Patent ID: 6389828
Filing Date: 2002-05-21
Classification: B29C,F25D

Abstract:
A method of cooling an article comprising:a. introducing liquid cryogen into a feed chamber wherein said liquid cryogen is substantially vaporized; b. circulating said vaporized cryogen from said feed chamber into a separate cooling chamber containing said article to be cooled; c. circulating said vaporized cryogen at a controllable velocity from said feed chamber into said cooling chamber and around said article to create a wind chill temperature in said cooling chamber to increase a rate of cooling of said article; d. sensing the temperature in at least one of said feed chamber and said cooling chamber; e. calculating said wind chill temperature in said cooling chamber, said wind chill temperature being a function of the temperature in said cooling chamber and the velocity at which said vaporized cryogen is circulated through said cooling chamber over said article; and f. controlling said velocity to cause said wind chill temperature to correspond to a desired wind chill temperature.