| 摘要 |
Food products are frozen or cooled within a housing chamber (20) defined by side walls (23, 24) between an ceiling (21) and floor (22) and having a cryogen supply, a food products conveyor (38) extending into the chamber disposed between the ceiling and floor, by transporting the food products on the conveyor, the chamber containing at least one impingement hood (10) disposed above the conveyor; the impingement hood including a shell (42) including a top (43), opposed edges (44, 45, 46, 47) and opposed side walls (48, 49, 50, 51) supporting an impinger (13) containing openings. Gas and solid or liquid cryogen are mixed within the impingement jets (11) of the mixture are directed through an impingement plate (60) onto the food products transported on the conveyor.
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