Mechanical efficiency of various large capacity scroll compressors.

A Study on PWM Bypass Capacity Control of Scroll Compressors

A pulse width modulation (PWM) bypass capacity control technique for air conditioners has been developed to achieve high scroll compressor efficiency over a wide capacity range, and we investigated the technique’s fundamental characteristics in this study. With this capacity control technique, the refrigerant flow rate is controlled by periodically switching a full load mode, in which the refri...

Development of High Efficiency Scroll Compressors, for Air Conditioners

Recently, a scroll compressor for air conditioners has been developed, because of its high efficiency, quiet operation, light weight and small size. To accomplish high efficiency, self sealing mechanisms such as a tip seal and a swing link mechanism are very effective. Tip seals which are placed on the top of scroll wraps achieve thrust sealing and a swing link mechanism achieves radial sealing...

Dimensional Optimization of Scroll Compressors

Development of Large Capacity CO2 Scroll Compressor

CO2 refrigerant with a high operating pressure has a large difference between the suction and discharge pressures in compressors. Because of a load increase, the high performance and high reliability of compressors are required. Compared to the scroll compressor employing the conventional refrigerant, the thrust load increases in the CO2 scroll compressor. Therefore the design of thrust bearing...

Break-in Behavior of Scroll Compressors