全自动生化分析仪试剂仓稳态温度场分析

Analysis of steady-state temperature field in reagent storehouse of automatic biochemical analyzer

针对全自动生化分析仪试剂仓诊断试剂因试剂仓内温度未达到试剂存储条件,造成诊断试剂失效,诊断结果错误的问题,对试剂仓结构进行改进,分析改进前后试剂仓内温度场变化情况,使改进后的试剂仓满足医学检验试剂存储的要求。建立试剂仓的三维非线性有限元模型,利用ANSYS CFX14.0进行建模仿真,施加0,0.5,1,4,8 m/s共5种风速分别对模型进行温度场分析。在试剂仓放置温度监测点,实时监测试剂仓内空气温度变化,探索试剂仓温度场有限元分析应用于试剂仓结构优化方面的可行性。仿真结果表明,不加风扇时,全自动生化分析仪试剂仓内空气存在温度分层现象,温差达8℃,加风扇时能使试剂仓内温度控制在4℃左右,温差控制在1℃以内。同时考虑到风扇本身发热情况,确定风速1 m/s能满足对试剂存储温度的设计要求。

If the temperature inside the reagent storehouse of the automatic biochemical analyzer did not meetits reagent storage conditions, it would result in failure of diagnostic reagents and diagnosis of ermake the reagent storage room meet the requirements of medical reagent storage, the structure of the reagentstorehouse was improved, and the temperature field in the reagent room was analyzed before and after the im-provement. The three-dimensional nonlinear finite element model of the reagent silo was established,and the simulation was carried out by ANSYS CFX14. 0 , then the temperature field of the model was analyzed by applying wind speed of 0 , 0 . 5 , 1, 4 , 8 m/ s. The air temperatiure in the reagent compartment was detected at tlie reagent storage temperatiure monitoring point, and the feasibility of the optimization of the reagent compartment was explored by the finite element analysis of the temperature field. The simulation results show that, there is temperature stratification of the air in the reagent chamber of the automatic biochemical fan and the temperature difference is up to 8 E . Adding the fan can make the reagent chamber temperature control in about 4 E and the temperature difference within 1 E . In viewof the fspeed 1 m/s was considered to meet the design requirements of the reagent storage temperature.