AUTOMATIC CONTROL AND REGULATION SYSTEM FOR VENTILATION PLANTS Russian patent published in 1997 - IPC

FIELD: ventilation systems. SUBSTANCE: system includes plenum air fan and circulating air fan; each fan is provided with its own electric motor and magnetic starter, temperature sensors for check of ambient air medium and circulating hear-transfer agent of calorifier which are connected to temperature regulator. Inputs of contactless logic unit are connected with after-calorifier air temperature sensor and temperature regulator outputs. One output is connected to electric motor of plenum air fan via magnetic starter and to actuating mechanism of outside air valve; other output is connected to actuating mechanism of circulating heat- transfer agent valve. System includes also recirculating and exhaust air valves with actuating mechanisms, remote control unit and timer. Inputs of remote control unit are connected to starting device; outputs are connected with contactless logic unit via timer. Third output of logic unit is connected to recirculating air fan electric motor via magnetic starter. Third output is also connected to actuating mechanisms of recirculating and exhaust air valves. EFFECT: control of several electric motors; possibility to connected system to dispatching control; reduction of starting currents; enhanced reliability. 1 dwg