CN217567725U - Filter element assembly and desk-top purifier - Google Patents

Abstract

The embodiment of the utility model provides a filter element group spare and desk-top purifier. The filter element assembly comprises: the filter shell is provided with a water inlet and a water outlet; the first filter element is arranged in the filter shell, the bottom of the first filter element is abutted against the bottom in the filter shell, the top of the first filter element is abutted against the top in the filter shell, and the outer side surface of the first filter element is communicated with the water inlet; the inner lining pipe is arranged in the first filter element and is spaced from the inner side face of the first filter element, the bottom of the inner lining pipe is abutted to the bottom in the filter shell, a gap is formed between the top of the inner lining pipe and the top in the filter shell, and the inner side face of the first filter element is communicated with the water outlet through the gap. When the purified water filtered by the first filter element passes through the gap, the purified water can carry most or even all air to flow, and the air is discharged through the water outlet. Thus, no or less air is trapped within the filter housing. Therefore, after water taking is completed, the phenomenon of residual water flowing out due to air remaining in the filter element assembly can be avoided.

Description

Filter element assembly and desk-top purifier

Technical Field

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

Background

With the improvement of living standard, people have higher and higher requirements on water quality. The popularization of the water purifier is becoming wider and wider, and products with new technologies are better meeting the requirements of people. Desktop water purifiers are popular as an important component of water purifiers.

In the prior art, a desktop water purifier may be connected downstream of the faucet. Can open the tap when the user needs the water intaking, the raw water can enter into the filter element group spare of desk-top purifier through the tap to filter through the filter element group spare, with the output water purification. When the user finishes taking water, the faucet can be closed, and the raw water is stopped by the faucet.

However, since there is a certain amount of air in the raw water, the air is retained at the top of the filter housing when passing through the desktop water purifier. When the user finishes taking water and closes the faucet, the water outlet joint of the desk type water purifier still can flow out residual water. Therefore, the filter element assembly causes waste of water resources and the user experience is poor.

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 assembly comprises: the filter shell is provided with a water inlet and a water outlet; the first filter element is arranged in the filter shell, the bottom of the first filter element is abutted against the bottom in the filter shell, the top of the first filter element is abutted against the top in the filter shell, and the outer side surface of the first filter element is communicated with the water inlet; and the lining pipe is arranged in the first filter element and is spaced from the inner side surface of the first filter element, the bottom of the lining pipe is abutted against the bottom in the filter shell, a gap is formed between the top of the lining pipe and the top in the filter shell, and the inner side surface of the first filter element is communicated with the water outlet through the gap.

In practical application of the existing desktop water purifier, in the process of filtering raw water through the filter element assembly, air in the raw water also enters and remains in the filter shell. Due to the low mass of air, the air can remain at the top of the filter housing. And in the embodiment of the utility model provides an among the filter element group spare, because the gap is located the top of filter shell, when the filterable water purification through first filter core passes through the gap, the water purification can carry most or even whole air flow to discharge the air through the delivery port. Thus, no or less air is trapped within the filter housing. Therefore, after water taking is completed, the phenomenon of residual water flowing out due to air remaining in the filter element assembly can be avoided. Therefore, the filter element component can not cause the waste of water resources, and the use experience of users is better. And the surface areas of the outer side surface and the inner side surface of the first filter element are larger, so that the areas of the water inlet end and the water outlet end of the first filter element are larger, and the flux of the first filter element is larger. Like this, the water yield of first filter core improves, and filter core group spare is used and is experienced further improvement. And, because the water that passes through the gap is the pure water to can restrain the phenomenon of depositing the filth in gap department, consequently the filter element group spare is difficult for appearing because of the phenomenon that the filth deposits in gap department and leads to appearing blockking up after long-term the use.

Illustratively, the filter element assembly further comprises a second filter element disposed within the inner liner, the second filter element communicating between the aperture and the water outlet. First filter core and second filter core can form multi-stage filtration to ensure that the quality of water purification is higher, user's health can be protected.

Illustratively, the liner tube includes a first liner tube and a second liner tube, a bottom of the second liner tube abutting a bottom within the filter housing, a top of the second liner tube connected to the bottom of the first liner tube, a gap disposed between the top of the first liner tube and the top within the filter housing, and a second filter cartridge disposed within the second liner tube. The installation of second filter core is more convenient.

Illustratively, the top of the second liner tube is inserted to the bottom of the first liner tube. By the arrangement, the first lining pipe and the second lining pipe are convenient to mount and dismount, so that the production efficiency and the maintenance efficiency can be improved.

Illustratively, the bottom inside the filter housing is provided with a tray, wherein the edge of the tray is provided with a first annular wall extending upwards, into which the bottom of the first filter cartridge is inserted. So set up, the installation and the dismantlement of first filter core are more convenient, use experience better.

Illustratively, a tray is provided at the bottom inside the filter housing, wherein the tray is provided at the middle thereof with a second annular wall extending upward, and the bottom of the second liner tube is inserted into the second annular wall. So set up, the installation and the dismantlement of bushing pipe in the second are more convenient, and use experience is better.

Illustratively, the lower part of the filter shell is provided with a through hole, the bottom surface of the tray is provided with a water passing hole inserted into the through hole, and the water passing hole is communicated between the second filter element and the water outlet. By the arrangement, the connecting structure of the second lining pipe and the filter shell is simple, and the manufacturing cost is low. And, the through-hole can also play the effect of location, ensures the position of tray relatively fixed to make the batch uniformity of filter element subassembly better.

Illustratively, the second filter element has a water filter and a gas filter. So set up, the gas effect of passing of second filter core is better. Thus, the water passing through the gap can carry air to pass through the second filter element more easily, thereby improving the exhaust effect of the filter element assembly.

Illustratively, the water inlet and outlet are located in a lower portion of the filter housing. So arranged, the waterway channel that the water flows in the filter shell can be approximately shaped like a 'ji'. In this way, the length of the waterway channel at the top of the filter element assembly is short, and air can be intensively reserved. Also, the length of the slit is relatively short, so that concentrated discharge of air can be facilitated.

Illustratively, the flow area of the aperture is smaller than the flow area of other portions within the filter housing. So set up, the effect of spraying can be formed when the water purification passes through the gap. Thus, the purified water can carry as much air as possible, thereby enabling the exhaust effect of the filter element assembly to be better.

Illustratively, a flange is disposed at a top of an outer side of the liner tube, the flange abutting an inner side of the first filter element. Through setting up the flange, can play the effect of lining pipe in the support and first filter core to the position of lining pipe and first filter core is comparatively fixed in the messenger, thereby ensures filter element group spare stable performance.

Illustratively, a top cover is disposed at the top inside the filter housing, a third annular wall extends downwards from the edge of the top cover, and the top of the first filter cartridge is inserted into the third annular wall. So set up, the installation and the dismantlement of first filter core are more convenient, use and experience better.

According to another aspect of the utility model, still provide a desk-top purifier. Desk-top purifier includes: a water inlet joint and a water outlet joint; and the filter element component is any one of the filter element components, the water inlet connector is connected to the water inlet, and the water outlet connector is connected to the water outlet.

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 utility model are used as part of the utility model for understanding the utility model. 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 front view of a desktop water purifier according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the desktop water purifier shown in FIG. 1;

FIG. 3 is a sectional view of the internal structure of the desktop water purifier shown in FIG. 1; and

fig. 4 is a schematic water path diagram of a desktop water purifier according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a filter element assembly; 210. a first filter element; 211. an outer side surface; 212. an inner side surface; 213. a PP filter element; 214. a carbon fiber filter element; 300. a filter shell; 301. a water inlet; 302. a water outlet; 303. a gap; 310. a base; 320. a housing; 330. a decorative ring; 340. a through hole; 350. a decorative cover; 360. a tray; 361. a first annular wall; 362. a second annular wall; 370. a top cover; 371. a third annular wall; 380. a water outlet; 390. a flange; 400. a liner tube; 410. a first liner tube; 420. a second liner tube; 500. air; 610. a water inlet joint; 611. bending the pipe; 612. a nut; 620. a water outlet joint; 621. and a seal.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the invention. One skilled in the art, however, will understand that the following description merely illustrates preferred embodiments 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.

To reduce trapped air, according to one aspect of the present invention, a filter element assembly is provided. The cartridge assembly can be applied to any suitable water purifier. Therefore, according to another aspect of the present invention, there is also provided a desktop water purifier. The filter cartridge assembly 100 and the desktop water purifier according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 4. Wherein the arrows shown in fig. 4 schematically show the flow direction of water in the filter cartridge assembly 100 and the desktop water purifier.

The cartridge assembly 100 can include a cartridge housing 300, a first cartridge 210, and a liner tube 400.

The first filter cartridge 210 may be disposed within the filter housing 300. The filter housing 300 can protect the first filter element 210. Specifically, the filter housing 300 may include a base 310 and a housing 320. The housing 320 may be coupled to the base 310 by any suitable means, such as a threaded connection or a connector connection. The base 310 and the housing 320 may surround to form a receiving space to receive the first filter cartridge 210. Illustratively, the filter housing 300 may further include a decorative ring 330. The bezel 330 may be located between the base 310 and the housing 320. The decorative ring 330 may serve as a decoration to make the filter housing 300 more aesthetically pleasing. Illustratively, the filter housing 300 may further include a decorative cover 350. The cosmetic cover 350 may be coupled to the top of the exterior of the case 320. The decorative cover 350 may serve as a decoration to make the filter housing 300 more aesthetically pleasing.

The filter housing 300 may be provided with a water inlet 301 and a water outlet 302.

The water inlet 301 may be located at any suitable location on the filter housing 300. The water inlet 301 may be for communication to a water source. The water source may supply raw water, which may enter the filter housing 300 through the water inlet 301. Water sources include, but are not limited to, municipal waterways or tanks, and the like. The water inlet 301 may be connected to a tap, which may be connected to a water supply. To facilitate the connection of the water inlet 301 to the faucet, the desktop water purifier may also include a water inlet connector 610. One end of the water inlet joint 610 may be connected to the water inlet 301 by any suitable means such as welding, gluing or snapping. The other end of the water inlet fitting 610 may be used to connect to a faucet. Illustratively, the other end of the water inlet joint 610 may be directly connected to the faucet or indirectly connected to the faucet through a pipe or the like. The water inlet connector 610 includes, but is not limited to, a quick connector, a bayonet connector, a threaded connector, or the like. In the embodiment shown in the figures, the water inlet fitting 610 may include an elbow 611 and a nut 612. Nut 612 may be used to connect to a faucet. The elbow 611 may be connected between the water inlet 301 and the nut 612.

The raw water may be filtered through the first filter cartridge 210 to produce purified water. The filtered purified water may flow out through the water outlet 302. The water outlet 302 may be located at any suitable location on the filter housing 300. The user can access the purified water through the water outlet 302 for drinking or cooking, etc. In order to facilitate the user to access the purified water, the desktop water purifier may further include a water outlet connector 620. One end of the water outlet connector 620 can be connected to the water outlet 302 by any suitable means such as welding, bonding, or clamping. The user can get the water purification through the other end connection of water outlet connector 620. The outlet fitting 620 includes, but is not limited to, a gooseneck, etc. In the embodiment shown in the figures, the desktop water purifier may further include a seal 621. A seal 621 may be clamped between the outlet 302 and the outlet fitting 620 to provide a better seal. The sealing member 621 includes, but is not limited to, a sealing ring or a sealing gasket, etc. The number of seals 621 may be arbitrary.

A waterway passage may be formed between the inlet 301 and the outlet 302. That is, one end of the waterway channel may be communicated to the water inlet 301. After passing through the water inlet 301, the raw water may enter the filter housing 300 and flow in the waterway channel. The other end of the waterway channel can be connected to the water outlet 302. The first filter element 210 may be disposed at any suitable location on the waterway.

The first filter element 210 may be any type of filter element known in the art or that may come into existence in the future, including, but not limited to, a carbon fiber filter element, a PP filter element, a ceramic filter element, an ultrafiltration membrane filter element, or a composite filter element formed by combining a plurality of filter elements. In the embodiment shown in the figures, the first cartridge 210 may include a PP cartridge 213 and a carbon fiber cartridge 214. The PP filter element 213 can be jacketed with a carbon fiber filter element 214.

The bottom of the first cartridge 210 can abut the bottom inside the filter housing 300. The top of the first cartridge 210 can abut the top inside the filter housing 300. Accordingly, the first filter cartridge 210 can entirely occupy the space within the filter case 300 in the axial direction of the filter case 300. The directional terms used herein are relative to the filter element assembly 100 in the arrangement shown in fig. 1-2, i.e., the top portion is an upper portion and the opposite bottom portion is a lower portion. The outer side 211 of the first cartridge 210 may communicate with the water inlet 301. That is, the outer side 211 may form a water inlet end of the first filter cartridge 210. Raw water can enter the first filter element 210 through the water inlet 301 and the outer side surface 211 in sequence for filtration. In the embodiment shown in the figures, the outer side of the PP insert 213 is the outer side 211 of the first insert 210.

The liner tube 400 may be disposed within the first cartridge 210. The liner tube 400 may be spaced from the interior side 212 of the first cartridge 210. The bottom of the liner tube 400 may abut the bottom inside the filter housing 300. A gap 303 may be provided between the top of the liner tube 400 and the top inside the filter housing 300. It will be appreciated that the flow area of the slot is small. The flow area is an area of a cross section formed by cutting the slit 303 in a direction perpendicular to the flow direction of water. The cut-away breaks the gap 303. The waterway channel may include a slit 303.

The inner side 212 of the first cartridge 210 can communicate with the outlet 302 through the gap 303. That is, the first filter element 210 may be located upstream of the gap 303. The inner side 212 can form the water outlet end of the first cartridge 210. Raw water can enter the first filter element 210 through the outer side surface 211 for filtration, and filtered clean water can flow out through the inner side surface 212. The purified water may then flow out through the space of the liner tube 400 spaced apart from the inner side surface 212, the slit 303, the space inside the liner tube 400, and the water outlet 302 in this order. Thus, the space between the inlet 301 and the outer side 211, the space where the liner tube 400 is spaced from the inner side 212, the slit 303, and the space within the liner tube 400 may all be part of the waterway. In the embodiment shown, the inner side of the carbon fiber filter element 214 is the inner side 212 of the first filter element 210.

Illustratively, the filter cartridge assembly 100 may also include a flange 390. The flange 390 may be disposed on the exterior side of the liner 400 by any suitable means such as welding, gluing, or molding. The flange 390 can abut the inner side 212 of the first cartridge 210. It will be appreciated that the flange 390 does not completely block off the space between the inner liner tube 400 and the inner side 212 in the circumferential direction of the filter housing 300. That is, although the flange 390 is provided, the clean water flowing out through the inner side surface 212 may pass through the slit 303 to flow out from the water outlet 302. The number of flanges 390 can be any number including, but not limited to, one, two, or more. The flange 390 can support the inner lining pipe 400 and the first filter element 210, so that the positions of the inner lining pipe 400 and the first filter element 210 are fixed, and the performance stability of the filter element assembly 100 is ensured.

In practical application of the existing desktop water purifier, in the process of filtering raw water through the filter element assembly, air in the raw water also enters and remains in the filter shell. Due to the low mass of air, the air can remain on top of the filter housing. In the filter element assembly 100 according to the embodiment of the present invention, referring to fig. 4, since the gap 303 is located at the top of the filter housing 300, when the purified water filtered by the first filter element 210 passes through the gap 303, the purified water can carry most or even all of the air 500 to flow, and the air 500 is discharged through the water outlet 302. Thus, no or less air 500 is trapped within the filter housing 300. Thus, after water is taken, the filter element assembly 100 does not have residual water flowing out due to the air 500. Therefore, the filter element assembly 100 does not cause waste of water resources, and the user experience is good. Also, the outer side 211 and inner side 212 of the first filter element 210 have a larger surface area and therefore a larger area at the inlet and outlet ends, resulting in a larger flux in the first filter element 210. In this way, the water production of the first filter element 210 is increased and the use experience of the filter cartridge assembly 100 is further improved. And, because the water passing through the gap 303 is purified water, the phenomenon of depositing dirt at the gap 303 can be inhibited, so that the filter element assembly 100 is not easy to block due to the dirt deposited at the gap 303 after long-term use.

Illustratively, the flow area of the aperture 303 may be smaller than the flow area of other portions within the filter housing 300. For example, the flow area of the slots 303 may be smaller than the flow area between the water inlet 301 and the outer side 211, the flow area between the liner tube 400 and the inner side 212, and the flow area within the liner tube 400. So configured, the clean water will have a jetting effect when passing through the gap 303. In this way, the clean water can carry as much air 500 as possible, thereby allowing for better venting of the filter element assembly 100.

Illustratively, the water inlet 301 and the water outlet 302 may be located at a lower portion of the filter cartridge assembly 100. In one embodiment, the water inlet 301 and the water outlet 302 may be disposed on the base 310 of the filter housing 300. So configured, the waterway path through which water flows inside the filter case 300 may be substantially "several" shaped. In this way, the length of the waterway channel at the top of the cartridge assembly 100 is short, and the air 500 can be intensively trapped. Also, the length of the slit 303 is relatively short, so that concentrated discharge of the air 500 may be facilitated.

Illustratively, the cartridge assembly 100 may also include a second cartridge (not shown). A second filter element can be disposed within the inner liner 400. The second cartridge can communicate between the gap 303 and the outlet 302. The second filter element can be any type of filter element known in the art or that may come into existence in the future, including but not limited to carbon fiber filter elements, PP filter elements, ceramic filter elements, ultrafiltration membrane filter elements, or composite filter elements formed by combining a plurality of filter elements. The first cartridge 210 and the second cartridge may be the same or different. In the embodiment shown in the figures, the second filter element can comprise an ultrafiltration membrane filter element.

Raw water may enter the filter case 300 through the water inlet 301 and be filtered by the first filter cartridge 210. The filtered clean water may pass through the gap 303, then through the second filter element for filtering, and then out through the outlet 302. The first filter element 210 and the second filter element can form multi-stage filtration, so that the water quality of purified water is high, and the health of a user can be guaranteed.

Since the second filter element is located downstream of the gap 303, the purified water passing through the gap 303 can carry the air 500 through the second filter element to be discharged when passing through the second filter element. Accordingly, the venting effectiveness of the second filter element largely determines the venting effectiveness of the filter element assembly 100. And for the existing filter element, the air passing effect is relatively poor.

Illustratively, the second filter element may have a water filter and a gas filter. Specifically, the second filter element can be provided with a filter material cavity. The water passing filter material and the air passing filter material can be arranged in the filter material cavity. The aqueous filtration material may include aqueous membrane filaments. The air filter may include air film filaments. The water filtering material and the air filtering material can be connected by weaving and the like. So set up, the gas effect of passing of second filter core is better. In this manner, water passing through the gap 303 can carry the air 500 more easily through the second filter element, thereby improving the venting effect of the filter element assembly 100.

Illustratively, the liner tube 400 may include a first liner tube 410 and a second liner tube 420. The first and second liner pipes 410 and 420 may be sequentially arranged in an axial direction of the filter case 300. The bottom of the second liner tube 420 may abut the bottom inside the filter housing 300. The top of the second liner tube 420 may be connected to the bottom of the first liner tube 410 by any suitable means, such as welding, gluing, or molding. In one embodiment, the top of the second liner tube 420 may be inserted to the bottom of the first liner tube 410. With this arrangement, the first and second liner pipes 410 and 420 can be easily assembled and disassembled, thereby improving the efficiency of production and maintenance. The gap 303 may be disposed between the top of the first liner tube 410 and the top inside the filter housing 300. A second cartridge may be disposed within the second liner tube 420. The installation of second filter core is more convenient.

Illustratively, the filter housing 300 may have a tray 360. The tray 360 may be disposed at the bottom inside the filter housing 300.

The edge of the tray 360 may be provided with a first annular wall 361 extending upwardly. The bottom of first cartridge 210 may be inserted into first annular wall 361. So set up, first filter core 210's installation is comparatively convenient with the dismantlement, uses and experiences betterly.

The middle of the tray 360 may be provided with a second annular wall 362 extending upward. The bottom of the second liner tube 420 may be inserted into the second annular wall 362. So set up, bushing pipe 420's in the second installation and dismantlement are comparatively convenient, and use experience is better.

The first annular wall 361 may surround the second annular wall 362 coaxially or non-coaxially. The bottom of the first cartridge 210 can be inserted between the first annular wall 361 and the second annular wall 362.

Illustratively, the lower portion of the filter case 300 may be provided with a through-hole 340. The bottom surface of the tray 360 may be provided with a drainage port 380. The gully 380 may be inserted into the through hole 340. The drain 380 may be in communication between the second cartridge and the outlet 302. With such an arrangement, the connection structure between the second liner pipe 420 and the filter housing 300 is simple, and the manufacturing cost is low. Moreover, the through holes 340 can also play a role in positioning, so as to ensure that the position of the tray 360 is relatively fixed, thereby ensuring that the batch consistency of the filter element assembly 100 is better.

Illustratively, the filter housing 300 may have a top cover 370. The top cover 370 may be disposed on top within the filter housing 300. The edge of the top cover 370 may be extended downward with a third annular wall 371. The top of the first cartridge 210 can be inserted into the third annular wall 371. So set up, the installation and the dismantlement of first filter core 210 are comparatively convenient, and use experience is better.

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.

For convenience of description, relative terms of regions such as "over 8230; \8230" "," ' over 8230; "\8230;", "' over 8230;", \8230;, "' over 8230" "," "over surface", "over", etc. may be used herein to describe the regional positional relationship of one or more components or features to other components or features as illustrated in the figures. It is understood that relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations 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 terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; 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 accompanying drawings 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 (10)

1. A filter cartridge assembly, comprising:

the filter shell is provided with a water inlet and a water outlet;

the first filter element is arranged in the filter shell, the bottom of the first filter element is abutted against the bottom in the filter shell, the top of the first filter element is abutted against the top in the filter shell, and the outer side surface of the first filter element is communicated with the water inlet; and

the inner lining pipe is arranged in the first filter element and is spaced from the inner side face of the first filter element, the bottom of the inner lining pipe is abutted against the bottom in the filter shell, a gap is formed between the top of the inner lining pipe and the top in the filter shell, and the inner side face of the first filter element is communicated with the water outlet through the gap.

2. The filter element assembly according to claim 1, further comprising a second filter element disposed within said inner liner, said second filter element communicating between said aperture and said water outlet.

3. The filter element assembly of claim 2, wherein the liner tube comprises a first liner tube and a second liner tube, a bottom of the second liner tube abutting a bottom within the filter housing, a top of the second liner tube connected to the bottom of the first liner tube, the gap disposed between the top of the first liner tube and the top within the filter housing, a second filter element disposed within the second liner tube.

4. The filter element assembly according to claim 3, wherein the top of said second liner tube is plugged to the bottom of said first liner tube.

5. The filter element assembly according to claim 3, wherein a tray is provided at the bottom inside said filter housing, wherein

The edge of the tray is provided with a first annular wall extending upwards, and the bottom of the first filter element is inserted into the first annular wall; and/or

The middle part of the tray is provided with a second annular wall extending upwards, and the bottom of the second lining pipe is inserted into the second annular wall.

6. The filter element assembly according to claim 5, wherein the lower portion of said filter housing is provided with a through hole, and the bottom surface of said tray is provided with a water passing port inserted into said through hole, said water passing port communicating between said second filter element and said water outlet.

7. The filter element assembly of claim 2, wherein said second filter element has a water filter and a gas filter.

8. The filter element assembly according to claim 1,

the water inlet and the water outlet are positioned at the lower part of the filter shell; and/or

The flow area of the gap is smaller than the flow area of other parts in the filter shell.

9. The filter element assembly according to claim 1,

a flange is arranged at the top of the outer side surface of the lining pipe and is abutted against the inner side surface of the first filter element; and/or

The top in straining the shell is provided with the top cap, the edge downwardly extending of top cap has the third annular wall, the top of first filter core inserts to the third annular wall.

10. A desktop water purifier, comprising:

a water inlet joint and a water outlet joint; and

the filter element assembly of any one of claims 1-9, the water inlet joint being connected to the water inlet, the water outlet joint being connected to the water outlet.

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