The present invention relates to a blower for the production of a mist or the like (e.g. a smoke, a fog, etc.). The blower comprises a conduit means able to convey liquid carbon dioxide (CO.sub.2) and a support means, said conduit means having an inlet means suitable for introducing liquid CO.sub.2 therewithin and an outlet means able to discharge liquid CO.sub.2 to the atmosphere so as to form a mist or the like, said inlet means being fixed to said support means, characterized in that, said outlet means is rotatably coupled to said inlet means, said outlet means being rotatable about a first axis of rotation.
A device and method for cooling chemical smoke for creating a low lying fog effect comprises first and second chambers arranged in heat exchange relationship, the first chamber comprising an open-ended conduit adapted for maintaining a flow of chemical smoke therethrough, the second chamber adapted for receiving liquid CO.sub.2 under pressure and including vent openings for venting gases from the second chamber into the first chamber for maintaining the second chamber at ambient pressure, the liquid CO.sub.2 transforming to dry ice in situ, and a liquid CO.sub.2 supply system for connecting a source of liquid CO.sub.2 under pressure to the second chamber, whereby the chemical smoke flowing through the first chamber is cooled by the dry ice in the second chamber. Thermal sensor means sense the temperature in the second chamber and control a liquid CO.sub.2 flow control valve in the liquid CO.sub.2 supply system.
