Patent ID: 7762869

Claim:
A nozzle for spraying sublimable solid particles entrained in gas for cleaning a surface, the nozzle comprising: a cleaning agent block having an inlet port in fluid communication with a cleaning agent supply source, and an outlet port including a plurality of orifices, disposed in parallel, for phase changing a cleaning agent into a snow containing sublimable solid particles; a nozzle block having a plurality of inlet ports for introducing the cleaning agent snow, including the orifices of the cleaning agent block, a plurality of venturies for growing the cleaning agent snow introduced into the respective inlet ports through adiabatic expansion, and a plurality of outlet ports in fluid communication with the respective venturies for spraying the cleaning agent snow grown through the venturies onto a surface of an object; a carrier gas block having an inlet port in fluid communication with a carrier gas supply source, and an outlet port in fluid communication with the plurality of inlet ports of the nozzle block for mixing a carrier gas with the cleaning agent snow; and a heater for heating the carrier gas supplied from the carrier gas supply source.