JPS6026208A - Evaporating device - Google Patents

Abstract

PURPOSE:To prevent production of tar through increasing of an evaporating temperature even when evaporation of the fuel containing a high-boiling point component takes place, by a method wherein an air guide is constituted such that a combustion air flowing from the air guide is branched into a flow in which the air is fed in the direction of diameter of an evaporating cylinder together with the fuel and a flow in which the air is fed in a swirl direction. CONSTITUTION:The air for combustion upwardly admits an air guide 24 through a feed port 20 for the air for combustion in the bottom of an evaporating cylinder, but is changed into a horizontal flow in the air guide 24 by means of a shield plate 21. A part thereof is fed in the direction of diameter of an evaporating cylinder 2 through a feed port 27 for the air for combustion together with liquid fuel, and a most of the remaining air for combustion is fed in an evaporating chamber 19 through a swirl passage 25 by means of a swirl flow feed port 26 form a swirl flow in the evaporating chamber 19. Thus, the low velocity part of the velocity of the air or the stagnating portion of the air flow is prevented from occurrence within the evaporating chamber 19, and a scavenging effect brought by the air for combustion can be strongly exerted on liquid fuel particle, fell on the bottom of the evaporating cylinder, throughout the entire bottom of the evaporating cylinder. This enables rapid evaporation of the fuel particle with the aid of a swirl flow as it is moved over the bottom of the evaporating cylinder even if the temperature of a wall surface is high, and permits stable evaporation thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The industrial field of application relates to a vaporizer that vaporizes liquid fuel and mixes it with combustion air to supply an air-fuel mixture to a combustion section.

Structure of a conventional example and its problems A conventional vaporizer 1"l" of this type is shown in FIGS. 1 and 2.

A refueling port 5 and a feeder arrow 1-16, which are connected to a refueling pump 3 and a combustion fan 4, respectively, are opened in the side wall of a pot-shaped vaporizing cylinder 2 heated by a heater 1. A mixing plate 8 in which a mixture passage 7 is opened and a burner head 10 in which a flame 1-19 is formed are disposed in a part 1-1 of the vaporizing cylinder 2. A vaporizing chamber 11 is defined by the mixing plate 8 and the mixing plate 8, and a mixing chamber 12 is defined between the mixing plate 8 and the burner head 10. 1. Memo+
In the l'llll configuration, the heater 1 is energized and the vaporizer cylinder 2 is turned on.
When the fuel is heated and reaches a predetermined temperature, the fuel pump 3 and fuel TFL fan 4 are activated to supply liquid fuel and combustion air to the vaporization chamber 11. The liquid fuel P1 that has entered the vaporization chamber 11 is vaporized on the inner wall surface of the vaporization cylinder 2, mixed with combustion air, and enters the mixing chamber 12 through the air-fuel mixture passage 7. Mixing chamber 12
There, the air-fuel mixture is further mixed evenly and ejected from A I-l 9 of the burner nozzle 10, and is ignited by an igniter i"l' (not shown) to burn.
will be carried out.

However, in the conventional example described above, the vaporization wall temperature is as low as about 230°C to 280°C, and the temperature of the denatured oil and "R quality 111" is low.
1. When you vaporize fuel that does not cool your labor, it becomes vaporized.
There was a problem with the amount of cool coating on the inner walls of the 7i 2, making it difficult to ignite and creating a strong odor after the fire was extinguished. Ingredients that are generally included in fuel and are easy to cool: Q! ″5i'Jl
Is it an i-point component and a vaporized component? Wul melon, i”li
(Nakasei-Ki ``1'' of the cool-down method is rainproof, but in the conventional example described in ``-'', stable vaporization could not be achieved when the vaporization wall temperature was increased by 11° Hi.

That is, the liquid fuel PI sent out from the fuel supply [15] collides with the opposite side IY and 13 (hereinafter this part will be referred to as the I'T ground) of the vaporization 9112's fuel supply ILJ5, but the wall surface 1! 'i+ 171A, only a part of it vaporizes, most of it disperses as fine particles and falls to the bottom of the vaporizer cylinder 1S
Vaporization takes place in the form of fine particles. However, the combustion air is sent to the vaporizer cylinder side 1 (1') together with the liquid fuel.
Not only is the combustion air blown out at The airflow that folds in and forms the vortex 1AL is peeled off, and stagnation of the airflow has occurred at the center of the vortex 1AL.

Therefore, at the bottom where fuel vaporization is slow,
There is only a weak airflow on the bottom surface other than near the ground 13 < 4, j Not only does the vaporization interval of the fuel particles become longer, but also vaporization occurs irregularly after they coalesce into giant particles J'L, resulting in unstable vaporization and combustion at the throat 1o of the burner. 4I is also unstable and flares up.
In the case of fi,, ii, l, misfires may occur.

The "1-1 misfire of Jlj" solves the above problems in the conventional example, and it is also a cool medium formation /
The purpose of this invention is to prevent cl- and prolong the life of the vaporized charge, as well as to obtain a stable vaporized state.

Configuration of Origin 1 In order to achieve objective I-1, the present invention provides an air guide on the bottom surface of the carburetor cylinder for sending combustion air together with liquid fuel into the vaporization chamber, and also provides combustion air to the air guide side 11 ( A Suita combustion air outlet is provided in the diametrical direction of the vaporizer 1111 together with fuel, and a swirling outlet is provided for blowing out the fuel in the swirling direction into the vaporizing chamber.

This +1'1. As a result, the fuel particles that are split and scattered on the high-temperature side wall of the vaporization cylinder and fall to the bottom surface are 111 of the combustion air that has become a swirling flow and is sent out from the air guide.
) Due to the gas effect, vaporization is rapid and stable. It's a high-temperature vaporization! Since the vaporization is carried out by the process, the amount of raw tar is rain-proofed.

Explanation of the Example Hereinafter, an example of the misfire rllJ will be explained using FIGS. 3 and 4.

At the center of the bottom of the crucible-shaped vaporization tube 2 heated by the heater 1, there are provided a fuel supply pipe 5 and a feed pipe 6 connected to a fuel pump 3 and a combustion fan 4, respectively. A mixing plate 8 with a mixture passage 7 is provided in the L1 part, and a rectifying tube 10 with a large number of small holes 9 is provided in the second part, and a rectifying AC space 11 is provided around it. A wire mesh combustion section 12 is provided through a rectifier fill 10 and a combustion tube 1.
A combustion chamber 13j4 is provided, which is constituted by an air-fuel mixture cap 13 that closes the upper end of the combustion chamber 2. Around the combustion tube 12, a glass outer space 16 is arranged which is closed by a combustion cap 14 and forms a combustion space 15 between the combustion tube 12 and the combustion tube 12. At the same time, the upper end of the outer cylinder 16 is supported by an exhaust pipe 18 which is disposed around the outer periphery of the vaporizer 11112 and has an exhaust pipe 1117 opened on its side i1t.On the other hand, the upper end of the outer cylinder 16 is The vaporization chamber 19 is provided with a shielding plate 21 which is larger than the combustion air supply port 20 opened at the center of the bottom of the vaporization cylinder 2 and arranged opposite to each other, and a shielding plate 21 that is integrated with the shielding plate 21 to supply vaporized air from the outer periphery of the shielding plate 21. An air guide 24 is disposed, which is composed of a side wall 22 reaching the bottom surface of the vTi 2 and a heat shield plate 23 provided inside the side wall 22. Also, inside the air guide 24, as shown in FIG. 22 and a swirling vane 29 integrally disposed within the air guide 24, a swirling passage 25 is formed.
There is an opening 1" in the side wall 26 or 22. Furthermore, air guide 2
A tit combustion air blowout 1127 is opened on the side wall 22 of No. 4, and is connected to the fuel supply pipe 5.
A refueling nozzle 28 diametrically arranged i'r is open 11 facing the combustion air outlet 1127 .

I will explain about the work of 7 Ukuni 1υ. When the heater 1 is energized and the vaporizer tube 2 is heated to a predetermined temperature of 41 degrees, the combustion fan 4 and the fuel pump 3 are activated, and combustion air is supplied to the blower tube 6, the combustion air supply port 20. The liquid fuel is supplied to the vaporization chamber 19 via the air guide 24, and the liquid fuel is sent to the vaporization chamber 19 through the fuel supply pipe 5 and the fuel supply nozzle 28f. At this time, the fuel collides with the high-temperature side wall of the vaporizer tube 2 at almost a right angle, so the fuel rebounds on the landing surface, splits, and scatters with a strong force, becoming fine particles that fall to the bottom of the vaporizer@2. .

On the other hand, the combustion air is supplied from the combustion air supply 1-120 at the bottom of the carburetor cylinder.
The air enters the air guide 24 in two directions, or is changed into a horizontal flow within the air guide 24 by the shielding plate 21, and a part of the air flows through the combustion air outlet 27 along with the liquid fuel into the vaporizer cylinder 2. Although it is sent out diametrically,
Most of the remaining combustion air passes through the swirling passage 25 and is sent to the vaporization chamber 19 through the swirling passage 25, forming a swirling gap. The liquid fuel particles that fall to the bottom iol of the vaporization cylinder, without the stagnation point of the high flow rate or 2-mega of air, can be strongly scavenged by the entire bottom of the vaporization cylinder -C combustion air, so the wall surface π9 degrees is high temperature. Even if it is, there is only one grain J'&
Due to the J rotation M, the gas is rapidly vaporized without moving on the bottom surface of the vaporizing cylinder, and stable vaporization can be obtained. Heat shield plate 23 il, air guide shield plate 21 and side wall 22 are kept at a relatively high temperature of 11♂1 to prevent re-liquefaction of the air-fuel mixture: Cooled by hot baking air 1° of the refueling nozzle:
'i+? It plays the role of an insulating paulownia to prevent the formation of Ma. Note that a small amount of combustion air sent out from the combustion air outlet provided in the air guide 24 is sent to the fuel supply nozzle 2.
The fuel supplied from the fuel nozzle 8 is delivered and guided into the vaporization chamber 19, and the fuel supply nozzle 28 is cooled.

The fuel vaporized in the vaporization chamber 19 is mixed with combustion air, and the mixture is further uniformly mixed in the mixing chamber formed inside the combustion section by moving the mixing plate 8 to j+n. /iLsaizru. Further, the air-fuel mixture is injected from the small hole 9 of the L cylinder 10, ignited (the ignition device: i'1'' is not shown), and burned on the surface of the combustion fi'tj 12, and the combustion heat is 1 red heat is applied to the combustion tube 12. Radiant heat due to the red heat is generated by the glass outer tube 16 (
L- is dissipated through j1° b〆1 information υI
The gas & J combustion space 15f: passes through to the 1: part/4U, and is ejected from the exhaust port 17 of the υl cylinder 18, or at that time, contacts the outer circumferential wall of the vaporizing cylinder 2 and heats the vaporizing cylinder 2, Heat recovery for vaporization is performed.

Theory 1 beyond the effect of origin 1. An air guide for blowing out combustion air into the vaporization chamber is installed on the bottom of the vaporization chamber, and the combustion air blowing out from the air guide is connected to the vaporization tube together with the fuel. After forming the air guide so as to branch into a flow blowing in the diametrical direction and a flow blowing out in the swirling direction, there is a next effect.

(1) The fuel is vaporized along with some of the combustion air.Since it collides with the side wall at almost right angles, the force of the fuel colliding, splitting and scattering on the wall surface acts strongly, causing the fuel to become finer than 1. Since it becomes fine particles, it can be easily vaporized at the bottom of the vaporizing cylinder.

(2) Much of the combustion air is swirled at the Suita mouth; swirl/%
r, the airflow is closed and blown into the vaporization chamber, and a swirling flow is generated in the vaporization chamber, but no bulge of airflow j Is the fuel that has fallen all over the bottom surface? The fuel is rapidly and stably vaporized due to the strong scavenging effect of &, and pulsating vaporization does not occur due to delayed vaporization or the formation of giant tags 11' due to the coalescence of fuel particles.

(3) Since stable vaporization is achieved by the swirling ML, the vaporization wall temperature t + l' is also 11.1 when vaporizing fuel containing a high boiling point. + Can suppress Medecool's first blow.

(4) Fuel (Since it is vaporized over the entire bottom surface of the J vaporization cylinder, the vaporization load per unit area is small and the generation of cool can be suppressed.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a conventional vaporizer; Fig. 2 is a sectional view taken along the line A-A in Fig. 1; Fig. 3 is a vertical sectional view showing an embodiment of the vaporizer for failure 1; The figure is a sectional view taken along the line B-B in FIG. 3. 1... Heater, 2... Vaporizer cylinder, 3...
Fuel pump, 4... Combustion fan, 20... Combustion air supply port, 22... Air guide side wall, 24...
...Air guide, 25 ...Swivel passage, 26...
...Swirling flow outlet 1.27... Combustion air outlet, 2
9...Swirl blade. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure? Figure 3

Claims (3)

[Claims] (1) A pot-shaped vaporization cylinder heated by a heater and having a combustion air supply port on the bottom, and a fuel supply means and a combustion air supply means connected to the combustion air supply 1, supply combustion air into the vaporization cylinder. A vaporizer equipped with an air guide that is disposed opposite to a supply port and branches combustion air into a flow that blows out along with fuel in a diametrical direction of a vaporizer cylinder and a flow that blows out in a swirling direction. (2) Connect the outer peripheral side wall of the air guide to Ijq combustion air supply [
If it is located outside J, the combustion air outlet 1-1 and the swirling air outlet will be opened on its side wall, and the swirling vane will be placed in the air guide near the swirling outlet +2+.
4J, rI - The vaporizer according to claim 1 1'
. (3) Compared to the air J'll that does not blow out in the diametrical direction of the carburetor cylinder,
Turning) j li: ij K blowing air J il brings good luck /
and especially, rl; the vaporizer according to claim 1.