Filter element having two filter media

Abstract

The invention relates to a filter element (1), comprising a first filter medium (2) and a second filter medium (3), wherein the filter element (1) has an non-filtering side (4), via which a fluid canbe input, and a filtering side (5), via which the fluid can be output, wherein the first filter medium (2) and the second filter medium (3) are arranged between the non-filtering side (4) and the filtering side (5), and wherein the first filter medium (2) has a lower relative pressure drop than the second filter medium (3) in a fluid flow direction from the filtering side (5) to the non-filteringside (4).

Description

technical field [0001] The invention relates to a filter element. Furthermore, the invention relates to a filter module comprising such a filter element. It is provided here that fluid can be filtered by the filter element. Background technique [0002] Filter elements are known from the prior art. The filter element is used if the system to be supplied with the working fluid reacts sensitively to contamination of the working fluid. With the filter module, such contamination can be avoided. In particular, such filter elements are used in motor vehicles for filtering urea or fuels such as diesel or petrol, which are respectively used as the operating medium of the vehicle. [0003] Depending on the freezing point of the fluid to be filtered, it can happen that the fluid (eg urea solution) freezes or coagulates (eg diesel) at low outside temperatures. In order to prevent this, the filter module and / or the filter element can be designed as a heatable structure, which incre...

AI Technical Summary

Problems solved by technology

However, this can lead to the situation that the working fluid flows through the filter element in the return flow and the filtered particles are thus loosened from the filter element.

Loose particles can then reach the pump and damage it

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