REFRIGERATING MACHINE EVAPORATOR AUTOMATIC FILLING CONTROL SYSTEM Russian patent published in 1997 - IPC

FIELD: automatic systems for supply of evaporators and protection of vessels and apparatus, capacity of 100,000 kcal/h and higher, mainly for ammonia cold production plants. SUBSTANCE: system includes evaporator with equalizing column or any other vessel containing vapor-and-liquid phase of cooling agent, level converter, transfer mechanism and actuating member. Level converter is made in form of thermometric valve connected with thermal bulb by means of pulse tube; thermal bulb is fitted on equalizing column at height of preset level of cooling agent in evaporator. Transfer mechanism includes compressed air supply line of diaphragm mechanism of pneumatic control valve and working member of thermal control valve fitted in line discharging the compressed air from diaphragm chamber of pneumatic valve. Pneumatic control valve is used as actuating member for supply of cooling agent to evaporator. EFFECT: enhanced efficiency. 1 dwg