FAN UNIT - DAIKIN IND LTD

Title:

FAN UNIT

Document Type and Number:

WIPO Patent Application WO/2022/071396

Kind Code:

A1

Abstract:

A fan unit connected to a duct, wherein it is possible to detect airflow volume without installing a sensor in the duct. An airflow volume detection unit (50) has a main body unit (52) and a probe (51) for detecting an airflow volume equivalent, which corresponds to the airflow volume of a centrifugal fan. The surface of a first bellmouth (41) has a shape which forms a curved line, the convexity of which is oriented toward a rotational axis (34) when viewing a cross-section obtained by cutting along a plane which contains the rotational axis (34). The main body section (52) is secured to a fan casing (31) and/or to the first bellmouth (41). The probe (51) is positioned in the direction in which the surface of the first bellmouth (41) projects and along a normal to the surface of the first bellmouth (41), and there is a gap between the probe and the surface of the first bellmouth (41) which is greater than 0 and less than 1/3 the radius of the air intake port.

Inventors:

TANAKA SHUUICHI
KOMATSU AKIRA
FUJIMOTO TOORU

Application Number:

PCT/JP2021/035870

Publication Date:

April 07, 2022

Filing Date:

September 29, 2021

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)

International Classes:

F04D29/00; F04D27/00; F04D29/44

Domestic Patent References:

WO1992022790A1

1992-12-23

Foreign References:

US20110217182A1	2011-09-08
JPH0882299A	1996-03-26
JP2019167828A	2019-10-03
US20110250051A1	2011-10-13
US6186744B1	2001-02-13
JP2019167828A	2019-10-03

Other References: