摘要
研发了一种可间接辨识冰箱制冷能力变化的时间-温差法自动除霜控制技术,在剔除非稳态扰动的条件下,以压缩机累计运行时间为基本约束要素,根据蒸发温度与冷冻室温度的差值变化预估冰箱制冷能力的衰减程度。进行了典型环温、热湿负荷的实验研究,测量了风门启闭、开关门等扰动条件下冰箱内部温度参数的变化,以此为基础建立了时间-温差法自动除霜控制规则。该除霜控制技术在BCD-350W冰箱的应用结果表明:冰箱能够在较宽的环境温度和不同的热湿负荷条件下正常工作,抗干扰能力和环境适应性强,化霜能耗占总能耗的比重下降了40%左右,节能效果明显。
A kind of automatic defrosting control technology, named time-temperature difference method, was developed, which can indi- rectly identify the change of refrigerating capacity of refrigerator. Based on the compressor running time, degree of attenuation of the refrig- erating capacity was estimated according to the change of the difference between the evaporation temperature and freezer temperature, while unsteady-state disturbances were removed. Experiments of typical ambient temperature and heat and moisture load were carried out, internal temperatures were measured when electric air door and box door was opening or closing. Then the automatic defrosting control rule was established under above results. The application of this new kind of defrosting control technology in the BCD-350W shows that the re- frigerator can work properly in wide range of ambient temperature and different heat and moisture loads, the anti-interference ability and a- daption ability to environment is strong, the percentage of defrosting energy consumption in total energy consumption is decreased by about 40% and energy saving effect is obvious.
出处
《制冷学报》
CAS
CSCD
北大核心
2013年第2期49-54,共6页
Journal of Refrigeration
关键词
热工学
除霜控制
风冷冰箱
蒸发温度
温差
pyrology
defrosting control
air cooled refrigerator
evaporating temperature
temperature difference
