Fresh air system for toll booth

The utility model relates to the technical field of toll booth. The utility model relates to a fresh air system for a toll booth. The sentry box comprises a sentry box body, a fresh air machine, an air inlet part, an air return part, an air outlet part, a guide pipeline, an ion air curtain machine and a mounting mechanism, the top of the fresh air fan is fixedly connected with the left side of thetop of the sentry box body through a hanging rod, the air inlet part is located on the left side of the sentry box body, the right end of the air inlet part is fixedly communicated with an air inletof the fresh air fan, the air return part is located on the right side of the fresh air fan, and the two air outlet parts are located on the front face and the back face of the fresh air fan respectively. According to the utility model, the purpose of keeping clean air in the toll booth all the time is achieved; and meanwhile, the loss of energy consumption of the air conditioner is avoided, a relatively clean environment