CN108002461B - Water filtration system and control method thereof - Google Patents
Water filtration system and control method thereof Download PDFInfo
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- CN108002461B CN108002461B CN201611271108.XA CN201611271108A CN108002461B CN 108002461 B CN108002461 B CN 108002461B CN 201611271108 A CN201611271108 A CN 201611271108A CN 108002461 B CN108002461 B CN 108002461B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000001914 filtration Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002351 wastewater Substances 0.000 claims abstract description 191
- 239000002699 waste material Substances 0.000 claims abstract description 79
- 239000008213 purified water Substances 0.000 claims abstract description 6
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 17
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/157—Flow control valves: Damping or calibrated passages
- B01D35/1573—Flow control valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Abstract
The invention discloses a water filtering system and a control method thereof, wherein the water filtering system comprises a filter element with a raw water inlet, a purified water outlet and a waste water outlet, and further comprises: a flow meter for detecting the flow of the waste outlet; and a waste valve provided at the waste outlet and controlling an opening of the waste valve according to a detected flow rate of the waste outlet by the flowmeter to maintain a constant flow rate of the waste outlet. The invention adopts the waste water valve capable of adjusting the waste water flow at the waste water discharge port, and the flowmeter for detecting the waste water outlet flow, and ensures the constant flow at the waste water outlet by adjusting the opening of the waste water valve through the flowmeter, thereby effectively avoiding the reduction of the actual flow of the waste water valve caused by scaling in the use process and ensuring the normal operation of the water filtering system.
Description
Technical Field
The invention relates to the field of liquid filtration, in particular to a water filtration system and a control method thereof.
Background
In the existing water filtration system, the opening of the waste water valve on the waste water pipeline is usually unchanged, as the service time passes, due to the poor quality of waste water in the waste water pipeline, scaling can be gradually carried out at the waste water valve, so that the actual flow of the waste water valve is reduced, and the longer the time, the more scaling is, the smaller the actual waste water flow of the waste water valve is, and finally the service life of the water filtration system is quickly attenuated until scrapped.
Disclosure of Invention
The main purpose of the invention is to provide a water filtration system, which aims at avoiding the reduction of the waste water flow caused by the blockage of a waste water valve.
In order to achieve the above object, the present invention provides a water filtration system, which includes a filter element having a raw water inlet, a purified water outlet, and a waste water outlet, and further includes: a flow meter for detecting the flow of the waste outlet; and a waste valve provided at the waste outlet, and controlling an opening of the waste valve according to a detected flow rate of the waste outlet by the flowmeter to maintain a constant flow rate of the waste outlet.
Preferably, the water filtration system further comprises: the pressure sensor is used for detecting the pressure of the raw water inlet; and the first alarm module is used for sending out first alarm information when the pressure of the raw water inlet is larger than a first preset pressure value.
Preferably, the water filtration system further comprises: and the control device is electrically connected with the flowmeter and the waste water valve so as to control the opening degree of the waste water valve according to the flow rate of the waste water outlet detected by the flowmeter.
Preferably, the control device includes: and the delay module is used for controlling the waste water valve by the control device after the water filtering system is started for a first preset time.
Preferably, the control device further includes: the control device is used for controlling the waste water valve to increase the opening degree after detecting that the flow of the waste water outlet is smaller than a first preset flow; controlling the waste water valve to reduce the opening after detecting that the flow of the waste water outlet is larger than a second preset flow; wherein the second preset flow is greater than or equal to the first preset flow.
Preferably, the control device further includes: the second alarm module is used for sending out second alarm information after the control device controls the waste water valve to increase the opening degree and still detects that the flow of the waste water outlet is smaller than the first preset flow after the second preset time.
The invention also provides a control method of the water filtering system, which comprises the following steps: detecting the flow of the waste outlet; and controlling the opening of a waste valve arranged at the waste outlet according to the flow rate of the waste outlet so as to maintain the constant flow rate of the waste outlet.
Preferably, the water filtration system further comprises: detecting the pressure of a raw water inlet; and when the pressure of the raw water inlet is larger than a first preset pressure value, sending out first alarm information.
Preferably, before the step of detecting the flow rate of the waste outlet, further comprises: the water filtration system is started and then delayed for a first preset time.
Preferably, the step of controlling the opening of the waste valve provided at the waste outlet according to the flow rate of the waste outlet so that the flow rate of the waste outlet is constant comprises: after detecting that the flow of the waste water outlet is smaller than a first preset flow, controlling the waste water valve to increase the opening; controlling the waste water valve to reduce the opening after detecting that the flow of the waste water outlet is larger than a second preset flow; wherein the second preset flow is greater than the first preset flow.
Preferably, after the step of controlling the waste valve to increase the opening degree after detecting that the flow rate of the waste outlet is smaller than the first preset flow rate, the method further comprises: and after the second preset time still detects that the flow of the waste water outlet is smaller than the first preset flow, sending out second alarm information.
According to the technical scheme, the waste water valve capable of adjusting the waste water flow at the waste water discharge port is arranged, the flowmeter for detecting the waste water outlet flow is arranged, and the opening degree of the waste water valve is adjusted through the flowmeter to ensure the constant flow of the waste water outlet. By the scheme, the problem that the waste water discharged from the waste water outlet is blocked by scaling of the waste water valve, so that the actual flow of the waste water valve is reduced is effectively avoided, and the normal operation of the water filtering system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a water filtration system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of functional modules of the present invention;
FIG. 3 is a flow chart of an embodiment of a control method of the water filtration system of the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Pressure pump | 52 | Water purifying pipeline |
| 20 | Filter element | 53 | Raw water pipeline |
| 30 | Waste water valve | 60 | Control device |
| 40 | Flowmeter for measuring flow rate | 70 | Delay module |
| 50 | Pipeline | ||
| 51 | Waste water pipeline |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a water filtration system.
In an embodiment of the present invention, as shown in fig. 1, the water filtration system includes a filter cartridge 20 having a raw water inlet (not shown), a purified water outlet (not shown), and a waste outlet (not shown), and further includes: a flow meter 40 for detecting the flow of the waste outlet; and a waste valve 30 provided at the waste outlet, and controlling an opening of the waste valve 30 according to a detected flow rate of the waste outlet by the flowmeter 40 to maintain a constant flow rate of the waste outlet.
Specifically, a waste water pipe 51 connected to the filter element 20 is provided at the waste water outlet, the flowmeter 40 and the waste water valve 40 are mounted on the waste water pipe 51, the flowmeter 40 is used for detecting the flow of waste water in the waste water pipe 51, and the waste water valve 30 is used for controlling the flow of waste water in the waste water pipe 51. By setting a preset wastewater flow, such as 1000mL/min, when the flowmeter 40 detects that the wastewater flow is greater than 1000mL/min, the wastewater valve 30 reduces the opening of the wastewater valve to reduce the wastewater flow to 1000mL/min; when the flowmeter 40 detects that the wastewater flow is smaller than 1000mL/min, the wastewater valve 40 increases the opening of the wastewater valve to increase the wastewater flow to 1000mL/min, and through the feedback type adjustment, the wastewater flow in the wastewater pipeline 51 is kept constant and maintained at 1000mL/min. Wherein, preset waste water flow is adjustable, adjusts the size of preset waste water flow according to the condition of quality of water. Wherein, the adjustment of the waste water valve 30 may be immediate, that is, as long as the flow meter 40 detects that the waste water flow in the waste water pipeline 51 is greater than or less than the preset waste water flow, the waste water valve 30 immediately adjusts the opening thereof correspondingly smaller or larger, so as to ensure that the waste water flow in the waste water pipeline 51 is maintained at the preset waste water flow; the adjustment of the waste water valve 30 may also be intermittent, i.e. a preset range value is set in which the waste water flow fluctuates up and down, and when the waste water flow value detected by the flow meter 40 is within the preset range value, the opening of the waste water valve 30 is kept unchanged, and only when the waste water flow detected by the flow meter 40 exceeds the preset range value, the opening of the waste water valve 30 is correspondingly increased or decreased, so that the flow of the waste water pipeline 51 is within the preset range value. Therefore, maintaining the flow of the waste outlet constant is not only intended to be constant at a constant value, but may also be constant within a reasonable range.
In this embodiment, the water filtration system further includes a pressure pump 10, and the pressure pump 10 is communicated with the filter element 20 through the raw water purifying port, so as to increase the water pressure at the raw water inlet, which is beneficial to the filtration of raw water by the water filtration system. The devices in the water filtration system are all connected by a pipeline 50, wherein a raw water pipeline 53 is connected with the pressure pump 10 and the raw water inlet, and a purified water pipeline 52 is connected with the purified water outlet.
Further, the water filtering system further comprises a pressure sensor, wherein the pressure sensor is used for detecting the pressure of the raw water inlet; and the first alarm module is used for sending out first alarm information when the pressure of the raw water inlet is larger than a first preset pressure value. Over time, the filter cartridge 20 will degrade in performance and become clogged later during prolonged use of the water filtration system. When the filter cartridge 20 is clogged, the pressure of the raw water inlet is increased, damage to the pressure pump 10 and other devices of the water filtration system is easily caused, and there is a safety hazard. Of course, the pressure of the raw water inlet is too high due to other reasons. Through setting up a pressure sensor that is used for detecting raw water inlet department pressure, when the pressure value that raw water inlet goes out like this exceeds certain pressure back, first alarm module will send alarm information to suggestion user is handled soon, avoids causing the incident. The alarm information can be sound, light, electric signal, etc.
Further, as shown in fig. 2, the water filtration system further includes a control device 60, and the control device 60 is electrically connected to the flow meter 40 and the waste valve 30 to control the opening of the waste valve 30 according to the flow rate of the waste outlet detected by the flow meter 40. In this embodiment, the waste water valve 30 is an adjustable electromagnetic valve, and the flow rate of the waste water pipeline 51 can be adjusted by steplessly adjusting the opening degree of the waste water valve. When the water filtration system is operated, the control device 60 detects the flow meter 40, determines whether the opening of the waste water valve 30 should be increased or decreased or maintained based on the detected value of the flow meter 40, and then adjusts the waste water valve 30 based on the determination result. Of course, the waste water valve 30 and the flowmeter 40 may be directly electrically connected, and the waste water valve 30 directly receives the electric signal of the flowmeter 40 to adjust the opening degree of the waste water valve.
Also, a storage module may be provided in the control device 60, and a water quality detector (not shown) may be provided at the raw water inlet to detect the water quality at the raw water inlet. The above has explained that the preset wastewater flow is changed according to the change of the water quality, the water quality-preset wastewater flow comparison table is stored in the storage module, the water quality at the raw water inlet is detected by the water quality detector, and then the control device 60 obtains the preset wastewater flow corresponding to the water quality at the raw water inlet through the storage module, so that the control device 60 can control the opening of the wastewater valve 30 according to the preset wastewater flow in combination with the flowmeter 40. Through the arrangement, the water filtering system can be more intelligent and automatic, and the working efficiency is higher. Of course, the control device 60 may be turned off to directly perform manual adjustment of the waste water valve 30.
Further, as shown in fig. 2, the control device 60 includes a delay module 70, and the delay module 70 is used for controlling the waste water valve 30 by the control device 60 after the water filtration system is started for a first preset time. The first preset time refers to the time when the water filtration system reaches a stable working state after being started, and the wastewater flow rate should be stable. By providing such a delay module, the control device 60 will not begin to adjust the waste water valve 30 in accordance with the flow meter 40 until a first predetermined time has elapsed. When the waste water outlet is started, the flow rate of the waste water outlet is a process from small to stable, the flow rate change is large in the first preset time, and if the waste water valve 30 is regulated in the first preset time, the regulating range of the waste water valve 30 is large, so that the waste water valve 30 is easy to damage. Wherein the waste water valve 30 is in an open state when the water system is started.
Preferably, the control device 60 is configured to control the waste valve 30 to increase the opening after detecting that the flow rate of the waste outlet is less than the first preset flow rate; after detecting that the flow rate of the waste outlet is greater than the second preset flow rate, controlling the waste valve 30 to reduce the opening; wherein the second preset flow is greater than or equal to the first preset flow. The first preset flow rate and the second preset flow rate are not constant values, and are changed along with the change of the preset wastewater flow rate, and the first preset flow rate and the second preset flow rate correspond to the preset wastewater flow rate. Wherein the first preset flow is smaller than the preset wastewater flow, and the second preset flow is larger than the preset wastewater amount. When the flow rate of the wastewater detected by the flow meter 40 in real time is within the first preset flow rate and the second preset flow rate range, the opening degree of the wastewater valve 30 is kept unchanged; when the flowmeter 40 detects that the wastewater flow is smaller than the first preset flow, the control device 60 controls the wastewater valve 30 to increase the opening of the wastewater valve to increase the wastewater flow to the preset wastewater flow; when the flow meter 40 detects that the wastewater flow rate is greater than the second preset flow rate, the control device 60 controls the wastewater valve 30 to decrease the opening thereof to decrease the wastewater flow rate to the preset wastewater flow rate. The storage module also stores a first preset flow and a second preset flow corresponding to different preset wastewater flows.
Further, the control device 60 further includes: and the second alarm module is used for sending out second alarm information after the control device 60 controls the waste valve 30 to increase the opening, and the flow of the waste outlet is still detected to be smaller than the first preset flow after the second preset time. The second alarm module and the first alarm module may be the same alarm device or different alarm devices, but the alarm information sent by the second alarm module and the first alarm module should be different, so as to be convenient for distinguishing, such as light without color, different alarm sounds, different electric signals, etc. Through setting up second alarm module, adjust the aperture of big waste water valve 30 after detecting that waste water flow is less than first default flow, again advance the second and predetermine time, the waste water flow of detection still is less than first default flow, this just indicates that water filtration system work breaks down, probably pump pressure is insufficient, filter core 20 blocks up etc. sends alarm information through second alarm module, reminds the user to in time inspect.
The invention also provides a control method of the water filtering system.
In one embodiment of the present invention, as shown in fig. 3, the control method of the water filtration system comprises the steps of:
step S10: detecting the flow of the waste outlet;
step S20: the opening of a waste valve arranged at the waste outlet is controlled according to the flow rate of the waste outlet so as to maintain the constant flow rate of the waste outlet.
Setting a preset wastewater flow value, such as 1000mL/min, and when the flowmeter detects that the wastewater flow is greater than 1000mL/min, reducing the opening of the wastewater valve to reduce the wastewater flow to 1000mL/min; when the flowmeter detects that the wastewater flow is smaller than 1000mL/min, the wastewater valve is used for adjusting the opening degree of the wastewater valve to increase the wastewater flow to 1000mL/min, and through the feedback type adjustment, the wastewater flow in the wastewater pipeline is ensured to be kept constant and maintained at 1000mL/min. Wherein, the preset waste water flow value can be adjusted, and the size of the preset flow value is adjusted according to the water quality condition. The adjustment of the waste water valve can be immediate, namely, as long as the flowmeter detects that the waste water flow in the waste water pipeline is larger or smaller than a preset flow value, the waste water valve immediately and correspondingly reduces or increases the opening of the waste water valve, so that the waste water flow in the waste water pipeline is maintained at the preset waste water flow; the waste water valve can be adjusted intermittently, namely, a preset range of up-and-down fluctuation of a preset waste water flow value is set, when the waste water flow value detected by the flowmeter is within the preset range value, the opening of the waste water valve is kept unchanged, and only when the waste water flow detected by the flowmeter exceeds the preset range value, the opening of the waste water valve can be correspondingly increased or reduced, so that the flow of the waste water pipeline is within the preset range value. Therefore, maintaining the flow of the waste outlet constant is not only intended to be constant at a constant value, but may also be constant within a reasonable range.
In this embodiment, further comprising: detecting the pressure of a raw water inlet; and when the pressure of the raw water inlet is larger than a first preset pressure value, sending out first alarm information.
During the long-term use of the water filtration system, the performance of the filter element is reduced along with the time, and the filter element is easily blocked at a later stage. When the filter element is blocked, the pressure of the raw water inlet is increased continuously, so that the pressure pump and other devices of the water filtering system are damaged easily, and potential safety hazards can exist. Through detecting the pressure of raw water inlet, after the pressure value that raw water inlet goes out exceeds certain pressure, first alarm module will send alarm information to suggestion user is handled soon, avoids causing the incident. The alarm information can be sound, light, electric signal, etc.
In this embodiment, the step of detecting the flow of the waste outlet further comprises, prior to: the water filtration system is started and then delayed for a first preset time.
The first preset time refers to the time when the water filtration system reaches a stable working state after being started, and the wastewater flow rate should be stable. When the waste water outlet is started, the flow of the waste water outlet is a process from small to stable, the flow change is larger in the first preset time, and if the waste water valve is regulated in the first preset time, the regulating amplitude of the waste water valve is large, so that the waste water valve is easy to damage. Wherein the waste water valve is in an open state when the water system is started.
In this embodiment, the step of controlling the opening of the waste valve provided in the waste outlet according to the flow rate of the waste outlet so that the flow rate of the waste outlet is constant specifically includes:
after detecting that the flow of the waste water outlet is smaller than a first preset flow, controlling a waste water valve to increase the opening;
controlling the waste valve to reduce the opening after detecting that the flow of the waste outlet is larger than the second preset flow;
wherein the second preset flow is greater than the first preset flow.
The first preset flow rate and the second preset flow rate are not constant values, and are changed along with the change of the preset wastewater flow rate, and the first preset flow rate and the second preset flow rate correspond to the preset wastewater flow rate. Wherein the first preset flow is smaller than the preset wastewater flow, and the second preset flow is larger than the preset wastewater amount. When the waste water flow detected by the flowmeter in real time is in the first preset flow and the second preset flow range, the opening of the waste water valve is kept unchanged; when the flowmeter detects that the wastewater flow is smaller than the first preset flow, the control device controls the wastewater valve to increase the opening of the wastewater valve, so that the wastewater flow is increased to the preset wastewater flow; when the flowmeter detects that the wastewater flow is greater than the second preset flow, the control device controls the wastewater valve to reduce the opening of the wastewater valve, so that the wastewater flow is reduced to the preset wastewater flow.
In this embodiment, after detecting that the flow rate of the waste outlet is less than the first preset flow rate, the step of controlling the waste valve to increase the opening degree further includes: and after the second preset time still detects that the flow of the waste outlet is smaller than the first preset flow, sending out second alarm information.
After detecting that the wastewater flow is smaller than the first preset flow, the opening of the wastewater valve is enlarged, the second preset time is shortened, and the detected wastewater flow is still smaller than the first preset flow, so that the water filtering system works, and the water filtering system is indicated to be faulty, possibly insufficient in pump pressure, blocked in filter core and the like, and the user is reminded of checking in time by sending out second alarm information.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (7)
1. A water filtration system comprising a filter cartridge having a raw water inlet, a purified water outlet, and a waste outlet, further comprising:
a flow meter for detecting the flow of the waste outlet; and
a waste valve provided at the waste outlet and controlling an opening of the waste valve according to a detected flow rate of the waste outlet by the flowmeter to maintain a constant flow rate of the waste outlet;
the water filtration system further comprises:
a control device electrically connected to the flow meter and the waste valve to control the opening of the waste valve based on the flow rate detected by the flow meter at the waste outlet;
the control device includes:
the delay module is used for controlling the waste water valve by the control device after the water filtering system is started for a first preset time;
the control device is used for controlling the waste water valve to increase the opening degree after detecting that the flow of the waste water outlet is smaller than a first preset flow; controlling the waste water valve to reduce the opening after detecting that the flow of the waste water outlet is larger than a second preset flow; wherein the second preset flow is greater than or equal to the first preset flow.
2. The water filtration system of claim 1, further comprising:
the pressure sensor is used for detecting the pressure of the raw water inlet; and
the first alarm module is used for sending out first alarm information when the pressure of the raw water inlet is larger than a first preset pressure value.
3. The water filtration system of claim 1, wherein the control device further comprises:
the second alarm module is used for sending out second alarm information after the control device controls the waste water valve to increase the opening degree and still detects that the flow of the waste water outlet is smaller than the first preset flow after the second preset time.
4. A control method of a water filtration system, characterized by comprising the steps of:
detecting the flow of the waste outlet;
controlling the opening of a waste valve arranged at the waste outlet according to the flow rate of the waste outlet so as to maintain the constant flow rate of the waste outlet;
the method further comprises the following steps before the step of detecting the flow of the waste outlet:
the water filtration system is started and then delayed for a first preset time.
5. The method of controlling a water filtration system of claim 4, further comprising:
detecting the pressure of a raw water inlet;
and when the pressure of the raw water inlet is larger than a first preset pressure value, sending out first alarm information.
6. The method of controlling a water filtration system according to any one of claims 4 or 5, wherein the step of controlling the opening of a waste valve provided at the waste outlet in accordance with the flow rate of the waste outlet so that the flow rate of the waste outlet is constant comprises:
after detecting that the flow of the waste water outlet is smaller than a first preset flow, controlling the waste water valve to increase the opening;
controlling the waste water valve to reduce the opening after detecting that the flow of the waste water outlet is larger than a second preset flow;
wherein the second preset flow is greater than the first preset flow.
7. The method of controlling a water filtration system of claim 6, wherein after the step of controlling the waste valve to increase the opening degree after detecting that the flow rate of the waste outlet is less than a first preset flow rate, further comprising:
and after the second preset time still detects that the flow of the waste water outlet is smaller than the first preset flow, sending out second alarm information.
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