JPS644108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device that is open to the atmosphere, and is aimed at reducing odor during extinguishing a fire.

Generally speaking, combustion devices that emit exhaust gas into a room have the problem that gas is generated before the fire is extinguished, and the odor suddenly becomes strong. In addition, this gas contains harmful components such as carbon monoxide and aldehydes, which poses a problem for health.

One possible solution to this problem is to use an ignition heater to burn the gas that is generated during extinguishing the fire, and experiments have shown that the results are almost satisfactory. In other words, even when extinguishing a fire, the heater provided for ignition is supplied with electricity for a certain period of time to generate heat, and the unused gas is combusted by the heater. It is conceivable to supply power to the ignition heater for a certain period of time after extinguishing the fire by using a timer, a temperature switch, etc., but in terms of cost etc., it is most advantageous to use a temperature switch.

However, when this temperature switch was used, there were problems such as a long power supply time and large variations. In other words, when this temperature switch is used, it detects the temperature of the combustion section or exhaust gas and cuts off the power supply to the ignition heater when this temperature falls below a certain level. Since the temperature is low, it takes a long time, and when detecting the exhaust gas temperature, it varies greatly depending on the atmospheric conditions.

The present invention solves these problems and makes it possible to prevent odors during fire extinguishing at low cost and stably.

One embodiment of the present invention will be described below using an example of a hot air blower.

In the figure, 1 is the main body, with a suction port 2 on the top,
It has an air outlet 3 at the bottom. A wind cylinder 4 forms a passage 5 between the suction port 2 and the blowout port 3, and a fan 7 is attached near the suction port via a radial arm 6 so as to face downward. Reference numeral 8 denotes a plate disposed below the fan 7, and a ventilation hole 9 is formed in the outer periphery of the plate. Reference numeral 10 denotes a combustion section located below the plate 8, which includes a lamp wick 12 that sucks up fuel from the tank 11.
and porous inner and outer flame cylinders 13, 13a for burning the fuel of the lamp wick 12, as well as an outer cylinder 14 surrounding the outer periphery thereof.
Furthermore, a combustion tube 15 is provided on the outer periphery of the outer cylinder 14 and extends to the vicinity of the plate 8. Reference numeral 16 denotes an operating lever for moving the lamp wick 12 up and down, and is adapted to be attracted and held by an electromagnet 17 when the lamp wick 12 is pushed up. Reference numeral 18 denotes an ignition heater as an example of an igniter, which is installed near the lamp wick 12 of the combustion section 10, and a temperature switch 19 is connected in parallel to its power supply circuit. As is clear from the drawing, this temperature switch 19 is provided in the passage near the air outlet 3.

Next, the operation will be explained using the circuit shown in FIG. First, the power plug 20 is connected to a power outlet, and then the operation lever 16 is pushed down, the operation switch 21 is switched from E-ro to I-H, and the power transformer 22 is energized. Therefore, a voltage is generated in the low voltage circuit, and the capacitor 23 starts to be charged. However, since the electric charge is not sufficiently charged at the beginning, the potential connected to the input of the comparator 24 is lower than the input. The output becomes Hi, the transistor 25 is turned on, the relay 26 is energized, and the switching contact 26a is switched from knee to knee. Therefore, the ignition heater 18 is energized via the contact knee. At this time, since the lamp wick 12 is pushed upward by the lever 16, the lamp wick 12 is ignited and combustion begins. Further, at the same time as the operation switch 21 is turned on, the fan 7 is also energized, the fan 7 rotates, and air is blown downward along the wind cylinder. At this time, due to the ejector effect of the air blown out, the exhaust gas is sucked in as shown by the broken line, mixes with the air from the fan 7, and is blown out from the outlet 3 as warm air. Combustion air will be forcibly sucked and supplied.

Then, the capacitor 23 is sufficiently charged,
When the potential of the input of the comparator 24 becomes higher than the potential of the input, the output of the comparator 24 becomes
It goes from Hi to Lo, transistor 25 turns off,
The relay 26 is also turned off, the switching contact 26a is switched from knee to knee, the energization to the ignition heater 18 is stopped, and the ignition state shifts to the combustion state.

On the other hand, at this time, the temperature switch 19 provided at the air outlet 3 has already detected the temperature of the hot air mixed with the exhaust gas blown out by the fan 7 and is closed.

In such a state, when the lever 16 is pushed up to extinguish the fire, the temperature switch 21 changes from A to E.
When the switch is switched to B, the power to the fan 7, electromagnet 17, etc. is cut off, and the operation is stopped. However, even if the operation is stopped, the temperature switch 19 is closed, so the ignition heater 18 is energized.
The gas generated when extinguishing the fire is burned away by the heat of the heater. And this ignition heater 18
The energization is continued until the temperature of the temperature switch 19 drops to a constant temperature.

Here, this combustion device has an inlet 2 in the upper part and an outlet 3 in the lower part, and both the upper and lower sides of the passage 5 which communicates these are open. A draft occurs. This draft causes cold air to be sucked from the air outlet 3. Therefore, the temperature switch 19 provided in the passage near the air outlet 3 is cooled by the cold air as soon as the operation is stopped, and the temperature is reduced to a predetermined temperature in a relatively short time. Moreover, since the temperature switch 19 is located near the air outlet 3, it is less likely to be affected by radiant heat from the combustion section, unlike when the temperature switch 19 is installed deep in the passage 5, and the temperature always drops to a predetermined temperature at approximately the same time. I come to do it.

As described above, according to the present invention, it is possible to significantly reduce the odor caused by gases that are present when extinguishing a fire, and it is also possible to shorten the power supply to the ignition heater for preventing the firefighting odor. can also be made stable. Moreover, it can be provided at a low price, and has great effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a combustion device according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram thereof. 1...Main body, 2...Suction port, 3...Blowout port, 5
... passage, 10 ... combustion section, 18 ... igniter, 1
9...Temperature switch.

Claims (1)

[Claims] 1. A main body with an inlet at the top and an outlet at the bottom, a combustion section provided in a passage between the inlet and the outlet of the main body, an igniter placed close to the combustion section, and the ignition and a temperature switch provided in the energizing circuit of the combustion device, the temperature switch being provided in a passage near the outlet.