CN216155632U

CN216155632U - Water purifier

Info

Publication number: CN216155632U
Application number: CN202122172735.0U
Authority: CN
Inventors: 龚圆杰; 张涛; 周栋; 何海; 范婷
Original assignee: Guangdong Chunmi Electrical Technology Co Ltd
Current assignee: Guangdong Chunmi Electrical Technology Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-04-01
Anticipated expiration: 2031-09-08

Abstract

The present disclosure relates to a water purifier. This leading composite filter core of water purifier the inside integrated water drive jar, the water drive jar contains: the water purifier comprises an elastic water bag, a pure water cavity formed by coating the inner wall of the elastic water bag and used for storing pure water, and an external water cavity formed between the outer wall of the elastic water bag and the shell of the front composite filter element and used for injecting an external water source; wherein, the pressure of outside water source extrudees the elasticity water bag in the outside water cavity, extrudees the mouth of a river of cominging in and going out of the pure water in the pure water cavity through the pure water cavity, and the pure water can get into the water inlet end of RO filter core to waste water before the RO membrane can be progressively extruded by the pure water that gets into and get into the water inlet end of leading composite filter core, thereby get into the water mixing of elasticity water bag outside and outside water source. Like this, the water purifier is after shutting down for a long time, and the user next water receiving can not go out the condition emergence that has high concentration TDS, and the water purifier when implementing pure water bubble membrane procedure, can not produce waste water waste basically, promotes whole water resource utilization efficiency greatly.

Description

Water purifier

Technical Field

The present disclosure relates to the field of water purification control technology, and in particular, to a water purifier.

Background

Domestic water purifier products currently take an RO reverse osmosis machine type as a mainstream, and the products are continuously developed in the direction of gradually increasing flux. Because of the characteristic restriction of RO filtering principle, the product is the waste water concentration before the RO membrane is very high when shutting down, and mineral ion can slowly permeate to the membrane back pure water end of low concentration, leads to the pure water TDS value behind the membrane to rise, and the water that the user began to connect when next water use all is the high concentration water of high TDS.

In order to solve the problem, some manufacturers replace the high-concentration waste water behind the membrane with tap water or pure water after the machine stops water production, so that the hidden danger that TDS (total dissolved solids) at the pure water end behind the membrane is increased too much due to the fact that the machine does not work for a long time is reduced. The waste water displaced by the scheme is directly discharged outside the machine and wasted, and the same action is repeated after water is produced every time, so that the actual utilization efficiency of the machine to water resources is greatly reduced.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, embodiments of the present disclosure provide a water purifier. The technical scheme is as follows:

according to a first aspect of embodiments of the present disclosure, there is provided a water purifier including:

one end of the water inlet pipeline is connected with the water inlet end of the front composite filter element, and the other end of the water inlet pipeline is connected with an external water source and used for providing raw water to be purified for the water purifier; leading composite filter element the inside water drive jar that has integrateed, the water drive jar contains: the water purifier comprises an elastic water bag, a pure water cavity formed by coating the inner wall of the elastic water bag and used for storing pure water, and an external water cavity formed between the outer wall of the elastic water bag and the shell of the front composite filter element and used for injecting an external water source;

one end of the water purification pipeline is connected with the water outlet end of the preposed composite filter element, the other end of the water purification pipeline is connected with the water inlet end of the RO filter element, and a first electromagnetic valve and a booster pump are arranged on the water purification pipeline;

one end of the elastic water bag water filling pipeline is connected with the pure water outlet of the RO filter element, and the other end of the elastic water bag water filling pipeline is connected with the water inlet and outlet of the pure water cavity; the water replenishing pipeline of the elastic water bag is provided with a first check valve, a second check valve and a high-pressure switch;

one end of the water outlet pipeline is connected between the first check valve and the second check valve, and the other end of the water outlet pipeline is a water outlet of the water purifier;

one end of the pure water bubble membrane pipeline is connected with a water inlet and a water outlet of the pure water cavity, and the other end of the pure water bubble membrane pipeline is connected with a water inlet end of the RO filter element; the pure water bubble film pipeline is provided with a second electromagnetic valve and a third check valve;

one end of the waste water pipeline is a waste water interface of the water purifier, and the other end of the waste water pipeline is communicated with a waste water outlet of the RO filter element; a third electromagnetic valve and a waste water valve are arranged on the waste water pipeline;

one end of the return pipeline is connected with the wastewater outlet of the RO filter element, and the other end of the return pipeline is connected with the water inlet end of the preposed composite filter element; the backflow pipeline is provided with a fourth electromagnetic valve and a fourth check valve, wherein the water pressure in the external water cavity is larger than the water pressure in the pure water cavity, the elastic water bag is extruded by the pressure of an external water source in the external water cavity, so that the pure water in the pure water cavity is extruded out through the water inlet and outlet of the pure water cavity and flows into the membrane filter element, the concentrated water on the concentrated water side of the membrane filter element is replaced, and the concentrated water flows to the water inlet end of the front composite filter element through the backflow pipeline to enter the external water cavity.

The present disclosure provides a water purifier, including: one end of the water inlet pipeline is connected with the water inlet end of the preposed composite filter element, and the other end of the water inlet pipeline is connected with an external water source and used for providing raw water to be purified for the water purifier; leading composite filter element the inside integrated water drive jar, water drive jar contains: the water purifier comprises an elastic water bag, a pure water cavity formed by coating the inner wall of the elastic water bag and used for storing pure water, and an external water cavity formed between the outer wall of the elastic water bag and the shell of the front composite filter element and used for injecting an external water source; one end of the water purification pipeline is connected with the water outlet end of the preposed composite filter element, the other end of the water purification pipeline is connected with the water inlet end of the RO filter element, and a first electromagnetic valve and a booster pump are arranged on the water purification pipeline; one end of the elastic water bag water filling pipeline is connected with the pure water outlet of the RO filter element, and the other end of the elastic water bag water filling pipeline is connected with the water inlet and outlet of the pure water cavity; the water replenishing pipeline of the elastic water bag is provided with a first check valve, a second check valve and a high-pressure switch; one end of the water outlet pipeline is connected between the first check valve and the second check valve, and the other end of the water outlet pipeline is a water outlet of the water purifier; one end of the pure water bubble membrane pipeline is connected with a water inlet and a water outlet of the pure water cavity, and the other end of the pure water bubble membrane pipeline is connected with a water inlet end of the RO filter element; the pure water bubble film pipeline is provided with a second electromagnetic valve and a third check valve; one end of the waste water pipeline is a waste water interface of the water purifier, and the other end of the waste water pipeline is communicated with a waste water outlet of the RO filter element; a third electromagnetic valve and a waste water valve are arranged on the waste water pipeline; one end of the return pipeline is connected with a wastewater outlet of the RO filter element, and the other end of the return pipeline is connected with a water inlet end of the preposed composite filter element; the backflow pipeline is provided with a fourth electromagnetic valve and a fourth check valve, wherein the water pressure in the external water cavity is larger than the water pressure in the pure water cavity, the elastic water bag is extruded by the pressure of an external water source in the external water cavity, so that pure water in the pure water cavity is extruded out through the water inlet and outlet of the pure water cavity and flows into the membrane filter element, concentrated water on the concentrated water side of the membrane filter element is replaced, and the concentrated water flows to the water inlet end of the front composite filter element through the backflow pipeline to enter the external water cavity. Furthermore, when the pure water is subjected to membrane soaking, the pressure of the water in the elastic water bag is reduced to normal pressure, the elastic water bag is extruded by the pressure of an external water source, the pure water in the pure water cavity in the elastic water bag is extruded outwards, and the pure water enters the water inlet end of the RO filter element through the second electromagnetic valve and the third check valve. At this moment, because the water outlet of the water purifier and the wastewater interface of the water purifier are closed, wastewater in front of the RO membrane can be gradually extruded by the entering pure water and enters the water inlet end of the front composite filter element through the fourth electromagnetic valve and the fourth check valve, so that the wastewater enters the outer side of the elastic water bag to be mixed with water of an external water source. Like this, the water purifier is after shutting down for a long time, and the user next water receiving can not go out the condition emergence that has high concentration TDS, and the water purifier when implementing pure water bubble membrane procedure, can not produce waste water waste basically, promotes whole water resource utilization efficiency greatly.

In one embodiment, the second check valve is a pressure relief valve;

the forward direction of the first check valve is the direction from the pure water outlet to the water outlet of the water purifier;

the positive direction of the pressure release valve is the direction from the pure water outlet to the pure water cavity;

the forward direction is the direction in which the first check valve and the pressure relief valve allow water to flow;

the high-pressure switch is used for controlling the first electromagnetic valve to be closed when the pressure in the pure water cavity is greater than a preset threshold value, controlling the second electromagnetic valve and the fourth electromagnetic valve to be closed when the pressure in the pure water cavity is less than or equal to the preset threshold value, and opening the third electromagnetic valve.

In one embodiment, the forward direction of the third check valve is the direction from the plain water chamber to the water inlet end of the RO cartridge.

In one embodiment, the forward direction of the fourth check valve is the direction from the wastewater outlet of the RO filter element to the water inlet end of the pre-composite filter element.

In one embodiment, the water inlet pipeline is connected with a tap water pipeline and is provided with a pressure reducing valve.

In one embodiment, a first TDS sensor is arranged between the water outlet end of the preposed composite filter element and the first solenoid valve.

In one embodiment, further comprising: a flow meter;

one end of the flow meter is connected between the first check valve and the second check valve, and the other end of the flow meter is connected with the water outlet of the water purifier.

In one embodiment, a second TDS sensor is also disposed between the flow meter and the water outlet of the water purifier.

In one embodiment, the other end of the pure water bubble membrane pipeline is connected with the water inlet end of the RO filter element through the adding pump.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic view illustrating a structure of a water purifier according to an exemplary embodiment.

Fig. 2 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Fig. 3 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Fig. 4 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Fig. 5 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Fig. 6 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Fig. 7 is a schematic structural view of a water purifier shown according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural view illustrating a water purifier according to an exemplary embodiment, as shown in fig. 1, including:

one end of the water inlet pipeline 10 is connected with the water inlet end a of the front composite filter element 20, and the other end of the water inlet pipeline 10 is connected with an external water source and is used for providing raw water to be purified for the water purifier; leading composite filter element 20 the inside integrated water drive jar, water drive jar contains: the elastic water bag 21, a pure water cavity 22 formed by coating the inner wall of the elastic water bag 21 and used for storing pure water, and an external water cavity 23 formed between the outer wall of the elastic water bag 21 and the shell of the front composite filter element 20 and used for injecting external water; wherein, the elastic water bag 21 is extruded by the pressure of the external water source in the external water cavity 23, so that the pure water in the pure water cavity 22 is extruded out through the water inlet and outlet b of the pure water cavity 22;

wherein, leading composite filter core can include: leading PPC filter core.

For example, since the filtered pure water is located inside the elastic water bag 21, and the water of the external water source is located outside the elastic water bag 21, when the pressure of the external water source is greater than the pressure of the internal pure water, that is, when the pressure outside the elastic water bag 21 is greater than the pressure inside the elastic water bag 21, the elastic water bag 21 is pressed inward under the action of the pressure, and at this time, the pure water inside the elastic water bag 21 (the pure water chamber 22) is squeezed out from the water inlet/outlet b of the pure water chamber 22.

In the present disclosure, the elastic water bag 21 may have only one water inlet and outlet, that is, the water inlet and outlet b of the pure water chamber 22, external pure water may enter the pure water chamber 22 through the water inlet and outlet b of the pure water chamber 22, and pure water inside the pure water chamber 22 may also be discharged out of the pure water chamber 22 through the water inlet and outlet b of the pure water chamber 22.

A purified water pipeline 30, one end of the purified water pipeline 30 is connected with the water outlet end c of the pre-composite filter element 20, the other end is connected with the water inlet end d of a Reverse Osmosis (RO) filter element 40, and the purified water pipeline 30 is provided with a first electromagnetic valve 31 and a booster pump 32;

an elastic water bag water filling pipeline 50, wherein one end of the elastic water bag water filling pipeline 50 is connected with the pure water outlet f of the RO filter element 40, and the other end is connected with the water inlet and outlet b of the pure water cavity 22; the water replenishing pipeline 50 of the elastic water bag is provided with a first check valve 51, a second check valve 52 and a high-pressure switch 53;

illustratively, the forward direction of the first check valve 51 is the direction from the pure water outlet f of the RO filter cartridge 40 to the water outlet of the water purifier; the forward direction of the first check valve 51 is the direction in which the first check valve 51 allows the water flow.

The second check valve 52 may include a pressure relief valve.

The forward direction of the relief valve is the direction from the pure water outlet f of the RO filter cartridge 40 to the pure water chamber 22; the positive direction of the pressure relief valve is the direction in which the pressure relief valve allows the flow of water to pass.

The high-pressure switch 53 is used to control the first solenoid valve 31 to close when the pressure in the pure water chamber 22 is greater than a preset threshold, control the second solenoid valve 71 and the fourth solenoid valve 91 to close when the pressure in the pure water chamber 22 is less than or equal to a preset threshold, and open the third solenoid valve 81.

And one end of the water outlet pipeline 60 is connected between the first check valve 51 and the second check valve 52, and the other end of the water outlet pipeline 60 is a water outlet of the water purifier.

A pure water bubble membrane pipeline 70, wherein one end of the pure water bubble membrane pipeline 70 is connected with the water inlet and outlet b of the pure water cavity 22, and the other end is connected with the water inlet end d of the RO filter element 40; the pure water bubble film pipeline 70 is provided with a second electromagnetic valve 71 and a third check valve 72;

illustratively, the forward direction of the third check valve 72 is the direction from the pure water chamber 22 to the water inlet end d of the RO cartridge 40.

The forward direction of the third check valve 72 is the direction in which the third check valve 72 allows water flow.

In one implementation, as shown in fig. 1, the other end of the pure water bubble membrane line 70 is directly connected to the water inlet end d of the RO cartridge 40.

In another implementation, as shown in fig. 2, the other end of the pure water bubble membrane line 70 is connected to the water inlet end d of the RO cartridge 40 through the booster pump 32. That is, the other end of the pure water bubble membrane pipeline 70 is connected to one end of the booster pump 32, and the other end of the booster pump 32 is connected to the water inlet end d of the RO filter cartridge 40.

One end of the waste water pipeline 80 is a waste water interface of the water purifier, and the other end of the waste water pipeline 80 is communicated with a waste water outlet e of the RO filter element 40; the waste water pipeline 80 is provided with a third electromagnetic valve 81 and a waste water valve 82;

one end of the return pipeline 90 is connected with a wastewater outlet e of the RO filter element 40, and the other end is connected with a water inlet end a of the front composite filter element 20; the return line 90 is provided with a fourth solenoid valve 91 and a fourth check valve 92; wherein, the water pressure in the outer water cavity 23 is greater than the water pressure in the pure water cavity 22, and the elastic water bag 21 is squeezed by the pressure of the outer water source in the outer water cavity 23, so that the pure water in the pure water cavity 22 is squeezed out through the water inlet and outlet of the pure water cavity 22 and flows into the membrane filter element, the concentrated water on the concentrated water side of the membrane filter element is replaced, and the concentrated water flows to the water inlet end a of the front composite filter element 20 through the return pipeline 90 to enter the outer water cavity 23.

Illustratively, the forward direction of the fourth check valve 92 is the direction from the waste water outlet e of the RO cartridge 40 to the water inlet a of the front composite cartridge 20. The forward direction of the fourth check valve 92 is the direction in which the fourth check valve 92 allows the water flow.

As an example, the water purifier shown in fig. 1 has three operation states:

firstly, when the water purifier produces water, a water outlet of the water purifier is opened, the first electromagnetic valve 31 and the third electromagnetic valve 81 are opened, and the fourth electromagnetic valve 91 and the second electromagnetic valve 71 are closed; water from an external water source enters the pre-composite filter element 20 for filtration, the filtered water comes out from the water outlet end of the pre-composite filter element 20 and sequentially enters the water inlet end d of the RO filter element 40 through the first electromagnetic valve 31 and the booster pump 32, pure water filtered by the RO filter element 40 comes out from the pure water outlet f of the RO filter element 40 and is discharged from the water outlet of the water purifier for use by a user, and wastewater generated by filtration of the RO filter element 40 passes through the third electromagnetic valve 81 and the wastewater valve 82 and is discharged from the wastewater interface of the water purifier.

Specifically, the description will be given taking an example in which the external water source is tap water and the water outlet of the water purifier is connected to a water purification faucet. When the water purifier produces water, a user opens the water purifying faucet, starts the first electromagnetic valve 31 to open, opens the third electromagnetic valve 81, closes the fourth electromagnetic valve 91 and closes the second electromagnetic valve 71, and then tap water enters the preposed composite filter element 20 to be filtered to remove large-particle impurities such as silt and residual chlorine; the primarily filtered water comes out from the front composite filter element 20, passes through the first electromagnetic valve 31, enters the booster pump 32, is pressurized, enters the RO filter element 40 after being pressurized, is filtered by an RO membrane to remove most metal ions, is discharged from a pure water faucet from a pure water outlet f of the RO filter element 40 for a user to use, and high-concentration wastewater generated by filtering is discharged from a wastewater interface of the water purifier through the third electromagnetic valve 81 and the wastewater valve 82.

Secondly, when the elastic water bag 21 is replenished with water, the water outlet of the water purifier is closed, the first electromagnetic valve 31 and the third electromagnetic valve 81 are opened, the fourth electromagnetic valve 91 and the second electromagnetic valve 71 are closed, pure water filtered by the RO filter element 40 sequentially passes through the first check valve 51, the pressure release valve and the high-pressure switch 53 and then enters the pure water cavity 22, the pressure in the pure water cavity 22 in the elastic water bag 21 continuously rises along with the replenishing water, when the pure water cavity 22 is filled with water to a preset volume, the pressure in the elastic water bag 21 reaches a first threshold value (the first threshold value is a value for triggering the high threshold value of the high-pressure switch 53), the high-pressure switch 53 controls to close the first electromagnetic valve 31, and at the moment, the machine stops water production;

continuing to follow the above example, after the user closes the water purification faucet, the water purifier continues to produce water, at this moment, because of the water purification faucet is closed, the pure water from the RO filter element 40 sequentially passes through the first check valve 51, the pressure release valve, and the high pressure switch 53 and then enters the pure water cavity 22 of the elastic water bag 21 integrated in the pre-composite filter element 20, at this moment, because the RO water production water pressure is greater than the tap water pressure, the elastic water bag 21 can continuously supplement water and swell, simultaneously, the pressure in the elastic water bag 21 continuously rises along with the supplement water, when the pressure rises to a certain degree after the water is supplemented, when the high pressure switch 53 is triggered to reach a high threshold (such as 0.35MPa), the high pressure switch 53 acts to output a signal to close the first electromagnetic valve 31, and at this moment, the water purifier stops producing water.

Thirdly, when the membrane is soaked in pure water, the first electromagnetic valve 31 and the third electromagnetic valve 81 are closed, the second electromagnetic valve 71 and the fourth electromagnetic valve 91 are opened, the elastic water bag 21 is squeezed by the pressure of the external water source to extrude the pure water in the elastic water bag 21 outwards, the pure water enters the water inlet end d of the RO filter element 40 through the second electromagnetic valve 71 and the third check valve 72, the wastewater in front of the RO membrane is gradually squeezed out by the entering pure water, enters the water inlet end a of the front composite filter element 20 through the fourth electromagnetic valve 91 and the fourth check valve 92, and enters the outer side of the elastic water bag 21 to be mixed with the external water source. When the pressure in the pure water chamber 22 in the elastic water bag 21 decreases to the second threshold value, the high-pressure switch 53 outputs a signal to close the second solenoid valve 71 and the fourth solenoid valve 91, and the third solenoid valve 81 opens.

Specifically, when the pure water film-soaking function is needed, the first electromagnetic valve 31 is closed, the second electromagnetic valve 71 is opened, the third electromagnetic valve 81 is closed, the fourth electromagnetic valve 91 is opened, the water pressure of the pure water cavity 22 inside the elastic water bag 21 is reduced to the normal pressure, the elastic water bag 21 is extruded by the tap water pressure, the pure water in the pure water cavity 22 of the elastic water bag 21 is extruded outwards, and the pure water enters the water inlet end d of the RO filter element 40 through the second electromagnetic valve 71 and the third check valve 72. At this time, because the waste water connectors of the water purifying faucet and the water purifier are closed, the waste water in front of the RO membrane is gradually extruded by the entering pure water, enters the water inlet end a of the front composite filter element 20 through the fourth electromagnetic valve 91 and the fourth check valve 92, and enters the outer side of the elastic water bag 21 to be mixed with tap water. When the elastic water bag 21 is nearly completely deflated and the pressure of the pure water cavity 22 in the elastic water bag 21 is reduced to a certain threshold (e.g. 0.09MPa), the high-voltage switch 53 operates to output a signal to close the second solenoid valve 71 and the fourth solenoid valve 91, and open the third solenoid valve 81, thereby completing the pure water film-foaming operation. High concentration waste water before the RO membrane is replaced by the pure water completely this moment, and the pure water environment of low concentration is all arranged in to RO diaphragm front and back end, and the user next water receiving can not receive the water of high concentration TDS.

When water is not made at the water purifier for a period of time, replace the former water before the RO membrane, prevent that this thick water before the RO membrane from passing the RO membrane and permeating the pure water end, avoid appearing the higher condition of first cup water TDS, improve user experience, and the thick water before the RO membrane can enter into leading composite filter's the end of intaking, thereby it mixes with the water at outside water source to get into the water in the elastic water bag outside, when making water next time, by the bad utilization of circulation, this kind of structure, when avoiding the water receiving of user next time can not receive the water of high concentration TDS, still can not produce waste water extravagant, the utilization efficiency of water resource has been promoted.

The present disclosure provides a water purifier, including: one end of the water inlet pipeline is connected with the water inlet end of the preposed composite filter element, and the other end of the water inlet pipeline is connected with an external water source and used for providing raw water to be purified for the water purifier; leading composite filter element the inside integrated water drive jar, water drive jar contains: the water purifier comprises an elastic water bag, a pure water cavity formed by coating the inner wall of the elastic water bag and used for storing pure water, and an external water cavity formed between the outer wall of the elastic water bag and the shell of the front composite filter element and used for injecting an external water source; one end of the water purification pipeline is connected with the water outlet end of the preposed composite filter element, the other end of the water purification pipeline is connected with the water inlet end of the RO filter element, and a first electromagnetic valve and a booster pump are arranged on the water purification pipeline; one end of the elastic water bag water filling pipeline is connected with the pure water outlet of the RO filter element, and the other end of the elastic water bag water filling pipeline is connected with the water inlet and outlet of the pure water cavity; the water replenishing pipeline of the elastic water bag is provided with a first check valve, a second check valve and a high-pressure switch; one end of the water outlet pipeline is connected between the first check valve and the second check valve, and the other end of the water outlet pipeline is a water outlet of the water purifier; one end of the pure water bubble membrane pipeline is connected with a water inlet and a water outlet of the pure water cavity, and the other end of the pure water bubble membrane pipeline is connected with a water inlet end of the RO filter element; the pure water bubble film pipeline is provided with a second electromagnetic valve and a third check valve; one end of the waste water pipeline is a waste water interface of the water purifier, and the other end of the waste water pipeline is communicated with a waste water outlet of the RO filter element; a third electromagnetic valve and a waste water valve are arranged on the waste water pipeline; one end of the return pipeline is connected with a wastewater outlet of the RO filter element, and the other end of the return pipeline is connected with a water inlet end of the preposed composite filter element; the return line is provided with a fourth solenoid valve and a fourth check valve, wherein, the water pressure in the outside water cavity is greater than the water pressure in the pure water cavity, extrudees elastic water bag 21 through the pressure of outside water source in the outside water cavity to extrude the pure water in the pure water cavity through the mouth of a river of going out in pure water cavity, and flow into in the membrane filter core, replace the dense water of membrane filter core dense water side, dense water flows to the inlet end of leading composite filter core in order to get into outside water cavity through the return line. Furthermore, when the pure water is subjected to membrane soaking, the pressure of the water in the elastic water bag is reduced to normal pressure, the elastic water bag is extruded by the pressure of an external water source, the pure water in the pure water cavity in the elastic water bag is extruded outwards, and the pure water enters the water inlet end of the RO filter element through the second electromagnetic valve and the third check valve. At this moment, because the water outlet of the water purifier and the wastewater interface of the water purifier are closed, wastewater in front of the RO membrane can be gradually extruded by the entering pure water and enters the water inlet end of the front composite filter element through the fourth electromagnetic valve and the fourth check valve, so that the wastewater enters the outer side of the elastic water bag to be mixed with water of an external water source. Like this, the water purifier is after shutting down for a long time, and the user next water receiving can not go out the condition emergence that has high concentration TDS, and the water purifier when implementing pure water bubble membrane procedure, can not produce waste water waste basically, promotes whole water resource utilization efficiency greatly.

In one embodiment, as shown in fig. 3, the water inlet line 10 is connected to the water mains and is provided with a pressure reducing valve 11.

Illustratively, the pressure reducing valve 11 is used to stabilize the water pressure of the tap water, so that the pressure of the tap water flowing from the water inlet pipeline 10 to the pre-composite filter element 20 is constant, thereby avoiding the phenomenon that the water pressure of the tap water is too high to affect the operation of the water drive tank integrated in the pre-composite filter element 20.

In one embodiment, as shown in fig. 4, a first TDS sensor 33 is disposed between the water outlet end of the pre-composite filter element 20 and the first solenoid valve 31.

The water purifier can determine the working state of the pre-composite filter element 20 according to the detection result of the first TDS sensor 33.

In one embodiment, as shown in fig. 5, further includes: a flow meter 61;

one end of the flow meter 61 is connected between the first check valve 51 and the second check valve 52, and the other end of the flow meter 61 is connected to the water outlet of the water purifier.

For example, the water purifier may obtain a target flow rate set by a user through a human-computer interface in advance, and during operation, the water flow may be controlled according to a detection result of the flow meter 61 and the target flow rate, so that the water flow output by the pure water pipeline is the same as the target flow rate.

In one embodiment, as shown in FIG. 6, a second TDS sensor 62 is also disposed between the flow meter 61 and the water outlet of the water purifier.

For example, the water purifier can determine the operating state of the RO filter cartridge 40 according to the detection result of the second TDS sensor 62, so as to remind the user to replace the RO filter cartridge 40 in time.

In one embodiment, as shown in fig. 7, a first TDS sensor 33 is disposed between the water outlet end of the pre-composite filter element 20 and the first solenoid valve 31; and a second TDS sensor 62 is also provided between the flow meter 61 and the water outlet of the water purifier.

For example, the water purifier can determine the operating state of the RO filter cartridge 40 according to the detection results of the first TDS sensor 33 and the second TDS sensor 62, and remind the user to replace the filter cartridge when the detection results of the first TDS sensor 33 and the second TDS sensor 62 are not very different.

In this disclosure, at the integrated water drive jar storage pure water of leading filter core of water purifier, start pure water bubble membrane procedure when the product is out of work for a long time, the high concentration waste water replacement behind the pure water that the jar was stored with the water drive jar membrane is fallen, and the high concentration waste water drainage that comes out will replace simultaneously drives a jar external water cavity, does not produce waste water when realizing the bubble membrane, promotes machine water efficiency.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A water purifier, characterized by comprising:

one end of the water purification pipeline is connected with the water outlet end of the preposed composite filter element, the other end of the water purification pipeline is connected with the water inlet end of the reverse osmosis RO filter element, and a first electromagnetic valve and a booster pump are arranged on the water purification pipeline;

one end of the return pipeline is connected with the wastewater outlet of the RO filter element, and the other end of the return pipeline is connected with the water inlet end of the preposed composite filter element; the backflow pipeline is provided with a fourth electromagnetic valve and a fourth check valve, wherein the water pressure in the external water cavity is larger than the water pressure in the pure water cavity, the elastic water bag is extruded by the pressure of an external water source in the external water cavity, so that the pure water in the pure water cavity is extruded out through the water inlet and outlet of the pure water cavity and flows into the RO filter element, the concentrated water on the concentrated water side of the RO filter element is replaced, and the concentrated water flows to the water inlet end of the front composite filter element through the backflow pipeline to enter the external water cavity.

2. The water purifier of claim 1, wherein the second check valve is a pressure relief valve;

the forward direction of the first check valve is the direction from the pure water outlet of the RO filter element to the water outlet of the water purifier;

3. The water purifier of claim 1, wherein the forward direction of the third check valve is a direction from the plain water chamber to the water inlet end of the RO filter element.

4. The water purifier of claim 1, wherein the forward direction of the fourth check valve is a direction from the wastewater outlet of the RO filter element to the water inlet end of the pre-composite filter element.

5. The water purifier according to claim 1, wherein the water inlet line is connected to a tap water line and is provided with a pressure reducing valve.

6. The water purifier of claim 1, wherein a first TDS sensor is disposed between the water outlet end of the pre-composite filter element and the first solenoid valve.

7. The water purifier according to claim 1, further comprising: a flow meter;

8. The water purifier of claim 7 further including a second TDS sensor disposed between the flow meter and the water outlet of the water purifier.

9. The water purifier of claim 1, wherein the other end of the pure water bubble membrane pipeline is connected with the water inlet end of the RO filter element through an additional pump.