JPS593202Y2 - gun type burner - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gun-type burner in which a fuel injection nozzle is provided in the combustion cylinder, and the air sent by rotation of a fan and the fuel are mixed and combusted. Regarding the structure of the case part.

An embodiment of the present invention will be described below.

In the figure, 1 is a fan, and 2 is a fan case that houses the fan 1, which includes a container-like housing 3 as shown in FIG. 2, and a housing 3 with a shape as shown in FIG. Guide 4 and more.

The guide 4 is formed by bending a flat plate into an annular shape,
The guide 4 and the housing 2 form a double wall.

Reference numeral 5 denotes a constricted portion of the guide 4, and by forming this constricted portion 5, a large diameter portion 6 surrounding the fan 1 and a small diameter portion 7 corresponding to the communication port 11 described below are formed.

The large and small diameter portions 6 and 7 are both substantially circular, and are connected by a constriction portion 5 on their eccentric sides.

Reference numeral 8 denotes a fixed plate that closes the opening of the housing 3, and has an intake port 9 at a position corresponding to the chamber 6 and a communication port 11 communicating with the combustion cylinder 10 at a position corresponding to the chamber 7.

Reference numeral 12 denotes a combustion chamber, and a heat exchanger 13 is formed adjacent to the combustion chamber.As shown in FIG. 1, an intake port 9 is provided opposite to the heat exchanger 13.

14 is an ignition electrode arranged in the combustion tube 10 inserted into the heat exchanger 13, and 15 is a fuel injection nozzle.

16 is a motor, the above-mentioned fan 1 is directly connected to its rotating shaft, and the fan 1 is installed in the chamber 6 of the guide 4.

In the above configuration, when the fan 1 rotates, air is sucked into the large diameter portion 6 from the intake port 9 toward the center of the fan 1 .

This air is released in the direction of the centrifugal force of the fan 1, and the guide 4
It passes through the constriction part 5 and enters the small diameter part 7.

This intruding air reaches the communication port 11 while swirling around the small diameter portion 7, and is further sent into the combustion cylinder 10.

Fuel is sprayed into the combustion tube 10 from a nozzle 15, and this fuel is mixed with the swirling air that has entered the combustion tube 10 and ignited by the ignition electrode 14.

The speed of the swirling air is low at the center and high at the periphery, and a negative pressure area is created in the center, so some of the fuel is supplied to this negative pressure area, resulting in extremely uniform fuel and air overall. A mixed state is obtained.

Here, the fan case 2 is formed by mounting a guide 4, which is a flat plate bent into an annular shape, in the housing 3, and there is no need to form the guide by mold processing, large-scale sheet metal processing, etc. Easy to assemble.

In addition, since the small diameter part 7 is directly connected to the throttle part 5, turbulence does not occur in the area from the throttle part 5 to the small diameter part 7 and the swirling flow is not weakened. Although it is necessary to change the air volume, in this case, the air volume can be easily adjusted by making the housing 3 slightly larger in advance and replacing the guide 4 that corresponds to the size of the fan 1.

Note that screws, rivets, welding, etc. may be used to attach the guide 4 to the housing 3.

In this invention, the fan case is formed by the guide, the housing, and the fixed plate, making it easy to manufacture without requiring mold processing or large-scale sheet metal processing.Furthermore, the intake port of the fixed plate is opened to face the heat exchanger. Therefore, the sound emitted from this intake port is exhausted after hitting the heat exchanger, which means that it is attenuated by bending, so it becomes extremely small compared to when it goes out directly to the outside, and it does not become noise. However, if the intake port faces the heat exchanger in this way, outside air will not directly flow in from the intake port and destabilize the combustion state.

In addition, this invention uses a guide in which a flat plate is bent into an annular shape to continuously form a large diameter part surrounding the fan, a throttle part, and a small diameter part corresponding to the communication port of the combustion tube. The swirling flow into the combustion cylinder does not weaken due to turbulent flow in all parts, so a fan with small capacity can be used, and a strong swirling flow can be sent into the combustion cylinder, so the combustion condition can be maintained. It will be good.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a gun type burner according to an embodiment of the present invention, Fig. 2 is a perspective view showing the housing of the fan case, Fig. 3 is a perspective view showing the guide of the case, and Fig. 4 is It is a side view of the same case. 1...Fan, 2...Fan case,
3... Housing, 4... Guide, 8...
...Fixing plate, 9...Intake port, 10...
・Combustion cylinder, 11...Communication port.

Claims (1)

[Scope of utility model registration request] A fixed plate having a communication port for an intake port and a combustion cylinder on the same plane, a housing that covers this fixed plate and houses a fan, and is connected to the communication port of the fixed plate and has a nozzle inside. It is equipped with a built-in combustion cylinder and a guide provided between the housing and the fixed plate to guide air from the intake port to the communication port, and the guide is made by bending a flat plate into an annular shape, and inside it, A substantially circular large-diameter portion surrounding the fan, a substantially circular small-diameter portion corresponding to the communication port, and a constriction portion connecting these large and small diameter portions on their eccentric sides are formed, and the air intake of the fixed plate is A gun-type burner characterized in that the mouth is opened to face a heat exchanger into which the combustion tube is inserted.