Device for freezing biological products

Details Device for freezing biological products Device for freezing biological products

1983-07-05

1984-12-04

Capossela, Ronald C.

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

62 78, 62407, 62414, 62419, F25B 1900

Patent

active

044856415

ABSTRACT:
A freezing device for biological products comprises an impeller arranged at the top of a sleeve located above a basin of liquid nitrogen. The impeller causes a rising flow of nitrogen vapors within the sleeve and a descending flow outside it, the impeller and sleeve being arranged within a casing. When cooling is completed, the sleeve is lowered into the basin of liquid nitrogen. The invention is applied to the freezing of biological products stored in tubes, ampoules, phials, or straws arranged at the base of the sleeve.

REFERENCES:
patent: 3442091 (1969-05-01), Klipping et al.
patent: 3902657 (1975-09-01), Baron
patent: 4304293 (1981-12-01), Scheiwe et al.
patent: 4314450 (1982-02-01), Pelloux-Gervais
patent: 4386504 (1983-07-01), Brautigam

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