KR100643462B1 - Hot water supplier - Google Patents

Abstract

(Problem) In the hot water heater in which the gas combustion chamber 3A, the heat exchange part 4A, and the exhaust duct part 56 are arranged in this order from the lower side in the casing 9, it heat-exchanges with the gas combustion chamber 3A. The nonuniformity of the height dimension of the assembly of the part 4A is made small.

(Solution means) A pair of the combustion chamber right wall 33 and the heat exchange right wall 45 constituting the gas combustion chamber 3A and the heat exchange unit 4A, the combustion chamber left wall 34 and the heat exchange left wall ( Each pair of the pair of 46, the rear side wall 36 for a combustion chamber, and the rear side wall 48 for heat exchange is comprised by one sheet.

Description

Hot water heater {HOT WATER SUPPLIER}

1 is an exploded perspective view of an internal structure of a hot water heater according to an embodiment of the present invention.

2 is a longitudinal sectional view of the hot water heater according to the embodiment of the present invention.

3 is a partial cross-sectional view of the hot water heater according to the embodiment of the present invention.

4 is a cross-sectional view illustrating a method of manufacturing the heat exchanger 4.

5 is an exploded perspective view of an internal structure illustrating a hot water heater of a conventional example;

6 is an explanatory diagram of a conventional example;

Explanation of symbols on the main parts of the drawings

2-burner block 3A-gas combustion chamber

4A-Heat Exchanger 6-Exhaust Cover

9-casing 35-front wall for heat exchange

41-Heat absorbing fins 42-Water pipe

45-right side wall for heat exchange 46-left side wall for heat exchange

48-Rear wall for heat exchange 51-Exhaust vent

54-ceiling wall for duct 56-exhaust duct section

57-Right Wall for Duct 58-Left Wall for Duct

59-exhaust passage 60-exhaust passage

91-Exhaust windows 542-Rear wall for duct

The present invention relates to a hot water heater that aims to improve the accuracy of a height dimension of an aggregate of a heat exchanger and a gas combustion chamber for heating the heat exchanger.

5 is an exploded perspective view of the internal structure of a conventional water heater.

The burner block 2 which consists of a group of flat burners 21 and 21 arranged in parallel is accommodated in the rectangular combustion box 3, and the front end opening 30 of the combustion box 3 is carried out. The upper half portion is configured to be closed by the front plate 32, and gas is supplied to the burner block 2 from the gas distributor 1.

On the other hand, the heat exchanger (4) which is installed in the upper end opening 31 of the combustion box (3) is a rectangular cylindrical outer frame (40) which penetrates up and down, and the heat absorbing fins are arranged in a plurality of the outer mold (40) (41, 41), and the water supply pipes (42, 42) penetrating the side walls of the heat absorbing fins (41, 41) and the outer frame (40), the upstream end of the water pipes (42, 42) A copper pipe (not shown) or the like is connected to the pipe 420 and the downstream end thereof.

A flange 40A protrudes on the outer periphery of the lower end of the outer frame 40, and fitting slits S1 and S1 are formed on the flange 40A. When assembling the heat exchanger 4 and the combustion box 3, a packing is interposed between the joints of the two heat exchangers 4 and the upper edge of the combustion box 3 with respect to the sandwiching slits S1 and S1. Caulking stone pieces S2 and S2 that are standing up are inserted and bent, thereby caulking the heat exchanger 4 and the combustion box 3 (see FIGS. 5 and 6).

On the other hand, the exhaust duct body 5 which is provided in succession to the upper end opening 43 of the heat exchanger 4 is formed in the shape of a flat rectangular box in which the lower side and the front side are opened, and the lower end opening of the exhaust duct body 5 is opened. Caulking stone pieces S3 and S3 are drooping on the outer circumferential flange 53 of 52. And this caulking stone piece S3, S3 is caulking fixed by the aspect which rolls out from the outer side with respect to the outer periphery flange 44 of the upper end part of the heat exchanger 4. As shown in FIG. And the hot water supply main body which consists of the assembly of the combustion box 3, the heat exchanger 4, and the exhaust duct main body 5 combined in this way is suitably arrange | positioned and fixed to the casing 9 with a bracket etc.

In addition, the exhaust port cover 6 is fixed to the exhaust port 51 portion of the downstream end of the exhaust duct body 5 by screws b and b, and the exhaust cylinder protrudes from the exhaust port cover 6 ( 60 is loosely fitted in the exhaust window 91 opened in the front cover 90 of the casing 9 of the water heater.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2003-21319 (Fig. 1)

However, in the conventional one, since the combustion box 3 and the heat exchanger 4 are composed of independent parts, non-uniformity of the vertical dimension at the time of assembly is likely to occur, and heat exchange with these combustion boxes 3 is caused. The precision of the height dimension of the combined body of group 4 worsens. In addition, since the packing for securing airtightness is interposed between the combustion box 3 and the heat exchanger 4, non-uniformity in the dimensions during assembly also occurs, and the combustion box 3 and the heat exchanger 4 The accuracy of the height dimension of the assembly becomes worse.

As a result, in the conventional ones, there were the following problems.

1. The nonuniformity of the arrangement height of the upstream end 420 of the water flow pipe 42 provided in the heat exchanger 4 becomes large, and the smooth piping connection work, such as a copper pipe, with respect to the upstream end 420 is hindered.

2. The height position of the exhaust port cover 6 fixed to the exhaust duct body 5 connected to the upper end of the heat exchanger 4 is easily shifted up and down with respect to the exhaust window 91 of the casing 9. . As a result, in the assembly of the mechanism, there is a case where the exhaust cylinder 60 of the exhaust cover 6 and the exhaust window 91 of the casing 9 cannot be fitted smoothly.

The present invention has been made in view of these points,

"A hot water heater in which the gas combustion chamber, the heat exchange part, and the exhaust duct part are arranged in this order from the lower side in the casing 9,

The gas combustion chamber is an upper open space surrounded by four side walls of the combustion chamber right side wall, the combustion chamber left side wall, the combustion chamber front side wall, and the combustion chamber rear side wall, and accommodates the burner block 2,

The heat exchange part includes a plurality of heat absorbing fins 41 and 41 and the heat absorbing fins 41 installed in a rectangular space surrounded by four side walls of a heat exchange right side wall, a heat exchange left side wall, a heat exchange front side wall, and a heat exchange rear wall. In the hot water heater composed of water pipes 42 and 42 penetrating through 41, the upstream ends 420 of the water pipes 42 and 42 are made smaller by reducing the non-uniformity of the height dimension of the combination of the combustion chamber and the heat exchange unit. Assembly work, such as the work of copper pipe piping for the pipe), or the work of fitting the exhaust pipe 60 of the exhaust cover 6 provided in the exhaust duct part with the exhaust window 91 on the casing 9 side. The subject is to make it possible to carry out smoothly.

[Invention regarding claim 1]

Technical means of the invention according to claim 1 for solving the above problems,

"The pair of the said right side wall for a combustion chamber and the said right side wall for heat exchange, the pair of the left side wall for a said combustion chamber, the left side wall for a heat exchange, the said front side wall for a combustion chamber of the rear side wall for a said combustion chamber, and the rear side wall for a heat exchange, Each pair of the pair of front side walls for heat exchange is composed of one sheet.

According to the above technical means, each of the constituent walls connected up and down among the constituent walls of the gas combustion chamber and the heat exchange part is composed of one sheet. Accordingly, the height dimension of the entire combination of the gas combustion chamber and the heat exchanger in the gas combustion chamber and the heat exchanger, which is divided up and down, is less likely to be disturbed due to assembly errors.

[Invention regarding claim 2]

In the invention according to claim 1,

It can be said that "each of each said 1 sheet is comprised from the same material."

If each one plate is comprised from the other material from which a thermal expansion rate differs, respectively, each of said one plate performs thermal expansion of the extended amount different from an up-down direction by gas burning. As a result, a large thermal stress acts on the engaging portions of each of the one plates, and the engaging portions tend to be damaged with time. On the other hand, in the invention according to claim 2, since each one plate is made of the same material having the same coefficient of thermal expansion, each one plate thermally expands at the same rate during gas combustion, whereby No stress is applied.

Therefore, there is less worry that the said coupling part will break over time.

[Invention regarding claim 3]

In the invention according to claim 1 or 2,

Each of the single plates constituting the pair of the right side wall for the combustion chamber and the right side wall for the heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange, is made of a stainless material,

The water pipes 42 and 42 pass through the right wall for heat exchange and the left wall for heat exchange, and the water pipes 42 and 42 and the heat absorbing fins 41 and 41 are made of copper. Composed,

The penetrating portions of the water pipes 42 and 42 with respect to the heat absorbing fins 41 and 41 are soldered.

In this case, since the right and left plates constituting the right side wall for heat exchange and the left side wall for heat exchange are made of stainless material, mechanical strength is improved as compared with the case of copper material. Therefore, there is less worry that the heat exchanger or the like will be damaged by the impact during shipping, transportation or installation of the hot water heater. In addition, since the single sheet is made of a stainless material, heat resistance is improved as compared with the copper material, and deterioration with time can be suppressed.

Further, in the invention according to claim 3, since the penetrating portions of the water pipes 42 and 42 for each of the single plates constituting the right wall for heat exchange and the left wall for heat exchange are not substantially fixed, the water pipes 42, Even if 42) repeats thermal expansion and contraction in the longitudinal direction, the thermal stress is not applied to the penetrating portion, and there is less worry that the heat exchange portion will be broken.

That is, the heat absorbing fins 41 and 41 and the water pipes 42 and 42 made of copper material are soldered to each other. The heat absorbing fins 41 and 41 and the water pipes 42 and 42 are generally as follows. Are soldered together in a furnace.

That is, the water supply pipes 42 and 42 pass through the heat absorbing fins 41 and 41 group, and at the boundary between the outer circumferential surface of the water supply pipes 42 and 42 and the heat absorbing fins 41 and 41 in the penetrating portion. Interpose the solder material appropriately. In addition, a pair of left and right pairs of left and right plates which pass through both ends of the water pipes 42 and 42 through the left and right plates (consisting of stainless steel) constituting the right side wall for heat exchange and the left side wall for heat exchange, The aggregate of the water pipes 42 and 42 and the heat absorbing fins 41 and 41 are heated in the furnace to melt the solder material. The heat absorbing fins 41 and 41 and the water pipes 42 and 42 are soldered by melting the solder material, but the water pipes 42 and 42 for the single plate are formed because the left and right plates are made of stainless steel. Even if a solder material flows into the penetrating portion, the single sheet and the water pipes 42 and 42 are not substantially soldered. This is because the solder member combines the heat absorbing fins 41 and 41 and the water pipes 42 and 42 made of copper material, so that the left and right plates made of stainless steel and the water pipes 42 and 42 are not substantially bonded.

Therefore, when the water pipes 42 and 42 repeat thermal expansion and contraction in the longitudinal direction with the combustion and extinguishing of the gas, the water pipes 42 and 42 slide with respect to the single plate in the penetrating portion. As a result, an excessive force does not act on the penetrating portion. Therefore, it is possible to prevent damage to the heat exchanger.

[Invention regarding claim 4]

In the invention according to claims 1 to 3,

Each of the pair of the right side wall for the combustion chamber and the right side wall for the heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange, the pair of the rear side wall for the combustion chamber and the rear side wall for the heat exchange, In the circumferential boundary portion of each of the one plates to be joined together by locking seaming caulking, the coupling portions of each one plate are joined by high seaming locking seam, so There is no need for special packing to ensure a good quality, and the parts score is reduced.

[Invention regarding claim 5]

In the invention according to the claims 1 to 4,

"The heat exchange front side wall is attached to and detached from a single plate constituting each pair of the pair of the right side wall for the combustion chamber and the right side wall for the heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange. Attached as much as possible, by removing the screw, the front wall for heat exchange can be removed, whereby the inside of the heat exchange part can be easily maintained.

[Invention regarding claim 6]

In the invention according to claims 1 to 5,

"The exhaust duct part has an exhaust passage opened to the lower side and the front side surrounded by the right side wall for ducts, the left side wall for ducts, the rear side wall for ducts, and the four walls of the duct ceiling wall,

Each of the pair of the right side wall for the duct and the right side wall for the combustion chamber, the pair of the left side wall for the duct and the left side wall for the combustion chamber, the pair of the rear side wall for the duct and the rear side wall for the heat exchange, It consists of a sheet, and the component wall connected up and down among the structural walls from a gas combustion chamber to an exhaust duct part is comprised by one sheet, and the precision of the height dimension of the whole hot water supply base body becomes high.

[Invention regarding Claim 7]

In the invention according to claim 6,

"The said duct ceiling wall of the said exhaust duct part is a thing in which the said single plate which comprises the pair of the said heat exchange rear wall and the said duct rear wall extended."

In this case, since the duct ceiling wall, the duct rear wall, and the heat exchange rear wall are constituted by one sheet, the duct ceiling wall, the duct rear wall, and the like can be formed only by bending the single sheet. Special work for joining the duct ceiling wall and the duct rear wall, etc. becomes unnecessary.

[Invention regarding Claim 8]

In the invention according to claims 1 to 6,

"The exhaust pipe 60 of the exhaust port cover 6 connected in front of the exhaust port 51 which is the exhaust passage downstream end of the said exhaust duct part is inserted into the exhaust window 91 opened in the said casing 9. ego,

The exhaust port cover 6 and the heat exchange front side wall are constituted by a single plate, and in the case where the exhaust cylinder 60 is formed by drawing the single plate, the exhaust plate is formed by drawing the single plate. Since the 60 is formed, it is not necessary to produce the exhaust cover 6 independent of the front wall for heat exchange, and the number of parts can be reduced, and the parts management can be simplified.

(The best form to carry out invention)

EMBODIMENT OF THE INVENTION Below, the best form for implementing this invention is demonstrated with reference to an accompanying drawing.

As shown to FIG. 1, FIG. 2, the hot water heater which concerns on this embodiment of the gas combustion chamber 3A, the heat exchange part 4A which is an arrangement | positioning part of the heat exchanger 4 above, and the heat exchanger 4 The exhaust duct part 56 formed between the rectifying blade 55 arrange | positioned horizontally on the upper side and the ceiling wall 54 for ducts on the upper side has the structure provided in this order from the lower side.

Hereinafter, the detail of each part is demonstrated.

[Gas combustion chamber 3A]

The gas combustion chamber 3A is an arrangement of the burner block 2, and includes a combustion chamber right side wall 33 and a combustion chamber left side wall 34, a combustion chamber front side wall 35 and a combustion chamber rear side wall 36. Moreover, it is formed in the rectangular open box shape of the upper side surrounded by the combustion chamber bottom wall 37. As shown in FIG. In addition, as shown in FIG. 1, FIG. 3, the both edges E of the whole area | region from the said combustion chamber bottom wall 37 through the combustion chamber rear side wall 36 to the duct ceiling wall 54 mentioned later. (E) is a single plate constituting the left side wall 34 for the combustion chamber, the left side wall 46 for the heat exchange, and the left side wall 58 for the duct, and the right side wall 33 for the heat exchanger and the heat exchanger described later. It is fixed by the caulking part H (refer FIG. 3) with respect to the periphery part G of the single plate which comprises the right side wall 45 and the right side wall 57 for ducts.

1 and 2, the discharge port of the air supply fan F is connected to the air supply port 370 provided in the combustion chamber bottom wall 37. As shown in FIG.

The burner block 2 disposed in the gas combustion chamber 3A is composed of a group of flat burners 21 and 21 arranged in the left and right directions, and a burner case 20 for storing the group of flat burners 21 and 21. The gas is supplied to the flat burners 21 and 21 at the lower end portions of the combustion chamber left and right walls 34 and 33 and the combustion chamber front wall 35 to be described later and the tip end standing pieces 373 of the combustion chamber bottom wall 37. The gas distributor 1 is fixed by screws 19 and 19.

The left and right ends of the combustion chamber front side wall 35 are fixed to the combustion chamber right side wall 33 and the combustion chamber left side wall 34 by screws 28 and 28, and the combustion chamber front side wall 35 is formed. An ignition device 39 for igniting the burner block 2, a flame detector 38 for detecting the flame generated in the flat burners 21 and 21, and an ignition confirmation window 29 are formed. have.

[Heat exchanger 4A]

The heat exchanger 4A is an arrangement of the heat exchanger 4, and as shown in FIGS. 1 to 3, the heat exchanger 4 includes a right side wall 45 for heat exchange and a left side wall for heat exchange facing in the transverse direction. (46), a rectangular shape surrounded by the front wall 47 for heat exchange and the rear wall 48 for heat exchange facing each other in the front-rear direction, and the respective right wall 45 for heat exchange and the rear wall 48 for heat exchange. A plurality of heat absorbing fins 41 and 41 disposed in the space and water passing pipes 42 and 42 penetrating the heat absorbing fins 41 and 41 are provided. In addition, the both ends of the water pipes 42 and 42 penetrate the right side wall 45 for heat exchange and the left side wall 46 for heat exchange to the outside. It is connected.

The heat exchange right side wall 45 is composed of the combustion chamber right side wall 33 and the duct right side wall 57 described later and one sheet, and the heat exchange left side wall 46 is the combustion chamber left side wall ( 34) and the left side wall 58 for ducts mentioned later and one plate, and the heat exchange front side wall 47 consists of the said combustion chamber front side wall 35 and below-mentioned exhaust cover 6, and one plate, Further, the heat exchange rear wall 48 is constituted by the combustion chamber rear wall 36, the duct rear wall 542 described later, and one sheet. Each of these sheets is formed of a stainless material. On the other hand, the heat absorbing fins 41 and 41, the water pipes 42 and 42, and the U-shaped pipes 42A and 42A constituting the heat exchanger 4 are made of a copper material, and the heat absorbing fins 41 and 41 and the water pass-through. The pipes 42 and 42 and the U-shaped pipes 42A and 42A are soldered with a solder material made of a phosphorus-copper material.

Next, the manufacturing operation of the heat exchanger 4 is demonstrated.

As shown in FIG. 4, the water pipes 42 and 42 pass through the through-holes 410 and 410 of the heat absorbing fins 41 and 41, and the water pipes 42 and 42 and the through holes in the through part. The linear solder material 100, 100 is interposed between the inner circumferences of the holes 410, 410. In addition, the both ends of the water pipes 42 and 42 pass through the right wall 45 for heat exchange and the left wall 46 for heat exchange which constitute a part of one sheet on the left and right sides of the adjacent water pipes 42 and 42. The outer ends are connected to each other by U-shaped pipes 42A and 42A, and in this state, the above-mentioned one sheet and the aggregates of the water pipes 42 and 42 and the heat absorbing fins 41 and 41 are jig 18. Support it. The aggregate is then heated in a furnace to melt the solder materials 100 and 100. Then, the heat absorbing fins 41 and 41 and the water pipes 42 and 42 are soldered by melting the solder members 100 and 100, but the heat exchange right side wall 45 and the left side wall 46 for heat exchange are formed. Since each sheet is made of stainless steel, the molten solder material 19 flows into the through portions of the water pipes 42 and 42 to the right side wall 45 for heat exchange or the left side wall 46 for heat exchange. Even if it exists, these heat exchange right side wall 45, the heat exchange left side wall 46, and the water flow pipes 42 and 42 are not substantially soldered. Therefore, when the water flow pipes 42 and 42 repeat thermal expansion and contraction in the longitudinal direction with the point and fire of the burner block 2 which will be described later, the water pipes 42 and 42 are It slides with respect to the left and right side walls 46 and 45 for heat exchange, and a dynamic load does not apply to the said penetration part by this. Therefore, the damage of the heat exchange part 4A can be prevented.

[Exhaust duct section 56]

As shown in FIG. 1, the exhaust duct part 56 provided in the upper side of 4 A of heat exchange parts is the right side wall 57 for ducts, the left side wall 58 for ducts, and the rear side wall 542 for ducts. And a duct ceiling wall 54. The entire range from the ducted ceiling wall 54 to the ducted rear wall 542 and the like to the combustion chamber bottom wall 37 is produced by bending a single plate made of a stainless material.

A rectifying blade 55 is horizontally installed between the duct ceiling wall 54 and the top and bottom of the heat exchanger 4, and as shown in FIGS. 2 and 3, the duct ceiling wall 54 is used for the duct ceiling. The inner surface of the portion connected to the side wall 542 and the rectifying blade 55 serve as the exhaust passage 59.

As shown in FIG. 2, the range from the ducted ceiling wall 54 to the arcuate rear end 540 is in the foreground position toward the downstream end (front end) of the exhaust passage 59. In addition, the range from the upper surface to the rear surface of the rectifying blade 55 is parallel to the range connected from the ducted ceiling wall 54 to the arcuate rear end portion 540. In addition, as shown in FIG. 1, both sides 560 and 560 of the rectifying blade 55 are fixed to the left and right side walls 58 and 57 for the duct by screws b and b.

[Exhaust vent cover 6]

The exhaust port cover 6 provided in series with the exhaust port 51 of the downstream end of the exhaust duct part 56, the front side wall 47 for heat exchange, and the front side wall 35 for the combustion chamber are formed of one sheet. In addition, by drawing the upper portion of the single plate to the front, an exhaust pipe 60 penetrating back and forth is formed. The front end of the exhaust cylinder 60 is loosely fitted to the exhaust window 91 provided in the front cover 90 covering the opening of the front end of the case main body 92 constituting the casing 9. The front cover 90 is detachably attached to the front end opening of the case body 92 by screws 95 and 95.

In addition, the periphery of the single plate constituting the exhaust cover 6 and the front side wall 47 for heat exchange is the right side wall 45 for heat exchange with the screws 28, 28 and the other screws 470, 470. The single plate on the right side constituting the right side wall 57 for duct, the left side plate constituting the left side wall 46 for heat exchange, the left side wall 58 for duct, and the like, and the ceiling wall 54 for duct It is fixed in the state which can be removed with respect to the front-end | tip part 543. As shown in FIG. Therefore, by removing the screws 470 and 470, one plate constituting the exhaust cover 6, the front wall 47 for heat exchange and the front wall 35 for the combustion chamber is removed, thereby maintaining the inside of the heat exchanger 4. It can be performed easily.

In this case, the exhaust cylinder 60 is formed by drawing and processing the single plate constituting the heat exchange front wall 47 and the exhaust cover 6, thereby requiring the production of an independent exhaust cover 6 Not. Therefore, the number of parts can be reduced, and the parts management can be simplified.

[Actual use]

In this case, when the burner block 2 is combusted to start the hot water supply operation, the combustion exhaust in the burner block 2 passes through the heat exchanger 4 to the inclined bottom surface 550 of the rectifying blade 55. Flows through the gap between the rear end of the rectifying blade 55 and the arc-shaped rear end 540 of the duct ceiling wall 54 from the exhaust passage 59 to the exhaust port 51 to the exhaust cover 6. Emitted to the atmosphere.

On the other hand, the to-be-heated water which flows through the water flow pipes 42 and 42 is heated up and heated by the said combustion exhaust gas which passes through the heat exchanger 4, and is supplied to the hot water supply site | omitted out of illustration.

In this, among the structural walls of the gas combustion chamber 3A and the heat exchange part 4A, the combustion chamber right side wall 33 and the heat exchange right side wall 45 which are connected up and down, and the combustion chamber left side wall 34, Each of the left side wall 46 for heat exchange, the rear side wall 36 for the combustion chamber, and the rear side wall 48 for the heat exchange is composed of one sheet. Therefore, it differs from the above-mentioned conventional thing which assembles the gas combustion chamber 3A and heat exchange part 4A divided | segmented up and down, and the upper and lower dimension of the whole combination of 3 A of gas combustion chambers and 4 A of heat exchange parts is changed by an assembly error, etc. Distractions can be reduced. Therefore, the up-and-down position of the piping connection part of the upstream end part and the downstream end part of the water flow pipe 42 is also correctly determined, and by this, piping connection work, such as a copper pipe with respect to the said pipe connection part, can be performed smoothly.

Moreover, the front cover of the exhaust pipe 60 and the casing 9 of the exhaust port cover 6 attached to the downstream end 51 of the exhaust duct part 56 formed above the gas combustion chamber 3A and the heat exchange part 4A. The exhaust window 91 opened in the 90 is not easily shifted in the vertical direction, whereby the work for fitting the exhaust window 91 into the exhaust cylinder 60 can be smoothly performed.

In the hot water heater according to the above embodiment, the single plate constituting the combustion chamber front side wall 35, the heat exchange front side wall 47, and the exhaust port cover 6, the combustion chamber right wall 33, and the heat exchange right side wall ( 45) and the single plate which comprises the duct right side wall 57, the single side plate which comprises the combustion chamber left side wall 34 and the heat exchange left side wall 46, and the duct left side wall 58, and the combustion chamber bottom wall 37 Since the single plates constituting the range from the duct to the ceiling wall 54 for ducts are all made of a stainless material which is the same material, they all expand and contract with the same thermal expansion coefficient even if they are heated up at the time of hot water supply. Therefore, each of these sheets differs from the case where they are composed of heterogeneous materials having different thermal expansion coefficients, and a large thermal stress acts on the mounting portions of the screws 470, 470, 28, and 28, and the caulking portions H, which are their coupling portions. Instead, there is less worry that these coupling portions will break with time.

[Etc]

1. In the above embodiment, the right side wall 33 for the combustion chamber, the right side wall 45 for the heat exchange, the left side wall 34 for the combustion chamber, the left side wall 46 for the heat exchange, the rear side wall 36 for the combustion chamber, and the heat exchanger Although each of the side wall 48, the combustion chamber front wall 35 and the heat exchange front wall 47 was formed of a single sheet without a seamless, the combustion chamber right wall 33 and the heat exchange right wall 45 It consists of a single plate bonded up and down by locking seam caulking, the left side wall 34 for the combustion chamber, the left side wall 46 for the heat exchange, the rear side wall 36 for the combustion chamber, and the rear side wall 48 for the heat exchange. And each of the combustion chamber front side wall 35 and the heat exchange front side wall 47 may also be constituted by one sheet bonded up and down by lock seaming caulking as described above.

2. In the above embodiment, the duct ceiling wall 54 is composed of a single plate in common with the rear wall 48 for heat exchange and the rear wall 542 for ducting. The ceiling wall 54 may be formed by extending the structural wall of the exhaust cover 6. That is, even if the structural wall of the exhaust port cover 6 is extended upward, the extension part is bent backward (in the direction of the rear side wall 542 for the duct), and the rear bent part may be employed as the ceiling wall 54 for the duct. do.

The present invention has the following unique effects.

Since each of the components connected up and down among the component walls of the gas combustion chamber and the heat exchange part is composed of one sheet, the combination of the gas combustion chamber and the heat exchange part is different from the above-described conventional method of assembling the gas combustion chamber and the heat exchange part divided up and down. The overall height dimension is less likely to be disturbed due to assembly errors or the like, and the dimensional accuracy thereof is improved. Therefore, the piping connection of the copper pipe with respect to the upstream end part 420 of the water flow pipes 42 and 42 can be performed smoothly.

In the invention according to claim 2, since each one plate is made of the same material having the same thermal expansion coefficient, each one plate or the like repeats thermal expansion and contraction at the same ratio with burning and extinguishing of the gas. As a result, since thermal stress does not act on the joint portions of each of the single sheets, there is less worry that the joint portions will be damaged over time.

In the invention according to claim 3, since the single plate constituting the right side wall for the combustion chamber and the right side wall for heat exchange, and the single plate constituting the left side wall for the combustion chamber and the left side wall for heat exchange are composed of a stainless material, Compared with one sheet, mechanical strength is improved. Moreover, compared with the case where it consists of copper materials, heat resistance improves and deterioration with time can be prevented. In addition, as described above, since the left and right plates and the water pipes 42 and 42 are substantially in an unbonded state, the water pipes 42 and 42 are thermally expanded in the longitudinal direction with the combustion and extinguishing of the gas. Even if the contraction and repetition are repeated, an excessive force does not act on the penetrating portions of the water pipes 42 and 42 with respect to the left and right plates, so that breakage of the heat exchange unit can be prevented.

In the invention according to claim 4, since the joining portions of each of the single plates are joined by high airtight locking seaming, no special packing is required to ensure the airtightness of the joining portions, so that the number of parts is reduced. .

In the invention according to claim 5, since the front wall for heat exchange can be removed by removing the screw, the inside of the heat exchange part can be easily maintained.

In the invention according to claim 6, as described above, the component walls connected up and down among the component walls from the gas combustion chamber to the exhaust duct section are composed of one sheet, and the accuracy of the height dimension of the entire hot water supply body is increased.

In the invention according to claim 7, the above-described duct ceiling wall and duct rear wall can be constituted only by bending a single plate, so that no special work for joining the duct ceiling wall and the duct rear wall or the like is necessary. Done.

In the invention according to claim 8, since the exhaust cover 6 and the front wall for heat exchange are constituted by one sheet, it is not necessary to produce an independent exhaust cover 6, and the number of parts can be reduced. This can simplify parts management.

Claims (8)

As a hot water heater in which the gas combustion chamber, the heat exchange part, and the exhaust duct part are arranged in this order from the lower side in the casing 9, The gas combustion chamber is an upper open space surrounded by four side walls of the combustion chamber right wall, the combustion chamber left wall, the combustion chamber front side wall, and the combustion chamber rear wall, and accommodates the burner block 2, The heat exchange part includes a plurality of heat absorbing fins 41 and 41 and the heat absorbing fins 41 installed in a rectangular space surrounded by four side walls of a heat exchange right side wall, a heat exchange left side wall, a heat exchange front side wall, and a heat exchange rear wall. In the hot water heater composed of water pipes (42, 42) passing through the, The pair of the right side wall for the combustion chamber and the right side wall for the heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange, the front side wall for the combustion chamber, and the pair of the rear side wall for the combustion chamber and the rear side wall for the heat exchange, and the The hot water heater of each pair of the pair of front wall for heat exchange is comprised by one sheet. The method according to claim 1, Each hot water heater is composed of the same material. The method according to claim 1 or 2, Each of the plates constituting each pair of the pair of the right side wall for the combustion chamber and the right side wall for heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange, is made of a stainless material, The water pipes 42 and 42 penetrate the right wall for heat exchange and the left wall for heat exchange, and the water pipes 42 and 42 and the heat absorbing fins 41 and 41 are made of copper. It is, The water heater is characterized in that the through portion of the water pipes (42, 42) to the heat absorbing fins (41, 41) is soldered. The method according to claim 1 or 2, Each pair of the pair of the right side wall for the combustion chamber and the right side wall for heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange, the pair of the rear side wall for the combustion chamber and the rear side wall for the heat exchange, The hot water heater according to claim 1, wherein the boundary portions in the circumferential direction of the respective sheets are joined by locking seam caulking. The method according to claim 1 or 2, The front side wall for heat exchange is detachable by screws with respect to a single plate constituting each pair of the pair of the right side wall for the combustion chamber and the right side wall for the heat exchange, the pair of the left side wall for the combustion chamber and the left side wall for the heat exchange. Hot water heater, characterized in that attached to. The method according to claim 1 or 2, The exhaust duct section includes an exhaust passage opened to the lower side and the front side surrounded by the right side wall for the duct, the left side wall for the duct, the rear side wall for the duct, and the four walls of the duct ceiling wall, Each of the pair of the right side wall for the duct and the right side wall for the combustion chamber, the pair of the left side wall for the duct and the left side wall for the combustion chamber, the pair of the rear side wall for the duct and the rear side wall for the heat exchange, Hot water heater, characterized in that consisting of a sheet. The method according to claim 6, The said duct ceiling wall of the said exhaust duct part is a hot water heater characterized by the extension of the said 1 sheet which comprises the pair of the said back wall for heat exchange and the said back wall for duct. The method according to claim 1 or 2, The exhaust pipe 60 of the exhaust port cover 6 connected to the exhaust port 51 which is the exhaust passage downstream end of the exhaust duct part is inserted into the exhaust window 91 opened in the casing 9. , The exhaust port cover (6) and the front wall for heat exchange are constituted by a single plate, and the exhaust pipe (60) is formed by drawing the single plate.

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