JPS63267822A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To make it possible to actuate an automatic aseismatic fire extinguisher under oxygen deficiency and to lock the same at the time of normal fire extinguishment by providing a thermal deformation element sensing a temperature fluctuation under oxygen deficiency in the room and changing its position and also providing a normal fire extinguishing lock lever having an operating knob at one end of an operating frame pushing an interlocking member and engaging the same with an engaging part. CONSTITUTION:When indoor air becomes oxygen deficient, the temperature in the vicinity at the central part B of the side surface of a combustion cylinder 6 lowers. This displaces a bimetal 5 disposed on the side surface of the combustion cylinder 6. When an interlocking member 8 having an inverted L-shaped tip end is rotated in the direction indicated by arrow the interlocking member 8 is disengaged from an engaging part 13 and lowers. As a result, an automatic aseismatic fire extinguisher operates through an operating frame 9 provided at the lower end of the interlocking member 8 and extinguishes fire. At the time of normal fire extinguishment, when an operating knob 17 is pushed up, the interlocking member 8 is pushed up by a normal fire extinguishing lock lever 15 through an operating frame 9. Therefore, even when the temperature lowers, it is possible to lock the automatic aseismatic fire extinguisher 7 under oxygen deficiency so that it cannot operate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a safety device for an open type combustor that safely extinguishes the fire in the event of abnormal combustion such as an indoor oxygen deficiency.

Conventional technology Conventionally, open combustors such as kerosene stoves are open indoors, so the combustion exhaust gas can reduce the oxygen concentration in the room, creating a risk of oxygen deficiency. 1 As a safety device for abnormal combustion due to lack of oxygen in open type combustors such as kerosene stoves, Japanese Patent Application Laid-Open No. 58-9
As in Publication No. 9620, a device detects oxygen deficiency with an oxygen deficiency detection sensor installed on the exterior above the combustion cylinder, and uses the output from the oxygen deficiency detection sensor to make a judgment by a control circuit that operates an alarm means or combustion stop means to issue an alarm or extinguish the fire. is published.

Also, Utility Model Publication No. 50-55239 and Utility Model Publication No. 56-
As stated in Publication No. 20707, in the event of an emergency fire extinguishment or abnormal combustion (abnormal temperature rise), the temperature at the location where the temperature changes compared to the temperature during normal combustion (for example, near the core outer cylinder or inside the fire pan) should be Heat deformable element (e.g. bimetal)
By utilizing the deflection force of the thermal deformation element, the operating frame linked to the automatic seismic fire extinguishing system is moved at the time of abnormal combustion to activate the automatic seismic fire extinguishing system and extinguish the fire.

Problems to be Solved by the Invention The oxygen deficiency detection sensor has a structure that is installed on the exterior above the combustion cylinder, and the sensor extracts an electrical signal and activates the seismic sensor using a solenoid to electrically extinguish the fire. It could not be detected when it was exhausted.

In addition, with a structure in which the operating frame is placed in contact with the heat deformable element, there are problems such as it is only effective in the case of abnormal combustion (when the flame becomes abnormally large) and is not effective in reducing the temperature in the case of oxygen deficiency. was there.

On the other hand, when a fire is normally extinguished, the temperature of the detection unit equipped with a heat deformable element gradually decreases until the fire is completely extinguished, just as in the case of oxygen deficiency. The problem was that the anti-seismic automatic fire extinguishing system was activated and extinguished the fire more quickly than in normal fire extinguishing conditions, making it unsuitable for use due to the excessive odor it produced during the extinguishing process.

In addition, when dry firing the core, the temperature of the detection part provided with a heat deformable element gradually decreases until the dry baking is completely completed, as in the case of oxygen deficiency, so the oxygen deficiency device works and automatically takes countermeasures. The earthquake automatic fire extinguishing system activates and extinguishes the fire.

Therefore, there was a problem in that the core could not be completely dry-fired.

Means for Solving the Problems The present invention is designed to prevent temperature changes during indoor oxygen deficiency from contacting or near a position from the top to the center of the side surface of the combustion cylinder placed on the core guide tube that guides the core or the core outer tube. A heat deformation element that senses and displaces is provided, an interlocking body is provided via an operating frame that operates an anti-seismic automatic fire extinguishing device in response to the heat deformation element, and a locking part that locks the interlocking body is When the anti-seismic automatic fire extinguishing system is set, an operating frame is provided below the interlocking body to push the interlocking body upward and lock it in the locking part. A normal fire extinguishing lock lever having an operating knob is provided at one end of the operating frame so as to move the operating frame.

When the interlocking body set in the action locking part is abnormally burned due to lack of oxygen,
By displacing the heat deformable element (hereinafter referred to as bimetal), it is released and its interlocking body is suddenly lowered, thereby properly operating the anti-seismic automatic fire extinguishing system.

That is, the interlocking body is disengaged from the locking part by the deflection force of the bimetal, and the anti-seismic automatic fire extinguishing device is activated by the spring force to extinguish the fire.

In addition, here, since the structure is such that the interlocking body is moved by the heat deformation element while the temperature is cooling down, the heat deformation element ( bimetal) hit, and the tip of the bimetal bent, allowing it to overcome the interlocking body. This may cause the bimetal to deform, so the door opens freely in the direction in which the bimetal shifts due to temperature rise, but does not open in the opposite direction. By providing it at the tip of the door, the one-way door opens even when the bimetal hits the interlocking body during the temperature rise at the initial stage of ignition, allowing the bimetal to smoothly cross over the interlocking body.

Also, when setting the interlocking body to the locking part of the guide plate, a compression spring is used to push up the interlocking body and rotate the interlocking body in the direction of the locking part, and a rotational force in the direction of the locking part is applied to this spring. By providing this additionally, the interlocking body can be rotated toward the locking portion by simply pushing it up, and can be set in the locking portion.

In addition, when normally extinguishing a fire, an operating knob is used to lower the wick, and an oxygen-deficient extinguishing lock lever is linked to this, and by pushing up and fixing the interlocking body through the operating frame, automatic vibration control in the event of an oxygen deficiency is provided. Lock the fire extinguisher. In other words, 1. When normally extinguishing a fire, by moving the operating knob that lowers the wick in the extinguishing direction, the operating frame linked to this operating knob prevents the interlocking body from moving downward, and the anti-seismic automatic fire extinguishing system in the event of oxygen deficiency locked.

Also, when the wick is raised using the operating knob for normal combustion, this fire extinguishing lock lever rotates, and the anti-seismic automatic extinguishing system in the event of oxygen deficiency is unlocked, and the interlocking body becomes free, allowing the automatic anti-seismic extinguishing system to function in the event of oxygen deficiency. will be able to operate freely.

In addition, by setting the dry-firing Rotuta knob when dry-firing the core,
The operating frame that is linked to this pushes up the interlocking body so that it cannot move downwards, and locks the anti-seismic automatic fire extinguishing system in the event of an oxygen shortage. In other words, when dry-firing the core, if the dry-firing lock knob is set along the slope of the dry-firing lock guide, the interlocking body cannot move downward via the operating frame, and the anti-seismic automatic fire extinguishing system is locked in the event of oxygen deficiency. Ru. Moreover, when the dry firing is completed, by removing the set of the dry firing lock knob, the interlocking body becomes free, and the anti-seismic automatic fire extinguishing system in the case of oxygen deficiency becomes operable.

Example An embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a wick that sucks up liquid fuel from a tank and evaporates it. The core 1 is held by a core guide tube 2 on the inside and a core outer tube 3 on the outside. Core guide tube 2 and core outer tube 3
A combustion cylinder 6 is provided at the upper end of the cylinder. A thermal deformation element 5 (here, explained using a bimetal) is in contact with or near a position from the center part B to the upper part A of the side surface of the combustion tube 6.
is provided so as to be in contact with one end of an interlocking body 8 which is interlocked with the anti-seismic automatic fire extinguishing device 7 via an operating frame 9. This interlocking body 8 is provided with a spring 10 (the same effect can be obtained with a weight) that biases and compresses the interlocking body 8 downward, and the force of this spring 10 acts to push down the interlocking body 8. An operating frame 9 is provided in contact with or passing through the lower end of the interlocking body 8, and the other end of the operating frame 9 is provided in contact with the anti-seismic automatic fire extinguishing device 7.

The tip of the interlocking body 8 has an inverted shape, and is set in the locking portion 13 when the anti-seismic automatic fire extinguishing system is set in the event of oxygen deficiency. The upper end of the compressible spring 10 provided on the interlocking body 8 is fixed to the guide plate 22, and the lower end thereof is fixed to the interlocking body 8.

Note that this compressing spring 10 connects the tip of the interlocking body 8 to the locking part 1.
It is twisted and set so that it can be rotated in three directions.

Also, at the tip of the bimetal 5 that contacts the interlocking body 8.

A one-way opening door 12 is provided via a shaft 23, and with the shaft 23 as a fulcrum, this [1]
2 can be opened freely, but conversely, it can be closed in the direction in which the temperature decreases.

Further, the operating frame 9, which is disposed at the lower end of the interlocking body 8 so as to be movable about the shaft 16, usually has a fire extinguishing lock lever 1.
5 are provided so that they interlock by contacting or passing through,
This normal fire extinguishing lock lever 15 is configured to move up and down via a shaft 16, and an operating knob 17 is provided at the other end.

The shaft 16 is also provided with a lever (not shown) for moving the core 1 up and down.

Further, a dry firing lock knob 18 is provided at the other end of the operating frame 9 provided at the lower end of the interlocking body 8.
8 is provided with a shaft that is guided as a fulcrum 20 so as to be movable along an inclined surface 21 provided on the dry firing lock guide 19.

The operation of the above configuration will be explained next.

During steady combustion, the temperature near the center B of the side surface of the combustion tube 6 maintains a temperature of <T1 as shown in FIG. The combustion reaction near the tip of the wick 1 is delayed, the temperature at which the reaction occurs is lowered, and the amount of combustion is reduced.

Therefore, the temperature near the center B of the side surface of the combustion tube 6 decreases as shown at T3. Furthermore, the sides of the combustion tube 6 (A, B,
Looking at the temperature change due to oxygen deficiency at position C), as shown in Figure 5, the temperature decreases as the oxygen concentration decreases, and the temperature change up to 18% oxygen concentration is TA > TB > TC (A >
It can be seen that the temperature change is the largest at B>C) and the upper part A, which is an advantageous position when considering the displacement of the bimetal 5. However, concentration changes can be detected even at 0 parts, making it a possible oxygen deficiency detection position. Here, by utilizing this temperature change, the bimetal 5 provided on the side of the combustion tube 6 is deflected, and by utilizing the deflection force of this bimetal 5, when oxygen is depleted, the tip is bent into a reverse shape as shown in Fig. 3. Interlocking body 8 having
When rotated in the direction of the arrow by the deflection force of the bimetal 5, the reversely shaped interlocking body 8 is released from the locking part 13, and the spring 1
The anti-earthquake automatic fire extinguishing device 7 is operated via an operating frame 9 provided at the lower end of the interlocking body 8 which lowers due to force or its own weight to extinguish the fire.

Here, when the temperature is rising, even if the one-way opening door 12 provided at the tip of the bimetal 5 hits the interlocking body 8, s12
opens and allows the user to easily climb over the interlocking body 8.

Next, when setting the anti-seismic automatic fire extinguishing device 7 in case of oxygen deficiency, when the interlocking body 8 is pushed up through the operating frame 9, the interlocking body 8
The tip of the inverted shape is compressed by the rotational force of the spring 10,
It can be automatically rotated toward the locking portion 13 and set in the locking portion 13.

Further, an operating frame 9 is provided at the lower part of the interlocking body 8,
At the other end of this operating frame 9, a normal fire extinguishing lock lever 15 is connected via a shaft 16 and rotates when the operating knob 17 is raised in the extinguishing direction.6 When the operating knob 17 is pushed up during normal extinguishing, the operating frame Interlocking body 8 through 9
is pushed up, and it is an automatic fire extinguishing system for normal fire extinguishing, and even when the temperature drops, there is a lack of oxygen! ! 17 can be locked so that it cannot operate.

Further, a dry firing lock knob 18 is provided at the lower part of the interlocking body 8, and if this dry firing lock knob 18 is set along the inclined surface 21 of the dry firing lock guide 19 in the direction of the arrow, the operating frame 9 When the interlocking body 8 is pushed up through the blank firing, the anti-seismic automatic fire extinguishing system w7 cannot be activated even if the temperature drops, and complete dry firing can be carried out.

Effects of the Invention As described above, according to the present invention, when an open-type combustor such as a kerosene heater is used, the interlocking body can be disengaged from the locking part by the biasing force of the bimetal in an indoor oxygen-deficient condition that is considered to be dangerous. The anti-earthquake automatic fire extinguishing system can be operated properly with good responsiveness by the force of the spring installed in the body.

Furthermore, even during ignition, the bimetal is not stopped by the interlocking body and can smoothly pass over the interlocking body through the one-way opening door.

In addition, to set the fire extinguishing system in the event of oxygen deficiency, simply push up the interlocking body with the operating frame, and the reverse-shaped tip of the interlocking body will automatically rotate toward the locking part due to the rotational force of the spring, and will attach to the locking part. Can be set.

In addition, when normally extinguishing a fire, simply by raising the operating knob in the direction of extinguishing, the operating frame pushes up the interlocking body and automatically locks the fire extinguishing device in the event of oxygen deficiency, and the fire extinguishing device in the event of oxygen deficiency does not operate during normal extinguishing.

In addition, when the wick is dry-fired, by setting the dry-fire lock knob, the operating frame pushes up the interlocking body and fixes the fire extinguishing device in the event of oxygen deficiency, making it impossible to operate, making it possible to completely dry-fire. It is a useful thing that can be done.

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional view of essential parts of a safety device for an open type combustor according to an embodiment of the present invention, and FIGS. 2 and 5 show a combustion tube in the case of oxygen deficiency in the safety device for an open type combustor according to the present invention. 3 and 4 are perspective views of essential parts of a safety device for an open type combustor according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Core, 2... Core guide cylinder, 3... Core outer cylinder, 5... Heat deformation element, 7... Anti-seismic automatic fire extinguishing device, 8... Interlocking body, A, B , C... Combustion tube side position, 6... Combustion tube, 9... Operating frame, 13...
Locking part, 15...Normal fire extinguishing lock lever 117...
・Operation knob.

Claims (1)

[Claims] Temperature changes during indoor oxygen depletion may occur in contact with or in the vicinity of the wick guide tube (2) that guides the wick (1) and the combustion tube (6) placed on the core outer tube (3) from the top to the center of the side surface. A heat deformation element (5) that senses and displaces the heat deformation element (5) is provided, and the heat deformation element (5)
An interlocking body (8) whose upper end is shaped like an inverted L via an operating frame (9) that operates an anti-seismic automatic fire extinguishing system (7) in response to
In the safety device for an open type combustor, the locking part (13) for locking the interlocking body (8) is provided near the heat deformation element (5). ) When set, an operating frame (9) is disposed below the interlocking body (8) that pushes the interlocking body (8) upward and locks it in the locking part (13), and the operating frame (9) A normal fire extinguishing lock lever (15) having an operating knob (17) at one end of the operating frame (9) to move the
A safety device for an open type combustor, which is characterized by the provision of.