초록 ▼

The cargo area of a refrigerated railroad car is cooled by convectors positioned along the upper side and walls of the cargo side and end walls of the cargo compartment of the car. The convectors are cooled by a supply of carbon dioxide snow in a bunker above the cargo compartment. Alternately, vent

The cargo area of a refrigerated railroad car is cooled by convectors positioned along the upper side and walls of the cargo side and end walls of the cargo compartment of the car. The convectors are cooled by a supply of carbon dioxide snow in a bunker above the cargo compartment. Alternately, vents between the bunker and the cargo compartment and along the upper side and end walls of the cargo compartment enhance and direct carbon dioxide vapor circulation between the cargo area and the bunker. The convectors and the vents can be used independently or in combination.

대표청구항 ▼

[ I claim:] [1.] In an insulated railroad car or other cargo container having an internal cargo volume of at least 600 cubic feet, for maintaining cargo in a refrigerated condition by the use of carbon dioxide as an expendable refrigerant, the car or container having a top, a pair of opposed side wa

[ I claim:] [1.] In an insulated railroad car or other cargo container having an internal cargo volume of at least 600 cubic feet, for maintaining cargo in a refrigerated condition by the use of carbon dioxide as an expendable refrigerant, the car or container having a top, a pair of opposed side walls, a pair of opposed end walls, a bottom and a bunker having a floor and a vent(s) for carbon dioxide vapor, the bunker positioned beneath the top and above a cargo volume, a manifold pipe positioned so as to provide a supply of carbon dioxide snow on the floor of the bunker, the bunker floor providing at least in part a ceiling for the cargo volume, the improvement comprising an area of heat conductive material as the upper surface of the bunker floor to be maintained at a near uniform temperature by contact with the carbon dioxide snow in the bunker, one or more convectors located in or near the ceiling of the cargo volume and near to the side and or side and end walls of the car or container, said heat conducting material to be in direct thermal communication with both the carbon dioxide snow in the bunker and the convectors, a layer of insulation in the bunker floor between the heat conductive material and the cargo volume leaving the convectors exposed, whereby the cargo is uniformly maintained in a refrigerated condition by heat exchange between vapor in the cargo volume and the convectors.