| 摘要 |
PURPOSE:To reduce the number of blocking times while attaining safety, by changing the time reaching the blocking of gas from a time, when an accident of gas from a time, when an accident was generated, corresponding to a time zone and the flow amount of supplied gas when the blocking of gas is performed on the basis of a gas leakage detection signal. CONSTITUTION:When gas leakage is generated in a gas instrument 3, a gas leakage detector 1 is operated to send out gas leakage information to an operation circuit 23. Because gas flow amount information is always sent to the operation circuit 23 from a flowmeter 5, the time for blocking gas is operated from the gas flow amount information and time information to perform the setting of the time of a timer 24. The timer 24 applies gas blocking information to blocking valve 4 after the set time was elapsed. At this time, because the operation circuit 23 monitors the time information from a clock circuit 25, said circuit 23 performes different operation corresponding to a time zone. |
