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The A C key on the car is the key to the compressor, the compressor is an important equipment for car cooling or heating, and the principle is similar to that of household air conditioning.
The first thing to get on the car in the hot summer is to turn on the air conditioner to refrigerate, usually by pressing the A C button, if you want the cooling effect to be good, you also need to use it with the internal circulation.
A C key switch A C key with the internal circulation is generally a few minutes of temperature in the car is more adaptable, do not open the external circulation, the refrigeration time will be extended, the general vehicle is the default internal circulation, some vehicles will automatically switch the internal circulation and external circulation.
It is recommended that the vehicle with automatic start-stop function turn off this function, otherwise when you park, the engine is turned off, the compressor will also be closed, there is no refrigeration function, the car air conditioner at this time is just a fan, only the engine can drive the compressor, after turning off the engine, the car battery is not able to move the compressor.
The internal circulation and external circulation of the general fuel car heating in winter does not need to turn on the compressor, because the engine will produce a lot of heat, in line with the principle of never wasting energy, the heat is sent to the air conditioning series, when you turn on the car heating switch, do not need to press the A C key, the vehicle will gradually warm up.
But in winter, the car glass is prone to fog and frost and needs to be removed in order to drive normallyAt this time, you can hit the A C button, cooperate with the internal circulation, and then turn on the glass defogging switchAfter removing the fog and frost, turn on the outer loop and turn off the A C keyAt this time, there will be no fog and frost in the car glass.
The window glass is foggyGlass defogging and frosting must be turned on the A C button, and cooperate with the defogging switchSometimes, it is not possible to remove the fog by external circulation, it takes a long time, and it is not clean.
The reason why the external circulation is opened in normal driving is to allow the air to communicate inside and outside the car, so that fresh air continues to enter the car, and the glass is not easy to fog under the function of opening the glass defogging switch.
New energy vehicles, especially pure electric vehicles, do not have engines, and extended-range electric vehicles need to rely on power batteries to drive compressorsThese cars have to turn on the A C button to heat up, and with the internal circulation, they can quickly heat up
The front windshield glass and rear glass defogging switch plug-in hybrid car is an exception, when the engine is not started, driven by the power battery, you need to turn on the A C button to start the compression mechanism heat, when the engine is working, the plug-in hybrid car and the fuel car work on the same principle, through the engine to generate heat for heating, no need to press the A C key.
The most annoying thing is to drive on a rainy day, the temperature is neither cold nor hot, you don't need to turn on the air conditioner, but on a rainy day you don't turn on the air conditioner, the car glass is foggy, you can't see clearly, you can't open it.
At this time, it is necessary to press the A C button, turn on the compressor, and use it with the glass defogging switch and the external circulation, pay attention to open the outer circulation as much as possible, the internal circulation is easy to fog.
A C key with the defogging switch in the city to drive, stop and go, fuel vehicles and more, a block, car exhaust everywhere, this time to close the window, open the inner circulation, do not open the external circulation, exhaust will enter the car, as for whether to turn on the air conditioning depends on the temperature and weather.
If you just buy a new car, there will be a lot of odor in the car, so you need to open the windows frequently for ventilation, but in the hot summer or cold winter, it is not suitable to open the windows, then you need to remove the odor through the air conditioning system.
You can press the A C button to turn on the air conditioner, and cooperate with the opening of the external circulation, which can make the air inside and outside the car continue to communicate, and try to let the air flow under the premise of ensuring the right temperature, which can remove odors for the fresh air.
High-speed internal and external circulation is used to drive on the highway, the speed is fast, the windows must be closed, if necessary, you can open the A C key, so that the temperature in the car can reach the temperature to adapt, my own car is generally set to 22 degrees, set to 23 degrees in summer will be hot, different cars set the temperature of the value is different.
Driving on the highway, in addition to opening the A C key, you also need to cooperate with the opening of the internal and external circulation, and constantly switch to, do not open the internal circulation for a long time on the highway, so that the air will feel turbid, and people are easy to get tired, after all, the space in the car is small.
Every few hours, the inner circulation should be switched to the outer circulation, so that the fresh air outside the car can enter, which can make the driver and passengers feel refreshed, some cars have an automatic switching function, some cars do not, just press it manually.