Patent ID: 7185447
Filing Date: 2007-03-06
Classification: F26B,Y02P

Abstract:
1. A drying device for drying a gas, comprising: a gas input line for supplying the gas to be dried; a gas output line for discharging the dried gas; parallel cooling branches which can be switched by a switching device between an active state, in which the gas to be dried flows through the cooling branch and cold-drying of the gas is carried out in the cooling branch, and a passive state; wherein at least one of the cooling branches is in its active state at a given time; and a gas-coolant heat exchanger being arranged in each of the cooling branches having a first channel through which the gas to be dried flows in the active state of this cooling branch and a second channel which, in the active state of this cooling branch, forms an evaporator for a coolant circulating in at least one coolant circuit; an ambient-air input line; an ambient-air output line; and an ambient-air conveyor; wherein in the passive state of a respective cooling branch the ambient-air input line and the ambient-air output line are connected, at least for a time, with this cooling branch by said switching device; and said ambient-air conveyor conveying ambient air through the first channel of the gas-coolant heat exchanger arranged in this cooling branch.