JPS63267817A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To make it possible to safely extinguish fire under an extraordinary combustion such as oxygen deficiency or the like by providing an operating frame which pushes an interlocking member and engages the same with an engaging part and also providing a normal fire extinguishing lock lever having an operating knob at one end of the operating frame, at the time of setting an automatic aseismatic fire extinguisher. CONSTITUTION:When indoor air becomes oxygen deficient, the temperature on the surface or in the vicinity of a top plate 25 positioned at the upper part of a combustion cylinder 6 is lowered. This displaces a bimetal 5 disposed in contact with or in close vicinity to the surface of the top plate 25. When an interlocking member 8 having an L-shaped tip end is rotated in the direction indicated by arrow by utilizing this displacement force, the interlocking member 8 is disengaged from an engaging part 13 and lowers. As a result, an automatic aseismatic fire extinguisher 7 operates through the operating frame 9 provided at the lower end of the interlocking member 8 and extinguishes fire. At the time of a normal fire extinguishment, when an operating knob 17 is pushed up, the interlocking member 8 is pushed up through the operating frame 9 by a normal fire extinguishing lock lever 15. Therefore, even when the temperature is lowered, the automatic aseismatic fire extinguisher 7 can be locked so that it cannot be operated.

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. As you can see, Japanese Patent Application Laid-Open No. 58-9 is a safety device for abnormal combustion due to lack of oxygen in open type combustors such as kerosene stoves.
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.

In addition, 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 seismic automatic fire extinguishing system is moved at the time of abnormal combustion, thereby activating the seismic automatic fire extinguishing system and extinguishing the fire.

Problems to be Solved by the Invention Since the oxygen deficiency detection sensor is installed on the exterior above the combustion cylinder, it cannot properly detect the temperature of the flame during oxygen deficiency abnormal combustion. Furthermore, due to the structure in which the operating frame is placed in contact with the thermal deformation element, there are problems such as poor responsiveness of the operating frame due to thermal displacement, which may make it impossible to properly operate the seismic automatic fire extinguishing system or alarm means. there were.

On the other hand, when a fire is normally extinguished, the temperature of the detection part 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 oxygen-deficient device in the firebox was activated and the seismic automatic fire extinguishing system was activated to extinguish the fire faster than in normal firefighting, making it unsuitable for use due to the excessive odor it produced during the firefighting process.

In addition, when dry firing the core, the temperature of the detection part, which is equipped 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 resets the core. 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 detects temperature changes during indoor oxygen deficiency in contact with or near the top plate located at the top of the wick guide tube that guides the wick and the combustion tube placed on the core outer tube. A heat deformable element is provided that is displaced by
An interlocking body having an L-shaped end is provided via an operating frame that operates the seismic automatic fire extinguishing device in response to the heat deformation element,
In the case where a locking part for locking the interlocking body is provided near the heat deformable element, an operating frame that pushes the interlocking body and locks it to the locking part is attached when the seismic automatic fire extinguishing system is set. A normal fire extinguishing lock lever is provided in response to the interlocking body and has an operating knob at one end of the operating frame 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 seismic automatic fire extinguishing system.

That is, the interlocking body is disengaged from the locking portion by the deflection force of the bimetal, and the spring force activates the seismic automatic fire extinguishing device 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, conversely, even when the temperature is rising, such as during ignition, 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 in the direction of the locking part by simply pushing it up, and can be set in the locking part.

In addition, when normally extinguishing a fire, an operating knob is used to lower the wick, and an oxygen-deficient extinguishing lock lever is provided in conjunction with this, which pushes up and fixes the interlocking body through the operating frame, allowing for automatic shock control in the event of an oxygen deficiency. Lock the fire extinguisher. In other words, 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 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 lock of the seismic automatic fire extinguishing system in the event of oxygen deficiency is released, and the interlocking body becomes free, allowing the seismic automatic fire extinguishing system to operate in the event of oxygen deficiency. will be able to operate freely.

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 has a core guide tube 2 on the inside. The outer side is held by an outer core cylinder 3. Core guide tube 2 and core outer tube 3
A combustion cylinder 6 is provided at the upper end of the cylinder.

In contact with or near the top plate 25 located at the top of the combustion tube 6, a thermal deformation element 5 (here, explained using a bimetal) is interlocked with a seismic automatic fire extinguishing device 7 via an operating frame 9. It is provided so as to be in contact with one end of the interlocking body 8. This interlocking body 8 has a spring 1 that urges and compresses in the operating direction.
0 (the same effect can be obtained with a weight), and the force of this spring 10 works to push and operate the interlocking body 8. An operating frame 9 is provided in contact with or as a device at the end of the interlocking body 8, and the other end of the operating frame 9 is provided in contact with the seismic automatic fire extinguishing device 7.

The tip of the interlocking body 8 is L-shaped and is set in the locking part 13 when the seismic automatic fire extinguishing system is set in the event of oxygen deficiency. Compressing spring 1 provided on interlocking body 8
0 is fixed to the guide plate 22, and the other end 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 door 12 opens in the direction of deviation when the temperature rises.
It is designed to open freely and close in the direction of temperature drop.

Further, the operating frame 9, which is disposed at the 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 come into contact with each other.

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

Further, another dry firing lock knob 18 is provided at the other end of the operating frame 9 provided at the end of the interlocking body 8.

This dry firing lock knob 18 is provided with a shaft that is guided as a fulcrum 20 so as to be movable along an inclined surface 21 provided on a dry firing lock guide 19.

The operation of the above configuration will be explained next.

During steady combustion, the top plate 2 located at the top of the combustion tube 6
The temperature at or near the surface of 50 is shown in Figure 2.
However, when the combustion air enters an oxygen-deficient state, the combustion reaction near the tip of the wick 1 slows down, and the temperature at which the reaction occurs falls, reducing the amount of combustion.

Therefore, the temperature at or near the surface of the top plate 25 decreases as shown at T2. Here, by utilizing this temperature change, the bimetal 5 provided in contact with or near the surface of the top plate 25 is deflected, and the deflection force of the bimetal 5 is utilized to generate oxygen deficiency as shown in FIG. When the interlocking body 8 having an L-shape at the tip is rotated in the direction of the arrow by the biasing force of the bimetal 5, the interlocking body 8 with the opposite shape is detached from the locking part 13 and lowered by the force of the spring 10 or its own weight. The seismic automatic fire extinguishing device 7 is operated via the operating frame 9 provided at the lower end 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, the door 12
opens and allows the user to easily climb over the interlocking body 8.

Next, when setting the seismic automatic fire extinguishing system 7 in case of oxygen deficiency, when the interlocking body 8 is pushed through the operating frame 9, the L-shaped tip of the interlocking body 8 compresses the spring with a rotational force of 1°. As a result, 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 end of the interlocking body 8,
At the other end of this operating frame 9, a normal fire extinguishing lock lever 15 is movable via a shaft 16 when the operating knob 17 is raised in the extinguishing direction. Interlocking body 8 via operating frame 9
is pushed up and the automatic fire extinguishing device 7 can be locked so that it cannot operate even if the temperature drops during normal fire extinguishing.

Further, a dry firing lock knob 18 is provided at the end of the interlocking body 8, and by setting the dry firing lock knob 18 in the direction of the arrow along the inclined surface 21 of the dry firing lock guide 19, the operating frame 9 can be moved. The interlocking body 8 is pushed through the interlocking body 8 during dry firing, so that even if the temperature drops, the seismic automatic fire extinguishing device 7 cannot be activated, and complete dry firing can be performed.

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 force of the spring installed in the body allows the seismic automatic fire extinguishing system to operate properly and with good responsiveness.

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, 1. When normally extinguishing a fire, simply raising the operating knob in the direction of extinguishing will cause the operating frame to push up the interlocking body and automatically lock the fire extinguishing device in the event of oxygen deficiency, and the fire extinguishing device in the event of oxygen deficiency will 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 FIG. 2 is a sectional side view of a main part of a safety device for an open type combustor according to an embodiment of the present invention. FIGS. 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 tube, 3... Core outer tube, 5... Heat deformation element, 6... Combustion tube, 7
・・・Seismic automatic fire extinguishing system, 8... Interlocking body, 9...
- Operating frame. 13...Locking part, 15...Normal fire extinguishing lock lever 117...Operation knob.

Claims (1)

[Claims] Temperature during indoor oxygen deficiency when in contact with or near the top plate (25) located at the top of the combustion tube (6) placed on the core guide tube (2) that guides the core (1) and the core outer tube (3). A heat deformation element (5) that senses a change and displaces is provided, and the end is connected to the L through an operating frame (9) that operates an anti-seismic automatic fire extinguishing system (7) in response to the heat deformation element (5). In a safety device for an open type combustor, an interlocking body (8) having a shape is provided, and a locking part (13) for locking the interlocking body (8) is provided near the heat deformable element (5). When the seismic automatic fire extinguishing system (7) is set, the interlocking body (8
) to lock it in the locking part (13) (9)
is provided to respond to the interlocking body (8), and the operating frame (9)
An operating knob (1) is attached to one end of the operating frame (9) to move the
7) A safety device for an open type combustor, characterized by being provided with a normal fire extinguishing lock lever (15).