| 摘要 |
An air filter unit of the pleated media, high efficiency type wherein the media pleat edges are sealed to the supporting frame to prevent bypass of air with a ceramic adhesive and fibrous ceramic mat which allows the unit to be exposed to high temperatures (e.g., up to 2000 DEG F.) without danger of seal breakdown. While in the form of a slurry the adhesive is applied, for example, with a trowel to the zig-zag pleated edges of the media which, together with corrugated spacers, forms the filter core. The latter is then surrounded on four sides by the compressible mat of fibrous ceramic material and inserted in a box-like support frame with the slurry filling the space between the pleated edges of the media and the fibrous mat. The filter core and surrounding mat are assembled with the support frame while the slurry is still wet whereby, upon hardening, the resulting layers of ceramic cement provide a complete, heat-resistant seal while avoiding cracking in normal handling due to the resilience of the compressed fibrous mat which maintains an airtight seal between hardened ceramic and support frame. |
