The invention provides a low-resistance rainproof
noise reduction device for an air inlet. The device comprises an outer frame, a first sound absorption and insulation sheet, a
second sound absorptionand insulation sheet and third sound absorption and insulation sheets, wherein the first sound absorption and insulation sheet is detachably fixed on the inner upper part of the outer frame through fixing assemblies; the
second sound absorption and insulation sheet is fixed on the inner bottom of the outer frame; the third sound absorption and insulation sheets are detachably fixed in the outer frame through fixing assemblies and uniformly arranged between the first sound absorption and insulation sheet and the
second sound absorption and insulation sheet in a
gap mode; and the first sound absorption and insulation sheet and the third sound absorption and insulation sheets are designed to be in an arc shape. According to the low-resistance rainproof
noise reduction device for the air inlet, the sound absorption and insulation sheets of the device are arch, so that the size is reduced; a rainproof
shutter is not needed, a windward surface is a
metal non-perforated protective panel, sothat rain and
snow are prevented from entering; a
noise facing surface is a
metal perforated protective panel to absorb and consume
sound energy; flow guide circular arcs are arranged at the abrupt
change positions of
airflow, so that
local pressure loss is reduced; the sound absorption and insulation sheets adopt the fixing assemblies convenient to disassemble, thereby being convenient to disassemble, clean and replace; and under the condition that the
noise reduction amount is determined, the size can be effectively reduced, so that the pressure loss is reduced, and the disassembly and the
assembly are facilitated.