Compressor and control method thereof

Abstract

The invention relates to a compressor and a control method of the compressor, the compressor comprises a pump body assembly, the pump body assembly comprises a first-stage compression part, an intermediate-stage compression part and a second-stage compression part which communicate in sequence, and the exhaust end of the first-stage compression part communicates with the air inlet end of the second-stage compression part through the intermediate-stage compression part; the silencing assembly is arranged on the intermediate-stage compression part; the silencing assembly comprises a detection element, a containing space and an adjusting plate, the detection element is arranged to detect pressure information of the containing space, and the adjusting plate divides the containing space into a first silencing space and a second silencing space; the adjusting plate can move in the containing space so as to change the volume of the first silencing space. The volume of the silencing space is adjusted through pressure information, then the inherent frequency of the silencing space is adjusted, vibration sound energy is absorbed through airflow resonance, and exhaust pulsation is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a compressor and a control method thereof. Background Art

[0002] As a common compression device, the working principle of screw compressor relies on the rotation of the screw rotor in the compressor housing to achieve the suction, compression and discharge of gas. However, during the operation of the screw compressor, the periodic connection between the compression chamber and the suction and exhaust chambers has become an issue that cannot be ignored.

[0003] As the screw rotor rotates, the volume of the compression chamber changes continuously, and the compression chamber is periodically connected to the suction and exhaust chambers, causing unstable gas flow inside the compressor, which in turn causes air flow pulsation in the suction and exhaust chambers. Air flow pulsation intensifies the vibration and noise in the suction and exhaust chambers, which has an adverse effect on the stable operation of the equipment and the surrounding environment.

[0004] In addition, during the exhaust process, the screw compressor has the problem of over-compression or under-compression due to the unstable exhaust pressure. In the exhaust chamber, the air flow pulsation interacts with the over-compression or under-compression phenomenon, inducing more serious noise problems, which not only affects the performance of the equipment, but also poses a potential threat to the health of the operators.

[0005] For a single-machine two-stage screw compressor, the compression process is divided into two stages, such as primary exhaust and secondary exhaust, which improves the compression efficiency. However, the above method will aggravate the problem of exhaust airflow pulsation. Among them, the secondary exhaust is the final exhaust port of the compressor, and its exhaust pressure, exhaust temperature and other exhaust conditions are relatively fixed, and there are a variety of effective silencing measures to reduce the noise level. However, the situation of the first-stage exhaust (that is, the first-stage exhaust or the process as the second-stage suction) is more complicated. It is affected by many uncertain factors such as user load and intermediate air replenishment status, resulting in large fluctuations in the pressure, temperature and other parameters of the first-stage exhaust. The noise problem of the first-stage exhaust is difficult to be effectively solved by conventional noise reduction and silencing measures. Summary of the invention

[0006] The present application provides a compressor and a control method thereof, which can solve the noise and vibration problems caused by the pulsation of the first-stage exhaust gas flow and improve the performance of the compressor.

[0007] In a first aspect, the present application provides a compressor, comprising:

[0008] The pump body assembly comprises a first-stage compressor, an intermediate-stage compressor and a second-stage compressor which are connected in sequence, wherein the exhaust end of the first-stage compressor is connected to the intake end of the second-stage compressor through the intermediate-stage compressor; and

[0009] A silencer assembly is arranged in the intermediate stage compression part; the silencer assembly includes a detection element, a accommodating space and an adjustment plate, the detection element is arranged to detect the pressure information of the accommodating space, and the adjustment plate divides the accommodating space into a first silencer space and a second silencer space; wherein the adjustment plate can move within the accommodating space to change the volume of the first silencer space.

[0010] In a possible implementation, the silencer assembly includes a silencer body, the interior of the silencer body is a hollow structure, and the hollow structure is constructed as the accommodating space; wherein the adjustment plate is slidably connected to the silencer body.

[0011] In a possible implementation, the muffler is provided with a plurality of vents, and the vents are communicated with the intermediate-stage compression part;

[0012] Wherein, the vent is communicated with the first silencing space.

[0013] In a possible implementation, the silencer is provided with a liquid inlet and a liquid outlet, the liquid inlet is connected to the second silencer space and the exhaust end of the second-stage compression part, and the liquid outlet is connected to the second silencer space and the air inlet end of the first-stage compression part.

[0014] In a possible implementation, the liquid inlet end is provided with a first valve, and the liquid outlet end is provided with a second valve.

[0015] In a possible implementation manner, the adjustment plate and the inner side wall of the accommodating space are sealed.

[0016] In a possible implementation manner, the detection element includes a pressure sensor.

[0017] In a second aspect, the present application provides a compressor control method, which is applied to the compressor as described in the first aspect, and the compressor control method includes:

[0018] Obtaining a first pressure value of the first silencing space;

[0019] Acquire a second pressure value of the second anechoic space;

[0020] Based on the first pressure value and the second pressure value, a position of the adjustment plate in the accommodating space is determined.

[0021] In a possible implementation, determining the position of the adjustment plate in the accommodating space based on the first pressure value and the second pressure value includes:

[0022] determining pressure information according to the first pressure value and the second pressure value;

[0023] Determining the volume of the first silencing space and / or the second silencing space according to the pressure information;

[0024] The position of the adjustment plate in the accommodating space is determined based on the volume of the first silencing space and / or the second silencing space.

[0025] In a possible implementation manner, determining the position of the adjustment plate in the accommodating space includes:

[0026] Opening the first valve to connect the second muffler space with the exhaust end of the second-stage compression part; and / or,

[0027] The second valve is opened to connect the second muffler space with the air inlet end of the first-stage compression part.

[0028] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the volume of the silencer space is adjusted through pressure information, thereby adjusting the natural frequency of the silencer space, absorbing vibration and sound energy through airflow resonance, and reducing exhaust pulsation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0032] Figure 1 A schematic diagram of a compressor provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of a muffler assembly provided in an embodiment of the present application;

[0034] Figure 3 A flow chart of a method for controlling a compressor provided in an embodiment of the present application;

[0035] Figure 4 A flow chart of a method for controlling a compressor provided in an embodiment of the present application;

[0036] Figure 5 A flow chart of a method for controlling a compressor provided in an embodiment of the present application;

[0037] Figure 6 A flow chart of a method for controlling a compressor provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. Pump body assembly; 11. First-stage compression part; 12. Intermediate-stage compression part; 13. Second-stage compression part; 14. Motor; 2. Silencer assembly; 21. Detection element; 22. Accommodation space; 221. First silencing space; 222. Second silencing space; 23. Adjustment plate; 24. Silencer body; 241. Vent; 242. Liquid inlet end; 2421. First valve; 243. Liquid outlet end; 2431. Second valve. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0043] In order to solve the above technical problems, the present application provides a compressor, including a pump body assembly and a muffler assembly, wherein the pump body assembly includes a first-stage compression part, an intermediate-stage compression part and a second-stage compression part connected in sequence, and the exhaust end of the first-stage compression part is connected to the intake end of the second-stage compression part through the intermediate-stage compression part; the muffler assembly is arranged in the intermediate-stage compression part; the muffler assembly includes a detection element, a accommodating space and an adjustment plate, the detection element is arranged to detect the pressure information of the accommodating space, and the adjustment plate separates the accommodating space into a first muffler space and a second muffler space; wherein the adjustment plate can move in the accommodating space to change the volume of the first muffler space. The volume of the muffler space is adjusted by the pressure information, and then the natural frequency of the muffler space is adjusted, and the vibration sound energy is absorbed by the airflow resonance, the exhaust pulsation is reduced, and the intermediate-stage exhaust airflow noise of different frequencies is eliminated.

[0044] In some exemplary embodiments, Figure 1 , Figure 2 As shown, a compressor, such as a screw compressor, is used in a refrigeration device to achieve heat exchange, evaporation or braking of the refrigeration device. The refrigeration device is, for example, an air conditioner to meet the user's cooling or heating needs.

[0045] The compressor includes a pump body assembly 1 and a silencer assembly 2. The silencer assembly 2 is installed in the pump body assembly 1 to reduce the airflow noise of the pump body assembly 1, achieve silence of the pump body assembly 1, and improve the overall performance of the compressor.

[0046] In this embodiment, if Figure 1 , Figure 2As shown, the pump body assembly 1 includes, for example, a first-stage compressor 11, an intermediate-stage compressor 12, and a second-stage compressor 13 that are connected in sequence. The first-stage compressor 11 has an exhaust end and an air intake end, and the air intake end is also an air intake end. The first-stage compressor 11 has a first cavity, and the first cavity is connected to the exhaust end and the air intake end, respectively, to ensure smoothness of the air flow. Among them, the air intake end of the first-stage compressor 11 is connected to the motor 14, and the exhaust end of the first-stage compressor 11 is connected to the intermediate-stage compressor 12.

[0047] The second-stage compressor 13 also has an air inlet end and an air outlet end, and the second-stage compressor 13 has a second cavity, which is respectively connected to the air inlet end and the air outlet end to ensure smooth air flow. Among them, the intermediate-stage compressor 12 is connected to the air inlet end of the second-stage compressor 13, and the intermediate-stage compressor 12 has a third cavity for air flow. The motor 14 drives the air inlet end of the first-stage compressor 11 to inhale gas. After the first-stage compression, the gas enters the intermediate-stage compressor 12, and finally enters the second-stage compressor 13 for final compression and discharge.

[0048] The intermediate-stage compression section 12 is, for example, an intermediate-stage economizer, which can perform air replenishment circulation on the compressor, improve the efficiency of the compressor refrigeration cycle, increase the cooling capacity, and reduce the exhaust temperature of the compressor. When the intermediate-stage economizer replenishes air, the user changes parameters such as the replenishment pressure and temperature according to the capacity requirements, resulting in various changes in the intermediate-stage pressure. In actual application, the suction pressure P0 of the first-stage compression section 11 is less than the pressure P1 of the intermediate-stage compression section 12 and the exhaust pressure P2 of the second-stage compression section 13. The refrigerant state of the intermediate-stage compression section 12 varies greatly. Under partial load, the exhaust pressure of the first-stage compression section 11 is lower than that of the full load, and there is an under-compression phenomenon, resulting in airflow noise, especially the airflow pulsation and noise increase caused by the air replenishment cycle of the intermediate-stage compression section 12. The intermediate-stage compression section 12 of this embodiment can be provided with a silencer assembly 2 to eliminate the noise problem caused by the exhaust of the first-stage compression section 11.

[0049] In this embodiment, if Figure 1 , Figure 2 As shown, the muffler assembly 2 includes a detection element 21, a receiving space 22 and an adjustment plate 23, wherein the adjustment plate 23 divides the receiving space 22 into a first muffler space 221 and a second muffler space 222. The adjustment plate 23 can move in the receiving space 22 to change the volume of the first muffler space 221. The third chamber of the intermediate stage compression part 12 is connected to the first muffler space 221 of the receiving space 22, so that gas can flow in the third cavity and the receiving space 22.

[0050] The adjusting plate 23 moves in the accommodating space 22, the volume of the first silencing space 221 changes, and the amount of gas entering the first silencing space 221 also changes accordingly. When the volume of gas entering the first silencing space 221 is consistent with the natural frequency of the gas in the first silencing space 221, a resonance effect is achieved, and after consuming the sound energy to the maximum extent, the gas is discharged from the first silencing space 221 and enters the second-stage compression part 13.

[0051] It is understandable that, since the accommodating space 22 has a fixed volume, when the volume of the first silencing space 221 is adjusted, the second silencing space 222 will also change accordingly, and the natural frequency of the gas in the second silencing space 222 will also change at any time.

[0052] The detection element 21 is configured to detect the pressure information of the accommodating space 22. The detection element 2 is, for example, a pressure sensor, so as to collect the pressure information in the accommodating space 22, and determine the pressure difference between the first silencing space 221 and the second silencing space 222 based on the pressure information. When the pressure difference change is detected, the control system (not shown in the figure) drives the adjustment plate 23 according to the preset algorithm, thereby dynamically adjusting the volume of the first silencing space 221 and the volume of the second silencing space 222. This adjustment is intended to match the gas entering the first silencing space 221 with its natural frequency, achieve the effect of resonant silencing, and reduce noise output.

[0053] Among them, the detection element 21 can be one, which is arranged in the first silencing space 221, so as to collect and monitor the pressure value in the first silencing space 221, and the first silencing space 221 is connected to the exhaust end of the first-stage compression part 11, aiming to adjust the vibration noise of the exhaust end of the first-stage compression part 11. Alternatively, the adjustment strategy of the silencing component 2 is further optimized. In order to improve the accuracy of pressure information collection, the detection element 21 is set to two, respectively located in the first silencing space 221 and the second silencing space 222, to independently collect the pressure information of each space. In this way, not only can the pressure state of the two spaces be reflected more accurately, but also the error that may be caused by a single sensor can be avoided.

[0054] In addition, the control system dynamically adjusts the movement speed and position of the regulating plate 23 according to the working state of the compressor (such as load changes, exhaust temperature, etc.) and the supply air pressure and temperature parameters of the intermediate stage compression part 12, so as to more finely control the volume changes of the first silencer space 221 and the second silencer space 222, thereby maintaining a good silencer effect under different working conditions.

[0055] By introducing the silencer component 2, especially its internal dynamic adjustment mechanism, the airflow noise generated by the compressor during operation can be effectively reduced, especially the airflow pulsation noise caused by the air supply cycle of the intermediate stage compression part 12, thereby improving the overall performance of the compressor and user experience.

[0056] The intermediate-stage compression section 12, namely the intermediate-stage economizer, can perform its air supply cycle more stably after optimization, reducing energy loss caused by air flow pulsation, thereby improving the refrigeration efficiency and refrigeration capacity of the compressor, while reducing the exhaust temperature and extending the service life of the compressor.

[0057] The regulating plate 23 in the silencer assembly 2 can be dynamically adjusted according to the working state and air supply parameters of the compressor, so that the compressor can maintain good silencer effect and operating efficiency under different working conditions, thereby enhancing the adaptability and flexibility of the system.

[0058] Furthermore, by introducing the detection element 21 and the control system, real-time monitoring and intelligent adjustment of the compressor operating status are achieved, the automation and intelligence level of the equipment is improved, and convenience is provided for subsequent maintenance and management.

[0059] In this embodiment, if Figure 1 , Figure 2 As shown, the muffler assembly 2 includes a muffler body 24, the interior of the muffler body 24 is a hollow structure, and the hollow structure is configured to contain a space 21 to accommodate the adjustment plate 23. The adjustment plate 23 and the muffler body 24 are connected by sliding to achieve flexible adjustment of their positions. The muffler body 24 can be cast together with the intermediate stage compression part 12 to simplify the process flow, or it can be assembled in the intermediate stage compression part 12 in the form of a single module assembly to facilitate disassembly and assembly.

[0060] Exemplarily, a slide rail (not shown in the figure) is provided on the inner wall side of the accommodating space 22, and the slide rail provides a stable and precise moving path for the adjustment plate 23. The adjustment plate 23 can be directly mounted on the slide rail, or further, the adjustment plate 23 can also be equipped with a slider (not shown in the figure), and the slider is closely matched with the slide rail to ensure the stability and accuracy of the adjustment plate 23 during movement. In the above manner, the adjustment plate 23 can slide smoothly on the slide rail, thereby changing its position in the accommodating space 21, and then adjusting the volume of the first silencing space 221 and the second silencing space 222. According to actual needs, the volume of the first silencing space 221 and the second silencing space 222 can be flexibly adjusted by sliding the adjustment plate 23, thereby achieving fine control of the silencing performance.

[0061] The silencing assembly 2 in this embodiment realizes flexible adjustment of the volume of the first silencing space 221 and the second silencing space 222 through the slidingly connected adjustment plate 23. This design allows the user to accurately adjust the working state of the silencing assembly 2 according to different noise environments and silencing requirements, thereby achieving the best silencing effect.

[0062] By adjusting the volumes of the two silencing spaces, the silencing capability of the silencing assembly 2 for noises of different frequencies can be optimized. For example, in some cases, increasing the volume of a certain silencing space may help to better absorb noises of a specific frequency, thereby improving the overall silencing efficiency.

[0063] The design of the slide rail and the slider not only provides a stable moving path for the adjustment plate 23, but also prevents the adjustment plate 23 from deviating from the preset track during movement. This design ensures the stability and reliability of the muffler assembly 2 during long-term use.

[0064] The design of the sliding connection of the adjustment plate 23 can also ensure that the adjustment plate 23 can be accurately installed, avoid deviation, and improve the accuracy during installation. It not only simplifies the maintenance work, but also improves the convenience and efficiency of adjustment.

[0065] The silencer assembly 2 in this embodiment provides the user with a more flexible, efficient and stable silencer solution through a sliding connection design and an adjustable silencer space.

[0066] In this embodiment, if Figure 1 , Figure 2 As shown, the muffler 24 is provided with a plurality of vents 241, which are communicated with the third cavity of the intermediate compression section 12. The vents 241 are communicated with the first muffler space 221, and the vents 241 include, for example, an air inlet and an air outlet, which can be separately and independently provided to meet specific airflow control requirements, or can share an opening to simplify the structure and reduce costs.

[0067] In this embodiment, the air inlet is responsible for guiding the high-pressure gas discharged from the exhaust end of the first-stage compression section 11 into the first silencer space 221 of the silencer body 24, while the air outlet is responsible for discharging the silenced gas to the intermediate-stage compression section 12, and then flowing to the air inlet end of the second-stage compression section 13.

[0068] The entire gas flow path is designed to be both efficient and compact. The high-pressure gas discharged from the first-stage compressor 11 first enters the third cavity of the intermediate-stage compressor 12 through the pipeline, and then smoothly enters the first silencing space 221 through the air inlet of the vent 241. In the first silencing space 221, the gas is damped and reflected by the silencing assembly 2, which effectively reduces the noise level. Subsequently, the silencing gas is discharged through the outlet of the vent 241 and continues its flow in the multi-stage compressor system.

[0069] By providing a plurality of vents 241 and connecting them to the first silencing space 221, the silencing assembly 2 in this embodiment can significantly reduce the noise generated by the intermediate stage compression section 12 in the multi-stage compressor system, which helps to improve the working environment and protect the hearing health of the operator. The vents 241 ensure the smooth flow of gas during the silencing process. Both the air inlet and the air outlet can be carefully calculated and optimized to minimize air flow resistance and energy loss. The vents 241 can be independently provided or can share an opening. This design enables the silencing assembly 2 to flexibly adapt to different compressor systems and silencing requirements. Users can choose the most suitable vent 241 configuration according to actual conditions to achieve the best silencing effect.

[0070] The muffler assembly 2 in this embodiment provides a multi-stage compressor system with good muffler performance and efficient gas flow capacity through its vent 241 design and muffler space configuration. When the adjustment plate 23 moves, the volume of the muffler space changes accordingly, and the natural frequency of the muffler space also changes accordingly. The amount of gas entering the muffler space from the air inlet also changes relatively. When the volume of gas entering the muffler space is consistent with the natural frequency of the muffler space, the intermediate exhaust gas entering the muffler space consumes the sound energy to the maximum extent through resonance and then discharges from the muffler space, and then enters the second-stage compression part 13.

[0071] In this embodiment, if Figure 1 , Figure 2 As shown, the silencer 24 is provided with a liquid inlet end 242 and a liquid outlet end 243 , the liquid inlet end 242 is connected to the second silencer space 222 and the exhaust end of the second stage compressor 13 , and the liquid outlet end 243 is connected to the second silencer space 222 and the air inlet end of the first stage compressor 11 .

[0072] In this embodiment, the volume of the silencing space is adjusted by injecting or discharging the oil-gas mixture. For example, when the volume of the first silencing space 221 needs to be reduced, the oil-gas mixture can be injected into the second silencing space 222 through the liquid inlet end 242 by utilizing a certain exhaust pressure generated by the exhaust end of the second-stage compression unit 13. As the oil-gas mixture is continuously injected, the pressure in the second silencing space 222 gradually increases, pushing the adjustment plate 23 to move, thereby reducing the effective volume of the first silencing space 221 (or affecting its distribution).

[0073] It can be understood that although the first silencer space 221 is mentioned in the description, according to the context, what is actually adjusted is the volume change of the second silencer space 222 directly connected to the liquid inlet end 242 and the liquid outlet end 243, thereby affecting adjacent or related spaces, such as the volume distribution or pressure balance of the first silencer space 221.

[0074] On the contrary, when it is necessary to increase the volume of the first silencing space 221, the injection of the oil-gas mixture into the liquid inlet 242 can be stopped, and the oil-gas mixture in the second silencing space 222 can be discharged through the liquid outlet 243. As the oil-gas mixture is discharged, the pressure in the second silencing space 222 gradually decreases, so that the air pressure on one side of the first silencing space 221 can push the regulating plate 23 to move in the opposite direction, thereby increasing the effective volume of the first silencing space 221 (or improving its distribution). And the oil-gas mixture is recycled to the first-stage compression part 11, realizing the recycling of resources and reducing energy consumption.

[0075] By injecting or discharging the oil-gas mixture, the silencer assembly in this embodiment can flexibly adjust the volume of the silencer space to adapt to different working conditions and silencer requirements. This dynamic adjustment capability helps to improve the silencer efficiency and reduce noise pollution. By precisely controlling the volume of the silencer space, the attenuation effect of the silencer assembly on noise of a specific frequency can be optimized, which helps to achieve more accurate noise control in a multi-stage compressor system. Dynamic adjustment of the volume of the silencer space helps to balance the pressure distribution within the compressor system, thereby enhancing the stability and reliability of the system, which helps to reduce mechanical failures and noise problems caused by pressure fluctuations.

[0076] The silencer assembly in this embodiment has a simple structure and is easy to operate. By controlling the injection and discharge of the oil-gas mixture, the user can easily adjust the volume of the silencer space without complicated maintenance work. By optimizing the volume and pressure distribution of the silencer space, the silencer assembly in this embodiment helps to reduce energy loss in the compressor system, thereby improving energy utilization efficiency.

[0077] The silencer assembly in this embodiment provides excellent silencer performance and high energy efficiency for the multi-stage compressor system through the design of its liquid inlet end 242 and liquid outlet end 243 and the ability to dynamically adjust the volume of the silencer space.

[0078] In this embodiment, if Figure 1 , Figure 2 As shown, the liquid inlet end 242 is provided with a first valve 2421, and the first valve 2421 is used to control the on-off of the liquid inlet end 242, that is, when it is necessary to inject an oil-gas mixture into the second silencing space 222, the first valve 2421 can be opened to allow the oil-gas mixture to pass through; and when injection is not required, the first valve 2421 is closed to prevent the unexpected flow of the oil-gas mixture.

[0079] The liquid outlet 243 is provided with a second valve 2431, which has a similar function to the first valve 2421, but in the opposite direction. The second valve 2431 is used to control the on-off of the liquid outlet 243, that is, when the oil-gas mixture in the second silencing space 222 needs to be discharged, the second valve 2431 can be opened to allow the oil-gas mixture to flow out; and when it is not necessary to discharge, the second valve 2431 is closed to maintain the sealing of the second silencing space 222.

[0080] Through the precise control of the first valve 2421 and the second valve 2431, the flow of the oil-gas mixture in the silencer assembly 2 can be more precisely controlled, thereby more accurately adjusting the volume and pressure of the silencer space to achieve the desired silencer effect.

[0081] The setting of the valve enables the flow of the oil-gas mixture to be effectively controlled, avoiding system pressure fluctuations caused by unexpected flow, and enhancing the stability of the entire silencer assembly 2.

[0082] In emergency situations, such as when the system is over-pressurized or the flow of the oil-gas mixture needs to be quickly cut off, this can be achieved by quickly closing the first valve 2421 and the second valve 2431, thereby improving the safety of the system.

[0083] The arrangement of the valve allows the relevant valve to be conveniently closed to disconnect the flow of the oil-gas mixture when the silencer assembly 2 needs to be maintained or cleaned, thus facilitating maintenance work. By precisely controlling the flow of the oil-gas mixture, unnecessary waste can be avoided, thereby reducing operating costs. At the same time, the durability and reliability of the valve also reduce the additional costs caused by frequent replacement or repair.

[0084] The silencer assembly 2 in this embodiment achieves precise control of the flow of the oil-gas mixture by introducing the first valve 2421 and the second valve 2431, thereby improving the silencer effect, system stability, safety and maintenance convenience, while reducing operating costs.

[0085] In this embodiment, if Figure 1 , Figure 2 As shown, a sealing design is adopted between the adjustment plate 23 and the inner side wall of the accommodating space 22. The main purpose of this sealing design is to prevent the oil-gas mixture from accidentally flowing from the second silencing space 222 into the first silencing space 221, thereby avoiding interference with the silencing effect of the first silencing space 221, and ensuring that the adjustment plate 23 can be moved and adjusted as expected. Similarly, the sealing design also effectively prevents the gas in the first silencing space 221 from entering the second silencing space 222, thereby ensuring that the adjustment plate 23 can move smoothly without being disturbed by the external gas pressure.

[0086] In order to achieve such a sealing effect, the edge of the adjustment plate 23 may be equipped with an elastic sealing strip, or other forms of sealing structures such as metal-metal sealing, O-ring sealing, etc. are used between the adjustment plate 23 and the inner wall of the accommodating space 22. These sealing measures can ensure that the oil-gas mixture or gas will not leak through the gap during the movement of the adjustment plate 23.

[0087] By ensuring the sealing between the adjustment plate 23 and the inner wall of the accommodating space 22, the oil-gas mixture or gas can be effectively prevented from flowing between different silencing spaces, thereby avoiding interference with the silencing effect and improving the overall silencing performance.

[0088] The sealing design can ensure that the adjustment plate 23 is not affected by the external gas pressure during movement, thereby improving the stability of the entire muffler assembly 2. This helps to reduce mechanical failures or noise problems caused by pressure fluctuations. The sealing design reduces the corrosion and wear of the oil-gas mixture or gas on the adjustment plate 23 and the inner wall of the accommodating space 22, thereby extending the service life of these components. Since the interference of the oil-gas mixture or gas is avoided, the adjustment plate 23 can be moved to the predetermined position more accurately, thereby achieving precise adjustment of the volume or pressure of the muffler space. The sealing design reduces the maintenance work required due to leakage, reducing maintenance costs and downtime.

[0089] The muffler assembly 2 in this embodiment improves the muffler effect, system stability, service life and adjustment accuracy by adopting a sealing design between the adjustment plate 23 and the inner wall of the accommodating space 22, while simplifying maintenance work. This design is particularly suitable for multi-stage compressor systems that require high-precision and high-stability muffler effects.

[0090] The present application also provides a compressor control method, which is applied to the compressor in the above embodiment, and achieves more efficient and stable compressor operation by accurately monitoring and adjusting the pressure in the silencing space. Figure 1 , Figure 2 As shown, the compressor includes a pump assembly 1 and a muffler assembly 2. The pump assembly 1 includes, for example, a first-stage compression part 11, an intermediate-stage compression part 12, and a second-stage compression part 13 that are connected in sequence. The muffler assembly 2 includes a detection element 21, an accommodating space 22, and an adjustment plate 23. The adjustment plate 23 divides the accommodating space 22 into a first muffler space 221 and a second muffler space 222. The adjustment plate 23 can move in the accommodating space 22 to change the volume of the first muffler space 221. The specific structure and arrangement of the pump assembly 1 and the muffler assembly 2 have been described in detail in the above embodiments, and will not be repeated here.

[0091] In some exemplary embodiments, Figure 3 As shown, the control method of the compressor in this embodiment includes:

[0092] S100: Obtain a first pressure value of a first silencing space.

[0093] In step S100 , the control system obtains pressure information of the first silencing space 221 , ie, a first pressure value, in real time through a pressure sensor installed in the first silencing space 221 . The first pressure value is, for example, a current pressure value of the first silencing space 221 .

[0094] S110, obtaining a second pressure value of the second silencing space.

[0095] In step S110, the control system also obtains the pressure information of the second silencing space 222, i.e., the second pressure value, in real time through the pressure sensor installed in the second silencing space 222. The second pressure value is, for example, the current pressure value of the second silencing space 222. The second pressure value is used to compare with the first pressure value in the first silencing space 221 to evaluate the balance state of the internal pressure of the compressor.

[0096] S120: Adjust the position of the adjustment plate in the accommodating space based on the first pressure value and the second pressure value.

[0097] In step S120, after obtaining the first pressure value of the first silencing space 221 and the second pressure value of the second silencing space 222, the control system analyzes the difference between the two pressures. If the difference exceeds a preset threshold, the control system activates the adjustment mechanism to change the volume and pressure of the first silencing space 221 and the second silencing space 222 by moving the adjustment plate 23 to restore the equilibrium state.

[0098] The position adjustment of the adjustment plate 23 can be achieved in a variety of ways, such as electric actuators, hydraulic cylinders or pneumatic cylinders, etc. These actuators will accurately move the adjustment plate 23 to a predetermined position according to the instructions issued by the control system, thereby adjusting the volume and pressure of the first silencing space 221 and the second silencing space 222.

[0099] In addition, the control system can also dynamically adjust the position of the regulating plate 23 according to the working state and operating parameters of the compressor, such as speed, load, etc., to optimize the performance and stability of the compressor.

[0100] Through the control method in this embodiment, the compressor can monitor and adjust the pressure in the silencing space in real time, effectively reduce noise and vibration, and improve the operating efficiency and stability of the compressor. At the same time, the method can also be dynamically adjusted according to the working state of the compressor, realizing precise control of the compressor performance.

[0101] It should be noted that although the present embodiment describes specific steps and components, in actual applications, appropriate adjustments and optimizations may be required according to the specific model, working environment and requirements of the compressor. In addition, the control system may also integrate other sensors and actuators to achieve more complex control and protection functions.

[0102] In some exemplary embodiments, a method for controlling a compressor is provided, which dynamically adjusts the volume of the silencing space by monitoring and analyzing the pressure value of the silencing space inside the compressor, thereby optimizing the performance and noise reduction effect of the compressor. Figure 4 As shown, the control method of the compressor in this embodiment includes:

[0103] S200: Obtain a first pressure value of a first silencing space.

[0104] S210, obtaining a second pressure value of the second silencing space.

[0105] The control method of the compressor involved in step S200 to step S210 is the same as the control method of the compressor involved in the above steps S100 to S110, and will not be repeated here.

[0106] S220: Determine pressure information according to the first pressure value and the second pressure value.

[0107] In step S220, Figure 1 , Figure 2 As shown, after obtaining the first pressure value of the first silencer space 221 and the second pressure value of the second silencer space 222, the control system will compare and analyze the first pressure value and the second pressure value to form detailed information about the pressure distribution and pressure changes inside the compressor, which will be used for subsequent volume adjustment and performance optimization decisions.

[0108] The pressure information may be, for example, a pressure difference between a first pressure value and a second pressure value, or may be a pressure ratio between the first pressure value and the second pressure value.

[0109] S230: Determine the volume of the first silencing space according to the pressure information.

[0110] In step S230, based on the pressure information obtained in step S220, the control system will calculate, through a specific algorithm or model, the volume size that the first silencing space 221 should have in order to achieve the best noise reduction effect and compressor performance.

[0111] S240: Determine the position of the adjustment plate in the accommodating space based on the volume of the first silencing space.

[0112] In step S240, if Figure 1 , Figure 2 As shown, the control system calculates the optimal position of the adjustment plate 23 in the accommodating space 22 according to the volume of the first silencing space 221 determined in step S230. Then, the adjustment plate 23 is moved to the position through a driving mechanism (such as a motor, a hydraulic cylinder, etc.), thereby realizing dynamic adjustment of the volume of the silencing space.

[0113] The compressor control method of this embodiment can monitor the pressure changes of the silencer space inside the compressor in real time, and dynamically adjust the volume of the silencer space according to these changes to achieve the best noise reduction effect and compressor performance. This method not only improves the operating efficiency of the compressor, but also significantly reduces noise pollution, providing users with a more comfortable use environment.

[0114] In some exemplary embodiments, a method for controlling a compressor is provided, which dynamically adjusts the volume of the silencing space by monitoring and analyzing the pressure value of the silencing space inside the compressor, thereby optimizing the performance and noise reduction effect of the compressor. Figure 5 As shown, the control method of the compressor in this embodiment includes:

[0115] S300: Obtain a first pressure value of a first silencing space.

[0116] S310, obtaining a second pressure value of the second silencing space.

[0117] The control method of the compressor involved in step S300 to step S310 is the same as the control method of the compressor involved in the above steps S100 to S110, and will not be repeated here.

[0118] S320: Determine pressure information according to the first pressure value and the second pressure value.

[0119] In step S320, if Figure 1 , Figure 2 As shown, after obtaining the first pressure value of the first silencing space 221 and the second pressure value of the second silencing space, the control system comprehensively analyzes these data to form pressure information about the internal pressure state of the compressor. The pressure information includes but is not limited to the pressure difference, pressure ratio, and pressure change trend, which will serve as an important basis for subsequent volume adjustment and performance optimization.

[0120] S330: Determine the volume of the second silencing space according to the pressure information.

[0121] In step S330, based on the pressure information obtained in step S320, the control system uses a specific algorithm or mathematical model to calculate the volume size that the second silencing space 222 should have in order to achieve the best noise reduction effect and compressor performance.

[0122] S340: Determine the position of the adjustment plate in the accommodating space based on the volume of the second silencing space.

[0123] In step S340, if Figure 1 , Figure 2 As shown, according to the volume of the second silencing space 222 determined in step S330, the optimal position of the adjustment plate 23 in the accommodating space 22 is calculated. In order to ensure that the adjustment plate 23 can be accurately and stably moved to the specified position, a precise driving mechanism (such as a stepper motor, a servo motor, etc.) is usually used for driving. At the same time, we can also ensure the accuracy and reliability of the entire adjustment process by monitoring the position and movement state of the adjustment plate in real time.

[0124] The compressor control method of this embodiment realizes dual optimization of compressor performance and noise reduction effect by real-time monitoring and analyzing the pressure value of the silencing space and dynamically adjusting the volume of the silencing space and the position of the adjustment plate accordingly. This method not only improves the operating efficiency and stability of the compressor, but also significantly reduces noise pollution, providing users with a quieter and more comfortable use environment.

[0125] In some exemplary embodiments, a method for controlling a compressor is provided, which monitors the pressure values ​​of the first silencing space and the second silencing space in the compressor in real time, and dynamically adjusts the volumes of the two silencing spaces and the position of the adjustment plate in the accommodating space according to these pressure values, so as to achieve the purpose of optimizing the compressor performance and noise reduction effect. Figure 6 As shown, the control method of the compressor in this embodiment includes:

[0126] S400: Obtain a first pressure value of a first silencing space.

[0127] S410: Obtain a second pressure value of the second silencing space.

[0128] The control method of the compressor involved in step S400 to step S410 is the same as the control method of the compressor involved in the above steps S100 to S110, and will not be repeated here.

[0129] S420: Determine pressure information according to the first pressure value and the second pressure value.

[0130] In step S420, if Figure 1 , Figure 2 As shown, after obtaining the first pressure value of the first silencing space 221 and the second pressure value of the second silencing space, the control system comprehensively analyzes these data to form pressure information about the internal pressure state of the compressor. The pressure information includes but is not limited to the pressure difference, pressure ratio, and pressure change trend, which will serve as an important basis for subsequent volume adjustment and performance optimization.

[0131] S430. Calculate the volumes of the first silencing space and the second silencing space according to the pressure information.

[0132] In step S430, based on the pressure information obtained in step S420, the control system uses a specific algorithm or mathematical model to calculate the volume size that the first silencing space 221 and the second silencing space 222 should have in order to achieve the best noise reduction effect and compressor performance, and can dynamically adjust the volume of the silencing space to achieve compressor performance optimization. It should be noted that the volume adjustment of the two silencing spaces may need to be considered simultaneously to ensure the overall performance balance of the compressor.

[0133] S440: Determine the position of the adjustment plate in the accommodating space based on the volumes of the first silencing space and the second silencing space.

[0134] In step S440, if Figure 1 , Figure 2 As shown, the control system calculates the optimal position of the adjustment plate 23 in the accommodating space 22 according to the volumes of the first silencing space 221 and the second silencing space 222 determined in step S430. In order to achieve this adjustment, we may need to design a set of precise adjustment mechanisms that can automatically adjust the position of the adjustment plate 23 according to the calculated volume changes. At the same time, in order to ensure the accuracy and stability of the adjustment, we also need to monitor the position and movement state of the adjustment plate 23 in real time and perform necessary feedback control.

[0135] For example, the volume of the silencing space can be adjusted by injecting an oil-gas mixture into the second silencing space 222. When the volume of the first silencing space 221 needs to be reduced, the oil-gas mixture can be injected into the second silencing space 222 through the liquid inlet end 242 using a certain exhaust pressure generated by the exhaust end of the second-stage compression unit 13. With the continuous injection of the oil-gas mixture, the pressure in the second silencing space 222 gradually increases, pushing the adjustment plate 23 to move, thereby reducing the effective volume of the first silencing space 221 (or affecting its distribution).

[0136] When it is necessary to inject an oil-gas mixture into the second silencing space 222, the first valve 2421 can be opened to connect the second silencing space 222 and the exhaust end of the second-stage compression section 13 to allow the oil-gas mixture to pass through; when injection is not required, the first valve 2421 is closed to prevent unexpected flow of the oil-gas mixture.

[0137] It is understandable that what is actually adjusted is the volume change of the second silencing space 222 directly connected to the liquid inlet end 242 and the liquid outlet end 243, thereby affecting the volume distribution or pressure balance of adjacent or associated spaces, such as the first silencing space 221.

[0138] On the contrary, when the volume of the first silencing space 221 needs to be increased, the injection of the oil-gas mixture into the liquid inlet 242 can be stopped, and the oil-gas mixture in the second silencing space 222 can be discharged through the liquid outlet 243. As the oil-gas mixture is discharged, the pressure in the second silencing space 222 gradually decreases, so that the air pressure on one side of the first silencing space 221 can push the adjustment plate 23 to move in the opposite direction, thereby increasing the effective volume of the first silencing space 221 (or improving its distribution).

[0139] When it is necessary to discharge the oil-gas mixture in the second silencing space 222, the second valve 2431 can be opened to connect the second silencing space 222 and the air inlet end of the first-stage compression part 11 to allow the oil-gas mixture to flow out; when it is not necessary to discharge, the second valve 2431 is closed to maintain the closedness of the second silencing space 222, thereby realizing automated and intelligent precise adjustment.

[0140] The compressor control method of this embodiment can monitor the pressure value of the silencer space inside the compressor in real time, and dynamically adjust the volume of the silencer space and the position of the adjustment plate according to these values, thereby optimizing the performance and noise reduction effect of the compressor.

[0141] The silencers in the related art all use a step-by-step adjustment method to change the size of the chamber. The actual use process will be affected by the oil-gas mixing ratio, which reduces the judgment of the silencer effect. In addition, the step-by-step adjustment method cannot find the best silencer effect position. The compressor provided in this application has a silencer component that adopts a stepless adjustment method. The silencer effect is corrected by the experimental data feedback method. A pressure sensor is installed on the wall of the silencer space, connected to a dedicated pressure pulsation monitoring device, and the pressure pulsation in the silencer space is monitored and fed back in real time. The amount of oil supplied to the oil cylinder is adjusted through a pressure differential switch to change the volume of the silencer space, thereby changing the inherent volume of the silencer space, achieving a one-time verification of the silencer effect of multiple frequencies. When the pressure pulsation monitoring feedback peak is the smallest, the shock absorption and noise reduction effect is the best. At the same time, the chamber volume with the best silencer effect can also be judged by directly measuring the real-time noise data of the compressor.

[0142] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0143] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0144] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A compressor, characterized in that: include: The pump body assembly comprises a first-stage compression part, an intermediate-stage compression part and a second-stage compression part which are connected in sequence, wherein the exhaust end of the first-stage compression part is connected to the intake end of the second-stage compression part through the intermediate-stage compression part; as well as A silencer assembly is arranged in the intermediate stage compression part; the silencer assembly includes a detection element, a accommodating space and an adjustment plate, the detection element is arranged to detect the pressure information of the accommodating space, and the adjustment plate divides the accommodating space into a first silencer space and a second silencer space; wherein the adjustment plate can move within the accommodating space to change the volume of the first silencer space.

2. The compressor according to claim 1, characterized in that The silencer assembly comprises a silencer body, the interior of the silencer body is a hollow structure, and the hollow structure is constructed as the accommodating space; wherein the adjustment plate is slidably connected to the silencer body.

3. The compressor according to claim 2, characterized in that The muffler is provided with a plurality of vents, and the vents are communicated with the intermediate stage compression part; Wherein, the vent is communicated with the first silencing space.

4. The compressor according to claim 2, characterized in that The muffler is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to the second muffler space and the exhaust end of the second-stage compression part, and the liquid outlet end is connected to the second muffler space and the air inlet end of the first-stage compression part.

5. The compressor according to claim 4, characterized in that The liquid inlet end is provided with a first valve, and the liquid outlet end is provided with a second valve.

6. The compressor according to claim 1, characterized in that The adjustment plate and the inner side wall of the accommodating space are sealed.

7. The compressor according to claim 1, characterized in that The detection element includes a pressure sensor.

8. A method for controlling a compressor, applied to the compressor according to any one of claims 1 to 7, characterized in that: The control method of the compressor comprises: Obtaining a first pressure value of the first silencing space; Obtaining a second pressure value of the second anechoic space; Based on the first pressure value and the second pressure value, a position of the adjustment plate in the accommodating space is determined.

9. The method for controlling a compressor according to claim 8, characterized in that: The determining the position of the adjustment plate in the accommodating space based on the first pressure value and the second pressure value includes: determining pressure information according to the first pressure value and the second pressure value; Determining the volume of the first silencing space and / or the second silencing space according to the pressure information; The position of the adjustment plate in the accommodating space is determined based on the volume of the first silencing space and / or the second silencing space.

10. The method for controlling a compressor according to claim 8, characterized in that: Determining the position of the adjustment plate in the accommodating space includes: Opening the first valve to connect the second muffler space with the exhaust end of the second-stage compression part; and / or, The second valve is opened to connect the second muffler space with the air inlet end of the first-stage compression part.

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