Procedure for creating an inert gas atmosphere with constant composition of nitrogen and carbon dioxide in a refrigerated container

Claim 1

In a process for creating an inert gas atmosphere having a constant composition of nitrogen and carbon dioxide in a refrigerated container equipped with an engine and a refrigerator, the atmosphere having a low oxygen content which is maintained by means of an oxygen limit value control, the nitrogen being led into the interior of the refrigerated container from at least one storage tank for liquid nitrogen which is connected with the refrigerated container, the carbon dioxide being led into the interior off the refrigerated container from at least one gas bottle which is connected with the refrigerated container, the nitrogen and carbon dioxide being supplied when the predetermined oxygen limit value is exceeded; the improvement being that while the inert gases are being supplied, a constant flow of cold, gaseous nitrogen is produced by means of an electrical evaporator located in the storage tank for liquid nitrogen and connected to the generator of the engine, simultaneously with the production of the gaseous nitrogen also removing carbon dioxide from the gas bottle, and heating and releasing the carbon dioxide at a constant pressure and feeding the carbon dioxide into the refrigerated container via at least one throttle point from a parallel-switched group of such throttle points which can be individually activated.