WO2018126611A1 - Compressor - Google Patents

Abstract

A compressor comprises: a base (400); a housing (500); a compression assembly (300); and a sound insulation assembly (100). The sound insulation assembly (100) is provided at a surface of at least one of the base (400) and the housing (500). The sound insulation assembly (100) comprises: a superimposition layer (110) comprising a foam sublayer (11) and a non-foam sublayer (12); and a sound-absorbing layer (120) provided at a lower surface of the superimposition layer (110).

Description

compressor

Priority information

The present application claims priority to and the benefit of the patent application Serial No. PCT Application No.

Technical field

The present invention relates to the field of noise control and, in particular, to a compressor.

Background technique

As noise pollution becomes more and more serious, the impact of noise pollution on the environment, especially on human health, has drawn the attention of all sectors of society. The prevention and control of noise pollution has become a major issue that needs to be solved urgently at present. Controlling noise pollution mainly includes: control of the sound source, and restriction of noise propagation. Specific to the field of home appliances, household appliances (including but not limited to household air conditioners, central air conditioners, wall breaking machines, air energy water heaters, etc.) generally have compressors, hot water pumps, high-speed motors and other components, and the above structures will generate a lot of noise indoors. It seriously affects the quality of life of the people. However, the above-mentioned home appliances require components such as compressors to realize their functions of use, so that people are more convenient in using the above-mentioned home appliances, and also bring noisy noise. Therefore, the noise source in the environment is currently not removable, so the control of the noise propagation path is mainly adopted to reduce the harm of noise to the user.

However, current soundproofing components and compressors with noise reduction have yet to be improved.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

The present invention has been completed based on the following findings of the inventors:

Since the amount of noise emitted by the noise source of the compressor has been reduced to the limit, it is difficult to achieve a large noise reduction effect from the improvement of the fluid and mechanical structure. Moreover, changing the mechanical structure of the compressor may also cause a lot of uncertain factors. Therefore, the current research on noise reduction of the compressor is mostly concentrated on the installation of the soundproof component or the soundproof component of the compressor. At present, noise-reducing materials generally have problems such as poor durability and unsatisfactory sound insulation. The inventors have conducted in-depth research and a large number of experiments and found that this is mainly due to the fact that in order to reduce the overall weight of the device, current outdoor units, compressors, etc., are often provided with sound-absorbing components such as sound-absorbing cotton at noise sources (such as compressor casings, etc.). Most of the sound-absorbing cotton is a sound-absorbing felt and polyester cotton which are pressed by recycled cotton, and the sound absorption effect is poor. At present, the sound absorption effect can be improved by coating the outer surface of the sound absorbing cotton with a PVC skin. According to the quality law of sound insulation: the heavier the sound insulation component (the density of the surface, or the greater the mass per unit area), the better the sound insulation effect, and the double the surface density, the theoretical increase of the sound insulation is 6dB. Therefore, an increase in the amount of sound insulation can be obtained by increasing the number of layers or the thickness of the sound insulating member. However, the PVC skin is mostly a single-layer laminated PVC artificial leather, in order to achieve low cost and good sound insulation effect, the pursuit of higher areal density, in the PVC processing process, a large amount of CaCO ₃ , BaSO ₄ is added to the PVC. , metal powder and other fillers. However, the PVC material added with the above filler is not resistant to aging, and the filler PVC material may be pulverized and broken during long-term use, thereby reducing the sound insulation effect and durability of the soundproof assembly. Moreover, increasing the material thickness or the areal density (adding the filler) will make the material hard. Therefore, when the noise-insulating component is coated with the noise vibration source, the contact portion around the sound-insulating component may be caused by the vibration, causing resonance, and thus a second time. noise.

In view of this, in the first aspect of the invention, the invention proposes a compressor. The compressor includes: a base; a compressor housing, the compressor housing is disposed on the base; a compression assembly, the compression assembly is disposed inside the compressor housing; and a soundproof assembly, the soundproof assembly Provided on a surface of at least one of the base and the compressor housing, wherein the soundproof assembly includes: a laminated layer including a foamed sub-layer and a non-foamed sub-layer; and a sound absorbing layer, A sound absorbing layer is disposed on a lower surface of the laminated layer. The sound-insulating component utilizes a continuous layered interface formed by alternating layers of a foamed layer and a non-foamed layer of the laminated layer to achieve multiple reflection of noise, the foamed layer reduces the density of the sound-insulating component, and the sound of the adjacent two-layer laminated layer The anti-ratio is not matched, so that the effective reflection of the acoustic wave by the layered interface can be improved, and the acoustic energy can be attenuated, and the high-frequency and low-frequency noise can not easily penetrate the sound-insulating component. Moreover, since the sound insulating component has a foamed sub-layer and a non-foamed sub-layer, the density of the material can be reduced, thereby facilitating the overall hardness of the sound-insulating component (the Shore hardness can be close to 75 A), and the sound-insulating component is covered. On the material to be noise-reduced, the contradiction between high sound insulation and material density reduction is solved.

According to an embodiment of the present invention, the foamed sublayer and the non-foamed sublayer in the layered layer are alternately stacked. Thereby, the reflection effect on noise can be further improved.

According to an embodiment of the present invention, the layer stack includes at least one of PVC, PU, fluororubber, butadiene rubber, and styrene-butadiene rubber. Thereby, the performance of the soundproof assembly can be further improved.

According to an embodiment of the invention, the laminate layer is formed of PVC. Thereby, the performance of the soundproof assembly can be further improved.

According to an embodiment of the invention, the layer stack is formed by a micro-nano lamination technique. Thereby, the laminated layer can be obtained easily.

According to an embodiment of the present invention, the foamed sub-layer and the non-foamed sub-layer are formed by the same material, after being foamed or not subjected to a foaming treatment.

According to an embodiment of the invention, the layered layer has a density of 1.0 to 1.79 g/cm ³ . The laminate layer according to an embodiment of the present invention may have a smaller density and the material texture may be made softer than a conventional PVC material to which a metal powder or an inorganic filler is added. According to an embodiment of the invention, the sound absorbing layer comprises at least one of a damping glue, a polyester cotton, and a sound absorbing felt. Thereby, the performance of the soundproof assembly can be further improved.

According to an embodiment of the present invention, a plurality of the layered layers and a plurality of the sound absorbing layers are included, and the layered layer and the sound absorbing layer are alternately stacked. Thereby, the performance of the soundproof assembly can be further improved.

According to an embodiment of the invention, the laminate layer has a thickness of 0.2 to 3 mm.

According to an embodiment of the invention, the layered layer has a thickness of from 0.5 to 2.5 mm.

According to an embodiment of the invention, the sound absorbing layer has a thickness of from 1 to 6 mm. Thereby, the noise reduction effect of the soundproof assembly can be further improved.

According to an embodiment of the invention, the sound absorbing layer has a thickness of 4-6 mm.

According to an embodiment of the invention, the compressor further includes: an intake line and an exhaust line, the suction line and the exhaust line being respectively connected to the compression assembly, the suction line And a surface of at least one of the exhaust lines has a vibration confinement material. Thereby, the noise caused by the vibration of the pipe can be reduced by the vibration restraining material, so that the noise reduction capability of the compressor can be further improved.

According to an embodiment of the invention, the vibration restraining material comprises at least one of silicone rubber and damping rubber, butyl cyanide rubber, ethylene propylene rubber, and butyl cyanide rubber. Thereby, the ability of the vibration-constrained material to isolate the vibration-induced noise can be further improved.

According to an embodiment of the invention, the vibration-confining material has a plurality of sub-layers stacked in sequence.

According to an embodiment of the invention, the compressor is a high speed compressor.

DRAWINGS

Figure 1 shows a schematic structural view of a compressor according to an embodiment of the present invention;

2 is a schematic structural view of a soundproof assembly according to an embodiment of the present invention;

Figure 3 shows a schematic structural view of a laminate layer in accordance with one embodiment of the present invention;

4 is a schematic structural view of a soundproof assembly according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the principle of noise reduction according to an embodiment of the present invention; FIG.

6 shows a schematic diagram of a noise reduction principle according to an embodiment of the present invention;

Fig. 7 shows the results of the anti-noise test according to Embodiment 1 of the present invention.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In a first aspect of the invention, the invention proposes a compressor. According to an embodiment of the present invention, referring to FIG. 1, the compressor 1000 includes a soundproof assembly 100, a compression assembly 300, a base 400, and a compressor housing 500. The compressor housing 500 is disposed on the base 400, and the compression assembly 300 is disposed inside the compressor housing 500. On the surface of at least one of the base 400 and the compressor housing 500, a soundproof assembly 100 is disposed. The compressor has at least one of the following advantages: light weight, good sound insulation, and high durability of the soundproofing assembly.

According to an embodiment of the present invention, referring to FIG. 2, the soundproof assembly 100 includes a laminate layer 110 and a sound absorbing layer 120. The sound absorbing layer 120 is disposed on the lower surface of the layer stack 110. Referring to FIG. 2, the layer stack 110 includes a foamed sub-layer 11 and a non-foamed sub-layer 12. The sound insulating unit utilizes a continuous layered interface formed by alternately forming a foamed sub-layer 11 and a non-foamed sub-layer 12 of the laminated layer 110 to achieve multiple reflection of noise. The foamed sub-layer 11 reduces the density of the sound-insulating component 100 and increases the acoustic-impedance ratio between the layers, thereby improving the effective reflection of the sound waves by the layered interface and realizing the attenuation of the acoustic energy, so that the high-frequency noise does not easily penetrate the sound-insulating component 100. . Moreover, since the soundproofing component 100 has the foamed sub-layer 11 and the non-foamed sub-layer 12, the density of the material can be reduced, thereby facilitating obtaining high hardness and facilitating the covering of the sound-insulating component 100 onto the material to be noise-reduced. The contradiction between high sound insulation and reduced material density.

It should be noted that the specific material and preparation manner of the layered layer 110 and the sound absorbing layer 120 are not particularly limited, and those skilled in the art can select according to actual conditions. As long as the soundproofing component can realize the characteristics of acoustic impedance mismatch in the laminated layer 110, it is possible to realize multiple reflection of noise. In order to facilitate understanding, the following is a brief description of the principle of noise reduction and sound insulation for the soundproofing component:

As mentioned earlier, the amount of sound insulation of the soundproofing component is related to the areal density of the material. The laminated layer 110 is formed of a foamed sub-layer 11 and a non-foamed sub-layer 12, and the foamed sub-layer 11 and the non-foamed sub-layer 12 have different areal densities. The foamed sub-layer 11 and the non-foamed sub-layer 12 may be formed of two different polymer materials or may be formed of the same polymer material: for the same polymer material, after being foamed (for foaming) Sublayer 11) or without foaming treatment (non-foamed sub-layer 12), a laminated foamed sub-layer and a non-foamed sub-layer are formed by a micro-nano lamination technique. At least one continuous layered interface exists in the layer stack 110, that is, an acoustic impedance mismatch characteristic is formed in the layer stack. Therefore, after the noise is incident on the side of the layer stack 110, multiple reflections occur in the layer stack 110, so that the energy of the noise emitted from the other side of the layer stack can be reduced to achieve the purpose of reducing the transmitted sound energy by reflection. . The special viscoelasticity, high damping and light weight of the polymer material can reduce the transmission acoustic energy while reducing the quality of the soundproof component. At the same time, since the laminated layer does not rely on the introduction of the filler to achieve the noise reduction function, the soundproof component is In actual use, defects such as cracks and cracks are not formed at the filler due to vibration, material aging and the like, and the durability of the soundproof assembly is affected. The sound absorbing layer 120 has the function of absorbing sound energy and dissipating sound energy, so that the purpose of reducing the transmitted sound energy by absorbing the sound energy can be achieved. According to an embodiment of the present invention, the sound absorbing layer 120 may have a porous structure. Thus, according to the sound insulating assembly of the embodiment of the present invention, a better sound insulating effect can be achieved without increasing the overall density of the material. Moreover, the soundproofing component does not involve a metal filler harmful to the human body, and thus is more suitable for noise reduction and sound insulation in the field of home appliances. In addition, the sound-insulating assembly according to the embodiment of the present invention does not have high-density, heavy-mass filler doping, so that the doping filler is not dropped due to external environment such as vibration during use, and thus has better durability. .

In addition, the inventors have unexpectedly discovered that the soundproofing assembly uses a combination of sound absorbing (sound absorbing layer 120) and damped noise reduction (layering layer 110), which can significantly reduce low frequency noise, and is more suitable for noise reduction of home appliance compressors. Moreover, the sound insulating member can be adjusted by adjusting the areal density of the foamed sub-layer 11 and the non-foamed sub-layer 12 in the laminated layer 110. Low noise in different frequency bands, so it can be applied to noise reduction processing of different noise spectrum.

According to an embodiment of the present invention, the foamed sub-layer 11 and the non-foamed sub-layer 12 in the layered layer 110 may be alternately stacked. Thereby, the reflection effect on noise can be further improved. The laminate layer may be formed of at least one of PVC, PU, fluororubber, butadiene rubber, and styrene-butadiene rubber. Thereby, the performance of the soundproof assembly can be further improved. As described above, the foamed sub-layer 11 and the non-foamed sub-layer 12 in the layered layer 110 may be formed of the same material or may be formed of different materials. The thickness of the foamed sub-layer 11 and the non-foamed sub-layer 12 is also not particularly limited. For example, according to a specific embodiment of the present invention, the foamed sub-layer 11 and the non-foamed sub-layer 12 may be set to have a thickness of micrometers. Even the nano level. In accordance with a particular embodiment of the invention, the layer stack 110 can be prepared using micro-nano lamination techniques. Thereby, the foamed sub-layer 11 and the non-foamed sub-layer 12 having a thickness of the micro-nano level can be easily obtained. As described above, the soundproofing assembly according to the embodiment of the present invention relies on different layered structures to form acoustic impedance mismatch characteristics, thereby achieving multiple reflection and noise reduction of noise. By the micro-nano lamination technique, the structure in which the multi-layered foamed sub-layer 11 and the non-foamed sub-layer 12 are laminated to each other can be easily formed by one extrusion, and the sound-insulating property of the sound-insulating member can be enhanced.

According to an embodiment of the present invention, the sound absorbing layer 120 may include at least one of polyester cotton and sound absorbing felt. Thereby, the performance of the soundproof assembly can be further improved.

According to an embodiment of the present invention, referring to FIG. 3, the soundproof assembly may further include a plurality of laminated layers 110 and a plurality of sound absorbing layers 120. The layer stack 110 and the sound absorbing layer 120 are alternately stacked. Referring to Fig. 5, thereby, the performance of the soundproof assembly can be further improved by alternately performing multilayer reflection and absorption noise.

According to an embodiment of the present invention, the layered layer 110 may have a thickness of 0.2 to 3 mm, for example, may be 0.5 to 2.5 mm. The total number of layers of the foamed sub-layer 11 and the non-foamed sub-layer 12 in the layered layer may be an even number, and may be, for example, 64 layers, 128 layers, or 320 layers. Those skilled in the art will appreciate that when the laminate layer has a thickness of 2 mm and contains 64 sub-layer structures, then each layer has an average thickness of 0.03125 mm. For example, when the laminate layer is composed of PVC, since the laminate layer has the structure of the foamed sub-layer 11 and the non-foamed sub-layer 12, the laminate layer prepared by the micro-nano laminate of the present invention may have a density of 1.0 to 1.7 9 g/ Cm ³ . The conventional filler-filled acoustic PVC material has a density of about 1.8-2.5 g/cm ³ . The PVC material is flame-retardant, weather-resistant, and soft in texture, which is convenient for coating the compressor. According to an embodiment of the invention, the sound absorbing layer may have a thickness of 4-6 mm. For example, in accordance with a particular embodiment of the invention, the sound absorbing layer may have a thickness of 5 mm. Regarding the parameters such as the thickness and density of the sound absorbing layer 120 and the layer stack 110, those skilled in the art can adjust the parameters according to the noise frequency, the sound absorbing layer 120, and the material of the layer stack 110 which are required to be reduced.

In summary, the soundproof assembly according to the embodiment of the present invention adopts the principle of combining reflection and absorption to achieve noise transmission blocking, and adopts a foamed sublayer/non-foamed sublayer alternate structure in the laminated layer. The transmission acoustic energy of the operation is reduced by reflection without increasing the overall density of the material. When the thickness of the soundproofing assembly is only 1 mm, the soundproofing amount can reach 25 dB at 100-1000 Hz. The soundproof assembly has at least one of the advantages of low cost, light weight, good sound insulation effect, high durability and the like.

According to an embodiment of the present invention, the specific position and arrangement of the soundproof assembly 100 on the base 400 and the compressor housing 500 are not particularly limited. For example, the soundproofing assembly described above may be provided at a portion where the compressor emits noise, such as a surface of a base, a compressor casing, or the like, by means of sticking, coating, or the like, to form a soundproofing assembly. As described above, the soundproofing assembly can realize soundproofing of the soundproofing assembly by adjusting parameters such as the number of layers, material, and areal density of the foamed sublayer 11 and the non-foamed sublayer 12 contained in the layered layer 110. Adjustment, therefore, at the different positions of the compressor, the above-described soundproofing assembly having different soundproofing audio can be provided, so that the noise emitted by the compressor can be further reduced.

According to an embodiment of the invention, the compressor further includes an intake line 600 and an exhaust line 700. In accordance with an embodiment of the invention, the suction line 600 and the exhaust line 700 are each coupled to a compression assembly 300. A surface of at least one of the suction line 600 and the exhaust line 700 is provided with a vibration confinement material. Thereby, the noise caused by the vibration of the pipe can be reduced by the vibration restraining material, so that the noise reduction capability of the compressor can be further improved.

According to an embodiment of the present invention, the vibration restraining material may include silicone rubber and at least one of a damping rubber, a butyl cyanide rubber, an ethylene propylene rubber, and a butyl cyanide rubber. Thereby, the ability of the vibration-constrained material to isolate the vibration-induced noise can be further improved. Specifically, the vibration-confining material may have a plurality of sub-layers stacked in sequence. Thereby, the ability of the vibration-constrained material to isolate the vibration-induced noise can be further improved. For example, the vibration-constraining material may be made of a material such as a damping rubber or a butyl cyanide rubber to form the same structure as the laminated layer 110 described above. That is to say, the vibration-constraining material may also include a structure in which a plurality of foamed sub-layers and non-foamed sub-layers are alternately laminated, and the material forming the foamed sub-layer and the material forming the non-foamed sub-layer may be the same, Can be different. The inventors have found through a large number of experiments that in the air suction line 600 and the exhaust line 700, etc., it is possible to emit a portion caused by vibration of the pipeline, and the vibration restraining material formed by the above-mentioned damping material having a wide temperature range can be provided. It can effectively alleviate the noise caused by vibration.

The vibration-constraining material used in the compressor according to the embodiment of the present invention has a wider temperature region than the compressor currently using a damping damping material such as asphalt, and can obtain a more excellent environment in a high-low temperature alternating environment. Damping noise reduction effect. Further, the vibration-constraining material formed of the above polymer material has a smaller hardness and more excellent durability than the asphalt material.

According to an embodiment of the invention, the compressor may be a high speed compressor. The rotation speed of the high-speed compressor is much higher than that of the ordinary compressor, so the bulk noise of the whole compressor is also relatively increased, and it is difficult to improve the noise reduction in the structure. In accordance with a particular embodiment of the present invention, the acoustical assembly can be disposed on the entire interior surface of the compressor housing 500 or over the outer surface of the compressor housing 500. For example, according to a specific embodiment of the present invention, a sound insulating member composed of a laminated layer composed of PVC and a sound absorbing layer composed of polyester cotton may be coated on the outer surface of the compressor casing 500. The number of layers of the laminate layer composed of PVC may be 32 to 1024 layers, and the density may be in the range of 1.2 to 1.72 g/cm ³ . On the outer surface of the base 400, a laminated layer composed of fluororubber and butyl cyanide rubber may be coated. Further, the surfaces of the intake duct 600 and the exhaust duct 700 may be coated with a vibration-constraining material having a laminated structure composed of rubber. Referring to Fig. 6, the compressor can further improve the noise reduction function of the compressor by using a combination of a soundproofing assembly (layering layer and sound absorbing layer) and a vibration restraining material in a group and noise reduction mode.

The invention is illustrated by the following specific examples. The following specific examples are intended to be illustrative only and not to limit the scope of the invention in any way, and unless otherwise specified, The conditions or steps are all conventional and the reagents and materials employed are commercially available.

Example 1:

Using PVC as a raw material, a laminate layer having a thickness of 1.5 mm, including 64 sublayer structures (1#), a laminate layer having a thickness of 1.5 mm, including 32 sublayer structures (2#), and a thickness of 2.5 mm were prepared. A layered layer stack comprising 64 layers of sublayer structure (3#). The density of 1#, 2#, and 3# is 1.2-1.72 g/cm ³ , and the hardness of the material is 68-75 A.

Comparative example 1

A single layer material having a thickness of 2.5 mm was prepared using PVC as a raw material.

The noise reduction performance of the laminated layers in Example 1 and Comparative Example 1 was tested, and the test results are shown in Fig. 7 (triangle corresponding to 1#; × corresponding to 2#; square corresponding to 3#; diamond corresponding to Comparative Example 1). As can be seen from the figure, the sound insulating effect of the first embodiment of the present invention is greatly improved as compared with Comparative Example 1, and the noise energy transmitted through the laminated layer side is remarkably lowered. Even the 1# sample having a thickness smaller than that of Comparative Example 1 was significantly higher in noise reduction performance than Comparative Example 1.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims (17)

A compressor, comprising: Base a compressor housing, the compressor housing being disposed on the base; a compression assembly disposed inside the compressor housing; a soundproofing assembly disposed on a surface of at least one of the base and the compressor housing, Wherein the soundproofing component comprises: a layer stack comprising a foamed sub-layer and a non-foamed sub-layer; a sound absorbing layer, the sound absorbing layer being disposed on a lower surface of the layer stack. The compressor according to claim 1, wherein said foamed sublayer and said non-foamed sublayer are alternately laminated in said laminated layer. The compressor according to claim 1, wherein said laminated layer comprises at least one of PVC, PU, fluororubber, butadiene rubber, and styrene-butadiene rubber. The compressor according to claim 3, wherein said laminated layer is formed of PVC. The compressor according to claim 3, wherein said laminated layer is formed by a micro-nano lamination technique. The compressor according to claim 4, wherein said foamed sub-layer and said non-foamed sub-layer are formed by the same material, by a foaming treatment or without a foaming treatment. The compressor according to claim 4, wherein said laminated layer has a density of 1.0 to 1.79 g/cm ³ . The compressor according to claim 1, wherein said sound absorbing layer comprises at least one of polyester cotton and sound absorbing felt. The compressor according to claim 1, comprising a plurality of said laminated layers and a plurality of said sound absorbing layers, said laminated layers and said sound absorbing layers being alternately stacked. The compressor according to claim 1, wherein said laminated layer has a thickness of 0.2 to 3 mm. The compressor according to claim 10, wherein said laminated layer has a thickness of 0.5 to 2.5 mm. The compressor according to claim 1, wherein said sound absorbing layer has a thickness of from 1 to 6 mm. The compressor according to claim 12, wherein said sound absorbing layer has a thickness of 4 to 6 mm. The compressor according to claim 1, further comprising: an intake line and an exhaust line, wherein the intake line and the exhaust line are respectively connected to the compression assembly, The surface of at least one of the intake line and the exhaust line has a vibration confinement material. The compressor according to claim 14, wherein said vibration restraining material comprises at least one of silicone rubber and damping rubber, butyl cyanide rubber, ethylene propylene rubber, and butyl cyanide rubber. The compressor according to claim 14, wherein said vibration confinement material has a plurality of sublayers stacked in sequence. The compressor according to claim 1, wherein said compressor is a high speed compressor.

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