JP2022134436A - Refrigerant piping for air conditioning unit, air conditioning unit, and manufacturing method for refrigerant piping for air conditioning unit - Google Patents

Refrigerant piping for air conditioning unit, air conditioning unit, and manufacturing method for refrigerant piping for air conditioning unit Download PDF

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JP2022134436A
JP2022134436A JP2021033557A JP2021033557A JP2022134436A JP 2022134436 A JP2022134436 A JP 2022134436A JP 2021033557 A JP2021033557 A JP 2021033557A JP 2021033557 A JP2021033557 A JP 2021033557A JP 2022134436 A JP2022134436 A JP 2022134436A
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piping member
stamped
piping
increased diameter
air conditioner
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将貴 谷本
Masaki Tanimoto
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Mitsubishi Electric Corp
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Abstract

To provide refrigerant piping for an air conditioning unit, the refrigerant piping materializing reduction of manufacturing cost thereof and furthermore materializing improvement of efficiency of work for positioning of the piping member of the refrigerant piping.SOLUTION: Refrigerant piping for an air conditioning unit comprises: a first piping member having a first main body portion and an increased-diameter portion having an outer diameter larger than that of the first main body portion and provided at an end of the first main body portion; and a second piping member having a second main body portion and a joining portion provided at an end of the second main body portion and inserted in the increased-diameter portion of the first piping member; wherein the first piping member has a first marking portion formed on an outer surface of the increased-diameter portion; wherein the second piping member has a second marking portion formed on an outer surface of the second main body portion; wherein respective positions where the first marking portion and the second marking portion are formed coincide with respective axial directions of the first piping member and the second piping member; and wherein a brazing material is filled between the increased-diameter portion and the joining portion.SELECTED DRAWING: Figure 1

Description

本開示は、空気調和機の冷媒配管、空気調和機、及び空気調和機の冷媒配管の製造方法に関する。 The present disclosure relates to a refrigerant pipe for an air conditioner, an air conditioner, and a method for manufacturing the refrigerant pipe for the air conditioner.

空気調和機が有する、熱交換器、圧縮機、及び膨張弁等の機器は、空気調和機の室外機等に格納される。空気調和機の機器間の接続には配管が用いられており、複数の配管部材を組み合わせて接合することで、所望の形状の冷媒配管を形成している。複数の配管部材は、それぞれろう付けにより接合されており、複数の配管部材の接合には、位置決めが伴うため、作業者の技巧を要する。従来、雄側継手を有する第１配管部材と、雌側継手を有する第２配管部材とを備える配管において、第１配管部材と第２配管部材との位置決めのため、係止部材を有する配管継手を第２配管部材外周に装着し、第２配管部材に形成された窓部に係止部材を係合させ、円周方向に回転することを防止していた（例えば、特許文献１参照）。 Devices such as a heat exchanger, a compressor, and an expansion valve that an air conditioner has are housed in an outdoor unit of the air conditioner or the like. Piping is used for connection between devices of an air conditioner, and a refrigerant pipe having a desired shape is formed by combining and joining a plurality of piping members. The plurality of piping members are each joined by brazing, and the joining of the plurality of piping members requires skill of the operator because positioning is required. Conventionally, in piping comprising a first piping member having a male joint and a second piping member having a female joint, a piping joint having a locking member for positioning the first piping member and the second piping member is attached to the outer periphery of the second piping member, and a locking member is engaged with a window formed in the second piping member to prevent it from rotating in the circumferential direction (see, for example, Patent Document 1).

特開２００６－３１３０１０号公報Japanese Patent Application Laid-Open No. 2006-313010

しかしながら、作業者の技巧を要する作業である、配管部材の位置決め作業を容易とする必要がある一方で、配管部材の位置決めの作業性を向上するためには、上記特許文献のように、部品点数を増加せざるを得なく製造コストが増加する。そのため、空気調和機に用いられる配管において、製造コストを削減しながら、配管部材の位置決めの作業性向上をできないという課題があった。 However, while it is necessary to facilitate the positioning work of the piping members, which is a work that requires skill of the operator, in order to improve the workability of positioning the piping members, as in the above patent document, the number of parts is increased. is unavoidably increased, resulting in an increase in manufacturing cost. Therefore, in the piping used in the air conditioner, there is a problem that the workability of positioning the piping member cannot be improved while reducing the manufacturing cost.

本開示は、上述の課題を解決するためになされたもので、製造コストを削減しながら、配管部材の位置決め作業性を向上する空気調和機の冷媒配管を提供することを目的とする。 The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide a refrigerant pipe for an air conditioner that reduces manufacturing costs and improves positioning workability of pipe members.

本開示に係る空気調和機の冷媒配管は、第１本体部と、第１本体部の外径よりも大きい外径を有し第１本体部の端部に設けられた増径部とを有する第１配管部材と、第２本体部と、第２本体部の端部に設けられ、第１配管部材の増径部に挿入された接合部とを有する第２配管部材と、を備え、第１配管部材は、増径部の外表面に第１刻印部が形成され、第２配管部材は、第２本体部の外表面に第２刻印部が形成され、第１刻印部及び第２刻印部が形成された位置は、第１配管部材及び第２配管部材の軸方向に一致しており、増径部及び接合部の間には、ろう材が充填されているものである。 A refrigerant pipe for an air conditioner according to the present disclosure includes a first main body and an increased diameter portion having an outer diameter larger than the outer diameter of the first main body and provided at an end of the first main body. a second piping member having a first piping member, a second main body, and a joint portion provided at an end of the second main body and inserted into the increased diameter portion of the first piping member; The first piping member has a first marking portion formed on the outer surface of the increased diameter portion, and the second piping member has a second marking portion formed on the outer surface of the second body portion. The positions where the portions are formed are aligned in the axial direction of the first piping member and the second piping member, and a brazing material is filled between the increased diameter portion and the joint portion.

また、本開示に係る空気調和機は、熱交換器、圧縮機、及び膨張弁を内部に収納した室外機と、本開示に係る空気調和機の冷媒配管と、を備え、熱交換器、圧縮機、及び主膨張弁が空気調和機の冷媒配管により接続されているものである。 Further, an air conditioner according to the present disclosure includes an outdoor unit in which a heat exchanger, a compressor, and an expansion valve are accommodated, and refrigerant piping of the air conditioner according to the present disclosure. The air conditioner and the main expansion valve are connected by refrigerant piping of the air conditioner.

また、本開示に係る空気調和機の冷媒配管の製造方法は、第１配管部材が有する第１本体部の端部に、第１本体部の外径よりも大きい外径を有する増径部を形成する工程と、第１配管部材の増径部の外表面に、第１刻印部を形成する工程と、第２配管部材が有する第２本体部の外表面に、第２刻印部を形成する工程と、第１配管部材の増径部に、第２配管部材が有する、第２本体部の端部に設けられた接合部を挿入する工程と、第１刻印部及び第２刻印部を、第１配管部材及び第２配管部材の軸方向において一致させる工程と、第１配管部材の増径部と、第２配管部材の接合部との間にろう材を流入させ、第１配管部材と第２配管部材とを接合する工程とを備えたものである。 Further, in the method for manufacturing a refrigerant pipe for an air conditioner according to the present disclosure, a diameter-increased portion having an outer diameter larger than the outer diameter of the first main body is provided at the end of the first main body of the first piping member. forming a first stamped portion on the outer surface of the increased diameter portion of the first piping member; and forming a second stamped portion on the outer surface of the second body portion of the second piping member. a step of inserting a joining portion provided at the end of the second body portion of the second piping member into the increased diameter portion of the first piping member; A step of aligning the first piping member and the second piping member in the axial direction, allowing the brazing material to flow between the increased diameter portion of the first piping member and the joint portion of the second piping member, and the first piping member and a step of joining the second piping member.

本開示によれば、冷媒配管の製造コストを削減しながら、配管部材の位置決めの作業性を向上できる。 According to the present disclosure, it is possible to improve the workability of positioning the piping member while reducing the manufacturing cost of the refrigerant piping.

実施の形態１に係る空気調和機の冷媒配管を概略的に示す斜視図である。2 is a perspective view schematically showing refrigerant piping of the air conditioner according to Embodiment 1. FIG. 実施の形態１に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 1; 実施の形態１に係る空気調和機の冷媒配管を概略的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing refrigerant piping of the air conditioner according to Embodiment 1; 実施の形態１に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 1; 実施の形態１に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 1; 実施の形態１に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 1; 実施の形態１に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 4 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 1; 実施の形態２に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 10 is an explanatory diagram showing a method for manufacturing the refrigerant pipe of the air conditioner according to Embodiment 2; 実施の形態２に係る空気調和機の冷媒配管を概略的に示す断面図である。FIG. 7 is a cross-sectional view schematically showing refrigerant piping of an air conditioner according to Embodiment 2; 実施の形態３に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 10 is an explanatory diagram showing a method of manufacturing refrigerant pipes for an air conditioner according to Embodiment 3; 実施の形態３に係る空気調和機の冷媒配管の製造方法を示す説明図である。FIG. 10 is an explanatory diagram showing a method of manufacturing refrigerant pipes for an air conditioner according to Embodiment 3;

以下、図面に基づいて実施の形態について説明する。 Embodiments will be described below with reference to the drawings.

実施の形態１．
図１は、実施の形態１に係る空気調和機の冷媒配管１００を概略的に示す斜視図である。冷媒配管１００は、雌側の配管部材である第１配管部材１と、雄側の配管部材である第２配管部材２とを備える。また、冷媒配管１００は、第１配管部材１の増径部１ｂに第２配管部材２が挿入され、第１配管部材１と第２配管部材２とが接合されて構成される。なお、第１配管部材１及び第２配管部材２はそれぞれ、例えば、鋼材、銅合金材、アルミニウム合金材等の金属で構成されている。 Embodiment 1.
FIG. 1 is a perspective view schematically showing a refrigerant pipe 100 of an air conditioner according to Embodiment 1. FIG. Refrigerant piping 100 includes a first piping member 1 that is a female piping member and a second piping member 2 that is a male piping member. The refrigerant pipe 100 is configured by inserting the second pipe member 2 into the increased diameter portion 1b of the first pipe member 1 and joining the first pipe member 1 and the second pipe member 2 together. In addition, the 1st piping member 1 and the 2nd piping member 2 are each comprised with metals, such as a steel material, a copper alloy material, an aluminum alloy material, for example.

第１配管部材１は、第１本体部１ａと、第１本体部１ａにおける一方の端部に設けられた増径部１ｂとを有する。ここで、第１配管部材１における増径部１ｂの外径は、第１本体部１ａの外径よりも大きく、増径部１ｂの内径も第１本体部１ａの外径よりも大きい。さらに、第１本体部１ａと増径部１ｂとの間には接続部１ｃが設けられている。すなわち、第１配管部材１における第１本体部１ａ、接続部１ｃ、及び増径部１ｂの各構成は、端部に向かって第１本体部１ａ、接続部１ｃ、及び増径部１ｂの順に並んでいる。なお、本開示において、端部という場合は、厳密に端部である場合の他、端部から離間した位置における部位も含むものとする。 The first piping member 1 has a first body portion 1a and an increased diameter portion 1b provided at one end of the first body portion 1a. Here, the outer diameter of the increased diameter portion 1b in the first piping member 1 is larger than the outer diameter of the first body portion 1a, and the inner diameter of the increased diameter portion 1b is also greater than the outer diameter of the first body portion 1a. Furthermore, a connecting portion 1c is provided between the first body portion 1a and the increased diameter portion 1b. That is, each configuration of the first body portion 1a, the connection portion 1c, and the increased diameter portion 1b in the first piping member 1 is arranged in the order of the first body portion 1a, the connection portion 1c, and the increased diameter portion 1b toward the end. Lined up. In addition, in the present disclosure, the term "end portion" includes not only the strictly end portion, but also a portion at a position spaced apart from the end portion.

第２配管部材２は、第２本体部２ａと、第２本体部２ａの端部に設けられた接合部２ｂとを有する。なお、図１の例において、接合部２ｂは図示されていないが、接合部２ｂは、第１配管部材１の増径部１ｂの内側に位置しており、第２配管部材２において第１配管部材１の増径部１ｂと接合された部位である。第１配管部材１の増径部１ｂと、第２配管部材２の接合部２ｂとの間には、ろう材が充填されており、ろう材により第１配管部材１と第２配管部材とが接合されている。また、第２本体部２ａは、第２配管部材２において、接合部２ｂと連続し、第１配管部材１と離間する側に設けられた部位である。 The second piping member 2 has a second body portion 2a and a joint portion 2b provided at an end portion of the second body portion 2a. Although the joint 2b is not shown in the example of FIG. It is a portion joined to the increased diameter portion 1b of the member 1. FIG. A brazing material is filled between the increased diameter portion 1b of the first piping member 1 and the joint portion 2b of the second piping member 2, and the first piping member 1 and the second piping member are connected by the brazing material. are spliced. The second body portion 2 a is a portion of the second piping member 2 that is continuous with the joint portion 2 b and provided on the side that is separated from the first piping member 1 .

そして、第１配管部材１には第１刻印部３が設けられており、第２配管部材２には第２刻印部４が設けられている。作業者は、第１刻印部３及び第２刻印部４に基づいて第１配管部材１と第２配管部材２との回転方向における位置決めをし、後述する接合作業を行う。以下、空気調和機の冷媒配管１００の製造方法とともに、空気調和機の冷媒配管１００の各構成について説明する。図２は、実施の形態１に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図２には、第１配管部材１に第２配管部材２を挿入する工程を示している。 A first stamped portion 3 is provided on the first piping member 1 , and a second stamped portion 4 is provided on the second piping member 2 . The operator positions the first piping member 1 and the second piping member 2 in the rotational direction based on the first stamped portion 3 and the second stamped portion 4, and performs a joining operation, which will be described later. Hereinafter, each configuration of the refrigerant pipe 100 of the air conditioner will be described together with the manufacturing method of the refrigerant pipe 100 of the air conditioner. 2A and 2B are explanatory diagrams showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to Embodiment 1. FIG. FIG. 2 shows the process of inserting the second piping member 2 into the first piping member 1 .

第１配管部材１の増径部１ｂには、第２配管部材２が挿入される。第２配管部材２の接合部２ｂの外径は第１配管部材１の増径部１ｂの内径よりも小さく、接合部２ｂが第１配管部材１の増径部１ｂに挿入され、第１配管部材１に第２配管部材２が組付けられる。ここで、図２中に示す斜線部は、第２配管部材２の接合部２ｂを示している。 The second piping member 2 is inserted into the increased diameter portion 1 b of the first piping member 1 . The outer diameter of the joint portion 2b of the second piping member 2 is smaller than the inner diameter of the increased diameter portion 1b of the first piping member 1, and the joint portion 2b is inserted into the increased diameter portion 1b of the first piping member 1, and the first piping A second piping member 2 is assembled to the member 1 . Here, the hatched portion shown in FIG. 2 indicates the joint portion 2b of the second piping member 2. As shown in FIG.

次に、第１配管部材１の第１刻印部３及び第２配管部材２の第２刻印部４について説明する。空気調和機の冷媒配管１００において、配管形状を、設計にて予め定められた所望の形状とするため、例えば、図１に示すように、第１配管部材１と第２配管部材２とはそれぞれ屈曲している。さらに、所望の形状の冷媒配管１００を得るためには、第１配管部材１と第２配管部材２とは、回転方向において予め定められた位置関係とした後に接合する必要がある。つまり、第１配管部材１と第２配管部材２とのそれぞれについて、回転方向において位置決めを行った後、第１配管部材１と第２配管部材２とを接合する必要がある。 Next, the first stamped portion 3 of the first piping member 1 and the second stamped portion 4 of the second piping member 2 will be described. In the refrigerant pipe 100 of the air conditioner, in order to make the pipe shape a desired shape predetermined by design, for example, as shown in FIG. bent. Furthermore, in order to obtain the desired shape of the refrigerant pipe 100, the first pipe member 1 and the second pipe member 2 need to be joined after establishing a predetermined positional relationship in the rotational direction. In other words, it is necessary to join the first piping member 1 and the second piping member 2 after positioning the first piping member 1 and the second piping member 2 in the rotational direction.

図２に戻り、第１刻印部３及び第２刻印部４を用いた第１配管部材１と第２配管部材２との位置決め作業について説明する。第１刻印部３と第２刻印部４とは、軸５（図２中に示す破線）を中心に円周方向に回転させ、軸方向（図２中上下方向）においてそれぞれの位置を合わせることで、上述の所望の形状の冷媒配管１００を得られるように設けられている。すなわち、第１刻印部３及び第２刻印部４は、第１配管部材１及び第２配管部材２の位置合わせを行った後は、第１刻印部３及び第２刻印部４が形成された位置が第１配管部材１及び第２配管部材２の軸方向において一致する。 Returning to FIG. 2, the operation of positioning the first piping member 1 and the second piping member 2 using the first marking portion 3 and the second marking portion 4 will be described. The first stamping part 3 and the second stamping part 4 are rotated in the circumferential direction around the shaft 5 (broken line shown in FIG. 2), and aligned in the axial direction (vertical direction in FIG. 2). , and is provided so as to obtain the refrigerant pipe 100 having the desired shape described above. That is, the first stamped portion 3 and the second stamped portion 4 are formed after the first piping member 1 and the second piping member 2 are aligned. The positions of the first piping member 1 and the second piping member 2 are aligned in the axial direction.

つまり、作業者は、第１刻印部３と第２刻印部４とを位置合わせすれば、第１配管部材１と第２配管部材２との回転方向における位置決めを行い、設計にて予め定められた所望の形状の配管を得ることができる。このように、第１刻印部３と第２刻印部４とに基づいて位置決めを行えば、設計図等を参照しながらの位置決め作業が不要となり、配管の位置決めの作業性が向上する。 In other words, if the first stamped portion 3 and the second stamped portion 4 are aligned, the operator can position the first piping member 1 and the second piping member 2 in the rotational direction. It is possible to obtain a pipe having a desired shape. In this manner, positioning based on the first stamped portion 3 and the second stamped portion 4 eliminates the need for positioning work while referring to design drawings and the like, thereby improving the workability of piping positioning.

さらに、第１刻印部３と、第２刻印部４とに基づいて位置決めを行えば、後述の接合工程で、第１配管部材１及び第２配管部材２の回転方向の位置決めを行った状態でろう材を流し込むことができるため、第１配管部材１と第２配管部材２を治具等で位置決めして固定せずともろう材を流し込むことができ、ろう付け作業の品質が安定する。このように、第１刻印部３と、第２刻印部４とを設けることで、ろう付け作業時の冷媒配管１００の回転方向の位置決めに、位置決め用の部品の追加又は複雑な加工を必要としない。 Furthermore, if the positioning is performed based on the first stamped portion 3 and the second stamped portion 4, in the joining step described later, the first piping member 1 and the second piping member 2 are positioned in the rotational direction. Since the brazing material can be poured, the brazing material can be poured without positioning and fixing the first piping member 1 and the second piping member 2 with a jig or the like, and the quality of the brazing work is stabilized. By providing the first stamped portion 3 and the second stamped portion 4 in this manner, positioning of the refrigerant pipe 100 in the rotational direction during brazing work does not require addition of positioning parts or complicated processing. do not do.

また、図２に示すように、第１刻印部３は、増径部１ｂの外表面に設けられている。一方、第２刻印部４は、第２配管部材２における第２本体部２ａの外表面に設けられている。第２刻印部４を、第２配管部材２における第２本体部２ａに設けると、第２配管部材２の接合部２ｂを第１配管部材１の増径部１ｂに挿入したとしても、作業者が第２刻印部４を視認できるため、位置決め作業及び接合作業の作業性が向上する。 Further, as shown in FIG. 2, the first stamped portion 3 is provided on the outer surface of the increased diameter portion 1b. On the other hand, the second stamped portion 4 is provided on the outer surface of the second body portion 2a of the second piping member 2 . When the second stamped portion 4 is provided on the second main body portion 2a of the second piping member 2, even if the joint portion 2b of the second piping member 2 is inserted into the increased diameter portion 1b of the first piping member 1, the operator can can visually recognize the second stamped portion 4, the workability of the positioning work and the joining work is improved.

次に、第１配管部材１及び第２配管部材２の接合作業について説明する。図３は、実施の形態１に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図３には、第１配管部材１と第２配管部材２とを接合した状態における断面図を示している。接合作業において、まず、第１配管部材１に第２配管部材２を挿入し、第１配管部材１と第２配管部材２との回転方向における位置決めを行う。そして、第１配管部材１の増径部１ｂの内面と、第２配管部材２の接合部２ｂの外面との間に形成された間隙に、ろう材６を流入させる。すなわち、第１配管部材１に第１刻印部３を、第２配管部材２に第２刻印部４を設け、第１配管部材１と第２配管部材２とをろう付けにより接合すれば、第１配管部材１と第２配管部材２との位置決めのための他の部材を追加する等、部品点数を増加させることを不要としながら、位置決めの作業性を向上できる。 Next, the joining operation of the first piping member 1 and the second piping member 2 will be described. 3A and 3B are explanatory diagrams showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to Embodiment 1. FIG. FIG. 3 shows a cross-sectional view in which the first piping member 1 and the second piping member 2 are joined together. In the joining operation, first, the second piping member 2 is inserted into the first piping member 1, and the first piping member 1 and the second piping member 2 are positioned in the rotational direction. Then, the brazing material 6 is allowed to flow into the gap formed between the inner surface of the increased diameter portion 1 b of the first piping member 1 and the outer surface of the joint portion 2 b of the second piping member 2 . That is, if the first stamped portion 3 is provided on the first piping member 1, the second stamped portion 4 is provided on the second piping member 2, and the first piping member 1 and the second piping member 2 are joined by brazing, the The workability of positioning can be improved without increasing the number of parts, such as adding another member for positioning the first piping member 1 and the second piping member 2 .

また、ろう材６は、バーナー等により第１配管部材１の増径部１ｂの近傍を熱されることで、加熱されて溶融し、第１配管部材１の増径部１ｂと第２配管部材２の接合部２ｂの間隙に流入する。そして、ろう材６を冷却し、第１配管部材１と第２配管部材２とを接合する。なお、冷媒配管１００内部には、冷媒が流れるため、冷媒配管１００外部に冷媒が流出することを防ぐため、気密性を確保する必要がある。気密性確保のためにＯリングを用いると、Ｏリングへの負荷による劣化等で気密性確保が困難となる場合があるが、ろう材６を用いて第１配管部材１と第２配管部材２とを接合すれば、劣化が発生し得る部品であるＯリングを設けずとも、気密性を確保できる。 Further, the brazing material 6 is heated and melted by heating the vicinity of the increased diameter portion 1b of the first piping member 1 by a burner or the like, and the increased diameter portion 1b of the first piping member 1 and the second piping member 2 are separated from each other. flows into the gap of the joint 2b. Then, the brazing material 6 is cooled, and the first piping member 1 and the second piping member 2 are joined. In addition, since the refrigerant flows inside the refrigerant pipe 100, it is necessary to ensure airtightness in order to prevent the refrigerant from flowing out to the outside of the refrigerant pipe 100. FIG. If an O-ring is used to ensure airtightness, it may become difficult to ensure airtightness due to deterioration due to load on the O-ring. By joining the , airtightness can be ensured without providing an O-ring, which is a component that may deteriorate.

また、空気調和機が有する機器間を冷媒配管１００により接続する場合は、冷媒配管１００における第１配管部材１を一方の機器に接続し、冷媒配管１００における第２配管部材２を他方の機器に接続すればよい。ここで、空気調和機が有する機器とは、例えば、空気調和機の室外機に収納された、蒸発器又は凝縮器の熱交換器、圧縮機、及び膨張弁等、冷凍サイクルを構成する機器の一部である。 Further, when connecting devices included in the air conditioner with the refrigerant pipe 100, the first pipe member 1 in the refrigerant pipe 100 is connected to one device, and the second pipe member 2 in the refrigerant pipe 100 is connected to the other device. Just connect. Here, the devices that the air conditioner has include, for example, the devices that make up the refrigeration cycle, such as heat exchangers for evaporators or condensers, compressors, and expansion valves that are housed in the outdoor unit of the air conditioner. It is part.

ここで、図３に示すように、第１刻印部３は、増径部１ｂの外表面が第１配管部材１の長手方向（図３中上下方向）に切りかかれてスリット状に形成されており、第２刻印部４は、第２配管部材２の第２本体部２ａの外表面が第２配管部材２の長手方向（図３中上下方向）に切りかかれてスリット状に形成されている。このようにすると、第１配管部材１と第２配管部材２との位置決めにおいて、第１刻印部３と第２刻印部４とが一致する領域を狭めることができ、位置決めの精度を向上できる。 Here, as shown in FIG. 3, the first stamped portion 3 is formed in a slit shape by cutting the outer surface of the increased diameter portion 1b in the longitudinal direction of the first piping member 1 (vertical direction in FIG. 3). The second stamped portion 4 is formed in a slit shape by cutting the outer surface of the second main body portion 2a of the second piping member 2 in the longitudinal direction of the second piping member 2 (vertical direction in FIG. 3). . In this way, in positioning the first piping member 1 and the second piping member 2, the area where the first stamped portion 3 and the second stamped portion 4 match can be narrowed, and the positioning accuracy can be improved.

なお、第１刻印部３の深さは、第１配管部材１の増径部１ｂの厚み、すなわち増径部１ｂの外径と内径の差に対して１割以上とすれば、第１刻印部３の視認性が向上する。また、第２刻印部４の深さについても、第２配管部材２の第２本体部２ａの厚み、すなわち第２本体部２ａの外径と内径の差に対して１割以上とすれば、第２刻印部４の視認性が向上する。 In addition, if the depth of the first stamped portion 3 is 10% or more of the thickness of the increased diameter portion 1b of the first piping member 1, that is, the difference between the outer diameter and the inner diameter of the increased diameter portion 1b, then the first stamped portion Visibility of the portion 3 is improved. Also, if the depth of the second stamped portion 4 is set to 10% or more of the thickness of the second body portion 2a of the second piping member 2, that is, the difference between the outer diameter and the inner diameter of the second body portion 2a, The visibility of the second stamped portion 4 is improved.

ところで、空気調和機の冷媒配管１００において、ろう材６と配管部材との境界、すなわち、図３に示すろう付け端部６ａと増径部１ｂとの境界は、応力拡大係数が高い。さらに、増径部１ｂと第１本体部１ａとの間の接続部１ｃも、応力拡大係数が高い。そのため、第１刻印部３を、例えば、増径部１ｂの中央部等、ろう付け端部６ａと増径部１ｂとの境界、及び接続部１ｃを避けた位置に設けると好ましい。このようにすれば、長期振動による疲労破壊を防止することができる。 By the way, in the refrigerant pipe 100 of the air conditioner, the stress intensity factor is high at the boundary between the brazing material 6 and the pipe member, that is, the boundary between the brazed end portion 6a and the increased diameter portion 1b shown in FIG. Furthermore, the stress intensity factor is also high in the connecting portion 1c between the increased diameter portion 1b and the first main body portion 1a. Therefore, it is preferable to provide the first stamped portion 3 at a position such as the central portion of the increased diameter portion 1b, avoiding the boundary between the brazing end portion 6a and the increased diameter portion 1b and the connecting portion 1c. In this way, fatigue fracture due to long-term vibration can be prevented.

また、同様に、第２刻印部４を、第２本体部２ａにおいて、ろう付け端部６ａと離間した位置等、ろう付け端部６ａを避けた位置に設けると好ましい。さらに、第２配管部材２の第２本体部２ａにおいて、屈曲した部位は、直線状の部位に比して応力拡大係数が高いため、第２刻印部４は、第２本体部２ａの直線状の部位に設けると好ましい。このようにすれば、長期振動による疲労破壊を防止することができ、ろう材６により第２刻印部４が隠れないため、第２刻印部４の視認性が向上する。なお、第２本体部２ａにおけるろう付け端部６ａと離間した位置とは、例えば、接合部２ｂから第２本体部２ａが設けられた側に、ろう材６の厚みと同程度の距離分、離間した位置である。 Similarly, it is preferable to provide the second stamped portion 4 at a position away from the brazing end portion 6a, such as a position spaced apart from the brazing end portion 6a, on the second main body portion 2a. Furthermore, in the second main body portion 2a of the second piping member 2, since the bent portion has a higher stress intensity factor than the straight portion, the second stamped portion 4 is formed on the straight portion of the second main body portion 2a. is preferably provided at the site of In this way, fatigue fracture due to long-term vibration can be prevented, and the brazing material 6 does not hide the second stamped portion 4, so that the visibility of the second stamped portion 4 is improved. Note that the position of the second body portion 2a separated from the brazing end portion 6a is, for example, a distance equivalent to the thickness of the brazing material 6 from the joint portion 2b to the side where the second body portion 2a is provided, It is a spaced position.

次に、第１刻印部３を第１配管部材１に形成する方法について説明する。図４及び図５はそれぞれ、実施の形態１に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図４は、第１配管部材１が拡管加工装置２０に配置された状態を示す正面図であり、図５は、第１配管部材１が拡管加工装置２０に配置された状態を示す側面図である。図４及び図５のそれぞれに示すように、拡管加工装置２０は、拡管加工用のマンドレル２２と、マンドレル２２を中心として放射状に設けられた複数の拡管加工治具２１とを有する。なお、拡管加工前は、マンドレル２２が拡管加工装置２０の内部に収納されており、それぞれの拡管加工治具２１の間には隙間が無い状態となっている。 Next, a method for forming the first stamped portion 3 on the first piping member 1 will be described. 4 and 5 are explanatory diagrams showing the manufacturing method of the refrigerant pipe 100 of the air conditioner according to Embodiment 1, respectively. 4 is a front view showing a state in which the first piping member 1 is arranged in the tube expanding device 20, and FIG. 5 is a side view showing a state in which the first piping member 1 is arranged in the tube expanding device 20. FIG. be. As shown in FIGS. 4 and 5, the tube expansion device 20 has a tube expansion mandrel 22 and a plurality of tube expansion jigs 21 radially provided around the mandrel 22 . Before the tube expansion, the mandrel 22 is housed inside the tube expansion device 20, and there is no gap between the tube expansion jigs 21. As shown in FIG.

第１配管部材１に増径部１ｂを設ける場合、拡管加工装置２０の拡管加工治具２１に、第１配管部材１を差し込み、マンドレル２２を拡管加工装置２０から突出させる。そして、拡管加工治具２１が、マンドレル２２を中心として、第１配管部材１が広がる方向、つまり、第１配管部材１の径方向外側に向かう方向に広がる。このようにして、第１配管部材１が径方向外側に押し広げられ、増径部１ｂ及び接続部１ｃが形成される。 When providing the first piping member 1 with the increased diameter portion 1 b , the first piping member 1 is inserted into the tube expansion jig 21 of the tube expansion device 20 and the mandrel 22 is protruded from the tube expansion device 20 . Then, the tube expanding jig 21 spreads around the mandrel 22 in the direction in which the first piping member 1 spreads, that is, in the direction toward the radially outer side of the first piping member 1 . In this manner, the first piping member 1 is expanded radially outward to form the increased diameter portion 1b and the connecting portion 1c.

さらに、図４に示すように、拡管加工装置２０には、例えば、拡管加工治具２１の上方等、拡管加工治具２１の外周側にマーキング治具３０が設けられている。また、マーキング治具３０は凸部３１を有しており、凸部３１は、冷媒配管１００の軸中心、つまり、マンドレルの中心に向かって突出している。そして、第１配管部材１の拡管加工時に、第１配管部材１が径方向外側に押し広げられて増径部１ｂ及び接続部１ｃが形成されるとともに、増径部１ｂが凸部３１に押し付けられ、第１刻印部３が増径部１ｂの外表面に形成される。 Furthermore, as shown in FIG. 4 , the tube expanding device 20 is provided with a marking jig 30 on the outer peripheral side of the tube expanding jig 21 , such as above the tube expanding jig 21 . Moreover, the marking jig 30 has a convex portion 31, and the convex portion 31 protrudes toward the axial center of the refrigerant pipe 100, that is, the center of the mandrel. When the first piping member 1 is expanded, the first piping member 1 is expanded radially outward to form the increased diameter portion 1b and the connection portion 1c, and the increased diameter portion 1b is pressed against the convex portion 31. A first stamped portion 3 is formed on the outer surface of the increased diameter portion 1b.

次に、第２刻印部４を第２配管部材２に形成する方法について説明する。図６及び図７はそれぞれ、実施の形態１に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図６は、第２配管部材２の曲げ加工の工程を示す断面図であり、図７は、図６におけるＡ－Ａ断面を示す断面図である。図６に示すように、曲げ加工には、曲げ加工装置４０と配管径と同程度のＲ部６１を有する曲げ半径成型治具６０と、中実丸型の曲げ加工用のマンドレル５０と、配管押さえ治具７０が用いられる。 Next, a method for forming the second stamped portion 4 on the second piping member 2 will be described. 6 and 7 are explanatory diagrams showing the manufacturing method of the refrigerant pipe 100 of the air conditioner according to Embodiment 1, respectively. FIG. 6 is a cross-sectional view showing the process of bending the second piping member 2, and FIG. 7 is a cross-sectional view showing the AA cross section in FIG. As shown in FIG. 6, for bending, a bending device 40, a bending radius shaping jig 60 having an R portion 61 approximately equal to the pipe diameter, a solid round mandrel 50 for bending, and a pipe A holding jig 70 is used.

曲げ加工について説明する。図示は省略するが、まず、曲げ加工前の直管状態の第２配管部材２に対し、第２配管部材２の曲げ位置に曲げ半径成型治具のＲ部６１を接触させて配置する。次に、曲げ加工時に第２配管部材２が楕円形等に変形をしないよう、第２配管部材２の内部における曲げ位置まで、マンドレル５０を差し込む。そして、配管押さえ治具７０で第２配管部材２が曲げ加工時に円周方向に動かないよう押さえ、直管状態の第２配管部材２に平行に配置した曲げ加工装置４０を任意の角度まで第２配管部材２に荷重を加えながら移動することで、曲げが形成される。 Bending will be described. Although illustration is omitted, first, the R portion 61 of the bending radius forming jig is placed in contact with the bending position of the second piping member 2 in a straight pipe state before bending. Next, the mandrel 50 is inserted into the inside of the second piping member 2 up to the bending position so that the second piping member 2 is not deformed into an elliptical shape or the like during bending. Then, the pipe holding jig 70 holds the second pipe member 2 so that it does not move in the circumferential direction during bending, and the bending device 40 arranged parallel to the second pipe member 2 in the straight pipe state is bent up to an arbitrary angle. Bending is formed by moving while applying load to 2 piping members 2. As shown in FIG.

さらに、図７に示すように、第２配管部材２の外周側には、配管押さえ治具７０が設けられている。配管押さえ治具７０は凸部７１を有しており、凸部７１は、冷媒配管１００の軸中心、つまり、マンドレル５０の中心に向かって突出している。そして、第２配管部材２の曲げ加工時に、直管状態の第２配管部材２が曲げ加工装置４０で曲げられる工程において、曲げ半径成型治具６０の円中心を軸としたモーメント力が発生する。そして、発生したモーメント力により第２配管部材２が凸部７１に押し付けられることで、第２刻印部４が形成される。 Furthermore, as shown in FIG. 7 , a pipe holding jig 70 is provided on the outer peripheral side of the second pipe member 2 . The pipe holding jig 70 has a convex portion 71 , and the convex portion 71 protrudes toward the axial center of the refrigerant pipe 100 , that is, the center of the mandrel 50 . When the second piping member 2 is bent, a moment force about the center of the circle of the bending radius forming jig 60 is generated in the step of bending the straight second piping member 2 by the bending device 40 . . Then, the second stamped portion 4 is formed by pressing the second piping member 2 against the convex portion 71 by the generated moment force.

このように、冷媒配管１００は、第１本体部１ａと、第１本体部１ａの外径よりも大きい外径を有し第１本体部１ａの端部に設けられた増径部１ｂとを有する第１配管部材１と、第２本体部２ａと、第２本体部２ａの端部に設けられ、第１配管部材１の増径部１ｂに挿入された接合部２ｂとを有する第２配管部材２と、を備え、第１配管部材１は、増径部１ｂの外表面に第１刻印部３が形成され、第２配管部材２は、第２本体部２ａの外表面に第２刻印部４が形成され、第１刻印部３及び第２刻印部４が形成された位置が軸方向に一致した状態で、増径部１ｂと接合部２ｂとの間に充填されたろう材６により接合されているものである。このようにすると、第１配管部材１と第２配管部材２との位置決めのための他の部材を設けることが不要となり、第１配管部材１と第２配管部材２との位置決めを行えるため、製造コストを削減しながら、配管部材の位置決めの作業性を向上する。 Thus, the refrigerant pipe 100 includes the first main body portion 1a and the increased diameter portion 1b having an outer diameter larger than the outer diameter of the first main body portion 1a and provided at the end of the first main body portion 1a. a first piping member 1 having a The first piping member 1 has a first marking portion 3 formed on the outer surface of the increased diameter portion 1b, and the second piping member 2 has a second marking portion 3 on the outer surface of the second body portion 2a. A portion 4 is formed, and in a state in which the positions where the first stamped portion 3 and the second stamped portion 4 are formed are aligned in the axial direction, the increased diameter portion 1b and the joint portion 2b are joined by the brazing material 6 filled between them. It is what is done. By doing so, it becomes unnecessary to provide another member for positioning the first piping member 1 and the second piping member 2, and the positioning of the first piping member 1 and the second piping member 2 can be performed. To improve workability of positioning a piping member while reducing manufacturing cost.

なお、本実施の形態において、第１刻印部３の深さは、第１配管部材１の増径部１ｂの厚みに対して１割以上とする例について説明したが、第１刻印部３の深さは、第１配管部材１の増径部１ｂの厚みに対して３割未満とすると好ましい。また、第２刻印部４の深さについても、第２配管部材２の第２本体部２ａの厚みに対して１割以上とする例について説明したが、第２刻印部４の深さは、第２配管部材２の第２本体部２ａの厚みに対して３割未満とすると好ましい。このようにすると、第１配管部材１の増径部１ｂ及び第２配管部材２の第２本体部２ａの強度低下を防止できる。 In this embodiment, an example in which the depth of the first stamped portion 3 is 10% or more of the thickness of the increased diameter portion 1b of the first piping member 1 has been described. The depth is preferably less than 30% of the thickness of the increased diameter portion 1 b of the first piping member 1 . Also, the depth of the second stamped portion 4 has been described as 10% or more of the thickness of the second main body portion 2a of the second piping member 2, but the depth of the second stamped portion 4 is The thickness of the second main body portion 2a of the second piping member 2 is preferably less than 30%. By doing so, it is possible to prevent strength reduction of the increased diameter portion 1b of the first piping member 1 and the second main body portion 2a of the second piping member 2 .

また、第１刻印部３及び第２刻印部４の形状により、作業者が接合する順番を認識できるように構成してもよい。例えば、第１刻印部３及び第２刻印部４を、第１配管部材１及び第２配管部材２を接合する順番に対応した形状とすれば、作業者は配管の接合工程において、複数ある配管部材のうち、いずれの配管部材を接合する必要があるかを認識できる。 Further, the shapes of the first stamped portion 3 and the second stamped portion 4 may be configured so that the operator can recognize the joining order. For example, if the first stamped portion 3 and the second stamped portion 4 are formed in a shape corresponding to the order in which the first piping member 1 and the second piping member 2 are joined, the worker can easily perform the joining process of the plurality of pipes. It is possible to recognize which piping member needs to be joined among the members.

実施の形態２．
本実施の形態における空気調和機の冷媒配管１００は、第１刻印部３及び第２刻印部４が、接合時に平面視において接するという点が実施の形態１と異なる。実施の形態１と同じ構成要素には同じ符号を付し、その説明を省略する。 Embodiment 2.
Refrigerant pipe 100 for an air conditioner according to the present embodiment differs from Embodiment 1 in that the first stamped portion 3 and the second stamped portion 4 are in contact with each other in plan view when joined. The same reference numerals are given to the same components as in the first embodiment, and the description thereof is omitted.

図８は、実施の形態２に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図８には、第１配管部材１に第２配管部材２を挿入する工程を示している。図８に示すように、第１刻印部３を増径部１ｂにおける第２配管部材２が設けられた側の端部に形成され、第２刻印部４を第２本体部２ａにおける第１配管部材１が設けられた側の端部に形成されている。すなわち、第１刻印部３における第２配管部材２が設けられた側の端部は、増径部１ｂの第２配管部材２が設けられた側の端部に到達している。また、第２刻印部４における第１配管部材１が設けられた側の端部は、第２本体部２ａにおける第１配管部材１が設けられた側の端部、すなわち接合部２ｂに到達している FIG. 8 is an explanatory diagram showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to the second embodiment. FIG. 8 shows the process of inserting the second piping member 2 into the first piping member 1 . As shown in FIG. 8, the first stamped portion 3 is formed at the end of the increased diameter portion 1b on the side where the second pipe member 2 is provided, and the second stamped portion 4 is formed at the first pipe in the second body portion 2a. It is formed at the end on the side where the member 1 is provided. That is, the end of the first stamped portion 3 on the side where the second piping member 2 is provided reaches the end of the increased diameter portion 1b on the side where the second piping member 2 is provided. In addition, the end of the second stamped portion 4 on the side where the first piping member 1 is provided reaches the end of the second body portion 2a on the side where the first piping member 1 is provided, that is, the joint portion 2b. ing

図９は、実施の形態２に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図９には、第１配管部材１と第２配管部材２とを接合した状態における断面図を示している。上述したように、第１刻印部３が増径部１ｂにおける第２配管部材が設けられた側の端部に増径部１ｂに形成され、第２刻印部４が第２本体部２ａにおける第１配管部材１が設けられた側の端部に形成されているため、接合部２ｂを挿入した後、第１刻印部３及び第２刻印部４は平面視において接する。このようにすると、作業者は、第１配管部材１と第２配管部材２とを組付ける際、第１刻印部３と第２刻印部４とが接すれば、第２配管部材２が第１配管部材１に適切に挿入されたことを把握できる。これにより、第１配管部材1と第２配管部材2とを組付ける工程の作業性が向上する。 FIG. 9 is an explanatory diagram showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to the second embodiment. FIG. 9 shows a cross-sectional view of the state in which the first piping member 1 and the second piping member 2 are joined. As described above, the first stamped portion 3 is formed on the increased diameter portion 1b at the end portion of the increased diameter portion 1b on the side where the second piping member is provided, and the second stamped portion 4 is formed on the second body portion 2a. Since it is formed at the end on the side where 1 piping member 1 is provided, the first stamped portion 3 and the second stamped portion 4 are in contact with each other in plan view after the joint portion 2b is inserted. In this way, when the worker assembles the first piping member 1 and the second piping member 2, if the first stamped portion 3 and the second stamped portion 4 are in contact with each other, the second piping member 2 will be the first piping member. It can be grasped that it has been properly inserted into the piping member 1 . Thereby, the workability of the process of assembling the first piping member 1 and the second piping member 2 is improved.

さらに、図９に示すように、第１刻印部３及び第２刻印部４は、ろう付け作業時にろう材６で覆われるよう、長さは配管部材の厚み程度とすると好ましい。第１刻印部３及び第２刻印部４をろう材６で覆うことで、応力拡大係数を低下させ、長期振動下での疲労破壊を防ぐことができる。 Further, as shown in FIG. 9, the length of the first stamped portion 3 and the second stamped portion 4 is preferably about the thickness of the piping member so that they are covered with the brazing material 6 during the brazing operation. By covering the first stamped portion 3 and the second stamped portion 4 with the brazing filler metal 6, the stress intensity factor can be lowered and fatigue fracture under long-term vibration can be prevented.

なお、図示は省略するが、本実施の形態の第１配管部材１の第１刻印部３と、第２配管部材２の第２刻印部４とは、実施形態１における、拡管加工に用いる凸部３１及び曲げ加工に用いる凸部７１の位置を変更して形成すればよい。 Although illustration is omitted, the first stamped portion 3 of the first piping member 1 and the second stamped portion 4 of the second piping member 2 of the present embodiment are the convex portions used for tube expansion in the first embodiment. It may be formed by changing the positions of the portion 31 and the convex portion 71 used for bending.

実施の形態３．
本実施の形態における空気調和機の冷媒配管１００は、第１刻印部３と第２刻印部４とが、切り欠きではなく印字により構成される点が実施の形態１と異なる。実施の形態１と同じ構成要素には同じ符号を付し、その説明を省略する。 Embodiment 3.
Refrigerant pipe 100 for an air conditioner according to the present embodiment differs from Embodiment 1 in that first stamped portion 3 and second stamped portion 4 are formed by printing instead of notching. The same reference numerals are given to the same components as in the first embodiment, and the description thereof is omitted.

まず、第１刻印部３を第１配管部材１に形成する方法について説明する。図１０は、実施の形態３に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図１０は、第１配管部材１が拡管加工装置２０に配置された状態を示す側面図である。本実施の形態の拡管加工装置２０における拡管加工用のマーキング治具３０は、印字治具設置凹部３２と、印字治具３３と、ばね部材３４とを有する。 First, a method for forming the first stamped portion 3 on the first piping member 1 will be described. 10A and 10B are explanatory diagrams showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to Embodiment 3. FIG. FIG. 10 is a side view showing a state in which the first piping member 1 is arranged in the tube expanding device 20. FIG. A marking jig 30 for tube expansion in the tube expansion apparatus 20 of the present embodiment has a printing jig installation recess 32 , a printing jig 33 , and a spring member 34 .

印字治具３３は、マーキング治具３０において、拡管加工装置２０のマンドレル２２が設けられた側に配置されており、ばね部材３４の一方の端部（図１０における下方側の端部）と固定されている。また、ばね部材３４の他方の端部（図１０における上方側の端部）は、印字治具設置凹部３２と固定されている。そして、印字治具３３は、印字治具３３の少なくとも一部が、マンドレル２２が設けられた側に印字治具設置凹部３２から突出した状態で、印字治具設置凹部３２に収納されている。なお、ばね部材３４についても、印字治具設置凹部３２に収納されている。 The printing jig 33 is arranged in the marking jig 30 on the side where the mandrel 22 of the tube expanding device 20 is provided, and is fixed to one end of the spring member 34 (the end on the lower side in FIG. 10). It is The other end of the spring member 34 (upper end in FIG. 10) is fixed to the printing jig installation recess 32 . The printing jig 33 is housed in the printing jig installation recess 32 in a state in which at least part of the printing jig 33 protrudes from the printing jig installation recess 32 to the side where the mandrel 22 is provided. The spring member 34 is also accommodated in the printing jig installation recess 32 .

拡管加工の工程において、拡管加工治具２１が、第１配管部材１の径方向外側に向かう方向に広がり、第１配管部材１が径方向外側に押し広げられて増径部１ｂが形成される。そして、拡管加工で増径部１ｂが形成されるとともに、増径部１ｂが印字治具３３に押し付けられることで、印字治具３３により第１刻印部３が形成される。ここで、増径部１ｂが印字治具３３に押し付けられたとしても、ばね部材３４が圧縮するため、印字治具３３及び第１配管部材１に負荷をかけることなく第１刻印部３を形成できる。 In the tube expansion process, the tube expansion jig 21 spreads radially outward of the first piping member 1, and the first piping member 1 is expanded radially outward to form the increased diameter portion 1b. . Then, the increased diameter portion 1 b is formed by tube expansion, and the increased diameter portion 1 b is pressed against the printing jig 33 , thereby forming the first stamped portion 3 by the printing jig 33 . Here, even if the increased diameter portion 1b is pressed against the printing jig 33, the spring member 34 is compressed, so that the first marking portion 3 is formed without applying a load to the printing jig 33 and the first piping member 1. can.

次に、第２刻印部４を第２配管部材２に形成する方法について説明する。図１１は、実施の形態３に係る空気調和機の冷媒配管１００の製造方法を示す説明図である。図１１は、第２配管部材２の曲げ加工の工程を示す断面図である。図１１に示すように、第２配管部材２の曲げ加工には、曲げ加工装置４０が用いられる。また、曲げ加工において、配管径と同程度のＲ部６１を有する曲げ半径成形治具６０と、曲げ加工用のマンドレル５０と、配管押さえ治具７０とが用いられる。 Next, a method for forming the second stamped portion 4 on the second piping member 2 will be described. 11A and 11B are explanatory diagrams showing a method for manufacturing the refrigerant pipe 100 of the air conditioner according to Embodiment 3. FIG. 11A and 11B are cross-sectional views showing the process of bending the second piping member 2. FIG. As shown in FIG. 11 , a bending device 40 is used for bending the second piping member 2 . In the bending process, a bending radius forming jig 60 having an R portion 61 approximately equal to the pipe diameter, a mandrel 50 for bending, and a pipe holding jig 70 are used.

本実施の形態の配管押さえ治具７０は、印字治具設置凹部７２と、印字治具７３と、ばね部材７４とを有する。印字治具７３は、配管押さえ治具７０において、マンドレル５０が設けられた側に設けられており、ばね部材７４の一方の端部（図１１中右方側の端部）と固定されている。また、ばね部材７４の他方の端部は、印字治具設置凹部７２に固定されている。そして、印字治具７３は、印字治具７３の少なくとも一部が、マンドレル５０が設けられた側に、印字治具設置凹部７２から突出した状態で、印字治具設置凹部７２に収納されている。なお、ばね部材７４についても、印字治具設置凹部７２に収納されている。 The pipe holding jig 70 of the present embodiment has a printing jig installation recess 72 , a printing jig 73 , and a spring member 74 . The printing jig 73 is provided on the side of the pipe holding jig 70 on which the mandrel 50 is provided, and is fixed to one end of the spring member 74 (the end on the right side in FIG. 11). . The other end of the spring member 74 is fixed to the printing jig installation recess 72 . The printing jig 73 is housed in the printing jig installation recess 72 in a state in which at least part of the printing jig 73 protrudes from the printing jig installation recess 72 on the side where the mandrel 50 is provided. . Note that the spring member 74 is also accommodated in the printing jig installation recess 72 .

曲げ加工の工程において、直管状態の第２配管部材２が曲げ加工装置４０で曲げられる際に、円形形状である曲げ半径成型治具６０の円中心を軸としたモーメントにより第２配管部材２に曲げが形成される。そして、第２配管部材２に曲げが形成されるとともに、第２配管部材２が印字治具７３に押し付けられることで、第２刻印部４が形成される。ここで、第２配管部材２が印字治具７３に押し付けられたとしても、ばね部材７４が圧縮するため、印字治具７３及び第２配管部材２に負荷をかけることなく第２刻印部４を形成できる。 In the bending process, when the straight second piping member 2 is bent by the bending device 40, the second piping member 2 is bent by a moment about the circle center of the circular bending radius forming jig 60. A bend is formed in the Then, a bend is formed in the second piping member 2 and the second piping member 2 is pressed against the printing jig 73 to form the second stamped portion 4 . Here, even if the second piping member 2 is pressed against the printing jig 73 , since the spring member 74 is compressed, the second marking portion 4 can be moved without applying a load to the printing jig 73 and the second piping member 2 . can be formed.

このように、第１刻印部３及び第２刻印部４を印字により構成すると、第１刻印部３及び第２刻印部４が冷媒配管１００の疲労破壊の起点とならず、より品質を安定することができる。 In this way, when the first stamped portion 3 and the second stamped portion 4 are configured by printing, the first stamped portion 3 and the second stamped portion 4 do not become the starting point of fatigue fracture of the refrigerant pipe 100, and the quality is further stabilized. be able to.

なお、本実施の形態において、印字治具３３及びばね部材３４を用いて、第１刻印部３を形成する例について説明したが、実施の形態１で説明したマーキング治具３０の凸部３１を、塗料が塗布されたゴム等の弾性部材、又はスポンジ材で構成して、第１刻印部３を形成してもよい。このようにすると、第１配管部材１の拡管加工時に、増径部１ｂが凸部３１に押し付けられたとしても、弾性部材、又はスポンジ材で構成された凸部３１が圧縮変形するため、第１配管部材１に負荷をかけることなく第１刻印部３を形成できる。 In the present embodiment, an example in which the first stamping portion 3 is formed using the printing jig 33 and the spring member 34 has been described. Alternatively, the first stamping portion 3 may be formed of an elastic member such as rubber coated with paint or a sponge material. With this configuration, even if the increased diameter portion 1b is pressed against the convex portion 31 during pipe expansion processing of the first piping member 1, the convex portion 31 made of an elastic member or a sponge material is compressed and deformed. 1 The first stamped portion 3 can be formed without applying a load to the piping member 1 .

また、第２刻印部４についても同様に、実施の形態１で説明した配管押さえ治具７０の凸部７１を、塗料が塗布されたゴム等の弾性部材、又はスポンジ材で構成して、第２刻印部４を形成してもよい。このようにすると、第２配管部材２の曲げ加工時に、第２配管部材２が凸部７１に押し付けられたとしても、弾性部材で構成された凸部７１が圧縮変形するため、第２配管部材２に負荷をかけることなく第２刻印部４を形成できる。このように、第１刻印部３及び第２刻印部４を印字により構成すると、第１刻印部３及び第２刻印部４が冷媒配管１００の疲労破壊の起点とならず、より冷媒配管１００の品質を安定することができる。 Similarly, for the second stamped portion 4, the convex portion 71 of the pipe holding jig 70 described in the first embodiment is made of an elastic member such as rubber coated with paint or a sponge material. Two stamped portions 4 may be formed. With this configuration, even if the second piping member 2 is pressed against the projections 71 during the bending process of the second piping member 2, the projections 71 made of the elastic member are compressed and deformed. The second stamped portion 4 can be formed without applying a load to 2. In this way, when the first stamped portion 3 and the second stamped portion 4 are formed by printing, the first stamped portion 3 and the second stamped portion 4 do not become the starting point of fatigue fracture of the refrigerant pipe 100, and the refrigerant pipe 100 becomes more stable. Quality can be stabilized.

なお、実施の形態１～３において、第１刻印部３及び第２刻印部４の形状は任意である。例えば、第１刻印部３及び第２刻印部４の形状を、円形、四角形等の凹型、又は十字形のスリット型等としてもよい。 In Embodiments 1 to 3, the shapes of the first stamped portion 3 and the second stamped portion 4 are arbitrary. For example, the shape of the first stamped portion 3 and the second stamped portion 4 may be a recessed shape such as a circle or square, or a cross-shaped slit shape.

また、本明細書中に開示する各実施の形態は、その範囲内において、各実施の形態を自由に組み合わせることが可能であり、各実施の形態を適宜、変形、省略することが可能である。なお、本明細書中に開示する冷媒配管１００は、空気調和機だけでなく機械全般の配管に適用可能である。 In addition, each embodiment disclosed in this specification can be freely combined within its scope, and each embodiment can be modified or omitted as appropriate. . Note that the refrigerant pipe 100 disclosed in this specification is applicable not only to air conditioners but also to pipes for machines in general.

１ 第１配管部材、１ａ 第１本体部、１ｂ 増径部、１ｃ 接続部、２ 第２配管部材、２ａ 第２本体部、２ｂ 接合部、３ 第１刻印部、４ 第２刻印部、５ 軸、６ ろう材、６ａ ろう付け端部、２０ 拡管加工装置、２１ 拡管加工治具、２２、５０ マンドレル、３０ マーキング治具、３１、７１ 凸部、４０ 曲げ加工装置、６０ 曲げ半径成形治具、６１ Ｒ部、７０ 配管押さえ治具、３２、７２ 印字治具設置凹部、３３、７３ 印字治具、３４、７４ ばね部材。 REFERENCE SIGNS LIST 1 first piping member 1a first body portion 1b increased diameter portion 1c connection portion 2 second piping member 2a second body portion 2b joint portion 3 first stamped portion 4 second stamped portion 5 Shaft 6 Brazing material 6a Brazing end 20 Tube expanding device 21 Tube expanding jig 22, 50 Mandrel 30 Marking jig 31, 71 Projection 40 Bending device 60 Bending radius forming jig , 61 R section, 70 piping holding jig, 32, 72 printing jig installation recess, 33, 73 printing jig, 34, 74 spring member.

Claims (9)

第１本体部と、前記第１本体部の外径よりも大きい外径を有し前記第１本体部の端部に設けられた増径部とを有する第１配管部材と、
第２本体部と、前記第２本体部の端部に設けられ、前記第１配管部材の前記増径部に挿入された接合部とを有する第２配管部材と、を備え、
前記第１配管部材は、前記増径部の外表面に第１刻印部が形成され、
前記第２配管部材は、前記第２本体部の外表面に第２刻印部が形成され、
前記第１刻印部及び前記第２刻印部が形成された位置は、前記第１配管部材及び前記第２配管部材の軸方向に一致しており、
前記増径部及び前記接合部の間には、ろう材が充填されている
ことを特徴とする空気調和機の冷媒配管。 a first piping member having a first main body and an increased diameter portion having an outer diameter larger than the outer diameter of the first main body and provided at an end of the first main body;
a second piping member having a second main body and a joint portion provided at an end of the second main body and inserted into the increased diameter portion of the first piping member;
The first piping member has a first stamped portion formed on the outer surface of the increased diameter portion,
The second piping member has a second stamped portion formed on the outer surface of the second main body,
The positions where the first stamped portion and the second stamped portion are formed are aligned with the axial direction of the first piping member and the second piping member,
A refrigerant pipe for an air conditioner, wherein a brazing material is filled between the increased diameter portion and the joint portion. 前記第１刻印部における前記第２配管部材が設けられた側の端部は、前記増径部の前記第２配管部材が設けられた側の端部に到達し、
前記第２刻印部における前記第１配管部材が設けられた側の端部は、前記第２本体部における前記第１配管部材が設けられた側の端部に到達している
ことを特徴とする請求項１に記載の空気調和機の冷媒配管。 The end of the first stamped portion on the side where the second piping member is provided reaches the end of the increased diameter portion on the side where the second piping member is provided,
The end of the second marking portion on the side where the first piping member is provided reaches the end of the second main body on the side where the first piping member is provided. Refrigerant piping for an air conditioner according to claim 1. 前記第２刻印部は、前記ろう材により外表面が覆われている
ことを特徴とする請求項１又は請求項２に記載の空気調和機の冷媒配管。 3. The refrigerant pipe for an air conditioner according to claim 1, wherein the outer surface of the second stamped portion is covered with the brazing material. 前記第１刻印部は、前記増径部の外表面を切り欠いて設けられ、
前記第２刻印部は、前記第２本体部の外表面を切り欠いて設けられている
ことを特徴とする請求項１から請求項３のいずれか一項に記載の空気調和機の冷媒配管。 The first stamped portion is provided by notching the outer surface of the increased diameter portion,
The refrigerant pipe for an air conditioner according to any one of claims 1 to 3, wherein the second stamped portion is provided by notching an outer surface of the second body portion. 前記第１刻印部は、前記増径部の外表面に印字されて設けられ、
前記第２刻印部は、前記第２本体部に印字されて設けられている
ことを特徴とする請求項１から請求項３のいずれか一項に記載の空気調和機の冷媒配管。 The first stamped portion is provided by being printed on the outer surface of the increased diameter portion,
The refrigerant pipe for an air conditioner according to any one of claims 1 to 3, wherein the second marking portion is provided by being printed on the second body portion. 熱交換器、圧縮機、及び膨張弁を内部に収納した室外機と、
請求項１から請求項５のいずれか一項に記載の冷媒配管と、を備え、
前記熱交換器、前記圧縮機、及び前記主膨張弁が前記冷媒配管により接続されている
ことを特徴とする空気調和機。 an outdoor unit containing a heat exchanger, a compressor, and an expansion valve;
A refrigerant pipe according to any one of claims 1 to 5,
An air conditioner, wherein the heat exchanger, the compressor, and the main expansion valve are connected by the refrigerant pipe. 第１配管部材が有する第１本体部の端部に、前記第１本体部の外径よりも大きい外径を有する増径部を形成する工程と、
前記第１配管部材の前記増径部の外表面に、第１刻印部を形成する工程と、
第２配管部材が有する第２本体部の外表面に、第２刻印部を形成する工程と、
前記第１配管部材の前記増径部に、前記第２配管部材が有する、前記第２本体部の端部に設けられた接合部を挿入する工程と、
前記第１刻印部及び前記第２刻印部を、前記第１配管部材及び前記第２配管部材の軸方向において一致させる工程と、
前記第１配管部材の前記増径部と、前記第２配管部材の前記接合部との間にろう材を流入させ、前記第１配管部材と前記第２配管部材とを接合する工程と
を備えた空気調和機の冷媒配管の製造方法。 A step of forming an increased diameter portion having an outer diameter larger than the outer diameter of the first body portion at the end portion of the first body portion of the first piping member;
forming a first stamped portion on the outer surface of the increased diameter portion of the first piping member;
forming a second stamped portion on the outer surface of the second body portion of the second piping member;
a step of inserting a joining portion provided at an end portion of the second body portion of the second piping member into the increased diameter portion of the first piping member;
A step of matching the first stamped portion and the second stamped portion in the axial direction of the first piping member and the second piping member;
a step of joining the first piping member and the second piping member by flowing a brazing material between the increased diameter portion of the first piping member and the joining portion of the second piping member. A method for manufacturing a refrigerant pipe for an air conditioner. 前記第１配管部材の前記増径部の外表面に、前記第１刻印部を形成する工程は、前記増径部の外表面を切り欠いて前記第１刻印部を形成する工程であり、
前記第２配管部材の前記第２本体部の外表面に、前記第２刻印部を形成する工程は、前記第２本体部の外表面を切り欠いて前記第２刻印部を形成する工程である
ことを特徴とする請求項７に記載の空気調和機の冷媒配管の製造方法。 The step of forming the first stamped portion on the outer surface of the increased diameter portion of the first piping member is a step of notching the outer surface of the increased diameter portion to form the first stamped portion,
The step of forming the second stamped portion on the outer surface of the second body portion of the second piping member is a step of notching the outer surface of the second body portion to form the second stamped portion. 8. The method for manufacturing a refrigerant pipe for an air conditioner according to claim 7, characterized in that: 前記第１配管部材の前記増径部の外表面に、前記第１刻印部を形成する工程は、前記増径部の外表面に塗料を塗布して前記第１刻印部を形成する工程であり、
前記第２配管部材の前記第２本体部の外表面に、前記第２刻印部を形成する工程は、前記第２本体部の外表面に塗料を塗布して前記第２刻印部を形成する工程である
ことを特徴とする請求項７に記載の空気調和機の冷媒配管の製造方法。 The step of forming the first stamped portion on the outer surface of the increased diameter portion of the first piping member is a step of applying paint to the outer surface of the increased diameter portion to form the first stamped portion. ,
The step of forming the second stamped portion on the outer surface of the second body portion of the second piping member is a step of applying paint to the outer surface of the second body portion to form the second stamped portion. The method for manufacturing a refrigerant pipe for an air conditioner according to claim 7, characterized in that:
JP2021033557A 2021-03-03 2021-03-03 Refrigerant piping for air conditioning unit, air conditioning unit, and manufacturing method for refrigerant piping for air conditioning unit Pending JP2022134436A (en)

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