Double-layer silencing cover for compressor and compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a double-layer noise reduction cover for a compressor and the compressor, the double-layer noise reduction cover for the compressor comprises a single-layer noise reduction cover, the single-layer noise reduction cover is installed on the top of a fixed disc of the compressor, and the single-layer noise reduction cover is arranged above an exhaust port of the compressor in a covering mode. A first exhaust hole is formed in the top of the single-layer silencing cover, and a plurality of silencing cavities are formed in the periphery of the single-layer silencing cover; and the composite noise reduction cover is installed on the top of a fixed disc of the compressor, the composite noise reduction cover covers the top of the single-layer noise reduction cover, and second exhaust holes are formed in the periphery of the composite noise reduction cover. According to the double-layer noise reduction cover for the compressor and the compressor, the problem that an existing single-layer noise reduction cover structure is difficult to meet the noise reduction requirement can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the compressor technical field, especially to a double-layer soundproof cover for compressor and the compressor. BACKGROUND

[0002] In recent years, with the continuous improvement of living standards, consumers' requirements for noise control of air conditioning systems are also increasingly stringent. As one of the main noise sources in air conditioning systems, the reduction of the noise level of the compressor has become a key problem for the air conditioning industry.

[0003] With the increasing demand of terminal customers for air conditioning system noise, air conditioning manufacturers are also gradually improving the noise requirements of scroll compressors. From only evaluating the OA value of single-speed noise at rated operating conditions, gradually developing to evaluating the FFT frequency spectrum without abnormal frequency sound, OA-PEAK value > 10dB(A), adjacent peak difference < 5dB(A), and no resonance noise peak point at full speed, reducing the noise of the compressor has become a hot issue in the air conditioning industry.

[0004] The single-layer soundproof cover structure commonly used in the market has good sound insulation capacity, but as the displacement of the compressor increases to 130cc, the noise reduction effect of the single-layer soundproof cover is insufficient to meet the needs of customers, and there is an urgent need to develop a soundproof structure with better noise reduction effect. CONTENT OF THE INVENTION

[0005] Therefore, the purpose of the present application is to provide a double-layer soundproof cover for compressor and a compressor to solve the problem that the existing single-layer soundproof cover structure cannot meet the noise reduction requirements.

[0006] According to the first aspect of the present application, a double-layer soundproof cover for compressor is provided, wherein the double-layer soundproof cover for compressor comprises: a single-layer soundproof cover installed on the top of the compressor's fixed disc, the single-layer soundproof cover is arranged above the exhaust port of the compressor, the top of the single-layer soundproof cover is provided with a first exhaust hole, and the outer periphery of the single-layer soundproof cover is formed with a plurality of soundproof cavities; and a composite soundproof cover installed on the top of the compressor's fixed disc, the composite soundproof cover is arranged on the top of the single-layer soundproof cover, and the outer periphery of the composite soundproof cover is provided with a second exhaust hole.

[0007] Preferably, the composite soundproof cover comprises a first metal layer, a second metal layer and a damping layer, and the damping layer is arranged between the first metal layer and the second metal layer.

[0008] Preferably, the damping layer is a vacuum structure or a damping rubber.

[0009] Preferably, the single-layer muffler comprises a first bottom disc part formed in a ring shape, which is mounted on the top of the fixed disc, and a first cover part provided on the top of the first bottom disc part, a plurality of the sound-absorbing cavities being arranged at intervals along the outer periphery of the first cover part, and a plurality of the first exhaust holes being formed in the top of the first cover part.

[0010] Preferably, the composite muffler comprises a second bottom disc part formed in a ring shape, which is sleeved outside the first bottom disc part and mounted on the top of the fixed disc, and a second cover part provided on the top of the second bottom disc part, the second cover part being sleeved outside the first cover part, a gap being arranged between the second cover part and the first cover part, and a plurality of the second exhaust holes being formed in the outer periphery of the second cover part.

[0011] Preferably, the sound-absorbing cavities are recessed towards the inside of the first cover part, and two adjacent sound-absorbing cavities form a protruding part, and a plurality of the first exhaust holes are arranged on the top of a plurality of the protruding parts, respectively.

[0012] Preferably, the number of the first exhaust holes is two, an included angle is formed between the exhaust direction of the exhaust port and the arrangement direction of the first exhaust holes relative to the exhaust port, the included angle is 90°, and at least one sound-absorbing cavity is arranged in the range of the included angle.

[0013] Preferably, the number of the second exhaust holes is two, and the two second exhaust holes are arranged on opposite sides of the second cover part, respectively.

[0014] Preferably, an arc-shaped first avoiding recess is formed on the single-layer muffler, and an arc-shaped second avoiding recess is formed on the composite muffler, the positions of the first avoiding recess and the second avoiding recess corresponding to each other.

[0015] According to the second aspect of the present application, a compressor is provided, wherein the compressor comprises the double-layer muffler for compressor as described above.

[0016] The double-layer muffler for compressor and the compressor of the present application have the single-layer muffler sleeved above the exhaust port of the compressor, and a plurality of sound-absorbing cavities are formed on the outer periphery of the single-layer muffler to preliminarily reduce noise. The composite muffler is sleeved on the top of the single-layer muffler. The composite muffler increases the resistance of sound propagation by cooperating with a plurality of material layers, and increases the acoustic impedance to further reduce noise. In this way, the problem that the existing single-layer muffler structure is difficult to meet the noise reduction requirement can be effectively solved.

[0017] In order to make the above objects, features and advantages of the present application more apparent, the following preferred embodiments will be described in detail with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 is a structural schematic diagram of a scroll compressor according to the present application.

[0020] Figure 2 is a sectional view of a composite sound shield according to the present application.

[0021] Figure 3 is a schematic diagram of a composite sound shield according to the present application.

[0022] Figure 4 is a schematic diagram of a single-layer sound shield according to the present application.

[0023] Reference signs: 1-single-layer sound shield; 11-first bottom disc part; 12-first cover body part; 120-first exhaust hole; 121-sound absorbing cavity; 122-protruding part; 123-first avoiding recess; 2-composite sound shield; 21-second bottom disc part; 22-second cover body part; 220-second exhaust hole; 221-first metal layer; 222-second metal layer; 223-damping layer; 224-second avoiding recess; 3-scroll compressor; 31-stator disc; 32-exhaust check valve assembly; 320-exhaust port; 33-suction pipe. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "communicated", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] As Figures 1 to 4 shown, according to the first aspect of the present application, a double-layer soundproof cover for a compressor is provided, which includes a single-layer soundproof cover 1 and a composite soundproof cover 2.

[0029] In the following description, reference will be made to Figures 1 to 4 The specific structure of the above components of the double-layer soundproof cover for a compressor and the connection relationship of the above components will be described in detail.

[0030] As Figures 1 to 4As shown, in this embodiment, the composite silencer 2 can cooperate with the single-layer silencer 1 to achieve gradual noise reduction. The single-layer silencer 1 can be installed on top of the stationary plate 31 of the scroll compressor 3. The single-layer silencer 1 can cover the compressor's exhaust port 320, allowing the compressed high-temperature, high-pressure airflow to enter the single-layer silencer 1 through the exhaust port 320. Multiple silencing cavities 121 are formed on the outer periphery of the single-layer silencer 1 to initially reduce noise. The composite silencer 2 is installed on top of the compressor's stationary plate 31 and covers the upper part of the single-layer silencer 1. A first exhaust port 120 is provided on the top of the single-layer silencer 1, allowing the airflow inside the single-layer silencer 1 to enter the composite silencer 2 through the first exhaust port 120. The composite silencer 2, through the interaction of multiple material layers, increases the resistance to sound propagation and enhances the acoustic impedance, thereby further reducing the noise generated by the airflow.

[0031] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the single-layer noise-absorbing cover 1 can be made of metal, and the composite noise-absorbing cover 2 can be formed into a multi-layer structure. Preferably, the composite noise-absorbing cover 2 may include a first metal layer 221, a second metal layer 222, and a damping layer 223. The damping layer 223 can be sandwiched between the first metal layer 221 and the second metal layer 222, meaning the composite noise-absorbing cover 2 is configured as a three-layer structure. This configuration greatly increases the acoustic impedance, making it difficult for noise to penetrate the composite noise-absorbing cover 2.

[0032] Furthermore, preferably, such as Figures 1 to 3 As shown, in this embodiment, the first metal layer 221 and the second metal layer 222 can be integrally formed. That is, the first metal layer 221 and the second metal layer 222 are connected as a whole, and the damping layer 223 is surrounded therein. The damping layer 223 can be a vacuum structure or damping rubber, which can effectively reduce the propagation of noise.

[0033] Preferred, such as Figure 1 and Figure 4 As shown, in this embodiment, the single-layer silencer 1 may include a first chassis portion 11 and a first cover portion 12. The first chassis portion 11 may be annular. The first chassis portion 11 can be bolted to the top of the fixed plate 31 and encloses the exhaust check valve assembly 32 of the scroll compressor 3 within it. The first cover portion 12 is disposed on top of the first chassis portion 11, and the first cover portion 12 is integrally formed with the first chassis portion 11. Multiple silencer cavities 121 may be spaced apart along the outer periphery of the first cover portion 12, such that the airflow discharged from the exhaust port 320 must pass through multiple silencer cavities 121 sequentially when flowing circumferentially along the first cover portion 12. Multiple first exhaust holes 120 are formed on the top of the first cover portion 12 to allow airflow to exit from within the first cover portion 12.

[0034] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the composite noise-reducing cover 2 may include a second chassis portion 21 and a second cover portion 22. The second chassis portion 21 may be annular. The second chassis portion 21 can be bolted to the top of the fixed plate 31 and fitted over the outside of the first chassis portion 11. The second cover portion 22 is disposed on top of the second chassis portion 21 and is integrally formed with the second chassis portion 21. The second cover portion 22 covers the outside of the first cover portion 12, and a gap is provided between the second cover portion 22 and the first cover portion 12, allowing airflow exiting from the first cover portion 12 to flow within the second cover portion 22. Multiple second exhaust holes 220 may be formed on the outer periphery of the second cover portion 22. The position of the second exhaust holes 220 may be lower than the position of the first exhaust holes 120, requiring the airflow within the second cover portion 22 to flow around to the second exhaust holes 220 for discharge, thereby further reducing noise generated by the airflow.

[0035] Furthermore, preferably, such as Figure 1 and Figure 4 As shown, in this embodiment, the silencing cavity 121 is formed on the outer periphery of the first cover portion 12 and recessed into the interior of the first cover portion 12. A protrusion 122 can be sandwiched between two adjacent silencing cavities 121. The silencing cavity 121 can be an arc-shaped recess, and multiple silencing cavities 121 can be formed at intervals on the outer periphery of the first cover portion 12, so that the projection of the first cover portion 12 on the horizontal plane forms a petal shape. The airflow discharged from the exhaust port 320 flows along the inner wall of the first cover portion 12. When passing through the silencing cavity 121, the silencing cavity 121 can reduce the pulsation and velocity of the airflow, thereby reducing aerodynamic noise. Multiple first exhaust holes 120 are respectively disposed on the top of multiple protrusions 122, and the airflow is finally discharged through the first exhaust holes 120.

[0036] Further optimized, such as Figure 1 and Figure 4As shown, in this embodiment, there can be two first exhaust holes 120, which can be respectively disposed on opposite sides of the first cover portion 12. The exhaust direction of the exhaust port 320 can form an angle with the arrangement direction of the first exhaust hole 120 relative to the exhaust port 320 (i.e., the direction of the line connecting the projection of the first exhaust hole 120 on the upper surface of the fixed plate 31 and the exhaust port 320), the angle being 90°, and at least one silencing cavity 121 is provided within the range of the angle to ensure that the airflow passes through at least one silencing cavity 121 during the flow from the exhaust port 320 to the first exhaust hole 120. Similarly, there can also be two second exhaust holes 220, which can be respectively disposed on opposite sides of the second cover portion 22. The two second exhaust holes 220 can be arranged corresponding to the positions of the two first exhaust holes 120 to accelerate the airflow discharge from the second cover portion 22.

[0037] Preferred, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, an arc-shaped first clearance recess 123 may be formed on the single-layer silencer 1, while an arc-shaped second clearance recess 224 may be formed on the composite silencer 2. The first clearance recess 123 and the second clearance recess 224 are positioned correspondingly to avoid interference between the single-layer silencer 1 or the composite silencer 2 and the suction pipe 33 of the scroll compressor 3.

[0038] In addition, such as Figure 1 As shown, according to a second aspect of this utility model, a compressor is provided, the compressor including the double-layer silencer cover for the compressor as described above. The compressor can be a scroll compressor 3. The double-layer silencer cover for the compressor can be fixed to the top of the fixed plate 31 by bolts, and the exhaust check valve assembly 32 is covered inside the exhaust silencer cover. The airflow discharged from the exhaust port 320 first enters the single-layer silencer cover 1, flows through multiple silencer chambers 121, and finally exits through the first exhaust port 120 into the composite silencer cover 2, and finally exits through the second exhaust port 220 into the upper housing of the compressor.

[0039] During use, the double-layer soundproof cover for the compressor can significantly reduce the exhaust pulsation noise, the exhaust valve piece mechanical action noise, and the sound pressure level noise in the surrounding area of the compressor, and reduce the noise interference on the user and the surrounding residents. The double-layer soundproof cover for the compressor can be customized and installed according to the requirements, tightly wrap the noise source, and maximize the control of the noise diffusion to the outside. During use, the double-layer soundproof cover for the compressor can reduce the total value of the compressor noise by 6dB(A) to 9dB(A), effectively reduce the exhaust noise in the frequency band of 2500 to 3200Hz, and cut the peak value, with the adjacent noise peak value difference less than 5dB(A), thereby meeting the noise reduction requirements.

[0040] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited to this. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features within the technical range disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A double-layer noise muffler for a compressor, disposed on the compressor, characterized in that the double-layer noise muffler for the compressor comprises: A single-layer silencer is installed on top of the compressor's stator, covering the compressor's exhaust port. The top of the silencer has a first exhaust port, and the outer periphery of the silencer forms multiple silencer chambers. A composite silencer is installed on top of the compressor's stator, covering the top of the single-layer silencer, and a second exhaust port is provided on the outer periphery of the composite silencer.

2. The double-layer silencer cover for a compressor according to claim 1, characterized in that, The composite noise-absorbing cover includes a first metal layer, a second metal layer, and a damping layer, with the damping layer sandwiched between the first metal layer and the second metal layer.

3. The double-layer silencer cover for a compressor according to claim 2, characterized in that, The damping layer is a vacuum structure or damping rubber.

4. The double-layer silencer cover for a compressor according to claim 1, characterized in that, The single-layer sound-absorbing cover includes: A first chassis portion, formed in a ring shape, is mounted on top of the fixed plate; and The first cover is disposed on the top of the first chassis, and a plurality of the silencing cavities are disposed at intervals along the outer periphery of the first cover, and a plurality of the first exhaust holes are opened on the top of the first cover.

5. The double-layer silencer cover for a compressor according to claim 4, characterized in that, The composite noise-absorbing cover includes: The second chassis portion is formed in a ring shape, and is fitted over the outside of the first chassis portion, with the second chassis portion mounted on top of the fixed plate; and The second cover is disposed on the top of the second chassis portion. The second cover covers the outside of the first cover portion. A gap is provided between the second cover portion and the first cover portion. A plurality of second exhaust holes are opened on the outer periphery of the second cover portion.

6. The double-layer silencer cover for a compressor according to claim 4, characterized in that, The silencing cavity is recessed into the interior of the first cover portion, and a protrusion is formed between two adjacent silencing cavities. A plurality of first exhaust holes are respectively disposed on the top of the plurality of protrusions.

7. The double-layer silencer cover for a compressor according to claim 6, characterized in that, The number of the first exhaust holes is two, and the exhaust direction of the exhaust port forms an angle of 90° with the setting direction of the first exhaust hole relative to the exhaust port. At least one of the silencers is provided within the range of the angle.

8. The double-layer silencer cover for a compressor according to claim 5, characterized in that, There are two second exhaust holes, which are respectively located on opposite sides of the second cover.

9. The double-layer silencer cover for a compressor according to claim 1, characterized in that, An arc-shaped first clearance recess is formed on the single-layer soundproof cover, and an arc-shaped second clearance recess is formed on the composite soundproof cover, with the positions of the first clearance recess and the second clearance recess corresponding to each other.

10. A compressor, characterized in that, The compressor includes a double-layered soundproof cover for the compressor according to any one of claims 1 to 9.

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