(57) A heat exchanging apparatus is disclosed which includes a heat exchanging reservoir
(1) for containing a heat dissipating bath fluid (F) therein, a heat convecting unit
(2) including a fluid pathway for flowing a perfusate (E) therethrough, and an immersion
adjusting mechanism (3,6) attached to at least one or both of the heat convecting
unit (2) and the heat exchanging reservoir (1). The heat convecting unit (2) is accommodated
in the heat exchanging reservoir (1) so as to be immersed in the bath fluid (F) at
a prescribed extent of immersion. The immersion adjusting mechanism (3,6) is constructed
to control the extent of immersion of the heat convecting unit (2) in the bath fluid
(F). Changing the effective heat convecting surface area, i.e., the extent of immersion
of the heat convecting unit (2) in the bath fluid (F) by the immersion adjusting means
(3,6) will afford ready and easy control of the effluent (E) temperature, with minimal
time lag, over a wide range of temperatures, without ever changing the bath fluid
temperature to a new one.
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