JPH03221718A - Controller for oil combustion device - Google Patents

Abstract

PURPOSE:To reduce an occurrence of white smoke and odor or the like at the time of ignition by a method wherein outputs of an air blower and an oil feeding means are made variable by a predetermined amount in response to whether the surface of a burner is sufficiently heated or not at the time of ignition. CONSTITUTION:When an operation is started, an air blower 11 inputs an output control signal at a time of pre-purging gradual ignition from a gasification combustion control means 15. In this case, since the ignition level of the air blower 11 is less than a temperature discriminating value 13 at the first gasification part, i.e., the first combustion after starting an operation at a normal temperature, it becomes an FK1 level. Then, an igniter 7 is turned on and a fuel at an ignition level (an oil amount) is outputted from an oil feeding means 5 to the gasification part 3. Upon completion of the combustion, and when the combustion is started, if an operation/stop signal of the operation adjusting device 10 is not turned off, the gasification part 3 is already kept at a temperature discriminating value at the second gasification part, the surface temperature of the burner 2 is not extremely decreased, so that the ignition level of the air blower 11 becomes an FK2 level. Levels of FK1 and FK2 for making the best igniting characteristic at the ignition and restricting the white smoke and odor to a minimum value are predetermined in the event that the surface temperature of the burner 2 is low or in the event that the surface temperature of the burner 2 is not low.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improving and increasing the ignition performance of an oil-burning machine that uses oil fuel such as petroleum.

BACKGROUND OF THE INVENTION A conventional control device of this type, for example, as shown in FIG. a vaporizing section 3; a heater 4 built into the vaporizing section 3 to vaporize oil; and an oil feeding means (such as a magnetic pump) 5 for supplying fuel oil to the vaporizing section 3;
A vaporizer temperature detection means (thermistor, etc.) 6 that detects the temperature of the vaporizer 3, and an igniter 7 that ignites vaporized oil to the burner 2.
, a combustion detection means (such as a flame rond) 8 that detects the ignition of the burner 2, and a hot water temperature detection means (such as a thermistor) 9 and 5 that detects the hot water temperature, and an operation controller 10 that operates, stops, and sets the hot water temperature. and a blower (composed of a DC fan motor, etc.) that sends combustion air to the burner 2.
1, an operation/stop signal and a hot water outlet temperature setting value signal from the operation controller 10, and an oil supply means 5. Combustion control means 12 that outputs output control signals to the blower 11 according to the amount of combustion.
It was composed of.

With this configuration, when the operation 11 moderator IO is turned on from off, the combustion control means 12 outputs an energization control signal to the heater 4 so that the vaporization section 3 maintains a predetermined set temperature,
When the valve is opened, the blower 11, igniter 7, and oil supply means 5 are output in sequence, and after ignition is detected by the combustion detection means 8, the operation controller 10
The outputs of the blower 11 and the oil supply means 5 were adjusted (so-called feed bank control) so that the outlet temperature was adjusted to the set temperature.

Problems to be Solved by the Invention However, in the above-mentioned I precept, the burner surface temperature differs greatly between starting operation from room temperature and during intermittent operation, and the burner surface temperature does not rise sufficiently when starting operation from room temperature. Even though the combustion control means outputs an output control signal at a predetermined ignition level to the blower and oil supply means when igniting, the ignition performance deteriorates due to condensation of oil droplets on the burner surface. However, there were problems with the generation of white smoke and odors.

The present invention solves the conventional v4 problem, and by ensuring the ignition performance of the oil combustor remains constant at the start of operation from room temperature and during intermittent operation, white smoke and odor generation at the time of ignition are constantly reduced. The purpose is to

Means for Solving the Problems In order to solve the above problems, the oil combustor control device of the present invention includes a vaporizing chamber temperature detecting means for detecting the temperature of the vaporizing section, and a temperature detection signal from the vaporizing chamber temperature detecting means. A temperature comparator unit that inputs the input temperature, compares it with a predetermined blackened part temperature judgment value, and outputs a comparison judgment signal; It inputs the comparison judgment signal from the temperature comparison section and the vaporization section temperature detection signal from the vaporization chamber temperature detection means, outputs an output control signal to the blower and oil supply means according to the combustion amount, and when starting the operation, and vaporization combustion control means for varying the output control signal to the blower and the oil feeding means by a predetermined amount at the time of ignition, depending on whether the comparison judgment signal from the temperature comparison section is lower than the predetermined blackened part temperature judgment value. It is something.

According to the above-described structure, the present invention varies the output of the blower and the oil supply means at the time of ignition by a predetermined amount depending on the salinity value detected in the vaporizing section at the start of operation, that is, depending on whether the burner surface is sufficiently warmed or not. . In other words, when the burner surface is cold, the predetermined level of air-fuel ratio (ratio of combustion air from the blower to oil fuel from the oil supply means, hereinafter referred to as air-fuel ratio) is set to excess fuel to improve ignition. On the other hand, if the burner is sufficiently salty, the air-fuel ratio is returned to the predetermined normal setting, and the ignition performance is always maintained constant by igniting at an air-fuel ratio that corresponds to the burner surface salinity. Therefore, the generation of white smoke, odors, etc. can be constantly reduced.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

Note that the same members as in the conventional example shown in FIG. 3 are given the same numbers.

FIG. 1 is a control configuration diagram of the oil water heater of the present invention. 13
is the first blackened part temperature judgment value (for example, KTl 200
°C. L13' is the second blackened part temperature judgment value (
For example, let K T 2 =300°C. ), I4 is a temperature comparison unit that compares the temperature detection signal from the vaporization chamber temperature detection means 6 with the first and second blackened portion temperature judgment values and outputs a comparison judgment signal; 15 is a temperature comparison unit; The comparison determination signal from the section 14, the outlet hot water temperature detection signal from the outlet hot water temperature detection means 9, the operation/stop signal from the operation controller 10, and the combustion detection signal from the combustion detection means 8 are inputted, and the heater 4
The energization output control signal is sent to the oil feeding means 5. This is vaporization combustion control means that outputs an output control signal to the blower 11 according to the amount of combustion.

In the above configuration, the operation is explained as shown in (a) in Fig. 2.
It becomes like the time chart shown in ~(f). ab, c
, d, e, and f are respectively the operation/stop signal of the operation regulator 10, the temperature of the blackened part, the output control signal to the blower 11, the operation signal to the igniter 7, and the output control signal to the oil feeding means 5. This is the time characteristic of the combustion detection signal of the combustion detection means 8. t=t
When the operation liiwrJ device 10 is switched from stop to operating state at step 1, an energization output control signal is output to the heater 4,
Preheating of the vaporization section 3 is started. After that, the temperature of the vaporizer reaches the second level.
The vaporizing section temperature judgment value (KT2) is maintained. After this,
At 1=12, the caran is opened and the combustion operation is started.

First, the blower 11 manually outputs an output control signal from t=t2 to t, ``'' t3 for pre-purge (pre-combustion exhaust 2F1), and slow ignition from t=t3 from the vaporization combustion control means i5. In this case, the ignition level of the blower 11 is equal to or lower than the first blackened part temperature judgment value 13 at the start of operation, that is, since this is the first combustion after the start of operation at room temperature, FK in Figure (C)
Becomes I level. Next, at t=-t4, the igniter is turned on, and at t=t5, a huge hell (○L) is emitted from the oil supply means 5.
K) of fuel (oil amount) is output to the vaporization section 3. t=t6
The combustion detection means 8 detects ignition at t = t
At step 7, the vaporization combustion control means 15 outputs an output control signal according to the combustion amount based on the set temperature of the J modulator 10 and the outlet temperature.

Furthermore, when combustion is completed once and combustion is started again, that is, during intermittent operation, unless the operation/stop signal of the operation U @ moderator 10 is turned off, the vaporizing section 3 is maintained at the second vaporizing section temperature judgment value. Therefore, the surface temperature of the burner 2 does not drop extremely. Therefore, in this case, the ignition level of the blower 11 at the start of combustion is PK2 level as shown in Figure (C). FKI
PX3 is set at a level that maximizes ignition performance and minimizes white smoke and odor when the surface temperature of burner 3 is low and when it is not, respectively.

Therefore, depending on the burner surface temperature at the start of combustion, the air-fuel ratio setting during slow ignition can be selected to a predetermined level, ensuring flame transferability at the time of ignition, and as a result reducing white smoke, odors, etc. This will result in a significant reduction.

Note that, as in the above embodiment, the air-fuel ratio setting at the time of ignition is not limited to only the blower output, but it is also possible to vary the output to the oil feeding means. Further, the vaporizing section is not limited to having a heater as in the above embodiment, but the same effect can be obtained with a heaterless structure in which combustion heat is received from a so-called burner and vaporized.

In addition to the effects of the invention, the oil combustor control device of the present invention provides the following effects.

(1) The ignition performance of the oil combustor was measured at the start of operation from room temperature.
By ensuring a constant level regardless of intermittent operation, it is possible to constantly reduce the generation of white smoke and odor during ignition.

(2) By improving the fire transferability during ignition, the start-up response (heating rate, etc.) is improved.

[Brief explanation of drawings]

Fig. 1 is a control diagram of an oil water heater according to an embodiment of the present invention, Fig. 2 is a time chart showing the operating characteristics of the control device of the same machine, and Fig. 3 is a diagram of the control device of a conventional oil combustor. FIG. 2... Burner, 3... Vaporizing section, 5...
. . . Oil feeding means, 6 . . . Vaporization part stratification detection means,
11... Blower, 13... Evaporating section temperature judgment value, 14... Temperature comparison section, 15...
Vaporization combustion control means.

Claims (1)

[Claims] a vaporizer that vaporizes oil; a burner that burns the vaporized oil vaporized by the vaporizer; a blower that sends combustion air to the burner; and an oil feeder that sends oil to the vaporizer according to the amount of combustion. , a vaporizing section temperature detection means for detecting the temperature of the vaporizing section; and a temperature comparison that inputs a temperature detection signal from the vaporizing section temperature detection means, compares it with a predetermined vaporizing section temperature judgment value, and outputs a comparison judgment signal. an operation controller for setting operation and stop, an operation and stop signal from the operation controller, a comparison judgment signal from the temperature comparison section, and a vaporization section temperature detection signal from the vaporization section temperature detection means. and outputs an output control signal to the blower and the oil feeding means according to the combustion amount, and at the start of operation, the comparison judgment signal from the temperature comparison section is higher than the predetermined vaporizing section temperature judgment value. A control device for an oil combustor, comprising: vaporization combustion control means for varying an output control signal to the blower and oil supply means by a predetermined amount at the time of ignition depending on whether the temperature is low or low.