Nozzle for spraying sublimable solid particles entrained in gas for cleaning surface
US7762869B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2008 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Oct 29, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24C1/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A nozzle for spraying sublimable solid particles and preventing frost from forming at surfaces of the nozzle. The nozzle includes: a cleaning agent block for phase-changing a cleaning agent into a snow containing sublimable solid particles; a nozzle block for growing the cleaning agent snow through adiabatic expansion and spraying the grown cleaning agent snow onto a surface of an object; a carrier gas block for supplying a carrier gas to the nozzle block to mix with the cleaning agent snow; and a heater for heating at least a portion of the carrier gas supplied from the carrier gas supply source. Fine dry ice particles and liquid CO2, passing through a solenoid valve from a CO2 reservoir tank and a pressure drop of a flow rate regulation valve, are introduced into the spray nozzle and then mixed with the carrier gas, such as N2 or purified air, and discharged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.