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汽车传动轴橡胶（塑）护套低温试验箱是为了测试橡胶护套在多种低温情况下的安全可靠性而研制的。低温试验箱的库房内容积为１ ９００ ｍ ｍ ×１ ２００ ｍ ｍ ×２３５０ ｍ ｍ ， 箱内装有传动轴测试装置， 质量为１ ０００ ｋｇ 左右。它可同时测试四套传动轴试件。箱内温度要求在较小时间内降至－ ４５℃， 并能达到－ ５０℃的温度， 并且距试件１５０ ｍ ｍ 空间处的温度波动度不大于±１ Ｋ。为了获得－ ５０℃的低温， 低温试验箱采用了一级节流中间不完全冷却的两级压缩制冷循环系统。试验表明在设定工况下， 整个系统完全达到设计要求。
Automotive transmission shaft rubber (plastic) sheath low temperature test chamber is to test the rubber sheath in a variety of low temperature conditions of safety and reliability developed. The chamber of the low-temperature test chamber has a volume of 1 900 m × 1 200 m × 2350 m m and a test device for the transmission shaft with a mass of about 1 000 kg. It can test four sets of transmission shaft test pieces at the same time. The temperature in the chamber should drop to -45 ° C in a relatively short period of time and reach a temperature of -50 ° C with a temperature fluctuation not greater than ± 1 K away from the 150 m space. In order to obtain the low temperature of -50 ℃, the low-temperature chamber adopts a two-stage compression refrigeration cycle system which is not fully cooled in the first stage. Experiments show that in the set conditions, the entire system fully meet the design requirements.