JPH0310854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device that activates a self-diagnosis function programmed in a microcomputer or the like in a control circuit that controls the operation of a heater.

In a heating machine that uses a microcomputer to perform complex control, when the signal from a certain sensor goes out of the normal range and the operation stops, the identification signal corresponding to that sensor is memorized, and it can be used for repairs etc. It is equipped with a self-diagnosis function that outputs a display corresponding to an identification signal when the inspector performs an operation to recall the memory contents.

The activation signal input device for activating this type of self-diagnosis function is one in which two dedicated metal pins are placed close to each other on a printed circuit board on which a microcomputer is placed, and the pins are shot between them. Alternatively, a simple switch mounted on a board is generally used. However, since the board is covered with an outer shell, it is necessary to remove part of the outer shell when performing operations, which not only makes it difficult to operate, but also causes other parts on the board to be accidentally shot. , parts were damaged or dangerous. It is also conceivable to make a hole in a part of the outer shell and operate the switch on the board from outside the machine, but this is not practical as there is a risk of damaging other parts. Furthermore, if the switch is mounted on an exterior or an operation panel, an unfamiliar display will be output if it is operated by mistake, giving rise to anxiety or misunderstanding that there is a malfunction.

The present invention has been made against the background of these circumstances, and provides a device that can quickly activate a self-diagnosis function without damaging parts after an abnormality occurs and the heating machine stops operating. There is a particular thing.

In order to achieve this purpose, the self-diagnosis calling device for a heater of the present invention outputs a normal signal when the signals from various sensors that monitor the operating status are within the normal range, and outputs an abnormal signal when the signals are not within the normal range. An abnormality detection device that outputs an identification signal corresponding to the sensor, an alarm generating device that generates an alarm and stops operation when the identification signal is output, and an operation panel equipped with multiple display elements. An actuation signal input device that doubles as an existing switch, a discrimination device that outputs a display command signal when a predetermined special operation is performed on the actuation signal input device while the alarm generating device is activated and the operation is stopped, and a display. The self-diagnosis device outputs a display pattern corresponding to the identification signal to the operation panel when a command signal is input.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an operation panel consisting of a display section 2 and an operation section 3. As shown in FIG. The display section 2 has a power lamp 2.
Display elements such as a, a timer lamp 2b, a refueling lamp 2c, a ventilation lamp 2d, and a number of light emitting diodes 2e for displaying the room temperature are provided. On the other hand, the operation unit 3 includes a power switch 3a, a firepower adjustment knob 3b, a timer function time setting knob 3c, a timer function activation switch 3d, etc. Further, the activation switch 3d is here used to activate a self-diagnosis function. Operation signal input device 3
It also serves as e.

4 is a combustion section consisting of a burner 5, a combustion chamber 6, etc.
Various sensors, typified by an incomplete combustion detection sensor 7 and a high temperature detection sensor 8, are arranged at appropriate locations to monitor the operating state.

Reference numeral 9 denotes a control circuit for controlling the operation of the heating machine, and inside the control circuit, a normal signal is output depending on whether the signals from the sensors 7, 8, etc. described above are within the normal range.
An abnormality detection device 10 that outputs an identification signal, an alarm generation device 11 that issues an alarm and stops operation when the identification signal is output, and an operation signal input device 3e that For example, a discrimination device 12 outputs a display command signal when a special operation such as being pressed five times within a certain period of time is executed, and a display pattern corresponding to the identification signal is displayed on the operation panel 1 when the display command signal is input. A self-diagnosis device 13 and the like that outputs an output are configured.

In the configuration described above, when the operation switch 3a is pressed, the power lamp 2a lights up, and then the burner 5
is ignited and burned to start heating, and the thermal power is adjusted by turning the thermal power adjustment knob 3b. Also,
When starting operation using the timer function,
After setting the time until the start of combustion with the time setting knob 3c, press the power switch 3a, that is, temporarily put it into operation, and then press the operating switch 3d to light the timer lamp 2b. In this way, operation is automatically started after the set time has elapsed. During operation, the abnormality detection device 10 outputs a normal signal to continue operation.

During the above-described operation, if the signal from the incomplete combustion detection sensor 7 deviates from a predetermined normal range due to, for example, poor insulation, the following operation is executed. That is, since the identification signal corresponding to the incomplete combustion detection sensor 7 is output from the abnormality detection device 10, the identification signal is stored in the control circuit 9 at the same time as the alarm generation device 11 is activated and the operation is stopped.

After this, when the above-mentioned special operation is performed on the operation signal input device 3e, the discrimination device 12 is activated, and a display command signal is input to the self-diagnosis device 13. Read the stored identification signal and
A display pattern that is clearly different from the normal display is output to the display unit 2, as shown in FIG. Therefore, the inspector can easily identify the cause of the stoppage of operation by looking at the display pattern, and can promptly take appropriate measures to restart the operation.

In the above-mentioned embodiment, the operation signal input device 3e is not limited to being used as the operation switch 3d, but any switch can be used as long as it does not change the state of the heater even if operated when the operation is stopped. But it doesn't matter. Furthermore, since the self-diagnosis function is intended to provide inspectors with useful information for repairs, etc., the special operation to activate the function should be complicated to the extent that it cannot be predicted from normal driving operations. , changes may be made as appropriate.

As described above, according to the present invention, the activation signal input device for activating the self-diagnosis function doubles as an existing switch provided on the operation panel of the heater, so a switch or the like is provided on the board. It has extremely great practical effects, such as being safe, eliminating the risk of damaging parts, and being easy to operate to activate the self-diagnosis function.

[Brief explanation of the drawing]

FIG. 1 is a system diagram relating to the self-diagnosis calling device of the present invention, and FIGS. 2a and 2b are diagrams showing examples of display patterns. 3e... Operating signal input device, 10... Abnormality detection device, 11... Alarm generating device, 12... Discrimination device, 13... Self-diagnosis device.

Claims (1)

[Claims] 1. An abnormality detection device that outputs a normal signal when the symbols from various sensors that monitor the operating state are within the normal range, and outputs an identification signal corresponding to the abnormal sensor when the symbols are not within the normal range. an alarm generating device that generates an alarm and stops operation when the identification signal is output; an actuation signal input device that doubles as an existing switch installed on an operation panel having a plurality of display elements; A discriminator that outputs a display command signal when a predetermined special operation is performed on the activation signal input device while the alarm generating device is activated and the operation is stopped; and a discriminator that outputs a display command signal when the display command signal is input. A heating machine self-diagnosis calling device comprising: a self-diagnosis device that outputs a display pattern to the operation panel;