Causes and solutions for air conditioner blades not closing:

1. When the blades of the air conditioner do not close together, turn the air conditioner back on and then off again, because sometimes the system does not respond. , the command to close the blades needs to be issued again.

2. If the blades of the air conditioner cannot be closed even when the air conditioner is turned on and off again, you need to unplug the air conditioner and wait 10-15 minutes before plugging it back in. This can solve the problem of the blades not closing.

3. When the blades of the air conditioner cannot be closed, you can forcefully reset the blades with your hands, and the blades will be able to close.

4. If manual reset fails, you need to check the blade loose leaf to see if it is damaged. Replacing the blade windshield with a new one can solve the problem.

Air conditioning, that is, air conditioner, refers to equipment that uses manual means to adjust and control parameters such as temperature, humidity, cleanliness, and flow rate of ambient air in a building/structure. Most of them use refrigerant to evaporate or condense under the action of the compressor, which causes the evaporation or condensation of the surrounding air to achieve the purpose of changing the temperature and humidity.

The original air conditioners and refrigerators used toxic gases such as ammonia and methyl chloride. The leakage of this type of gas can cause major accidents. Thomas Midgley invented chlorofluorocarbon gas in 1928 and named it Freon. This refrigerant is much safer for humans, but is harmful to the atmospheric ozone layer. Freon is DuPont's trademark for CFC, HCFC or HFC refrigerants, each of which also includes a number to indicate the molecular makeup of its ingredients. Among them, R-22HCFC refrigerant, which is the most widely used in the field of direct evaporative moderate cooling products, will stop being used in new production equipment starting in 2010, and will be completely stopped in 2020. R-11 and R-12 have been discontinued in the United States. As an alternative, some ozone-friendly refrigerants have been put into use, including the refrigerant R-410A under the trade name "Puron". New environmentally friendly refrigerants R290 and R32 are also gradually entering the market. The R290 molecule only contains carbon and hydrogen, does not contain chlorine and fluorine, and has zero ozone-destroying potential.