JPH0332683B2 - - Google Patents

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.

Conventional technology Conventionally, in this type of combustion device, the combustion amount is adjusted by
There are two methods: one method is to change the fuel evaporation area by changing the height of the wick, and the other method is to change the fuel evaporation conditions by adjusting the amount of air. As the latter, as shown in FIG. 2, there is one in which a main combustion gas passage 30 and an auxiliary combustion gas passage 1 are provided in the upper part of the combustion chamber 18, and the main combustion gas passage 30 is opened and closed by a passage opening/closing plate 32. That is, during strong combustion, the passage opening/closing plate 32 is raised to open the main combustion gas passage 30, thereby reducing flow resistance and introducing a large amount of air into the vicinity of the tip of the wick 3 and into the primary combustion chamber 8. Get a large amount of combustion. During weak combustion, the passage opening/closing plate 32 is lowered to close the main combustion gas passage 30, increasing the flow resistance and suppressing the amount of air introduced into the vicinity of the tip of the lamp wick 3 and into the primary combustion chamber 8. In this case, not only the amount of fuel vaporized from the tip of the wick 3 is suppressed, but also the amount of air flowing into the primary combustion chamber 8 is suppressed, so the combustion amount can be varied from strong to weak without causing a large change in the air-fuel ratio. so the flame lifts, keeping the flame in the flammable zone,
Flashback is less likely to occur, and the combustion amount can be adjusted over a wide range. (For example, Japanese Utility Model Application Publication No. 58-165409) Problems to be Solved by the Invention However, in the above configuration, the passage opening/closing plate 32 is located above the combustion chamber 18, so the combustion exhaust gas constantly comes into contact with it, resulting in a serious problem. Due to the high temperatures, there were problems with heat resistance and corrosion resistance. In addition, the passage opening/closing plate 3
2, an operating shaft 33 for a release or the like must be passed through the core inner cylinder 1 and extended to a height near the inner fire pan 4 from a release device (not shown), and its movement must be transmitted to the shaft 34. However, since the transmission path for the opening and closing operation becomes very long, the mechanism becomes complicated, and there are problems with the accuracy and robustness of the mechanism's operation.

The present invention solves such conventional problems,
It is an object of the present invention to provide a combustion device having an air amount control device with excellent heat resistance, corrosion resistance, and operability, and with a wide range of combustion amount adjustment.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention is provided with an air introduction pipe inside the inner flame tube for introducing air to the secondary flame port. On the other hand, an air amount control device is provided which controls the air introduced into the inner flame cylinder air hole in conjunction with the wick up/down device.

Effects The present invention can control the fuel vaporization amount with respect to the air amount in a well-balanced manner by the above-described configuration. Furthermore, since the air amount control device is provided inside the inner flame cylinder, it is not exposed to high temperatures and the mechanism is simple.

Embodiments Hereinafter, embodiments of the present invention will be described based on the attached FIG. 1.

1 is a cylindrical core inner cylinder, and 2 is an outer core cylinder. Reference numeral 3 denotes a lamp wick, which is set to be vertically movable between an inner wick tube 1 and an outer wick tube 2. Reference numerals 4 and 5 denote an inner and outer grate formed at the upper ends of the inner core cylinder 1 and the outer core cylinder 2, respectively.
6 is an inner flame tube placed on the inner fire pan 4, and 7 is an outer flame tube placed on the outer fire pan 5.

8 is a primary combustion chamber formed between the inner flame tube 6 and the outer flame tube 7. 9 is an outer cylinder located outside the outer flame cylinder, 1
0 is a cross pin that concentrically integrates the inner flame tube 6, the outer flame tube 7, and the outer flame tube 9. 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 a secondary flame port provided on the wall of the inner flame cylinder 6 at the upper end of the primary combustion chamber 8. Reference numeral 13 denotes an inner flame tube top plate that closes the opening of the inner flame tube 6 directly above the secondary flame port 12. 1
Reference numeral 4 denotes a red-hot part provided in the outer flame cylinder 7 above the constricted part 9a of the outer cylinder 9, and has a large ventilation hole 15 therein. 16 is an outer flame cylinder 7 at the upper end of the primary combustion chamber 8
This is a secondary flame ring installed in the 17 is the outer cylinder 9
A transparent cylinder made of a transparent material such as glass is placed on top and extends above the primary combustion chamber 8. 18 is a secondary combustion chamber formed above the primary combustion chamber 8. Reference numeral 19 denotes a red-hot body provided within the secondary combustion chamber 18, and is constructed integrally with the inner flame cylinder 6. Reference numeral 20 is a top ring to which the upper ends of the transmission tube 17 and the incandescent body 19 are fixed. 21 is a combustion gas passage provided in the top ring. Reference numeral 22 denotes an introduction pipe for forming an air introduction path 23 for introducing air into the secondary flame port 12 in the inner flame cylinder 6, and extends from directly above the fire pan 4 to the secondary flame port 12. 24 is a wick up/down fitting for raising and lowering the wick 3; 25 is a wick up/down device; 26 is an air amount control device in conjunction with the wick up/down device 25;
It is located below the inner cooking pan 4, and its motion is transmitted through an operating shaft 26. Reference numeral 29a designates an internal air inlet opened in the inner fire pan 4 to introduce air into the air inlet pipe 23, and 29b represents an external air inlet to introduce air into the air hole 11 of the inner flame tube 6. Air amount control device 26
The external air inlet 29 is linked with the wick up/down device 25.
It is for controlling the amount of air introduced from the outside air inlet 29b, and is bent downward so as to have a certain gap just below the outside air inlet 29b when it is in the uppermost position.

In the above configuration, when the lamp wick 3 whose tip faces the primary combustion chamber 8 is ignited, combustion starts, and high-temperature combustion gas due to combustion is transferred to the primary combustion chamber 8 and the top ring 2.
A thermal draft is generated by passing through the combustion gas passage 21 of 0, and the air necessary for combustion flows through the air holes 11 of the inner flame tube 6, the outer flame tube 7, and the ventilation hole 1 of the red-hot part 14.
Supplied from 4. The heat of the flame held in each air hole 11 is supplied to the lamp wick 3 to evaporate the fuel and sustain combustion. Air amount control device 26 during strong combustion
is in the open state (dashed line), and inside,
Since the outside air inlets 29a and 29b are wide open, sufficient air is supplied to the inner flame tube. Therefore, the fuel from the lamp wick 3 is sufficiently vaporized, and sufficient air is supplied to the primary combustion chamber 8 as well. In addition, since a large amount of air is supplied from the secondary flame port 12 toward the secondary combustion chamber 18, a uniform flame Fr.
form. Next, when the lamp wick up/down device 25 is moved to lower the exposed height of the lamp wick 3, the air amount control device 24 gradually rises in conjunction with this, and when the lamp wick 3 is set to the lowest position, the air amount The control device 26 contacts the inner cooking pan 4 . At this time, the internal air inlet 29a
Since the position facing the outside air inlet 29b is open, the air introduced into the secondary flame port 12 through the air inlet pipe 23 does not change, but the part directly below the outside air inlet 29b is bent downward so as to have a certain gap. Since it has been
Air supplied to the inner flame tube 6 from the outside air inlet 29b is considerably suppressed. Therefore, the amount of air flowing into the primary combustion chamber 8 through the air hole 11 is considerably suppressed, but at the same time, the exposed height of the lamp wick 3 is also reduced, and the amount of air flowing into the primary combustion chamber 8 through the air hole 11 below the inner flame tube 6 is reduced.
Since the amount of air supplied to the vicinity is also suppressed, the amount of fuel evaporation is also controlled at the same time, making it possible to change the amount of combustion without significantly affecting the air-fuel ratio. Therefore, the air-fuel ratio will not change and the combustion condition will deteriorate, and a large amount of CO will not be generated due to lift, back, etc. Furthermore, in weak combustion, the air introduced into the primary combustion chamber 8 from the inner flame cylinder 6 side is suppressed, so the combustion load in the primary combustion chamber 8 becomes small. Therefore, even in weak combustion, the primary combustion chamber 8
Combustion can be carried out as a whole, and a phenomenon in which the flame falls into the primary combustion chamber 8 and the upper part of the red-hot part 14 is cooled and a large amount of CO is generated can be suppressed. Further, the amount of air is controlled only from the outside air inlet 29b to the air hole 11 of the inner flame tube 6, and from the inside air inlet 29a through the air introduction path 23 to the secondary flame port. Since the amount of air supplied to air passage 12 is hardly affected, the total amount of air supplied from air passage 27 does not change significantly. Therefore, from the air passage 27 to the inner flame tube 6
The balance between the total amount of air supplied to the cylinder and the amount of air supplied from the space between the outer flame cylinder 7 and the outer cylinder 9 does not change significantly even when switching from strong combustion to weak combustion, and the combustion amount Since there is little influence, the combustion amount can be effectively adjusted and the adjustment range can be widened. Further, since the air amount control device 26 is set above the air passage 27 and near directly below the inner cooking pan 4, it is not exposed to high temperatures and there is no problem with heat resistance or corrosion resistance. Furthermore, since the lamp wick up/down device 25 is located relatively close, the transmission path for the opening/closing operation of the air amount control device 26 is also shortened, so that its operating mechanism can be made simple, accurate, and robust. Note that in the embodiment shown in FIG. 1, the air amount control device 26
Although it is bent downward so that there is a certain gap directly below, there is also an outside air inlet 29b.
The amount of air introduced into the air hole 11 of the inner flame tube can be controlled by raising and lowering a flat plate with a fixed opening at a position facing the inner flame tube, or by rotating it on the bottom surface of the inner flame tray 4, etc. It can be of any shape as long as it is of any shape.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, the following effects can be obtained.

(1) An air amount control device is installed above the air passage inside the wick inner cylinder in conjunction with the wick up/down device, so the amount of air introduced from the inner flame cylinder air hole into the primary combustion chamber during weak combustion is suppressed. However, at the same time, the exposed height of the wick is lowered, and the air introduced near the wick is also suppressed, so fuel vaporization is controlled and combustion can be maintained without significantly affecting the air-fuel ratio. Therefore, the air-fuel ratio does not change significantly, the combustion condition deteriorates, there is no lift or backlash, and a large amount of CO is not generated.

(2) Since the amount of air and the amount of vaporized fuel are controlled simultaneously, the combustion load is reduced during weak combustion, and combustion can be maintained throughout the primary combustion chamber, causing the flame to fall into the primary combustion chamber and prevent the upper part of the red-hot part from rising. cooled down
A large amount of CO is not generated, and the combustion amount can be adjusted over a wide range.

(3) The air amount control device controls only the air supplied from the inner flame cylinder air hole to the primary combustion chamber, and has little effect on the air amount supplied to the secondary flame port via the air introduction pipe. Therefore, the total amount of air supplied from the air passage 27 does not change significantly. Therefore, the balance between the total amount of air supplied from the air passage 27 and the amount of air supplied from between the outer flame cylinder and the outer cylinder does not change significantly even when switching from strong combustion to weak combustion. It is possible to effectively adjust the combustion amount, and it is effective in expanding the range of combustion amount adjustment.

(4) Since the air flow control device is located near the bottom of the inner fire pan, it does not reach high temperatures, which is advantageous for heat resistance and corrosion resistance. Furthermore, since it can be installed near the wick up/down device, the operating mechanism can be simple, accurate, and robust.

[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 conventional combustion device. 1... Core inner tube, 2... Core outer tube, 3... Light wick, 6
...Inner flame tube, 7...Outer flame tube, 8...Primary combustion chamber,
9...Outer cylinder, 11...Air hole, 12...Secondary flame port, 17...Transmission tube, 23...Introduction pipe, 25...
Light wick up/down device, 26...Air amount control device.

Claims (1)

[Claims] 1. A cylindrical wick inner tube and an outer wick tube, a lamp wick that is vertically movably mounted between the inner wick tube and the outer wick tube, a wick up/down device that changes the height of the wick, and the inner wick tube. and an inner flame tube and an outer flame tube each having a large number of air holes placed on the upper end of the core outer tube,
An outer cylinder set outside the outer flame cylinder, a transmission cylinder placed above the outer cylinder, and an inner flame at the upper end of the primary combustion chamber formed between the inner flame cylinder and the outer flame cylinder. An introduction pipe provided inside the inner flame tube for introducing air into a secondary flame port provided in the tube, and an inlet pipe provided inside the inner flame tube, located at the upper part of the air passage inside the wick inner tube and interlocked with the wick up/down device. A combustion device comprising an air amount control device that controls the amount of air supplied to the air hole of the inner flame cylinder.