CN117536843A

CN117536843A - Water pump operation control method, device, equipment and storage medium

Info

Publication number: CN117536843A
Application number: CN202311501984.7A
Authority: CN
Inventors: 王朝晖; 许健; 胡优彬; 陆春富; 朱春光; 旷金国
Original assignee: Shenzhen Qianhai Energy Technology Development Co ltd
Current assignee: Shenzhen Qianhai Energy Technology Development Co ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-02-09
Anticipated expiration: 2043-11-13
Also published as: CN117536843B

Abstract

The method, the device, the equipment and the storage medium for controlling the operation of the water pump are provided by the embodiment of the application; according to the method, the pressure parameter of the current siphon structure and the target flow of the first water pump are obtained, then the working area of the first water pump under the pressure parameter is determined, meanwhile, the target frequency range of the first water pump is determined according to the target flow, the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter is obtained according to the effective cavitation allowance, and finally the frequency point, with the lower limit value of the maximum flow range exceeding the target flow, in the target frequency range is selected as the target working frequency. Therefore, the pressure parameter is used for representing the actual pipeline state of the siphon type water supply system in operation, the working area and the maximum flow range obtained according to the actual pressure parameter and the effective cavitation allowance are more in line with the actual working state, and further more accurate and reliable target working frequency can be selected, so that the water pump can accurately and reliably output the required target flow.

Description

Water pump operation control method, device, equipment and storage medium

Technical Field

The present disclosure relates to the field of control technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling operation of a water pump.

Background

A siphon type water supply system is a system for realizing water supply using the principle of natural force and gravity. In such systems, a water pump is used to raise the water level or enable it to be piped to where it is needed, so that proper control of the water pump operation can effectively improve the water balance in a siphonic water supply.

In the related art, control of the operation mode of the water pump in the siphon type water supply system is generally performed by detecting the working area of the water pump, so as to determine the target working frequency corresponding to the target flow according to the working area. However, there is still an error between the obtained target working area and the actual working area due to the fact that the pipeline state of the siphon type water supply system is changed in the actual working, so that the target flow cannot be reached when the water pump runs at the target working frequency.

Disclosure of Invention

The embodiment of the application provides a control method, a device, equipment and a storage medium for water pump operation, which can improve the accuracy of detecting the working area and the target working frequency in the water pump operation, so that the water pump can accurately output the target flow.

To achieve the above objective, a first aspect of an embodiment of the present application provides a control method for water pump operation, which is applied to a siphon water supply system, where the siphon water supply system includes a siphon structure, a first water pump and a second water pump that are sequentially connected, and the method includes:

Acquiring a pressure parameter of a current siphon structure and a target flow of the first water pump;

determining a working area of the first water pump under the pressure parameter; the working area is obtained according to a first lift curve of the first water pump in a first mode and a second lift curve of the first water pump in a second mode;

in the working area, determining a target frequency range of the first water pump according to the target flow;

acquiring the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter; the maximum flow range is obtained according to a first effective cavitation allowance of the first water pump in a first mode and a second effective cavitation allowance of the first water pump in a second mode;

and selecting the frequency point with the lower limit value of the maximum flow range larger than or equal to the target flow in the target frequency range as a target working frequency.

In some embodiments, the first mode is the second water pump being off, the first operating frequency of the first water pump varying between a first preset frequency and a second preset frequency; the second mode is that the second working frequency of the second water pump is a preset frequency value, and the first working frequency of the first water pump is changed between a third preset frequency and a fourth preset frequency; the determining the working area of the first water pump under the pressure parameter comprises:

Under the pressure parameter, according to the first mode, the first working frequency of the first water pump is increased from a first preset frequency to a second preset frequency, when the first working frequency is changed, the first lift of the first water pump is measured, and the first lift curve is generated according to the first lift;

under the pressure parameter, according to the second mode, the first working frequency of the first water pump is increased from a third preset frequency to a fourth preset frequency, when the first working frequency is changed, the second lift of the first water pump is measured, and the second lift curve is generated according to the second lift;

connecting the starting points of the first lift curve and the second lift curve to obtain a first connecting line, connecting the ending points of the first lift curve and the second lift curve to obtain a second connecting line, and obtaining the working area based on the first lift curve, the second lift curve, the first connecting line and the second connecting line.

In some embodiments, the determining, in the working area, the target frequency range of the first water pump according to the target flow rate includes:

Determining a first intersection point and a second intersection point on a boundary line of the working area according to the target flow;

determining a first target frequency according to a first target lift corresponding to the first intersection point, and determining a second target frequency according to a second target lift corresponding to the second intersection point;

the target frequency range is constructed from the first target frequency and the second target frequency.

In some embodiments, the target frequency range includes a first target frequency and a second target frequency; the obtaining the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter includes:

under the pressure parameter, according to the first mode, calculating a first water pump flow and a first effective cavitation allowance corresponding to each frequency point between the first target frequency and the second target frequency, and generating a first flow curve according to the first water pump flow and the first effective cavitation allowance;

under the pressure parameter, calculating a second water pump flow and a second effective cavitation allowance corresponding to each frequency point between the first target frequency and the second target frequency according to the second mode, and generating a second flow curve according to the second water pump flow and the second effective cavitation allowance;

Acquiring a pump cavitation margin curve corresponding to each frequency point;

determining third and fourth intersection points of the pump cavitation margin curve, the first flow rate curve and the second flow rate curve; the lower limit value of the flow range is the water pump flow corresponding to the third intersection point, and the upper limit value of the flow range is the water pump flow corresponding to the fourth intersection point.

In some embodiments, the determining the third and fourth intersection points of the pump cavitation margin curve, the first and second flow rate curves comprises:

judging whether the first flow curve and the pump cavitation allowance curve are intersected or not, and taking an intersection point of the first flow curve and the pump cavitation allowance curve as the third intersection point corresponding to the frequency point according to a first intersection judgment result;

or determining a third water pump flow of the frequency point in the first flow curve, and taking a coordinate point corresponding to the third water pump flow in the pump cavitation allowance curve as the third intersection point corresponding to the frequency point;

judging whether the second flow curve and the pump cavitation allowance curve are intersected or not, and taking an intersection point of the second flow curve and the pump cavitation allowance curve as the fourth intersection point corresponding to the frequency point according to a second intersection judgment result;

Or determining a fourth water pump flow of the frequency point in the second flow curve, and taking a coordinate point corresponding to the fourth water pump flow in the pump cavitation allowance curve as the fourth intersection point corresponding to the frequency point.

In some embodiments, when the lower limit of the maximum flow range for all of the frequency points is less than the target flow, the method further comprises:

checking whether the target flow belongs to a preset normal flow range or not to obtain a first check result;

checking whether the first flow curve and/or the second flow curve belong to a preset safety flow range or not, and obtaining a second checking result;

and sending a shutdown exhaust request according to the first test result and the second test result.

In some embodiments, the selecting, as the target operating frequency, the frequency point in the target frequency range where the lower limit value of the maximum flow rate range is greater than or equal to the target flow rate includes:

determining the operation power consumption of each frequency point in the target frequency range;

and selecting the frequency point which is larger than or equal to the target flow and meets the energy consumption cost index as a target working frequency in the target frequency range based on the operation power consumption.

To achieve the above object, a second aspect of the embodiments of the present application proposes a water pump operation control device, which is applied to a siphon water supply system including a siphon structure, a first water pump and a second water pump connected in sequence, the water pump operation control device comprising:

the acquisition module is used for acquiring the pressure parameter of the current siphon structure and the target flow of the first water pump;

the working area determining module is used for determining the working area of the first water pump under the pressure parameter; the working area is obtained according to a first lift curve of the first water pump in a first mode and a second lift curve of the first water pump in a second mode;

the frequency range determining module is used for determining a target frequency range of the first water pump according to the target flow in the working area;

the flow range determining module is used for obtaining the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter; the maximum flow range is obtained according to a first effective cavitation allowance of the first water pump in a first mode and a second effective cavitation allowance of the first water pump in a second mode;

And the target frequency determining module is used for selecting the frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow in the target frequency range as the target working frequency.

To achieve the above object, a third aspect of the embodiments of the present application provides an electronic device, where the electronic device includes a memory and a processor, where the memory stores a computer program, and the processor executes the computer program to implement the method for controlling the operation of the water pump according to the first aspect.

In order to achieve the above object, a fourth aspect of the embodiments of the present application proposes a storage medium, which is a computer-readable storage medium storing a computer program that when executed by a processor implements the method for controlling the operation of the water pump according to the first aspect.

The method, the device, the equipment and the storage medium for controlling the operation of the water pump are provided by the embodiment of the application; the method is applied to a siphonic water supply system, wherein the siphonic water supply system comprises a siphonic structure, a first water pump and a second water pump which are sequentially connected, and the method comprises the steps of obtaining the pressure parameter of the current siphonic structure and the target flow of the first water pump, and then determining the working area of the first water pump under the pressure parameter; the working area is obtained according to a first lift curve of the first water pump in a first mode and a second lift curve of the first water pump in a second mode; then in the working area, determining a target frequency range of the first water pump according to the target flow; under the pressure parameter, acquiring the maximum flow range of each frequency point in the target frequency range of the first water pump; the maximum flow range is obtained according to a first effective cavitation allowance of the first water pump in a first mode and a second effective cavitation allowance of the first water pump in a second mode; and finally, selecting a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow in the target frequency range as the target working frequency. Therefore, the pressure parameter is used for representing the actual pipeline state of the siphon type water supply system in operation, the working area obtained according to the actual pressure parameter is more in line with the actual working state, the maximum flow range of each working frequency point under the actual pressure parameter is obtained by using the effective cavitation allowance of the first water pump, and further, more accurate and reliable target working frequency can be selected by using the maximum flow ranges of the working area and each working frequency point of the water pump, so that the water pump can accurately and reliably output the required target flow.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Fig. 1 is a schematic structural diagram of a siphon water supply system according to an embodiment of the present application.

Fig. 2 is a flowchart of a control method for water pump operation according to still another embodiment of the present application.

Fig. 3 is a schematic view of a siphon water supply system according to another embodiment of the present application.

Fig. 4 is a flowchart of step S202 in fig. 2.

Fig. 5 is a schematic diagram of a simulation of a water pump working area according to an embodiment of the present application.

Fig. 6 is a flowchart of step S203 in fig. 2.

Fig. 7 is a schematic diagram of still another simulation of a water pump working area according to another embodiment of the present application.

Fig. 8 is a flowchart of step S204 in fig. 2.

Fig. 9 is a schematic diagram of a cavitation margin curve of a water pump according to another embodiment of the present application.

Fig. 10 is a flowchart of step S804 in fig. 8.

Fig. 11 is a schematic diagram of still another simulation of a cavitation margin curve of a water pump according to another embodiment of the present application.

Fig. 12 is a further flowchart of a control method for water pump operation according to a further embodiment of the present application.

Fig. 13 is a flowchart of step S205 in fig. 2.

Fig. 14 is a schematic structural view of a water pump operation control device according to still another embodiment of the present application.

Fig. 15 is a schematic hardware structure of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.

First, several nouns referred to in this application are parsed:

a siphon type water supply system is a method for realizing liquid movement by using natural pressure. It uses the pressure difference between the two to move the liquid without the input of external energy.

The pump lift refers to the vertical height difference that the pump can overcome or provide to the liquid during operation. In short, the lift is the required elevation of the liquid from the inlet to the outlet of the water pump. The unit of measure of the pump head is typically meters (m). It is determined by measuring the highest water level that can be reached by the liquid as it is transported through the pipe in the water pump system. The higher the lift, the higher the vertical distance that the liquid needs to overcome.

The water pump flow rate refers to the amount of liquid that the water pump delivers or processes per unit time. Flow is typically expressed in units of volume (e.g., cubic meters per hour, liters per second) or mass (e.g., kilograms per hour). The flow rate of the water pump determines the amount of its delivery capacity.

The working area of the water pump refers to the area where the water pump can stably work in the pressure and flow range. In this region, the water pump is able to provide the required flow and maintain a relatively stable output pressure.

The maximum water supply capacity of the water pump refers to the maximum amount of water that the water pump can deliver or supply to the system per unit time. The maximum water supply capacity depends on factors such as the design, model and operating conditions of the water pump.

Based on the above, the embodiments of the present application provide a method, an apparatus, a device, and a storage medium for controlling water pump operation, which can improve the accuracy of detecting the working area and the target working frequency in the water pump operation, so that the water pump accurately outputs the target flow. The control method of the operation of the water pump mainly comprises the steps of obtaining the pressure parameter of the current siphon structure and the target flow of the first water pump; then determining a working area of the first water pump under the pressure parameter; the working area is obtained according to a first lift curve of the first water pump in a first mode and a second lift curve of the first water pump in a second mode; then in the working area, determining a target frequency range of the first water pump according to the target flow; under the pressure parameter, acquiring the maximum flow range of each frequency point in the target frequency range of the first water pump; the maximum flow range is obtained according to a first effective cavitation allowance of the first water pump in a first mode and a second effective cavitation allowance of the first water pump in a second mode; and finally, selecting a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow in the target frequency range as the target working frequency. Therefore, the pressure parameter is used for representing the actual pipeline state of the siphon type water supply system in operation, the working area obtained according to the actual pressure parameter is more in line with the actual working state, the maximum flow range of each working frequency point under the actual pressure parameter is obtained by using the effective cavitation allowance of the first water pump, and further, more accurate and reliable target working frequency can be selected by using the maximum flow ranges of the working area and each working frequency point of the water pump, so that the water pump can accurately and reliably output the required target flow.

The embodiments of the present application provide a method, an apparatus, a device, and a storage medium for controlling water pump operation, and specifically, the following description is given by way of example, first describing a siphon type water supply system to which the method for controlling water pump operation in the embodiments of the present application is applied.

Referring to fig. 1, a schematic structural diagram of a siphon water supply system according to an embodiment of the present application is provided.

The siphon water supply 100 includes a first water pump 110, a second water pump 120, a siphon structure 130, and a reservoir 140, which are sequentially connected. The siphon structure 130 is in an inverted U shape, and the siphon structure 130 siphons fluid from the reservoir 140 and then sends the fluid to the first water pump 110 and the second water pump 120, and finally enters the user equipment to exchange heat. The user equipment may be an air conditioner or the like. The fluid in the reservoir 140 may be ice water or water.

The control method of the operation of the water pump in the embodiments of the present application will be further described based on the siphon type water supply system. In this embodiment, the control method of the water pump operation can be applied to a siphon type water supply system. Referring to fig. 2, an optional flowchart of a method for controlling operation of a water pump according to an embodiment of the present application is provided, and the method in fig. 2 may include, but is not limited to, steps S201 to S205. It should be understood that the order of steps S201 to S205 in fig. 2 is not particularly limited, and the order of steps may be adjusted, or some steps may be reduced or added according to actual requirements.

Step S201: and acquiring the pressure parameter of the current siphon structure and the target flow of the first water pump.

In some embodiments, the siphonic water supply will respond to a request from the first water pump of the requesting subject to output a target flow rate at which time a target operating frequency of the appropriate first water pump needs to be determined to output the target flow rate. The request object may be a user, an automatic control system, a water quality monitoring device, or the like. The most common object of making a request to a water supply is a user who needs to obtain water resources for life, industry or other purposes. The user can send a request to the water supply system through a switch or a valve and the like to control the flow or stop of water. The automatic control system may monitor and control the operation of the water supply system. The water level, pressure and other parameters are detected by the sensor, and the control system can send a request to the water supply system according to preset conditions and logic, such as starting or stopping the water pump, opening or closing the valve, adjusting the flow and the like. Some water supply systems may be connected to a remote monitoring and control platform through which the operation and maintenance personnel can remotely monitor and control the water supply system. On the platform, the service personnel can make requests to the water supply system, such as monitoring the water supply, adjusting the water supply pressure, etc. The water quality monitoring device is used for monitoring the water quality condition in the water supply system. Based on the monitoring results, a request may be made to the water supply, for example, to adjust a water treatment device, control a water quality parameter, etc. By sending a request to the water supply, a user or device can obtain the desired water supply, control the operation of the water supply, and ensure that the water supply provides water resources as desired. According to the actual demand and the system requirement, the water supply system is operated and controlled by selecting a proper control mode and equipment, so that the water supply efficiency can be improved, the resources can be saved, and the reliability and the safety of water supply can be ensured.

In some embodiments, when the siphon water supply is in an ideal state, i.e., the siphon structure is full of liquid as shown in fig. 1, the measured pressure of the top portion of the siphon structure is used as the pressure parameter P1 to reflect the water distribution state in the siphon structure. After further measurement of the liquid level Z1 of the reservoir and the liquid level Z2 in the siphon structure, the pressure parameter p1=the liquid level Z1 of the reservoir and the liquid level Z2 in the siphon structure are then measured.

In some embodiments, the siphon type water supply system is widely used in the engineering application field, but due to the reasons that the air tightness of the pipeline engineering installation at the siphon structure is poor, the process is accompanied by gas generation, the transportation and distribution fluid is wrapped with bubbles, the siphon negative pressure is increased to cause fine gas nuclei in the fluid to separate out, and the like, a part of gas accumulation phenomenon exists in a negative pressure pipe section (top end part) of the siphon structure in actual operation, so that the transportation and distribution capacity of the water pump is far lower than the design flow.

Referring to fig. 3, a schematic diagram of a siphon water supply system according to an embodiment of the present application is shown. At this time, the partial gas accumulation phenomenon exists at the top end part of the siphon structure, the pressure parameter P1, the liquid height Z1 of the reservoir and the liquid height Z2 in the siphon structure are measured, the pressure parameter P1> the liquid height Z1 of the reservoir and the liquid height Z2 in the siphon structure are found, and the partial gas accumulation phenomenon at the top end part of the siphon structure can be judged, namely, the siphon structure is in a state of not filling liquid. At this time, the actual working areas of the first water pump and the second water pump deviate from the working area in the ideal full liquid state of the siphon structure, so that the target working frequency obtained in the working area according to the conventional technology cannot enable the first water pump to output the target flow.

Based on the above, the pressure parameter condition of the current siphon structure needs to be obtained while the target flow demand of the first water pump is obtained, so that the accuracy of the subsequent determination of the working area of the first water pump is improved. The specific procedure for measuring the working area of the first water pump based on the pressure parameter provided in the embodiments of the present application will be further described below.

Step S202: an operating region of the first water pump under the pressure parameter is determined.

In some embodiments, after the current pressure parameter of the siphon structure is measured, the working area of the first water pump needs to be obtained according to the first lift curve of the first water pump in the first mode and the second lift curve of the first water pump in the second mode. The first mode is that the second water pump is turned off, and the first working frequency of the first water pump is changed between a first preset frequency and a second preset frequency; the second mode is that the second working frequency of the second water pump is a preset frequency value, and the first working frequency of the first water pump is changed between a third preset frequency and a fourth preset frequency; an operating region of the first water pump at the pressure parameter P1 is determined. It can be understood that the method for controlling the operation of the water pump provided by the embodiment of the application is mainly aimed at measuring the working area of the first water pump and determining the target working frequency of the first water pump according to the target flow of the first water pump, and the second water pump plays a role in assisting in measuring the working area of the first water pump. In this embodiment, the position between the first water pump and the second water pump is not excessively limited, but only adjacent ones. In addition, it can be understood that in this embodiment, the generation of the first preset frequency, the second preset frequency, the third preset frequency, the fourth preset frequency, and the preset frequency value is not excessively limited, and may be a value directly set according to actual needs or an optimal preset value obtained according to historical data. The first preset frequency and the second preset frequency provide a change interval for the first working frequency of the first water pump, and similarly, the third preset frequency and the fourth preset frequency provide a change interval for the first working frequency of the first water pump. In addition, the third preset frequency may be the first preset frequency, and the fourth preset frequency may be the second preset frequency.

In some embodiments, the first preset frequency is 0Hz, the second preset frequency is 50Hz, and the preset frequency value is 50Hz.

Referring to fig. 4, in order to more precisely obtain the operation region of the first water pump under the pressure parameter P1, the operation region of the first water pump under the pressure parameter is determined, including the following steps S401 to S403.

Step S401: under the pressure parameter, according to the first mode, the first working frequency of the first water pump is increased from the first preset frequency to the second preset frequency, the first lift of the first water pump is measured when the first working frequency changes, and a first lift curve is generated according to the first lift.

In some embodiments, for the pressure parameter P1, the second water pump is turned off according to the first mode, then the first operating frequency of the first water pump is increased from 25Hz to 50Hz, the first branch flow and the first head of the first water pump when the first operating frequency is changed are measured, a first head curve is obtained according to all the first heads and the first branch flow, and the first head curve is used as the lower limit of the operating area of the first water pump.

Step S402: under the pressure parameter, according to the second mode, the first working frequency of the first water pump is increased from the third preset frequency to the fourth preset frequency, and the second lift of the first water pump is measured when the first working frequency changes; and generating a second lift curve according to the second lift.

In some embodiments, for the pressure parameter P1, according to the second mode, the second water pump is operated at a second operating frequency of 50Hz, then the first operating frequency of the first water pump is increased from 25Hz to 50Hz, and the second branch flow rate and the second head of the first water pump when the first operating frequency is changed are measured, and a second head curve is obtained according to all the second heads and the second branch flow rate, and the second head curve is taken as the upper limit of the operating area of the first water pump.

Step S403: connecting the starting points of the first lift curve and the second lift curve to obtain a first connecting line, connecting the ending points of the first lift curve and the second lift curve to obtain a second connecting line, and obtaining a working area based on the first lift curve, the second lift curve, the first connecting line and the second connecting line.

In some embodiments, based on the first lift curve and the second lift curve obtained under the pressure parameter P1, a first connection line is obtained by connecting the start points of the first lift curve and the second lift curve, and a second connection line is obtained by connecting the end points of the first lift curve and the second lift curve. Then, the working area of the first water pump under the pressure parameter P1 can be obtained according to the first lift curve, the second lift curve, the first connecting line and the second connecting line.

Referring to fig. 5, a schematic simulation diagram of a water pump working area according to an embodiment of the present application is provided. The solid line frame is the working area of the first water pump measured under the condition that the siphon structure is in a full liquid state as shown in fig. 1, the pressure parameter P1 at the moment is-2.4 m, and six points in each line correspond to the branch flow and the pump lift of the first water pump when the first working frequency is 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz from left to right; the dashed box is the working area of the first water pump measured when the pressure parameter P1 is-1.4 m and the six points in each line correspond to the branch flow and the pump lift of the first water pump when the first working frequencies are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz from left to right in the state that the siphon structure shown in fig. 3 is in a non-full state. It is obvious that when the siphon structure is in a state of not being full of liquid, the actual working area of the first water pump is lower than the working area in an ideal state (i.e. when the siphon structure is in a state of being full of liquid), so that if the target working frequency of the first water pump is selected according to the working area measured in the ideal state, the target flow required in the actual situation is likely not to be achieved. Therefore, the working area of the first water pump under the pressure parameter needs to be measured according to the actual pressure parameter, and further the target operating frequency corresponding to the target flow can be determined more accurately.

In some embodiments, the working area of the first water pump may be measured for all the pressure parameters P1 in advance, and a working lookup table for storing the working areas of the first water pump for all the pressure parameters P1 is built, then in actual working, after responding to the requirement of the target flow, the current pressure parameter P1 is measured, and then the working area of the first water pump corresponding to the pressure parameter P1 is found in the working lookup table, so as to quickly determine the target working frequency, and further accurately and quickly make the first water pump output the required target flow.

Step S203: in the working area, a target frequency range of the first water pump is determined according to the target flow.

In some embodiments, the target operating frequency required for the first water pump to output the target flow is obtained more accurately. After the corresponding working area of the first water pump is obtained according to the current pressure parameter P1, determining a target frequency range corresponding to the target flow which can be output by the first water pump in the working area, and then determining the target working frequency of the first water pump in the target frequency range. The step of determining the target frequency range from the operating region will be further described below.

Therefore, in the operation region, the target frequency range of the first water pump is determined according to the target flow rate, including the following steps S601 to S603.

Step S601: and determining a first intersection point and a second intersection point on a boundary line of the working area according to the target flow.

Step S602: and determining a first target frequency according to the first target lift corresponding to the first intersection point, and determining a second target frequency according to the second target lift corresponding to the second intersection point.

Step S603: the target frequency range is constructed from the first target frequency and the second target frequency.

In some embodiments, after the corresponding working area of the first water pump is obtained according to the current pressure parameter P1, according to the target flow, a first intersection point and a second intersection point can be determined on a boundary line of the working area, further, a first target lift can be determined according to the first intersection point, and meanwhile, a second target lift can be determined according to the second intersection point; then according to the frequency conversion characteristic of the first water pump, the first target frequency corresponding to the first target lift and the second target frequency corresponding to the second target lift can be directly obtained. Then, a target frequency range corresponding to the target flow rate can be obtained by the first water pump under the pressure parameter P1 based on the first target frequency and the second target frequency, so that the target working frequency is properly selected in the target frequency range, and the first water pump can accurately output the target flow rate.

Referring to fig. 7, a schematic diagram of still another simulation of a water pump operating area according to an embodiment of the present application is shown, where the operating area shown in fig. 7 is the operating area of the first water pump measured when the pressure parameter p1= -1.4 m. When responding to the target flow demand of 800 ((m 3)/h), a first intersection point and a second intersection point with the abscissa corresponding to the target flow of 800 ((m 3)/h) are determined from the working area, and a first target lift and a second target lift are determined according to the ordinate of the first intersection point and the second intersection point, so that a first target frequency and a second target frequency are determined, and a target frequency range is obtained.

In addition, the maximum water supply capacity of the first water pump in the siphon type water supply system is also affected by partial air accumulation in the siphon structure, and when the partial air accumulation phenomenon occurs in the siphon structure, the maximum water supply capacity of the first water pump is reduced, that is, when the siphon structure is in a state of not being full of water as shown in fig. 3, such as the maximum water supply capacity of the first water pump in a state of being full of water as shown in fig. 1. Thus, there may occur a case where the first water pump is operated at a partial frequency in the target frequency range, and the target flow rate cannot be outputted due to an insufficient maximum water supply capacity. Thus, the determination of the target operating frequency requires a maximum water supply capacity of the first water pump in combination with the current pressure parameter P1.

Step S204: and acquiring the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter.

In some embodiments, the maximum flow range is derived from a first effective cavitation margin of the first water pump in the first mode and a second effective cavitation margin in the second mode. After the target frequency range that the first water pump meets the target flow under the pressure parameter P1 is obtained, a maximum flow range of the first water pump running at each frequency point in the target frequency range under the pressure parameter P1 is obtained according to the first mode and the second mode, wherein the maximum water supply capacity of the first water pump running at each frequency point is taken as the maximum flow range. The specific steps for obtaining the maximum flow range for the first water pump to operate at each frequency point will be further described below.

It is understood that the effective cavitation margin of the water pump refers to the lowest pressure value at which the water pump is operated, allowing the presence of gas or vapor in the liquid. When the gas or vapor pressure in the liquid is below the effective cavitation margin, cavitation of the pump may occur, resulting in reduced or even damaged pump performance. The effective cavitation margin is generally related to the design and manufacture of the water pump, and its value depends on the structure and material of the pump. When a water pump is selected, its effective cavitation margin needs to be determined based on the specific operating conditions and the pump performance curve.

Therefore, referring to fig. 8, a maximum flow rate range of each frequency point in the target frequency range of the first water pump under the pressure parameter is obtained, including the following steps S801 to S804.

Step S801: under the pressure parameter, according to a first mode, calculating a first water pump flow and a first effective cavitation allowance corresponding to each frequency point between a first target frequency and a second target frequency, and generating a first flow curve according to the first water pump flow and the first effective cavitation allowance.

In some embodiments, based on the current pressure parameter P1, the second water pump is stopped according to the first mode, and then the first operating frequency of the first water pump is increased from the first target frequency to the second target frequency, a first water pump flow rate (i.e., a bypass flow rate of the first water pump) and a first effective cavitation margin corresponding to each frequency point are generated, and a first flow rate curve is generated based on the first water pump flow rates and the first effective cavitation margins corresponding to all frequency points.

Step S802: and under the pressure parameter, calculating a second water pump flow and a second effective cavitation allowance corresponding to each frequency point between the first target frequency and the second target frequency according to the second mode, and generating a second flow curve according to the second water pump flow and the second effective cavitation allowance.

In some embodiments, based on the current pressure parameter P1, according to the second mode, the second operating frequency of the second water pump is operated at a preset frequency value, and then in the process of lifting the first operating frequency of the first water pump from the first target frequency to the second target frequency, the second water pump flow rate (i.e. the bypass flow rate of the first water pump) and the second effective cavitation allowance corresponding to each frequency point are generated, and a second flow curve is generated based on the second water pump flow rates and the second effective cavitation allowance corresponding to all frequency points.

Step S803: and obtaining a pump cavitation margin curve corresponding to each frequency point.

Step S804: and determining a third intersection point and a fourth intersection point of the pump cavitation allowance curve, the first flow rate curve and the second flow rate curve.

In some embodiments, after the first flow curve and the second flow curve are obtained, a pump cavitation margin curve corresponding to each frequency point is obtained according to structural characteristics of the siphon-type water supply system. And then determining the maximum flow range of the first water pump running at each frequency point according to the third intersection point and the fourth intersection point of the pump cavitation allowance curve and the first flow curve and the second flow curve of each frequency point and further based on the third intersection point and the fourth intersection point. The lower limit value of the maximum flow range is the first water pump flow rate corresponding to the third intersection point, and the upper limit value of the flow range is the second water pump flow rate corresponding to the fourth intersection point.

It will be appreciated that the pump cavitation margin curve (NPSHr cut) is a curve describing the net positive pressure intake height (NPSHr) required of the pump at different flows. The net positive pressure intake height refers to the additional net positive pressure height required at the inlet of the pump at a given pressure to prevent cavitation. Pump cavitation margin curves are typically used to evaluate the cavitation performance of the pump and to select an appropriate pump operating point.

Referring to fig. 9, a simulation diagram of a cavitation margin curve of a water pump according to an embodiment of the present application is shown. The two marked solid lines are respectively in a state that the siphon structure is full of liquid (as shown in fig. 1), namely, under the condition that the pressure parameter P1= -2.4m, the first water pump is in the corresponding effective cavitation allowance curves (namely, a first flow curve and a second flow curve) of the two working modes; the two marked dotted lines are respectively in a state that the siphon structure is not full of liquid (as shown in fig. 3), namely, under the condition that the pressure parameter P1= -1.4m, the first water pump is in an effective cavitation allowance curve (namely, a first flow curve and a second flow curve) corresponding to two working modes, wherein six points in each line are from left to right corresponding to a first water pump flow (or a second water pump flow) and a first effective cavitation allowance (or a second effective cavitation allowance) of the first water pump when the first working frequencies are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50 Hz; in addition, the unbrked solid line corresponds to a pump cavitation margin curve corresponding to a frequency point of 50 Hz. It is obvious that when the siphon structure is in a state of not being full of liquid, the actual maximum water supply capacity (i.e. the bypass flow of the first water pump) of the first water pump is smaller than the maximum water supply capacity (i.e. the bypass flow of the first water pump) in an ideal state (i.e. when the siphon structure is in a state of being full of liquid), so if the target operating frequency of the first water pump is selected according to the operating area measured in the ideal state, the first water pump operates at the target operating frequency to correspond to the maximum water supply capacity, and the target flow required in the actual situation is likely not to be reached. Therefore, the working area of the first water pump under the pressure parameter is measured according to the actual pressure parameter, and the maximum water supply capacity of each frequency point of the first water pump under the pressure parameter is measured according to the actual pressure parameter, so that the target operating frequency can be determined more reliably to output the target flow.

In some embodiments, in order to more accurately measure the maximum water supply capacity of the first water pump operating at each frequency point under the current pressure parameter, it is necessary to more accurately determine the third and fourth intersection points of the pump cavitation margin curve with the first and second flow curves, and the determination steps of the third and fourth intersection points will be further described below.

Therefore, referring to fig. 10, third and fourth intersections of the pump cavitation margin curve, the first and second flow rate curves are determined, including the following steps S1001 to S1004.

Step S1001: and judging whether the first flow curve and the pump cavitation allowance curve are intersected or not, and taking the intersection point of the first flow curve and the pump cavitation allowance curve as a third intersection point corresponding to the frequency point according to the first intersection judgment result.

Step S1002: or determining the third water pump flow of the frequency point in the first flow curve, and taking the coordinate point corresponding to the third water pump flow in the pump cavitation allowance curve as a third intersection point corresponding to the frequency point.

In some embodiments, after the first flow curve, the second flow curve and the pump cavitation margin curve corresponding to each frequency point are obtained, determining whether there is an intersection between the pump cavitation margin curve of each frequency point and the first flow curve in sequence, if so, taking the intersection between the first flow curve and the pump cavitation margin curve of the frequency point as a third intersection corresponding to the frequency point; if the first flow curve does not have the intersection, determining a third water pump flow corresponding to the frequency point, and taking a coordinate point corresponding to the third water pump flow in the pump cavitation allowance curve of the frequency point as a third intersection corresponding to the frequency point.

Step S1003: judging whether the second flow curve and the pump cavitation allowance curve are intersected or not, and according to a second intersection judgment result, intersecting the second flow curve and the pump cavitation allowance curve.

Step S1004: or determining the fourth water pump flow of the frequency point in the second flow curve, and taking the coordinate point corresponding to the fourth water pump flow in the pump cavitation allowance curve as a fourth intersection point corresponding to the frequency point.

In some embodiments, after the first flow curve, the second flow curve and the pump cavitation residual curve corresponding to each frequency point are obtained, judging whether there is an intersection between the pump cavitation residual curve of each frequency point and the second flow curve in sequence, if so, taking the intersection between the second flow curve and the pump cavitation residual curve of the frequency point as a fourth intersection corresponding to the frequency point; and if the position of the intersection is not found, determining a fourth water pump flow corresponding to the frequency point in the second flow curve, and taking a coordinate point corresponding to the fourth water pump flow in the pump cavitation allowance curve of the frequency point as a fourth intersection corresponding to the frequency point. Therefore, the third intersection point and the fourth intersection point corresponding to each frequency point are obtained more accurately, the maximum flow range of each frequency point of the first water pump under the pressure parameter P1 is obtained more accurately, and further the target working frequency capable of outputting the target flow can be determined more accurately.

Referring to fig. 11, a schematic diagram of still another simulation of a cavitation margin curve of a water pump according to an embodiment of the present application is shown. The two marked solid lines are a first flow curve and a second flow curve of the first water pump in two working modes under the condition that the siphon structure is not full of liquid, namely, the pressure parameter is-1.4 m. The solid line without the mark is a pump cavitation allowance curve corresponding to a 50Hz frequency point, and at the moment, the first flow curve and the pump cavitation allowance curve do not intersect, so that a third water pump flow corresponding to the 50Hz frequency point (namely, the branch flow of the first water pump) is selected from the first flow curve, and then a coordinate point corresponding to the third water pump flow is selected from the pump cavitation allowance curve of the 50Hz frequency point as a third intersection point of the 50Hz frequency point; and because the second flow curve and the pump cavitation allowance curve have the intersection place, the intersection point of the second flow curve and the pump cavitation allowance curve is taken as a fourth intersection point of the 50Hz frequency point. And then, according to the water pump flow range between the third intersection point and the fourth intersection point, obtaining the maximum flow range when the first water pump operates at the first operating frequency of 50Hz, wherein the maximum water supply capacity when the first water pump operates at the first operating frequency of 50Hz falls in the maximum flow range.

In some embodiments, measurement of the maximum flow range of the first water pump running at each frequency point may be performed for all the pressure parameters P1 in advance, and a water supply capacity lookup table is established to store all the pressure parameters P1 and the maximum flow range of the first water pump at all the frequency points, then in actual operation, after responding to the demand of the target flow, the current pressure parameter P1 is measured, and then a frequency point corresponding to the maximum flow range of the target flow under the pressure parameter P1 is found in the operation lookup table, so that the target operating frequency that the maximum water supply capacity meets the target flow from the first target flow range is accurately and quickly determined.

Step S205: and selecting a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow in the target frequency range as a target working frequency.

In some embodiments, after the target frequency range of the first water pump and the maximum flow range corresponding to each frequency point in the target frequency range are obtained based on the pressure parameter P1, in order to ensure that the first water pump can output the water supply amount meeting the target flow, a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow needs to be selected as the target working frequency, so as to improve the reliability of the operation control of the water pump.

In some embodiments, when the lower limit value of the maximum flow range corresponding to all frequency points in the target frequency range satisfying the target flow obtained according to the working area of the first water pump is smaller than the target flow under the current pressure parameter P1, that is, the partial air accumulation phenomenon in the siphon water supply system may be excessive at this time, it is necessary to further determine whether to execute the shutdown air discharge request. Therefore, referring to fig. 12, the control method for the operation of the water pump provided in the embodiment of the present application further includes the following steps S1201 to S1203.

Step S1201: and checking whether the target flow belongs to a preset normal flow range or not to obtain a first checking result.

Step S1202: and checking whether the first flow curve and/or the second flow curve belong to a preset safe flow range or not, and obtaining a second checking result.

Step S1203: and sending a shutdown exhaust request according to the first test result and the second test result.

In some embodiments, when the lower limit value of the maximum flow range corresponding to all frequency points in the target frequency range satisfying the target flow obtained according to the working area of the first water pump is smaller than the target flow under the current pressure parameter P1, it is first required to check whether the target flow is within the preset normal flow range, if the obtained target flow is not within the preset normal flow range, the target flow is an abnormal target flow, an error alert needs to be sent to the request object, and a new target flow request within the preset normal flow range is re-received. If the target flow range belongs to the preset normal flow range, whether the corresponding effective cavitation allowance and the water pump flow in the first flow curve and/or the second flow curve belong to the preset safe flow range or not needs to be further checked, if not, a shutdown exhaust request needs to be sent to a receiving position of a management party, so that the management party performs operations such as exhaust maintenance on the siphon type water supply system, and the reliability and the safety of water pump operation control are improved.

In some embodiments, after the target frequency range that the output of the first water pump meets the target flow rate based on the pressure parameter P1 is obtained, in order to reduce the cost of working energy consumption, a frequency point with lower cost of working energy consumption needs to be selected in the target frequency range to be used as the target working frequency for operation. Therefore, referring to fig. 13, a frequency point in which the lower limit value of the maximum flow rate range is greater than or equal to the target flow rate is selected as the target operating frequency within the target frequency range, further including the following steps S1301 to S1302.

Step S1301: the operating power consumption of each frequency point in the target frequency range is determined.

Step S1302: and selecting a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow and meeting the energy consumption cost index as a target working frequency in the target frequency range based on the operation power consumption.

In some embodiments, in order to reduce the working energy consumption cost of the siphon water supply system during working, after obtaining the target flow and obtaining the target frequency range meeting the target flow based on the pressure parameter P1, selecting a plurality of frequency points with the maximum water supply capacity meeting the target flow in the target frequency range, and determining the operation power consumption corresponding to each frequency point based on the water pump flow and the water pump lift of the first water pump corresponding to the frequency points; and then, based on the running power consumption, selecting a frequency point meeting an energy consumption cost index as a target working frequency, thereby reducing the working energy consumption cost of the siphoning type water supply system while realizing accurate water pump running control. In the embodiment of the present application, the generation of the energy consumption cost index is not excessively limited, and may be a fixed value, or may be the minimum operation power consumption of the operation power consumptions of a plurality of frequency points.

The embodiment of the application provides a control method, a device, equipment and a storage medium for water pump operation, which can improve the accuracy of detecting the working area and the target working frequency in the water pump operation, so that the water pump can accurately output the target flow. The control method of the operation of the water pump mainly comprises the steps of obtaining the pressure parameter of the current siphon structure and the target flow of the first water pump; then, determining a working area of the first water pump under the pressure parameter through a first lift curve of the first working mode and a second lift curve of the second working mode, and determining a target frequency range of the first water pump capable of outputting the target flow under the pressure parameter according to the target flow based on the working area; and then, acquiring a pump cavitation allowance curve corresponding to each frequency point in the target frequency range and a first flow curve and a second flow curve obtained by the first water pump according to the first working mode and the second working mode based on the pressure parameter to obtain a maximum flow range corresponding to each frequency point in the target frequency range, and selecting a frequency point with the lower limit value of the maximum flow range being greater than or equal to the target flow as the target working frequency so as to accurately output the target flow.

According to the control process of the water pump operation in the siphon type water supply system, the actual pipeline state of the siphon type water supply system in operation is characterized by utilizing the pressure parameter, the working area obtained according to the actual pressure parameter is more in line with the actual working state, so that the frequency range of the first water pump which can actually output the target flow in the actual pipeline state is obtained, meanwhile, the actual maximum water supply capacity of each working frequency of the first water pump in the actual pipeline state is determined by utilizing the effective cavitation allowance curve and the pump cavitation allowance curve, and therefore the working frequency of the first water pump which can actually output the target flow is obtained, and the accuracy and the reliability of the water pump operation control are improved.

The embodiment of the present application further provides a water pump operation control device, which can implement the above-mentioned water pump operation control method, and referring to fig. 14, the device 1400 includes:

an obtaining module 1410, configured to obtain a pressure parameter of a current siphon structure and a target flow of the first water pump;

a working area determination module 1420 for determining a working area of the first water pump under the pressure parameter; the working area is obtained according to a first lift curve of the first water pump in a first mode and a second lift curve of the first water pump in a second mode;

A frequency range determining module 1430 configured to determine a target frequency range of the first water pump according to the target flow rate in the working area;

the flow range determining module 1440 is configured to obtain a maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter; the maximum flow range is obtained according to a first effective cavitation allowance of the first water pump in a first mode and a second effective cavitation allowance of the first water pump in a second mode;

the target frequency determining module 1450 is configured to select, as the target operating frequency, a frequency point in the target frequency range, where the lower limit value of the maximum flow rate range is greater than or equal to the target flow rate.

The specific implementation manner of the water pump operation control device in this embodiment is basically the same as the specific implementation manner of the water pump operation control method, and will not be described herein.

The embodiment of the application also provides electronic equipment, which comprises:

at least one memory;

at least one processor;

at least one program;

the program is stored in the memory, and the processor executes the at least one program to realize the control method for the operation of the water pump. The electronic equipment can be any intelligent terminal including a mobile phone, a tablet personal computer, a personal digital assistant (Personal Digital Assistant, PDA for short), a vehicle-mounted computer and the like.

Referring to fig. 15, fig. 15 illustrates a hardware structure of an electronic device according to another embodiment, the electronic device includes:

the processor 1501 may be implemented by a general purpose CPU (central processing unit), a microprocessor, an application specific integrated circuit (ApplicationSpecificIntegratedCircuit, ASIC), or one or more integrated circuits, etc. for executing related programs to implement the technical solutions provided by the embodiments of the present application;

the memory 1502 may be implemented in the form of a ROM (read only memory), a static storage device, a dynamic storage device, or a RAM (random access memory). The memory 1502 may store an operating system and other application programs, and when the technical solutions provided in the embodiments of the present application are implemented by software or firmware, relevant program codes are stored in the memory 1502, and the processor 1501 invokes a control method for executing the water pump operation in the embodiments of the present application;

an input/output interface 1503 for inputting and outputting information;

the communication interface 1504 is configured to implement communication interaction between the device and other devices, and may implement communication in a wired manner (e.g., USB, network cable, etc.), or may implement communication in a wireless manner (e.g., mobile network, WIFI, bluetooth, etc.);

Bus 1505) for transferring information between components of the device (e.g., processor 1501, memory 1502, input/output interface 1503, and communication interface 1504);

wherein the processor 1501, the memory 1502, the input/output interface 1503 and the communication interface 1504 enable communication connection between each other within the device via the bus 1505.

The embodiment of the application also provides a storage medium, wherein the storage medium is a computer readable storage medium, and a computer program is stored in the storage medium, and when the computer program is executed by a processor, the control method for the operation of the water pump is realized.

The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The embodiments described in the embodiments of the present application are for more clearly describing the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application, and as those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

It will be appreciated by those skilled in the art that the technical solutions shown in the figures do not constitute limitations of the embodiments of the present application, and may include more or fewer steps than shown, or may combine certain steps, or different steps.

The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is merely a logical function division, and there may be another division manner in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing a program.

Preferred embodiments of the present application are described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the embodiments of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.

Claims

1. A control method for water pump operation, characterized in that it is applied to a siphonic water supply system comprising a siphonic structure, a first water pump and a second water pump connected in sequence, the method comprising:

2. The method of controlling operation of a water pump of claim 1, wherein the first mode is when the second water pump is off, and wherein the first operating frequency of the first water pump varies between a first predetermined frequency and a second predetermined frequency; the second mode is that the second working frequency of the second water pump is a preset frequency value, and the first working frequency of the first water pump is changed between a third preset frequency and a fourth preset frequency; the determining the working area of the first water pump under the pressure parameter comprises:

3. The method of controlling operation of a water pump according to claim 1, wherein determining a target frequency range of the first water pump in the operating region from the target flow rate comprises:

4. The method of controlling operation of a water pump according to claim 1, wherein the target frequency range includes a first target frequency and a second target frequency; the obtaining the maximum flow range of each frequency point in the target frequency range of the first water pump under the pressure parameter includes:

Acquiring a pump cavitation margin curve corresponding to each frequency point;

5. The method of controlling operation of a water pump according to claim 4, wherein said determining third and fourth intersections of said pump cavitation margin curve, said first flow rate curve and said second flow rate curve comprises:

6. The method for controlling operation of a water pump according to claim 5, wherein when the lower limit value of the maximum flow rate range of all the frequency points is smaller than the target flow rate, the method further comprises:

7. The method according to claim 1, wherein selecting the frequency point in the target frequency range where the lower limit value of the maximum flow rate range is greater than or equal to the target flow rate as the target operating frequency includes:

and selecting the frequency point which meets the energy consumption cost index as the target working frequency, wherein the lower limit value of the maximum flow range is larger than or equal to the target flow in the target frequency range based on the operation power consumption.

8. The utility model provides a water pump operation controlling means, its characterized in that, water pump operation controlling means is applied to hydrocone type water supply system, hydrocone type water supply system includes siphon structure, first water pump and the second water pump that connects gradually, water pump operation controlling means includes:

And the target frequency determining module is used for selecting the frequency point with the lower limit value of the maximum flow range larger than or equal to the target flow in the target frequency range as a target working frequency.

9. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the method of controlling the operation of the water pump according to any one of claims 1 to 7.

10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a method of controlling the operation of a water pump according to any one of claims 1 to 7.