CN111056677A - Water purifier with automatic backwashing function and automatic backwashing method thereof - Google Patents
Water purifier with automatic backwashing function and automatic backwashing method thereof Download PDFInfo
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- CN111056677A CN111056677A CN201911421303.XA CN201911421303A CN111056677A CN 111056677 A CN111056677 A CN 111056677A CN 201911421303 A CN201911421303 A CN 201911421303A CN 111056677 A CN111056677 A CN 111056677A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 414
- 238000011001 backwashing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 9
- 238000003860 storage Methods 0.000 claims abstract description 85
- 239000008213 purified water Substances 0.000 claims abstract description 52
- 238000011010 flushing procedure Methods 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims abstract description 33
- 238000001914 filtration Methods 0.000 claims description 200
- 239000002699 waste material Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 38
- 239000011358 absorbing material Substances 0.000 claims description 28
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 2
- 238000004506 ultrasonic cleaning Methods 0.000 abstract description 4
- 241000894006 Bacteria Species 0.000 description 4
- 241000700605 Viruses Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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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
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/04—Disinfection
-
- 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
-
- 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
-
- 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
- C02F2303/20—Prevention of biofouling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a water purifier with automatic backwashing, which comprises: one-level filter equipment, the storage water tank, the booster pump, ultrasonic transducer and controlling means, one-level filter equipment income water end is connected with the oral siphon, be connected with first solenoid valve on the oral siphon, one-level filter equipment goes out the water end and is connected with the one-level outlet pipe that the other end was connected with storage water tank income water end, be connected with the second solenoid valve on the one-level outlet pipe, storage water tank return water end is connected with the back flow that the other end was connected with booster pump income water end, be connected with the third solenoid valve on the back flow, the booster pump goes out the water end and is connected with the first branch pipe that the other end was connected with one-level filter equipment play water end, one-level filter equipment drainage end is connected with one. The ultrasonic transducer is adopted to carry out ultrasonic cleaning on the primary filter element and is matched with purified water to carry out back-flushing cleaning on the primary filter element, so that the cleaning of the filter element is cleaner and more thorough.
Description
Technical Field
The invention relates to the technical field related to automatic cleaning of water purifiers, in particular to a water purifier with automatic backwashing and an automatic backwashing method thereof.
Background
Along with the continuous aggravation of water pollution, healthy water is more and more difficult to drink, so the household water purifier is well favored as a health article for drinkers.
Most of water purifiers adopt a progressive structure mode of a screen blocking filtering principle and are formed by connecting multi-stage filter elements in series end to end, and the filter elements are sequentially arranged from low to high in precision to realize that the multi-stage filter elements share and retain dirt, so that the filter element blockage, the manual pollution discharge and the times of disassembling and washing are reduced, and the period of replacing the filter elements is prolonged; however, after the filter element of the water purifier is used for a period of time, a layer of dirt is attached to the filter element, so that the filter element is blocked, the water purifying effect is poor, the filter element needs to be replaced periodically, and the later-stage use cost of the water purifier is greatly increased; or the filter element is cleaned manually, but the cleaning cost is increased, the filter element is polluted, and the filtering water quality is influenced.
Disclosure of Invention
The invention aims to provide a water purifier with automatic backwashing and an automatic backwashing method thereof so as to solve the technical problems.
The technical scheme adopted by the invention for solving the technical problem is as follows:
according to one aspect of the invention, a water purifier with automatic backwashing is designed, comprising: the primary filter device is internally provided with a primary filter element which divides the interior of the primary filter device into a primary first cavity and a primary second cavity, the water inlet end of the primary filter device is connected with a water inlet pipe, the water inlet pipe is connected with a first electromagnetic valve, the water outlet end of the primary filter device is connected with a primary water outlet pipe, the other end of the primary water outlet pipe is connected with the water inlet end of the water storage tank, the primary water outlet pipe is connected with a second electromagnetic valve, the water return end of the water storage tank is connected with a return pipe, the other end of the return pipe is connected with the water inlet end of the booster pump, the return pipe is connected with a third electromagnetic valve, the water outlet end of the booster pump is connected with a first branch pipe, the other end of the first branch pipe is connected with the water outlet end of the primary filter device, the water outlet end of the primary, the ultrasonic transducer, the booster pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are electrically connected with the control device.
By adopting the technical scheme, when the first-stage filtering device needs to be subjected to back-flushing cleaning, the control device controls the first electromagnetic valve and the second electromagnetic valve to be stopped, the ultrasonic transducer is started, dirt attached to the first-stage filter element is subjected to ultrasonic cleaning for a plurality of times, then the control device controls the third electromagnetic valve and the fourth electromagnetic valve to be started, and the booster pump is started; purified water in the water storage tank enters a first-stage second cavity in the first-stage filtering device through a return pipe and a first branch pipe, enters a first-stage first cavity through the first-stage filter element in a backflushing mode, and is discharged from a first-stage waste liquid pipe, so that the first-stage filtering device is automatically backflushed and cleaned; the ultrasonic transducer is adopted to carry out ultrasonic cleaning on the primary filter element and is matched with the filtered purified water to carry out back flush cleaning on the primary filter element, so that the primary filter element is cleaned more cleanly and thoroughly, the cleaning frequency can be set through the control device, the filter element can always keep the best filtering effect, the filter element of the water purifier does not need to be replaced or manually cleaned, and the family expenses are saved; in addition, set up ultrasonic transducer at primary filter device lateral wall, the ultrasonic wave that ultrasonic transducer produced can kill bacterium, the virus of aquatic, from this, can disinfect, disinfect to primary filter device is inside, prevents its inside germ that breeds.
In order to better solve the technical defects, the invention also has a better technical scheme that:
in some embodiments, the outer sidewall of the water storage tank is provided with an ultrasonic transducer.
Therefore, the ultrasonic transducer is arranged on the outer side wall of the water storage tank, bacteria, viruses and the like in water can be killed by ultrasonic waves generated by the ultrasonic transducer, harmful substances in the water are decomposed, and the water quality is further improved.
In some embodiments, a pressure switch electrically connected with the control device is connected to the water inlet pipe, and a sensor electrically connected with the control device is arranged in the water storage tank.
Therefore, when no water or too low water pressure exists in the water inlet pipe, the pressure switch feeds back information to the first electromagnetic valve of the control device to be stopped, the water inlet pipe of the water inlet machine is prevented from continuously working to cause damage to the water purifier, and the sensor can control the liquid level of the purified water in the water storage tank.
In some embodiments, the water outlet end of the water storage tank is connected with a purified water outlet pipe, the other end of the purified water outlet pipe is connected with a water outlet switch valve, and the purified water outlet pipe is connected with a fifth electromagnetic valve and a water flow switch which are electrically connected with the control device.
In some embodiments, the water purifier with automatic back flushing further comprises a secondary filtering device, a secondary filter element is arranged in the secondary filtering device, the secondary filter element divides the interior of the secondary filtering device into a secondary first cavity and a secondary second cavity, a primary water outlet pipe is connected with the water inlet end of the secondary filtering device, the water outlet end of the secondary filtering device is connected with a secondary water outlet pipe of which the other end is connected with the water storage tank, a sixth electromagnetic valve is connected on the secondary water outlet pipe, the water outlet end of the booster pump is connected with a second branch pipe of which the other end is connected with the water outlet end of the secondary filtering device, the first branch pipe and the second branch pipe are respectively connected with a first check valve and a second check valve, the water outlet end of the secondary filtering device is connected with a secondary waste liquid pipe, the secondary waste liquid pipe is connected with a seventh electromagnetic valve, the seventh electromagnetic valve and the ultrasonic transducer on the outer side wall of the secondary filtering device are electrically connected with the control device.
Therefore, when two filtering devices are arranged in the water purifier, the two filtering devices can be independently back-cleaned at the same time, the filter element is ultrasonically cleaned through the ultrasonic transducer and is back-flushed and cleaned by matching with filtered purified water, the cleaning is cleaner and more thorough, the cleaning frequency can be set through the control device, the filter element is enabled to keep the best filtering effect all the time, the filter element of the water purifier does not need to be replaced or manually cleaned, and the family expenses are saved; through setting up ultrasonic transducer at second grade filter equipment lateral wall, bacterium, the virus of aquatic can be killed to the ultrasonic wave that ultrasonic transducer produced, from this, can disinfect, disinfect to second grade filter equipment is inside, prevents its inside germ of breeding.
In some embodiments, the water purifier with automatic back washing further comprises a third-stage filtering device, a third-stage filter element is arranged in the third-stage filtering device, the third-stage filter element divides the interior of the third-stage filtering device into a third-stage first cavity and a third-stage second cavity, a second-stage water outlet pipe is connected with the water inlet end of the third-stage filtering device, the water outlet end of the third-stage filtering device is connected with a third-stage water outlet pipe, the other end of the third-stage water outlet pipe is connected with the water inlet end of the water storage tank, an eighth electromagnetic valve is connected onto the third-stage water outlet pipe, the water outlet end of the booster pump is connected with a third branch pipe, the other end of the booster pump is connected with the water outlet end of the third-stage filtering device, a third one-way valve is, and the ultrasonic transducers on the outer side walls of the ninth electromagnetic valve and the third-stage filtering device are electrically connected with the control device.
Therefore, when the three filtering devices are arranged in the water purifier, the three filtering devices can be independently back-cleaned at the same time, the ultrasonic transducer is used for carrying out ultrasonic cleaning on the filter element and matching with the filtered purified water to carry out back-flushing cleaning on the filter element, so that the cleaning is cleaner and more thorough, the cleaning frequency can be set through the control device, the filter element can always keep the best filtering effect, the filter element of the water purifier does not need to be replaced or manually cleaned, and the family expenses are saved; through setting up ultrasonic transducer at tertiary filter device lateral wall, bacterium, the virus of aquatic can be killed to the ultrasonic wave that ultrasonic transducer produced, from this, can disinfect, disinfect to tertiary filter device is inside, prevents its inside germ of breeding.
In some embodiments, the outlet ends of the primary, secondary and tertiary waste pipes are connected to a waste manifold.
Therefore, the wastewater generated by backwashing can be discharged together.
In some embodiments, the first-stage filtering device, the second-stage filtering device and the third-stage filtering device are respectively provided at their peripheries with an ultrasonic wave absorbing material wrapping the first-stage filtering device, the second-stage filtering device and the third-stage filtering device and an ultrasonic transducer attached to the outer side wall thereof.
Therefore, the ultrasonic wave generated by the ultrasonic transducer can be prevented from leaking to cause damage to human bodies.
In some embodiments, the water purifier with automatic backwashing further comprises a shell, one or two or three of the primary filtering device, the secondary filtering device and the tertiary filtering device, the booster pump, the control device and the water storage tank are arranged in the shell, and the inner side wall of the shell is provided with the ultrasonic wave absorbing material.
Therefore, the ultrasonic wave generated by the ultrasonic transducer can be prevented from leaking to cause damage to human bodies.
According to another aspect of the invention, an automatic backwashing method for a water purifier with automatic backwashing is designed, which comprises the following steps:
a. starting a water outlet switch valve, triggering a water flow switch and feeding back information to the control device;
b. the control device controls the stop of the electromagnetic valve on the pipeline connected with the water inlet end of the filtering device and the electromagnetic valve on the pipeline connected with the water inlet end and the water outlet end of the water storage tank;
c. the control device controls the ultrasonic transducer on the outer side wall of the filtering device to start, and ultrasonic waves are carried out on stains attached to the filter element of the filtering device to remove;
d. after the ultrasonic transducer is started for 1-120s, the control device controls the electromagnetic valve on the return pipe and the electromagnetic valve on the waste liquid discharge pipe to be opened and the booster pump to be started, so that the purified water in the water storage tank enters a second chamber of the filtering device through the return pipe and the branch pipe, backflushes into the first chamber through the filter element in the filtering device, and is discharged from the waste liquid pipe;
e. the control device controls the booster pump to start for 10-300s and stop, then controls the electromagnetic valve on the return pipe, the electromagnetic valve on the waste liquid discharge pipe to stop and controls the electromagnetic valve on the pipeline connected with the water inlet end of the filtering device and the electromagnetic valve on the pipeline connected with the water inlet end and the water outlet end of the water storage tank to start, and automatic backwashing is completed;
f. when the back washing is finished once, the water outlet switch valve is opened again to directly discharge purified water, and when the water outlet switch valve is opened again after the purified water is discharged once, the back washing is automatically performed again;
or within 0.1-48h after each time of finishing the back flushing cleaning, the water outlet switch valve is opened again to directly discharge purified water, and when the water outlet switch valve is opened again after the set time is exceeded, the back flushing cleaning is automatically performed again;
or when the water outlet switch valve is opened again for 2-50 times after the back flushing cleaning is finished once, the purified water is directly discharged, and when the water outlet switch valve is opened again for more than the set times, the back flushing cleaning is automatically carried out again.
Drawings
FIG. 1 is a schematic structural diagram of a water purifier with automatic backwashing according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view of a primary filter unit of a water purifier with automatic backwashing;
FIG. 3 is a schematic sectional view of a water storage tank of a water purifier with automatic backwashing;
FIG. 4 is a schematic diagram of a water purifier with automatic backwash according to another embodiment;
FIG. 5 is a schematic structural diagram of a water purifier with automatic backwashing according to still another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 3, the present invention provides a water purifier with automatic backwashing, including: the device comprises a primary filtering device 1, a water storage tank 2, a booster pump 3, an ultrasonic transducer 4, a control device and a shell.
Have one-level filter core 11 in one-level filter equipment 1, one-level filter core 11 is with 1 inside one-level filter equipment divide into one-level first chamber 12 and one-level second chamber 13, is the first chamber 12 of one-level between 11 lateral walls of one-level filter core and 1 inside wall of one-level filter equipment promptly, and 11 inside one-level second chambers 13 that are of one-level filter core.
The primary filtering device 1 is provided with a water inlet end communicated with the primary first cavity 12, a water outlet end communicated with the primary second cavity 13 and a water discharge end communicated with the primary first cavity 12, and the water discharge end is positioned at the lower end of the side wall of the primary filtering device 1.
The water storage tank 2 is provided with a water inlet end, a water return end and a water outlet end which are communicated with the interior of the water storage tank.
The water inlet end of the primary filtering device 1 is connected with a water inlet pipe 14, the water inlet pipe 14 is connected with a first electromagnetic valve 51 and a pressure switch 17 which are electrically connected with a control device, the first electromagnetic valve 51 is a normally open electromagnetic valve, the water outlet end of the primary filtering device 1 is connected with a primary water outlet pipe 15 of which the other end is connected with the water inlet end of the water storage tank 2, the primary water outlet pipe 15 is connected with a second electromagnetic valve 52 which is electrically connected with the control device, the second electromagnetic valve 52 is a normally open electromagnetic valve, the water return end of the water storage tank 2 is connected with a return pipe 21 of which the other end is connected with the water inlet end of the booster pump 3, the return pipe 21 is connected with a third electromagnetic valve 53 which is electrically connected with the control device, the third electromagnetic valve 53 is a normally closed electromagnetic valve, the water outlet end of the booster pump 3 is connected with a first, the first-stage waste liquid pipe 16 is connected with a fourth electromagnetic valve 54 electrically connected with the control device, and the fourth electromagnetic valve 54 is a normally closed electromagnetic valve.
The outer side wall of the primary filtering device 1 is provided with an ultrasonic transducer 4 electrically connected with the control device, and the ultrasonic transducer 4 can be arranged at the bottom of the outer side of the primary filtering device 1 and is provided with one or more ultrasonic transducers; the ultrasonic transducer 4 can be arranged on the outer side wall of the primary filtering device 1, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 may be disposed on one or more of the outer bottom and the outer side wall of the primary filter device 1. In this embodiment, one ultrasonic transducer 4 is preferably provided and is disposed at the bottom of the primary filter device 1.
The outer side wall of the water storage tank 2 is provided with an ultrasonic transducer 4, and the ultrasonic transducer 4 can be arranged at the bottom of the outer side of the water storage tank 2 and is provided with one or more ultrasonic transducers; the ultrasonic transducer 4 can be arranged on the outer side wall of the water storage tank 2, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 can also be arranged on one or more of the outer bottom and the outer side wall of the water storage tank 2. In this embodiment, two ultrasonic transducers 4 are preferably provided and are disposed at the bottom of the water storage tank 2.
The water storage tank 2 is internally provided with a sensor 18 electrically connected with the control device, the sensor 18 is a liquid level sensor or a pressure switch sensor, the water outlet end of the water storage tank 2 is connected with a purified water outlet pipe 22, the other end of the purified water outlet pipe 22 is connected with a water outlet switch valve 8, the purified water outlet pipe 22 is connected with a fifth electromagnetic valve 55 and a water flow switch 81 electrically connected with the control device, the fifth electromagnetic valve 55 is a normally open electromagnetic valve, and when the purified water level in the water storage tank 2 touches the sensor 18, the sensor 18 feeds back information to the control device to control the first electromagnetic valve. In addition, when the water outlet switch valve 8 is forgotten to be closed or is damaged to discharge water all the time, the water flow switch 81 always feeds back information to the control device, and when the time for continuously receiving information set on the control device is exceeded, the control device controls the fifth electromagnetic valve 55 to be cut off, so that the waste of water resources and the loss of a user family are prevented.
The periphery of the primary filtering device 1 is provided with an ultrasonic wave absorbing material 23 which wraps the primary filtering device 1 and the ultrasonic transducer 4 attached to the outer side wall of the primary filtering device.
The periphery of the water storage tank 2 is provided with an ultrasonic wave absorbing material 23 which wraps the water storage tank 2 and the ultrasonic transducer 4 attached to the outer side wall of the water storage tank.
The primary filtering device 1, the booster pump 3, the control device and the water storage tank 2 are arranged in a shell, and the shell is provided with a switch button and a reset button which are electrically connected with the control device.
The control device is a conventional PLC controller or a micro-controller and the like.
In some embodiments, the housing has an automatic back-wash button electrically connected to the control device, whereby back-washing can be achieved by the button.
In some embodiments, no ultrasonic wave absorbing material is disposed on the periphery of the primary filtering device 1, and the ultrasonic wave absorbing material is disposed on the inner side wall of the casing.
In some embodiments, besides the periphery of the primary filtering device 1 is provided with the ultrasonic wave absorbing material 23 wrapping the primary filtering device 1 and the ultrasonic transducer 4 attached to the outer side wall thereof, the inner wall of the shell is also provided with the ultrasonic wave absorbing material. The double-layer ultrasonic wave absorbing material can better prevent ultrasonic wave from leaking.
An automatic backwashing method of a water purifier with automatic backwashing based on embodiment 1 includes the following steps:
a. the water outlet switch valve 8 is opened, the purified water in the water storage tank 2 flows through the water flow switch 81, and the water flow switch 81 is triggered and feeds back information to the control device;
b. the control device controls the first electromagnetic valve 51, the second electromagnetic valve 52 and the fifth electromagnetic valve 55 to be closed;
c. the control device controls the ultrasonic transducer 4 on the outer side wall of the primary filtering device 1 to start, and ultrasonically removes stains attached to the primary filter element 11;
d. after the ultrasonic transducer 4 is started for 1-120s, preferably 10s, the control device controls the third electromagnetic valve 53 and the fourth electromagnetic valve 54 to be opened and the booster pump 3 to be started, so that the purified water in the water storage tank 2 enters the first-stage second chamber 13 through the return pipe 21 and the first branch pipe 25, enters the first-stage first chamber 12 through the back flushing of the first-stage filter element 11, and is then discharged from the first-stage waste liquid pipe 16;
e. the control device controls the booster pump 3 to start for 10-300s and stop, preferably 30s, and then controls the third electromagnetic valve 53 and the fourth electromagnetic valve 54 to stop and the ultrasonic transducer 4 to stop, and controls the first electromagnetic valve 51, the second electromagnetic valve 52 and the fifth electromagnetic valve 55 to open, thereby completing the automatic back flushing.
f. When the backwashing is finished once, the water outlet switch valve 8 is opened again to directly discharge purified water, the automatic cleaning function is not started, and after the purified water is discharged once, the water outlet switch valve 8 is opened again to perform the backwashing automatically again.
In some embodiments, the water outlet switch valve 8 is opened again within 0.1-48h, preferably 24h, after each time of performing the back flushing, the purified water is directly discharged without starting the automatic cleaning function, and the back flushing is automatically performed when the water outlet switch valve 8 is opened again after a set time is exceeded.
In some embodiments, the automatic cleaning function is not started when the purified water is directly discharged by opening the water outlet switch valve 2-50 times, preferably 10 times, every time the back flushing cleaning is completed, and the back flushing cleaning is automatically performed again when the water outlet switch valve is opened again when the number of times exceeds the set number.
Example 2
Referring to fig. 3 and 4, a water purifier with automatic backwashing according to still another embodiment of the present invention includes: the device comprises a primary filtering device 1, a secondary filtering device 6, a water storage tank 2, a booster pump 3, an ultrasonic transducer 4, a control device and a shell.
Have one-level filter core 11 in one-level filter equipment 1, one-level filter core 11 is with 1 inside one-level filter equipment divide into one-level first chamber 12 and one-level second chamber 13, is the first chamber 12 of one-level between 11 lateral walls of one-level filter core and 1 inside wall of one-level filter equipment promptly, and 11 inside one-level second chambers 13 that are of one-level filter core.
The primary filtering device 1 is provided with a water inlet end communicated with the primary first cavity 12, a water outlet end communicated with the primary second cavity 13 and a water discharge end communicated with the primary first cavity 12, and the water discharge end is positioned at the lower end of the side wall of the primary filtering device 1.
The secondary filtering device 6 is provided with a water inlet end communicated with the secondary first cavity, a water outlet end communicated with the secondary second cavity and a water discharge end communicated with the secondary first cavity, and the water discharge end is positioned at the lower end of the side wall of the secondary filtering device 6.
The water storage tank 2 is provided with a water inlet end, a water return end and a water outlet end which are communicated with the interior of the water storage tank.
The water inlet end of the primary filtering device 1 is connected with a water inlet pipe 14, the water inlet pipe 14 is connected with a first electromagnetic valve 51 and a pressure switch 17 which are electrically connected with a control device, the first electromagnetic valve 51 is a normally open electromagnetic valve, the water outlet end of the primary filtering device 1 is connected with a primary water outlet pipe 15 of which the other end is connected with the water inlet end of the secondary filtering device 6, the primary water outlet pipe 15 is connected with a second electromagnetic valve 52 which is electrically connected with the control device, the second electromagnetic valve 52 is a normally open electromagnetic valve, the water outlet end of the secondary filtering device 6 is connected with a secondary water outlet pipe 61 of which the other end is connected with the water inlet end of the water storage tank 2, the secondary water outlet pipe 61 is connected with a sixth electromagnetic valve 56 which is electrically connected with the control device, the sixth electromagnetic valve 56 is a normally open electromagnetic valve, the water return end of, the third electromagnetic valve 53 is a normally closed electromagnetic valve, the water outlet end of the booster pump 3 is connected with a first branch pipe 25 and a second branch pipe 26, the other ends of the first branch pipe 25 and the second branch pipe 26 are respectively connected with the water outlet end of the primary filtering device 1 and the water outlet end of the secondary filtering device 6, the first branch pipe 25 and the second branch pipe 26 are respectively connected with a first check valve 91 and a second check valve 92, the booster pump 3 is electrically connected with the control device, the drainage end of the primary filtering device 1 and the drainage end of the secondary filtering device 6 are respectively connected with a primary waste liquid pipe 16 and a secondary waste liquid pipe 62, the primary waste liquid pipe 16 and the secondary waste liquid pipe 62 are respectively connected with a fourth electromagnetic valve 54 and a seventh electromagnetic valve 57 which are electrically connected with the control device, the fourth electromagnetic valve 54 and the seventh electromagnetic valve 57 are both normally closed electromagnetic valves, and the liquid outlet ends of.
The outer side walls of the primary filtering device 1 and the secondary filtering device 6 are both provided with an ultrasonic transducer 4 electrically connected with the control device, and the ultrasonic transducers 4 can be arranged at the bottom of the outer sides of the primary filtering device 1 and the secondary filtering device 6 and are provided with one or more ultrasonic transducers; the ultrasonic transducers 4 can be arranged on the outer side walls of the primary filtering device 1 and the secondary filtering device 6, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 may be disposed on one or more of the outer bottom and outer side wall of the primary filtering device 1 and the secondary filtering device 6. In this embodiment, the ultrasonic transducers 4 are preferably arranged one by one and at the bottom of the primary filter device 1 and the secondary filter device 6.
The outer side wall of the water storage tank 2 is provided with an ultrasonic transducer 4, and the ultrasonic transducer 4 can be arranged at the bottom of the outer side of the water storage tank 2 and is provided with one or more ultrasonic transducers; the ultrasonic transducer 4 can be arranged on the outer side wall of the water storage tank 2, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 can also be arranged on one or more of the outer bottom and the outer side wall of the water storage tank 2. In this embodiment, two ultrasonic transducers 4 are preferably provided and are disposed at the bottom of the water storage tank 2.
The water storage tank 2 is internally provided with a sensor 18 electrically connected with the control device, the sensor 18 is a liquid level sensor or a pressure switch sensor, the water outlet end of the water storage tank 2 is connected with a purified water outlet pipe 22, the other end of the purified water outlet pipe 22 is connected with a water outlet switch valve 8, the purified water outlet pipe 22 is connected with a fifth electromagnetic valve 55 and a water flow switch 81 electrically connected with the control device, the fifth electromagnetic valve 55 is a normally open electromagnetic valve, and when the purified water level in the water storage tank 2 touches the sensor 18, the sensor 18 feeds back information to the control device to control the first electromagnetic valve. In addition, when the water outlet switch valve 8 is forgotten to be closed or is damaged to discharge water all the time, the water flow switch 81 always feeds back information to the control device, and when the time for continuously receiving information set on the control device is exceeded, the control device controls the fifth electromagnetic valve 55 to be cut off, so that the waste of water resources and the loss of a user family are prevented.
The periphery of the primary filtering device 1 is provided with an ultrasonic wave absorbing material 23 which wraps the primary filtering device 1 and the ultrasonic transducer 4 attached to the outer side wall of the primary filtering device.
The periphery of the secondary filtering device 6 is provided with an ultrasonic wave absorbing material which wraps the secondary filtering device 6 and the ultrasonic transducer 4 attached to the outer side wall of the secondary filtering device.
The periphery of the water storage tank 2 is provided with an ultrasonic wave absorbing material 23 which wraps the water storage tank 2 and the ultrasonic transducer 4 attached to the outer side wall of the water storage tank.
The primary filtering device 1, the secondary filtering device 6, the booster pump 3, the control device and the water storage tank 2 are arranged in a shell, and the shell is provided with a switch button and a reset button which are electrically connected with the control device.
The control device is a conventional PLC controller or a micro-controller and the like.
In some embodiments, the housing has an automatic back-wash button electrically connected to the control device, whereby back-washing can be achieved by the button.
In some embodiments, the first-stage filtering device 1 and the second-stage filtering device 6 are not provided with an ultrasonic wave absorbing material at the periphery, and the ultrasonic wave absorbing material is arranged on the inner side wall of the shell.
In some embodiments, besides the peripheries of the primary filtering device 1 and the secondary filtering device 6, ultrasonic wave absorbing materials wrapping the primary filtering device 1 and the secondary filtering device 6 and the ultrasonic transducers 4 attached to the outer side walls of the primary filtering device and the secondary filtering device are respectively arranged, and the inner wall of the shell is also provided with the ultrasonic wave absorbing materials. The double-layer ultrasonic wave absorbing material can better prevent ultrasonic wave from leaking.
An automatic backwashing method of a water purifier with automatic backwashing based on embodiment 2 includes the following steps:
a. the water outlet switch valve 8 is opened, the purified water in the water storage tank 2 flows through the water flow switch 81, and the water flow switch 81 is triggered and feeds back information to the control device;
b. the control device controls the first electromagnetic valve 51, the second electromagnetic valve 52, the fifth electromagnetic valve 55 and the sixth electromagnetic valve 56 to be closed;
c. the control device controls the ultrasonic transducers 4 on the outer side walls of the primary filtering device 1 and the secondary filtering device 6 to start, and ultrasonically removes stains attached to the primary filter element 11 and the secondary filter element;
d. after the ultrasonic transducer 4 is started for 1-120s, preferably 10s, the control device controls the third electromagnetic valve 53, the fourth electromagnetic valve 54 and the seventh electromagnetic valve 57 to be opened and the booster pump 3 to be started, so that the purified water in the water storage tank 2 respectively enters the primary second chamber 13 and the secondary second chamber through the return pipe 21, the first branch pipe 25 and the second branch pipe 26, respectively enters the primary first chamber 12 and the secondary first chamber through the backflushing of the primary filter element 11 and the secondary filter element, and is then respectively discharged from the primary waste liquid pipe 16 and the secondary waste liquid pipe 62;
e. the control device controls the booster pump 3 to start for 10-300s and stop, preferably 30s, and then controls the third electromagnetic valve 53, the fourth electromagnetic valve 54 and the seventh electromagnetic valve 57 to stop, the ultrasonic transducers 4 on the outer side walls of the primary filtering device 1 and the secondary filtering device 6 to stop, and the first electromagnetic valve 51, the second electromagnetic valve 52, the fifth electromagnetic valve 55 and the sixth electromagnetic valve 56 to open, so as to finish automatic back flushing;
f. when the back washing is finished once, the water outlet switch valve is opened again to directly discharge purified water, the automatic washing function can not be started, and when the water outlet switch valve is opened again after the purified water is discharged once, the back washing is automatically performed again.
In some embodiments, the water outlet switch valve 8 is opened again within 0.1-48h, preferably 24h, after each time of performing the back flushing, the purified water is directly discharged without starting the automatic cleaning function, and the back flushing is automatically performed when the water outlet switch valve 8 is opened again after a set time is exceeded.
In some embodiments, the automatic cleaning function is not started when the purified water is directly discharged by opening the water outlet switch valve 2-50 times, preferably 10 times, every time the back flushing cleaning is completed, and the back flushing cleaning is automatically performed again when the water outlet switch valve is opened again when the number of times exceeds the set number.
Example 3
Referring to fig. 3 and 5, a water purifier with automatic backwashing according to still another embodiment of the present invention includes: the device comprises a primary filtering device 1, a secondary filtering device 6, a tertiary filtering device 7, a water storage tank 2, a booster pump 3, an ultrasonic transducer 4, a control device and a shell.
Have one-level filter core 11 in one-level filter equipment 1, one-level filter core 11 is with 1 inside one-level filter equipment divide into one-level first chamber 12 and one-level second chamber 13, is the first chamber 12 of one-level between 11 lateral walls of one-level filter core and 1 inside wall of one-level filter equipment promptly, and 11 inside one-level second chambers 13 that are of one-level filter core.
The primary filtering device 1 is provided with a water inlet end communicated with the primary first cavity 12, a water outlet end communicated with the primary second cavity 13 and a water discharge end communicated with the primary first cavity 12, and the water discharge end is positioned at the lower end of the side wall of the primary filtering device 1.
The secondary filtering device 6 is provided with a water inlet end communicated with the secondary first cavity, a water outlet end communicated with the secondary second cavity and a water discharge end communicated with the secondary first cavity, and the water discharge end is positioned at the lower end of the side wall of the secondary filtering device 6.
The third-stage filtering device 7 is provided with a water inlet end communicated with the third-stage first cavity, a water outlet end communicated with the third-stage second cavity and a water discharging end communicated with the third-stage first cavity, and the water discharging end is positioned at the lower end of the side wall of the third-stage filtering device 7.
The water storage tank 2 is provided with a water inlet end, a water return end and a water outlet end which are communicated with the interior of the water storage tank.
The water inlet end of the first-stage filtering device 1 is connected with a water inlet pipe 14, the water inlet pipe 14 is connected with a first electromagnetic valve 51 and a pressure switch 17 which are electrically connected with a control device, the first electromagnetic valve 51 is a normally open electromagnetic valve, the water outlet end of the first-stage filtering device 1 is connected with a first-stage water outlet pipe 15 of which the other end is connected with the water inlet end of the second-stage filtering device 6, the first-stage water outlet pipe 15 is connected with a second electromagnetic valve 52 which is electrically connected with the control device, the second electromagnetic valve 52 is a normally open electromagnetic valve, the water outlet end of the second-stage filtering device 6 is connected with a second-stage water outlet pipe 61 of which the other end is connected with the water inlet end of the third-stage filtering device 7, the second-stage water outlet pipe 61 is connected with a sixth electromagnetic valve 56 which is electrically connected with the control device, the sixth electromagnetic valve 56, the eighth electromagnetic valve 58 is a normally open electromagnetic valve, the water return end of the water storage tank 2 is connected with a return pipe 21 with the other end connected with the water inlet end of the booster pump 3, the return pipe 21 is connected with a third electromagnetic valve 53 electrically connected with the control device, the third electromagnetic valve 53 is a normally closed electromagnetic valve, the water outlet end of the booster pump 3 is connected with a first branch pipe 25, a second branch pipe 26 and a third branch pipe 27 with the other ends respectively connected with the water outlet end of the primary filtering device 1, the water outlet end of the secondary filtering device 6 and the water outlet end of the tertiary filtering device 7, the first branch pipe 25, the second branch pipe 26 and the third branch pipe 27 are respectively connected with a first check valve 91, a second check valve 92 and a third check valve 92, the booster pump 3 is electrically connected with the control device, the water discharge end of the primary filtering device 1, the water discharge end of the secondary filtering device 6 and the water discharge end of the tertiary filtering device 7 are respectively connected with a primary, the first-stage waste liquid pipe 16, the second-stage waste liquid pipe 62 and the third-stage waste liquid pipe 72 are respectively connected with a fourth electromagnetic valve 54, a seventh electromagnetic valve 57 and a ninth electromagnetic valve 59 which are electrically connected with the control device, the fourth electromagnetic valve 54, the seventh electromagnetic valve 57 and the ninth electromagnetic valve 59 are all normally closed electromagnetic valves, and the liquid outlet ends of the first-stage waste liquid pipe 16, the second-stage waste liquid pipe 62 and the third-stage waste liquid pipe 72 are connected with a waste liquid main pipe 63.
The outer side walls of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7 are all provided with ultrasonic transducers 4 electrically connected with the control device, and the ultrasonic transducers 4 can be arranged at the bottoms of the outer sides of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7 and are provided with one or more ultrasonic transducers; the ultrasonic transducers 4 can be arranged on the outer side walls of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 can also be arranged on one or more of the outer bottom and the outer side wall of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7. In the present embodiment, the ultrasonic transducers 4 are preferably disposed one by one and at the bottom of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7.
The outer side wall of the water storage tank 2 is provided with an ultrasonic transducer 4, and the ultrasonic transducer 4 can be arranged at the bottom of the outer side of the water storage tank 2 and is provided with one or more ultrasonic transducers; the ultrasonic transducer 4 can be arranged on the outer side wall of the water storage tank 2, and one or more ultrasonic transducers are arranged; the ultrasonic transducer 4 can also be arranged on one or more of the outer bottom and the outer side wall of the water storage tank 2. In this embodiment, two ultrasonic transducers 4 are preferably provided and are disposed at the bottom of the water storage tank 2.
The water storage tank 2 is internally provided with a sensor 18 electrically connected with the control device, the sensor 18 is a liquid level sensor or a pressure switch sensor, the water outlet end of the water storage tank 2 is connected with a purified water outlet pipe 22, the other end of the purified water outlet pipe 22 is connected with a water outlet switch valve 8, the purified water outlet pipe 22 is connected with a fifth electromagnetic valve 55 and a water flow switch 81 electrically connected with the control device, the fifth electromagnetic valve 55 is a normally open electromagnetic valve, and when the purified water level in the water storage tank 2 touches the sensor 18, the sensor 18 feeds back information to the control device to control the first electromagnetic valve. In addition, when the water outlet switch valve 8 is forgotten to be closed or is damaged to discharge water all the time, the water flow switch 81 always feeds back information to the control device, and when the time for continuously receiving information set on the control device is exceeded, the control device controls the fifth electromagnetic valve 55 to be cut off, so that the waste of water resources and the loss of a user family are prevented.
The periphery of the primary filtering device 1 is provided with an ultrasonic wave absorbing material 23 which wraps the primary filtering device 1 and the ultrasonic transducer 4 attached to the outer side wall of the primary filtering device.
The periphery of the secondary filtering device 6 is provided with an ultrasonic wave absorbing material which wraps the secondary filtering device 6 and the ultrasonic transducer 4 attached to the outer side wall of the secondary filtering device.
The periphery of the third filtering device 7 is provided with an ultrasonic wave absorbing material which wraps the third filtering device 7 and the ultrasonic transducer 4 attached to the outer side wall of the third filtering device.
The periphery of the water storage tank 2 is provided with an ultrasonic wave absorbing material 23 which wraps the water storage tank 2 and the ultrasonic transducer 4 attached to the outer side wall of the water storage tank.
The primary filtering device 1, the secondary filtering device 6, the tertiary filtering device 7, the booster pump 3, the control device and the water storage tank 2 are arranged in a shell, and the shell is provided with a switch button and a reset button which are electrically connected with the control device.
The control device is a conventional PLC controller or a micro-controller and the like.
In some embodiments, a fourth-stage filtering device, a fifth-stage filtering device or more may be further provided, and the pipeline connection of the fourth-stage filtering device and the fifth-stage filtering device is similar to the connection of the third-stage filtering device after the third-stage filtering device, which is not described herein in detail.
In some embodiments, the housing has an automatic back-wash button electrically connected to the control device, whereby back-washing can be achieved by the button.
In some embodiments, no ultrasonic wave absorbing material is disposed on the periphery of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7, and the ultrasonic wave absorbing material is disposed on the inner side wall of the shell.
In some embodiments, except for the first-stage filtering device 1, the second-stage filtering device 6 and the third-stage filtering device 7, the ultrasonic wave absorbing material wrapping the first-stage filtering device 1, the second-stage filtering device 6 and the third-stage filtering device 7 and the ultrasonic transducer 4 attached to the outer side wall of the first-stage filtering device, the ultrasonic wave absorbing material is also arranged on the inner side wall of the shell. The double-layer ultrasonic wave absorbing material can better prevent ultrasonic wave from leaking.
An automatic backwashing method of a water purifier with automatic backwashing based on embodiment 3 includes the following steps:
a. the water outlet switch valve 8 is opened, the purified water in the water storage tank 2 flows through the water flow switch 81, and the water flow switch 81 is triggered and feeds back information to the control device;
b. the control device controls the first electromagnetic valve 51, the second electromagnetic valve 52, the fifth electromagnetic valve 55, the sixth electromagnetic valve 56 and the eighth electromagnetic valve 58 to be closed;
c. the control device controls the ultrasonic transducers 4 on the outer side walls of the primary filtering device 1, the secondary filtering device 6 and the tertiary filtering device 7 to be started, and ultrasonic waves are carried out on stains attached to the primary filter element 11, the secondary filter element and the tertiary filter element to be removed;
d. after the ultrasonic transducer 4 is started for 1-120s, preferably 10s, the control device controls the third electromagnetic valve 53, the fourth electromagnetic valve 54, the seventh electromagnetic valve 57 and the ninth electromagnetic valve 59 to be opened and the booster pump 3 to be started, so that the purified water in the water storage tank 2 respectively enters the first-stage second chamber 13, the second-stage second chamber and the third-stage second chamber through the return pipe 21, the first branch pipe 25, the second branch pipe 26 and the third branch pipe 27, respectively enters the first-stage first chamber 12, the second-stage first chamber and the third-stage first chamber through the first-stage filter element 11, the second-stage filter element and the third-stage third filter element, respectively, and then is discharged from the first-stage waste liquid pipe 16, the second-stage waste liquid pipe 62 and the third-stage waste liquid pipe 72;
e. the control device controls the booster pump 3 to start for 10-300s and stop, preferably 30s, and then controls the third electromagnetic valve 53, the fourth electromagnetic valve 54, the seventh electromagnetic valve 57 and the ninth electromagnetic valve 59 to be stopped, and controls the ultrasonic transducer 4 on the outer side walls of the first-stage filtering device 1, the second-stage filtering device 6 and the third-stage filtering device 7 to be stopped, and the first electromagnetic valve 51, the second electromagnetic valve 52, the fifth electromagnetic valve 55, the sixth electromagnetic valve 56 and the eighth electromagnetic valve 58 to be opened, so that the automatic back flushing is completed;
f. when the back washing is finished once, the water outlet switch valve is opened again to directly discharge purified water, the automatic washing function can not be started, and when the water outlet switch valve is opened again after the purified water is discharged once, the back washing is automatically performed again.
In some embodiments, the water outlet switch valve 8 is opened again within 0.1-48h, preferably 24h, after each time of performing the back flushing, the purified water is directly discharged without starting the automatic cleaning function, and the back flushing is automatically performed when the water outlet switch valve 8 is opened again after a set time is exceeded.
In some embodiments, the automatic cleaning function is not started when the purified water is directly discharged by opening the water outlet switch valve 2-50 times, preferably 10 times, every time the back flushing cleaning is completed, and the back flushing cleaning is automatically performed again when the water outlet switch valve is opened again when the number of times exceeds the set number.
The above description is only for the embodiments of the present invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A water purifier with automatic backwashing function is characterized by comprising: one-level filter device (1), storage water tank (2), booster pump (3), ultrasonic transducer (4) and controlling means, one-level filter core (11) have in one-level filter device (1), one-level filter core (11) divide into one-level first cavity (12) and one-level second cavity (13) with one-level filter device (1) inside, one-level filter device (1) income water end is connected with oral siphon (14), be connected with first solenoid valve (51) on oral siphon (14), one-level filter device (1) play water end is connected with one-level outlet pipe (15) that the other end is connected with storage water tank (2) income water end, be connected with second solenoid valve (52) on one-level outlet pipe (15), storage water tank (2) return water end is connected with back flow (21) that the other end is connected with booster pump (3) income water end, is connected with third solenoid valve (53) on back flow (21), the water outlet end of the booster pump (3) is connected with a first branch pipe (25) connected with the water outlet end of the other end and the primary filtering device (1), the drainage end of the primary filtering device (1) is connected with a primary waste liquid pipe (16), the primary waste liquid pipe (16) is connected with a fourth electromagnetic valve (54), the outer side wall of the primary filtering device (1) is provided with an ultrasonic transducer (4), and the ultrasonic transducer (4), the booster pump (3), the first electromagnetic valve (51), the second electromagnetic valve (52), the third electromagnetic valve (53) and the fourth electromagnetic valve (54) are electrically connected with the control device.
2. The water purifier with automatic back flush according to claim 1, characterized in that the outer side wall of the water storage tank (2) is provided with an ultrasonic transducer (4).
3. The water purifier with automatic back flush according to claim 2, wherein the water inlet pipe (14) is connected with a pressure switch (17) electrically connected with the control device, and the water storage tank (2) is internally provided with a sensor (18) electrically connected with the control device.
4. The water purifier with automatic back flush according to claim 3, wherein the water outlet end of the water storage tank (2) is connected with a purified water outlet pipe (22), the other end of the purified water outlet pipe (22) is connected with a water outlet switch valve (8), and the purified water outlet pipe (22) is connected with a fifth electromagnetic valve (55) and a water flow switch (81) which are electrically connected with the control device.
5. The water purifier with automatic back flushing according to claim 4, further comprising a secondary filtering device (6), wherein the secondary filtering device (6) has a secondary filter element therein, the secondary filter element divides the interior of the secondary filtering device (6) into a secondary first chamber and a secondary second chamber, the primary water outlet pipe (15) is connected with the water inlet end of the secondary filtering device (6), the water outlet end of the secondary filtering device (6) is connected with a secondary water outlet pipe (61) with the other end connected with the water inlet end of the water storage tank (2), the secondary water outlet pipe (61) is connected with a sixth electromagnetic valve (56), the water outlet end of the booster pump (3) is connected with a second branch pipe (26) with the other end connected with the water outlet end of the secondary filtering device (6), and the first branch pipe (25) and the second branch pipe (26) are respectively connected with a first one-way valve (91), The second check valve (92), the second grade filter equipment (6) drainage end is connected with second grade waste liquid pipe (62), be connected with seventh solenoid valve (57) on second grade waste liquid pipe (62), second grade filter equipment (6) lateral wall is provided with ultrasonic transducer, ultrasonic transducer on sixth solenoid valve (56), seventh solenoid valve (57) and second grade filter equipment (6) lateral wall is connected with the controlling means electricity.
6. The water purifier with automatic back flushing according to claim 5, further comprising a third stage filtering device (7), wherein the third stage filtering device (7) has a third stage filter element therein, the third stage filter element divides the interior of the third stage filtering device (6) into a third stage first chamber and a third stage second chamber, the second stage water outlet pipe (61) is connected with the water inlet end of the third stage filtering device (7), the water outlet end of the third stage filtering device (7) is connected with a third stage water outlet pipe (71) with the other end connected with the water inlet end of the water storage tank (2), the third stage water outlet pipe (71) is connected with an eighth solenoid valve (58), the water outlet end of the booster pump (3) is connected with a third branch pipe (27) with the other end connected with the water outlet end of the third stage filtering device (7), the third branch pipe is connected with a third one-way valve (93), the water outlet end of the third stage filtering device (7) is connected with a, be connected with ninth solenoid valve (59) on tertiary waste liquid pipe (72), tertiary filter equipment (7) lateral wall is provided with ultrasonic transducer, ultrasonic transducer on eighth solenoid valve (58), ninth solenoid valve (59) and tertiary filter equipment (7) lateral wall is connected with controlling means electricity.
7. The water purifier with automatic back flushing according to claim 6, wherein the outlet ends of the primary waste pipe (16), the secondary waste pipe (62) and the tertiary waste pipe (72) are connected to a waste header pipe (63).
8. The water purifier with automatic back flushing according to claim 6, wherein the primary filtering device (1), the secondary filtering device (6) and the tertiary filtering device (7) are respectively provided with an ultrasonic wave absorbing material (23) wrapping the primary filtering device (1), the secondary filtering device (6) and the tertiary filtering device (7) and the ultrasonic transducer (4) attached to the outer side wall thereof.
9. The water purifier with automatic back flushing according to claim 6, further comprising a housing, wherein one or two or three of the primary filtering device (1), the secondary filtering device (6) and the tertiary filtering device (7) and the booster pump (3), the control device and the water storage tank (2) are arranged in the housing, and an ultrasonic wave absorbing material is arranged on the inner side wall of the housing.
10. A method for realizing automatic back flushing of a water purifier based on the automatic back flushing water purifier as claimed in any one of claims 4 to 9, comprising the following steps:
a. the water outlet switch valve (8) is opened, and the water flow switch (81) is triggered and feeds back information to the control device;
b. the control device controls the electromagnetic valve on the pipeline connected with the water inlet end of the filtering device and the electromagnetic valve on the pipeline connected with the water inlet end and the water outlet end of the water storage tank (2) to be cut off;
c. the control device controls an ultrasonic transducer (4) on the outer side wall of the filtering device to start, and ultrasonic waves are carried out on stains attached to a filter element of the filtering device to remove;
d. after the ultrasonic transducer (4) is started for 1-120s, the control device controls the electromagnetic valve on the return pipe (21) and the electromagnetic valve on the waste liquid discharge pipe to be opened and the booster pump (3) to be started, so that the purified water in the water storage tank (2) enters the second cavity of the filtering device through the return pipe (21) and the branch pipe, and enters the first cavity through the filter element in the filtering device in a backflushing manner, and then is discharged from the waste liquid pipe;
e. the control device controls the booster pump (3) to start for 10-300s and stop, then controls the electromagnetic valve on the return pipe (21), the electromagnetic valve on the waste liquid discharge pipe to stop and controls the ultrasonic transducer (4) to stop, controls the electromagnetic valve on the pipeline connected with the water inlet end of the filtering device and the electromagnetic valve on the pipeline connected with the water inlet end and the water outlet end of the water storage tank (2) to start, and completes automatic back flushing;
f. when the backwashing is finished once, the water outlet switch valve (8) is opened again to directly discharge purified water, and when the water outlet switch valve (8) is opened again after the purified water is discharged once, the backwashing is automatically carried out again;
or within 0.1-48h after each time of finishing the back flushing cleaning, the water outlet switch valve (8) is opened again to directly discharge purified water, and when the set time is exceeded and the water outlet switch valve (8) is opened again, the back flushing cleaning is automatically performed again;
or when the water outlet switch valve (8) is opened again for 2-50 times after the back flushing cleaning is finished once, the purified water is directly discharged, and when the water outlet switch valve (8) is opened again for more than the set times, the back flushing cleaning is automatically performed again.
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