A noise absorption device having lateral noise reduction element for server

Abstract

A noise reduction device for a server with lateral noise reduction elements is disposed in a server rack. The server rack has at least one air-cooled cooling fan that generates a high-temperature and high-noise airflow. The device includes: a noise reduction component frame having at least one noise reduction component, which is hermetically disposed behind the at least one air-cooled cooling fan in the server rack. Each noise reduction component corresponds to the air outlet of each of the air-cooled cooling fans. The structure of each noise reduction component includes: a noise reduction component body, which includes a contraction section pipe, a parallel section pipe, and an expansion section pipe. The wall of the parallel section pipe includes a lateral noise reduction element group, which is annularly disposed 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 mesh. Then, an isolation membrane, an isolation cavity, and a sound-absorbing material layer are sequentially disposed from the inner side of the pipe wall outward to absorb lateral noise.

Claims

1. A noise reduction device for a server with lateral noise reduction elements, configured in a server rack, the server rack having at least one air-cooled cooling fan generating a high-temperature and high-noise airflow, comprising: a noise reduction component frame having at least one noise reduction component hermetically disposed behind the at least one air-cooled cooling fan of the server rack, each noise reduction component individually corresponding to the air outlet of each air-cooled cooling fan, each noise reduction component comprising: a noise reduction component body comprising a contraction section pipe, a parallel section pipe and an expansion section pipe, wherein the wall of the parallel section pipe includes a lateral noise reduction element group arranged annularly 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 mesh, and an isolation membrane, an isolation cavity and a sound-absorbing material layer are sequentially disposed from the inner side of the pipe wall outwards to absorb lateral noise.

2. The server noise reduction device with lateral noise reduction elements as described in claim 1, wherein each noise reduction component body further comprises: a first noise-cutting tube disposed at the first end of the parallel section pipe and adjacent to the contraction section pipe; and a second noise-cutting tube disposed at the tail end of the parallel section pipe and adjacent to the expansion section pipe, the first noise-cutting tube and the second noise-cutting tube being spaced apart by a distance to form a resonant cavity pipe; 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.

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

4. A noise reduction device for a server with a lateral noise reduction element as described in claim 2, 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.

5. A noise reduction device for a server with a lateral noise reduction element as described in claim 1, wherein the isolation chamber is filled with an inert gas.

6. A noise reduction device for a server with a lateral noise reduction element as described in claim 1, wherein a gas injected into the isolation cavity is matched 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.

7. A noise reduction device for a server with a lateral noise reduction element as described in claim 2, wherein the shapes of the first noise reduction tube and the second noise reduction tube are selected from: a straight tube type or a spiral tube type.

8. A noise reduction device for a server with a lateral noise reduction element as described in claim 2, wherein the diameter lengths of the first cut-off tube, the resonant cavity tube, and the second cut-off tube are respectively used to reduce noise for a first target audio frequency, a second target audio frequency, and a third target audio frequency.

9. A noise reduction device for a server with a lateral noise reduction element as described in claim 3, wherein the diameter length of the third cut-off tube is used to reduce noise corresponding to a fourth target audio frequency.

10. A noise reduction device for a server with a lateral noise reduction element as described in claim 3, wherein the shape of the third cut-off tube is selected from: a straight tube type or a spiral tube type.

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