Operation control method, device, equipment and storage medium for variable frequency pneumatic equipment

Abstract

This specification relates to the field of compressor technology and provides a method for controlling the operation of a variable frequency pneumatic device. The method includes: acquiring the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic device; determining multiple frequency intervals, including an opening buffer interval and a frequency maintenance interval, based on a preset critical frequency margin and the current estimated surge frequency; the preset critical frequency margin is used to at least limit the range of the opening buffer interval and the frequency maintenance interval; the opening buffer interval is larger than the frequency maintenance interval; the control strategy corresponding to the opening buffer interval is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency; the control strategy corresponding to the frequency maintenance interval is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve; and controlling and adjusting the variable frequency pneumatic device according to the control strategy corresponding to the frequency interval matching the current operating frequency. In this way, the air loss can be reduced while improving the operational stability.

Description

Technical Field

[0001] The embodiments described in this specification pertain to the field of pneumatic equipment technology, specifically relating to an operation control method, apparatus, device, and storage medium for variable frequency pneumatic equipment. Background Technology

[0002] Pneumatic equipment is a widely used general-purpose mechanical equipment in industrial production and is one of the main energy-consuming devices in industrial production. The stability of the pneumatic equipment control system is directly related to the energy consumption cost in industrial production. Therefore, energy saving and consumption reduction of pneumatic equipment is also a major issue faced in industrial production.

[0003] In related technologies, variable frequency pneumatic equipment is usually used for the design of control systems. For example, when the control frequency of the pneumatic equipment is close to the surge frequency of the pneumatic equipment, the regulating valve is directly opened to reduce the air supply pressure and surge frequency. At this time, due to the decrease in surge frequency, the regulating valve will be closed again to increase the air supply pressure, resulting in frequent opening and closing of the regulating valve. The operation stability of the variable frequency pneumatic equipment is low, and due to the frequent opening and closing of the regulating valve, the energy consumption or air loss of the variable frequency pneumatic equipment is high.

[0004] Therefore, there is an urgent need to provide an operation control method for variable frequency pneumatic equipment to improve the operational stability of the equipment while reducing air loss. Summary of the Invention

[0005] In view of this, various embodiments of this specification aim to provide an operation control method, apparatus, device, and storage medium for variable frequency pneumatic equipment, so as to improve the operational stability of variable frequency pneumatic equipment while reducing air loss.

[0006] This specification provides an operation control method for a variable frequency pneumatic device, the variable frequency pneumatic device including a regulating valve; the method includes: acquiring the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic device, wherein the current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic device is expected to trigger a surge condition; determining multiple frequency intervals based on a preset critical frequency margin and the current estimated surge frequency, wherein each of the multiple frequency intervals corresponds to a control strategy for the variable frequency pneumatic device, the multiple frequency intervals including an opening buffer interval and a frequency maintenance interval, and the preset critical frequency margin... The quantity is used to at least define the range of the opening buffer zone and the frequency maintenance interval. The opening buffer zone is larger than the frequency maintenance interval. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance interval is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve. Based on the matching relationship between the current operating frequency and the multiple frequency intervals, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval that matches the current operating frequency.

[0007] In some implementations, determining multiple frequency intervals based on a preset critical frequency margin and the currently estimated surge frequency includes: obtaining an adjustable coefficient, wherein the adjustable coefficient is used to define the range between the opening buffer and the frequency maintenance interval, and the adjustable coefficient is greater than or equal to 0 and less than or equal to 1; determining a first product based on the preset critical frequency margin and the adjustable coefficient; determining a first sum based on the currently estimated surge frequency and the first product; determining a second sum based on the currently estimated surge frequency and the preset critical frequency margin; determining the range between the opening buffer based on the first sum and the second sum; and determining the range of the frequency maintenance interval based on the first sum and the currently estimated surge frequency.

[0008] In some embodiments, the plurality of frequency intervals further includes a high-frequency interval, wherein the high-frequency interval is larger than the opening buffer interval; the step of determining the plurality of frequency intervals based on the preset critical frequency margin and the current estimated surge frequency further includes: determining the range of the high-frequency interval according to the second sum value.

[0009] In some embodiments, controlling and adjusting the variable frequency pneumatic device according to the control strategy corresponding to the frequency range that matches the current operating frequency includes: when the current operating frequency is in the high frequency range, if the opening of the regulating valve is greater than 0, then reducing the opening of the regulating valve according to the set opening adjustment speed; otherwise, adjusting the frequency of the current operating frequency.

[0010] In some embodiments, controlling and adjusting the variable frequency pneumatic device according to the control strategy corresponding to the frequency range that matches the current operating frequency includes: when the current operating frequency is within the frequency maintenance range, if the opening of the regulating valve is less than 100%, increasing the opening of the regulating valve according to the set opening adjustment speed.

[0011] In some embodiments, the plurality of frequency ranges further includes a low-frequency range, wherein the low-frequency range is smaller than the frequency maintenance range, and the low-frequency range is determined based on the currently estimated surge frequency; the control and adjustment of the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range matching the current operating frequency includes: when the current operating frequency is in the low-frequency range, maintaining the current operating frequency unchanged and controlling the opening of the regulating valve to 100%.

[0012] In some embodiments, the current estimated surge frequency is determined based on the current pressure ratio of the variable frequency pneumatic device, which is the ratio of the current exhaust pressure to the intake pressure of the variable frequency pneumatic device; the frequency adjustment and the opening adjustment are based on the current output pressure and the target output pressure of the pneumatic device, or the frequency adjustment and the opening adjustment are based on the current air volume and the target air volume of the pneumatic device.

[0013] This specification provides an operation control device for a variable frequency pneumatic device, the variable frequency pneumatic device including a regulating valve; the device includes: a data acquisition module, used to acquire the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic device, wherein the current estimated surge frequency represents the currently estimated operating frequency at which the variable frequency pneumatic device triggers a surge condition; and an interval determination module, used to determine multiple frequency intervals based on a preset critical frequency margin and the current estimated surge frequency, wherein each of the multiple frequency intervals corresponds to a control strategy for the variable frequency pneumatic device, the multiple frequency intervals including an opening buffer interval and a frequency maintenance interval, and the preset critical frequency margin... The frequency margin is used to at least define the range of the opening buffer zone and the frequency maintenance interval. The opening buffer zone is larger than the frequency maintenance interval. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance interval is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve. The operation control module is used to control and adjust the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency interval that matches the current operating frequency, based on the matching relationship between the current operating frequency and the multiple frequency intervals.

[0014] This specification provides a computer device including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the operation control method described in any of the above embodiments.

[0015] This specification provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the operation control method described in any of the above embodiments.

[0016] In the various embodiments provided in this specification, the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic device are obtained. Then, based on the preset critical frequency margin and the current estimated surge frequency, multiple frequency ranges are determined. Each of these frequency ranges corresponds to a control strategy for the variable frequency pneumatic device. The multiple frequency ranges include an opening buffer zone and a frequency maintenance zone. The preset critical frequency margin is used to at least limit the range of the opening buffer zone and the frequency maintenance zone, and the opening buffer zone is larger than the frequency maintenance zone. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve. Then, according to the matching relationship between the current operating frequency and the multiple frequency ranges, the variable frequency pneumatic device is controlled and adjusted according to the control strategy corresponding to the frequency range that matches the current operating frequency. In this way, the air volume loss can be reduced while improving the operating stability of the variable frequency pneumatic device. Attached Figure Description

[0017] Figure 1 A flowchart illustrating the operation control method provided in the embodiments of this specification;

[0018] Figure 2 A flowchart illustrating the operation control method provided in the embodiments of this specification;

[0019] Figure 3 A schematic diagram of the operation control device provided for the embodiments of this specification;

[0020] Figure 4 A schematic diagram of a computer device provided for an embodiment of this specification. Detailed Implementation

[0021] To enable those skilled in the art to better understand the solutions described in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0022] In related technologies, pneumatic equipment is usually designed using frequency conversion control. For example, when the pneumatic equipment is running at low load, when the control frequency of the pneumatic equipment is close to the surge frequency of the pneumatic equipment, the regulating valve is directly opened to adjust the internal pressure of the pneumatic equipment, so as to reduce the air supply pressure and surge frequency. At this time, since the surge frequency is reduced, the regulating valve will be closed to increase the air supply pressure. This will cause the regulating valve to open and close frequently, generating noise pollution and reducing the service life of the regulating valve. At the same time, the frequent opening and closing of the regulating valve also makes the operation stability of the frequency conversion pneumatic equipment lower, and the energy consumption and air volume loss are more serious.

[0023] This specification provides a scenario example of an operation control method for a variable frequency pneumatic device. In this scenario example, the pneumatic device can be a mechanical device that uses compressed gas or steam as a power source, or in other words, a mechanical device that uses air pressure energy to compress and depressurize gas, converting kinetic energy into heat energy and mechanical energy. Exemplarily, the variable frequency pneumatic device is a pneumatic device capable of variable frequency adjustment. As an example, the variable frequency pneumatic device can be a centrifugal variable frequency pneumatic device.

[0024] Variable frequency pneumatic equipment may include a regulating valve, which can be used to adjust the air volume, supply pressure, surge frequency, etc. of the variable frequency pneumatic equipment. For example, the regulating valve may include a pressure relief valve, that is, it can control the operation of pneumatic equipment with both pressure relief valve and variable frequency control. As an example, the variable frequency pneumatic equipment may be a variable frequency air compressor or a compressor.

[0025] In some scenario examples, the variable frequency pneumatic device can be any device capable of gas compression, such as a centrifuge or centrifugal blower. Exemplarily, the regulating valve includes a hot gas bypass valve or a thermal bypass valve. That is, the operation of a centrifugal blower equipped with both a hot gas bypass valve or a thermal bypass valve and variable frequency dual regulation can be controlled.

[0026] This specification provides an operation control method for variable frequency pneumatic equipment. Please refer to [link / reference]. Figure 1 , Figure 1This is a flowchart illustrating an operation control method for a variable frequency pneumatic device provided in this embodiment. This embodiment provides the method operation steps shown in the flowchart, but based on conventional or non-creative labor, more or fewer operation steps may be included. The order of steps listed in this embodiment is merely one possible execution order among many, and does not represent the only possible execution order. In actual system or server product execution, the method can be executed sequentially as shown in the embodiment or in parallel (e.g., in a parallel processor or multi-threaded processing environment). This operation control method can be applied to variable frequency pneumatic devices, specifically as follows... Figure 1 As shown, the operation control method may include the following steps.

[0027] Step S110: Obtain the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment, wherein the current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic equipment triggers surge condition.

[0028] The operating frequency of the variable frequency pneumatic equipment, also known as its control frequency, and its current operating frequency, can refer to the operating frequency or control frequency of the equipment at the current moment. The estimated surge frequency can be estimated and determined based on the surge condition triggering of the variable frequency pneumatic equipment at the current moment.

[0029] Specifically, during the operation of the variable frequency pneumatic equipment, the current operating frequency of the equipment can be monitored in real time, and the current estimated surge frequency can be predicted in real time. This allows for subsequent operational control of the equipment based on the current operating frequency and the current estimated surge frequency. The operation process of the variable frequency pneumatic equipment can include a loading process and an unloading process. The loading process involves increasing the supply air pressure, and the unloading process involves decreasing the supply air pressure. For example, the increase or decrease in supply air pressure can be determined by adjusting the pressure ratio of the variable frequency pneumatic equipment, where the pressure ratio is the ratio of exhaust pressure to intake pressure.

[0030] For example, the current estimated surge frequency can be determined based on the current pressure ratio of the variable frequency pneumatic device. Here, the current pressure ratio is the ratio of the current exhaust pressure to the current intake pressure of the variable frequency pneumatic device.

[0031] Step S120: Based on the preset critical frequency margin and the current estimated surge frequency, determine multiple frequency ranges. Each frequency range corresponds to a control strategy for the variable frequency pneumatic equipment. The multiple frequency ranges include an opening buffer zone and a frequency maintenance zone. The preset critical frequency margin is used to at least limit the range of the opening buffer zone and the frequency maintenance zone. The opening buffer zone is larger than the frequency maintenance zone. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve.

[0032] Among them, the multiple frequency intervals are continuous and non-overlapping, and the opening buffers in the multiple frequency intervals are continuous with the frequency maintenance intervals.

[0033] Specifically, the opening buffer zone and frequency maintenance interval can be determined based on a preset critical frequency margin and the currently estimated surge frequency. The opening buffer zone is larger than the frequency maintenance interval, and the frequency maintenance interval is greater than or equal to the currently estimated surge frequency. For example, both the opening buffer zone and the frequency maintenance interval determined based on the preset critical frequency margin and the currently estimated surge frequency are close to the currently estimated surge frequency, and the frequency maintenance interval is closer to the currently estimated surge frequency than the opening buffer zone.

[0034] Specifically, the control strategy for variable frequency pneumatic equipment can refer to a dual-regulation operation control strategy that involves both frequency conversion control and opening adjustment of the regulating valves within the variable frequency pneumatic equipment.

[0035] For example, after determining the opening buffer zone and the frequency maintenance range, the control strategy corresponding to the opening buffer zone can be set to "maintain the opening of the regulating valve unchanged and adjust the current operating frequency," and the control strategy corresponding to the frequency maintenance range can be set to "maintain the current operating frequency unchanged and adjust the opening of the regulating valve." This allows for the adoption of appropriate control strategies for operation control during the operation of the variable frequency pneumatic equipment. Frequency adjustment can be an increase or decrease in the operating frequency, and opening adjustment can be a decrease or increase in the regulating valve. Opening adjustment can also be the opening or closing of the regulating valve. Specifically, opening adjustment and / or frequency adjustment can be performed according to the loading or unloading process of the variable frequency pneumatic equipment.

[0036] Step S130: Based on the matching relationship between the current operating frequency and multiple frequency ranges, control and adjust the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency.

[0037] In some cases, surge in variable frequency pneumatic equipment is typically triggered under low load conditions. In other words, surge usually occurs when the equipment is under low load. Therefore, when the equipment is currently under low load, its current operating frequency is close to the estimated surge frequency. In this situation, the opening of the regulating valve can be adjusted to achieve active anti-surge control of the variable frequency pneumatic equipment.

[0038] Specifically, since each frequency range has its own corresponding control strategy, the current operating frequency can be matched with multiple frequency ranges to determine the target frequency range. The variable frequency pneumatic equipment can then be controlled and regulated according to the control strategy corresponding to the target frequency range. Furthermore, because the opening buffer zone and frequency maintenance zone are continuous under low load conditions, the opening buffer zone is larger than the frequency maintenance zone, and the frequency maintenance zone is greater than or equal to the currently estimated surge frequency, combined with the control strategies corresponding to the opening buffer zone and frequency maintenance zone, a buffer zone can be added to the valve opening adjustment during the loading or unloading process of the variable frequency pneumatic equipment. This achieves buffered valve opening adjustment, which can prevent frequent valve switching to some extent. Moreover, through the respective control strategies of the opening buffer zone and frequency maintenance zone, optimized control of the variable frequency and valve opening can be achieved. Thus, the operational stability of the variable frequency pneumatic equipment can be improved while reducing air loss.

[0039] In some implementations, determining multiple frequency ranges based on a preset critical frequency margin and the current estimated surge frequency may include the following steps S210-S260.

[0040] Step S210: Obtain the adjustable coefficient, wherein the adjustable coefficient is used to limit the range between the opening buffer and the frequency maintenance interval, and the adjustable coefficient is greater than or equal to 0 and less than or equal to 1.

[0041] In some cases, in order to flexibly adjust the range between the opening buffer zones and enable flexible opening buffer control of variable frequency pneumatic equipment under low load conditions, adjustments can be made according to the adjustable coefficient.

[0042] For example, since the opening buffer is continuous with the frequency maintenance interval, the range of the frequency maintenance interval can also be limited by limiting the range of the opening buffer through an adjustable coefficient.

[0043] The adjustable coefficient ranges from [0%, 100%].

[0044] Step S220: Determine the first product based on the preset critical frequency margin and the adjustable coefficient.

[0045] Step S230: Determine the first sum based on the current estimated surge frequency and the first product.

[0046] Step S240: Determine the second sum based on the current estimated surge frequency and the preset critical frequency margin.

[0047] Step S250: Determine the range between the opening buffers based on the first sum and the second sum;

[0048] Step S260: Determine the range of the frequency maintenance interval based on the first sum and the current estimated surge frequency.

[0049] Specifically, the frequency maintenance interval can be: (Fnsur, Fnsur+FYL*PCFYL], and the opening buffer interval can be: (Fnsur+FYL*PCFYL, Fnsur+FYL).

[0050] Where Fnsur represents the current estimated surge frequency, FYL represents the preset critical frequency margin, and PCFYL represents the adjustable coefficient.

[0051] Where FYL*PCFYL represents the first product, Fnsur+FYL*PCFYL represents the first sum, and Fnsur+FYL represents the second sum.

[0052] For example, during the loading or unloading process of the variable frequency pneumatic equipment, it can be determined whether the current operating frequency is within the opening buffer zone. If the current operating frequency is within the opening buffer zone, the opening of the regulating valve is kept constant and the current operating frequency is adjusted. If the current operating frequency is within the frequency maintenance range, the current operating frequency is kept constant and the opening of the regulating valve is adjusted.

[0053] By flexibly setting the opening buffer zone, during loading, when the operating frequency of the variable frequency pneumatic equipment passes through the opening buffer zone, the adjustment action of the regulating valve can be reduced. This is especially true for variable frequency pneumatic equipment under low load conditions, where the output pressure or air volume can be stabilized by increasing the operating frequency. During unloading, when the operating frequency of the variable frequency pneumatic equipment passes through the opening buffer zone, the output pressure or air volume can be stabilized by decreasing the operating frequency under low load conditions. During loading or unloading, when the variable frequency pneumatic equipment passes through the frequency maintenance range, variable frequency regulation is used to stabilize the output pressure or air volume. In this way, up to the current estimated surge frequency (the surge protection line), variable frequency regulation can be used entirely for lossless air volume adjustment, and after the surge protection line, air volume adjustment with air volume loss can be achieved. Overall, it can achieve full air volume range adjustment from 0% to 100% of the maximum air volume. Simultaneously, it can achieve stable frequency regulation control, reducing the instability and air volume loss caused by frequent adjustment or opening and closing of the regulating valve.

[0054] In some implementations, the multiple frequency ranges may also include a high-frequency range, wherein the high-frequency range is larger than the opening buffer zone.

[0055] In this embodiment, multiple frequency ranges are determined based on a preset critical frequency margin and the current estimated surge frequency. It may also include determining the range of the high-frequency range based on a second sum.

[0056] For example, the high-frequency range can refer to the frequency range greater than Fnsur+FYL.

[0057] In this embodiment, controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency may include: when the current operating frequency is in the high frequency range, if the opening of the regulating valve is greater than 0, then the opening of the regulating valve is reduced according to the set opening adjustment speed; otherwise, the current operating frequency is adjusted.

[0058] Specifically, during the loading or unloading process of the variable frequency pneumatic equipment, it can be determined whether the current operating frequency is in the high frequency range. If the current operating frequency is in the high frequency range, it can be determined whether the opening of the regulating valve is greater than 0. If the opening of the regulating valve is greater than 0, the opening of the regulating valve is reduced according to the set opening speed; otherwise, the current operating frequency is adjusted.

[0059] In some implementations, controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency may include: when the current operating frequency is in the frequency maintenance range, if the opening of the regulating valve is less than 100%, increasing the opening of the regulating valve according to the set opening adjustment speed.

[0060] Specifically, during the loading or unloading process of the variable frequency pneumatic equipment, it can be determined whether the current working frequency is within the frequency maintenance range. If the current working frequency is within the frequency maintenance range, it can be determined whether the opening of the regulating valve is less than 100%. If the opening of the regulating valve is less than 100%, the opening of the regulating valve is increased according to the set opening speed.

[0061] In some implementations, the multiple frequency ranges may further include a low-frequency range, wherein the low-frequency range is smaller than the frequency sustaining range, and the low-frequency range is determined based on the currently estimated surge frequency.

[0062] For example, the low-frequency range can refer to the frequency range that is less than or equal to Fnsur.

[0063] In this embodiment, controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency may include: when the current operating frequency is in the low frequency range, maintaining the current operating frequency unchanged and controlling the opening of the regulating valve to 100%.

[0064] Specifically, during the loading or unloading process of variable frequency pneumatic equipment, it can be determined whether the current operating frequency is in the low frequency range. If the current operating frequency is in the low frequency range, the current operating frequency is maintained unchanged and the opening of the regulating valve is controlled to 100%, that is, the regulating valve is fully opened.

[0065] In some implementations, frequency regulation and opening regulation can be based on the current output pressure and target output pressure of the pneumatic equipment.

[0066] In some implementations, frequency adjustment and opening adjustment can be based on the current air volume and target air volume of the pneumatic device.

[0067] This specification provides an operation control method for variable frequency pneumatic equipment. Please refer to [link / reference]. Figure 2 The operation control method may include the following steps.

[0068] Step S301: Obtain the current pressure ratio of the variable frequency pneumatic equipment.

[0069] The current pressure ratio of the variable frequency pneumatic equipment refers to the current actual pressure ratio, that is, the ratio of the exhaust pressure to the intake pressure at the current moment.

[0070] Step S302: Determine the current estimated surge frequency based on the current pressure ratio, wherein the current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic equipment triggers surge conditions.

[0071] The current estimated surge frequency, that is, the current estimated critical frequency for surge conditions.

[0072] Step S303: Obtain the current operating frequency.

[0073] Where Fn represents the current operating frequency.

[0074] Step S304: Determine the current operating frequency range.

[0075] Specifically, based on the preset critical frequency margin and the current estimated surge frequency, multiple frequency ranges are determined. Each of these frequency ranges corresponds to a control strategy for the variable frequency pneumatic equipment. The multiple frequency ranges include an opening buffer zone and a frequency maintenance zone. The preset critical frequency margin is used to at least limit the range of the opening buffer zone and the frequency maintenance zone. The opening buffer zone is larger than the frequency maintenance zone. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve.

[0076] Specifically, the frequency maintenance interval can be: (Fnsur, Fnsur+FYL*PCFYL], and the opening buffer interval can be: (Fnsur+FYL*PCFYL, Fnsur+FYL). Here, Fnsur represents the currently estimated surge frequency, FYL represents the preset critical frequency margin, and PCFYL represents the adjustable coefficient. FYL*PCFYL represents the first product, Fnsur+FYL*PCFYL represents the first sum, and Fnsur+FYL represents the second sum.

[0077] Specifically, multiple frequency ranges may include high-frequency ranges, where the high-frequency range is greater than the opening buffer zone. For example, the range of the high-frequency range can be determined based on the second sum value, where the high-frequency range can refer to a frequency range greater than Fnsur + FYL.

[0078] Specifically, the multiple frequency ranges may include a low-frequency range, wherein the low-frequency range is smaller than the frequency sustaining range, and the low-frequency range is determined based on the currently estimated surge frequency. For example, the low-frequency range may refer to the frequency range less than or equal to Fnsur.

[0079] Step S305: If the opening of the regulating valve is greater than 0 when the current operating frequency is in the high frequency range, proceed to step S306; otherwise, proceed to step S307.

[0080] Step S306: Reduce the opening of the regulating valve according to the set opening speed.

[0081] Step S307: Adjust the current operating frequency.

[0082] Frequency adjustment can be based on the current output pressure and target output pressure of the pneumatic equipment, or it can be based on the current air volume and target air volume of the pneumatic equipment.

[0083] Step S308: When the current operating frequency is within the opening buffer zone, maintain the opening of the regulating valve unchanged and adjust the current operating frequency.

[0084] Step S309: When the current operating frequency is within the frequency maintenance range, maintain the current operating frequency unchanged and adjust the opening of the regulating valve.

[0085] For example, if the opening of the regulating valve is less than 100% when the current operating frequency is within the frequency maintenance range, the opening of the regulating valve can be increased according to the set opening adjustment speed.

[0086] The opening adjustment can be based on the current output pressure and target output pressure of the pneumatic equipment, or it can be based on the current air volume and target air volume of the pneumatic equipment.

[0087] Step S310: When the current operating frequency is in the low frequency range, maintain the current operating frequency unchanged and control the opening of the regulating valve to 100%.

[0088] This specification provides an operation control device for variable frequency pneumatic equipment. Please refer to [link / reference]. Figure 3 The operation control device may include: a data acquisition module 410, an interval determination module 420, and an operation control module 430.

[0089] The data acquisition module 410 is used to acquire the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment. The current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic equipment is expected to trigger a surge condition.

[0090] The interval determination module 420 is used to determine multiple frequency intervals based on a preset critical frequency margin and the current estimated surge frequency. Each frequency interval corresponds to a control strategy for the variable frequency pneumatic equipment. The multiple frequency intervals include an opening buffer interval and a frequency maintenance interval. The preset critical frequency margin is used to at least limit the range of the opening buffer interval and the frequency maintenance interval. The opening buffer interval is larger than the frequency maintenance interval. The control strategy corresponding to the opening buffer interval is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance interval is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve.

[0091] The operation control module 410 is used to control and adjust the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency, based on the matching relationship between the current operating frequency and multiple frequency ranges.

[0092] The specific functions and effects of the operation control device for variable frequency pneumatic equipment can be explained by referring to other embodiments in this manual, and will not be repeated here. Each module in the operation control device can be implemented entirely or partially through software, hardware, or a combination thereof. Each module can be embedded in the processor of a computer device in hardware form or independent of it, or it can be stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0093] This specification also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer, causes the computer to perform the operation control method in any of the above embodiments.

[0094] This specification also provides a computer program product containing instructions that, when executed by a computer, cause the computer to perform the operation control method in any of the above embodiments.

[0095] This specification also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the operation control method described in the above embodiments.

[0096] In some implementations, please refer to Figure 4 The computer device can be a terminal, and its internal structure diagram can be as follows: Figure 4 As shown. The computer device includes a processor, memory, and a communication interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a control method.

[0097] It is understood that the specific examples in this document are only intended to help those skilled in the art better understand the embodiments described herein, and are not intended to limit the scope of the invention.

[0098] It is understood that in the various embodiments described in this specification, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments described in this specification.

[0099] It is understood that the various implementation methods described in this specification can be implemented individually or in combination, and the implementation methods in this specification are not limited in this respect.

[0100] Unless otherwise stated, all technical and scientific terms used in the embodiments of this specification have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this specification. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in the embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0101] It is understood that the processor in the embodiments of this specification can be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this specification. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this specification can be directly implemented by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above methods.

[0102] It is understood that the memory in the embodiments of this specification may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may be random access memory (RAM). It should be noted that the memory in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0103] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this specification.

[0104] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0105] The above description is merely a specific embodiment of this specification, but the scope of protection of this invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this specification should be included within the scope of protection of this specification. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A method for controlling the operation of a variable frequency pneumatic device, characterized in that, The variable frequency pneumatic device includes a regulating valve; the method includes: The current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment are obtained, wherein the current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic equipment triggers a surge condition. Based on a preset critical frequency margin and the current estimated surge frequency, multiple frequency ranges are determined. Each of these frequency ranges corresponds to a control strategy for the variable frequency pneumatic device. The multiple frequency ranges include an opening buffer zone and a frequency maintenance zone. The preset critical frequency margin is used to at least limit the range of the opening buffer zone and the frequency maintenance zone. The opening buffer zone is larger than the frequency maintenance zone. The control strategy corresponding to the opening buffer zone is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve. Based on the matching relationship between the current operating frequency and the multiple frequency intervals, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval that matches the current operating frequency.

2. The method according to claim 1, characterized in that, The determination of multiple frequency ranges based on the preset critical frequency margin and the current estimated surge frequency includes: Obtain an adjustable coefficient, wherein the adjustable coefficient is used to limit the range between the opening buffer and the frequency maintenance interval, and the adjustable coefficient is greater than or equal to 0 and less than or equal to 1; The first product is determined based on the preset critical frequency margin and the adjustable coefficient; The first sum is determined based on the currently estimated surge frequency and the first product; The second sum is determined based on the current estimated surge frequency and the preset critical frequency margin. The range between the opening buffers is determined based on the first sum and the second sum. The range of the frequency maintenance interval is determined based on the first sum and the current estimated surge frequency.

3. The method according to claim 2, characterized in that, The plurality of frequency ranges also includes a high-frequency range, wherein the high-frequency range is larger than the opening buffer interval; The step of determining multiple frequency ranges based on a preset critical frequency margin and the current estimated surge frequency further includes: determining the range of the high-frequency range based on the second sum value.

4. The method according to claim 3, characterized in that, The control and adjustment of the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range matching the current operating frequency includes: When the current operating frequency is in the high-frequency range, if the opening of the regulating valve is greater than 0, the opening of the regulating valve is reduced according to the set opening adjustment speed; otherwise, the current operating frequency is adjusted.

5. The method according to claim 1, characterized in that, The control and adjustment of the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range matching the current operating frequency includes: If the opening of the regulating valve is less than 100% when the current operating frequency is within the frequency maintenance range, the opening of the regulating valve is increased according to the set opening adjustment speed.

6. The method according to claim 1, characterized in that, The plurality of frequency ranges also includes a low-frequency range, wherein the low-frequency range is smaller than the frequency maintenance range, and the low-frequency range is determined based on the currently estimated surge frequency; The control and adjustment of the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range matching the current operating frequency includes: When the current operating frequency is in the low frequency range, the current operating frequency is maintained unchanged and the opening of the regulating valve is controlled to 100%.

7. The method according to claim 1, characterized in that, The current estimated surge frequency is determined based on the current pressure ratio of the variable frequency pneumatic device, which is the ratio of the current exhaust pressure to the current intake pressure of the variable frequency pneumatic device. The frequency adjustment and the opening adjustment are based on the current output pressure and the target output pressure of the pneumatic device, or the frequency adjustment and the opening adjustment are based on the current air volume and the target air volume of the pneumatic device.

8. A control device for the operation of a variable frequency pneumatic device, characterized in that, The variable frequency pneumatic equipment includes a regulating valve; the device includes: The data acquisition module is used to acquire the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment, wherein the current estimated surge frequency represents the operating frequency at which the variable frequency pneumatic equipment triggers a surge condition. The interval determination module is used to determine multiple frequency intervals based on a preset critical frequency margin and the current estimated surge frequency. Each of the multiple frequency intervals corresponds to a control strategy of the variable frequency pneumatic device. The multiple frequency intervals include an opening buffer interval and a frequency maintenance interval. The preset critical frequency margin is used to at least limit the range of the opening buffer interval and the frequency maintenance interval. The opening buffer interval is larger than the frequency maintenance interval. The control strategy corresponding to the opening buffer interval is to maintain the opening of the regulating valve unchanged and adjust the current operating frequency. The control strategy corresponding to the frequency maintenance interval is to maintain the current operating frequency unchanged and adjust the opening of the regulating valve. The operation control module is used to control and adjust the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency range that matches the current operating frequency, based on the matching relationship between the current operating frequency and the multiple frequency ranges.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the operation control method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the operation control method according to any one of claims 1 to 7.

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