JP3021511B2 - Odor control device for light-core oil combustors - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an odor control device for a light-core oil combustor.

2. Description of the Related Art In general, a wick-type oil combustor has a problem in that petroleum vapor vaporized from the wick at the time of fire extinguishing is thermally decomposed in a combustion cylinder to generate odor.

Therefore, recently, in order to reduce the odor, a method has been proposed in which an odor absorbing device such as a fan is operated at the time of fire extinguishing, and unnecessary oil vapor is sucked into a tank and then discharged to the outside.

However, this kind of wick type oil combustor has a problem that odor is generated at the time of ignition, and the applicant first applied the idea of operating the odor absorbing device such as the fan at the time of ignition to reduce the odor. are doing.

FIG. 2 shows a wick-type oil combustor having such an odor absorbing device, in which the fan 43 of the odor absorbing device 42 rotates at the time of ignition and fire extinguishing, and the oil vapor which evaporates from the upper portion of the wick 41 is stored in a tank 44.
It is sucked in and discharged to the outside through the outlet 45.

According to this wick type oil combustor with an odor absorbing device, at the time of ignition and fire extinguishing, unnecessary oil vapor does not flow into the combustion cylinder 46, but is released to the atmosphere via the tank 44, so that the oil vapor is heated. The odor generated by the decomposition can be reduced.

Conventionally, such a control device for the odor absorbing device of a light-core oil combustor has been configured as shown in FIG.

The configuration and operation will be described below. First, when the lamp core 41 is raised by operating the lamp core up / down knob, a current flows through the resistor 36 through the normally open contact of the switch 33 linked to the lamp core up / down knob, and the input to the ignition timer 38 switches from low to high. As a result, the ignition timer 38 is started, a drive permission signal is output from the ignition timer 38 to the motor drive circuit 39, and the motor 40 rotates to perform the odor absorbing operation. After a certain period of time, the drive permission signal from the ignition timer 38
It turns off and the motor 40 stops.

Next, operate the wick up / down knob to lower the wick 41,
When the fire is extinguished, the normally closed contact of the switch 33 turns ON, current flows through the resistor 35, and the input to the fire extinguishing timer 37 changes from low to high.
Switch to As a result, the fire extinguishing timer 37 is started, a driving permission signal is output from the fire extinguishing timer 37 to the motor drive circuit 39, and the motor 40 rotates to perform an odor absorbing operation.
When a certain time has elapsed, the drive permission signal from the fire extinguishing timer 37 is turned off and the motor 40 stops.

Problems to be Solved by the Invention However, in the case of a light-core oil combustor, the situation of odor generation at the time of ignition and at the time of fire extinguishing is significantly different. The time indicates an odor generation state having a peak odor lower than that at the time of ignition but having a relatively long generation period. For this reason, in the above-mentioned conventional device, the battery voltage is directly applied to the odor absorbing motor, so that the rotation speed of the odor absorbing motor cannot be controlled, and it is difficult to obtain an air volume appropriate for the odor absorbing operation at the time of ignition. When a large fan is used, the progress of ignition of the entire light core is hindered, and white smoke is generated by unburned petroleum gas. On the other hand, when a fan with a small air flow is used, there is a problem that odor is not sufficiently reduced.

The present invention has been made to solve such a problem.
An object of the present invention is to make it possible to sufficiently reduce the odor according to the odor generation state at the time of ignition and at the time of fire extinguishing without adversely affecting the ignition performance.

Means for Solving the Problems To solve the above problems, the odor control device of the present invention is:
An odor absorbing motor drive circuit provided with means for switching the voltage applied to the odor absorbing motor in a plurality of stages; an ignition and extinguishing voltage switching timer that sets a time for switching the voltage applied to the odor absorbing motor; and an odor absorbing motor during ignition and extinguishing. An ignition timer and a fire extinguishing timer that set the time for driving the battery, and a timer start switch that switches contacts when the wick rises and falls, according to the switching of the contacts of the timer start switch. Start the voltage switching timer for ignition and the timer for ignition at the time of ignition, set the optimal absorption pattern at the time of ignition via the odor absorbing motor drive circuit, and start the voltage switching timer for fire extinguishing and the timer for fire extinguishing at the time of fire extinguishing. A configuration in which an optimal absorption pattern is set at the time of fire extinguishing through the odor absorbing motor drive circuit, Suction pattern of time are configured to optimize by arbitrarily setting the applied voltage, a voltage switching time and 吸臭 motor driving time to 吸臭 motor.

Operation According to the present invention, the voltage applied to the odor absorbing motor can be switched at a set predetermined time and the number of rotations of the odor absorbing motor can be changed by the above configuration, so that the suction force for sucking the oil vapor into the tank can be moderated. Therefore, if the voltage switching time is set in advance according to the progress of ignition and fire extinguishing, a suction pattern having the best odor absorbing effect can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

First, in the odor-absorbing operation at the time of ignition and extinguishing, as shown in FIG. 3, the pattern of increasing the air volume immediately after the ignition and extinguishing and then gradually decreasing the air volume to suck the oil vapor has no effect on the ignition performance, and It was confirmed by an odor measurement experiment that the odor reduction effect was also large. To realize such a suction pattern after ignition the voltage applied to the吸臭motor as FIG. 4, t ₁ second, higher voltage V _1, that may be switched to a subsequent low voltage V ₂ it is obvious. FIG. 1 shows an embodiment of a circuit for performing voltage control as shown in FIG.

In FIG. 1, 1 is a battery, 2 is an ignition heater, 3 is an ignition switch, and 4 is a timer start switch.

The voltage switching timer (at the time of ignition) 8, the voltage switching timer (at the time of fire extinguishing) 9, the ignition timer 10 and the fire extinguishing timer 11 are constituted by a C-MOS AND gate and a CR charge / discharge circuit. The timer start switch 4 operates in conjunction with the light core lever. When the light core rises, the normally open contact turns on, and when the light core falls, the normally closed contact turns on.

The capacitor 8d of the voltage switching timer (at the time of ignition) 8
While the normally closed contact is ON, the battery is charged via the diode 8a and the resistor 8b, but the output of the gate 7a is at the low level because one of the input terminals is at the low level. However, when the ignition operation is performed, the lamp core rises, the normally closed contact of the timer start switch 4 is turned off, and the normally open contact is turned on, so that both the inputs of the gate 7a become High level and the output of the gate 7a becomes High. Become a level. At the same time capacitor 8d
Starts discharging through the resistor 8c.

When the output of the gate 7a goes high, the diode 12
The base of the transistor 14h in吸臭motor drive circuit 14 via is driven, the transistor 14h is turned ON, the吸臭motor 15, voltages V ₁ obtained by subtracting the collector saturation voltage of the transistor 14h from the battery voltage.

At the same time, the output of the gate 7a charges the capacitor 10d of the ignition timer 10 via the diode 10a and the resistor 10b.

When the discharge of the capacitor 8d of the voltage switching timer (at the time of ignition) 8 progresses and the voltage of the capacitor 8d falls below the input threshold of the gate 7a, the output of the gate 7a becomes low level,
The transistor 14h turns off.

However, the output of the gate 7c of the ignition timer 10 keeps the High level because the capacitor 10d is charged, and continues to drive the base of the transistor 14c of the odor absorbing motor drive circuit 14.

When the transistor 14c is ON, a current flows through the Zener diode 14e, causing a potential difference between the emitter and the base of the transistor 14i, and the transistor 14i is turned ON.

In this case the voltage applied to the吸臭motor 15 is a voltage V ₂ obtained by subtracting the Zener voltage the emitter of the transistor 14i, a base voltage.

When the voltage switching timer (at the time of ignition) 8 times out as described above, the voltage applied to the odor absorbing motor 15 changes from V ₁ to V ₂
Switch to.

From this point on, the capacitor 10 of the ignition timer 10
d discharges through the resistor 10c. When the discharge of the capacitor 10d proceeds and the voltage of the capacitor 10d falls below the input threshold of the gate 7c, the output of the gate 7c becomes the low level,
Since the transistor 14c and the transistor 14i are turned off, the odor absorbing motor 15 stops.

Next, when the wick is lowered by the fire extinguishing operation, the normally open contact of the timer start switch is turned off and the normally closed contact is turned on.
Thereby, the voltage switching timer (at the time of extinguishing) 9 is started by the same operation as at the time of ignition, and the voltage V ₁ is applied to the odor absorbing motor 15.

When the voltage switching timer (extinguishing time) 9 Kawari is a voltage applied to the吸臭motor 15 when the timeout cut into V _2, extinguishing time timer 11 times out,吸臭motor 15 is stopped.

The time for switching the voltage applied to the odor absorbing motor 15 is as follows.
It can be set freely by changing the time constant of the CR charge / discharge circuit.

In the above embodiment, although the voltage switching of two stages of the V ₁ and V _2, 14a-14e and 14 of吸臭motor drive circuit
If the configuration of i and the voltage switching timer circuit are added, it is possible to further increase the number of voltage stages and more finely control the rotational speed of the odor absorbing motor.

As described above, according to the odor control device of the present invention, the switching timing of the voltage applied to the odor absorbing motor can be set independently at the time of ignition and at the time of fire extinguishing. Since it can be switched in time according to the pattern and the ignition performance, the absorption pattern that sucks the oil vapor into the tank can be set freely, which is the most effective in reducing the odor and the odor absorbing operation that does not adversely affect the ignition performance Can be performed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an odor control device according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing an odor control portion of a light-core oil combustor, and FIG. FIG. 4 is a graph showing the relationship between voltage applied to the odor absorbing motor and time, and FIG. 5 is a circuit diagram of a conventional odor control device. 4 ... Timer start switch, 8 ... Voltage switching timer (at ignition), 9 ... Voltage switching timer (at fire extinguishing),
10… Ignition timer, 11… Fire extinguisher timer, 14 ……
Odor-absorbing motor drive circuit, 15 ... Odor-absorbing motor.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Satoru Nitta 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-119323 (JP, A) -157909 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23D 3/18 F23Q 25/00 355 F23N 5/20 101

Claims (1)

(57) [Claims] 1. An odor control device for rotating an odor absorbing fan for a predetermined time during ignition and extinguishing, wherein an odor absorbing motor drive circuit provided with means for switching a voltage applied to the odor absorbing motor in a plurality of stages, and a voltage applied to the odor absorbing motor are switched. The ignition and fire extinguishing voltage switching timers that set the time, the ignition timer and the fire extinguishing timer that set the time during which the odor absorbing motor is driven at the time of ignition and fire extinguishing, and the contact points when the wick rises and falls. A timer start switch for switching, and in response to switching of a contact of the timer start switch, a voltage switching timer for ignition and a timer for ignition are started at the time of ignition, and an optimal time is set at the time of ignition via the odor absorbing motor drive circuit. Set the suction pattern, start the fire extinguishing voltage switching timer and fire extinguishing timer when extinguishing,
The configuration is such that an optimal absorption pattern is set at the time of fire extinguishing through the odor absorbing motor drive circuit, and the suction pattern at the time of ignition and fire extinguishing arbitrarily sets the voltage applied to the odor absorbing motor, the voltage switching time, and the odor absorbing motor driving time. The odor control device of the light-core oil combustor, which has been optimized by doing this.