Gas safety device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 1, 2023
Grant Date -
May 12, 2022
app pub date -
May 13, 2020
filing date -
May 17, 2019
priority date (Note) -
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Abstract
A gas safety device includes flow path, shutoff valve that shuts off flow path, flow rate measurement unit that measures a flow rate of gas, gas-side absolute pressure sensor that measures absolute pressure of the gas, atmosphere-side absolute pressure sensor that measures absolute pressure of atmospheric pressure, and pressure value transition detector that detects a transition state of the absolute pressure measured by gas-side absolute pressure sensor. Further provided are sensor drive controller that controls driving of atmosphere-side absolute pressure sensor in accordance with a value of pressure transition in pressure value transition detector, and gas pressure determination unit that calculates gas supply pressure from a difference between pressure values measured when the two sensors are driven. Control circuit is further provided to shut off flow path with shutoff valve when determining anomaly from a flow rate measured by flow rate measurement unit and gas supply pressure calculated by gas pressure determination unit.
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