Abstract: A steam generator (1) comprises a body (20) in which a spiral-shaped groove (30) is arranged, as well as a connection channel (32) which provides access to an end portion (33) of the spiral-shaped groove (30) from a circumferential surface (21) of the body (20). For the purpose of closing the spiral-shaped groove (30), a cover is provided, which has a hole for providing access to a central portion (31) of the spiral-shaped groove (30). During operation of the steam generator (1), water is supplied at one of the central portion (31) and the end portion (33) of the spiral-shaped groove (30). Under the influence of heat, steam is generated, which exits at another one of the central portion (31) and the end portion (33) of the spiral-shaped groove (30).

Abstract: The invention relates to a steam ironing device (1) comprising a water supply device (4), a steam generator (6) for generating steam, heating means (13) for heating the steam generator, at least one atomizating device (10, 15), a valve (11) provided in a flow path (9) between the steam generator and the atomizing device, and an electric pump (5) for delivering water from said water supply device to said steam generator. To obtain wet steam at the atomizing device the ironing device comprises control means (7) for controlling the power of the heating means (13) of the steam generator, for controlling the flow rate of the pump, and for controlling the opening and closing of said valve, said valve being open if the ratio between the flow rate (g/min) of the pump and the power (W) of the heating means is in a range of 1:20 to 1:38.