JP2021096006A - Combustion device and manufacturing method of combustion device - Google Patents

Combustion device and manufacturing method of combustion device Download PDF

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JP2021096006A
JP2021096006A JP2019225265A JP2019225265A JP2021096006A JP 2021096006 A JP2021096006 A JP 2021096006A JP 2019225265 A JP2019225265 A JP 2019225265A JP 2019225265 A JP2019225265 A JP 2019225265A JP 2021096006 A JP2021096006 A JP 2021096006A
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outer frame
combustion gas
blade
exhaust port
louver body
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JP7315447B2 (en
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阿部　進
Susumu Abe
進 阿部
竹年 田村
Taketoshi Tamura
竹年 田村
高志 内山
Takashi Uchiyama
高志 内山
諒弥 及川
Ryoya Oikawa
諒弥 及川
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Corona Corp
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Corona Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

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Abstract

To provide a combustion device in which a louver body can be formed integrally therewith, and wind noise at the passage of a combustion gas is hardly generated, and a manufacturing method of the combustion device.SOLUTION: A combustion device 1 having an exhaust port 11 for discharging a combustion gas generated at a combustor 3 to the outside comprises a louver body 12 for regulating a flow direction of the combustion gas progressing toward the exhaust part 11, and the louver body 12 has: an outer frame part 16 forming a contour; a plurality of long-plate shaped blade parts 17 aligned inside the outer frame part 16 with clearances therebetween; an opening part 19 which is formed while penetrating the lover body 12 in a thickness direction, and located between the blade parts 17; and a connecting part 20 for connecting the outer frame part 16 and the blade parts 17. The outer frame part 16, the blade parts 17, and the connecting part 20 are integrally formed, the blade parts 17 have a pair of folded parts 18 which are formed while being folded toward the same faces so that both end edges forming long sides oppose each other, the blade parts 17 are inclined upward toward the exhaust port 11, and a certain face of the folded parts 18 is oriented to the exhaust port 11 side.SELECTED DRAWING: Figure 6

Description

本発明は、燃焼装置、および燃焼装置の製造方法に関するものである。 The present invention relates to a combustion device and a method for manufacturing the combustion device.

従来この種のものでは、燃焼ガスを外部に排出させる排気口を備えたものにおいて、排気口に向かう燃焼ガスの流れ方向を規制するルーバ体を設けたものがあった。（例えば、特許文献１参照。） Conventionally, in this type of thing, in the one provided with an exhaust port for discharging the combustion gas to the outside, the one provided with a louver body for regulating the flow direction of the combustion gas toward the exhaust port. (See, for example, Patent Document 1.)

特開平９−１９６４７２号公報Japanese Unexamined Patent Publication No. 9-196472

ところで、この従来のものでは、前記ルーバ体を構成する複数の長板状の羽根部および羽根部を支持する外枠部が別部材となっており、部品点数および組み付け工数が多く、製造コストの増大を招くと共に、各部材の寸法誤差により組み付けた際にガタツキが生じるおそれがあった。また、燃焼ガスが前記ルーバ体を通過する際、燃焼ガスは羽根部の長辺をなす角張った端縁に接触しながら通過するため、大きな風切り音が発生してしまうものであった。 By the way, in this conventional one, a plurality of long plate-shaped blades constituting the louver body and an outer frame portion supporting the blades are separate members, and the number of parts and assembling man-hours are large, resulting in high manufacturing cost. In addition to causing an increase, there is a risk of rattling when assembled due to dimensional errors of each member. Further, when the combustion gas passes through the louver body, the combustion gas passes while contacting the angular edge forming the long side of the blade portion, so that a loud wind noise is generated.

そこで、本発明は、ルーバ体を別部材の組み合わせで構成することがなく、さらに、燃焼ガスが通過する際の風切り音が発生しにくい燃焼装置、および燃焼装置の製造方法を提供することを目的とする。 Therefore, an object of the present invention is to provide a combustion device in which the louver body is not composed of a combination of separate members, and a combustion device in which wind noise when the combustion gas passes is less likely to be generated, and a method for manufacturing the combustion device. And.

本発明は上記課題を解決するために、請求項１では、 筐体内に収容され被加熱流体を加熱する燃焼器と、前記燃焼器で発生した燃焼ガスを外部に排出させる排気口と、を備えた燃焼装置において、前記排気口に向かう前記燃焼ガスの流れ方向を規制するルーバ体を設け、前記ルーバ体は、前記ルーバ体の外郭をなす外枠部と、前記外枠部の内方であって、互いに間隔を介して並べられた複数の長板状の羽根部と、前記ルーバ体を、前記ルーバ体の厚み方向に貫いて形成され、複数の長板状の羽根部の相互間に位置し、前記燃焼ガスが通過する開口部と、前記外枠部と前記羽根部との間を連結する連結部と、を有し、前記外枠部と前記羽根部と前記連結部とは一体に形成され、前記羽根部は、長辺をなす両端縁が対向するよう同一面に向かって折り返されて形成される一対の折り返し部を有し、前記羽根部は、前記排気口に向かって上り傾斜をなし、且つ前記折り返し部のある面が前記排気口側を向いているものとした。 In order to solve the above problems, the first aspect of the present invention includes a combustor housed in a housing for heating the fluid to be heated, and an exhaust port for discharging the combustion gas generated by the combustor to the outside. In the combustion device, a louver body that regulates the flow direction of the combustion gas toward the exhaust port is provided, and the louver body is an outer frame portion forming an outer shell of the louver body and an inner side of the outer frame portion. A plurality of long plate-shaped blades arranged at intervals from each other and the louver body are formed by penetrating in the thickness direction of the louver body, and are located between the plurality of long plate-shaped blades. It has an opening through which the combustion gas passes and a connecting portion that connects the outer frame portion and the blade portion, and the outer frame portion, the blade portion, and the connecting portion are integrally formed. The blade portion is formed and has a pair of folded portions formed by being folded toward the same surface so that both end edges forming long sides face each other, and the blade portion is inclined upward toward the exhaust port. And the surface with the folded-back portion faces the exhaust port side.

また、請求項２では、燃焼装置の製造方法であって、前記燃焼装置に備えられ、燃焼ガスを外部に排出させる排気口に向かう燃焼ガスの流れ方向を規制するルーバ体の製造工程において、前記ルーバ体の外郭をなす外枠部と、前記外枠部の内方に設けられた複数の長板状の羽根部と、前記ルーバ体の厚み方向に貫いて形成され複数の長板状の羽根部の相互間に位置する開口部と、前記外枠部と前記羽根部との間を連結する連結部と、を平板状の板部材を打ち抜いて一体に形成する打ち抜き工程と、前記羽根部の長辺をなす両端縁が対向するよう同一面に向かって折り返して一対の折り返し部を形成する折り返し工程と、前記連結部と前記外枠部との境界部分である外枠境界部と、前記連結部と前記羽根部との境界部分である羽根境界部との間に設けられた折り曲げ部を支点にして折り曲げ、前記羽根部が、前記排気口に向かって上り傾斜をなすようにし、且つ前記折り返し部のある面が前記排気口側を向くように折り曲げる曲げ工程と、を備えているものとした。 Further, the second aspect of the present invention is a method for manufacturing a combustion device, which is described in the manufacturing process of a louver body provided in the combustion device and which regulates a flow direction of a combustion gas toward an exhaust port for discharging the combustion gas to the outside. An outer frame portion forming an outer shell of the louver body, a plurality of long plate-shaped blade portions provided inside the outer frame portion, and a plurality of long plate-shaped blades formed through the thickness direction of the louver body. A punching step of punching a flat plate member to integrally form an opening located between the portions and a connecting portion connecting the outer frame portion and the blade portion, and the blade portion of the blade portion. A folding step of folding back toward the same surface so that both end edges forming long sides face each other to form a pair of folded portions, an outer frame boundary portion which is a boundary portion between the connecting portion and the outer frame portion, and the connection. The blade portion is bent with a bent portion provided between the portion and the blade boundary portion, which is the boundary portion between the portion and the blade portion, as a fulcrum so that the blade portion inclines upward toward the exhaust port and is folded back. It is assumed that a bending step of bending so that a surface having a portion faces the exhaust port side is provided.

この発明の請求項１によれば、ルーバ体を構成する外枠部と羽根部と連結部とは、溶接による接合や締結部材による結合がなされることなく、同一の材料によって一体に形成されている。つまり、ルーバ体は別部材を組み合わせて構成する必要がなく、一体で形成されるため、部品点数および組み付け工数の増加を抑制することができ、製造コストの増大を抑制できると共に、部材同士の組み付けがなくガタツキが生じるおそれがないものである。 According to claim 1 of the present invention, the outer frame portion, the blade portion, and the connecting portion constituting the louver body are integrally formed of the same material without being joined by welding or joining by a fastening member. There is. That is, since the louver body does not need to be configured by combining separate members and is formed integrally, it is possible to suppress an increase in the number of parts and assembly man-hours, suppress an increase in manufacturing cost, and assemble the members to each other. There is no risk of rattling.

また、羽根部は、羽根部の長辺をなす両端縁が対向するよう同一面に向かって折り返されて一対の折り返し部が形成され、長辺をなす両端縁が折り返された状態の羽根部は、排気口に向かって上り傾斜をなし、折り返し部のある面が排気口側を向いている。そうすると、燃焼ガスの流れ方向（前後方向）において、燃焼ガスの流れ方向最上流側の羽根部の端部となる位置、および燃焼ガスの流れ方向最下流側の羽根部の端部となる位置が、折り返し部の折り返し部分であり、その部分が曲面となっており、燃焼ガスが羽根部を通過する際、燃焼ガスが羽根部の端部に当たっても風切り音を発生させるようなことがなく、羽根部での風切り音がほとんど生じず、燃焼ガスの吹き出しに伴う騒音を極めて少なくすることができるものである。さらに、羽根部において、折り返し部のある面が排気口側を向くようになっており、折り返し部のある面には燃焼ガスは当たりにくくなっているため、折り返し部の先端の角張った端縁に燃焼ガスが当たりにくく、風切り音の発生を抑制することができ、燃焼ガスの吹き出しに伴う騒音を極めて少なくすることができるものである。 Further, the blade portion is folded toward the same surface so that both end edges forming the long side of the blade portion face each other to form a pair of folded portions, and the blade portion in a state where both end edges forming the long side are folded back is , It slopes up toward the exhaust port, and the surface with the folded part faces the exhaust port side. Then, in the combustion gas flow direction (front-rear direction), the position of the blade portion on the most upstream side of the combustion gas flow direction and the position of the blade portion on the most downstream side of the combustion gas flow direction are located. , It is a folded part of the folded part, and that part is curved, and when the combustion gas passes through the blade part, even if the combustion gas hits the end part of the blade part, it does not generate wind noise, and the blade There is almost no wind noise in the part, and the noise caused by the blowing out of the combustion gas can be extremely reduced. Further, in the blade portion, the surface with the folded portion faces the exhaust port side, and the combustion gas is hard to hit the surface with the folded portion. It is difficult for the combustion gas to hit, the generation of wind noise can be suppressed, and the noise caused by the blowing out of the combustion gas can be extremely reduced.

また、請求項２によれば、同一の材料によって一体に形成することができると共に、風切り音の発生を抑制することができ、燃焼ガスの吹き出しに伴う騒音を極めて少なくしたルーバ体を備えた燃焼装置を製造することができる。 Further, according to claim 2, combustion is provided with a louver body which can be integrally formed of the same material, can suppress the generation of wind noise, and extremely reduce the noise associated with the blowing out of combustion gas. The device can be manufactured.

本発明の一実施形態の燃焼装置を示す斜視図。The perspective view which shows the combustion apparatus of one Embodiment of this invention. 同一実施形態の燃焼装置を示す概略構成図。The schematic block diagram which shows the combustion apparatus of the same embodiment. 要部斜視図。A perspective view of the main part. 要部分解斜視図。An exploded perspective view of the main part. ルーバ体を示す斜視図。The perspective view which shows the louver body. ルーバ体を示す正面図。Front view showing the louver body. ルーバ体のＡ−Ａ断面図。AA cross-sectional view of the louver body. 各部を折り曲げる前の平板状のルーバ体を示す図。The figure which shows the flat plate-shaped louver body before bending each part. 平板状のルーバ体における折り返し箇所または折り曲げ箇所を示す図。The figure which shows the folded-back part or the bent part in a flat plate-shaped louver body. ルーバ体の製造工程である折り返し工程を説明する図。The figure explaining the folding back process which is the manufacturing process of a louver body. ルーバ体の製造工程である曲げ工程を説明する図。The figure explaining the bending process which is the manufacturing process of a louver body. ルーバ体を構成する羽根部に対する燃焼ガスの流れを説明する図。The figure explaining the flow of the combustion gas with respect to the blade part constituting a louver body.

次に、本発明の一実施形態の燃焼装置について図面に基づいて説明する。 Next, the combustion apparatus according to the embodiment of the present invention will be described with reference to the drawings.

１は本実施形態の燃焼装置としての給湯装置、２は給湯装置１の筐体、３は筐体２内に収容され被加熱流体（水）を加熱する燃焼器としてのバーナである。ここでは、バーナ３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ものとする。 Reference numeral 1 denotes a hot water supply device as a combustion device of the present embodiment, 2 is a housing of the hot water supply device 1, and 3 is a burner as a combustor housed in the housing 2 to heat a fluid to be heated (water). Here, the burner 3 is a back-combustion type that uses oil, gas, or the like as fuel and generates a downward flame.

４はバーナ３に燃焼用の空気を供給する送風機、５はバーナ３の下方に形成される燃焼室、６は燃焼室５内に設けられバーナ３の燃焼に伴い発生する燃焼ガスの熱を回収するフィンチューブ式の熱交換器である。 4 is a blower that supplies combustion air to the burner 3, 5 is a combustion chamber formed below the burner 3, and 6 is provided in the combustion chamber 5 to recover the heat of the combustion gas generated by the combustion of the burner 3. It is a fin tube type heat exchanger.

７は燃焼室５と連通しており、燃焼室５よりも燃焼ガスの流れ方向下流側に位置し、熱交換器６の下方に配置される排気集合室である。排気集合室７は左右方向に延在し、一方側で熱交換器６と接続され、他方側で燃焼ガス流通部材としての消音室８と接続される。 Reference numeral 7 denotes an exhaust collecting chamber which communicates with the combustion chamber 5, is located on the downstream side of the combustion chamber 5 in the flow direction of the combustion gas, and is arranged below the heat exchanger 6. The exhaust collecting chamber 7 extends in the left-right direction, is connected to the heat exchanger 6 on one side, and is connected to the muffling chamber 8 as a combustion gas flow member on the other side.

前記消音室８は、内部に吸音材を備え、バーナ３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、排気集合室７と連通し、排気集合室７よりも燃焼ガスの流れ方向下流側に位置し、排気集合室７の上方に配置される。消音室８は上下方向に延在し、その上部に燃焼ガスを排出する燃焼ガス通過口９を備えている。なお、本実施形態では、燃焼ガス流通部材として消音室８を配置させたが、消音室８の代わりに、燃焼ガス流通部材として燃焼ガスから潜熱を回収する潜熱熱交換器を配置させてもよいものである。 The sound deadening chamber 8 is provided with a sound absorbing material inside to reduce the noise of the combustion gas generated by the combustion of the burner 3, communicates with the exhaust collecting chamber 7, and flows the combustion gas more than the exhaust collecting chamber 7. It is located on the downstream side in the direction and is arranged above the exhaust collecting chamber 7. The muffling chamber 8 extends in the vertical direction, and is provided with a combustion gas passage port 9 for discharging combustion gas above the muffling chamber 8. In the present embodiment, the muffling chamber 8 is arranged as a combustion gas flow member, but instead of the muffling chamber 8, a latent heat exchanger that recovers latent heat from the combustion gas may be arranged as a combustion gas flow member. It is a thing.

１０はバーナ３で発生した燃焼ガスを外部に排出させる排気口１１を備えた排気トップで、排気トップ１０は、ルーバ体１２とカバー体１３とで構成される。ルーバ体１２は、消音室８の前壁に取り付けられ、燃焼ガス通過口９を覆うように燃焼ガス通過口９の前面側に位置し、排気口１１に向かう燃焼ガスの流れ方向を規制するものである。カバー体１３は燃焼ガスを給湯装置１の外部に排出させる排気口１１を有している。また、カバー体１３は消音室８の前壁に取り付けられ、ルーバ体１２を覆うようにルーバ体１２の前面側に位置する。なお、ルーバ体１２およびカバー体１３は、消音室８の前壁に対して、ネジ止めや溶接等の適宜の方法で取り付けられている。 Reference numeral 10 denotes an exhaust top provided with an exhaust port 11 for discharging the combustion gas generated by the burner 3 to the outside. The exhaust top 10 is composed of a louver body 12 and a cover body 13. The louver body 12 is attached to the front wall of the muffling chamber 8 and is located on the front side of the combustion gas passage port 9 so as to cover the combustion gas passage port 9, and regulates the flow direction of the combustion gas toward the exhaust port 11. Is. The cover body 13 has an exhaust port 11 for discharging the combustion gas to the outside of the hot water supply device 1. Further, the cover body 13 is attached to the front wall of the sound deadening chamber 8 and is located on the front side of the louver body 12 so as to cover the louver body 12. The louver body 12 and the cover body 13 are attached to the front wall of the sound deadening chamber 8 by an appropriate method such as screwing or welding.

１４は給水管、１５は給湯装置１の機具外の給湯栓（図示せず）まで温水を供給する給湯管である。 Reference numeral 14 denotes a water supply pipe, and reference numeral 15 denotes a hot water supply pipe that supplies hot water to a hot water tap (not shown) outside the equipment of the hot water supply device 1.

前記給水管１４からの給水は、熱交換器６に導入され、熱交換器６にてバーナ３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１５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。 The water supplied from the water supply pipe 14 is introduced into the heat exchanger 6, is heated by heat exchange with the high-temperature combustion gas generated by the combustion of the burner 3 in the heat exchanger 6, and is heated from the hot water tap via the hot water supply pipe 15. Hot water is discharged at the hot water supply temperature set by the user.

前記バーナ３の燃焼に伴い発生した燃焼ガスは、送風機４の送風力により、燃焼室５を下向きに流れ、熱交換器６を通過する。そして、熱交換器６を下向きに通過した燃焼ガスは、排気集合室７にて下向きから上向きにＵターンされ、消音室８に上向きに流入し、消音室８を通過して排気トップ１０を介して排気口１１から機具外に排出される。 The combustion gas generated by the combustion of the burner 3 flows downward through the combustion chamber 5 due to the wind force of the blower 4, and passes through the heat exchanger 6. Then, the combustion gas that has passed downward through the heat exchanger 6 is U-turned from downward to upward in the exhaust collecting chamber 7, flows upward into the muffling chamber 8, passes through the muffling chamber 8, and passes through the exhaust top 10. It is discharged to the outside of the equipment from the exhaust port 11.

次に、ルーバ体１２の詳細について、図５〜図７を参照して説明する。
ルーバ体１２は、ルーバ体１２の外郭をなす外枠部１６を有している。当該外枠部１６は、上枠１６ａと下枠１６ｂと左枠１６ｃと右枠１６ｄとで構成されている。 Next, the details of the louver body 12 will be described with reference to FIGS. 5 to 7.
The louver body 12 has an outer frame portion 16 forming an outer shell of the louver body 12. The outer frame portion 16 is composed of an upper frame 16a, a lower frame 16b, a left frame 16c, and a right frame 16d.

前記ルーバ体１２は、外枠部１６の内方であって、鉛直方向（上下方向）に互いに間隔を介して並べられた複数の長板状の羽根部１７を有している。当該羽根部１７は、前方側に位置するカバー体１３の排気口１１に向かって上り傾斜をなしており、燃焼ガスを外方に対して斜め上方に向けて吹き出させて排出させるようにしている。さらに、羽根部１７は、長辺をなす両端縁が対向するように同一面に向かって折り返されて形成される一対の折り返し部１８を有し、折り返し部１８のある面が排気口１１側を向いており、図６に示されているように、ルーバ体１２を正面視したときに、羽根部１７における一対の折り返し部１８が見えるものである。 The louver body 12 has a plurality of long plate-shaped blade portions 17 which are inside the outer frame portion 16 and are arranged in the vertical direction (vertical direction) with a gap from each other. The blade portion 17 is inclined upward toward the exhaust port 11 of the cover body 13 located on the front side, and the combustion gas is blown out obliquely upward with respect to the outside so as to be discharged. .. Further, the blade portion 17 has a pair of folded portions 18 formed by being folded toward the same surface so that both end edges forming the long sides face each other, and the surface having the folded portions 18 is on the exhaust port 11 side. It faces, and as shown in FIG. 6, when the louver body 12 is viewed from the front, a pair of folded portions 18 in the blade portions 17 can be seen.

前記ルーバ体１２は、ルーバ体１２を、ルーバ体１２の厚み方向（前後方向）に貫いて形成され、複数の羽根部１７の相互間に位置し、燃焼ガスが通過する開口部１９を有している。開口部１９は、羽根部１７の配列方向（上下方向）と同方向に複数形成される。 The louver body 12 is formed by penetrating the louver body 12 in the thickness direction (front-rear direction) of the louver body 12, is located between the plurality of blade portions 17, and has an opening 19 through which combustion gas passes. ing. A plurality of openings 19 are formed in the same direction as the arrangement direction (vertical direction) of the blade portions 17.

前記ルーバ体１２は、外枠部１６と羽根部１７との間を連結する連結部２０を有している。連結部２０は、一端側が外枠部１６（左枠１６ｃまたは右枠１６ｄ）に連結され、他端側が羽根部１７に連結されており、連結部２０はそれぞれの羽根部１７に対し、羽根部１７の両側に対をなすように設けられている。また、本実施形態では、連結部２０と外枠部１６（左枠１６ｃまたは右枠１６ｄ）との境界部分を外枠境界部ＳＬ（図１０参照。）と称し、連結部２０と羽根部１７との境界部分を羽根境界部ＨＬ（図１０参照。）と称するものとし、連結部２０は、外枠境界部ＳＬと羽根境界部ＨＬとの間において折り曲げ部２１を有しているものである。 The louver body 12 has a connecting portion 20 that connects the outer frame portion 16 and the blade portion 17. One end of the connecting portion 20 is connected to the outer frame portion 16 (left frame 16c or right frame 16d), and the other end side is connected to the blade portion 17, and the connecting portion 20 is connected to the blade portion 17 with respect to each blade portion 17. It is provided so as to form a pair on both sides of 17. Further, in the present embodiment, the boundary portion between the connecting portion 20 and the outer frame portion 16 (left frame 16c or right frame 16d) is referred to as an outer frame boundary portion SL (see FIG. 10), and the connecting portion 20 and the blade portion 17 are referred to. The boundary portion with and is referred to as a blade boundary portion HL (see FIG. 10), and the connecting portion 20 has a bent portion 21 between the outer frame boundary portion SL and the blade boundary portion HL. ..

上記した外枠部１６と、羽根部１７と、連結部２０とは、溶接による接合や締結部材による結合がなされることなく、同一の材料（ここでは、同一の金属板）によって一体に形成されている。 The outer frame portion 16, the blade portion 17, and the connecting portion 20 are integrally formed of the same material (here, the same metal plate) without being joined by welding or joining by a fastening member. ing.

次に、給湯装置１の製造方法であって、ルーバ体１２の製造工程について、図８〜図１１も参照して説明する。なお、図８では、部材が存在する部分と部材が存在しない部分とを明確にするため、部材が存在している部分に二点鎖線の斜線によるハッチングを施している。すなわち、図８において、外枠部１６と羽根部１７と連結部２０とには上記ハッチングが施されている。 Next, the manufacturing process of the louver body 12, which is a manufacturing method of the hot water supply device 1, will be described with reference to FIGS. 8 to 11. In FIG. 8, in order to clarify the portion where the member exists and the portion where the member does not exist, the portion where the member exists is hatched by an oblique line of a two-dot chain line. That is, in FIG. 8, the outer frame portion 16, the blade portion 17, and the connecting portion 20 are hatched.

前記ルーバ体１２の製造工程としては、打ち抜き工程と、折り返し工程と、曲げ工程とを含んでおり、打ち抜き工程は、図８に示すように、ルーバ体１２の母材となる平板状の板部材としての金属板を打ち抜くことで、外枠部１６と、羽根部１７と、開口部１９と、連結部２０とを一体に形成する工程である。打ち抜き工程の実行後、折り返し工程が実行される。 The manufacturing process of the louver body 12 includes a punching step, a folding step, and a bending step. As shown in FIG. 8, the punching step is a flat plate member serving as a base material of the louver body 12. This is a step of integrally forming the outer frame portion 16, the blade portion 17, the opening portion 19, and the connecting portion 20 by punching out the metal plate. After executing the punching process, the folding process is executed.

図９では、各箇所の折り返しまたは折り曲げが行われる前の平板状のルーバ体１２が示され、折り返しとなる部分または折り曲げる部分を破線で表しており、図の見やすさを考慮して、折り返し部分ＯＬまたは折り曲げ部分ＭＬ以外の他の符号は省略している。 In FIG. 9, the flat plate-shaped louver body 12 before the folding or bending of each portion is shown, and the folded portion or the folded portion is represented by a broken line. Reference numerals other than OL or bent portion ML are omitted.

前記折り返し工程は、各々の羽根部１７の長辺をなす両端縁を１８０°折り返す工程と、最上方に形成された開口部１９と隣り合う上枠１６ａの下端縁を１８０°折り返す工程と、最下方に形成された開口部１９と隣り合う下枠１６ｂの上端縁を１８０°折り返す工程を含む。 The folding step includes a step of folding both end edges forming the long side of each blade portion 17 by 180 °, and a step of folding the lower end edge of the upper frame 16a adjacent to the opening 19 formed at the uppermost side by 180 °. The step of folding back the upper end edge of the lower frame 16b adjacent to the opening 19 formed below by 180 ° is included.

羽根部１７の折り返し工程において、全ての羽根部１７は、羽根部１７の長辺をなす両端縁が折り返されるものであるが、説明や図を簡単化するため、羽根部１７の折り返し工程を、ある１つの羽根部１７近傍を拡大した図１０に基づいて説明する。 In the folding process of the blades 17, all the blades 17 have both edges that form the long sides of the blades 17 folded back. However, in order to simplify the explanation and the drawing, the folding process of the blades 17 is performed. This will be described with reference to FIG. 10 in which the vicinity of one blade portion 17 is enlarged.

前記打ち抜き工程実行後の平板状のルーバ体１２において、羽根部１７の折り返し工程では、羽根部１７の長辺をなす上端縁および下端縁は、折り返し部分ＯＬで、両端縁が対向するように同一面（排気口１１が存在する燃焼ガスの流れ方向下流側の面）側に向かうように１８０°折り返されるものである。また、図面に基づく説明は省略するが、前記上枠１６ａの下端縁および前記下枠１６ｂの上端縁も折り返し工程が実行され、前記上枠１６ａの下端縁および前記下枠１６ｂの上端縁はそれぞれ、排気口１１が存在する燃焼ガスの流れ方向下流側に向かうように１８０°折り返されるものである。折り返し工程の実行後は、曲げ工程が実行される。 In the flat plate-shaped louver body 12 after the punching step is executed, in the folding step of the blade portion 17, the upper end edge and the lower end edge forming the long side of the blade portion 17 are the same at the folded portion OL so that both end edges face each other. It is folded back 180 ° toward the surface (the surface on the downstream side in the flow direction of the combustion gas in which the exhaust port 11 is present). Further, although description based on the drawings is omitted, the lower end edge of the upper frame 16a and the upper end edge of the lower frame 16b are also subjected to the folding step, and the lower end edge of the upper frame 16a and the upper end edge of the lower frame 16b are respectively. , The exhaust port 11 is folded back 180 ° toward the downstream side in the flow direction of the combustion gas where the exhaust port 11 is present. After the folding step is executed, the bending step is executed.

前記曲げ工程は、連結部２０に設けられた折り曲げ部２１を支点にして折り曲げて、長辺をなす両端縁が折り返された状態の羽根部１７が、排気口１１に向かって上り傾斜をなすようにする曲げ工程と、外枠部１６（上枠１６ａ、下枠１６ｂ、左枠１６ｃ、右枠１６ｄ）を折り曲げる曲げ工程とを含む。 In the bending step, the blade portion 17 is bent with the bent portion 21 provided on the connecting portion 20 as a fulcrum, and the blade portions 17 in a state where both end edges forming the long sides are folded back are inclined upward toward the exhaust port 11. The bending step of bending the outer frame portion 16 (upper frame 16a, lower frame 16b, left frame 16c, right frame 16d) is included.

連結部２０の折り曲げ部２１での曲げ工程において、全ての羽根部１７は、排気口１１に向かって上り傾斜をなすようになるが、説明や図を簡単化するため、連結部２０の折り曲げ部２１での曲げ工程を、ある１つの羽根部１７近傍を拡大した図１１に基づいて説明する。 In the bending process at the bending portion 21 of the connecting portion 20, all the blade portions 17 are inclined upward toward the exhaust port 11, but for the sake of simplification of explanation and drawing, the bending portion of the connecting portion 20 is formed. The bending step in No. 21 will be described with reference to FIG. 11 in which the vicinity of one blade portion 17 is enlarged.

前記折り返し工程実行後のルーバ体１２において、連結部２０の折り曲げ部２１での曲げ工程では、連結部２０と外枠部１６（左枠１６ｃまたは右枠１６ｄ）との境界部分である外枠境界部ＳＬと、連結部２０と羽根部１７との境界部分である羽根境界部ＨＬとの間に設けられた折り曲げ部２１を支点にして、連結部２０を燃焼ガスの流れ方向上流側（排気口１１が存在する方向と逆側）に向けて折り曲げ、羽根部１７全体が、排気口１１に向かって上り傾斜をなすようにし、且つ折り返し部１８のある面が排気口１１側を向くようにするものである。 In the louver body 12 after executing the folding step, in the bending step at the bending portion 21 of the connecting portion 20, the outer frame boundary which is the boundary portion between the connecting portion 20 and the outer frame portion 16 (left frame 16c or right frame 16d). With the bent portion 21 provided between the portion SL and the blade boundary portion HL, which is the boundary portion between the connecting portion 20 and the blade portion 17, as a fulcrum, the connecting portion 20 is on the upstream side (exhaust port) in the flow direction of the combustion gas. Bend toward the direction in which 11 is present) so that the entire blade portion 17 is inclined upward toward the exhaust port 11 and the surface with the folded portion 18 faces the exhaust port 11 side. It is a thing.

ここで、図１２を用いて、羽根部１７に対する燃焼ガスの流れについて説明する。
図１２（ａ）は本実施形態の羽根部１７の拡大断面図（図１１のＢ−Ｂ断面図）を示すものであり、図１２（ｂ）は比較例の羽根部１７０の拡大断面図を示すものである。 Here, the flow of the combustion gas with respect to the blade portion 17 will be described with reference to FIG.
FIG. 12A shows an enlarged cross-sectional view of the blade portion 17 of the present embodiment (cross-sectional view taken along the line BB of FIG. 11), and FIG. 12B shows an enlarged cross-sectional view of the blade portion 170 of the comparative example. It shows.

図１２（ａ）に示す本実施形態では、燃焼ガスの流れ方向（前後方向）において、燃焼ガスの流れ方向最上流側の羽根部１７の端部Ｒとなる位置が、折り返し部１８のちょうど折り返し部分であり、その部分が曲面となっていると共に、燃焼ガスの流れ方向最下流側の羽根部１７の端部Ｒとなる位置も、折り返し部１８のちょうど折り返し部分であり、その部分が曲面となっているのに対して、図１２（ｂ）に示す比較例の平板状の羽根部１７０では、燃焼ガスの流れ方向最上流側の羽根部１７０の端部となる位置が、角張った角面となっていると共に、燃焼ガスの流れ方向最下流側の羽根部１７０の端部となる位置も、角張った角面となっている。 In the present embodiment shown in FIG. 12A, the position of the end portion R of the blade portion 17 on the most upstream side of the combustion gas flow direction in the combustion gas flow direction (front-rear direction) is exactly folded back of the folded-back portion 18. It is a part, and that part is a curved surface, and the position where the end portion R of the blade portion 17 on the most downstream side in the flow direction of the combustion gas is also the just folded portion of the folded portion 18, and that portion is a curved surface. On the other hand, in the flat plate-shaped blade portion 170 of the comparative example shown in FIG. 12B, the position of the end portion of the blade portion 170 on the most upstream side in the flow direction of the combustion gas is an angular surface. At the same time, the position of the end of the blade portion 170 on the most downstream side in the flow direction of the combustion gas is also an angular surface.

そうすると、比較例においては、燃焼ガスが羽根部１７０を通過する際、図中の破線の丸で囲まれた羽根部１７０の端部で大きな風切り音が発生してしまうが、本実施形態では、羽根部１７の端部Ｒが曲面となっているため、燃焼ガスが羽根部１７を通過する際、燃焼ガスが羽根部１７の端部Ｒに当たっても風切り音を発生させるようなことがなく、羽根部１７での風切り音がほとんど生じず、燃焼ガスの吹き出しに伴う騒音が極めて少なくなる。さらに、本実施形態では、羽根部１７において、折り返し部１８のある面が排気口１１側を向くようになっている。燃焼ガスの流れる方向を考えた場合、羽根部１７において、折り返し部１８のある面と逆側の面には燃焼ガスは当たるが、折り返し部１８のある面には燃焼ガスは当たりにくくなっているため、折り返し部１８の角張った端縁に燃焼ガスが当たりにくく、風切り音の発生を抑制することができ、燃焼ガスの吹き出しに伴う騒音が極めて少なくなるものである。 Then, in the comparative example, when the combustion gas passes through the blade portion 170, a loud wind noise is generated at the end of the blade portion 170 circled by the broken line in the figure. However, in the present embodiment, the wind noise is generated. Since the end portion R of the blade portion 17 is curved, when the combustion gas passes through the blade portion 17, even if the combustion gas hits the end portion R of the blade portion 17, no wind noise is generated and the blades. Almost no wind noise is generated in the portion 17, and the noise associated with the blowing out of the combustion gas is extremely reduced. Further, in the present embodiment, in the blade portion 17, the surface of the folded portion 18 faces the exhaust port 11 side. When considering the flow direction of the combustion gas, the combustion gas hits the surface of the blade portion 17 opposite to the surface of the folded portion 18, but the combustion gas is hard to hit the surface of the folded portion 18. Therefore, it is difficult for the combustion gas to hit the angular end edge of the folded-back portion 18, the generation of wind noise can be suppressed, and the noise associated with the blowing out of the combustion gas is extremely reduced.

なお、外枠部１６（上枠１６ａ、下枠１６ｂ、左枠１６ｃ、右枠１６ｄ）を折り曲げる曲げ工程については、図面による説明は省略するが、上枠１６ａの曲げ工程は、図９に示した上枠１６ａと左枠１６ｃとの境界部分の折り曲げ部分ＭＬ、および上枠１６ａと右枠１６ｄとの境界部分の折り曲げ部分ＭＬを、山折りで直角に折り曲げ、図９に示した上枠１６ａの中間位置の折り曲げ部分ＭＬを谷折りで直角に折り曲げるものである。また、下枠１６ｂの曲げ工程は、図９に示した下枠１６ｂと左枠１６ｃとの境界部分の折り曲げ部分ＭＬ、および下枠１６ｂと右枠１６ｄとの境界部分の折り曲げ部分ＭＬを、山折りで直角に折り曲げ、図９に示した下枠１６ｂの中間位置の折り曲げ部分ＭＬを谷折りで直角に折り曲げるものである。左枠１６ｃの曲げ工程は、図９に示した左枠１６ｃと連結部２０の境界部分、すなわち外枠境界部ＳＬを折り曲げ部分ＭＬとして、折り曲げ部分ＭＬを、山折りで直角までいかない程度で鋭角に折り曲げるものである。右枠１６ｄの曲げ工程は、図９に示した右枠１６ｄと連結部２０の境界部分、すなわち外枠境界部ＳＬを折り曲げ部分ＭＬとして、折り曲げ部分ＭＬを、山折りで直角までいかない程度で鋭角に折り曲げるものである。先に説明してきた打ち抜き工程、折返し工程、曲げ工程を経ることで、ルーバ体１２の母材となる平板状の板部材から、図５、図６に示したルーバ体１２が完成する。 The bending step of bending the outer frame portion 16 (upper frame 16a, lower frame 16b, left frame 16c, right frame 16d) will not be described in the drawings, but the bending step of the upper frame 16a is shown in FIG. The bent portion ML of the boundary portion between the upper frame 16a and the left frame 16c and the bent portion ML of the boundary portion between the upper frame 16a and the right frame 16d are bent at right angles by mountain folds, and the upper frame 16a shown in FIG. The bent portion ML at the intermediate position of the above is bent at a right angle by a valley fold. Further, in the bending step of the lower frame 16b, the bent portion ML of the boundary portion between the lower frame 16b and the left frame 16c and the bent portion ML of the boundary portion between the lower frame 16b and the right frame 16d shown in FIG. It is bent at a right angle by folding, and the bent portion ML at the intermediate position of the lower frame 16b shown in FIG. 9 is bent at a right angle by a valley fold. In the bending step of the left frame 16c, the boundary portion between the left frame 16c and the connecting portion 20 shown in FIG. 9, that is, the outer frame boundary portion SL is used as the bending portion ML, and the bending portion ML is not bent to a right angle by mountain fold. It bends at an acute angle. In the bending step of the right frame 16d, the boundary portion between the right frame 16d and the connecting portion 20 shown in FIG. 9, that is, the outer frame boundary portion SL is used as the bending portion ML, and the bending portion ML is not bent to a right angle by mountain folding. It bends at an acute angle. The louver body 12 shown in FIGS. 5 and 6 is completed from the flat plate member serving as the base material of the louver body 12 through the punching step, the folding step, and the bending step described above.

以上説明した実施形態によれば、筐体２内に収容され被加熱流体を加熱するバーナ３と、バーナ３で発生した燃焼ガスを外部に排出させる排気口１１と、を備えた給湯装置１において、排気口１１に向かう燃焼ガスの流れ方向を規制するルーバ体１２を設けている。なお、ルーバ体１２は、ルーバ体１２の外郭をなす外枠部１６と、外枠部１６の内方であって鉛直方向に互いに間隔を介して並べられた複数の長板状の羽根部１７と、ルーバ体１２を、ルーバ体１２の厚み方向に貫いて形成され、複数の長板状の羽根部１７の相互間に位置し、燃焼ガスが通過する開口部１９と、外枠部１６と羽根部１７との間を連結する連結部２０と、を有している。外枠部１６と羽根部１７と連結部２０とは一体に形成され、羽根部１７は、長辺をなす両端縁が対向するよう同一面に向かって折り返されて形成される一対の折り返し部１８を有し、羽根部１７は、排気口１１に向かって上り傾斜をなし、折り返し部１８のある面が排気口１１側を向いているものである。 According to the embodiment described above, the hot water supply device 1 includes a burner 3 housed in the housing 2 to heat the fluid to be heated, and an exhaust port 11 for discharging the combustion gas generated in the burner 3 to the outside. A louver body 12 that regulates the flow direction of the combustion gas toward the exhaust port 11 is provided. The louver body 12 includes an outer frame portion 16 that forms an outer shell of the louver body 12, and a plurality of long plate-shaped blade portions 17 that are inside the outer frame portion 16 and are arranged vertically with respect to each other. An opening 19 formed by penetrating the louver body 12 in the thickness direction of the louver body 12 and located between a plurality of elongated blades 17 through which combustion gas passes, and an outer frame portion 16. It has a connecting portion 20 that connects the blade portion 17 and the blade portion 17. The outer frame portion 16, the blade portion 17, and the connecting portion 20 are integrally formed, and the blade portion 17 is formed by folding back toward the same surface so that both end edges forming long sides face each other. The blade portion 17 has an upward inclination toward the exhaust port 11, and the surface of the folded-back portion 18 faces the exhaust port 11.

また、給湯装置１の製造方法であって、給湯装置１に備えられ、燃焼ガスを外部に排出させる排気口１１に向かう燃焼ガスの流れ方向を規制するルーバ体１２の製造工程において、ルーバ体１２の外郭をなす外枠部１６と、外枠部１６の内方に設けられた複数の長板状の羽根部１７と、ルーバ体１２の厚み方向に貫いて形成され複数の長板状の羽根部１７の相互間に位置する開口部１９と、外枠部１６と羽根部１７との間を連結する連結部２０と、を平板状の板部材を打ち抜いて一体に形成する打ち抜き工程と、羽根部１７の長辺をなす両端縁が対向するよう同一面に向かって折り返して一対の折り返し部１８を形成する折り返し工程と、連結部２０と外枠部１６との境界部分である外枠境界部ＳＬと、連結部２０と羽根部１７との境界部分である羽根境界部ＨＬとの間に設けられた折り曲げ部２１を支点にして、羽根部１７全体が、排気口１１に向かって上り傾斜をなすようにし、且つ一対の折り返し部１８のある面が排気口１１側を向くように連結部２０を折り曲げる曲げ工程と、を備えているものである。 Further, in the manufacturing process of the louver body 12 which is provided in the hot water supply device 1 and regulates the flow direction of the combustion gas toward the exhaust port 11 for discharging the combustion gas to the outside, the louver body 12 is manufactured. A plurality of long plate-shaped blades 17 provided inside the outer frame portion 16 and a plurality of long plate-shaped blades 17 formed through the louver body 12 in the thickness direction. A punching process in which an opening 19 located between the portions 17 and a connecting portion 20 connecting the outer frame portion 16 and the blade portion 17 are integrally formed by punching a flat plate member, and a blade. A folding step of folding back toward the same surface so that both end edges forming the long sides of the portion 17 face each other to form a pair of folded portions 18, and an outer frame boundary portion which is a boundary portion between the connecting portion 20 and the outer frame portion 16. With the bent portion 21 provided between the SL and the blade boundary portion HL, which is the boundary portion between the connecting portion 20 and the blade portion 17, as a fulcrum, the entire blade portion 17 inclines upward toward the exhaust port 11. It is provided with a bending step of bending the connecting portion 20 so that the surface of the pair of folded portions 18 faces the exhaust port 11 side.

これらによれば、ルーバ体１２を構成する外枠部１６と羽根部１７と連結部２０とは、溶接による接合や締結部材による結合がなされることなく、同一の材料（ここでは、金属板）によって一体に形成されている。つまり、ルーバ体１２は別部材を組み合わせて構成する必要がなく、一体で形成されるため、部品点数および組み付け工数の増加を抑制することができ、製造コストの増大を抑制できると共に、部材同士の組み付けがなくガタツキが生じるおそれがないものである。 According to these, the outer frame portion 16, the blade portion 17, and the connecting portion 20 constituting the louver body 12 are made of the same material (here, a metal plate) without being joined by welding or being joined by a fastening member. Is formed integrally by. That is, since the louver body 12 does not need to be formed by combining separate members and is integrally formed, it is possible to suppress an increase in the number of parts and assembly man-hours, suppress an increase in manufacturing cost, and the members are formed together. There is no assembly and there is no risk of rattling.

また、羽根部１７は、羽根部１７の長辺をなす両端縁が対向するよう同一面に向かって折り返されて一対の折り返し部１８が形成され、長辺をなす両端縁が折り返された状態の羽根部１７は、排気口１１に向かって上り傾斜をなし、折り返し部１８のある面が排気口１１側を向いている。そうすると、燃焼ガスの流れ方向（前後方向）において、燃焼ガスの流れ方向最上流側の羽根部１７の端部Ｒとなる位置、および燃焼ガスの流れ方向最下流側の羽根部１７の端部Ｒとなる位置が、折り返し部１８の折り返された部分であり、その部分が曲面となっており、燃焼ガスが羽根部１７を通過する際、燃焼ガスが羽根部１７の端部Ｒに当たっても風切り音を発生させるようなことがなく、羽根部１７での風切り音がほとんど生じず、燃焼ガスの吹き出しに伴う騒音を極めて少なくすることができるものである。さらに、羽根部１７において、折り返し部１８のある面が排気口１１側を向くようになっており、燃焼ガスの流れる方向を考えたときに、折り返し部１８のある面には燃焼ガスは当たりにくくなっているため、折り返し部１８の先端の角張った端縁に燃焼ガスが当たりにくく、風切り音の発生を抑制することができ、燃焼ガスの吹き出しに伴う騒音を極めて少なくすることができるものである。 Further, the blade portion 17 is folded toward the same surface so that both end edges forming the long side of the blade portion 17 face each other to form a pair of folded portions 18, and both end edges forming the long side are folded back. The blade portion 17 is inclined upward toward the exhaust port 11, and the surface having the folded-back portion 18 faces the exhaust port 11 side. Then, in the combustion gas flow direction (front-rear direction), the position that becomes the end portion R of the blade portion 17 on the most upstream side in the combustion gas flow direction and the end portion R of the blade portion 17 on the most downstream side in the combustion gas flow direction. The position is the folded portion of the folded portion 18, and that portion has a curved surface. When the combustion gas passes through the blade portion 17, even if the combustion gas hits the end portion R of the blade portion 17, a wind noise is heard. The wind noise at the blade portion 17 is hardly generated, and the noise caused by the blowing out of the combustion gas can be extremely reduced. Further, in the blade portion 17, the surface with the folded-back portion 18 faces the exhaust port 11 side, and when considering the direction in which the combustion gas flows, it is difficult for the combustion gas to hit the surface with the folded-back portion 18. Therefore, it is difficult for the combustion gas to hit the angular edge of the tip of the folded-back portion 18, the generation of wind noise can be suppressed, and the noise associated with the blowout of the combustion gas can be extremely reduced. ..

なお、本発明は一実施形態に限定されるものではなく、本実施形態では、バーナ３で発生した燃焼ガスを外部に排出させる排気口１１を備えた燃焼装置としての給湯装置１に本発明を適用したが、バーナ３で発生した燃焼ガスを外部に排出させる排気口１１を備えた燃焼装置としての暖房装置に本発明を適用してもよいものであり、その趣旨を逸脱しない範囲内において、種々の変更が加えられて実施されるものである。 The present invention is not limited to one embodiment. In the present embodiment, the present invention is applied to a hot water supply device 1 as a combustion device provided with an exhaust port 11 for discharging the combustion gas generated by the burner 3 to the outside. However, the present invention may be applied to a heating device as a combustion device provided with an exhaust port 11 for discharging the combustion gas generated by the burner 3 to the outside, and the present invention may be applied to the heating device as long as the purpose is not deviated. It is implemented with various changes.

１ 給湯装置
２ 筐体
３ バーナ
１１ 排気口
１２ ルーバ体
１６ 外枠部
１７ 羽根部
１８ 一対の折り返し部
１９ 開口部
２０ 連結部
２１ 折り曲げ部 1 Water heater 2 Housing 3 Burner 11 Exhaust port 12 Louver body 16 Outer frame 17 Blade 18 Pair of folded parts 19 Opening 20 Connecting part 21 Bending part

Claims (2)

筐体内に収容され被加熱流体を加熱する燃焼器と、前記燃焼器で発生した燃焼ガスを外部に排出させる排気口と、を備えた燃焼装置において、
前記排気口に向かう前記燃焼ガスの流れ方向を規制するルーバ体を設け、
前記ルーバ体は、
前記ルーバ体の外郭をなす外枠部と、
前記外枠部の内方であって、互いに間隔を介して並べられた複数の長板状の羽根部と、
前記ルーバ体を、前記ルーバ体の厚み方向に貫いて形成され、複数の長板状の羽根部の相互間に位置し、前記燃焼ガスが通過する開口部と、
前記外枠部と前記羽根部との間を連結する連結部と、を有し、
前記外枠部と前記羽根部と前記連結部とは一体に形成され、
前記羽根部は、長辺をなす両端縁が対向するよう同一面に向かって折り返されて形成される一対の折り返し部を有し、
前記羽根部は、前記排気口に向かって上り傾斜をなし、且つ前記折り返し部のある面が前記排気口側を向いていることを特徴とする燃焼装置。 In a combustor device provided with a combustor housed in a housing for heating a fluid to be heated and an exhaust port for discharging the combustion gas generated by the combustor to the outside.
A louver body that regulates the flow direction of the combustion gas toward the exhaust port is provided.
The louver body
The outer frame portion that forms the outer shell of the louver body and
A plurality of long plate-shaped blades that are inside the outer frame and are arranged at intervals from each other.
An opening formed by penetrating the louver body in the thickness direction of the louver body, located between a plurality of elongated blades, and through which the combustion gas passes,
It has a connecting portion for connecting the outer frame portion and the blade portion, and has a connecting portion.
The outer frame portion, the blade portion, and the connecting portion are integrally formed.
The blade portion has a pair of folded portions formed by being folded toward the same surface so that both end edges forming long sides face each other.
The combustion device is characterized in that the blade portion is inclined upward toward the exhaust port, and the surface having the folded portion faces the exhaust port side. 燃焼装置の製造方法であって、
前記燃焼装置に備えられ、燃焼ガスを外部に排出させる排気口に向かう燃焼ガスの流れ方向を規制するルーバ体の製造工程において、
前記ルーバ体の外郭をなす外枠部と、前記外枠部の内方に設けられた複数の長板状の羽根部と、前記ルーバ体の厚み方向に貫いて形成され複数の長板状の羽根部の相互間に位置する開口部と、前記外枠部と前記羽根部との間を連結する連結部と、を平板状の板部材を打ち抜いて一体に形成する打ち抜き工程と、
前記羽根部の長辺をなす両端縁が対向するよう同一面に向かって折り返して一対の折り返し部を形成する折り返し工程と、
前記連結部と前記外枠部との境界部分である外枠境界部と、前記連結部と前記羽根部との境界部分である羽根境界部との間に設けられた折り曲げ部を支点にして折り曲げ、前記羽根部が、前記排気口に向かって上り傾斜をなすようにし、且つ前記折り返し部のある面が前記排気口側を向くように折り曲げる曲げ工程と、
を備えていることを特徴とする燃焼装置の製造方法。 It is a manufacturing method of a combustion device.
In the manufacturing process of a louver body provided in the combustion device and regulating the flow direction of the combustion gas toward the exhaust port for discharging the combustion gas to the outside.
An outer frame portion forming an outer shell of the louver body, a plurality of long plate-shaped blades provided inside the outer frame portion, and a plurality of long plate-shaped blades formed through the louver body in the thickness direction. A punching step of punching a flat plate member to integrally form an opening located between the blade portions and a connecting portion connecting the outer frame portion and the blade portion.
A folding step of forming a pair of folded portions by folding toward the same surface so that both end edges forming the long sides of the blade portion face each other.
Bending with a bent portion provided between the outer frame boundary portion, which is the boundary portion between the connecting portion and the outer frame portion, and the blade boundary portion, which is the boundary portion between the connecting portion and the blade portion, as a fulcrum. A bending step in which the blade portion is bent upward toward the exhaust port and the surface having the folded portion faces the exhaust port side.
A method of manufacturing a combustion device, which comprises.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152343U (en) * 1983-03-31 1984-10-12 三菱電機株式会社 blowout grill
JP2012073000A (en) * 2010-09-29 2012-04-12 Noritz Corp Hot water unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152343U (en) * 1983-03-31 1984-10-12 三菱電機株式会社 blowout grill
JP2012073000A (en) * 2010-09-29 2012-04-12 Noritz Corp Hot water unit

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