Abstract: The invention relates to a fixing device (8) for a expansion valve (4) of a motor vehicle air-conditioning system (1), said expansion valve (4) being connected to two lines (5, 6). The two lines (5, 6) are positioned in relation to each other by means of a line positioning element (7) which is embodied as a sheet metal stamped part, said line positioning element comprising two slits which are used to receive the lines. The expansion valve (4) can be arranged on the housing (2), with the aid of the line positioning element (7), and can be fixed in an at least rotationally fixed manner, wherein one part of the motor vehicle air-conditioning system (1) is arranged.

Abstract: The invention relates to a heat exchanger, in particular a capacitor (1) for an air conditioning system, in particular in motor vehicles. Said heat exchanger comprises at least one collector pipe (4) and at least one connection flange (9) which has a material connection with the collector pipe (4) and communicates therewith. The collector pipe (4) comprises a collar (8) and the connection flange (9) comprises a boring (10) wherein the collar (8) can be connected in front of the material fit. The invention is characterised in that the collar (8) can be fixed by a reshaping by means of a stamp having a polygonal cross-section.