# US 11,079,264 B2 · Portable multi-nozzle air flow meter

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- Number: US 11,079,264 B2
- Document ID: US11079264B2
- Status: Granted
- Kind: B2
- Application number: 16/245,848
- Filed: 2019-01-11
- Published: 2020-07-16
- Granted: 2021-08-03
- Earliest claimed: 2019-01-11
- Assignees: Seoul Industry Engineering Co., Ltd.
- Applicants: Seoul Industry Engineering Co., Ltd.
- Inventors: Sang Taek Oh
- Web page: https://patentgrep.com/patent/US11079264B2

## CPC

- G01F 1/36: the pressure or differential pressure being created by the use of flow constriction
- G01P 5/14: by measuring differences of pressure in the fluid
- B05B 1/14: with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening
- G01F 1/34: by measuring pressure or differential pressure
- G01F 1/40: Details of construction of the flow constriction devices
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)

## Abstract

A portable multi-nozzle air flow meter. A nozzle cover is attached to a front portion of a cylindrical housing. A nozzle panel is attached to an inner portion of the nozzle cover, with a central insertion hole being defined in a central portion thereof, such that a measuring nozzle is detachably inserted into the central insertion hole. The nozzle panel includes a sealing portion provided an inner peripheral portion of the central insertion hole. One or more fixed nozzles arranged in the nozzle panel in a circumferential direction about the measuring nozzle, such that a cross-sectional area thereof is adjustable depending on an amount of air flow discharged from a duct.

## Claims

### Claim 1

A portable multi-nozzle air flow meter comprising:
a body having defined an inlet and an outlet, through which air is intaken and discharged, and comprising a power supply to provide power to the air flow meter;
a refining unit disposed between the inlet and an opening and closing unit to alleviate mobility air intaken through the inlet;
a measuring nozzle detachably coupled to a central portion of a nozzle panel, with an air measuring hole being provided in a central portion of the measuring nozzle to measure and then discharge an amount of air;
the opening and closing unit comprising a protrusion member reducing resistance reaction force of air discharged from the air measuring hole and a damper provided integrally with the protrusion member to open and close the air measuring hole, such that air discharged from the air measuring hole is prevented from being reintroduced into the air measuring hole; and
a blower comprising a fan providing kinetic energy to air and a motor driving the fan, so that air discharged from the air measuring hole is discharged through the outlet, wherein the protrusion member has a shape selected from among a triangle, a trapezoid, and an ellipse.