JPH03267607A - Combustion device - Google Patents

Abstract

PURPOSE:To greatly reduce smell at ignition and extinguishing of fire by providing a smell reducing means such that fuel gas is sucked and discharged from the upper location of a wick via the interior of an oil tank and the suction ability is made large enough to cause a flame to encircle the total periphery of the end of the end of the wick at least at ignition and thereafter made smaller. CONSTITUTION:A smell reducing means 27, which sucks and discharges gases in an oil tank 18 from a suction port 28, comprises a turbofan 29 for sucking gases in the tank 18, a motor 30 for driving the fan, and a valve 31 which is opened by the air flow when the turbofan 29 is rotated to suck gases in the tank 18. When a wick lifting mechanism 25 is operated to suitably expose a wick 22 above an inner fire case 23 and outer fire case 24 to ignite the wick, combustion is effected in a combustion cylinder 26 to provide heating. At the ignition, the means 27 is actuated and immediately thereafter, strong irritating smell is effectively reduced and, in addition, abrupt increase in concentration of fuel gas in the combustion chamber is restrained, while air is introduced thereinto and hence mixing and combustion of the air and fuel is promoted, so that smell at the ignition can be greatly reduced. Further, the means 27 is also actuated at extinguishing fire in a similar manner.

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 In general, upper-and-lower wick type combustion devices have a problem in 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. 7 shows a combustion device having such a suction means, where 1 is an oil tank, 2 is a core guide cylinder installed upright in the oil tank L, 3 is a core outer cylinder fixed on the oil tank 1, and 4 is a core guide. A core gap 5 formed by the tube 2 and the core outer tube 3 is a core that moves up and down within this core gap 4.

6 is a core up and down mechanism that moves the core 5 up and down and moves the core guide tube 2.
And outside the core? The tip of the wick 5 is exposed at the lower end of the combustion cylinder 7 placed on the J3, and combustion is performed.

Reference numeral 8 denotes a suction means that operates when igniting and extinguishing a fire, and is configured to rotate a fan 10 by a motor 9 and suck and exhaust the inside of the oil tank 1 through a suction port 11 of the oil tank 1. 12
is a cartridge tank.

In the above configuration, when the wick up-and-down mechanism 6 is operated to expose the wick 5 to an appropriate extent into the combustion w7 and ignite it, the wick 5 burns in the combustion tube 7 and it becomes possible to collect heat. Then, by operating the wick up and down mechanism 6 in the opposite direction, the wick 5 sinks into the wick gap 4 to a predetermined position and extinguishes the fire. When igniting or extinguishing the ignition, a switch (not shown) that is turned on and off by the wick up/down mechanism 6 is turned on, and the suction means 8 is operated for a certain period of time, causing the fuel to flow out through the combustion cylinder 7 due to the draft. Transfer unburned components to oil tank 1
A control device for such a suction means, which reduces odor by sucking it into the interior and releasing it to the outside from the exhaust port 13 without being thermally decomposed, was constructed as shown in FIG. When the wick up/down mechanism 6 is operated to raise the wick 5, the ignition timer 15 is activated through the contacts of the switch 14 interlocked with the wick up/down mechanism 6, a drive permission signal is output to the motor drive circuit 16, and the motor 9 is activated. When the motor 9 rotates and performs an odor absorbing operation, and a certain period of time has elapsed, the ignition timer 15 is turned off and the motor 9 is stopped.

Next, when the wick 5 is lowered by operating the wick up/down mechanism 6 and the wick 5 is extinguished, the extinguishing timer 17 is passed through the contact point of the switch 14.
is started, a drive permission signal is output to the motor drive circuit 16, and the motor 9 rotates to perform the odor absorption operation. When a certain period of time has elapsed, the extinguishing timer 17 is turned off and the motor 9 is stopped.

Problems to be Solved by the Invention However, in the conventional device described above, when the suction means 8 is simply activated in the same way as when extinguishing a fire, the battery voltage is directly applied to the suction means 8, so the ability of the suction means 8 is controlled. Because of this, it was difficult to obtain an appropriate air volume for the odor absorption operation during ignition, which caused the following problems. That is, when igniting, the amount of fuel vaporized from the tip of wick 5 is larger than when extinguishing, so if the capacity of suction means 8 is too large, the vaporized gas sucked into oil tank 1 will be discharged from exhaust port 13, producing white smoke. There was a case. Furthermore, since the amount of fuel vaporized is suppressed by the suction, the startup of combustion is delayed, and combustion failure occurs due to cooling of the flame, etc., which may even generate odor. On the contrary, if the capacity of the suction means 8 was small, there was a problem that the odor was not sufficiently reduced.

The present invention was made in view of such conventional problems, and the first object is to obtain a combustion device that significantly reduces the odor at the time of ignition.
This is the purpose of

The second objective is to obtain a combustion device having an effective odor reduction means that matches the odor generation situation at the time of ignition.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention sucks and exhausts fuel gas from the upper part of the wick through the inside of the oil tank at the time of ignition. It is equipped with an odor reduction means that increases the suction capacity until the flame turns and reduces the suction capacity after that.

In addition, in order to achieve the second objective, the voltage applied to the odor reduction means is increased at least until the flame rotates all around the tip of the wick,
The applied voltage is then lowered in stages.

The combustion device of the present invention has the above-mentioned configuration, which not only effectively reduces the strong irritating odor immediately after ignition, but also suppresses the subsequent rapid increase in fuel gas concentration within the combustion chamber, and introduces air into the combustion chamber. It promotes the mixing and combustion of fuel and air, and can significantly reduce the odor at the time of ignition.

In addition, the voltage applied to the odor reduction means is increased at least until the flame spreads around the entire circumference of the tip of the wick, and then the applied voltage is gradually lowered to reduce odor caused by the generation of white smoke due to excessive suction or insufficient rise of the flame. deterioration can be prevented.

Example An example of this will be described below with reference to FIGS. 1 to 6.

18 is an oil tank, 19 is a core guide tube erected on the oil tank 18, 20 is a core outer tube fixed on the oil tank 18, and 21 is a core gap formed by the core guide tube 19 and the core outer tube 20. ,2
2 is a core that moves up and down within this core gap 21. An inner fire pan 23 is disposed above the core guide cylinder 19, and an outer fire pan 24 is disposed above the core outer cylinder 20. 25 is a core up/down mechanism, and the core 22
It is configured such that the upper end of the wick 22 is exposed above the inner fire pan 23 and the outer fire pan 20 to an appropriate extent. 26
is a combustion cylinder, which is placed on an inner fire pan 23 and an outer fire pan 24, and is configured so that combustion is carried out inside thereof. 27
is an odor reducing means that sucks and exhausts the oil tank from the suction port 28 of the oil tank 18 within one day. This odor reduction means 27 is a turbo fan 2 for sucking the inside of the oil tank 18.
9, a motor 30 for rotating the turbo fan 29, and a valve 31 that is opened by the wind force when the turbo fan 29 rotates and sucks and exhausts the inside of the oil tank 18.
is an exhaust port, and 33 is a cartridge tank.

In the above configuration, when the wick up-and-down mechanism 25 is operated to expose the wick 22 to an appropriate amount on the inner fire pan 23 and the outer fire pan 24 and ignite it, combustion occurs in the combustion tube 26 and heating becomes possible. The odor reduction means 27 is activated at this time of ignition, and its effect will be explained.

FIG. 2 shows how odor is generated during ignition.

The vertical axis shows the hydrocarbon (HC) concentration as an odor index, and the horizontal axis shows the elapsed time after ignition. When the odor reduction means 27 is not operated at 0 ignition, 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. One is a sharp peak (■) that occurs immediately after ignition, and the other is a relatively gentle scrap-like peak (■) that occurs afterwards. Peak ■ is a strong irritating odor, but it decays in a short time, whereas peak ■ has a lower HC level than peak ■, but it lasts for a longer time, so the odor is felt to be stronger. The state of occurrence of such an odor is closely related to the state of the flame after ignition, and the peak ■ occurs after ignition until the flame has spread around the entire periphery of the tip of the wick 22, and the peak ■
It was found that this occurs during the stage when combustion is starting up.

Let me explain this situation in a little more detail. In Figure 3, 3
4.35 are the inner and outer flame tubes of the combustion tube 26, which are placed on the inner and outer flame trays 23 and 24, respectively. 36 is inner flame tube 3
4. In the combustion chamber formed between the outer flame cylinders 35, the tip of the wick 22 is exposed to an appropriate amount in this combustion chamber 36, and combustion continues. 37
Numerous air holes are provided in the inner and outer flame tubes 34 and 35, and combustion air is supplied into the combustion chamber 36 from the air holes 37. When the wick 22 is raised by the wick up/down mechanism 25 and the ignition heater 38 is brought close to the wick 22 and ignited, combustion begins.Normally, in a wick up/down type combustion device, the wick 22 has a cylindrical shape, and after ignition it has a circumferential shape. The flame rotates and the fire rotation is completed. In the middle stage of this flame rotation, fuel is always vaporized from the tip of the wick 22 in front of the flame, and the vaporized gas from the front of the flame passes through the combustion chamber 36 without being combusted and is released into the atmosphere. ■A strong pungent odor. After the combustion is completed, the amount of fuel vaporization increases and the flame rises, gradually leading to stable combustion.
While the fuel gas increases rapidly inside the combustion chamber, the rise of the draft force is insufficient, resulting in insufficient air supply from the inner and outer flame tubes 34 and 35, resulting in insufficient mixing.
The flame comes into contact with the walls of the inner and outer flame tubes 34 and 35 and is cooled, so that combustion does not proceed efficiently, which causes odor.

This odor continues until the flame starts and the combustion tube reaches a high temperature. This appears as the odor at peak ■.

Therefore, in order to suppress the odor at the time of ignition, it is necessary to effectively reduce both the above-mentioned peaks (■) and (2).An example of this method is to use the suction means 8 during ignition as well as when extinguishing. There is. However, when igniting, unlike when extinguishing, combustion begins and the amount of vaporized fuel increases dramatically.
It is difficult to obtain a sufficient effect even if 0 is activated. For example, in order to suppress the strong irritating odor at peak ■, odor reduction means 2 is used.
7 must have a high capacity, but if the high capacity is operated at a constant voltage, the same problems as in the conventional example will occur. In addition, if the capacity is too low, a sufficient odor reduction effect cannot be obtained.However, as a result of a detailed study on this point, as shown in Figure 4, the suction capacity after that is smaller than the suction capacity immediately after the ignition operation. It became clear that the pattern did not have the above-mentioned defects and had a large odor reduction effect.

In order to realize such a suction pattern, as shown in FIG.
) has been found to be effective. It was also found that the holding time tl at Vl should be set at least until the flame circulates around the entire circumference of the tip of the wick 22, and then the voltage should be lowered stepwise to V2.

In other words, the strong pungent odor corresponding to beak ■ in Figure 2 is core 2.
This occurs until the flame spreads around the entire circumference of the tip. By suctioning this part with high capacity and then gradually decreasing the suction capacity when the fan-shaped beak appears, it is possible to prevent the generation of white charcoal due to excessive suction. It eliminates odor deterioration due to insufficient flame startup and maximizes the odor reduction effect. With this odor reducing means 27, the odor (HC) at the time of ignition can be significantly reduced as shown by curve B in FIG.

The mechanism of ignition odor reduction when the odor reduction means 27 is activated will be explained. When the ignition flame goes around zero, fuel is always vaporized from the flame tip as described above, but when the odor reduction means 27 is activated, the oil tank 18 Since the pressure inside is reduced, the fuel gas vaporized from the tip of the wick 22 in front of the flame is sucked into the oil tank 18 through the gaps between the wick 22, the wick guide tube 19, and the wick outer tube 20. Therefore, if the odor reduction means 27 is operated at high voltage 1 for at least one hour until the flame spreads around the entire circumference of the tip of the wick 22, the vaporized gas (curve A) will be released directly into the atmosphere without being combusted. (corresponds to beak)
is significantly reduced. On the other hand, if the 11 hours are too short and the suction capacity of the odor reduction means 27 is reduced before the flame has spread around the entire periphery of the tip of the wick 22, the strong pungent odor (beak ■) cannot be effectively reduced. In addition, when the flame starts up, the odor reduction means 27 is activated to suppress a sudden increase in fuel concentration within the combustion chamber 36, and to supply air from the inner and outer flame tubes 34 and 35 for mixing. Promote combustion. In addition, in order to increase the amount of air in the lower part of the combustion chamber 36 and quickly form a flame in the air hole 37, the inner and outer flame tubes are
Since the temperature of 4.35% rises quickly, the odor caused by insufficient mixing and flame cooling (corresponding to peak ■ in curve A) can also be significantly reduced. Furthermore, in the area corresponding to the beak ■, the suction capacity is gradually reduced, so that the exhaust hole 2 of the odor reduction means 27 that occurs due to excessive suction
The generation of white smoke from the combustion chamber 36 and the deterioration of odor due to insufficient rise of flame within the combustion chamber 36 are prevented.

FIG. 6 is a schematic diagram of the control circuit of the odor reduction means 27 of this embodiment. When the wick up/down mechanism 25 is operated to raise the wick 22, a switch 39 interlocked with the wick up/down mechanism 25 starts the ignition voltage switching timer 40 and the ignition timer 41. When both are on, the voltage switching means 42
1 (low resistance), and the voltage applied to the motor 30 becomes high voltage (Vl).

The ignition voltage switching timer 40 is set to at least the time t1 required for the flame to travel around the entire circumference of the tip of the wick 22, and when the ignition voltage switching timer 40 is turned off and only the ignition timer 41 is turned on, the voltage is switched. Means 4
2 causes current to flow to R2 (high resistance), and the voltage applied to the motor 13 becomes a low voltage (v2).

When the ignition timer 41 is turned off after a certain period of time has elapsed, the drive permission signal from the ignition timer 41 is turned off and the motor 30 is stopped.

In the above explanation, a case has been described in which the odor reducing means 27 is activated only when igniting the fire, but in FIG. 6, the odor reducing means 27 is activated when extinguishing the fire in the same way as when igniting. That is, when the wick up/down mechanism 25 is operated to lower the wick 22 to extinguish the fire, the switch 39 interlocked with the wick up/down mechanism 25 is switched to start the extinguishing voltage switching timer 43 and the extinguishing timer 44.

The rest is the same as when igniting the motor 3 of the odor reduction means 27.
By using the same odor reduction means 27 during extinguishing as in ignition as in 0 or above, the odor during ignition and extinguishing can be reduced inexpensively and effectively. can.

Furthermore, in the above embodiments, the odor reduction means 27 is operated in the same pattern as shown in FIG. It is not necessary to specify tl), and the extinguishing voltage switching timer 43 and extinguishing timer 44 are set as necessary.
By changing the voltage switching means 42, it is possible to operate the odor reduction means 27 at a constant voltage as in the conventional example, or to change the operation pattern of the odor reduction means 27 between extinguishing and igniting.

However, when extinguishing a fire, the vaporization of fuel from the tip of the wick 22 tends to decrease rapidly, so there is no need to operate the odor reduction means 27 at high capacity for a long time. The pattern shown in FIG. 5 is also considered to be effective in suppressing the discharge. Furthermore, by adopting such a pattern, it is possible to suppress the waste of dry cell batteries as a power source and the noise generated when the motor 30 is operated. It can also be used as a notification means to notify that the odor reduction means 27 is operating by utilizing the short period immediately after ignition when the suction ability is strong.

Furthermore, in this embodiment, a case has been described in which switching is performed in two stages as shown in FIG. It is also possible to increase the number of odor reduction means 27 and control the odor reduction means 27 more finely.

Effects of the Invention As described above, according to the combustion device of the present invention, fuel gas is sucked and exhausted from the upper part of the wick through the oil tank during ignition and extinguishing, and at the same time, a small amount of flame is generated at the time of ignition (both flames are generated around the entire periphery of the wick tip). Since it has an odor reduction means that increases the suction capacity until it turns and reduces the suction capacity after that, it effectively reduces the strong irritating odor that occurs before the flame turns around the entire periphery of the tip of the wick, and In addition to suppressing the rapid increase in gas concentration within the combustion chamber immediately after ignition, air is introduced into the combustion chamber to promote mixing and combustion of fuel and air, thereby significantly reducing odor during ignition. In addition, since the voltage applied to the odor reduction means is gradually lowered, the wick type combustion device has an effect of more than 0, which prevents the generation of white smoke due to excessive suction and the deterioration of odor due to insufficient flame rise. can significantly improve comfort.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a combustion device in an embodiment of the present invention;
FIG. 2 is a characteristic diagram showing the odor generation situation, FIG. 3 is a cross-sectional view of the main part of a combustion device according to an embodiment of the present invention, FIG. 4 is a characteristic diagram showing the ability of the odor reduction means of the same device, and FIG. Fig. 5 is a characteristic diagram showing the voltage applied to the odor reduction means of the same device, Fig. 6 is a circuit diagram of the odor reduction means of the same device, Fig. 7 is a sectional view of the conventional combustion device, and Fig. 8 is the conventional combustion device. FIG. 3 is a circuit diagram of the suction means of the combustion device. 17-... Odor reduction means, 18... Oil tank, 19... Core guide cylinder, 20... Core outer cylinder, 21... Core gap, 22...core,
25... Core up and down mechanism, 26... Combustion tube. lθ 9- π 1 2- 5 A - Pickled tank core guide cylinder; also outer cylinder core Seki City 71! -1 lower engine roof edge, y front cylinder 2nd figure, taten moat discharge 8 ginma diagram fig. # 4 fig.

Claims (2)

[Claims] (1) An oil tank having a core gap formed by a core guide tube and a core outer tube, a core disposed vertically movably within the core gap of the oil tank, and the core guide tube and the core outer tube. A combustion cylinder placed above, a wick up and down mechanism that moves the wick up and down, and a wick up and down mechanism installed in a part of the oil tank, which supplies fuel gas from the top of the wick through the oil tank during ignition and extinguishing. A combustion device having an odor reducing means that sucks and exhausts the air, increases the suction ability at least until the flame circulates around the tip of the wick at the time of ignition, and reduces the suction ability thereafter. (2) The combustion device according to claim 1, wherein the voltage applied to the odor reducing means at the time of ignition is increased at least until the flame rotates around the entire periphery of the tip of the wick, and thereafter the applied voltage is reduced in stages.