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Freeze dryer

  • US 4,081,914 A
  • Filed: 08/25/1976
  • Issued: 04/04/1978
  • Est. Priority Date: 08/26/1975
  • Status: Expired due to Term
First Claim
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1. A freeze drier comprising housing means forming a sublimation chamber;

  • at least one heating plate in said sublimation chamber for heating a material to be freeze-dried therein;

    at least one ice condenser in said sublimation chamber;

    means for evacuating said sublimation chamber; and

    a hat pump for recovering heat from said ice condenser and recirculating same to said heating place, said ice condenser being provided with means for releasing deposited ice therefrom, the means for releasing ice from said ice condenser comprising a heating layer carried by said ice condenser and briefly heatable to release the ice therefrom.

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