Air conditioning and refrigeration system: The air conditioning unit sends out qualified and stable side  air according to the process and environmental requirements, and the return air is drawn from the  spinning and winding room through the return fan into the air conditioner (Winter ) ; at the same time,  an appropriate amount of fresh air is introduced to mix, filter, and then spray. Drenching and humidifying; (Summer) after cooling and cooling treatment in the refrigeration system, it is pressurized by the  blower and then purified by the medium-efficiency filter, and finally sent to each spinning position and  workshop