Abstract: As a frequently used appliance in the kitchen, the stability of the range hood installation is particularly crucial. By studying the cracking problem of the fan frame hook hole discovered in the trial feedback of new products, exploring the root causes of defects in the manufacturing process, taking the hook hole of the fan frame in the key component of the range hood as the research object, designing different hook hole structures to affect the installation efficiency of the electrical appliance, analyzing four typical types of fan frame hook hole structures in the market, and simulating and comparing the differences between the four structures in the maximum stress value and maximum stress concentration area. Using an electronic universal material testing machine, the ultimate bearing capacity of hook holes with different structures is tested to obtain their load-bearing limit values and deformation forms of the hook holes. The results show that considering the optimal strength and the most uniform stress distribution, the deformation degree of the upper installation contact position of the hook hole in structure C and D schemes is relatively light. The addition of reinforcement technology at the installation contact position of the hook hole improves the strength of the hook hole.

Key words: Range hood, Fan frame, Hanging hook hole, Numerical simulation