CN211896328U - Composite filter element assembly and water purification system with same - Google Patents

Abstract

The utility model provides a compound filter element group spare and water purification system who has it, this compound filter element group spare includes: the first filter flask is provided with a first raw water inlet, a first pure water outlet, a first wastewater outlet, a second raw water inlet and a second wastewater outlet; the reverse osmosis filter element is accommodated in the first filter bottle and is communicated with the first raw water inlet, the first pure water outlet and the first wastewater outlet; the second filter bottle is accommodated in the reverse osmosis filter element and is provided with a second pure water outlet, and the second pure water outlet penetrates through the reverse osmosis filter element and is communicated to the raw water port of the reverse osmosis filter element; a flushing filter element located within the second filter flask; and the check valve is arranged in the second pure water outlet, a water inlet of the check valve is communicated with the pure water port of the flushing filter element, and a water outlet of the check valve is communicated with the original water port of the reverse osmosis filter element. Like this, the pure water that the utilization was washed the filter core and is produced replaces or washes, can reduce the low ion concentration of the preceding pure water of reverse osmosis filter core membrane, and the ion concentration of the first cup of water of having avoided the user to take is too high.

Description

Composite filter element assembly and water purification system with same

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a compound filter element group spare and water purification system who has it.

Background

With the pursuit of the public on the quality of life, the water purifier gradually enters the families of people. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer.

The raw water has higher TDS (total dissolved solids) more, and the reverse osmosis membrane purifier can block a large amount of ions in the raw water before the osmotic membrane under the effect of high-pressure pump, and makes the TDS of the water through the reverse osmosis membrane accord with the standard of direct drinking water. Meanwhile, the reverse osmosis filter element can discharge the wastewater with high ion concentration according to a certain proportion when the direct drinking water is prepared.

In the process of completing water preparation by the water purifier, although the wastewater can be discharged through the wastewater pipeline, a small amount of wastewater still remains in the reverse osmosis filter element before the reverse osmosis membrane after water preparation is completed. After the machine is stopped for a long time, ions can diffuse into the directly drinking water purified behind the membrane according to the principle that the ions diffuse from the high-concentration solution to the low-concentration solution, so that the purified directly drinking water behind the reverse osmosis membrane is polluted. When the next user gets water, the direct drinking water after being polluted will flow out together with the direct drinking water of new preparation, and the user will take the first section water that ion concentration is higher, seriously influences user experience.

For the life who improves reverse osmosis filter core, and solve the problem that causes the head cup water TDS too high behind the water permeable membrane before the reverse osmosis filter core membrane after above-mentioned purifier shuts down, can utilize the pure water of deposit to wash before the membrane usually to reduce the TDS value. However, as the water storage device is additionally arranged for storing water, the volume of the water purifier is greatly increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art at least in part, the utility model provides a composite filter element assembly, composite filter element assembly includes: the first filter bottle is provided with a first raw water inlet, a first pure water outlet, a first wastewater outlet, a second raw water inlet and a second wastewater outlet; the reverse osmosis filter element is accommodated in the first filter bottle, a raw water port of the reverse osmosis filter element is communicated with the first raw water inlet, a pure water port of the reverse osmosis filter element is communicated with the first pure water outlet, and a wastewater port of the reverse osmosis filter element is communicated with the first wastewater outlet; a second filter bottle contained within the reverse osmosis filter element, the second filter bottle having a second pure water outlet communicating through the reverse osmosis filter element to a raw water port of the reverse osmosis filter element; the flushing filter element is positioned in the second filter bottle, a raw water port of the flushing filter element is communicated with the second raw water inlet, a pure water port of the flushing filter element is communicated with the second pure water outlet, and a waste water port of the flushing filter element is communicated with the second waste water outlet; and the check valve is arranged in the second pure water outlet, a water inlet of the check valve is communicated with the pure water port of the flushing filter element, and a water outlet of the check valve is communicated with the original water port of the reverse osmosis filter element.

Therefore, the pure water generated by the flushing filter element is used for replacement or flushing, the pure water with low ion concentration is reserved in front of the reverse osmosis filter element membrane, and even if the reverse osmosis filter element membrane is standby for a long time, the ion concentration behind the reverse osmosis filter element membrane cannot be obviously increased due to the ion diffusion. Therefore, the phenomenon that the ion concentration of the received first cup of water is too high after the user stops for a long time and the use experience is influenced is avoided.

Illustratively, the opposite surfaces of the first filter flask are a first end and a second end respectively, the first raw water inlet is arranged at the first end, and the first pure water outlet, the first wastewater outlet, the second raw water inlet and the second wastewater outlet are arranged at the second end; the opposite surfaces of the second filter bottle are respectively a third end and a fourth end, the third end is close to the first end, the fourth end is close to the second end, and the second pure water outlet is formed in the third end.

Because the third end is close to first end, the water of washing the filter core filtration can get into former water district with the shortest route, replaces the water in former water district. The water flow path is more direct and short, not only is convenient to process, but also can improve the flow velocity of the water flowing out from the second pure water outlet, and improve the replacement efficiency. Other entrances and exits are arranged at the second end, so that the composite filter element assembly can be conveniently installed and used.

Exemplarily, the lateral wall of reverse osmosis filter core with be provided with the sealing washer between the inside wall of first filter flask, with the sealing washer with form between the first end the raw water district of reverse osmosis filter core, just the sealing washer with form between the second end the waste water district of reverse osmosis filter core, raw water district intercommunication first raw water entry with the raw water mouth of reverse osmosis filter core, waste water district intercommunication first waste water export with the waste water mouth of reverse osmosis filter core, be provided with the cavity in the reverse osmosis filter core, the cavity intercommunication first pure water export with the pure water mouth of reverse osmosis filter core.

Therefore, through the structure, the raw water area, the waste water area and the cavity which are not communicated with each other can be separated from the first filter flask and the reverse osmosis filter element. Effectively separate raw water, waste water and pure water, simple structure easily realizes.

Illustratively, the second filter bottle passes through the cavity, and the third end of the second filter bottle extends to the outside of the reverse osmosis filter element and is communicated with the raw water area.

Thus, pure water generated by flushing the filter element can directly flow into the raw water area to replace raw water in the raw water area, or the reverse osmosis filter element is flushed by the pure water.

Illustratively, the sealing ring is sleeved on an end portion of the reverse osmosis filter element close to the first end.

Therefore, the volume of the raw water area can be reduced, and the water quantity of the raw water in front of the reverse osmosis filter element membrane is further reduced, so that the ion quantity of the raw water diffusing to the back of the membrane is reduced.

Illustratively, the fourth end of the second filter flask is communicated with the second waste water outlet and the waste water inlet of the flushing filter element, the flushing filter element is provided with a central tube, one end of the central tube is communicated with the raw water inlet of the flushing filter element, and the other end of the central tube is communicated with the second raw water inlet.

Therefore, through the structure, the flushing filter element can be provided with an independent raw water port, a pure water port and a waste water port. The washing filter element can independently filter raw water, the produced waste water is directly discharged, and the generated pure water enters a raw water area. The flushing filter element and the reverse osmosis filter element can not interfere with each other in the process of filtering raw water respectively.

Illustratively, the flushing filter element includes any one of a reverse osmosis filter element, an ultrafiltration membrane filter element and a nanofiltration membrane filter element, or a composite filter element compounded with one or more of them.

Therefore, according to the requirements of environment and use conditions, the reverse osmosis filter core can be provided with washing water through different types of washing filter cores so as to be suitable for different environments, and the application range of the composite filter core assembly is enlarged.

Illustratively, the operating pressure of the flushing cartridge is less than the operating pressure of the reverse osmosis cartridge.

Therefore, the filter element with low pressure circulation capacity is simple to manufacture and low in cost, so that the cost of the product can be reduced by selecting the filter element with low working pressure for the flushing filter element.

According to another aspect of the utility model, still provide a water purification system, water purification system includes the booster pump, as above any kind of compound filter element group spare, first automatically controlled valve, second automatically controlled valve and controller, the delivery port intercommunication of booster pump to the water inlet of first automatically controlled valve with the water inlet of second automatically controlled valve, the delivery port intercommunication of first automatically controlled valve compound filter element group spare first raw water entry, the delivery port intercommunication of second automatically controlled valve compound filter element group spare the second raw water entry, the controller electricity is connected to the booster pump, first automatically controlled valve with the second automatically controlled valve, the controller is in control under the condition of booster pump work first automatically controlled valve or the second automatically controlled valve switches on.

Therefore, the phenomenon that the pure water behind the reverse osmosis filter element membrane is polluted due to the diffusion phenomenon of ions when the composite filter element assembly is stopped for a long time can be avoided.

Exemplarily, the water purification system further comprises a timer, the timer is used for timing the stalling time of the booster pump and sending the stalling time to the controller, and the controller controls the booster pump to work for a preset time period and controls the second electric control valve to conduct for the preset time period when the stalling time is larger than a preset threshold value.

The timer is arranged in the water purification system, and the stop time of the booster pump is timed, so that a balance point can be found in the cleanness degree of water received by a user and the water resource saving, and the water purification system can achieve the best use effect.

Illustratively, the first waste water outlet and/or the second waste water outlet of the water purification system are communicated with a waste water combination valve.

Therefore, the waste water ratio can be conveniently adjusted, the filter element can reach an optimal use state, the filter element can be prevented from being damaged due to excessive blockage of a waste water outlet, the waste water discharge amount can be reduced, and the waste of water resources is reduced.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a cross-sectional view of a composite filter element assembly according to an exemplary embodiment of the present invention; and

fig. 2 is a schematic water path diagram of a water purification system according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a composite filter element assembly; 200. a first filter flask; 201. a first end; 210. a first raw water inlet; 202. a second end; 220. a first pure water outlet; 230. a first wastewater outlet; 240. a second raw water inlet; 250. a second pure water outlet; 260. a second wastewater outlet; 300. a reverse osmosis filter element; 301. a raw water zone; 302. a waste water zone; 303. a cavity; 310. a raw water port of the reverse osmosis filter element; 320. a pure water port of the reverse osmosis filter element; 330. a wastewater port of the reverse osmosis filter element; 400. a second filter flask; 401. a third end; 402. a fourth end; 500. a check valve; 510. a water inlet of the check valve; 520. a water outlet of the check valve; 600. flushing the filter element; 610. flushing a raw water port of the filter element; 620. flushing a pure water port of the filter element; 630. flushing a waste water port of the filter element; 640. a central tube; 700. a seal ring; 810. a booster pump; 820. a first electrically controlled valve; 830. a second electrically controlled valve; 840. a waste water combination valve.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The utility model provides a compound filter element group spare 100, compound filter element group spare 100 includes: a first filter flask 200, a reverse osmosis filter element 300, a second filter flask 400, a check valve 500 and a flushing filter element 600. The first filter bottle 200 has a first raw water inlet 210, a first pure water outlet 220, a first waste water outlet 230, a second raw water inlet 240, and a second waste water outlet 260.

The reverse osmosis cartridge 300 is received in the first filter flask 200. The reverse osmosis cartridge 300 includes a raw water port 310 of the reverse osmosis cartridge, a pure water port 320 of the reverse osmosis cartridge, and a waste water port 330 of the reverse osmosis cartridge. The raw water is pressed into the reverse osmosis filter element 300 from the raw water port 310 of the reverse osmosis filter element by pressure, and pure water flows out from the pure water port 320 of the reverse osmosis filter element through the reverse osmosis filter element 300 by being filtered by the reverse osmosis filter element 300, and waste water, which does not pass through the reverse osmosis filter element 300, flows out from the waste water port 330 of the reverse osmosis filter element. The raw water port 310 of the reverse osmosis filter element is communicated with the first raw water inlet 210, the pure water port 320 of the reverse osmosis filter element is communicated with the first pure water outlet 220, and the waste water port 330 of the reverse osmosis filter element is communicated with the first waste water outlet 230. The raw water port 310 of the reverse osmosis filter element, the pure water port 320 of the reverse osmosis filter element and the waste water port 330 of the reverse osmosis filter element are isolated from each other in the reverse osmosis filter element 300 and are not communicated with each other.

The second filter bottle 400 may be disposed inside the reverse osmosis cartridge 300. The reverse osmosis cartridge 300 may surround the second filter flask 400 around the circumference thereof. The second filter bottle 400 has a second pure water outlet 250, and the second pure water outlet 250 may communicate through the reverse osmosis filter 300 to the raw water port 310 of the reverse osmosis filter.

A flushing cartridge 600 may be disposed within the second filter bottle 400. The raw water port 610 for washing the filter element is communicated with the second raw water inlet 240, the pure water port 620 for washing the filter element is communicated with the second pure water outlet 250, and the waste water port 630 for washing the filter element is communicated with the second waste water outlet 260.

The check valve 500 may be disposed in the second pure water outlet 250, a water inlet 510 of the check valve communicates with the pure water port 620 of the flushing filter element, and a water outlet 520 of the check valve communicates with the raw water port 310 of the reverse osmosis filter element. The function of the reverse osmosis membrane is to make the water flow in a fixed direction, and to prevent the water flow from reversely flowing back from the raw water port 310 of the reverse osmosis membrane to the second pure water outlet 250.

In one embodiment, the pure water received by the user through the composite filter element assembly 100 is prepared from the reverse osmosis filter element 300, and after the user receives the pure water, a portion of the raw water is left in front of the membrane of the reverse osmosis filter element 300, which may also be referred to as a raw water region 301, i.e., a region between the raw water inlet 310 and the first raw water inlet 210 of the reverse osmosis filter element. After a long-time shutdown, according to the principle that ions diffuse from a high-concentration solution to a low-concentration solution, ions in raw water before the membrane diffuse into pure water purified after the membrane, so that the ion concentration of the pure water after the reverse osmosis filter element membrane is increased. In order to avoid the above phenomenon, after the user finishes taking water, the pure water generated by flushing the filter element 600 is introduced to the membrane of the reverse osmosis filter element 300, and the pure water generated by flushing the filter element 600 is used to replace the raw water before the membrane of the reverse osmosis filter element 300, or the pure water generated by flushing the filter element 600 is used to flush the reverse osmosis filter element 300, and the raw water before the membrane of the reverse osmosis filter element 300 is discharged from the first wastewater outlet 230.

Thus, by replacing or flushing with pure water generated by the flushing filter element 600, pure water with low ion concentration is retained in front of the reverse osmosis filter element 300, and even after a long-time standby, the ion concentration of the reverse osmosis filter element 300 after the membrane is not remarkably increased due to the ion diffusion. Therefore, the phenomenon that the ion concentration of the received first cup of water is too high after the user stops for a long time and the use experience is influenced is avoided.

Illustratively, the opposing surfaces of the first filter bottle 200 are a first end 201 and a second end 202, respectively. A first raw water inlet 210 is provided at the first end 201 and a first pure water outlet 220, a first wastewater outlet 230, a second raw water inlet 240, and a second wastewater outlet 260 are provided at the second end 202.

The opposing faces of the second filter bottle 400 are a third end 401 and a fourth end 402, respectively. The third end 401 is disposed near the first end 201, the fourth end 402 is disposed near the second end 202, and the second pure water outlet 250 is disposed at the third end 401.

Since the third end 401 is close to the first end 201, the water filtered by the flushing filter element 600 can enter the raw water zone 301 by the shortest route, and the water in the raw water zone 301 is replaced. The water flow path is more direct and shorter, not only facilitating processing, but also improving the flow rate of the water flowing out of the second pure water outlet 250 and improving the replacement efficiency. Additional ports are provided in the second end 202 to facilitate installation and use of the composite filter element assembly 100.

Illustratively, a sealing ring 700 is disposed between an outer sidewall of the reverse osmosis filter element 300 and an inner sidewall of the first filter bottle 200, and the sealing ring 700 surrounds the reverse osmosis filter element 300, so that the reverse osmosis filter element 300 is hermetically connected with the first filter bottle 200. Between the first filter flask 200 and the reverse osmosis filter element 300, a raw water zone 301 of the reverse osmosis filter element 300 is formed between the sealing ring 700 and the first end 201. Between the first filter flask 200 and the reverse osmosis cartridge 300, the sealing ring 700 and the second end 202 form a waste water zone 302 of the reverse osmosis cartridge 300. The raw water zone 301 and the waste water zone 302 are not communicated with each other by the sealing action of the sealing ring 700. The raw water zone 301 communicates with the first raw water inlet 210 and the raw water port 310 of the reverse osmosis cartridge. The waste water zone 302 communicates between the first waste water outlet 230 and the waste water outlet 330 of the reverse osmosis cartridge.

Also disposed within reverse osmosis cartridge 300 is a cavity 303, which cavity 303 may be formed by an inward recess in the end of reverse osmosis cartridge 300 adjacent second end 202 of first filter bottle 200. The cavity 303 is enclosed by the reverse osmosis cartridge 300 and the second end 202 of the first filter bottle 200. The lower end of the reverse osmosis cartridge 300 may be connected to the second end 202 of the first filter flask 200 by a seal such that the cavity 303 is closed. The cavity 303 communicates only with the first pure water outlet 220 and the pure water port 320 of the reverse osmosis cartridge.

When raw water enters the raw water area 301 through the first raw water inlet 210, the raw water is pressed into the reverse osmosis filter element 300 through the raw water port 310 of the reverse osmosis filter element under the action of pressure, and pure water generated by filtration is extruded from the pure water port 320 of the reverse osmosis filter element, enters the cavity 303 and flows out from the first pure water outlet 220. And the wastewater, which is not filtered by the reverse osmosis filter element 300, flows out through the wastewater inlet 330 of the reverse osmosis filter element and is discharged from the first wastewater outlet 230.

Thus, the first filter flask 200 and the reverse osmosis filter element 300 are separated from each other by the above structure to form the raw water region 301, the waste water region 302, and the cavity 303, which are not communicated with each other. Effectively separate raw water, waste water and pure water, simple structure easily realizes.

In one embodiment, the reverse osmosis cartridge 300 may be provided with an opening proximate the first end 201 of the first filter flask 200. The second filter bottle 400 passes through the cavity 303, and the third end 401 of the second filter bottle 400 can extend out of the reverse osmosis filter element 300 through the opening on the reverse osmosis filter element 300 and is communicated with the raw water zone 301. Thus, pure water generated by washing the filter element 600 can directly flow into the raw water zone 301 to replace the raw water in the raw water zone 301 or wash the reverse osmosis filter element 300 with pure water.

Illustratively, the sealing ring 700 is fitted over the end of the reverse osmosis cartridge 300 proximate the first end 201. This reduces the volume of the raw water zone 301, which in turn reduces the amount of raw water before the reverse osmosis filter element 300 membrane, thereby reducing the amount of ions diffusing from the raw water back to the membrane.

Illustratively, the fourth end 402 of the second filter bottle 400 communicates with the second waste outlet 260 and the waste outlet 630 of the flushing cartridge. The flushing cartridge 600 has a center tube 640. One end of the central tube 640 communicates with the raw water port 610 of the flushing filter element, and the other end of the central tube 640 communicates with the second raw water inlet 240.

When raw water enters the flushing filter element 600 from the second raw water inlet 240 along the central tube 640 through the raw water port 610 of the flushing filter element, the flushing filter element 600 filters the raw water, and the generated pure water flows to the pure water port 620 of the flushing filter element. Under the action of the water flow pressure, pure water generated by filtering through the flushing filter element 600 pushes open the check valve 500, flows from the water inlet 510 of the check valve to the water outlet 520 of the check valve, and finally flows out from the second pure water outlet 250 to enter the raw water area 301.

While the waste water that is not filtered through the flushing filter cartridge 600 will flow out of the waste water inlet 630 of the flushing filter cartridge, since the waste water inlet 630 of the flushing filter cartridge is communicated with the second waste water outlet 260, the waste water generated by flushing the filter cartridge 600 will be directly discharged through the second waste water outlet 260.

It can be seen that, with the above arrangement, the flushing filter element 600 may have the raw water port 610 for flushing the filter element, the pure water port 620 for flushing the filter element, and the waste water port 630 for flushing the filter element, which are independent of each other. The washing filter element 600 can independently filter raw water, the produced wastewater is directly discharged, and the produced pure water enters the raw water area 301. The flushing filter element 600 and the reverse osmosis filter element 300 can be enabled not to interfere with each other in the process of filtering raw water.

Illustratively, the flushing filter cartridge 600 includes any one of a reverse osmosis filter cartridge, an ultrafiltration membrane filter cartridge, and a nanofiltration membrane filter cartridge, or a composite filter cartridge compounded with one or more of them. The common point of the reverse osmosis filter element, the ultrafiltration membrane filter element and the nanofiltration membrane filter element is that the filtration precision is higher, and the water quality safety is higher, so the reverse osmosis filter element can be used as a washing filter element of the reverse osmosis filter element 300. Therefore, according to the requirements of environment and use conditions, the reverse osmosis filter element 300 can be provided with washing water through different types of washing filter elements 600 so as to be suitable for different environments, and the application range of the composite filter element assembly 100 is expanded.

Illustratively, the operating pressure of the flushing cartridge 600 is less than the operating pressure of the reverse osmosis cartridge 300. Since the washing cartridge 600 functions to replace the raw water in the raw water zone 301 of the reverse osmosis cartridge 300 with pure water generated by washing the cartridge 600 or wash the reverse osmosis cartridge 300, the operating pressure for washing the cartridge 600 does not need to be high. For example, the working pressure of the reverse osmosis filter element 300 is usually above 0.6MPa, while the working pressure of the flushing filter element 600 only needs 0.02MPa-0.04 MPa.

Thus, the filter element with low pressure flow capacity is simple to manufacture and low in cost, so that the cost of the product can be reduced by selecting the filter element with low working pressure for the flushing filter element 600.

According to another aspect of the present invention, there is also provided a water purification system 800, as shown in fig. 2, the water purification system 800 comprises a booster pump 810, any one of the composite filter element assemblies 100 as described above, a first electric control valve 820, a second electric control valve 830 and a controller. The water outlet of the booster pump 810 is communicated to the water inlet of the first electronic control valve 820 and the water inlet of the second electronic control valve 830. The water outlet of the first electric control valve 820 is communicated with the first raw water inlet 210 of the composite filter element assembly 100, and the water outlet of the second electric control valve 830 is communicated with the second raw water inlet 240 of the composite filter element assembly 100.

The controller is electrically connected to the booster pump 810, the first electronically controlled valve 820 and the second electronically controlled valve 830. The controller controls the first electronic control valve 820 or the second electronic control valve 830 to be conducted under the condition that the booster pump 810 is operated.

In one embodiment, the user opens the booster pump 810 and the first electronically controlled valve 820 and closes the second electronically controlled valve 830 when he or she is getting water. Raw water is pressed into the reverse osmosis filter element 300 through the first raw water inlet 210 by the booster pump 810, and pure water can be taken in from the first pure water outlet 220 by a user through filtration, while unfiltered raw water flows out from the first waste water outlet 230. The above is the operation of the reverse osmosis cartridge 300, and is well known to those skilled in the art.

After the user stops taking water, a large amount of raw water is prevented from being stored in front of the membrane of the reverse osmosis filter element 300. The booster pump 810 and the second electrically controlled valve 830 may be opened and the first electrically controlled valve 820 may be closed, and raw water may be introduced into the flushing filter cartridge 600 through the second raw water inlet 240. The pure water generated by the flushing of the filter element 600 replaces the raw water before the membrane of the reverse osmosis filter element 300, i.e., the raw water in the raw water zone 301.

Therefore, the pollution of the pure water after the reverse osmosis filter element 300 is coated by the diffusion phenomenon of the ions when the composite filter element assembly 100 is stopped for a long time can be avoided.

Illustratively, water purification system 800 may also include a timer. The timer is used for timing the stalling time of the booster pump 810 and sending the stalling time to the controller, and the controller controls the booster pump 810 to work for a preset time period and controls the second electronic control valve 830 to be conducted for the preset time period when the stalling time is larger than a preset threshold value. In one embodiment, the preset threshold value may be set to T, and when the booster pump 810 stops working after the last water intake by the user, the timer starts to count the stall time and sends the stall time to the controller. When the stoppage time reaches T, the controller starts the booster pump 810 and opens the second electronic control valve 830, so that the raw water enters the flushing filter element 600 through the second raw water inlet 240, and the reverse osmosis filter element 300 is flushed by the pure water generated by flushing the filter element 600. The predetermined period of time may be set to T'. After the operating time of the booster pump 810 and the on-time of the second electronically controlled valve 830 reach T', the controller will stop the booster pump 810 and turn off the second electronically controlled valve 830.

If the time interval between the first water intake and the second water intake is relatively short, the diffusion of ions in the raw water during the time interval cannot lead to too high ion concentration in the water next taken by the user. Frequently use and wash filter core 600 and wash reverse osmosis filter core 300, not only waste water resource, but also increased the operating time of product part, reduced the life of product, influence user's use and experience. Therefore, by setting a timer in the water purification system 800 and counting the stop time of the booster pump 810, a balance point can be found in both the degree of cleanness of the water received by the user and the water saving resource, so that the water purification system 800 can achieve the best use effect.

Illustratively, the first waste water outlet 230 and/or the second waste water outlet 260 are in communication with a waste water combining valve 840. The waste water combination valve 840 may include a waste water ratio device and an electric control valve (not shown) connected in parallel, and the electric control valve may have a turn-on and turn-off function, and is in a turn-off state during a normal water making stage and a water taking stage of the water purification system 800. The filter element has the function of generating certain pressure in the filter element, so that raw water can permeate the filter element through the pressure, and the filtering effect is achieved.

And when washing the filter core, the automatically controlled valve will be in the on-state, because the automatically controlled valve switches on, so the water through-flow volume of filter core will improve greatly, owing to switching on of automatically controlled valve, the raw water that gets into the filter core will also take remaining impurity and pollutant on the filter core to flow from waste water mouth is whole in addition to reach the effect of washing.

The waste water ratio device is actually a throttling device, which can be connected with an electric control valve in parallel in the waste water combination valve 840, and the waste water ratio device is used for controlling the waste water to be discharged according to a certain proportion. The waste water ratio device is normally opened, and waste water generated by the filter element can be discharged through the waste water ratio device.

The ratio of pure water yield to waste water yield of the filter element can be adjusted by changing the throttle area of the waste water ratio device, which is hereinafter referred to as waste water ratio.

Therefore, the waste water ratio can be conveniently adjusted, the filter element can reach an optimal use state, the filter element can be prevented from being damaged due to excessive blockage of a waste water outlet, the waste water discharge amount can be reduced, and the waste of water resources is reduced.

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

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (11)

1. A composite filter element assembly, comprising:

a first filter flask (200) having a first raw water inlet (210), a first pure water outlet (220), a first wastewater outlet (230), a second raw water inlet (240), and a second wastewater outlet (260);

a reverse osmosis filter element (300) accommodated in the first filter bottle, wherein a raw water port (310) of the reverse osmosis filter element is communicated with the first raw water inlet, a pure water port (320) of the reverse osmosis filter element is communicated with the first pure water outlet, and a waste water port (330) of the reverse osmosis filter element is communicated with the first waste water outlet;

a second filter bottle (400) housed within the reverse osmosis cartridge, the second filter bottle having a second pure water outlet (250) communicating through the reverse osmosis cartridge to a raw water port of the reverse osmosis cartridge;

a flushing filter element (600) which is positioned in the second filter bottle, a raw water port (610) of the flushing filter element is communicated with the second raw water inlet, a pure water port (620) of the flushing filter element is communicated with the second pure water outlet, and a waste water port (630) of the flushing filter element is communicated with the second waste water outlet; and

and the check valve (500) is arranged in the second pure water outlet, a water inlet of the check valve is communicated with the pure water port of the flushing filter element, and a water outlet of the check valve is communicated with the original water port of the reverse osmosis filter element.

2. The composite filter element assembly according to claim 1, wherein the opposite faces of the first filter flask (200) are a first end (201) and a second end (202), respectively, the first raw water inlet (210) being arranged at the first end, the first pure water outlet (220), the first waste water outlet (230), the second raw water inlet (240) and the second waste water outlet (260) being arranged at the second end;

the opposite surfaces of the second filter bottle (400) are a third end (401) and a fourth end (402), the third end is close to the first end, the fourth end is close to the second end, and the second pure water outlet (250) is arranged at the third end.

3. The composite filter element assembly according to claim 2, wherein a sealing ring (700) is arranged between an outer side wall of the reverse osmosis filter element (300) and an inner side wall of the first filter bottle (200) to form a raw water zone (301) of the reverse osmosis filter element between the sealing ring and the first end (201) and a waste water zone (302) of the reverse osmosis filter element between the sealing ring and the second end (202), the raw water zone communicating the first raw water inlet (210) and a raw water inlet (310) of the reverse osmosis filter element, the waste water zone communicating the first waste water outlet (230) and a waste water outlet (330) of the reverse osmosis filter element, a cavity (303) being arranged in the reverse osmosis filter element, the cavity communicating the first pure water outlet (220) and a pure water outlet (320) of the reverse osmosis filter element.

4. The composite filter element assembly of claim 3, wherein the second filter bottle (400) passes through the cavity (303), the third end (401) of the second filter bottle extending beyond the reverse osmosis filter element in communication with the raw water zone (301).

5. The composite filter element assembly of claim 3, wherein the sealing ring (700) is fitted over the end of the reverse osmosis filter element (300) adjacent to the first end (201).

6. The composite filter element assembly according to claim 2, wherein the fourth end (402) of the second filter flask (400) communicates with the second waste water outlet (260) and the waste water port (630) of the flushing filter element, the flushing filter element (600) having a central tube (640) one end of which communicates with the raw water port (610) of the flushing filter element and the other end of which communicates with the second raw water inlet (240).

7. The composite filter element assembly of claim 1, wherein the flushing filter element (600) comprises any one of a reverse osmosis filter element, an ultrafiltration membrane filter element and a nanofiltration membrane filter element, or a composite filter element compounded with one or more of them.

8. The composite filter element assembly of claim 1, wherein the operating pressure of the flushing filter element (600) is less than the operating pressure of the reverse osmosis filter element (300).

9. A water purification system, comprising a booster pump (810), the composite cartridge assembly of any of claims 1-8, a first electrically controlled valve (820), a second electrically controlled valve (830), and a controller,

the water outlet of the booster pump is communicated with the water inlet of the first electric control valve and the water inlet of the second electric control valve, the water outlet of the first electric control valve is communicated with the first raw water inlet (210) of the composite filter element assembly, the water outlet of the second electric control valve is communicated with the second raw water inlet (240) of the composite filter element assembly,

the controller is electrically connected to the booster pump, the first electric control valve and the second electric control valve, and the controller controls the conduction of the first electric control valve or the second electric control valve under the condition that the booster pump works.

10. The water purification system of claim 9, further comprising a timer for timing a stall time of the booster pump (810) and sending the stall time to the controller, wherein the controller controls the booster pump to operate for a predetermined period of time and controls the second electrically controlled valve (830) to conduct for the predetermined period of time when the stall time is greater than a preset threshold.

11. The water purification system of claim 9, wherein the first waste water outlet and/or the second waste water outlet is in communication with a waste water combination valve (840).

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