Refrigeration – Using electrical or magnetic effect – Thermoelectric; e.g. – peltier effect
Patent
1982-10-19
1985-01-01
King, Lloyd L.
Refrigeration
Using electrical or magnetic effect
Thermoelectric; e.g., peltier effect
F25B 2102
Patent
active
044909829
ABSTRACT:
For the controlled cooling of specimens which are at least partially of liquid form, especially biological specimens, it is important that crystallization at the freezing point takes place locally, without supercooling, and preferably with absorption of the latent heat of fusion. A cooling device which comprises at least one module which operates in accordance with the Peltier effect, with the "cold" faces of the modules connected by a conductive metal strip, has the specimen container in contact with the strip. The device is mounted in a working chamber which has its temperature/time profile controlled. At a temperature which is a predetermined amount above a given critical temperature for the specimen, e.g. its freezing point, the Peltier effect modules are energized to effect supplementary cooling at a local area, for example one end of the specimen.
REFERENCES:
patent: 3436924 (1969-04-01), Lawless
patent: 4066365 (1978-01-01), Staunton
patent: 4248259 (1981-02-01), Kaartinen et al.
patent: 4361011 (1982-11-01), Callender et al.
King Lloyd L.
Planer Products Limited
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