Portable ventilation multi-parameter tester

The utility model discloses a portable ventilation multi-parameter tester, which relates to the technical field of ventilation multi-parameter testers and comprises a ventilation multi-parameter tester body. Through cooperation of the ventilation multi-parameter tester body, the data display, the control key, the power connection hole, the detection table, the supporting column, the protective top disc and the ultrasonic emission head, the wind speed is measured through the Doppler effect of ultrasonic waves, the propagation direction of the ultrasonic waves emitted by the ultrasonic emission head is the same as the wind direction, and the speed of the ultrasonic waves can be increased; on the contrary, if the propagation direction of the ultrasonic waves is opposite to the wind direction, the speed of the ultrasonic waves is slowed down, so that the propagation speed of the ultrasonic waves in the air can correspond to the wind speed under a fixed detection condition, the accurate wind speed and wind directi