JPH0590152U - Oil stove automatic fire extinguisher - Google Patents

Abstract

(57) [Summary] [Purpose] An oil stove that can automatically extinguish combustion equipment during nighttime sleep and does not waste fuel.
Provide an automatic fire extinguishing device for bu. An optical sensor 8 for detecting illuminance in a room, and an illuminance comparison means 9 having different reference illuminances and comparing the illuminance detected by the optical sensor 8 with each reference illuminance.
A measuring unit that has a plurality of setting times set corresponding to the magnitude of the illuminance difference when the indoor illuminance compared by the illuminance comparing unit 9 is smaller than each reference illuminance, and measures the duration of this small illuminance. And the extinguishing means for extinguishing the combustion device 7 when the continuation time measured by the measuring means is compared with each set time and the continuation time exceeds the set time. Therefore, the oil stove can be extinguished automatically at bedtime based on the indoor illuminance, and the time until the extinguishing is set according to the indoor illuminance, so the extinguishing time corresponds to the actual living conditions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, as an oil fire stove automatic fire extinguishing device, one in which an overheat prevention device or an earthquake automatic fire extinguishing device is attached to the oil stove is known.

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 resistant structure of the oil stove. On the other hand, the anti-earthquake automatic 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 extinguisher for an oil stove that reliably extinguishes combustion equipment during nighttime sleep and the like and does not consume unnecessary fuel. is there.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides an automatic fire extinguishing system for an oil stove according to the present invention, which has illuminance detecting means for detecting indoor illuminance and different reference illuminances. The illuminance comparison means for comparing the illuminance detected by the illuminance with each of the reference illuminances and the illuminance difference when the indoor illuminance compared by the illuminance comparison means is smaller than each reference illuminance is set. In addition to having a plurality of set times, the measuring means for measuring the duration of this small illuminance is compared with the duration measured by the measuring means and each set time, and this duration is set to this set time. It consists of fire extinguishing means to extinguish the combustion equipment when it exceeds.

According to a second aspect of the present invention, in the automatic fire extinguishing system for an oil stove according to the first aspect, when the illuminance in the room becomes higher than any of the reference illuminances while the duration of the measuring means is being measured. It is characterized by having an initialization means for initializing the measuring means.

[0009]

[Action]

 According to the invention of claim 1, the detected illuminance detected by the illuminance detection means is compared with the reference illuminance, and when the state where the indoor illuminance is low continues for the set time, the combustion equipment is extinguished. In the control of this combustion device, the illuminance comparison means having different reference illuminances are used for comparison, and the measuring means has a plurality of set times based on the illuminance difference between the reference illuminance and the detected illuminance, and corresponds to the illuminance difference. It measures the continuous time.

For this reason, for example, when the detection area of the illuminance detection unit is slightly dark at dusk or when the illuminance difference is small, that is, when the difference in illuminance is small, the person is not in a sleeping state. A long setting time is selected from the setting times of. Further, for example, when only the miniature bulb or the miniature bulb of the fluorescent lamp is turned on, that is, when the illuminance difference becomes slightly large, the set time of the intermediate length is selected from the set times. Furthermore, when all the fluorescent lights in the room are turned off, that is, when the illuminance difference becomes very large, a person is completely sleeping, so a short set time is selected.

[0011] Thus, when the possibility that a person is sleeping is high, the fire is extinguished in a short time, while when the possibility is low, the combustion device is operated for a long time. The automatic fire extinguishing action of is adapted to the actual condition of human life.

According to the invention of claim 2, when the illuminance in the room becomes larger than any of the reference illuminances during the measurement of the duration of the measuring means, the measuring means is initialized, so that the illumination in the room If the lighting is turned on again after a short time after turning off, the steady combustion of the combustion equipment is continued.

[0013]

【Example】

 1 to 3 show an automatic fire extinguishing system for an oil stove according to the present invention. FIG. 1 is a schematic view showing the structure of the oil stove.

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, a characteristic feature of the present invention is an automatic fire extinguishing device for extinguishing the combustion device 7 based on the indoor illuminance.

FIG. 2 is an electric circuit diagram showing the structure of this automatic fire extinguisher. In the figure, 8 is an illuminance detecting means for detecting the indoor illumination, for example, an optical sensor composed of a CdS photoconductive cell, and is installed on the upper upper surface of the stove body 1 as shown in FIG. .. The resistance value of the optical sensor 8 increases when the illuminance in the room decreases, and conversely, the resistance value decreases when the illuminance increases.

Reference numeral 9 is an illuminance comparing means for comparing the illuminance detected by the optical sensor 8 with a preset reference illuminance. The illuminance comparison means 9 connects the optical sensor 8 and the resistor 10 in series and outputs a detection voltage from the midpoint of the connection, and the resistors 11 to 14 are connected in series, and the midpoint of each connection. From the detection unit side to the reference unit side, the comparators 15a to 15c compare the voltages from the detection unit side and the reference unit side to determine whether the indoor illumination is smaller than the reference illuminance. Here, the reference voltage of the comparator 15a is set to, for example, a detection voltage corresponding to 30 lux, which is the illuminance in the room when the detection region of the optical sensor 8 is slightly dark due to a dusk. In addition, the reference voltage of the comparator 15b is set to the room illumination when only the miniature bulb of the moonlight or the fluorescent lamp is turned on, that is, the detection voltage corresponding to 1 lux. Further, the reference voltage of the comparator 15c is set to the detection voltage corresponding to the indoor illuminance when all the fluorescent lamps in the room are turned off, that is, 0.1 lux. In the comparators 15a to 15c set in this way, a low level signal is output when the indoor illuminance is higher than the reference illuminance, and conversely, when the indoor illuminance is lower than the reference illuminance, a low level signal is output. The signal is output.

Reference numeral 16 is a switching means for switching the operation and non-operation of the illuminance comparing means 9. The switching means 16 is connected so as to bypass the optical sensor 8, and a switching switch 17 is inserted in the bypass portion. That is, when the changeover switch 17 is open, the voltage corresponding to the indoor illuminance is output to the comparators 15a to 15c. Conversely, when the switch 17 is closed, Even if the indoor illuminance changes, a predetermined voltage (a voltage higher than each reference voltage) is output, and the action of the illuminance comparison means 9 is not exerted.

Reference numeral 18 denotes a CPU having a microcomputer configuration with a built-in timer, which controls the combustion equipment drive circuit 20 and the notification device drive circuit 21 based on the output signals from the comparators 15a to 15c and the signal from the operation switch 19. The combustion device 7 and the notification device 22 installed in the stove body 1 in FIG. 1 are driven and controlled.

FIG. 3 is a flow chart showing drive control of the combustion device 7 and the notification device 22 by the CPU 18. That is, when the changeover switch 17 is opened and the operation switch 19 is turned on, the combustion device 7 burns to heat the room (S1, S2).

Here, when the room is bright, that is, when the fluorescent lamp is turned on even during the daytime or at night, the indoor illuminance (E) is larger than the reference illuminance (E _s1 ) and is output from the illuminance comparison means 9. The signal is low, and the steady combustion operation is continued (S3). When extinguishing the oil stove, the operation switch 19 may be turned off (S4).

As described above, when the room is bright, the oil stove continues to be in steady combustion, but when the fluorescent lamp is turned on at dusk or at night, the detection area of the optical sensor 8 is exposed. When there is a shadow or when there is a shadow, the detected illuminance is about 30 to 5 lux. That is, when it is determined in step 3 that the indoor illuminance is less than 30 lux (E _s1 ), it is further determined whether the indoor illuminance is less than 1 lux (E _s2 ) (S5), and when it is greater than 1 lux. A set time of, for example, 30 minutes (T ₁ ) is set in the timer (S6), and timer counting is performed (S7). Here, it is judged again whether the indoor illuminance (E) is larger than the reference illuminance (E _s1 ) (S8), and when it is larger, that is, when there are no figures or objects, the timer is initialized. (S9), steady combustion is continued. On the other hand, when the time is up (S10), the notification device 22 is driven (S11), and the process proceeds to step 4 to extinguish the combustion device 7.

By this series of control, when there is a person or an object in the vicinity of the oil stove and there is a risk of burn or fire, it is possible to prevent it. Also, since the set time is set long, when going out for shopping at dusk, for example, re-ignition of the oil stove is not necessary unless the going-out time is long.

On the other hand, when it is determined in step 5 that it is smaller than 1 lux, and further that it is 0.1 lux (E _s3 ) or more (S12), that is, for example, only the moonlight or the miniature bulb of the fluorescent lamp is turned on. When the indoor illuminance is the same as when there is, the timer is set to a set time of, for example, 5 minutes (T ₂ ) (S13). Since there is a high possibility that such a state of indoor illuminance is just a state of sleeping or no people, the process proceeds to step 7 and the above-described series of control is performed to extinguish the combustion device 7.

Further, when the indoor illuminance is less than 0.1 lux in step 13, the indoor lighting is completely turned off in the room, and the person is sleeping or there is no person. A time, for example, 1 minute (T ₃ ) is set (S14), and the process proceeds to step 7 to extinguish the combustion device 7.

As described above, according to this embodiment, the oil stove is automatically extinguished based on the indoor illuminance, so that it is possible to prevent unnecessary increase in running cost, and the time until extinguishing the fire is the indoor illuminance. Therefore, the extinguishing time of the combustion device 7 corresponds to the living condition.

Further, during the measurement of the duration of the dark state, the timer is initialized when the illuminance in the room becomes larger than the reference illuminance. Therefore, after turning off the light in the room, the light is turned on again for a short time. If so, steady combustion is continued.

Further, the automatic fire extinguishing function can be activated by the switching means 17 or can be selected appropriately so that it does not operate. When the illuminance comparing means 9 is not used, normal manual combustion is performed. The device 7 is turned on / off.

Although the resistance values on the reference portion side of the illuminance comparing 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 types of miniature electric bulbs, etc. that light up when sleeping.

[0030]

As described above, according to the first aspect of the invention, the oil stove is automatically extinguished at bedtime based on the indoor illuminance, so that the running cost can be prevented from being unnecessarily increased. Since the fire extinguishing time corresponds to the indoor illuminance, this fire extinguishing time corresponds to actual living conditions.

According to the invention of claim 2, the measuring means is initialized when the illuminance in the room becomes larger than the reference illuminance during the measurement of the duration time of the measuring means. If the lighting is turned on again after a while, the steady combustion of the combustion equipment will continue. Therefore, the combustion device is extinguished when the person is sure to go to bed.

[Brief description of drawings]

FIG. 1 is a schematic view showing the structure 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]

7 ... Combustion equipment, 8 ... Optical sensor, 9 ... Illuminance comparison means, 18
… CPU.

Claims (2)

[Scope of utility model registration request] 1. An illuminance detection means for detecting illuminance in a room, an illuminance comparison means for comparing the illuminance detected by the illuminance detection means with each reference illuminance, and an illuminance comparison means. With a plurality of setting times set corresponding to the magnitude of the illuminance difference when the indoor illuminance compared by the means is smaller than each reference illuminance, and a measuring means for measuring the duration of the small illuminance, A petroleum strike consisting of a fire extinguishing means for extinguishing the combustion equipment when the duration measured by the measuring means is compared with each set time and the duration exceeds this set time.
Automatic fire extinguishing device for bu. 2. An initialization means for initializing the measuring means when the illuminance in the room becomes higher than any of the reference illuminances while measuring the duration of the measuring means. Automatic fire extinguishing system for the oil stove described.