CN210645458U - Composite automatic backwashing filter - Google Patents
Composite automatic backwashing filter Download PDFInfo
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- CN210645458U CN210645458U CN201920797360.7U CN201920797360U CN210645458U CN 210645458 U CN210645458 U CN 210645458U CN 201920797360 U CN201920797360 U CN 201920797360U CN 210645458 U CN210645458 U CN 210645458U
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Abstract
The utility model provides a compound automatic back flush filter includes water inlet main, a plurality of first three-way valve, first blow off pipe, a plurality of sand and stone filter, first strainer, a plurality of second three-way valve, second blow off pipe, a plurality of lamination filter, second strainer, the last a plurality of delivery ports that are equipped with of water inlet main, the delivery port of inlet tube and the first port intercommunication of first three-way valve, the second port and the first blow off pipe intercommunication of first three-way valve, sand and stone filter's delivery port and the water inlet intercommunication of first strainer, the delivery port of first strainer and the first port intercommunication of a plurality of second three-way valves, the second port and the second blow off pipe intercommunication of second three-way valve, the delivery port and the water inlet intercommunication of second strainer of lamination filter. The utility model also provides two filtering methods of the composite automatic backwashing filter. The filtration and the back washing can be more scientific and controllable through the pressure difference control and the time control.
Description
Technical Field
The utility model relates to the technical field of filters, especially, relate to a compound automatic back flush filter.
Background
Irrigation water contains many impurities. When in drip irrigation, the drippers on the drip irrigation pipeline are easily blocked by the impurities. The filter comprises a centrifugal filter, a sand filter, a net filter and a laminated filter, and the filtering emphasis points of different filters are different. For example, centrifugal filters are suitable for filtering impurities with a high density, sand filters are suitable for filtering impurities with a low density and a high volume, and generally, different types of filters are selected for different water qualities. The water quality of irrigation water is complex, the water quality of different rivers and lakes is different, the water quality of different seasons is different, and meanwhile, underground water, water after industrial wastewater treatment, domestic water, natural rainfall and the like can also be used as irrigation water. Different water qualities, its impurity composition is different, therefore the filtration mode also is different, adopts single filter and filtration method to different water qualities, then will appear filtering inadequately, or can't satisfy water demand scheduling problem.
Disclosure of Invention
In view of this, it is necessary to provide a composite automatic backwashing filter which is convenient to maintain and suitable for different water qualities.
A composite automatic backwashing filter comprises a water inlet main pipe, a plurality of first three-way valves, a first sewage discharge pipe, a plurality of sand filters, a first water filtering pipe, a plurality of second three-way valves, a second sewage discharge pipe, a plurality of laminated filters and a second water filtering pipe, wherein the water inlet main pipe is provided with a plurality of water outlets, the water outlet of the water inlet pipe is communicated with a first port of the first three-way valve, a second port of the first three-way valve is communicated with the first sewage discharge pipe, correspondingly, the first sewage discharge pipe is provided with water inlets with the same quantity as the sand filters so as to discharge backwashing sewage in the sand filters into the first sewage discharge pipe, the water outlet of the sand filters is communicated with the water inlet of the first water filtering pipe so as to discharge water filtered by the sand filters into the first water filtering pipe, correspondingly, the quantity of the water inlets on the first water filtering pipe is the same as the quantity of the sand filters so as to connect the sand filters in parallel, the water outlet of the first filtering water pipe is communicated with the first ports of the second three-way valves, the second ports of the second three-way valves are communicated with the second sewage pipe, correspondingly, the second sewage pipe is provided with water inlets with the same number as that of the laminated filters so as to discharge the sewage backwashed in the laminated filters into the second sewage pipe, the water outlet of the laminated filters is communicated with the water inlets of the second filtering water pipe so as to discharge the water filtered by the laminated filters into the second filtering water pipe, and correspondingly, the number of the water inlets on the second filtering water pipe is the same as that of the laminated filters so as to enable the laminated filters to be connected in parallel on the second filtering water pipe.
Preferably, the sandstone filter is provided with a first differential pressure sensor, the laminated filter is provided with a second differential pressure sensor, the sensing end of the first differential pressure sensor is positioned at the water inlet and the water outlet of the sandstone filter to collect the pressure difference between the water outlet and the water inlet of the sandstone filter, the sensing end of the second differential pressure sensor is positioned at the water inlet and the water outlet of the laminated filter to collect the pressure difference between the water outlet and the water inlet of the laminated filter, the composite automatic backwashing filter further comprises a controller, the controller is electrically connected with the signal output ends of the first differential pressure sensor and the second differential pressure sensor to receive the signals collected by the first differential pressure sensor and the second differential pressure sensor, and the controller is electrically connected with the first three-way valve and the second three-way valve to control the flow direction of water in the first three-way valve and the second three-way valve.
Preferably, the water inlet of the water inlet main pipe is provided with a turbidity sensor, and correspondingly, the controller comprises a clock module so as to set filtering and backwashing time according to the turbidity of the water inlet main pipe.
The filtering method of the composite automatic backwashing filter comprises the following steps:
step S001: setting a sand-stone low-level differential pressure reference value, a sand-stone high-level differential pressure reference value, a laminated low-level differential pressure reference value and a laminated high-level differential pressure reference value through a controller according to the flow of irrigation water entering a sand-stone filter or a laminated filter;
step S002: the controller controls the first three-way valve and the second three-way valve to enable irrigation water to enter the composite automatic backwashing filter and filter the irrigation water;
step S003: the first differential pressure sensor collects differential pressure information of a water inlet and a water outlet of the sand filter and transmits the differential pressure information to the controller in the form of electric signals, and the controller generates a real-time sand differential pressure value according to the differential pressure information; the second differential pressure sensor acquires differential pressure information of a water inlet and a water outlet of the laminated filter and transmits the differential pressure information to the controller in the form of an electric signal, and the controller generates a real-time laminated differential pressure value from the differential pressure information;
step S004: when the real-time sand-rock pressure difference value is larger than the sand-rock high-level pressure difference reference value, the controller controls a first three-way valve communicated with the sand-rock filter to enable the sand-rock filter to be communicated with a first drain pipe, so that filtered water in the first filtering pipeline reversely enters the sand-rock filter and flows out of the first drain pipe to flush the sand-rock filter; when the real-time lamination pressure difference value is larger than the lamination high-order pressure difference reference value, the controller controls a second three-way valve communicated with the lamination filter to enable the lamination filter to be communicated with a second sewage discharge pipe, so that filtered water in a second filtering pipeline reversely enters the lamination filter and flows out of the second sewage discharge pipe to flush the lamination filter;
step S005: when the real-time sand-rock pressure difference value is smaller than the sand-rock low-level pressure difference reference value, the controller controls a first three-way valve communicated with the sand-rock filter, so that the sand-rock filter is communicated with a first filtering water pipe to filter irrigation water; when the real-time laminated pressure difference value is less than the laminated low differential pressure reference value, the controller controls a second three-way valve in communication with the laminated filter to communicate the laminated filter with a second filtered water pipe to filter irrigation water flowing from the first filtered water pipe into the laminated filter.
The second filtering method of the composite automatic backwashing filter comprises the following steps:
step S101: the turbidity sensor collects turbidity information of irrigation water and transmits the turbidity information to the controller, and the controller sets a sand filtration time reference value, a sand backwashing time reference value, a lamination filtration time reference value and a lamination backwashing time reference value according to the turbidity of the irrigation water;
step S102: the controller controls the first three-way valve and the second three-way valve to enable irrigation water to enter the composite automatic backwashing filter and filter the irrigation water, and a clock module of the controller starts to time and generates a real-time sand filtering time value and a real-time lamination filtering time value;
step S103: the controller compares the real-time sandstone filtration time value with the sandstone filtration time reference value, and when the real-time sandstone filtration time value is equal to the sandstone filtration time reference value, the controller controls the first three-way valve to communicate the sandstone filter with the first drain pipe, so that filtered water in the first filtration pipeline reversely enters the sandstone filter and flows out of the first drain pipe to flush the sandstone filter, and meanwhile, a clock module of the controller starts to time and generates a real-time sandstone backwashing time value; the controller compares the real-time lamination filtering time value with the lamination filtering reference value, and when the real-time lamination filtering time value is equal to the lamination filtering reference value, the controller controls the second three-way valve to communicate the lamination filter with the second sewage discharge pipe, so that filtered water in the second filtering pipeline reversely enters the lamination filter and flows out of the second sewage discharge pipe to flush the lamination filter, and meanwhile, a clock module of the controller starts to time and generate a real-time lamination backwashing time value;
step S104: the controller compares the real-time sandstone backwashing time value with a sandstone backwashing time reference value, and when the real-time sandstone backwashing time value is equal to the sandstone backwashing time reference value, the controller controls the first three-way valve to communicate the sandstone filter with the water inlet main pipe, so that irrigation water in the water inlet main pipe enters the sandstone filter for filtering, and meanwhile, a clock module of the controller starts to time and generate a real-time sandstone filtering time value; the controller compares the real-time lamination backwashing time value with the lamination backwashing time reference value, and when the real-time lamination backwashing time value is equal to the lamination backwashing time reference value, the controller controls the second three-way valve to communicate the lamination filter with the first filtering pipeline, so that irrigation water in the first filtering pipeline enters the lamination filter for filtering, and meanwhile, a clock module of the controller starts to time and generate the real-time lamination filtering time value.
Preferably, in step S101, when the turbidity at the water inlet main pipe is 0 to 10NTU, the sand filtration time reference value is 6h, the sand backwashing time reference value is 3min, the lamination filtration time reference value is 5h, and the lamination backwashing time reference value is 20S.
Preferably, when the turbidity at the water inlet main pipe is 10-300 NTU, the sandstone filtration time reference value is 4-6 h, the sandstone backwashing time reference value is 3-4 min, the lamination filtration time reference value is 4-5 h, and the lamination backwashing time reference value is 20-25 s.
Preferably, when the turbidity at the water inlet main pipe is 300-1500 NTU, the sandstone filtration time reference value is 2-4 h, the sandstone backwashing time reference value is 4-5 min, the lamination filtration time reference value is 3-4 h, and the lamination backwashing time reference value is 25-30 s.
Preferably, when the turbidity at the water inlet main pipe is more than 1500NTU, the sandstone filtration time reference value is 1-2 h, the sandstone backwashing time reference value is 5min, the lamination filtration time reference value is 2-3 h, and the lamination backwashing time reference value is 25 s.
Preferably, in step S102, when the composite automatic backwashing filter includes a plurality of sand filters or stacked filters, the controller controls the sand filters or stacked filters at intervals to correspond to the connected first three-way valve or second three-way valve, so that the irrigation water is staggered to enter the plurality of sand filters or stacked filters.
Has the advantages that: the utility model discloses a compound automatic back flush filter includes water inlet header pipe, a plurality of first three-way valves, first blow off pipe, a plurality of sand and stone filters, first strainer, a plurality of second three-way valves, second blow off pipe, a plurality of lamination filters, second strainer, through setting up differential pressure sensor, turbidity sensor, clock module, can carry out differential pressure control or time control to the filter to filter irrigation water or carry out the back flush to the filter. The utility model also provides a filtration method of two kinds of compound automatic back flush filters, utilizes promptly the utility model discloses a compound automatic back flush filter filters irrigation water through pressure differential control and time control. In the prior art, the filter is manually backwashed through experience. However, the actual irrigation water is from many sources, and the time required for filtering each type of irrigation water is different. The filtering and back washing can be more scientific and controllable through the pressure difference control and the time control, and meanwhile, the filtering effect is better for the irrigation water with different water qualities, and the service life of the filter is also prolonged.
Drawings
Fig. 1 is a schematic structural view of the composite automatic backwashing filter of the present invention.
Fig. 2 is a functional block diagram of the composite automatic backwashing filter of the utility model.
In the figure: the system comprises a water inlet main pipe 10, a first three-way valve 20, a first drain pipe 30, a sand filter 40, a first differential pressure sensor 401, a first filtering water pipe 50, a second three-way valve 60, a second drain pipe 70, a laminated filter 80, a second differential pressure sensor 801, a second filtering water pipe 90 and a controller 100.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1 and 2, a composite automatic backwashing filter includes a water inlet main pipe 10, a plurality of first three-way valves 20, a first sewage pipe 30, a plurality of sand filters 40, a first water filtering pipe 50, a plurality of second three-way valves 60, a second sewage pipe 70, a plurality of laminated filters 80, and a second water filtering pipe 90, the water inlet main pipe 10 is provided with a plurality of water outlets, the water outlet of the water inlet pipe is communicated with a first port of the first three-way valve 20, a second port of the first three-way valve 20 is communicated with the first sewage pipe 30, correspondingly, the first sewage pipe 30 is provided with water inlets having the same number as that of the sand filters 40 so as to discharge backwashing sewage in the sand filters 40 into the first sewage pipe 30, the water outlet of the sand filters 40 is communicated with the water inlet of the first water filtering pipe 50 so as to discharge water passing through the sand filters 40 into the first water filtering pipe 50, the number of the water inlets of the first filtering pipes 50 is the same as that of the sand filters 40, so that the sand filters 40 are connected in parallel to the first filtering pipes 50, the water outlets of the first filtering pipes 50 are communicated with the first ports of the plurality of second three-way valves 60, the second ports of the second three-way valves 60 are communicated with the second sewage discharge pipe 70, correspondingly, the second sewage discharge pipe 70 is provided with the same number of water inlets as that of the laminated filters 80, so that the sewage backwashed in the laminated filters 80 is discharged into the second sewage discharge pipe, the water outlets of the laminated filters 80 are communicated with the water inlets of the second filtering pipes 90, so that the water filtered by the laminated filters 80 is discharged into the second filtering pipes, correspondingly, the number of the water inlets of the second filtering pipes 90 is the same as that of the laminated filters 80, so that the laminated filters 80 are connected in parallel to the second filtering pipes 90.
Furthermore, a first differential pressure sensor 401 is arranged on the sand filter 40, a second differential pressure sensor 801 is arranged on the laminated filter 80, the sensing end of the first differential pressure sensor 401 is positioned at the water inlet and the water outlet of the sand filter 40, so as to collect the pressure difference between the water outlet and the water inlet of the sand filter 40, the sensing end of the second pressure difference sensor 801 is positioned at the water inlet and the water outlet of the laminated filter 80, the composite automatic backwashing filter also comprises a controller 100 by collecting the pressure difference between the water outlet and the water inlet of the laminated filter 80, the controller 100 is electrically connected with the signal output ends of the first differential pressure sensor 401 and the second differential pressure sensor 801, to receive the collected signals of the first differential pressure sensor 401 and the second differential pressure sensor 801, the controller 100 is further electrically connected to the first three-way valve 20 and the second three-way valve 60 to control the flow direction of the water in the first three-way valve 20 and the second three-way valve 60.
Further, a turbidity sensor 101 is disposed at the water inlet of the water inlet main pipe 10, and correspondingly, the controller 100 includes a clock module to set the filtering and backwashing time according to the turbidity of the water inlet main pipe 10.
The utility model discloses a compound automatic back flush filter includes a plurality of sand and stone filters 40, lamination filter
80. Differential pressure sensor, turbidity sensor 101, controller 100, differential pressure sensor gathers the exit differential pressure information of filter, turbidity sensor 101 gathers irrigation water's turbidity information, through differential pressure information and turbidity information's collection, controller 100 can carry out accurate control to sand and stone filter 40 and lamination filter 80, the irrigation water of different grade type is distinguished through irrigation water turbidity's detection, thereby make irrigation water's filtration more scientific, the difference is because of the use and the irrigation effect that people's subjective judgement influences the filter.
The filtering method of the composite automatic backwashing filter comprises the following steps:
step S001: setting a sand-low differential pressure reference value, a sand-high differential pressure reference value, a lamination-low differential pressure reference value and a lamination-high differential pressure reference value through the controller 100 according to the flow of irrigation water entering the sand filter 40 or the lamination filter 80;
step S002: the controller 100 controls the first three-way valve 20 and the second three-way valve 60 to make the irrigation water enter the composite automatic backwashing filter and filter the irrigation water;
step S003: the first differential pressure sensor 401 collects differential pressure information of the water inlet and the water outlet of the sand filter 40 and transmits the differential pressure information to the controller 100 in the form of an electric signal, and the controller 100 generates a real-time sand differential pressure value according to the differential pressure information; the second differential pressure sensor 801 acquires differential pressure information of the water inlet and the water outlet of the laminated filter 80 and transmits the differential pressure information to the controller 100 in the form of an electric signal, and the controller 100 generates a real-time laminated differential pressure value from the differential pressure information;
step S004: when the real-time sand-rock pressure difference value is greater than the reference value of the sand-rock high-level pressure difference, the controller 100 controls the first three-way valve 20 communicated with the sand filter 40 to communicate the sand filter 40 with the first drain pipe 30, so that the filtered water in the first filtered pipe reversely enters the sand filter 40 and flows out from the first drain pipe 30 to flush the sand filter 40; when the real-time lamination differential pressure value is greater than the lamination high differential pressure reference value, the controller 100 controls the second three-way valve 60 communicated with the lamination filter 80 to communicate the lamination filter 80 with the second sewage discharge pipe 70, so that the filtered water in the second filtering pipeline reversely enters the lamination filter 80 and flows out of the second sewage discharge pipe 70 to flush the lamination filter 80;
step S005: when the real-time sand-pressure difference value is smaller than the reference value of sand low-level pressure difference, the controller 100 controls the first three-way valve 20 communicated with the sand filter 40 to communicate the sand filter 40 with the first water filtering pipe 50 to filter the irrigation water; when the real-time lamination pressure difference value is less than the lamination low pressure difference reference value, the controller 100 controls the second three-way valve 60, which is in communication with the lamination filter 80, such that the lamination filter 80 is in communication with the second filtered water pipe 90, to filter the irrigation water flowing from the first filtered water pipe 50 into the lamination filter 80.
The second filtering method of the composite automatic backwashing filter comprises the following steps:
step S101: the turbidity sensor 101 acquires the turbidity information of the irrigation water and transmits the turbidity information to the controller 100, and the controller 100 sets a sand filtration time reference value, a sand backwashing time reference value, a lamination filtration time reference value and a lamination backwashing time reference value according to the turbidity of the irrigation water;
step S102: the controller 100 controls the first three-way valve 20 and the second three-way valve 60 to enable irrigation water to enter the composite automatic backwashing filter and filter the irrigation water, and a clock module of the controller 100 starts timing and generates a real-time sand filtering time value and a real-time lamination filtering time value;
step S103: the controller 100 compares the real-time sandstone filtration time value with the sandstone filtration time reference value, when the real-time sandstone filtration time value is equal to the sandstone filtration time reference value, the controller 100 controls the first three-way valve 20 to communicate the sandstone filter 40 with the first drain pipe 30, so that the filtered water in the first filtration pipeline reversely enters the sandstone filter 40 and flows out of the first drain pipe 30 to wash the sandstone filter 40, and meanwhile, the clock module of the controller 100 starts to time and generate the real-time sandstone backwashing time value; the controller 100 compares the real-time lamination filtering time value with the lamination filtering reference value, when the real-time lamination filtering time value is equal to the lamination filtering reference value, the controller 100 controls the second three-way valve 60 to communicate the lamination filter 80 with the second sewage discharge pipe 70, so that the filtered water in the second filtering pipeline reversely enters the lamination filter 80 and flows out of the second sewage discharge pipe 70 to wash the lamination filter 80, and meanwhile, the clock module of the controller 100 starts to time and generate the real-time lamination backwashing time value;
step S104: the controller 100 compares the real-time sandstone back-flushing time value with a sandstone back-flushing time reference value, when the real-time sandstone back-flushing time value is equal to the sandstone back-flushing time reference value, the controller 100 controls the first three-way valve 20 to communicate the sandstone filter 40 with the water inlet main pipe 10, so that irrigation water in the water inlet main pipe 10 enters the sandstone filter 40 for filtering, and meanwhile, a clock module of the controller 100 starts to time and generate a real-time sandstone filtering time value; the controller 100 compares the real-time lamination backwashing time value with the lamination backwashing time reference value, when the real-time lamination backwashing time value is equal to the lamination backwashing time reference value, the controller 100 controls the second three-way valve 60 to communicate the lamination filter 80 with the first filtering pipeline, so that irrigation water in the first filtering pipeline enters the lamination filter 80 for filtering, and meanwhile, the clock module of the controller 100 starts timing and generates the real-time lamination filtering time value.
Further, in step S101, when the turbidity at the water inlet main pipe 10 is 0 to 10NTU, the sand filtration time reference value is 6h, the sand backwashing time reference value is 3min, the lamination filtration time reference value is 5h, and the lamination backwashing time reference value is 20S.
Further, when the turbidity at the position of the water inlet main pipe 10 is 10-300 NTU, the sand filtration time reference value is 4-6 h, the sand backwashing time reference value is 3-4 min, the lamination filtration time reference value is 4-5 h, and the lamination backwashing time reference value is 20-25 s.
Further, when the turbidity of the water inlet main pipe 10 is 300-1500 NTU, the sandstone filtration time reference value is 2-4 h, the sandstone backwashing time reference value is 4-5 min, the lamination filtration time reference value is 3-4 h, and the lamination backwashing time reference value is 25-30 s.
Further, when the turbidity at the position of the water inlet main pipe 10 is larger than 1500NTU, the sand filtration time reference value is 1-2 h, the sand backwashing time reference value is 5min, the lamination filtration time reference value is 2-3 h, and the lamination backwashing time reference value is 25 s.
Further, in step S102, when the composite automatic backwashing filter includes a plurality of sand filters 40 or laminated filters 80, the controller 100 controls the sand filters 40 or laminated filters 80 to be connected to the first three-way valve 20 or the second three-way valve 60 at intervals, so that the irrigation water is staggered to enter the plurality of sand filters 40 or laminated filters 80.
The drip irrigation technology has higher requirement on the cleanness degree of irrigation water. The irrigation water is mainly from rivers, lakes, reservoirs and underground water. The irrigation water has various sources and different water qualities. In the prior art, the filtering and backwashing time is judged manually through experience. Taking yellow river water as an example, the water quality of different seasons, different sections and different time periods are different. Problems arise if the filtration and backwash times are determined empirically, by hand only. If the filtering time is too long, the filter accumulates a lot of impurities, and the pressure applied to the filter is also increased, resulting in a reduction in the life of the filter. Meanwhile, the impurities which are not filtered are increased, so that the pipe network is blocked. If the filtration time is too short, the amount of water that flows out of the filter through the drain will increase, resulting in a waste of irrigation water. The utility model discloses use irrigation water's turbidity as the standard, confirm irrigation water's filter time and back flush time to the accurate control filter. The service life of the filter is prolonged, the stability of the filtered water quality is improved, and the filtering process is more scientific and standardized.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a compound automatic back flush filter which characterized in that: the sewage treatment device comprises a water inlet main pipe, a plurality of first three-way valves, a first drain pipe, a plurality of sand filters, a first filtering water pipe, a plurality of second three-way valves, a second drain pipe, a plurality of laminated filters and a second filtering water pipe, wherein the water inlet main pipe is provided with a plurality of water outlets, the water outlet of the water inlet pipe is communicated with a first port of the first three-way valves, a second port of the first three-way valves is communicated with the first drain pipe, correspondingly, the first drain pipe is provided with water inlets with the same quantity as the sand filters so as to discharge back-washed sewage in the sand filters into the first drain pipe, the water outlets of the sand filters are communicated with the water inlets of the first filtering water pipe so as to discharge water filtered by the sand filters into the first filtering water pipe, correspondingly, the quantity of the water inlets on the first filtering water pipe is the same as the quantity of the sand filters so that the sand filters are connected, the water outlet of the first filtering water pipe is communicated with the first ports of the second three-way valves, the second ports of the second three-way valves are communicated with the second sewage pipe, correspondingly, the second sewage pipe is provided with water inlets with the same number as that of the laminated filters so as to discharge the sewage backwashed in the laminated filters into the second sewage pipe, the water outlet of the laminated filters is communicated with the water inlets of the second filtering water pipe so as to discharge the water filtered by the laminated filters into the second filtering water pipe, and correspondingly, the number of the water inlets on the second filtering water pipe is the same as that of the laminated filters so as to enable the laminated filters to be connected in parallel on the second filtering water pipe.
2. The composite automatic backwashing filter of claim 1, wherein: the composite automatic backwashing filter comprises a sand filter, a laminated filter and a controller, wherein the sand filter is provided with a first differential pressure sensor, the laminated filter is provided with a second differential pressure sensor, the sensing end of the first differential pressure sensor is positioned at the water inlet and the water outlet of the sand filter, so as to collect the pressure difference between the water outlet and the water inlet of the sand filter, the sensing end of the second differential pressure sensor is positioned at the water inlet and the water outlet of the laminated filter, so as to collect the pressure difference between the water outlet and the water inlet of the laminated filter, the composite automatic backwashing filter further comprises a controller, the controller is electrically connected with the signal output ends of the first differential pressure sensor and the second differential pressure sensor, so as to receive the collected signals of the first differential pressure sensor and the second differential pressure sensor, and the controller is electrically connected with a first three-way valve.
3. The composite automatic backwashing filter of claim 2, wherein: the water inlet of the water inlet main pipe is provided with a turbidity sensor, correspondingly, the controller comprises a clock module, and filtering and backwashing time is set according to the turbidity of the water inlet main pipe.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052078A (en) * | 2019-05-30 | 2019-07-26 | 宁夏尚禹节水科技有限公司 | Compound automatic backwashing filter and filter method |
| CN112426023A (en) * | 2020-10-13 | 2021-03-02 | 华帝股份有限公司 | Control method of cooking equipment |
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2019
- 2019-05-30 CN CN201920797360.7U patent/CN210645458U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052078A (en) * | 2019-05-30 | 2019-07-26 | 宁夏尚禹节水科技有限公司 | Compound automatic backwashing filter and filter method |
| CN112426023A (en) * | 2020-10-13 | 2021-03-02 | 华帝股份有限公司 | Control method of cooking equipment |
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