Water pump control method, device and equipment

Abstract

The invention relates to a water pump control method, device and equipment, and belongs to the technical field of water pump control. A first straight line with a control parameter as an abscissa and motion power as an ordinate and a second straight line with the control parameter as the abscissa and the operation rotating speed as the ordinate are constructed in advance; and the current maximum operation power and the current maximum operation rotating speed are obtained through the current control parameters, and the maximum operation power and the maximum operation rotating speed serve as divisor conditions to control operation of the target water pump. Wherein the control parameters are updated in real time, so that accurate control over the water pump can be achieved, the output electric signal quantity of the controller is directly mapped to the minimum rotating speed to the maximum rotating speed under the pipeline load at the moment, and therefore the electric signal output by the control unit is linearly adjustable in the whole range; the stability and adaptability of the system are enhanced; system debugging personnel can conveniently and quickly adjust and stabilize the system; and meanwhile, the working redundancy of the system can be conveniently evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump control, and in particular to a water pump control method, device and equipment. Background Art

[0002] A water pump is a machine that transports liquid or pressurizes liquid and can be used in many aspects. In the relevant technology, when controlling a water pump, it can usually be roughly divided into three control systems according to application requirements: the first is a flow or pressure control system composed of multiple AC water pump bodies, pressure or flow sensors, and pressure or flow control units; the second is a flow and pressure control system composed of multiple permanent magnet synchronous motor water pumps, pressure and flow detection sensors, and pressure and flow control units; the third is a temperature control system composed of a permanent magnet synchronous motor, a temperature sensor, a flow sensor, and a temperature control unit.

[0003] When the first control system is in operation, the control method is generally as follows: in pressure control, the pressure sensor detects the pressure of the liquid in the pipeline, converts the pressure value into an electrical signal, and transmits it to the pressure control unit; the pressure control unit detects the electrical signal sent back by the sensor, converts it into a real pressure value, and then adjusts the number of water pumps turned on by comparing the system demand pressure. For example, when the demand pressure is greater than the real-time pressure, the control unit will turn off a water pump, and vice versa, it will turn on a water pump until the system demand pressure and the real-time pressure value are within a certain allowable range, and the system is stable. The flow control is also the same principle. At this time, the sensor is replaced with a flow sensor. The flow sensor converts the detected real-time flow into an electrical signal, and the control unit then analyzes the electrical signal of the sensor to obtain the real flow value. The control unit gives the control amount by comparing the given demand flow value with the real flow value. The control amount determines the number of water pumps that need to be turned on.

[0004] The second control system has the same pressure and flow control method as the first one. Compared with the first one, the AC water pump motor is replaced with a permanent magnet water pump motor to achieve stepless speed regulation. Therefore, when controlling the flow and pressure, it is no longer similar to the gear control effect, and the pressure or flow can only be adjusted by changing the number of running water pumps. Instead, more precise flow and pressure regulation can be achieved by adjusting the speed of the permanent magnet motor.

[0005] The third control system is mainly used in thermal management, such as building heating in winter and heat dissipation of automotive power batteries. The temperature sensor collects the real-time temperature of the room, converts the temperature value into an electrical signal and sends it to the temperature control unit; the temperature control unit compares the real-time temperature with the target temperature value to output the flow signal of the water pump. The control signal is usually represented by a 0-10V voltage signal or a 4-20mA current signal. The permanent magnet synchronous water pump usually integrates a flow sensor interface to sample the real-time flow, and adjusts its own speed through the flow PI control inside the water pump, and then adjusts its output flow to make its flow reach the target demand flow. In building heating, the speed of the water pump is different, the flow delivered is different, and the heat released into the building is different, so as to finally control the temperature of the room in the building. In this control process, the flow control signal output by the temperature controller, and the most direct control quantity of the water pump is the speed of the water pump, which is converted into flow through the speed, and then the flow is converted into heat to achieve temperature control. The thermal management of the power battery of the car is also the same idea. By controlling the speed of the water pump, the flow of the system is changed, and the target temperature of the power battery is adjusted.

[0006] Among the above three control systems, the first control method, because the output of the control is the number of times the water pump is turned on and off, causes the target pressure or flow to be stepped, and cannot accurately reach the given target value. Usually the real-time value is one step larger than the given target value, resulting in energy waste. Although the second and third control methods can solve the problem of the first control method, in the second control system, the output electrical signal of the control unit is directly converted into a speed signal, which may not be able to linearly map the controller output 0-10V corresponding to the minimum speed to the maximum speed of the water pump, thereby increasing the difficulty of theoretical analysis.

[0007] Therefore, how to achieve precise regulation and control of the water pump is a technical problem that needs to be solved urgently in the prior art. Summary of the invention

[0008] In view of this, an object of the present invention is to provide a water pump control method, device and equipment to overcome the current problem that the water pump cannot be accurately adjusted.

[0009] To achieve the above objectives, the present invention adopts the following technical solutions:

[0010] In one aspect, a water pump control method comprises:

[0011] Acquire control parameters of a target water pump, wherein the control parameters include a maximum control parameter;

[0012] Performing cubic calculation on the maximum control parameter to obtain a target maximum control parameter;

[0013] Substituting the target maximum control parameter as the horizontal coordinate into the pre-constructed first straight line to obtain the maximum operating power; and substituting the maximum control parameter as the horizontal coordinate into the pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate;

[0014] The operation of the target water pump is controlled with the maximum operating power and the maximum operating speed as approximate conditions.

[0015] Furthermore, it also includes:

[0016] Obtaining a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter;

[0017] Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter;

[0018] The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line;

[0019] The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

[0020] Furthermore, the control parameters include VSP parameters.

[0021] Further, the controlling the operation of the target water pump using the maximum operating power and the maximum operating speed as approximate conditions includes:

[0022] The maximum operating power and the maximum operating speed are respectively updated to replace the current maximum operating power and the current maximum operating speed set in the target water pump, and the operation of the target water pump is controlled with the updated current maximum operating power and the current maximum operating speed.

[0023] In another aspect, a water pump control device comprises:

[0024] An acquisition module, used for acquiring control parameters of a target water pump, wherein the control parameters include a maximum control parameter;

[0025] A calculation module, used for performing a cubic calculation on the maximum control parameter to obtain a target maximum control parameter;

[0026] A substitution module is used to substitute the target maximum control parameter as the horizontal coordinate into a pre-constructed first straight line to obtain the maximum operating power; and substitute the maximum control parameter as the horizontal coordinate into a pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate;

[0027] The control module is used to control the operation of the target water pump by taking the maximum operating power and the maximum operating speed as approximate conditions.

[0028] Furthermore, it also includes:

[0029] A construction module is used to obtain a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter;

[0030] Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter;

[0031] The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line;

[0032] The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

[0033] In another aspect, a water pump control device comprises a processor and a memory, wherein the processor is connected to the memory:

[0034] Wherein, the processor is used to call and execute the program stored in the memory;

[0035] The memory is used to store the program, and the program is at least used to execute any one of the water pump control methods described above.

[0036] On the other hand, a water pump comprises a water pump motor and the water pump control device described above; the water pump control device is connected to the water pump motor.

[0037] The water pump control method, device and equipment provided by the embodiment of the present invention pre-constructs a first straight line with control parameters as the horizontal coordinate and motion power as the vertical coordinate, and a second straight line with control parameters as the horizontal coordinate and operating speed as the vertical coordinate, so as to obtain the current maximum operating power and the maximum operating speed through the current control parameters, and use the maximum operating power and the maximum operating speed as divisor conditions to control the operation of the target water pump. Among them, the control parameters are updated in real time, so that the water pump can be accurately controlled, and the output electrical signal of the controller is directly mapped to the minimum speed to the maximum speed under the pipeline load at this time, so that the full range of the electrical signal output by the control unit is linearly adjustable; the stability and adaptability of the system are enhanced; it is convenient for system debuggers to quickly adjust the stable system; and it is convenient to evaluate the redundancy of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a flow head curve and flow power curve of a speed adjustable water pump at different speeds in the prior art;

[0040] Figure 2 It is a schematic diagram of the relationship between VSP and speed of a water pump in the prior art when the L1 and L3 pipelines have different loads;

[0041] Figure 3 A schematic flow chart of a water pump control method provided by an embodiment of the present invention;

[0042] Figure 4 A schematic diagram of the relationship between control parameters and rotation speed after adopting the water pump control method provided by an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of the structure of a water pump control device provided by an embodiment of the present invention;

[0044] Figure 6 A schematic structural diagram of a water pump control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0046] As described in the background technology, there are three control systems. The first control method, because the output of the control is the number of times the water pump is turned on and off, causes the target pressure or flow rate to be stepped, and cannot accurately reach the given target value. Usually, the real-time value is one step larger than the given target value, resulting in energy waste. Although the second and third control methods can solve the problem of the first control method, in the second control system, the output electrical signal of the control unit is directly converted into a speed signal, which may not be able to linearly map the controller output 0-10V to the minimum speed to the maximum speed of the water pump, thereby increasing the difficulty of theoretical analysis.

[0047] Therefore, how to achieve precise regulation and control of the water pump is a technical problem that needs to be solved urgently in the prior art.

[0048] The following example illustrates the problems that occur when speed control is performed with a VSP voltage of 0-10V or a current signal of 4-20mA in traditional control. In VSP mode, 0V represents zero speed of the water pump, and 10V represents the maximum speed of the water pump (in practice, VSP control has a hysteresis, and generally 0.5V-9.5V is used as linear control. Here, 0-10V corresponds to the minimum to maximum speed as an example).

[0049] The flow head curve and flow power curve of the speed adjustable water pump at different speeds are as follows: Figure 1 As shown. Constant speed 1>constant speed 2>constant speed 3. The higher the speed, the higher the head at low flow. When the flow increases, the curve with higher speed reaches the power limit point first. Under different pipeline loads, the maximum flow that the system can achieve is different. Assuming working condition L1, the maximum flow that can be achieved by the current load is Q1. Working condition L2, the maximum flow that can be achieved by the current pipeline is Q3. The two working conditions of L1 and L2 are used to illustrate the shortcomings of the current speed regulation mode.

[0050] When the system operates in L1 condition, the linear relationship between the input voltage of VSP and the speed can be achieved within the full load range, such as Figure 2 . When the system is working in L2 condition, when VSP linearly increases the speed to the system flow rate of Q3. At this time, the water pump enters the power limit state. Therefore, if the VSP voltage continues to increase, the speed of the water pump will not increase. At this time, the VSP voltage is 5V. The 0-5V range represents the range that can be linearly adjusted, while the 5-10V speed is constant and will not increase. Because this feature is related to the load characteristics of the pipeline. Therefore, the controller has the following problems:

[0051] 1. For the system's temperature controller or flow controller, its PI control parameters are difficult to adjust. Under unknown pipeline characteristics, it is impossible to linearly map the controller's output 0-10V corresponding to the minimum speed to the maximum speed of the water pump. This increases the difficulty of theoretical analysis.

[0052] 2. The time it takes for the controller to reach the control target of temperature, flow or pressure becomes longer. The linear range of the actual output signal of the controller becomes narrower, resulting in a longer time for the controller to stabilize.

[0053] 3. The adaptability and robustness of the controller deteriorate. Often, when the pipeline characteristics change, the system becomes unstable.

[0054] 4. It is inconvenient for the system controller to evaluate the current load of the system. When the system is stable, the signal output by the controller is stable at 3.8V, which usually means that there is still a part of redundancy in 3.8-10V, which can be adjusted. However, after 5V, the speed of the water pump is limited by the maximum power and cannot be increased. Therefore, the actual redundancy should be only 1.2V.

[0055] In the third control, the flow sensor is added to achieve accurate flow control of the internal control loop, but the pump may still fail to reach the target flow due to power limitation, so the problems in the second control form still exist.

[0056] Based on this, the embodiment of the present invention provides a water pump control method, device and equipment to achieve precise control of the water pump, directly mapping the output electrical signal of the controller to the minimum speed to the maximum speed under the pipeline load at this time, thereby achieving linear adjustment of the full range of the electrical signal output by the control unit. The stability and adaptability of the system are enhanced; it is convenient for system debuggers to quickly adjust the stable system; and it is also convenient to evaluate the redundancy of the system operation.

[0057] Figure 3A flow chart of a water pump control method provided by an embodiment of the present invention, see Figure 3 , this embodiment may include the following steps:

[0058] Step S101: Acquire control parameters of a target water pump, wherein the control parameters include a maximum control parameter.

[0059] It should be noted that any water pump can be defined as a target water pump, thereby returning the control parameters of the target water pump. The target water pump includes a water pump motor and a control unit (for example, a water pump control device), and an embedded program or user-defined logic can be executed in the water pump unit. In this embodiment, the water pump control method provided in this embodiment can be used. The control unit can collect the power of the water pump operation and can receive the speed control signal issued by the upper controller (the speed control signal can be the control parameter in this application).

[0060] For example, the control parameters include VSP parameters. VSP parameters refer to the speed regulation signal output by the frequency converter, usually 0-10V or 4-20mA, and the speed of the motor is controlled according to this signal.

[0061] Step S102: performing a cubic calculation on the maximum control parameter to obtain a target maximum control parameter.

[0062] For example, the maximum control parameter can be 10V or 20mA. After obtaining the maximum control parameter, a cubic mathematical calculation is performed on it to obtain the target maximum control parameter. For example, the target maximum control parameter can be 10 3 or 20 3 .

[0063] Step S103, substitute the target maximum control parameter as the horizontal coordinate into a pre-constructed first straight line to obtain the maximum operating power; and substitute the maximum control parameter as the horizontal coordinate into a pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate.

[0064] In the present application, a first straight line and a second straight line can be pre-constructed. The first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate.

[0065] By substituting the target maximum control parameter as the horizontal coordinate into the pre-constructed first straight line, the maximum operating power is obtained; by substituting the maximum control parameter as the horizontal coordinate into the pre-constructed second straight line, the maximum operating speed is obtained.

[0066] Step S104: Controlling the operation of the target water pump using the maximum operating power and the maximum operating speed as approximate conditions.

[0067] After the maximum operating power and the maximum operating speed are obtained, the operation of the target water pump is controlled with the obtained maximum operating power and the maximum operating speed as constraints.

[0068] In some embodiments, the controlling the operation of the target water pump using the maximum operating power and the maximum operating speed as approximate conditions includes:

[0069] The maximum operating power and the maximum operating speed are respectively updated to replace the current maximum operating power and the current maximum operating speed set in the target water pump, and the operation of the target water pump is controlled with the updated current maximum operating power and the current maximum operating speed.

[0070] For example, the speed loop control algorithm and the power loop control algorithm can be pre-stored in the control unit, and the given value of the speed is defined as Speed_ref, and the limited value of the real-time power is power_max. Not limited to the speed loop PI controller or other speed loop control algorithms, the power control can achieve that when the speed loop is working, the real-time power will not exceed the given value of the power control. The maximum operating power and the maximum operating speed can be calculated and updated to power_max and Speed_ref.

[0071] It can be understood that the technical solution of this embodiment is adopted, by pre-constructing a first straight line with control parameters as the horizontal coordinate and motion power as the vertical coordinate, and a second straight line with control parameters as the horizontal coordinate and operating speed as the vertical coordinate, so as to obtain the current maximum operating power and the maximum operating speed through the current control parameters, and use the maximum operating power and the maximum operating speed as approximate conditions to control the operation of the target water pump. Among them, the control parameters are updated in real time, so that the water pump can be accurately controlled, and the output electrical signal of the controller is directly mapped to the minimum speed to the maximum speed under the pipeline load at this time, so that the full range of the electrical signal output by the control unit is linearly adjustable; the stability and adaptability of the system are enhanced; it is convenient for system debuggers to quickly adjust the stable system; and it is convenient to evaluate the redundancy of the system work.

[0072] In some embodiments, it also includes:

[0073] Obtaining a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter;

[0074] Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter;

[0075] The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line;

[0076] The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

[0077] For example, a water pump that needs to be controlled can be used as a sample water pump, or water pumps of the same batch and the same type can be used as sample water pumps to train to obtain the first straight line and the second straight line, so as to use them during the water pump operation phase.

[0078] During the initialization phase, you can perform the following steps:

[0079] 1. Obtain the maximum operating power and minimum operating power of the water pump.

[0080] 2. Obtain the maximum VSP given value and minimum VSP given value of the water pump.

[0081] 3. Obtain the minimum speed and maximum allowable operating speed of the water pump at 0 flow.

[0082] 4. Through 1 and 2, the maximum VSP given value and the minimum VSP given value in 2 are cubed and combined into two points. The first point (the cube of the minimum VSP given value, the minimum operating power), the second point (the cube of the maximum VSP given value, the maximum operating power).

[0083] 5. Combine the values ​​in 2 and 3 to get two points: The first point (VSP minimum reference, minimum operating speed) and the second point (VSP maximum reference, maximum operating speed).

[0084] 6. Perform straight line fitting on the two points in 5. Calculate the straight line with VSP as the X-axis and the speed as the Y-axis. Its slope is defined as K0 and its intercept is defined as B0.

[0085] 7. Perform a straight line fit for the two points in 4. Calculate a straight line with the cube of VSP as the X-axis and power as the Y-axis, and define its slope as K1 and intercept B1.

[0086] During the run phase, perform the following steps:

[0087] 1. Get the real-time given signal VSP value of the water pump.

[0088] 2. Raise the VSP value in 1 to the cube.

[0089] 3. Raise the result in 2 to the cube and substitute it into the K1 and B1 values ​​calculated in the initialization phase to find the maximum power currently allowed.

[0090] 4. Substitute the result in 2 into the speed K0 and speed B0 values ​​calculated in the initialization phase to find the maximum speed currently allowed.

[0091] 5. According to the calculations in 3 and 4, the maximum speed and the maximum allowable power value are respectively passed to the Speed_ref and power_max of the water pump.

[0092] Figure 4 This is a schematic diagram of the relationship between control parameters and rotation speed after adopting the water pump control method provided by an embodiment of the present invention.

[0093] It is understandable that the technical solution provided in this embodiment is adopted, referring to Figure 4 , under different pipeline loads, the 0-10V input of the VSP mode can achieve a linear increase in the pump capacity. At this time, the relationship between VSP and speed will be dynamically adjusted according to the load.

[0094] Based on a general inventive concept, an embodiment of the present invention further provides a water pump control device for implementing the above method embodiment.

[0095] Figure 4 A schematic diagram of a water pump control device according to an embodiment of the present invention is shown in FIG. Figure 4 The device provided by the embodiment of the present invention may include the following structure:

[0096] An acquisition module 41 is used to acquire control parameters of a target water pump, wherein the control parameters include a maximum control parameter;

[0097] A calculation module 42, configured to perform a cubic calculation on the maximum control parameter to obtain a target maximum control parameter;

[0098] The substitution module 43 is used to substitute the target maximum control parameter as the horizontal coordinate into a pre-constructed first straight line to obtain the maximum operating power; and substitute the maximum control parameter as the horizontal coordinate into a pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate;

[0099] The control module 44 is used to control the operation of the target water pump using the maximum operating power and the maximum operating speed as approximate conditions.

[0100] In some embodiments, it also includes:

[0101] A construction module is used to obtain a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter;

[0102] Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter;

[0103] The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line;

[0104] The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

[0105] It is worth noting that the execution process of the specific steps in the device embodiment has been described in the method embodiment, and will not be repeated in the device embodiment. Please refer to the method embodiment.

[0106] Based on a general inventive concept, an embodiment of the present invention further provides a water pump control device for implementing the above method embodiment.

[0107] Figure 5 The schematic diagram of the structure of a water pump control device provided by an embodiment of the present invention is shown in FIG. Figure 5As shown, the water pump control device of this embodiment includes a processor 31 and a memory 32, and the processor 31 is connected to the memory 32. The processor 31 is used to call and execute the program stored in the memory 32; the memory 32 is used to store the program, and the program is at least used to execute the water pump control method in the above embodiment.

[0108] The specific implementation scheme of the water pump control device provided in the embodiment of the present application can refer to the implementation scheme of the water pump control method in any of the above embodiments, which will not be repeated here.

[0109] Based on a general inventive concept, an embodiment of the present invention further provides a water pump, comprising a water pump motor and the water pump control device described above; the water pump control device is connected to the water pump motor.

[0110] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0111] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0112] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0113] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0114] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0115] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0116] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0118] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A water pump control method, characterized in that: include: Acquire control parameters of a target water pump, wherein the control parameters include a maximum control parameter; Performing cubic calculation on the maximum control parameter to obtain a target maximum control parameter; Substituting the target maximum control parameter as the horizontal coordinate into the pre-constructed first straight line to obtain the maximum operating power; and substituting the maximum control parameter as the horizontal coordinate into the pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate; The operation of the target water pump is controlled with the maximum operating power and the maximum operating speed as approximate conditions.

2. The method according to claim 1, characterized in that Also includes: Obtaining a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter; Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter; The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line; The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

3. The method according to claim 1, characterized in that The control parameters include VSP parameters.

4. The method according to claim 1, characterized in that The controlling the operation of the target water pump using the maximum operating power and the maximum operating speed as approximate conditions includes: The maximum operating power and the maximum operating speed are respectively updated to replace the current maximum operating power and the current maximum operating speed set in the target water pump, and the operation of the target water pump is controlled with the updated current maximum operating power and the current maximum operating speed.

5. A water pump control device, characterized in that: include: An acquisition module, used for acquiring control parameters of a target water pump, wherein the control parameters include a maximum control parameter; A calculation module, used for performing a cubic calculation on the maximum control parameter to obtain a target maximum control parameter; A substitution module is used to substitute the target maximum control parameter as the horizontal coordinate into a pre-constructed first straight line to obtain the maximum operating power; and substitute the maximum control parameter as the horizontal coordinate into a pre-constructed second straight line to obtain the maximum operating speed; wherein the first straight line is a straight line obtained according to sample training with the target control parameter as the horizontal coordinate and the operating power as the vertical coordinate; and the second straight line is a straight line obtained according to sample training with the control parameter as the horizontal coordinate and the operating speed as the vertical coordinate; The control module is used to control the operation of the target water pump by taking the maximum operating power and the maximum operating speed as approximate conditions.

6. The device according to claim 5, characterized in that Also includes: A construction module is used to obtain a sample maximum operating power, a sample minimum operating power, a sample control parameter, and a sample minimum speed and a sample maximum speed of the sample water pump at 0 flow, wherein the sample control parameter includes a sample maximum control parameter and a sample minimum control parameter; Performing cubic calculations on the sample maximum control parameter and the sample minimum control parameter respectively to obtain a sample target maximum control parameter and a sample target minimum control parameter; The sample target minimum control parameter is used as the horizontal coordinate, and the sample minimum operating power is used as the vertical coordinate to obtain the sample first point; the sample target maximum control parameter is used as the horizontal coordinate, and the sample maximum operating power is used as the vertical coordinate to obtain the sample second point; a straight line is fitted according to the sample first point and the sample second point to obtain a first straight line; The sample minimum control parameter is used as the horizontal coordinate, and the sample minimum operating speed is used as the vertical coordinate to obtain the third point of the sample; the sample maximum control parameter is used as the horizontal coordinate, and the sample maximum operating speed is used as the vertical coordinate to obtain the fourth point of the sample; a straight line is fitted according to the sample third point and the sample fourth point to obtain the second straight line.

7. A water pump control device, characterized in that: The invention comprises a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute the water pump control method according to any one of claims 1-4.

8. A water pump, characterized in that: It comprises a water pump motor and the water pump control device as claimed in claim 7; the water pump control device is connected to the water pump motor.

Images