Silencer of rotor compressor

Abstract

The utility model discloses a rotor compressor silencer which comprises a silencer body, a plurality of convex petals and a plurality of concave petals are distributed on the silencer body, high-pressure pulsating gas flowing out of an air cylinder sequentially flows through the convex petals and the concave petals of the silencer, due to the change of the volumes of inner cavities of the convex petals and inner cavities of the concave petals, when the high-pressure pulsating gas flows through, propagation loss can be generated, and gas noise is reduced. A center hole is formed in the center of the silencer body, and the silencer is installed on an upper bearing of an upper shaft of a rotor compressor crankshaft in a sleeving mode through the center hole. At least one group of air outlet holes are formed in the convex flaps, and high-pressure pulsating gas is discharged after the direction of the high-pressure pulsating gas is changed; inwards-concave reinforcing ribs are arranged on the concave petals, so that the size of an inner cavity of the concave petals is further reduced, the silencing capacity of the concave petals is enhanced, meanwhile, the rigidity of the silencer is improved, and sound radiation of the silencer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor mufflers, and particularly relates to a rotary compressor muffler. Background Art

[0002] As users' requirements for the noise value of air conditioners are getting lower and lower, reducing the noise value of the compressor, which is one of the main noise sources of air conditioners, has been the focus of research by various manufacturers.

[0003] In order to reduce the noise value of a rotary compressor, an exhaust muffler needs to be installed inside it. Existing mufflers, as Figure 1 shown, mainly design convex lobes and concave lobes on the muffler. By designing the cross-sectional change of the refrigerant flow and the volume of the muffler, the noise peak of broadband noise is attenuated targeted, thereby reducing the compressor noise value. However, the muffling effect achieved only through convex lobes and concave lobes is generally average and difficult to meet users' requirements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rotary compressor muffler to reduce the noise value during the operation of an air conditioner compressor.

[0005] To solve the above technical problems, the utility model provides a rotary compressor muffler, including a muffler body. A plurality of convex lobes and a plurality of concave lobes are distributed on the muffler body. The high-pressure pulsating gas flowing out from the cylinder flows through the convex lobes and concave lobes of the muffler in sequence. Due to the change in the volume of the convex lobe inner cavity and the concave lobe inner cavity, propagation loss will occur when the high-pressure pulsating gas flows through, reducing the gas noise.

[0006] A central hole is opened in the center of the muffler body, and the muffler is sleeved and installed on the upper bearing of the upper shaft of the rotary compressor crankshaft through the central hole.

[0007] At least one group of air outlet holes is arranged on the convex lobe and discharged after changing the direction of the high-pressure pulsating gas.

[0008] Inner concave reinforcing ribs are arranged on the concave lobe, so that the volume of the concave lobe inner cavity is further reduced, enhancing its noise elimination ability. At the same time, the stiffness of the muffler is improved, reducing its own sound radiation.

[0009] Preferably, the plurality of convex lobes and the plurality of concave lobes are alternately and spaced apart around the central axis on the muffler body.

[0010] Preferably, the air outlet holes are arranged at the top of the convex lobe, and the air outlet holes are of a side-turned edge structure, changing the vertical upward flow mode of the gas, avoiding the direct impact of the gas and the refrigeration oil, reducing the time for the refrigeration oil to flow back to the pump body position, enhancing the lubrication of the pump body, and improving its reliability.

[0011] Preferably, the air outlet angle of the air outlet hole is a, and the range of a is 30-150°.

[0012] Preferably, the concave reinforcing rib extends from the outer side of the concave lobe to the central hole.

[0013] Preferably, each of the concave lobes is provided with the concave reinforcing rib.

[0014] Preferably, the cross-sectional height of the concave reinforcing rib decreases from X to y, and the range of y is 0.6X-0.9X.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By designing a concave reinforcing rib on the upper plane of the concave lobe of the muffler, the lateral area of the cross-section where the refrigerant flows through is reduced, thereby increasing the sound attenuation of the muffler, while improving the stiffness of the muffler itself and reducing the surface sound radiation thereof;

[0017] 2. The refrigerating oil discharged from the oil outlet hole on the upper shaft of the crankshaft will be impacted by the gas discharged from the air outlet of the ordinary muffler to the upper part of the muffler. The present utility model designs a flanged air outlet hole to change the straight upward blowing of the gas, relieve the impact of the refrigerating oil to the upper part of the muffler, enable the refrigerating oil to quickly return to the pump body position, and prevent the wear of the pump body during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of an existing compressor muffler;

[0019] Figure 2 is a schematic structural view of a rotor compressor muffler provided by the present utility model;

[0020] Figure 3 is a schematic installation view of the muffler provided by the present utility model in the compressor;

[0021] Figure 4 is a top view of a rotor compressor muffler provided by the present utility model;

[0022] Figure 5 is a schematic view of the flanging angle of the air outlet hole of the muffler provided by the present utility model;

[0023] Figure 6 is a schematic view of the height of the concave reinforcing rib of the muffler provided by the present utility model.

[0024] In the figure: 1, convex lobe; 2, concave lobe; 3, central hole; 4, air outlet hole; 5, concave reinforcing rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following is a further detailed description of the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present utility model will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations. Embodiment

[0028] The present utility model provides a muffler for a rotary compressor. Please refer to Figure 2-4 , which includes a muffler body. A plurality of convex lobes 1 and a plurality of concave lobes 2 are distributed on the muffler body. The high-pressure pulsating gas flowing out of the cylinder flows through the convex lobes 1 and the concave lobes 2 of the muffler in sequence. Due to the change in the volume of the inner cavity of the convex lobe 1 and the inner cavity of the concave lobe 2, propagation loss will occur when the high-pressure pulsating gas flows through, reducing the gas noise; a central hole 3 is opened in the center of the muffler body, and the muffler is sleeved and installed on the upper bearing of the upper shaft of the crankshaft of the rotary compressor through the central hole 3; at least one set of air outlet holes 4 is provided on the convex lobe 1 to discharge the high-pressure pulsating gas after changing its direction; an inward concave reinforcing rib 5 is provided on the concave lobe 2, so that the volume of the inner cavity of the concave lobe 2 is further reduced, enhancing its noise reduction ability, and at the same time improving the stiffness of the muffler and reducing its own sound radiation.

[0029] Specifically, the plurality of convex lobes 1 and the plurality of concave lobes 2 are alternately and spaced apart around the central axis on the muffler body and are evenly distributed on the muffler body.

[0030] Specifically, the air outlet 4 is arranged at the top of the convex lobe 1, and the air outlet 4 has a side-turned edge structure, which changes the vertical upward flow mode of the gas, avoids the direct impact of the gas and the refrigeration oil, reduces the time for the refrigeration oil to flow back to the pump body position, enhances the lubrication of the pump body, and improves its reliability.

[0031] Furthermore, as Figure 5 shown, the air outlet angle of the air outlet 4 is a, and the range of a is 30 - 150°. The refrigeration oil discharged from the upper oil outlet hole of the crankshaft will be impacted by the gas discharged from the air outlet of the ordinary muffler to the upper part of the muffler. The present utility model designs a flanged air outlet to change the straight upward blowing of the gas, relieve the impact of the refrigeration oil to the upper part of the muffler, so that the refrigeration oil can quickly return to the pump body position and prevent the pump body from working wear.

[0032] Specifically, each concave lobe 2 is provided with the concave reinforcing rib 5, and the concave reinforcing rib 5 extends from the outside of the concave lobe 2 to the central hole 3.

[0033] Furthermore, the cross-sectional height of the concave reinforcing rib 5 decreases from X to y, and the range of y is 0.6X - 0.9X. By designing the concave reinforcing rib on the upper plane of the muffler concave lobe, the lateral area of the refrigerant flowing through this section is reduced, thereby increasing the sound attenuation amount of the muffler, improving the stiffness of the muffler itself at the same time, and reducing its surface sound radiation.

[0034] The above description is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the art of the present utility model according to the above disclosure are within the protection scope of the claims.

Claims

1. A rotor compressor muffler, characterized in that: The muffler comprises a muffler body, wherein a plurality of convex lobes (1) and a plurality of concave lobes (2) are distributed on the muffler body, and the high-pressure pulsating gas flowing out of the cylinder flows through the convex lobes (1) and the concave lobes (2) of the muffler in sequence, and due to the change in the volume of the inner cavity of the convex lobe (1) and the inner cavity of the concave lobe (2), the high-pressure pulsating gas will generate transmission loss when flowing through, thereby reducing gas noise; A center hole (3) is provided at the center of the muffler body, and the muffler is sleeved and installed on the upper bearing of the upper shaft of the rotary compressor crankshaft through the center hole (3); At least one group of gas outlet holes (4) are provided on the convex petal (1) to change the direction of the high-pressure pulsating gas and discharge it; The concave petal (2) is provided with an inwardly concave reinforcing rib (5), so that the inner cavity volume of the concave petal (2) is further reduced, thereby enhancing its noise reduction capability, while also increasing the stiffness of the silencer and reducing its own sound radiation.

2. A rotary compressor muffler as claimed in claim 1, characterized in that: The plurality of convex lobes (1) and the plurality of concave lobes (2) are distributed on the muffler body at staggered intervals around the central axis.

3. A rotary compressor muffler as claimed in claim 1, characterized in that: The air outlet hole (4) is arranged at the top of the convex petal (1), and the air outlet hole (4) is a side flange structure, which changes the vertical upward flow mode of the gas, avoids direct impact between the gas and the refrigeration oil, reduces the time for the refrigeration oil to flow back to the pump body, enhances the lubrication of the pump body, and improves its reliability.

4. A rotary compressor muffler as claimed in claim 3, characterized in that: The outlet angle of the air outlet hole (4) is a, and the range of a is 30-150°.

5. A rotary compressor muffler as claimed in claim 1, characterized in that: The concave reinforcing rib (5) extends from the outer side of the concave petal (2) to the central hole (3).

6. A rotary compressor muffler as claimed in claim 5, characterized in that: Each of the concave petals (2) is provided with the concave reinforcing rib (5).

7. A rotary compressor muffler as claimed in claim 5, characterized in that: The cross-sectional height of the concave reinforcing rib (5) decreases from X to y, and the range of y is 0.6X to 0.9X.

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