Patent ID: 9476621
Filing Date: 2016-10-25
CPC Classification: B01D,F25B

Claim Text:
1. A device for cool drying a gas comprising: a cooling circuit that is closed, the cooling circuit being arranged to contain a coolant to be circulated in the cooling circuit; a compressor arranged to circulate a coolant in the cooling circuit, and in the direction of flow of the coolant successively, a condenser connected to an outlet of the compressor, an expansion device and an evaporator connected to an inlet of the compressor, said evaporator constituting a primary part of a heat exchanger, and having a secondary part through which the gas to be dried is guided; a bypass pipe fluidly connected to the cooling circuit that is closable by a bypass valve comprising a valve element that is movable to a normally closed position under the influence of a spring element and a pressure-sensitive element that acts on the valve element, said pressure sensitive element, via a distinct control pressure pipe, being exposed to a local control pressure in the cooling circuit where the control pressure pipe is connected to the cooling circuit; and wherein the control pressure pipe is connected to the cooling circuit upstream of the outlet of the evaporator.