Filter housing and intermediate floor

Abstract

The invention relates to a filter housing (1), comprising a receptacle (11) for holding a filter module of a vehicle, an inlet (7) for feeding unfiltered fluid to an unfiltered side (9) of the filtermodule, an outlet (8) for leading away filtered fluid from a filtered side (10) of the filter module, a passage opening (3) for establishing fluid communication between the outlet (8) and the filteredside (10) of the filter module, a bypass opening (4) for establishing fluid communication between the outlet (8) and the unfiltered side (9) of the filter module, a first non-return element (5) for selectively closing the passage opening (3), and a second non-return element (6) for selectively closing the bypass opening (4), the first non-return element (5) blocking fluid flow from the outlet (8)of the filter housing (1) to the filtered side (10) of the filter module, and the second non-return element (6) blocking fluid flow from the unfiltered side (9) of the filter module to the outlet (8)of the filter housing (1). The invention further relates to an intermediate floor for inserting between a filter module and a filter housing (1) of a vehicle, the filter module being insertable intoa receptacle (11) of the filter housing (1), the intermediate floor comprising a passage opening (3) for establishing fluid communication between an outlet (8) and a filtered side (10) of the filter module, a bypass opening (4) for establishing fluid communication between the outlet (8) and a filtered side (9) of the filter module, a first non-return element (5) for selectively closing the passageopening (3), and a second non-return element (6) for selectively closing the bypass opening (4), the first non-return element (5) blocking fluid flow from the outlet (8) of the filter housing (1) tothe filtered side (10) of the filter module, and the second non-return element (6) blocking fluid flow from the unfiltered side (9) of the filter module to the outlet (8) of the filter housing (1).

Description

technical field

[0001] The invention relates to a filter housing. Furthermore, the invention relates to an intermediate base introduced between the filter module and the filter housing. A filter module, in particular a filter module for filtering fluids of a motor vehicle, is particularly advantageous for filtering fuel and / or urea solutions. Within the scope of the present invention, the terms "having" and "including" are used synonymously. Background technique

[0002] A filter module is known from the prior art. Such filter modules are commonly used in vehicles in order to filter the urea solution required in the vehicle to reduce nitrogen oxide emissions. However, urea solutions can freeze at low temperatures and thus damage the ice pressure in the filter module. Therefore, it is provided in the vehicle that the entire system for injecting the urea solution is emptied when the vehicle is stationary. To do this, the pumping direction must be reversed so that the enti...

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