FIELD: power engineering. SUBSTANCE: proposed fan contains end diffuser with tongue. End edge of tongue has the form of broken line consisting of at least three straight sections. One of sections is arranged opposite to impeller at angle to impeller axis. Two remaining extreme sections adjoin housing, being parallel to impeller axis. Extreme sections are located on one straight line. EFFECT: reduced noise level, increased efficiency of centrifugal fan. 3 cl, 4 dwg
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