Abstract: A radiating device consisting of a blower (140) and a radiation source (38) which emits ultra violet radiation (UV-radiation) being connected with a voltage-dropping impedance and with an AC-power source, whereby the radiation source cooperates with an air flow which is generated by the blower, in particular a hair dryer (141). The voltage dropping impedance is mainly capacitive and the radiation source (33) is arranged in the air flow of the blower, whereby the air flow cools the radiation source in such a manner that that the instantaneous value of its restriking voltage.ltoreq.to the instantaneous value of the line voltage.

Abstract: A method is described by means of which a UV radiation beam is modified by passing a stream of a gas around the radiation source. The device for carrying out this method includes a gas duct connectable at its inlet to a source of gas such as a hot-air blower. A UV-radiation source with a reflector is located at the outlet of the duct so as to permit passage of a stream of gas in the direction of the emitted radiation beam and a part of the gas stream is deflected around the source. A baffle plate permeable to radiation is located in front of the radiation source to create an increased dynamic gas pressure.

Abstract: An ultraviolet radiator enclosed in an individual housing is formed as an attachment to a motor-driven hair drier. The ultraviolet radiator is mountable on the tubular extension of the hair drier.