Abstract: In recent years, the demand for AC (Air conditioner) with ventilation system in the market has gradually increased, but the high manufacturing cost has limited its widespread use. In order to reduce the cost of AC with ventilation system, a new design scheme is proposed, in which ventilation system unit share a motor with AC. Theoretical analysis and experiment are conducted on the wheel diameter, revolution, power, air volume and noise of the ventilation system. The results show that the scheme has obvious cost advantage, little effect on Annual Performance Factor (APF), and the air volume of ventilation system is 20 m³/ h, so the scheme is highly potential.

Key words: AC with ventilation system, Structural optimization, Share motor, Low cost