CN117446913A

CN117446913A - Water purification system with cleaning function

Info

Publication number: CN117446913A
Application number: CN202210816154.2A
Authority: CN
Inventors: 刘果; 刘小菡
Original assignee: Nanjing Hanshu Environmental Protection Equipment Co ltd
Current assignee: Nanjing Hanshu Environmental Protection Equipment Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2024-01-26

Abstract

The invention discloses a water purification system with a cleaning function, which comprises: a first filter device comprising a concentrate side and a clean side, the clean side having a raw water inlet and a concentrate outlet, the clean side having a clean water outlet; a concentrate discharge regulating valve directly or indirectly connected to a concentrate outlet of the first filtering means, the concentrate discharge regulating valve having at least a discharge port; a container for temporarily storing purified water, having an air tap in communication with the interior, the container being positioned higher than the first filtering means; a first purge line connected between a clean water outlet of the first filter device and the vessel; an air pump connected to the air tap by an air pipe; when cleaning is needed: the purified water in the container is reversely fed into the purified water side of the first filtering device by means of gravitational potential energy and/or the air pump forces the purified water in the container to be fed into the purified water side of the first filtering device by pumping air into the container.

Description

Water purification system with cleaning function

Technical Field

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

Background

The filter membrane (or called filter device) is affected by the quality of the filtered raw water, the service time, the idle time and other factors, solute particles and ions can be attached to the water purifying side and the concentrated water side, so that the filtering efficiency and the quality of the purified water are affected, and the problem of 'head cup water' is caused. For example, when the filter membrane is deactivated for a longer period of time, water is produced again, and solute particles and ions on the concentrate side permeate to the water purification side, so that "head cup water" flowing out from the water outlet end (such as a water receiving tap) is bitter and unqualified. For this purpose, the filter member needs to be cleaned.

In the prior art, the filter membrane piece is cleaned in the following manner:

after stopping the water production, the filter device is supplied with purified water by a booster pump in the water purification system in the same path as the water production process so as to clean the filter membrane.

However, the above-mentioned cleaning method for the filter membrane in the prior art has the following drawbacks:

the booster pump supplies the purified water into the filter member along the water-making path at a relatively high pressure, and the purified water is actually washed out of the filter member, and the membrane is washed out of the filter member by the purified water entering the filter member along the water-making path, so that the washing effect obtained by the washing method in the prior art is not good.

Disclosure of Invention

Aiming at the technical problems in the prior art, the embodiment of the invention provides a water purifying system with a cleaning function.

In order to solve the technical problems, the technical scheme adopted by the embodiment of the invention is as follows:

a water purification system with cleaning function, comprising:

a first filter device having a purified water side and a concentrate side formed therein, the concentrate side of the first filter device having a raw water inlet and a concentrate outlet, the purified water side of the first filter device having a purified water outlet;

a concentrate discharge regulating valve directly or indirectly connected to a concentrate outlet of the first filtering means, the concentrate discharge regulating valve having at least a discharge port;

a container having a nipple in communication with the interior, the container being positioned higher than the first filter device;

a first purge line connected between a clean water outlet of the first filter device and the vessel;

an air pump connected to the air tap by an air pipe; wherein:

the container is used for temporarily storing purified water from the purified water side of the first filtering device;

when cleaning is needed:

the purified water in the container is reversely supplied to the water purifying side of the first filtering device by means of gravitational potential energy

And/or

The air pump forces purified water in the container to be supplied to the purified water side of the first filter device by pumping air into the container.

Preferably, a water outlet is also formed on the container, and is connected to the water taking end through a water outlet pipeline.

Preferably, the water purification system with the cleaning function further comprises a direct-drinking pipeline and a liquid valve component; wherein:

the direct drinking pipeline is connected between the purified water outlet of the first filtering device and the water taking end;

the liquid valve component is used for selectively enabling the purified water outlet of the first filtering device to be communicated with the direct-drinking pipeline or the first cleaning pipeline.

Preferably, the water purifying system with the cleaning function further comprises a second filtering device, wherein a water purifying side and a concentrated water side are formed in the second filtering device, the concentrated water side of the second filtering device is provided with a raw water inlet and a concentrated water outlet, and the water purifying side of the second filtering device is provided with a water purifying outlet; wherein:

the concentrated water outlet of the first filtering device is connected to the raw water inlet of the second filtering device through an intermediate pipeline, and the concentrated water discharge regulating valve is connected to the concentrated water outlet of the second filtering device through a concentrated water outlet pipeline;

the clean water outlet of the second filter device is connected to the vessel by a second purge line.

Preferably, the liquid valve component is a two-position three-way electromagnetic directional valve.

Preferably, a booster pump is installed on a tap water pipeline from the raw water outlet end and connected to the raw water inlet of the first filtering device.

Preferably, the running water pipeline is provided with a water mixing tank, the water mixing tank is positioned at the upstream of the booster pump, and the concentrated water discharge regulating valve is also provided with a return port; wherein:

the return port of the concentrated water discharge valve is connected to the water mixing tank through a return pipeline.

Preferably, a bypass communicated with the atmosphere is led out from the air pipe, and an air valve is arranged on the bypass, when the air pump supplies air to the air pipe, the air valve is closed, and when the air pump is not started, the air valve is in an open state.

Preferably, a liquid filter element is arranged on the tap water pipeline, and the liquid filter element is positioned at the upstream of the booster pump.

Preferably, the air pipe is provided with an air filter element, and the air filter element is arranged on a pipe section between the bypass and the air tap of the container.

Preferably, the water inlet of the container connected with the first cleaning pipeline and the water inlet of the container connected with the second cleaning pipeline are communicated into the inner cavity of the container in a tangential direction.

Compared with the prior art, the water purification system with the cleaning function has the beneficial effects that:

1. the potential energy and the osmotic pressure are utilized to enable the purified water to soak the filter membrane in the filter device, and the air pump is utilized to press the purified water to perform back flushing on the filter membrane, so that a more cleaning effect can be obtained.

2. By connecting the washing container into the water intake path, the washing device always has flowing purified water, which can effectively avoid deterioration of the inside of the washing container (such as the cavity wall).

3. The filtering device provided by the chinese patent 202210760690.5 of the applicant's prior application is selected as the filtering device of the present application, and particularly, a more cleaning effect can be obtained, because the flat clean water flow channel and the dense water flow channel (all clean water flow channels form the clean water side of the present application and all dense water flow channels form the dense water side of the present application) are defined by the flat filter membrane in the filtering element of the filtering device, which is beneficial to fully soaking and flushing the filter membrane, and is more beneficial to flushing solute particles attached to the membrane of the filter membrane by back flushing. The filtering device provided by the patent is selected, so that the purifying system provided by the embodiment has better effects of water preparation and cleaning convenience.

4. The soaking and back flushing can enable the concentrated water on the concentrated water side of the filtering device to approach 100ppm, and the cleaning process is stopped when the concentrated water approaches 100ppm, so that the purified water prepared by the filtering device after the water is prepared again can not only have the problem of head cup water (the problem of head cup water is that the concentration of the concentrated water side is too high and the concentration of the purified water generated at first is too high because the concentration of the concentrated water side is too high and the problem of too low because the concentration of the purified water is too low, and the aim that the solute concentration of the purified water can be set according to requirements can be realized. In addition, in the cleaning process, the purified water flows from the purified water side to the concentrated water side so that solute particles can be more easily separated from the membrane and mixed into the concentrated water, and thus the detected concentration of the concentrated water can more truly reflect the cleaning condition of the filter membrane, for example, the detected concentration of the concentrated water flowing out of the concentrated water outlet is 100ppm, and the concentration of the concentrated water in the concentrated water side is also basically 100ppm.

5. Purified water prepared by the two filtering devices is mixed in the cleaning container and then is conveyed to the water taking end B, so that a user can obtain purified water with more stable water quality.

6. At the initial stage of water preparation, purified water prepared by the first filtering device is directly conveyed to the water taking end B, and purified water prepared by the second filtering device is conveyed to the cleaning container, so that a user can conveniently take the purified water from the water taking end B in time, and two paths of purified water are mixed.

7. The first filter device of the first structure of the filter device provided by the chinese patent No. 202210760690.5 of the applicant's prior application is referred to as the first filter device of the present invention, and the second filter device of the second structure is referred to as the second filter device of the present invention. Since the first structure of the filter device has the advantage of being suitable for outputting a smooth water quality, and the second filter device has the advantage of being suitable for filtering water with a poor water quality (higher concentration), this matches the position and function of the two filter devices in the purification system in the present embodiment. Therefore, the filtering device with two structures provided by the patent applied by the applicant in advance is selected, so that the water purifying system provided by the embodiment has better filtering efficiency and filtering effect, can convey purified water with more stable water quality, and has more anti-pollution capability.

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 invention, as claimed.

An overview of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.

Drawings

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the inventive embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.

Fig. 1 is a schematic diagram of a water purification system according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a water purification system according to embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of a water purification system according to embodiment 3 of the present invention.

Fig. 4 is a schematic diagram of an air valve in an open state according to the present invention.

Fig. 5 is a schematic diagram of the air valve provided by the invention in a closed state.

Reference numerals:

10-a first filtration device; 11-a concentrate side; 111-raw water inlet; 112-a concentrated water outlet; 1121-a concentrate outlet pipe; 1122-an intermediate line; 12-a water purification side; 121-a purified water outlet; 20-cleaning a container; 21-a water inlet; 22-air tap; 23-water outlet; 24-water inlet; 30-an air pump; 31-trachea; 32-by-pass; 33-an air valve; 331-a valve hole; 332-valve core; 333-ventilation grille; 334-a spring; 335-valve sleeve; 34-an air filter element; 40-a liquid valve member; 50-a concentrated water discharge regulating valve; 51-a discharge port; 52-a reflux port; 53-return line; 60-tap water line; 61-a booster pump; 62-liquid filter element; 63-a water mixing tank; 611-a first purge line; 612-a second purge line; 613-direct drinking line; 70-a second filtration device; 71-a concentrate side; 711 raw water inlet; 712-a concentrate outlet; 7121-concentrated water outlet line; 72-water purification side; 721-clean water outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components thereof have been omitted.

Example 1

As shown in fig. 1, the present embodiment discloses a water purification system with a cleaning function, comprising: the first filtering device 10, the washing container 20, the concentrate discharge regulating valve 50, the air pump 30, and related piping.

The first filtering means 10 is built therein with a filtering element made of a filter membrane for filtering raw water from the direction of the raw water outlet end a, the filtering element inside the housing of the first filtering means 10 defining a concentrate side 11 and a purified water side 12, the concentrate side 11 having a raw water inlet 111 and a concentrate outlet 112, the purified water side 12 having a purified water outlet 121.

The raw water outlet end a is connected to the raw water inlet 111 of the first filtering device 10 through the tap water line 60, and a first washing line 611 is led out from the purified water outlet 121 of the first filtering device 10, and the first washing line 611 is connected to the washing container 20.

The cleaning container 20 is provided with an air tap 22 and a water outlet 23 which are communicated with the internal cavity of the cleaning container 20, the water outlet 23 of the cleaning container 20 is connected to a water taking end B through a water outlet pipeline, an air pump 30 is connected to the air tap 22 through an air pipe 31, a bypass 32 is led out from the air pipe 31, an air valve 33 is arranged on the bypass 32, and the air valve 33 has the following characteristics: the air valve 33 is closed when the air pump 30 is operated to pump air into the cleaning container 20 through the air pipe 31, and the air valve 33 is opened to allow the air pipe 31 to communicate with the atmosphere when the air pump 30 is in a stopped state.

The inlet of the concentrate discharge regulating valve 50 is connected to the concentrate outlet 112 of the first filter device 10 through a concentrate outlet pipe 1121, the concentrate discharge regulating valve 50 having a discharge port 51, the discharge port 51 being connected to the concentrate discharge end C through a concentrate discharge pipe or directly as the concentrate discharge end C.

In some preferred versions of this embodiment, the self-cleaning water outlet 121 also leads to a straight drink line 613, the distal end of the straight drink line 613 also being connected to the water intake end B, such that the straight drink line 613 is disposed in parallel with the cleaning vessel 20. A liquid valve component 40 is arranged between the purified water outlet 121 of the first filtering device 10 and the straight drinking pipeline 613 and the cleaning pipeline, a two-position three-way electromagnetic directional valve is selected as the liquid valve component 40, the purified water outlet 121 of the first filtering device 10 is connected to the inlet of the liquid valve component 40, and the proximal end of the cleaning pipeline and the proximal end of the straight drinking pipeline 613 are respectively connected to the two outlets of the liquid valve component 40.

In some preferred embodiments of the present embodiment, a booster pump 61 is provided on the tap water line 60, and the booster pump 61 is used to be activated to supply the raw water of sufficient pressure and flow rate to the first filtering device 10 when the raw water pressure and flow rate supplied from the tap water line 60 are insufficient, for maintaining the produced water (the booster pump 61 also supplies the raw water of sufficient pressure and flow rate to the second filtering device 70 in embodiments 2 and 3 below). A liquid filter element 62 is further installed in the tap water line 60, the liquid filter element 62 is located upstream of the booster pump 61, and the liquid filter element 62 performs prefiltering on raw water to be fed into the first filtering device 10, and is particularly suitable for being installed in the tap water line 60 for conveying raw water with poor water quality.

In some preferred embodiments of the present invention, a gas filter 34 is mounted on the gas pipe 31, the gas filter 34 being located at a pipe section between the bypass 32 and the gas tap 22, the gas filter 34 being configured to filter the gas to be introduced into the cleaning vessel 20 to ensure that the gas introduced into the cleaning vessel 20 is a clean gas.

The following describes the operation of the water purification system disclosed in embodiment 1 including the above preferred embodiment, including the water-making and water-taking process and the washing process.

The water preparation and taking process comprises the following steps:

the raw water in the tap water pipeline 60 from the raw water outlet end a is first subjected to pre-filtration through the liquid filter element 62 (if the quality of the raw water is good, the tap water pipeline 60 may not be provided with the liquid filter element 62), then is pressurized through the booster pump 61 to meet the water making condition of the first filtering device 10 (if the pressure and flow rate of the raw water in the tap water pipeline 60 are enough, the booster pump 61 may not be provided on the tap water pipeline 60), the raw water pressurized through the booster pump 61 enters the filtering element through the raw water inlet 111 of the concentrate side 11, and the filter membrane filters the raw water in the filtering element, so that purified water is generated on the raw water side, and the raw water is concentrated into concentrate.

On the one hand, the produced concentrate flows out from the concentrate outlet on the concentrate side and through the concentrate outlet line 1121 to the concentrate discharge regulating valve 50 having a discharge port 51 that can be regulated, the concentrate passing through the discharge port 51 regulated to meet a certain discharge requirement.

On the other hand, the generated purified water flows out from the purified water outlet 121 of the purified water side 12, and the purified water flowing out from the purified water outlet 121 is delivered to the water intake end B through which the user can obtain the purified water. In the present embodiment, purified water flowing out from the purified water outlet 121 can be delivered to the water intake end B in two ways.

The first way is: the purified water flowing out from the purified water outlet 121 is directly sent to the water intake end B through the direct-drinking pipe 613 by controlling the operation of the liquid valve member 40 so that the purified water outlet 121 communicates with the direct-drinking pipe 613.

The second way is: when the purified water flowing out from the purified water outlet 121 is first supplied to the washing container 20 through the washing pipe by controlling the operation of the liquid valve member 40 so that the purified water outlet 121 communicates with the washing container 20, and the water outlet 23 is provided in the area of the washing container 20 near the top, the purified water fills the washing container 20 and is supplied to the water intake end B through the water outlet pipe. The air tap 23 is provided with a switch valve or a ball cock is arranged at the inner air port of the cleaning container 20 communicated with the air tap 23, so that the air tap is blocked by the switch valve or the ball cock after the cleaning container 20 is filled with water, and purified water is prevented from flowing out from the air tap.

Cleaning process

And after stopping water production, the discharge port of the concentrated water discharge regulating valve is completely opened, and the concentrated water in the concentrated water side is discharged in time. The filter membrane in the filter element in the first filter device 10 is cleaned within a preset time after stopping taking water, which can be set by a designer, a user, for example, the first filter device 10 is cleaned immediately after stopping taking water, or the first filter device 10 is cleaned before taking water for the next time (this timing is more advantageous in avoiding the generation of "head cup water").

It is necessary to have purified water in the cleaning vessel 20 prior to cleaning. If the purified water is supplied in the first mode during the water preparation and taking process, the water preparation state of the first filter device 10 is maintained before the first filter device 10 is cleaned, the liquid valve member 40 is controlled to communicate the purified water outlet 121 with the direct drinking pipe 613, and the generated purified water is injected into the cleaning container 20. If the second mode is adopted in the water-taking process, the cleaning container 20 is already filled with the purified water generated in the water-taking process before cleaning, and no purified water is required to be injected into the cleaning container 20.

After the cleaning vessel 20 is provided with the purified water, the supply of the raw water to the first filtering device 10 is stopped by the tap water line 60, and the discharge port 51 of the concentrated water discharge regulating valve 50 is fully opened.

When the control liquid valve member 40 is operated to shut off the purified water outlet 121 from the direct drinking pipe 613 and to connect the purified water outlet 121 to the first cleaning pipe 611, the purified water in the cleaning vessel 20 flows reversely into the purified water side 12 of the first filter device 10 through the first cleaning pipe 611 and the purified water outlet 121 by means of gravitational potential energy, the purified water entering the purified water side 12 dilutes the concentrate on the concentrate side 11 by the filter membrane, and the diluted concentrate is discharged from the discharge port 51 of the concentrate discharge regulating valve 50 through the concentrate outlet pipe 1121. In the process of making the purified water enter the first filtering device 10 by means of gravitational potential energy, the environment of the filtering membrane is a low-pressure environment, the flow rate of the water passing through the filtering membrane is not large, and in fact, the filtering membrane is in a soaked state. During the soaking process, the concentrate on the concentrate side 11 is diluted, and the concentrate on the concentrate side 11 is more easily detected and controlled.

In the soaking process, particularly in the initial stage of soaking, due to the concentration difference between the water purifying side 12 and the water concentrating side 11 on both sides of the membrane of the filter membrane, osmotic pressure is provided, and the osmotic pressure also has a certain actuation effect on the purified water from the water purifying side 12 to the water concentrating side 11, so that in the soaking process, the gravitational potential energy of the purified water and the osmotic pressure between the water purifying side 12 and the water concentrating side 11 act together to promote the purified water to flow from the water purifying side to the water concentrating side.

If the filter membrane is not easily soaked to meet the cleaning requirement, the air pump 30 is started, the air pump 30 allows the air to enter the cleaning container 20 through the air pipe 31, the air is purified through the air filter element 34, the air pump 30 pumps the air into the cleaning container 20 to press the purified water in the cleaning container 20 to enter the water purifying side 12 of the first filter device 10 at a certain pressure and a certain flow rate, the pressure of the purified water entering the water purifying side 12 needs to be lower than the rated working pressure of the filter membrane element in the first filter device 10, then the purified water enters the concentrate side 11 through the filter membrane at a certain flow rate, and then the purified water is discharged from the discharge port 51 of the concentrate discharge regulating valve 50. The process of pumping gas into the washing vessel 20 using the gas pump 30 such that the purified water in the washing vessel 20 passes through the first filtering means 10 at a certain pressure and flow rate is effectively a back washing process of the filtering membrane.

In addition, if the gravitational potential energy and osmotic pressure of the purified water are too low to flow from the purified water side 12 to the concentrate side 11 during the soaking process, which results in too long soaking time, the air pump 30 is controlled to pump air into the cleaning container during the soaking process to increase the flow of the purified water to the concentrate side by increasing the pressure of the purified water.

In addition, in the cleaning process, the soaking process and the rinsing process can be alternately performed.

The path of the filter membrane cleaning in this embodiment is at least different from the path of the filter membrane cleaning in the prior art as follows:

1. in the prior art, purified water is supplied to the concentrated water side of a filtering device, and the membrane of a filter membrane is washed on the concentrated water side (the washing path is the same as the water making path); in this embodiment, purified water is supplied to the purified water side 12, passes through the membrane of the filter membrane, and then enters the concentrate side 11. While more solute particles are attached to the side of the membrane that is on the concentrate side, in the prior art, as purified water enters the concentrate side, the solute particles are washed out mainly in the direction of the clean side, which is detrimental to the separation of the solute particles from the membrane. In this embodiment, however, the purified water enters the clean side 12, and thus washes the solute particles mainly toward the concentrate side 11 (i.e., back-washing), thereby making it easier to separate the solute particles from the membrane.

2. In the prior art, the filter membrane is cleaned by supplying purified water into the filter device through a booster pump at a certain flow rate and pressure, and in fact, the cleaning process is only flushing; in this embodiment, the filter membrane is cleaned by a combination of soaking and rinsing.

Therefore, the potential energy and the osmotic pressure are utilized to soak the filter membrane in the first filtering device 10 by the purified water and the air pump 30 is utilized to press the purified water to back flush the filter membrane, so that the method is favorable for obtaining better cleaning effect compared with the cleaning mode in the prior art.

In the water taking and preparing process, the purified water flowing out from the purified water outlet 121 is conveyed to the water taking end B after passing through the cleaning container 20, and then the cleaning container 20 is used as a conveying pipeline to participate in the water taking process, so that the cleaning container 20 also has the purified water passing through in the non-cleaning process, and the inside deterioration of the cleaning container can be effectively prevented.

In this embodiment, the stop timing of the cleaning process depends on the requirement of the filter membrane cleaning effect, for example, when the detected concentration of the concentrated water flowing out of the concentrated water outlet 112 meets the requirement of the cleaning effect, the water injection of the cleaning vessel into the filter device is stopped.

The advantage of this embodiment is that:

1. the potential energy and the osmotic pressure are utilized to enable the purified water to soak the filter membrane in the first filter device 10, and the air pump 30 is utilized to press the purified water to perform back flushing on the filter membrane, so that a more cleaning effect can be obtained.

2. By connecting the washing container 20 into the water intake path, the washing apparatus is always provided with flowing purified water, which can effectively prevent deterioration of the inside (e.g., cavity wall) of the washing container 20.

3. The filtering device provided by the chinese patent 202210760690.5 of the applicant's prior application is selected as the filtering device of the present application, and particularly, a more cleaning effect can be obtained, because the flat clean water flow channel and the dense water flow channel (all clean water flow channels form the clean water side 12 of the present application and all dense water flow channels form the dense water side 11 of the present application) are defined by the flat filter membrane in the filtering element of the filtering device, which is beneficial to fully soaking and flushing the filter membrane, and is more beneficial to flushing solute particles attached to the membrane of the filter membrane by back flushing. The filtering device provided by the patent is selected, so that the purifying system provided by the embodiment has better effects of water preparation and cleaning convenience.

4. The use of soaking and back flushing can bring the concentrate on the concentrate side 11 of the filter device to approximately 100ppm and stop the cleaning process when approaching 100ppm, which makes the purified water prepared after the filter device is made again not only free from the "head cup" problem (the occurrence of the "head cup" problem is that too high concentration of concentrate 11 permeates to the water purification side 12 to cause too high concentration of purified water produced initially), but also free from the occurrence of too low concentration of purified water, and can achieve the purpose that the solute concentration of purified water can be set as required. In addition, during the cleaning process, the purified water flows from the clean water side 12 to the concentrate side 11, so that solute particles can be more easily separated from the membrane and mixed into the concentrate, and thus the detected concentration of the concentrate can more truly reflect the cleaning of the filter membrane, for example, the detected concentration of the concentrate flowing out of the concentrate outlet 112 is 100ppm, and the concentration of the concentrate in the concentrate side 11 is also substantially 100ppm. .

Example 2

As shown in fig. 2, the water purification system provided in this embodiment 2 is different from that in embodiment 1 in that: in the present embodiment, a water mixing tank 63 is provided on a tap water pipe 60, and a concentrated water discharge regulating valve 50 has a return port 52, and the return port 52 is connected to the water mixing tank 63 through a return pipe 53.

The water mixing device provided by the chinese patent 202121316131.2 filed by the applicant can be selected as the water mixing tank 63 of the present embodiment; the concentrate discharge regulating valve 50 in this embodiment may be selected from the concentrate proportioning valve provided in the chinese patent No. 202111553800.2 filed by the applicant.

The working procedure of the water purifying device provided in this embodiment is different from that of embodiment 1 in that:

in the water preparation and intake process, after the concentrated water in the concentrated water side 11 flows to the concentrated water discharge regulating valve 50, one part is discharged through the discharge port 51, and the other part flows out from the return port 52 and flows to the water mixing tank 63 through the return line 53, and the part of the concentrated water and the raw water from the raw water outlet end A are mixed in the water mixing tank 63 and enter the filtering device again to participate in water preparation.

During the cleaning process, the return port 52 of the concentrate discharge regulator 50 is closed during the soaking and rinsing of the first filter device 10.

The advantage of this embodiment is that:

1. the same advantages as in example 1 are obtained.

2. By adding the water mixing tank 63 and adding the return port 52 to the concentrated water discharge regulating valve 50, a part of the concentrated water is re-participated in the water production, so that the discharge of the concentrated water can be reduced, and the water quality of the purified water can be regulated.

Example 3

As shown in fig. 3, in the present embodiment, a second filter device 70 is added to embodiment 3, the second filter device 70 is connected in series with the first filter device 10, and a purified water outlet 721 of the purified water side 72 of the second filter device 70 is connected to the cleaning vessel 20. Specifically, the concentrate outlet 112 of the concentrate side 11 of the first filter device 10 is connected to the raw water inlet 711 of the concentrate side 71 of the second filter device 70 through the intermediate pipe 1122, the concentrate discharge regulating valve 50 is connected to the concentrate outlet 712 of the concentrate side 71 of the second filter device 70 through the concentrate outlet pipe 7121 instead of the concentrate outlet 112 of the concentrate side 11 of the first filter device 10, and the purified water outlet 721 of the purified water side 72 of the second filter device 70 is connected to the cleaning container 20 through the second cleaning pipe 612. Moreover, the water inlet 21 of the cleaning container 20 connected with the first cleaning pipeline 611 and the water inlet 24 of the cleaning container 20 connected with the second cleaning pipeline 612 are all penetrated into the inner cavity of the cleaning container 20 in a tangential direction, so that the two paths of purified water enter the cleaning container 20 to generate rotary operation, and the cavity wall of the cleaning container 20 is better cleaned, so that solute particles are prevented from adhering to the cavity wall of the cleaning container 20.

Next, the operation of the water purification system disclosed in embodiment 3, including the water production and water intake process and the washing process, will be described.

Water preparing process

Raw water in the tap water pipeline 60 from the raw water outlet end A firstly enters the concentrated water side 11 of the first filtering device 10 through the raw water inlet 111 of the first filtering device 10, the filtering element in the first filtering device 10 filters the raw water to enable the purified water to be generated on the purified water side 12 of the first filtering device 10, the raw water is filtered on the concentrated water side 11 of the first filtering device 10 to form concentrated water with concentration greater than that of the raw water, the concentrated water flows out of the concentrated water outlet 112 of the concentrated water side 11 in the first filtering device 10 and enters the concentrated water side 71 of the second filtering device 70 through the raw water inlet 711 of the second filtering device 70, the concentrated water is secondarily filtered through the filtering element in the second filtering device 70 to enable the purified water to be generated on the purified water side 72 of the second filtering device 70, the concentrated water which is secondarily filtered on the concentrated water side 71 of the second filtering device 70 flows out through the concentrated water outlet 712 of the second filtering device 70, flows to the concentrated water discharge regulating valve 50 through the concentrated water outlet pipe 7121, the concentrated water discharge regulating valve 50 flows out of the two parts into the water discharge part through the water discharge part 52 and the water discharge part 52 to be mixed with the water discharge part to be mixed into the water return part through the water discharge part 52 and the water return part to be mixed into the water return part 51.

At the initial stage of taking water, the liquid valve member 40 is controlled such that the purified water outlet 121 of the first filtering means 10 communicates with the straight drinking pipe 613, which causes purified water in the purified water side 12 of the first filtering means 10 to flow out from the purified water outlet 121 of the first filtering means 10 to be directly delivered to the water taking end B through the straight drinking pipe 613, and at the same time, purified water in the purified water side 72 of the second filtering means 70 is supplied to the washing container 20 through the second washing pipe 612 for pre-priming the washing container 20.

After the cleaning device is filled with the purified water produced by the second filtering device 70, the liquid valve member 40 is controlled such that the purified water outlet 121 of the first filtering device 10 communicates with the first cleaning pipe 611, and thus the purified water in the purified water side 12 of the first filtering device 10 is also supplied into the cleaning container 20, mixed with the purified water from the second filtering device 70 in the cleaning container 20, and the mixed purified water flows from the water outlet 23 of the cleaning container 20 and is then supplied to the water intake end B for use.

Cleaning process

After a predetermined time after stopping taking water, the filter membranes in the filter elements in the first filter device 10 and the second filter device 70 are cleaned.

Before cleaning, the tap water line 60 is closed, the control liquid valve member 40 communicates the purified water outlet 121 of the first filter device 10 with the first cleaning line 611, the discharge port 51 of the concentrated water discharge regulating valve 50 is completely opened, and the return port 52 is closed.

In the initial stage of washing, the purified water in the washing vessel 20 enters the water purifying side 12 of the first filtering device 10 and the water purifying side 72 of the second filtering device 70 through the first washing pipe 611 and the second washing pipe 612 by means of gravitational potential energy and osmotic pressure, respectively, the purified water entering the water purifying sides 12,72 dilutes the concentrated water in the concentrated water sides 11,71 by the filter membrane, and the diluted concentrated water in the concentrated water side 11 of the first filtering device 10 enters the concentrated water side 71 of the second filtering device 70 through the intermediate pipe 1122, and is mixed with the diluted concentrated water in the concentrated water side 71 of the second filtering device 70 and then flows to the concentrated water discharge regulating valve 50 to be discharged. The action of this process is the same as that of the processes corresponding to embodiments 1 and 2, i.e., the soaking process of the filter elements of the first filter device 10 and the second filter device 70.

If the filter membrane is not easy to be soaked, the air pump 30 is started, the air pump 30 enables the air to enter the container through the air pipe 31, the air is purified through the air filter element 34, the air pump 30 pumps the air into the cleaning container 20 to press the purified water in the cleaning container 20 to enter the purified water side 12 of the first filter device 10 and the purified water side 72 of the second filter device 70 at a certain pressure and a certain flow rate, and the flow paths of the purified water and the concentrated water are the same as those of the purified water and the concentrated water in the soaking process, which are not repeated here. The procedure was the same as that of examples 1 and 2 for back flushing the filter membranes in the first filter device 10 and the second filter device 70.

The advantages in this embodiment are:

1. the same advantages as those of example 1 and example 2 are obtained.

2. The two filtering devices are used for preparing water, so that the requirement of large flux can be met.

3. Purified water prepared by the two filtering devices is mixed in the cleaning container 20 and then is conveyed to the water taking end B, so that a user can obtain purified water with more stable water quality.

4. At the initial stage of water preparation, purified water prepared by the first filtering device 10 is directly conveyed to the water taking end B, and purified water prepared by the second filtering device 70 is conveyed to the cleaning container 20, so that a user can conveniently take the purified water from the water taking end B in time, and two paths of purified water are prepared for mixing.

5. A first structure of the filter device provided in the chinese patent 202210760690.5 of the applicant's prior application is referred to as the first filter device 10 of the present invention, and a second structure of the filter device is referred to as the second filter device 70 of the present invention. Since the first structure of the filter device has an advantage of being suitable for outputting a smooth water quality, and the second filter device 70 has an advantage of being suitable for filtering water having a poor water quality (a high concentration), it is matched with the positions and functions of the two filter devices in the purification system in the present embodiment. Therefore, the filtering device with two structures provided by the patent applied by the applicant in advance is selected, so that the water purifying system provided by the embodiment has better filtering efficiency and filtering effect, can convey purified water with more stable water quality, and has more anti-pollution capability.

The cleaning vessel 20 in the water purification system provided in embodiments 1, 2, 3 is equipped with a liquid level sensor for detecting the amount of purified water entering into the cleaning vessel 20 and controlling the start and stop of the relevant components based on the amount of purified water injected.

For example, in embodiment 3, when the liquid level sensor detects that the second washing pipe 612 fills the washing container 20 with purified water, the liquid valve member 40 is controlled to operate so that the first washing pipe 611 communicates with the purified water outlet 121 of the first filtering device 10, and thus the purified water in the first filtering device 10 is also injected into the washing device through the first washing pipe 611.

For another example, in embodiments 1, 2, and 3, in the process of pumping the cleaning vessel 20 by the air pump 30 to press the purified water in the cleaning vessel 20 to back-flush the filtering apparatus, when the liquid level sensor detects that the purified water in the cleaning vessel 20 has fallen to a lower liquid level, the air pump 30 is controlled to stop pumping the cleaning vessel 20 so as to avoid pressing the air into the filtering apparatus.

The present invention also provides a gas valve 33 applied to the purification system of embodiments 1, 2, 3, as shown in fig. 4 and 5, the gas valve 33 includes a valve housing 335, a valve hole 331 formed in the valve housing 335, a valve body 332 for closing the valve hole 331, and a spring 334 for pushing the valve body 332 reversely in the direction of the valve hole 331, the valve body 332 is provided at the rear portion thereof with a ventilation grill 333, the rear portion of the valve housing 335 is connected to the gas pipe 31, and the valve hole 331 is directed to the atmosphere. As shown in fig. 4, when the air pump 30 in the water purification system is not activated, the spring 334 pushes the valve body 332 such that the valve hole 331 is in an opened state, which allows purified water to be injected into the washing container 20 or to flow from the washing container 20 to the filtering device. As shown in fig. 5, after the air pump 30 is started, the pressure of the air pumped by the air pump 30 pushes the valve body 332 to close the valve hole 331, so that the air supplied from the air pump 30 is introduced into the cleaning container 20 only.

Furthermore, although exemplary embodiments have been described in the present disclosure, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across), adaptations or alterations as would be appreciated by those in the art. Elements in the claims are to be construed broadly based on the language employed in the claims and are not limited to examples described in the present specification or during the practice of the present application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above detailed description, various features may be grouped together to streamline the invention. This is not to be interpreted as an intention that the disclosed features not being claimed are essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.

Claims

1. A water purification system having a cleaning function, comprising:

an air pump connected to the air tap by an air pipe; wherein:

when cleaning is needed:

And/or

2. The water purification system with washing function according to claim 1, wherein a water outlet is further formed on the container, and is connected to the water intake end from the water outlet through a water outlet pipe.

3. The water purification system with a washing function according to claim 1, further comprising a direct-drinking line and a liquid valve part; wherein:

4. The water purification system with a washing function according to claim 3, further comprising a second filter device having a water purification side and a concentrate side formed therein, the concentrate side of the second filter device having a raw water inlet and a concentrate outlet, the water purification side of the second filter device having a purified water outlet; wherein:

5. A water purification system with cleaning function according to claim 3, wherein the liquid valve member is a two-position three-way electromagnetic directional valve.

6. The water purification system with a washing function according to any one of claims 1 to 5, wherein a booster pump is installed on a tap water line from a raw water outlet end and connected to a raw water inlet of the first filtering device.

7. The water purification system with a cleaning function according to claim 6, wherein a water mixing tank is arranged on the tap water pipeline, the water mixing tank is positioned at the upstream of the booster pump, and the concentrated water discharge regulating valve is further provided with a return port; wherein:

8. The water purification system with a washing function according to claim 1, wherein a bypass connected to the atmosphere is led out from the air pipe, and an air valve is installed on the bypass, and is closed when the air pump supplies air to the air pipe, and is opened when the air pump is not started.

9. The water purification system with purge function of claim 7, wherein a liquid filter cartridge is installed on the tap water line, the liquid filter cartridge being located upstream of the booster pump.

10. The water purification system with purge function of claim 8, wherein the air pipe is provided with an air filter element interposed on a pipe section between the bypass and the air tap of the container.

11. The water purification system with washing function according to claim 4, wherein the water inlet of the container connected to the first washing pipe and the water inlet of the container connected to the second washing pipe are all penetrated into the inner cavity of the container in a tangential direction.