Abstract: Indoor TVOC (total volatile organic compounds) gas is the most important component of polluted gas and affects people's health. Based on the study of the mechanism of TVOC generation in indoor gas, this paper uses metal oxide (MOX) sensor technology to accurately detect the TVOC concentration. In order to prevent excessive fluctuation deviation of TVOC detection, the aging of the sensor and the optimization of the assembly position of the air conditioner need to be carried out in advance to ensure the accuracy of the sensor detection. Finally, combined with the detected TVOC concentration value, the fresh air function of fresh air conditioner is used to introduce fresh air from outside to dilute the indoor TVOC concentration, and different fresh air quantities are introduced according to different concentration values, so as to improve the indoor air quality.

Key words: TVOC, Detection, Fresh air