Heating is the water of the engine, which is supplied to the air conditioner through the water pump. Normally, it will not increase fuel consumption, unless the engine water is low. At this time, if you turn on the air conditioner and heat, the engine will inject more fuel to allow the water temperature to rise as soon as possible to meet the cooling requirements. heat temperature. Generally, there is no need to turn on the AC to turn on the heater in winter. AC is the compressor switch. It is recommended to turn off the AC to reduce fuel consumption.
Cars exchange a lot of heat in winter. Turning on the AC will increase the car's heat exchange, resulting in poor heating effect of the air conditioner, a drop in engine water temperature, and increased fuel consumption. The colder the weather, the faster the water temperature drops.
It is recommended to turn off the AC, turn on the air conditioner to defrost, turn on the internal circulation, and turn on the external circulation when you see the front window fogging. This has a good heating effect and the water temperature will not drop.
Extended information:
It is normal for the water temperature to drop when the heater is turned on in winter.
Because the heat of the warm air is obtained from the coolant. This is different from refrigeration. Air conditioning is obtained by the work of the compressor. The engine must be assisted by a good cooling system when it is working. The temperature of the combustion chamber in the cylinder reaches thousands of degrees. If the heat is not dissipated in time, the engine will explode soon.
There are two ways to dissipate engine heat: air cooling and liquid cooling.
Air cooling means that the engine block is equipped with heat sinks to dissipate heat. Liquid cooling is currently the most commonly used cooling method in automobiles. Water channels are reserved in high-temperature locations such as the engine cylinder liner and cylinder head, and coolant travels in the water channels. The cylinder head, etc. is like a boiler, constantly heating the coolant in the interlayer to complete heat dissipation.
The temperature of the cylinder is thus taken away by the coolant in the water channel. The coolant is sent to the radiator (front water tank) under the action of the water pump to dissipate heat. The temperature of the coolant flowing through the radiator decreases. Continue to participate in the cycle, and the engine can always maintain normal operating temperature.
Baidu Encyclopedia ?——Car air conditioner (car device)