Silencer and rotor compressor including the same

Abstract

The present invention provides a muffler and a rotor compressor including the same, wherein the muffler includes at least one split tip structure; the split tip structure includes at least one first split tip; the first split tip includes two first absorption slopes and two first side surfaces; the muffler is connected to the inner wall of the compressor shell at the bottom of the first split tip; holes are provided on at least one of the first absorption slope and the first side surface. When the airflow in the compressor passes through the muffler of the present invention, the holes increase the flow friction of the airflow, and the airflow pulsation is converted into heat energy. At the same time, the sound absorption frequency band can be adjusted by adjusting the hole size, hole distribution and the cavity size of the split tip structure; the muffler of the present invention can effectively reduce the high-frequency airflow pulsation in the compressor while affecting the flow resistance of the refrigerant to a small extent. The reduction of high-frequency airflow pulsation can effectively reduce the noise of the air conditioner outdoor unit and the noise of the air conditioner indoor unit, and optimize the user experience when using the product.

Description

Technical Field

[0001] The present invention relates to the field of compressors, in particular to a muffler and a rotor type compressor comprising the muffler. Background Art

[0002] Airflow noise is an important source of noise in the air conditioner's rotary compressor, and it will cause noise in the air conditioner's internal unit, reducing the user experience and competitiveness of air conditioner products. In order to reduce airflow noise, a muffler is usually installed in the compressor. However, the existing muffler has poor noise reduction effect in the high-frequency band. Studies have shown that attaching a layer of sound insulation material to the inner layer of the compressor casing can reduce the noise in the high-frequency band to a certain extent, but the thickness of the attached sound insulation material will cause changes in the effective volume inside the compressor, and also increase the difficulty of assembly. How to reduce the airflow noise inside the compressor has always been a research topic in the field of compressor technology.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the problems in the prior art, the purpose of the present invention is to provide a silencer and a rotor-type compressor including the same, which can effectively increase the air flow friction in the compressor, while affecting the flow resistance of the refrigerant to a lesser extent, and can effectively reduce the high-frequency air flow pulsation in the compressor, thereby reducing the air flow noise of the compressor.

[0005] Some embodiments of the present invention provide a sound-absorbing member, comprising at least one split-point structure;

[0006] The split tip structure includes at least one first split tip;

[0007] The first wedge tip includes two first absorbing inclined surfaces and two first side surfaces;

[0008] The muffler is connected to the inner wall of the compressor housing at the bottom of the first split tip;

[0009] At least one of the first absorbing inclined surface and the first side surface is provided with holes.

[0010] According to some examples of the present invention, the first side surface is in a wedge-shaped shape and includes two second absorption inclined surfaces.

[0011] According to some examples of the present invention, an oil drain hole is provided at the junction of the two absorption slopes.

[0012] According to some examples of the present invention, holes are provided on the second absorption slope.

[0013] According to some examples of the present invention, the hole is circular, elliptical, plum blossom-shaped or polygonal.

[0014] According to some examples of the present invention, when the hole is circular, the diameter of the hole is d, and d≤1.0 mm.

[0015] According to some examples of the present invention, on the surface provided with the holes, the hole ratio is less than 10%.

[0016] According to some examples of the present invention, the wedge tip structure includes a plurality of the first wedge tips;

[0017] The first absorbing inclined surfaces of a plurality of the first wedge tips are connected in sequence to form a wave shape.

[0018] According to some examples of the present invention, the first cleavage tip is a multi-layer structure.

[0019] Some other embodiments of the present invention further provide a rotor type compressor, which includes a plurality of the above-mentioned silencers.

[0020] According to some examples of the present invention, a plurality of the silencers are disposed on an inner wall of a casing between a motor and an upper casing cover or between a motor and an upper cylinder cover of the compressor.

[0021] According to some examples of the present invention, a plurality of the silencers are disposed at the same height of the compressor housing and are evenly distributed along the circumference of the inner wall of the compressor housing.

[0022] According to some examples of the present invention, a plurality of the silencers are arranged at different heights of the compressor housing to form a multi-layer structure and are distributed circumferentially along the inner wall of the compressor housing.

[0023] When the airflow in the compressor passes through the silencer of the present invention, the holes increase the flow friction of the airflow, and the airflow pulsation is converted into heat energy. At the same time, the sound absorption frequency band can be adjusted by adjusting the hole size, hole distribution and the cavity size of the wedge-shaped structure. The silencer of the present invention can effectively reduce the high-frequency airflow pulsation in the compressor while affecting the flow resistance of the refrigerant to a relatively small extent. The reduction of high-frequency airflow pulsation can effectively reduce the noise of the air conditioner outdoor unit and the air conditioner indoor unit, optimize the user experience when using the product, and improve the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0025] Figure 1 A schematic structural diagram of a sound-absorbing member according to a first embodiment of the present invention;

[0026] Figure 2A schematic structural diagram of a sound-absorbing member according to a second embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of a sound-absorbing member according to a third embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a sound-absorbing member according to a fourth embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of a sound-absorbing member according to a fifth embodiment of the present invention;

[0030] Figure 6 A schematic structural diagram of a rotary compressor according to an embodiment of the present invention;

[0031] Figure 7 It is a noise reduction comparison diagram of a rotor compressor without and with the silencer of the present invention. DETAILED DESCRIPTION

[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present invention will be comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limitations of the present invention. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0033] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0036] In order to solve the problems in the prior art, some embodiments of the present invention provide a silencer, comprising at least one split-point structure; the split-point structure comprises at least a first split point; the first split point comprises two first absorption slopes and two first side surfaces; the silencer is connected to the inner wall of the compressor casing at the bottom of the first split point; holes are provided on at least one of the first absorption slopes or the first side surfaces.

[0037] The silencer of the present invention includes at least one split-point structure, on which holes are arranged. When the airflow in the compressor passes through a plurality of silencers arranged on the inner wall of the compressor, the holes increase the flow friction of the airflow, and the airflow pulsation is converted into heat energy, which can effectively reduce the high-frequency airflow pulsation and at the same time affect the flow resistance of the refrigerant to a lesser extent, thereby achieving stable performance of the compressor while reducing the airflow noise of the compressor.

[0038] The structure of the muffler of the present invention is described below in conjunction with specific embodiments, which are only several specific implementations and are not intended to limit the scope of protection of the present invention.

[0039] Figure 1 This is a schematic structural diagram of a silencer according to a first embodiment of the present invention. In this embodiment, the silencer includes a split-point structure 100; the split-point structure 100 includes a first split point; the first split point includes two first absorbing slopes 110 and two first side surfaces 120a, 120b; holes 130 are provided on the two first absorbing slopes 110.

[0040] The intersection of the two first absorbing inclined surfaces 110 is the tip side of the first split tip, and the other side is the bottom side of the first split tip. The bottom side of the first split tip can be provided with a bottom surface, which is connected to the inner wall of the shell of the compressor through the bottom surface. The two first absorbing inclined surfaces 110, the two first side surfaces 120a, 120b and the bottom surface constitute a cavity, and the thickness of the first absorbing inclined surfaces 110 and the first side surfaces 120a or 120b can be less than 2.0 mm.

[0041] The holes 130 disposed on the first absorption slope 110 and the above-mentioned cavity constitute a passage for the air flow in the compressor. When the air flow passes through the holes 130, the air flow pulsation is converted into heat energy, thereby reducing high-frequency air flow pulsation.

[0042] In the first embodiment, connection with the inner wall of the compressor shell can also be achieved through the side edges on the bottom ends of the two first absorption slopes 110 and / or the side edges on the bottom ends of the two first side surfaces 120a, 120b. At this time, the two first absorption slopes 110, the two first side surfaces 120a, 120b and the inner wall of the compressor shell form a cavity.

[0043] Figure 2 Schematic diagram of the structure of the sound-absorbing member according to the second embodiment of the present invention. In this embodiment, a first side surface 120b is in a wedge-shaped shape, that is, the first side surface 120b itself can be regarded as a structure including two second absorbing inclined surfaces.

[0044] The angle between the two second absorbing inclined surfaces is not limited and can be any value between 0° and 180°. It is worth noting that when the angle between the two second absorbing inclined surfaces is 180°, the first side surface 120b is a plane, that is, it becomes the structure in the first embodiment. An oil drain hole (not shown in the figure) for draining oil can be set at the junction of the two absorbing inclined surfaces.

[0045] When the silencer is disposed in the compressor, the wedge-shaped first side surface 120b is on the airflow section, and the wedge-shaped structure can reduce the resistance to the airflow, thereby affecting the flow of the refrigerant to a lesser extent, stabilizing the performance of the compressor while reducing the airflow noise through the silencer.

[0046] Of course, holes can also be provided on the two second absorption slopes.

[0047] Figure 3 and Figure 4 The schematic diagrams of the structures of the sound-absorbing parts of the third and fourth embodiments of the present invention are respectively. In this embodiment, the wedge-point structure includes a plurality of the first wedge points; the first absorption slopes of the plurality of the first wedge points are connected in sequence in a wave shape. The wedge-point structures of the third and fourth embodiments include three first wedge points 100 and four first wedge points 100, respectively, and the shapes and sizes of the plurality of first wedge points 100 are the same. The plurality of first wedge points included in the wedge-point structure of the third and fourth embodiments are the structures of the second embodiment.

[0048] Of course, the multiple first wedge tips included in the wedge tip structure can be of the same shape and size, or can be composed of first wedge tips of different sizes and shapes, such as different heights from the tip side to the bottom side of the multiple first wedge tips, different angles between the two first absorption slopes, etc.

[0049] In order to increase the sound-absorbing volume and sound-absorbing bandwidth of the sound-absorbing element, thereby improving the sound-absorbing effect of the sound-absorbing element, the first wedge tip may be a multi-layer structure. Figure 5 This is a schematic structural diagram of the silencer according to the fifth embodiment of the present invention. In this embodiment, the first absorbing slope 110 and the first side surfaces 120a and 120b are a double-layer structure. The two first absorbing slopes 110 of the outer layer and the two first side surfaces 120a and 120b of the outer layer constitute an outer cavity, and the two first absorbing slopes 110 of the inner layer and the two first side surfaces 120a and 120b of the inner layer constitute an inner cavity. The outer cavity is enclosed in the inner cavity, and accordingly, holes can be set in each layer structure.

[0050] The silencer of the fourth embodiment forms a plurality of resonance chambers of different volumes. When the airflow enters the resonance chamber, the resonance chamber vibrates, so that the airflow consumes sound energy by overcoming friction resistance. Since the resonance chambers of different widths and / or heights are arranged in series, the resistance to the passage of the airflow is further increased, thereby reducing the aerodynamic noise of the high-pressure refrigerant and improving the silencer effect of the silencer.

[0051] The shapes of the holes in the above-mentioned embodiments are not limited, and may be circular, elliptical, plum blossom-shaped, polygonal, etc. The arrangement of the holes on the first absorbing slope 110 or on the first side surfaces 120a, 120b is also not limited, and may be uniformly arranged or non-uniformly arranged, such as sector layout, strip layout, etc.

[0052] The effect of sound elimination, such as the audio range of eliminated noise, can be adjusted by adjusting the size of the holes and the porosity. Preferably, the porosity set on the first absorbing slope or the first side surface is less than 10%. When the hole is circular, the diameter of the hole is defined as d, preferably, d≤1.0mm. For holes of other shapes, the size of the hole in one dimension can be less than or equal to 1.0mm.

[0053] It should be noted that the shape, size, hole position and hole ratio of the split-point structure in the silencer all have an impact on its silencer effect and can be set according to the model of the compressor actually used.

[0054] Some other embodiments of the present invention further provide a rotary compressor, which includes a plurality of the above-mentioned mufflers 100. The plurality of mufflers 100 are arranged on the inner wall of the housing 900 between the motor 700 and the upper housing cover 800 of the compressor or between the motor 700 and the upper cylinder cover (not shown in the figure). The plurality of mufflers 100 may be of the same shape and size, or may be of different shapes and sizes, which are not limited here.

[0055] Figure 6Schematic diagram of the structure of a rotary compressor according to an embodiment of the present invention, in which a plurality of mufflers are arranged on the inner wall of the housing 900 between the motor 700 and the upper housing cover 800 of the compressor. At the same time, a plurality of mufflers 100 are arranged at the same height of the compressor housing and are evenly distributed along the circumference of the inner wall of the compressor housing.

[0056] In other embodiments, a plurality of the silencers 100 may be arranged at different heights of the compressor housing to form a multi-layer structure, and distributed circumferentially along the inner wall of the compressor housing, wherein the silencers in each layer of the structure may be evenly distributed or unevenly distributed along the circumference of the inner wall of the compressor housing, which is not limited here.

[0057] The number of silencers provided in the rotor compressor of the present invention is also not limited. The size, position and number of silencers in the compressor have an impact on the final silencer effect, and in actual use, they need to be determined according to the model of the compressor actually used.

[0058] When a rotor compressor equipped with a plurality of silencers of the present invention is in operation, the airflow passes through the holes on the silencers and the cavity of the silencers. Since the aperture is relatively small, the airflow friction is very large, so that the airflow consumes sound energy by overcoming the friction resistance, thereby achieving the effect of noise reduction.

[0059] Figure 7 The figure is a comparison of the noise reduction of the rotor compressor without and with the muffler of the present invention, wherein the sound transmission loss in the rotor compressor without the muffler of the present invention is shown by the curve with ▲. It can be seen that the noise reduction effect of the rotor compressor with the muffler of the present invention on the sound of 1500Hz to 3000Hz is better than that without the muffler. Figure 7 It can be seen from the curve that the rotary compressor achieves a better silencing effect by arranging the silencing element of the present invention, thereby improving the competitiveness of the rotary compressor.

[0060] In summary, the present invention provides a muffler and a rotor compressor including the same, wherein the muffler includes at least one split tip structure; the split tip structure includes at least a first split tip; the first split tip includes two first absorption slopes and two first side surfaces; the muffler is connected to the inner wall of the compressor shell at the bottom of the first split tip; holes are provided on at least one of the first absorption slopes or the first side surfaces. When the airflow in the compressor passes through the muffler of the present invention, the holes increase the flow friction of the airflow, and the airflow pulsation is converted into heat energy. At the same time, the sound absorption frequency band can be adjusted by adjusting the hole size, hole distribution and the cavity size of the split tip structure; the muffler of the present invention can effectively reduce the high-frequency airflow pulsation in the compressor while affecting the flow resistance of the refrigerant to a lesser extent. The reduction of high-frequency airflow pulsation can effectively reduce the noise of the air conditioner outdoor unit and the noise of the air conditioner indoor unit, optimize the user experience when using the product, and improve the competitiveness of the product.

[0061] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rotary compressor, characterized in that: including multiple sound-absorbing parts; A plurality of the silencers are arranged on the inner wall of the housing between the motor and the upper housing cover or between the motor and the upper cylinder cover of the compressor; A plurality of the silencers are arranged at different heights of the compressor housing to form a multi-layer structure and are distributed circumferentially along the inner wall of the compressor housing; The muffler comprises at least one split-point structure; The split tip structure includes a plurality of first split tips; The first wedge tip includes two first absorbing inclined surfaces and two first side surfaces; The muffler is connected to the inner wall of the compressor housing at the bottom of the first split tip; At least one of the first absorbing inclined surface and the first side surface is provided with holes; The first side surface is in a wedge-shaped shape and includes two second absorption slopes; An oil drain hole is provided at the junction of the two second absorption slopes; When the hole is circular, the diameter of the hole is d, and: d≤1.0mm; The second absorption slope is provided with holes; On the surface provided with the holes, the hole ratio is less than 10%; The first absorbing inclined surfaces of the plurality of first wedge tips are connected in sequence to form a wave shape; The first cleavage tip is a multi-layer structure.

2. The rotary compressor according to claim 1, characterized in that: The holes are circular, oval, plum blossom or polygonal.

Images