JPH04106313A - Odor absorption control device for petroleum combustion device - Google Patents

Abstract

PURPOSE:To provide a petroleum combustion device capable of getting a simple and easy circuit configuration in a less-expensive manner and improving a convenience in use by a method wherein a driving period for an odor adsorption motor is judged in response to an opened or closed state of a sensor switch as well as a potential of a capacitor in a CR circuit and a driving signal generating circuit for outputting the odor adsorption motor driving signal for a specified period of time is provided. CONSTITUTION:An igniting operation or a fire distinguishing operation is detected by a sensor switch 4. A CR circuit 15 has an electrical charging or an electrical discharging period and starts a driving of an odor adsorption motor 14. As a predetermined time elapses and a potential of a capacitor 8 in the CR circuit reaches a threshold value, it is judged that an electrical charging or an electrical discharging is completed and the driving of the odor adsorption motor is stopped. That is, the odor adsorption is controlled by one circuit configuration during ignition and during fire distinguishing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control circuit for an odor absorbing device that reduces the odor caused by unburned petroleum gas during ignition and extinguishment in an oil combustor.

BACKGROUND OF THE INVENTION In general, wick-type oil combustors have a problem in that after extinguishing the wick, petroleum vapor vaporizes from the wick and rises up, touches the still-hot combustion tube, and is thermally decomposed, producing an odor.

Recently, in order to reduce this odor, when a fire is extinguished, two odor absorbers such as fans are activated to suck unburnt petroleum gas, which tends to rise toward the combustion tube due to the draft effect, into the tank and then release it to the outside. It is suggested that something be done.

Furthermore, this type of wick-type oil combustor has the problem of generating odor due to incomplete combustion due to an imbalance between the amount of vaporized gas from the wick and the amount of combustion air when ignited. Applications have also been filed to reduce odors by occasionally operating odor absorbing devices such as the above-mentioned fans.

FIG. 3 shows a wick type oil combustor having such an odor absorbing device, in which the fan 27 of the odor absorbing device 28 is turned on during ignition and extinguishing.
rotates and sucks the vaporized petroleum vapor from the upper part of the wick 20 into the oil tank 21 as shown by the arrow, and releases it to the outside from the outlet 24. 22 in the figure is a wick up/down operation mechanism;
25 is a normally closed valve that opens when exhausted, and 26 is a fan 27.
It is an odor absorption motor that rotates the

This wick-type oil combustor with an odor absorbing device↓ Accordingly, when igniting and extinguishing, unnecessary oil vapor does not flow into the combustion tube 22 and is released into the atmosphere through the oil tank 21. Odors caused by thermal decomposition of steam or odors caused by incomplete combustion can be reduced.

In such an oil combustor odor absorbing device, the control device that operates the odor absorbing device when igniting and extinguishing has conventionally
It was configured as shown in Figure 4. The configuration and operation will be explained below.

The ignition switch 34 and the extinguishing switch 51 are both switches whose contacts open and close in conjunction with the wick up/down mechanism.
The normally closed contact 34a of the ignition switch 34 is ON at the time of ignition.
L, normally closed contact 51a is set to O when extinguishing switch 51 when extinguishing
It is arranged so that N. Except for this point, the configurations of the circuit section for odor absorbing operation during ignition and the circuit section for odor absorbing operation during extinguishing are completely the same, so the operation will be explained only for the circuit section for odor absorbing operation during extinguishing.

First, when the lamp wick up and down mechanism 23 is operated to raise the lamp wick 2o and ignite it, the capacitor 52 is charged through the normally closed contact 51b of the extinguishing switch 51.

Next, from this state, operate the wick up/down mechanism 23 to raise the wick 2.
When the fire is extinguished by lowering the
, the resistor 53, and the switch 51 when extinguishing the fire. This release tiiK turns on the transistor 55, and the resistor 6
A base current flows to the transistor 66 via the transistor 5, and the transistor 66 is turned on. As a result, the motor 26 operates, the fan 27 starts rotating, and petroleum vapor is sucked into the tank 21. Also, the transistor 55 is turned on.
Then, a current is supplied to the transistor 57 via the resistor 61.59, turning the transistor 57 ON. This causes the transistor 55 to discharge the capacitor 52.
Even if the current 1ii disappears, the base current continues to flow through the transistor 57.

At the same time, charging of the capacitor 64 is started via the resistor 63, and when the charging voltage reaches the emitter potential of the transistor 62 or higher, the transistor 62 is turned on. As a result, transistor 57 is turned off, and transistor 55 is also turned off. Further, the power supply to the transistor 66 is also stopped, so that the transistor 66 is turned off, the operation of the motor 26 is stopped, and the rotation of the fan is stopped. That is, from when the normally closed contact 51a of the fire extinguishing switch 51 is turned on until the capacitor 64 is charged to a constant voltage, the motor 26 rotates to absorb odor during extinguishing, and then the motor 26 automatically switches off. stops.

The circuit section for odor absorption operation at the time of ignition operates in a similar manner, and the motor 26 rotates for a certain period of time after the normally closed contact 34a of the ignition switch 34 is turned on to perform odor absorption at the time of ignition.
In the figure, 3] is a battery as a power source, 32 is an ignition heater for the lamp wick 20, and 33 is an ignition switch.

Problems to be Solved by the Invention However, in the conventional configuration as described above, in order to control the odor absorption operation at the time of ignition and extinguishing, 2. Two switches are required to detect the timing of start-up, and other circuit components are required to absorb odor at zero ignition and when extinguishing, which takes twice as long to absorb odor when extinguishing. Although it has the advantage of improving usability, it has the problem of significantly increasing costs.

The present invention has been made to solve these problems, and is an inexpensive oil combustor that realizes odor absorption control at the time of ignition and extinguishing with a single detection switch and a simple circuit configuration, and has an improved usability. The purpose is to provide the following.

! ! Means for Solving the Problems In order to solve the above problems, the odor absorption control device of the present invention includes means for determining the odor absorption operation period at the time of ignition and at the time of extinguishing.
A detection switch whose contacts open and close according to ignition and extinguishing operations, a CR circuit which charges and discharges as the contacts of this detection switch open and close, and an odor absorbing motor drive signal during the charging and discharging periods of the capacitor of the CR circuit. It consists of a drive signal generation circuit that outputs.

Operation According to the present invention, with the above-described configuration, the detection switch detects that the ignition or extinguishing operation has been performed, the CR circuit enters the charging or discharging period, and the driving of the odor-absorbing morph is started. When the potential of the capacitor of the CR circuit reaches a threshold value after a predetermined period of time has elapsed, it is determined that the charging or discharging period has ended, and the driving of the odor absorption motor is stopped.

That is, the odor absorbing operation during ignition and extinguishing is controlled by one circuit configuration.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which a control circuit is constructed using a C-MOS NCR gate in order to suppress battery current consumption.

In Figure 1, l is the battery, 2 is the ignition heater for the lamp wick,
3 is an ignition switch, and 4 is a detection switch. This detection switch 4 is arranged in conjunction with the lamp wick up/down operation configuration, so that when the lamp wick is raised and the ignition operation is performed, the contact is ON, and when the lamp wick is lowered and the extinguishing operation is performed, the contact is turned OFF. There is.

First, when the ignition operation is performed from the extinguished state, the detection switch 4
The contact of gate 6a changes to ONL, the input of gate 6a changes to high level, and the output of gate 6a becomes low level. As a result, the capacitor 8 of the CR circuit 15 charged at the time of extinguishing the fire starts discharging via the resistor 7, but the capacitor 8 still remains.
Since the potential of the gate 6b is higher than the threshold of the gate 6b, the output of the gate 6b remains at a low level.

One of the inputs of gate 6c is connected to the output of gate 6a, and the other is connected to the output of gate 6b, and at this point, the input of gate 6c is at a low level.
The output of becomes high level, and the diode 9 and resistor 13
A base current flows through the transistor 12 through the transistor 12, and the transistor 12 is turned on.

When the transistor 12 is turned on, the odor absorption motor 14 rotates and sucks petroleum vapor.

As the discharge of the capacitor 8 progresses and a predetermined time elapses, the potential of the capacitor 8 becomes lower than the threshold value of the gate 6b, the output of the gate 6b switches to a high level, and the gate 6
The output of c also switches to a low level. Then, the transistor ]2 becomes 0FFL, and the odor absorbing motor 14 also stops, completing the odor absorbing operation at the time of ignition.

Next, when the fire extinguishing operation is performed, the contact of the detection switch 4 becomes 0.
The input of FFL gate 6a switches to low level, and the output of gate 6a becomes high level.

As a result, the capacitor 8 of the CR circuit 15 is gradually charged via the resistor 7.

One of the inputs of the game controller 6d is connected to the detection switch 4 and is at a low level, and the other is connected to the capacitor 8 of the CR circuit 15. The potential of capacitor 8 is
Since it is still lower than the threshold of gate 6d, gate 6d
The output of becomes high level, and the diode 10 and resistor 1
A current flows to the base of the transistor 12 through the transistor 3, and the transistor 12 is turned on. When the transistor 12 is turned on, the odor absorbing morph 14 rotates and sucks petroleum vapor. As the charging of the capacitor 8 progresses and a predetermined time elapses, the potential of the capacitor 8 becomes higher than the threshold value of the gate 6d, and the output of the gate 6d switches to a low level. At this point, the transistor ]2 becomes 0FFL, the odor absorbing motor 14 also stops, and the odor absorbing operation at the time of extinguishing the fire is completed. Reference numeral 5 represents a resistor, and 16 represents a drive signal generation circuit.

FIG. 2 is a timing chart of the odor absorbing operation during ignition and extinguishing. This shows that the charging period and discharging period of the capacitor 8 are used to control the driving period of the odor absorption motor.

Effects of the Invention As described above, according to the odor absorption control device of the present invention, the odor absorption operation at the time of ignition and extinguishing can be controlled with one detection switch and a simple circuit configuration, so it is inexpensive and easy to use. Oil burners can be provided.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of an odor absorption control device for an oil combustor according to an embodiment of the present invention, Fig. 2 is a timing chart showing the operation of the odor absorption control device, and Fig. 3 is a lamp wick employing a general odor absorption device. FIG. 4 is a schematic diagram of a conventional oil combustor with main parts cut away, and is a circuit diagram of a conventional odor absorption control device. 1... Battery, 4... Detection switch, 1
4...Odor absorption motor, 15...CR circuit, 16
...Drive signal generation circuit.

Claims (1)

[Claims] An odor absorption motor that rotates a fan to suck in petroleum vapor and reduce odor during ignition and extinguishing, a detection switch whose contacts open and close in response to ignition and extinguishing operations, and a detection switch whose contacts open and close as the contacts of the detection switch open and close. a CR circuit that charges and discharges the battery, and a drive signal generation circuit that determines the drive period of the odor absorption motor from the potential of the capacitor of the CR circuit and the open/closed state of the detection switch, and outputs the odor absorption motor drive signal for a certain period of time. Oil combustor odor absorption control device.