Efficient multi-air-outlet energy-saving explosion-proof fan

The utility model relates to an efficient multi-air-outlet energy-saving explosion-proof fan which comprises a volute casing (1), an impeller (2) and an electromotor (3), wherein the volute casing comprises an air inlet device (11), a front side plate (12), a wind tongue (13) and a rear side plate (14), the wind tongue (13) is connected between the inner edge of the front side plate (12) and the outer edge of the rear side plate (14); a flat plate wind tongue or a curved surface plate wind tongue is adopted for the wind tongue (13); the front side plate (12), the rear side plate (14) and the wind tongue (13) are coupled into a hollow circular cylinder or a hollow multilateral body; a back tilting impeller is adopted for the impeller; the impeller (2) comprises a front tray (21), blades (22), a rear tray (23) and a wheel hub (24), and is connected between the front tray (21) and the rear tray (23); two single-plate arc blades are adopted for the blades (22), wherein the two arc blades respectively comprise a f