A reciprocating compressor silencer

Abstract

This invention discloses a reciprocating compressor muffler in the field of refrigerator compressor technology, comprising a housing and an isolating component. The housing has an air inlet and an air outlet. The isolating component is disposed inside the housing, dividing the inner cavity of the housing into an upper cavity and a lower cavity. The upper cavity communicates with the air outlet, and the lower cavity communicates with the air inlet. Multiple reflective ribs are disposed on the inner wall of the top of the housing, dividing the upper cavity into multiple chambers. An air inlet hole communicating with the upper and lower cavities is provided on the isolating component, and the air inlet hole and the air outlet are located in the same chamber. The bottom sides of the multiple reflective ribs are inclined relative to the horizontal plane, and the inclination angles of the bottom sides of the multiple reflective ribs are all different. There are gaps between the bottom sides of the multiple reflective ribs and the isolating component, and the widths of the gaps between the multiple reflective ribs and the isolating component are all different. This invention solves the technical problem that existing devices cannot simultaneously improve air intake efficiency and reduce noise, thus improving both air intake efficiency and noise reduction performance.

Description

Technical Field

[0001] This invention relates to the field of refrigerator compressor technology, and more particularly to a reciprocating compressor muffler. Background Technology

[0002] Most refrigerator compressors are reciprocating compressors, which use a motor to drive a crank-connecting rod mechanism, converting the motor's rotational motion into the linear motion of a piston. During this process, gaseous refrigerant enters the cylinder through an intake muffler. Inside the cylinder, the refrigerant is compressed by the piston, changing from a low-temperature, low-pressure state to a high-temperature, high-pressure state. Cooling is achieved through heat exchange via phase change. Refrigerator energy efficiency and cabinet noise are both key areas for innovation and pain points for users. The individual performance and noise level of the refrigerator's built-in compressor play a decisive role in the overall quality of the refrigerator system.

[0003] In a compressor system, the internal structure of the suction muffler affects the flow rate of refrigerant participating in the refrigeration cycle, thus affecting the compressor performance. A complex internal structure can often reduce airflow pulsation and thus reduce noise, but a significant reduction in suction volume will reduce the amount of refrigerant participating in the cycle, and the compressor performance cannot be improved. An overly simple internal design will result in excessive noise, making it unusable in practice.

[0004] Existing silencers primarily reduce noise by extending the gas path from the intake port to the exhaust port, thereby altering the refrigerant gas flow rate. When the gas flow rate slows down, the noise generated by airflow pulsation decreases. For example, the serpentine intake silencer reduces noise, but it also significantly reduces the gas delivery volume, thus affecting compressor efficiency and causing performance degradation. Summary of the Invention

[0005] To address the technical problem that existing technologies cannot simultaneously improve intake efficiency and reduce noise, this invention provides a reciprocating compressor silencer with high intake efficiency and good noise reduction performance.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A reciprocating compressor silencer includes a housing and an isolator. The housing has an inlet and an outlet. The isolator is located inside the housing and divides the inner cavity of the housing into an upper cavity and a lower cavity. The upper cavity is connected to the outlet, and the lower cavity is connected to the inlet. Multiple reflective ribs are provided on the inner wall of the top of the housing, which divide the upper cavity into multiple chambers. An inlet hole is provided on the isolator to connect the upper and lower cavities. The inlet hole and the outlet are located in the same chamber. The bottom sides of the multiple reflective ribs are inclined relative to the horizontal plane, and the inclination angles of the bottom sides of the multiple reflective ribs are all different. There are gaps between the bottom sides of the multiple reflective ribs and the isolator, and the widths of the gaps between the multiple reflective ribs and the isolator are all different.

[0008] Furthermore, multiple reflective ribs are arranged alternately from left to right. Some reflective ribs have their bottom side inclined high end pointing towards the front, while other reflective ribs have their bottom side inclined high end pointing towards the rear.

[0009] Furthermore, the angle of the inclined high end of the bottom side of the reflective rib on the left side of the air outlet points forward, while the angle of the inclined high end of the bottom side of the reflective rib on the right side of the air outlet points backward.

[0010] Furthermore, the tilt angle of the bottom side of the reflective rib is 20°-50°.

[0011] Furthermore, the lower cavity is equipped with a silencing device, which is a hollow structure with an exhaust port at the upper end and multiple intake ports at the lower end. The intake ports penetrate the side wall of the silencing device and are connected to the exhaust port. The exhaust port of the silencing device is connected to the air inlet of the isolation component.

[0012] Furthermore, the air intake holes are spaced apart at the lower end of the silencer, with a diameter of 0.3mm-1mm.

[0013] Furthermore, the bottom of the muffler is provided with a supplementary air intake hole that runs through the bottom wall of the muffler. The supplementary air intake hole is connected to the exhaust hole, and the diameter of the supplementary air intake hole is 2mm-4mm.

[0014] Furthermore, the volumes of the multiple chambers are all different, and the volume of the chamber where the air inlet is located is at least half the volume of the upper chamber.

[0015] Furthermore, the isolation component is equipped with an oil outlet, which connects the upper and lower cavities.

[0016] Furthermore, it also includes an air intake tube, the first end of which is connected to the air inlet, and the second end of which has a flared section. Along the flow direction of the airflow within the flared section, the cross-sectional area of ​​the flared section gradually decreases.

[0017] The beneficial effects of this invention are:

[0018] 1. By using an isolator to divide the housing into an upper and lower chamber, the structure is simple. Airflow enters the lower chamber through the inlet, then enters the inner chamber through the inlet hole of the isolator, and finally exits through the outlet on the upper chamber. This does not increase the transmission path from the inlet to the outlet, thus reducing pressure damage and effectively improving suction performance. It also effectively guides airflow and reduces airflow pulsation, thereby reducing noise. Simultaneously, multiple reflective ribs with different bottom side inclination angles are set on the inner wall of the top of the housing. Because the gap width between the reflective ribs and the isolator varies, sound waves of different bands can interfere and cancel each other out between these reflective ribs. The airflow undergoes multiple reflections and diffusions within the multiple chambers of the upper chamber, further reducing noise. This design significantly reduces operating noise without sacrificing suction efficiency, improving the overall performance of the refrigerator compressor and the user experience.

[0019] 2. By tilting the reflective ribs in a specific direction—that is, some of the bottom edges of the reflective ribs are tilted so that the higher end points towards the lower end and the lower end points towards the front, while the other part points towards the rear—more complex reflections and interferences occur when different frequencies of sound waves entering the silencer encounter these reflective ribs. This design helps to enhance the mutual interference between different frequencies of sound waves, thereby more effectively canceling out noise.

[0020] 3. Setting the tilt angle of the bottom side of the reflective ribs within the range of 20°-50° can more effectively guide the airflow, allowing sound waves of different bands to interfere and cancel each other out between these reflective ribs. The multiple reflections and diffusion of the airflow inside the muffler further reduce noise while maintaining high intake efficiency.

[0021] 4. A silencer is added to the lower chamber. The silencer has a hollow structure and is equipped with multiple air intake holes and one exhaust hole. This design can ensure sufficient air intake and effectively avoid the generation of vortices, thus preventing a decrease in air intake efficiency due to vortex loss.

[0022] 5. Layout and size of the air intake holes: The air intake holes are arranged in multiple rows and columns at intervals, and the diameter is controlled between 0.3mm and 1mm. This design can increase the air intake area and improve the air intake efficiency. At the same time, the weak turbulence effect generated by the small aperture can disperse and consume sound energy, reduce the transmission of sound waves, further reduce noise, and effectively avoid the generation of eddies, thus avoiding the decrease in air intake efficiency due to eddy loss.

[0023] 6. A supplementary air intake hole is set at the bottom of the muffler. This not only makes up for the insufficient air intake that may be caused by the main air intake hole, but also helps to recover the refrigerant oil condensed on the inner wall of the muffler into the lower chamber, reducing the oil discharge problem of the compressor and improving the stability and reliability of the system.

[0024] 7. By ensuring that the volume of the chamber containing the air inlet is at least half the volume of the upper chamber, sufficient air intake space is ensured, which helps to improve air intake efficiency and also helps to smooth the airflow transition and reduce noise.

[0025] 8. The oil outlet on the isolation component allows the refrigerant oil entering the upper chamber to be discharged in a timely manner, preventing excessive accumulation of refrigerant oil from affecting the operation of the muffler.

[0026] 9. The flared design of the inhalation tube can effectively improve inhalation efficiency and reduce pressure loss during inhalation. Attached Figure Description

[0027] Figure 1 This is an exploded structural diagram of the reciprocating compressor silencer of the present invention;

[0028] Figure 2 This is a schematic diagram of the upper part of the shell;

[0029] Figure 3 This is a structural diagram of the upper part of the shell from another angle;

[0030] Figure 4 This is an assembly diagram of the isolation component and the silencer;

[0031] Figure 5 This is a structural schematic diagram of the isolation component;

[0032] Figure 6 This is a schematic diagram of the silencer device;

[0033] Figure 7 This is a schematic diagram of the lower part of the shell;

[0034] The markings in the diagram are as follows: 1-shell, 2-isolation piece, 3-air inlet, 4-air outlet, 5-upper cavity, 6-lower cavity, 7-reflective rib, 8-air inlet, 9-silencing device, 91-exhaust port, 92-intake port, 93-supplementary intake port, 10-oil outlet, 11-intake pipe, 111-flared section. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the present invention will be further described below with reference to the accompanying drawings.

[0036] First, it should be stated that the technical solutions of the embodiments of this application are clearly and completely described. The described embodiments are only some of the embodiments of this application, and not a limitation of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of this invention, it should be understood that the terms "first," "second," "upper," "lower," "left," "right," "inner," "outer," "axial," or "radial," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this invention.

[0038] It should be noted that, in this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" 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 invention according to the specific circumstances.

[0039] Reference Figures 1 to 7 The present invention provides a reciprocating compressor silencer.

[0040] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the reciprocating compressor silencer includes a housing 1 and an isolation member 2. The housing 1 has an air inlet 3 and an air outlet 4. The isolation member 2 is disposed inside the housing 1 and divides the inner cavity of the housing 1 into an upper cavity 5 and a lower cavity 6. The upper cavity 5 is connected to the air outlet 4, and the lower cavity 6 is connected to the air inlet 3. Multiple reflective ribs 7 are provided on the inner wall of the top of the housing 1. The multiple reflective ribs 7 divide the upper cavity 5 into multiple chambers. An air inlet 8 is provided on the isolation member 2 to connect the upper cavity 5 and the lower cavity 6. The air inlet 8 and the air outlet 4 are located in the same chamber. The bottom sides of the multiple reflective ribs 7 are inclined relative to the horizontal plane. The inclination angles of the bottom sides of the multiple reflective ribs 7 are all different. There is a gap between the bottom sides of the multiple reflective ribs 7 and the isolation member 2. The gap widths between the multiple reflective ribs 7 and the isolation member 2 are all different.

[0041] This design uses an isolator 2 to divide the housing 1 into an upper chamber 5 and a lower chamber 6. Air is drawn in through the inlet 3 into the lower chamber 6, then passes through the inlet hole 8 of the isolator 2 into the upper chamber 5, and finally exits through the outlet 4 of the upper chamber 5. Since the inlet hole 8 and the outlet 4 are located in the same chamber, the reflective ribs 7 do not affect the intake efficiency, and sufficient airflow still exits through the outlet 4. This simple design effectively reduces pressure loss and improves intake performance. Furthermore, other airflow entering the upper chamber 5 is neutralized by the reflective ribs 7 inside the upper chamber 5, which interfere with and cancel out different wavebands of sound. Simultaneously, the airflow undergoes multiple reflections and diffusions between the multiple reflective ribs 7 within the upper chamber 5, effectively reducing airflow pulsation and further reducing noise. Thus, while improving intake efficiency, this design significantly reduces operating noise, enhancing the overall performance of the refrigerator compressor and the user experience.

[0042] For multiple reflective ribs 7, this refers to two or more, such as... Figure 3 As shown, this scheme preferably uses four reflective ribs 7. Multiple reflective ribs 7 can be arranged sequentially from left to right at intervals, or they can be randomly distributed in the upper cavity 5, dividing the upper cavity 5 into five chambers. The bottom sides of the four reflective ribs 7 are inclined relative to the horizontal plane, and the inclination angles of the bottom sides of the four reflective ribs 7 are all different. There are gaps between the bottom sides of the four reflective ribs 7 and the isolation member 2, and the gap widths between the four reflective ribs 7 and the isolation member 2 are all different. The five chambers allow sound waves to have more opportunities to be reflected and absorbed, thereby improving the noise reduction performance. At the same time, the four reflective ribs 7 can cause sound waves of different frequencies to produce an interference effect when passing through the gaps, which helps the sound waves cancel each other out and achieve a better noise reduction effect.

[0043] For the bottom side of the reflective rib 7 to be inclined relative to the horizontal plane, it is preferable that multiple reflective ribs 7 are arranged alternately from left to right. For some reflective ribs 7, the inclined high end of the bottom side points towards the inclined low end, pointing forward; for others, the inclined high end of the bottom side points towards the inclined low end, pointing backward. More specifically, the inclined high end of the bottom side of the reflective rib 7 on the left side of the air outlet 4 points towards the inclined low end, pointing forward; and the inclined high end of the bottom side of the reflective rib 7 on the right side of the air outlet 4 points towards the inclined low end, pointing backward. Alternatively, they can be arranged in a staggered manner, with one reflective rib 7 pointing towards the inclined low end, pointing forward, and another pointing towards the inclined low end, pointing backward, and so on. Other inclination directions can also be chosen, such as those between front-back and left-right. No particular limitation is made here, as long as it achieves the goal of interfering and canceling out sound waves of different bands.

[0044] like Figure 3As shown, in some embodiments, the tilt angle of the bottom side of the reflective rib 7 is 20°-50°. Setting the tilt angle of the bottom side of the reflective rib 7 within the range of 20°-50° can more effectively guide the airflow, allowing sound waves of different bands to interfere and cancel each other out between these reflective ribs 7. The multiple reflections and diffusions of the airflow inside the silencer further reduce noise while maintaining high intake efficiency.

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the lower cavity 6 is provided with a silencing device 9. The silencing device 9 has a hollow structure, with an exhaust port 91 at the upper end and multiple air intake ports 92 at the lower end. The air intake ports 92 penetrate through the side wall of the silencing device 9 and are connected to the exhaust port 91. The exhaust port 91 of the silencing device 9 is connected to the air inlet port 8 of the isolation member 2.

[0046] A silencing device 9 is added to the lower cavity 6. The silencing device 9 has a hollow structure, with an exhaust port 91 at the upper end and multiple air intake ports 92 penetrating the side wall of the silencing device 9 at the lower end. The air intake ports 92 and the exhaust ports 91 are connected through the hollow structure. The exhaust ports 91 of the silencing device 9 are preferably connected to the air inlet port 8 of the isolation component 2 by ultrasonic welding. This design can ensure sufficient air intake and effectively avoid the generation of eddies, thus preventing a decrease in air intake efficiency due to eddy current losses.

[0047] like Figure 6 As shown, in some embodiments, the air intake holes 92 are spaced apart and distributed at the lower end of the silencer 9, with a diameter of 0.3mm-1mm. The air intake holes 92 are spaced apart and distributed around the lower end of the silencer 9, or they can be distributed in a honeycomb pattern. The diameter of the multiple rows and columns of air intake holes 92 is controlled between 0.3mm and 1mm. This design can increase the air intake area and improve the air intake efficiency. At the same time, the weak turbulence effect generated by the small aperture can disperse and consume sound energy, reduce the transmission of sound waves, further reduce noise, and effectively avoid the generation of eddies, thus avoiding the decrease in air intake efficiency due to eddy current loss.

[0048] like Figure 6 As shown, in some embodiments, the bottom of the muffler 9 is provided with a supplementary suction hole 93 that penetrates the bottom wall of the muffler 9. The supplementary suction hole 93 is connected to the exhaust hole 91, and the diameter of the supplementary suction hole 93 is 2mm-4mm. Providing a supplementary suction hole 93 at the bottom of the muffler 9 not only compensates for any insufficient suction that may be caused by the main suction hole 92, but also helps to recover the refrigerant oil condensed on the inner wall of the muffler 9 back to the lower chamber 6, reducing oil discharge problems from the compressor and improving the stability and reliability of the system.

[0049] like Figure 2and Figure 3 As shown, in some embodiments, the volumes of the multiple chambers are not the same, and the volume of the chamber containing the air inlet 8 is at least half the volume of the upper chamber 5. The fact that the volume of the chamber containing the air inlet 8 is at least half the volume of the upper chamber 5 ensures sufficient intake space. This larger intake space can accommodate the gas entering through the air inlet 8, which helps improve intake efficiency. The chamber containing the air inlet 8 also contains sufficient gas to be discharged towards the air outlet 4, which helps to ensure a smooth airflow transition and reduce noise.

[0050] like Figure 5 As shown, in some embodiments, the isolation member 2 is provided with an oil outlet 10, which connects the upper cavity 5 and the lower cavity 6. The oil outlet 10 on the isolation member 2 allows the refrigerant oil entering the upper cavity 5 to be discharged in a timely manner, preventing excessive accumulation of refrigerant oil from affecting the operation of the muffler.

[0051] like Figure 7 As shown, in some embodiments, an inhalation tube 11 is also included. The first end of the inhalation tube 11 is connected to the air inlet 3, and the second end of the inhalation tube 11 has a flared portion 111. Along the flow direction of the airflow within the flared portion 111, the cross-sectional area of ​​the flared portion 111 gradually decreases. The design of the flared portion 111 of the inhalation tube 11 can effectively improve the inhalation efficiency and reduce pressure loss during the inhalation process.

Claims

1. A reciprocating compressor silencer characterized by: The utility model relates to a sound insulation device, including casing (1) and isolator (2), casing (1) has air inlet (3) and air outlet (4), and isolator (2) is arranged in casing (1) inside, and isolator (2) separates the inner chamber of casing (1) and divides into upper chamber (5) and lower chamber (6), and upper chamber (5) is communicated with air outlet (4), and lower chamber (6) is communicated with air inlet (3), and the inner wall on the top of casing (1) is provided with multiple reflection rib plate (7), and multiple reflection rib plate (7) is arranged from left to right in sequence and interval, and multiple reflection rib plate (7) separates upper chamber (5) and divides into multiple chambers, and the air inlet hole (8) of communicating upper chamber (5) and lower chamber (6) is set up on isolator (2), and air inlet hole (8) is in the same chamber with air outlet (4), The bottom side of multiple reflection rib plate (7) is arranged relative to the horizontal plane and is inclined, and the inclination angles of the bottom sides of multiple reflection rib plate (7) are all different, the high end of the inclined bottom side of the reflection rib plate (7) on the left side of air outlet (4) points to the front side in the direction of the low end, the high end of the inclined bottom side of the reflection rib plate (7) on the right side of air outlet (4) points to the rear side in the direction of the low end, the bottom sides of multiple reflection rib plate (7) have gaps with isolator (2), the gap widths of multiple reflection rib plate (7) with isolator (2) are all different, the volumes of the multiple chambers are all different, and the volume of the chamber where air inlet hole (8) is located is at least half of the volume of upper chamber (5). Lower chamber (6) is provided with a sound attenuation device (9), which is a hollow structure, the upper end of which is an exhaust hole (91), and the lower end of which is provided with a plurality of air inlet holes (92) penetrating the side wall of the sound attenuation device (9), the air inlet holes (92) are in communication with the exhaust hole (91), the exhaust hole (91) of the sound attenuation device (9) is in communication with the air inlet hole (8) of the isolator (2), and the bottom of the sound attenuation device (9) is provided with a supplementary air inlet hole (93) penetrating the bottom wall of the sound attenuation device (9), the supplementary air inlet hole (93) is in communication with the exhaust hole (91), and the diameter of the supplementary air inlet hole (93) is 2mm-4mm.

2. A reciprocating compressor silencer as claimed in claim 1, characterized in that: The inclination angle of the bottom side of the reflection rib plate (7) is 20°-50°.

3. A reciprocating compressor silencer as claimed in claim 1, characterized in that: The air inlet holes (92) are arranged in interval at the lower end of the sound attenuation device (9), and the diameter of the air inlet holes (92) is 0.3mm-1mm.

4. A reciprocating compressor silencer as defined in claim 1, wherein: The isolator (2) is provided with an oil outlet hole (10) that connects the upper chamber (5) and the lower chamber (6).

5. A reciprocating compressor silencer as defined in claim 1 wherein: It also includes an air suction pipe (11), the first end of which is in communication with the air inlet (3), the second end of which has an expanded portion (111), and the flow cross-sectional area of the expanded portion (111) gradually decreases along the flow direction of the air flow in the expanded portion (111).

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