Optimization Of Fume Collection Cover And Effect Of Impeller On Range Hood Performance

Range hood is getting more and more favor of people as a kitchen appliance. At present, most of the range hood inlet velocity is not uniform. Large pressure loss, the smoke around fume collection cover escape.so they cannot reach the ideal gettering lampblack effect. The impeller is used as the core component of range hood. the changes of structural parameters on the impeller have great influence on the overall performance of the hood.This topic comes from the cooperation project, the optimization objective is the maximum air volume of 16m3/min,based on the existing fume collection cover. In this paper, we aim hood inlet velocity uniformity, minimum pressure loss and maximum flowrate as the fume collection cover optimization goal. For the simulation and comparison of the fume collection cover drainage plate of different schemes, calculateing the mass flow and pressure loss. Then the internal flow status of the fume collection cover is analyzed. Based on the results the fume collection cover which meets the design goals is found.Adopt the method of orthogonal test of the double suction impeller structure parameters on the efficiency of the range hood airflow and influence to do the double objective optimization, the optimal combination plan, respectively made the impeller structure parameters influence on the air volume and efficiency curves of single factor. Changes in The velocity flow chart, the velocity vector diagram and the pressure contour of the impeller with different structure parameters were compared and observed.The internal leakage phenomenon which leads to declining flowrate is found. Combined with the velocity triangle model and impeller structural parameters of the air volume relationship curves.we get the impeller structural parameters of hood air influence mechanism.In this paper, the optimization of fume collection cover meets the design requirements. The pressure loss is 18.8% lower than that of the prototype. Air intake is more uniform and flow loss is smaller. Through the dual-objective optimization of double suction impeller, the range hood is higher than the design target of 11.4%, and the range hood airflow is almost linear relationship with inlet installation angle and width of impeller. The relationship between flow rate and impeller disk position is more complex. The results obtained in the research process can provide theory and data support for the further development of the fume collection cover and impeller.