QUOTE(iamsobloodysick @ Dec 3 2011, 03:22 PM)
from 12am to 6am (or earlier depends when is the last time to open the fridge), the inverter fridge maintains at below 2k RPM whereby non-inverter fridge maintain at 3k or above RPM at all day.
if u can understand how the inverter aircond works, the story is same on inverter fridge.
Take car as an analogue. In situation whereby there are lots of stop-start (as in town driving), it uses more fuel. On highway with very few speed variation and no stop-start, it uses less fuel. Invertor works on similar principle.
Take the case of non-Invertor fridge. If coldness has been achieved, normal motor has to stop completely. And when temperature rises, the motor has to restart from scratch.
Now with Invertor fridge. When coldness has been achieved, the motor doesn't stop, it merely slows down. When temperature rises, the motor doesn't has to restart from scratch but merely speeds up.
Invertor works on DC current. So AC current has to be converted to DC current and there is a power lost of 10% when doing so. So in situation whereby the motor has to be continuously running, then Invertor motor actually uses more power. For example. Putting a tiny air conditioner in a huge room.
That's how I understand it.