JPH02183705A - Burner - Google Patents

Abstract

PURPOSE:To improve the easiness of assembly, prevent the deterioration in the combustion performance and make wider the adjustment range of combustion quantity by providing a projecting section facing upwards for positioning on the projection face of the connecting shaft of a flow straightening cylinder and flow straightening plate. CONSTITUTION:A projecting section 23a facing upwards for positioning is provided at the flange section 23 at the lowest section of a flow straightening cylinder 21 and a projecting section 25a for positioning also at the outer circumferential section of a flow straightening plate 25. In the assembly an outer cylinder 9, outer flame cylinder 7, inner flame cylinder 6 and the flow straightening cylinder are put into one body by a connecting shaft 10 in order to hold a burner. The projecting section 25a is provided on the flow straightening plate 25, and since it is fit into and connected to the projecting section 23a of the flow straightening cylinder which lies in the vertical projection face of the hole 21a of the flow straightening cylinder 21a, the connecting shaft 10 goes smoothly through the hole 21a of the flow straightening cylinder and the easiness of assembly is much improved when the connecting shaft is passed through with the shaft matched to the position of the projecting section of the flow straightening plate 25. Further, the run-out of the shaft can be prevented and it is possible to constitute the gap C between an inner flame cylinder and the flow straightening plate 25 with the minimum dimension uniformly over the whole area by fitting the projecting section 23a of the flow straightening cylinder to the projecting section 25a of the flow straightening plate, and it is possible to keep unburned gas from flowing into an air introduction route 24 and prevent the deterioration of the exhaust gas characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device used for household heating and the like.

2. Description of the Related Art Conventionally, this type of combustion device includes a wick-type combustion device used in kerosene stoves and the like. This wick-type combustion device does not require a 100cm power source and has the advantage of being easily portable, but on the other hand, when the combustion amount is reduced a little, a large amount of CO begins to be generated, and there is a problem that the combustion amount Uj4 node width is narrow.

As a solution to this problem, a combustion device as shown in FIG. 4, which allows a wide combustion tUEJ node width, has already been proposed.

This combustion apparatus will now be described. In FIG. 4, reference numeral 1 denotes a lamp wick, which is set between an inner wick tube 2 and an outer wick tube 3 so as to be vertically movable.

The upper end portions of the inner core cylinder 2 and the outer core cylinder 3 each have an inner fire pan 4,
It forms an outer fire pan 5, 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 within a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where combustion is vaporized. 9 is an outer cylinder, an inner flame cylinder 6, an outer flame cylinder 7,
The outer cylinders 9 are arranged substantially concentrically from the inside and are integrated by a connecting shaft 10. Reference numeral 11 denotes a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. Reference numeral 12 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube 6. 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. 1
A top frame 9 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. 21 is the inner flame tube 6
It is a flow control tube held inward by a connecting shaft 10, has a flow control tube hole 21a through which the connecting shaft 10 passes, and extends upward from near the position facing the tip of the lamp wick l to near the tip of the inner flame tube 6. , and a flange portion 23 located at the bottom of the control area 22 formed between the inner flame cylinders 6 is provided. 24 is an air introduction path; 25
is a rectifying plate that is joined to the flange and is used to rectify the air flowing into the air introduction passage 24 and lower the temperature of the inner cooking pan 4. Reference numeral 26 denotes a ventilation hole provided in the middle lower wall surface of the flow control tube 21 . Reference numeral 27 denotes a flange portion that divides the restriction area 22 into a royal area 28 and a royal area 29 directly above the ventilation hole 26, and is formed by applying beading, flaring, etc. to make the flow restriction tube 21 protrude toward the outer circumference. are doing. Reference numeral 30 denotes a ventilation section that is set to have a constant interval between the flow control tube 21 and the inner flame tube top plate 12.

In the above configuration, when the lamp wick l is ignited, combustion starts, and the high temperature combustion gas due to combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion is supplied to the air holes of the inner flame tube 6 and the outer flame tube 7. 11 and into the combustion chamber 8 through the through hole 17 of the red-hot part 16 to continue combustion. At this time, the air supplied from inside the inner flame tube 6 is divided into air supplied from below the flow control tube 21 to the vicinity of the lamp wick 1, and air flowing upward through the air introduction path 24. A portion of the rising air passes through the vent 26 and is supplied to the combustion chamber 8. Furthermore, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and above from the air hole 11 and the ventilation hole 13. Also, some
It descends into the royal region 31 and is also supplied to the combustion chamber 8 from the relatively lower air holes 11 . - The energized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, because the pressure in the royal area 28 and the royal area 29 becomes negative, a part of the mixed gas flows into the royal area 28 and the royal area 29. Therefore, the monarch basin 28 and the monarch basin 29 are filled with unburned gas. This unburnt gas is mixed with the air flow in the vent hole 26 and the vent section 30, and is again supplied to the combustion chamber. Therefore, during strong twist firing, unburned gas and air are supplied from near the upper end of the inner flame tube 6 to the upper end of the combustion chamber 8 in a well-mixed state, resulting in efficient combustion near area A, and furthermore, the unburned gas and air are not completely burned here. Unburnt gas is combusted by a flame that forms upwards. Next, as the exposed height of the wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8 (the flow in this case is the same as that during hard-twist firing, but
Since the amount of vaporized gas is greatly reduced, the amount of unburned gas flowing into the monarchy basin 29 is also reduced. Therefore, the vicinity of area B becomes a good mixing area, and flame holding is formed in this area, and the inner flame tube 6
The wall becomes red hot, and the flame that forms above it completes the combustion. In this case, most of the unburned gas that has flowed into the monarch basin 29 is supplied into the combustion chamber 8 and is combusted with air, so the monarch basin 29 facing above the flame
In this case, there is almost no unburned gas component, and the air discharged from the air holes 11 and 13 above the flame is clean, and the exhaust gas characteristics (Co/C08) do not deteriorate, so it is possible to reduce the combustion amount to a considerably low level. It becomes wide during the combustion amount adjustment.

Problems to be Solved by the Invention However, with the above configuration, the combustion amount is increased and the usability is greatly improved, but the ease of assembly is deteriorated. In other words, the pressure region 28 becomes negative and is filled with unburned gas, but in order to prevent this unburned gas from flowing into the flow control tube 21 and flowing out with incomplete combustion,
The gap between the flow regulating plate 25 below the flow control tube 21 and the inner flame tube 6 must be made as small as possible. However, in such a case, when attempting to pass the connecting shaft IO through the flow control tube hole 21a during assembly, this becomes a blind spot of the flow regulating plate 25 when the combustion device is reversed and viewed from below, making the assembly very difficult. It was becoming difficult.

Also, when joining the flow regulating plate 25 to the flow control tube 21, it is necessary to do so so that the gap between the inner flame tube 6 and the flow regulating plate 25 is uniform, otherwise the exhaust gas characteristics (Co/C0x) as described above will be poor. However, there were problems in that it was difficult to assemble, as it was difficult to obtain a symmetrical structure and required careful assembly.

The present invention solves such conventional problems, and provides a large combustion device that is easy to assemble, prevents deterioration of combustion performance caused by poor assembly, and is safe, comfortable, and has a large combustion capacity while adjusting the amount of combustion. The purpose is to

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention is provided with an upward convex portion for positioning on the projection plane of the connection axis of the flow restrictor and the current plate.

According to the above-described structure, the present invention can be quickly assembled by passing the connecting shaft using the convex portion on the projection plane of the connecting shaft as a mark. In addition, by fitting and aligning the convex portions of the flow control tube and the current plate, the deterioration of fuel pressure combustibility caused by uneven gaps between the flow control plate and the inner flame tube due to the misalignment of the flow control plate can be prevented. It can also be prevented.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 3. The same parts as those in FIG. 4 already explained will be given the same reference numerals and the explanation will be omitted, and only the different parts will be explained.

FIG. 1 is a cross-sectional view of one embodiment of the present invention, in which a flow control tube 21
An upward protrusion 23a for positioning is provided on the flange 23 at the bottom of the
An upward convex portion 25a for positioning is also provided on the outer periphery of the rectifying plate 25. As can be seen from the enlarged view of the main part in FIG. 2, the flow restrictor convex portion 23a and the current plate convex portion 25a are designed to fit together when they are joined. Furthermore, in the vertical direction shown in FIG. 3, these convex portions 23a
, 25a are provided so as to be located below and opposite to the connecting shaft 10.

In the above configuration, firstly, when assembling it, in order to hold the combustion device, the connecting shaft 10 must be connected to the outer cylinder 9.
, the outer flame tube 7, the inner flame tube 6, and the flow control tube 21 must be integrated, in which case the combustion device must be reversed and the hole in the outer tube 9,
The connecting shaft 10 is sequentially passed through the hole in the outer flame tube (not shown), the hole in the inner flame tube (not shown), and the hole 21a in the flow control tube. However, there is a flange 23 below the flow control tube 21. , because the current plate 25 is joined thereto, the position of the flow control tube hole 21a cannot be determined.

On the other hand, the current plate 25 is provided with a convex portion 25a, which is fitted and joined to the convex portion 23a of the flow restrictor tube located on the vertical projection plane of the flow restrictor tube hole 21a, so that the convex portion 25a of the current plate 25a is If the connecting shaft 10 is passed through at the same time, the connecting shaft 10 will smoothly pass through the flow control tube hole 21a. Therefore, ease of assembly is greatly improved.

In addition, from the viewpoint of combustion performance, the royal flow area 28 and the royal flow area 29 have negative pressure, so a part of the mixed gas flows into them, and they are filled with unburned gas. When this unburned gas flows into the air introduction passage 24 inside the flow control tube 21, it is not supplied into the combustion chamber 8 and is discharged outside the combustion device as unburned gas, so that the exhaust gas characteristics (Co/Co Therefore, it is desirable that the gap C between the inner flame tube 6 and the baffle plate 25 be as small as possible to prevent unburned gas from flowing into the air introduction passage 24. However, during assembly, the flow control tube 21 is not connected properly. Since it is held by a shaft, a minimum gap C is required during assembly.Therefore, in order to make this gap C as small as possible, it is necessary to
When joining the rectifying plate 25 to the current plate 25, it is important to do so so as not to cause misalignment. Therefore, by fitting the flow control cylinder convex part 23a with the current plate convex part 25a, the runout is eliminated and it becomes possible to configure the gap C between the inner flame cylinder 6 and the current plate 25 uniformly over the entire area with the minimum dimension. , unburned gas flows into the air introduction passage 24, and deterioration of exhaust gas characteristics can be prevented.

The case where a convex portion is provided for positioning has been described above, but various other methods can be considered for positioning. However, since the dimensions of the flange portion 23 are not very large, it is most desirable to provide an upward convex portion in consideration of workability.

Further, since the connecting shafts 10 intersect vertically in steps, it is desirable to provide two convex portions 180 degrees opposite each other.

Effects of the Invention As described above, according to the combustion device of the present invention, the connecting shaft can be smoothly inserted into the hole of the flow control tube that is a blind spot using the convex portion as a mark during assembly, so that the ease of assembly is improved. greatly improved. In addition, the position of the flow regulating tube and the current plate is regulated by the convex part, so that they can be joined without any vibration, so the gap between the inner flame tube and the current plate can be minimized during assembly, and unburned gas can be removed. It is possible to prevent the air from flowing into the air introduction passage inside the restriction cylinder and flowing out of the combustion device without being combusted, deteriorating the exhaust gas characteristics (CO/Cot), and allows for a wide combustion device while adjusting the combustion amount. It is possible to provide a combustion device with excellent combustion performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a combustion device in an embodiment of the present invention;
FIG. 2 is a sectional view of the main parts, FIG. 3 is an assembled view of the combustion device seen from the bottom, and FIG. 4 is a sectional view of a conventional combustion device. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame cylinder, 9...Outer cylinder, IO...
Connection shaft, 18... Transmission tube, 21... Control tube, 22... Control area, 23... Flange, 25...・Rectifier plate, 23a * 25a・
...Positioning section. Name of agent Patent attorney Shigetaka Awano 1 person I...- Q-Q-- Li-- 1-m= n' Fugai outside the association Jurisdiction I! 1 Henbetsu 25-Ichime 91

Claims (1)

[Claims] an outer flame tube consisting of a pore section having a large number of air holes and a red-hot section formed above the pore section; and a flame tube disposed inside the outer flame tube.
an inner flame cylinder having a large number of air holes, an outer cylinder located on the outer side of the outer flame, a connecting shaft passing through the outer cylinder, the outer flame cylinder, and the inner flame cylinder, and a connecting shaft placed above the outer cylinder. a lamp wick that is movable up and down at the lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder, and a lamp wick that is located inside the inner flame cylinder in the vicinity of a position opposite to the lamp wick. extending from to near the upper end of the inner flame cylinder,
A flow control tube having a flange that substantially shields a control area formed between the inner flame tube and the flow control tube at a bottom surface, and a flow regulating plate having an opening joined to the flow control tube, and the flow control tube A combustion device comprising a positioning portion provided on a projection plane of the connection axis of the cylinder and the current plate.