High-precision measurement system for air resistance of heat exchanger in open environment

The invention discloses a high-precision measuring system for air resistance of a heat exchanger in an open environment, which comprises a scaling connecting pipe, a first equal-diameter pipe, an air volume measuring box and a fan which are fixedly communicated in sequence, and one end, far away from the first equal-diameter pipe, of the scaling connecting pipe is communicated with an air outlet of the heat exchanger. Through the connection among the scaling connecting pipe, the first equal-diameter pipe, the air volume measuring box and the fan, the fan provides air volume for the air volume measuring box, the air volume value of the heat exchanger is measured through the long-diameter nozzle and the third static pressure ring in the air volume measuring box, and after the air volume value of the heat exchanger is stable, the air resistance of the heat exchanger is measured. Pressure loss between the second static pressure ring and the air outlet of the heat exchanger is considered in the heat exchanger air