JPH0237204A - Liquid fuel burning equipment - Google Patents

Abstract

PURPOSE:To contrive to keep a vaporizing cylinder at the predetermined temperature and, at the same time, to uniformize the air-fuel mixture sending to a flame port part by a structure wherein an atomizing means of fuel is provided in a vaporizing chamber and a supply fan to supply vaporizing air is provided at the bottom of an equipment and further mixing blades are provided in a mixing chamber for mixing the mixture sent from the vaporizing chamber and carrier air. CONSTITUTION:When a vaporizing cylinder 20 is heated up to the predetermined temperature with a heater 19, liquid fuel is discharged by means of a pump 28 through a feed oil pipe 27 onto a rotor 23 so as to be evenly scattered and atomized by means of the rotor 23, which is rotated with a motor 26, and a slinger plate 24 in order to be vaporized on the inner wall of the heated vaporizing cylinder 20 and at the same time mixed with vaporizing air, which is fed to a vaporizing chamber 47 with a supply fan 46, resulting in turning into highly dense mixture, which flows through a mixture outlet 22 into a mixing chamber 37. In the mixing chamber 37, the mixture sent from the vaporizing chamber 47 and the air sent from a carrying passage 34 are uniformly mixed with each other and, after that, fed to a combustion part 48 in the form of mixture. At the combustion part 48, the mixture is jetted from the finely divided jets 43 of a flame port plate 42 and ignited and burnt and finally burnt completely by feeding the secondary air to the flame through secondary air jets 44.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to promoting mixing of air-fuel mixture in a vaporized liquid fuel combustion device.

2. Description of the Related Art A conventional vaporized liquid fuel combustion apparatus of this type was constructed as shown in FIG. 1 is a heater, 2 is a vaporizer cylinder, 3
is the vaporizer lid, 4 is the burner port plate, 5 is the burner port net, 6 is the burner port cap, 7 is the rotor, 8 is the swinging plate, 9 is the mixing blade, 1o is the oil supply pipe, 11 is the insulation material, 12 is the combustion 13 is a motor, 14 is a fuel pump, 15 is a fuel tank, 17 is a secondary air port, and 18 is a secondary air guide.

When the heater 1 is energized and the vaporization tube 2 rises to a predetermined temperature, the motor 13 is driven, and the rotor 7, swing plate 8. Mixed blade9. The combustion fan 12 rotates.

On the other hand, fuel is pumped up from the fuel tank 15 by the fuel pump 14 and discharged onto the rotor 7 via the fuel pipe 10, and is evenly distributed from the outer circumference of the swing plate 8 by the centrifugal force of the rotating rotor 7 and the swing plate 8. It is scattered and atomized. The nized fuel is vaporized on the heated inner wall (vaporization surface 16) of the vaporization cylinder 2, and mixed with primary combustion air supplied into the vaporization cylinder by the combustion fan 12 to form an air-fuel mixture. . The air-fuel mixture is further uniformly mixed by the rotating mixing blade 9, and is ejected from the burner net 5 via the vaporizing tube lid 3 and the burner port plate 4.
ignited and combusted by an igniter (not shown), while
Secondary air for combustion is supplied to the secondary air port 17 by the combustion fan 12.
It is ejected from the air and guided to the combustion flame by a secondary air guide, resulting in complete combustion.

Problems to be Solved by the Invention However, in the above configuration, in order to perform combustion in a blue flame state that is considered to be a good flame at the flame port, it is necessary to
Because it is necessary to maintain the primary air ratio Pa (primary air amount in the mixture/theoretical air amount) at 0.7 or higher, a large amount of primary air enters the vaporization cylinder and cools the vaporization cylinder significantly. However, there were problems in that the vaporizer cylinder could not be maintained at a predetermined temperature, and that the amount of electricity applied to the heater was large in order to maintain the predetermined temperature.

The present invention solves the above-mentioned conventional problems. It prevents the vaporizer from being cooled by air, suppresses the amount of electricity supplied to the heater, maintains it at a predetermined temperature, and evens out the air-fuel mixture to the flame opening. The purpose is to achieve good combustion.

Means for Solving the Problems In order to solve the above problems, the liquid fuel combustion device of the present invention divides primary combustion air supplied from a blower fan,
One of the air is guided to the vaporization chamber as vaporization air, and the remaining air is guided as conveyance air to the mixing chamber bypassing the vaporization chamber, and the mixture is driven by a motor to feed the conveyance air and the mixture from the vaporization chamber into the mixing chamber. It is equipped with mixing blades for uniform mixing.

According to the present invention, with the above configuration, cooling by the primary combustion air in the vaporization cylinder is significantly reduced, it becomes easy to maintain the vaporization cylinder at a predetermined temperature, and the amount of electricity applied to the heater can be significantly reduced. The air-fuel mixture to the flame nozzle is made uniform, and the flame at the flame nozzle is uniform, resulting in good combustion.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIG. 1. In FIG. 2, 19 is a heater, 20 is a vaporizer cylinder, 2
1 is the carburetor cylinder lid, 22 is the air-fuel mixture outlet, 23 is the rotor, 2
4 is a swinging plate, 25 is a motor shaft, 26 is a motor, 27
is the oil supply pipe, 28 is the pump, 29 is the vaporization air inlet, 30
is a vaporization air intake port, 31 is a heat insulating material, 32 is a vaporizer cylinder cover, 33 is an air passage, 34 is a conveyance air passage, 35 is a mixing passage, 36 is an air-fuel mixture inlet, 37 is a mixing chamber, 38 is a mixing blade, 39 is a partition plate, 40 is a mixture port, 41 is a secondary air jet passage, 42 is a flame port plate, 43 is a mixture jet port, 44 is a 2
A secondary air outlet, 45 is a secondary air passage, 46 is a blower fan, and 47 is a vaporization chamber.

In the above configuration, the heater 19 is energized and the vaporizer cylinder 20
When heated to a predetermined temperature, the motor 28 is activated, and the rotor 23, swing plate 24, and mixing blade 38, which are integrally attached to the motor shaft 25, rotate. On the other hand, the liquid fuel is pumped up from a fuel tank (not shown) by the pump 28 and discharged onto the rotor 23 via the fuel supply pipe 27, and is also caused by the centrifugal force of the rotating rotor 23 and the swing-off plate 24 to cause the swing-off plate 24 to Disperses evenly from the outer periphery.
Atomized. The atomized fuel is transferred to the heated carburetor 20
At the same time, it is vaporized on the inner wall of the vaporizer, and mixed with a small amount of vaporizing air supplied to the vaporizing chamber 47 via the vaporizing air intake port 30 and the vaporizing air port 29 by the ventilation fan 46 to form a highly concentrated air-fuel mixture. , flows out from the air-fuel mixture outlet 22.

On the other hand, most of the air from the blower fan 46 is transferred to the vaporizer cylinder 2.
Vaporizer cylinder cover 32 that covers the outer periphery of 0 with a heat insulating material 31 in between.
At the same time, a part of the air flows from the conveying air passage 34 into the mixing chamber 37 through the mixture inlet 36 opened at the bottom of the mixing passage 35, and the rest flows into the secondary air passage 45. do. Further, the above-mentioned air-fuel mixture outlet 22 is arranged opposite to the air-fuel mixture inlet 36, and the high-concentration air-fuel mixture from the vaporization chamber 47 also flows into the mixing chamber 37. A mixing blade 38 rotated by the motor 26 is disposed in the mixing chamber 37, and uniformly stirs the air-fuel mixture from the vaporization chamber 47 and the air from the conveyance passage, thereby achieving a primary air ratio Pa =
An air-fuel mixture of approximately 0.7 to 1.5 is supplied to the combustion section 48 from an air-fuel mixture port 40 opened approximately in the center of the partition plate 39. In the combustion section 48, the mixture from the mixture port 40 is ejected from the mixture jet port 43 of the segmented flame port plate 42, and is ignited by an ignition device (not shown) and combusted. Further, the plurality of subdivided secondary air jetting passages 41 are communicated with a secondary air passage 45 at their ends (not shown), and secondary air is supplied to the flame from the secondary air jetting ports 44. complete combustion.

Effects of the Invention As is clear from the above explanation, according to the liquid fuel combustion apparatus of the present invention, (1) primary air for combustion is divided, a small amount of air is supplied to the vaporization chamber, and a small area is By leaving the air-fuel mixture outlet and covering the outer periphery of the vaporizing cylinder with a heat insulating material, cooling by air and heat radiation from the outer periphery of the vaporizing cylinder can be reduced.
The amount of electricity applied to the vaporizer cylinder heater can be reduced.

(2) The air-fuel mixture from the vaporization chamber and the conveying air are uniformly stirred and mixed in the mixing chamber by a mixing blade driven by a motor, and the mixture is supplied to the combustion section as a uniform air-fuel mixture. It is possible to prevent unevenness such as fire and blow-off and obtain good combustion.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view showing a liquid fuel combustion device according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing a conventional combustion device. 19...Heater, 20...Carbonizer, 2
3...rotor, 24...swinging plate,
26...Motor, 37...Mixing chamber, 3
8... Mixing blade, 39... Partition plate, 4
0...Mixture air port, 45...Secondary air passage, 46...Blower fan, 47...Vaporization chamber. Name of agent: Patent attorney Shigetaka Awano Haka 1/9- Heater zo-2\I and 1i 26-Motor J7---X-Kai! 38- Kokon Onaga Figure 2

Claims (1)

[Claims] A vaporizing cylinder heated by a heater and having a vaporizing chamber formed therein; an atomizing means disposed in the vaporizing chamber for atomizing fuel; A liquid fuel comprising: a blower fan that supplies vaporizing air; a mixing chamber that mixes the air-fuel mixture from the vaporizing chamber with conveying air; and a mixing blade that is arranged in the mixing chamber and rotated by a motor. Combustion device.