JPH0875158A - Hot air heater - Google Patents

Abstract

PURPOSE: To enhance a handling ability by allowing a control circuit to recover and continue a combustion operation hitherto being executed if an ON operation is performed after an OFF operation is carried out carelessly not based on a clear intention to extend the operation. CONSTITUTION: This invention relates to a case when an OFF-pushbutton switch 3 is operated during combustion operation, and what is more, during the elapse of a specified time after the switchine-off, time counting is still continued without clearing a predetermined combustion time. Or the time counting is temporarily suspended and held continuously. When an ON-pushbutton switch 2 is operated within a specified time, a control circuit 5 does not assume the above operation as a start signal of a new operation and controls a fuel solenoid valve 8 and a sparker 7 and starts the supply of fuel to the burner 9. More specifically, this construction does not treats the operation as similar to the case when an extension pushbutton switch 4 is operated, but simply continues the previous operation being hitherto executed and puts off the burner 9 at the point of time when the predetermined time has elapsed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater such as an oil fan heater or a gas fan heater that discharges combustion exhaust gas into a room for heating, and particularly improves a combustion time control circuit. It is a thing.

[0002]

2. Description of the Related Art A warm air heater, a so-called fan heater, which discharges combustion exhaust gas into a room, gradually reduces the oxygen concentration in the room air (at the same time, carbon dioxide when it is continuously operated in a closed room). However, in the worst case, there is a risk that carbon monoxide will develop into a large amount of carbon monoxide, which may even cause fatal damage to the occupants.

Therefore, in order to avoid this kind of danger,
It has been designed to stop the operation after a certain period of time.

By adopting this operation control, it is possible to cut off the possibility of occurrence of a serious accident, but the operation is always stopped after a certain period of time, resulting in inconvenience in terms of usability. In other words, even if the person in the room changes the indoor air at the end of a certain period of time and the operation is no longer required, the operation will be stopped. There was the trouble of having to perform a driving start operation.

In order to improve this difficulty, it is popular to provide a driving extension mechanism (driving extension button) so that when it is operated, the driving is renewed and extended for a certain period of time again from that point. It was way.

[0006] The above-mentioned driving extension mechanism (driving extension button)
As shown in FIG. 1, "ON button 2" for starting operation and "OFF button 3" for stopping operation are provided for
You can see that the "extension button 4" is arranged so as to line up with.

[0007]

In any of the above-mentioned conventional examples, if a predetermined button is operated during operation to give an instruction to extend the operation, heating for a limited time is resumed from that point. As operation continues, as long as the operation is extended each time the room is ventilated, it will not be inconvenienced in terms of usability, and will also be free from the risk of developing a serious accident such as carbon monoxide poisoning. It is a fact that the effectiveness of being done has increased.

[0008] However, regarding the operation including the operation of the buttons, that is, the erroneous operation, the operation control which does not reflect the intention of the operator may be started depending on the operation method.

In the case of the example of FIG. 1, what happens is that the oil fan heater is operated after the off button 3 is operated during the operation before the end of the fixed time and the stop of the operation is instructed. If the ON button 2 is operated again while the flame still remains in the burner 9, the limited heating operation for a certain period of time is started from that point, just as when the extension button 4 is operated. There was something that would end up. That is, the control circuit 5 has determined that there is a new operation start command.

In this case, the problem is that the "extension button 4" is operated even when the "on button 2" is operated, although the "extension button 4" is provided as a dedicated operation button for extending the driving. That is, the control circuit performs the same operation as when is operated.

Since the driving on / off buttons 2 and 3 and the extension button 4 are arranged side by side, it is logical that further extension of the driving for a certain period of time is realized only by operating the extension button 4. Even if the continuation of the operation is executed by the re-operation of the input button 2, it is easier to understand that it is the last continuation of the operation without updating the operation time.

In this way, if the ON button 2 is operated while the burner 9 is still in the combustion operation immediately after the OFF button 3 is operated, the predetermined time until then is cleared and a new constant time is reached. The operation based on
The same operation as when the dedicated button provided under the name of operation extension was operated was started, causing considerable confusion.

Further, as in the case of the gas fan heater,
In a heater in which combustion of the burner 9 stops in a relatively short time when the button 3 is inadvertently operated, even if the button 2 is operated suddenly, operation based on a new fixed time starts. It was extremely inconvenient because there was no way to correct an inadvertent operation called an inadvertent operation.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a fuel combustion means for burning fuel and a fuel supply control for controlling the supply of fuel to the fuel combustion means. Means, ignition means for igniting the fuel supplied to the fuel combustion means, operation start operation means for instructing the start of heating operation over a predetermined first time, and instructing stop of operation Operation stop operating means of
Driving extension operating means for instructing extension of the operation over a second predetermined time, and fuel supply control means and ignition means when the operation start operating means is operated to burn fuel with fuel. Supplying the fuel to the fuel combustion means by controlling the fuel supply control means after igniting the supplied fuel and continuing the started combustion for a predetermined first time. If the operation extension operating means is operated while the combustion is being performed for a predetermined first time, the combustion operation of the fuel combustion means is continued and updated from that point. After the lapse of a predetermined second time, the fuel supply control means is controlled to stop the supply of fuel to the fuel combustion means, and after the operation stop operation means is operated, a predetermined third Luck over time When the start operation means is operated, the fuel supply control means and the ignition means are controlled to start combustion, and the preset first or second preset time before the operation stop operation means is operated. The warm air heater is constituted by the control means for controlling the fuel supply control means to stop the fuel supply to the fuel combustion means when the time has elapsed.

Further, for the control means, during a predetermined third time after the operation of the operation stop operating means elapses, a predetermined first or predetermined value that has been set until then The second burning time was maintained.

[0016]

In this structure, when the operation start operation means is operated to start the heating operation, the fuel supply control means and the ignition means are controlled to supply the fuel to the fuel combustion means, and the supplied fuel is supplied. After the ignition is started and the combustion started thereby is continued for a predetermined first time, the fuel supply control means is controlled to stop the supply of fuel to the fuel combustion means. When the operation extension operating means is operated during the combustion that is being performed for one time, the predetermined second predetermined value updated from that time while the combustion operation of the fuel combustion means is continued. After a lapse of time, the fuel supply control means is controlled to stop the supply of fuel to the fuel combustion means. Further, after the operation stop operation means is operated, the operation start operation means is operated while a predetermined third time, which is a predetermined time measured from the time when the operation stop operation means is operated, has elapsed. In this case, the fuel is controlled when the fuel supply control means and the ignition means are controlled to start combustion, and the fuel is supplied at the time when a preset first or second preset time has elapsed before the operation stop operation means is operated. The supply control means is controlled so that the fuel supply to the fuel combustion means is stopped.

As a result, even if the operation stop operation means is inadvertently operated, if the operation start operation means is operated within the predetermined third time, the operation stop operation is performed. Combustion will continue in the form of filling the remaining time left before the operation of the means.

Specifically, the control means is configured such that, during the predetermined third time period after the operation stop operation means is operated, the control means is set to the predetermined first or second predetermined time. The combustion time is continued without being cleared, either by continuing the time measurement or by stopping the time measurement, and when the operation start operating means is operated within the predetermined third time, the fuel supply control means and Control the ignition means to start the combustion and the combustion operation of the fuel combustion means,
Further, the control of the fuel supply control means is continued so as to complete the preset time set in advance before the operation stop operation means is operated, and the fuel supply control means is controlled when the predetermined time has elapsed. Then, the fuel supply to the fuel combustion means is stopped.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. The present invention is an improvement of the operation of the control circuit, and since there is basically no change in FIG. 1 used in the description of the conventional example, it will be described using FIG.

In FIG. 1, reference numeral 1 is an operation panel of a warm air heater such as an oil fan heater or a gas fan heater, and 2 is a part of the operation panel for heating for a predetermined first time. An input button for generating an operation start signal, an off button 3 for generating an operation stop signal, and an extension button 4 for generating an extension signal for heating operation over a predetermined second time. The time set by the ON button 2 and the extension button 4 is 3 hours in common. 5 is a control circuit that takes in signals from these buttons, 6 is a flame sensor that detects the presence or absence of flame, 7 is a sparker that ignites fuel, 8 is a solenoid valve that opens and closes the fuel supply circuit, and Reference numeral 9 is a burner in which the frame sensor 6 and the sparker 7 are incorporated and fuel is supplied through the fuel solenoid valve 8.

The operation of the example shown in FIG. 1 will be described.

When the input button 2 is operated, the control circuit 5 activates the fuel solenoid valve 8 to start the supply of fuel to the burner 9 and also activates the sparker 7 to ignite the fuel. After that, when it is confirmed through the flame sensor 6 that flames are present in the burner 9, heating and combustion are started for a predetermined time (3 hours). And 3
When the time has passed, the fuel solenoid valve 8 is closed to stop the combustion. When the off button 3 is operated during the heating operation for 3 hours, the fuel electromagnetic valve 8 is immediately closed at that point to stop the combustion. Further, when the extension button 4 is operated during the heating operation, the remaining time of 3 hours which is already set and executed without interrupting the combustion operation is updated to a predetermined time (3 hours). Then, the combustion operation is continued.

In this embodiment, the point to be noted is that the off button 3 is operated during the combustion operation, and it is set until the predetermined time, for example, 5 seconds, elapses thereafter. However, the predetermined burning time (3
If the ON button 2 is operated within the predetermined time, the control circuit 5
It is not considered that the start signal of the new operation is generated, and controls the fuel solenoid valve 8 and the sparker 7 to start the fuel supply to the burner 9, that is, the same as when the extension button 4 is operated. The fuel solenoid valve 8 is controlled at the time when the preset 3 hours that have been set before the OFF button 3 is operated are passed without simply handling the operation and simply continuing the previous operation that has been executed up to that point. That is, the fuel supply to the burner 9 is stopped.

As a result, even if the inadvertent cut-off operation is performed, the original operation schedule can be restored without confusion and the operation can be completed as scheduled.

[0025]

As described above, according to the present invention, the control circuit is simply operated if the operation is turned on within a predetermined time after the turning operation is accidentally performed without being based on the clear intention of the extension operation. There is no need to worry about the unexpected extension of the combustion time being set because the combustion time is not updated, just by recovering and continuing the combustion operation that has been executed up to that point. As a result, it was possible to realize a hot air heater with excellent handleability.

[Brief description of drawings]

FIG. 1 is a control block diagram of a warm air heater showing an embodiment (also a conventional example) of the present invention.

[Explanation of symbols]

 1 Operation Panel 2 On Button 3 Off Button 4 Extension Button 5 Control Circuit 6 Frame Sensor 7 Spurker 8 Fuel Solenoid Valve 9 Burner

Claims (2)

[Claims] 1. A fuel combustion means (9) for burning fuel
A fuel supply control means (8) for controlling the supply of fuel to the fuel combustion means, an ignition means (7) for igniting the fuel supplied to the fuel combustion means, and a predetermined first time. Start operation means (2) for instructing the start of the heating operation over a period of time, operation stop operation means (3) for instructing the stop of the operation, and extension of the operation for a predetermined second time period. Operation extension operation means (4) for instructing
When the operation start operation means is operated, the fuel supply control means and the ignition means are controlled to supply the fuel to the fuel combustion means, and the supplied fuel is ignited to start the combustion. After continuing for a predetermined first time, the fuel supply control means is controlled to stop the supply of fuel to the fuel combustion means, and also for a predetermined first time. When the operation extending operation means is operated during combustion, the combustion operation of the fuel combustion means is continued, and the predetermined second time updated from that time is elapsed and the aforesaid The fuel supply control means is controlled to stop the supply of fuel to the fuel combustion means, and the operation start operation is performed after the operation stop operation means is operated and during a predetermined third time period. Means When it is produced, the fuel supply control means and the ignition means are controlled to start combustion, and the first or second preset time which is preset before the operation stop operation means is operated. A warm air heater comprising: a control unit (5) for controlling the fuel supply control unit to stop the fuel supply to the fuel combustion unit when a certain time has elapsed. 2. The control means, during the elapse of the predetermined third time period after the operation stop operation means has been operated, the predetermined first part that has been set until then. Alternatively, the warm air heater according to claim 1, wherein the second combustion time is maintained.