JPS5952723B2 - Combustor control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control circuit for a combustor, etc., and particularly aims to improve the automatic ignition timer configuration thereof.

The conventional combustor control circuit had a circuit configuration as shown in FIG. 4, and had the following drawbacks.

That is, after setting the time, the ignition timer motor 2' is energized from the contact 1-2 of the ignition timer contact 3', and after the set time, the ignition timer motor 2' is turned on.
3, the ignition timer motor 2' is de-energized, and the subsequent combustion control circuit T is started to be energized, thereby transitioning to the ignition and combustion state.

However, in this case, combustion continues after the ignition timer ignites the engine, which results in unnecessary fuel consumption when no one is using it, which goes against the grain of energy conservation.

In addition, especially in the case of an indoor supply/exhaust type combustor, problems such as oxygen deficiency may occur if the user does not notice.

The present invention improves the drawbacks of the conventional combustor equipped with a built-in ignition timer as described above, and further improves its usability.One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a power plug, 2 is an ignition timer motor, 3 is an ignition timer contact, 4 is a power lamp, 5 is a sheathed heater for preheating the vaporization section, 6 is a thermoswitch for detecting the heat of the vaporization section, and 7 is the combustion switch, 8a is the power transformer
Next coil, 8b is the secondary coil of the power transformer, 9 is the combustion air blower and pump motor, 10 is the convection blower motor, 11 is the ignition device, 12 is the flame rod for flame detection, 13 is flame detection 14 is a comparison amplifier of the timer circuit for misfire detection time; 15 is a transistor driven by the comparison amplifiers 13 and 14; 16;
is driven by transistor 15 and normally open contact 16a
17 is a relay having a normally open contact 17a, 18 is a contact for an anti-seismic automatic fire extinguishing system, and 19 is a temperature switch for preventing overheating that opens when the main body overheats.

Reference numeral 21 denotes a buzzer used as an example of alarm means, and this buzzer 21 is connected to the contact 5 of the ignition timer contact 3 via a switch 2a that is opened and closed by the ignition timer motor 2.

This switch 2a is closed by a cam (not shown) of the ignition timer motor 2, and specifically, it is closed approximately 5 minutes before the end of rotation of the ignition timer motor 2, and is closed approximately 2 minutes before the end of rotation of the ignition timer motor 2. It is now open to the public.

The circuit operation in the circuit configuration as described above will be explained below.

First, connect the power plug 1 to the outlet, and then turn the ignition timer knob 20 shown in Figure 3 to "on", and the ignition timer contacts 3 will have contacts 2-1 and 5-6 conductive as shown in Figure 2. In this state, the contact 2-5 is activated and the power lamp 4 is energized.

At the same time, electricity is supplied to the sheathed heater 5 through the contact E port of the thermoswitch 6 for preheating detection, and preheating of the vaporization section is started.

Then, the combustion switch 7 is manually closed, and when the temperature of the vaporizing section rises to a predetermined temperature and the thermoswitch 6 for preheating detection switches to the contact IHA, the power supply 1 to the lance-next coil 8a are energized, and the relay 17 is activated. Energized normally open contact 17
a is closed.

Further, the output of the comparison amplifier 14 remains Hi until the charging potential of the capacitor C reaches a predetermined potential.
N, the relay 16 is energized, and the normally open contact 16a is closed.

Then, the combustion air blower and pump motor 9. The convection blower motor 10° ignition device 11 is energized, fuel is supplied to the vaporizing section, it vaporizes, is ignited, and combustion begins.

If a flame is generated and current flows from the flame rod 12 to the burner K before the output of the comparator amplifier 14 changes from Hi to Lo after a set time during ignition, the output of the comparator amplifier 13 switches from LO to Hi.

Then, the driving of the L-transistor 15 is continued and a steady combustion state is entered.

Ignition combustion is performed as described above, but if you want to use the ignition timer to ignite, turn the ignition timer knob 20 in Figure 3 to the desired setting time in the range B, that is, how many hours from now you want combustion to occur. When turned in the direction of arrow P to match, contact 2-3 of ignition timer contact 3 as shown in the time chart in Figure 2.
．． 5-6 becomes conductive, and energization of the ignition timer motor 2 is started.

When the set time reaches range A, contact 2-3.5-4
becomes conductive, and the ignition timer motor 2 and sheathed heater 5
energization begins to flow through the circuits, and preheating of the vaporizing section begins.

If the combustion switch 7 is closed at this time, the preheating is complete and the state shifts to the ignition state.

After a certain period of time in range A has passed (approximately 1 hour), the ignition timer knob 20 will automatically turn to the "off" position, and this
Since the contacts 2-1 and 5-4 are brought into conduction by the top, the power to all the circuits is cut off, resulting in a stopped state.

Also, from about 5 minutes to about 2 minutes before this combustion stop operation, the switch 2a is closed as described above, so the buzzer 2
1 will sound to notify the user that combustion is about to stop.

At this time, if the user wants to perform continuous combustion, the user can turn the knob 20 to ``off'' and then turn it in the opposite direction again in the A range, or turn it to the ``1 person'' range. Since the temperature of the combustion chamber is maintained at a predetermined temperature, continuous combustion can be performed, which is extremely convenient.

In the above embodiment, the buzzer 21 is used as an alarm means, but a lamp may be used instead.

As described above, according to the present invention, the ignition timer stops the ignition after a certain period of time has elapsed.

This allows combustion to continue even when the user is not present, unlike conventional systems, and does not consume excessive amounts of fuel, reducing the amount of fuel consumed, which is highly effective in terms of energy conservation.

In addition, even if the user is not aware of the ignition due to sleep, etc., it will extinguish and stop after a certain period of time, making it possible to prevent oxygen depletion even in indoor air supply and exhaust systems, which is much more effective than conventional products. It is safe to use.

Furthermore, if the user wants to use the device continuously, the user can know when the combustion has stopped using the alarm means, so continuous combustion can be performed by operating the knob of the ignition timer, and the usability can be freely selected, which is very convenient.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of a combustor control circuit according to an embodiment of the present invention, Fig. 2 is a time chart 1 used to explain the operation of the control circuit, and Fig. 3 is the same control circuit. FIG. 4 is an electric circuit diagram of a conventional example. 2... Ignition timer motor, 3... Ignition timer contact,
5... Sheathed heater, 6... Thermo switch, 7.
... Combustion switch, 11... Ignition device, 20... Ignition timer knob, 21... Buzzer (alarm means).

Claims (1)

[Scope of Claims] 1. An ignition timer is provided that automatically operates to ignite combustion after a set time, and this ignition timer stops combustion after a certain period of time after the automatic ignition, and also stops combustion after a certain period of time after the automatic ignition. A control circuit for a combustor, characterized in that it drives an alarm means for notifying combustion stop before a certain period of time. 2. The combustor control circuit according to claim 1, wherein the notification by the alarm means is configured to be stopped before the combustion stop operation.