Self-adaptive expansion silencer for pipeline of compressor and control method of self-adaptive expansion silencer

Abstract

The invention discloses a compressor pipeline self-adaptive expansion silencer and a control method thereof.The compressor pipeline self-adaptive expansion silencer comprises a compressor body, the compressor body is connected with a self-adaptive expansion cavity through a compressor gas conveying pipe, the self-adaptive expansion cavity can change the length of the cavity and the sectional area of the cavity, and a sensor integration module is arranged in the compressor gas conveying pipe; the sensor integration module is connected with a central processing unit and a water circulation hub, the water circulation hub is connected with the self-adaptive expansion cavity, and the water circulation hub, the sensor integration module and the self-adaptive expansion cavity are all in communication connection with the central processing unit. The invention has the characteristics of automatically adjusting the silencing frequency of the expansion cavity and automatically adjusting the transmission loss of the expansion cavity.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor silencing, and in particular relates to a compressor pipeline adaptive expansion silencing device and a control method thereof. Background Art

[0002] In the field of mechanical engineering, especially in the field of fluid mechanical equipment design, compressors play an important role. The main function of a compressor is to increase low-pressure gas to high-pressure gas to meet various process requirements. However, compressors face a significant challenge during operation: due to the impact and vibration of the refrigerant, they often generate a lot of noise, which not only affects the working environment, but may also endanger the health of operators. Therefore, how to effectively reduce the refrigerant vibration and noise of the compressor while improving its operating efficiency and stability has always been an important research topic in this field.

[0003] Currently, the solutions to this problem can be divided into two categories:

[0004] 1. Structural improvement: Reduce the impact and vibration of the refrigerant by improving the design and structure of the compressor. For example, changing the cylinder shape, piston shape, inlet and outlet design, etc. of the compressor can reduce the vibration noise of the compressor to a certain extent. This method directly reduces the generation of noise from the source.

[0005] 2. Expansion chamber application: Use a fixed-size expansion chamber to reduce noise. This method adapts to the fixed-size expansion chamber by controlling the state and parameters of the process in the compressor. Although this method can reduce the noise of the compressor, it often sacrifices part of the compressor's performance.

[0006] In recent years, some innovative solutions have been proposed:

[0007] 1. Air conditioner noise reduction control method: The Chinese invention patent "Air conditioner noise reduction control method, device, air conditioner and storage medium" proposes a method for identifying and controlling compressor transmission sound by analyzing noise frequency domain data. This method adjusts the opening of the electronic expansion valve and the flow rate of the refrigerant in the pipeline so that the effective silencer range of the muffler can include the characteristic peak of the compressor transmission sound, thereby improving the noise reduction capability. However, although this method improves the noise reduction capability of the air conditioner, it may sacrifice the performance of the compressor.

[0008] 2. Automobile noise reduction structure: China's invention patent "An automobile noise reduction structure, automobile air conditioning system and automobile" proposes a specially designed expansion muffler. The muffler achieves the effect of reducing both the dynamic pulsation transmitted from the compressor to the pipeline and the internal pulsation by precisely controlling the size ratio of the expansion chamber and the air conditioning pipe, as well as the distance from the expansion chamber to the compressor. This design not only reduces the vibration noise in the car caused by the electric compressor, but also reduces the size of the muffler, without the need for additional fixing brackets, thereby reducing costs while ensuring the noise reduction effect.

[0009] However, existing technologies still have some limitations:

[0010] 1. Trade-off between performance and noise reduction: Many noise reduction solutions may affect the performance of the compressor while reducing noise.

[0011] 2. Fixed size limitation: Current expansion mufflers are usually of fixed size and fixed center frequency, and cannot be adjusted according to the actual problem frequency. This results in the expansion cavity of different compressor pipelines needing to be redesigned and molded, increasing manufacturing costs.

[0012] In view of the above background, it is particularly important to develop an expansion muffler device that can automatically adapt to the problem frequency of the compressor. Such a device should be able to flexibly adjust to different noise frequencies without affecting the performance of the compressor, thereby improving the noise reduction effect while reducing the manufacturing and adaptation costs. Summary of the invention

[0013] The invention discloses a pipeline adaptive expansion silencing device of a compressor and a control method thereof, which has the characteristics of automatically adjusting the silencing frequency of an expansion cavity and automatically adjusting the transmission loss of the expansion cavity.

[0014] The present invention discloses a pipeline adaptive expansion silencing device for a compressor, comprising a compressor body, wherein the compressor body is connected to an adaptive expansion cavity through a compressor air pipe and can change the cavity length and the cavity cross-sectional area, a sensor integrated module is arranged in the compressor air pipe, the sensor integrated module is connected to a central processing unit and a water circulation hub, the water circulation hub is connected to the adaptive expansion cavity, and the water circulation hub, the sensor integrated module and the adaptive expansion cavity are all communicatively connected to the central processing unit.

[0015] In a preferred embodiment of the present invention, the adaptive expansion chamber includes an expansion chamber outer cavity, an upper chamber and a lower chamber are arranged in the expansion chamber outer cavity, the upper chamber is provided with a slide with a guide rail that can be moved up and down, and the lower chamber is provided with a retractable slide with a guide rail that can move forward and backward, the retractable slide with a guide rail can be displaced axially along the lower chamber and can be retracted radially along the lower chamber, the upper chamber is connected to a water circulation hub through a first pipeline, and the lower chamber is respectively connected to a compressor body and a water circulation hub through a compressor air pipe and a second pipeline, and the water circulation hub, the sensor integrated module, and the retractable slide with a guide rail are all communicatively connected to the central processing unit.

[0016] In a preferred embodiment of the present invention, the slide plate with guide rails and the telescopic slide plate with guide rails are arranged perpendicular to each other.

[0017] In a preferred embodiment of the present invention, the retractable slide plate with guide rails is connected to a retractable air pipe that can move forward and backward.

[0018] In a preferred embodiment of the present invention, the sensor integrated module includes a vibration sensor and a flow sensor.

[0019] In a preferred embodiment of the present invention, the water circulation hub includes a water delivery pump, a liquid storage tank and a liquid delivery pipeline.

[0020] The present invention also discloses a control method for a pipeline adaptive expansion silencer, which includes collecting a vibration signal of a compressor air pipe; determining the same-frequency vibration peak values ​​that appear at all orders in the vibration signal, determining the peak starting frequency value and the ending frequency value, and calculating the center frequency; collecting a flow signal inside the air pipe, and calculating the flow velocity information based on the cross-sectional area of ​​the air pipe; calculating the effective length of the adaptive expansion cavity based on the center frequency and the flow velocity information according to the pipeline acoustics theory; calculating the expansion ratio of the adaptive expansion cavity based on the difference between the vibration peak value and the target value, and inferring the effective cross-sectional area of ​​the adaptive expansion cavity from the expansion ratio; and controlling the water circulation hub to adjust the cavity length and cross-sectional area of ​​the adaptive expansion cavity based on the calculated effective length and effective cross-sectional area of ​​the adaptive expansion cavity.

[0021] In a preferred embodiment of the present invention, specific dimensional parameters under a specific cross-sectional form are calculated based on the effective cross-sectional area of ​​the adaptive expansion cavity; when a rectangular cross-section is adopted, the cross-sectional length is calculated; when a circular cross-section is adopted, the cross-sectional radius is calculated.

[0022] In a preferred embodiment of the present invention, the vibration signal and flow signal of the compressor air pipe are collected by a sensor integrated module; the signal processing and parameter calculation are performed by a central processing unit; and according to the calculation results, the water circulation hub is controlled to transport a specific amount of liquid to the adaptive expansion chamber to adjust the cavity length and cross-sectional area of ​​the adaptive expansion chamber.

[0023] In a preferred embodiment of the present invention, the cavity length of the adaptive expansion cavity is adjusted by a slide with guide rails that can be moved up and down; the cross-sectional area of ​​the adaptive expansion cavity is adjusted by a slide with guide rails that can be moved forward and backward and is retractable; wherein, the slide with guide rails that can move up and down and the retractable slide with guide rails are arranged perpendicular to each other to achieve axial and radial adjustment of the adaptive expansion cavity.

[0024] The beneficial effects of the present invention are as follows: First, the present invention achieves accurate adaptation and elimination of noises of different frequencies by adopting an adaptive expansion cavity that can change the length of the cavity itself and the cross-sectional area of ​​the cavity. This adaptive capability enables the device to effectively cope with noises of various frequencies generated by the compressor under different working conditions, greatly improving the effect and scope of application of noise reduction. Compared with the traditional fixed-size expansion cavity, the adaptive characteristics of the present invention significantly improve the flexibility and versatility of the silencer.

[0025] Secondly, the present invention constructs an intelligent closed-loop control system through an integrated sensor module, a central processor and a water circulation hub. This system can monitor the vibration and flow signals of the compressor in real time, quickly calculate the optimal expansion chamber parameters, and accurately adjust the size of the expansion chamber through the water circulation system. This intelligent control method not only improves the accuracy and efficiency of noise reduction, but also can respond to changes in the working state of the compressor at any time to maintain the best noise reduction effect.

[0026] Furthermore, the design of the present invention cleverly utilizes the water circulation system to adjust the size of the expansion chamber, avoiding a complex mechanical structure and improving the reliability and durability of the system. At the same time, this design also makes the adjustment process of the device more stable and will not interfere with the normal operation of the compressor.

[0027] In addition, the control method of the present invention ensures the noise reduction effect while minimizing the impact on the compressor performance by accurately calculating the effective length and cross-sectional area of ​​the expansion chamber. This solves the contradiction between performance and noise reduction in traditional noise reduction methods and achieves a win-win situation for noise reduction and performance.

[0028] Finally, the adaptive characteristics of the present invention enable the same device to be applied to compressors of different types and specifications, greatly reducing the manufacturing and adaptation costs. This not only saves development and production costs for enterprises, but also provides users with a more economical and affordable noise reduction solution.

[0029] The adaptive expansion silencer and control method thereof provided by the present invention effectively solve the compressor noise problem through intelligent and adaptive design, while taking into account the balance between performance and cost, and bringing an innovative solution to the noise reduction technology of the compressor industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0031] Figure 1 is a flow chart of the method of the present invention;

[0032] Figure 2 It is a schematic diagram of the pipeline adaptive expansion silencing device of the compressor of the present invention;

[0033] Figure 3 A schematic diagram of the adaptive expansion chamber of the present invention;

[0034] Figure 4 It is a schematic diagram of the telescopic gas transmission pipe of the present invention;

[0035] Figure 5 This is a schematic diagram of a retractable slide plate with guide rails according to the present invention;

[0036] Figure 6 It is an axial view of the adaptive expansion chamber body of the present invention. DETAILED DESCRIPTION

[0037] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] like Figures 1 to 6 As shown, this embodiment provides a compressor pipeline adaptive expansion silencing device, which is mainly composed of a compressor body 6, a compressor air pipe 5, an adaptive expansion chamber 4, a sensor integrated module 1, a central processing unit 2 and a water circulation hub 3.

[0040] The compressor body 6 is connected to the adaptive expansion chamber 4 through the compressor air pipe 5. A sensor integrated module 1 is arranged in the compressor air pipe 5, and the module includes a vibration sensor and a flow sensor. The sensor integrated module 1 is connected to the central processor 2 and the water circulation hub 3, and is used to collect vibration and flow data of the compressor in real time when it is running.

[0041] The adaptive expansion chamber 4 is the core component of the device, which can change its own cavity length and cross-sectional area according to actual needs. The adaptive expansion chamber 4 includes an expansion cavity outer cavity 41, which is divided into an upper chamber and a lower chamber. The upper chamber is provided with a slide 42 with a guide rail that can be moved up and down to adjust the length of the cavity; the lower chamber is provided with a slide 43 with a guide rail that can be moved forward and backward and is retractable to adjust the cross-sectional area of ​​the cavity. The two slides are arranged perpendicular to each other to ensure flexible adjustment of the cavity in the axial and radial directions.

[0042] The retractable slide plate 43 with guide rails is connected to a retractable air pipe 44 that can move forward and backward. This design enables the lower chamber to change shape as the slide plate moves, thereby adjusting the cross-sectional area. The upper chamber is connected to the water circulation hub 3 through the first pipeline, and the lower chamber is connected to the compressor body 6 and the water circulation hub 3 through the compressor air pipe 5 and the second pipeline respectively.

[0043] The water circulation hub 3 is a key component for realizing adaptive adjustment, and it includes a water delivery pump, a liquid storage tank and a liquid delivery pipeline. According to the instructions of the central processor 2, the water circulation hub 3 delivers a specific amount of liquid to the adaptive expansion chamber 4, thereby realizing precise adjustment of the length and cross-sectional area of ​​the chamber.

[0044] The central processor 2 is the brain of the whole system, and it maintains communication connection with the water circulation hub 3, the sensor integrated module 1 and the retractable slide plate with guide rail 43 of the adaptive expansion chamber 4. The central processor 2 receives data from the sensor, performs complex signal processing and parameter calculation, and then sends control instructions to the water circulation hub 3 and the adaptive expansion chamber 4.

[0045] The control method of this embodiment is as follows: First, the sensor integrated module 1 collects the vibration signal of the compressor gas pipeline 5. The central processor 2 analyzes these signals, determines the peak value of the same frequency vibration that appears in each order, determines the starting and ending frequency values ​​of the peak value, and calculates the center frequency. At the same time, the flow sensor collects the flow signal inside the gas pipeline and calculates the flow rate information in combination with the cross-sectional area of ​​the gas pipeline.

[0046] Next, the CPU 2 calculates the effective length required for the adaptive expansion chamber 4 based on the pipeline acoustic theory and the calculated center frequency and flow rate information. Then, based on the difference between the vibration peak value and the preset target value, the expansion ratio required for the adaptive expansion chamber 4 is calculated, and the effective cross-sectional area of ​​the adaptive expansion chamber 4 is deduced from this.

[0047] Finally, the central processor 2 sends a control instruction to the water circulation hub 3 according to the calculated effective length and effective cross-sectional area. The water circulation hub 3 then delivers a specific amount of liquid to the adaptive expansion chamber 4, and adjusts the length of the chamber by controlling the slide plate with guide rails 42 that can move up and down, and adjusts the cross-sectional area of ​​the chamber by controlling the slide plate with guide rails 43 that can move forward and backward and can be extended.

[0048] In this way, the adaptive expansion silencer of this embodiment can adjust the size parameters of the expansion chamber in real time according to the actual operating conditions of the compressor, thereby achieving the best noise reduction effect. At the same time, due to the use of a water circulation system for adjustment, the entire process is stable and reliable, and will not interfere with the normal operation of the compressor.

[0049] Embodiment 2:

[0050] This embodiment also provides a compressor pipeline adaptive expansion silencer device, the basic structure of which is similar to that of Embodiment 1, but with some innovations in the specific implementation method and control strategy.

[0051] In this embodiment, the adaptive expansion chamber 4 adopts a more sophisticated design. The expansion chamber outer cavity 41 is made of high-strength composite material, which has good pressure resistance and corrosion resistance. A flexible diaphragm is set between the upper chamber and the lower chamber, which can be deformed with the injection and withdrawal of liquid, further improving the accuracy of regulation.

[0052] The slide plate with guide rail 42 and the retractable slide plate with guide rail 43 both adopt a special waterproof sealing design to ensure that no liquid leakage occurs during long-term use. The retractable mechanism of the retractable slide plate with guide rail 43 adopts a multi-stage retractable design, which can achieve a wider range of cross-sectional area adjustment.

[0053] In addition to the vibration sensor and flow sensor, the sensor integrated module 1 also includes a temperature sensor and a pressure sensor. These additional sensors can provide more comprehensive operating data, which helps the central processor 2 to make more accurate judgments and adjustments.

[0054] The water circulation hub 3 is upgraded in this embodiment. In addition to the basic water delivery pump, liquid storage tank and liquid delivery pipeline, a heat exchanger is added. This heat exchanger can adjust the temperature of the circulating liquid, thereby maintaining the stability of the system in extreme temperature environments. In addition, the water circulation hub 3 is also equipped with a micro-purification system that can continuously purify the circulating liquid and extend the service life of the entire system.

[0055] The CPU 2 uses the latest embedded system with more powerful computing power and lower power consumption. It is also equipped with a machine learning algorithm that can continuously optimize the control strategy based on long-term operation data.

[0056] The control method of this embodiment is further optimized on the basis of embodiment 1:

[0057] First, the sensor integration module 1 simultaneously collects the vibration, flow, temperature and pressure signals of the compressor gas pipe 5. The central processor 2 performs a comprehensive analysis of these multi-dimensional data, not only determining the vibration peak value, but also considering the impact of temperature and pressure on acoustic characteristics.

[0058] When calculating the effective length of the adaptive expansion chamber 4, the central processor 2 not only considers the center frequency and flow velocity information, but also takes the temperature and pressure factors into consideration, and uses the modified pipeline acoustic theory for more accurate calculations.

[0059] When calculating the expansion ratio and effective cross-sectional area, the CPU 2 uses a dynamic optimization algorithm. This algorithm predicts possible changes in the future based on historical data and current status, thereby making more forward-looking adjustment decisions.

[0060] When controlling the water circulation hub 3 to adjust the adaptive expansion chamber 4, the central processor 2 will consider both the adjustment speed and accuracy. For rapidly changing noise, it will give priority to the adjustment speed; for stable noise, it will give priority to the adjustment accuracy. This flexible strategy can better adapt to different working environments.

[0061] The adaptive expansion silencer of this embodiment has significantly improved noise reduction effect, adaptability and reliability, providing a more comprehensive and efficient solution for compressor noise control.

[0062] It should be pointed out that when the vibration of the gas pipe end reaches a peak value at the same frequency of each order during the operation of the compressor, in addition to considering the component resonance factor, the vibration caused by the refrigerant pulsation should also be considered. After the micro-computer processor of the present invention obtains the vibration sensor signal of the compressor gas delivery aluminum pipe, the micro-computer processor obtains the theoretical size of the expansion cavity and converts it into the water injection volume of the water pump. The processor issues an instruction to control the water pump to inject water into the liquid storage cavity of the expansion muffler in real time, forcing the pressure surface pressure plate to move, thereby changing the expansion ratio of the expansion muffler and realizing automatic adjustment of the center frequency of the expansion muffler.

[0063] Therefore, the present invention solves the following technical problems:

[0064] First, the traditional expansion silencer can only solve the problem of a single fixed frequency and cannot adapt to different operating frequencies. If different operating frequencies appear, the expansion cavity must be redesigned and a new mold must be opened for manufacturing, which results in high manufacturing costs.

[0065] Second, within the frequency range of concern, the center frequency and transmission loss of the adaptive expansion silencer can be automatically adjusted, which can effectively attenuate the pulsation impact of the compressor refrigerant. It has the advantages of a wide range of applications and low manufacturing costs.

[0066] The control logic of the adaptive expansion muffler of the present invention is as follows:

[0067] Step 1: The vibration sensor collects the vibration signal of the compressor gas transmission hard pipe;

[0068] Step 2: The microcomputer processor determines the peak value of the same frequency vibration that appears in each order, the peak starting frequency value f0, the ending frequency value f1, and calculates its center frequency fm=(f0+f1) / 2;

[0069] Step 3: The flow sensor collects the flow signal A inside the gas pipeline, and uses the cross-sectional area S0 of the gas pipeline to calculate the flow rate information V=A / S0 by the microcomputer;

[0070] Step 4: Calculate the effective length of the expansion cavity L = 4fm / V based on pipeline acoustic theory;

[0071] Step 5: Based on the difference δ between the peak value and the target value obtained in "Step 2", i.e., the transmission loss, the expansion ratio m of the expansion cavity is obtained by reverse calculation, and the effective cross-sectional area of ​​the expansion cavity S1 = m*S0 is obtained by reverse calculation from the expansion ratio m; the calculation formula of the expansion ratio m is:

[0072]

[0073] Step 6: The cross-section can be ① rectangular cross-section: the cross-section width is fixed to L, and the cross-section length is measured to be H = S1 / L;

[0074] ②Circular cross section: The cross section radius is r = √(S1 / π); it can also be extended to other cross sections, which will not be expanded here;

[0075] Step 7, the microcomputer processor controls the water pump to quantitatively output liquid through the infusion tube according to the cross-sectional parameters in steps 4, 5, and 6 to adjust the cross-sectional area to the target cross-sectional area, adapting to the refrigerant pulsation center frequency fm and the transmission loss target δ;

[0076] At this point, the work of the pressure pulsation impact adaptive expansion cavity of a compressor gas pipeline has been completed.

[0077] The present invention is further explained below in conjunction with the accompanying drawings: Figure 2 As shown, Figure 2The main components of the adaptive expansion silencer are shown. The structure consists of the following parts: the sensor integrated module 1 is used to output the fluid flow and pipeline refrigerant impact vibration signals, the central processing unit 2 is used for sensor signal processing; center frequency judgment; expansion cavity size calculation and output), the water circulation hub 3 is used to store liquid, receive the central processing unit signal, quantitatively output liquid, and adjust the expansion cavity size, the adaptive expansion cavity 4 can change the cavity length and cavity cross-sectional area according to the liquid input of the water pump to adapt to the problem center frequency and transmission loss, the compressor air pipe 5 is used to realize the input and output of the fluid, and the compressor body 6 is used to reduce the temperature and low-pressure fluid and compress it into high-temperature and high-pressure fluid and output it.

[0078] like Figures 3 to 5 The figure shows the main components of the adaptive expansion chamber body. The structure consists of the following parts: an expansion chamber outer cavity 41, a slide plate with a guide rail 42 (which can move up and down to control the change of the expansion chamber cross section S1), a retractable slide plate with a guide rail 43 (which can control the change of the expansion chamber cross section and length), a retractable air pipe 44 (which can cooperate with the retractable slide plate with a guide rail 43 to adjust its own length), a guide rail fixing device 45 (which can connect the slide plate with a guide rail 42 and the retractable slide plate with a guide rail 43 and the retractable slide plate with a guide rail 43 can slide along the axis), an air pipe 46 (for the flow of compressor refrigerant), and a pipeline 47.

[0079] In the above technical solution, for a certain compressor under fixed flow output conditions, the control process of the adaptive expansion silencer is as follows:

[0080] Step 1: In the initial state, Figure 4 The positions of the middle guide rail slide 42 and the retractable guide rail slide 43 are at initial positions a1 and b1.

[0081] Step 2: When the compressor starts working, the central processor obtains the flow signal of the fluid through the sensor integrated module and converts it into flow velocity, and obtains the vibration signal of the gas pipe through the vibration sensor. When each order signal has a peak value of a fixed frequency and a certain order vibration exceeds the standard at the fixed frequency, the water pump starts working and enters step 3.

[0082] Step 3: The CPU obtains the center frequency of the refrigerant pulsation. At this time, the effective length L1 and effective cross-sectional area S1 of the expansion muffler can be obtained. Figure 4 The initial positions of the middle guide rail slide 42 and the telescopic guide rail slide 43 are determined by the amount of water injected or returned to reach the effective length L1 and the effective area S1.

[0083] Step 4, expansion chamber silencer adaptive change process: When the expansion silencer is initially expanded, Figure 3As shown, a1=b1=0, the central processor obtains the sensor signal, calculates the expansion chamber length and expansion chamber cross-sectional size corresponding to the output problem frequency, and the water pump starts working after receiving the signal. The first step is to inject water V1 into the auxiliary chamber I through the pipeline 7. After completion, the second step is to inject water V2 into the auxiliary chamber II. The calculation method of V1 and V2 is as follows:

[0084] V1=a2×b1×L; V2=a1×L×(b1+b2).

[0085] Figure 3 The retractable slide plate 43 with guide rails and the retractable air pipe 44 (moving parts) are adapted to the water volume.

[0086] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A compressor pipeline adaptive expansion silencer, characterized in that: The invention comprises a compressor body, which is connected to an adaptive expansion cavity through a compressor air pipe and can change the length of the cavity itself and the cross-sectional area of ​​the cavity. A sensor integrated module is arranged in the compressor air pipe, and the sensor integrated module is connected to a central processing unit and a water circulation hub. The water circulation hub is connected to the adaptive expansion cavity, and the water circulation hub, the sensor integrated module and the adaptive expansion cavity are all communicatively connected to the central processing unit.

2. The compressor pipeline adaptive expansion silencing device according to claim 1, characterized in that: The adaptive expansion chamber includes an expansion chamber outer cavity, an upper chamber and a lower chamber are arranged in the expansion chamber outer cavity, the upper chamber is provided with a slide plate with a guide rail that can be moved up and down, and the lower chamber is provided with a retractable slide plate with a guide rail that can move forward and backward, the retractable slide plate with a guide rail can be displaced axially along the lower chamber and can be retracted radially along the lower chamber, the upper chamber is connected to a water circulation hub through a first pipeline, and the lower chamber is respectively connected to a compressor body and a water circulation hub through a compressor air pipe and a second pipeline, and the water circulation hub, the sensor integrated module, and the retractable slide plate with a guide rail are all communicatively connected to the central processing unit.

3. The compressor pipeline adaptive expansion silencer according to claim 2, characterized in that: The slide plate with guide rails and the telescopic slide plate with guide rails are arranged perpendicular to each other.

4. The compressor pipeline adaptive expansion silencer according to claim 2, characterized in that: The retractable slide plate with guide rails is connected with a retractable air delivery pipe which can move forward and backward.

5. The compressor pipeline adaptive expansion silencer according to claim 1, characterized in that: The sensor integrated module includes a vibration sensor and a flow sensor.

6. The compressor pipeline adaptive expansion silencer according to claim 1, characterized in that: The water circulation hub comprises a water delivery pump, a liquid storage tank and a liquid delivery pipeline.

7. A control method for the pipeline adaptive expansion silencer of the compressor according to any one of claims 1 to 6, characterized in that: Collect the vibration signal of the compressor air pipe; determine the same-frequency vibration peaks that appear in all orders in the vibration signal, determine the peak starting frequency and ending frequency values, and calculate the center frequency; collect the flow signal inside the air pipe, and calculate the flow velocity information based on the cross-sectional area of ​​the air pipe; according to the pipeline acoustics theory, use the center frequency and flow velocity information to calculate the effective length of the adaptive expansion cavity; calculate the expansion ratio of the adaptive expansion cavity based on the difference between the vibration peak value and the target value, and deduce the effective cross-sectional area of ​​the adaptive expansion cavity from the expansion ratio; based on the calculated effective length and effective cross-sectional area of ​​the adaptive expansion cavity, control the water circulation hub to adjust the cavity length and cross-sectional area of ​​the adaptive expansion cavity.

8. The control method according to claim 7, characterized in that: According to the effective cross-sectional area of ​​the adaptive expansion cavity, the specific size parameters under the specific cross-sectional form are calculated; when a rectangular cross-section is adopted, the cross-sectional length is calculated; when a circular cross-section is adopted, the cross-sectional radius is calculated.

9. The control method according to claim 7, characterized in that: The vibration signal and flow signal of the compressor air pipe are collected through the sensor integrated module; the signal processing and parameter calculation are performed by the central processing unit; according to the calculation results, the water circulation hub is controlled to transport a specific amount of liquid to the adaptive expansion cavity to adjust the cavity length and cross-sectional area of ​​the adaptive expansion cavity.

10. The control method according to claim 7, characterized in that: The cavity length of the adaptive expansion cavity is adjusted by a slide with guide rails that can be moved up and down; the cross-sectional area of ​​the adaptive expansion cavity is adjusted by a slide with guide rails that can be moved forward and backward and is retractable; wherein, the slide with guide rails that can move up and down and the retractable slide with guide rails are arranged perpendicular to each other to realize the axial and radial adjustment of the adaptive expansion cavity.

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