GAS SAFETY DEVICE

WIPO Patent Application WO/2020/235421

A1

The present invention is provided with: a flow passage (101); a flow rate measurement unit (103) that measures the flow rate of a gas flowing through the flow passage (101); a gas-side-absolute-pressure pressure sensor (105) that measures the absolute pressure of the gas; and an atmosphere-side-absolute-pressure pressure sensor (106) that measures the absolute pressure of the atmospheric pressure. The present invention is also provided with: a pressure value collection unit (108) that collects a predetermined number of pressure values measured by the gas-side-absolute-pressure pressure sensor (105) and the atmosphere-side-absolute-pressure pressure sensor (106) in a predetermined measurement time period; and a gas pressure determination unit (109) that calculates a pressure from the difference between average values collected by the pressure value collection unit (108).The present invention is further provided with: a shutoff valve (102) that shuts off the flow passage (101); and a control circuit (104) that controls the flow rate measurement unit (103) and that, if it is determined that the flow rate measured by the flow rate measurement unit (103) or a pressure change measured by the gas pressure determination unit (109) is abnormal, shuts off the flow passage (101) with the shutoff valve (102).

GYOUTOKU TAITI
YASUDA KENJI
UCHIDA KENTA

PCT/JP2020/019150

November 26, 2020

May 13, 2020

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PANASONIC IP MAN CO LTD (JP)

G01F3/22; G01L15/00

JP2014098563A	2014-05-29
JP2019502435A	2019-01-31
JPH0777584A	1995-03-20
JPH06180373A	1994-06-28
JP2018169299A	2018-11-01
JP2019066347A	2019-04-25
JP2015145826A	2015-08-13
JP2015145827A	2015-08-13
JP2006520901A	2006-09-14

KAMATA Kenji et al. (JP)

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