Toxic gas prevention and control system

Abstract

The utility model relates to a poisonous gas prevention and control system which comprises a plurality of harmful gas concentration detection devices distributed indoors and at least one ventilating fan, any harmful gas concentration detection device comprises a box body, a poisonous gas concentration sensor and a combustible gas concentration sensor, and a gas collection chamber is arranged in the box body; a plurality of air filtering holes are formed in the surface of the box body, the air collecting chamber is communicated with the outside of the box body through the air filtering holes, the toxic gas concentration sensor and the combustible gas concentration sensor are arranged in the air collecting chamber, and the toxic gas concentration sensor and the combustible gas concentration sensor are both electrically connected with the ventilating fan. The ventilator is automatically started based on the electric signals sent by the poisonous gas concentration sensor and / or the combustible gas concentration sensor so as to conduct air exhaust and ventilation on the corresponding space, the efficiency and the portability degree of ventilation operation are improved, and the safety of utilizing coal, firewood or coal gas to make fire and supply energy in a rural room can be improved.

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