Experimental Study for High Efficiency on R410A Scroll Compressor

2nd Report : Efficiency Improvement with New Oil Injection to Compression Chambers

Abstract

In scroll compressors, oil injection to the compression chambers reduces refrigerant leakage loss in the compression process, while causes the heating loss in the suction process. In the previous experimental study where the relationship between the oil flow rate to the compression chambers and the compressor performance was investigated, we reported that the present R410A scroll compressor can be operated at higher efficiency as decreasing the oil flow rate. Based on this experimental result, we adopted a new oil supply device, which is the intermittent oil supply mechanism installed in the orbiting scroll, thus improving the efficiency. We studied theoretical oil flow rate of this new device, and addressing that this mechanism has excellent characteristics in oil flow control. Then we provided appropriate oil flow rate for the compression chambers with this new oil supply device, thus achieving higher performance on the R410A scroll compressor.