JP5160792B2 - Air conditioner heat exchanger - Google Patents

Air conditioner heat exchanger Download PDF

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JP5160792B2
JP5160792B2 JP2007002311A JP2007002311A JP5160792B2 JP 5160792 B2 JP5160792 B2 JP 5160792B2 JP 2007002311 A JP2007002311 A JP 2007002311A JP 2007002311 A JP2007002311 A JP 2007002311A JP 5160792 B2 JP5160792 B2 JP 5160792B2
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refrigerant
auxiliary pipe
heat exchanger
pipe
side auxiliary
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健治 芦田
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Sharp Corp
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Description

本発明は、冷凍サイクルを備えた空気調和機の熱交換器に関するものである。   The present invention relates to a heat exchanger for an air conditioner equipped with a refrigeration cycle.

空気調和機の室内ユニットの室内熱交換器においては、冷媒流路の圧力損失を防止するため、蒸発器となる室内熱交換器の手前側で冷媒流路を分岐する。このとき、冷媒が気液二相域となるため、重力や遠心力等の影響を受け、冷媒が均一に流れないことがあるので、熱交換性能や信頼性に問題があった。   In the indoor heat exchanger of the indoor unit of the air conditioner, in order to prevent pressure loss of the refrigerant flow path, the refrigerant flow path is branched on the front side of the indoor heat exchanger serving as an evaporator. At this time, since the refrigerant is in a gas-liquid two-phase region, there is a problem in heat exchange performance and reliability because the refrigerant may not flow uniformly under the influence of gravity or centrifugal force.

これを解決するため、蒸発器となる室内熱交換器の入口側に、冷媒流路を分岐する分流器が設置されているが、据付工事作業時に配管の変形により発生する冷媒分岐特性が低下するおそれがあった。さらに詳述すると、分流器は、設計毎に冷媒の分岐特性を決める突起の位置を決定し、冷媒の偏流を制御していたが、この方法だけでは、冷媒分流器の上流に位置する補助パイプを室内ユニットの設置の際に曲げると、その下流側にある分流器の傾きが変化してしまい、実際の使用状態では設計通りの制御とはなっていなかった。   In order to solve this problem, a flow divider that branches the refrigerant flow path is installed on the inlet side of the indoor heat exchanger that serves as an evaporator, but the refrigerant branching characteristics that are generated by deformation of the piping during the installation work are reduced. There was a fear. More specifically, the flow divider determines the position of the protrusion that determines the branching characteristic of the refrigerant for each design, and controls the drift of the refrigerant. However, with this method alone, the auxiliary pipe located upstream of the refrigerant flow divider is used. When the indoor unit is bent when the indoor unit is installed, the inclination of the shunt on the downstream side of the indoor unit changes, and the actual control is not as designed.

特許文献１では、冷媒分岐特性の低下を防止するため、冷媒分岐用のＵベンドの分流部と室内配管との接続部の近傍にあるバネの上から配管固定具を設置し、この配管固定具を蒸発器の端板に固定させていた。   In Patent Document 1, in order to prevent deterioration of the refrigerant branching characteristic, a pipe fixing tool is installed on a spring near the connecting part between the branching part of the U-bend for refrigerant branching and the indoor pipe, and this pipe fixing tool. Was fixed to the end plate of the evaporator.

また、別の方法として、図３に示すように、蒸発器１００の冷媒入口側において、補助パイプ１０１に直接分流器を設置するのではなく、入口側補助パイプ１０１から熱交換器の冷媒管１０２を往復させた後、分流器１０３であるトライポッドに接続する方法が考えられる。図中、矢印は冷媒の流れを示す。   As another method, as shown in FIG. 3, instead of directly installing a flow divider in the auxiliary pipe 101 on the refrigerant inlet side of the evaporator 100, the refrigerant pipe 102 of the heat exchanger is connected from the inlet side auxiliary pipe 101. After reciprocating, a method of connecting to the tripod which is the current divider 103 can be considered. In the figure, the arrows indicate the flow of the refrigerant.

この方法によれば、据付工事作業において補助パイプ１０１と熱交換器１００の冷媒管１０２との接続作業時に、補助パイプ１０１を曲げても分流器１０３に直接影響を与えるものではないので、分流器１０３の分流特性が安定する効果がある。
特開平０６−１７４２５６号公報 According to this method, when the auxiliary pipe 101 is connected to the refrigerant pipe 102 of the heat exchanger 100 in the installation work, even if the auxiliary pipe 101 is bent, the shunt 103 is not directly affected. 103 has the effect of stabilizing the shunt characteristics.
Japanese Patent Laid-Open No. 06-174256

上述のように、冷媒分岐特性を改善する手法が種々提案されているが、特許文献１の配管固定具は、配管の変形を防止するために配管固定具という新たな部材が必要となり、その設置スペースが必要となるばかりか、生産コストも高くなるといった欠点があった。   As described above, various methods for improving the refrigerant branching characteristics have been proposed. However, the pipe fixture disclosed in Patent Document 1 requires a new member called a pipe fixture to prevent deformation of the pipe. In addition to requiring space, production costs were high.

一方、図３に示す分流器の設置方法によると、冷媒が分流器に入る前に往復の冷媒管内を通すことになり、その分、冷媒の圧力損失が大きくなり、熱交換性能が劣るおそれがある。   On the other hand, according to the method of installing the flow divider shown in FIG. 3, the refrigerant passes through the reciprocating refrigerant pipe before entering the flow divider, and accordingly, the pressure loss of the refrigerant increases and the heat exchange performance may be deteriorated. is there.

本発明は、上記に鑑み、部品を追加することなく、据付工事作業において入口側の補助パイプを曲げるなどしても安定した分流特性を得ることができる空気調和機の熱交換器の提供を目的としている。   In view of the above, an object of the present invention is to provide a heat exchanger for an air conditioner that can obtain stable shunt characteristics even when the auxiliary pipe on the inlet side is bent in the installation work without adding parts. It is said.

上記目的を達成するため、本発明は、冷媒管が蛇行状に配列されると共に該冷媒管により複数の流路が形成され、かつ前記冷媒管に直交して多数のフィンが設けられ、入口側の冷媒管に冷媒の流路を分岐する分流器が設けられ、該分流器に冷媒を供給する入口側補助パイプが直接接続され、入口側の冷媒管と同じ方向で、分岐された出口側の冷媒管に冷媒を合流させる合流器が設けられ、該合流器に入口側補助パイプよりも大径の出口側補助パイプが接続されてなる空気調和機の熱交換器であって、前記入口側補助パイプは、前記分流器の近くで曲げられる第１の曲げ部と、前記入口側補助パイプの上端部で逆Ｕ字状に折り曲げられた第２の曲げ部との間であって、出口側補助パイプと平行に配列される位置で、かつ前記合流器による合流直後の出口側補助パイプにろう付け固定されたことを特徴とする。 In order to achieve the above object, according to the present invention, the refrigerant pipes are arranged in a meandering manner, a plurality of flow paths are formed by the refrigerant pipes, and a plurality of fins are provided orthogonal to the refrigerant pipes. The refrigerant pipe is provided with a flow divider for branching the refrigerant flow path, and an inlet side auxiliary pipe for supplying the refrigerant is directly connected to the flow divider, and the branch pipe on the outlet side branched in the same direction as the refrigerant pipe on the inlet side. A heat exchanger for an air conditioner, in which a merger for merging refrigerant in a refrigerant tube is provided, and an outlet-side auxiliary pipe having a diameter larger than that of the inlet-side auxiliary pipe is connected to the merger. The pipe is between a first bent portion bent near the shunt and a second bent portion bent in an inverted U shape at the upper end portion of the inlet side auxiliary pipe, and has an outlet side auxiliary portion. in position is pipe and arranged parallel to, and merging by the merging unit linear Wherein the on the outlet side auxiliary pipe is brazed.

上記構成によると、入口側補助パイプを分流器に直接接続しているので、図３に示す配管構成に比べて熱交換効率も良好となる。しかも、入口側補助パイプの分流器近傍部分を出口側補助パイプに固定しているので、入口側補助パイプを曲げる必要があっても、分流特性への影響を抑えることができる。   According to the above configuration, since the inlet side auxiliary pipe is directly connected to the flow divider, the heat exchange efficiency is improved as compared with the piping configuration shown in FIG. Moreover, since the vicinity of the flow divider of the inlet side auxiliary pipe is fixed to the outlet side auxiliary pipe, the influence on the flow dividing characteristics can be suppressed even if the inlet side auxiliary pipe needs to be bent.

また、第１の曲げ部と第２の曲げ部とを設けることで、配管の冷媒流路の上流側の接続側で曲げの応力が加わっても分流器近傍への応力が伝わりにくくし、かつ、第１の曲げ部と第２の曲げ部との間で入口側補助パイプと出口側補助パイプとが平行に配列された位置で両者をろう付け固定しているので、ろう付け作業性が良好となり、安定した固定状態が得られ、分流器による分流特性を維持することができる。In addition, by providing the first bent portion and the second bent portion, even if bending stress is applied on the upstream connection side of the refrigerant flow path of the pipe, the stress near the shunt is not easily transmitted, and Since the inlet side auxiliary pipe and the outlet side auxiliary pipe are brazed and fixed between the first bent part and the second bent part in parallel, the brazing workability is good. Thus, a stable fixed state can be obtained, and the shunt characteristics by the shunt can be maintained.

このような据付工事作業は、室内ユニットと室外ユニットとが分離したセパレート型の空気調和機において、室内ユニットと室外ユニットとの冷媒配管を接続する場合に起こり得る。詳しくは、室内ユニットの左側、右側、後方、下方の四方向に補助パイプを曲げる可能性がある。また、生産時に蒸発器を組み付けたときや、修理時に蒸発器を移動させる必要が生じた場合、作業者によっては補助パイプを曲げることがある。このような場合、分流器の上流側で入口側補助パイプを出口側補助パイプに固定することで、分流器の特性を維持することができる。   Such an installation work may occur when the refrigerant pipes of the indoor unit and the outdoor unit are connected in a separate type air conditioner in which the indoor unit and the outdoor unit are separated. Specifically, there is a possibility that the auxiliary pipe is bent in the four directions of the left side, the right side, the rear side, and the lower side of the indoor unit. Further, when the evaporator is assembled during production or when it becomes necessary to move the evaporator during repair, the auxiliary pipe may be bent depending on the operator. In such a case, the characteristics of the flow divider can be maintained by fixing the inlet side auxiliary pipe to the outlet side auxiliary pipe on the upstream side of the flow divider.

なお、出口側補助パイプは、分岐した冷媒管が合流されて入口側補助パイプよりも大径に形成されるが、この合流直後の出口側補助パイプに入口側補助パイプを固定する。これにより、入口側補助パイプが大径の出口側補助パイプに固定するので、安定した固定状態が得られ、分流特性を維持することができる。   The outlet side auxiliary pipe is formed with a larger diameter than the inlet side auxiliary pipe by joining the branched refrigerant pipes, and the inlet side auxiliary pipe is fixed to the outlet side auxiliary pipe immediately after the merging. As a result, the inlet side auxiliary pipe is fixed to the large-diameter outlet side auxiliary pipe, so that a stable fixed state can be obtained and the diversion characteristics can be maintained.

図１は本実施形態の空気調和機の冷凍サイクル図、図２は室内ユニットの断面図である。   FIG. 1 is a refrigeration cycle diagram of the air conditioner of the present embodiment, and FIG. 2 is a sectional view of an indoor unit.

図に示すように、本発明の空気調和機では、圧縮機１、室外熱交換器２、膨張弁３、室内熱交換器５を順次接続され、冷媒が循環する冷凍サイクルが構成される。   As shown in the figure, in the air conditioner of the present invention, a compressor 1, an outdoor heat exchanger 2, an expansion valve 3, and an indoor heat exchanger 5 are sequentially connected to constitute a refrigeration cycle in which refrigerant circulates.

本実施形態では、冷房運転時の冷凍サイクルのみを図示しているが、さらに、圧縮機１と室外熱交換器２及び室内熱交換器５を接続する部分に四方弁を設け、この四方弁の切替えにより、冷媒の流れを冷房時と逆方向にし、暖房運転を行うことができるようにしてもよい。   In the present embodiment, only the refrigeration cycle during the cooling operation is illustrated, but a four-way valve is further provided in a portion connecting the compressor 1, the outdoor heat exchanger 2 and the indoor heat exchanger 5, and the four-way valve By switching, the flow of the refrigerant may be in the opposite direction to that during cooling so that the heating operation can be performed.

室内熱交換器５は、冷媒の圧力損失を防止するため、その蒸発器として使用される熱交換器の入口側で分流器４により２つの流路に分岐され、分岐後に第１の熱交換部５ａと第２の熱交換部５ｂとをそれぞれ通り、出口側で合流して圧縮機１の吸入側に至る。   The indoor heat exchanger 5 is branched into two flow paths by the flow divider 4 on the inlet side of the heat exchanger used as an evaporator to prevent pressure loss of the refrigerant. 5a and the second heat exchanging section 5b, respectively, merge at the outlet side and reach the suction side of the compressor 1.

冷凍サイクル１の構成要素は、セパレート型の空気調和機においては、室内ユニットと室外ユニットに分離される。室外ユニットには、圧縮機１、室外熱交換器２および膨張弁３が内装される。また、室外熱交換器２に対面して室外ファン（図示略）が配設される。   The components of the refrigeration cycle 1 are separated into an indoor unit and an outdoor unit in a separate type air conditioner. The outdoor unit includes a compressor 1, an outdoor heat exchanger 2, and an expansion valve 3. In addition, an outdoor fan (not shown) is disposed facing the outdoor heat exchanger 2.

一方、室内ユニットには、後ろ側のキャビネット７と前側の前面パネル８とにより形成されたケーシングの内部に室内熱交換器５が内装され、この室内熱交換器５の近傍にクロスフローファン等の室内ファン６（図２参照）が配置される。   On the other hand, in the indoor unit, an indoor heat exchanger 5 is installed inside a casing formed by the rear cabinet 7 and the front panel 8 on the front side, and a cross flow fan or the like is provided in the vicinity of the indoor heat exchanger 5. An indoor fan 6 (see FIG. 2) is arranged.

室内熱交換器５は、冷媒管９が蛇行状に配列されると共に該冷媒管９により複数の流路（本実施形態では２つの流路）が形成され、前記冷媒管９に直交して多数のフィン１１が設けられる。そして、入口側の冷媒管９に冷媒流路を分岐する分流器１０が設けられる。   In the indoor heat exchanger 5, the refrigerant pipes 9 are arranged in a meandering manner, and a plurality of flow paths (two flow paths in the present embodiment) are formed by the refrigerant pipes 9. Fin 11 is provided. And the flow divider 10 which branches a refrigerant | coolant flow path is provided in the refrigerant | coolant pipe | tube 9 of the inlet side.

分流器１０は、逆Ｕ字形のベント管から構成される。ベント管の中心付近にはＴ字形に接続する接続管部１２が形成される。この接続管部１２に冷媒を供給する入口側補助パイプ１３が直接接続される。また、熱交換器５の冷媒管８の出口側は、入口側と同じ方向に形成される。２つの流路を構成する冷媒管８の出口は、熱交換器の端面で合流器１４により合流される。合流器１４には入口側補助パイプ１３よりも大径の出口側補助パイプ１５が接続される。   The shunt 10 is composed of an inverted U-shaped vent pipe. A connecting pipe portion 12 connected in a T shape is formed near the center of the vent pipe. The inlet side auxiliary pipe 13 for supplying the refrigerant is directly connected to the connecting pipe portion 12. Further, the outlet side of the refrigerant pipe 8 of the heat exchanger 5 is formed in the same direction as the inlet side. The outlets of the refrigerant tubes 8 constituting the two flow paths are merged by the merger 14 at the end face of the heat exchanger. An outlet side auxiliary pipe 15 having a diameter larger than that of the inlet side auxiliary pipe 13 is connected to the merger 14.

入口側補助パイプ１３と出口側補助パイプ１５とは、熱交換器５に沿って配列されると共にその上方位置で後側キャビネット７の背面側に沿わせるために湾曲される。そして、入口側補助パイプ１３は、前記湾曲部１６よりも冷媒流路の下流側で出口側補助パイプ１５にろう付け固定される。   The inlet side auxiliary pipe 13 and the outlet side auxiliary pipe 15 are arranged along the heat exchanger 5 and curved so as to be along the back side of the rear cabinet 7 at an upper position thereof. The inlet side auxiliary pipe 13 is brazed and fixed to the outlet side auxiliary pipe 15 on the downstream side of the refrigerant flow path with respect to the curved portion 16.

詳述すると、入口側補助パイプ１３は、その先端がＵ字形のベント管１０の管方向に直交する接続管部１２にＴ字状に接続される。入口側補助パイプ１３の他端部は熱交換器５の室内ファン６側まで引き出され、その後、熱交換器５の室内ファンの側面の近くで曲げられる（第１の曲げ部１６）。その後、入口側補助パイプ１３は、出口側補助パイプ１５と共にフィン１１に沿って配列され、上端部で逆Ｕ字状に折り曲げられた後（第２の曲げ部１７）、後ろ側キャビネット７に沿って下方に引き出される。   More specifically, the inlet side auxiliary pipe 13 is connected in a T shape to the connecting pipe portion 12 whose tip is perpendicular to the pipe direction of the U-shaped vent pipe 10. The other end of the inlet side auxiliary pipe 13 is drawn to the indoor fan 6 side of the heat exchanger 5 and then bent near the side surface of the indoor fan of the heat exchanger 5 (first bent portion 16). Thereafter, the inlet side auxiliary pipes 13 are arranged along the fins 11 together with the outlet side auxiliary pipes 15 and are bent in an inverted U shape at the upper end (second bent part 17), and then along the rear cabinet 7. And pulled down.

そして、入口側補助パイプ１３は、第１の曲げ部１６よりも冷媒流路の上流側で、かつ第２の曲げ部１７よりも下流側に位置する分流器近傍部分で出口側補助パイプ１５にろう付け２０により固定される。   The inlet-side auxiliary pipe 13 is connected to the outlet-side auxiliary pipe 15 at a portion near the flow divider located upstream of the first bent portion 16 in the refrigerant flow path and downstream of the second bent portion 17. It is fixed by brazing 20.

ろう付け部分２０は、第１の曲げ部１６付近であってもよいが、入口側および出口側の両補助パイプ１３，１５が共に平行に配列される位置にろう付けされ、ろう付け作業性を良好にしている。つまり、ろう付け固定は、入口側補助パイプの分流器近傍の第１の曲げ部１６と第２の曲げ部１７との間とされる。   The brazing portion 20 may be in the vicinity of the first bent portion 16, but is brazed at a position where both the inlet side and outlet side auxiliary pipes 13 and 15 are arranged in parallel. Good. That is, the brazing is fixed between the first bent portion 16 and the second bent portion 17 in the vicinity of the flow divider of the inlet side auxiliary pipe.

上記構成において、入口側補助パイプ１３に直接分流器１０が接続された熱交換器５では、入口側補助パイプ１３と出口側補助パイプ１５とを補助パイプ１３の曲げ手前でろう付け等で固定する。そうすると、分流器１０およびその周辺部が動かなくなり、熱交換器の生産時、設置時、修理時などで、補助パイプ１３が動かされても、分流器１０が動かないので、冷媒の分流が変わることがなく、安定した冷房／暖房能力を発揮することができる。   In the above configuration, in the heat exchanger 5 in which the flow divider 10 is directly connected to the inlet side auxiliary pipe 13, the inlet side auxiliary pipe 13 and the outlet side auxiliary pipe 15 are fixed by brazing or the like before the auxiliary pipe 13 is bent. . As a result, the flow divider 10 and its surroundings stop moving, and even if the auxiliary pipe 13 is moved during production, installation, repair, etc. of the heat exchanger, since the flow divider 10 does not move, the flow of refrigerant changes. And stable cooling / heating capability can be achieved.

前記ろう付け固定は、前記入口側補助パイプ１３の前記分流器４の近傍の熱交換器の室内ファン側の近くで曲げられる第１の曲げ部１６と、出口側補助パイプ１５と共にフィン１１に沿って配列され、上端部で逆Ｕ字状に折り曲げられた第２の曲げ部１７とを設けることで、配管の冷媒流路の上流側の接続側で曲げの応力が加わったときに、分流器４近傍への応力が伝わりにくくなる利点がある。   The brazing fixing is performed along the fins 11 together with the first bent portion 16 bent near the indoor fan side of the heat exchanger in the vicinity of the flow divider 4 of the inlet side auxiliary pipe 13 and the outlet side auxiliary pipe 15. When the bending stress is applied on the connection side on the upstream side of the refrigerant flow path of the pipe, the shunt is arranged by providing the second bent portion 17 which is arranged in an inverted U shape at the upper end portion. There is an advantage that the stress to 4 vicinity becomes difficult to be transmitted.

なお、本発明は、上記実施形態に限定されるものではなく、本発明の範囲内で多くの修正・変更を加えることができるのは勿論である。例えば、上記実施形態では、室内熱交換器における補助パイプにろう付けを施したが、室外熱交換器において本発明を適用してもよい。   Note that the present invention is not limited to the above-described embodiment, and it is needless to say that many modifications and changes can be made within the scope of the present invention. For example, in the above embodiment, the auxiliary pipe in the indoor heat exchanger is brazed, but the present invention may be applied to an outdoor heat exchanger.

本実施形態の空気調和機の冷凍サイクル図Refrigeration cycle diagram of the air conditioner of this embodiment 室内ユニットの断面図Cross section of indoor unit 従来の熱交換器の斜視図A perspective view of a conventional heat exchanger

符号の説明Explanation of symbols

１ 圧縮機
２ 室外熱交換器
３ 膨張弁
４ 分流器
５ 室内熱交換器
５ａ 第１の熱交換器
５ｂ 第２の熱交換器
６ 室内ファン
７ キャビネット
８ 前面パネル
９ 冷媒管
１０ 熱交換器
１１ フィン
１２ 接続管部
１３ 入口側補助パイプ
１４ 合流器
１５ 出口側補助パイプ
１６ 第１の曲げ部
１７ 第２の曲げ部 DESCRIPTION OF SYMBOLS 1 Compressor 2 Outdoor heat exchanger 3 Expansion valve 4 Shunt 5 Indoor heat exchanger 5a 1st heat exchanger 5b 2nd heat exchanger 6 Indoor fan 7 Cabinet 8 Front panel 9 Refrigerant pipe 10 Heat exchanger 11 Fin 12 connecting pipe part 13 inlet side auxiliary pipe 14 merger 15 outlet side auxiliary pipe 16 first bent part 17 second bent part

Claims (1)

冷媒管が蛇行状に配列されると共に該冷媒管により複数の流路が形成され、かつ前記冷媒管に直交して多数のフィンが設けられ、入口側の冷媒管に冷媒の流路を分岐する分流器が設けられ、該分流器に冷媒を供給する入口側補助パイプが直接接続され、入口側の冷媒管と同じ方向で、分岐された出口側の冷媒管に冷媒を合流させる合流器が設けられ、該合流器に入口側補助パイプよりも大径の出口側補助パイプが接続されてなる空気調和機の熱交換器であって、
前記入口側補助パイプは、前記分流器の近くで曲げられる第１の曲げ部と、前記入口側補助パイプの上端部で逆Ｕ字状に折り曲げられた第２の曲げ部との間であって、出口側補助パイプと平行に配列される位置で、かつ前記合流器による合流直後の出口側補助パイプにろう付け固定されたことを特徴とする空気調和機の熱交換器。 The refrigerant pipes are arranged in a meandering manner, and a plurality of flow paths are formed by the refrigerant pipes, and a plurality of fins are provided orthogonal to the refrigerant pipes, and the refrigerant flow paths are branched into the refrigerant pipes on the inlet side. A flow divider is provided, and an inlet side auxiliary pipe that supplies the refrigerant to the flow divider is directly connected , and a merger that merges the refrigerant into the branched outlet side refrigerant pipe in the same direction as the inlet side refrigerant pipe is provided. A heat exchanger of an air conditioner in which an outlet side auxiliary pipe having a diameter larger than that of the inlet side auxiliary pipe is connected to the merger ,
The inlet-side auxiliary pipe has a first bent portion which is bent in the vicinity of the flow divider, a between the second bent portion bent in an inverted U-shaped at the upper end of the inlet-side auxiliary pipe A heat exchanger for an air conditioner, wherein the heat exchanger is brazed and fixed to the outlet side auxiliary pipe at a position arranged in parallel with the outlet side auxiliary pipe and immediately after joining by the merger .
JP2007002311A 2007-01-10 2007-01-10 Air conditioner heat exchanger Active JP5160792B2 (en)

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Publication number Priority date Publication date Assignee Title
JP7221468B2 (en) 2020-12-09 2023-02-13 三菱電機株式会社 Free-space optical communication transmitting/receiving terminal and free-space optical communication system

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Publication number Priority date Publication date Assignee Title
JP6079619B2 (en) * 2013-12-27 2017-02-15 ダイキン工業株式会社 Air conditioning indoor unit
KR102018594B1 (en) 2017-06-21 2019-09-05 한국항공우주연구원 Method and apparatus for calibrating antenna gain pattern

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JP3284943B2 (en) * 1997-09-25 2002-05-27 ダイキン工業株式会社 Air conditioner
JP2005106368A (en) * 2003-09-30 2005-04-21 Daikin Ind Ltd Cooling medium distribution mechanism, and air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7221468B2 (en) 2020-12-09 2023-02-13 三菱電機株式会社 Free-space optical communication transmitting/receiving terminal and free-space optical communication system

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