METHOD AND DEVICE FOR CONTROL OF COOLING SYSTEM; METHOD AND DEVICE FOR CONTROL OF CENTRIFUGAL COMPRESSOR

摘要

FIELD: control systems of air-conditioning systems. SUBSTANCE: overheat of cooling agent is maintained at first preset level when compressor is working at constant speed and is increased to second higher preset level when compressor is accelerated. System is also used for estimation of degree of wear of compressor through measurement and comparison of power supplied to compressor and degree of change in temperature or pressure of cooling agent in compressor between initial and subsequent periods; the system is also used for distinguishing wear of drive part from wear of part of compressor used for creating pressure. EFFECT: enhanced efficiency. 17 cl, 3 dwgu