Silencer

Abstract

The utility model discloses a silencer in the technical field of compressors, which comprises a casing and a middle partition plate, the casing is provided with an inner cavity, the middle partition plate is positioned in the inner cavity and divides the inner cavity into an upper cavity and a lower cavity, the casing is provided with an air suction port and an air outlet, the air suction port is communicated with the lower cavity, the air outlet is communicated with the upper cavity, and the upper cavity is communicated with the lower cavity. The middle partition plate is provided with an air guide hole penetrating through the upper cavity and the lower cavity, the air guide hole is communicated with the air suction port through a silencing part, the silencing part comprises at least one branch flow channel and is provided with a main flow channel, the two ends of each branch flow channel are communicated with the main flow channel, and the outlet pointing directions of the two ends of each branch flow channel are subjected to orthogonal decomposition. The two ends of each branch flow channel are each provided with a branch direction pointing to the forward flowing direction of gas, and the branch flow channels are used for guiding reverse flowing of the gas into forward flowing. The utility model solves the technical problem that the air suction efficiency is influenced by pressure loss caused by the fact that gas backflow is easily generated in the existing snake-shaped pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a muffler. Background Art

[0002] The noise of the refrigerator mainly comes from the refrigerator compressor. In order to reduce the noise of the compressor, the compressor is equipped with a muffler. The gas is sucked in from the air intake of the muffler, passes through the inner cavity of the muffler, and is discharged from the air outlet of the muffler, and then flows into the compressor cylinder.

[0003] like Figure 3 As shown, the existing silencer includes a shell and a middle partition, the shell has an inner cavity, the middle partition is located in the inner cavity, the middle partition divides the inner cavity into an upper cavity and a lower cavity, the shell is provided with an air intake and an air outlet, the air intake is connected to the lower cavity, the air outlet is connected to the upper cavity, the middle partition is provided with an air guide hole that passes through the upper cavity and the lower cavity, and also includes a serpentine pipe, the air guide hole is connected to the air intake through the serpentine pipe, the setting of the serpentine pipe extends the transmission path from the air intake to the air outlet, because the serpentine pipe has many bends and turns inside, the sound waves are reflected in the serpentine pipe, so that the sound waves of different frequencies cancel each other out, thereby achieving silence. However, the serpentine pipe cannot avoid the phenomenon of gas backflow. Under the influence of gas pressure fluctuations, the gas is easy to backflow in the serpentine pipe. The backflowing gas and the gas entering the air intake collide with each other in the serpentine pipe to generate vortex, and at the same time, it also hinders the gas from the air intake into the cylinder, which undoubtedly causes gas pressure loss and affects the suction efficiency. Utility Model Content

[0004] In order to solve the technical problem that gas backflow is easily generated in the serpentine pipe of the existing silencer device, causing pressure loss and thus affecting the suction efficiency, the utility model provides a silencer with improved suction efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The silencer includes a shell and a middle partition. The shell has an inner cavity. The middle partition is located in the inner cavity. The middle partition divides the inner cavity into an upper cavity and a lower cavity. An air intake and an air outlet are provided on the shell. The air intake is connected to the lower cavity, and the air outlet is connected to the upper cavity. An air guide hole passing through the upper cavity and the lower cavity is opened on the middle partition. It also includes a silencer. The air guide hole and the air intake are connected through the silencer. The silencer includes at least one branch channel. The silencer has a main channel. Both ends of the branch channel are connected to the main channel. The outlet pointing directions of both ends of the branch channel are orthogonally decomposed. Both ends of the branch channel have a branch direction pointing to the forward flow direction of the gas. The branch channel is used to guide the reverse flow of the gas to the forward flow.

[0007] Furthermore, a diverter is provided in the main channel, which divides the main channel into multiple secondary channels. The multiple secondary channels are distributed circumferentially along the diverter, a single branch channel corresponds to a single secondary channel, and both ends of a single branch channel are connected to the single secondary channel.

[0008] Furthermore, the silencer includes a first branch channel and a second branch channel, the first branch channel is located on the left side of the main channel, and the second branch channel is located on the right side of the main channel. The first branch channel and the second branch channel are symmetrically arranged relative to the vertical line. A diverter is provided in the main channel, which divides the main channel into a first channel on the left and a second channel on the right. Both ends of the first branch channel are connected to the first channel, and both ends of the second branch channel are connected to the second channel.

[0009] Furthermore, the cross-sectional areas of the first flow channel, the second flow channel, the first branch flow channel, and the second branch flow channel are all greater than or equal to 50 square millimeters.

[0010] Furthermore, along the forward flow direction of the gas, the first branch channel has a first end and a second end in sequence, and the angle between the forward flow direction of the central axis of the first end of the first branch channel and the forward flow direction of the central axis of the first channel is in the range of 100°-170°. Along the forward flow direction of the gas, the second branch channel has a first end and a second end in sequence, and the angle between the forward flow direction of the central axis of the first end of the second branch channel and the forward flow direction of the central axis of the second channel is in the range of 100°-170°.

[0011] Furthermore, the angle between the reverse flow direction of the central axis of the second end of the first branch channel and the reverse flow direction of the central axis of the first channel is in the range of 45°-60°, and the angle between the reverse flow direction of the central axis of the second end of the second branch channel and the reverse flow direction of the central axis of the second channel is in the range of 45°-60°.

[0012] Furthermore, along the forward flow direction of the gas, the branch channel has a first end and a second end in sequence, and an extension line of the inner wall of the branch channel at the first end completely falls on the diverter.

[0013] The beneficial effects of the utility model are:

[0014] 1. By adding at least one branch channel to the silencer, this design can effectively guide the reverse flow of gas to redirect it to forward flow, flow into the main channel, and collide with the return gas in the main channel to prevent gas backflow, avoid pressure loss, affect the suction efficiency, and ensure the stability of the compressor operation.

[0015] 2. Set up multiple branch channels and secondary channels distributed along the circumference of the diverter to form multiple backflow blocking units, further enhance the ability to guide the reverse flow of gas to redirect it to the forward flow, and prevent gas backflow.

[0016] 3. The first branch channel and the second branch channel are arranged symmetrically relative to the vertical line to form two backflow blocking units. This symmetrical design not only increases the stability of the structure and the consistency of manufacturing, but also helps to evenly distribute the airflow, further improving the sound insulation performance.

[0017] 4. The cross-sectional area of ​​the flow channel is greater than or equal to 50 square millimeters. This size ensures smooth gas flow and maintains low pressure loss. At the same time, it is conducive to the propagation and attenuation of sound waves and improves the sound insulation effect.

[0018] 5. The angle between the forward flow direction of the central axis of the first end of the first branch channel and the forward flow direction of the central axis of the first channel is 100°-170°, and the angle between the forward flow direction of the central axis of the first end of the second branch channel and the forward flow direction of the central axis of the second channel is 100°-170°. This design ensures that when the gas flows in the reverse direction, it can be effectively guided back to the forward flow direction, thereby enhancing the silencing and flow guidance effects of the entire system.

[0019] 6. The angle between the reverse flow direction of the central axis of the second end of the first branch channel and the reverse flow direction of the central axis of the first channel is in the range of 45°-60°, and the angle between the reverse flow direction of the central axis of the second end of the second branch channel and the reverse flow direction of the central axis of the second channel is in the range of 45°-60°. The reflux gas can be reasonably distributed, with one part entering the first branch channel and the first channel, and the other part entering the second branch channel and the second channel, so that the reflux gas in the first branch channel enters the first channel, which can effectively block the reflux gas in the first channel. Similarly, the reflux gas in the second branch channel enters the second channel, which can effectively block the reflux gas in the second channel. The design of this angle range can effectively block the backflow of gas.

[0020] 7. To reduce gas collisions and maintain flow channel independence, the extension line of the inner wall of the first end of the branch channel completely falls on the diverter. This allows the gas flowing back from the first branch channel to directly return to the first channel and flow in the forward direction, and the gas flowing back from the second branch channel to directly return to the second channel and flow in the forward direction. This helps maintain the relative independence of the first and second branch channels, avoids collisions between the gases flowing in opposite directions in the first and second channels, thereby reducing the formation of unnecessary vortices and improving the smoothness of gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the explosion structure of the silencer of the utility model;

[0022] Figure 2 This is a full cross-sectional view of the silencer of the present utility model;

[0023] Figure 3 It is a schematic diagram of the explosion structure of a muffler in the prior art;

[0024] Figure 4 This is a schematic structural diagram of the forward flow of air inside the silencer of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the reverse flow of air inside the silencer of the present invention;

[0026] Figure 6 This is a schematic structural diagram of the extension lines of the first branch flow channel and the second branch flow channel of the present invention;

[0027] Marked in the figure are, 1-shell, 2-middle partition, 3-air inlet, 4-air outlet, 5-air guide hole, 6-silencer, 7-main channel, 8-diverter, 9-first branch channel, 10-second branch channel, 11-first channel, 12-second channel, 13-serpentine pipe. DETAILED DESCRIPTION

[0028] 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 with reference to the accompanying drawings.

[0029] 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 utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0030] In the description of the present invention, it should be understood 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, and 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.

[0031] It should be noted that, in this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Reference Figures 1 to 6 , the utility model provides a muffler.

[0033] Reference Figure 1 and Figure 2 In an embodiment of the present scheme, a silencer is provided, including a shell 1 and a middle partition 2, the shell 1 has an inner cavity, the middle partition 2 is located in the inner cavity, the middle partition 2 divides the inner cavity into an upper cavity and a lower cavity, an air intake 3 and an air outlet 4 are provided on the shell 1, the air intake 3 is connected to the lower cavity, the air outlet 4 is connected to the upper cavity, an air guide hole 5 passing through the upper cavity and the lower cavity is opened on the middle partition 2, and a silencer 6 is also included, the air guide hole 5 is connected to the air intake 3 through the silencer 6, the silencer 6 includes at least one branch channel, the silencer 6 has a main channel 7, both ends of the branch channel are connected to the main channel 7, the outlet pointing directions of both ends of the branch channel are orthogonally decomposed, and both ends of the branch channel have a branch direction pointing to the forward flow direction of the gas, and the branch channel is used to guide the reverse flow of the gas to the forward flow.

[0034] Reference Figure 4 and Figure 5The working principle of the branch channel design is borrowed from the Tesla valve. The branch channel design constitutes a one-way guide part. When the gas enters the silencer 6 from the air inlet 3, this is a forward flow. When the gas reaches the bottom of the one-way guide part, it is divided into four air flows, from left to right in the first branch channel 9, the first channel 11, the second channel 12 and the second branch channel 10. After completely passing through the four channels, the four air flows converge and are transported to the air guide hole 5; and when the silencer is affected by the gas pressure fluctuation and generates backflow, this is a reverse flow. The gas is divided into two parts at the top of the one-way guide part. There are four air flows, from left to right, in the first branch channel 9, the first channel 11, the second channel 12, and the second branch channel 10. The first branch channel 9 flows back to the first channel 11, and the airflows of the first branch channel 9 and the first channel 11 collide with each other, thereby hindering the backflow of gas in the first channel 11. The second branch channel 10 flows back to the second channel 12, and the airflows of the second branch channel 10 and the second channel 12 collide with each other, thereby hindering the backflow of gas in the second channel 12. This can achieve the purpose of hindering the backflow of gas in the one-way conduction portion and achieving one-way conduction of gas. Preferably, multiple one-way conduction portions are arranged and distributed at intervals in the vertical direction to further increase the blocking effect on the backflow gas, and the one-way conduction effect is better.

[0035] Reference Figure 3 The silencer 6 of the prior art adopts a serpentine pipe 13, which cannot prevent the backflow of gas. Under the action of gas pressure fluctuation, the gas is easy to flow back in the serpentine pipe 13. The reflux gas and the gas entering the air intake port 3 collide with each other in the serpentine pipe 13 to generate vortex, and at the same time, it also prevents the gas from the air intake port 3 from entering the cylinder, which undoubtedly causes gas pressure loss and affects the suction efficiency.

[0036] In the embodiment of this solution, a flow divider 8 is provided within the main channel 7. The flow divider 8 divides the main channel 7 into multiple secondary channels. The multiple secondary channels are distributed circumferentially along the flow divider 8. Each branch channel corresponds to a single secondary channel, and both ends of a single branch channel are connected to the single secondary channel. The multiple branch channels and secondary channels distributed circumferentially along the flow divider 8 form multiple backflow blocking units, further enhancing the ability to redirect reverse-flowing gas to forward flow, thereby preventing gas backflow.

[0037] Reference Figure 2In the embodiment of the present scheme, the silencer 6 includes a first branch channel 9 and a second branch channel 10. The first branch channel 9 is located on the left side of the main channel 7, and the second branch channel 10 is located on the right side of the main channel 7. The first branch channel 9 and the second branch channel 10 are symmetrically arranged relative to the vertical line. A diverter 8 is provided in the main channel 7. The diverter 8 divides the main channel 7 into a first channel 11 on the left and a second channel 12 on the right. Both ends of the first branch channel 9 are connected to the first channel 11, and both ends of the second branch channel 10 are connected to the second channel 12. The first branch channel 9 and the second branch channel 10 are symmetrically arranged relative to the vertical line to form two backflow blocking units. This symmetrical design not only increases the stability of the structure and the consistency of manufacturing, but also helps to evenly distribute the airflow, further improving the silencer performance.

[0038] In an embodiment of the present scheme, along the forward flow direction of the gas, the first branch channel 9 has a first end and a second end in sequence, and the angle between the forward flow direction of the central axis of the first end of the first branch channel 9 and the forward flow direction of the central axis of the first channel 11 is in the range of 100°-170°. Along the forward flow direction of the gas, the second branch channel 10 has a first end and a second end in sequence, and the angle between the forward flow direction of the central axis of the first end of the second branch channel 10 and the forward flow direction of the central axis of the second channel 12 is in the range of 100°-170°.

[0039] In an embodiment of the present scheme, the angle between the reverse flow direction of the central axis of the second end of the first branch channel 9 and the reverse flow direction of the central axis of the first channel 11 is in the range of 45°-60°, and the angle between the reverse flow direction of the central axis of the second end of the second branch channel 10 and the reverse flow direction of the central axis of the second channel 12 is in the range of 45°-60°.

[0040] The intersection of the second end of the first branch channel 9 and the first channel 11 is the first intersection. Part of the counter-flow gas enters the first branch channel 9, and the other part enters the first channel 11. The angle range of the diversion angle at the first intersection is 45°-60°. The intersection of the second end of the second branch channel 10 and the second channel 12 is the second intersection. Part of the counter-flow gas enters the second branch channel 10, and the other part enters the second channel 12. The angle range of the diversion angle at the second intersection is 45°-60°. Through experimental verification, it is found that the design of a diversion angle of 45°-60° can reasonably distribute the reflux gas, with one part entering the first branch channel 9 and the second branch channel 10, and the other part entering the first channel 11 and the second channel 12, so that the reflux gas in the first branch channel 9 enters the first channel 11, which can effectively block the reflux gas in the first channel 11. Similarly, the reflux gas in the second branch channel 10 enters the second channel 12, which can effectively block the reflux gas in the second channel 12. The diversion angle in this angle range can effectively block the backflow of gas.

[0041] The intersection of the first end of the first branch channel 9 and the first channel 11 is the third intersection. Part of the forward-flowing gas enters the first branch channel 9, and the other part enters the first channel 11. The angle range of the diversion angle at the third intersection is 100°-170°. The intersection of the first end of the second branch channel 10 and the second channel 12 is the fourth intersection. Part of the forward-flowing gas enters the second branch channel 10, and the other part enters the second channel 12. The angle range of the diversion angle at the fourth intersection is 100°-170°. The angle range of the diversion angle at the third intersection and the fourth intersection is 100°-170°. This design ensures that when the gas flows in the reverse direction, it can be effectively guided back to the forward flow direction, thereby enhancing the silencing and diversion effects of the entire system.

[0042] In the embodiment of this solution, the cross-sectional areas of the first flow channel 11, the second flow channel 12, the first branch flow channel 9, and the second branch flow channel 10 are all greater than or equal to 50 square millimeters. The cross-sectional area of ​​the flow channels is selected to be greater than or equal to 50 square millimeters. The specific implementation should be based on the size of the compressor. There is no particular upper limit here, as long as the flow channels can ensure smooth flow and do not affect the suction efficiency.

[0043] Reference Figure 6In an embodiment of the present scheme, along the forward flow direction of the gas, the branch channel has a first end and a second end in sequence, and the extension line of the inner wall of the first end of the branch channel falls completely on the diverter 8. Such a design can reduce gas collisions and maintain the independence between the branch channels. Taking the first branch channel 9 and the second branch channel 10 as an example, the gas flowing back from the first branch channel 9 directly returns to the first channel 11 and flows in the forward direction, and the gas flowing back from the second branch channel 10 directly returns to the second channel 12 and flows in the forward direction, avoiding collisions between the gases flowing in the opposite directions of the first branch channel 9 and the second branch channel 10, thereby reducing the formation of unnecessary vortices and improving the smoothness of gas flow.

Claims

1. A muffler, comprising a shell (1) and a middle partition (2), wherein the shell (1) has an inner cavity, the middle partition (2) is located in the inner cavity, and the middle partition (2) divides the inner cavity into an upper cavity and a lower cavity. The shell (1) is provided with an air intake (3) and an air outlet (4), wherein the air intake (3) is connected to the lower cavity, and the air outlet (4) is connected to the upper cavity. The middle partition (2) is provided with an air guide hole (5) passing through the upper cavity and the lower cavity, and further comprising a muffler (6), wherein the air guide hole (5) is connected to the air intake (3) through the muffler (6), and wherein the muffler is characterized in that: The silencer (6) includes at least one branch channel, and the silencer (6) has a main channel (7). Both ends of the branch channel are connected to the main channel (7). The outlet pointing directions of the two ends of the branch channel are orthogonally decomposed, and both ends of the branch channel have a sub-direction pointing to the forward flow direction of the gas.

2. The muffler according to claim 1, wherein: A flow divider (8) is provided in the main flow channel (7), and the flow divider (8) divides the main flow channel (7) into a plurality of secondary flow channels. The plurality of secondary flow channels are distributed circumferentially along the flow divider (8), a single branch flow channel corresponds to a single secondary flow channel, and both ends of a single branch flow channel are connected to the single secondary flow channel.

3. The muffler according to claim 1, wherein: The silencer (6) comprises a first branch flow channel (9) and a second branch flow channel (10), wherein the first branch flow channel (9) is located on the left side of the main flow channel (7), and the second branch flow channel (10) is located on the right side of the main flow channel (7), and the first branch flow channel (9) and the second branch flow channel (10) are arranged symmetrically relative to a vertical line. A diverter (8) is provided in the main flow channel (7), and the diverter (8) divides the main flow channel (7) into a first flow channel (11) on the left side and a second flow channel (12) on the right side. Both ends of the first branch flow channel (9) are connected to the first flow channel (11), and both ends of the second branch flow channel (10) are connected to the second flow channel (12).

4. The muffler according to claim 3, wherein: The cross-sectional areas of the first flow channel (11), the second flow channel (12), the first branch flow channel (9), and the second branch flow channel (10) are all greater than or equal to 50 square millimeters.

5. The muffler according to claim 3, wherein: Along the forward flow direction of the gas, the first branch channel (9) sequentially has a first end and a second end, and the angle between the forward flow direction of the central axis of the first end of the first branch channel (9) and the forward flow direction of the central axis of the first channel (11) is in the range of 100°-170°. Along the forward flow direction of the gas, the second branch channel (10) sequentially has a first end and a second end, and the angle between the forward flow direction of the central axis of the first end of the second branch channel (10) and the forward flow direction of the central axis of the second channel (12) is in the range of 100°-170°.

6. The muffler according to claim 5, wherein: The angle between the reverse flow direction of the central axis of the second end of the first branch channel (9) and the reverse flow direction of the central axis of the first channel (11) is in the range of 45°-60°, and the angle between the reverse flow direction of the central axis of the second end of the second branch channel (10) and the reverse flow direction of the central axis of the second channel (12) is in the range of 45°-60°.

7. The muffler according to any one of claims 2 to 6, characterized in that: Along the forward flow direction of the gas, the branch channel has a first end and a second end in sequence, and an extension line of the inner wall of the branch channel at the first end completely falls on the diverter (8).

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