JPH09105555A - Exhaust structure of gas hot water supplier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembling properties and further improve silencing properties. SOLUTION: Assembling parts of an exhaust passage 30 are integrally formed, which are mounted on an exhaust cover 22 to improve assembling properties. A side wall of the exhaust passage 30 is continuously molded to prevent a combustion sound from leaking to the outside and hence improve silencing properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas water heater in which exhaust gas discharged above a heat exchanger is passed through an exhaust passage and is guided to an exhaust outlet provided in front of the heat exchanger. Regarding exhaust structure.

[0002]

2. Description of the Related Art As an exhaust structure of a conventional gas water heater,
For example, there is one disclosed in Japanese Patent Publication No. 7-008986. That is, an exhaust collecting cylinder is provided above the heat exchanger, a perforated plate and a sound deadening plate are arranged above and below in the exhaust collecting cylinder, and exhaust gas is discharged into an exhaust passage which is a gap between the perforated plate and the sound deadening plate. The muffler that serves as the floor plate of the exhaust passage is inserted through the exhaust port, and the rear end of the muffler is attached to the inner wall of the exhaust collecting cylinder to muffle sound. The front end flange of the plate is screwed to the peripheral flange of the exhaust port, the perforated plate that is the ceiling plate of the exhaust passage is arranged along the ceiling of the exhaust collecting cylinder, and the rear end of the perforated plate is the rear wall of the exhaust collecting cylinder. The lower flange is screwed, and the front end flange of the perforated plate is screwed to the upper edge of the exhaust port.

[0003]

However, in such a conventional exhaust structure of a gas water heater, the sound deadening plate and the perforated plate, which are components of the exhaust passage, are separate bodies, and
The direction in which it is inserted into the exhaust stack is also different, and the number of assembly steps when installing the silencer plate and the perforated plate into the exhaust stack is large, and the assembling performance is poor, and the silencer plate and the porous plate are different. Since it is a body, it is difficult to integrally form the side wall of the exhaust passage continuously, combustion noise easily leaks to the outside through the gap formed in the side wall of the exhaust passage, and the quietness is not good, especially the gas water heater There was a problem that it was difficult to adopt it for the type that installed the main body inside the room. The present invention has been made in view of such a conventional problem, in which the exhaust passage assembly parts are integrally formed, and the integrally formed assembly parts are attached to the exhaust cover. An object of the present invention is to provide an exhaust structure for a gas water heater, which improves the assemblability and allows the side wall of the exhaust passage to be continuously molded so that the combustion noise does not easily leak to the outside and the quietness is improved. I am trying.

[0004]

The gist of the present invention for achieving the above object lies in the invention described in the following items. 1. Gas hot water supply in which exhaust gas discharged above the heat exchanger (20) is passed through an exhaust passage (30) and is guided to an exhaust outlet (32) provided in front of the heat exchanger (20). In the exhaust structure of a container, the upper part of the main body (21) of the heat exchanger (20) is formed into a box shape in which a lower opening (23) and a front opening (24) are continuously opened from bottom to front. The exhaust cover (2) is composed of a cover (22).
2) The exhaust passage (30) assembly is inserted into the exhaust passage (30) through the lower opening (23) and the front opening (24), and the exhaust passage (30) assembly includes a pair of upper and lower exhaust deflection upper plates (4).
0) and the exhaust deflection lower plate (50) are integrally formed, and the exhaust intake port (31) is opened at the lower end side thereof and the exhaust exhaust port (32) is opened at the front end side thereof. An exhaust structure for a gas water heater, which is characterized in that

2 The exhaust deflection upper plate (40) has a U-shaped cross section that is open downward and has both side wall portions (41), and the exhaust deflection lower plate (50) is open upward. The exhaust deflection upper plate (40) and the exhaust deflection lower plate (50) have both side walls (51) formed in a V-shaped cross section. 2. The exhaust structure for a gas water heater according to claim 1, wherein is fitted and fixed.

3 The front opening (2) of the exhaust cover (22)
4) has a mounting flange (25, 26, 27) at its peripheral portion, and at least one of the exhaust deflection upper plate (40) and the exhaust deflection lower plate (50) has the mounting flange (2).
5, 26, 27) attached flanges (43,
53) The exhaust structure for a gas water heater according to claim 1 or 2, further comprising:

4. At least one of the exhaust deflection upper plate (40) and the exhaust deflection lower plate (50) is a flange to be attached (fixed to the rear edge of the lower opening (23) of the exhaust cover (22) ( 45) The exhaust structure for a gas water heater according to any one of items 1, 2 and 3 above.

Next, the operation of the invention described in each of the above items will be described. The assembly part of the exhaust passage (30) integrally includes a pair of upper and lower exhaust deflection upper plates (40) and an exhaust deflection lower plate (50), in which case both side walls of the exhaust passage (30) are continuous. It is possible to prevent the combustion noise from leaking to the outside. In order to assemble the assembly parts of the exhaust passage (30) to the exhaust cover (22), the assembly parts may be inserted through the lower opening (23) and the front opening (24) of the exhaust cover (22). Thereby, the assembly parts of the exhaust passage (30) can be attached to the exhaust cover (22) at one time, and the number of assembling steps can be reduced.
The exhaust gas discharged above the heat exchanger (20) is guided to the exhaust outlet (32) through the exhaust passage (30).

In the exhaust structure for a gas water heater according to a second aspect of the present invention, the exhaust deflection upper plate (40) has a U-shaped cross-section that opens downward and has both side wall parts (41). The deflection lower plate (50) is formed in a U-shaped cross-section that opens upward and has both side wall portions (51).
Since both side wall portions (41) of the exhaust gas and the exhaust deflection lower plate (50) are fitted and fixed to each other, both side walls of the exhaust passage (30) are continuously formed. The combustion noise does not leak through the breaks, and the quietness can be improved.

In the exhaust structure of the gas water heater according to the third aspect, the peripheral portion of the front opening (24) of the exhaust cover (22) has a mounting flange (25, 26, 27), and the exhaust deflection upper plate. (40) or at least one of the exhaust deflection lower plate (50) has the mounting flanges (25, 26, 27).
Since it has the attached flanges (43, 53) fixed to the exhaust cover (22), when the assembly component of the exhaust passage (30) is assembled to the exhaust cover (22), the assembly component is attached to the lower opening (23) of the exhaust cover (22). And when it is passed through the front opening (24),
Exhaust cover (22) mounting flange (25, 26, 2)
It is sufficient to align the mounted flanges (43, 53) of the assembled parts along the line 7) and then fix the two together, which simplifies the assembling work.

In the gas water heater exhaust structure according to claim 4, at least one of the exhaust deflection upper plate (40) and the exhaust deflection lower plate (50) is the exhaust cover (22).
Since it has an attached flange (45) fixed to the rear edge of the lower opening (23), when the assembly part of the exhaust passage (30) is assembled to the exhaust cover (22), the assembly part is attached to the exhaust cover (45). 22) When the lower opening (23) and the front opening (24) are passed through, the lower opening (23) of the exhaust cover (22)
It is sufficient to align the mounted flange (45) of the assembly part along the rear edge portion of the assembly part, and then to fix the two together, which simplifies the assembling work.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. As shown in FIG. 22, the gas water heater 1 of this embodiment
0 has a bath reheating function, and a burner unit 12 for hot water supply, a burner unit 13 for bath, and a combustion fan for sending air to each burner unit 12, 13 are provided in the main body 11 of the gas water heater 10. 14 is installed inside, the space above each burner unit 12, 13 is a combustion chamber, and heat exchangers 20, 20a are arranged above the combustion chamber.

The heat exchangers 20 and 20a have almost the same structure, and the heat exchanger 20 will be described below as a representative and will be replaced with the description of the heat exchanger 20a. As shown in FIGS. 1 to 5 and FIG. 22, the upper part of the main body 21 of the heat exchanger 20 is constituted by an exhaust cover 22. The exhaust cover 22 is formed in a box shape in which a lower opening 23 and a front opening 24 are continuously opened from the lower side to the front side. An exhaust passage 30 is provided in the exhaust cover 22 for guiding exhaust gas discharged above the heat exchanger to an exhaust outlet provided in the front of the heat exchanger. The assembled parts of the exhaust passage 30 include the exhaust cover 2
2 is inserted through its lower opening 23 and front opening 24.

As shown in FIGS. 7 to 9, the exhaust cover 2
The upper flange 25 is formed on the upper edge of the front opening 24 of the second,
Side flanges 26 and 27 are formed on both side edges of the front opening 24. Exhaust top mounting holes 25a and 26a are formed in the upper flange 25 and the side flanges 26. Side flanges 28 are formed on both side edges of the lower opening 23 of the exhaust cover 22, and a rear flange 29 is formed on a rear edge of the lower opening 23. The side flange 28 and the rear flange 29 are provided with pilot holes 28a, 29a for attachment to the main body 21 of the heat exchanger 20. Further, the rear end edge of the rear flange 29 is bent downward, and a projection piece 29 b for positioning the exhaust deflection upper plate 40 described later.
Are formed. As shown in FIGS. 1 to 6, the assembly part of the exhaust passage 30 is formed by integrally forming a pair of upper and lower exhaust deflecting upper plates 40 and an exhaust deflecting lower plate 50, and an exhaust gas is provided on the lower end side thereof. An intake port 31 is opened, and an exhaust intake port 32 is opened on the front end side thereof.

As shown in FIGS. 15 to 17, the exhaust deflecting upper plate 40 is formed in a U-shaped cross section that opens downward and has both side wall portions 41. The exhaust deflection upper plate 40 is provided in the exhaust passage 3
The ceiling portion 42 serving as the ceiling of the ceiling 0 is inclined downward from the center in the front-rear direction toward the front, and the front edge of the ceiling portion 42 is spot-welded to the upper flange 25 and the side flanges 26 and 27. The mounting flange 43 is formed. The rear end portion of the ceiling portion 42 is smoothly continuous to the rear wall portion 44 via a bent portion having a large radius, and a mounted flange 45 spot-welded to the rear flange 29 is formed at the lower end portion of the rear wall portion 44. Has been done. As shown in FIGS. 10 to 12, the exhaust deflection lower plate 50 is formed in a U-shaped cross section that opens upward and has both side wall portions 51. Side wall portion 51
A flange 53 to be attached by spot welding to the side flanges 26 and 27 is formed on the side edge of the front side opening of the exhaust port, and a fitting portion formed by folding back the exhaust deflecting lower plate 50 into a substantially U shape. 54 is formed. The packing 60 is placed on the upper surface of the exhaust deflection lower plate 50, and the packing 60 is pressed from above by the packing pressing plate 65, and the rear end bent portion 66 of the packing pressing plate 65 is fitted so that the packing 60 does not fall off. The front end portion 67 of the packing pressing plate 65 is spot-welded to the exhaust deflection lower plate 50 while being fitted into the portion 54. The packing press plate 65 is provided with four substantially rectangular insertion holes 68.

Both side wall portions 41 of the exhaust deflection upper plate 40 and both side wall portions 51 of the exhaust deflection lower plate 50 are fitted and fixed by spots, whereby the side wall of the exhaust passage 30 is constituted and the exhaust gas is exhausted. The deflection upper plate 40 and the exhaust deflection lower plate 50 are configured to be integrally handleable. The side wall of the exhaust passage 30 is fitted into the side wall of the exhaust cover 22. An exhaust cover front plate 70 is spot-welded to the side flanges 26, 27 of the exhaust cover 22. The exhaust cover front plate 70 is bent into an L shape, and has a horizontal flange portion 71.
And a front flange portion 72, the front flange portion 72 is provided with a burring hole 72a for attaching the exhaust top, the rear end portion of the horizontal flange portion 71 is bent upward, and the bent portion 75 is The exhaust deflection lower plate 50 is supported from below. The rear end portion of the exhaust deflection lower plate 50 and the rear wall portion 44 of the exhaust deflection upper plate 40
The exhaust intake 31 is provided between and the exhaust deflection upper plate 4
An exhaust outlet 32 is formed between the front end edge of the zero ceiling portion 42 and the front end edge of the exhaust deflecting lower plate 50.

Next, the operation of the present invention will be described. When the exhaust deflecting upper plate 40 and the exhaust deflecting lower plate 50 are assembled to form an assembly part of the exhaust passage 30, the packing 60 of the exhaust deflecting lower plate 50 is placed in advance and the packing pressing plate 65 is placed.
Press the packing 60 with the
5 is fitted into the fitting portion 54 of the lower exhaust deflection plate 50, and the front end 67 is spot-welded to the exhaust passage 30. The exhaust deflection upper plate 40 and the exhaust deflection lower plate 50 are assembled by attaching the side wall portion 41 of the exhaust deflection upper plate 40 to the exhaust deflection lower plate 5.
It is fitted into the side wall portion 51 of No. 0, is positioned relative to each other, and is spot-welded to each other. As a result, both side walls of the exhaust passage 30 can be continuously formed without a break, and since there is no break, combustion noise does not leak through the break, and the quietness can be improved.

An exhaust inlet 31 is formed between the rear wall portion 44 of the exhaust deflection upper plate 40 and the fitting portion 54 of the exhaust deflection lower plate 50, and the front end edge of the exhaust deflection upper plate 40 and the exhaust deflection lower plate 40 are formed. Board 5
An exhaust outlet 32 is formed between the front end edge of 0 and the front edge. To assemble the assembly parts of the exhaust passage 30 to the exhaust cover 22, as shown in FIG. 1, the exhaust deflecting upper plate 40 is turned up and the exhaust cover 20 is passed through the lower port 23 and the front port 24 from below. do it. At this time, the side wall of the exhaust passage 30 is fitted into the side wall portion of the exhaust cover 22, and the rear wall portion 44 of the exhaust deflection upper plate 40 is fitted into the rear wall portion of the exhaust cover 22.

The upper flange 25 of the exhaust cover 22
And the attached flange 43 of the exhaust deflection upper plate 40 and the attached flange 53 of the exhaust deflection lower plate 50 abut against the side flanges 26 and 27, and the exhaust deflection upper plate 40 is attached to the projection piece 29b of the exhaust cover 22. The abutment of the flange 45 enables relative positioning of the exhaust cover 22 and the assembly in the front-rear direction. Next, the mounting lower hole of the exhaust deflection upper plate 40 is aligned with the exhaust top mounting hole 25a of the exhaust cover 22, and the mounted flange 45 of the exhaust deflection upper plate 40 is attached to the rear flange 29 of the exhaust cover 22 from below. If they are abutted, the exhaust cover 22 and the assembly parts can be positioned relative to each other in the vertical direction and both side directions.

Next, the upper flange 25 of the exhaust cover 22.
If the mounted flange 43 of the exhaust deflection upper plate 40 is spot-welded to the side flanges 26 and 27 and the mounted flange 45 of the exhaust deflection upper plate 40 is spot-welded to the rear flange 29 of the exhaust cover 22, the exhaust passage 30 assembly parts can be attached to the exhaust cover 22 at a time, and the number of assembling steps can be significantly reduced. Next, the exhaust cover 2
The horizontal flange portion 71 of the exhaust cover front plate 70 is abutted against the side flanges 26 and 27 of the second exhaust port 2 to attach the exhaust top mounting hole 2
The burring hole 72a for attaching the exhaust top is aligned with 6a and spot welded to each other. Thus, the bent portion 75 of the exhaust cover front plate 70 supports the exhaust deflection lower plate 50 from below.

Next, as shown in FIG. 22, the exhaust top is attached to the exhaust outlet 32 of the exhaust passage 30. The outer peripheral flange of the exhaust top is fixed by a screw that is screwed into the exhaust top mounting hole 25a of the exhaust cover 22 and the exhaust top mounting burring hole 72a of the exhaust cover front plate 70. In the exhaust structure configured as described above, the exhaust gas discharged upward through the heat exchanger is taken into the exhaust intake port 31, passed through the exhaust passage 30, and guided to the exhaust intake port 32 to pass through the exhaust top. After that, it is discharged to the outside of the main body. In addition, in the above-described embodiment, a mounting flange is formed on the peripheral portion of the front opening 24 of the exhaust cover 22,
Although the mounting flange is formed on the rear edge of the lower opening 24, the mounting flange may be formed on the side wall of the exhaust cover 22 to fix the assembly parts of the exhaust passage 30 to the exhaust cover 22 side. Good.

[0022]

According to the exhaust structure of the gas water heater of the present invention, the assembly parts of the exhaust passage are integrally formed, and the integrally formed assembly parts are mounted on the exhaust cover. It is possible to enhance the assemblability, continuously mold the side wall of the exhaust passage, make it difficult for the combustion noise to leak to the outside, and improve the quietness.

[Brief description of the drawings]

FIG. 1 is an exploded front view of an exhaust cover and an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 2 is a front view of an exhaust cover and an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 3 is a side view of an exhaust cover and an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 4 is a plan view of an exhaust cover and an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 5 is a plan view of an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 6 is a side view of an assembly component of an exhaust structure showing an embodiment of the present invention.

FIG. 7 is a front view of an exhaust cover showing an embodiment of the present invention.

FIG. 8 is a side view of the exhaust cover showing the embodiment of the present invention.

FIG. 9 is a plan view of an exhaust cover showing an embodiment of the present invention.

FIG. 10 is a front view of the exhaust deflection lower plate showing the embodiment of the present invention.

FIG. 11 is a side view of the exhaust deflection lower plate showing the embodiment of the present invention.

FIG. 12 is a plan view of an exhaust deflection lower plate showing an embodiment of the present invention.

FIG. 13 is a plan view of a packing pressing plate showing an embodiment of the present invention.

FIG. 14 is a general cross-sectional view of a packing pressing plate showing an embodiment of the present invention.

FIG. 15 is a plan view of an exhaust deflection upper plate showing an embodiment of the present invention.

FIG. 16 is a front view of the exhaust deflection upper plate showing the embodiment of the present invention.

FIG. 17 is a side view of the exhaust deflection upper plate showing the embodiment of the present invention.

FIG. 18 is a plan view of the exhaust cover front plate showing the embodiment of the present invention.

FIG. 19 is a side view of the exhaust cover front plate showing the embodiment of the present invention.

FIG. 20 is a front view of the exhaust cover front plate showing the embodiment of the present invention.

FIG. 21 is a front view of the exhaust cover and the exhaust top showing the embodiment of the present invention.

FIG. 22 is a perspective view of a gas water heater showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Gas water heater 11 ... Main body of gas water heater 12 ... Burner unit for hot water supply 13 ... Burner unit for bath 14 ... Combustion fan 20 ... Heat exchanger 21 ... Main body 22 ... Exhaust cover 23 ... Lower port 24 ... Front port 25 ... Upper flange 26 ... Side flange 28 ... Side flange 29 ... Rear flange 30 ... Exhaust passage 31 ... Exhaust inlet 32 ... Exhaust outlet 40 ... Exhaust deflecting upper plate 41 ... Side wall 42 ... Ceiling 43 ... Attached Flange 44 ... Rear wall part 45 ... Attached flange 50 ... Exhaust deflection lower plate 51 ... Side wall part 53 ... Attached flange 54 ... Fitting part 60 ... Packing 65 ... Packing retainer plate 66 ... Rear end bent part 70 ... Exhaust cover Front plate 71 ... Horizontal flange 72 ... Front flange

Claims (4)

[Claims] 1. An exhaust structure of a gas water heater in which exhaust gas discharged above a heat exchanger is passed through an exhaust passage and is guided to an exhaust outlet formed in a front surface of the heat exchanger. The upper part of the main body of the exchanger is constituted by an exhaust cover formed in a box shape in which a lower opening and a front opening are continuously opened from the lower side to the front side. An assembly part is inserted and attached, and the assembly part of the exhaust passage is formed by integrally forming a pair of upper and lower exhaust deflection upper plates and an exhaust deflection lower plate. An exhaust structure for a gas water heater, characterized in that the exhaust outlet is opened on the front end side thereof. 2. The exhaust deflection upper plate is formed to have a U-shaped cross section opened downward and has both side wall portions, and the exhaust deflection lower plate is formed to have a U-shaped cross section opened upward. 2. The gas water heater according to claim 1, further comprising both side wall portions, wherein both side wall portions of the exhaust deflection upper plate and both side wall portions of the exhaust deflection lower plate are fitted and fixed to each other. Exhaust structure. 3. The front edge of the exhaust cover has a mounting flange, and at least one of the exhaust deflection upper plate and the exhaust deflection lower plate has a mounted flange fixed to the mounting flange. The exhaust structure for a gas water heater according to claim 1 or 2. 4. The at least one of the exhaust deflection upper plate and the exhaust deflection lower plate has a mounted flange fixed to a rear edge portion of a lower opening of the exhaust cover. Alternatively, the exhaust structure of the gas water heater according to the above item 3.