Compressor two-stage expansion muffler
By using a two-stage expansion muffler structure and a flow divider design, the problems of compressor noise control and performance balance are solved, resulting in noise reduction, simplification of the refrigerant path, prevention of liquid slugging, and improvement of compressor reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXIPERA COMPRESSOR
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-09
AI Technical Summary
Existing compressor silencers struggle to achieve a good balance between noise control and performance. In particular, improved noise control leads to a more complex refrigerant path, which can cause the liquid slugging valve plate to break.
The muffler adopts a two-stage expansion structure. By setting up a flow divider and a resonant cavity inside the muffler, noise is absorbed by the semi-directional flow of the flow divider and the resonance of the resonant cavity. Combined with the simplification of the refrigerant path, the air inlet pipe is designed to form an angle with the flow divider to block the liquid phase refrigerant and ensure smooth refrigerant flow.
It effectively reduces the main noise frequency band, simplifies the refrigerant flow line, prevents liquid slugging, improves compressor reliability, and maintains good noise reduction effect.
Smart Images
Figure CN224339137U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a compressor muffler structure, and more specifically, to a compressor two-stage expansion muffler. Background Technology
[0002] There are three methods and measures for controlling compressor noise: sound absorption, sound insulation, and noise reduction. Sound absorption refers to the absorption of some sound energy by the object when sound waves are incident on its surface, converting it into other forms of energy and thus reducing noise. Sound insulation involves enclosing the noise source, confining the noise to a small space, and blocking the propagation of sound. Noise reduction involves fixing porous materials in a certain way into the inner wall of the airflow channel to reduce aerodynamic noise. In practice, one or more measures can be taken to control noise depending on the type of noise source and the actual situation. Typically, mufflers are installed to control the intake and exhaust noise of the compressor. However, in compressor noise control, a good balance between noise control and performance is difficult to achieve, especially given the persistent problem of compressor noise.
[0003] For example, Chinese Patent Publication No. CN219622887U, published on September 1, 2023, discloses a utility model entitled "Silencer, Compressor, and Refrigeration Equipment." This application discloses a silencer structure for a compressor, including a housing and a silencer pipe. The housing has an inlet, an outlet, a first cavity communicating with the inlet, and a second cavity communicating with the outlet. The silencer pipe is disposed within the housing and has a first end and a second end arranged opposite to each other. The first end of the silencer pipe communicates with the first cavity, and the second end communicates with the outlet. The second end of the silencer pipe is connected to the inner wall of the second cavity. The silencer pipe is a straight pipe and has a through hole communicating with the second cavity. This solution, by using a straight pipe for the silencer pipe, shortens the length of the pipe along the flow path, significantly reducing friction resistance and improving the flow efficiency of the gaseous refrigerant, thereby improving the silencer's noise reduction performance and reducing the compressor's suction noise. However, this solution cannot balance compressor noise control and performance. Although the noise reduction effect is improved, the internal refrigerant path is more complex. Especially for gas-liquid mixed refrigerants, the liquid refrigerant will cause liquid slugging on the valve plates inside the compressor, leading to valve plate breakage. Utility Model Content
[0004] This invention overcomes the problem of the inability to properly balance compressor performance and noise in existing silencers, especially the problem of compressor noise. It proposes a two-stage expansion silencer for compressors. This solution ensures that there are sufficient noise reduction measures in the inner cavity of the silencer, and also ensures that the refrigerant path is simplified enough, which is in line with improving the reliability of the compressor.
[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a compressor two-stage expansion muffler, including a muffler cavity, an inlet pipe outside the muffler cavity, and a diversion cavity inside the muffler cavity corresponding to the output end of the inlet pipe. A diversion hole is provided on the cavity wall of the diversion cavity, and the diversion cavity is connected to the inlet pipe. The diameters of both the diversion hole and the inlet pipe are smaller than the internal space size of the diversion cavity. The diversion cavity is connected to the inlet pipe of the muffler, providing a semi-directional flow guidance effect for the refrigerant entering the muffler. The internal space size of the diversion cavity is larger than the cross-sectional area of the inlet pipe but smaller than the internal volume of the muffler cavity. The refrigerant enters from the inlet pipe into the diversion cavity, and then from the diversion cavity into the muffler cavity, forming a two-stage expansion impedance muffler structure, which has a noise filtering effect. In addition, the diversion cavity has a certain barrier effect on the liquid phase refrigerant, which can prevent a large amount of liquid phase refrigerant from being directly sucked into the compressor valve assembly, reducing the possibility of liquid slugging of the valve plates. This solution ensures that there are sufficient noise reduction measures in the muffler cavity, and also ensures that the refrigerant path is simplified enough, which is in line with improving the reliability of the compressor.
[0006] Preferably, the direction of the intake pipe is arranged at an angle to the direction of the diversion hole, with the angle ranging from 0° to 90°. When the direction of the intake pipe forms an angle with the direction of the diversion hole in the diversion cavity, the refrigerant entering from the intake pipe collides with the inner wall of the diversion cavity, causing the liquid phase of the refrigerant to adhere to the inside of the diversion cavity, thus improving the barrier effect against liquid refrigerant. When the angle is 0°, the intake direction of the intake pipe is the same as the flow direction of the diversion hole, which facilitates refrigerant passage and simplifies the path.
[0007] Preferably, the bottom of the flow divider cavity is provided with a fixing seat, which is fixedly connected to the muffler cavity. The fixing seat is used to fix the flow divider cavity and provide an installation position for the flow divider cavity.
[0008] Preferably, the flow divider cavity is provided with an air inlet that communicates with the air inlet pipe. The flow divider cavity can be designed as a rectangular cavity or a circular cavity, or other shapes, which can improve the barrier effect of the flow divider cavity on the liquid phase medium in the refrigerant. The air inlet is used to introduce the refrigerant medium into the flow divider cavity.
[0009] Preferably, the system also includes a first housing and a second housing, which cooperate to form the muffler cavity. A resonant cavity is provided inside the second housing on the side away from the diversion cavity. After assembly, the first and second housings form the muffler cavity. The resonant cavity can resonate and absorb noise within a certain frequency range, and also has the function of regulating and balancing air pressure.
[0010] Preferably, the first housing is provided with an outlet pipe that penetrates the first housing, the bottom of the outlet pipe extending into the interior of the muffler cavity, and the top of the outlet pipe forming a bend. The outlet pipe is used to pass the refrigerant in the compressor muffler into the compressor valve assembly, and the bottom of the outlet pipe is located inside the muffler cavity to form a tubular silencing structure, which can eliminate or reduce noise of a certain frequency.
[0011] Preferably, the ratio of the air inlet area of the diversion cavity to the orifice area of the air inlet pipe is 0.01 to 1000.
[0012] Preferably, the top of the diversion cavity is provided with a first diversion hole, and the axial overlap between the first diversion hole and the air outlet pipe is 0% to 100%.
[0013] Preferably, the flow divider cavity is provided with a second flow divider hole on the side away from the air inlet, and the ratio of the area of the second flow divider hole to the area of the opposite muffler cavity is 0.001 to 0.9.
[0014] Preferably, the bottom of the second housing is also provided with a drip hole. The drip hole at the bottom of the second housing can discharge the liquid refrigerant from the muffler cavity into the compressor muffler cavity.
[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) the two-stage expansion silencer structure can reduce noise in the main target noise frequency band; (2) while maintaining the noise reduction effect, the semi-directional flow guidance effect of the flow divider cavity makes the silencer hold a relatively simple refrigerant flow line, ensuring the performance requirements of the compressor; (3) when there is liquid refrigerant in the system, the double obstruction of the flow divider cavity and the inner wall of the silencer makes it difficult for the liquid refrigerant to reach the outlet directly, thus preventing liquid slugging and protecting the valve group. Attached Figure Description
[0016] Figure 1 This is an exploded view of the present invention.
[0017] Figure 2 This is a cross-sectional view of the present invention along the positions of the air intake pipe and the flow divider.
[0018] Figure 3 This is a schematic diagram of the structure of the first housing of this utility model.
[0019] Figure 4 This is a schematic diagram of the internal structure of the second housing of this utility model.
[0020] Figure 5 This is an isometric view of the present invention.
[0021] In the figure: 1. First housing, 2. Second housing, 3. Silencer cavity, 4. Inlet pipe, 5. Diverter cavity, 6. Fixing base, 7. Resonance cavity, 8. Outlet pipe, 9. Inlet hole, 10. First diverter hole, 11. Second diverter hole, 12. Drip hole, 13. Leakage hole. Detailed Implementation
[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.
[0023] Example 1: As Figures 1 to 5 The compressor two-stage expansion muffler shown includes a first housing 1 and a second housing 2, which are snapped together vertically, forming a muffler cavity 3 inside the first housing 1 and the second housing 2. The vertical length of the second housing 2 is much greater than the vertical length of the first housing 1. The second housing 2 and the first housing 1 are located on the left and right sides (...). Figure 1 or Figure 2 The surfaces of the first and second housings (in the indicated direction) are curved, forming concave surfaces on the front and convex surfaces on the rear. An air intake pipe 4 is installed on the outer wall of the second housing 2, connecting to the interior of the second housing 2, i.e., connecting to the muffler cavity 3. A flow divider cavity 5 is installed on the inner wall of the second housing 2, corresponding to the position of the air intake pipe 4. An air inlet 9 is located on the side of the flow divider cavity 5 that is in contact with the inner wall of the second housing 2, connecting to the output end of the air intake pipe 4. Several flow divider holes are also provided on the surface of the flow divider cavity 5. The air intake pipe 4 directly connects to the interior of the flow divider cavity 5, which in turn connects to the muffler cavity 3 through the flow divider holes. Among them, the area of the pipe hole of the intake pipe 4 is smaller than the volume inside the diversion cavity 5, and the area of the diversion hole on the diversion cavity 5 is smaller than the space size inside the muffler cavity 3. That is to say, the intake pipe 4 to the diversion cavity 5 forms an expansion structure, and the diversion cavity 5 to the muffler cavity 3 also forms an expansion structure. Thus, the intake pipe 4 to the muffler cavity 3 forms a two-stage expansion structure.
[0024] The intake pipe 4 allows refrigerant from the compressor to enter, while the distribution chamber 5 allows refrigerant to be introduced into the muffler cavity 3 from multiple directions. After the compressor refrigerant enters the muffler cavity 3 from the intake pipe 4, it forms a two-stage expansion impedance silencing effect, which filters the noise and effectively reduces it.
[0025] Furthermore, a fixing seat 6 is provided on the inner wall of the second housing 2. The fixing seat 6 is fixedly connected to the inner wall of the second housing 2. The position of the fixing seat 6 corresponds to the position of the output end of the air inlet pipe 4. The fixing seat 6 can provide an installation position for the flow divider 5, ensuring that the flow divider 5 can be firmly fixed on the inner wall of the second housing 2, preventing the compressor refrigerant from impacting the flow divider 5 and causing it to loosen.
[0026] In this embodiment, the flow divider cavity 5 has a rectangular cuboid structure, which makes it easier for the flow divider cavity 5 to fit snugly against the inner wall of the second housing 2, and for the bottom of the flow divider cavity 5 to form a stable installation with the fixing base 6. Flow divider holes are provided on the remaining surfaces of the flow divider cavity 5. After the refrigerant enters the flow divider cavity 5, it flows out through each flow divider hole into the muffler cavity 3. It should be noted that in this design, the intake pipe 4 and the flow divider cavity 5 are arranged at an angle, with the intake pipe 4 facing towards the convex side of the second housing 2; specifically, as shown... Figure 2 As shown, the intake pipe 4 and the intake port 9 of the distribution chamber 5 are at the same horizontal level, and the intake direction of the intake pipe 4 forms an angle with the direction of the distribution port of the distribution chamber 5. This way, when the refrigerant enters the distribution chamber 5 from the intake pipe 4, it does not directly enter the muffler cavity 3 through the distribution port, but instead collides with the cavity wall of the distribution chamber 5 before being discharged through the distribution port. This improves the barrier effect of the distribution chamber 5 on the liquid phase of the refrigerant. The refrigerant contains both gaseous and liquid phases, forming a gas-liquid mixture.
[0027] It should also be noted that the diversion holes on the front and rear sides, the left side, and the top of the diversion chamber 5 are directly opposite the side walls of the second housing 2 in various directions. After exiting through these diversion holes, the refrigerant can collide with the side walls of the second housing 2, further reducing the liquid phase component in the refrigerant. Reducing the liquid phase component in the refrigerant decreases the possibility of liquid slugging into the compressor valve assembly, thereby improving the reliability of the refrigeration compressor.
[0028] A resonant cavity 7 is provided on the second housing 2 on the side away from the diversion cavity 5. The resonant cavity 7 is arranged vertically. The top of the resonant cavity 7 is connected to the muffler cavity 3. A leakage hole 13 is provided at the bottom of the resonant cavity 7. The bottom of the resonant cavity 7 is slightly higher than the bottom of the second housing 2. The resonant cavity 7 can balance the pressure difference between the internal cavity of the muffler and the compressor housing, prevent the muffler from breaking, and also has a certain noise reduction efficiency.
[0029] A drip hole 12 is also provided at the bottom of the second housing 2, which can discharge the liquid refrigerant in the muffler cavity 3. It should be noted that the leakage hole 13 at the bottom of the resonance cavity 7 and the drip hole 12 at the bottom of the second housing 2 connect the muffler cavity 3 with the inner cavity of the compressor housing, realizing the pressure balance capability of the resonance cavity; in addition, it also allows the liquid lubricating oil and unre-vaporized liquid refrigerant accumulated in the muffler cavity 3 during compressor operation to be discharged from the muffler cavity 3.
[0030] The top of the first housing 1 is provided with an outlet pipe 8. The bottom of the outlet pipe 8 is located inside the muffler cavity 3, and the top of the outlet pipe 8 is located outside the muffler cavity 3. The top of the outlet pipe 8 forms a bend, so that the outlet direction of the outlet pipe 8 is horizontal. The compressor refrigerant enters from the inlet pipe 4 into the distribution chamber 5 and then into the muffler cavity 3, and finally flows from the outlet pipe 8 to the valve assembly, which greatly simplifies the refrigerant route.
[0031] This solution enables the positioning and installation of the flow divider 5 structure, achieving not only noise control and a semi-finished simplified refrigerant flow line, but also, to a certain extent, liquid-phase refrigerant isolation. When the gas-liquid mixed refrigerant enters the muffler, the flow divider 5 delivers refrigerant in multiple directions. Through its cooperation with the inlet pipe 4 of the second housing 2, the liquid-phase refrigerant is isolated by the rigid wall and the flow divider 5 itself, allowing the liquid-phase refrigerant to be re-vaporized within the cavity and then delivered to the outlet pipe 8. On the other hand, the liquid refrigerant from the system that has not been re-vaporized is discharged from the muffler cavity 3 through the drip hole 12 of the second housing 2 of the muffler.
[0032] Example 2: Figures 1 to 5 The compressor two-stage expansion muffler shown includes a first housing 1 and a second housing 2, which are snapped together vertically, forming a muffler cavity 3 inside the first housing 1 and the second housing 2. The vertical length of the second housing 2 is much greater than the vertical length of the first housing 1. The second housing 2 and the first housing 1 are located on the left and right sides (...). Figure 1 or Figure 2 The surfaces of the first and second housings (in the indicated direction) are curved, forming concave surfaces on the front and convex surfaces on the rear. An air intake pipe 4 is installed on the outer wall of the second housing 2, connecting to the interior of the second housing 2, i.e., connecting to the muffler cavity 3. A flow divider cavity 5 is installed on the inner wall of the second housing 2, corresponding to the position of the air intake pipe 4. An air inlet 9 is located on the side of the flow divider cavity 5 that is in contact with the inner wall of the second housing 2, connecting to the output end of the air intake pipe 4. Several flow divider holes are also provided on the surface of the flow divider cavity 5. The air intake pipe 4 directly connects to the interior of the flow divider cavity 5, which in turn connects to the muffler cavity 3 through the flow divider holes. Among them, the area of the pipe hole of the intake pipe 4 is smaller than the volume inside the diversion cavity 5, and the area of the diversion hole on the diversion cavity 5 is smaller than the space size inside the muffler cavity 3. That is to say, the intake pipe 4 to the diversion cavity 5 forms an expansion structure, and the diversion cavity 5 to the muffler cavity 3 also forms an expansion structure. Thus, the intake pipe 4 to the muffler cavity 3 forms a two-stage expansion structure.
[0033] The intake pipe 4 allows refrigerant from the compressor to enter, while the distribution chamber 5 allows refrigerant to be introduced into the muffler cavity 3 from multiple directions. After the compressor refrigerant enters the muffler cavity 3 from the intake pipe 4, it forms a two-stage expansion impedance silencing effect, which filters the noise and effectively reduces it.
[0034] Furthermore, a fixing seat 6 is provided on the inner wall of the second housing 2. The fixing seat 6 is fixedly connected to the inner wall of the second housing 2. The position of the fixing seat 6 corresponds to the position of the output end of the air inlet pipe 4. The fixing seat 6 can provide an installation position for the flow divider 5, ensuring that the flow divider 5 can be firmly fixed on the inner wall of the second housing 2, preventing the compressor refrigerant from impacting the flow divider 5 and causing it to loosen.
[0035] In this embodiment, the diversion cavity 5 has a rectangular cuboid structure, which makes it easier for the diversion cavity 5 to fit snugly against the inner wall of the second housing 2, and for the bottom of the diversion cavity 5 to form a stable installation with the fixing seat 6. Diversion holes are provided on the remaining surfaces of the diversion cavity 5. The diversion hole on the top surface of the diversion cavity 5 is the first diversion hole 10, and the diversion hole on the side wall of the diversion cavity 5 away from the intake pipe 4 is the second diversion hole 11. After the refrigerant enters the diversion cavity 5, it flows out from each diversion hole into the muffler cavity 3. It should be noted that in this design, the intake pipe 4 and the diversion cavity 5 are arranged at an angle, with the intake pipe 4 facing towards the convex side of the second housing 2; specifically, as shown... Figure 2 As shown, the intake pipe 4 and the intake port 9 of the distribution chamber 5 are at the same horizontal level, and the intake direction of the intake pipe 4 forms an angle with the direction of the distribution port of the distribution chamber 5. This way, when the refrigerant enters the distribution chamber 5 from the intake pipe 4, it does not directly enter the muffler cavity 3 through the distribution port, but instead collides with the cavity wall of the distribution chamber 5 before being discharged through the distribution port. This improves the barrier effect of the distribution chamber 5 on the liquid phase of the refrigerant. The refrigerant contains both gaseous and liquid phases, forming a gas-liquid mixture.
[0036] It should be noted that the number of diversion holes on each surface of the diversion cavity 5 can be one or more, specifically, the number can be designed from 1 to 100, and the area of a single diversion hole ranges from 0.001 mm. 3 Up to 200mm 3 Furthermore, the ratio of the area of the air inlet 9 of the flow divider 5 to the area of the inlet of the air intake pipe 4 is between 0.01 and 1000. When the ratio of the area of the air inlet 9 of the flow divider 5 to the area of the inlet of the air intake pipe 4 is 1, it indicates that the area of the air inlet 9 of the flow divider 5 is the same as the area of the inlet of the air intake pipe 4. When the ratio is less than 1, it indicates that the area of the air inlet 9 of the flow divider 5 is less than the area of the inlet of the air intake pipe 4, in which case a multi-hole design can be used. When the ratio is greater than 1, it indicates that the area of the air inlet 9 of the flow divider 5 is greater than the area of the inlet of the air intake pipe 4, which is generally the case where the compressor housing is larger (i.e., the second housing size on the muffler is larger).
[0037] Furthermore, the second diversion hole 11 faces the wall surface of the second housing 2 located away from the diversion cavity 5, and the ratio of the area of the second diversion hole 11 to the wall area of the opposite muffler cavity 3 is 0.001 to 0.9. A ratio less than 1 indicates that an expansion structure is formed between the diversion cavity 5 and the muffler cavity 3. When the ratio is much less than 1, it is a multi-hole design. The size design of the other diversion holes can also be the same as that of the second diversion hole 11. In this embodiment, the ratio of the area of the muffler's air inlet hole to the area of the diversion hole on the diversion cavity, the ratio of the area of the diversion hole on the diversion cavity to the area of the muffler cavity, and the ratio of the area of the muffler cavity to the area of the air outlet are all between 0.05 and 100.
[0038] It should also be noted that the diversion holes on the front and rear sides of the diversion chamber 5, the first diversion hole 10, and the second diversion hole 11 are respectively facing the side walls of the second housing 2 in various directions. After the refrigerant exits from these diversion holes, it can also collide with the side walls of the second housing 2, which can further reduce the liquid phase component in the refrigerant. Reducing the liquid phase component in the refrigerant reduces the possibility of refrigerant liquid slugging into the compressor valve assembly, thereby improving the reliability of the refrigeration compressor.
[0039] A resonant cavity 7 is provided on the second housing 2 on the side away from the diversion cavity 5. The resonant cavity 7 is arranged vertically. The top of the resonant cavity 7 is connected to the muffler cavity 3. A leakage hole 13 is provided at the bottom of the resonant cavity 7. The bottom of the resonant cavity 7 is slightly higher than the bottom of the second housing 2. The resonant cavity 7 can balance the pressure difference between the internal cavity of the muffler and the compressor housing, prevent the muffler from breaking, and also has a certain noise reduction efficiency.
[0040] A drip hole 12 is also provided at the bottom of the second housing 2, which can discharge the liquid refrigerant in the muffler cavity 3. It should be noted that the leakage hole 13 at the bottom of the resonance cavity 7 and the drip hole 12 at the bottom of the second housing 2 connect the muffler cavity 3 with the inner cavity of the compressor housing, realizing the pressure balance capability of the resonance cavity; in addition, it also allows the liquid lubricating oil and unre-vaporized liquid refrigerant accumulated in the muffler cavity 3 during compressor operation to be discharged from the muffler cavity 3.
[0041] The top of the first housing 1 is provided with an outlet pipe 8. The bottom of the outlet pipe 8 is located inside the muffler cavity 3, and the top of the outlet pipe 8 is located outside the muffler cavity 3. The top of the outlet pipe 8 forms a bend, so that the outlet direction of the outlet pipe 8 is horizontal. The compressor refrigerant enters from the inlet pipe 4 into the distribution chamber 5 and then into the muffler cavity 3, and finally flows from the outlet pipe 8 to the valve assembly, which greatly simplifies the refrigerant route.
[0042] The position of the exhaust pipe 8 can be completely offset from the first diversion hole 10 on the diversion cavity 5. At this time, the axial overlap between the exhaust pipe 8 and the first diversion hole 10 is 0%. When the position of the exhaust pipe 8 is completely aligned with the position of the first diversion hole 10 on the diversion cavity 5, the axial overlap between the exhaust pipe 8 and the first diversion hole 10 is 100%. The overlap between the exhaust pipe 8 and the first diversion hole 10 is between 0% and 100%. By designing the relative position of the two, different noise reduction effects can be changed, thereby corresponding to different working conditions.
[0043] This solution enables the positioning and installation of the flow divider 5 structure, achieving not only noise control and a semi-finished simplified refrigerant flow line, but also, to a certain extent, liquid-phase refrigerant isolation. When the gas-liquid mixed refrigerant enters the muffler, the flow divider 5 delivers refrigerant in multiple directions. Through its cooperation with the inlet pipe 4 of the second housing 2, the liquid-phase refrigerant is isolated by the rigid wall and the flow divider 5 itself, allowing the liquid-phase refrigerant to be re-vaporized within the cavity and then delivered to the outlet pipe 8. On the other hand, the liquid refrigerant from the system that has not been re-vaporized is discharged from the muffler cavity 3 through the drip hole 12 of the second housing 2 of the muffler.
Claims
1. A compressor two-stage expansion muffler, characterized in that, The device includes a muffler cavity, an air inlet pipe on the outside of the muffler cavity, a flow divider cavity on the inside of the muffler cavity and corresponding to the output end of the air inlet pipe, a flow divider hole on the cavity wall of the flow divider cavity, the flow divider cavity being connected to the air inlet pipe, and the diameters of the flow divider hole and the air inlet pipe being smaller than the internal space size of the flow divider cavity.
2. The compressor two-stage expansion silencer according to claim 1, characterized in that, The direction of the intake pipe is arranged at an angle to the direction of the diversion hole, with the angle ranging from 0° to 90°.
3. A compressor two-stage expansion silencer according to claim 1, characterized in that, The bottom of the diversion cavity is provided with a fixed seat, which is fixedly connected to the muffler cavity.
4. A compressor two-stage expansion silencer according to any one of claims 1 to 3, characterized in that, The flow divider is provided with an air inlet that communicates with the air inlet pipe.
5. A compressor two-stage expansion muffler according to claim 4, characterized in that, It also includes a first housing and a second housing, the first housing and the second housing cooperate to form the muffler cavity, and a resonant cavity is provided in the second housing on the side away from the diversion cavity.
6. A compressor two-stage expansion muffler according to claim 5, characterized in that, The first housing is provided with an exhaust pipe that penetrates the first housing, the bottom of the exhaust pipe extends into the interior of the muffler cavity, and the top of the exhaust pipe forms a bend.
7. A compressor two-stage expansion silencer according to claim 4, characterized in that, The ratio of the area of the air inlet of the diversion chamber to the area of the air inlet pipe is 0.01 to 1000; the ratio of the area of the air inlet pipe to the area of the diversion hole, the ratio of the area of the diversion hole to the area of the muffler cavity, and the ratio of the area of the muffler cavity to the area of the air outlet are all 0.05 to 100.
8. A compressor two-stage expansion muffler according to claim 6, characterized in that, The top of the diversion chamber is provided with a first diversion hole, and the axial overlap between the first diversion hole and the air outlet pipe is 0% to 100%.
9. A compressor two-stage expansion muffler according to claim 4, characterized in that, The flow divider cavity is provided with a second flow divider hole on the side away from the air inlet hole, and the area of the second flow divider hole is 0.001 to 0.9 times the area of the opposite muffler cavity.
10. A compressor two-stage expansion muffler according to claim 5, characterized in that, The bottom of the second housing is also provided with a drip hole.