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Ventilation apparatus and method for filter dirt detection

  • US 10,343,097 B2
  • Filed: 08/13/2015
  • Issued: 07/09/2019
  • Est. Priority Date: 08/15/2014
  • Status: Active Grant
First Claim
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1. A ventilation apparatus with filter dirt detection, comprising:

  • a main body comprising an air entry and an air exit at two sides of the main body respectively;

    a filter behind the air entry for filtering air flowing into the main body via the air entry and the filter;

    a fan;

    a motor connected to the fan, the motor being configured to operate under different motor rotation speeds such that the fan is caused to rotate;

    a motor sensor module connected to the motor, the motor sensor module being configured to sense a current motor rotation speed of the motor and to generate corresponding rotation speed data;

    a pressure sensor module between the filter and the air exit, the pressure sensor module being configured to;

    sense a static pressure value of the main body before enabling the ventilation apparatus;

    sense multiple initial pressure values of the main body respectively corresponding to each of the motor rotation speeds when the ventilation apparatus is just enabled; and

    continuously sense a working pressure value of the main body after the ventilation apparatus is enabled; and

    an analysis monitor device configured to;

    wirelessly receive the static pressure value, the multiple initial pressure values, the working pressure value and the rotation speed data;

    calculate multiple reference pressure offset values, based on the static pressure value and the multiple initial pressure values, and respectively corresponding to each of the motor rotation speeds;

    calculate a working pressure offset value based on the static pressure and the working pressure;

    identify a predetermined pressure offset range based on the rotation speed data;

    identify a corresponding one of the multiple reference pressure offset values based on the rotation speed data;

    calculate an operating status offset value between the corresponding one of the multiple reference pressure offset values and the working pressure offset value; and

    generate a warning message related to the filter if the operating status offset value is within the predetermined pressure offset range.

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