compressor

Abstract

This disclosure relates to a compressor, comprising: a compression body including a first housing, the first housing having an exhaust chamber and a first exhaust port, the first exhaust port being located at the tail end of the exhaust chamber; and a noise reduction component (10) for reducing noise in the gas discharged from the first exhaust port, the noise reduction component (10) including a second housing (1), the second housing (1) having an exhaust flow channel (11), an air inlet (111) and a second exhaust port (112), the air inlet (111) and the second exhaust port (112) being located at opposite ends of the exhaust flow channel (11), the end of the second housing (1) near the air inlet (111) being detachably connected to the end of the first housing near the first exhaust port, and the air inlet (111) communicating with the first exhaust port, the second exhaust port (112) being used to discharge the noise-reduced gas.

Description

Technical Field

[0001] This disclosure relates to the field of air compression technology, and more particularly to a compressor. Background Technology

[0002] During the operation of a screw compressor, the compression chamber and the intake and exhaust chambers are periodically connected, causing unstable gas flow and airflow pulsation in the intake and exhaust chambers. This aggravates the vibration and noise in the intake and exhaust chambers. Due to the problems of over-compression or under-compression of the exhaust pressure and the exhaust pressure at the end of the exhaust, the airflow pulsation in the exhaust chamber induces even more serious noise problems. Summary of the Invention

[0003] This disclosure provides a compressor that facilitates better noise reduction.

[0004] This disclosure provides a compressor, including: a compression body, comprising a first housing, the first housing having an exhaust chamber and a first exhaust port, the first exhaust port being located at the tail end of the exhaust chamber; and

[0005] A noise reduction component is used to reduce the noise of the gas discharged from the first exhaust port. The noise reduction component includes a second housing, which is provided with an exhaust flow channel, an air inlet, and a second exhaust port. The air inlet and the second exhaust port are located at opposite ends of the exhaust flow channel. The end of the second housing near the air inlet is detachably connected to the end of the first housing near the first exhaust port, and the air inlet is connected to the first exhaust port. The second exhaust port is used to discharge the noise-reduced gas.

[0006] In some embodiments, the main body of the exhaust channel extends in the same direction as the exhaust chamber.

[0007] In some embodiments, the exhaust channel extends in a straight line.

[0008] In some embodiments, an attenuation cavity is provided on the inner wall of the exhaust channel, and the attenuation cavity is in communication with the exhaust channel.

[0009] In some embodiments, multiple attenuation chambers are provided at intervals along the extension direction of the exhaust channel.

[0010] In some embodiments, the attenuation chamber is located on the left and / or right side of the exhaust channel.

[0011] In some embodiments, the inner wall of the second housing is provided with a set of attenuation chambers on the left and right sides of the exhaust channel, and each set of attenuation chambers includes a plurality of attenuation chambers spaced apart along the extension direction of the exhaust channel.

[0012] In some embodiments, the noise reduction assembly further includes a noise reduction plate installed on the inner sidewall of the second housing. The noise reduction plate has perforations, and the exhaust channel communicates with the attenuation chamber through the perforations.

[0013] In some embodiments, the noise reduction plate is provided with through holes, which correspond to the position of the attenuation chamber. The through holes are used to allow the airflow in the exhaust channel to directly enter the attenuation chamber.

[0014] In some embodiments, the noise reduction plate is detachably mounted on the second housing.

[0015] In some embodiments, the noise reduction assembly includes a plurality of noise reduction plates with different numbers and / or perforation layouts, and the noise reduction plates may be selectively installed in the second housing according to the operating conditions of the compressor.

[0016] In some embodiments, the perforation rate T on the noise reduction board is calculated using the following formula:

[0017]

[0018] Where L is the total length of the exhaust channel; D is the thickness of the noise reduction plate; r is the radius of the perforation; fr is the natural frequency of the attenuation cavity; and c0 is the sound velocity of the fluid in the exhaust channel.

[0019] In some embodiments, the second housing is further provided with an exhaust bearing housing cavity, which is located at the top of the exhaust flow channel and communicates with the exhaust flow channel. The length of the exhaust flow channel is greater than the length of the exhaust bearing housing cavity.

[0020] In some embodiments, an attenuation cavity is provided on the inner wall adjacent to the exhaust flow channel and the exhaust bearing housing cavity. The attenuation cavity is connected to the exhaust flow channel, and the inner wall of the attenuation cavity forms an inclined surface. The inclined surface gradually approaches the center position of the exhaust flow channel along the width direction from the top to the bottom.

[0021] In some embodiments, the inner wall of the second housing is provided with a blocking portion at the junction of the exhaust bearing housing and the exhaust channel, and the blocking portion is aligned with the extending direction of the exhaust channel.

[0022] In some embodiments, the compressor is a screw compressor.

[0023] In this embodiment of the compressor, the noise reduction component is installed independently outside the compressor body, not within the gas flow channel inside the compressor body. This facilitates the structural layout within the compressor body and makes installation of the noise reduction component easier. Furthermore, for different compressor models or different operating conditions of the same compressor, a more suitable noise reduction component can be selected, enabling the noise reduction component to adapt to different compressors, meet noise reduction frequency band requirements, achieve better noise reduction effects, and improve compressor performance. For different operating conditions of the same compressor, multi-band noise reduction can be achieved by selecting a matching noise reduction component. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of some embodiments of the noise reduction components in the compressor of this disclosure.

[0026] Figure 2 This is a cross-sectional view of some embodiments of the noise reduction components in the compressor of this disclosure.

[0027] Figure 3 This is a left view of some embodiments of the noise reduction component in the compressor of this disclosure.

[0028] Figure 4 This is a schematic diagram of the noise reduction plate installed in the second housing of the noise reduction assembly.

[0029] Explanation of reference numerals in the attached figures

[0030] 10. Noise reduction component; 1. Second housing; 11. Exhaust channel; 111. Air inlet; 112. Second exhaust port; 12. Exhaust bearing housing cavity; 13. Mounting flange; 131. Hole; 14. Transition connection; 2. Attenuation cavity; 3. Noise reduction plate; 31. Perforation; 32. Through hole; 4. Blocking part. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0033] In the description of this disclosure, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0034] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0035] like Figures 1 to 4 As shown, this disclosure provides a compressor, which in some embodiments includes:

[0036] The compression body includes a first housing, the first housing having an exhaust chamber and a first exhaust port, the first exhaust port being located at the tail end of the exhaust chamber; and

[0037] The noise reduction component 10 is used to reduce the noise of the gas discharged from the first exhaust port. The noise reduction component 10 includes a second housing 1. The second housing 1 is provided with an exhaust flow channel 11, an air inlet 111 and a second exhaust port 112. The air inlet 111 and the second exhaust port 112 are respectively located at both ends of the exhaust flow channel 11. The end of the second housing 1 near the air inlet 111 is detachably connected to the end of the first housing near the first exhaust port, and the air inlet 111 is connected to the first exhaust port. The second exhaust port 112 is used to discharge the noise-reduced gas.

[0038] The compression body is used to compress the gas. The exhaust chamber is located downstream of the compression chamber along the gas flow direction. The high-pressure gas compressed in the compression chamber enters the exhaust chamber and is discharged through the first exhaust port. Then, it enters the exhaust flow channel 11 of the noise reduction component 10 through the air inlet 111 to perform noise reduction treatment on the exhaust gas. Finally, it is discharged through the second exhaust port 112.

[0039] The specific dimensions of the exhaust channel 11 can be determined according to the compressor's exhaust volume. Generally, the airflow velocity is set at 10±1m / s. Based on this and the compressor's specific displacement, the cross-sectional area of ​​the exhaust channel 11 is designed.

[0040] like Figure 1 As shown, the second housing 1 has a mounting flange 13 at its end near the first housing. The mounting flange 13 has multiple holes 131 spaced circumferentially to allow the second housing 1 to be mounted to the first housing using fasteners. For example, the fasteners can be screws, bolts, etc.

[0041] In this embodiment, the noise reduction component 10 is installed independently outside the compressor body, rather than inside the gas flow channel of the compressor body. This facilitates the structural layout within the compressor body and makes the installation of the noise reduction component 10 easier. Furthermore, for different compressor models or different operating conditions of the same compressor, a more suitable noise reduction component 10 can be selected, enabling the noise reduction component 10 to adapt to different compressors, meet the noise reduction frequency band requirements, achieve better noise reduction effects, and improve the compressor's performance. For different operating conditions of the same compressor, multi-band noise reduction of the same compressor can be achieved by selecting a matching noise reduction component 10.

[0042] In addition, the noise reduction component 10 is designed as an integral structure, which takes into account the characteristics of sealing, compactness and simplified assembly, making it easy to install and suitable for mass production.

[0043] In some embodiments, the main body of the exhaust channel 11 extends in the same direction as the exhaust chamber.

[0044] This embodiment allows the gas flowing out of the exhaust chamber to enter the exhaust channel 11. It adopts a straight-through exhaust design to form axial exhaust, which reduces the detour of the airflow path, reduces exhaust pressure loss, directly reduces exhaust noise, improves noise reduction efficiency, and avoids further noise generation. At the same time, it can control the exhaust flow rate within a precise and appropriate range, improving the compressor's energy efficiency. In addition, it can also allow oil droplets to be discharged more smoothly with the airflow.

[0045] In some embodiments, such as Figure 2 As shown, the exhaust channel 11 extends in a straight line.

[0046] This embodiment forms a straight flow channel design, which reduces the detour of the airflow path and can reduce the pressure loss of the exhaust during the flow of exhaust in the exhaust channel 11. At the same time, it can control the exhaust flow rate within a precise and appropriate range, thereby improving the energy efficiency of the compressor. In addition, it can also make oil droplets more smoothly discharged with the airflow.

[0047] Furthermore, in embodiments where the main extension direction of the exhaust channel 11 is consistent with that of the exhaust chamber and the exhaust channel 11 extends in a straight line, the detour of the airflow path can be minimized, thereby reducing the pressure loss of the exhaust during its flow within the exhaust channel 11.

[0048] In some embodiments, an attenuation cavity 2 is provided on the inner sidewall of the exhaust channel 11, and the attenuation cavity 2 is connected to the exhaust channel 11. For example, the attenuation cavity 2 can be in various shapes such as rectangles, polygons, circles, ellipses, etc.

[0049] This embodiment enables the gas to enter the attenuation chamber 2 as it flows along the exhaust channel 11, absorbing airflow pulsation and thus reducing the vibration noise of the compressor during operation. The attenuation chamber 2 plays the main role in vibration reduction, and the gas eventually flows back to the exhaust channel 11 after entering the attenuation chamber 2.

[0050] In some embodiments, such as Figure 2 As shown, multiple attenuation chambers 2 are spaced apart along the extension direction of the exhaust channel 11. For example, the multiple attenuation chambers 2 can have the same shape or different dimensions. The number of attenuation chambers 2 can be determined according to the noise frequency bands that the compressor needs to attenuate, and can be flexibly increased or decreased. When there are many noise frequency bands that need noise reduction, and the noise reduction pressure is relatively high, the number of attenuation chambers 2 can be increased. Figure 2 Four attenuation cavities are set on one side.

[0051] This embodiment enables the gas to gradually pass through the sequentially arranged attenuation chambers 2 during its flow within the exhaust channel 11, thereby making full use of each attenuation chamber 2 and achieving a better vibration reduction effect.

[0052] In some embodiments, such as Figure 1 As shown, the attenuation chamber 2 is located on the left and / or right side of the exhaust channel 11. By simultaneously opening the attenuation chamber 2 on both the left and right sides of the exhaust channel 11, noise reduction can be maximized and the noise attenuation effect on both sides of the exhaust channel 11 can be made more uniform.

[0053] In this embodiment, the attenuation chamber 2 is located on the side of the exhaust channel 11, which allows the oil in the exhaust to accumulate at the bottom of the exhaust channel 11 and flow out with the exhaust channel 11. This can improve the problem of oil retention in the attenuation chamber 2 and allow the oil to circulate more smoothly into the compressor.

[0054] In some embodiments, such as Figure 1 As shown, the inner wall of the second housing 1 is provided with a set of attenuation chambers 2 on the left and right sides of the exhaust channel 11, and each set of attenuation chambers 2 includes multiple attenuation chambers 2 spaced apart along the extension direction of the exhaust channel 11.

[0055] This embodiment enables the gas to gradually reduce noise as it flows through the attenuation chambers 2 arranged sequentially on the left and right sides during the exhaust channel 11. This not only makes full use of each attenuation chamber 2 but also achieves a better vibration reduction effect. Moreover, by simultaneously opening attenuation chambers 2 on the left and right sides of the exhaust channel 11, noise reduction can be maximized and the noise attenuation effect on the left and right sides of the exhaust channel 11 can be made more uniform.

[0056] In some embodiments, such as Figure 1 and Figure 4As shown, the noise reduction assembly 10 also includes a noise reduction plate 3, which is installed on the inner side wall of the second housing 1. The noise reduction plate 3 has perforations 31, and the exhaust channel 11 is connected to the attenuation cavity 2 through the perforations 31. For example, multiple perforations 31 are provided, and the perforations 31 can be set as polygons such as circles, ellipses, triangles, and rectangles.

[0057] This embodiment allows the gas in the exhaust channel 11 to enter the attenuation chamber 2 through the perforation 31 and then return to the exhaust channel 11 from the attenuation chamber 2. On the basis of noise reduction through the attenuation chamber 2, further noise reduction can be achieved by the noise reduction plate 3, which can attenuate noise over a wider frequency range and optimize the noise reduction effect.

[0058] In some embodiments, the noise reduction plate 3 is provided with a through hole 32, which corresponds to the position of the attenuation cavity 2. The through hole 32 is used to allow the airflow in the exhaust channel 11 to directly enter the attenuation cavity 2. The size of the through hole 32 is larger than that of the perforation 31. The shape of the through hole 32 can be the same as that of the attenuation cavity 2, but the size of the through hole 32 is smaller than that of the attenuation cavity 2, so that the perforation 31 is provided on the noise reduction plate 3 at a position on the outer periphery of the through hole 32.

[0059] This embodiment allows airflow in the exhaust channel 11 to freely enter and exit the attenuation chamber 2 by providing through holes 32 on the noise reduction plate 3, thereby improving the efficiency of noise reduction of exhaust.

[0060] In some embodiments, the noise reduction plate 3 is detachably mounted to the second housing 1. For example, the noise reduction plate 3 can be detachably mounted to the inner sidewall of the second housing 1 by means of fasteners.

[0061] In this embodiment, the noise reduction plate 3 is designed to be detachable, which facilitates the machining of the perforations 31 and through holes 32 on it. Furthermore, it allows for the design of a noise reduction plate 3 that matches the compressor's operating conditions. When the specifications of the noise reduction assembly 10 need to be changed, only the noise reduction plate 3 needs to be replaced, without requiring the second housing 1 and the noise reduction plate 3 to be re-machined as a whole. This allows the noise reduction assembly 10 to more flexibly adapt to the compressor's noise reduction requirements. Moreover, if a small amount of oil remains in the attenuation chamber 2, it is also convenient to remove the noise reduction plate 3 and drain the oil.

[0062] Alternatively, the second housing 1 and the noise reduction plate 3 can also be integrally formed, for example by casting, which can reduce the number of processing steps.

[0063] In some embodiments, the noise reduction assembly 10 includes a plurality of noise reduction plates 3, which have different numbers and / or layouts of perforations 31. The noise reduction plates 3 can be selectively installed in the second housing 1 according to the operating conditions of the compressor.

[0064] The number and diameter of the perforations 31 in the noise reduction plate 3 are determined according to the frequency band of noise that the compressor needs to attenuate. With multiple noise reduction plates 3 of different specifications provided in advance, the most matching noise reduction plate 3 can be selected and installed according to different models of the compressor. Alternatively, for the same compressor, noise reduction plates 3 that match the operating conditions can be selectively installed under different operating conditions in order to reduce noise in more frequency bands and adapt to noise reduction under different speeds and operating conditions.

[0065] In some embodiments, the perforation rate T on the noise reduction plate 3 is calculated using the following formula:

[0066]

[0067] Where L is the total length of the exhaust channel 11; D is the thickness of the noise reduction plate 3; r is the radius of the perforation 31; fr is the natural frequency of the attenuation cavity 2; and c0 is the sound velocity of the fluid in the exhaust channel 11.

[0068] This embodiment can determine the frequency band of exhaust noise that needs to be attenuated based on the compressor's different polarity speed, operating conditions, and natural frequency, thereby determining the number and diameter of the perforations 31 on the noise reduction plate 3 to reduce noise for specific frequency bands. By changing the size of the attenuation cavity 2 and the layout of the perforations 31 on the noise reduction plate 3, different noise reduction effects can be obtained to achieve on-demand noise reduction.

[0069] In some embodiments, such as Figure 1 As shown, the second housing 1 is also provided with an exhaust bearing housing cavity 12. The exhaust bearing housing cavity 12 is located at the top of the exhaust flow channel 11 and is connected to the exhaust flow channel 11. The length of the exhaust flow channel 11 is greater than the length of the exhaust bearing housing cavity 12.

[0070] Taking a screw compressor as an example, the end of the rotor can extend into the exhaust bearing housing 12. The exhaust bearing housing 12 is connected to the exhaust flow channel 11, and the end shape of the formed integral chamber matches the end shape of the exhaust chamber, so that the gas in the exhaust chamber can smoothly enter the second housing 1. Figure 2 As shown, a triangular transition connection 14 is provided at the stepped position formed by the exhaust bearing housing cavity 12 and the exhaust flow channel 11, which can increase the strength of the second housing 1.

[0071] This embodiment, by providing an exhaust bearing housing 12 within the second housing 1, allows the rotor to occupy a portion of the space within the noise reduction assembly 10, resulting in a more compact compressor structure and minimizing the compressor's axial dimensions. Furthermore, the length of the exhaust channel 11 is greater than the length of the exhaust bearing housing 12, providing a longer path for noise reduction after the gas enters the exhaust channel 11, thus optimizing the noise reduction effect.

[0072] In some embodiments, such as Figure 1As shown, an attenuation cavity 2 is provided on the inner wall of the exhaust flow channel 11 adjacent to the exhaust bearing housing cavity 12. The attenuation cavity 2 is connected to the exhaust flow channel 11, and the inner wall of the attenuation cavity 2 forms an inclined surface, which gradually approaches the center position of the exhaust flow channel 11 along the width direction from the top to the bottom. For example, the exhaust flow channel 11 can be an inverted trapezoid, and the attenuation cavity 2 is provided on both sides of the trapezoidal cavity.

[0073] This embodiment takes into account that the size of the exhaust bearing housing cavity 12 is larger than the size of the exhaust channel 11. By setting the side of the exhaust channel 11 as an inclined surface, a structural transition can be achieved. Moreover, by setting the attenuation cavity 2 on the side of the exhaust channel 11, the airflow in the exhaust bearing housing cavity 12 can also be guided into the exhaust channel 11 for noise reduction. In addition, by setting the inclined surface, the surface width of the attenuation cavity 2 and the noise reduction plate 3 can be increased, thereby increasing the area used for noise reduction of the airflow. Under the condition that the external dimensions of the second housing 1 are fixed, the noise reduction effect is optimized.

[0074] In some embodiments, such as Figure 1 and Figure 3 As shown, the inner wall of the second housing 1 is provided with a blocking part 4 at the junction of the exhaust bearing housing cavity 12 and the exhaust channel 11. The blocking part 4 is consistent with the extension direction of the exhaust channel 11.

[0075] This embodiment reduces the amount of gas entering the exhaust bearing housing 12 from the exhaust passage 11 by providing the blocking part 4, thereby reducing the impact of exhaust airflow pulsation on the rotor and improving the reliability of the compressor operation.

[0076] In some embodiments, the compressor is a screw compressor. Because the screw compressor periodically connects the compression chamber and the suction / discharge chamber during operation, it causes unstable gas flow, resulting in airflow pulsation in the suction / discharge chamber, thereby aggravating vibration noise within the suction / discharge chamber. By providing the noise reduction component 10 disclosed herein, a noise reduction component 10 that matches the operating conditions of the screw compressor can be flexibly configured to optimize the noise reduction effect.

[0077] The above are merely exemplary embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A compressor, characterized in that, include: The compression body includes a first housing, the first housing having an exhaust chamber and a first exhaust port, the first exhaust port being located at the tail end of the exhaust chamber; and The noise reduction component (10) is used to reduce the noise of the gas discharged from the first exhaust port. The noise reduction component (10) includes a second housing (1). The second housing (1) is provided with an exhaust channel (11), an air inlet (111), and a second exhaust port (112). The air inlet (111) and the second exhaust port (112) are respectively located at both ends of the exhaust channel (11). The end of the second housing (1) near the air inlet (111) is detachably connected to the end of the first housing near the first exhaust port. The air inlet (111) is connected to the first exhaust port. The second exhaust port (112) is used to discharge the noise-reduced gas. The noise reduction component (10) also includes a noise reduction plate (3), which is installed on the inner side wall of the second housing (1). The noise reduction plate (3) is provided with a perforation (31). The exhaust channel (11) is connected to the attenuation chamber (2) through the perforation (31). The exhaust channel (11) has an attenuation cavity (2) on its inner wall, which is connected to the exhaust channel (11). The inner wall of the second housing (1) has a set of attenuation cavities (2) on the left and right sides of the exhaust channel (11). Each set of attenuation cavities (2) includes multiple attenuation cavities (2) spaced apart along the extension direction of the exhaust channel (11). The second housing (1) also has an exhaust bearing seat cavity (12) located at the top of the exhaust channel (11) and connected to the exhaust channel (11).

2. The compressor according to claim 1, characterized in that, The main extension direction of the exhaust channel (11) is consistent with that of the exhaust chamber.

3. The compressor according to claim 1, characterized in that, The exhaust channel (11) extends in a straight line.

4. The compressor according to claim 1, characterized in that, The attenuation chambers (2) are provided at intervals along the extension direction of the exhaust channel (11).

5. The compressor according to claim 1, characterized in that, The noise reduction plate (3) is provided with a through hole (32), which corresponds to the position of the attenuation cavity (2). The through hole (32) is used to allow the airflow in the exhaust channel (11) to directly enter the attenuation cavity (2).

6. The compressor according to claim 1, characterized in that, The noise reduction plate (3) is detachably installed on the second housing (1).

7. The compressor according to claim 6, characterized in that, The noise reduction assembly (10) includes a plurality of noise reduction plates (3), the plurality of noise reduction plates (3) having different numbers of perforations (31) and / or perforation (31) layouts, and the noise reduction plates (3) are selectively installed in the second housing (1) according to the operating conditions of the compressor.

8. The compressor according to claim 1, characterized in that, The perforation rate T on the noise reduction plate (3) is calculated using the following formula: Wherein, L is the total length of the exhaust channel (11); D is the thickness of the noise reduction plate (3); r is the radius of the perforation (31); fr is the natural frequency of the attenuation cavity (2); and c0 is the sound velocity of the fluid in the exhaust channel (11).

9. The compressor according to claim 1, characterized in that, The length of the exhaust channel (11) is greater than the length of the exhaust bearing housing (12).

10. The compressor according to claim 9, characterized in that, The exhaust channel (11) is provided with an attenuation cavity (2) on the inner wall adjacent to the exhaust bearing seat cavity (12). The attenuation cavity (2) is connected to the exhaust channel (11), and the inner wall of the attenuation cavity (2) is provided to form an inclined surface. The inclined surface gradually approaches the center position of the exhaust channel (11) along the width direction from the top to the bottom.

11. The compressor according to claim 9, characterized in that, The inner wall of the second housing (1) is provided with a blocking part (4) at the junction of the exhaust bearing seat cavity (12) and the exhaust flow channel (11), and the blocking part (4) is consistent with the extension direction of the exhaust flow channel (11).

12. The compressor according to any one of claims 1 to 11, characterized in that, The compressor is a screw compressor.

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