JPS61128014A - Petroleum combustion device - Google Patents

Abstract

PURPOSE:To enable a large amount of radiation heat to be provided by a method wherein a red heated part of porous plates constituting a flat combustion chamber which faces against a window is constituted by a separate member which is separate from the other portions. CONSTITUTION:Fuel gasified from a wick 11 is mixed with air in a combustion chamber 17 which is flowed through small holes 15 and large holes 15' and burned with it. The red heat plate 16' having some large holes 15' closely formed thereto showsan excessive hot temperature under this combustion heat, resulting in making a red-heated condition. Therefore, a difference in temperature in the porous plate 16 and the red heat plate 16' becomes excessive and a large difference can be generated in both thermal expansions of both members. However, since the porous plate 16 and the red heat plate 16' are constituted by separate members, the circumference of the red heat plate 16' having a large thermal expansion volume is not fixed to the porous plate 16 having a low thermal expansion volume and the difference in thermal expansion is absorbed by the supporting grooves and the bending deformation of the plate is not produded. Therefore, an incomplete combustion caused by an irregular combustion and the dispersion in red heat in the red heat plate 16' are not produced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wick vaporization type flat oil combustor, which can be used in stoves, dryers, etc.

2. Prior Art A conventional oil combustor of this type is, for example,
As shown in Japanese Patent No. 183, the structure was as shown in FIG. That is, a flat combustion chamber 4 constituted by a perforated plate 3 having a large number of air holes 3a is placed on a fire pan 2 holding a flat lamp wick 1, and an outer cylinder 6 is placed on the outside of the combustion chamber 4. It is provided. A window member 6 made of heat-resistant glass is provided in a part of the outer cylinder 6. The number 8 is a red-hot coil, and the number 8 is a heat dissipation net. Note that the perforated plate 3 has an integral structure from top to bottom.

Problems to be Solved by the Invention In the structure as described above, it is extremely difficult to avoid thermal deformation of the perforated plate 3 during combustion and to supply a large amount of radiant heat through the window 6. This is due to the following reasons.

That is, since the combustion chamber 4 has a flat shape, the perforated plate 3 is heated during combustion, thermally expands, and tends to extend not only in the vertical direction but also in the longitudinal direction. If at least the flat surface of the perforated plate 3 is heated uniformly, the width of the combustion chamber will increase only slightly, and there will be no major effect. However, if there is a temperature difference in the vertical direction, the lower part, which is colder, will expand. is small, whereas the upper part, which is heated to high temperatures, stretches a lot, and therefore, while the full width of the lower part is restricted, the full width of the upper part becomes excessive, causing it to curve significantly back and forth. Especially the air hole 3 in the part facing the window member 6
If you try to make this part red hot by increasing the diameter of & or making it denser to reduce the heat capacity of this part, the amount of radiant heat from the window member 6 will increase, but as mentioned above, The temperature difference with the lower part of the porous plate 3, that is, the difference in thermal expansion amount becomes large. When the perforated plate 3 bends and deforms, the cross-sectional area of the combustion chamber 4 changes, and the flow rates and streamlines of fuel and air change.
Normal complete combustion cannot be maintained. In this way, when the perforated plate 3 is made into an upper and lower integrated structure as in the past (the same is true when the two are joined even if they are composed of separate members), in order to obtain a sufficient amount of radiant heat from the window member 6, it is necessary to There was a problem in that the perforated plate 3 could not be heated to a red hot state.

The present invention solves the above problems and aims to heat the perforated plate facing the window member to a high temperature without causing incomplete combustion due to deformation of the combustion chamber, thereby making it possible to obtain a large amount of radiant heat. be.

Means for Solving the Problems In order to solve the above problems, the oil combustor of the present invention includes a separate member in which the red-hot part facing the window is separated from other parts of the perforated plate constituting the flat combustion chamber. It is made up of.

゛Operation With the above configuration, the high temperature part and the low temperature part of the perforated plate can be divided, and thermal strain therebetween can be released. Therefore, the high temperature part can be made sufficiently red hot and can provide radiant heat at a high rate.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In Fig. 2, numeral 11 is a flat lamp wick, and the upper part is a fire pan 1.
The lower part is housed in a tank 13 and moves up and down in conjunction with the rotation of a knob 14. On the fire pan 12 is a perforated plate 16 having a large number of air holes 16.
A combustion chamber 17 composed of a large-opening incandescent plate 16' having a large hole 16' is placed therein, and an outer cylinder 18 is provided on the outside of the combustion chamber 17. In addition, the incandescent plate 1 of the outer cylinder 18
A window member 1 made of heat-resistant glass is installed in the portion facing 6′.
9 is provided.

As shown in FIG. 1, the structure of the combustion chamber 17 is such that the rear and front lower portions are formed by a perforated plate 16 having small holes 15, which are machined into an L-shape, and large holes 16' are closely arranged. A perforated incandescent plate 16' is attached, and both sides of the incandescent plate 16' are inserted and locked into support grooves 16& provided on both sides of the perforated plate 16 with a margin. In addition, a plurality of slit-like grooves 20 are provided in the upper and lower middle of the incandescent plate 16' in the vertical direction, and a υ-shaped support 21 is provided at the upper end.
is sealed.

The operation of the above configuration will be explained next.

During combustion, the fuel vaporized from the lamp wick 11 burns in the combustion chamber 17 while mixing with the air flowing in from the small holes 16 and large holes 15', but the combustion heat burns the porous plate 16 and the incandescent plate 16'. heated. In particular, the red-hot plate 16', which has large holes 16' formed closely, becomes extremely hot and reaches a red-hot state. Therefore, the perforated plate 16 and the incandescent plate 16 at the lower front of the combustion chamber 17
The temperature difference between the two becomes large, resulting in a large difference in the amount of thermal expansion between the two.

However, since the perforated plate 16 and the incandescent plate 16' are constructed as separate members, the incandescent plate 16', which has a large amount of thermal expansion, is fixed to the perforated plate 16, which has a small amount of thermal expansion. The difference in thermal expansion amount is absorbed by the support groove 162L without causing any bending deformation. Further, by providing a plurality of grooves 2o in the incandescent plate 16', the horizontal elongation of the incandescent plate 16' is absorbed by the grooves 20, so there is no need for sliding in the support groove 162L, as shown in FIG. Even if spot welding is performed at the welded portion 16b as shown in FIG.
curvature is avoided. Thus, the combustion chamber 17 is formed by the perforated plate 1
6 and the incandescent plate 16' when ignited, there is no deformation and the flat shape can be maintained almost the same as when it is cold, so there is no incomplete combustion due to uneven combustion or uneven redness of the incandescent plate 16' as in the past. Since the heat capacity of the incandescent plate 16' is sufficiently small to make it red-hot, a large amount of radiant heat can be supplied forward through the window member 19, and the heating effect can be significantly enhanced.

Effects of the Invention As described above, the oil combustor of the present invention suppresses the deformation of the flat combustion chamber by configuring the red-hot part, which has an important opening, as a separate member from the other perforated plates in the combustion chamber. In addition to maintaining uniform combustion, it is possible to raise the temperature of the red-hot part to a sufficiently high temperature, thereby increasing the amount of radiant heat supplied.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of essential parts of an oil combustor according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the same oil combustor, and FIG. 3 is an exploded perspective view of an oil combustor according to another embodiment of the invention. Main parts exploded perspective view, 4th
The figure is a vertical sectional view of the main parts of a conventional oil combustor. 11...Light wick, 15...Small hole, 16'
......large hole, 16...-perforated plate, 16'.
...Incandescent plate, 162L...Support groove, 18
b...Welding part, 17...Combustion chamber, 18
...Outer tube, 19...Window member, 20...
... Cut groove, 21 ... Support tool. Name of agent: Patent attorney Toshio Nakao and one other person Maki
1 Figure 15-----No1\; ``Mut, s 16 Figure 2 U---Ittoji tS----No1\, TL

Claims (2)

[Claims] (1) It has a flat combustion chamber formed by a perforated plate, a flat lamp wick whose tip faces the lower part of the combustion chamber, and an outer cylinder disposed outside the combustion chamber, The upper part of one side plane of the chamber has a large aperture ratio to form a red-hot part, and the outer cylinder facing this red-hot part is provided with a window member made of a heat-transparent material, so that the red-hot part is connected to the other part of the combustion chamber. An oil combustor made of a separate component from the perforated plate. (2) The oil combustor according to claim 1, wherein at least the red-hot part of the combustion chamber is provided with vertical slit-like grooves.