For many car owners, driving in winter relies on air conditioning and warm air to survive. Some car owners will also press the A/C button of the air conditioner while turning on the car air conditioner to warm the air, thinking that the air in the car will be much better. So when we drive the warm air in the car, is it necessary to open the A/C key, today Xiaobian will give you a good explanation.

A/C key is the refrigeration switch of the air conditioner in the car, when we press the A/C key of the air conditioner, the car air conditioning compressor will start to run and release cold air. Many car owners like to open the A/C button regardless of the cold air and warm air when turning on the air conditioner.
In fact, we don't need to open the A/C button when we turn on the air conditioner in winter, because we just want to blow the hot air when we turn on the air conditioner to warm the air. The traditional car air conditioning warm air is to use the heat of the engine coolant to heat the air, and then the blower blows the hot air into the car. Simply put, the A/C key of the car air conditioner has no heating function, and the A/C key is not used in the process of blowing the warm air of the car air conditioner. If we turn on the air conditioner A/C key when we turn on the air conditioner to warm up the air, it means that the compressor of the car is running, which will additionally increase the fuel consumption of the car.
If you encounter a situation where the windows are prone to fogging, you can open the air conditioner A/C switch to dehumidify. Due to the relatively large temperature difference between the inside and outside of the car in winter, and the air humidity in the car is relatively large, the air in the car is easy to condense into small water droplets when it is cold. At this time, we need to turn on the air conditioner A/C button to quickly remove the fog on the window glass to ensure our driving safety.
We usually open the A/C key of the air conditioner when the window glass is easy to fog, and occasionally we can open the A/C key of the air conditioner, which can play a role in maintaining the air conditioner. If the A/C key of the air conditioner is not turned on for a long time, when we start it again in the summer, it may cause additional wear and tear on the compressor.
After talking about whether to open the A/C button in the winter car, let's talk about whether to use the internal circulation or the external circulation when the warm air is opened in the winter. Some car owners feel that the warm air in the car should be opened in the winter, which is conducive to maintaining the temperature in the car.
Some car owners feel that the warm air in the car in winter should be circulated outside, which can add fresh air to the car. In fact, these two statements are not correct, if we open the warm air in the car in winter has been driving the internal circulation, with the rise of the temperature in the car, the oxygen content in the car will gradually decline, the owner of the car for a long time in the car is easy to sleepy, will affect our driving safety.
Therefore, when the warm air is opened in the car in winter, it should be used alternately inside and outside the circulation. When we are in the hot car because the antifreeze water temperature will not come for a while and a half, we can first open the internal circulation to retain the initial heat, so that the temperature in the car will rise faster. But when the temperature inside the car rises, we have to switch to the outer circulation and let the fresh air outside the car enter the car. If the air environment outside the car is relatively poor, you can continue to use the internal circulation, but open the window gap to maintain the circulation of air in the car.
Well, today's introduction to the knowledge of car air conditioning and warm air is here, if you still want to know other knowledge about car air conditioning, you can leave a message in the comment area.