| A conventional radiator arrangement for cooling
of a motor in a vehicle comprises a radiator fan, which provides
an axial airflow through a radiator mounted behind the radiator
fan. However, an axial fan provides an airflow within an area having
a substantially circular extension in a plane perpendicular to an
axial flow direction. Since conventional radiators are substantially
quadrangular , the airflow in the corners of the radiators is very
low. Consequently, the heat transferring surfaces in the corners
of a conventional radiator do not provide an effective cooling of
a coolant, flowing in the radiator.
A high performance radiator fan includes an axial
fan and a centrifugal fan. The axial fan has a plurality of arched-shaped
blades located between a protrusive circular hub and a closed motor
shell for drawing airflow from the upper end of the axial fan through
the curved blades into the centrifugal fan. The airflow is converged
and spun out at high speed and great volume by centrifugal force
to enhance heat dissipation efficiency
The object of the invention is to provide a radiator
arrangement in which substantially all heat transferring surfaces
of the radiator provide an effective cooling of the coolant flowing
in the radiator. According to the invention, the radiator arrangement
comprises a radiator fan, which provides a radial airflow and a
radiator having an annular extension around the periphery of the
radial radiator fan. The radial radiator fan provides a substantially
uniform airflow in all radial direction through the annular radiator.
Thereby, the coolant obtains an effective cooling at substantially
all heat transferring surfaces of the annular radiator. Consequently,
such an annular radiator requires a smaller space than a conventional
quadrangular radiator having the same cooling capacity
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