JPH0670485B2 - Combustion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for household heating or the like.

2. Description of the Related Art Conventionally, as this type of combustion apparatus, there is a wick type combustion apparatus used in oil stoves and the like. Unlike the oil fan heater, this wick-type combustion device does not require a 100V power supply, that is, it does not require a power cord, so it has the advantage of being easy to carry, but on the other hand, if the amount of combustion is reduced slightly, a large amount of CO will start to burn. There was a problem that the amount adjustment range was narrow.

As a solution to such a problem, the applicant has already proposed a combustion device as shown in FIG. 2 that allows a wide range of combustion amount adjustment. Explaining this combustion device below,
In FIG. 2, reference numeral 1 denotes a wick, which is set between a core inner cylinder 2 and a core outer cylinder 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 fire tray 4 and an outer fire tray 5, respectively.
An inner flame cylinder 6 and an outer flame cylinder 7 are placed. The tip of the wick 1 is a combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7 during combustion.
It is exposed inside, where combustion vaporization takes place. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, the outer flame cylinder 7, and the outer cylinder 9 are sequentially arranged from the inside in a substantially concentric manner and are integrated by a fixing pin 10. 11
Are air holes provided in a large number in the inner flame cylinder 6 and the outer flame cylinder 7. Reference numeral 12 denotes an inner-flame cylinder top plate that closes the upper end opening of the inner-flame cylinder 6 and has a vent hole 13 that communicates upward from the inside of the inner-flame cylinder 6. Reference numeral 14 is a flame spreading plate placed on the inner flame cylinder top plate 12. A throttle portion 15 is formed on the upper end of the outer cylinder 9, and the throttle portion 15 is further formed.
The red flame portion 16 is formed in the outer flame cylinder 7 above 15 and the through hole 17 having a large opening is provided. Reference numeral 18 denotes a transparent cylinder made of a transparent material such as glass, which is placed on the outer flame cylinder 9.
Reference numeral 19 denotes a top frame, which is mounted on the upper end of the red heat section 16 so as to shield the upper end of the air passage 20 between the red heat section 16 and the transmission tube 18, and fixes the transmission tube 18. Reference numeral 21 denotes a flow control tube installed inside the inner flame tube 6 and extends upward from the vicinity of the position facing the tip of the wick 1 to near the tip of the inner flame tube 6 and is formed between the inner flame tubes 6 Is provided so that the bottom surface thereof is shielded. 23 is an air introduction path. Reference numeral 24 denotes a combustion control cylinder, which is set at the upper inside of the outer flame cylinder pore portion 25, and the upper end extends to the vicinity of a position facing the throttle portion 15 of the outer flame cylinder 7, and an air chamber 26 is formed between the pore portion 25 and the outer flame cylinder. Has been done. Reference numeral 27 denotes a communication hole provided on the wall surface of the combustion control cylinder 24, and a large number of communication holes 27 are provided uniformly so as to connect the air chamber 26 and the combustion chamber 8. Reference numeral 28 is a ventilation hole provided on the lower wall surface of the flow control cylinder 21. 29 is a control area 22 directly above the ventilation hole 28
Is a shielding portion that divides the lower control region 30 and the upper control region 31 and is formed by projecting the control cylinder 21 in the outer peripheral direction by applying a beading process or a flare process. Reference numeral 32 is a ventilation part which is set so as to have a constant space between the flow restricting cylinder 21 and the inner flame cylinder top plate 12.

In the above structure, when the wick 1 is ignited, combustion starts, and a high temperature combustion gas generated by combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for combustion is the air holes of the inner flame cylinder 6 and the outer flame cylinder 7. 11 and the through holes 17 of the red heat section 16 are supplied into the combustion chamber 8 to continue combustion. At this time, the air supplied from the inside of the inner flame cylinder 6 is divided into the air supplied from below the flow restricting cylinder 21 to the vicinity of the wick 1 and the flow of air rising in the air introduction passage 28. A part of the raised air passes through the ventilation hole 28 and is supplied to the combustion chamber 8. Further, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and the upper part thereof through the air holes 11 and the air holes 13. Further, a part of the air flows down to the upper control region 31, and is also supplied to the combustion chamber 8 from the air holes 11 located relatively below. On the other hand, the vaporized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, since the lower control basin 30 and the upper control basin 31 have a negative pressure, a part of the mixed gas flows into the lower control basin 30 and the upper control basin 31. Therefore, the lower control region 30 and the upper control region 31 are filled with unburned gas. This unburned gas is mixed with the air flow in the ventilation hole 28 and the ventilation portion 32, and is again supplied to the combustion chamber. Therefore, during strong combustion, unburned gas and air are supplied to the vicinity of the upper end of the combustion chamber 8 from the vicinity of the upper end of the inner flame cylinder 6 in a well-mixed state, so that they are efficiently combusted in the vicinity of the region A, and the combustion cannot be completed here. The combustion gas is burned by the flame formed above. Next, when the exposed height of the wick 1 is reduced to reduce the combustion amount, the flame gradually descends into the combustion chamber 8. The flow in this case is the same as that in the strong combustion, but the vaporized gas Is significantly reduced, the amount of unburned gas flowing into the upper control region 31 is also reduced. Therefore, the vicinity of the area B becomes a good mixing area, flame holding is formed in this area, the wall surface of the inner flame tube 6 is red-heated, and combustion is completed by the flame formed above the wall. In this case, most of the unburned gas that has flowed into the upper control region 31 is supplied to the combustion chamber 8 and burned by the flame. Therefore, there is almost no unburned gas component in the upper control region 31 that faces above the flame. The air discharged from the air holes 11 and the air holes 13 above the flame is clean, and the exhaust gas characteristics (CO / CO ₂ ) do not deteriorate. Therefore, the combustion amount can be narrowed down to a considerably low place, and the combustion amount adjustment range becomes wide.

Further, even at the time of ignition, air is efficiently supplied from the communication hole 27 and the vent hole 28 to the lower side of the combustion chamber 8, so that rapid combustion is promoted, and CO and odor are little generated. Also, the same effect can be obtained when the material is burned for a long time in a well-sealed room. That is, in the oxygen deficient state, the combustion amount decreases with the decrease in oxygen concentration, and a phenomenon similar to that in the case where the exposed height of the wick 1 is reduced to decrease the combustion amount is generally observed. Since air is supplied to the combustion chamber 8 from the pores 28, combustion is promoted there and the oxygen deficiency characteristic is improved.

Problems to be Solved by the Invention However, in the above-described configuration, the pores 33 of the inner flame cylinder 6 facing the vent holes 28 of the flow restricting cylinder 21 cause the amount and flow velocity of the air flowing in from the vent holes 28. Since it is easily affected by changes in the above, the flame holding becomes very unstable, and there are practical problems such as pulsating noise and swaying of flame during combustion. This phenomenon is
This is especially likely to occur during strongest combustion where the thermal draft is strong and the flow velocity is maximum, or when there is an external air flow such as wind.

The present invention eliminates such conventional problems, by preventing the sound and flame sway during strongest combustion or wind blowing,
It is an object of the present invention to obtain a safe and comfortable combustion device which has good combustion characteristics, a wide range of adjustment of combustion amount, and has no practical problems.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, a wind shield plate is provided between the inner flame cylinder and the flow restricting cylinder in a portion facing the ventilation hole of the flow restricting cylinder. It has a different structure.

Effect The present invention suppresses the influence of the air from the ventilation holes of the flow restricting cylinder directly on the flame holding pores of the inner flame cylinder, and reduces the fluctuation of the flow velocity and the flow rate to a certain degree, and thereby supplies the gas. Therefore, the combustion can be continued without generating the combustion noise or the fluctuation of the flame.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. However, the same parts as those in FIG. 2 already described will be denoted by the same reference numerals and description thereof will be omitted, and only different parts will be described.
A wind shield plate 34 is provided between the internal flame cylinder 6 and the flow restrictor cylinder 21 facing the ventilation hole 28 of the flow restrictor cylinder 21, and the wind shield plate 34 has a shield 29 at its upper end.
It is fixed (welded) to and has a lower portion formed with an opening 34a.

In the above structure, the combustion is carried out in the same manner as that shown in FIG.
Since the wind shield plate 34 is provided on the portion facing the inner flame cylinder 6 of the portion facing the 28, the air entering from the ventilation holes 28 is protected by the wind shield plate 34.
After hitting the air, it flows out from the lower opening and is supplied to the pores 33, so the flame holding in that portion is not disturbed by the flow of air, and combustion noise is not generated. In addition, in the form that the air from the ventilation holes 28 has been cleared,
Since it is taken in by, it can be efficiently mixed with unburned gas. This reason is the same when the exposed height of the wick 1 is lowered. In this way, prompt combustion is promoted without producing combustion noise or flame disturbance, and clean combustion with little CO or odor can be realized.

EFFECTS OF THE INVENTION As described above, according to the combustion device of the present invention, the adjustment range of the combustion amount is widened, and since the wind shield is provided in the portion of the flow restricting cylinder facing the ventilation hole, the combustion noise and There is no fluctuation of the flame, and moreover, the stable flame is formed in the pores of the inner flame tube facing the wind shield, so that the red glow brightness does not decrease and the combustion amount adjustment range It is possible to obtain a safe and practically comfortable combustion device.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part of a combustion apparatus showing a conventional example. 1 ... wick, 6 ... inner flame cylinder, 7 ... outer flame cylinder, 8 ... combustion chamber, 9 ... outer cylinder, 11 ... air hole, 18 ... transmission cylinder, 21 ...
Control cylinder, 22 ... Control area, 24 ... Combustion control cylinder, 25 ... Pore, 26 ... Air chamber, 27 ... Communication hole, 28 ... Vent hole, 29 ...
… Shielding part, 33 …… Inner flame tube pore, 34 …… Wind shield.

Claims (1)

[Claims] 1. An outer flame cylinder comprising a pore part having a large number of air holes and a red heat part formed above the pore part, and an inner flame cylinder having a large number of air holes arranged inside the outer flame cylinder. , An outer cylinder positioned outside the outer flame cylinder, a transmission cylinder mounted above the outer cylinder, and a vertically movable set at a lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder. The wick and the inner flame tube extending in the vicinity of the inner flame tube from a position facing the wick to a vicinity of the upper end of the inner flame tube, and a low surface shields the restricted region formed between the wick and the inner flame tube. A flow restricting cylinder, a ventilation hole provided in at least one location on the wall surface of the restricting cylinder, a shielding portion that divides the restriction flow region into upper and lower portions immediately above the ventilation hole, and above the inside of the pore portion of the outer flame cylinder. A combustion control cylinder that is arranged to form an air chamber between the combustion control cylinder and the pore portion; and a communication hole provided in the wall surface of the combustion control cylinder, and Combustion device provided with windshield plate between the inner flame cylinder to vent the opposite of the serial system flow tube and the flow restriction tube.