JPH01139909A - combustion device - Google Patents

Abstract

PURPOSE:To prevent the excessive flare-up and odor at the time when a burning rate varies rapidly from low to high by providing an inner flame cylinder with densely arranged air holes at its upper end, and disposing at least one large diameter air hole among the densely arranged air holes. CONSTITUTION:An inner flame cylinder 6 is provided with densely arranged air holes 33 at its upper end, and at least one large diameter air hole 34 among the densely arranged air holes 33. When the burning rate is rapidly adjusted from low to high, a large amount of air for a large amount of fuel vapor is supplied from an air conduit 32 to the upper part of a combustion chamber 8 through the densely arranged air holes 33 so as to avoid the excessive flare-up. Therefore, even if the burning intensity is adjusted in a wide range, safety and comfort are ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

2. Description of the Related Art Conventionally, as this type of combustion device, there is a wick-type combustion device used in kerosene stoves and the like. This wick-type combustion device does not require a 100V source like oil fan heaters, etc., meaning it does not require a power cord, so it has the advantage of being easily portable, but if you reduce the amount of combustion a little, CO
There was a time when the country was opening up, where a lot of fuel began to occur and the combustion amount adjustment period was narrow.

As a solution to this problem, a combustion device as shown in FIG. 2, which can be used widely during combustion amount adjustment, has already been proposed. This combustion apparatus will be described below. In FIG. 2, reference numeral 1 denotes a wick which is a fuel supply section, and is set between an inner wick tube 2 and an outer wick tube 3 so as to be vertically movable. The upper ends of the inner core tube 2 and the outer core tube 3 form an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame tube 6 and an outer flame tube 7 are placed. During combustion, the tip of the wick 1 is exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where combustion is vaporized. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are sequentially arranged approximately concentrically from the inside and are integrated by a fixing pin 10. Reference numeral 11 indicates a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7.

12 is an inner flame tube top plate that closes the upper end opening of the inner flame tube 6;
The inner flame tube 6 has a ventilation hole 13 that communicates from the inside to the upper side. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube.

A constriction part 15 is formed at the upper end of the outer cylinder 9, and a glowing part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a through hole 17 with a large opening is provided. Reference numeral 18 denotes a transparent tube made of a transparent material such as glass, and is placed on the outer tube 9. A top frame 19 is placed on the upper end of the red-hot part 16 so as to cover the upper end of the air passage 20 between the red-hot part 16 and the transmission cylinder 18, and fixes the transmission cylinder 18. 2
Reference numeral 1 denotes a flow control tube installed inside the inner flame tube 6, which extends upward from near the position facing the tip of the wick 1 to near the tip of the inner flame tube 6, and has a control area 22 formed between the inner flame tubes 6. It is provided so that it has a bottom surface. 23 is an air introduction path. 2
Reference numeral 4 denotes a combustion control tube, which is set at the upper part of the inner side of the outer flame tube air hole portion 25, and whose upper end extends to the vicinity of a position facing the throttle portion 15 of the outer cylinder 9, and an air chamber 26 is formed between it and the air hole portion 25. ing. Reference numeral 27 denotes communication holes provided in the wall surface of the combustion control tube 24, which are uniformly provided in large numbers so as to communicate the air chamber 26 and the combustion chamber 8. Reference numeral 28 denotes a vent hole provided in the middle lower wall surface of the flow control tube 21 .

Reference numeral 29 denotes a flange portion that divides the control area 22 into a monarch area 30 and a monarch area 31 directly above the ventilation hole 28, and the flow control cylinder 21° is made to protrude toward the outer circumference by applying beep, ing, flaring, etc. It is formed by 32 is the flow control tube 21
This is a ventilation section that is set to have a constant interval between the inner flame tube top plate 12 and the inner flame tube top plate 12.

With this configuration, inside the inner flame tube 6, ■Separation of the air flow and diffused unburned gas by the restriction tube ■Prevention of diffusion of unburned gas inside the restriction tube ■Air supplied from the upper part of the restriction tube Re-burning of unburned gas In addition, in the air passage 20, ■ Preventing the diffusion of unburned gas by the side flow action of the combustion control cylinder ■ Accelerating the combustion of unburned gas by the air ejected from the upper pant of the air chamber 26. It was possible to significantly improve the Co/CO2 properties. Therefore, the amount of combustion can be reduced to a considerably low level, and the range of adjustment of the amount of combustion can be greatly expanded.

Further, even at the time of ignition, air is efficiently supplied to the lower part of the combustion chamber 8 from the communication hole 27 and the ventilation hole 28, so that combustion is quickly promoted and the generation of copper and odor is reduced. Also,
A similar effect can be obtained when burning for a long time in a well-sealed room. That is, under oxygen-deficient conditions, the amount of combustion decreases as the oxygen temperature decreases, and a phenomenon similar to that observed when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion is observed. Since air is supplied to the combustion chamber 8 through the vent hole 28, combustion is promoted there and oxygen deficiency characteristics are also improved.

Problems to be Solved by the Invention Although the above configuration has made it possible to considerably reduce the amount of combustion, the following problems arise. That is, when the wick 1 is lowered to reduce the amount of combustion, the amount of fuel vaporized decreases, so the air ratio in the combustion chamber θ increases compared to when strong combustion occurs.

Therefore, the combustion position moves downward, and the inner flame tube 6 and the stoma part 2
A flame is formed in the relatively lower air hole 11 of the lamp wick 1.
The temperature in the vicinity increases. In this state, if the height of the wick 1 is suddenly raised to the height of steady strong twist firing, the amount of vaporization will be higher than that of steady strong twist firing, and the air volume will not be able to keep up with the temperature at the top of the combustion tube. In some cases, an even larger flame was generated, giving a sense of danger, or the flame could not be maintained, resulting in a lift flame and a foul odor.

The present invention solves the above-mentioned problems. By suppressing excessive flame elongation and generation of bad odor when switching suddenly from weak combustion to strong twist firing, combustion characteristics are good and combustion is improved. The five objectives are to provide a safe and comfortable combustion device with a wide range of volume adjustment and without any practical problems.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention is provided with dense air holes in the upper part of the inner flame cylinder, and at least one part of the dense air holes has a diameter larger than the other part. It has large air holes.

Effect: With the above-described configuration, the present invention can send a large amount of air from the upper part of the inner flame cylinder in response to a large amount of vaporized air during a sudden switch from weak combustion to strong twist firing. Furthermore, a large amount of air can be sent locally through the large air holes.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. Parts that are the same as those in FIG.
A dense air hole 3a is provided at the upper end of the inner flame cylinder 6, and a large air hole a4 is provided at at least one location of the dense air hole 33.

In the above configuration, steady combustion is carried out in the same manner as that in FIG. A large amount of air is sent from 32 to the upper part of the combustion chamber 8 to prevent excessive flame formation. This dense air hole 33 alone is effective against excessive flame formation. However, during weak combustion, the temperature is quite low because no flame is formed at the upper end of the inner flame cylinder, and an excessive amount of fuel is vaporized.
The dense air holes 33 in the upper part of the inner flame tube 6 are in a state where it is difficult to form a flame, and the flame may not be able to form, resulting in a lift flame and a bad odor. The large air hole 34 prevents this. That is, by locally supplying a large amount of air from the large air hole 34, the flame holding power of the large air hole 34 is increased, and when switching from weak combustion to strong twist firing, the large air hole 3
A flame is instantaneously formed at point 4, and from that point as a starting point, the flame is formed in the entire circumferential direction. This prevents lift flames.

In addition, it is better to have multiple large air holes 34 in order to prevent lift flames, but if there are too many, the secondary flame during steady combustion may become yellow, or the red-hot temperature of the red-hot part 16 may decrease. Uniformity may deteriorate and problems may arise in terms of appearance. −
Although it is effective even in a few places, if it is placed in several places (for example, 2 to 4 places uniformly around the circumference) without affecting steady combustion,
Even greater effects can be obtained.

In addition, in this embodiment, the dense air holes 3a are provided at the upper end of the inner flame tube 6, so during steady strong twist firing, the dense air holes 3a
Since the flame is strongly held and the red glow brightness is improved, the appearance also improves.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, the extension of the flame is reduced during the sudden switch from weak combustion to strong twist firing, and lift flame is suppressed to prevent bad odors. Therefore, even if the combustion amount adjustment range is widened, a safe and practically comfortable combustion device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a combustion device showing a conventional example. 1...Fuel supply section, 6...Inner flame tube, 7
...Outer flame tube, 8... Combustion chamber, 9...
... Outer cylinder, 11 ... Air hole, 18 ...
・Transmission tube, 33... Dense air holes, 34...
・Large air hole. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
--sP+Yurei Iku 5s---aJl Rodoki i Otsu

Claims (1)

[Claims] an outer flame tube having a large number of air holes, an inner flame tube having a large number of air holes arranged inside the outer flame tube, an outer flame tube located outside the outer flame tube, and the outer flame tube. A transmission tube placed above, a fuel supply section set at a lower end of a combustion chamber formed between the outer flame tube and the inner flame tube, and dense air holes at the upper end of the inner flame tube. A combustion device in which a large air hole is formed in at least one of the dense air holes.