PRECOOLING CASE AND PRECOOLING METHOD USING THE PRECOOLING CASE

摘要

PURPOSE:To permit a number of through holes to be closed readily by a method wherein a case body is provided with a plurality of projections on the underside of its bottom part, the through holes for introducing cooling air are provided in the positions corresponding to the projections and the projections are fitted into the through holes to close the same when precooling cases are piled up straight. CONSTITUTION:A case body 11 is the square container having four square pillar-shaped projections 13 on the underside of its bottom part. A lid 12 has four square through holes 14 for introducing cooling air in the positions corresponding to the projections 13. When a plurality of precooling cases with lid 12 are piled up straight, the projections 13 of the case body 11 directly above are fitted into the through holes 14 of the lid 12 directly below, so that the through holes 14 are closed. By merely stacking such precooling cases in a straight and orderly manner, a number of through holes 14 can be closed readily with the projections 13, leading to an extremely high operational efficiency.