Silencing cavity structure for totally-enclosed refrigeration compressor

Abstract

The silencing cavity structure comprises an upper cavity, a lower cavity and a first partition plate arranged between the upper cavity and the lower cavity, an air inlet channel is formed in the outer side face of the lower cavity, and a snakelike communicating vessel assembly connected to the first partition plate is arranged in the lower cavity. The snakelike communicating vessel assembly comprises a snakelike communicating pipe and at least one second partition plate arranged on the snakelike communicating pipe, the second partition plate divides the lower cavity into a plurality of small cavities, the wall of one small cavity is connected with an air inlet channel, one end of the snakelike communicating pipe corresponds to the air inlet channel, and the other end of the snakelike communicating pipe is connected to the first partition plate. The air passes through each small cavity; a third partition plate is arranged in the snakelike communicating pipe in the bending path direction of the snakelike communicating pipe. The snakelike communicating pipe and the third partition plate are provided with notches in the space where the remaining small cavities are located. A fourth partition plate is arranged in the air inlet channel in the air inlet direction. By adopting the scheme, the noise reduction characteristic of the target frequency band can be improved under the condition that the air suction efficiency is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration compressor equipment, specifically to a silencer cavity structure for a fully enclosed refrigeration compressor. Background Technology

[0002] Chinese utility model patent application number CN202122016128.5, published on December 13, 2022, discloses a serpentine connecting pipe silencer for a refrigerator compressor, including an upper silencer chamber and a lower silencer chamber. The lower silencer chamber includes a connector assembly, a left silencer expansion cavity, and a right silencer expansion cavity. The connector assembly includes a serpentine connecting pipe and a partition plate fixedly connected to the serpentine connecting pipe. The serpentine connecting pipe includes a U-shaped bend, a neck section, and a tail section. The U-shaped bend section has a pair of symmetrically arranged opening slits. This utility model, by setting the serpentine connecting pipe and the opening slits in combination, utilizes the Helmholtz resonance silencing principle to effectively adjust the silencing frequency range and increase the silencing volume of the target frequency band. The disadvantage of this technical solution is that when used in a large-displacement compressor, the suction pressure is too high and the strength of the communicating vessel is low, resulting in a greater impact on the communicating vessel and the silencer chamber. This leads to a less effective silencing effect compared to small and medium-displacement compressors. Furthermore, the silencing characteristics of the silencer in the low-frequency range are mainly affected by factors such as the internal volume of the silencer, the length of the gas flow pipe, and the inner diameter. To accommodate large-displacement compressors, it is necessary to appropriately increase the cross-sectional area of ​​the pipe. However, increasing the cross-sectional area of ​​the pipe will result in a worse silencing effect. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a silencer cavity structure for a fully enclosed refrigeration compressor.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A silencer structure for a fully enclosed refrigeration compressor includes an upper chamber and a lower chamber, and a first partition disposed between the upper chamber and the lower chamber. The lower chamber has an air intake channel on its outer surface, and a serpentine connector assembly connected to the first partition is disposed within the lower chamber. The serpentine connector assembly includes a serpentine connecting pipe and at least one second partition disposed on the serpentine connecting pipe. The second partition divides the lower chamber into multiple smaller chambers, one of which is connected to the air intake channel at its wall. One end of the serpentine connecting pipe is arranged corresponding to the air intake channel, and the other end is connected to the first partition, passing through each of the smaller chambers. A third partition is disposed within the serpentine connecting pipe along its curvature, and the serpentine connecting pipe and the third partition have notches in the spaces of the remaining smaller chambers. A fourth partition is disposed within the air intake channel along the air intake direction.

[0006] The chamber connected to the air intake channel is a non-resonant chamber, while the other chambers are resonant chambers. The serpentine connecting pipe and the third partition have gaps in the space where the remaining small chambers are located. The resonant chamber, the serpentine connecting pipe, and the gaps in the space where the remaining small chambers are located constitute a Helmholtz resonant chamber structure.

[0007] According to the Helmholtz principle, the noise reduction characteristics of the Helmholtz resonant cavity structure are related to the size of the cross-sectional area of ​​the notch, the wall thickness of the serpentine connecting tube, the volume of the resonant cavity, and the cross-sectional area of ​​the serpentine connecting tube.

[0008] By setting a baffle inside the serpentine connecting pipe, the connecting pipe with a larger cross-sectional area is divided into two connecting pipes with smaller cross-sectional areas. According to the principle of Helmholtz, it can be deduced that when the cross-sectional area of ​​the pipe becomes smaller, the noise reduction effect on a specific frequency band will be improved. Therefore, adopting such a structural design can further improve the noise reduction effect on the target frequency band.

[0009] Furthermore, by installing baffles inside the serpentine connecting pipe, the internal structure of the serpentine connecting pipe is strengthened, which improves its impact resistance and enables it to better adapt to large-displacement compressors.

[0010] In addition, a fourth baffle is installed in the air intake channel. After the air is diverted by the baffle, it enters the cavity, reducing the pulsation generated at the intake port, making the gas more stable, and further improving the noise reduction effect.

[0011] Furthermore, the third baffle is centrally located on the inner wall of the serpentine connecting pipe, and the fourth baffle is centrally located on the inner wall of the intake pipe.

[0012] By placing the third baffle in the middle position, the serpentine connecting pipe is divided into two connecting pipes with smaller cross-sectional areas. The resistance to gas is not significantly different, which allows for a more stable flow at the muffler outlet and further reduces exhaust noise.

[0013] Furthermore, the thickness of the third and fourth partitions is 1-2 mm respectively. This thickness can strengthen the structural strength of the serpentine connecting pipe and the air intake channel, and effectively alleviate the vibration generated by the serpentine connecting pipe and the air intake channel when transmitting gas. On the other hand, compared with the serpentine connecting pipe without partitions, the outer diameter of any cross-section of the serpentine connecting pipe will not differ much under the same air intake cross-section.

[0014] Furthermore, the end of the third partition corresponds to the beginning of the fourth partition and is arranged at intervals. Through the interval arrangement, the chamber connected to the air intake pipe is an expansion chamber. The gas flows through the air intake channel, passes through the expansion chamber, and finally flows through the serpentine connecting pipe for diversion. In this process, the sound wave is reflected at the point of abrupt change in cross-sectional area, which can effectively attenuate the noise and further improve the noise reduction effect.

[0015] Furthermore, there is an angle between the third partition and the fourth partition, the angle being 0~5°; by setting the angle, the airflow can be slowed down to a certain extent, thereby reducing the airflow velocity and pressure, allowing the airflow to enter the pipe smoothly, thus achieving the effect of noise reduction.

[0016] Furthermore, the notch includes a slit or hole provided on the serpentine connecting tube, and the third partition is disposed disconnected at the location of the notch.

[0017] According to the Helmholtz principle, the noise reduction characteristics of the Helmholtz resonant cavity structure are related to the cross-sectional area of ​​the notch, the wall thickness of the serpentine connecting tube, the volume of the resonant cavity, and the cross-sectional area of ​​the serpentine connecting tube. When these parameters are constant, the larger the cross-sectional area of ​​the notch, the better the noise reduction effect of the Helmholtz resonant cavity structure for a specific frequency band. The third partition is arranged disconnected at the notch, which can effectively increase the size of the notch, thereby ensuring the noise reduction effect of the target frequency band.

[0018] Furthermore, the air intake channel includes an open air intake port and a cylindrical channel, with the fourth baffle disposed in the cylindrical channel; after the gas is drawn in at the flared end, it is diverted by the baffle and enters the cavity, reducing the pulsation generated at the air intake port and making the gas more stable, thereby improving the noise reduction effect.

[0019] Furthermore, the end of the third partition near the fourth partition is spaced 5-10mm from the end of the serpentine connecting pipe, and the end of the third partition near the first partition does not extend beyond the first partition. With this structural design, the sound waves are reflected at the point of abrupt change in cross-sectional area within the serpentine connecting pipe, which can effectively attenuate noise and further improve the noise reduction effect.

[0020] Furthermore, both the serpentine connecting tube and the third partition are half-assembled structures; by adopting such a structural design, the parts that make up the serpentine connecting tube can be processed relatively easily.

[0021] Furthermore, the serpentine connecting pipe has a half-assembly structure, with the third partition plate fixedly connected to one half of the serpentine connecting pipe. The other half of the serpentine connecting pipe has a groove corresponding to the third partition plate, and one end of the third partition plate can be embedded in the groove. By adopting such a structural design, on the one hand, the parts that make up the serpentine connecting pipe can be processed relatively easily, and on the other hand, the flow diversion function of the partition plate at non-notch locations can be guaranteed.

[0022] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0023] 1. A third baffle is installed inside the serpentine connecting pipe to divide the connecting pipe with a larger cross-sectional area into two connecting pipes with smaller cross-sectional areas. According to the principle of Helmholtz, it can be deduced that when the cross-sectional area of ​​the pipe becomes smaller, the noise reduction effect on a specific frequency band will be improved. Therefore, adopting such a structural design can further improve the noise reduction effect on the target frequency band.

[0024] 2. By providing a third baffle on the inner wall of the serpentine connecting pipe, the structural strength of the serpentine connecting pipe is improved while ensuring the intake efficiency, making it better suited for large-displacement compressors.

[0025] 3. By setting a fourth baffle on the inner wall of the air intake channel, the gas is diverted through the baffle before entering the cavity, reducing the pulsation generated at the air intake and making the gas flow more stable, thus further improving the noise reduction effect.

[0026] 4. The end of the third partition corresponds to the beginning of the fourth partition and is arranged at intervals. Through the interval arrangement, the chamber connected to the air intake pipe is an expansion chamber. The gas flows through the air intake channel, passes through the expansion chamber, and finally flows through the serpentine connecting pipe for diversion. In this process, the sound wave is reflected at the point of abrupt change in cross-sectional area, which can effectively attenuate the noise and further improve the noise reduction effect.

[0027] 5. The air intake channel includes an open air intake port and a cylindrical channel. The fourth baffle is disposed in the cylindrical channel. After the gas is drawn in at the horn-shaped opening, it is diverted by the baffle in the air intake channel and enters the cavity, reducing the pulsation generated at the air intake port and making the gas more stable, thereby improving the noise reduction effect. Attached Figure Description

[0028] Figure 1 This is a first-view structural diagram of the overall structure of the silencing cavity for a fully enclosed refrigeration compressor according to the present invention.

[0029] Figure 2 This is a cross-sectional view of the silencing cavity structure for a fully enclosed refrigeration compressor according to the present invention;

[0030] Figure 3 This is a perspective view of the connection between the serpentine communicating vessel assembly and the first partition plate in the silencing cavity structure of a fully enclosed refrigeration compressor according to this utility model.

[0031] Figure 4 This is a three-dimensional view of a serpentine communicating vessel half-pipe assembled in half with a silencing cavity structure for a fully enclosed refrigeration compressor according to the present invention.

[0032] Figure 5 This utility model provides a three-dimensional view of the other half of a serpentine connector, which is a silencing cavity structure for a fully enclosed refrigeration compressor.

[0033] Figure 6 This is a second-view view of the overall structure of the silencing cavity for a fully enclosed refrigeration compressor according to the present invention.

[0034] In the diagram: 1. Upper chamber; 2. Lower chamber; 3. First partition; 4. Air intake passage; 5. Serpentine connecting pipe; 6. Second partition; 7. Third partition; 8. Notch; 9. Fourth partition; 10. Open air intake; 11. Columnar passage. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "horizontal", "vertical", etc., indicating the orientation or positional relationship are all based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] like Figures 1 to 6 As shown, a silencer chamber structure for a fully enclosed refrigeration compressor includes an upper chamber 1 and a lower chamber 2, and a first partition 3 disposed between the upper chamber 1 and the lower chamber 2. An exhaust channel is provided above the upper chamber, and an air intake channel 4 is provided on the outer side of the lower chamber 2. A serpentine communicating vessel assembly connected to the first partition 3 is provided inside the lower chamber 2. The serpentine communicating vessel assembly includes a serpentine communicating pipe 5 and at least one second partition 6 disposed on the serpentine communicating pipe 5. The second partition 6 divides the lower chamber 2 into multiple small chambers. The air intake channel 4 is connected to the wall of one of the small chambers. One end of the serpentine communicating pipe 5 is arranged correspondingly to the air intake channel 4, and the other end is connected to the first partition 3 and passes through each of the small chambers. A third partition 7 is provided inside the serpentine communicating pipe 5 along its bending path direction. The serpentine communicating pipe 5 and the third partition 7 have a notch 8 in the space where the remaining small chambers are located. A fourth partition 9 is provided inside the air intake channel 4 along the air intake direction.

[0038] The chamber connected to the air intake channel 4 is a non-resonant chamber, while the other chambers are resonant chambers. The serpentine connecting pipe 5 and the third partition 7 have a gap 8 in the space where the remaining small chambers are located. The resonant chamber, the serpentine connecting pipe 5, and the gap 8 in the space where the remaining small chambers are located constitute a Helmholtz resonant chamber structure.

[0039] By setting a baffle inside the serpentine connecting pipe 5, the connecting pipe with a larger cross-sectional area is divided into two connecting pipes with smaller cross-sectional areas. According to the principle of Helmholtz, it can be deduced that when the cross-sectional area of ​​the pipe becomes smaller, the noise reduction effect on a specific frequency band will be improved. Therefore, adopting such a structural design can further improve the noise reduction effect on the target frequency band.

[0040] Furthermore, by installing baffles inside the serpentine connecting pipe 5, the internal structure of the serpentine connecting pipe 5 is strengthened, and its impact resistance is improved, enabling it to better adapt to large-displacement compressors.

[0041] In addition, a fourth baffle 9 is provided in the air intake channel 4. After the air is diverted by the baffle, it enters the cavity, reducing the pulsation generated at the air intake and making the gas more stable, thereby further improving the noise reduction effect.

[0042] Furthermore, the third baffle 7 is centrally located on the inner wall of the serpentine connecting pipe, and the fourth baffle 9 is centrally located on the inner wall of the intake pipe 4.

[0043] By placing the third baffle 7 in the middle position, the serpentine connecting pipe 5 is divided into two connecting pipes with smaller cross-sectional areas by the third baffle 7. The resistance to gas is not much different, which can make the gas flow at the muffler outlet more stable and further reduce exhaust noise.

[0044] Furthermore, the thickness of the third partition 7 and the fourth partition 9 is 1~2mm respectively. Such thickness can strengthen the structural strength of the serpentine connecting pipe 5 and the air intake channel 4, and effectively alleviate the vibration generated by the serpentine connecting pipe 5 and the air intake channel 4 when transmitting gas. On the other hand, compared with the serpentine connecting pipe without partitions, the outer diameter of any cross section of the serpentine connecting pipe 5 will not differ much under the same air intake cross section.

[0045] Furthermore, the end of the third partition 7 corresponds to the beginning of the fourth partition 9 and is arranged at intervals; through the interval arrangement, the chamber connected to the air inlet pipe is an expansion chamber. The gas flows through the air inlet channel 4, passes through the expansion chamber, and finally flows through the serpentine connecting pipe 5 for diversion. In this process, the sound wave is reflected at the point of abrupt change in cross-sectional area, which can effectively attenuate the noise and further improve the noise reduction effect.

[0046] Furthermore, there is an angle between the third partition 7 and the fourth partition 9, the angle being 0~5°; by setting the angle, the airflow can be slowed down to a certain extent, thereby reducing the airflow velocity and pressure, allowing the airflow to enter the pipe smoothly, thus achieving the effect of noise reduction.

[0047] Furthermore, the notch 8 includes a slit or hole provided on the serpentine connecting pipe 5, and the third partition 7 is arranged discontinuously at the location of the notch 8;

[0048] According to the Helmholtz principle, the noise reduction characteristics of the Helmholtz resonant cavity structure are related to the cross-sectional area of ​​the notch 8, the wall thickness of the serpentine connecting pipe 5, the volume of the resonant cavity, and the cross-sectional area of ​​the serpentine connecting pipe 5. When these parameters are constant, the larger the cross-sectional area of ​​the notch 8, the better the noise reduction effect of the Helmholtz resonant cavity structure for a specific frequency band. The third partition 7 is disconnected at the notch 8, which can effectively increase the size of the notch 8, thereby ensuring the noise reduction effect of the target frequency band.

[0049] Furthermore, the air intake channel 4 includes an open air intake 10 and a cylindrical channel 11, and the fourth baffle 9 is disposed in the cylindrical channel 11; after the gas is drawn in at the horn mouth, it is diverted by the baffle and enters the cavity, reducing the pulsation generated at the air intake and making the gas more stable, thereby improving the noise reduction effect.

[0050] Furthermore, the end of the third partition 7 near the fourth partition 9 is spaced 5-10mm from the end of the serpentine connecting pipe 5, and the end of the third partition 7 near the first partition 3 does not extend beyond the first partition 3. In the area of ​​the serpentine connecting pipe 5 where no partition is set near the air inlet, the gas transmission cross-sectional area is large. In the area where a partition is set, the gas diversion transmission cross-sectional area is small. Then, when the gas flows through the position near the outlet of the serpentine connecting pipe 5 where no partition is set, the gas transmission cross-sectional area is large. The sound wave is reflected at the point of abrupt change in cross-sectional area in the serpentine connecting pipe 5, which can effectively attenuate noise and further improve the noise reduction effect.

[0051] Furthermore, both the serpentine connecting pipe 5 and the third partition 7 are half-assembled structures; by adopting such a structural design, the parts that make up the serpentine connecting pipe 5 can be processed relatively easily.

[0052] To ensure the sealing of the two serpentine connecting half-pipes, a recessed positioning step structure is provided on the end face of the general pipe, and a positioning protrusion that can be embedded in the recessed positioning step is provided on the other half-pipe. Furthermore, one of the serpentine connecting half-pipes is provided with several mounting lugs with pre-drilled pin holes, and the other serpentine connecting half-pipe is provided with mounting lugs with pins.

[0053] The two serpentine connecting half-pipes are connected by an embedded assembly of a concave positioning step and a positioning protrusion, and by a fixed connection of an interference fit between a pin hole and a pin. On the one hand, this ensures the sealing of the serpentine connecting pipe 5, and on the other hand, the interference fit connection makes the connection more secure, which can further prevent the resonance noise caused by an unstable connection.

[0054] Several sets of abutments are provided on the inner wall of the lower chamber 2 to abut against the serpentine connector. On the outer wall of the serpentine connector, away from the abutments, there are protrusions that can abut against the inner wall of the lower chamber 2. The cooperation between the abutments and the protrusions can fix all parts of the serpentine connector 5, further preventing vibration and noise during gas transmission.

[0055] Furthermore, the serpentine connecting pipe 5 has a half-assembly structure, with the third partition 7 fixedly connected to one half of the serpentine connecting pipe 5. The other half of the serpentine connecting pipe 5 is provided with a groove corresponding to the third partition 7, and one end of the third partition 7 can be embedded in the groove. By adopting such a structural design, on the one hand, the parts that make up the serpentine connecting pipe 5 can be processed relatively easily, and on the other hand, the flow diversion function of the partition at the non-notch 8 can be guaranteed.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silencer structure for a fully enclosed refrigeration compressor, comprising an upper chamber (1) and a lower chamber (2), and a first partition (3) disposed between the upper chamber (1) and the lower chamber (2), wherein an air inlet channel (4) is provided on the outer side of the lower chamber (2), and a serpentine communicating vessel assembly connected to the first partition (3) is provided inside the lower chamber (2), characterized in that, The serpentine connector assembly includes a serpentine connecting pipe (5) and at least one second partition (6) disposed on the serpentine connecting pipe (5). The second partition (6) divides the lower chamber (2) into multiple small chambers. The wall of one of the small chambers is connected to the air intake channel (4). One end of the serpentine connecting pipe (5) is arranged correspondingly to the air intake channel (4), and the other end is connected to the first partition (3) and passes through each of the small chambers. A third partition (7) is provided in the serpentine connecting pipe (5) along its bending path direction. The serpentine connecting pipe (5) and the third partition (7) have gaps (8) in the space where the remaining small chambers are located. A fourth partition (9) is provided in the air intake channel (4) along the air intake direction.

2. The silencer structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The third partition (7) is centrally located on the inner wall of the serpentine connecting pipe, and the fourth partition (9) is centrally located on the inner wall of the air intake pipe (4).

3. The silencer structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The thicknesses of the third partition (7) and the fourth partition (9) are 1~2mm respectively.

4. The silencer structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The end of the third partition (7) corresponds to the beginning of the fourth partition (9) and is arranged at intervals.

5. A silencer chamber structure for a fully enclosed refrigeration compressor according to claim 1 or 4, characterized in that, There is an angle between the third partition (7) and the fourth partition (9), and the angle is 0~5°.

6. The silencer chamber structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The notch (8) includes a slit or hole provided on the serpentine connecting pipe (5), and the third partition (7) is arranged disconnected at the location of the notch (8).

7. The silencer chamber structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The air intake channel (4) includes an open air intake (10) and a cylindrical channel (11), and the fourth partition (9) is disposed in the cylindrical channel (11).

8. The silencer structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The third partition (7) has a 5-10mm gap between the end of the third partition (7) near the fourth partition (9) and the end of the serpentine connecting pipe (5), and the end of the third partition (7) near the first partition (3) does not extend beyond the first partition (3).

9. The silencer chamber structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, Both the serpentine connecting pipe (5) and the third partition (7) are half-assembled structures.

10. The silencer structure for a fully enclosed refrigeration compressor according to claim 1, characterized in that, The serpentine connecting pipe (5) is a half-assembly structure. The third partition (7) is fixedly connected to one half of the serpentine connecting pipe (5). The other half of the serpentine connecting pipe (5) is provided with a groove corresponding to the third partition (7). One end of the third partition (7) can be embedded in the groove.

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