JPH0359333B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a combustion control device that controls operation using a timer and is mainly suitable for heating devices.

[Conventional technology]

In general, combustor operation is often configured to automatically start using a timer, but starting combustion and continuing combustion after that is not possible unless the user is away from the combustor. It was considered to be extremely dangerous.

For this reason, Japanese Patent Application Laid-Open No. 48-9552 and Publication No. 59-
As in Publication No. 14383, the combustion start and stop times are set in advance using a program timer, etc.
There is a configuration that prevents unattended operation by manually operating the continuation of combustion when it is necessary to continue combustion. Also, Jitsukō No. 59-41381 and Jitsukōsho
In Publication No. 59-41382, an alarm or confirmation signal is generated after combustion starts and before automatic extinguishment after a certain period of time has elapsed.
There are configurations that require manual operation.

[Problem to be solved by the invention]

All of these configurations require manual operation within a certain period of time or according to an alarm instruction, so if the operation is delayed, combustion will automatically be stopped and ignition must be performed again. A foul odor is likely to be generated during this ignition operation.

On the other hand, modern combustors are equipped with various safety devices, and accidents such as fires caused by automatic operation are almost non-existent. In order to deal with indoor air pollution and rise in room temperature, which tend to be particularly problematic, ventilation sensors and thermoswitches are commonly used to stop combustion in the event of an abnormality. It is not a good idea to repeat the ignition operation.

[Means for solving problems]

This invention provides a new timer device with excellent safety, which replaces the method of extinguishing the combustor after a certain period of time when the combustor is started using a timer. A timer device 2 is provided to start combustion of the burner 1, and the timer device 2 activates a safety circuit 3 at a predetermined time after the start of combustion of the burner 1. A command device 5 is provided to set the combustion mode to weak combustion.

Furthermore, in the above configuration, the safety circuit 3 that is activated during combustion in the burner 1 is provided with a stop device 6 that stops the function of the safety circuit 3 and returns to the normal combustion state.

[Effect]

The timer device 2 of the present invention allows the operator to set the ignition start time in advance, and when the ignition time is set and the timer device 2 is activated, the burner 1 automatically starts combustion when the set time comes. do.

By the way, the timer device 2 of the present invention is equipped with a second timer 8 specified in advance in addition to the first timer 7 that can be set by the operator as a timer function, and the second timer 8 is activated following the first timer 7. It's becoming like this. Then, when the set time of the second timer 8 comes, the combustion amount of the burner 1 during combustion is switched to weak combustion. Additionally, an alarm 4 is activated to notify the operator of this condition.

On the other hand, an alarm 4 can be used to switch the combustion amount of the burner 1 during combustion to weak combustion, and to notify the operator of this state.
The safety circuit 3 is equipped with a stop device 6, and if the stop device 6 is operated while the safety circuit 3 is operating, the operation of the safety circuit 3 can be forcibly stopped, the alarm 4 is stopped, and normal combustion is stopped. It seems that the amount of combustion has returned to that of the time.

[Explanation of Examples]

To explain this configuration with reference to the drawings, FIG. 1 shows an embodiment using a mechanical timer, and 1 is a burner;
Reference numeral 9 denotes a burner controller, and the burner 1 is attached with a fuel control device 10, a combustion air supply device, and an ignition device, and stable combustion can be performed by signals from the burner controller 9. The burner controller 9 is equipped with a temperature sensor 11 such as a high limit switch and a ventilation sensor 12 such as a sensor input for detecting indoor air and combustion exhaust gas.
The burner 1 performs stable combustion even under disturbance conditions.

13 is a main switch that supplies power to the burner controller 9; 2 is a timer device; and 3 is a safety circuit that is controlled by the timer device 2 together with the burner controller 9.

The main switch 13 is connected in series with a timer contact 14, and when the timer contact 14 is switched to a, the burner controller 9 is energized to start combustion when the main switch 13 is turned on.

When the timer contact 14 is switched to b, the burner controller 9 is not energized and the timer device 2
Among them, the first timer 7 is energized, and relay B is also energized.
15 is also energized. The relay B15 has contact b-
1, relay A16 is energized via
is self-held by the self-contact a-1, and makes the safety circuit 3 operational by the other contact a-2.

After the set time has elapsed, the first timer 7 switches the timer contact 14 from b to a to make the first timer 7 non-conductive and energizes the burner controller 9 to start combustion.

When the burner 1 is activated by the timer device 2, the safety circuit 3 is enabled by the contact a-2 of the relay A16, and when the burner 1 is activated, the second timer 8 of the timer device 2 is activated. Operate.

Since the second timer 8 closes the second timer contact 17 after the set time has elapsed, the safety function of the safety circuit 3 is activated.

The safety circuit 3 is equipped with an alarm 4 such as an LED lamp or a buzzer, and a relay D.
The relay D has the function of a command device 5 that acts on the fuel control device 10 of the burner 1 to fix the combustion amount to weak combustion. The activation of the alarm 4 indicates the cause of the weak combustion in the burner 1, and is used to distinguish it from weak combustion caused by a room thermometer or the like.

In addition, safety circuit 3 includes a push switch and relay C18.
A series circuit is attached, and the switch has the function of a stop device 6 that stops the operation of the safety circuit 3,
When the relay C18 is activated by the stop device 6, the contact c-1 de-energizes the relay A16 to release the self-holding, and the contact a-2 de-energizes the safety circuit 3, making it inactive.

This stop device 6 can be operated at any time after the set time of the first timer 7 ends, that is, after the burner 1 starts combustion, and if it is before the end of the set time of the second timer 8, the alarm 4 or the command device 5 The operation of the safety circuit 3 and the second timer 8 is stopped while the safety functions of the safety circuit 3 and the second timer 8 are not activated.

FIG. 2 is a block diagram when controlling using a microcomputer, and has the same functions as FIG. 1.

The operation is performed by key operation using a push button, and the timer device 2 sets the first time in advance and then starts counting the time in response to a timer ON command. This is done by counting the pulses from the reference oscillator and comparing them with a set time, and when the pulses reach a count corresponding to the first set time, the burner controller 9 is instructed to start combustion.
The ON command is issued and burner 1 starts combustion. Also, after the first set time has elapsed, the stop device 6 of the safety circuit 3
Detection of the timer release key is also started.

The timer device 2 continues counting even after the ON command to start combustion, and repeatedly compares the first set time with a second set time, for example, 60 minutes. When the pulse count corresponds to the set time, issue an ON command for safety circuit 3.

Based on this ON command, safety circuit 3 release judgment 1
9 is activated, and it is determined whether the stop device 6 is activated. If it is not pressed, the safety function of the safety circuit 3 is activated, and a flow rate command 5 that sets the combustion amount to weak combustion and an alarm command 20 that activates the alarm 4 are issued.

Thereafter, the process returns to the release judgment step 19 while maintaining the burner 1 at a weak combustion state, and the operation is repeated from the judgment whether the stop device 6 is working. When the stop device 6 is activated, the flow exits from this loop and is put on hold, the flow rate command 5 and the alarm command 20 are canceled, and the burner 1 enters the normal combustion state.

On the other hand, in a configuration in which the safety circuit 3 switches to weak combustion and activates the alarm 4, when the stop device 6 is not attached to the safety circuit 3, the burner controller 9
Flow rate command 5 for switching the fuel control 10 to weak combustion
The safety circuit 3 is put on hold while the alarm command 20 that activates the alarm device 4 is issued. When the operator wishes to switch to strong combustion for the burner 1 which has been switched to the weak combustion state, the operator can manually control the combustion amount of the burner 1, but in this operation the alarm 4 remains activated and an audible alarm is issued. Problems remain when continuous alarms occur, and the selection of the alarm device 4 becomes important. In the embodiment of the present invention, the safety circuit 3 is provided with a stop circuit 6 that stops the operation of the safety circuit, so that not only the burner 1 which has been switched to weak combustion is returned to normal combustion and the operation of the alarm 4 is stopped, but also the second timer 8, it becomes possible to stop the operation itself of switching to weak combustion during operation, which improves usability.

Also, various types of timer devices are currently used, but in the case of a program timer using a mechanical synchronous motor, it is costly to use two first timers 7 and two second timers 8 at the same time, as shown in Figure 1. However, by using a program timer that can set two times, a single timer can be used for both times, making it cheaper to manufacture.

In addition, as for the timer that counts electronic clock pulses, it is only necessary to provide the counting section in two places in the operation program, so even if the timer method can set two times, the first timer 7 and the timer 7 as shown in Fig. Even a timer system in which two timers 8 are set can be used at low cost.

〔effect〕

As described above, the burner 1 that starts combustion automatically by the timer device 2 of the present invention switches to weak combustion after a certain period of time regardless of the presence of the operator, unlike the conventional example. The fire extinguished automatically and had to be re-ignited, and the odor emitted during extinguishing and ignition is no longer emitted into the room.

In addition, if someone is present, you can manually switch to strong combustion if the room that has switched to low combustion becomes cold, and prevent unnecessary heating when no one is present or when low combustion is sufficient. It will be like that. In addition, by switching to weak combustion, the amount of combustion gas generated is reduced, and natural ventilation can be expected from the gap between doors. The problem has been resolved. Furthermore, in this invention, when the combustion mode is automatically switched to weak combustion, the alarm 4, such as a lamp or a buzzer, can be activated to notify the operator, making it easier to handle.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of the present invention, and FIG. 2 is a block diagram thereof. 1...Burner, 2...Timer device, 3...Safety circuit, 4...Alarm device, 5...Command device, 6...
Stop device, 7...first timer, 8...second timer.

Claims (1)

[Scope of Claims] 1. A timer device 2 is provided to start combustion of the burner 1 at a preset time, and the timer device 2 activates a safety circuit 3 at a predetermined time after the start of combustion of the burner 1. A combustor timer device characterized in that the circuit 3 includes a command device 5 for activating an alarm 4 and setting the combustion amount of the burner 1 to weak combustion. 2. The combustor timer according to claim 1, wherein the safety circuit 3 that is activated during combustion in the burner 1 is provided with a stop device 6 that stops the function of the safety circuit 3. Device. 3. The combustor timer device according to claim 1, wherein the timer device 2 is a mechanical program timer capable of setting two times or a timer using an electronic clock pulse counter. 4. The timer device 2 includes a first timer 7 that starts combustion of the burner 1, and a second timer 8 that starts operation after starting the combustion of the burner 1. timer device.