JPH01147220A - Safety device for stove - Google Patents

Abstract

PURPOSE:To obtain a safety device for preventing a fire and a burn by providing control means for condensing light radiated from a combustion part and outputting a signal to at least either one of alarming means on fire extinguishing means of the combustion part by variation in the condensed light. CONSTITUTION:Light at a combustion part 9, condensed by condensing means 1 passes through light transfer means 2 and is radiated from radiating means 3. Light receiving means 4 protected by an interrupting plate 5 so that light from the combustion part cannot be obtained, always receives light from light radiating means 3 opposing the light receiving means 4. When an optical path of light receiving means 4a-4d from the light radiation means 3 is interrupted, it becomes impossible to receive light radiated from the light radiating means 3 and the signal from the light receiving means does not enter control means 8. Therefore, the output of NAND circuit 11 is turned on. When the output of the NAND circuit 11 is turned on for a predetermined period of time, a timer 12 is turned on. When both the outputs of the timer 12 and the NAND circuit 11 are turned on, it is dangerous and hence comparison means 13 outputs a drive signal to alarming means 6 and a fire extinguishing signal to burner fire extinguishing means 7.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is directed to an object or person near the combustion part of a stove.
-7 If a body approaches, an alarm will be issued to prevent fire or burns.
The present invention also relates to a safety device for a stove that extinguishes a fire using a burner extinguishing means.

BACKGROUND OF THE INVENTION A conventional safety device for a stove is shown in FIG. Moreover, its side view is shown in FIG. (For example, JP-A-67-'62
329 Publication) In FIGS. 6 to 6, 10 is the stove body, 9 is a combustion tube, and 15 is a guard. Accidents such as fire are prevented by making the guard 16 project forward. For example, the protruding dimension of the guard 16 is set so that it will not burn or catch fire even if a flammable substance approaches.

Problems to be Solved by the Invention However, with the above configuration, if a flammable object approaches the combustion part from between the guards, or if a person who has difficulty in moving quickly, such as a child or the elderly, approaches the stove. If this occurs, it is not possible to detect this and notify the danger and prevent fires and burns. Therefore, there was a problem in that it was dangerous to use the stove in a room only occupied by children and the elderly.

The present invention solves these conventional problems and aims to provide a safety device that prevents disasters and burns.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a condensing means for condensing light emitted from a combustion part in a radiation type stove, and a condensing means for condensing light emitted from a combustion part in a radiation type stove; a light transmitting means for transmitting light; at least one light emitting means for emitting light connected to an end of the light transmitting means in the stove front guard; and at least one light emitting means for receiving light emitted from the light emitting means. One light receiving means, a shielding means for preventing light from the combustion section from directly entering the light receiving means, an alarm means for issuing an alarm, a fire extinguishing means for the combustion section, and a signal from the light receiving means are inputted. The apparatus further includes a control means for outputting a signal to at least one of the warning means and the extinguishing means of the combustion section according to a change in the signal.

Effect of the present invention With the above-described configuration, the light from the combustion section is usually collected by the condensing means, and the light is emitted from the light emitting means via the light transmission means. The light emitted from the light emitting means is received by the facing light receiving means.

If an object or a human body approaches the stove in such a way as to block the optical path from the light emitting means to the light receiving means, the light emitted from the light emitting means cannot be received by the light receiving means. The control means detects this and at least issues an alarm or extinguishes the fire using the extinguishing means in the combustion section, thereby preventing fires and burns.

Embodiment FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1 is a condensing means for condensing the light from the combustion section 9, and is provided on the side of the reflector 10a of the stove body 10. 2 is for transmitting the light condensed by the condensing means 1. A light transmitting means 3 is connected to the terminal end of the light transmitting means 2 in the front guard part of the stove body 10, and at least one charging arm for emitting light is connected to the front opening of the stove body 10. It is provided on the left vertical side of 10b. Reference numeral 4 denotes at least one light receiving means for receiving the light emitted from the light emitting means 3, and is provided on the right vertical side of the front opening 10b. 5 is the light receiving means 4
A shielding plate is a shielding means for preventing the light from the combustion section from entering directly, 6 is an alarm means, 7 is a means for extinguishing the burner in the combustion section, and 8 is a means for inputting the signal of the light receiving means 4 and detecting a change in the signal. It is a control means that drives the alarm means 6 and further outputs a signal to the extinguishing means 7 of the burner. 1° is the stove body.

FIG. 2 is a top view showing one embodiment of the present invention.

FIG. 3 is a block diagram of the main parts of the control means 8.

When a plurality of the light receiving means 4 are used, they are expressed as 4a, 4b, 4C, and 4d using suffixes a to d.

11 is a NAND circuit that takes the AND of the signals from the light receiving means 4a to 4d; 12 is a timer that outputs an ON signal when the output of the NAND circuit 11 exceeds a certain time; and 13, the output of the NAND circuit 11 is 6. - a comparison circuit that outputs a drive signal to the alarm means 6 and an extinguishing signal to the burner extinguishing means 7 only when the output of the timer 12 is ON; 14 is the output of the comparing means 13; This is a reset switch to turn off.

FIG. 4 shows the timing of the control means 8.

a to d are signals of the light receiving means 4a to 4d, respectively, X is an output signal of the NAND circuit 11, and y is a signal of the comparing means 1.
3 is the output signal of the reset switch 14, and 2 is the output signal of the reset switch 14.

Next, the operation of the configuration of the present invention will be explained.

Normally, the light from the combustion section 9 focused by the light focusing means 1 passes through the light transmitting means 2 and is emitted from the light emitting means 3. The light receiving means 4, which is protected by a shielding plate 5 so as not to receive light from the combustion section, always receives light from the opposing light emitting means. (When a plurality of light receiving means (for example, 4) are installed, each is expressed as 4a, 4b, 4c, and 4d using subscripts.) Examples of signals from the light receiving means are shown in FIGS. 4a to 4d.

If the light emitting means 3 to the light receiving means (4a to 4d) 7.
If an object or a human body approaches the stove so as to block the optical path of \-, the light emitted from the light emitting means 3 cannot be received by the light receiving means (4a to 4d). In which case
In the control means 8, the signal of the light receiving means becomes difficult to enter.N
The output of the AND circuit 11 is turned ON. (Figure 4 x) NA
When the output of the ND circuit 11 is ON for a certain period of time or longer (in this case, this indicates that the object or human body is approaching a stop for a certain period of time or more), the timer 12 is turned ON.

If the output of the timer 12 and the output of the NAND circuit 11 are both ON, it is dangerous, so the comparison means 13 outputs a drive signal to the alarm means 6 and outputs an extinguishing signal to the extinguishing means 7 of the burner. (ON signal in Fig. 4 y) The burner extinguishing means 7 extinguishes the fire in response to this extinguishing signal. Comparison means 13
The output becomes O by turning on the reset switch 14.
Return to FF. (Fig. 4 y, z) Therefore, in a radiation type stove, if an object or a human body approaches from the front guard towards the combustion part in such a way as to block the optical path from the light emitting means 3 to the light receiving means 4, an alarm will be issued. Safe heating can be achieved by issuing an alarm using means 6 and stopping combustion using the burner extinguishing means.

Effects of the Invention As described above, according to the stove safety device of the present invention, when combustible materials approach the combustion part (for example, when laundry is blown by the wind and approaches the stove, or when paper or other items are removed from a shelf) Since it detects this (such as when something falls down) and issues an alarm, it can be used with peace of mind even if there are people nearby. Furthermore, since the fire can be extinguished by the fire extinguishing means in the combustion part, there is no fear of fire.

However, since the combustion light from the combustion section is used as the detection light, power consumption is reduced and long-term use is possible. Furthermore, abnormal combustion and misfire can also be detected by changing the combustion light brightness. Therefore, it is possible to provide safe and comfortable heating even when the device is used by children or elderly people who have difficulty in moving quickly.

[Brief explanation of the drawing]

91＼. FIG. 1 is a perspective view of a safety device for a stove showing an embodiment of the present invention. FIG. 2 is a top view of the safety device of the stove. FIG. 3 is a block diagram of the main parts of the control means. FIG. 4 a-z shows the timing r in the control means. FIGS. 5 and 6 are a perspective view and a side view showing the concept of a conventional stove safety device. 1... Light collecting means, 2... Light transmission means, 3...
...Light emitting means, 4... Light receiving means, 5...
...Shielding plate, 6... Alarm means, End... Fire extinguishing means, 8... Control means. Name of agent: Patent attorney Satoshi Nakao and one other name
Part 1
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, ノ + (he) 9 dimensions Figure 5 Figure 6 I/1 2 ・＼-7 Procedural amendment work illusion March 2, 1988 Patent application No. 305023 2 Name of the invention Stove safety Relationship with device 3 amendment person case Patent application Address 1006 Kadoma, Kadoma City, Osaka Name Name
(582) Matsushita Electric Industrial Co., Ltd. Representative Tani
Akio I 4 Agent 571 Address 7, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Contents of amendment (1) “Figure 4 a” on page 9, lines 4 to 6 of the specification ~2 is ~figure.'' is corrected as follows. "Figure 4 is a timing diagram within the control means." (2
) Correct the drawing No. 4 as shown in the attached sheet.

Claims (1)

[Claims] A radiation type stove includes a condensing means for condensing light emitted from a combustion part, a light transmission means for transmitting the light condensed by the condensing means, and a termination of the light transmission means at a front guard part of the stove. at least one light emitting means for emitting light connected to the light emitting means, at least one light receiving means for receiving the light emitted from the light emitting means, and at least one light receiving means for preventing light from the combustion section from directly entering the light receiving means a shielding means for emitting an alarm, an alarm means for emitting an alarm, and an extinguishing means for the combustion section;
A safety device for a stove comprising a control means for inputting a signal from the light receiving means and outputting a signal to at least one of the alarm means or the extinguishing means based on a change in the signal.