JPS63267827A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To make it possible to give warning or conduct fire extinguishment under oxygen deficiency and to lock an oxygen deficiency detector at the time of normal fire-extinguishment by providing at a specific position a thermal deformation element sensing the temperature fluctuation under oxygen deficiency and changing its position, and also providing a normal fire-extinguishing lock lever for moving an operating frame engaging an interlocking member with an engaging part. CONSTITUTION:When indoor air becomes oxygen deficient, the temperature on the outer surface of a combustion cylinder 4 or in the vicinity thereof lowers. This displaces a bimetal 5 disposed 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 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. 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, at the time of normal fire extinguishing, even when the temperature lowers, an oxygen deficiency detector 7 can be locked 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 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 can reduce the oxygen concentration in the room, creating a danger of oxygen deficiency. According to the Japanese Patent Application Laid-Open No. 58-1999, the safety device for abnormal combustion due to lack of oxygen in open type combustors such as kerosene stoves is
As disclosed in Publication No. 99620, 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.

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. When the anti-seismic automatic fire extinguishing system is set, an operating frame is disposed below the interlocking body to push the interlocking body upward and engage the locking portion, and the operating frame is moved so as to move the interlocking body. A normal fire extinguishing lock lever with an operating knob is provided at one end.

When a state of oxygen deficiency occurs, a heat deformable element (such as a bimetallic material) is used to adjust the temperature at a location where the temperature changes significantly compared to the temperature during normal combustion (for example, near the outside of the combustion cylinder). The biasing force of the bimetal moves the interlocking body interlocking with the switch, activating the switch, and lighting or sounding the alarm in the event of oxygen deficiency.In other words, the bimetal's deflection force disengages the interlocking body from the locking part, and the spring force Turn on the switch, light or sound the alarm, or use the solenoid to extinguish the fire.

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. By providing it at the end of the door, the one-way swing door opens even when the bimetal hits the interlocking body during the temperature rise at the initial stage of ignition, and the bimetal can smoothly overcome 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 deficiency extinguishing lock lever is provided that is linked to this, which locks the oxygen deficiency detection device by pushing up and fixing the interlocking body through the operating frame. do. In other words, when normally extinguishing, by moving the operating knob that lowers the wick in the extinguishing direction, the interlocking body cannot be moved downward by the normal extinguishing lock lever that is interlocked with this operating frame, and the oxygen deficiency detection device is locked.

When the wick is raised by the operating knob for normal combustion, the fire extinguishing lock lever rotates, the oxygen deficiency detection device is unlocked, the interlocking body becomes free, and the oxygen deficiency detection device can 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 4 is provided at the upper end of the cylinder.

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, 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 so that it opens freely and closes in the direction where 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.
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 in the dry firing rotor 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 temperature of the wick 1 increases due to the lack of oxygen in the combustion air. 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 its own weight. A switch 6 provided at the lower end of the switch is activated, causing an alarm 25 to light up or sound, or a solenoid 30 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
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 1o,
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 provided via a shaft 16 so as to be movable when the operating knob 17 is raised in the extinguishing direction. The interlocking body 8 is pushed up via the operating frame 9 by the lock lever 15, and can be locked so that the oxygen deficiency detection device 7 cannot be operated 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.

Further, even when igniting, the bimetal is not bent by the interlocking body, and the interlocking body can be smoothly overcome by the one-way 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 and set into the locking part. can do.

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

In addition, by setting the dry firing lock knob when dry burning the wick, 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 and completely dry burning. It is a useful thing that can be done.

[Brief explanation of the drawing]

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. DESCRIPTION OF SYMBOLS 1... Core, 2... Core guide tube, 3... Core outer tube, 4... Combustion tube, 5... Heat deformation element, 8...
- Interlocking body, 13...Locking part, 15...Normal fire extinguishing lock lever 117...Operation knob, 25...Alarm device, 30...Solenoid.

Claims (1)

[Claims] Heat that is displaced when it comes into contact with or near the outside of the wick guide cylinder (2) that guides the wick (1) and the combustion cylinder (4) placed on the core outer cylinder (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 the safety device for an open type combustor, the seismic automatic fire extinguishing device ( 7) When setting, 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). ) has an operating knob (17) at one end of the operating frame (9) to move the normal fire extinguishing lock lever (15).
) A safety device for an open type combustor.