Patent ID: 8303728

Claim:
A pass-through dishwasher for cleaning items to be washed, comprising: at least one washing zone; at least one rinsing zone; a drying zone having at least one fan and an air-deflection trough positioned to deflect a jet of air from said fan; a conveyor device for conveying the items to be washed through the pass-through dishwasher in a conveying direction; sensors for detecting air streams which are discharged from the drying zone and are directed in or counter to the conveying direction of the items to be washed; and a controller for controlling the rotational speed of the at least one fan based on an output from the sensors, wherein the controller is configured to decrease the fan speed from a first speed to a second speed less than said first speed when the sensors detect a blockage of a path from said fan to said air-deflection trough.