Study on New Oil Distribution Mechanism to Suction Chamber and Compression Chamber of Scroll Compressor

Abstract

The annual energy consumption of air conditioners has been a topic of interest in the air conditioning industry. Improving the annual performance factor (APF), which indicates the energy efficiency at rated, half-load and minimum-load cooling and heating conditions, is therefore required. To achieve this, a high efficiency compressor that operates at half-load and minimum-load conditions is necessary because compressors account for most of the energy consumption of air conditioners. For scroll compressors, it is necessary to reduce leakage loss and heating loss at half-load and minimum-load conditions with low rotational speed. To reduce these losses, it is important to supply the optimized amount of oil to each of suction chamber and compression chamber. This paper describes development of the high efficiency scroll compressor with the new oil supply structure to control the amount of oil supply to each of bearings and suction chamber and compression chamber independently. In this paper, the relationship between the efficiency of compressor and parameters such as the back pressure, the amount of oil supply to compression chamber and the amount of oil supply to suction chamber is reported. As a result, we optimized these parameters and improved APF by 0.8%.