Can the hotel turn on the air conditioner and close the window to draw air?

Turning on the air conditioner can only make the indoor air circulate by itself. If the air conditioner is turned on for a long time, the indoor oxygen content will decrease, the bacterial content will increase, and the smell of human body or articles will also increase. It can be ventilated every 2 ~ 3 hours.

The ventilation function of air conditioner is the inevitable product of air conditioning and refrigeration equipment, because both air conditioner and refrigeration need indoor closed refrigeration, and long-term refrigeration will lead to indoor air turbidity. At this time, the ventilation function of the air conditioner will play the role of fresh air for indoor air.