JP2671496B2 - Oil combustor control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to electric power control of a vaporization heater in an oil combustor that vaporizes and combusts an oil fuel such as petroleum.

2. Description of the Related Art Conventionally, as shown in FIG. 5, a conventional control device of this type has a commercial power supply 1 in series with a heater 2 for vaporization, an energization controller 3,
The fuse 4 and the temperature control switch 5 are connected, and the vaporization part temperature is input by a thermistor 6 or the like that detects the temperature of the vaporization part, and the energization control part 3 is turned on to keep the set temperature constant.
It is composed of the microcomputer 7 and the like having a built-in program for outputting an energization control signal such as OFF. Therefore, the heater 2 inputs the amount of electric power proportional to the energization period of the energization control signal, and generates heat of vaporization corresponding to the amount of electric power.

However, in the above-described configuration, the resistance of the heater 2 is fixed, and the rush current into the heater becomes excessive at the start of energization of the heater. Also, when the power supply voltage rises, the current consumption of the heater becomes excessive, which may cause the breaker to fall, the fuse to blow, and the like. On the other hand, the time required to reach the set temperature of the vaporization section is usually several minutes with an oil fan heater or the like,
It was necessary to shorten the waiting time from the time the power was turned on until the hot air was blown out. In particular, in an oil combustor that instantaneously supplies hot water by the heat of combustion of vaporized oil, shortening the waiting time from when the power is turned on until the temperature reaches the vaporizable temperature has been a major issue.

The present invention solves such a conventional problem, and an object of the present invention is to minimize the waiting time until the vaporization part set temperature is reached and, at the same time, to stably supply electric power to the oil combustor.

Means for Solving the Problems In order to solve the above problems, the control device for an oil combustor of the present invention is an energization control unit that controls the energization power amount of a heater,
A current detection unit that detects the current consumption of the entire oil combustor or the current consumption obtained by excluding the steady current consumption of the temperature detection unit, etc. from the entire oil combustor, the current detection value from the current detection unit, and a predetermined excess current limit A current comparison unit that compares the value and outputs a current comparison determination signal, and a temperature detection signal from the temperature detection unit,
When the current comparison determination signal is input, the energization control signal is output to the energization control unit according to the comparison result of the temperature detection signal and the heater set temperature, and when the detected power value exceeds the current limit value. And a heater power control section for outputting an energization control output signal for reducing the power consumption of the heater by a predetermined amount.

Effect With the above-described configuration, the present invention shortens the time required to reach the set temperature by supplying the vaporization unit with an electric energy equal to or more than the vaporization electric energy when the vaporization unit heats up when the power is turned on (rises). At the same time, in this case, the current consumption of the oil combustor is constantly monitored to prevent the breaker breaker, etc. from flowing into the oil combustor with a current exceeding a predetermined amount, and the heater power is detected when the predetermined current limit value is detected. Reduce the amount to a predetermined level. Therefore, without interrupting the power supply to the oil combustor,
In addition, it is possible to reach the vaporization part set temperature in the shortest time, and it is possible to shorten the waiting time for hot air and hot water supply when starting up the operation.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same members as those in FIG. 5 of the conventional example are designated by the same reference numerals.

In FIGS. 1 and 2, the vaporizer 8 has a heater 2
Is built in and is connected so as to send vaporized oil to the burner 9. The temperature of the vaporizing section 8 is detected by the temperature detecting section 6,
It is output as a temperature detection signal. The current consumption of the entire oil combustor is the current detection section (circuit using current transformer 10).
It is connected so as to be detected by 11 and output to the current comparison unit 12. A current limit value 13 is also input to the current comparison unit 12 as an upper limit of a predetermined operation allowable range. The temperature detection signal from the temperature detection unit 6 and the current comparison determination signal from the current comparison unit 13 are input, a power control signal (phase control signal) is output to the energization control unit 3, and vaporization is performed to the vaporization unit 8. A heater power control unit (including a microcomputer and the like) 15 is connected so as to output an oil feed control signal to a combustion oil oil feed unit (electromagnetic pump or the like) 14 that feeds oil.

It should be noted that the heater 2 has a resistance capacity such that when the normal commercial power source is used, the heater maximum output power> the maximum vaporization power at the lowest temperature in the operating temperature range.

In the above-described configuration, the operation of the control device for the oil combustor will be described with reference to the flowchart of FIG. 3 and FIG. 4, mainly regarding the heater and energization power control. (Stop) is detected by an operation switch (not shown) or the like, and if the operation is stopped, the heater power control unit 15 outputs a heater off signal to the energization control unit 3.

Since the operation is in the on state, the heater power control unit 15 compares the temperature detection value from the temperature detection unit 6 with a predetermined set temperature value to make a determination. If the heater temperature detection value> the set temperature value, a heater off signal is output to the energization control unit 3.

Since the heater temperature detection value <the set temperature value, the heater power control unit 15 inputs the current comparison determination signal from the current comparison unit 12.

When the current comparison determination signal is an output indicating the current detection value> the current limit value, the heater power control unit 15 reduces the energization phase angle of the heater to the energization control unit 3 (heater on when the zero cross signal of the power supply waveform is detected. Is sent, as shown in FIG. 4 (B).

When the current comparison determination signal is an output indicating the current detection value <current limit value, the heater power control unit 15 increases the energization phase angle of the heater to the energization control unit 3 (heater on when the zero cross signal of the power supply waveform is detected. The timing of is approached, as shown in FIG.

Due to the above, the heater power control unit 15 turns on the heater energization control signal whose timing has been adjusted from the time of the zero cross of the output power source, through the energization control unit 3.

Therefore, when the heater is turned on, the current consumption of the oil combustor is always kept below the specified current limit value, and the amount of electric power to the heater is maximized. The up time is greatly reduced. Furthermore, stable heater control can be performed even when the current and voltage fluctuate, without any troubles in use such as breaker interruption. In the above embodiment, the current detector is configured to detect the current consumption of the entire oil combustor, but the current consumption is detected by excluding the presumable steady current consumption of the control circuit such as the temperature detector. It is also effective to adopt the configuration.

Effects of the Invention As described above, according to the control device for an oil combustor of the present invention,
The following effects are obtained.

(1) Since the amount of electric power supplied to the heater at the time of energizing the heater is maximally provided at a predetermined total current consumption limit value or less, the heat-up time from the start of operation can be greatly shortened.

(2) It is possible to avoid the influence of increase or decrease in the amount of electric power supplied to the heater due to the influence of the power supply voltage or the like.

(3) Since the oil combustor can be operated at a predetermined total current consumption limit value or less, it is possible to avoid the occurrence of troubles in use such as breaker breakage and ensure safe operation.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of an embodiment of a control device for an oil combustor of the present invention, and FIG. 2 is a control block diagram of the control device.
FIG. 3 is a flow chart for explaining the operation of the control device,
FIG. 4 is an explanatory view showing the control state of the amount of electric power supplied to the heater of the control device, and FIG. 5 is a control circuit diagram of a conventional control device for an oil combustor. 2 ... Heater, 3 ... Energization control section, 6 ... Temperature detection section,
8 ... Vaporizer, 9 ... Burner, 11 ... Current detector, 12 ...
… Current comparison section, 15 …… Heater power control section.

Claims (2)

(57) [Claims] 1. A burner for burning vaporized oil, a vaporization section for supplying vaporized oil to the burner, a heater for generating vaporization heat in the vaporization section, and a temperature detection section for detecting the temperature of the vaporization section. An energization control unit that controls the energization amount of the heater, a current detection unit that detects the consumption current of the entire oil combustor, and a current detection value from the current detection unit and a predetermined current limit value are compared. , A current comparison unit that outputs a current comparison determination signal, a temperature detection signal from the temperature detection unit, and the current comparison determination signal are input, and energization control is performed on the energization control unit by comparison with the set temperature of the heater. A controller for an oil combustor, which outputs a signal and which outputs a conduction control signal for reducing the power consumption of the heater when the detected current value exceeds the current limit value. 2. A burner that burns vaporized oil, a vaporization section that supplies oil to the burner, a heater that generates heat of vaporization in the vaporization section, and a temperature detection section that detects the temperature of the vaporization section. An energization control unit that controls the energization amount of the heater; a current detection unit that detects a consumption current that excludes a steady consumption current such as the temperature detection unit from the consumption current of the entire oil combustor; and the current detection unit The current detection value from the predetermined current limit value is compared with, a current comparison unit that outputs a current comparison determination signal, a temperature detection signal from the temperature detection unit, and the current comparison determination signal is input, and A heater power control unit that outputs an energization control signal to the energization control unit by comparison with the set temperature of the heater and outputs an energization control signal that reduces the power consumption of the heater when the current detection value exceeds the current limit value. And E was an oil burner of the control device.