Patent ID: 7193188

Claim:
A temperature control system in a thermal device, comprising: an electrical supply network, a frequency converter connected to the electrical supply network by a disconnecting device, a temperature sensor, resistance heating elements connected to an output of the frequency converter by a first contactor, a motor-driven cooling gas blower connected to the output of the frequency converter by a second contactor, a temperature controller on which a thermal process for the thermal device is programmed and which controls the frequency converter, wherein the frequency converter modulates effective voltage supplied to the resistance heating elements and supplied to the motor-driven cooling gas blower, wherein the output of the frequency converter is simultaneously connected through the first contactor to at least one heating system that includes the resistance heating elements, and through the second contactor to at least one cooling system that includes the blower and a blower 3-phases induction motor, and wherein the first and second contactors are controlled by the temperature controller.