What is the principle of the expansion tube warm air tank?

2026-10-31 08:47:25

　　The working principle of the expansion tube warm air tank is mainly based on the principles of heat conduction and convection, and its detailed process is as follows:

1、 Basic Structure

　　The expansion tube warm air water tank is usually made of aluminum alloy or other metal materials, and the internal expansion tube technology is used to expand the tube and attach it to the heat sink. This design increases the heat conduction area, which is conducive to rapid heat transfer. The warm water tank is also equipped with inlet and outlet pipes for connecting the engine coolant circulation system.

　　2、 Working principle

　　Heat transfer:

　　When the engine is running, the coolant circulates inside the engine, absorbing and taking away the heat generated by the engine's operation, causing the coolant temperature to rise.

　　The high-temperature coolant enters the expansion tube warm air water tank through the inlet pipe, and the heat in the coolant begins to transfer to the heat sink inside the water tank.

　　Heat dissipation and convection:

　　The heat sink is made of high thermal conductivity material, which can quickly disperse the heat in the coolant to the entire heat sink.

　　As heat is transferred, the temperature on the surface of the heat sink increases, creating a temperature difference with the surrounding air, thereby generating convective effects.

　　After the fan inside the warm air tank is started, it blows cold air over the surface of the heat sink. The cold air absorbs the heat on the heat sink and becomes hot air, which is then blown into the car through the air duct.

　　Adjust temperature:

　　The warm water tank is usually equipped with a temperature regulating device (such as a temperature control valve or electronic temperature control system), which is used to adjust the flow and temperature of the coolant entering the warm water tank according to the temperature requirements inside the car.

　　When the temperature inside the car reaches the set value, the temperature control device will reduce or stop the coolant from entering the warm air tank to prevent the temperature inside the car from being too high.

　　III. Conclusion

　　The expansion tube warm air tank utilizes the heat of the engine coolant, combined with the principles of heat conduction and convection, to provide a warm and comfortable environment for passengers inside the car. Its efficient heat dissipation performance and temperature regulation function make the expansion tube warm air water tank an important component of modern automotive heating systems. At the same time, the application of expansion tube technology has also improved the thermal conductivity efficiency and service life of the warm air water tank.