Silencer, compressor and heating and ventilation equipment

Abstract

The utility model discloses a silencer, a compressor and heating and ventilation equipment, the compressor comprises a machine shell, a compression mechanism and a motor, the compression mechanism and the motor are arranged in the machine shell, the silencer comprises a silencing cavity shell and a flow guide cover, the silencing cavity shell is used for being arranged between the compression mechanism and the motor, and the silencing cavity shell is provided with an inner cavity communicating with an air outlet hole of the compression mechanism; an exhaust hole communicated with the inner cavity is formed in the surface, facing the motor, of the silencing cavity shell; the flow guide cover is connected to the silencing cavity shell and located at the exhaust hole, the flow guide cover is provided with an airflow outlet, the airflow outlet faces the tangential direction of a circumcircle which takes the center of the silencing cavity shell as the circle center and passes through the center of the exhaust hole, and the flow guide cover is used for guiding at least one part of airflow sprayed out of the exhaust hole so that the airflow can be sprayed out of the airflow outlet. According to the technical scheme, the problem that in the prior art, axial vibration of the compressor is serious due to exhaust airflow in a silencer of the compressor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a muffler, a compressor and a HVAC device. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the HVAC system. It sucks low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it by driving the piston through the motor, and discharges high-temperature, high-pressure refrigerant gas into the exhaust pipe, providing power for the refrigeration cycle.

[0003] In order to reduce the exhaust noise of the compressor, a muffler is generally installed on the exhaust port of the cylinder component. The muffler reduces the sound pressure through the expansion chamber principle. However, after the high-speed airflow is discharged from the outlet of the muffler, it will directly impact the motor rotor above the cylinder component, causing the axial vibration of the rotor to worsen. At the same time, the vibration will be transmitted to the compressor casing, causing the axial vibration of the compressor body to worsen, thereby generating noise. Utility Model Content

[0004] The embodiments of the present application provide a muffler, a compressor and a HVAC device to solve the problem in the prior art that the exhaust gas flow in the muffler of the compressor causes severe axial vibration of the compressor.

[0005] In a first aspect, an embodiment of the present application provides a muffler applied to a compressor, wherein the compressor includes a casing, a compression mechanism and a motor arranged in the casing, and the muffler includes:

[0006] A muffler shell, the muffler shell being used to be arranged between the compression mechanism and the motor, the muffler shell having an inner cavity connected to the air outlet of the compression mechanism, and an exhaust hole connected to the inner cavity is opened on the surface of the muffler shell facing the motor; and

[0007] A guide cover is connected to the silencer shell and is located at the exhaust hole. The guide cover has an airflow outlet. The direction of the airflow outlet is the tangent direction of a circumscribed circle with the center of the silencer shell as the center and passing through the center of the exhaust hole. The guide cover is used to guide at least a portion of the airflow ejected from the exhaust hole so that it can be ejected from the airflow outlet.

[0008] In some of the embodiments, a plurality of exhaust holes are provided on the surface of the muffler chamber shell facing the motor, and the muffler includes a plurality of air guide covers, and the air flow outlets of the plurality of air guide covers are oriented clockwise or counterclockwise along the circumference of the muffler chamber shell.

[0009] In some embodiments, a plurality of exhaust holes are provided on the surface of the silencer chamber shell facing the motor, the silencer includes a plurality of air guide covers, the number of the air guide covers that are arranged counterclockwise along the circumference of the silencer chamber shell with the air flow outlet facing the first number, the number of the air guide covers that are arranged clockwise along the circumference of the silencer chamber shell with the air flow outlet facing the second number, and the first number is equal to the second number.

[0010] In some embodiments, the air guide hood whose airflow outlet is arranged counterclockwise along the circumference of the muffler chamber shell and the air guide hood whose airflow outlet is arranged clockwise along the circumference of the muffler chamber shell are symmetrically arranged about the center of the muffler chamber shell.

[0011] In some embodiments, the inner surface of the air guide cover facing the exhaust hole is arranged in an arc shape.

[0012] In some of the embodiments, the deflector is arranged in a quarter-spherical crown shape;

[0013] Alternatively, the air guide cover is arranged in an arched structure, and the air flow outlets are formed at opposite ends of the arched structure.

[0014] In some embodiments, the exhaust hole includes a first outlet area and a second outlet area that are connected to each other, a projection of the air guide cover toward the exhaust hole covers the first outlet area, and the second outlet area is located outside the air guide cover.

[0015] In some embodiments, the first outlet region and the second outlet region have comparable areas.

[0016] In some embodiments, the muffler chamber shell and the air guide cover are an integral structure.

[0017] In a second aspect, an embodiment of the present application provides a compressor, which includes a casing, a compression mechanism, a motor and a muffler as described above, wherein the compression mechanism, the motor and the muffler are all installed in the casing, the motor is used to drive the compression mechanism, and the muffler is fixed to the compression mechanism.

[0018] In a third aspect, an embodiment of the present application provides a HVAC device, which includes the above-mentioned compressor, and the indoor unit transmits refrigerant with the compressor.

[0019] Based on the muffler, compressor and HVAC equipment of the embodiment of the present application, a guide cover is provided to be connected to the muffler shell and located at the exhaust hole, and the guide cover has an airflow outlet, and the direction of the airflow outlet is the tangent direction of the circumscribed circle with the center of the muffler shell as the center and passing through the center of the exhaust hole, so as to guide at least a part of the airflow ejected from the exhaust hole to be ejected from the airflow outlet. In this way, the high-speed airflow toward the motor is blocked and its flow direction is changed by the guide cover, and the airflow directly hitting the motor is reduced, which not only improves the running stability of the motor, but also reduces the axial excitation of the airflow to the motor, thereby reducing the noise generated by the axial movement of the motor, thereby improving the axial vibration of the compressor, and at the same time, the direction of the airflow outlet is the tangent direction of the circumscribed circle with the center of the muffler shell as the center and passing through the center of the exhaust hole so that part of the airflow is ejected and diverged to avoid directly impacting the casing, so that the path of part of the airflow to the casing of the compressor is extended, thereby also reducing the impact force on the casing of the compressor, reducing the possibility of generating additional vibration and noise, so as to further improve the noise reduction effect of the muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of a compression mechanism of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of the muffler of this application;

[0023] Figure 3 This is a schematic structural diagram of the muffler of this application from another perspective;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0025] Description of Figure Numbers:

[0026] 100, muffler; 10, muffler chamber shell; 11, exhaust hole; NA, first outlet area; NB, second outlet area; 12, connecting hole; 13, opening; 20, air guide cover; 21, air flow outlet; 1000, compressor; 200, casing; 300, compression mechanism; 301, cylinder assembly; 302, upper bearing; 303, lower bearing; 304, crankshaft; 400, motor.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0029] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0030] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the HVAC system. It sucks low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it by driving the piston through the operation of motor 400, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0033] In order to reduce the exhaust noise of the compressor, a muffler is generally installed on the exhaust port to reduce the sound pressure through the expansion cavity principle. However, after the high-speed airflow is discharged from the outlet of the muffler, it will directly impact the motor rotor on the upper part of the compressor, causing the axial vibration of the rotor to worsen. At the same time, the pump body is transmitted to the compressor casing, causing the axial vibration of the compressor body to worsen, thereby generating noise.

[0034] To solve the above problems, one aspect of the present application proposes a HVAC device. In the embodiment of the present application, the HVAC device includes an air conditioner, a multi-split unit, a heat pump, and other devices for heating or cooling. The HVAC device includes an indoor unit (not shown in the figure) and an outdoor unit (not shown in the figure). The outdoor unit includes a chassis and a compressor disposed on the chassis. The compressor is connected to the indoor unit for refrigerant transmission, thereby playing a role in regulating the indoor environment.

[0035] Please combine Figure 1 Another aspect of the embodiment of the present application provides a compressor 1000, which includes a housing 200, a compression mechanism 300, a motor 400 and a muffler 100. The compression mechanism 300, the motor 400 and the muffler 100 are all installed in the housing 200, and the motor 400 is connected to the compression mechanism 300, and the compression mechanism 300 is driven by the motor 400 so that the compression mechanism 300 can compress the gas. The muffler 100 is fixed to the compression mechanism 300, and the muffler 100 is used to reduce the noise of the high-pressure gas discharged from the compression mechanism 300.

[0036] Among them, the housing 200 can be made of metal, such as steel, aluminum and other materials with strong strength, or it can be made of hard plastic material with strong strength to improve the protection of the compression mechanism 300, the motor 400 and the muffler 100. The compression mechanism 300 includes a cylinder assembly 301, an upper bearing 302, a lower bearing 303 and a crankshaft 304. The crankshaft 304 connects the cylinder assembly 301 and the motor 400, and the motor 400 drives the crankshaft 304 to rotate, thereby driving the cylinder assembly 301 to operate, so as to compress gas, such as compressing refrigerant. The upper bearing 302 and the lower bearing 303 are respectively installed at both ends of the cylinder assembly 301 to seal the two ends of the cylinder assembly 301, and can reduce the resistance to the crankshaft 304, so that the crankshaft 304 can rotate flexibly. An air outlet is provided on the upper bearing 302 for the high-pressure gas in the cylinder assembly 301 to be discharged.

[0037] The muffler 100 is mounted on the upper bearing 302, so that the high-pressure gas discharged from the cylinder assembly 301, such as the high-pressure refrigerant, can enter the inner cavity of the muffler 100 from the upper bearing 302 to achieve noise reduction and silence, thereby reducing the noise of the compressor 1000. Of course, two or more mufflers 100 can also be stacked in sequence, and their inner cavities are connected in sequence, so that the high-pressure gas passes through the inner cavity of each muffler 100 in sequence to reduce noise, so as to further improve the noise reduction effect.

[0038] To solve the problem that the exhaust gas flow in the muffler 100 causes severe axial vibration of the compressor 1000, please refer to Figures 1 to 3The third aspect of the present application proposes a muffler 100 . In an embodiment of the present application, the muffler 100 includes a muffler chamber shell 10 and a guide cover 20 .

[0039] The muffler shell 10 is fixed on the upper bearing 302 of the compression mechanism 300 so as to be located between the compression mechanism 300 and the motor 400, and the inner cavity of the muffler shell 10 is connected to the air outlet of the upper bearing 302 of the compression mechanism 300, so that when the high-pressure airflow enters the inner cavity of the muffler shell 10 and uses the expansion and contraction of the cross-sectional area of ​​the inner cavity to cause the reflection and interference of the sound waves to perform noise elimination. The surface of the muffler shell 10 facing the motor 400 is provided with an exhaust hole 11 connected to the inner cavity, so that the high-pressure airflow discharged from the air outlet of the upper bearing 302 can be discharged from the exhaust hole 11 after passing through the inner cavity of the muffler shell 10 for noise elimination.

[0040] In some structural forms, the muffler shell 10 is a thin-walled shell structure to facilitate processing and reduce costs. Moreover, this structure can also reduce the weight of the muffler shell 10. It can be understood that the muffler shell 10 can also be processed and manufactured using a block structure, such as processing the muffler shell 10 in a block. One end of the muffler shell 10 is provided with an open shape, so that when the muffler shell 10 is installed on the upper bearing 302, the air outlet on the upper bearing 302 can be more conveniently accommodated in the open, so that the gas discharged from the air outlet of the upper bearing 302 can directly enter the muffler cavity to achieve silencing and noise reduction. The other end of the muffler shell 10 is provided with an opening 13, so that when the muffler shell 10 is installed on the upper bearing 302, the crankshaft 304 can be inserted into the opening 13, that is, the muffler shell 10 is sleeved on the crankshaft 304, so that the muffler shell 10 is installed on the upper bearing 302, which is convenient for the assembly of the muffler shell 10. At the same time, the exhaust hole 11 can be set on the same surface as the opening 13 to facilitate simultaneous processing. In addition, the muffler shell 10 is provided with a connection hole 12, and the upper bearing 302 is provided with a threaded hole corresponding to the connection hole 12, so that the muffler shell 10 is fixed to the upper bearing 302 by passing a screw through the connection hole 12 and connecting to the threaded hole, so as to achieve the fixation of the muffler shell 10, thereby ensuring the stability of the muffler shell 10 in terms of silencing and noise reduction. Of course, the muffler shell 10 can also be fixed to the upper bearing 302 by means of a buckle or the like, and the specific method can be selected by those skilled in the art according to needs.

[0041] The air guide cover 20 is connected to the muffler shell 10 and is located at the exhaust hole 11. The air guide cover 20 has an air flow outlet 2121. Figure 3The direction S of the dashed arrow is the direction of the airflow outlet 21. The direction of the airflow outlet 21 is the tangent direction of the circumscribed circle with the center of the muffler chamber shell 10 as the center and passing through the center of the exhaust hole 11. The air guide cover 20 is used to guide at least a part of the airflow ejected from the exhaust hole 11 to be ejected from the airflow outlet 21. The air guide cover 20 can be connected to the inner wall of the exhaust hole 11 of the muffler chamber shell 10 and extend to the outside of the exhaust hole 11 to guide at least a part of the airflow ejected from the exhaust hole 11. Alternatively, the air guide cover 20 can also be directly connected to the surface of the muffler chamber shell 10 facing the motor 400, and extend to cover part of the exhaust hole 11, so as to guide at least a part of the airflow ejected from the exhaust hole 11 and eject it from the airflow outlet 21.

[0042] Thus, the embodiment of the present application sets a guide cover 20 to be connected to the muffler shell 10 and located at the exhaust hole 11. The guide cover 20 has an airflow outlet 21. The direction of the airflow outlet 21 is the tangent direction of the circumscribed circle with the center of the muffler shell 10 as the center and passing through the center of the exhaust hole 11, so as to guide at least a part of the airflow ejected from the exhaust hole 11 to be ejected from the airflow outlet 21. Thus, the guide cover 20 is used to block the high-speed airflow toward the motor 400 and change its flow direction, thereby reducing the airflow directly hitting the motor 400, not only improving the running stability of the motor 400, but also reducing the axial excitation of the motor 400 by the airflow, thereby reducing the noise generated by the axial movement of the motor 400, and further improving the axial vibration of the compressor 1000. At the same time, the direction of the air flow outlet 21 is in the tangent direction of the circumscribed circle with the center of the silencer chamber shell 10 as the center and passing through the center of the exhaust hole 11, so that part of the air flow can avoid directly impacting the casing 200 after being ejected and diverged, so that the path of part of the air flow to the casing 200 of the compressor 1000 is extended, thereby reducing the impact force on the casing 200 of the compressor 1000 and reducing the possibility of generating additional vibration and noise, so as to further improve the noise reduction effect of the muffler 100.

[0043] Reference Figures 2 to 4In order to improve the exhaust efficiency of the muffler cavity shell 10, a plurality of exhaust holes 11 are provided on the surface of the muffler cavity shell 10 facing the motor 400, and the muffler 100 includes a plurality of air guide covers 20, so that a plurality of air guide covers 20 can be provided corresponding to one exhaust hole 11, or a single air guide cover 20 can be provided corresponding to one exhaust hole 11. Thus, by correspondingly providing a plurality of air guide covers 20 to match the plurality of exhaust holes 11, the airflow of the plurality of exhaust holes 11 can be guided. It should be noted that in one structural embodiment, the air flow outlets 21 of the multiple air guide covers 20 are oriented clockwise or counterclockwise along the circumference of the silencer chamber shell 10. This can reduce the axial excitation to the motor 400, and at the same time, the airflow guided by the multiple air guide covers 20 is sprayed in the same direction, so that the consistency of the horizontal circumferential airflow of the silencer chamber shell 10 is achieved, and the shaking of the silencer chamber shell 10 caused by the airflow collision is reduced, thereby improving the stability of the muffler 100 in the horizontal direction, and further improving the noise reduction effect of the muffler 100.

[0044] In another structural embodiment, the number of air guide covers 20 arranged counterclockwise along the circumference of the muffler shell 10 with the air outlet 21 is a first number, and the number of air guide covers 20 arranged clockwise along the circumference of the muffler shell 10 with the air outlet 21 is a second number, and the first number is equal to the second number. In this way, by controlling the number of the two to be the same, the clockwise airflow of the muffler shell 10 and the counterclockwise airflow of the muffler shell 10 are neutralized to reduce the shaking of the muffler shell 10 caused by the airflow collision, thereby improving the stability of the muffler 100 in the horizontal direction, and further improving the noise reduction effect of the muffler 100.

[0045] Furthermore, the air guide 20 whose air outlet 21 is arranged counterclockwise along the circumference of the muffler shell 10 and the air guide 20 whose air outlet 21 is arranged clockwise along the circumference of the muffler shell 10 are symmetrically arranged about the center of the muffler shell 10. In this way, the arrangement of the multiple air guides 20 is further symmetrical, so that the airflows in different directions can be better neutralized, thereby further improving the stability of the muffler 100 in the horizontal direction, and further improving the noise reduction effect of the muffler 100.

[0046] Reference Figures 2 to 4 In some structural forms, the inner surface of the air guide cover 20 facing the exhaust hole 11 is arranged in an arc surface. In this way, when the high-speed and high-pressure refrigerant gas is ejected from the exhaust hole 11 and contacts the air guide cover 20 for guidance, the gas turns and flows more smoothly, reducing the occurrence of loud noise caused by sudden angle changes, and reducing gas loss, so as to ensure the stability of gas performance in the compressor 1000.

[0047] Reference Figures 2 to 4In some structural forms, the air deflector 20 is arranged in a quarter spherical crown shape. Among them, the spherical crown-shaped inner concave surface of the air deflector 20 is arranged toward the exhaust hole 11, so that the air deflector 20 can increase the space for guiding the exhaust hole 11 to better guide the airflow of the exhaust hole 11, and at the same time, the outer surface of the air deflector 20 is arranged in an arc surface. When the muffler 100 is disassembled and assembled, the air deflector 20 with an arc-shaped outer surface is not easy to cut the installer due to the sharp outer surface, thereby improving the safety of the installer during installation and improving the protection of other components of the casing 200 of the compressor 1000.

[0048] In some structural forms, the air deflector 20 is arranged in an arched structure, and airflow outlets 21 are formed at both opposite ends of the arched structure. The inner concave surface of the arched structure is arranged toward the exhaust hole 11, that is, the air deflector 20 can be arranged in an inverted U shape, so that the space for the air deflector 20 to guide the exhaust hole 11 can be increased to better guide the airflow of the exhaust hole 11, and the outer surface of the air deflector 20 is arranged in an arc surface, thereby improving the safety of the installer during installation and improving the protection of other parts of the casing 200 of the compressor 1000. At the same time, the airflow outlets 21 are formed at both opposite ends of the arched structure, which will further improve the exhaust efficiency of the air deflector 20, so that even if the opening at one end of the air deflector 20 is blocked, the opening at the other end can also be used for exhaust and silence, thereby improving the stability of the use of the air deflector 20.

[0049] Reference Figures 2 to 4 Optionally, the exhaust hole 11 includes a first outlet area NA and a second outlet area NB which are connected to each other, and the projection of the air guide cover 20 toward the exhaust hole 11 covers the first outlet area NA, and the second outlet area NB is located on the outside of the air guide cover 20. The exhaust hole 11 can be in a regular shape such as a circle or a square to facilitate processing. The portion of the exhaust hole 11 covered by the air guide cover 20 is defined as the first outlet area NA, and the portion of the exhaust hole 11 not covered by the air guide cover 20 is defined as the second outlet area NB. Thus, on the basis of guiding the jet airflow of the exhaust hole 11, the exhaust resistance of the jet airflow of the exhaust hole 11 is reduced at the same time, thereby reducing the loss of gas to ensure the stability of the gas performance in the compressor 1000. It can be understood that the airflow in the first outlet area NA can guide the airflow in the second outlet area NB to be ejected along the circumferential direction of the muffler shell 10.

[0050] Furthermore, the areas of the first outlet area NA and the second outlet area NB are comparable. This improves the balance between the airflow guidance and exhaust efficiency of the exhaust hole 11, and further takes into account the airflow performance and noise reduction effect in the muffler 100. It can be understood that the areas of the first outlet area NA and the second outlet area NB are comparable, which can be understood as the areas of the first outlet area NA and the second outlet area NB are completely consistent in the optimal state. Of course, in the actual production process, there are processing errors, so the areas of the two areas being comparable can also be understood as there being some small numerical differences between the areas of the two areas.

[0051] Optionally, the muffler shell 10 and the air guide cover 20 are an integrated structure. That is, the muffler shell 10 and the air guide cover 20 can be directly made into one piece by stamping, so that the connection firmness of the muffler shell 10 and the air guide cover 20 can be further improved, so that the overall structural strength of the air guide cover 20 is stronger, thereby improving the stability of the airflow guide ejected from the exhaust hole 11. Of course, in other structural forms, the muffler shell 10 and the air guide cover 20 can also be a split structure and fixed by gluing, clamping, etc., and the embodiment of the present application is not limited to this.

[0052] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A muffler, applied to a compressor, the compressor comprising a casing, a compression mechanism and a motor arranged in the casing, characterized in that: The muffler comprises: A muffler shell, the muffler shell being used to be arranged between the compression mechanism and the motor, the muffler shell having an inner cavity connected to the air outlet of the compression mechanism, and an exhaust hole connected to the inner cavity is opened on the surface of the muffler shell facing the motor; and A guide cover is connected to the silencer shell and is located at the exhaust hole. The guide cover has an airflow outlet. The direction of the airflow outlet is the tangent direction of a circumscribed circle with the center of the silencer shell as the center and passing through the center of the exhaust hole. The guide cover is used to guide at least a portion of the airflow ejected from the exhaust hole so that it can be ejected from the airflow outlet.

2. The muffler according to claim 1, characterized in that The muffler includes a plurality of air guide covers, and the directions of the air flow outlets of the plurality of air guide covers are all arranged clockwise or counterclockwise along the circumference of the muffler chamber shell.

3. The muffler according to claim 1, characterized in that The surface of the muffler shell facing the motor is provided with a plurality of exhaust holes, and the muffler includes a plurality of guide covers; The number of the air guide covers whose air outlets are arranged counterclockwise along the circumference of the muffler chamber shell is a first number, and the number of the air guide covers whose air outlets are arranged clockwise along the circumference of the muffler chamber shell is a second number, and the first number is equal to the second number.

4. The muffler according to claim 3, characterized in that The air guide cover whose air outlet is arranged counterclockwise along the circumference of the muffler shell and the air guide cover whose air outlet is arranged clockwise along the circumference of the muffler shell are symmetrically arranged about the center of the muffler shell.

5. The muffler according to claim 1, characterized in that The inner surface of the air guide cover facing the exhaust hole is arranged in a curved surface.

6. The muffler according to claim 1, characterized in that The deflector is arranged in a quarter-spherical crown shape; Alternatively, the air guide cover is arranged in an arched structure, and the air flow outlets are formed at opposite ends of the arched structure.

7. The muffler according to claim 1, characterized in that The exhaust hole comprises a first outlet area and a second outlet area which are connected to each other. The projection of the air guide cover toward the exhaust hole covers the first outlet area, and the second outlet area is located outside the air guide cover.

8. The muffler according to claim 7, characterized in that The first outlet region and the second outlet region have a comparable area.

9. The muffler according to any one of claims 1 to 8, characterized in that: The muffler cavity shell and the air guide cover are an integrated structure.

10. A compressor, characterized in that: It comprises a casing, a compression mechanism, a motor and a muffler as described in any one of claims 1 to 9, wherein the compression mechanism, the motor and the muffler are all installed in the casing, the motor is used to drive the compression mechanism, and the muffler is fixed to the compression mechanism.

11. A HVAC equipment, characterized in that: It comprises an indoor unit and an outdoor unit, the outdoor unit comprises the compressor as claimed in claim 10, and the indoor unit transmits refrigerant with the compressor.

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