JP2530382Y2 - Water heater exhaust duct - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention relates to an exhaust duct for a water heater,
In particular, the present invention relates to an exhaust duct that is directly attached to an open end of an upper end of a can body of a heat exchanger in a water heater.

[0002]

2. Description of the Related Art In a recent outdoor water heater,
Despite the increase in hot water supply capacity, there is a remarkable demand for miniaturization of the entire appliance. For this reason, a forced blast type combustion device is employed for the purpose of securing a sufficient amount of combustion in a small combustion space. Further, the ratio of the cross section of the can body of the heat exchanger to the cross section of the casing is set to be large.

[0003] Under these circumstances, in recent water heaters,
As shown in FIG. 1, an exhaust duct (D) is covered on an open upper end of a can body (J) of a heat exchanger accommodated in a casing (K), and combustion exhaust is covered by the exhaust duct. K)
To the discharge section (P ₂ ) provided in the upper part of the front surface of the device. In the exhaust duct (D), the exhaust gas that has risen from the opening at the upper end of the can body (J) is once guided backward, then bends forward and is guided to the exhaust port (P ₁ ). Also, in order to ensure a sufficient exhaust cross-sectional area, the width of the cross-section of the exhaust duct (D) is arranged over almost the entire area of the casing (K), and the exhaust cross-sectional shape is a flat rectangular cross-section. Become.

In this type, the size of the exhaust duct (D) can be reduced, and the noise at the time of exhausting the combustion exhaust can be suppressed low. However, in the exhaust duct (D) with the above configuration, the can (J)
Since the path from the upper end opening to the exhaust port (P ₁ ) becomes sharply bent, the assembly of the exhaust duct (D) was troublesome. In particular, when each part of the exhaust duct (D) is made of a metal plate material in order to satisfy the heat resistance and the weight reduction, the assembly of each part becomes more troublesome.

[0005] The present invention has been made in view of the above-mentioned point, and is described as follows. "The rising exhaust from the can body (J) is temporarily covered by being covered by the open upper end of the can body (J) for the heat exchanger. In the exhaust duct of a water heater provided with an exhaust path that bends forward and then bends forward and discharges, when the respective parts are made of a metal plate material, it is possible to simplify the assembly thereof. I do.

[0006]

The technical means of the present invention for solving the above-mentioned problem is as follows: a rectangular box having a front opening part (11) and a lower opening part (12); The main body of the duct is designed so that the periphery of () is fixed to the open top of the can body (J).
(1), an inclined plate (21) which is installed between the left and right side walls in the duct main body (1) and rises rearward from the front edge of the lower opening (12), and a rear end thereof. A first straightening plate (2) provided with an arc-shaped portion (22) bent forward from above and a rear end (31) which contacts the front edge of the arc-shaped portion (22) from below. A second rectifying plate (3) which is inclined forward and downward between the left and right side walls in the duct main body (1); and a sloping plate located above and substantially parallel to the second rectifying plate (3). A portion (41) and an arc-shaped portion (42) that is substantially concentric with the arc-shaped portion (22) continuously from the rear end of the portion (41). A third rectifying plate (4) having a hanging plate portion (43) reaching the edge portion and being erected between left and right side walls in the duct main body (1), wherein the third rectifying plate (4) is 1st current plate (2) and 2nd current plate
(3) between the lower opening portion (12) and the rear of the first straightening vane (2), and then bends above the front edge of the second straightening vane (3) and The width of the exhaust passage (1
The first rectifying plate (2) has fixing side plates (23) (23) provided on both left and right ends of the first rectifying plate (2) screwed to the side wall of the duct main body (1) and fixed at a predetermined position in a predetermined posture. And the third rectifying plate
(4) are positioning plates (44) (44) provided at both ends of the inclined portion (41).
And the hanging plate portion (43) determines the posture of insertion into the duct main body (1), and the second rectifying plate (3) is formed to extend upward from both left and right ends and has a predetermined posture with respect to the inclined portion (41). In addition to the mounting side plates (32) and (32) which are set in the main part of the duct (1) together with the positioning plate (44), a screw fixing piece (33) penetrating both ends of the inclined portion (41) with a part of this It is fixed to the left and right side walls by screws. "

[0007]

The above technical means operates as follows. The third rectifying plate (4) is inserted from the lower opening portion (12) side of the duct main body (1) and mounted in the duct main body (1). At this time, the posture of the third rectifying plate (4) is determined by positioning plates at both ends of the inclined portion (41).
The mounting posture in the duct main body (1) is determined by (44) and the hanging plate part (43).

Next, the screwing piece (33) of the second rectifying plate (3) is inserted into and attached to the inside of the positioning plate (44) so as to protrude upward from both ends of the inclined portion (41). Screw (33) with the side plate (32) in contact with the inclined part (41)
And the positioning plate (44) are screwed to the side wall of the duct main body (1). As a result, the inclined portion (41) is attached to the mounting side plate (32).
And the second rectifying plate (3) are in a predetermined posture, and a passage having a constant width is formed between the two.

Thereafter, the second straightening plate is so arranged that the front edge of the arc-shaped portion (22) is in contact with the rear end (31) of the second straightening plate (3) from above.
(2) is inserted into the duct main body (1) and the mounting side plates (23) (23)
Screw on the side wall of the duct main body (1) to
The entire area of (12) communicates with the space between the arc-shaped portion (22) and the arc-shaped portion (42). As described above, the inclined portion (41) and the second rectifying plate (3) are directed rearward from the lower opening portion (12) and pass through the passage formed between the arc portion (22) and the arc portion (42). ), The exhaust passage (10) reaching the passage formed between the duct main body (1). When this is mounted on the can (J), the combustion exhaust gas of the can (J) passes through the exhaust passage (10) to the front edge of the inclined portion (41) and the second straightening plate (3). It is discharged from the outlet between the leading edges.

[0010]

[Effect] The third rectifying plate (4) is housed in the duct main body (1), and the first rectifying plate (2) and the second rectifying plate (3) are simply screwed to the side wall of the duct main body (1). Exhaust passage in duct main body (1)
Since (10) can be formed, the assembly of the exhaust duct (D) is simple.

[0011]

Next, the embodiment of the present invention will be described with reference to FIGS.
Will be described in detail. The exhaust duct (D) of this embodiment has an external appearance roughly as shown in FIG. Although the details of each part are not shown in the figure, the duct main body (1) is a box body with a cutout opening formed at the bottom of the front wall so that the entire lower area is open and connected to it. By closing the lower end of the cutout opening with the front edge of the first current plate (2), the front wall of the duct main body (1) has a rectangular front opening extending over substantially the entire width thereof. (11) is formed, duct main (1)
The entire area of the lower surface becomes a rectangular lower opening portion (12).

A flange piece (13) projects from the left and right sides and the rear side of the lower opening (12), and a hanging piece (14) hangs from the entire periphery thereof. As shown in FIG. 3, a horizontal piece (24) formed on the front edge of the first current plate (2) and the flange piece (13) are attached so as to be continuous, and this horizontal piece ( The hanging piece (25) provided on the front edge of the (24) is the hanging piece (14).
And continue. Therefore, a rectangular flange portion including a flange piece portion (13) and a horizontal piece (24) is formed around the lower opening portion (12), and the entire periphery of the flange portion is a hanging piece portion (14).
And a rectangular skirt portion consisting of the hanging piece (25).

The inner peripheral shape and size of this skirt portion match the outer peripheral shape and size of the flange portion (F) at the upper end of the can body (J). Can body
When externally fitted to the upper end of (J), the upper open end of the can (J) and the lower open part (12) substantially coincide with each other. The first current plate (2) is shown in FIG.
As shown in FIG. 5, an arc-shaped portion (22) which is bent upward from the rear end of the inclined plate portion (21) which is inclined so as to slightly rise backward with respect to the horizontal posture, is provided continuously, The mounting side plate (23) hangs from both left and right ends of the plate portion (21). A screw hole (27) is formed in the mounting side plate (23), and a projecting piece (26) of a constant width is horizontally provided on the lower side of the mounting side plate (23) and protrudes outward in the entire horizontal direction. .

A downwardly bent hanging wall (28) is continuously provided at the front edge of the inclined plate portion (21), and the horizontal piece (24) and the hanging piece (25) are provided at the lower end of the hanging wall (28). ) Are continuously installed. The horizontal piece (24) and the projecting piece (26) are set at the same position. Therefore, in the first straightening plate (2), the lower portion of the inclined plate portion (21) is surrounded by the mounting side plates (23) (23) at the left and right ends and the hanging wall (28) at the front edge. I have. In other words, the first current plate (2) is shaped like a rectangular shallow lid that opens downward and backward.

The length of the hanging piece (25) is determined by the duct main body (1).
The upper surface of the projecting piece (26) is flush with the flange piece of the duct main body (1).
When the both ends of the hanging piece (25) are brought into contact with the front edge of the hanging piece portion (14) (14) in contact with the lower surface of (13), the mounting posture and position of the first rectifying plate (2) are changed. Decided, in this state duct main (1)
When the mounting screw penetrating through the side wall is screwed into the screw hole (27), the first current plate (2) is fixed in the duct main body (1) in a predetermined posture.

Needless to say, the distance between the mounting side plates (23) is adjusted to the distance between the side walls of the duct main body (1). Next, as shown in FIG. 6, the third straightening plate (4) is provided with an arc-shaped portion (42) bent downward at the rear end of the inclined portion (41), and has a rear end at the lower end thereof. Bending boundary bend (4
A hanging plate portion (43) is continuously provided via 2a). At the lower end thereof, a backing plate (45) projecting rearward is provided. A guide piece (46) bent upward is connected to the front edge of the inclined portion (41), and the third rectifying plate (4) is connected to the duct main body (1).
In the state where the guide piece (46) is housed inside, the front end of the guide piece (46) protrudes forward from the front opening (11).

At both ends of the inclined portion (41), a duct mainly
Positioning plates (44) (44) having upper and vertical sides corresponding to the shape of the upper front part of the side wall of (1) are provided so as to protrude upward. When the third rectifying plate (4) is accommodated in the duct main body (1) so that the positioning plates (44) and (44) coincide with the upper front corner of the side wall of the duct main body (1). The contact plate (45) comes into contact with the lower surface of the flange piece (13) formed on the rear edge of the duct main body (1).

In the vicinity of the base end of the positioning plate (44), an inclined portion (4
Elongated holes (47) are formed at both ends of (1) along the positioning plate (44), and the length thereof substantially matches the width of a screwing piece (33) of a second rectifying plate (3) described later. Let me. Also, each positioning plate
A through hole (48) is formed in (44), and a protrusion (49) protruding inward is formed near the through hole (48). As described above, the third rectifying plate (4) is such that the positioning plates (44) and (44) are in contact with the upper front corner of the side wall of the duct main body (1), and
(45) is a flange piece connected to the rear edge of the duct main body (1)
When mounted so as to be in contact with (13), the posture of the third rectifying plate (4) with respect to the duct main body (1) becomes proper.

As shown in FIG. 7, the second rectifying plate (3) has a rear end (in the horizontal direction) from a flat main body parallel to the inclined portion (41) of the third rectifying plate (4). 31) will be established continuously,
A guide section (34) bent upward at the front edge of the main body section has an extended cross-sectional shape, and at both ends thereof, a side section between the guide piece (46) and the guide section (34) is closed. Inclined part (41) and second straightening vane
A mounting side plate (32) interposed between the main body of the second rectifying plate (3) and the inclined portion (41) is interposed between the mounting side plate (32) and the mounting side plate (32). The front upper end and the rear upper end of the portion to be contacted are in contact with the lower surface of the inclined portion (41). As a result, the degree of parallelism between the main portion of the second current plate (3) and the inclined portion (41) is ensured.

A screwing piece (33) projects upward from the rear of the mounting side plate (32). The screwing piece (33) has a screw hole (35) corresponding to the through hole (48) and a projection ( (49)
6) is formed. Then, the screw fixing pieces (33) (33) of the second current plate (3) are inserted into the long holes (47) (47) at both ends of the inclined portion (41).
The upper end of the mounting side plate (32) (32) is brought into contact with the lower surface of the inclined portion (41), and the positioning plate is inserted into the through hole (36).
Combining the projections (49) of (44) so as to fit them, the third rectifying plate
The second straightening plate (3) is positioned with respect to (4) and the screw holes (3
5) matches the through hole (48).

In the exhaust duct having the above construction, the second rectifying plate (3) and the third rectifying plate (4) combined in the above-described embodiment are accommodated in the duct main body (1), and the positioning plates (44) (44) are arranged. ) And hanging plate part (43)
As described above, the mounting position and mounting position of the third rectifying plate (4) are determined as described above, and through the mounting hole provided at a predetermined position on the side wall of the duct main body (1) through the through hole (48). When the screws are screwed into the screw holes (35) of the screwing pieces (33), the second rectifying plate (3) and the third rectifying plate (4) are fixed at predetermined positions in a predetermined posture.

On the other hand, the arc-shaped portion (22) is connected to the rear end (3
1) and the first current plate as described above.
(2) Position the screw hole (2
When the mounting side plates (23) and (23) are screwed to the side wall of the duct body (1) by using (7), the first rectifying plate (2) is fixed in the duct main body (1) in a predetermined state. In this state, a rectangular annular flange portion and a skirt portion are formed on the periphery of the lower opening portion (12).

When the thus constructed exhaust duct (D) is mounted and fixed to the flange at the upper end opening of the can body (J) via the packing (5) as shown in FIG. 3, the can body (J) Exhaust from the exhaust port (P ₁ ) between the guide part (34) and the guide piece (46) protruding from the front part of the duct main body (1) via the exhaust passage (10) in the exhaust duct (D) ). In this embodiment, the exhaust duct (D) is formed from a plurality of metal plate members.
Is formed, on the constituent wall of the exhaust passage (10), for example, both ends of the arc-shaped portion (42), both ends of the arc-shaped portion (22), and further, the horizontal piece (24) Slight gaps occur at the joint with the flange piece (13) .However, if these gaps are closed by applying caulking material with the exhaust duct (D) assembled, the gap from the exhaust passage (10) No exhaust leaks.

In this embodiment, the portion from the front of the inclined portion (41) of the third rectifying plate (4) to the guide piece (46) and (3)
The width of the front part is gradually reduced toward the tip, and accordingly, the mounting side plates (32) and (32) are also bent inward at the tip side to gradually narrow the exhaust passage (10). However, these portions may be linear. A front open portion (P ₃ ) communicating with a space between the second current plate (3) and the first current plate (2) is provided below the guide portion (34). A large number of burring holes (20) (20) penetrating vertically are formed in the front part of the inclined plate part (21) of (2). These burring holes (2
0) (20), a small amount of air is exhausted through the front opening (P
₃ ), which eliminates the inconvenience of exhaust sound resonance.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of the configuration of an exhaust duct (D) of a water heater.

FIG. 2 is an external perspective view of the exhaust duct (D) according to the embodiment of the present invention.

FIG. 3 is a sectional view of a main part in a state where it is mounted on a can body (J).

FIG. 4 is a front view of a second current plate (3).

FIG. 5 is a side view of the second current plate (3).

FIG. 6 is an explanatory view of a third current plate (4).

FIG. 7 is an explanatory view of a first current plate (2).

[Explanation of symbols]

 (J) ・ ・ ・ Can body (11) ・ ・ ・ Front open part (12) ・ ・ ・ Lower open part (1) ・ ・ ・ Mainly duct (21) ・ ・ ・ Inclination plate part (22) ・ ・ ・ Circle Arc-shaped part (2) ・ ・ ・ First rectifying plate (31) ・ ・ ・ Rear end (3) ・ ・ ・ Second rectifying plate (41) ・ ・ ・ Inclination part (42) ・ ・ ・ Circular part (43) ) ・ ・ ・ Drop plate (4) ・ ・ ・ Third straightening plate (10) ・ ・ ・ Exhaust passage (23) ・ ・ ・ Side plate (44) ・ ・ ・ Positioning plate (45) ・ ・ ・ Positioning piece (32 ) ・ ・ ・ Mounting side plate (33) ・ ・ ・ Screw fixing piece

Claims (1)

(57) [Scope of request for utility model registration] 1. A water heater having an exhaust path which is covered by an upper end open portion of a can body (J) for a heat exchanger, and which once bends upward exhaust air from the can body (J) backward and then bends forward. In this exhaust duct, a rectangular parallelepiped box having a front opening (11) and a lower opening (12) is formed, and the periphery of the lower opening (12) is fixed to the upper end opening of the can (J). A duct main body (1), and an inclined plate (21) that extends between the left and right side walls of the duct main body (1) and rises rearward from the front edge of the lower opening (12). A first current plate (2) having an arc-shaped portion (22) bent forward at the rear end thereof;
(22) a second end which is inclined forward and downward from a rear end (31) which is in contact with the front edge of the main body (22), and is installed between left and right side walls in the duct main body (1).
A straightening plate (3), an inclined portion (41) located above and substantially parallel to the second straightening plate (3), and substantially concentric with the arc-shaped portion (22) continuously to the rear end thereof. And a third straightening plate (4) having a hanging plate portion (43) extending from the arc portion (42) to the rear edge of the lower opening portion (12). The third rectifying plate (4) is provided between left and right side walls of the duct main body (1), and is provided between the first rectifying plate (2) and the second rectifying plate (3). 2) From the side of the lower opening (12) below the second straightening plate
An exhaust passageway (10) having a width corresponding to the width of the duct main body (1) is formed to be bent above the front edge of (3), and the first straightening plate (2) is formed.
The side plates (23) and (23) provided on the left and right ends of this
The third rectifying plate (4) is screwed to the side wall of (1) and fixed in a predetermined posture and position, and the third rectifying plate (4) is provided with positioning plates (44) (44) provided at both ends of the inclined portion (41) and a hanging plate. Positioning piece (4) which is provided at the lower end of the section (43) and which comes into contact with the rear end of the lower opening section (12) from below.
5) determines the posture of insertion into the duct main body (1),
The second rectifying plate (3) is provided with mounting side plates (32) (32) extending upward from both left and right ends thereof and for setting the posture with respect to the inclined portion (41) at a predetermined position. Department (41)
An exhaust duct for a water heater, in which screw fixing pieces (33) penetrating both ends of the duct are fixed to left and right side walls of the duct main body (1) together with a positioning plate (44).