The lack of warm air may be because the engine has just started and the temperature of the coolant is still relatively low, so the warm air will not be blown out after the warm air is turned on. Another possibility is that the heater water valve and heater water tank are out of order, which will also cause the automobile air conditioner to fail to heat.
Automobile air conditioner uses the heat of engine, and the heating principle of automobile air conditioner is very simple. When heating, the high-temperature coolant in the engine will flow through the warm air tank, and the wind from the blower will also flow through the warm air tank, so that the air outlet of the automobile air conditioner can blow out warm air.
Warm air water tank is a heat exchanger and a key component of automobile air conditioning and heating.
If the heating box fails, it will cause the car air conditioner to fail to heat.
When the car engine was just started, the temperature was relatively low. At this time, it is impossible to blow out the warm air by turning on the warm air. At this time, turning on the warm air will also slow down the temperature rise of the engine, resulting in a decrease in engine power and an increase in fuel consumption.
It is suggested that the heater should not be turned on when the engine is just started, but should be turned on when the car is running normally 10 to 20 minutes.
Automobile air conditioning can also be used for refrigeration, and the refrigeration principle of automobile air conditioning is also very simple. During refrigeration, the engine will drive the compressor to run, and at this time, the compressor can continuously compress the refrigerant and transport it to the evaporation box. The refrigerant can expand and absorb heat in the evaporation box, so the refrigerant can cool the evaporation box.
Cooling the evaporation box can cool the wind blown by the blower.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)