초록 ▼

A portable apparatus and method for discharge of CO.sub.2 snow or a combination of CO.sub.2 and ice along a generally horizontal path over and onto a load within an elongated insulated container from one partially open end of the container toward the other closed end thereof and in a manner to form

A portable apparatus and method for discharge of CO.sub.2 snow or a combination of CO.sub.2 and ice along a generally horizontal path over and onto a load within an elongated insulated container from one partially open end of the container toward the other closed end thereof and in a manner to form either a blanket of CO.sub.2 snow or a blanket of ice over the load within the container. The apparatus includes a rectangular or cylindrical duct into which liquid CO.sub.2 is discharged adjacent one closed end for impact against the walls of the duct before exiting in a CO.sub.2 snow and gas stream from the opposite open end. A transverse manifold is mounted adjacent the open end to jet spray water feed to the manifold into contact with the CO.sub.2 stream at an acute angle, preferably about 15.degree..

대표청구항 ▼

[ What is claimed as new is as follows:] [1.] A portable apparatus for forming a blanket of ice and CO.sub.2 snow over an elongated load within an elongated container at least partially open at one end thereof, which comprises an elongated duct having a first closed end and a second open end, liquid

[ What is claimed as new is as follows:] [1.] A portable apparatus for forming a blanket of ice and CO.sub.2 snow over an elongated load within an elongated container at least partially open at one end thereof, which comprises an elongated duct having a first closed end and a second open end, liquid CO.sub.2 discharge structure in said closed end located generally centrally transversely therein and operative to discharge at least three generally equally angularly displaced spray jets of liquid CO.sub.2 therefrom toward and for impact with opposing inner surfaces of said duct and produce a CO.sub.2 stream exiting said duct open end and water spray discharge structure mounted adjacent said open end and operative to discharge spray jets of water outwardly therefrom along a path transverse to a first direction in which said open end opens and in a second direction generally paralleling said first direction such that said water spray jets merge with said CO.sub.2 stream exiting said duct open end.