Fan air-return-preventing system and fan air-return-preventing method

Fan air-return-preventing system and fan air-return-preventing method

  • CN 104,682,814 A
  • Filed: 11/29/2013
  • Published: 06/03/2015
  • Est. Priority Date: 11/29/2013
  • Status: Active Application
First Claim
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1. a fan anti-air-return system, comprising:

  • One fan motor;

    One Drive and Control Circuit, is electrically connected this fan motor, and this Drive and Control Circuit has a drive singal, and according to this drive singal, this fan motor is rotated;

    AndOne turns to decision circuitry, and it detects this fan motor when rotating backward, and exports one and judges that signal is to this Drive and Control Circuit;

    Wherein this Drive and Control Circuit performs brake according to this judgement signal, and when this turns to decision circuitry to detect the non-return rotation of this fan motor, this Drive and Control Circuit drives this fan motor to operate.

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