What is the function of a green button on the remote control of Hisense air conditioner?

There is a green button on the remote control of Hisense air conditioner, which is the air refreshing function button. According to relevant data, a green leaf button with water drops on Hisense air conditioner remote control is an air freshening function button. Hisense Air Conditioning is affiliated to Hisense Kelon Guangdong Air Conditioning Co., Ltd., which is a wholly-owned subsidiary of Hisense Kelon Electric Appliance Co., Ltd.