本機(jī)專門針對橡膠、塑料及各種絕緣材料之熱老化性做測試,換氣式老化試驗機(jī)與一般烘箱之區(qū)別在于強(qiáng)制性達(dá)到箱內(nèi)空氣的置換，并達(dá)到一定的次數(shù)。不同規(guī)范中對換氣量有不同的界定。
■This tester is specialized in the aging test of rubber, plastic and various isolation materials. Differed with the general oven, Ventilation Aging Tester can realize the compulsory interchange of air inside the box with several times. Different rules have different regulations on the ventilation volume;
換氣量的計算公式為： N=（X-Y）3590/V.D. △T
N:每小時換氣量 Number of change of ais per hour.
X:換氣耗電量W)Power consumption during air change
Y:無換氣時耗電量(W) Power consumption during no air change
V:箱內(nèi)容積(cm3) total volume of over
D:箱內(nèi)空氣比重 (g/cm3) Density of over ambient ais
T:箱內(nèi)外溫度差 (℃)Temperature difference inside/outside