Air conditioning and electric fans have their own advantages and disadvantages, and reasonable use will be good for your health. First, the advantages of air conditioning: it can obviously adjust the temperature of indoor air, and it can be adjusted to different temperatures as needed. And listed early, many brands, many choices. Disadvantages: large volume, expensive price, and after use, because the room is closed, the air is not circulated, and the indoor air temperature is uneven, it is easy to cause discomfort and air conditioning disease. At the same time, the power consumption is high, which is unacceptable to consumers. Second, the advantages of the fan: low power consumption, low price, some products also have warm air function and negative ion function, small size and convenient movement. Disadvantages: it is not very effective for large-area refrigeration, has no dehumidification function, is not easy to use in high-temperature places, and increases the humidity in the air when used. Working Principle Air conditioners are divided into single cooling air conditioners and cold heating air conditioners, and their working principles are the same. Freon used to be the common refrigerant in air conditioning. The characteristic of freon is that it releases a lot of heat when it changes from gas to liquid. When it changes from liquid to gas, it will absorb a lot of heat. That is, the air conditioner is designed according to this principle. The compressor compresses the gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and then sends it to the condenser (outdoor unit) for heat dissipation, and turns it into liquid refrigerant at normal temperature and high pressure, so the outdoor unit blows out hot air.