Pumping structure for reducing noise of compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a pumping structure for reducing compressor noise, which comprises an upper support, a cylinder body and a lower support, the lower end of the upper support is connected with the upper end of the cylinder body, the lower end of the cylinder body is connected with the upper end of the lower support, the upper end of the upper support is covered with a first silencing cover, and the upper end of the lower support is covered with a second silencing cover. A first closed cavity is formed between the upper support and the first silencing cover, a first exhaust channel is arranged between the upper support and the cylinder body, a first exhaust hole used for exhausting gas is formed in the first silencing cover, the gas inlet end of the first exhaust channel is communicated with the first closed cavity, and the gas outlet end of the first exhaust channel is communicated with the second closed cavity. The air outlet end of the first exhaust channel is communicated with the first exhaust hole; the utility model has the technical effects that the noise and the total vibration value of the compressor are effectively reduced, and meanwhile, the energy efficiency of the compressor is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field, concretely relates to a pump structure of reducing compressor noise. BACKGROUND

[0002] With the significant improvement of living standards, people's pursuit of life quality is increasingly strong, and air conditioner logically becomes the household product with very high popularization degree. When people purchase air conditioner, not only will they pay special attention to its energy efficiency ratio, but also noise problem gradually attracts more people's attention.

[0003] Compressor plays a key role like heart in air conditioner, however, it is also one of main sources of noise of air conditioner. When compressor is running, vibration and friction caused by complex mechanical movement inside will produce disturbing noise. For example, valve piece will produce valve piece beating sound in the opening and closing process of upper support, and the beating sound is one of main noise sources of compressor, and the existing noise reduction mode is to increase one noise cover at upper support and lower support to reduce noise, but the noise reduction effect is limited. SUMMARY

[0004] In order to solve the insufficient of prior art, the utility model provides a pump structure of reducing compressor noise, realizes the purpose of effectively reducing compressor noise and vibration total value, and does not affect the energy efficiency of compressor.

[0005] The technical purpose reached by the utility model is realized through the following technical scheme:

[0006] The utility model provides a pump structure of reducing compressor noise, including upper support, cylinder and lower support, the lower end of upper support is connected with the upper end of cylinder, and the lower end of cylinder is connected with the upper end of lower support.

[0007] The upper end of upper support is covered with first noise cover, and the upper support and first noise cover form closed cavity one.

[0008] First exhaust passage is arranged between upper support and cylinder, first exhaust hole for exhausting gas is formed in first noise cover, the gas inlet end of first exhaust passage is communicated with closed cavity one, and the gas outlet end of first exhaust passage is communicated with first exhaust hole.

[0009] In some implementation modes, the first exhaust passage includes first through hole and second through hole formed in upper support and first exhaust flow path formed in cylinder.

[0010] The two ends of the first exhaust flow path are respectively connected to the first through hole and the second through hole, the first through hole is connected to the closed cavity one, and the second through hole is connected to the first exhaust hole. The first exhaust flow path has the function of a resonance cavity, which can eliminate the noise in the corresponding frequency band and effectively reduce the total noise value.

[0011] In some implementations, the first exhaust flow path is curved, which effectively increases the space and path generated during the entire noise transmission process, increases noise transmission loss, and reduces noise transmission.

[0012] In some implementations, the first exhaust flow path includes a first exhaust portion, a second exhaust portion, and a third exhaust portion that are sequentially connected;

[0013] The first exhaust portion is connected to the first through hole, and the third exhaust portion is connected to the second through hole. The first exhaust flow path formed by multiple exhaust portions can increase the space and path generated in the entire noise transmission process, increase the noise transmission loss and reduce noise transmission.

[0014] In some implementations, a second sound-absorbing cover is provided at the upper end of the first sound-absorbing cover;

[0015] The first exhaust hole cover is arranged in the second silencer cover, and the effect of further reducing noise is achieved by adopting a double-layer silencer cover at the upper end of the upper support.

[0016] In some implementations, a second exhaust hole for gas exhaust is provided on the second silencer cover, so that the noise-reduced gas is discharged from the second exhaust hole.

[0017] In some implementations, a third sound-absorbing cover is provided on the lower end cover of the lower support, and a second closed cavity is formed between the lower support and the third sound-absorbing cover;

[0018] A second exhaust channel is formed between the upper support, the cylinder body and the lower support. The air inlet end of the second exhaust channel is connected to the closed cavity one, and the air outlet end of the second exhaust channel is connected to the closed cavity two. The addition of the second exhaust channel further increases the space and path generated in the entire noise transmission process, increases the noise transmission loss and reduces noise transmission.

[0019] In some implementations, the second exhaust passage includes a third through hole formed in the upper support, a second exhaust flow path formed in the cylinder block, and a fourth through hole formed in the lower support;

[0020] The second exhaust flow path is connected to the third through hole and the fourth through hole, the third through hole is connected to the closed cavity one, and the fourth through hole is connected to the closed cavity two. The second exhaust flow path has the function of a resonance cavity, which can eliminate the noise in the corresponding frequency band and effectively reduce the total noise value.

[0021] In some implementations, the second exhaust flow path is curved, which effectively increases the space and path generated during the entire noise transmission process, increases noise transmission loss, and reduces noise transmission.

[0022] In some implementations, the second exhaust flow path includes a fourth exhaust portion, a fifth exhaust portion, and a sixth exhaust portion that are sequentially connected;

[0023] The fourth exhaust portion is connected to the third through hole and the fourth through hole. The second exhaust flow path composed of multiple exhaust portions can increase the space and path generated in the entire noise transmission process, increase the noise transmission loss and reduce noise transmission.

[0024] In summary, the present invention has at least the following advantages:

[0025] The utility model provides a pump structure for reducing compressor noise. A first exhaust channel is arranged between the upper support and the cylinder body, so that the air inlet end of the first exhaust channel is connected to a closed cavity, and the air outlet end of the first exhaust channel is connected to a first exhaust hole, thereby increasing the space and path generated in the entire noise transmission process, increasing the noise transmission loss, reducing noise transmission, and improving the slapping sound generated by the valve plate during the pump exhaust process, thereby improving the ear feeling, effectively reducing the total noise and vibration of the compressor, and at the same time not affecting the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a pump structure provided in Example 1 of the present utility model;

[0027] Figure 2 A cross-sectional view of the pump structure provided in Example 1 of the present utility model;

[0028] Figure 3 A schematic structural diagram of a first soundproofing cover provided in Example 1 of the present utility model;

[0029] Figure 4 A schematic structural diagram of the upper support provided in Example 1 of the present utility model;

[0030] Figure 5 A schematic structural diagram of a cylinder provided in Example 1 of the present utility model;

[0031] Figure 6 A schematic diagram of the exhaust path of the first exhaust channel provided in Example 1 of the present utility model;

[0032] Figure 7 A schematic diagram of a pump structure provided in Example 2 of the present utility model;

[0033] Figure 8 An exploded view of the pump structure provided in Example 2 of the present utility model;

[0034] Figure 9 A schematic diagram of a pump structure provided in Example 3 of the present utility model;

[0035] Figure 10 A cross-sectional view of the pump structure provided in Example 3 of the present utility model;

[0036] Figure 11 A schematic structural diagram of the upper support provided in Example 3 of the present utility model;

[0037] Figure 12 A schematic structural diagram of a cylinder provided in Example 3 of the present utility model;

[0038] Figure 13 A schematic diagram of the exhaust path of the second exhaust channel provided in Example 3 of the present utility model;

[0039] 100. Upper support;

[0040] 200, cylinder body;

[0041] 300, lower support;

[0042] 400, first muffler cover; 410, first exhaust hole;

[0043] 500, closed cavity one;

[0044] 600, first exhaust channel; 610, first through hole; 620, second through hole; 630, first exhaust flow path; 631, first exhaust portion; 632, second exhaust portion; 633, third exhaust portion;

[0045] 700, second muffler cover; 710, second exhaust hole;

[0046] 800, third muffler cover; 810, second closed cavity;

[0047] 900, second exhaust channel; 910, third through hole; 920, second exhaust flow path; 921, fourth exhaust portion; 922, fifth exhaust portion; 923, sixth exhaust portion; 930, fourth through hole. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, but not all the embodiments.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0050] Embodiment 1

[0051] Please refer to Figures 1-6 A pump structure for reducing noise of a compressor, comprising an upper support 100, a cylinder body 200 and a lower support 300, the lower end of the upper support 100 is connected to the upper end of the cylinder body 200, and the lower end of the cylinder body 200 is connected to the upper end of the lower support 300, that is, the cylinder body 200 is located between the upper support 100 and the lower support 300, and the upper support 100 and the lower support 300 are used to fix and support the cylinder body 200.

[0052] The upper end of the upper support 100 is covered with a first soundproof cover 400, the first soundproof cover 400 can be quickly positioned and locked with the upper support 100 in a screw and positioning hole manner, a closed cavity one 500 is formed between the upper support 100 and the first soundproof cover 400, that is, the upper end of the upper support 100 and the inside of the first soundproof cover 400 form the closed cavity one 500.

[0053] It can be understood in combination with the working principle of the traditional pump structure that a compression cavity is formed in the cylinder body 200, and an exhaust port penetrating the body of the upper support 100 is formed on the upper support 100. When the compressor is running, the gas in the compression cavity is discharged through the exhaust port of the upper support 100, and the gas discharged from the exhaust port will hit the valve plate, thereby producing a knocking sound. The first soundproof cover 400 is provided on the upper end of the upper support 100, which can play a certain soundproofing role on the knocking sound.

[0054] Please refer to Figure 2 and Figure 3 A first exhaust passage 600 is provided between the upper support 100 and the cylinder body 200, a first exhaust hole 410 for discharging gas is formed on the first soundproof cover 400, the gas inlet end of the first exhaust passage 600 is communicated with the closed cavity one 500, and the gas outlet end of the first exhaust passage 600 is communicated with the first exhaust hole 410.

[0055] It can be seen that a closed cavity 500 is formed between the upper support 100 and the first silencer 400, that is, after the gas discharged through the exhaust port of the upper support 100 enters the closed cavity 500, it will be subjected to the silencing and refraction effects of the closed cavity 500. Since the air inlet end of the first exhaust channel 600 is connected to the closed cavity 500, the gas in the closed cavity 500 will enter the air inlet end of the first exhaust channel 600, and after being transmitted in the first exhaust channel 600, it will be discharged from the air outlet end of the first exhaust channel 600. Here, since the air outlet end of the first exhaust channel 600 is connected to the first exhaust hole 410, the gas will eventually be discharged from the first exhaust hole 410.

[0056] Specifically, the first silencer cover 400 includes a first panel and a first cover body protruding upward from the middle of the first panel. The first panel is sealed and connected to the upper support 100. A closed cavity 500 is formed between the first cover body and the upper support 100. The exhaust mask is arranged in the first cover body, and the first exhaust hole 410 is formed at the first panel of the first silencer cover 400, that is, the first exhaust hole 410 is not directly connected to the closed cavity 500.

[0057] When the compressor is running, the gas in the compression chamber inside the cylinder 200 enters the closed cavity 500 through the exhaust port of the upper support 100, and after the silencing and refraction effect of the closed cavity 500, enters the first exhaust channel 600 through the air inlet end of the first exhaust channel 600. The space and path generated in the entire noise transmission process are increased through the first exhaust channel 600, thereby increasing the noise transmission loss and reducing the noise transmission. Finally, the gas is discharged from the air outlet end of the first exhaust channel 600 to the first exhaust hole 410 and discharged to the outside through the first exhaust hole 410.

[0058] See also Figure 4 and Figure 5 In some embodiments, the first exhaust channel 600 includes a first through hole 610 and a second through hole 620 formed in the upper support 100, and a first exhaust flow path 630 formed in the cylinder body 200. As is known, the lower end of the upper support 100 is connected to the upper end of the cylinder body 200. Therefore, it is equivalent to the upper support 100 being located at the upper end of the cylinder body 200, and the first through hole 610 and the second through hole 620 are both located above the first exhaust flow path 630.

[0059] The two ends of the first exhaust flow path 630 are respectively connected to the first through hole 610 and the second through hole 620. The first through hole 610 is connected to the closed cavity 500, and the second through hole 620 is connected to the first exhaust hole 410. The first exhaust flow path 630 acts as a resonance cavity, which can eliminate noise in the corresponding frequency band and effectively reduce the total noise value.

[0060] It can be understood that, since the first through hole 610 and the second through hole 620 are both located above the first exhaust flow path 630, and the flow direction of the gas is from the first through hole 610 into the first exhaust flow path 630 and then discharged from the second through hole 620, therefore, in the entire transmission process, the gas will first be transmitted downward through the first through hole 610 and finally transmitted upward through the second through hole 620, which is a non-linear path transmission mode, and compared with the linear path transmission mode, the space and path generated in the entire noise transmission process are increased, the noise transmission loss is increased, the noise transmission is reduced, the clapping sound generated by the valve plate during the pump exhaust process is improved, thereby improving the ear feeling, effectively reducing the total value of the compressor noise and vibration, and at the same time, the energy efficiency of the compressor is not affected.

[0061] Further, the first exhaust flow path 630 is in a curved shape, such as a U-shaped curve, a V-shaped curve or a wave-shaped curve, etc., compared with a straight line path, the space and path generated in the entire noise transmission process are effectively increased, the noise transmission loss is increased and the noise transmission is reduced.

[0062] Referring to Figure 2 and Figure 6 Further, the first exhaust flow path 630 includes a first exhaust portion 631, a second exhaust portion 632 and a third exhaust portion 633 connected in sequence; the first exhaust portion 631 communicates with the first through hole 610, the third exhaust portion 633 communicates with the second through hole 620, and the first exhaust flow path 630 composed of multiple exhaust portions can increase the space and path generated in the entire noise transmission process, increase the noise transmission loss and reduce the noise transmission.

[0063] From the foregoing, it can be seen that when the gas is transmitted in the first exhaust flow path 630, it will first be transmitted downward and then upward, so in one example, the first exhaust portion 631 and the third exhaust portion 633 can be set as vertical segments, and the second exhaust portion 632 can be set as a horizontal segment, when transmitting, the gas is first transmitted downward through the first exhaust portion 631, after horizontal transmission through the second exhaust portion 632, it is turned to the third exhaust portion 633 for upward transmission, and finally discharged from the second through hole 620 of the upper support 100.

[0064] It should be noted that the number and distribution position of the first exhaust passage 600 are not specifically limited, and the transmission path of the first exhaust flow path 630 is not specifically limited, which can be adjusted according to actual needs.

[0065] This embodiment provides a pump structure for reducing compressor noise. By setting a first exhaust channel 600 between the upper support 100 and the cylinder body 200, the air inlet end of the first exhaust channel 600 is connected to the closed cavity 500, and the air outlet end of the first exhaust channel 600 is connected to the first exhaust hole 410, thereby increasing the space and path generated in the entire noise transmission process, increasing the noise transmission loss, reducing noise transmission, and improving the slapping sound generated by the valve plate during the pump exhaust process, thereby improving the ear feeling, effectively reducing the total noise and vibration value of the compressor, and at the same time not affecting the energy efficiency of the compressor.

[0066] Example 2:

[0067] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the pump structure of the utility model. Figure 7 and Figure 8 .

[0068] In this embodiment, a second silencer cover 700 is provided on the upper end of the first silencer cover 400; the first exhaust hole 410 is covered in the second silencer cover 700. By adopting a double-layer silencer cover on the upper end of the upper support 100, the effect of further reducing noise is achieved.

[0069] When the compressor is running, the gas in the compression chamber inside the cylinder 200 enters the closed cavity 500 through the exhaust port of the upper support 100, and after the silencing and refraction effect of the closed cavity 500, enters the first exhaust channel 600 through the air inlet end of the first exhaust channel 600, and increases the space and path generated in the entire noise transmission process through the first exhaust channel 600, thereby increasing the noise transmission loss and reducing the noise transmission. Finally, the gas is discharged from the air outlet end of the first exhaust channel 600 to the first exhaust hole 410, and enters the second silencer cover 700 through the first exhaust hole 410, and is silenced by the second silencer cover 700.

[0070] Furthermore, a second exhaust hole 710 for exhausting gas is provided on the second muffler cover 700 , so that the gas after noise reduction is discharged from the second exhaust hole 710 .

[0071] It should be noted that the shape, number and position distribution of the second exhaust holes 710 can be adjusted according to actual needs, and there is no specific limitation on this in this embodiment.

[0072] Example 3:

[0073] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the pump structure of the utility model. Figures 9-13 .

[0074] See also Figure 9 and Figure 10In the embodiment, the lower end of the lower support 300 is provided with a third muffling cover 800, and a closed cavity 2 810 is formed between the lower support 300 and the third muffling cover 800; a second exhaust passage 900 is formed between the upper support 100, the cylinder body 200 and the lower support 300, the intake end of the second exhaust passage 900 communicates with the closed cavity 1 500, and the exhaust end of the second exhaust passage 900 communicates with the closed cavity 2 810. By additionally providing the second exhaust passage 900, the space and path generated in the entire noise transmission process are further increased, the noise transmission loss is increased, and the noise transmission is reduced.

[0075] When the compressor is running, the gas in the compression chamber of the cylinder body 200 enters the closed cavity 1 500 through the exhaust port of the upper support 100, and after the sound attenuation and refraction of the closed cavity 1 500, part of the gas enters the first exhaust passage 600 through the intake end of the first exhaust passage 600, and part of the gas enters the second exhaust passage 900 through the intake end of the second exhaust passage 900, and then enters the closed cavity 2 810 through the exhaust end of the second exhaust passage 900. Sound attenuation and refraction are performed in the closed cavity 2 810.

[0076] Referring to Figure 10-12 In some embodiments, the second exhaust passage 900 includes a third through hole 910 formed in the upper support 100, a second exhaust flow path 920 formed in the cylinder body 200, and a fourth through hole 930 formed in the lower support 300; the second exhaust flow path 920 communicates the third through hole 910 and the fourth through hole 930, the third through hole 910 communicates the closed cavity 1 500, and the fourth through hole 930 communicates the closed cavity 2 810; the second exhaust flow path 920 has the function of a resonance cavity, which can eliminate noise of a corresponding frequency band, and effectively reduce the total value of noise.

[0077] Here, the second exhaust flow path 920 can be designed as a curved line, such as a U-shaped curve, a V-shaped curve or a wave-shaped curve, etc., effectively increasing the space and path generated in the entire noise transmission process, increasing the noise transmission loss and reducing the noise transmission.

[0078] Referring to Figure 10 and Figure 13 In some embodiments, the second exhaust flow path 920 includes a fourth exhaust portion 921, a fifth exhaust portion 922 and a sixth exhaust portion 923 which are sequentially communicated; the fourth exhaust portion 921 communicates the third through hole 910 and the fourth through hole 930; the second exhaust flow path 920 composed of multiple exhaust portions can increase the space and path generated in the entire noise transmission process, increase the noise transmission loss and reduce the noise transmission.

[0079] It is known that the second exhaust flow path 920 is communicated with the third through hole 910 and the fourth through hole 930, the third through hole 910 is communicated with the closed cavity one 500, and the fourth through hole 930 is communicated with the closed cavity two 810, and here, the second exhaust flow path 920 comprises the fourth exhaust part 921, the fifth exhaust part 922 and the sixth exhaust part 923 communicated in sequence, that is, when the gas enters into the fourth exhaust part 921 through the third through hole 910, part of the gas is exhausted into the closed cavity two 810 through the fourth through hole 930, and part of the gas is transmitted to the fifth exhaust part 922 and the sixth exhaust part 923.

[0080] It should be noted that the embodiment does not specifically limit the number and distribution position of the second exhaust passage, and does not specifically limit the transmission path of the second exhaust flow path, and can be adjusted according to actual needs.

[0081] The pump structure for reducing compressor noise provided by the utility model, through setting first exhaust passage between upper support and cylinder, make first exhaust passage's air inlet end communicate closed cavity one, first exhaust passage's air outlet end communicate first exhaust hole, increase the space and path produced in the whole noise transmission process, increase noise transmission loss, reduce noise transmission, improve the clap of valve piece produced in the pump exhaust process, thereby improve ear feeling, effectively reduce compressor noise and vibration total value, at the same time, do not affect the energy efficiency of compressor.

[0082] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0083] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

Claims

1. A pump structure for reducing compressor noise, characterized in that: It comprises an upper support (100), a cylinder (200) and a lower support (300), wherein the lower end of the upper support (100) is connected to the upper end of the cylinder (200), and the lower end of the cylinder (200) is connected to the upper end of the lower support (300); The upper end cover of the upper support (100) is provided with a first silencer cover (400), and a closed cavity (500) is formed between the upper support (100) and the first silencer cover (400); A first exhaust channel (600) is provided between the upper support (100) and the cylinder body (200), and a first exhaust hole (410) for exhausting gas is provided on the first muffler cover (400). The air inlet end of the first exhaust channel (600) is connected to the sealed cavity 1 (500), and the air outlet end of the first exhaust channel (600) is connected to the first exhaust hole (410).

2. The pump structure for reducing compressor noise according to claim 1, characterized in that: The first exhaust passage (600) includes a first through hole (610), a second through hole (620) formed in the upper support (100), and a first exhaust flow path (630) formed in the cylinder body (200); The two ends of the first exhaust flow path (630) are respectively connected to the first through hole (610) and the second through hole (620), the first through hole (610) is connected to the sealed cavity one (500), and the second through hole (620) is connected to the first exhaust hole (410).

3. The pump structure for reducing compressor noise according to claim 2, characterized in that: The first exhaust flow path (630) is curved.

4. The pump structure for reducing compressor noise according to claim 2, characterized in that: The first exhaust flow path (630) includes a first exhaust portion (631), a second exhaust portion (632), and a third exhaust portion (633) that are connected in sequence; The first exhaust portion (631) is connected to the first through hole (610), and the third exhaust portion (633) is connected to the second through hole (620).

5. The pump structure for reducing compressor noise according to any one of claims 1 to 4, characterized in that: A second sound-absorbing cover (700) is provided at the upper end of the first sound-absorbing cover (400); The first exhaust hole (410) is housed in the second silencer cover (700).

6. The pump structure for reducing compressor noise according to claim 5, characterized in that: The second muffler cover (700) is provided with a second exhaust hole (710) for exhausting gas.

7. The pump structure for reducing compressor noise according to claim 1, characterized in that: The lower end cover of the lower support (300) is provided with a third silencer cover (800), and a second closed cavity (810) is formed between the lower support (300) and the third silencer cover (800); A second exhaust channel (900) is formed between the upper support (100), the cylinder body (200) and the lower support (300), the air inlet end of the second exhaust channel (900) being connected to the sealed cavity one (500), and the air outlet end of the second exhaust channel (900) being connected to the sealed cavity two (810).

8. The pump structure for reducing compressor noise according to claim 7, characterized in that: The second exhaust passage (900) includes a third through hole (910) formed in the upper support (100), a second exhaust flow path (920) formed in the cylinder block (200), and a fourth through hole (930) formed in the lower support (300); The second exhaust flow path (920) is connected to the third through hole (910) and the fourth through hole (930), the third through hole (910) is connected to the sealed cavity one (500), and the fourth through hole (930) is connected to the sealed cavity two (810).

9. The pump structure for reducing compressor noise according to claim 8, characterized in that: The second exhaust flow path (920) is curved.

10. The pump structure for reducing compressor noise according to claim 8, characterized in that: The second exhaust flow path (920) includes a fourth exhaust portion (921), a fifth exhaust portion (922), and a sixth exhaust portion (923) that are connected in sequence; The fourth exhaust portion (921) communicates with the third through hole (910) and the fourth through hole (930).

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