Muffler, compressor and refrigeration apparatus

Abstract

This invention discloses a muffler, a compressor, and a refrigeration device, relating to the field of compressor technology. The muffler includes a housing with a silencing cavity formed within it. An air inlet and an air outlet communicating with the silencing cavity are provided at the upper end of the housing. An air inlet pipe is provided at the air inlet, extending into the lower part of the silencing cavity. An oil leakage hole is provided at the bottom of the housing, and the housing has a first sidewall facing the compressor body. The oil leakage hole is located at the bottom of the first sidewall. This invention aims to provide a muffler structure that effectively prevents lubricating oil from flowing in when the compressor is tilted.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a muffler, compressor, and refrigeration equipment. Background Technology

[0002] With the increasing popularity of in-vehicle refrigerators in passenger and commercial vehicles, they have become an important feature for enhancing driving comfort. However, under the constraints of limited vehicle space and complex operating conditions, compressor refrigeration systems face multiple technical bottlenecks. These include the issue that the tilting posture of a vehicle during driving can easily lead to abnormal oil intake inside the muffler cavity, causing increased oil discharge from the compressor and threatening system reliability. Therefore, there is an urgent need for a muffler structural design that improves adaptability to tilting conditions and meets the core requirements of efficient and reliable operation of in-vehicle refrigerators. Summary of the Invention

[0003] The main objective of this invention is to provide a muffler, compressor, and refrigeration equipment, with the aim of providing a muffler structure that effectively prevents lubricating oil from flowing in when the compressor is tilted.

[0004] To achieve the above objectives, the present invention provides a muffler, wherein the muffler comprises: The housing has a silencing cavity inside. The upper end of the housing is provided with an air inlet and an air outlet that communicate with the silencing cavity. An air inlet pipe is provided at the air inlet and extends into the lower part of the silencing cavity. An oil leakage hole is provided at the bottom of the housing. The housing has a first sidewall facing the compressor body. The oil leakage hole is located at the bottom of the first sidewall.

[0005] In one embodiment, a partition is provided inside the housing, which divides the silencing cavity into an upper cavity and a lower cavity. The partition has a through hole and a connecting hole. The air inlet pipe connects to the lower cavity through the through hole, the connecting hole connects the upper cavity and the lower cavity, and the air outlet connects to the upper cavity.

[0006] In one embodiment, ribs are provided circumferentially along the through hole, and the ribs are located at the upper and / or lower ends of the partition.

[0007] In one embodiment, a connecting pipe is provided at the communicating hole, with the upper end of the connecting pipe extending into the upper cavity and / or the lower end of the connecting pipe extending into the lower cavity.

[0008] In one embodiment, the connecting pipe has an opening in its wall, and the opening communicates with the upper cavity.

[0009] In one embodiment, the bottom of the housing has a plurality of interconnected stepped portions, and the plurality of stepped portions are staggered in the horizontal direction.

[0010] In one embodiment, the housing includes an upper shell and a lower shell connected to each other. The upper shell and the lower shell are fastened together by a fastening structure, and the fastening structure includes a first fastening part and a second fastening part that are nested together. The first fastening part and the second fastening part are disposed at the edges of the upper shell and the lower shell, and the first fastening part and the second fastening part are welded and sealed.

[0011] In one embodiment, an exhaust pipe is provided on the outside of the housing at a position corresponding to the air outlet, and the exhaust pipe is used to cooperate with the compressor cylinder head.

[0012] In one embodiment, the exhaust pipe is provided with a limiting protrusion.

[0013] The present invention also proposes a compressor, wherein the compressor includes a muffler, the muffler includes a housing with a muffler cavity formed therein, the upper end of the housing is provided with an air inlet and an air outlet communicating with the muffler cavity, and an air inlet pipe is provided at the air inlet, the air inlet pipe extending into the lower part of the muffler cavity, an oil leakage hole is provided at the bottom of the housing, and the housing has a first sidewall facing the compressor body, the oil leakage hole being located at the bottom of the first sidewall.

[0014] The present invention also proposes a refrigeration device, wherein the refrigeration device includes a compressor, the compressor includes a muffler, the muffler includes a housing with a silencing cavity formed therein, the upper end of the housing is provided with an air inlet and an air outlet communicating with the silencing cavity, and an air inlet pipe is provided at the air inlet, the air inlet pipe extends into the lower part of the silencing cavity, an oil leakage hole is provided at the bottom of the housing, and the housing has a first sidewall facing the compressor body, the oil leakage hole is provided at the bottom of the first sidewall.

[0015] In the technical solution of the present invention, based on achieving the resistance silencing function, the structural layout of the air inlet pipe and the oil leakage hole is optimized to take into account both gas-liquid separation and anti-tilting backflow. Specifically, the silencing cavity serves as an expansion cavity, utilizing the reflection and interference of sound waves by abrupt changes in cross-section. The air inlet pipe extends from the top to the bottom of the silencing cavity, which not only extends the airflow path and enhances the attenuation effect of low-frequency sound waves, but also utilizes gravity to allow oil droplets to fall naturally, preventing oil from being carried out with the exhaust. At the same time, the air outlet is located at the top to ensure smooth gas discharge. The oil drain hole is located at the bottom of the first sidewall facing the compressor body. During normal operation, it can drain accumulated oil. When the compressor is tilted towards the compressor body, the space on the compressor body side is larger, and the oil will flow into the larger space, preventing the oil level from rising. In addition, the height of the oil drain hole is raised, thus effectively preventing oil from flowing back into the muffler cavity. When the compressor is tilted in the opposite direction, the first sidewall is raised, which also prevents oil from flowing back into the muffler cavity. Therefore, regardless of the tilt direction, the oil drain hole is higher than the external oil level, effectively preventing oil from flowing back into the muffler cavity and avoiding weakening the muffler performance due to oil ingress. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a planar structure of an embodiment of the muffler provided by the present invention; Figure 2 This is a schematic diagram of another planar structure of a muffler according to an embodiment of the present invention; Figure 3 This is an exploded view of the planar structure of an embodiment of the silencer provided by the present invention.

[0018] Explanation of icon numbers: 100. Muffler; 1. Housing; 11. Muffler cavity; 11a. Upper cavity; 11b. Lower cavity; 12. Air inlet; 121. Air inlet pipe; 13. Air outlet; 131. Exhaust pipe; 132. Limiting protrusion; 14. Oil leakage hole; 15. First side wall; 16. Stepped part; 17. Upper shell; 18. Lower shell; 19. Fastening structure; 191. First fastening part; 192. Second fastening part; 2. Partition; 21. Through hole; 22. Connecting hole; 221. Connecting pipe; 222. Opening; 23. Oil passage hole; 24. Rib.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] With the increasing popularity of in-vehicle refrigerators in passenger and commercial vehicles, they have become an important feature for enhancing driving comfort. However, under the constraints of limited vehicle space and complex operating conditions, compressor refrigeration systems face multiple technical bottlenecks. These include the issue that the tilting posture of a vehicle during driving can easily lead to abnormal oil intake inside the muffler cavity, causing increased oil discharge from the compressor and threatening system reliability. Therefore, there is an urgent need for a muffler structural design that improves adaptability to tilting conditions and meets the core requirements of efficient and reliable operation of in-vehicle refrigerators.

[0024] In view of this, the present invention proposes a muffler, a compressor, and a refrigeration device. Please refer to [link / reference]. Figures 1 to 3 The following is an embodiment of the muffler proposed in this application. The muffler will be described in detail below with reference to the specific drawings.

[0025] Please see Figures 1 to 3 The muffler 100 includes a housing 1, which has a muffler cavity 11. The upper end of the housing 1 is provided with an air inlet 12 and an air outlet 13 communicating with the muffler cavity 11. An air inlet pipe 121 is provided at the air inlet 12 and extends into the lower part of the muffler cavity 11. An oil leakage hole 14 is provided at the bottom of the housing 1. The housing 1 has a first side wall 15 facing the compressor body. The oil leakage hole 14 is located at the bottom of the first side wall 15.

[0026] In the technical solution of the present invention, based on achieving the resistance silencing function, the structural layout of the air inlet pipe 121 and the oil leakage hole 14 is optimized to take into account both gas-liquid separation and anti-tilting backflow. Specifically, the silencing cavity 11 serves as an expansion cavity, utilizing cross-sectional abrupt reflection and interference of sound waves. The air inlet pipe 121 extends from the top to the bottom of the silencing cavity 11, which not only extends the airflow path and enhances the attenuation effect of low-frequency sound waves, but also utilizes gravity to allow oil droplets to fall naturally, preventing oil from being carried out with the exhaust. At the same time, the air outlet 13 is located at the top to ensure smooth gas discharge. The oil drain hole 14 is located at the bottom of the first sidewall 15 facing the compressor body. During normal operation, it can drain accumulated oil. When the compressor is tilted towards the compressor body, the space on the compressor body side is larger, and the oil will flow to the larger space, so that the oil level will not rise. On the other hand, the height of the oil drain hole 14 is raised, thus effectively preventing oil from flowing back into the muffler cavity 11. When the compressor is tilted in the opposite direction, the first sidewall 15 is raised, which also prevents oil from flowing back into the muffler cavity 11. Therefore, regardless of the tilt direction, the oil drain hole 14 is higher than the external oil level, effectively preventing oil from flowing back into the muffler cavity 11 and avoiding the weakening of the muffler performance due to oil ingress.

[0027] Specifically, a partition 2 is provided inside the housing 1, which divides the silencing cavity 11 into an upper cavity 11a and a lower cavity 11b. The partition 2 has a through hole 21 and a connecting hole 22. The air inlet pipe 121 connects to the lower cavity 11b through the through hole 21, and the connecting hole 22 connects the upper cavity 11a and the lower cavity 11b. The air outlet 13 connects to the upper cavity 11a. In this embodiment, the partition 2 divides the silencing cavity 11 into the upper cavity 11a and the lower cavity 11b, forming a two-stage expansion cavity series structure, which significantly enhances the resistance silencing effect. The intake pipe 121 connects to the lower chamber 11b via the through hole 21 on the partition 2, causing the airflow to undergo an initial abrupt expansion in the lower chamber 11b. Sound waves are reflected and attenuated, while oil is deposited at the bottom of the lower chamber 11b and discharged through the oil drain hole 14. Subsequently, the gas enters the upper chamber 11a through the connecting hole 22 on the partition 2, undergoing another abrupt expansion and reflection, further reducing residual pulsating noise. The outlet 13 is located at the top of the upper chamber 11a, ensuring smooth gas flow and preventing oil carryover. This configuration, with the upper chamber 11a and lower chamber 11b connected in series, extends the airflow path, improving low-frequency noise reduction and utilizing gravity for multi-stage gas-liquid separation, preventing oil from entering the outlet 13. Combined with the tilted anti-backflow design of the oil drain hole 14 described above, the silencer 100 achieves integrated functions of wideband noise reduction, reliable oil return, and tilt protection within a compact space.

[0028] In addition, an oil passage hole 23 is provided on the partition plate 2. The oil passage hole 23 mainly solves the problem of oil accumulation in the upper chamber 11a, ensuring the long-term reliability of the silencer 100. During the gas-liquid separation process, a small amount of oil mist may enter the upper chamber 11a with the airflow and gradually condense on the upper surface of the partition plate 2. If it cannot be discharged, the accumulated oil will raise the liquid level and may be sucked into the air outlet 13, resulting in excessive oil. At the same time, the oil occupying the volume of the upper chamber 11a will weaken the silencing effect of the expansion chamber. The oil passage hole 23 allows the oil accumulated in the upper chamber 11a to flow back to the lower chamber 11b by gravity, and finally return to the compressor through the oil leakage hole 14 at the bottom of the housing 1, realizing the recycling of oil. In addition, the size and position of the oil passage hole 23 are designed to ensure smooth oil return while avoiding a significant acoustic short-circuit effect on the sound wave propagation between the upper chamber 11a and the lower chamber 11b, making its impact on low-frequency silencing performance negligible.

[0029] Specifically, a rib 24 is provided circumferentially along the through hole 21, and the rib 24 is located at the upper end and / or lower end of the partition 2. Specifically, by adding the rib 24 circumferentially to the through hole 21 of the partition 2, the structural function of the muffler 100 is further optimized. The rib 24 located at the upper end of the partition 2 can cooperate with the air intake pipe 121 to position the air intake pipe 121, and even be used for the junction of the air intake pipe 121 and the partition 2. The sealing at the point ensures that the air intake pipe 121 is accurately aligned with the through hole 21 and reduces air leakage, avoiding acoustic short circuits. The rib 24 located at the lower end of the partition 2 extends downward, effectively lengthening the insertion depth of the air intake pipe 121, bringing the airflow outlet closer to the bottom of the lower cavity 11b. This extends the sound wave propagation path, enhances low-frequency reflection and attenuation, and guides oil droplets in the oil-gas mixture to deposit more fully at the bottom of the lower cavity 11b, improving gas-liquid separation efficiency. This design achieves an equivalent increase in the insertion pipe length within a limited space, strengthening the resistance to noise reduction and ensuring the assembly reliability of the partition 2 and the air intake pipe 121. In this embodiment, the rib 24 is provided at both the upper and lower ends of the partition 2.

[0030] Furthermore, a connecting pipe 221 is provided at the connecting hole 22, with the upper end of the connecting pipe 221 extending into the upper cavity 11a and / or the lower end of the connecting pipe 221 extending into the lower cavity 11b. The connecting pipe 221, with one or both ends extending into the upper cavity 11a and / or the lower cavity 11b, essentially constructs a Helmholtz resonant neck, thereby introducing a parallel resonant sound absorption mechanism between the two expansion cavities. The connecting pipe 221, acting as the neck of the resonator, together with the upper cavity 11a or the lower cavity 11b (which serves as the resonant cavity volume), forms a spring-mass system. This system can efficiently absorb specific low-frequency pulsations such as the compressor's fundamental frequency or its harmonics, significantly broadening the noise reduction band. Simultaneously, the extension length of the connecting pipe 221 also functions as an insertion tube, effectively eliminating the passing frequency that may occur when the expansion cavities are connected in series by changing the impedance conditions at the sound wave inlet and outlet, thus preventing noise reduction failure. If only one end of the connecting pipe 221 extends into the cavity, the reflection from that end is primarily utilized. If both ends extend into the cavity, the acoustic boundaries of the upper cavity 11a and the lower cavity 11b are optimized, resulting in stronger reflection and more thorough filtering. Furthermore, the connecting pipe 221 can extend the airflow path, reduce regenerated noise, and work in conjunction with the air intake pipe 121, the partition 2, and the ribs 24 on the partition 2 to achieve a wide-bandwidth, efficient, and compact composite noise reduction design without increasing the volume of the housing 1.

[0031] Furthermore, the connecting pipe 221 has an opening 222 in its wall, and the opening 222 communicates with the upper cavity 11a. Specifically, the connecting pipe 221 has an opening 222 in its wall that connects to the upper cavity 11a. In essence, the connecting pipe 221 and the upper cavity 11a form a side-branched Helmholtz resonator. The opening 222 serves as the resonant neck, and the upper cavity 11a serves as the resonant volume. When sound waves propagate in the connecting pipe 221, energy at a specific frequency (determined by the cross-sectional area of ​​the opening 222, the length of the neck, and the volume of the upper cavity 11a) will excite the elastic vibration of the air in the upper cavity 11a through the opening 222. This energy is then converted into heat energy through viscous friction and consumed, thereby achieving narrowband strong absorption of the compressor's fundamental frequency or a certain harmonic. At the same time, since the upper end of the connecting pipe 221 extends into the upper cavity 11a, the opening 222 is equivalent to adding a parallel bypass path for the sound waves, forming a dual-channel interference with the upper outlet. This can effectively disrupt the original passing frequency in the series structure of the expansion cavity and avoid noise reduction failure. In addition, the opening 222 can guide some airflow into the upper cavity 11a in advance, optimize the pressure pulsation distribution of the upper cavity 11a and the lower cavity 11b, reduce airflow regeneration noise, and work in conjunction with the partition 2, the air inlet pipe 121 and other structures to achieve a wide-band, multi-mode composite noise reduction effect.

[0032] Furthermore, the bottom of the housing 1 has multiple interconnected stepped portions 16, which are horizontally staggered. By providing multiple interconnected and horizontally staggered stepped portions 16 at the bottom of the housing 1, the housing 1 is adapted to the internal space of the compressor, thereby maximizing the volume of the silencing cavity 11. Specifically, the compressor has a complex mechanical structure. When the compressor is small, the silencer 100 should make full use of the space inside the compressor. However, the silencer 100 with a flat bottom is difficult to fit the internal structure of the compressor, resulting in a small housing 1 that cannot fully utilize the space inside the compressor. In this embodiment, the staggered stepped portions 16 allow the housing 1 to be embedded in the gaps inside the compressor, expanding the effective volume of the silencing cavity 11 without increasing the overall size of the compressor. A larger cavity volume can lower the cutoff frequency of the expansion cavity, enhance the attenuation capability of low-frequency pulsating noise, and provide a longer propagation path and more reflection and scattering interfaces for sound waves, disrupting the internal standing wave distribution and avoiding silencing failure at specific frequencies. Furthermore, the horizontally offset design of the stepped portion 16 guides the accumulated oil at the bottom to flow orderly towards the oil drain hole 14, preventing oil stagnation. The local abrupt change in the stepped portion 16 also increases turbulent dissipation of the airflow, further reducing regeneration noise. This structure achieves a synergistic improvement in space utilization, acoustic performance, and oil return reliability within the compact compressor.

[0033] Furthermore, the housing 1 includes an upper shell 17 and a lower shell 18 connected to each other. The upper shell 17 and the lower shell 18 are fastened together by a fastening structure 19, which includes a first fastening part 191 and a second fastening part 192 that are nested together. The first fastening part 191 and the second fastening part 192 are respectively disposed on the edges of the upper shell 17 and the lower shell 18, and the first fastening part 191 and the second fastening part 192 are welded and sealed. By designing the housing 1 of the muffler 100 as a separate upper shell 17 and lower shell 18, and adopting a combination of nested fastening and welding sealing connection, both assembly convenience and connection reliability are taken into account, and the molding and demolding of the upper shell 17 and the lower shell 18 are also facilitated. Specifically, the interlocking first fastening part 191 and second fastening part 192 can be quickly pre-positioned before welding to avoid misalignment. This is particularly suitable for the silencer 100 proposed in this application, which has an internal partition 2 and a connecting pipe 221 at the air inlet 12. This allows the partition 2 to be stably clamped between the upper shell 17 and the lower shell 18, while the air inlet pipe 121 is accurately aligned with the protruding rib 24 on the partition 2. In addition, the interlocking structure of the first fastening part 191 and the second fastening part 192 increases the welding contact area, enabling the formation of a more uniform and high-strength fusion layer. This layer can withstand the periodic pressure pulsations in the silencer cavity 11 during compressor operation, preventing air leakage or cracking. Meanwhile, the overlapping design of the first fastening part 191 and the second fastening part 192 at the fastening point can provide a larger welding space, which facilitates the welding operation of the first fastening part 191 and the second fastening part 192. In this embodiment, a welding wire is set between the first fastening part 191 and the second fastening part 192. The gap between the first fastening part 191 and the second fastening part 192 is filled by melting the welding wire, thereby realizing the welding and fixing of the first fastening part 191 and the second fastening part 192. Compared with the snap or screw connection, the welding process after fastening proposed in this embodiment simplifies the assembly process and greatly improves the long-term durability and sealing performance of the muffler 100 in the high temperature and high pressure oil mist environment.

[0034] Furthermore, an exhaust pipe 131 is provided on the outer side of the housing 1 at a position corresponding to the air outlet 13. The exhaust pipe 131 is used to mate with the compressor cylinder head. By placing the exhaust pipe 131 at the air outlet 13 and directly mates with the compressor cylinder head, a compact, direct-connection design between the muffler 100 and the cylinder head is achieved. The exhaust pipe 131 serves as a transition interface between the air outlet 13 and the cylinder head intake channel, eliminating the need for additional intermediate pipes. This significantly shortens the airflow path, reduces flow resistance and pressure loss, and helps improve the compressor's energy efficiency. Simultaneously, the direct-connection structure reduces the number of joints, effectively preventing gas leakage and noise radiation caused by pipe vibration or seal aging. Furthermore, the mating surface between the exhaust pipe 131 and the cylinder head can be designed as a flange or plug-in type, facilitating precise alignment during assembly and ensuring airtightness using gaskets or interference fits. This integrated layout not only saves installation space within the compressor housing 1, but also allows the pulsating airflow discharged from the muffler 100 to quickly enter the cylinder, reducing sound wave reflection and energy dissipation in intermediate stages, thereby maintaining the transmission loss characteristics expected in the design of the muffler 100 and ensuring the overall noise reduction effect.

[0035] Furthermore, a limiting protrusion 132 is provided on the exhaust pipe 131. Adding the limiting protrusion 132 to the exhaust pipe 131 achieves the dual functions of preventing mistaken installation and precise positioning. The limiting protrusion 132 can form an interference fit with the corresponding groove or step on the compressor cylinder head, ensuring that the muffler 100 can only be installed in the correct orientation during assembly, avoiding misconnection of the muffler 100 due to incorrect installation. Simultaneously, the limiting protrusion 132 provides a clear limit during insertion, allowing the exhaust pipe 131 to be accurately inserted into the air intake hole of the cylinder head, ensuring uniform force on the sealing ring or gasket, and preventing leakage or stress concentration due to misalignment. This structure integrates mistaken-proof design and pipeline positioning, improving the reliability and efficiency of the overall assembly.

[0036] The present invention also proposes a compressor, which includes the silencer 100. The specific structure of the silencer 100 is as described in the above embodiments. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0037] This invention also proposes a refrigeration device, which includes the compressor. The specific structure of the compressor is as described in the above embodiments. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. Specifically, the refrigeration device in this application is configured as a vehicle refrigerator.

[0038] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A silencer, characterized in that, include: The housing has a silencing cavity inside. The upper end of the housing is provided with an air inlet and an air outlet that communicate with the silencing cavity. An air inlet pipe is provided at the air inlet and extends into the lower part of the silencing cavity. An oil leakage hole is provided at the bottom of the housing. The housing has a first sidewall facing the compressor body. The oil leakage hole is located at the bottom of the first sidewall.

2. The silencer as described in claim 1, characterized in that, The housing is provided with a partition, which divides the silencing cavity into an upper cavity and a lower cavity. The partition has a through hole and a connecting hole. The air inlet pipe connects to the lower cavity through the through hole, the connecting hole connects the upper cavity and the lower cavity, and the air outlet connects to the upper cavity.

3. The silencer as described in claim 2, characterized in that, A raised rib is provided along the circumference of the through hole, and the raised rib is provided at the upper end and / or lower end of the partition.

4. The silencer as described in claim 2, characterized in that, A connecting pipe is provided at the communicating hole, with the upper end of the connecting pipe extending into the upper cavity and / or the lower end of the connecting pipe extending into the lower cavity.

5. The silencer as described in claim 4, characterized in that, The connecting pipe has an opening in its wall, and the opening communicates with the upper cavity.

6. The silencer as described in claim 1, characterized in that, The bottom of the housing has multiple interconnected stepped sections, and these stepped sections are staggered in the horizontal direction.

7. The silencer as described in claim 1, characterized in that, The housing includes an upper shell and a lower shell that are connected to each other. The upper shell and the lower shell are fastened together by a fastening structure. The fastening structure includes a first fastening part and a second fastening part that are nested together. The first fastening part and the second fastening part are located at the edges of the upper shell and the lower shell, and the first fastening part and the second fastening part are welded and sealed.

8. The silencer as described in claim 1, characterized in that, An exhaust pipe is provided on the outside of the housing at a position corresponding to the air outlet, and the exhaust pipe is used to cooperate with the compressor cylinder head.

9. The silencer as described in claim 8, characterized in that, The exhaust pipe is provided with a limiting protrusion.

10. A compressor, characterized in that, Includes the silencer as described in any one of claims 1-9.

11. A refrigeration device, characterized in that, Includes the compressor as described in claim 10.

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