关键词: 吸油烟机, 偏心蜗舌, 工作风量, 数值模拟

Abstract: In response to the operational air volume and noise requirements in user environments specified by GB/T 17713—2022 Range hood and other cooking smoke suction and exhaust devices. Focuses on a specific range hood model, fluid dynamics simulation analysis was conducted on range hoods equipped with conventional volute tongues. Based on the flow field characteristics revealed by the simulation results, three optimized design schemes of eccentric volute tongues were proposed. A comprehensive comparison of flow field details and performance metrics was implemented through numerical simulations and experimental validation methods to evaluate these three tongue configurations. The results show that the concave eccentric conical tongue can effectively reduce the impact of airflow on the middle and rear side of the conical tongue, improve the flow speed and stability in the main working area, and increase the working wind volume by 0.66 m³/min at 1050 r/min speed, while the noise level is the same as the prototype.

Key words: Range hood, Eccentric volute tongues, Operational air volume, Numerical simulation