JP2537892B2 - Alarm device for indoor open combustor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for an indoor open-type combustor that releases combustion gas into a room for heating.

2. Description of the Related Art Conventionally, an alarm device for a combustor is refueled with a display and a buzzer sound.
I was warning about ventilation and filters. The combustion state detection unit detects when the combustion control device is about to fall into a combustion state that requires a warning set in advance or when it falls, and the same is detected through the combustion control unit regardless of the content of the abnormality. It was supposed to give a warning with a buzzer sound.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in this combustor alarm device, the same buzzer sound is used for warning of refueling, ventilation, filters, etc. I couldn't know if it was a warning for the item. Therefore, there is a possibility that the warning of urgent oxygen deficiency of the combustor that releases the combustion gas into the room may be erroneously recognized as another warning, for example, a warning to the extent that caution such as refueling is required.

The present invention solves the above-mentioned conventional drawbacks, and an object of the present invention is to improve the safety by using two or more kinds of warning sounds to characterize a warning in the case of an urgent abnormality such as oxygen deficiency.

Means for Solving the Problems In order to solve the above problems, the present invention determines the content of the abnormality signal from the combustion state detection unit in the abnormality determination unit, the signal from this abnormality determination unit is sudden such as oxygen deficiency. In the case of a required abnormality, a high-frequency alarm sound or a high-sound pressure alarm sound that gives a sense of danger is generated, and a different alarm sound is emitted in the case of a caution abnormality.

Effect The present invention, with the above-described configuration, can effectively and immediately notify the user of an urgent abnormality such as oxygen deficiency, audibly inform the user, and promote ventilation or the like to improve safety.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a combustion state detection unit, which monitors the combustion state. Reference numeral 2 is a combustion control unit, and when the combustion state detection unit 1 detects a combustion abnormality or the like,
It has an abnormality determination unit 2a that determines the details of the abnormality while stopping combustion and the like. Reference numeral 3 is an alarm unit, and a display unit 4 inside the alarm unit 3 allows the combustion state to be visually recognized. Similarly, the warning sound generating unit 5 inside the warning unit 3 prompts a caution or warning with a buzzer sound or the like.

The operation of the above configuration will be described with reference to the flowchart of FIG. First, when the combustion state becomes abnormal, the combustion state detection unit 1 sends an abnormality signal S1 to the combustion control unit 2.
As a result, the presence of an abnormality is detected in step 6, and the abnormality determination unit 2a
Is judged at step 7 whether it is a caution level such as refueling or an emergency such as oxygen deficiency.
Is sent to the alarm sound generation unit 5, and a low-frequency buzzer sound (alarm 1) is generated, and at the same time, the display unit 4 displays which caution item has been issued. On the other hand, if the above abnormality is an urgent abnormality such as oxygen deficiency, the abnormality determination unit 2a determines this in step 7, sends a signal S3 to the alarm sound generation unit 5, and outputs a high-frequency buzzer sound (alarm 2). The combustion is stopped at the same time as the generation, and the display unit 4 displays that the combustion is stopped due to an urgent abnormality such as oxygen deficiency. That is, two types of alarm sounds, one with a high-frequency alarm sound that gives a sense of danger, the other with a low-frequency alarm sound, are used.

3 to 5 show specific circuits for generating an alarm sound. First, the circuit of FIG. 3 will be described. In advance, the microcomputer 9
In order to output two kinds of frequencies with the same sound pressure, a low frequency signal should be output at the time of a caution warning and a high frequency signal should be sent at the time of an emergency such as oxygen deficiency. The piezoelectric buzzer 11 selectively uses a high-frequency alarm sound and a low-frequency alarm sound according to the signal.

Next, the circuit of FIG. 4 will be described. In FIG. 4, the difference from the above-mentioned embodiment is that a low-sound warning sound is used instead of a low-frequency warning sound, and a high sound pressure warning sound is used instead of a high-frequency warning sound. Therefore, even in this configuration, the same operation and effect as described above can be obtained. That is, the microcomputer 12 outputs a signal to the base of the transistor 14 for driving the piezoelectric buzzer 13 as in the above embodiment, and turns on the light emitting diode of the photocoupler 15 only when there is an urgent abnormality such as oxygen deficiency. The signal is output. As a result, an alarm sound is different depending on whether the photocoupler 15 is ON or OFF. A warning sound with a low sound pressure can be obtained during a caution warning, and a warning sound with a high sound pressure can be obtained during an oxygen deficiency.

Also, in the example of FIG. 5, the difference from the above embodiment is ON.
ON / OFF by using a sound with a wide range of OFF / OFF for caution such as refueling
The point is that a sound with a small width is used for warning of an emergency such as oxygen deficiency, and this configuration also has the same operation and effect. This circuit is a modification of the grounded-emitter Hartley oscillator. If the oscillation conditions are satisfied, the oscillation frequency and sound pressure are constant. Two types of signals are set in the microcomputer 16 in advance, one with a small ON / OFF width and one with a large ON / OFF width. In each case, they are used properly when there is an urgent abnormality such as oxygen deficiency and an abnormality of caution.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, the present invention provides the following effects.

(A) When an urgent abnormality such as an oxygen deficiency occurs, it can be known only by an alarm sound, which enables the user to ventilate and prevent an oxygen deficiency accident or the like. , The safety of the indoor open type combustor is remarkably improved.

(B) In the case of abnormalities of caution other than oxygen deficiency, even if the alarm sound is the same, the content of the abnormality is displayed on the display unit, so it is possible to know what abnormality has occurred and take appropriate measures. It will be possible.

(C) Since one display unit performs various displays, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram of an alarm device according to an embodiment of the present invention, FIG. 2 is a flowchart explaining its operation, and FIG.
5 to 5 are circuit diagrams showing specific examples of the alarm circuit. 1 ... Combustion state detection unit, 2 ... Combustion control unit, 2a ... Abnormality determination unit, 4 ... Display unit, 5 ... Alarm generation unit.

Claims (1)

(57) [Claims] 1. A detection unit for detecting a combustion state, a combustion control unit for controlling the combustion state by the detection unit, a display unit for displaying the combustion state and an alarm sound generation unit, the combustion control unit detecting the combustion state. When the signal from this abnormality judgment unit has an abnormality judgment unit that judges whether the content of the abnormality signal is an emergency such as oxygen deficiency or an abnormality of caution level, and the signal from this abnormality judgment unit is an abnormality such as oxygen deficiency that is urgent Is a warning sound with a high frequency or a warning sound with a high sound pressure that makes the warning sound generation section feel a danger.If the warning sound is abnormal, a different warning sound is generated and the content of the abnormality is displayed on the display section. Alarm device for indoor open type combustor.