CN111807538A - water purifier system - Google Patents

Abstract

The invention relates to a water purifier system, comprising a composite filter element. The composite filter element integrates a pre-filter element assembly, a membrane filter layer and a rear filter element assembly. The composite filter element is provided with a raw water inlet, a pre-filtered water outlet, a pressure There is a pressurized passage between the water inlet, the concentrated water outlet and the purified water outlet, and a pressurized passage is arranged between the pre-filtered water outlet and the pressurized water inlet. The pre-filtered water is obtained after filtration by the filter element assembly. The pre-filtered water is discharged into the pressurized passage from the pre-filtered water outlet, and the pre-filtered water entering from the pressurized water inlet is filtered through the membrane filter layer to obtain concentrated water and pure water. , the concentrated water is discharged from the concentrated water outlet, the pure water is filtered by the rear filter element to obtain purified water, and the purified water is discharged from the purified water outlet. The pressurized water pump can provide pressure for the filtration of the membrane filter layer, increase the water production efficiency of the membrane filter layer, and thus improve the overall water production flow of the water purifier system.

Description

water purifier system

technical field

The present invention relates to the technical field of water purification equipment, in particular to a water purifier system.

Background technique

The water purifier system mainly improves water quality through multi-stage filtration to meet the user's water requirements. With the continuous development of the technical field of water purification equipment and the continuous improvement of users' requirements for water quality, the number of filter elements used for purification and filtration in the water purifier system has gradually increased. With the increase in the number of filter elements, on the one hand, the number of core replacements increases, and on the other hand, the overall installation space required for the water purifier system increases. Based on this, the integrated composite filter element has been widely studied. By improving the integration of the filter element, the multi-stage filtration is integrated into a composite filter element, which not only meets the high water quality requirements, but also effectively controls the overall size and requires less installation space. However, while achieving high integration, how to ensure the water production efficiency is particularly important.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a water purifier system, which can effectively guarantee its water production efficiency while achieving high integration.

A water purifier system includes a composite filter element, in which a pre-filter element assembly, a membrane filter layer and a rear filter element assembly are integrated, and the composite filter element is provided with a raw water inlet, a pre-filtered water outlet, a A pressurized water inlet, a concentrated water outlet and a purified water outlet, a pressurized passageway is arranged between the pre-filtered water outlet and the pressurized water inlet, and a pressurized water pump is arranged on the pressurized passageway, from which The raw water entering the raw water inlet is filtered by the pre-filter element to obtain pre-filtered water, and the pre-filtered water is discharged into the pressurized passage from the pre-filtered water outlet, and discharged from the pressurized inlet. The pre-filtered water entering the water inlet is filtered by the membrane filter layer to obtain concentrated water and pure water, the concentrated water is discharged from the concentrated water outlet, and the pure water is filtered by the rear filter element assembly to obtain pure water. water, and the purified water is discharged from the purified water outlet.

The above solution provides a water purifier system, which ensures the high integration of the composite filter element by integrating the pre-filter element assembly, the membrane filter layer and the rear filter element assembly in the composite filter element. The pressurized water pump can provide pressure for the filtration of the membrane filter layer, thereby increasing the water production efficiency of the membrane filter layer, thereby increasing the overall water production flow of the water purifier system. When the multi-stage filter element is integrated, the pre-filter element is installed upstream of the membrane filter layer to filter, resulting in a large pressure loss, so that the membrane filter layer cannot be effectively filtered. Moreover, the pressurized water pump is located downstream of the pre-filter element assembly, and the pre-filter element assembly can filter out large particles of impurities and perform primary filtration on the raw water, thereby preventing large particles of impurities from contaminating the pressurized water pump, and further Extend the service life of the pressurized water pump.

In one embodiment, the water purification outlet is provided with a water purification passage, the water purification passage is used to communicate with a faucet, and a pressure sensing member is provided on the water purification passage, and the pressure sensing member is connected to the water faucet. The pressurized water pump is electrically connected.

In one embodiment, a first solenoid valve is provided on the pressurized passage, the first solenoid valve is located between the pressurized water pump and the pre-filtered water outlet, and the first solenoid valve is connected to the The pressure sensing element is electrically connected.

In one of the embodiments, an additional passage is further included, the additional passage communicates between the pressurizing passage and the faucet, and the position on the pressurizing passage for communicating with the additional passage is located on the first between a solenoid valve and the pre-filtered water outlet.

In one embodiment, the concentrated water outlet is provided with a concentrated water passage, and a concentrated water electromagnetic valve is arranged on the concentrated water passage, and the concentrated water electromagnetic valve is electrically connected with the pressure sensing member.

In one embodiment, the pressure sensing element is a pressure switch, the pressure switch is electrically connected to the pressurized water pump, and a one-way valve is provided on the water purification passage, so that the Water can only flow from the clean water outlet to the faucet, and the one-way valve is located between the pressure switch and the clean water outlet.

In one of the embodiments, the composite filter element includes a filter bottle, and the filter bottle is provided with a split end cap, and the space in the filter bottle is divided into a first filter cavity and a second filter cavity in the axial direction, The front filter element assembly is located in the first filter cavity, the membrane filter layer and the rear filter element assembly are both located in the second filter cavity, and the membrane filter layer is sleeved in the rear filter cavity. Outside the filter element assembly, the raw water inlet, the pre-filtered water outlet, the pressurized water inlet, the concentrated water outlet and the purified water outlet are all arranged on the filter bottle.

In one of the embodiments, a pre-filtered central pipe is also included, the end of the filter bottle used to form the second filter cavity is the first end, the raw water inlet, the pre-filtered water outlet, the pressurized inlet The water outlet, the concentrated water outlet and the purified water outlet are all arranged on the end face of the first end, one end of the front central pipe is communicated with the raw water inlet, and the front central pipe passes through the rear A filter element assembly and the split end cap are inserted into the first filter cavity.

In one of the embodiments, it further includes a guide center pipe, the guide center pipe is sleeved outside the front center pipe, and the guide center pipe is located between the front center pipe and the rear filter element assembly, The guiding center pipe and the front center pipe are arranged at intervals to form a pre-filtered water gap, the split end cover is provided with a water passage hole, and the front center pipe is inserted into the water passage hole. In the hole, the front central pipe and the side wall of the water passing jack are arranged at intervals, and the outer peripheral surface of the front filter element assembly and the side wall of the filter bottle are arranged at intervals to form a raw water gap, and the front The central pipe is communicated with the raw water gap, the guide central pipe is communicated with the water passage hole, and the end of the pre-filtered water gap away from the water passage hole is communicated with the pre-filter water outlet.

In one embodiment, the guiding central pipe and the rear filter element assembly are arranged at intervals to form a water purification gap, and the water purification gap communicates with the water purification outlet.

In one of the embodiments, an ultrafiltration membrane is provided in the water purification gap, so that the purified water is discharged from the water purification outlet after being filtered by the ultrafiltration membrane.

In one embodiment, one end of the pre-filter element is pressed against the split end cover, the other end of the pre-filter element is provided with a front end cover, and the front end cover is provided with a through-hole the front water holes on the two end faces of the front end cap, the front center pipe is communicated with the front water holes, the end of the filter bottle close to the front filter element assembly is the second end, A gap is provided between the front end cover and the end wall of the second end, so that the front water passage hole communicates with the raw water gap.

In one embodiment, the membrane filter layer is spaced from the filter bottle and/or the split end cap to form a pressurized water gap, and the pressurized water gap communicates with the membrane filter layer. Between the raw water inlet and the pressurized water inlet, the concentrated water outlet communicates with the concentrated water outlet of the membrane filter layer.

In one embodiment, the rear filter element assembly includes a rear filter element and end caps disposed at both ends of the rear filter element, the membrane filter layer is sleeved on the rear filter element assembly, and the rear filter element is The axial length of the filter element is h1, the axial length of the membrane filter layer is H1, and h1/H1 is 30% to 70%.

In one of the embodiments, a guide groove is provided on the outer peripheral surface of the end cap at a position covered by the membrane filter layer, and the liquid in the guide groove can flow into the rear filter element.

In one embodiment, the guide grooves are arranged along the axial direction of the membrane filter layer, the guide grooves are multiple, and the guide grooves are distributed at intervals in the circumferential direction of the outer peripheral surface of the end cover .

In one embodiment, the portion of the outer peripheral surface of the end cap covered by the membrane filter layer includes a water-sealing area, and the membrane filter layer and the end cap are connected at the water-sealing area, The diversion groove is located on the side of the water sealing area close to the rear filter element.

In one embodiment, the rear filter element and the end cover are both hollow structures to form a middle through hole of the rear filter element, and a support frame is provided in the rear filter element, and the support frame is supported on the rear filter element. On the inner peripheral surface of the rear filter element, the support frame is provided with a water passage hole.

In one embodiment, the membrane filter layer includes a reverse osmosis membrane filter layer, and the reverse osmosis membrane filter layer is wound on the rear filter element assembly;

Or, the membrane filter layer includes a nanofiltration membrane filter layer, and the nanofiltration membrane filter layer is sleeved on the rear filter element assembly.

In one of the embodiments, the end cap is provided with a guide hole, the inlet of the guide hole is located at a position covered by the membrane filter layer on the outer peripheral surface of the end cover, and the guide hole is The outlet is located on the end face of the end cover that is in contact with the rear filter element.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the system diagram of the water purifier system described in this embodiment;

2 is a system diagram of the water purifier system described in another embodiment;

Fig. 3 is the front view of the composite filter element in the water purifier system shown in Fig. 1;

Fig. 4 is the sectional view of A-A in Fig. 3;

5 is a cross-sectional view of the composite filter element in another embodiment;

Figure 6 is an exploded view of the composite filter element shown in Figure 3;

7 is a cross-sectional view of the composite filter element in yet another embodiment;

FIG. 8 is a schematic structural diagram of the isolation assembly and the pre-filter assembly in the composite filter element shown in FIG. 7 after being assembled;

9 is a cross-sectional view of the isolation assembly and the pre-filter shown in FIG. 8 after being assembled;

10 is a cross-sectional view of the isolation assembly and the pre-filter element assembled in another embodiment;

Figure 11 is an exploded view of the composite filter element shown in Figure 7;

12 is a front view of the rear filter element assembly and the membrane filter layer according to the present embodiment when they are assembled together;

Figure 13 is a sectional view taken along the direction B-B in Figure 12;

14 is a front view of the rear filter element assembly according to this embodiment;

Figure 15 is a sectional view taken along the direction C-C in Figure 14;

16 is a cross-sectional view of the rear filter element assembly in another embodiment.

Description of reference numbers:

10, composite filter element; 11, filter bottle; 111, first end; 1111, raw water inlet; 1112, pre-filter water outlet; 1113, pressurized water inlet; 1114, concentrated water outlet; 1115, purified water outlet ; 112, second end; 113, raw water gap; 114, pre-filtered water gap; 115, pressurized water gap; 116, clean water gap; 12, pre-filter element assembly; 13, pre-center pipe; 14, segmentation End cap; 141, water passage hole; 15, guide central pipe; 16, ultrafiltration membrane; 17, front end cap; 171, front water passage hole; 18, adapter sleeve; 19, water sealing piece; 20 , rear filter element assembly; 21, rear filter element; 211, support frame; 2111, water hole; 22, end cover; 221, diversion groove; 30, membrane filter layer; 31, water sealing area; 40, net Water machine system; 41, pressurized passage; 411, pressurized water pump; 412, first solenoid valve; 42, water purification passage; 421, pressure sensing element; 422, one-way valve; 43, additional passage; 44, concentrated water passage; 441, concentrated water solenoid valve; 45, faucet; 50, isolation assembly; 51, cylinder body; 511, first guide rib; 52, cylinder cover.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be 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. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in FIGS. 1 and 2 , in one embodiment, a water purifier system 40 is provided, including a composite filter element 10 , as shown in FIGS. 3 to 7 , the composite filter element 10 is integrated with a pre-filter The assembly 12 , the membrane filter layer 30 and the rear filter element assembly 20 . The composite filter element 10 is provided with a raw water inlet 1111 , a pre-filtered water outlet 1112 , a pressurized water inlet 1113 , a concentrated water outlet 1114 and a purified water outlet 1115 . As shown in FIG. 1 and FIG. 2 , a pressurized passage 41 is provided between the pre-filtered water outlet 1112 and the pressurized water inlet 1113 , and a pressurized water pump 411 is provided on the pressurized passage 41 . The raw water entering from the raw water inlet 1111 is filtered through the pre-filter element assembly 12 to obtain pre-filtered water, and the pre-filtered water is discharged into the pressurized passage 41 from the pre-filtered water outlet 1112 . The pre-filtered water entering from the pressurized water inlet 1113 is filtered through the membrane filter layer 30 to obtain concentrated water and pure water, the concentrated water is discharged from the concentrated water outlet 1114, and the pure water passes through the The rear filter element assembly 20 obtains purified water after filtering, and the purified water is discharged from the purified water outlet 1115 .

The water purifier system 40 provided by the above solution ensures the high integration of the composite filter element 10 by integrating the front filter element assembly 12, the membrane filter layer 30 and the rear filter element assembly 20 in the composite filter element 10. . During use, raw water such as tap water enters the composite filter element 10 from the raw water inlet 1111, and is filtered through the pre-filter element assembly 12 to obtain pre-filtered water. The pre-filtered water enters the pressurized passage 41 from the pre-filtered water outlet 1112, and the pressurized water pump 411 provides pressure to press the pre-filtered water in the pressurized passage 41 into the composite filter element 10 out of 10. The pressurized water pump 411 can provide pressure for the filtration of the membrane filter layer 30 to increase the water production efficiency of the membrane filter layer 30 , thereby increasing the overall water production flow of the water purifier system 40 . When the multi-stage filter element is integrated, the pre-filter element assembly 12 is provided upstream of the membrane filter layer 30 for filtration, resulting in a large pressure loss, so that the membrane filter layer 30 cannot perform effective filtration. Moreover, the pressurized water pump 411 is located downstream of the pre-filter element assembly 12, and the pre-filter element assembly 12 can filter out large-particle impurities and perform primary filtration on the raw water, thereby preventing large-particle impurities from contaminating the pressurized water pump 411, thereby extending the service life of the pressurized water pump 411.

Further, in one embodiment, as shown in FIG. 1 and FIG. 2 , the water purification outlet 1115 is provided with a water purification passage 42, and the water purification passage 42 is used to communicate with the faucet 45. The water purification passage 42 is provided with a pressure sensing element 421 , and the pressure sensing element 421 is electrically connected to the pressurized water pump 411 .

The pressure sensing element 421 controls the start and stop of the pressurized water pump 411 by sensing the pressure on the water purification passage 42 . When the faucet 45 is closed, the pressure in the water purification passage 42 increases, and when the pressure sensing element 421 detects that the pressure on the water purification passage 42 increases to a predetermined high pressure value, the pressurized water pump 411 is controlled to stop Operation to reduce the pressure in the water purifier system 40 . When the faucet 45 is turned on, the pressure in the water purification passage 42 decreases, and when the pressure sensing element 421 detects that the pressure in the water purification passage 42 drops to a predetermined low pressure value, it controls the pressurized water pump 411 to start . This keeps the water supply pressure stable at all times and improves the stability of the water supply flow.

The electrical connection between the pressure sensing element 421 and the pressurized water pump 411 may be indirectly electrically connected through a control system, and both the pressure sensing element 421 and the pressurized water pump 411 are electrically connected to the control system. sexual connection. In other words, after the pressure sensing element 421 senses the pressure on the water purification passage 42, the control system controls the pressurized water pump 411 to start and stop according to the sensed pressure.

Further, as shown in FIGS. 1 and 2 , in one embodiment, the pressurizing passage 41 is provided with a first solenoid valve 412 , and the first solenoid valve 412 is located between the pressurizing water pump 411 and the Between the pre-filtered water outlet 1112 , the first solenoid valve 412 is electrically connected to the pressure sensing element 421 .

When the pressure sensed by the pressure sensing element 421 indicates that the faucet 45 is closed, the first solenoid valve 412 electrically connected to the pressure sensing element 421 is closed, so that the pressure passage 41 is closed, and the front The water in the filtered water outlet 1112 cannot continue to flow along the pressurized passage 41 , and the composite filter element 10 stops filtering to protect the membrane filter layer 30 and the rear filter element assembly 20 . When the pressure sensed by the pressure sensing element 421 indicates that the tap 45 is turned on, the first solenoid valve 412 and the pressurized water pump 411 are turned on, and the composite filter element 10 enters a filtering state.

Further, in one embodiment, as shown in FIG. 2 , the water purifier system 40 further includes an additional passage 43 , and the additional passage 43 communicates between the pressurized passage 41 and the water tap 45 . The position on the pressurizing passage 41 for communicating with the additional passage 43 is located between the first solenoid valve 412 and the pre-filtering water outlet 1112 .

When the user has low requirements for water quality and the pre-filtered water filtered by the pre-filter assembly 12 can meet the requirements, the additional passage 43 can guide the pre-filtered water on the pressurized passage 41 to the faucet 45, for users to use. It should be noted that, as shown in FIG. 2 , when the user has different requirements on water quality, the faucet 45 is provided with at least two switches, which are respectively used to control the outflow of water of different quality. When the corresponding switch is turned on, the water in the corresponding passage flows out from the faucet 45 .

When the water quality of the pre-filtered water can meet the needs of the user, the switch on the faucet 45 for communicating with the water purification passage 42 is closed. When the pressure sensing member 421 senses that the pressure increases and reaches a predetermined high pressure value, the pressurized water pump 411 and the first solenoid valve 412 are both closed. At this time, the pre-filter element assembly 12 can still filter. The obtained pre-filtered water flows to the faucet 45 through the additional passage 43 for use by the user.

Further, in one embodiment, as shown in FIG. 1 and FIG. 2 , the concentrated water outlet 1114 is provided with a concentrated water passage 44 , and a concentrated water solenoid valve 441 is arranged on the concentrated water passage 44 . The water solenoid valve 441 is electrically connected to the pressure sensing element 421 . When the pressure sensing member 421 senses that the pressure on the water purification passage 42 reaches a predetermined high pressure value, it controls the concentrated water solenoid valve 441, the pressurized water pump 411 and the first solenoid valve 412 to close, and the membrane filter layer 30 Both the raw water side and the concentrated water side are closed, so that the pressure in the membrane filter layer 30 is stable.

Specifically, in one embodiment, the pressure sensing member 421 is a pressure switch for sensing the pressure on the water purification passage 42 , and the pressure switch is electrically connected to the pressurized water pump 411 . The water purification passage 42 is provided with a one-way valve 422, so that the water in the water purification passage 42 can only flow from the water purification outlet 1115 to the faucet 45, and the one-way valve 422 is located at the pressure. between the sensing element 421 and the purified water outlet 1115 . It is ensured that when the pressurized water pump 411 is stopped, the water in the water purification passage 42 will not flow back into the rear filter element assembly 20 .

Further specifically, in one embodiment, as shown in FIG. 4 and FIG. 5 , the composite filter element 10 includes a filter bottle 11 , the filter bottle 11 is provided with a split end cap 14 , and the filter bottle 11 is The space is divided into a first filter cavity and a second filter cavity in the axial direction. Or, in another embodiment, as shown in FIG. 7 , the filter bottle 11 is provided with an isolation assembly 50 for dividing the space in the filter bottle 11 into a first filter cavity and a second filter cavity that are independent of each other. filter cavity.

Further, as shown in FIG. 4 , FIG. 5 and FIG. 7 , the pre-filter element assembly 12 is located in the first filter cavity, and the membrane filter layer 30 and the rear filter element assembly 20 are both located in the first filter cavity. In the second filter cavity, the membrane filter layer 30 is sleeved outside the rear filter element assembly 20, and the pure water obtained by the membrane filter layer 30 is further filtered through the rear filter element assembly 20 to obtain purified water, Flow out from the purified water outlet 1115 . The raw water inlet 1111 , the pre-filtered water outlet 1112 , the pressurized water inlet 1113 , the concentrated water outlet 1114 and the purified water outlet 1115 are all arranged on the filter bottle 11 .

When the water purifier system 40 is installed, the pressurized passage 41 is connected between the pre-filtered water outlet 1112 and the pressurized water inlet 1113, the raw water inlet 1111 is communicated with the tap water pipe, and the purifier The water outlet 1115 communicates with the faucet 45 .

When the space in the filter bottle 11 is divided into two mutually independent filter chambers by the isolation assembly 50, the first filter chamber and the second filter chamber are independent of each other, and therefore there is no need for pressurization When the filter bottle 11 is deformed, the split end cap 14 used for dividing to form two filter chambers is separated from the filter bottle 11, resulting in the occurrence of water blowing between the first filter chamber and the second filter chamber.

Specifically, in one embodiment, as shown in FIGS. 7 to 11 , the isolation assembly 50 is a sealed housing structure. In other words, the inner space enclosed by the isolation component 50 constitutes the first filter cavity or the second filter cavity, and the second filter cavity or the second filter cavity is enclosed between the filter bottle 11 and the isolation component 50 . the first filter cavity. Therefore, no matter how the filter bottle 11 is deformed, the space enclosed by the isolation assembly 50 is still in a sealed state, so as to ensure that water will not leak between the two filter cavities.

When the inner space enclosed by the isolation component 50 is the first filter cavity, the second filter cavity is enclosed between the filter bottle 11 and the isolation component 50 , and the pre-filter component 12 is disposed in the in the isolation assembly 50 .

When the inner space enclosed by the isolation component 50 is the second filter cavity, the first filter cavity is enclosed between the filter bottle 11 and the isolation component 50 . The membrane filter layer 30 and the rear filter element assembly 20 are located in the isolation assembly 50 .

Further specifically, as shown in FIGS. 8 to 10 , in one embodiment, the isolation assembly 50 includes a cylinder body 51 and a cylinder cover 52 , and the cylinder cover 52 is sealedly connected with the opening of the cylinder body 51 to form a cylinder body 51 . The sealed housing structure.

Specifically, as shown in FIG. 9 , in one embodiment, a welding seal may be used between the cylinder body 51 and the cylinder cover 52 to achieve sealing between the cylinder cover 52 and the opening of the cylinder body 51 . connect. Therefore, no matter the external pressure of the cylindrical body 51 is relatively large, so that the cylindrical body 51 is subjected to an inward pressing force, or the internal pressure of the cylindrical body 51 is relatively large and is subjected to an outward pressing force, the cylindrical body 51 Both can be reliably connected with the cylinder cover 52 . The airtightness of the space enclosed by the cylinder body 51 and the cylinder cover 52 is ensured, and the first filter cavity and the second filter cavity are independent of each other, and no water blowing occurs.

Further, as shown in FIG. 9 , an annular installation groove may be provided on the cylinder cover 52 at a position opposite to the open end of the cylinder body 51, and the cylinder body 51 is inserted into the annular installation groove, and then The cylinder body 51 and the cylinder cover 52 are further welded to make the connection between the two more tight and reliable. Specifically, spin fusion welding may be used between the cylinder body 51 and the cylinder cover 52 .

Alternatively, in another embodiment, as shown in FIG. 10 , an annular installation groove is provided on the cylinder cover 52 at a position opposite to the open end of the cylinder body 51 , and the cylinder body 51 is inserted into the annular installation In the groove, a sealing member is provided between the cylindrical body 51 and the side wall of the annular installation groove.

Based on the fact that the cylindrical body 51 is inserted into the annular installation groove, and a sealing member is provided between the cylindrical body 51 and the side wall of the annular installation groove, when the cylindrical body 51 is pressed, The cylinder body 51 and the cylinder cover 52 can still be sealed and connected together without dislocation, ensuring that the first filter cavity and the second filter cavity are independent of each other, and no water blowing occurs. Case.

Specifically, the pre-filter element assembly 12 may include a carbon rod, and an origami filter element is provided outside the carbon rod; or, the pre-filter element assembly 12 may include a PAC (poly aluminum chloride) filter element.

Further, in one embodiment, as shown in FIG. 4 , FIG. 5 and FIG. 7 , one end of the filter bottle 11 for forming the second filter cavity is the first end 111 , and the raw water inlet 1111 , the pre-filtered water outlet 1112, the pressurized water inlet 1113, the concentrated water outlet 1114 and the purified water outlet 1115 are all arranged on the end face of the first end 111, thereby making the installation process of the water purifier system 40 easier Convenient.

Further, in one embodiment, the composite filter element 10 further includes a front center pipe 13 . As shown in FIG. 4 and FIG. 5 , when the split end cap 14 is provided in the filter bottle 11 , one end of the pre-center pipe 13 is communicated with the raw water inlet 1111 . The front center pipe 13 is inserted into the first filter cavity through the rear filter element assembly 20 and the split end cover 14 in sequence, so that the raw water entering the raw water inlet 1111 can flow into the first filter The pre-filtered water is obtained in the cavity after being filtered by the pre-filter element assembly 12 .

Further, in one embodiment, as shown in FIG. 7 , when the inner space enclosed by the isolation component 50 is the first filter cavity, the filter bottle 11 and the isolation component 50 are surrounded by the first filter cavity. when the second filter chamber. The pre-filter element assembly 12 is located in the inner space enclosed by the isolation assembly 50 , one end of the pre-center pipe 13 is communicated with the raw water inlet 1111 , and the other end of the pre-center pipe 13 needs to pass through in turn. The rear filter element assembly 20 and the end wall of the isolation assembly 50 close to the first end can be inserted into the first filter cavity.

When the inner space enclosed by the isolation component 50 is the second filter cavity, and the first filter cavity is enclosed between the filter bottle 11 and the isolation component 50 . The pre-center pipe 13 needs to penetrate the isolation assembly 50 and then be inserted into the first filter cavity, so that the raw water entering the pre-center pipe 13 from the raw water inlet 1111 can flow into the first filter The pre-filtered water is obtained in the cavity after being filtered by the pre-filter element assembly 12 .

Further, as shown in FIG. 4 , FIG. 5 and FIG. 7 , in one embodiment, the composite filter element 10 further includes a guide central pipe 15 . The guide center pipe 15 is sleeved outside the front center pipe 13, the guide center pipe 15 is located between the front center pipe 13 and the rear filter element assembly 20, and the guide center pipe 15 is connected to the The front central pipes 13 are arranged at intervals to form a pre-filtered water gap 114 .

As shown in FIG. 4 and FIG. 5 , when the split end cap 14 is provided in the filter bottle 11 , the split end cap 14 is provided with a water passage hole 141 , and the front center pipe 13 is inserted into the filter bottle 11 . In the water passage hole 141 , the front center pipe 13 is spaced apart from the side wall of the water passage hole 141 . The outer peripheral surface of the pre-filter element assembly 12 and the side wall of the filter bottle 11 are spaced apart to form a raw water gap 113 , and the pre-center pipe 13 communicates with the raw water gap 113 . The guiding center pipe 15 is communicated with the water passage hole 141 , and one end of the pre-filtered water gap 114 away from the water passage hole 141 is communicated with the pre-filter water outlet 1112 .

After the raw water enters the first filter cavity from the pre-center pipe 13, and then enters the raw water gap 113, the raw water is filtered from the outer periphery of the pre-filter element assembly 12 radially from the outside to the inside to obtain the pre-filtered water. . The pre-filtered water flows from the gap between the pre-center pipe 13 and the side wall of the water-passing hole 141 to the pre-filtered water gap 114 , and then flows along the pre-filtered water gap 114 to the The pre-filtered water outlet 1112 is described above. Both the raw water inlet 1111 and the pre-filtered water outlet 1112 can be arranged on the end face of the first end 111 .

Further, as shown in FIG. 7 , when the inner space enclosed by the isolation component 50 is the first filter cavity, and the second filter cavity is enclosed between the filter bottle 11 and the isolation component 50 . The end wall of the isolation assembly 50 near the first end is provided with a water passage hole 141, the front center pipe 13 is inserted into the water passage hole 141, and the front center pipe 13 is connected to the water passage hole 141. The sidewalls of the water passage holes 141 are arranged at intervals. A raw water gap 113 is formed between the outer peripheral surface of the pre-filter element assembly 12 and the side wall of the isolation assembly 50 , and the pre-center pipe 13 communicates with the raw water gap 113 . Therefore, the raw water entering the front central pipe 13 from the raw water inlet 1111 can reach the raw water gap 113, and the raw water flows inward from the outside of the pre-filter element assembly 12 to form pre-filtered water. The guiding center pipe 15 is communicated with the water passage hole 141 , and one end of the pre-filtered water gap 114 away from the water passage hole 141 is communicated with the pre-filter water outlet 1112 .

Further, when the space enclosed by the isolation assembly 50 is the second filter cavity, the water passage holes 141 are provided on both end walls of the isolation assembly 50, and the front center pipe 13 After passing through the two water passage holes 141, it extends into the first filter cavity. The guiding center pipe 15 is communicated with the water-passing jack 141 away from the first end, and the end of the pre-filtered water gap 114 away from the first filter cavity is communicated with the pre-filtered water outlet 1112 , Therefore, the pre-filtered water gap communicates with the first filter cavity and the pre-filtered water outlet 1112 .

Further, in one embodiment, as shown in FIG. 4 , FIG. 5 and FIG. 7 , the guiding central pipe 15 and the rear filter element assembly 20 are spaced apart to form a water purification gap 116 , and the water purification gap 116 is formed. The gap 116 communicates with the purified water outlet 1115 . The purified water filtered by the rear filter element assembly 20 enters the water purification gap 116 , and flows to the purified water outlet 1115 along the water purification gap 116 for the user to use.

Further, in one embodiment, as shown in FIG. 5 and FIG. 7 , the water purification gap 116 is provided with an ultrafiltration membrane 16 , so that the purified water is filtered through the ultrafiltration membrane 16 from the The water outlet 1115 is discharged. The water quality of the water obtained by filtration of the composite filter element 10 is further improved.

Further, in one embodiment, as shown in FIGS. 4 and 5 , when the split end cap 14 is provided in the filter bottle 11 , one end of the pre-filter element assembly 12 is connected to the split end cap 14 . Pressed tightly, the other end of the pre-filter element assembly 12 is provided with a front end cover 17 . The front end cover 17 is provided with a front water passage hole 171 penetrating both end surfaces of the front end cover 17 , and the front central pipe 13 communicates with the front water passage hole 171 . The end of the filter bottle 11 that is close to the pre-filter element assembly 12 is the second end 112, and a gap is provided between the front end cap 17 and the end wall of the second end 112, so that the pre- The water passage hole 171 communicates with the raw water gap 113 . The raw water flowing in from the front central pipe 13 flows to the raw water gap 113 along the front water passage hole 171 and the gap between the front end cover 17 and the end wall of the second end 112 in sequence .

Further, in one embodiment, as shown in FIG. 7 , when the space surrounded by the isolation component 50 is the first filter cavity. The pre-filter element assembly 12 is located in the isolation assembly 50, and one end of the pre-filter element assembly 12 is in close contact with the end wall of the isolation assembly 50 on which the water passage hole 141 is provided. The other end of the filter element assembly 12 is provided with the front end cover 17 . The front end cover 17 is provided with a front water passage hole 171 penetrating both end surfaces of the front end cover 17 , and the front central pipe 13 communicates with the front water passage hole 171 . A gap is provided between the front end cover 17 and the end wall of the isolation assembly 50 away from the first end, so that the front water passage hole 171 communicates with the raw water gap 113 .

Further, when the space enclosed by the isolation assembly 50 is the second filter cavity, one end of the pre-filter element assembly 12 is abutted against the end wall of the isolation assembly 50 away from the first end, so The other end of the front filter element assembly 12 is provided with the front end cover 17 . The front end cover 17 is provided with a front water passage hole 171 penetrating both end surfaces of the front end cover 17 , and the front central pipe 13 communicates with the front water passage hole 171 . The end of the filter bottle 11 that is close to the pre-filter element assembly 12 is the second end 112, and a gap is provided between the front end cap 17 and the end wall of the second end 112, so that the pre- The water passage hole 171 communicates with the raw water gap 113 .

Further, in one embodiment, as shown in FIG. 4 and FIG. 5 , when the second filter cavity is obtained by dividing the end cap 14, the membrane filter layer 30 and the filter bottle 11 and /or the split end caps 14 are arranged at intervals to form pressurized water gaps 115 . As shown in FIG. 7 , when the second filter cavity is surrounded by the filter bottle 11 and the isolation assembly 50 , the membrane filter layer 30 is connected to the filter bottle 11 and/or the isolation assembly 50 . The upper end walls near the first end are arranged at intervals to form a pressurized water gap 115 . When the second filter cavity is the space enclosed by the isolation assembly 50 , the membrane filter layer 30 and the side wall and/or the end wall of the isolation assembly 50 are spaced apart to form a pressurized water gap 115 .

The pressurized water gap 115 is communicated between the raw water inlet of the membrane filter layer 30 and the pressurized water inlet 1113 , and the concentrated water outlet 1114 is communicated with the concentrated water outlet of the membrane filter layer 30 .

The pre-filtered water in the pressurized passage 41 enters the pressurized water gap 115 under the action of the pressurized water pump 411, and after further filtering by the membrane filter layer 30, the concentrated water is removed from the concentrated water. The water outlet 1114 is discharged, and the pure water is further filtered through the rear filter element assembly 20 .

Specifically, as shown in FIGS. 4 to 7 , the end of the membrane filter layer 30 installed in the second filter cavity is provided with an adapter sleeve 18 and a water sealing member 19 . The water element 19 is disposed on one end of the membrane filter layer 30 away from the front filter element assembly 12 , the adapter sleeve 18 is connected to the end wall of the second end 112 , and the rear filter element assembly 20 is The end close to the second end 112 is pressed against the split end cap 14 . Thus, the pressurized water gap 115 is formed between the filter bottle 11 , the adapter sleeve 18 , the water sealing member 19 , the membrane filter layer 30 and the split end cap 14 .

Further, in one embodiment, as shown in FIGS. 14 to 16 , the rear filter element assembly 20 includes a rear filter element 21 and end caps 22 disposed at both ends of the rear filter element 21 . As shown in FIG. 12 and FIG. 13 , the membrane filter layer 30 is sleeved on the rear filter element assembly 20 . The pure water filtered by the membrane filter layer 30 can reach the rear filter element 21 for further filtration, and the purified water obtained by further filtration through the rear filter element 21 can pass through the middle of the rear filter element assembly 20 . out of the hole.

The membrane filter layer 30 and the rear filter element 21 are integrated in the above-mentioned way, and the end caps 22 at both ends of the rear filter element 21 can also be the same as the membrane filter layer 30 . The setting provides a force point. When the membrane filter layer 30 is sleeved on the rear filter element assembly 20 , the membrane filter layer 30 is connected with the outer peripheral surface of the end cover 22 .

Specifically, the membrane filter layer 30 may be a reverse osmosis membrane filter layer. The reverse osmosis membrane filter layer is rolled on the rear filter element assembly 20 , and during the rolling process, the rolling start edge of the reverse osmosis membrane filter layer is connected to the outer peripheral surface of the end cap 22 . Alternatively, the membrane filter layer 30 may also be a nanofiltration membrane filter layer, and the nanofiltration membrane filter layer is sleeved on the rear filter element assembly 20 . The nanofiltration membrane filter layer is connected to the outer peripheral surface of the end cap 22 .

Specifically, as shown in FIG. 13 and FIG. 14 , the portion of the outer peripheral surface of the end cap 22 covered by the membrane filter layer 30 includes a water sealing area 31 , and the membrane filter layer 30 is connected to the end cap. 22 is connected at the water sealing area 31, so that the water filtered by the membrane filter layer 30 can only flow to the rear filter element 21 for further filtration. Specifically, the membrane filter layer 30 and the end cap 22 may be connected by means of bonding.

Further, as shown in FIG. 12 and FIG. 13 , the axial length of the rear filter element 21 is h1 , the axial length of the membrane filter layer 30 is H1 , and h1 / H1 is 30% to 70%.

Compared with the general integrated filter element where the two filter elements that are nested with each other are set to have the same basic axial length, in this application, the axial length of the rear filter element 21 is set to the membrane filter layer 30 . 30% to 70% of the axial length. On the one hand, the filtration capacity of the rear filter element 21 can meet the needs of further filtration of the water filtered by the membrane filter layer 30; on the other hand, the axial length of the rear filter element 21 is reasonably controlled, and then The manufacturing cost of the composite filter element 10 is effectively controlled. Specifically, to compare the water production capacity of the membrane filter layer 30 and the generation capacity of the rear filter element 21 , it is only necessary to set the axial length h1 of the rear filter element 21 to the length of the membrane filter layer 30 . 30% to 70% of the axial length H1 is sufficient. At this time, the rear filter element 21 can further filter all the water filtered by the membrane filter layer 30 to meet the filtration requirements. It is avoided that the axial length of the rear filter element 21 is too long relative to the membrane filter layer 30 , resulting in a large redundancy of the rear filter element 21 and a low utilization rate. Moreover, compared with the manufacturing cost of the end cover 22, the manufacturing cost of the rear filter element 21 is relatively high, the material used is relatively brittle, and the strength is low. The reduction in the axial length increases the axial length of the end cover 22 , thereby reducing the overall manufacturing cost, improving the strength and stability of the rear filter element assembly 20 .

As shown in FIG. 14 , a guide groove 221 is provided on the outer peripheral surface of the end cover 22 at the position covered by the membrane filter layer 30 , and the liquid in the guide groove 221 can flow into the rear filter element 21 .

Therefore, the partially filtered water covered on the end cover 22 on the membrane filter layer 30 can flow into the rear filter element 21 through the guide groove 221 and be further filtered. In other words, in addition to the part of the membrane filter layer 30 opposite to the rear filter element 21 that can filter and generate water, the part corresponding to the end cap 22 can also participate in the filtering process of water. out, so as to increase the flow rate of the produced water of the membrane filter layer 30 . Since the axial length of the end cap 22 is longer, the membrane filter layer 30 covers more parts on the outer peripheral surface of the end cap 22. In order to further cover the membrane filter layer 30 on this part The water-producing capacity is fully utilized, and the diversion groove 221 is further provided to avoid excessive places on the membrane filter layer 30 that cannot lead out the water formed by filtration, resulting in the occurrence of excessive pressure. Further, under the condition of fully balanced consideration of the water production capacity, the cost is effectively controlled, the water production flow of the entire membrane filter layer 30 is guaranteed, and the water production flow of the water purifier system 40 pipes is increased.

Specifically, in one embodiment, based on the fact that the end cover 22 is disposed at the end of the rear filter element 21, and at least part of the surface of the end cover 22 is in contact with the rear filter element 21, the The guide groove 221 may extend to the surface of the end cover 22 that is in contact with the rear filter element 21 . For example, when the end surface of the end cover 22 is in contact with the rear filter element 21 , the guide groove 221 extends to the end surface of the end cover 22 that is in contact with the rear filter element 21 . Therefore, it is ensured that the water in the guide groove 221 can flow into the rear filter element 21 .

Alternatively, when the end cover 22 is at least partially sleeved outside the rear filter element 21, although the end surface of the end cover 22 sleeved outside the rear filter element 21 may not be in contact with the rear filter element 21 It directly contradicts, but surrounds the rear filter element 21 . However, since the end surface surrounds the rear filter element 21, the water flowing out of the end surface in the guide groove 221 can still enter the rear filter element 21, so the guide groove 221 can also extend so far.

Specifically, as shown in FIG. 15 and FIG. 16 , an annular groove is provided on the end surface of the end cover 22 that collides with the rear filter element 21 , and the end of the rear filter element 21 is inserted into the annular groove in order to improve the stability of the installation between the end cover 22 and the rear filter element 21, and at the same time make it easier for the water in the guide groove 221 on the outer peripheral surface of the end cover 22 to flow into the rear filter element 21, Do further filtering.

In the embodiment shown in FIG. 15 and FIG. 16 , the end of the rear filter element 21 is cut so that the end of the rear filter element 21 can be inserted into the annular groove, while the rear filter element 21 can be inserted into the annular groove. The outer peripheral surface of the filter element 21 is flush with the outer peripheral surface of the end cap 22 . At this time, the guide groove 221 may extend to the end surface of the end cover 22 that is in conflict with the rear filter element 21 .

If the radial thickness of the rear filter element 21 is consistent with the thickness of the annular groove, in other words, the end of the rear filter element 21 can be directly inserted into the annular groove without cutting. The outer diameter of 21 is smaller than the outer diameter of the end cap 22 . Then the end surface of the end cover 22 that surrounds the rear filter element 21 does not directly interfere with the rear filter element 21, but the guide groove 221 can extend to this end surface. At this time, the guide groove 221 The water in the filter can flow into the rear filter element 21 .

Further, in an embodiment, as shown in FIG. 14 , the guide grooves 221 are arranged along the axial direction of the membrane filter layer 30 . There are a plurality of the guide grooves 221 , and the plurality of guide grooves 221 are distributed at intervals in the circumferential direction of the outer peripheral surface of the end cover 22 . The water formed by filtration of each part of the membrane filter layer 30 on the outer peripheral surface of the end cover 22 in the circumferential direction is uniformly conducted to the rear filter element 21 to increase the overall water production flow.

Further, in one embodiment, as shown in FIG. 14 , the guide grooves 221 are provided on the outer peripheral surfaces of the two end caps 22 . In other words, the membrane filter layer 30 covers the end caps 22 at both ends of the rear filter element 21 , and the two ends of the membrane filter layer 30 are respectively sleeved on the outer peripheral surfaces of the two end caps 22 . Therefore, the rear filter element 21 is located between the two end caps 22 which are provided with the diversion grooves 221, and the water to be filtered flows to the rear filter element 21 at both ends of the rear filter element 21, so that the The filtering uniformity of the rear filter element 21 is relatively high.

Specifically, the rear filter element 21 is a water-passing type microporous filter element, so that the water-passing capacity of each position of the rear filter element 21 is relatively balanced. Compared with the general water-passing hole provided on the central pipe to achieve water-passing In this case, the use of the water-permeable microporous filter element can effectively improve the water-permeability uniformity.

Further, in one embodiment, the rear filter element 21 includes a carbon rod.

As shown in FIG. 16 , in one embodiment, the rear filter element 21 and the end cover 22 are both hollow structures, forming a middle through hole of the rear filter element assembly 20 , and the rear filter element 21 is filtered to obtain The purified water flows out from the middle through hole. The rear filter element 21 is provided with a support frame 211 , the support frame 211 is supported on the inner peripheral surface of the rear filter element 21 , and the support frame 211 is provided with a water passage hole 2111 . The support frame 211 supports the rear filter element 21 to prevent the rear filter element 21 from being damaged when the pressure outside the rear filter element 21 is relatively large. In particular, when the rear filter element 21 is the carbon rod, the carbon rod is a brittle material, and the setting of the support frame 211 improves the pressure bearing capacity of the carbon rod, effectively extending the rear filter element. 21 service life. The water passage holes 2111 on the support frame 211 facilitate the outflow of the purified water formed by the filtering of the rear filter element 21 .

Further, in an embodiment, as shown in FIG. 13 and FIG. 14 , the guide groove 221 is located on the side of the water sealing area 31 close to the rear filter element 21 . Therefore, the water sealing area 31 allows the water obtained by filtering the portion of the membrane filter layer 30 corresponding to the diversion groove 221 to only flow to the rear filter element 21 .

Further, in another embodiment, the end cap 22 is provided with a diversion hole, and the inlet of the diversion hole is located at the position where the outer peripheral surface of the end cap 22 is covered by the membrane filter layer 30 , the outlet of the guide hole is located on the end face of the end cover 22 that is in contact with the rear filter element 21 .

Therefore, the part of the membrane filter layer 30 that is covered on the outer peripheral surface of the end cover 22 can also participate in the process of filtering water, and the filtered water can flow to the rear through the guide hole. The filter element 21 is further filtered by the rear filter element 21 to obtain purified water. Therefore, under the condition of reducing the axial length of the rear filter element 21 , the cost is effectively controlled, and the water production capacity of the entire membrane filter layer 30 is guaranteed at the same time.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

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

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element 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 similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (20)

1. a water purifier system, is characterized in that, comprises composite filter element, in described composite filter element, integrates front filter element assembly, membrane filter layer and rear filter element assembly, described compound filter element is provided with raw water inlet, front A filter water outlet, a pressurized water inlet, a concentrated water outlet and a purified water outlet are provided, and a pressurized passage is arranged between the pre-filtered water outlet and the pressurized water inlet, and the pressurized passage is provided with Pressurized water pump, the raw water entering from the raw water inlet is filtered by the pre-filter element to obtain pre-filtered water, and the pre-filtered water is discharged into the pressurized passage from the pre-filtered water outlet, The pre-filtered water entering from the pressurized water inlet is filtered through the membrane filter layer to obtain concentrated water and pure water, the concentrated water is discharged from the concentrated water outlet, and the pure water passes through the post-filter Purified water is obtained after filtering by the filter element assembly, and the purified water is discharged from the purified water outlet. 2 . The water purifier system according to claim 1 , wherein the water purification outlet is provided with a water purification passage, the water purification passage is used to communicate with a faucet, and a pressure is provided on the water purification passage. 3 . A sensing element, the pressure sensing element is electrically connected with the pressurized water pump. 3 . The water purifier system according to claim 2 , wherein a first solenoid valve is provided on the pressurized passage, and the first solenoid valve is located between the pressurized water pump and the pre-filtered filter. 4 . Between the nozzles, the first solenoid valve is electrically connected to the pressure sensing element. 4 . The water purifier system according to claim 3 , further comprising an additional passage, the additional passage being communicated between the pressurizing passage and the faucet, and the pressurizing passage is used for connecting with the water faucet. 5 . The position where the additional passage communicates is located between the first solenoid valve and the pre-filtered water outlet. 5. The water purifier system according to claim 2, wherein the concentrated water outlet is provided with a concentrated water passage, and a concentrated water solenoid valve is arranged on the concentrated water passage, and the concentrated water solenoid valve is connected with The pressure sensing element is electrically connected. 6. The water purifier system according to any one of claims 2 to 5, wherein the pressure sensing element is a pressure switch, the pressure switch is electrically connected to the pressurized water pump, and the purified water There is a one-way valve on the passage, so that the water in the water purification passage can only flow from the water purification outlet to the faucet, and the one-way valve is located between the pressure switch and the pure water outlet . 7. The water purifier system according to any one of claims 1 to 5, wherein the composite filter element comprises a filter bottle, and the filter bottle is provided with a split end cap, and the space in the filter bottle is It is divided into a first filter cavity and a second filter cavity in the axial direction. The pre-filter element assembly is located in the first filter cavity, and the membrane filter layer and the rear filter element assembly are located in the second filter cavity. In the filter cavity, the membrane filter layer is sleeved outside the rear filter element assembly, and the raw water inlet, the pre-filtered water outlet, the pressurized water inlet, the concentrated water outlet and the purified water outlet are all arranged in the filter chamber. on the filter bottle. 8 . The water purifier system according to claim 7 , further comprising a pre-center pipe, one end of the filter bottle used to form the second filter cavity is the first end, and the raw water enters the water purifier system. 9 . The water inlet, the pre-filtered water outlet, the pressurized water inlet, the concentrated water outlet and the purified water outlet are all arranged on the end face of the first end, and one end of the front central pipe is communicated with the raw water inlet. The front central pipe is inserted into the first filter cavity through the rear filter element assembly and the split end cap in sequence. 9 . The water purifier system according to claim 8 , further comprising a guide center pipe, the guide center pipe is sleeved outside the front center pipe, and the guide center pipe is located in the front center pipe. 10 . Between the pipe and the rear filter element assembly, the guiding center pipe and the front center pipe are spaced to form a pre-filtering water gap, the split end cover is provided with a water-passing hole, and the The front center pipe is inserted into the water passage hole, the front center pipe is spaced from the side wall of the water passage hole, and the outer peripheral surface of the front filter element assembly and the side wall of the filter bottle are connected. They are arranged at intervals to form a raw water gap, the front central pipe is communicated with the raw water gap, the guide central pipe is communicated with the water passage hole, and the pre-filtered water gap is far away from the water passage hole. One end is communicated with the pre-filtered water outlet. 10 . The water purifier system according to claim 9 , wherein the guiding center pipe and the rear filter element assembly are arranged at intervals to form a water purification gap, and the water purification gap is connected to the water purification gap. 11 . The water outlet is connected. 11. The water purifier system according to claim 10, wherein an ultrafiltration membrane is arranged in the water purification gap, so that the purified water is filtered through the ultrafiltration membrane from the water purification outlet discharge. 12 . The water purifier system according to claim 9 , wherein one end of the pre-filter element is abutted against the split end cover, and the other end of the pre-filter element is provided with a front end cover, so the The front end cap is provided with a front water hole passing through two end faces of the front end cover, the front center pipe is communicated with the front water hole, and the filter bottle is close to the front water hole. One end of the front filter element assembly is the second end, and a gap is provided between the front end cover and the end wall of the second end, so that the front water passage hole communicates with the raw water gap. 13. The water purifier system according to claim 7, wherein the membrane filter layer and the filter bottle and/or the split end cap are arranged at intervals to form a pressurized water gap, and the pressurized water gap is formed. The water gap is communicated between the raw water inlet of the membrane filter layer and the pressurized water inlet, and the concentrated water outlet is communicated with the concentrated water outlet of the membrane filter layer. 14. The water purifier system according to any one of claims 1 to 5, wherein the rear filter element assembly comprises a rear filter element and end caps arranged at both ends of the rear filter element, and the membrane type The filter layer is sleeved on the rear filter element assembly, the axial length of the rear filter element is h1, the axial length of the membrane filter layer is H1, and h1/H1 is 30% to 70%. 15 . The water purifier system according to claim 14 , wherein a diversion groove is provided at a position covered by the membrane filter layer on the outer peripheral surface of the end cap, and the liquid in the diversion groove can flow into the rear filter. 16. The water purifier system according to claim 15, wherein the diversion grooves are arranged along the axial direction of the membrane filter layer, the diversion grooves are multiple, and the diversion grooves are located in the The outer peripheral surfaces of the end caps are distributed at intervals in the circumferential direction. 17 . The water purifier system according to claim 15 , wherein the portion of the outer peripheral surface of the end cap covered by the membrane filter layer includes a water sealing area, and the membrane filter layer is connected to the membrane filter layer. 18 . The end cap is connected at the water-sealing area, and the diversion groove is located on the side of the water-sealing area close to the rear filter element. 18 . The water purifier system according to claim 14 , wherein the rear filter element and the end cover are both hollow structures to form the middle through hole of the rear filter element assembly, and the rear filter element has a hollow structure. 19 . A support frame is provided, the support frame is supported on the inner peripheral surface of the rear filter element, and a water passage hole is arranged on the support frame. 19. The water purifier system according to claim 14, wherein the membrane filter layer comprises a reverse osmosis membrane filter layer, and the reverse osmosis membrane filter layer is wound on the rear filter element assembly; Or, the membrane filter layer includes a nanofiltration membrane filter layer, and the nanofiltration membrane filter layer is sleeved on the rear filter element assembly. 20 . The water purifier system according to claim 14 , wherein a guide hole is provided on the end cover, and the inlet of the guide hole is located on the outer peripheral surface of the end cover and is blocked by the membrane type. 21 . In the position covered by the filter layer, the outlet of the guide hole is located on the end face of the end cover that is in contact with the rear filter element.

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