Heating principle of automobile air conditioner
After the automobile engine is started, the temperature of engine oil and coolant will continue to rise, taking away the residual heat of the engine. Coolant flows through the heat exchanger in the heating system (usually called warm air small water tank) to exchange heat between the air delivered by the blower and the engine coolant. After the air is heated, it is sent to the car through the air outlet by the blower, which is one of the common heating principles of air conditioning.
trouble clearing
The hot air tank is blocked.
The structure of the hot air box is actually a simplified version of the radiator of the engine water tank. There are many small cooling pipes in it, which are as easy to block as the radiator of the water tank. After the coolant flowing through the hot air box is blocked internally, the speed becomes slower, the flow velocity becomes smaller, and the heat is insufficient, so the hot air of the air conditioner is naturally not hot.
The cooling system is short of coolant.
Coolant is usually called antifreeze. The warm air of automobile air conditioner comes from this, and its principle is different from that of household air conditioner. Automobile warm air circulation is a parallel pipeline in the small circulation pipeline of engine coolant. The pipeline is connected with the heater box. The blower generates warm air after blowing the warm air box. The warm air in the air conditioner is like this. Insufficient coolant in the cooling system is the most common and easily solved fault phenomenon, which will lead to warm air.
The position of the heater box can be seen from the engine compartment. In some models, the heater box will be located higher than the cylinder block, equal to or higher than the cylinder head. This will ensure that in case of insufficient coolant, the coolant will circulate in the cylinder block and cylinder head first. After the coolant is replenished, the hot air tank will be filled with hot coolant, and the hot air will naturally heat up.
The necessity of cleaning the air conditioner.
Automobile air conditioning brings comfort and enjoyment to people, but it also brings some hidden dangers, because the car will inhale a lot of dust and dirt from the air inlet of the air conditioner and adsorb it on the evaporator of the air conditioner during driving. These adsorbents will breed a large number of fungi in the high temperature and high humidity environment of evaporator, which will make people dizzy and disgusting. Over time, they will also suffer from some respiratory diseases, which will endanger people's health and affect the cooling and heating effect of automobile air conditioners.
Summary: In fact, the most important thing in the whole article is "maintenance". Once the warm air is not hot, there is no need to panic. Follow the above steps to solve the problem. In fact, the maintenance of automobile air conditioning is mainly daily maintenance, and improper maintenance will affect the refrigeration and heating of automobile air conditioning. I hope it will be helpful for you to read the brief introduction about the reasons why the automobile air conditioner does not heat up.