Turning on the air conditioner has a great impact on fuel consumption, and it also has a great impact on power. Generally speaking, turning on the air conditioner will add one or two more fuel to the vehicle. We all know that the temperature of the air conditioner directly determines the level of fuel consumption, just like the household air conditioner, the lower the temperature, the more electricity is consumed, and the higher the temperature, the more power saving, of course, it is not so cool. Many people think that they have heard many old drivers say that the temperature of the car air conditioner only affects fuel consumption, and the air volume does not affect fuel consumption, or only has a very small impact. In fact, this is completely incorrect, in fact, air volume also has a great impact on fuel consumption.
Let's think about it with the idea of heat exchange, the air conditioner in the car is turned on, the temperature is constant, and the air volume is turned on in first gear to feel that the car is very hot, not cool at all. But if the air volume is turned on third gear, it will feel cool inside. It can be seen that the amount of air volume will affect the cooling effect. The greater the amount of air, the more cold air can be blown out. Where do these cold winds come from? It is obtained by the compressor compressing the refrigerant through heat exchange, and the compressor needs to run to get these cold airs. As long as the compressor is working, fuel consumption will inevitably increase. It can also be understood that these cold air are exchanged for consuming fuel, so the larger the air volume, the higher the fuel consumption will definitely be.
At this time, some people will still have questions, even if the air volume is small, these cold air does not blow out, the compressor is the same working mode and working time, and it is just a waste if it is not blown out. It means that as long as the air conditioner is turned on, the compressor will always be working at full load, and the cooling capacity is certain, so much if you don't use it. This is certainly not true, air conditioning technology has been developed for so many years, and the current requirements for energy conservation and emission reduction are so high, how can this waste be allowed.
Take the most wasteful fixed-displacement compressor as an example. As long as the air conditioner is turned on, it is indeed working all the time, and the cooling capacity is indeed certain. Of course, this is only in the early days of turning on the air conditioner. When the operation is stable, the compressor will be shut down. That is, after working for a period of time, when the temperature of the evaporation tank reaches about 4 degrees, the compressor will stop working.
If the compressor does not work, of course, it will not consume additional fuel. If the air volume is very large, first of all, the compressor shutdown will be delayed, and the large air volume will blow away the cold air, so that the temperature of the evaporation tank will not reach 4 degrees for a long time, and it will not stop for a long time. Even if the machine is stopped, after a large amount of air blowing, the cold air is quickly blown away, and the compressor is about to start working again, and the downtime is very short. Therefore, the high air volume will prolong the working time of the compressor, so that the fuel consumption will inevitably increase. If the air volume is small and the cold air that can be blown away is less, the evaporation tank will soon reach 4 degrees, and it will stop without consuming fuel, and it will often take a long time for the temperature to rise before it will start again, and the fuel consumption will inevitably be much lower.
In general, the factor that affects fuel consumption when the air conditioner is turned on is the working time of the compressor, not the air volume of the blower. The amount of air volume does not seem to have a direct impact on fuel consumption, but it affects the working time of the compressor and indirectly affects fuel consumption. If you don't turn on the AC button, the compressor doesn't work, only the blower is turned on. At this time, the amount of air volume does not affect fuel consumption. Because at this time, the blower is equivalent to a fan, and the different air volume is equivalent to the first, second and third gears of the fan. The amount of power consumed varies slightly depending on the gear, but it's not much different. Because the power of the blower itself is very small, the power consumption is very small, and the difference in gear is almost negligible for the power consumption. It's like the difference between the first and second gears of the fan in the home is negligible compared to the air conditioner.
Therefore, simply looking at the air volume of the blower is of course having little impact on fuel consumption, but the air volume is related to the working time of the compressor, and if it affects the working time and load of the compressor, it will inevitably affect the fuel consumption.