CN215855271U

CN215855271U - Water purification unit and waterway system thereof

Info

Publication number: CN215855271U
Application number: CN202022997537.3U
Authority: CN
Inventors: 田炼; 张艳鹤; 孟繁轲
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: 2020-12-10
Filing date: 2020-12-10
Publication date: 2022-02-18
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a water purifying device and a waterway system thereof, wherein the waterway system comprises: a raw water waterway; the membrane stack is provided with a water inlet waterway, a water outlet waterway and a return waterway, the water inlet waterway is communicated with the raw water waterway, the water outlet waterway is provided with a water outlet valve, the return waterway is communicated with the raw water waterway, and the return waterway is provided with a return valve, wherein when the water outlet valve is communicated and the return valve is closed, the membrane stack is subjected to waste discharge and cleaning; when the waste discharge cleaning reaches the preset condition, the water outlet valve is closed and the reflux valve is switched on, and the membrane stack is cleaned in a self-circulation mode. According to the water path system of the water purifying equipment, the self-circulation cleaning of the membrane stack can be realized by arranging the backflow water path, so that the water treatment capacity of the membrane stack is improved, and the service life of the membrane stack is prolonged; through set up the washing of wasting discharge before self-loopa washs, can further improve the cleaning performance of membrane heap, reduce out water peculiar smell to can provide the drinking water that quality of water is good for the user, user experience is good.

Description

Water purification unit and waterway system thereof

Technical Field

The utility model relates to the technical field of water purification, in particular to a water purification device and a waterway system thereof.

Background

Relatively serious inorganic pollution can appear in the long-term operation of electrodialysis membrane stack, and the existence of inorganic pollution can reduce membrane stack ion separation effect, makes the water treatment capacity of membrane stack reduce, and waterway system among the correlation technique lacks the cleaning function, leads to the water treatment capacity of membrane stack to reduce, and life shortens.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a waterway system of a water purifying apparatus, which can improve the cleaning effect of a membrane stack and reduce the odor of the effluent.

The utility model also provides a water purifying device.

According to a first aspect embodiment of the utility model, the waterway system of the water purifying apparatus comprises: a raw water waterway; the membrane stack is provided with a water inlet waterway, a water outlet waterway and a backflow waterway, the water inlet waterway is communicated with the raw water waterway, the water outlet waterway is provided with a water outlet valve, the backflow waterway is communicated with the raw water waterway, and the backflow waterway is provided with a backflow valve, wherein when the water outlet valve is communicated and the backflow valve is closed, the membrane stack is subjected to waste discharge and cleaning; when the waste discharge cleaning reaches a preset condition, the water outlet valve is closed, the reflux valve is conducted, and the membrane stack is cleaned in a self-circulation mode.

According to the water path system of the water purifying equipment, the self-circulation cleaning of the membrane stack can be realized by arranging the backflow water path, so that the water treatment capacity of the membrane stack is improved, and the service life of the membrane stack is prolonged; through set up the washing of wasting discharge before self-loopa washs, can further improve the cleaning performance of membrane heap, reduce out water peculiar smell to can provide the drinking water that quality of water is good for the user, user experience is good.

According to the waterway system of the water purifying equipment, the water outlet waterway comprises a fresh water waterway and a concentrated water waterway, the water outlet valve comprises a first water outlet valve and a second water outlet valve, the first water outlet valve is arranged in the fresh water waterway, the second water outlet valve is arranged in the concentrated water waterway, and when the first water outlet valve is conducted, the second water outlet valve is conducted and the reflux valve is closed, the membrane stack is subjected to waste discharge and cleaning; when the waste discharge cleaning reaches a preset condition, the first water outlet valve is closed, the second water outlet valve is closed, the reflux valve is switched on, and the membrane stack is subjected to self-circulation cleaning.

In some examples, the return waterway comprises: one end of the first backflow waterway is connected with the first backflow interface of the fresh water waterway, the other end of the first backflow waterway is connected with the raw water waterway, and the first backflow waterway is provided with a first backflow valve; one end of the second backflow water channel is connected with a second backflow interface of the concentrated water channel, the other end of the second backflow water channel is connected with the raw water channel, and the second backflow water channel is provided with a second backflow valve, wherein when the first water outlet valve is switched on, the second water outlet valve is switched on, the first backflow valve is closed, and the second backflow valve is closed, the membrane stack is subjected to waste discharge and cleaning; when the waste discharge cleaning reaches a preset condition, the first water outlet valve is closed, the second water outlet valve is closed, the first backflow valve is conducted, the second backflow valve is conducted, and the membrane stack is subjected to self-circulation cleaning.

In some examples, when the first outlet valve is closed, the second return valve is closed, the second outlet valve is opened, and the first return valve is opened, the membrane stack is cleaned by a fresh water waterway.

In some examples, the influent flow rate of the self-circulation wash is greater than the influent flow rate of the fresh water circuit wash, and/or the time of the self-circulation wash is greater than the time of the fresh water circuit wash.

In some examples, the first return port is located upstream of the first outlet valve and the second return port is located upstream of the second outlet valve.

In some examples, further comprising: the water inlet tank is arranged on the raw water waterway, the first backflow waterway is communicated with the water inlet tank, and the second backflow waterway is communicated with the water inlet tank.

In some examples, further comprising: the waste water tank is arranged on the concentrated water waterway, and the fresh water waterway is communicated with the waste water tank.

In some examples, when the membrane stack is subjected to waste cleaning, the liquid discharged from the concentrated water path and the fresh water path flows to the waste water tank, and the preset condition is that the waste water tank is filled with the liquid.

According to the water route system of water purification unit of the embodiment of this invention, still include: and the water pump is connected to the upstream of the membrane stack and is used for driving water to flow in each water channel of the water channel system.

According to the waterway system of the water purifying device provided by the embodiment of the utility model, the water outlet valve is an electromagnetic valve, and/or the reflux valve is an electromagnetic valve.

According to the water path system of the water purifying device, the membrane stack is an electrodialysis membrane stack.

In some examples, before the membrane stack is subjected to waste cleaning, the method further comprises: and adding an acid washing agent into the raw water channel, and carrying out acid washing on the membrane stack.

According to the water purifying equipment provided by the embodiment of the second aspect of the utility model, the water channel system of the water purifying equipment provided by the embodiment of the first aspect of the utility model is adopted, so that the cleaning effect of the membrane stack can be improved, the peculiar smell of the outlet water can be reduced, drinking water with good water quality can be provided for users, the user experience is good, the cleaning is convenient, and the service life of the water purifying equipment is long.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a waterway system according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method of cleaning a membrane stack according to one embodiment of the utility model;

fig. 3 is a flowchart of a cleaning method of a membrane stack according to another embodiment of the present invention.

Reference numerals:

the water circuit system (100) is provided with a water circuit,

a raw water path 10 for the raw water,

a membrane stack 20, a water inlet waterway 21, a fresh water waterway 22, a first return port 221, a concentrated water waterway 23, a second return port 231, a first return waterway 24, a second return waterway 25,

a first outlet valve 31, a second outlet valve 32, a first return valve 33, a second return valve 34,

a water inlet tank 40 and a waste water tank 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A waterway system 100 of a water purifying apparatus according to an embodiment of the present invention will be described with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a waterway system 100 of a water purifying apparatus according to an embodiment of the present invention includes: the membrane stack 20 is provided with a water inlet waterway 21, a water outlet waterway and a return waterway, wherein the water inlet waterway 21 is communicated with the raw water waterway 10, the water outlet waterway is provided with a water outlet valve, the return waterway is communicated with the raw water waterway 10, and the return waterway is provided with a return valve.

When the water outlet valve is switched on and the return valve is closed, the membrane stack 20 is subjected to waste discharge and cleaning; when the washing of wasting discharge reaches the preset condition, the outlet valve is closed and the return valve switches on, and membrane stack 20 carries out the self-loopa and washs, that is to say, through setting up the backward flow water route, can conveniently wash and wash membrane stack 20, improves membrane stack 20's water treatment capacity and life.

It is understood that, since the membrane stack 20 may have serious inorganic pollution in long-term operation, the presence of the inorganic pollution may reduce the ion separation effect of the membrane stack 20, and the water treatment capacity of the membrane stack 20 is reduced, and therefore, before the membrane stack 20 is subjected to waste cleaning, the method further includes: adding an acid washing agent into the raw water channel 10, and carrying out acid washing on the membrane stack 20, wherein in the acid washing process, washing water with the acid washing agent can circularly flow between the membrane stack 20 and the raw water channel 10 through a backflow water channel, so that the aim of removing inorganic pollutants in the membrane stack 20 is fulfilled. Wherein the acid washing agent may be citric acid.

Further, because the water after the citric acid is cleaned has a certain peculiar smell, and if the membrane stack 20 is directly cleaned in a circulating way, the final effluent water of the cleaning way still has a certain peculiar smell, therefore, the utility model leads the membrane stack 20 to firstly carry out waste discharge cleaning, discharges the citric acid water with higher concentration in the membrane stack 20 and then carries out self-circulation cleaning, can thoroughly solve the problem of the peculiar smell of the effluent water and improves the cleaning effect of the membrane stack 20.

According to the waterway system 100 of the water purifying apparatus of the embodiment of the present invention, by providing the backflow waterway, the self-circulation cleaning of the membrane stack 20 can be realized, the water treatment capacity of the membrane stack 20 is improved, and the service life of the membrane stack 20 is prolonged; through set up the washing of wasting discharge before the self-loopa washs, can further improve the cleaning performance of membrane stack 20, reduce out water peculiar smell to can provide the drinking water that quality of water is good for the user, user experience is good.

According to one embodiment of the utility model, the water outlet valve is an electromagnetic valve, the reflux valve can also be an electromagnetic valve, the electromagnetic valve has the advantages of simple structure, convenience in installation, safety in use, high control precision and good flexibility, and the accurate control of a water path can be realized.

According to an embodiment of the present invention, in order to ensure that the water flows circularly between the membrane stack 20 and the raw water waterway 10, a water pump is provided upstream of the membrane stack 20, and the water flows are driven by the water pump to flow in each waterway of the waterway system 100.

According to an embodiment of the present invention, the membrane stack 20 is an electrodialysis membrane stack 20, the electrodialysis method is adopted for the membrane stack 20, under the action of an external direct current electric field, anion and cation in the fluid are subjected to ion migration by utilizing the selective permeability of an ion exchange membrane to ions in the fluid, and the purpose of desalination or concentration is achieved by respectively passing through the anion exchange membrane and the cation exchange membrane, so that water quality with different concentrations can be provided for users, and the use requirements of the users are met.

According to one embodiment of the utility model, the membrane stack 20 generally comprises: the positive electrode plate, the negative electrode plate, anion exchange membrane and cation exchange membrane relative setting are between positive electrode plate and negative electrode plate, in addition, are equipped with the guide plate between positive electrode plate and anion exchange membrane, between anion exchange membrane and cation exchange membrane, between cation exchange membrane and the negative electrode plate, and the guide plate can play the effect of support, water conservancy diversion and sealing.

Under the normal condition of working at membrane stack 20, raw water route 10 carries the raw water of treating electrodialysis (purification) to membrane stack 20 through water inlet water route 21, under the direct current voltage effect, the anion in the raw water flows to the positive plate direction, the cation flows to the negative plate direction, thereby form fresh water room and dense water room in membrane stack 20, thereby fresh water route 22 and fresh water room intercommunication carry fresh water (the water that ion concentration is low) to the outside, thereby dense water route 23 and dense water room intercommunication externally discharge dense water (the water that ion concentration is high), wherein, the raw water can be bottled water or running water, also can be for the water after the first filtration.

According to one embodiment of the utility model, the effluent water path comprises a fresh water path 22 and a concentrated water path 23, the outlet valves comprise a first outlet valve 31 and a second outlet valve 32, the first outlet valve 31 is arranged on the fresh water path 22, the second outlet valve 32 is arranged on the concentrated water path 23, and when the first outlet valve 31 is conducted, the second outlet valve 32 is conducted and the return valve is closed, the membrane stack 20 is subjected to waste discharge cleaning; when the waste cleaning reaches a preset condition, the first water outlet valve 31 is closed, the second water outlet valve 32 is closed, the return valve is opened, and the membrane stack 20 performs self-circulation cleaning, wherein the preset condition can be preset time, preset water inlet and outlet amount and the like.

As shown in fig. 1, in some examples, the outlet waterway includes a fresh water waterway 22 and a concentrate waterway 23, and the return waterway includes: the membrane stack 20 is subjected to waste discharge cleaning when the first return water path 24 has a first return valve 33 and the second return water path 25 has a second return valve 34, the first outlet valve 31 is open, the second outlet valve 32 is open, the first return valve 33 is closed and the second return valve 34 is closed, and at this time, the water flow flowing out of the membrane stack 20 can be discharged through the fresh water path 22 and the concentrated water path 23, and can be discharged to the waste water tank 50 or directly discharged to the waste water tank 50.

Further, when the waste cleaning reaches the preset condition, the first outlet valve 31 is closed, the second outlet valve 32 is closed, the first return valve 33 is opened, the second return valve 34 is opened, and the membrane stack 20 performs self-circulation cleaning. That is, the water flowing out of the fresh water waterway 22 may be returned to the raw water waterway 10 through the first return waterway 24, and the water flowing out of the concentrated water waterway 23 may be returned to the raw water waterway 10 through the second return waterway 25. In other words, the water flow direction of the water path system 100 may sequentially flow through the raw water path 10, the inlet water path 21, the membrane stack 20, the first return water path 24 and the raw water path 10, and/or the water flow direction may sequentially flow through the raw water path 10, the inlet water path 21, the membrane stack 20, the second return water path 25 and the raw water path 10, and the first return water path 24 and the second return water path 25 realize the circulation flow of water between the membrane stack 20 and the raw water path 10, so as to perform self-circulation cleaning, thereby facilitating the cleaning and flushing of the membrane stack 20, and improving the water treatment capacity and the service life of the membrane stack 20.

In some examples, the first return interface 221 is located upstream of the first outlet valve 31, the second return interface 231 is located upstream of the second outlet valve 32, that is, the first return valve 33 controls the on/off of the first return water path 24, the second return valve 34 controls the on/off of the second return water path 25, the first outlet valve 31 controls the on/off of the fresh water path 22, and the second outlet valve 32 controls the on/off of the concentrated water path 23, so as to prevent the closing of the outlet valves from affecting the flow of water in the return water paths.

In some examples, when the first outlet valve 31 is closed, the second return valve 34 is closed, the second outlet valve 32 is open, and the first return valve 33 is open, the membrane stack 20 performs fresh water circuit cleaning, at this time, the water flowing out of the fresh water circuit 22 can flow back to the raw water circuit 10 through the first return circuit 24, the fresh water circuit 22 is circularly flushed, the water flowing out of the concentrated water circuit 23 can be directly discharged to the waste water tank 50 or the sewer, and when the concentrated water circuit 23 is discharged to the waste water tank 50, the cleaning can be stopped when the waste water tank 50 is full.

In some examples, the inflow rate of the self-circulation cleaning is greater than the inflow rate of the cleaning in the fresh water circuit, thereby effectively improving the cleaning effect of the fresh water circuit 22 and ensuring that the pickling cleaning solution is completely replaced by clean water. Alternatively, the self-circulation cleaning time is longer than the fresh water path cleaning time, which can also improve the cleaning effect of the fresh water path 22.

In one embodiment, the water flow from the recycle wash stage is 1000mL/min, the cycle time is 20 minutes, the secondary waste wash is 500mL/min, and the flush time is 2 minutes. Therefore, the cleaning effect of the membrane stack 20 is effectively improved, and the pickling cleaning liquid is completely replaced by clean water.

In some examples, after the membrane stack 20 is self-circulated, the fresh water circuit may be cleaned, and the first outlet valve 31 may be opened and the second outlet valve 32 may be opened, so that the water in the fresh water circuit 22 is directly discharged without circulation.

According to the waterway system 100 of the embodiment of the present invention, under different operation modes of the waterway system 100, the first outlet valve 31, the second outlet valve 32, the first return valve 33, and the second return valve 34 cooperatively control on/off conditions of different waterways, so as to meet requirements of different operation modes. Of course, it will be appreciated that the above is merely illustrative and that there is no limitation to having one valve for each waterway, and that two or more valves may be provided.

According to an embodiment of the present invention, the raw water path 10 is connected to a water inlet end of a municipal tap water pipe, a water inlet valve is disposed at an inlet end of the raw water path 10, and the raw water path 10 can be directly connected to the tap water faucet, that is, a water source of the water path system 100 is directly from the municipal tap water pipe, and under the condition that the water inlet valve is conducted, tap water enters the membrane stack 20 for electrodialysis under the hydraulic pressure of the municipal tap water. The water inlet valve can be in a normally open state, and is closed only in the self-circulation cleaning process inside the waterway system 100, so that water inside the waterway system 100 is prevented from flowing backwards into the municipal tap water pipe, and the municipal tap water is prevented from being polluted.

In some examples, the raw water path 10 is connected to a pickling agent administering device, and the pickling agent administering device is connected to the raw water path 10 through a bypass pipe, so that when the pickling agent needs to be administered to the raw water path 10, the pickling agent is introduced into the raw water path 10 through the bypass pipe, and in order to prevent the water path system 100 from leaking, the bypass pipe is further provided with a one-way conduction valve.

As shown in fig. 1, according to an embodiment of the present invention, the waterway system 100 further includes: the water inlet tank 40 is arranged on the raw water waterway 10, the first backflow waterway 24 is communicated with the water inlet tank 40, the second backflow waterway 25 is communicated with the water inlet tank 40, or the water inlet tank 40 is positioned between the first backflow waterway 24 and the raw water waterway 10, and the water inlet tank 40 is positioned between the second backflow waterway 25 and the raw water waterway 10, so that water in the water inlet tank 40 can circulate along the directions of the membrane stack 20 and the water return waterway, and self-circulation cleaning is realized.

Wherein, be equipped with the water pump between water tank 40 and membrane stack 20 intakes, under the water pump effect, carry the water source to membrane stack 20 through water tank 40 intakes, can wash membrane stack 20 through the water in the water tank 40 intakes repeatedly, water after washing can flow back to water tank 40 through first backward flow water route 24 and/or second backward flow water route 25 in, after finishing washing, the water in the water tank can be directly to discharging outward, change clean water, wash once more. In addition, the water inlet tank 40 can be connected with a municipal tap water pipe, tap water is pre-stored in the water inlet tank 40, is deposited and then enters the membrane stack 20, and the water in the water inlet tank 40 can also be added barreled water.

In some examples, the pickling agent may be injected into the inlet water tank 40 and after the inlet water tank 40 is sufficiently dissolved, the water pump is started to introduce the pickling agent water into the membrane stack 20 and return the pickling agent water to the inlet water tank 40 through the first and second

return water lines

24 and 25, and the pickling is repeated, thereby removing inorganic contamination inside the membrane stack 20.

According to one embodiment of the utility model, the concentrate waterway 23 can be directly connected to the sewer pipe, and the fresh water waterway 22 can also be connected to the sewer pipe, so that the membrane stack 20 can be directly discharged and cleaned, and the citric acid can be quickly washed out.

As shown in fig. 1, according to an embodiment of the present invention, the waterway system 100 further includes: the waste water tank 50, the waste water tank 50 sets up on dense water route 23, and fresh water route 22 can be linked together with waste water tank 50, from this when the washing of wasting discharge is washd with the fresh water route, can make water all arrange to waste water tank 50 in, in addition, the pickling washing liquid can be unified to be discharged to waste water tank 50 through dense water route 23.

In some specific examples, when the membrane stack 20 is subjected to waste cleaning, the liquid discharged from the concentrate waterway 23 and the fresh waterway 22 flows to the waste water tank 50, and the preset condition is that the waste water tank 50 is full of liquid, that is, after the waste water tank 50 is full of the liquid discharged from the concentrate waterway 23 and the fresh waterway 22, the water outlet valve is closed, the return valve is opened, and the membrane stack 20 is subjected to self-circulation cleaning.

A specific embodiment according to the present invention is described below with reference to fig. 1.

The waterway system 100 comprises a water inlet tank 40, a raw water waterway 10 and a membrane stack 20, wherein the membrane stack 20 is provided with a water inlet waterway 21, a fresh water waterway 22 and a concentrated water waterway 23, the raw water waterway 10 is connected with the water inlet tank 40, a water pump is arranged on the raw water waterway 10, the water inlet waterway 21 is communicated with the raw water waterway 10, the fresh water waterway 22 is provided with a first water outlet valve 31, the concentrated water waterway 23 is provided with a second water outlet valve 32, the concentrated water waterway 23 is connected with a wastewater tank 50, the membrane stack 20 is also provided with a first backflow waterway 24 and a second backflow waterway 25, the first backflow waterway 24 is provided with a first backflow valve 33, and the second backflow waterway 25 is provided with a second backflow valve 34.

In the case where the membrane stack 20 is operating normally, the first and

second return valves

33 and 34 are closed, the first and

second outlet valves

31 and 32 are opened, and the membrane stack 20 is inlet and outlet with normal water.

When the membrane stack 20 needs acid cleaning, acid cleaning agent is put into the raw water path 10, the water pump is started to introduce the acid cleaning agent into the membrane stack 20, the first backflow valve 33 and the second backflow valve 34 are conducted, backflow is carried out through the first backflow water path 24 and the second backflow water path 25, and acid cleaning is repeated, so that inorganic pollution in the membrane stack 20 is eliminated.

After acid cleaning, the membrane stack 20 needs to be cleaned by waste discharge, at this time, the first water outlet valve 31 and the second water outlet valve 32 are switched on, the first backflow valve 33 and the second backflow valve 34 are closed, water in the water inlet tank 40 is replaced, clean tap water can be filled in the water inlet tank 40, the clean water enters the membrane stack 20 to flush most of citric acid in the membrane stack 20, and the fresh water and the concentrated water which are discharged are both put into the waste water tank 50.

After the wastewater tank 50 is full, the membrane stack 20 is cleaned by self-circulation, at this time, the first water outlet valve 31 and the second water outlet valve 32 are closed, the first return valve and the second return valve 34 are opened, water in the water inlet tank 40 enters the membrane stack 20 for circulation, and the water inlet is closed after a period of time.

And replacing the water in the water inlet tank 40 again, pouring the water in the water inlet tank 40, then taking water again to clean the fresh water waterway, at the moment, closing the first water outlet valve 31, closing the second backflow valve 34, conducting the second water outlet valve 32, conducting the first backflow valve 33, directly enabling the water in the water inlet tank 40 to enter the waste water tank 50 through the membrane stack 20, and stopping water inlet after the waste water tank 50 is full.

In a specific example, the volume of the water inlet tank 40 is 5L, the volume of the wastewater tank 50 is 1L, after acid cleaning, the membrane stack 20 needs to be subjected to waste discharge cleaning and self-circulation cleaning, the water inlet flow is controlled to be 1000mL/min, first, the first return valve 33 and the second return valve 34 are closed, the first water outlet valve 31 and the second water outlet valve 32 are communicated for waste discharge cleaning, so that water in the water inlet tank 40 enters the membrane stack 20 to flush most of citric acid in the membrane stack 20, and water from the fresh water circuit 22 and the concentrated water circuit 23 is discharged into the wastewater tank 50; after the wastewater tank 50 is filled, 4L of water is still in the water inlet tank 40, at this time, the first return valve 33 and the second return valve 34 are conducted, the first water outlet valve 31 and the second water outlet valve 32 are closed, and self-circulation cleaning is carried out; and after the self-circulation cleaning is carried out for 20 minutes, the power supply is turned off, the water in the water inlet tank 40 is changed into new tap water to carry out fresh water waterway cleaning, at the moment, the first water outlet valve 31 and the second reflux valve 34 are closed, the second water outlet valve 32 and the first reflux valve 33 are communicated, the water inlet flow is 500mL/min, and after the wastewater tank 50 is filled, the power supply is turned off to pour the wastewater.

The in-process of waste discharge cleaning, self-circulation cleaning and fresh water waterway cleaning can completely take away the pickling cleaning liquid in the waterway system 100, so that the pickling cleaning liquid is prevented from remaining in the membrane stack 20, clean and pure water can be outputted outwards when the waterway system 100 is normally used, and the taste of a user is improved.

It should be noted that, in the present application, during the cleaning process of the membrane stack 20, the voltage of the membrane stack 20 is preferably turned off, so as to avoid the influence of the electrodialysis of the membrane stack 20 on the cleaning effect.

Of course, the raw water waterway 10 is directly connected to a tap water faucet, the fresh water waterway 22 and the concentrated water waterway 23 are directly connected to a sewer, tap water is opened to the maximum, the total water inlet and outlet flow can reach 1500mL/min, and the effect of no peculiar smell can be achieved after flushing for 15 min.

According to the water purifying equipment provided by the embodiment of the utility model, the waterway system 100 of the water purifying equipment provided by the embodiment of the utility model is adopted, so that the cleaning effect of the membrane stack 20 can be improved, the peculiar smell of the outlet water is reduced, drinking water with good water quality can be provided for users, the user experience is good, the cleaning is convenient, and the service life of the water purifying equipment is long.

As shown in fig. 2, the method for cleaning the membrane stack of the water purification apparatus according to the embodiment of the present invention includes the steps of:

s1, controlling the water outlet waterway of the membrane stack to be communicated, and the backflow waterway to be disconnected, and carrying out waste discharge and cleaning on the membrane stack;

and S2, when the waste discharge cleaning reaches the preset condition, the water outlet waterway of the membrane stack is controlled to be disconnected, the return waterway is conducted, and the membrane stack is subjected to self-circulation cleaning.

According to the cleaning method of the membrane stack of the water purification equipment, disclosed by the embodiment of the utility model, the water treatment capacity of the membrane stack is improved and the service life of the membrane stack is prolonged through self-circulation cleaning; through set up the washing of wasting discharge before self-loopa washs, can further improve the cleaning performance of membrane heap, reduce out water peculiar smell to can provide the drinking water that quality of water is good for the user, user experience is good.

According to one embodiment of the utility model, the outlet waterway comprises a fresh water waterway provided with a first outlet valve and a concentrate waterway provided with a second outlet valve, and the return waterway comprises a first return waterway having a first return valve and a second return waterway having a second return valve.

Wherein, the play water route of control membrane stack switches on, and the disconnection of backward flow water route includes: the first water outlet valve is controlled to be communicated, the second water outlet valve is controlled to be communicated, the first backflow valve is controlled to be closed, the second backflow valve is controlled to be closed, the membrane stack is cleaned in a waste discharge mode, at the moment, water flowing out of the membrane stack can be discharged through the fresh water waterway and the concentrated water waterway, and can be discharged to the waste water tank or can be directly discharged to a sewer.

The play water route disconnection of control membrane stack, and the backward flow water route switches on including: and controlling the first water outlet valve to be closed, the second water outlet valve to be closed, the first return valve to be communicated, the second return valve to be communicated, and performing self-circulation cleaning on the membrane stack. That is, the water flowing out of the fresh water waterway may be returned to the raw water waterway through the first return waterway, and the water flowing out of the concentrated water waterway may be returned to the raw water waterway through the second return waterway. In other words, the water flow direction of the water path system can flow through the raw water path, the water inlet path, the membrane stack, the first backflow water path and the raw water path in sequence, and/or the water flow direction can flow through the raw water path in sequence, the water inlet path, the membrane stack, the second backflow water path and the raw water path, the circulation flow of water between the membrane stack and the raw water path is realized through the first backflow water path and the second backflow water path, the self-circulation cleaning is carried out, the membrane stack is cleaned and washed conveniently, and the water treatment capacity and the service life of the membrane stack are improved.

According to one embodiment of the utility model, the cleaning method of the membrane stack comprises the following steps:

s2, when the waste discharge cleaning reaches the preset condition, controlling the water outlet waterway of the membrane stack to be disconnected and the return waterway to be connected, and performing self-circulation cleaning on the membrane stack;

s3, controlling the first water outlet valve to be closed and the second return valve to be closed, controlling the second water outlet valve to be switched on and controlling the first return valve to be switched on, and cleaning the membrane stack in the fresh water waterway, wherein at the moment, the water flow flowing out of the fresh water waterway can flow back to the raw water waterway through the first return waterway, the fresh water waterway is circularly cleaned, the water flow flowing out of the concentrated water waterway can be directly discharged to a waste water tank or a sewer, and when the concentrated water waterway is discharged to the waste water tank, the cleaning can be stopped when the waste water tank is full of water.

In some examples, the inflow rate of the self-circulation cleaning is greater than that of the cleaning in the fresh water waterway, so that the cleaning effect of the fresh water waterway is effectively improved, and the pickling cleaning liquid is completely replaced by clean water. Or the self-circulation cleaning time is longer than that of the fresh water waterway, and the cleaning effect of the fresh water waterway can be improved.

In one embodiment, the water flow from the recycle wash stage is 1000mL/min, the cycle time is 20 minutes, the secondary waste wash is 500mL/min, and the flush time is 2 minutes. Therefore, the cleaning effect of the membrane stack is effectively improved, and the pickling cleaning liquid is completely replaced by clean water.

According to one embodiment of the utility model, the effluent water path is communicated with a waste water tank, and the preset condition is that the waste water tank of the water purification device is filled with liquid, for example, the waste water tank is arranged on a concentrated water path, and the fresh water path can be communicated with the waste water tank, so that water can be discharged into the waste water tank during waste discharge cleaning and fresh water path cleaning, and furthermore, pickling cleaning liquid can be uniformly discharged into the waste water tank through the concentrated water path. When the membrane stack is subjected to waste discharge cleaning, liquid discharged from the concentrated water channel and the fresh water channel flows to the waste water tank, the waste water tank is filled with the liquid discharged from the concentrated water channel and the fresh water channel, the water outlet valve is closed, the reflux valve is switched on, and the membrane stack is subjected to self-circulation cleaning.

As shown in fig. 3, according to one embodiment of the present invention, a method for cleaning a membrane stack includes the steps of:

s0, adding an acid washing agent, and carrying out acid washing on the membrane stack;

and S3, controlling the first water outlet valve to be closed, the second return valve to be closed, and controlling the second water outlet valve to be conducted and the first return valve to be conducted, and cleaning the membrane stack in the fresh water waterway.

Because the membrane stack can appear comparatively serious inorganic pollution when long-term operation, the existence of inorganic pollution can reduce membrane stack ion separation effect, makes the water treatment capacity of membrane stack reduce, therefore adds the pickling medicament to the raw water route, and the membrane stack is pickled, and the pickling in-process, the washing water that has the pickling medicament can be through the circulation flow between membrane stack and raw water route of backward flow water route to reach the mesh of getting rid of the interior inorganic pollutant of membrane stack. Wherein the acid washing agent may be citric acid.

Further, because the water after the citric acid washs has certain peculiar smell, therefore make the membrane stack wash of wasting discharge earlier, discharge away the great citric acid water of concentration in the membrane stack, carry out the self-loopa again and wash, can thoroughly solve the problem of the play water peculiar smell after the citric acid washs, improved the cleaning performance of membrane stack.

Other constructions and operations of the water purifying apparatus according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 the utility model. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a waterway system of water purifying equipment, which comprises:

a raw water waterway;

the membrane stack is provided with a water inlet waterway, a water outlet waterway and a backflow waterway, the water inlet waterway is communicated with the raw water waterway, the water outlet waterway is provided with a water outlet valve, the backflow waterway is communicated with the raw water waterway, the backflow waterway is provided with a backflow valve,

wherein the membrane stack is suitable for waste discharge and cleaning when the water outlet valve is switched on and the return valve is switched off; the membrane stack is suitable for closing the water outlet valve and conducting the reflux valve to carry out self-circulation cleaning when the waste discharge cleaning reaches a preset condition.

2. The waterway system of a water purifying apparatus of claim 1, wherein the outlet waterway comprises a fresh water waterway and a concentrated water waterway, the outlet valve comprises a first outlet valve and a second outlet valve, the first outlet valve is disposed in the fresh water waterway, the second outlet valve is disposed in the concentrated water waterway,

the membrane stack is suitable for waste discharge and cleaning when the first water outlet valve is conducted, the second water outlet valve is conducted and the return valve is closed; the membrane stack is suitable for closing the first water outlet valve and the second water outlet valve and conducting the reflux valve to carry out self-circulation cleaning when the waste discharge cleaning reaches a preset condition.

3. The waterway system of a water purification unit of claim 2, wherein the return waterway comprises:

one end of the first backflow waterway is connected with the first backflow interface of the fresh water waterway, the other end of the first backflow waterway is connected with the raw water waterway, and the first backflow waterway is provided with a first backflow valve;

one end of the second backflow waterway is connected with the second backflow interface of the concentrated water waterway, the other end of the second backflow waterway is connected with the raw water waterway, the second backflow waterway is provided with a second backflow valve,

the membrane stack is suitable for conducting waste discharge cleaning when the first water outlet valve is conducted, the second water outlet valve is conducted, the first backflow valve is closed, and the second backflow valve is closed; the membrane stack is suitable for closing the first water outlet valve and the second water outlet valve and conducting the first backflow valve and the second backflow valve to carry out self-circulation cleaning when the waste discharge cleaning reaches a preset condition.

4. The waterway system of a water purifying device of claim 3, wherein the membrane stack is cleaned by the fresh water waterway when the first outlet valve is closed, the second return valve is closed, the second outlet valve is conducted, and the first return valve is conducted.

5. The waterway system of a water purifying device of claim 4, wherein the inflow rate of the self-circulation cleaning is greater than the inflow rate of the fresh water waterway cleaning, and/or the self-circulation cleaning time is greater than the fresh water waterway cleaning time.

6. The waterway system of a water purification unit of claim 3, wherein the first return connection is located upstream of the first outlet valve and the second return connection is located upstream of the second outlet valve.

7. The waterway system of a water purification unit of claim 3, further comprising: the water inlet tank is arranged on the raw water waterway, the first backflow waterway is communicated with the water inlet tank, and the second backflow waterway is communicated with the water inlet tank.

8. The waterway system of a water purification unit of claim 2, further comprising: the waste water tank is arranged on the concentrated water waterway, and the fresh water waterway is communicated with the waste water tank.

9. The waterway system of a water purifying device of claim 8, wherein when the membrane stack is cleaned by waste discharge, the liquid discharged from the concentrate waterway and the fresh waterway flows to the waste water tank, and the preset condition is that the waste water tank is filled with the liquid.

10. The waterway system of a water purification unit of any one of claims 1-9, further comprising: and the water pump is connected to the upstream of the membrane stack and is used for driving water to flow in each water channel of the water channel system.

11. The waterway system of a water purifying device of any one of claims 1-9, wherein the outlet valve is a solenoid valve, and/or the return valve is a solenoid valve.

12. The waterway system of a water purification unit of any one of claims 1-9, wherein the membrane stack is an electrodialysis membrane stack.

13. A water purification apparatus, comprising a waterway system of the water purification apparatus of any one of claims 1 to 12.