MOTIVE FLUID NOZZLE AND SURFACE CLEANING HEAD HAVING A MOTIVE FLUID NOZZLE

The invention relates to a motive fluid nozzle (56) for a jet pump (44) of a surface cleaning head (10). The motive fluid nozzle (56) has a nozzle body (78) which has a nozzle outlet opening (92). In order to develop the motive fluid nozzle in such a way that good suction as well as low consumption of cleaning liquid is possible, the nozzle body (78) has an interior space (80) having a conical end portion (90) at the tip of which the nozzle outlet opening (92) is arranged, wherein a nozzle insert (94) is arranged in the end portion (90), which insert has a cylindrical base (96) to which a truncated-cone-shaped extension (98) is connected, the lateral surface (104) of which form-fittingly abuts an inner wall (106) of the end portion (90), wherein the nozzle insert (94) has a through-channel (100) which is aligned with the nozzle outlet opening (92) and a plurality of swirl channels (108) which are moulded into the lateral surface (104) of the extension (98), wherein the through-channel (100) opens into a swirl chamber (110) immediately upstream in the conical end portion (90) of the nozzle outlet opening (92), and the swirl channels (108) open, offset laterally to the through-channel (100), into the swirl chamber (110), wherein the flow cross-section of the nozzle outlet opening (92) is at most one third of the sum of the flow cross-sections of the through-channel (100) and the swirl channels (108). The invention also relates to a surface cleaning head (10) having such a motive fluid nozzle (10).