2007-03-12 23:11:48 · 7 answers · asked by the xeno 1 in Science & Mathematics ➔ Engineering
A fan can be rotated in any direction-cw or ccw.
It depends upon the the type of vanes, whether they are forward curved vanes/backward curved vanes.Reversing the direction will reverse the direction of air flow.
For a table fan with backward curved vanes , the direction is clockwise from motor side to blow the air for the purpose it is meant.
Same rule is applicable for centrifugal fan and ceiling fan.
Direction depends upon the application.
If there is any thread joint in the fan system, then the type (left hand or right hand thread) of the thread should be selected so that it do not unthread, otherwise it will get opened up and causes damaged.
2007-03-13 02:34:02 · answer #1 · answered by Anonymous · 4⤊ 1⤋
Fan can be rotating in anti-clock wise or clock wise direction.
Fan is using a DC or AC motor with metal coil rotating around a magnetic core (like an transformer or inductor). The direction of the current flowing in the coil is the one that affect the direction of the rotation of the motor.
Different standard set by country/manufacturer/consumer demands.
For example, fan is usually clock wise while ventilation fan is anti clockwise. Though that is not a must. it varies
2007-03-12 23:18:02 · answer #2 · answered by lcm 1 · 1⤊ 1⤋
It is quite convenient to have some machines running anti-clockwise. It means that you can put a nomal screw thread on the end of the motor shaft and screw the rotating bit - e.g. fan blades - on to the end.
When the shaft is rotating, the screw is tightening up. If it was rotating clockwise it would tend to unscrew itself.
2007-03-12 23:45:00 · answer #3 · answered by lunchtime_browser 7 · 1⤊ 0⤋
There is no standard direction of rotation for fans.
2007-03-13 06:29:58 · answer #4 · answered by Bomba 7 · 0⤊ 1⤋
Try looking from the back.
2007-03-12 23:31:05 · answer #5 · answered by pseudospin 2 · 0⤊ 1⤋
it is simple change polarity of the fan
then it change its dir
2007-03-13 00:41:27 · answer #6 · answered by sarat 2 · 0⤊ 1⤋
manufacturer
2007-03-12 23:14:07 · answer #7 · answered by chi 4 · 0⤊ 1⤋