CN110734156A

CN110734156A - Filter element assembly and ultrafiltration water purifier

Info

Publication number: CN110734156A
Application number: CN201911156318.8A
Authority: CN
Inventors: 李海妃; 李友铃
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-01-31

Abstract

The invention relates to filter element assemblies and an ultrafiltration water purifier, wherein each filter element assembly comprises a filter bottle, an ultrafiltration membrane unit, a second-stage ultrafiltration unit and a carbon rod, a cavity formed by the filter bottle is divided into a th cavity and a second cavity, the ultrafiltration membrane unit is detachably arranged in the th cavity and is used for filtering water entering the th cavity, the second-stage ultrafiltration unit is of an annular structure and is arranged in the second cavity, a water outlet of the second-stage ultrafiltration unit is communicated with a water outlet of the second cavity, the carbon rod is inserted in the second-stage ultrafiltration unit, a water inlet passage is arranged in the carbon rod and is correspondingly communicated with a water inlet of the second cavity, the service life is prolonged, and the cost is reduced while the requirement of water quality safety is met.

Description

Filter element assembly and ultrafiltration water purifier

Technical Field

The invention relates to the field of water purification, in particular to filter element assemblies and an ultrafiltration water purifier.

Background

In order to meet the requirements of water quality on sanitation and safety, silt, suspended particles and bacterial impurities in water need to be filtered, and taste needs to be improved to meet consumption requirements.

Disclosure of Invention

Therefore, filter element assemblies and ultrafiltration water purifiers are needed, and the service life is prolonged and the cost is reduced while the water quality safety requirement is met.

kinds of filter element group spare, including filter flask, milipore filter unit, second grade milipore filter unit and carbon-point, the cavity that the filter flask formed is split into cavity and second cavity, milipore filter unit detachably installs in the cavity, be used for to the entering water in the 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.

The above solution provides filter element assemblies, wherein the ultrafiltration membrane unit is disposed in the th cavity and is used for stages of filtration of water entering the filter element assembly, the filtered water enters the second cavity again for secondary filtration, and the secondary filtration process is completed by the secondary ultrafiltration unit and the carbon rod in the second cavity, the water obtained by filtration in the ultrafiltration membrane unit enters the water inlet passage from the water inlet of the second cavity, is then sequentially filtered by the carbon rod and the secondary ultrafiltration unit, and finally is discharged from the water outlet of the secondary ultrafiltration unit and the water outlet of the second cavity.

In embodiments, a partition plate is arranged in the filter bottle, the partition plate divides a cavity formed by the filter bottle into the th cavity and the second cavity, the end of the carbon rod is in press seal with the partition plate, the other end of the carbon rod is in press seal 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 the end of the inner shell close to the partition plate and the partition plate at an interval, and a end of the inner shell far away from the partition plate and the carbon rod are in a sealed state.

In embodiments, the outer shell is provided with a secondary water through hole, the end of the outer shell abuts against the partition plate, and the other end of the outer shell abuts against the end face of the filter bottle through ribs.

In embodiments, both ends of the carbon rod are respectively provided with a end cap and a second end cap, the end cap is arranged on the carbon rod close to the end of the partition plate, the second end cap is arranged on the carbon rod far away from the end of the partition plate, the second end cap is provided with a water inlet through hole, the 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 embodiments, the partition plate is provided with a through hole which is communicated with the water producing port and the water inlet passage of the ultrafiltration membrane unit.

In embodiments, be equipped with the baffle in the filter flask, the baffle will the cavity that the filter flask formed is cut apart into the cavity with the second cavity, the milipore filter unit includes milipore filter and milipore filter casing, the milipore filter is installed in the milipore filter casing, the both ends of milipore filter casing support respectively to support to press in the baffle with between the filter flask, the lateral wall of milipore filter casing with interval setting between the filter flask, form with the of cavity water inlet clearance that the water inlet switched on, be equipped with on the lateral wall of milipore filter casing with the water hole of crossing of water inlet clearance intercommunication, the delivery port of milipore filter casing with the delivery port intercommunication of cavity.

In embodiments, the water inlet of the cavity and the water outlet of the cavity are both arranged on the filter bottle, the part of the ultrafiltration membrane shell 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 embodiments, the auxiliary water through holes are multiple and distributed at intervals in the circumferential direction of the ultrafiltration membrane shell, and the auxiliary water through holes are arched water inlet holes.

In embodiments, the filter bottle comprises a housing and a second housing, the part for forming the th cavity is a housing, the part for forming the second cavity is a second housing, and the th housing is detachably connected with the second housing.

In of the embodiments, the filter flask comprises a flask body in which the secondary ultrafiltration unit and the ultrafiltration membrane unit are sequentially installed, and a flask cap located on the side of the ultrafiltration membrane unit remote from the secondary ultrafiltration unit, the flask cap being detachably installed on the flask body.

an ultrafiltration water purifier, characterized by comprising the filter element component.

The above scheme provides ultrafiltration water purifiers, which can meet the requirement of sanitary safety under the sequential filtration of the ultrafiltration membrane unit, the carbon rod and the secondary ultrafiltration unit by arranging the filter element assembly in any embodiment, meanwhile, the carbon rod and the secondary ultrafiltration unit are protected by filtering smaller impurities by the ultrafiltration membrane unit before the carbon rod and the secondary ultrafiltration unit, and the service life of the carbon rod and the secondary ultrafiltration unit is prolonged, and after periods of filtration, the ultrafiltration membrane unit can be detached for cleaning and then reused, so that the service life of the ultrafiltration water purifier is prolonged as a whole, and the cost is reduced.

Drawings

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

Description of reference numerals:

10. the filter element assembly comprises 11 filter bottles, 111 a th cavity, 112 a second cavity, 113 a th shell, 114 a second shell, 12 an ultrafiltration membrane unit, 121 an ultrafiltration membrane, 122 an ultrafiltration membrane shell, 1221 a th water inlet gap, 1222 a water through hole, 1223 an auxiliary water through hole, 13 a secondary ultrafiltration unit, 131 a secondary ultrafiltration membrane, 132 a inner shell, 1321 a water outlet 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 cover, 161 a water inlet through hole, 17 a rib.

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, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It is noted that when an element is referred to as being "secured to" another elements, it can be directly on the other elements or intervening elements may also be present, that when elements are referred to as being "connected" to another elements, it can be directly connected to another elements or intervening elements may be present.

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.

In exemplary embodiments, as shown in fig. 1, kinds of filter cartridge assemblies 10 are provided, including a filter bottle 11, an ultrafiltration membrane unit 12, a secondary ultrafiltration unit 13 and a carbon rod 14, wherein the filter bottle 11 is divided into a th chamber 111 and a second chamber 112, the ultrafiltration membrane unit 12 is detachably installed in the th chamber 111 for filtering water entering the th chamber 111, and the secondary ultrafiltration unit 13 and the carbon rod 14 are both disposed in the second chamber 112 for secondary filtering of water filtered by the ultrafiltration membrane unit 12 and discharged from the th chamber 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.

In the filter element assembly 10 provided by the above scheme, the ultrafiltration membrane unit 12 is arranged in the th cavity 111 and is used for performing -stage filtration on water entering the filter element assembly 10, and the filtered water enters the second cavity 112 again for performing secondary filtration, specifically, the secondary filtration process is completed by the secondary ultrafiltration unit 13 and the carbon rod 14 in the second cavity 112, the water obtained by filtration 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 finally is 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, partial small molecular organic matters and the like in the water, so that the drinking water taste is effectively improved, while the secondary ultrafiltration unit 13 can perform -step filtration on the water filtered by the carbon rod 14, so that bacteria and viruses possibly bred in the water can be intercepted, and the water quality meets the sanitary safety requirements.

The -grade filtration process is carried out by the ultrafiltration membrane unit 12, impurities with the particle size not less than 0.1um can be filtered, so that the impurities with the diameter not less than 0.1um are intercepted and can not pass through the ultrafiltration membrane unit 12, the secondary ultrafiltration unit 13 and the carbon rod 14 are protected to degree, the filtration burden of the secondary ultrafiltration unit 13 and the carbon rod 14 is reduced, the service life is prolonged, and the -grade filtration ultrafiltration membrane unit 12 is detachably arranged in the cavity 111, so that the ultrafiltration membrane unit can be cleaned and reused after periods of time, thereby prolonging the service life of the filter element assembly 10 as a whole and reducing the cost.

Specifically, in embodiments, 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 cavity 111 and a second cavity 112.

furthermore, in embodiments, as shown in fig. 1, when the filter bottle 11 is provided with a partition 15, the end of the carbon rod 14 can 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 the two ends of the carbon rod 14 are respectively pressed against 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 embodiments, if a through hole is provided on the partition 15, the through hole communicates the water producing port of the ultrafiltration membrane unit 12 with the water inlet path 141, that is, the end surface of the carbon rod 14 is pressed against the partition 15, but the water inlet path 141 corresponds to the through hole on the partition 15, so that the water filtered by the ultrafiltration membrane unit 12 in the cavity 111 can enter the water inlet path 141 through the through hole, at this time, for the cavity 111, the through hole is the water outlet of the cavity 111, and for the second cavity 112, the through hole is the water inlet of the second cavity 112.

Or, in embodiments, 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 with the filter bottle 11, and the water inlet passage 141 is correspondingly communicated with the water inlet of the second cavity 112.

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

, in embodiments, as shown in fig. 1, the secondary ultrafiltration unit 13 includes a secondary ultrafiltration membrane 131, and an inner shell 132 and an outer shell 133 both in a cylindrical shape, the outer shell 133 is sleeved outside the inner shell 132, the secondary ultrafiltration membrane 131 is located between the inner shell 132 and the outer shell 133, the inner shell 132 is sleeved outside the carbon rod 14, a end of the inner shell 132 close to the partition 15 is spaced from the partition 15 to form a water gap 1321, and a end of the inner shell 132 far from the partition 15 is sealed with the carbon rod 14.

Therefore, after the water filtered by the carbon rod 14 reaches the gap between the carbon rod 14 and the inner shell 132, the water can only enter the secondary ultrafiltration unit 13 from the water-passing gap 1321 on the inner shell 132 close to the end of the partition 15 based on the sealing state between the end of the inner shell 132 far away from the partition 15 and the carbon rod 14, when the filter element assembly 10 is installed at the angle shown in fig. 1, the water filtered by the carbon rod 14 can only enter steps to be filtered by the secondary ultrafiltration unit 13 after reaching the water-passing gap 1321, and the carbon rod 14 is ensured to participate in the filtering process as much as possible.

furthermore, in embodiments, as shown in fig. 1, the outer shell 133 is provided with a secondary water through hole 1331, the end of the outer shell 133 abuts against the partition 15, and the other end of the outer shell 133 abuts against the end face 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.

, in embodiments, the ultrafiltration membrane unit 12 comprises an ultrafiltration membrane 121 and an ultrafiltration membrane housing 122, wherein 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, so as to ensure that the ultrafiltration membrane 121 is located in the second cavity 112 and cannot fall down.

steps, as shown in fig. 1, in embodiments, the sidewall of the ultrafiltration membrane housing 122 is spaced from the filter flask 11 to form a th inlet gap 1221 communicated with the inlet of the th cavity 111, a water through hole 1222 communicated with the th inlet gap 1221 is formed in the sidewall of the ultrafiltration membrane housing 122, and the outlet of the ultrafiltration membrane housing 122 is communicated with the outlet of the th cavity 111.

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

, as shown in fig. 1, in embodiments, the water inlet of the th cavity 111 and the water outlet of the th 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, a part of the ultrafiltration membrane housing 122 pressed against the partition 15 is a bottom wall, and an auxiliary water through hole 1223 is disposed at a corner where the bottom wall and the side wall of the ultrafiltration membrane housing 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 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 th 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 in step , the auxiliary water through hole 1223 is formed at the 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.

specifically, as shown in fig. 1, in embodiments, there are a plurality of auxiliary water through holes 1223, and the plurality of auxiliary water through holes 1223 are distributed at intervals in the circumferential direction of the ultrafiltration membrane housing 122, so that the water amount entering the ultrafiltration membrane housing 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 embodiments, 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.

, in embodiments, as shown in fig. 1, the filter bottle 11 includes a th case 113 and a second case 114, a portion for forming the th cavity 111 is the th case 113, a portion for forming the second cavity 112 is the second case 114, and the th case 113 is detachably connected to the second case 114.

It should be noted that although the part forming the th cavity 111 is the th shell 113, the 0 th cavity 111 is not surrounded by only the th shell 113, for example, when the partition 15 is provided as described above, the th cavity 111 is surrounded by the th shell 113 and the partition 15, similarly, the second shell 114 is similar to the th shell 113, and the second cavity 112 is not surrounded by only the second shell 114, since the part forming the th cavity 111 is the th shell 113 and the part forming the second cavity 112 is the second shell 114, therefore, when the th shell 113 and the second shell 114 are detached, the ultrafiltration membrane unit 12 in the th cavity 111 can be exposed, and then the ultrafiltration membrane unit 12 can be detached, so that the ultrafiltration membrane unit 12 can be cleaned.

That is, when the ultrafiltration membrane unit 12 needs to be detached for cleaning, the th case 113 and the second case 114 are detached to expose the ultrafiltration membrane unit 12 in the th chamber 111, so that the ultrafiltration membrane unit 12 is detached for cleaning for reuse.

Optionally, in embodiments, the filter flask 11 comprises a flask body in which the secondary ultrafiltration unit 13 and the ultrafiltration membrane unit 12 are sequentially installed, and a bottle cap on the side of the ultrafiltration membrane unit 12 remote from the secondary ultrafiltration unit 13, the bottle cap being detachably installed on the flask 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.

in another embodiments, there are ultrafiltration water purifiers that include the cartridge assembly 10 described above.

The above scheme provides ultrafiltration water purifiers, which can meet the requirement of sanitary safety under the sequential filtration of the ultrafiltration membrane unit 12, the carbon rod 14 and the secondary ultrafiltration unit 13 by arranging the filter element assembly 10 in any embodiment, meanwhile, the carbon rod 14 and the secondary ultrafiltration unit 13 are protected by filtering impurities with smaller particle size by the ultrafiltration membrane unit 12 before the carbon rod 14 and the secondary ultrafiltration unit 13, and the service life of the carbon rod 14 and the secondary ultrafiltration unit 13 is prolonged, and after periods of filtration, the ultrafiltration membrane unit 12 can be detached for cleaning and then reused, thereby prolonging the service life of the ultrafiltration water purifier as a 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 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 invention. 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

The utility model provides an kinds of filter element subassemblies, its characterized in that includes filter flask, milipore filter unit, second grade milipore filter unit and carbon-point, the cavity that the filter flask formed is split into th cavity and second cavity, milipore filter unit detachably installs in the th cavity, be used for to the entering water in the th 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 of claim 1, wherein a partition is disposed in the filter bottle, the partition divides a cavity formed by the filter bottle into the th cavity and the second cavity, the 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 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 the end of the inner shell close to the partition and the partition, and a sealed state is formed between the end of the inner shell far away from the partition and the carbon rod.
3. The filter element assembly of claim 2, wherein the outer casing is provided with a secondary water through hole, the end of the outer casing is abutted with the partition plate, and the other end of the outer casing is abutted with the end face of the filter bottle through ribs.
4. The filter element assembly according to claim 2, wherein both ends of the carbon rod are respectively provided with an th end cap and a second end cap, the th end cap is arranged at the end of the carbon rod close to the partition plate, the second end cap is arranged at the end of the carbon rod far away from the partition plate, the second end cap is provided with a water inlet through hole, the 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.
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 of claim 1, wherein a partition is disposed in the filter flask, the partition divides a cavity formed by the filter flask into the th cavity and the second cavity, the ultrafiltration membrane unit comprises an ultrafiltration membrane and an ultrafiltration membrane housing, the ultrafiltration membrane is mounted in the ultrafiltration membrane housing, two ends of the ultrafiltration membrane housing are respectively supported and pressed between the partition and the filter flask, a side wall of the ultrafiltration membrane housing and the filter flask are arranged at intervals to form a th water inlet gap communicated with the water inlet of the th cavity, a water through hole communicated with the th water inlet gap is disposed on the side wall of the ultrafiltration membrane housing, and a water outlet of the ultrafiltration membrane housing is communicated with the water outlet of the th cavity.
7. The filter element assembly according to claim 6, wherein the water inlet of the th cavity and the water outlet of the th cavity are both arranged on the filter bottle, the part of the ultrafiltration membrane shell pressed against the partition plate is a bottom wall, and an auxiliary water through hole is arranged at the corner where the bottom wall and the side wall of the ultrafiltration membrane shell 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 of claims 1 to 8, wherein the filter flask comprises a th housing and a second housing, the part for forming the th cavity is a th housing, the part for forming the second cavity is a second housing, and the th housing is detachably connected with the second housing.
10. The filter cartridge assembly of , wherein the filter flask comprises a flask in which the secondary ultrafiltration unit and the ultrafiltration membrane unit are mounted in sequence, and a bottle cap on the side of the ultrafiltration membrane unit remote from the secondary ultrafiltration unit, the bottle cap being removably mounted on the flask.
An ultrafiltration water purifier of claim 11, , comprising the filter element assembly of any of claims 1 to 10 and .