JPH0211801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an odor absorption control device for a wick type oil combustor.

Conventional technology In general, wick-type oil combustors have a problem in that when the wick is lowered to extinguish the fire, the oil vapor that continues to evaporate from the wick enters the high-temperature combustion cylinder, where it is thermally decomposed and generates a strong odor. Ta.

Recently, in order to reduce the odor caused by extinguishing a lamp, a method has been proposed in which an odor absorbing device such as a fan is activated at the same time the lamp is extinguished, and the petroleum vapor that continues to evaporate from the wick is sucked into the tank and then released to the outside. Figures 2 and 3 show a wick-type oil combustor with such a device.When the wick 1 is lowered to extinguish the fire, the fan 3 of the odor absorbing device 2 starts rotating, and the oil vapor that continues to vaporize from the top of the wick 1 is removed. It is sucked into the tank 4 as shown by the arrow and discharged to the outside through the discharge port 5.

According to this wick-type oil combustor equipped with an odor absorbing device, the oil vapor that continues to be generated after extinguishing is heated to the combustion tube 6.
Since it is released into the atmosphere through the tank without flowing into the tank, the irritating odor caused by thermal decomposition of petroleum vapor is eliminated, and odor can be significantly reduced.

A control device for such an odor absorbing device for a wick-type oil combustor has conventionally been constructed as shown in FIG. The configuration will be described below along with an explanation of its operation. First, rotate the wick top and bottom knobs 7 to raise the wick 1 and ignite it with an ignition device (not shown).
The common contact 8a of the switch 8, which is interlocked with the switch 8, is switched to the normally open contact 8b side. As a result, switch 8,
The capacitor 10 is charged via the resistor 9, and the transistors 11 and 12
These transistors 11 and 12
Turn on.

Next, from this state, when the lamp wick upper and lower knobs 7 are rotated to lower the lamp wick 1 and extinguish the fire, the common contact 8a of the switch 8 is switched to the normally closed contact 8c side. As a result, electricity flows to the base of transistor 15 via transistor 12, switch 8, and resistors 13 and 14, and this transistor 15
Turn on. As a result, the motor 16 of the fan 3 starts rotating, and as described above, the petroleum vapor that continues to vaporize from the top of the wick is sucked into the tank. On the other hand, at the same time, charging of the capacitor 19 is started via the resistors 17 and 18, and when the charging voltage reaches a certain value, the comparators 20 and 21 are activated to turn off the transistor 11. As a result, the transistor 12 is also turned off, and furthermore, the transistor 15, which was supplied with power via the transistor 12 and the switch 8, is also turned off, and the motor 16 of the fan 3 stops rotating. That is, the motor 16 rotates and performs the odor absorbing operation until the capacitor 19 is charged to a certain voltage, and then automatically stops.

Problems to be Solved by the Invention However, in the conventional control circuit described above, when the combustor is burning, a weak current flows from the battery 22 serving as the power source to the transistors 11 and 12 as described above. For example, when we actually measured this conventional circuit, the voltage of the battery 22 was 3.2V and the current was approximately 0.83mA. As described above, this control circuit has a problem in that a weak current continues to flow while the combustor is burning, which wastes the battery 22. For example, when lighting a lamp wick, assuming that the battery voltage is 3V, the current flowing through the ignition heater is 1A, and the time required for ignition is 5 seconds, the total power required for ignition will be 3 x 1 x 5 = 15 W・sec. With this calculation, it is 0.83m as in the conventional example.
If it is used for 10 hours while flowing A, battery voltage 3V Flowing current 0.83mA = 0.83 × 10 ^-3 A Consumption time 10 hours = 10 × 60 × 60 seconds = 36 × 10 ³ Power consumption = 3 × 083 ×10 ⁻³ ×36×10 ⁻³ =89.64 w·sec That is, it is about 6 times the ignition power mentioned above, and therefore, the same power as 7 ignition operations including normal ignition is consumed. As a result, there was a problem in that the life of the battery was significantly shortened.

The present invention was made in view of these points.
The purpose is to eliminate wasteful consumption of power sources such as batteries and improve the lifespan of power sources.

Means for Solving the Problems In order to achieve the above object, the present invention forms a closed circuit with a power supply, a motor, and a transistor, and a capacitor connected to a common contact of a changeover switch, and a resistor connected to a normally open contact with the power supply. A closed circuit is formed, and the normally closed contact of the changeover switch is connected to the power supply side of the timer circuit, and the output side of the timer circuit is connected to the base of the transistor.

Function Since the present invention is constructed as described above, during combustion, the selector switch is switched to the power supply side and the capacitor is charged, but when the capacitor is completely charged, the charging action is automatically stopped and the capacitor is charged. After that, no power is consumed and the lifespan of the power supply can be extended.

Embodiment One embodiment will be explained below using FIG. 1. In FIG. 1, 21 is a power source such as a battery, 22
23 is a motor for the odor absorbing fan connected to the battery 21, and 23 is connected to the power source 21 in parallel with the motor 22.
A capacitor is connected through a changeover switch 24 having a normally open contact 24b to which a resistor 25 is connected, and is connected to a common contact 24a of the changeover switch 24. The normally closed contact 24c of the changeover switch 24 is connected to the power supply 21 via a timer circuit 26, and the output 26a of the timer circuit 26 is connected to the base of a transistor 27 which forms a closed circuit with the power supply 21 and the motor 22. Note that the timer circuit includes transistors 28, 29, resistors 30, 31, 32, 33,
It is composed of a Schmitt circuit consisting of a 34, 35 capacitor 36.

In the above configuration, when this control circuit is used in a wick-type oil combustor as explained in FIGS. 2 and 3 and the wick 1 is raised to start combustion, the common contact 24a of the changeover switch 24 changes to the normally open contact 24b. charging of the capacitor 23 is started.
When the charging pressure of the capacitor 23 reaches a certain value, charging of the capacitor 23 stops and no electricity flows through the circuit. In other words, the flow of electricity during combustion of the appliance, in other words, the unnecessary use of electricity, is eliminated.

When the lamp wick 1 is lowered in such a state to extinguish the fire, the common contact 24a of the changeover switch 24 returns to the normally closed contact 24c side, and the charge in the capacitor 23 that was charged during combustion is discharged. The timer circuit 26 composed of a Schmitt circuit starts operating. When a voltage is applied between the power supply points a and b of this circuit, the capacitor 36 is not charged yet, so the transistor 28 is turned off, so the transistor 29 is turned on, and the transistor 27 is also turned on, and the motor 22 starts rotating. . When the capacitor 36 starts charging through the resistor 30 and approximately one minute has elapsed, the transistor 28 is turned on, so the transistor 29 is turned off, the transistor 27 is also turned off, and the motor 22 is stopped. Note that even while the motor 22 is rotating, the combustion side, that is, the common contact 2 of the changeover switch 24 is
Even if 4a is turned to the normally open contact 24b side, the power supply to the timer circuit 26 is stopped at that point, so the motor 22 is stopped from rotating.

According to this embodiment, the timer circuit 26, that is, the transistor 27 is turned on by the charging voltage of the capacitor 23, and the motor is rotated by the voltage of the power supply 21, so the capacitor 23 operates the timer circuit 26 and the transistor 27. It is only necessary to have a capacity to charge the same amount of charge, which has the advantage of reducing costs by reducing the capacitance of the capacitor.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, no wasteful electricity flows during combustion of the appliance, so that the life of the power source such as a battery can be lengthened accordingly, which is economical. In addition, the circuit is very simple and requires only a small number of parts, reducing the risk of breakdowns, etc., and since it uses a timer circuit using a Schmitt circuit, it operates reliably as a timer, and its effects are great. be.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an odor absorption control device according to a first embodiment of the present invention, FIG. 2 is a top view of a combustion appliance using the present invention and a conventional odor absorption control device, and FIG. FIG. 4 is a circuit diagram of a conventional odor absorption control device. 21... Power supply, 22... Motor, 23... Capacitor, 24... Changeover switch, 24a... Common contact, 24b... Normally open contact, 24c... Normally closed contact, 26... Timer circuit, 27... transistor.

Claims (1)

[Claims] 1 A closed circuit formed by a power source such as a battery, a motor for the odor absorption fan, and a transistor, a capacitor connected to a changeover switch and the common contact of this switch, and a resistor connected to the normally open contact of the power source and changeover switch. and a timer circuit whose input side is connected to the normally closed contact of the changeover switch and whose output side is connected to the base of the transistor.