JP3006051U - Combustion device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a combustion device which can be commonly used for various gas species and which has excellent fire transfer performance and combustion performance. [Structure] A plurality of burners 2 for burning fuel gas are arranged side by side with an interval, and a fire transfer plate 15 or 16 is provided between each burner 2 for assisting inter-row fire transfer. ,
Secondary flame holes 9 and 11 are arranged on both sides of the main flame hole 10 and a flame transfer flame hole 17 is provided in the vicinity of the flame transfer plate 15 or 16. The flame transfer flame hole 17 is smaller than the main flame hole 10. It is formed in an area and is provided so as to be offset to the side of the secondary flame hole 9 in the fire transfer direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device, and more particularly, to a burner flame hole that ensures a fire transfer performance and improves a combustion state.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a combustion device that incorporates a fire transfer plate to assist the heat transfer so that the heat transfer between a plurality of burners can be performed smoothly has already been known. Here, as an example, the schematic configuration of the combustion apparatus will be described with reference to FIG.

The combustion apparatus 1 is provided with a plurality of burners 2, and combustion air is supplied from below. A throat 3 serving as a fuel gas suction port is formed below the burner 2, and the fuel gas is jetted and supplied from the nozzle 14, with which combustion air (primary air) is sucked. The downstream side of the throat 3 is bent upward and is connected to the mixing chamber 21. The head of the mixing chamber 21 is provided with a flame hole forming surface 8 having a plurality of flame holes.

The burners 2 are arranged in parallel in the burner case 5 at a predetermined interval and are housed in the combustion chamber 23. A blower (not shown) is provided below the combustion chamber 23 so as to supply combustion air into the combustion chamber 23. A rectifying plate 4 (for example, punching metal) is provided on the bottom surface of the burner case 5, and the combustion air that has passed through the plurality of holes formed in the rectifying plate 4 has a uniform flow rate, so that the burner 2 It is designed to flow upward.

On the flame hole forming surface 8 of the burner 2, a plurality of main flame holes 10 for ejecting the air-fuel mixture to form the main flame 19 are provided in a row. On the other hand, a plurality of air-fuel mixture discharge ports 22 (hereinafter, referred to as discharge holes) are formed in the upper side surface of the mixing chamber 21 of the burner 2 in the direction in which the main flame holes 10 are arranged. On both sides of the main flame hole 10, auxiliary flame holes 9 and 11 for ejecting the air-fuel mixture from the discharge hole 22 are provided. The auxiliary flame hole 9 is located in the fire transfer direction, and the auxiliary flame hole 11 is located in the igniter 7 direction. The air-fuel mixture to the auxiliary flame holes 9 and 11 is reduced in pressure by narrowing the flow passage or increasing the flame hole area to reduce the flow velocity. Therefore, the auxiliary flames 12 and 18 formed in the auxiliary flame holes 9 and 11 are less likely to be lifted, and the flame holding property is improved. Therefore, the auxiliary flames 12 and 18 have the function of preventing the lifting of the main flame 19 by providing this flame holding property.

Further, as shown in FIG. 3, a fire transfer plate 15 is provided in order to smoothly perform the fire transfer between the plurality of burners. The fire transfer plate 15 is formed so as to bridge between the adjacent burners. In other words, it is provided so as to partially fill the flow path of the secondary air, which is the gap between the burners. As shown in FIG. 3 (a), a burner side plate 6 for positioning and fixing the burner 2 is provided, and a fire transfer plate 15 extending from the burner side plate 6 is provided between each burner 2 and close to the flame hole forming surface 8. Is provided.

[0007]

[Problems to be solved by the device]

 However, when the fire transfer plate 15 is provided so as to bridge between the burners, there is a problem that the combustion flame in the part of the fire transfer plate 15 causes poor combustion and yellow chips are easily generated. The fire transfer plate 15 blocks the secondary air flow path between the burner units while improving the burn transfer of the burner. When the secondary air becomes insufficient, as shown in FIG. 3C, the combustion flame extends and adjacent combustion flames interfere with each other above the transfer plate 15, resulting in poor combustion and yellow chips. (Yellow flame) is generated.

Although the generation of yellow chips can be prevented by shortening the fire transfer plate 15, the length of the fire transfer plate 15 is set to be different from that of the gas type in order to secure both the fire transfer performance and the combustion performance. It is not preferable to select each according to the requirements of universality. Therefore, it is necessary to use a fire transfer plate that can be commonly used for different gas types and that has good transfer performance and combustion performance. In particular, in recent years, as the capacity of combustion appliances has increased, high-load combustion has been promoted by making combustion appliances more compact, and it has become even more difficult to make a fire transfer plate that can be commonly used for different gas types. SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a combustion device having excellent fire transfer performance and combustion performance even between different gas types.

[0009]

[Means for Solving the Problems]

 In the combustion apparatus of the present invention which solves the above-mentioned problems, a plurality of burners for burning fuel gas are arranged in parallel at intervals, and a plurality of main flame holes are formed in the head of each burner, and the main flame holes are formed. In a combustor in which auxiliary flame holes are formed on both sides of the main flame hole, and a flame transfer plate for assisting the flame transfer is provided between each of the burners. The gist of the present invention is that the flame holes are formed with a smaller hole area than the other main flame holes, and are provided closer to the side of the auxiliary flame holes in the fire transfer direction.

[0010]

[Action]

 In the combustion apparatus of the present invention having the above-mentioned configuration, the main flame hole adjacent to the fire transfer plate has a small hole area, so that the fuel gas amount of the main flame involved in the fire transfer is reduced. As a result, the amount of secondary air does not become insufficient with respect to the amount of gas, and yellow flame (yellow chips) does not occur near the fire transfer plate. In addition, since the main flame holes close to the fire transfer plate are provided closer to the sub flame hole side in the fire transfer direction, the actual distance between the fire transfers does not change, so even if the amount of fuel gas is small Does not deteriorate transfer performance. Therefore, it is possible to provide a combustion device that has both good fire transfer performance and good combustion performance, and a wide margin in combustion performance, so that different gas types can be used in common.

[0011]

【Example】

 In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the combustion apparatus of the present invention will be described below. The feature of this combustion device is the size and position of the flame holes near the fire transfer plate, and other configurations of the combustion device are the same as the conventional ones. Omitted with a technical explanation.

FIG. 2 shows a combustion apparatus as one embodiment according to the present invention, (a) is a top view and (c) is a side sectional view. In each burner, the two main flame holes 17 that are closest to the fire transfer plate 15 have a shorter flame hole length than the other main flame holes 10 and are offset toward the auxiliary flame hole 9 side in the fire transfer direction. (Hereinafter, this main flame hole 17 will be referred to as a flame transfer flame hole 17 to distinguish it from the other main flame holes 10). The purpose is to eliminate the yellow chips (yellow flame) on the fire transfer plate 15 and to secure the fire transferability. The cause of yellow chips (yellow flame) is that the secondary air becomes insufficient near the fire transfer plate 15 and the combustion flame extends, and adjacent burner flames interfere with each other, resulting in poor combustion of the combustion flame. . Therefore, the main flame hole close to the fire transfer plate 15, that is, the fire transfer flame hole 17 is made small to reduce the amount of fuel gas to be ejected and the shortage of secondary air is eliminated. By reducing the amount of fuel gas, the required secondary air amount proportionally decreases, and a relatively sufficient amount of secondary air is supplied, so that the generation of yellow chips (yellow flame) can be prevented.

On the other hand, if the gas amount is simply reduced, the flame holding performance and the fire transfer performance will deteriorate. Therefore, the flame transfer flame hole 17 is provided offset to the position of the auxiliary flame hole 9 on the fire transfer direction side. That is, the flame holding property and the flame transfer property are secured by reducing the distance between the flame transfer flame hole 17 and the auxiliary flame hole 9 on the flame transfer direction side. (The fire transfer direction is the direction in which the burner 2 transfers heat from the igniter 7 as a base point.)

Fire transfer, which is performed almost immediately after ignition, is performed in the following order. First, when the igniter 7 ignites the fuel gas of the first burner 2, the transfer flame 13 is formed in the transfer flame hole 17. The flame hole forming surface 8 is formed in a chevron shape, and the flame transfer flame hole 17 is provided on the side of the auxiliary flame hole 9 side in the fire transfer direction, and the fire transfer plate 15 blocks the secondary air between the burners 2. Therefore, the fire transfer flame 13 is inclined in the fire transfer direction. Therefore, the first flame 13 transfers to the air-fuel mixture in the secondary flame hole 11 of the second burner 2 to form the secondary flame 18. When the secondary flame 18 is formed, the primary flame 19 and the secondary flame 12 are formed, and the transfer of flame to the second burner 2 is completed. Then, the flames are successively transferred to the other burners 2 in the same manner.

As shown in (a) of FIG. 2, the fire transfer plate is not limited to the shape of the fire transfer plate 15 integrally provided from the burner side plate 6, but also as shown in (b) of FIG. It may be formed on the side surface of the burner 2. Also in this case, the positional relationship of the fire transfer flame hole 17 with respect to the fire transfer plate 16 does not change. The order of the fire transfer is the same as that described above.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. is there. For example, the fire transfer flame hole 17 provided in the vicinity of the fire transfer plate is not limited to a vertically long shape in the auxiliary flame hole direction, and may be a round hole or a horizontally long hole. Further, the flame hole forming surface 8 is not limited to the mountain shape and may be a horizontal shape. Further, the number of the flame transfer flame holes 17 is not limited to two per flame transfer plate 15 or 16. Further, the number of igniters 7 is not limited to one, and igniters may be provided at the burners at both ends and fire transfer flame holes 17 may be provided in accordance with the respective fire transfer directions.

[0017]

[Effect of device]

 As described in detail above, according to the combustion device of the present invention, it is possible to prevent the occurrence of yellow flames (yellow chips) while maintaining the fire transfer performance, and further, it is possible to commonly use different gas types. Play.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a combustion device incorporating a burner.

FIG. 2 is a schematic view of a main part of a combustion device as an example.

FIG. 3 is a schematic view of a main part of a conventional combustion device.

[Explanation of symbols]

 2 Burners 9 and 11 Secondary flame holes 10 Main flame holes 12 and 18 Secondary flames 13 Fire transfer flames 15 and 16 Fire transfer plates 17 Fire transfer flame holes

Claims (1)

[Scope of utility model registration request] 1. A plurality of burners for burning a fuel gas are arranged in parallel at intervals, a plurality of main flame holes are formed in the head of each burner, and auxiliary flame holes are formed on both sides of the main flame holes. In a combustion device in which a fire transfer plate is provided between each of the burners to assist the transfer of heat, a main flame hole of the plurality of main flame holes that is adjacent to the fire transfer plate is A combustion apparatus, which is formed with a hole area smaller than a flame hole and is provided so as to be biased toward the auxiliary flame hole side in the fire transfer direction.