Fuel nozzle for use in a burner

Abstract

A fuel nozzle for use in a burner comprises a main body having an inlet end and an outlet end and defining a longitudinal axis. A fuel passageway has a fuel receiving inlet, and a fuel emitting outlet for delivering fuel to a mixing chamber of the burner. A first air flow channel having an inlet, and an outlet disposed adjacent the fuel emitting outlet for delivering air to the mixing chamber. The portion of the first air flow channel adjacent the outlet is oriented obliquely to the longitudinal axis. A second air flow channel has an inlet, and an outlet disposed adjacent the fuel emitting outlet for delivering air to the mixing chamber. The first air flow channel and the second air flow channel generally surround the fuel passageway, and are disposed on the exterior of the main body.

1 . A fuel nozzle for use in a burner, said fuel nozzle comprising:
 a main body having an inlet end and an outlet end and defining a longitudinal axis extending between said inlet end and said outlet end;   a fuel passageway having a fuel receiving inlet, and a fuel emitting outlet for delivering fuel to a mixing chamber of said burner; and,   a first air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber;   wherein the portion of said first air flow channel adjacent said outlet is oriented obliquely to said longitudinal axis.   
     
     
         2 . The fuel nozzle of  claim 1 , wherein said main body comprises an elongate main body. 
     
     
         3 . The fuel nozzle of  claim 2 , wherein said elongate main body is circular in cross-section. 
     
     
         4 . The fuel nozzle of  claim 1 , wherein said fuel passageway is a central fuel passageway. 
     
     
         5 . The fuel nozzle of  claim 4 , wherein said fuel nozzle is substantially straight. 
     
     
         6 . The fuel nozzle of  claim 5 , wherein said central passageway is substantially straight. 
     
     
         7 . The burner of  claim 1 , wherein substantially all of said first air flow channel is oriented obliquely to said longitudinal axis. 
     
     
         8 . The burner of  claim 7 , wherein said first air flow channel is helically shaped. 
     
     
         9 . The burner of  claim 1 , wherein said inlet of said first air flow channel has a cross-sectional area that is larger than the cross-sectional area of said outlet of said first air flow channel. 
     
     
         10 . The burner of  claim 6 , wherein the ratio of the cross-sectional area of said inlet of said first air flow channel to the cross-sectional area of said outlet of said first air flow channel is about 1.6 to 1. 
     
     
         11 . The burner of  claim 10 , wherein the cross-sectional area of said first air flow channel decreases from said inlet to said outlet. 
     
     
         12 . The burner of  claim 11 , wherein the width of said first air flow channel decreases from said inlet to said outlet. 
     
     
         13 . The burner of  claim 12 , wherein the depth of said first air flow channel decreases from said inlet to said outlet. 
     
     
         14 . The fuel nozzle of  claim 13 , further comprising a second air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         15 . The fuel nozzle of  claim 14 , further comprising a third air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, a fourth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, and a fifth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         16 . The fuel nozzle of  claim 15 , wherein said plurality of helically shaped air flow channels is substantially parallel to adjacent helically shaped air flow channels. 
     
     
         17 . The fuel nozzle of  claim 16 , wherein said second air flow channel, said third air flow channel, said fourth air flow channel, and said fifth air flow channel are each helically shaped. 
     
     
         18 . The fuel nozzle of  claim 2 , wherein said elongate main body comprises a narrow back portion and a wider front portion. 
     
     
         19 . The fuel nozzle of  claim 18 , wherein said elongate main body further comprises a sloped portion interconnecting said narrow back portion and said wider front portion. 
     
     
         20 . The burner of  claim 19 , wherein said sloped portion of said fuel nozzle engages in sealing contact with a co-operating receiving surface on said burner. 
     
     
         21 . The burner of  claim 18 , wherein said fuel nozzle comprises a rear portion that is threaded to engage a co-operating nut to thereby retain said fuel nozzle in place on said burner. 
     
     
         22 . The fuel nozzle of  claim 1 , further comprising a fuel nozzle tip mounted in removable and replaceable relation in the front end of said main body. 
     
     
         23 . A fuel nozzle for use in a burner, said fuel nozzle comprising:
 a main body having an inlet end and an outlet end and defining a longitudinal axis extending between said inlet end and said outlet end;   a fuel passageway having a fuel receiving inlet, and a fuel emitting outlet for delivering fuel to a mixing chamber of said burner; and,   a first air flow channel disposed on the exterior of said elongate main body, and having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber.   
     
     
         24 . The fuel nozzle of  claim 23 , wherein said main body comprises an elongate main body. 
     
     
         25 . The fuel nozzle of  claim 24 , wherein said elongate main body is circular in cross-section. 
     
     
         26 . The fuel nozzle of  claim 23 , wherein said fuel passageway is a central fuel passageway. 
     
     
         27 . The fuel nozzle of  claim 26 , wherein said fuel nozzle is substantially straight. 
     
     
         28 . The fuel nozzle of  claim 27 , wherein said central passageway is substantially straight. 
     
     
         29 . The burner of  claim 23 , wherein substantially all of said first air flow channel is oriented obliquely to said longitudinal axis. 
     
     
         30 . The burner of  claim 29 , wherein said first air flow channel is helically shaped. 
     
     
         31 . The burner of  claim 23 , wherein said inlet of said first air flow channel has a cross-sectional area that is larger than the cross-sectional area of said outlet of said first air flow channel. 
     
     
         32 . The burner of  claim 28 , wherein the ratio of the cross-sectional area of said inlet of said first air flow channel to the cross-sectional area of said outlet of said first air flow channel is about 1.6 to 1. 
     
     
         33 . The burner of  claim 32 , wherein the cross-sectional area of said first air flow channel decreases from said inlet to said outlet. 
     
     
         34 . The burner of  claim 33 , wherein the width of said first air flow channel decreases from said inlet to said outlet. 
     
     
         35 . The burner of  claim 34 , wherein the depth of said first air flow channel decreases from said inlet to said outlet. 
     
     
         36 . The fuel nozzle of  claim 35 , further comprising a second air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         37 . The fuel nozzle of  claim 36 , further comprising a third air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, a fourth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, and a fifth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         38 . The fuel nozzle of  claim 37 , wherein said plurality of helically shaped air flow channels is substantially parallel to adjacent helically shaped air flow channels. 
     
     
         39 . The fuel nozzle of  claim 38 , wherein said second air flow channel, said third air flow channel, said fourth air flow channel, and said fifth air flow channel are each helically shaped. 
     
     
         40 . The fuel nozzle of  claim 24 , wherein said elongate main body comprises a narrow back portion and a wider front portion. 
     
     
         41 . The fuel nozzle of  claim 40 , wherein said elongate main body further comprises a sloped portion interconnecting said narrow back portion and said wider front portion. 
     
     
         42 . The burner of  claim 41 , wherein said sloped portion of said fuel nozzle engages in sealing contact with a co-operating receiving surface on said burner. 
     
     
         43 . The burner of  claim 40 , wherein said fuel nozzle comprises a rear portion that is threaded to engage a co-operating nut to thereby retain said fuel nozzle in place on said burner. 
     
     
         44 . The fuel nozzle of  claim 23 , further comprising a fuel nozzle tip mounted in removable and replaceable relation in the front end of said main body. 
     
     
         45 . A fuel nozzle for use in a burner, said fuel nozzle comprising:
 a main body having an inlet end and an outlet end and defining a longitudinal axis extending between said inlet end and said outlet end;   a fuel passageway having a fuel receiving inlet, and a fuel emitting outlet for delivering fuel to a mixing chamber of said burner;   a first air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber; and,   a second air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber;   wherein said first air flow channel and said second air flow channel generally surround said fuel passageway.   
     
     
         46 . The fuel nozzle of  claim 45 , wherein said main body comprises an elongate main body. 
     
     
         47 . The fuel nozzle of  claim 46 , wherein said elongate main body is circular in cross-section. 
     
     
         48 . The fuel nozzle of  claim 45 , wherein said fuel passageway is a central fuel passageway. 
     
     
         49 . The fuel nozzle of  claim 48 , wherein said fuel nozzle is substantially straight. 
     
     
         50 . The fuel nozzle of  claim 49 , wherein said central passageway is substantially straight. 
     
     
         51 . The burner of  claim 45 , wherein substantially all of said first air flow channel is oriented obliquely to said longitudinal axis. 
     
     
         52 . The burner of  claim 51 , wherein said first air flow channel is helically shaped. 
     
     
         53 . The burner of  claim 45 , wherein said inlet of said first air flow channel has a cross-sectional area that is larger than the cross-sectional area of said outlet of said first air flow channel. 
     
     
         54 . The burner of  claim 50 , wherein the ratio of the cross-sectional area of said inlet of said first air flow channel to the cross-sectional area of said outlet of said first air flow channel is about 1.6 to 1. 
     
     
         55 . The burner of  claim 54 , wherein the cross-sectional area of said first air flow channel decreases from said inlet to said outlet. 
     
     
         56 . The burner of  claim 55 , wherein the width of said first air flow channel decreases from said inlet to said outlet. 
     
     
         57 . The burner of  claim 56 , wherein the depth of said first air flow channel decreases from said inlet to said outlet. 
     
     
         58 . The fuel nozzle of  claim 57 , further comprising a second air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         59 . The fuel nozzle of  claim 58 , further comprising a third air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, a fourth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber, and a fifth air flow channel having an inlet, and an outlet disposed adjacent said fuel emitting outlet for delivering air to said mixing chamber. 
     
     
         60 . The fuel nozzle of  claim 59 , wherein said plurality of helically shaped air flow channels is substantially parallel to adjacent helically shaped air flow channels. 
     
     
         61 . The fuel nozzle of  claim 60 , wherein said second air flow channel, said third air flow channel, said fourth air flow channel, and said fifth air flow channel are each helically shaped. 
     
     
         62 . The fuel nozzle of  claim 46 , wherein said elongate main body comprises a narrow back portion and a wider front portion. 
     
     
         63 . The fuel nozzle of  claim 62 , wherein said elongate main body further comprises a sloped portion interconnecting said narrow back portion and said wider front portion. 
     
     
         64 . The burner of  claim 19 , wherein said sloped portion of said fuel nozzle engages in sealing contact with a co-operating receiving surface on said burner. 
     
     
         65 . The burner of  claim 18 , wherein said fuel nozzle comprises a rear portion that is threaded to engage a co-operating nut to thereby retain said fuel nozzle in place on said burner. 
     
     
         66 . The fuel nozzle of  claim 1 , further comprising a fuel nozzle tip mounted in removable and replaceable relation in the front end of said main body.