冰箱热气旁通除霜技术压缩机防液击方案探讨及验证

Discussion and verification of compressor anti liquid hammer scheme for refrigerator hot gas bypass defrosting technology

压缩机液击故障是制约热气旁通除霜技术在家用冰冷产品上应用的关键问题,为了研究不同压缩机防液击方案对于除霜性能的影响规律,设计通过整机样品搭载储液器气液分离方案和压缩机自防方案两种方案,从功耗、除霜速度、热量利用率、间室温升等方面分别开展验证。验证显示:压缩机自防设计较储液器防液击方式化霜功率高、质量流量大、化霜时间短,除霜部分功耗节能约8%,间室温度回升呈现劣势,单点空载温差最高约6℃左右。

Compressor liquid hammer fault is a key issue that restricts the application of hot gas bypass defrosting technology in household cold products.In order to study the impact of different compressor anti liquid hammer schemes on defrosting performance,two schemes were designed,namely the gas-liquid separation scheme with a liquid reservoir and the compressor self protection scheme,to verify the power consumption,defrosting speed,heat utilization rate,room temperature rise,and other aspects.Verification shows that the self protection design of the compressor has higher defrosting power,higher mass flow rate,and shorter defrosting time compared to the anti liquid hammer method of the reservoir,the defrosting section saves about 8%of power consumption,and the room temperature rebound presents disadvantages,the maximum temperature difference between single point and no-load is about 6℃.