METHOD FOR PROTECTING TUBULAR ELECTRIC HEATERS AGAINST OVERHEATING IN GALVANIC BATH Russian patent published in 1995 - IPC

FIELD: galvanic production. SUBSTANCE: method involves maintaining working value and controlling emergency value of liquid level in bath; switching off tubular electric heater from voltage source, when this value is provided; providing supplementary control of preemergency liquid level of h_pr; detecting the moment of initial discharge of device with parts from bath; determining variation of liquid level of hdisliq

^ch in the process of control till hdisliq^ch< h_pr state is reached and switching off tubular electric heater from power source; detecting the moment or time of complete exit of device with parts from bath; controlling the state of liquid level in bath and connecting electric heater in case hdisliq^ch exceeds h_ex value. The method is characterized by new value of working level of liquid and additional control of replenishment time of liquid level in bath and regulating on the basis of control, the process of switching off electric heater from power source. EFFECT: increased efficiency in protecting tubular electric heater against overheating and efficient heating of liquid medium in bath. 2 cl, 2 dwg