JPS6246767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device in which a lamp wick is heated by electric heating means.

In general, in a wick-type combustion device, when tar etc. start to adhere to the wick, the amount of vaporization during combustion decreases, and as a result, the amount of combustion decreases and the amount of heat radiated to the wick decreases, which further reduces the amount of vaporization. However, there was a problem in that when bad kerosene, which tends to generate tar, was used, the amount of combustion thereof decreased rapidly. Therefore, we solved this problem by installing an electric heating means near the lamp wick to compensate for the decrease in the amount of radiant heat and prevent the amount of vaporization from decreasing. However, even with this method, if used for a long period of time, tar would accumulate on the wick, resulting in a reduction in the amount of combustion.
For this reason, it is necessary to dry-fire the wick after using it for a certain period of time, but if the above-mentioned electric heating means is provided, when dry-firing it, the heat of this electric heating means will be added to the combustion heat generated by the wick itself. The temperature near the wick increased abnormally, and there was a risk that the wick would burn out.

The present invention also solves these problems.
One embodiment will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a combustion tube, and its combustion state is detected by a sensor 2 installed near the combustion tube. In this combustion appliance, when a knob 3 is rotated, its cam is fixed by an electromagnet 4, and at that time, a switch 5 is closed. Further, the lamp wick 1a reaches the inside of the combustion tube 1, and an auxiliary heater 6 is provided on the outside thereof. As shown in FIG. 2, the circuit includes an AC power source 7, a switch 5, a point a, an electromagnet 4, a transistor 8, and a point b forming a closed circuit.
Between points a and b, there is a sensor circuit 9 that detects the value of the sensor 2 to detect the combustion state, and an auxiliary heater 6.
and a series circuit of thyristor 10, diode 11,
A series circuit including a dry firing switch 12, a resistor 13, and a c-point zener diode 14 are connected in parallel. Between points c and b, a series circuit of capacitor 15, resistor 16, point d, resistor 17, resistor 18, and e
The series circuits of transistors 19 are connected in parallel. Note that transistor 1 is placed at point d.
The base of thyristor 9 is connected to point e, and the gate of thyristor 10 is connected to point e. Further, signal lines are connected from the sensor circuit 9 to the base of the transistor 8 and the base of the transistor 20, respectively. The collector of transistor 20 is connected to point e. Note that a resistor 21 is connected to the base of the transistor 8 from point c.

Next, its operation will be explained. In Figure 1, turn the knob 3 to raise the wick 1a and turn the switch 5.
Close it and hold it fixed with the electromagnet 4. Then, it is ignited using a separately provided igniter. A sensor circuit 9 is activated by a signal from a sensor 2 that detects the combustion flame, and sends a signal to a transistor 8, so that an electromagnet 4 is activated to keep the knob 3 fixed.
On the other hand, a signal from the sensor circuit 9 also sends a signal to the transistor 20 to operate the thyristor 10 and control conduction to the auxiliary heater 6. When the combustion condition is poor, the conduction angle of the auxiliary heater 6 is increased to increase the amount of vaporization. Further, if the combustion state is normal, the thyristor 10 reduces the conduction angle of the auxiliary heater 6 and vaporizes only its own combustion heat. In this way, when abnormal combustion occurs due to poor combustion conditions or lack of oxygen, the amount of heat generated by the auxiliary heater 6 increases and the amount of combustion is adjusted.

When cleaning the lamp wick 1a using such a circuit, the dry burning switch 2 is closed. As a result, a direct current is generated between points c and b, and the transistor 19 is turned on, so the thyristor 10 is turned on.
It is in the OFF state, and power is no longer supplied to the auxiliary heater 6.

Electromagnet 4 also forcibly turns on transistor 8.
state, so it continues to operate. That is, sensor 2
Even if abnormal combustion is detected, the electromagnet 4 continues to operate, so the wick 1a remains raised and ready for combustion.

As described above, according to the present invention, since the combustion state can normally be controlled by an electric heating means such as an auxiliary heater, it can be used as a comfortable reheating device, and it is also safe because the electric heating means is automatically turned off during dry cleaning. etc., the effects are great.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
FIG. 2 is its electrical control circuit diagram. 1a...Light wick, 6...Auxiliary heater, 12...
Air-baked switch.

Claims (1)

[Claims] 1. A lamp wick that burns in the raised position and extinguishes in the lowered position, an electric heating means that heats the wick and vaporizes the liquid fuel, and closes when the wick is dry-fired to stop energization of the electric heating means. a dry firing switch that stops the firing; a sensor that outputs a signal to lower the wick to the extinguishing position when the wick burns abnormally; and a sensor that causes the wick to burn regardless of the output from the sensor by closing the dry firing switch. Combustion device with retention means to maintain it in position.