Appeal No. 2000-1335
Application 09/131,930
quantities of fluid such as dry air by inducing turbulence
therein. The apparatus 2 includes a heat exchanger
flowpassage 10 disposed in a vessel 3 where it is subjected to
an external flow of
refrigerant (e.g., liquefied nitrogen, oxygen, argon and the
like) passing through the vessel. Tubes 11 and 12 supply and
discharge the dry air to and from the flowpassage. As
described by Nomura,
flowpassage 10 is composed of annular tubes 18
communicated in a circumferential direction which
constitute peripheral flowpassages, communicating
tubes 19 which constitute communicating
flowpassages, a tank 20 on the supply port side, a
tank 21 on the discharge port side, and the like, as
shown in FIG. 1. Plural rows (5 rows in the
illustrated embodiment) of the annular tubes 18 are
arranged in a parallel state so as to have a desired
spacing in a vertical direction around a vertical
axis. The annular tubes 18 adjacent to each other
are communicated at plural locations by the
communicating tubes 19 in a vertical direction. The
communicating tubes 19 in each of upper and lower
rows are arranged substantially at equal intervals
while being alternately deviated in a peripheral
direction to each other so that the positions of an
inlet and an outlet at the annular tube 18 in each
row are alternately deviated in a peripheral
direction, the inlet and the outlet being set so
that the inlet and the outlet are not opposed on a
straight line. The tank 20 on the supply port side
and the tank 21 on the discharge port side are
arranged on the lower inside and on the upper inside
of the plural rows of the annular tubes 18. The
tank 20 on the supply port side is communicated in
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