Coolant, commonly known as antifreeze, comes from this, and its principle is different from that of household air conditioning heating. Automobile warm air circulation is to connect a pipeline in parallel in the small circulation pipeline of engine coolant, which is connected with a warm air water tank, and the blower blows the warm air water tank to generate warm air, which is how the air conditioning warm air comes from. The lack of coolant in the cooling system is the most common and easily solved fault phenomenon that causes the warm air not to be hot.
When designing the engine cooling system, engineers will give priority to engine heat dissipation, and then the warm air can work normally. When the coolant is insufficient, the coolant will circulate in the engine first. At this time, there is no "water" in the warm air circulation pipeline, and most of the warm air tank is gas. At this time, the air conditioning warm air is naturally not hot.
You can see the location of the heater tank from the inside of the engine compartment. In some models, the position of the warm air water tank will be higher than that of the cylinder block and cylinder head, or even higher than that of the cylinder head, thus ensuring that the coolant will circulate in the cylinder block and cylinder head first in case of insufficient coolant. After the coolant is replenished, the warm air tank will be filled with boiling coolant, and the warm air will naturally heat up.
Extended data:
Warm air and cold air work differently. Cold air is formed by pressurizing the compressor to liquefy the refrigerant and then vaporizing it to absorb a lot of heat in the air. When the cold air is turned on, the compressor pulley drives the compressor to work, which increases the engine load and consumes a certain amount of fuel.
Warm air comes from the heat generated when the engine is working: when the cooling system of the engine radiates heat to the engine, the radiated heat is sent into the car through the fan to form warm air; When the warm air is not used, the fan stops running, the hot air port is closed, and the heat emitted will be completely dissipated into the atmosphere. Therefore, the car heater belongs to waste recycling and will not consume oil.
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