The CO2 air conditioning system incorporates an internal heat exchanger that is installed between the outlet of the gas cooler and the evaporator. The internal heat exchanger, which is not equipped with the conventional HFC-134a, helps to further cool the CO2 refrigerant by exchanging heat with refrigerant flowing at the low-pressure side of the system. The internal heat exchanger increases the amount of liquid refrigerant flowing into the evaporator to increase the cooling performance, resulting in increased the coefficient of performance (COP = cooling capability/compressor consumption) of the system.
The internal heat exchanger is integrated with the accumulator and the expansion valve so that the structure of the CO2 air conditioning system becomes simple and easy to install. |
