JPS604732A - Ignition timer display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ignition timer for a liquid fuel combustor or the like, and more particularly to a display means for indicating the operating status of the ignition timer.

Conventional configuration and its problems In general, the ignition timer of a combustor is activated after a set time elapses.
Or, at the set time, the combustion control circuit will start.
Combustion will start, but in order to increase safety, combustion will automatically stop approximately one hour after the start of combustion, and in order to burn continuously or burn again, you must cancel the timer operation. By requiring this to be done intentionally, combustion is avoided when the user is not present and the situation is unsafe.

Conventionally, the ignition timer that performs the above operations is often composed of a rotary mechanical timer using a synchronous motor.
For example, if you set the timer to 6 hours, combustion will start after 6 hours and stop after 1 hour.

However, recently, the combustion sequence of the combustor is often realized by a microcomputer (hereinafter referred to as "microcomputer"), and the ignition timer mentioned above has also come to be replaced by a part of the program built into the microcomputer. In the case of a type mechanical timer, it was possible to determine whether the timer was being set, combustion was in progress due to timer operation, or the state after one hour of combustion based on the rotational position of the knob, but the ignition timer could be determined by the microcomputer. It is not easy to distinguish between these movements.

In particular, after the set time elapses or the set time comes and combustion starts, it burns for a certain period of time (this is called "timer combustion").
The subsequent combustion stop period (referred to as ``1'') was not significantly different from the period until the set time elapsed or until the set time, and there was no possibility of mistaking it.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and includes a display means for displaying the operating status of the ignition timer, and also sets the time at which combustion starts or the elapsed time until combustion starts. Distinguish between the display state during the period from the time when the timer operation starts until the ignition timer operation is canceled (this is referred to as "timer operation") and the display state after the timer combustion period has elapsed during the timer operation period. The purpose of this is to clarify the operating status of the ignition timer.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a display means for displaying the operating state of the ignition timer, and changes the display contents during and after the timer combustion.

DESCRIPTION OF EMBODIMENTS As an example, a 24-hour timer is provided, and combustion is started when the current time matches the set time while the timer is running, and combustion is automatically stopped after one hour of timer combustion. The case of a combustion device will be explained as an example.

In Fig. 1, 1 is a power plug, 2 is a 24-hour timer, 3 is an operation switch, 3' is an ignition timer contact group, 4 is a power lamp, 6 is a sheathed heater for preheating the vaporizing section, and 6 is a vaporizing section child heat Thermo switch for detection, 7 is combustion switch, 81
L is the power transformer secondary coil, 8b is the power transformer secondary coil, 9 is the combustion air blower and pump motor,
10 is a motor for a convection blower, 11 is an ignition device, 12 is a flame rod for flame detection, 13 is a comparison amplifier for a flame detection circuit, 14 is a comparison amplifier for a timer circuit for non-ignition detection time, and 16 is the comparison amplifier. 13. A transistor driven by 14, 16 a relay that is driven by a transistor 15 and has a normally open contact 161L, 17 a relay that has a normally open contact 171L, 18 a contact of an anti-seismic automatic fire extinguishing system, and 19 a relay that is driven by a transistor 15 and has a normally open contact 161L. The temperature switch opens to prevent overheating, 2Q is a timer lamp that indicates when the timer is running, 21 is a blinking element, and 22 is a non-locking button switch. When pressed once, it is memorized in timer 2 for 24 hours and the timer operation status is activated. , and pressing it again cancels the timer operation state. Furthermore, although the conceptual operation of the 24-hour timer 2 is explained in this embodiment, it is actually composed of a microcomputer, etc., and is organically connected to the ignition timer contact group 3' through a signal line 23. .

To explain the operation using the above circuit configuration, first connect the power plug 1 to the outlet, and then start the 24-hour timer 2.
cents the current time and set time.

In normal operation, when the operation SW 3 is closed, the contact 2-1 of the ignition timer contact group 3' is in a conductive state, so the power lamp 4
is energized. At the same time, electricity is supplied to the sheathed heater 6 through the contact E port of the thermoswitch 6 for preheating detection, and preheating of the vaporization section is started. When the combustion switch 7 is closed and the temperature of the vaporizing section rises, the thermoswitch for preheating detection switches to EHA, the power transformer and the next coil 8a
The relay 17 is energized and the normally open contact 17a is closed. Still, the output of the comparator amplifier 14 becomes Hl, the transistor 15 is turned on, the relay 16 is energized, and the normally open contact 1 is turned on.
6a is closed. Then, the combustion air blower and pump motor 9. Convection blower IQ.

The ignition device 11 is energized to start ignition.

Then, the output of the comparator amplifier 14 during ignition becomes Ho after a set time. If a flame is generated and current flows from the flame rod 12 to the burner before the temperature changes, the output of the comparator amplifier 13 will increase. to H5. Then, transistor 16
continues to be driven and transitions to a combustion state.

Ignition combustion is carried out as described above, but if you want to perform automatic ignition using the ignition timer next time, press the bushing switch 22 once after closing the operation SW 3 to enter the timer operation state and ignition timer contact group 3' Contact 2-3 closes. At this time, the timer lamp 2o lights up when the contact 6-8 is in a conductive state, and since the contact 4-5 is in a non-conductive state, ignition combustion does not occur. When the current time has elapsed and coincides with the set time, the contacts 4-5 become conductive for the first time, energizing the circuits such as the sheathed heater 5, and preheating begins. If the combustion switch 7 is closed at this time, the combustion will shift to ignition combustion after the completion of preheating, resulting in timer combustion. At this point, the contacts 6-8 of the ignition timer group 3' remain conductive. When a fixed timer combustion period has elapsed, the ignition timer contact group 3' is switched from contact 6-8 to contact 6-7 in response to a signal from the 24-hour timer, and at the same time, contact 4-6 is opened. As a result, the power supply to the combustion circuit is cut off and the combustion circuit becomes stopped, while the timer lamp 2o changes from lighting to blinking due to the action of the blinking element 21'.

Effects of the Invention As described above, according to the present invention, the timer lamp is turned on during the timer operation, and after the timer burns, the lamp is turned off and blinks, so that the operating state of the ignition timer can be clearly identified. This makes it easier to understand the complicated operation and operation of the ignition timer, which has the effect of increasing the commercial value of the combustor.

[Brief explanation of the drawing]

The figure is a circuit diagram of an ignition timer display device according to an embodiment of the present invention. 2... 24 hour timer, 3... Operation SW, 3'... Ignition timer contact group, 4...
...operating lamp, 20...timer lamp,
21.--Blinking element.

Claims (4)

[Claims] (1) An ignition timer that automatically operates to start combustion after a set time or at a set time, and further stops combustion after a certain period of time, and a display means for indicating the operation of the ignition timer, An ignition timer display device, characterized in that the display means changes the display content at the time when the ignition timer stops combustion after a certain period of time. (2) The display means for indicating the operation of the ignition timer is equipped with an oscillation circuit, and starts combustion from the ignition timer set;
Claim 1 characterized in that a lit display or a blinking display is performed until the combustion is stopped after a certain period of time, and after the combustion has stopped, the display changes to a blinking display or a lit display. Ignition timer display device as described in section. (3) The display means is composed of a display body of at least two different luminescent colors, and the color changes from the first luminous color to the second luminescent color at the time when combustion is stopped after a certain period of time of the ignition timer. The ignition timer display device according to claim 1, characterized in that the ignition timer display device changes. (4) The ignition timer display device according to claim 1, wherein the display means changes the brightness of the display device when the ignition timer stops combustion after a certain period of time.