냉장고용 압축기의 신뢰성시험 기간 단축을 위한 최대 가혹 온도 조건 탐색

Abstract

Compressor is a major component of refrigeration system. Therefore many attempts to improve performances of the compressor have been conducted. The reliability qualification test is essential when a new product of a compressor is developed to guarantee life time of the product under normal operation conditions. General reduction method of reliability qualification test period is known as acceleration life test. This test is conducted in high stress condition than normal stress condition. An acceleration factor should be increased to reduce reliability qualification test period. And an acceleration factor is usually obtained through an acceleration life test. This paper explained the relationship between the reliability qualification test and test period. Also, This paper deal with acceleration life test method and data analysis for reduction of test period. Through experiments, current was a main factor that affecting condition to highest stress under high temperature. Acceleration factors of two samples were estimated 8 and 7 individually by using the 10℃ law. This result shows that we can reduce the reliability qualification test period 12.5% and 14.3% of total test period. Temperature output of evaporator and temperature of freezer were the main factors that affecting condition to the highest stress under low temperature. Acceleration factor of sample was estimated 2 by using Arrhenius relationship and kinematic viscosity. This result shows that we can reduce the reliability qualification test period 50% of total test period.