Method for detecting the cleanliness of a filter
First Claim
1. A method for detecting a cleanliness of a filter, the filter being disposed on an air inlet or an air outlet of a fan, the method comprising:
- outputting a rotation control voltage to the fan, wherein an airflow generated by the rotation of the fan flows through the filter;
detecting an actual rotation rate of the fan;
calculating an actual dust value f1 according to the actual rotation rate and the rotation control voltage;
providing a dust upper limit value fm of the filter; and
determining the cleanliness of the filter according to the actual dust value f1 and the dust upper limit value fm.
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Abstract
A method for detecting the cleanliness of a filter. The filter is disposed on an air inlet or an air outlet of a fan. The method includes the following steps. At first, outputting a rotation control voltage to the fan, and an airflow generated by the rotation of the fan flows through the filter. Then, detect an actual rotation rate of the fan, and calculate an actual dust value f1 according to the actual rotation rate and the rotation rate control voltage. Then, a dust upper limit value of the filter is defined. Finally, the cleanliness of the filter is determined according to the actual dust value and the dust upper limit value.
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Citations
13 Claims
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1. A method for detecting a cleanliness of a filter, the filter being disposed on an air inlet or an air outlet of a fan, the method comprising:
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outputting a rotation control voltage to the fan, wherein an airflow generated by the rotation of the fan flows through the filter;
detecting an actual rotation rate of the fan;
calculating an actual dust value f1 according to the actual rotation rate and the rotation control voltage;
providing a dust upper limit value fm of the filter; and
determining the cleanliness of the filter according to the actual dust value f1 and the dust upper limit value fm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification