JPH046306A - Combustion device - Google Patents

Abstract

PURPOSE:To sharply reduce a smell generated during ignition by a method wherein, in a wick elevation type device used for heating for a domestic use, a suction passage having a suction amount higher than that of other part is disposed in the gap of a wick containing part and in the vicinity of the ignition position of a wick tip part, and operation is also effected during ignition of a suction means. CONSTITUTION:A suction passage 4a increasing a gap so as to increase a suction amount to a value higher than that of other part is located at least in one spot of the gap of a wick containing part 4. The suction passage 4a is disposed below a position in the vicinity of an ignition position 5a at the tip part of a wick 5. Through operation of a wick elevating mechanism 9, a wick 5 is exposed by a proper size from inner and outer fire grates 7 and 8, and ignition is carried out in an ignition position 5a at the tip part of the wick 5 by means of an ignition means 6. Combustion is effected in a combustion cylinder 10. During ignition, a suction means 11 is operated during a specified time. The suction passage 4a has flow rate resistance reduced to a value lower than that of another part of the gap of the wick containing part 4, and suction amount is relatively increased to a value higher than that of mother part. Even when the gap of the wick containing part 4 is peripherally uneven, uniform suction of constantly approximately specified amount through the passage 4a is practicable.

Description

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

Conventional technology-i has a problem in that the wick-up-and-down type combustion apparatus has the problem that surplus fuel that vaporizes from the tip of the wick when extinguishing a fire is thermally decomposed in the high-temperature combustion tube, producing an odor.

Recently, in order to reduce this odor, a system has been proposed in which a suction means such as a fan is operated to suck excess fuel into the tank and then release it to the outside.

However, this type of combustion device has the problem of generating odor even when ignited, and since the above-mentioned suction means has reduced the odor during extinguishing, dissatisfaction with the odor during ignition has increased, and a solution is desired. As a means to solve this problem, a method has been proposed in which the suction means is activated even when igniting, thereby reducing odor.

Fig. 5 shows a combustion device having such a suction means, with an 18
is an oil tank, 19 is a core guide tube installed in the oil tank 18,
20 is a core outer cylinder fixed on the oil tank 18; 21 is a core housing portion formed by the core guide cylinder 19 and the core outer cylinder 20; 22
is a core that moves up and down in this core housing portion 21.

Reference numeral 23 denotes a wick up-and-down mechanism that moves the wick 22 up and down to expose the tip of the wick 22 to the lower end of the combustion tube 24 placed on the core guide tube 19 and the core outer tube 20 for combustion.

Reference numeral 25 denotes a suction means that operates when igniting and extinguishing a fire, and a motor 26 rotates a fan 27 to draw oil from the oil tank 18.
The inside of the oil tank 18 is sucked and exhausted from the suction port 28 of the oil tank 18. 29 is a cartridge tank.

In the above configuration, when the wick up-and-down mechanism 23 is operated to expose the wick 22 to an appropriate length into the combustion tube 24 and ignite it, the wick 22 is burned in the combustion tube 24 and it becomes possible to collect heat. And the core up and down mechanism 23
If the wick 22 is operated in the opposite direction, the wick 22 will be inserted into the wick housing part 2 to a predetermined position and the fire will be extinguished. A switch (not shown) that is turned ON and OFF by the wick up and down mechanism 23 when igniting and extinguishing the ignition is OFF.
NL, the suction means 25 is operated for a certain period of time, and the unburned components of the fuel that are about to flow out through the combustion tube 24 to the outside by draft are sucked into the oil tank 18, and are released from the exhaust port 30 to the outside without being thermally decomposed. Reduces odors by emitting

Problems to be Solved by the Invention However, in the above-mentioned conventional device, the core 22 and the core guide tube 19 of the core accommodating portion 21, which serve as the suction path during suction, and the core 22 and the core outer tube 2
The gap formed between the core guide cylinder 19. It varies depending on the degree of circularity of the core 22 core outer cylinder 20 and the degree of eccentricity when fixing the 8 m20 outer cylinder to the oil tank 18, resulting in non-uniformity in the circumferential direction, so it is difficult to keep the flow resistance of the suction path constant. It was difficult to obtain an appropriate amount of suction due to differences in the amount of suction in the circumferential direction, and there were the following problems. In other words, at the time of ignition, suction is performed during ignition and combustion, and the effect is not obtained by simply suctioning, as in the case of extinguishing the fire.The flame ignited at a portion of the tip of the wick 22 spreads around the entire circumference of the tip of the wick 22. The rotation completes the fire cycle, and then a flame rises inside the combustion tube 24.
The suction is during an unstable transition period as it gradually moves toward stable combustion, and if the suction is not appropriate, it may have an adverse effect on combustion and even generate odor.

Let me explain this situation in a little more detail. In Figure 6,
32 is a gap formed between the core 22 and the core guide tube 19; 33
is a gap formed between the core 22 and the core outer cylinder 20. Then, the core outer cylinder 20 is eccentrically moved in the direction of the white arrow A, and the oil tank 18
This shows the case where it is fixed to . The gap 32 is non-uniform in the circumferential direction, being narrower on the ignition heater 31 side and wider on the opposite side. Here, the wick 2 is heated by the ignition heater 31.
The flame ignited at a part of the tip of 2 is indicated by black arrows a and b.
The flames a and b meet on the opposite side of the ignition heater to complete the fire rotation, and then the combustion tube 24
A flame rises inside the combustion chamber and gradually progresses to stable combustion, but in this case, the flow resistance of the suction path is smaller on the ignition heater 31 side.
The side where the fire is completed is larger, and the amount of suction on the side where the fire is completed is larger than that of the ignition engine 31.

The state of the flame during heating is largely stabilized on the ignition heater 31 side, and the flame at the tip of the heating is small and unstable. On the completion side of a small and unstable flame, the amount of suction becomes excessive and the amount of vaporized combustion is suppressed, resulting in a slow start of combustion, which causes poor combustion due to flame cooling, etc. On the other hand, if the amount of suction is suppressed to avoid an adverse effect on combustion, there is a problem in that the odor is not sufficiently reduced.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a combustion device that can significantly reduce at least the odor at the time of ignition.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention includes a suction means for sucking and exhausting fuel gas from the gap in the wick accommodating part through the inside of the oil tank, and a suction means in the gap in the wick accommodating part. A suction path is formed in at least one part so that the amount of suction is larger than in other parts, and the suction path is disposed below the tip of the wick near the ignition position, and the suction means is activated at least when ignited. It is set as follows.

Operation The combustion device of the present invention has the above-mentioned configuration, which prevents the generation of odor due to the adverse effect on combustion caused by suction during the unstable transient process from ignition to stable combustion, and suppresses the amount of suction to prevent odor from occurring due to the adverse effect on combustion. Since it is possible to prevent the reduction effect from decreasing and to perform appropriate suction, the odor at the time of ignition can be stably and significantly reduced. Further, by operating the suction means even when the fire is extinguished, the odor during the fire extinguishment can be effectively reduced.

Example An example of this will be described below with reference to FIGS. 1 to 4.

1 is an oil tank, 2 is a core guide tube installed in the oil tank 1, 3
Reference numeral 4 designates a core outer cylinder fixed on the oil tank l, 4 a core accommodating portion formed by the core guide cylinder 2 and the core outer cylinder 3, and 5 a core that moves up and down within this 8 accommodating portion 4. Reference numeral 4a denotes a suction path provided in at least one part of the gap between the core outer cylinder 3 and the core 5 of the lead accommodating part 4 so that the amount of suction is larger than in other parts. Reference numeral 6 denotes an ignition means that ignites a part of the tip of the wick 5 using an electric heater or the like. The suction path 4a is arranged below the ignition position 5a of the tip of the wick 5 facing the ignition means 6. An inner fire pan 7 is disposed above the core guide cylinder 2, and an outer fire pan 8 is disposed above the core outer cylinder 3. 9 is a wick up-and-down mechanism that moves the wick 5 up and down to raise and lower the inner fire pan 7. The structure is such that the upper end of the wick 5 is exposed to an appropriate extent above the outer fire pan 8. 10 is a combustion cylinder, and an inner fire pan 7.
It is placed on the outer fire pan 8 and is configured to be burned inside. Reference numeral 11 denotes a suction means for suctioning and exhausting the inside of the oil tank 1 through the suction port 12 of the oil tank 1. This suction means 11 includes a turbo fan 13 for suctioning the inside of the oil tank 1, a motor 14 for rotating the turbo fan 13, and a motor 14 for rotating the turbo fan 13.
It consists of a valve 15 that opens due to the wind force when suctioning and exhausting the inside. 16 is an exhaust port, and 17 is a cartridge tank.

In the above configuration, the wick 5 is moved to the inner fire pan 7 by operating the wick up/down mechanism 9. When a suitable amount of the wick is exposed on the outer fire pan 8 and ignited by the ignition means 6 at the ignition position 5a at the tip of the wick 5, it burns in the combustion tube 10 and it becomes possible to collect heat. At the time of this ignition, the suction means 1
will operate for a certain period of time, and its effects will be explained below.

When igniting something, it is completely different from when extinguishing it; suction is carried out during the unstable transitional process from ignition to stable combustion.Simply suctioning is not as effective as when extinguishing a fire, but can have a negative effect on combustion. It is extremely important to set up an appropriate suction method that can obtain sufficient effects without any problems. The amount of suction is determined by the capacity setting of the suction means 11 and the resistance of the suction path. Here, the flow path resistance is between the core 5 of the core accommodating section 4 and the core guide tube 2, which are the narrowest parts in the suction path.
and the gap formed between the core 5 and the core outer cylinder 3. This gap is defined by the core guide tube 2. Core 5. The degree of circularity of the outer core tube 3 and the degree of eccentricity when fixing the outer core tube 3 to the oil tank 1 also vary, resulting in non-uniformity in the circumferential direction, making it difficult to keep the flow resistance of the suction path constant. This creates a difference in the amount of scolding depending on the direction, causing the same problems as in the conventional example. However, as a result of considering this point, as shown in Figure 2 (a is an enlarged view of the main part of Figure 1, b is a cross-sectional view taken along the line AA), at least one part of the gap in the lead accommodating part 4 has a larger amount of suction than other parts. Providing a suction path 4a with a wider gap and arranging this suction path 4a below near the ignition position 5a at the tip of the wick 5 eliminates the above-mentioned problems and has the effect of reducing odor. It became clear that it was big. In other words, the suction path 4a has a lower flow path resistance than other parts of the gap in the lead accommodating part 4, and the suction amount is relatively larger than that in other parts, so the gap in the wick accommodating part 4 is non-uniform in the circumferential direction. Even when the amount of water is reduced, a substantially constant amount of suction can always be obtained from the suction path 4a. As explained in FIG. 6 of the conventional example,
Even when the outer core cylinder 3 is eccentrically fixed to the oil tank 1, the amount of suction does not become excessive on the side where the heating is complete, resulting in poor combustion and no longer causing odor. . On the other hand, the amount of suction in the lower suction path 4a near the ignition position 5a is larger than in other parts, but in the vicinity of the upper ignition position 5a, there is an ignition source for the ignition means 6 at the time of ignition, and the flame grows immediately after ignition. Since it is greatly stabilized, even if the amount of suction is large, it is hardly affected by it, and poor combustion will not occur. In addition, there is no need to suppress the amount of suction to avoid adverse effects on combustion, and even if the gap in the wick housing section 4 fluctuates and becomes uneven in the circumferential direction, appropriate suction can be stably ensured to ignite the ignition. odor can be significantly reduced. Further, by operating the suction means II when extinguishing a fire, it is possible to effectively reduce the odor at the time of extinguishing the fire.

FIG. 3 shows the results of measuring the state of odor generation during ignition. The vertical axis shows the hydrocarbon (HC) concentration as an odor index, and the horizontal axis shows the elapsed time after ignition. Suction means 1 during ignition
1 is not activated, the HC generation state is as shown by curve A. In curve A, the odor at the time of ignition is roughly divided into two peaks. Peak ■ is a sharp peak and a strong pungent odor that occurs when the fire is spinning immediately after ignition. Peak ■ is a relatively warm peak in the process of the flame rising and gradually moving toward stable combustion, and although it is not an irritating odor, it lasts for a long time and causes a lot of odors. Curve B is the HC generation curve when the suction means 11 is operated at the time of ignition in this embodiment.

HC was significantly reduced at both peaks ■ and peak ■ of curve A, and the odor reduction effect upon ignition was obvious.

Figures 4a, b, and c show other embodiments of the present invention, in which the thickness of the wick 5 is made smaller so that the amount of suction is larger than that of other parts. Of course, it is not limited to this i configuration as long as it achieves the purpose and effect.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, there is provided a suction means for sucking and exhausting combustion gas from the gap in the wick accommodating part through the inside of the oil tank, and another part in at least one place in the gap in the wick accommodating part. A suction path is formed so that the amount of suction is larger than that of the wick, and this suction path is arranged below near the ignition position 1 at the tip of the wick,
Since the suction means is set to operate at least at the time of ignition, the gap in the lead accommodating part is determined by the degree of roundness of the lead guide tube, the core, and the outer core tube, and the degree of eccentricity when fixing the core outer tube to the oil tank. Occurrence of odor due to adverse effects on combustion caused by suction during the unstable transient process from ignition to stable combustion when fluctuations occur due to fluctuations in the circumferential direction, and the amount of suction is This prevents the odor reduction effect from deteriorating and ensures stable and appropriate suction, making it possible to significantly reduce the odor at the time of ignition. Further, even when the fire is extinguished, the odor at the time of fire extinguishing can be effectively reduced as well. Due to the above effects, the comfort of the wick type combustion apparatus can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a combustion device according to an embodiment of the present invention, FIG. 3 is a characteristic diagram showing the state of odor generation, FIGS. 4a and 4b are sectional views of main parts of a combustion device according to another embodiment of the present invention, FIG. 5 is a sectional view of a conventional combustion device, and FIG. The figure is a sectional view illustrating the operation of the combustion device. 1... Oil tank, 2... Core guide tube, 3
... Core outer cylinder 14 ... Core housing part, 4a.
... Suction path, 5 ... Core 5a ...
Ignition position, 6... Ignition means, 11...
・Suction means. Name of agent Patent attorney Shigetaka Awano 1 person Figure 1 Uyutareku foot, guide cylinder Fig. fig. fig.

Claims (1)

[Claims] an oil tank having a core accommodating section formed by a core outer cylinder and a core guide tube; a wick disposed in the wick accommodating section so as to be movable up and down; an ignition means for igniting a tip end of the wick; A suction means for sucking and exhausting fuel gas from the gap in the core accommodating part through the inside of the tank, and a suction path formed in at least one part of the gap in the wick accommodating part so that the amount of suction is larger than in other parts. The combustion device further comprises: the suction passage disposed below the tip of the wick in the vicinity of the ignition position, and the suction means set to operate at least at the time of ignition.