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

Abstract

The embodiment of the invention relates to the technical field of compressors, and provides an operation control method for variable-frequency pneumatic equipment. The method comprises the steps that the current working frequency and the current estimated surge frequency of the variable-frequency pneumatic equipment are obtained; based on a preset critical frequency margin and the current estimated surge frequency, a plurality of frequency intervals including opening buffer areas and frequency maintaining intervals are determined, the preset critical frequency margin is used for at least limiting the ranges of the opening buffer areas and the frequency maintaining intervals, and the opening buffer areas are larger than the frequency maintaining intervals; the corresponding control strategy between the opening buffer regions is to maintain the opening of the regulating valve unchanged and adjust the current working frequency, and the corresponding control strategy between the frequency maintaining regions is to maintain the current working frequency unchanged and adjust the opening of the regulating valve; and the variable-frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval matched with the current working frequency, so that the air flow loss can be reduced while the operation stability is improved.

Description

Technical Field

[0001] The embodiments of the present specification relate to the technical field of pneumatic equipment, and specifically to an operation control method, device, equipment and storage medium for variable frequency pneumatic equipment. Background Art

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

[0003] In the related art, variable frequency pneumatic equipment is usually used to design the control system. 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 the surge frequency. At this time, due to the decrease in the surge frequency, the regulating valve will be closed again to increase the air supply pressure, resulting in frequent switching of the regulating valve. The operating stability of the variable frequency pneumatic equipment is low, and due to the frequent switching of the regulating valve, the energy consumption or gas 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 reduce gas loss while improving the operation stability of the variable frequency pneumatic equipment. Summary of the invention

[0005] In view of this, multiple embodiments of this specification are dedicated to providing an operation control method, device, equipment and storage medium for variable frequency pneumatic equipment, so as to reduce gas loss while improving the operation stability of the variable frequency pneumatic equipment.

[0006] The embodiment of the present specification provides an operation control method for variable frequency pneumatic equipment, wherein the variable frequency pneumatic equipment includes a regulating valve; the method includes: obtaining the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment, wherein the current estimated surge frequency represents the currently estimated operating frequency of the variable frequency pneumatic equipment when the surge condition is triggered; based on a preset critical frequency margin and the current estimated surge frequency, determining a plurality of frequency intervals, wherein each of the plurality of frequency intervals corresponds to a control strategy of the variable frequency pneumatic equipment, the plurality of frequency intervals include an opening buffer zone and a frequency maintenance zone, and the preset critical frequency margin The quantity 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 to adjust the frequency of the current working frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current working frequency unchanged and to adjust the opening of the regulating valve; according to the matching relationship between the current working frequency and the multiple frequency zones, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency zone matching the current working frequency.

[0007] In some embodiments, the determining of multiple frequency intervals based on the preset critical frequency margin and the current estimated surge frequency includes: obtaining an adjustable coefficient, wherein the adjustable coefficient is used to limit the range of the opening buffer zone 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 current estimated surge frequency and the first product; determining a second sum based on the current estimated surge frequency and the preset critical frequency margin; determining the range of the opening buffer zone based on the first sum and the second sum; determining the range of the frequency maintenance interval based on the first sum and the current estimated surge frequency.

[0008] In some embodiments, the multiple frequency intervals also include a high-frequency interval, wherein the high-frequency interval is larger than the opening buffer interval; the multiple frequency intervals are determined based on the preset critical frequency margin and the current estimated surge frequency, and further include: determining the range of the high-frequency interval based on the second sum value.

[0009] In some embodiments, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency range matching the current operating frequency, including: 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 frequency adjusted.

[0010] In some embodiments, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval matching the current operating frequency, including: when the current operating frequency is in the frequency maintenance interval, if the opening of the regulating valve is less than 100%, then the opening of the regulating valve is increased according to the set opening adjustment speed.

[0011] In some embodiments, the multiple frequency intervals also include a low-frequency interval, wherein the low-frequency interval is smaller than the frequency maintenance interval, and the low-frequency interval is determined based on the current estimated surge frequency; the control strategy corresponding to the frequency interval matching the current operating frequency is used to control and adjust the variable frequency pneumatic equipment, including: when the current operating frequency is in the low-frequency interval, 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, and the current pressure ratio 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 performed based on the current output pressure and the target output pressure of the pneumatic device, or the frequency adjustment and the opening adjustment are performed based on the current gas volume and the target gas volume of the pneumatic device.

[0013] The embodiment of the present specification provides an operation control device for variable frequency pneumatic equipment, wherein the variable frequency pneumatic equipment includes 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 equipment, wherein the current estimated surge frequency represents the currently estimated operating frequency of the variable frequency pneumatic equipment when the surge condition is triggered; an interval determination module, used to determine a plurality of frequency intervals based on a preset critical frequency margin and the current estimated surge frequency, wherein the plurality of frequency intervals each correspond to a control strategy of the variable frequency pneumatic equipment, the plurality of frequency intervals include an opening buffer interval and a frequency maintenance interval, the preset critical frequency margin and the current estimated surge frequency The 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 to adjust the frequency of the current operating frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and to adjust the opening of the regulating valve; an operation control module is used to control and adjust the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency zone matching the current operating frequency based on the matching relationship between the current operating frequency and the multiple frequency zones.

[0014] An embodiment of the present specification provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the operation control method described in any of the above embodiments is implemented.

[0015] An embodiment of the present specification provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the operation control method described in any of the above embodiments is implemented.

[0016] In multiple implementations provided in this specification, by obtaining the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic equipment, and then, based on the preset critical frequency margin and the current estimated surge frequency, multiple frequency intervals are determined, and each of the multiple frequency intervals corresponds to a control strategy for the variable frequency pneumatic equipment. The multiple frequency intervals 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 control valve unchanged and adjust the frequency of the current operating frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and adjust the opening of the control valve. Then, according to 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. In this way, the air loss can be reduced while improving the operating stability of the variable frequency pneumatic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flowchart of an operation control method provided in an embodiment of this specification;

[0018] Figure 2 A flowchart of an operation control method provided in an embodiment of this specification;

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

[0020] Figure 4 A schematic diagram of a computer device provided for embodiments of the present specification. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of this specification, the technical solution in the implementation of this specification will be clearly and completely described below in conjunction with the drawings in the implementation of this specification. Obviously, the described implementation is only a part of the implementation of this specification, not all of the implementations. Based on the implementation in this specification, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0022] In the related art, pneumatic equipment is usually designed to adopt variable frequency control regulation. For example, when the pneumatic equipment is running at low load, when the control frequency of the pneumatic equipment is about to approach the surge frequency of the pneumatic equipment, the regulating valve is directly opened to adjust the internal pressure of the pneumatic equipment to reduce the air supply pressure and surge frequency. At this time, due to the reduction in surge frequency, the air supply pressure will be increased by closing the regulating valve. This will cause frequent switching of the regulating valve, generate noise pollution, and reduce the service life of the regulating valve. At the same time, the frequent switching of the regulating valve also makes the operation stability of the variable frequency pneumatic equipment lower, and the energy consumption and gas loss are more serious.

[0023] The embodiments of this specification provide a scenario example of an operation control method of 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, it can be a mechanical device that uses air pressure energy to compress and decompress gas, and converts kinetic energy into heat energy and mechanical energy. Exemplarily, the variable frequency pneumatic device is a pneumatic device that can perform variable frequency regulation. As an example, the variable frequency pneumatic device can be a centrifugal variable frequency pneumatic device.

[0024] The variable frequency pneumatic device may include a regulating valve, which can be used to adjust the gas volume, gas supply pressure, surge frequency, etc. of the variable frequency pneumatic device. Exemplarily, the regulating valve may include a pressure relief valve, that is, the operation of the pneumatic device with a pressure relief valve and variable frequency dual regulation can be controlled. As an example, the variable frequency pneumatic device may be a variable frequency air compressor or a compressor.

[0025] In some scenario examples, the variable frequency pneumatic equipment can be related equipment that can perform gas compression in a broad sense, such as a centrifuge, a centrifugal blower, etc. that can perform gas compression. Exemplarily, the regulating valve includes a hot gas bypass valve or a thermal bypass valve. In other words, the operation of a centrifugal blower with a hot gas bypass valve or a thermal bypass valve and variable frequency dual regulation can be controlled.

[0026] This specification provides a method for controlling the operation of a variable frequency pneumatic device. Figure 1 , Figure 1It is a flow chart of an operation control method of a variable frequency pneumatic device provided by the present embodiment. The present embodiment provides method operation steps as shown in the flow chart, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiment is only one execution method among many step execution sequences, and does not represent the only execution sequence. When the actual system or server product is executed, it can be executed in sequence or in parallel according to the method shown in the embodiment (for example, in a parallel processor or multi-threaded processing environment). The operation control method can be applied to variable frequency pneumatic equipment, specifically Figure 1 As shown, the operation control method may include the following steps.

[0027] Step S110: obtaining the current operating frequency and the current estimated surge frequency of the variable frequency pneumatic device, wherein the current estimated surge frequency represents the current estimated operating frequency of the variable frequency pneumatic device when the surge condition is triggered.

[0028] The operating frequency of the variable frequency pneumatic device, that is, the control frequency of the variable frequency pneumatic device, and the current operating frequency of the variable frequency pneumatic device may refer to the operating frequency or control frequency of the variable frequency pneumatic device at the current moment. The current estimated surge frequency may be determined by estimating the surge condition triggering of the variable frequency pneumatic device at the current moment.

[0029] Specifically, during the operation of the variable frequency pneumatic equipment, the current operating frequency of the variable frequency pneumatic equipment can be monitored in real time, and the current estimated surge frequency at the current moment can be estimated in real time, so that the operation of the variable frequency pneumatic equipment can be controlled based on the current operating frequency and the current estimated surge frequency. Among them, the operation process of the variable frequency pneumatic equipment may include the loading process and the unloading process of the variable frequency pneumatic equipment. The loading process is the process of increasing the air supply pressure of the variable frequency pneumatic equipment, and the unloading process is the process of decreasing the air supply pressure of the variable frequency pneumatic equipment. For example, the increase or decrease of the air supply pressure can be determined by adjusting the pressure ratio of the variable frequency pneumatic equipment, wherein the pressure ratio is the ratio of the exhaust pressure to the intake pressure.

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

[0031] Step S120: Based on the preset critical frequency margin and the current estimated surge frequency, multiple frequency intervals are determined, wherein each of the multiple frequency intervals corresponds to a control strategy of the variable frequency pneumatic equipment, and the multiple frequency intervals 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 control valve unchanged and to adjust the frequency of the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and to adjust the opening of the control valve.

[0032] The multiple frequency intervals are continuous and non-overlapping, and the opening buffer zones and the frequency maintaining zones in the multiple frequency intervals are continuous.

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

[0034] Specifically, the control strategy for the variable frequency pneumatic equipment may refer to an operation control strategy of dual regulation of frequency conversion control regulation of the variable frequency pneumatic equipment and opening regulation of a regulating valve in the variable frequency pneumatic equipment.

[0035] For example, after determining the opening buffer zone and the frequency maintenance zone, the control strategy corresponding to the opening buffer zone can be set to "maintain the opening of the regulating valve unchanged and adjust the frequency of the current working frequency", and the control strategy corresponding to the frequency maintenance zone can be set to "maintain the current working frequency unchanged and adjust the opening of the regulating valve", so that the corresponding control strategy can be adopted to control the operation during the operation of the variable frequency pneumatic equipment. Among them, the frequency adjustment can be an increase or decrease in the working frequency, the opening adjustment can be a decrease or increase in the regulating valve, and the opening adjustment can also be the opening or closing of the regulating valve. Specifically, the opening adjustment and / or frequency adjustment can be performed according to the loading process or unloading process of the variable frequency pneumatic equipment.

[0036] Step S130: According to 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 matching the current operating frequency.

[0037] In some cases, variable frequency pneumatic equipment usually triggers surge under low load conditions, or in other words, when variable frequency pneumatic equipment surges, it is usually in a low load state. Therefore, when the variable frequency pneumatic equipment is currently in a low load state, the current operating frequency of the variable frequency pneumatic equipment is close to the current estimated surge frequency. At this time, the opening of the control valve can be adjusted to achieve active anti-surge control of the variable frequency pneumatic equipment.

[0038] Specifically, since multiple frequency intervals each correspond to a corresponding control strategy, the current operating frequency can be matched with multiple frequency intervals, and the frequency interval that matches the current operating frequency can be used as the target frequency interval, and the variable frequency pneumatic equipment can be controlled and adjusted according to the control strategy corresponding to the target frequency interval. Since the opening buffer zone under low load is continuous with the frequency maintenance zone, the opening buffer zone is greater than the frequency maintenance zone, and the frequency maintenance zone is greater than or equal to the current estimated surge frequency, combined with the control strategies corresponding to the opening buffer zone and the frequency maintenance zone, a buffer zone can be added to the opening adjustment of the control valve during the loading or unloading process of the variable frequency pneumatic equipment to achieve buffered opening adjustment of the control valve, which can prevent the control valve from switching frequently to a certain extent, and through the control strategies of the opening buffer zone and the frequency maintenance zone, the frequency conversion and the control valve opening can be optimized. In this way, the air loss can be reduced while the operating stability of the variable frequency pneumatic equipment is improved.

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

[0040] Step S210: Obtain an adjustable coefficient, wherein the adjustable coefficient is used to limit the range of the opening buffer zone 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 of the opening buffer zone so as to flexibly perform opening buffer control on variable frequency pneumatic equipment under low load conditions, adjustments can be made according to adjustable coefficients that can be set.

[0042] Exemplarily, since the opening buffer zone is continuous with the frequency maintenance zone, the range of the frequency maintenance zone can be limited by limiting the range of the opening buffer zone through the adjustable coefficient.

[0043] The adjustable coefficient value range is [0%, 100%].

[0044] Step S220: determining a first product according to the preset critical frequency margin and the adjustable coefficient.

[0045] Step S230: Determine a first sum value according to the current estimated surge frequency and the first product.

[0046] Step S240: Determine a second sum value according to the current estimated surge frequency and the preset critical frequency margin.

[0047] Step S250: determining the range of the opening buffer zone according to the first sum value and the second sum value;

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

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

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

[0051] Among them, 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 in the opening buffer zone. When the current operating frequency is in the opening buffer zone, the opening of the regulating valve is maintained unchanged and the current operating frequency is adjusted; when the current operating frequency is in the frequency maintenance interval, the current operating frequency is maintained unchanged and the opening of the regulating valve is adjusted.

[0053] By flexibly setting the opening buffer zone, during the loading process, when the working frequency of the variable frequency pneumatic equipment passes through the opening buffer zone, the regulating action of the regulating valve can be reduced, especially for the variable frequency pneumatic equipment under low load state, which can stably control the output pressure or gas volume by increasing the working frequency. During the unloading process, when the working frequency of the variable frequency pneumatic equipment passes through the opening buffer zone, the variable frequency pneumatic equipment under low load state can stably control the output pressure or gas volume by reducing the working frequency. When the variable frequency pneumatic equipment during the loading process or unloading process passes through the frequency maintenance interval, the output pressure or gas volume is stably controlled by frequency conversion regulation. In this way, frequency conversion can be used completely before the surge protection line of the current estimated surge frequency for regulation without gas volume loss, and gas volume regulation with gas volume loss can be achieved after the surge protection line. Overall, the full gas volume range regulation of 0%-100% of the maximum gas volume can be achieved. At the same time, overall, stable control of frequency regulation can be achieved, reducing the instability and gas volume loss caused by frequent adjustment or frequent switching of the regulating valve.

[0054] In some implementations, the plurality of frequency intervals may further include a high frequency interval, wherein the high frequency interval is larger than the opening buffer interval.

[0055] In this embodiment, determining a plurality of frequency intervals based on a preset critical frequency margin and a current estimated surge frequency may further include: determining a range of a high frequency interval according to a second sum value.

[0056] Exemplarily, the high frequency interval may refer to a frequency interval greater than Fnsur+FYL.

[0057] In this embodiment, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency range matching the current operating frequency, which 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. When 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 adjustment speed, otherwise the current operating frequency is adjusted.

[0059] In some embodiments, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval matching the current operating frequency, which may include: when the current operating frequency is in the frequency maintenance interval, if the opening of the regulating valve is less than 100%, then the opening of the regulating valve is increased 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 operating frequency is in the frequency maintenance range. When the current operating frequency is in 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 adjustment speed.

[0061] In some implementations, the plurality of frequency intervals may further include a low frequency interval, wherein the low frequency interval is smaller than the frequency maintaining interval, and the low frequency interval is determined based on a current estimated surge frequency.

[0062] Exemplarily, the low frequency interval may refer to a frequency interval that is less than or equal to Fnsur.

[0063] In this embodiment, the variable frequency pneumatic equipment is controlled and adjusted according to the control strategy corresponding to the frequency interval matching the current operating frequency, which may include: when the current operating frequency is in the low frequency interval, 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 the variable frequency pneumatic equipment, it can be determined whether the current operating frequency is in the low frequency range. 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%, that is, the regulating valve is controlled to be fully open.

[0065] In some implementations, the frequency adjustment and the opening adjustment may be performed based on the current output pressure and the target output pressure of the pneumatic device.

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

[0067] This specification provides a method for controlling the operation of a variable frequency pneumatic device. 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: determining a current estimated surge frequency based on a current pressure ratio, wherein the current estimated surge frequency represents a currently estimated operating frequency of the variable frequency pneumatic equipment when a surge condition is triggered.

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

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

[0073] Wherein, Fn represents the current operating frequency.

[0074] Step S304: Determine the interval in which the current operating frequency is located.

[0075] Specifically, based on the preset critical frequency margin and the current estimated surge frequency, multiple frequency intervals are determined, wherein each of the multiple frequency intervals corresponds to a control strategy for the variable frequency pneumatic equipment, and the multiple frequency intervals 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 control valve unchanged and to adjust the frequency of the current operating frequency. The control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and to adjust the opening of the control 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]. Among them, Fnsur represents the current estimated surge frequency, FYL represents the preset critical frequency margin, and PCFYL represents the adjustable coefficient. Among them, FYL*PCFYL represents the first product, Fnsur+FYL*PCFYL represents the first sum, and Fnsur+FYL represents the second sum.

[0077] Specifically, the multiple frequency intervals may include a high frequency interval, wherein the high frequency interval is larger than the opening buffer interval. Exemplarily, the range of the high frequency interval may be determined according to the second sum value, and the high frequency interval may refer to a frequency interval larger than Fnsur+FYL.

[0078] Specifically, the multiple frequency intervals may include a low frequency interval, wherein the low frequency interval is smaller than the frequency maintenance interval, and the low frequency interval is determined based on the current estimated surge frequency. Exemplarily, the low frequency interval may refer to a frequency interval that is less than or equal to Fnsur.

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

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

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

[0082] The frequency regulation may be performed based on the current output pressure and the target output pressure of the pneumatic device, or may be performed based on the current gas volume and the target gas volume of the pneumatic device.

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

[0084] Step S309: When the current operating frequency is in the frequency maintenance interval, the current operating frequency is maintained unchanged and the opening of the regulating valve is adjusted.

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

[0086] The opening adjustment may be performed based on the current output pressure and the target output pressure of the pneumatic device, or may be performed based on the current gas volume and the target gas volume of the pneumatic device.

[0087] Step S310: 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 be 100%.

[0088] This specification provides an operation control device for variable frequency pneumatic equipment. 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 device, wherein the current estimated surge frequency represents the current estimated operating frequency of the variable frequency pneumatic device when the surge condition is triggered;

[0090] The interval determination module 420 is used to determine a plurality of frequency intervals based on a preset critical frequency margin and a current estimated surge frequency, wherein each of the plurality of frequency intervals corresponds to a control strategy of a variable frequency pneumatic device, the plurality of frequency intervals 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 perform frequency adjustment on the current working frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current working frequency unchanged and perform opening adjustment on 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 matching relationship between the current working frequency and multiple frequency intervals and the control strategy corresponding to the frequency interval matching the current working frequency.

[0092] The specific functions and effects achieved by the operation control device of the variable frequency pneumatic equipment can be explained with reference to other embodiments of this specification, and will not be repeated here. Each module in the operation control device can be implemented in whole or in part by software, hardware, and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0093] The embodiments of the present specification also provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a computer, the computer executes the operation control method in any of the above embodiments.

[0094] The embodiments of this specification also provide a computer program product including instructions, which, when executed by a computer, enables the computer to execute the operation control method in any of the above embodiments.

[0095] The embodiment of the present specification also provides a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the operation control method in the above embodiment is implemented.

[0096] In some embodiments, see Figure 4 The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, and a communication interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, the operation control method is implemented.

[0097] It should be understood that the specific examples herein are only intended to help those skilled in the art to better understand the embodiments of the present specification, rather than to limit the scope of the present invention.

[0098] It can be understood that in the various implementations of this specification, the size of the sequence number of each process does not mean 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 implementation methods of this specification.

[0099] It can be understood that the various embodiments described in this specification can be implemented individually or in combination, and the embodiments of this specification are not limited to this.

[0100] Unless otherwise specified, all technical and scientific terms used in the embodiments of this specification have the same meaning as those generally understood by those skilled in the art of the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. The singular forms of "a", "above", and "the" used in the embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0101] It can be understood that the processor of the embodiment of this specification can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method implementation can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiment of this specification can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of this specification can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0102] It is understood that the memory in the embodiments of this specification may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasablePROM, EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM). It should be noted that the memory of 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 appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this specification.

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

[0105] The above is only a specific implementation of this specification, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this specification, which should be included in the protection scope of this specification. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling the operation of variable frequency pneumatic equipment, characterized in that: The variable frequency pneumatic device includes a regulating valve; the method includes: 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 of the variable frequency pneumatic device when the surge condition is triggered; Based on a preset critical frequency margin and the current estimated surge frequency, a plurality of frequency intervals are determined, wherein each of the plurality of frequency intervals corresponds to a control strategy of the variable frequency pneumatic device, the plurality of frequency intervals 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 perform frequency adjustment on the current operating frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and perform opening adjustment on the opening of the regulating valve; According to 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 matching the current operating frequency.

2. The method according to claim 1, characterized in that The determining of a plurality of frequency intervals based on the preset critical frequency margin and the current estimated surge frequency includes: Acquire an adjustable coefficient, wherein the adjustable coefficient is used to limit the range of the opening buffer zone 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 according to the preset critical frequency margin and the adjustable coefficient; determining a first sum value according to the current estimated surge frequency and the first product; Determining a second sum value according to the current estimated surge frequency and the preset critical frequency margin; Determining a range of the opening buffer zone according to the first sum value and the second sum value; The range of the frequency maintenance interval is determined according to the first sum value and the current estimated surge frequency.

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

4. The method according to claim 3, characterized in that The controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency interval 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 frequency adjusted.

5. The method according to claim 1, characterized in that The controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency interval matching the current operating frequency includes: When the current operating frequency is in the frequency maintaining interval, if the opening of the regulating valve is less than 100%, the opening of the regulating valve is increased according to a set opening adjustment speed.

6. The method according to claim 1, characterized in that The multiple frequency intervals further include a low frequency interval, wherein the low frequency interval is smaller than the frequency maintaining interval, and the low frequency interval is determined based on the current estimated surge frequency; The controlling and adjusting the variable frequency pneumatic equipment according to the control strategy corresponding to the frequency interval 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 be 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, where the current pressure ratio 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 performed based on the current output pressure and the target output pressure of the pneumatic device, or the frequency adjustment and the opening adjustment are performed based on the current gas volume and the target gas volume of the pneumatic device.

8. An operation control device for variable frequency pneumatic equipment, characterized in that: The variable frequency pneumatic equipment includes 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 of the variable frequency pneumatic device when the surge condition is triggered; An interval determination module, for determining a plurality of frequency intervals based on a preset critical frequency margin and the current estimated surge frequency, wherein each of the plurality of frequency intervals corresponds to a control strategy of the variable frequency pneumatic device, the plurality of frequency intervals 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 perform frequency adjustment on the current operating frequency, and the control strategy corresponding to the frequency maintenance zone is to maintain the current operating frequency unchanged and perform opening adjustment on 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 matching the current operating frequency based on the matching relationship between the current operating frequency and the multiple frequency intervals.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the operation control method according to any one of claims 1 to 7 is implemented.

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

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