Vehicle air conditioning system

A vehicle air conditioning system, comprising:

• a dehumidifying device comprising:
• a honeycomb structure having an outer peripheral wall and partition walls disposed on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells extending from a first end face to a second end face to form a flow path, at least the partition walls being made of a material having a PTC property;
• a pair of electrodes provided on the first end face and the second end face;
• and a dehumidifying layer formed on a surface of each of the partition walls;
• a power source for applying voltage to the pair of electrodes;
• an inflow pipe for allowing air from a vehicle interior or a vehicle exterior to flow into the dehumidifying device;
• a first outflow pipe for returning the air that has been dehumidified by the dehumidifying device to the vehicle interior;
• a second outflow pipe through which the air containing moisture released by a regeneration process of the dehumidifying device is circulated;
• and
• a switching valve provided at a branch portion between the first outflow pipe and the second outflow pipe, the switching valve being capable of switching the flow of the air to the first outflow pipe or the second outflow pipe,
• wherein a mist separator comprising a filter for removing the moisture is provided in the second outflow pipe, and
• wherein the second outflow pipe merges with the first outflow pipe on a downstream side of the mist separator.