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Alarm method of a gas alarm 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: 2017-09-12
SHENZHEN OURUIBO ELECTRONICS
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  • Abstract
  • Description
  • Claims
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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, it will cause nuisance to the user due to false alarms, and the user needs to take a risk to turn off the alarm

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  • Alarm method of a gas alarm 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 Shown is the alarm sequence diagram of a traditional gas alarm. It presets a threshold much lower than the dangerous concentration (usually 25% LEL, that is, 25% of the lower limit of explosive concentration). When it is detected that the gas concentration in the environment is higher than This threshold will send out an audible and visual alarm signal. The user can manually cancel the audible and visual alarm signal or automatically cancel the audible and visual alarm signal after removing the hazard. The disadvantage of this method is that due to the large error of the alarm threshold setting, it will cause false alarms. If users generate nuisance, they also need to take the risk to turn off the alarm. Therefore, there is a need for ...

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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 of a gas alarm device. Background technique [0002] As gas, natural gas, biogas and other gas enter most households as a clean and environmentally friendly energy source, gas alarms have gradually become popular in order to ensure the safety of gas use. The alarm method of gas sensors sold on the market is: preset a threshold much lower than the dangerous concentration (usually 25% LEL, that is, 25% of the lower limit of explosive concentration), when the gas concentration in the environment is monitored to be higher than the threshold A sound and light alarm signal is issued, and the user can manually cancel the sound and light alarm signal or automatically cancel the sound and light alarm signal after removing the dangerous source, such as figure 1 The time chart is shown. [0003] The disadvantage of this method is that, due to the large error in the setting o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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