A nozzle and method of providing CO 2 for cleaning includes providing a CO 2 flow; phase transferring the CO 2 flow into gaseous CO 2 and CO 2 pellets; interrupting the CO 2 flow with a screen member; retaining the CO 2 pellets of a select larger size upstream of the screen member; permitting the CO 2 pellets of a select smaller size to pass through the screen member for cleaning.
1. A nozzle for providing CO 2 for cleaning, comprising:
a reservoir for receiving liquid CO 2 ;
a barrel having a passageway therethrough extending to an outlet of the barrel;
an orifice interconnecting the reservoir and the passageway, and through which the liquid CO 2 passes to phase transfer into gaseous CO 2 and CO 2 pellets in the passageway;
a screen member constructed and arranged for interrupting flow of the CO 2 pellets greater than a select size from being emitted from the passageway of the barrel;
an electrical insulator mounted to the barrel; and
a voltage source, connected to the screen member, for actuation to mitigate electro-static charges of the CO 2 pellets.
2. The nozzle of claim 1 , wherein the screen member is disposed in the passageway.
3. The nozzle of claim 1 , wherein the screen member is disposed at the outlet of the barrel.
4. The nozzle of claim 1 , wherein the screen member comprises a plurality of elongated slots extending therethrough.
5. The nozzle of claim 4 , wherein the plurality of elongated slots are of different lengths.
6. The nozzle of claim 1 , wherein the screen member comprises a plurality of channels extending therethrough.
7. The nozzle of claim 6 , wherein at least one of the plurality of channels has a size different than others of the plurality of channels.
8. The nozzle of claim 1 , wherein the screen member comprises a collar portion mountable to the barrel at the outlet.
9. The nozzle of claim 8 , wherein the collar portion is removably mountable to the barrel at the outlet.
10. The nozzle of claim 1 , wherein the barrel further comprises a plurality of apertures extending therethrough, each one of the plurality of apertures having a first end open at the passageway and angled toward the orifice, and a second end opposite the first end and open to an exterior of the barrel, the plurality of apertures venting at least a portion of the gaseous CO 2 from the passageway.
11. The nozzle of claim 10 , wherein the screen member is mounted to the outlet of the barrel downstream from the plurality of apertures.
12. The nozzle of claim 10 , wherein the orifice comprises an outwardly concave surface area proximate the passageway.
13. The nozzle of claim 1 , wherein the reservoir comprises a diameter which is reduced in size closer to the orifice.
14. A nozzle for providing CO 2 for cleaning, comprising:
a housing having an outlet;
a reservoir for liquid CO 2 within the housing, the reservoir in communication with the outlet and having a reduced diameter approaching the outlet for facilitating the phase transfer of the liquid CO 2 into gaseous CO 2 and CO 2 pellets upon being emitted from the outlet; and
an electrical insulator mounted to the barrel, and a voltage source connected to the barrel for actuation to mitigate electro-static charges of the CO 2 pellets.
15. The nozzle of claim 14 , further comprising a screen member disposed at the outlet for interrupting flow of CO 2 pellets greater than a select size from being emitted from the screen member.
16. The nozzle of claim 15 , wherein the screen member is removably mountable to the housing at the outlet.
17. The nozzle of claim 15 , wherein the screen member comprises a plurality of holes selected from slots and channels.
18. The nozzle of claim 14 , wherein an exterior of the housing proximate the outlet comprises a truncated surface area.
19. The nozzle of claim 14 , wherein the outlet comprises a concave surface area facing the reservoir.
20. The nozzle of claim 14 , wherein the outlet comprises a concave surface area facing an exterior of the housing.
21. The nozzle of claim 20 , further comprising:
a barrel extending from the housing and having a passageway therethrough extending to a barrel outlet, the passageway in communication with the housing outlet and through which the liquid CO 2 passes to phase transfer into gaseous CO 2 and CO 2 pellets in the passageway;
a plurality of apertures extending through the barrel, each one of the plurality of apertures having a first end open at the passageway and angled toward the reservoir, and a second end opposite the first end and open to an exterior of the barrel, the plurality of apertures venting at least a portion of the gaseous CO 2 from the passageway.
22. A method of providing CO 2 for cleaning, comprising:
providing a CO 2 flow;
phase transferring the CO 2 flow into gaseous CO 2 and CO 2 pellets;
interrupting the CO 2 flow with a screen member;
retaining the CO 2 pellets of a select larger size upstream of the screen member;
permitting the CO 2 pellets of a select smaller size to pass through the screen member for cleaning.
23. The method of claim 22 , wherein the interrupting with the screen member further comprises positioning the screen member with respect to the CO 2 flow for adjusting a plume of the CO 2 pellets emitted downstream from the screen member.