RETURN AIR BLOCKING DEVICE FOR VENTILATION OF THE INTERIOR OF A MOTOR VEHICLE

摘要

A return air blocking device for ventilation of the interior of a motor vehicle, with a frame or housing with at least one sealing surface and with at least one flexible valve flap mounted on the frame or the housing, which in an idle position abuts on the sealing surface and prevents a flow of air through the return air blocking device, and which, when a sufficient pressure occurs, assumes an opening position lifted from the sealing surface in which it allows a flow of air through the return air blocking device, wherein the at least one valve flap comprises at least one slit on its end mounted on the frame or housing, wherein the frame or the housing comprises at least one holding projection which engages in the at least one slit.

主权项

1. Return air blocking device for ventilation of the interior of a motor vehicle, with a frame or housing with at least one sealing surface and with at least one flexible valve flap mounted on the frame or the housing, wherein, in an idle position, the valve flap abuts on the sealing surface and blocks a flow of air through the return air blocking device, and wherein, when a sufficient pressure occurs, the valve flap assumes an opening position lifted from the sealing surface, in which it allows a flow of air through the return air blocking device, wherein the at least one valve flap comprises at least one slit on its end mounted on the frame or housing, wherein the frame or the housing comprises at least one holding projection, which engages in the at least one slit, and wherein, in its idle position, the at least one valve flap lies on at least one first bearing surface on its end mounted on the frame or the housing and on at least one second bearing surface on its opposing end, wherein the at least one second bearing surface is essentially parallel to the at least one first bearing surface, wherein
the at least one holding projection comprises a stop surface, wherein the at least one valve flap is held on its end mounted on the frame or housing between the stop surface and the first supporting surface such that it can essentially not pivot into the opening position, but can only reach the opening position through bending, and the stop surface, starting from the end mounted on the frame or the housing extends over a part of the surface of the at least one valve flap in the direction of the opposing end, so that upon assuming the opening position by the at least one valve flap, at least a section of the valve flap being covered by the stop surface does essentially not bend.