JPH01302011A - Combustion device - Google Patents

Abstract

PURPOSE:To prevent a leakage of mixture gas and enable an annular flame blown at one side to be formed by a method wherein one end of a circular pipe is closed, the other end of the pipe is opened, a slit hole is formed at an inner circumferential surface of the circular pipe near its closed end in a tangential direction and at the same time the opened end is provided with a metering part having a smaller diameter than that of the circular pipe. CONSTITUTION:A circular pipe 1 acting as a combustion chamber has its one end closed to form a closed end 2. The other end of the pipe is applied as an opening end 3. The circular pipe 1 has a slit hole 4 formed to occupy near the closed end 2 in a substantial tangential direction at an inner circumferential surface 5 and at the same time an opening end 3 thereof is provided with a smaller metering part 6 than an inner diameter of the circular pipe 1. With this arrangement, the mixture gas fed from the supplying pipe 8 is blown from the slit hole 4 toward an inner circumferential surface of the circular pipe 1 in a tangential direction to form a helical and annular flame 9. One of the flames is stopped by the closed end 2 of the circular pipe 1 and extended to the other flame in an annular form. This annular flame 9 may abut against the outlet end 3 so as to form a flame of which flame end is closed at an outlet. With this arrangement, it is possible to prevent a leakage of the mixture gas and form the annular flame blown at one side.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a combustor for domestic use.

BACKGROUND OF THE INVENTION Recently, there is a swirl-type elongated flame burner that has been academically found to be optimal for flame observation. This burner uses a circular tube with a circular cross section like this, and by ejecting a mixed gas from the tangential direction of the circular cross section, a substantially concentric annular flame is formed inside the circular tube along the circular tube. The exhaust gas flows on the inner side of the flame, and the mixed gas flows on the outer side of the flame, swirling toward both ends of the tube.

Problems to be Solved by the Invention As mentioned above, as a uniform annular flame is formed as the flame swirls, it is good for flame research, but practical application was completely unthinkable because the mixed gas leaks from both ends. .

The present invention solves the above problems by applying the principle of a swirl-type elongated flame burner, preventing leakage of mixed gas, and providing a configuration that is easy to use in practice.

Means for Solving the Problems In order to solve the above problems, the combustor of the present invention includes a circular tube having one end closed and the other end open, with a slit extending tangentially to the inner circumferential surface of the circular tube near the closed end. The hole is squeezed, and a constriction part having a diameter smaller than the diameter of the circular tube is provided at the open end, and a mixed gas rectifying part and a mixed gas supply pipe are provided in communication with the slit hole.

Function: According to the present invention, the supplied mixed gas is blown out from the slit hole in the tangential direction toward the inner surface of the circular tube to form a swirling annular flame. One side of this flame is stopped at the closed end of the circular tube and extends in an annular manner to the other side. This annular flame hits the constriction at the outlet end and forms a flame at the outlet with the flame end closed. This prevents leakage of the mixed gas and forms an annular flame with one side blown out.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1st
In the figure, reference numeral 1 denotes a circular tube serving as a combustion chamber, one end of which is closed to form a closed end 2, and the other end is an open end 3. This circular tube 1
The slit hole 4 is provided close to the closed end 2 so as to be substantially tangential to the inner circumferential surface 5, and the open end 3
is provided with a constricted portion 6 having a smaller diameter than the inner diameter of the circular tube 1. It is desirable that the aperture part 6 is narrower than the opening end 3 and has parallel straight parts. This throttle part 3 varies depending on the combustion amount and the diameter of the circular tube 1, but the diameter of the circular tube 1 is 415 to 1.
/3 is desirable. Further, the slit hole 4 communicates with a mixed gas rectifying section 7 having passages of approximately the same size, and further communicates with a mixed gas supply pipe 8. Here, the relationship between the slit hole 4 and the mixed gas rectifier 7 is to rectify the mixed gas from the supply pipe a so that it is uniformly blown out from the slit hole 4 in a spiral shape. 9 is a flame formed in an annular shape.

FIG. 2 shows the combustor of the present invention applied to a heater, and the same parts as those in FIG. Reference numeral 10 denotes a secondary combustion chamber provided downstream of the constriction portion 6, which is comprised of a secondary air port 11 and a catalyst layer 13 provided at the exhaust port 12. 14 is a fan that sends warm air into the room, 15 is a hot air outlet, and 16 is a case of a hot air generator.

In the above configuration, the mixed gas ejected from the slit hole 4 is swirled so as to be in contact with the inner periphery of the circular tube 1, and one side is turned around at the closed end 2.
The other side generates a swirling flow toward the open end 3. When ignited here, an annular flame 9 is formed from the closed end 2 toward the open end 3. The outer circumferential side of this flame 9 is a flow of mixed gas, and the inner circumferential side is a flow of exhaust gas. Therefore, the mixed gas moves toward the open end 3 while swirling, and if the constriction part 6 were not present, the gas that would not be able to form the flame 9 would be discharged without being burned.

However, in the present invention, the mixed gas flows into the flame 9 due to the throttle part 6.
It is pushed to the side, passes through the flame zone and burns. Therefore, the throttle part 6 needs to be smaller than the flame diameter, and since the mixed gas is brought close to the flame band 9 to form a flame and burn, it is sufficient that it is close to the flame diameter. Also, exhaust gas is discharged from the center.

Furthermore, in FIG. 3, the exhaust gas is in the secondary combustion chamber 1.
0, the air passes through the catalyst layer 13, and is released into the room from the air outlet 15 together with the air from the fan 14.

Effects of the Invention As described above, according to the combustor of the present invention, one end of the circular tube is closed and the other end is opened, and a slit hole is formed in the tangential direction on the inner circumferential surface of the circular tube close to the closed end. By squeezing the holes and providing a constriction part with a diameter smaller than the diameter of the circular tube at the open end, leakage of the mixed gas can be blocked and an annular flame blown out on one side can be formed, thereby providing a combustor with a configuration that is easy to use in practice. can.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustor in an embodiment of the present invention,
FIG. 2 is a sectional view of the same, and FIG. 3 is a sectional view of the combustor of the present invention applied to a heater. 1... Circular pipe (combustion chamber), 2... Closed end, 3... Open end, 4... Slit hole, 5
...Inner peripheral surface, 6...Aperture section, 7...
...Mixed gas rectifier, 8...Mixed gas supply pipe, 9...Flame (annular flame). Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure! Figure 3 to, ) (su

Claims (1)

[Claims] A slit hole is formed in the tangential direction on the inner peripheral surface of the circular tube close to the closed end of a circular tube with one end closed and the other end opened, and a slit hole is formed in the open end with a diameter smaller than the diameter of the circular tube. The combustor is provided with a mixed gas rectifying part and a mixed gas supply pipe in communication with the slit hole.