Vitronics Soltec XPM3m, Техническое справочное руководство

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Technical Reference Manual-XPM3m Revision Date: August 2014
CONTROLLED EXHAUST SYSTEM (AIR ONLY OR OVENS EQUIPPED WITH AIR SWITCHING)
CONTROLLED EXHAUST SYSTEM (CES) (Air Mode)
This exhaust subsystem extracts heated gas directly from the oven chamber between the last heating zone and the
first cooling zone, minimizing the amount of heat and flux entering the cooling section of the oven. The result is
product cooling improvement and maintenance reduction in the Air Mode. It generates a controllable, positive
exhaust flow and does not depend on the facility exhaust for its operation.
A small amount of compressed air flows through a Venturi (mounted inside the Controlled Exhaust Tube ) and
creates a negative pressure at the CES slot in the oven chamber. This draws gas out of the Oven Chamber. The
oven chamber exhaust flow rate is controlled by the amount of air supplied to the oven.
The cooling effect of the incoming compressed air causes an accumulation of flux condensate in the exhaust nozzle.
The nozzle requires periodic cleaning
.
INDIVIDUAL CELL INLETS
The “makeup” gas to replace the exhaust flow is supplied by the gas intakes of the individual Zones (cells).
Additional “makeup” enters the oven chambers at the “onload” and “offload” openings.
The CES system is not used with N2 to minimize nitrogen consumption.