JPH10196943A - Liquid fuel combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress tar adhered to a vaporizer in a liquid fuel combustion equipment. SOLUTION: In the case of heating a vaporizer 6 by a heater 10 from start of operating, first heater OFF temperature is raised between a normal temperature level and an abnormal temperature level. Thus, even if a cleaning means is not operated, adherence of tar to a vaporizing element 8, a nozzle hole 13A, a needle valve 16 can be suppressed, and satisfactory combustion can be continued for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus for vaporizing liquid fuel and ejecting the vaporized gas from a nozzle for combustion.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus is shown in FIGS.
As shown in FIG.
The fuel in the tank 31 is supplied by the pump 60 to the vaporizing section 33 which is kept at a predetermined temperature or higher during combustion. Then, the supplied fuel is vaporized by a vaporizing element 35 provided in a vaporizing chamber 34 in a vaporizing section 33 and becomes a vaporized gas, and has a high pressure in the vaporizing chamber 34. And nozzle part hole 3
The gas is ejected from 6A and supplied to the burner 37, where it is burned. In addition, a flame rod type combustion sensor 63 that detects a combustion state from the amount of current flowing by applying a voltage to the burner portion 37 and a flame electrode 38 placed in the combustion flame is disposed near the burner portion 37. . The generated combustion exhaust gas is guided upward by a combustion tube 39 disposed so as to cover the periphery of the burner section 37, mixed with a room air flow from a blower 41 by a duct 40 covering the combustion tube 39, and It is discharged as and used for heating.

A nozzle hole 36A for ejecting fuel vaporized gas in the vaporizing chamber 34 is opened and closed by a needle valve 44 provided in a movable portion of the electromagnetic valve 43. When the combustion is stopped, the electromagnetic valve 43A is closed.
Is energized for a predetermined time to stop the combustion without ejecting the vaporized gas from the nozzle hole 36A.

Further, the control section 50 applies a voltage corresponding to the combustion state to the frame electrode 38 and the burner section 37, and controls the combustion from the output of the combustion sensor 63 obtained from the amount of current flowing. ing. When the combustion of the burner unit 37 causes an abnormality for some reason, for example, when the combustion air becomes extremely small, the current value decreases and the control unit 5
In order to prevent premature disconnection in a normal state, if the current value is lower than a predetermined value and held for a predetermined time, it is determined that there is an abnormality, and the control unit 50 sets the pump 60 and the blower 41 to a predetermined sequence. To stop the combustion.

[0005] A flow chart from the start of operation to the stable combustion is shown in FIG.
In the case of 0, when the operation start signal is output, the heater 61 is energized, and then the solenoid valve 43 is operated to close the nozzle hole 36A of the nozzle 36 with the needle valve 44. Next, the vaporization unit 33
When the temperature exceeds a predetermined temperature, the pump 60 is activated to start the blower 41, and when the vaporization section 33 reaches a predetermined combustible temperature range, the energization of the heater 61 is stopped and the normal O
In the N / OFF control, the ignition means is provided, the energization of the solenoid valve 43 is stopped, the needle valve 44 is opened, and the nozzle hole 36A is opened.
More vaporized gas injection combustion is started.

[0006]

However, such a conventional liquid fuel combustion apparatus is particularly higher than kerosene when a fuel mixed with a different component such as a modified oil or a different oil which has been stored and oxidized for a long time is used. When the fuel containing a large amount of the boiling point is vaporized, the fuel that is not vaporized by the vaporizing element 35 has a problem that tar is generated and poor vaporization or clogging of the vaporizing element 35 occurs.

Further, when the fuel sent from the pump 60 at the time of ignition enters the vaporizing section 33, the capability of the vaporizing element 35 is rapidly reduced, which causes tar generation.

Further, when the vaporizing section 33 is stable at a constant temperature, vaporization is performed only at a specific position, and the positions where tarification and clogging are concentrated are concentrated, and the effective volume of the vaporizing element 35 is fully utilized. However, there is a problem that the service life is deteriorated due to tar generation.

[0009] When the poor vaporization due to the formation of tar proceeds, the vaporization amount decreases and the vaporization jet pressure does not increase so much, the jet of the vaporized gas from the nozzle hole 36A becomes weak, and the ejector effect due to the jet is weakened, so that the primary air is discharged. Is reduced, and the combustion state of the burner 37 is deteriorated. As a result, pulse combustion, odor, soot, carbon monoxide is generated, and finally, a fire is caused.

The clogging of the vaporizing element 35 prevents fuel from entering the vaporizing chamber 34, especially near the fuel inlet of the vaporizing chamber 34, and causes the vaporizing chamber 34 to supply the fuel from the pump 60. Incoming fuel decreases, the amount of vaporization decreases, and the amount of combustion decreases. Eventually, the fuel becomes weakly burned, exceeding the limit of good combustion, generating odor or misfiring.

In the liquid fuel combustion apparatus, before the odor or misfiring, an abnormality is detected by the combustion sensor 63 or the like, and the operation of the apparatus is stopped. There is a problem that clogging affects the life of the device.

Therefore, in order to solve such a problem, the heater 61 is energized for a predetermined period of time during non-combustion so as to solve the problem.
Keep the temperature of 3 above the normal temperature level and pump 6
Further, the cleaning means for removing the tar content accumulated in the vaporizing element 35 by driving the vaporizing element 35 is operated, and the tar in the vaporizing element 35 having a high boiling point, which is not normally vaporized, is discharged from the vaporizing section 33 so as to be improved. .

However, when the tar in the vaporizing element 35 having a high boiling point, which is not usually vaporized, is discharged toward the nozzle hole 36A, the tar is discharged.
There is also a problem that it adheres to the needle valve 44 that opens and closes A.

When the tar adheres, the nozzle hole 3
Since the 6A and the needle valve 44 are separated from the vaporizing section 33, they cannot be easily removed. In particular, the tar is soft at the time of the high temperature immediately after the deposition, but the tar is softened when the cleaning means is finished and the cooling is completed. The tar deposited on the nozzle portion hole 36A cannot be removed by the needle valve 44 and the amount of combustion fluctuates. In some cases, the removed tar adheres to the outer periphery of the nozzle hole 36 and disturbs the flow of the vaporized gas ejected from the nozzle hole 36A.

As another problem, tar adhering to the needle valve 44 flows downward due to its gravity, and the adhering portion concentrates on a lower sliding portion (not shown) having a low temperature, so that the needle valve 44 sticks. And get stuck. For example, the nozzle hole 3
If 6A is left open, the combustion after the end of the cleaning operation, even if ignited, at the time of fire extinguishing, the fuel accumulated in the vaporizing element 35 and the vaporizing chamber 34 is discharged from the nozzle hole 36A, and a large amount of white smoke and There were problems such as generation of strong odor. If the nozzle hole 36A is kept closed, the combustion sensor 63 is activated without starting combustion, and the safety device is activated to stop. Also, if the fuel gas is stopped in the middle of the nozzle hole 36A, the flow of the vaporized gas ejected from the nozzle hole 36A is disturbed or obstructed, the amount of the vaporized gas is reduced, and the combustion sensor 63 detects an abnormality and quickly detects the abnormality. In addition to the burnout, there were problems such as the generation of a large amount of white smoke and a strong odor at the time of fire extinguishing, and the fact that the fire did not disappear.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to enable safe and good combustion for a long period of time without the operation of a cleaning means in removing tar of a vaporizing element.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a tank for storing liquid fuel, a pump for sucking and discharging fuel from the fuel tank, and a pump for supplying fuel supplied by the pump. A vaporizing section to be vaporized, a heater for heating the vaporizing section, temperature detecting means for detecting a temperature of the vaporizing section, a nozzle for ejecting the fuel vaporized in the vaporizing section, and a nozzle for opening and closing the nozzle. A solenoid valve,
A burner section for burning the vaporized gas that has been jetted, and energization of the heater turned on by a signal from a temperature detecting means of the vaporization section to maintain the temperature of the vaporization section within a predetermined temperature range.
A normal temperature level for OFF control, and a temperature control section for stopping combustion when the temperature of the vaporizing section exceeds the normal temperature level and reaches a predetermined abnormal temperature level, and the temperature control section is firstly operated after the start of operation. Turn off heater power
The temperature level to be set was set between the normal temperature level and the abnormal temperature level.

According to the above invention, a fuel containing a higher boiling point than a kerosene mixed with a different component such as a modified oil or a different oil which has been stored and oxidized for a long time, the fuel which is not vaporized by the vaporization element is tar-produced. Insufficient vaporization and clogging of the vaporizing element may occur.However, during the initial stage of combustion, components with a high boiling point in the fuel are discharged from the nozzle before tarification, preventing clogging in the vaporizing element and specially. It is possible to remove tar without performing a cleaning operation.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a tank for storing liquid fuel, a pump for sucking and discharging fuel from the fuel tank, a vaporizing section for vaporizing the fuel supplied by the pump, and heating the vaporizing section. A temperature detecting means for detecting the temperature of the vaporizing section, a nozzle for ejecting fuel vaporized in the vaporizing section, an electromagnetic valve for opening and closing the nozzle, and an ejected vaporized gas. A burner section to be burned, a normal temperature level for controlling ON / OFF of a heater by a signal from a temperature detecting means of the vaporizing section to maintain the temperature of the vaporizing section within a predetermined temperature range, and a temperature of the vaporizing section. Has a temperature control unit that stops combustion when the temperature exceeds the normal temperature level and reaches a predetermined abnormal temperature level, and the temperature control unit turns off the first heater after the start of operation. The that temperature levels set during normal temperature levels and abnormal temperature level.

Further, the temperature control unit is provided with a timer which is started at the same time as the start of operation, and the timer is set while the vaporization unit reaches an abnormal level of the vaporization unit at a temperature higher than a temperature level at which normal heater energization is turned off. .

[0021] Then, it is possible to suppress a decrease in the temperature of the vaporization section due to the liquid fuel sent from the pump at the time of ignition, and there is an effect of suppressing the generation of tar due to the temperature decrease.

When heating the vaporizing section with the heater from the start of the operation, the temperature control section sets the temperature level at which the power supply to the first heater is turned off after the start of the operation between the normal temperature level and the abnormal temperature level for a predetermined time. Temperature levels were maintained between normal and abnormal temperature levels.

In addition to suppressing the temperature fluctuation of the vaporizing portion when the heater is turned off, the vaporizing point can be moved by changing the temperature of the vaporizing element, so that the entire vaporizing element can be effectively used. It has the effect of extending the time of clogging.

The temperature level at which the power supply to the first heater is turned off when the operation switch is turned on is set to be equal to or higher than the abnormal temperature level of the vaporizing section. Increase the abnormality detection level while exceeding the normal abnormal temperature level,
Or, it was undetectable.

The temperature at which the vaporization section reaches an abnormal temperature level and stops the combustion is defined as an abnormal temperature level A at which the combustion must be stopped when the temperature reaches even an instantaneous level, and the combustion is performed when the temperature is maintained for a predetermined time. Two abnormal temperature levels of abnormal temperature level B that must be stopped are provided, and when heating the vaporization section with a heater from the start of operation, the temperature at which the first heater is de-energized when the operation switch is pressed, The temperature was set to be between the abnormal temperature level A where the combustion must be stopped when the normal temperature level of the vaporizing section is reached even momentarily.

Then, there is an action of removing components having a high boiling point which could not be removed below the abnormal temperature level.

Further, a control unit capable of storing the combustion time of the liquid combustion apparatus is provided, and the vaporizing unit is forcibly heated by the heater at predetermined time intervals, and the temperature of the vaporizing unit is set between the normal temperature level and the abnormal temperature level. Was maintained.

Further, even during continuous combustion, there is an action to periodically remove components having a high boiling point.

According to any of the above inventions, when a fuel mixed with a different component such as an altered oil or a different oil which has been stored and oxidized for a long period of time is used, the fuel containing a higher boiling point than kerosene, in particular, is supplied to the vaporizing element. Unevaporated fuel produces tar,
In order to prevent problems such as poor vaporization and clogging of the vaporizing element, components in the high-boiling point in the fuel are discharged from the nozzle before tarification at the initial stage of combustion to prevent clogging in the vaporizing element. It is possible to remove tar without performing cleaning means.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) First, the configuration of the liquid fuel combustion apparatus of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a main body case, which is provided with a tank 2 for holding liquid fuel on a lower side thereof and a detachable cartridge tank 3 above the tank 2. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, which supplies fuel to the vaporizing section 6 from the upper end thereof via an oil feed pipe 5.

The vaporizing section 6 is provided with a vaporizing element 8 for promoting the vaporization of the fuel in a vaporizing chamber 7 for vaporizing the supplied fuel, and a mixing pipe 9 projects from the center of the vaporizing section 6 to form a mixing pipe. The heater 10 and the evaporator temperature detecting means 11 are provided on the peripheral wall of the annular member. Reference numeral 12 denotes a communication passage provided to the nozzle unit 13 on the side opposite to the mixing pipe 9 with respect to the inlet of the oil feed pipe 5 of the vaporization unit 6.

A return pipe 14 connected to the tank 2 and a solenoid valve 15 are connected to the nozzle 13, and the solenoid valve 15 has a needle valve 16 for opening and closing a nozzle hole 13 A of the nozzle 13. Is provided.

Reference numeral 17 denotes a burner mounted on the upper portion of the vaporizer 6 so as to cover the outlet of the mixing pipe 9. The burner 17 burns the vaporized gas ejected from a flame hole 18 formed in the peripheral wall of the burner 17 in the vicinity. An ignition means 19 for starting high pressure discharge or the like is provided. Reference numeral 20 denotes a combustion tube for guiding the combustion exhaust gas from the burner section 17 upward, and a blower 21 for taking in and sending out the indoor air flow is disposed at the back of the combustion tube. Reference numeral 24 denotes a duct for mixing the high-temperature combustion exhaust gas from the combustion tube 20 and the indoor air flow to guide hot air.

Further, as shown in FIG.
The pump 4, the heater 10, the blower 21, and the like are determined in advance on the basis of a signal of an operating condition such as a control temperature input from the apparatus 4 or a signal from a sensor such as a vaporizing section temperature detecting means 11 provided in the apparatus. It is a control unit that controls the operation of devices that start and stop combustion by controlling in a sequence.

From the start of operation until the combustion is stabilized, as shown in the flowchart of FIG. 4, when the operation start signal is output, the control unit 25 energizes the heater 10, activates the solenoid valve 15 and activates the needle valve 16 Closes the nozzle hole 13A of the nozzle 13. Next, when the temperature of the vaporizing section 6 passes the predetermined temperature, the pump 4 is operated to start the blower 21, and when the vaporizing section 6 reaches the conventional combustible normal temperature level 94 as shown in FIG. Turn off power
However, in this embodiment, the ignition means 19 is provided without stopping the energization of the heater 10, the energization of the solenoid valve 15 is stopped, the needle valve 16 is opened, and the vaporization gas is ejected from the nozzle portion 13 to start combustion. Let it. After that, before the temperature of the vaporizing section 6 reaches the abnormal temperature level 95, the energization of the heater 10 is stopped, and the temperature of the vaporizing section 6 is raised as high as possible.

As shown in the flow chart of FIG. 5, even when the temperature reaches the normal temperature level 94 at which normal combustion is possible, a timer for a predetermined time is provided only at the beginning without stopping the energization of the heater 10, and the abnormality of the vaporizing section 6 is detected. The temperature is increased in the same way up to the temperature level 95.

As a result, the temperature of the vaporizing section 6 changes from a temperature 90 of the conventional vaporizing section 6 of FIG. 8 to a temperature of 91 in the present invention, and the temperature of the vaporizing section 6 becomes abnormal at the initial stage of combustion. By raising the temperature to just before stopping the combustion at the temperature level, it is possible to suppress the temperature of the vaporization section from being lowered by the liquid fuel sent from the pump at the time of ignition, and to suppress the generation of tar due to the temperature drop. Thus, clogging of the vaporizing element 35 due to tar can be suppressed.

(Embodiment 2) In order to make Embodiment 1 more effective, the temperature of the vaporizing section 6 is raised to a temperature near the limit at which abnormal reset is performed at an abnormal temperature level 95 in the initial stage of combustion, and a high boiling point is obtained. The high temperature state must be maintained for a certain period of time until the fuel containing the oil completely softens. In the present embodiment, as shown in the flowchart of FIG. 6, by keeping the temperature at which the energization of the heater 10 is turned off only for a certain period of time from the beginning to a temperature near the abnormal temperature level 95 of the vaporizing section,
The vaporizing element 8 itself can be kept near the abnormal temperature level 95 for the time required to soften the components having a high boiling point in the fuel. As a result, the temperature change of the vaporizing section 6 of the present embodiment is indicated by 92 in FIG.
The temperature was kept at or above the temperature and near the abnormal temperature level 95 for 10 minutes, and then returned to the conventional heater ON / OFF level.

This not only suppresses the temperature fluctuation of the vaporizing section 6 when the heater is turned off, but also changes the temperature of the vaporizing element to move the point of vaporization, thereby effectively utilizing the entire vaporizing element. This has the effect of extending the clogging time of the vaporizing element.

As a result, the vaporization of the high boiling point in the different oils becomes more effective, and the decrease in the flow rate due to the different oils is almost eliminated.

(Embodiment 3) However, when a component having a boiling point higher than the abnormal temperature level 95 is mixed into the fuel, it cannot be removed in the above-mentioned embodiment, but accumulates inside the vaporizing element 8 and becomes tar. In the long term, there is a possibility that poor vaporization and clogging of the vaporization element 8 may occur. In the present embodiment, the heater 1
When the evaporator 6 is heated at 0, the temperature of the heater 10 is normally turned off when the temperature reaches a normal temperature level. If the temperature is higher than the level 95 and a short time in the early stage of the combustion, the temperature is set to a level at which there is no problem in the durability and safety of the vaporizer 6 and the heater 10, and the abnormal temperature level 95 is reset as shown in FIG. The temperature is changed to the abnormal temperature level B96 to make it higher than usual or to make it impossible to detect.

Alternatively, as the temperature at which the vaporizing section reaches an abnormal temperature level and stops the combustion in advance, the abnormal temperature level 9 at which the combustion must be stopped when the temperature reaches even instantaneously.
5 and an abnormal temperature level B96 at which combustion must be stopped when a predetermined time is maintained, and an operation switch is pressed when the heater is heated from the start of operation by the heater. The temperature at which the first heater is de-energized at the time is set between the normal temperature level of the vaporizing section and the temperature level A at which combustion must be stopped when the temperature reaches even instantaneously. A component having a higher boiling point that cannot be completely softened even near a temperature of level 95 is completely removed.

The flowchart at this time will be described with reference to FIG. The temperature is changed to an abnormal temperature level B96 which is higher than the abnormal temperature level 95 only at the beginning of combustion and higher than the temperature at which the power supply to the heater 10 is turned off for the first time. Next, when the temperature immediately before the heater abnormal temperature level temperature 96 shown in FIG.
Is turned off, and when the temperature of the vaporizing section 6 becomes equal to or lower than the conventional abnormal temperature level 95, the operating level of the abnormal temperature level is changed to the conventional abnormal temperature level 95.
And return to normal heater ON / OFF control.

As a result, it is possible to remove components having a high boiling point which could not be removed even in the vicinity of the excessive temperature limit, thereby maintaining stable combustion.

(Embodiment 4) This embodiment is different from the above embodiment in that the vaporizing section 6 is heated by the heater 10 from the start of operation to remove high-boiling components that could not be removed from the different kinds of oil. In contrast, the same control is normally performed during stable combustion.

The flowchart will be described with reference to FIG. The operation time of the pump 4 during combustion is counted, and when the predetermined time has been reached, the heater 10 is energized. Thereafter, the energization of the heater 10 is stopped before the temperature of the vaporizing section 6 reaches the abnormal temperature level 95, and To a high temperature. As a result, even if the liquid fuel combustion device is used continuously and the degraded oil is mixed in the middle, it is possible to remove the high-boiling components in the different oil at predetermined time intervals and maintain stable combustion. Becomes

[0047]

As described above, the liquid fuel combustion apparatus according to the present invention, when using a fuel mixed with a modified oil or a different component that has been stored and oxidized for a long time, in particular, a fuel containing a higher boiling point than kerosene. If mixed, the fuel that is not vaporized in the vaporization element generates tar, which causes poor vaporization and clogging of the vaporization element.In the early stage of combustion, the components of the high boiling point in the fuel are vaporized as much as possible. Tar can be prevented, clogging in the vaporizing element can be prevented, and tar can be removed without performing cleaning means.
In addition, since the fuel with a high boiling point is discharged during combustion, there is no problem such as generation of a large amount of white smoke or strong odor, and problems such as sticking of the nozzle which occurred when the cleaning unit is performed are solved. And good combustion can be continued for a long period of time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a liquid fuel combustion device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid fuel combustion device.

FIG. 3 is a block diagram of a control unit of the liquid fuel combustion device.

FIG. 4 is a flowchart showing the first operation;

FIG. 5 is a flowchart showing the operation 2;

FIG. 6 is a flowchart illustrating an operation 1 according to the second embodiment of the present invention.

FIG. 7 is a flowchart illustrating an operation 2 according to the third embodiment of the present invention.

FIG. 8 is a chart showing a change in temperature of a vaporizing section in each of the conventional example and the present invention.

FIG. 9 is a flowchart illustrating an operation according to the fourth embodiment of the present invention.

FIG. 10 is a sectional view of a conventional liquid fuel combustion device.

FIG. 11 is a sectional view of a main part of a conventional liquid fuel combustion device.

FIG. 12 is a flowchart showing the operation of a conventional liquid fuel combustion device.

[Explanation of symbols]

 2 Tank 4 Pump 6 Vaporizing section 10 Heater 11 Vaporizing section temperature detecting means 13 Nozzle section 13A Nozzle section hole 15 Electromagnetic valve 16 Needle valve 17 Burner section 25 Control section

Continuation of front page (72) Inventor Tohru Ueno 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A tank for storing liquid fuel, a pump for sucking and discharging fuel from the tank, a vaporizer for vaporizing fuel supplied by the pump, and a heater for heating the vaporizer. Temperature detection means for detecting the temperature of the vaporizing section, a nozzle for ejecting fuel vaporized in the vaporizing section, an electromagnetic valve for opening and closing the nozzle, and a burner section for burning the ejected vaporized gas, In order to maintain the temperature of the vaporization section in a predetermined temperature range, energization of the heater is turned ON by a signal from the temperature detection means of the vaporization section.
A normal temperature level for OFF control, and a temperature control unit for stopping combustion when the temperature of the vaporizing unit exceeds the normal temperature level and reaches a predetermined abnormal temperature level,
The temperature controller turns off the first heater after the start of operation.
A liquid fuel combustion device wherein the temperature level at which F is performed is set between a normal temperature level and an abnormal temperature level. 2. The temperature control section is provided with a timer which is started at the same time as the operation is started, and the timer is set during a time when the vaporization section reaches an abnormal level of the vaporization section at a temperature higher than a temperature level at which normal heater energization is turned off. 2. The method according to claim 1, wherein
A liquid fuel combustion device as described. 3. When heating the vaporizing section with a heater from the start of operation, the temperature control section turns on the first heater after the start of operation.
2. The temperature level to be applied is set between the normal temperature level and the abnormal temperature level, and the temperature level is maintained between the normal temperature level and the abnormal temperature level for a certain period of time.
Or the liquid fuel combustion device according to 2. 4. A temperature level at which the first heater is turned off when the operation switch is turned on is set to be equal to or higher than the abnormal temperature level of the vaporizing section. 4. The liquid fuel combustion device according to claim 3, wherein the abnormality detection level is increased or the detection is not possible while the normal abnormal temperature level is exceeded. 5. An abnormal temperature level A at which the combustion must be stopped when the temperature reaches an instantaneous temperature, and a combustion when the vaporizing section is maintained for a predetermined time. Two abnormal temperature levels of abnormal temperature level B that must be stopped are provided, and when heating the vaporization section with a heater from the start of operation, the temperature at which the first heater is de-energized when the operation switch is pressed,
A liquid fuel combustion apparatus characterized in that the temperature is set between a normal temperature level of the vaporization section and an abnormal temperature level A at which combustion must be stopped when the temperature reaches even instantaneously. 6. A control unit capable of storing a combustion time of the liquid combustion device, wherein the heater is forcibly heated by a heater at predetermined time intervals, and a temperature of the vaporization unit is set between a normal temperature level and an abnormal temperature level. The liquid fuel combustion device according to any one of claims 1 to 5, wherein the temperature is maintained at: