A Design of the Block Type Expansion Valve in Automotive Air Conditioning System using HFC-134a Refrigerant

摘要

This study is performed to design the optimal block type expansion valve through analyzing the characteristics of the block type expansion valve in automotive air conditioning system using HFC-134a. Because an alternative refrigerant (HFC-134a) is being used instead of CFC-12 for automotive air conditioning system, newly designed air conditioning components are necessary due to changes in characteristics. The performance tests were accomplished through the test bench, that is manufactured based on the current investigation. And then it was carried out to measure the variation of temperatures and pressures at each part of the air conditioning system according to the compressor speeds.