| 摘要 |
PURPOSE: An air purifying filter is provided to overcome the imbalance of a wind pressure in a filter by forming pressure balancing holes at a filter element and connecting both sides of the filter element. CONSTITUTION: An air purifying filter includes a filter element(10), a plurality of protrusions(11), and an air path. The filter element is formed by charging a polymer synthetic resin film, and the protrusions are simultaneously formed. The polymer synthetic film is wound in a cylindrical form in order to form the air path which is in parallel with the flowing direction of air. Pressure balancing holes(13) connecting both sides of the filter element are formed between the protrusions.
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