CN-122014624-A - Silencing unit, silencing module, silencer, compressor and silencing control method

Abstract

The application relates to the technical field of noise reduction, in particular to a silencing unit, a silencing module, a silencer, a compressor and a silencing control method. The silencing unit comprises a first prism body, a second prism body, a first sealing plate, a second sealing plate, a first sealing film, a second sealing film and an electromagnetic driving assembly, wherein the first sealing film is attached to the inner surface of the first prism body, the second sealing film is attached to the outer surface of the second prism body, a first sealing cavity is formed by encircling the first sealing film, the second sealing film, the first sealing plate and the second sealing plate, and the first sealing cavity is configured to be filled with magnetorheological medium. The rheological state of the magnetorheological medium is controlled through the magnetic field, so that the quick switching of the silencing unit between different acoustic working modes is realized, the dynamic adaptation can be carried out on different frequency band noises generated by the compressor under different load working conditions, and the problems of fixed silencing frequency band and poor working condition adaptability of the traditional silencer are solved.

Inventors

• LUO CHILIANG
• LI YING
• CHEN PING
• YANG YOUZHAO
• GENG YAN
• HE JIAXI
• DING JIAYUN

Assignees

• 珠海格力电器股份有限公司
• 国网江苏省电力有限公司常州供电分公司

Dates

Publication Date

20260512

Application Date

20251230

Claims (15)

1. 1. A sound attenuating unit, comprising: The first prism and the second prism are in a prismatic shape formed by bending a perforated plate and provided with openings at two ends, the second prism is sleeved in the first prism, and the first prism is opposite to the side face of the second prism one by one; the first sealing plate and the second sealing plate are respectively arranged at two ends of the first prism body and close openings at two ends of the first prism body and the second prism body; The first sealing film is attached to the inner surface of the first prism, the second sealing film is attached to the outer surface of the second prism, and a first sealing cavity is formed by surrounding the first sealing film, the second sealing film, the first sealing plate and the second sealing plate, and is configured to be filled with magnetorheological medium; And the electromagnetic driving assembly is configured to control the flow state of the magnetorheological medium so as to switch the working mode of the silencing unit between a sound absorption mode and a reflection mode.
2. 2. The sound attenuating unit of claim 1, wherein the first prism and the second prism are each a regular prism in shape.
3. 3. The sound attenuating unit of claim 2, wherein the first prism and the second prism are each in the shape of a regular hexagonal prism.
4. 4. The sound attenuating unit of claim 1, wherein an electromagnetic drive assembly is disposed within the second prism, the electromagnetic drive assembly including a magnetic core and a coil wound around the magnetic core.
5. 5. The silencer unit according to any one of claims 1 to 4, further comprising a reinforcing member including a center rod, first and second fixing members, both ends of the center rod being fixed to the first and second sealing plates, respectively, both ends of the first fixing member being connected to a peripheral surface of the center rod and the second prism, respectively, and the electromagnetic driving member being connected to the center rod through the second fixing member.
6. 6. A sound attenuation module comprising a support frame and a plurality of sound attenuation units according to any one of claims 1-5 fixed to the support frame, wherein the sound attenuation units have axes that are parallel and arranged in a honeycomb array.
7. 7. The silencer module of claim 6, wherein the support frame includes a plurality of support rings and connecting rods arranged in an array, adjacent support rings are connected by the connecting rods, the cross-sectional shape of the annular surface in the support ring is a polygon matched with the outer surface of the first prism, and a plurality of air passing holes are formed around the support ring and the connecting rods.
8. 8. The muffler module of claim 7, wherein the support frame further comprises an outer frame, the support rings are all positioned in the outer frame and are fixed with the outer frame through connecting rods, and a plurality of air passing holes are formed between the outer frame, the support rings and the connecting rods in a surrounding manner.
9. 9. A muffler comprising a housing and at least one muffler module as claimed in any one of claims 6 to 8, wherein the housing is provided with an air inlet and an air outlet at opposite ends in a first direction, respectively, and the muffler module is disposed in the housing with an axial direction of the muffler unit in the first direction.
10. 10. The muffler of claim 9 wherein three of the muffler modules are provided and are arranged in sequence along the first direction.
11. 11. The muffler of claim 10 further comprising a control unit and noise monitoring sensors for detecting noise parameters at different locations of the muffler, the control unit being communicatively coupled to the noise monitoring sensors and the electromagnetic drive assembly of each of the muffler units, respectively.
12. 12. A compressor comprising a muffler as claimed in any one of claims 9 to 11.
13. 13. A sound deadening control method applied to the muffler according to any one of claims 9 to 11, comprising: Acquiring a noise frequency F corresponding to the air inlet side of each silencing module in the shell, and setting a first preset frequency F1 and a second preset frequency F2, wherein F1 is smaller than F2; Based on the correlation between F and F1, F2, the number of sound-deadening units in sound-absorbing mode and the number of sound-deadening units in reflection mode in the corresponding sound-deadening modules are controlled to be X and x+y=100%.
14. 14. The sound deadening control method according to claim 13, wherein the step of controlling X and Y in the corresponding module based on the correlation of F and F1, F2 includes: if F is less than or equal to F1, controlling X in the corresponding silencing module to be less than or equal to a; if F is more than or equal to F2, controlling X in the corresponding silencing module to be more than or equal to b, and a is less than b; if F1< F < F2, a < X < b in the corresponding silencing module is controlled.
15. 15. A sound deadening control method applied to the muffler according to claim 10 or 11, characterized by comprising: Acquiring the noise frequency F of the air flow entering the silencer, and setting a third preset frequency F3 and a fourth preset frequency F4, wherein F3 is smaller than F4; If F is less than or equal to F3, controlling the silencing units in all the silencing modules to be in a reflecting mode; if F is more than or equal to F4, controlling the silencing units in all the silencing modules to be in a sound absorption mode; if F3 is less than F4, the silencing units in the silencing modules close to the air inlet are controlled to be in a reflection mode, the silencing units in the silencing modules close to the air outlet are controlled to be in a sound absorption mode, and the silencing units in the silencing modules in the middle are controlled to have working states of the sound absorption mode and the reflection mode.

Description

Silencing unit, silencing module, silencer, compressor and silencing control method Technical Field The application relates to the technical field of noise reduction, in particular to a silencing unit, a silencing module, a silencer, a compressor and a silencing control method. Background The screw compressor, the core component of a commercial water-cooled screw machine set, is a main broadband noise source when the commercial water-cooled screw machine set is in operation. The frequency and intensity of the noise generated by the compressor can be dynamically changed along with the change of the load (such as start-stop, loading and unloading). Currently, most conventional silencers widely used in compressors are expansion chambers or variants thereof, the silencing performance of which depends on the structural parameters of the geometry (e.g. chamber length, partition spacing) in a fixed form. The silencer with the fixed structure can only efficiently eliminate the noise of a certain specific frequency band, when the compressor operates under different loads, the main frequency of the noise can deviate, so that the effect of the traditional silencer is obviously reduced, even resonance is generated under a certain working condition, the noise is amplified, and the contradiction between fixed silencing frequency and variable noise frequency exists. Disclosure of Invention In order to solve the technical problems, the application provides a silencing unit, a silencing module, a silencer, a compressor and a silencing control method. In a first aspect, an embodiment of the present application provides a muffler unit including: The first prism and the second prism are in a prismatic shape formed by bending a perforated plate and provided with openings at two ends, the second prism is sleeved in the first prism, and the first prism is opposite to the side face of the second prism one by one; the first sealing plate and the second sealing plate are respectively arranged at two ends of the first prism body and close openings at two ends of the first prism body and the second prism body; The first sealing film is attached to the inner surface of the first prism, the second sealing film is attached to the outer surface of the second prism, and a first sealing cavity is formed by surrounding the first sealing film, the second sealing film, the first sealing plate and the second sealing plate, and is configured to be filled with magnetorheological medium; And the electromagnetic driving assembly is configured to control the flow state of the magnetorheological medium so as to switch the working mode of the silencing unit between a sound absorption mode and a reflection mode. Further, the shapes of the first prism body and the second prism body are regular prisms. Further, the shapes of the first prism body and the second prism body are regular hexagonal prisms. Further, the electromagnetic driving assembly is arranged inside the second prism body, and the electromagnetic driving assembly comprises a magnetic core and a coil wound around the magnetic core. Further, the silencing unit further comprises a reinforcing component, the reinforcing component comprises a center rod, a first fixing piece and a second fixing piece, two ends of the center rod are respectively fixed with the first sealing plate and the second sealing plate, two ends of the first fixing piece are respectively connected with the peripheral surface of the center rod and the second prism, and the electromagnetic driving component is connected with the center rod through the second fixing piece. In a second aspect, an embodiment of the present application provides a sound attenuation module, which includes a support frame and a plurality of sound attenuation units provided in the first aspect of the embodiment of the present application and fixed on the support frame, where axes of the sound attenuation units are parallel and arranged in a honeycomb array. Further, the support frame comprises a plurality of support rings and connecting rods which are arranged in an array, the adjacent support rings are connected through the connecting rods, the cross section of the annular surface in the support ring is polygonal matched with the outer surface of the first prism, and a plurality of air passing holes are formed in the periphery of the support ring and the connecting rods. Further, the support frame further comprises an outer frame, the support rings are located in the outer frame and fixed with the outer frame through connecting rods, and a plurality of air passing holes are formed between the outer frame, the support rings and the connecting rods in a surrounding mode. In a third aspect, an embodiment of the present application provides a muffler, including a housing and at least one muffler module according to the second aspect of the embodiment of the present application, where two ends of the housing opposite to each other in a first direction ar