Fluid filter with secondary filter element of lightweight construction

A fluid filter, secondary filter technology, applied in membrane filters, dispersed particle filtration, gas treatment, etc., that can address limiting seal abutment, secondary filter element and filter housing manufacturing tolerances, filter media Easy to damage and other problems, to achieve the effect of easy and safe installation

Pending Publication Date: 2020-12-22
MANN HUMMEL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the secondary filter element is mounted to the holding structure, the filter medium may be easily damaged so that there is a risk of dirt particles entering the clean side of the fluid filter during replacement of the primary filter element
This can lead to damage to other components such as the combustion engine of the motor vehicle or a fluid pump fluidly connected to the combustion engine
Furthermore, due to manufacturing tolerances of the secondary filter element and filter housing, the sealing abutment of the filter medium engaging against one of the groove flanks of the retaining structure is inevitably limited.

Method used

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  • Fluid filter with secondary filter element of lightweight construction
  • Fluid filter with secondary filter element of lightweight construction
  • Fluid filter with secondary filter element of lightweight construction

Examples

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Embodiment Construction

[0028]referenceFigure 1 to Figure 3 , A fluid filter 10 according to the present invention is shown, and the fluid filter 10 can be used, for example, as an air filter for an air inlet of a combustion engine (specifically, a utility vehicle such as a truck or a bulldozer). infigure 1 , The fluid filter 10 is shown in its partially assembled state, andfigure 2 withimage 3 An exploded view of the fluid filter 10 is shown. The fluid filter 10 includes a multi-part filter housing 12 having a filter container 14 extending along the longitudinal axis 16 of the filter housing 12, the filter container 14 being only partially shown infigure 1 in. There is a housing cover 18 provided at one end of the filter container 14 for closing the opening 20 of the filter container 14. The housing cover 18 is detachably locked and fixed to prevent loosening on the filter container 14, which can be achieved, for example, by a snap fit of the housing cover 18 and the filter container 14, threaded engageme...

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Abstract

The invention relates to a fluid filter (10) for filtering a fluid, in particular air, comprising a filter housing (12) having a central support tube (22) which extends along a longitudinal axis (16)of the filter housing (12) within the filter housing (12) and a primary filter element (24) arranged inside the filter housing (12) in an exchangeable manner. There is a secondary filter element (26)positioned inside the filter housing (12) which serves as a safety-element during a replacement of the primary filter element (24). A sealing between a first end portion of the secondary filter element (26) and the filter housing (12) is effected partially or solely by the filter medium (28) of the secondary filter element (26). The first end portion of the secondary filter element may engage in agroove-shaped retaining structure of the filter housing (12). The invention further relates to a secondary filter element (26) for such a fluid filter (10).

Description

Technical field[0001]The present invention relates to a fluid filter for filtering fluid, in particular air, which has a secondary filter element of lightweight construction.Background technique[0002]DE 10 2015 004 965 A1 discloses a fluid filter which can be used to filter air and which comprises a filter housing with an integrated central support tube. The central support tube extends within the filter housing along the longitudinal axis of the filter housing. Known fluid filters have: a primary filter element, which is arranged in a replaceable manner inside the filter housing, and an auxiliary or secondary filter element, which is positioned at least partially inside the primary filter element. The two filter elements are arranged coaxially with respect to the longitudinal axis of the filter housing, so that the fluid to be filtered can successively flow through the filter medium of the primary filter element in a radial direction from the outside to the inside and then flow thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D46/24
CPCB01D46/2414B01D2265/028B01D2271/025B01D2271/027B01D2279/60B01D46/64
Inventor T·弗里茨欣格P·内夫M·沙尔马P·库马雷桑S·文卡特拉曼J·舒尔特
Owner MANN HUMMEL GMBH
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