Ultra low temperature freezer for biobanks with backup cooling system

11 August 2010

Italian company Desmon S.p.A has launched a range of ultra-low temperature freezers specially developed for biological banks.

The models are intended for long-term storage of valuable biological material and equipped with two completely independent refrigerating units with alternating operation and fully automatic administration.

The range includes three upright models with internal volumes of 354, 505 and 604 litres and regulated working temperature within a range of -40/-85°С. Each model is equipped with two independent cooling systems (4 compressors+2 evaporators).

Each system is managed by its own microprocessor controller. If one system fails, a controller warns a user about a failure by virtue of audiovisual signal and then stops a damaged system. The second system is turned on immediately in order to maintain an internal temperature.

Diagram of the cooling system

While the second system is working it is possible to fix the first one. By default both systems are programmed for alternating operation (one is working, another is reserved) but it is possible to re-program them for simultaneous operation.

The company says that in case of long blackout periods optional CO2 or LN2 backup systems should be installed.


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