After entering the winter, the temperature is getting lower and lower, and the temperature has gradually dropped in the last two days, and many places in the country have started the "cold winter" mode. In the cold and hot season, the frequency of car air conditioning is the highest, in order to get a comfortable driving experience, the vast majority of car owners will turn on the air conditioner as soon as they start the car.
The working principle of automobile air conditioner is the same as that of ordinary household air conditioner, which requires compressor cooling or heating. The difference is that a home air conditioner uses 220V alternating current, while a car air conditioner uses 12V or 24V direct current. Moreover, the on-board air conditioner is linked to the engine to work together, so turning on the air conditioner means consuming more fuel, in order to save fuel, some car owners would rather be cold than turn on the air conditioner.
As we all know, the use button of the car air conditioner is generally the "AC" key, and when the AC is turned on, the air conditioning system will enter the working state. When driving in winter, some car owners turn on the "AC" when they get into the car, but this is not necessary. In winter, don't turn on the air conditioner in the car, don't turn on "AC"!The old driver's trick is to turn on the air conditioner like this, which is warm and fuel-efficient!
When driving in winter, there are two ways to use the car air conditioner to heat up, in addition to turning on the "AC", in fact, we can also use the temperature of the engine water tank to heat, which is both fuel-efficient and comfortable.
As we all know, the car engine generates a lot of heat in the process of working, and in order to dissipate heat, engineers designed a water tank on the car. When the engine temperature rises to a certain level and the coolant is not enough to cool down, the thermostat on the engine is opened, the water tank participates in the circulation of cooling, and the water pump injects the coolant in the water tank into the engine, and then returns to the water tank (radiator) for cooling.
The heating of the car air conditioner is achieved by the temperature of the water tank, and the air conditioning system uses the engine water temperature to heat the intake air and blow it into the upper, middle and lower air outlets of the cab, thereby increasing the ambient temperature in the car. As we all know, after the car engine starts, the heat is continuous, as long as the engine is ignited, the temperature of the water tank will always be in a high state, and we can use the air conditioner hot air for heating.
The normal operating temperature of a car engine is generally between 80 degrees Celsius and 90 degrees Celsius, and some high-performance engines can reach a working temperature of more than 100 degrees Celsius, so we don't have to worry about the temperature of the heater at all. However, it should be noted that the use of warm air heating must wait until the engine water temperature rises before turning on the hot air button, this is because the temperature of the cooling water of the engine is low when the car is just started, which is not enough to meet the heat required by the warm air. Generally speaking, in winter, after waiting for about 3-5 minutes after the car starts, the temperature of the engine water tank will rise, and then turn on the heater switch, and the car will become very warm.
In winter, when a car turns on an air conditioner, it is completely different to use the warm air of the water tank for heating and using an air conditioner for heating. If you use the air conditioner "AC", you must turn on the compressor, if you use the water tank heater, the compressor is not working, this heating method is warm and not dry, which is both fuel-efficient and comfortable, and has become the first choice of most car owners.