Do you need to turn on AC when using car air conditioning?
2 Answers
In winter, there is no need to turn on the AC when using the car air conditioning, but in summer, the AC should be turned on when using the car air conditioning. The AC button is the cooling switch of the car air conditioning. If the AC button is not pressed, the car air conditioning will not cool. Car air conditioning refers to the air conditioning device installed in the car, which can cool, heat, ventilate, and purify the air in the compartment, providing a comfortable riding environment for passengers, reducing the driver's fatigue, and improving driving safety. The cooling principle of the air conditioning is: 1. After pressing the AC button, the clutch of the air conditioning compressor can engage, and the engine will drive the compressor to run. When the compressor is running, it can continuously compress the refrigerant and deliver it to the evaporator. The refrigerant expands and absorbs heat in the evaporator. 2. The refrigerant can cool the evaporator, and the cooled evaporator can cool the air blown by the blower, so that the air conditioning vents can blow cold air. In winter, there is no need to turn on the AC because the car's heating is achieved by the heat generated by the car's own engine to produce warm air. The following introduces the normal method of turning on the heating in the car: 1. In winter, when the engine has just started, the temperature of the water tank is still very low. Turning on the air conditioning will not quickly increase the temperature inside the car but will increase the burden on the engine and delay the normal increase of the engine temperature. 2. After the car starts, it takes about 8-15 minutes for the water temperature to rise to the normal temperature. Generally, when the water temperature rises to about 70°C, the heating can be turned on. 3. Turning on the car heating does not require turning on the AC switch because it will start the compressor, which means turning on the cooling.
I've been driving for over 20 years, and whether to turn on the AC in the car depends on the weather and needs. In summer, when using the air conditioning for cooling, the AC must be turned on. The compressor and fan work together to quickly lower the temperature, making the car less stuffy. Without the AC, just using ventilation is like blowing hot air and has no effect. However, in spring and autumn when the temperature is moderate, just turning on the fan for ventilation is enough. Turning on the AC increases the engine load, costing about 10% more in fuel, which isn't worth it. The AC also has the benefit of dehumidifying and defogging. For example, on rainy days when the windows fog up, turning it on can clear up the view for safe driving. Developing the habit of using the AC wisely, such as turning it off before shutting down the engine, can protect the system's lifespan. Regular maintenance is also crucial; otherwise, the cooling effect may be poor, or strange odors may appear.
