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When I was in the park, I found a clear chair and then sat down. I had always been thinking that life was so changeable; I stayed with my husband yesterday and then today he vanished into the thin air. It was really incredible. I felt I was dreaming, but it was not. I pinched myself and could still pain. I heard a noise of a Novak brushless motor when I was sitting on the chair thinking the question, because there were very few people in the park and it was so quiet at that moment, so I could hear every small noise. I raised my head and I could not believe my eyes. The man riding the electric bike should have had been my husband! It was unbelievable. But behind his back, I saw a woman, who was more beautiful and younger than me, and in his eyes, he could completely abandon me according to those two points. I knew it very clearly. He stopped the motorized bicycle and greeted me. He was pale on his face and there was a little shiver in his voice. 

As to the traditional fixed-frequency air-conditioning, there are several key aspects to improving energy efficiency, the first is the efficiency of the compressor, Currently, the traditional fixed-frequency air-conditioning in the domestic market still has some vitality. The second one is the energy efficiency of heat exchangers. A heat exchanger is in indoor side (also known as the evaporator), another one in the room outside (also known as the condenser.) Two heat exchanger and compressor matching, both of them will affect the energy efficiency of air conditioning.

  In addition to the above two areas, in recent years, to improve the efficiency of air duct of the fan brush motor has become a key component of companies concerned. In fact, the air conditioning compressor also has motor inside. However, the traditional performance improvement of the compressor motor has not much meaning to improve energy efficiency improvements. But the air duct of the motor situation is different. Traditional wind tunnel motor is single phase induction motor; this motor efficiency was in about 40%, but if you use brushless DC motors, motor efficiency can reach above 75%. Therefore, the air duct portion of the motor to improve power consumption can be saved.

Although when the compressor and heat exchanger is confirmed, the general level of energy-saving air-conditioning has been confirmed, but there are air conditioning manufacturers, said air duct motor like we usually call "the last straw breaks the camel." If you tried every means, the air conditioning system efficiency value reached 3.59; in this case, if wind motor single induction motor replaced by brushless DC motor, the value of energy efficiency could reach 3.61, thus, air condition will reach a new level of energy efficiency standards. Therefore, in the current technology to fight to a certain extent, wind tunnel technology to change the motor direction to be the most crucial part. So use brushless motor to manufacturing the fan is the trends of era.