JPH0622743U - Exhaust duct of water heater - Google Patents

Abstract

(57) [Summary] [Purpose] An exhaust passage with a flat cross-section is formed in a rectangular parallelepiped duct main body that is connected to the upper open end of the can body of the heat exchanger of the water heater. In the exhaust duct, the passage is constructed so as to be biased to the rear part from the upper end part of the can body and then bent forward, so that it is easy to assemble each part of the metal plate forming the exhaust passage into the duct main body. To convert. [Structure] An inner peripheral wall surface of the exhaust passage (10) along the exhaust flow is composed of an upstream first straightening plate (2) and a downstream second straightening plate (3), and on the other hand, along the exhaust flow. The outer wall is the third straightening plate (4)
The second straightening plate (3) and the third straightening plate
(4) is housed in the duct main body (1) from the lower opening (12) in a state of being positioned, and the second rectifying plate (4) and the duct main body (1) are in a state of being positioned in the second section. The side plates (32) (32) at the left and right ends of the straightening vane (3) are screwed to the side wall of the duct main body (1), and the first straightening vane (2) is positioned in relation to the duct main body (1). Similarly, screw it to the side wall of the duct main body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an exhaust duct of a water heater, and more particularly, to an exhaust duct directly attached to an open upper end of a can of a heat exchanger in the water heater.

[0002]

[Prior art and problems]

 With the recent outdoor water heaters, there is a significant demand for downsizing of the entire equipment, despite the fact that the hot water supply capacity is high. For this reason, a compulsory blower type combustion device is used to ensure a sufficient amount of combustion in a small combustion space. In addition, 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.

Due to such circumstances, in the recent hot water supply device, as shown in FIG. 1, the exhaust duct (D) is provided at the upper open end of the can body (J) of the heat exchanger housed in the casing (K). The exhaust duct (P) ₂ ). In this exhaust duct (D), the exhaust gas that has risen from the open upper end of the can body (J) is once guided to the rear and then bent forward to the exhaust port (P₁). In addition, in order to secure a sufficient exhaust cross-sectional area, the cross-sectional width of the exhaust duct (D) is to be 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 exhaust duct (D) can be downsized, and the noise at the time of exhausting combustion exhaust can be suppressed low. However, in the exhaust duct (D) with the above configuration, the path from the open upper end of the can body (J) to the exhaust port (P ₁ ) is abruptly bent, so this exhaust duct (D) It was troublesome to assemble. 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, it becomes more troublesome to assemble each part.

The present invention has been made in view of the above point, and it is described that “the rising exhaust gas from the can body (J) for the heat exchanger is temporarily capped at the upper open end portion to the rear side. In the exhaust duct of a water heater equipped with an exhaust path that bends to the front and then bends to the front, it is possible to simplify the assembly of each part when it is made of metal plate material. It is an issue.

[0006]

[Technical means]

 The technical means of the present invention for solving the above-mentioned problem is to form a rectangular parallelepiped box body having a front opening portion (11) and a lower opening portion (12) and a peripheral edge of the lower opening portion (12). The duct main body (1) fixed to the upper open part of the body (J) and the left and right side walls of the duct main body (1) are installed between the front edge of the lower open part (12) and rearward. A first straightening vane (2) provided with an inclined plate part (21) rising toward the front and an arcuate part (22) bent from the upper side to the front at the rear end thereof; and the arcuate part (22) ) A second flow rectifying plate (3) inclined from the rear end portion (31) facing the front edge portion from below to the front lower direction and installed between the left and right side walls in the duct main body (1), An inclined portion (41) located above the second straightening vane (3) and substantially parallel to the second straightening vane (3) and an arcuate portion (42) substantially concentric with the arcuate portion (22) continuous to the rear end thereof. When provided, the arcuate portion (42) is not connected to the rear of the lower opening (12). And a third rectifying plate (4) having a hanging plate part (43) extending to the upper part and installed between left and right side walls in the duct main body (1), the third rectifying plate (4) being The first rectifying plate (2) and the second rectifying plate (3) are bent from the lower open part (12) side to the rear of the first rectifying plate (2) and then the front edge of the second rectifying plate (3). A lateral exhaust passage (10) that bends upward and substantially matches the left-right width of the duct main body (1) is constituted, and the first straightening vanes (2) are attached to the side plates (23) ( 23) is screwed to the side wall of the duct main body (1) and fixed at a predetermined position in a predetermined posture, and the third straightening plate (4) is provided with positioning plates (44) (44) provided at both ends of the inclined part (41). ) And the hanging plate (43) determine the posture of insertion into the duct main body (1), and the second straightening vane (3) extends upward from both left and right ends of the duct and the posture with respect to the inclined portion (41). The mounting side plates (32) (32) for setting the In screwing piece penetrating the both end portions of the inclined portions (41) (33) is to be screwed to the left and right side walls of the positioning plate (44) the duct main (1) with "it is.

[0007]

[Action]

 The above technical means act as follows. The third straightening vane (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 straightening vane (4) is determined by the positioning plates (44) and the hanging plate (43) at both ends of the inclined portion (41) in the duct main body (1).

Then, the screw stop pieces (33) of the second straightening plate (3) are inserted so as to contact the inside of the positioning plate (44) so as to project upward from both ends of the inclined portion (41). With the mounting side plate (32) in contact with the inclined portion (41), the screwing piece (33) and the positioning plate (44) are screwed to the side wall of the duct main body (1). As a result, the mounting side plate (32) causes the inclined portion (41) and the second rectifying plate (3) to have a predetermined posture and a passage having a constant width is formed between them.

After that, the second rectifying plate (2) is mainly connected to the duct so that the front edge of the arcuate portion (22) is contacted from above the rear end (31) of the second rectifying plate (3). 1) Insert the mounting side plate (23) (23) into the side wall of the duct main body (1) and screw the mounting side plates (23) (23) to the arcuate part (22) and arcuate part (42). ) Communicate with the space between. As described above, the inclined portion (41) and the second rectifying plate (3) are directed rearward from the downward opening portion (12) and pass through the passage formed between the arcuate portion (22) and the arcuate portion (42). The exhaust passage (10) reaching the passage formed between (1) and () is configured inside the duct main body (1). Then, when this is attached to the can body (J), the combustion exhaust gas of the can body (J) passes through the exhaust passage (10) and the front edge of the inclined part (41) and the second straightening plate (3). It is discharged from the discharge port between the front edges of the.

[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 screwed to the side wall of the duct main body (1). 1) Since the exhaust passage (10) can be formed inside, the exhaust duct (D) can be easily assembled.

[0011]

【Example】

 Next, the embodiment of the present invention described above will be described in detail with reference to FIGS. The exhaust duct (D) of this embodiment has an external appearance as shown in FIG. Although details of each part are not shown in the figure, the duct main body (1) is a box body in which a notch opening part is formed in the lower part of the front wall so that the entire lower part is open and connected to it. By closing the lower end of the cutout opening with the front edge of the first straightening vane (2), the front wall of the duct main body (1) has a rectangular shape that covers almost the entire width. Of the duct main body (1) forms a rectangular downward opening (12).

The flange piece (13) extends from the left and right sides and the rear side of the lower opening (12), and the hanging piece (14) hangs from the entire peripheral edge thereof. Further, as shown in FIG. 3, the horizontal piece (24) formed on the front edge of the first flow rectifying plate (2) and the flange piece (13) are attached so as to be continuous with each other. The hanging piece (25) provided at the front edge of (24) is continuous with the hanging piece portion (14). Therefore, a rectangular flange portion consisting of the flange piece portion (13) and the horizontal piece (24) is formed around the lower opening portion (12), and the entire peripheral edge of the flange portion is formed as the hanging piece portion (14). It will be surrounded by a rectangular skirt consisting of a hanging piece (25).

The inner peripheral shape and size of the skirt portion match the outer peripheral shape and size of the flange portion (F) at the upper end of the can body (J), and the lower end portion of the duct main body (1) is When fitted over the upper end of the can body (J), the upper open part and the lower open part (12) of the can body (J) are substantially aligned. As shown in FIGS. 4 and 5, the first straightening vane (2) has an arc shape bent upward from the rear end of the inclined plate portion (21) which is inclined so as to slightly rise rearward with respect to the horizontal posture. The parts (22) are continuously provided, and the mounting side plates (23) hang down from the left and right ends of the inclined plate part (21). A screw hole (27) is formed in the mounting side plate (23), and a projection piece (26) of a constant width is horizontally provided on the lower side of the mounting side plate (23) so as to project outward in the horizontal direction. .

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

The length of the hanging piece (25) is equal to the distance between the hanging piece parts (14) and (14) hanging at both ends of the duct main body (1), and the upper surface of the protruding piece (26) is When the lower end of the flange piece (13) of the duct main body (1) is brought into contact with each other and both ends of the hanging piece (25) are brought into contact with the front edges of the hanging pieces (14) and (14), the first rectification is performed. The mounting posture and position of the plate (2) are determined, and in this state, when the mounting screw that penetrates the side wall of the duct main body (1) is screwed into the screw hole (27), the first rectifying plate (2) forms the duct main body ( 1) It is fixed in a predetermined posture.

Needless to say, the space between the mounting side plates 23, 23 is adapted to the space between the side walls of the duct main body 1. Next, as shown in FIG. 6, the third straightening vane (4) is provided with an arcuate portion (42) that bends downward at the rear end of the inclined portion (41), and the lower end of the arcuate portion (42) is rearward. The hanging plate portion (43) is continuously provided via the bending boundary bending portion (42a). The lower end of this is provided with a contact plate (45) protruding rearward. Further, a guide piece (46) that bends upward is continuously provided at the front edge of the inclined portion (41), and this guide is provided when the third straightening vane (4) is housed in the duct main body (1). The tip of the piece (46) projects forward from the front opening (11).

Positioning plates (44) (44) having upper and vertical sides matching the shape of the front upper part of the side wall of the duct main body (1) project upward from both ends of the inclined part (41). It is provided as follows. When the third straightening vane (4) is housed in the duct main body (1) so that the positioning plates (44) (44) are aligned with the front upper corners of the side walls of the duct main body (1). The contact plate (45) is in contact with the lower surface of the flange piece (13) formed at the rear edge of the duct main body (1).

Long holes (47) are formed along the positioning plate (44) at both ends of the inclined portion (41) near the base end of the positioning plate (44). The width of the screw plate (33) of the 2 baffle plate (3) is made to approximately match. In addition, each positioning plate (44) is formed with a through hole (48), and a protrusion (49) protruding inward is formed in the vicinity thereof. As described above, in the third rectifying plate (4), the positioning plates (44) and (44) are in contact with the upper corners of the side wall of the duct main body (1) and the contact plate (45) is the duct main body (1). When the flange piece (13) is attached to the rear edge of the rear end of the third contact plate, the third straightening vane (4) is properly positioned with respect to the duct main body (1).

As shown in FIG. 7, the second straightening vane (3) has a rear end portion in a horizontal direction from a flat plate-shaped main body which is parallel to the inclined portion (41) of the third straightening vane (4). (31) are provided in a row, and a guide portion (34) that bends upward is formed at the front edge of the main body so as to extend, and the guide piece (46) and the guide portion (46) are provided at both ends. A mounting side plate (32), which closes the side portion between (34) and is interposed between the inclined portion (41) and the second flow straightening plate (3), is continuously provided. The mounting side plate (32) In, a front upper end and a rear upper end of a portion interposed between the main body portion of the second straightening plate (3) and the inclined portion (41) are in contact with the lower surface of the inclined portion (41). As a result, the degree of parallelism between the main body portion of the second flow rectifying plate (3) and the inclined portion (41) is secured.

A screwing piece (33) projects upward from the rear part of the mounting side plate (32), and this screwing piece (33) has a screw hole (35) aligned with the through hole (48) and a protrusion. A through hole (36) is formed so as to coincide with (49). Then, the screwing pieces (33) (33) of the second rectifying plate (3) are projected upward from the long holes (47) (47) at both ends of the inclined part (41) to attach the side plates (32) (32). ) Is made to contact the lower surface of the inclined part (41), and the projection (49) of the positioning plate (44) is fitted into the through hole (36). The second straightening plate (3) is positioned so that the screw hole (35) and the through hole (48) are aligned with each other.

In the exhaust duct having the above-described configuration, the second rectifying plate (3) and the third rectifying plate (4) combined with the above-described aspect are housed in the duct main body (1) to position the positioning plates (44) (44). ) And the hanging plate part (43), the mounting hole and the mounting hole provided at the predetermined position on the side wall of the duct main body (1) with the mounting position and the mounting attitude of the third rectifying plate (4) determined as described above. From the through hole (48) to the screw hole (35) of the screw fastening piece (33), the second straightening plate (3) and the third straightening plate (4) are placed in predetermined positions and in predetermined postures. Fixed.

On the other hand, with the arcuate portion (22) positioned above the rear end portion (31) and the first straightening vane (2) positioned and set in a predetermined posture as described above. When the mounting side plates (23) (23) are screwed to the side wall of the duct body (1) using the screw holes (27), the first straightening vane (2) is fixed in the duct main body (1) in a predetermined state. It Then, in this state, a rectangular annular flange portion and a skirt portion are formed on the peripheral edge of the lower opening portion (12).

As shown in FIG. 3, the exhaust duct (D) configured as described above is attached and fixed to the flange portion of the upper end opening portion of the can body (J) through the packing (5), and the can body (J) is fixed. Exhaust gas 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) through the exhaust passage (10) in the exhaust duct (D). ) Will be discharged. In this embodiment, since the exhaust duct (D) is formed by a plurality of metal plate-shaped members, the exhaust passage (10) may have a wall formed with, for example, both ends of the arc-shaped portion (42). There are slight gaps at both ends of the arcuate part (22), and also at the joints between the horizontal piece (24) and the flange piece (13). If the caulking material is applied and blocked in this state, no exhaust gas leaks from the exhaust passageway (10).

In this embodiment, the width from the front part of the inclined part (41) of the third straightening vane (4) to the guide piece (46) and the horizontal width of the front part of (3) are directed toward the tip. The mounting side plates (32, 32) are also bent inward at the tip side to gradually narrow the exhaust passage (10), but these parts are linear. May be The second rectifying plate is disposed below the guide portion (34) (3) and the front opening which communicates with the space between the first rectifier plate (2) there are (P _3), first rectifying plate ( A large number of burring holes (20) (20) that penetrate vertically are formed in the front part of the inclined plate part (21) of (2). Although a small amount of exhaust gas is discharged through the burring holes (20) (20), the exhaust gas is discharged from the front opening portion (P ₃ ), whereby the inconvenience of exhaust sound resonance can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a 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] Cross-sectional view of essential parts in a state of being attached to a can body (J)

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

FIG. 5 is a side view of the second straightening vane (3).

FIG. 6 is an explanatory view of a third straightening vane (4).

FIG. 7 is an explanatory view of a first straightening vane (2).

[Explanation of symbols]

 (J) ・ ・ ・ Can body (11) ・ ・ ・ Front open part (12) ・ ・ ・ Lower open part (1) ・ ・ ・ Main duct (21) ・ ・ ・ Inclined plate part (22) ・ ・ ・ Circle Arc part (2) ・ ・ ・ First rectifying plate (31) ・ ・ ・ Rear end part (3) ・ ・ ・ Second rectifying plate (41) ・ ・ ・ Sloping part (42) ・ ・ ・ Arc part (43 ) ... hanging plate part (4) ... third rectifying plate (10) ... exhaust passage (23) ... side plate (44) ... positioning plate (45) ... positioning piece (32) ) ・ ・ ・ Mounting side plate (33) ・ ・ ・ Screw stopper

Claims (1)

[Scope of utility model registration request] 1. A water heater having an exhaust passage which is capped at an open upper end portion of a can body (J) for a heat exchanger and temporarily bends upward exhaust gas from the can body (J) backward and then forward. In the exhaust duct of, a rectangular parallelepiped box body having a front opening portion (11) and a lower opening portion (12) and fixing the peripheral edge of the lower opening portion (12) to the upper end opening portion of the can body (J). The duct main body (1) thus constructed and the inclined plate portion (21) that is installed between the left and right side walls inside the duct main body (1) and that rises rearward from the front edge of the lower opening (12). A first straightening plate (2) having an arcuate portion (22) bent forward at its rear end;
The second part which is inclined forward and downward from the rear end part (31) facing the front edge part of (22) and is erected between the left and right side walls in the duct main body (1).
A straightening vane (3), an inclined portion (41) located above the second straightening vane (3) and substantially parallel to the second straightening vane (3), and a rear end of which is substantially concentric with the arcuate portion (22). And a third straightening plate (4) having a hanging plate portion (43) extending from the circular arc portion (42) to the rear edge of the downward opening portion (12). The third rectifying plate (4) is installed between the left and right side walls of the duct main body (1) and is installed between the first rectifying plate (2) and the second rectifying plate (3). 2) From the lower open part (12) side below the second straightening vane
An exhaust passage (10) having a width that is bent above the front edge of (3) and matches the width of the duct main body (1) is formed, and the first straightening vane (2)
The side plates (23) (23) provided at the left and right ends of this are mainly ducts.
The third rectifying plate (4) is fixed to a predetermined posture and a predetermined position by being screwed to the side wall of (1), and the third rectifying plate (4) includes positioning plates (44) (44) and a hanging plate provided at both ends of the inclined part (41). A positioning piece (4) provided at the lower end of the part (43) and contacting the rear end of the lower opening part (12) from below.
The insertion attitude into the duct main body (1) is determined by 5),
The second straightening vane (3) is provided with mounting side plates (32) (32) extending upward from the left and right ends thereof and for setting a posture with respect to the inclined portion (41) in a predetermined manner. Division (41)
An exhaust duct for a water heater in which a screwing piece (33) penetrating both ends of the water heater is fixed to the left and right side walls of the duct main body (1) together with the positioning plate (44).