OIL LEVEL DETECTING APPARATUS AND CONTROL METHOD THEREOF, OIL FLOW DETECTING APPARATUS AND CONTROL METHOD THEREOF, METHOD FOR CONTROL OIL RETURN USING OIL LEVEL AND OIL FLOW

摘要

The present invention proposes an oil level detection apparatus and a control method therefor, an oil flow detection apparatus and a control method thereof, and an oil recovery operation control method using the oil level and oil flow detection results. The oil level in the compressor is measured at two or more points, and the frequency comparison method using two electrodes can detect the condition of oil and refrigerant in the compressor and the level of oil even in mixed oil. It is possible to actively control the oil return control by determining whether can do. In addition, it is possible to adjust the oil level in the compressor and control the oil recovery operation by using the oil level detection and oil flow detection results.