Car air conditioning and heating system composition and working principle

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Car air conditioning and heating system composition and working principle 2021-09-08

At present, the car mainly makes full use of the waste heat of the cooling liquid of the engine for heating. This method is usually also called water cooling. When the heating effect is more demanding, the relevant PTC heater will generally be assisted for heating, and finally a good heating effect will be achieved. The main component of the air-conditioning heating system is a heat exchanger, which is mainly used for heating, heating the air in the car interior or the fresh air entering the car interior from the outside to achieve the purpose of heating and dehumidification.

As shown in the figure above, the cooling water control valve on the engine sends the diverted cooling water to the heater core of the heater for heat exchange. The cooling water after the heat is returned to the engine through the heater outlet pipe; at the same time, the cooling water The air is sucked into the heater core by the blower to be heated, and then blown into the interior of the vehicle through different vents for wind window defrosting and heating. By controlling the opening and closing of the cooling water control valve and the amount of water flowing, the heat supply of the heater can be adjusted.

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