With the development of the times, car air conditioning has become a necessity on the car: today Tianxing Ruijun will come to tell friends about air conditioning refrigeration and heating which is more expensive? The answer is refrigeration
The car has a warm air in winter, and the cost of oil is very small, which is basically negligible.
When the car air conditioner is cooled, the oil cost is relatively more, because the power of the car air conditioner cooling accounts for about 10% to 15% of the engine output power.
To illustrate this problem specifically, I will draw conclusions by analyzing how air conditioning heating and cooling work. Old Iron, don't walk away, keep looking down.
What is the principle of air conditioning heating?
First of all, the principle of air conditioning heating is to let the coolant of the engine flow into the heat exchanger, and then the blower blows the heated air into the car.
The hot air blown by the air conditioner comes from the heat generated by the engine
To put it simply, this "hot air" of the air conditioner relies on the coolant of the engine to provide the heat source, and then relies on the air conditioning fan to blow this heat into the car.
As I said above, the principle of warm air is that the blower blows hot air into the car, but the power of the blower is very small, so its fuel consumption is basically negligible.
Therefore, we can say that when the car is warm in winter, its fuel consumption is very small, or basically negligible.
Press the A/C button on the warm air, and the fuel consumption will increase
When you press the A/C key when you turn on the warm air, the car air conditioning compressor will always work.
Most of the car air conditioning compressors are driven by engines, which is bound to cause an increase in fuel consumption and engine burden on the car.
In colder northern regions, open warm air may increase fuel consumption
There are also some friends who live in the colder areas of the north, even if the warm air does not press the A/C button, they may feel that the fuel consumption has increased, what is going on?
Because in the cold north, the temperature is relatively low, so when the water temperature of the car is lower than the set value, in order to maintain the working temperature of the engine, the car computer will increase the amount of fuel injection to maintain the normal working temperature of the engine.
It's like saying, I'm already very cold myself, and you have to take some of my heat, then I must go to find a place to warm up after a while, otherwise I will live myself.
Therefore, in this case, the open warm air will also really increase some fuel consumption.
What is the principle of car air conditioning refrigeration?
(1) Compression process
When the engine drives the compressor to run, the compressor sucks in the low-temperature, low-pressure refrigerant gas at the outlet of the evaporator, compresses it into a high-temperature, high-pressure gas to discharge the compressor.
(2) Condensation process (exothermic)
The superheated refrigerant gas at high temperature and pressure enters the condenser, and the pressure and temperature decrease. When the temperature of the gas drops to 40 ~ 50 ° C, the refrigerant gas becomes liquid and releases a large amount of heat at the same time.
(3) Expansion process (throttling)
After the liquid refrigerant flows to the reservoir dryer, moisture and impurities are removed from the reservoir dryer and flow from the pipe into the expansion valve. The refrigerant liquid with higher temperature and pressure becomes larger after passing through the expansion valve device, and the pressure and temperature drop sharply, and the expansion valve is discharged in a fog.
(4) Evaporation process
After the low-temperature and low-pressure mist refrigerant enters the evaporator, it is boiled and vaporized by absorbing the heat of the air around the surface of the evaporator through the wall surface of the evaporator, thereby reducing the air temperature in the car. Under the action of the blower, the cold and hot air in the car accelerates convection, improving the cooling effect of the air conditioner. The refrigerant vapor after absorbing heat vapor in the evaporator is sucked in again by the compressor and then the above process is repeated.
The focus of today's tian is to know that the key core component of refrigeration on car air conditioning is the "compressor", and it is driven by the engine.
And we usually press the A/C button, which means that the air conditioning compressor starts to work, then the air conditioner can blow out the cold air, and in this case, it is bound to cause an increase in the fuel consumption and engine burden of the car.
The compressor is a zui energy-consuming device in the automotive air conditioning system!
Because the power of automobile air conditioning refrigeration accounts for about 10% to 15% of the engine output power, and in the journal of air conditioning technology "Experimental Study on the Influence of Air Conditioning on Fuel Consumption of Light Passenger Vehicles", the proportion of power consumption obtained during air conditioning refrigeration is also mentioned.
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From February 18, 2022 to March 31, 2022