Double-layer sound-absorbing pack exhaust silencer for compressor and compressor
By using a double-layer silencing package structure and a perforated partition design, the problem of insufficient high-frequency noise reduction in existing exhaust mufflers has been solved, achieving wider-band noise reduction and reduced energy loss.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO WANBAO COMPRESSOR
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-07
AI Technical Summary
Existing exhaust mufflers are insufficient in reducing high-frequency noise, and the increased exhaust back pressure and temperature lead to greater energy loss.
It adopts a double-layer sound-absorbing structure, and enhances the sound wave reflection intensity, extends the sound wave transmission path, widens the noise reduction frequency band, and reduces the exhaust back pressure through the design of perforated partitions and diversion holes.
It effectively broadens the noise reduction frequency band, reduces exhaust temperature and energy loss, and enhances the sound wave reflection effect.
Smart Images
Figure CN224469267U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of refrigeration compressor technology, and relates to a double-layer silencer for compressor exhaust silencer and compressor. Background Technology
[0002] Reciprocating compressors generate significant airflow noise during high-speed operation. Simultaneously, the intermittent exhaust caused by piston movement leads to strong pressure pulsations, further exacerbating compressor noise. The exhaust muffler is a key component for reducing compressor exhaust noise. Connecting the muffler to the middle section of the inner exhaust pipe utilizes expansion chambers and alterations to the internal flow path to reduce noise. By interfering with the airflow behavior within the inner exhaust pipe, the sound wave transmission path is altered, reducing exhaust pressure pulsations and thus lowering compressor exhaust noise.
[0003] Because large-displacement compressors operate at high temperatures and require a clean and unobstructed working environment in the air circuit, high-porosity, low-hardness materials such as sound-absorbing cotton cannot be used for high-frequency noise reduction.
[0004] Currently, common exhaust mufflers are mainly reactive mufflers, which typically use an expansion chamber and perforated plate to change the flow channel cross-section to reduce exhaust noise. This method reflects and interferes with sound wave propagation, resulting in a narrow noise reduction band, usually only improving noise within a small frequency range, and lacking high-frequency noise reduction capability. Furthermore, this method leads to higher compressor exhaust back pressure, increased exhaust temperature, and greater energy loss.
[0005] Therefore, it is evident that the structure of existing exhaust mufflers needs further improvement. Utility Model Content
[0006] The purpose of this invention is to propose a double-layer silencer for compressor exhaust and compressor, which enhances the intensity of sound wave reflection, extends the sound wave transmission path, and broadens the noise reduction frequency band.
[0007] To achieve the above objectives, this utility model adopts the following technical solution:
[0008] A double-layer muffler for compressor exhaust, comprising:
[0009] The shell has a closed cavity inside;
[0010] The muffler is installed inside a closed cavity, and several exhaust holes that communicate with the interior of the muffler are opened at the front and rear ends.
[0011] The perforated partition separates the front and rear ends of the sound-absorbing package, and also separates the front and rear ends of the enclosed cavity;
[0012] The perforated partition is provided with a first diversion hole connecting the front and rear ends of the sound-absorbing package and a second diversion hole connecting the front and rear ends of the enclosed cavity.
[0013] The front exhaust pipe penetrates the enclosed cavity and connects to the front of the muffler.
[0014] The exhaust pipe at the end connects to the rear end of the sealed cavity.
[0015] Preferably, the muffler package includes a front muffler package and a rear muffler package, which are integrated to form the muffler package.
[0016] Preferably, the front half of the sound-absorbing packaging is fitted onto the front end face of the perforated partition, and the rear half of the sound-absorbing packaging is fitted onto the rear end face of the perforated partition.
[0017] Preferably, the front end face of the perforated partition is provided with a number of first slots along the circumferential direction, and the edge of the front half of the sound-absorbing bag is engaged with the first slots.
[0018] The rear end face of the perforated partition is provided with several second slots along the circumferential direction, and the edge of the rear half of the sound-absorbing bag is engaged with the second slots.
[0019] Preferably, the housing includes a front housing and a rear housing, which are assembled together to form the housing.
[0020] Preferably, the rear half of the housing is provided with an assembly step at its edge, and the front half of the housing is assembled onto the assembly step at its edge.
[0021] Preferably, the edge of the front half of the shell is welded to the assembly step.
[0022] Preferably, the exhaust holes are arranged in multiple rows along the circumference of the muffler, and each row of exhaust holes is arranged in multiple rows along the axial direction of the muffler.
[0023] Preferably, the first diversion hole is located in the middle of the perforated partition, and the second diversion hole is located at the edge of the perforated partition.
[0024] A compressor, wherein the compressor is provided with the above-mentioned compressor double-layer silencer exhaust silencer.
[0025] Compared with the prior art, this utility model has the following advantages:
[0026] As described above, this utility model discloses a double-layer silencer for compressor exhaust. When applied to a compressor, the exhaust airflow enters the front end of the silencer from the front exhaust pipe. A portion of the airflow enters the rear end of the silencer through a first diversion hole, then enters the rear end of the enclosed cavity through an exhaust port at the rear end of the silencer, and continues to exit from the end exhaust pipe. The other portion of the airflow is blocked and reflected by a perforated partition, entering the front end of the enclosed cavity through an exhaust port at the front end of the silencer, then entering the rear end of the enclosed cavity through a second diversion hole, and continuing to exit from the end exhaust pipe. This enhances the sound wave reflection intensity, extends the sound wave transmission path, and broadens the noise reduction frequency band. Furthermore, through the above configuration, the exhaust back pressure and exhaust temperature can be effectively reduced, thus minimizing energy loss. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0028] Figure 1 This is a three-dimensional exploded view of the double-layer silencer exhaust muffler for compressors according to an embodiment of this utility model;
[0029] Figure 2 This is a perspective view of the sound-absorbing bag and perforated partition according to an embodiment of the present utility model;
[0030] Figure 3 This is a perspective view of the front half of the sound-absorbing package in an embodiment of this utility model;
[0031] Figure 4 This is a perspective view of the rear half of the sound-absorbing package according to an embodiment of the present utility model;
[0032] Figure 5 This is a perspective view of the perforated partition in an embodiment of the present utility model. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0034] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0036] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0039] Example 1
[0040] like Figures 1 to 5 As shown, the double-layer muffler exhaust muffler for the compressor in this embodiment includes a housing (front half housing 11 and rear half housing 12), a muffler (front half muffler 21 and rear half muffler 22), a perforated partition 3, a front exhaust pipe 4 and an end exhaust pipe 5.
[0041] The interior of the shell is a closed cavity. Specifically, the shell includes a front shell 11 and a rear shell 12, which are assembled together to form the shell. The front end profile of the front shell 11 is hemispherical, and the rear end profile is a cylindrical sleeve structure; the front end profile of the rear shell 12 is a cylindrical sleeve structure, and the rear end profile is hemispherical.
[0042] The rear half-shell 12 has an assembly step 121 at its edge. The outer diameter of the front half-shell 11 is the same as the inner diameter of the assembly step 121. The edge of the front half-shell 11 fits onto the assembly step 121 and is welded to the assembly step 121. This seals the front half-shell 11 and the rear half-shell 12 together, forming a closed cavity inside the shell.
[0043] The muffler is located inside a closed cavity, and several exhaust holes 23 communicating with the interior of the muffler are opened at both the front and rear ends of the muffler. The exhaust holes 23 are arranged in multiple rows at equal intervals along the circumference of the muffler, and each row of exhaust holes 23 is arranged in multiple rows at equal intervals along the axial direction of the muffler.
[0044] The muffler includes a front muffler 21 and a rear muffler 22, which are assembled together to form the muffler. The front end of the front muffler 21 has a hemispherical shape, and the rear end has a cylindrical sleeve shape; the front end of the rear muffler 22 has a cylindrical sleeve shape, and the rear end has a hemispherical shape.
[0045] The front half of the sound-absorbing package 21 is assembled on the front end face of the perforated partition 3, and the rear half of the sound-absorbing package 22 is assembled on the rear end face of the perforated partition 3.
[0046] The front end face of the perforated partition 3 has four arc-shaped first slots 311 evenly spaced along the circumference, and the edge of the front half of the sound-absorbing bag 21 is engaged with the first slots 311. The rear end face of the perforated partition 3 has four arc-shaped second slots 312 arranged along the circumference, and the edge of the rear half of the sound-absorbing bag 22 is engaged with the second slots 312.
[0047] The perforated partition 3 is designed as a circular structure. The perforated partition 3 separates the front and rear ends of the sound-absorbing package and the front and rear ends of the enclosed cavity.
[0048] The outer diameter of the perforated partition 3 is the same as the inner diameter of the shell (rear half shell 12). The two are welded together to assemble the rear end face of the perforated partition 3 onto the assembly step 121 of the rear half shell 12.
[0049] The perforated partition 3 is provided with a first diversion hole 321, which is located in the middle of the perforated partition 3 and connects the front and rear ends of the sound-absorbing package. The perforated partition 3 is provided with six second diversion holes 322, which are located at the edge of the perforated partition 3 and are arranged at equal intervals. The second diversion holes 322 connect the front and rear ends of the enclosed cavity.
[0050] The front end of the front exhaust pipe 4 is welded with a metal connector 6, and the rear end of the front exhaust pipe 4 is inserted into the closed cavity and connected to the front end of the muffler. Specifically, the rear end of the front exhaust pipe 4 is first inserted into the front end of the front half housing 11, the outer wall of the front exhaust pipe 4 is sealed to the front end of the front half housing 11, and the rear end of the front exhaust pipe 4 is connected to the front end of the front half muffler 21.
[0051] The end exhaust pipe 5 is connected to the rear end of the closed cavity. Specifically, the outer wall of the end exhaust pipe 5 is sealed to the rear end of the rear half shell 12.
[0052] Example 2
[0053] A compressor, wherein the compressor is equipped with the double-layer silencer and exhaust silencer described in Embodiment 1.
[0054] The present embodiment has now been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the double-layer silencer for compressors and the compressor of this utility model. The double-layer silencer for compressors of this utility model, when applied to a compressor, allows exhaust airflow to enter the front end of the silencer from the front exhaust pipe 4. A portion of the airflow enters the rear end of the silencer through the first diversion hole 321, then enters the rear end of the enclosed cavity through the exhaust hole 23 at the rear end of the silencer, and continues to exit from the end exhaust pipe 5. Another portion of the airflow is blocked and reflected by the perforated partition 3, entering the front end of the enclosed cavity through the exhaust hole 23 at the front end of the silencer, then enters the rear end of the enclosed cavity through the second diversion hole 322, and continues to exit from the end exhaust pipe 5. This enhances the sound wave reflection intensity, extends the sound wave transmission path, and broadens the noise reduction frequency band. Furthermore, through the above arrangement, the exhaust back pressure and exhaust temperature can be effectively reduced, thus minimizing energy loss.
[0055] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.
Claims
1. A double-layer silencer for compressor exhaust, characterized in that, include: The shell has a closed cavity inside; The muffler is installed inside a closed cavity, and several exhaust holes that communicate with the interior of the muffler are opened at the front and rear ends. The perforated partition separates the front and rear ends of the sound-absorbing package, and also separates the front and rear ends of the enclosed cavity; The perforated partition is provided with a first diversion hole connecting the front and rear ends of the sound-absorbing package and a second diversion hole connecting the front and rear ends of the enclosed cavity. The front exhaust pipe penetrates the enclosed cavity and connects to the front of the muffler. The exhaust pipe at the end connects to the rear end of the sealed cavity.
2. The double-layer silencer for compressor exhaust as described in claim 1, characterized in that, The muffler package includes a front muffler package and a rear muffler package, which are assembled together to form the muffler package.
3. The double-layer silencer for compressor exhaust as described in claim 2, characterized in that, The front half of the sound-absorbing packaging is fitted onto the front end face of the perforated partition, and the rear half of the sound-absorbing packaging is fitted onto the rear end face of the perforated partition.
4. The double-layer silencer for compressor exhaust as described in claim 3, characterized in that, The front end face of the perforated partition is provided with several first slots along the circumferential direction, and the edge of the front half of the sound-absorbing bag is engaged with the first slots. The rear end face of the perforated partition is provided with several second slots along the circumferential direction, and the edge of the rear half of the sound-absorbing bag is engaged with the second slots.
5. The double-layer silencer for compressor exhaust according to any one of claims 1 to 4, characterized in that, The housing includes a front half and a rear half, which are assembled together to form the housing.
6. The double-layer silencer for compressor exhaust as described in claim 5, characterized in that, An assembly step is provided at the edge of the rear half shell, and the edge of the front half shell is assembled on the assembly step.
7. The double-layer silencer for compressor exhaust as described in claim 6, characterized in that, The edge of the front half of the shell is welded to the assembly step.
8. The double-layer silencer for compressor exhaust as described in claim 1, characterized in that, The exhaust ports are arranged in multiple rows along the circumference of the muffler, and each row of exhaust ports is arranged in multiple rows along the axial direction of the muffler.
9. The double-layer silencer for compressor exhaust as described in claim 1, characterized in that, The first diversion hole is located in the middle of the perforated partition, and the second diversion hole is located at the edge of the perforated partition.
10. A compressor, characterized in that, The compressor is equipped with a double-layer silencer for exhaust as described in any one of claims 1 to 9.