120 is the front and rear compartments of the negative pressure vehicle ventilated?

120 front and rear compartments of negative pressure vehicle are ventilated. The negative pressure ambulance makes the air pressure in the carriage lower than the external atmospheric pressure through the negative pressure exhaust purification device. When the air flows, it can only flow from the high-pressure side outside the carriage to the low-pressure side inside the carriage, which accelerates the ventilation in the carriage and can effectively reduce the spread of infectious biological factors in the carriage and the harm caused to the environment by its outward spread. Therefore, it is necessary to open the negative pressure device when transporting infected patients, and even to fix the patients in the negative pressure isolation cabin. Therefore, the air in the front and rear compartments of the 120 negative pressure vehicle is ventilated.