You are smiling like a flower in the sunshine in the south; I tremble in the cold winter in the north; your warmth is self-evident, my cold is unparalleled; where is the warmth in winter? In the sun, in the room, and even in the car air conditioner heater. But do you know where this warmth comes from? Ted Car Air Conditioning will analyze the principle of car air conditioning heater, so as to help you use it better.

The main function of the car air conditioning heating system is to adjust the air to a comfortable temperature for the members together with the evaporator, to provide heating to the car in winter, to improve the ambient temperature in the car, and to deliver hot air when the glass on the car is frosted and foggy. to defrost and defog. There are several forms of heating equipment, which can be divided into: non-independent (engine-based) heating system and independent (non-engine based) heating system according to the heat source used. Cars generally use a non-independent heating system. The non-independent heating system uses the waste heat of the exhaust gas of the car or the waste heat of the cooling circulating water of the engine as the heat source and introduces it into the heat exchanger, and the fan blows the air inside or outside the car through the heat exchanger to heat it up.

This is why some people say that turning on the heating in winter costs no fuel. This statement is not entirely correct, and we will talk about it in detail later. Heat Exchanger Heating Systems Heat exchangers work by installing a heat exchanger on the exhaust pipe of the engine to heat the air. When working, the valve leading to the muffler is closed, the exhaust gas enters the heat exchanger to heat the air on the other side, the cold air absorbs heat and the temperature rises, and is blown into the cabin by the fan. The heating effect of this device is affected by the speed of the vehicle and the working conditions of the engine, and the heating temperature is relatively unstable. The heat pipe type uses a heat pipe heat exchanger to recover the waste heat in the engine exhaust, which is mainly used for heating of large cars in winter. The heating effect of the heat pipe heater is good and reliable, and the exhaust gas of the engine will not leak into the cabin. Automobile waste water heating system The waste water heating system uses the cooling water of the engine as the heat source to heat, and is commonly used in cars, trucks and small chartered vehicles. It uses the cooling water of the engine as the heat source, and through the heat exchanger (generally called the heater core) in the device, the air sent by the blower is exchanged with the cooling water of the engine, and the air is heated and sent into the room. In trucks, vans or pickup trucks that are not equipped with air conditioning, an assembly consisting of a heater core, a fan and a casing is generally used. Air outlet for defrost action.

In cars and more luxurious trucks, the heater core and evaporator (refrigerant circuit) are assembled in a box, sharing a fan and housing. The waste heat water heating system is simple in installation and reliable in heat supply, and does not require additional fuel. As long as the engine is working, hot water can be produced. The temperature difference is too large. When the car is just started, do not turn on the air conditioner fan immediately. The normal operating temperature of the engine is 80°C. During the normal operation, the engine cooling fan does not start, and the cooling effect is achieved by the external cold air. When the fan is heated, it is equivalent to turning on the cooling fan, so that the water in the cooling water pipe dissipates heat to supply the car, and the temperature of the engine drops sharply. ratio), then your car's fuel consumption will increase. However, it is difficult for large passenger cars to meet the heating requirements only by relying on this device, and the new diesel engine has high efficiency and relatively little waste heat that can be used for heating. In view of the above shortcomings of the non-independent heating system, engineers developed and applied the independent heating system. Independent heating system Independent heating systems are commonly used in large luxury cars, passenger cars and cars used in cold regions. The so-called independent, that is, its operation independent engine. According to the different heating medium, it is divided into air heating type heater and water heating type heater. Both types of heaters burn gasoline or diesel in a burner, and the heat generated heats air or water. The combusted gas is discharged out of the car after heat exchange, and it does not pollute the air in the car room.