What does Hitachi's patented secondary defrosting for central air conditioning mean?

On the basis of ordinary defrosting, secondary defrosting is carried out to improve the defrosting effect and save energy. The secondary defrosting of Hitachi central air conditioning is a patented technology, which means that after the traditional defrosting operation, the defrosting effect can be further improved and the frost on the evaporator can be removed more thoroughly. Ensure the refrigeration effect and operation efficiency of the air conditioner. At the same time, the technology can also intelligently adjust the defrosting time and frequency to achieve the purpose of energy saving.