CN110924058A - Self-cleaning control method for water treatment device and washing machine - Google Patents
Self-cleaning control method for water treatment device and washing machine Download PDFInfo
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- CN110924058A CN110924058A CN201811005369.6A CN201811005369A CN110924058A CN 110924058 A CN110924058 A CN 110924058A CN 201811005369 A CN201811005369 A CN 201811005369A CN 110924058 A CN110924058 A CN 110924058A
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- electric flocculation
- water
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- container
- cleaning
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention relates to the field of washing machines, and discloses a control method for self-cleaning of a water treatment device and a washing machine, wherein the control method comprises the following steps: s1: feeding water into an electric flocculation container (21) of the water treatment device to a preset water level; s2: starting an electric flocculation program to enable an electric flocculation reaction to occur in the electric flocculation container, and cleaning the electric flocculation container; s3: a filtering unit (26) for filtering the treated water produced by the electrocoagulation reaction, the filtered treated water flowing into the water tub (11); s4: reversely returning the treated water in the water tub to the electric flocculation container (21) and flushing the filtering unit (26). In the invention, the electric flocculation container is self-cleaned by using the electric flocculation technology, colloid and micro-bubbles generated in the electric flocculation reaction process can reach any corner of the electric flocculation container, and pollutants are separated from the washing machine under the flocculation action of the colloid and the impact of the micro-bubbles, thereby achieving the purpose of thoroughly removing flocculate colloid.
Description
Technical Field
The invention relates to a washing machine, in particular to a control method for self-cleaning of a water treatment device and the washing machine.
Background
With the development of economic technology, environmental pollution, such as water pollution, is more and more serious, and in order to treat the environment, the national regulation requires that the discharge of sewage meets certain requirements. Among them, domestic sewage is an important cause of water pollution, and laundry wastewater is now an important source of domestic sewage, mainly caused by detergents in the laundry wastewater. Therefore, from the viewpoint of environmental protection, it is required to reduce the concentration of detergent in the laundry waste water, to perform purification before discharge or to recycle the laundry water for washing machines to reduce the discharge of sewage. Therefore, it is more and more important to treat laundry wastewater and achieve discharge up to standards and recycling of water.
At present, some washing machines treat laundry wastewater by an electrocoagulation technology, colloid precipitate generated in the electrocoagulation reaction is filtered to complete mud-water separation, and solid mud-like waste after filtration is left in a filter bag. However, the filter bag needs to be replaced manually after washing is finished every time, and the automation degree is not high. And above-mentioned process needs operate in an independent electric flocculation container, and the flocculation colloid that the electric flocculation produced can be attached to the inner wall of container, leads to the dirty of electric flocculation container inner wall, easily breeds the bacterium after long-time the use. Therefore, some washing machines have a self-cleaning function, and particularly throw inlet water to the inner wall of the flocculation container for cleaning through a water throwing impeller. However, the self-cleaning method cannot achieve the effect of thorough cleaning because the adhesion of the flocculate colloid is large and the stirring and water flushing forces are small; and because the flocculation structure is complicated, the water flow scouring is difficult to completely cover, and the self-cleaning effect of the flocculation container is not ideal.
Therefore, there is a need to provide a controlled method that can completely remove floc colloids.
Disclosure of Invention
The invention aims to solve the problem that a washing machine in the prior art cannot completely remove flocculated colloid, and provides a self-cleaning control method of a water treatment device and the washing machine.
In order to achieve the above object, an aspect of the present invention provides a method for controlling self-cleaning of a water treatment apparatus, including:
s1: feeding water into an electric flocculation container of the water treatment device to a preset water level;
s2: starting an electric flocculation program to enable an electric flocculation reaction to occur in the electric flocculation container, and cleaning the electric flocculation container;
s3: filtering the treated water generated by the electrocoagulation reaction through a filtering unit, wherein the filtered treated water flows into a water bucket;
s4: and reversely refluxing the treated water in the water bucket into the electric flocculation container, and flushing the filtering unit.
Preferably, step S2 further includes: s22: after the electric flocculation reaction is finished, standing the sewage in the electric flocculation container
Preferably, before step S1: s0: and judging whether the electric flocculation container needs to be cleaned or not, and starting water inlet if the electric flocculation container needs to be cleaned.
Preferably, the control method includes the steps of:
s5: and accumulating the number of times of one-time cleaning, judging whether the number of times of cleaning reaches the preset number of times of cleaning, returning to the step S2 if the number of times of cleaning is less than the preset number of times of cleaning, and otherwise, discharging the washed sewage in the electric flocculation container. A second aspect of the present invention provides a washing machine including:
a laundry treating unit;
the water treatment device is communicated with a sewage discharge port of the clothes treatment unit and comprises an electric flocculation container and an electrode plate arranged in the electric flocculation container, wherein the electrode plate generates an electric flocculation reaction in the electric flocculation container after being powered on, and the water treatment device is also provided with a sewage discharge port for discharging sewage in the electric flocculation container;
the filtering unit is used for filtering the sewage in the electric flocculation container;
a back flushing unit for back flushing the filtration unit;
and the control unit carries out self-cleaning on the water treatment device by the control method.
Preferably, the sewage outlet of the clothes treatment unit is communicated with the water treatment device through a sewage inlet pipe, the electric flocculation container comprises a purified water outlet, the purified water outlet is communicated with the water inlet of the clothes treatment unit through a circulating pipeline, and the filtering unit is arranged at the purified water outlet.
Preferably, the filtration unit is disposed outside the electroflocculation vessel.
Preferably, the back flushing unit comprises a back flushing pipeline, a back flushing control valve is arranged on the back flushing pipeline, one end of the back flushing pipeline is communicated with the sewage inlet pipe, the other end of the back flushing pipeline is communicated with the circulating pipeline, and a connection point of the back flushing pipeline and the circulating pipeline is located upstream of the filtering unit so as to be used for back flushing the filtering unit.
Preferably, be provided with drain control valve, electric flocculation intake control valve and first suction unit on the sewage inlet tube, drain control valve and electric flocculation intake control valve are located the back flush pipeline with the both sides of sewage inlet tube tie point just electric flocculation intake control valve is located and is close to one side of electric flocculation container.
Preferably, a circulating water control valve and a second pumping unit are arranged on the circulating pipeline, the circulating water control valve and the second pumping unit are respectively positioned on two sides of a connection point of the back flushing pipeline and the circulating pipeline, and the circulating water control valve is positioned on one side close to the electric flocculation container.
In the invention, the electric flocculation container is self-cleaned by utilizing the electric flocculation technology, and the colloid and the micro bubbles generated in the electric flocculation reaction process can reach any corner pollutant of the electric flocculation container and are separated from the electric flocculation container under the flocculation action of the colloid and the impact of the micro bubbles, so that the purpose of thoroughly removing flocculate colloid is achieved, and the water treatment device is thoroughly cleaned.
Drawings
Fig. 1 is a schematic structural view of a washing machine according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method for self-cleaning of a water treatment apparatus according to an embodiment of the present invention.
Description of the reference numerals
10-a laundry treating unit; 11-a water bucket;
20-a water treatment device; 21-an electrocoagulation vessel;
22-an electrode plate; 23-an external power supply;
24-a sewage discharge port; 25-a purified water outlet;
26-a filtration unit; 27-a sewage discharge pipe;
27 a-a sewage drain valve; 30-a sewage inlet pipe;
31-a drain control valve; 32-electric flocculation water inlet control valve;
33-a first suction unit; 40-a circulation pipeline;
41-circulating water control valve; 42-a second suction unit;
50-back flushing the pipeline; 51-back flush control valve;
60-a water level sensor; 70-water inlet pipe;
71-water inlet valve.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, use of directional terms such as "upper, lower, left, right, top, bottom" is generally made with respect to the orientation shown in the drawings or with respect to the positional relationship of the components with respect to each other in the vertical, or gravitational direction. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself. In addition, "a plurality" referred to in the present invention means two or more and includes two.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
According to an aspect of the present invention, as shown in fig. 2, embodiments of the present invention provide a control method of self-cleaning of a water treatment apparatus and a washing machine. Wherein the washing machine includes a laundry treating unit 10, a water treating device 20, a filtering unit 26, a back washing unit, and a control unit. Wherein, the water treatment device 20 is communicated with the sewage discharge port of the clothes treatment unit 10, the water treatment device 20 comprises an electric flocculation container 21 and an electrode plate 22 arranged in the electric flocculation container 21, the electrode plate 22 is used for connecting an external power supply 23, the electrode plate generates electric flocculation reaction in the electric flocculation container 21 after being connected with the power supply, and the water treatment device 20 is also provided with a sewage discharge port 24 for discharging the sewage in the electric flocculation container 21. Further, the filtering unit 26 is used for filtering the sewage in the electric flocculation container 21; the backflush unit is used to backflush the filter unit 26. The control method comprises the following steps:
s1: feeding water into an electric flocculation container 21 of the water treatment device to a preset water level;
s2: starting an electric flocculation program to enable an electric flocculation reaction to occur in the electric flocculation container 21, and cleaning the electric flocculation container 21;
s3: the treated water produced by the electrocoagulation reaction is filtered by the filtering unit 26, and the filtered treated water flows into the water tub 11;
s4: the treated water in the tub 11 is reversely returned to the electrocoagulation container 21, and the filtration unit 26 is rinsed.
Correspondingly, the control unit of the washing machine provided by the embodiment performs self-cleaning on the water treatment device (specifically, the electric flocculation container 21) by the control method. In the present invention, by using the electric flocculation technique to self-clean the electric flocculation container 21, the colloid and micro bubbles generated during the electric flocculation reaction can reach any corner of the electric flocculation container 21 (the principle of electric flocculation will be described in detail below), and the pollutants are separated from the electric flocculation container 21 under the flocculation action of the colloid and the impact of the micro bubbles, so as to achieve the purpose of thoroughly removing the colloid of the flocculate, and further thoroughly clean the electric flocculation container 21.
The principle of the invention for self-cleaning of the water treatment device is that of an electric flocculation technology, specifically, iron, aluminum and other metals are used as anodes, multivalent ions such as Al3+, Fe2+, Al3+, Fe3+ and the like can be generated in the electric flocculation device under the action of direct current, a series of polynuclear hydroxyl complexes and hydroxide colloids can be formed through hydrolysis and polymerization, the substances have adsorption and condensation functions, pollutants such as detergent, oil stain, suspended matters, bacteria, viruses and the like in sewage generate large floccules, the sewage is electrolyzed under the action of the substances, electrodes can continuously generate oxygen and hydrogen to form tiny bubbles with adhesive performance, and the bubbles bring the flocculent suspended matters to the water surface in the self-floating process, so that the purpose of removing the pollutants is achieved, and the purification treatment of the sewage is realized.
According to another aspect of the present invention, the washing machine provided by the present invention can self-clean the electric flocculation container 21 by using the electric flocculation technology, has a simple structure and a small volume, does not need to add chemical agents in the sewage treatment process, has low treatment cost, and can realize complete automatic control. Meanwhile, pollutants such as floc in the electric flocculation container 21 are thoroughly cleaned under the flocculation action of the colloid and the impact of micro bubbles.
Further, with the control method provided in the present embodiment, in order to be able to more quickly and completely remove contaminants such as flocs in the electrocoagulation vessel 21, the step S2 includes the following steps: s22: and after the electric flocculation reaction is finished, standing the sewage in the electric flocculation container 21.
Further, before step S1: s0: and judging whether the electric flocculation container 21 needs to be cleaned or not, and starting water inlet if the electric flocculation container needs to be cleaned. Specifically, the user can preset the washing times through the control unit for judgment, and when the using times of the washing machine reach the preset value, the user is reminded of needing to clean the electric flocculation container 21; or may be determined by user observation.
In addition, according to the requirements of different users, the electric flocculation container 21 can be cleaned for a plurality of times, and specifically, the control method comprises the following steps: s5: and accumulating the number of times of one-time cleaning, judging whether the number of times of cleaning reaches a preset number of times of cleaning, returning to the step S2 if the number of times of cleaning is less than the preset number of times of cleaning, and otherwise, discharging the washed sewage in the electric flocculation container 21. That is, whether the number of times of cleaning reaches a preset number of times of cleaning is judged, and if the number of times of cleaning is less than the preset number of times of cleaning, the electrocoagulation program is started again, so that the electrocoagulation reaction occurs again in the electrocoagulation container 21; after the electric flocculation reaction is finished, standing the water in the electric flocculation container 21; the standing-treated sewage is filtered and circulated into the tub of the laundry treating unit 10 for back-flushing the filtering unit 26. On the other hand, if it is determined that the number of times of cleaning has reached the preset number of times of cleaning, the sewage after washing of the electrocoagulation container 21) is discharged at the most, and the self-cleaning procedure is ended. That is, the invention can be cleaned for a plurality of times according to the actual needs, and the cleaned water can be recycled, namely, the one-time water inlet can realize a plurality of self-cleaning washing, thereby saving a large amount of cleaning water; moreover, the colloid and the micro-bubbles generated in each electroflocculation reaction process can reach any corner of the electroflocculation device, and pollutants are separated from the electroflocculation device under the flocculation action of the colloid and the impact of the micro-bubbles, so that the thorough cleaning of the electroflocculation container is realized.
For the convenience of understanding, as shown in fig. 2, the control method provided by the present invention will be described in detail by specific embodiments below:
when the electric flocculation container 21 is used, whether the electric flocculation container 21 needs to be cleaned is judged, if the electric flocculation container 21 needs to be cleaned, a user can start a preset self-cleaning program of the washing machine in a mode of pressing keys and the like, specifically, water is fed into the electric flocculation container 21, and when the water inflow reaches a preset water level (the water can be fed into the water can 11 through the water inlet pipe 70 above the water can 11, and the water inflow can be controlled through the water inlet valve 71 arranged on the water inlet pipe 70, so that the water is fed into the electric flocculation container 21; then starting an electric flocculation program to perform an electric flocculation reaction on the flocculation gel attached in the electric flocculation container 21, wherein the electric flocculation reaction is performed for a preset time period; after the electric flocculation reaction is finished, the water in the electric flocculation container 21 is subjected to standing treatment (namely, flocculation residue precipitation); filtering the sewage (which may be referred to as the treated water generated by the electrocoagulation reaction as mentioned above) in the electrocoagulation container 21, wherein the filtered treated water flows into the water tub 11, the treatment in the water tub 11 reversely flows back to the electrocoagulation container 21 through the backwash control valve, and the filtering unit 26 is flushed; the filter unit is flushed and the sewage can be discharged from the sewage discharge pipe 27, and of course if repeated cleaning is required for a plurality of times, the electrocoagulation reaction procedure can be started again, and then the above process is repeated until the preset cleaning times are reached. And finally, discharging the sewage in the electric flocculation container 21, and finishing the self-cleaning procedure.
The cleaning program of the electric flocculation container 21 can be preset and stored in the control unit of the washing machine and is independent of other washing programs, as described above, a user can select to start the cleaning program to clean the electric flocculation container 21 according to needs, the control unit can also judge whether the electric flocculation container 21 needs to be cleaned, and the washing machine can inform the user of cleaning through panel reminding, alarming and other modes when the cleaning is needed, so that the phenomenon that bacteria are bred and secondary pollution is caused due to the fact that the electric flocculation container 21 is not cleaned for a long time is avoided.
Of course, the control method provided by the present invention may also be used for washing the water tub 11 of the laundry processing unit 10, that is, the electrode plate of the water processing apparatus 20 is installed in the water tub 11, and the lint and other contaminants in the water tub 11 are separated from the washing machine under the flocculation action of the colloid and the impact of the micro-bubbles, so that the automatic washing of the washing machine can be realized.
In the washing machine according to the present embodiment, the sewage outlet of the laundry treatment unit 10 is communicated with the water treatment device 20 through the sewage inlet pipe 30, the electrocoagulation container 21 includes a purified water outlet 25, the purified water outlet 25 is communicated with the water inlet of the laundry treatment unit 10 through the circulation pipe 40, and the filtering unit 26 is disposed at the purified water outlet 25. Wherein, in order to facilitate the installation and the disassembly, the filtering unit 26 is preferably arranged outside the electric flocculation vessel 21.
Further, the back flushing unit comprises a back flushing pipe 50 and a back flushing control valve 51 arranged on the back flushing pipe 50, one end of the back flushing pipe 50 is communicated with the sewage inlet pipe 30, the other end of the back flushing pipe 50 is communicated with the circulation pipe 40, and the connection point of the back flushing pipe 50 and the circulation pipe 40 is located upstream of the filtering unit 26 for back flushing the filtering unit 26. That is, the present invention may back-flush the filter unit 26 by the purified water circulated into the tub 11 of the laundry treating unit 10, so that it may be possible to prevent the filter unit 26 from being clogged with lint or the like due to an excessively long use time, thereby affecting the normal self-cleaning process.
In addition, in the washing machine, the sewage inlet pipe 30 is provided with a drain control valve 31, an electric flocculation inlet control valve 32 and a first pumping unit 33, the drain control valve 31 and the electric flocculation inlet control valve 32 are located at both sides of a connection point of the back washing pipe 50 and the sewage inlet pipe 30 and the electric flocculation inlet control valve 32 is located at a side close to the electric flocculation container 21.
Further, a circulation water control valve 41 and a second pumping unit 42 are provided on the circulation pipe 40, the circulation water control valve 41 and the second pumping unit 42 are respectively located at both sides of a connection point of the back-flushing pipe 50 and the circulation pipe 40, and the circulation water control valve 41 is located at a side close to the electrocoagulation container 21. Wherein, the first suction unit 33 and the second suction unit 42 may be both water pumps.
Further, a sewage discharge pipe 27 may be installed at the sewage discharge port 24 of the electrocoagulation container 21, and a sewage discharge valve 27a may be provided on the sewage discharge pipe 27, so that the sewage and the sludge in the electrocoagulation container 21 can be discharged as needed.
The washing machine provided by the invention not only solves the problems that the existing washing machine does not have an automatic washing function, but also the electric flocculation container 21 can be attached with flocculated dirt to breed bacteria after being used for a long time, and the washing machine can be used for washing for multiple times according to actual needs, can recycle washing water, and solves the problem that the electric flocculation container 21 cannot be thoroughly washed by water flow washing.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. A control method for self-cleaning of a water treatment device is characterized by comprising the following steps:
s1: feeding water into an electric flocculation container (21) of the water treatment device to a preset water level;
s2: starting an electric flocculation program to enable an electric flocculation reaction to occur in the electric flocculation container (21), and cleaning the electric flocculation container (21);
s3: a filtering unit (26) for filtering the treated water produced by the electrocoagulation reaction, the filtered treated water flowing into the water tub (11);
s4: reversely returning the treated water in the water tub (11) to the electric flocculation container (21) and flushing the filtering unit (26).
2. The control method of self-cleaning of a washing machine as claimed in claim 1, wherein the step S2 further comprises:
s22: and after the electric flocculation reaction is finished, standing the sewage in the electric flocculation container (21).
3. The control method of self-cleaning of a washing machine as claimed in claim 1, wherein before step S1: s0: and judging whether the electric flocculation container (21) needs to be cleaned or not, and starting water inlet if the electric flocculation container needs to be cleaned.
4. A control method of self-cleaning of a washing machine as claimed in claim 1, characterized in that the control method comprises the steps of:
s5: and accumulating the number of times of one-time cleaning, judging whether the number of times of cleaning reaches the preset number of times of cleaning, if the number of times of cleaning is less than the preset number of times of cleaning, returning to the step S2, and if not, discharging the sewage after washing in the electric flocculation container (21).
5. A washing machine, characterized in that the washing machine comprises:
a laundry treatment unit (10);
a water treatment device (20), the water treatment device (20) being in communication with a sewage discharge port of the laundry treatment unit (10), the water treatment device (20) including an electric flocculation container (21) and electrode plates (22) provided in the electric flocculation container (21), the electrode plates causing an electric flocculation reaction in the electric flocculation container (21) after power-on, the water treatment device (20) further having a sewage discharge port (24) for discharging sewage in the electric flocculation container (21);
a filtration unit (26), the filtration unit (26) being for filtering the effluent within the electroflocculation vessel (21);
a back flushing unit for back flushing the filter unit (26);
a control unit that self-cleans the water treatment apparatus by the control method of any one of claims 1 to 4.
6. The washing machine according to claim 5, wherein a sewage discharge port of the laundry treating unit (10) communicates with the water treating device (20) through a sewage inlet pipe (30), the electrocoagulation container (21) includes a purified water outlet (25), the purified water outlet (25) communicates with a water inlet of the laundry treating unit (10) through a circulation pipe (40), and the filtering unit (26) is provided at the purified water outlet (25).
7. Washing machine according to claim 6, characterized in that the filtering unit (26) is arranged outside the electroflocculation vessel (21).
8. Washing machine according to claim 6, characterized in that the backflush unit comprises a backflush duct (50) and a backflush control valve (51) arranged on the backflush duct (50), one end of the backflush duct (50) communicating with the sewage inlet pipe (30), the other end of the backflush duct (50) communicating with the circulation duct (40), and the connection point of the backflush duct (50) with the circulation duct (40) being located upstream of the filter unit (26) for backflushing the filter unit (26).
9. The washing machine as claimed in claim 8, wherein a drain control valve (31), an electric flocculation water inlet control valve (32) and a first pumping unit (33) are provided on the sewage inlet pipe (30), the drain control valve (31) and the electric flocculation water inlet control valve (32) are respectively located at both sides of a connection point of the back washing pipe (50) and the sewage inlet pipe (30) and the electric flocculation water inlet control valve (32) is located at a side close to the electric flocculation container (21).
10. The washing machine as claimed in claim 9, wherein a circulation water control valve (41) and a second pumping unit (42) are provided on the circulation duct (40), the circulation water control valve (41) and the second pumping unit (42) being located at both sides of a connection point of the back-flushing duct (50) and the circulation duct (40), respectively, and the circulation water control valve (41) being located at a side adjacent to the electrocoagulation container (21).
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| CN201811005369.6A CN110924058B (en) | 2018-08-30 | 2018-08-30 | Self-cleaning control method for water treatment device and washing machine |
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| CN201811005369.6A CN110924058B (en) | 2018-08-30 | 2018-08-30 | Self-cleaning control method for water treatment device and washing machine |
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| CN110924058B CN110924058B (en) | 2022-08-09 |
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