JPH0942653A - Combustion controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion controller which always enables using thereof in safety with higher security free from failure such as abnormal combustion even when disconnection or off-connection occurs in an adjusting means to the sea-level where a combustor is installed. SOLUTION: An off-connection detecting means 9 is provided to detect a resistance value for the adjustment of an adjusting means 5 to sea-level and an abnormal resistance value in case of disconnection or off-connection as change in a voltage value and compares the results with specified values to judge thereby accomplishing an adjusting to a sea-level and a detection of abnormality. The operation is stopped through a control circuit 1 when abnormality is detected to prevent abnormal combustion while displaying the abnormal condition on a display means 4. Thus, the details of the abnormality can be learned easily thereby enabling use in extreme safety with security.

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 for a heater, in which the air-fuel ratio can be manually adjusted according to the altitude.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2-136610, the oxygen concentration varies depending on the altitude of the place where the combustion device is installed. It was provided with an adjusting means for adjusting the amount of fuel oil and the amount of fuel oil according to the altitude so that good combustion can always be obtained regardless of the altitude of the place of use.

[0003]

By the way, in this conventional device, the adjusting means is composed of a variable resistor, and by varying the resistance value, the control unit including a microcomputer or the like burns the combustion amount according to the adjusted resistance value. Was changed to burn at an optimum air-fuel ratio according to the altitude, so if this adjustment means is disconnected or disconnected, the resistance value becomes infinite and the air-fuel ratio will be corresponding. However, if the combustion continues unknowingly as a cause of abnormal combustion, it will be extremely dangerous.

[0004]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, the configuration is such that combustion air supplied by a combustion fan and fuel oil supplied from an electromagnetic pump are used. In a burner which mixes at a burner portion and burns at a predetermined air-fuel ratio, an altitude adjusting means including a variable resistor for adjusting at least one of the combustion air amount and the fuel oil amount according to the altitude is further provided. The altitude adjusting means is provided with a disconnection detecting means for detecting disconnection or disconnection of the altitude adjusting means, stopping the operation, and displaying the abnormality on the display means.

[0005]

When the combustion device is installed, the oxygen concentration in the atmosphere differs depending on the altitude of the installation location.
Is set to a variable resistance value according to the altitude which is set in advance, the rotation speed of the combustion fan 2 increases by a predetermined value, and the decrease in oxygen concentration is eliminated by increasing the combustion air amount, It is designed to always obtain good combustion even at high altitudes.

On the other hand, when the altitude adjusting means 5 is disconnected or disconnected, the resistance value becomes infinite, and the deviation detecting means 9 compares this resistance value with the reference value, and when it is above the reference value, it is judged as an abnormal state. While stopping the operation, an abnormality is displayed on the display means 4 to prevent abnormal combustion and to ensure safety.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A combustion control device according to the present invention will be described below with reference to an embodiment shown in the drawings. A control circuit 1 includes a combustion fan 2 for supplying combustion air and an electromagnetic pump 3 for supplying fuel oil.
And the display means 4 consisting of four 7-segments, respectively.

Further, in this control, the supply amount of the constant air-fuel ratio is preset and stored by the combustion amount determined by the deviation value between the room temperature and the set temperature, and the combustion fan 2 and the electromagnetic pump 3 are driven accordingly. To control.

Further, the display control of the display means 4 is to display a clock when not burning, and to display a room temperature and a set temperature when burning in a burner section (not shown), and a timer operation. Sometimes the set time or the remaining time is displayed, and when an abnormal state is detected, the display of "E1" to "E9" is displayed according to the content of the abnormality.

Reference numeral 5 is an altitude adjusting means composed of a variable resistor 6 and a bypass line 8 connected in parallel with the variable resistor 6 for directly inputting a reference voltage 7, and is a scale marked in increments of 100 m from 0 to 1500 m (see FIG. It is preset so that the resistance value according to the altitude can be obtained by manually aligning the finger line of a knob (not shown) with (not shown), and the variable resistor 6 may be disconnected. Alternatively, when the connection is disconnected, the reference voltage 7 is directly input via the bypass line 8.

Reference numeral 9 is a deviation detecting means for receiving the output signal from the altitude adjusting means 5, and detects the resistance value of the variable resistor 6 as the voltage value of the reference voltage 7 passing through the variable resistor 6 and stores it in advance. The voltage value is compared and judged, and the result is output to the control circuit 1 to increase the rotation speed of the combustion fan 2 to a predetermined value and change the air-fuel ratio according to the altitude.

Further, the disconnection detecting means 9 is provided with a bypass line 8 when the variable resistor 6 of the altitude adjusting means 5 is disconnected or disconnected.
The reference voltage directly input via the reference voltage is compared with the reference value, an abnormal signal is output to the control circuit 1 when the reference value is exceeded, and the operation is stopped via the control circuit 1. The display of "E9" for notifying the abnormality of No. 5 is performed.

Further, the control circuit 1 and the disconnection detecting means 9 are composed of one microcomputer 10 having functions such as comparison, calculation, storage and timer.

Next, the operation of this embodiment will be described. Now, after installing the combustion device, first turn on the power source before combustion, operate the altitude adjusting means 5 usually provided in a less noticeable position such as the back of the device, and adjust the altitude of the installation place of this device with a knob. By adjusting them, the control circuit 1 increases the rotation speed of the combustion fan 2 by a certain level so as to compensate for the decrease in the oxygen concentration due to the altitude, so that the air-fuel ratio during combustion is set to the optimum value for the altitude. Therefore, good combustion is always obtained regardless of the installation location of the device.

When the variable resistor 6 of the altitude adjusting means 5 is disconnected or disconnected, the disconnection detecting means 9 receives the reference voltage 7 inputted via the bypass line 8 and outputs an abnormal signal to the control circuit. By outputting to 1, the combustion is stopped during the combustion, the operation instruction is not accepted during the non-combustion, and both are in the operation stop state. Further, "E9" is displayed on the display means 4. The user and the serviceman are informed that the altitude adjusting means 5 is abnormal, and abnormal combustion is prevented in advance to ensure safety, and the user can always use it with peace of mind.

[0016]

In summary, the present invention relates to the one in which the combustion air supplied by the combustion fan and the fuel oil supplied from the electromagnetic pump are mixed in the burner section and burned at a predetermined air-fuel ratio. Equipped with an altitude adjusting means composed of a variable resistor for adjusting at least one of the combustion air amount and the fuel oil amount according to the altitude, and further detecting disconnection or disconnection of this altitude adjusting means, stopping the operation and displaying it on the display means. Since it is equipped with a disconnection detecting means for displaying this abnormality, good combustion can be performed according to the altitude, and even if the altitude adjusting means is disconnected or disconnected, the operation is stopped and abnormal combustion occurs. It can be prevented in advance, and this abnormal state can be accurately notified by the display means, which is always safe and can be used with peace of mind.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Control Circuit 2 Combustion Fan 3 Electromagnetic Pump 4 Display Means 5 Elevation Adjustment Means 6 Variable Resistance 9 Detaching Detection Means

Claims (1)

[Claims] 1. A method in which combustion air supplied by a combustion fan and fuel oil supplied from an electromagnetic pump are mixed in a burner section and burned at a predetermined air-fuel ratio, the amount of combustion air or fuel oil Equipped with altitude adjusting means consisting of a variable resistor that adjusts at least one of the amounts according to the altitude, and further detects disconnection or disconnection of this altitude adjusting means,
A combustion control device characterized in that it is provided with a disconnection detecting means for stopping the operation and displaying the abnormality on the display means.