Its a Zanussi (Electrolux) Fridge Freezer I think...
I don't understand "conveyor" but most modern fridges have an auto defrost feature - a timer stops the cooling process and quickly heats the cooling system to melt any ice that's formed inside - the ice melts and the water runs out through a drain hole.
It might be this...
See...
http://home.howstuffworks.com/question144.htm
Peccavi, October 2009
