Title:
PARALLEL-CONNECTED DOUBLE-FAN SYSTEM, AND RANGE HOOD APPLYING SAME
Document Type and Number:
WIPO Patent Application WO/2022/088222
Kind Code:
A1
Abstract:
A parallel-connected double-fan system and a range hood applying the same. The fan system comprises two fan systems configured to be connected in parallel. Each of the fan systems comprises a volute (21). The volute (21) comprises a front cover plate (211), a rear cover plate (212), and an annular wall (213). The annular wall (213) comprises a volute tongue (214). A first air outlet (217) covering the volute tongue (214) is provided on the rear cover plate (212). Two first air outlets (217) of the two fan systems are in communication with each other. A first profile (L1) of the volute (21) is a profile at where the annular wall (213) and the rear cover plate (212) meet. The first profile (L1) comprises a first segment (AP 3), a second segment (P3P0), a third segment (P0D), a fourth segment (DE), a fifth segment (EF), and a sixth segment (FG) sequentially and smoothly connected. A starting point of the first segment (AP3) and an end point of the sixth segment (FG) serve as a starting point and an end point of the first profile (L1), respectively. An end point of the second segment (P3P0) corresponds to an end point of the volute tongue (214) in the first profile (L1). The third segment (P0D) is a spiral segment having a constant spiral angle. The fourth segment (DE) is a spiral segment having a spiral angle gradually decreasing from the connection thereof with the third segment (P0D) to the connection thereof with the fifth segment (EF). The parallel-connected double-fan system can reduce flow loss while ensuring that the flow volume requirement is met.
Inventors:
LEI GAI (CN)
Application Number:
PCT/CN2020/126720
Publication Date:
May 05, 2022
Filing Date:
November 05, 2020
Export Citation:
Assignee:
NINGBO FOTILE KITCHEN WARE CO (CN)
International Classes:
F04D17/16; F04D25/06; F04D25/16; F04D29/28; F04D29/42; F04D29/44; F04D29/66; F24C15/20
Foreign References:
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| CN210164688U | 2020-03-20 | |||
| JP2015102046A | 2015-06-04 | |||
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| US5281092A | 1994-01-25 |
Attorney, Agent or Firm:
NINGBO CHANNEL PATENT ATTORNEYS OFFICE (CN)
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