JP2527171Y2 - Top structure of supply / exhaust of forced supply / exhaust type combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a supply / exhaust top structure of a forced supply / exhaust type combustion device.

(B) Prior art In recent years, as one form of the supply / exhaust top structure of a forced supply / exhaust type combustion device, for example, when the combustion device is a water heater, there is one as shown in FIGS. 6 and 7.

Such a top structure is substantially equivalent to a through hole provided in the wall 1.
An exhaust cylinder 3 is provided concentrically within a supply cylinder 2 extending laterally through 1a, and a supply hole 4 is provided at a tip end side of the supply cylinder 2 to communicate the inside of the supply cylinder 2 with outside air. An exhaust port 5 is provided on a lower peripheral surface of the exhaust pipe 2, and a distal end opening of the exhaust pipe 3 is connected to a peripheral edge of the exhaust port 5 so that the exhaust pipe 3 communicates with the outside air.

 Reference numeral 7 denotes a bird-proof plate installed in front of the air supply hole 4.

With this structure, the direction of the streamline of the exhaust gas discharged downward from the exhaust port 5 through the exhaust path 6 and the direction of the streamline of the air sucked from the air supply hole 4 provided at the tip end surface of the air supply cylinder 2 are defined. Since the exhaust gas is made different and separated, the exhaust gas is not supplied from the air supply hole 4, and it is possible to prevent the occurrence of a problem that the exhaust gas is supplied to the combustion chamber of the water heater and combustion failure occurs. . In FIG. 6, L indicates the extension distance from the wall 1 to the tip of the supply cylinder 2.

(C) Problems to be solved by the invention However, the above-described top supply / exhaust structure of the forced supply / exhaust-type combustion device still has the following problems to be solved.

That is, as shown in FIG. 6 and FIG. 7, the supply / exhaust top structure in which the tip of the air supply cylinder 2 protrudes from the tip of the exhaust cylinder 3 has a length defined by gas detection, that is, exhaust from the wall 1. Cylinder 3
In addition to the distance from the end of the exhaust tube 3 to the end of the supply cylinder 2, it must be extended from the wall 1, and as shown in FIG. 6, the extension distance L becomes longer. Therefore, it was not aesthetically pleasing.

In order to solve this, the tip of the exhaust cylinder 3 is made to protrude more than the tip of the supply cylinder 2, and the supply passage formed between the supply cylinder 2 and the exhaust cylinder 3 is formed at the tip of the supply cylinder 2. A structure for opening is conceivable.

However, such a structure has a problem in that the combustion state becomes unstable due to rainwater entering from the air supply passage.

The present invention shortens the extension distance L from the wall 1 to maintain aesthetic appearance, prevent rainwater from entering the air supply passage as much as possible, and ensure a stable combustion state. It is an object of the present invention to provide a supply / exhaust top structure of an exhaust combustion device.

(D) Means for Solving the Problems In the present invention, an exhaust cylinder is provided concentrically within a supply cylinder extending in the lateral direction to form a double pipe, and the tip of the exhaust cylinder is projected from the tip of the supply cylinder. In addition, in the supply / exhaust top structure of the forced supply / exhaust type combustion device in which the supply passage formed between the supply cylinder and the exhaust tube is opened at the leading end of the supply cylinder, the supply passage passes through the supply passage in the supply passage. A forced air supply / exhaust type wherein a flow path deflecting section for deflecting the flow of air to be supplied is provided, wherein the flow path deflecting section deflects the air flowing in the axial direction of the air supply passage in the circumferential direction of the air supply cylinder. The present invention relates to a supply / exhaust top structure of a combustion tool.

Also, in the present invention, the flow path deflecting unit has a first deflecting plate and a second deflecting plate located downstream of the first deflecting plate on the air supply path. It is also characterized in that the air that has flowed in without being deflected by the first deflector is deflected.

(E) Function and effect With the above-described configuration, the present invention has the following function and effect.

In the air supply path, a flow path deflecting section that deflects the flow of air passing through the air supply path is provided, so that air, which is gas, is guided downstream of the air supply path, while rainwater, which is liquid, adheres to the flow path deflecting section. Thus, intrusion of rainwater into the downstream side of the air supply passage can be prevented as much as possible, and a stable combustion state can be obtained.

Further, the extension distance from the wall to the exhaust pipe can be shortened, and the appearance is not impaired.

The flow path deflecting unit deflects the air flowing in the axial direction of the air supply passage in the circumferential direction of the air supply cylinder. Rainwater mixed into the air supply passage can be prevented as much as possible.

When the flow path deflecting unit is constituted by a deflecting plate, a gap must be provided between the deflecting plate and the air supply / exhaust cylinder in order to prevent the air supply flow path from being completely closed, and rainwater enters from the gap. Although the possibility increases, the present invention deflects the air that has flowed in without being deflected by the first deflector, that is, the air flow including rainwater that has passed through the gap, by the second deflector, so Rainwater intrusion can be prevented as much as possible from the gap between the air supply and exhaust cylinders.

(F) Example Hereinafter, the present invention will be specifically described based on an example shown in the accompanying drawings. In this embodiment, a description will be given using a water heater as a combustion tool.

As shown in FIG. 1, the air supply / exhaust top structure A has a double pipe structure composed of concentric air supply cylinders 12 and exhaust cylinders 17, and its tip is slightly outside the wall W to the outside. The base end is connected to a water heater C installed indoors via a supply / exhaust communication pipe 10 bent in an L-shape.

2 to 4 show a detailed configuration of the air supply / exhaust top structure A. A hollow cylindrical air supply cylinder 12 has a hollow cylindrical air supply cylinder 12 in a top structure insertion hole 11 pierced through the wall W. The tip of the same supply cylinder 12 is slightly downwardly inclined toward
It protrudes slightly forward from the front surface 13 of the wall W by a length l.

The supply cylinder 12 has a rear end extending rearward from a rear surface 14 of the wall W, and an extended end 15 connected to one end of the supply / exhaust communication pipe 10.

Further, the air supply cylinder 12 has an annular flange
The annular flange 16 is fixed to the rear surface 14 of the wall W.
By using bolts or the like, the air supply cylinder 12 can be fixedly attached to the wall surface W.

Next, the internal configuration of the air supply cylinder 12 will be described. In the air supply cylinder 12, a hollow cylindrical exhaust cylinder smaller in diameter than the air supply cylinder 12 is provided.
17 are arranged concentrically.

Further, the exhaust pipe 17 has a tip 17a which is the tip 12a of the air supply cylinder 12.
It is projected slightly forward, and the bird net 2
0 is installed.

With such a configuration, the top structure A according to the present embodiment
The air supply path 18 having an annular cross section can be formed between the air supply cylinder 12 and the exhaust pipe 17, and the exhaust path 19 having a circular cross section can be formed in the exhaust pipe 17.

Accordingly, the combustion air a is supplied to the air supply passage 18 and the air supply / exhaust communication pipe.
It can be supplied to water heater C through 10 and
The exhaust gas b after combustion can be discharged to the outside through the supply / exhaust communication pipe 10 and the exhaust path 19.

The gist of the present invention is that in the above configuration, the air supply path
A flow path deflecting section for deflecting the flow of the air passing through the air supply path 18 is provided in the air flow path 18, and the flow path deflecting section includes first and second deflecting plates. In addition, such a deflection plate,
In this embodiment, the first and second rainwater prevention plates 21 and 22 are provided on the outer peripheral surface of the exhaust pipe 17 and away from the front end of the air supply passage 18 as shown in FIG. Prevention plate
21 and the first
A second rainwater prevention plate 22 is attached at a position spaced rearward in the axial direction from the rainwater prevention plate 21.

As shown in FIGS. 3 and 4, each of the first and second rainwater prevention plates 21 and 22 is formed by an annular band plate having support ribs 21c and 22c on the periphery. 21,2
Air communication passages 23 and 24 are formed between the outer peripheral edge of 2 and the inner surface of the air supply cylinder 12, respectively.

With this configuration, as shown in FIG. 2, the combustion air a is supplied to the air supply passages via air communication passages 23 and 24 formed between the rainwater prevention plates 21 and 22 and the inner peripheral surface of the air supply cylinder 12. The rainwater prevention plates 21 and 22 functioning as weirs can surely prevent rainwater from flowing into the air supply passage 18 of the top structure A, while ensuring a stable combustion state. Can be obtained. That is, while guiding the air that is gas to the downstream of the air supply passage 18, the rainwater that is the liquid adheres to the rainwater prevention plates 21 and 22 to prevent rainwater from entering the downstream side of the air supply passage 18 as much as possible. Can be done. Further, in order to deflect the air flowing in the axial direction of the air supply passage 18 in the circumferential direction of the air supply cylinder 2, the inflow air is deflected at right angles to the circumferential direction from the axial direction of the air supply passage 18. It is possible to prevent the mixed rainwater from reaching the downstream side of the air supply passage 18 as much as possible.

In addition, simply by the cooperation of the first and second rainwater prevention plates 21 and 22, rainwater can be reliably prevented from entering the top structure A with a simple structure, and the supply / exhaust top structure A can be inexpensively manufactured. Can be manufactured.

Furthermore, since the first and second rainwater prevention plates are provided on the outer peripheral surface of the exhaust pipe 17 in the axial direction, air supply and exhaust can be performed from the same direction. l
Can be remarkably shorter than the conventional top structure, and the aesthetic appearance of the building can be improved.

FIG. 5 shows the structure of a supply / exhaust top structure A according to another embodiment, which is substantially the first and second rainwater prevention plates 21 and 22.
Are respectively provided on the outer peripheral surface of the exhaust pipe 17 in the circumferential direction with gaps 21a,
It is formed by a plurality of arc-shaped strips 21b, 22b attached via a 22a.

The arc-shaped strips 22b of the second rainwater prevention plate 22 are respectively
It is attached at a position axially coincident with the gap 21a of the rainwater prevention plate 21, and an arc-shaped strip 22b of the second rainwater prevention plate.
The circumferential length e of the arc-shaped strip 21b of the first rainwater prevention plate 21
Is longer than the length f of the gap 21a.

With this configuration, air supply can be further promoted without impairing the rainwater intrusion prevention effect.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the use state of the supply / exhaust top structure according to the present invention, FIG. 2 is an enlarged partial side sectional view of the supply / exhaust top structure,
3 is an exploded perspective view of the air supply / exhaust top structure of FIG. 2, FIG. 4 is an exploded perspective view of the air supply / exhaust top structure according to another embodiment, FIG. FIG. 6 is a cross-sectional side view of a conventional air supply / exhaust top structure, and FIG. 7 is a view taken along the line II-II in FIG. In the figure, (A): Top structure of air supply and exhaust (12): Air supply cylinder (17): Exhaust cylinder (18): Air supply passage (19): Exhaust passage (21): First rainwater prevention plate (22): No. 2 Rainwater prevention plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Miura 431-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Prefecture Inside Japan Yupro Co., Ltd. (72) Hisashi Nakamura 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo In Japan Yupro Co., Ltd. (56) Reference: Japanese Utility Model Showa 60-86746 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] An exhaust pipe (17) is provided concentrically within a supply cylinder (12) extending laterally to form a double pipe,
The distal end of the exhaust cylinder (17) protrudes from the distal end of the air supply cylinder (12), and the air supply path (18) formed between the air supply cylinder (12) and the exhaust cylinder (17) is on the distal side of the air supply cylinder (12). In the supply / exhaust top structure of the forced supply / exhaust type combustion device opened at the above, a flow path deflecting section for deflecting the flow of air passing through the supply path (18) is provided in the supply path (18). The supply / exhaust top structure of a forced supply / exhaust type combustion device, wherein the flow path deflecting unit deflects air flowing in an axial direction of the air supply passage (18) in a circumferential direction of the air supply cylinder (12). 2. The flow path deflecting section includes a first deflecting plate and a first deflecting plate.
And a second deflecting plate located downstream of the air supply passage (18) from the deflecting plate, and the second deflecting plate deflects the air that has flowed in without being deflected by the first deflecting plate. The supply / exhaust top structure of a forced supply / exhaust type combustion device according to claim 1, characterized in that: