NEW TYPE OF HEATING SYSTEM FOR CLOTHES DRYER Stress Analysis and Reliability Test for Semlconductive Honeycomb Heater

摘要

The basic technology to improve serviceability and reliability of the electric clothes dryer relies on the heater and heat exchanger. This paper describes the status of stress analysis and the evaluation of reliability for semiconductors consisting of BaTiO{sub}3 for disk-type heat exchangers/heaters with honeycomb openings. If we could keep the Curie temperature of the semiconductor lower than the ignition temperature of clothing during the drying cycle, installation of two legally limited thermostats would no longer be required and reliability of the control system could be further improved due to its simplified structure. The heater can be made more compact by designing a honeycomb-type heater/heat exchangers but the structural requirements for the heat exchanger and the beater would conflict. An approximate solution to heater/heat exchanger stress is being sought as a thermal stress issue for an equivalent solid compound disc.