Filter holding frame with adjustable clamping mechanism and slot for pre-filter
Embodiments of the invention generally provide a filter frame assembly adapted for clamping in a housing is provided. The frame assembly includes a frame having a downstream frame member coupled to a cross-member, the downstream frame member and cross-member adapted to fit within the housing. At least two clamp mechanisms are coupled to frame assembly. Each of the clamp mechanisms include a rotatable rod coupled to a handle which is used to displace the frame assembly. The handle is configured to be clear of a filter receiving aperture defined above the cross-member when the handle is in both of an open or a closed position.
1. A method for installing one or more filters in an air duct, comprising:
disposing a final filter in a housing; and
clamping the final filter in the housing with a frame assembly, having a pre-filter slot defined in the frame assembly, wherein the pre-filter slot is accessible to receive a pre-filter before and after clamping, but inaccessible to receive a pre-filter while moving between clamped and unclamped positions.
2. The method of claim 1 , further comprising:
adjusting a throw of the frame assembly.
3. The method of claim 1 , wherein clamping comprises moving the frame assembly in a linear direction.
4. The method of claim 1 , wherein the frame assembly comprises at least one rectangular frame having a planar sealing surface disposed about a circumference of an upstream side of the rectangular frame to contact a perimeter of a pre-filter disposed in the pre-filter slot.
5. The method of claim 1 , wherein clamping further comprises:
moving a handle to displace the frame assembly, the handle obstructing the pre-filter slot while the frame assembly is in between a fully clamped position and a fully unclamped position.
6. The method of claim 5 , wherein the handle is clear of the pre-filter slot while the frame assembly is in the fully clamped position and the fully unclamped position.
7. The method of claim 5 , wherein the frame assembly further comprises:
a downstream frame member coupled to a cross-member, each of the downstream frame member and cross-member adapted to fit within the air duct; and
an upstream frame member coupled to the cross-member to the downstream frame member being spaced apart from the upstream frame member.
8. The method of claim 7 , wherein the downstream frame member comprises a rectangular, ring-shaped, planar sealing surface.
9. The method of claim 1 , wherein clamping further comprises:
moving a handle that actuates the frame assembly across the pre-filter slot.
10. The method of claim 1 , further comprising:
inserting the pre-filter in the pre-filter slot while the frame assembly is in the clamped position.
11. The method of claim 1 , further comprising:
inserting the pre-filter in the pre-filter slot while the frame assembly is in the unclamped position.