Muffler and rotor compressor including the same

Abstract

The present invention provides a muffler and a rotor compressor including the same, wherein the muffler is a double-layer structure, including an outer muffler and an inner muffler; the outer muffler includes a first base and a boss connected to the first base, the boss includes a first side wall protruding upward relative to the first base and a first top wall connected to the first side wall, the first top wall is provided with a first axial hole, when the outer muffler is sleeved on the compressor crankshaft through the first axial hole, and connected to the upper cylinder head or lower cylinder head of the compressor through the first base, the outer muffler, the upper cylinder head or lower cylinder head and the crankshaft enclose a muffler cavity connected to the compressor exhaust passage; the inner muffler is arranged in the muffler cavity; the inner muffler is provided with a plurality of holes. The muffler of the present invention has a double-layer structure, and the inner muffler is provided with holes, which can effectively reduce the medium and high frequency airflow pulsation in the compressor, reduce the pneumatic noise of the high pressure refrigerant, and improve the muffler effect.

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 same. Background Art

[0002] Airflow noise is an important source of noise in air conditioner rotor compressors, and it can cause noise in the air conditioner unit, reducing user experience and the competitiveness of air conditioner products. In order to reduce airflow noise, a muffler is usually installed in the compressor.

[0003] At present, single-layer silencers or double-layer silencers have been used. During the silencer process, the valve plate opens periodically, and the refrigerant is discharged and flows into the cavity surrounded by the silencer and the upper cylinder head. If it is a double-layer silencer, the refrigerant will pass through the cavity of the inner silencer and the outer silencer for a second silencer. The existing double-layer silencer has a better silencer effect than the single-layer silencer, but the silencer effect in the medium and high frequency bands is still poor. How to reduce the airflow noise inside the compressor has always been a research topic in the field of compressor technology.

[0004] 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

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a muffler and a rotor compressor including the same. The muffler of the present invention has a double-layer structure, and the inner muffler is provided with a plurality of holes, which can effectively reduce the medium and high frequency air flow pulsation in the compressor, reduce the pneumatic noise of the high-pressure refrigerant, and improve the muffler effect.

[0006] Some embodiments of the present invention provide a muffler, wherein the muffler is a double-layer structure, including an outer muffler and an inner muffler;

[0007] The outer silencer comprises a first base and a boss connected to the first base, the boss comprises a first side wall protruding upward relative to the first base and a first top wall connected to the first side wall, the first top wall is provided with a first axial hole, when the outer silencer is sleeved on the crankshaft of the compressor through the first axial hole, and is connected to the upper cylinder head or the lower cylinder head of the compressor through the first base, the outer silencer, the upper cylinder head or the lower cylinder head and the crankshaft enclose a silencer cavity connected to the exhaust passage of the compressor;

[0008] The inner layer silencer is arranged in the silencer cavity;

[0009] The inner layer sound-absorbing member is provided with a plurality of holes.

[0010] According to some examples of the present invention, the inner muffler includes a second side wall, and the second side wall surrounds the crankshaft.

[0011] According to some examples of the present invention, a projection of the second side wall on a plane perpendicular to the crankshaft is wavy.

[0012] According to some examples of the present invention, heights of the second side wall and the first side wall along the crankshaft direction are h and H respectively, and Hh≤1.0 mm.

[0013] According to some examples of the present invention, the inner layer silencer further includes a second top wall connected to the second side wall, and the second top wall is provided with a second shaft hole through which the crankshaft passes.

[0014] According to some examples of the present invention, the hole is disposed on the second side wall or the second top wall.

[0015] According to some examples of the present invention, the diameter of the hole is d, and 0.2mm≤d≤1.0mm.

[0016] According to some examples of the present invention, on the surface provided with the holes, the hole rate is between 1% and 10%.

[0017] Some other embodiments of the present invention further provide a rotor compressor including the above-mentioned muffler.

[0018] According to some examples of the present invention, the first base of the muffler is connected to an upper cylinder head of the compressor or to a lower cylinder head of the compressor.

[0019] The silencer of the present invention has a double-layer structure, forming resonance cavities of different widths and / or heights arranged in series, and the inner silencer is provided with holes. When the air in the compressor flows through the silencer, the series arrangement of the resonance cavities and the hole arrangement of the inner silencer both increase the friction resistance of the airflow passing through, thereby consuming sound energy. The silencer of the present invention effectively reduces the medium and high frequency airflow pulsation in the compressor, reduces the aerodynamic noise of the high-pressure refrigerant, and improves the silencer effect of the silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 A schematic structural diagram of a muffler according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of an inner layer sound-absorbing component according to an embodiment of the present invention;

[0023] Figure 3 A side view of an inner layer sound-absorbing member according to another embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of an inner layer sound-absorbing member according to another embodiment of the present invention;

[0025] Figure 5 It is a noise reduction comparison diagram of a rotor compressor without and with the silencer of the present invention.

[0026] Reference numerals

[0027] 100 Outer silencer

[0028] 110 First Base

[0029] 120 Boss

[0030] 121 First side wall

[0031] 122 First top wall

[0032] 123 First axis hole

[0033] 200 Inner silencer

[0034] 210 Second side wall

[0035] 220 Second top wall

[0036] 230 Second Base

[0037] 221 Second axis hole

[0038] 290 Holes DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In order to solve the problems in the prior art, some embodiments of the present invention provide a muffler. Figure 1 The figure is a schematic structural diagram of a muffler according to an embodiment of the present invention.

[0044] Specifically, the muffler is a double-layer structure, including an outer muffler 100 and an inner muffler 200;

[0045] The outer silencer 100 includes a first base 110 and a boss 120 connected to the first base, the boss 120 includes a first side wall 121 protruding upward relative to the first base and a first top wall 122 connected to the first side wall 121, the first top wall 122 is provided with a first axial hole 123, when the outer silencer 100 is sleeved on the compressor crankshaft through the first axial hole 123, and is connected to the upper cylinder head of the compressor through the first base 110, the outer silencer 100, the upper cylinder head and the crankshaft enclose a silencer cavity connected to the exhaust passage of the compressor;

[0046] The inner layer silencer 200 is arranged in the silencer cavity; the inner layer silencer 200 arranged in the inner cavity of the outer layer silencer divides the silencer cavity into a plurality of resonance cavities.

[0047] The inner layer sound-absorbing member 200 is provided with a plurality of holes 290

[0048] It should be pointed out that the above description takes the case where the muffler is disposed on the upper cylinder head of the compressor as an example. Similarly, the muffler of the present invention can also be disposed on the lower cylinder head, that is, when the outer muffler 100 is sleeved on the compressor crankshaft through the first shaft hole 123 and connected to the lower cylinder head of the compressor through the first base 110, the outer muffler 100, the lower cylinder head of the compressor and the crankshaft enclose a muffler cavity connected to the exhaust passage of the compressor.

[0049] The silencer of the present invention has a double-layer structure of an outer silencer 100 and an inner silencer 200, forming resonance cavities of different widths and / or heights arranged in series, and the inner silencer 200 is provided with a hole 290. When the air in the compressor flows through the silencer, the series arrangement of the resonance cavities and the hole arrangement of the inner silencer both increase the friction resistance of the airflow when it passes through, thereby consuming sound energy, thereby reducing the aerodynamic noise of the high-pressure refrigerant and enhancing the silencer effect.

[0050] Figure 2 This is a schematic structural diagram of an inner silencer according to an embodiment of the present invention, wherein the inner silencer 200 includes a second side wall 210, and the second side wall 210 surrounds the crankshaft; the inner silencer 200 also includes a second top wall 220 connected to the second side wall 210, and the second top wall 220 is provided with a second axial hole 221 through which the crankshaft is passed.

[0051] The inner silencer 200 of the above embodiment can be directly connected to the upper cylinder head or the lower cylinder head of the compressor through the second side wall 210, or an extended second base 230 can be provided on the outer periphery of the second side wall 210, and the second side wall 210 protrudes upward relative to the second base 230. The inner silencer 200 can be fixedly connected to the upper cylinder head or the lower cylinder head of the compressor through the second base 230.

[0052] In some other embodiments, the inner silencer 200 may include the second side wall 210 surrounding the crankshaft of the compressor, that is, the second top wall 220 connected to the second side wall 210 is not provided. Similarly, the second side wall 210 provided in the outer silencer 100 may divide the silencer cavity into a plurality of resonance cavities, so that the airflow passing therethrough oscillates multiple times, thereby reducing the airflow sound energy and reducing the noise. Of course, in this embodiment, an extended second base 230 may also be provided on the periphery of the second side wall 210 to facilitate the fixed installation of the inner silencer 200 and the upper cylinder head or lower cylinder head of the compressor.

[0053] Furthermore, in some embodiments, the projection of the second side wall 210 on a plane perpendicular to the crankshaft is wavy. The side view of the inner layer silencer of one embodiment is as follows: Figure 3The second side wall 210 is wavy. The inner layer silencer 200 may be provided with only the second side wall 210, or may be provided with the second side wall 210 and the second top wall 220 at the same time. In this case, the second top wall 220 is no longer Figure 2 The second side wall 210 is not in a planar shape as in the embodiment, but in a wavy shape that matches the shape of the second side wall 210 .

[0054] In the embodiment where the inner layer sound-absorbing member 200 includes a second side wall 210 and a second top wall 220 connected thereto, the hole 290 may be disposed on the second side wall 210 or on the second top wall 220 .

[0055] In the embodiment where the inner sound-absorbing member 200 only includes the second side wall 210 , the hole 290 may be disposed on the second side wall 210 .

[0056] The shapes of the holes 290 in the above-mentioned embodiments are not limited, and may be circular, elliptical, polygonal, etc. The arrangement of the holes 290 on the second side wall 210 or the second top wall 220 is also not limited, and may be arranged uniformly or non-uniformly. Figure 2 or Figure 3 In the embodiment of the present invention, the holes 290 are circular and evenly distributed along the circumference of the second shaft hole 221 .

[0057] The inner layer sound-absorbing member 200 may also be Figure 4 As shown, in this embodiment, the holes 290 provided on the second top wall 220 are evenly distributed along the circumference of the second axial hole 221, and the second top wall 220 is also provided with an arc-shaped protrusion along the hole 290. The arc-shaped protrusion increases the area of ​​the second top wall 220, that is, increases the contact area with the passing airflow, thereby further increasing the friction resistance when the airflow passes through, thereby consuming sound energy, achieving the effect of reducing the aerodynamic noise of the high-pressure refrigerant, thereby enhancing the silencing effect.

[0058] The effect of sound elimination can be adjusted by adjusting the size of the holes and the hole ratio, such as the audio range of the eliminated noise. Preferably, the hole ratio set on the second side wall 210 or the second top wall 220 is between 1% and 10%. When the hole 290 is circular, the diameter of the hole is defined as d, preferably, 0.2mm≤d≤1.0mm. For holes of other shapes, the size of the hole in one dimension direction can be within the above range.

[0059] The outer silencer 100 and the inner silencer 200 of the silencer of the present invention can be adjusted according to the model of the compressor to which they are actually applied. Silencers of different sizes are used for compressors of different models. Even if the compressor is of the same model, when the outer silencer 100 and the inner silencer 200 of different sizes are configured, the silencing effect is also different. The thickness of each component of the outer silencer 100 and the inner silencer 200, such as the first side wall 121, the first top wall 122, the second side wall 210 and the second top wall 220, can be less than 2.0 mm.

[0060] Preferably, when the inner silencer 200 only includes the second side wall 210, the height difference between the inner silencer 200 and the outer silencer 100 should be less than 1 mm; when the inner silencer includes the second side wall 210 and the second top wall 220, the height difference is between 5% and 80% of the overall height.

[0061] Preferably, in some embodiments, a width difference between the second side wall 210 and the first side wall 110 along the circumferential direction of the crankshaft may be between 5 mm and 50 mm.

[0062] Some other embodiments of the present invention further provide a rotor compressor including the above-mentioned muffler.

[0063] The first base of the muffler is connected to the upper cylinder head of the compressor or the lower cylinder head of the compressor. The fixed connection between the muffler and the upper cylinder head or the lower cylinder head of the compressor can be achieved by welding or bolts. The dimensions of the outer layer muffler and the inner layer muffler of the muffler provided in the rotary compressor of the present invention, and the size ratio between the two can be set according to actual use conditions.

[0064] Since the silencer of the present invention has a double-layer structure, compared with a single-layer structure, the inner cavity of the double-layer silencer forms a plurality of resonance cavities of different volumes. When the airflow enters the resonance cavity, the resonance cavity will vibrate, thereby causing the airflow to consume sound energy by overcoming friction resistance. The holes provided in the inner silencer further increase the resistance to the passage of the airflow, thereby reducing the aerodynamic noise of the high-pressure refrigerant and improving the silencer effect of the silencer. Figure 5 This is a comparison diagram of the noise reduction of a rotor compressor without and with the muffler of the present invention, wherein: Figure 5 The solid line represents the sound transmission loss in the rotary compressor without the muffler of the present invention. Figure 5 The dotted line is the sound transmission loss in the rotor compressor equipped with the silencer of the present invention. It can be seen that the noise reduction effect of the rotor compressor equipped with the silencer of the present invention in the frequency domain of 2500Hz to 2700Hz is improved to varying degrees, and the noise reduction effect is better than that of the compressor not equipped with the silencer of the present invention. Figure 5The curve proves that the rotary compressor can achieve better silencing effect by setting the silencer of the present invention.

[0065] In summary, the present invention provides a silencer and a rotor-type compressor including the same, wherein the silencer is a double-layer structure, including an outer silencer and an inner silencer; the outer silencer includes a first base and a boss connected to the first base, the boss includes a first side wall protruding upward relative to the first base and a first top wall connected to the first side wall, the first top wall is provided with a first axial hole, when the outer silencer is sleeved on the compressor crankshaft through the first axial hole, and is connected to the upper cylinder head or the lower cylinder head of the compressor through the first base, the outer silencer, the upper cylinder head or the lower cylinder head and the crankshaft enclose a silencer cavity connected to the exhaust channel of the compressor; the inner silencer is arranged in the silencer cavity; the inner silencer is provided with holes.

[0066] The silencer of the present invention has a double-layer structure, forming resonance cavities of different widths and / or heights arranged in series, and the inner silencer is provided with holes. When the air in the compressor flows through the silencer, the series arrangement of the resonance cavities and the hole arrangement of the inner silencer both increase the friction resistance of the airflow passing through, thereby consuming sound energy. The silencer of the present invention effectively reduces the medium and high frequency airflow pulsation in the compressor, reduces the aerodynamic noise of the high-pressure refrigerant, and improves the silencer effect of the silencer.

[0067] 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 muffler, characterized in that: The silencer is a double-layer structure, including an outer silencer and an inner silencer; The outer silencer comprises a first base and a boss connected to the first base, the boss comprises a first side wall protruding upward relative to the first base and a first top wall connected to the first side wall, the first top wall is provided with a first axial hole, when the outer silencer is sleeved on the crankshaft of the compressor through the first axial hole, and is connected to the upper cylinder head or the lower cylinder head of the compressor through the first base, the outer silencer, the upper cylinder head or the lower cylinder head and the crankshaft enclose a silencer cavity connected to the exhaust passage of the compressor; The inner layer silencer is arranged in the silencer cavity; The inner layer sound-absorbing member is provided with a plurality of holes; The inner silencer only includes a second side wall, the second side wall surrounds the crankshaft, the inner silencer is not provided with a second top wall connected to the second side wall, and the hole is provided in the second side wall; the hole rate is between 1% and 10%; The projection of the second side wall on a plane perpendicular to the crankshaft is wavy; The heights of the second side wall and the first side wall along the crankshaft direction are h and H respectively, and Hh≤1.0mm.

2. The muffler according to claim 1, characterized in that: The diameter of the hole is d, and satisfies: 0.2mm≤d≤1.0mm.

3. A rotary compressor, characterized in that: The invention comprises the silencer as claimed in claim 1 or 2.

4. The rotary compressor according to claim 3, characterized in that: The first base of the muffler is connected to the upper cylinder head of the compressor or the lower cylinder head of the compressor.

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