Fire extinguishing device and range hood using same

The utility model discloses a fire extinguishing device and discloses a smoke exhaust ventilator applying the fire extinguishing device, the fire extinguishing device comprises a spraying mechanism, the spraying mechanism comprises a conveying pipe and a first fire extinguishing spraying head, the first fire extinguishing spraying head is a hot melting spraying head, the first fire extinguishing spraying head is communicated with the conveying pipe, and the conveying pipe is communicated with the first fire extinguishing spraying head. The conveying pipe is used for supplying water to the first fire-fighting spraying head; the transmission mechanism comprises a lead screw, the lead screw is provided with a linear bearing, and the first fire-fighting spraying head is movably installed on the lead screw through the linear bearing in the axial direction of the lead screw; and the second fire-fighting spraying head is a hot melting spraying head, and the second fire-fighting spraying head is communicated with the