JPH0120531Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a safety device for a kerosene stove that safely extinguishes the kerosene stove when there is a lack of oxygen indoors.

Conventional technology Conventional kerosene heaters are open indoors, so the combustion exhaust gas can reduce the oxygen concentration indoors, leading to a danger of oxygen deficiency. As a safety device, a proposal has been filed as in Japanese Patent Laid-Open No. 58-99620, in which a sensor detects oxygen deficiency and uses an electric circuit to determine whether to issue an alarm or extinguish the fire. In such cases, a heat deformation 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, the upper part of the core guide cylinder), and the deformation force of the heat deformation element is used to control the temperature in an earthquake-resistant automatic fire extinguishing system. By moving the interlocking rod linked to the fire extinguisher, the spring force attached to the interlocking rod (the same effect can be achieved with a weight) activates the earthquake-resistant automatic fire extinguishing system and extinguishes the fire.

Problems to be Solved by the Invention In the above configuration, when dry firing the core, the temperature of the detection part where the heat deformable element is installed gradually decreases as the dry firing ends, similar to when there is oxygen deficiency. The fire extinguisher will work and automatically extinguish the fire. Therefore, since dry firing of the wick cannot be completed completely, a dry firing lock knob is used to lock the core in case of oxygen deficiency during dry firing, but if you forget to release this lock, the oxygen deficiency extinguishing system will be activated. There was a problem that I was told could not be done.

Measures to solve the problem A dry firing lock knob is provided to lock the interlocking rod that activates the earthquake-resistant automatic fire extinguishing system, and the dry firing lock knob is linked to a fire extinguishing knob that lowers the wick during normal extinguishing to release the dry firing lock knob. Usually equipped with a fire extinguishing lock bar.

Function During dry firing, the dry firing lock knob is set, but after dry firing, when lowering the wick with the extinguishing knob, the normal extinguishing lock bar that is linked to the extinguishing knob
The fire extinguisher can now be activated by pushing and releasing the dry fire lock knob.

Example An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of a kerosene stove according to the present invention. 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 is provided near the upper end of the core guide cylinder 2.
(Here, a bimetal will be described) is provided so as to be in contact with one end of an interlocking rod 8 which is interlocked with the earthquake-resistant automatic fire extinguishing device 7. This interlocking rod 8 is provided with a compression spring 10 (the same effect can be achieved with a weight), and this force acts to push down the interlocking rod 8. A lock lever 1 is attached to the lower end of the interlocking rod 8.
4 is provided, and the other end of this lock lever 14 is provided with a dry lock knob 18. This dry firing lock knob 18 is guided around a fulcrum 20 of a slit 21 of a dry firing lock guide 19.
Further, the dry firing lock knob 18 is configured to be pushed around by a normal fire extinguishing lock bar 15 which is interlocked with the fire extinguishing knob 17 to be released from the set position.

In the above configuration, during steady combustion, the temperature near the top surface of the core guide cylinder 2 is as shown in Figure 2.
Although the temperature of T ₁ is maintained, if the oxygen starvation state occurs, there will be a lack of air for combustion, and the combustion reaction near the tip of wick 1 will slow down, causing the reaction temperature to drop. Therefore, the temperature near the core guide tube 2 and the core outer tube 3 decreases as shown at _T2 . Here, the bimetal 5 provided on the top surface of the core guide tube 2 is deflected by utilizing this temperature change, and the deflection force of the bimetal 5 is utilized. When the inverted L-shaped interlocking rod 8 is rotated in the direction of the arrow by the biasing force of the bimetal 5, the inverted L-shaped interlocking rod 8 engages the locking portion 13.
It comes off and is pushed down by the force of the compression spring 10.

Therefore, the earthquake-resistant automatic fire extinguishing device 7, which is in contact with the other end of the interlocking rod 8, is activated by being pushed down by the lever 9, and the wick 1 suddenly descends to extinguish the fire. A lock lever 14 is provided at the bottom of the interlocking rod 8, and the lock lever 14 is set along the slit 21 of the dry lock guide 19 in the direction of the arrow using a dry lock knob 18 provided at the other end of the lock lever 14. Then, the interlocking rod 8 is pushed up via the lock lever 14, and the oxygen-deficient fire extinguishing device does not work during dry firing, allowing complete dry firing. After the dry firing is completed, turn off the fire extinguishing knob 17.
When the wick is lowered, the normal fire extinguishing lock bar 15 that is interlocked with this rotates in the direction of the arrow with the shaft 16 as a fulcrum.
Push and turn the dry firing lock knob 18 that was set.

Effects of the invention As described above, according to the invention, when a kerosene heater is in use, the interlocking rod can be removed from the locking part due to the deviation of the bimetal in an indoor oxygen-deficient condition that is considered to be dangerous, and the compression spring installed on the interlocking rod can be activated. The earthquake-resistant automatic fire extinguishing system can be operated by force, and when the wick is dry-fired,
By setting the dry fire lock knob, the oxygen deficient fire extinguishing system is locked, and even if you forget to release the dry fire lock knob, by lowering the wick with the fire extinguishing knob, the dry fire lock knob can be automatically released using the normal fire extinguishing lock bar. It is beneficial.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the essential parts of a safety device for a kerosene stove according to an embodiment of the present invention, Fig. 2 is a temperature characteristic diagram of the top surface of the wick guide tube during oxygen deficiency, and Fig. 3 is an embodiment of the present invention. FIG. 1 is a perspective view of a main part of a safety device for a kerosene stove according to an embodiment. 7...Seismic automatic fire extinguishing system, 8...Interlocking rod, 14
... Lock lever, 18 ... Air-fired lock knob,
15... Normal fire extinguishing lock bar, 17... Fire extinguishing knob.

Claims (1)

[Scope of utility model registration request] In a double-tube oil stove that uses a wick to evaporate and burn liquid fuel, a heat deformation element 5 installed near the wick guide tube 2 and core outer tube 3 detects a temperature drop during indoor oxygen depletion, and Using the deformation force of the deformation element 5, the interlocking rod 8 that is interlocked with the earthquake-resistant automatic fire extinguishing system 7 is moved, and the earthquake-resistant automatic fire extinguishing system 7 that is interlocked with the interlocking rod 8 is activated by the spring 10 provided on the interlocking rod 8. In a safety device for a kerosene stove that extinguishes the fire in the event of lack of oxygen, a dry fire lock knob 18 is provided to lock the interlocking rod 8 that activates the seismic automatic fire extinguishing device 7, and the wick is turned off during normal extinguishing by releasing the dry fire lock knob 18. This safety device for a kerosene stove is characterized by being provided with a normal fire extinguishing lock bar 15 that is linked with a fire extinguishing knob 17 that is lowered.