What Do Internal and External Circulation Mean?
2 Answers
Here is an introduction to the meanings of internal and external circulation: 1. Internal circulation: When using internal circulation, the vehicle's interior space is like a sealed environment. Whether it's the cold or warm air blown by the air conditioning, it circulates within the car, and no fresh air enters the vehicle. 2. External circulation: When external circulation is turned on, fresh air from outside flows into the car, improving the air quality inside the vehicle, which is also a good way to use it. Below is extended information on whether to use internal or external circulation during normal driving: 1. Summer: Turn on internal circulation when using cold air in summer to prevent outside heat from entering the car, during smoggy days or traffic jams to avoid outside air from entering the vehicle. 2. Highway: Use external circulation when driving on highways to ensure fresh air circulation, when smoking to quickly expel smoke, and after prolonged sun exposure to release toxic gases from the car.
As a driver with over a decade of experience, I've found that the recirculation and fresh air modes are two crucial functions in a car's air conditioning system. Recirculation mode draws air from inside the cabin and recycles it while driving, effectively blocking external dust, smoke, or unpleasant odors from entering the vehicle. This is particularly useful on highways or during hazy weather conditions, helping maintain clean air inside the car. On the other hand, fresh air mode brings in outside air for ventilation, which is especially helpful for quickly defogging windows during rainy days and preventing obscured visibility that could lead to hazards. During long drives, I frequently switch between these two modes - using recirculation in traffic jams to avoid exhaust fumes, then switching to fresh air on open roads to stay refreshed. Remember to regularly inspect your cabin air filter; if it smells bad or gets clogged, it will affect both modes' efficiency. Generally, replacing it annually ensures a more comfortable and safer driving experience.
