JPS5824693B2 - Automatic ignition circuit of oil hot air fan - Google Patents

Description

[Detailed description of the invention] This invention relates to an ignition circuit for an oil hot air fan.

Even if the supply of kerosene is stopped for an oil warmer that burns kerosene in the pot, the combustion air fan and circulation fan continue to rotate until the unburned kerosene burns on the bottom of the pot and the pot is cooled. Even if the unburned kerosene burns out and the flame goes out, if the temperature inside the pot is still high, the re-ignition operation will be activated.
That is, when kerosene □ is supplied to the pot and ignited, the kerosene rapidly evaporates and becomes a gas, which may prevent it from igniting as it should and cause an explosion.

To prevent such problems, conventional oil hot air machines that burn kerosene inside the pot do not turn on the ignition heater until the temperature inside the pot cools down to a temperature that will not cause an explosion even when the fuel valve is opened (about 10 minutes). It has no structure.

However, with these measures, if you need to relight the fire immediately after it has been extinguished, the only way to do so is to occasionally turn the power switch to "ignition" mode while timing the cooling time, which is extremely troublesome. Ta.

The present invention was invented in view of this point, and if you want to relight the fire immediately after it has started extinguishing the fire, you can operate the power switch to the "ignition" mode, and this will be memorized, and when the pot has cooled to a safe temperature. The ignition means automatically performs the ignition operation.

Before describing embodiments of the present invention, FIG. 1, which is a conventional example, will be described.

1 and 2 are power supply terminals to which commercial power is applied, and 3 is a fuse.

First, when the plugs connected to the power terminals 1 and 2 are inserted into an outlet, the secondary battery 29 is charged and at the same time the first relay 28 is operated and its contact 33 is opened, thereby opening the power outage blower 300 circuit. Turn off.

The power switch 10 is set to the "extinguish" mode when not in use.

When starting the engine, switch the power switch 10 from the "extinguishing" mode to the "combustion" mode.

That is, the switches are switched so that the contacts 10A and IOC are connected, and the contacts 13A and 13CD are connected.

Next, when the power switch 10.13 is switched to "ignition", the second relay 17 operates, and the ignition transformer 12 is energized by its contacts 11 and 16, and the ignition heater 34 becomes red hot, and at the same time the ignition lamp 8 and the power lamp 22 lights up and when released it returns to "burn" mode.

Subsequently, the third relay 18 is energized and its contact 5 rotates the combustion blower 7, which simultaneously pumps kerosene into the oil volume regulator.

19 is switched to operate.

At this time, electricity is applied at 20.21, and about 45 seconds after the electricity is applied, the timer contacts 31 and 6 are turned on.

The contact 31 prepares to rotate the power outage blower 30, and the contact 6 is used to rotate the combustion blower 7 when the contact 5 of the third relay 18 is not switched.

When combustion begins and the temperature of the pot eventually exceeds a predetermined value, the temperature switch 24 is turned on.

As a result, the convection blower 27 starts rotating, and then the fourth relay 23 is energized, and the switching of the contact 9 causes the ignition heater 34 to go out, and at the same time, the ignition lamp 8 to go out.

Combustion continues in this state.

The indoor temperature is controlled by changing the amount of kerosene supplied to the pot using an oil amount regulator.

Next, turn the power switch 10.13 from "Burning" to "Extinguishing"
When set to the mode, the second relay 11 and the third relay 18
is restored and the pump 19 is stopped.

At the same time, the timer switches 20 and 21 are turned off 3,
Thereafter, the contact 31 of the timer switch 20 is turned off after about 5 minutes, and the contact 6 of the timer switch 21 is turned off after about 8 minutes, and the power lamp 22 goes out.

When the temperature of the pot falls below a predetermined temperature, the temperature switch 24 is turned off, and the convection 3 blower 27 is turned off.
At the same time, the excitation of the fourth relay 23 is stopped and its contact 4 stops the combustion blower 1.

Emergency fire extinguishing due to an earthquake or other event is carried out by turning off either the anti-seismic switch 15 or the overheat prevention switch 14.

If there is a power outage during combustion, all circuits will be cut off, but the
The contact 33 of the relay 28 has returned as shown, and the contact 31 of the timer switch 20 has been open and closed for about 5 minutes, so the power outage blower 30 rotates, and the unburned kerosene remaining in the pot is completely removed. be burned.

Even if an attempt is made to ignite the flame again immediately after normal combustion and extinguishing operation, the flame will not ignite unless the temperature switch 24 is cooled to a temperature that turns it off.

As mentioned before, this is because the fourth relay 23 is operated until the temperature inside the pot falls and the temperature switch 24 is turned off, and the contact 9 is turned on. This is because the fire circuit is cut off.

Next, the ignition circuit of the embodiment of the present invention shown in FIG. 2 will be explained.

In FIG. 2, the power switch 100 of the conventional example shown in FIG. 1 is replaced with an ignition circuit 53, and a changeover switch 51 for the ignition lamp 8 is added.

A detailed circuit diagram of the ignition circuit 53 is shown in FIG.

In FIG. 3, when a commercial voltage is applied to primary side terminals G and J of a transformer 54, a stabilized DC voltage is generated at an output terminal 36 of a well-known stabilized DC power supply circuit 52.

At this time: a negative pulse is generated at the midpoint between the resistor 37 and the capacitor 38, that is, at the input terminal of the inverter 39.

This negative pulse is inverted by the inverter 39 and inputted to the output of the inverter 39, that is, one input terminal 43B of the OR gate 43.

Therefore, a positive pulse is generated at the output 43C of the OR gate 43, and this positive pulse is applied to the reset terminal R of the 7-lip flop 44, causing the Q output of the Nori-flop 44 to be at a low level (hereinafter abbreviated as ``L''). Reset.

Next, when the mutually moving power switches 50.13 are switched from "extinguishing" to "igniting", a positive pulse is generated at the set terminal S of the Noritsubu flop 44 by the differential circuit made up of the capacitor 40 and the resistor 41, and the Q output is biased. The 7 lip-flop 44 is set so that the level (abbreviated as "'H" after the start) is reached.

The Q output of the 7-lip flop 44 is amplified by an amplifier 45 to turn on a switching transistor 46 and energize a fifth relay 41.

As a result, contacts 51 and 55 of the fifth relay 41 are switched.

In other words, 51 switches to the power terminal 1 and the lighting lamp 8
lights up, 55 switches, and the second relay 11 self-maintains on.

When the second relay 11 is energized, its contact 49 is turned on, and 43A, which is one input terminal of the OR gate 43, is turned on.
becomes ``H'', and accordingly, the reset terminal R of the 7 flip-flop 44 also becomes ``H'', and the flip-flop 44 is reset.

When the user releases the hand, the power switch 50 returns from the "ignition" mode to the "combustion" mode, and combustion continues.

Subsequently, when the mode is switched from "combustion" to "extinguishing" mode, the second relay 17 returns and turns off.

After this, when the power switch 50 is switched to the "ignition" mode again, the flip 70 x 7" 44 is set and the relay 4
1 operates, and then the fifth relay 47 operates and the ignition lamp 8 switches to the power terminal 1 side and lights up. At the same time, the switch 55 is turned on and the second relay 11 is turned on.

Therefore, when the second relay 17 is turned on, the switches 11 and 16 linked therewith are turned on.

When the temperature of the pot is high, the temperature switch 24 is on, so the fourth relay 23. is on.

While this fourth relay 23 is on, the switch 9 linked thereto is open, so the ignition circuit does not operate.

When the temperature of the pot falls and the temperature switch 24 is turned off, the fourth relay 23 is turned off, and the switch 9 linked to this is closed, and since the flip 70 knob 44 is set, the ignition circuit operates and the ignition is automatically started. do.

As explained above, turn off the burning kerosene stove, and as soon as it is relit, operate the power switch to the ignition mode, the flip-flop 44 will be set, and the ignition will be memorized and the temperature inside the pot will be low enough to be safe. It can be re-ignited automatically when the temperature is reached.

Therefore, a safe and trouble-free oil hot air fan using a pot is obtained.

[Brief explanation of the drawing]

FIG. 1 is a circuit connection diagram of a conventional oil hot air fan, FIG. 2 is a circuit connection diagram of the oil hot air fan of the present invention, and FIG. 3 is a circuit diagram showing essential parts of the ignition circuit of the present invention. Here, 24... Temperature switch, 34...
...Ignition means, 23,9...First control circuit means, 50...Pulse generation circuit, 44...
・Bistable switching circuit, 46.47.55,17.
11... Second control circuit means.

Claims (1)

[Claims] 1. In an oil hot air machine that burns kerosene in a pot,
It responds in relation to the temperature within the pot and exhibits a first aspect for temperatures above a predetermined temperature. a temperature switch exhibiting a second mode when the temperature is below the predetermined temperature; the first mode of the temperature switch forming a prohibited state that disables the ignition operation of the ignition means; a first control circuit means for forming an inhibit release state that enables the ignition operation of the ignition means; a pulse generation circuit for selectively generating first and second trigger pulses by switch operation; a bistable switching circuit set to a first stable state by a first trigger pulse of the circuit and reset to a second stable state by said second trigger pulse; said first control circuit means in an uninhibited state; is formed, the ignition means performs an ignition operation in response to the first stable state output of the bistable switching circuit, and the ignition means causes the ignition operation to be performed in response to the second stable state output of the bistable switching circuit. 1. An automatic ignition device for an oil hot-air fan, characterized in that the automatic ignition device is equipped with a second control circuit means for performing an extinguishing operation such as cutting off fuel supply.