Microprocessor controlled controller for hot air massage bath - uses coding wheels to allow control sequence to be stored then executed by microprocessor circuit

摘要

A microprocessor provides a programming facility for a massage unit comprising a bath with nozzles which direct warmed air onto the user. The air is driven by a fan, past an ozone lamp and a heating resistance. Over-temp. protection is provided by thermostats in the air outlet. Six control buttons placed near the bath, are pneumatically coupled to the electronic controller to provide switching while maintaining electrical isolation for operator safety. The user can program in the operating sequence, and display lamps show the operating status of the heater, ozone lamp, and fan while another numeric display shows the speed of the fan, giving an indication of the force of the air stream. The timing of the operations sequence is set using coding wheels. The entered program is stored in microprocessor memory then executed when required.