| 摘要 |
An air cleaning filter for an air conditioning system comprising a rigid frame having a length, a width and a depth, to which flexible filter material is mounted, the filter material being of greater cross-sectional area than the rigid frame, and including at least two peaks and one trough therein, the maximum peak-to-trough amplitude of which is greater than the depth of the rigid frame. The length and width of the filter are adapted so as to be positioned, in use, in a direction that is substantially perpendicular to the direction of airflow of the air being filtered, whilst the depth thereof is adapted so as to be positioned, in use, in a direction that is substantially parallel to said direction of airflow.
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