附加回风隔断装置的冷风机融霜试验

Experimental research on defrosting process of cooling fan withreurn air cover and heat insulation device

为了减小电热融霜产生的融霜热对冷库内温度场的影响,为低温库内的一台冷风机设计一套回风隔断装置,并在不同工况下进行试验,研究有无回风隔断装置库内冷风机融霜结束后内外温度场分布、融霜开始至恢复初始设定温度库内温度场的波动以及电热融霜结束后的能耗情况。结果显示,增加回风隔断保温装置后,冷风机盘管内部温度场分布较均匀,冷风机外部温度场的温度波差减小了3.2℃,融霜时间缩短了近360s,融霜能耗降低了9.54%,说明回风隔断装置在融霜过程中在稳定温度场波动、缩短融霜时间和降低能耗上起到了一定的作用。

In order to reduce the effect of electric defrosting heat on the cold storage temperature change during defrosting process,a heat insulation defrosting device with a return air cover and outlet baffle was designed,through the different condition of experiments,then the questions that how the return air cover and partition device to influence the temperature field around the air-cooler,the cold storage temperature and the consumption of electric heating defrosting were studied through comparing the experimental data whether the return air cover and partition device was used or not.The results indicate that after using the return air cover and partition device,the temperature distribution inside the cooling fan coil is more uniform,the fluctuating temperature field outside the fan is decreased 3.2 ℃.meanwhile,the defrosting time with the device is shortened by nearly 360 sand reduce energy consumption around 9.54%,which proves that the return air cover and partition device can stabilize the storage temperature and shorten the defrosting time and energy consumption saving in the defrosting process.