DEVICE FOR SPRAYING A LIQUID

• US 20150165251A1
• Filed: 06/29/2013
• Published: 06/18/2015
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: ArianeGroup SAS
• Original Assignee: Herakles SA (Safran SA)
• Inventors: Marlin, Frdric
• Granted Patent: US 9,750,965 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A62C 13/003 Extinguishers with spraying and projection of extinguishing agents by pressurised gas
• CPC Class Codes: A62C 13/22 with incendiary substances producing pressure gas
• CPC Class Codes: A62C 35/023 the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas for foam generation A62C5/02
• CPC Class Codes: A62C 37/44 only the sensor being in the danger zone
• CPC Class Codes: A62C 5/006 Extinguishants produced by combustion
• CPC Class Codes: B05B 7/0006 Spraying by means of explosions
• CPC Class Codes: B05B 7/0475 with means for deflecting the peripheral gas flow towards the central liquid flow B05B7/0458 takes precedence
• CPC Class Codes: B05B 7/068 the annular gas outlet being supplied by a gas conduit having an axially concave curved internal surface just upstream said outlet

Abstract

A spray device (100) for spraying a liquid (L), the device comprises a tank (10) containing the liquid (L) for spraying, at least one liquid ejector member (20) in communication with said tank (10), and a pyrotechnic gas generator (30) for pressurizing the liquid inside said tank and propelling it under pressure out from said tank. According to the invention, in at least one mode of operation, the ejector member (20) is in communication with the gas generator (30) in such a manner as to enable it to be fed with the gas generated by said generator (30).

Claims

1. A spray device for spraying a liquid, the device comprising:

a tank containing the liquid for spraying;

at least one liquid ejector member in communication with said tank; and

a pyrotechnic gas generator for pressurizing the liquid inside said tank and propelling it under pressure out from said tank;

wherein in at least one mode of operation, the ejector member is in communication with the gas generator in such a manner as to enable it to be fed with the gas generated by said generator.

2. A spray device for spraying a liquid, according to claim 1, wherein the gas generator comprises at least one combustion chamber housing a pyrotechnic charge, the ejector member is a nozzle, and, in at least one mode of operation, the nozzle is in direct communication with said combustion chamber in such a manner as to be capable of being fed with the gas generated by said pyrotechnic charge.

3. A spray device according to claim 1, wherein the ejector member is a two-fluid nozzle.

4. A spray device according to claim 3, wherein the two-fluid nozzle is an internal mixer nozzle.

5. A spray device according to claim 3, wherein the two-fluid nozzle is an external mixer nozzle.

6. A spray device according to claim 1, wherein the gas generator is located at least in part inside said tank.

7. A spray device according to claim 1, wherein the gas generator is configured for the gas that is released to act directly on the liquid.

8. A spray device according to claim 1, wherein the gas generator is configured for the gas to act indirectly on the liquid via a movable separator member.

9. A spray device according to claim 8, wherein the movable separator member is a deformable membrane, in particular a flexible membrane.

10. A spray device according to claim 8, wherein the movable separator member is a slidable piston.

11. A spray device according to claim 1, wherein the gas generator comprises a combustion chamber housing at least one pyrotechnic charge, said combustion chamber being arranged so that a portion of the gas generated in said chamber acts on the liquid to pressurize it and to propel it out from the tank, and so that, in at least mode of operation, another portion of the gas generated in said chamber feeds the ejector member.

12. A spray device according to claim 1, wherein the gas generator has a first gas generator unit having a first combustion chamber housing at least one first pyrotechnic charge, and a second gas generator unit comprising a second combustion chamber housing at least one second pyrotechnic charge, said first chamber gas generator unit being arranged in such a manner that the gas generated in said first combustion chamber acts on the liquid to pressurize it and to propel it out from the tank, and said second gas generator unit being arranged so that, in at least one mode of operation, the gas generated in said second combustion chamber feeds the liquid ejector member.

13. A spray device according to claim 12, wherein the pyrotechnic gas generator includes an ignitor suitable for causing the first pyrotechnic charge and the second pyrotechnic charge to fire jointly.

14. A spray device according to claim 12, wherein the pyrotechnic gas generator includes a first ignitor adapted to fire the first pyrotechnic charge, and a second ignitor adapted to fire the second pyrotechnic charge independently of the first.

15. A spray device according to claim 14, further including a temperature sensor inside the tank and a control member controlling the actuation of the second ignitor as a function of the temperature value measured inside the tank.

16. A spray device according to claim 1, further including a valve for controlling the flow rate of gas delivered into the ejector member and a temperature sensor situated inside the tank, said valve being controlled as a function of the temperature measured by said sensor.