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 belongs to the technical field of air compressors. The air compressor comprises an air compressor main body, a noise collector, a vibration collector, an air inlet channel, an air outlet channel and a control unit. The noise collector collects noise signals of the air compressor main body, and the vibration collector collects vibration signals of the air compressor main body. The air inlet channel is provided with a pipe diameter expansion device, and the air outlet channel is provided with an electric valve. The control method comprises the following steps: obtaining a noise signal change curve of the noise collector and a vibration signal change curve of the vibration collector; performing time domain analysis on the noise signal change curve and the vibration signal change curve to determine whether the air compressor enters a surge state; and if the air compressor enters the surge state, controlling the pipe diameter expansion device to expand the diameter and increasing the opening of the electric valve. The application realizes real-time monitoring of the surge state of the air compressor, avoids operation of the air compressor under the surge working condition, can quickly escape from the surge state, and avoids damage to components of the air compressor.

Description

Technical Field

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

[0002] Centrifugal air compressors, also known as centrifugal air compressors, operate on a principle similar to a blower. They draw in air through the high-speed rotation of an impeller, accelerate the rotation, and generate centrifugal force, creating dynamic pressure. This dynamic pressure is then converted into static pressure, resulting in compressed air that is output at a certain pressure. During operation, air compressors may experience surge, an unstable operating condition characterized by abnormal performance. Surge manifests as periodic oscillations in the airflow throughout the unit's piping system. This not only significantly degrades the compressor's performance and causes large fluctuations in airflow parameters (pressure and flow rate), greatly exacerbating the compressor's vibration, but also causes severe vibration of the compressor blades, potentially damaging bearings and blades, and even leading to serious accidents. Therefore, operation under surge conditions must be avoided in practice. 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 components being damaged by vibration due to surge.

[0004] In a first aspect, embodiments of the present invention provide an air compressor, comprising: an air compression unit, an intake passage, an exhaust passage, and a control unit. The air compression unit includes an air compressor body, a noise collector, and a vibration collector disposed on the air compressor body. The noise collector is used to collect noise signals from the air compressor body, and the vibration collector is used to collect vibration signals from the air compressor body. The intake passage is connected to the intake port of the air compressor body, and the intake passage is provided with a pipe diameter expansion device for adjusting the pipe diameter of the intake passage. The exhaust passage is connected to the exhaust port of the air compressor body, and the exhaust passage is provided with an electric valve for controlling the exhaust pressure and intake airflow. The control unit is connected to the noise collector, the vibration collector, and the electric valve. The control unit is used to collect noise signals from the noise collector and vibration signals from the vibration collector to monitor whether the air compressor enters a surge state. When the air compressor enters a surge state, it controls the pipe diameter expansion device to expand the pipe diameter and increases the opening degree of the electric valve.

[0005] In the air compressor provided in the embodiments of the present invention, the air compression unit further includes a soundproof cover, which covers the air compressor body and the noise collector.

[0006] 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.

[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 the noise signal variation curve of a noise collector and the vibration signal variation curve of a vibration collector; performing time-domain analysis on the noise signal variation curve and the vibration signal variation curve to determine whether the air compressor has entered a surge state; if the air compressor enters a surge state, controlling the pipe diameter expansion device to expand the diameter and 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 the noise signal change curve of a noise collector and the vibration signal change curve of a vibration collector; a judgment unit for performing time-domain analysis on the noise signal change curve and the vibration signal change curve to determine whether the air compressor has entered a surge state; and a control unit for controlling the pipe diameter expansion device to expand the diameter and 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, equipment, and storage medium. The air compressor includes an air compressor body, a noise collector, a vibration collector, an intake passage, an exhaust passage, and a control unit. The noise collector collects noise signals from the air compressor body, and the vibration collector collects vibration signals from the air compressor body. The intake passage is equipped with a pipe diameter expansion device, and the exhaust passage is equipped with an electric valve. The control unit monitors whether the air compressor has entered a surge state by collecting noise signals from the noise collector and vibration signals from the vibration collector. If the air compressor is in a surge state, it controls the pipe diameter expansion device to expand its diameter and increases the opening of the electric valve to increase the intake volume. The control method includes: acquiring the noise signal variation curve of the noise collector and the vibration signal variation curve of the vibration collector; performing time-domain analysis on the noise signal variation curve and the vibration signal variation curve to determine whether the air compressor has entered a surge state; if the air compressor has entered a surge state, it controls the pipe diameter expansion device to expand its diameter and increases the opening of the electric valve. The technical solution of this invention performs time-domain analysis on the noise signal change curve of the noise collector and the vibration signal change curve of the vibration collector to identify whether the air compressor has entered a surge state. If the air compressor is in a surge state, the pipe diameter expansion device is controlled to expand the diameter and the opening of the electric valve is increased. This achieves real-time monitoring of the air compressor's surge state, avoids the air compressor from operating under surge conditions, can quickly get out of the surge state, avoids damage to air compressor components, improves the reliability and stability of air compressor operation, and extends service life. 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 6 A schematic block diagram of a control device for an air compressor provided in an embodiment of the present invention; and

[0019] Figure 7 A schematic block diagram of a computer device provided in an embodiment of the present invention;

[0020] Figure label:

[0021] 1. Air compressor body; 11. Noise collector; 12. Vibration collector; 13. Soundproof enclosure; 2. Air intake passage; 21. Pipe diameter expansion device; 22. Air filter; 3. Exhaust passage; 31. Electric valve. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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]."

[0027] Please see Figure 1 , Figure 1 This is a structural schematic diagram of the air compressor provided in an embodiment of the present invention. Figure 1 As shown, the air compressor includes: an air compression unit, an intake passage 2, an exhaust passage 3, and a control unit. The air compression unit includes an air compressor body 1, a noise collector 11, and a vibration collector 12 mounted on the air compressor body 1. The noise collector 11 collects noise signals from the air compressor body 1, and the vibration collector 12 collects vibration signals from the air compressor body 1. The intake passage 2 is connected to the air inlet of the air compressor body 1, and the intake passage 2 is equipped with a pipe diameter expansion device 21 for adjusting the pipe diameter of the intake passage 2. The exhaust passage 3... Channel 3 is connected to the exhaust port of the air compressor body 1. The exhaust channel 3 is equipped with an electric valve 31 for controlling the exhaust pressure and intake air volume. Control unit is connected to the noise collector 11, the vibration collector 12 and the electric valve 31. The control unit is used to collect the noise signal of the noise collector 11 and the vibration signal of the vibration collector 12 to monitor whether the air compressor enters a surge state. When the air compressor enters a surge state, it controls the pipe diameter expansion device 21 to expand the diameter and increases the opening of the electric valve 31.

[0028] 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 3. Both the air intake channel 2 and the air exhaust channel 3 are channels composed of pipes. A vibration collector 12 is installed on the housing of the air compressor body 1. When the air compressor enters a surge state, the vibration collector 12 vibrates along with the air compressor body 1, thereby collecting vibration signals. The vibration collector 12 can be, for example, a vibration sensor. A noise collector 11 is located next to the air compressor body 1, or it can be located on the air compressor body 1, as long as it is close enough to collect noise. When the air compressor enters a surge state, strong vibration is accompanied by strong periodic noise. Therefore, the noise collector 11 is used to collect the noise of the air compressor and to identify surge. The noise collector 11 can be, for example, a noise sensor or a microphone.

[0029] A pipe diameter expansion device 21 is installed in the intake channel 2. The pipe diameter expansion device 21 can adjust the size of the intake channel 2, thereby adjusting the intake volume of the intake channel 2. The pipe diameter expansion device 21 can have various structural forms. For example, it can be a diameter expansion cavity set in the intake channel 2, the diameter of which is larger than the pipe diameter of the intake channel 2. A movable adjustment element (e.g., a movable baffle) is set in the diameter expansion cavity. By moving the adjustment element, the intake area of ​​the diameter expansion cavity is changed, thereby adjusting the intake volume. The larger the intake area, the larger the intake volume, and the smaller the intake area, the smaller the intake volume. Of course, it can be understood that other structural forms are also possible, which are not limited here. The electric valve 31 is installed on the exhaust side of the exhaust channel 3. The electric valve 31 controls the exhaust pressure of the exhaust channel 3 and the intake flow of the intake channel 2 by controlling its opening. When the opening of the electric valve 31 increases, the exhaust pressure decreases and the intake flow increases. Conversely, when the opening of the electric valve 31 decreases, the exhaust pressure increases and the intake flow decreases.

[0030] The control unit is typically a host computer, such as a PC or server. It can also be a control element inside the air compressor, which is not limited here. The control unit is connected to various sensors and control elements, specifically to the noise collector 11 and vibration collector 12, as well as to the pipe diameter expansion device 21 and the electric valve 31. The control unit collects noise signals from the noise collector 11 and vibration signals from the vibration collector 12. It should be noted that the control unit adjusts the expansion degree of the pipe diameter expansion device 21 (the degree of diameter adjustment) and controls the opening degree of the electric valve 31 by outputting control signals. The control unit monitors whether the air compressor is experiencing surge by collecting noise and vibration signals in real time. If surge is detected, the control unit increases the pipe diameter of the pipe diameter expansion device 21, thereby increasing the pipe diameter of the intake passage 2 and increasing the intake flow rate, allowing the air compressor to quickly recover from surge. If surge is detected, the control unit can also increase the valve opening of the electric valve 31, reducing the discharge pressure and increasing the intake flow rate, thus allowing the air compressor to quickly recover from surge. It is understandable that the pipe diameter of the expansion device 21 and the opening of the electric valve 31 can be increased at the same time. The two work together to ensure that the air compressor can quickly get out of the surge state and protect the normal operation of the air compressor.

[0031] Continue to refer to Figure 1In one embodiment, the air compression unit further includes a soundproof cover 13, which covers the air compressor body 1 and the noise collector 11. Specifically, the soundproof cover 13 can be a shell made of sound-insulating material or a plastic shell. The inner side of the plastic shell is covered with sound-insulating cotton. The soundproof cover 13 is shaped to match the air compressor body 1 and is completely covered on the outside of the air compressor body 1, covering the air compressor body 1 and the noise collection device, concentrating the sound source, preventing noise leakage, and improving the collection effect of the noise collector 11.

[0032] Continue to refer to Figure 1 In one embodiment, the air compressor further includes an air filter 22, which is disposed on the intake side of the intake channel 2. Specifically, since the air filter 22 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 22 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.

[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 22 and enters the intake passage 2. After being compressed by the air compressor, it is finally discharged from the exhaust passage 3. Throughout normal operation, the electric valve 31 is always open, and the pipe diameter expansion device 21 is not activated. The control unit collects the time-domain signals of the noise collector 11 and vibration collector 12 in real time to obtain their variation curves.

[0035] During operation, adjusting the opening of the electric valve 31 reduces the intake air flow and increases the exhaust pressure. At this time, the compressor noise is relatively low and continuous, and the vibration is relatively stable. However, when the valve opening is too small, the exhaust pressure suddenly increases, while the intake air flow rapidly decreases. This causes the compressor cylinder and bearings to vibrate strongly, accompanied by loud, periodic noise.

[0036] When the air compressor is detected to be entering a surge state, the control unit starts the operation of the pipe diameter expansion device 21 to increase the diameter of the intake passage 2 and increase the intake flow rate; it also controls the electric valve 31 to increase the valve opening, reduce the discharge pressure, and increase the intake flow rate. The two work together to ensure that the air compressor quickly gets out of the surge state and avoids damage to the air compressor components.

[0037] By implementing the embodiments of the present invention, the operating status of the air compressor can be monitored in real time using noise and vibration signals. This allows for timely identification of air compressor surge and timely removal of the air compressor from surge by using the pipe diameter expansion device 21 and the electric valve 31. This avoids damage to the air compressor components, ensures the reliability and stability of the air compressor operation, and extends the service life of the air compressor.

[0038] Reference Figure 2 This invention also provides a control method for an air compressor, wherein the air compressor is the one described in the above embodiments, which has been described in detail in the above embodiments, and will not be repeated here for the sake of brevity. The flowchart of the control method is shown below. Figure 2 As shown, it includes steps S110-S130.

[0039] S110. Obtain the noise signal change curve of the noise collector and the vibration signal change curve of the vibration collector.

[0040] In this embodiment, the control unit is a host computer. The host computer collects noise signals from the noise collection device and vibration signals from the vibration collection device in real time, and processes the multiple noise and vibration signals according to time-domain changes to obtain the noise signal change curve and the vibration signal change curve, respectively. The noise signal change curve represents the noise change during the operation of the air compressor, and the vibration signal change curve represents the vibration change during the operation of the air compressor.

[0041] S120. Perform time-domain analysis on the noise signal change curve and the vibration 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 noise signal change curve of the noise collection device and the vibration signal change curve of the vibration collection device. 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 changes in noise and vibration signals, 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 escape 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-S123.

[0044] S121. Determine whether abnormal fluctuations occur in the noise signal change curve;

[0045] S122. If abnormal fluctuations occur in the noise signal change curve, determine whether abnormal fluctuations occur in the vibration signal change curve.

[0046] S123. If abnormal fluctuations occur in the vibration signal change curve, it is determined that the air compressor has entered a surge state.

[0047] In this embodiment, abnormal fluctuations in the noise and vibration signal curves are identified to determine whether the air compressor has entered a surge state. Abnormal fluctuations are characterized by spikes in the curves; 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 noise signal curve of the air compressor is checked for abnormal fluctuations; if abnormal fluctuations are found, the vibration signal curve of the air compressor is then checked for abnormal fluctuations; if abnormal fluctuations are found, it indicates that the air compressor is in a surge state. Thus, by using two different parameters for comprehensive evaluation, the accuracy of surge identification is ensured, avoiding misjudgments and subsequent miscontrols, and preventing impacts on work efficiency.

[0048] In one embodiment, such as Figure 4 As shown, step S121 further includes steps S1211-S1214.

[0049] S1211. Calculate the area of ​​the previous period in the noise signal variation curve;

[0050] S1212. Calculate the area of ​​the current period in the noise signal variation curve;

[0051] S1213. Determine whether the area of ​​the current period in the noise signal change curve is greater than the product of the area of ​​the previous period and the budget coefficient;

[0052] S1214. If the area of ​​the current period in the noise signal change curve is greater than the product of the area of ​​the previous period and the budget coefficient, then it is determined that there is an abnormal fluctuation in the noise signal change curve.

[0053] In this embodiment, the process first determines whether a peak appears in the noise signal change curve corresponding to the air compressor noise. Specifically, the area of ​​the previous period in the noise signal change curve is calculated by performing a definite integral on the noise signal change curve to obtain the area of ​​the noise time domain value change curve from (t-1) to t, which is s0, where (t-1) to t represents the previous period and s0 represents the area of ​​the previous period. Then, the area of ​​the current period in the noise signal change curve is calculated by performing a definite integral on the noise signal change curve to obtain the area from t to (t+1), which is s1, where t to (t+1) represents the current period and s1 represents the area of ​​the current period. Finally, the product of the area of ​​the current period and the area of ​​the previous period with a preset coefficient is compared. The preset coefficient is 8, but it can be other values. That is, if s1 > 8s0, it indicates that a peak appears in the noise signal change curve corresponding to the air compressor noise, and the air compressor noise has fluctuated abnormally.

[0054] In one embodiment, such as Figure 5 As shown, step S122 further includes steps S1221-S1224.

[0055] S1221. Calculate the area of ​​the previous cycle in the vibration signal variation curve;

[0056] S1222. Calculate the area of ​​the current period in the vibration signal change curve;

[0057] S1223. Determine whether the area of ​​the current cycle in the vibration signal change curve is greater than the product of the area of ​​the previous cycle and the budget coefficient;

[0058] S1224. If the area of ​​the current period in the vibration signal change curve is greater than the product of the area of ​​the previous period and the budget coefficient, then it is determined that there is an abnormal fluctuation in the vibration signal change curve.

[0059] In this embodiment, after identifying abnormal fluctuations in the air compressor noise, further judgment is made regarding whether abnormal fluctuations in the air compressor vibration are present in order to further identify the surge state. First, it is determined whether there are peaks in the vibration signal change curve corresponding to the air compressor vibration. Specifically, the area of ​​the previous cycle in the vibration signal change curve is calculated by performing a definite integral on the vibration signal change curve, resulting in the area of ​​the vibration time-domain value change curve from (t-1) to t, denoted as s0, where (t-1) to t represents the previous cycle, and s0 represents the area of ​​the previous cycle. Then, the area of ​​the current cycle in the vibration signal change curve is calculated by performing a definite integral on the vibration signal change curve, resulting in the area from t to (t+1), denoted as s1, where t to (t+1) represents the current cycle, and s1 represents the area of ​​the current cycle. Finally, the area of ​​the current cycle is compared with the product of the area of ​​the previous cycle and the budget coefficient. The preset coefficient is 8, but it can be other values. That is, it is determined that s1 > 8s0. If so, it means that there is a peak in the vibration signal change curve corresponding to the air compressor vibration, and the air compressor vibration has fluctuated abnormally. It can be seen that both the air compressor vibration and air compressor noise parameters have fluctuated abnormally, which can ensure that the air compressor is indeed in a surge state, thereby improving the accuracy of identification.

[0060] S130. If the air compressor enters a surge state, the pipe diameter expansion device is controlled to expand the diameter and the opening of the electric valve is increased.

[0061] 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 pipe expansion device and the electric valve. The expansion device increases the pipe diameter, thus increasing the intake channel diameter and intake flow rate. The electric valve is also controlled to increase its opening, thereby reducing exhaust pressure and increasing intake volume. These two actions work together to ensure the air compressor quickly recovers from the surge state, preventing damage to compressor components and improving the reliability of the air compressor's operation.

[0062] 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 noise signal D from the noise collector, the vibration signal F from the vibration collector, and the opening degree K of the electric valve are acquired. D, F, 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 (D, F, and K), P represents the adjusted parameters, and q is the adjustment margin. q is determined by the diameter of the intake channel and the diameter of the expansion device. Specifically, the diameter of the intake channel and the diameter of the expansion device are normalized based on the intake channel. After normalization, the diameter of the intake channel is 1, and the diameter of the expansion device is q. The acquired noise signal, vibration signal, and electric valve opening are adjusted according to the preset adjustment amount. Air compressor surge is identified based on the adjusted voltage signal. After identification, the opening degree of the electric valve is controlled based on the adjusted opening degree. This ensures that the air compressor can detect surge in advance and execute control actions accordingly, enabling it to operate efficiently and without the risk of surge, thus guaranteeing both compression efficiency and operational safety.

[0063] Figure 6 This is a schematic block diagram of a control device 200 for an air compressor provided in an embodiment of the present invention. Figure 6 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 6 The control device 200 of the air compressor includes an acquisition unit 201, a judgment unit 202, and a control unit 203.

[0064] The acquisition unit 201 is used to acquire the noise signal change curve of the noise collector and the vibration signal change curve of the vibration collector; the judgment unit 202 is used to perform time-domain analysis on the noise signal change curve and the vibration signal change curve to determine whether the air compressor has entered a surge state; the control unit 203 is used to control the pipe diameter expansion device to expand the diameter and increase the opening degree of the electric valve if the air compressor enters a surge state.

[0065] In some embodiments, such as this embodiment, the judgment unit 202 includes a first judgment subunit, a second judgment subunit, and a determination unit.

[0066] The first judgment subunit is used to judge whether abnormal fluctuations occur in the noise signal change curve; the second judgment subunit is used to judge whether abnormal fluctuations occur in the vibration signal change curve if abnormal fluctuations occur in the noise signal change curve; and the determination unit is used to determine that the air compressor has entered a surge state if abnormal fluctuations occur in the vibration signal change curve.

[0067] In some embodiments, such as this one, the first determination subunit includes a first calculation unit, a second calculation unit, a first area determination unit, and a first judgment subunit.

[0068] The system includes a first calculation unit for calculating the area of ​​the current period in the noise signal variation curve; a second calculation unit for calculating the area of ​​the previous period in the noise signal variation curve; a first area judgment unit for judging whether the area of ​​the current period in the noise signal variation curve is greater than the product of the area of ​​the previous period and the budget coefficient; and a first determination subunit for judging that abnormal fluctuations have occurred in the noise signal variation curve if the area of ​​the current period in the noise signal variation curve is greater than the product of the area of ​​the previous period and the budget coefficient.

[0069] In some embodiments, such as this embodiment, the second determination subunit includes a third calculation unit, a fourth calculation unit, a second area determination unit, and a second determination subunit.

[0070] The third calculation unit is used to calculate the area of ​​the current cycle in the vibration signal change curve; the fourth calculation unit is used to calculate the area of ​​the previous cycle in the vibration signal change curve; the second area judgment unit is used to determine whether the area of ​​the current cycle in the vibration signal change curve is greater than the product of the area of ​​the previous cycle and the budget coefficient; the second determination subunit is used to determine that abnormal fluctuations have occurred in the vibration signal change curve if the area of ​​the current cycle in the vibration signal change curve is greater than the product of the area of ​​the previous cycle and the budget coefficient.

[0071] The control device for the aforementioned air compressor can be implemented as a computer program, which can, for example... Figure 7 It is running on the air compressor shown.

[0072] Please see Figure 7 , Figure 7 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 compression unit, an air intake passage, an exhaust passage, and a control unit.

[0073] See Figure 7 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.

[0074] 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.

[0075] The processor 302 provides computing and control capabilities to support the operation of the entire air compressor 300.

[0076] 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.

[0077] This network interface 305 is used for network communication with other devices. Those skilled in the art will understand that... Figure 7 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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: An air compression unit includes an air compressor body, a noise collector, and a vibration collector disposed on the air compressor body. The noise collector is used to collect noise signals from the air compressor body, and the vibration collector is used to collect vibration signals from the air compressor body. An air intake passage is connected to the air intake port of the air compressor body, and the air intake passage is provided with a pipe diameter expansion device for adjusting the pipe diameter of the air intake passage; An exhaust passage is connected to the exhaust port of the air compressor body, and an electric valve for controlling the exhaust pressure and intake air volume is provided on the exhaust passage; The control unit is connected to the noise collector, the vibration collector, and the electric valve; The control unit is used to collect noise signals from the noise collector and vibration signals from the vibration collector to monitor whether the air compressor has entered a surge state. When both the noise signal change curve and the vibration signal change curve show abnormal fluctuations, indicating that the air compressor has entered a surge state, the control unit controls the pipe diameter expansion device to expand the pipe diameter and increases the opening of the electric valve.

2. The air compressor according to claim 1, characterized in that, The air compression unit also includes a soundproof enclosure that covers the air compressor body and the noise collector.

3. The air compressor according to claim 1 or 2, characterized in that, The air compressor also includes an air filter, which is located on the intake side of the intake 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 noise signal variation curve of the noise collector and the vibration signal variation curve of the vibration collector; To determine whether the air compressor has entered a surge state, it is necessary to judge whether both the noise signal change curve and the vibration signal change curve show abnormal fluctuations. If the air compressor enters a surge state, the pipe diameter expansion device is controlled to expand the diameter and 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 noise signal change curve includes: Calculate the area of ​​the previous period in the noise signal variation curve; Calculate the area under the current period in the noise signal variation curve; Determine whether the area of ​​the current period in the noise signal variation curve is greater than the product of the area of ​​the previous period and the budget coefficient; If the area of ​​the current period is greater than the product of the area of ​​the previous period and the budget coefficient, then it is determined that there is an abnormal fluctuation in the noise signal change curve.

6. The control method according to claim 4, characterized in that, The step of determining whether abnormal fluctuations occur in the vibration signal change curve includes: Calculate the area of ​​the previous cycle in the vibration signal variation curve; Calculate the area under the current period in the vibration signal variation curve; Determine whether the area of ​​the current cycle in the vibration signal change curve is greater than the product of the area of ​​the previous cycle and the budget coefficient; If the area of ​​the current cycle is greater than the product of the area of ​​the previous cycle and the budget coefficient, then it is determined that there is an abnormal fluctuation in the vibration signal change curve.

7. A control device for an air compressor, characterized in that, include: The acquisition unit is used to acquire the noise signal variation curve of the noise collector and the vibration signal variation curve of the vibration collector. The judgment unit is used to determine whether both the noise signal change curve and the vibration signal change curve show abnormal fluctuations in order to determine whether the air compressor has entered a surge state. The control unit is used to control the pipe expansion device to expand the pipe diameter and increase the opening degree 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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