JPS5843646B2 - liquid fuel combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device that improves combustibility and promotes reduction of combustion noise by adding innovations to a secondary air supply means button and a flame forming means. It is.

For example, in a so-called conventional rotary type liquid fuel combustion device that is equipped with a mechanism that atomizes liquid fuel using rotational centrifugal force, vaporized fuel is created in a vaporization cylinder and mixed with primary air. Spray this from the combustion disk and 2
Then, it was made to burn while being diffused with air.

By the way, the combustion flame converges in the center due to its nature, and therefore, in No. 11, the secondary air did not diffuse sufficiently and good combustion characteristics could not be obtained.

Therefore, in this 1, the diffusivity was improved by feeding secondary air perpendicularly to the combustion flame or swirling the secondary air, but these methods did not cause turbulence in the combustion flame. There was a drawback that noise was generated, and secondary air did not diffuse sufficiently to the center of the flame.

The present invention eliminates these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a first cylindrical body 3 forming an intake port 2;
A burner case consisting of a second cylinder 4 and a third cylinder 6 in which a combustion cylinder 5 is connected, 7 is a motor installed in the first cylinder 3, and its shaft 8 is connected to the tip of the burner case 1. 1 reaches into the internally installed vaporizer cylinder 9.

A turbo fan 11 located between fixed blades 10 is fixed in multiple stages in the middle of the shaft 8.

As shown in FIG. 2, the vaporizing cylinder 9 is open at both ends and is made of a material with good thermal conductivity such as aluminum, and has a heater 12 embedded therein for preheating.

Its front end is supported by the opening edge of the third cylindrical body 6, and its rear end is supported by a partition plate 13 located on the blowing side of the turbo fan 11.

14 is a secondary air pressure equalization chamber set outside the carburetor 9;
5 is a thermostat that detects the temperature of the vaporizer cylinder 9; 16 is an air chamber formed between the partition plate 13 and the fixed blade 10; a part of the air sent into this chamber is absorbed by the partition plate 13; Flows as primary air into the vaporizer cylinder 9 through the central hole 17,
The other part flows into the secondary air pressure equalization chamber 14 as secondary air through the holes 18 on the outer periphery of the partition plate 13 .

Reference numeral 19 indicates a liquid fuel atomizing mechanism facing into the vaporization cylinder 9 and attached to the shaft 8 of the motor γ, which includes a tapered cone 20 with a thicker tip, a swinging plate 21, and this swinging plate 2.
1 and a stirring blade 22 located on the outer periphery of the stirring blade 1.

23 is a fuel pipe opened on the cone 20.

Now, 24 is a burner part attached to the front of the vaporization cylinder 9, and as shown in Figs. A holding plate 28 having a plurality of openings 27 each having a raised edge, a secondary air supply body 29 located on the rear surface of the combustion plate 26 between which a rectifying plate 29' is provided, body 2
9 and a circular mixing promotion plate 30 located on the rear side.

The burner section 24 is fixed at a position a little deeper from the opening at the tip of the vaporizer tube 9.

The residual current plate 29' has a plurality of large diameter holes 31 in the center.
A plurality of small-diameter holes 32 are formed in the outer periphery.

Further, the secondary air supply body 29 connects the outer ring portion 33 and the boss portion 35 forming the secondary air outlet 34 to a plurality of arms 36.
In addition, these arms 36
Inside, one end is a secondary air outlet 34 and the other end is an outer ring part 3.
Secondary air passages 38 are formed which communicate with the openings 37 of No. 3, respectively.

The opening 37 communicates with the secondary air pressure equalization chamber 14 via a vent hole 39 formed in the peripheral wall of the vaporization cylinder 9.

The boss portion 35 of the secondary air supply body 29 is connected to the rectifying plate 19.
, combustion disk 26. t, and passes through the center of the presser plate 28.

40 is a pressure switch that turns on and off depending on the pressure difference between the suction side and the blowing side of the turbo fan 11, 41 is a spark plug, and 42 is a flame rond that detects the presence or absence of flame.

With the above configuration, the heater 12 is now energized to heat the vaporizing cylinder 9, and then the motor 7 is driven.

Here, the turbo fan 11 rotates and starts blowing air, and the liquid fuel atomization mechanism 19 also starts operating.

Then, the pressure switch 40 is turned on by the start of the air blowing.
However, in order for the fuel delivery system to operate, liquid fuel is sent onto the cone 20 via the fuel pipe 23.

The fuel on the cone 20 moves in the direction of the larger diameter along the taper, reaches the swing-off plate 20, and is scattered outward by the centrifugal force.

The above-mentioned fuel is scattered in the form of a thin film, but is then finely divided by the stirring blades 22 to become fine particles and sprayed onto the inner surface of the vaporization cylinder 9.

On the other hand, since the vaporization tube 9 is heated by the heater 12 as described above, the sprayed fuel is instantaneously vaporized and mixed with the primary air that has flowed into the vaporization tube 9 through the hole 17 of the partition plate 13. Ru.

This air-fuel mixture is once throttled by the mixing promotion plate 30 to increase the mixing degree, and then passes through the small holes 31 and 32 of the straightening plate 29', and is ejected from the combustion disk 26 toward the opening 27 of the holding plate 28. Ru.

Further, a part of the air in the air chamber 16 flows through the hole 18 → the secondary air pressure equalization chamber 14 → the ventilation hole 39 → the secondary air passage 38, and is blown out from the outlet 34 as secondary air.

Therefore, the air-fuel mixture obtains secondary air from the center and burns to form the flame F.

Since the secondary air is supplied from the center in this way, the flame F is prevented from converging, and the secondary air is sufficiently diffused to provide good combustibility.

Furthermore, since laminar combustion is the main component, the combustion noise is also extremely low.

In fact, once the combustion starts, the heat recovery section 9a at the tip of the vaporizer tube 9 is heated by the flame F, so there is no need to energize the heater 12 afterwards.

By the way, the flame F is caused by the presser plate 2 in front of the combustion plate 26.
It is divided into a plurality of parts by 8 openings 27.

Therefore, this divided flame further improves the diffusivity with the secondary air.

Due to the turbulent flow at the edge of the opening 270 of the housing, the flame stability of a portion of the divided flame is improved, and as a result, stable combustion without rifting or the like can be achieved as a whole.

As described above, according to the present invention, the secondary air is supplied from the center of the flame in parallel to the direction of flame formation, and since the flame is split, the secondary air has good diffusivity, thereby improving flame convergence. It is possible to achieve quiet and good combustion.

! Since the rim of each opening is raised up, this raised part creates turbulence in the air-fuel mixture, improves the flame stability of each divided flame, and ensures stable combustion without causing lifting etc. as a whole. can be made to

Therefore, the flame-holding effect of this flame can stabilize the overall combustion, thereby expanding the range of stable combustion.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, Fig. 2 is a perspective view of a vaporizing cylinder, Fig. 3 is an exploded perspective view of the burner section, Fig. 4 is a rear view of the same, and Fig. 5 The figure is the same front view, No. 6
The figure is a sectional view taken along the line AA' in FIG. 9... Carburizer tube, 19... Liquid fuel atomization mechanism, 26... Combustion plate, 27... Opening, 28... Holder Board.

Claims (1)

[Claims] 1. A combustion plate is provided in the vaporization cylinder that has a liquid fuel atomization mechanism inside, and a secondary air outlet is located in the center of this combustion plate, and a split flame port is further set in the front of the combustion plate. A liquid fuel combustion device in which a holding plate with a plurality of openings is provided, and the edge of each opening facing the holding plate is raised.