차량용 가변사판식 압축기의 흡입체크밸브 최적화에 관한 연구

Development of a compressor for vehicle air conditioning system has been focused on high performance and noise reduction. Suction check valve is used to prevent the noise that is caused by the suction pulsation when a clutch-less compressor is operating in an OFF state. However, the suction pressure drop due to the increased flow resistance reduces the cooling capacity of a compressor. The aim at this study is to predict the cooling capacity drop rate and improving the performance with optimized suction check valve shapes. It proposed the theoretical cooling capacity drop rate, and the experimental studies were carried out in order to verify this. But those were not matched each other so that CFD analysis program was used to look for the cause. Results show that the pressure distribution of a valve surfaces affects the suction pressure drop. The cooling capacity was improved by the suction check valve that is modified to increase average pressure on a valve surface.