KR19980072595A - Drive control device of combustion device - Google Patents

Abstract

The present invention relates to a drive control device for a combustion device, and more particularly, to a drive control device for a combustion device to detect the occurrence of abnormal conditions during combustion to stop the combustion.

To this end, the present invention detects the combustion state of the fuel by the ignition detection unit 50 and outputs a voltage signal corresponding to the detected combustion state of the fuel, according to the first comparator OP1 and the first comparator OP1. And a driving control unit for controlling the driving of the electronic pump 81 by judging occurrence of an abnormal state during combustion by the second comparator OP2 comparing the output signal with a predetermined constant reference voltage.

Description

Drive control device of combustion device

The present invention relates to a drive control device for a combustion device, and more particularly, to a drive control device for a combustion device to detect the occurrence of abnormal conditions during combustion to stop the combustion.

In general, a combustion apparatus includes a combustion furnace in which fuel combustion occurs, a heat exchanger for heating the room by heat-exchanging air heated by heat generated by the combustion furnace with indoor air, and injecting fuel mixed with air to the combustion furnace. It is provided with a burner unit to be ignited, and an indoor fan that introduces indoor air and is heated by the combustion furnace and heat exchanger and then forcedly discharged into the room.

In addition, the burner unit discharges waste gas in the combustion furnace to the outside through an exhaust pipe and introduces air for combustion, an electronic pump for atomizing and injecting fuel pumped from the fuel tank, and a high voltage And an igniter for generating and igniting the fuel injected from the electronic pump, and an ignition detection unit for detecting whether the fuel is ignited by the igniter and the combustion state of the fuel.

In the conventional combustion apparatus, when the operation is started by the key operation by the user, the heater is operated to preheat the burner to a predetermined temperature to maintain the proper vaporization temperature of the fuel, and when the temperature of the burner is preheated to a predetermined temperature, the burner fan and the igniter Will be driven. In addition, the electronic pump is driven to pump the fuel from the fuel tank and atomize it into the burner, wherein the fuel injected into the burner is mixed with the air supplied by the burner fan to be ignited by the spark generated by the igniter. do. In addition, the ignition detector stops the discharge of the igniter when a flame is detected due to the combustion of the fuel ignited by the igniter. Thereafter, the ignition detection unit detects the combustion state as the combustion operation of the fuel is performed and outputs a detection signal to the microcomputer, and the microcomputer controls the combustion operation by identifying the combustion state of the fuel.

However, in the drive control apparatus of the conventional combustion apparatus, when an abnormal state occurs during combustion, the combustion should be stopped immediately. In the process of stopping the combustion by determining the abnormal state by the flame detection unit, the microcomputer is caused by other noise. The misjudgment and abnormality judgment of the engine were delayed, which caused problems such as the occurrence of odor due to incomplete combustion of fuel due to the occurrence of abnormal state during combustion.

Accordingly, the present invention has been made in order to solve such a conventional problem, the purpose of which is to determine the occurrence of abnormal state during the combustion operation of the fuel, the drive control device of the combustion apparatus to be able to extinguish the supply of fuel immediately shut off Is to provide.

1 is a control block diagram showing a schematic configuration of a combustion apparatus according to the present invention;

2 is a detailed circuit diagram of a drive control apparatus for a combustion device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: control unit 20: key operation unit

30: power supply unit 40: preheat detection unit

50: ignition detection unit 60: indoor fan drive unit

70: burner motor 71: burner fan

80: electronic pump driving unit 81: electronic pump

90: igniter.

In order to achieve the above object, a driving control apparatus for a combustion device according to the present invention includes a ignition detector for detecting a combustion state of a fuel and a first comparator for outputting a voltage signal corresponding to the combustion state of the fuel as a result of the detection of the ignition detection unit. And a second comparator for determining occurrence of an abnormal state of the ignition detector by comparing the output signal of the first comparator with a predetermined reference voltage and turning off the driving of the electronic pump pumping fuel according to the output signal of the second comparator. Characterized in that the drive control unit.

Further, the drive control section of the present invention includes a transistor turned on and off in response to the output signal of the second comparator, and a transistor having a base end connected to a collector end of the transistor and an electron pump connected to the collector end.

Hereinafter, the configuration and the effect according to the preferred embodiment of the present invention will be described in detail.

First, Figure 1 is a control block diagram showing a schematic configuration of a combustion apparatus according to the present invention. As shown, the control unit 10 for controlling the driving of the combustion device as a whole, the key operation unit 20 for receiving the key operation signal from the user, the power supply unit 30 for supplying the driving power, and the indoor air An indoor fan driver 60 for controlling the operation of an indoor fan that is forced to discharge into the room after inflow and heat exchange, and a burner fan 71 for discharging waste gas in the combustion furnace to the outside through an exhaust pipe and introducing air for combustion; A burner motor 70 for driving the burner fan 71, a preheating sensing unit 40 for sensing a temperature inside the burner to detect the completion of preheating inside the burner by the driving of the heater in the initial stage of driving; An electronic pump 81 pumping fuel from a fuel tank and supplying the fuel to the burner, an electronic pump driver 80 controlling the driving of the electronic pump 81, and air supplied from the electronic pump 81. Ignited fuel And a igniter 90 and the igniter spark detector 50, which detects whether or not the combustion state of the ignition of the fuel and fuel by 90.

In this configuration, the electronic pump driver 80 has a circuit configuration as shown in the detailed circuit diagram shown in FIG. That is, the electromagnetic pump driving unit 80 controls the driving of the electronic pump 81 according to the combustion state. The comparator OP1 has a spark between the ignition detecting unit 50, that is, the frame rod FR and the burner. The voltage bias is formed on the resistor R4 to generate a constant output value, and the output value changes according to the combustion state.

On the other hand, in the comparator OP2, when the ignition detecting unit 50 is shorted, its output value is changed from a low level to a high level to turn on the transistor Q1. Thus, the transistor Q2 is turned off to cut off the driving power applied to the electron pump 81 connected to the collector stage. Therefore, when the burner and the ignition detection unit 50 are shorted due to burner overheating and component reliability problems, the combustion of the fuel is stopped by automatically stopping the driving of the electronic pump 81 and cutting off the fuel supply to the inside of the burner. In addition, the transistor Q2 receives a driving signal from a microcomputer (not shown) to a base end thereof, and may be turned on and off to control the driving of the electronic pump 81 at the start and stop of combustion.

As described above, the flame detection unit for detecting the flame according to the combustion state of the fuel is detected by the drive control device of the combustion apparatus according to the present invention to short-circuit the burner to immediately drive the electronic pump during abnormal operation of the flame detection unit. By stopping the combustion of the fuel, it prevents incomplete combustion of the fuel and maintains a safe state.

Claims (2)

An ignition detector 50 for detecting a combustion state of fuel, a first comparator OP1 for outputting a voltage signal corresponding to the combustion state of the fuel as a result of the detection of the ignition detector 50, and the first comparator According to the output signal of the second comparator OP2 and the second comparator OP2 which compares the output signal of OP1 with a predetermined reference voltage to determine the occurrence of an abnormal state of the ignition detection unit 50. Drive control device for a combustion device characterized in that it comprises a drive control unit for turning off the drive of the electronic pump (81) for pumping. The transistor of claim 1, wherein the driving control unit is connected to a transistor Q1 turned on and off in response to an output signal of the second comparator OP2, and a base end thereof is connected to a collector end of the transistor Q1. And a transistor (Q2) to which an electromagnetic pump (81) is connected.