Heavy Truck AC Evaporator Manufacturers

Industry knowledge

The AC (air conditioning) system in heavy trucks works similarly to the AC system in cars. The evaporator is a key component of the AC system that plays a crucial role in cooling the air that circulates inside the cabin.

The AC evaporator in a heavy truck is typically a compact, multi-pass tube and fin design that is located inside the truck's HVAC (heating, ventilation, and air conditioning) unit. The evaporator is usually made of aluminum, which is a good conductor of heat and provides good corrosion resistance.

The AC evaporator consists of a series of small tubes that are arranged in a grid pattern and bonded to thin aluminum fins. The refrigerant flows through these tubes, while the air blown by the blower fan passes over the fins, allowing the heat to transfer from the air to the refrigerant.

To maximize the heat transfer between the air and refrigerant, the evaporator tubes and fins are designed to have a large surface area. The fins are usually spaced closely together to increase the surface area, and the tubes are often made of a thin, lightweight material to allow for greater heat transfer.

The evaporator also contains an expansion valve or orifice tube, which regulates the flow of refrigerant into the evaporator to ensure that it doesn't become too cold and cause the evaporator to freeze over.

How the AC evaporator in a heavy truck works:

    The AC system compresses refrigerant gas, which raises its temperature and pressure.

    The high-pressure refrigerant is then routed to the evaporator, where it enters as a liquid and is allowed to expand into a gas.

    As the refrigerant expands, it absorbs heat from the air passing over the evaporator coils.

    The now-cooled air is then blown into the cabin by the AC blower fan.

    The refrigerant gas, now at a lower temperature, is then routed to the condenser, where it is compressed back into a liquid and the heat absorbed during the process is expelled to the outside air.

    The cycle continues as the refrigerant is circulated through the AC system, absorbing heat from the cabin air and expelling it to the outside.

In summary, the AC evaporator in a heavy truck is responsible for absorbing heat from the cabin air and cooling it down before the cooled air is circulated back into the cabin.