Air induction nozzle

• US 10,039,944 B2
• Filed: 07/11/2013
• Issued: 08/07/2018
• Est. Priority Date: 07/11/2013
• Status: Active Grant

• Current Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Original Assignee: Marioff Corporation Oy (Carrier Global Corporation)
• Inventors: Hurme, Antti Tapio
• Primary Examiner(s): Ganey, Steven J
• Application Number:
  US14/903,832
• Publication Number:
  US 20160144212A1
• Time in Patent Office: 1,853 Days
• Field of Search: 169 46, 169 37, 239 1, 239 8, 2394195, 239422, 239428, 2394285, 239433, 239434, 239DIG 7
• CPC Class Codes: A62C 31/02 Nozzles specially adapted for fire-extinguishing
• CPC Class Codes: A62C 5/008 for producing other mixtures of different gases or vapours, water and chemicals, e.g. water and wetting agents, water and gases
• CPC Class Codes: A62C 99/0072 using sprayed or atomised water
• CPC Class Codes: B05B 1/00 Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means B05B3/00, B05B5/00, B05B7/00 take precedence; nozzles for baths with water or gas jets A61H33/00, e.g. A61H33/6063, A61H33/6021, A61H33/026 or A61H33/027; Nozzles specially adapted for fire-extinguishing A62C31/02; Nozzles for generating high velocity abrasive fluid jets B24C5/04; nozzles for jet-ink printing mechanisms B41J2/135; nozzles for filling containers B65B39/00; nozzles for liquid-dispensing, e.g. in vehicle service stations B67D7/42
• CPC Class Codes: B05B 7/04 with arrangements for mixing liquids or other fluent materials before discharge mixing in general B01F, e.g. B01F25/00; mixing valves F16K11/00
• CPC Class Codes: B05B 7/0458 the gas and liquid flows being perpendicular just upstream the mixing chamber

Abstract

A nozzle includes a nozzle housing defining a first flow path having a first inlet at a first end of the nozzle housing and a first outlet at a second end of the nozzle housing. The nozzle housing also defines a second flow path having a second inlet at an outer surface of the nozzle housing and a second outlet in a side wall of the nozzle housing defining the first flow path, the second outlet defining a Coanda profile and having an annular shape around the first flow path. The nozzle housing defines a third flow path having a third inlet at the outer side surface of the nozzle housing and a third outlet in the side wall defining the first flow path, the third outlet comprising a plurality of holes arranged in an annular pattern around the first flow path.

Claims

1. A nozzle, comprising:

a nozzle housing defining a first flow path having a first inlet at a first end of the nozzle housing and a first outlet at a second end of the nozzle housing, a second flow path having a second inlet at an outer surface of the nozzle housing and a second outlet in a side wall of the nozzle housing defining the first flow path, the second outlet having a Coanda profile and having an annular shape around the first flow path, and a third flow path having a third inlet at the outer side surface of the nozzle housing and a third outlet in the side wall defining the first flow path, the third outlet comprising a plurality of holes arranged circumferentially around the first flow path.

2. The nozzle of claim 1, wherein the first inlet is configured to receive a gas flow to direct the gas flow along the first flow path, the second flow path is configured to direct a pressurized gas flow into the first flow path via the second outlet, and the third flow path is configured to direct a low-pressure liquid into the first flow path via the third outlet.

3. The nozzle of claim 2, wherein the gas and the pressurized gas are air, and the low-pressure liquid is water.

4. The nozzle of claim 2, wherein the second outlet is configured to generate a Coanda effect in the first flow path with the pressurized gas flow from the second flow path to draw the gas into the first inlet.

5. The nozzle of claim 1, wherein the first flow path narrows from the first inlet to the second outlet and widens from the second outlet to the first outlet.

6. The nozzle of claim 1, wherein the second outlet is a continuous annular opening in the side wall of the nozzle housing defining the first flow path.

7. The nozzle of claim 1, wherein the second outlet is located between the first outlet and the third outlet.

8. A liquid-mist fire suppression system, comprising:

a sensor configured to detect a fire;

a nozzle including a main air flow path having a first inlet and a first outlet, a pressurized air flow path having a second outlet into the main air flow path, the second outlet configured to generate a Coanda effect to draw the air into the first inlet of the main air flow path, and a liquid flow path having a third outlet into the main flow path, the third outlet configured to insert a liquid into the main air flow path to generate a liquid mist out from the first outlet of the main air flow path;

a liquid supply configured to provide the liquid to the liquid flow path based on a fire detection signal from the sensor; and

a pressurized air supply configured to supply pressurized air to the pressurized air flow path based on the fire detection signal from the sensor.

9. The liquid-mist fire suppression system of claim 8, wherein the liquid is water.

10. The liquid-mist fire suppression system of claim 8, wherein the liquid supply is configured to supply the liquid to the nozzle at a low pressure.

11. The liquid-mist fire suppression system of claim 8, wherein the first flow path narrows from the first inlet to the second outlet and widens from the second outlet to the first outlet.

12. The liquid-mist fire suppression system of claim 8, wherein the second outlet is a continuous annular opening in a side wall of the first flow path.

13. The liquid-mist fire suppression system of claim 8, wherein the second outlet is located between the first outlet and the third outlet.

14. A method of generating a liquid mist, comprising:

providing air to a first inlet of a nozzle, the nozzle including a main flow path including the first inlet and a first outlet, a second flow path including a second outlet into the main flow path and a third flow path including a third outlet into the main flow path;

providing pressurized air to the second flow path to generate a Coanda effect in the first flow path to draw the air into the first inlet of the first flow path; and

providing a liquid to the third flow path to form a mist of the liquid out from the first outlet of the main flow path;

wherein the third outlet is a plurality of holes arranged annularly around the first flow path to form the mist out from the first outlet.

15. The method of claim 14, wherein the liquid is water, and the mist is a water mist.

16. The method of claim 14, wherein the liquid is provided at a low pressure.

17. A method of extinguishing a flame, comprising:

detecting a flame;

providing air to a first inlet of a nozzle, the nozzle including a main flow path including the first inlet and a first outlet, a second flow path including a second outlet into the main flow path and a third flow path including a third outlet into the main flow path;

providing pressurized air to the second flow path, based on detecting the flame, to generate a Coanda effect in the first flow path to draw the air into the first inlet of the first flow path; and

providing a flame-extinguishing liquid to the third flow path, based on detecting the flame, to form a mist of the flame-extinguishing liquid out from the first outlet of the main flow path onto the flame.

18. The method of claim 17, wherein the pressurized air is provided at a high pressure and the flame-extinguishing liquid is provided at a low pressure.

19. The method of claim 17, wherein the third outlet is a plurality of holes arranged annularly around the first flow path to form the mist out from the first outlet.