The present invention is a tunnel freezer which incorporates a "dual flow" design whereby the refrigerant is introduced at each end of the tunnel and withdrawn from the middle of the tunnel. A key to the present invention is that the dual flow design allows one to confine the pressure gradient for leaks between the ends of the tunnel where it will not be a concern since the item entrance and exit ports (which ports provide a ready access for leaks) are located at the ends of the tunnel.
申请公布号
US5517827(A)
申请公布日期
1996.05.21
申请号
US19940333172
申请日期
1994.11.02
申请人
AIR PRODUCTS AND CHEMICALS INC.
发明人
KICZEK, EDWARD F.;COHEN, JOSEPH P.;KLEE, DAVID J.;SHAW, ROBERT J.