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CN-121999744-A - Noise reduction unit and noise reduction device

CN121999744ACN 121999744 ACN121999744 ACN 121999744ACN-121999744-A

Abstract

The embodiment of the application belongs to the technical field of sound absorption and noise reduction, and particularly relates to a noise reduction unit and a noise reduction device. The embodiment of the application aims to solve the problem of poor noise reduction effect of the related noise reduction device. The noise reduction unit and the noise reduction device comprise a plurality of sound absorption structures, wherein each sound absorption structure comprises a sound absorption cavity and a sound absorption hole which are communicated. The plurality of sound absorbing structures are respectively used for attenuating or absorbing noise in different frequency bands. Through the arrangement, the plurality of sound absorption structures respectively attenuate or absorb noise in different frequency bands, so that the range of the frequency bands which can be covered by the noise reduction unit and the noise reduction device is increased, and the noise reduction effect of the noise reduction unit and the noise reduction device is improved.

Inventors

  • MOU FEI
  • MENG YONGZHE
  • MA YUANLIN
  • GONG DONGQIAO
  • CHEN ZHAOQIN

Assignees

  • 青岛海尔智慧厨房电器有限公司
  • 海尔智家股份有限公司

Dates

Publication Date
20260508
Application Date
20260228

Claims (18)

  1. 1. A noise reduction unit, characterized by comprising a sound absorbing structure (110), the sound absorbing structure (110) comprising a sound absorbing cavity (111) and a sound absorbing hole (112) which are communicated; the sound absorbing structures (110) are multiple, and the sound absorbing structures (110) are respectively used for correspondingly attenuating or absorbing noise in different frequency bands.
  2. 2. The noise reduction unit according to claim 1, wherein the sound absorbing structures (110) include a plurality of sound absorbing chambers (111) having different volumes and/or, The plurality of sound absorbing holes (112) included in the plurality of sound absorbing structures (110) are different in pore diameter.
  3. 3. The noise reduction unit according to claim 1, wherein the plurality of sound absorbing structures (110) are arranged in a concentrated manner in a same area, and the plurality of sound absorbing holes (112) have a same opening orientation.
  4. 4. The noise reduction unit according to claim 1, wherein the plurality of sound absorbing structures (110) are configured to attenuate or absorb noise in a frequency range of 500Hz-2000Hz by being combined, and frequencies of the noise attenuated or absorbed by the sound absorbing structures (110) are different for each sound absorbing structure within the same combined range.
  5. 5. The noise reduction unit of claim 1, wherein the noise reduction unit comprises a housing (120) and a partition assembly (130); -said housing (120) defining a housing cavity (1211) therein, said housing (120) being configured with a plurality of said sound absorbing apertures (112); the separation assembly (130) is arranged in the shell cavity (1211) and separates the shell cavity (1211) into a plurality of sound absorption cavities (111), and the sound absorption cavities (111) are communicated with the corresponding sound absorption holes (112).
  6. 6. The noise reduction unit according to claim 5, characterized in that one end of the housing (120) in the width direction has a first fitting side (1201); The separation assembly (130) comprises a vertical partition plate (131), a transverse partition plate (132) and a closed partition plate (133); One end of the vertical partition plate (131) is connected to the first assembling side (1201), and the vertical partition plate (131) divides the shell cavity (1211) into a plurality of vertical cavities arranged along the length direction of the outer shell (120); the diaphragm plate (132) is arranged in the vertical cavity, one end of the diaphragm plate (132) is connected to the first assembly side (1201), and the vertical cavity is divided into a plurality of transverse cavities distributed along the height direction of the shell (120); the closing baffle (133) is blocked on one side of at least part of the transverse cavity, which faces away from the first assembly side (1201); each sound absorbing aperture (112) communicates with at least one of the transverse chambers.
  7. 7. The noise reduction unit according to claim 6, wherein the plurality of vertical partitions (131) is provided, and the plurality of vertical partitions (131) are arranged at intervals along the length direction of the housing (120); the number of the transverse baffles (132) in the vertical cavity is multiple, and the transverse baffles (132) are distributed at intervals along the height direction of the shell (120).
  8. 8. The noise reduction unit according to claim 7, wherein the housing (120) further has a second fitting side (1202) opposite the first fitting side (1201); the vertical partition plate (131) comprises a first vertical plate (1311), and the first vertical plate (1311) and the shell (120) are enclosed to form a first vertical cavity; The diaphragm plate (132) comprises a first diaphragm plate (1321) and a second diaphragm plate (1322), the first diaphragm plate (1321) and the second diaphragm plate (1322) are sequentially arranged in the first vertical cavity from top to bottom, and the first vertical cavity is divided into a first transverse cavity (1301), a second transverse cavity (1302) and a third transverse cavity (1303) which are arranged from top to bottom; The plurality of sound-absorbing chambers (111) includes a first sound-absorbing chamber (1111); The sealing partition plate (133) comprises a first sealing plate (1331), and the first sealing plate (1331) is plugged on one side, away from the sound absorption holes (112), of the second transverse cavity (1302) so as to form a first sound absorption cavity (1111).
  9. 9. The noise reduction unit of claim 8, wherein the vertical partition (131) comprises a second riser (1312), the second riser (1312) enclosing with the housing (120) forming a third vertical cavity; The diaphragm plate (132) further comprises a fifth diaphragm plate (1325) and a sixth diaphragm plate (1326), the fifth diaphragm plate (1325) and the sixth diaphragm plate (1326) are sequentially arranged in the third vertical cavity from top to bottom, and the third vertical cavity is divided into a seventh transverse cavity (1307), an eighth transverse cavity (1308) and a ninth transverse cavity (1309) which are arranged from top to bottom; the plurality of sound-absorbing chambers (111) further comprises a fourth sound-absorbing chamber (1114); The sealing partition plate (133) further comprises a fourth sealing plate (1334), and the fourth sealing plate (1334) is plugged on one side, away from the sound absorption holes (112), of the ninth transverse cavity (1309) so as to form a fourth sound absorption cavity (1114).
  10. 10. The noise reduction unit of claim 9, wherein the fifth cross plate (1325) is spaced apart from the second assembly side (1202); The plurality of sound-absorbing chambers (111) further includes a seventh sound-absorbing chamber (1117); the seventh transverse cavity (1307) and the eighth transverse cavity (1308) are in communication and form the seventh sound-absorbing cavity (1117).
  11. 11. The noise reduction unit of claim 9, wherein the first riser (1311) and the second riser (1312) enclose a second riser cavity therebetween; The diaphragm plate (132) further comprises a third diaphragm plate (1323) and a fourth diaphragm plate (1324), the third diaphragm plate (1323) and the fourth diaphragm plate (1324) are sequentially arranged in the second vertical cavity from top to bottom, and the second vertical cavity is divided into a fourth transverse cavity (1304), a fifth transverse cavity (1305) and a sixth transverse cavity (1306) which are arranged from top to bottom; the plurality of sound-absorbing chambers (111) further includes a second sound-absorbing chamber (1112); The sealing partition plate (133) further comprises a second sealing plate (1332), and the second sealing plate (1332) is plugged on one side, away from the sound absorption holes (112), of the fourth transverse cavity (1304) so as to form a second sound absorption cavity (1112).
  12. 12. The noise reduction unit according to claim 11, characterized in that the first cross plate (1321), the second cross plate (1322), the first closing plate (1331) and the second closing plate (1332) are arranged at a distance from the second mounting side (1202), respectively; The plurality of sound-absorbing cavities (111) further comprises a fifth sound-absorbing cavity (1115); the first transverse cavity (1301), the third transverse cavity (1303), the housing cavity (1211) are in communication with a portion of the first closing plate (1331) between the second mounting side (1202) and a portion of the housing cavity (1211) between the second closing plate (1332) and the second mounting side (1202), and form the fifth sound-absorbing cavity (1115).
  13. 13. The noise reduction unit according to claim 11, wherein a plurality of the sound absorbing cavities (111) further comprises a third sound absorbing cavity (1113); The sealing partition plate (133) further comprises a third sealing plate (1333), and the third sealing plate (1333) is plugged on one side, away from the sound absorption holes (112), of the fifth transverse cavity (1305) so as to form a third sound absorption cavity (1113).
  14. 14. The noise reduction unit according to claim 13, characterized in that the fourth cross plate (1324) and the third closing plate (1333) are arranged at a distance from the second mounting side (1202), respectively; The plurality of sound-absorbing cavities (111) further comprises a sixth sound-absorbing cavity (1116); The sixth transverse cavity (1306) and the shell cavity (1211) are in communication with a portion of the third closure plate (1333) between the second mounting side (1202), and form the sixth sound-absorbing cavity (1116).
  15. 15. The noise reduction unit of claim 11, wherein the first riser (1311) is configured with a notched portion (1317), the notched portion (1317) being configured to communicate the first vertical cavity and the second vertical cavity.
  16. 16. The noise reduction unit according to any one of claims 6-15, characterized in that a plurality of the sound absorbing holes (112) comprised in a plurality of the sound absorbing structures (110) are each configured at the first fitting side (1201).
  17. 17. The noise reduction unit according to any one of claims 5-15, characterized in that the housing (120) comprises a housing body (121) and a cover plate (122); The case body (121) defines a case cavity (1211), one side of the case cavity (1211) in the width direction has an opening (1212), and the partition member (130) is disposed in the case cavity (1211); the cover plate (122) is covered on the opening (1212).
  18. 18. A noise reduction device, characterized by comprising a plurality of noise reduction units (10) according to any one of claims 1-17, a plurality of said noise reduction units (10) being connected.

Description

Noise reduction unit and noise reduction device Technical Field The embodiment of the application belongs to the technical field of sound absorption and noise reduction, and particularly relates to a noise reduction unit and a noise reduction device. Background Noise is widely present in scenes such as industry, traffic, buildings, consumer electronics, household appliances and the like, and most of the noise is superimposed by low frequency, medium frequency and high frequency, so that the treatment difficulty is high. The noise reduction device in the related art mostly reduces noise in a single frequency band, however, the noise in multiple frequency bands often presents random superposition and time-varying coupling characteristics, and the noise reduction effect in the single frequency band is poor. Accordingly, there is a need in the art for a new noise reduction unit and noise reduction device to address the above-described problems. Disclosure of Invention The main purpose of the embodiment of the application is to provide a noise reduction unit and a noise reduction device so as to solve the problem of poor noise reduction effect of the related noise reduction device. In order to achieve the above object, an embodiment of the present application provides a noise reduction unit, including a sound absorbing structure, the sound absorbing structure includes a sound absorbing cavity and a sound absorbing hole which are communicated; the sound-absorbing structures are multiple and are used for attenuating or absorbing noise in different frequency bands respectively. In one possible implementation, the plurality of sound-absorbing cavities included in the plurality of sound-absorbing structures are different in volume, and/or, The plurality of sound absorbing holes included in the plurality of sound absorbing structures are different in aperture. In one possible implementation, the plurality of sound absorbing structures are arranged in a concentrated manner in the same area, and the plurality of sound absorbing holes have the same hole orientation. In one possible implementation, the plurality of sound absorbing structures are configured to attenuate or absorb noise in the frequency range of 500Hz-2000Hz by combining, and each sound absorbing structure has a different frequency of the attenuated or absorbed noise within the same combined range. In one possible implementation, the noise reduction unit includes a housing and a partition assembly; The shell is internally limited with a shell cavity, and is provided with a plurality of sound absorption holes; the separation component is arranged in the shell cavity and separates the shell cavity into a plurality of sound absorption cavities, and the sound absorption cavities are communicated with corresponding sound absorption holes. In one possible implementation, one end of the housing in the width direction has a first fitting side; the separation assembly comprises a vertical separation plate, a transverse separation plate and a closed separation plate; one end of the vertical partition board is connected to the first assembling side, and the vertical partition board divides the shell cavity into a plurality of vertical cavities distributed along the length direction of the shell; The diaphragm plate is arranged in the vertical cavity, one end of the diaphragm plate is connected to the first assembly side, and the vertical cavity is divided into a plurality of transverse cavities which are distributed along the height direction of the shell; The sealing partition board is blocked at one side of at least part of the transverse cavity, which is away from the first assembling side; each sound absorbing hole is communicated with at least one transverse cavity. In one possible implementation manner, the plurality of vertical partition plates are arranged at intervals along the length direction of the shell; The diaphragm plates in the vertical cavity are multiple, and the diaphragm plates are distributed at intervals along the height direction of the shell. In one possible implementation, the housing further has a second mounting side opposite the first mounting side; the vertical partition plate comprises a first vertical plate, and the first vertical plate and the shell are enclosed to form a first vertical cavity; The diaphragm plate comprises a first diaphragm plate and a second diaphragm plate, the first diaphragm plate and the second diaphragm plate are sequentially arranged in the first vertical cavity from top to bottom, and the first vertical cavity is divided into a first transverse cavity, a second transverse cavity and a third transverse cavity which are arranged from top to bottom; The plurality of sound-absorbing cavities includes a first sound-absorbing cavity; The sealing partition plate comprises a first sealing plate, and the first sealing plate is plugged at one side of the second transverse cavity, which is away from the sound absorption