Filter having media packs arranged in a V-shape and protective grid

Patent metadata

Field	Value
Publication number	US-12539481-B2
Application number	US-202318348375-A
Country	US
Kind code	B2
Filing date	Jul 7, 2023
Priority date	Jul 14, 2022
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A cassette filter including a plurality of filter media packs, a frame for receiving the filter media packs, and protective grids. Two filter media packs in each case are arranged in a v-shape, and a gas flows through the filter media packs from a dirty gas side of the filter to a clean gas side of the filter in order to clean the gas. A respective protective grid of the protective grids is arranged on each filter media pack on the clean gas side. The protective grids have a grid structure with substantially closed curves of different sizes arranged centrically around at least one centre of the protective grid and with a plurality of connectors, which are oriented radially with respect to the centre of the protective grid and connect the closed curves to one another.

First claim

The invention claimed is:

1 . A cassette filter comprising:
a plurality of filter media packs,
wherein two filter media packs in each case are arranged in a v-shape, and a gas flows through the filter media packs from a dirty gas side of the filter to a clean gas side of the filter in order to clean the gas;
a frame for receiving the filter media packs; and protective grids, wherein a respective protective grid of the protective grids is arranged on each filter media pack on the clean gas side, wherein the protective grids have a grid structure with substantially closed curves of different sizes arranged centrically around at least one centre of the protective grid and with a plurality of connectors, which are oriented radially with respect to the centre of the protective grid and connect the closed curves to one another.

2 . The cassette filter according to claim 1 , wherein the closed curves are designed as concentric ovals, in particular as circles or ellipses.

3 . The cassette filter according to claim 1 , wherein the closed curves are designed as concentric polygons or as spiral shapes.

4 . The cassette filter according to claim 1 , wherein the connectors between in each case a first and a second closed curve are arranged radially offset with respect to connectors between the second closed curve and a subsequent closed curve.

5 . The cassette filter according to claim 1 , wherein the closed curves in edge regions of the protective grids are formed by segments of the closed curves.

6 . The cassette filter according to claim 1 , wherein at least some of the closed curves have isolated interruptions.

7 . The cassette filter according to claim 1 , wherein the closed curves are arranged centrically around one, two, three or four centres.

8 . The cassette filter according to claim 1 , wherein each protective grid is surrounded by an interrupted edge strut.

9 . The cassette filter according to claim 1 , wherein each protective grid is formed in one piece.

10 . The cassette filter according to claim 1 , wherein the protective grids are connected to the frame in a materially bonded manner.

11 . The cassette filter according to claim 6 , wherein the isolated interruptions are in edge regions of the protective grids.

12 . The cassette filter according to claim 9 , wherein each protective grid is an injection molded part.

Assignees

• Freudenberg Carl Kg

Inventors

• Schumacher Sascha
• Weber Patrick
• Schroth Thomas
• Tapper Renate
• Fritz Florian

Classifications

• B01D2265/06

  Details of supporting structures for filtering material, e.g. cores · CPC title

• B01D46/58

  connected in parallel · CPC title

• B01D46/521

  using folded, pleated material · CPC title

• B01D46/121 Primary

  V-type arrangements · CPC title

• B01D46/0002

  Casings; Housings; Frame constructions · CPC title