Nozzle for injecting sublimable solid particles entrained in gas for cleaning a surface

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.