CN117072423A - Circulating pump control method, device and equipment based on pressure and pressure difference - Google Patents
Circulating pump control method, device and equipment based on pressure and pressure difference Download PDFInfo
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application is suitable for the technical field of water pumps, and provides a circulating pump control method based on pressure and pressure difference, which obtains the performance parameters of a circulating pump in real time; determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump; respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump; and finally, dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump. The dynamic control of the circulating pump is realized without depending on a pressure sensor, and compared with the traditional dotting method, the method not only improves the control precision of the circulating pump, but also has greater practicability.
Description
Technical Field
The application belongs to the technical field of water pumps, and particularly relates to a circulating pump control method, device and equipment based on pressure and pressure difference.
Background
Circulation pumps are typically used in closed systems to circulate the liquid to maintain a constant temperature or pressure. For example, a circulation pump maintains the circulation of liquid by drawing the liquid into a heating system, cooling system, air conditioning system, or water supply system, and pushing the liquid back to the source while maintaining the temperature or pressure in each system stable to ensure uniform distribution of the liquid.
Currently, in systems using circulation pumps, in order to ensure temperature or pressure stability in the systems, dotting is often used to perform pressure balance analysis on nodes in each system, and the transfer relationship among flow, pressure and energy is determined by determining the optical system between the nodes. Although the dotting method is helpful for the performance and fault elimination of the circulating pump system in the analysis of the circulating pump system, the dotting method has certain limitation because the dotting method is based on the analysis of the whole system by the selected nodes under the steady-state condition, and ignores the transient response of the system and the defect of the number of nodes in the complex system. In particular, for some systems where acceleration, deceleration and inertia of the liquid are considerations, it is not possible to meet the accuracy requirements of the system.
Disclosure of Invention
The embodiment of the application provides a circulating pump control method, a circulating pump control device and circulating pump control equipment based on pressure and pressure difference, which can solve the problems.
In a first aspect, an embodiment of the present application provides a method for controlling a circulation pump based on pressure and pressure difference, including: acquiring performance parameters of the circulating pump in real time; determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump; respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump; and dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump.
In one embodiment, the performance parameters of the circulation pump include: current, rotational speed and input power; a first performance curve of a circulation pump comprising: a first curve between current and flow, a second curve between rotational speed and flow, and a third curve between input power and flow; determining a current flow of the circulation pump according to the performance parameter and the performance curve of the circulation pump, including: fitting the current with each current in the first curve to obtain a first flow at a position corresponding to a first fitting difference, wherein the first fitting difference is the minimum value of the difference between the current and each current in the first curve; fitting the rotating speeds with the rotating speeds in the second curve to obtain a second flow at a position corresponding to a second fitting difference, wherein the second fitting difference is the minimum value of the difference between the rotating speeds and the rotating speeds in the second curve; fitting the input power with each input power in a third curve to obtain a third flow at a position corresponding to a third fitting difference, wherein the third fitting difference is the minimum value of the difference between the input power and each input power in the third curve; and comparing the first fitting difference, the second fitting difference and the third fitting difference, and taking the flow at the position corresponding to the minimum fitting difference as the current flow of the circulating pump.
In one embodiment, the second performance curve of the circulation pump is a pressure curve, and the third performance curve of the circulation pump is a proportional pressure differential curve; determining a current pressure and a proportional pressure difference of the circulating pump according to the current flow of the circulating pump, a second performance curve of the circulating pump and a third performance curve of the circulating pump, respectively, including: traversing a pressure curve according to the current flow of the circulating pump to obtain the current pressure of the circulating pump; traversing a proportional pressure difference curve according to the current flow of the circulating pump to obtain the current proportional pressure difference of the circulating pump.
In one embodiment, dynamically adjusting the operating state of the circulation pump according to the current pressure and the proportional pressure difference of the circulation pump comprises: and judging deviation values of the pressure from a preset first pressure threshold value and a preset second pressure threshold value respectively, and if the deviation value of the pressure from the first pressure threshold value or from the second pressure threshold value is larger than or equal to the preset deviation threshold value, generating a control signal according to the deviation value, wherein the control signal is used for adjusting the flow of the circulating pump, and simultaneously dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference.
In one embodiment, the proportional pressure differential is used to characterize the energy conversion efficiency of the circulation pump at the corresponding flow rate; the method for dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference comprises the following steps: and determining and adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference, and dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the amplitude.
In one embodiment, generating the control signal based on the offset value includes: and determining the amplitude of the flow of the regulating circulating pump according to the deviation value, and generating a control signal according to the amplitude of the flow of the regulating circulating pump.
In one embodiment, before determining the current flow rate of the circulation pump according to the performance parameter and the first performance curve of the circulation pump, the method further comprises: and processing the performance parameters based on preset rules to obtain standard performance parameters.
In a second aspect, an embodiment of the present application provides a circulation pump control device based on pressure and pressure difference, including:
the acquisition module is used for acquiring the performance parameters of the circulating pump in real time;
the first determining module is used for determining the current flow of the circulating pump according to the performance parameters and a first performance curve of the circulating pump;
the second determining module is used for respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump;
and the adjusting module is used for dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump.
In a third aspect, an embodiment of the present application provides an apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing a method as described in the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed by a processor, implements a method as described in the first aspect above.
According to the circulating pump control method based on pressure and pressure difference, performance parameters of the circulating pump are obtained in real time; determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump; respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump; and finally, dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump. The dynamic control of the circulating pump is realized without depending on a pressure sensor, and compared with the traditional dotting method, the method not only improves the control precision of the circulating pump, but also has greater practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for controlling a circulation pump based on pressure and differential pressure provided by an embodiment of the present application;
FIG. 2 is a schematic flow chart of S102 in a method for controlling a circulating pump based on pressure and differential pressure according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a control device for a circulation pump based on pressure and pressure difference according to an embodiment of the present application;
fig. 4 is a schematic diagram of a circulating pump control apparatus based on pressure and pressure difference according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Referring to fig. 1, fig. 1 is a schematic flow chart of a control method of a circulation pump based on pressure and pressure difference according to an embodiment of the application. An execution body of a circulating pump control method based on pressure and pressure difference in this embodiment is a control module in a circulating pump system or an apparatus for controlling a circulating pump system, which may be a personal computer, a server, or the like. The method of controlling the circulation pump based on the pressure and the pressure difference as shown in fig. 1 may include:
s101: and acquiring the performance parameters of the circulating pump in real time.
The performance parameters of the circulation pump include: current, rotational speed, and input power. The current can be measured by a current sensor, the rotating speed can be estimated by counter electromotive force, and the input power can be calculated by the product of the current and the voltage. The performance parameters of the circulating pump are obtained in real time, and the circulating pump is controlled to operate in the whole area according to the actual working condition demands, so that the circulating pump is not limited to a few preset points. In contrast, dotting can only be operated on a few points input in advance, and cannot flexibly adapt to different working condition requirements.
It should be noted that, during the process of collecting the performance parameters, errors or noise may occur in the collected performance parameters due to sensor errors and signal interference. Therefore, the collected performance parameters can be processed based on preset rules to obtain more accurate performance parameters.
Specifically, after the performance parameter of the circulation pump is obtained in real time, before determining the current flow rate of the circulation pump according to the performance parameter and the first performance curve of the circulation pump, the method may include: and processing the performance parameters based on preset rules to obtain standard performance parameters.
Processing the performance parameters based on preset rules, including: performing calibration and filtering processing on the acquired performance parameters to eliminate sensor errors and signal interference and obtain accurate and stable parameter data; and carrying out unit conversion on the parameter data after the calibration and filtering processing to obtain standard performance parameters. And the method is convenient for subsequent calculation and comparison, and in addition, the parameters can be sampled and stored so as to facilitate historical data analysis and performance evaluation of the circulating pump system.
S102: and determining the current flow of the circulating pump according to the performance parameters of the circulating pump and the first performance curve of the circulating pump.
A first performance curve of a circulation pump comprising: a first curve between current and flow, a second curve between rotational speed and flow, and a third curve between input power and flow. Specifically, a first curve between current and flow is used to characterize the relationship between current and flow of the circulation pump, a second curve between rotational speed and flow is used to characterize the relationship between rotational speed and flow of the circulation pump, and a third curve between input power and flow is used to characterize the relationship between input power and flow. The first curve, the second curve and the third curve are preset curves capable of ensuring the circulating pump to run in an optimal state according to working condition requirements.
After the performance parameters of the circulating pump are obtained, the embodiment of the application further combines the performance parameters of the circulating pump with the first performance curve of the circulating pump so as to accurately analyze the current flow of the circulating pump.
In one embodiment, as shown in fig. 2, S102 includes S1021 to S1025. The details are as follows:
s1021: fitting the current with each current in the first curve to obtain a first flow at a position corresponding to a first fitting difference, wherein the first fitting difference is the minimum value of the difference between the current and each current in the first curve.
And determining the flow corresponding to the current with the smallest difference value with the current in the first curve as the first flow by comparing the current with the currents in the first curve respectively. To determine the flow rate that best matches the current of the circulation pump.
S1022: and fitting the rotating speed with each rotating speed in the second curve to obtain a second flow at a position corresponding to a second fitting difference, wherein the second fitting difference is the minimum value of the difference between the rotating speed and each rotating speed in the second curve.
And determining the flow corresponding to the rotating speed with the smallest difference value with the current rotating speed in the second curve as a second flow by comparing the current rotating speed with each rotating speed in the second curve. To determine the flow rate that best matches the rotational speed of the circulation pump.
S1023: fitting the input power with each input power in a third curve to obtain a third flow at a position corresponding to a third fitting difference, wherein the third fitting difference is the minimum value of the difference between the input power and each input power in the third curve.
And determining the flow corresponding to the input power with the smallest difference value with the current input power in the third curve as the third flow by comparing the current input power with the input powers in the third curve respectively. To determine the flow rate that best matches the input power to the circulation pump.
S1024: and comparing the first fitting difference, the second fitting difference and the third fitting difference, and taking the flow at the position corresponding to the minimum fitting difference as the current flow of the circulating pump.
After the first flow, the second flow and the third flow are obtained, the first fitting difference, the second fitting difference and the third fitting difference are compared for further improving the judgment of the flow required by the circulating pump in the optimal working state, so that the error of the flow is minimum, and the accurate control of the circulating pump is improved.
S103: and respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump.
The second performance curve of the circulating pump is a pressure curve, and the third performance curve of the circulating pump is a proportional pressure difference curve; determining a current pressure and a proportional pressure difference of the circulating pump according to the current flow of the circulating pump, a second performance curve of the circulating pump and a third performance curve of the circulating pump, respectively, including: traversing a pressure curve according to the current flow of the circulating pump to obtain the current pressure of the circulating pump; traversing a proportional pressure difference curve according to the current flow of the circulating pump to obtain the current proportional pressure difference of the circulating pump.
Traversing a pressure curve according to the current flow of the circulating pump, and matching the current flow with the pressure curve to obtain the pressure matched with the current flow as the current pressure of the circulating pump; traversing a proportional pressure difference curve according to the current flow of the circulating pump, and matching the current flow with the proportional pressure difference curve to obtain a proportional pressure difference matched with the current flow as the current proportional pressure difference of the circulating pump.
The pressure curve and the proportional pressure curve of the circulating pump are combined, so that the constant pressure control and the pressure difference control of the circulating pump are simultaneously carried out, and the working state of the circulating pump is dynamically adjusted, so that the effects of water supply as required, energy conservation and emission reduction are realized. Specifically, the pressure curve and the proportional pressure difference curve of the circulating pump are freely customized according to the working requirement of the circulating pump, and can be specifically adjusted according to the working state of the circulating pump, so that the optimized working requirement of the circulating pump can be met.
S104: and dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump.
According to the current pressure and the proportional pressure difference of the circulating pump, dynamically adjusting the working state of the circulating pump, comprising: and judging deviation values of the pressure from a preset first pressure threshold value and a preset second pressure threshold value respectively, and if the deviation value of the pressure from the first pressure threshold value or from the second pressure threshold value is larger than or equal to the preset deviation threshold value, generating a control signal according to the deviation value, wherein the control signal is used for adjusting the flow of the circulating pump, and dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of a valve according to the proportional pressure difference. Under the condition that any pressure sensor is not needed, the mode of simultaneously adjusting the pressure and the proportion pressure difference is adopted, so that the on-demand water supply of the circulating pump is ensured, the water supply efficiency of the circulating pump is improved, and the application cost is reduced.
Wherein generating a control signal based on the offset value comprises: and determining the amplitude of the flow of the regulating circulating pump according to the deviation value, and generating a control signal according to the amplitude of the flow of the regulating circulating pump.
The proportional pressure difference is used for representing the energy conversion efficiency of the circulating pump under the corresponding flow; the method for dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference comprises the following steps: and determining and adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference, and dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the amplitude.
The water supply flow is controlled according to the heat load demand of the system by changing the rotating speed of the circulating pump or the opening degree of the valve, so that the circulating pump system can realize accurate water supply flow adjustment to meet the demands under different load conditions. At the same time, the circulation pump system also monitors the pressure of the water supply system. If the pressure is too high, indicating that the system has lower resistance, the pump flow may be reduced to reduce energy consumption. Conversely, if the pressure is too low, indicating that the resistance of the system is high, the pump flow may be increased to maintain the desired water supply pressure. The adoption of the proportional pressure difference and the pressure control mode can help the circulating pump system to achieve higher energy efficiency. When the load is low, the circulation pump system can reduce the flow rate of the pump, thereby reducing the energy consumption. At high loads, the circulation pump system automatically increases the pump flow to ensure adequate water supply. The control mode can realize very accurate control of the water supply of the circulating pump, and avoid excessive or insufficient water supply, thereby improving the performance and stability of the circulating pump system. By dynamically adjusting the operation parameters of the circulating pump, the noise and vibration of the circulating pump under the condition of low load can be reduced, and the comfort and reliability of the circulating pump system are improved. In summary, the control of the water supply to the circulation pump by means of simultaneous adjustment of the proportional pressure differential and the pressure can achieve more efficient energy utilization, more stable system performance and longer equipment life, thereby providing significant advantages for building and industrial applications.
In summary, according to the circulating pump control method based on pressure and pressure difference provided by the embodiment of the application, the performance parameters of the circulating pump are obtained in real time; determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump; respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump; and finally, dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump. The dynamic control of the circulating pump is realized without depending on a pressure sensor, and compared with the traditional dotting method, the method not only improves the control precision of the circulating pump, but also has greater practicability.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
Referring to fig. 3, fig. 3 is a schematic diagram of a circulating pump control device based on pressure and pressure difference according to an embodiment of the application. The modules included are for performing the steps in the corresponding embodiment of fig. 1. Refer specifically to the description of the corresponding embodiment in fig. 1. For convenience of explanation, only the portions related to the present embodiment are shown. Referring to fig. 3, the circulation pump control device 3 based on pressure and differential pressure includes:
an acquisition module 31, configured to acquire a performance parameter of the circulation pump in real time;
a first determining module 32, configured to determine a current flow rate of the circulation pump according to the performance parameter and a first performance curve of the circulation pump;
a second determining module 33, configured to determine a current pressure and a proportional pressure difference of the circulation pump according to the current flow rate of the circulation pump, the second performance curve of the circulation pump, and the third performance curve of the circulation pump, respectively;
the adjusting module 34 is configured to dynamically adjust an operating state of the circulation pump according to a current pressure and a proportional pressure difference of the circulation pump.
Further, the performance parameters of the circulation pump include: current, rotational speed and input power; a first performance curve of a circulation pump comprising: a first curve between current and flow, a second curve between rotational speed and flow, and a third curve between input power and flow;
the first determination module 32 includes:
the first fitting unit is used for fitting the current with each current in the first curve to obtain a first flow at a position corresponding to a first fitting difference, wherein the first fitting difference is the minimum value of the difference between the current and each current in the first curve;
the second fitting unit is used for fitting the rotating speed with each rotating speed in the second curve to obtain a second flow at a position corresponding to a second fitting difference, wherein the second fitting difference is the minimum value of the difference between the rotating speed and each rotating speed in the second curve;
the third fitting unit is used for fitting the input power with each input power in a third curve to obtain a third flow at a position corresponding to a third fitting difference, wherein the third fitting difference is the minimum value of the difference between the input power and each input power in the third curve;
and the comparison unit is used for comparing the first fitting difference, the second fitting difference and the third fitting difference, and taking the flow at the position corresponding to the minimum fitting difference as the current flow of the circulating pump.
Further, the second performance curve of the circulating pump is a pressure curve, and the third performance curve of the circulating pump is a proportional pressure difference curve;
the second determining module 33 includes:
the first traversing unit is used for traversing the pressure curve according to the current flow of the circulating pump to obtain the current pressure of the circulating pump;
the second traversing unit is used for traversing the proportional pressure difference curve according to the current flow of the circulating pump to obtain the current proportional pressure difference of the circulating pump.
Further, the adjusting module 34 is specifically configured to:
and judging deviation values of the pressure from a preset first pressure threshold value and a preset second pressure threshold value respectively, and if the deviation value of the pressure from the first pressure threshold value or from the second pressure threshold value is larger than or equal to the preset deviation threshold value, generating a control signal according to the deviation value, wherein the control signal is used for adjusting the flow of the circulating pump, and simultaneously dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference.
Further, the proportional pressure difference is used for representing the energy conversion efficiency of the circulating pump under the corresponding flow; the method for dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference comprises the following steps: and determining and adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference, and dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the amplitude.
Further, generating a control signal according to the deviation value includes: and determining the amplitude of the flow of the regulating circulating pump according to the deviation value, and generating a control signal according to the amplitude of the flow of the regulating circulating pump.
Further, the circulation pump control device 3 based on the pressure and the pressure difference further includes:
and the processing module is used for processing the performance parameters based on preset rules to obtain standard performance parameters.
It should be understood that the specific implementation process of each module may refer to each step in the method embodiment, which is not described herein.
Referring to fig. 4, fig. 4 is a schematic diagram of a circulation pump control apparatus based on pressure and pressure difference according to an embodiment of the present application. As shown in fig. 4, the circulation pump control apparatus 4 based on pressure and differential pressure includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40, such as a circulation pump control program based on pressure and pressure differences. The steps of the various embodiments of the method for controlling a circulation pump based on pressure and differential pressure described above, such as steps S101 to S104 shown in fig. 1, are implemented when the processor 40 executes the computer program 42. Alternatively, the processor 40 may perform the functions of the modules/units in the above-described apparatus embodiments when executing the computer program 42, such as the functions of the acquisition module 31 to the adjustment module 34 shown in fig. 3.
By way of example, the computer program 42 may be partitioned into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 42 in the pressure and pressure differential based circulation pump control device 4. For example, the computer program 42 may be divided into an acquisition module, a first determination module, a second determination module, and an adjustment module, each of which specifically functions as follows:
the acquisition module is used for acquiring the performance parameters of the circulating pump in real time;
the first determining module is used for determining the current flow of the circulating pump according to the performance parameters and a first performance curve of the circulating pump;
the second determining module is used for respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump;
and the adjusting module is used for dynamically adjusting the working state of the circulating pump according to the current pressure and the proportional pressure difference of the circulating pump.
The circulation pump control device based on pressure and pressure difference may include, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 4 is merely an example of a pressure and pressure differential based circulation pump control device 4 and is not intended to be limiting of the pressure and pressure differential based circulation pump control device 4, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the pressure and pressure differential based circulation pump control device 4 may also include input and output devices, network access devices, buses, etc.
The processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the circulation pump control device 4 based on the pressure and the pressure difference, for example, a hard disk or a memory of the circulation pump control device 4 based on the pressure and the pressure difference. The memory 41 may also be an external storage device of the circulation pump control device 4 based on pressure and pressure difference, such as a plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card) or the like provided on the circulation pump control device 4 based on pressure and pressure difference. Further, the circulation pump control device 4 based on the pressure and the pressure difference may also include both an internal memory unit and an external memory device of the circulation pump control device 4 based on the pressure and the pressure difference. The memory 41 is used to store the computer program and other programs and data required for the control device of the circulation pump based on pressure and pressure difference. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It should be noted that, because the content of information interaction and execution process between the above devices/units is based on the same concept as the method embodiment of the present application, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein.
The embodiment of the application also provides a network device, which comprises: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps in any of the various method embodiments described above when the computer program is executed by the processor.
Embodiments of the present application also provide a computer readable storage medium storing a computer program which, when executed by a processor, implements steps for implementing the various method embodiments described above.
Embodiments of the present application provide a computer program product which, when run on a mobile terminal, causes the mobile terminal to perform steps that enable the implementation of the method embodiments described above.
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 present application may implement all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or 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 may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on 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.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A method of controlling a circulation pump based on pressure and differential pressure, comprising:
acquiring performance parameters of the circulating pump in real time;
determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump;
determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump;
and dynamically adjusting the working state of the circulating pump according to the current pressure of the circulating pump and the proportional pressure difference.
2. The method for controlling a circulation pump based on pressure and differential pressure according to claim 1, wherein the performance parameters of the circulation pump include: current, rotational speed and input power; a first performance curve of the circulation pump, comprising: a first curve between current and flow, a second curve between rotational speed and flow, and a third curve between input power and flow;
the determining the current flow of the circulating pump according to the performance parameter and the performance curve of the circulating pump comprises the following steps:
fitting the current with each current in the first curve to obtain a first flow at a position corresponding to a first fitting difference, wherein the first fitting difference is the minimum value of the difference between the current and each current in the first curve;
fitting the rotating speed with each rotating speed in the second curve to obtain a second flow at a position corresponding to a second fitting difference, wherein the second fitting difference is the minimum value of the difference between the rotating speed and each rotating speed in the second curve;
fitting the input power with each input power in the third curve to obtain a third flow at a position corresponding to a third fitting difference, wherein the third fitting difference is the minimum value of the difference between the input power and each input power in the third curve;
and comparing the first fitting difference, the second fitting difference and the third fitting difference, and taking the flow at the position corresponding to the minimum fitting difference as the current flow of the circulating pump.
3. The method for controlling a circulation pump based on pressure and differential pressure according to claim 2, wherein the second performance curve of the circulation pump is a pressure curve, and the third performance curve of the circulation pump is a proportional differential pressure curve;
the determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump respectively comprises the following steps:
traversing the pressure curve according to the current flow of the circulating pump to obtain the current pressure of the circulating pump;
and traversing the proportional pressure difference curve according to the current flow of the circulating pump to obtain the current proportional pressure difference of the circulating pump.
4. The method for controlling a circulation pump based on pressure and pressure difference according to claim 1, wherein dynamically adjusting the operation state of the circulation pump according to the current pressure and the proportional pressure difference of the circulation pump comprises:
and judging deviation values of the pressure from a preset first pressure threshold value and a preset second pressure threshold value respectively, and if the deviation value of the pressure from the first pressure threshold value or from the second pressure threshold value is larger than or equal to the preset deviation threshold value, generating a control signal according to the deviation value, wherein the control signal is used for adjusting the flow of the circulating pump, and simultaneously dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of a valve according to the proportional pressure difference.
5. The method for controlling a circulation pump based on pressure and differential pressure according to claim 4, wherein the proportional differential pressure is used to characterize the energy conversion efficiency of the circulation pump at a corresponding flow rate;
the dynamic adjustment of the rotation speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference comprises the following steps:
and determining and adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the proportional pressure difference, and dynamically adjusting the rotating speed of the circulating pump or the opening and closing degree of the valve according to the amplitude.
6. The method of controlling a circulation pump based on pressure and differential pressure according to claim 4, wherein the generating a control signal according to the deviation value comprises:
and determining and adjusting the amplitude of the circulating pump flow according to the deviation value, and generating the control signal according to the amplitude of the circulating pump flow.
7. The method of controlling a circulation pump based on pressure and differential pressure according to any one of claims 1-6, further comprising, prior to determining the current flow rate of the circulation pump based on the performance parameter and the first performance curve of the circulation pump:
and processing the performance parameters based on preset rules to obtain standard performance parameters.
8. A circulation pump control device based on pressure and pressure difference, characterized by comprising:
the acquisition module is used for acquiring the performance parameters of the circulating pump in real time;
the first determining module is used for determining the current flow of the circulating pump according to the performance parameter and a first performance curve of the circulating pump;
the second determining module is used for respectively determining the current pressure and the proportional pressure difference of the circulating pump according to the current flow of the circulating pump, the second performance curve of the circulating pump and the third performance curve of the circulating pump;
and the adjusting module is used for dynamically adjusting the working state of the circulating pump according to the current pressure of the circulating pump and the proportional pressure difference.
9. An apparatus, the apparatus comprising: processor, memory and computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor realizes the steps of the method according to claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311237172.6A CN117072423A (en) | 2023-09-21 | 2023-09-21 | Circulating pump control method, device and equipment based on pressure and pressure difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311237172.6A CN117072423A (en) | 2023-09-21 | 2023-09-21 | Circulating pump control method, device and equipment based on pressure and pressure difference |
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| Publication Number | Publication Date |
|---|---|
| CN117072423A true CN117072423A (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311237172.6A Pending CN117072423A (en) | 2023-09-21 | 2023-09-21 | Circulating pump control method, device and equipment based on pressure and pressure difference |
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| Country | Link |
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| CN (1) | CN117072423A (en) |
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2023
- 2023-09-21 CN CN202311237172.6A patent/CN117072423A/en active Pending
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