JPH01312327A - Combustion safety device - Google Patents

Abstract

PURPOSE:To prevent a stoppage of equipment from being performed under an erroneous detection of trouble by an outer disturbance or bug of program by a method wherein a past trouble mode is stored and operation of the equipment is stopped only when a plurality of times of the same trouble modes are continuously generated. CONSTITUTION:During operation of equipment, as a trouble sensor 1 is operated, for example, the operation is temporarily stopped and then a trouble mode discriminated by a trouble mode discriminating means 5 is stored in a memory means 6, whether the present generated trouble mode is the same as the previous trouble mode is compared with a stored content of the memory means 6, discriminated with it. If the mode is a trouble mode differing from that of the previous one in case of erronous detection of trouble caused by an outer disturbance such as noise and the like, the discrimination of trouble is automatically released and a system is returned back to the operation. In case that a trouble is truly generated and it is discriminated that the trouble is the same trouble mode as that of previous one, the operation is completely stopped. With the foregoing operation, it is possible to prevent the erroneous operation and at the same time if a trouble is rearly generated, the operation can be safely and positively stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion safety device for combustion appliances.

BACKGROUND OF THE INVENTION In conventional combustion safety devices, when a failure is detected based on signals from various failure detectors, the operation of the equipment is stopped regardless of the failure mode or the number of occurrences.

Problems to be Solved by the Invention In recent years, combustion safety devices for combustion appliances have become increasingly complex and sophisticated, and most of them are based on microcomputers. Under these circumstances, with a conventional configuration, equipment would stop due to external disturbances such as noise or incorrect detection of a failure due to a bug in the program, resulting in equipment malfunctioning and stopping. there were.

In order to solve the above-mentioned problems, the present invention does not completely stop the equipment by detecting a failure once, but detects the failure after determining that a failure has definitely occurred based on the failure mode and the number of occurrences. This provides a combustion safety device that completely and safely stops the operation of a combustion engine.

Means for Solving the Problems In order to solve the above problems, the combustion safety device of the present invention includes:
It is equipped with a failure mode determination means for determining which failure detector has activated and a storage means for storing past failure modes, and stops the operation of the equipment only when the same failure mode occurs multiple times in succession. It is the composition.

Effects The present invention, with the above-described configuration, can prevent malfunctions in which the operation of equipment is stopped due to disturbances such as noise or erroneous detection of failure due to bugs in the program.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a combustion safety device in an embodiment of the present invention, and 1, 2, 3.4 are various failure detectors,
The signal is transmitted to the failure mode determination means 5, and the means 6 stores the failure mode, and includes an operation stop means 7 for stopping the operation when the same failure mode occurs a plurality of times in succession. Reference numeral 8 denotes a control device comprising a failure mode determination means 5, a storage means 6, and an operation stop means 7.

The operation of the combustion safety device configured as described above will be described below with reference to the flowcharts of FIGS. 1 and 2.

If the failure detector 1 is activated while the equipment is in operation, steps 8 and 8 are activated.
A failure is detected at step 9, and the operation is temporarily stopped at step 9. At step 10, the failure mode determined by the failure mode determination means 5 is stored in the storage means 6. After that, in step 11, it is determined whether the failure mode that has occurred this time is the same as the previous failure mode by comparing it with the memory stored in the storage means 6. In step 12, the failure determination is automatically canceled and the operation is returned to step 13. On the other hand, if it is determined in step 11 that a failure has indeed occurred and the failure mode is the same as the previous time, in step 14 the operation is completely stopped.

As described above, according to this embodiment, by determining whether the same failure mode has occurred twice in a row in step 11, it is possible to prevent equipment from being stopped due to erroneous detection of failure due to disturbance, etc. Not only can malfunctions be prevented, but when a failure actually occurs, the operation of the equipment can be safely and reliably stopped.

Effects of the Invention As described above, the present invention stores past failure modes and stops equipment operation only when the same failure mode occurs multiple times in a row, thereby preventing disturbances or program bugs. It is possible to prevent equipment stoppage from malfunctioning due to erroneous failure detection, and to safely and reliably stop equipment operation if a failure actually occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart thereof. 1 to 4...Failure detector, 5...Failure mode determination means, 6...Storage means Name of agent Patent attorney Toshio Nakao and 1 other person 1st
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Claims (1)

[Claims] The device includes various types of failure detectors that detect failures in equipment, and a control device that receives signals from the failure detectors and controls the operation of the equipment, and determines which failure detector in the control device is activated. A combustion safety device comprising: a failure mode determination means for determining past failure modes; a storage means for storing past failure modes; and an operation stop means for stopping operation of equipment only when the same failure mode occurs multiple times in succession.