CN114409110A

CN114409110A - Water purification system

Info

Publication number: CN114409110A
Application number: CN202210011377.1A
Authority: CN
Inventors: 柯映充; 孙天厚; 郑跃东
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-04-29

Abstract

The invention relates to the technical field of domestic water purification, and provides a water purification system, comprising: a waste water pipeline; a water inlet pipeline, a return inlet is formed between the inlet and the outlet of the water inlet pipeline; A return outlet is formed between the outlets; the main filter element assembly is constructed with a raw water inlet, a pure water outlet and a waste water outlet. ; The return pipeline is connected to the return inlet and the return outlet; the first valve is installed on the water inlet pipeline; the second valve is installed on the return pipeline. After the water purification system is on standby for a period of time, the return line is turned on, and the old water at the pure water end of the main filter element can be replaced, so as to avoid the increase of impurity concentration at the pure water end under the action of osmosis. Replaced with low-concentration water to avoid fouling and blockage at the waste water end, and improve the service life of the filter element.

Description

Water purification system

Technical Field

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

Background

With the pursuit of quality of life, the quality of drinking water is attracting much attention. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer. Tap water has higher solubility solid, and reverse osmosis filter element group spare can be under the effect of booster pump, and with the bulk ion of former aquatic stop in front of reverse osmosis membrane, and make the solubility solid of the water through reverse osmosis membrane accord with the standard of straight drinking water. In the related art, after a water purification system is in standby for a period of time, the total dissolved solid concentration at the pure water end of the filter element can be gradually increased, and peculiar smell, bacteria breeding and scaling blockage phenomena can exist after the water purification system is kept stand for a long time.

Disclosure of Invention

The present invention has been made to solve at least one of the problems occurring in the related art. Therefore, the invention provides the water purification system, the return pipeline can clean the pure water end and the waste water end of the main filter element assembly, the phenomena of stale water and scale formation in the pipeline are avoided, the quality of drinking water is improved, and the service life of the filter element is prolonged.

According to the embodiment of the invention, the water purification system comprises:

a waste water line;

a backflow inlet is formed between an inlet and an outlet of the water inlet pipeline;

a backflow outlet is formed between the inlet and the outlet of the water outlet pipeline;

the water inlet pipeline is communicated with the raw water inlet, the inlet of the water outlet pipeline is communicated with the pure water outlet, and the waste water pipeline is communicated with the waste water outlet;

the return pipeline is communicated with the return inlet and the return outlet;

the first valve is arranged on the water inlet pipeline;

a second valve mounted on the return line.

According to the water purification system provided by the embodiment of the invention, after the water purification system is in standby for a period of time, the return pipeline is conducted, the water inlet pipeline injects running water into the water purification system, so that water at the pure water end of the main filter element assembly can be replaced, the phenomenon that the concentration of total dissolved solids is increased under the action of osmosis of the water at the pure water end is avoided, the growth of microorganisms such as bacteria is avoided, high-concentration wastewater at the waste water end of the main filter element assembly can be replaced by low-concentration water, the phenomena that the waste water end is scaled and blocked under the high-concentration wastewater are avoided, and the service life of the main filter element assembly is prolonged.

According to an embodiment of the present invention, further comprising:

and the booster pump is arranged on the water inlet pipeline and is positioned between the reflux inlet and the raw water inlet.

According to an embodiment of the present invention, further comprising:

and the check valve is arranged on the return pipeline.

According to an embodiment of the present invention, further comprising:

leading filter element group spare is installed on the water intake pipe, leading filter element group spare is suitable for right liquid in the water intake pipe carries out prefilter.

According to an embodiment of the present invention, further comprising:

and the rear filter element assembly is arranged on the water outlet pipeline and is positioned at the upstream of the backflow outlet.

According to one embodiment of the invention, the front filter element assembly and the rear filter element assembly form a composite filter element assembly.

According to one embodiment of the invention, the main filter element assembly comprises:

the RO filter element is provided with a first raw water inlet, a first pure water outlet and a first wastewater outlet, the first raw water inlet is communicated with the outlet of the booster pump, the first pure water outlet is communicated with the inlet of the water outlet pipeline, and the first wastewater outlet is communicated with the wastewater pipeline;

the NF filter element is provided with a second raw water inlet, a second pure water outlet and a second wastewater outlet, the second raw water inlet is communicated with the outlet of the booster pump, the second pure water outlet is communicated with the inlet of the water outlet pipeline, and the second wastewater outlet is communicated with the wastewater pipeline;

and the regulating valve is arranged between the second pure water outlet and the inlet of the water outlet pipeline and is suitable for regulating the proportion of liquid at the outlet of the booster pump flowing through the RO filter element and the NF filter element.

According to an embodiment of the present invention, further comprising:

the first drinking water branch is communicated with the outlet of the water outlet pipeline;

the second drinking water branch is communicated with the outlet of the water outlet pipeline;

a third valve installed on the first drinking water branch;

and the pressure valve is arranged on the water outlet pipeline and is positioned at the upstream of the backflow outlet.

According to an embodiment of the present invention, further comprising:

the domestic water pipeline is communicated with a pipeline between the preposed filter element component and the backflow inlet;

and the fourth valve is arranged on the domestic water pipeline.

According to an embodiment of the present invention, further comprising:

a first detection member mounted on the water inlet conduit downstream of the pre-filter element assembly;

and the second detection part is arranged on the water outlet pipeline and is positioned at the downstream of the rear filter element component.

According to an embodiment of the invention, the first valve, the second valve and the regulating valve are all electrically operated valves.

According to an embodiment of the present invention, further comprising:

a controller, the controller with first valve the second valve governing valve and booster pump signal connection, the controller is used for controlling based on predetermineeing the standby time length first valve with the second valve is opened and is controlled the booster pump starts, and based on predetermine the standby time length control the governing valve switches on first time length, and first time length back disconnection second time length, and the second time length back closure the second valve.

One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

the water purification system provided by the embodiment of the invention comprises a water inlet pipeline, a waste water pipeline, a water outlet pipeline, a return pipeline, a main filter element component, a first valve and a second valve. The main filter element assembly is provided with a raw water inlet, a pure water outlet and a waste water outlet, the raw water inlet receives raw water from a water inlet pipeline, the main filter element assembly filters the raw water to form pure water and waste water, the pure water is discharged along a water outlet pipeline for a user, and the waste water is discharged along a waste water pipeline. A backflow inlet is formed between the inlet and the outlet of the water inlet pipeline, a backflow outlet is formed between the inlet and the outlet of the water outlet pipeline, and a backflow pipeline is arranged between the backflow inlet and the backflow outlet. The water inlet pipeline is provided with a first valve, and the return pipeline is provided with a second valve for controlling the on-off of the corresponding pipeline. After water purification system standby a period, the return line switches on, water inlet line injects running water in to water purification system, can replace the water of main filter element group spare pure water end, the water of avoiding the pure water end the phenomenon that total dissolved solid concentration increases appears under the osmosis, avoid breeding microorganisms such as bacterium, the high concentration waste water replacement that can also be with main filter element group spare waste water end is the water of low concentration, avoid the waste water end to appear phenomenons such as scale deposit jam under high concentration waste water, the life of main filter element group spare has been promoted.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

Fig. 1 is a schematic structural diagram of a water purification system provided by an embodiment of the invention;

FIG. 2 is a schematic view of a reflux process of a water purification system provided by an embodiment of the present invention;

fig. 3 is a schematic diagram of a first drinking water branch outlet of the water purification system provided by the embodiment of the invention;

fig. 4 is a schematic water outlet diagram of a second drinking water branch of the water purification system provided by the embodiment of the invention;

FIG. 5 is a schematic view of a domestic water outlet of the water purification system provided by the embodiment of the invention;

fig. 6 is test data of a water purification system according to an embodiment of the present invention and a conventional water purification system.

Description of the drawings:

100. a water inlet pipeline; 102. a water outlet pipeline; 104. a waste water line; 106. a first drinking water branch; 108. a second drinking water branch; 110. a booster pump;

120. a primary filter element assembly; 122. an RO filter element; 124. an NF filter element; 126. adjusting a valve;

130. a return line;

140. a first valve; 142. a second valve; 144. a one-way valve; 146. a third valve; 148. a pressure valve;

150. a composite filter element assembly;

160. a domestic water pipeline; 162. a fourth valve;

170. a flow meter; 172. a first detection member; 174. a second detection member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the related art, when the water purification system produces water, pure water flows out along the water outlet pipeline, waste water is discharged along the waste water pipeline, and liquid in the pipeline is in a flowing state and has no influence of old water. When the water purification system is in a standby state, salt at a concentrated water end can permeate into a pure water end due to the forward osmosis principle of the reverse osmosis filter element, so that the conductivity of the pure water end is increased, stale water can be formed in a pipeline when the standby time is longer, and the stale water can bring adverse effects to the use of a user and the service life of the filter element. A return pipeline is arranged in the water purification system, and the pure water with high conductivity flows back to the front end of the reverse osmosis filter element for secondary filtration, so that the influence of old water can be avoided.

According to an embodiment of the present invention, a water purification system includes a water inlet pipe 100, a water outlet pipe 102, a waste water pipe 104, a main filter element assembly 120, a return pipe 130, a first valve 140, and a second valve 142.

Referring to fig. 1 to 6, solid black arrows indicate the flow of raw water such as tap water or domestic water, dashed black arrows indicate the flow of wastewater, and dashed gray arrows indicate the flow of pure water.

The inlet of the water inlet pipe 100 is connected to an external water source, such as a tap water pipe, a water storage tank, etc., and can provide a sufficient amount of raw water for the water purification system. The first valve 140 is disposed on the water inlet pipe 100 to control the connection and disconnection of the water inlet pipe 100.

The main filter element assembly 120 is constructed with a raw water inlet, a pure water outlet and a waste water outlet, and is internally provided with a reverse osmosis filter element and the like, so that raw water containing impurities can be filtered, and particulate matters, dissolved salts and the like in the raw water can be removed.

The water inlet line 100 is connected to a raw water inlet, and the raw water is filtered by the main filter element assembly 120 to form pure water and wastewater. The inlet of the water outlet pipe 102 is connected to the pure water outlet of the main filter element assembly 120, and pure water flows out along the water outlet pipe 102 for users to use. The waste water line 104 is connected to the waste water outlet and allows the discharge of waste water having a relatively high total dissolved solids concentration formed during filtration.

The pure water at the outlet of the water outlet pipeline 102 can be directly used, or can be used after subsequent treatment, and is treated according to the selection of a user.

In the water production process of the conventional water purification system, the water inlet pipeline 100 is connected to external tap water, and the tap water can be introduced into the raw water inlet of the main filter element assembly 120. The pure water outlet of the main filter element assembly 120 forms filtered pure water to be discharged along the water outlet pipeline 102, the waste water outlet forms high-concentration waste water generated during filtering, and the high-concentration waste water is discharged along the waste water pipeline 104.

It should be noted that, the end of the filter element inside the main filter element assembly 120 close to the raw water inlet is a raw water end, the end close to the pure water outlet is a pure water end, and the end close to the waste water outlet is a waste water end.

When stopping system water, water purification system is in standby state, and partial pure water stops in the pure water end of main filter element group spare 120, and partial waste water stops in the waste water end of main filter element group spare 120, because the inside flow that does not have the water of water purification system, the quality of water that pure water end and waste water end can change.

At the pure water end, due to the existence of osmosis, the total dissolved solid concentration at the pure water end is gradually increased, and the total dissolved solid concentrations at the raw water end and the pure water end tend to be balanced to form old water with higher total dissolved solid concentration. When the water purification system is turned on again, the first cup of water in the water outlet pipeline 102 is cloudy and cannot be drunk. High concentration water is also prone to develop bacteria and other microorganisms, which may produce odors that affect the use of the user.

At the waste water end of main filter element group spare 120, because there is not running water to flow, the solid that dissolves in the high concentration waste water can be at waste water end incrustation, and then blocks up the waste water end of main filter element group spare 120, has increased the pressure when filtering, causes main filter element group spare 120 life's loss.

According to the water purification system provided by the embodiment of the invention, a backflow inlet is formed between the inlet and the outlet of the water inlet pipeline 100, a backflow outlet is formed between the inlet and the outlet of the water outlet pipeline 102, the backflow outlet and the backflow inlet are communicated through the backflow pipeline 130, and the backflow pipeline 130 is provided with the second valve 142.

It can be understood that the return line 130 can make the water inside the water purification system flow when in standby, and can replace the old water at the pure water end and the waste water end, thereby avoiding the water body deterioration and scaling.

After the water purification system is in standby for a period of time, the first valve 140 and the second valve 142 are opened, the raw water inlet receives external tap water, and the tap water forms pure water and wastewater after being filtered by the main filter element assembly 120, so that the pure water staying at the original pure water end and the wastewater staying at the original wastewater end can be replaced. The return line 130 is connected, and the pure water staying in the water outlet line 102 can be filtered again through the main filter element assembly 120, so that the phenomenon of concentration increase of the pure water in the water outlet line 102 is avoided, and clean drinking water can be provided for users at any time.

At the waste water end of main filter element group spare 120, because pure water does not contain impurity basically in return line 130, the waste water impurity concentration that produces during the backward flow is lower, and the high concentration waste water of waste water end is replaced by the pure water of low concentration, can avoid waste water end to appear the scale deposit phenomenon, has promoted the life of filter element group spare.

In some embodiments, the water purification system further comprises a booster pump 110, the booster pump 110 being mounted on the water inlet line 100 between the return inlet and the raw water inlet.

It can be understood that the micro-porous structure is formed in the main filter element assembly 120, so that particles in raw water can be filtered, and the raw water has a large filtering resistance when flowing. Under the action of the pressure of tap water, the water in the main filter element assembly 120 flows slowly, the filtering efficiency is low, and the flux is small. After the booster pump 110 is installed on the water inlet pipeline 100, the water pressure entering the main filter element assembly 120 is higher, the filtration flux of the water purification system is larger, and the requirement of larger drinking water can be met.

In some embodiments, the water purification system further includes a check valve 144, the check valve 144 being mounted on the return line 130.

It can be understood that, when the water purification system performs the replacement of old water in the pipe, the inlet of the booster pump 110 may receive the tap water from the water inlet pipe 100 or the old water from the return pipe 130, and after the one-way valve 144 is disposed on the return pipe 130, the old water in the return pipe 130 may flow to the raw water inlet, thereby promoting the replacement of the liquid at the pure water end and the waste water end, and helping to eliminate the old water in the pipe. When the return line 130 is disposed between the water inlet line 100 and the water outlet line 102, the check valve 144 can prevent raw water in the water inlet line 100 from directly flowing into the outlet of the water outlet line 102, so as to ensure that raw water cannot flow back into the first drinking water branch 106 and the second drinking water branch 108.

In some embodiments, the water purification system further includes a pre-filter assembly mounted on the water inlet pipe 100 to primarily filter the liquid in the water inlet pipe 100.

It can be understood that the tap water has a rough treatment process, contains more impurities and more particles, and cannot reach the standard of direct drinking. Directly inputing the raw water import with the running water and filtering, can lead to main filter element group spare 120's filtration pressure great, main filter element group spare 120's life shortens, has promoted user's use cost.

Running water is handled in advance through leading filter element group spare before getting into main filter element group spare 120, gets rid of the large granule impurity that the aquatic contains, can reduce main filter element group spare 120's filtration pressure, is favorable to promoting main filter element group spare 120's life.

In some embodiments, the water purification system further comprises a post-filter cartridge assembly mounted on the outlet conduit 102.

It can be understood that the post-filter element assembly can be a carbon rod or other filter structure, the post-filter element assembly receives pure water from the main filter element assembly 120, and the taste can be significantly improved by the pure water filtered by the post-filter element assembly.

It should be noted that the rear filter element assembly is located at the upstream of the backflow outlet, and when the water purification system performs backflow cleaning in the pipeline, old water at the water outlet of the rear filter element assembly can be cleaned and replaced together, so that the old water in the pipeline is avoided.

The closer the return outlet is located to the outlet of the water outlet line 102, the lower the possibility of standing water remaining in the water purification system, and the lower the chance of standing water contact when the user is reusing the water purification system, so the return outlet is located at the outlet of the water outlet line 102.

Under the condition that water purification system includes leading filter element group spare, main filter element group spare 120 and rearmounted filter element group spare, water purification system forms tertiary filtration system, has effectively promoted the quality of water of drinking water.

In some embodiments, the pre-filter element assembly and the post-filter element assembly are integrated together to form the composite filter element assembly 150.

It will be appreciated that the composite filter element assembly 150 integrates the front filter element assembly and the rear filter element assembly together, which may make the water purification system simpler in structure. The composite filter element assembly 150 and the main filter element assembly 120 are arranged in parallel, which is helpful for reducing the volume of the water purification system, forming an ultrathin structure and facilitating the installation and use of users.

In some embodiments, main cartridge assembly 120 includes RO cartridge 122, NF cartridge 124, and regulator valve 126.

The RO filter element 122 is configured with a first raw water inlet, a first pure water outlet and a first wastewater outlet, the first raw water inlet is communicated with the inlet of the booster pump 110, the first pure water outlet is communicated with the inlet of the water outlet pipeline 102, and the first wastewater outlet is communicated with the wastewater pipeline 104. The NF filter element 124 is configured with a second raw water inlet, a second pure water outlet and a second wastewater outlet, the second raw water inlet is communicated with the outlet of the booster pump 110, the second pure water outlet is communicated with the inlet of the water outlet pipeline 102, and the second wastewater outlet is communicated with the wastewater pipeline 104. A regulating valve 126 is installed between the second pure water outlet and the inlet of the water outlet line 102, and is adapted to regulate the ratio of the liquid flowing through the RO filter cartridge 122 and the NF filter cartridge 124 at the outlet of the booster pump 110.

It can be understood that the RO filter cartridge 122 is more elaborate and has a higher salt rejection, the NF filter cartridge 124 has a lower salt rejection, and the RO filter cartridge 122 and the NF filter cartridge 124 are connected in parallel, and both can work independently or simultaneously, and can meet different filtering requirements.

In the case that the main filter element assembly 120 includes the RO filter element 122 and the NF filter element 124, the pure water ends of the RO filter element 122 and the NF filter element 124 are respectively cleaned and replaced with old water, and the respective cleaning can be achieved by controlling the opening and closing of the regulating valve 126.

In some embodiments, the main filter element assembly 120 includes a plurality of sub-filter element assemblies, and the plurality of sub-filter element assemblies are arranged in parallel, which can effectively improve the filtering flux of the main filter element assembly 120. Meanwhile, the size of the sub-filter element component is small, and an ultrathin structure can be formed.

In some embodiments, the water purification system may supply water to a faucet or to an in-line machine, the water purification system including a first drinking water branch 106 and a second drinking water branch 108.

The first drinking water branch 106 and the second drinking water branch 108 are both connected to the outlet of the water outlet pipeline 102, a third valve 146 is installed on the first drinking water branch 106, and the third valve 146 can control the on-off of the first drinking water branch 106. The outlet pipe 102 is provided with a pressure valve 148, and the pressure valve 148 is automatically opened when the downstream water pressure is reduced, i.e. when the water demand exists, the pressure valve 148 automatically conducts the outlet pipe 102.

In the case that a return outlet is formed on the water outlet pipe 102, the pressure valve 148 is installed upstream of the return outlet, and the pressure valve 148 can control the on/off of the water outlet pipe 102 when the water purification system performs in-pipe cleaning.

It will be appreciated that when the third valve 146 is opened, the tap is discharging water, the pressure of the water in the first drinking water branch 106 decreases, and the pressure valve 148 is opened when the pressure decreases.

When the second drinking water branch 108 is connected to the pipeline machine, the pipeline machine is opened, the water pressure in the second drinking water branch 108 is reduced, and the pressure valve 148 is turned on when sensing the pressure reduction.

It should be noted that the first valve 140, the second valve 142, the third valve 146, the pressure valve 148 and the regulating valve 126 may be electric valves, the electric valves are connected to the control device by signals, and the electric valves are linked to each other to realize the functions of preparing drinking water and cleaning pipelines.

In some embodiments, the water purification system further includes a domestic water line 160 and a fourth valve 162, and the fourth valve 162 is installed on the domestic water line 160 and can control the on/off of the domestic water line 160.

It can be understood that as the living standard increases, the requirements of users for water for washing mouth and rice and vegetables increase. The pipeline between the front filter element component and the backflow inlet is communicated with a domestic water pipeline 160, and the domestic water after primary filtration can be provided for users. The domestic water contains less impurities, which is beneficial to the health of users.

In some embodiments, the water purification system further includes a first detection component 172 and a second detection component 174. A first sensing member 172 is mounted on the inlet line 100 downstream of the pre-filter assembly. A second sensing member 174 is mounted on the outlet conduit 102 downstream of the post-filter cartridge assembly.

It is understood that the first and second detecting

parts

172 and 174 may be TDS probes, the first detecting part 172 is used to detect a TDS value of the raw water, and the second detecting part 174 is used to detect a TDS value in the water pipe 102. The water purification system can determine whether to perform pipeline backflow cleaning based on the TDS values detected by the first detection component 172 and the second detection component 174, and intelligently adjust the duration and the water amount of the pipe backflow cleaning, so that the pipe can be prevented from being aged, and the phenomenon of scaling and blockage at the waste water end can be avoided.

The water purification system provided by the embodiment of the invention further comprises a controller, wherein the first valve 140, the second valve 142, the third valve 146, the fourth valve 162, the regulating valve 126, the pressure valve 148 and the like are all electrically operated valves, and the electrically operated valves are all in signal connection with the controller. The first valve 140, the second valve 142, the third valve 146, the fourth valve 162, the regulating valve 126 and the pressure valve 148 can be linked under the action of the controller, so that the water production and the in-pipe cleaning of the water purification system can be intelligently controlled.

In some embodiments, the third valve 146 is opened to allow the faucet to discharge water, and the first valve 140 and the third valve 146 are opened simultaneously to provide sufficient tap water for the water purification system.

In some embodiments, the pipeline machine is opened, the second drinking water branch 108 is conducted, and the first valve 140 and the pressure valve 148 are opened synchronously, so as to provide sufficient tap water for the water purification system.

The water purification system is in a standby state after stopping water production, and when the standby time is longer, the impurity concentration of the pure water in the water outlet pipeline 102 is increased. Therefore, the water purification system can preset the standby time, and after the preset standby time, the water purification system starts the in-pipe backflow cleaning work.

After a preset standby time period, the controller controls the first and

second valves

140 and 142 to be opened, and controls the booster pump 110 to supply water into the main filter element assembly 120. After the return line 130 is conducted, the return cleaning operation of the line can be realized.

In the case where the main cartridge assembly 120 includes the RO cartridge 122 and the NF cartridge 124, the pure water side of the RO cartridge 122 and the NF cartridge 124 need to be backwardly cleaned, respectively.

The controller turns the damper valve 126 on for a first period of time to allow the stale water from the clean water side of the NF cartridge 124 to drain, and then turns the damper valve 126 off for a second period of time. When the regulating valve 126 is opened, the stale water at the pure water side of the RO cartridge 122 can be drained, and the second period of time is longer than the first period of time due to the finer RO cartridge 122. Through the state of switching governing valve 126, can wash RO filter core 122 and NF filter core 124 one by one, can wash the pure water end of RO filter core 122 and NF filter core 124 clean respectively, and then effectively promoted the life of main filter element group 120.

After the pipeline backflow cleaning is finished, the second valve 142 is disconnected, the backflow pipeline 130 is in a blocking state, the water purification system can return to a water production state or a standby state, and whether the first valve 140 and the booster pump 110 are closed or not is determined according to the state of the water purification system.

In some cases, after the line purge is completed, the outlet of the outlet line 102 has no water demand, and the pressure valve 148 is closed, which directly closes the first valve 140 and the booster pump 110.

In some cases, after the cleaning of the water outlet pipe 102 is finished, the water demand exists at the outlet of the water outlet pipe 102, and the pressure valve 148 is in the conducting state, so that the first valve 140 and the booster pump 110 are kept operating to provide drinking water to the outlet of the water outlet pipe 102.

The following description will be made with reference to the following embodiments:

when the water purification system enters a standby state for 20 minutes, the water purification system automatically starts a backflow program and starts timing. The first valve 140, the booster pump 110, the second valve 142 and other components are opened, the regulating valve 126 is completely opened in the first 15 seconds and closed in the last 45 seconds, and the second valve 142 is closed immediately when the backflow time reaches 60 seconds. At this time, if the pressure valve 148 is in the closed state, the booster pump 110 and the first valve 140 are sequentially closed, and the water purification system enters the standby state. If the pressure valve 148 is in the conducting state, indicating that the user is taking water during backflow or the line machine is replenishing water, the first valve 140 is kept in the open state, and the booster pump 110 continues to operate. When the user finishes taking water or the pipeline machine is full of water, the pressure valve 148 is disconnected, the booster pump 110 and the first valve 140 are sequentially closed by the water purification system, and the water purification system enters a standby state.

When the water purification system enters a standby state for 24 hours, the water purification system automatically starts a backflow program and starts timing. The first valve 140, the booster pump 110, the second valve 142 and other components are opened, the regulating valve 126 is completely opened in the first 15 seconds and closed in the last 45 seconds, and the second valve 142 is closed immediately when the backflow time reaches 60 seconds. At this time, if the pressure valve 148 is in the closed state, the booster pump 110 and the first valve 140 are sequentially closed, and the water purification system enters the standby state. If the pressure valve 148 is in the conducting state, indicating that the user is taking water during backflow or the line machine is replenishing water, the first valve 140 is kept in the open state, and the booster pump 110 continues to operate. When the user finishes taking water or the pipeline machine is full of water, the pressure valve 148 is disconnected, the booster pump 110 and the first valve 140 are sequentially closed by the water purification system, and the water purification system enters a standby state.

Use the rate of recovery to be 60% to 70% water purification system as an example, the TDS concentration of RO filter core 122 waste water end generally is 3 times of raw water TDS, can reduce the concentration of RO filter core 122 waste water end to near with raw water TDS through above return line, can greatly reduced RO filter core 122 surface scale's risk, effectively prolonged the life of filter core.

According to an embodiment of the present invention, a water purification system is provided, which includes a water inlet line 100, a waste water line 104, a water outlet line 102, a return line 130, a main filter element assembly 120, a first valve 140, and a second valve 142. The main filter element assembly 120 is configured with a raw water inlet that receives raw water from the water inlet line 100, a pure water outlet that discharges pure water along the water outlet line 102 for human use and a waste water outlet that discharges along the waste water line 104 after the raw water is filtered by the main filter element assembly 120. A return inlet is formed between the inlet and the outlet of the inlet pipe 100, a return outlet is formed between the inlet and the outlet of the outlet pipe 102, and a return pipe 130 is disposed between the return inlet and the return outlet. The water inlet pipeline 100 is provided with a first valve 140, and the return pipeline 130 is provided with a second valve 142 for controlling the on-off of the corresponding pipeline. After water purification system standby a period, return line 130 switches on, water inlet pipe 100 injects running water into water purification system, can replace the water of main filter element group 120 pure water end, the water of avoiding the pure water end the phenomenon that total dissolved solid content increases appears under the osmosis, avoid breeding microorganisms such as bacterium, can also replace the high concentration waste water of main filter element group 120 waste water end for the water of low concentration, avoid the waste water end to appear phenomenons such as scale deposit jam under the high concentration waste water, the life of main filter element group 120 has been promoted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. a water purification system, is characterized in that, comprises:

waste water pipeline;

a water inlet pipeline, a return inlet is formed between the inlet and the outlet of the water inlet pipeline;

a water outlet pipe, a return outlet is formed between the inlet and the outlet of the water outlet pipe;

The main filter element assembly is constructed with a raw water inlet, a pure water outlet and a waste water outlet, the water inlet pipeline is connected to the raw water inlet, the inlet of the water outlet pipeline is connected to the pure water outlet, and the waste water pipeline is connected to the the waste water outlet;

a return line, connected to the return inlet and the return outlet;

a first valve, installed on the water inlet pipeline;

The second valve is installed on the return line.

2. water purification system according to claim 1, is characterized in that, also comprises:

A booster pump is installed on the water inlet pipeline and located between the return inlet and the raw water inlet.

3. water purification system according to claim 2, is characterized in that, also comprises:

A one-way valve is installed on the return line.

4. water purification system according to claim 2, is characterized in that, also comprises:

The pre-filter element assembly is installed on the water inlet pipeline, and the pre-filter element assembly is suitable for preliminarily filtering the liquid in the water inlet pipeline.

5. water purification system according to claim 4, is characterized in that, also comprises:

The rear filter element assembly is installed on the water outlet pipeline, and the rear filter element assembly is located upstream of the return outlet;

The front filter element assembly and the rear filter element assembly constitute a composite filter element assembly.

6. The water purification system according to any one of claims 2 to 5, wherein the main filter element assembly comprises:

The RO filter element is constructed with a first raw water inlet, a first pure water outlet and a first waste water outlet, the first raw water inlet is connected to the outlet of the booster pump, and the first pure water outlet is connected to the water outlet pipe the inlet of the road, the first waste water outlet is connected to the waste water pipeline;

The NF filter element is constructed with a second raw water inlet, a second pure water outlet and a second waste water outlet, the second raw water inlet is connected to the outlet of the booster pump, and the second pure water outlet is connected to the water outlet pipe the inlet of the road, the second waste water outlet is connected to the waste water pipeline;

A regulating valve, installed between the second pure water outlet and the inlet of the water outlet pipeline, is suitable for regulating the ratio of the liquid at the outlet of the booster pump flowing through the RO filter element and the NF filter element.

7. The water purification system according to claim 6, further comprising:

a first drinking water branch, connected to the outlet of the water outlet pipeline;

The second drinking water branch is connected to the outlet of the water outlet pipeline;

a third valve, installed on the first drinking water branch;

A pressure valve is installed on the water outlet pipeline and is located upstream of the return outlet.

8. The water purification system of claim 4, further comprising:

The domestic water pipeline is connected to the pipeline between the pre-filter element assembly and the return inlet;

The fourth valve is installed on the domestic water pipeline.

9. The water purification system of claim 5, further comprising:

a first detection component, installed on the water inlet pipeline and located downstream of the pre-filter element assembly;

A second detection component is installed on the water outlet pipeline and is located downstream of the rear filter element assembly.

10 . The water purification system according to claim 6 , wherein the first valve, the second valve and the regulating valve are all electric valves. 11 .

11. The water purification system of claim 10, further comprising:

a controller, the controller is signally connected with the first valve, the second valve, the regulating valve and the booster pump, and the controller is configured to control the first valve and the booster pump based on a preset standby time period The second valve is opened and the booster pump is controlled to start, and based on the preset standby time period, the regulating valve is controlled to be turned on for a first period of time, and is turned off for a second period of time after the first period of time, and is turned off after the first period of time. The second valve is closed after the second time period.