Patent ID: 7040100

Claim:
A low-temperature dryer, especially compressed air low-temperature dryer, for drying of a gaseous working fluid with cooling of a gaseous working fluid by use of a refrigerant, comprising: a pre-heat exchanger section and a main heat exchanger section, in which the pre-heat exchanger section and/or the main heat exchanger section comprises at least a preferably elongated heat exchanger element, in which cooling of the working fluid sent to the low-temperature dryer occurs in the pre-heat exchanger section from the dried and cooled working fluid in the countercurrent principle, in which additional cooling of the precooled working fluid introduced to the low-temperature dryer occurs in the main heat exchanger section from the refrigerant, so that moisture is condensed from the working fluid, in which all flow channels of the pre-heat exchanger section and/or the main heat exchanger section are designed essentially by hollow chamber profiles with a number of heat guide channels and cold guide channels, in which the at least one heat exchanger element of the pre-heat exchanger section and/or the main heat exchanger is secured and connected fluid-tight on the end in a connection profile, in which the heat exchanger element is designed as a preferably elongated tube profile and the heat guide channels and cold guide channels extend along the tube profile, and in which the heat guide channels and the cold guide channels are separated from each other by partitions ( 27 ) integrated along the tube profile.