FIELD: oil cooling systems and apparatus. SUBSTANCE: oil cooling temperature control within preset working range is effected through change of flow rate of cooling air. Cooling air flow is fed by fan equipped with AC electric drive to surface of recuperative heat exchanger. Air flow rate is changed through change of fan speed. Temperature of oil being cooled is measured and its magnitude is transmitted to modulator by means of electric connections. In case of deviation from preset range, modulator changes frequency of alternating current supplied to fan electric drive. EFFECT: smooth temperature control; enhanced economical efficiency and durability of equipment. 12 cl, 6 dwg
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