| 摘要 |
A food freezer having a thermally insulated enclosure and an endless conveyor having a loading section, a food freezing section and an unloading section. Blowers circulate gas throughout the interior of the enclosure, and devices for injecting liquid CO2 to preferably cause CO2 snow particles to impinge upon the food products on the belt are located at selected positions about the belt and may be at various vertical levels, some of which are preferably at least slightly above the belt. By piping the liquid CO2 so that it flows only upward and/or horizontally toward the spray nozzles within the thermally insulated enclosure, any solid CO2 that may accumulate adjacent the upstream side of the spray nozzle orifices is melted by CO2 vapor which gravitates upward in the vertical piping.
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