JPS63172818A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To prevent the malfunction of a combustion detector by providing a bottomed cylinder having smoothing holes at its bottom within a blast case which supplies combustion air, forming a part of the bottom part of the inner cylinder by a transparent plate, and providing smoothing holes in the transparent plate. CONSTITUTION:A large number of smoothing holes 5 are formed at the bottom part of an inner cylinder 4 so that air to be introduced into the inner cylinder 4 is distributed uniformly. Combustion air is mixed with a fuel supplied through a nozzle 6 and is ignited by an igniter 7, and forms a flame circumferentially uniform and stabilized by a stabilizer 8. Further, combustion air flowing via a blast route 10 passes through air holes 9 and is supplied to the flame stabilized by the stabilizer 8 to promote the combustion and to cause the burner to carry out a complete combustion. A part of the bottom part of the inner cylinder 4 is made of a transparent plate 12; smoothing holes are formed in the transparent plate 12. Thus, uniformity of air passing through the bottom part of the inner cylinder 4 and entering therein is not impaired, and allows the light of the flame formed in the front of the stabilizer 8 to permeate through the transparent plate 12, thus making it possible to sufficiently supply the light thereof to a combustion detector 13. Hence, even when the quantity of light incoming to the combustion detector may be changed more or less, the detector does not malfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid fuel combustion device installed in a small domestic petroleum water heater or the like.

2. Description of the Related Art Conventionally, as shown in FIG. 3, a liquid fuel combustion device of this type includes an inner cylinder 3 having a rectifying hole 2 at the bottom in a blower case 1, and a nozzle 4 and a nozzle in the inner cylinder 3. A stabilizer 5 is provided in front of the combustion apparatus, a large number of air holes 6 are provided in the inner cylinder 3 in front of the stabilizer 5, and an outer cylinder 7 is provided coaxially with the inner cylinder 3 to form a ventilation path outward. A combustion detection device 8 for detecting combustion using flame light was configured to be attached to the blower coos 1 facing the rectifying hole 20.

Problems to be Solved by the Invention However, with the above configuration, the flame light entering the combustion detection device 8 only enters through the gap in the rectifying hole 2, and the rectifying hole provided at the bottom of the inner cylinder 3 The holes 2 have a small diameter and are distributed in large numbers at the bottom of the inner cylinder 3, since it is necessary to uniformly send the combustion air sent from the blower coos 1 into the inner cylinder 3 in order to stabilize combustion uniformly. It is necessary to do so.

Therefore, the amount of flame light received by the combustion detection device 8 decreases, and if the combustion conditions etc. change and the flame state changes and the amount of light changes by 4, it may be detected as a misfire even though combustion is occurring. , which had the problem of malfunctioning.

The present invention solves these conventional problems and provides a liquid fuel combustion device that eliminates malfunction of the combustion detection device.

Means for Solving the Problems In order to solve the above problems, the liquid fuel combustion device of the present invention includes a bottomed cylindrical inner body having a rectifying hole at the bottom provided in the blower case that supplies combustion air. a cylinder, a fuel supply nozzle provided in the inner cylinder, a stabilizer provided in front of the nozzle, a number of air holes provided in the inner cylinder in front of the stabilizer, and coaxial with the inner cylinder. An outer cylinder is provided on the outside of the inner cylinder to form a ventilation path, a part of the bottom of the inner cylinder is made of a transparent plate, the transparent plate is also provided with the rectifying holes, and is opposite to the transparent plate. A combustion detection device is provided in the ventilation coos portion.

According to the present invention, with the above-described configuration, the flame light enters the combustion detection device not only through the rectifying hole but also through the transparent plate, so that the flame light can be sufficiently detected and the combustion condition is determined. It will no longer malfunction even if the amount of light changes, the flame condition changes, or the amount of light changes slightly.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG.
An arrow view is shown.

Reference numeral 1 denotes a blower motor that sends combustion air using a blower fan 2, and 3 a blower case that supplies combustion air, which has a bottomed cylindrical inner cylinder 4 having a number of rectifying holes 5 at the bottom. A fuel supply nozzle 6 and an ignition device 7 are provided in the inner cylinder 4, a stabilizer 8 is provided in front of the nozzle 6, and a large number of air holes 9 are provided in the inner cylinder 4 in front of the stabilizer 8. A ventilation path 1 is provided on the outside of the inner cylinder 4 coaxially with the inner cylinder 4.
The outer cylinder 11 is provided so as to form 0. Also, inner cylinder 4
A part of the bottom part is made of a transparent plate 12 (made of a material such as polycarbonate), and the transparent plate 12 is also provided with rectifying holes 5, and a combustion detection device 13 is installed in the ventilation case 3 facing the transparent plate 12. It is set up.

In the above configuration, the combustion air from the blower fan 2 and the blower motor 1 passes through the blower case 3 and is divided into air that passes through the bottom of the inner cylinder 4 and air that passes through the blower path 10.

At the bottom of the inner cylinder 4, a large number of rectifying holes 5 with small diameters are provided so that the air entering the inner cylinder 4 is evenly distributed and enters the inner cylinder 4. The distributed combustion air mixes with the fuel supplied from the nozzle 6, is ignited by the ignition device 7, and is formed by the stabilizer 8 to maintain a stable flame uniformly in the circumferential direction. Also, ventilation route 1
The combustion air passing through 0 passes through the air hole 9, is supplied to the flame held by the stabilizer 8, and promotes combustion.
Allow complete combustion.

A part of the bottom of the inner cylinder 4 is made up of a transparent plate 12,
Since the transparent plate 12 also has the rectifying holes 5, the uniformity of the air that passes through the bottom of the inner cylinder 4 and enters the inner cylinder 4 is not impaired.
By transmitting the light of the flame formed in front of the stabilizer 8 through the transparent plate 12, the combustion detection device 13 can be sufficiently detected.
This has the effect that even if the flame state changes due to changes in combustion conditions and the amount of light entering the combustion detection device changes somewhat, malfunction will not occur.

Effects of the Invention As described above, according to the liquid fuel combustion device of the present invention, it is possible to send sufficient flame light to the combustion detection device without impairing the uniformity of the air that passes through the bottom of the inner cylinder and enters the inner cylinder. Even if the flame state changes due to changes in combustion conditions, etc., and the amount of light sent to the combustion detection device changes, the combustion detection device will
Combustion can be detected and malfunctions can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 is a view taken along arrow A in FIG. 1, and FIG. 3 is a sectional view of a conventional example. 3...Blower case, 4...Inner cylinder, 5.
... Rectification hole, 6 ... Nozzle, 8 ...
・・Stabilizer, 9・・Air hole, 10・・・・
...Blowing route, 11... Outer cylinder, 12...
・Transparent plate, 13... Combustion detection device. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
Wind-shielding booth Figure 2 Figure 3

Claims (1)

[Claims] A bottomed cylindrical inner cylinder having a rectifying hole at the bottom provided in a blower case for supplying combustion air, a fuel supply nozzle provided in the inner cylinder, and a stabilizer provided in front of the nozzle; A part of the bottom of the inner cylinder, comprising a large number of air holes provided in the inner cylinder at a portion forward of the stabilizer, and an outer cylinder provided on the outside of the inner cylinder coaxially with the inner cylinder and forming a ventilation path. A liquid fuel combustion device comprising a transparent plate, the rectifying hole also provided in the transparent plate, and a combustion detection device provided in the blower case portion facing the transparent plate.