JP2712731B2 - 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. 7 shows a combustion apparatus having such suction means.
Is an oil tank, 29 is a core guide cylinder erected on the oil tank 28, 30 is a core outer cylinder fixed on the oil tank 28, 31 is a core gap formed by the core guide cylinder 29 and the core outer cylinder 30, 32 is a core gap. The core moves vertically in the core gap 31. Reference numeral 33 denotes a core vertical movement mechanism, which moves the core 32 up and down, and a combustion cylinder mounted on the core guide cylinder 29 and the core outer cylinder 30.
The tip of the wick 32 is exposed at the lower end of the, and combustion is performed. Reference numeral 35 denotes suction means which operates at the time of ignition and fire extinguishing. The suction means 35 rotates a fan 37 by a motor 36 to suck and exhaust the inside of the oil tank 28 from a suction port 38 of the oil tank 28. 39 is a cartridge tank.

In the above configuration, when the wick 32 is appropriately exposed and ignited in the combustion cylinder 34 by operating the wick raising / lowering mechanism 33, the wick 32 is burned in the combustion cylinder 34 and can be heated. Then, when the lead lifting mechanism 33 is operated in the opposite direction, the lead 32 sinks into the lead gap 31 to a predetermined position and extinguishes the fire. At the time of this ignition and fire extinguishing, it is turned on by the core lifting mechanism 33,
A switch (not shown) that is turned off is turned on, and the suction means 35 is turned on.
Operates for a certain period of time, and the unburned components of the fuel that are going to flow out through the combustion
The odor is reduced by sucking the gas into the air outlet 28 and discharging it to the outside through the exhaust port 40 without thermal decomposition.

The control device of such a suction means was configured as shown in FIG. When the wick 32 is raised by operating the wick vertical mechanism 33, the ignition timer 42 is started through the contact point of the switch 41 interlocked with the wick vertical mechanism 33, a drive permission signal is output to the motor drive circuit 43, and the motor 36 It rotates and performs odor operation. After a certain period of time, the ignition timer 42 is turned off and the motor 36 stops.

Next, when the wick 32 is lowered by operating the wick vertical mechanism 33 and the fire is extinguished, a fire-extinguishing timer 44 is started through the contact of the switch 41, a drive permission signal is output to the motor drive circuit 43, and the motor 36 starts rotating. To perform the odor absorbing operation. When a certain time has elapsed, the fire extinguishing timer 44 is turned off and the motor 36 stops.

However, in the above-described conventional apparatus, when the suction means 35 is operated simply at the time of ignition as in the case of fire extinguishing, the battery voltage is directly applied to the suction means 35, so that the ability of the suction means 35 is controlled. Therefore, it is difficult to obtain an air volume appropriate for the odor-absorbing operation at the time of ignition. That is, when the ignition is performed, the amount of fuel vaporized from the tip of the wick 32 is larger than that at the time of extinguishing.If the capacity of the suction means 35 is too large, the vaporized gas sucked into the oil tank 28 is discharged from the exhaust port 40 to generate white smoke. There was a case. Further, since the amount of fuel vaporized is suppressed by the suction, the rise of combustion is delayed, and combustion failure occurs due to cooling of the flame or the like, and on the contrary, odor may be generated. Conversely, when the capacity of the suction means 35 is small, there is a problem that the odor is not sufficiently reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its first object to obtain a combustion device that significantly reduces odor at the time of ignition.

The object of FIG. 2 is to obtain a combustion device which significantly reduces not only the odor at the time of ignition but also the odor at the time of fire extinguishing.

A third object is to provide a combustion apparatus having an effective odor reducing means that matches the situation of generation of odor at the time of ignition.

Means for Solving the Problems In order to achieve the first object, the present invention provides a method of sucking and exhausting a fuel gas from an upper portion of a lamp core through an oil tank against a heat draft at the time of ignition, An odor reducing means for reducing the suction capacity after that, and stopping the suction after the flame is stabilized is provided.

Further, in order to achieve the second object, the present invention provides a method of sucking and discharging fuel gas from an upper part of a lamp core through an oil tank at the time of ignition, and making the suction capacity thereafter smaller than the suction capacity immediately after ignition. The odor reducing means for stopping the suction after the stabilization is provided, and the same odor reducing means is operated at the time of fire extinguishing.

Further, in order to achieve the third object, the voltage applied to the odor reducing means at the time of ignition is increased immediately after ignition, and the applied voltage thereafter is decreased stepwise to stop after flame stabilization.

According to the present invention, the combustion device having the above-described configuration suppresses a sudden increase in the concentration of combustion gas in the combustion chamber immediately after ignition, and introduces air into the combustion chamber to promote mixing and combustion of fuel and air and ignite. The odor at the time can be greatly reduced. Further, by gradually reducing the voltage applied to the odor reducing means, it is possible to prevent the generation of white smoke due to excessive suction and the deterioration of odor due to insufficient rising of the flame. Furthermore, the odor at the time of fire extinguishing can also be effectively reduced by using the same odor reducing means at the time of fire extinguishing.

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 gap formed by the core guide cylinder 2 and the core outer cylinder 3, and 5 is a core gap 4
A core that moves up and down inside. An inner fire plate 6 is provided above the core guide tube 2, and an outer fire plate 7 is provided above the core outer tube 3. 8
Is a wick raising / lowering mechanism, which moves the wick 5 up and down so that the upper end of the wick 5 is appropriately exposed above the inner fire plate 6 and the outer fire plate 7. Numeral 9 denotes a combustion tube, which is placed on the inner fire plate 6 and the outer fire plate 7 so as to perform combustion therein. Reference numeral 10 denotes odor reducing means for sucking and exhausting the inside of the oil tank 1 from the suction port 11 of the oil tank 1. This odor reduction means
10 is a turbo fan 12 for sucking the inside of the oil tank 1,
The motor 13 includes a motor 13 for rotating the turbofan 12 and a valve 14 that is opened by wind force when the turbofan 12 rotates and sucks and exhausts the oil tank 1. 15 is an exhaust port, and 16 is a cartridge tank.

In the above configuration, the wick 5 is exposed to an appropriate size on the inner fire tray 6 and the outer fire tray 7 by operating the wick raising / lowering mechanism 8 and ignited.
In this case, it becomes possible to burn and warm up. The odor reducing means 10 operates at the time of this ignition, and its effect will be described.

FIG. 2 shows an odor generation state 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. When the odor reducing means 10 is not operated at the time of ignition, the generation state of HC is as shown by a curve A. In the curve A, the odor at the time of ignition is roughly divided into two peaks. One is a sharp peak that occurs at the time of the fire just after ignition, and the other is a relatively gentle shoulder-like peak thereafter. The peak is a strong pungent odor, but attenuates in a short time, whereas the peak has a lower HC level than the peak but continues for a long time, so that the odor is felt strongly.

This situation will be described in more detail. In FIG.
Outer flame tubes 17 and 18 constituting the combustion tube 9 are placed on the inner fire plate 6 and the outer fire plate 7, respectively. 19 is the inner flame cylinder, 17 is the outer flame cylinder
In the combustion chamber formed between 18, the tip of the light core 5 is exposed to the combustion chamber 19 of an appropriate size and the combustion is continued. 20 is the inner and outer flame tube 17,1
A large number of air holes are provided in the combustion chamber 1 through the air holes 20.
Combustion air is supplied into 9. When the wick 5 is raised by the wick vertical mechanism 8 and the ignition heater 21 is brought close to the vicinity of the wick 5 and ignited, combustion starts. Normally, in a wick up-and-down type combustion device, the wick 5 has a cylindrical shape, and after the ignition, the flame turns around in a circumferential manner to complete the fire. In the middle of the fire, fuel is always vaporized from the front end of the flame, and the vaporized gas from the front end of the flame passes through the combustion chamber 19 without being burned and is released into the atmosphere, and this is a strong pungent odor. Becomes After the completion of the fire, the amount of fuel vaporized increases and the flame rises, gradually leading to stable fuel.
The fuel gas suddenly increases inside, but the rise of the draft force is insufficient, so that the air supply from the outer flame cylinders 17 and 18 becomes insufficient, resulting in insufficient mixing and flame. The inner and outer flame tubes 17 and 18 come into contact with the wall surfaces and are cooled to generate odors because combustion does not proceed efficiently. This odor continues until the flame rises and the combustion cylinder becomes hot, and reaches stable combustion in a few minutes. This appears as a peak odor.

Therefore, in order to suppress the odor at the time of ignition, both the peak and the peak must be effectively reduced.
As a conventional method, there is an example in which the suction means 35 is used at the time of ignition as well as at the time of fire extinguishing. However, unlike the case of fire extinguishing, unlike the case of fire extinguishing, the combustion starts and the amount of fuel vaporized sharply increases.
It is difficult to obtain a sufficient effect by operating. For example, in order to suppress a strong peak irritating odor,
Must be increased, but when operated at a constant voltage with a high capacity, problems as in the prior art occur. However, as a result of a detailed study on this point, as shown in FIG. 4, the suction pattern in which the suction capacity after the ignition operation is smaller than the suction capacity immediately after the ignition operation does not have the above-described disadvantages and has a large odor reduction effect. It became clear. In order to realize such a suction pattern, as shown in FIG. 5, the voltage applied to the motor 13 is set to a high voltage (V1) for a certain time (t1) after the ignition operation, and then gradually to a low voltage (V2). It was found that a method of reducing the voltage and stopping the suction after the flame was stabilized was effective.

That is, a strong irritating odor corresponding to the peak in FIG. 2 is sucked with high capacity, and the sucking capacity is reduced at the time of the following shoulder-shaped peak, thereby generating a white flame due to excessive suction or worsening the odor due to insufficient rising of the flame. Odor reduction effect can be maximized. With this odor reducing means, the odor (HC) at the time of ignition can be significantly reduced as shown by the curve B in FIG.

The mechanism of ignition odor reduction when the odor reduction means 10 is operated will be described. At the time of ignition, the fuel is always vaporized from the flame tip as described above.
When 10 is activated, the pressure inside the oil tank 1 is reduced,
The fuel gas vaporized from the front end of the flame is sucked into the oil tank 1 through the gap between the core guide cylinder 2 and the core outer cylinder 3. Therefore, the vaporized gas directly emitted into the atmosphere without burning (corresponding to the peak of the curve A) is greatly reduced.
When the flame rises, the odor reducing means 10
, The rapid increase in fuel concentration in the combustion chamber 19 is suppressed, and air is supplied from the inner and outer flame tubes 17, 18 to promote mixing and combustion. In addition, the temperature of the inner and outer flame cylinders 17 and 18 rises quickly to increase the amount of air in the lower part of the combustion chamber 19 and quickly form a flame in the air hole 20, resulting in insufficient mixing and cooling of the flame. The odor (corresponding to the peak of the curve A) generated can also be significantly reduced. Further, since the suction capacity is reduced at the place corresponding to the peak, the exhaust holes 15 of the odor reduction means 10 caused by excessive suction are reduced.
The generation of white smoke from the air and the deterioration of the odor due to the insufficient rise of the flame in the combustion chamber 19 are prevented.

FIG. 6 is a schematic diagram of a control circuit of the odor reducing means 10 of this embodiment. When the lead 5 is raised by operating the lead raising / lowering mechanism 8, the switch 22 linked with the lead raising / lowering mechanism 8 starts the ignition voltage switching timer 23 and the ignition timer 24. When both the ignition voltage switching timer 23 and the ignition timer 24 are on, a current flows to R1 (low resistance) by the voltage switching means 25, and the voltage applied to the motor 13 becomes a high voltage (V1). Next, when the ignition voltage switching timer 23 is turned off and only the ignition timer 24 is turned on, the voltage switching means is turned on.
Due to 25, a current flows to R2 (high resistance), and the voltage applied to the motor 13 becomes low voltage (V2).

When the ignition timer 24 turns off after a certain period of time, the drive permission signal from the ignition timer 24 turns off and the motor 13
Stops.

In the above description, the case where the odor reducing means 10 is operated only at the time of ignition has been described. However, in FIG. 6, the odor reducing means 10 is operated at the time of fire extinguishing similarly to the time of ignition.
That is, when the core 5 is moved down by operating the core lifting mechanism 8, the switch 22 interlocked with the core lifting mechanism 8 is switched to activate the fire-extinguishing voltage switching timer 26 and the fire-extinguishing timer 27. After that, the motor 13 of the odor reducing means 10 is operated in the same manner as in the ignition, to reduce the odor in extinguishing the fire. As described above, the use of the same odor reducing means 10 as in ignition at the time of fire extinguishing can reduce the odor at the time of ignition and fire extinguishing effectively and inexpensively.

In the above embodiment, the fire extinguishing operation is performed in the same manner as the ignition operation.
Although the example in which the odor reduction means 10 is operated in the pattern shown in the figure is shown, it is not necessary to operate in the same pattern when extinguishing the fire, and the fire extinguishing voltage switching timer 26, the fire extinguishing timer 27 and the voltage switching are performed as necessary. By changing the means 25, it is possible to operate at a constant voltage as in the conventional example, or to change the operation pattern of the odor reduction means 10 between the time of extinguishing and the time of ignition.

However, when the fire is extinguished, the fuel vaporization from the tip of the wick 5 is in a direction of sharp decrease, and it is not necessary to operate the fuel tank with high capacity for a long time. Instead, the fuel vapor in the oil tank 1 is discharged into the room through the exhaust hole 15. It seems that the pattern shown in FIG. 5 is also effective for suppressing this. Further, by adopting such a pattern, it is possible to suppress waste of a dry battery as a power source and noise when the motor 13 operates. Further, it can also be used as a notifying means for notifying that the odor reducing means 10 is operating by using a short time immediately after ignition having a strong suction ability.

Further, in this embodiment, the case of switching in two stages as shown in FIG. 5 has been described. However, if the configurations of the ignition voltage switching timer 23, the ignition timer 24 and the voltage switching means 25 are changed, the number of voltage switching stages can be reduced. It is also possible to control the odor reducing means 10 more finely.

Effect of the Invention As described above, according to the combustion apparatus of the present invention, at the time of ignition and fire extinguishing, the fuel gas is sucked and exhausted from the upper part of the lamp core through the oil tank, and the subsequent suction capacity is obtained from the suction capacity immediately after ignition. Since it has an odor reduction means that stops suction after the flame is stabilized, it suppresses a sudden increase in gas concentration in the combustion chamber immediately after ignition, and introduces air into the combustion chamber to reduce fuel and air. By promoting the mixing and combustion, the odor at the time of ignition can be greatly reduced. Further, since the voltage applied to the odor reducing means is reduced in a stepwise manner, generation of white smoke due to excessive suction and deterioration of the odor due to insufficient rising of the flame are prevented. According to the above effects, the comfort of the up-down type combustion device can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a combustion device according to an embodiment of the present invention,
FIG. 2 is a characteristic diagram showing an odor generation state of the combustion device, and FIG.
FIG. 4 is a sectional view of a main part of a combustion device according to an embodiment of the present invention. FIG. 4 is a characteristic diagram showing the capability of the odor reduction device of the device. FIG. 5 shows the voltage applied to the odor reduction device of the device. Characteristic diagram, 6th
FIG. 7 is a circuit diagram of the odor reducing means of the apparatus, FIG. 7 is a sectional view of a conventional combustion apparatus, and FIG. 8 is a circuit diagram of suction means of the conventional combustion apparatus. 1 ... oil tank, 2 ... core guide cylinder, 3 ... core outer cylinder, 4 ...
... core gap, 5 ... core, 8 ... core vertical mechanism, 9 ... combustion cylinder, 10 ... odor reduction means.

Claims (3)

(57) [Claims] An oil tank having a core gap formed by a core guide cylinder and a core outer cylinder; a core disposed vertically movable in the core gap of the oil tank; A combustion cylinder mounted above the cylinder, and a core vertical mechanism for vertically moving the core,
Installed in a part of the oil tank, at the time of ignition, the fuel gas is sucked and exhausted from the upper part of the core against the heat draft force through the oil tank, and the suction capacity after that is made smaller than the suction capacity immediately after ignition. A combustion device having an odor reducing means for stopping suction after flame stabilization. 2. An oil tank having a core gap formed by a core guide cylinder and a core outer cylinder, a core disposed vertically movable within the core gap of the oil tank, A combustion cylinder installed above the cylinder, a core vertical movement mechanism for moving the core up and down, and a thermal draft force installed in a part of the oil tank through the oil tank during ignition and fire extinguishing; In addition to sucking and exhausting fuel gas from the upper part of the core, the suction capacity after the ignition is made smaller than the suction capacity immediately after ignition, and after flame stabilization,
A combustion device having an odor reducing means for stopping suction. 3. The method according to claim 1, wherein the applied voltage of the odor reducing means at the time of ignition is increased immediately after the ignition, and thereafter, the applied voltage is reduced stepwise, and the suction is stopped after the flame is stabilized. Combustion equipment.