JPS62123221A - Imperfect combustion detecting device - Google Patents

Abstract

PURPOSE:To detect the change of measuring strength with good accuracy and response even when the objective position of measuring of a flame is not set accurately by a method wherein a means to measure the strength of light having a specified wavelength in the flame is provided. CONSTITUTION:A substance 6, generating the light of specified wavelength in a frame generated by a burner 1, is provided in a condition that the tip end of the substance is positioned in the flame while a means 7 for measuring the strength of the light and a means 8 for deciding the condition of combustion by the comparison of the measured strength and a preset reference strength are provided. Accordingly, the strength of the light of specified wavelength is decreased when the oxygen concentration of combustion air from an inflow port 3 is reduced or the strength of the light of specified wavelength is increased when poor exhausting is generated due to the clogging of gaps between finned heating tubes 5c or the like, therefore, imperfect combustion may be detected to extinguish a burner 1 automatically by utilizing these phenomena.

Description

[Detailed Description of the Invention] [Industrial Application Field] Kinoe F+4 is used to detect (pre-empt) incomplete combustion of burners in various combustion equipment and to take safety measures such as stopping fuel supply. This invention relates to an incomplete combustion detection device.

[Conventional technology]

Typical conventional incomplete combustion detection devices are the thermocouple method and the flame rond method.

In other words, with the thermocouple method, a thermocouple is placed at the base end of the flame to detect incomplete combustion due to low measured temperatures due to flame lift, or to detect incomplete combustion due to a blockage in the exhaust passage. A thermocouple is placed at the point where high temperature gas flows in due to pressure increase.
Incomplete combustion is detected by the rise in measured temperature due to the inflow of high-temperature gas.

In addition, the flame rond method uses ions in the flame to flow a current, and detects incomplete combustion based on a change in the measured current value.

[Problem that the invention seeks to solve]

However, in either method, in order to perform accurate detection, it is necessary to provide the burner at an appropriate position commensurate with the burner and fuel, and the need for high placement accuracy is disadvantageous in terms of manufacturing.

In addition, the thermocouple method #: had a slow response, while the flame ront method Ua equipment was expensive, and in short, none of them were satisfactory in terms of manufacturing, cost, and performance.

An object of the present invention is to provide a completely new and excellent incomplete combustion detection device that can detect with good accuracy and responsiveness without requiring too high precision in terms of arrangement, and can be used at low cost. There is K.

[Means for solving problems]

The characteristic configuration of the present invention includes a means for measuring the original intensity of a specific wavelength in the fire and flame caused by the burner, and determining whether the intensity measured by the measuring means is in the normal combustion region or the incomplete combustion region. The safety means is provided with a means and an output means for automatically operating the safety means based on information from the determination means, and its functions and effects are as follows.

[For production]

In other words, as a result of experiments, light of a certain wavelength selected appropriately is
It was confirmed that the strength significantly decreased due to oxygen deficiency, and increased significantly as the exhaust passage became clogged.

And, even if you don't set the flame measurement target position with high precision or change settings strictly depending on the burner or fuel,
We have confirmed that changes in measured intensity can be detected with good accuracy and responsiveness.

Therefore, when incomplete combustion or a precursor thereof occurs in the flame of the burner, this is detected accurately and quickly by the determination means, and safety measures such as fuel cutoff and f= alarm are activated reliably and quickly by the output means. This can prevent tangles caused by incomplete combustion.

Furthermore, compared to the conventional frame iron method, the equipment cost can be sufficiently reduced, making it economically advantageous.

〔Effect of the invention〕

As a result, it has become possible to provide an incomplete combustion detection device that has good accuracy and responsiveness, is easy to install in combustion equipment, and is also advantageous in terms of equipment cost, making it possible to practically improve the safety of combustion equipment. It became so.

〔Example〕

Next, the 〇burner +l) shown in the drawing is placed in the cylindrical case (2), and the combustion air inlet +311k is in the F part of the case (2), and the combustion exhaust gas inlet is installed in the upper part of the case (2). An exhaust pipe (4) is formed, and a water supply pipe (5) is formed.
a), spiral heating '1 (5b), fin-added heat tube (5c
) and the hot water supply pipe (5d) are connected in that order to form an instantaneous water heater.

A substance (6) that generates a source of a specific wavelength is placed in the flame of the burner IL+ with its tip entering the flame. A means of determining by comparison with a set standard strength (
8), an incomplete combustion detection device equipped with an output means (10) that automatically closes a safety valve (9) in the fuel supply path to the burner fi+ based on the information from the determination means (8); It is.

In other words, if the oxygen concentration of the combustion air from the inlet (3) is low, the intensity of the light of the specific wavelength will decrease, and if the gap in the fin-added heat tube (5c) is clogged, poor exhaust will occur. , the original intensity of the specific wavelength increases, and by utilizing this phenomenon, incomplete combustion is detected (predicted) and the burner (1) is automatically extinguished.

The substance i8) that generates the specific wavelength is made of one or more salts or metal elements such as lithium, sodium, carithum, rubidicum, sesicum, calcicum, stronticum, baritum, copper, indium, and talicum.

The means (7) for measuring the original intensity of the specific wavelength is, for example, a photodiode, a phototransistor, a photocell,
Select from CdS cells or other suitable cells. Also,
Measurement means (7) is a filter that mainly follows a specific wavelength source.
[Another Example] Next, another example will be shown.

The burner il i may be for city gas, propane gas, petroleum, or any other fuel, and the type of combustion equipment to which the burner fil is attached does not matter.

The measuring means (7) may measure the source of a specific wavelength emitted by a source present in the fuel or combustion air.

In place of the safety valve (9), a set of buzzers, a warning device such as a lamp type, and other safety components can be installed on the output means 11Lll.
They may also be operated objects, and these objects are collectively referred to as safety means (9).

4 Simple degluing of drawings The drawing is a concept g illustrating an embodiment of the invention.

ill...Burner, (7)...Measurement means, (8)...Judgment means, (9)...
...Safety means, 1101... Output means.

Claims (1)

[Claims] Means (7) for measuring the intensity of light of a specific wavelength in the flame by the burner (1), and means for determining whether the intensity measured by the measuring means (7) is in the normal combustion region or the incomplete combustion region. (8), as well as an output means (
10) An incomplete combustion detection device comprising: