CN215712168U - Filter element assembly and water purifier - Google Patents

Abstract

The application discloses filter element group spare and purifier, filter element group spare includes: the device comprises a shell, a water tank, a water pump and a control circuit, wherein the shell is provided with a raw water inlet, a purified water outlet and a waste water outlet; the reverse osmosis filter unit comprises a central pipe and a reverse osmosis membrane arranged around the central pipe, and the central pipe is provided with a purified water discharge port; the water separating cylinder is coaxially arranged with the reverse osmosis filtering unit and is provided with a purified water cavity and a water passing cavity positioned in the purified water cavity, the purified water cavity is communicated with the purified water outlet, a flow dividing part is arranged in the water passing cavity, and the flow dividing part is provided with a wastewater flow channel communicated with the wastewater outlet and a purified water flow channel used for communicating the purified water outlet with the purified water cavity; the purifier includes the filter core seat and installs in the filter core subassembly as above of filter core seat. The utility model provides a filter element group spare can improve the quality of water of the water purification export water purification and reduce the damage to reverse osmosis membrane when flowing backward and taking place.

Description

Filter element assembly and water purifier

Technical Field

The application relates to the technical field of water treatment, concretely relates to filter element group spare and purifier.

Background

With the attention of people on the health of drinking water, water purifying equipment begins to go to thousands of households. The core component of water purification unit is membrane filter core such as reverse osmosis membrane, receive filter membrane, if current water purification unit is equipped with the center tube in reverse osmosis membrane inboard, raw water can produce water purification and waste water under reverse osmosis membrane work, for realizing the quick discharge of water purification and waste water, current water purification unit has the water purification export just right with the center tube position and around the waste water export in the water purification export outside, water purification permeable reverse osmosis membrane flows in the center tube and finally flows from the water purification export just right with the center tube, waste water then flows from the waste water export that is located the water purification export outside.

The above-described solution of purified water directly exiting the central tube may present the following problems: because the central tube is over against the purified water outlet, the purified water flow path between the water outlet of the central tube and the purified water outlet is very short, when water receiving is stopped, the amount of purified water remained between the water outlet of the central tube and the purified water outlet is very small, and in the standby time after the water purifying equipment is shut down, part of impurities in raw water can gradually permeate into the central tube through the reverse osmosis membrane, so that when the central tube is restarted after shutdown (particularly after long-time shutdown), the TDS (total dissolved solids) value of the received first cup of water is higher, and the water quality cannot meet the filtering requirement; when the water purification equipment stops working and flows backward instantly, the water purification flow path between the water outlet of the central tube and the water purification outlet is short, the water is directly poured into the central tube, and the impact on the reverse osmosis membrane is increased due to the fact that the instantaneous water pressure is large, and the service life of the reverse osmosis membrane is shortened.

SUMMERY OF THE UTILITY MODEL

The present application provides a filter element assembly to address at least one of the above technical problems.

The technical scheme adopted by the application is as follows:

a filter element assembly, comprising: the device comprises a shell, a water tank, a water pump and a water pump, wherein the shell is provided with a raw water inlet, a purified water outlet and a wastewater outlet, and the wastewater outlet is positioned at the inner side of the purified water outlet; the reverse osmosis filter unit comprises a central pipe and a reverse osmosis membrane arranged around the central pipe, and the central pipe is provided with a purified water discharge port; the water diversion cylinder, the water diversion cylinder with reverse osmosis filter unit coaxial arrangement, the water diversion cylinder is equipped with the water purification chamber and is located the water cavity of crossing in the water purification chamber, the water purification chamber with water purification export intercommunication, cross the intracavity and be equipped with the reposition of redundant personnel portion, the reposition of redundant personnel portion be equipped with the waste water runner of waste water export intercommunication and be used for the intercommunication the water purification discharge port with the water purification runner of water purification chamber.

The filter element assembly in the present application also has the following additional technical features:

one of the purified water discharge port and the purified water flow passage is provided with a check valve, and the check valve is configured to be communicated with the purified water flow passage in a one-way manner from the purified water discharge port.

The check valve comprises at least two elastic valve plates, the two adjacent elastic valve plates can be matched to form a communicating mode between the purified water discharge port and the purified water flow channel, the elastic valve plates are opened under the pressure action of purified water in the central pipe to form an overflowing gap, and the elastic valve plates reset under the elastic action of the elastic valve plates to seal the overflowing gap.

The water diversion cylinder comprises an inner sleeve and an outer sleeve which are connected, the water passing cavity is formed inside the inner sleeve, the water purifying cavity is formed between the inner sleeve and the outer sleeve, and partial area of the reverse osmosis filtering unit extends into the inner sleeve along the axial direction of the water diversion cylinder; the reposition of redundant personnel portion be equipped with along the axially extended position sleeve of a water knockout drum and around the reposition of redundant personnel fin that the position sleeve was arranged, the position sleeve with the center tube is coaxial to be arranged, and the cooperation forms between two adjacent reposition of redundant personnel fins the waste water runner, at least one the inside of reposition of redundant personnel fin is equipped with the water purification runner, the water inlet of water purification runner set up in the one end of position sleeve.

The center tube includes the water collecting section and is equipped with the play water section of water purification discharge port, go out the at least part region of water section certainly the other end of position sleeve stretches into in the position sleeve, go out the water section with the sealed cooperation of position sleeve, the delivery port of water purification runner is located shunting fin's end, the position height of water purification discharge port is higher than the position height of the bottom face of delivery port, the lower part orientation of water purification chamber deviates from the direction of water purification export extends so that the bottom in water purification chamber is less than the delivery port.

The filter element assembly is characterized by further comprising a rear-mounted filtering unit arranged in the water purifying cavity, and the water distribution cylinder is provided with a radial limiting part used for limiting the rear-mounted filtering unit in the radial direction and an axial limiting part used for limiting the rear-mounted filtering unit in the axial direction.

The filter element assembly is characterized by further comprising a waste water cylinder cover and a water purifying cylinder cover, wherein the waste water cylinder cover is provided with the waste water outlet, the water purifying cylinder cover is provided with the water purifying outlet, the waste water cylinder cover and the water purifying cylinder cover are respectively in sealing fit with the water dividing cylinder, the waste water cylinder cover and the water purifying cylinder cover are matched to form a drainage section communicated with the water purifying cavity, the waste water cylinder cover is provided with a water outlet end and a positioning end fixedly connected with the water dividing cylinder, the positioning end is provided with a diversion end face facing the water purifying outlet, and the diversion end face is provided with a plurality of reinforcing ribs.

The filter element assembly further comprises a front-mounted filtering unit, the reverse osmosis filtering unit is positioned on the radial inner side of the front-mounted filtering unit, and the front-mounted filtering unit and the water distribution cylinder are sequentially arranged along the axial direction of the shell; the front-mounted filter unit comprises a front-mounted filter element and a support tube used for supporting the front-mounted filter element, and one end of the support tube is in sealing fit with the water dividing cylinder to seal the water purifying cavity.

One of the supporting tube and the water distribution cylinder is provided with a stopping part, and the other of the supporting tube and the water distribution cylinder is provided with a matching part, wherein the stopping part is matched with the matching part in a stopping way so as to limit the axial movement of the water distribution cylinder in the shell.

Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:

1. the utility model provides a filter element group spare, the inboard that the waste water export is located the water purification export makes the water purification discharge port of center tube and the water purification export of shell form the dislocation on the radial direction along the shell, has prolonged the flow path of water purification, and the water purification flow path extension makes even take place to flow backward, thereby also can increase the flow path of the water of pouring and increase its resistance loss along the journey, has reduced the impact force of the water of pouring to the impact damage of the water of pouring to reverse osmosis membrane has been reduced.

And, the water purification discharge port of center tube and the water purification export of shell form the dislocation in the radial direction along the shell and make the water purification chamber compare in prior art with the center tube just to the scheme of water purification export, the volume in water purification chamber can the dilatation, not only can increase the flow path of water purification between water purification discharge port and water purification export, can also increase the persistence of water purification, when taking place to flow backward, the water purification chamber can provide the persistence space for the water purification, help improving water purification equipment shut down after a period, the problem that the first cup of water TDS value that the restart leads to is higher to and reduce the impact force of pouring water, thereby reduce the damage to reverse osmosis membrane, prolong its life.

In addition, set up the waste water export in the inboard, can realize that waste water concentrates and discharges to and when washing filter element group spare, wash the pressure of intaking and increase in the twinkling of an eye, the waste water export is built-in makes it compare in setting up its internal diameter in the outside and diminishes, under the mode of washing, waste water goes out the water velocity of flow and increases very fast, is favorable to dashing out more dirty of reverse osmosis membrane.

2. In a preferred embodiment of the present invention, a check valve is provided in one of the purified water discharge port and the purified water flow passage, and the check valve is configured to be communicated in one direction from the purified water discharge port to the purified water flow passage, thereby preventing the purified water from flowing backward and damaging the separation layer structure of the reverse osmosis membrane.

As the preferred embodiment under this embodiment, the check valve includes two at least elastic valve plates, and two adjacent elastic valve plates can cooperate and form the clearance that overflows that communicates water purification discharge port and water purification runner, and the elastic valve plate opens the clearance that overflows under the pressure effect of the water purification of center tube to reset in order to seal the clearance that overflows under self elastic action, so just can realize one-way conduction through simple elastic valve plate, and existing reduce cost is favorable to, can also simplify check valve structural design, is favorable to the miniaturization of filter element group spare.

3. As a preferred embodiment of the present application, the water diversion cylinder includes an inner sleeve and an outer sleeve connected to form a purified water chamber and a water passing chamber, the diversion part is provided with a positioning sleeve extending in the axial direction of the water diversion cylinder and diversion fins arranged around the positioning sleeve to form a purified water flow passage and a wastewater flow passage, so that by rationalizing the design of the diversion part, the diversion of purified water and wastewater can be realized only by one structural member of the diversion part, the structure is compact, and the miniaturization of the filter element assembly is facilitated; and the positioning sleeve is matched with the water purifying flow channel inside the shunting fin to realize that the center of the reverse osmosis filtering unit discharges purified water and then the shunting part drains the purified water from the center to the peripheral water purifying cavity, thereby realizing the side drainage of the purified water.

In addition, partial area of the reverse osmosis filtering unit extends into the inner sleeve along the axial direction of the water dividing cylinder, so that the axial size of the reverse osmosis filtering unit can be effectively prolonged, and the water quantity of reverse osmosis filtering in unit time is increased, and the water outlet quantity of purified water in unit time is increased.

As a preferred embodiment of the present embodiment, the water outlet of the water purification flow channel is disposed at the end of the flow dividing fin, the position of the water purification discharge port is higher than the position of the bottom end surface of the water outlet, and the lower portion of the water purification chamber extends in a direction away from the water purification outlet so that the bottom of the water purification chamber is lower than the water outlet.

4. As an optimal implementation mode of this application, through further setting up rearmounted filter unit in the water purification chamber, and the water knockout drum is equipped with and is used for carrying on spacing radial spacing portion and the spacing portion of axial to rearmounted filter unit, can guarantee that rearmounted filter unit does not rock, does not shift when taking place to flow backward to reduce its probability that receives the damage.

5. As a preferred embodiment of this application, be equipped with a plurality of strengthening ribs at the reposition of redundant personnel terminal surface of waste water barrel head, thereby the strengthening rib can disperse the backward flow water pressure and reduce the impact damage to rearmounted filter unit.

6. As a preferred embodiment of this application, the filter element group spare still includes leading filter unit, through the radial arrangement of reverse osmosis unit with leading filter unit, leading filter unit and the axial arrangement of water knockout drum, can optimize the mode of arrangement of filter element group spare, helps reducing axial and radial size, promotes the miniaturization of filter element group spare.

And the supporting tube of the front-mounted filtering unit is in sealing fit with the water purification cavity, so that raw water can be prevented from entering the water purification cavity through the fit clearance between the supporting tube and the water dividing cylinder to pollute purified water.

As a preferred embodiment under the embodiment, the supporting tube and the water distribution cylinder are matched with the stop part and the matching part through the stop part to limit the axial movement of the water distribution cylinder in the shell, so that the mounting position of the water distribution cylinder can be ensured, the sealing failure caused by the improper mounting is avoided, the damage to the front-mounted filtering unit caused by excessive mounting is avoided, and the sealing property of the water purification cavity is effectively ensured.

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 structural view of a filter element assembly according to an embodiment of the present application;

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

FIG. 3 is a cross-sectional view of a filter cartridge assembly according to one embodiment of the present application;

FIG. 4 is a schematic view of a check valve according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a water diversion drum according to an embodiment of the present application;

FIG. 6 is a first cross-sectional view of a knock out drum according to one embodiment of the present application;

FIG. 7 is a second cross-sectional view of the knock out drum in accordance with an embodiment of the present application;

FIG. 8 is a schematic structural view of an assembly of a knock out drum and a center tube according to an embodiment of the present application;

FIG. 9 is a cross-sectional view of a cartridge to center tube assembly according to one embodiment of the present application;

FIG. 10 is a schematic view of a waste water cartridge cover according to an embodiment of the present application;

FIG. 11 is a schematic structural view of an assembly of a water knockout drum and a pre-filter unit according to an embodiment of the present application;

FIG. 12 is a cross-sectional view of an assembled assembly of a knock out cartridge and a pre-filter unit according to one embodiment of the present application.

Reference numerals:

10 shell, 11 raw water inlet, 12 purified water outlet and 13 waste water outlet;

20 reverse osmosis filtration units, 21 central pipes, 22 reverse osmosis membranes, 210 purified water discharge ports, 23 water collection sections and 24 water outlet sections;

30 water dividing cylinders, 31 purified water cavities, 32 water passing cavities, 33 flow dividing parts, 330 waste water flow passages, 331 purified water flow passages, 34 one-way valves, 340 elastic valve plates, 341 flow dividing gaps, 301 inner sleeves, 302 outer sleeves, 332 positioning sleeves, 333 flow dividing fins, 3310 water inlets, 3311 water outlets, 3313 sub-purified water flow passages and 3020 annular bulges;

40 post-filter units, 41 radial limit parts, 42 axial limit parts, 410 horizontal parts and 411 resisting parts;

a waste water cylinder cover 50, a water purification cylinder cover 51, a water discharge section 52, a water outlet end 501, a positioning end 502, a flow dividing end surface 503, a reinforcing rib 5030 and a shell cover 53;

60 leading filter unit, 61 leading filter element, 62 supporting tube, 620 supporting body, 621 supporting platform, 622 extending part, 63 bottom end cover;

70 mounting the groove.

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 following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationship shown in the drawings for the purpose of convenience and simplicity of 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 considered limiting of the present invention.

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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 application. In this specification, the schematic representations of the terms used above are not necessarily intended to 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.

Referring to fig. 1-12, a filter element assembly is shown, comprising: the device comprises a shell 10, wherein the shell 10 is provided with a raw water inlet 11, a purified water outlet 12 and a waste water outlet 13, and the waste water outlet 13 is positioned on the inner side of the purified water outlet 12; a reverse osmosis filtration unit 20, the reverse osmosis filtration unit 20 comprising a central pipe 21 and a reverse osmosis membrane 22 arranged around the central pipe, the central pipe 21 being provided with a purified water discharge port 210; the water diversion cylinder 30, the water diversion cylinder 30 with the reverse osmosis filter unit 20 coaxial arrangement, the water diversion cylinder 30 is equipped with water purification chamber 31 and is located water passing chamber 32 in the water purification chamber, water purification chamber 31 with water purification export 12 intercommunication, be equipped with reposition of redundant personnel portion 33 in the water passing chamber 32, reposition of redundant personnel portion 33 be equipped with waste water runner 330 of waste water export 13 intercommunication and be used for the intercommunication water purification discharge port 210 with water purification runner 331 of water purification chamber 31.

The filter element assembly of the application, as shown in fig. 3, the waste water outlet 13 is located the inboard of water purification export 12 and makes the water purification discharge port 210 of center tube and the water purification export 12 of shell form the dislocation on the radial direction along shell 10, has prolonged the flow path of water purification, and the water purification flow path extension makes even take place to flow backward, thereby also can increase the flow path of the water of pouring and increase its resistance loss along the journey, has reduced the impact force of the water of pouring to reverse osmosis membrane 22's impact damage has been reduced to the water of pouring.

And, the water purification discharge port 210 of center tube and the water purification export 12 of shell form the dislocation along the radial direction of shell 10 and make water purification chamber 31 compare in prior art with the direct scheme as the water purification export of center tube, the volume of water purification chamber 31 can the dilatation, not only can increase the flow path of water purification between water purification discharge port 210 and water purification export 12, can also increase the persistence of water purification, when taking place to flow backward, water purification chamber 31 can provide the persistence space for the water purification, help improving the water purification equipment and shut down after a period of time, the problem that the head cup water TDS value that the restart leads to is higher, and reduce the impact force of pouring water, thereby reduce the damage to reverse osmosis membrane 22, prolong its life.

In addition, set up waste water outlet 13 in the inboard, can realize that waste water concentrates and discharges to and when washing the filter element subassembly, wash the pressure of intaking and increase in the twinkling of an eye, waste water outlet 13 is built-in makes it compare in setting up its internal diameter in the outside and diminishes, and under the mode of washing, waste water goes out the water velocity of flow and increases sooner, helps rinsing out reverse osmosis membrane 22's more filth.

It should be noted that the term "inside" in the present application, the position relation between the waste water outlet 13 and the clean water outlet 12 is used to indicate that the waste water outlet 13 is located inside the clean water outlet 12, and the term "inside" is to be understood in a broad sense, which means that the waste water outlet 13 is closer to the radial inside of the housing 10 than the clean water outlet 12 along the radial direction of the housing 10, however, the present application does not limit the position relation between the waste water outlet and the clean water outlet along the axial direction of the housing 10, for example, the water outlet end face of the waste water outlet is flush with the water outlet end face of the clean water outlet in one example, and the water outlet end face of the waste water outlet is located inside the clean water outlet in another example, and the water outlet end face of the waste water outlet is located outside the clean water outlet in another example.

When the filter element group spare of this application uses, raw water flows in the filter element group spare from raw water import 11 and reachs reverse osmosis unit 20, produces water purification and waste water after filtering, through dividing the reposition of redundant personnel portion 33 reposition of redundant personnel back in the water knockout drum 30, and water purification can flow in water purification chamber 31 along water purification runner 331, and waste water then flows to waste water outlet 13 through waste water runner 330 in order to flow out the filter element group spare. Wherein, the clean water continuously flows into the clean water cavity 31 until the clean water cavity 31 is filled with clean water, and then flows into the clean water outlet 12 to flow out of the filter element assembly. The water purification chamber 31 not only can satisfy and still provide sufficient drinking water demand for the user when water pressure is not enough, compares in prior art from still having enlarged water purification storage volume with the just right water outlet outflow of center tube position, thereby is favorable to improving the TDS value of the first time of water of going out and reducing the impact force of pouring water when restarting after shutting down for a long time and reduces the damage to reverse osmosis membrane 22.

In a water purification mode, the pressure of the raw water may be increased by a pressurizing pump, so that the water may be filtered by the reverse osmosis unit 20. Under the mode of washing, the booster pump is out of work, flows out from waste water outlet 13 after the water washing reverse osmosis membrane 22 that gets into, and under the mode of washing moreover, in the twinkling of an eye washing, pressure of intaking increases in the twinkling of an eye, because of the waste water outlet just to reverse osmosis filter unit 20, the internal diameter of waste water outlet is less for waste water exhaust velocity of flow is very fast, can realize washing away fast and promote the washing effect to the reverse osmosis membrane surface. So, the structure of the filter element group spare of this application not only can improve the quality of water purification play water and reduce the impact force of flowing backward, still conveniently washes core component reverse osmosis membrane 22 to thereby keep reverse osmosis membrane 22 clean further improve play water quality and prolong its life.

As a preferred embodiment of the present application, as shown in fig. 3, one of the purified water discharge port 210 and the purified water flow passage 331 is provided with a check valve 34, and the check valve 34 is configured to be communicated in one direction from the purified water discharge port 210 to the purified water flow passage 331. Thus, the separation layer structure of the reverse osmosis membrane can be prevented from being damaged by the reverse flow of the purified water through the check valve 34.

As a preferred embodiment in the present embodiment, as shown in fig. 4, the check valve 34 includes at least two elastic valve sheets 340, two adjacent elastic valve sheets 340 can cooperate to form a flow gap 341 communicating the purified water discharge port 210 and the purified water flow passage 331, and the elastic valve sheets 340 open the flow gap 341 under the pressure of the purified water in the central pipe 21 and reset under the elastic action of themselves to close the flow gap 341. So, just can realize one-way conduction through simple elastic valve piece, existing reduce cost that does benefit to can also simplify check valve structural design, is favorable to the miniaturization of filter element group spare.

Alternatively, the check valve 34 may be made of a material having an elastic restoring force, such as rubber, and may be disposed at a corresponding position of the purified water discharge port 210 or the purified water flow passage 331 by means of adhesion or ultrasonic welding, and the installation manner of the check valve 34 is not particularly limited in this application.

As a preferred embodiment of the present application, as shown in fig. 5 to 7, the diversion cylinder 30 includes an inner sleeve 301 and an outer sleeve 302 connected to each other, the water passing chamber 32 is formed inside the inner sleeve 301, the clear water chamber 31 is formed between the inner sleeve 301 and the outer sleeve 302, and a partial region of the reverse osmosis filtration unit 20 extends into the inner sleeve 301 in the axial direction of the diversion cylinder; the shunting part 33 is provided with a positioning sleeve 332 extending along the axial direction of the water dividing cylinder and shunting fins 333 surrounding the positioning sleeve 332, the positioning sleeve 332 and the central tube 21 are coaxially arranged, the two adjacent shunting fins 333 are matched to form the wastewater flow channel 330, at least one shunting fin 333 is provided with a water purification flow channel 331 inside, and a water inlet 3310 of the water purification flow channel 331 is arranged at one end of the positioning sleeve 332.

According to the water purifier, the design of the flow distribution part 33 is rationalized, and the flow distribution of purified water and waste water can be realized only through one structural component of the flow distribution part 33, so that the structure is compact, and the miniaturization of the filter element assembly is facilitated; and the purified water from the center of the reverse osmosis filtration unit 20 is drained to the peripheral purified water cavity 31 through the flow dividing part 33 after purified water is discharged from the center through the positioning sleeve 332 and the purified water flow channels in the flow dividing fins 333 by matching, so that the purified water is drained sideways.

In addition, a partial region of the reverse osmosis filtering unit 20 extends into the inner sleeve 301 along the axial direction of the water dividing cylinder 30, so that the axial size of the reverse osmosis filtering unit 20 can be effectively prolonged, and the amount of reverse osmosis filtered water in unit time is increased, and the purified water yield in unit time is increased.

As shown in fig. 6 or 7, in a specific embodiment, the ends of the inner sleeve 301 and the outer sleeve 302 far from the reverse osmosis filter unit 20 may be set to the same height dimension to facilitate assembly with the water outlet assembly, the inner sleeve 301 and the outer sleeve 302 are close to one end of the reverse osmosis filter unit 20, the bottom end position of the inner sleeve 301 is lower than the bottom end position of the outer sleeve 302, that is, the axial dimension of the inner sleeve 301 is larger than that of the outer sleeve 302, so that a partial region of the reverse osmosis filter unit 20 extends into the inner sleeve 301 and winding of the reverse osmosis membrane 22 around the central pipe 21 is facilitated. The radial dimension of the inner sleeve 301 may be larger than the radial dimension of the reverse osmosis membrane 22 to improve the utilization of the reverse osmosis membrane 22 in producing water. Reverse osmosis membrane 22 can adopt a roll structure, compares in current end cover stair structure, and the water efficiency of water purification can be reduced owing to receive the hindrance of end cover stair when the water is gone out from the outside to the water purification, and reverse osmosis membrane 22 adopts a roll structure can promote the water efficiency of water purification.

In the embodiment shown in fig. 6, 7 or 8, the positioning sleeve 332 is positioned at the radial center of the inner sleeve 301 to be installed coaxially with the central tube 21, and one side of at least one branching fin 333 is connected to the inner wall of the inner sleeve 301 to communicate the central tube 21 with the purified water chamber 31 through the purified water flow passage 331 inside the branching fin 333.

As a preferred example of this embodiment, as shown in fig. 6 and 9, the central tube 21 includes a water collecting section 23 and a water outlet section 24 provided with the purified water discharging port 210, at least a partial region of the water outlet section 24 extends into the positioning sleeve 332 from the other end of the positioning sleeve 332, the water outlet section 24 is in sealing fit with the positioning sleeve 332, the water outlet 3311 of the purified water flow passage 331 is provided at the end of the flow dividing fin 333, the purified water discharging port 210 is higher than the bottom end surface of the water outlet 3311, and the lower portion of the purified water chamber 31 extends in a direction away from the purified water outlet so that the bottom of the purified water chamber 31 is lower than the water outlet 3311.

Through the position height to center tube 21, delivery port 3311 and water purification chamber 31 injects, can make when taking place to flow backward, the water that flows backward gets into water purification chamber 31 earlier, and when the volume of the water that flows backward was greater than the volume of water purification chamber 31 bottom to delivery port 3311 department, the water that flows backward could flow into center tube 21 through the water purification runner, so can reduce the probability that the water that flows backward gets into center tube 21 in order to damage reverse osmosis membrane 22.

As a preferred embodiment of the present application, as shown in fig. 2 or fig. 3, the filter element assembly further includes a rear-mounted filter unit 40 disposed in the clean water cavity 31, and the water dividing cylinder 30 is provided with a radial limiting portion 41 for limiting the radial position of the rear-mounted filter unit 40 and an axial limiting portion 42 for limiting the axial position of the rear-mounted filter unit 40.

The post-filter unit 40 is used for removing volatile organic compounds, residual chlorine residue and the like, and reserving necessary mineral substances such as trace calcium, silicic acid, carbonate and the like, so that the taste of the purified water is sweet and soft. The post-filter unit 40 may preferably use activated carbon.

The rear filtering unit 40 is limited by the radial limiting part 41 and the axial limiting part 42 of the water distribution cylinder 30, so that the rear filtering unit 40 can be prevented from shaking and shifting when backflow occurs, and the probability of damage of the rear filtering unit is reduced.

In a specific embodiment, as shown in fig. 6 or 7, in the upper portion of the clean water chamber 31, the radial direction limiting portion 41 is configured as an annular boss surrounding the outer wall of the inner sleeve 301, the annular boss includes a horizontal portion 410 and a stopping portion 411 folded upwards along the edge of the horizontal portion 410, and the post-filter unit 40 may be configured to be adapted to the shape of the annular boss. Further, the axial dimension of the post-filter unit 40 may extend from the horizontal portion 410 to the top end of the inner sleeve 301 or the outer sleeve 302, and the axial limiting portion 42 may be configured to limit the post-filter unit 40 axially by using the cover and the horizontal portion 410 at the same time by further providing a cover on the top end of the inner sleeve 301 and/or the outer sleeve 302.

Further, a sub-purified water flow passage 3313 is provided between the annular boss and the outer sleeve 302, the purified water chamber 31 is divided into an upper portion and a lower portion according to the sub-purified water flow passage 3313, and after the lower portion of the purified water chamber 31 is filled with purified water, the purified water enters the upper portion of the purified water chamber 31 through the sub-purified water flow passage 3313, so that the purified water in the upper portion of the purified water chamber 31 flows out from the purified water outlet 12 after being filtered by the post-filter unit 40, thereby improving the taste of the purified water.

In other embodiments, the upper portion of the clean water chamber 31 has a slightly smaller radial dimension than the lower portion of the clean water chamber 31 to limit the post-filter unit 40 to a narrower space to reduce sloshing.

As a preferred embodiment of this application, as shown in fig. 2, fig. 3 and fig. 10, the filter element assembly further includes the waste water cover 50 of being equipped with the waste water export 13 and being equipped with the water purification cover 51 of water purification export 12, waste water cover 50 with water purification cover 51 respectively with the sealed cooperation of water diversion drum 30, waste water cover 50 with water purification cover 51 cooperation form with the drainage section 52 of water purification chamber 31 intercommunication, waste water cover 50 have go out water end 501 and with the location end 502 that water diversion drum linked firmly, location end 502 has the orientation the reposition of redundant personnel terminal surface 503 of water purification export, reposition of redundant personnel terminal surface 503 is equipped with a plurality of strengthening ribs 5030.

The waste water cylinder cover 50 and the water purification cylinder cover 51 are respectively matched with the water distribution cylinder 30 in a sealing way, so that the waste water and the purified water are prevented from being polluted with each other, and the water yield of the purified water is prevented from being reduced due to pollution or loss of the purified water. The diversion end face 503 of the waste water cylinder cover 50 is provided with a plurality of reinforcing ribs 5030, and the reinforcing ribs 5030 can disperse the pressure of the backflow water so as to reduce the impact damage to the post-filter unit 40.

In one embodiment, the water purifying cartridge cover 51 may also be provided with a reinforcing rib (not shown) to share the water pressure dispersion of the poured water. Preferably, the number of the reinforcing ribs of the waste water drum cover 50 is greater than that of the water purification drum cover 51, so that the waste water drum cover 50 located at the center when the water is poured backward mainly plays a role of dispersing the water flow.

In other embodiments, the waste water cylinder cover 50 is sealed with the inner side of the inner sleeve 301, and the clean water cylinder cover 51 is sealed with the outer side of the outer sleeve 302, so as to reduce the breakage of the post-filter unit 40 caused by the impact of shaking and the structure of the waste water cylinder cover 50 or the clean water cylinder cover 51.

In one embodiment, as shown in fig. 2 or 3, the filter element assembly further comprises a housing cover 53 provided with the raw water inlet 11, and the housing cover 53 is in sealing fit with the housing 10 to ensure that raw water entering the filter element assembly is free from contamination.

As a preferred embodiment of the present application, the purified water outlet 12 and the waste water outlet 13 are concentrically arranged to ensure that all parts of the post-filter unit 40 are uniformly pressed during reverse flow, thereby reducing the damage degree of the post-filter unit 40.

As a preferred embodiment of the present application, as shown in fig. 2, 3, 11 or 12, the filter element assembly further includes a pre-filter unit 60, the reverse osmosis filter unit 20 is located at a radial inner side of the pre-filter unit 60, and the pre-filter unit 60 and the water dividing cylinder 30 are sequentially arranged along an axial direction of the housing 10; the pre-filter unit 60 comprises a pre-filter element 61 and a support pipe 62 for supporting the pre-filter element, and one end of the support pipe 62 is in sealing fit with the water separation cylinder 30 to close the purified water cavity 31.

The pre-filter unit 60 is used for removing impurities such as rust and silt in raw water, adsorbing the heterochrosis, peculiar smell, residual chlorine and partial organic matters in water, ensuring the water quality entering the reverse osmosis filter unit 20 and prolonging the service life of the reverse osmosis membrane. The front filter element 61 may be a PAC filter element (PP cotton and activated carbon composite filter element), or may be composed of other filter elements having the same function. The filter element assembly is radially arranged through the reverse osmosis unit 20 and the front filtering unit 60, the front filtering unit 60 and the water distribution cylinder 30 are axially arranged, the arrangement mode of the filter element assembly can be optimized, the axial and radial sizes are reduced, and the miniaturization of the filter element assembly is promoted.

In addition, the support pipe 62 of the pre-filter unit is in sealing fit with the purified water cavity 31, so that raw water can be prevented from entering the purified water cavity 31 through the fit clearance between the support pipe 62 and the water dividing cylinder 30 to pollute the purified water.

The sealing engagement between the water dividing cylinder 30 and the support tube 62 is not limited in this application, and any one of the following manners may be adopted:

in these ways, as shown in fig. 12, the support tube 62 may include a support main body 620, a support base 621 surrounding the upper end of the support main body 620, and an extension 622 extending downward from the edge of the support base 621. Wherein the front filter element 61 is disposed in the cavity of the support main body 620, and the circumferential wall of the support main body 620 can be provided with through holes for allowing water filtered by the front filter element 61 to enter the reverse osmosis filtration unit 20 through the through holes. Further, the pre-filter unit may further include a bottom end cap 63 to fixedly support the bottoms of the pre-filter element 61 and the support pipe 62.

The first embodiment is as follows: the water dividing cylinder 30 is in radial sealing fit with the support pipe 62. In particular, a portion of the inner sleeve 301 extends inside the support body 620 and abuts against the inner wall of the support body 620, a first radial seal (not shown in the figures) may be provided between the inner sleeve 301 and the support body 620; simultaneously, the lower end of the outer sleeve 302 abuts the extension 622, and a second radial seal (not shown) may be provided between the outer sleeve 302 and the extension 622. Alternatively, the first radial seal and the second radial seal may employ seal rings. The sealing effect can be ensured by the radial compression between the water dividing cylinder 30 and the support tube 62 and the simultaneous sealing by the sealing ring.

Further, the mounting groove 70 may be selectively disposed at a corresponding position of the outer wall of the inner sleeve 301, the inner wall of the support main 620, the inner wall of the outer sleeve 302, or the outer wall of the extension 622 to receive the sealing ring.

Example two: the water dividing cylinder 30 is axially and hermetically matched with the supporting pipe 62. Specifically, a third sealing member (not shown) may be provided between the water distribution cylinder 30 and the support base 621 in the axial direction of the water distribution cylinder 30, and the sealing effect may be ensured by the axial pressing of the water distribution cylinder 30 and the support pipe 62 and the sealing by the third sealing member. The third seal may for example take the form of a gasket or the like.

Example three: the water dividing cylinder 30 and the support pipe 62 are in radial sealing and axial sealing fit. Specifically, referring to the first and second embodiments, the sealing effect of the water purifying chamber 31 can be enhanced by multi-directional sealing.

As a preferred embodiment under the present embodiment, one of the support tube 62 and the water diversion cartridge 30 is provided with a stopper, and the other of the support tube 62 and the water diversion cartridge is provided with a fitting portion, and the stopper cooperates with the fitting portion stopper to limit the axial movement of the water diversion cartridge in the housing.

By limiting the axial movement of the water distribution cylinder 30 in the housing 10, the installation position of the water distribution cylinder 30 can be ensured, the sealing failure caused by the improper installation can be avoided, the damage to the pre-filter unit 60 caused by excessive installation can be avoided, and the sealing performance of the water purification cavity 31 can be effectively ensured.

In one specific embodiment, as shown in fig. 9, one end of the outer sleeve 302 is provided with an annular protrusion 3020 along its inner wall, and the annular protrusion 3020 and the support base 621 of the support tube 62 can be used as a stop and a fitting portion to form a limit fit. In an alternative embodiment, the annular protrusion 3020 may be an annular platform to increase the area of the stop engagement between the support tables 621.

On the basis of the foregoing embodiment and example, the present application further provides a water purifier, which includes a filter element seat and a filter element assembly installed on the filter element seat.

The water purifier using the filter element assembly can achieve the same beneficial technical effects, and is not repeated herein.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

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. 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 filter element assembly, comprising:

the device comprises a shell, a water tank, a water pump and a water pump, wherein the shell is provided with a raw water inlet, a purified water outlet and a wastewater outlet, and the wastewater outlet is positioned at the inner side of the purified water outlet;

the reverse osmosis filter unit comprises a central pipe and a reverse osmosis membrane arranged around the central pipe, and the central pipe is provided with a purified water discharge port;

the water diversion cylinder, the water diversion cylinder with reverse osmosis filter unit coaxial arrangement, the water diversion cylinder is equipped with the water purification chamber and is located the water cavity of crossing in the water purification chamber, the water purification chamber with water purification export intercommunication, cross the intracavity and be equipped with the reposition of redundant personnel portion, the reposition of redundant personnel portion be equipped with the waste water runner of waste water export intercommunication and be used for the intercommunication the water purification discharge port with the water purification runner of water purification chamber.

2. The filter element assembly according to claim 1,

one of the purified water discharge port and the purified water flow passage is provided with a check valve, and the check valve is configured to be communicated with the purified water flow passage in a one-way manner from the purified water discharge port.

3. The filter element assembly according to claim 2,

the check valve comprises at least two elastic valve plates, the two adjacent elastic valve plates can be matched to form a communicating mode between the purified water discharge port and the purified water flow channel, the elastic valve plates are opened under the pressure action of purified water in the central pipe to form an overflowing gap, and the elastic valve plates reset under the elastic action of the elastic valve plates to seal the overflowing gap.

4. The filter element assembly according to claim 1,

the water diversion cylinder comprises an inner sleeve and an outer sleeve which are connected, the water passing cavity is formed inside the inner sleeve, the water purifying cavity is formed between the inner sleeve and the outer sleeve, and partial area of the reverse osmosis filtering unit extends into the inner sleeve along the axial direction of the water diversion cylinder;

the reposition of redundant personnel portion be equipped with along the axially extended position sleeve of a water knockout drum and around the reposition of redundant personnel fin that the position sleeve was arranged, the position sleeve with the center tube is coaxial to be arranged, and the cooperation forms between two adjacent reposition of redundant personnel fins the waste water runner, at least one the inside of reposition of redundant personnel fin is equipped with the water purification runner, the water inlet of water purification runner set up in the one end of position sleeve.

5. A filter element assembly according to claim 4,

the center tube includes the water collecting section and is equipped with the play water section of water purification discharge port, go out the at least part region of water section certainly the other end of position sleeve stretches into in the position sleeve, go out the water section with the sealed cooperation of position sleeve, the delivery port of water purification runner is located shunting fin's end, the position height of water purification discharge port is higher than the position height of the bottom face of delivery port, the lower part orientation of water purification chamber deviates from the direction of water purification export extends so that the bottom in water purification chamber is less than the delivery port.

6. The filter element assembly according to claim 1,

the filter element assembly is characterized by further comprising a rear-mounted filtering unit arranged in the water purifying cavity, and the water distribution cylinder is provided with a radial limiting part used for limiting the rear-mounted filtering unit in the radial direction and an axial limiting part used for limiting the rear-mounted filtering unit in the axial direction.

7. The filter element assembly according to claim 6,

the filter element assembly is characterized by further comprising a waste water cylinder cover and a water purifying cylinder cover, wherein the waste water cylinder cover is provided with the waste water outlet, the water purifying cylinder cover is provided with the water purifying outlet, the waste water cylinder cover and the water purifying cylinder cover are respectively in sealing fit with the water dividing cylinder, the waste water cylinder cover and the water purifying cylinder cover are matched to form a drainage section communicated with the water purifying cavity, the waste water cylinder cover is provided with a water outlet end and a positioning end fixedly connected with the water dividing cylinder, the positioning end is provided with a diversion end face facing the water purifying outlet, and the diversion end face is provided with a plurality of reinforcing ribs.

8. The filter element assembly according to claim 1,

the filter element assembly further comprises a front-mounted filtering unit, the reverse osmosis filtering unit is positioned on the radial inner side of the front-mounted filtering unit, and the front-mounted filtering unit and the water distribution cylinder are sequentially arranged along the axial direction of the shell;

the front-mounted filter unit comprises a front-mounted filter element and a support tube used for supporting the front-mounted filter element, and one end of the support tube is in sealing fit with the water dividing cylinder to seal the water purifying cavity.

9. The filter element assembly according to claim 8,

one of the supporting tube and the water distribution cylinder is provided with a stopping part, and the other of the supporting tube and the water distribution cylinder is provided with a matching part, wherein the stopping part is matched with the matching part in a stopping way so as to limit the axial movement of the water distribution cylinder in the shell.

10. A water purification machine comprising a filter cartridge holder and a filter cartridge assembly according to any one of claims 1 to 9 mounted to the filter cartridge holder.

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