The invention discloses an automatic judging method, device and
system for the service life of a filter screen. According to the automatic judging method, device and
system, a
wind speed sensor is used for detecting the
wind speed change, the
fouling and blockage situations of the filter screen are judged according to the attenuation rate of the
wind speed, because an air conditioner fan has a fixed wind speed under each of different wind gears, the wind speed would be gradually reduced along with the dirtying and blockage of the filter screen, after the wind speed is reduced to a certain degree, different degrees of warnings are given to the user. Compared with the prior art, the automatic judging method, device and
system for the service life of the filter screen solve the dependency on air
quality level, do not need air quality detection cost and do not need the user to set manually according to the local air
quality level, and therefore, the problem of imprecision due to judging according to the air
quality level is solved, and moreover, the user does not need to manually set the air quality level and manually clear the accumulated time; the automatic judging method, device and system for the service life of the filter screen are more intelligent and more friendly to human and very convenient for the user.