JP3908060B2

JP3908060B2 - Mobile mounted antenna

Info

Publication number: JP3908060B2
Application number: JP2002053690A
Authority: JP
Inventors: 哲也本田; 一成中尾; 政明村上; 伊知郎城川
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-02-28
Filing date: 2002-02-28
Publication date: 2007-04-25
Anticipated expiration: 2022-02-28
Also published as: JP2003258173A

Description

【０００１】
【発明の属する技術分野】
本発明は、移動体搭載用のアンテナに関し、詳しくは、実効的な重力の方向が変わり易い航空機等の移動体に搭載されるアンテナであって、アンテナ素子を制御するモジュールが集熱部材に配設され、このモジュールの熱を前記集熱部材内に設けられたヒートパイプの冷媒の蒸発部位から前記集熱部材の両端側に設けられたヒートパイプの冷媒の凝縮部位に導いてアンテナを冷却する冷却手段を備えた移動体搭載用アンテナに関する。
【０００２】
【従来の技術】
従来の技術として、特開平１１−３１７６１８号公報に掲載されたフェイズドアレイアンテナの冷却手段を、図８及び図９に基づいて説明する。図８はアンテナ素子を省略したアンテナの正面図、図９はヒートパイプの配設状態を示す斜視図である。
図８において、アンテナ２０は、アンテナ２１面に、例えば数十から数千個もの多数のアンテナ素子（図示せず）が並べられて形成されたアンテナ素子群２２を有し、当該アンテナ素子群２２を構成する各アンテナ素子毎に対応させて、当該アンテナ素子の近傍にモジュール２３が配設されている。アンテナ素子はこのモジュール２３によって制御され、その信号が処理されている。
【０００３】
アンテナ素子を制御するモジュール２３は発熱体であり、アンテナ特性はモジュール２３の温度によって比較的大きく変化してしまうため、従来では、各モジュール２３の発熱量を均一にすると共に各モジュール２３に対する放熱特性も均一にして、モジュール群の温度分布を均一に保つ冷却手段を用いて、アンテナ素子群２２の温度分布を均一化して、良好な信号の送受信を可能としていた。
【０００４】
図８及び図９において、モジュール群延いてはアンテナ素子群２２の温度分布を均一化させるアンテナの冷却手段は、次のように構成されていた。
即ち、各モジュール２３を集熱部材としての金属プレート２４に配列し、当該金属プレート２４に集熱されたモジュール２３の熱を、当該金属プレート２４に内設されたヒートパイプ２５（図９）の冷媒の蒸発部位で吸熱して、アンテナ２０の左右外側に設けられたヒートパイプの冷媒の凝縮部位２６、２６にて放熱させる。
前記のヒートパイプ２４に封入された冷媒が凝縮する凝縮部位２６、２６には、ヒートシンク２７や当該ヒートシンク２７に冷却風を送るためのファン２８等が各々配設されている。
【０００５】
図８に示すアンテナ２０において、集熱部材としての金属プレート２４は、アンテナ面２１の中心を通る垂線を境にして、水平方向左右に分けて配設されているため、当該金属プレート２４内のヒートパイプ２５もまたアンテナ２０の中央（垂線）を境にして左右に分かれている。
又、図９に示すヒートパイプ２５は、Ｕ字型のヒートパイプ部分２５Ａと２本の直線型のヒートパイプ部分２５Ｂ、２５Ｃとに分けて描かれているが、Ｕ字型のヒートパイプ部分２５Ａの両端にそれぞれ直線型のヒートパイプ部分２５Ｂ、２５Ｃが接続されて作動する。尚、金属プレート２４は金属材２４ａと２４ｂとの張り合わせである。
【０００６】
【発明が解決しようとする課題】
前記のような従来のアンテナは、一般に安定した設置状態、即ちヒートパイプに封入された冷媒に対して作用する重力の方向が一定に設置されるため、問題なく使用することができる。
しかし、航空機等その設置状態が変化する移動体に搭載する場合には、機体の傾き等の飛行姿勢の変化によって、冷媒に対する実効的な重力の方向（地球の重力加速度と遠心力等が合成された力の作用する方向）が変化してしまう。
他方、ヒートパイプに封入された液状態の冷媒は、当該ヒートパイプ内の蒸発部位と凝縮部位との間を自由に移動できるため、前記のように重力の方向が変化すると、即ち、重力方向において集熱部材内に設けられたヒートパイプの蒸発部位が凝縮部位よりも上になって高低の差が生じると、冷媒が低い方に移動してヒートパイプの凝縮部位に溜まり、当該部位の冷却機能が失われて局所的に集熱部材の温度が上がってしまう。
【０００７】
図８に示す例では、偶然にも、アンテナ面２１の縦中央にて、水平方向左右に集熱部材としての金属プレート２４と金属プレート２４とが、分かれて配置されているが、これでも、図において、仮に時計回り方向にヒートパイプ（金属プレート２４）が傾くと、右側の全てのヒートパイプ２４の冷媒は右側の凝縮部位２６に集まってしまい、金属プレート２４側には必要な冷媒がなくなって、冷却機能が失なわれる。
他方、図において左側の全てのヒートパイプ２４の液状態の冷媒は、各ヒートパイプの蒸発部位の終端側、即ちアンテナ面２１の縦中央側に溜まるため、冷却機能が維持される。
【０００８】
この結果、アンテナ面２１の右半面側領域と左半面側領域との温度差が著しくなって、右半面側のアンテナ素子群と左半面側のアンテナ素子群との双方の特性が大きく異なるため、アンテナ全体の特性が低下し、良好な信号の送受信が不能となってしまう。
このため、従来のこの種のアンテナをそのまま重力の方向が変化する移動体に搭載することができなかった。
【０００９】
本発明は、実効的な重力の方向が変わり易い航空機等の移動体に搭載しても、良好な信号の送受信が可能な冷却手段を備えた移動体搭載用アンテナの提供を目的とする。
【００１０】
【課題を解決するための手段】
本発明は、アンテナ素子を制御するモジュールが集熱部材に配設され、前記モジュールの熱を前記集熱部材内に設けられたヒートパイプの冷媒の蒸発部位から前記集熱部材の両端側に設けられた前記ヒートパイプの冷媒の凝縮部位に導いて、アンテナを冷却する冷却手段を備えた移動体搭載用アンテナにおいて、
両端側に凝縮部位を有し中央側に蒸発部位を有し、蒸発部位の終端を近接させた２本一対のヒートパイプを、当該両ヒートパイプの凝縮部位が前記集熱部材の両端側に各々位置し、両ヒートパイプの蒸発部位が前記集熱部材の全長にわたって熱的に接続された状態に配設し、両ヒートパイプの蒸発部位の終端は前記集熱部材に熱的に接続された別の２本一対のヒートパイプの蒸発部位の終端とは各ヒートパイプの延在方向で異なる位置としたことを内容とする。
【００１２】
又、本発明は、終端は、一本のヒートパイプの途中に設けられた隔壁で冷媒が一方側から他方側に互いに移動しないように仕切られて構成されたことを内容とする。
【００１３】
又、本発明は、一対のヒートパイプの少なくとも何れか一方の蒸発部位と熱的に接続された更に別のヒートパイプを集熱部材内に追加して設けたことを内容とする。
【００１４】
又、本発明は、一対のヒートパイプの蒸発部位又は凝縮部位は、上下方向に平行に配設されたことを内容とする。
【００１５】
又、本発明は、アンテナ素子を制御するモジュールが集熱部材に配設され、前記モジュールの熱を前記集熱部材内に設けられたヒートパイプの冷媒の蒸発部位から前記集熱部材の両端側に設けられたヒートパイプの冷媒の凝縮部位に導いて、アンテナを冷却する冷却手段を備えた移動体搭載用アンテナにおいて、
一方端側に凝縮部位を有し他方端側に蒸発部位を有する２本一対のヒートパイプを、互いの凝縮部位が前記集熱部材の両端側に各々位置し、互いの蒸発部位を前記集熱部材に熱的に接続すると共に、互いの蒸発部位の終端を近接させ、水平状態において、両ヒートパイプの蒸発部位の終端が両ヒートパイプの凝縮部位よりも低く設定し、両ヒートパイプの凝縮部位の蒸発部位を略Ｖ字型に配設したことを内容とする。
【００１６】
【発明の実施の形態】
実施の形態１．
以下、実施の形態１を図１及び図２に基づいて説明する。図１はヒートパイプの配設状態を示す断面図、図２はヒートパイプが左に傾いた状態を示す断面図である。
図１及び図２において、１は一方端側に蒸発部位１ａを他方端側に凝縮部位１ｂを有する第１のヒートパイプ、２もまた同様に、一方端側に蒸発部位２ａを他方端側に凝縮部位２ｂを有する第２のヒートパイプである。３は表面に多数のモジュール（図示せず）が配設された集熱部材である。
前記の蒸発部位１ａ、２ａは、各々前記第１、第２のヒートパイプ１、２に封入された液状態の冷媒４、５が集熱部材３に集熱されたモジュール（図示せず）の熱を吸熱して蒸発する部位であり、凝縮部位１ｂ、２ｂは、前記第１、第２のヒートパイプ１、２の冷媒４、５が前記蒸発部位１ａ、２ａで吸熱した熱を放熱して液状態に凝縮する部位、即ち放熱部である。
【００１７】
第１及び第２のヒートパイプ１、２は、その凝縮部位１ｂ、２ｂが互いに集熱部材３の延在方向の両端外側に各々対称に位置されており、蒸発部位１ａ、２ａは集熱部材３内において、当該集熱部材３の全長（図において左右方向）にわたって平行に延在するように配設されている。
尚、本明細書における平行とは、厳密な意味での平行に限らず、略同方向に向てヒートパイプが延在する状態も含む広い意味で用いる。
【００１８】
これにより、集熱部材３は、その長さ方向（図の左右方向）の全長にわたって、少なくとも何れかのヒートパイプ１、２の冷媒４、５によって吸熱されるので、局所的な高温部を生じることなく、温度が効率よく均一される。
【００１９】
更に、この実施の形態１によれば、第１のヒートパイプ１の凝縮部位１ｂと第２のヒートパイプ２の凝縮部位２ｂとを、集熱部材３を中央にして当該集熱部材３の延在方向の両外側に対称の位置関係で設置することにより、集熱部材３に集熱されたモジュール（図示せず）の熱を、２本の蒸発部位１ａ、２ａの冷媒４、５で効率よく吸熱することができ、しかも、２本のヒートパイプ１、２の動作によって効率よく速やかに、集熱部材３の熱を当該集熱部材３の両側に配設された凝縮部位１ｂ、２ｂに移動させて、外気等に放熱することができる。
【００２０】
又、第１及び第２ヒートパイプ１、２に傾きが無い通常のヒートパイプ動作では、蒸発部位１ａ、２ａの温度がほぼ均一に維持されるため、集熱部材３は内設された蒸発部位１ａ、２ａの長さ方向に沿って温度がほぼ均一となる。その結果、各モジュール延いては各アンテナ素子の温度がほぼ均一に保たれて、良好な信号の送受信ができる。
【００２１】
図２において、第１及び第２のヒートパイプ１、２が、移動体と共に左側に傾いた場合（重力方向からずれた場合のほか遠心力等により冷媒に対する実効的な重力の方向が変化する場合を含む）、第２のヒートパイプ２の液状態の冷媒５は凝縮部位２ｂに移動して滞留するため、蒸発部位２ａでは必要な液状態の冷媒５が枯渇して冷却機能が失われる。
しかし、この実施の形態１では、第１のヒートパイプ１の冷媒４が蒸発部位１ａの終端に液状態で滞留するので、第１のヒートパイプ１に十分な熱処理能力があれば、集熱部材３全体の温度をほぼ均一にさせる冷却機能を維持させることができる。
【００２２】
これとは逆に、第１及び第２のヒートパイプ１、２が、移動体と共に右側に傾いた場合、図示されてはいないが、第１のヒートパイプ１の液状態の冷媒４が凝縮部位１ｂに移動して滞留するため、蒸発部位１ａでは必要な液状態の冷媒４が枯渇して冷却機能が失われる。
しかし、この場合でも、第２のヒートパイプ２の冷媒５が蒸発部位２ａの終端に液状態で滞留するので、第２のヒートパイプ２に十分な熱処理能力があれば、集熱部材３全体の温度をほぼ均一にさせる冷却機能を維持させることができる。
【００２３】
従って、この実施の形態１によれば、ヒートパイプ１、２が左右何れに傾いても、モジュール群延いてはアンテナ素子群の温度を均一な状態に保つことができ、アンテナを正常に機能させることができる。
【００２４】
実施の形態２．
以下、実施の形態２を図３及び図４に基づいて説明する。図３はヒートパイプの配設状態を示す断面図、図４はヒートパイプが左に傾いた状態を示す断面図である。
この実施の形態３は、図３に示す通り、前記実施の形態１における第１のヒートパイプ１と第２のヒートパイプ２との各々の蒸発部位１ａ、２ａの終端を、集熱部材３の内部に止まるように、各々の凝縮部位１ｂ、２ｂ側からの長さを短く形成したものであり、短く形成されたこれらの各蒸発部位１ａ、２ａの終端に対して、各々熱的に接続された状態で、凝縮部位６ｂ、７ｂを有する第３、第４のヒートパイプ６、７の蒸発部位６ａ、７ａの終端を配設して、第１及び第３のヒートパイプ１、６と第２及び第４のヒートパイプ２、７とによる２本一対のヒートパイプラインを平行に形成したものである。
【００２５】
図３に示す例では、計４本のヒートパイプ即ち第１のヒートパイプ１、第２のヒートパイプ２、第３のヒートパイプ６、第４のヒートパイプ７を用いて、２本一対のヒートパイプライン、即ち、第１のヒートパイプ１と第３のヒートパイプ６とによるパイプライン、第２のヒートパイプ２と第４のヒートパイプ７とによるパイプラインが形成されている。
尚、図中の８及び９は第３及び第４のヒートパイプ６、７に封入された液状態の冷媒である。又、これら４本のヒートパイプ１及び６と２及び７の蒸発部位（１ａ及び６ａと２ａ及び７ａ）は、集熱部材３内において平行間隔を保ちつつも、互いに熱的に接続された状態に配設している。又、各々の他方端側の凝縮部位６ｂ、７ｂは集熱部材３の両外側に位置するように設けられている。
【００２６】
前記の第３及び第４のヒートパイプ６、７は、集熱部材３内において、各々蒸発部位６ａ、７ａの終端が、前記第１及び第２のヒートパイプ１、２の蒸発部位１ａ、２ａの終端に対して熱的に接続するように近接されている。
図示の例では、同軸的に突き合わされた第１のヒートパイプ１と第３のヒートパイプ６とのパイプラインが、集熱部材３の内部全長にわたって、蒸発部位１ａと蒸発部位６ａとにより分断されてはいるが、熱的には１本の第１の蒸発部位ラインとして形成された第１の蒸発部位ライン（蒸発部位１ａ、６ａ）と、この第１の蒸発部位ラインの両端側の凝縮部位１ｂ、６ｂが集熱部材３の両端側に配置されて、１本の第１のヒートパイプラインが形成されている。
又、同様に、同軸的に突き合わされた第２及び第４のヒートパイプ２、７とで、集熱部材３の内部全長にわたって、蒸発部位２ａと蒸発部位７ａとにより分断されてはいるが熱的には１本の第２の蒸発部位ラインが形成され、この第２の蒸発部位ライン（蒸発部位２ａ、７ａ）の両端側の凝縮部位２ｂ、７ｂが集熱部材３の両端側に配置されて、１本の第２のヒートパイプラインが形成されている。
【００２７】
この実施の形態２によれば、前記のように構成することによって、４本のヒートパイプ１、２、６、７に傾きが無い通常のヒートパイプ動作では、集熱部材３が、平行に延在する蒸発部位１ａ及び６ａと蒸発部位２ａ及び７ａに沿った集熱部材３の全長にわたって、冷媒４及び８と冷媒５及び９が滞留するので、集熱部材３の全長にわたって温度がほぼ均一に維持される結果、各モジュール延いては各アンテナ素子の温度がほぼ均一に保たれて、良好な信号の送受信ができる。
【００２８】
他方、図４に示すように、ヒートパイプ１、２、６、７が左に傾いた場合には、４本のヒートパイプ１、２、６、７のうち少なくとも２本、図示の例では左側に傾いているため、第１と第４のヒートパイプ１、７の各々の蒸発部位１ａ、７ａの終端に液状態の冷媒４、９が滞留する。しかも、両冷媒４、９の滞留位置が集熱部材３内において、互いに離れた位置としているため、集熱部材３の比較的広い領域、図示の場合は、集熱部材３の全長の半分を超える領域（図中の１ａ、７ａ）にわたって、冷却機能を維持することができる。
【００２９】
逆に、図示されていないが、ヒートパイプ１、２、６、７が右に傾いた場合には、４本のヒートパイプ１、２、６、７のうち少なくとも２本、即ち第２と第３のヒートパイプ２、６の各々の蒸発部位２ａ、６ａの終端に液状態の冷媒５、８が滞留する。しかも、両冷媒５、８の滞留位置が集熱部材３内において、互いに離れた位置としているため、集熱部材３の比較的広い領域、図示の場合は、集熱部材３の全長の半分を超える領域（図中の２ａ、６ａ）にわたって、冷却機能を維持することができる。
【００３０】
このように、この実施の形態２によれば、ヒートパイプ１、２、６、７が左右何れに傾いても、そのうち何れか２本のヒートパイプ（１と６、又は２と７）の液状態の冷媒（４と９又は５と８）が、集熱部材３の長手方向において、当該集熱部材３の熱を均一且つ効率的に吸熱できるよう予め設定しておくことによって、集熱部材３の局所的な温度上昇を防止することができる。
【００３１】
図３及び図４に示す例は、蒸発部位の一方端側に凝縮部位を有するヒートパイプを４本用いて構成してあるが、これに限らず、例えば、蒸発部位の両端側に凝縮部位を有するヒートパイプ（図示せず）２本を、前記の２本一対のヒートパイプラインとして配設し、集熱部材３の内部全長にわたって平行に延在された第１の蒸発部位ライン（図示せず）と第２の蒸発部ライン（図示せず）のパイプ途中に、冷媒の通過を阻止する隔壁を設けて、両蒸発部位を各々左右に分断すると共に、その分断位置、即ち、傾いた状態において冷媒が滞留する位置を、当該集熱部材３において、均一に吸熱できるよう互いに離した位置に設けるよう構成してもよい。
【００３２】
実施の形態３．
実施の形態３は、前記実施の形態２において、２本一対のヒートパイプラインが形成された集熱部材３内に、更に、第５のヒートパイプ１０を前記一対のヒートパイプラインと平行に追加して設けたものである。これを図５及び図６に基づいて説明する。図５はヒートパイプが左に傾いた状態を示す断面図、図６は図５のヒートパイプが右に傾いた状態を示す断面図である。
【００３３】
追加して設けられる第５のヒートパイプ１０（以下、追加ヒートパイプ１０ともいう）は当該集熱部材３に熱的に接続されて配設する。
尚、追加ヒートパイプ１０は集熱部材３の延在方向に一致して配設されていれば、集熱部材３のどの位置にあってもよい。
【００３４】
この場合、何れかに傾いた３本のヒートパイプ（１と７と１０又は２と６と１１）の下端側に溜まる３つの液状冷媒（４、９、１１又は５、８、１１）の位置は、集熱部材３の長手方向において、当該集熱部材３の熱を効率よく均一に吸収するように分散配置されている。
例えば、図５及び図６に示す例では、ヒートパイプ１、２、６、７、１０が左右何れの方向に傾いても、傾いた際に生ずる液状冷媒（４、９、１１又は５、８、１１）が溜まる３つの位置、即ち蒸発部位１ａ、７ａ、１０又は蒸発部位２ａ、６ａ、１０の３つの終端のうち、２つが集熱部材３の両端側に位置し、残る１つが集熱部材３の中央に位置するように分散配置している。
【００３５】
この実施の形態３によれば、第５のヒートパイプ１０を追加したので、図５に示すように、ヒートパイプ１、２、６、７、１０が左に傾いた場合には、第２のヒートパイプ２と第３のヒートパイプ６による冷却が行え難くなった集熱部材３の領域（図中の６ａ）の熱を、第５のヒートパイプ１０の液状態の冷媒１１で吸熱することができる。こうして、吸熱された熱は、例えば、熱的に接続された位置にある第４のヒートパイプ７の冷媒９を介して凝縮部位７ｂにて、又は第１のヒートパイプ１の冷媒４を介して凝縮部位１ｂにて放熱される。
【００３６】
逆に、図６に示すように、ヒートパイプ１、２、６、７、１０が右に傾いた場合には、第１のヒートパイプ１と第４のヒートパイプ７による冷却が行え難くなった集熱部材３の領域（図中の１ａ）の熱を第５のヒートパイプ１０の液状態の冷媒１１で吸熱することができる。吸熱された熱は、例えば、熱的に接続された位置にある第２のヒートパイプ２の冷媒５を介して凝縮部位２ｂにて、又は第３のヒートパイプ６の冷媒８を介して凝縮部位６ｂ放熱される。
【００３７】
この実施の形態３によれば、前記実施の形態２と同様の作用効果を発揮するだけでなく、前記実施の形態２に比べて、集熱部材３の温度分布を更に効率よく均一化することができ、アンテナ特性を正常に保つことができる。
【００３８】
実施の形態４．
実施の形態４を図７に基づいて説明する。図７はヒートパイプが左に傾いた状態を示す断面図である。
図７において、水平状態の集熱部材３に対し、当該集熱部材３の両側に配置されるヒートパイプ（１、７及び２、６）の凝縮部位（１ｂ、７ｂ及び２ｂ、６ｂ）を集熱部材３の水平位置よりも高い位置に設定されるよう、前記ヒートパイプ（１、７及び２、６）の蒸発部位（１ａ、７ａ及び２ａ、６ａ）を、集熱部材３の長さ方向の内部中央に向けて斜めに傾斜させて配設する。
【００３９】
集熱部材３の内部中央側に、下り傾斜で向いた各ヒートパイプ（１、７及び２、６）の蒸発部位（１ａ、７ａ及び２ａ、６ａ）及びその各終端は、前記凝縮部位（１ｂ、７ｂ及び２ｂ、６ｂ）より低くい。従って、左右に配設された一対の平行なヒートパイプ（１と７、及び２と６）は略Ｖ字型となり、略Ｖ字型に配設された各ヒートパイプ（１、２、６、７）の蒸発部位（１ａ、２ａ、６ａ、７ａ）の各終端間、及び左右に各々配設された蒸発部位（１ａと６ａ、及び２ａと７ａ）相互の平行間隔間は互いに熱的に接続された状態に配設する。
【００４０】
この実施の形態４によれば、集熱部材３が水平状態において、左右の各ヒートパイプ（１、７と２、６）が集熱部材３の内部中央を下端側として傾斜させて配設されているので、左右何れかのヒートパイプ（１、７又は２、６）が水平状態に近くなるまで傾いたとしても、左右のヒートパイプ（１、７及び２、６）内の冷媒（４、９、及び５、８）が、蒸発部位（１ａ、７ａ、及び２ａ、６ａ）の終端、即ち集熱部材３の内部中央に滞留するため、４つに分散された全ての冷媒（４、９、及び５、８）が、その冷却機能を維持することができ、従って、アンテナ特性を正常に保つことができる。
【００４１】
又、仮に、左右何れか一方が水平状態となるまで傾いたとしても、他方のヒートパイプ（１、７又は２、６）の蒸発部位（１ａ、７ａ、又は２ａ、６ａ）の終端には必ず冷媒（４、９又は５、８）が滞留する。又、水平状態となったヒートパイプ（１、７又は２、６）内の冷媒（４、９又は５、８）は、当該ヒートパイプ（１、７又は２、６）の延在方向に均一に延在することができるため、４つに分散された全ての冷媒（４、９、及び５、８）が、その冷却機能を維持することができるだけでなく、却って、効率よく集熱部材３の熱を吸熱することができる。
【００４２】
尚、図示の例では、４本の、一方端側に凝縮部位１ｂ、２ｂ、６ｂ、７ｂを有するヒートパイプ１、２、６、７を、左右に各々２本づつ平行に配設しているが、これに限らず、左右にわたって延在する１本のヒートパイプを所要のＶ字型に折り曲げ、折り曲げた部位に、内部の冷媒が一方側から他方側に移動（流通）させない隔壁を設けて、分断させてもよい（図示せず）。
又、図示の例では、ヒートパイプ１、２、６、７を左右に２本づつ（１、７と２、６）平行に配設しているが、何れか１本づつでもよい。
【００４３】
この実施の形態４によれば、略Ｖ字型に配設されたヒートパイプ（１、７、２、６）が、左右何れか一方が水平状態となるまで傾いたとしても、必ず、他方のヒートパイプ（１、７、又は２、６）の蒸発部位（１ａ、７ａ又は２ａ、６ａ）の終端側（集熱部材３の内部中央）に冷媒（４、９又は５、８）が滞留し、しかも滞留する位置が集熱部材３の中央側であるため、集熱部材３の全長の半分を超える領域において、冷却機能を維持することができ、アンテナ特性を正常に保つことができる。
【００４４】
【発明の効果】
本発明によれば、移動体と共にヒートパイプが傾いた場合、一部のヒートパイプは液状態の冷媒が凝縮部位に移動して冷却機能を失ったとしても、他のヒートパイプの冷媒が蒸発部位に液状態で残留して冷却機能を維持することができので、アンテナ特性を正常に保つことができる。
【００４５】
又、本発明によれば、移動体と共にヒートパイプが傾いた場合、一部のヒートパイプが冷却機能を失うために生じる部分的な吸熱不足が、集熱部材内に追加されたヒートパイプにより解消されるので、アンテナの正常動作を維持することができる。
【００４６】
又、本発明によれば、ヒートパイプを略Ｖ字型に配設してあるので、左右何れかのヒートパイプが水平状態にまで傾いても、液状態の冷媒が集熱部材の中央に滞留することができるので、集熱部材の全域にわたって冷却機能を維持することができ、アンテナの正常動作を維持することができる。
【００４７】
又、従来の各ヒートパイプの冷媒の蒸発部位終端分には、冷媒を封入するために金属製の栓等が設けられているため、当該栓の部分に冷媒が到達できないため吸熱作用が劣り、冷却手段が傾かなくても、冷却不足によって局所的に高温部が生じていたが、本発明によれば、このような局所的な高温化を緩和することができ、アンテナの正常動作を維持することができる。
【図面の簡単な説明】
【図１】実施の形態１のヒートパイプの配設状態を示す断面図である。
【図２】実施の形態１のヒートパイプが左に傾いた状態を示す断面図である。
【図３】実施の形態２のヒートパイプの配設状態を示す断面図である。
【図４】実施の形態２のヒートパイプが左に傾いた状態を示す断面図である。
【図５】実施の形態３のヒートパイプが左に傾いた状態を示す断面図である。
【図６】実施の形態３のヒートパイプが右に傾いた状態を示す断面図である。
【図７】実施の形態４のヒートパイプが左に傾いた状態を示す断面図である。
【図８】アンテナ素子を省略した従来のアンテナの正面図である。
【図９】従来のヒートパイプの配設状態を示す斜視図である。
【符号の説明】
１第１のヒートパイプ、２第２のヒートパイプ、３集熱部材、４、５、８、９、１１冷媒、６第３のヒートパイプ、７第４のヒートパイプ、１０第５のヒートパイプ（追加ヒートパイプ）、１ａ、２ａ、６ａ、７ａ蒸発部位、１ｂ、２ｂ、６ｂ、７ｂ凝縮部位。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna for mounting on a moving body, and more specifically, an antenna mounted on a moving body such as an aircraft whose effective gravity direction is easily changed, and a module for controlling the antenna element is disposed on a heat collecting member. The cooling of the antenna is conducted by guiding the heat of this module from the refrigerant evaporating part of the heat pipe provided in the heat collecting member to the refrigerant condensing part of the heat pipe provided on both ends of the heat collecting member. The present invention relates to an antenna for mounting on a moving body provided with a cooling means.
[0002]
[Prior art]
As a conventional technique, a cooling means for a phased array antenna described in Japanese Patent Application Laid-Open No. 11-317618 will be described with reference to FIGS. FIG. 8 is a front view of the antenna from which the antenna element is omitted, and FIG. 9 is a perspective view showing a heat pipe arrangement state.
In FIG. 8, the antenna 20 has an antenna element group 22 formed by arranging a large number of antenna elements (not shown), for example, several tens to thousands on the surface of the antenna 21, and the antenna element group 22. The module 23 is disposed in the vicinity of the antenna element corresponding to each antenna element constituting the. The antenna element is controlled by this module 23 and the signal is processed.
[0003]
Since the module 23 for controlling the antenna element is a heating element, and the antenna characteristics change relatively greatly depending on the temperature of the module 23, conventionally, the heat generation amount of each module 23 is made uniform and the heat dissipation characteristics for each module 23 are obtained. The temperature distribution of the antenna element group 22 is made uniform by using a cooling unit that keeps the temperature distribution of the module group uniform and makes it possible to send and receive good signals.
[0004]
In FIG. 8 and FIG. 9, the antenna cooling means for making the temperature distribution of the module group and thus the antenna element group 22 uniform is configured as follows.
That is, each module 23 is arranged on a metal plate 24 as a heat collecting member, and the heat of the module 23 collected on the metal plate 24 is transferred to a heat pipe 25 (FIG. 9) installed in the metal plate 24. Heat is absorbed at the refrigerant evaporation site, and is dissipated at the refrigerant condensation sites 26 and 26 of the heat pipe provided on the left and right outer sides of the antenna 20.
A heat sink 27, a fan 28 for sending cooling air to the heat sink 27, and the like are disposed at the condensation portions 26 and 26 where the refrigerant sealed in the heat pipe 24 is condensed.
[0005]
In the antenna 20 shown in FIG. 8, the metal plate 24 as a heat collecting member is arranged separately on the left and right in the horizontal direction with a perpendicular passing through the center of the antenna surface 21. The heat pipe 25 is also divided into left and right with the center (perpendicular line) of the antenna 20 as a boundary.
The heat pipe 25 shown in FIG. 9 is divided into a U-shaped heat pipe portion 25A and two linear heat pipe portions 25B and 25C, but the U-shaped heat pipe portion 25A is drawn. The linear heat pipe portions 25B and 25C are respectively connected to both ends of each of the two and operate. The metal plate 24 is a laminate of the metal materials 24a and 24b.
[0006]
[Problems to be solved by the invention]
Conventional antennas as described above can be used without problems because they are generally installed in a stable state, that is, the direction of gravity acting on the refrigerant sealed in the heat pipe is fixed.
However, when mounted on a moving body such as an aircraft whose installation state changes, the effective gravity direction (the Earth's gravitational acceleration, centrifugal force, etc.) is synthesized by the change in flight attitude such as the inclination of the aircraft. The direction in which the applied force changes).
On the other hand, since the liquid refrigerant sealed in the heat pipe can freely move between the evaporation site and the condensation site in the heat pipe, if the direction of gravity changes as described above, that is, in the direction of gravity. When the evaporation part of the heat pipe provided in the heat collecting member is above the condensation part and a difference in height occurs, the refrigerant moves to the lower side and accumulates in the condensation part of the heat pipe, and the cooling function of the part Is lost and the temperature of the heat collecting member rises locally.
[0007]
In the example shown in FIG. 8, the metal plate 24 and the metal plate 24 as heat collecting members are arranged separately at the horizontal center in the vertical center of the antenna surface 21 by chance. In the figure, if the heat pipe (metal plate 24) is tilted in the clockwise direction, the refrigerant of all the right heat pipes 24 gathers in the right condensation part 26, and there is no necessary refrigerant on the metal plate 24 side. The cooling function is lost.
On the other hand, since the refrigerant in the liquid state of all the heat pipes 24 on the left side in the drawing is accumulated at the terminal end side of the evaporation portion of each heat pipe, that is, the longitudinal center side of the antenna surface 21, the cooling function is maintained.
[0008]
As a result, the temperature difference between the right half surface side region and the left half surface side region of the antenna surface 21 becomes significant, and the characteristics of both the right half surface side antenna element group and the left half surface side antenna element group are greatly different. The characteristics of the entire antenna are deteriorated, and good signal transmission / reception becomes impossible.
For this reason, it has been impossible to mount a conventional antenna of this type on a moving body in which the direction of gravity changes.
[0009]
An object of the present invention is to provide an antenna for mounting on a moving body equipped with a cooling means capable of transmitting and receiving a good signal even when mounted on a moving body such as an aircraft whose effective gravity direction is easily changed.
[0010]
[Means for Solving the Problems]
In the present invention, a module for controlling an antenna element is disposed on a heat collecting member, and heat of the module is provided on both ends of the heat collecting member from a refrigerant evaporation portion of a heat pipe provided in the heat collecting member. In the antenna for mounting on a moving body provided with a cooling means for guiding the refrigerant to the condensed portion of the heat pipe and cooling the antenna,
A pair of two having condensing sites at both ends, an evaporation site at the center, and the ends of the evaporation sites being close to each other The heat pipes are arranged in such a manner that the condensation sites of the heat pipes are located on both ends of the heat collecting member, and the evaporation sites of both heat pipes are thermally connected over the entire length of the heat collecting member. And the end of the evaporation part of both heat pipes was made into a different position in the extending direction of each heat pipe from the end of the evaporation part of another pair of heat pipes thermally connected to the heat collecting member. The content.
[0012]
In addition, the present invention is characterized in that the end is configured to be partitioned by a partition wall provided in the middle of one heat pipe so that the refrigerant does not move from one side to the other side.
[0013]
In addition, the present invention is characterized in that a further heat pipe thermally connected to the evaporation site of at least one of the pair of heat pipes is additionally provided in the heat collecting member.
[0014]
Further, the present invention is characterized in that the evaporation sites or the condensation sites of the pair of heat pipes are arranged in parallel in the vertical direction.
[0015]
Further, according to the present invention, a module for controlling the antenna element is disposed on the heat collecting member, and heat of the module from both sides of the heat collecting member from a refrigerant evaporation portion of a heat pipe provided in the heat collecting member In the antenna for mounting on a moving body provided with a cooling means for guiding the refrigerant to the condensation part of the heat pipe provided in
Two pairs of heat pipes having a condensing site on one end side and an evaporating site on the other end side, each condensing site is located on both ends of the heat collecting member, and each evaporating site is the heat collecting site. In addition to being thermally connected to the members, the ends of the evaporation sites are close to each other, and in the horizontal state, the evaporation sites of both heat pipes are set lower than the condensation sites of both heat pipes. The evaporating part is arranged in a substantially V shape.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
The first embodiment will be described below with reference to FIGS. FIG. 1 is a cross-sectional view showing a heat pipe arrangement state, and FIG. 2 is a cross-sectional view showing a state where the heat pipe is tilted to the left.
1 and 2, reference numeral 1 denotes a first heat pipe 2 having an evaporation site 1a on one end side and a condensation site 1b on the other end side. Similarly, an evaporation site 2a is set on the other end side. It is the 2nd heat pipe which has condensation part 2b. Reference numeral 3 denotes a heat collecting member having a large number of modules (not shown) disposed on the surface.
The evaporation parts 1a and 2a are provided in a module (not shown) in which liquid refrigerants 4 and 5 sealed in the first and second heat pipes 1 and 2 are collected by the heat collecting member 3, respectively. It is a part that absorbs heat and evaporates, and the condensation parts 1b and 2b dissipate the heat absorbed by the refrigerants 4 and 5 of the first and second heat pipes 1 and 2 at the evaporation parts 1a and 2a. It is the site | part condensed to a liquid state, ie, a thermal radiation part.
[0017]
The first and second heat pipes 1 and 2 have their condensing parts 1b and 2b symmetrically positioned on the outer sides of both ends in the extending direction of the heat collecting member 3, and the evaporation parts 1a and 2a are heat collecting members. 3, the heat collecting member 3 is disposed so as to extend in parallel over the entire length (left and right direction in the drawing).
In addition, parallel in this specification is not limited to parallel in a strict sense, but is used in a broad sense including a state in which the heat pipe extends in substantially the same direction.
[0018]
Thereby, since the heat collecting member 3 is absorbed by the refrigerants 4 and 5 of at least one of the heat pipes 1 and 2 over the entire length in the length direction (left and right direction in the figure), a local high temperature portion is generated. And the temperature is made uniform efficiently.
[0019]
Further, according to the first embodiment, the condensing part 1b of the first heat pipe 1 and the condensing part 2b of the second heat pipe 2 are extended with the heat collecting member 3 in the center. By installing in a symmetrical positional relationship on both outer sides in the current direction, the heat of the module (not shown) collected by the heat collecting member 3 is efficiently transferred by the refrigerants 4 and 5 of the two evaporation parts 1a and 2a. The heat collecting member 3 can absorb heat well, and the heat of the heat collecting member 3 can be quickly and efficiently transferred to the condensation sites 1b and 2b disposed on both sides of the heat collecting member 3 by the operation of the two heat pipes 1 and 2. It can be moved to dissipate heat to the outside air.
[0020]
Further, in the normal heat pipe operation in which the first and second heat pipes 1 and 2 are not inclined, the temperature of the evaporation parts 1a and 2a is maintained substantially uniform, so that the heat collecting member 3 is provided inside the evaporation part. The temperature becomes substantially uniform along the length direction of 1a and 2a. As a result, the temperature of each module and each antenna element can be kept substantially uniform, and good signal transmission and reception can be achieved.
[0021]
In FIG. 2, when the first and second heat pipes 1 and 2 are tilted to the left together with the moving body (when the effective gravity direction with respect to the refrigerant changes due to centrifugal force or the like in addition to the case where it deviates from the gravity direction) Since the refrigerant 5 in the liquid state of the second heat pipe 2 moves and stays in the condensing part 2b, the necessary refrigerant 5 is depleted in the evaporation part 2a and the cooling function is lost.
However, in the first embodiment, since the refrigerant 4 of the first heat pipe 1 stays in the liquid state at the end of the evaporation site 1a, if the first heat pipe 1 has sufficient heat treatment capability, the heat collecting member It is possible to maintain a cooling function that makes the temperature of the whole 3 substantially uniform.
[0022]
On the contrary, when the first and second heat pipes 1 and 2 are tilted to the right together with the moving body, the liquid state refrigerant 4 of the first heat pipe 1 is condensed, although not shown. Since it moves to 1b and stays, in the evaporation part 1a, the necessary liquid state refrigerant 4 is depleted and the cooling function is lost.
However, even in this case, since the refrigerant 5 of the second heat pipe 2 stays in the liquid state at the end of the evaporation site 2a, if the second heat pipe 2 has sufficient heat treatment capability, the entire heat collecting member 3 A cooling function that makes the temperature substantially uniform can be maintained.
[0023]
Therefore, according to the first embodiment, even if the heat pipes 1 and 2 are inclined to the left or right, the temperature of the module group and the antenna element group can be kept uniform, and the antenna functions normally. be able to.
[0024]
Embodiment 2. FIG.
Hereinafter, the second embodiment will be described with reference to FIGS. FIG. 3 is a cross-sectional view showing a heat pipe arrangement state, and FIG. 4 is a cross-sectional view showing a state where the heat pipe is tilted to the left.
In the third embodiment, as shown in FIG. 3, the ends of the evaporation sites 1 a and 2 a of the first heat pipe 1 and the second heat pipe 2 in the first embodiment are connected to the heat collecting member 3. The length from each condensation site | part 1b, 2b side is formed short so that it may stop inside, and it is thermally connected to the terminal of each of these evaporation site | parts 1a, 2a formed short, respectively. In this state, the end portions of the evaporation portions 6a and 7a of the third and fourth heat pipes 6 and 7 having the condensation portions 6b and 7b are disposed, and the first and third heat pipes 1 and 6 and the second heat pipes In addition, a pair of two heat pipes formed by the fourth heat pipes 2 and 7 are formed in parallel.
[0025]
In the example shown in FIG. 3, a total of four heat pipes, that is, a first heat pipe 1, a second heat pipe 2, a third heat pipe 6, and a fourth heat pipe 7 are used. A pipeline, that is, a pipeline composed of the first heat pipe 1 and the third heat pipe 6 and a pipeline composed of the second heat pipe 2 and the fourth heat pipe 7 are formed.
In the figure, 8 and 9 are liquid refrigerants sealed in the third and fourth heat pipes 6 and 7. In addition, the four heat pipes 1, 6 and 2 and 7 evaporation portions (1a and 6a and 2a and 7a) are thermally connected to each other while maintaining a parallel interval in the heat collecting member 3. It is arranged. Further, the condensing sites 6 b and 7 b on the other end side are provided so as to be located on both outer sides of the heat collecting member 3.
[0026]
In the heat collecting member 3, the third and fourth heat pipes 6 and 7 have the evaporation sites 6a and 7a terminated at the evaporation sites 1a and 2a of the first and second heat pipes 1 and 2, respectively. In close proximity to thermally connect to the end of the.
In the illustrated example, the pipeline of the first heat pipe 1 and the third heat pipe 6 that are coaxially abutted is divided by the evaporation site 1a and the evaporation site 6a over the entire inner length of the heat collecting member 3. However, the first evaporation part line (evaporation part 1a, 6a) formed as one first evaporation part line thermally and the condensation part on both ends of the first evaporation part line 1b and 6b are arrange | positioned at the both ends of the heat collecting member 3, and the one 1st heat pipeline is formed.
Similarly, the second and fourth heat pipes 2 and 7 that are coaxially abutted with each other are divided by the evaporation portion 2a and the evaporation portion 7a over the entire inner length of the heat collecting member 3, but are heated. Specifically, one second evaporation part line is formed, and the condensation parts 2b and 7b on both ends of the second evaporation part line (evaporation parts 2a and 7a) are arranged on both ends of the heat collecting member 3. Thus, one second heat pipeline is formed.
[0027]
According to the second embodiment, the heat collecting member 3 extends in parallel in the normal heat pipe operation in which the four heat pipes 1, 2, 6, and 7 are not inclined by being configured as described above. Since the refrigerants 4 and 8 and the refrigerants 5 and 9 stay over the entire length of the heat collecting member 3 along the existing evaporation parts 1a and 6a and the evaporation parts 2a and 7a, the temperature is almost uniform over the entire length of the heat collecting member 3. As a result, the temperature of each module and each antenna element can be kept substantially uniform, so that a good signal can be transmitted and received.
[0028]
On the other hand, as shown in FIG. 4, when the heat pipes 1, 2, 6, and 7 are tilted to the left, at least two of the four heat pipes 1, 2, 6, and 7, on the left side in the illustrated example Therefore, the refrigerants 4 and 9 in the liquid state stay at the end of the evaporation sites 1a and 7a of the first and fourth heat pipes 1 and 7, respectively. In addition, since the residence positions of the refrigerants 4 and 9 are separated from each other in the heat collecting member 3, a relatively wide area of the heat collecting member 3, in the illustrated case, half of the total length of the heat collecting member 3 is used. The cooling function can be maintained over the exceeding region (1a, 7a in the figure).
[0029]
Conversely, although not shown, when the heat pipes 1, 2, 6, 7 are tilted to the right, at least two of the four heat pipes 1, 2, 6, 7, ie, the second and second The refrigerants 5 and 8 in the liquid state stay at the end of the evaporation sites 2a and 6a of the three heat pipes 2 and 6, respectively. In addition, since the residence positions of the refrigerants 5 and 8 are separated from each other in the heat collecting member 3, a relatively wide area of the heat collecting member 3, in the illustrated case, half of the total length of the heat collecting member 3 is used. A cooling function can be maintained over the area | region (2a, 6a in a figure).
[0030]
As described above, according to the second embodiment, even if the heat pipes 1, 2, 6, and 7 are inclined to the left and right, any two of the heat pipes (1 and 6 or 2 and 7) are liquids. The refrigerant (4 and 9 or 5 and 8) in the state is set in advance so that the heat of the heat collecting member 3 can be absorbed uniformly and efficiently in the longitudinal direction of the heat collecting member 3. 3 local temperature rise can be prevented.
[0031]
The example shown in FIGS. 3 and 4 is configured by using four heat pipes having a condensing part on one end side of the evaporation part. However, the present invention is not limited to this. For example, condensing parts are provided on both end sides of the evaporation part. Two heat pipes (not shown) are arranged as a pair of the two heat pipes, and a first evaporation site line (not shown) extending in parallel over the entire inner length of the heat collecting member 3. ) And a second evaporating section line (not shown) in the middle of the pipe, a partition wall for preventing the passage of the refrigerant is provided to divide both evaporation parts to the left and right, and in the divided position, that is, in an inclined state You may comprise so that the position where a refrigerant | coolant stagnates may be provided in the heat collection member 3 in the position away from each other so that it can absorb heat uniformly.
[0032]
Embodiment 3 FIG.
In the third embodiment, a fifth heat pipe 10 is further added in parallel with the pair of heat pipelines in the heat collecting member 3 in which two pairs of heat pipelines are formed in the second embodiment. It is provided. This will be described with reference to FIGS. 5 is a cross-sectional view showing a state in which the heat pipe is tilted to the left, and FIG. 6 is a cross-sectional view showing a state in which the heat pipe in FIG. 5 is tilted to the right.
[0033]
An additional fifth heat pipe 10 (hereinafter, also referred to as an additional heat pipe 10) is thermally connected to the heat collecting member 3 and disposed.
The additional heat pipe 10 may be located at any position on the heat collecting member 3 as long as the additional heat pipe 10 is disposed so as to coincide with the extending direction of the heat collecting member 3.
[0034]
In this case, the positions of the three liquid refrigerants (4, 9, 11 or 5, 8, 11) accumulated on the lower end side of the three heat pipes (1 and 7 and 10 or 2 and 6 and 11) inclined to one of them Are distributed in the longitudinal direction of the heat collecting member 3 so as to efficiently and uniformly absorb the heat of the heat collecting member 3.
For example, in the example shown in FIGS. 5 and 6, even if the heat pipes 1, 2, 6, 7, 10 are tilted in any direction, the liquid refrigerant (4, 9, 11 or 5, 8 generated when tilted) 11), two of the three ends of the evaporation sites 1a, 7a and 10 or the evaporation sites 2a, 6a and 10 are located at both ends of the heat collecting member 3, and the remaining one is the heat collecting member. The members 3 are arranged in a distributed manner so as to be located at the center.
[0035]
According to the third embodiment, since the fifth heat pipe 10 is added, as shown in FIG. 5, when the heat pipes 1, 2, 6, 7, 10 are inclined to the left, the second heat pipe 10 is added. The heat of the region of the heat collecting member 3 (6a in the figure) that has become difficult to cool by the heat pipe 2 and the third heat pipe 6 can be absorbed by the liquid state refrigerant 11 of the fifth heat pipe 10. it can. Thus, the absorbed heat is, for example, at the condensing part 7b via the refrigerant 9 of the fourth heat pipe 7 located at the thermally connected position or via the refrigerant 4 of the first heat pipe 1. Heat is dissipated at the condensation site 1b.
[0036]
Conversely, as shown in FIG. 6, when the heat pipes 1, 2, 6, 7, 10 are tilted to the right, it becomes difficult to perform cooling by the first heat pipe 1 and the fourth heat pipe 7. The heat of the region (1a in the drawing) of the heat collecting member 3 can be absorbed by the liquid state refrigerant 11 of the fifth heat pipe 10. The absorbed heat is, for example, condensed at the condensing part 2b via the refrigerant 5 of the second heat pipe 2 at the thermally connected position or condensed through the refrigerant 8 of the third heat pipe 6. 6b is dissipated.
[0037]
According to the third embodiment, not only the same effects as those of the second embodiment are exhibited, but also the temperature distribution of the heat collecting member 3 is made more efficient and uniform as compared with the second embodiment. The antenna characteristics can be kept normal.
[0038]
Embodiment 4 FIG.
The fourth embodiment will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a state in which the heat pipe is tilted to the left.
In FIG. 7, the condensing sites (1b, 7b and 2b, 6b) of the heat pipes (1, 7, and 2, 6) disposed on both sides of the heat collecting member 3 are collected with respect to the heat collecting member 3 in the horizontal state. The evaporating sites (1a, 7a and 2a, 6a) of the heat pipes (1, 7 and 2, 6) are set in the longitudinal direction of the heat collecting member 3 so as to be set at a position higher than the horizontal position of the heat member 3. It is inclined and arranged toward the center of the interior.
[0039]
The evaporation part (1a, 7a and 2a, 6a) of each heat pipe (1, 7 and 2, 6) facing downwardly inclined toward the inner center side of the heat collecting member 3 and its end are connected to the condensation part (1b 7b and 2b, 6b). Therefore, a pair of parallel heat pipes (1 and 7, and 2 and 6) arranged on the left and right sides are substantially V-shaped, and each heat pipe (1, 2, 6, 7) between the end portions of the evaporation sites (1a, 2a, 6a, 7a) and between the parallel intervals of the evaporation sites (1a and 6a and 2a and 7a) disposed on the left and right sides, are thermally connected to each other. It arranges in the state where it is done.
[0040]
According to the fourth embodiment, when the heat collecting member 3 is in a horizontal state, the left and right heat pipes (1, 7, 2 and 6) are disposed so as to be inclined with the inner center of the heat collecting member 3 as the lower end side. Therefore, even if one of the left and right heat pipes (1, 7 or 2, 6) is tilted until it approaches a horizontal state, the refrigerant (4, 9, 5, 8) stays at the end of the evaporation site (1 a, 7 a, 2 a, 6 a), that is, the inner center of the heat collecting member 3, so that all the refrigerants dispersed in four (4, 9 , And 5, 8) can maintain its cooling function, and therefore the antenna characteristics can be kept normal.
[0041]
Also, even if either the left or right side is tilted until it becomes horizontal, the end of the evaporation site (1a, 7a or 2a, 6a) of the other heat pipe (1, 7 or 2, 6) must be The refrigerant (4, 9 or 5, 8) stays. In addition, the refrigerant (4, 9 or 5, 8) in the heat pipe (1, 7, or 6, 6) in a horizontal state is uniform in the extending direction of the heat pipe (1, 7, or 2, 6). Therefore, all the refrigerants (4, 9, and 5, 8) dispersed in four can not only maintain the cooling function but also efficiently collect the heat collecting member 3. Can absorb the heat.
[0042]
In the example shown in the figure, four heat pipes 1, 2, 6, and 7 each having condensing sites 1b, 2b, 6b, and 7b on one end side are arranged in parallel on the left and right sides. However, the present invention is not limited to this, and a partition that prevents the internal refrigerant from moving (circulating) from one side to the other side is provided at the bent portion of a single heat pipe that extends over the left and right sides. , May be divided (not shown).
In the illustrated example, two heat pipes 1, 2, 6, and 7 are arranged in parallel on the left and right sides (1, 7 and 2, 6), but any one of them may be provided.
[0043]
According to the fourth embodiment, even if the heat pipe (1, 7, 2, 6) arranged in a substantially V shape is inclined until either one of the left and right is in a horizontal state, Refrigerant (4, 9 or 5, 8) stays at the terminal side (inside the center of the heat collecting member 3) of the evaporation part (1a, 7a or 2a, 6a) of the heat pipe (1, 7, or 2, 6). Moreover, since the staying position is on the center side of the heat collecting member 3, the cooling function can be maintained in a region exceeding half the total length of the heat collecting member 3, and the antenna characteristics can be kept normal.
[0044]
【The invention's effect】
According to the present invention, when the heat pipe is tilted together with the moving body, even if some of the heat pipes lose the cooling function due to the liquid refrigerant moving to the condensation site, Therefore, the antenna characteristics can be maintained normally.
[0045]
Further, according to the present invention, when the heat pipe is tilted together with the moving body, the partial heat absorption shortage caused by the loss of the cooling function of some heat pipes is solved by the heat pipe added in the heat collecting member. Therefore, the normal operation of the antenna can be maintained.
[0046]
Further, according to the present invention, since the heat pipe is arranged in a substantially V shape, the liquid refrigerant stays in the center of the heat collecting member even if either the left or right heat pipe is inclined to the horizontal state. So that the cooling function can be maintained over the entire area of the heat collecting member, and the normal operation of the antenna can be maintained. In wear.
[0047]
In addition, since the end of the evaporation site of the refrigerant of each conventional heat pipe is provided with a metal plug or the like to enclose the refrigerant, the refrigerant cannot reach the plug portion, so the endothermic action is inferior, Even if the cooling means is not tilted, the high temperature portion is locally generated due to insufficient cooling. However, according to the present invention, such local high temperature can be alleviated and the normal operation of the antenna is maintained. be able to.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an arrangement state of a heat pipe according to a first embodiment.
FIG. 2 is a cross-sectional view showing a state where the heat pipe of the first embodiment is tilted to the left.
FIG. 3 is a cross-sectional view showing an arrangement state of a heat pipe according to a second embodiment.
FIG. 4 is a cross-sectional view showing a state where the heat pipe of the second embodiment is tilted to the left.
FIG. 5 is a cross-sectional view showing a state in which the heat pipe of the third embodiment is tilted to the left.
FIG. 6 is a cross-sectional view showing a state in which the heat pipe of the third embodiment is tilted to the right.
FIG. 7 is a cross-sectional view showing a state where the heat pipe of the fourth embodiment is tilted to the left.
FIG. 8 is a front view of a conventional antenna in which an antenna element is omitted.
FIG. 9 is a perspective view showing an arrangement state of a conventional heat pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st heat pipe, 2nd 2nd heat pipe, 3 Heat collecting member 4, 5, 8, 9, 11 Refrigerant, 6 3rd heat pipe, 7th 4th heat pipe, 10th 5th heat pipe (Additional heat pipe) 1a, 2a, 6a, 7a Evaporation site, 1b, 2b, 6b, 7b Condensation site.

Claims

The module for controlling the antenna element is disposed on the heat collecting member, and the heat provided on the both ends of the heat collecting member from the evaporation portion of the refrigerant of the heat pipe provided in the heat collecting member. In the antenna for mounting on a moving body, which is provided with a cooling means for cooling the antenna by guiding the refrigerant to the condensation part of the pipe
A pair of heat pipes having a condensing part on both ends, an evaporation part on the center side, and the end of the evaporation part being close to each other, and the condensing parts of both heat pipes on the both ends of the heat collecting member, respectively Located in a state where the evaporation parts of both heat pipes are thermally connected over the entire length of the heat collecting member, and the terminal ends of the evaporation parts of both heat pipes are separately connected to the heat collecting member. An antenna for mounting on a moving body, characterized in that the position of the evaporation part of the pair of two heat pipes is different in the extending direction of each heat pipe.

2. The moving body mounting device according to claim 1, wherein the end is configured to be partitioned by a partition wall provided in the middle of one heat pipe so that the refrigerant does not move from one side to the other side. antenna.

3. The heat collecting member according to claim 1, further comprising another heat pipe thermally connected to at least one of the evaporation parts of the pair of heat pipes. Mobile mounting antenna.

Evaporation site or condensation site of the pair of heat pipes, the mobile mounting antenna according to any one of claims 1 to 3, characterized in that disposed in parallel in the vertical direction.

A module for controlling the antenna element is disposed on the heat collecting member, and heat pipes provided on both ends of the heat collecting member from the refrigerant evaporation portion of the heat pipe provided in the heat collecting member In the antenna for mounting on a moving body provided with a cooling means for guiding the refrigerant to the condensation site of the
Two pairs of heat pipes having a condensing site on one end side and an evaporating site on the other end side, each condensing site is located on both ends of the heat collecting member, and each evaporating site is the heat collecting site. In addition to being thermally connected to the members, the ends of the evaporation sites are close to each other, and in the horizontal state, the evaporation sites of both heat pipes are set lower than the condensation sites of both heat pipes. An antenna for mounting on a moving body, characterized in that the evaporating part is arranged in a substantially V shape.