JPH01305211A - Vaporizing device - Google Patents

Abstract

PURPOSE:To prevent the drop of splashed fuel on a fan, by a method wherein, in the vaporizing device of a vaporization type liquid fuel combustion device, the vaporizing surface of a vaporizing cylinder is formed in a taper in which the size thereof is increased in the direction of the flow of air for vaporization in a vaporizing cylinder. CONSTITUTION:A vaporizing surface 34 of a vaporizing cylinder 19 is formed in a taper in which the size thereof is increased in the reverse direction to that of the flow of air for vaporization or that toward a combustion fan 29 in the drawing. In this constitution, a shock force when atomized fuel from a shake-off plate 24 is collided with the vaporizing surface 34 is decreased because of the vaporizing surface 34 being formed in a taper, and re-splashing occasioned by collision is suppressed. Further, even if the fuel re-splashes, it is collected to the downstream side of an air flow for vaporization and is suppressed from splashing of it to the combustion fan 29 side. This constitution enables prevention of flying of fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the vaporization section of a vaporization type 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. That is, 1 is a heater, 2 is a vaporizer cylinder, 3 is a vaporizer cylinder lid, 4 is a burner port plate, 5 is a burner port net,
6 is a flame port cap, 7 is a rotor, 8 is a shaker plate, 9 is a mixing blade, 10 is a fuel supply pipe, 11 is a heat insulator, 12 is a combustion fan, 13 is a motor, 14 is a fuel pump, 15 is a fuel In the above configuration which is a tank, when the heater 1 is energized and the vaporization cylinder 2 rises to a predetermined temperature, the motor 13 is driven and the rotor 7
, Shaking board 8. Mixed blade9. The combustion fan 12 rotates. On the other hand, fuel is supplied to the fuel tank 1 by the fuel pump 14.
5 and is pumped up to the rotor 7 via the oil supply pipe 10.
The liquid is discharged upward, and is evenly scattered and atomized around the outer circumference of the shaking plate 8 by the centrifugal force of the rotating rotor 7 and the shaking plate 8. The atomized fuel is vaporized on the heated inner wall (vaporization surface 16) of the vaporization cylinder 2, and
It mixes with combustion air supplied by the combustion fan 12 to form an air-fuel mixture. The air-fuel mixture is further uniformly mixed by the rotating mixing vane 9, and is ejected through the vaporizing tube cover a and the flame port plate 4 to the flame port net 5, and is ignited by an igniter (not shown) and combusted. .

Problem to be Solved by the Invention However, since the vaporizing surface 16 is arranged almost perpendicular to the direction of the fuel scattering from the shaker plate 8, the fuel that collides with the vaporizing cylinder 16 is Due to the reaction, a part of the air is splashed back, passes through the combustion air passage 17 from the combustion fan 12 into the vaporization cylinder 2, and falls toward the combustion fan 12.
There was a problem that the combustion fan 12 etc. got wet with fuel.

This problem may also be due to the fact that the temperature of the gas cylinder 2 is higher than 30.0"C, the rotation of the shaking plate 8 is high, and the speed at which the fuel collides with the vaporization surface is high, or the combustion If the amount of air was small and the flow velocity in the combustion air passage 17 was low, the problem would become even bigger.1 The present invention solves the above problems and provides a vaporizer that suppresses the scattered fuel from falling into the combustion fan. It is something to do.

Means for Solving the Problems In order to solve the above-mentioned problems, the vaporizer of the present invention has a vaporizing surface tapered so that the diameter increases toward the downstream part of the vaporizing air in the vaporizing cylinder. It is something.

In the configuration described in Section 2 of "Effect," the fuel that is radially scattered and atomized by the atomization means collides obliquely with the vaporization surface, and the amount of fuel scattered from the vaporization surface due to the impact at the time of collision is reduced. As the amount decreases, the scattered fuel particles will concentrate in the downstream direction of the vaporizing air flow in the vaporizing cylinder.In addition, large amounts of fuel particles may fly out from the vaporizing air inlet of the vaporizing cylinder and wet the combustion fan and other parts. do not have.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 1st
In the figure, 18 is a heater, 19 is a vaporizer cylinder, 20 is a vaporizer cylinder lid, 21 is an air-fuel mixture outlet, 22 is a vaporization air inlet, 23
is the rotor, 24 is the swing plate, 25 is the oil supply pipe, 26
is a fuel pump, 27 is a fuel tank, 28 is a motor shaft, 2
9 is a combustion fan, 30 is a motor, 31 is a conveying air inlet,
32 is a mixing plate, 33 is a flame port, 34 is a vaporization surface, and 35 is a secondary air supply port. 3) In the above configuration, when the heater 18 is energized and the vaporization tube 19 is heated to a predetermined temperature, the motor 30 is driven. The rotor 23, swing plate 24, and combustion fan 29, which are integrally attached to the motor shaft 28, rotate. Combustion fan 29
The combustion air supplied by is divided into three parts, the first air flow passes through the vaporizing air flow 22 and enters the carburetor cylinder 19, and the second air flow passes through the outer circumference of the vaporizer cylinder 19 and enters the conveying air flow 31.
The third air flow enters the mixing chamber 36 through the mixing chamber 3.
6 and flows out through the secondary air supply port 35. On the other hand, the refueling pump 26 is driven to discharge more fuel from the fuel tank 27 onto the rotor 23 via the refueling pipe 25.
Due to the centrifugal force of the rotating rotor 23 and the swing-off plate 24, the liquid is scattered and atomized radially from the outer periphery of the swing-off plate 24. The atomized fuel passes through the heated tapered vaporization surface 3
4 and is vaporized while flowing through the vaporization surface, and mixed with air from the vaporization air intake 22 to form a mixture at Yamaguchi 21.
It flows out to a total amount of 36. One quart of aiki enters the mixing chamber 36, is mixed with air from the conveying air supply 31 by the mixing plate 32, becomes a mixture with a good air ratio for combustion, is ejected from the flame nozzle 33, and is fired by the igniter. (not shown), and complete combustion is carried out by secondary air from the secondary air supply port.

To explain the above operation in detail, the fuel atomized from the shake-off plate 24 collides with the vaporization surface 34, but since the vaporization surface 34 is configured in a tapered shape, the fuel from the shake-off plate 24 collides with the vaporization surface 34. The particles do not obliquely collide with the vaporization surface 34, so the impact force at the time of collision is small, suppressing the re-scattering of fuel generated at the time of collision, and the taper of the vaporization surface 34 allows the vaporization tube 1
Since the diameter of the fuel particles increases as the vaporizing air flow becomes downstream in the vaporizing surface 34, the fuel particles re-splattered at the vaporizing surface 34 are concentrated and scattered in the downstream direction of the vaporizing air flow. It is possible to suppress fuel particles from flying out from the vaporizing air population 22 located upstream of the vaporizing air flow toward the combustion fan 29 side. The effect of preventing scattered fuel particles from flying out of the vaporization cylinder by this vaporization surface taper is that the amount of air flowing into the vaporization cylinder is small, and the air velocity at the vaporization air port 22 is low, so that fuel particles are caused by the air flow. It is particularly effective when no shielding effect can be expected.

Effects of the Invention As is clear from the above description, according to the vaporization device of the present invention, the vaporization surface that vaporizes the fuel atomized by the rotary atomization device is positioned downstream of the vaporization air flow in the vaporization cylinder. Because the diameter is tapered so that the diameter expands as the temperature increases, the fuel particles generated when the fuel collides with the vaporizing surface fly upstream of the vaporizing air flow, wetting the combustion fan located here and creating an odor. - Prevents the lifespan of equipment from being shortened. Furthermore, since the fuel from the atomizer collides obliquely with the vaporization surface, the fuel does not vaporize while flowing down the slope at the vaporization surface. can be suppressed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vaporizer in an embodiment of the present invention;
FIG. 2 is a sectional view showing a conventional combustion device. 19... Carburizer tube, 23... Rotor, 24
・・・・・・Shaking plate, 29 ・・Combustion fan, 3
0... Motor, 34... Vaporization surface. Name of agent: Patent attorney Toshio Nakao and 1 other person19
- Vaporization time 1) -1 〇 - Da 24--1i Rijin σsu 4 to 2? - Constant liquid face 30... - Motor screen - Vaporization surface Fig. 1 Of course 3゜ Fig. 2 □・, ＼ 5

Claims (1)

[Claims] A motor disposed in the combustion air supply system, an atomizing means rotated by the motor to atomize the fuel in a circumferential direction, and a vaporizing cylinder disposed covering the atomizing means and equipped with a heater, A vaporizing device in which the vaporizing surface on which fuel from the atomizing means collides and vaporizes is tapered so that the diameter increases along the flow direction of the vaporizing air in the vaporizing cylinder.