TW202242328A - Combustion device comprising a combustion housing, a burner arranged in the combustion housing, and an exhaust fan for suctioning/exhausting the combustion gas generated by the combustion of the burner - Google Patents

Abstract

An object of the present invention is to provide a combustion device comprising a burner arranged in the combustion housing (1) and an exhaust fan for suctioning/exhausting the combustion gas generated by the combustion of the burner. A visual hole (9) is provided on the side plate (11) of the combustion housing (1) to view the flame of the burner. Even if the transparent plate is not installed in the visual hole (9), it will not bring insecurity to the user and the cost can be reduced. The solution is that an inner plate disposed in the combustion housing (1) opposite to the inner surface of the side plate (11) of the combustion housing (1) is provided with a second visual hole (9') staggered from the visual hole (9) when viewed from the normal direction of the side plate (11). The visual hole (9) is observed from the direction inclined to the normal direction of the side plate (11) and the direction connecting the visual hole (9) with the second visual hole (9') so that the flame of the burner can be observed through the second visual hole (9').

Description

combustion device

The present invention relates to a combustion device, comprising: a combustion basket, a burner disposed in the combustion basket, and an exhaust fan for sucking and exhausting combustion gas generated by combustion of a mixture jetted from the burner.

Combustion device with a burner arranged in the combustion basket. In order to confirm the combustion state of the burner, a visual hole for viewing the flame of the burner is provided on a predetermined side plate of the combustion basket. Here, in the combustion apparatus that supplies the combustion air into the combustion basket by pushing the fan, it is necessary to prevent the combustion gas from leaking from the combustion basket to the outside. Here, conventionally, a heat-resistant transparent plate is attached to the viewing hole so that combustion gas does not leak through the viewing hole (for example, refer to Patent Document 1).

On the other hand, in a combustion device equipped with an exhaust fan (for example, refer to Patent Document 2), even if a transparent plate is not installed in the viewing hole opened in the side plate of the combustion basket, the combustion gas will not leak from the viewing hole. However, if only the viewing hole is provided in the side plate, there is a possibility of giving a sense of uneasiness to the user. Therefore, conventionally, even in a combustion apparatus equipped with an exhaust fan, a transparent plate is attached to the viewing hole, which causes cost increase. [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2002-333216 [Patent Document 2] Japanese Patent Laid-Open No. 2016-29316

[Problem to be solved by the invention]

In view of the above points, the present invention aims to provide a combustion device equipped with an exhaust fan, which can reduce the cost without giving a sense of uneasiness to the user even if the transparent plate is not installed in the viewing hole. [Technical means to solve the problem]

In order to solve the above-mentioned problems, the combustion device of the present invention includes: a combustion basket, a burner arranged in the combustion basket, and an exhaust fan for sucking and exhausting the combustion gas generated by the combustion of the mixed gas ejected from the burner. A sight hole for visually viewing the flame of the burner is provided on a predetermined side plate of the combustion basket, and it is characterized in that an inner plate provided in the combustion basket opposite to the inner surface of the predetermined side plate is provided with an opening from a predetermined When viewed from the normal direction of the side plate, it is the second viewing hole that is staggered to the position of the viewing hole, and the viewing hole is viewed from the direction that is inclined to the normal direction of the given side plate and connects the viewing hole and the second viewing hole, thereby The flame of the burner can be observed through the second sight hole.

According to the present invention, even if the user looks at the sight hole from a predetermined normal direction of the side plate, since the inside of the sight hole appears to be blocked, the user does not feel uneasy. When the user intends to check the combustion state of the burner and deliberately looks at the sight hole from the direction inclined as above with respect to the normal direction of the predetermined side plate, the flame of the burner can be visually observed. Therefore, even if the transparent plate is not attached to the viewing hole, it can function as a hole for checking combustion without giving a sense of uneasiness to the user. Moreover, the inner panel is something that has been installed in the past, so it will not become a cause of cost increase. As a result, it is possible to achieve cost reduction for the cost of saving the transparent plate.

Also, if the sight hole and the second sight hole are made larger, more air will be sucked in there, resulting in less combustion air that should be supplied by the suction force of the exhaust fan. On the other hand, if the sight hole and the second sight hole are made small, the visibility of the flame of the burner will deteriorate.

Therefore, in the present invention, a plurality of viewing holes are opened in the above-mentioned predetermined side plates, and a plurality of second viewing holes corresponding to the plurality of viewing holes are opened in the heat insulation board, and each second viewing hole is for each of the visual inspection holes. It is preferable that the misalignment direction and the misalignment amount of the holes are all the same. Thereby, even if each viewing hole and each 2nd viewing hole are small, the flame of a burner can be visually observed favorably through a plurality of viewing holes and a plurality of 2nd viewing holes.

With reference to Fig. 1 to Fig. 3, the combustion device of the embodiment of the present invention, possesses: combustion basket 1, the plural number (in this embodiment being 6) burner 2 that is arranged side by side in the lower part in combustion basket 1, for this The gas branch part 3 which supplies the fuel gas from the burner 2, and the heat exchanger 4 which is arranged in the upper part of the combustion basket 1 and is heated by the combustion gas from the burner 2. A water supply pipe 41 on the upstream side and a drain pipe 42 on the downstream side are connected to the heat exchanger 4 . Furthermore, a valve unit 5 for controlling the supply of fuel gas is connected to the gas branching portion 3 .

Taking the direction in which the burners 2 are arranged side by side as the horizontal direction, each burner 2 is a flat burner having an elongated burner portion at the upper end in the horizontal direction perpendicular to the horizontal direction, that is, in the front-rear direction. At the lower portion of each burner 2, a mixing pipe portion 21 is provided. At the front end of the mixing tube part 21, an inflow port 22 opened in front is provided. In the gas branch portion 3 , nozzles 31 for injecting fuel gas from the front toward the inflow port 22 of the mixing pipe portion 21 of each burner 2 are protruded in plural corresponding to the plurality of burners 2 . The fuel gas injected from each nozzle 31 flows in together with primary air into the inflow port 22 of each burner 2 , and a mixed gas of the fuel gas and primary air is generated in the mixing pipe portion 21 . Then, the mixed gas is ejected from the burner portion of the burner 2 and burned, and the heat exchanger 4 is heated by the combustion gas generated by the combustion.

The combustion basket 1 is composed of the following parts: a side plate 11 on the front side, which covers the front part of the combustion basket 1 located above the gas branch portion 3; side plates 12, 12 on both sides in the transverse direction; side plates on the rear side 13; bottom plate 14. In addition, heat insulating panels 15 , 16 , 17 for heat insulation are provided to face the inner surfaces of the side panels 11 , 12 , 13 on the front side, the lateral direction, and the rear side.

On the front portion of the bottom plate 14, there are formed: an erected plate portion 141 erected upward at the rear position of the gas diverging portion 3, and an upper plate portion 142 bent forward from the upper end of the erected plate portion 141 to reach the front side plate 11. . The opening 143 facing the inlet 22 of the mixing tube 21 of each burner 2 is provided in the standing plate 141 . And, on the front of the vertical plate portion 141, the ventilation adjustment plate 6 is arranged, and it faces the inflow port 22 of the mixing tube portion 21 of each burner 2 so that the openings 61 for fuel gas and primary air to pass through correspond to a plurality of The burner 2 is provided in plural.

In addition, the ventilation adjustment plate 6 is fixed to the vertical plate portion 141 by screws 62 at the upper end portion of the central portion in the lateral direction. In addition, the bottom plate 14 sandwiches the lower edges of the burners 2 from both sides in the lateral direction, and a plurality of upward depressions 144 are formed, and many small holes 145 are formed therein.

On the upper end of the combustion basket 1 , an exhaust fan 7 is connected through an exhaust hood 71 . A fan motor 72 is attached to the exhaust fan 7 . The combustion gas passing through the heat exchanger 4 is sucked by the exhaust fan 7 , and the combustion gas is discharged to the outside through an exhaust pipe (not shown) connected to the outlet 73 of the exhaust fan 7 . And, combustion air is supplied to each burner 2 by the suction force of the exhaust fan 7 . That is, the air sucked from the inlet 22 through the openings 61 of the ventilation adjustment plate 6 and the openings 143 of the standing plate 141 is supplied to the burners 2 as primary air for combustion, and The air sucked by the holes 145 is supplied to each burner 2 as secondary air for combustion.

On the side plate 11 of the front side of the combustion basket 1, an electrode part 8 is installed, which has: an ignition electrode 81 for igniting the burner 2, and a frame rod 82 for detecting the flame of the burner 2. On the side plate 11 on the front side, there is further provided a viewing hole 9, which is located at the part away from the installation place of the electrode part 8 to one side in the lateral direction (viewed from the front to the right), so that the flame of the burner 2 can be visually observed. Hereinafter, the viewing hole 9 will be described in detail with reference to FIG. 4 .

Three viewing holes 9 are provided at the vertices of an inverted triangle in the normal direction of the front side plate 11 , that is, when viewed from the front. And, on the heat shield 15 facing the inner surface of the side plate 11 on the front side, three second viewing holes 9' are opened in such a way that they are located at the apexes of the same inverted triangle as the above-mentioned inverted triangle (see Fig. 3 and Fig. 3 ). 4). Each of the 2nd viewing holes 9' is misaligned obliquely to the lower left for each viewing hole 9 when viewed from the front. All the displacement directions and displacement amounts of the respective second viewing holes 9′ with respect to the respective viewing holes 9 are the same.

Thereby, even if the user looks at the viewing hole 9 from the front, since the inside of the viewing hole 9 appears to be blocked, the user does not feel uneasy. When the user wants to confirm the combustion state of the burner 2, he deliberately observes the visual inspection from the direction inclined to the front-rear direction (the normal direction of the side plate 11 on the front side) and connects each viewing hole 9 with the second viewing hole 9′. In the case of the hole 9, the flame of the burner 2 can be seen visually. Therefore, even if a transparent plate is not attached to the viewing hole 9, the user can function as a hole for checking combustion without giving a sense of uneasiness to the user. Moreover, since the heat shield 15 is already installed, it does not cause cost increase. As a result, it is possible to achieve cost reduction for the cost of saving the transparent plate.

However, it is also considered that the sight hole 9 and the second sight hole 9' are each constituted as a single large hole to improve the visibility of the flame of the burner 2 . However, in this case, the air sucked in through the sight hole 9 and the second sight hole 9' will increase, and the combustion air that should be supplied by the suction of the exhaust fan 7 decreases. On the other hand, in the present embodiment, the following effects are exhibited by providing a plurality of the viewing holes 9 and the second viewing holes 9′ respectively. That is, even if each viewing hole 9 and the second viewing hole 9' are made smaller so as not to interfere with the suction of the combustion air, a plurality of viewing holes 9 and a plurality of second viewing holes 9' can be used to satisfactorily Visually observe the flame of burner 2.

As mentioned above, although embodiment of this invention was described referring drawings, this invention is not limited to this. For example, in the above-mentioned embodiment, although the viewing hole 9 is opened in the side plate 11 on the front side of the combustion basket 1, the viewing hole may also be opened in the side plate 12 in the lateral direction or the side plate 13 on the rear side. In addition, in the above-mentioned embodiment, the present invention is applied to the combustion device for hot water supply, but the present invention can be similarly applied to the combustion device for purposes other than hot water supply as long as it is equipped with an exhaust fan.

1: Burning Basket 11: Side panels on the front side (predetermined side panels) 15: heat shield 2: Burner 7:Exhaust fan 9: Sight hole 9´: 2nd sight hole

[ Fig. 1 ] A perspective view of a combustion device according to an embodiment of the present invention. [Fig. 2] A cutaway side view of Fig. 1 taken along line II-II. [FIG. 3] A sectional view taken along line III-III of FIG. 2. [ Fig. 4 ] An enlarged front view of the main part of the combustion device of the embodiment.

1: Burning Basket

9: Sight hole

9': the second sight hole

11: Side panels on the front side (predetermined side panels)

Claims (2)

A combustion device, comprising: a combustion basket, a burner arranged in the combustion basket, and an exhaust fan for sucking and exhausting the combustion gas generated by the combustion of the mixed gas ejected from the burner. The side plate is provided with a visual hole for viewing the flame of the burner, and its characteristics are: On the inner plate that is arranged in the combustion basket opposite to the inner surface of the predetermined side plate, there is a second sight hole that is staggered to the position of the sight hole when viewed from the normal direction of the predetermined side plate. View the sight hole in a direction in which the normal direction is inclined and connect the sight hole and the second sight hole, so that the flame of the burner can be observed through the second sight hole. The combustion device as described in Claim 1, wherein, the plurality of said viewing holes are opened in the aforementioned predetermined side plate, and the aforementioned second viewing holes corresponding to the plurality of viewing holes are opened in the aforementioned inner plate, and each second The misalignment directions and misalignment amounts of the sight holes with respect to the sight holes are all the same.

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