JP7502213B2 - Pipe joint, radiator, and fuel cell device - Google Patents

Pipe joint, radiator, and fuel cell device Download PDF

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JP7502213B2
JP7502213B2 JP2021017782A JP2021017782A JP7502213B2 JP 7502213 B2 JP7502213 B2 JP 7502213B2 JP 2021017782 A JP2021017782 A JP 2021017782A JP 2021017782 A JP2021017782 A JP 2021017782A JP 7502213 B2 JP7502213 B2 JP 7502213B2
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pipe
tip
joint
radiator
fuel cell
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JP2022120705A (en
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直生 大橋
英徳 中間
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Kyocera 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Description

本開示は、配管接合体、ラジエータ、及び燃料電池装置に関するものである。 This disclosure relates to a piping joint, a radiator, and a fuel cell device.

例えば、ラジエータのように、ファンにより冷却される流路に流体を通過させることにより内部流体を冷却する装置が知られている。このような装置において、流路は、伝熱性の観点から、銅を主成分とする材料により形成されることが一般的である。また、このような装置の製造では、複数の配管を連結することにより全体の流路が形成される。配管の連結には、多様な連結方法を採用し得るが、ろう付けによる連結が広く採用されている（特許文献１参照）。 For example, there is known a device that cools an internal fluid by passing the fluid through a flow path that is cooled by a fan, such as a radiator. In such devices, the flow path is generally made of a material whose main component is copper, from the viewpoint of heat transfer. In addition, in the manufacture of such devices, the entire flow path is formed by connecting multiple pipes. Various connection methods can be used to connect the pipes, but brazing is widely used (see Patent Document 1).

特開２０２０－１３９６２９号公報JP 2020-139629 A

ろう付けによる連結箇所からの流体の漏洩の可能性を低減することが求められていた。 There was a need to reduce the possibility of fluid leakage from brazed connections.

従って、上記のような従来技術の問題点に鑑みてなされた本開示の目的は、ろう付けによる連結箇所からの流体の漏洩の可能性を低減させる配管接合体、ラジエータ、及び燃料電池装置を提供することにある。 Therefore, the purpose of this disclosure, which has been made in consideration of the problems of the conventional technology described above, is to provide a pipe joint, a radiator, and a fuel cell device that reduce the possibility of fluid leakage from joints made by brazing.

上述した諸課題を解決すべく、第１の観点による配管接合体は、
銅を主成分とした材料から形成される第１の配管及び第２の配管と、
前記第１の配管に前記第２の配管の先端が挿入された状態で、前記第１の配管と前記第２の配管の先端とは離れており、前記第１の配管における前記第２の配管の挿入方向に対して反対側に位置する先端側から前記第２の配管の先端側に向かって延在し、前記第２の配管の先端よりも前記第１の配管の先端側において終端して前記第１の配管及び前記第２の配管に接合する接合部と、を備え、
前記第２の配管の先端位置における前記第１の配管の最大銅結晶粒度は、前記第１の配管の先端位置における最大銅結晶粒度より小さい。 In order to solve the above-mentioned problems, a pipe joint according to a first aspect of the present invention comprises:
A first pipe and a second pipe formed from a material mainly composed of copper;
a joint portion that is spaced apart from the first pipe when the tip of the second pipe is inserted into the first pipe, extends from a tip side of the first pipe that is opposite to the insertion direction of the second pipe toward the tip side of the second pipe, and terminates on the tip side of the first pipe relative to the tip of the second pipe to be joined to the first pipe and the second pipe ,
The maximum copper grain size of the first pipe at the tip of the second pipe is smaller than the maximum copper grain size at the tip of the first pipe.

第２の観点によるラジエータは、
銅を主成分とした材料から形成される第１の配管及び第２の配管と、前記第１の配管に前記第２の配管の先端が挿入された状態で、前記第１の配管と前記第２の配管の先端とは離れており、前記第１の配管における前記第２の配管の挿入方向に対して反対側に位置する先端側から前記第２の配管の先端側に向かって延在し、前記第２の配管の先端よりも前記第１の配管の先端側において終端して前記第１の配管及び前記第２の配管に接合する接合部と、を有し、前記第２の配管の先端位置における前記第１の配管の最大銅結晶粒度は、前記第１の配管の先端位置における最大銅結晶粒度より小さい配管接合体を備える。 A radiator according to a second aspect of the present invention comprises:
The pipe joint includes a first pipe and a second pipe formed from a material mainly composed of copper, and a joint portion that, when the tip of the second pipe is inserted into the first pipe, is spaced from the tip of the first pipe and extends from a tip side of the first pipe that is located on the opposite side of the insertion direction of the second pipe toward the tip side of the second pipe and terminates on the tip side of the first pipe relative to the tip of the second pipe to be joined to the first pipe and the second pipe , and the maximum copper crystal grain size of the first pipe at the tip position of the second pipe is smaller than the maximum copper crystal grain size at the tip position of the first pipe.

第３の観点による燃料電池装置は、
銅を主成分とした材料から形成される第１の配管及び第２の配管と、前記第１の配管に前記第２の配管の先端が挿入された状態で、前記第１の配管と前記第２の配管の先端とは離れており、前記第１の配管における前記第２の配管の挿入方向に対して反対側に位置する先端側から前記第２の配管の先端側に向かって延在し、前記第２の配管の先端よりも前記第１の配管の先端側において終端して前記第１の配管及び前記第２の配管に接合する接合部と、を含み、前記第２の配管の先端位置における前記第１の配管の最大銅結晶粒度は、前記第１の配管の先端位置における最大銅結晶粒度より小さい配管接合体を有するラジエータを備える。 A fuel cell device according to a third aspect comprises:
The radiator includes a first pipe and a second pipe formed from a material mainly composed of copper, and a pipe joint including : a first pipe and a second pipe formed from a material mainly composed of copper; and a joint portion, which, when a tip of the second pipe is inserted into the first pipe, is spaced from the tip of the first pipe and extends from a tip side of the first pipe that is located on the opposite side of the insertion direction of the second pipe toward the tip side of the second pipe and terminates on the tip side of the first pipe relative to the tip of the second pipe to be joined to the first pipe and the second pipe, and wherein the maximum copper grain size of the first pipe at the tip position of the second pipe is smaller than the maximum copper grain size at the tip position of the first pipe.

上記のように構成された本開示に係る配管接合体、ラジエータ、及び燃料電池装置によれば、ろう付けによる連結箇所からの流体の漏洩の可能性が低減する。 The pipe joint, radiator, and fuel cell device according to the present disclosure configured as described above reduce the possibility of fluid leakage from the brazed connection points.

一実施形態に係る配管接合体の軸方向に沿った断面図である。1 is a cross-sectional view taken along an axial direction of a pipe joint body according to an embodiment of the present invention; 図１の配管接合体の製造における第１の配管への第２の配管の挿入工程を示す図である。2 is a diagram showing a step of inserting a second pipe into a first pipe in the manufacturing process of the pipe joint assembly of FIG. 1 . FIG. 図１の配管接合体の製造におけるろう材の配置工程を示す図である。2 is a diagram showing a brazing material arrangement step in the manufacture of the pipe joint assembly of FIG. 1; 図１の配管接合体の製造における加熱工程を示す図である。2A to 2C are diagrams illustrating a heating step in the manufacture of the pipe joint assembly of FIG. 1. 図１の配管接合体を適用したラジエータを含む燃料電池装置の機能ブロック図である。2 is a functional block diagram of a fuel cell device including a radiator to which the pipe assembly of FIG. 1 is applied. 接合体が第２の配管の先端を超えて終端する参考例の配管接合体の軸方向に沿った断面図である。FIG. 13 is a cross-sectional view along the axial direction of a reference example pipe joint in which the joint terminates beyond the tip of the second pipe. 図１の配管接合体の第１の変形例の軸方向に沿った断面図である。FIG. 2 is a cross-sectional view taken along an axial direction of a first modified example of the pipe joint body of FIG. 1 . 図１の配管接合体の第２の変形例の軸方向に沿った断面図である。FIG. 2 is a cross-sectional view taken along an axial direction of a second modified example of the pipe joint body of FIG. 1 .

以下、本開示を適用した配管接合体の実施形態について、図面を参照して説明する。 Below, an embodiment of a pipe joint to which the present disclosure is applied is described with reference to the drawings.

図１に示すように、本開示の一実施形態に係る配管接合体１０は、第１の配管１１及び第２の配管１２と、接合部１３とを含む。 As shown in FIG. 1, a pipe joint 10 according to one embodiment of the present disclosure includes a first pipe 11, a second pipe 12, and a joint portion 13.

第１の配管１１及び第２の配管１２は、銅を主成分とした材料から形成される。銅を主成分とした材料とは、配管としての機能を向上させるための、錫、鉄、ニッケル、アルミニウム、マンガン等の他の金属がその機能を発揮する量で銅に添加された材料を意味してよい。銅を主成分とした材料とは、配管を構成する材料のうち銅が最も多く含まれており、例えば銅が５９％以上含まれているものを意味してよい。 The first pipe 11 and the second pipe 12 are formed from a material whose main component is copper. A material whose main component is copper may mean a material in which other metals such as tin, iron, nickel, aluminum, manganese, etc. are added to copper in amounts that allow the metal to exhibit its function in order to improve the function of the pipe. A material whose main component is copper may mean a material in which copper is the most abundant of the materials constituting the pipe, for example, one that contains 59% or more copper.

第１の配管１１には、第２の配管１２の先端が挿入されている。第１の配管１１は、管状の本体１４の少なくとも一端に雌型嵌合部１５を有してよい。雌型嵌合部１５は、本体１４よりも内径が大きく、本体１４と同軸を有するように連結していてよい。雌型嵌合部１５は、挿入される第２の配管１２の先端と嵌合してよい。 The tip of the second pipe 12 is inserted into the first pipe 11. The first pipe 11 may have a female fitting 15 at at least one end of the tubular body 14. The female fitting 15 may have an inner diameter larger than that of the body 14 and may be connected to the body 14 so as to be coaxial. The female fitting 15 may fit with the tip of the second pipe 12 that is inserted.

雌型嵌合部１５の軸方向の長さは、挿入される第２の配管１２の先端として定められる長さと実質的に同じであってよい。雌型嵌合部１５の軸方向の長さは、後述するように、製造時に接合部１３が軸方向において第２の配管１２の先端よりも第１の配管１１の先端側において終端するように定められてよい。雌型嵌合部１５は、本体１４とは軸方向の反対側に、先端に向かうにつれて拡径する受部１６を有してよい。 The axial length of the female fitting 15 may be substantially the same as the length determined as the tip of the second pipe 12 to be inserted. As described below, the axial length of the female fitting 15 may be determined during manufacturing so that the joint 13 terminates axially closer to the tip of the first pipe 11 than the tip of the second pipe 12. The female fitting 15 may have a receiving portion 16 on the axial opposite side to the main body 14, the receiving portion 16 expanding in diameter toward the tip.

第２の配管１２は、第１の配管１１が雌型嵌合部１５を有する構成においては、本体１４と同径であってよい。第２の配管１２は、第１の配管１１が雌型嵌合部１５を有さず端まで均一な内径である構成においては、第１の配管１１の内径以下の外径であってよい。 In a configuration in which the first pipe 11 has a female fitting portion 15, the second pipe 12 may have the same diameter as the main body 14. In a configuration in which the first pipe 11 does not have a female fitting portion 15 and has a uniform inner diameter to the end, the second pipe 12 may have an outer diameter equal to or smaller than the inner diameter of the first pipe 11.

第１の配管１１において、第２の配管１２の第１の部分が接合された状態で、第２の配管１２の先端位置における第１の配管１１の最大銅結晶粒度が、第１の配管１１の先端位置における最大銅結晶粒度より小さい。結晶粒度の測定方法は、ＪＩＳ Ｈ０５０１の規定に準拠して行われればよい。例えば、第１の配管１１の先端位置と第２の配管１２の先端位置の任意の一か所を、顕微鏡により７５倍で見ることにより結晶粒度が測定比較される。または、画像処理ソフトウェアによって最大の銅結晶粒度が測定比較されてもよい。 In the first pipe 11, when the first portion of the second pipe 12 is joined, the maximum copper crystal grain size of the first pipe 11 at the tip position of the second pipe 12 is smaller than the maximum copper crystal grain size at the tip position of the first pipe 11. The method for measuring the crystal grain size may be performed in accordance with the provisions of JIS H0501. For example, the crystal grain size is measured and compared by viewing an arbitrary point at the tip position of the first pipe 11 and the tip position of the second pipe 12 with a microscope at 75 times magnification. Alternatively, the maximum copper crystal grain size may be measured and compared using image processing software.

接合部１３は、第１の配管１１に第２の配管１２の先端が挿入された状態で、第１の配管１１及び当該先端に接合する。接合部１３は、軸方向における第１の配管１１の先端及び第２の配管１２の先端の間の少なくとも一部で、径方向における第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの間に位置してよい。本明細書において、第１の配管１１の先端及び第２の配管１２の先端は、接合される側の端を意味してよい。 The joint 13 is joined to the first pipe 11 and the tip of the second pipe 12 when the tip of the second pipe 12 is inserted into the first pipe 11. The joint 13 may be located between the inner circumferential surface is of the first pipe 11 and the outer circumferential surface os of the second pipe 12 in the radial direction, at least in a portion between the tip of the first pipe 11 and the tip of the second pipe 12 in the axial direction. In this specification, the tip of the first pipe 11 and the tip of the second pipe 12 may mean the ends that are joined.

接合部１３は、第１の配管１１の先端側から第２の配管１２の先端側に向かって、軸方向に沿って、延在してよい。接合部１３は、軸方向において第２の配管１２の先端よりも第１の配管１１の先端側において終端してよい。接合部１３は、軸方向において、第１の配管１１の先端及び第２の配管１２の先端の中央位置よりも第１の配管の先端側に多く分布してよい。 The joint 13 may extend in the axial direction from the tip side of the first pipe 11 toward the tip side of the second pipe 12. The joint 13 may terminate in the axial direction closer to the tip side of the first pipe 11 than the tip of the second pipe 12. The joint 13 may be distributed more toward the tip side of the first pipe than the center position between the tip of the first pipe 11 and the tip of the second pipe 12 in the axial direction.

接合部１３は、加熱により第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの間に浸込んだろう材が、冷却により固化して形成されてよい。ろう材は、例えば、銅に５～８％のリンを混合したリン銅ろうであってよい。 The joint 13 may be formed by heating the brazing material soaked between the inner circumferential surface is of the first pipe 11 and the outer circumferential surface os of the second pipe 12, and then solidifying it by cooling. The brazing material may be, for example, phosphorus copper brazing material, which is copper mixed with 5 to 8% phosphorus.

本実施形態の配管接合体１０は、第２の配管１２側から第１の配管１１側に向かうように流体が流動するように配置されることが好ましい。 In this embodiment, the pipe joint 10 is preferably arranged so that the fluid flows from the second pipe 12 side toward the first pipe 11 side.

次に本実施形態の配管接合体１０の製造方法を、以下に説明する。 Next, the manufacturing method of the pipe joint 10 of this embodiment will be described below.

図２に示すように、第１の配管１１の雌型嵌合部１５内に、第２の配管１２が挿入される。雌型嵌合部１５が鉛直上方側に位置するように第１の配管１１を設置した状態で、鉛直上方から第２の配管１２が挿入されてよい。 As shown in FIG. 2, the second pipe 12 is inserted into the female fitting portion 15 of the first pipe 11. With the first pipe 11 installed so that the female fitting portion 15 is located vertically above, the second pipe 12 may be inserted from vertically above.

図３に示すように、第２の配管１２が第１の配管１１に挿入されている状態で、第１の配管１１の先端、例えば、受部１６に、ろう材１７が配置される。ろう材１７は、第１の配管１１の周方向における全域に配置されてよい。ろう材１７は、例えば、第２の配管１２に挿通されるリング状であってよい。 As shown in FIG. 3, when the second pipe 12 is inserted into the first pipe 11, the brazing material 17 is placed on the tip of the first pipe 11, for example, on the receiving portion 16. The brazing material 17 may be placed over the entire circumferential area of the first pipe 11. The brazing material 17 may be, for example, in the shape of a ring that is inserted into the second pipe 12.

図４に示すように、第１の配管１１の先端付近が、バーナ１８から噴出させる炎により加熱される。第１の配管１１の加熱により、ろう材１７が第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの間に浸込む。ろう材１７の浸込み後に全体を冷却することにより、ろう材１７を固化させて接合部１３が形成される。接合部１３の形成により第１の配管１１及び第２の配管１２が接合される。第１の配管１１及び第２の配管１２の接合により、配管接合体１０が製造される。 As shown in FIG. 4, the vicinity of the tip of the first pipe 11 is heated by a flame ejected from a burner 18. By heating the first pipe 11, the brazing material 17 penetrates between the inner peripheral surface is of the first pipe 11 and the outer peripheral surface os of the second pipe 12. By cooling the entire structure after the brazing material 17 penetrates, the brazing material 17 solidifies and a joint 13 is formed. The first pipe 11 and the second pipe 12 are joined by forming the joint 13. The pipe joint 10 is manufactured by joining the first pipe 11 and the second pipe 12.

前述のように、接合部１３が軸方向において第２の配管１２の先端よりも第１の配管１１の先端側において終端するように、第１の配管１１及び第２の配管１２の重なる部分である第１の部分の長さ、ろう材１７の量、加熱箇所、加熱時間、第１の配管１１及び第２の配管１２の間の隙間等が定められる。例えば、第１の部分を長くすることにより、ろう材１７の第２の配管１２の先端までの到達が抑制され得る。また、軸方向において第１の部分が占める範囲の中で第２の配管１２の先端側が過加熱されないように、加熱箇所及び加熱時間を調整することにより、ろう材１７の第２の配管１２の先端までの到達を抑制し得る。 As described above, the length of the first portion where the first pipe 11 and the second pipe 12 overlap, the amount of brazing material 17, the heating location, the heating time, the gap between the first pipe 11 and the second pipe 12, etc. are determined so that the joint 13 terminates axially closer to the tip of the first pipe 11 than the tip of the second pipe 12. For example, by lengthening the first portion, the brazing material 17 can be prevented from reaching the tip of the second pipe 12. In addition, by adjusting the heating location and heating time so that the tip side of the second pipe 12 is not overheated within the range occupied by the first portion in the axial direction, the brazing material 17 can be prevented from reaching the tip of the second pipe 12.

上述の配管接合体１０は、例えば、ラジエータ等に適用されてよい。ラジエータ２１は、水等の被冷却流体の流れる流路、及び流路に送風することにより流路内の被冷却流体を冷却するファンを含んでよい。流路は、ラジエータ２１における冷却領域に配置される複数の直線状の配管、及び冷却領域の外部に位置するＵ字状配管を含んでよい。流路は、直線状の配管をＵ字状配管で連結することにより全体で蛇行形状であってよい。直線状の配管及びＵ字状配管が、上述の配管接合体１０を構成していてよい。 The above-mentioned pipe joint 10 may be applied to, for example, a radiator. The radiator 21 may include a flow path through which a cooled fluid such as water flows, and a fan that cools the cooled fluid in the flow path by blowing air into the flow path. The flow path may include a plurality of straight pipes arranged in the cooling area of the radiator 21, and a U-shaped pipe located outside the cooling area. The flow path may have an overall serpentine shape by connecting straight pipes with U-shaped pipes. The straight pipes and U-shaped pipes may constitute the above-mentioned pipe joint 10.

本実施形態において、ラジエータ２１は、例えば、図５に示すように、燃料電池装置２０に用いられてよい。燃料電池装置２０は、燃料電池ユニット２２と、貯水ユニット２３を有してよい。 In this embodiment, the radiator 21 may be used in a fuel cell device 20, for example, as shown in FIG. 5. The fuel cell device 20 may have a fuel cell unit 22 and a water storage unit 23.

燃料電池ユニット２２は、補機部２４、発電部２５、電力変換部２６、排熱回収部２７、制御部２８、熱交換器２９、循環ポンプ３０、及びラジエータ２１を有する。図６において、実線矢印は、ガス、空気または水等の経路を示す。点線は、電力の経路を示す。一点鎖線は、通信線を示す。 The fuel cell unit 22 has an auxiliary section 24, a power generation section 25, a power conversion section 26, an exhaust heat recovery section 27, a control section 28, a heat exchanger 29, a circulation pump 30, and a radiator 21. In FIG. 6, solid arrows indicate paths for gas, air, water, etc. Dotted lines indicate paths for electricity. Dot-dash lines indicate communication lines.

補機部２４は、発電部２５を発電させるために必要な周辺機器であり、発電部２５に燃料を供給してよい。燃料は、例えば、所定割合で配合されたガス、空気、改質水等であってよい。 The auxiliary unit 24 is a peripheral device required for the power generation unit 25 to generate electricity, and may supply fuel to the power generation unit 25. The fuel may be, for example, gas, air, reformed water, etc., mixed in a predetermined ratio.

発電部２５は、補機部２４から供給される燃料によって電気化学反応を生起させ、直流電力を発電してよい。 The power generation unit 25 may generate DC power by inducing an electrochemical reaction using fuel supplied from the auxiliary unit 24.

電力変換部２６は、発電部２５から供給された直流電力を交流電力に変換してよい。変換された交流電力は需要家施設が備える電力負荷３１に供給されてよい。 The power conversion unit 26 may convert the DC power supplied from the power generation unit 25 into AC power. The converted AC power may be supplied to a power load 31 provided in the consumer facility.

排熱回収部２７は、発電部２５における発電より生じた排熱を回収してよい。排熱回収部２７は、回収した排ガスを熱交換器２９に供給してよい。 The exhaust heat recovery section 27 may recover exhaust heat generated by power generation in the power generation section 25. The exhaust heat recovery section 27 may supply the recovered exhaust gas to the heat exchanger 29.

制御部２８は、燃料電池装置２０全体を制御及び管理するものであり、例えば、プロセッサ等により構成してよい。また、制御部２８は、記憶部に記憶しているプログラムを読み出して実行し、様々な機能を実現させてよい。 The control unit 28 controls and manages the entire fuel cell device 20 and may be configured, for example, by a processor. The control unit 28 may also read and execute programs stored in the memory unit to realize various functions.

熱交換器２９は、循環経路３２を介して、例えば、貯水ユニット２３に設けられる貯湯槽３３と連結されてよい。貯湯槽３３に貯水された水が、後述する循環ポンプ３０によって、循環経路３２で循環してよい。循環経路３２は、貯湯槽３３から流出して熱交換器２９に流入する第１経路３４、及び熱交換器２９から流出して貯湯槽３３に流入する第２経路３５を含んでよい。熱交換器２９には、排熱回収部２７から排ガスが供給されてよい。熱交換器２９は、排ガスおよび循環経路３２内の水の間で熱交換してよい。例えば、熱交換器２９は、比較的高温の排ガスの熱エネルギーを用いて、第１経路３４を介して貯湯槽３３から流入する水を加熱してよい。加熱された水は、第２経路３５を介して貯湯槽３３に供給されてよい。 The heat exchanger 29 may be connected to, for example, a hot water tank 33 provided in the water storage unit 23 via a circulation path 32. The water stored in the hot water tank 33 may be circulated through the circulation path 32 by a circulation pump 30 described later. The circulation path 32 may include a first path 34 that flows out of the hot water tank 33 and flows into the heat exchanger 29, and a second path 35 that flows out of the heat exchanger 29 and flows into the hot water tank 33. The heat exchanger 29 may be supplied with exhaust gas from the exhaust heat recovery section 27. The heat exchanger 29 may exchange heat between the exhaust gas and the water in the circulation path 32. For example, the heat exchanger 29 may use the thermal energy of the relatively high temperature exhaust gas to heat the water flowing in from the hot water tank 33 via the first path 34. The heated water may be supplied to the hot water tank 33 via the second path 35.

循環ポンプ３０は、循環経路３２上の任意の位置に設けられてよい。図６に示す例では、循環ポンプ３０は、第１経路３４上に設けられ、貯湯槽３３から流入する水を循環経路３２内で循環させる。 The circulation pump 30 may be provided at any position on the circulation path 32. In the example shown in FIG. 6, the circulation pump 30 is provided on the first path 34 and circulates the water flowing in from the hot water tank 33 within the circulation path 32.

本実施形態の配管接合体を備えるラジエータ２１は、第１経路３４上の任意の位置に設けられる。図６に示す例では、ラジエータ２１は、循環ポンプ３０および貯湯槽３３の間に設けられている。ラジエータ２１は、例えば第１経路３４内の水の温度が所定の温度以上となった場合に、第１経路３４内の水を冷却してよい。 The radiator 21 having the pipe joint of this embodiment is provided at any position on the first path 34. In the example shown in FIG. 6, the radiator 21 is provided between the circulation pump 30 and the hot water tank 33. The radiator 21 may cool the water in the first path 34, for example, when the temperature of the water in the first path 34 becomes equal to or higher than a predetermined temperature.

本実施形態の燃料電池装置２０では、後述する配管接合体を備えるラジエータ２１を採用することにより、流体の漏洩の可能性を低減できることから、長期信頼性の向上したラジエータ２１、さらには燃料電池装置２０とすることができる。 In the fuel cell device 20 of this embodiment, the radiator 21 equipped with the piping joint described below is used, which reduces the possibility of fluid leakage, resulting in a radiator 21 and thus a fuel cell device 20 with improved long-term reliability.

貯水ユニット２３は、貯湯槽３３及びバックアップ熱源機３６を有してよい。 The water storage unit 23 may have a hot water tank 33 and a backup heat source unit 36.

貯湯槽３３は、水道局３７から供給される水道水を貯水してよい。また、貯湯槽３３は、第２経路３５を介して熱交換器２９から供給される加熱された水も貯水してよい。貯湯槽３３は、貯水された水（お湯）を給湯負荷３８に供給してよい。 The hot water tank 33 may store tap water supplied from a waterworks 37. The hot water tank 33 may also store heated water supplied from the heat exchanger 29 via the second path 35. The hot water tank 33 may supply the stored water (hot water) to a hot water supply load 38.

バックアップ熱源機３６は、貯湯槽３３に貯水される水の水温が需要家の所望の水温になるように加熱してよい。 The backup heat source unit 36 may heat the water stored in the hot water tank 33 so that its temperature becomes the consumer's desired water temperature.

電力負荷３１は、需要家施設に設置される電気機器等であってよい。また、電力負荷３１は、燃料電池装置２０と、電力系統３９から供給される電力を消費してよい。電力負荷３１は、例えば、エアコン、テレビ、冷蔵庫等であってよい。 The power load 31 may be an electrical device or the like installed in a consumer facility. The power load 31 may consume power supplied from the fuel cell device 20 and the power grid 39. The power load 31 may be, for example, an air conditioner, a television, a refrigerator, etc.

給湯負荷３８は、貯水ユニット２３の貯湯槽３３から供給される水を利用する負荷であってよい。給湯負荷３７は、例えば、浴槽、または床暖房等であってよい。 The hot water supply load 38 may be a load that uses water supplied from the hot water tank 33 of the water storage unit 23. The hot water supply load 37 may be, for example, a bathtub or a floor heating system.

以上のような構成の本実施形態の配管接合体１０は、第１の配管１１に第２の配管１２の先端が挿入された状態で第１の配管１１及び当該先端を接合する接合部１３を備え、第２の配管１２の先端位置における第１の配管１１の最大銅結晶粒度は、第１の配管１１の先端位置における最大銅結晶粒度より小さい。このような構成により、配管接合体１０は、第１の配管１１の先端側において最大銅結晶粒度が比較的大きいので接合部１３と第１の配管１１及び第２の配管１２の結合性を向上させる。また、配管接合体１０は、第２の配管１２の先端近傍の第１の配管１１の最大銅結晶粒度が比較的小さいので、腐食及び侵食等に対する強度を向上させる。したがって、配管接合体１０は、連結箇所からの流体の漏洩の可能性を低減する。 The pipe joint 10 of this embodiment, configured as described above, includes the first pipe 11 and the joint 13 that joins the tip of the second pipe 12 when the tip of the second pipe 12 is inserted into the first pipe 11, and the maximum copper crystal grain size of the first pipe 11 at the tip position of the second pipe 12 is smaller than the maximum copper crystal grain size at the tip position of the first pipe 11. With this configuration, the pipe joint 10 improves the connection between the joint 13 and the first pipe 11 and the second pipe 12 because the maximum copper crystal grain size is relatively large at the tip side of the first pipe 11. In addition, the pipe joint 10 improves the strength against corrosion and erosion because the maximum copper crystal grain size of the first pipe 11 near the tip of the second pipe 12 is relatively small. Therefore, the pipe joint 10 reduces the possibility of fluid leakage from the connection point.

また、本実施形態の配管接合体１０では、接合部１３は第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの間で、第１の配管１１の先端側から第２の配管１２の先端側に向かって延在し、第２の配管１２の先端よりも第１の配管１１の先端側において終端する。一般的に、配管に用いる金属材料と異なる材料であるろう材を用いてろう付けした構造体内部に、水等の電解質が流動すると配管にガルパニック腐食が発生しうる。例えば、図６に示すように、接合部１３’が、第２の配管１２’の先端を超えた位置で終端する配管接合体１０’においては、流体に接触し得る接合部１３’の面積が比較的広く、第１の配管１１‘等にガルパニック腐食が生じやすい。このような事象に対して、上述の構成を有する配管接合体１０では、流体に接触する接合部１３の面積が比較的小さいので、ガルパニック腐食の影響を低減する。 In the pipe joint 10 of this embodiment, the joint 13 extends from the tip of the first pipe 11 to the tip of the second pipe 12 between the inner peripheral surface is of the first pipe 11 and the outer peripheral surface os of the second pipe 12, and terminates at the tip of the first pipe 11 rather than the tip of the second pipe 12. In general, when an electrolyte such as water flows inside a structure brazed using a brazing material that is a material different from the metal material used for the pipe, galvanic corrosion may occur in the pipe. For example, as shown in FIG. 6, in a pipe joint 10' in which the joint 13' terminates at a position beyond the tip of the second pipe 12', the area of the joint 13' that may come into contact with the fluid is relatively large, and galvanic corrosion is likely to occur in the first pipe 11', etc. In response to such an event, in the pipe joint 10 having the above-mentioned configuration, the area of the joint 13 that comes into contact with the fluid is relatively small, thereby reducing the effect of galvanic corrosion.

また、本実施形態の配管接合体１０では、接合部１３は軸方向において第１の配管１１の先端及び第２の配管１２の先端の中央位置よりも第１の配管１１の先端側に多く分布する。このような構成により、配管接合体１０では、流体と接触せずガルパニック腐食を生じない接合部１３の部分が多いので、第１の配管１１及び第２の配管１２を強固に固定し得る。 In addition, in the pipe joint 10 of this embodiment, the joints 13 are distributed more toward the tip of the first pipe 11 than the center position between the tip of the first pipe 11 and the tip of the second pipe 12 in the axial direction. With this configuration, the pipe joint 10 has many parts of the joints 13 that do not come into contact with the fluid and do not cause galvanic corrosion, so the first pipe 11 and the second pipe 12 can be firmly fixed.

本開示に係る実施形態について、諸図面及び実施例に基づき説明してきたが、当業者であれば本開示に基づき種々の変形又は修正を行うことが容易であることに注意されたい。従って、これらの変形又は修正は本開示の範囲に含まれることに留意されたい。例えば、各構成部又は各ステップなどに含まれる機能などは論理的に矛盾しないように再配置可能であり、複数の構成部又はステップなどを１つに組み合わせたり、或いは分割したりすることが可能である。本開示に係る実施形態について装置を中心に説明してきたが、本開示に係る実施形態は装置の各構成部が実行するステップを含む方法としても実現し得るものである。本開示に係る実施形態は装置が備えるプロセッサにより実行される方法、プログラム、又はプログラムを記録した記憶媒体としても実現し得るものである。本開示の範囲にはこれらも包含されるものと理解されたい。 Although the embodiments of the present disclosure have been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications or corrections based on the present disclosure. Therefore, it should be noted that these modifications or corrections are included in the scope of the present disclosure. For example, the functions included in each component or step can be rearranged so as not to cause logical inconsistencies, and multiple components or steps can be combined into one or divided. Although the embodiments of the present disclosure have been described mainly with respect to the device, the embodiments of the present disclosure can also be realized as a method including steps executed by each component of the device. The embodiments of the present disclosure can also be realized as a method, a program, or a storage medium on which a program is recorded, executed by a processor provided in the device. It should be understood that these are also included in the scope of the present disclosure.

例えば、本実施形態において、第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの隙間が受部１６を除いて均一であるが、このような構成に限定されない。配管接合体１０では、第２の配管１２の先端近傍に、第１の配管１１の内周面ｉｓ及び第２の配管１２の外周面ｏｓの隙間が他の部分より小さい部分が形成されていてよい。また、隙間が他の部分より小さい部分よりも、第１の配管１１の先端側において接合部１３が終端してよい。例えば、図７に示すように、周方向に沿って内部に陥凹する絞部１９を第１の配管１１０に形成して、他の部分より隙間の小さな配管接合体１００が形成されてよい。また、例えば、図８に示すように、先端に向かうにつれ縮径させた第２の配管１２１を、第１の配管１１の本体１４側に当接させることにより、他の部分より隙間の小さな配管接合体１０１が形成されてよい。このような構成を有することにより、接合部１３への流体の到達の可能性が、さらに低減される。 For example, in this embodiment, the gap between the inner circumferential surface is of the first pipe 11 and the outer circumferential surface os of the second pipe 12 is uniform except for the receiving portion 16, but is not limited to such a configuration. In the pipe joint 10, a portion in which the gap between the inner circumferential surface is of the first pipe 11 and the outer circumferential surface os of the second pipe 12 is smaller than other portions may be formed near the tip of the second pipe 12. Also, the joint portion 13 may terminate closer to the tip side of the first pipe 11 than the portion in which the gap is smaller than other portions. For example, as shown in FIG. 7, a constricted portion 19 that is recessed inward along the circumferential direction may be formed in the first pipe 110 to form a pipe joint 100 having a smaller gap than other portions. Also, for example, as shown in FIG. 8, a pipe joint 101 having a smaller gap than other portions may be formed by abutting the second pipe 121, which is reduced in diameter toward the tip, against the main body 14 side of the first pipe 11. This configuration further reduces the possibility of fluid reaching the joint 13.

本開示において「第１」、「第２」などの記載は、当該構成を区別するための識別子である。本開示における「第１」、「第２」などの記載で区別された構成は、当該構成における番号を交換することができる。識別子の交換は同時に行われる。識別子の交換後も当該構成は区別される。識別子は削除してよい。識別子を削除した構成は、符号で区別される。本開示における「第１」、「第２」などの識別子の記載のみに基づいて、当該構成の順序の解釈、小さい番号の識別子が存在することの根拠に利用してはならない。 In this disclosure, descriptions such as "first" and "second" are identifiers for distinguishing the configuration. Configurations distinguished by descriptions such as "first" and "second" in this disclosure may have their numbers exchanged. The exchange of identifiers is performed simultaneously. The configurations remain distinguished even after the exchange of identifiers. Identifiers may be deleted. Configurations from which identifiers have been deleted are distinguished by symbols. Descriptions of identifiers such as "first" and "second" in this disclosure should not be used solely to interpret the order of the configurations or to justify the existence of identifiers with smaller numbers.

１０、１００、１０１、１０’ 配管接合体
１１、１１０ 第１の配管
１２、１２１ 第２の配管
１３ 接合部
１４ 本体
１５ 雌型嵌合部
１６ 受部
１７ ろう材
１８ バーナ
１９ 絞部
２０ 燃料電池装置
２１ ラジエータ
２２ 燃料電池ユニット
２３ 貯水ユニット
２４ 補器部
２５ 発電部
２６ 電力変換部
２７ 排熱回収部
２８ 制御部
２９ 熱交換器
３０ 循環ポンプ
３１ 電力負荷
３２ 循環径路
３３ 貯湯槽
３４ 第１経路
３５ 第２経路
３６ バックアップ熱源機
３７ 水道局
３８ 給湯負荷
３９ 電力系統
ｉｓ 第１の配管の内周面
ｏｓ 第２の配管の内周面 REFERENCE SIGNS LIST 10, 100, 101, 10' Pipe joint 11, 110 First pipe 12, 121 Second pipe 13 Joint 14 Main body 15 Female fitting 16 Receiving portion 17 Brazing material 18 Burner 19 Constriction 20 Fuel cell device 21 Radiator 22 Fuel cell unit 23 Water storage unit 24 Auxiliary section 25 Power generation section 26 Power conversion section 27 Exhaust heat recovery section 28 Control section 29 Heat exchanger 30 Circulation pump 31 Power load 32 Circulation path 33 Hot water storage tank 34 First path 35 Second path 36 Backup heat source unit 37 Waterworks 38 Hot water supply load 39 Power system is Inner surface of first pipe os Inner surface of second pipe

Claims (5)

銅を主成分とした材料から形成される第１の配管及び第２の配管と、
前記第１の配管に前記第２の配管の先端が挿入された状態で、前記第１の配管と前記第２の配管の先端とは離れており、前記第１の配管における前記第２の配管の挿入方向に対して反対側に位置する先端側から前記第２の配管の先端側に向かって延在し、前記第２の配管の先端よりも前記第１の配管の先端側において終端して前記第１の配管及び前記第２の配管に接合する接合部と、を備え、
前記第２の配管の先端位置における前記第１の配管の最大銅結晶粒度は、前記第１の配管の先端位置における最大銅結晶粒度より小さい
配管接合体。 A first pipe and a second pipe formed from a material mainly composed of copper;
a joint portion that is spaced apart from the first pipe when the tip of the second pipe is inserted into the first pipe, extends from a tip side of the first pipe that is opposite to the insertion direction of the second pipe toward the tip side of the second pipe, and terminates on the tip side of the first pipe relative to the tip of the second pipe to be joined to the first pipe and the second pipe ,
A pipe assembly, wherein a maximum copper grain size of the first pipe at a tip position of the second pipe is smaller than a maximum copper grain size of the first pipe at a tip position of the first pipe. 請求項１に記載の配管接合体において、
前記第２の配管の先端近傍に、前記第１の配管の内周面及び前記第２の配管の外周面の隙間が他の部分より小さい部分が形成されている
配管接合体。 The pipe joint assembly according to claim 1 ,
a portion in the vicinity of a tip of the second pipe where a gap between an inner peripheral surface of the first pipe and an outer peripheral surface of the second pipe is smaller than other portions. 請求項１又は２に記載の配管接合体において、
前記接合部は、前記配管接合体の軸方向において、前記第１の配管の先端及び前記第２の配管の先端の中央位置よりも前記第１の配管の先端側に多く分布する
配管接合体。 The pipe joint assembly according to claim 1 or 2 ,
The joint portion is distributed more toward the tip side of the first pipe than at a center position between the tip of the first pipe and the tip of the second pipe in an axial direction of the joint portion. 請求項１から３のいずれか１項に記載の配管接合体を、備えるラジエータ。 A radiator comprising the pipe joint body according to any one of claims 1 to 3 . 請求項４に記載のラジエータを、備える燃料電池装置。 A fuel cell device comprising the radiator according to claim 4 .
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