Title:
VENTILATION SOUND-DIMINISHING APPARATUS AND VENTILATION THERAPY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/135146
Kind Code:
A1
Abstract:
Provided are a ventilation sound-diminishing apparatus (9) and a ventilation therapy device. The ventilation sound-diminishing apparatus (9) comprises a sound-diminishing housing (2) having a gas flow channel (1); the flow channel side walls of the gas flow channel (1) comprise a first flow channel side wall and a second flow channel side wall arranged opposite to each other in a first direction; a plurality of first scattering bodies (5) extending toward the interior of the gas flow channel (1) and arranged in a plurality of rows and columns at intervals are provided on the inner surface of the side wall of the first flow channel; a plurality of second scattering bodies (6) extending toward the interior of the gas flow channel (1) and arranged in a plurality of rows and columns at intervals are provided on the inner surface of the side wall of the second flow channel; a predetermined distance is maintained between the first scattering bodies (5) and the second scattering bodies (6) in the first direction. A specific frequency in a certain interval of sound wave is attenuated due to the oscillation in the array structure, thus achieving the effect of reducing the intensity of that frequency interval, effectively reducing low-frequency noise in an intended elimination frequency band, and enhancing the comfort of use when installed in a ventilation therapy device.
Inventors:
BI WEIDONG (CN)
YI PINGHU (CN)
ZHUANG ZHI (CN)
ZHI JIANXIN (CN)
YI PINGHU (CN)
ZHUANG ZHI (CN)
ZHI JIANXIN (CN)
Application Number:
PCT/CN2021/136280
Publication Date:
June 30, 2022
Filing Date:
December 08, 2021
Export Citation:
Assignee:
BMC MEDICAL CO LTD (CN)
International Classes:
A61M16/00; F01N1/10; G10K11/16
Foreign References:
| CN215024279U | 2021-12-07 | |||
| CN112587774A | 2021-04-02 | |||
| CN109708385A | 2019-05-03 | |||
| CN107245964A | 2017-10-13 | |||
| CN112020743A | 2020-12-01 | |||
| CN202418373U | 2012-09-05 | |||
| CN108729367A | 2018-11-02 | |||
| US20180340328A1 | 2018-11-29 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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