Control method, device and equipment for pressure release valve of air compressor and storage medium

Abstract

The invention discloses a pressure release valve control method, device and equipment of an air compressor and a storage medium. The pressure release valve control method of the air compressor comprises the steps that the operation frequency of a motor of the air compressor is obtained; and according to the operation frequency of the motor and the pre-acquired surge frequency of the motor, a pressure release valve of the air compressor is controlled to execute opening and closing actions. According to the control method for the pressure release valve of the air compressor in the embodiment of the invention, dynamic adjustment on the opening and closing action of the pressure release valve of the air compressor according to the operation frequency of the motor and the pre-obtained surge frequency of the motor is achieved; according to the pressure release valve control method of the air compressor, the applicability of the air compressor is improved, the application range of the air compressor is expanded, the operation stability of the air compressor is improved, and energy waste and noise pollution are reduced.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment, and specifically to a method, apparatus, device, and storage medium for controlling the pressure relief valve of an air compressor. Background Technology

[0002] An air compressor (or centrifuge) is a widely used general-purpose mechanical device in industry and is one of the main pieces of equipment in a factory. The stability and response speed of the air compressor (or centrifuge) control system are directly related to the overall system stability.

[0003] Air compressors are generally equipped with pressure relief valves, which are used to assist in the system's energy regulation control, anti-surge control, and start-up and shutdown control. In related technologies, in various application scenarios, the pressure relief valve's opening and closing rate is often set to a fixed value, which can easily lead to unstable operation of the air compressor, resulting in energy waste and noise pollution.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a method, apparatus, device, and storage medium for controlling the pressure relief valve of an air compressor, aiming to at least partially solve the technical problem that the pressure relief valve switching rate of air compressors in related technologies uses a fixed value, which easily leads to unstable operation of the air compressor, resulting in energy waste and noise pollution.

[0006] According to one aspect of the embodiments of this application, a method for controlling the pressure relief valve of an air compressor is provided, comprising:

[0007] Obtain the operating frequency of the air compressor motor;

[0008] Based on the operating frequency of the motor and the pre-acquired surge frequency of the motor, the pressure relief valve of the air compressor is controlled to perform switching actions.

[0009] In some embodiments of this application, controlling the pressure relief valve of the air compressor to perform an on / off action based on the operating frequency of the motor and the pre-acquired surge frequency of the motor includes:

[0010] Based on the pre-acquired first relationship, the pressure relief valve of the air compressor is controlled to perform a switching action at a corresponding rate; the first relationship is the correlation between the operating frequency of the motor, the pre-acquired surge frequency of the motor, and the switching action rate of the pressure relief valve of the air compressor.

[0011] In some embodiments of this application, the first relationship is the correlation between a first difference and the switching action rate of the air compressor's pressure relief valve, wherein the first difference is the difference between the operating frequency and the pre-acquired surge frequency.

[0012] In some embodiments of this application, the first relationship includes:

[0013] The closing rate of the pressure relief valve is positively correlated with its opening rate;

[0014] If the first difference is not greater than a preset value, the shutdown rate is positively correlated with the first difference;

[0015] When the first difference is greater than a preset value, the closing rate of the pressure relief valve is a preset constant.

[0016] In some embodiments of this application, the closing rate of the pressure relief valve is positively correlated with the opening rate, including: the closing rate of the pressure relief valve and the opening rate form a linear function with the closing rate as the independent variable and the opening rate as the dependent variable, and the slope of the linear function is positive.

[0017] In some embodiments of this application, the step of having a positive correlation between the shutdown rate and the first difference when the first difference is not greater than a preset value includes:

[0018] If the first difference is not greater than a preset value, the closing rate and the difference constitute a linear function with the closing rate as the dependent variable and the difference as the independent variable, and the slope of the linear function is positive.

[0019] In some embodiments of this application, the step of having a positive correlation between the shutdown rate and the first difference when the first difference is not greater than a preset value includes:

[0020] When the first difference is not greater than a preset value, the closing rate and the first difference constitute a quadratic function with the closing rate as the dependent variable and the first difference as the independent variable, and the coefficient of the quadratic term of the quadratic function is positive, and the coefficient of the linear term of the quadratic function is less than 0.

[0021] In some embodiments of this application, the step of having a positive correlation between the shutdown rate and the first difference when the first difference is not greater than a preset value includes:

[0022] When the first difference is not greater than a preset value, the closing rate and the first difference constitute a first function with the closing rate as the dependent variable and the first difference as the independent variable. The first function is obtained by translating a first inverse proportional function along the positive direction of the vertical axis of the coordinate system by a first positive value, and the proportional coefficient of the first inverse proportional function is less than 0.

[0023] According to another aspect of the embodiments of this application, a pressure relief valve control device for an air compressor is provided, comprising:

[0024] The motor operating frequency acquisition module is used to acquire the operating frequency of the air compressor motor.

[0025] The pressure relief valve control module is used to control the pressure relief valve of the air compressor to perform switching actions based on the operating frequency of the motor and the pre-acquired surge frequency of the motor.

[0026] According to another aspect of the embodiments of this application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the air compressor pressure relief valve control method described in any embodiment of this application.

[0027] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided having a computer program stored thereon, the computer program being executed by a processor to implement the air compressor pressure relief valve control method described in any embodiment of this application.

[0028] In this invention, the operating frequency of the air compressor motor is obtained, and the pressure relief valve of the air compressor is controlled to perform switching actions based on the operating frequency of the motor and the pre-acquired surge frequency of the motor. This achieves dynamic adjustment of the switching action of the air compressor pressure relief valve according to the operating frequency of the motor and the pre-acquired surge frequency of the motor, thereby improving the applicability of the air compressor, expanding the application range of the air compressor, improving the operational stability of the air compressor, and reducing energy waste and noise pollution.

[0029] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, the specific implementation methods of this application are listed below. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a flowchart of a pressure relief valve control method for an air compressor according to an embodiment of this application;

[0032] Figure 2 This is a graph showing the relationship between the first difference and the closing rate of the pressure relief valve in one embodiment of this application.

[0033] Figure 3 This is a graph showing the relationship between the first difference and the closing rate of the pressure relief valve according to another embodiment of this application.

[0034] Figure 4 This is a graph showing the relationship between the first difference and the closing rate of the pressure relief valve according to another embodiment of this application.

[0035] Figure 5 This is a structural block diagram of a pressure relief valve control device for an air compressor according to an embodiment of this application;

[0036] Figure 6 This is a structural block diagram of an electronic device according to an embodiment of this application.

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0043] Centrifugal compressors are a type of turbine compressor. Air compressors are devices used to compress gases, often simply called air compressors.

[0044] In related technologies, using a fixed value for the switching rate of the pressure relief valve in various application scenarios of air compressors can easily lead to unstable operation of the air compressor, resulting in energy waste and noise pollution. For example, if the switching rate is set too high, it may cause excessive pressure fluctuations in the system under adjustable control, resulting in energy waste and noise pollution; if the switching rate is set too low, the pressure relief valve may close too slowly during startup, also leading to energy waste.

[0045] To address the problems existing in related technologies, this application provides a method for controlling the pressure relief valve of an air compressor. The method acquires the operating frequency of the air compressor motor and then controls the air compressor's pressure relief valve to perform an opening and closing action based on the motor's operating frequency and a pre-acquired surge frequency. This achieves dynamic adjustment of the air compressor's pressure relief valve's opening and closing action based on the motor's operating frequency and pre-acquired surge frequency. Compared to related technologies that use a fixed mode to control the air compressor's pressure relief valve opening and closing, this application's method improves the air compressor's applicability, expands its application range, enhances its operational stability, and reduces energy waste and noise pollution.

[0046] The following description, in conjunction with the accompanying drawings, describes a method for controlling the pressure relief valve of an air compressor, a device for controlling the pressure relief valve of an air compressor, an electronic device, and a computer-readable storage medium according to embodiments of this application.

[0047] refer to Figure 1 As shown, one embodiment of this application provides a method for controlling the pressure relief valve of an air compressor, which may include:

[0048] S10. Obtain the operating frequency of the air compressor motor.

[0049] Specifically, a motor frequency detection device can be used to detect the operating frequency of the air compressor motor in real time, thereby obtaining the real-time operating frequency of the air compressor motor.

[0050] S20. Based on the operating frequency of the motor and the pre-acquired surge frequency of the motor, control the pressure relief valve of the air compressor to perform the switching action.

[0051] Surge refers to the periodic oscillation of airflow caused by insufficient flow rate during the operation of an air compressor; it is a vibration under abnormal operating conditions. The surge frequency of the motor refers to the frequency of periodic airflow pulsations generated when surge occurs in the air compressor.

[0052] The pre-acquisition surge frequency of the motor can be obtained by monitoring the fluctuation characteristics of the motor input current to determine the surge and estimate its frequency. Specifically, it includes the following steps:

[0053] First, the peak-to-peak value of the current is detected. During surge, the motor load changes drastically and periodically, causing significant fluctuations in the input current. Three-phase current signals are acquired in real time, and the peak-to-peak value of any phase current is checked to see if it exceeds a preset threshold. This eliminates the need for additional sensors, utilizing the current detection module of the motor control system directly, resulting in a fast response time. Next, the correlation analysis between current and speed fluctuations is performed. Current fluctuations during surge are often accompanied by speed fluctuations. By simultaneously monitoring the peak-to-peak value of the current and the speed fluctuation value (such as the change in rotor speed), surge is confirmed when both exceed the threshold, and the surge frequency is calculated based on the fluctuation period. For example, if the current fluctuation period is 0.2 seconds (i.e., 5Hz), the surge frequency can be determined to be 5Hz.

[0054] In some examples, the pre-acquired surge frequency of the motor can also be obtained by identifying characteristic frequencies in advance based on vibration spectrum analysis. Surge induces mechanical vibration, and the characteristic peaks in its spectrum can reflect the surge frequency. Specifically, the vibration signal is first acquired and processed; vibration sensors (such as accelerometers) are installed at key locations such as the compressor inlet or outlet to acquire vibration velocity signals. Then, feature identification is performed; during surge, the spectrum will show significant low-frequency peaks (typically between 1 and 60 Hz). For example, during the surge of a compressor, the inlet vibration velocity increases from 4 mm / s to 34 mm / s, and the main peaks in the spectrum are 60 Hz and 115 Hz. Finally, pressure pulsation frequency is used for auxiliary verification; surge is accompanied by large low-frequency fluctuations in exhaust pressure (1–10 Hz). The pressure fluctuation period is recorded by a pressure sensor, which directly corresponds to the surge frequency.

[0055] In some embodiments, controlling the air compressor's pressure relief valve to perform a switching action based on the motor's operating frequency and the motor's pre-acquired surge frequency may include: controlling the air compressor's pressure relief valve to perform a switching action at a corresponding rate based on a pre-acquired first relationship; wherein the first relationship is the correlation between the motor's operating frequency, the motor's pre-acquired surge frequency, and the air compressor's pressure relief valve switching action rate.

[0056] Compared to related technologies that rely on a single parameter (such as a pressure threshold) to control the pressure relief valve's opening and closing action, this embodiment dynamically adjusts the pressure relief valve's opening and closing rate by leveraging the correlation between the motor's operating frequency, surge frequency, and the valve's opening and closing rate. This improves the control accuracy of the pressure relief valve, reduces the probability of false triggering, enhances the precision of surge prevention, and improves the air compressor's operational stability. Furthermore, it avoids resonance zones when controlling the pressure relief valve's action, reducing motor blade stress fatigue and bearing wear. Precise control of the pressure relief rate suppresses periodic pressure oscillations and reduces the probability of seals and rotor damage due to severe airflow impact. Related anti-surge solutions require maintaining a large safety margin, leading to increased energy consumption. This embodiment, based on the first relationship, triggers the pressure relief valve's opening and closing control only under critical conditions, reducing ineffective gas circulation.

[0057] For example, the first relationship can be the correlation between the first difference and the switching action rate of the air compressor's pressure relief valve. The first difference is the difference between the motor's operating frequency and the pre-acquired surge frequency. The motor's operating frequency is the current operating frequency obtained in real time through the aforementioned steps.

[0058] Specifically, the first relationship can be expressed as: AVCR = f(Fn - Fnsur), and AVOR = f(AVCR); where Fn is the current operating frequency of the motor; Fnsur is the pre-acquired surge frequency; AVCR is the shut-off rate; AVOR is the opening rate; and f(·) represents a function. The first difference is Fn - Fnsur.

[0059] A dynamic anti-surge strategy is achieved by controlling the opening and closing rate of the air compressor's pressure relief valve based on a first difference value. Related technologies rely on absolute pressure or flow thresholds to control the pressure relief valve's opening and closing, which is susceptible to interference from temperature and gas composition, resulting in poor anti-surge performance. The first difference value, however, reflects the dynamic stability of the motor's operation, quantifying the safe distance between the motor's current operating point and the surge boundary, allowing for a more precise response to surge risk when controlling the pressure relief valve's opening and closing. Related anti-surge strategies require maintaining a flow rate far above the surge threshold, resulting in sustained high energy consumption. In contrast, the first difference value control in this embodiment only operates near the critical point, allowing the air compressor to operate in a more efficient zone closer to the surge boundary, significantly reducing energy consumption and waste. This embodiment achieves precise matching of the pressure relief valve's opening and closing rate based on the first difference value, reducing the coarse control of fully open / closed pressure relief valves, reducing ineffective compressed gas emissions, and saving energy. Controlling the pressure relief valve's opening and closing rate based on the first difference value allows for gradient adjustment of the pressure relief rate, reducing the impact of sudden pressure drops on seals and impellers, and lowering the air compressor's failure rate.

[0060] For example, the first relationship may include: the closing rate of the pressure relief valve is positively correlated with the opening rate; when the first difference is not greater than a preset value, the closing rate is positively correlated with the first difference; when the first difference is greater than a preset value, the closing rate of the pressure relief valve is a preset constant.

[0061] For example, the preset value is denoted as A. When Fn-Fnsur≤A, AVCR is positively correlated with Fn-Fnsur; when Fn-Fnsur>A, AVCR is the preset constant B.

[0062] The first difference is the difference between the motor's operating frequency and the pre-acquired surge frequency. When the first difference is not greater than a preset value, i.e., when the first difference is in a small difference range, the closing rate is positively correlated with the first difference. This can reduce the probability of a sudden pressure rise caused by an excessively fast pressure relief valve closing rate, thus reducing the periodic backflow caused by a sudden rise in exhaust pressure. When the first difference is greater than a preset value, i.e., when the first difference is in a large difference range, the pressure relief valve closing rate is a preset constant. This preset constant is larger than the closing rate when the first difference is in a small difference range. By closing the pressure relief valve quickly at a fixed high rate to restore pressure, the low-pressure state time can be shortened, the design exhaust pressure can be maintained, and gas waste can be reduced. In this way, a graded control strategy for the pressure relief valve opening and closing rate based on the first difference is realized, which takes into account the needs of surge prevention safety, air compressor operation stability, and energy efficiency optimization. Dynamically matching the valve closing rate allows the air compressor to operate in the high-efficiency range for a longer period of time, reducing efficiency losses caused by frequent pressure relief.

[0063] For example, the closing rate of the pressure relief valve is positively correlated with the opening rate, which may include: the closing rate and the opening rate of the pressure relief valve form a linear function with the closing rate as the independent variable and the opening rate as the dependent variable, and the slope of the linear function is positive.

[0064] Specifically, the function f(·) in AVOR = f(AVCR) is a linear function.

[0065] For example, when the first difference is not greater than a preset value, the closing rate is positively correlated with the first difference, which may include: when the first difference is not greater than the preset value, the closing rate and the first difference constitute a linear function with the closing rate as the dependent variable and the first difference as the independent variable, and the slope of the linear function is positive.

[0066] Specifically, refer to Figure 2 As shown, when Fn-Fnsur≤A, AVCR=k*(Fn-Fnsur)+d;

[0067] When Fn - Fnsur > A, AVCR = B; A represents a preset value, B represents a preset constant, and A, B, k, and d are all constants, with k > 0. The slope k and intercept d of this linear function can be obtained in advance by fitting experimental data.

[0068] In the anti-surge control process of air compressors, the closing rate (independent variable) and opening rate (dependent variable) of the pressure relief valve are designed as a linear function with a positive slope, requiring only multiplication and addition operations, without the need for iterative calculation of complex functions, resulting in low computational complexity. This significantly reduces the computational load and provides a faster dynamic response.

[0069] For example, when the first difference is not greater than a preset value, the closing rate is positively correlated with the first difference, which may include: when the first difference is not greater than the preset value, the closing rate and the first difference constitute a quadratic function with the closing rate as the dependent variable and the first difference as the independent variable, and the coefficient of the quadratic term of the quadratic function is positive, and the coefficient of the linear term of the quadratic function is less than 0.

[0070] Specifically, refer to Figure 3 As shown, when Fn - Fnsur ≤ A, AVCR = a*(Fn - Fnsur) 2 +b*(Fn-Fnsur)+c; When Fn-Fnsur>A, AVCR=B; A represents a preset value, B represents a preset constant, A, B, a, b, and c are all constants, a>0, and b<0. The quadratic coefficient a, the linear coefficient b, and the constant term c of this quadratic function can be obtained in advance by fitting experimental data.

[0071] In the control of the air compressor pressure relief valve, the relationship between the closing rate (dependent variable) and the first difference (independent variable) is set as a quadratic function as described above. When the first difference increases, the quadratic term dominates the growth of the quadratic function, the closing rate accelerates non-linearly, the response to high-risk conditions is more rapid, and the incidence of cylinder tripping or compressor shutdown is reduced. The coefficient b of the first term is less than 0, which ensures that the closing rate changes smoothly when the first difference is within a small range, reducing frequent valve fine-tuning operations and minimizing mechanical wear and oscillation risks.

[0072] For example, when the first difference is not greater than a preset value, the closing rate is positively correlated with the first difference, which may include: when the first difference is not greater than the preset value, the closing rate and the first difference constitute a first function with the closing rate as the dependent variable and the first difference as the independent variable. The first function is obtained by translating a first inverse proportional function along the positive direction of the vertical axis of the coordinate system by a first positive value, and the proportional coefficient of the first inverse proportional function is less than 0.

[0073] Specifically, refer to Figure 4 As shown, when Fn-Fnsur≤A, AVCR=(p+q*(Fn-Fnsur)) / (Fn-Fnsur); when Fn-Fnsur>A, AVCR=B; where A represents a preset value, B represents a preset constant, A, B, p, and q are all constants, p<0, and q>0, and Fn≠Fnsur. The coefficients p and q of this first function can be obtained in advance by fitting experimental data. Using the first function to characterize the correlation between the closing rate and the first difference provides higher control safety and better energy efficiency balance for the pressure relief valve.

[0074] The air compressor pressure relief valve control method of this application realizes dynamic adjustment of the opening and closing action of the air compressor pressure relief valve according to the operating frequency of the motor and the pre-acquired surge frequency of the motor. Compared with the related technology that uses a fixed mode to control the opening and closing of the air compressor pressure relief valve, the air compressor pressure relief valve control method of this application improves the applicability of the air compressor, expands the application range of the air compressor, improves the operating stability of the air compressor, and reduces energy waste and noise pollution.

[0075] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0076] refer to Figure 5 As shown, another embodiment of this application provides a pressure relief valve control device for an air compressor, comprising:

[0077] The motor operating frequency acquisition module is used to acquire the operating frequency of the air compressor motor.

[0078] The pressure relief valve control module is used to control the pressure relief valve of the air compressor to perform opening and closing actions based on the operating frequency of the motor and the motor's pre-acquired surge frequency.

[0079] In some implementations, the pressure relief valve control module is further specifically used for:

[0080] Based on the pre-acquired first relationship, the pressure relief valve of the air compressor is controlled to perform a switching action at a corresponding rate; the first relationship is the correlation between the motor's operating frequency, the motor's pre-acquired surge frequency, and the switching action rate of the air compressor's pressure relief valve.

[0081] In some implementations, the first relationship is the correlation between a first difference and the switching rate of the air compressor's pressure relief valve, where the first difference is the difference between the operating frequency and the pre-acquired surge frequency.

[0082] For example, the first relationship includes:

[0083] The closing rate of the pressure relief valve is positively correlated with its opening rate;

[0084] If the first difference is not greater than a preset value, the shutdown rate is positively correlated with the first difference.

[0085] If the first difference is greater than the preset value, the closing rate of the pressure relief valve is a preset constant.

[0086] For example, the closing rate of the pressure relief valve is positively correlated with the opening rate, including: the closing rate and the opening rate of the pressure relief valve constitute a linear function with the closing rate as the independent variable and the opening rate as the dependent variable, and the slope of the linear function is positive.

[0087] For example, when the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including:

[0088] When the first difference is not greater than the preset value, the closing rate and the difference constitute a linear function with the closing rate as the dependent variable and the difference as the independent variable, and the slope of the linear function is positive.

[0089] For example, when the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including:

[0090] When the first difference is not greater than a preset value, the closing rate and the first difference constitute a quadratic function with the closing rate as the dependent variable and the first difference as the independent variable, and the coefficient of the quadratic term of the quadratic function is positive, and the coefficient of the linear term of the quadratic function is less than 0.

[0091] For example, when the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including:

[0092] When the first difference is not greater than a preset value, the closing rate and the first difference constitute a first function with the closing rate as the dependent variable and the first difference as the independent variable. The first function is obtained by translating the first inverse proportional function along the positive direction of the vertical axis of the coordinate system by a first positive value, and the proportional coefficient of the first inverse proportional function is less than 0.

[0093] The air compressor pressure relief valve control device of this application embodiment realizes dynamic adjustment of the opening and closing action of the air compressor pressure relief valve according to the operating frequency of the motor and the pre-acquired surge frequency of the motor. Compared with the related technology that uses a fixed mode to control the opening and closing of the air compressor pressure relief valve, the air compressor pressure relief valve control method of this application embodiment improves the applicability of the air compressor, expands the application range of the air compressor, improves the operating stability of the air compressor, and reduces energy waste and noise pollution.

[0094] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0095] Another embodiment of this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the method of any of the above embodiments.

[0096] refer to Figure 4As shown, the electronic device 10 may include: a processor 100, a memory 101, a bus 102 and a communication interface 103. The processor 100, the communication interface 103 and the memory 101 are connected through the bus 102. The memory 101 stores a computer program that can run on the processor 100. When the processor 100 runs the computer program, it executes the method provided in any of the foregoing embodiments of this application.

[0097] The memory 101 may include high-speed random access memory (RAM), and may also include non-volatile memory, such as at least one disk storage device. Communication between this device network element and at least one other network element is achieved through at least one communication interface 103 (which may be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0098] Bus 102 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. Memory 101 is used to store programs. After receiving an execution instruction, processor 100 executes the program. The methods disclosed in any of the foregoing embodiments of this application can be applied to processor 100, or implemented by processor 100.

[0099] Processor 100 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 100 or by instructions in software form. The processor 100 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may also be a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), an Off-the-shelf 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 application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may 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. The storage medium is located in memory 101. The processor 100 reads the information in memory 101 and, in conjunction with its hardware, completes the steps of the above method.

[0100] The electronic devices and methods provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods they employ, operate, or implement.

[0101] Another embodiment of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the air compressor pressure relief valve control method described in any embodiment of this application.

[0102] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0103] The computer-readable storage medium provided in the above embodiments of this application and the method provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0104] It should be noted that:

[0105] The term "module" is not intended to be limited to a specific physical form. Depending on the application, a module can be implemented as hardware, firmware, software, and / or a combination thereof. Furthermore, different modules may share common components or even be implemented using the same components. Clear boundaries may or may not exist between different modules.

[0106] The algorithms and displays provided herein are not inherently related to any particular computer, virtual device, or other equipment. Various general-purpose devices can also be used with the examples based on this. The required structure for constructing such devices is obvious from the above description. Furthermore, this application is not directed to any particular programming language. It should be understood that the content of this application described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of this application.

[0107] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0108] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for controlling the pressure relief valve of an air compressor, characterized in that, include: Obtain the operating frequency of the air compressor motor; Based on the operating frequency of the motor and the pre-acquired surge frequency of the motor, the pressure relief valve of the air compressor is controlled to perform switching actions.

2. The method as described in claim 1, characterized in that, The step of controlling the pressure relief valve of the air compressor to perform an opening and closing action based on the operating frequency of the motor and the pre-acquired surge frequency of the motor includes: Based on the pre-acquired first relationship, the pressure relief valve of the air compressor is controlled to perform a switching action at a corresponding rate; the first relationship is the correlation between the operating frequency of the motor, the pre-acquired surge frequency of the motor, and the switching action rate of the pressure relief valve of the air compressor.

3. The method as described in claim 2, characterized in that, The first relationship is the correlation between the first difference and the switching action rate of the air compressor's pressure relief valve, where the first difference is the difference between the operating frequency and the pre-acquired surge frequency.

4. The method as described in claim 3, characterized in that, The first relationship includes: The closing rate of the pressure relief valve is positively correlated with its opening rate; If the first difference is not greater than a preset value, the shutdown rate is positively correlated with the first difference; When the first difference is greater than a preset value, the closing rate of the pressure relief valve is a preset constant.

5. The method as described in claim 4, characterized in that, The closing rate of the pressure relief valve is positively correlated with the opening rate, including: the closing rate of the pressure relief valve and the opening rate form a linear function with the closing rate as the independent variable and the opening rate as the dependent variable, and the slope of the linear function is positive.

6. The method as described in claim 4, characterized in that, When the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including: If the first difference is not greater than a preset value, the closing rate and the difference constitute a linear function with the closing rate as the dependent variable and the difference as the independent variable, and the slope of the linear function is positive.

7. The method as described in claim 4, characterized in that, When the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including: When the first difference is not greater than a preset value, the closing rate and the first difference constitute a quadratic function with the closing rate as the dependent variable and the first difference as the independent variable, and the coefficient of the quadratic term of the quadratic function is positive, and the coefficient of the linear term of the quadratic function is less than 0.

8. The method as described in claim 4, characterized in that, When the first difference is not greater than a preset value, the shut-off rate is positively correlated with the first difference, including: When the first difference is not greater than a preset value, the closing rate and the first difference constitute a first function with the closing rate as the dependent variable and the first difference as the independent variable. The first function is obtained by translating a first inverse proportional function along the positive direction of the vertical axis of the coordinate system by a first positive value, and the proportional coefficient of the first inverse proportional function is less than 0.

9. A pressure relief valve control device for an air compressor, characterized in that, include: The motor operating frequency acquisition module is used to acquire the operating frequency of the air compressor motor. The pressure relief valve control module is used to control the pressure relief valve of the air compressor to perform switching actions based on the operating frequency of the motor and the pre-acquired surge frequency of the motor.

10. An electronic device, characterized in that, The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the pressure relief valve control method for an air compressor as described in any one of claims 1-8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program is executed by a processor to implement the pressure relief valve control method for an air compressor as described in any one of claims 1-8.

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