JPH0545413U - Combustion device - Google Patents

Abstract

(57) [Abstract] [Purpose] A sufficient flame current is secured by narrowing down the amount of combustion to expand the range of the amount of slight heat.
Prevents the occurrence of red fire when the heat is strong or medium. A burner 1 including a lower burner 2 having a mixing tube 3 and an upper burner 5 having a flame net 7 on the upper surface and a rectifying net 6 inside.
A frame rod 12 is provided on the flame hole network 7, and a guide body 14 for guiding the air-fuel mixture from the outlet of the mixing tube 3 onto the flame hole network 7 is provided under the flame hole network 7 facing the frame rod 12. Further, a negative pressure plate 15 inclined toward the mixing pipe 3 side is provided at the mixture inlet of the guide body 14. [Effect] The range of the amount of slight heat can be expanded further than before, and the occurrence of red fire is prevented even when the amount of heat is strong or medium.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a combustor in which liquid fuel is vaporized and ejected from a nozzle, and the ejected energy sucks primary air into a mixing tube and burns it on the burner net of the burner.

[0002]

[Prior Art]

 As shown in FIGS. 5 and 6, the conventional combustion apparatus of this type vaporizes the fuel sucked from the oil tank 17 by the electromagnetic pump 16 in the vaporizer 18, and the vaporized gas is mixed from the nozzle 8 to the mixing pipe. 3, the primary energy is sucked into the mixing tube 3 by this ejection energy, mixed in the mixing tube 3, ejected onto the flame net 7 of the burner 1, and ignited by the ignition heater 19. Form a flame.

On the other hand, a flame rod 12 is provided in the flame on the flame net 7, and a thermoelectromotive force is generated by heating the flame rod 12 with the flame, and the flame current generated by this is used. It controls the safety device of the combustion device.

[0004]

[Problems to be solved by the device]

 In such a conventional product, as described above, the flame rod current is detected by the frame rod 12 as a safety device. However, if the combustion amount is reduced to a slight amount of heat, the flame current is reduced as shown in FIGS. 7 and 8. The current value becomes a value below the lower limit of detection, abnormal detection is made, combustion cannot be continued, and there is a drawback that it cannot be used.

[0007] Therefore, in the early spring and autumn when the weather is not too cold, even if the fuel is burned with a slight amount of heat, the room temperature rises further to extinguish the fire, and there is a drawback that an unpleasant odor is generated each time the ignition or the fire is extinguished.

[0006]

[Means for Solving the Problems] The present invention has been made to solve the above problems. Specifically, the mixture gas from the outlet of the mixing pipe is flamed to the lower portion of the flame hole network facing the frame rod. A guide body is provided directly on the hole network, and a negative pressure plate inclined toward the mixing tube is provided at the inlet of the guide body.

[0007]

[Action]

 Since the amount of air-fuel mixture ejected onto the flame network through the guide body is larger than in other parts, the flame current value can be increased by the increase in the amount of combustion even with a slight amount of heat, and the amount of minute heat can be reduced more than before. Can be used.

[0008] Further, when the flow velocity of the air-fuel mixture is high and the amount of heat in the medium is high, a vortex is swirled on the downstream side of the negative pressure plate to reduce the pressure, so that the amount of the air-fuel mixture passing through the guide body can be reduced, and the flame facing the guide body It is possible to prevent the occurrence of red fire on the hole network.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 is a burner, which is composed of a lower burner 2 and an upper burner 5. The bottom 2 of the burner forms a mouse 2a at the base, and forms a flared mixing tube 3 inside. A baffle 4 is provided on the upper surface of the mixing tube 3 and has a plurality of small holes in the plane. 5 has an upper surface opened on the burner, a rectifying mesh 6 is attached inside, and a flame hole mesh 7 is attached to the upper opening by spot welding. A frame rod 12 is attached to the upper surface of the flame hole network 7 so as to cross it. Reference numeral 14 denotes a cylindrical guide body which is provided below the flame net 7 facing the frame rod 12 so as to pass through the flow straightening net 6 and the baffle 4 and to be directly connected to the outlet of the mixing pipe 3. Reference numeral 15 denotes a negative pressure plate, which is provided on the baffle 4 on the air-fuel mixture inlet side of the guide body 14, and the other side is inclined to the side of the mixing pipe 3.

Next, the operation will be described. The vaporized gas is ejected from the nozzle 8 and flows into the mixing tube 3 from the mouse 2 a below the burner 2. At this time, the primary air is also sucked into the mixing tube 3 from around the mouse 2a and is sufficiently mixed with the vaporized gas in the mixing tube 3. Then, the mixed vaporized gas is uniformly rectified by the baffle 4, further completely rectified by the rectification network 6, and is ignited by an igniter (not shown) on the upper flame network 7 as shown in FIG. So that the main flame 9 is formed. At the same time, the air-fuel mixture discharged from the outlet of the mixing tube 3 flows into the guide body 14 and forms the flame detection flame 13 on the flame hole network 7 at the outlet. In the case of a slight amount of heat, this flame for detection of flame is larger than the surrounding main flame 9 that has passed through the rectifying network 6 and the baffle 4. Therefore, when this flame contacts the frame rod 12, it contacts the surrounding main flame 9. A larger frame current can be obtained than (FIGS. 7 and 8) On the other hand, when the flow rate from the outlet of the mixing tube 3 is high when the heat is strong and the amount of heat is medium, a vortex is swirled in the portion that is throttled at the mixture inlet side of the guide body 14 and flows into the guide body 14. The amount of the air-fuel mixture flowing into the guide body 14 is reduced by the pressure reduction, and the occurrence of red fire on the flame net 7 is prevented.

[0012]

[Effect of the device]

 As described above, according to the present invention, by providing the guide body that guides the air-fuel mixture from the air-fuel mixture outlet onto the flame net, it is possible to secure a sufficient flame current even in the case of a small amount of heat with a reduced combustion amount. For example, even in the early spring or autumn when the weather is not too cold, it is possible to perform clean and comfortable heating without the need for extinguishing and controlling ignition.

Further, by providing a negative pressure plate inclined to the mixing pipe side at the inlet side of the guide body, it is possible to prevent the occurrence of red fire even when the amount of the air-fuel mixture is large when the heat amount is medium, so that a safe combustion can be achieved. There is an advantage that a baking device can be provided.

[Brief description of drawings]

FIG. 1 is a top view of a burner according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of the main part.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a schematic structural view of a conventional combustion device.

FIG. 6 is a perspective view of the same.

FIG. 7 is a performance characteristic diagram of the present invention and a conventional example.

FIG. 8 is a performance characteristic diagram of the present invention and a conventional example.

[Explanation of symbols]

 1 Burner 3 Mixing Tube 6 Rectifying Network 7 Flame Hole Network 12 Frame Rod 14 Guide Body 15 Negative Pressure Plate

Claims (2)

[Scope of utility model registration request] 1. A burner (1) is formed by a lower burner (2) having a mixing tube (3), a flame hole network (7) on the upper surface, and an upper burner (5) having a flow straightening network (6) inside. In the combustion device in which the flame rod (12) is provided on the flame net (7), the flame rod
Combustion device provided with a guide body (14) for guiding the air-fuel mixture from the outlet of the mixing pipe (3) onto the flame hole network (7) below the flame hole network (7) facing the flame hole network (7). 2. The combustion device according to claim 1, wherein
A combustion apparatus in which a negative pressure plate (15) inclined to the mixing pipe (3) side is provided at the mixture inlet of the guide body (14).