差圧式流量計

Japanese Patent JP7193088

B2

To provide a differential flowmeter with which it is possible to measure a more accurate flow rate.SOLUTION: Provided is a differential flowmeter for measuring the flow rate of a fluid flowing in a flow path. The differential flowmeter comprises: a pair of pressure difference generators arranged serially to the flow path, for generating a pressure difference in the fluid; and a flow rate measurement mechanism for measuring the flow rate of a fluid flowing in the flow path on the basis of a first pressure difference which is a difference between the first pressure of a fluid flowing into the pressure difference generator on the upstream side and the second pressure of a fluid flowing out of the pressure difference generator on the upstream side and flowing into the pressure difference generator on the downstream side and a second pressure difference between the second pressure and the third pressure of a fluid flowing out of the pressure difference generator on the downstream side. The pair of pressure difference generators have an internal flow path in mutually different length, and the flow path shapes on the upstream end side in the internal flow paths of both pressure difference generators are set to approximately the same shape loss, as well as the flow path shapes on the downstream end side in the internal flow paths of both pressure difference generators are set to approximately the same shape loss.SELECTED DRAWING: Figure 1

Takashi Shimada
Ryoji Doihara
Jeong Ker Wee
Masanori Terasaka
Norihiko Tamura
Akihiro Nakamura
Takehiro Hayashi

JP2019059221A

December 20, 2022

March 26, 2019

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National Institute of Advanced Industrial Science and Technology
HORIBA STEC Co., Ltd.

G01F1/48; G01F1/00; G01F1/50; G01F15/02

US20140208833

Nishimura Ryuhei
Shindai Saito
Yoshinaga Uemura

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