| 摘要 |
<p>A freezer (1) comprising a tunnel (6) having an inlet (2) and an outlet (12), a passage (11) surrounding said tunnel, a perforate conveyor (3) extending along said tunnel (6) for carrying shredded material from the inlet to the outlet of said tunnel (6), a spray (5) adjacent said outlet for introducing a cryogenic fluid into said tunnel, and at least one fan (7) between said inlet and said outlet for withdrawing gas from said tunnel into said passage and blowing said gas around said passage and through said perforate conveyor back into said tunnel (Fig. 2, not shown), is characterized in that a baffle (20) is provided in said passage (11) between said spray (5) and said fan (7) to inhibit said fan blowing gas into that part of said passage which surrounds said spray and further characterized in that at least one flexible multifingered curtain (25, 26) is provided at the outlet of said tunnel to inhibit the passage of gas through the outlet (12). <IMAGE></p> |
