Spellman XRV Sub-system, Руководство по установке, Страница: 30 / 98

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118157-001 Rev C
XRV Coolers and Chillers Overview:
Chillers may be used with either Unipolar or Bipolar X-ray tubes. The
tube power and ambient temperature will determine if a chiller is
required in order to cool the X-ray tube. Chillers are much like air
conditioners whereas a compressor lowers the temperature of the
water or oil within a closed loop system. Oil coolant is used with a
Bipolar tube since the Anode section of the X-ray tube “Floats” at
high voltage potential and an insulation medium must be used to
cool it and provide isolation to ground. An internal thermostat
maintains the temperature. It constantly compares the water/oil
that returns from the X-ray tube to the water/oil supplied to the X-
ray tube. If the difference is too great, the chiller will provide an
interlock signal (usually a dry contact switch) to shut down the high
voltage generator and prevent any damage to the X-ray tube.
Adequate clearance is necessary when installing a chiller to allow the
flow of air through the venting system.