CN215924577U - Water purifying device using ultrafiltration membrane filter element - Google Patents

Abstract

The utility model discloses a water purifying device using an ultrafiltration membrane filter element, which comprises an outer shell, an inner shell, a preposed activated carbon filter element, an ultrafiltration membrane filter element and a postpositive activated carbon filter element; the inner shell is arranged in the outer shell, and the preposed activated carbon filter element and the ultrafiltration membrane filter element are both arranged between the inner side surface of the outer shell and the outer side surface of the inner shell; the front active carbon filter element is sleeved on the outer sides of the ultrafiltration membrane filter element and the inner shell; the rear active carbon filter element is arranged in the inner shell; the rear active carbon filter element is positioned below the ultrafiltration membrane filter element, the upper end of the inner shell is provided with a purified water inlet, and the lower end of the inner shell is provided with a purified water outlet; the purified water delivery outlet is communicated with the outside downwards, an ultrafiltration membrane is arranged in the water purifying device using the ultrafiltration membrane filter element, impurities in the water to be purified can be removed, trace elements and mineral substances which are beneficial to a human body and in the water to be purified are reserved, the water purifying device is suitable for further filtering and purifying mineral water or drinking water, and the water purifying device has the advantages of compact structure, large circulation and high purification efficiency.

Description

Water purifying device using ultrafiltration membrane filter element

Technical Field

The utility model relates to the technical field of water purification equipment, in particular to a water purification device using an ultrafiltration membrane filter element.

Background

The multi-stage filtration water purifier containing the RO membrane in the prior art has a complex structure and low overall purification efficiency, and the RO membrane can filter trace elements and minerals in water which are beneficial to a human body, so that the multi-stage filtration water purifier is not suitable for further filtration and purification of mineral water or drinking water.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks, an object of the present invention is to provide a water purifier having high purification efficiency and suitable for mineral water or drinking water.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a water purifying device using an ultrafiltration membrane filter element comprises an outer shell, an inner shell, a preposed activated carbon filter element, an ultrafiltration membrane filter element and a postpositional activated carbon filter element;

the inner shell is arranged in the outer shell, and the preposed activated carbon filter element and the ultrafiltration membrane filter element are both arranged between the inner side surface of the outer shell and the outer side surface of the inner shell; the front activated carbon filter element is sleeved on the outer sides of the ultrafiltration membrane filter element and the inner shell; the rear active carbon filter element is arranged in the inner shell; the rear active carbon filter element is positioned below the ultrafiltration membrane filter element;

the initial filtering end of the front activated carbon filter element is communicated with the filtering end of the initial filtering water, the filtering end of the front activated carbon filter element is communicated with the initial filtering end of the ultrafiltration membrane filter element, the lower end of the ultrafiltration membrane filter element is a purified water output end, and the gap between the outer side surface of the rear activated carbon filter element and the inner side surface of the inner shell is a purified water initial filtering end;

the upper end of the inner shell is provided with a purified water inlet, and the lower end of the inner shell is provided with a purified water outlet;

the upper end of purification water input port with the purification water output of milipore filter core is linked together, the lower extreme of purification water input port with the pure water is first strained and is held the intercommunication mutually, the medial surface of rearmounted active carbon filter core is the pure water and strains the end, the upper end of pure water delivery outlet with the pure water of rearmounted active carbon filter core filters out the end and communicates mutually, the lower extreme and the external world of pure water delivery outlet are linked together.

Further, the filter also comprises a primary filter element;

the primary filter element is a PP cotton filter element, a microporous ceramic sintered filter element, a microporous diatomite sintered filter element or a microporous molecular sieve sintered filter element;

the outer side surface of the primary filter element is a filter starting end, and the inner side surface of the primary filter element is a filter end;

the primary filter element is sleeved on the outer side of the front active carbon filter element.

Preferably, the hollow fiber tube is filled in the ultrafiltration membrane filter element, and the aperture of the ultrafiltration micropore contained in the hollow fiber tube is less than 0.01 micron.

Further, the inner shell comprises an inner lower shell, an inner upper shell and an inner cylinder body;

the upper end of the inner cylinder body is in threaded connection with the edge of the inner upper shell, which extends downwards, and the lower end of the inner cylinder body is connected with the middle part of the inner lower shell;

the medial surface of interior barrel surrounds the lateral surface of rearmounted active carbon filter core, the medial surface of interior barrel with be equipped with the clearance between the lateral surface of rearmounted active carbon filter core.

Specifically, the middle part of the inner upper shell is provided with a purified water input pipe extending upwards;

the purified water input port is arranged at the upper end part of the purified water input pipe;

the bottom of the ultrafiltration membrane filter element is provided with a purified water output pipe extending downwards, and the purified water output pipe is positioned at the purified water output end of the ultrafiltration membrane filter element; the upper end of the purified water output pipe is communicated with the filtering end of the ultrafiltration membrane filter element; the lower end of the purified water output pipe is downwards inserted into the purified water input port, and the lower end of the purified water output pipe is communicated with a gap between the inner side surface of the inner cylinder and the outer side surface of the rear activated carbon filter element;

the inner side surface of the purified water input pipe surrounds the outer side surface of the purified water output pipe, and the top surface of the upper end part of the purified water input pipe is abutted against the lower bottom surface of the ultrafiltration membrane filter element.

Further, the inner lower shell is provided with a purified water output pipe, and the middle part of the inner lower shell extends downwards to form the purified water output pipe;

the upper end of the purified water output pipe extends upwards and protrudes outwards from the top surface of the inner lower shell, the lower end of the rear activated carbon filter element is abutted against the top surface of the inner lower shell, and the inner side surface of the rear activated carbon filter element is abutted against the outer side surface of the upper end part of the purified water output pipe;

the purified water output port is positioned at the lower end part of the purified water output pipe, and the filtering end of the rear activated carbon filter element is communicated with the outside through the purified water output pipe.

Further, the filter also comprises a middle cover, wherein the middle cover is arranged at the top of the rear active carbon filter element;

the bottom surface of the middle cover covers and abuts against the top surface of the rear activated carbon filter element, the edge of the middle cover extends downwards and surrounds the upper end of the rear activated carbon filter element, and the inner side surface of the edge of the middle cover abuts against the outer side surface of the upper end part of the rear activated carbon filter element;

the middle cover is positioned below the purified water input pipe, a gap is arranged between the middle cover and the lower end of the purified water input pipe, and the gap between the middle cover and the lower end part of the purified water input pipe is communicated with the gap between the inner side surface of the inner cylinder and the outer side surface of the rear activated carbon filter element.

Further, the device also comprises an upper cover;

the upper cover is detachably sleeved on the tops of the primary filter element, the preposed activated carbon filter element and the ultrafiltration membrane filter element;

the bottom surface of the upper cover covers and abuts against the top surfaces of the primary filter element and the preposed activated carbon filter element, the middle part of the upper cover is downwards sunken and abuts against the top surface of the ultrafiltration membrane filter element, the edge of the upper cover downwards extends and surrounds the upper end part of the primary filter element, and the inner side surface of the edge of the upper cover abuts against the outer side surface of the upper end part of the primary filter element;

the top surface of the upper cover is abutted against the inner top surface of the shell.

Further, the shell is provided with a water inlet pipe and a water outlet pipe;

the water inlet and outlet pipe is positioned at the lower end of the shell, and the inner side surface of the water inlet and outlet pipe surrounds the outer side surface of the purified water output pipe;

a gap is arranged between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe, and the gap between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe is communicated with the filtration starting end of the primary filter element;

the device also comprises an output check valve and an input check valve;

the output check valve is arranged at the purified water output port and is a check valve which is internally communicated in a one-way manner; the input check valve is installed between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe.

Specifically, the lower end surfaces of the primary filter element and the front activated carbon filter element are adjacently abutted against the top surface of the inner lower shell exposed out of the inner cylinder body;

the edge of the inner lower shell extends upwards to surround the lower end part of the primary filter element, and the inner side surface of the edge of the inner lower shell is abutted against the outer side surface of the lower end part of the primary filter element;

and a gap is arranged between the outer side surface of the edge of the inner lower shell and the inner side surface of the shell, and the filtration starting end of the primary filter element is communicated with the upper end of the input check valve through the gap between the outer side surface of the edge of the inner lower shell and the inner side surface of the shell.

The technical scheme of the utility model has the beneficial effects that: the water purifier using the ultrafiltration membrane filter element is internally provided with the ultrafiltration membrane, can remove impurities in water to be purified, retains trace elements and mineral substances which are beneficial to human bodies and are in the water to be purified, is suitable for further filtering and purifying mineral water or drinking water, and has the advantages of compact structure, large circulation and high purification efficiency.

Drawings

FIG. 1 is a schematic sectional view showing a water purification apparatus using an ultrafiltration membrane cartridge according to an embodiment of the present invention;

FIG. 2 is a schematic view of the water purification apparatus using the ultrafiltration membrane cartridge of FIG. 1 without a housing;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic diagram of the water purification apparatus using an ultrafiltration membrane cartridge of FIG. 2 without a primary cartridge and a pre-activated carbon cartridge;

fig. 5 is a partial enlarged view of a portion a of fig. 3;

wherein: a housing 1; an inner casing 2; a primary filter element 3; a front activated carbon filter element 4; an ultrafiltration membrane filter element 5; a post-positioned active carbon filter element 6; an output check valve 7; an upper cover 9 of the input check valve 8; a water inlet and outlet pipe 11; a middle cover 12; (ii) a An inner lower case 21; an inner upper shell 22; an inner cylinder 23; a purified water output pipe 51; a purified water input pipe 221; a purified water output pipe 211; a purified water output port 2111; a purified water input port 2211.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying fig. 1-5.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

A water purifying device using an ultrafiltration membrane filter element comprises an outer shell 1, an inner shell 2, a preposed activated carbon filter element 4, an ultrafiltration membrane filter element 5 and a postposition activated carbon filter element 6;

the inner shell 2 is arranged in the outer shell 1, and the preposed activated carbon filter element 4 and the ultrafiltration membrane filter element 5 are both arranged between the inner side surface of the outer shell 1 and the outer side surface of the inner shell 2; the front activated carbon filter element 4 is sleeved on the outer sides of the ultrafiltration membrane filter element 5 and the inner shell 2; the rear active carbon filter element 6 is arranged in the inner shell 2; the post-positioned active carbon filter element 6 is positioned below the ultrafiltration membrane filter element 5;

the initial filtering end of the front activated carbon filter element 4 is communicated with the filtering end of the initial filtered water, the filtering end of the front activated carbon filter element 4 is communicated with the initial filtering end of the ultrafiltration membrane filter element 5, the lower end of the ultrafiltration membrane filter element 5 is a purified water output end, and the gap between the outer side surface of the rear activated carbon filter element 6 and the inner side surface of the inner shell 2 is a purified water initial filtering end;

a purified water input port 2211 is formed in the upper end of the inner shell 2, and a purified water output port 2111 is formed in the lower end of the inner shell 2;

the upper end of purified water input port 2211 with the purified water output end of milipore filter 5 is linked together, the lower extreme of purified water input port 2211 with the pure water is started to strain the end and is linked together, the medial surface of rearmounted active carbon filter core 6 is the purified water and is strained the end, the upper end of pure water output port 2111 with the pure water of rearmounted active carbon filter core 6 filters out the end and is linked together, the lower extreme of pure water output port 2111 is linked together with the external world.

As shown in fig. 1 to 5, in the water purification apparatus using ultrafiltration membrane cartridges of the present invention, the purified water outlet 2111 is installed with a downward opening, the primarily filtered water is purified and filtered by the pre-activated carbon cartridge 4, the ultrafiltration membrane cartridge 5 and the post-activated carbon cartridge 6, and the purified water is discharged outward through the purified water outlet 2111, the ultrafiltration membrane in the ultrafiltration membrane cartridge 5 can remove impurities in the water to be purified, can thoroughly filter harmful substances such as bacteria, rust and colloid in the water to be purified, and retains trace elements and minerals in the water to be purified that are beneficial to the human body, and is suitable for further filtration and purification of mineral water or drinking water, and the ultrafiltration membrane cartridges 5 and the post-activated carbon cartridge 6 arranged up and down each have a relatively independent space with a larger volume capacity, so that the water purification apparatus using ultrafiltration membrane cartridges of the present invention includes a multi-stage purification function, has the advantages of compact structure, large circulation and high purification efficiency.

Further, the filter also comprises a primary filter element 3;

the primary filter element 3 is a PP cotton filter element, a microporous ceramic sintered filter element, a microporous diatomite sintered filter element or a microporous molecular sieve sintered filter element;

the outer side surface of the primary filter element 3 is a filter starting end, and the inner side surface of the primary filter element 3 is a filter end;

the primary filter element 3 is sleeved outside the front active carbon filter element 4.

As shown in fig. 1 to 3, the PP cotton filter element, the microporous ceramic sintered filter element, the microporous diatomite sintered filter element or the microporous molecular sieve sintered filter element can effectively filter sand, scale, impurities, etc. contained in mineral water or drinking water, and reduce the blockage and workload of other filter elements.

Preferably, the ultrafiltration membrane filter element 5 is filled with a hollow fiber tube, and the aperture of ultrafiltration micropores contained in the hollow fiber tube is less than 0.01 micron.

The ultrafiltration membrane filter element 5 containing the hollow fiber tube can separate solutes with the size of 0.01-0.1 mu m in water and retain trace elements and mineral substances in the water which are beneficial to human bodies.

Specifically, the inner shell 2 comprises an inner lower shell 21, an inner upper shell 22 and an inner cylinder 23;

the upper end of the inner cylinder 23 is screwed with the edge of the inner upper shell 22 extending downwards, and the lower end of the inner cylinder 23 is connected with the middle part of the inner lower shell 21;

the medial surface of interior barrel 23 surrounds the lateral surface of rearmounted active carbon filter 6, the medial surface of interior barrel 23 with be equipped with the clearance between the lateral surface of rearmounted active carbon filter 6.

As shown in fig. 3-5, the top surface of the inner lower casing 21, the bottom surface of the inner upper casing 22 and the inner side surface of the inner cylinder 23 enclose to form a closed filter chamber, so that the purified water purified by the post-positioned activated carbon filter element 6 can be prevented from being polluted, and the quality of the outputted purified water can be improved.

The upper end of the inner cylinder 23 is screwed with the downwardly extending edge of the inner upper shell 22, and the inner cylinder is detachable, so that the rear active carbon filter element 6 is convenient to repair and replace.

Specifically, the middle part of the inner upper shell 22 is provided with a purified water input pipe 221 extending upwards;

the purified water input port 2211 is provided at an upper end portion of the purified water input pipe 221;

a purified water output pipe 51 extending downwards is arranged at the bottom of the ultrafiltration membrane filter element 5, and the purified water output pipe 51 is positioned at the purified water output end of the ultrafiltration membrane filter element 5; the upper end of the purified water output pipe 51 is communicated with the filtering end of the ultrafiltration membrane filter element 5; the lower end of the purified water output pipe 51 is inserted downwards into the purified water input port 2211, and the lower end of the purified water output pipe 51 is communicated with a gap between the inner side surface of the inner cylinder 23 and the outer side surface of the rear activated carbon filter element 6;

the inner side surface of the purified water input pipe 221 surrounds the outer side surface of the purified water output pipe 51, and the top surface of the upper end part of the purified water input pipe 221 is abutted against the lower bottom surface of the ultrafiltration membrane filter element 5.

As shown in fig. 5, the outlet end of the ultrafiltration membrane cartridge 5 and the initial end of the post-activated carbon cartridge 6 can be communicated through the purified water outlet line 51 and the purified water inlet 2211, so as to keep the purification process of the water purification apparatus using the ultrafiltration membrane cartridge continuously operated.

The inside surface of the purified water input pipe 221 surrounds the outside surface of the purified water output pipe 51, and the top surface of the upper end part of the purified water input pipe 221 is abutted against the lower bottom surface of the ultrafiltration membrane filter element 5, so that the connection between the ultrafiltration membrane filter element 5 and the rear activated carbon filter element 6 is more stable, and the operation stability is better.

Further, the inner lower shell 21 is provided with a purified water output pipe 211, and the middle part of the inner lower shell 21 extends downwards to form the purified water output pipe 211;

the upper end of the purified water output pipe 211 extends upwards and protrudes outwards from the top surface of the inner lower shell 21, the lower end of the rear activated carbon filter element 6 is abutted against the top surface of the inner lower shell 21, and the inner side surface of the rear activated carbon filter element 6 is abutted against the outer side surface of the upper end part of the purified water output pipe 211;

the purified water output port 2111 is located at the lower end of the purified water output tube 211, and the filtering end of the rear activated carbon filter element 6 is communicated with the outside through the purified water output tube 211.

As shown in fig. 3, the lower end of the rear activated carbon filter element 6 abuts against the top surface of the inner lower casing 21, and the inner side surface of the rear activated carbon filter element 6 abuts against the outer side surface of the upper end of the purified water output pipe 211, so that the installation stability of the rear activated carbon filter element 6 can be improved.

Further, the device also comprises a middle cover 12, wherein the middle cover 12 is arranged at the top of the rear activated carbon filter element 6;

the bottom surface of the middle cover 12 covers and abuts against the top surface of the rear activated carbon filter element 6, the edge of the middle cover 12 extends downwards and surrounds the upper end of the rear activated carbon filter element 6, and the inner side surface of the edge of the middle cover 12 abuts against the outer side surface of the upper end part of the rear activated carbon filter element 6;

the middle cover 12 is located below the purified water input pipe 221, a gap is arranged between the middle cover 12 and the lower end of the purified water input pipe 221, and the gap between the middle cover 12 and the lower end of the purified water input pipe 221 is communicated with the gap between the inner side surface of the inner cylinder 23 and the outer side surface of the rear active carbon filter element 6.

As shown in fig. 3 and 5, the bottom surface of the middle cover 12 covers and abuts against the top surface of the rear activated carbon filter element 6, so that the top surface of the rear activated carbon filter element 6 is prevented from being exposed upwards, and purified water at the filtering end of the inner side surface of the rear activated carbon filter element 6 is prevented from being polluted.

The gap between the middle cover 12 and the lower end of the purified water input pipe 221 is beneficial for the output purified water to flow into the gap between the inner side surface of the inner cylinder 23 and the outer side surface of the rear activated carbon filter element 6, namely the initial filtering end of the rear activated carbon filter element 6, so as to ensure the smooth filtering of the purified water.

Further, an upper cover 9 is also included;

the upper cover 9 is detachably sleeved on the tops of the primary filter element 3, the preposed activated carbon filter element 4 and the ultrafiltration membrane filter element 5;

the bottom surface of the upper cover 9 covers and abuts against the top surfaces of the primary filter element 3 and the front activated carbon filter element 4, the middle part of the upper cover 9 is recessed downwards and abuts against the top surface of the ultrafiltration membrane filter element 5, the edge of the upper cover 9 extends downwards and surrounds the upper end part of the primary filter element 3, and the inner side surface of the edge of the upper cover 9 abuts against the outer side surface of the upper end part of the primary filter element 3;

the top surface of the upper cover 9 is abutted against the inner top surface of the shell 1.

As shown in fig. 1 to 4, the upper ends of the primary filter element 3, the pre-activated carbon filter element 4 and the ultrafiltration membrane filter element 5 have good installation stability, so that the operation stability of the water purification apparatus using the ultrafiltration membrane filter element can be ensured, the top surface of the upper cover 9 is abutted against the inner top surface of the housing 1, and the upper cover 9 can be detached, thereby facilitating the maintenance, cleaning and replacement of the primary filter element 3, the pre-activated carbon filter element 4 and the ultrafiltration membrane filter element 5.

Further, the shell 1 is provided with a water inlet and outlet pipe 11;

the water inlet and outlet pipe 11 is positioned at the lower end of the shell 1, and the inner side surface of the water inlet and outlet pipe 11 surrounds the outer side surface of the purified water output pipe 211;

a gap is arranged between the inner side surface of the water inlet and outlet pipe 11 and the outer side surface of the purified water output pipe 211, and the gap between the inner side surface of the water inlet and outlet pipe 11 and the outer side surface of the purified water output pipe 211 is communicated with the filtration starting end of the primary filter element 3;

the device also comprises an output check valve 7 and an input check valve 8;

the output check valve 7 is installed at the purified water output port 2111, and the output check valve 7 is a check valve which is internally communicated in a one-way manner; the input check valve 8 is arranged between the inner side surface of the water inlet and outlet pipe 11 and the outer side surface of the purified water output pipe 211.

As shown in fig. 1, the input of the water to be purified or the output of the purified water of the water purifying apparatus using the ultrafiltration membrane filter element can be controlled by the output check valve 7 and the input check valve 8 respectively, when the water purifying apparatus using the ultrafiltration membrane filter element is dismounted for maintenance, the water inlet and outlet pipe 11 and the purified water output pipe 211 can not leak water, and the cleaning work of maintenance personnel can be avoided.

Specifically, the lower end surfaces of the primary filter element 3 and the front activated carbon filter element 4 are adjacently abutted against the top surface of the inner lower shell 21 exposed outside the inner cylinder 23;

the edge of the inner lower shell 21 extends upwards to surround the lower end part of the primary filter element 3, and the inner side surface of the edge of the inner lower shell 21 is abutted against the outer side surface of the lower end part of the primary filter element 3;

a gap is arranged between the outer side surface of the edge of the inner lower shell 21 and the inner side surface of the shell 1, and the filtration starting end of the primary filter element 3 is communicated with the upper end of the input check valve 8 through the gap between the outer side surface of the edge of the inner lower shell 21 and the inner side surface of the shell 1.

As shown in fig. 1, the lower end surfaces of the primary filter element 3 and the front activated carbon filter element 4 both abut against the top surface of the inner lower shell 21 exposed outside the inner cylinder 23, and the inner side surface of the edge of the inner lower shell 21 abuts against the outer side surface of the lower end portion of the primary filter element 3, so that the lower ends of the primary filter element 3 and the front activated carbon filter element 4 have better installation stability.

The initial filtering end of the primary filter element 3 is communicated with the upper end of the input check valve 8 through a gap between the outer side surface of the edge of the inner lower shell 21 and the inner side surface of the shell 1, and the initial filtering end of the water to be purified of the water purifying device using the ultrafiltration membrane filter element, which flows into the primary filter element 3, can be effectively controlled through the input check valve 8.

In summary, as shown in the embodiments of the present invention shown in fig. 1-5, the ultrafiltration membrane is disposed in the water purifying apparatus using the ultrafiltration membrane filter element, so as to remove impurities in the water to be purified, and retain trace elements and minerals beneficial to human body in the water to be purified, and the water purifying apparatus is suitable for further filtering and purifying mineral water or drinking water, and has the advantages of compact structure, large flow capacity and high purification efficiency.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A water purifying device using an ultrafiltration membrane filter element is characterized by comprising an outer shell, an inner shell, a preposed activated carbon filter element, an ultrafiltration membrane filter element and a postpositional activated carbon filter element;

the inner shell is arranged in the outer shell, and the preposed activated carbon filter element and the ultrafiltration membrane filter element are both arranged between the inner side surface of the outer shell and the outer side surface of the inner shell; the front activated carbon filter element is sleeved on the outer sides of the ultrafiltration membrane filter element and the inner shell; the rear active carbon filter element is arranged in the inner shell; the rear active carbon filter element is positioned below the ultrafiltration membrane filter element;

the initial filtering end of the front activated carbon filter element is communicated with the filtering end of the initial filtering water, the filtering end of the front activated carbon filter element is communicated with the initial filtering end of the ultrafiltration membrane filter element, the lower end of the ultrafiltration membrane filter element is a purified water output end, and the gap between the outer side surface of the rear activated carbon filter element and the inner side surface of the inner shell is a purified water initial filtering end;

the upper end of the inner shell is provided with a purified water inlet, and the lower end of the inner shell is provided with a purified water outlet;

the upper end of purification water input port with the purification water output of milipore filter core is linked together, the lower extreme of purification water input port with the pure water is first strained and is held the intercommunication mutually, the medial surface of rearmounted active carbon filter core is the pure water and strains the end, the upper end of pure water delivery outlet with the pure water of rearmounted active carbon filter core filters out the end and communicates mutually, the lower extreme and the external world of pure water delivery outlet are linked together.

2. The water purification apparatus using an ultrafiltration membrane cartridge of claim 1, further comprising a primary cartridge;

the primary filter element is a PP cotton filter element, a microporous ceramic sintered filter element, a microporous diatomite sintered filter element or a microporous molecular sieve sintered filter element;

the outer side surface of the primary filter element is a filter starting end, and the inner side surface of the primary filter element is a filter end;

the primary filter element is sleeved on the outer side of the front active carbon filter element.

3. The water purification apparatus using an ultrafiltration membrane cartridge of claim 1, wherein the ultrafiltration membrane cartridge is filled with a hollow fiber tube having ultrafiltration pores with a pore size of less than 0.01 μm.

4. The water purifying apparatus using an ultrafiltration membrane cartridge of claim 2, wherein the inner housing comprises an inner lower housing, an inner upper housing, and an inner cylinder;

the upper end of the inner cylinder body is in threaded connection with the edge of the inner upper shell, which extends downwards, and the lower end of the inner cylinder body is connected with the middle part of the inner lower shell;

the medial surface of interior barrel surrounds the lateral surface of rearmounted active carbon filter core, the medial surface of interior barrel with be equipped with the clearance between the lateral surface of rearmounted active carbon filter core.

5. The water purifying apparatus using an ultrafiltration membrane cartridge of claim 4, wherein the middle portion of the inner upper case is provided with a purified water input pipe extending upward;

the purified water input port is arranged at the upper end part of the purified water input pipe;

the bottom of the ultrafiltration membrane filter element is provided with a purified water output pipe extending downwards, and the purified water output pipe is positioned at the purified water output end of the ultrafiltration membrane filter element; the upper end of the purified water output pipe is communicated with the filtering end of the ultrafiltration membrane filter element; the lower end of the purified water output pipe is downwards inserted into the purified water input port, and the lower end of the purified water output pipe is communicated with a gap between the inner side surface of the inner cylinder and the outer side surface of the rear activated carbon filter element;

the inner side surface of the purified water input pipe surrounds the outer side surface of the purified water output pipe, and the top surface of the upper end part of the purified water input pipe is abutted against the lower bottom surface of the ultrafiltration membrane filter element.

6. The water purifying apparatus using an ultrafiltration membrane cartridge as claimed in claim 4, wherein the inner lower case is provided with a purified water outlet pipe, and a middle portion of the inner lower case extends downward to form the purified water outlet pipe;

the upper end of the purified water output pipe extends upwards and protrudes outwards from the top surface of the inner lower shell, the lower end of the rear activated carbon filter element is abutted against the top surface of the inner lower shell, and the inner side surface of the rear activated carbon filter element is abutted against the outer side surface of the upper end part of the purified water output pipe;

the purified water output port is positioned at the lower end part of the purified water output pipe, and the filtering end of the rear activated carbon filter element is communicated with the outside through the purified water output pipe.

7. The water purification apparatus using an ultrafiltration membrane cartridge according to claim 5, further comprising a middle cap installed on the top of the rear activated carbon cartridge;

the bottom surface of the middle cover covers and abuts against the top surface of the rear activated carbon filter element, the edge of the middle cover extends downwards and surrounds the upper end of the rear activated carbon filter element, and the inner side surface of the edge of the middle cover abuts against the outer side surface of the upper end part of the rear activated carbon filter element;

the middle cover is positioned below the purified water input pipe, a gap is arranged between the middle cover and the lower end of the purified water input pipe, and the gap between the middle cover and the lower end part of the purified water input pipe is communicated with the gap between the inner side surface of the inner cylinder and the outer side surface of the rear activated carbon filter element.

8. The water purifying apparatus using an ultrafiltration membrane cartridge according to claim 2, further comprising an upper cover;

the upper cover is detachably sleeved on the tops of the primary filter element, the preposed activated carbon filter element and the ultrafiltration membrane filter element;

the bottom surface of the upper cover covers and abuts against the top surfaces of the primary filter element and the preposed activated carbon filter element, the middle part of the upper cover is downwards sunken and abuts against the top surface of the ultrafiltration membrane filter element, the edge of the upper cover downwards extends and surrounds the upper end part of the primary filter element, and the inner side surface of the edge of the upper cover abuts against the outer side surface of the upper end part of the primary filter element;

the top surface of the upper cover is abutted against the inner top surface of the shell.

9. The water purification apparatus using an ultrafiltration membrane cartridge of claim 6, wherein the housing is provided with water inlet and outlet pipes;

the water inlet and outlet pipe is positioned at the lower end of the shell, and the inner side surface of the water inlet and outlet pipe surrounds the outer side surface of the purified water output pipe;

a gap is arranged between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe, and the gap between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe is communicated with the filtration starting end of the primary filter element;

the device also comprises an output check valve and an input check valve;

the output check valve is arranged at the purified water output port and is a check valve which is internally communicated in a one-way manner; the input check valve is installed between the inner side surface of the water inlet and outlet pipe and the outer side surface of the purified water output pipe.

10. The water purifying device using the ultrafiltration membrane cartridge as claimed in claim 9, wherein the lower end surfaces of the primary cartridge and the pre-activated carbon cartridge are adjacently abutted against the top surface of the inner lower casing exposed to the outside of the inner cylinder;

the edge of the inner lower shell extends upwards to surround the lower end part of the primary filter element, and the inner side surface of the edge of the inner lower shell is abutted against the outer side surface of the lower end part of the primary filter element;

and a gap is arranged between the outer side surface of the edge of the inner lower shell and the inner side surface of the shell, and the filtration starting end of the primary filter element is communicated with the upper end of the input check valve through the gap between the outer side surface of the edge of the inner lower shell and the inner side surface of the shell.

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