Ventilation air-conditioning system of subway underground station

The utility model relates to the technical field of air conditioners, in particular to a subway underground station ventilation air-conditioning system which comprises a public area air-conditioning system and an equipment area air-conditioning system, and a cold source of the public area air-conditioning system is a water-cooling direct refrigeration air-conditioning unit and is arranged at the small end of a station; a cold source of the equipment area air conditioning system is a water-cooling multi-connected unit and is arranged at the large end of the station; a water-cooling direct refrigeration air conditioning unit of the public area air conditioning system is arranged at the position, close to the station hall/platform public area, of the small end of the station, only an air feeder is arranged, a return fan and a small fresh air fan are not arranged, and a fresh air unit is independently arranged at the large end of the station. Therefore, the problems that air conditioning systems of public areas a