JPS6229804Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control circuit for a combustor, and in particular 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, the ignition timer contact 3' contacts 1-2 to energize the ignition timer motor 2' after setting the time, and after the set time, switches to 1-3 to energize the ignition timer motor 2'.
At the same time, the energization to the combustion control circuit T was started, and the ignition/combustion state was entered.

However, in this case, combustion continues after automatic ignition with an ignition timer, which results in unnecessary fuel consumption when no one is using it, which goes against the energy-saving era. In addition, especially in the case of an indoor supply/exhaust type combustor, there is a possibility that problems such as oxygen deficiency may occur if the user is not aware of this.

The present invention improves the drawbacks of the conventional ignition timer built-in combustor and improves its usability.An 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 preheating of the vaporization section, and 7 is a Combustion switch, 8a is the power transformer primary coil, 8b is the power transformer secondary coil, 9 is the combustion air blower and pump motor, 1
0 is the convection blower motor, 11 is the ignition device, 1
2 is a flame rod for flame detection; 13 is a comparison amplifier of the flame detection circuit; 14 is a comparison amplifier of the timer circuit for non-ignition detection time; 15 is the comparison amplifier 13;
transistor 14 driven by transistor 16, transistor 15 driven by transistor 15, normally open contact 16
17 is a relay with a normally open contact 17a, 18 is a contact of an anti-seismic automatic fire extinguishing system, 19
is a temperature switch to prevent overheating that opens when the main unit overheats.

A buzzer 21 is used as an example of an alarm, and is connected to the contact 8 of the ignition timer contact 3 via a thermoswitch 22 that closes when the room temperature reaches a predetermined temperature (for example, 15° C.).

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. state, and the power lamp 4 is energized via the contact 2-5. At the same time, electricity is supplied to the sheathed heater 5 via the contacts E-RO of the thermoswitch 6 for preheating detection, and preheating of the vaporization section is started. Then, manually close the combustion switch 7,
After that, when the temperature of the vaporizer rises to a predetermined temperature and the thermo switch 6 for preheating detection switches to contact I-HA,
The power transformer primary coil 8a is energized, the relay 17 is energized, and the normally open contact 17a is closed. Further, the output of the comparator amplifier 14 becomes Hi until the charging potential of the capacitor _C1 reaches a predetermined potential, and the transistor 15 is turned on, the relay 16 is energized, and the normally open contact 16a is closed. Then, motor 9 for combustion air blower and pump, motor 1 for convection blower
0, the ignition device 11 is energized, fuel is supplied to the vaporization section, the fuel is vaporized and ignited, and combustion is started. And during this ignition comparison amplifier 1
If a flame occurs and current flows from the flame rod 12 to the burner before the output of the comparator 4 changes from Hi to Lo after the set time, the output of the comparator 13 changes from Lo to Hi.
Switch to. Then, the driving of the transistor 15 is continued and the combustion state shifts to a steady combustion state.

Ignition combustion is performed as described above, but when automatically igniting with the ignition timer, move 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 P direction to match, contacts 2-3 and 5-6 of the ignition timer contact 3 become conductive, and energization of the ignition timer motor 2 is started, as shown in the time chart of FIG.

After the set time has elapsed, when the range A is reached, the contact becomes 2-
3, 5-4, and 7-8 are brought into conduction, energization begins to flow to circuits such as the ignition timer motor 2 and the sheathed heater 5, and preheating of the vaporizing section begins. If the combustion switch 7 is closed at this time, the ignition state will be entered after preheating is completed. Further, when the room temperature reaches approximately 15° C. after this ignition, the thermoswitch 22 closes, causing the buzzer 22 to sound, thereby waking up the sleeping user. Note that the user can also turn off the buzzer 22 using the switch 23. In addition, the buzzer 22 automatically turns the ignition timer knob 20 to the "off" position after a certain period of time in the A range has passed even if the user does not wake up, so that the contacts 2-1 and 5-4 are conductive and the contacts 7- 8 is open, power to all circuits is cut off and the circuit is in a stopped state.

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, the alarm can be activated by an alarm after the ignition, and even if the user does not wake up, the fire will be extinguished and stopped after a certain period of time, so even if the indoor air supply/exhaust type is used, oxygen deficiency will not occur. It is extremely safe compared to conventional products.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram of a combustor control circuit according to an embodiment of the present invention, Fig. 2 is a time chart used to explain the operation of the control circuit, and Fig. 3 is an outline of the control circuit. The front view and FIG. 4 are electrical circuit diagrams of a conventional example. 2... Ignition timer motor, 3... Ignition timer contact, 5... Sealed heater, 6... Thermo switch, 7... Combustion switch, 11... Ignition device, 2
0...Ignition timer knob, 21...Buzzer (alarm), 22...Thermo switch.

Claims (1)

[Scope of utility model registration request] The ignition timer is equipped with an ignition timer that automatically operates to start combustion after a set time, and this ignition timer issues an alarm when the room temperature reaches a predetermined temperature after the automatic ignition. A combustor control circuit characterized by stopping combustion after a certain period of time.