JPH0561649U - Oil stove automatic fire extinguisher - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an automatic fire extinguishing device for an oil stove that does not consume fuel unnecessarily by extinguishing the combustion device 7 during sleeping at night. [Structure] Illuminance detecting means 9 for detecting the illuminance in a room, illuminance comparing means 12 for comparing the illuminance detected by the illuminance detecting means 9 with a reference illuminance, and switching means for switching the operation or non-operation of the illuminance comparing means 12. 17, and a measuring means for measuring the duration of this small illuminance when the indoor illuminance detected by the illuminance detecting means 9 is smaller than the reference illuminance,
The illuminance detection means 9 is separated from the stove body 1 by comparing the duration output from the measuring means with a predetermined time, and extinguishing means for extinguishing the combustion equipment when the duration exceeds the predetermined time. In addition, an automatic fire extinguisher for an oil stove installed near the irradiation range of indoor lighting installed on the ceiling of the room.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic fire extinguisher for an oil stove that controls combustion based on the illuminance in the room.

[0002]

[Prior Art]

 Conventionally, as an automatic fire extinguisher for an oil stove, an overheat prevention device and an automatic earthquake extinguishing device have been installed on the oil stove.

This overheat prevention device automatically extinguishes a fire when there is a risk that the temperature inside the combustion cylinder that is burning oil will rise abnormally and exceed the heat resistance effect of the oil stove. On the other hand, the anti-seismic fire extinguishing system automatically extinguishes the fire if there is a risk of the oil stove falling due to an earthquake or a strong external shock.

[0004]

[Problems to be solved by the device]

 As described above, the operation of the automatic fire extinguishing system of the oil stove is due to the abnormal combustion inside or the strong impact from the outside.In the situation where the oil stove operates normally, unless the operation switch is turned off, Is not extinguished.

However, even when the oil stove is operating normally, this oil combustion is unnecessary when the user forgets to turn it off and goes to bed at night, or in a room with no people at night. There was a problem that the running cost would be unnecessarily increased if the fire was not extinguished.

In view of the above-mentioned conventional problems, an object of the present invention is to provide an automatic fire extinguishing device for an oil stove that does not consume fuel unnecessarily by extinguishing a combustion device when sleeping at night. ..

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention relates to an automatic fire extinguisher for an oil stove according to the present invention, which compares illuminance detection means for detecting indoor illuminance with illuminance detected by the illuminance detection means with a reference illuminance. Illuminance comparing means, switching means for switching the operation or non-operation of the illuminance comparing means, and measuring means for measuring the duration of this small illuminance when the indoor illuminance detected by the illuminance detecting means is smaller than the reference illuminance. And comparing the duration output from the measuring means with a predetermined time, and extinguishing means for extinguishing the combustion equipment when the duration exceeds the predetermined time, and the illuminance detecting means includes the main body of the stove. It is characterized in that it is installed in the vicinity of the irradiation range of the indoor lighting installed on the ceiling in the room.

[0008]

[Action]

 According to the present invention, the illuminance comparison means is operated by the switching means, and the fire extinguishing means is activated when the dark state in the room continues for a predetermined time.

On the other hand, when the illuminance comparing means is in the non-operating state, the fire extinguishing means does not operate and operates in the same manner as a general oil stove.

Further, since the illuminance detecting means is separated from the stove body and is installed near the irradiation range of the indoor lighting installed on the ceiling of the room, the illuminance detecting means is installed in a person who lives in the room. In addition, since the illuminance detecting means is close to the indoor lighting, it is possible to reliably detect the turning on and off of the indoor lighting.

[0011]

【Example】

 1 to 3 show an automatic fire extinguishing system for an oil stove according to the present invention, and FIG. 1 is a schematic view showing an installation state of the oil stove in a room.

FIG. 1 shows a semi-enclosed petroleum stove. Inside the stove body 1, there is a pot burner 2 and a combustion cylinder 3 in which the fuel of the pot burner 2 burns. The flue gas from the combustion tube 3 is installed and is exhausted to the outside through the chimney 4. Oil is supplied to the pot burner 2 by an electromagnetic pump 5, and combustion air is supplied by a combustion blower 6, and the electromagnetic pump 5 and the combustion blower 6 form an oil combustion combustion device 7. It is configured.

In such an oil stove, the feature of the present invention is an automatic fire extinguisher that controls combustion equipment based on indoor illuminance. In the figure, 8 is a control box of an automatic fire extinguisher installed in the stove body 1, in which each component of the device is built. Reference numeral 9 denotes an illuminance detecting means for detecting the illuminance in the room, for example, an optical sensor composed of a CdS optical transmission cell. This optical sensor 9 is installed on the wall A in the room, is separated from the control box 8 of the stove body 1, and is connected to the control box 8 by a lead wire 10. Further, the installation position of the optical sensor 9 is the upper part of the wall A, which is a portion which is not shaded by a person who lives in the room, and the light of the indoor lighting 11 installed on the ceiling B. It is located near the irradiation range. Further, the resistance value of the optical sensor 9 increases when the illuminance in the room decreases, and conversely, the resistance value decreases when the illuminance increases. FIG. 2 is an electric circuit diagram showing the structure of this automatic fire extinguisher. In the figure, 12 is an illuminance comparison means for comparing the illuminance detected by the optical sensor 9 with a preset reference illuminance. The illuminance comparing means 12 connects the optical sensor 9 and the resistor 13 in series and outputs the detection voltage from the midpoint of the connection, and the resistors 14 and 15 are connected in series and the midpoint of the connection. From the detection unit side to the reference unit side, and the comparator 16 compares the voltages from the detection unit side and the reference unit side to determine whether the indoor illuminance is smaller than the reference illuminance. When the indoor illuminance is higher than the reference illuminance, a low level signal is output, and conversely, when the indoor illuminance is lower than the reference illuminance, a high level signal is output.

Reference numeral 17 is a switching means for switching the illuminance comparing means 12 between operating and non-operating. The switching means 17 has a resistance 18 and a resistance 19 inserted between the optical sensor 9 and the resistance 13 of the illuminance comparison means 12 and between the resistance 13 and the ground, respectively. The resistors 18 and 19 are connected so as to bypass them, and changeover switches 20 and 21 interlocking with each other are inserted in the bypass parts. That is, when the switching switches 20 and 21 are closed, the voltage corresponding to the indoor detected illuminance is output to the comparator 16 without being affected by the resistors 18 and 19. On the contrary, when the switches 20 and 21 are open, both the resistors 18 and 19 have an effect, and even if the indoor illuminance changes, the resistors 18 and 19 are controlled so that the voltage becomes lower than a predetermined voltage (a voltage lower than the reference voltage). (19 is set) is output, and the function of the illuminance comparison means 12 is not exerted.

Reference numeral 22 is a CPU having a micro computer configuration with a built-in timer, which operates a combustion device drive circuit 24 and a notification device drive circuit 25 on the basis of an output signal from the comparator 16 and a signal from the operation switch 23 to perform combustion. The device 7 and the notification device 26 installed in the stove body 1 of FIG. 1 are driven and controlled.

FIG. 3 is a flow chart showing drive control of the combustion device 7 and the notification device 26 by the CPU 22. That is, when the changeover switches 20 and 21 are turned on and the operation switch 23 is turned on, the combustion device 7 burns to heat the room (S1, S2).

Here, when the room is bright, that is, when the lighting is turned on even during the daytime or at night, the illuminance in the room is higher than the reference illuminance, and the signal output from the illuminance comparison means 12 becomes a low level. Therefore, the combustion operation is continued (S3). To extinguish the oil stove, the operation switch 23 may be turned off (S4).

As described above, when the room is bright, the oil stove normally operates, but at night, the room becomes dark by turning off the light, and accordingly the room illuminance is smaller than the reference illuminance and the illuminance comparison means 12 When the output signal becomes high level, the timer of the CPU 22 starts measuring the dark state time (S5).

During the measurement of this time, it is again determined whether the indoor illuminance is higher than the reference illuminance (S6). This step 6 takes into consideration that the lighting in the room may be turned off and then turned on again. In such a case, the timer is initialized so that it does not time up (S7, S8) and the combustion operation of the oil stove is continued. On the other hand, when the dark state in the room continues for a predetermined time and the time is up, the notification device 26 drives and the automatic fire extinguishing is displayed on the notification device 23 (S9), and the process proceeds to step 4 to burn. The device 7 is extinguished.

When the changeover switches 20 and 21 are turned off and the operation switch 23 is turned on, the resistors 18 and 19 of the changeover means 17 are energized, and the output voltage on the detection side of the illuminance comparison means 12 is set to the reference side. The output voltage is higher than the output voltage, and a low-level signal is constantly output from the comparator 16 to the CPU 22, and the function of the illuminance comparison means 12 is not exerted. Therefore, like the normal oil stove, after the operation switch 23 is turned on, the oil stove is not extinguished unless the switch 23 is turned off.

As described above, according to this embodiment, since the oil stove is extinguished based on the indoor illuminance, it is possible to prevent wasteful consumption of oil due to forgetting to turn off the oil such as when sleeping at night. it can.

Further, this automatic fire extinguishing function is convenient because it can be operated by the switching means 17 or can be appropriately selected not to operate.

Furthermore, since this optical sensor 9 is a portion above the wall A in the room that is not shaded by a person living in the room, it is mistakenly recognized as a person's shadow and the indoor illuminance has decreased. Since it does not cause a malfunction, and because it is located in the vicinity of the illumination range of the indoor illumination 11 installed on the ceiling B, the indoor illuminance detected by the optical sensor 9 is also slightly attenuated. Various controls can be performed.

Although the resistance values on the reference part side of the illuminance comparison means 9 according to the above-described embodiment are fixed, the reference voltage can be changed by using a variable resistor or the like. By changing the reference voltage in this way, it is possible to cope with changes in the illuminance of various miniature electric bulbs, etc. that light up at bedtime, and set so that combustion does not continue even if the illuminance of the miniature electric bulb changes.

[0025]

[Effect of the device]

 As described above, according to the present invention, when the illuminance comparison means is operated by the switching means, and the fire extinguishing means is activated when the indoor dark state continues for a predetermined time, it is possible to sleep at night. No wasted oil is consumed.

Further, when the illuminance comparison means is made inactive by the switching means, the fire extinguishing means does not operate due to the change in illuminance and operates in the same manner as a general oil stove, so this automatic fire extinguishing function can be appropriately selected. , It is easy to use.

Further, since the illuminance detecting means is installed apart from the main body of the stove and is installed near the irradiation range of the indoor lighting installed on the ceiling of the room, the illuminance detecting means is installed in the room. In addition, since the illuminance detecting means is close to the indoor lighting, it is possible to reliably detect lighting and extinguishing of the indoor lighting and prevent malfunction of the automatic fire extinguisher.

[Brief description of drawings]

FIG. 1 is a schematic view showing an installed state of an oil stove according to the present invention.

FIG. 2 is an electric circuit diagram of an automatic fire extinguisher according to the present invention.

FIG. 3 is a flowchart showing drive control of an automatic fire extinguisher.

[Explanation of symbols]

1 ... Stove body, 7 ... Combustion device, 9 ... Photosensor, 11
... indoor lighting, 12 ... illuminance comparing means, 17 ... switching means, 22 ... CPU, B ... ceiling.

Claims (1)

[Scope of utility model registration request] 1. An illuminance detecting means for detecting an illuminance in a room, an illuminance comparing means for comparing the illuminance detected by the illuminance detecting means with a reference illuminance, and a switching means for switching between operation and non-operation of the illuminance comparing means. When the indoor illuminance detected by the illuminance detecting means is smaller than the reference illuminance, a measuring means for measuring the duration of this small illuminance, and comparing the duration output by the measuring means with a predetermined time, A fire extinguishing means for extinguishing the combustion device when the duration exceeds a predetermined time, the illuminance detecting means is separated from the stove body, and the vicinity of the irradiation range of the room illumination installed on the ceiling of the room An automatic fire extinguishing system for oil stoves characterized by being installed in.