JPS6324214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wick-type combustion appliance that is automatically ignited by a timer.

BACKGROUND ART A conventional combustion appliance will be explained using FIGS. 1 and 2. In FIG. 1, 1 is a tank, and the inside is filled with kerosene. A guide tube 3 and a wick outer tube 4 for the lamp wick 2 are installed in the upper part of the tank 1, and the lamp wick 2 moves up and down between the guide tube 3 and the wick outer tube 4, and has a structure in which ignition and extinguishment are performed. It's summery. The lamp wick 2 is raised and lowered by a lever 5. The right end of the lever 5 is lowered, and the lamp wick 2 is raised by being attracted to the solenoid 6, and ignition and combustion are performed at this position. The lever 5 is raised automatically by a spring 7.

The control circuit for such a combustion appliance is shown in FIG. That is, power supply 8, switch 9,
The contact group 11 of the timer 10 and the control unit 12 form a closed circuit, and the timer 10 is connected to the power supply 8 and the control unit 12.
From the connection point, turn ON for timer setting of contact group 11.
It is connected to contact 13. A relay 14, a series circuit consisting of the solenoid coil 15 of the solenoid 6 shown in FIG. 1 and the normally open contact 16 of the relay 14 are connected in parallel with the timer 10. Note that the normally closed contact 17 of the relay 14 is connected to the contact group 1 of the timer 10.
It is connected to the contact 18 side of No. 1. Further, another relay 20 is connected to the control unit 12, and its normally closed contact 21 is connected in series to the relay 14.

The operation of this circuit will be explained. Assuming that timer 10 is set to the timer side and switch 9 is closed, the voltage passes through switch 9 to timer contact 13 and timer 1.
0 loop and the timer 10 starts operating. At this time, the lever 5 in Figure 1 is pushed down, the solenoid 6 attracts the lever, and the wick 2 is raised, but the contact 18 side of the contact group 11 is on the contact 19 side, so the circuit is opened. Therefore, the control unit 12 is not energized and the ignition operation is not performed.
At this time, voltage is also applied to the relay coil 14, so the relay contact falls to the normally open contact 16 side, voltage is also applied to the solenoid coil 15, and the solenoid 6 is attracted. When the set time comes, the contacts 18 of the contact group 11 fall down from the contact 19 side to the contact 13 side, voltage is applied to the control unit 12, and ignition operation is performed. In addition, when performing continuous combustion without using the timer 10, when the timer knob is turned to the continuous side, the power supply side contacts of the contact group 11 will fall from the contact 13 side to the contact 19 side, and the contacts 18 will fall from the contact 13 side to the contact 19 side. Power is applied to the solenoid 15 and the control unit 12, so when the lever 5 is pushed down, the ignition operation is performed.

Problems to be Solved by the Invention However, in the conventional configuration described above, when the setting is changed from continuous combustion to the timer 10, in the contact group 11, the power supply side contact is on the contact 13 side, and the relay 14
The contacts fall to the normally open contact 16 side, but if you set them quickly, the voltage supply to the solenoid 15 turns ON-OFF and ON too quickly, so the solenoid 6 does not have time to release the lever 5, and the lamp wick 2 The disadvantage is that it continues to burn.
In other words, when setting the timer from continuous steady combustion, there is no problem if the timer is rotated slowly.
If the lamp is rotated quickly, the mechanism that lowers the wick may not have enough time to operate, and the wick may not lower (extinguish) and continue to burn, which is extremely dangerous. Ta.

Therefore, the inventor of the present invention provided a relay 20 in the control section 12, and considered that the relay 20 cuts off the voltage supply to the solenoid coil 15 of the solenoid 6 to solve the unreasonable point in such a case. That is, the relay 20 is a delay relay that takes time for the contacts to operate after the power is cut off, and the normally closed side of the contact 21 of the relay 20 is connected to the relay coil 14. Therefore, even if the timer knob is turned quickly, the contact 21 is still open and the relay 14 is not energized, so no voltage is supplied to the solenoid coil 15, and during this time the solenoid 6 releases the lever 5. However, in this configuration, two relays 14 and 20 are always required, and the timer 10 is also complicated.

The present invention was made in view of these points.
This is an attempt to improve safety with a simple and inexpensive configuration.

Means for Solving the Problems In order to achieve the above object, the present invention connects a transistor for driving the solenoid to the solenoid that holds the lamp wick in the raised position, and connects the timer side contact of the timer to a charging circuit consisting of a resistor and a capacitor. The contact point on the continuous operation side of the timer is connected to directly operate the transistor.

Effects The present invention has the above-mentioned configuration, so that even if there is a sudden switch from continuous steady combustion to timer operation, the solenoid will not be energized until the capacitor is charged to a predetermined voltage, so the wick will always go down and the relay will There is no need to use two , and the configuration is simple.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 3 shows a circuit diagram of the combustion appliance of the present invention, and the components will be explained with reference to those in FIG. 1. The power supply 22 shown in FIG.
Control unit 38 - point b - creates a closed loop of power supply. A series circuit of diode 26-d, current limiting resistor 27-e, Zener diode 28 is connected between points a and b. A capacitor 29 serving as a power source for a differential amplifier (hereinafter referred to as a comparator) 30 and series resistors 31 and 32 for setting a reference potential are connected in parallel between points eb and eb, respectively. Next, on the timer side 33 of the timer contacts, a timer 34 is connected between points b through point f. Also, from point f, diode 35 - resistor 36 - point g -
A series circuit of capacitors 37 is connected to point b. From point c, the control unit 38 and the diode 39
A series circuit of - point h, resistor 40, point i, and capacitor 41 are connected at point b. A resistor 42--a point j--a capacitor 43 are connected from point h to point b. The base of the first transistor 44 is connected to point j, the collector to point g, and the emitter to point b. Comparator 30
The side input is connected to the connection point k between the resistors 31 and 32, the side input is connected to the g point, and the output is connected to the j point through the resistor 45. From point d, solenoid 6 in Figure 1
The collector of a second transistor 47 is connected through the solenoid coil 46, and its base is connected to point i, and its emitter is connected to point b.

The operation of this circuit will be explained. Assume that the timer knob is set to the timer side. When the switch 23 is closed, a voltage is applied between points a and b, and since the timer contact power supply side 24 is closed to the timer side 33, a voltage is applied to the timer 34. At this time, a voltage is applied to the solenoid 46 and the resistor 27 through the diode 26. Therefore, since a DC voltage is generated between points e and b, point k is set to a certain potential. Then, charging of the capacitor 37 is started by the resistor 36 through the diode 35, and after a certain period of time, the potential at the g point becomes higher than the k point, the output of the comparator 30 becomes high, the transistor 47 becomes active, and the solenoid coil 46 is activated. is excited,
Solenoid 6 attracts lever 5.

Next, when the timer is set to the continuous side, the timer contact power supply side 24 and the control unit side 25 are connected, and a voltage is applied to point c. At this time, since no voltage is applied to point f, the circuit of timer 34 and diode 35 does not operate. On the other hand, since a voltage is applied to the control section 38, an ignition operation is performed. Also, since a half-wave voltage is applied to point h, the capacitors 43 and 41 are charged in the circuits of resistor 42 → capacitor 43 and resistor 40 → capacitor 41, respectively, so transistor 44 becomes operational, but comparator 3
Since the 0 side becomes 0 potential, the output of the comparator 30 becomes 0 potential. However, since the capacitor 41 is charged by the resistor 40, the transistor 4
7 becomes operational, and the solenoid coil 46 is energized. This is combined with the ignition action to ensure normal combustion.

In this state, no voltage is applied to the capacitor 37, so the charge is zero. Suppose you quickly set the timer knob to the timer in this state. The timer contact power supply side 24 is connected from the control unit side 25 to the timer side 33.
The voltage is applied to the timer 34. Since the operation of the transistor 47 to the solenoid coil 46 is slightly delayed, the energization is delayed, and during this time the right end of the lever 5 is sure to rise and the fire is extinguished. That is, at first, the charge on the capacitor 37 is 0, so the potential on the comparator 30 side is low and no output is produced, and since there is no voltage supplied from point h, the transistor 47 becomes inactive, and after a while, the capacitor 37 Due to charging, the potential at point g becomes h
The point is crossed, the output of the comparator 30 is output, the transistor 47 is activated, and the solenoid 46 is energized for the first time.

Effects of the Invention As described above, according to the present invention, during steady combustion,
In other words, even if you set the emergency timer while the wick is raised and burning, the wick will always go down, so you will have to extinguish the fire and raise the wick again.

Therefore, there is no need to check whether the wick is ignited, and there is no need to inadvertently ignite the wick, resulting in extremely high safety and good operability.

In addition, mechanically, it does not require relays, etc., and can be provided at low cost. It also eliminates the need to consider the relationship with the control unit, unlike when a relay is installed in the control unit, and the timer mechanism is simple. .

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a combustion appliance, FIG. 2 is an electric circuit diagram of a conventional example, and FIG. 3 is an electric circuit diagram showing an embodiment of the present invention. 2... Lamp wick, 38... Control unit, 46... Solenoid coil, 47... Transistor.

Claims (1)

[Claims] 1. In a combustion appliance that moves a lamp wick up and down to burn and extinguish the fire, and also automatically ignites the wick after a predetermined time has elapsed using a timer, a solenoid that holds the lamp wick in a raised position is equipped with a transistor for driving the solenoid. and the timer side contact of the timer is connected to the transistor via a charging circuit consisting of a resistor and a capacitor, and the continuous operation side contact of the timer is connected to directly operate the transistor.