Title:
GAS SAFETY DEVICE
Document Type and Number:
Japanese Patent JP2023101797
Kind Code:
A
Abstract:
To improve measurement accuracy of gas supply pressure in a gas safety device capable of measuring the gas supply pressure.SOLUTION: The gas safety device includes: a flow passage 101; a flow rate measurement portion 103 that measures a flow rate of gas flowing through the flow passage 101; a gas-side absolute pressure sensor 105 that measures absolute pressure of the gas; an atmosphere-side absolute pressure sensor 106 that measures absolute pressure of atmospheric pressure; differential pressure value collection means 201 that collects n differential values of pressure values measured at the same timing by the gas-side absolute pressure sensor 105 and the atmosphere-side absolute pressure sensor 106 in a predetermined measurement time; gas pressure determination means 209 that calculates gas supply pressure from an average value of n differential pressure values collected by the differential pressure value collection means 201; a shutoff valve 102 that shuts off the flow passage 101; and a control circuit 204 that controls the flow rate measurement portion 103 and that, if it is determined that the flow rate measured by the flow rate measurement portion 103 or a pressure change measured by the gas pressure determination means 209 is abnormal, shuts off the flow passage 101 with the shutoff valve 102.SELECTED DRAWING: Figure 3
Inventors:
GYOTOKU TAICHI
YASUDA KENJI
UCHIDA KENTA
YASUDA KENJI
UCHIDA KENTA
Application Number:
JP2023092097A
Publication Date:
July 21, 2023
Filing Date:
June 05, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
G01F3/22; G01F1/66
Domestic Patent References:
| JP2014098563A | 2014-05-29 | |||
| JP2019502435A | 2019-01-31 | |||
| JP2018169299A | 2018-11-01 | |||
| JP2019066347A | 2019-04-25 | |||
| JP2005233437A | 2005-09-02 | |||
| JP2000292238A | 2000-10-20 | |||
| JPH1137459A | 1999-02-12 |
Attorney, Agent or Firm:
Hokuto Patent Attorneys Office