JPS6234092Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vaporizing burner for a liquid fuel combustion device, and particularly relates to an improvement of the burner portion.

An embodiment of this invention will be described below with reference to FIGS. 1 and 2. That is, in the figure, 1 is the through hole 2.
3 is a combustion box, one end of which is connected to a combustion tube 4, and the other end of which is connected to the blower casing 1. Reference numeral 5 denotes an electric motor attached to the blower casing 1 via a support member 6, and a through hole 2 of the blower casing 1.
The rotating shaft 7 passes through the inside of the blower casing 1. 8 is a rotor blade provided on the rotating shaft 7,
It is housed within the blower casing 1. Reference numeral 9 indicates a stationary blade provided on the inner wall of the blower casing 1 in correspondence with the rotor blade 8, and reference numeral 10 indicates a support member 11 within the combustion box 3.
Liquid fuel vaporization surface 1 with a vaporizer installed at etc.
It has a shape in which a large diameter cylindrical body serving as 0A and a small diameter cylindrical body serving as the flame outlet 10B are connected.
Further, an electric heater 12 is embedded in this vaporizer 10. Reference numeral 13 denotes a cover that covers the large-diameter side opening of the vaporizer 10, and a through hole 14 is formed in the center. Reference numeral 15 denotes a rotary atomizer provided at the tip of the rotary shaft 7, and is formed in the shape of a truncated cone with a smaller diameter on the rotor blade 8 side. Further, almost the entire rotary atomizer 15 is located inside the vaporizer 10 through the through hole 14 of the cover 13. 16 is an atomizing plate provided on the large diameter side of the rotary atomizer 15, 17 is on the surface of the rotary atomizer 15,
The liquid fuel supply pipe 18 is a burner section that supplies liquid fuel, and as shown in detail in FIG. It is formed by a plate 20, a perforated plate 22, a wire mesh 23, and a presser plate 24, which are sequentially provided on the side of the atomizing plate 16 from the flame outlet 19 of the flame outlet plate 20. Note that the presser plate 24 has air-fuel mixture penetration holes 2 having a diameter smaller than the flame port 19 of the flame port plate 20.
5 is formed. And this burner part 18
is installed at a stepped portion inside the carburetor 10 via a gasket 26. Further, 27 is a member that covers the periphery of the burner part 18, and a through hole 25 of the presser plate 24 is provided in the center.
A rich mixture through hole 28 with a smaller diameter is surrounded by a thin air mixture through hole 2 with an extremely small diameter.
9 is formed. Reference numeral 30 denotes a rich mixture through hole 3 having the same diameter as the through hole 28 of the member 27.
This through hole 31 is a cup-shaped pressure regulating plate having 1
are provided in the member 27 so as to correspond to the through holes 28 of the member 27.

The device according to this invention is constructed as described above, and now, by energizing the electric motor 5 and rotating the rotating shaft 7, the moving blades 8, the rotary atomizer 15, and the atomizing plate 16 are rotated. By supplying liquid fuel from the fuel supply pipe 17 to the rotating rotary atomizer 15, the fuel is scattered from the rotary atomizer 15 by centrifugal force and atomized, and the vaporization surface 10A is heated in advance by the electric heater 12. It vaporizes on contact. This vaporized fuel is mixed with combustion air supplied by the rotation of the rotor blades 8 in the atomizing plate 16, and is mixed in a concentrated manner as shown by arrow A through the through holes 31 of the pressure regulating plate 30 and the through holes 28 of the member 27. Air is supplied to the center of the burner section 18, and a thin air-fuel mixture is supplied to the burner section 18 as shown by arrow B through the space between the pressure regulating plate 30 and the carburetor 10 and the through hole 29 from the outer periphery of the member 27. is supplied from the outer periphery of the When the burner section 18 is ignited by an ignition device (not shown), a flame F is formed at the flame outlet 10B of the carburetor 10. By the way, after a flame is generated in this type of device, the electricity to the electric heater 12 is generally stopped in order to save power, etc., and the heat of the flame is recovered by the vaporizer 10 to heat the vaporization surface 10A. However, in this invention, the flame port 19 of the flame port plate 20
Since the diameter of the flame F is larger than the inner diameter of the flame outlet 10B of the vaporizer 10, the flame F tries to become larger than the inner diameter of the flame outlet 10B of the vaporizer 10,
As shown by the solid line in the figure, the area where the flame F hits the vaporizer 10 is increased compared to the conventional structure (indicated by the broken line), and the amount of heat recovered to the vaporizer 10 is increased. As a result, the temperature of the vaporizing surface 10A can be maintained at a temperature sufficient to vaporize the liquid fuel even when the combustion state is out of the rated range, for example when there is less fuel and the amount of air increases. can.

As described above, this invention has a vaporization surface made of a large-diameter cylindrical body that is heated by a buried electric heater and vaporizes atomized liquid fuel, and a diameter-reduced step portion on this vaporization surface. A vaporizer having a flame outlet formed of a connected small-diameter cylindrical body on the inner surface, and a burner section disposed on the side of the reduced diameter step of the vaporization surface, and a flame port located on the most downstream side of the burner section. The flame diameter of the plate is formed to be larger than the inner diameter at the end of the flame outlet on the vaporizing surface side, and a mixture through hole having a smaller diameter than the flame outlet of the flame outlet plate is formed in the holding plate located upstream of the burner part. A rich air-fuel mixture through-hole with a smaller diameter than the air-fuel mixture through-hole of the presser plate is formed in the inner circumference of the annular cover member provided to cover the periphery of the burner part. A cup-shaped pressure regulating plate is provided at the bottom thereof with a hole for passing through a rich air-fuel mixture, and the through hole corresponds to the through hole of the cover member. Since the thin air-fuel mixture penetration hole is located on the outer periphery and has a small diameter, the recovered heat transferred to the vaporizer by the flame discharged from the flame outlet of the inner light outlet plate, which is larger than the flame outlet, is increased. In particular, the air-fuel mixture that is introduced through the small-diameter thin air-fuel mixture through-hole provided on the outside of the annular covering member on the outer periphery of the pressure regulating plate and through the periphery of the through-hole in the burner section press plate is treated as a thin air-fuel mixture with a high flame propagation speed. This air-fuel mixture is compressed in the outer circumferential direction by the rich air-fuel mixture introduced from the through hole in the inner circumference of the annular cover member, and the flame tends to expand from the outlet of the outlet plate, which is larger than the inner diameter of the flame outlet. It will be discharged to the outlet,
The flame is formed in close contact with the flame outlet from the inner diameter side of the carburetor stage, which has the advantage of achieving stable combustion and significantly increased heat recovery to the carburetor side.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention.
FIG. 2 is a sectional view of the main part of FIG. 1. In addition, the same reference numerals in the figures indicate the same parts, 10 is a carburetor, 1 is
0A is a vaporizing surface, 10B is a flame outlet, 12 is an electric heater, 18 is a burner section, 19 is a flame port, and 20 is a flame port plate.

Claims (1)

[Scope of utility model registration request] A vaporization surface 10A consisting of a large-diameter cylindrical body that is heated by a buried electric heater 12 and vaporizes atomized liquid fuel, and a small-diameter cylindrical body connected to this vaporization surface with a diameter-reducing step. Naru Flame Exit 10
B, and a burner section 18 disposed on the side of the reduced diameter step of the vaporizing surface 10A.
The diameter of the burner port 19 of the burner port plate 20 located on the most downstream side of this burner section is formed to be larger than the inner diameter at the end of the burner port outlet 10B on the vaporizing surface side, and A gas mixture through hole 25 having a smaller diameter than the flame port 19 of the burner port plate 20 is formed in the presser plate 24 located at the burner portion 18 .
A rich mixture through hole 28 having a smaller diameter than the air mixture through hole 25 of the presser plate 24 is formed on the inner circumference of the annular cover member 27 provided to cover the periphery of the cover member 27, and has a diameter equivalent to that of this hole. A cup-shaped pressure regulating plate 30 having a rich air-fuel mixture penetration hole 31 at the bottom thereof is provided so that the penetration hole 31 corresponds to the through-hole 28 of the cover member 27, and furthermore, a cup-shaped pressure regulating plate 30 is provided at the bottom thereof, and a hole 31 is provided on the outer periphery of the cover member 27. A vaporizing burner for a liquid fuel combustion device, characterized in that a thin air-fuel mixture penetration hole 29 with a small diameter is formed at the outer periphery of the pressure regulating plate 30.