Title:
FRESH AIR VENTILATOR AND NOISE REDUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/103888
Kind Code:
A1
Abstract:
Provided in the present application are a fresh air ventilator and a noise reduction method therefor. The fresh air ventilator comprises: a fan set, which comprises at least two fans; rotational speed sensors, which are each provided at each fan; a first noise detection apparatus, which is configured to collect first noise when a started fan operates; a second noise detection apparatus, which is configured to collect second noise when other started fans operate; and a controller, which is configured to receive data of the first noise and data of the second noise, and according to the data of the first noise and the data of the second noise, adjust the rotational speeds of the fans that are measured by the rotational speed sensors, so as to make the frequency of first noise collected after adjustment the same as the frequency of second noise collected after adjustment, wherein the amplitude of the noise generated by the fresh air ventilator is within a preset amplitude range.
Inventors:
QI CONGLIANG (CN)
WU AOLI (CN)
WU AOLI (CN)
Application Number:
PCT/CN2022/136011
Publication Date:
June 15, 2023
Filing Date:
December 01, 2022
Export Citation:
Assignee:
JIANGSU CASRS POLLUTION CONTROL ENG CO LTD (CN)
International Classes:
F24F7/007; F24F11/64; F24F11/77; F24F11/89; F24F13/24; F24F130/40
Foreign References:
| CN114165881A | 2022-03-11 | |||
| CN111609514A | 2020-09-01 | |||
| CN112254217A | 2021-01-22 | |||
| CN113237196A | 2021-08-10 | |||
| CN112728808A | 2021-04-30 | |||
| JPH0411515A | 1992-01-16 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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