CN214031948U - Membrane filtration assembly, composite filter element and water purifier system - Google Patents

Abstract

The utility model relates to a membrane filtration subassembly, composite filter and purifier system, membrane filtration subassembly include the membrane filter layer and roll up the membrane center tube, it includes first end cap, rearmounted filter core and central pipeline section to roll up the membrane center tube, rearmounted filter core is the tubular structure, rearmounted filter core with central pipeline section intercommunication, first end cap is sealed keep away from on the rearmounted filter core the one end of central pipeline section, the membrane filter layer cover is in roll up on the membrane center tube, quilt on the outer peripheral face of central pipeline section the position that the membrane filter layer covered is equipped with the guiding gutter, liquid in the guiding gutter can flow in rearmounted filter core. When the integrated level is higher, promote the filter effect, reduce and trade the core cost.

Description

Membrane filtration assembly, composite filter element and water purifier system

Technical Field

The utility model relates to a water purification unit technical field especially relates to membrane filtration subassembly, composite filter and purifier system.

Background

Along with the improvement of living standard, people have higher and higher requirements on the quality of drinking water, and the water purifier is water purifying equipment capable of filtering tap water so as to improve the water quality. The volume, the filtering effect and the cost of the water purifier are important factors for measuring the market competitiveness of the water purifier. In order to achieve the miniaturization of the volume, researchers are dedicated to the integration of multiple stages of filter elements, and the influence on the filtering effect needs to be considered while the integration degree is improved. When the integration level is higher in the limited space in the filter flask, if the matching between the filter cores at different levels is unreasonable, the filtering effect is influenced, and the core replacing cost is also improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses when being higher to the integrated level, the filter effect is poor and trade the problem that the core is with high costs, has provided a membrane filtering component, combined filter core and purifier system, can reach the promotion filter effect in that the integrated level is higher, reduces the technological effect who trades the core cost.

The utility model provides a membrane filtration assembly, includes the membrane filter layer and rolls up the membrane center tube, it includes first end cap, rearmounted filter core and center tube section to roll up the membrane center tube, rearmounted filter core is the tubular structure, rearmounted filter core with center tube section intercommunication, first end cap seal is in keep away from on the rearmounted filter core the one end of center tube section, membrane filter layer cover is in roll up on the membrane center tube, quilt on the outer peripheral face of center tube section the position that the membrane filter layer covered is equipped with the guiding gutter, liquid in the guiding gutter can flow in rearmounted filter core.

The above-mentioned scheme provides a membrane filtration subassembly, sets up the form that is used for supplying the roll membrane center tube that the membrane filter layer was convoluteed to the part contains the post-filter core to integrate membrane filter layer and post-filter core together. And only part of the rolling membrane central tube is arranged as the rear filter element, and the other part of the rolling membrane central tube is the central tube section, rather than arranging the rolling membrane central tube as the rear filter element with filtering capacity, so that the cost of replacing the membrane filtering component is effectively controlled. The pure water obtained by filtering through the membrane filtering layer can be further filtered through the post-positioned filter element. And in order to improve the filtering effect, the flow guide groove is further arranged on the central pipe section, so that pure water generated by the part, corresponding to the central pipe section, of the membrane filtering layer can flow to the rear filter element along the flow guide groove to be filtered, and the problem of poor filtering effect caused by large pressure build-up is avoided. Under the blocking effect of the first sealing end cover, purified water obtained by filtering through the rear filter element can be discharged from one end, far away from the rear filter element, of the central pipe section along the central pipe section, the whole structure is simple, and the core replacement cost is further reduced.

In one embodiment, the flow guide grooves are arranged along the axial direction of the membrane filtration layer, the flow guide grooves are multiple, and the flow guide grooves are distributed at intervals in the circumferential direction of the outer circumferential surface of the central pipe section.

In one embodiment, the part of the outer circumferential surface of the central pipe section covered by the membrane filtering layer comprises a water sealing area, the membrane filtering layer is connected with the central pipe section at the water sealing area, and the diversion trench is positioned on one side of the water sealing area close to the post-positioned filter element.

In one embodiment, the axial length of the central pipe section is greater than half of the axial length of the membrane filtration layer, and the water sealing area is located at one end of the central pipe section away from the rear filter element.

In one embodiment, the membrane rolling central tube further comprises a second end cap, the second end cap is disposed at one end of the rear filter element close to the central tube section, the central tube section is connected with the second end cap, a flow guiding through hole is disposed on the second end cap, the flow guiding through hole communicates the rear filter element intermediate channel with the central tube section, and the flow guiding groove extends to the outer peripheral surface of the second end cap, so that liquid in the flow guiding groove can flow into the rear filter element.

In one embodiment, the second sealing end cover comprises a sealing barrel and a sealing plate arranged in the sealing barrel, the sealing plate divides the sealing barrel into a first part and a second part in the axial direction, the rear filter element is tightly abutted to the sealing plate, the flow guide through hole is located in the sealing plate, the first part of the sealing barrel is sleeved outside the rear filter element, the flow guide groove extends to the outer peripheral surface of the first part, the second part of the sealing barrel is inserted outside the central pipe section, and a sealing element is arranged between the second part of the sealing barrel and the central pipe section.

In one embodiment, an ultrafiltration membrane cartridge is disposed in the central tube section.

The utility model provides a composite filter element, includes filter flask, leading filter element group spare and above-mentioned arbitrary membrane filtering component, be equipped with in the filter flask and cut apart the end cover, will space in the filter flask is cut apart into first filter chamber and second filter chamber in the axial, leading filter element group spare is located in the first filter chamber, membrane filtering component is located in the second filter chamber, be equipped with leading filtration mouth of a river, pressurization water inlet and the water purification mouth of a river on the filter flask, leading filtration mouth of a river with leading filter element group spare produce the mouth of a river intercommunication, the pressurization water inlet with the former water inlet intercommunication of membrane filtering layer, central pipeline section with water purification mouth intercommunication.

Above-mentioned scheme provides a composite filter element, through adopting the membrane filtration subassembly in any above-mentioned embodiment to when the integrated level is higher, effectively promote the filter effect, be based on moreover the membrane filtration subassembly structure is succinct, thereby effectively reduces and trades the core cost.

In one embodiment, the filter flask is further provided with a raw water port and a concentrated water port, the segmentation end cover is in sealing contact with the inner wall of the filter flask, the segmentation end cover seals the end face, close to the membrane filtering component, of the front filter element assembly, the segmentation end cover is sleeved on one end, close to the first sealing end cover, of the membrane filtering layer, a raw water cavity is formed between the outer peripheral surface of the front filter element assembly and the filter flask at intervals, the raw water cavity is communicated with the raw water port, a pressurized water cavity is formed between the outer peripheral surface of the membrane filtering component and the filter flask at intervals, a raw water inlet of the membrane filtering layer is located on the outer peripheral surface of the membrane filtering layer, the pressurized water cavity is communicated with the pressurized water inlet, and a concentrated water outlet of the membrane filtering layer is communicated with the concentrated water port.

In one embodiment, the raw water port and the pre-filter water port are positioned on the end face of the filter flask close to the pre-filter element assembly, and the pressurizing water inlet port, the thick water port and the pure water port are positioned on the end face of the filter flask close to the membrane filter assembly.

A water purifier system comprises the composite filter element, a pressurizing passage is arranged between the preposed filtering water inlet and the pressurizing water inlet, and a water pump is arranged on the pressurizing passage.

According to the scheme, the water purifier system is provided, the composite filter element in any one of the embodiments is adopted, the integration level is high, the water yield is effectively improved, and the composite filter element structure is simple, so that the core replacement cost is effectively reduced. In the water making process, after the pre-filtering water formed after the pre-filtering core assembly is filtered is discharged from the pre-filtering water gap, the pre-filtering water enters the second filtering cavity after being further pressurized by the water pump on the pressurizing passage and enters the membrane filtering layer from a raw water inlet of the membrane filtering layer. The water production capacity of the membrane filtration layer can be further improved by pressurization.

In one embodiment, a first switch valve is arranged on the pressurizing passage, the first switch valve is located at the upstream of the water pump, a water using passage is arranged at a water purifying port of the filter bottle, the water using passage is communicated with a faucet, a one-way valve and a pressure switch are arranged on the water using passage, the one-way valve is located at the upstream of the pressure switch, a concentrated water passage is arranged at a concentrated water port of the filter bottle, a second switch valve is arranged on the concentrated water passage, and the pressure switch is electrically connected with the first switch valve, the second switch valve and the water pump.

In one embodiment, the faucet further includes an additional passage communicating between the pressurized passage and the faucet, a location on the pressurized passage for communication with the additional passage being upstream of the first on-off valve.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a membrane filtration module according to the present embodiment;

FIG. 2 is a cross-sectional view of the membrane filtration module of FIG. 1;

FIG. 3 is a schematic diagram of the construction of the rolled membrane center tube of the membrane filtration module of FIG. 1;

FIG. 4 is a cross-sectional view of the rolled membrane center tube of FIG. 3;

FIG. 5 is a schematic structural diagram of the composite filter element according to the present embodiment;

FIG. 6 is a cross-sectional view taken along line A-A of the composite filter element of FIG. 5;

fig. 7 is an exploded view of the composite filter element of fig. 5;

FIG. 8 is a schematic view of a pre-filter assembly of the composite filter element of FIG. 5;

FIG. 9 is a cross-sectional view taken along B-B of the front filter cartridge assembly of FIG. 8;

fig. 10 is a system diagram of a water purifier system according to the present embodiment;

fig. 11 is a system diagram of a water purifier system according to another embodiment.

Description of reference numerals:

10. a membrane filtration module; 11. a membrane filtration layer; 12. rolling the membrane central tube; 121. a first end seal cap; 122. a post-positioned filter element; 123. a central tube section; 1231. a water sealing area; 124. a second end seal cap; 1241. a flow guide through hole; 1242. a sealing cylinder; 1243. sealing the disc; 13. a diversion trench; 14. an ultrafiltration membrane cartridge; 20. a composite filter element; 21. a filter flask; 211. a front filtering water gap; 212. a pressurized water inlet; 213. a water purifying port; 214. a dense water port; 215. a raw water port; 22. a pre-filter element assembly; 221. a front filter element end cover; 2211. a water passing through hole; 2212. an auxiliary cylinder; 23. end cover cutting; 24. a raw water cavity; 25. a pressurized water chamber; 26. a transfer sleeve; 30. a water purifier system; 31. a pressurizing passage; 311. a water pump; 312. a first on-off valve; 32. a water usage passage; 321. a one-way valve; 322. a pressure switch; 33. a concentrated water passage; 331. a second on-off valve; 34. an additional via; 35. a faucet.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1 and 2, in one embodiment, a membrane filtration assembly 10 is provided comprising a membrane filtration layer 11 and a rolled membrane center tube 12. As shown in fig. 2 to 4, the membrane rolling central tube 12 includes a first end cap 121, a rear filter element 122, and a central tube segment 123. The rear filter element 122 is a tubular structure, the rear filter element 122 is communicated with the central pipe section 123, and the first sealing end cover 121 is sealed at one end of the rear filter element 122, which is far away from the central pipe section 123. The water filtered by the post-filter element 122 can be discharged from the end of the central tube 12 away from the first end cap 121.

Further, as shown in fig. 2 to 4, the membrane filtration layer 11 is sleeved on the membrane winding central tube 12, a diversion trench 13 is arranged at a position on the outer circumferential surface of the central tube segment 123 covered by the membrane filtration layer 11, and the liquid in the diversion trench 13 can flow into the post-filter element 122.

The above-described aspect provides a membrane filtration module 10 in which the rolled membrane center tube 12 for winding the membrane filtration layer 11 is provided in a form partially containing the post-filter element 122, thereby integrating the membrane filtration layer 11 and the post-filter element 122. Moreover, the central rolled membrane tube 12 is only partially arranged as the post-filter element 122 and partially arranged as the central tube section 123, and the central rolled membrane tube 12 is not entirely arranged as the post-filter element 122 with filtering capability, so that the cost of replacing the membrane filter assembly 10 is effectively controlled. The pure water obtained by filtration through the membrane filtration layer 11 is further filtered by the post-filter 122. In order to improve the filtering effect, the flow guide groove 13 is further arranged on the central pipe section 123, so that pure water generated by the part, corresponding to the central pipe section 123, of the membrane filtering layer 11 can flow to the rear filter element 122 along the flow guide groove 13 for filtering, and the problem of poor filtering effect caused by large pressure build-up is avoided. Under the blocking action of the first sealing end cover 121, purified water obtained by filtering through the rear filter element 122 can be discharged from one end, far away from the rear filter element 122, of the central pipe section 123 along the central pipe section 123, so that the whole structure is simple, and the core replacement cost is further reduced.

Specifically, in one embodiment, when the central pipe segment 123 is in direct contact with the post-filter element 122, the diversion trench 13 may penetrate through an end surface of the central pipe segment 123 in contact with the post-filter element 122, so that pure water generated by a portion of the membrane filtration layer 11 corresponding to the central pipe segment 123 can flow along the diversion trench 13 to the post-filter element 122 for filtration.

Alternatively, as shown in fig. 2-4, in one embodiment, the rolled membrane central tube 12 further comprises a second end cap 124, and the second end cap 124 is disposed on the rear filter element 122 at an end adjacent to the central tube segment 123. The central pipe section 123 is connected with the second end cap 124, a flow guiding through hole 1241 is arranged on the second end cap 124, and the flow guiding through hole 1241 communicates the middle channel of the rear filter element 122 with the central pipe section 123. At this time, the guide channel 13 extends to the outer peripheral surface of the second end cap 124, so that the liquid in the guide channel 13 can flow into the rear filter element 122.

So that the pure water generated from the portion of the membrane filtration layer 11 corresponding to the central pipe section 123 passes through the central pipe section 123 and the second end cap 124 along the guide groove 13 in sequence to reach the post-filter element 122.

Further, as shown in fig. 4, in one embodiment, the second seal end cap 124 includes a seal barrel 1242 and a seal disk 1243 disposed in the seal barrel 1242. The seal plate 1243 divides the seal barrel 1242 into a first part and a second part in the axial direction.

Further, the rear filter element 122 abuts against the sealing disc 1243, the flow guide through hole 1241 is located on the sealing disc 1243, and the first portion of the sealing cylinder 1242 is sleeved outside the rear filter element 122. The sealing disk 1243 and the first part of the sealing cylinder 1242 seal the end face of the rear filter element 122, so that water passing through the rear filter element 122 is mainly filtered in the radial direction of the rear filter element 122 from the outside to the inside.

As shown in fig. 3, the guide grooves 13 extend to the outer circumferential surface of the first portion. As shown in fig. 4, a second portion of the sealing cylinder 1242 is inserted outside the central pipe segment 123, and a sealing member is disposed between the second portion of the sealing cylinder 1242 and the central pipe segment 123.

The water filtered by the post-filter element 122 flows into the central pipe section 123 from a channel in the middle of the post-filter element 122, and then is discharged from one end of the central pipe section 123 far away from the first sealing end cap 121.

Specifically, the post-filter element 122 may be a carbon rod. The micropores of the carbon rod are utilized to carry out water passing, and the membrane filter layer 11 is supported while the purification and filtration are finished.

Further specifically, the membrane filtration layer 11 may be a reverse osmosis membrane filter element or a nanofiltration membrane filter element.

Further, in one embodiment, as shown in fig. 3 and 4, the guide grooves 13 are provided along the axial direction of the membrane filtration layer 11. The number of the guide grooves 13 is plural, and the plurality of guide grooves 13 are distributed at intervals in the circumferential direction of the outer circumferential surface of the central pipe section 123.

Pure water obtained by filtration through the membrane filtration layer 11 enters each of the guide grooves 13, flows in the axial direction of the membrane filtration layer 11, and enters the post-filter element 122.

Further, in one embodiment, as shown in fig. 3, the portion of the outer circumferential surface of the central tube segment 123 covered by the membrane filtration layer 11 includes a water-seal zone 1231. The membrane filtration layer 11 is connected to the central pipe segment 123 at the water sealing region 1231, and the guide groove 13 is located at one side of the water sealing region 1231, which is close to the post-filter element 122. In other words, the area of the central pipe section 123 where the guiding groove 13 is provided is located on the side of the water sealing area 1231 close to the rear filter element 122, so as to ensure that the water in the guiding groove 13 only flows to the rear filter element 122, and does not flow in the opposite direction.

Specifically, as shown in fig. 3, in one embodiment, the water seal zone 1231 is located at an end of the central tube segment 123 distal to the post-filter cartridge 122.

Further, as shown in fig. 2, in one embodiment, the axial length of the central tube segment 123 is greater than half of the axial length of the membrane filtration layer 11. So that the rolled membrane central tube 12 mainly comprising the central tube segment 123 and the post-filter element 122 has sufficient support strength to provide support for the membrane filtration layer 11. Meanwhile, the water passing capacity of the rear filter element 122 can also be matched with the water producing capacity of the membrane filter layer 11, so that pure water generated by filtering of the membrane filter layer 11 can be timely filtered at the rear filter element 122. The condition that the water passing capacity of the rear filter element 122 is insufficient and cannot be matched with the upper membrane filter layer 11 is avoided, the condition that the water passing capacity of the rear filter element 122 is redundant is also avoided, and the cost of the membrane filter assembly 10 is effectively controlled.

Further, in one embodiment, as shown in FIG. 6, the central tube segment 123 has an ultrafiltration membrane cartridge 14 disposed therein. The water filtered by the post-filter element 122 is further filtered, and the water purification effect is further improved.

Further, as shown in fig. 5 and 6, in one embodiment, a composite filter element 20 is provided, including the membrane filtration assembly 10 described in any of the above embodiments.

According to the composite filter element 20 provided by the scheme, the membrane filtering component 10 in any embodiment is adopted, so that the water yield is effectively improved while the integration level is high, and the structure of the membrane filtering component 10 is simple, so that the core replacement cost is effectively reduced.

More specifically, as shown in fig. 5-7, the composite filter element 20 further includes a filter flask 21 and a pre-filter element assembly 22. A partition end cover 23 is arranged in the filter flask 21, and the space in the filter flask 21 is axially partitioned into a first filter cavity and a second filter cavity. The pre-filter element assembly 22 is located in the first filter cavity and the membrane filter assembly 10 is located in the second filter cavity. The filter flask 21 is provided with a front filter water gap 211, and the front filter water gap 211 is communicated with a water production port of the front filter core assembly 22. The pre-filtered water obtained after the pre-filter core assembly 22 is filtered is discharged out of the composite filter element 20 through the pre-filter water gap 211.

Specifically, as shown in fig. 6, in one embodiment, the pre-filter nozzle 211 may be located directly on the end face of the filter flask 21 adjacent to the pre-filter element assembly 22.

Further, in one embodiment, as shown in fig. 6, a pressurized water inlet 212 is provided on the filter flask 21, and the pressurized water inlet 212 is communicated with the raw water inlet of the membrane filtration layer 11. The filter flask 21 is provided with a water purifying port 213, and the central pipe section 123 is communicated with the water purifying port 213.

The prefilter water discharged from the prefilter water inlet 211 may be pressurized and then enter the second filter chamber from the pressurized water inlet 212, and enter the membrane filter layer 11 from the raw water inlet of the membrane filter layer 11 for filtration.

Specifically, in one embodiment, as shown in fig. 6, the pressurized water inlet 212 may be located on an end face of the filter flask 21 proximate to the membrane filtration module 10. The water purifying port 213 may be located on an end surface of the filter flask 21 near the membrane filtration module 10.

As shown in fig. 6, in one embodiment, an end of the central pipe segment 123 away from the rear filter element 122 is opened as an opening of the central film rolling pipe 12, and the opening of the central film rolling pipe 12 faces the water purifying port 213 and is communicated with the water purifying port 213.

Further, in one embodiment, as shown in fig. 6, a raw water port 215 is further provided on the filter flask 21. Cut apart end cover 23 with the inner wall sealing contact of filter flask 21, it is sealed to cut apart end cover 23 be close to on the leading filter element subassembly 22 the terminal surface of membrane filtration subassembly 10, it overlaps to cut apart end cover 23 be close to on the membrane filtration layer 11 the one end of first end cover 121. The first filter cavity and the second filter cavity are divided by the dividing end cover 23, and the two filter cavities are not communicated.

Specifically, as shown in fig. 6, the first sealing end cap 121 abuts against the dividing end cap 23, an adapter sleeve 26 is disposed at one end of the membrane filtration assembly 10 away from the dividing end cap 23, the adapter sleeve 26 is sleeved outside the membrane filtration layer 11, and the adapter sleeve 26 abuts against an end wall of the filter flask 21, so that the relative position of the membrane filtration assembly 10 in the filter flask 21 is more stable.

Further, the filter bottle 21 is further provided with a concentrate inlet 214, and the concentrate inlet 214 may be located on the filter bottle 21 near an end face of the membrane filtration module 10.

Further, as shown in fig. 6, in one embodiment, a raw water cavity 24 is formed between the outer peripheral surface of the front filter element assembly 22 and the filter bottle 21, and the raw water cavity 24 is communicated with the raw water port 215. The outer peripheral surface of the membrane filtration assembly 10 and the filter flask 21 form a pressurized water cavity 25 at intervals, the raw water inlet of the membrane filtration layer 11 is positioned on the outer peripheral surface of the membrane filtration layer 11, and the pressurized water cavity 25 is communicated with the pressurized water inlet 212. The concentrate outlet of the membrane filtration layer 11 is communicated with the concentrate inlet 214.

When the raw water port 215 is located on the end surface of the filter flask 21 close to the pre-filter element assembly 22, as shown in fig. 6 to 9, in one embodiment, the end wall of the filter flask 21 close to the pre-filter element assembly 22 is a first end wall, and the first end wall is provided with an opening. Leading filter core subassembly 22 is gone up and is close to the terminal surface of first end wall is equipped with leading filter core end cover 221, leading filter core end cover 221 on with the position that the product water gap of leading filter core subassembly 22 corresponds is equipped with water through-hole 2211. The front filter element end cover 221 is spaced apart from the first end wall. An auxiliary cylinder 2212 communicated with the water through hole 2211 is arranged on the surface of the front filter element end cover 221 facing the first end wall, the auxiliary cylinder 2212 is inserted into the opening on the first end wall, and the auxiliary cylinder 2212 and the side wall of the opening on the first end wall are arranged at intervals to form the raw water port 215. The auxiliary cylinder 2212 encloses the front filtering nozzle 211. The gap between the pre-filter element end cover 221 and the first end wall communicates the raw water port 215 with the raw water chamber 24.

Specifically, in one embodiment, as shown in fig. 9, the pre-filter assembly 22 includes a paper folded filter element and a carbon rod, the paper folded filter element is sleeved outside the carbon rod, and the outlet of the channel in the middle of the carbon rod is the water producing port of the pre-filter assembly 22.

Further, as shown in fig. 10, in an embodiment, there is provided a water purifier system 30, including the composite filter element 20 described in any one of the above, a pressurizing passage 31 is provided between the pre-filtering water inlet 211 and the pressurizing water inlet 212, and a water pump 311 is provided on the pressurizing passage 31.

According to the water purifier system 30 provided by the scheme, the composite filter element 20 in any one of the embodiments is adopted, the water yield is effectively improved while the integration level is high, and the structure is simple based on the composite filter element 20, so that the core replacement cost is effectively reduced. In the process of water production, after the prefiltered water formed after filtration by the prefilter core assembly 22 is discharged from the prefilter water gap 211, the prefilter water is further pressurized by the water pump 311 on the pressurizing passage 31 and then enters the second filter chamber, and then enters the membrane filter layer 11 from the raw water inlet of the membrane filter layer 11. The water producing capacity of the membrane filtration layer 11 can be further improved by pressurization.

Further, in one embodiment, as shown in fig. 10, a first on-off valve 312 is provided on the pressurizing passage 31, and the first on-off valve 312 is located upstream of the water pump 311. The water purifying port 213 of the filter flask 21 is provided with a water using passage 32, the water using passage 32 is communicated with the water tap 35, the water using passage 32 is provided with a one-way valve 321 and a pressure switch 322, and the one-way valve 321 is positioned at the upstream of the pressure switch 322. The concentrate inlet 214 of the filter flask 21 is provided with a concentrate passage 33, and the concentrate passage 33 is provided with a second on-off valve 331. The pressure switch 322 is electrically connected to the first switch valve 312, the second switch valve 331 and the water pump 311.

When the faucet 35 is turned on, the pressure switch 322 detects a decrease in pressure in the water purifier system 30, and according to a signal detected by the pressure switch 322, the first on-off valve 312, the second on-off valve 331, and the water pump 311 are turned on, the water purifier system 30 enters a water production state, and the check valve 321 is turned on so that water in the water passage 32 can flow to the faucet 35. When the water tap 35 is closed, the pressure switch 322 detects that the pressure in the water purifier system 30 increases, and according to a signal detected by the pressure switch 322, the first switch valve 312, the second switch valve 331 and the water pump 311 are closed, and the check valve 321 is closed, so that the water in the water passage 32 is prevented from flowing back, and the pressure in the water purifier system 30 is kept stable.

Further, as shown in fig. 11, in one embodiment, the water purifier system 30 further includes an additional passage 34, the additional passage 34 is communicated between the pressurizing passage 31 and the water tap 35, and a position on the pressurizing passage 31 for communicating with the additional passage 34 is located upstream of the first on-off valve 312.

When the requirement of the user on the water quality is low and the pre-filtered water filtered by the pre-filter element assembly 22 can meet the requirement, the additional passage 34 can guide the pre-filtered water on the pressurizing passage 31 to the water faucet 35 for the user to use. As shown in fig. 11, when the user has different requirements on the water quality, the water faucet 35 is provided with at least two switches for controlling the outflow of water with different water qualities. When the corresponding switch is turned on, water in the corresponding passage flows out from the faucet 35.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

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

Claims (13)

1. The utility model provides a membrane filtration assembly, its characterized in that includes the membrane filter layer and rolls up the membrane center tube, it includes first end cap, rearmounted filter core and center tube section to roll up the membrane center tube, rearmounted filter core is the tubular structure, rearmounted filter core with center tube section intercommunication, first end cap is sealed keep away from on the rearmounted filter core the one end of center tube section, the membrane filter layer cover is in roll up on the membrane center tube, quilt on the outer peripheral face of center tube section the position that the membrane filter layer covered is equipped with the guiding gutter, liquid in the guiding gutter can flow in rearmounted filter core.

2. The membrane filtration assembly of claim 1, wherein the guide grooves are arranged along an axial direction of the membrane filtration layer, and the guide grooves are distributed at intervals in a circumferential direction of an outer circumferential surface of the central tube section.

3. The membrane filtration assembly of claim 2, wherein the portion of the outer peripheral surface of the central tube segment covered by the membrane filtration layer comprises a water seal zone, the membrane filtration layer being connected to the central tube segment at the water seal zone, the flow guide groove being located on a side of the water seal zone adjacent to the post-filter element.

4. A membrane filtration module according to claim 3, wherein the axial length of the central tube section is greater than half the axial length of the membrane filtration layer, and the water seal zone is located at an end of the central tube section remote from the post-filter element.

5. The membrane filtration assembly of any one of claims 1 to 4, wherein the coiled central membrane tube further comprises a second end cap, the second end cap is disposed at an end of the rear filter element adjacent to the central tube section, the central tube section is connected to the second end cap, the second end cap is provided with a flow guide through hole, the flow guide through hole communicates with the rear filter element intermediate channel and the central tube section, and the flow guide groove extends to an outer peripheral surface of the second end cap, so that liquid in the flow guide groove can flow into the rear filter element.

6. The membrane filter assembly according to claim 5, wherein the second end cap comprises a sealing cylinder and a sealing plate disposed in the sealing cylinder, the sealing plate axially divides the sealing cylinder into a first portion and a second portion, the rear filter element abuts against the sealing plate, the guide through hole is located on the sealing plate, the first portion of the sealing cylinder is sleeved outside the rear filter element, the guide groove extends to the outer peripheral surface of the first portion, the second portion of the sealing cylinder is inserted outside the central pipe section, and a sealing member is disposed between the second portion of the sealing cylinder and the central pipe section.

7. A membrane filtration module according to any one of claims 1 to 4, wherein an ultrafiltration membrane cartridge is provided in the central tube section.

8. A composite filter element, which comprises a filter flask, a front filter element assembly and the membrane filter assembly of any one of claims 1 to 7, wherein a partition end cover is arranged in the filter flask to axially partition the space in the filter flask into a first filter chamber and a second filter chamber, the front filter element assembly is positioned in the first filter chamber, the membrane filter assembly is positioned in the second filter chamber, the filter flask is provided with a front filter water inlet, a pressurizing water inlet and a water purifying port, the front filter water inlet is communicated with a water producing port of the front filter element assembly, the pressurizing water inlet is communicated with a raw water inlet of the membrane filter layer, and a central pipe section is communicated with the water purifying port.

9. The composite filter element according to claim 8, wherein the filter flask is further provided with a raw water port and a concentrated water port, the split end cap is in sealing contact with an inner wall of the filter flask, the split end cap seals an end surface of the front filter element assembly close to the membrane filter assembly, the split end cap is sleeved on one end of the membrane filter layer close to the first sealing end cap, a raw water cavity is formed between an outer peripheral surface of the front filter element assembly and the filter flask at an interval, the raw water cavity is communicated with the raw water port, a pressurized water cavity is formed between the outer peripheral surface of the membrane filter assembly and the filter flask at an interval, the raw water inlet of the membrane filter layer is located on the outer peripheral surface of the membrane filter layer, the pressurized water cavity is communicated with the pressurized water inlet, and the concentrated water outlet of the membrane filter layer is communicated with the concentrated water port.

10. The composite filter element of claim 9, wherein the raw water port and the pre-filter water port are located on an end surface of the filter flask adjacent to the pre-filter element assembly, and the pressurized water inlet, the concentrate port, and the clean water port are located on an end surface of the filter flask adjacent to the membrane filter assembly.

11. A water purification machine system, comprising a composite filter element according to any one of claims 8 to 10, wherein a pressurizing passage is arranged between the pre-filter water inlet and the pressurizing water inlet, and a water pump is arranged on the pressurizing passage.

12. The water purifier system as recited in claim 11, wherein a first switch valve is disposed on the pressurizing passage, the first switch valve is located upstream of the water pump, a water using passage is disposed at a water purifying port of the filter flask, the water using passage is communicated with the faucet, a check valve and a pressure switch are disposed on the water using passage, the check valve is located upstream of the pressure switch, a concentrated water passage is disposed at a concentrated water outlet of the filter flask, a second switch valve is disposed on the concentrated water passage, and the pressure switch is electrically connected to the first switch valve, the second switch valve and the water pump.

13. The water purifier system of claim 12, further comprising an additional passage communicating between the pressurization passage and the faucet, a location on the pressurization passage for communication with the additional passage being upstream of the first on-off valve.

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