Filter module and filter assembly

Patent metadata

Field	Value
Publication number	US-11603814-B2
Application number	US-202017122354-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Dec 16, 2019
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

A filter module for a filter assembly has a primary filter element and a secondary filter element. A water separation interface is provided for discharging water, which has been separated by the primary filter element from a fluid to be filtered, from the primary filter element. A primary filter interface is provided for discharging fluid, which has been filtered by the primary filter element, from the primary filter element. A secondary filter interface is provided for discharging the fluid, which has been filtered by the secondary filter element, from the secondary filter element. The water separation interface, the primary filter interface, and the secondary filter interface are arranged coaxially to a symmetry axis of the filter module. The water separation interface, the primary filter interface, and the secondary filter interface are each designed for outflow of material flows in axial direction of the symmetry axis.

First claim

What is claimed is:

1. A filter module for a filter assembly, the filter module comprising:
a primary filter element, comprising:
an annular primary filter medium surrounding a central axis, the central axis defining an axial direction;
an annular water separation unit comprising a coalescing filter medium arranged in an interior of the primary filter element, a lower axial end of the annular water separation unit forming a primary filter interface;
a bottom end disk arranged on an axial bottom end face of the annular primary filter medium, the bottom end disk having a water separation interface formed as a tubular axial projection projecting outwardly on an axially bottom side of the bottom end disk, an interior of the water separation interface in fluid communication with an interior of the annular primary filter medium;
wherein the water separation interface is configured to discharge water, the water having been separated by the primary filter element from a fluid (F) to be filtered from the primary filter element;

a secondary filter element arranged above the primary filter element relative to a direction of gravity, the secondary filter element comprising:
an annular secondary filter medium surrounding the central axis;

an end disk arranged between and connected directly or indirectly to a bottom end face of the annular secondary filter medium and an upper end face of the annular primary filter medium;
a tubular stand pipe arranged on the end disk and projecting axially downwardly away from the end disk into an interior of the annular primary filter medium, an interior of the tubular stand pipe in fluid communication with an interior of the annular secondary filter medium;
wherein an axial bottom end of the tubular stand pipe forms a secondary filter interface discharging filtered fluid from the interior of the annular secondary filter medium;
wherein the tubular stand pipe extends through the interior of the annular primary filter medium to a lower axial end forming a secondary filter interface radially within an interior of the water separation interface;
wherein the water separation interface, the primary filter interface, and the secondary filter interface are each configured to provide an axial outflow of material flows in the axial direction of the central axis of the filter module;
wherein the secondary filter interface is radially surrounded by the primary filter interface which is radially surrounded by the water separation interface in a region of the bottom end disk of the primary filter element; wherein the primary filter element is a prefilter element and is arranged fluidically upstream of the secondary filter element and configured such that the fluid (F) flows in sequence first through the primary filter element and then the secondary filter element; wherein the primary filter interface is a prefilter interface, wherein the secondary filter element is a main filter element, and the secondary filter interface is a main filter interface.

2. The filter module according to claim 1 , wherein
the water separation interface, the primary filter interface, and the secondary filter interface are concentrically arranged relative to each other.

3. The filter module according to claim 1 , wherein
the water separation interface, the primary filter interface, and the secondary filter interface, viewed along the symmetry axis of the filter module, are positioned axially displaced relative to each other.

4. The filter module according to claim 1 , further comprising
a venting interface arranged coaxially in relation to the symmetry axis.

5. The filter module according to claim 4 , wherein,
in relation to a radial direction of the filter module, the venting interface is arranged radially inside the secondary filter interface.

6. The filter module according to claim 4 , wherein
the venting interface is recessed in the axial direction in relation to the water separation interface, the primary filter interface, and the secondary filter interface.

7. The filter module according to claim 4 , wherein
the venting interface is recessed in the axial direction and concentrically arranged in relation to the water separation interface, the primary filter interface, and the secondary filter interface.

8. The filter module according to claim 4 , wherein
the venting interface is concentrically arranged in relation to the water separation interface, the primary filter interface, and the secondary filter interface.

9. The filter module according to claim 1 , wherein
the secondary filter interface extends at least in sections through the primary filter element.

10. The filter module according to claim 1 , wherein
the primary filter element and the secondary filter element are connected with form fit to each other to form the filter module.

11. The filter module according to claim 1 , wherein
the primary filter element and the secondary filter element are welded or fused to each other.

12. The filter module according to claim 1 , wherein
the annular filter medium is folded in a star shape.

13. The filter module according to claim 1 , wherein
the primary filter element and/or the secondary filter element comprise a hollow cylindrical construction.

14. A filter assembly comprising:
a filter housing;
a filter module according to claim 1 exchangeably received in the filter housing.

15. A filter assembly according to claim 14 , wherein the filter assembly is a fuel filter assembly.

Assignees

• Mann & Hummel Gmbh

Inventors

• Speidel Gerrit-Tobias
• Talmon-Gros Dietmar
• Eble Jonas
• Spelter Lars
• Baumann Christoph

Classifications

• B01D46/521

  using folded, pleated material · CPC title

• F01M11/03

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title

• B01D46/62

  connected in series · CPC title

• F02M37/32 Primary

  characterised by filters or filter arrangements · CPC title

• B01D2201/4038

  for connecting at least two filtering elements together · CPC title