KR20060043521A - 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, the said heat exchange part 4A and exhaust gas are exhausted. The nonuniformity of the height dimension of the assembly of the duct part 56 is made small.

(Solution means) A pair of the heat exchange right side wall 45 and the duct right side wall 57, the heat exchange left side wall 46 and the duct left side wall constituting the heat exchange part 4A and the exhaust duct part 56. Each pair of pairs of 58, a pair of rear side wall 48 for heat exchange, and a rear side wall 542 for duct is composed of 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, in which the height dimension of the aggregate of the heat exchange part and the exhaust duct part is improved.

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 heat absorbing fins (41, 41) and the water pipes (42, 42) passing through the side wall of the outer frame (40).

In addition, the exhaust duct main body 5 which is provided in succession to the upper end opening 43 of the heat exchanger 4 is formed in the shape of the flat rectangular box which opens the lower side and the front side, As shown in FIG. A packing 50 is interposed between the outer circumferential flange 53 of the lower end opening 52 of the duct body 5 and the outer circumferential flange 44 of the upper end of the heat exchanger 4. In this state, the two outer circumferential flanges 53 and 44 are engaged by caulking, screws, or the like. The exhaust port cover 6 is connected to the exhaust port 51 of the downstream end of the exhaust duct main body 5, and the exhaust port cover 6 is provided with an exhaust cylinder 60 which passes back and forth. The attachment flange 61 formed around the rear end of the exhaust cylinder 60 is fixed to the outer flange 511 of the distal end of the exhaust duct body 5 by screws b and b, and the exhaust cylinder 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 heat exchanger 4 and the exhaust duct body 5 are composed of independent parts, non-uniformity of dimensions during assembly is likely to occur, and these heat exchanger 4 and the exhaust duct body are likely to occur. The precision of the height dimension of the combined body of (5) worsens. Moreover, since the packing 50 is interposed in the connection part of the heat exchanger 4 and the exhaust duct main body 5, this also causes the nonuniformity of the dimension at the time of assembly, and the heat exchanger 4 and the exhaust duct main body 5 ), The accuracy of the height dimension of the combination becomes worse. As a result of the non-uniformity of the above-mentioned dimensions, the draft of the height dimension of the assembly is further worsened, whereby, for example, the exhaust port cover 6 is provided for the exhaust window 91 of the casing 9. ), The exhaust cylinder 60 is easily shifted up and down. As a result, when the product is assembled, there is a problem that 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 heat exchange part includes a plurality of heat absorbing fins 41 and 41 and the heat absorbing fins installed in a rectangular space surrounded by four side walls of the heat exchange right side wall, the heat exchange left side wall, the heat exchange front side wall, and the heat exchange rear wall. It consists of water pipes 42 and 42 penetrating through 41 and 41,

The exhaust duct section includes a right side wall for duct and a left side wall for duct and a rear side wall for duct extending upward from each of the right side wall for heat exchange, the left side wall for heat exchange, and the rear side wall for heat exchange, and a duct ceiling In the hot water heater having an exhaust passage open to the lower side and the front side surrounded by four walls of the wall, the casing 9 is made smaller by making the nonuniformity of the height dimension of the combination of the heat exchange part and the exhaust duct part small. It is possible to prevent the relative position of the opened exhaust window 91 and the exhaust cylinder 60 from greatly shifting up and down, thereby fitting the exhaust cylinder 60 with the exhaust window 91 during assembly. It is a subject to make it possible to perform smoothly.

[Invention regarding claim 1]

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

"Each pair of the said heat exchange right side wall and the said duct right side wall, the said heat exchange left side wall and the said duct left side wall, the said heat exchange side wall and the said duct side wall, each pair, It consists of one sheet.

According to the above technical means, each of the constituent walls connected up and down among the constituent walls of the heat exchange part and the exhaust duct part is composed of one sheet. Accordingly, the height dimension of the entire combination of the heat exchange part and the exhaust duct part is less disturbed by the assembly error or the like, unlike the above-described conventional method of coupling the heat exchange part and the exhaust duct part divided up and down.

[Invention regarding claim 2]

In the invention according to claim 1,

"Each of each said 1 sheet and the said front wall for heat exchange are all comprised from the same material."

When each single plate or the heat exchange front wall is made of different materials having different thermal expansion coefficients, when each of the single plates or the joint portion of this one and the heat exchange front wall is heated by gas combustion, the first plate or heat exchanger The front wall undergoes thermal expansion of different amounts of extension in the vertical direction. As a result, a large thermal stress acts on the coupling portions such as the respective one sheets, and the coupling portions tend to be damaged with time. On the other hand, in the invention according to claim 2, since each one plate and the front side wall for heat exchange are both made of the same material with the same coefficient of thermal expansion, each one plate or the like thermally expands at the same rate during gas combustion. By the thermal stress is not applied to the coupling portion.

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 plates constituting each pair of the pair of the right side wall for heat exchange and the right side wall for duct, the pair of left side wall for heat exchange and the left side wall for duct, 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 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, the right and left plates constituting the heat exchange right side wall and the heat exchange left side wall (consisting of stainless steel) penetrate both ends of the water pipes 42 and 42, and the left and right pairs of single plate and water flow in this state. The assembly of tubes 42, 42 and endothermic fins 41, 41 are heated in a 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,

"A pair of said right heat exchange wall and said duct right wall, a pair of said heat exchange left wall and said duct left wall, a pair of said heat exchange rear wall and said duct rear wall, respectively In the circumferential boundary portion of each of the single plates to be joined together by caulking, since the joining portions of each of the single plates are joined by high airtight caulking, a special packing for securing the airtightness of the joining portion is provided. This is no longer necessary and the number of parts is reduced.

[Invention regarding claim 5]

In the invention according to the claims 1 to 4,

"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 composed of one sheet, the duct ceiling wall and the duct rear wall can be formed only by bending the single sheet. There is no need for special work for joining the duct ceiling wall and the duct rear wall.

[Invention regarding claim 6]

In the invention according to claims 1 to 5,

"The said heat exchange front side wall is removable by a screw with respect to the single plate which comprises each pair of the said heat exchange right side wall and the said duct right side wall, the said heat exchange left side wall, and the said duct left side wall pair. In the case where it is attached, the front wall for heat exchange can be removed by removing the screw, whereby the inside of the heat exchange part can be easily maintained.

[Invention regarding Claim 7]

In the invention according to claims 1 to 6,

"The exhaust port cover 6 and the said heat exchange front side wall which are connected to the exhaust port 51 which is an exhaust port downstream end of the said exhaust duct part, and the said front side wall for heat exchange consist of one sheet plate, In the case where the exhaust cylinder 60 protruding forward from the cover 6 is formed, the exhaust cylinder 60 is formed by drawing the single sheet, so that the exhaust port cover 6 independent of the front wall for heat exchange is formed. There is no need to manufacture, so that the number of parts can be reduced, and the parts management can be simplified.

[Invention regarding Claim 8]

In the invention according to claims 1 to 7,

"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 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 front side wall for the combustion chamber and the front side wall for the heat exchange, the rear side wall for the combustion chamber and the heat exchange Each pair of the rear side walls of the back side wall is composed of one sheet, and the wall from the gas combustion chamber to the exhaust duct section consists of a series of plates up and down, and the height dimension of the whole hot water supply body Increases the accuracy.

(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 in 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 the 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. 1 and 3, both side edges 371 and 371 of the portion extending from the combustion chamber bottom wall 37 to the combustion chamber rear side wall 36 are lower sides of the combustion chamber left and right side walls 34 and 33. The portions extending from 340 and 330 to the rear sides 341 and 331 are fixed by the caulking portion 372 (see FIG. 3). The combustion chamber bottom wall 37, the combustion chamber rear wall 36, and the combustion chamber left and right walls 34, 33 are formed of an aluminum plated steel sheet in this embodiment.

Moreover, the discharge port of the air supply fan F is connected to the air supply port 370 provided in the bottom wall 37 for combustion chambers.

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

[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), the heat exchange front side wall 47 facing the front and rear direction, and the rear side wall 48 for the heat exchange, and a plurality of endotherms arranged in a rectangular space surrounded by each of the side walls 45 to 48. Fins 41 and 41 and water pipes 42 and 42 penetrating the heat absorbing fins 41 and 41 are also 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 right side wall 45 for heat exchange, the left side wall 46 for heat exchange, the front side wall 47 for heat exchange, and the rear side wall 48 for heat exchange are made of stainless material, while the heat absorbing fins 41, 41, The water pipes 42 and 42 and the U-pipes 42A and 42A are made of copper material, and the heat absorbing fins 41 and 41, the water pipes 42 and 42 and the U-tubes 42A and 42A are phosphorus-. It is soldered by the solder material which consists of copper materials.

As shown in Fig. 2, the lower side of the heat exchange front wall 47 and the upper side of the combustion chamber front wall 35 are joined by a highly airtight locking caulking unit 350. This eliminates the need for packing for securing airtightness at the joint.

In the present embodiment, the combustion chamber front wall 35 is formed of an aluminum plated steel sheet.

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 right side wall 45 for heat exchange (consisting of the right side wall 57 and the single plate for duct mentioned later) and the left side wall 46 for the heat exchange (consisting of the left side wall 58 for duct mentioned later and single plate) Pass through both ends of the water pipes 42 and 42, and the outer ends of the adjacent water pipes 42 and 42 are connected to each other by the U-shaped pipes 42A and 42A. Single plate constituting the wall 45, the right wall 57 for the duct, the left wall 46 for the heat exchange, and the left wall 58 for the duct, and the water pipes 42 and 42 and the heat absorbing fins 41 and 41. The assembly such as) is supported by the jig 18. 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 material 100 and 100, but the heat exchange right side wall 45 and the heat exchange left side wall 46 are made of stainless steel. Since it is comprised, even if the solder material 19 melted in the penetration part of the water flow pipes 42 and 42 with respect to the said heat exchange right side wall 45 and the heat exchange left side wall 46 may flow in, The right side wall 45 for heat exchange, the left side wall 46 for heat exchange, and the water flow pipes 42 and 42 are not substantially soldered. Therefore, when the water pipes 42 and 42 repeat thermal expansion and contraction in the longitudinal direction with the point and fire of the burner block 2 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]

The exhaust duct part 56 which is provided in the upper side of the heat exchange part 4A in succession is the right side wall 57 for ducts and the left side wall 58 for ducts, the rear side wall 542 for ducts, and the duct ceiling The wall 54 is provided, and the right side wall 57 for ducts is the right side wall 45 for heat exchange mentioned above, and the left side wall 58 for duct is the said left side wall 46 for heat exchange, respectively, stainless steel. It consists of one sheet of material. In addition, the duct rear wall 542, the duct ceiling wall 54 and the heat exchange rear wall 48 are also produced by bending a single plate made of a stainless material in an L shape.

3, the lower side of the single plate which comprises the heat exchange right side wall 45 and the duct right side wall 57 is the locking seaming caulking part 450 with respect to the combustion chamber right side wall 33. As shown in FIG. Both sides of the single plate constituting a range from the rear side wall 48 for heat exchange to the duct ceiling wall 54 for the heat exchange are fixed in the airtight state (see FIG. 3). A caulking portion 541 is connected to each of the single plate constituting the 45 and the right side wall 57 for the duct, and the single plate constituting the left side wall 46 for the heat exchange and the left side wall 58 for the duct. It is fixed.

A rectifying blade 55 is horizontally formed 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 part connected to the side wall 542 and the commutation wing 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 top surface to the rear surface of the rectifying blade 55 is parallel to the range connected from the duct 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.

In addition, as shown in FIG. 2, the lower side of the rear side wall 48 for heat exchange and the upper side of the rear side wall 36 for the combustion chamber are joined by the locking seam caulking unit 480.

[Exhaust vent cover 6]

The exhaust port cover 6 provided in series with the exhaust port 51 at the downstream end of the exhaust duct part 56 is composed of the front wall 47 for heat exchange and a single sheet, and the upper portion of the single sheet is forward. By drawing, the exhaust cylinder 60 which penetrates 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 of the casing 9, and the front cover 90 is sheared at the front end of the casing 9. Removably attached to the minor opening by screws 95 and 95.

In addition, the periphery of the single plate which comprises the exhaust port cover 6 and the front side wall 47 for heat exchange is 1 which comprises the right side wall 45 for heat exchange, and the right side wall 57 for duct by screws 470 and 470. It is fixed in the state which can be removed with respect to the sheet, the single plate which comprises the left side wall 46 for heat exchange, and the left side wall 58 for ducts, and the standing-up piece 543 of the tip part of the ceiling wall 54 for ducts. . Therefore, by removing the screws 470 and 470, if one sheet constituting the front wall 47 for heat exchange is removed, the inside of the heat exchanger 4 can be easily maintained.

In this case, the exhaust pipe 60 is formed by drawing and processing the single plate constituting the heat exchange front wall 47 and the exhaust cover 6 so that the independent exhaust port cover 6 is not required. . As a result, 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 case, among the constituent walls of the heat exchange part 4A and the exhaust duct part 56, the right side wall 45 for heat exchange, the right side wall 57 for duct, and the left side wall 46 for heat exchange, Each of the left side wall 58 for the duct, and the rear side wall 48 for the heat exchange and the rear side wall 542 for the duct is composed of one sheet. Accordingly, the upper and lower dimensions of the entire combination of the heat exchanger 4A and the exhaust duct part 56 are different from the conventional ones for assembling the heat exchanger 4A and the exhaust duct part 56 divided up and down. Discomfort caused by such, etc. can be reduced. Therefore, the exhaust window 60 of the exhaust port cover 6 of the exhaust port cover 6 and the front cover 90 of the casing 9 do not easily shift in the vertical direction, whereby the exhaust window 91 ) Can be smoothly fitted into the exhaust cylinder 60.

In the hot water heater according to the above embodiment, one sheet constituting the front side wall 47 for heat exchange and the exhaust port cover 6, one sheet constituting the right side wall 45 for heat exchange and the right side wall 57 for duct, The single plates constituting the left side wall 46 for heat exchange and the left side wall 58 for duct and the single plate constituting the range from the rear side wall 48 for heat exchange to the ceiling wall 54 for duct are all made of the same material. Since it is made of a stainless material, even if they are heated up at the time of hot water supply, they all expand and contract by the same thermal expansion rate. Therefore, each of these sheets is different from the case where they are composed of heterogeneous materials having different thermal expansion coefficients, and large thermal stress does not act on the mounting portions of the screws 470 and 470 or the caulking portions 541 as these coupling portions. There is less worry that the joint will break over time.

[Etc]

1. In the above embodiment, the single plate constituting the rear side wall 36 for the combustion chamber and the bottom wall 37 for the combustion chamber, the right side wall 33 for the combustion chamber, and the left side wall 34 for the combustion chamber, and the front side wall 35 for the combustion chamber. ) Was composed of an aluminum plated steel sheet. On the contrary, a pair of the rear side wall 36 for the combustion chamber, the bottom wall 37 for the combustion chamber, the rear side wall 48 for the heat exchange, the ceiling wall 54 for the duct, the right side wall 33 for the combustion chamber, and the right side wall for the heat exchange ( 45) and a pair of duct right wall 57, a pair of combustion chamber left wall 34 and a heat exchange left wall 46 and a duct left wall 58, a combustion chamber front wall 35 and a heat exchanger You may comprise each pair of the pair of the side wall 47 and the exhaust cover 6 by a single plate made of stainless steel.

In this way, the structural walls from the gas combustion chamber 3A to the exhaust duct part 56 are constituted by a series of single plates up and down, and the accuracy of the height dimension of the entire hot water supply body is increased.

2. In the above embodiment, the duct ceiling wall 54 is composed of a single plate in common with the rear wall 48 for the heat exchange and the rear wall 542 for the duct, but as in the invention according to claim 8, the duct The ceiling wall 54 may be formed by extending the constituent 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 which are connected up and down among the constituent walls of the heat exchange part and the exhaust duct part is composed of one sheet, the heat exchange part and the exhaust are different from those of the conventional art assembling the heat exchange part and the exhaust duct part divided up and down. The height dimension of the entire assembly of the duct is less likely to be disturbed due to assembly errors or the like, and the dimensional accuracy thereof is improved.

In the invention according to claim 2, since each one plate and the front wall for heat exchange are both made of the same material having the same thermal expansion rate, each one plate or the like is repeated at the same ratio with the combustion and extinguishing of gas. do. As a result, thermal stress does not act on each of the plates or on the joint between the front plates for heat exchange, so that the joint is less likely to break over time.

In the invention according to claim 3, 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 a stainless material, mechanical strength is improved as compared with one sheet of copper material. 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 the single sheets are joined by high airtight caulking, no special packing for securing the airtightness of the joining portions is required, and the number of parts is reduced.

In the invention according to claim 5, since the duct ceiling wall and the duct rear wall can be constituted only by bending a single plate, no special work for joining the duct ceiling wall and the duct rear wall is necessary. Done.

In the invention according to claim 6, 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 7, since the exhaust cover 6 and the front wall for heat exchange are composed of 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.

In the invention according to claim 8, the constituent walls from the gas combustion chamber to the exhaust duct section are constituted by a series of single plates up and down, and the accuracy of the height dimension of the entire hot water supply body is increased.

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 heat exchange part includes a plurality of heat absorbing fins 41 and 41 and the heat absorbing fins installed in a rectangular space surrounded by four side walls of the heat exchange right side wall, the heat exchange left side wall, the heat exchange front side wall, and the heat exchange rear wall. It consists of water pipes 42 and 42 penetrating through 41 and 41, The exhaust duct section includes a right side wall for duct and a left side wall for duct and a rear side wall for duct extending upward from each of the right side wall for heat exchange, the left side wall for heat exchange, and the rear side wall for heat exchange, and a duct ceiling In a hot water heater having an exhaust passage opened to the lower side and the front side surrounded by four walls of the wall, Each of the pair of the heat exchange right side wall and the duct right side wall, the heat exchange left side wall and the duct left side wall, the heat exchange rear side wall and the duct rear side wall, each pair is 1 Hot water heater, characterized in that consisting of a sheet. The method according to claim 1, Each of the one sheet and the front side wall for heat exchange are all made of the same material. The method according to claim 1 or 2, Each of the single plates constituting each pair of the heat exchange right side wall and the duct right side wall, the heat exchange left side wall and the duct left side wall, 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 any one of claims 1 to 3, Each pair of the pair of the right side wall for heat exchange and the right side wall for duct, the pair of left side wall for heat exchange and the left side wall for duct, the pair of rear side wall for heat exchange and the rear side wall for duct The hot water heater according to claim 1, wherein the boundary portions in the circumferential direction of each sheet are joined by caulking. The method according to any one of claims 1 to 4, 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 any one of claims 1 to 5, 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 heat exchange and the right side wall for duct, the pair of left side wall for heat exchange and the left side wall for duct. Hot water heater, characterized in that attached to. The method according to any one of claims 1 to 6, The exhaust port cover 6 and the heat exchange front side wall which are connected to the exhaust port 51 which is the exhaust passage downstream end of the exhaust duct part and the front side wall for heat exchange are constituted by a single plate, and the exhaust plate cover is formed by drawing the single plate. A hot water heater, characterized in that an exhaust pipe (60) projecting forward from (6) is formed. The method according to any one of claims 1 to 7, 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 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 front side wall for the combustion chamber and the front side wall for the heat exchange, the rear side wall for the combustion chamber and the heat exchange The hot water heater according to claim 1, wherein each of the pairs of the rear side walls is composed of one sheet.

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