JPS63267808A - Liquid fuel burning equipment - Google Patents

Abstract

PURPOSE:To prevent the deterioration of combustion characteristic by installing a guide cylinder sheltering a gap part at its lower part extended from the upper part in the inside of an inner flame cylinder to the lower location and formed between the inner flame cylinder and the guide cylinder body. CONSTITUTION:When a control lever 46 is pressed down on the operation side, a control cylinder 34 constituting a guide cylinder 51 rises to form a gap between the central opening 18 of a wick guide cap 16 and the lower part of the cylinder 34. Air sucked from a suction part 19 is forced to flow into a gap B between an inner flame cylinder 21 and the guide cylinder body 51 from the opening 18 of the cap 16 and passes through the air holes 36 of the cylinder 34 and the air holes 33 of a guide plate 30 located at the upper part of a control inner cylinder 29 and then is supplied into a combustion chamber A between the cylinder 21 and an outer flame cylinder 22 from the whole air holes 26 of the cylinder 21, resulting in burning. As a result, even if a part of mixed gas in the chamber A flows into the cylinder 21 through the holes 26 of the cylinder 21, the gas flows into the gap B and rises and flows again into the chamber A near the upper part of the gap and is burnt and the characteristic of exhaust gas is therefore improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a liquid fuel combustion device used as a household oil stove or the like.

(Prior Art) Conventionally, liquid fuel combustion devices used as kerosene stoves etc. have an inner flame tube and an outer flame tube placed on a fire pan, and the inner flame tube and outer flame tube are connected to each other. The tip of the wick protrudes from the lower part of the combustion chamber formed between the wicks, and the fuel vaporized from the wick and the combustion air supplied into the combustion chamber from the numerous vent holes in the inner flame tube and the outer flame tube. They are mixed and combusted, making the red-hot part of the outer flame tube red-hot to obtain radiant heat.

(Problems to be Solved by the Invention) In the above-mentioned device, in normal strong combustion, a flame is formed in the upper part between the inner flame tube and the outer flame tube, and unburned components that have risen inside the combustion chamber It shows good combustion characteristics because it burns completely. However, in order to lower the firepower during weak combustion, if the amount of combustion is reduced by reducing the amount of protrusion of the wick into the fire pan, the combustion position, that is, the flame position, will be lowered, compared to the case of strong twist firing in which the wick is raised to a predetermined position. Generates large amounts of carbon monoxide gas in exhaust gas. In other words, combustion air rises inside the inner flame tube and between the outer flame tube and the outer flame tube, and is supplied into the combustion chamber through the numerous vent holes in the inner flame tube and the outer flame tube, but it is not fully supplied. Part of the gas in the combustion state leaks from the combustion chamber to the inside of the inner flame tube and to the outside of the outer flame tube.

At this time, the gas on the outside side of the outer flame tube usually tends to re-flow into the deep combustion chamber where the opening ratio of the vent hole in the red-hot part is relatively large. However, since the vent holes in the inner flame tube are usually relatively small and have a large resistance, it is difficult for CO to re-enter the combustion chamber, and during weak combustion when the flame is descending, a high concentration of CO leaks into the inner flame tube. Exhaust gas is emitted directly into the atmosphere from the top of the inner flame tube, deteriorating combustion characteristics.

The present invention particularly prevents deterioration of combustion characteristics during weak combustion,
The object of the present invention is to provide a liquid fuel combustion device with good combustion characteristics.

[Structure of the invention]

(Means for Solving the Problems) The liquid fuel combustion device of the present invention includes an inner flame tube having a large number of ventilation holes, and an outer flame tube disposed outside the inner flame tube and having a large number of ventilation holes. and an outer cylinder disposed outside of this outer flame cylinder,
A fuel supply section provided at the lower part of the combustion chamber formed between the inner flame tube and the outer flame tube, and a fuel supply section provided inside the inner flame tube and from near a position facing the fuel supply section. The guide cylinder extends to a position below the upper end of the inner flame cylinder and has a lower part thereof that covers a gap formed between the guide cylinder and the inner flame cylinder.

In addition to the above configuration, the second aspect of the present invention is to substantially seal the upper part of the gap formed between the inner flame cylinder and the guide cylinder.

(Function) In the present invention, even if a part of the mixed gas in the combustion chamber A enters the inner flame cylinder from the vent hole of the inner flame cylinder during combustion, this unburned gas is transferred between the inner flame cylinder and the guide cylinder. It flows into the gap B between the two, rises, and re-enters the combustion chamber A near the upper end of the gap B, where it is burned by fire. Therefore, there are almost no unburned gas components inside the inner flame tube, and the air discharged from the upper part of the inner flame tube is clean and has good exhaust gas characteristics.

Further, in the second invention, the gap 1 between the inner flame cylinder and the guide cylinder body is
11! By connecting the lower part of the IB and closing the upper part, unburned gas and clean air flow are reliably separated,
It is possible to reliably prevent unburned gas from flowing to the upper part of the inner flame cylinder.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In Figure 1, 1 is a fuel tank, and a support piece 3 is placed on a stand 2.
The inside of the core guide n4 is integrally provided with an open top and bottom, and this core guide inside 1i14
A lamp wick 5 is fitted on the outer periphery of the fuel tank 1 so as to be movable up and down and detachable from the fuel tank 1 . This lamp wick 5 is fitted and supported in a cylindrical wick holder 6, and this wick holder
Rack teeth 7 are formed in the vertical direction on the outer periphery of the fuel tank 6, and a rotating shaft 9 provided with a gear 8 that meshes with the rack teeth 7 is rotatably supported by a bearing 1o attached to the fuel tank 1. A knob 11 is attached to the protruding end of the bearing 9 from the bearing 10.

A burner basket 12 is removably attached to the upper part of the fuel tank 1 with screws or the like, and the burner basket 12 includes a wick guide outer cylinder that fits on the outside of the wick 5 that is fitted into the wick guide inner cylinder 4. 13 is provided, and a grate ring 14 is integrally provided at the top of this core guide outer cylinder 13 by means of, for example, adding.

Further, an annular core guide cap 16 having a receiving step 15 formed on the outer peripheral edge is integrally attached to the upper end of the core guide inner cylinder 4 by caulking or the like.
The grate ring 14 forms a grate portion 17 from which the upper end of the lamp wick 5 is retracted.

A central opening 18 is formed in the core guide cap 16 and communicates with a combustion air suction portion 19 opened at the lower end of the inside of the core guide inner cylinder 4 .

Reference numeral 20 denotes a combustion tube, which is connected to the receiving part 1 of the wick guide cap 16.
5, an outer flame tube 22 that is disposed with a gap on the outside of the inner flame tube 21 and supported by the fire pan ring 14; The inner flame tube 21, the outer flame tube 22, and the outer tube 23 are integrally connected by intersecting connecting pins 24, 25. Moreover, the inner flame cylinder 21
The outer flame tube 22 has a large number of ventilation holes 26a and 26b.
is formed. Also, the connecting bins 24 and 25 are located outside the combustion tube 20! ! 123 to outer flame lI22, inner flame tube 2
1 and intersect at the center of the inner flame tube 21, and a nut 28 is screwed into and fixed to a tip threaded portion 27 protruding from the outer tube 23. The upper end of the lamp wick 5 serving as the fuel supply section faces the lower part of the combustion chamber A formed between the inner flame tube 21 and the outer flame tube 22.

Reference numeral 51 denotes a guide solid body, and this guide cylinder body 51 is made up of an inner adjustment station 29 and an adjustment cylinder 34, as shown in FIG. The adjustment inner cylinder 29 is located within the inner flame cylinder 21 and is disposed approximately at the middle of the inner flame cylinder 21 in the height direction. A support hole 32 having a diameter larger than the outer diameter of the connecting bottle 24, 25 is formed, and the connecting bottle 24, 25 is inserted through this support hole 32 and supported. Also, the above ¥; a1! i A guide plate 30 is disposed at the upper opening of the inner cylinder 29, and this guide plate 30
The annular mounting edge 31 formed on the periphery of the inner flame tube 21
There is a small gap between the mounting edge 31 and the adjustment inner cylinder 29. The adjustment inner cylinder 29 is swingably supported by the M-joint pins 24 and 25 passed through the support hole 32 by the distance between the mounting edge 31 of the guide plate 30 and the V4 node inner cylinder 29.

In addition, a large number of ventilation holes 33 are formed in the guide plate 30 at a portion corresponding to the inner side of the adjustment inner cylinder 23, and the inner flame cylinder 21 and the adjustment inner cylinder 29 are formed at the edge of the guide plate 30. A blockage part 3 without a ventilation hole above the gap B part between
0a is formed.

The adjustment tube 34 has almost the same height as the adjustment inner tube 29, and is fitted to the inside or outside of the adjustment inner tube 29 so as to be able to rise and fall. A lower diameter-reduced portion 37 is formed, and a ventilation hole 36 is formed in the bottom surface 35 of the adjustment W 134, and a plurality of protrusions 37a such as beads are formed on the outer surface of the lower diameter-reduced portion 37. It is formed.

When the adjusting cylinder 34 is lowered to its lowest position, the lower diameter reducing portion 3
7 is fitted into and abutted on the center opening 18 of the lead guide cap 1G via each protrusion 37a, and the bottom surface 35 is positioned within the lead guide cap 16. In this state, the contact portion 34a of the upper edge of the lower diameter reducing portion 37 of the adjusting tube 34 contacts the inner surface of the inner flame tube 21, and the lower diameter reducing portion 37 of the adjusting tube 34 is caused by the protrusion 37a below. A gap is created between the portion 37 and the wick guide cap 16, and a small amount of air from the wick guide inner cylinder 4 is constantly supplied to the lower inner surface of the inner flame cylinder 21. That is, the guide cylinder body 51 consisting of the adjustment inward direction 29 and the adjustment cylinder 34 is disposed inward of the inner flame cylinder 21 as a whole, and the guide cylinder body 51 is arranged inside the inner flame cylinder 21 as a whole, and extends from the vicinity of the position facing the lamp wick 5, which is the fuel supply part, to the inner flame cylinder 21. The gap B extending almost to the middle part and formed between the inner flame tube 21 is shielded by the abutting part 34a at the lower part, and is almost sealed by the closing part 30a of the guide plate 30 at the upper part.

Inside the core guide! ! An adjustment rod 38 having a rectangular cross section is supported by a support fitting 40 at the center of the inner side of the rod 54, and is movable up and down.
A screw 42 inserted through a support hole 41 at the center of the bottom surface of the adjustment cylinder 34 is screwed into a screw hole 39 at the upper end of the adjustment rod 38 .

Also, an operating mechanism 43 that raises and lowers the adjustment rod 38
, is a long groove 45 formed at the tip of a square-shaped adjustment lever 46 in a pin 44 protruding from the lower end side of the adjustment rod 38.
The adjustment lever 46 is rotatably supported by a support shaft 50 on a support plate 47 provided on the stand 2, and a stop pin 48 is provided at the tip end of the adjustment lever 46 on the operation side.
is provided, and this stop pin 48 is engaged with an arcuate resistance hole 49 formed in the shaft support plate 47.

Next, the operation of this embodiment will be explained.

During combustion operation, the rotary shaft 9 is rotated by operating the knob 11, and the gear 8 of this rotation I49 engages with the rack teeth 7 of the wick holder 6, causing the wick 5 to rise together with the wick holder 6, and the combustion tube 20 The upper side of the wick 5 is made to protrude into the fire pan 17 so as to face the combustion chamber A between the inner flame tube 21 and the outer flame tube 22. Then, the lamp wick 5 is ignited by an ignition device (not shown) and burned.

The high-temperature combustion gas from this combustion rises into the combustion chamber, creating a thermal draft, and the air necessary for combustion is supplied into the combustion chamber A from the vents 26a and 26b of the inner flame tube 21 and the outer flame tube 22. , combustion continues.

In the case of hard twist firing, when the operating side of the adjustment lever 46 is pressed down, the :I cylinder rod 38 is pushed up, and the adjustment cylinder 34 moves up inside the adjustment inner cylinder 29, causing the adjustment cylinder 34 to move upward. The lower end is approximately at the same height as the lower end of the adjustment inner cylinder 29, and a large gap is created between the center opening 18 of the lead guide cap 16 and the lower end of the adjustment cylinder 34. The air sucked from the suction part 19 at the lower end of the core guide inner cylinder 4 is then transferred to the core guide cap 16.
It flows into the lower inner side of the inner flame tube 21, that is, the gap B, from the central opening 18 of the inner flame tube 21, and passes through the ventilation hole 36 of the adjustment tube 34 and the ventilation hole 33 of the guide plate 30 at the upper part of the adjustment inner tube 29. is supplied to the upper part of the inner flame cylinder 21, and all ventilation holes 26 of the inner flame cylinder 21
It is almost evenly supplied to the combustion chamber between the inner flame tube 21 and the outer flame tube 22, resulting in strong twist firing.

In addition, for weak combustion, the wick 5 of the fire pan 17
When the operating side of the adjustment lever 46 is pushed up without changing the protrusion height of the adjustment lever 46, the adjustment rod 38 is pulled down, the adjustment cylinder 34 is lowered, and at its lowermost position, the lower diameter reduced portion 37
is placed on the core guide cap 1G via the protrusion 37a, and the contact portion 34a abuts against the inner surface of the inner flame tube 21 above it.

Therefore, air is supplied to the lower part of the inner flame tube 21 near the lamp wick 5 only from the gap formed by the protrusion 37a between the lower diameter reduced part 37 and the wick guide cap 16, and the inner flame tube 21 The supply of combustion air from the lower part is suppressed, and most of the air supplied from the center opening 18 of the core guide cap 1G is passed through the ventilation hole 36 of the lft joint cylinder 34 and the guide plate 30 at the upper part of the WAA inner cylinder 29. It is supplied to the upper part of the inner flame tube 21 through the air hole 33. For this reason, more combustion air is absorbed into the inner flame than during strong twist firing. Since the air mainly flows in from a high position of i21, the draft to the combustion part is weakened, the amount of air supplied near the wick 5 is also drastically reduced, and the amount of vaporized gas to be combusted is also reduced. Therefore, even if the protruding height of the lamp wick 5 is kept constant, a weak combustion condition with a good balance between the amount of air and the vaporized gas can be obtained, and a large amount of -m carbon gas will not be generated.

Further, during the above combustion, a part of the mixed gas in the combustion chamber A flows into the gap B between the inner flame tube 21 and the guide tube body 51 from the vent hole 26a of the inner flame tube 21 and rises. , this unburned gas re-enters the combustion chamber A near the upper end of the Fl gap B, where it is combusted by a flame.

Particularly during weak combustion, since the gap 1ljiB is closed between the lower part and the upper part, unburned gas does not flow out to the upper part of the inner flame cylinder 21. Therefore, there are almost no unburned gas components inside the inner flame tube 21, and the air discharged from the vent hole 26a at the upper part of the inner flame tube 21 is clean and has good exhaust gas characteristics.

Furthermore, when the adjustment tube 34 is lowered, the adjustment inner tube 29 is swingably supported by the connecting pin 24.25, so that the 1 m gap between the mounting edge 31 of the guide plate 30 and the adjustment inner tube 29 is Since the adjustment inner cylinder 29 is swung, the adjustment cylinder 34 is moved up and down while maintaining surface contact with the adjustment inner cylinder 29.

Further, the position of the adjusting cylinder 34 can be adjusted in a stepless manner by the amount of elevation thereof, and the amount of heat generated can be adjusted in a stepless manner. This adjustment lever 4G has a stop pin 48 and a resistance hole 4.
9, the adjustment cylinder 34 is held at any of the four lowered positions,
The adjustment cylinder 34 will not be lowered due to its weight.

Note that the operating mechanism 43 for raising and lowering the adjustment cylinder 34 is not limited to the above configuration, and any appropriate mechanism can be used.

(Effects of the Invention) According to the present invention, even if a part of the mixed gas in the combustion chamber A enters the inner flame tube through the vent hole of the inner flame tube during combustion, this unburned gas is transferred to the inner flame tube. and the guide cylinder, rises, and reenters the combustion chamber A near the upper end of the gap B, where it is combusted by the flame and, therefore, contains a high concentration of CO.
Even if the combustible gas containing combustible gas flows into the inner flame tube, this unburned gas will not diffuse into the inner flame tube, and even if the flame falls during weak combustion, the upper part of the inner flame tube will not pass through. High concentration of C from stomata
O is not directly released into the atmosphere, there are almost no unburned gas components inside the inner flame tube, and the air discharged from the top of the inner flame tube is clean and has good exhaust gas characteristics.

In addition, by connecting the lower part of the gap B between the inner flame cylinder and the guide cylinder and closing the upper part, the unburned gas and the clean air flow are reliably separated, and the inner flame of the unburned gas is closed. It is possible to reliably prevent leakage to the upper part of the cylinder.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a combustion device showing an embodiment of the present invention, and FIG. 2 is a perspective view of its guide cylinder. 5.Light wick as combustion supply section, 21.Inner flame tube, 22
...Outer flame cylinder, 23...Outer cylinder, 26a, 26b --
Ventilation hole, 51...Guiding unit, A...Combustion chamber, B...Gap. ': 4j measurement

Claims (2)

[Claims] (1) An inner flame tube having a large number of ventilation holes, an outer flame tube arranged outside the inner flame tube and having a large number of ventilation holes, and an outer flame tube arranged outside the outer flame tube. and a fuel supply section provided at the lower part of the combustion chamber formed between the inner flame tube and the outer flame tube, and a position disposed inside the inner flame tube and facing the fuel supply section. A liquid fuel characterized by comprising: a guide cylinder extending from the vicinity to a position below the upper end of the inner flame cylinder, and shielding a gap formed between the inner flame cylinder and the inner flame cylinder with its lower part. Combustion device. (2) An inner flame tube having a large number of ventilation holes; an outer flame tube disposed outside the inner flame tube and having a large number of ventilation holes; and an outer flame tube disposed outside the outer flame tube. and a fuel supply section provided at the lower part of the combustion chamber formed between the inner flame tube and the outer flame tube, and a position disposed inside the inner flame tube and facing the fuel supply section. A guide cylinder extending from the vicinity to approximately the middle of the inner flame cylinder, and shielding the gap formed between the inner flame cylinder at its lower part and substantially sealing it at its upper part. liquid fuel combustion equipment.