| 摘要 |
An air filter screen has a corrugated composite screen securely enclosed in a sectional frame. The sectional frame has two first beams respectively attached on first and third side-edges of the composite screen, two second beams respectively attached on second and fourth side-edges of the composite screen, and four right-angle connectors respectively combine the first beams together with the second beams, whereby the composite screen is enclosed in the combined sectional frame. When the composite screen needs to be replaced, the sectional frame is able to be separated, the old composite screen is detached from the opened sectional frame, and then after fitting a new composite screen with the sectional frame, the sectional frame is combined together again, so as to reduce cost of the air filter screen and help environmental protection.
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