Air compressor and control method, device and equipment thereof, and storage medium

Abstract

The application discloses an air compressor and a control method, device and equipment thereof and a storage medium, and relates to the technical field of air compression. The air compressor comprises an air compressor main body, an air inlet channel, a secondary air inlet pipe, an air outlet channel and a control unit. The air inlet channel and the air outlet channel are connected with the air compressor main body. The air inlet side of the air inlet channel is provided with the secondary air inlet pipe. The air inlet channel is provided with a first flowmeter and a temperature sensor. The secondary air inlet pipe is provided with an electromagnetic valve. The air outlet channel is provided with a second flowmeter and an electric valve. The control method comprises the following steps: obtaining voltage signal change curves of the first flowmeter, the second flowmeter and the temperature sensor; performing time domain analysis on the voltage signal change curves to determine whether the air compressor enters a surge state; and if the air compressor enters the surge state, controlling the electromagnetic valve to be turned on and / or increasing the opening degree of the electric valve. The application can identify the surge of the air compressor and respond in time, so that the air compressor can quickly escape from the surge operation state, and the safety of each structure and operation of the air compressor is protected.

Description

Technical Field

[0001] This invention relates to the field of air compression technology, and in particular to an air compressor and its control method, apparatus, equipment and storage medium. Background Technology

[0002] An air compressor, or simply air compressor, is a device used to compress gas, with a structure similar to that of a water pump. With the rapid development of my country's economy and society, the market size of air compressors has also grown rapidly. In the air compressor control system, the anti-surge control system is a key component. It is essential to comprehensively consider factors such as process production needs, production safety, and energy conservation. Failure to monitor and control air compressor surge can even affect the safe operation of the air compressor, leading to shutdowns and production stoppages. Summary of the Invention

[0003] This invention provides an air compressor and its control method, device, equipment, and storage medium, aiming to solve the problem of air compressor surge affecting the normal operation of the air compressor.

[0004] In a first aspect, embodiments of the present invention provide an air compressor, comprising: an air compressor body, an intake channel, a secondary intake pipe, an exhaust channel, and a control unit. The intake channel is connected to the intake port of the air compressor body, and is provided with a first flow meter for collecting intake air flow and a temperature sensor for collecting intake air temperature. The secondary intake pipe is located on the intake side of the intake channel, and is provided with a solenoid valve for controlling the opening and closing of the secondary intake pipe. The exhaust channel is connected to the exhaust port of the air compressor body, and is provided with a second flow meter for collecting exhaust air flow and an electric valve for controlling exhaust pressure and intake air flow. The control unit is connected to the first flow meter, the second flow meter, the temperature sensor, the solenoid valve, and the electric valve. The control unit is used to collect voltage signals from the first flow meter, the second flow meter, and the temperature sensor to monitor whether the air compressor enters a surge state. When the air compressor enters a surge state, it controls the solenoid valve to open and / or increases the opening of the electric valve.

[0005] In the air compressor provided in the embodiments of the present invention, the air compressor further includes an air filter, which is disposed on the air intake side of the air intake channel.

[0006] In the air compressor provided in the embodiments of the present invention, the air compressor further includes a gas buffer device, which is disposed on the air intake channel and / or the air exhaust channel.

[0007] Secondly, embodiments of the present invention also provide a control method for an air compressor, applied to the air compressor described in the first aspect. The control method includes: acquiring voltage signal change curves of a first flow meter, a second flow meter, and a temperature sensor; performing time-domain analysis on the voltage signal change curves to determine whether the air compressor has entered a surge state; if the air compressor has entered a surge state, controlling the solenoid valve to open and / or increasing the opening degree of the electric valve.

[0008] Thirdly, embodiments of the present invention also provide a control device for an air compressor, comprising: an acquisition unit for acquiring voltage signal change curves of a first flow meter, a second flow meter, and a temperature sensor; a judgment unit for performing time-domain analysis on the voltage signal change curves to determine whether the air compressor has entered a surge state; and a control unit for controlling the solenoid valve to open and / or increasing the opening degree of the electric valve if the air compressor enters a surge state.

[0009] Fourthly, embodiments of the present invention also provide a computer device, the computer device including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in the second aspect.

[0010] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the above-described method.

[0011] This invention provides an air compressor and its control method, apparatus, device, and storage medium. The air compressor includes: an air compressor body, an intake channel, a secondary intake pipe, an exhaust channel, and a control unit. The intake channel and exhaust channel are connected to the air compressor body. The intake channel has a secondary intake pipe on its intake side. The intake channel is equipped with a first flow meter and a temperature sensor. The secondary intake pipe is equipped with a solenoid valve. The exhaust channel is equipped with a second flow meter and an electric valve. The control unit monitors whether the air compressor has entered a surge state by collecting voltage signals from the first and second flow meters and the temperature sensor. If the air compressor is in a surge state, it controls the solenoid valve to open and increases the opening of the electric valve to increase the intake volume. The control method includes: acquiring the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor; performing time-domain analysis on the voltage signal change curves to determine whether the air compressor has entered a surge state; if the air compressor has entered a surge state, it controls the solenoid valve to open and / or increases the opening of the electric valve. The technical solution of this invention analyzes the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor in the time domain to identify whether the air compressor has entered a surge state. If the air compressor is in a surge state, the solenoid valve is turned on and the opening of the electric valve is increased to increase the intake air volume. The two work together to ensure that the air compressor can quickly get out of the surge state and can operate reliably for a long time, thus extending the product life. It has a rapid response and a high degree of automation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of an air compressor provided in an embodiment of the present invention;

[0014] Figure 2 This is a flowchart illustrating the control method for an air compressor provided in an embodiment of the present invention;

[0015] Figure 3 A flowchart illustrating the sub-steps of the air compressor control method provided in an embodiment of the present invention;

[0016] Figure 4 A flowchart illustrating the sub-steps of the air compressor control method provided in an embodiment of the present invention;

[0017] Figure 5 A flowchart illustrating the sub-steps of the air compressor control method provided in an embodiment of the present invention;

[0018] Figure 6A flowchart illustrating the sub-steps of the air compressor control method provided in an embodiment of the present invention;

[0019] Figure 7 A schematic block diagram of a control device for an air compressor provided in an embodiment of the present invention; and

[0020] Figure 8 A schematic block diagram of a computer device provided in an embodiment of the present invention;

[0021] Figure label:

[0022] 1. Air compressor body; 2. Inlet passage; 21. First flow meter; 22. Temperature sensor; 23. Air filter; 24. Gas buffer device; 3. Secondary intake pipe; 31. Solenoid valve; 4. Exhaust passage; 41. Second flow meter; 42. Electric valve. Detailed Implementation

[0023] 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 some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0028] Please see Figure 1 , Figure 1 This is a schematic diagram of an air compressor provided in an embodiment of the present invention. Figure 1 As shown, the air compressor includes: an air compressor body 1, an intake channel 2, a secondary intake pipe 3, an exhaust channel 4, and a control unit. The intake channel 2 is connected to the intake port of the air compressor body 1, and is equipped with a first flow meter 21 for collecting the intake air flow rate and a temperature sensor 22 for collecting the intake air temperature. The secondary intake pipe 3 is located on the intake side of the intake channel 2, and is equipped with a solenoid valve 31 for controlling the opening and closing of the secondary intake pipe 3. The exhaust channel 4 is connected to the exhaust port of the air compressor body 1, and is equipped with a control unit for collecting the intake air temperature. The system includes a second flow meter 41 for exhaust flow and an electric valve 42 for controlling exhaust pressure and intake airflow; a control unit connected to the first flow meter 21, the second flow meter 41, the temperature sensor 22, the solenoid valve 31, and the electric valve 42; wherein the control unit is used to collect voltage signals from the first flow meter 21, the second flow meter 41, and the temperature sensor 22 to monitor whether the air compressor enters a surge state, and when the air compressor enters a surge state, it controls the solenoid valve 31 to open and / or increases the opening of the electric valve 42.

[0029] Specifically, the air compressor body 1 is the component that compresses air, and it has an air inlet and an air outlet. The air inlet is connected to the air intake channel 2, and the air outlet is connected to the air exhaust channel 4. Both the air intake channel 2 and the air exhaust channel 4 are channels composed of pipes. A first flow meter 21 and a temperature sensor 22 are installed in the pipe of the air intake channel 2. The first flow meter 21 collects the air intake flow rate in the air intake channel 2, and the temperature sensor 22 collects the air intake temperature in the air intake channel 2. A second flow meter 41 is installed in the pipe of the air exhaust channel 4. The second flow meter 41 collects the air exhaust flow rate in the air exhaust channel 4. An electric valve 42 is installed on the exhaust side of the air exhaust channel 4. The electric valve 42 controls the exhaust pressure of the air exhaust channel 4 and the air intake flow rate of the air intake channel 2 by controlling its opening degree. When the opening degree of the electric valve 42 increases, the exhaust pressure decreases and the air intake flow rate increases. Conversely, when the opening degree of the electric valve 42 decreases, the exhaust pressure increases and the air intake flow rate decreases. The secondary intake pipe 3 is located on the intake side of the intake channel 2. A solenoid valve 31 is installed on the secondary intake pipe 3. The solenoid valve 31 is used to control the opening and closing of the secondary intake pipe 3. When the secondary intake pipe 3 is open, it is equivalent to increasing the diameter of the intake channel 2 and increasing the intake flow rate. When the secondary intake pipe 3 is closed, the diameter of the intake channel 2 returns to its original size, and the intake flow rate returns to the normal level.

[0030] The control unit is typically a host computer, such as a PC or server. It can also be a control element within the air compressor, which is not limited here. The control unit is connected to various sensors and control elements, specifically to the two flow meters and temperature sensor 22, as well as to the solenoid valve 31 and the electric valve 42. The control unit collects voltage signals from the first flow meter 21, the second flow meter 41, and the temperature sensor 22. It should be noted that the air compressor contains a signal conversion unit and a communication unit. The signal conversion unit converts the signals collected by the first flow meter 21, the second flow meter 41, and the temperature sensor 22 into a unified voltage signal, which is then transmitted to the control unit via the communication unit, enabling the control unit to collect the voltage signals from each sensor in real time. The signal conversion unit is well-known to those skilled in the art and will not be described in detail here. The communication unit can be wireless or wired communication, such as Bluetooth, Wi-Fi, or a 5G module. The control unit controls the opening and closing of the solenoid valve 31 and the opening degree of the electric valve 42 by outputting control signals. The control unit monitors the air compressor for surge by collecting voltage signals in real time. If surge is detected, it activates solenoid valve 31, which in turn opens the auxiliary intake pipe 3, increasing the diameter of the intake passage 2 and thus increasing the intake flow rate, allowing the air compressor to quickly recover from surge. Alternatively, it can control electric valve 42 to increase its opening, reducing discharge pressure and increasing the intake flow rate, further helping the air compressor recover from surge. It is understandable that both solenoid valve 31 and electric valve 42 can be activated simultaneously; their combined action ensures the air compressor quickly recovers from surge, protecting its normal operation.

[0031] Continue to refer to Figure 1 In one embodiment, the air compressor further includes an air filter 23, which is disposed on the intake side of the intake channel 2. Specifically, since the air filter 23 is disposed on the intake side of the intake channel 2, all gas entering the intake channel 2 needs to be filtered by the air filter 23 first to remove dust and impurities from the air, preventing dust and impurities in the gas from entering the air compressor and damaging the components, thus ensuring the reliable operation of the air compressor.

[0032] Continue to refer to Figure 1In one embodiment, the air compressor further includes a gas buffer device 24, which is disposed on the intake channel 2 and / or the exhaust channel 4. Specifically, the gas buffer device 24 serves to stabilize the airflow. The gas buffer device 24 installed on one side of the intake channel 2 stabilizes the intake airflow, preventing excessive pressure fluctuations and ensuring intake stability. The gas buffer device 24 installed on the other side of the exhaust channel 4 stabilizes the exhaust airflow, preventing excessive pressure fluctuations and ensuring exhaust stability. It is understood that the gas buffer device 24 can be installed only on the intake channel 2, only on the exhaust channel 4, or on both the intake channel 2 and the exhaust channel 4.

[0033] The operation of the air compressor will be explained below by comparing it to two states: normal operation and surge.

[0034] When the air compressor is in normal operation, the gas is filtered through air filter 23 and enters the intake passage 2. After being compressed by the air compressor, it is finally discharged from the exhaust passage 4. Throughout the normal operation, electric valve 42 is in the open state, while solenoid valve 31 is in the closed state. The control unit collects the voltage signals from the flow meter and temperature sensor 22 in real time, obtaining their variation curves.

[0035] During operation, adjusting the opening of the electric valve 42 reduces its size, causing the exhaust pressure to rise and the compressor's intake flow rate to decrease. When the exhaust pressure reaches a certain level, the compressor's intake flow rate drops rapidly, causing it to enter a surge state. When in a surge state, the strong pulsations and periodic oscillations of the airflow cause the blades to vibrate violently, potentially damaging the compressor's bearings and blades, and even leading to serious accidents.

[0036] When surge is detected in the air compressor, the control unit activates solenoid valve 31, increasing the diameter of intake passage 2; it also controls electric valve 42, increasing the valve opening, reducing discharge pressure, and increasing intake flow. These two actions work together to ensure the air compressor quickly recovers from surge, protecting its normal operation. Through the monitoring, processing, identification, and control of the control unit, the anti-surge function of the air compressor is achieved.

[0037] By implementing the embodiments of the present invention, the surge of the air compressor can be quickly and automatically detected and responded to in a timely manner, so that the air compressor can quickly get out of the surge operation state, protect the components in the air compressor, ensure that the air compressor can operate reliably for a long time, and extend the service life of the air compressor.

[0038] Reference Figure 2 The present invention also provides a control method for an air compressor, which is applied to the air compressor described in the above embodiments. Figure 2 This is a schematic flowchart illustrating the steps of a control method for an air compressor according to an embodiment of the present invention. The control method includes steps S110-S130.

[0039] S110: Obtain the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor.

[0040] In this embodiment, the control unit is a host computer. The host computer collects the voltage signals from the first flow meter, the second flow meter, and the temperature sensor in real time, and processes the multiple voltage signals according to the time domain changes to obtain voltage signal change curves. After processing, the voltage signal change curves corresponding to the intake flow rate changes collected by the first flow meter, the exhaust flow rate changes collected by the second flow meter, and the temperature changes collected by the temperature sensor are obtained respectively.

[0041] S120. Perform time-domain analysis on the voltage signal change curve to determine whether the air compressor has entered a surge state.

[0042] In this embodiment, time-domain analysis refers to analyzing the stability, transient, and steady-state performance of the control system under certain inputs based on the time-domain expression of the output. Since time-domain analysis directly analyzes the system in the time domain, it has the advantages of being intuitive and accurate. The time-domain representation of the system output can be obtained from differential equations or transfer functions. Specifically, this embodiment comprehensively judges the voltage signal change curves of the first, second, and third flow meters. When the set identification conditions are met, the air compressor is identified as being in a surge state. By performing time-domain analysis on the voltage signal changes, the operating state of the air compressor can be determined in real time, the surge state can be identified in a timely manner, and control actions can be executed promptly to allow the air compressor to quickly recover from the surge and ensure the normal operation of the air compressor.

[0043] In one embodiment, such as Figure 3 As shown, step S120 further includes steps S121-S124.

[0044] S121. Determine whether there are abnormal fluctuations in the voltage signal change curve of the first flow meter;

[0045] S122. If the voltage signal change curve of the first flow meter shows abnormal fluctuations, determine whether there are abnormal fluctuations in the voltage signal change curve of the second flow meter.

[0046] S123. If abnormal fluctuations occur in the voltage signal change curve of the second flow meter, determine whether abnormal fluctuations occur in the voltage signal change curve of the temperature sensor.

[0047] S124. If abnormal fluctuations occur in the voltage signal change curve of the temperature sensor, it is determined that the air compressor has entered a surge state.

[0048] In this embodiment, abnormal fluctuations in the voltage signal change curve are used to determine whether the air compressor has entered a surge state. Abnormal fluctuations are characterized by spikes in the change curve; the presence of spikes indicates abnormal fluctuations. Using only one parameter for identification can easily lead to misjudgments. Therefore, this embodiment uses different parameters to avoid misjudgments caused by overly simplistic criteria, thereby improving the accuracy of surge identification. Specifically, first, the voltage signal change curve of the intake airflow is checked for abnormal fluctuations; if abnormal fluctuations are found, the voltage signal change curve of the exhaust airflow is checked for abnormal fluctuations; if abnormal fluctuations are found, the voltage signal change curve of the intake air temperature is checked for abnormal fluctuations; if abnormal fluctuations are found, it indicates that the air compressor is in a surge state. Thus, by using three different parameters for comprehensive evaluation, the accuracy of surge identification is ensured, avoiding misjudgments and subsequent miscontrols, and preventing impact on work efficiency.

[0049] In one embodiment, such as Figure 4 As shown, step S121 further includes steps S1211-S1215.

[0050] S1211. Obtain the first maximum value, first minimum value, and first average value from the voltage signal change curve of the first flow meter;

[0051] S1212. Determine the first intake flow fluctuation value based on the difference between the first maximum value and the first minimum value;

[0052] S1213. Determine the second intake flow fluctuation value based on the difference between the first average value and the first minimum value;

[0053] S1214. Determine whether the first intake flow fluctuation value is greater than the product of the second intake flow fluctuation value and the budget coefficient;

[0054] S1215. If the first intake flow fluctuation value is greater than the product of the second intake flow fluctuation value and the budget coefficient, then it is determined that there is an abnormal fluctuation in the voltage signal change curve of the first flow meter.

[0055] In this embodiment, it is first determined whether there is a peak in the voltage signal change curve corresponding to the intake air flow rate. Specifically, the first maximum value x is extracted from the voltage signal change curve corresponding to the intake air flow rate. max First minimum value x min and the first average Then calculate the difference between the first maximum value and the first minimum value, which is x. max -x min The first intake flow rate fluctuation value is determined, which is the maximum fluctuation value in the change curve; then the difference between the first average value and the first minimum value is calculated, i.e. The second intake flow fluctuation value is determined, and the first intake flow fluctuation value is the average fluctuation value in the change curve. It is understood that this average fluctuation value can also be determined by calculating the difference between the first average value and the first maximum value. Finally, the product of the first intake flow fluctuation value and the second intake flow fluctuation value with a budget coefficient is compared. The preset coefficient is 2, but it can also be other numbers. If so, it indicates that there is a spike in the voltage signal change curve corresponding to the intake air flow, and the intake air flow has fluctuated abnormally.

[0056] In one embodiment, such as Figure 5 As shown, step S122 further includes steps S1221-S1225.

[0057] S1221. Obtain the second maximum value, the second minimum value, and the second average value from the voltage signal change curve of the second flow meter;

[0058] S1222. Determine the second exhaust flow fluctuation value based on the difference between the second maximum value and the second minimum value;

[0059] S1223. Determine the second exhaust flow fluctuation value based on the difference between the second average value and the second minimum value;

[0060] S1224. Determine whether the second exhaust flow fluctuation value is greater than the product of the second exhaust flow fluctuation value and the budget coefficient;

[0061] S1225. If the second exhaust flow fluctuation value is greater than the product of the second exhaust flow fluctuation value and the budget coefficient, then it is determined that there is an abnormal fluctuation in the voltage signal change curve of the second flow meter.

[0062] In this embodiment, after identifying abnormal fluctuations in the intake airflow, further analysis is performed to determine whether abnormal fluctuations in the exhaust airflow are present in order to further identify the surge condition. Specifically, the second maximum value y is first extracted from the voltage signal change curve corresponding to the exhaust airflow. max The second minimum value y min The second average value y; then calculate the difference between the second maximum value and the second minimum value, i.e., y max -y minThe first exhaust flow rate fluctuation value is determined, which is the maximum fluctuation value in the change curve; then the difference between the second average value and the second minimum value is calculated, i.e., yy min The second exhaust flow fluctuation value is determined, which is the average fluctuation value in the change curve. It is understood that this average fluctuation value can also be determined by calculating the difference between the second average value and the second maximum value. Finally, the product of the first exhaust flow fluctuation value and the second exhaust flow fluctuation value with the budget coefficient is compared. The preset coefficient is 2, but it can also be other numbers. This is the determination of (y... max -y min )>2*(yy min If so, it indicates that there is a spike in the voltage signal change curve corresponding to the exhaust flow rate, and the exhaust flow rate has fluctuated abnormally.

[0063] In one embodiment, such as Figure 6 As shown, step S122 further includes steps S1231-S1235.

[0064] S1231. Obtain the third maximum value, third minimum value, and third average value from the voltage signal change curve of the temperature sensor;

[0065] S1232. Determine the first temperature fluctuation value based on the difference between the third maximum value and the third minimum value;

[0066] S1233. Determine the second temperature fluctuation value based on the difference between the third average value and the three minimum values;

[0067] S1234. Determine whether the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient;

[0068] S1235. If the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient, then it is determined that there is an abnormal fluctuation in the voltage signal change curve of the temperature sensor.

[0069] In this embodiment, after identifying abnormal fluctuations in exhaust flow, further analysis is performed to determine whether abnormal fluctuations in intake air temperature are present in order to further identify surge conditions. Specifically, the third maximum value z is first extracted from the voltage signal change curve corresponding to the intake air temperature. max The third minimum value z min and the third average Then calculate the difference between the third maximum and the third minimum, i.e., z. max -z minThe first temperature fluctuation value is determined, which is the maximum fluctuation value in the change curve; then the difference between the third average value and the third minimum value is calculated, i.e. The second temperature fluctuation value is determined; this second temperature fluctuation value is the average fluctuation value in the change curve. It is understood that this average fluctuation value can also be determined by calculating the difference between the third average value and the third maximum value. Finally, the products of the first and second temperature fluctuation values ​​and the budget coefficient are compared. The preset coefficient is 1.5, but it can also be other numbers. If so, it indicates that a spike appears in the voltage signal change curve corresponding to the intake air temperature, indicating abnormal fluctuations in the intake air temperature. Therefore, it can be seen that the three parameters mentioned above—intake flow rate, exhaust flow rate, and intake air temperature—have all shown abnormal fluctuations, thus ensuring that the air compressor is indeed in a surge state, thereby improving the accuracy of identification.

[0070] S130. If the air compressor enters a surge state, control the solenoid valve to open and / or increase the opening of the electric valve.

[0071] In this embodiment, when the host computer detects that the air compressor is in a surge state, the air compressor experiences strong vibrations, which can easily damage its internal components. Therefore, this embodiment sends control signals from the host computer to the solenoid valve and the electric valve. The solenoid valve opens, opening the secondary intake pipe and increasing the diameter of the intake passage, thus increasing the intake volume. The electric valve also increases its opening, reducing the exhaust pressure and increasing the intake volume. These two actions work together to ensure the air compressor quickly recovers from the surge state, protecting its operational safety.

[0072] In other embodiments, on the one hand, since the opening degree of the electric valve affects the compression efficiency of the air compressor, when the opening degree of the electric valve decreases, the intake air flow will decrease as the valve opening degree decreases, and the exhaust pressure will increase as the valve opening degree decreases, thereby reducing the load on the air compressor and affecting the compression efficiency of the air compressor; on the other hand, the opening degree of the electric valve is also closely related to the surge of the air compressor. Therefore, in order to ensure that the opening degree of the electric valve can be kept within a certain range, so that the air compressor can operate efficiently and normally. In this embodiment, when the air compressor experiences surge, the voltage signals U1, U2, and U3 of the intake flow rate, exhaust flow rate, and intake temperature, as well as the opening degree K of the electric valve, are acquired. U1, U2, U3, and K are used as critical values. Based on these critical values, adjustments are made according to a preset adjustment amount, where the preset adjustment amount is a constant satisfying the following formula: P = P' * (1 + q), where P' represents the reference parameters to be adjusted, i.e., U1, U2, U3, and K; P represents the adjusted parameters; and q is the adjustment margin, determined by the diameter of the intake channel and the auxiliary intake pipe. Specifically, the diameters of the intake channel and the auxiliary intake pipe are normalized based on the intake channel, resulting in a normalized intake channel diameter of 1 and an auxiliary intake pipe diameter of q. The acquired voltage signals and the opening degree of the electric valve are then adjusted according to the preset adjustment amount. Air compressor surge detection is performed based on the adjusted voltage signal. The opening of the electric valve is then controlled according to the adjusted opening. This ensures that the air compressor can detect surge in advance and execute control actions accordingly, allowing for efficient operation without the risk of surge, thus guaranteeing both compression efficiency and operational safety.

[0073] Figure 7 This is a schematic block diagram of a control device 200 for an air compressor provided in an embodiment of the present invention. Figure 7 As shown, corresponding to the above-described air compressor control method, the present invention also provides an air compressor control device 200. This air compressor control device 200 includes a unit for executing the above-described air compressor control method, and the device can be configured within the air compressor. Specifically, please refer to... Figure 7 The control device 200 of the air compressor includes an acquisition unit 201, a judgment unit 202, and a control unit 203.

[0074] The acquisition unit 201 is used to acquire the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor; the judgment unit 202 is used to perform time-domain analysis on the voltage signal change curves to determine whether the air compressor has entered a surge state; and the control unit 203 is used to control the solenoid valve to open and / or increase the opening of the electric valve if the air compressor enters a surge state.

[0075] In some embodiments, such as this one, the judgment unit 202 includes a first judgment subunit, a second judgment subunit, a third judgment subunit, and a determination unit.

[0076] The system includes a first judgment subunit for judging whether abnormal fluctuations occur in the voltage signal change curve of the first flow meter; a second judgment subunit for judging whether abnormal fluctuations occur in the voltage signal change curve of the second flow meter if abnormal fluctuations occur in the voltage signal change curve of the first flow meter; a third judgment subunit for judging whether abnormal fluctuations occur in the voltage signal change curve of the second flow meter if abnormal fluctuations occur in the voltage signal change curve of the second flow meter; and a determination unit for determining that the air compressor has entered a surge state if abnormal fluctuations occur in the voltage signal change curve of the temperature sensor.

[0077] In some embodiments, such as this embodiment, the first determination subunit includes a first extraction unit, a first intake fluctuation unit, a second intake fluctuation unit, a first fluctuation determination unit, and a first determination subunit.

[0078] The system includes: a first extraction unit for acquiring the first maximum value, the first minimum value, and the first average value of the voltage signal change curve of the first flow meter; a first intake fluctuation unit for determining a first intake flow fluctuation value based on the difference between the first maximum value and the first minimum value; a second intake fluctuation unit for determining a second intake flow fluctuation value based on the difference between the first average value and the first minimum value; a first fluctuation judgment unit for determining whether the first intake flow fluctuation value is greater than the product of the second intake flow fluctuation value and the budget coefficient; and a first determination subunit for determining that an abnormal fluctuation has occurred in the voltage signal change curve of the first flow meter if the first intake flow fluctuation value is greater than the product of the second intake flow fluctuation value and the budget coefficient.

[0079] In some embodiments, such as this embodiment, the second determination subunit includes a second extraction unit, a first exhaust fluctuation unit, a second exhaust fluctuation unit, a second fluctuation determination unit, and a second determination subunit.

[0080] The system includes: a second extraction unit for acquiring the second maximum value, the second minimum value, and the second average value from the voltage signal change curve of the second flow meter; a first exhaust fluctuation unit for determining the second exhaust flow fluctuation value based on the difference between the second maximum value and the second minimum value; a second exhaust fluctuation unit for determining the second exhaust flow fluctuation value based on the difference between the second average value and the second minimum value; a second fluctuation judgment unit for determining whether the second exhaust flow fluctuation value is greater than the product of the second exhaust flow fluctuation value and the budget coefficient; and a second determination subunit for determining that an abnormal fluctuation has occurred in the voltage signal change curve of the second flow meter if the second exhaust flow fluctuation value is greater than the product of the second exhaust flow fluctuation value and the budget coefficient.

[0081] In some embodiments, such as this embodiment, the third judgment subunit includes: a third extraction unit, a first temperature fluctuation unit, a second temperature fluctuation unit, a third fluctuation judgment unit, and a third determination subunit.

[0082] The third extraction unit is used to obtain the third maximum value, the third minimum value, and the third average value in the voltage signal change curve of the temperature sensor; the first temperature fluctuation unit is used to determine the first temperature fluctuation value based on the difference between the third maximum value and the third minimum value; the second temperature fluctuation unit is used to determine the second temperature fluctuation value based on the difference between the third average value and the three minimum values; the third fluctuation judgment unit is used to determine whether the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient; the third determination subunit is used to determine that an abnormal fluctuation has occurred in the voltage signal change curve of the temperature sensor if the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient.

[0083] The control device for the aforementioned air compressor can be implemented as a computer program, which can, for example... Figure 8 The air compressor shown is running.

[0084] Please see Figure 8 , Figure 8 This is a schematic block diagram of an air compressor provided in an embodiment of the present invention. The air compressor 300 includes an air compressor body, an air intake passage, a secondary air intake pipe, an exhaust passage, and a control unit.

[0085] See Figure 8 The air compressor 300 includes a processor 302, a memory, and a network interface 305 connected via a system bus 301. The memory may include a non-volatile storage medium 303 and internal memory 304.

[0086] The non-volatile storage medium 303 may store an operating system 3031 and a computer program 3032. When the computer program 3032 is executed, it causes the processor 302 to execute a control method for an air compressor.

[0087] The processor 302 provides computing and control capabilities to support the operation of the entire air compressor 300.

[0088] The internal memory 304 provides an environment for the operation of the computer program 3032 in the non-volatile storage medium 303. When the computer program 3032 is executed by the processor 302, the processor 302 can execute a control method for an air compressor.

[0089] This network interface 305 is used for network communication with other devices. Those skilled in the art will understand that... Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the air compressor 300 to which the present invention is applied. The specific air compressor 300 may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0090] The processor 302 is used to run a computer program 3032 stored in a memory to implement any embodiment of the control method for the air compressor described above.

[0091] It should be understood that, in this embodiment of the invention, the processor 302 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0092] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program may be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0093] Therefore, the present invention also provides a storage medium. This storage medium can be a computer-readable storage medium. The storage medium stores a computer program. When executed by a processor, the computer program causes the processor to perform any embodiment of the control method for the air compressor described above.

[0094] The storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0095] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0096] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0097] The steps in the method of this invention can be adjusted, merged, or reduced in order according to actual needs. The units in the device of this invention can be merged, divided, or reduced according to actual needs. Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0098] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an air compressor to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0099] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0101] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air compressor, characterized in that, include: Air compressor body; An air intake channel is connected to the air intake port of the air compressor body. The air intake channel is equipped with a first flow meter for collecting the air intake flow rate and a temperature sensor for collecting the air intake temperature. A secondary air intake pipe is provided on the air intake side of the air intake channel, and a solenoid valve for controlling the opening and closing of the secondary air intake pipe is provided on the secondary air intake pipe. An exhaust passage is connected to the exhaust port of the air compressor body. The exhaust passage is equipped with a second flow meter for collecting exhaust flow and an electric valve for controlling exhaust pressure and intake airflow. The control unit is connected to the first flow meter, the second flow meter, the temperature sensor, the solenoid valve, and the electric valve; The control unit is used to collect voltage signals from the first flow meter, the second flow meter, and the temperature sensor to monitor whether the air compressor has entered a surge state. When the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor all show abnormal fluctuations, indicating that the air compressor has entered a surge state, the control unit controls the solenoid valve to open and / or increases the opening of the electric valve.

2. The air compressor according to claim 1, characterized in that, The air compressor also includes an air filter, which is located on the intake side of the intake passage.

3. The air compressor according to claim 1, characterized in that, The air compressor also includes a gas buffer device, which is disposed on the air intake passage and / or the exhaust passage.

4. A control method for an air compressor, characterized in that, The control method, applied to the air compressor according to any one of claims 1-3, comprises: Obtain the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor; To determine whether the air compressor has entered a surge state, the voltage signal change curve of the first flow meter, the voltage signal change curve of the second flow meter, and the voltage signal change curve of the temperature sensor all show abnormal fluctuations. If the air compressor enters a surge state, the solenoid valve is turned on and / or the opening of the electric valve is increased.

5. The control method according to claim 4, characterized in that, The step of determining whether abnormal fluctuations occur in the voltage signal change curve of the first flow meter includes: Obtain the first maximum value, first minimum value, and first average value from the voltage signal change curve of the first flow meter; The first intake flow fluctuation value is determined based on the difference between the first maximum value and the first minimum value; The second intake flow fluctuation value is determined based on the difference between the first average value and the first minimum value; Determine whether the first intake flow fluctuation value is greater than the product of the second intake flow fluctuation value and the budget coefficient; If the first intake flow rate fluctuation value is greater than the product of the second intake flow rate fluctuation value and the budget coefficient, then it is determined that there is an abnormal fluctuation in the voltage signal change curve of the first flow meter.

6. The control method according to claim 4, characterized in that, The step of determining whether abnormal fluctuations occur in the voltage signal change curve of the temperature sensor includes: Obtain the third maximum value, third minimum value, and third average value from the voltage signal change curve of the temperature sensor; The first temperature fluctuation value is determined based on the difference between the third maximum value and the third minimum value; The second temperature fluctuation value is determined based on the difference between the third average value and the three minimum values; Determine whether the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient; If the first temperature fluctuation value is greater than the product of the second temperature fluctuation value and the budget coefficient, then it is determined that there is an abnormal fluctuation in the voltage signal change curve of the temperature sensor.

7. A control device for an air compressor, characterized in that, include: The acquisition unit is used to acquire the voltage signal change curves of the first flow meter, the second flow meter, and the temperature sensor; The judgment unit is used to determine whether the voltage signal change curve of the first flow meter, the voltage signal change curve of the second flow meter, and the voltage signal change curve of the temperature sensor all show abnormal fluctuations in order to determine whether the air compressor has entered a surge state. The control unit is used to control the solenoid valve to open and / or increase the opening of the electric valve if the air compressor enters a surge state.

8. A computer device, characterized in that, The computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method as described in any one of claims 4-6.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, can implement the method as described in any one of claims 4-6.

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