CN214158802U - Filter element assembly and water purifier - Google Patents

Abstract

The utility model provides a filter element group spare and purifier. The filter element group spare is including straining the shell and holding the filter core in straining the shell, is provided with first filter core water inlet and second filter core water inlet on straining the shell, and filter element group spare is still including setting up the relief pressure valve on straining the shell, and the one end of first filter core water inlet communicates with the valve water inlet of outside intercommunication and the other end and relief pressure valve, and the one end of second filter core water inlet communicates with the valve delivery port intercommunication of relief pressure valve and the other end and the end of intaking of filter core, and the relief pressure valve is used for adjusting the water pressure of valve delivery port department. The filter element assembly of the utility model can effectively reduce the length of the pipeline and the number of pipeline joints by integrating the filter element and the pressure reducing valve, thereby leading the structural size of the water-requiring equipment (such as a water purifier) to be smaller so as to be suitable for narrow space; and the water leakage point is correspondingly reduced, and the water-requiring equipment (such as a water purifier) is safer and more reliable.

Description

Filter element assembly and water purifier

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a filter element group spare and purifier that has it.

Background

With the pursuit of quality of life by the public, the quality of drinking water is beginning to attract much attention. The water purifier is more and more popular because the purified water produced by the water purifier is fresher, more sanitary and safer.

The filter element is the core component of purifier. The filter element is subjected to a certain water pressure, for example, the water pressure of tap water, during operation. For high-rise residents, the filter element still needs to bear larger high-rise water hammer. For the reverse osmosis water purifier, the filter element also needs to bear the water pressure after the pressurization of the booster pump. If the filter element bears the water pressure for a long time, the filter element can leak water, and the use of a user is seriously influenced. In order to enable the filter element to be free from bearing the water pressure when the water purifier is in standby, the existing water purifier is provided with a water inlet pressure reducing valve.

However, the inlet relief valve is typically located on the line upstream of the filter element, which results in a long line and requires a line connection. Therefore, the structure of the water purifier is large, and water leakage points are increased.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems of the prior art, according to one aspect of the present invention, a filter element assembly is provided. The filter element group spare is including straining the shell and holding the filter core in straining the shell, is provided with first filter core water inlet and second filter core water inlet on straining the shell, and filter element group spare is still including setting up the relief pressure valve on straining the shell, and the one end of first filter core water inlet communicates with the valve water inlet of outside intercommunication and the other end and relief pressure valve, and the one end of second filter core water inlet communicates with the valve delivery port intercommunication of relief pressure valve and the other end and the end of intaking of filter core, and the relief pressure valve is used for adjusting the water pressure of valve delivery port department.

The filter element assembly of the utility model can effectively reduce the length of the pipeline and the number of pipeline joints by integrating the filter element and the pressure reducing valve, thereby leading the structural size of the water-requiring equipment (such as a water purifier) to be smaller so as to be suitable for narrow space; and the water leakage point is correspondingly reduced, and the water-requiring equipment (such as a water purifier) is safer and more reliable.

Illustratively, the pressure reducing valve includes: the valve comprises a valve shell, a water inlet cavity and a water outlet cavity are arranged in the valve shell, a valve water inlet is arranged on the water inlet cavity, a valve water outlet is arranged on the water outlet cavity, and the water inlet cavity is communicated with the water outlet cavity through a through hole; the flow regulating part is movably arranged in the valve shell and moves towards the through hole under the action of water pressure so as to reduce a gap between the flow regulating part and the side wall of the through hole; and a reset member for returning the flow rate adjustment member to an initial position. Therefore, water leakage of the filter element caused by high water pressure at the water inlet end can be avoided; and when the water pressure at the water inlet end is lower than the preset pressure threshold value, the pressure reduction effect is not realized, so that the normal work of the reverse osmosis filter element can not be influenced. In addition, the pressure reducing valve is simple in structure and low in production cost.

Illustratively, the pressure reducing valve further includes a pressure regulating member movably disposed in the water outlet chamber, the flow regulating member is connected to the pressure regulating member through the through hole, and the reset member includes a first elastic member connected between the pressure regulating member and the valve housing. If the water pressure of the water inlet cavity is smaller than the preset pressure threshold value of the pressure reducing valve, the water pressure in the water outlet cavity is also smaller, and the pressure regulating part is kept at the initial position. Therefore, the flow regulating piece can be ensured to return to the initial position when the water pressure of the water inlet cavity is low, so that the pressure reducing valve is more stable in performance and high in reliability.

Illustratively, the flow regulating member includes a tapered portion and a connecting portion, the tapered portion is disposed in the water inlet chamber, one end of the connecting portion is connected to the small-sized end of the tapered portion, and the other end of the connecting portion passes through the through hole to be connected to the pressure regulating member, and a gap between the flow regulating member and a sidewall of the through hole changes as the pressure regulating member moves. Like this, flow control spare's structure is succinct, low in production cost, and comparatively stable and gentle to the decompression regulatory action of filter core.

Illustratively, the valve housing includes a housing body and a cover body movably connected to the housing body, the inlet chamber is disposed on the housing body, the housing body and the cover body enclose to form an outlet chamber, the first elastic member is connected between the pressure regulating member and the cover body, and the filter housing exposes the cover body. By moving the cover, the distance between the housing and the cover can be adjusted, so that the preset pressure threshold of the pressure reducing valve can be changed. Therefore, the pressure reducing valve can be suitable for various filter elements and has a wider application range. Furthermore, the valve housing is provided as a component part, which facilitates assembly and maintenance of the various component parts inside the valve housing.

Illustratively, the cover is threadably connected to the housing. The threaded connection has the advantages of simple structure, reliable connection, convenient assembly and disassembly and the like, and is widely applied to mechanical structures.

Illustratively, the through-hole and the cover are disposed opposite to each other along a moving direction of the flow rate adjusting member, and the cover is movably coupled to the housing along the moving direction of the flow rate adjusting member. The structure of the pressure reducing valve is relatively simple and the manufacturing cost is low.

Illustratively, the reset member includes a second elastic member disposed in the water inlet chamber, and the second elastic member is connected to the flow regulating member. Through setting up the second elastic component, can make flow control spare the other end be connected to and strain the shell, flow control spare can be more reliable. The second elastic member can also return the flow rate adjusting member to its original position, thereby ensuring stable performance of the pressure reducing valve.

Illustratively, the direction of movement of the flow regulating member is parallel to the axial direction of the filter cartridge, and the valve inlet and the valve outlet extend in a lateral direction perpendicular to the axial direction. Therefore, the filter element component can be prevented from being overlarge in radial size and is exquisite and small.

Illustratively, the first cartridge inlet, the second cartridge inlet, and the pressure relief valve are disposed side-by-side along a lateral direction that is perpendicular to an axial direction of the cartridge. Can make full use of filter element group spare radial space like this to can shorten filter element group spare axial dimensions, filter element group spare is exquisite small and exquisite more.

Illustratively, a water stop valve is arranged in the water inlet of the first filter element. Through setting up the stagnant water valve, can ensure that filter element group spare dismantles the back, does not have water to flow in following first filter core inlet, avoids scurrying water between the water route and prevent the waste of water resource. And the arrangement of the water stop valve does not lead to the increase of the axial size of the filter element component.

According to another aspect of the utility model, a water purifier is provided. The purifier includes any kind of filter element group spare above-mentioned.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of a filter cartridge assembly according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the filter element assembly shown in FIG. 1;

FIG. 3A is a cross-sectional view of the filter cartridge assembly shown in FIG. 1;

FIG. 3B is an enlarged partial view of the filter element assembly shown in FIG. 3A;

FIG. 4 is a perspective view of the filter cartridge assembly shown in FIG. 3A;

FIG. 5 is an exploded view of the filter element assembly shown in FIG. 3A;

FIG. 6 is an exploded perspective view of the filter element assembly shown in FIG. 3A; and

fig. 7 is a schematic water path diagram of a water purifier according to another exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a filter element assembly; 200. a filter shell; 210. a first cartridge inlet; 220. a second filter element water inlet; 300. a filter element; 310. a water inlet end; 500. a pressure reducing valve; 501. a valve water inlet; 502. a valve outlet; 510. a valve housing; 511. a water inlet cavity; 512. a water outlet cavity; 512a, a limiting part; 513. a through hole; 514. a housing; 515. a cover body; 520. a pressure regulating member; 530. a flow regulating member; 531. a tapered portion; 532. a connecting portion; 540. a first elastic member; 550. a second elastic member; 560. a seal ring; 570. an end cap; 600. and a water stop valve.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

In accordance with one aspect of the present invention, a filter element assembly 100 is provided, as shown in fig. 1-2, 3A-3B, and 4-6. The cartridge assembly 100 may be applied to various water purifiers, as shown in fig. 7, in which arrows schematically show the flow direction of water in the water purifier. In the embodiment shown in the drawings, a plurality of filter elements are provided in the water purifier, and the filter cartridge assembly 100 filters water together with other filter elements. In other embodiments not shown, the water purifier may have only the filter element assembly 100 therein. Therefore, according to another aspect of the present invention, there is also provided a water purifier. The water purifier includes, but is not limited to, a household water purifier, a central water purifier, etc. The filter element assembly can also be applied to other water-requiring equipment if necessary.

As shown in fig. 1-2, 3A-3B, and 4-6, the cartridge assembly 100 can include a filter housing 200, a filter cartridge 300, and a pressure relief valve 500. The cartridge 300 can be housed within the filter housing 200. The filter element 300 may include any one of a front filter element (e.g., a PP cotton filter element and/or a front activated carbon filter element), a rear filter element (e.g., an activated carbon filter element), a reverse osmosis filter element, an ultrafiltration membrane filter element, or a composite filter element in which a plurality of these elements are combined. The filter housing 200 is provided with a first cartridge inlet 210 and a second cartridge inlet 220, as shown in fig. 3A-3B and fig. 4-6. One end of the first cartridge inlet 210 may communicate with the outside; the other end of the first cartridge inlet 210 may communicate with a valve inlet 501 of the pressure reducing valve 500. One end of the second cartridge inlet 220 may be in communication with the valve outlet 502 of the pressure reducing valve 500; the other end of the second cartridge inlet port 220 can be in communication with the inlet end 310 of the cartridge 300.

The pressure relief valve 500 may be provided on the filter housing 200. The pressure reducing valve 500 may be used to adjust the water pressure at the water outlet 502. In the embodiment shown in fig. 3B, an end cap 570 may be attached to the filter housing 200 to ensure the reliability of the communication of the valve inlet 501 of the pressure relief valve 500 with the first cartridge inlet 210 and the reliability of the communication of the valve outlet 502 of the pressure relief valve 500 with the second cartridge inlet 220. Alternatively, the pressure reducing valve 500 may be connected by any means such as screwing, bonding, welding, etc. to ensure the reliability that the valve inlet 501 of the pressure reducing valve 500 can be communicated with the first cartridge inlet 210 and the reliability that the valve outlet 502 of the pressure reducing valve 500 can be communicated with the second cartridge inlet 220.

As is known to those skilled in the art, pressure relief valves have a preset pressure threshold, which may be adjustable for some pressure relief valves. As the filter cartridge assembly 100 filters water, the water may enter the pressure relief valve 500 through the first filter cartridge inlet 210. If the water pressure is greater than the predetermined pressure threshold of the pressure reducing valve 500, the water pressure decreases after passing through the pressure reducing valve 500 and enters the water inlet end 310 of the filter cartridge 300 through the second filter cartridge water inlet 220.

Therefore, the filter element assembly 100 of the present invention can effectively reduce the length of the pipeline and the number of the pipeline joints by integrating the filter element 300 and the pressure reducing valve 500 together, so that the structural size of the water-requiring equipment (such as a water purifier) is small, and the water-requiring equipment is suitable for a narrow space; and the water leakage point is correspondingly reduced, and the water-requiring equipment (such as a water purifier) is safer and more reliable.

As shown in fig. 2, 3A-3B, and 4-6, the pressure relief valve 500 may include a valve housing 510, a flow regulator 530, and a reset member.

An inlet chamber 511 and an outlet chamber 512 may be provided within the valve housing 510. The valve inlet 501 may be provided on the inlet chamber 511. The valve outlet 502 may be disposed on the outlet chamber 512. The inlet chamber 511 and the outlet chamber 512 may be in communication via a through-hole 513.

The flow adjuster 530 is movably disposed within the valve housing 510. The flow rate regulating member 530 may be moved toward the through-hole 513 by the water pressure to reduce a gap between the flow rate regulating member 530 and a sidewall of the through-hole 513. The reset member may be directly connected to the flow rate adjusting member 530 or may be indirectly connected to the flow rate adjusting member 530 through other members as long as the flow rate adjusting member 530 can be returned to the initial position.

When water enters the filter element assembly 100 through the first filter element inlet 210, the water first enters the inlet chamber 511 of the pressure reducing valve 500 and then enters the outlet chamber 512 through the through hole 513. If the water pressure of the inlet chamber 511 is greater than the preset pressure threshold of the pressure reducing valve 500, the flow rate adjusting member 530 may be moved toward the through-hole 513 by the water pressure such that the gap between the flow rate adjusting member 530 and the sidewall of the through-hole 513 is reduced. If the water pressure of the inlet chamber 511 is less than the preset pressure threshold of the pressure reducing valve 500, the flow-regulating member 530 may return to its original position by the reset member. That is, when the water pressure in the inlet chamber 511 is greater, the water pressure forces the flow-regulating member 530 to move toward the through hole 513, thereby reducing the flow of water into the outlet chamber 512, such that the water pressure in the outlet chamber 512 is reduced, and thus the water pressure flowing into the filter housing 200 from the second cartridge inlet 220 is reduced. Therefore, water leakage of the filter element 300 caused by high water pressure of the water inlet end 310 can be avoided. When the water pressure of the water inlet end 310 is lower than the preset pressure threshold value of the pressure reducing valve, the pressure reducing effect is not achieved, and therefore the normal operation of the reverse osmosis filter element cannot be affected. In addition, the pressure reducing valve 500 is simple in structure and low in production cost.

Further, as shown in fig. 2, 3A-3B, and 4-6, the pressure relief valve 500 may also include a pressure regulator 520. In this case, the restoring member includes a first elastic member 540. The pressure adjustment member 520 is movably disposed within the outlet chamber 512. The flow rate adjusting member 530 may be connected to the pressure adjusting member 520 through the through hole 513. The first elastic member 540 may be connected between the pressure adjuster 520 and the valve housing 510. Preferably, the first elastic member 540 may be a spring.

If the water pressure in the inlet chamber 511 is greater than the predetermined pressure threshold of the pressure reducing valve 500, the pressure adjusting member 520 is moved downward from its initial position (in the orientation shown in fig. 3B, the moving direction of the pressure adjusting member 520 is a vertical direction) by the water pressure, so that the gap between the flow adjusting member 530 and the sidewall of the through-hole 513 is reduced. The pressure of the water entering the outlet chamber 512 is different according to the pressure of the water entering the pressure reducing valve 500, and thus the position of the pressure adjusting member 520 after being moved is different, that is, the position of the pressure adjusting member 520 after being moved may be multiple, but only one initial position is provided, which is determined by the structure of the pressure reducing valve 500. Illustratively, as shown in the figure, a limit part 512a may be disposed on a side wall of the water outlet chamber 512, and the limit part 512a determines an initial position of the pressure regulating member 520. If the water pressure of the inlet chamber 511 is less than the preset pressure threshold of the pressure reducing valve 500, the pressure regulator 520 is maintained at the initial position. Thus, the flow regulator 530 is returned to its original position, and the pressure reducing valve 500 has more stable performance and high reliability.

Further, as shown in fig. 2, 3A-3B, and 4-6, the flow regulating member 530 may include a tapered portion 531 and a connecting portion 532. The cone 531 may be disposed within the inlet chamber 511. One end of the connecting portion 532 may be connected to the small-sized end of the tapered portion 531. The other end of the connection portion 532 may be connected to the pressure adjusting member 520 through the through hole 513. The gap between the flow rate regulating member 530 and the sidewall of the through-hole 513 may be changed as the pressure regulating member 520 moves. The first elastic member 540 may be connected between the pressure adjuster 520 and the valve housing 510. Thus, the flow rate adjusting member 530 has a simple structure and a low production cost. And, as the water pressure of the inlet chamber 511 increases, the cone 531 is gradually approached to and inserted into the through hole 513, and the gap between the sidewall of the cone 531 and the sidewall of the through hole 513 is gradually reduced, so that the water pressure can be gradually adjusted to avoid a rapid change in the water pressure in the downstream filter element 300. The pressure reducing and adjusting function of the filter element is stable and gentle.

Alternatively, as shown in fig. 3B, the outer circumferential side of the valve housing 510 may be provided with a seal ring 560. The seal 560 can provide water tightness between the valve housing 510 and the filter housing 200, and prevent water from leaking from the outer periphery of the valve housing 510.

Alternatively, as shown in fig. 2, the valve housing 510 may be split-spliced. This may facilitate the provision of the pressure-adjusting member 520, the flow-adjusting member 530, and the first elastic member 540.

Preferably, as shown in fig. 2, 3A-3B, and 4-6, the valve housing 510 may include a housing body 514 and a cover body 515. The cover 515 is removably attached to the housing 514. The inlet chamber 511 may be provided on the housing 514. The housing 514 and the cover 515 may enclose to form the outlet chamber 512. The first elastic member 540 may be connected between the pressure-adjusting member 520 and the cover 515. The filter housing 200 may expose the cover 515.

By moving the cover 515, the distance between the housing 514 and the cover 515 may be adjusted, thereby changing the preset pressure threshold of the pressure relief valve 500. Thus, the pressure relief valve 500 can be adapted for use with a variety of filter cartridges 300 and has a greater range of applications. Furthermore, providing the valve housing 510 as a single piece also facilitates assembly and maintenance of the various components within the valve housing 510.

Further, as shown in fig. 2, 3A-3B, and 4-6, the cover 515 may be threadably attached to the housing 514. The threaded connection has the advantages of simple structure, reliable connection, convenient assembly and disassembly and the like, and is widely applied to mechanical structures. Alternatively, the portion of the cover body 515 exposed outside the filter housing 200 may be provided with, for example, a cross or a straight groove, so that the cover body 515 can be rotated by, for example, a cross screwdriver or a straight screwdriver.

Optionally, the restoring member may further include a second elastic member 550. The second elastic member 550 may be disposed in the inlet chamber 511. The second elastic member 550 may be connected to the flow rate regulating member 530. Preferably, the second elastic member 550 may be a spring. By providing the second elastic member 550, the other end of the flow rate adjusting member 530 can be coupled to the filter housing 200, and the flow rate adjusting member 530 can be more reliable. The second elastic member 550 may also return the flow rate adjusting member 530 to its original position, thereby ensuring stable performance of the pressure reducing valve 500.

Preferably, as shown in fig. 2, 3A-3B and 4-6, the through hole 513 and the cover body 515 may be oppositely disposed along the moving direction of the flow rate adjusting member 530. The cover 515 may be movably coupled to the housing 514 along the moving direction of the flow rate adjusting member 530. The pressure reducing valve 500 is thus relatively simple in construction and inexpensive to manufacture.

Preferably, as shown in fig. 2, 3A-3B, and 4-6, the flow-regulating member 530 may move in a direction parallel to the axial direction of the filter cartridge 300. The valve inlet 501 and the valve outlet 502 may extend in a lateral direction perpendicular to the axial direction. This prevents the filter element assembly 100 from being excessively large in the radial direction, and the filter element assembly 100 is compact.

Preferably, as shown in fig. 2, 3A-3B, and 4-6, the first cartridge inlet 210, the second cartridge inlet 220, and the pressure relief valve 500 may be arranged side-by-side along a lateral direction perpendicular to the axial direction of the cartridge 300. This can make full use of the radial space of the filter element assembly 100, so that the axial size of the filter element assembly 100 can be shortened, and the filter element assembly 100 is more exquisite and small.

Preferably, as shown in fig. 2, 3A-3B, and 4-6, a water stop valve 600 may be disposed within the first cartridge inlet 210. Because the first cartridge inlet 210 is positioned alongside the pressure relief valve 500, the first cartridge inlet 210 has sufficient space to accommodate the stop valve 600. The stop valve 600 may be any of a variety of types known in the art or that may occur in the future. Through setting up stagnant water valve 600, can ensure that filter element group spare 100 dismantles the back, do not have water to flow from first filter core water inlet 210 in, avoid scurrying water between the water route to prevent the waste of water resource. Also, the provision of the water stop valve 600 does not result in an increase in the axial dimension of the filter cartridge assembly 100.

Although the water outlet of the cartridge assembly 100 is not described above, it will be understood by those skilled in the art that the water outlet of the cartridge assembly 100 may be implemented using any suitable structure known in the art. Optionally, a water stop valve may be disposed in the water outlet.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (12)

1. The utility model provides a filter element group spare, it is including straining the shell and holding filter core in the shell, its characterized in that, be provided with first filter core water inlet and second filter core water inlet on straining the shell, filter element group spare is still including setting up relief pressure valve on the shell, the one end and the outside intercommunication and the other end of first filter core water inlet with the valve water inlet intercommunication of relief pressure valve, the one end of second filter core water inlet with the valve delivery port intercommunication and the other end of relief pressure valve with the end intercommunication of intaking of filter core, the relief pressure valve is used for adjusting the water pressure of valve delivery port department.

2. The filter element assembly according to claim 1, wherein the pressure relief valve comprises:

the valve comprises a valve shell, a water inlet cavity and a water outlet cavity are arranged in the valve shell, the valve water inlet is arranged on the water inlet cavity, the valve water outlet is arranged on the water outlet cavity, and the water inlet cavity is communicated with the water outlet cavity through a through hole;

a flow rate regulating member movably disposed in the valve housing, the flow rate regulating member being moved toward the through-hole by water pressure to reduce a gap between the flow rate regulating member and a sidewall of the through-hole; and

and the resetting piece is used for returning the flow regulating piece to the initial position.

3. The filter element assembly according to claim 2, wherein said pressure relief valve further comprises a pressure regulating member movably disposed within said outlet chamber, said flow regulating member being connected to said pressure regulating member through said through hole,

the reset member includes a first resilient member connected between the pressure adjustment member and the valve housing.

4. The filter element assembly according to claim 3, wherein the flow regulating member comprises a tapered portion and a connecting portion, the tapered portion being disposed in the water inlet chamber, one end of the connecting portion being connected to a small-sized end of the tapered portion, and the other end of the connecting portion being connected to the pressure regulating member through the through-hole, a gap between the flow regulating member and a side wall of the through-hole being varied as the pressure regulating member is moved.

5. The filter element assembly according to claim 3, wherein said valve housing comprises a housing and a cover movably connected to said housing, said inlet chamber being disposed on said housing, said housing and said cover enclosing said outlet chamber, said first resilient member being connected between said pressure adjustment member and said cover, said filter housing exposing said cover.

6. The filter element assembly according to claim 5, wherein the cover is threaded to the housing.

7. The filter element assembly according to claim 5, wherein the through-hole and the cover are oppositely disposed along a moving direction of the flow regulating member, the cover being movably coupled to the housing along the moving direction of the flow regulating member.

8. The filter element assembly according to claim 2, wherein said reset member comprises a second resilient member disposed within said water inlet chamber, said second resilient member being connected to said flow regulating member.

9. The filter element assembly according to claim 2, wherein the direction of movement of the flow regulating member is parallel to the axial direction of the filter element, the valve inlet and the valve outlet extending in a lateral direction perpendicular to the axial direction.

10. The filter element assembly of claim 1, wherein the first filter element inlet, the second filter element inlet, and the pressure relief valve are arranged side-by-side along a lateral direction perpendicular to an axial direction of the filter element.

11. The filter element assembly according to claim 1, wherein a water stop valve is disposed within said first filter element inlet.

12. A water purification machine comprising a filter element assembly according to any one of claims 1 to 11.

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