Design, construction, and calibration of an instrumented test coil for calibrating a torch autobrazer.

摘要

Heat exchanger coils used in air conditioning systems are mass produced on a conveyor line in which the coil array is transported through the flames of an autobrazer which melts the brazing rings to seal the joints. Variations in the temperature and temperature distribution in the autobrazer will influence the quality of the brazed joints. The objective of this project is to design, construct, and calibrate two reusable instrumented test coils for use in the calibration of an industrial torch autobrazer. The instrumented coils are to measure the actual temperature profile of the heating, brazing, and cooling processes that act upon the array of coils being brazed. The autobrazer will then be calibrated to reproduce optimal temperature profiles leading to "zero leakage" coil joints and higher brazing quality.