JPH0722574Y2 - Liquid fuel combustion device - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a liquid fuel combustion device such as a wick type oil stove used for heating at home, etc. Adjustable combustion device.

(Prior Art) Conventionally, it was difficult to adjust the combustion amount in the wick type oil stove because the amount of protrusion of the wick was constant, but after that, the exhaust gas characteristics, especially CO / CO ₂ did not deteriorate. Petroleum stoves have become common because the amount of protrusion of the wick can be adjusted within an allowable range and the amount of combustion can be adjusted. However, the combustion amount of this kind of oil stove is 90-80% of the maximum combustion amount.
Since the room temperature can be adjusted only, the fire must be extinguished when the room temperature rises excessively, or the window must be opened to adjust the room temperature, which is disadvantageous in terms of operability and economy. And the reason why you can adjust the combustion amount a little in this way is
During weak combustion with a small amount of protrusion of the wick, a flame is formed in the combustion chamber, which causes the unburned gas containing high-concentration CO that has leaked from the combustion chamber into the inner flame of the combustion cylinder to be released directly into the atmosphere. This is because the total amount of hydro carbon is increased and CO / CO ₂ is deteriorated to generate an odor.

Therefore, as disclosed in Japanese Patent Laid-Open No. 62-108909, the inner flame of the combustion cylinder extends from the vicinity of the position facing the wick to a position below the upper end of the inner flame, and the inner flame By providing a control fluid that shields the flow control area formed between the cylinder and its bottom surface, high-concentration CO leaked into the flow control area
There has been proposed a combustion device in which unburned gas containing is shielded by a clean air flow supplied to the upper side of the inner flame cylinder so that the unburned gas is not directly released into the atmosphere.

However, in such a structure of the combustion device, due to the control fluid provided inside the inner flame cylinder, it becomes difficult for the air necessary for combustion to be supplied from the inside of the inner flame cylinder into the combustion chamber, and the amount of protrusion of the wick is increased. The amount of air commensurate with the changing amount of vaporized gas is not supplied, and an unstable combustion state is likely to occur. In particular, during weak combustion in which the amount of protrusion of the wick is small, the amount of air is likely to be insufficient with respect to the amount of vaporized gas, and the amount of heat generation is likely to be small.

(Problems to be Solved by the Invention) In the above-described conventional technology, unburned gas containing high concentration of CO leaked into the inner flame cylinder during weak combustion with a small amount of protrusion of the wick is directly released into the atmosphere. To prevent this, a control fluid is provided inside the inner flame tube, so it becomes difficult to supply the proper amount of air commensurate with the amount of vaporized gas, and an unstable combustion state and a drop in the calorific value are likely to occur. There was a problem.

Therefore, the present invention prevents a sharp deterioration of the combustion characteristics at the time of weak combustion and enables the supply of the amount of air commensurate with the amount of vaporized gas, thereby providing a stable combustion state with good combustion characteristics. It is an object of the present invention to provide a liquid fuel combustion device capable of performing various combustion amount adjustments.

[Structure of the Invention] (Means for Solving the Problem) The present invention is provided with a wick lifting mechanism 44 that raises the wick 13 to the combustion region in conjunction with the movement of the operating body 52, and has a large number of air holes 20, 15 respectively. An outer cylinder 33 having an outer flame cylinder 21 and an inner flame cylinder 16 formed to cover the wick 13 is provided, and air supply holes 34 and 35 are provided at corresponding positions on the lower side surfaces of each.
And the inner cylinder 32, and the outer cylinder 33 or the inner cylinder 32 is moved up and down to expand and contract the air conditioning cylinder 31.
14 is provided in the inner flame cylinder 16 and is provided with an air-conditioning tube expansion / contraction mechanism 45 that expands / contracts the air-conditioning tube 31 in conjunction with the movement of the operation body 52, and lowers the wick 13 by operating the operation body 52. Accordingly, the air adjusting cylinder 31 is extended to extend the air supply hole 3
4, 35 gradually become non-compliant and closed, and as the wick 13 rises, the air adjusting cylinder 31 shrinks and the air supply holes 34, 35 gradually become compatible and open. The air hole 15 of the inner flame cylinder 16 is formed such that a portion thereof substantially facing the air supply hole 34 of the air adjusting cylinder 31 has a larger opening ratio than other portions.

(Operation) With the above-described configuration, the present invention operates the operation body 52 to operate the wick.
At the time of weak combustion in which the amount of protrusion of 13 is reduced, the air control cylinder 31 extends and the air supply holes 34, 35 are closed in a non-corresponding state. As a result, the unburned gas leaked from the combustion chamber 28 formed between the outer flame cylinder 21 and the inner flame cylinder 16 into the inner flame cylinder 16 expands and the air supply holes 34 and 35 are closed. The unburned gas introduced between the cylinder 31 and the inner flame cylinder 16 mixes with the clean air supplied upward through the inside of the air conditioning cylinder 31 and inside the combustion chamber 28 from the vicinity of the upper end of the air conditioning cylinder 31. To accelerate combustion. Further, as the protrusion amount of the wick 13 is increased by operating the operation body 52, the air adjustment cylinder 31
Is reduced and the air supply holes 34, 35 are gradually opened in a corresponding state, and an appropriate air amount commensurate with the amount of vaporized gas generated from the wick 13 is opened from the air supply holes 34, 35 of the air adjusting cylinder 31. Smoothly flowing into the air holes 15 of the inner flame cylinder 16 having a large size and being supplied to the combustion chamber 28, a stable combustion state is obtained. Also,
During strong combustion in which the amount of protrusion of the lamp core 13 is increased by operating the operation body 52, the air supply holes 34 and 35 are fully opened, and a large amount of air is supplied, so the amount of heat generation increases.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 3, reference numeral 1 denotes a base on which a fixed tank 2 is fixed via a support frame (not shown). Further, a fuel tank (not shown) for supplying a liquid fuel such as kerosene to the fixed tank 2 at a constant level is detachably mounted on one side of the upper surface of the fixed tank 2.

A combustion section 3 is provided on the other side above the fixed tank 2. Next, the structure of the combustion unit 3 will be described with reference to FIGS.
It will be described with reference to the drawings.

An opening 4 is formed on the other side of the upper portion of the fixed tank 2, and a substantially cylindrical burner basket 6 having a reduced diameter at the upper portion is fixed around the opening 4 via a step 5. The burner basket 6 has a stepped portion 7 that spreads outward at the upper portion, and a flange-shaped fire tray portion 8 is formed at the upper end portion. A large number of air holes 9 are provided in the burner basket 6 located between the step portion 7 and the fire tray portion 8. Further, a cylindrical core guide 10 is integrally erected on the inner bottom surface of the fixed tank 2, and the upper part of the core guide 10 faces the upper part of the burner basket 6 with a small space from the inside. At the same time, a wick guide portion 12 is provided on the upper end surface of the burner basket 6 so as to face the stepped portion 7 below the fire tray portion 8 of the burner basket 6 and a partially opened lead guide cap 12 is provided. ing.

A cylindrical wick 13 made of incombustible fiber is supported between the burner basket 6 and the wick guide 10 so as to be vertically movable.
The lower part is always immersed in the liquid fuel in the fixed tank 2.

Further, a combustion cylinder 14 that covers the wick 13 is provided above the fire plates 8 and 11. Next, the structure of the combustion cylinder 14 will be described.

A cylindrical inner flame tube 16 having a large number of air holes 15 is placed on the fire tray 11 on the side of the lead guide 10. This air hole
The opening 15 is formed so as to have a larger diameter so that a portion of the fixed-side inner cylinder 32, which constitutes an air adjusting cylinder 31 to be described later, that substantially faces the air supply hole 34 has a larger opening ratio than the other portions. A straightening vane base 18 having an air passage port 17 formed thereon is fixed to the upper end surface of the inner flame cylinder 16, and a straightening vane 19 is fixed on the straightening vane plate 18.

On the other hand, a cylindrical outer flame cylinder 21 having a large number of air holes 20 is concentrically located on the outer peripheral side of the inner flame cylinder 16 on the burner portion 8 of the burner basket 6. A glass stopper 22 is fixed to the upper end of the outer flame tube 21 in a flange shape. A substantially cylindrical metal outer cylinder 23, which is concentrically located on the outer peripheral side of the outer flame cylinder 21, is attached by a cross pin (not shown) to the outer flame cylinder 21.
A glass outer cylinder 24 is attached between the glass holder 22 and the glass holder 22. Further, a gap is formed between the lower end of the metal outer cylinder 23 and the burner portion 8 of the burner basket 6, and this gap serves as an air intake port 25 that opens downward. Also,
A flange-shaped air restriction portion 27 is formed on the upper end of the metal outer cylinder 23 via a step portion 26.

A combustion chamber 28 is formed between the inner flame cylinder 16 and the outer flame cylinder 21 in the combustion cylinder 14, and red heat is generated in the outer flame cylinder 21 above the air restriction portion 27 of the metal outer cylinder 23. The portion 29 is formed, and the air hole 20 of the red heat portion 29 is formed with a larger opening ratio than the air hole 20 of the outer flame cylinder 21 and the air hole 15 of the inner flame cylinder 16 below the air restriction portion 27. There is.

Further, a guide disc 30 having a part opened inside is horizontally fixed to the lower portion of the inner flame cylinder 16, and the inner peripheral side of the inner flame cylinder 16 is provided on the guide disc 30. A concentric position is provided with an expandable / contractible air control cylinder 31. The air adjusting cylinder 31 has an inner cylinder 32 and an outer cylinder 33, and a large number of large air supply holes 34, 35 are provided at corresponding positions on the lower side surfaces of the inner cylinder 32 and the outer cylinder 33. The air supply holes 34, 35 are provided so as to substantially correspond to the air restriction portion 27. A lower end portion of the inner cylinder 32 is fitted and fixed to a step portion 36 formed upright on the guide disc 30, and a guide disc 38 having a large number of air holes 37 is fixed to an upper end portion thereof. ing. On the other hand, in the outer cylinder 33, a disc 40 having a large number of air holes 39 at the upper end is horizontally fixed,
The disc 40 is placed on the upper end of the inner cylinder 32. Then, the air supply hole 34 of the inner cylinder 32 and the air supply hole of the outer cylinder 33
The outer cylinder 33 surrounds the inner cylinder 32 as a whole by holding a slight gap on the outer peripheral side of the inner cylinder 32 in a state in which 35 are fully opened at corresponding positions. Also, a guide disk for the inner flame tube 16
A large number of air holes 41 are provided around the periphery of the inner cylinder 32 outside the inner cylinder 32.

Further, a movable rod 42 is vertically provided at the center of the air adjusting cylinder 31, and the movable rod 42 is provided between the guide disk 30 of the inner flame cylinder 16 and the guide disk 38 of the inner cylinder 32. It penetrates the center part slidably, and its upper end is the outer cylinder.
The disc 33 is penetrated and locked in the center of the disc 40, and a snap ring 43 is provided at a projecting end of the disc 40 to prevent the disc 40 from coming off. Further, the lower end of the movable rod 42 has the core guide 10
Trying to reach inside.

Further, on the front side of the fixed tank 2, there are provided a wick raising / lowering mechanism 44 for moving the wick 13 up and down, and an air adjusting tube extending / contracting mechanism 45 for expanding / contracting the air adjusting tube 31 by moving the outer tube 33 up and down. Has been. Next, these wick lifting mechanism 44
The structure of the air-conditioning tube expansion / contraction mechanism 45 will be described.

A vertical axis 46 of the core is rotatably and horizontally inserted through and supported by the fixed tank 2.
A pair of lifting plates 47 are fixed inside the.
The lifting plate 47 is provided at a right angle to the core vertical shaft 46, and is positioned on both side surfaces of a cylindrical core holder 48 fixed to the outer peripheral surface of the wick 13. Further, an L-shaped long groove 49 is formed at the tip of each lifting plate 47, and a core holder shaft 50 protruding from both side surfaces of the core holder 48 is engaged with the long groove 49. The wick 13 moves up and down in association with the rotation of the wick vertical shaft 46.

A support plate 51 is erected on the base 1 at a position rearward of one end of the core vertical shaft 46.
A base end of an operating lever 53, which is arranged in a direction orthogonal to the core vertical shaft 46 and has an operating knob 52 as an operating body at its tip, is rotatably supported in the vertical direction. Further, one end of the interlocking lever 54 provided in parallel to the operation lever 53 toward the base end side of the operation lever 53 is fixed to one end of the core vertical shaft 46, and the other end of the interlocking lever 54 is fixed. The shaft 55 is fixed to the operation lever 53 side, and
Further, the shaft body 55 is engaged with the operation lever 53 in a long hole 53a formed on the front side of the shaft support portion at the base end. When the operation lever 53 is rotated in the vertical direction by operating the operation knob 52, the interlocking lever 54 pivots in the vertical direction about the core vertical shaft 46 as a fulcrum. 46 rotates so that the wick 13 moves up and down.

Next, the configuration of the air-conditioning tube expansion / contraction mechanism 45 will be described.

The horizontal portion of the drive shaft 57 is located on the lower side of the fixed tank 2 on the base 1 so as to be rotatable and horizontal via a shaft support member 56.
57a is supported. This horizontal portion 57a is the core vertical shaft 46.
It is provided in parallel with the operation lever 5 of this horizontal part 57a.
A bent portion 57b formed by bending in parallel with the operation lever 53 is provided at the end on the 3 side, and an engaging portion that engages with the lower portion of the operation lever 53 is provided at the end of the bent portion 57b. 57c is bent. Further, a bent portion 57d formed by bending toward the center of the core guide 10 is provided at an end portion of the horizontal portion 57a on the core guide 10 side, and further, an end portion of the bent portion 57d is provided. The engaging portion 57e is bent and formed. On the other hand, in the lead guide 10, a guide plate 58 having a partly opened is horizontally fixed, and slides on a guide portion 12a formed at the central portion of the guide plate 58 and the central portion of the lead guide cap 12. A drive rod that penetrates as much as possible and whose upper end abuts on the lower end of the movable rod 42.
59 is supported so as to be movable up and down, and a shift plate 61 having a long hole 60 is fixed to the lower end of the drive rod 59. The engaging portion 57e of the drive shaft 57 is engaged with the long hole 60 of the shift plate 61, and the drive rod 59 moves up and down in association with the rotation of the drive shaft 57. ing.

A spring 62 is wound around the drive shaft 57. One end of the spring 62 is engaged with the lower portion of the bent portion 57b of the drive shaft 57 and the other end is locked on the base 1. The drive shaft 57 is constantly urged to rotate upward. This allows the drive shaft
The engagement portion 57c of 57 is adapted to elastically engage the operation lever 53 by the bias of the spring 62.
When 52 is operated to rotate the operation lever 53 upward, the interlocking lever 54 rotates upward, the wick 13 descends, and the drive shaft
57 is driven upward by the biasing force of the spring 62.
When 59 is moved up and conversely the operating lever 53 is turned downward, the interlocking lever 54 turns downward, the wick 13 rises, and the drive shaft 57 turns downward against the bias of the spring 62. The drive rod 59 is lowered.

Next, the operation of the above configuration will be described.

First, the operation of the wick raising / lowering mechanism 44 and the air-conditioning tube expansion / contraction mechanism 45 will be described.

As shown in FIG. 2 and FIG. 4, when the operating knob 52 is pushed downward, the operating lever 53 pivots downward with the shaft supporting portion at the base end as a fulcrum, and the interlocking lever 54 moves through the shaft body 55. The vertical shaft 46 rotates downward with the vertical shaft 46 as a fulcrum, and the core vertical shaft 46 and the lifting plate 47 rotate clockwise together with the interlocking lever 54, and the wick 13 is largely projected onto the fire tray 8. Further, with the rotation of the operation lever 53, the engaging portion 57 of the drive shaft 57 elastically engaged with the operation lever 53.
When c is pushed down, the drive shaft 57
Rotate downwards against the bias of 2. And the shift plate 61
And the drive rod 59 has the long hole 60 of the shift plate 61 and the engaging portion 57.
The movable rod 42 and the outer cylinder 33 of the air adjusting cylinder 31 descend due to their own weight by the engagement with e, and the movable rod 42 and the outer cylinder 33 of the air adjusting cylinder 31 descend.
31 is reduced, the outer cylinder 33 surrounds the inner cylinder 32 as a whole, and the air supply hole 35 of the outer cylinder 33 and the air supply hole 34 of the inner cylinder 32 are in corresponding positions and are fully opened. It becomes a strong combustion state.

Here, for example, when a heater (not shown) is energized to contact the protruding wick 13, the wick 13 is ignited to start combustion. When the operating knob 52 is pushed up to adjust the amount of combustion during this combustion operation as shown in FIGS. 1 and 3, the operating lever 53 rotates upward and the interlocking lever 54 also rotates upward to move the core. The vertical shaft 46 and the lifting plate 47 rotate in the counterclockwise direction, and the protrusion amount of the wick 13 gradually decreases. Further, with the upward rotation of the operation lever 53, the drive shaft 57 is rotated upward by the urging force of the spring 62, and the shift plate 61 and the drive rod 59 are raised, whereby the drive rod 59 is moved. 42 is pushed up, and the outer cylinder 33 rises integrally with the movable rod 42. At this time, the air supply hole 35 of the outer cylinder 33
The air supply hole 34 of the inner cylinder 32 moves to a non-corresponding position, and only a part thereof is opened. That is, as the amount of protrusion of the wick 13 is decreased by operating the operation knob 52, the outer cylinder 33 is gradually raised, so that the air supply holes 34, 35 are gradually less overlapped and the opening amount is reduced. On the contrary, wick 13
As the outer cylinder 33 gradually descends as the amount of protrusion increases, the air supply holes 34 and 35 gradually increase in overlapping portions and the opening amount increases. In this way, the wick
The opening amount of the air supply holes 34, 35 adapted to the protruding amount of 13 can be obtained. Then, as shown in FIG. 1 and FIG.
When the protrusion amount of the wick 13 is reduced, that is, when the upper end of the wick 13 slightly protrudes from the fire tray 11,
It rises about 1/3, and the air conditioning cylinder 31 is almost 2
Extends to a height of / 3 or more. As a result, the air supply holes 34,3
5 is a non-corresponding position, and the air supply hole 34 is substantially closed by the side wall of the outer cylinder 33, and the air supply hole 35 is substantially closed by the side wall of the inner cylinder 32, resulting in a weak combustion state.

To extinguish the fire, push up the operating knob 52 strongly. Then, the core vertical shaft 46 and the lifting plate 47 integrally rotate largely in the counterclockwise direction via the interlocking lever 54, and the wick 13 is lowered and retracted, whereby the fire is extinguished. In this case, the angle at which the drive shaft 57 rotates upward due to the bias of the spring 62 is determined by the long hole 60 of the shift plate 61 and the engaging portion 57e.
The engaging portion 57c is disengaged from the operation lever 53 because the engagement portion 57c is restricted by the engagement with.

Next, the combustion action will be described.

Combustion starts when the wick 13 is ignited, and a high temperature combustion gas due to combustion rises in the combustion chamber 28 to generate a draft force, and the combustion air is the air holes 15 of the inner flame cylinder 16 and the air of the outer flame cylinder 21 It is supplied from the hole 20 into the combustion chamber 28 and the combustion is continued.
At this time, the combustion air supplied from the air hole 15 of the inner flame cylinder 16 into the combustion chamber 28 is the air hole 41 of the guide disk 30 and the air adjusting cylinder.
Combustion air supplied from the air holes 37, 39 in the upper part of 31 and the air supply holes 34, 35 in the side parts and supplied from the air holes 20 of the outer flame cylinder 21 into the combustion chamber 28 is the metal outer cylinder 23. Supplied from the air intake 25.

In this case, the air supply holes 34 and 35 are formed to be large so that the opening amount can be adjusted, and the air hole 15 at a portion of the inner flame cylinder 16 that is substantially opposed to the air supply holes 34 and 35 is the other portion. Since the opening ratio is made larger to correspond to the opening ratio of the air supply holes 34, 35, the combustion air from the air supply holes 34, 35 is smoothly blocked by the inner flame cylinder 16 and has a large opening ratio. It is supplied through the air holes 15 to the combustion chamber 28.
If the opening ratio of the air holes 15 in the portion facing the air supply holes 34, 35 is small, the difference in the opening ratio causes resistance and the combustion air does not flow smoothly, and combustion becomes unstable especially at the initial stage of combustion. At this time, a flame is attached to the air holes 15 and an abnormal noise such as a lump or a lump is generated. Therefore, by increasing the aperture ratio only in the portion of the inner flame tube 16 that faces the air supply holes 34 and 35 as in the present invention, the above-mentioned problems can be solved.

Then, as shown in FIG. 2, during strong combustion in which the amount of protrusion of the wick 13 is large, a flame F ₁ is formed at the upper end of the combustion chamber 28, and the air supplied from the inside of the inner flame tube 16 is as shown by the arrow. Guide disc
A large amount of air is supplied from the air holes 41 of 30, the air supply holes 34 and 35 that are fully opened at the corresponding positions of the air conditioner cylinder 31 in a reduced state, and the air holes 37 and 39 above the air conditioner cylinder 31, and a stable combustion state. The unburned gas that has risen in the combustion chamber 28 can be combusted, and the flame formed at the upper end of the combustion chamber 28
Burned completely by F ₁ .

Further, as shown in FIG. 1, during weak combustion in which the amount of protrusion of the wick 13 is small, the flame F ₂ is formed in a state of falling into the combustion chamber 28, and the air supplied from the inside of the inner flame tube 16 is Since the air adjusting cylinder 31 extends and the air supply holes 34, 35 are closed, a small amount is supplied from the air hole 41 of the guide disk 30 as shown by the arrow, and the air above the air adjusting cylinder 31 in the expanded state is supplied. A large amount is supplied from the hole 39. Then, the air hole 15 at the bottom of the inner flame tube 16
The air supplied from the inside to the combustion chamber 28 becomes a mixed gas with the vaporized fuel and rises in the combustion chamber 28. At this time, since the space 63 between the inner flame cylinder 16 and the air conditioner cylinder 31 in the expanded state becomes negative pressure due to the air supplied from above the air conditioner cylinder 31, a part of the mixed gas is in the inner flame cylinder. 16 Flows into the inner space 63, rises in the space 63 while mixing with the air from the air holes 41 of the guide disc 30, and is further supplied above the air adjusting cylinder 31 near the upper end of the air adjusting cylinder 31. The mixed air is supplied again to the inside of the combustion chamber 28 through the air hole 15 of the inner flame cylinder 16, forms flame holding in this portion, and is completely burned by the flame F ₂ formed thereabove. . In this way, unburned gas containing high concentrations of CO is prevented from being released directly into the atmosphere, and CO / C
Prevents O ₂ from deteriorating and generating odor.

Further, since the air supply holes 34 and 35 of the air adjusting cylinder 31 are opened in an amount adapted to the protruding amount of the wick 13, the combustion is performed in the combustion chamber 28 in an appropriate amount corresponding to the generated amount of vaporized gas. Air for supply is supplied and a stable combustion state is obtained,
At the time of strong combustion, the air control cylinder 31 shrinks and the air supply holes 34, 35
However, a large amount of heat is obtained because a large amount of air is supplied by fully opening.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the expansion and contraction of the air adjusting cylinder may be such that the movable rod is locked to the inner cylinder side and the disc of the outer cylinder is removed to move the inner cylinder up and down. The number, shape, etc. may be appropriately selected. Also, the inner flame tube
As shown in FIG. 5, as a method of increasing the opening ratio of the 16 air holes 15, the inner cylinder 32 on the fixed side constituting the air adjusting cylinder 31 is formed.
In addition to forming the air holes 15 of the portion facing the air supply hole 34 of the same diameter larger than the air holes 15 of the other portions, as shown in FIG. To form,
There are various methods.

[Advantages of the Invention] The present invention is provided with a combustion cylinder having an outer flame cylinder and an inner flame cylinder each having a large number of air holes, and a combustion cylinder covering the wick. An air-conditioning tube that includes a tube and an inner tube, and is expandable and contractable by moving the outer tube or the inner tube up and down is provided in the inner flame tube of the combustion tube, and the wick is lowered according to the operation of the operating body. The air adjusting cylinder expands and the air supply hole gradually becomes unsupported and closed, and as the wick rises, the air adjusting cylinder contracts and the air supply hole gradually becomes compatible. And the air hole of the internal flame cylinder is formed with a larger opening ratio in the portion that substantially faces the air supply hole of the air conditioning cylinder than in the other portions, so that the combustion characteristics during the weak combustion are sharply increased. And prevent such deterioration, It is possible to provide a liquid fuel combustion apparatus that enables supply of air commensurate with the amount of vaporized gas, has a stable combustion state with favorable combustion characteristics, and can perform a large adjustment of the combustion amount.

[Brief description of drawings]

FIG. 1 is a sectional view of a combustion section showing weak combustion, FIG. 2 is a sectional view of the combustion section showing strong combustion, and FIG. 3 is a partially cutaway perspective view showing the case of weak combustion, FIG. FIG. 5 is a partially cutaway perspective view showing the time of strong combustion, FIG. 5 is a partially cutaway perspective view of a main part, and FIG. 6 is a partially cutaway perspective view showing another embodiment. 13 …… wick 14 …… combustion cylinder 15 …… air hole 16 …… inner flame cylinder 21 …… outer flame cylinder 31 …… air control cylinder 32 …… inner cylinder 33 …… outer cylinder 34, 35 …… air supply holes 44 …… Wicking up / down mechanism 45 …… Air-conditioning tube expansion / contraction mechanism 52 …… Operating knob (operating body)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-108909 (JP, A) real-open Sho-58-181145 (JP, U) real-open Sho-58-142513 (JP, U) real-open Sho-57- 178911 (JP, U) JP 60-46326 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A wick which is soaked in a lower portion in a liquid fuel so that the wick can be moved up and down, a wick raising and lowering mechanism which raises the wick to a combustible range by interlocking with the movement of an operating body, and a large number of air holes respectively A combustion cylinder that has an outer flame cylinder and an inner flame cylinder that cover the wick; and an outer cylinder and an inner cylinder that are provided in the inner flame cylinder and that have air supply holes at corresponding positions on their lower side surfaces. An air-conditioning tube that is made expandable by vertically moving the outer tube or the inner tube, and an air-conditioning tube expanding and contracting mechanism that expands and contracts the air-conditioning tube in conjunction with movement of the operating body. As the wick is lowered by the operation of the body, the air adjusting cylinder extends and the air supply hole gradually becomes unsupported and closed, and as the wick rises, the air adjusting cylinder shrinks and the Air supply holes are gradually relative The air hole of the inner flame cylinder is formed with a larger opening ratio than the other part in the air hole of the inner flame cylinder, which is substantially opposed to the air supply hole of the air conditioning cylinder. Liquid fuel combustion device.