JP7351781B2 - water heater - Google Patents

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JP7351781B2
JP7351781B2 JP2020054809A JP2020054809A JP7351781B2 JP 7351781 B2 JP7351781 B2 JP 7351781B2 JP 2020054809 A JP2020054809 A JP 2020054809A JP 2020054809 A JP2020054809 A JP 2020054809A JP 7351781 B2 JP7351781 B2 JP 7351781B2
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combustion
heat exchanger
outer circumferential
circumferential surface
exhaust
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JP2021156452A (en
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順也 綿貫
竹年 田村
諒弥 及川
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Corona Corp
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Corona Corp
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Description

本発明は、給湯装置に関し、特に給湯装置内部の熱交換器の耐久性向上に関するものである。 The present invention relates to a water heater, and particularly to improving the durability of a heat exchanger inside the water heater.

従来よりこの種のものでは、板材を折り曲げて角筒状に形成したドラムの一方側に、複数のフィンとフィンを貫通するフィンパイプとを有する吸熱部と、角筒状のドラムの他方側に、内部に燃焼室が形成された燃焼胴と、燃焼胴の外周面に螺旋状に巻回されフィンパイプと連通するドラムパイプとを有する胴部とを備え、ドラムパイプが燃焼胴にロウ付け接合される熱交換器があった。（例えば、特許文献１参照。） Conventionally, this type of drum has a heat absorbing section having a plurality of fins and a fin pipe passing through the fins on one side of a drum formed into a rectangular tube shape by bending plate material, and a heat absorption section on the other side of the rectangular tube-shaped drum. , comprising a combustion shell in which a combustion chamber is formed, and a drum pipe that is spirally wound around the outer peripheral surface of the combustion shell and communicates with the fin pipe, and the drum pipe is brazed to the combustion shell. There was a heat exchanger. (For example, see Patent Document 1.)

特開平９－２９２１６０号公報Japanese Patent Application Publication No. 9-292160

この従来の熱交換器においては、胴部のドラム缶体の周囲に巻かれたドラムパイプが、燃焼室の温度上昇を抑える役割を持つ。しかしながら、熱交換器の内部に燃焼ガスの流れにくい速度が比較的遅い領域（以降、淀み領域という）が生じる箇所がある場合は、流れに偏りが発生し、淀み領域に近い熱交換器内壁の温度が低下して結露が発生する。燃焼室内で燃焼ガス中の水分が結露すると、酸性の凝縮水が発生し、ドラム缶体が銅製である場合、ドラム缶体の腐食・破損につながる恐れがあった。 In this conventional heat exchanger, a drum pipe wound around the drum body of the body has the role of suppressing the temperature rise in the combustion chamber. However, if there is a region inside the heat exchanger where the velocity of combustion gas is relatively low (hereinafter referred to as a stagnation region), the flow will be uneven, and the inner wall of the heat exchanger near the stagnation region will Temperature drops and condensation occurs. When moisture in the combustion gas condenses in the combustion chamber, acidic condensed water is generated, which could lead to corrosion and damage to the drum body if it is made of copper.

本発明は、上記の課題を解決すべく検討なされたもので、その目的は、結露の発生しやすい箇所の凝縮水の発生量を低減させ、ドラム缶体の腐食耐久性を向上させた給湯装置を提供することにある。 The present invention was developed to solve the above problems, and its purpose is to provide a water heater that reduces the amount of condensed water generated in areas where condensation is likely to occur and improves the corrosion resistance of the drum body. It is about providing.

上記の目的を達成するため、本発明の請求項１では、燃焼バーナの燃焼で発生した燃焼熱を、給水が流通する熱交換器で熱交換させ、熱交換後の燃焼ガスを排気経路を介して排気口より排出するものに於いて、前記熱交換器は、一方側に、所定の間隔で配列された複数のフィンと、該フィンを貫通するフィンパイプとを有する吸熱部を備えると共に、他方側に、内部に燃焼室が形成された燃焼胴と、該燃焼胴の外周面に螺旋状に巻回され、かつ該外周面にロウ付け接合され、前記フィンパイプと連通するドラムパイプとを有する胴部とを備える角筒状のドラムであり、前記排気経路は、前記熱交換器の内部を通過した直後の燃焼ガスを略直角に誘導する排気横路を備え、前記ドラムパイプと前記燃焼胴のロウ付け接合部において、前記燃焼胴の各側面のうち、前記排気横路の誘導方向とは反対方向に位置する側面の外周面への接合面積を他の側面の外周面の接合面積より小さくした。 In order to achieve the above object, in claim 1 of the present invention, combustion heat generated by combustion in a combustion burner is heat exchanged with a heat exchanger through which water supply flows, and the combustion gas after heat exchange is passed through an exhaust path. In the heat exchanger, the heat exchanger includes a heat absorbing part having a plurality of fins arranged at predetermined intervals on one side and a fin pipe passing through the fins, and , on the other side, a combustion barrel having a combustion chamber formed therein; and a drum pipe that is spirally wound around the outer peripheral surface of the combustion barrel, is brazed to the outer peripheral surface, and communicates with the fin pipe. The drum is a rectangular cylindrical drum having a body portion having a cylindrical shape, and the exhaust path is provided with an exhaust cross passage that guides combustion gas immediately after passing through the inside of the heat exchanger at a substantially right angle, and the drum pipe and the combustion gas are In the brazing joint of the combustion cylinder, the area of the side of the combustion cylinder located in the direction opposite to the guiding direction of the exhaust passageway is smaller than the area of the other side. did.

また、本発明の請求項２では、燃焼バーナの燃焼で発生した燃焼熱を、給水が流通する熱交換器で熱交換させ、熱交換後の燃焼ガスを排気経路を介して排気口より排出するものに於いて、前記熱交換器は、一方側に、所定の間隔で配列された複数のフィンと、該フィンを貫通するフィンパイプとを有する吸熱部を備えると共に、他方側に、内部に燃焼室が形成された燃焼胴と、該燃焼胴の外周面に螺旋状に巻回され、かつ該外周面にロウ付け接合され、前記フィンパイプと連通するドラムパイプとを有する胴部とを備える角筒状のドラムであり、前記排気経路は、前記熱交換器の内部を通過した直後の燃焼ガスを略直角に誘導する排気横路を備え、前記ドラムパイプと前記燃焼胴のロウ付け接合部において、前記燃焼胴の各側面のうち、前記熱交換器の出口に最も近い側面と対向する側面の外周面への接合面積を他の側面の外周面の接合面積より小さくした。 Furthermore, in claim 2 of the present invention, the combustion heat generated by combustion in the combustion burner is exchanged with a heat exchanger through which water supply flows, and the combustion gas after the heat exchange is passed through the exhaust path from the exhaust port. In the heat exchanger, the heat exchanger includes a heat absorption part having a plurality of fins arranged at predetermined intervals on one side and a fin pipe passing through the fins, and an internal heat exchanger on the other side. A combustion shell having a combustion chamber formed therein, and a drum pipe spirally wound around the outer circumferential surface of the combustion shell, brazed to the outer circumferential surface, and communicating with the fin pipe. The drum is a rectangular cylindrical drum, and the exhaust path includes an exhaust passage that guides the combustion gas immediately after passing through the heat exchanger at a substantially right angle, and the drum pipe is a brazed joint between the drum pipe and the combustion cylinder. Among the side surfaces of the combustion barrel, the surface area of the side surface closest to the outlet of the heat exchanger and the side surface opposite to the outer peripheral surface is made smaller than the surface area of the other side surfaces.

本発明の請求項１によれば、前記排気横路の誘導方向とは反対方向に位置する燃焼胴側面の外周面への接合面積を他の側面の外周面の接合面積より小さくしたので、前記ドラムパイプ内を流れる水によるドラム内壁の冷却作用による内壁の温度低下を抑えることができ、その結果、結露発生量を低減させることができ、銅製のドラムの腐食・破損を防止でき、給湯装置の耐久性向上に繋げることができる。 According to claim 1 of the present invention, since the joint area of the side surface of the combustion cylinder located in the opposite direction to the guiding direction of the exhaust cross passage to the outer circumferential surface is made smaller than the joint area of the outer circumferential surface of the other side surface, the drum It is possible to suppress the temperature drop of the inner wall due to the cooling effect of water flowing in the pipe on the inner wall of the drum, and as a result, it is possible to reduce the amount of dew condensation, prevent corrosion and damage to the copper drum, and improve the durability of the water heater. It can lead to sexual improvement.

本発明の請求項２によれば、前記熱交換器の出口に最も近い側面と対向する側面の外周面への接合面積を他の側面の外周面の接合面積より小さくしたので、前記ドラムパイプ内を流れる水によるドラム内壁の冷却作用による内壁の温度低下を抑えることができ、その結果、結露発生量を低減させることができ、銅製のドラムの腐食・破損を防止でき、給湯装置の耐久性向上に繋げることができる。 According to claim 2 of the present invention, the joint area of the side surface closest to the outlet of the heat exchanger and the side surface opposite to the outer circumferential surface is made smaller than the joint area of the outer circumferential surface of the other side surfaces. As a result, the amount of condensation generated can be reduced, preventing corrosion and damage to the copper drum, and improving the durability of the water heater. can be connected to.

本発明の実施形態１における給湯装置の説明図An explanatory diagram of a water heater in Embodiment 1 of the present invention 本発明の実施形態１における燃焼ガスの流れを説明する説明図An explanatory diagram illustrating the flow of combustion gas in Embodiment 1 of the present invention 本発明の実施形態１における側面Ａ面のロウ付け接合部の要部拡大図An enlarged view of the main parts of the brazed joint on the side surface A in Embodiment 1 of the present invention 本発明の実施形態１における側面Ａ面以外のロウ付け接合部の要部拡大図An enlarged view of the main parts of the brazed joint other than the side surface A in Embodiment 1 of the present invention 本発明の実施形態２における燃焼ガスの流れを説明する説明図Explanatory diagram illustrating the flow of combustion gas in Embodiment 2 of the present invention 本発明の実施形態３における燃焼ガスの流れを説明する説明図Explanatory diagram illustrating the flow of combustion gas in Embodiment 3 of the present invention 本発明の他の実施形態におけるロウ付け接合部の要部拡大図Enlarged view of main parts of a brazed joint in another embodiment of the present invention

以下に、本発明に係る給湯装置の実施の形態を図面に基づいて説明する。
１は本実施形態１の燃焼器としての給湯装置、２は石油やガス等を燃料とし下向きに火炎を発生する逆燃式の燃焼部である燃焼バーナ、３は燃焼バーナ２に燃焼用の空気を供給する送風機である。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, embodiments of a water heater according to the present invention will be described based on the drawings.
Reference numeral 1 denotes a water heater as a combustor of the first embodiment, 2 a combustion burner which is a reverse combustion type combustion section that uses oil or gas as fuel and generates flame downward, and 3 a combustion air supply to the combustion burner 2. It is a blower that supplies

６は、一方側に、所定の間隔で配列された複数のフィン５ａと、フィン５ａを貫通するフィンパイプ５ｂとを有する吸熱部５を備えると共に、他方側に、内部に燃焼室４ａが形成された燃焼胴４ｃと、燃焼胴４ｃの外周面に螺旋状に巻回され、かつ該外周面にロウ付け接合され、前記フィンパイプ５ｂと連通するドラムパイプ４ｂとを有する胴部４を備える角筒状のドラムで構成された熱交換器である。ここで、吸熱部５は、胴部４より燃焼ガスの流れ方向下流側に位置する。 6 is equipped with a heat absorption part 5 having a plurality of fins 5a arranged at predetermined intervals and a fin pipe 5b penetrating the fins 5a on one side, and has a combustion chamber 4a formed inside on the other side. A rectangular cylinder comprising a body 4 having a combustion cylinder 4c and a drum pipe 4b spirally wound around the outer peripheral surface of the combustion cylinder 4c, brazed to the outer peripheral surface, and communicating with the fin pipe 5b. This is a heat exchanger consisting of a shaped drum. Here, the heat absorbing section 5 is located on the downstream side of the body section 4 in the flow direction of the combustion gas.

７は燃焼室４ａと連通しており、吸熱部５の燃焼ガス流れ方向下流側に配置され、燃焼ガスの流れ方向を横向きに誘導する排気横路である。排気横路７は、一方側で熱交換器６と接続され、他方側で消音装置８と接続される。 Reference numeral 7 denotes an exhaust cross passage that communicates with the combustion chamber 4a, is disposed on the downstream side of the heat absorption part 5 in the flow direction of the combustion gas, and guides the flow direction of the combustion gas laterally. The exhaust cross-channel 7 is connected on one side with a heat exchanger 6 and on the other side with a silencer 8.

前記消音装置８は、燃焼バーナ２の燃焼に伴い発生する燃焼ガスの騒音を低減させるものであり、排気横路７と連通し、排気横路７よりも燃焼ガス流れ方向下流側に位置し、排気横路７の上方に配置される。消音装置８は上下方向に延在し、その上部に燃焼ガスを器具外部に排出する排気口９を備えている。 The muffling device 8 is for reducing the noise of combustion gas generated during combustion in the combustion burner 2, and communicates with the exhaust cross passage 7, is located downstream of the exhaust cross passage 7 in the combustion gas flow direction, and is connected to the exhaust cross passage 7. It is placed above 7. The muffling device 8 extends in the vertical direction, and is provided with an exhaust port 9 at its upper portion for discharging combustion gas to the outside of the device.

１０は給水管、１１は給湯装置１の器具外の給湯栓（図示せず）まで温水を供給する給湯管である。 10 is a water supply pipe; 11 is a hot water supply pipe that supplies hot water to a hot water tap (not shown) outside the water heater 1;

前記給水管１０からの給水は、熱交換器６に導入され、熱交換器６にて燃焼バーナ２の燃焼に伴い発生した高温の燃焼ガスと熱交換加熱され、給湯管１１を介して給湯栓からユーザの設定した給湯温度にて出湯されるものである。 The water supplied from the water supply pipe 10 is introduced into the heat exchanger 6, where it is heated by heat exchange with the high-temperature combustion gas generated by the combustion of the combustion burner 2, and then passed through the hot water supply pipe 11 to the hot water tap. Hot water is dispensed at the hot water temperature set by the user.

前記燃焼バーナ２の燃焼に伴い発生した燃焼ガスは、送風機３の送風力により、燃焼室４ａを下向きに流れ、吸熱部５を通過する。そして、吸熱部５を下向きに通過した燃焼ガスは、排気横路７にて下向きから上向きにＵターンされ、消音装置８を上向きに流入し、消音装置８を通過して排気口９から器具外に排出されるものである。 Combustion gas generated as a result of combustion in the combustion burner 2 flows downward through the combustion chamber 4 a due to the force blown by the blower 3 and passes through the heat absorption section 5 . The combustion gas that has passed downward through the heat absorbing section 5 is then made a U-turn from downward to upward at the exhaust cross passage 7, flows upward into the silencer 8, passes through the silencer 8, and exits the appliance from the exhaust port 9. It is something that is discharged.

次に、実施形態１について図２に基づいて説明する。
図２は、フィン５ａと、燃焼胴４ｃとその外周を巻回ししたドラムパイプ４ｂ、排気横路７と消音装置８の断面を示す説明図である。ここではまず、図２に示すように、熱交換器６と排気横路７の接合部であり熱交換器６の出口にあたる開口部４０が、角筒状の熱交換器６の底面の略中央に位置する場合について述べる。 Next, Embodiment 1 will be described based on FIG. 2.
FIG. 2 is an explanatory diagram showing cross sections of the fin 5a, the combustion cylinder 4c, the drum pipe 4b wound around the outer periphery of the fin 5a, the exhaust passage 7, and the muffling device 8. First, as shown in FIG. 2, the opening 40, which is the joint between the heat exchanger 6 and the exhaust cross passage 7 and which is the outlet of the heat exchanger 6, is located approximately at the center of the bottom of the rectangular cylindrical heat exchanger 6. Let's discuss the case where it is located.

図２のＡ面は、角筒状の熱交換器６の各側面のうち、排気横路７の誘導方向とは反対方向に位置する側面である。熱交換器６の内部を通過する燃焼ガスの流れは、熱交換器６の出口の位置と排気横路７による燃焼ガスの誘導方向の影響を受けて、熱交換器６内部で淀み領域が発生し、淀み領域が発生する場所の内壁では、内壁の温度が低下して結露が発生しやすい。図２のＡ面が、結露が発生しやすい面である。
本発明では、Ａ面、すなわち、排気横路７の誘導方向とは反対方向に位置する燃焼胴側面であり、この側面の外周面へのドラムパイプ４ｂの接合面積を、他の側面の外周面の接合面積より小さくする。 Surface A in FIG. 2 is a side surface of the rectangular cylindrical heat exchanger 6 that is located in a direction opposite to the direction in which the exhaust cross passage 7 is guided. The flow of combustion gas passing through the heat exchanger 6 is influenced by the position of the outlet of the heat exchanger 6 and the direction in which the combustion gas is guided by the exhaust passage 7, and a stagnation area occurs inside the heat exchanger 6. On the inner wall where the stagnation area occurs, the temperature of the inner wall decreases and condensation is likely to occur. Surface A in FIG. 2 is a surface where dew condensation is likely to occur.
In the present invention, the surface A, that is, the side surface of the combustion cylinder located in the direction opposite to the guiding direction of the exhaust cross passage 7, is the joining area of the drum pipe 4b to the outer circumferential surface of this side surface, and the area where the drum pipe 4b is joined to the outer circumferential surface of the other side surface is Make it smaller than the bonding area.

続いて、Ａ面とＡ面以外の外周面の接合面積について説明する。
図３、図４は、燃焼胴４ｃと燃焼胴４ｃの外周面にロウ付け接合されたドラムパイプ４ｂの要部拡大図である。図３に示すように、角筒状の燃焼胴４ｃの４面には、プレス加工等により成形され、燃焼胴４ｃの壁面から外側に向かって突出するビード３０が設けられている。このビード３０は、ドラムパイプ４ｂの下側に位置し、ビード３０によってドラムパイプ４ｂの外周円弧面に沿うようにビード３０が成形されており、ロウ材２０を介してドラムパイプ４ｂと燃焼胴４ｃが接合される。
ここで、ａは棒状のロウ材２０によって接合された燃焼胴４ｃとドラムパイプ４ｂの接合幅であり、ドラムパイプ４ｂの長さ方向に沿って燃焼胴４ｃの同一側面上では同一の幅で接合されており、接合面積と比例するものである。 Next, the bonding area between the A side and the outer circumferential surface other than the A side will be explained.
3 and 4 are enlarged views of the main parts of the combustion cylinder 4c and the drum pipe 4b brazed to the outer peripheral surface of the combustion cylinder 4c. As shown in FIG. 3, beads 30 are formed on four sides of the rectangular cylindrical combustion cylinder 4c by pressing or the like and protrude outward from the wall surface of the combustion cylinder 4c. This bead 30 is located below the drum pipe 4b, and is formed by the bead 30 so as to follow the outer circumferential arc surface of the drum pipe 4b. are joined.
Here, a is the joining width of the combustion cylinder 4c and the drum pipe 4b, which are joined by the rod-shaped brazing material 20, and the width is the same on the same side of the combustion cylinder 4c along the length direction of the drum pipe 4b. It is proportional to the bonding area.

図４はロウ材２０より径の大きいロウ材２１を使用した場合であり、接合幅はｂとなる。接合幅ａとｂの関係はａ＜ｂとなることから、接合面積についても同じ関係となる。本発明では、Ａ面に位置するドラムパイプ４ｂの接合においては、ロウ材２０を用いて比較的小さい接合面積を成し、Ａ面以外においてはロウ材２０より径の大きいロウ材２１を用いて比較的大きい接合面積を成すものである。
なお、燃焼ガスの流速の比較的早い側面だけをロウ材２１を用いて、他の流速の比較的遅い側面をロウ材２０を用いてロウ付けすることで、接合面積に差を設けるようにしてもよい。 FIG. 4 shows a case where a brazing material 21 having a larger diameter than the brazing material 20 is used, and the joining width is b. Since the relationship between the bonding widths a and b is a<b, the same relationship holds true for the bonding area. In the present invention, when joining the drum pipes 4b located on the A side, the brazing material 20 is used to form a relatively small joining area, and on the other side, the brazing material 21 having a larger diameter than the brazing material 20 is used. It forms a relatively large bonding area.
Note that by brazing only the side surface where the flow rate of combustion gas is relatively fast using the brazing material 21 and using the brazing material 20 on the other side surface where the flow rate is relatively slow, a difference is created in the bonding area. Good too.

以上により、排気横路７の誘導方向とは反対方向に位置する燃焼胴側面の外周面へのドラムパイプ４ｂの接合面積を、他の側面の外周面の接合面積より小さくしたので、ドラムパイプ４ｂの冷却効果が弱められ、結露の発生量を低減させることができ、腐食耐久性を向上させることができる。また、Ａ面ではＡ面以外で使用するロウ材より径の細い棒状ロウ材を使用でき、コスト削減にも貢献できる。 As described above, since the joint area of the drum pipe 4b to the outer circumferential surface of the side surface of the combustion cylinder located in the direction opposite to the guiding direction of the exhaust cross passage 7 is made smaller than the joint area of the outer circumferential surface of the other side surface, the drum pipe 4b The cooling effect is weakened, the amount of dew condensation generated can be reduced, and corrosion durability can be improved. Furthermore, a rod-shaped brazing material having a smaller diameter than the brazing material used for surfaces other than the A surface can be used on the A side, which can also contribute to cost reduction.

次に、実施形態２について図５に基づいて説明する。
図５に示すように、熱交換器６と排気横路７の接合部であり熱交換器６の出口にあたる開口部４０が角筒状のドラム底面の中央位置にない場合について述べる。熱交換器６の出口にあたる開口部４０が角筒状のドラム底面の中央位置にない場合は、熱交換器６の出口に最も近い側面に対向する側面付近で燃焼ガスの流れに淀み領域が発生し、内壁の温度が低下して結露が発生しやすくなる。
本発明では、熱交換器６の出口に最も近い側面と対向する側面（図５のＡ面）の外周面への接合面積を他の側面の外周面の接合面積より小さくした。これにより、ドラムパイプ４ｂの冷却効果が弱められ、結露の発生量を低減させることができ、腐食耐久性を向上させることができる。 Next, Embodiment 2 will be described based on FIG. 5.
As shown in FIG. 5, a case will be described in which the opening 40, which is the joint between the heat exchanger 6 and the exhaust passage 7 and corresponds to the outlet of the heat exchanger 6, is not located at the center of the bottom surface of the rectangular cylindrical drum. If the opening 40 corresponding to the outlet of the heat exchanger 6 is not located at the center of the bottom of the rectangular cylindrical drum, a stagnation area will occur in the flow of combustion gas near the side opposite to the side closest to the outlet of the heat exchanger 6. However, the temperature of the inner wall decreases and condensation is more likely to occur.
In the present invention, the bonding area of the side surface opposite to the side surface closest to the outlet of the heat exchanger 6 (surface A in FIG. 5) to the outer circumferential surface is made smaller than the bonding area of the other side surfaces to the outer circumferential surface. Thereby, the cooling effect of the drum pipe 4b is weakened, the amount of dew condensation generated can be reduced, and corrosion durability can be improved.

なお、図６は実施形態３の図であり、図５の熱交換器６の出口にあたる開口部４０が角筒状のドラム底面の中央位置にないという意味で同じ条件であるが、開口部４０の位置が図５とは異なる位置にあり、異なる実施形態の対応も可能であることを示すために記載した。 Note that FIG. 6 is a diagram of Embodiment 3, and the conditions are the same in the sense that the opening 40 corresponding to the outlet of the heat exchanger 6 in FIG. The position is different from that in FIG. 5, and is described to show that a different embodiment is also possible.

なお、接合面積を小さくするための他の方法としては、図７に示すように燃焼胴４ｃにビードを形成しないようにし、ロウ材２０を用いて接合幅ａより小さい接合幅ｃを形成するようにしてもよい。これにより、ｃ＜ａの関係から接合面積にも差を設けることができる。すなわち、Ａ面の外周面では燃焼胴４ｃにビードを形成せず、ロウ材２０を用いて接合し、Ａ面以外の外周面では燃焼胴４ｃにビードを形成して、ロウ材２０を用いて接合することで、Ａ面の結露の発生量を低減させることができ、腐食耐久性を向上させることができる。この場合、１台の熱交換器のドラムパイプ４ｂのロウ付け接合でロウ材２０を共通に用いることができ、ロウ材の太さ違いによる接合ミスを防止することもできる。 In addition, as another method for reducing the joint area, as shown in FIG. 7, a bead is not formed on the combustion cylinder 4c, and a joint width c smaller than the joint width a is formed using the brazing material 20. You can also do this. Thereby, it is possible to provide a difference in the bonding area due to the relationship c<a. That is, on the outer circumferential surface of side A, no bead is formed on the combustion cylinder 4c and the brazing material 20 is used to join the combustion cylinder 4c, and on the outer circumferential surface other than side A, a bead is formed on the combustion cylinder 4c and the brazing metal 20 is used. By joining, the amount of dew condensation generated on the A side can be reduced, and corrosion durability can be improved. In this case, the brazing material 20 can be commonly used for brazing and joining the drum pipes 4b of one heat exchanger, and it is also possible to prevent joining errors due to differences in the thickness of the brazing material.

なお、実施形態１から３では水道直圧式の給湯専用の給湯機を例に挙げて説明したが、本発明はこの実施形態に限定されるものでなく、同じく燃焼胴にドラムパイプをロウ付け溶接が必要な追い焚き機能付きの給湯機に適用してもよいものである。 In addition, in Embodiments 1 to 3, explanations have been given using a water heater exclusively for hot water supply using direct pressure from the tap as an example, but the present invention is not limited to this embodiment, and similarly, a drum pipe may be brazed and welded to the combustion barrel. The present invention may be applied to water heaters with a reheating function that require reheating.

また、本実施形態で用いたその他の構成は一例として提示したものであり、発明の範囲を限定することは意図しておらず、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲において、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると共に、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Further, the other configurations used in this embodiment are presented as examples, and are not intended to limit the scope of the invention, and may be implemented in various other forms. Various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

１ 給湯装置
２ 燃焼バーナ
４ 胴部
４ａ 燃焼室
４ｂ ドラムパイプ
４ｃ 燃焼胴
５ 吸熱部
５ａ フィン
５ｂ フィンパイプ
６ 熱交換器
７ 排気横路
１２ 排気経路 1 Water heater 2 Combustion burner 4 Body 4a Combustion chamber 4b Drum pipe 4c Combustion cylinder 5 Heat absorption part 5a Fin 5b Fin pipe 6 Heat exchanger 7 Exhaust cross passage 12 Exhaust route

Claims (2)

燃焼バーナの燃焼で発生した燃焼熱を、給水が流通する熱交換器で熱交換させ、
熱交換後の燃焼ガスを排気経路を介して排気口より排出するものに於いて、
前記熱交換器は、
一方側に、所定の間隔で配列された複数のフィンと、
該フィンを貫通するフィンパイプとを有する吸熱部
を備えると共に、
他方側に、内部に燃焼室が形成された燃焼胴と、
該燃焼胴の外周面に螺旋状に巻回され、かつ該外周面にロウ付け接合され、
前記フィンパイプと連通するドラムパイプとを有する胴部と
を備える角筒状のドラムであり、
前記排気経路は、
前記熱交換器の内部を通過した直後の燃焼ガスを略直角に誘導する排気横路を備え、
前記ドラムパイプと前記燃焼胴のロウ付け接合部において、
前記燃焼胴の各側面のうち、
前記排気横路の誘導方向とは反対方向に位置する側面の外周面への接合面積を
他の側面の外周面の接合面積より小さくしたことを特徴とする給湯装置。 The combustion heat generated by combustion in the combustion burner is exchanged with a heat exchanger through which water is supplied,
In those that discharge the combustion gas after heat exchange from the exhaust port via the exhaust route,
The heat exchanger is
a plurality of fins arranged at predetermined intervals on one side;
a heat absorbing section having a fin pipe penetrating the fin;
on the other side, a combustion shell having a combustion chamber formed therein;
spirally wound around the outer circumferential surface of the combustion barrel and brazed to the outer circumferential surface;
and a drum pipe that communicates with the fin pipe.
The exhaust route is
comprising an exhaust cross passage that guides the combustion gas immediately after passing through the inside of the heat exchanger at a substantially right angle;
At the brazed joint between the drum pipe and the combustion shell,
Of each side of the combustion shell,
A hot water supply device characterized in that a bonding area of a side surface located in a direction opposite to a guiding direction of the exhaust cross passage to an outer circumferential surface is smaller than a bonding area of the other side surface to the outer circumferential surface. 燃焼バーナの燃焼で発生した燃焼熱を、給水が流通する熱交換器で熱交換させ、
熱交換後の燃焼ガスを排気経路を介して排気口より排出するものに於いて、
前記熱交換器は、
一方側に、所定の間隔で配列された複数のフィンと、
該フィンを貫通するフィンパイプとを有する吸熱部
を備えると共に、
他方側に、内部に燃焼室が形成された燃焼胴と、
該燃焼胴の外周面に螺旋状に巻回され、かつ該外周面にロウ付け接合され、
前記フィンパイプと連通するドラムパイプとを有する胴部と
を備える角筒状のドラムであり、
前記排気経路は、
前記熱交換器の内部を通過した直後の燃焼ガスを略直角に誘導する排気横路を備え、
前記ドラムパイプと前記燃焼胴のロウ付け接合部において、
前記燃焼胴の各側面のうち、
前記熱交換器の出口に最も近い側面と対向する側面の外周面への接合面積を
他の側面の外周面の接合面積より小さくしたことを特徴とする給湯装置。 The combustion heat generated by combustion in the combustion burner is exchanged with a heat exchanger through which water is supplied,
In those that discharge the combustion gas after heat exchange from the exhaust port via the exhaust route,
The heat exchanger is
a plurality of fins arranged at predetermined intervals on one side;
a heat absorbing section having a fin pipe penetrating the fin;
on the other side, a combustion shell having a combustion chamber formed therein;
spirally wound around the outer circumferential surface of the combustion barrel and brazed to the outer circumferential surface;
and a drum pipe that communicates with the fin pipe.
The exhaust route is
comprising an exhaust cross passage that guides the combustion gas immediately after passing through the inside of the heat exchanger at a substantially right angle;
At the brazed joint between the drum pipe and the combustion shell,
Of each side of the combustion shell,
A hot water supply device characterized in that the joint area of the side surface closest to the outlet of the heat exchanger and the side surface opposite to the outer circumferential surface is smaller than the joint area of the outer circumferential surface of the other side surfaces.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001336887A (en) 2000-05-30 2001-12-07 Noritz Corp Heat exchanger
JP2021101130A (en) 2019-12-24 2021-07-08 株式会社ノーリツ Heat exchanger and water heating device equipped with the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63188469A (en) * 1987-01-30 1988-08-04 Gasutaa:Kk Manufacture of heat exchanger for water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001336887A (en) 2000-05-30 2001-12-07 Noritz Corp Heat exchanger
JP2021101130A (en) 2019-12-24 2021-07-08 株式会社ノーリツ Heat exchanger and water heating device equipped with the same

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