Freeze dryer
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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Abstract
A freeze dryer for the freeze drying of, for example, comestible products such as fruit juices and coffee, comprises a sublimation chamber having a heating plate upon which the products are disposed and an ice condenser spaced from the heating plate and upon which the moisture driven out of the product sublimes in the form of ice. According to the invention between the heating place and the ice condenser a heat pump is disposed so that the heat transferred to the ice condenser is returned via the heat pump to the heating plate.
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Citations
6 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6)
- at least one heating plate in said sublimation chamber for heating a material to be freeze-dried therein;
Specification