Compressor: The heart of the TRU, the compressor compresses and circulates the refrigerant gas, raising its temperature and pressure. This process is crucial for the heat exchange that enables cooling.
Condenser: The condenser cools the high-pressure, high-temperature refrigerant gas by transferring the heat to the outside air, converting it into a liquid state.
Expansion Valve: This component meters the flow of the refrigerant liquid into the evaporator, reducing its pressure and temperature, preparing it for the heat absorption process.
Evaporator: Inside the transport vehicle, the evaporator absorbs heat from the air surrounding it, converting the refrigerant liquid back into a gas and thereby cooling the enclosed space.
Control System: A sophisticated electronic control system monitors and regulates the temperature, humidity, and other parameters within the cargo space, ensuring accurate and reliable operation. Modern TRUs often include remote monitoring and diagnostic capabilities for enhanced efficiency and maintenance.
Power Supply: TRUs can be powered by the engine of the towing vehicle (diesel or electric) or by an independent power source like a generator or battery system, allowing them to operate even when the vehicle is stationary.
