Table Fan Png
Typical applications include climate control and personal thermal comfort (e. g. , an electric table or floor fan), vehicle and machinery cooling systems, ventilation, fume extraction, ... Read more winnowing (e. g. , separating chaff of cereal grains), removing dust (e. g. in a vacuum cleaner), drying (usually in combination with heat) and to provide draft for a fire. While fans are often used to cool people, they do not actually cool air (if anything, electric fans warm it slightly due to the warming of their motors), but work by evaporative cooling of sweat and increased heat convection into the surrounding air due to the airflow from the fans. Thus, fans may become ineffective at cooling the body if the surrounding air is near body temperature and contains high humidity. In addition to their utilitarian function, vintage or antique fans, and in particular electric fans manufactured from the late 19th century through the 1950s, have become a recognized collectible category; for example, in the U. S. A. there is the Antique Fan Collectors Association.Read less
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