CN211111387U - Filter element assembly and ultrafiltration water purifier - Google Patents

Abstract

The utility model relates to a filter element group spare and ultrafiltration water purifier, filter element group spare include filter flask, milipore filter unit, second grade ultrafiltration unit and carbon-point, first cavity and second cavity are cut apart into to the cavity that the filter flask formed, milipore filter unit detachably installs in the first cavity, be used for to getting into water in the first cavity filters, second grade ultrafiltration unit is the loop configuration, second grade ultrafiltration unit sets up in the second cavity, second grade ultrafiltration unit produce the mouth of a river with the delivery port of second cavity switches on, the carbon-point is inserted and is established in the second grade ultrafiltration unit, be equipped with water inlet path in the carbon-point, water inlet path with the water inlet correspondence of second cavity switches on. The water quality safety requirement is met, the service life is prolonged, and the cost is reduced.

Description

Filter element assembly and ultrafiltration water purifier

Technical Field

The utility model relates to a water purification field especially relates to a filter element group spare and ultrafiltration water purifier.

Background

In order to ensure that the water quality meets the requirement of sanitary safety, the mouth feel needs to be improved in addition to the need of filtering silt, suspended particles and bacterial impurities in the water, so as to meet the consumption requirement. To meet the above demanding requirements, multi-stage filtration, for example, using filter elements such as PP cotton and carbon rods, may be required. Along with the continuous development of science and technology, the water purifier constantly tends to the miniaturization, with the filter core integration at different levels together to reduce the volume of whole water purifier. However, the water purifier with too high integration level has the problems of high filter element replacement cost and short service life.

SUMMERY OF THE UTILITY MODEL

Based on the above, there is a need for a filter element assembly and an ultrafiltration water purifier, which can meet the requirement of water quality safety, and at the same time, can prolong the service life and reduce the cost.

The utility model provides a filter element subassembly, includes filter flask, milipore filter unit, second grade milipore filter unit and carbon-point, first cavity and second cavity are split into to the cavity that the filter flask formed, milipore filter unit detachably installs in the first cavity, be used for to getting into water in the first cavity filters, second grade milipore filter unit is the loop configuration, second grade milipore filter unit sets up in the second cavity, second grade milipore filter unit's the mouth of producing the mouth of a river with the delivery port of second cavity switches on, the carbon-point is inserted and is established in the second grade milipore filter unit, be equipped with water inlet passage in the carbon-point, water inlet passage with the water inlet correspondence of second cavity switches on.

Above-mentioned scheme provides a filter element group spare be provided with in the first cavity milipore filter unit for to getting into the water of filter element group spare carries out the primary filtration, and the water after the filtration reentries carry out the secondary filter in the second cavity. Specifically, the secondary filtration process is completed by a secondary ultrafiltration unit and a carbon rod in the second cavity. And water obtained by filtering in the ultrafiltration membrane unit enters the water inlet passage from the water inlet of the second cavity, is sequentially filtered by the carbon rod and the secondary ultrafiltration unit, and is finally discharged from the water outlet of the secondary ultrafiltration unit and the water outlet of the second cavity. The carbon rod can adsorb and remove residual chlorine, peculiar smell, part of micromolecular organic matters and the like in water, and effectively improves the taste of drinking water. And the secondary ultrafiltration unit can further filter the water filtered by the carbon rod, intercept bacteria and viruses possibly bred in the water and ensure that the water quality meets the requirement of sanitary safety. Based on the primary filtration process by the milipore filter unit goes on, can filter less impurity to it is right secondary ultrafiltration unit and carbon-point carry out certain degree of protection, reduce the filtration burden of secondary ultrafiltration unit and carbon-point, increase of service life. The ultrafiltration membrane unit for primary filtration is detachably arranged in the first cavity, so that the ultrafiltration membrane unit can be cleaned after being used for a period of time and can be reused. Thereby prolonging the service life of the filter element assembly as a whole and reducing the cost.

In one embodiment, a partition plate is arranged in the filter bottle and divides a cavity formed by the filter bottle into the first cavity and the second cavity, one end of the carbon rod is in press sealing with the partition plate, the other end of the carbon rod is in press sealing with the filter bottle, the secondary ultrafiltration unit comprises a secondary ultrafiltration membrane, and an inner shell and an outer shell which are both cylindrical, the outer shell is sleeved outside the inner shell, the secondary ultrafiltration membrane is located between the inner shell and the outer shell, the inner shell is sleeved outside the carbon rod, a water passing gap is formed between one end of the inner shell close to the partition plate and the partition plate at intervals, and one end of the inner shell far away from the partition plate is in a sealing state with the carbon rod.

In one embodiment, the outer shell is provided with a secondary water through hole, one end of the outer shell is abutted to the partition plate, and the other end of the outer shell is abutted to the end face of the filter flask through ribs.

In one embodiment, a first end cover and a second end cover are respectively arranged at two ends of the carbon rod, the first end cover is arranged at one end, close to the partition plate, of the carbon rod, the second end cover is arranged at one end, far away from the partition plate, of the carbon rod, a water inlet through hole is formed in the second end cover, a water inlet of the second cavity is arranged on the filter bottle, and the water inlet through hole is communicated between the water inlet passage and the water inlet of the second cavity.

In one embodiment, a through hole is formed in the partition plate, and the through hole is communicated with a water producing port of the ultrafiltration membrane unit and the water inlet passage.

In one embodiment, a partition plate is arranged in the filter flask, the partition plate divides a cavity formed by the filter flask into the first cavity and the second cavity, the ultrafiltration membrane unit comprises an ultrafiltration membrane and an ultrafiltration membrane shell, the ultrafiltration membrane is installed in the ultrafiltration membrane shell, two ends of the ultrafiltration membrane shell are respectively supported and pressed between the partition plate and the filter flask, the side wall of the ultrafiltration membrane shell and the filter flask are arranged at intervals to form a first water inlet gap communicated with a water inlet of the first cavity, a water passing hole communicated with the first water inlet gap is formed in the side wall of the ultrafiltration membrane shell, and a water outlet of the ultrafiltration membrane shell is communicated with a water outlet of the first cavity.

In one embodiment, the water inlet of the first cavity and the water outlet of the first cavity are both arranged on the filter flask, the part of the ultrafiltration membrane shell, which is pressed against the partition plate, is a bottom wall, and an auxiliary water passing hole is formed in a corner where the bottom wall of the ultrafiltration membrane shell is connected with the side wall.

In one embodiment, the auxiliary water through holes are a plurality of auxiliary water through holes which are distributed at intervals in the circumferential direction of the ultrafiltration membrane shell, and the auxiliary water through holes are arched water inlet holes.

In one embodiment, the filter bottle comprises a first shell and a second shell, the first shell is used for forming the first cavity, the second shell is used for forming the second cavity, and the first shell is detachably connected with the second shell.

In one embodiment, the filter bottle comprises a bottle body and a bottle cap, the secondary ultrafiltration unit and the ultrafiltration membrane unit are sequentially arranged in the bottle body, the bottle cap is positioned on one side of the ultrafiltration membrane unit far away from the secondary ultrafiltration unit, and the bottle cap is detachably arranged on the bottle body.

An ultrafiltration water purifier is characterized by comprising the filter element assembly.

The above scheme provides an ultrafiltration water purifier, through set up the filter element subassembly in any above-mentioned embodiment wherein, under ultrafiltration membrane unit, carbon-point and the filtration in proper order of second grade ultrafiltration unit for quality of water satisfies the sanitary safety requirement. Meanwhile, smaller impurities are filtered by the ultrafiltration membrane unit before the carbon rod and the secondary ultrafiltration unit, so that the carbon rod and the secondary ultrafiltration unit are protected, and the service life of the carbon rod and the secondary ultrafiltration unit is prolonged. After filtering for a period of time, the ultrafiltration membrane unit can be removed for cleaning and then reused. Thereby prolonging the service life of the ultrafiltration water purifier on the whole and reducing the cost.

Drawings

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

Description of reference numerals:

10. a filter element assembly; 11. a filter flask; 111. a first cavity; 112. a second cavity; 113. a first housing; 114. a second housing; 12. an ultrafiltration membrane unit; 121. ultrafiltration membranes; 122. an ultrafiltration membrane housing; 1221. a first water intake gap; 1222. water passing holes; 1223. auxiliary water through holes; 13. a secondary ultrafiltration unit; 131. a second-stage ultrafiltration membrane; 132. an inner shell; 1321. a water gap; 133. an outer shell; 1331. a secondary water through hole; 14. a carbon rod; 141. a water inlet passage; 15. a partition plate; 16. a second end cap; 161. a water inlet through hole; 17. and (4) ribs.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" 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," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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.

As shown in FIG. 1, in one embodiment, a filter cartridge assembly 10 is provided comprising a filter flask 11, an ultrafiltration membrane unit 12, a secondary ultrafiltration unit 13, and a carbon rod 14. The cavity formed by the filter bottle 11 is divided into a first cavity 111 and a second cavity 112, and the ultrafiltration membrane unit 12 is detachably installed in the first cavity 111 and is used for filtering water entering the first cavity 111. The secondary ultrafiltration unit 13 and the carbon rod 14 are both arranged in the second cavity 112 and are used for performing secondary filtration on the water filtered by the ultrafiltration membrane unit 12 and discharged from the first cavity 111.

Second grade ultrafiltration unit 13 is the loop configuration, second grade ultrafiltration unit 13 sets up in the second cavity 112, second grade ultrafiltration unit 13 produce the mouth of a river with the delivery port of second cavity 112 switches on, carbon-point 14 inserts and establishes in the second grade ultrafiltration unit 13, be equipped with inhalant canal 141 in the carbon-point 14, inhalant canal 141 with the water inlet of second cavity 112 corresponds switches on.

According to the filter element assembly 10 provided by the scheme, the ultrafiltration membrane unit 12 is arranged in the first cavity 111 and used for performing primary filtration on water entering the filter element assembly 10, and the filtered water enters the second cavity 112 again for secondary filtration. In particular, the secondary filtering process is completed by the secondary ultrafiltration unit 13 and the carbon rod 14 in the second cavity 112. The water obtained by filtering in the ultrafiltration membrane unit 12 enters the water inlet passage 141 from the water inlet of the second cavity 112, is then sequentially filtered by the carbon rod 14 and the secondary ultrafiltration unit 13, and is finally sequentially discharged from the water outlet of the secondary ultrafiltration unit 13 and the water outlet of the second cavity 112. The carbon rod 14 can adsorb and remove residual chlorine, peculiar smell, part of micromolecular organic matters and the like in water, and effectively improves the taste of drinking water. And the secondary ultrafiltration unit 13 can further filter the water filtered by the carbon rod 14, and intercept bacteria and viruses which may be bred in the water, so that the water quality meets the requirement of sanitation and safety.

Based on the primary filtration process by ultrafiltration membrane unit 12 goes on, can filter the impurity that the particle size is not less than 0.1um for the impurity that the diameter is not less than 0.1um is intercepted and can't pass through ultrafiltration membrane unit 12, thereby it is right second grade ultrafiltration unit 13 and carbon-point 14 carry out the protection of certain degree, reduce second grade ultrafiltration unit 13 and carbon-point 14's filtration burden, increase of service life. And the ultrafiltration membrane unit 12 for primary filtration is detachably installed in the first chamber 111, so that it can be cleaned after a period of use and reused. Thereby extending the useful life of the filter element assembly 10 as a whole and reducing costs.

Specifically, in one embodiment, as shown in fig. 1, a partition 15 may be disposed in the filter flask 11 to divide the cavity formed by the filter flask 11 into a first cavity 111 and a second cavity 112.

Further, in one embodiment, as shown in fig. 1, when a partition 15 is provided in the filter bottle 11, one end of the carbon rod 14 may be pressed against the partition 15 for sealing, and the other end of the carbon rod 14 is pressed against the filter bottle 11 for sealing. It should be noted that, although both ends of the carbon rod 14 are respectively pressed and sealed with the partition 15 and the filter bottle 11, the communication between the water inlet passage 141 in the carbon rod 14 and the water inlet of the second cavity 112 is not affected.

Specifically, in one embodiment, if the partition 15 is provided with a through hole, the through hole communicates the water producing port of the ultrafiltration membrane unit 12 with the water inlet passage 141. Even though the end face of the carbon rod 14 is press-sealed against the partition 15, the water inlet passage 141 corresponds to a through hole in the partition 15, so that the water filtered by the ultrafiltration membrane unit 12 in the first cavity 111 can enter the water inlet passage 141 through the through hole. At this time, for the first cavity 111, the through hole is a water outlet of the first cavity 111; for the second cavity 112, the through hole is a water inlet of the second cavity 112.

Or, in an embodiment, as shown in fig. 1, the water inlet of the second cavity 112 is disposed on the filter bottle 11, the end surface of the carbon rod 14 may directly abut against and seal the filter bottle 11, and the water inlet passage 141 is correspondingly communicated with the water inlet of the second cavity 112.

Alternatively, in one embodiment, as shown in fig. 1, a first end cap and a second end cap 16 are respectively disposed at two ends of the carbon rod 14, the first end cap is disposed at one end of the carbon rod 14 close to the partition 15, and the second end cap 16 is disposed at one end of the carbon rod 14 far from the partition 15.

Be equipped with inlet opening 161 on the second end cover 16, the water inlet setting of second cavity 112 is in on the filter flask 11, inlet opening 161 intercommunication is in inhalant canal 141 with between the water inlet of second cavity 112. The water inlet through hole 161 is communicated with the water inlet of the second cavity 112 through the water inlet through hole 161. The water entering from the water inlet of the second cavity 112 can only enter the water inlet passage 141 of the carbon rod 14 under the conduction of the water inlet through hole 161, and then is filtered by the carbon rod 14 and the secondary ultrafiltration unit 13 in sequence.

Further, in one embodiment, as shown in fig. 1, the secondary ultrafiltration unit 13 comprises a secondary ultrafiltration membrane 131 and an inner shell 132 and an outer shell 133, both of which are cylindrical. The outer casing 133 cover is established outside the inner casing 132, second grade milipore filter 131 is located inner casing 132 with between the outer casing 133, inner casing 132 cover is established outside the carbon-point 14, be close to on the inner casing 132 the one end of baffle 15 with the 15 intervals of baffle form away water clearance 1321, keep away from on the inner casing 132 the one end of baffle 15 with be sealing state between the carbon-point 14.

So that the water filtered by the carbon rod 14 can only enter the secondary ultrafiltration unit 13 from the water gap 1321 at the end of the inner shell 132 close to the partition 15 because the end of the inner shell 132 far from the partition 15 is in a sealed state with the carbon rod 14 after reaching the gap between the carbon rod 14 and the inner shell 132. When the filter element assembly 10 is installed at an angle as shown in fig. 1, the water filtered by the carbon rod 14 can be further filtered by the secondary ultrafiltration unit 13 only after the water level reaches the water passing gap 1321, thereby ensuring that the carbon rod 14 participates in the filtration process as much as possible.

Further, in one embodiment, as shown in fig. 1, a secondary water through hole 1331 is provided on the outer shell 133, one end of the outer shell 133 abuts against the partition 15, and the other end of the outer shell 133 abuts against the end surface of the filter flask 11 through a rib 17.

So that the secondary ultrafiltration unit 13 can be suspended in the second cavity 112, and a gap is formed between the lower part of the secondary ultrafiltration unit 13 and the filter flask 11, so that the filtered water of the secondary ultrafiltration unit 13 can be smoothly discharged. The secondary water holes 1331 formed in the outer shell 133 facilitate the discharge of gas in the secondary ultrafiltration unit 13, thereby avoiding the occurrence of suffocation.

Further, in one embodiment, the ultrafiltration membrane unit 12 includes an ultrafiltration membrane 121 and an ultrafiltration membrane housing 122, the ultrafiltration membrane 121 is installed in the ultrafiltration membrane housing 122, and two ends of the ultrafiltration membrane housing 122 are respectively supported and pressed between the partition 15 and the filter bottle 11. Thereby ensuring that the ultrafiltration membrane 121 is located in the second chamber 112 and does not fall out.

And further, as shown in fig. 1, in one embodiment, the sidewall of the ultrafiltration membrane housing 122 is spaced from the filter flask 11 to form a first water inlet gap 1221 communicated with the water inlet of the first cavity 111. A water through hole 1222 communicated with the first water inlet gap 1221 is formed in the side wall of the ultrafiltration membrane shell 122, and a water outlet of the ultrafiltration membrane shell 122 is communicated with a water outlet of the first cavity 111.

During water purification, water entering from the water inlet of the first cavity 111 sequentially enters the ultrafiltration membrane housing 122 through the first water inlet gap 1221 and the water through holes 1222, and water filtered by the ultrafiltration membrane 121 sequentially flows out of the first cavity 111 from the water outlet of the ultrafiltration membrane housing 122 and the water outlet of the first cavity 111.

Further, as shown in fig. 1, in an embodiment, the water inlet of the first cavity 111 and the water outlet of the first cavity 111 are both disposed on the filter bottle 11, and the water outlet of the ultrafiltration membrane housing 122 is located at a position pressed against the filter bottle 11. The part of the ultrafiltration membrane shell 122, which is pressed against the partition plate 15, is a bottom wall, and an auxiliary water through hole 1223 is arranged at a corner where the bottom wall and the side wall of the ultrafiltration membrane shell 122 are connected.

In order to prevent the ultrafiltration membrane 121 from falling off, after the ultrafiltration membrane housing 122 is pressed between the filter bottle 11 and the partition plate 15, although the water through hole 1222 is formed in the side wall of the ultrafiltration membrane housing 122 for allowing the water in the first water inlet gap 1221 to enter the ultrafiltration membrane housing 122 for filtering, in order to further increase the water inflow of the ultrafiltration membrane unit 12, the auxiliary water through hole 1223 is formed at a corner between the bottom wall and the side wall of the ultrafiltration membrane housing 122, so that the water inflow of the ultrafiltration membrane housing 122 is increased.

More specifically, as shown in fig. 1, in one embodiment, the auxiliary water through holes 1223 are plural, and the plural auxiliary water through holes 1223 are spaced apart from each other in the circumferential direction of the ultrafiltration membrane housing 122. The water quantity entering the ultrafiltration membrane shell 122 at each angle is ensured to be balanced, and the filtering effect of the ultrafiltration membrane 121 is improved.

Specifically, as shown in fig. 1, in one embodiment, the auxiliary water holes 1223 are arched water inlet holes.

Of course, alternatively, the auxiliary water through hole 1223 may be a water inlet hole with other shapes, and is not limited in particular. However, the arched water inlet hole can enlarge the gap between the ultrafiltration membrane housing 122 and the partition plate 15, and enlarge the flow rate.

Further, in one embodiment, as shown in fig. 1, the filter bottle 11 includes a first housing 113 and a second housing 114, a portion for forming the first cavity 111 is the first housing 113, a portion for forming the second cavity 112 is the second housing 114, and the first housing 113 is detachably connected to the second housing 114.

Here, although the portion forming the first cavity 111 is the first housing 113, the first cavity 111 is not surrounded by only the first housing 113. For example, when the partition 15 is provided, the first cavity 111 is defined by the first housing 113 and the partition 15. Similarly, the second housing 114 is similar to the first housing 113, and the second cavity 112 is not enclosed by the second housing 114. The portion for forming the second cavity 112 is the second shell 114 based on the portion for forming the first cavity 111 being the first shell 113. Therefore, when the first housing 113 and the second housing 114 are detached, the ultrafiltration membrane unit 12 in the first chamber 111 can be exposed, and then the ultrafiltration membrane unit 12 can be detached, so that it can be cleaned.

That is, when the ultrafiltration membrane unit 12 needs to be detached for cleaning, the first housing 113 and the second housing 114 are detached so that the ultrafiltration membrane unit 12 in the first cavity 111 is exposed, and the ultrafiltration membrane unit 12 is detached for cleaning for reuse.

Optionally, in an embodiment, the filter bottle 11 includes a bottle body in which the secondary ultrafiltration unit 13 and the ultrafiltration membrane unit 12 are sequentially installed, and a bottle cap on a side of the ultrafiltration membrane unit 12 away from the secondary ultrafiltration unit 13, the bottle cap being detachably installed on the bottle body.

When the ultrafiltration membrane unit 12 needs to be cleaned, the bottle cap is detached from the bottle body, and then the ultrafiltration membrane unit 12 is taken out of the bottle body and cleaned.

Further, in another embodiment, there is provided an ultrafiltration water purifier characterized by comprising the above-mentioned filter cartridge assembly 10.

The scheme provides an ultrafiltration water purifier, and the filter element assembly 10 in any embodiment is arranged in the ultrafiltration water purifier, so that the water quality meets the requirement of sanitation and safety under the sequential filtration of the ultrafiltration membrane unit 12, the carbon rod 14 and the secondary ultrafiltration unit 13. Meanwhile, impurities with small particle sizes are filtered out by the ultrafiltration membrane unit 12 before the carbon rod 14 and the secondary ultrafiltration unit 13, so that the carbon rod 14 and the secondary ultrafiltration unit 13 are protected, and the service life of the carbon rod is prolonged. After filtration for a period of time, the ultrafiltration membrane unit 12 may be removed for cleaning and then reused. Thereby prolonging the service life of the ultrafiltration water purifier on the whole and reducing the cost.

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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. The utility model provides a filter element subassembly, its characterized in that, includes filter flask, milipore filter unit, second grade milipore filter unit and carbon-point, first cavity and second cavity are cut apart into to the cavity that the filter flask formed, milipore filter unit detachably installs in the first cavity, be used for to getting into water in the first cavity filters, second grade milipore filter unit is the loop configuration, second grade milipore filter unit sets up in the second cavity, second grade milipore filter unit's product mouth of a river with the delivery port of second cavity switches on, the carbon-point is inserted and is established in the second grade milipore filter unit, be equipped with water inlet passage in the carbon-point, water inlet passage with the water inlet correspondence of second cavity switches on.

2. The filter element assembly according to claim 1, wherein a partition is arranged in the filter flask, the partition divides a cavity formed by the filter flask into the first cavity and the second cavity, one end of the carbon rod is in press seal with the partition, the other end of the carbon rod is in press seal with the filter flask, the secondary ultrafiltration unit comprises a secondary ultrafiltration membrane, and an inner shell and an outer shell which are both cylindrical, the outer shell is sleeved outside the inner shell, the secondary ultrafiltration membrane is positioned between the inner shell and the outer shell, the inner shell is sleeved outside the carbon rod, one end of the inner shell close to the partition forms a water passage gap with the partition at an interval, and one end of the inner shell far away from the partition is in a sealed state with the carbon rod.

3. The filter element assembly of claim 2, wherein the outer shell is provided with a secondary water through hole, one end of the outer shell is abutted with the partition plate, and the other end of the outer shell is abutted with the end face of the filter bottle through ribs.

4. The filter element assembly according to claim 2, wherein a first end cap and a second end cap are respectively disposed at two ends of the carbon rod, the first end cap is disposed at one end of the carbon rod close to the partition plate, the second end cap is disposed at one end of the carbon rod far away from the partition plate, a water inlet through hole is disposed on the second end cap, the water inlet of the second cavity is disposed on the filter bottle, and the water inlet through hole is communicated between the water inlet passage and the water inlet of the second cavity.

5. The filter element assembly according to claim 2, wherein the partition plate is provided with a through hole, and the through hole is communicated with the water outlet of the ultrafiltration membrane unit and the water inlet passage.

6. The filter element assembly according to claim 1, wherein a partition is arranged in the filter flask, the partition divides a cavity formed by the filter flask into the first cavity and the second cavity, the ultrafiltration membrane unit comprises an ultrafiltration membrane and an ultrafiltration membrane shell, the ultrafiltration membrane is installed in the ultrafiltration membrane shell, two ends of the ultrafiltration membrane shell are respectively supported and pressed between the partition and the filter flask, a first water inlet gap communicated with the water inlet of the first cavity is formed between the side wall of the ultrafiltration membrane shell and the filter flask at intervals, a water through hole communicated with the first water inlet gap is formed in the side wall of the ultrafiltration membrane shell, and the water outlet of the ultrafiltration membrane shell is communicated with the water outlet of the first cavity.

7. The filter element assembly according to claim 6, wherein the water inlet of the first cavity and the water outlet of the first cavity are both arranged on the filter bottle, the part of the ultrafiltration membrane housing, which is pressed against the partition plate, is a bottom wall, and an auxiliary water through hole is arranged at a corner where the bottom wall and the side wall of the ultrafiltration membrane housing are connected.

8. The filter element assembly according to claim 7, wherein the auxiliary water through holes are a plurality of auxiliary water through holes which are distributed at intervals in the circumferential direction of the ultrafiltration membrane shell, and the auxiliary water through holes are arched water inlet holes.

9. The filter element assembly according to any one of claims 1 to 8, wherein the filter flask comprises a first housing and a second housing, the part for forming the first cavity is the first housing, the part for forming the second cavity is the second housing, and the first housing is detachably connected with the second housing.

10. The filter element assembly according to any one of claims 1 to 8, wherein the filter flask comprises a flask body in which the secondary ultrafiltration unit and the ultrafiltration membrane unit are mounted in sequence, and a flask cap on a side of the ultrafiltration membrane unit remote from the secondary ultrafiltration unit, the flask cap being detachably mounted on the flask body.

11. An ultrafiltration water purifier, characterized by comprising the filter element assembly of any one of claims 1 to 10.

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