JPH0590141U - Burner unit - Google Patents

Abstract

(57) [Summary] [Purpose] The air supplied from the combustion fan 1 is burner 2
Providing a burner unit that distributes the pressure evenly and is easy to assemble. [Structure] The lower plate is formed by extending the lower end of the side plate 20 of the burner frame 9.
22 is integrally formed. The lower plate 22 is appropriately provided with holes 14 by punching or the like, and the lower plate 22 covers the lower surface of each burner assembly to form the pressure equalizing plate 10. As a result, the air supplied from the fan 1 is evenly distributed by the pressure equalizing plate 10 into the gap between the burners 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a burner unit used in a combustion device such as a water heater.

[0002]

[Prior Art]

 An example of a burner unit used in a conventional burner such as a water heater is shown in FIG. In the figure, a burner unit 21 includes a plurality of burners 2 arranged in a direction orthogonal to the plane of the paper of FIG. It is composed of a pressure equalizing plate 10 connected to the lower end side of the side plate 20 of the frame body 9 by spot welding or screwing. The pressure equalizing plate 10 and the side plate 20 of the burner frame 9 are separately processed. When the burner unit 21 is assembled, the end 11 of the pressure equalizing plate 10 and the lower end 13 of the side plate 20 are overlapped with each other. The portion 19 is attached by connecting means such as spot welding or screwing as described above.

The pressure equalizing plate 10 is a flat plate (FIG. 6 (a)) or a plate having an inverted chevron shaped portion 17 (FIG. 6 (b)). This is for covering the lower surface of the burner assembly and evenly distributing the air supplied from the fan 1 in the gap between the burners 2.

During operation of the combustion device incorporating the burner unit 21, when the combustion fan 1 is driven to eject gas from the nozzle 8 into the burner 2, primary air is sucked into the burner 2 by the ejection of the gas. Then, the gas and the primary air are premixed, and the secondary air is supplied to the combustion chamber 3 from the fan 1 through the pressure equalizing plate 10 attached to the burner frame 9, and forced combustion is performed in the combustion chamber.

[0005]

However, in the conventional pressure equalizing plate 10, as shown in FIG. 5, the side plate lower end 13 of the burner frame 9 and the end 11 of the pressure equalizing plate 10 overlap with each other to perform spot welding or screwing. Since they are connected by a stopper or the like, the overlapping portion 19 of the end 11 of the pressure equalizing plate 10 and the lower end 13 of the side plate has resistance against passage of secondary air from the combustion fan 1 to the burner 2 side. There is a risk that this air will not be smoothly supplied to the burner 2 side. Therefore, there was a risk that the secondary air flow would be non-uniform and the gas combustion state would be non-uniform depending on the location.

Further, when the pressure equalizing plate 10 is attached to the side plate 20 by spot welding or screwing, the pressure equalizing plate 10 is easily displaced and connected from a predetermined mounting position. In that case, the air flow from the fan 1 is as designed. No flow, especially when using the pressure equalizing plate 10 provided with the inverted chevron shaped portion 17 as shown in FIG. 6B to adjust the air flow more finely, attach the pressure equalizing plate 10 to the side plate 20. The positional deviation has a greater effect and deteriorates the pressure equalizing performance.

Further, in the overlapping portion 19 of the pressure equalizing plate 10 and the burner frame 9, the air resistance of the secondary air becomes large, and a large fan 1 is selected as necessary to make up for the shortage of the air. There was also the problem of having to do it.

Further, there is a problem in that the work of connecting the pressure equalizing plate 10 and the side plate 20 to each other by spot welding or screwing is time-consuming and costly.

The present invention is intended to solve the above-mentioned conventional problems, and an object thereof is to provide a burner unit in which air supplied from a combustion fan is evenly distributed to a burner to facilitate assembly work. Especially.

[0010]

[Means for Solving the Problems]

 The present invention is configured as follows to achieve the above object. That is, the burner unit of the present invention has a frame body in which a plurality of burners arranged in parallel with each other with a gap therebetween are integrally held, and the lower plate is integrally formed from the lower end of the side plate of the frame body. The bottom plate is extended to cover the lower surface of the burner assembly, and this lower plate is characterized by being configured as a pressure equalizing plate that evenly distributes the air supplied from the fan to the gaps between the burners.

[0011]

[Action]

 The side plate of the burner frame body for integrally holding the plurality of burners with a gap therebetween and the lower plate connected to the side plate are integrally formed by one plate. This lower plate covers the lower surface of the burner frame, and distributes the air supplied from the fan evenly in the gaps between the burners.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same reference numerals will be given to the same names as those in the conventional example, and detailed description thereof will be omitted. What is characteristic in this embodiment is that the lower end of the side plate of the burner frame is integrally formed with the lower plate, and this lower plate is used as a pressure equalizing plate. Otherwise, the configuration is the same as that of the conventional example. .. FIG. 1 shows a burner unit according to a first embodiment of the present invention attached to a combustion apparatus. In the figure, the side plate 20 of the frame body 9 of the burner and the lower plate 22 extending from the lower end of the side plate 20 are integrally formed by one plate, and the lower plate 22 is a flat plate ( 6 (a)) or a plate having an inverted chevron shaped portion 17 ((b) of FIG. 6) is formed, and holes 14 are appropriately formed in the plate surface by a punch or the like. The lower plate 22 covers the lower surface of the assembly of the burners and is formed as the pressure equalizing plate 10 as in the conventional example.

According to the first embodiment, since the pressure equalizing plate 10 is formed integrally with the side plate 20 of the burner frame 9, the lower end portion 13 of the side plate 20 of the burner frame 9 and the lower end portion 13 of the burner frame 9 are made uniform. Since the portion 19 of the pressure plate 10 that overlaps with the end portion 11 is eliminated and the air resistance of this overlapping portion 19 is eliminated, the air supplied from the fan 1 is evenly distributed to the gap between the burners 3 by the pressure equalization plate 10. As a result, the pressure equalizing performance of the pressure equalizing plate 10 is improved. In addition, this eliminates the need to select a large fan.

Further, the pressure equalizing plate 10 is designed so that the air supplied from the fan 1 is preliminarily distributed in the gap between the burners 2 at the designing stage, and the pressure equalizing plate 10 is designed based on the design specifications. Since it is created, air can be evenly distributed by simply assembling the pressure equalizing plate 10 based on the design specifications, there is no displacement of the mounting position as in the past, and the labor for connecting the pressure equalizing plate 10 to the side plate 20 is also eliminated. This eliminates the need for the burner unit 21, which facilitates the assembling work of the burner unit 21 and reduces the working time and cost.

FIG. 2 shows a burner unit according to a second embodiment of the present invention attached to a combustion apparatus. What is characteristic of this embodiment is that the pressure equalizing plate 10, the burner frame 9 and the fan 1 are integrally formed into a unit. The other structure is the same as that of the first embodiment. In the figure, a holding frame 15 is provided downward on the peripheral end side of a pressure equalizing plate 10 formed integrally with the burner frame body 9, and the lower end side of the holding frame 15 is spot welded to the case 16 of the fan 1. Alternatively, it is attached by screwing or the like and connected to the combustion fan 1. As a result, the burner frame 9, the pressure equalizing plate 10 and the combustion fan 1 are integrated, so that the air supplied from the fan 1 is distributed by the pressure equalizing plate 10 to the gaps between the burners 2 as in the first embodiment. Since the pressure is evenly distributed and the work of assembling the burner unit 21 inside the combustion device only needs to attach the holding frame 15 to the frame body 23 of the combustion device, the work time is greatly shortened and the cost is reduced. Can be achieved.

The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, although the pressure equalizing plate 10 is formed with the hole 14 in the above-described embodiment, the hole may be formed as the slit 18 as shown in FIG. 3, or the slit 18 and the hole 14 may be used in combination.

[0017]

[Effect of the device]

 In the present invention, the side plate of the burner frame of the burner unit built into the combustion device and the pressure equalizing plate are integrally formed, so there is no overlap between the side plate of the burner frame and the pressure equalizing plate or the mounting position is different from the conventional case. The air supplied from the fan is evenly distributed by the pressure equalizing plate in the gap between the burners, and the pressure equalizing performance of the pressure equalizing plate is improved. Further, when assembling the pressure equalizing plate, the troublesome work of connecting the pressure equalizing plate and the side plate unlike the conventional case is not required, and the burner unit assembling work can be facilitated, the working time can be shortened, and the cost can be reduced. it can.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a burner unit of a combustion device according to a first embodiment.

FIG. 2 is an explanatory diagram of a burner unit of a combustion device according to a second embodiment.

FIG. 3 is a perspective view of a pressure equalizing plate of another structure of the burner unit according to the present invention.

FIG. 4 is an explanatory view of a burner unit of a conventional combustion device.

FIG. 5 is a cross-sectional view of a pressure equalizing plate of a burner unit of a conventional combustion device.

FIG. 6 is a partial perspective view of a pressure equalizing plate of the burner unit.

[Explanation of symbols]

 1 Fan 2 Burner 9 Burner frame 10 Pressure plate 20 Side plate 22 Lower plate

Claims (1)

[Scope of utility model registration request] 1. A frame having a plurality of burners, which are arranged in parallel with each other with a gap between them, and integrally holds the burner, wherein a lower plate is integrally extended from a lower end of a side plate of the frame. A burner unit that covers the lower surface of the burner assembly, and this lower plate is configured as a pressure equalizing plate that evenly distributes the air supplied from the fan to the gaps between the burners.