JPS63267830A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To make it possible to give warning or perform fire extinguishment under oxygen deficiency and to lock the operating of an oxygen deficiency detector at the time of normal fire-extinguishing 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 normal fire-extinguishing lock lever moving an operating frame engaging an interlocking member with an engaging part. CONSTITUTION:When an oxygen deficient state is started, the temperature within an inner flame cylinder 25 of a combustion cylinder 4 or between an outer flame cylinder and an outer cylinder 27 thereof lowers. This displaces a bimetal 5 provided within the inner flame cylinder 25 (between an outer flame cylinder 26 and an outer cylinder 27). When an interlocking member 8 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 disposed at the lower end of the interlocking member 8 is actuated, and an alarm 29 is lit or sounds or fire is extinguished by a solenoid 30. At the normal fire-extinguishing time, when an operating knob 17 is pushed up, the interlocking member 8 is pushed up by a normal fire-extinguishing lock level 15 through a lock level 14. Therefore, an oxygen deficiency detector can be locked so that it cannot operate even when the temperature lowers at the time of normal fire extinguishing time.

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 Conventional 1 For example, since open type combustors such as kerosene stoves are open indoors, the oxygen concentration in the room may decrease due to combustion exhaust gas, leading to a danger 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, there is an oxygen deficiency detection sensor installed on the exterior above the combustion cylinder, for example, 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 from 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 heat deformable element that senses temperature changes during indoor oxygen depletion and displaces in the core guide tube that guides the core and the combustion tube that is placed on the core outer tube. An interlocking body that operates a switch connected to a solenoid or an alarm in response to the heat deformable element is provided, and a locking part for locking the interlocking body is provided near the heat deformable element, When the anti-seismic automatic fire extinguishing system is set.

An operating frame for pushing the interlocking body upward and locking it in the locking portion is disposed below the interlocking body, and a normal fire extinguishing lock lever having an operating knob is interlocked with the operation frame so as to move the operating frame. It is assumed that it has been established.

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 inside of the combustion cylinder). The deflection force moves the interlocking body that is linked to the switch, activating the switch and lighting or sounding the first 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 will open freely in the direction in which the bimetal shifts due to temperature rise, but will not open in the opposite direction. By providing it at the tip of the bimetal, the one-way swing door opens even when the bimetal hits the interlocking body during the temperature rise at the beginning of ignition, and the bimetal can 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 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.

In addition, a normal fire extinguishing lock lever is provided that is linked to the operating knob used to lower the wick during normal fire extinguishing, and this allows oxygen deficiency to be detected by pushing up and fixing the interlocking body via the operating frame and lock lever. Lock the device. 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 lever, and the oxygen deficiency detection device is locked. Also, when the wick is raised by the operating knob for normal combustion, this normal extinguishing lock lever rotates, the lock on the oxygen deficiency detection device is released, 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 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.

Inside the inner flame tube 25 of the combustion tube 4 or between the outer flame tube 26 and the outer tube 27, a thermal deformation element 5 (here, explained using a bimetal) is connected to a switch 6 and an interlocking body 8. It is provided so that it touches one end. This interlocking body 8 is provided with a spring 10 that urges downward and compresses it (the same effect can be obtained even with its own weight), and the force of this spring 10 is applied to the interlocking body 8.
It works to push down the A switch 6 is provided at the lower end of the interlocking body 8 via an operating frame 9.

A power source 28 and an alarm 29 or solenoid 30 are provided directly connected to the switch 6.

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.

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 with the shaft 23 as a fulcrum, this door 12 can be freely opened in the direction of deviation when the temperature rises. It is designed to open and close in the direction where the temperature decreases.

Further, a lock lever 14 is provided at the lower end of the interlocking body 8 via an operating frame 9, and a normal fire extinguishing lock lever 15 is provided at the other end of this lock lever 14. It is configured to rotate 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 lock lever 14 provided at the lower end of the interlocking body 8.

The dry firing lock knob 18 is provided with a shaft that is guided as a fulcrum 20 in a slit 21 formed in the dry firing lock guide 19.

In addition, the dry firing lock knob 18 is pushed back by a normal fire extinguishing lock lever 15 which is interlocked with the operation knob 17, and the dry firing lock knob 18 is automatically released from the set.

The operation of the above configuration will be explained next.

During steady combustion, the temperature inside the inner flame tube 25 of the combustion tube 4 or between the outer flame tube 26 and the outer tube 27 maintains a temperature of T□ as shown in FIG. 2, but the temperature enters an oxygen-deficient state. Then, due to the lack of oxygen in the combustion air, the combustion reaction near the tip of the wick 1 slows down, the reaction temperature decreases, and the amount of combustion decreases.

Therefore, the temperature within the inner flame tube 25 of the combustion tube 4 or between the outer flame tube 26 and the outer tube 27 decreases as shown at T2.

Here, by utilizing this temperature change, the inner flame tube 25 of the combustion tube 4 is
The bimetal 5 provided inside (between the outer flame tube 26 and the outer tube 27) is deflected and the deflection force of the bimetal 5 is used to prevent 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 due to the force of the spring 10 or its own weight. The switch 6 provided at the lower end of the interlocking body 8 is activated, and the alarm 29 lights up or sounds, or the 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 system in case of oxygen deficiency, when the interlocking body 8 is pushed up by the lock lever 14, the reversely shaped tip of the interlocking body 8 is automatically moved by the rotational force of the compressing spring 10. It can be rotated in the direction of the locking part 13 and set in the locking part 13.

Further, a lock lever 14 is provided at the lower part of the interlocking body 8, and a fire extinguishing lock lever 15 is normally attached to the other end of the lock lever 14 through a shaft 16 so as to rotate when the operating knob 17 is raised in the extinguishing direction. When normally extinguishing a fire, when the operation knob 17 is pushed up, the 1 normal fire extinguishing lock lever 1 is
5, the interlocking body 8 is pushed up via the lock lever 14.

Even if the temperature drops during normal fire extinguishing, the oxygen deficiency detection device can be locked to prevent it from operating.

Further, a lock lever 14 is provided at the lower part of the interlocking body 8, and a dry firing lock knob 18 provided at the other end of the lock lever 14 is used to move the lock lever 14 in the direction of the arrow through the slit 21 of the dry firing lock guide 19. If you set it along the
Even if the interlocking body 8 is pushed up via the lock lever 14 and the temperature drops during dry firing, the oxygen deficiency detection device cannot be activated, and complete dry firing can be performed.

In addition, even if you forget to release the dry firing lock knob 18 after dry firing is completed, if you lower the wick 1 with the operating knob 17, the normal fire extinguishing lock lever 15 linked to this will move around the shaft 16 as a fulcrum. By rotating in the direction of the arrow, the set dry firing lock knob 18 can be pushed back and automatically removed.

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.

Furthermore, even when igniting, 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, when setting the fire extinguishing system in case of oxygen deficiency, the interlocking body should be set with a lock lever.
By simply pushing up the interlocking body, the reversely shaped tip of the interlocking body can be automatically rotated toward the locking part by the rotational force of the spring and set in the locking part.

In addition, when normally extinguishing a fire, simply raising the operating knob in the direction of extinguishing will cause the lock lever to push up the interlocking body and automatically lock the oxygen deficiency detection device, so that the oxygen deficiency detection device will not operate during normal fire extinguishment.

Furthermore, when dry firing the core, by setting the dry firing lock knob, the lock lever pushes up the interlocking body, fixing the oxygen deficiency detection device and making it inoperable, thereby allowing complete dry firing.

If you forget to release the dry firing lock knob, use the operation knob 1.
By lowering the wick with 7, the dry firing lock knob can be automatically released using the normal fire extinguishing lock lever, which is useful.

[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. 1... Core, 2... Core guide tube, 3... Core outer tube, 4... Combustion tube, 5... Heat deformable element,
6...Switch, 8...Interlocking body, 13...
Locking part, 15...Normal fire extinguishing lock lever-0 17...Operation knob, 29...Alarm, 3o...
solenoid.

Claims (1)

[Claims] A heat deformable element (5) that senses temperature changes during indoor oxygen depletion and displaces inside the combustion tube (4) placed on the core guide tube (2) that guides the core (1) and the core outer tube (3). is provided, and the heat deformable element (
An interlocking body (8) having an L-shaped upper end is provided to operate a switch (6) connected to a solenoid (30) or an alarm (29) in response to the alarm (5).
) in the safety device for an open type combustor, which has a locking part (13) for locking the heat deformable element (5), when the anti-seismic automatic fire extinguishing device (7) is set, the interlocking body An operating frame (9) that pushes up the operating frame (8) and locks it to the locking portion (13) is disposed below the interlocking body (8). 9) A safety device for an open type combustor, characterized in that a normal fire extinguishing lock lever (15) having an operation knob (17) is provided in conjunction with the fire extinguishing lock lever (15).