JPS60152819A - Burning apparatus with safety mechanism - Google Patents

Abstract

PURPOSE:To contrive to enable the automatic re-ignition only when the unexpected extinguishment is confirmed merely as a temporary occasion by a method wherein the re-ignition is made automatically only when the definite conditions is satisfied after safety control operation. CONSTITUTION:A burner 1 is ignited and starting operation thereof is performed by a timer for checking a burning continuous time. In case that an extinguishment switch button 6 is not made ON operation, when the burner 1 is extinguished by the automatic closing of a safety shut-off valve Vs caused by some reason, a time T from igniting to extinguishment is measured by the timer, then the time T is judged by comparing with the preset time T0. In case of T>=T0, the extinguishment is judged to be caused by a temporary reason, then the timer is reset and re-ignited. In case of T<T0, the extinguishment is judged to be real extinguishment, then an alarm buzzer 8 is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable when it is detected that the combustion flame of a burner (pilot burner or main burner) has unexpectedly extinguished due to wind influence, lack of oxygen, or other causes. The present invention relates to a combustion appliance with a safety mechanism, which is configured to automatically close a safety shutoff valve installed in a fuel supply path to the burner.

Conventionally, such combustion appliances with safety mechanisms place too much emphasis on safety in the event of an unexpected fire extinguishment. is working, or in instantaneous water heaters etc.
Of course, when the water supply is stopped for some reason, or when there is an essential fire extinguishment due to lack of oxygen or other malfunctions, the fire may be temporarily blown out by wind, temporary gas pressure, etc. Even in the case of non-essential temporary fire extinguishing, such as extinguishing by voltage, water pressure (in the case of instantaneous water heaters, etc.), etc.
Because the safety shutoff valve was configured to remain closed, the employer inspected and determined whether the accidental fire was temporary or substantial. However, if it turns out that the fire is only temporarily extinguished, it is necessary to manually reignite the fire, which is extremely troublesome.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a completely new and convenient combustion appliance with a safety mechanism that automatically re-ignites the fire when the unexpected extinguishment is only temporary. The goal is to provide the following.

Hereinafter, first, embodiments of the present invention will be described based on the drawings.

Figure 1 shows a schematic diagram of the overall configuration of the stove burner. is a fuel gas supply path to the burner, (g) is an electromagnetic flow control valve, (Vs) is an electromagnetic safety shutoff valve, and re) is an automatic control device.

The automatic control device (C) has an ignition switch button (5
), fire extinguishing switch button (6), multi-stage fire power adjustment switch button (7), and notification buzzer (8).
) and a switch button (7) for adjusting the firepower.
Control that adjusts the flow-it control valve (V) to the corresponding opening when the button (7) is pressed (ON) is operated, and the ignition switch button (5) is pressed (ON).
) When operated, the safety shutoff valve (V8) is opened and the spark igniter (2) is operated for a certain period of time to ignite and burn the burner (1). ) safety control that automatically closes the safety shutoff valve (Va) when the flame rod (3) detects that the combustion of the (More on this later)
control that automatically relights the fire only when the conditions are met, and when the fire extinguishing switch button (6) is pressed (ON), the safety quick-off valve (Vs) is closed and the burner ( It is configured to perform control such as 1) to stop combustion.

The automatic reignition control is the most characteristic part of the present invention, and is performed as follows.

That is, basically, even if the combustion flame of the burner (1) is unexpectedly extinguished and automatic safety control is performed, if the extinguishment is only temporary, the burner ( 1) is designed to automatically re-ignite.

Next, a specific control algorithm of the automatic control device (C) will be explained using the flowchart of FIG. 2 and the time chart of FIG. 8.

Ignition switch button (5) l When turned OH, it resets the timer for checking the combustion duration, opens the safety shutoff valve (V8), and activates the igniter (2) for a few seconds to turn on the burner (1). ignite, and also start the timer. Then frame rod (3)
Continue to monitor whether the burner (1) continues to burn. When the safety shutoff valve (v8) is automatically closed for some reason and the burner (1) is extinguished even though the fire extinguishing switch button (6) has not been turned on, the It is determined whether the time (T) from the time of ignition to the time of extinguishing the fire has reached a preset time (To) (for example, 5 minutes), and if T≧TO, it is determined that it is long enough until then. After stable combustion for a period of time, it is determined that the extinguishment is due to some temporary cause, and the timer is reset and ignited again. It determines that this is an essential fire extinguishment that will not recover naturally within a certain period of time, and activates the alarm buzzer (8).Also, when the fire extinguishing switch button (6) is turned on, the safety shutoff valve (
Vs) to extinguish the burner (1). In addition,
Control of the flow rate control valve (V) corresponding to the operation of the firepower control switch button (7) is performed by another control section (not shown).

In addition, in the above embodiment, by determining whether the combustion duration (T) from the time of ignition to the time of unexpected extinguishment is equal to or longer than a certain time (TO), it is determined that the unexpected extinguishment is temporary. Although the method shown above is configured to automatically re-ignite only when it is determined to be temporary, the method is not limited to such a method, for example, While the configuration is configured to automatically restart the fire after an unexpected fire extinguishment, if the automatic restart is repeated more than a predetermined number of times within a certain period of time, it is determined that the fire is essentially extinguished, and the automatic restart is performed. It may be configured to prohibit.

However, the automatic control device f(C) may be configured with a hard logic circuit or may have a soft logic configuration using a microcomputer.

In summary, the combustion appliance with a safety mechanism according to the present invention has the following features:
A combustion appliance with a safety mechanism, which is configured to automatically close a safety shutoff valve installed in a fuel supply path when unexpected extinguishment of a combustion flame is detected, a means of determining whether it is temporary or essential;
The present invention is characterized in that it includes a control device having means for automatically re-igniting the fire when the determination means determines that the unexpected extinguishment is temporary.

The functions and effects achieved by the above characteristic configuration are as follows.

In other words, even if the burner combustion flame is unexpectedly extinguished for some reason and the safety shutoff valve is automatically closed, if the unexpected extinguishment is only due to a temporary cause with no continuity. Since the re-ignition is automatically controlled, the user does not need to investigate the cause of the fire extinguishment in such a case, nor do they need to manually re-ignite, making it extremely convenient and practical. I was able to make it into something 0

[Brief explanation of the drawing]

The drawings show an embodiment of the combustion appliance with a safety mechanism according to the present invention, in which FIG. 1 is a general schematic diagram, FIG. 2 is a control flowchart, and FIG. 3 is a time chart for explaining the operation. (Burner, (4) Fuel supply path, (C) Automatic control device. Agent: Patent attorney Osamu Kitamura) Figure 3 Figure 3 (QE Scoot) Figure 2

Claims (2)

[Claims] (1) A combustion appliance with a safety mechanism, which is configured to automatically close a safety shutoff valve (G) installed in the fuel supply path (4) when unexpected extinguishment of a combustion flame is detected. , means for determining whether the unexpected extinguishment of the combustion flame is temporary or essential; and automatically when the determining means determines that the unexpected extinguishment is temporary. A combustion appliance with a safety mechanism, characterized in that it is equipped with a control device (C) having means for reigniting the ignition, (2) The determination means is configured to determine that the unexpected extinguishment is temporary when the combustion duration from the start of combustion to the unexpected extinguishment is longer than a certain time. A combustion appliance with a safety mechanism according to claim 2, characterized in that: