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The invention relates to a cooling agent condenser (1) which comprises a finned tube block (2), collecting tubes (5) arranged on both sides thereof and a manifold (6) which is disposed in a parallel position with respect to the collecting tube (5) and connected to a cooling agent and said collecting

The invention relates to a cooling agent condenser (1) which comprises a finned tube block (2), collecting tubes (5) arranged on both sides thereof and a manifold (6) which is disposed in a parallel position with respect to the collecting tube (5) and connected to a cooling agent and said collecting tube (5) by means of an overflow opening (8, 9). Said manifold is embodied in the form of a monoblock tube.

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The invention claimed is: 1. A refrigerant condenser for a motor vehicle air-conditioning system, comprising: a tube/rib block; at least one header tube arranged on one side or header tubes arranged on both sides; and also a header which is arranged parallel to a header tube and which is in refrige

The invention claimed is: 1. A refrigerant condenser for a motor vehicle air-conditioning system, comprising: a tube/rib block; at least one header tube arranged on one side or header tubes arranged on both sides; and also a header which is arranged parallel to a header tube and which is in refrigerant connection with the header tube via overflow orifices and is designed as a one-piece tube, wherein the overflow orifices are designed as rim holes which form overflow ducts. 2. The condenser as claimed in claim 1, wherein the tube is designed as a welded tube. 3. The condenser as claimed in claim 1, wherein the tube is produced by extrusion. 4. The condenser as claimed in claim 1, wherein the tube is designed as a folded tube. 5. The condenser as claimed in claim 1, wherein the tube is produced by reverse extrusion. 6. The condenser as claimed in claim 1, wherein the rim holes are arranged on the tube of the header and are directed outward. 7. The condenser as claimed in claim 1, wherein the rim holes are arranged on the header tube and are directed inward or outward. 8. The condenser as claimed in claim 1, wherein the rim holes of the tube and header tube have different cross sections in size and are designed to engage telescopically one into the other. 9. The condenser as claimed in claim 1, wherein the rim holes of the tube and header tube are arranged so as to butt onto one another and, in particular, have an identical end cross section. 10. The condenser as claimed in claim 9, wherein the rim holes are encased in each case by a tubular sleeve. 11. The condenser as claimed in claim 9, wherein the rim holes receive a sleeve radially on the inside. 12. The condenser as claimed in claim 9, wherein the overflow orifices are provided with tabs which point out of the header tube and/or tube. 13. The condenser as claimed in claim 9, wherein between the header tube and tube is arranged at least one intermediate piece with bores which receive the rim holes or tabs, the bores being designed, in particular, continuously or as stepped bores. 14. The condenser as claimed in claim 1, wherein the overflow orifices are designed as tubular pieces which are inserted into plug-in orifices arranged in the tube and header tube and which form overflow ducts. 15. The condenser as claimed in claim 12, wherein the tubular pieces have a bead arranged approximately centrally and between the header tube and tube. 16. The condenser as claimed in claim 1, wherein the overflow orifices are formed by passage bores in a connection piece which is arranged between the tube and header tube. 17. The condenser as claimed in claim 1, wherein the overflow orifices are formed by outwardly directed shaped-out portions arranged on the tube and on the header tube and having a preferably annular contact face. 18. The condenser as claimed in claim 1, wherein the tube and header tube are fixed to one another by joining. 19. The condenser as claimed in claim 14, wherein the header tube and the tube and also the connection piece are fixed to one another by tacking. 20. The condenser as claimed in claim 1, wherein the overflow orifices are formed by a plurality of parallel-connected individual orifices. 21. The condenser as claimed in claim 1, wherein the header tube is of two-part design and has a bottom part for receiving the tube ends and a cover part in which the overflow orifices are arranged. 22. The condenser as claimed in claim 1, wherein the header tube and tube are additionally fixed to one another by means of at least one common cover.