteriostatic filter element, such as a KDF (copper alloy with high purity, which can remove heavy metal and acid radical ions in water and improve the activation degree of water) filter element, which can play roles of removing residual chlorine, inhibiting microorganism reproduction, reducing scaling, adsorbing heavy metal ions, and the like, effectively improving water quality, achieving a good water purification effect, protecting the health of a user, and improving user experience.

Specifically, the second filter unit is nested and is set up between filter screen 2 and first filter unit 3 for first filter unit 3, second filter unit and filter screen 2 realize multistage surrounding through annular stack and compound, form concentric circle formula structure, and mounting structure is compact, reduces the space and occupies, reduces the complete machine volume of filter element group spare, saves kitchen installation space, and user experience is better.

Specifically, as shown in fig. 2 to 9, the filter element assembly further includes an inner top cap 4 disposed between the inner end surface of the housing 1 and the first filter unit 3, wherein one end of the inner top cap 4 is hermetically connected to the inner end surface of the housing 1, and a raw water region 101 is enclosed between the inner end surface of the housing 1 and the inner end surface of the housing 4; the housing 1 is provided with a raw water port 11 communicating with the raw water zone 101, and the inside or outside of the screen 2 communicates with the raw water zone 101. The other end of the inner top cover 4 is fixedly and hermetically connected with the first filtering unit 3, plays a role in mounting and fixing the first filtering unit 3, is axially combined with the first filtering unit 3, and has the advantages of simple and compact structure, convenience and high efficiency in assembly, reduced volume of the filter element assembly, reduced space occupation and saved mounting space; simultaneously, inner roof 4 still plays the water route and distributes the effect, and the waterway structure obtains optimizing, has stopped the production of stagnant water, and make full use of filter screen 2 and first filter unit 3's filter area, filtration efficiency is high, and the water purification effect is better, and user experience is better.

Specifically, as shown in fig. 2 to 8 and 10, the filter element assembly further includes a water-stop sleeve 5 sleeved between the filter screen 2 and the first filter unit 3 and fixedly connected to the inner top cover 4, and a water inlet area 102 is defined by the inner top cover 4, the filter screen 2 and the water-stop sleeve 5; the water inlet region 102 is communicated with the raw water region 101, and the inner side of the filter screen 2 is communicated with the first filter unit 3. In this embodiment, filter screen 2's filtration direction is the inboard of the outside flow direction filter screen 2 by filter screen 2, and it is inboard that the raw water gets into filter screen 2 after filter screen 2 filters promptly, and filter screen 2 is inboard to enclose into the coarse filtration water district 103 of one-level, and filter screen 2 is inboard to be the filtration rear end of filter screen 2, and the coarse filtration water district 103 of one-level communicates with the filtration front end of first filter unit 3. Filter screen 2 adopts the filter orientation of outside-in, can inject silt etc. that produce when coarse filtration in the district 102 of intaking between the filter screen 2 outside and water proof cover 5, and is more convenient when cleaing away silt etc., and convenience of customers is manual to be clear away, and clean maintenance is convenient, and user experience is better.

Specifically, the shell 1 is also provided with a flushing port 12; the filter element assembly further comprises a flushing pipe 6 which is embedded in the filter screen 2, one end of the flushing pipe 6 is communicated with the flushing port 12, the other end of the flushing pipe is communicated with the water inlet area 102, and a flushing water area 104 is formed in the flushing pipe 6, so that a flushing waterway which sequentially flows through the original water port 11, the original water area 101, the water inlet area 102, the flushing water area 104 and the flushing port 12 is formed. Through setting up washing mouth 12, do not need dismouting filter screen 2 can realize washing filter screen 2's independence, extension filter screen 2 and filter element group spare life eliminate the risk of leaking that the pipeline dismouting brought, the filter element group spare realizes from the washing function, and the user uses convenient and fast more, maintains simple and conveniently, saves trouble laborsaving, reduces use cost, and the fully provided user's user demand promotes user and uses experience. Impurities intercepted by the filter screen 2 are deposited at the bottom of the water inlet area 102, separation of flushing water and primary coarse filtering water generated after filtering of the filter screen 2 is realized through the flushing pipe 6 which is embedded in the filter screen 2, raw water flows to the flushing water area 104 through the water inlet area 102 and then is discharged from the flushing port 12, the filter screen 2 is flushed by the water flow in a lateral flow manner, the water flow is from top to bottom and then from bottom to top, the flow channel is short, the flushing force is large, and siphon force is formed, so that the flushing effect on the filter screen 2 is optimal; and wash the structure in water route and obtain optimizing, stop the production of stagnant water, prevent effectively that the sparge water from remaining, the structure is compacter, and the whole volume of filter element group spare is littleer, saves kitchen installation space, and user experience is better.

The shell 1 is further provided with a water purifying port 13, so that a water purifying waterway which sequentially flows through the raw water port 11, the raw water area 101, the water inlet area 102, the filter screen 2, the primary coarse filtering water area 103, the first filtering unit 3, the second filtering unit and the water purifying port 13 is formed. The filter element assembly of the present application is capable of being switched between a flushing state and a use state. In the use state, as shown in fig. 5, the water purification port 13 is opened, the flushing port 12 is closed, and the filter screen 2 is communicated with the water purification waterway; raw water enters a raw water area 101 in the filter element assembly from a raw water port 11, flows along the inner top cover 4, reaches a water inlet area 102 outside the filter screen 2, is filtered by the filter screen 2 to generate primary coarse filtering water, and flows out to a primary coarse filtering water area 103 and further reaches the filtering front end of the first filtering unit 3; the first-stage coarse filtered water is filtered by the first filtering unit 3 to generate second-stage filtered water, and the second-stage filtered water is filtered by the second filtering unit and finally flows out from the water purifying port 13 to realize filtering. In the flushing state, as shown in fig. 6, the water purifying port 13 is closed, the flushing port 12 is opened, and the filter screen 2 is communicated with the flushing waterway; raw water enters the raw water area 101 in the filter element assembly from the raw water port 11 and flows along the inner top cover 4 to reach the water inlet area 102 outside the filter screen 2, water flow can not flow to the filtering rear end (namely, the inner side) of the filter screen 2 but scours the filtering front end (namely, the outer side) of the filter screen 2, large particle impurities such as dust, silt and the like deposited at the filtering front end of the filter screen 2 are scoured out to the flushing water area 104, and finally the filter element assembly is discharged from the flushing port 12, so that the filter screen 2 is flushed. The water purification water route with wash the water route mutually independent, guarantee the water purification water route and wash the isolation in water route, effectively prevent that the sparge water through filter screen 2 from flowing into the water purification water route, avoid the pollution of sparge water to the water purification water route, play the biggest guard action to first filter unit 3 and second filter unit, guarantee the filtration water purification effect of filter element group spare, greatly prolong the life of filter element group spare, reduce user use cost, promote user's use and experience. In a specific embodiment, the flushing is electrically controlled, the electrical control of the whole machine can set the flushing time for controlling the flushing electromagnetic valve, or the flushing can be automatically carried out after the water is filtered by counting through a flowmeter, the user does not need to manually flush, and the user experience is better.

Specifically, as shown in fig. 2 to 8 and 11 to 13, the first filter unit 3 is in a hollow cylindrical shape coaxial with the housing 1, and the filtering direction of the first filter unit 3 is along the radial direction of the first filter unit 3; in this embodiment, the filtration front end of first filter unit 3 is first filter unit 3's lateral wall, and first filter unit 3 has bigger filter area, can realize big flux water purification, satisfies user demand. The filter element assembly further comprises a central tube 7 which is sleeved inside the first filter unit 3, a first flow channel 71 is arranged in the central tube 7, and one end of the first flow channel 71 is connected with the filtering rear end of the filter screen 2, and the other end of the first flow channel is connected with the filtering front end of the first filter unit 3. The upper part of the central tube 7 is provided with a filter screen mounting part 72, the circumferential surface of the filter screen mounting part 72 is provided with a plurality of water passing openings 73, the filter screen 2 is sleeved on the filter screen mounting part 72, the water passing openings 73 are communicated with a water inlet area 102 on the outer side of the filter screen 2 and a first flow channel 71 on the inner side of the central tube 7, the first flow channel 71 is a primary coarse filtering water area 103, and a purified water path at the moment sequentially flows through the raw water opening 11, the raw water area 101, the water inlet area 102, the filter screen 2, the first flow channel 71, the first filtering unit 3, the second filtering unit and. The central tube 7 plays a role in fixing and supporting the filter screen 2, so that the filter screen 2 is prevented from being washed, extruded and deformed by water flow, and the strength and the filtering effect of the filter screen 2 are ensured; the central tube 7 also plays a role in water path distribution, the water path structure is optimized, the production of dead water is avoided, the filter area of the filter screen 2 and the first filter unit 3 is fully utilized, the filter efficiency is high, the water purification effect is better, the structure is simple and compact, the volume of the filter element assembly is reduced, the space is reduced, the installation space is saved, the assembly is convenient and efficient, the disassembly and assembly are convenient to maintain, and the user experience is better.

The filter screen installation portion 72 butt plays the effect of sealed filter screen 2 tip in the inner peripheral face of filter screen 2, and simple structure is reasonable, and is fixed firm reliable, and sealed effect is better, prevents effectively that the raw water from walking around filter screen 2 tip and getting into first flow channel 71, avoids appearing raw water and the thick crossing water of one-level filtration, overflow phenomenon, effectively guarantees filter screen 2 filter effect.

The outer side wall of the central tube 7 is also provided with an annular connecting part 74 positioned below the filter screen mounting part 72, the water-stop sleeve 5 is sleeved outside the filter screen mounting part 72 of the central tube 7, one end of the water-stop sleeve is fixedly and hermetically connected with the inner top cover 4, the other end of the water-stop sleeve is fixedly and hermetically connected with the annular connecting part 74, and a water inlet area 102 is defined by the inner top cover 4, the water-stop sleeve 5, the filter screen 2, the filter screen mounting part 72 and the; a secondary water filtering area 105 is defined by the inner side of the first filtering unit 3, the outer side wall of the central pipe 7 below the annular connecting part 74, the outer side wall of the water-resisting sleeve 5 and the inner top cover 4.

Specifically, an inner pipe 75 is further disposed in the central pipe 7, the inner pipe 75 has a second flow channel 76 therein, the central pipe 7 further has a diversion channel 77 communicating the water inlet region 102 with the second flow channel 76, and the central pipe 7 alternatively conducts the first flow channel 71 or the second flow channel 76. In this embodiment, the inner tube 75 is the flushing tube 6, the second flow passage 76 is the flushing water region 104, and the second flow passage 76 is communicated with the flushing port 12. The filter element assembly can be switched between a flushing state and a using state; in the flushing state, the water inlet region 102 is communicated with the second flow passage 76; in the use state, the water inlet region 102 is communicated with the first flow channel 71. In a specific implementation, inner tube 75, reposition of redundant personnel passageway 77 and center tube 7 integrated into one piece have higher intensity, and life is longer, assembles convenient efficient, and the dismouting is maintained conveniently, and user experience is better.

Specifically, as shown in fig. 2 to 10, the filter element assembly further includes an inner base 8, and an overflow channel 106 is formed between the inner base 8 and the housing 1 to communicate the filtering rear end (i.e., the primary coarse filtering water area 103) of the filter screen 2 with the filtering front end of the first filtering unit 3. The inner top cover 4 and the inner wall of the shell 1 form a water purification area 107 below the raw water area 101, the water purification area 107 is communicated with the water purification port 13, and the filtering rear end (i.e. the secondary filtering water area 105) of the first filtering unit 3 is communicated with the water purification area 107. The two ends of the first filtering unit 3, which are perpendicular to the filtering direction, are fixedly and hermetically connected with the inner top cover 4 and the inner base 8 respectively, so that the two ends of the first filtering unit 3 are fixedly and hermetically sealed respectively, the structure is simple and reasonable, the fixing firmness and the reliability are high, the sealing effect is better, primary coarse filtered water is prevented from entering the secondary filtering water area 105 by bypassing the end part of the first filtering unit 3, water mixing and water overflowing are effectively prevented, the primary coarse filtered water is ensured to pass through the first filtering unit 3 along the filtering direction, and the filtering effect of the first filtering unit 3 is effectively ensured; and the inner top cover 4 simultaneously forms the former water district 101 and the water purification district 107, and the structure is succinct compact, and processing is simple with low costs, reduces the axial dimensions of filter element group spare greatly, saves installation space, and assembly is simple convenient and fast, and assembly efficiency is high, and the dismouting is maintained conveniently, and user experience is better. In one embodiment, the inner top cover 4 comprises a raw water connection part 41 connected with the inner end surface of the shell 1 in a sealing manner and a water purification connection part 42 connected with the inner side wall of the shell 1 in a sealing manner, and a water purification area 107 is enclosed among the raw water connection part 41, the water purification connection part 42 and the inner wall of the shell 1.

Specifically, a boss 81 is provided in the middle of the inner base 8, and a water passage 82 communicating with the flow passage 106 is provided on the boss 81; the bottom of the central tube 7 is fixedly and hermetically connected with the boss 81 of the inner base 8, and the water through port 82 is communicated with the first flow passage 71 in the central tube 7. The inner base 8 is folded towards one side of the boss 81 to form a flange 83, and the side wall of the first filter unit 3 is located between the boss 81 and the flange 83. Boss 81 and turn-ups portion 83 have increased the sealing connection area of interior base 8 and first filter element 3 tip, connect more firmly reliably, and sealed effect is better, further prevents overflow, the phenomenon of crossing water, the reliability is high, guarantees first filter element 3's filter effect, and user experience is better.

Specifically, the outer side wall of the water-proof sleeve 5 is also provided with an annular rib 51, and the annular rib 51 is provided with an overflowing hole 52; the inner top cover 4 is further provided with a sleeve part 43 extending along the axial direction, the sleeve part 43 is sleeved on the outer side of the water-proof sleeve 5 and is fixedly and hermetically connected with the annular convex rib 51, so that an accommodating cavity 108 is defined among the outer side wall of the water-proof sleeve 5, the annular convex rib 51 and the sleeve part 43, the second filtering unit comprises a scale inhibiting material or a KDF antibacterial material which is filled and fully compressed in the accommodating cavity 108, and the service lives of the scale inhibiting material and the KDF antibacterial material are effectively prolonged. The accommodating chamber 108 is communicated with the secondary filtering water area 105 through the overflowing hole 52, and the communicating hole 44 for communicating the water purifying area 106 with the accommodating chamber 108 is further formed in the inner top cover 4, so that the water filtered by the first filtering unit 3 is ensured to be fully contacted with the second filtering unit, the filtering area of the second filtering unit is fully utilized, the filtering efficiency is higher, the filtering effect is better, and the user experience is better; the non-woven fabrics are welded at the positions of the overflowing holes 52 and the communicating holes 44 through ultrasonic waves, so that the scale inhibiting materials or KDF bacteriostatic materials are prevented from leaking.

Specifically, the filter element group spare is still including the cover locate the inside filter core sleeve 9 of first filter unit 3, plays the fixed stay effect to first filter unit 3 and center tube 7 simultaneously, makes the interval distance of first filter unit 3 and center tube 7 even, and rivers are more stable, the first filter unit 3 of make full use of and filter screen 2's filter area, and filtration efficiency is high, and the filter effect is better. In the present embodiment, when the filter element assembly is assembled, the filter 2 is sleeved on the filter mounting portion 72 of the central tube 7; the water isolation sleeve 5 is sleeved outside the filter screen mounting part 72 of the central tube 7, and one end of the water isolation sleeve is fixedly and hermetically connected with the annular connecting part 74; the sleeve part 43 of the inner top cover 4 is sleeved outside the water-resisting sleeve 5 and fixedly and hermetically connected with the annular convex rib 51, and the inner top cover 4 is also fixedly and hermetically connected with the other end of the water-resisting sleeve 5 and one end of the central pipe 7; one end of the filter element sleeve 9 is sleeved outside the sleeve part 43 of the inner top cover 4, the other end of the filter element sleeve is fixedly and hermetically connected with the inner base 8, and the inner base 8 is also fixedly and hermetically connected with the other end of the central tube 7, so that a combined assembly body 100 is formed; first filter unit 3, second filter unit and filter screen 2 integrated mounting are on built-up fitting body 100, then assemble casing 1 together again in, the succinct compactness of structure, and processing is simple with low costs, reduces the volume of filter element group spare greatly, saves installation space, assembles simple convenient and fast, and assembly efficiency is high, and the dismouting is maintained conveniently, and user experience is better.

In a specific embodiment, as shown in fig. 1 to 6, the housing 1 includes a filter flask 14 and a filter flask cover 15, the filter flask 14 is a hollow cavity with an open end, the filter flask cover 15 and the filter flask 14 are fixedly connected by screwing and melting and seal the open end, the structure is simple, and the assembly and disassembly are convenient and fast. Former mouth of a river 11, wash mouthful 12 and water purification mouth 13 and all adopt the inserted bar formula structure, and the filter element group spare adopts bayonet joint structure with the water route interface of water route board, and the disconnect-type helicitic texture or the spiral joint that are different from traditional filter core, and it is convenient that the filter element group spare trades the core, labour saving and time saving, and the dismouting is maintained conveniently. The original water gap 11, the flushing port 12 and the water purifying port 13 are all arranged on the filter flask cover 15, a plurality of annular connecting ribs 151 which are arranged in a nested manner are arranged on the inner end face of the filter flask cover 15, and the flushing pipe 6 and the inner top cover 4 are respectively in sealing connection with the side faces of the annular connecting ribs 151, so that sealing structures are all arranged at one end of the shell 1 and are sealed in pairs, the sealing effect is better, water mixing and overflowing are effectively prevented, the water leakage risk is low, the filtering and flushing effects of the filter element assembly are ensured, and the service life of the filter element assembly is prolonged; and the size chain is good to the degree of control, and the structure is compacter, and the whole volume of filter element group spare is littleer, saves kitchen installation space, and user experience is better.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A screen nested filter element assembly, comprising:

a housing;

a first filter unit disposed within the housing; and

the embedded device is arranged on a filter screen in the first filtering unit and along the water path flowing direction in the filter element assembly, and the filter screen is positioned at the upstream of the first filtering unit.

2. The filter element assembly according to claim 1,

the filter element assembly further comprises an inner top cover arranged between the inner end face of the shell and the first filtering unit, and the inner top cover is connected with the inner end face of the shell in a sealing mode and forms a raw water area with the inner end face of the shell in a surrounding mode;

the shell is provided with a raw water port communicated with the raw water area, and the inner side or the outer side of the filter screen is communicated with the raw water area.

3. The filter element assembly according to claim 2,

the filter element assembly further comprises a water-resisting sleeve which is sleeved between the filter screen and the first filter unit and is fixedly connected with the inner top cover, and a water inlet area is defined by the inner top cover, the filter screen and the water-resisting sleeve;

the water inlet area is communicated with the raw water area, and the inner side of the filter screen is communicated with the first filter unit.

4. The filter element assembly according to claim 3,

the shell is also provided with a flushing port;

the filter element assembly further comprises a flushing pipe which is embedded in the filter screen, one end of the flushing pipe is communicated with the flushing port, and the other end of the flushing pipe is communicated with the water inlet area.

5. The filter element assembly according to claim 3,

the filter element assembly further comprises a central pipe which is arranged inside the first filter unit in a sleeved mode, a first flow channel is arranged in the central pipe, one end of the first flow channel is connected with the filtering rear end of the filter screen, and the other end of the first flow channel is connected with the filtering front end of the first filter unit.

6. The filter element assembly according to claim 5,

the central pipe is internally provided with an inner pipe, a second flow channel is arranged in the inner pipe, the central pipe is also provided with a flow dividing channel for communicating the water inlet area with the second flow channel, and the central pipe selects one flow to conduct the first flow channel or the second flow channel.

7. The filter element assembly according to any one of claims 1 to 6,

the filter element assembly also comprises a second filtering unit arranged in the shell, and the second filtering unit is positioned at the downstream of the first filtering unit along the flow direction of a water path in the filter element assembly;

the second filtering unit is a scale inhibition filter element or a bacteriostatic filter element.

8. The filter element assembly according to claim 7,

the second filtering unit is embedded between the filter screen and the first filtering unit.

9. The filter element assembly according to any one of claims 2 to 6,

still include interior base, interior base with form the intercommunication between the casing the filtration rear end of filter screen with the passageway that overflows of the filtration front end of first filter unit, interior top cap with the inner wall of casing forms and is located the water purification district of former water zone below, the filtration rear end intercommunication of first filter unit the water purification district.

10. The filter element assembly according to claim 9,

the middle part of the inner base is provided with a boss, the boss is provided with a water through port communicated with the overflowing channel, the periphery of the inner base is turned towards one side of the boss to form a flanging part, and the side wall of the first filtering unit is located between the boss and the flanging part.

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