Warning method of fuel gas warning device

An alarm device and gas technology, applied in alarms, instruments, etc., can solve problems such as large error in alarm threshold setting, user nuisance, etc., and achieve the effects of improving safety, reducing nuisance, and reducing fright

Active Publication Date: 2015-04-29
SHENZHEN OURUIBO ELECTRONICS
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Problems solved by technology

[0003] The disadvantage of this method is that due to the large error in setting the threshold value of the alarm

Method used

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  • Warning method of fuel gas warning device
  • Warning method of fuel gas warning device
  • Warning method of fuel gas warning device

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Embodiment Construction

[0029] In order to fully understand the technical content of the present invention, the technical solution of the present invention will be further introduced and illustrated below in conjunction with specific embodiments.

[0030] Such as figure 1 As shown, it is an alarm timing diagram of a traditional gas alarm, which presets a threshold much lower than the dangerous concentration (generally 25% LEL, that is, 25% of the lower limit of explosive concentration), when the detected gas concentration in the environment is higher than The threshold value will send out the sound and light alarm signal, the user can manually cancel the sound and light alarm signal or the sound and light alarm signal will be automatically canceled after removing the danger source. If the user generates nuisance, the user also needs to take a risk to turn off the alarm. Therefore need a kind of gas alarm, while adopting new alarm method can guarantee to provide enough accurate and timely alarm, do n...

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Abstract

The invention relates to a warning method of a fuel gas warning device. The first threshold value, the safe concentration change rate and the pre-warning duration of the situation that the fuel gas concentration change rate is higher than the safe concentration change rate are preset in the fuel gas warning device. When the fuel gas concentration change rate is higher than the safe concentration change rate for a time period longer than the pre-warning duration and fuel gas concentration is lower than the first threshold value, the fuel gas warning device is in the pre-warning state and gives a pre-alarm. When fuel gas concentration rises to be higher than the first threshold value, the fuel gas warning device is in the danger alarm state and gives a danger alarm. According to the method, fuel gas users can not panic at hearing a loud danger alarm, the old and children in a house are prevented from getting scared, and disturbance of a tradition fuel gas alarm to users is reduced; due to the fact that users are reminded that fuel gas concentration is rising before fuel gas concentration reaches the alarm threshold value, users can find the reason in time to prevent dangers, and safety is improved.

Description

technical field [0001] The invention relates to the technical field of signal alarms, in particular to an alarm method for a gas alarm device. Background technique [0002] As coal gas, natural gas, biogas and other gas enter most households as a clean and environmentally friendly energy source, in order to ensure the safety of gas use, gas alarms are gradually becoming popular. The alarm method of the gas sensor sold on the market is: preset a much lower threshold than the dangerous concentration (generally 25% LEL, i.e. 25% of the lower limit of explosive concentration), when the gas concentration in the environment is monitored to be higher than the threshold The sound and light alarm signal is issued, and the user can manually cancel the sound and light alarm signal or the sound and light alarm signal is automatically canceled after removing the danger source, such as figure 1 shown in the time diagram. [0003] The disadvantage of this method is that due to the large ...

Claims

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Application Information

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IPC IPC(8): G08B21/16
CPCG08B21/16
Inventor 谭荣港隋学鹏刘文扬
Owner SHENZHEN OURUIBO ELECTRONICS
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