Abstract: In recent years, with the development of economy and the improvement of people's requirements for quality of life, the demand for fresh air conditioning in the market has increased. However, due to the high manufacturing cost of fresh air module, it is difficult to promote the use of fresh air. In order to reduce the production cost of the fresh air module, this paper proposes a design scheme of the fresh air module. By optimizing the structural parts of the fresh air module, only a single inlet hood and volute are used to realize the fresh air function. The theoretical analysis and experimental verification are carried out to reduce the noise and air volume generated by the parts. The verification results show that the scheme can effectively reduce the production and manufacturing cost of fresh air, and maintain the fresh air volume and noise.

Key words: Fresh air module, Structural optimization, Low-cost