Refrigeration – Processes – Deodorizing – antisepticizing or providing special atmosphere
Patent
1991-02-04
1992-12-22
Capossela, Ronald C.
Refrigeration
Processes
Deodorizing, antisepticizing or providing special atmosphere
62 502, 426418, F24F 316
Patent
active
051725584
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a refrigerated container, in particular a refrigerated container for the transportation, respectively, storage of goods into which in particular in order to maintain the composition of the atmosphere, nitrogen is delivered which is carried in liquid form in containers with the refrigerated container, at least one cooling system being provided to cool the atmosphere of the refrigerated container. Further, the invention relates to a cooling process for refrigerated containers, in particular refrigerated containers for transporting, respectively, storing goods, into which, in particular, in order to maintain the atmospheric composition nitrogen is delivered, this nitrogen being carried in containers in liquid form with the refrigerated container, the atmosphere of the refrigerated container being cooled by means of at least one cooling system.
An arrangement of the described kind is known, for example, in the AU-PS 27731/07. This arrangement, however, does not show adequate measures for cooling in an energy- and gas saving, respectively, ware-protecting manner.
It is the object of the invention to ensure that, in refrigerated containers of this kind, a most even atmospheric composition at a most even temperature for the longest possible period of time can be maintained; particularly, the storage time is to be increased when the goods stored in the refrigerated container are of higher quality. Such refrigerated containers are, in particular, thought to be constructed as superstructures on trucks or rail cars, or to be loaded on ships and transported therewith. Such refrigerated containers are used in particular for transporting perishable goods, such as food stuffs, flowers, meat, vegetables, fruit, but also for chemicals, pharmaceutical preparations and other goods that require a specific atmospheric composition and/or temperature when being transported.
According to the invention a refrigerated container of the initially mentioned kind is characterized in that the atmosphere is circulated via the cooling system during periods of time determined by a control system by means of at least one blower means and that at least one means for heating the nitrogen before its introduction into the cooling room of the refrigerated container is provided, with which means the nitrogen can be heated to a temperature that substantially corresponds to the temperature in the cool room, preferably is only somewhat lower than this. A process of the initially described kind is according to the invention characterized in that the atmosphere is circulated during predetermined periods of time for cooling, and that the nitrogen is heated before it is fed into the cool room of the refrigerated container to a temperature corresponding substantially to the temperature in the cool room, preferably is only slightly lower than that.
The blower means for circulating the atmosphere in the interior of the container is a blower which is normally switched off and can be switched on by the control means at arbitrarily determined time intervals or at time intervals determined by specific parameter values inside, respectively, outside the container, particularly the temperature and/or the humidity (relative air humidity) for a predetermined period of function time or for a period of function time that is dependent from the parameter values.
By the arrangement according to the invention, respectively, by the inventive process it is ensured that the nitrogen that is introduced in order to adjust the atmospheric composition can be delivered into the cool room at a temperature that essentially corresponds to the temperature within the cool room, respectively, is approximately no more than 5% lower. Thereby it is avoided that goods are destroyed because of cold damage caused by introducing nitrogen at too low temperature. The transportation of the nitrogen in liquid form within containers is selected because this form of carrying the nitrogen along ensures a greatest possible supply of nitrogen, compared with a storage of the n
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Russ Werner
Wassibauer Rudiger
Capossela Ronald C.
Franz Welz Internationale Transporte GmbH
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