Experimental study on application of frequency control to constant temperature and humidity air conditioner with high precision

Treats the application feasibility in this field. The test results show that the sample machine can maintain the temperature control precision in the range of 0.3 to 0.5 ℃ and relative humidity 2 percent to 3 percent, the sample machine can stably operate for longer time and its energy efficiency ratio is about 12.3 percent higher than that of the conventional unit in the nominal working condition set in the Chinese national standard.