Patent ID: 8772681
Filing Date: 2014-07-08
Classification: B22F,F24D,F24H,H05K

Abstract:
1. A system for outputting heated air at a controlled temperature and flow rate, comprising: an inlet and an outlet; an electric air blower for urging a flow of air; an electric air heater including an electric resistance element upstream of the outlet; a conduit for conducting air from said electric blower to the electric heater; a mass flow sensor connected upstream of an input of the electric air blower in a direction opposite the flow of air for generating a mass flow measurement signal MassFlow; a temperature sensor connected to an inlet of the electric air heater for generating an input temperature signal Temp IN representing an input temperature; a heater power control circuit for controlling electric power to said electric air heater in response to a first control signal; means for controlling mass flow through said electric air heater in response to a second control signal; and a controller receiving the mass flow measurement signal MassFlow and the input temperature signal Temp and generating said first and second control signals, wherein the temperature sensor is arranged at the inlet of said electric air heater for generating said input temperature signal Temp IN .