JPH0232967Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a pulse combustion device.

(Prior art and its problems) In a conventional pulse combustion device, for example, an air flapper valve chamber for preventing backflow and a gas flapper valve chamber are independently provided, and the air and gas that have passed through these valve chambers are premixed by piping. There is a system in which the premixed gas is introduced into a combustion chamber and then the premixed gas is introduced into a pulse combustion chamber. However, with this method, the volume that affects the rise in pressure due to instantaneous combustion in the combustion chamber is large, so
The disadvantage is that the degree of pressure increase is small. In addition, as another method, there is a device in which an air and gas introduction section equipped with a backflow prevention valve is integrated with the combustion chamber, as disclosed in Japanese Utility Model Application Publication No. 58-93613, for example. In this case, the air introduction section is simply an extension of the upstream side of the combustion chamber with the same diameter. By the way, the area of the cross section in which the backflow prevention valve is provided in the air introduction part must be made large in order to increase the amount of air that can be introduced per unit time. The volume that affects the increase in pressure increases,
Again, there is a drawback that the degree of pressure increase is small.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The configuration of the present invention will be explained with reference to FIGS. 1 and 2 corresponding to the embodiment. An introduction chamber 2 is provided, and the gas introduced from the introduction chamber 2 into the combustion chamber 1 is configured to have a cross flow with the air introduced from the upstream side of the combustion chamber 1. The air flap valve chamber 3 has an enlarged air flap valve chamber 3, and an air flap valve 6 is provided in the enlarged cross section of the air flap valve chamber 3.

(Operations and Examples) In the above configuration, air is introduced into the combustion chamber 1 from the air flapper valve chamber 3 via the flapper valve 6, and combustion gas is introduced into the gas introduction chamber via a flapper valve (not shown). 2 into the combustion chamber 1,
Mix. However, the spark rod 4 in the mixture
When ignited, the air-fuel mixture combusts instantaneously,
The pressure inside the combustion chamber 1 rises rapidly, and the combustion gas is discharged from the exhaust pipe 5. Since the inside of the combustion chamber 1 becomes a negative pressure due to the inertia during the discharge, the air and gas are sucked in by opening the respective flapper valves 6, and introduced into the combustion chamber 1 as described above, where they are subjected to combustion. ,
In this way, instantaneous combustion is repeated intermittently. At this time, the air-fuel mixture can be ignited by a portion of the combustion gas returning into the combustion chamber 1, or ignition can be repeated by forced ignition using a pulse oscillator.

In this case, the present invention expands the air flapper valve chamber 3 into a truncated cone shape on the upstream side of the combustion chamber 1, and the flapper valve 6 is provided on the enlarged cross section to introduce air. Due to the enlarged cross section, which has a larger area than the cross section of the chamber 1, the amount of air that can be introduced per unit time can be increased, and the combustion chamber 1 can be made smaller, and the integration eliminates the need for piping. At the same time, the volume of the air flapper valve chamber 3 on the combustion chamber 1 side can also be reduced due to the truncated conical shape. In this way, the volume that affects the pressure rise due to instantaneous combustion in the combustion chamber 1 can be reduced, so as shown in Figure 3, it is possible to increase the pressure rise due to instantaneous combustion, and at the same time reduce the degree of negative pressure. By making it possible to increase the amount of air and gas sucked in, combustion with a higher load can be achieved.
In addition, in the present invention, the gas introduction chamber 2 is configured around the outer periphery of the combustion chamber 1, and is configured to form a cross flow with the air introduced from the upstream side, so that the gas and air are mixed well, and the pressure increases as described above. This not only contributes to increasing the amount of combustion by making it even more effective, but also contributes to making the entire device more compact.

(Effect of the invention) As described above, the present invention increases the cross section of the air flapper valve chamber through which air is introduced and increases the amount of air that can be introduced per unit time. Since it is possible to reduce the volume that affects the increase in pressure caused by the combustion, it is possible to perform combustion under a higher load and to provide a combustion device that is more compact as a whole.

[Brief explanation of drawings]

Figure 1 is an explanatory longitudinal cross-sectional view showing the overall configuration;
The figure is an explanatory perspective view of the main part, and FIG. 3 is an explanatory diagram comparing the performance with a conventional combustion device. Code 1...Pulse combustion chamber, 2...Gas introduction chamber,
3...Air flap valve chamber, 4...Spark rod, 5...Exhaust pipe, 6...Flutter valve.

Claims (1)

[Scope of utility model registration request] A gas introduction chamber is provided on the outer periphery of the pulse combustion chamber, and the gas introduction chamber is configured so that the gas introduced into the combustion chamber is in cross flow with the air introduced from the upstream side of the combustion chamber. A pulse combustion device comprising an air flapper valve chamber expanded into a trapezoidal shape, and an air flapper valve provided in an enlarged cross section of the air flapper valve chamber.