CN216878761U

CN216878761U - Filter element assembly and water purifying equipment

Info

Publication number: CN216878761U
Application number: CN202220186367.7U
Authority: CN
Inventors: 付于博; 陈子斌; 舒毅; 吉艳飞; 申鸿海
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-07-05
Anticipated expiration: 2032-01-24

Abstract

The utility model relates to a filter element assembly and water purification equipment, comprising: a filter flask; the adapter is arranged at the bottle mouth of the filter bottle, a through hole capable of communicating the inner side space and the outer side space of the filter bottle is arranged in the adapter, the through hole comprises a limiting hole section and a water passing hole section which are communicated with each other, the limiting hole section and the water passing hole section are sequentially arranged in the axial direction of the through hole, and the water passing hole section is positioned at one side of the limiting hole section, which is close to the inner space of the filter bottle; the valve core can be inserted into the through hole from the outer side of the filter flask, the valve core is in interference fit with the hole wall of the limiting hole section when the valve core is positioned in the limiting hole section, and a water passing gap is formed between the valve core and the hole wall of the water passing hole section when the valve core is positioned in the water passing hole section. During assembly, the valve core can be extruded to penetrate through the limiting hole section by force and then inserted into the water passing hole section, the assembly process is simple and rapid, and the assembly efficiency of the filter element assembly is improved.

Description

Filter element assembly and water purifying equipment

Technical Field

The utility model relates to the technical field of filtering equipment, in particular to a filter element assembly and water purifying equipment.

Background

The filter element assembly is an important part in water purification equipment, and raw water is filtered by the filter element assembly to obtain pure water with higher water quality for users to use. The filter element group spare generally includes the filter flask and sets up the filter core in the filter flask, and specific filter core can be for including leading filter core and the compound filter core of rearmounted filter core, also can be for including reverse osmosis membrane's reverse osmosis membrane filter core. The filtering capacity of the filter element assembly is closely related to the filter element therein. The bottleneck department of filter flask can set up the adapter for with the water clearance or the central tube of crossing in the filter core be used for circulating the passageway intercommunication of pure water, raw water or dense water, when making the filter core subassembly assemble in the water purification unit, the water route among above-mentioned passageway and the water purification unit switches on. And when changing the filter element group spare in the water purification unit, leak outside for the water of avoiding among the filter element, can set up the case in the adapter and come the shutoff adapter. And the disassembly and assembly process of the common valve core is more complicated, and the assembly efficiency of the filter element assembly is lower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a filter element assembly and water purification equipment aiming at the problems that the disassembly and assembly process of a valve element in the filter element assembly is complicated and the overall assembly efficiency of the filter element assembly is low, so that the disassembly and assembly process of the valve element is simplified and the assembly efficiency of the filter element assembly is improved.

A filter element assembly, comprising:

a filter flask;

the adapter is arranged at the bottle mouth of the filter bottle, a through hole capable of communicating the inner side space and the outer side space of the filter bottle is arranged in the adapter, the through hole comprises a limiting hole section and a water passing hole section which are communicated with each other, the limiting hole section and the water passing hole section are sequentially arranged in the axial direction of the through hole, and the water passing hole section is positioned at one side of the limiting hole section, which is close to the inner space of the filter bottle;

the valve core can be inserted into the through hole from the outer side of the filter flask, the valve core is in interference fit with the hole wall of the limiting hole section when the valve core is positioned in the limiting hole section, and a water passing gap is formed between the valve core and the hole wall of the water passing hole section when the valve core is positioned in the water passing hole section.

Above-mentioned scheme provides a filter element group spare, will in the adapter the through-hole design is for including spacing hole section with cross the form of water hole section, just the case with the pore wall of spacing hole section is interference fit's relation, thereby can exert oneself when the assembly the case extrusion passes spacing hole section and insert in crossing the water hole section, assembly process is simple swift, improves filter element group spare's packaging efficiency. And after the valve core is inserted into the water passing hole section, the valve core cannot exit the through hole under the limiting action of the hole wall of the limiting hole section in normal use, so that the filter element assembly is ensured to normally implement a filtering function.

In one embodiment, a first helical tooth is arranged on the hole wall of the limiting hole section, and the oblique direction of the first helical tooth is the same as the insertion direction of the valve core from the outside of the through hole into the through hole.

In one embodiment, the first helical teeth are protruding structures which surround the hole wall of the limiting hole section for a circle along the circumferential direction, the hole wall of the limiting hole section is provided with a plurality of first helical teeth, and the first helical teeth are sequentially arranged in the axial direction of the limiting hole section.

In one embodiment, the outer peripheral surface of the valve core is provided with a second helical tooth, and the oblique direction of the second helical tooth is opposite to the insertion direction of the valve core from the outside of the through hole to the inside of the through hole.

In one embodiment, the second helical teeth are a raised structure which surrounds the valve core for one circle along the circumferential direction of the valve core, the outer circumferential surface of the valve core is provided with a plurality of second helical teeth, and the plurality of second helical teeth are sequentially arranged in the axial direction of the valve core.

In one embodiment, the valve further comprises an elastic element, wherein the elastic element acts between the valve core and the adapter and is used for providing elastic force for the valve core to move from the water through hole section to the limiting hole section.

In one embodiment, the through hole further comprises a main hole section, the main hole section is located on one side, away from the limiting hole section, of the water passing hole section, the main hole section is communicated with the water passing hole section, the aperture of the main hole section is smaller than that of the water passing hole section, a step is formed at the junction of the main hole section and the water passing hole section, the elastic piece comprises a compression spring, the compression spring is located in the water passing hole section, the expansion direction of the compression spring is consistent with the axial direction of the water passing hole section, one end of the compression spring is abutted to the step, and the other end of the compression spring is abutted to the valve core.

In one embodiment, a positioning column is arranged at one end, facing the compression spring, of the valve core, the compression spring is sleeved outside the positioning column, and the inner diameter of the compression spring is smaller than the outer diameter of a position, connected with the positioning column, of the valve core.

In one embodiment, the filter element assembly further comprises a reverse osmosis membrane filter element positioned in the filter bottle, the reverse osmosis membrane filter element comprises a central tube and a reverse osmosis membrane sleeved outside the central tube, and the central tube is butted with the adapter so that a channel in the central tube is communicated with the through hole.

A water purification unit comprises the filter element assembly.

Above-mentioned scheme provides a water purification unit, through adopting the filter element subassembly in any embodiment of above-mentioned to promote assembly efficiency. And when the valve core is broken or damaged, the damaged valve core in the through hole can be forcibly drawn out, and then a new valve core is replaced. And part of parts of the filter element assembly can be reused, so that the replacement cost is saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a filter cartridge assembly according to the present embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

figure 3 is a cross-sectional view of the adapter of the present embodiment;

fig. 4 is a sectional view of the valve cartridge according to the present embodiment.

Description of reference numerals:

10. a filter element assembly; 11. a filter flask; 12. an adapter; 121. a through hole; 1211. a limiting hole section; 1212. a water passing hole section; 1213. a main bore section; 1214. a water passing groove; 1215. a first helical tooth; 122. a step; 13. a valve core; 131. a second helical tooth; 132. a positioning column; 14. an elastic member; 15. a reverse osmosis membrane filter element; 151. a central tube; 152. and (4) a reverse osmosis membrane.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in FIG. 1, in one embodiment, a filter cartridge assembly 10 is provided, comprising:

a filter flask 11;

the adapter 12 is disposed at a bottle mouth of the filter bottle 11, a through hole 121 capable of communicating the inner space and the outer space of the filter bottle 11 is disposed in the adapter 12, as shown in fig. 3, the through hole 121 includes a limiting hole section 1211 and a water passing hole section 1212 that are communicated with each other, the limiting hole section 1211 and the water passing hole section 1212 are sequentially arranged in the axial direction of the through hole 121, and the water passing hole section 1212 is located at one side of the limiting hole section 1211, which is close to the inner space of the filter bottle 11;

the valve core 13, the valve core 13 can be inserted into the through hole 121 from the outside of the filter flask 11, and when the valve core 13 is located in the limiting hole section 1211, the valve core 13 is in interference fit with the hole wall of the limiting hole section 1211, and when the valve core 13 is located in the water passing hole section 1212, a water passing gap is formed between the valve core 13 and the hole wall of the water passing hole section 1212.

According to the filter element assembly 10 provided by the scheme, the through hole 121 in the adapter 12 is designed to comprise the limiting hole section 1211 and the water passing hole section 1212, and the valve element 13 and the hole wall of the limiting hole section 1211 are in an interference fit relationship, so that the valve element 13 can be extruded to penetrate through the limiting hole section 1211 and be inserted into the water passing hole section 1212 by force during assembly, the assembly process is simple and rapid, and the assembly efficiency of the filter element assembly 10 is improved. And after the valve core 13 is inserted into the water passing hole section 1212, the valve core 13 cannot exit the through hole 121 under the limiting action of the hole wall of the limiting hole section 1211 in normal use, thereby ensuring that the filter element assembly 10 normally performs a filtering function.

Moreover, after the valve core 13 enters the water passing hole section 1212, a water passing gap is formed between the valve core 13 and the hole wall of the water passing hole section 1212, and the internal channel of the filter element assembly 10 is communicated with the water path outside the filter element assembly 10 through the water passing gap, so that the filter element assembly 10 normally performs a filtering function.

When the filter element assembly 10 is taken out of the water purifying apparatus, the valve element 13 can abut against the hole wall of the limiting hole 1211, so that the through hole 121 is cut off, and the water in the filter bottle 11 is prevented from leaking out of the through hole 121.

Specifically, in some embodiments, as shown in fig. 3, a water passing groove 1214 extending axially along the hole wall of the water passing hole section 1212 is provided, and when the valve element 13 is located in the water passing hole section 1212, the valve element 13 and a side wall of the water passing groove 1214 enclose the water passing gap.

In other embodiments, the diameter of the water passing hole section 1212 is smaller than the outer diameter of the valve core 13, so that the water passing gap is formed between the hole wall of the water passing hole section 1212 and the valve core 13.

Further specifically, in some embodiments, the aperture of the position-limiting hole section 1211 is smaller than the outer diameter of the valve core 13, so that the hole wall of the position-limiting hole section 1211 can be in interference fit with the valve core 13.

Further, in an embodiment, as shown in fig. 1 and 2, in an embodiment, a hole wall of the limiting hole 1211 is provided with a first inclined tooth 1215, and an inclined direction of the first inclined tooth 1215 is the same as an insertion direction of the valve element 13 from the outside of the through hole 121 to the inside of the through hole 121. The direction indicated by an arrow F in fig. 2 is an insertion direction in which the valve body 13 is inserted from outside the through hole 121 into the through hole 121.

When the valve element 13 is inserted into the through hole 121 from outside the through hole 121, the valve element 13 is easy to pass through the limiting hole 1211 and enter the water passing hole 1212 along the inclined direction of the first inclined tooth 1215. After the valve core 13 enters the water through hole section 1212, if the valve core 13 needs to be drawn out of the through hole 121, the valve core 13 needs to pass through the position of the first inclined teeth 1215 against the inclination direction of the first inclined teeth 1215. Obviously, the valve core 13 is subjected to a larger resistance when exiting from the through hole 121, thereby ensuring that the valve core 13 is retained in the water passing hole section 1212 as much as possible after being inserted into the water passing hole section 1212. Of course, when the valve core 13 is damaged and needs to be replaced, the valve core 13 can be pulled by force to overcome the resistance exerted by the first inclined teeth 1215, and the valve core 13 in the through hole 121 can be taken out. The force required to merely push the valve element 13 into the through-opening 121 is clearly much less than the force required to withdraw the valve element 13 from the through-opening 121.

Specifically, in one embodiment, as shown in fig. 1 and 2, the first inclined teeth 1215 are raised structures that extend circumferentially around the wall of the retaining bore section 1211. So that when the cartridge assembly 10 is not in a filtering state after the valve core 13 enters the water passing hole section 1212, the valve core 13 can abut against the first inclined teeth 1215 to stop the through hole 121.

More specifically, as shown in fig. 2, a plurality of the first inclined teeth 1215 are provided on the hole wall of the restriction hole section 1211, and the plurality of the first inclined teeth 1215 are sequentially arranged in the axial direction of the restriction hole section 1211. The provision of a plurality of the first inclined teeth 1215 improves the reliability of the position limitation of the spool 13.

Similarly, in one embodiment, as shown in fig. 1, 2 and 4, a second helical tooth 131 is provided on the outer circumferential surface of the valve body 13, and the second helical tooth 131 is inclined in the direction opposite to the insertion direction of the valve body 13 from the outside of the through hole 121 into the through hole 121.

In the process of inserting the valve element 13 into the through hole 121, the hole wall of the limiting hole 1211 gradually presses each second helical tooth 131 along the oblique direction of the second helical tooth 131, and although a certain resistance is applied, the resistance is relatively small. After the valve core 13 is inserted into the water through hole section 1212, if the valve core 13 needs to be pulled out, the hole wall of the limiting hole section 1211 needs to press the second helical teeth 131 against the oblique direction of the second helical teeth 131, and obviously, the resistance at this time is much larger than the resistance when the valve core 13 is inserted into the through hole 121. Thereby enabling the valve core 13 to be easily inserted into the through hole 121 and to be difficult to be separated from the through hole 121 after being inserted.

Specifically, as shown in fig. 1, 2 and 4, in one embodiment, the second helical tooth 131 is a raised structure that surrounds the valve core 13 circumferentially. In a similar manner, when the second helical tooth 131 contacts with the hole wall of the limiting hole section 1211, the through hole 121 can be cut off.

More specifically, the outer circumferential surface of the valve element 13 is provided with a plurality of second helical teeth 131, the plurality of second helical teeth 131 are sequentially arranged in the axial direction of the valve element 13, so as to increase the resistance on the valve element 13 exiting from the through hole 121, and ensure that the valve element 13 can be reliably located in the water passing hole section 1212 after entering the water passing hole section 1212.

Although there is resistance due to interference fit when the valve element 13 is inserted into the through hole 121, the resistance is relatively small, so that the valve element 13 can be smoothly inserted into the through hole 121. After the valve core 13 is inserted into the water passing hole section 1212, if the valve core 13 needs to be drawn out of the through hole 121, the resistance to be overcome is large, and thus the valve core 13 is ensured to stably and reliably stay in the water passing hole section 1212.

Optionally, in other embodiments, the outer peripheral surface of the valve core 13 is a smooth surface. The hole wall of the limiting hole section 1211 is a smooth surface. But the diameter of the outer peripheral surface of the valve element 13 is larger than the diameter of the wall of the stopper hole. At this time, the valve core 13 and the hole wall of the limiting hole section 1211 can still have an interference fit relationship. However, at this time, the ease of insertion and extraction of the valve body 13 into and out of the through hole 121 are the same.

First and second

beveled teeth

1215, 131 as described herein, each refer to teeth having their tips offset from their roots. In other words, the two flanks of a tooth are not arranged symmetrically with respect to a reference plane passing through the tip and perpendicular to the root, the two flanks not being at the same angle to said reference plane. The direction of inclination of the first angled tooth 1215 and the direction of inclination of the second angled tooth both refer to the direction in which the tip of this angled tooth is offset from the root of the tooth. In the example shown in fig. 2, the first and second

helical teeth

1215 and 131 each have a flank a on the base plane and a flank B intersecting the base plane, with the flank B of the same first helical tooth 1215 being upstream of the flank a in the direction indicated by the arrow F in the drawing, and the flank a of the same second helical tooth 131 being upstream of the flank B in the direction indicated by the arrow F in the drawing.

Further, as shown in fig. 1, in an embodiment, the filter element assembly 10 further includes an elastic member 14, and the elastic member 14 acts between the valve element 13 and the adapter 12 to provide the valve element 13 with an elastic force moving from the water passing hole section 1212 to the limit hole section 1211.

When the cartridge 13 is inserted into the water through hole section 1212, the cartridge 13 can abut against the stopper hole section 1211 under the action of the elastic member 14 when the cartridge assembly 10 is not installed in the water purifying apparatus. Particularly, when the filter element assembly 10 is used for a period of time and water exists inside the filter element assembly 10, after the filter element assembly 10 is taken out from the water purifying equipment, the elastic member 14 can enable the valve core 13 to be abutted against the hole wall of the limiting hole section 1211, so that the through hole 121 is cut off, and the water is prevented from leaking.

Specifically, in one embodiment, as shown in fig. 3, the through hole 121 further includes a main hole section 1213, the main hole section 1213 is located on a side of the water passing hole section 1212, which is far away from the limiting hole section 1211, the main hole section 1213 is communicated with the water passing hole section 1212, a hole diameter of the main hole section 1213 is smaller than a hole diameter of the water passing hole section 1212, and a step 122 is formed at a junction of the two.

As shown in fig. 1, the elastic element 14 includes a compression spring, the compression spring is located in the water passing hole section 1212, the expansion and contraction direction of the compression spring is the same as the axial direction of the water passing hole section 1212, one end of the compression spring abuts against the step 122, and the other end of the compression spring abuts against the valve core 13. The compression spring provides the valve element 13 with a force that presses against the wall of the limiting bore 1211.

Alternatively, in other embodiments, the elastic element 14 may also be another element capable of providing an elastic force for the valve element 13 to move from the water passing hole section 1212 to the limiting hole section 1211, and is not limited herein.

Further, in an embodiment, as shown in fig. 4, a positioning pillar 132 is disposed on one end of the valve core 13 facing the compression spring, the compression spring is sleeved outside the positioning pillar 132, and an inner diameter of the compression spring is smaller than an outer diameter of a position of the valve core 13 connected to the positioning pillar 132. Under the guiding and positioning action of the positioning column 132, the expansion and contraction process of the compression spring is smoother.

Further, as shown in fig. 1, in one embodiment, the filter cartridge assembly 10 further comprises a reverse osmosis membrane cartridge 15 located in the filter bottle 11. The reverse osmosis membrane filter element 15 comprises a central tube 151 and a reverse osmosis membrane 152 sleeved outside the central tube 151, wherein the central tube 151 is butted with the adapter 12, so that a channel in the central tube 151 is communicated with the through hole 121.

Get into raw water in the filter flask 11 is in reverse osmosis membrane 152 filters the back and obtains pure water and dense water, center tube 151 with adapter 12 intercommunication then can ensure that each mouth of a river of filter element subassembly 10 is normal business turn over water, ensures that the filtration process goes on normally.

Further, in another embodiment, a water purifying apparatus is provided, which comprises the above-mentioned filter element assembly 10.

Above-mentioned scheme provides a water purification unit, through adopting the filter element subassembly 10 in any embodiment of the aforesaid to promote assembly efficiency. When the valve core 13 is broken or otherwise damaged, the damaged valve core 13 in the through hole 121 can be forcibly drawn out, and then a new valve core 13 is replaced. So that part of the parts of the filter element assembly 10 can be reused, and the replacement cost is saved.

Further, the water purifying apparatus includes a body, and when the filter element assembly 10 is mounted on the body, the valve element 13 is pressed by the body toward the inside of the filter bottle 11 and spaced from the limiting hole 1211, so that the water passing gap is communicated with a water path in the body.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 the present invention, unless otherwise expressly stated or limited, 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 an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A filter element assembly, comprising:

a filter flask;

2. The filter element assembly according to claim 1, wherein the wall of the limiting hole section is provided with first helical teeth, and the first helical teeth are inclined in the same direction as the valve element is inserted into the through hole from the outside of the through hole.

3. The filter element assembly according to claim 2, wherein the first helical teeth are raised structures which surround the hole wall of the limiting hole section for one circle along the circumferential direction, the hole wall of the limiting hole section is provided with a plurality of first helical teeth, and the first helical teeth are sequentially arranged in the axial direction of the limiting hole section.

4. The filter element assembly according to any one of claims 1 to 3, wherein the outer peripheral surface of the valve element is provided with second helical teeth having a direction of inclination opposite to the direction of insertion of the valve element from outside into the through hole.

5. The filter element assembly according to claim 4, wherein the second helical teeth are raised structures which surround the valve element circumferentially, and a plurality of the second helical teeth are arranged on the outer circumferential surface of the valve element and are arranged in sequence in the axial direction of the valve element.

6. The filter element assembly according to any one of claims 1 to 3, further comprising a resilient member acting between the valve element and the adaptor for providing the valve element with a resilient force to move from the feed bore section into the stopper bore section.

7. The filter element assembly according to claim 6, wherein the through hole further comprises a main hole section, the main hole section is located on one side of the water passing hole section away from the limiting hole section, the main hole section is communicated with the water passing hole section, the aperture of the main hole section is smaller than that of the water passing hole section, a step is formed at the junction of the main hole section and the water passing hole section, the elastic member comprises a compression spring, the compression spring is located in the water passing hole section, the expansion direction of the compression spring is consistent with the axial direction of the water passing hole section, one end of the compression spring is abutted to the step, and the other end of the compression spring is abutted to the valve element.

8. The filter element assembly according to claim 7, wherein said valve element has a positioning post at an end thereof facing said compression spring, said compression spring is sleeved outside said positioning post, and an inner diameter of said compression spring is smaller than an outer diameter of a position of said valve element connected to said positioning post.

9. The filter element assembly of any one of claims 1 to 3, further comprising a reverse osmosis membrane filter element located in the filter flask, wherein the reverse osmosis membrane filter element comprises a central tube and a reverse osmosis membrane sleeved outside the central tube, and the central tube is butted with the adapter joint to enable a channel in the central tube to be communicated with the through hole.

10. A water purification apparatus, comprising a filter element assembly according to any one of claims 1 to 9.