Air suction silencer for reducing airflow resonance

Abstract

The utility model discloses a suction muffler for reducing airflow resonance, which comprises an upper shell, a communicating vessel and a lower shell which are sequentially connected from top to bottom, a muffling cavity is formed in the middle of the upper shell and the middle of the lower shell, an air outlet pipe is arranged on the upper shell, the communicating vessel comprises a transverse partition plate, and the transverse partition plate is arranged on the lower shell. A transverse partition plate is arranged in the silencing cavity and divides the silencing cavity into an upper cavity body and a lower cavity body, a vertical partition plate is arranged at the bottom of the transverse partition plate and divides the lower cavity body into an air inlet cavity and a resonance cavity, a communicating pipe is arranged on the vertical partition plate in a penetrating mode, and vertical air holes are formed in the transverse partition plate. The vertical air hole is communicated with the air inlet cavity and the upper cavity, and the air inlet cavity is connected with an air inlet pipe; the silencer has the advantages of good silencing effect, multi-frequency noise reduction and resonance reduction.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor components, and in particular relates to an air suction muffler for reducing airflow resonance. Background Art

[0002] Existing large commercial compressors have relatively high gas dynamic noise, which is caused by the vibration of gas due to the flow of gas or the movement of objects in the gas. In refrigerator compressors, the intermittent intake and exhaust generate pressure fluctuations, which excite the vibration of the valve plate and pipeline, thereby generating noise. In addition, the vibration of the compressor excites the refrigerant gas in the shell to resonate, which also generates noise. If the intake and exhaust frequencies and their harmonics coincide with a certain order of natural frequency in the cavity, gas resonance is likely to occur. Commercial compressors have large pressure and pulsation, which are more prone to resonance. The existing silencer pipelines are relatively simple and can only reduce the amount of muffling at a certain frequency. A compressor is often matched with a variety of different refrigerators, which will generate gas resonance in some refrigerators, resulting in a loud noise from the compressor.

[0003] The suction muffler is a component in the compressor used to reduce the noise at the suction end. It is usually composed of an upper suction muffler shell, a lower suction muffler shell and a connecting partition structure in the middle.

[0004] The problem with the existing technology is that the existing suction silencer has a simple structure, usually only including two upper and lower silencer cavities, which have a noise reduction effect on individual frequency bands, cannot effectively reduce the amount of silence at multiple frequencies, and the silencer band is narrow; when the system pressure is high, resonance is easy to occur. Summary of the Invention

[0005] The purpose of the utility model is to provide an air intake silencer for reducing airflow resonance in order to solve the problems existing in the prior art, which has the advantages of good silencing effect, multi-frequency noise reduction and reduced resonance.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an intake silencer for reducing airflow resonance, comprising an upper shell, a communicating vessel and a lower shell connected in sequence from top to bottom, a silencer cavity is formed in the middle of the upper shell and the lower shell, an air outlet pipe is provided on the upper shell, the communicating vessel comprises a transverse partition, the transverse partition divides the silencer cavity into an upper cavity and a lower cavity, a vertical partition is provided at the bottom of the transverse partition, the vertical partition divides the lower cavity into an air intake cavity and a resonance cavity, a communicating pipe is provided through the vertical partition, a vertical air hole is opened on the transverse partition, the vertical air hole connects the air intake cavity and the upper cavity, and the air intake cavity is connected to the air intake pipe.

[0007] In the above scheme, a silencer cavity structure is formed by connecting the upper shell and the lower shell to perform fluid silencer. The horizontal partition of the communicating vessel divides the silencer cavity into an upper cavity and a lower cavity, and the lower cavity is divided into an air intake cavity and a resonance cavity by a vertical partition. After the gas medium enters the air intake cavity from the air intake pipe, part of the gas flows into the resonance cavity through the communicating pipe. The connecting pipe and the resonance cavity enhance the friction between the air flow and the structural wall during movement, enhance the sound resistance, avoid air flow resonance, and achieve the purpose of reducing noise. The air in the air intake cavity enters the upper cavity through the vertical air hole, and then is discharged from the silencer from the air outlet pipe.

[0008] Furthermore, a connecting portion is provided on the transverse partition, and the vertical air hole is opened through the middle of the connecting portion, and the length of the vertical air hole includes at least two types.

[0009] By setting a connecting part and opening a vertical air hole in the middle of the connecting part, the friction between the structural wall and the gas is strengthened and the noise is reduced. The lengths of the vertical air holes can be set in various ways to reduce noise in multiple frequency bands.

[0010] Furthermore, the connecting portion includes a short block and a long block, and the short block and the long block are respectively provided with vertical air holes.

[0011] By opening vertical air holes on the short blocks and the long blocks, vertical air holes of various lengths are formed. When air flows through the vertical air holes of different lengths, the sound attenuation in a specific frequency band can be correspondingly improved.

[0012] Furthermore, the air intake pipe is provided with a plurality of through holes in the pipe wall, and the outer ring of the air intake pipe is coated with a sound absorbing material, and the sound absorbing material covers the area of ​​the through holes in the pipe wall.

[0013] By opening a through hole in the pipe wall of the intake pipe and setting sound-absorbing material on the outer circle of the intake pipe, the noise reduction effect at the intake pipe is improved. The friction resistance encountered by the gas when passing through the intake pipe is enhanced, achieving the purpose of noise reduction and improving the noise reduction performance at the intake pipe.

[0014] Furthermore, a sunken table is provided on the top of the lower shell, and the outer edge of the transverse partition is connected to the sunken table.

[0015] The sunken table is provided to coordinate with the transverse partition for positioning, and the top of the transverse partition is fitted with the top surface of the upper shell to ensure structural stability.

[0016] Furthermore, a slot is provided in the lower shell, and the vertical partition is snap-connected in the slot.

[0017] Two card slots are provided to engage with the two sides of the vertical partition in a corresponding manner, which makes installation easy and enables the vertical partition to separate the lower cavity.

[0018] Furthermore, a vertical guide plate is provided in the resonance chamber, and a flow channel is provided between the top of the vertical guide plate and the horizontal partition plate. The vertical guide plate is provided to further separate the resonance chamber, increase the contact between the gas and the wall, and improve the noise reduction performance.

[0019] Furthermore, an oil leakage hole is provided at the bottom of the lower shell. The oil entering the suction muffler flows back to the interior of the compressor shell through the oil leakage hole at the bottom of the lower shell.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. A separate resonance chamber is formed by setting a vertical partition in the lower cavity, and a connecting pipe is set on the vertical partition to improve the sound absorption and reduce airflow resonance;

[0022] 2. The noise reduction effect of the intake pipe is enhanced by placing sound-absorbing materials on the outside of the intake pipe; in combination with opening through holes in the pipe wall, the friction resistance of the gas passing through the intake pipe is increased, thereby enhancing the noise reduction effect;

[0023] 3. By setting up the connection structure, vertical air holes of various lengths are formed to improve the sound insulation effect of multiple frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure explosion of an air intake silencer for reducing airflow resonance in an embodiment of the utility model Figure 1 ;

[0025] Figure 2 This is a structural perspective diagram of an air intake muffler for reducing airflow resonance according to an embodiment of the present utility model;

[0026] Figure 3 The structure explosion of an air intake silencer for reducing airflow resonance in an embodiment of the utility model Figure 2 ;

[0027] Figure 4 This is a cross-sectional view of the structure of an air intake muffler for reducing airflow resonance according to an embodiment of the present utility model;

[0028] In the figure: 1. Upper shell; 2. Air outlet pipe; 3. Lower shell; 4. Upper cavity; 5. Air inlet cavity; 6. Resonance cavity; 7. Horizontal partition; 8. Vertical partition; 9. Connecting pipe; 10. Vertical air hole; 11. Air inlet pipe; 12. Sound-absorbing material; 13. Short block; 14. Long block; 15. Through hole in pipe wall; 16. Oil leakage hole; 17. Sinking table; 18. Slot; 19. Vertical guide plate; 20. Flow channel outlet. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solution of the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Example

[0030] like Figure 1-4 As shown, an intake silencer for reducing airflow resonance includes an upper shell 1, a communicating vessel and a lower shell 3 connected in sequence from top to bottom, a silencer cavity is formed in the middle of the upper shell 1 and the lower shell 3, an air outlet pipe 2 is provided on the upper shell 1, the communicating vessel includes a transverse partition 7, the transverse partition 7 divides the silencer cavity into an upper cavity 4 and a lower cavity, a vertical partition 8 is provided at the bottom of the transverse partition 7, the vertical partition 8 divides the lower cavity into an air intake cavity 5 and a resonance cavity 6, a communicating pipe 9 is provided through the vertical partition 8, a vertical air hole 10 is opened on the transverse partition 7, the vertical air hole 10 connects the air intake cavity 5 and the upper cavity 4, and the air intake cavity 5 is connected to an air intake pipe 11.

[0031] In the above scheme, a silencer cavity structure is formed by connecting the upper shell 1 and the lower shell 3 to perform fluid silencer. The transverse partition 7 of the communicating vessel divides the silencer cavity into an upper cavity 4 and a lower cavity, and then the lower cavity is divided into an air intake cavity 5 and a resonance cavity 6 through a vertical partition 8. After the gas medium enters the air intake cavity 5 from the air intake pipe 11, part of the gas flows into the resonance cavity 6 through the communicating pipe 9. The communicating pipe 9 and the resonance cavity 6 enhance the friction between the air flow and the structural wall during movement, enhance the sound resistance, avoid air flow resonance, and achieve the purpose of reducing noise. The air in the air intake cavity 5 enters the upper cavity 4 through the vertical air hole 10, and then is discharged from the silencer from the air outlet pipe 2.

[0032] A separate resonance chamber 6 is set in the lower cavity of the muffler, which is connected to the resonance chamber 6 by the inner hole of the connecting pipe 9 of the vertical partition 8. The air column in the connecting pipe 9 is similar to a piston and has a certain sound quality. The resonance chamber 6 is similar to a gas spring. When the gas vibrates in the inner hole of the connecting pipe 9, there is friction and damping on the aperture wall, which has a certain sound resistance, thereby achieving the purpose of noise reduction.

[0033] Furthermore, a connecting portion is provided on the transverse partition 7 , and the vertical air hole 10 is provided through the middle of the connecting portion. The lengths of the vertical air hole 10 include at least two types.

[0034] By setting a connecting part and opening a vertical air hole 10 in the middle of the connecting part, the friction between the structural wall and the gas is enhanced to reduce noise. The lengths of the vertical air holes 10 are set in various ways to reduce noise in multiple frequency bands.

[0035] The pressure of commercial compressors is relatively high, and the sound pressure values ​​in various frequency bands are relatively high. In order to improve the muffler volume in multiple frequency bands, a plurality of vertical air holes 10 of different lengths are arranged on the muffler connecting pipe 9. In the embodiment, the lengths of the vertical air holes 10 are 12 mm and 20 mm respectively.

[0036] Furthermore, the connecting portion includes a short block 13 and a long block 14 , and vertical air holes 10 are respectively formed on the short block 13 and the long block 14 .

[0037] By opening vertical air holes 10 on the short block 13 and the long block 14 , vertical air holes 10 of various lengths are formed. When air flows through the vertical air holes 10 of different lengths, the sound attenuation in a specific frequency band can be correspondingly improved.

[0038] In this embodiment, the short blocks 13 and long blocks 14 are integrally formed with the transverse partition 7 in a stepped structure, but can also be separated as needed. The connecting portion can comprise a cylindrical or square column. Multiple vertical air holes 10 are defined in each of the short blocks 13 and long blocks 14, each with a diameter of 2 mm to 5 mm.

[0039] Furthermore, the air intake pipe 11 is provided with a plurality of through holes 15 in the pipe wall. The outer ring of the air intake pipe 11 is coated with a sound absorbing material 12 , and the sound absorbing material 12 covers the area of ​​the through holes 15 in the pipe wall.

[0040] By opening a through hole 15 in the pipe wall of the intake pipe 11 and arranging a sound-absorbing material 12 on the outer circle of the intake pipe 11, the noise reduction effect at the intake pipe 11 is improved. The friction resistance encountered by the gas when passing through the intake pipe 11 is enhanced, thereby achieving the purpose of noise reduction and improving the noise reduction performance at the intake pipe 11.

[0041] The sound absorbing material 12 is preferably glass wool or rock wool, and the sound absorbing material 12 and the air intake pipe 11 can be bonded using AB glue.

[0042] A circle of sound-absorbing material 12 is set on the outer ring of the muffler intake pipe 11. When sound waves enter the intake pipe 11, they cause the gas and fibers at the sound-absorbing material 12 in the muffler to vibrate. Due to friction resistance and viscous resistance, part of the sound energy is converted into heat energy and dissipated, thereby achieving the purpose of noise reduction.

[0043] Furthermore, a sunken table 17 is provided on the top of the lower shell 3 , and the outer edge of the transverse partition 7 is connected to the sunken table 17 .

[0044] The sunken table 17 is provided to cooperate with the transverse partition 7 for positioning, and the top of the transverse partition 7 is fitted with the top surface of the upper shell 1 to ensure structural stability.

[0045] The upper shell 1 and the lower shell 3 are fixed by welding.

[0046] Furthermore, a slot 18 is provided in the lower shell 3 , and the vertical partition 8 is snap-connected in the slot 18 .

[0047] By providing two card slots 18 to engage with the two sides of the vertical partition 8 correspondingly, the installation is convenient, so that the vertical partition 8 can separate the lower cavity.

[0048] Furthermore, a vertical guide plate 19 is provided in the resonance chamber 6, and a flow channel opening 20 is provided between the top of the vertical guide plate 19 and the transverse partition 7. The vertical guide plate 19 is provided to further separate the resonance chamber 6, increase the contact between the gas and the wall, and improve the noise reduction performance.

[0049] Furthermore, an oil leakage hole 16 is provided at the bottom of the lower shell 3. The oil entering the suction muffler flows back to the interior of the compressor shell through the oil leakage hole 16 at the bottom of the lower shell 3.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air intake muffler for reducing airflow resonance, comprising an upper shell, a communicating vessel, and a lower shell connected in sequence from top to bottom, wherein a muffler cavity is formed in the middle of the upper shell and the lower shell, and an air outlet pipe is provided on the upper shell, characterized in that: The communicating vessel includes a transverse partition, which divides the silencer cavity into an upper cavity and a lower cavity. A vertical partition is provided at the bottom of the transverse partition, which divides the lower cavity into an air intake cavity and a resonance cavity. A connecting pipe is provided through the vertical partition, and vertical air holes are provided on the transverse partition, which connect the air intake cavity and the upper cavity, and the air intake cavity is connected to the air intake pipe.

2. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: The transverse partition is provided with a connecting portion, and the middle of the connecting portion is penetrated by the vertical air hole, and the length of the vertical air hole includes at least two types.

3. The air intake silencer for reducing airflow resonance according to claim 2, characterized in that: The connecting portion comprises a short block and a long block, and vertical air holes are respectively opened on the short block and the long block.

4. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: The air intake pipe is provided with a plurality of through-holes in the pipe wall. The outer ring of the air intake pipe is coated with a sound-absorbing material, and the sound-absorbing material covers the through-hole area in the pipe wall.

5. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: A sunken table is provided on the top of the lower shell, and the outer edge of the transverse partition is connected to the sunken table.

6. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: A slot is provided in the lower shell, and the vertical partition is snap-connected in the slot.

7. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: A vertical guide plate is provided in the resonance cavity, and a flow channel opening is provided between the top of the vertical guide plate and the horizontal partition plate.

8. The air intake muffler for reducing airflow resonance according to claim 1, characterized in that: An oil leakage hole is provided at the bottom of the lower shell.

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