Dual evaporator air conditioning system`s pressure-reducing module for use in motor vehicle, has three-way distribution valve connected to pressure-reducing device and adjusting proportion of fluid delivered to evaporators

摘要

The module (12) has an inlet receiving a fluid e.g. supercritical refrigerant such as carbon dioxide, from a gas cooler (11) and a pair of outlets delivering the fluid to one of two evaporators (131, 132). The inlet and the outlets connect the module to an air conditioning circuit (10). A three-way distribution valve is connected to a pressure-reducing device and to the outlets, and adjusts the proportion of fluid delivered to the evaporators. The device and the valve are assembled together as a unitary module. A pressure relief valve is placed between the device and the valve. An independent claim is also included for a method for controlling an air conditioning circuit.