JPS63267828A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To give warning or conduct fire-extinguishing under oxygen deficiency and to prevent a fire extinguisher from operating at the time of no-fuel burning of wick by providing at a specific position a thermal deformation element sensing a temperature fluctuation under oxygen deficiency and changing its position, and also providing a no-fuel burning locking knob which pushes up to fix an operating frame to the side of an interlocking member at the lower part of the operating frame. CONSTITUTION:When indoor air becomes oxygen deficient, the temperature on the outer surface or in the vicinity of a combustion cylinder 4 lowers. This displaces a bimetal 5 pro vided in contact with or in close vicinity to the outer surface of the combustion cylinder 4. When an interlocking member 8 having an inverted 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, a switch 6 provided at the lower end of the interlocking member 8 is actuated and an alarm 25 is lit or rung or fire is extinguished by a solenoid 30. Further, when no-load burning 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 a no-fuel burning lock guide 19, the interlocking member 8 is pushed up through the operating frame 9. Therefore at the time of no-load burning, even when the temperature lowers, an automatic aseismatic fire extinguisher 7 cannot operate, and complete no-fuel burning can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a safety device for an open type combustor that uses an alarm to issue a warning in the event of abnormal combustion such as when there is a lack of oxygen in the room.

Conventional technology Conventionally, open-type combustors such as kerosene stoves are open indoors, so the combustion exhaust gas reduces 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 an open type combustor such as a kerosene stove, 1. For example, there is an oxygen deficiency detection sensor installed on the exterior of the upper part of the combustion tube, as disclosed in Japanese Patent Application Laid-Open No. 58-99620. A device has been disclosed that detects oxygen deficiency and uses a control circuit that operates alarm means or combustion stop means to make a judgment based on the output of the oxygen deficiency detection sensor to issue an alarm or 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, there is a problem in that it cannot properly detect the temperature of the flame during oxygen deficiency abnormal combustion.

On the other hand, when a normal fire is extinguished, the temperature of the detection part equipped with a heat deformable element gradually decreases while the fire is completely extinguished, just as in the case of oxygen deficiency. However, there were problems such as the oxygen deficiency alarm lighting up or sounding, or the solenoid extinguishing the fire.

In addition, when the core is dry-fired, the temperature of the detection part equipped with a heat deformable element gradually decreases until the dry-firing is completely completed, as in the case of oxygen deficiency, and the oxygen deficiency alarm lights or sounds, or the solenoid is activated. There was a problem with extinguishing the fire.

Means for Solving the Problems The present invention provides a core guide tube for guiding the core, and a heat deformable element disposed in contact with or near the outside of the combustion tube placed on the core outer tube, which is displaced by sensing a temperature change during indoor oxygen deficiency. and an interlocking body that operates a switch connected to a solenoid or an alarm in response to the heat deformation element, and a locking part for locking the interlocking body is provided near the heat deformation element. In this method, an operating frame that pushes up the interlocking body and locks it in the locking part is disposed at the bottom of the interlocking body, and furthermore, during dry firing, the operating frame is pushed up toward the interlocking body and fixed. A lock knob is provided at the bottom of the operating frame.

In the case of a lack of working oxygen, a heat deformable element (e.g. bimetal, etc.) is used to adjust the temperature at a place where the temperature changes significantly compared to the temperature during normal combustion (for example, near the outside of the combustion cylinder). The deflection force moves the interlocking body that is linked to the switch, activating the switch and lighting or sounding an alarm when oxygen is deficient.

That is, the interlocking body is removed from the locking part by the deflection force of the bimetal, the switch is turned on by the spring force, and the alarm is turned on or sounds, or the fire is extinguished by the solenoid.

Also, here, since the structure is such that the interlocking body moves while the temperature is decreasing due to the heat deformation element, the heat deformation element does not hit the interlocking body even when the temperature is rising, such as during ignition. , the tip of the bimetal was bent 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.

In other words, by providing a one-way swing door at the tip of the bimetal, the one-way swing door opens even when the bimetal hits the interlocking body, even during the temperature rise at the initial stage of ignition.

Bimetals can smoothly overcome interlocking bodies.

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 toward the locking part, and a rotational force is applied to this spring in the direction of the locking part. By providing this, the interlocking body can be rotated in the direction of the locking portion and set in the locking portion simply by pushing up the interlocking body.

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 downward.
Lock the oxygen deficiency detection device. That is, when dry-firing the core, if the dry-firing lock knob is set along the inclined surface of the dry-firing lock guide, the interlocking body cannot move downward and the oxygen deficiency detection device is locked.

Further, when the dry firing is completed, the interlocking body becomes free by removing the set of the dry firing lock knob, and the oxygen deficiency detection device 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 draws up liquid fuel from the 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. A combustion tube 4 is provided at the upper end of the core guide tube 2 and the core outer tube 3.

A heat deformable element 5 (
(Here, a bimetal will be used for explanation) is provided so as to be in contact with one end of an interlocking body 8 which is interlocked with the switch 6. This interlocking body 8 has a spring 1 that urges downward and compresses it.
0 (the same effect can be obtained with its own weight), and this force acts to push down the interlocking body 8. A switch 6 is provided at the lower end of the interlocking body 8 via an operating frame 9. Directly connected to this switch 6, power supply 24 and alarm 2
5 or solenoid 30 is provided.

The tip of the interlocking body 8 has an inverted shape so that it is set in the locking portion 13 when the oxygen deficiency detection device is set. 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, 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 with the shaft 23 as a fulcrum, this door 12 opens freely in the direction of deviation when the temperature rises. On the other hand, it is 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 as to be in contact with each other or to be interlocked by means of a device,
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, and this dry firing lock knob 1
Reference numeral 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 outside surface of the combustion tube 4 maintains a temperature of T, as shown in Figure 2. However, when an oxygen-deficient state occurs, the wick dies due to the lack of oxygen in the combustion air. 1
The combustion reaction near the tip slows down, the reaction temperature drops, and the amount of combustion decreases.

Therefore, the temperature on or near the outside surface of the combustion tube 4 decreases as shown at T2. Here, this temperature change is used to deflect the bimetal 5 provided in contact with or near the outer surface of the combustion tube 4, and the deflection force of the bimetal 5 is utilized to generate oxygen deficiency, as shown in Fig. 3. When the interlocking body 8 having 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 is detached from the locking part 13 and lowered by the force of the spring 10 or by its own weight, and the interlocking body 8 A switch 6 provided at the lower end of the switch is activated, and an alarm 25 lights up or sounds, or a solenoid 30 extinguishes 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
Since it opens, it is possible to get over the interlocking body 8 without difficulty.

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, and a fire extinguishing lock lever 15 is normally attached to the shaft 1 at the other end of the operating frame 9.
When the operating knob 17 is raised in the extinguishing direction through the extinguishing mechanism 6, the interlocking body 8 is moved upwardly by the extinguishing lock lever 15. The oxygen deficiency detection device 7 can be locked so that it cannot operate even if the temperature drops during normal extinguishing.

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,
Even if the interlocking body 8 is pushed up via the operating frame 9 and the temperature drops during dry firing, 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. A switch is actuated by the force of a spring installed in the body, and an alarm or solenoid can be used to quickly warn of oxygen deficiency or extinguish the fire.

Also, even during one ignition, the bimetal is not bent by the interlocking body, and the interlocking body can be smoothly passed through the one-way opening door. In addition, to set the fire extinguisher 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. Can be set.

In addition, 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 oxygen deficiency detection device will not operate during normal fire extinguishment.

Also, when the wick is dry fired, by setting the dry firing 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, allowing for complete dry firing. etc. are useful.

[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. 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. 1... Core, 2... Core guide tube. 3... Core outer cylinder, 4... Combustion cylinder. 5... Heat deformation element, 8... Interlocking body, 13... Locking part, 18... Blank lock knob, 25... Alarm, 30... Solenoid.

Claims (1)

[Claims] Heat that is displaced when it comes into contact with or near the outside of the wick guide tube (2) that guides the wick (1) and the combustion tube (4) placed on the core outer tube (3) and senses the temperature change during indoor oxygen deficiency. A deformation element (5) is provided, and a solenoid (
30) or an interlocking body (8) with an L-shaped upper end that operates a switch (6) connected to an alarm (25)
In a safety device for an open type combustor, the interlocking body (8) is provided with a locking part (13) that locks the interlocking body (8) in the vicinity of the heat deformable element (5). Push the locking part (
An operating frame (9) that is engaged with the interlocking body (13) is disposed at the bottom of the interlocking body (8), and furthermore, the operating frame (9) is engaged with the interlocking body (8) during dry firing.
8) Dry firing lock knob (18) that is pushed up to the side and fixed.
A safety device for an open type combustor, characterized in that: is provided at the lower part of the operating frame (9).