JPH08152921A - Combustion control system - Google Patents

Abstract

PURPOSE: To prevent the operation from being easily started again when any abnormality is detected and the operation is stopped, and to improve the repairability of this system. CONSTITUTION: When any abnormality is detected, an operation stopping means 13 stores abnormality detection data in a storage part 4 and stops the operation. When a commercial power source 1 is turned off, a power source 5 for backup stores and holds the abnormality detection data. Only when switches 7a, 7b and 7c are operated by a specified procedure, the abnormality detection data can be cleared. Even if the commercial power source 1 is turned on again by the power source 5 for backup, the abnormality detection data are not cleared. When a specified operation is performed, without disassembling a main body, the reproducing test of the abnormal operation can be performed by operating the system again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control device for storing an abnormality in an operating state in a storage unit of a microcomputer to forcibly stop its operation.

[0002]

2. Description of the Related Art Generally, a combustion control device such as an oil heater of this type issues a detection signal from various detection means for detecting room temperature, a carburetor temperature, a combustion state and the like, and commands an operation start and a set temperature. Based on an operation signal from an operation means having a plurality of switches, a microcomputer having a storage unit performs a series of combustion controls from the start of combustion to the completion of combustion. When the microcomputer detects an abnormality that impairs operation, such as an abnormal increase in the temperature detected by the carburetor, based on the detection signal from the detection means, the microcomputer stores the abnormal state such as the cause of the abnormality. Equipped with operation stop means to stop the operation, unless you clear the abnormality detection data in the storage unit,
It is not possible to restart.

[0003]

In the above-mentioned prior art, when the commercial power supply is turned on again after the abnormality is detected and the operation is stopped, the microcomputer is reset and the abnormality detection data in the storage unit is cleared. However, there is a problem that the driving operation is accepted although the vehicle is in a dangerous state. On the other hand, if an abnormality is detected and the operation is stopped, the abnormality detection data in the storage unit cannot be cleared in any case. If it is not disassembled, it will not be possible to easily perform a reproduction test of abnormal operation due to restarting.

In view of the above problems, therefore, the present invention makes it possible not to simply restart the operation when an abnormality is detected and the operation is stopped, and the repairability of the apparatus can be improved.

[0005]

A combustion control device according to the present invention is based on a detection signal from a detection means for detecting room temperature and a carburetor temperature, and an operation signal from an operation means having a plurality of switches. A series of combustion controls by a microcomputer provided with a storage unit, and a combustion unit provided with an operation stopping unit for stopping the operation by storing the abnormal state in the storage unit when an abnormality is detected by the detection signal of the detection unit. In the control device, a power supply backup means for holding the stored contents of the storage portion when the main power supply is off, and an abnormality detection data stored in the storage portion when the operating means is operated in a specific procedure A driving prohibition canceling means for canceling the driving prohibition is provided.

[0006]

According to the above configuration, when the operation stop means detects an abnormality and the operation is stopped, even if the power supply from the power supply is cut off, the abnormality detection data stored in the storage unit by the backup power supply remains unchanged. Retained. Therefore, even if the power is subsequently turned on again, the microcomputer is not reset and the abnormality detection data in the storage unit is not cleared, and the operation stopped state can be continued. In addition, since the abnormality detection data stored in the storage unit can be cleared by the operation stop release unit by operating the switch of the operation unit in a specific procedure, it is possible to restart the unit without disassembling the main unit. Easily perform failure operation reproduction test.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 showing the electrical configuration, 1 is a commercial power source which is a main power source, and this is a main power source for a microcomputer 2 and a combustor 3 provided in an oil heater.
An alternating voltage of 100 V is supplied. The microcomputer 2 stores a program for executing a predetermined control sequence in advance and stores the program in a readable / writable RAM for storing various data, as well as a control unit and an arithmetic unit that constitute a microprocessor (not shown). And an input / output unit. Reference numeral 5 is a backup power source as a power source backup means for holding the contents stored in the storage unit 4 when the commercial power source 1 is not conducting. When the AC power source from the commercial power source 1 is cut off, a predetermined power source is supplied to the microcomputer 2. .

To the input port side of the microcomputer 2, an operating means 7 having a plurality of switches 7a, 7b, 7c such as a combustion start switch and a room temperature setting switch is connected. Further, a vaporizer temperature detecting thermistor 8 as vaporizer temperature detecting means for detecting the temperature of a vaporizer (not shown) constituting the combustor 3 and a room temperature detecting thermistor 9 as room temperature detecting means for detecting room temperature are provided. , Each connected to the input port of the microcomputer 2. On the other hand, the output port side of the microcomputer 2 is connected to the above-described combustor 3 including an electromagnetic pump that sucks oil and sends it to the vaporizer, a heater that heats the vaporizer to a combustion temperature, and the like.

Next, the functional configuration of the combustion control device in this embodiment will be described with reference to FIG. In the figure,
Reference numeral 11 is a detection means for detecting room temperature, vaporizer temperature, combustion state, etc., and corresponds to the vaporizer temperature detecting thermistor 8 and the room temperature detecting thermistor 9 in FIG.
On the other hand, the microcomputer 2 executes a series of operating operations from the start of combustion to the completion of combustion while controlling the combustor 3 based on each detection signal from the detection means 10 and the operation signal from the operation means 7. When an abnormality is detected by the detection signals of the control means 12 and the detection means 10, the operation stop means 13 stores the abnormal state in the storage unit 4 as abnormality detection data.
And the switches 7a, 7b of the operating means 7 in a specific procedure.
The operation stop releasing means 14 is provided for clearing the abnormality detection data stored in the storage section 4 only when the user operates 7c. The combustion control means 12 monitors the presence / absence of abnormality detection data stored in the storage unit 4, and the operation stop means 13 causes the storage unit 4 to detect the abnormality detection data.
When the abnormality detection data is stored in, the operation is forcibly stopped, and when the abnormality detection data in the storage unit 4 is cleared via the operation stop canceling means 14, the operation stop is released to enable the operation. It is supposed to wait.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. Step S1
In, when a combustion start operation signal is input to the microcomputer 2 via the operation means 7, the combustion control means 12 determines whether or not there is abnormality detection data stored in the storage unit 4.
It is determined whether the operation is stopped (step S2). If the abnormality detection data is not stored in the storage unit 4 in this step S2, the combustion control means 12 determines that the operation is not stopped, and a series of combustion control from the combustion start to the combustion completion in the next step S3 is performed. To do. The operation stopping means 13 of the microcomputer 2 detects various abnormalities such as whether the temperature of the carburetor is abnormally increased in step S4 based on each detection signal from the detecting means 11,
Unless an abnormal state is detected, the combustion control of step S3 is continuously performed.

On the other hand, in step S4, when the operation stopping means 13 detects an abnormality that causes the device to be dangerous, the operation proceeds to step S5, and the operation stopping means 13 writes the abnormality detection data in the storage section 4. As a result, the combustion control means 12 immediately stops the combustion control up to that point. After that, in step S6, unless a predetermined releasing operation is performed, the procedure returns to step S1 with the operation stopped state. here,
Even if a combustion start operation signal is input by the operation means 7, it is determined in step S2 that the operation is in an operation stop state, combustion control cannot be started, and the operation shifts to step S5.

In step S4, once the operation stopping means 13 detects an abnormality that requires stopping the operation, even if the commercial power supply 1 is cut off for some reason,
The abnormality detection data stored in the storage unit 4 by the backup power supply 5 is retained as it is. Therefore, regardless of whether or not the commercial power source 1 supplies power, the above step S6 is performed.
Unless the switches 7a, 7b, 7c are operated according to the specific procedure in (3), the stoppage of the operation is not released and the device cannot be restarted.

On the other hand, for example, two switches 7
Turn on the commercial power supply 1 while simultaneously pressing a and 7b,
Alternatively, each switch 7a, 7a
When the switches 7a, 7b, 7c of the operating means 7 are operated in a specific procedure such as pressing b, 7c, the operation stop releasing means 14 clears the abnormality detection data stored in the storage unit 4 and The operation stop state up to (step S
7). After that, when the procedure returns to step S1 and combustion is started, it is determined in the next step S2 that the operation is not stopped, and the combustion control means 12 performs the combustion control in step S3.

As described above, in the above embodiment, when the operation stopping means 13 detects any abnormality and stops the operation, even if the power supply from the commercial power supply 1 is cut off, the backup power supply 5 is used. Since the abnormality detection data stored in the storage unit 4 is retained as it is, the microcomputer 2 is not reset and the abnormality detection data in the storage unit 4 is not cleared when the commercial power supply 1 is turned on again. The stopped state can be continued. Therefore, when the device falls into a dangerous state, it is possible to prevent the user from easily restarting.

On the other hand, when the manufacturer repairs the broken device, if the backup power source 5 as described above is provided, the commercial power source 1 is cut off so that the operation stop state can be easily released. There is a problem of disappearing.
However, the combustion control device of the present embodiment clears the abnormality detection data stored in the storage unit 4 by the operation stop canceling unit 14 only by operating the switches 7a, 7b, 7c of the operating unit 7 in a specific procedure. Then, since the operation stop state can be released, this makes it possible to easily perform a reproduction test of a failure operation due to re-operation without disassembling the apparatus body.

That is, the detection signal from the detection means 11 for detecting the room temperature and the carburetor temperature and the plurality of switches 7 are provided.
Based on the operation signal from the operating means 7 including a, 7b, and 7c, a series of combustion control is performed by the microcomputer 2 including the storage unit 4, and when an abnormality is detected by the detection signal of the detecting means 11, this abnormality is detected. In the combustion control device including the operation stopping means 13 that stores the state in the storage unit 4 and stops the operation, a backup power supply 5 that holds the stored contents of the storage unit 4 when the commercial power supply 1 is not conducted, and a specific procedure. An abnormality is detected by including the operation stop canceling means 14 that clears the abnormality detection data stored in the storage unit 4 and releases the operation stop when the switches 7a, 7b, 7c of the operating means 7 are operated with. When the operation is stopped due to this, it is possible to prevent the operation from being easily restarted and to improve the repairability of the device.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

[0018]

The combustion control device according to the first aspect of the present invention is based on the detection signal from the detection means for detecting the room temperature and the carburetor temperature, and the operation signal from the operation means provided with a plurality of switches. A microcomputer provided with a storage unit performs a series of combustion controls, and when an abnormality is detected by the detection signal of the detection unit, the combustion control is provided with an operation stopping unit that stores the abnormal state in the storage unit and stops the operation. In the device, a power supply backup unit that holds the stored contents of the storage unit when the main power supply is not conducted, and clears the abnormality detection data stored in the storage unit when the switch of the operation unit is operated in a specific procedure. It is equipped with a means for canceling the operation stop to release the operation stop, so that if the operation is stopped after detecting an abnormality, the operation cannot be restarted easily. Rutotomoni, it is possible to increase the repair of the device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a functional configuration of the same as above.

FIG. 3 is a flowchart showing a control operation of the same.

[Explanation of symbols]

 1 Commercial Power Supply (Main Power Supply) 2 Microcomputer 4 Storage Unit 5 Backup Power Supply (Power Supply Backup Means) 7 Operating Means 7a, 7b, 7c Switch 11 Detecting Means 13 Operation Stopping Means 14 Operation Stopping Release Means

Claims (1)

[Claims] 1. A series of combustions by a microcomputer equipped with a storage unit based on a detection signal from a detection means for detecting room temperature and a carburetor temperature and an operation signal from an operation means having a plurality of switches. In a combustion control device equipped with an operation stopping means for controlling and stopping an operation by storing an abnormal state in the storage section when an abnormality is detected by a detection signal of the detecting means, the storage is performed when the main power supply is not conducted. Power supply backup means for holding the stored contents of the unit, and operation stop release means for clearing the operation stop by clearing the abnormality detection data stored in the storage section when the switch of the operation means is operated in a specific procedure. A combustion control device comprising: