CN219136471U

CN219136471U - Integrated roll-type membrane filter element with stage-type filtering function and water purifier

Info

Publication number: CN219136471U
Application number: CN202320160989.7U
Authority: CN
Inventors: 李友铃; 周曌; 张量; 董小虎; 张可可; 侯桂林
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-06-06
Anticipated expiration: 2033-01-18

Abstract

The utility model provides an integrated roll-type membrane filter core with a stage-type filtering function and a water purifier, wherein the integrated roll-type membrane filter core comprises the following components: the membrane is an integral membrane and is rolled on the periphery of the central tube, the membrane comprises an axial first end and an axial second end along the axial direction of the central tube, the glue line comprises a section separation glue line arranged between the axial first end and the axial second end before rolling so as to separate the membrane into a first section filter element and a second section filter element in a stage mode, the membrane is trimmed along the direction of the section separation glue line after being rolled on the central tube so as to separate the first section filter element from the second section filter element, the membrane is further radially inwards cut off the central tube, and the two cut-off sections of central tube are connected through the connecting piece to form a space. The utility model can improve the utilization rate of the membrane and effectively reduce the rejection rate of the filter element in the membrane repairing process.

Description

Integrated roll-type membrane filter element with stage-type filtering function and water purifier

Technical Field

The utility model belongs to the technical field of water purification, and particularly relates to an integrated roll-type membrane filter element with a stage-type filtering function and a water purifier.

Background

The long service life is taken as the development trend of the water purifier, and the implementation way mainly comprises the addition of a chemical scale inhibitor, the serial connection of a plurality of coiled membranes to form stage filtration and the like. However, although both of the above techniques can achieve a long life, they have the following problems:

problem 1: the chemical scale inhibitor is added to realize good scale inhibition effect and prolong the service life of the filter element, but the problem of sanitation and safety caused by release of scale inhibition substances exists;

problem 2: compared with a single-stage rolled film filter element, the service life of the whole stage technology of the series connection of a plurality of rolled film filter elements can be improved to a certain extent, but the technical route is to be optimized for the household machine pursuing the volume. The applicant of the present utility model filed 2022103018425, which adopts a mode of rolling a whole filter element by a central tube, adopts a film trimming process to divide the film into at least two after film making, and through verification, the technical effect of the method can realize the service life increase of the filter element. However, when the film is repaired, a gap needs to be reserved, so that the film repairing process needs to occupy the width of the adhesive, the adaptability of the film repairing process to the winding deviation of the adhesive wire in the winding process is reduced, the condition of low film repairing qualification rate exists, and the condition of higher rejection rate of filter elements (including components such as a diaphragm, a central tube and the like) exists.

Because the stage type filter element component in the prior art has the technical problems that the membrane utilization rate can not be improved simultaneously, the rejection rate of the filter element can be reduced, and the like, the utility model designs the integrated roll type membrane filter element with the stage type filtering function and the water purifier.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect that the prior art cannot improve the membrane utilization rate and reduce the rejection rate of the filter element at the same time, thereby providing the integrated roll-type membrane filter element with the stage-type filtering function and the water purifier.

The utility model provides an integrated roll-type membrane filter core with a stage-type filtering function, which comprises the following components:

the membrane is an integral membrane and is rolled on the periphery of the central tube, the membrane comprises an axial first end and an axial second end along the axial direction of the central tube, the glue line comprises a section separation glue line arranged between the axial first end and the axial second end before rolling so as to divide the membrane into a first section filter element and a second section filter element in a stage mode, after the membrane is rolled on the central tube, the first section filter element and the second section filter element are separated along the direction of the section separation glue line by being trimmed, the membrane is further towards the radial inner side and is cut off from the central tube, and the two cut-off sections of central tube are connected through the connecting piece to form a space.

In some embodiments, the membrane is folded to form two opposite front surfaces and two opposite back surfaces, a raw water flow channel is formed between the two opposite front surfaces, and a pure water flow channel is formed between the adjacent back surfaces; the inter-section separation glue line is arranged on the back surface of the folded membrane to seal and separate pure water flow channels of the two sections of filter elements; the first section filter element comprises a first raw water flow passage formed between two opposite front surfaces of the first section filter element and a first pure water flow passage positioned at the back surface of the first section filter element, and the second section filter element comprises a second raw water flow passage formed between two opposite front surfaces of the second section filter element and a second pure water flow passage positioned at the back surface of the second section filter element; the outlet of the first raw water flow passage is communicated with the inlet of the second raw water flow passage.

In some embodiments, the membrane is folded to form a folded edge, a first long side and a second long side and an open end, the folded edge is rolled towards the central tube, the first long side is positioned at the first axial end, the second long side is positioned at the second axial end, one end of the inter-section separation glue line extends to be connected with the folded edge, and in the membrane repairing process, the inter-section separation glue line is cut from the middle to form an inter-section separation glue line I positioned on the first section filter element and an inter-section separation glue line II positioned on the second section filter element;

The glue line also comprises a filter element-glue line arranged on the back surface of the first section of filter element, wherein the filter element-glue line and the inter-section separation glue line enclose the first pure water flow channel, and the opening of the first pure water flow channel faces the folded edge;

the glue line also comprises a second filter element glue line arranged on the back surface of the second section filter element, the second filter element glue line and the second inter-section separation glue line form a second pure water flow passage in a surrounding mode, and an opening of the second pure water flow passage faces to the folded edge.

In some embodiments, the first filter element glue line comprises a first filter element glue line and a second filter element glue line, the first filter element glue line is arranged at a position close to the first long side relative to the second long side, the first filter element glue line is arranged at a position close to the opening relative to the folded edge, the first filter element glue line extends from the folded edge to be two adjacent to the first filter element glue line, one end of the second filter element glue line is connected with the first filter element glue line, and the other end of the second filter element glue line is connected with the first inter-segment separation glue line;

the second filter element glue line comprises a first filter element glue line and a second filter element glue line, the first filter element glue line is arranged relative to the first long edge and close to the second long edge, the second filter element glue line is arranged relative to the folded edge and close to the opening end, the first filter element glue line extends from the folded edge to the second filter element glue line to be connected, one end of the second filter element glue line is connected with the first filter element glue line, and the other end of the second filter element glue line is connected with the second inter-section separation glue line.

In some embodiments, in the plane of the membrane expansion, the first glue line of the filter element, the first separation glue line between the segments and the first glue line of the filter element are all arranged in parallel and are perpendicular to the central axis of the central tube, and the second glue line of the filter element are located on the same straight line and are parallel to the central axis of the central tube.

In some embodiments, in the membrane repair process, the first filter element glue line and the second filter element glue line are sequentially or simultaneously membrane repair cut, and the first filter element glue line and the second filter element glue line are sequentially or simultaneously membrane repair cut.

In some embodiments, after the membrane 2 is rolled up to the central tube 1 and before the membrane 2 is trimmed, a glue curing step is further provided, and after the glue line is set and the preset time is continued, the rolled membrane 2 is trimmed.

In some embodiments, the central tube is provided with a first pure water diversion hole and a second pure water diversion hole, the first pure water diversion hole and the second pure water diversion hole penetrate from the outer wall to the inner wall of the central tube, the first pure water diversion hole is opposite to the first section of filter element, the second pure water diversion hole is opposite to the second section of filter element, the first pure water flow channel is communicated with the first pure water diversion hole, and the second pure water flow channel is communicated with the second pure water diversion hole.

In some embodiments, a distance between the nearest first pure water guide hole and the nearest second pure water guide hole in an axial direction of the center tube is greater than 2 times or more a width of the intersegmental separation gel line.

In some embodiments, the first central tube section and the second central tube section are cut to form a broken first central tube section and a broken second central tube section when the central tube is trimmed, and the connecting piece is arranged between the first central tube section and the second central tube section and connects the first central tube section and the second central tube section into a whole;

the first central pipe section and the second central pipe section are arranged at intervals, the connecting piece comprises a connecting main body and a protrusion, the protrusion is arranged on the peripheral wall of the connecting main body and protrudes outwards, and the protrusion is clamped at an interval position between the first central pipe section and the second central pipe section.

In some embodiments, the connecting body is a cylindrical structure, the protrusion divides the connecting body into a first connecting body and a second connecting body, the first connecting body is located at one axial side of the protrusion, the second connecting body is located at the other axial side of the protrusion, the first connecting body is arranged in the first central pipe section in a penetrating manner, and the second connecting body is arranged in the second central pipe section in a penetrating manner;

And/or the bulge is an annular structure or a plurality of structures arranged at intervals on the peripheral wall of the connecting main body, and the outer diameter of the bulge is flush with the outer diameter of the central tube.

In some embodiments, after the central tube is cut and the connecting member is disposed between the first central tube segment and the second central tube segment, the first segment filter element and the second segment filter element are disposed at intervals to form a cavity, and a first water sealing member is disposed at a peripheral position of the cavity to seal the cavity relative to the periphery thereof.

The utility model also provides a water purifier which comprises the integrated roll-type membrane filter element with the stage-type filtering function.

The integrated roll-type membrane filter element with the stage-type filtering function and the water purifier provided by the utility model have the following beneficial effects:

according to the utility model, the inter-section separation glue line is arranged between the first axial end and the second axial end of the membrane before the membrane is rolled, the membrane is cut into the first section filter core and the second section filter core along the separation glue line by the membrane repairing process after the membrane is rolled onto the central tube, the central tube is further cut into at least two sections inwards, and the two sections of central tubes are connected through the connecting piece after the membrane is cut, so that a space is formed between the two sections of central tubes, an effective separation cavity is effectively formed between the first section filter core and the second section filter core, raw water in the first section filter core enters the separation cavity after being filtered, and then enters the second section filter core for filtering, so that a stage type filtering effect is effectively formed, compared with the prior art, a certain length of membrane is not reserved between the two sections of filter core membranes for cutting to form a separation cavity, the cutting area is greatly reduced, the utilization rate of the membrane is improved, the adaptability to the conditions such as rolling deflection is greatly increased, the utilization rate of the membrane in the manufacturing stage filter core membrane manufacturing process (particularly the membrane rejection rate of the filter core is also reduced), and the rejection rate of the membrane in the filter core manufacturing stage filter core manufacturing process is also reduced.

Drawings

FIG. 1 is a schematic view of the internal structure of a stage cartridge of the present utility model;

FIG. 2 is a flow path structure diagram of the interior of the stage cartridge of the present utility model;

FIG. 3a is a block diagram of a water seal of a stage cartridge of the present utility model;

FIG. 3b is a block diagram of a second water seal of the stage cartridge of the present utility model;

FIG. 4 is a block diagram of a connector for a stage cartridge of the present utility model;

FIG. 5 is a block diagram of the center tube of the stage cartridge of the present utility model prior to cutting;

FIG. 6 is a diagram showing the structure of the glue line arrangement of the stage filter element before film rolling;

fig. 7 is a film repair (cutting) flow chart of the stage filter element of the present utility model after film rolling.

The reference numerals in the drawings are as follows:

1. a central tube; 11. pure water diversion holes I; 12. pure water diversion holes II; 13. a first center tube segment; 14. a second center tube segment; 15. a water-stop plate; 16. a groove III; 17. a pure water outlet; 2. a membrane; 21. a first section of filter element; 22. a second section of filter element; 23. an axial first end; 24. an axial second end; 25. folding edges; 26. an open end; 3. a glue line; 31. separating glue lines between the sections; 32. a first filter element and a first glue line; 33. a first filter element and a second filter element are connected through a glue line; 34. a first filter element adhesive line; 35. a second glue line of the filter element II; 4. a connecting piece; 41. a connecting body; 42. a protrusion; 43. a groove I; 5. a cavity; 61. a first water sealing piece; 611. positioning columns; 612. ribs; 613. a first rubberizing surface; 62. a second water sealing piece; 621. the rib I; 622. the second rib is a rib; 623. a second groove; 624. a second rubberizing surface; 7. a filter bottle body; 8. a filter bottle cap; 9. and (5) a water inlet grid.

Detailed Description

The utility model provides an integrated roll-type membrane filter core with a stage-type filtering function and a structure thereof, and according to the structural characteristics of the integrated roll-type membrane filter core, the stage-type function which can be realized is not limited to one stage and two stages, but also comprises three stages or even more stages. The utility model mainly relates to a filter element structure and a waterway for realizing one-stage two-stage functions by the same central tube and a manufacturing method thereof, and specifically comprises the following steps:

fig. 1 is a composition of a staged cartridge assembly comprising:

the filter bottle part comprises a filter bottle body and a filter bottle cover. One end of the filter flask body is provided with three water gaps, wherein one water gap is an inlet for raw water to enter the filter element assembly; the second water gap is a pure water outlet of the stage type filter element assembly; the third water gap is a concentrated water outlet of the stage filter element; the first surface of the filter bottle body 7 is used for extruding and sealing water after a sealing ring is arranged with a groove of the second water sealing piece 62; the second surface of the filter bottle body 7 is used for extruding and sealing water after a sealing ring is arranged with a groove III 16 of the central tube; the filter bottle cap 8 is used for realizing sealing water with the filter bottle body 7 through spin-melting connection or threaded connection, and the inner wall of the filter bottle cap is provided with a groove for centering during filter element installation.

Fig. 2 is a schematic waterway diagram of a stage filter element assembly, water inlet of the filter element enters from a raw water port, enters into a water inlet end face of the first section filter element 21 along the outer walls of the second section filter element 22 and the first section filter element 21, enters into the filter element from the end face to be purified, pure water is collected and discharged through a central tube, concentrated water of the first section filter element 21 is taken as water inlet of the second section filter element 22 to enter into the end face of the second section filter element 22 along the middle of the two sections filter elements to be purified, pure water is also collected and discharged through the central tube, and concentrated water is discharged through a concentrated water outlet.

As shown in fig. 1-7, the present utility model provides an integrated roll-type membrane cartridge with a stage filtration function, comprising:

the membrane 2 is an integral membrane and is rolled on the periphery of the central tube 1, the membrane 2 comprises an axial first end 23 and an axial second end 24 along the axial direction of the central tube 1, the glue line 3 comprises a section separation glue line 31 arranged between the axial first end 23 and the axial second end 24 before rolling so as to separate the membrane 2 into a first section filter element 21 and a second section filter element 22 in a step mode, the membrane 2 is trimmed along the direction of the section separation glue line 3 after being rolled on the central tube 1 so as to separate the first section filter element 21 from the second section filter element 22, and the central tube 1 is further cut towards the radial inner side, and the two sections of the central tube 1 after cutting are connected (detachably connected or non-detachably connected) through the connecting piece 4 to form a gap.

In order to solve the problem that the technology of the stage filter element with a plurality of filter elements connected in series has larger volume, the utility model provides a stage filter roll type membrane filter element structure which is formed by sharing a central tube in a manufacturing stage and connecting the filter elements into a whole after the manufacturing is finished.

The core utility model points of the utility model are as follows: firstly, rolling and then cutting, cutting off the diaphragm, and then cutting off the central tube integrally, wherein compared with the existing case of not cutting off the central tube, the central tube also needs to reserve the space of the diaphragm to form a cavity between filter cores, the diaphragm area is excessively cut off, the diaphragm utilization rate is low, and the diaphragm is scrapped due to the fact that the diaphragm is often biased; according to the utility model, the diaphragm and the central tube are directly cut off, and a part of the diaphragm is not required to be cut off to form a cavity, so that the utilization rate of the diaphragm area is increased, the adaptability to rolling deflection is increased, and the rejection rate is reduced.

Compared with the prior art, the utility model only needs to beat one inter-section separation glue line.

The traditional stage filter core technology is that a plurality of filter cores are connected in series, taking a one-stage two-stage filter core as an example, the problems existing in the technology include:

1) The two sections of filter elements are manufactured independently, the manufacturing process comprises blanking, film rolling, film repairing and the like, and the process is long in time consumption;

2) The two sections of filter cores respectively use a supporting central tube, so that materials are used more;

3) The two filter elements are required to realize the stage-type filtering function, and the way comprises: a. each filter element uses one membrane shell, the number of the membrane shells is large, the whole machine volume is large, meanwhile, the connecting pipe between the water inlet and outlet of the filter element is increased, and the reliability is reduced; b. the two sections of filter elements are arranged in series on one membrane shell, and the membrane shell is too long, so that the whole machine design is not facilitated; c. two filter cores are manufactured independently, each filter core is provided with 2 glue lines along the direction of the central tube, the two filter cores are provided with 4 glue lines, the glue lines occupy large membrane area, the membrane utilization rate is low, and the membrane area consumption is required to be increased for realizing performance indexes.

Aiming at the problems of the filter element realizing the stage-type filtering function, the stage-type filter element technology can well solve the problems, and takes a one-stage two-stage filter element as an example, and has the following specific characteristics and beneficial effects:

1) And synchronously rolling the filter element. The materials such as the membrane, the central tube and the like in the rolling process of the two sections of filter elements are shared and can be formed in one step, so that the two filter elements can be omitted from being rolled separately for twice blanking and twice rolling processes, and the process time is short;

2) The film dosage is small. When the two sections of filter elements are manufactured, the central tube is shared, only one glue line is needed to be arranged in the middle of the membrane for realizing the stage function, only 3 glue lines are needed to be perpendicular to the direction of the central tube, the occupied membrane area of glue is low, and the membrane consumption can be reduced;

3) The filter element is provided with a common filter flask. After the rolling of the two sections of filter elements is completed, the filter elements are made into two sections physically through membrane repair and are connected through connecting pieces, the whole length of the filter elements is unchanged, and the filter elements can be arranged in one membrane shell;

4) The water quality is safe. Compared with a scale inhibitor means, the high-recovery filter element technology is realized, and the sanitary and safety problems caused by release of scale inhibiting substances do not exist in the stage filter element technology;

5) And the service life of the filter element is prolonged. Compared with a single filter element, the high water yield is realized by improving the recovery rate, the proportion of the stage-type filter element is different, the flow rate of the water inlet film surface of the second-stage filter element is adjustable, and meanwhile, the scaling limit can be realized under the action of the cavity area between stages and the water flow driving force, so that the service life of the filter element is effectively prolonged.

The utility model provides an integrated roll-type membrane filter element with a stage-type filtering function, which comprises the following components: 1) The two sections of filter elements are manufactured by coiling materials such as a central tube, a membrane and the like at the stage of manufacturing the filter elements into one-step molding; 2) The core points for realizing the stage-type filtering function comprise gluing to realize waterway separation and membrane repairing to realize physical separation of two sections of filter elements, and then the two sections of filter elements are integrated again through a connecting piece to have the stage-type filtering function; 3) The synchronous manufacturing characteristics enable the two sections of filter elements to be perpendicular to the direction of the central tube and only need 3 glue lines when the filter elements are manufactured, the occupied area of the glue lines is low, the consumption of the film can be reduced or the utilization rate of the film can be improved; 4) The filter element membrane repairing process comprises two steps of cutting the filter element into physical segments along the inter-segment separation glue lines, and the middle cutting has the advantages that the single-blade cutting glue lines are used for two segments of filter elements, no waste is caused, and the filter element qualification rate (later mentioned) in the membrane repairing process can be improved; 5) A cavity area is reserved between the two sections of filter elements connected with the rear section, so that the filter elements have the membrane surface scaling limiting area characteristic; meanwhile, the proportion of the two sections of filter elements is adjusted, so that the flow rate of the water inlet end surface film surface of the second section of filter element 22 can be adjusted, and the service life of the filter element can be prolonged under the combined action. Compared with the prior art that a plurality of filter elements are connected in series to realize the stage type filtering function, the stage type filter element provided by the utility model is synchronously molded and is installed by a single membrane shell, so that the labor and the volume are saved.

The difference between the utility model compared with the prior art is mainly in the membrane repairing stage and the filter core when the filter core acts. When the membrane is repaired, the two sections of filter elements are cut off by a cutter together with the membrane and the central tube at the position of the two sections of filter element parting gel lines, the two sections of filter elements are divided into two after being cut off, and then the two sections of filter elements are connected into a whole by a double-head connecting piece; when the membrane is repaired by the earlier scheme, a gap (two cutters are completed) needs to be cut around the two sections of filter element parting lines, and the central tube is not cut off, namely the two sections of filter elements are still on the same central tube after the membrane is repaired. Compared with the prior proposal, the method has the advantages that no gap is reserved during film repair, the adhesive width is not occupied, and the film repair qualification rate can be improved.

In some embodiments, the membrane 2 is folded to form two opposite front surfaces and two opposite back surfaces, a raw water flow channel is formed between the two opposite front surfaces, and a pure water flow channel is formed between the adjacent back surfaces; the inter-section separation glue line 31 is arranged on the back surface of the folded membrane 2 so as to seal and separate pure water flow passages of the two sections of filter elements; the first section filter element 21 includes a first raw water flow passage formed between two opposite front surfaces thereof and a first pure water flow passage located at a rear surface of the first section filter element 21, and the second section filter element 22 includes a second raw water flow passage formed between two opposite front surfaces thereof and a second pure water flow passage located at a rear surface of the second section filter element 22; the outlet of the first raw water flow channel is communicated with the inlet of the second raw water flow channel; the raw water can sequentially enter the first raw water flow passage and the second raw water flow passage for filtering.

The membrane is formed by the membrane, the two stages of filter elements are formed by the membrane, the pure water flow passage of the two stages of filter elements, the raw water flow passage and the inter-stage separation gel line are preferably connected, namely, the first and the second stages of filter elements are formed by cutting from the inter-stage separation gel line in the membrane repairing process, the inter-stage separation gel line is used for cutting and dividing the first pure water flow passage and the second pure water flow passage, the first pure water flow passage and the second pure water flow passage can be effectively sealed respectively, namely, the rest of the inter-stage separation gel line after cutting can achieve the sealing effect, the outlet of the first raw water flow passage of the first stage of filter elements is communicated with the inlet of the second raw water flow passage of the second stage of filter elements, raw water can enter the second raw water flow passage again for filtering and purifying after being filtered by the first stage of filter elements, at least two stages of stage type filter elements are formed, the water purifying rate is improved, meanwhile, the flow rate of water can be increased by the spacing cavity is also formed between the two stages of filter elements, the water flow rate can be reduced, the water concentration polarization can be reduced, and the service life of the filter elements can be prolonged.

In some embodiments, the membrane 2 is folded to form a folded edge 25, a first long edge and a second long edge and an open end 26, the folded edge 25 is rolled towards the central tube 1 (i.e. the folded edge is attached to the central tube or rolled close to the central tube, different from the way the open end is rolled towards the central tube), the first long edge is located at the first axial end 23, the second long edge is located at the second axial end 24, one end of the inter-section parting bead 31 extends to be connected with the folded edge 25, and during the membrane repair, the inter-section parting bead 31 is cut from the middle to form an inter-section parting bead first located on the first section filter element 21 and an inter-section parting bead second located on the second section filter element 22;

The glue line 3 further comprises a first filter element glue line arranged on the back surface of the first section filter element 21, the first filter element glue line and the first section separation glue line enclose the first pure water flow channel, and the opening of the first pure water flow channel faces the folded edge 25;

the glue line 3 further comprises a second filter element glue line arranged on the back surface of the second section filter element 22, the second filter element glue line and the second inter-section separation glue line form a second pure water flow channel, and an opening of the second pure water flow channel faces the folded edge 25.

The membrane is a preferable folding mode before rolling and a preferable cutting mode after rolling, the folded edge formed by folding is attached to the central tube, so that raw water can enter a raw water flow passage on the front side of the membrane, and the raw water permeates into a pure water flow passage on the back side to form pure water, and enters the interior of the central tube at the folded edge; the first and second pure water channels can be sealed respectively by the residual first and second section separation glue lines on the first and second section filter elements after cutting, and pure water is effectively guided towards the central tube at the folded edge, so that the membrane utilization rate is improved, the cutting of the membrane area is reduced, the effective sealing of the two pure water channels is ensured, the adaptability to the conditions of rolling deviation and the like in the rolling process is stronger, and the rejection rate of the filter element is reduced.

In some embodiments, the first filter element glue line comprises a first filter element glue line 32 and a second filter element glue line 33, the first filter element glue line 32 is disposed near the first long side relative to the second long side, the second filter element glue line 33 is disposed near the open end 26 relative to the folded edge 25, the first filter element glue line 32 extends from the folded edge 25 to be connected with the second filter element glue line 33, one end of the second filter element glue line 33 is connected with the first filter element glue line 32, and the other end is connected with the first inter-segment separation glue line;

the second filter element glue line comprises a first filter element glue line 34 and a second filter element glue line 35, the first filter element glue line 34 is arranged close to the second long edge relative to the first long edge, the second filter element glue line 35 is arranged close to the opening end 26 relative to the folded edge 25, the first filter element glue line 34 extends from the folded edge 25 to be connected with the second filter element glue line 35, one end of the second filter element glue line 35 is connected with the first filter element glue line 34, and the other end of the second filter element glue line 35 is connected with the second inter-section separation glue line.

The filter element I glue line on the first section filter element and the filter element II glue line on the second section filter element are in a preferable structural form, the filter element I glue line can extend in the long side direction of the first section filter element and seal pure water, a raw water inlet is prevented from entering a first pure water flow channel, the filter element I glue line can extend at the opening end of the first section filter element and seal the pure water at the opening end, the pure water in the pure water flow channel is prevented from being mixed with the raw water outside the opening end, and the filter element I glue line I, the filter element I glue line II and the inter-section separation glue line form a U-shaped sealing structure shown in figure 6 so as to effectively guide the water in the first pure water flow channel to the folded edge and enter the central tube; the first filter element second glue line can extend in the long side direction of the second filter element and seal pure water, so that the pure water in the second pure water flow channel is prevented from flowing out from the lower side, the second filter element second glue line can extend at the opening end of the second filter element and seal the pure water at the opening end, the pure water in the pure water flow channel is prevented from being mixed with raw water outside the opening end, and the first filter element second glue line, the second filter element second glue line and the intersegmental separation glue line form a U-shaped sealing structure as shown in fig. 6, so that the water in the second pure water flow channel is effectively guided to the edge folding part and enters the central tube.

In some embodiments, in the plane where the membrane 2 is unfolded, the first filter element glue line 32, the second inter-segment separation glue line 31 and the first filter element glue line 34 are all arranged in parallel and are perpendicular to the central axis of the central tube 1, and the second filter element glue line 33 and the second filter element glue line 35 are located on the same straight line and are parallel to the central axis of the central tube 1. The first filter element glue line, the second filter element glue line and the first filter element glue line are preferably arranged in parallel, are connected from the folded edge and extend, can seal the inlet end of the first filter element, the first filter element and the second filter element and the outlet section of the second filter element, are connected into a straight line and are parallel to the central tube axis, and can seal the opening ends of the first filter element and the second filter element respectively.

The first filter element glue line I, the second filter element glue line II, the first filter element glue line I and the second filter element glue line II are preferably manufactured in an integrated glue-beating mode, a U-shaped structure shown in fig. 6 is formed, and effective sealing between a pure water flow channel and the outside is formed.

In some embodiments, in the film trimming process, the first filter element glue line 32 and the second filter element glue line 33 are sequentially or simultaneously trimmed and cut, and the first filter element glue line 34 and the second filter element glue line 35 are sequentially or simultaneously trimmed and cut. In the film repairing process, besides the film repairing process of the inter-section separation glue line cutting, the film repairing process can be performed on the glue lines at the two ends simultaneously or not simultaneously, and the film repairing process is performed on the glue lines at the opening positions, so that the film after film repairing can be rolled on the central tube to form an integrated filter element structure.

In some embodiments, after the membrane 2 is rolled up to the central tube 1 and before the membrane 2 is trimmed, a glue curing step is further provided, and after the glue line is set and the preset time is continued, the rolled membrane 2 is trimmed. According to the utility model, the glue curing step is further arranged between the glue spraying step and the film repairing step, so that the glue line on the glued film can be effectively cured, especially the films on the back are bonded together, the film repairing is performed after the effective sealing effect is achieved, the effective sealing effect is achieved on the pure water flow channel, and the situation that the pure water flow channel is not tightly sealed and leakage is caused due to the fact that the glue is not cured in the film repairing process is prevented.

In some embodiments, the central tube 1 is provided with a first pure water diversion hole 11 and a second pure water diversion hole 12, the first pure water diversion hole 11 and the second pure water diversion hole 12 penetrate from the outer wall to the inner wall of the central tube 1, the first pure water diversion hole 11 is opposite to the first section of filter element 21, the second pure water diversion hole 12 is opposite to the second section of filter element 22, the first pure water flow channel is communicated with the first pure water diversion hole 11, and the second pure water flow channel is communicated with the second pure water diversion hole 12. The first pure water diversion hole and the second pure water diversion hole are respectively arranged on the central tube and can be respectively communicated with the first pure water flow channel and the second pure water flow channel to lead pure water into the central tube and integrally discharge the pure water to a required position in the central tube.

In some embodiments, a distance between the first pure water guide hole 11 and the second pure water guide hole 12 closest to each other in the axial direction of the center tube 1 is greater than 2 times or more the width of the intersegmental separation gel line 31. The distance between the nearest pure water diversion hole I and the nearest pure water diversion hole II is more than 2 times of the width of the inter-section separation glue line, so that the pure water diversion hole I and the pure water diversion hole II are respectively positioned at two sides of the inter-section separation glue line, the situation that pure water cannot be received due to the fact that the pure water diversion hole I and the pure water diversion hole II are opposite to the inter-section separation glue line is prevented, the tightness of pure water in a central tube is ensured, and pure water leakage or mixing with concentrated water and the like is prevented.

The filter element part comprises a central tube 1, a first section of filter element 21 and a second section of filter element 22 which are rolled on the central tube. The central tube 1 (see fig. 5) comprises a pure water guide hole I11 and a pure water guide hole II 12, wherein the pure water guide hole I11 is mainly used for collecting pure water of a first section of filter element, the pure water guide hole II 12 is mainly used for collecting pure water of a second section of filter element, the number of holes of the two parts of pure water guide holes is more than or equal to 2, a certain interval distance is needed between adjacent holes of the pure water guide hole I11 and the pure water guide hole II 12, and the distance is more than 2 times of the width of a separation glue line between the sections; further comprising a water-stop plate 15 for separating pure water from raw water; groove III 16 for installing O-shaped sealing ring; and a pure water outlet 17 for guiding the collected pure water out. The first section of filter element 21 covers the pure water diversion hole I11 of the central tube; the second section of filter element 22 covers the pure water diversion hole II 12 of the central tube 1.

In some embodiments, the central tube 1 is cut to form a first central tube section 13 and a second central tube section 14 which are broken when being trimmed, and the connecting piece 4 is arranged between the first central tube section 13 and the second central tube section 14 and connects the first central tube section 13 and the second central tube section 14 into a whole;

The first central pipe section 13 and the second central pipe section 14 are arranged at intervals, the connecting piece 4 comprises a connecting main body 41 and a protrusion 42, the protrusion 42 is arranged on the outer peripheral wall of the connecting main body 41 and protrudes outwards, and the protrusion 42 is clamped at an interval position between the first central pipe section 13 and the second central pipe section 14.

The connecting main body adopts a convex structure to effectively separate the two sections of central pipe sections and form a spacing position, so that two sections of filter cores wound on the two sections of central pipe sections are also separated into cavities, water flowing out of the first raw water flow passage enters the cavities first and then enters the second raw water flow passage, the raw water flow rate is improved, concentration polarization is reduced, water scale is reduced, and the service life of the filter cores is prolonged.

In some embodiments, the connecting body 41 has a cylindrical structure (preferably a cylindrical structure), the protrusion 42 divides the connecting body 41 into a first connecting body and a second connecting body, the first connecting body is located on one axial side of the protrusion 42, the second connecting body is located on the other axial side of the protrusion 42, the first connecting body is inserted into the first central pipe section 13, and the second connecting body is inserted into the second central pipe section 14;

And/or, the protrusions 42 are ring-shaped structures or a plurality of structures arranged at intervals on the outer circumferential wall of the connection body 41, and the outer diameter of the protrusions 42 is flush with the outer diameter of the center tube 1.

The connecting main body and the bulge are further optimized in structural form, the bulge divides the connecting main body into two parts, one part is inserted into the first central pipe section, the other part is inserted into the second central pipe section, and the bonding strength between the two central pipe sections is effectively improved; and the bulge is preferably an annular structure or a plurality of block structures arranged at intervals in the circumferential direction, and the outer diameter of the bulge is flush with the outer diameter of the central tube, so that the bulge cannot influence the cavity part, the lifting of the raw water flow rate is ensured, and the anti-scaling effect is improved.

The middle of the first section filter element 21 and the second section filter element 22 also comprises a double-head connecting piece (figure 4), and the function of the double-head connecting piece is mainly to connect the first section filter element 21 and the second section filter element 22 formed after membrane repair to form a whole again, and the double-head connecting piece is an important part for realizing the stage-type filtering function of the two sections filter element. The device specifically comprises a convex feature, wherein the outer diameter of the convex part is the same as the outer diameter of the central tube; and the first groove 43 is used for installing an O-shaped sealing ring and is arranged in the corresponding central tube cavity.

In some embodiments, after the central tube 1 is cut and the connecting member 4 is disposed between the first central tube segment 13 and the second central tube segment 14, the first segment filter element 21 and the second segment filter element 22 are disposed at intervals to form a cavity 5, and a first water sealing member 61 is disposed at a peripheral position of the cavity 5 to seal the cavity 5 with respect to the periphery thereof. The membrane cutting device is in a preferable structural form after membrane cutting, namely, the first central pipe section and the second central pipe section are effectively separated through the bulge of the connecting main body, so that a separated cavity is formed between the first section filter element and the second section filter element, raw water can enter the cavity first and then enter the second raw water flow channel, the flow rate of the raw water is improved, the scale formation preventing effect is improved, the service life of the filter element is prolonged, and the position of the cavity can be effectively sealed through the first water sealing piece.

The seal part (fig. 3 a-3 b) comprises a first seal 61 and a second seal 62. The first water sealing piece 61 is mainly used for separating the concentrated water outlet of the first section filter element 21 and the raw water inlet of the second section filter element 22 from the raw water inlet of the first section filter element 21 so as to prevent the raw water of the first section filter element 21 from being mixed with other water, the installation position of the first water sealing piece 61 is arranged at the joint of the first section filter element 21 and the second section filter element 22, and the first water sealing piece 61 comprises a positioning column 611 which is inserted into a gap at the joint of the first section filter element 21 and the second section filter element 22; the rubberizing surface one 613 is mainly used for realizing the fastening connection with the first section filter element 21 and the second section filter element 22; the ribs 612 are used for forming a water flow passage with the inner wall of the filter flask body, and are contacted with the inner wall surface at the same time, so that the whole filter element is centered. The second water sealing piece 62 is mainly used for realizing separation between the concentrated water outlet of the second section filter element 22 and the raw water inlet water channel of the first section filter element 21, is arranged at the concentrated water outlet end of the second section filter element 22, and the first rib 621 is positioned on the inner wall and is used for forming a flow channel with the second section filter element 22 close to the concentrated water outlet end face and timely discharging the concentrated water; the second rib 622 and the inner wall of the filter flask form a water flow passage, and the filter element is centered; the groove II 623 is used for installing a sealing ring and extruding the sealing ring with the first surface of the filter flask body 7 to realize sealing; a water outlet for leading out the concentrated water of the second section filter element 22; and the second rubberized surface 624 is used for being bonded with the second section filter element 22 through adhesive tape to realize sealing and fastening connection.

Fig. 6 shows a glue line arrangement mode when the filter element is rolled, the first section filter element 21 and the second section filter element 22 have a common inter-section separation glue line 31, the glue line arrangement position is positioned in the middle of the adjacent holes of the first pure water diversion hole 11 and the second pure water diversion hole 12 of the central tube, and the preliminary filter element can be formed by rolling after the membrane and the net are placed as required. After the glue is solidified, the filter element needs to be trimmed, so as to remove the redundant glue blocking the solidification of the water inlet and outlet paths (during film trimming, a part of glue lines are removed, a channel is reserved, and the left glue lines are used for playing a sealing role).

FIG. 7 shows the cartridge trimmed and the connection of the two cartridge segments after trimming. The trimming comprises two steps, namely trimming two ends of the filter element by using a knife 1 and a knife 2, and removing redundant glue on the water inlet end face of the first section of filter element 21 and the water outlet end face of the second section of filter element 22; cutting off the filter element according to the position of the inter-section separation glue line to divide the filter element into two parts to form a physical two-section filter element; after the filter element is trimmed, the first section filter element 21 and the second section filter element 22 are connected through the double-head connecting piece, the sealing piece of the double-head connecting piece is respectively inserted into the inner wall of the central pipe at the joint of the first section filter element 21 and the second section filter element 22 to realize waterway sealing, meanwhile, the convex characteristic of the double-head sealing connecting piece enables the middle of the first section filter element 21 and the second section filter element 22 to form a section of cavity 5, the cavity is a necessary characteristic, the function of the cavity can enable the membrane surface to form a partition state, limit the membrane surface scaling area, and meanwhile, concentrated water outlet water of the first section filter element 21 is collected and gathered and then is gathered together to be led into the water inlet end surface of the second section filter element 22, so that the membrane surface flow rate of the membrane surface of the second section filter element 22 can be increased (the membrane surface flow rate of the membrane surface of the water inlet of the second section filter element 22 can be changed due to the existence of gaps, the concentrated water of the first section filter element is collected firstly, and meanwhile, the water inlet end of the second section filter element has a certain width of glue line, so that the collected water is not evenly discharged along the traditional drainage path, and the flow rate of the water inlet end of the second section filter element is increased, and the flow rate of the water is increased compared with the water inlet flow rate of the second section filter element; on the other hand, the flow area of the cavity is reduced in the process of entering the second raw water flow channel, so that the flow speed can be increased, and scaling is effectively prevented), the service life of the filter element (membrane surface flow speed and membrane surface scaling limit are prolonged under the combined action, the scouring force on the membrane surface is enhanced due to the increase of the membrane surface flow speed, the scaling rate can be effectively delayed, and the service life of the filter element can be prolonged), the principle of the membrane surface scaling limit is that compared with the condition that the first section filter element 21 and the second section filter element 22 are not connected by the cavity, the tiny crystal grains in the concentrated water after the cavity is provided with the cavity area without an adhesion carrier, and meanwhile, the water flow direction is that the first section filter element 21 flows to the second section filter element 22, so that the scaling area is limited to the film surface of the second section filter element 22 under the condition that the water flow driving force and the second section filter element 22 are used as the adhesion carrier, and the tiny crystal grains are gathered to form large granular substances which are scales. For the filter element, gaps exist between two sections of filter elements, so that tiny grains do not have attachments at the parts; meanwhile, the scaling is mainly limited to the second section filter element under the pushing of the water flow direction and the large flow speed of the water inlet membrane surface of the second section filter element. During the service life of the filter element, the scale of the optimized stage-type filter element is mainly in the second stage filter element.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. An integrated roll-type membrane filter core with stage filtration function, its characterized in that: comprising the following steps:

the membrane (2) is an integral membrane and is rolled on the periphery of the central tube (1), the membrane (2) comprises an axial first end (23) and an axial second end (24) along the axis direction of the central tube (1), the membrane (3) comprises an intersegmental separation glue line (31) arranged between the axial first end (23) and the axial second end (24) before rolling so as to separate the membrane (2) into a first section filter element (21) and a second section filter element (22) in a stage mode, after the membrane (2) is rolled on the central tube (1), the first section filter element (21) and the second section filter element (22) are separated along the intersegmental separation glue line (31) by trimming, and the central tube (1) is further cut towards the radial inner side and the two sections filter element (22) are connected through the connecting piece (4) after cutting.

2. The integrated roll-up membrane cartridge with stage filtration function of claim 1, wherein:

the membrane (2) is folded to form two opposite front surfaces and two opposite back surfaces, a raw water flow passage is formed between the two opposite front surfaces, and a pure water flow passage is formed between the adjacent back surfaces; the intersegmental separation glue line (31) is arranged on the back surface of the folded membrane (2) so as to seal and separate pure water flow passages of the two sections of filter elements; the first section filter element (21) comprises a first raw water flow passage formed between two opposite front surfaces thereof and a first pure water flow passage positioned at the back surface of the first section filter element (21), and the second section filter element (22) comprises a second raw water flow passage formed between two opposite front surfaces thereof and a second pure water flow passage positioned at the back surface of the second section filter element (22); the outlet of the first raw water flow passage is communicated with the inlet of the second raw water flow passage.

3. The integrated roll-up membrane cartridge with stage filtration function of claim 2, wherein:

the membrane (2) is folded to form a folded edge (25), a first long side, a second long side and an opening end (26), the folded edge (25) is rolled towards the central tube (1), the first long side is positioned at the axial first end (23), the second long side is positioned at the axial second end (24), one end of the inter-section separation glue line (31) extends to be connected with the folded edge (25), and in the membrane repairing process, the inter-section separation glue line (31) is cut from the middle to form an inter-section separation glue line I positioned on the first section filter element (21) and an inter-section separation glue line II positioned on the second section filter element (22);

The glue line (3) further comprises a filter element-glue line arranged on the back surface of the first section filter element (21), the filter element-glue line and the inter-section separation glue line enclose the first pure water flow channel, and an opening of the first pure water flow channel faces the folded edge (25);

the glue line (3) further comprises a second filter element glue line arranged on the back surface of the second section filter element (22), the second filter element glue line and the second inter-section separation glue line form a second pure water flow passage in a surrounding mode, and an opening of the second pure water flow passage faces the folded edge (25).

4. An integrated roll-up membrane cartridge with stage filtration function as claimed in claim 3, wherein:

the first filter element glue line comprises a first filter element glue line (32) and a second filter element glue line (33), the first filter element glue line (32) is arranged at a position close to the first long side relative to the second long side, the second filter element glue line (33) is arranged at a position close to the opening end (26) relative to the folded edge (25), the first filter element glue line (32) extends from the folded edge (25) to be connected with the second filter element glue line (33), one end of the first filter element glue line (33) is connected with the first filter element glue line (32), and the other end of the first filter element glue line is connected with the first inter-section separation glue line;

The second filter element glue line comprises a first filter element glue line (34) and a second filter element glue line (35), the first filter element glue line (34) is arranged relative to the first long edge and close to the second long edge, the second filter element glue line (35) is arranged relative to the folded edge (25) and close to the opening end (26), the first filter element glue line (34) extends from the folded edge (25) to the second filter element glue line (35) to be connected, one end of the second filter element glue line (35) is connected with the first filter element glue line (34), and the other end of the second filter element glue line is connected with the second inter-section separation glue line.

5. The integrated roll-up membrane cartridge with stage filtration function of claim 4, wherein:

in the plane of the expansion of the membrane (2), the first filter element glue line (32), the inter-section separation glue line (31) and the first filter element glue line (34) are arranged in parallel and are perpendicular to the central axis of the central tube (1), and the second filter element glue line (33) and the second filter element glue line (35) are positioned on the same straight line and are parallel to the central axis of the central tube (1).

6. The integrated roll-up membrane cartridge with stage filtration function of claim 4, wherein:

In the membrane repairing process, the first filter element glue line (32) and the second filter element glue line (33) are sequentially or simultaneously subjected to membrane repairing cutting, and the first filter element glue line (34) and the second filter element glue line (35) are sequentially or simultaneously subjected to membrane repairing cutting; and/or the number of the groups of groups,

after the membrane (2) is rolled to the central tube (1), and before the membrane (2) is repaired, a glue curing step is further provided, and after the glue line is arranged and the preset time is continued, the rolled membrane (2) is repaired.

7. The integrated roll-up membrane cartridge with stage filtration function of claim 2, wherein:

the central tube (1) is provided with a pure water diversion hole I (11) and a pure water diversion hole II (12), the pure water diversion hole I (11) and the pure water diversion hole II (12) penetrate from the outer wall to the inner wall of the central tube (1), the pure water diversion hole I (11) is opposite to the first section of filter element (21), the second pure water guide hole (12) is opposite to the second section of filter element (22), the first pure water flow channel is communicated with the first pure water guide hole (11), and the second pure water flow channel is communicated with the second pure water guide hole (12).

8. The integrated roll-up membrane cartridge with stage filtration function of claim 7, wherein:

And the spacing distance between the nearest pure water diversion hole I (11) and the nearest pure water diversion hole II (12) along the axial direction of the central tube (1) is more than 2 times of the width of the intersegmental separation glue line (31).

9. The integrated roll-up membrane cartridge with stage filtration function of claim 1, wherein:

the central tube (1) is cut to form a first central tube section (13) and a second central tube section (14) which are disconnected when being trimmed, and the connecting piece (4) is arranged between the first central tube section (13) and the second central tube section (14) and connects the first central tube section (13) and the second central tube section (14) into a whole;

the first central pipe section (13) and the second central pipe section (14) are arranged at intervals, the connecting piece (4) comprises a connecting main body (41) and a protrusion (42), the protrusion (42) is arranged on the peripheral wall of the connecting main body (41) and protrudes outwards, and the protrusion (42) is clamped at an interval position between the first central pipe section (13) and the second central pipe section (14).

10. The integrated roll-up membrane cartridge with stage filtration function of claim 9, wherein:

the connecting body (41) is of a cylindrical structure, the connecting body (41) is divided into a first connecting body and a second connecting body by the bulge (42), the first connecting body is positioned on one axial side of the bulge (42), the second connecting body is positioned on the other axial side of the bulge (42), the first connecting body is penetrated into the first central pipe section (13), and the second connecting body is penetrated into the second central pipe section (14);

And/or the bulge (42) is an annular structure or a plurality of structures arranged at intervals on the peripheral wall of the connecting main body (41), and the outer diameter of the bulge (42) is flush with the outer diameter of the central tube (1).

11. The integrated roll-up membrane cartridge with stage filtration function of claim 9, wherein:

after the central tube (1) is cut off and the connecting piece (4) is arranged between the first central tube section (13) and the second central tube section (14), the first section filter element (21) and the second section filter element (22) are arranged at intervals to form a cavity (5), and a first water sealing piece (61) is arranged at the peripheral position of the cavity (5) so as to seal the cavity (5) relative to the periphery of the cavity.

12. A water purifier, characterized in that: an integrated roll-up membrane cartridge comprising the stage filtration function of any one of claims 1-11.