Temperature-flow detection type household gas alarm
A gas alarm, flow detection technology, applied in the direction of alarms, instruments, etc., to achieve accurate alarms, avoid false alarms, and make accurate judgments
Inactive Publication Date: 2019-10-11
刘广顺
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However, in the traditional gas leakage alarm, the leakage gas detection device uses a catalytic combustion gas sensor, which uses the thermal effect principle of catalytic combustion to detect the concentration of combustible gas in the room. From the thermal effect principle of catalytic combustion, it can be known that this type of household gas alarm Its essence is not a methane gas leakage detection device, but a combustible gas detection device, which makes the gas alarm misjudge volatilized acetic acid, ethanol, oil gas, etc. as methane leakage during cooking, and false alarms occur
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[0014] The temperature-flow detection type household gas alarm includes a temperature detection device 1, a flow detection device 5, and an alarm. The temperature detection device and the flow detection device transmit the detected temperature and flow signals to the temperature and flow receiving modules 5 and 6 inside the alarm through the internal wireless signal generators 3 and 11 respectively.
[0015] The flow detection device includes a roller counter 1 , a reed switch 2 and a wireless signal generator 3 . A magnet is placed at the minimum value of the roller counter 1, and a signal circuit containing a reed switch 2 is externally connected. When there is no gas consumption, the reed switch is disconnected, and the circuit where it is located will not send out wireless signals; on the contrary, if gas consumption occurs (including gas leakage, normal use of gas), you can refer to figure 2 , the magnet on the roller counter will be close to the dry reed switch, and ma...
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The invention discloses a temperature-flow detection type household gas alarm. The gas alarm adopts a novel gas leakage detection mode, and comprises a flow detection device, a temperature detection device and an alarm device, which form independent loops respectively; the sending and receiving of temperature and flow signals are realized through a wireless device; when gas is consumed, a magnet on a roller counter in the flow detection device enables a reed pipe to be closed, and a wireless signal is transmitted; when the gas is normally used, heat generated by open fire enables a bimetallicstrip to be closed, and a wireless signal is generated; and when a controller in the alarm device only receives the flow signal and does not receive the temperature signal, an alarm is given; or otherwise, no gas leakage is considered. According to a detection principle, the indoor gas leakage is judged, so that the reliability of the gas alarm can be greatly improved.
Description
technical field [0001] The invention relates to a gas safety device, which is mainly aimed at the detection of gas leakage. Background technique [0002] With the development of society and the improvement of urban gas transmission and distribution systems, gas has gradually been adopted by more and more residential users, commercial users and industrial users due to its characteristics of low consumption, high income, low pollution and high efficiency. However, there are also many problems in the use of gas, especially for residential users. Due to the closed nature of most residential buildings, if there is a gas leak, it is easy to cause safety accidents such as explosions. Therefore, the monitoring of gas leakage is particularly important. However, in the traditional gas leakage alarm, the leakage gas detection device uses a catalytic combustion gas sensor, which uses the thermal effect principle of catalytic combustion to detect the concentration of combustible gas in ...
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IPC IPC(8): G08B21/16G08B29/18
CPCG08B21/16G08B29/188
Inventor 刘广顺彭世尼姚雪
Owner 刘广顺