Ultrafiltration water purifier

Abstract

The invention discloses an ultrafiltration water purifier, comprising: a cylindrical top cover; a cylindrical base, the top of which is detachably connected to the bottom of the cylindrical top cover through a first rotating clamp, a water inlet pipe and a water outlet pipe are arranged at the bottom of the cylindrical base, a water inlet channel and a water outlet channel are arranged inside the cylindrical base, one end of the water inlet channel is connected to the water inlet pipe, and one end of the water outlet channel is connected to the water outlet pipe; a cylindrical filter element, comprising: a cylindrical filter element housing, which is placed between the cylindrical base and the cylindrical top cover, the bottom of the cylindrical filter element housing is detachably connected to the top of the cylindrical base through a second rotating clamp; a cylindrical composite filter element assembly, which is placed in the cylindrical filter element housing, the interlayer space between the cylindrical composite filter element assembly and the cylindrical filter element housing forms a water inlet cavity, the water inlet cavity is connected to the other end of the water inlet channel, the internal space of the cylindrical composite filter element assembly forms a water outlet cavity, and the bottom of the water outlet cavity is connected to the other end of the water outlet channel. The water purifier has the advantages of simple filter element disassembly and assembly, convenient replacement, and good purification effect.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification devices, and more particularly to an ultrafiltration water purifier. Background Art

[0002] Ultrafiltration water purification technology has become a mainstream water purification technology in the industrial and household water purification industries. Its main purpose is to ensure the stability and safety of terminal water quality.

[0003] At present, the water purifiers on the market are equipped with multiple independent filter elements of different materials, generally 5-level, 6-level, 7-level, 8-level, and 9-level multi-stage filter elements. The filter elements are consumable parts and need to be replaced regularly. The more filter elements there are, the higher the cost of replacing the filter elements. In addition, as consumables, regular replacement requires manual removal and replacement of new filter elements. Traditional water purifier filter elements are connected with 2-point quick connectors. The water purifier needs to be disassembled and each filter element needs to be removed one by one with a screwdriver. However, it is generally difficult for users to handle them themselves or the machine may be damaged by improper installation, which may also cause water leakage hazards. The installer needs to provide maintenance fees, which makes some users feel troublesome. At the same time, the traditional ultrafiltration water purifier, the more stages there are, the greater the risk of water leakage, and the more places there are for dirt and grime to hide, which will increase the secondary pollution generated by the water purifier itself, that is, the number of bacterial species will increase.

[0004] Therefore, how to provide an ultrafiltration water purifier with a filter element that is easy to disassemble and replace, and has a small number of bacterial species is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] In view of this, the present invention provides an ultrafiltration water purifier with a filter element that is easy to disassemble and assemble, convenient to replace, and with a small number of bacterial species.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An ultrafiltration water purifier, comprising:

[0008] Cylindrical top cover;

[0009] A cylindrical base, wherein the top of the cylindrical base is detachably connected to the bottom of the cylindrical top cover via a first rotating clamp, a water inlet pipe and a water outlet pipe are arranged at the bottom of the cylindrical base, a water inlet channel and a water outlet channel are arranged inside the cylindrical base, one end of the water inlet channel is connected to the water inlet pipe, and one end of the water outlet channel is connected to the water outlet pipe;

[0010] A cylindrical filter element, comprising:

[0011] A cylindrical filter element housing, wherein the cylindrical filter element housing is disposed between the cylindrical base and the cylindrical top cover, and the bottom of the cylindrical filter element housing is detachably connected to the top of the cylindrical base via a second rotating clamping member;

[0012] A cylindrical composite filter element assembly, wherein the cylindrical composite filter element assembly is placed in the cylindrical filter element housing, and the interlayer space between the cylindrical composite filter element assembly and the cylindrical filter element housing forms a water inlet chamber, the water inlet chamber is connected to the other end of the water inlet channel, and the internal space of the cylindrical composite filter element assembly forms a water outlet chamber, and the bottom end of the water outlet chamber is connected to the other end of the water outlet channel.

[0013] It can be known from the above technical scheme that compared with the prior art, the present invention discloses an ultrafiltration water purifier, wherein the cylindrical top cover and the cylindrical base are detachably connected by a first rotating clamp, and the cylindrical filter element housing and the cylindrical base are detachably connected by a second rotating clamp. When replacing the cylindrical filter element, it is only necessary to remove the cylindrical top cover first, and then remove the cylindrical filter element, and replace it with a new cylindrical filter element. Therefore, the water purifier has the advantages of simple disassembly and assembly of the filter element and convenient replacement, and the user can replace the filter element by himself without the need for professional staff, which can reduce the maintenance cost of the water purifier.

[0014] Furthermore, a plurality of first clamping blocks are evenly distributed along the circumference of the inner wall of the bottom end of the cylindrical top cover, and the cylindrical base includes:

[0015] A support cylinder seat, wherein the water inlet channel and the water outlet channel are arranged inside the support cylinder seat, and the top of the support cylinder seat is detachably connected to the bottom of the cylindrical filter element housing through the second rotating clamping piece;

[0016] An inner cylinder, wherein the bottom end of the inner cylinder is fixedly connected to the support cylinder seat, the top end of the inner cylinder is evenly provided with a plurality of first clamping rotation grooves along its circumference, and the first clamping block is rotatably clamped and fixed with the first clamping rotation groove to constitute the first rotating clamping member;

[0017] The outer cylinder is sleeved outside the inner cylinder, the top end of the inner cylinder is fixedly connected to the top end of the outer cylinder, and the bottom end of the outer cylinder is fixedly connected to the support cylinder seat.

[0018] The beneficial effect of adopting the above technical solution is that the cylindrical top cover can be fixed to the inner cylinder body by rotating and clamping the first clamping block and the first clamping rotation groove, which is simple to operate and does not require professional personnel to operate.

[0019] Furthermore, one end of the first snap-in rotary groove is open and is the first open end, and the other end is closed and is the first closed end, and the first snap-in block is screwed into the first closed end from the first open end, wherein a snap-in notch is provided on the first snap-in block, and a snap-in protrusion is provided on the inner groove wall of the first snap-in rotary groove, and when the first snap-in block and the first snap-in rotary groove are rotated and snap-engaged and fixed, the snap-in protrusion is snap-engaged and fixed with the snap-in notch.

[0020] The beneficial effect of adopting the above technical solution is that when installing the cylindrical top cover, it is only necessary to screw the first clamping block from the first open end to the first closed end to fix the cylindrical top cover to the inner cylinder; when removing the cylindrical top cover, it is only necessary to screw the first clamping block from the first closed end to the first open end to remove the cylindrical top cover from the inner cylinder, and the installation structure is simple and easy to operate; in addition, the clamping protrusion and the clamping notch are clamped and fixed, which can prevent the first clamping block from retreating and ensure the firmness of the connection between the two, and when the clamping protrusion and the clamping notch are clamped and fixed, a "click" sound will be emitted, prompting the user that the cylindrical top cover and the inner cylinder have been clamped and fixed.

[0021] Furthermore, a plurality of second clamping blocks are evenly distributed along the circumference of the inner edge of the top end of the support cylinder seat, and a plurality of second clamping grooves are evenly distributed along the circumference of the bottom outer periphery of the cylindrical filter element housing, and the second clamping blocks are rotationally clamped and fixed with the second clamping grooves to constitute the second rotating clamping member.

[0022] The beneficial effect of adopting the above technical solution is that the cylindrical filter element can be fixed to the supporting cylinder seat by rotating and clamping the second clamping block and the second clamping rotation groove, which is simple to operate and does not require professional personnel to operate.

[0023] Furthermore, one end of the second snap-in rotation groove is open and is the second open end, and the other end is closed and is the second closed end, and the second snap-in block is screwed into the second closed end from the second open end, wherein the bottom end surface of the second snap-in block has a first snap-in bevel, and the top end surface of the second snap-in rotation groove has a second snap-in bevel that is adapted to the shape of the first snap-in bevel and is in snap-in contact with it.

[0024] The beneficial effect of adopting the above technical solution is that when installing the cylindrical filter element, the cylindrical filter element and the supporting cylinder seat can be fixed by only screwing the second clamping block from the second open end to the second closed end; when removing the cylindrical filter element, the cylindrical filter element can be removed from the supporting cylinder seat by only screwing the second clamping block from the second closed end to the second open end, and the installation structure is simple and easy to operate; in addition, the first clamping bevel and the second clamping bevel are clamped and fixed, which can prevent the second clamping block from retreating and ensure the firmness of the connection between the two, and when the first clamping bevel and the second clamping bevel are clamped and fixed, a "click" sound of being locked in place will be emitted, prompting the user that the cylindrical filter element and the supporting cylinder seat have been clamped and fixed.

[0025] Furthermore, a plurality of screw connection columns are evenly distributed on the outer circumference of the support cylinder seat, a plurality of first connection protrusions are evenly distributed on the outer circumference of the bottom end of the inner cylinder, and a first screw is passed through the first connection protrusion and is screwed and fixed to the screw connection column.

[0026] Furthermore, a plurality of threaded holes are evenly distributed circumferentially on the top end of the inner cylinder, a plurality of second connecting protrusions are evenly distributed circumferentially on the top end of the outer cylinder, and a second screw is passed through the second connecting protrusion and is screwed and fixed to the threaded hole.

[0027] Furthermore, a connecting hole connected to the water inlet chamber is formed at the bottom end of the cylindrical filter element housing, the bottom end of the cylindrical filter element housing is plugged into the first plug-in cylinder inside the supporting cylinder seat, the interior of the first plug-in cylinder is connected to the connecting hole and the other end of the water inlet channel, the bottom end of the cylindrical composite filter element assembly is plugged into the second plug-in cylinder inside the supporting cylinder seat, the interior of the second plug-in cylinder is connected to the water outlet chamber and the other end of the water outlet channel.

[0028] The beneficial effect of adopting the above technical solution is that the water to be filtered enters the first plug-in cylinder from the water inlet pipe through the water inlet channel, then enters the water inlet chamber through the connecting hole, enters the water outlet chamber after being filtered by the cylindrical composite filter element assembly, and then the filtered water flows out through the second plug-in cylinder, the water outlet channel, and the water outlet pipe.

[0029] Furthermore, the cylindrical composite filter element assembly comprises:

[0030] An ultrafiltration membrane supporting cylinder, the ultrafiltration membrane supporting cylinder is placed inside the cylindrical filter element housing, the bottom end of the ultrafiltration membrane supporting cylinder passes through the bottom end of the cylindrical filter element housing and is plugged into the second plug-in cylinder inside the supporting cylinder seat, an ultrafiltration membrane filter element is arranged inside the ultrafiltration membrane supporting cylinder, and a lower end cover is arranged at the top of the ultrafiltration membrane supporting cylinder;

[0031] An activated carbon filter cartridge body, wherein the bottom end of the activated carbon filter cartridge body is placed in a first annular limiting groove on the top end surface of the lower end cover, and the top end of the activated carbon filter cartridge body is placed in a second annular limiting groove on the bottom end surface of the upper end cover;

[0032] The PP cotton filter cartridge body is sleeved inside the activated carbon filter cartridge body, and the two are coaxially arranged, and the bottom end and the top end of the PP cotton filter cartridge body are respectively placed in the first annular limiting groove and the second annular limiting groove.

[0033] The beneficial effect of the above technical solution is that the water in the water inlet cavity is first filtered once through the PP cotton filter cartridge, and then filtered for the second time through the activated carbon filter cartridge, and then flows into the water outlet cavity downward, and is filtered again through the ultrafiltration membrane filter cartridge to obtain purified water with better water quality, and then the purified water flows out through the second plug-in cartridge, the water outlet channel, and the water outlet pipe. The filter cartridge uses a single composite filter cartridge, that is, PP cotton, activated carbon, and ultrafiltration membrane are combined in a filter cartridge, so that all the filter cartridges are replaced uniformly when they are replaced, and the new filter cartridge will not be affected by the excessive bacteria in other unreplaced filter cartridges, and the filter cartridge has fewer stages, which can effectively reduce the number of bacterial species and reduce the problem of secondary pollution caused by the water purifier itself; at the same time, the last stage of the composite filter cartridge is an ultrafiltration membrane filter cartridge, and the characteristic of the ultrafiltration membrane is to remove Escherichia coli and the number of bacterial species, and the material of the ultrafiltration membrane itself has the function of inhibiting bacterial growth, so the water purified by the water purifier is safer and healthier.

[0034] Furthermore, a plurality of rubber support suction cups are evenly distributed on the bottom end of the support cylinder seat.

[0035] The beneficial effect of adopting the above technical solution is to improve the stability of the water purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0037] Figure 1 The accompanying drawing is a schematic cross-sectional structure diagram of an ultrafiltration water purifier provided by the present invention.

[0038] Figure 2 The attached picture is Figure 1 Schematic diagram of the assembly structure.

[0039] Figure 3 The attached picture is Figure 1 Schematic diagram of the decomposition structure.

[0040] Figure 4 The accompanying drawing is a schematic structural diagram of the first clamping block.

[0041] Figure 5 The accompanying drawing is a schematic structural diagram of the first clamping rotation groove.

[0042] Figure 6 The accompanying drawing is a schematic diagram of the exploded structure of the cylindrical base.

[0043] Figure 7The accompanying drawing is a schematic structural diagram of the inner cylinder and the outer cylinder.

[0044] Figure 8 The attached figure is a schematic diagram of the structure of the cylindrical filter element and the supporting cylinder seat.

[0045] Fig. 9 The accompanying drawing is a schematic structural diagram of the support cylinder seat.

[0046] Fig.10 The accompanying drawing is a schematic structural diagram of the second snap-fitting rotation groove. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 10 The embodiment of the present invention discloses an ultrafiltration water purifier, comprising:

[0049] Cylindrical top cover 1;

[0050] The cylindrical base 2 has a top end and a bottom end of the cylindrical top cover 1 that are detachably connected via a first rotating clamp 3. A water inlet pipe 4 and a water outlet pipe 5 are provided at the bottom of the cylindrical base 2. A water inlet channel 201 and a water outlet channel 202 are provided inside the cylindrical base 2. One end of the water inlet channel 201 is connected to the water inlet pipe 4, and one end of the water outlet channel 202 is connected to the water outlet pipe 5.

[0051] The cylindrical filter element 6 comprises:

[0052] A cylindrical filter housing 61, the cylindrical filter housing 61 is placed between the cylindrical base 2 and the cylindrical top cover 1, and the bottom of the cylindrical filter housing 61 is detachably connected to the top of the cylindrical base 2 via a second rotating clamp 7;

[0053] The cylindrical composite filter element assembly 62 is placed in the cylindrical filter element housing 61, and the interlayer space between the cylindrical composite filter element assembly 62 and the cylindrical filter element housing 61 forms a water inlet chamber 601, the water inlet chamber 601 is connected to the other end of the water inlet channel 201, and the internal space of the cylindrical composite filter element assembly 62 forms a water outlet chamber 602, and the bottom end of the water outlet chamber 602 is connected to the other end of the water outlet channel 202.

[0054] A plurality of first clamping blocks 31 are evenly distributed along the circumference of the inner wall of the bottom end of the cylindrical top cover 1, and the cylindrical base 2 includes:

[0055] A support cartridge seat 21, wherein a water inlet channel 201 and a water outlet channel 202 are arranged inside the support cartridge seat 21, and the top end of the support cartridge seat 21 is detachably connected to the bottom end of the cylindrical filter element housing 61 via a second rotating clamping member 7;

[0056] The inner cylinder 22, the bottom end of the inner cylinder 22 is fixedly connected to the support cylinder seat 21, the top end of the inner cylinder 22 is evenly provided with a plurality of first clamping rotation grooves 32 along its circumference, the first clamping block 31 is rotatably clamped and fixed with the first clamping rotation groove 32, and is used to form a first rotating clamping member 3;

[0057] The outer cylinder 23 is sleeved on the outside of the inner cylinder 22 , the top of the inner cylinder 22 is fixedly connected to the top of the outer cylinder 23 , and the bottom of the outer cylinder 23 is fixedly connected to the support cylinder seat 21 .

[0058] One end of the first snap-in rotary groove 32 is open and is the first open end 321, and the other end is closed and is the first closed end 322. The first snap-in block 31 is screwed into the first closed end 322 from the first open end 321, wherein the first snap-in block 31 is provided with a snap-in notch 311, and the inner groove wall of the first snap-in rotary groove 32 is provided with a snap-in protrusion 323. When the first snap-in block 31 and the first snap-in rotary groove 32 are rotated and snap-fitted, the snap-in protrusion 323 is snap-fitted and fixed with the snap-in notch 311.

[0059] A plurality of second clamping blocks 71 are evenly distributed along the circumference of the inner edge of the top end of the support cylinder seat 21, and a plurality of second clamping grooves 72 are evenly distributed along the circumference of the bottom outer periphery of the cylindrical filter element housing 61. The second clamping blocks 71 are rotatably clamped and fixed with the second clamping grooves 72 to form a second rotating clamping member 7.

[0060] One end of the second snap-in rotary groove 72 is open and is a second open end 721, and the other end is closed and is a second closed end 722. The second snap-in block 71 is screwed from the second open end 721 to the second closed end 722, wherein the second snap-in block 71 has a first snap-in bevel 711 on the bottom end face, and the second snap-in rotary groove 72 has a second snap-in bevel 723 that is adapted in shape to and in snap-in contact with the first snap-in bevel 711 on the top end face.

[0061] A plurality of screw connection columns 211 are evenly distributed on the outer circumference of the support cylinder seat 21 , a plurality of first connection protrusions 221 are evenly distributed on the outer circumference of the bottom end of the inner cylinder body 22 , and the first screws are passed through the first connection protrusions 221 and are screwed and fixed to the screw connection columns 211 .

[0062] A plurality of threaded holes 222 are evenly distributed circumferentially at the top end of the inner cylinder 22 , a plurality of second connection protrusions 231 are evenly distributed circumferentially at the top end of the outer cylinder 23 , and the second screws are passed through the second connection protrusions 231 and are screwed and fixed to the threaded holes 222 .

[0063] A connecting hole 611 connected to the water inlet chamber 601 is formed at the bottom end of the cylindrical filter element housing 61. The bottom end of the cylindrical filter element housing 61 is plugged into the first plug-in cylinder 212 inside the support cylinder seat 21. The interior of the first plug-in cylinder 212 is connected to the connecting hole 611 and the other end of the water inlet channel 201. The bottom end of the cylindrical composite filter element assembly 62 is plugged into the second plug-in cylinder 213 inside the support cylinder seat 21. The interior of the second plug-in cylinder 213 is connected to the water outlet chamber 602 and the other end of the water outlet channel 202.

[0064] The cylindrical composite filter element assembly 62 includes:

[0065] The ultrafiltration membrane support cylinder 621 is placed inside the cylindrical filter element housing 61, the bottom end of the ultrafiltration membrane support cylinder 621 penetrates the bottom end of the cylindrical filter element housing 61 and is plugged into the second plug-in cylinder 213 inside the support cylinder seat 21, an ultrafiltration membrane filter element 622 is arranged in the ultrafiltration membrane support cylinder 621, and a lower end cover 623 is arranged at the top of the ultrafiltration membrane support cylinder 621;

[0066] The activated carbon filter cartridge body 624, the bottom end of the activated carbon filter cartridge body 624 is placed in the first annular limiting groove 6231 on the top end surface of the lower end cover 623, and the top end of the activated carbon filter cartridge body 624 is placed in the second annular limiting groove 6251 on the bottom end surface of the upper end cover 625;

[0067] The PP cotton filter cartridge body 626 is sleeved inside the activated carbon filter cartridge body 624, and the two are coaxially arranged, and the bottom and top ends of the PP cotton filter cartridge body 626 are respectively placed in the first annular limiting groove 6231 and the second annular limiting groove 6251.

[0068] A plurality of rubber support suction cups 8 are evenly distributed on the bottom end of the support cylinder seat 21 .

[0069] Among them, the filter cartridge of the ultrafiltration water purifier adopts a single composite filter element, that is, PP cotton, activated carbon, and ultrafiltration membrane are compounded in one filter element. This can ensure that all the filter elements are replaced at the same time, and ensure that the new filter element will not be affected by the excessive bacteria in other unreplaced filter elements. At the same time, the last stage of the composite filter element is an ultrafiltration membrane filter element. The characteristic of the ultrafiltration membrane is to remove E. coli and the number of colony species, and the material of the ultrafiltration membrane itself has the function of inhibiting bacterial growth, so the water purified by the water purifier is safer and healthier.

[0070] In order to facilitate users to install the water purifier themselves, the water purifier can be equipped with a three-way ball valve directly installed on the faucet, that is, one end of the three-way ball valve is installed on the faucet, and the other two ends are respectively connected to the water inlet pipe and the water outlet pipe.

[0071] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultrafiltration water purifier, characterized in that: include: A cylindrical top cover (1); A cylindrical base (2), wherein the top end of the cylindrical base (2) is detachably connected to the bottom end of the cylindrical top cover (1) via a first rotating clamp (3), a water inlet pipe (4) and a water outlet pipe (5) are provided at the bottom of the cylindrical base (2), and a water inlet channel (201) and a water outlet channel (202) are provided inside the cylindrical base (2), one end of the water inlet channel (201) is connected to the water inlet pipe (4), and one end of the water outlet channel (202) is connected to the water outlet pipe (5); A cylindrical filter element (6), wherein the cylindrical filter element (6) comprises: A cylindrical filter element housing (61), the cylindrical filter element housing (61) being disposed between the cylindrical base (2) and the cylindrical top cover (1), and the bottom of the cylindrical filter element housing (61) and the top of the cylindrical base (2) being detachably connected via a second rotating clamping member (7); A cylindrical composite filter element assembly (62), wherein the cylindrical composite filter element assembly (62) is placed in the cylindrical filter element housing (61), and the interlayer space between the cylindrical composite filter element assembly (62) and the cylindrical filter element housing (61) forms a water inlet chamber (601), the water inlet chamber (601) is connected to the other end of the water inlet channel (201), and the internal space of the cylindrical composite filter element assembly (62) forms a water outlet chamber (602), and the bottom end of the water outlet chamber (602) is connected to the other end of the water outlet channel (202); A plurality of first clamping blocks (31) are evenly distributed along the circumference of the inner wall of the bottom end of the cylindrical top cover (1), and the cylindrical base (2) comprises: A support cartridge seat (21), wherein the water inlet channel (201) and the water outlet channel (202) are arranged inside the support cartridge seat (21), and the top end of the support cartridge seat (21) is detachably connected to the bottom end of the cylindrical filter element housing (61) via the second rotating clamping member (7); An inner cylinder (22), the bottom end of the inner cylinder (22) being fixedly connected to the support cylinder seat (21), the top end of the inner cylinder (22) being evenly provided with a plurality of first clamping rotation grooves (32) along its circumference, the first clamping block (31) being rotatably clamped and fixed to the first clamping rotation grooves (32), so as to constitute the first rotating clamping member (3); an outer cylinder (23), the outer cylinder (23) being sleeved outside the inner cylinder (22), the top end of the inner cylinder (22) being fixedly connected to the top end of the outer cylinder (23), and the bottom end of the outer cylinder (23) being fixedly connected to the support cylinder seat (21); The bottom end of the cylindrical filter element housing (61) is plugged into a first plug-in cylindrical body (212) inside the support cylindrical seat (21); the bottom end of the cylindrical composite filter element assembly (62) is plugged into a second plug-in cylindrical body (213) inside the support cylindrical seat (21); The cylindrical composite filter element assembly (62) comprises: An ultrafiltration membrane support cylinder (621), the ultrafiltration membrane support cylinder (621) being placed inside the cylindrical filter element housing (61), the bottom end of the ultrafiltration membrane support cylinder (621) penetrating the bottom end of the cylindrical filter element housing (61) and plugging into a second plug-in cylinder (213) inside the support cylinder seat (21), an ultrafiltration membrane filter element (622) being arranged inside the ultrafiltration membrane support cylinder (621), and a lower end cover (623) being arranged at the top end of the ultrafiltration membrane support cylinder (621); A plurality of rubber support suction cups (8) are evenly distributed on the bottom end of the support cylinder seat (21).

2. The ultrafiltration water purifier according to claim 1, characterized in that: One end of the first engaging rotary groove (32) is open and is a first open end (321), and the other end is closed and is a first closed end (322); the first engaging block (31) is screwed from the first open end (321) to the first closed end (322); a engaging notch (311) is provided on the first engaging block (31); an inner groove wall of the first engaging rotary groove (32) is provided with a engaging protrusion (323); when the first engaging block (31) and the first engaging rotary groove (32) are rotated and engaged, the engaging protrusion (323) is engaged and engaged with the engaging notch (311).

3. The ultrafiltration water purifier according to claim 1, characterized in that: A plurality of second clamping blocks (71) are evenly distributed along the circumference of the inner edge of the top end of the support cylinder seat (21); a plurality of second clamping rotation grooves (72) are evenly distributed along the circumference of the bottom outer periphery of the cylindrical filter element housing (61); the second clamping blocks (71) are rotatably clamped and fixed to the second clamping rotation grooves (72) to form the second rotatable clamping member (7).

4. The ultrafiltration water purifier according to claim 3, characterized in that: One end of the second snap-in rotary groove (72) is open and is the second open end (721), and the other end is closed and is the second closed end (722); the second snap-in block (71) is screwed from the second open end (721) to the second closed end (722); the bottom end surface of the second snap-in block (71) has a first snap-in inclined surface (711), and the top end surface of the second snap-in rotary groove (72) has a second snap-in inclined surface (723) that is adapted in shape to and in snap-in contact with the first snap-in inclined surface (711).

5. The ultrafiltration water purifier according to claim 1, characterized in that: A plurality of screw connection columns (211) are evenly distributed on the outer circumference of the support cylinder seat (21), a plurality of first connection protrusions (221) are evenly distributed on the outer circumference of the bottom end of the inner cylinder (22), and a first screw is passed through the first connection protrusion (221) and is screwed and fixed to the screw connection column (211).

6. The ultrafiltration water purifier according to claim 1, characterized in that: The top end of the inner cylinder (22) is evenly provided with a plurality of threaded holes (222) in a circumferentially distributed manner, the top end of the outer cylinder (23) is evenly provided with a plurality of second connection protrusions (231) in a circumferentially distributed manner, and the second screws are passed through the second connection protrusions (231) and are screwed and fixed to the threaded holes (222).

7. An ultrafiltration water purifier according to any one of claims 1 to 6, characterized in that: A communicating hole (611) communicating with the water inlet chamber (601) is formed at the bottom end of the cylindrical filter element housing (61); the interior of the first plug-in cylindrical body (212) is communicated with the communicating hole (611) and the other end of the water inlet channel (201); and the interior of the second plug-in cylindrical body (213) is communicated with the water outlet chamber (602) and the other end of the water outlet channel (202).

8. The ultrafiltration water purifier according to claim 7, characterized in that: The cylindrical composite filter element assembly (62) further comprises: An activated carbon filter cartridge body (624), wherein the bottom end of the activated carbon filter cartridge body (624) is placed in a first annular limiting groove (6231) on the top end surface of the lower end cover (623), and the top end of the activated carbon filter cartridge body (624) is placed in a second annular limiting groove (6251) on the bottom end surface of the upper end cover (625); A PP cotton filter cartridge body (626), wherein the PP cotton filter cartridge body (626) is sleeved inside the activated carbon filter cartridge body (624), and the two are coaxially arranged, and the bottom end and the top end of the PP cotton filter cartridge body (626) are respectively placed in the first annular limiting groove (6231) and the second annular limiting groove (6251).

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