Instant spray type fire extinguisher

The invention relates to an injection extinguishing device, built in large building. Wherein, said device comprises upright axle, base, water diverter, blades and fire detector; the lower parts of upright axle and base are through to the water divider and blades via support; the sharp of upper end of divider is opposite to the center of upright axle, while the lower part is connected to blades; the lower frame has fire detector formed by infrared sensor and ultraviolet sensor. The invention can real-time detect under space, and extinguish fire on time, with low cost and large water injection area.