JPS63267829A - Safety device for open type burner - Google Patents

Abstract

PURPOSE:To give warning or perform fire extinguishment and to prevent a thermal deformation element from deforming under oxygen deficiency by providing at a specific position the thermal deformation element sensing a temperature fluctuation under oxygen deficiency and changing its position, and also providing a one-way opening door at the tip end of the thermal deformation element. CONSTITUTION:When an oxygen deficient state is started within an inner flame cylin der 25 of a combustion cylinder 6 or between an outer flame cylinder 26 and an outer cylinder 27 thereof the temperature thereof lowers. As a result, a bimetal 5 provided in the inner flame cylinder 25 (between the outer flame cylinder 26 and the outer cylinder 27) is displaced. When an interlocking member 8 having an inverted L-shaped tip end is rotated in the direction indicated by arrow is rotated by utilizing this dis placement 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 29 is lit or rung or fire is extinguished by a sole noid 30. In this case, while the temperature is rising, an one-way opening door 12, provided at the tip end of the bimetal 5 is freely opened in the direction of displace ment at the time of the temperature rise, but conversely, is closed in the direction of the temperature fall, and easily clears the interlocking member 8. Therefore, the deformation of the bimetal 5 can be prevented.

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. As shown in the figure, there is one safety device for abnormal combustion due to lack of oxygen in an open type combustor such as a kerosene stove.For example, there is an oxygen deficiency detection sensor installed on the exterior above the combustion tube as 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, A one-way opening door is provided at the tip of the heat deformable element to overcome the deflection direction when the temperature rises and to push the interlocking body when the temperature falls.

When a state of oxygen deficiency occurs, a heat deformation element (e.g. bimetallic material, etc.) is used to adjust the temperature at a location (for example, near the inside of the combustion cylinder) where the temperature changes significantly compared to the temperature during normal combustion. The deflection force moves the interlocking body that is linked to the switch, activating the switch and lighting or sounding the alarm in the event of oxygen deficiency. 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, it is a one-way opening door. By providing this 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 initial stage 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 in the direction of the locking part, and a rotational force in the direction of the locking part is applied to this spring. In addition, by simply pushing up the interlocking body, the interlocking body rotates toward the locking portion and can be set in the locking portion.

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 is an interlocking body 8 in which a thermal deformation element 5 (here, explained using a bimetal) is interlocked with a switch 6.
It is provided so that it is in contact with one end of the. This interlocking body 8 is provided with a spring 10 that urges and compresses it downward (the same effect can be obtained even with its own weight), and the force of this spring 10 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.

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 1o 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 812 is provided at the tip of the bimetal 5 that contacts 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.

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, and this dry firing lock knob 18 is inserted into a slit 21 formed in the dry firing lock guide 19 as a fulcrum 20. A guided axis is provided.

In addition, the dry firing lock knob 18 is pushed back by a normal fire extinguishing lock lever 15 which is interlocked with the operating 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 the temperature T1 as shown in FIG. Due to the lack of oxygen in the combustion air, the combustion reaction near the tip of the wick 1 is slowed down, the temperature at which the 1 reaction occurs is lowered, and the amount of combustion is reduced.

Therefore, 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 decreases as shown at T3.

Here, by utilizing this temperature change, the inner flame tube 25 of the combustion tube 4 is
By deflecting the bimetal 5 provided inside (between the outer flame tube 26 and the outer tube 27) and utilizing the deflection force of this bimetal 5, when oxygen is depleted, the tip will have an inverted shape as shown in Fig. 3. When the interlocking body 8 having the above-mentioned structure is rotated in the direction of the arrow by the deflection force of the bimetal 5, the inverted interlocking body 8 is detached from the locking part 13 and lowered by the force of the spring 10 or its own weight. The switch 6 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, l11
2 opens, the user can easily get over the interlocking body 8.

Next, when setting up the agricultural 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 turned off 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 normal fire extinguishing lock lever 1 is activated.
5, the interlocking body 8 is pushed up via the lock lever 14, and the oxygen deficiency detection device can be locked so that it cannot operate even if the temperature drops during normal extinguishing.

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 the dry firing is completed, if you lower the wick 1 with the operation knob 17, the normal fire extinguishing lock lever 15 linked to this will move in the direction of the arrow with the shaft 16 as the fulcrum. The dry firing lock knob 18 that was set 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 extinguishing direction causes the operating frame to push up the interlocking body and automatically lock the oxygen deficiency detection device;

Also, when dry firing the core, by setting the dry firing lock knob, the lock lever pushes up the interlocking body and fixes the oxygen deficiency detection device, making it impossible to operate, 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 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. DESCRIPTION OF SYMBOLS 1... Core, 2... Core guide tube, 3... Core outer tube, 4... Combustion tube, 5... Heat deformation element, 6...
- Switch, 8... Interlocking body, 11... Tip of heat deformable element, 12... Door, 13... Locking part, 29... Alarm, 30... 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, in which a locking part (13) for locking the heat deformable element (5) is provided in the vicinity of the heat deformable element (5). Interlocking body when rising (8)
A safety device for an open type combustor, characterized in that it is provided with a one-way opening door (12) that pushes the interlocking body (8) when the temperature drops.