JPS61240012A - Kerosene burner - Google Patents

Abstract

PURPOSE:To ensure the uniformity of red hot state and contrive to keep the complete combustion by increasing the amount of heat radiated and dissipated by forming a structure wherein the rate of opening in both side parts of a red hot part, which is arranged at the upper part of one side flat of a flat combustion chamber and the central part of which has a large rate of opening, is made smaller than that of the central part of the red hot part, and at the same time at least the middle and upper portion between both side parts and the central part are separated from each other. CONSTITUTION:Because the rate of opening of both the side parts 9b of a red hot part 9 is lowered than that of its central part 9a so as to suppress the influx of excess air, the air-fuel ratio is properly kept so as to be able to ensure the complete combustion over the whole width of a combustion chamber 7. On the other hand, because the temperatures of the central part 9a and both the side parts 6b are thermally separated from each other by separating the parts 9a and 9b from each other with slits 9c provided between the parts 9a and 9b, no heat dissipation by conduction from the central part 9a to both the side parts 9b occurs and consequently the central part 9c is fully heated up to high temperature over its whole region. Accordingly, a large amount of radiant heat can be supplied through a heat-resisting glass 10a to the front face of an outer tube 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wick type oil combustor having a flat combustion chamber used for space heating, heating, drying, etc.

BACKGROUND OF THE INVENTION A wick type oil combustor having a flat wick and a flat combustion chamber has a structure in which the aperture ratio of the flat part of the combustion chamber facing the window provided with the heat ray transmitter is the same over the entire width.

Problems to be Solved by the Invention In the above-mentioned conventional combustor, it is difficult to achieve uniform combustion due to the flattening of the combustion chamber during combustion, and therefore it is easy to cause uneven red heat on the walls of the combustion chamber. Ta. In other words, during combustion, the combustion chamber is heated by the flame and high-temperature exhaust gas and becomes red-hot, but in a so-called bicylindrical combustion chamber made of double cylinders, there is no end, so the combustion state is constant over the entire circumference. Non-uniformity of temperature was unlikely to occur, and therefore, there was almost no deviation in temperature, and a uniform red-hot state could be obtained. However, in a so-called linear combustor that has a flat-shaped combustion chamber, the conditions on both sides of the combustion chamber in the longitudinal direction are different from the central part, and the fuel concentration is diluted and the amount of combustion is small. The area is larger than that of the central part, and the temperature of the combustion chamber is significantly lower than that of the central part. This decrease in red-hot temperature is not limited to only the ends, but also leads to heat conduction cooling of adjacent parts, and the combustion chamber wall exposed to the window of the outer cylinder has a large deviation in red-hot state between the center and side parts. It was a presentation.

In addition to this uneven red-hot state, lean combustion at both ends tends to cause incomplete combustion, which can emit large amounts of carbon monoxide into the combustion exhaust gas and generate odor and soot. This also led to combustion abnormalities.

The present invention aims to eliminate the above-mentioned conventional drawbacks, ensure uniformity of the red heat state in a linear combustor, and maintain complete combustion while increasing the amount of radiant heat radiation.

Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is to make both sides of the red-hot part with a large aperture ratio, which is provided at the upper part of one side plane part of the flat combustion chamber, from the center part. In addition to setting the aperture ratio, at least the upper middle portion between the two is separated.

Effect: By the above means, it is possible to eliminate the fuel lean state at both ends of the combustion chamber, ensure complete combustion in the entire area of the combustion chamber, prevent heat radiation due to heat transfer at both sides, and maintain high temperature and uniform red heat in the red-hot part. .

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In Fig. 2, 1 is a flat lamp wick, equipped with a rack 2 on the lower side, and a binion 4 interlocked with an operating knob 3.
It engages with the core cylinder 6 and moves up and down while being held between the core cylinders 6. A horizontally long flat combustion chamber 7 made of a perforated plate having small-diameter air holes 7a and large-diameter air holes 7b is placed on the fire pan e provided at the upper end of the wick cylinder 5. is surrounded by an outer cylinder 8. The upper front surface of the combustion chamber 7, which has a large diameter air hole 7b formed therein, is a red-hot part 9 with a small heat capacity, and the upper and lower parts are fitted and locked to the thin part 7C. Further, in the outer cylinder 8 facing the red-hot part 9, there is a window 10 equipped with a heat-resistant glass 101L.
is provided. Here, as shown in FIG. 1, the red-hot part 9 has a central part 9& with a large aperture ratio in which large-diameter air holes 7b are densely formed, and a central part 9& in which an appropriate number of small-diameter air holes 7a are perforated. The central portion ea and both side portions 9b are separated by a sleeve 90.

The operation of the above configuration will be explained next.

During combustion, fuel vaporized from the lamp wick 1 is supplied with air from the air holes 71L and 7b in the combustion chamber 7, and is mixed and combusted. At this time, the red-hot part 9, which has a small heat capacity, is heated by the flame and high-temperature exhaust gas and becomes red-hot, but in addition to the fact that the wick 1 is interrupted in the side part of the combustion chamber 7, the amount of heat radiated from the side wall is large. The amount of fuel vaporized is smaller than that at the center.

At this time, if air is supplied with the same aperture ratio over the entire width of the red-hot part 9, there will be too much air in the side parts, that is, lean combustion will be forced, and carbon monoxide, soot, and odor will be generated due to incomplete combustion. result. however,
Here, the opening ratio of the side parts 9b of the red-hot part 9 is lower than that of the central part 9a, and since excessive air inflow is suppressed, the ratio of air to fuel is maintained appropriately, and the entire width of the combustion chamber 7 is Complete combustion can be ensured.

On the other hand, the temperature of this red-hot part 9 can be changed from the center part e& to both sides 9b because a rib) 90 is provided between the center part 9a and both sides 9b to divide the two and thermally separate them. The central portion 9& is heated to a sufficiently high temperature over the entire area without conducting heat radiation, and a large amount of radiant heat can be supplied to the front surface of the outer cylinder 8 through the heat-resistant glass 10&. At this time, the heat capacity of the side parts 9b is large, although the combustion amount here is small, and the red-hot state is inferior to that of the central part 91L, but the width thereof is smaller than the entire width of the red-hot part 9. The amount may be small and will not adversely affect the radiant heat dissipation area or the visible red-hot area.

In this way, by forming the linear combustion chamber 7, it is possible to exhibit desirable combustion performance without causing abnormal combustion due to the inflow of unnecessary air on both sides of the red-hot part 9, and to maintain the red-hot part 9 at a sufficiently high temperature and uniformly. This makes it possible to maintain not only a visual heating effect but also a large amount of substantial radiant heat dissipation.

Note that here, the window 1o provided opposite the red-hot part 9 is
If the width is set to be approximately the same as the width of the central portion 9& separated by the ribs) 90, only the uniformly red-hot central portion 9& can be seen through without exposing the side portions 9b, which are inferior in red-hot brightness. , which can be visually and practically preferable. Further, the heat insulating effect can be sufficiently exhibited by providing the sleeve 90 only in the middle upper part of the red-hot part 9, but it is easier to process it if the central part 9& and both side parts 9b are made of separate members as in this embodiment. be. Furthermore, it is preferable that the overall width of the combustion chamber 7 is slightly larger than the overall length of the lamp wick 1 when the lamp wick 1 is moved up and down. This makes it easy to obtain an appropriate correlation between the amount of fuel vaporized and the distribution of air in the red-hot section 9, making it possible to achieve a more complete combustion state.

Effects of the Invention As described above, the present invention provides a structure in which both sides of the incandescent part, which is provided at the upper part of the flat part of one side of a flat combustion chamber and which has a large opening ratio, have a smaller opening ratio than the central part, and By separating at least the middle and upper parts, it is possible to ensure complete combustion in the entire area within the combustion chamber, and further maintain a uniform red-hot state by increasing the temperature of the red-hot part.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of an oil combustor according to an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view thereof. 1... Lamp wick, 7... Combustion chamber, 9...
...Red-hot part, 9a...Central part, 9b...
...Both sides, ec...slib. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
--Corrosion 9b--Ichiryo Ichi 11 section 9c---Swat

Claims (3)

[Claims] (1) It has a horizontally long flat combustion chamber made of a perforated plate with the tip of a flat lamp wick exposed at the lower end, and an outer cylinder surrounding the combustion chamber, and an upper part of the flat part of one side of the combustion chamber. a red-hot part having a larger aperture ratio than the central part, a window provided with a heat ray transmitter is provided in the outer cylinder facing the red-hot part, and both ends of the red-hot part have an aperture ratio lower than that of the central part; and an oil combustor in which at least the middle and upper portions between the center and both ends are separated. (2) The oil combustor according to claim 1, wherein the width of the window is approximately the same width as the central portion of the red-hot section where the aperture ratio is large. (3) The oil combustor according to claim 1 or 2, wherein the central width of the red-hot section is approximately the same width as the entire length of the lamp wick.