KR19980077432A - Control method of combustion device - Google Patents

Abstract

The present invention relates to a control method of a combustion device, and more particularly, to a control method of a combustion device to optimally control the temperature of the burner provided in the vaporization device of the combustion device.

The constitution is a control method of a combustion device in which a calorific value is variably controlled in accordance with a difference between a temperature of a harmonic space and a desired set temperature of the harmonic space, wherein Determination step of determining whether unstable combustion condition when heating is performed by the normal step combustion step to set the calorific value, normal step combustion step. Heating is performed by a preset step combustion step set to have a.

That is, the control method of the combustion apparatus according to the present invention is to compensate for the temperature drop of the burner by performing a higher heating step step control by determining that this is an unstable combustion condition when a voltage below the rated value is applied in the low heating step step control. Therefore, incomplete combustion can be fundamentally solved due to the temperature compensation of the burner, thereby realizing comfortable heating.

In addition, the frequent energization of the heater due to unstable combustion conditions can be excluded to provide an excellent effect of lowering the power consumption of the combustion device.

Description

Control method of combustion device

The present invention relates to a control method of a combustion device, and more particularly, to a control method of a combustion device to optimally control the temperature of the burner provided in the vaporization device of the combustion device.

In general, the combustion apparatus is provided with a step control system to finely control the amount of heat generated to increase energy efficiency. This will be described with reference to FIGS. 1 and 2 as follows.

FIG. 1 schematically shows a vaporization apparatus of a general combustion device, and its configuration includes a heater (not shown) to supply fuel to a burner 1 and a burner 1 for vaporizing fuel injected therein. The brow motor 70 for mixing the vaporized fuel with air by preheating the electronic pump 90 and the burner 1 for the ignition, the ignition electrode 81 and the ignition transformer 80 for igniting the vaporized fuel, and ignition Frame rod 82 for detecting the.

2 is a control flowchart of a combustion device including the above-described components. When the operation switch of the oil fan heater, which is a combustion device, is turned on and energized, a current is applied to a heater (not shown) to preheat the burner 1. (10a). When the preheating temperature of the burner 1 reaches a temperature suitable for vaporizing fuel (20a), the brow motor 70 is driven (30a), the ignition transformer 80 is energized to discharge a high voltage (40a), and an electronic pump The engine 90 is driven to supply fuel to the burner 1 (50a). Therefore, the fuel supplied from the electronic pump 90 is vaporized by the preheating of the burner 1, which is mixed with air by the brow motor 70 to easily ignite during high voltage discharge of the ignition transformer 80. To this. At this time, the flame current is sensed by detecting the salt current flowing through the flame from the frame rod 82. When a normal ignition is made, a constant voltage value is output. Accordingly, the output value is compared with a predetermined voltage value and its magnitude is determined to determine whether it is normal ignition (60a). If the output value falls below the preset value in the judging step 60a, the re-ignition and judging steps are attempted up to two times after a predetermined time (10b, 20b). ), The ignition transformer 80 and the electronic pump 90 are turned off to stop the operation of the combustion device (30b). In addition, when it is determined that the normal ignition in the determination step (60a) is driven to the combustion chamber for a predetermined time to enter the complete combustion and stable combustion of the fuel (70a). After that, when the predetermined time elapses (80a), step control is performed according to the difference between the room temperature and the desired set temperature of the user (90a).

Step control is programmed to control the amount of heat generated according to the difference between the room temperature and the desired set temperature in advance. This is because each fuel supply amount and the air flow amount is programmed for each step, thereby controlling the amount of heat generated according to the step change according to the difference between the user's desired set temperature and the room temperature.

However, the following problems are derived from the control method of the combustion device as described above.

That is, when it is determined that the set time has elapsed in the determination step 80a, step control programmed in the microcomputer is performed. At this time, if the difference between the room temperature and the desired temperature set in the combustion device is small, the microcomputer determines that it is the weakest combustion condition and performs the lowest step control. When a voltage below the rated value is applied to the burner under such a weak combustion condition, the temperature of the burner is lowered due to a decrease in the amount of heat generated by the heater. The lowering of the burner temperature causes the fuel to be incompletely vaporized, resulting in contamination of indoor air due to tar and soot during combustion.

In addition, the power consumption is increased according to the frequent energization of the heater to compensate for the lower burner temperature.

The present invention has been made to solve the above-described problems, even if it is determined to be the weakest combustion condition in the microcomputer if the unstable combustion condition occurs, the burner temperature is automatically performed to perform a step step to maintain a constant temperature It is to provide a control method of a combustion device.

1 is a schematic view showing a vaporization apparatus of a general combustion device,

2 is a control flow chart of a general combustion device,

3 is a control block diagram of a combustion device according to the present invention;

4 is a control flow diagram of a combustion apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: burner 70: blow motor

80: ignition transformer 81: ignition electrode

82: frame load 90: electronic pump

According to an aspect of the present invention, there is provided a control method of a combustion device that variably controls a calorific value according to a difference between a temperature of a harmonic space and a desired set temperature of the harmonic space, wherein the temperature of the harmonic space and the harmonic space are adjusted. In the normal step combustion step of setting the calorific value by the difference between the desired set temperature of the step, the judgment step of determining whether the unstable combustion condition when heating is performed with the heat value set in the normal step combustion step, if the unstable combustion condition is determined in the determination step The heating is performed by a preset step combustion step which is set in advance so as to have a heat generation amount larger than the heat generation amount set in the normal step combustion step.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a control block diagram of a combustion apparatus according to the present invention, which will be described with reference to the following.

Fuel evaporated by the preheated burner 1 and the heater 60 for preheating the burner 1 by the operation unit 20 for inputting an operation reservation, a desired temperature and an operation function, etc. Blower motor 70 for mixing with air, ignition transformer 80 for ignition by discharging high voltage to vaporized gas, electronic pump 90 for supplying fuel for combustion from oil tank to burner 1, heater ( 60, a voltage sensing unit 30 for sensing the magnitude of the voltage applied to the burner, a burner temperature sensing unit 40 for sensing the temperature of the burner 1, and an indoor temperature sensing unit for detecting the current indoor temperature ( 50), the display unit 100 for indicating the operation state of the combustion device and the abnormality such as overheating, the power supply unit 10 for operating the control circuit of each component and the microcomputer for controlling the operation of the entire combustion device ( 200).

Combustion equipment composed of such components is generally made by step control during combustion, in order to increase energy efficiency by sequentially controlling the calorific value of the combustion equipment in accordance with the difference between the room temperature and the desired set temperature. In other words, if the indoor temperature and the user's desired set temperature show a big deviation in the initial operation, the heating value is increased by the step control of high level, and heating is performed. If the temperature deviation gradually decreases, the heating value is reduced by the step control of low level. The heating is performed to be close to the user's desired set temperature. To this end, the fuel supply amount and the air flow amount for each step is programmed in the microcomputer 200, and the intake air amount control through the fuel supply amount control by the frequency control of the electronic pump 90 and the rotation speed control of the brow motor 70 The amount of heat generated for each step is controlled.

4 is a control flowchart according to the present invention showing a combustion device for performing such step control, which will be described below.

First, when the operation switch of the petroleum fan heater, which is a combustion device, is turned on and energized, a current is applied to the heater 60 to preheat the burner 1 (10a).

When the temperature of the preheated burner 1 reaches a temperature suitable for vaporizing fuel (20a), the brow motor 70 is driven (30a), and the ignition transformer 80 is energized to discharge the high voltage (40a). In addition, the electronic pump 90 is driven to supply fuel to the burner 1 (50a). Therefore, the fuel supplied from the electronic pump 90 to the burner 1 is vaporized by the preheating of the burner 1, which is mixed with air by the brow motor 70, so that the high voltage of the ignition transformer 80 is achieved. Easily leads to ignition during discharge. At this time, the flame current is sensed by detecting the salt current flowing through the flame from the frame rod 82. When a normal ignition is made, a constant voltage value is output. Accordingly, a determination step of comparing the output value with a predetermined voltage value and its magnitude is performed (60a).

If the output value falls below the preset value in the judging step 60a, if a predetermined time elapses, the re-ignition and judging step 60a are attempted up to two times (10b, 20b). The brow motor 70, the ignition transformer 80, and the electronic pump 90 are turned off to stop the operation (30b).

In addition, when it is determined that the normal ignition in the determination step (60a) is driven to the combustion chamber for a predetermined time to enter the complete combustion and stable combustion of the fuel (70a). After that, if it is determined that the predetermined time has elapsed (step 80a), step control is performed according to the difference between the room temperature and the desired set temperature of the user (81a).

Then, it is determined whether the current combustion condition is an unstable combustion condition during the step operation of step 81a (82a). That is, as an example, when the power applied to the lowest heat generation step control is less than the rated value, it is determined as an unstable combustion condition. This is because, as described above in the above-mentioned problems, the possibility of non-combustion is rich.

Therefore, if it is determined that the unstable burning condition is determined in the determination step 82a, the setting step burning input to the program in advance is executed (83a). This is to overcome the non-combustion in the unsafe combustion condition by performing the step control. That is, when the upper step control is performed, the fuel supply amount and the intake air amount are increased more than the currently selected step control, and the heat generation amount is also increased. Therefore, the burner temperature is maintained above a certain temperature by the increase in the amount of heat generated to satisfy the conditions of complete combustion.

When the operation of the setting step burnout step 83a elapses a predetermined time (84a), if it is determined that the safe combustion condition is performed after the unsafe burn condition determination step 82a is performed again, the normal step burnout step 90a is performed, and continues. When it is determined that the unstable combustion condition is determined, the setting step burning step 83a, the setting time elapsed determining step 84a, and the unstable burning condition determining step 82a are repeatedly performed.

In addition, this invention is not limited to the said Example, It can change and implement variously in the range which does not deviate from the summary.

As described above, in the method of controlling a combustion device according to the present invention, when a voltage lower than the rated value is applied in the low calorific value step control, it is determined that it is an unstable combustion condition to compensate for the temperature drop of the burner by performing the upper calorific value step control. It is.

Therefore, incomplete combustion can be fundamentally solved due to the temperature compensation of the burner, thereby realizing comfortable heating.

In addition, the frequent energization of the heater due to unstable combustion conditions can be excluded to provide an excellent effect of lowering the power consumption of the combustion device.

Claims (3)

In the control method of the combustion apparatus for varying the amount of heat generated according to the difference between the temperature of the harmonic space and the desired set temperature of the harmonic space, A normal step combustion step of setting a calorific value by a difference between a temperature of the harmonic space and a desired set temperature of the harmonic space; Determination step of determining whether the unstable combustion conditions when performing the heating by the heat amount set in the normal step combustion step, And if it is determined that the unstable combustion condition occurs in the determination step, heating is performed by a preset step combustion step set in advance so as to have a heat generation amount larger than the heat generation amount set in the normal step combustion step. The method of claim 1, wherein the unstable combustion conditions And the lowest heat generation amount is set in the normal step combustion step, and the voltage applied to the combustion device is a predetermined value or less than a rated voltage. The method of claim 1, A second determination step of determining whether the unstable combustion condition occurs when heating by the setting step combustion step has elapsed; The control method of the combustion apparatus, characterized in that the normal step combustion step is performed if it is determined that the safe combustion condition in the second determination step, and the second determination step is continuously performed if it is determined that the unsafe combustion condition.