Electromechanical analysis method or monitoring recirculated steam and gas mixture treating foods in e.g. oven, comprises measuring slip of asynchronous fan motor under controlled conditions

摘要

An asynchronous motor is used as the recirculation drive. Its slip, i.e. the deficit below synchronous speed, is measured. This is a measure of the proportion of the gas component of interest, e.g. steam, under given conditions of pressure and temperature of the gas mixture. Preferred Features: The measured slip is used to control the composition of the gas mixture, especially for moisture control of the medium recirculated in equipment treating foods.