JPH0626644A - Combustion controller - Google Patents

Abstract

PURPOSE:To enable oxygen deficiency to be detected without cuasing a user to feel uneasy and uncomfortable. CONSTITUTION:The device provides: an automatic extinction timer means 10 for issuing a combustion stopping command at every predetermined period of time; an extension switch 8 for clearing the time counted by the automatic extinction timer means 10 to an initial value ; and an oxygen deficiency safety means 14 which forcibly changes over a combustion rate decided by a combustion rate deciding means 12 to a preset specific combustion rate by operating the extension switch 8 and then returns it to the combustion rate decided by the combustion rate deciding means 12 after the lapse of a predetermined period of time. Accordingly, the condition of oxygen deficiency is detected each time when the extension switch 8 is depressed and, moreover, a combustion rate at the time of depressing the extension switch 8 is weak combustion. Therefore, even in the case where the combustion rate increases, a user does not feel uneasy and uncomfortable due to an increase of noises because the combustion rate increases at the time of user's operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control device such as an oil fan heater.

[0002]

2. Description of the Related Art Generally, an indoor open type combustion heating equipment such as an oil fan heater uses indoor air as combustion air. Therefore, if combustion is continued for a long time in a closed room, an oxygen deficiency state occurs and abnormal combustion such as red fire occurs. It causes a situation where carbon monoxide is generated and human life is harmed.

Therefore, in this type of combustion equipment,
In order to avoid continuous use for a long time, for example, the combustion is stopped every 3 hours, and an extension switch is provided separately from the operation switch. When this extension switch is pressed, combustion is continued for another 3 hours. It is configured to ensure safety.

Further, as shown in FIG.
A frame rod 51 is provided outside, and when the combustion state is detected by the frame rod 51 and the output thereof reaches a predetermined level, an alarm or combustion is stopped as an oxygen deficiency state.

That is, a voltage is applied between the frame rod 51 installed in the combustion flame F and the burner case 52, the current value flowing through the combustion flame F is detected by using the rectification phenomenon of the combustion flame F, and When a preset oxygen deficiency abnormal level is reached according to the amount of combustion at that time, the combustion is stopped as an oxygen deficiency state.

However, in the above method, the commutation phenomenon of the frame rod 51 is good when the amount of combustion is high, such as during strong combustion, and a sufficient output can be obtained as the flame rod current, but the amount of combustion such as during weak combustion is large. When the value is low, the combustion flame F becomes small and it becomes difficult to obtain a sufficient output as the flame rod current. Therefore, it becomes difficult to determine whether or not the oxygen deficiency abnormal level has been reached, and there is a risk of causing a malfunction.

Therefore, in the recent oxygen deficiency detection device, when the amount of combustion is low such as during weak combustion, the amount of combustion is increased for a certain period of time to a level at which oxygen deficiency can be detected every certain period of time. Oxygen deficiency was determined by the flame rod current.

[0008]

However, in the above-mentioned conventional structure, although the combustion amount is compulsorily increased at regular intervals even though it is used in the weak combustion, the noise becomes high each time. There is a problem that the average room temperature rises and the user feels uncomfortable. Further, generally, there are few people who fully understand and use such a control procedure, so that there is a problem that anxiety is felt due to an increase in the combustion amount even though the combustion is weak.

The present invention has been made in view of the above points, and an object thereof is to make it possible to detect oxygen deficiency without feeling anxiety or discomfort.

[0010]

In order to achieve the above object, a combustion control device of the present invention sets an operation switch for instructing start and stop of operation of a combustion device and a desired temperature for the combustion device. A temperature setting switch, a combustion amount determining means for determining a combustion amount based on a signal from a room temperature sensor for detecting an indoor temperature, a combustion control means for controlling combustion by an output from the combustion amount determining means, and the combustion control A burner section that burns according to the output from the means, and a combustion state detection means that detects the combustion state of the burner section and outputs a combustion stop command when the output reaches a predetermined value that is set in advance,
Automatic fire extinguishing timer means for issuing a combustion stop command at predetermined time intervals, extension switch for clearing the time measured by the automatic fire extinguishing timer means to an initial value, and operation of the extension switch, determined by the combustion amount determining means The combustion amount is compulsorily switched to a specific combustion amount set in advance, and an oxygen deficiency safety means is provided to restore the combustion amount determined by the combustion amount determination means after a predetermined time.

[0011]

With the above-described structure, the present invention detects oxygen deficiency each time the extension switch is pressed, and the extension switch is within a predetermined time that is safe even at maximum or when combustion continues. Since it is pushed, it is possible to reliably detect oxygen deficiency.

Further, the amount of combustion when the extension switch is pressed is weak combustion, and even if the amount of combustion increases, the user increases it when he / she operates it. Disappear. Moreover, the rise in room temperature also leads to the promotion of ventilation by the act of opening the window,
It also leads to an increase in safety awareness.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a main body of a combustion device such as an oil fan heater, 2 is an operation part thereof, 3 is a control part for controlling the drive of the device, 4 is a burner part for performing combustion, 5 is a thermistor for detecting an indoor temperature, etc. Is a room temperature sensor.
Reference numeral 6 is an operation switch for instructing start and stop of combustion, 7 is a temperature setting switch for setting a desired temperature for the combustion equipment, and 8 is an extension switch, for example, to stop the combustion stop every 3 hours. Instead, it is for continuing combustion for 3 hours again.

When the operation switch 6 is turned on and a signal is input to the control unit 3, the load is driven according to a preset sequence, and the burner unit 4 starts combustion.

Next, the structure of the control unit 3 will be described. 9 is an operation judging means for judging ON / OFF of the operation switch, 10 is an operation start signal of the operation judging means 9 and a combustion continuation signal of the extension switch 8. With the automatic fire extinguishing timer means for starting the operation, a signal is output when, for example, 2 hours 45 minutes and 3 hours are timed. Reference numeral 11 is an automatic fire extinguishing alarm means for notifying the user of a signal of 2 hours 45 minutes and 3 hours passed from the automatic fire extinguishing timer means 10, and 12 is input of information of the room temperature sensor 5 and information of the temperature setting switch 7. A combustion amount determining means for determining the combustion amount, 13 is a combustion control means, and operation start / stop information from the operation determining means 9, information on the combustion amount determined by the combustion amount determining means 12, and an automatic fire extinguishing timer. The signal of 3 hours elapsed from the means 10 is input to control the load group to control the combustion of the burner section 4.

Reference numeral 14 is an oxygen deficiency safety means which operates by inputting information from the combustion amount determining means 12 and the extension switch 8. When the extension switch 8 is operated, the combustion amount determined by the combustion amount determining means 12 is determined. Is compulsorily changed to a preset combustion amount for a fixed time, and at the same time, timing is started and a compulsory combustion amount cancellation signal is sent to the combustion amount determining means 12 after a predetermined time.

Reference numeral 15 is a combustion state detecting means, and when the flame rod current value from the flame rod provided in the burner section 4 reaches a preset oxygen deficiency detection level according to the combustion amount,
A combustion stop signal is output to the combustion control means 13.

Next, the operation of the device configured as described above will be described with reference to the flowcharts of FIGS. 2 and 3. When the device is powered on and the control unit 3 is started, the device control is started according to the procedure of the control program shown in the flowchart of FIG.

First, at step 21, the operation discriminating means 9 judges whether or not the ON signal of the operation switch 6 is inputted. If the ON signal is inputted, the routine proceeds to step 22.
If the OFF signal is input, the process proceeds to step 31. In step 22, the output of the abnormality detection signal is confirmed to determine whether the combustion state determination means 15 has detected oxygen deficiency, and if the abnormality detection signal is ON, the process proceeds to step 32 to stop combustion. If the abnormality detection signal is OFF, it is determined that the combustion is normal and the routine proceeds to step 23.

In step 23, it is judged whether or not the extension switch 8 has been operated. If so, the process proceeds to step 24,
Clear the 3-hour automatic fire extinguishing timer 10 to the initial value and stop the timer. If it is not operated, the process directly proceeds to step 25. In step 25, it is determined whether or not the 3-hour automatic fire extinguishing timer 10 has been cleared to the initial value. If yes, the automatic fire extinguishing timer is started in step 26 and the process proceeds to step 27. 3-hour automatic fire extinguishing timer 1
If 0 is not cleared to the initial value, it is determined that the timer is being timed, and the process directly proceeds to step 27.

In step 27, it is judged whether or not the automatic fire extinguishing timer 10 for 3 hours has timed for 2 hours and 45 minutes. If the time has been counted, the routine proceeds to step 28, where the automatic fire extinguishing warning means 11 issues an alarm. If the time has not been measured, the process proceeds to step 33.

At step 29, it is judged whether or not the automatic fire extinguishing timer 10 for 3 hours has timed for 3 hours, and if it is timed, the routine proceeds to step 30, and if not, the routine proceeds to step 33. In step 30, the operation switch is turned off, the abnormality detection signal is turned on, or the automatic fire extinguishing is performed by measuring the time for 3 hours.
Signal to the burner unit 4 is turned off.

In step 31, since the OFF state of the operation switch has been determined, it is turned OFF to clear the abnormality detection signal. In step 32, since the combustion is stopped, the 3-hour automatic fire extinguishing timer 10 is cleared to the initial value and the timer is stopped.

Next, the operation of step 33 will be described with reference to the flowchart of FIG. First, in step 34, it is determined whether or not the weak combustion is being performed as the combustion amount information from the combustion amount determining means 12. If the weak combustion is being performed, the process proceeds to step 35, and if it is not the weak combustion, the process proceeds to step 37.

In step 35, it is judged whether or not the extension switch 8 is pushed. If it is pushed, the routine proceeds to step 36, and if it is not pushed, the routine proceeds to step 37. In step 36, the oxygen deficiency safety means 14 sends a signal for changing the combustion quantity to a specific level for oxygen deficiency detection to the combustion quantity determination means 12.

In step 37, the information of the room temperature sensor 5 is input, in step 38, the information of the temperature setting switch 7 is input, and in step 39, the combustion amount as the output of the combustion amount determining means 12 is determined.

In step 40, the combustion control means 13 controls the driving of the load group of the burner section 4 in accordance with the combustion amount determined in step 36 or 39. In step 41, the combustion state detection means 15 determines whether the flame rod output of the burner unit 4 has reached the oxygen deficiency level.
If the oxygen deficiency level has been reached, an abnormality detection signal is output to the combustion control means 13 to stop combustion, and if the oxygen deficiency level has not been reached, the combustion operation is exited in order to continue combustion.

The above embodiment is shown as an example of the present invention, and may have any configuration as long as it achieves the objects and effects of the present invention. For example, the control means is a microcomputer. However, it is also possible to use a circuit configuration capable of performing the same control as this, even if a microcomputer is not used.

Although the oxygen deficiency check is performed at the time when the extension switch is operated for 3 hours, any switch other than the extension switch may be used as long as it is related to the prevention of oxygen deficiency such as ventilation.

[0030]

As is apparent from the embodiments described above, the present invention detects oxygen deficiency each time the extension switch is pressed,
Moreover, since the extension switch is pushed within a predetermined time which is safe even at the maximum or even if combustion is continued, it is possible to reliably detect oxygen deficiency.

Further, the amount of combustion when the extension switch is pressed is weak combustion, and even if the amount of combustion increases, the user may feel anxiety or annoyance due to noise increase because it increases when he / she operates it. Disappear. Moreover, the rise in room temperature also leads to the promotion of ventilation by the act of opening the window,
It also leads to an increase in safety awareness.

[Brief description of drawings]

FIG. 1 is a block diagram of a combustion control device according to an embodiment of the present invention.

FIG. 2 is a flowchart explaining the operation of the combustion control device.

FIG. 3 is a flowchart showing a combustion operation subroutine of the same flowchart.

FIG. 4 is a front view of a burner portion of this embodiment and a conventional device.

[Explanation of symbols]

 4 burner section 6 operation switch 7 extension switch 8 temperature setting switch 9 operation determination means 10 automatic fire extinguishing timer means 12 combustion amount determination means 13 combustion control means 14 oxygen deficiency safety means 15 combustion state detection means

Claims (1)

[Claims] 1. A combustion switch based on signals from an operation switch for instructing start and stop of operation of a combustion device, a temperature setting switch for setting a desired temperature for the combustion device, and a room temperature sensor for detecting an indoor temperature. Combustion amount determining means for determining the amount, combustion control means for controlling combustion by the output from the combustion amount determining means, a burner portion for performing combustion according to the output from the combustion control means, and combustion of the burner portion A combustion state detecting means for detecting a state and outputting a combustion stop command when the output thereof reaches a predetermined value, an automatic fire extinguishing timer means for issuing a combustion stop instruction at every predetermined time, and the automatic fire extinguishing timer means for timing the time. The extension switch that clears the set time to the initial value, and the operation of the extension switch causes the combustion amount determined by the combustion amount determination means to be forcibly set to the specific combustion amount set in advance. A combustion control device comprising switching means and an oxygen deficiency safety means for returning to the combustion quantity determined by the combustion quantity determination means after a predetermined time.