Yuuichi Yanagase

Development of High Efficiency Scroll Compressor

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 and half-load cooling and heating conditions, is therefore required. To achieve this, a high efficiency compressor that operates at half-load conditions is necessary because compressors account for most of the energy consumption of air conditioners. For scroll compressors, it is important to reduce leakage loss and over-compression loss at half-load conditions with low rotational speed and low load. This paper describes how scroll-compressor efficiency was improved at half-load conditions.