JPS63267815A - Safety device of open type burner - Google Patents

Abstract

PURPOSE:To make it possible to automatically operate an automatic aseismatic fire extinguisher to extinguish fire under oxygen deficiency by providing a thermal deformation element which senses a temperature fluctuation under oxygen deficiency within the room and changing its position, and also providing an air combustion locking knob which pushes an operating frame up to the side of an interlocking member and fixes the same at the lower part of the operating frame. CONSTITUTION:When indoor air becomes oxygen deficient, the temperature on the surface of a combustion cylinder 6 or in the vicinity thereof is lowered. Therefore, a bimetal 5 provided in contact with or in close vicinity to the surface of the combustion cylinder 6 is displaced. When an interlocking member 8 having an inverted L-shaped tip end is rotated in the direction indicated by arrow by utilizing the displacement force of the bimetal 5, the interlocking member 8 slips off from as 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. Further, at the time of no-fuel burning, when an air combustion locking knob 18 provided at the lower part of the interlocking member 8 is set in the direction indicated by arrow along the inclined surface 21 of an air combustion lock guide 19, the interlocking member 8 is pushed up through the operating frame 9, and the automatic aseismatic fire extinguisher 7 cannot operate and a complete no-fuel burning becomes possible.

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. Japanese Patent Application Laid-Open No. 1983-1989- It is used as a safety device for abnormal combustion due to lack of oxygen in open type combustors such as kerosene stoves.
As in Publication No. 99620, it is detected by an oxygen deficiency detection sensor installed on the exterior above the combustion cylinder, and based on the output from the oxygen deficiency detection sensor, a control circuit that operates an alarm means or combustion stop hand eel makes a decision to issue an alarm or extinguish the fire. The device is publicly available.

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 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.

In addition, due to the structure in which the operating frame is in contact with the heat deformable element,
There have been problems such as poor responsiveness of the operating frame due to thermal displacement, and it may not be possible to properly operate the anti-seismic automatic fire extinguishing system or alarm means.

On the other hand, when a fire is normally extinguished, the temperature of the detection section equipped with the heat deformable element 1 gradually decreases until the fire is completely extinguished, as in the case of oxygen deficiency. The anti-seismic automatic fire extinguishing system activates and extinguishes the fire faster than normal fire extinguishing, creating a problem in that the odor during the extinguishing process is so great that it is unsuitable for use.

In addition, when dry-firing the core, the temperature of the detection part provided with a heat deformable element gradually decreases until the dry-firing 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 provides a heat deformable element that is in contact with or in close proximity to a core guide tube that guides a core and a combustion tube that is placed on the core outer tube and is displaced by sensing a temperature change during indoor oxygen deficiency. , an interlocking body is provided via an operating frame that operates the anti-seismic automatic fire extinguishing device in response to the heat deformable element, and a locking part for locking the interlocking body is provided near the heat deformable element. In this case, an operating frame is disposed at the bottom of the interlocking body for pushing the interlocking body upward and locking it in the locking part, and a dry firing lock is further provided to push the operating frame toward the interlocking body and fix it during dry firing. A knob is provided at the bottom of the operating frame.

By displacing the interlocking body set in the action locking part during abnormal combustion due to lack of oxygen, the thermal deformation element (hereinafter referred to as bimetal)
When the interlocking body is released and suddenly lowered, the anti-earthquake automatic fire extinguishing system is activated properly.

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, 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 toward the locking portion by simply pushing it up, and can be set in the locking portion.

In addition, an operating knob is used to lower the wick during normal fire extinguishing, and a fire extinguishing lock lever is provided in conjunction with this to push up and fix the interlocking body, thereby locking the anti-seismic automatic fire extinguishing system in the event of oxygen deficiency. 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 anti-seismic automatic fire extinguishing system in the event of oxygen starvation. 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.

Also, by setting the dry firing lock knob when dry firing the core,
This will push up the interlocking body so that it cannot move downwards and lock the automatic fire extinguishing system in the event of an oxygen shortage. That is, when dry-firing the core, if the dry-firing rotary knob is set along the inclined surface of the dry-firing lock guide, the interlocking body cannot move downward, and the anti-seismic automatic fire extinguishing device is locked in the event of oxygen deficiency. Also, when dry firing is completed, by removing the dry firing lock knob set,
The interlocking body becomes free, and the anti-seismic automatic fire extinguishing system becomes operational in the event of oxygen deficiency.

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 (described here using a bimetal) is in contact with or near the surface of the combustion tube 6 and is attached to an operating frame 9.
It 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 the interlocking body. This interlocking body 8 is provided with a spring 10 (the same effect can be obtained with a weight) that biases downward and compresses the interlocking body 8.
It works to push down the An operating frame 9 is provided at the lower end of the interlocking body 8 in contact with or passing through it.

The other end of this operating frame 9 is provided so as to be 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 compressed spring 1
0 is set by twisting so as to rotate the tip of the interlocking body 8 toward the locking portion 13.

Furthermore, a one-way opening door 12 is provided at the tip of the bimetal 5 in contact with the interlocking body 8 via a shaft 23, and this door 12 can be freely opened in the direction of temperature rise and deviation using the shaft 23 as a fulcrum. It is designed to open and close in the direction in which the temperature decreases. -Also, the operating frame 9, which is movably disposed at the lower end of the interlocking body 8 with a shaft 16 as a fulcrum, is usually provided with a fire extinguishing lock lever 15 so as to be in contact with or inserted therethrough, and to be interlocked with the operating frame 9. Normal fire extinguishing lock lever 15 is shaft 16
It is configured to be movable up and down via the handle, 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 on or near the surface of the combustion tube 6 maintains the temperature T1 as shown in FIG. The combustion reaction slows down, the temperature at which the reaction occurs decreases, and the amount of combustion decreases.

Therefore, the temperature at or near the surface of the combustion tube 6 decreases as shown at T2. Here, this temperature change is used to deflect the bimetal 5 provided in contact with or in close proximity to the surface of the combustion tube 6, and the deflection force of the bimetal 5 is utilized to detect oxygen depletion as shown in Fig. 3. When the interlocking body 8, which has an inverted 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 inverted shape comes off from the locking part 13 and lowers due to the force of the spring 10 or its own weight. The anti-seismic automatic fire extinguishing device 7 is activated via an operating frame 9 provided at the lower end of the fire extinguisher 8 to extinguish the fire.

Here, when the temperature is rising, even if the one-way opening B412 provided at the tip of the bimetal 5 hits the interlocking body 8, the door 1
2 opens and the interlocking body 8 can be climbed over without difficulty.

Firstly, 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 attached via a shaft 16, which is movable when the operating knob 17 is raised in the extinguishing direction.During normal extinguishing, when the operating knob 17 is pushed up, the normal fire extinguishing lock lever 15 is activated. 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! ! ! 7 can be locked so that it cannot be activated.

Further, a dry firing lock knob 18 is provided at the lower part of the interlocking body 8, and when 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 firing lock knob 18 is set through the operating frame 9. During dry firing, the interlocking body 8 is pushed up, and even if the temperature drops, the anti-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 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, during normal fire extinguishing, simply raising the operating knob in the extinguishing direction causes the operating frame to push up the interlocking body and automatically lock the fire extinguishing system in the event of oxygen deficiency, and the fire extinguishing system in the event of oxygen deficiency does not operate during normal fire 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 sectional side view of a main part of a safety device for an open type combustor according to an embodiment of the present invention, and FIG. 2 is a side sectional 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... Anti-earthquake automatic fire extinguishing system. 8... Interlocking body, 9... Operating frame, 13... Locking part, 18... Dry firing lock knob.

Claims (1)

[Claims] Thermal deformation occurs when the core guide tube (2) that guides the core (1) and the combustion tube (6) placed on the core outer tube (3) are in contact with or close to each other and are displaced by sensing temperature changes during indoor oxygen deficiency. An element (5) is provided, and the upper end is inverted L through an operating frame (9) that operates an anti-seismic automatic fire extinguishing device (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 deformation element (5). , an operating frame (for pushing up the interlocking body (8) and locking it in the locking part (13));
9) is disposed at the bottom of the interlocking body (8), and a dry-firing lock knob (18) that pushes up and fixes the operating frame (9) toward the interlocking body (8) during dry-firing is attached to the operating frame (8). 9) A safety device for an open type combustor, characterized by being provided at the bottom of the combustor.