Explosion Impact Strength Evaluation Technology and Safety Measures for Refrigerant Circuit Components.

Abstract

The demands of heat cycles are increasing in the recent society where high performance of electronics or comfortability of our life are required. In order to use them safely and efficiently, the thermal accidents caused by high speed destruction or explosion have to be avoided. The usage of a pressure relief valve is one of effective measures. For an instance it can safely exhaust high-pressure combustible gas generated as a diesel engine like explodes in an air conditioner compressor. In this study histories of strain and pressure growing process that was referred as diesel explosion process in the compressor were estimated and measured. Then it was found that the pressure reached to a maximum at 4 msec after the valve was opened, due to the heat supply from the combustion gas inside the compressor, and that these phenomena induced the overshoot of valve pressure. These phenomena were estimated by analyses and experiments, it was found that this overpressure caused the delay of functional removement of the valve. Finally, these information were applied to product design, and these knowledges were able to avoid pressure vessel breakage.