Control method, device and equipment of diaphragm compressor and medium

Abstract

The invention provides a control method and device of a diaphragm compressor, equipment and a medium. The method comprises the steps of obtaining current working condition data of the diaphragm compressor; the current working condition data is compared with preset working condition data, a data comparison result is obtained, and the preset working condition data is the required range of the gas pressure data, the gas flow data, the load data and the motor rotating speed data; if the data comparison result represents that the current working condition data does not meet the preset working condition data, generating a working condition adjusting instruction which is used for adjusting the rotating speed of the motor; generating a motor rotating speed control instruction according to the working condition adjusting instruction, and controlling the motor rotating speed of the diaphragm compressor according to the motor rotating speed control instruction, so that the working condition data of the diaphragm compressor meet preset working condition data. According to the method, the energy utilization efficiency is remarkably improved, and it is guaranteed that the diaphragm compressor always operates in an efficient and safe state.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a control method, device, equipment and medium for a diaphragm compressor. Background Art

[0002] In recent years, with the continuous development of new energy technologies, diaphragm compressors have also been widely used in new energy fields such as hydrogen refueling stations. In hydrogen refueling stations, diaphragm compressors are used to pressurize the hydrogen in the tube bundle car and store it in a fixed storage tank. This application not only requires the compressor to have efficient compression capacity and good sealing, but also requires it to be able to adapt to the special properties of hydrogen, such as flammability, explosion, low density, etc., providing strong support for the safe operation of hydrogen refueling stations.

[0003] Existing diaphragm compressors use ordinary motors selected based on maximum load during the pressurization process and implement a fixed speed drive solution.

[0004] However, existing diaphragm compressors use fixed speed drives, which leads to problems such as insufficient drive flexibility and increased energy loss. Summary of the invention

[0005] The present application provides a control method, device, equipment and medium for a diaphragm compressor, which is used to solve the technical problem that the existing diaphragm compressor cannot be flexibly adjusted according to actual load changes, resulting in energy waste.

[0006] In a first aspect, the present application provides a control method for a diaphragm compressor, comprising:

[0007] Acquire current operating data of the diaphragm compressor, wherein the operating data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data;

[0008] Comparing the current working condition data with preset working condition data to obtain a data comparison result, wherein the preset working condition data is a required range for gas pressure data, gas flow data, load data and motor speed data;

[0009] If the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, a working condition adjustment instruction is generated, and the working condition adjustment instruction is used to adjust the motor speed;

[0010] A motor speed control instruction is generated according to the working condition adjustment instruction, and the motor speed of the diaphragm compressor is controlled according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

[0011] Optionally, the current operating data of the diaphragm compressor is obtained, including:

[0012] Controlling the start of the diaphragm compressor, and turning on a pressure sensor for collecting gas pressure of the diaphragm compressor and a flow sensor for collecting gas flow;

[0013] The operating data of the diaphragm compressor, the gas pressure data displayed by the pressure sensor, and the gas flow data displayed by the flow sensor are acquired.

[0014] Optionally, before comparing the current operating condition data with the preset operating condition data to obtain a data comparison result, the method further includes:

[0015] Obtaining gas pressure level data, gas flow level data, diaphragm compressor load level data, and diaphragm compressor motor speed level data;

[0016] The preset working condition data of the diaphragm compressor is obtained according to each gas pressure level data, each gas flow level data, each load level data of the diaphragm compressor and each motor speed level data of the diaphragm compressor.

[0017] Optionally, the preset operating condition data includes any one of low-pressure operating condition data, medium-pressure operating condition data or high-pressure operating condition data;

[0018] The low-pressure working condition data refers to the data when the gas pressure level is low, the gas flow level is low, the diaphragm compressor load level is high, and the diaphragm compressor motor speed level is high;

[0019] The medium-pressure working condition data refers to data when the gas pressure level is medium, the gas flow level is medium, the diaphragm compressor load level is medium, and the diaphragm compressor motor speed level is medium;

[0020] The high-pressure operating condition data refers to data when the gas pressure level is high, the gas flow level is high, the diaphragm compressor load level is low, and the diaphragm compressor motor speed level is low.

[0021] Optionally, if the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, generating an operating condition adjustment instruction includes:

[0022] If the preset working condition data is high-pressure working condition data, and the current working condition data is low-pressure working condition data or medium-pressure working condition data, then a working condition adjustment instruction for switching the working condition to medium pressure or high pressure is generated;

[0023] If the preset working condition data is medium pressure working condition data, and the current working condition data is high pressure working condition data, an adjustment instruction for switching the working condition to high pressure is generated;

[0024] If the preset working condition data is medium-pressure working condition data, and the current working condition data is low-pressure working condition data, an adjustment instruction for switching the working condition to low pressure is generated;

[0025] If the preset operating condition data is low-pressure operating condition data, and the current operating condition data is medium-pressure operating condition data or high-pressure operating condition data, an adjustment instruction for switching the operating condition to medium pressure or high pressure is generated.

[0026] Optionally, generating a motor speed control instruction according to the working condition adjustment instruction includes:

[0027] If the preset working condition data is high-voltage working condition data, generating the motor speed control instruction for increasing the motor speed according to the working condition adjustment instruction;

[0028] If the preset working condition data is low-voltage working condition data, generating the motor speed control instruction for reducing the motor speed according to the working condition adjustment instruction;

[0029] If the preset working condition data is medium-voltage working condition data, and the current working condition data is low-voltage working condition data, the working condition adjustment instruction generates the motor speed control instruction for increasing the motor speed;

[0030] If the preset operating condition data is medium-pressure operating condition data, and the current operating condition data is high-pressure operating condition data, the operating condition adjustment instruction generates the motor speed control instruction for reducing the motor speed.

[0031] Optionally, the method further comprises:

[0032] The current operating condition data is repeatedly collected to generate an operating condition adjustment instruction according to the preset operating condition data to control the motor speed in real time.

[0033] In a second aspect, the present application provides a control device for a diaphragm compressor, comprising:

[0034] A working condition data acquisition module, used to acquire current working condition data of the diaphragm compressor, wherein the working condition data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data;

[0035] A data comparison result obtaining module is used to compare the current working condition data with the preset working condition data to obtain a data comparison result, wherein the preset working condition data is a required range for gas pressure data, gas flow data, load data and motor speed data;

[0036] A working condition adjustment instruction generating module, used for generating a working condition adjustment instruction if the data comparison result indicates that the current working condition data does not meet the preset working condition data, wherein the working condition adjustment instruction is used for adjusting the motor speed;

[0037] The motor speed control module is used to generate a motor speed control instruction according to the working condition adjustment instruction, and control the motor speed of the diaphragm compressor according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

[0038] In a third aspect, the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0039] The memory stores computer-executable instructions;

[0040] The processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect.

[0041] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the method described in the first aspect.

[0042] The control method, device, equipment and medium of the diaphragm compressor provided by the present application obtain the current working condition data of the diaphragm compressor, the working condition data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data; compare the current working condition data with the preset working condition data to obtain the data comparison result, the preset working condition data is the required range for the gas pressure data, gas flow data, load data and motor speed data; if the data comparison result indicates that the current working condition data does not meet the preset working condition data, then generate a working condition adjustment instruction, the working condition adjustment instruction is used to adjust the motor speed; generate a motor speed control instruction according to the working condition adjustment instruction, and control the motor speed of the diaphragm compressor according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data, thereby realizing the technical effect of automatically adjusting the motor speed according to the load change of the diaphragm compressor, so that the diaphragm compressor can maintain efficient operation under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 The overall architecture diagram of the control method for the diaphragm compressor provided in this application;

[0045] Figure 2 A schematic flow chart of a first embodiment of a control method for a diaphragm compressor provided in the present application;

[0046] Figure 3A schematic flow chart of a second embodiment of a control method for a diaphragm compressor provided in the present application;

[0047] Figure 4 A schematic flow chart of a third embodiment of a control method for a diaphragm compressor provided in the present application;

[0048] Figure 5 A schematic flow chart of a fourth embodiment of a control method for a diaphragm compressor provided in the present application;

[0049] Figure 6 A schematic flow chart of a fifth embodiment of a control method for a diaphragm compressor provided in the present application;

[0050] Figure 7 A schematic flow chart of a sixth embodiment of a control method for a diaphragm compressor provided in the present application;

[0051] Figure 8 An overall flow chart of the control method for the diaphragm compressor provided in the present application;

[0052] Fig. 9 A schematic diagram of the structure of a control device for a diaphragm compressor provided in an embodiment of the present application;

[0053] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0056] Existing diaphragm compressors usually use a fixed speed drive mode, that is, the motor speed cannot be dynamically adjusted according to changes in load and working conditions during operation. This design leads to significant problems in practical applications. For example, as the gas pressure in the tube bundle gradually decreases, the diaphragm compression ratio increases, the compressor load continues to rise, and the energy utilization efficiency is significantly reduced. In addition, fixed speed drive will cause increased noise and vibration during equipment operation, shortening the service life of the equipment. At the same time, the compressor is prone to overload operation under high load conditions, affecting performance and reliability. These problems severely limit the efficiency and applicability of diaphragm compressors.

[0057] In view of the above-mentioned problems in the prior art, the present invention proposes a diaphragm compressor control method based on real-time monitoring and dynamic control, which realizes the automatic adjustment of the compressor speed through the coordinated work of the control system, sensor network and variable frequency drive system. Specifically, the present invention designs a closed-loop control system to collect operating data such as gas pressure, flow, motor speed and load in real time, and compares these data with the preset typical operating range. According to the comparison results, the control system generates an operating condition adjustment instruction, adjusts the motor speed through the variable frequency drive system, so as to adapt to the current load demand, ensure that the equipment always operates in an efficient and safe state, significantly improve the energy utilization efficiency, reduce the operating noise and vibration of the diaphragm compressor, and extend the service life of the equipment, providing an intelligent and efficient solution for dynamic demand scenarios.

[0058] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0059] Figure 1 This is the overall architecture diagram of the control method of the diaphragm compressor provided in this application. Figure 1 As shown in the figure, the architecture diagram shows the complete operation structure of the diaphragm compressor control system. It includes:

[0060] The mass flow meter 101 is used to monitor the quality of the gas entering the diaphragm compressor in real time, ensure the real-time collection of the gas quality, and provide a basis for the working condition data.

[0061] The air inlet buffer tank 102 is used to stabilize the gas flow entering the diaphragm compressor, eliminate air flow pulsation, and ensure the stability of the compressor's inlet pressure and flow.

[0062] The pressure transmitter 103 is used to monitor the pressure change of the gas in real time and is distributed at multiple nodes of the inlet and outlet pipelines. It has two functions: one is inlet pressure monitoring, which is used to determine the pressure state of the gas before entering the diaphragm compressor, and the other is outlet pressure monitoring, which is used to determine whether the compressor output gas meets the preset working condition requirements.

[0063] The cooler 104 , which is located at the inlet and outlet of the diaphragm compressor 105 , is used to reduce the gas temperature to ensure that the gas temperature remains within a safe range during the compression process. In addition, the impact of high temperature on various mechanical components in the diaphragm compressor 105 can be reduced.

[0064] The diaphragm compressor 105 is used for efficient compression of gas, and realizes a leak-free compression process through the diaphragm to ensure gas purity. In addition, the compression ratio and compression capacity are adjusted in real time by controlling the motor speed and load.

[0065] The flywheel 106 is used to balance the inertial fluctuations during the operation of the machine to improve the stability of the operation.

[0066] The motor 107 is used to provide power. The motor speed is controlled by the variable frequency drive system 108, which can directly determine the operating state of the diaphragm compressor 105.

[0067] The variable frequency drive system 108 is used to receive instructions from the control system and adjust the speed of the motor 107 by changing the power supply frequency, thereby achieving precise control of the operating state of the diaphragm compressor 105.

[0068] The control system 109 is used to collect real-time data (such as pressure, flow, speed, etc.) from sensors, generate working condition adjustment instructions through data comparison, and transmit them to the variable frequency drive system 108 .

[0069] The overall framework diagram provided in the embodiment of the present application shows the full-process control system of the diaphragm compressor. By real-time collection of data such as pressure and flow, combined with the linkage of the control system and the variable frequency drive system, the motor speed of the diaphragm compressor and the operating state of the diaphragm compressor can be dynamically adjusted. The entire system is efficient, energy-saving and stable, and is particularly suitable for scenes with high requirements for gas compression accuracy, such as chemical, pharmaceutical and hydrogenation stations.

[0070] Figure 2 This is a flow chart of the control method for the diaphragm compressor provided in the present application. Figure 2 As shown, the method includes:

[0071] S201. Obtain current operating data of the diaphragm compressor.

[0072] Among them, the current operating condition data refers to the real-time data collected by sensors during the actual operation of the diaphragm compressor, including gas pressure data, gas flow data, load status data of the diaphragm compressor (i.e. the load degree of the equipment operation), and motor speed information, among which the gas can refer to hydrogen.

[0073] For example, when the diaphragm compressor is running, the pressure and flow of hydrogen are monitored in real time by sensors, for example, the pressure of hydrogen is monitored in real time by a pressure sensor, and the requested flow is monitored in real time by a flow sensor. At the same time, the load and motor speed of the diaphragm compressor are collected in combination with the data interface of the variable frequency drive system of the diaphragm compressor. After summarizing the above information, the "current operating condition data" can be formed.

[0074] S202: Compare the current working condition data with the preset working condition data to obtain a data comparison result.

[0075] The preset working condition data is a set of working condition parameter ranges predefined according to the performance requirements and operating characteristics of the diaphragm compressor during the design stage or in actual applications of the diaphragm compressor, such as the optimal value or allowable range of gas pressure data, gas flow data, load data range, and motor speed data. The data comparison result is information generated by comparing the current working condition data with the preset working condition data to indicate whether the current operating state of the diaphragm compressor is within the ideal range.

[0076] Specifically, the collected gas pressure data, gas flow data, diaphragm compressor load data and motor speed data are compared with the preset operating condition data to determine whether the current operating condition data of the diaphragm compressor meets the requirements.

[0077] S203: If the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, a working condition adjustment instruction is generated.

[0078] The operating condition adjustment instruction is used to adjust the motor speed, with the aim of adjusting the current operating state of the diaphragm compressor to within a preset range.

[0079] Specifically, when the data comparison results show that the current operating data does not meet the preset operating data, such as the compression ratio is too large, resulting in excessive load, an adjustment instruction will be automatically generated. Specific instructions may include reducing the motor speed, dynamically controlling the gas flow, etc.

[0080] S204, generating a motor speed control instruction according to the working condition adjustment instruction, and controlling the motor speed of the diaphragm compressor according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

[0081] The motor speed control instruction refers to a specific instruction directly used for the motor control module, which is responsible for adjusting the speed of the diaphragm compressor, thereby changing the operating state of the diaphragm compressor.

[0082] In this step, the working condition adjustment instruction can be further converted into specific motor speed adjustment parameters, such as adjusting the motor frequency value or directly adjusting the motor speed to the target speed. Among them, these parameters can be transmitted to the variable frequency drive module through signals to control the working state of the motor.

[0083] After the variable frequency drive system receives the speed control command, it directly adjusts the motor's operating speed by changing the power supply frequency or other control methods. For example, increasing the motor speed will increase the gas pressure, and reducing the speed will relieve the load pressure or reduce the gas flow. In addition, the real-time monitoring loop will ensure that the adjustment result continues to meet the preset operating range. If the adjustment is not ideal, data collection and comparison will be performed again to form a closed-loop control.

[0084] The control method of the diaphragm compressor provided in the embodiment of the present application obtains the current operating condition data through a pressure sensor and a flow meter, compares it with the preset operating condition, generates an adjustment instruction, and dynamically controls the motor speed of the diaphragm compressor, thereby realizing efficient operation of the diaphragm compressor under different loads, significantly reducing energy consumption, noise and vibration, and improving the performance of the diaphragm compressor and user experience.

[0085] Figure 3 This is a flow chart of the second embodiment of the control method for the diaphragm compressor provided in this application. Figure 3 As shown, in Figure 2 Based on the embodiment, obtaining the current working condition data of the diaphragm compressor includes:

[0086] S301, control to start the diaphragm compressor, and turn on the pressure sensor for collecting the gas pressure of the diaphragm compressor and the flow sensor for collecting the gas flow.

[0087] In this step, the control system starts the diaphragm compressor by sending a start signal, so that the diaphragm compressor enters a normal operating state. This step is the initial link of the entire diaphragm compressor control process, which can ensure that the compressor is in the operating stage of waiting for collection and adjustment of working conditions.

[0088] Then turn on the sensor collection function. Specifically, the pressure sensor can collect real-time gas pressure data when the compressor is working, reflecting the current pressure status in the pipeline or tank. The flow sensor can collect gas flow data in real time to display the gas flow rate or value through the diaphragm compressor. After starting the compressor, turn on the monitoring functions of the pressure sensor and gas sensor in turn to ensure that data collection is carried out synchronously, providing real-time parameter support for the subsequent control of the diaphragm compressor.

[0089] S302, obtaining the operating data of the diaphragm compressor, the gas pressure data displayed by the pressure sensor, and the gas flow data displayed by the flow sensor.

[0090] In this step, the operating data includes the current speed of the diaphragm compressor motor and the equipment load (such as load rate or compression ratio, etc.). These data are directly obtained from the variable frequency drive module or load monitoring device through the control system to display the overall working status of the diaphragm compressor.

[0091] Specifically, the pressure sensor records the gas pressure at the inlet or outlet of the diaphragm compressor in real time and uploads the data to the control system. The collected pressure value can dynamically reflect the current compression capacity and load condition of the diaphragm compressor. The flow sensor monitors the gas flow through the diaphragm compressor and displays the gas delivery rate or total flow. By combining the gas pressure data and the gas flow data, the current operating data of the diaphragm compressor can be more accurately reflected.

[0092] The control method for the diaphragm compressor provided in the embodiment of the present application is the core data acquisition link in the entire control process, which ensures that the key parameters of the compressor during operation (gas pressure, gas flow, motor speed, motor load, etc.) can be fully monitored to fully understand the real-time operation of the diaphragm compressor, thereby providing comprehensive data for comparison and adjustment, and laying a solid foundation for the subsequent optimization control of the diaphragm compressor.

[0093] Figure 4 This is a flow chart of the third embodiment of the control method for the diaphragm compressor provided in this application. Figure 4 As shown, in Figure 2 Based on the embodiment, before comparing the current working condition data with the preset working condition data and obtaining the data comparison result, the method further includes:

[0094] S401, obtaining gas pressure level data, gas flow level data, diaphragm compressor load level data, and diaphragm compressor motor speed level data.

[0095] Among them, the gas pressure level data is the result of dividing the real-time pressure data into multiple levels, such as low pressure, medium pressure or high pressure. Each level represents an operating state, and these level divisions can be defined by preset standards or application scenario requirements of the diaphragm compressor to provide a clear benchmark for subsequent operating condition data comparison.

[0096] Gas flow rating data is similar to gas pressure rating data. Gas flow rating data divides gas flow into multiple intervals, such as low flow, medium flow or high flow. The classification of gas flow rating reflects the typical working mode of diaphragm compressor under different load or pipeline conditions.

[0097] The load level data of the diaphragm compressor divides the load of the compressor into levels according to the proportion, for example, low load level, medium load level and high load level. It should be noted that the load level mainly depends on the change of compression ratio or the design capacity of the compressor, which is used to measure the relative high and low of the current load.

[0098] The motor speed grade data is a classification of the motor speed range, such as low speed, medium speed and high speed. Among them, the motor speed grade data can directly reflect the operating capacity of the compressor under different working conditions.

[0099] S402. Obtain preset working condition data of the diaphragm compressor according to each gas pressure level data, each gas flow level data, each load level data of the diaphragm compressor, and each motor speed level data of the diaphragm compressor.

[0100] According to the gas pressure level data, gas flow level data, diaphragm compressor load registration data and motor speed data, combined with the application scenario requirements of the diaphragm compressor, multiple "preset operating condition data" can be defined, for example, any one of low-pressure operating condition data, medium-pressure operating condition data or high-pressure operating condition data.

[0101] Among them, the low-pressure working condition data refers to the data when the gas pressure level is low, the gas flow level is low, the diaphragm compressor load level is high, and the diaphragm compressor motor speed level is high;

[0102] The medium pressure working condition data refers to the data when the gas pressure level is medium, the gas flow level is medium, the diaphragm compressor load level is medium, and the diaphragm compressor motor speed level is medium;

[0103] The high-pressure working condition data refers to the data when the gas pressure level is high, the gas flow level is high, the diaphragm compressor load level is low, and the diaphragm compressor motor speed level is low.

[0104] According to the reasonable data range corresponding to each preset working condition data, a mapping relationship can be formed. For example, the low-pressure working condition data can be a gas pressure level less than 5MPa, a gas flow level less than 10m 3 / h, load less than 50%, motor speed less than 1000RPM; medium pressure working data can be gas pressure level 5MPa-15MPa, gas flow level 10m 3 / h-50m 3 / h, load at 50%-10%, motor speed at 1000RPM-3000RPM; high pressure working condition data can be gas pressure level greater than 15MPa, gas flow level greater than 50m 3 / h, load greater than 10%, motor speed greater than 3000RPM. This mapping relationship can be used as a standard for subsequent real-time comparison of operating data. When the compressor is running, the mapping relationship can be used to quickly determine whether the current operating data needs to be adjusted. In practical applications, the preset operating data plays the role of a target benchmark, which can ensure that the diaphragm compressor has a comparable standard state at any time.

[0105] The control method for the diaphragm compressor provided in the embodiment of the present application realizes a complete process from data level division to the generation of preset operating condition data. By converting various real-time data into hierarchical information and integrating these hierarchical data, a specific preset operating condition range is generated, providing a clear reference standard, laying the foundation for subsequent comparison and adjustment, and improving the adaptability and responsiveness of the diaphragm compressor under complex operating conditions.

[0106] Figure 5 This is a flow chart of the fourth embodiment of the control method for the diaphragm compressor provided in this application. Figure 5 As shown, in Figures 2 to 4 Based on the embodiment, if the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, a working condition adjustment instruction is generated, including:

[0107] S501. If the preset working condition data is high-pressure working condition data, and the current working condition data is low-pressure working condition data or medium-pressure working condition data, a working condition adjustment instruction for switching the working condition to medium pressure or high pressure is generated.

[0108] In this step, if the preset working condition data corresponds to high-pressure working condition data, and the current working condition data is low-pressure working condition data or medium-pressure working condition data, it indicates that the current operating state of the diaphragm compressor cannot meet the high-pressure demand. For example, if the gas pressure in the preset working condition data is greater than 15MPa, and the current gas pressure is less than 15MPa, the current working condition data needs to be further adjusted. Specifically, it is necessary to generate corresponding adjustment instructions to improve the operating state of the current diaphragm compressor to adapt to high-pressure working conditions.

[0109] S502: If the preset working condition data is medium-pressure working condition data, and the current working condition data is high-pressure working condition data, an adjustment instruction for switching the working condition to high pressure is generated.

[0110] In this step, if the preset working condition data corresponds to medium-pressure working condition data, and the current working condition data is high-pressure working condition data, it indicates that the current operating state of the diaphragm compressor has exceeded the operating requirements of the diaphragm compressor. For example, if the gas pressure in the preset working condition data is 5MPa-15MPa, and the current gas pressure is greater than 15MPa, the current working condition data needs to be further adjusted. Specifically, it is necessary to generate corresponding adjustment instructions to reduce the current operating state of the diaphragm compressor to adapt to the medium-pressure working condition.

[0111] S503: If the preset working condition data is medium-pressure working condition data, and the current working condition data is low-pressure working condition data, an adjustment instruction for switching the working condition to low pressure is generated.

[0112] In this step, if the preset working condition data corresponds to medium-pressure working condition data, and the current working condition data is low-pressure working condition data, it means that the current operating state of the diaphragm compressor cannot meet its own pressure requirements. For example, if the gas pressure in the preset working condition data is 5MPa-15MPa, and the current gas pressure is less than 5MPa, the current working condition data needs to be further adjusted. Specifically, it is necessary to generate corresponding adjustment instructions to improve the current operating state of the diaphragm compressor to adapt to the medium-pressure working condition.

[0113] S504: If the preset working condition data is low-pressure working condition data, and the current working condition data is medium-pressure working condition data or high-pressure working condition data, an adjustment instruction for switching the working condition to medium pressure or high pressure is generated.

[0114] In this step, if the preset working condition data corresponds to low-pressure working condition data, and the current working condition data is medium-pressure working condition data or high-pressure working condition data, it indicates that the current operating state of the diaphragm compressor has exceeded the operating requirements of the diaphragm compressor. For example, if the gas pressure in the preset working condition data is less than 5MPa, and the current gas pressure is greater than 5MPa, the current working condition data needs to be further adjusted. Specifically, it is necessary to generate corresponding adjustment instructions to reduce the current operating state of the diaphragm compressor to adapt to the low-pressure working condition.

[0115] The control method of the diaphragm compressor proposed in the embodiment of the present application describes a flexible working condition adjustment logic. When the current working condition of the diaphragm compressor is inconsistent with the preset working condition, a corresponding adjustment instruction is generated according to the difference. Then, by flexibly adjusting the pressure, flow, load and speed of the compressor, it is ensured that the diaphragm compressor always operates efficiently under the target working condition, meets the needs of various application scenarios, and reduces the energy consumption and wear of the diaphragm compressor.

[0116] Figure 6 This is a flow chart of the fifth embodiment of the control method for the diaphragm compressor provided in this application. Figure 6 As shown, in Figure 4Based on the embodiment, the motor speed control instruction is generated according to the working condition adjustment instruction, including:

[0117] S601: If the preset operating condition data is high-voltage operating condition data, a motor speed control instruction for increasing the motor speed is generated according to the operating condition adjustment instruction.

[0118] In this step, if the preset working condition data is determined to be high-pressure working condition data, the gas pressure, gas flow, diaphragm compressor load and motor speed all need to be within a high level range, but the current working condition data is displayed as medium-pressure working condition data or low-pressure working condition data, which means that the output of the diaphragm compressor is insufficient to meet the needs of high-pressure working conditions. At this time, it is necessary to further generate working condition adjustment instructions based on the actual working condition data to improve the compression capacity of the diaphragm compressor, that is, to set the adjustment instruction as a control instruction to increase the motor speed, and send it to the variable frequency drive system that drives the diaphragm compressor.

[0119] Specifically, the power supply frequency is increased through the variable frequency drive system, thereby increasing the motor speed. After the motor speed is increased, the compression capacity of the diaphragm compressor is enhanced accordingly, and the operating condition of the diaphragm compressor can be increased to a high-pressure condition.

[0120] S602: If the preset working condition data is low-voltage working condition data, a motor speed control instruction for reducing the motor speed is generated according to the working condition adjustment instruction.

[0121] In this step, if the preset operating condition data shows the demand for low-pressure operating conditions, that is, the gas pressure, gas flow, load of the diaphragm compressor and the motor speed all need to be maintained at low values. This situation is often used in low-pressure scenarios such as when the tube bundle truck is emptied or the buffer tank pressure is controlled. If the current operating condition data shows medium-pressure operating condition data or high-pressure operating condition data, it means that the current operating capacity of the diaphragm compressor exceeds the actual demand, and there is a risk of energy waste or equipment overload. At this time, it is necessary to determine the size of each data in the current operating condition data that exceeds the preset data range based on the preset operating condition data and the current operating condition data, and then generate a "working condition adjustment instruction" to indicate that the compression capacity of the diaphragm compressor needs to be reduced, and then the adjustment instruction is converted into a control instruction of "lowering the motor speed" and sent to the variable frequency drive system that drives the diaphragm compressor.

[0122] For example, the power supply frequency of the diaphragm compressor can be reduced through the frequency conversion drive module, thereby reducing the motor speed of the diaphragm compressor. When the motor speed decreases, the output pressure of the diaphragm compressor will decrease. At this time, the gas pressure will gradually return to the low-pressure operating range.

[0123] S603: If the preset working condition data is medium-voltage working condition data, and the current working condition data is low-voltage working condition data, the working condition adjustment instruction generates a motor speed control instruction for increasing the motor speed.

[0124] In this step, if the preset working condition data is determined to be medium-pressure working condition data, the gas pressure, gas flow, diaphragm compressor load and motor speed all need to be within a medium level range, but the current working condition data is displayed as low-pressure working condition data, which means that the output of the diaphragm compressor is insufficient to meet the needs of the medium-pressure working condition. At this time, it is necessary to further generate working condition adjustment instructions based on the actual working condition data to improve the compression capacity of the diaphragm compressor, that is, to set the adjustment instructions as control instructions for increasing the motor speed to send to the variable frequency drive system of the diaphragm compressor.

[0125] For example, the power supply frequency is increased through a variable frequency drive system, thereby increasing the motor speed. After the motor speed is increased, the diaphragm compressor gradually increases the gas compression capacity, so that the outlet pressure is stabilized within the medium pressure operating range.

[0126] S604: If the preset operating condition data is medium-pressure operating condition data, and the current operating condition data is high-pressure operating condition data, the operating condition adjustment instruction generates a motor speed control instruction for reducing the motor speed.

[0127] In this step, if the preset working condition data shows the demand for medium-pressure working conditions, that is, the gas pressure, gas flow, load of the diaphragm compressor and motor speed all need to be maintained within the medium range, and the current working condition data shows high-pressure working condition data, it means that the current operating capacity of the diaphragm compressor exceeds the actual demand, and there is a risk of energy waste or equipment overload. At this time, it is necessary to determine the extent to which each data in the current working condition data exceeds the preset data range based on the preset working condition data and the current working condition data, and then generate a "working condition adjustment instruction" to indicate that the compression capacity of the diaphragm compressor needs to be reduced, and then convert the adjustment instruction into a control instruction of "lowering the motor speed" and send it to the variable frequency drive system that drives the diaphragm compressor.

[0128] For example, the power supply frequency of the diaphragm compressor can be reduced through the frequency conversion drive module, thereby reducing the motor speed of the diaphragm compressor. When the motor speed drops, the diaphragm compressor gradually reduces the output pressure. At this time, the gas pressure will gradually stabilize to the medium pressure operating range.

[0129] The control method of the diaphragm compressor provided in the embodiment of the present application generates a corresponding motor speed control instruction by analyzing the pressure difference between the current working condition data and the preset working condition data in real time. When the pressure needs to be increased, an instruction to increase the motor speed is generated; when the pressure needs to be reduced, an instruction to reduce the motor speed is generated. Specifically in response to the different requirements of high-pressure working condition data, medium-pressure working condition data and low-pressure working condition data, the power supply frequency and motor speed of the variable frequency drive system are accurately regulated to optimize the operating state of the diaphragm compressor, meet the dynamic working condition requirements, and at the same time improve energy efficiency and reduce the wear of the diaphragm compressor.

[0130] Figure 7 This is a flow chart of the sixth embodiment of the control method for the diaphragm compressor provided in this application. Figure 7 As shown, in Figures 2 to 4 Based on the embodiment, the method further includes:

[0131] S701. Repeatedly collect current working condition data to generate working condition adjustment instructions according to preset working condition data to control the motor speed in real time.

[0132] In this step, the current operating condition data will be repeatedly collected to ensure that the operating status of the diaphragm compressor can reflect the actual situation in real time, and to ensure that the control system can quickly make adjustments when the operating conditions change, thereby dynamically generating operating condition adjustment instructions to optimize the motor speed of the diaphragm compressor in real time.

[0133] The repeated collection of current operating condition data proposed in the embodiment of the present application is a closed-loop control process. Through continuous monitoring and real-time comparison, adjustment instructions are dynamically generated and the motor speed is precisely controlled to ensure that the diaphragm compressor always maintains an efficient and safe operating state under different loads. This real-time control method significantly improves the stability and energy efficiency performance of the equipment in dynamic demand scenarios.

[0134] Figure 8 This is an overall flow chart of the control method of the diaphragm compressor provided in this application. Figure 8 As shown, the overall process includes:

[0135] The control system of the diaphragm compressor starts, the diaphragm compressor starts running, and the pressure sensor and flow sensor start synchronously to collect operating data, including gas flow, pressure parameters, etc. In addition, the control system will perform self-inspections on the sensors, data acquisition modules, and control modules to ensure normal operation. After the self-inspection is successful, it enters the real-time data collection stage. Through sensors, the control system continuously collects current operating data, including gas pressure, flow, and equipment load status.

[0136] The control system will then evaluate the collected data and determine the current load status. For example, the current operating status can be classified by comparing the high-pressure operating data, medium-pressure operating data or low-pressure operating data with the typical operating range. Alternatively, the current operating data can be checked to see if it meets the parameter range of the preset typical operating conditions. If it meets the preset operating parameters, the current operating state is maintained. If it does not meet the preset operating parameters, the next step is to adjust the operating conditions. Specifically, based on the deviation between the current load and the operating parameters, it automatically switches to a more suitable operating condition. For example, switching from low-pressure operating data to medium-pressure operating data, or from high-pressure operating data to medium-pressure operating data.

[0137] According to the working condition data after switching, the control system calculates the target motor speed parameter and generates a speed adjustment instruction, wherein the speed adjustment instruction includes a specific speed value or variable frequency drive parameter. After receiving the speed adjustment instruction, the variable frequency drive adjusts the motor speed. Among them, the change of motor speed directly affects the output pressure and flow of the diaphragm compressor, so that it matches the current working condition requirements.

[0138] In addition, the system continuously repeats the data collection and evaluation process to form a closed-loop control. After each adjustment, the current working conditions are re-tested to ensure that the operating status is always within the preset range.

[0139] This application dynamically adjusts the motor speed through real-time data collection, load evaluation and working condition switching to ensure that the diaphragm compressor always operates in the optimal state. The whole process is centered on closed-loop feedback and is efficient, stable and intelligent, which is very suitable for the dynamic needs of complex working conditions in hydrogen stations or industries.

[0140] Fig. 9 This is a schematic diagram of the structure of the control device of the diaphragm compressor provided in the embodiment of the present application. Fig. 9 As shown, the control device 90 of the diaphragm compressor includes:

[0141] The working condition data acquisition module 901 is used to acquire the current working condition data of the diaphragm compressor, and the working condition data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data.

[0142] The data comparison result obtaining module 902 is used to compare the current working condition data with the preset working condition data to obtain the data comparison result. The preset working condition data is the required range for gas pressure data, gas flow data, load data and motor speed data.

[0143] The operating condition adjustment instruction generating module 903 is used to generate an operating condition adjustment instruction if the data comparison result indicates that the current operating condition data does not meet the preset operating condition data. The operating condition adjustment instruction is used to adjust the motor speed.

[0144] The motor speed control module 904 is used to generate a motor speed control instruction according to the working condition adjustment instruction, and control the motor speed of the diaphragm compressor according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

[0145] Furthermore, the operating condition data acquisition module 901 is also specifically used for:

[0146] Control to start the diaphragm compressor, and turn on the pressure sensor for collecting the gas pressure of the diaphragm compressor and the flow sensor for collecting the gas flow;

[0147] Acquire the operating data of the diaphragm compressor, the gas pressure data displayed by the pressure sensor, and the gas flow data displayed by the flow sensor.

[0148] Furthermore, the data comparison result obtaining module 902 is also specifically used for:

[0149] Obtaining gas pressure level data, gas flow level data, diaphragm compressor load level data, and diaphragm compressor motor speed level data;

[0150] The preset working condition data of the diaphragm compressor is obtained according to each gas pressure level data, each gas flow level data, each load level data of the diaphragm compressor and each motor speed level data of the diaphragm compressor.

[0151] Optionally, the preset operating condition data includes any one of low-pressure operating condition data, medium-pressure operating condition data or high-pressure operating condition data;

[0152] Among them, the low-pressure working condition data refers to the data when the gas pressure level is low, the gas flow level is low, the diaphragm compressor load level is high, and the diaphragm compressor motor speed level is high;

[0153] The medium-pressure working condition data refers to the data when the gas pressure level is medium, the gas flow level is medium, the diaphragm compressor load level is medium, and the diaphragm compressor motor speed level is medium;

[0154] The high-pressure operating condition data refers to the data when the gas pressure level is high, the gas flow level is high, the diaphragm compressor load level is low, and the diaphragm compressor motor speed level is low.

[0155] Furthermore, the operating condition adjustment instruction generating module 903 is also specifically used for:

[0156] If the preset working condition data is high-pressure working condition data, and the current working condition data is low-pressure working condition data or medium-pressure working condition data, a working condition adjustment instruction for switching the working condition to medium pressure or high pressure is generated;

[0157] If the preset working condition data is medium pressure working condition data, and the current working condition data is high pressure working condition data, an adjustment instruction for switching the working condition to high pressure is generated;

[0158] If the preset working condition data is medium-pressure working condition data, and the current working condition data is low-pressure working condition data, an adjustment instruction for switching the working condition to low pressure is generated;

[0159] If the preset operating condition data is low-pressure operating condition data, and the current operating condition data is medium-pressure operating condition data or high-pressure operating condition data, an adjustment instruction for switching the operating condition to medium pressure or high pressure is generated.

[0160] Furthermore, the motor speed control module 904 is also specifically used for:

[0161] If the preset working condition data is high-voltage working condition data, a motor speed control instruction for increasing the motor speed is generated according to the working condition adjustment instruction;

[0162] If the preset working condition data is low-voltage working condition data, a motor speed control instruction for reducing the motor speed is generated according to the working condition adjustment instruction;

[0163] If the preset working condition data is medium-voltage working condition data, and the current working condition data is low-voltage working condition data, the working condition adjustment instruction generates a motor speed control instruction for increasing the motor speed;

[0164] If the preset operating condition data is medium-pressure operating condition data, and the current operating condition data is high-pressure operating condition data, the operating condition adjustment instruction generates a motor speed control instruction for reducing the motor speed.

[0165] Furthermore, the motor speed control module 904 is also specifically used for:

[0166] Repeatedly collect current operating condition data to generate operating condition adjustment instructions based on preset operating condition data to control the motor speed in real time.

[0167] Fig.10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Fig.10 As shown, the electronic device 100 includes:

[0168] The electronic device 100 may include a processor 1001 with one or more processing cores, a memory 1002 with one or more computer-readable storage media, a communication component 1003 and other components. The processor 1001, the memory 1002 and the communication component 1003 are connected via a bus 1004.

[0169] In a specific implementation process, at least one processor 1001 executes the computer execution instructions stored in the memory 1002, so that at least one processor 1001 executes the control method of the diaphragm compressor as described above.

[0170] The specific implementation process of the processor 1001 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0171] In the above Fig.10In the illustrated embodiment, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method in accordance with the working conditions of the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0172] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0173] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0174] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0175] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0176] To this end, an embodiment of the present application provides a computer-readable storage medium, in which a plurality of instructions are stored. The instructions can be loaded by a processor to execute the steps in any one of the control methods of the diaphragm compressor provided in the embodiment of the present application.

[0177] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0178] Since the instructions stored in the storage medium can execute the steps in any one of the diaphragm compressor control methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any one of the diaphragm compressor control methods provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0179] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention as described herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art not described herein. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0180] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A control method for a diaphragm compressor, characterized in that: include: Acquire current operating data of the diaphragm compressor, wherein the operating data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data; Comparing the current working condition data with preset working condition data to obtain a data comparison result, wherein the preset working condition data is a required range for gas pressure data, gas flow data, load data, and motor speed data; If the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, a working condition adjustment instruction is generated, and the working condition adjustment instruction is used to adjust the motor speed; A motor speed control instruction is generated according to the working condition adjustment instruction, and the motor speed of the diaphragm compressor is controlled according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

2. The method according to claim 1, characterized in that The obtaining of the current operating condition data of the diaphragm compressor includes: Controlling the start of the diaphragm compressor, and turning on a pressure sensor for collecting gas pressure of the diaphragm compressor and a flow sensor for collecting gas flow; The operating data of the diaphragm compressor, the gas pressure data displayed by the pressure sensor, and the gas flow data displayed by the flow sensor are acquired.

3. The method according to claim 1, characterized in that Before comparing the current operating condition data with the preset operating condition data to obtain a data comparison result, the method further includes: Obtaining gas pressure level data, gas flow level data, diaphragm compressor load level data, and diaphragm compressor motor speed level data; The preset working condition data of the diaphragm compressor is obtained according to each gas pressure level data, each gas flow level data, each load level data of the diaphragm compressor and each motor speed level data of the diaphragm compressor.

4. The method according to any one of claims 1 to 3, characterized in that: The preset operating condition data includes any one of low-pressure operating condition data, medium-pressure operating condition data or high-pressure operating condition data; The low-pressure working condition data refers to the data when the gas pressure level is low, the gas flow level is low, the diaphragm compressor load level is high, and the diaphragm compressor motor speed level is high; The medium-pressure working condition data refers to data when the gas pressure level is medium, the gas flow level is medium, the diaphragm compressor load level is medium, and the diaphragm compressor motor speed level is medium; The high-pressure operating condition data refers to data when the gas pressure level is high, the gas flow level is high, the diaphragm compressor load level is low, and the diaphragm compressor motor speed level is low.

5. The method according to any one of claims 1 to 3, characterized in that: If the data comparison result indicates that the current operating condition data does not meet the preset operating condition data, a working condition adjustment instruction is generated, including: If the preset working condition data is high-pressure working condition data, and the current working condition data is low-pressure working condition data or medium-pressure working condition data, then a working condition adjustment instruction for switching the working condition to medium pressure or high pressure is generated; If the preset working condition data is medium pressure working condition data, and the current working condition data is high pressure working condition data, an adjustment instruction for switching the working condition to high pressure is generated; If the preset working condition data is medium-pressure working condition data, and the current working condition data is low-pressure working condition data, an adjustment instruction for switching the working condition to low pressure is generated; If the preset operating condition data is low-pressure operating condition data, and the current operating condition data is medium-pressure operating condition data or high-pressure operating condition data, an adjustment instruction for switching the operating condition to medium pressure or high pressure is generated.

6. The method according to any one of claims 1 to 3, characterized in that: Generating a motor speed control instruction according to the working condition adjustment instruction includes: If the preset working condition data is high-voltage working condition data, generating the motor speed control instruction for increasing the motor speed according to the working condition adjustment instruction; If the preset working condition data is low-voltage working condition data, generating the motor speed control instruction for reducing the motor speed according to the working condition adjustment instruction; If the preset working condition data is medium-voltage working condition data, and the current working condition data is low-voltage working condition data, the working condition adjustment instruction generates the motor speed control instruction for increasing the motor speed; If the preset operating condition data is medium-pressure operating condition data, and the current operating condition data is high-pressure operating condition data, the operating condition adjustment instruction generates the motor speed control instruction for reducing the motor speed.

7. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: The current operating condition data is repeatedly collected to generate an operating condition adjustment instruction according to the preset operating condition data to control the motor speed in real time.

8. A control device for a diaphragm compressor, characterized in that: include: A working condition data acquisition module, used to acquire current working condition data of the diaphragm compressor, wherein the working condition data includes gas pressure data, gas flow data, load data of the diaphragm compressor and motor speed data; A data comparison result obtaining module is used to compare the current working condition data with the preset working condition data to obtain a data comparison result, wherein the preset working condition data is a required range for gas pressure data, gas flow data, load data and motor speed data; A working condition adjustment instruction generating module, used for generating a working condition adjustment instruction if the data comparison result indicates that the current working condition data does not meet the preset working condition data, wherein the working condition adjustment instruction is used for adjusting the motor speed; The motor speed control module is used to generate a motor speed control instruction according to the working condition adjustment instruction, and control the motor speed of the diaphragm compressor according to the motor speed control instruction, so that the working condition data of the diaphragm compressor meets the preset working condition data.

9. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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