Silencer of reciprocating compressor

Abstract

The reciprocating compressor silencer comprises a shell and a separator, the shell is provided with an air inlet and an air outlet, the separator is arranged in the shell and divides an inner cavity of the shell into an upper cavity and a lower cavity, the upper cavity is communicated with the air outlet, the lower cavity is communicated with the air inlet, and the air inlet is communicated with the air outlet. A plurality of reflecting rib plates are arranged on the inner wall of the top of the shell and divide the upper cavity into a plurality of cavities, an air inlet hole communicated with the upper cavity and the lower cavity is formed in the separator, the air inlet hole and the air outlet are located in the same cavity, and the side edges of the bottoms of the reflecting rib plates are obliquely arranged relative to the horizontal plane. The inclination angles of the bottom side edges of the multiple reflection rib plates are different, gaps are formed between the bottom side edges of the multiple reflection rib plates and the isolation piece, and the widths of the gaps between the multiple reflection rib plates and the isolation piece are different. The technical problem that an existing device cannot give consideration to improvement of the air suction efficiency and reduction of noise is solved, and the air suction efficiency and the noise reduction performance are improved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator compressors, and in particular to a reciprocating compressor muffler. Background Art

[0002] Most refrigerator compressors are reciprocating compressors, which convert the motor's rotational motion into the piston's linear motion through a motor-driven crank-connecting rod mechanism. During this process, the gaseous refrigerant enters the cylinder through the suction muffler, and the refrigerant is compressed by the piston in the cylinder. The refrigerant changes from a low-temperature and low-pressure state to a high-temperature and high-pressure state, and the refrigerant achieves refrigeration through phase change heat exchange. Refrigerator energy efficiency and cabinet noise are both key innovation directions and user pain points, and the performance and noise of the built-in compressor of the refrigerator play a decisive role in the quality of the entire refrigerator system.

[0003] In the compressor system, the internal structure of the suction muffler affects the flow rate of the refrigerant participating in the refrigeration cycle, thereby affecting the performance of the compressor. The complex internal structure can often reduce the air flow pulsation to achieve the purpose of reducing noise, but a significant reduction in the suction volume will reduce the amount of refrigerant participating in the circulation, and the compressor performance cannot be improved. An overly simple internal design will cause loud noise and cannot be used in practice.

[0004] Existing silencers basically reduce noise by extending the path of the gas from the intake port to the exhaust port, thereby changing the refrigerant gas flow rate. When the gas flow rate slows down, the noise generated by air flow pulsation decreases. For example, a serpentine tube intake silencer reduces noise, but also causes a significant reduction in gas delivery, thereby affecting the efficiency of the compressor and causing performance degradation. Summary of the invention

[0005] In order to solve the technical problem that the prior art cannot improve the suction efficiency and reduce the noise at the same time, the present invention provides a reciprocating compressor muffler with high suction efficiency and good noise reduction performance.

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

[0007] A reciprocating compressor silencer comprises a shell and an isolating member, wherein the shell has an air inlet and an air outlet, the isolating member is arranged inside the shell, the isolating member divides the inner cavity of the shell into an upper cavity and a lower cavity, the upper cavity is connected to the air outlet, and the lower cavity is connected to the air inlet, a plurality of reflective ribs are arranged on the inner wall at the top of the shell, the plurality of reflective ribs divide the upper cavity into a plurality of chambers, an air inlet hole connecting the upper cavity and the lower cavity is opened on the isolating member, the air inlet hole and the air outlet are in the same chamber, the bottom side edges of the plurality of reflective ribs are inclined relative to a horizontal plane, the inclination angles of the bottom side edges of the plurality of reflective ribs are all different, there is a gap between the bottom side edges of the plurality of reflective ribs and the isolating member, and the widths of the gaps between the plurality of reflective ribs and the isolating member are all different.

[0008] Furthermore, the plurality of reflective ribs are arranged in sequence from left to right, with the inclined high ends of the bottom sides of some reflective ribs pointing to the inclined low ends toward the front, and the inclined high ends of the bottom sides of other reflective ribs pointing to the inclined low ends toward the rear.

[0009] Furthermore, the inclined high end of the bottom side of the reflection rib on the left side of the air outlet points to the inclined low end in the direction of the front side, and the inclined high end of the bottom side of the reflection rib on the right side of the air outlet points to the inclined low end in the direction of the rear side.

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

[0011] Furthermore, the lower cavity is provided with a silencer, which is a hollow structure with an exhaust hole at the upper end and multiple intake holes at the lower end. The intake holes run through the side wall of the silencer, and the intake holes are connected to the exhaust holes. The exhaust holes of the silencer are connected to the air inlet holes of the isolation component.

[0012] Furthermore, the air intake holes are arranged at intervals and distributed at the lower end of the silencer, and the diameter of the air intake holes is 0.3mm-1mm.

[0013] Furthermore, a supplementary air intake hole penetrating through the bottom wall of the silencer is provided at the bottom of the silencer, 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 different, and the volume of the chamber where the air inlet hole is located is at least half of the volume of the upper chamber.

[0015] Furthermore, an oil outlet hole is provided on the isolating member, and the oil outlet hole connects the upper cavity and the lower cavity.

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

[0017] The beneficial effects of the present invention are:

[0018] 1. The shell is divided into an upper chamber and a lower chamber by setting a separator. The structure is simple. The airflow enters the lower chamber through the air inlet, enters the chamber through the air inlet hole of the separator, and then is discharged from the air outlet on the chamber. The transmission path from the air inlet to the air outlet is not increased. This can reduce pressure damage, effectively improve the air intake performance, effectively guide the airflow and reduce airflow pulsation, thereby reducing noise. At the same time, multiple reflective ribs with different bottom side inclination angles are set on the inner wall of the top of the shell. Since the gap widths between the reflective ribs and the separators are different, sound waves of different bands can interfere with each other between these reflective ribs and offset each other. The airflow is reflected and diffused multiple times in multiple chambers inside the upper chamber, further reducing noise. This design significantly reduces the noise during operation without sacrificing the air intake efficiency, and improves the overall performance of the refrigerator compressor and the user experience.

[0019] 2. By tilting the reflective ribs in a specific direction, that is, the bottom side of some reflective ribs is tilted so that the high end points to the low end and the other part points to the back, the sound waves of different frequencies entering the silencer can produce more complex reflections and interferences when encountering these reflective ribs. Such a design helps to strengthen the mutual interference between sound waves of different frequencies, thereby more effectively canceling out noise.

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

[0021] 4. A silencer is added to the lower chamber. The silencer adopts 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 vortexes, thus avoiding the decrease in air intake efficiency due to vortex losses.

[0022] 5. Layout and size of the air intake holes: The air intake holes are arranged in multiple rows and columns with a diameter 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 eddy currents, thereby avoiding the decrease in air intake efficiency due to eddy current losses.

[0023] 6. A supplementary air intake hole is set at the bottom of the silencer, which can not only make up for the insufficient air intake problem caused by the main air intake hole, but also help recover the refrigerant oil condensed on the inner wall of the silencer to the lower chamber, reduce the oil discharge problem of the compressor, and improve the stability and reliability of the system.

[0024] 7. By making the volume of the chamber where the air inlet is located at least half of the volume of the upper chamber, sufficient air intake space is ensured, which is beneficial to improving the air intake efficiency, and also helps to smoothly transition the airflow and reduce noise.

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

[0026] 9. The expansion design of the suction pipe can effectively improve the suction efficiency and reduce the pressure loss during the suction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the explosion structure of the reciprocating compressor muffler of the present invention;

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

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

[0030] Figure 4 It is a schematic diagram of the assembly of the isolation part and the silencer;

[0031] Figure 5 It is a schematic diagram of the structure of the isolation member;

[0032] Figure 6 It is a schematic diagram of the structure of the silencer;

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

[0034] Marked in the figure are, 1-shell, 2-isolator, 3-air inlet, 4-air outlet, 5-upper cavity, 6-lower cavity, 7-reflection rib, 8-air inlet, 9-silencer, 91-exhaust hole, 92-intake hole, 93-supplementary intake hole, 10-oil outlet, 11-intake pipe, 111-expansion part. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clearly expressed, the present invention is further described below in conjunction with the accompanying drawings.

[0036] First of all, it needs to be stated that the technical solutions of the embodiments of the present application are clearly and completely described. The described embodiments are part of the embodiments of the present application, and are not limitations of the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0037] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “first”, “second”, “upper”, “lower”, “left”, “right”, “inner”, “outer”, “axial” or “radial” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0038] It should be noted that, in the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Reference Figures 1 to 7 , the present invention provides a reciprocating compressor muffler.

[0040] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, a reciprocating compressor silencer includes a shell 1 and an isolator 2, the shell 1 has an air inlet 3 and an air outlet 4, the isolator 2 is arranged inside the shell 1, the isolator 2 divides the inner cavity of the shell 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, a plurality of reflective ribs 7 are arranged on the inner wall of the top of the shell 1, the plurality of reflective ribs 7 divide the upper cavity 5 into a plurality of chambers, an air inlet hole 8 connecting the upper cavity 5 and the lower cavity 6 is opened on the isolator 2, the air inlet hole 8 and the air outlet 4 are in the same chamber, the bottom side edges of the plurality of reflective ribs 7 are inclined relative to the horizontal plane, the inclination angles of the bottom side edges of the plurality of reflective ribs 7 are all different, the bottom side edges of the plurality of reflective ribs 7 have gaps with the isolator 2, and the gap widths of the plurality of reflective ribs 7 and the isolator 2 are all different.

[0041] In this solution, the housing 1 is divided into an upper chamber 5 and a lower chamber 6 by a partition 2. The air inlet 3 inhales the gas into the lower chamber 6, then passes through the air inlet 8 of the partition 2, enters the upper chamber 5, and is discharged through the air outlet 4 of the upper chamber 5. Since the air inlet 8 and the air outlet 4 are in the same chamber, the reflective ribs 7 do not affect the air intake efficiency, and there is still sufficient airflow to be discharged through the air outlet 4. Such a simple design structure can effectively reduce pressure loss and effectively improve the air intake performance. In addition, other airflows entering the upper chamber 5 are mutually interfered and offset by the sound waves of different bands through the reflective ribs 7 inside the upper chamber 5. At the same time, the airflow can also be reflected and diffused multiple times between the multiple reflective ribs 7 in the upper chamber 5, which effectively reduces the pulsation of the airflow and further reduces the noise. In this way, while improving the air intake efficiency, the noise during operation is significantly reduced, and the overall performance of the refrigerator compressor and the user experience are improved.

[0042] The multiple reflective ribs 7 refer to two or more reflective ribs, such as Figure 3 As shown, the present scheme preferably has four reflective ribs 7. The multiple reflective ribs 7 can be arranged in sequence from left to right, or can be randomly distributed in the upper cavity 5 to divide the upper cavity 5 into five chambers. The bottom sides of the four reflective ribs 7 are inclined relative to the horizontal plane. The inclination angles of the bottom sides of the four reflective ribs 7 are all different. There is a gap between the bottom sides of the four reflective ribs 7 and the isolation member 2. The gap widths between the four reflective ribs 7 and the isolation member 2 are all different. The five chambers are conducive to more opportunities for sound waves to be reflected and absorbed, thereby improving the sound-absorbing performance. At the same time, the four reflective ribs 7 can make sound waves of different frequencies produce an interference effect when passing through the gap, which helps to cancel each other out and achieve a better noise reduction effect.

[0043] The bottom side of the reflection rib 7 is tilted relative to the horizontal plane, preferably, a plurality of reflection ribs 7 are arranged in sequence from left to right, the tilted high end of the bottom side of some reflection ribs 7 points to the tilted low end in the direction of the front side, and the tilted high end of the bottom side of another part of the reflection ribs 7 points to the tilted low end in the direction of the rear side, more specifically, the tilted high end of the bottom side of the reflection rib 7 on the left side of the air outlet 4 points to the tilted low end in the direction of the front side, and the tilted high end of the bottom side of the reflection rib 7 on the right side of the air outlet 4 points to the tilted low end in the direction of the rear side, or the bottom side of the reflection rib 7 is cross-set, the tilted high end of the bottom side of one reflection rib 7 points to the tilted low end in the direction of the front side, and the tilted high end of the bottom side of another reflection rib 7 points to the tilted low end in the direction of the rear side, and they are cross-set in sequence; in addition, other tilting directions can also be selected, such as between front and back and left and right. It is not particularly limited here, as long as the sound waves of different bands can be interfered and offset.

[0044] like Figure 3As shown, in some embodiments, the inclination angle of the bottom side of the reflection rib 7 is 20°-50°. Setting the inclination angle of the bottom side of the reflection rib 7 within the range of 20°-50° can more effectively guide the airflow, so that sound waves of different bands can interfere with each other between these reflection ribs 7 to offset each other, and the multiple reflections and diffusions of the airflow inside the muffler further reduce the noise while maintaining a high air intake efficiency.

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the lower cavity 6 is provided with a silencer 9, which is a hollow structure, with an exhaust hole 91 at the upper end and a plurality of air intake holes 92 at the lower end. The air intake holes 92 run through the side wall of the silencer 9, and the air intake holes 92 are connected with the exhaust holes 91. The exhaust holes 91 of the silencer 9 are connected with the air inlet holes 8 of the isolation member 2.

[0046] A silencer 9 is added to the lower chamber 6. The silencer 9 is a hollow structure, with an exhaust hole 91 at the upper end and multiple air intake holes 92 penetrating the side wall of the silencer 9 at the lower end. The air intake holes 92 are connected to the exhaust holes 91 through the hollow structure. The exhaust holes 91 of the silencer 9 are preferably connected to the air inlet 8 of the isolation member 2 by ultrasonic welding. Such a design can ensure sufficient air intake, and can also effectively avoid the generation of eddy currents, thereby avoiding the reduction of air intake efficiency due to eddy current losses.

[0047] like Figure 6 As shown, in some embodiments, the air intake holes 92 are arranged at intervals and distributed at the lower end of the muffler 9, and the diameter of the air intake holes 92 is 0.3mm-1mm. The air intake holes 92 are arranged at intervals and distributed around the lower end of the muffler 9, and can also be distributed in a honeycomb shape. The diameter of the air intake holes 92 arranged at intervals in multiple rows and columns is controlled between 0.3mm-1mm. Such a 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 be used to disperse and consume sound energy, reduce the transmission of sound waves, further reduce noise, and effectively avoid the generation of eddy currents, thereby avoiding the decrease in air intake efficiency due to eddy current losses.

[0048] like Figure 6 As shown, in some embodiments, a supplementary air intake hole 93 penetrating the bottom wall of the muffler 9 is provided at the bottom of the muffler 9, the supplementary air intake hole 93 is connected to the exhaust hole 91, and the diameter of the supplementary air intake hole 93 is 2mm-4mm. Providing the supplementary air intake hole 93 at the bottom of the muffler 9 can not only supplement the problem of insufficient air intake that may be caused by the main air intake hole 92, but also help to recover the refrigerant oil condensed on the inner wall of the muffler 9 to the lower chamber 6, reduce the oil discharge problem of the compressor, and improve 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 different, and the volume of the chamber where the air inlet 8 is located is at least one-half of the volume of the upper chamber 5. The volume of the chamber where the air inlet 8 is located is at least half of the volume of the upper chamber 5, ensuring sufficient air intake space. A large air intake space can accommodate the gas entering through the air inlet 8, which is beneficial to improving the air intake efficiency. The chamber where the air inlet 8 is located contains sufficient gas to be discharged to the air outlet 4, which is conducive to the smooth transition of the airflow and reduces noise.

[0050] like Figure 5 As shown, in some embodiments, the isolating member 2 is provided with an oil outlet 10, and the oil outlet 10 connects the upper chamber 5 and the lower chamber 6. The oil outlet 10 on the isolating member 2 allows the refrigeration oil entering the upper chamber 5 to be discharged in time, preventing the refrigeration oil from accumulating too much and affecting the operation of the muffler.

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

Claims

1. A reciprocating compressor muffler, characterized in that: The invention comprises a shell (1) and an isolating member (2), wherein the shell (1) has an air inlet (3) and an air outlet (4), the isolating member (2) is arranged inside the shell (1), and the isolating member (2) divides the inner cavity of the shell (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), and a plurality of reflective ribs (7) are arranged on the inner wall of the top of the shell (1), and the plurality of reflective ribs (7) divide the upper cavity (5) into a plurality of lower cavity (6). The isolating member (2) is provided with an air inlet (8) connecting the upper chamber (5) and the lower chamber (6); the air inlet (8) and the air outlet (4) are located in the same chamber; the bottom side edges of the plurality of reflecting ribs (7) are arranged to be inclined relative to a horizontal plane; the bottom side edges of the plurality of reflecting ribs (7) have different inclination angles; the bottom side edges of the plurality of reflecting ribs (7) have gaps with the isolating member (2); and the gap widths of the plurality of reflecting ribs (7) and the isolating member (2) are different.

2. A reciprocating compressor muffler as claimed in claim 1, characterized in that: The plurality of reflective ribs (7) are arranged in sequence from left to right, with the inclined high ends of the bottom sides of some reflective ribs (7) pointing in the direction of the inclined low ends to the front side, and the inclined high ends of the bottom sides of other reflective ribs (7) pointing in the direction of the inclined low ends to the rear side.

3. A reciprocating compressor muffler as claimed in claim 2, characterized in that: The inclined high end of the bottom side of the reflection rib plate (7) on the left side of the air outlet (4) points to the direction of the inclined low end pointing to the front side, and the inclined high end of the bottom side of the reflection rib plate (7) on the right side of the air outlet (4) points to the direction of the inclined low end pointing to the rear side.

4. A reciprocating compressor muffler according to any one of claims 1 to 3, characterized in that: The inclination angle of the bottom side of the reflective rib plate (7) is 20°-50°.

5. A reciprocating compressor muffler as claimed in claim 1, characterized in that: The lower chamber (6) is provided with a silencer (9), the silencer (9) being a hollow structure, having an exhaust hole (91) at the upper end and a plurality of air intake holes (92) at the lower end, the air intake holes (92) penetrating the side wall of the silencer (9), the air intake holes (92) being connected to the exhaust holes (91), and the exhaust holes (91) of the silencer (9) being connected to the air intake holes (8) of the isolation member (2).

6. A reciprocating compressor muffler as claimed in claim 5, characterized in that: The air intake holes (92) are arranged at intervals and distributed at the lower end of the silencer (9), and the diameter of the air intake holes (92) is 0.3 mm-1 mm.

7. A reciprocating compressor muffler as claimed in claim 5, characterized in that: A supplementary air intake hole (93) penetrating the bottom wall of the silencer (9) is provided at the bottom of the silencer (9), the supplementary air intake hole (93) is connected to the exhaust hole (91), and the diameter of the supplementary air intake hole (93) is 2 mm-4 mm.

8. A reciprocating compressor muffler as claimed in claim 1, characterized in that: The volumes of the multiple chambers are all different, and the volume of the chamber where the air inlet (8) is located is at least half of the volume of the upper chamber (5).

9. A reciprocating compressor muffler as claimed in claim 1, characterized in that: An oil outlet hole (10) is provided on the isolating member (2), and the oil outlet hole (10) connects the upper chamber (5) and the lower chamber (6).

10. A reciprocating compressor muffler as claimed in claim 1, characterized in that: It also comprises an air intake pipe (11), wherein a first end of the air intake pipe (11) is connected to the air inlet (3), and a second end of the air intake pipe (11) comprises a flared portion (111), and along the flow direction of the airflow in the flared portion (111), the flow cross-sectional area of ​​the flared portion (111) gradually decreases.

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