JPS5993116A - Liquid fuel burner device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a hazard through detection of oxygen deficiency, by operating a safety device through utilization of a fact that an electromotive force is decreased when combustion is deteriorated owing to oxygen deficiency. CONSTITUTION:With an ignition button 5 is pressed, an ignition heater 9 is brought near to the vicinity of a wick 6, and with a switch 8 being pressed, the voltage of a battery 7 is fed to the ignition heater 9 for firing. Kerosene evaporated from the wick 6 is burnt in a normal combustion state between an inner flame cylinder 12 and an outer flame cylinder 13 to make the inner and outer flame cylinders 12 and 13 to a red heat. If the amount of oxygen in the air is decreased, the electromotive force of an element 14 is reduced, a solenoid 24a is actuated, a ratchet gear 21 is disengaged from a catching mechanism 22, and the wick 6 is lowered to bring combustion to a stop. This allows prevention of the occurrence of a hazard through operation of a safety means before carbon monoxide is generated due to oxygen deficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a liquid fuel combustion device for detecting oxygen deficiency, and is designed to accurately detect an acid state.

Conventional structure and its problems In general, wick-type kerosene stoves, there is no device that controls combustion by detecting the oxygen level in the atmosphere or the carbon monoxide concentration due to poor combustion. Since C is not home, I open the window about once an hour to ventilate the room. However, this is fine if you are careful enough, but it can be dangerous if you fall asleep and forget to ventilate the room.

Purpose of the Invention Therefore, an object of the present invention is to create an oxygen-deficient state and operate a safety means using a controller to prevent danger.

Structure of the Invention The present invention uses a temperature detection element such as a thermocouple to determine the combustion state by detecting a high electromotive force during normal combustion, and detecting a low electromotive force when the combustion condition worsens due to oxygen deficiency. It takes advantage of the fact that it will happen and puts safety measures into effect.

EXAMPLE Hereinafter, an example of the present invention will be explained based on Attachment 1=J.

As shown in Figures 1 to 3, a combustion tube 3 is provided in the upper space of a box-shaped exterior body 1 with two open front parts. A reflecting plate 2 is provided.

Also, by rotating the rotary knob 4, the wick inside the combustion node 3 (which is constantly urged downward by a spring).
6 is 1hi lower 0]' Noh. When the ignition button 5 is pressed when the wick 6 rises, the -C switch 8 is closed, and voltage is supplied from the ignition heater 9 to the ignition heater 9, and the ignition heater 9 is pushed by the wick 6. ignition is performed.

At this time, the wick 6 is sucking up the kerosene stored in the fuel r1 tank 10 by the capillary U phenomenon, so that the kerosene is ignited by the ignition heater 9. Note that inside the combustion tube 3 there are an inner flame tube 12 and an outer flame tube 13 having a large number of air holes, and air for combustion is supplied between the two tubes 12 and 13 by a draft (arrow A).

Inside the combustion tube 3, there is an inner flame section 12 and an outer flame tube 13.
While the combustion flame rises through this gap, the inner and outer flame tubes 12 and 13 become red hot. However, when there is a lack of oxygen, kerosene stoves generally have poor combustion conditions, may have poor exhaust threads, and generate carbon oxide. However, although the exhaust B is exhausted above the combustion node 3, outside air comes in like C, so it may be difficult to detect oxygen deficiency using the exhaust. Even if there is a lack of oxygen, carbon monoxide is not necessarily generated. Therefore, in this embodiment, such oxygen deficiency detection is not performed using exhaust gas, but is operated by detecting the temperature of the combustion tube 3.

In a kerosene stove with such a configuration, combustion between the red-hot inner and outer flame tubes 12 and 13 becomes poor due to lack of oxygen, and as a result, the temperature gradually decreases from below the inner and outer flame tubes 12 and 13, depending on the oxygen concentration. The temperature went down, and what had been red hot turned black.
Only the upper part of the combustion tube 3 is red hot. When the oxygen concentration reaches about 16 degrees, only the upper part becomes completely red hot, and the lower part completely turns black. However, the combustion has not completely stopped, and the kerosene from the wick 6 continues to vaporize, so the combustion continues, and the amount of carbon oxide gradually increases until it becomes dangerous. Therefore, in this embodiment, an element 14 made of a thermocouple is provided approximately at the center of the outside of such an outer flame tube 13 to detect the temperature at the time of oxygen deficiency. Note that the outer side of the outer flame tube 13 is made of heat-resistant glass 15, and is structured so that its red-hot state can be seen from the outside. The characteristics of this element 14 are shown in FIG. 4, and it can be seen that the electromotive force changes depending on the oxygen concentration.

The electromotive force of the element 14 that functions in this manner reaches the division 1n circuit 17. Voltage is supplied to the control circuit 17 from the dry battery 7 through a lead wire 18 .

On the other hand, a cam 19 is provided coaxially with the rotary knob 4 so as to rotate the rotary knob 4 and push the lamp wick 6 in the -L direction. The structure is such that the switch 2o is operated. This microswitch 2o is interposed in the power supply circuit between the dry cell battery 7 and the control circuit 17 as shown in FIG. In addition to the cam 19, a ratchet gear 21 and its locking mechanism 22 are attached coaxially with the rotary knob 4. Furthermore, a pendulum mechanism 23 and a knob 24 of an anti-earthquake automatic fire extinguishing system (hereinafter referred to as "earthquake extinguishing") that operates due to earthquakes, etc. are installed to release the first system of the ratchet gear 21 from the locking mechanism 22, respectively. . Further, the solenoid 24a operated by the oxygen deficiency signal sent from the control circuit 17,
It is attached so that the pendulum mechanism 23 can be moved when oxygen deficiency is detected. In other words, except in the case of earthquake damping,
Even in the case of an oxygen deficiency, the ratchet gear 21 is unlocked by the locking mechanism 22 in the same way as when the quake is activated, and the lamp wick 6 can be quickly lowered to extinguish the fire.

First, the general operation of the above configuration will be explained.

First, turn the rotary knob 4 to raise the wick 6 to three sides (Figure 2 shows it already raised).

At the same time, the microswitch 20 is closed by the cam 19, and a voltage is applied to the control circuit 17 shown in FIG. 6, thereby entering the oxygen deficiency detection range. In this state, the ignition button 6 is pressed to bring the ignition heater 9 close to the lamp wick 6, and the switch 8 is pressed to supply the voltage of the dry battery 7 to the ignition heater 9 to ignite it. When you release your hand after ignition, the ignition button 5 returns to its original position.

By doing this, from now on, the kerosene vaporized from the wick 6 will be transferred to the inner flame cylinder 12. Normal combustion occurs between the outer flame tube 13 and the inner and outer flame tube 1
Make 2 and 13 red hot.

Most of the heat generated by combustion is reflected forward by the reflecting plate 2 and transmitted to the front as reflected heat.

Assuming that the amount of oxygen in the air decreases in one house like this, and the amount of oxygen in the air decreases by about 17%, the electromotive force of the element 14 will be
It will drop.

At this time, the solenoid 24a shown in FIG. 3 moves, and the locking of the ratchet gear 21 by the locking mechanism 22 is released.
The wick 6 descends to stop combustion.

FIG. 5 shows the sub 1i11 circuit, in which the dry battery 7 is
A closed circuit is formed by the point-push button switch 8 and the ignition heater 9-b. From point a, micro switch 20-
It is connected to point a - solenoid 24a - transistor 11 - point b. From point 0, resistance 16 - point d - resistance 26
is connected to point b, the negative side of element 14 is connected to point d, and the positive side forms a closed loop with resistor 27 to point e - resistor 28 to point d. The positive and negative input points of the operational amplifier 29 are connected through points e and d.The output point f enters the timer circuit 25 and its output point q.
connects resistor 3oh point to resistor 31 to b point. Note that the base of the transistor 110 is connected to the point h.

The operation of this circuit will be explained. Micro switch 2
o is closed and the push button 8 is not pressed, the lamp wick 6 is ignited by the ignition heater 9, but voltage is also applied to the control circuit 17 and the circuit operates. Initially, since the temperature of the element 14 is low, no electromotive force is generated, so the output point f of the operational amplifier 29 is low. However, since the signal at the output point f is not transmitted to point q by the timer circuit 25, the solenoid 24& does not operate. When the temperature rises after a while, the output point f of the operational amplifier 29 becomes high. Combustion becomes stable when the timer circuit 26 is set to approximately 20 minutes. Timer circuit 2
6, as time passes, when the input point f is high, the output q point becomes low, and when the input f point is high, the output q point becomes high. If there is an oxygen deficiency, the potential at point f will drop, so point q will become high, and the transistor 11 will operate, causing the solenoid 24a to operate and strike the attachment mechanism 23.
The locking mechanism 22 releases the ratchet 21, the clamp 4 returns to its original position, the wick 6 closes, and combustion stops.

Effects of the Invention Since the non-explosion TJA detects oxygen deficiency based on the temperature of the combustion section, it is safe because it operates even if carbon monoxide is not generated due to oxygen deficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 is a sectional view of the same side, FIG. 3 is an IE view of the same, FIG. 4 is a characteristic diagram, and FIG. It is a drowsiness circuit diagram. 7...Dry battery (battery), 12--Inner flame cylinder, 13-
...Outer flame cylinder, 14...Element, 17--Control circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 10 Figure 3 22 4 27 2f

Claims (1)

[Claims] It has a combustion part, an element that detects the temperature of this combustion part and generates an electromotive force according to the temperature, and a control circuit that operates by the electromotive force of this element, and the combustion temperature of the combustion part decreases due to oxygen deficiency. and a liquid fuel combustion device in which the control circuit operates a safety means.