A noise absorption device having multiple noise reducing elements for large scale server

Abstract

A noise reduction device for a large server with multiple noise reduction elements is configured in a server rack. The server rack has a plurality of air-cooled cooling fans that generate a high-temperature and high-noise airflow. The device includes: a noise reduction component frame having a plurality of noise reduction components hermetically disposed behind the air-cooled cooling fans of the server rack. Each noise reduction component individually corresponds to the air outlet of each air-cooled cooling fan. The structure of each noise reduction component includes: a noise reduction component body comprising a contraction section duct, a parallel section duct, and an expansion section duct; a first cut... A first sound-cutting tube is disposed at the first end of the parallel section pipe, adjacent to the contraction section pipe; and a second sound-cutting tube is disposed at the last end of the parallel section pipe, adjacent to the expansion section pipe. The first sound-cutting tube and the second sound-cutting tube are spaced apart to form a resonant cavity pipe. The noise reduction component body, the first sound-cutting tube, and the second sound-cutting tube constitute a continuous structure of five pipe segments: the contraction section pipe, the first sound-cutting tube pipe, the resonant cavity pipe, the second sound-cutting tube pipe, and the expansion section pipe. The parallel section pipes of at least two of the noise reduction components have different lengths.

Claims

1. A noise reduction device for a large server with multiple noise reduction elements, configured in a server rack, the server rack having a plurality of air-cooled cooling fans generating a high-temperature and high-noise airflow, comprising: a noise reduction component frame having a plurality of noise reduction components hermetically disposed behind the air-cooled cooling fans of the server rack, each of the noise reduction components individually corresponding to the air outlet of each of the air-cooled cooling fans, each of the noise reduction components comprising: a noise reduction component body including a contraction section duct, a parallel section duct, and an expansion section duct; a first sound-cutting tube disposed at the first end of the parallel section duct and adjacent to the contraction section duct; and a second sound-cutting tube disposed at the tail end of the parallel section duct and adjacent to the expansion section duct, the first sound-cutting tube and the second sound-cutting tube being spaced apart by a gap to form a resonant cavity duct; wherein... The noise reduction component body, the first sound cutter tube, and the second sound cutter tube constitute a continuous structure of five pipe segments: the contraction section pipe, the first sound cutter tube pipe, the resonant cavity pipe, the second sound cutter tube pipe, and the expansion section pipe; wherein, at least two of the noise reduction components have different lengths of their parallel pipe segments.

2. The noise reduction device for a large server with multiple noise reduction elements as described in claim 1, wherein the structure of each of the noise reduction components further includes: a third cut-off tube disposed in the expansion section pipe.

3. A noise reduction device for a large server with multiple noise reduction elements as described in claim 1, wherein the walls of the first sound-cutting tube, the second sound-cutting tube, the contraction section pipe, the parallel section pipe and the expansion section pipe are treated to have a specific directional uneven surface.

4. The noise reduction device for large servers with multiple noise reduction elements as described in claim 1, wherein the structure of each of the noise reduction components further includes: a nose cone structure assembly, comprising a nose cone structure body, a nose cone, and a nose cone structure support, the nose cone structure support being fixed to the nose cone structure body, and the nose cone being fixed to the nose cone structure support, for reducing the turbulence generated by each of the air-cooled cooling fans; wherein, The nose cone structure assembly is fixed to the front end of the contraction section duct of the noise reduction assembly body and adjacent to the air outlet of each of the air-cooled cooling fans; and a sound-absorbing material layer is disposed on the wall of the contraction section duct to perform primary absorption of the noise generated by each of the air-cooled cooling fans.

5. A noise reduction device for a large server with multiple noise reduction elements as described in claim 4, wherein the wall of the parallel section pipe includes a lateral noise reduction element group, which is arranged in a ring within the parallel section pipe of the noise reduction component body. The wall structure of the parallel section pipe of the noise reduction component body is formed by an isolation net, and an isolation membrane, an isolation cavity, and a second sound-absorbing material layer are arranged sequentially from the inner side of the pipe wall outward to absorb lateral noise.

6. The noise reduction device for a large server with multiple noise reduction elements as described in claim 5, wherein the nose cone structure assembly further includes a plurality of nose wing structures formed on the nose cone, and the noise reduction assembly body has a plurality of airflow wing arranged at the position of the sound-absorbing material layer, the arrangement of which is combined with the nose wings to form an airflow channel and forms a fixed interval with the nose wings.

7. A noise reduction device for a large server with multiple noise reduction elements as described in claim 6, wherein the first noise cutter and the second noise cutter form a detachable structure with respect to the noise reduction component body, and the combination of the first noise cutter and the second noise cutter can be replaced by means of the detachable structure to respond to and reduce the noise of the highest intensity noise frequency generated by each of the air-cooled cooling fans.

8. A noise reduction device for a large server with multiple noise reduction elements as described in claim 7, wherein the nose structure and the air deflector system are linear or curved.

9. A noise reduction device for a large server with multiple noise reduction elements as described in claim 5, wherein the isolation cavity is filled with a gas that is mixed with the material of the sound-absorbing material layer to filter out a fifth target audio frequency and reduce the noise of the fifth target audio frequency.

10. A noise reduction device for a large server with multiple noise reduction elements as described in claim 2, wherein the diameter lengths of the first cutoff tube, the resonant cavity tube, the second cutoff tube, and the third cutoff tube are respectively used to reduce noise for a first target audio frequency, a second target audio frequency, a third target audio frequency, and a fourth target audio frequency.

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