JP2666517B2 - Combustion equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an up-and-down core type combustion device used for home heating and the like.

2. Description of the Related Art In general, an up-and-down type combustion device has a problem that excess fuel vaporized from the tip of a light core at the time of fire extinguishing is thermally decomposed in a high-temperature combustion cylinder to generate odor.

Therefore, in order to reduce the odor, there has recently been proposed a method in which a suction means such as a fan is operated to suck excess fuel into a tank and then discharge the fuel to the outside.

However, this type of combustion apparatus has a problem that odor is generated even at the time of ignition, and since the odor at the time of extinguishing is reduced by the above suction means, dissatisfaction with the odor at the time of ignition is increased, and a solution to the problem is desired. As one means for solving this problem, there has been proposed a method in which the suction means is operated even at the time of ignition to reduce odor.

FIG. 5 shows a combustion apparatus having such suction means.
Is an oil tank, 21 is a core guide cylinder erected on the oil tank 20, 22 is a core outer cylinder fixed on the oil tank 20, 23 is a core housing formed by the core guide cylinder 21 and the core outer cylinder 22, 24 Is the core storage part 23
Is a core that moves up and down. Reference numeral 25 denotes a wick raising / lowering mechanism, which moves the wick 24 up and down, exposing the tip of the wick 24 to the lower end of a combustion tube 26 mounted on the wick guide tube 21 and the wick outer tube 22 to perform combustion. Numeral 27 denotes an absorbing means which operates at the time of ignition and fire extinguishing. The fan 29 is rotated by a motor 28 to suck and exhaust the inside of the oil tank 20 from a suction port 30 of the oil tank 20. 31 is a cartridge tank.

In the above configuration, when the wick 24 is appropriately exposed to the inside of the combustion cylinder 26 by operating the wick vertical mechanism 25 and ignited, the wick 24 is burned in the combustion cylinder 26 to enable heating. When the lead vertical movement mechanism 25 is operated in the opposite direction, the lead 24 enters the lead receiving portion 23 to a predetermined position and extinguishes the fire. At the time of ignition and extinguishing, a switch (not shown) which is turned on and off by the core raising / lowering mechanism 25 is turned on, the suction means 27 is operated for a certain period of time, and unburned combustion which is going to flow out through the combustion cylinder 26 to the outside by the draft. Ingredients for oil tank 20
The odor is reduced by sucking into the inside and discharging it to the outside through the exhaust port 32 without thermal decomposition.

However, in the above-described conventional apparatus, the gap formed between the core 24 and the core guide cylinder 21 or between the core 24 and the core outer cylinder 22 of the core accommodating portion 23, which is a suction path at the time of suction, is It varies depending on the thickness, diameter, etc. of 24, and also depends on the degree of roundness of the core guide cylinder 21, the core 24, and the core outer cylinder 22, and particularly on the degree of eccentricity when the core outer cylinder 22 is fixed to the oil tank 20. Because of the fluctuation, the flow path resistance of the suction path changes, causing a difference in the suction amount, and an appropriate suction amount cannot be obtained. That is, at the time of ignition, suction is performed during ignition combustion, and as with fire extinguishing, the effect is not obtained simply by suctioning, but the amount of fuel vaporization from the wick 24 is larger than at the time of fire extinguishing, so the suction amount is excessive. Then, the vaporized gas sucked into the oil tank 20 may be discharged from the exhaust port 32 to generate white smoke. Further, since the amount of vaporized combustion is suppressed by excessive suction, the rise of combustion is delayed, and combustion failure may occur due to cooling of the flame or the like, and on the contrary, odor may be generated. Conversely, when the suction amount is too small, there is a problem that the odor is not sufficiently reduced.

The present invention has been made in view of such a conventional problem, and has as its object to obtain a combustion device that significantly reduces odor at least during ignition or fire extinguishing.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention includes suction means for sucking and discharging fuel gas from a gap between the wick accommodating portions via an oil tank, and a lower portion of the wick accommodating portion. The suction means is provided with a protruding ring on at least one of the core outer cylinder and the core guide cylinder to form a narrow portion, and at least one portion of the narrow portion forms a suction path having a larger suction amount than the other portion. The suction means is set to operate at least at the time of ignition or extinguishing.

With the above configuration, the combustion device of the present invention forms a narrow portion by providing a protruding ring below the gap between the core accommodating portions and forms a suction passage in at least one portion of the narrow portion where the suction amount is larger than that of the other portion. To reduce the suction by the suction means to generate white smoke due to an excessive suction amount at the time of ignition caused by a change in the flow path resistance in the gap of the core receiving portion, to generate odor due to poor combustion, and to reduce the suction amount. As a result, it is possible to stably secure an optimal suction amount, so that the odor at the time of ignition can be significantly reduced.
Further, also at the time of fire extinguishing, the odor at the time of fire extinguishing can be effectively reduced.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 is an oil tank, 2 is a core guide cylinder erected on the oil tank 1, 3 is a core outer cylinder fixed on the oil tank 1, 4 is a core housing formed by the core guide cylinder 2 and the core outer cylinder 3, Numeral 5 is a core that moves up and down in the core accommodating portion 4. Reference numeral 6 denotes a protruding ring provided in the core housing portion 4 below the core outer cylinder 3, and forms a narrow portion 7 below the core housing portion 4. Reference numeral 8 denotes a suction path provided in at least one portion of the narrow portion 7 so as to stabilize the suction by the suction means because the suction amount is larger than that of the other portion. An inner fire tray 9 is disposed above the core guide cylinder 2, and an outer fire tray 10 is disposed above the core outer cylinder 3. Numeral 11 is a lead-up / down mechanism, which moves the lead 5 up and down so that the upper end of the lead 5 is appropriately exposed above the inner fire tray 9 and the outer fire tray 10. Reference numeral 12 denotes a combustion tube, which is placed on the inner fire plate 9 and the outer fire plate 10 and configured to perform combustion therein. Reference numeral 13 denotes suction means for sucking and exhausting the inside of the oil tank from the suction port 14 of the oil tank 1. The suction means 13 is a turbo fan for sucking the inside of the oil tank 1.
15 and a motor 16 for rotating the turbo fan 15
And a valve 17 which is opened by wind force when the turbo fan 15 rotates and sucks and exhausts the inside of the oil tank 1. 18 is the exhaust port, 19
Is a cartridge tank.

In the above configuration, the wick 5 is exposed to a suitable size on the inner fire tray 9 and the outer fire tray 10 by operating the wick raising / lowering mechanism 11 and ignited.
It is possible to burn inside and warm up. At the time of this ignition, the suction means 13 operates for a certain time, and its effect will be described.

At the time of ignition, it is completely different from that at the time of fire extinguishing, in the process of igniting and starting combustion, the amount of fuel vaporization sharply increasing, the flame rising and gradually going to stable combustion, just suctioning like fire extinguishing If this is the case, no effect can be obtained, and it is extremely important to set a suction amount that can obtain a sufficient effect without adversely affecting combustion. Suction amount is suction means
It is determined by the flow path resistance of the suction path together with the capacity setting of 13. Here, the flow path resistance is governed by a gap formed between the core 5 and the core outer cylinder 3 and between the core 5 and the core guide cylinder 2 which are the narrowest portions in the suction path. This gap varies depending on the thickness and diameter of the core 5, and the roundness of the core guide cylinder 2, the core 5, and the core outer cylinder 3, and the eccentricity when the core outer cylinder 3 is fixed to the oil tank 1. Because it varies depending on the degree,
The flow path resistance of the suction path changes, causing a difference in the suction amount, which causes a problem as in the conventional example. However, as a result of studying this point, FIG. 2 (a is an enlarged view of a main part of FIG. 1, and b is A-
As shown in the cross-sectional view of line A), a protruding ring 6 is provided on the lower core outer cylinder 3 of the core accommodating portion 4 to form a narrow portion 7, and the suction amount is larger in at least one portion of the narrow portion 7 than in other portions. It has been clarified that providing the suction passage 8 having a wide gap so as to stabilize suction by means has a large odor reduction effect without the above-mentioned disadvantages. That is, the suction path 8 has a smaller flow path resistance than the narrow portion 7 formed by the protruding ring 6 of the core receiving portion 4 and has a larger suction amount than the other portion. Even if the gap of the lead accommodating portion 4 fluctuates due to the difference, etc., a substantially constant amount of suction can always be obtained from the suction path 8. Further, even if the gap of the core receiving portion 4 fluctuates due to the degree of roundness of the core guide cylinder 2, the core 5, and the core outer cylinder 3, or the case where the core outer cylinder 3 is eccentrically fixed to the oil tank 1, the suction path 8. Approximately a constant amount of suction can be performed from the. And the core outer cylinder 3 when fixed to the oil tank 1 by the projecting ring 6
Becomes smaller. Therefore, it is not necessary to suppress the suction amount to avoid the generation of white smoke due to the excessive suction amount caused by the fluctuation of the gap of the core accommodating portion 4 and the odor due to poor combustion, and it is not necessary to suppress the suction amount, thereby reducing the odor due to the small suction amount. Since the effect can be prevented from lowering and the optimum suction amount can be stably secured, the odor at the time of ignition can be significantly reduced. Further, by operating the suction means 13 at the time of fire extinguishing, the odor at the time of fire extinguishing can also be effectively reduced at the time of fire extinguishing.

FIG. 3 shows the results of measuring the state of odor generation at the time of ignition. The ordinate shows the hydrocarbon (HC) concentration as an index of odor, and the abscissa shows the elapsed time after ignition. Suction means at ignition 13
Is not operated, the generation state of HC is as shown by curve A. In curve A, the odor at the time of ignition is roughly divided into two peaks. The peak is a sharp peak generated at the time of the ignition just after ignition, and is a strong pungent odor. The peak is a relatively gentle beak in the process of gradually rising to a stable combustion after the flame rises, and not a pungent odor but a long lasting one, so that a large amount of odor is felt. A curve B is an HC generation curve when the suction means 13 is operated at the time of ignition in this embodiment. In both the peaks and the peaks of the curve A, HC is significantly reduced, and the odor reduction effect at the time of ignition is apparent. FIG. 4 shows a core guide cylinder 12 according to the present invention, in which a protruding ring 6 is provided to form a narrow portion 7, and a narrow portion 7 is formed.
The suction path 8 is formed in at least one place to stabilize the suction by the suction means because the suction amount is larger than the other part, and the same effect as described above can be obtained. Of course, the present invention is not limited to this configuration as long as the objects and effects of the present invention are achieved.

Effect of the Invention As described above, according to the combustion apparatus of the present invention, the suction device for suctioning and exhausting the combustion gas from the gap of the wick accommodating portion through the oil tank is provided. At least one of the guide cylinders is provided with a protruding ring to form a narrow portion, and at least one portion of the narrow portion forms a suction path having a larger suction amount than the other portion to stabilize suction by the suction means. Since the suction means is set to operate at least at the time of ignition or fire extinguishing, the thickness and diameter of the core, the roundness of the core guide cylinder, the core, the core outer cylinder, and the core outer cylinder are fixed to the oil tank. Due to the degree of eccentricity at the time of ignition, the amount of suction at the time of ignition caused by the change in the flow path resistance of the gap of the core accommodating part causes the generation of white smoke and the generation of odor due to poor combustion,
In addition, we prevent deterioration of odor reduction effect by too small amount of suction,
Since the optimal suction amount can be stably secured, the odor at the time of ignition can be significantly reduced. Further, also at the time of fire extinguishing, the odor at the time of fire extinguishing can be effectively reduced. With the above effects, the comfort of the up-down type combustion device can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a combustion device according to an embodiment of the present invention,
2a is an enlarged view of a main part of the combustion apparatus, FIG. 2b is a cross-sectional view taken along the line AA of FIG. 2a, FIG. 3 is a characteristic diagram showing an odor generation situation, and FIG. FIG. 5 is a cross-sectional view of a conventional combustion device, showing a main part of a combustion device in another embodiment. 1 ... oil tank, 2 ... core guide cylinder, 3 ... core outer cylinder, 4 ...
... Lead receiving part, 5... Lead, 6...
8 ... suction path, 13 ... suction means.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-119323 (JP, A) JP-A 62-52711 (JP, U) JP-A 61-204126 (JP, U)

Claims (1)

(57) [Claims] 1. An oil tank having a core receiving portion formed by a core outer cylinder and a core guide cylinder, a core disposed in the core receiving portion so as to be vertically movable, and installed in a part of the oil tank. Suction means for sucking and discharging the fuel gas from the gap of the core accommodating portion via the inside of the oil tank, and a lower portion of the core accommodating portion projects annularly in at least one of the core outer cylinder and the core guide cylinder. Is provided to form a narrow portion, and a suction path in which the suction amount is larger than that of the other portion is formed in at least one portion of the narrow portion to stabilize the suction by the suction means, and the suction means is at least at the time of ignition. Or a combustion device set to operate when the fire is extinguished.