Household gas alarm

The utility model discloses a household gas alarm. The utility model belongs to the technical field of gas, alarm device, a filter box is arranged below the alarm; a fuel gas filter screen is mountedon the inner side of the filter box; a carbon monoxide filter screen is arranged below the fuel gas filter screen, an activated carbon filter screen is installed below the carbon monoxide filter screen, an air inlet fan is arranged on one side of the filter box, an air inlet pipe is arranged on the side, away from the filter box, of the air inlet fan, and an exhaust fan is installed below the airinlet fan; according to the utility model, the nut, the connecting plate, the screw rod, the strong spring, the threaded hole, the fixing screw, the mounting fixing plate and the magnet pressing plateare arranged; the position of the alarm can be adjusted according to needs, so that the alarm is closer to articles such as a gas tank and a gas stove, the possibility of screw loosening can be reduced through the magnet press