Patent ID: 7008306

Claim:
A nozzle for injecting sublimable solid particles entrained in gas for cleaning a surface, comprising: a base block having a space in which carrier gas is supplied through a gas supplying pipe; a sub-block having a space in which cleaning medium decompressed by a regulator is supplied through a cleaning medium supplying pipe; a first venturi block having a venturi path for adiabatically expanding the carrier gas supplied from the space of the base block, and a cleaning medium injection path is adjacent to a throttle portion so as to connect the throttle portion of the venturi path with the space of the sub-block to mix the cleaning medium of the sub-block and the carrier gas passed through the venturi path; a second venturi block having a venturi path for adiabatically expanding the mixed gas of the carrier gas and the cleaning medium, wherein the venturi path of the first venturi block has an acute angle with respect to the cleaning medium injection path, and wherein the first and second venturi blocks respectively have a plurality of venturi paths disposed in parallel, and the sub-block has the same number of cleaning injection paths as the number of venturi paths.