Vacuum pump control method and apparatus based on frequency converter, and device and storage medium

Abstract

A vacuum pump control method and apparatus based on a frequency converter, and a device and a storage medium. The vacuum pump control method comprises: acquiring a current operating parameter of a vacuum pump; on the basis of the current operating parameter, determining the current operating condition of the vacuum pump from among a plurality of preset operating conditions; determining a target association relationship for the current operating condition from among a plurality of preset association relationships, wherein each preset association relationship comprises a preset control parameter of a frequency converter for the vacuum pump, and an adjusted control parameter associated with the preset control parameter; acquiring a target control parameter of the frequency converter for the vacuum pump; and if a preset condition is met, using the target control parameter as a preset control parameter, determining from the target association relationship an adjusted control parameter associated with the target control parameter, and replacing the target control parameter with the adjusted control parameter associated with the target control parameter, such that the frequency converter drives the vacuum pump on the basis of a target control parameter obtained after replacement.

Description

Vacuum pump control method, device, equipment and storage medium based on frequency converter

[0001] The present disclosure claims priority to the Chinese patent application No. CN202411320797.3, filed on September 23, 2024, and entitled "Vacuum pump control method, device, equipment and storage medium based on frequency converter", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vacuum pumps, in particular to a vacuum pump control method, device, equipment and storage medium based on a frequency converter. BACKGROUND

[0003] A vacuum pump is a commonly used device in industrial production, used for pumping gas and creating a vacuum, and is widely used in metallurgy, chemical industry, food, electronic plating and other industries. The vacuum pump is generally controlled by a frequency converter. In the same process, the frequency converter usually drives the motor in the vacuum pump according to fixed control parameters, such as fixed torque, speed or frequency.

[0004] However, the load of the vacuum pump varies at different stages of the process, so this fixed control parameter makes the frequency converter less adaptable to different stages of the vacuum pump, resulting in reduced efficiency and stability of the vacuum pump. SUMMARY

[0005] Embodiments of the present application provide a vacuum pump control method, device, equipment and storage medium based on a frequency converter, aiming to improve the efficiency and stability of the vacuum pump.

[0006] In a first aspect, embodiments of the present application provide a vacuum pump control method based on a frequency converter, comprising:

[0007] obtaining a current operating parameter of a vacuum pump;

[0008] determining a current operating condition of the vacuum pump among a plurality of preset operating conditions based on the current operating parameter;

[0009] determining a target association relationship in the current operating condition among a plurality of preset association relationships, wherein each of the preset association relationships includes a preset control parameter of the frequency converter for the vacuum pump and an adjusted control parameter associated with the preset control parameter;

[0010] obtaining a target control parameter of the frequency converter for the vacuum pump;

[0011] determining whether a preset condition is met;

[0012] If the preset condition is met, the following steps are performed: the target control parameter is taken as one of the preset control parameters, and in the target correlation relationship, the adjustment control parameter associated with the target control parameter is determined, the adjustment control parameter associated with the target control parameter is replaced by the target control parameter, so that the frequency converter drives the vacuum pump according to the replaced target control parameter.

[0013] In an embodiment, the preset correlation relationship is generated by the following steps:

[0014] The historical control parameter of the frequency converter to the vacuum pump at a historical time is obtained, and an adjustment control parameter obtained by adjusting the historical control parameter is obtained.

[0015] Based on the historical control parameter and the adjustment control parameter, the preset correlation relationship is generated, wherein the historical control parameter is taken as one of the preset control parameters in the preset correlation relationship, and the adjustment control parameter associated with the historical control parameter is taken as the adjustment control parameter associated with the historical control parameter.

[0016] In an embodiment, the preset correlation relationship is generated based on the historical control parameter and the adjustment control parameter, comprising:

[0017] The historical running parameter of the vacuum pump at the historical time is obtained.

[0018] Based on the historical running parameter, the historical running condition of the vacuum pump at the historical time is determined from a plurality of preset running conditions.

[0019] Based on the historical control parameter and the adjustment control parameter, the preset correlation relationship under the historical running condition is generated.

[0020] In an embodiment, the preset correlation relationship under the historical running condition is generated based on the historical control parameter and the adjustment control parameter, comprising:

[0021] The historical control parameter is taken as the horizontal coordinate in a preset coordinate system, and the adjustment control parameter is taken as the vertical coordinate in the preset coordinate system, and a curve equation is fitted.

[0022] Based on the curve equation, the preset correlation relationship under the historical running condition is generated.

[0023] In an embodiment, after the preset correlation relationship under the historical running condition is generated based on the curve equation, the following steps are further included:

[0024] write the preset correlation relationship under the historical operation condition into the frequency converter based on a preset programming interface of the frequency converter, so as to use the frequency converter to perform the step of determining the target correlation relationship under the current operation condition from the plurality of preset correlation relationships.

[0025] In an embodiment, the determining whether the preset condition is met comprises:

[0026] obtaining a preset control parameter range set for the target correlation relationship;

[0027] if the target control parameter is within the preset control parameter range, determining that the preset condition is met;

[0028] if the target control parameter is not within the preset control parameter range, determining that the preset condition is not met.

[0029] In an embodiment, after the determining whether the preset condition is met, the method further comprises:

[0030] if the preset condition is not met, controlling the frequency converter to drive the vacuum pump according to the target control parameter.

[0031] In a second aspect, embodiments of the present application provide a vacuum pump control device based on a frequency converter, the vacuum pump control device based on the frequency converter comprises:

[0032] a first obtaining module, configured to obtain a current operation parameter of a vacuum pump;

[0033] a first determining module, configured to determine a current operation condition of the vacuum pump from a plurality of preset operation conditions based on the current operation parameter;

[0034] a second determining module, configured to determine a target correlation relationship under the current operation condition from a plurality of preset correlation relationships, wherein each of the preset correlation relationships comprises a preset control parameter of a frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter;

[0035] a second obtaining module, configured to obtain a target control parameter of the frequency converter to the vacuum pump;

[0036] a condition determining module, configured to determine whether a preset condition is met;

[0037] a third determining module, configured to, if the preset condition is met, perform the following steps: taking the target control parameter as one of the preset control parameters, determining an adjusted control parameter associated with the target control parameter in the target correlation relationship, replacing the target control parameter with the adjusted control parameter associated with the target control parameter, and controlling the frequency converter to drive the vacuum pump according to the replaced target control parameter.

[0038] In a third aspect, embodiments of the present application provide an electronic device, comprising a processor and a memory, the memory storing a computer program configured to be executed by the processor to implement the variable frequency drive based vacuum pump control method according to any one of the preceding aspects.

[0039] In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program configured to be executed by a processor to implement the variable frequency drive based vacuum pump control method according to any one of the preceding aspects.

[0040] In a fifth aspect, embodiments of the present application provide a computer program product comprising computer programs or instructions configured to be executed by a processor to implement the variable frequency drive based vacuum pump control method according to any one of the preceding aspects.

[0041] Advantages of embodiments of the present application:

[0042] In embodiments of the present application, based on the current operating parameters of the vacuum pump, the current operating condition of the vacuum pump is determined, the target correlation relationship under the current operating condition is determined from a plurality of preset correlation relationships, and if a preset condition is met, the target control parameter of the vacuum pump by the variable frequency drive is replaced using the target correlation relationship, so that the target control parameter can change with different operating conditions, thereby improving the adaptability of the variable frequency drive to different operating conditions of the vacuum pump, and the efficiency and stability of the vacuum pump can also be improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0044] FIG. 1 is an embodiment flowchart of a variable frequency drive based vacuum pump control method according to an embodiment of the present application;

[0045] FIG. 2 is an embodiment flowchart of a generation method of a preset correlation relationship in a variable frequency drive based vacuum pump control method according to an embodiment of the present application;

[0046] FIG. 3 is an embodiment flowchart of part of the steps of a variable frequency drive based vacuum pump control method according to an embodiment of the present application;

[0047] FIG. 4 is an embodiment flowchart of a variable frequency drive assembly step in a variable frequency drive based vacuum pump control method according to an embodiment of the present application;

[0048] FIG. 5 is a flow diagram of an embodiment of a method for controlling a vacuum pump based on a frequency converter according to an embodiment of the present application;

[0049] FIG. 6 is a flow diagram of another embodiment of a method for controlling a vacuum pump based on a frequency converter according to an embodiment of the present application;

[0050] FIG. 7 is a structural diagram of an embodiment of a device for controlling a vacuum pump based on a frequency converter according to an embodiment of the present application;

[0051] FIG. 8 is a structural diagram of an embodiment of an electronic device according to an embodiment of the present application. Embodiments of the present application

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, any other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application. In the description of the present application, the meaning of “multiple” is two or more than two, unless otherwise explicitly and specifically limited.

[0053] In order to improve the efficiency and stability of the vacuum pump, the embodiments of the present application provide a method, device, equipment and storage medium for controlling a vacuum pump based on a frequency converter. Based on the current operating parameters of the vacuum pump, the current operating condition of the vacuum pump is determined, the target correlation relationship under the current operating condition is determined from a plurality of preset correlation relationships, and if the preset condition is met, the target control parameter of the vacuum pump is replaced by the target correlation relationship of the frequency converter, so that the target control parameter can change with different operating conditions, thereby improving the adaptability of the frequency converter to different operating conditions of the vacuum pump, and improving the efficiency and stability of the vacuum pump. For specific solutions, please refer to the following specific description.

[0054] In a first aspect, the embodiments of the present application provide a method for controlling a vacuum pump based on a frequency converter. Specifically, referring to FIG. 1, FIG. 1 is a flow diagram of an embodiment of a method for controlling a vacuum pump based on a frequency converter. In FIG. 1, the method for controlling a vacuum pump based on a frequency converter can include:

[0055] 101, obtaining the current operating parameters of the vacuum pump.

[0056] In the embodiments of the present application, the vacuum pump is connected with a frequency converter, and the frequency converter is used to drive the operation of the vacuum pump. For example, the frequency converter can be used to adjust the current supplied to the motor in the vacuum pump, so as to change the torque, speed or frequency of the motor, so that the vacuum pump can meet the process requirements of the corresponding process. The control mode of the frequency converter to the vacuum pump can be, for example, PI (Proportion Integration Differentiation) control, VF (Volt Frequency) control, vector control, feedback compensation control, etc.

[0057] In some embodiments of the present application, the current operating parameters of the vacuum pump include at least one of the current, frequency, power, voltage of the motor in the vacuum pump, the temperature of the vacuum pump, the pumping speed of the vacuum pump, and the vacuum degree of the vacuum pump. The current operating parameters of the vacuum pump can be obtained by corresponding sensors.

[0058] 102. Based on the current operating parameters, the current operating condition of the vacuum pump is determined from a plurality of preset operating conditions.

[0059] In the embodiments of the present application, the vacuum pump has different preset operating conditions in different stages of the process. For example, the preset operating conditions can include the operating condition of cold start, the operating condition of vacuum pumping, the operating condition of pressure boosting, the operating condition of aeration, etc. For example, the operating condition of cold start generally occurs when the temperature of the vacuum pump is low at the beginning of the process. For example, the operating condition of vacuum pumping generally occurs when the vacuum degree of the vacuum pump is high during vacuum pumping.

[0060] It can be understood that the operating parameters of the vacuum pump are different in different operating conditions, and therefore the current operating condition of the vacuum pump can be determined from a plurality of preset operating conditions based on the current operating parameters. The specific determination rule for determining the current operating condition of the vacuum pump based on the current operating parameters can be set based on actual conditions, which is not limited herein.

[0061] 103. In a plurality of preset association relationships, a target association relationship in the current operating condition is determined, wherein each preset association relationship includes a preset control parameter of the frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter.

[0062] In the embodiments of the present application, since the actual load of the vacuum pump under different preset operating conditions is different, the preset correlation under each preset operating condition can be preset. Each preset correlation represents an association between the preset control parameter of the frequency converter for the vacuum pump and the adjusted control parameter, for example, each preset correlation includes a curve equation between the preset control parameter of the frequency converter for the vacuum pump and the adjusted control parameter, in which the independent variable is the preset control parameter of the frequency converter for the vacuum pump, and the dependent variable is the adjusted control parameter.

[0063] In the embodiments of the present application, the preset control parameter of the frequency converter for the vacuum pump represents the original control parameter of the frequency converter for the vacuum pump, and the adjusted control parameter represents the control parameter obtained after adjustment of the frequency converter for the vacuum pump, so as to improve the adaptability of the frequency converter for the vacuum pump under the corresponding preset operating condition by adjusting the control parameter.

[0064] 104. Obtain the target control parameter of the frequency converter for the vacuum pump.

[0065] In the embodiments of the present application, the target control parameter of the frequency converter for the vacuum pump can be the current, frequency, power and the like required by the vacuum pump. In the related art, the frequency converter can adjust the current applied to the motor in the vacuum pump by using PI control, VF control, vector control, feedback compensation control and the like, so as to drive the vacuum pump according to the target control parameter.

[0066] 105. Determine whether the preset condition is met.

[0067] In the embodiments of the present application, the preset condition is any condition preset and related to the vacuum pump, for example, the condition that the target control parameter is within the preset control parameter range in the embodiment shown in FIG. 5. Of course, other conditions can also be preset as the preset condition based on actual needs, which are not limited herein.

[0068] 106. If the preset condition is met, the following steps are performed: taking the target control parameter as a preset control parameter, determining the adjusted control parameter associated with the target control parameter in the target correlation, replacing the target control parameter with the adjusted control parameter associated with the target control parameter, so that the frequency converter drives the vacuum pump according to the replaced target control parameter.

[0069] In the embodiments of the present application, the target control parameter is taken as a preset control parameter, that is, the original control parameter of the frequency converter for the vacuum pump, and then the adjusted control parameter associated with the target control parameter is determined in the target correlation. The adjusted control parameter associated with the target control parameter is the control parameter obtained after adjustment of the target control parameter.

[0070] In the embodiments of the present application, the target control parameter is replaced by the adjusted control parameter associated with the target control parameter, so that the frequency converter can adjust the current applied to the motor in the vacuum pump according to the replaced target control parameter by using PI control, VF control, vector control, feedback compensation control and the like, to realize control of the vacuum pump.

[0071] In addition, after step 106, performance monitoring and power consumption measurement can also be performed on the vacuum pump to obtain performance index parameters and power consumption parameters of the vacuum pump, so as to facilitate subsequent maintenance and optimization of the vacuum pump and the frequency converter by the technicians based on the performance index parameters and the power consumption parameters.

[0072] It can be seen that, in the above embodiments of the present application, the current operating condition of the vacuum pump is determined based on the current operating parameters of the vacuum pump, the target association relationship under the current operating condition is determined from the plurality of preset association relationships, and if the preset condition is met, the target control parameter of the frequency converter to the vacuum pump is replaced by using the target association relationship, so that the target control parameter can change with different operating conditions, thereby improving the adaptability of the frequency converter to different operating conditions of the vacuum pump, and the efficiency and stability of the vacuum pump can also be improved, and it is more environmentally friendly and energy-saving.

[0073] In some embodiments of the present application, as shown in FIG. 2, the generation process of the preset association relationship is described based on the embodiment shown in FIG. 1. Specifically, the preset association relationship can be generated by the following steps:

[0074] 201, obtaining a historical control parameter of the frequency converter to the vacuum pump at a historical time, and an adjusted historical control parameter obtained by adjusting the historical control parameter.

[0075] In the embodiments of the present application, the preset association relationship is obtained by analyzing the previous test of the vacuum pump, and each time in the previous test is regarded as a historical time. For each historical time, the historical control parameter of the frequency converter to the vacuum pump at the historical time and the adjusted historical control parameter obtained by adjusting the historical control parameter at the historical time can be obtained.

[0076] Among them, similar to the target control parameter of the frequency converter to the vacuum pump, the historical control parameter of the frequency converter to the vacuum pump at the historical time can include the current, frequency, power and the like required by the vacuum pump at the historical time.

[0077] The adjusted historical control parameters, obtained by adjusting the historical control parameters at a specific historical moment, can be achieved through manual adjustment of the historical control parameters by vacuum pump technicians at that historical moment. Specifically, at a historical moment, vacuum pump technicians can manually adjust the historical control parameters based on past experience to improve the efficiency and stability of the vacuum pump. The adjusted historical control parameters that offer higher efficiency and stability are then used as the final adjusted historical control parameters. It can be seen that the adjusted historical control parameters are obtained through manual adjustment and selection by vacuum pump technicians.

[0078] In some embodiments of this application, the preliminary testing of the vacuum pump is described. In the preliminary testing, a prototype vacuum pump needs to be assembled first, and then tested to obtain historical control parameters and adjusted historical control parameters at historical moments. In the step of assembling the vacuum pump prototype, a frequency converter needs to be selected according to the load requirements of the vacuum pump, and then the selected frequency converter is assembled to the vacuum pump (i.e., "frequency converter assembly" shown in step 301 of Figure 3) to obtain the vacuum pump prototype. The load requirements of the vacuum pump generally refer to the maximum power required by the vacuum pump, such as 7.5 kilowatts. When assembling the selected frequency converter to the vacuum pump, the frequency converter needs to be connected to the vacuum pump first, and then the relevant parameters of the vacuum pump (such as the motor type in the vacuum pump, the control method of the frequency converter for the vacuum pump, and the setting of the protection mechanism of the frequency converter for the vacuum pump) need to be set in the frequency converter. During the testing of the vacuum pump prototype, the vacuum pump prototype was driven to run under each preset operating condition in sequence, and it was ensured that the vacuum pump prototype could run normally under each preset operating condition (i.e., “Running normally under each operating condition?” as shown in step 302 of Figure 3). In this way, the historical control parameters and the adjusted historical control parameters at the above historical moments were collected (i.e., “Running data collection and statistics” as shown in step 303 of Figure 3).

[0079] In a further embodiment, the aforementioned steps (connecting the frequency converter to the vacuum pump and then setting the relevant parameters of the vacuum pump in the frequency converter) are illustrated with examples. Specifically, as shown in Figure 4, after selecting the frequency converter, the following steps can be performed in sequence: 401 Preparation before commissioning, 402 Pre-start inspection, 403 Powering on the equipment, 404 Setting basic parameters, 405 Identifying operation, 406 Fine-tuning parameters for various operating conditions, 407 Setting protection functions, and 408 Setting parameters for faults, alarms, and responses.

[0080] 401 The debugging preparation can include 4011 power line type connection, 4012 signal line connection, 4013 insulation measurement, 4014 computer connection and other detailed steps, wherein the power line can be a power line, the signal line can be a control signal line of the frequency converter, the insulation measurement is to test the insulation of the equipment after the frequency converter is connected with the vacuum pump, and the computer is generally an upper computer.

[0081] 402 The pre-starting check can be performed by a technician related to the vacuum pump based on previous experience.

[0082] 404 The basic parameter setting can include 4041 selection of units, 4042 setting of motor type, 4043 setting of motor control mode, 4044 setting of motor rated value, 4045 checking of motor direction, 4046 setting of starting and stopping mode, and 4047 setting of acceleration and deceleration time. The motor type refers to the type of motor in the vacuum pump, and the motor control mode refers to the control mode of the frequency converter for the vacuum pump. As can be seen, these basic parameters can be set by a technician related to the vacuum pump based on actual needs.

[0083] 202, based on the historical control parameter and the adjusted historical control parameter, a preset correlation relationship is generated, wherein the historical control parameter is taken as a preset control parameter in the preset correlation relationship, and the adjusted historical control parameter is taken as an adjusted control parameter associated with the historical control parameter.

[0084] In the embodiments of the present application, the historical control parameter and the adjusted historical control parameter at the same historical moment are taken as a set of associated data (i.e. associated preset control parameters and adjusted control parameters) for comprehensive analysis to obtain the corresponding preset correlation relationship (i.e. "system analysis and modeling" shown in step 304 in FIG. 3).

[0085] In some embodiments of the present application, in order to obtain the preset correlation relationship under different preset operating conditions, based on the historical control parameter and the adjusted historical control parameter, the preset correlation relationship is generated, which can include: obtaining a historical operating parameter of the vacuum pump at the historical moment, the historical operating parameter including at least one of the current, frequency, power, voltage of the motor in the vacuum pump, the temperature of the vacuum pump, the pumping speed of the vacuum pump, and the vacuum degree of the vacuum pump at the historical moment; based on the historical operating parameter, the historical operating condition of the vacuum pump at the historical moment is determined in a plurality of preset operating conditions, and the specific content of this step is similar to that of step 102, which will not be repeated here; based on the historical control parameter and the adjusted historical control parameter, the preset correlation relationship under the historical operating condition is generated. After obtaining the preset correlation relationship under a single historical operating condition, the preset correlation relationship under other preset operating conditions can be obtained in a similar manner, and then the preset correlation relationships under a plurality of different preset operating conditions are obtained.

[0086] In a further embodiment, based on the historical control parameters and the adjusted historical control parameters, the preset correlation under the historical operating condition can be generated, which can include: taking the historical control parameters as the horizontal coordinates in a preset coordinate system, and taking the adjusted historical control parameters as the vertical coordinates in the preset coordinate system, to obtain a coordinate point in the preset coordinate system; after obtaining multiple coordinate points under the same historical operating condition, the multiple coordinate points are fitted to obtain a curve equation, for example, the multiple coordinate points can be first curve-fitted to obtain a curve, and then the equation conforming to the curve is taken as the curve equation; based on the curve equation, the preset correlation under the historical operating condition is generated, for example, the preset correlation under the historical operating condition can include the curve equation.

[0087] As can be seen, in the above embodiments of the present application, based on the historical control parameters of the frequency converter to the vacuum pump at the historical time and the adjusted historical control parameters obtained after adjusting the historical control parameters, the preset correlation is generated, so that the preset correlation can improve the adaptability of the frequency converter to different working condition stages of the vacuum pump.

[0088] In a further embodiment, since the preset correlation is fitted based on the historical control parameters and the adjusted historical control parameters, it can not completely match the actual load of the vacuum pump under the preset operating condition, therefore, after step 106, the target correlation can be further debugged and small batch process verification tested (PVT). Specifically, after step 106, the technicians related to the vacuum pump can evaluate the efficiency and stability of the vacuum pump, if the evaluation result is that the efficiency and stability of the vacuum pump do not meet the expected requirements, the target correlation can be fine-tuned. If the evaluation result is that the efficiency and stability of the vacuum pump meet the expected requirements (i.e. "debugging verification, reach control target?" shown in step 306 in FIG. 3), the target correlation is not fine-tuned, and then the target correlation and other data are solidified and retained, so as to facilitate subsequent small batch verification.

[0089] In some embodiments of the present application, if additional PLC (Programmable Logic Controller), host computer and other devices are added to implement the above steps 101 to 106, the cost of the vacuum pump control will be increased. Therefore, in the present embodiment, no additional devices are added, but the preset programming interface of the frequency converter itself is used to implement the above steps 101 to 106, so as to make full use of the resources of the frequency converter itself, reduce the cost of the vacuum pump control and the subsequent device maintenance cost. Specifically, after generating the preset correlation relationship under the historical running conditions based on the curve equation, the preset correlation relationship under the historical running conditions is written into the frequency converter based on the preset programming interface of the frequency converter (i.e. the "adaptive programming design" shown in step 305 in FIG. 3), so as to use the frequency converter to execute the above steps 101 to 106. For example, the preset correlation relationship under the historical running conditions can be programmed into the frequency converter by using the preset programming interface of the frequency converter, so that the frequency converter can receive the written preset correlation relationship based on the preset programming interface. In this way, the frequency converter can automatically execute the above steps 101 to 106.

[0090] In some embodiments of the present application, as shown in FIG. 5, on the basis of the embodiments shown in FIG. 1 or FIG. 2, determining whether the preset condition is met can include:

[0091] 501. Obtain a preset control parameter range set for the target correlation relationship.

[0092] In the embodiments of the present application, in some special cases, although the target correlation relationship can improve the adaptability of the frequency converter to the current running condition of the vacuum pump, the effect of the improved adaptability is not ideal. For example, in some special cases, the adjusted control parameter replacing the target control parameter by using the target control parameter correlation can improve the efficiency and stability of the vacuum pump, but the effect of the improved efficiency and stability is not ideal. Therefore, in the present embodiment, a corresponding preset control parameter range is set for each preset correlation relationship, which represents a control parameter range that can improve the effect of the efficiency and stability of the vacuum pump. The preset control parameter range can be determined by the vacuum pump related technicians based on experience in the early testing process of the vacuum pump.

[0093] 502. If the target control parameter is within the preset control parameter range, it is determined that the preset condition is met.

[0094] In the embodiments of the present application, if the target control parameter is within the preset control parameter range, it indicates that the target correlation relationship can improve the effect of the efficiency and stability of the vacuum pump. Therefore, it is determined that the preset condition is met, so that step 106 and subsequent steps can be executed to improve the efficiency and stability of the vacuum pump.

[0095] 503、if the target control parameter is not within the preset control parameter range, it is determined that the preset condition is not met.

[0096] In the embodiments of the present application, if the target control parameter is not within the preset control parameter range, it indicates that the target correlation relationship is not ideal for improving the efficiency and stability of the vacuum pump, and therefore it is determined that the preset condition is not met.

[0097] In some embodiments of the present application, after it is determined whether the preset condition is met, it can further include: if the preset condition is not met, step 106 and the subsequent steps are not performed, and instead the frequency converter is controlled to drive the vacuum pump according to the original target control parameter, so as to avoid the effect of improving the efficiency and stability of the vacuum pump being not ideal.

[0098] In some embodiments of the present application, referring to FIG. 6, part of the steps in the combination scheme of the embodiment shown in FIG. 1 and the embodiment shown in FIG. 5 are shown. In FIG. 6, after the system in which the frequency converter and the vacuum pump are located is running (step 601 "system running"), the target control parameter 602 of the frequency converter to the vacuum pump can be obtained (the target control parameter 602 can include: current 6021, frequency 6022, power 6023, etc.). If the target control parameter is within the preset control parameter range, i.e., it meets the mathematical model (step 603 "does it meet the mathematical model?"), therefore the preset programming interface of the frequency converter is used (step 604 "enable the preset programming interface") to perform step 106 and the subsequent steps, so that the frequency converter drives the vacuum pump according to the replaced target control parameter (step 605 "replace the target control parameter"). If the target control parameter is not within the preset control parameter range, i.e., it does not meet the mathematical model, therefore step 106 and the subsequent steps are not performed, and instead the frequency converter is controlled to drive the vacuum pump according to the original target control parameter. When step 106 and the subsequent steps are performed by using the preset programming interface of the frequency converter, step 106 and the subsequent steps can be performed by using the arithmetic operation 6041, the logic operation 6042, the selection operation 6043, the comparison operation 6044, the time and space 6045, the operation block 6046, etc. of the preset programming interface.

[0099] In a second aspect, based on the above-mentioned embodiments of the method for controlling the vacuum pump based on the frequency converter, embodiments of the present application provide a device for controlling the vacuum pump based on the frequency converter, which is used to perform the steps in any of the above-mentioned embodiments of the method for controlling the vacuum pump based on the frequency converter. The device for controlling the vacuum pump based on the frequency converter can be, for example, a frequency converter or a control module in the frequency converter. As shown in FIG. 7, the device for controlling the vacuum pump based on the frequency converter 700 can include:

[0100] The first acquisition module 701 is configured to acquire the current running parameter of the vacuum pump.

[0101] The first determining module 702 is configured to determine a current operation condition of the vacuum pump from a plurality of preset operation conditions based on the current operation parameter.

[0102] The second determining module 703 is configured to determine a target correlation in the current operation condition from a plurality of preset correlations, wherein each preset correlation includes a preset control parameter of the frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter.

[0103] The second obtaining module 704 is configured to obtain the target control parameter of the frequency converter to the vacuum pump.

[0104] The condition judging module 705 is configured to judge whether a preset condition is met.

[0105] The third determining module 706 is configured to, if the preset condition is met, perform the following steps: taking the target control parameter as a preset control parameter, determining an adjusted control parameter associated with the target control parameter in the target correlation, replacing the target control parameter with the adjusted control parameter associated with the target control parameter, and driving the vacuum pump by the frequency converter according to the replaced target control parameter.

[0106] In a third aspect, an embodiment of the present application provides an electronic device integrating any of the frequency converter-based vacuum pump control devices provided by the embodiments of the present application. The electronic device includes a processor and a memory, and the memory stores a computer program configured to be executed by the processor to implement the frequency converter-based vacuum pump control method as described in any of the above embodiments, for example:

[0107] obtaining a current operation parameter of a vacuum pump; determining a current operation condition of the vacuum pump from a plurality of preset operation conditions based on the current operation parameter; determining a target correlation in the current operation condition from a plurality of preset correlations, wherein each preset correlation includes a preset control parameter of a frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter; obtaining a target control parameter of the frequency converter to the vacuum pump; judging whether a preset condition is met; and if the preset condition is met, performing the following steps: taking the target control parameter as a preset control parameter, determining an adjusted control parameter associated with the target control parameter in the target correlation, replacing the target control parameter with the adjusted control parameter associated with the target control parameter, and driving the vacuum pump by the frequency converter according to the replaced target control parameter.

[0108] In one example, as shown in FIG. 8, a structural schematic diagram of an electronic device related to the embodiments of the present application is shown, in particular:

[0109] The electronic device can include a processor 801 having one or more processing cores, a memory unit 802 having one or more computer-readable storage media, a power supply 803, and an input unit 804, etc. Those skilled in the art can understand that the electronic device structure shown in FIG. 8 does not constitute a limitation on the electronic device, and can include more or fewer components than shown, or combine certain components, or different component arrangements. Among them:

[0110] The processor 801 is the control center of the electronic device, connects various parts of the entire electronic device through various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and / or modules stored in the memory unit 802, and calling data stored in the memory unit 802, thereby overall monitoring the electronic device. Optionally, the processor 801 can include one or more processing cores; preferably, the processor 801 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and computer programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 801.

[0111] The memory unit 802 can be used to store software programs and modules, and the processor 801 executes various function applications and data processing by running the software programs and modules stored in the memory unit 802. The memory unit 802 can mainly include a program storage area and a data storage area, wherein the program storage area can store the operating system, at least one computer program required by the function (such as sound playing function, image playing function, etc.), etc.; the data storage area can store data created according to the use of the electronic device, etc. In addition, the memory unit 802 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory unit 802 can also include a memory controller to provide access for the processor 801 to the memory unit 802.

[0112] The electronic device also includes a power supply 803 for powering various components, and preferably the power supply 803 can be logically connected to the processor 801 through a power management system, so as to realize the functions of managing charging, discharging, and power consumption management, etc. through the power management system. The power supply 803 can also include one or more direct or alternating current power supplies, recharging systems, power supply fault detection circuits, power supply converters or inverters, power supply status indicators, etc. any components.

[0113] The electronic device can further include an input unit 804, which can be used to receive inputted digital or character information, and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0114] Although not shown, the electronic device can further include a display unit or the like, which will not be described here. In particular in the embodiments of the present application, the processor 801 in the electronic device will load one or more computer programs corresponding to the executable files of the processes of the computer programs into the storage unit 802 according to the following instructions, and run the computer programs stored in the storage unit 802 by the processor 801, so as to realize various functions, for example:

[0115] Obtaining a current running parameter of the vacuum pump; determining a current running condition of the vacuum pump among a plurality of preset running conditions based on the current running parameter; determining a target association relationship in the current running condition among a plurality of preset association relationships, wherein each preset association relationship includes a preset control parameter of the frequency converter to the vacuum pump, and an adjusted control parameter associated with the preset control parameter; obtaining a target control parameter of the frequency converter to the vacuum pump; determining whether a preset condition is met; if the preset condition is met, performing the following steps: taking the target control parameter as a preset control parameter, and determining an adjusted control parameter associated with the target control parameter in the target association relationship, and replacing the target control parameter with the adjusted control parameter associated with the target control parameter, so that the frequency converter drives the vacuum pump according to the replaced target control parameter.

[0116] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which can include a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, etc. The computer readable storage medium stores a computer program configured to be executed by a processor to implement the variable frequency converter based vacuum pump control method according to any one of the above embodiments, for example:

[0117] Obtaining a current running parameter of the vacuum pump; determining a current running condition of the vacuum pump in a plurality of preset running conditions based on the current running parameter; determining a target association relationship in the current running condition in a plurality of preset association relationships, wherein each preset association relationship comprises a preset control parameter of the frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter; obtaining a target control parameter of the frequency converter to the vacuum pump; determining whether a preset condition is met; if the preset condition is met, performing the following steps: taking the target control parameter as a preset control parameter, determining an adjusted control parameter associated with the target control parameter in the target association relationship, and replacing the target control parameter with the adjusted control parameter associated with the target control parameter, so that the frequency converter drives the vacuum pump according to the replaced target control parameter.

[0118] In a fifth aspect, embodiments of the present application provide a computer program product or computer program, which comprises computer instructions stored in a computer readable storage medium. A processor of an electronic device reads the computer instructions from the computer readable storage medium and executes the computer instructions, so that the electronic device performs the variable frequency converter based vacuum pump control method as described in any one of the above aspects, for example:

[0119] Obtaining a current running parameter of the vacuum pump; determining a current running condition of the vacuum pump in a plurality of preset running conditions based on the current running parameter; determining a target association relationship in the current running condition in a plurality of preset association relationships, wherein each preset association relationship comprises a preset control parameter of the frequency converter to the vacuum pump and an adjusted control parameter associated with the preset control parameter; obtaining a target control parameter of the frequency converter to the vacuum pump; determining whether a preset condition is met; if the preset condition is met, performing the following steps: taking the target control parameter as a preset control parameter, determining an adjusted control parameter associated with the target control parameter in the target association relationship, and replacing the target control parameter with the adjusted control parameter associated with the target control parameter, so that the frequency converter drives the vacuum pump according to the replaced target control parameter.

[0120] The above describes the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description of the present application should not be understood as a limitation.

Claims

1. A variable frequency drive-based vacuum pump control method, characterized by, The variable frequency-based vacuum pump control method comprises: acquiring a current operating parameter of a vacuum pump; determining a current operating condition of the vacuum pump among a plurality of preset operating conditions based on the current operating parameter; determining a target correlation in the current operating condition among a plurality of preset correlations, wherein each of the preset correlations comprises a preset control parameter of a variable frequency device to the vacuum pump, and an adjusted control parameter associated with the preset control parameter; acquiring a target control parameter of the variable frequency device to the vacuum pump; determining whether a preset condition is met; if the preset condition is met, performing the following steps: taking the target control parameter as one of the preset control parameters, determining the adjusted control parameter associated with the target control parameter in the target correlation, replacing the target control parameter with the adjusted control parameter associated with the target control parameter, and driving the vacuum pump by the variable frequency device according to the replaced target control parameter.

2. The frequency inverter-based vacuum pump control method of claim 1, wherein, The preset correlation is generated by the following steps: acquiring a historical control parameter of the variable frequency device to the vacuum pump at a historical time, and an adjusted historical control parameter obtained by adjusting the historical control parameter; generating the preset correlation based on the historical control parameter and the adjusted historical control parameter, wherein the historical control parameter is taken as one of the preset control parameters in the preset correlation, and the adjusted historical control parameter is taken as the adjusted control parameter associated with the historical control parameter.

3. The frequency inverter-based vacuum pump control method of claim 2, wherein, The preset correlation is generated based on the historical control parameter and the adjusted historical control parameter, comprising: acquiring a historical operating parameter of the vacuum pump at the historical time; determining a historical operating condition of the vacuum pump at the historical time among a plurality of preset operating conditions based on the historical operating parameter; generating the preset correlation in the historical operating condition based on the historical control parameter and the adjusted historical control parameter.

4. The frequency inverter-based vacuum pump control method of claim 3, wherein, The preset correlation in the historical operating condition is generated based on the historical control parameter and the adjusted historical control parameter, comprising: taking the historical control parameter as a horizontal coordinate in a preset coordinate system, and taking the adjusted historical control parameter as a vertical coordinate in the preset coordinate system, and fitting to obtain a curve equation; generating the preset correlation in the historical operating condition based on the curve equation.

5. The frequency inverter-based vacuum pump control method of claim 4, wherein, After the preset correlation in the historical operating condition is generated based on the curve equation, the method further comprises: writing the preset correlation in the historical operating condition into the variable frequency device based on a preset programming interface of the variable frequency device, so as to execute the step of determining the target correlation in the current operating condition among a plurality of preset correlations by using the variable frequency device.

6. The frequency inverter-based vacuum pump control method according to any one of claims 1 to 5, characterized by, The determination of whether the preset condition is met comprises: acquiring a preset control parameter range set for the target correlation; if the target control parameter is within the preset control parameter range, it is determined that the preset condition is met; If the target control parameter is not within the preset control parameter range, it is determined that the preset condition is not met.

7. The frequency inverter-based vacuum pump control method of claim 6, wherein, After the determination of whether the preset condition is met, the method further includes: If the preset condition is not met, the frequency converter is controlled to drive the vacuum pump according to the target control parameter.

8. A vacuum pump control device based on a frequency converter, characterized in that, The frequency converter-based vacuum pump control device includes: A first acquisition module configured to acquire a current operating parameter of the vacuum pump; A first determination module configured to determine, based on the current operating parameter, a current operating condition of the vacuum pump from among a plurality of preset operating conditions; A second determination module configured to determine, from among a plurality of preset correlation relationships, a target correlation relationship in the current operating condition, wherein each of the preset correlation relationships includes a preset control parameter of the frequency converter for the vacuum pump, and an adjusted control parameter associated with the preset control parameter; A second acquisition module configured to acquire a target control parameter of the frequency converter for the vacuum pump; A condition determination module configured to determine whether a preset condition is met; A third determination module configured to, if the preset condition is met, perform the following steps: take the target control parameter as one of the preset control parameters, determine, in the target correlation relationship, an adjusted control parameter associated with the target control parameter, replace the target control parameter with the adjusted control parameter associated with the target control parameter, and control the frequency converter to drive the vacuum pump according to the replaced target control parameter.

9. An electronic device, comprising: The electronic device includes a processor and a memory, and the memory stores a computer program configured to be executed by the processor to implement the frequency converter-based vacuum pump control method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program configured to be executed by a processor to implement the frequency converter-based vacuum pump control method of any one of claims 1 to 7.

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