JP2018132259A - Exhaust structure for water heater and water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust structure for a water heater capable of appropriately reducing exhaust noise while suppressing increase in manufacturing cost.SOLUTION: A straightening guide G for guiding exhaust gas in a case 3 to an exhaust port 32 includes: a mounting plate portion 50 mounted to abut on an inner surface of a front wall 30 of the case 3 and having an opening 52a for passage of exhaust gas; and a cylindrical guide portion 51 that is formed to have a cylindrical shape extending forwards from a peripheral edge of the opening 52a of the mounting plate portion 50 and in which an exhaust gas guide flow passage 52 for guiding exhaust gas caused to flow into the opening 52a to the exhaust port 32 is formed. Fitting contact portions 53a, 53b coming into contact with a burring portion 34 protruded in the peripheral edge of the exhaust port 32 in a fitted manner are provided at portions near a tip of the cylindrical guide portion 51.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an exhaust structure of a hot water supply apparatus capable of reducing exhaust noise, and a hot water supply apparatus having this structure.

As an example of the exhaust structure of the hot water supply apparatus, there is one described in Patent Document 1.
In the exhaust structure described in the same document, an exhaust top portion protrudes from the front wall portion of the case in which the heat transfer tube of the heat exchanger is accommodated, and the heat exchange gas after heat recovery by the heat transfer tube is finished. (Exhaust gas) is configured to be exhausted to the outside from an exhaust port formed at the tip of the exhaust top portion. When exhaust gas becomes a violent turbulent state in the vicinity of the exhaust port, exhaust noise increases. For this reason, in patent document 1, in order to prevent such a thing, the rectification | straightening guide is attached in the case.

However, in the prior art, as a means for attaching the rectifying guide, a structure in which the rectifying guide is attached in a mere bridge shape between the exhaust port formation portion of the exhaust top portion and the front wall portion of the case is adopted. It ’s just that. For this reason, it has the structure which is easy to produce a clearance gap in the connection location of a case or an exhaust top part, and a rectification | straightening guide. As a result, there is a possibility that a large wind noise may be generated as exhaust noise due to exhaust gas passing through such a gap. In recent years, downsizing of heat exchangers has been demanded, and in response to this, there are many cases where the exhaust port is reduced in size. In such a case, the exhaust gas is reduced due to an increase in pressure loss. It becomes easier to pass through such a gap, and the wind noise is further increased.
As means for solving such a problem, means using seal packing or a sound absorbing material is appropriately employed. However, the use of such means causes a disadvantage that the manufacturing cost increases.

Japanese Patent No. 4272214

  The present invention has been conceived under the circumstances as described above, and an exhaust structure of a hot water supply apparatus capable of appropriately reducing exhaust noise while suppressing an increase in manufacturing cost. An object of the present invention is to provide a hot water supply apparatus having this structure.

  In order to solve the above problems, the present invention takes the following technical means.

The exhaust structure of the hot water supply apparatus provided by the first aspect of the present invention includes a case in which heat exchange gas, which is exhaust gas, is supplied to the inside, and a front wall portion of the case that protrudes to the front side. And an exhaust top portion having an exhaust port formed at the tip thereof, and a rectifying guide for guiding the exhaust gas in the case to the exhaust port. A burring portion projecting toward the rear side of the case is formed at a peripheral edge portion of the exhaust port, and the rectifying guide is attached in contact with an inner surface of the front wall portion of the case; and A mounting plate provided with an opening for exhaust gas passage, and of the mounting plate, the exhaust plate is formed in a cylindrical shape extending forward from a peripheral edge of the opening and exhausted into the opening. Exhaust gas guide channel to lead to the mouth A cylindrical guide portion formed therein, has a,
A fitting contact portion that is fitted and brought into contact with the burring portion is provided at a portion near the tip of the cylindrical guide portion.
Here, the front wall portion of the case is an upright wall portion located at the front portion of the case itself, and does not necessarily coincide with the front portion of the water heater. For example, in a rear exhaust type hot water supply apparatus, the front wall portion of the case is arranged to face the back of the hot water supply apparatus. In the present invention, the front wall portion of the case can be interpreted as an upright wall portion provided with an exhaust top portion having an exhaust port in the case.

According to such a configuration, the following effects can be obtained.
That is, when the exhaust gas in the case reaches the exhaust gas passage opening provided on the mounting plate portion of the rectifying guide, the exhaust gas then passes through the exhaust gas guide flow path in the cylindrical guide portion and the exhaust port of the exhaust top portion To the outside of the case. Here, the fitting contact portion provided near the tip of the cylindrical guide portion and the burring portion protruding from the peripheral edge of the exhaust port of the exhaust top portion are in fitting contact. It is possible to improve the hermetic sealing performance of the portion, and to make it difficult to generate a gap that causes wind noise between the portion near the tip of the cylindrical guide portion and the burring portion of the exhaust top portion. In addition, since the mounting plate portion of the rectifying guide is mounted in contact with the inner surface of the front wall portion of the case, a gap that causes wind noise at the mounting portion between the mounting plate portion and the front wall portion of the case. Can be made difficult to occur.
For this reason, according to the present invention, exhaust noise can be appropriately reduced as compared with the prior art. As a measure for reducing exhaust noise, it is possible to eliminate the need to use a seal packing and a sound absorbing material, and the manufacturing cost can be reduced.

  In the present invention, it is preferable that a flange portion that is in contact with the inner surface of the peripheral wall of the exhaust port among the distal end portions of the exhaust top portion is connected to the cylindrical guide portion.

  According to such a configuration, it is possible to further improve the hermetic sealing performance between the peripheral wall of the exhaust port of the exhaust top portion and the cylindrical guide portion of the rectifying guide, and thus a phenomenon in which wind noise is generated. It is more preferable in preventing the above.

  In the present invention, preferably, the burring portion is provided in a series over the entire circumference of the inner peripheral edge of the exhaust port, so that an upper burring portion that is positioned above and below the exhaust port and extends in the lateral width direction, and A lower burring portion, and a pair of left and right end burring portions located on both the left and right sides of the exhaust port so as to be connected to the end portions, and the fitting guide portion includes the fitting contact portion. A pair of upper and lower fitting contact portions that are fitted and contacted with the upper burring portion and the lower burring portion, and a pair of left and right contact piece portions that contact the tip portions of the pair of end burring portions. Is provided.

According to such a configuration, the upper burring portion and the lower burring portion of the peripheral portion of the exhaust port are appropriately formed by fitting and contacting the pair of upper and lower fitting contact portions of the cylindrical guide portion. A seal is achieved. Further, with respect to the locations where the pair of left and right end burring portions are formed, an appropriate seal is achieved by the pair of left and right abutment pieces of the cylindrical guide portion coming into contact with these tip portions. Therefore, it is possible to prevent a gap that causes wind noise from occurring over the entire circumference of the burring portion.
In the present invention, unlike the above configuration, it is possible to adopt a structure in which the tip end portion (fitting contact portion) of the cylindrical guide portion is directly fitted to the entire burring portion. If there is distortion in the burring part or the cylindrical guide part, they cannot be properly fitted and contacted with each other, and a large gap may be generated. On the other hand, according to the said structure, it is possible to eliminate such a concern appropriately.

In the present invention, preferably, the rectifying guide is configured by combining first and second rectifying members in a form in which each of the mounting plate portion and the cylindrical guide portion is divided.

  According to such a structure, compared with the case where a straightening guide is formed with a single member, manufacture of a straightening guide becomes easy and it can aim at reduction of manufacturing cost. Further, when the first and second rectifying members are assembled at predetermined positions of the case, the assembly positions of the first and second rectifying guides can be individually adjusted. It is easier to set so as not to cause an unreasonable gap therebetween.

  In the present invention, preferably, the rectifying guide is configured by combining the first and second rectifying members in a form in which each of the mounting plate portion and the cylindrical guide portion is divided. The rectifying member includes the pair of abutting pieces, and the second rectifying member is a pair of pressing pieces for pressing the pair of abutting pieces against the distal ends of the pair of end burring portions. Department.

  According to such a configuration, it is possible to prevent a gap from being generated between the tip portion of the end burring portion and the abutting piece portion, and to prevent a gap that causes wind noise in this portion. More appropriate.

  The hot water supply apparatus provided by the second aspect of the present invention is characterized by including the exhaust structure of the hot water supply apparatus provided by the first aspect of the present invention.

  According to such a structure, the same effect as described about the exhaust structure of the hot water supply apparatus provided by the first aspect of the present invention can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a schematic sectional drawing which shows an example of the hot water supply apparatus which concerns on this invention. (A) is an external appearance perspective view of the heat exchanger which comprises the hot-water supply apparatus shown in FIG. 1, (b) is a schematic front view of (a). FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is an exploded cross-sectional view of a main part of the exhaust structure shown in FIG. 3. FIG. 3 is a plan sectional view of the heat exchanger shown in FIG. 2. It is a partially broken principal part disassembled perspective view which shows the front wall part and rectification | straightening guide of the heat exchanger shown in FIG. FIG. 7 is an exploded perspective view of the rectifying guide shown in FIG. 6.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The hot water supply device WH shown in FIG. 1 includes a fan 21, a burner 20, a primary heat exchanger 1, a secondary heat exchanger HE, and an exhaust structure C.

  The hot water heater WH, except for the exhaust structure C, has the same basic configuration as that of a conventionally known hot water heater, and this point will be briefly described. That is, the burner 20 burns fuel such as fuel gas using the combustion air supplied upward from the fan 21, and sensible heat is recovered from the combustion gas by the primary heat exchanger 1. The primary heat exchanger 1 has a configuration in which a heat transfer tube 12 inserted and connected to a plurality of fins 11 is arranged in a can body 10.

  The secondary heat exchanger HE is for recovering latent heat from the combustion gas after passing through the primary heat exchanger 1, and is a case in which an air supply port 31 and an exhaust port 32 are provided at the rear and the front. 3 is a configuration in which a plurality of heat transfer tubes 4 are arranged. Each heat transfer tube 4 has, for example, a meandering shape in plan view as shown in FIG. 5, and headers 40 and 41 for water entry and hot water are attached to both ends thereof (see also FIG. 2). The water supplied to the inlet 40a of the header 40 for incoming water passes through the plurality of heat transfer tubes 4 and is heated before reaching the header 41 for hot water, and then the primary heat exchanger from the outlet 41a. One heat transfer tube 12 is fed and heated. The hot water heated in this way is sent to a desired hot water supply destination.

As shown in FIG. 3, the exhaust structure C includes a case 3 of the secondary heat exchanger HE, an exhaust top portion 33 provided on the front wall portion 30 of the case 3, and a rectifying guide G. .
The case 3 is made of, for example, stainless steel, and the overall shape is a substantially rectangular parallelepiped shape. The combustion gas that has flowed into the case 3 from the air supply port 31 is exhausted after passing through the plurality of heat transfer tubes 4 and is exhausted to the outside through the exhaust port 32.

  The exhaust top portion 33 is formed integrally with the front wall portion 30 by performing drawing processing or other press processing on the standing front wall portion 30 of the case 3. The exhaust top portion 33 includes a convex peripheral wall portion 33a protruding forward from the front wall portion 30, a front end wall portion 33b connected to a front end portion of the convex peripheral wall portion 33a, and an exhaust gas formed on the front end wall portion 33b. An opening 32 and a burring portion 34 connected to the inner peripheral edge of the exhaust port 32 are provided, and the inside of the exhaust top portion 33 is a space region.

  As shown in FIG. 2, the exhaust top portion 33 has a substantially long rectangular shape or a substantially oval shape extending in the lateral width direction of the case 3 in a front view, and the exhaust port 32 has a similar shape. The burring part 34 protrudes to the rear side of the case 3 and is formed in a state of being continuously connected over the entire inner periphery of the exhaust port 32. For this reason, the burring portion 34 is connected to the upper burring portion 34a and the lower burring portion 34b that are respectively provided above and below the exhaust port 32 and extend in the lateral width direction, and to the ends of the upper burring portion 34a and the lower burring portion 34b. And a pair of end burring portions 34 c provided on the left and right sides of the exhaust port 32.

  6 and 7, the rectifying guide G is manufactured by pressing a metal plate such as a stainless steel plate, for example. As will be described later, the first and second rectifying members are separate from each other. It is configured by combining 5A and 5B. However, for ease of understanding, the configuration of the straightening guide G completed by combining the first and second straightening members 5A and 5B will be described first.

  The rectifying guide G includes a flat mounting plate portion 50 (50a, 50b) standing up and down in the vertical direction, and a substantially horizontal cylindrical guide portion 51 connected to the mounting plate portion 50. The mounting plate portion 50 is attached in a state of being in face contact with a region around the exhaust top portion 33 (the inner region 39 of the exhaust top portion 33) on the inner surface of the front wall portion 30 of the case 3. This attachment is performed using means such as spot welding. Preferably, as means for positioning the mounting plate portion 50 at that time, the front wall portion 30 and the mounting plate portion 50 are appropriately provided with positioning convex portions 30a and hole portions 60 that can be fitted to each other. . The attachment plate portion 50 is basically attached so as to close the rear surface side of the inner region 39 so that the exhaust gas does not enter the inner region 39 of the exhaust top portion 33. However, the mounting plate 50 is provided with an opening 52a for passing exhaust gas, and the exhaust gas that has traveled forward in the case 3 flows into the opening 52a.

  The cylindrical guide portion 51 is a cylindrical shape that extends forward from the peripheral edge portion of the opening 52 a in the mounting plate portion 50, and in this embodiment to correspond to the front view shape of the exhaust port 32 and the burring portion 34. The case 3 has a cylindrical shape with a flat, substantially rectangular cross-section that has a long dimension in the horizontal width direction and a short width in the vertical height direction. The inside of the cylindrical guide 51 is an exhaust gas guide channel 52 for guiding exhaust gas flowing into the opening 52 a to the exhaust port 32, and the opening 52 a corresponds to an opening on one end side of the exhaust gas guide channel 52. .

  3 and 4, a pair of upper and lower fitting contact portions 53a, as a means for connecting this portion to the exhaust top portion 33 in a state of high hermetic sealing performance, is provided at the tip end portion of the cylindrical guide portion 51. 53b, a pair of upper and lower flange portions 54a and 54b, and a pair of left and right contact piece portions 55 (see FIGS. 6 and 7).

  The pair of upper and lower fitting contact portions 53a and 53b are portions located on both upper and lower sides of the upper burring portion 34a and the lower burring portion 34b and are in contact with these portions. The upper wall portion of the cylindrical guide portion 51 51a and the lower wall portion 51b are provided near the tip. As shown in FIG. 4, the upper fitting contact portion 53a is formed in a stepped portion shape forming a concave portion 56a into which the upper burring portion 34a enters, and in the state shown in FIG. The downward surfaces of the burring portion 34a and the upper wall portion 51a are configured to be substantially flush with each other. Similarly, the lower fitting contact portion 53b is formed in a stepped shape that forms a concave portion 56b into which the lower burring portion 34b enters, and the lower burring portion 34b and the lower wall portion 51b Each upward surface is configured to be substantially flush.

  The pair of upper and lower flange portions 54a and 54b are upright or downward standing connected to the tips of the fitting contact portions 53a and 53b. These flange portions 54 a and 54 b are in contact with the inner surface of the tip wall portion 33 b of the exhaust top portion 33 (the inner surface of the peripheral wall of the exhaust port 32) in a surface contact state.

  6 and 7, the abutting piece 55 is a portion for abutting against the tip of the end burring portion 34c, and is continuously provided at the tip of the left and right side walls 51c of the cylindrical guide portion 51. In addition, it is a small piece with the front surface portion being an upright plane. In the present embodiment, a structure in which the entire distal end portion of the cylindrical guide portion 51 is externally fitted to the burring portion 34 is not employed, and the end burring portion 34c of the burring portion 34 is in contact with the distal end portion. A seal structure that abuts the piece 55 is employed. The rectifying guide G includes a pair of pressing piece portions 57 capable of pressing the contact piece portion 55 toward the end burring portion 34c, which will be described later.

  The rectifying guide G is configured by combining first and second rectifying members 5A and 5B having a form as shown in FIG. The first and second rectifying members 5A and 5B have a form in which the rectifying guide G is divided into two parts. However, these are not symmetrical in the vertical direction, and both the side wall portions 51c and the contact piece portions 55 are provided on the upper first rectifying member 5A and provided on the lower second rectifying member 5B. Not. On the other hand, the second rectifying member 5B is provided with a pair of pressing pieces 57 for pressing the contact piece 55 forward and pressing it against the tip of the end burring portion 34c. An auxiliary piece portion 55a having the same form as the contact piece portion 55 is formed at the rear end portion of each side wall portion 51c, and the pressing piece portion 57 overlaps the rear surface side of the auxiliary piece portion 55a, and this The auxiliary piece 55a can be pressed forward.

The configuration will be described in more detail. As shown in FIG. 4, the case 3 is first attached with the first rectifying member 5A and then the second rectifying member 5B. At that time, the pressing piece portion 57 of the second rectifying member 5B is disposed so as to overlap the rear surface side of the auxiliary piece portion 55a, and the auxiliary piece portion 55a, the side wall portion 51c, and the contact piece portion 55 are pressed forward. The As a result, the contact piece 55 is pressed against the tip of the end burring portion 34c (see also the enlarged view of the main part in FIG. 5).

  Next, the operation of the hot water supply device WH provided with the exhaust structure C described above will be described.

  The combustion gas (exhaust gas) after heat recovery that has flowed into the case 3 of the secondary heat exchanger HE and has advanced further forward than the region where the plurality of heat transfer tubes 4 are provided is the exhaust gas of the rectifying guide G. It passes through the guide channel 52 and is led to the exhaust port 32 to be exhausted to the outside. Here, since the mounting plate portion 50 (50a, 50b) of the rectifying guide G is joined to the inner surface of the front wall portion 30 of the case 3 in a face-to-face contact state, the inner surface of the front wall portion 30 and the mounting plate portion 50 are connected. It is possible to prevent an unreasonable gap that causes exhaust gas to advance in the inner region 39 of the exhaust top portion 33 between the two.

  On the other hand, in the portion near the tip of the cylindrical guide portion 51 of the rectifying guide G and the peripheral portion of the exhaust port 32 of the exhaust top portion 33, the fitting contact portions 53a and 53b of the cylindrical guide portion 51 are the upper burring portion 34a and The lower burring portion 34b is in fitting contact. Further, the pair of left and right contact piece portions 55 are in contact with the tip portions of the pair of end burring portions 34c. For this reason, it is also possible to set so that an unreasonable gap does not occur over the entire circumference of the connection portion between the burring portion 34 and the tip end portion of the cylindrical guide portion 51.

In particular, the mating contact between the mating contact portions 53a and 53b and the upper burring portion 34a and the lower burring portion 34b can be brought into a surface contact state between flat surfaces, and therefore the airtight sealability should be excellent. Is possible. Further, as described above, since the abutting piece portion 55 can be pressed against the tip end portion of the end burring portion 34c by the pressing piece portion 57, the airtight sealability of these portions is also excellent. It is possible. Further, the fitting contact portions 53a and 53b are fitted and brought into contact with the upper burring portion 34a and the lower burring portion 34b, while the fitting contact method is adopted for the pair of end burring portions 34c. In addition, since a method (butting method) in which a pair of contact piece portions 55 are brought into contact with the front end portion is adopted, even if distortion occurs in the burring portion 34 or the like, it is appropriate in various places of the burring portion 34. It is easy to seal. For this reason, it is possible to prevent the exhaust gas from flowing in and out between the exhaust gas guide channel 52 and the inner region 39 of the exhaust top portion 33.
Further, in the present embodiment, the flange portions 54a and 54b of the rectifying guide G are in contact with the inner surface of the tip wall portion 33b of the exhaust top portion 33, and this portion can also be provided with an airtight seal.

  As described above, in the present embodiment, the exhaust gas can be smoothly guided to the exhaust port 32 using the rectifying guide G. However, the exhaust gas passes through the region other than the exhaust gas guide channel 52 and the exhaust port. It is possible to prevent a gap from reaching 32. Therefore, it is possible to appropriately prevent the generation of wind noise due to the presence of the gap and reduce the exhaust noise.

Since the rectifying guide G is configured by combining the first and second rectifying members 5A and 5B, for example, the rectifying guide G is formed as a single member, and the cylindrical guide portion 51 is integrally formed with the mounting plate portion 50. Compared with the case where it does, manufacture of the rectification | straightening guide G becomes easy. Therefore, it is preferable for reducing the manufacturing cost. Further, when assembling the first and second rectifying members 5A and 5B at predetermined positions of the case 3, the first and second rectifying members 5A and 5B are individually adjusted so as to be optimal positions, It is easier to set so as not to generate a gap that causes wind noise. Further, as described above, a configuration in which the abutting piece portion 55 is pressed against the end burring portion 34c by the pressing piece portion 57 is adopted. However, such a configuration also uses the first and second rectifying guides G. This is appropriately realized by dividing the flow regulating members 5A and 5B. When the rectifying guide G is divided into the first and second rectifying members 5A and 5B, the second rectifying member 5B presses a portion other than the contact piece 55 in the first rectifying member 5A. It is also possible to configure so as to.

  The present invention is not limited to the contents of the above-described embodiment. The exhaust structure of the hot water supply apparatus according to the present invention and the specific configuration of each part of the hot water supply apparatus can be variously modified within the intended scope of the present invention.

  The exhaust top portion does not necessarily have to be formed integrally with the front wall portion of the case, and a structure formed by using a member different from the case is joined to the outer surface of the front wall portion of the case. You can also.

  In the above-described embodiment, the rectifying guide G is configured by combining the first and second rectifying members 5A and 5B. However, the present invention is not limited to this, and the rectifying guide G is configured by a single member. Or three or more rectifying members can be used. When the rectifying guide is composed of a plurality of rectifying members, the plurality of rectifying members are not limited to the configuration in which the rectifying guide is divided vertically, but may be configured to be divided, for example, in the lateral width direction.

  In the present invention, it is a requirement to provide a fitting contact portion that fits and contacts the burring portion of the exhaust top portion in the cylindrical guide portion of the rectifying guide, but as will be understood from the above-described embodiment, The fitting contact portion may not be in fitting contact with the entire periphery of the burring portion. The exhaust port may have a shape other than a substantially rectangular shape or a substantially oval shape when viewed from the front.

The case referred to in the present invention is not limited to the case of a secondary heat exchanger for recovering latent heat. As a hot water supply device, there is a sensible heat recovery type that does not include a secondary heat exchanger and has only a primary heat exchanger as a heat exchanger. The exhaust structure according to the present invention can also be applied as an exhaust structure in a heat exchanger case or an exhaust case (collecting cylinder) connected to the primary heat exchanger.
The hot water supply apparatus according to the present invention only needs to have the exhaust structure intended by the present invention, and the type of burner, the specific configuration of the heat exchanger, and the like are not limited. As the hot water heating medium in the hot water supply apparatus, for example, high temperature gas discharged from the power generation unit of the cogeneration system can be used, and the exhaust gas referred to in the present invention is not limited to combustion gas.

WH Hot water supply system C Exhaust structure (exhaust structure of hot water system)
G Rectification guide 3 Case 30 Front wall (case)
32 Exhaust port 33 Exhaust top portion 34 Burring portion 34a Upper burring portion 34b Lower burring portion 34c End burring portions 5A, 5B First and second rectifying members 50 Mounting plate portion 51 Cylindrical guide portion 52 Exhaust gas guide channel 52a Opening Parts 53a, 53b fitting contact parts 54a, 54b flange part 55 abutting piece part 57 pressing piece part

Claims (6)

A case where a gas to be exhaust gas is supplied to the inside;
An exhaust top portion provided on the upright front wall portion of the case so as to protrude to the front side, and having an exhaust port formed at the tip portion;
A rectifying guide for guiding the exhaust gas in the case to the exhaust port;
An exhaust structure of a hot water supply device comprising:
A burring portion that protrudes toward the rear side of the case is formed at the peripheral edge of the exhaust port,
The rectifying guide is attached in contact with the inner surface of the front wall portion of the case, and an attachment plate portion provided with an exhaust gas passage opening, and the periphery of the opening portion of the attachment plate portion A cylindrical guide part formed in a cylindrical shape extending forward from the part and having an exhaust gas guide channel formed therein for guiding the exhaust gas flowing into the opening to the exhaust port,
An exhaust structure of a hot water supply apparatus, wherein a fitting contact portion that is fitted and brought into contact with the burring portion is provided at a portion near the tip of the cylindrical guide portion. An exhaust structure of a hot water supply device according to claim 1,
An exhaust structure of a hot water supply apparatus, wherein a flange portion that is in contact with an inner surface of a peripheral wall of the exhaust port is connected to the tubular guide portion, of a distal end portion of the exhaust top portion. An exhaust structure of a hot water supply device according to claim 1 or 2,
The burring portion is provided in a series over the entire circumference of the inner peripheral edge of the exhaust port, so that an upper burring portion and a lower burring portion that are respectively positioned above and below the exhaust port and extend in the lateral width direction, and these A pair of left and right end burring portions located on the left and right sides of the exhaust port so as to be connected to the end portions,
The cylindrical guide portion is provided with a pair of upper and lower fitting contact portions that are fitted and contacted with the upper burring portion and the lower burring portion as the fitting contact portion, and the pair of end burring portions An exhaust structure for a hot water supply apparatus, wherein a pair of left and right abutting pieces that abut against the tip end are provided. An exhaust structure of a hot water supply device according to any one of claims 1 to 3,
The rectifying guide is an exhaust structure of a hot water supply apparatus, which is configured by combining first and second rectifying members in a form in which each of the mounting plate portion and the cylindrical guide portion is divided. An exhaust structure for a hot water supply apparatus according to claim 3,
The rectifying guide is configured by combining the first and second rectifying members in a form in which each of the mounting plate portion and the cylindrical guide portion is divided.
The first straightening member includes the pair of contact piece portions,
The exhaust structure of a hot water supply apparatus, wherein the second rectifying member includes a pair of pressing pieces for pressing the pair of contact pieces against the tip ends of the pair of end burring portions.   A hot water supply apparatus comprising the exhaust structure of the hot water supply apparatus according to any one of claims 1 to 5.

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