CN112324645B - Control method of water pump - Google Patents
Control method of water pump Download PDFInfo
- Publication number
- CN112324645B CN112324645B CN202011107846.7A CN202011107846A CN112324645B CN 112324645 B CN112324645 B CN 112324645B CN 202011107846 A CN202011107846 A CN 202011107846A CN 112324645 B CN112324645 B CN 112324645B
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- Prior art keywords
- water pump
- minutes
- pressure
- change speed
- pressure change
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a control method of a water pump, which detects the pressure and the pressure change speed in the water pump through the combination of a pressure sensor and a controller to judge the water flow state in the water pump so as to automatically control the start and stop of the water pump. The control method of the water pump has the following advantages: the water flow state is intelligently judged through the pressure and the pressure change speed, corresponding actions are selected, and the pressure change speed are combined, so that the judgment is more accurate, and the water pump is safer and more energy-saving to operate.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to a control method of a water pump.
Background
Along with the improvement of the living standard of people and the requirement on automation, the demand of the civil water pump, particularly the automatic control technology of the household water pump, is more and more strong.
At present, the civil water pump mainly depends on the use of a pressure sensor to realize automatic control. The method for realizing the automatic control of the water pump by independently using the pressure sensor has the advantages that the monitoring signal of the water pump only has one pressure signal, the starting and the stopping of the water pump can be controlled only by the pressure signal, the control accuracy is not enough in the actual use process, and the abnormal starting and the stopping of the water pump are easily caused; particularly, when the water inlet pressure changes, the power supply voltage fluctuates or the performance of the water pump is reduced, and the operation pressure of the water pump cannot reach the preset stop pressure, the water pump cannot be normally stopped, so that the water pump runs for a long time, electric energy is wasted, and the pipeline is more likely to burst in serious cases.
Disclosure of Invention
The present invention is directed to a method for controlling a water pump that is safe to operate.
The invention provides a control method of a water pump, which comprises a controller for controlling the start and stop of the water pump, and a pressure sensor for detecting the pressure of the water pump, wherein the pressure sensor outputs a pressure signal to the controller; the method is characterized in that: the method comprises the following steps:
comparing the pressure change speed received by the controller with a preset pressure change speed A, if the pressure change speed is greater than the preset pressure change speed A, judging that pressure change exists, and continuously operating the water pump; if the pressure change speed is less than the preset pressure change speed A, judging that no pressure change exists, and executing a step II;
step two, the controller compares the received pressure value with a preset pressure value B, if the pressure value is larger than the preset pressure value B, the pressure is judged to exist, the water pump stops running after running for C minutes, and the water pump enters a standby state; and if the pressure value is less than the preset pressure value B, judging that no pressure exists, and powering off and stopping the water pump after the water pump runs for D minutes.
In order to ensure the reliable judgment, if the pressure change speed received by the controller in the step one is greater than the preset pressure change speed A for F minutes, the controller judges that the pressure is changed.
To ensure a reliable decision, F is 5.
In order to ensure the starting safety, the preset pressure change speed A in the step one is 0.05 MPa/second.
In order to ensure the safe starting, the preset pressure value B in the second step is 1/2 of the pump head.
In order to save energy, C in the second step is 5.
In order to save energy, the power-off shutdown after the water pump runs for D minutes in the second step is that the water pump runs for E minutes and stops for G minutes, and the power-off shutdown is performed after certain times of running and shutdown cycles.
In order to ensure safety, the second step needs to be plugged and unplugged after the power-off and shutdown after the operation and the shutdown cycle of the determined times.
In order to save energy, the water pump is operated for E minutes and is shut down for G minutes, and the power-off shutdown is carried out after a determined number of operation and shutdown cycles: the operation is stopped for 30 minutes after 5 minutes for the first time, for 4 hours after 5 minutes for the second time, for 20 hours after 5 minutes for the third time, and is stopped by power failure after 5 minutes for the last time.
The control method of the water pump has the following advantages: the water flow state is intelligently judged through the pressure and the pressure change speed, corresponding actions are selected, and the pressure change speed are combined, so that the judgment is more accurate, and the water pump is safer and more energy-saving to operate.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to more clearly understand the technical scheme of the invention, the invention is further illustrated by the following embodiments in combination with the accompanying drawings.
Example 1:
the control method for the water pump provided by the embodiment includes, as shown in fig. 1, a controller for controlling start and stop of the water pump, and a pressure sensor for detecting pressure of the water pump, where the pressure sensor outputs a pressure signal to the controller; the method is characterized in that: the method comprises the following steps:
comparing the pressure change speed received by the controller with a preset pressure change speed A, if the pressure change speed is greater than the preset pressure change speed A, judging that pressure change exists, and continuously operating the water pump; if the pressure change speed is less than the preset pressure change speed A, judging that no pressure change exists, and executing a step II;
step two, the controller compares the received pressure value with a preset pressure value B, if the pressure value is larger than the preset pressure value B, the pressure is judged to exist, the water pump stops running after running for C minutes, and the water pump enters a standby state; and if the pressure value is smaller than a preset pressure value B, judging that no pressure exists, and powering off and stopping the water pump after the water pump runs for D minutes.
The control method realizes automatic control by detecting the pressure value and the pressure change speed, only a pressure sensor is needed, and the cost is saved; judging the working state of the water pump by detecting the pressure change speed, and if the pressure change is judged to exist, judging the working state to be a normal working state, and continuously operating the water pump; if no pressure change is judged, the working state of the water pump is further judged according to the pressure value, if pressure exists, the water pump is in a valve closing state, energy is saved for protecting the water pump, and the water pump enters a standby state after running for C minutes; if no pressure is judged, the water pump is in a no-water no-load state, energy is saved for protecting the water pump, and the water pump is powered off and stopped after running for D minutes.
Example 2:
in order to ensure reliable determination, in the method for controlling a water pump according to this embodiment, in addition to the features of embodiment 1, if the pressure change rate received by the controller in the first step is greater than the preset pressure change rate a for F minutes, it is determined that there is a pressure change. And F minutes of continuous comparison enables the judgment to be more reliable, and reduces the influence of errors and unexpected factors.
To ensure a reliable decision, F is 5.
In order to ensure the starting safety, the preset pressure change speed A in the step one is 0.05 MPa/s.
In order to ensure the safe starting, the preset pressure value B in the second step is 1/2 of the pump head.
In order to save energy, C in the second step is 5.
Through above-mentioned design, continuous 5 minutes comparison change can guarantee the existence of change, reduces the influence of unexpected factor, and preset pressure change speed A is 0.05 MPa/second, reduces the interference of pressure change speed in the water pump itself, ensures the reliability of judging, and preset pressure value B is 1/2 water pump lift, sets for the pressure value B who is applicable to this water pump according to the water pump for application range is wider.
Example 3:
in the method for controlling the water pump provided in this embodiment, in order to save energy, in addition to the features described in embodiment 1, the power-off shutdown after the water pump is operated for D minutes in the second step is that the water pump is operated for E minutes and is stopped for G minutes, and the power-off shutdown is performed after certain number of operation and shutdown cycles.
In order to ensure safety, the second step needs to be plugged and unplugged after the power-off and shutdown after the operation and the shutdown cycle of the determined times.
In order to save energy, the water pump is operated for E minutes and is shut down for G minutes, and the power-off shutdown is carried out after a determined number of operation and shutdown cycles: the operation is stopped for 30 minutes after 5 minutes for the first time, for 4 hours after 5 minutes for the second time, for 20 hours after 5 minutes for the third time, and is stopped by power failure after 5 minutes for the last time.
Through the design, after the water-free no-load state is judged, the water pump is powered off and shut down after repeated short-time circulating operation, the water pump is guaranteed to be in the water-free no-load state in the circulating process, the possibility of short-time water supply interruption is eliminated, the water pump is protected while the single running time is short, energy is saved, the power supply needs to be plugged and unplugged after the water pump is restarted, the use safety is guaranteed, and the energy is saved.
Claims (9)
1. A control method of a water pump comprises a controller for controlling the start and stop of the water pump and a pressure sensor for detecting the pressure of the water pump, wherein the pressure sensor outputs a pressure signal to the controller; the method is characterized in that: the method comprises the following steps:
step one, a controller compares the received pressure change speed with a preset pressure change speed A, if the pressure change speed is greater than the preset pressure change speed A, pressure change is judged to exist, and a water pump continuously operates; if the pressure change speed is less than the preset pressure change speed A, judging that no pressure change exists, and executing a step II;
step two, the controller compares the received pressure value with a preset pressure value B, if the pressure value is larger than the preset pressure value B, the pressure is judged to exist, the water pump stops running after running for C minutes, and the water pump enters a standby state; and if the pressure value is less than the preset pressure value B, judging that no pressure exists, and powering off and stopping the water pump after the water pump runs for D minutes.
2. A method of controlling a water pump according to claim 1, wherein: and if the pressure change speed received by the controller in the step one is greater than the preset pressure change speed A for F minutes continuously, determining that the pressure changes.
3. A method of controlling a water pump according to claim 2, wherein: and F is 5.
4. A control method of a water pump according to claim 1, wherein: the preset pressure change speed A in the step one is 0.05 MPa/s.
5. A method of controlling a water pump according to claim 1, wherein: and the preset pressure value B in the second step is 1/2 of the pump lift of the water pump.
6. A control method of a water pump according to claim 1, wherein: and C in the second step is 5.
7. A method of controlling a water pump according to any one of claims 1 to 6, wherein: and D, stopping the water pump for D minutes after the water pump runs, namely stopping the water pump for G minutes after the water pump runs for E minutes, and stopping the water pump after certain times of running and stopping circulation.
8. A control method of a water pump according to claim 7, wherein: and step two, after the operation for the determined times and the outage after the outage circulation, starting the power supply to be plugged next time.
9. A method of controlling a water pump according to claim 8, wherein: the water pump is operated for E minutes and is stopped for G minutes, and the power-off and stop after the operation and stop circulation for certain times are as follows: the operation is stopped for 30 minutes after 5 minutes for the first time, for 4 hours after 5 minutes for the second time, for 20 hours after 5 minutes for the third time, and is stopped by power failure after 5 minutes for the last time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011107846.7A CN112324645B (en) | 2020-10-16 | 2020-10-16 | Control method of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011107846.7A CN112324645B (en) | 2020-10-16 | 2020-10-16 | Control method of water pump |
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| Publication Number | Publication Date |
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| CN112324645A CN112324645A (en) | 2021-02-05 |
| CN112324645B true CN112324645B (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011107846.7A Active CN112324645B (en) | 2020-10-16 | 2020-10-16 | Control method of water pump |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133766A (en) * | 1993-11-11 | 1995-05-23 | Nippondenso Co Ltd | Pump controller |
| JPH10252659A (en) * | 1997-03-07 | 1998-09-22 | Hitachi Ltd | Pump device |
| JP2002054577A (en) * | 2000-08-16 | 2002-02-20 | Matsushita Electric Ind Co Ltd | Controlling method for pump |
| CN103629095B (en) * | 2012-08-24 | 2016-08-17 | 岳勇斌 | Microdiaphragm pump simulated frequency conversion system and control method thereof |
| CN103671047B (en) * | 2013-12-13 | 2016-04-13 | 新界泵业集团股份有限公司 | A kind of electric pump of tape controller and controlling method thereof |
| CN205349679U (en) * | 2016-01-21 | 2016-06-29 | 浙江大元泵业股份有限公司 | Water pump automatic control device |
| CN106121984B (en) * | 2016-07-30 | 2017-12-05 | 陈辉 | The low stop frequency control method of water pump and water pump based on Pressure Switch Sensor |
| CN106438394B (en) * | 2016-07-30 | 2018-02-09 | 陈辉 | Water pump total head operation control method and controller, water pump |
| CN107061248A (en) * | 2016-11-18 | 2017-08-18 | 浙江美罗机电有限公司 | A kind of control method of Water pump pressure controller |
| CN107559182A (en) * | 2017-08-31 | 2018-01-09 | 广东工业大学 | A kind of water pump control method and control system |
| CN111140484B (en) * | 2019-12-24 | 2022-10-18 | 广州市中海达测绘仪器有限公司 | Concrete pump monitoring method and device |
| CN111322232B (en) * | 2020-01-13 | 2022-05-20 | 爱科赛智能科技(浙江)有限公司 | Autonomous learning intelligent water pump control method |
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| CN112324645A (en) | 2021-02-05 |
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