Freon is the foreword of heat transfer in air conditioning refrigeration system. Without it, heat cannot communicate effectively. Air conditioning is also impossible to refrigerate or heat. Therefore, once the air conditioner is short of fluorine, the external performance is poor refrigeration (heat), non-refrigeration (heat), maintenance shutdown, indoor machine leakage (sometimes sprinkler), internal machine evaporator icing and so on. And there are more questions that can not be seen on the surface - reducing the service life of air conditioning, spoiling power, harming air conditioning compressors. Therefore, in order to use air conditioning normally, we need to meet the needs of Freon.