JPS6220445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil combustor that uses a lamp wick of an kerosene stove or the like as a means of vaporizing fuel, and an object of the present invention is to provide a safe oil combustor that extinguishes the fire in a short time when it falls over and has little risk of fire. With the goal.

Oil burners that use lamp wicks as a means of vaporization can be used as household heaters such as portable oil stoves because they have many advantages, such as requiring no power source, being small and lightweight, making them easy to move, less likely to break down, and being inexpensive. is the mainstream. However, the equipment has an oil tank that stores flammable fuel, and abnormal combustion may occur during earthquakes, vibrations such as contact, shock, or falling, and the oil in the tank or leaked oil may ignite, creating a fire hazard. Because of this, a device is added that automatically extinguishes the fire if a certain amount of vibration is applied or if it falls over. Conventionally, the following two methods have been used as fire extinguishing means.

(1) Shutter method This method detects vibrations based on the amount of movement of the shutter, and during normal use, the shutter, which is stored in a spring or the like and held by the hook, is released from the hook by moving the shutter. This is a method of extinguishing fires by suffocating them by blocking the air flow with a shutter above the wick.

(2) Wick lowering method This method detects vibrations based on the amount of movement of the heavy hanger, and during normal use, the wick, which is stored with a spring or the like and held by the hook, is held by the hook by moving the heavy hanger. This is a method of extinguishing the fire by suffocation by releasing the lamp and lowering the wick into the wick storage area formed by the gap between the wick guide and the wick outer cylinder.

However, in the shutter method (1) The structure of the moving parts is complicated and the cost is high.

(2) Unreliable fire extinguishing due to air leaks.

(3) The capacity of the shutter housing is large.

In addition, in the core lowering method, (1) the extinguishing time is short in the normal position, but the extinguishing time is long when falling.

There were other drawbacks.

The present invention solves the above-mentioned drawbacks and extinguishes the fire in a short time both in the normal position and when falling.

By the way, the cause of the drawbacks in the core lowering method is due to the following phenomenon.

Under normal conditions, a heated combustion tube is placed above the vaporizing section, and residual vaporized gas generated when lowering the wick (a significant amount of heat accumulated due to the heat capacity of the wick and metal fittings) Normally, the extinguishment time is quick because the gas (gas from vaporized fuel impregnated in the lamp) is removed from near the wick in a short time by the draft generated by the combustion tube, but in the event of a fall, the combustion tube Due to the separation, there is less draft, the ability to remove residual gas decreases, and the extinguishing time increases because the residual gas ignites and burns.

Furthermore, it has been confirmed through experiments that when a vehicle falls over, a weak draft is generated from the bottom to the top, which serves as a combustion air source for the vaporization section and continues combustion in the vaporization section below.

The present invention cuts off the air source by using a fire extinguishing plate that moves in the falling direction to remove the remaining flame when the wick is extinguished.
The fire is completely extinguished in a short period of time.

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

In FIG. 1, reference numeral 1 denotes a cylindrical lamp wick made of heat-resistant fiber or the like, and although not shown in the figure, its lower end is immersed in fuel in a fuel tank located below. 2 is a cylindrical core guide tube, 3 is a cylindrical core outer tube, and the lamp wick 1 moves up and down in the gap between the core guide tube 2 and the core outer tube 3, and during combustion, the tip of the wick (vaporizing part) is exposed inside the combustion tube 4 between the outer flame tubes 4a and 4b, and is lowered into the gap when extinguishing a fire. The inner and outer flame tubes 4a and 4b each have a large number of small holes.

Reference numeral 5 denotes a fire extinguishing plate, which is prevented from detaching from the core guide tube 2 by a guide pin 6. During normal combustion, the fire extinguishing plate 5 is located concentrically above the wick guide tube and housed inside the combustion tube 5, as shown in FIGS. 2 and 3.

On the other hand, when falling, as shown in Figures 4 and 5,
The fire extinguishing plate 5 moves in the overturning direction due to its own weight, contacts the core outer cylinder 3, and stops.

Next, the action will be explained.

In FIG. 1, fuel is sucked up by the capillary action of the lamp wick 1 and reaches the tip (vaporization part) of the lamp wick 1. When it is ignited from the outside by an appropriate means, it is vaporized by the heat and the air flow supplied from the small hole in the combustion tube 4, and thereafter continues to vaporize by the heat of combustion.
Burns while mixing with air.

Next, when extinguishing a fire, there are two types of extinguishing operations. In the normal position, the tip of the wick 1 is lowered and stored in the gap between the wick guide tube 2 and the wick outer tube 3, cutting off the air flow to the vaporization section. However, when the fire is extinguished by falling, the combustion tube 4 separates from the wick guide tube 2 and the wick outer tube 3, and the wick 1 is inserted into the gap between the wick guide 2 and the wick outer tube 3, as shown in FIGS. 4 and 5. The lamp wick 1 is housed in the wick 1 to block the air flow to the tip (vaporizing part), and the temperature of the wick 1 is rapidly lowered to rapidly reduce vaporization. In addition, in this embodiment, by moving the fire extinguishing board 5 in the overturning direction, a semi-enclosed chamber formed by the core guide cylinder 2, the core outer cylinder 3, and the fire extinguishing board 5 is formed in the overturning direction part,
a wick guide tube 2 that serves as a combustion part for fuel gas that is vaporized by residual heat due to the heat capacity of the wick after the wick 1 has descended;
This prevents air from flowing into and out of the upper part of the outer core cylinder 3. Therefore, in the combustion section where the supply of air is blocked, oxygen necessary for combustion is no longer supplied, and combustion stops due to suffocation.

As described above, the present invention has the following features: (1) The fire extinguishing board itself has the ability to detect overturning, and no other overturning detection mechanism is required.

(2) Reliably works in areas where residual fires occur during falls.

(3) No adverse effects during normal combustion and normal extinguishing.

(4) Does not require storage space.

It has many features such as this, and can shorten the time it takes to extinguish a fire in the event of a fall, making it extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing one embodiment of the present invention;
Fig. 2 is a cross-sectional view of the main part during normal use, Fig. 3 is a plan view of the main part during normal use (cross-sectional view along the line a-a in Fig. 2),
FIG. 4 is a cross-sectional view of the main part when it falls over, and FIG. 5 is a side view of the main part when it falls over (cross-sectional view taken along line bb in FIG. 4). 1... Lamp wick, 2... Core guide tube, 3... Core outer tube,
4... Combustion cylinder, 5... Fire extinguishing board.

Claims (1)

[Claims] 1. A combustion chamber consisting of a porous inner flame tube and an outer flame tube, a vertically movable lamp wick, a mechanism for lowering the wick in the event of a fall, a wick guide tube inside the wick, and a wick outer tube provided on the outside. The oil combustor is provided with a fire extinguishing board on the top of the core guide cylinder that moves in the direction of the fall when it falls and suffocates and extinguishes residual flame.