Patent ID: 8683816

Claim:
A heat exchanger device that can deliver at least one pressurized dry gas stream that is cooled to an essentially constant temperature, comprising: a coil or a corresponding analogous pipe in which said at least one gas stream circulates, a functional part of the coil or the corresponding analogous pipe being immersed in a liquid fraction of a second gas; at least one container comprising a wall that delimits a chamber, the liquid fraction of the second gas being present in the chamber, at least a portion of the wall of the at least one container that delimits said chamber is in contact with a liquid fraction of a third gas, so as to constitute a condensation surface for the second gas, the at least one container being an airtight container that can contain the second pressurized gas, in that the condensation surface is dimensioned to allow absorption of a predetermined caloric power from the second pressurized gas that is contained in the chamber of said at least one container without a variation of the temperature and the pressure of said second gas of said at least one container; and controlled means for variable heating of a bath that is formed by the liquid fraction of resident gas in the container, wherein the total caloric power that is released in the second or resident gas which corresponds to the sum of the caloric powers provided by the circulating gas that is to be cooled and the means for variable heating, is constantly kept approximately equal to the predetermined caloric power, whereby the area of the condensation surface for the second resident gas is such that its caloric transfer capacity is slightly greater than a thermal output released by the first circulating gas under extreme operating conditions, in particular maximum flow rate, and whereby the means for heating always delivers heating power and said delivered heating power depends directly on a flow of the first circulating gas, a value of the heating power being maximum in the absence of any flow and being minimum at the maximum flow rate, thus always providing a control of the temperature and pressure conditions prevailing in each chamber containing the second gas.