CN114281119B - Water pressure control method, secondary water supply system, electronic device, and storage medium - Google Patents
Water pressure control method, secondary water supply system, electronic device, and storage medium Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000009123 feedback regulation Effects 0.000 claims abstract description 8
- 238000004590 computer program Methods 0.000 claims description 11
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The application provides a water pressure control method and a secondary water supply system, wherein the water pressure control method is used for the secondary water supply system, the secondary water supply system at least comprises a water pump and a frequency converter for controlling the water pump, and the water pressure control method comprises the following steps: acquiring initial working frequency of the frequency converter when the water outlet pressure is set pressure; controlling the frequency converter based on the initial acting frequency to enable the frequency converter to work for a specified time; and after the frequency converter works for a set time, performing feedback control on the frequency converter at the frequency after feedback regulation. According to the water pressure control method and the secondary water supply system, the waveform with larger oscillation in the early stage in the waveform of the water outlet pressure formed by the traditional feedback control can be skipped, and the starting point of the waveform is directly taken as one point with smaller fluctuation amplitude, so that the impact of the overlarge fluctuation of the water pressure on the outer pipe and the influence on a user electric appliance can be greatly inhibited, the water outlet constant pressure is kept in the secondary water supply, and the pressure fluctuation is reduced.
Description
Technical Field
The present invention relates to the field of secondary water supply, and more particularly, to a water pressure control method, a secondary water supply system, an electronic device, and a computer-readable storage medium for stabilizing the outlet water pressure of secondary water supply.
Background
In the case of a high-rise building, if water supply is performed only depending on the water supply pressure of a water plant, the water supply pressure is excessively high during the valley period of water use and excessively low during the peak period of water use. Therefore, the secondary water supply is often performed by a water pump.
In secondary water supply, the stability of the water outlet pressure is kept, and the reduction of pressure fluctuation is a very important thing, which is related to the safety of a pipe network and the safety of electrical appliances of residents. In general, the outlet pressure is affected by the water consumption and disturbed by the fluctuation of the inlet pressure, so that the rotating speed of the water pump is required to be controlled to enable the outlet pressure curve to become flat, and the stable outlet pressure can be kept no matter in the peak period or the valley period of the water consumption.
The field environment of secondary water supply is relatively complicated, and generally, different parameters and algorithms need to be set according to different conditions once and for all without using one scheme, so that the aim of precise control is fulfilled. In the traditional water pressure control method, the fluctuation of the water pressure is overlarge when the control is started, so that the smooth pressure curve of the outlet water pressure is not favorably kept.
Disclosure of Invention
The application aims to provide a water pressure control method and a secondary water supply system, which can reduce the fluctuation range of the outlet water pressure and keep the outlet water pressure stable all the time.
The purpose of the application is realized by adopting the following technical scheme:
in a first aspect, the present application provides a water pressure control method for a secondary water supply system including at least a water pump and a frequency converter for controlling the water pump, the water pressure control method including the steps of:
acquiring the initial working frequency of the frequency converter when the water outlet pressure is set pressure;
controlling the frequency converter based on the initial work frequency to enable the frequency converter to work for a set time; and
and after the frequency converter works for a set time, performing feedback control on the frequency converter at the frequency after feedback adjustment.
The beneficial effect of this technical scheme lies in, can skip the bigger wave form of the shock of earlier stage in the wave form of the play water pressure that traditional feedback control formed, directly regard as the starting point of control waveform from a little point of fluctuation range to can to a great extent restrain the impact of hydraulic too big fluctuation to the outer tube and to the influence of user's electrical apparatus, thereby in the secondary water supply, keep out water constant voltage, reduce the pressure oscillation.
In the above-described water pressure control method, in the step of controlling the inverter based on the initial working frequency, the inverter may be operated at a fixed frequency lower than the initial working frequency for the prescribed time.
The beneficial effect of this technical scheme lies in, can make the play water pressure when beginning to supply water rise to the numerical value close with the settlement pressure steadily.
In the above-described water pressure control method, in the step of controlling the inverter based on the initial working frequency, the inverter is operated at a fixed frequency lower by 2Hz than the initial working frequency for the prescribed time.
The beneficial effect of this technical scheme lies in, can ensure that the play water pressure can not acutely fluctuate when just beginning to supply water, can ensure simultaneously and can supply water fast.
In the above-described water pressure control method, in the step of controlling the frequency converter based on the initial work frequency, the duration of the prescribed time is adjusted so that the fluctuation value of the discharge water pressure is less than 0.1Mpa after the feedback control of the frequency converter is started.
The technical scheme has the advantages that the duration of the specified time controlled on the basis of the initial acting frequency can be determined properly, and the effluent pressure can be ensured not to fluctuate greatly and violently.
In the above-described water pressure control method, in the step of controlling the inverter based on the initial working frequency, the inverter is operated for 5s.
The technical scheme has the beneficial effects that the feedback control can be carried out on the frequency converter as soon as possible, the state of controlling the frequency converter with the fixed frequency can not be stopped for a long time, and the situation that the water pressure is too small or too large in the water consumption peak and the water consumption valley is avoided.
In the above-mentioned water pressure control method, the frequency after the feedback adjustment is obtained by performing proportional operation, integral operation, and differential operation on a difference value between the effluent water pressure and a set pressure.
The beneficial effect of this technical scheme lies in, can carry out feedback control to water pressure to no matter be at the water peak or at the water valley, can both ensure stable water supply pressure.
In a second aspect, the present invention provides a secondary water supply system comprising: the water pump controls the water outlet pressure;
the frequency converter controls the rotating speed of the water pump;
the pressure sensor acquires the effluent pressure; and
a controller that acquires the effluent pressure obtained by the pressure sensor, controls the frequency converter based on the effluent pressure, and controls the water pump via the frequency converter to adjust the effluent pressure,
the controller obtains the initial working frequency of the frequency converter when the water outlet pressure is set pressure,
the controller enables the frequency converter to control the frequency converter based on the initial work-doing frequency, enables the frequency converter to work for a specified time,
and after the frequency converter works for a set time, the controller performs feedback control on the frequency converter by using the frequency after feedback adjustment.
The secondary water supply system may further include an external input device that can adjust a parameter of the controller.
This solution has the advantage that parameters of the controller, such as the proportionality coefficient Kp, the integration time Ti and the differentiation time Td, can be adjusted by means of an external input device, and for example, in the step of controlling the frequency converter based on the initial working frequency, the specific frequency of the frequency converter and the length of the predetermined time of the operation of the frequency converter can also be controlled.
In the above-described secondary water supply system, in the step of controlling the inverter based on the initial working frequency, the inverter may be operated at a fixed frequency lower than the initial working frequency for the prescribed time.
In the above-described secondary water supply system, in the step of controlling the inverter based on the initial working frequency, the inverter may be operated at a fixed frequency lower by 2Hz than the initial working frequency for the prescribed time.
In the above secondary water supply system, in the step of controlling the frequency converter based on the initial work frequency, a duration of the prescribed time may be adjusted so that a fluctuation value of the discharge water pressure is less than 0.1Mpa after the feedback control of the frequency converter is started.
In the above-described secondary water supply system, the inverter may be operated for 5 seconds in the step of controlling the inverter based on the initial working frequency.
In the secondary water supply system, the feedback-adjusted frequency may be obtained by performing proportional operation, integral operation, and differential operation on a difference between the effluent pressure and the set pressure.
In a third aspect, the present application provides an electronic device comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of any of the above methods when executing the computer program.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic flow chart of a hydraulic control method according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a secondary water supply system provided in an embodiment of the present application;
FIG. 3 is a diagram illustrating the effect of pressure fluctuation of outlet water achieved by a water pressure control method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a program product for implementing a water pressure control method according to an embodiment of the present application.
Detailed Description
The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 1, an embodiment of the present invention provides a water pressure control method for a secondary water supply system including at least a water pump 1 and an inverter 2 controlling the water pump 1, the water pressure control method including the steps of:
s1: acquiring the initial acting frequency of the frequency converter 2 when the water outlet pressure is set pressure;
s2: controlling the frequency converter 2 based on the initial working frequency, and enabling the frequency converter 2 to work for a set time; and the number of the first and second groups,
s3: after the frequency converter 2 operates for a predetermined time, the frequency converter 2 is feedback-controlled at the feedback-adjusted frequency.
As shown in fig. 2, another embodiment of the present invention provides a secondary water supply system, including: a water pump 1 for controlling the pressure of the discharged water; a frequency converter 2 which controls the rotation speed of the water pump 1; a pressure sensor 3 that acquires the effluent pressure; and a controller 4 that acquires the discharge water pressure obtained by the pressure sensor 3 and controls the inverter 2 based on the discharge water pressure, thereby controlling the water pump 1 via the inverter 2 to adjust the discharge water pressure.
The controller 4 obtains the initial working frequency of the frequency converter 2 when the effluent pressure is the set pressure, controls the frequency converter 2 based on the initial working frequency to enable the frequency converter 2 to work for a set time, and after the frequency converter 2 works for the set time, the controller 4 performs feedback control on the frequency converter 2 according to the frequency after feedback adjustment.
According to the water pressure control method and the secondary water supply system, the waveform with larger shock in the early stage in the waveform of the outlet water pressure formed by the traditional feedback control can be skipped, and one point with smaller fluctuation amplitude is directly used as the starting point of the control waveform, so that the impact of the overlarge fluctuation of the water pressure on the outer pipe and the influence on user electric appliances can be greatly inhibited, the outlet water constant pressure is maintained in the secondary water supply, and the pressure fluctuation is reduced.
The structure of the secondary water supply system and the above-described steps of the water pressure control method according to the present invention will be specifically described below.
Step S1: and acquiring the initial working frequency of the frequency converter 2 when the water outlet pressure is the set pressure.
In the embodiment of the present invention, the outlet water pressure of the secondary water supply is acquired by the pressure sensor 3. When the initial working frequency is obtained, the water outlet valve of the water supply pipeline is closed, then the frequency of the frequency converter 2 is adjusted, so that the water outlet pressure is adjusted, and when the water outlet pressure becomes the set pressure, the frequency of the frequency converter 2 at the moment is the initial working frequency. Here, the set pressure means a desired discharge water pressure, for example, 1Mpa.
Step S2: the inverter 2 is controlled based on the start work frequency acquired in step S1, and the inverter 2 is operated for a predetermined time.
In the present invention, controlling the inverter 2 based on the initial working frequency does not mean operating the inverter 2 at the initial working frequency. In fact, in an embodiment of the present invention, controlling the frequency converter 2 based on the initial work frequency is embodied in that the frequency converter 2 is operated at a certain fixed frequency lower than the initial work frequency.
By operating the frequency converter 2 for a predetermined time at a fixed frequency lower than the initial working frequency, the outlet pressure can be changed more smoothly without being fluctuated sharply in the time period of starting water supply, and the outlet pressure curve can be smoothed.
In a specific embodiment, the inventor has conducted long-term studies and determined that in step S2, operating the frequency converter 2 at a fixed frequency 2Hz lower than the starting working frequency can ensure that the discharge water pressure does not fluctuate dramatically at the beginning of water supply, while ensuring rapid water supply.
Of course, in step S2, it is not limited that the frequency converter 2 is caused to operate at a fixed frequency 2Hz lower than the initial operating frequency, and according to the specific operating environment of the secondary water supply system, an appropriate frequency may be determined based on the initial operating frequency to control the frequency converter 2, and the frequency may be a fixed frequency other than a value 2Hz lower than the actual operating frequency, a fixed frequency higher than the initial operating frequency, or the frequency converter 2 may be controlled by the initial operating frequency itself. In the specific implementation, the frequency converter 2 is not necessarily controlled at a fixed frequency, and the frequency converter 2 may be controlled as a function of frequency that varies around the initial operating frequency.
In step S2, the inverter 2 is operated for a predetermined time at the frequency determined based on the initial work frequency. In the embodiment of the present invention, the prescribed time is determined such that the fluctuation value of the discharge water pressure after the start of the feedback control of the inverter 2 is less than 0.1Mpa.
When the predetermined time is too short, the frequency converter 2 is feedback-controlled too early, and the difference between the discharge water pressure and the set pressure is large, so that the frequency of the feedback regulation port (determined by the following formula u (t)) fluctuates and the fluctuation of the discharge water pressure after the feedback regulation is also too large, and therefore, the predetermined time needs to be designed so that the fluctuation value of the discharge water pressure is less than 0.1Mpa when the frequency converter 2 starts feedback-controlled at the feedback-regulated frequency after the frequency converter 2 is operated for the predetermined time. If the predetermined time is too long, the inverter 2 is controlled at a constant frequency for the predetermined time (no feedback control is performed), and therefore, the water supply pressure is too high in the water-using valley period and too low in the water-using peak period, which is not preferable.
In an embodiment of the invention, the predetermined time is, for example, 5s. That is, in step S2, the frequency converter 2 is operated for 5S at a frequency determined based on the starting work frequency (e.g., a fixed frequency 2Hz lower than the starting work frequency). According to the study of the present inventors over a long period of time, when the predetermined time is set to 5s, the fluctuation value of the discharge water pressure is less than 0.1Mpa at the time of starting the feedback regulation of the inverter 2 at the frequency after the feedback regulation, and the feedback control of the inverter 2 (water pump 1) can be performed as quickly as possible, thereby avoiding the discharge water pressure from being too low or too high at the time of the peak or the valley of the used water.
In step S3, after the inverter 2 is operated for a predetermined time, the feedback control is performed on the inverter 2 at the feedback-adjusted frequency.
First, a feedback-adjusted frequency and a feedback control in an embodiment of the present invention are described, in which the feedback control specifically obtains the feedback-adjusted frequency according to a difference between a set water pressure value and an actual water pressure value, and controls the frequency of the frequency converter 2 according to the feedback-adjusted frequency.
The feedback control includes three important parameters including a proportionality coefficient Kp, an integration time Ti, and a differentiation time Td. The frequency after feedback adjustment is obtained by performing proportional operation, integral operation and differential operation on the difference value of the effluent pressure and the set pressure.
The proportional operation, the integral operation, and the differential operation will be specifically described below.
The proportionality coefficient Kp is a factor for amplifying the difference e (t) between the preset value (set water pressure value) and the feedback value (actual water pressure value), and can be simply understood as a straight line passing through coordinates (0, 0), and the mathematical expression is y = Kp x, where x is the difference between the preset value and the feedback value, and the slope of the straight line is determined by Kp, and the larger Kp is, the overshoot is increased (oscillation becomes serious), and the response speed of the system is increased.
The formula of the proportional operation is as follows: u. of 1 (t)＝Kp*e(t)
The integration operation is to continuously integrate (accumulate) the deviation and to a certain extent, process the deviation once again, and the integration time Ti means how often the deviation is processed. The smaller the value of the integration time Ti, the faster the processing frequency, the larger the value, the longer the integration time, and the more pronounced the hysteresis. The integral is the integral of the error, namely the infinite sum of the error, as long as the deviation still exists, the deviation is continuously integrated (accumulated), and when the sum is accumulated to a certain value, the sum is processed once again, so that the oscillation phenomenon is avoided. Therefore, the integral operation has hysteresis, and the hysteresis effect is more obvious when the numerical value is larger.
The formula of the integral operation is:
the differential in the differential operation is the differential to the error, that is to say, the differential operation has the effect of giving a corresponding regulating action in advance according to the rate of the change of the difference value of the two times, the larger the numerical value is, the more obvious the effect of the advance is, and the buffer can be buffered to a certain extentAnd (5) oscillating. If the error 1 is e (1) and the error 2 is e (2), the differential of the error is de = e (2) -e (1), and then the differential coefficient d is multiplied, so that the formula of the differential operation is: u. u 3 (t)＝Td*de(t)/dt。
The feedback-adjusted frequency u (t) can be calculated by the following formula:
the above equation calculated u (t) represents the frequency of the frequency converter 2 after feedback adjustment (in the present embodiment in percentage form, the calculated u (t) is multiplied by the maximum frequency (e.g. 50 Hz) of the frequency converter 2, resulting in the driving frequency).
In the prior art, when the outlet water pressure is adjusted by feedback, for example, the frequency of the frequency converter 2 is controlled by the above equation u (t), and at this time, as shown in fig. 3, the outlet water pressure changes as shown by the curve in the figure.
As can be seen, the outlet pressure will approach the dotted set value (1 MPa in the figure) infinitely as time goes on until there is no fluctuation, so that the outlet pressure can be stabilized no matter whether the water consumption is a peak or a valley. However, it can be seen in the figure that the maximum value and the minimum value of the discharge water pressure are greatly different from the broken line (set water pressure value) at the time of starting water supply, i.e., in the first few waveforms from zero. In the figure, the water pressure is set to 1Mpa, but the maximum value of the discharge water pressure in the first waveform reaches 1.5Mpa, and the minimum value thereof reaches 0.7Mpa, and such fluctuation of the discharge water pressure causes great inconvenience to the user.
Unlike the conventional hydraulic pressure control method using only feedback control, in the hydraulic pressure control method of the present embodiment, the start operating frequency of the inverter 2 when the effluent pressure is the set pressure is acquired in step S1, then the inverter 2 is controlled based on the start operating frequency in step S2, the inverter 2 is operated for a predetermined time, and finally the frequency of the inverter 2 is feedback-controlled by the above equation u (t). Therefore, as shown by a straight line from a point A to a point B in fig. 3, the outlet water pressure is gradually increased to a degree close to the set pressure, and then feedback control is performed on the basis, so that the drastic change of the outlet water pressure when water supply is just started caused by directly using the feedback control is avoided. The point a is a starting point before manual control, and the point B is a starting point after manual control.
As shown in the figure, through the above steps S1 to S3, although the outlet water pressure still oscillates at the point B (when the feedback control is started), the pressure has been reduced to an acceptable range and is not sensed by the user. It should be noted that, although the curve from point a to point B in the figure is shown in the form of a straight line, the slope thereof can be adjusted by parameters, but this is ideally straight and will not be shown in practical situations.
As shown in fig. 2, the secondary water supply system according to the embodiment of the present invention further includes an external input device 5, and the external input device 5 is capable of adjusting parameters of the controller 4, for example, a proportionality coefficient Kp, an integration time Ti, and a differentiation time Td. The external input device 5 may control the specific frequency of the inverter 2 and the length of the predetermined time period for which the inverter 2 operates, for example, in the step of controlling the inverter 2 based on the start operating frequency.
According to the above description, the present invention provides a water pressure control method for a secondary water supply system including at least a water pump 1 and an inverter 2 controlling the water pump, the water pressure control method including the steps of: acquiring the initial acting frequency of the frequency converter 2 when the water outlet pressure is set pressure; controlling the frequency converter 2 based on the initial acting frequency to enable the frequency converter 2 to work for a specified time; and after the frequency converter 2 works for a set time, performing feedback control on the frequency converter 2 at the frequency after feedback regulation.
According to the above description, the present invention also provides a secondary water supply system comprising: a water pump 1 for controlling the pressure of the discharged water; a frequency converter 2 which controls the rotation speed of the water pump 1; a pressure sensor 3 that acquires the effluent pressure; and the controller 4 is used for acquiring the water outlet pressure obtained by the pressure sensor, controlling the frequency converter 2 based on the water outlet pressure, and controlling the water pump 1 through the frequency converter 2 to adjust the water outlet pressure, the controller 4 is used for acquiring the initial acting frequency of the frequency converter 2 when the water outlet pressure is set pressure, the controller 4 enables the frequency converter 2 to control the frequency converter 2 based on the initial acting frequency, the frequency converter 2 works for a set time, and the controller 4 feeds back the adjusted frequency to the frequency converter 2 after the frequency converter 2 works for the set time.
According to the water pressure control method and the secondary water supply system, the whole equipment can always operate in an effective work-doing area, the ineffective work of the water pump 1 at a low rotating speed when the equipment just starts to operate is eliminated, the power factor of the whole equipment is improved, and meanwhile, the energy-saving effect is achieved. In addition, through above scheme, water pressure stability becomes high, and the velocity of flow is even, has also eliminated rivers because the velocity of flow is different and the water hammer effect and the backward flow that cause strike, plays decisive effect to water pipe and user's electric protection, also can automize for whole equipment and operate and establish the basis.
The hydraulic pressure control method and the secondary water supply system according to the present invention will be described below with reference to a specific working example.
As shown in fig. 2, the secondary water supply system of the present invention includes a water pump 1, an inverter 2, a pressure sensor 3, a PLC as a controller 4, and a touch screen 3 as an external input device 5.
In the embodiment, the pressure sensor 3 acquires the effluent pressure through a current analog quantity of 4 mA-20 mA, and the actual effluent pressure is obtained through the engineering quantity conversion in the PLC through the measuring range of the pressure sensor 3. Then, the actual pressure is compared with the set pressure, and the driving frequency of the frequency converter 2 is obtained by using the u (t) so as to adjust the rotating speed of the water pump 1.
Firstly, the frequency of the frequency converter is obtained by the staff on site when the water pump 1 drives the outlet water pressure to the set pressure, and 2Hz is reduced on the basis of the frequency to be used as the initial working frequency of the frequency converter. When the water pump 1 is started, the initial operating frequency is used as the output frequency of the frequency converter, and the water pump is operated for a predetermined time (5 s in the present embodiment), and at this time, the effluent pressure is increased to a value close to the set pressure. After the discharge pressure rises to a value close to the set pressure, the frequency of the inverter 2 is switched to the feedback control (u (t)) as described above. Thus, the starting point of the waveform of the outlet water pressure is no longer zero, and even if the outlet water pressure oscillates, the oscillation is reduced to an acceptable range, and the oscillation cannot be sensed by an end user.
Through the embodiment, the waveforms with larger first oscillations in the effluent pressure curve formed by the feedback control of the traditional technology can be skipped through manual control, and one point which can be accepted by the fluctuation later can be directly used as the starting point of the control waveform, so that the defects in the traditional feedback control algorithm are avoided, and the impact of the overlarge fluctuation of the water pressure on the outer pipe and the influence on the user electric appliance can be greatly inhibited.
Referring to fig. 4, an electronic device 200 is further provided in the embodiments of the present application, where the electronic device 200 includes at least one memory 210, at least one processor 220, and a bus 230 connecting different platform systems.
The memory 210 may include readable media in the form of volatile memory, such as random access memory (pram) 211 and/or cache memory 212, and may further include Read Only Memory (ROM) 213.
The memory 210 further stores a computer program, and the computer program can be executed by the processor 220, so that the processor 220 executes the steps of the water pressure control method in the embodiment of the present application, and the specific implementation manner of the method is consistent with the implementation manner and the achieved technical effect described in the embodiment of the water pressure control method, and details of the method are not repeated.
Accordingly, the processor 220 may execute the computer programs described above, and may execute the utility 214.
The electronic device 200 may also communicate with one or more external devices 240, such as a keyboard, pointing device, bluetooth device, etc., and may also communicate with one or more devices capable of interacting with the electronic device 200, and/or with any devices (e.g., routers, modems, etc.) that enable the electronic device 200 to communicate with one or more other computing devices. Such communication may be through input-output interface 250. Also, the electronic device 200 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 260. The network adapter 260 may communicate with other modules of the electronic device 200 via the bus 230. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 200, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.
The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium is used for storing a computer program, and when the computer program is executed, the steps of the water pressure control method in the embodiment of the present application are implemented, and a specific implementation manner of the steps is consistent with the implementation manner and the achieved technical effect described in the embodiment of the water pressure control method, and some details are not repeated.
Fig. 5 shows a program product 300 for implementing the above-mentioned water pressure control method provided by the present embodiment, which can employ a portable compact disc read only memory (CD-ROM) and include program codes, and can be run on a terminal device, such as a personal computer. However, the program product 300 of the present invention is not so limited, and in this application, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. Program product 300 may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that can communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing. Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the C programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
While the present application is described in terms of various aspects, features, and advantages, it is to be understood that such aspects are merely illustrative of and not restrictive on the broad application, and that all changes and modifications that come within the spirit and scope of the appended claims are desired to be protected by the following claims.
Claims (9)
1. A water pressure control method for a secondary water supply system including at least a water pump and an inverter controlling the water pump, the water pressure control method comprising the steps of:
acquiring the initial working frequency of the frequency converter when the water outlet pressure is set pressure;
controlling the frequency converter based on the initial work-doing frequency to enable the frequency converter to work for a specified time; and
after the frequency converter works for a set time, performing feedback control on the frequency converter at the frequency after feedback regulation;
in the step of controlling the frequency converter based on the initial work frequency, the frequency converter operates at a fixed frequency lower than the initial work frequency for the prescribed time.
2. The water pressure control method as claimed in claim 1,
in the step of controlling the frequency converter based on the initial work frequency, the frequency converter operates at a fixed frequency 2Hz lower than the initial work frequency for the prescribed time.
3. The hydraulic pressure control method according to any one of claims 1 to 2,
in the step of controlling the frequency converter based on the initial work frequency, the duration of the specified time is adjusted so that the fluctuation value of the water outlet pressure is less than 0.1Mpa after the frequency converter is subjected to feedback control.
4. The water pressure control method according to claim 3,
in the step of controlling the frequency converter based on the starting work frequency, the frequency converter is operated for 5s.
5. The water pressure control method as claimed in claim 1,
and the frequency after feedback adjustment is obtained by performing proportional operation, integral operation and differential operation on the difference value of the effluent pressure and the set pressure.
6. A secondary water supply system, comprising:
the water pump controls the water outlet pressure;
the frequency converter controls the rotating speed of the water pump;
the pressure sensor acquires the effluent pressure; and
a controller that acquires the effluent pressure obtained by the pressure sensor, controls the frequency converter based on the effluent pressure, and controls the water pump via the frequency converter to adjust the effluent pressure,
the controller obtains the initial working frequency of the frequency converter when the water outlet pressure is set pressure,
the controller enables the frequency converter to control the frequency converter based on the initial work-doing frequency, enables the frequency converter to work for a specified time,
after the frequency converter works for a set time, the controller performs feedback control on the frequency converter by using the frequency after feedback regulation;
and in the process of controlling the frequency converter based on the initial working frequency, the frequency converter works for the specified time at a fixed frequency lower than the initial working frequency.
7. The secondary water supply system as claimed in claim 6, further comprising an external input device,
the external input device is capable of adjusting a parameter of the controller.
8. An electronic device, characterized in that the electronic device comprises a memory storing a computer program and a processor implementing the steps of the method according to any of claims 1-5 when the processor executes the computer program.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591841.0A CN114281119B (en) | 2021-12-23 | 2021-12-23 | Water pressure control method, secondary water supply system, electronic device, and storage medium |
| PCT/CN2022/128820 WO2023116206A1 (en) | 2021-12-23 | 2022-10-31 | Water-pressure control method, secondary water supply system, electronic device and storage medium |
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| CN202111591841.0A CN114281119B (en) | 2021-12-23 | 2021-12-23 | Water pressure control method, secondary water supply system, electronic device, and storage medium |
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| CN114281119B (en) * | 2021-12-23 | 2022-11-04 | 无锡汇田水务科技有限公司 | Water pressure control method, secondary water supply system, electronic device, and storage medium |
| CN117294214B (en) * | 2023-11-27 | 2024-02-02 | 河北众瑞电气科技有限公司 | Rotor variable-frequency speed regulation control method and device |
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| WO2023116206A1 (en) | 2023-06-29 |
| CN114281119A (en) | 2022-04-05 |
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