CONTROLLER UNIT FOR CONTROLLING SPEED OF ENGINE WHICH DRIVES COMPRESSOR WITH OIL INJECTION, AND METHOD OF CONTROLLING SAID SPEED Russian patent published in 2020 - IPC F04C28/08 F04C28/28 F04B49/06 F04B49/20 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used to control engine speed for compressor with oil injection. In particular, a controller unit for controlling engine speed for compressor with oil injection drive is disclosed. Said controller unit (9) comprises: information connection (12, 13, 14) for data transmission; first module (17) configured to receive data through said information connection (12, 13, 14), wherein controller unit (9) also comprises: data processing unit (18) for determining the minimum operating speed (rpm_min) of engine (3) based on the measured operating pressure (p_w), ambient temperature (T_ambient) and temperature (T_{dew point}) of the dew point; and comparator unit (19) configured to compare said defined minimum operating speed (rpm_min) with engine rpm (rpm) obtained; said data processing unit (18) further comprises signal generation unit (20) configured to transmit a signal to said engine (3) to increase engine (3) operating speed (rpm) to at least said predetermined minimum operating speed (rpm_min), if said obtained operating speed (rpm) is lower than said defined minimum operating speed (rpm_min).

EFFECT: increased efficiency of compressor drive speed control with simultaneous increase of compressor and its components service life due to reduction or exclusion of condensate formation inside the compressor.

20 cl, 2 dwg