Abstract: A drying device for drying a gas comprises parallel cooling branches, at least one of which is in its active state at any given time. A gas-coolant heat exchanger arranged in each of the cooling branches has 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. The drying device further comprises an ambient-air input line, an ambient-air output line and an ambient-air conveyor. 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 the switching device and the ambient-air conveyor conveys ambient air through the first channel of the gas-coolant heat exchanger arranged in this cooling branch.

Abstract: A drying device for drying a gas comprises parallel cooling branches, at least one of which is in its active state at any given time. A gas-coolant heat exchanger arranged in each of the cooling branches has 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. The drying device further comprises an ambient-air input line, an ambient-air output line and an ambient-air conveyor. 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 the switching device and the ambient-air conveyor conveys ambient air through the first channel of the gas-coolant heat exchanger arranged in this cooling branch.