JP2569812Y2 - Combustion equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus in which liquid fuel is vaporized and ejected from a nozzle, primary air is sucked into a mixing pipe by the energy of the ejected fuel, and burned on a burner network of burners.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional combustion apparatus of this type vaporizes fuel sucked from an oil tank 17 by an electromagnetic pump 16 in a vaporizer 18 and discharges the vaporized gas into a nozzle. 8, the primary air is sucked into the mixing tube 3 by the energy of the jetting, mixed in the mixing tube 3, ejected onto the flame hole network 7 of the burner 1, and ignited by the ignition heater 19. And form a flame.

On the other hand, a flame rod 12 is provided in a flame on the flame hole network 7.
Is heated by a flame to generate a thermoelectromotive force, and a flame current is used to control a safety device of the combustion device.

[0004]

As described above, in such a conventional product, the flame rod current is detected by the flame rod 12 as a safety device. However, when the amount of combustion is reduced to a small amount of heat, FIGS. As shown in FIG. 8, there is a disadvantage that the flame current value becomes equal to or lower than the lower limit of the detection, the abnormality is detected, the combustion cannot be continued, and the flame cannot be used.

[0005] For this reason, there is a drawback that even in the early spring or early autumn season when the combustion is carried out with a slight amount of heat, the room temperature further rises and the fire is extinguished, and an unpleasant smell is generated each time the fire or fire is extinguished.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and more specifically, a fuel-air mixture from an outlet of a mixing pipe is provided at a lower portion of a flame hole network facing a frame rod. A guide body that guides directly on the hole network is provided,
Further, a negative pressure plate inclined toward the mixing tube is provided at the entrance of the guide body.

[0007]

[Function] Since the amount of air-fuel mixture jetted through the guide body onto the flame hole network is larger than the other parts, the flame current value can be increased by the increased amount of combustion even at the time of low calorific value. Can also be used.

[0008] In addition, when the air-fuel mixture has a high-medium calorie with a high flow velocity, a vortex is formed downstream of the negative pressure plate, and the pressure is reduced, so that the amount of the air-fuel mixture passing through the guide body can be reduced. The occurrence of red fire on the hole network can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a burner, which is composed of a lower burner 2 and an upper burner 5. The lower part 2 of the burner forms a mouth 2a at the base, and a divergent mixing tube 3 inside.
Is formed. A baffle 4 is provided on the upper surface of the mixing tube 3 and has a plurality of small holes in a plane. Numeral 5 has an upper surface opened on the burner, a rectifying net 6 inside, and a flame hole net 7 on the upper opening by spot welding. A frame rod 12 is mounted on the upper surface of the flame hole network 7 so as to cross the flame rod network. Reference numeral 14 denotes a cylindrical guide body, and the frame rod 12
The baffle 4 and the baffle 4 penetrate the baffle 4 under the flame hole network 7 opposite to the above, so as to be directly connected to the outlet of the mixing pipe 3. 1
Reference numeral 5 denotes a negative pressure plate which is provided on the baffle 4 on the side of the air-fuel mixture inlet of the guide body 14 and whose other side is inclined toward the mixing pipe 3.

Next, the operation will be described. The vaporized gas is ejected from the nozzle 8 and the mixing pipe 3 is sent from the mouth 2a below the burner 2.
Flows into. At this time, the primary air is also sucked into the mixing tube 3 from around the mouse 2a, and 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 net 6, ignited by an igniter (not shown) on the flame net 7 on the upper side thereof, and as shown in FIG. The main flame 9 is formed. At the same time, the air-fuel mixture coming out of the outlet of the mixing pipe 3 flows into the guide body 14 and forms a flame detection flame 13 on the flame network 7 at the outlet. In the case of a small amount of heat, this flame detection flame is larger than the surrounding main flame 9 that has passed through the rectifier net 6 and the baffle 4. Therefore, when this flame comes into contact with the frame rod 12, it comes into contact with the surrounding main flame 9. A larger frame current can be taken. (FIGS. 7 and 8) On the other hand, the flow rate from the outlet of the mixing tube 3 is increased when the amount of heat is high or medium, but a vortex is formed at the portion where the guide body 14 is throttled at the air-fuel mixture inlet side and flows into the guide body 14. The amount of air-fuel mixture which is reduced in pressure and flows into the guide body 14 is reduced, thereby preventing the occurrence of red fire on the flame net 7.

[0012]

[Effects of the Invention] As described above, in the present invention, by providing a guide member for guiding the air-fuel mixture from the outlet of the air-fuel mixture onto the flame network, a sufficient flame current is secured even in the case of a small amount of heat with a reduced combustion amount. For example, even when the temperature is not so cold in early spring or early autumn, clean and comfortable heating that does not require fire extinguishing and ignition control can be performed.

Further, by providing a negative pressure plate inclined toward the mixing pipe at the inlet side of the guide body, it is possible to prevent the occurrence of red fire even when the amount of air-fuel mixture at the time of strong or medium heat is large, and to achieve safe combustion. There are advantages that the device can be provided.

[Brief description of the 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. 2;

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]

 DESCRIPTION OF SYMBOLS 1 Burner 3 Mixing pipe 6 Rectifier net 7 Flame net 12 Frame rod 14 Guide body 15 Negative pressure plate

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-7805 (JP, A) JP-A-63-80453 (JP, U) JP-A-61-8725 (JP, U) JP-A-2-8 7424 (JP, U) Actually open 60-81457 (JP, U) Actually open 62-39117 (JP, U) Actually open 2-147617 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. Under a burner (2) having a mixing tube (3)
And a burner (1) formed by a burner net (7) on the upper surface and a burner net (5) having a straightening net (6) inside, and a flame is formed on the burner net (7). In a combustion device provided with a muffle rod (12), an air-fuel mixture from an outlet of the mixing pipe (3) is guided onto the flame net (7) below the flame hole network (7) facing the frame rod (12). A guide body (14) is provided, and a negative pressure plate (15) inclined toward the mixing pipe (3) is provided at the mixture inlet of the guide body (14), so that the guide body (14) is provided when the heat amount is relatively strong. A combustion apparatus characterized in that the amount of air-fuel mixture flowing into the guide body (14) at the time of relatively low heat is increased while the amount of air-fuel mixture flowing into the guide body (14) is reduced.