Abstract: Compared with the indoor air enthalpy test method, using balanced ambient room-type calorimeter to test the performance of air conditioner has the advantages of small measurement error and high precision of test results. From the aspects of device development and design, calibration, test operation, by analyzing the key factors that affect the measurement results, such as the control of environmental working conditions, the installation of the tested machine and the measurement of the inlet and outlet water temperature, it provides reference for further improving the measurement level, reducing the experimental error and ensuring the consistency and accuracy of the results.

Key words: Room air conditioner, Balanced ambient room-type calorimeter, Cooling capacity