JP2004293573A - Valve element driving device - Google Patents

Valve element driving device Download PDF

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Publication number
JP2004293573A
JP2004293573A JP2003083163A JP2003083163A JP2004293573A JP 2004293573 A JP2004293573 A JP 2004293573A JP 2003083163 A JP2003083163 A JP 2003083163A JP 2003083163 A JP2003083163 A JP 2003083163A JP 2004293573 A JP2004293573 A JP 2004293573A
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Japan
Prior art keywords
valve body
valve
open
closed
mode
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JP2003083163A
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Japanese (ja)
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JP4128894B2 (en
Inventor
Shigeru Ozawa
滋 小澤
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Nidec Instruments Corp
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Sankyo Seiki Manufacturing Co Ltd
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Priority to JP2003083163A priority Critical patent/JP4128894B2/en
Priority to KR1020040020096A priority patent/KR100581419B1/en
Priority to CNB2004100322158A priority patent/CN100377480C/en
Publication of JP2004293573A publication Critical patent/JP2004293573A/en
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Publication of JP4128894B2 publication Critical patent/JP4128894B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
    • F16K11/18—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle with separate operating movements for separate closure members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/24—Structural association with auxiliary mechanical devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Multiple-Way Valves (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve element driving device for increasing an opening/closing mode for an opening without preventing miniaturization, and surely realizing each mode. <P>SOLUTION: In the valve element driving device, a first disc valve 8 is interlocked with a pinion 512 either in normal rotation when the pinion 512 is rotated clockwise CW or in reverse rotation when the pinion 512 is rotated counterclockwise CCW. On the contrary, in a second disc valve 9, as driving force is transmitted by a circular arc groove 932 of a second gear 93 and an engaging projection 916 of a second valve element 91, the transmission of drive to the second valve element 91 is blocked for a predetermined period when a driving direction is reversed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の開口を弁体で開閉して流体を分配するための弁体駆動装置に関するものである。
【０００２】
【従来の技術】
冷蔵庫において共通の冷媒を複数の庫内冷却用に分配して各庫内を冷却するための弁装置などには、流入口から供給した冷媒を複数の流出口を介して各庫内に分配する３方弁、４方弁、さらには５方弁などの多方弁が用いられている。
【０００３】
これらの多方弁のうち、例えば、３方弁に用いられている弁体駆動装置では、図６に示すように、冷媒が流入する流入口１０３と、流入口１０３から供給した冷媒を流出する流出口１０４ａ、１０４ｂとが密閉ケース内１１０に位置され、この密閉ケース内１１０には平板状のディスク弁１０５も配置されている。ここで、ディスク弁１０５は、流出口１０４ａ、１０４ｂを閉状態にする弁体１０６（図６において斜線で示す領域）と、この弁体１０６と一体に形成されている歯車１０７と備えており、この歯車１０７には、正逆回転可能なステッピングモータ（図示せず）によって駆動されるピニオン１０８が噛み合っている。このため、ステッピングモータがピニオン１０８を時計周りＣＷの方向、あるいは反時計周りＣＣＷの方向に駆動すれば、その回転が歯車１０７を介して弁体１０６に伝達される。その結果、流出口１０４ａ、１０４ｂがそれぞれ開閉される結果、双方が閉状態の閉−閉モード、双方が開状態の開−開モード、一方が開状態で他方が閉状態の開―閉モード、一方が閉状態で他方が開状態の閉−開モードからなる４つのモードを実現できる。また、流出口を１つ、増やすとともに、弁体の形状を変更すれば、８つのモードを実現できることになる。
【０００４】
【発明が解決しようとする課題】
しかしながら、ディスク弁の開閉に関して複数のモード、例えば、８つのモードを実現しようとすると、弁体１０６の回転角度範囲を８分割する必要があるため、各モードに十分な区間を設定できないという問題点がある。すなわち、開状態にある流出口を閉じ始めてから完全に閉状態とするだけでも、流出口の大きさの分、ディスク弁を所定の角度範囲にわたって回転移動させる必要があるとともに、流出口同士を十分、離間させて弁体をある程度の距離を移動させないとモードを切り換えを確実に行えないからである。それ故、図６に示すような弁体駆動装置では、よほどサイズを大きくしない限り、２８２°の回転角度範囲内には７つの停止箇所を設定して７モードを確保するのが限界である。
【０００５】
また、２つの弁体を用いた場合でも、１つの弁体からみれば、その回転角度範囲をモードの数だけ分割することになるので、モードの数を増やすことは困難である。
【０００６】
以上の問題点に鑑みて、本発明の課題は、小型化を妨げることなく、開口の開閉モードを増やすことのでき、かつ、確実に各モードを実現できる弁体駆動装置を提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明に係る弁体駆動装置では、単数あるいは複数の第１の開口を開閉するための第１の弁体と、単数あるいは複数の第２の開口を開閉するための第２の弁体と、前記第１の弁体および前記第２の弁体を双方向に駆動して前記第１の開口、および前記第２の開口を各々、開状態あるいは閉状態に切り換える共通の駆動機構とを有し、さらに、前記共通の駆動機構により前記第１の弁体および前記第２の弁体が正方向に駆動されたときと、前記共通の駆動機構により前記第１の弁体および前記第２の弁体が逆方向に駆動されたときとの間で、前記第１の弁体によって切り換えられる前記第１の開口の開閉状態と、前記第２の弁体によって切り換えられる前記第２の開口の開閉状態との組み合わせを変える組み合わせ切換機構を有していることを特徴とする。本発明において、前記第１の開口および前記第２の開口の合計数は、例えば、３以上である。
【０００８】
本発明では、例えば、第１の弁体が２つの第１の開口を開閉し、第２の弁体が１つの第２の開口を開閉するとした場合、共通の駆動機構が第１の弁体を駆動すると、例えば、第１の弁体は、２つの第１の開口を開閉して、双方が閉状態の閉−閉モード、双方が開状態の開−開モード、一方が開状態で他方が閉状態の開―閉モード、一方が閉状態で他方が開状態の閉−開モードからなる４つのモードを実現する。また、共通の駆動機構が第２の弁体を駆動すると、第２の開口での開モードと閉モードとからなる２つのモードに、２つの第１の開口での４つのモードとを組み合わせた８つのモードが可能となる。但し、本発明では、これらの８つのモードを共通の駆動機構による正方向への駆動区間に全てを割り付るのではなく、例えば、正方向への駆動区間には５つのモードのみを割り付ける一方、組み合わせ切換機構によって、逆方向への駆動区間に残り３つのモードを出現させる。それ故、１つのモードに割り付ける区間が広いので、装置を大型化しなくても、多くの開閉モードを確実に実行できる。
【０００９】
本発明において、前記組み合わせ切換機構は、例えば、前記共通の駆動機構が前記第１の弁体および前記第２の弁体に対する駆動方向を正方向から逆方向に駆動方向を反転したとき、および逆方向から正方向に反転したときに、所定の区間、前記共通の駆動機構から前記第１の弁体への駆動伝達、あるいは前記第２の弁体への駆動伝達を遮断する遊び機構によって構成することができる。このように構成すると、広い区間にわたって、第２の弁体に対する駆動方向を正方向から逆方向に駆動方向を反転したとき、および逆方向から正方向に反転したときに第１あるいは第２の弁体への駆動伝達を所定期間、遮断するため、逆方向への駆動によって出現するモードに移行する際に駆動時間が短く済むという利点がある。
【００１０】
本発明において、前記共通の駆動機構は、ステッピングモータを駆動源として備え、当該ステッピングモータに対するステップ数により、前記第１の弁体、および前記第２の弁体の停止位置を制御することが好ましい。
【００１１】
【発明の実施の形態】
図面を参照して、本発明を適用した弁体駆動装置の一例を説明する。
【００１２】
（全体構成）
図１（ａ）、（ｂ）は、本発明に係る弁体駆動装置の断面図、および弁体駆動装置の弁体機構を示す図である。図２（ａ）ないし（ｌ）は、本発明に係る弁体駆動装置の第２のディスク弁の平面図、Ａ−Ａ断面図、底面図、弁体駆動装置の第２のディスク弁の第２の歯車の平面図、第２の歯車のＢ−Ｂ断面図、第２の歯車の底面図、センターブッシュの平面図、センターブッシュのＣ−Ｃ断面図、センターブッシュの底面図、パッドの平面図、パッドのＤ−Ｄ断面図、およびパッドの底面図である。
【００１３】
図１（ａ）、（ｂ）において、本形態の弁体駆動装置１は、金属板などからなる弁座プレート２の上は密閉ケース３で気密封止されており、密閉ケース３の内外には、後述するディスク弁を駆動するためのステッピングモータ５が配置されている。ステッピングモータ５において、ロータ５１は密閉ケース３の内側に配置されている一方、密閉ケース３の外周側にステータ５２が配置されている。ステータ５２の固定コイル５２１からは信号線５２２が引き出され、この信号線５２２に対して、マイクロコンピュータを備えた制御部（図示せず）が制御アルゴリズムに従って駆動信号を出力することにより、ロータ５１の正方向あるいは逆方向の回転、および停止が制御されている。
【００１４】
ロータ５１は、ロータ支軸５１３に対して回転可能に支持されている。ロータ支軸５１３には、ピニオン５１２も回転可能に支持され、このピニオン５１２は、ロータ５１と一体に回転可能である。
【００１５】
密閉ケース３の下端側は、上端側に比べて大径とされており、ステータ５２を載置する段差が形成されているとともに、弁座プレート２の外周縁に形成されている段差と密着している。
【００１６】
図１（ａ）に示すように、弁座プレート２には、３つの流出口２２ａ、２２ｂ、２２ｃと、流入口２１とが形成されている。３つの流出口２２ａ、２２ｂ、２２ｃは、弁座プレート２に差し込まれた第１、第２および第３の流入パイプ７ａ、７ｂ、７ｃとそれぞれ連通しており、流入口２１は、弁座プレート２に差し込まれた流入パイプ６に連通している。このため、流入口２１から密閉ケース３に導入された冷媒は、流出口２２ａ、２２ｂ、２２ｃから流出することになる。
【００１７】
弁座プレート２の上面には、ピニオン５１２を挟む両側に第１のディスク弁８と第２のディスク弁９とが配置され、これらのディスク弁８、９は、板バネ１０により台座プレート２の側へ付勢されている。
【００１８】
第１のディスク弁８は、弁座プレート２に形成された流出口２２ａ、２２ｂ（第１の開口）の近傍に位置し、第１のディスク弁８の回転軸に対して同軸状態に配置された弁体支軸１１により回転自在の状態で支持されている。第１のディスク弁８は、第１の弁体８１と、この第１の弁体８１と一体に形成されている第１の歯車８２とを備えている。この第１の歯車８２は、ステッピングモータ５のロータ５１と一体に回転するピニオン５１２と噛み合っている。
【００１９】
このため、ステッピングモータ５を駆動すれば、その回転がピニオン５１２および第１の歯車８２を介して第１の弁体８１に伝達される。本形態では、流出口２２ａ、２２ｂは、第１の弁体８１によって開閉される。
【００２０】
第２のディスク弁９は、弁座プレート２に形成された流出口２２ｃ（第２の開口）の近傍に位置し、第２のディスク弁９の回転軸に対して同軸状態に配置された弁体支軸１２により回転自在の状態で支持されている。
【００２１】
ここで、第２のディスク弁９は、図２（ａ）ないし（ｃ）に示すように、第２の弁体９１と第２の歯車９３とを有している。第２の歯車９３は、ステッピングモータ５のロータ５１と一体に回転するピニオン５１２と噛み合っている。このため、ステッピングモータ５を駆動すれば、その回転がピニオン５１２および第２の歯車９３を介して第２の弁体９１に伝達される。本形態では、流出口２２ｃは、第２の弁体９１によって開閉される。
【００２２】
このようにして、本形態では、ステッピングモータ５、ピニオン５１２、第１の歯車８２、および第２の歯車９３によって減速しながら、第１の弁体８１および第２の弁体９１を駆動する共通の駆動機構４が構成されている。
【００２３】
（組み合わせ切換機構の構成）
本形態において、共通の駆動機構４には、ステッピングモータ５により弁体８１、および弁体９１が正方向に駆動されたときと、ステッピングモータ５により弁体８１および弁体９１が逆方向に駆動されたときとの間で、第１の弁体８１によって切り換えられる流出口２２ａ、２２ｂの開閉状態と、第２の弁体９１によって切り換えられる流出口２２ｃでの開閉状態との組み合わせを変える組み合わせ切換機構が構成されており、このような組み合わせ切換機構の構成を図２および図３を参照して説明する。なお、以下の説明では、ステッピングモータ５によりピニオン５１２が時計周りＣＷに回転し、その結果、第１および第２の歯車８２、９３が反時計周りＣＣＷに回転するときを正回転とし、ステッピングモータ５によりピニオン５１２が反時計周りＣＣＷに回転し、その結果、第１および第２の歯車８２、９３が時計周りＣＷに回転するときを逆回転とする。
【００２４】
図３は、本発明に係る弁体駆動装置において、第２のディスク弁の組み合わせ切換機構を示した図である。
【００２５】
本形態では、組み合わせ切換機構を構成するために、図２（ａ）〜（ｃ）に示す第２のディスク弁９は、図２（ｄ）ないし（ｆ）に示す第２の歯車９３と、図２（ｇ）〜（ｉ）に示すセンターブッシュ９１１と、図２（ｊ）〜（ｌ）に示すパッド９２０とから構成されている。
【００２６】
センターブッシュ９１１は、中空円筒に形成された円筒本体９１２と、この円筒本体９１２の外周面に形成された大径部９１３とを備えている。円筒本体９１２には、この円筒本体９１２を軸方向に貫通する軸穴９１４が形成されており、この軸穴９１４に、図１（ｂ）に示す弁体支軸１２が差し込まれる。また、大径部９１３は、一方側の端面に、円柱状の３つの加締突起９１５が形成されている。また、センターブッシュ９１１では、円筒本体９１２の周りに係合突起９１６が形成されており、この係合突起９１６は、大径部９１３から軸線方向に突き出ている。
【００２７】
パッド９２０は円盤状に形成されており、一方側の端面は平坦に形成されている一方、他方側の端面は凸部（図２の（ｌ）において斜線で示す領域）９２３が形成され、この凸部９２３が流出口２２ｃを封鎖する弁部となっている。パッド９２０の中央部分には、センターブッシュ９１１の円筒本体９１２を差し込むための差込穴９２１が形成され、この差込穴９２１の周りにおいてセンターブッシュ９１１の大径部９１３の加締突起９１５に対応する位置には加締穴９２２が形成されている。
【００２８】
このため、パッド９２０にセンターブッシュ９１１を差し込み、この状態で加締突起９１５を加締めれば、パッド９２０とセンターブッシュ９１１とが一体化し、第２の弁体９１が構成される。このように第２の弁体９１を構成した状態で、センターブッシュ９１１からは、係合突起９１６が突き出た状態にある。
【００２９】
第２の歯車９３の中心には、センターブッシュ９１１の円筒本体９１２の外径よりも僅かに大きな内径の中心穴９３１が形成されており、この中心穴９３１に第２の弁体９１の円筒本体９１２を差し込むことによって、第２の歯車９３と第２の弁体９１とを連結させ、第２のディスク弁９が構成されている。
【００３０】
このようにして第２のディスク弁９を構成した状態で、第２の歯車９３には、中心穴９３１に繋がる円弧状の溝９３２が形成される一方、第２の弁体９１を構成するセンターブッシュ９１１から突き出た係合突起９１６が第２の歯車９３の溝９３２内に入り込む。
【００３１】
ここで、溝９３２は、係合突起９１６と比較して長い。このため、図３（ａ）に示すように、溝９３２の反時計周りＣＣＷの側の端部に位置する内壁９３２ｂが係合突起９１６に当接している状態で、ピニオン５１２が反時計周りＣＣＷに回転する逆回転時に、第２の歯車９３が時計周りＣＷの方向に回転すると、係合突起９１６は、溝９３２の内壁９３２ｂに押圧されて第２の歯車９３の回転が第２の弁体９１に伝達され、第２の弁体９１は時計周りＣＷに回転する。
【００３２】
これに対して、図３（ａ）に示す状態で、ピニオン５１２が時計周りＣＷに回転する正回転時に、第２の歯車９３が反時計周りＣＣＷの方向に回転すると、図３（ｂ）に示す状態を経由して図３（ｃ）に示す状態になるまで、内壁９３２ｂが係合突起９１６から離間する方向に移動する一方、溝９３２の時計周りＣＷの側の端部に位置する内壁９３２ａが係合突起９１６に接近して当接するだけで、第２の歯車９３の回転は、第２の弁体９１に伝達されない。従って、第２の弁体９１は回転しない。
【００３３】
それとは逆に、図３（ｃ）に示すように、溝９３２の時計周りＣＷの側の端部に位置する内壁９３２ａが係合突起９１６に当接している状態で、ピニオン５１２が時計周りＣＷに回転する正回転時に、第２の歯車９３が反時計周りＣＣＷの方向に回転すると、係合突起９１６は、溝９３２の内壁９３２ａに押圧されて第２の歯車９３の回転が第２の弁体９１に伝達され、第２の弁体９１は反時計周りＣＣＷに回転する。
【００３４】
これに対して、図３（ｃ）に示す状態で、ピニオン５１２が反時計周りＣＣＷに回転する逆回転時に、第２の歯車９３が時計周りＣＷの方向に回転すると、図３（ｂ）に示す状態を経由して図３（ａ）に示す状態になるまで、内壁９３２ａが係合突起９１６から離間する方向に移動する一方、内壁９３２ａｂ係合突起９１６に接近して当接するだけで、第２の歯車９３の回転は、第２の弁体９１に伝達されない。従って、第２の弁体９１は回転しない。
【００３５】
このようにして本形態では、ステッピングモータ５により弁体８１、９１に対する駆動方向を正方向から逆方向に駆動方向を反転するとき、および逆方向から正方向に反転させるときに、所定の区間、ステッピングモータ５から第２の弁体９１への駆動伝達を遮断する遊び機構４１が構成され、この遊び機構４１により、組み合わせ切換機構が構成されている。
【００３６】
これに対して、第１のディスク弁８において、ピニオン５１２と噛みあう第１の歯車８２と、第１の弁体８１とは一体であるため、ピニオン５１２が時計周りＣＷに回転する正回転時、および反時計周りＣＣＷに回転する逆回転時のいずれにおいても、第１の弁体８１は、常時、ピニオン５１２に機構的に接続された状態にあるため、常時、ピニオン５１２に連動して回転する。
【００３７】
（動作説明）
図４および図５を参照して本形態の動作を説明するが、以下の説明では、各モードを表すにあたって、流出口２２ａの状態−流出口２２ｂの状態−流出口２２ｃの状態で示す。例えば、流出口２２ａが開状態−流出口２２ｂが開状態−流出口２２ｃが閉状態のときは、開−開−閉モードと表す。
【００３８】
図４（ａ）ないし（ｈ）は、本形態に係る弁体駆動装置において、ステッピングモータ５によりピニオン５１２が時計周りＣＷに回転し、その結果、第１および第２の歯車８２、９３が反時計周りＣＣＷに回転する正回転時の各開閉モードの説明図である。図５（ａ）ないし（ｈ）は、本形態に係る弁体駆動装置において、ステッピングモータ５によりピニオン５１２が反時計周りＣＣＷに回転し、その結果、第１および第２の歯車８２、９３が時計周りＣＷに回転する逆回転時の各開閉モードの説明図である。
【００３９】
図４（ａ）ないし（ｈ）において、まず、第２のディスク弁９の係合突起９１６が溝９３２の反時計周りＣＣＷの側の端部に位置する内壁９３２ｂと当接している状態を原点位置とし（図４（ａ）に示す状態）、この状態からステッピングモータ５が４ステップ、ピニオン５１２を時計周りＣＷに回転させると、第１の弁体８１は反時計周りＣＣＷに回転するが、第２の弁体９１には、遊び機構４１により、ピニオン５１２および第２の歯車９３を介しての駆動伝達が遮断されているため、第２の弁体９１は回転しない。このため、図４（ｂ）に示すように、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、開状態、閉状態となる（閉−開−閉モード）。
【００４０】
次に、４０ステップでは、図４（ｃ）に示すように、第１の弁体８１は反時計周りＣＣＷに回転するが、第２の弁体９１は回転しないため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、閉状態、閉状態となる（閉−閉−閉モード）。
【００４１】
次に、７６ステップでは、図４（ｄ）に示すように、第１の弁体８１、および第２の弁体９１の双方が反時計周りＣＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、開状態、開状態となる（開−開−開モード）。
【００４２】
次に、１１２ステップでは、図４（ｅ）に示すように、第１の弁体８１、および第２の弁体９１の双方が反時計周りＣＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、開状態、開状態となる（閉−開−開モード）。
【００４３】
次に、１４８ステップでは、図４（ｆ）に示すように、第１の弁体８１、および第２の弁体９１の双方が反時計周りＣＣＷに回転するため、流出口２２ａ、２２ｂ、流出口２２ｃはそれぞれ、開状態、閉状態、開状態となる（開−閉−開モード）。
【００４４】
次に、１８４ステップでは、図４（ｇ）に示すように、第１の弁体８１、および第２の弁体９１の双方が反時計周りＣＣＷに回転するが、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、閉状態、閉状態のままである（開−閉−閉モード）。
【００４５】
さらに１８８ステップになると、図４（ｈ）に示す状態で停止し、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、閉状態、閉状態のままである。
【００４６】
これに対して、図５（ａ）ないし（ｈ）において、第２のディスク弁９の係合突起９１６が溝９３２の時計周りＣＷの側の端部に位置する内壁９３２ａと当接している状態（図４（ｈ）、図５（ｈ）に示す状態）からステッピングモータ５が逆回転して、１８４ステップまで、ピニオン５１２を反時計周りＣＣＷに戻すと、第１の弁体８１は時計周りＣＷに回転するが、第２の弁体９１には、遊び機構４１により、ピニオン５１２および第２の歯車９３を介しての駆動伝達が遮断されているため、第２の弁体９１は回転しない。このため、図５（ｇ）に示すように、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、閉状態、閉状態となる（開−閉−閉モード）。
【００４７】
次に、１４８ステップまで戻すと、図５（ｆ）に示すように、第１の弁体８１は時計周りＣＷに回転するが、第２の弁体９１は回転しないため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、閉状態、閉状態のままである（開−閉−閉モード）。
【００４８】
次に、１１２ステップまで戻すと、図５（ｅ）に示すように、第１の弁体８１、および第２の弁体９１の双方が時計周りＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、開状態、開状態となる（閉−開−開モード）。
【００４９】
次に、７６ステップまで戻すと、図５（ｄ）に示すように、第１の弁体８１、および第２の弁体９１の双方が時計周りＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、開状態、開状態、閉状態となる（開−開−閉モード）。
【００５０】
次に、４０ステップまで戻すと、図５（ｃ）に示すように、第１の弁体８１、および第２の弁体９１の双方が時計周りＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、閉状態、開状態となる（閉−閉−開モード）。
【００５１】
次に、４ステップまで戻すと、図５（ｂ）に示すように、第１の弁体８１、および第２の弁体９１の双方が時計周りＣＷに回転するため、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、開状態、閉状態となる（閉−開−閉モード）。
【００５２】
さらに１８８ステップになると、図５（ｈ）に示す状態で停止し、流出口２２ａ、２２ｂ、２２ｃはそれぞれ、閉状態、開状態、閉状態のままである。
【００５３】
このように本形態の弁体駆動装置１では、共通の駆動機構４が第１の弁体８１を駆動すると、第１の弁体８１は、第１の流出口２２ａ、２２ｂの２つの開口を開閉して、双方が閉状態の閉−開モード、双方が開状態の開−開モード、一方が開状態で他方が閉状態の開―閉モード、一方が閉状態で他方が開状態の閉−開モードからなる４つのモードを実現する。また、共通の駆動機構４が第２の弁体９１を駆動すると、第２の流出口２２ｃでの開モードと閉モードとからなる２つのモードに、流出口２２ａ、２２ｂでの４つのモードとを組み合わせた８つのモードが可能となる。但し、本形態では、流出口２２ａ、２２ｂの開閉状態は、駆動方向が正方向および逆方向のいずれにおいても、ステッピングモータ５のステップ数と完全に一致しているが、流出口２２ｃの開閉状態は、駆動方向が正方向であるときと、逆方向のときとでは、遊び機構４１（組み合わせ切換機構）によって、ステッピングモータ５のステップ数に対してずらしてあるので、８つのモードを共通の駆動機構４による正方向への駆動区間に全てを割り付る必要がなく、正方向への駆動区間には、６つのモードを割り付ける一方、逆方向への駆動区間に残り２つのモードを出現させることができる。それ故、１つのモードに割り付ける区間が広いので、装置を大型化しなくても、多くの開閉モードを確実に実行できる。
【００５４】
また、本形態では、組み合わせ切換機構として遊び機構４１を利用したので、広い区間の任意にタイミングで駆動方向を切り換えたときに第２の弁体９１への駆動伝達を所定期間、遮断できるため、逆方向への駆動によって出現するモードに移行する際に駆動時間が短く済むという利点がある。
【００５５】
すなわち、図４（ａ）に示す原点位置から、
（１）閉―閉―閉モード
（２）閉―閉―開モード
（３）閉―開―閉モード
（４）閉―開―開モード
（５）開−閉−閉モード
（６）開−閉−開モード
（７）開−開−閉モード
（８）開−開−開モード
に移行する場合には、それぞれ
（１）４ステップ以下の駆動後、４０ステップで停止
（２）７６ステップ以上の駆動後、４０ステップで停止
（３）７６ステップ以下の駆動後、１１２ステップで停止
（４）１４８ステップ以上の駆動後、１１２ステップで停止
（５）１４８ステップ以下の駆動後、１８４ステップで停止
（６）１１２ステップ以下の駆動後、１４８ステップで停止
（７）１１２ステップ以上の駆動後、７６ステップで停止
（８）４０ステップ以下の駆動後、７６ステップで停止
で条件で駆動すればよい。
【００５６】
また、上記モードのうち、（３）閉―開―閉モードに移行する場合には、４０ステップ以上の駆動後、４ステップで停止する条件でもよい。さらに、（５）開−閉−閉モードに移行する場合には、１８４ステップ以上の駆動後、１４８ステップで停止してもよい。
【００５７】
（その他の実施の形態）
上記形態では、駆動方向をを切り換えたときに第２の弁体９１への駆動伝達を所定期間、遮断する遊び機構４１を構成したが、駆動方向をを切り換えたときに第１の弁体８１への駆動伝達を所定期間、遮断する構成であってもよい。
また、第１の弁体８１が２つの第１の開口を制御し、第２の弁体９１が１つの第２の開口を制御する構成であったが、第１の弁体８１が単数あるいは複数の第１の開口を制御し、第２の弁体９１が単数あるいは複数の第２の開口を制御する弁体駆動装置であれば、他の構成の弁体駆動装置に本発明を適用してもよい。
【００５８】
さらに、上記形態では、開閉状態の組み合わせ切換機構として、遊び機構４１を利用したが、クラッチ機構や各種形状のカムや歯車を用いて、位相を変える機構を組み合わせ切換機構として利用してもよい。
【００５９】
【発明の効果】
以上説明したように、本発明では、例えば、８つのモードを共通の駆動機構による正方向への駆動区間に全てを割り付るのではなく、正方向への駆動区間には５つのモードのみを割り付ける一方、組み合わせ切換機構によって、逆方向への駆動区間に残り３つのモードを出現させる。それ故、１つのモードに割り付ける区間が広いので、装置を大型化しなくても、多くの開閉モードを確実に実行できる。
【図面の簡単な説明】
【図１】（ａ）および（ｂ）は、本発明に係る弁体駆動装置の断面図および弁体駆動装置の弁体機構を示す図である。
【図２】（ａ）ないし（ｌ）は、本発明に係る弁体駆動装置の第２のディスク弁の平面図、Ａ−Ａ断面図、底面図、弁体駆動装置の第２のディスク弁の第２の歯車の平面図、第２の歯車のＢ−Ｂ断面図、第２の歯車の底面図、センターブッシュの平面図、センターブッシュのＣ−Ｃ断面図、センターブッシュの底面図、パッドの平面図、パッドのＤ−Ｄ断面図、およびパッドの底面図である。
【図３】本発明に係る弁体駆動装置おいて、第２のディスク弁の組み合わせ切換機構（遊び機構）を示した説明図である。
【図４】（ａ）ないし（ｈ）は、本形態に係る弁体駆動装置において、ステッピングモータを正方向に回転させたときの各開閉モードの説明図である。
【図５】（ａ）ないし（ｈ）は、本形態に係る弁体駆動装置において、ステッピングモータを逆方向に回転させたときの各開閉モードの説明図である。
【図６】従来の弁体駆動装置の説明図である。
【符号の説明】
１ 弁体駆動装置
２ 弁座プレート
２２ａ、２２ｂ 流出口（第１の開口）
２２ｃ 流出口（第２の開口）
３ 密閉ケース
４ 弁体駆動機構
４１ 遊び機構（組み合わせ切換機構）
５ ステッピングモータ
５１２ ピニオン
２１ 流入口
８ 第１のディスク弁
８１ 第１の弁体
８２ 第１の歯車
９ 第２のディスク弁
９１ 第２の弁体
９１１ センターブッシュ
９１２ 円筒本体
９１３ 大径部
９１６ 係合突起
９２０ パッド
９３ 第２の歯車
９３２ 溝[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a valve drive device for distributing fluid by opening and closing a plurality of openings with a valve.
[0002]
[Prior art]
In a refrigerator, for example, a valve device for distributing a common refrigerant for cooling a plurality of refrigerators and cooling each refrigerator, the refrigerant supplied from an inlet is distributed to each refrigerator through a plurality of outlets. A multi-way valve such as a three-way valve, a four-way valve, and a five-way valve is used.
[0003]
Among these multi-way valves, for example, in a valve driving device used for a three-way valve, as shown in FIG. 6, an inlet 103 into which a refrigerant flows, and a flow through which a refrigerant supplied from the inlet 103 flows out. The outlets 104a and 104b are located in a sealed case 110, in which a flat disk valve 105 is also arranged. Here, the disc valve 105 includes a valve body 106 (a region shown by oblique lines in FIG. 6) for closing the outlets 104a and 104b, and a gear 107 formed integrally with the valve body 106. The gear 107 is engaged with a pinion 108 driven by a stepping motor (not shown) that can rotate forward and reverse. Therefore, when the stepping motor drives the pinion 108 in the clockwise CW direction or the counterclockwise CCW direction, the rotation is transmitted to the valve 106 via the gear 107. As a result, the outlets 104a and 104b are opened and closed, respectively, resulting in a closed-close mode in which both are closed, an open-open mode in which both are open, an open-close mode in which one is open and the other is closed, Four modes including a closed-open mode in which one is closed and the other is open can be realized. If one outlet is added and the shape of the valve body is changed, eight modes can be realized.
[0004]
[Problems to be solved by the invention]
However, in order to realize a plurality of modes for opening and closing the disk valve, for example, eight modes, it is necessary to divide the rotation angle range of the valve body 106 into eight, so that a sufficient section cannot be set in each mode. There is. In other words, simply closing the outlets in the open state and then completely closing the outlets requires rotating the disk valve over a predetermined angle range by the size of the outlets, and sufficiently closing the outlets. This is because the mode cannot be switched without certainty unless the valve is moved a certain distance away from the valve. Therefore, in the valve body driving device as shown in FIG. 6, as long as the size is not greatly increased, it is limited to set seven stop points within the rotation angle range of 282 ° and secure seven modes.
[0005]
Even when two valve bodies are used, the rotation angle range is divided by the number of modes from the viewpoint of one valve body, so it is difficult to increase the number of modes.
[0006]
In view of the above problems, an object of the present invention is to provide a valve body driving device that can increase the number of open / close modes of an opening without hindering miniaturization and that can reliably realize each mode. .
[0007]
[Means for Solving the Problems]
In order to solve the above problems, in a valve body driving device according to the present invention, a first valve body for opening and closing a single or a plurality of first openings, and a valve body for opening and closing a single or a plurality of second openings. , And the first valve body and the second valve body are bidirectionally driven to switch the first opening and the second opening to an open state or a closed state, respectively. A common drive mechanism, and further, when the first valve body and the second valve body are driven in the forward direction by the common drive mechanism, and when the first drive body is driven by the common drive mechanism. The first opening and closing state of the first opening that is switched by the first valve body and the switching by the second valve body between when the valve body and the second valve body are driven in opposite directions. A combination for changing a combination with the open / close state of the second opening Characterized in that it has a conversion mechanism. In the present invention, the total number of the first openings and the second openings is, for example, three or more.
[0008]
In the present invention, for example, when the first valve body opens and closes two first openings and the second valve body opens and closes one second opening, the common drive mechanism is the first valve body. For example, when the first valve body opens and closes two first openings, both of them are closed-closed mode, both are open-opened, and one is open and the other is open. Realizes four modes including a closed-open mode and a closed-open mode in which one is closed and the other is open. Further, when the common drive mechanism drives the second valve element, the two modes consisting of the open mode and the closed mode at the second opening are combined with the four modes at the two first openings. Eight modes are possible. However, in the present invention, these eight modes are not all assigned to the forward drive section by the common drive mechanism. For example, only five modes are assigned to the forward drive section. The remaining three modes appear in the drive section in the reverse direction by the combination switching mechanism. Therefore, since a section allocated to one mode is wide, many open / close modes can be reliably executed without increasing the size of the apparatus.
[0009]
In the present invention, for example, when the common drive mechanism reverses the drive direction of the first valve body and the second valve body from the forward direction to the reverse direction, and When the vehicle is reversed in the forward direction from the direction, it is constituted by a play mechanism that shuts off a predetermined section, the drive transmission from the common drive mechanism to the first valve body, or the drive transmission to the second valve body. be able to. With this configuration, when the driving direction of the second valve body is reversed from the forward direction to the reverse direction over a wide section, and when the driving direction is reversed from the reverse direction to the forward direction, the first or second valve is moved. Since the drive transmission to the body is interrupted for a predetermined period, there is an advantage that the drive time is short when shifting to the mode that appears by driving in the reverse direction.
[0010]
In the present invention, it is preferable that the common drive mechanism includes a stepping motor as a drive source, and controls the stop positions of the first valve body and the second valve body by the number of steps for the stepping motor. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An example of a valve body driving device to which the present invention is applied will be described with reference to the drawings.
[0012]
(overall structure)
1A and 1B are a cross-sectional view of a valve body driving device according to the present invention and a diagram showing a valve body mechanism of the valve body driving device. 2 (a) to 2 (l) are a plan view, a cross-sectional view taken along the line AA, and a bottom view of a second disk valve of the valve body driving device according to the present invention, and a second disk valve of the second disk valve of the valve body driving device. 2 is a plan view of the gear 2, a BB sectional view of the second gear, a bottom view of the second gear, a plan view of the center bush, a CC sectional view of the center bush, a bottom view of the center bush, and a plane of the pad. FIG. 4 is a cross-sectional view of the pad, taken along the line DD, and a bottom view of the pad.
[0013]
1 (a) and 1 (b), in a valve body driving device 1 of the present embodiment, a valve seat plate 2 made of a metal plate or the like is hermetically sealed with a hermetically sealed case 3, and inside and outside of the hermetically sealed case 3. Is provided with a stepping motor 5 for driving a disk valve described later. In the stepping motor 5, the rotor 51 is arranged inside the sealed case 3, while the stator 52 is arranged on the outer peripheral side of the sealed case 3. A signal line 522 is drawn from the fixed coil 521 of the stator 52, and a control unit (not shown) including a microcomputer outputs a drive signal to the signal line 522 according to a control algorithm, whereby the rotor 51 is driven. The rotation in the forward or reverse direction and the stop are controlled.
[0014]
The rotor 51 is rotatably supported on a rotor support shaft 513. A pinion 512 is also rotatably supported by the rotor support shaft 513, and the pinion 512 can rotate integrally with the rotor 51.
[0015]
The lower end side of the closed case 3 is larger in diameter than the upper end side, has a step for mounting the stator 52, and is in close contact with the step formed on the outer peripheral edge of the valve seat plate 2. ing.
[0016]
As shown in FIG. 1A, the valve seat plate 2 is formed with three outlets 22a, 22b, 22c and an inlet 21. The three outlets 22a, 22b, 22c communicate with the first, second and third inflow pipes 7a, 7b, 7c inserted into the valve seat plate 2, respectively. It communicates with the inflow pipe 6 inserted in the second. Therefore, the refrigerant introduced from the inlet 21 into the closed case 3 flows out from the outlets 22a, 22b, 22c.
[0017]
On the upper surface of the valve seat plate 2, a first disk valve 8 and a second disk valve 9 are arranged on both sides of the pinion 512, and these disk valves 8 and 9 are fixed to the base plate 2 by a leaf spring 10. Biased to the side.
[0018]
The first disk valve 8 is located near the outlets 22 a and 22 b (first openings) formed in the valve seat plate 2, and is arranged coaxially with the rotation axis of the first disk valve 8. It is rotatably supported by the valve body support shaft 11. The first disc valve 8 includes a first valve body 81 and a first gear 82 formed integrally with the first valve body 81. The first gear 82 meshes with a pinion 512 that rotates integrally with the rotor 51 of the stepping motor 5.
[0019]
Therefore, when the stepping motor 5 is driven, its rotation is transmitted to the first valve body 81 via the pinion 512 and the first gear 82. In the present embodiment, the outlets 22 a and 22 b are opened and closed by the first valve body 81.
[0020]
The second disk valve 9 is located near an outlet 22 c (second opening) formed in the valve seat plate 2, and is disposed coaxially with the rotation axis of the second disk valve 9. It is rotatably supported by the body support shaft 12.
[0021]
Here, as shown in FIGS. 2A to 2C, the second disk valve 9 has a second valve body 91 and a second gear 93. The second gear 93 meshes with a pinion 512 that rotates integrally with the rotor 51 of the stepping motor 5. Therefore, when the stepping motor 5 is driven, its rotation is transmitted to the second valve element 91 via the pinion 512 and the second gear 93. In the present embodiment, the outlet 22c is opened and closed by the second valve element 91.
[0022]
In this manner, in the present embodiment, while the stepping motor 5, the pinion 512, the first gear 82, and the second gear 93 reduce the speed, the first valve body 81 and the second valve body 91 are driven. Drive mechanism 4 is configured.
[0023]
(Configuration of combination switching mechanism)
In the present embodiment, the common drive mechanism 4 includes a stepping motor 5 that drives the valve body 81 and the valve body 91 in the forward direction and a stepping motor 5 that drives the valve body 81 and the valve body 91 in the reverse direction. Combination switching that changes the combination of the open / closed state of the outlets 22a and 22b switched by the first valve body 81 and the open / closed state of the outlet 22c switched by the second valve body 91 between the time when the opening and closing are performed. A mechanism is configured, and the configuration of such a combination switching mechanism will be described with reference to FIGS. In the following description, when the pinion 512 is rotated clockwise CW by the stepping motor 5, as a result, when the first and second gears 82 and 93 rotate counterclockwise CCW, the rotation is defined as forward rotation. 5 causes the pinion 512 to rotate counterclockwise CCW, and consequently the first and second gears 82 and 93 to rotate clockwise CW.
[0024]
FIG. 3 is a view showing a combination switching mechanism of the second disk valve in the valve body driving device according to the present invention.
[0025]
In this embodiment, in order to constitute a combination switching mechanism, the second disk valve 9 shown in FIGS. 2A to 2C includes a second gear 93 shown in FIGS. It comprises a center bush 911 shown in FIGS. 2 (g) to 2 (i) and a pad 920 shown in FIGS. 2 (j) to 2 (l).
[0026]
The center bush 911 includes a cylindrical main body 912 formed in a hollow cylinder, and a large-diameter portion 913 formed on the outer peripheral surface of the cylindrical main body 912. The cylindrical main body 912 is formed with a shaft hole 914 that penetrates the cylindrical main body 912 in the axial direction, and the valve body support shaft 12 shown in FIG. The large-diameter portion 913 has three cylindrical crimping protrusions 915 formed on one end surface. In the center bush 911, an engagement protrusion 916 is formed around the cylindrical main body 912, and the engagement protrusion 916 protrudes from the large diameter portion 913 in the axial direction.
[0027]
The pad 920 is formed in a disk shape, and one end face is formed flat, while the other end face is formed with a convex portion (a region shown by oblique lines in (l) of FIG. 2) 923. The convex portion 923 serves as a valve for closing the outlet 22c. An insertion hole 921 for inserting the cylindrical body 912 of the center bush 911 is formed in the center portion of the pad 920, and corresponds to the caulking projection 915 of the large diameter portion 913 of the center bush 911 around the insertion hole 921. A crimping hole 922 is formed at the position where the heat is applied.
[0028]
Therefore, if the center bush 911 is inserted into the pad 920 and the caulking protrusion 915 is swaged in this state, the pad 920 and the center bush 911 are integrated, and the second valve body 91 is configured. In the state where the second valve body 91 is configured as described above, the engagement protrusion 916 is in a state of protruding from the center bush 911.
[0029]
A center hole 931 having an inner diameter slightly larger than the outer diameter of the cylindrical body 912 of the center bush 911 is formed at the center of the second gear 93, and the cylindrical body of the second valve element 91 is formed in the center hole 931. By inserting the 912, the second gear 93 and the second valve element 91 are connected to each other, and the second disk valve 9 is configured.
[0030]
In the state where the second disk valve 9 is configured in this manner, the second gear 93 is formed with an arc-shaped groove 932 that is connected to the center hole 931, while the center that forms the second valve body 91. The engagement protrusion 916 protruding from the bush 911 enters the groove 932 of the second gear 93.
[0031]
Here, the groove 932 is longer than the engagement protrusion 916. Therefore, as shown in FIG. 3A, the pinion 512 is rotated counterclockwise in a state where the inner wall 932b located at the end of the groove 932 on the counterclockwise CCW side is in contact with the engagement protrusion 916. When the second gear 93 rotates in the clockwise direction CW at the time of the reverse rotation, the engagement protrusion 916 is pressed against the inner wall 932b of the groove 932, and the rotation of the second gear 93 causes the rotation of the second valve body. The second valve element 91 rotates clockwise CW.
[0032]
On the other hand, in the state shown in FIG. 3A, when the second gear 93 rotates in the counterclockwise direction CCW during the forward rotation in which the pinion 512 rotates clockwise CW, the state shown in FIG. The inner wall 932b moves in a direction away from the engagement protrusion 916 until the state shown in FIG. 3C is reached via the state shown in FIG. 3C, while the inner wall 932a located at the end of the groove 932 on the clockwise CW side. Only comes close to and comes into contact with the engagement protrusion 916, and the rotation of the second gear 93 is not transmitted to the second valve body 91. Therefore, the second valve body 91 does not rotate.
[0033]
Conversely, as shown in FIG. 3C, when the inner wall 932a located at the end of the groove 932 on the clockwise CW side is in contact with the engagement protrusion 916, the pinion 512 is rotated clockwise CW. When the second gear 93 rotates in the counterclockwise direction CCW during the forward rotation, the engagement protrusion 916 is pressed against the inner wall 932 a of the groove 932, and the rotation of the second gear 93 causes the rotation of the second valve. The second valve body 91 is transmitted to the body 91 and rotates counterclockwise CCW.
[0034]
On the other hand, in the state shown in FIG. 3C, when the second gear 93 rotates in the clockwise direction CW during the reverse rotation in which the pinion 512 rotates counterclockwise CCW, the state shown in FIG. The inner wall 932a moves in a direction away from the engagement protrusion 916 until the state shown in FIG. 3A is reached via the state shown in FIG. The rotation of the second gear 93 is not transmitted to the second valve body 91. Therefore, the second valve body 91 does not rotate.
[0035]
In this manner, in the present embodiment, when the driving direction of the valve elements 81 and 91 is reversed by the stepping motor 5 from the forward direction to the reverse direction, and when the drive direction is reversed from the reverse direction to the forward direction, A play mechanism 41 for interrupting drive transmission from the stepping motor 5 to the second valve body 91 is configured, and the play mechanism 41 configures a combination switching mechanism.
[0036]
On the other hand, in the first disk valve 8, since the first gear 82 meshing with the pinion 512 and the first valve body 81 are integral with each other, when the pinion 512 rotates clockwise CW, , And the reverse rotation of the counterclockwise rotation CCW, since the first valve body 81 is always mechanically connected to the pinion 512, the first valve body 81 always rotates in conjunction with the pinion 512. I do.
[0037]
(Operation explanation)
The operation of the present embodiment will be described with reference to FIGS. 4 and 5. In the following description, each mode is represented by the state of the outlet 22a, the state of the outlet 22b, and the state of the outlet 22c. For example, when the outflow port 22a is in the open state, the outflow port 22b is in the open state, and the outflow port 22c is in the closed state, the open-open-close mode is represented.
[0038]
FIGS. 4A to 4H show that the pinion 512 is rotated clockwise CW by the stepping motor 5 in the valve body driving device according to the present embodiment, and as a result, the first and second gears 82 and 93 rotate counterclockwise. It is explanatory drawing of each opening / closing mode at the time of the forward rotation which rotates clockwise CCW. FIGS. 5A to 5H show that the pinion 512 is rotated counterclockwise CCW by the stepping motor 5 in the valve body driving device according to the present embodiment, and as a result, the first and second gears 82 and 93 are rotated. It is explanatory drawing of each opening / closing mode at the time of reverse rotation which rotates clockwise CW.
[0039]
4A to 4H, first, the state in which the engagement protrusion 916 of the second disk valve 9 is in contact with the inner wall 932b located at the end of the groove 932 on the counterclockwise CCW side is referred to as the origin. When the stepping motor 5 rotates the pinion 512 clockwise CW by four steps from this state, the first valve body 81 rotates counterclockwise CCW. Since the drive transmission of the second valve element 91 via the pinion 512 and the second gear 93 is cut off by the play mechanism 41, the second valve element 91 does not rotate. Therefore, as shown in FIG. 4B, the outlets 22a, 22b, and 22c are closed, open, and closed, respectively (closed-open-closed mode).
[0040]
Next, in step 40, as shown in FIG. 4C, the first valve body 81 rotates counterclockwise CCW, but the second valve body 91 does not rotate, so that the outlets 22a, 22b, Reference numeral 22c indicates a closed state, a closed state, and a closed state, respectively (closed-closed-closed mode).
[0041]
Next, in step 76, as shown in FIG. 4D, both the first valve body 81 and the second valve body 91 rotate counterclockwise CCW, so that the outlets 22a, 22b, 22c Are open, open, and open, respectively (open-open-open mode).
[0042]
Next, in step 112, as shown in FIG. 4 (e), both the first valve body 81 and the second valve body 91 rotate counterclockwise CCW, so that the outlets 22a, 22b, 22c Are closed, open, and open, respectively (closed-open-open mode).
[0043]
Next, in step 148, as shown in FIG. 4 (f), both the first valve body 81 and the second valve body 91 rotate counterclockwise CCW, so that the outlets 22a, 22b, The outlets 22c are opened, closed, and open, respectively (open-close-open mode).
[0044]
Next, in step 184, as shown in FIG. 4 (g), both the first valve body 81 and the second valve body 91 rotate counterclockwise CCW, but the outflow ports 22a, 22b, 22c Remain open, closed, and closed, respectively (open-close-close mode).
[0045]
When 188 steps are reached, the operation stops in the state shown in FIG. 4H, and the outlets 22a, 22b, and 22c remain open, closed, and closed, respectively.
[0046]
On the other hand, in FIGS. 5A to 5H, a state in which the engagement protrusion 916 of the second disk valve 9 is in contact with the inner wall 932a located at the end of the groove 932 on the clockwise CW side. When the stepping motor 5 rotates in the reverse direction from the state shown in FIGS. 4H and 5H and returns the pinion 512 to the counterclockwise CCW until 184 steps, the first valve body 81 rotates clockwise. The second valve element 91 does not rotate because the drive transmission via the pinion 512 and the second gear 93 is cut off to the second valve element 91 by the play mechanism 41 by the play mechanism 41. . Therefore, as shown in FIG. 5 (g), the outlets 22a, 22b, 22c are in an open state, a closed state, and a closed state, respectively (open-close-close mode).
[0047]
Next, when returning to step 148, as shown in FIG. 5F, the first valve body 81 rotates clockwise CW, but the second valve body 91 does not rotate, so that the outlets 22a, 22b are not rotated. , 22c remain open, closed, and closed, respectively (open-close-close mode).
[0048]
Next, when returning to step 112, as shown in FIG. 5 (e), since both the first valve body 81 and the second valve body 91 rotate clockwise CW, the outlets 22a, 22b, Reference numeral 22c indicates a closed state, an open state, and an open state, respectively (closed-open-open mode).
[0049]
Next, when returning to step 76, as shown in FIG. 5D, both the first valve body 81 and the second valve body 91 rotate clockwise CW, so that the outlets 22a, 22b, Reference numeral 22c indicates an open state, an open state, and a closed state, respectively (open-open-close mode).
[0050]
Next, when returning to step 40, as shown in FIG. 5C, both the first valve body 81 and the second valve body 91 rotate clockwise CW, so that the outlets 22a, 22b, Reference numeral 22c indicates a closed state, a closed state, and an open state, respectively (closed-closed-open mode).
[0051]
Next, when returning to four steps, as shown in FIG. 5B, both the first valve body 81 and the second valve body 91 rotate clockwise CW, so that the outlets 22a, 22b, Reference numeral 22c indicates a closed state, an open state, and a closed state, respectively (closed-open-closed mode).
[0052]
When 188 steps are reached, the operation stops in the state shown in FIG. 5H, and the outlets 22a, 22b, and 22c remain in the closed state, the open state, and the closed state, respectively.
[0053]
As described above, in the valve body driving device 1 of the present embodiment, when the common drive mechanism 4 drives the first valve body 81, the first valve body 81 closes the two openings of the first outlets 22a and 22b. Open and close, closed-open mode in which both are closed, open-open mode in which both are open, open-closed mode in which one is open and the other is closed, closed in which one is closed and the other is open -Implement four modes: open mode. When the common drive mechanism 4 drives the second valve element 91, the two modes including the open mode and the closed mode at the second outlet 22c are switched to the four modes at the outlets 22a and 22b. 8 modes are possible. However, in the present embodiment, the open / closed state of the outlets 22a and 22b completely matches the number of steps of the stepping motor 5 in both the forward and reverse drive directions, but the open / closed state of the outlet 22c. Is different from the number of steps of the stepping motor 5 by the play mechanism 41 (combination switching mechanism) when the driving direction is the forward direction and when the driving direction is the reverse direction. There is no need to allocate all of the drive sections in the forward direction by the mechanism 4, and six modes are assigned to the drive section in the forward direction, while the remaining two modes appear in the drive section in the reverse direction. Can be. Therefore, since a section allocated to one mode is wide, many open / close modes can be reliably executed without increasing the size of the apparatus.
[0054]
Further, in the present embodiment, since the play mechanism 41 is used as the combination switching mechanism, the drive transmission to the second valve body 91 can be cut off for a predetermined period when the drive direction is switched at an arbitrary timing in a wide section, There is an advantage that the driving time is short when shifting to the mode that appears by driving in the reverse direction.
[0055]
That is, from the origin position shown in FIG.
(1) Close-close-close mode
(2) Close-close-open mode
(3) Close-open-close mode
(4) Close-open-open mode
(5) Open-close-close mode
(6) Open-close-open mode
(7) Open-open-close mode
(8) Open-open-open mode
If you move to
(1) Stop at 40 steps after driving 4 steps or less
(2) Stop at 40 steps after driving over 76 steps
(3) After driving for 76 steps or less, stop at 112 steps
(4) Stop at 112 steps after driving 148 steps or more
(5) After 148 steps or less, stop at 184 steps
(6) Stop at 148 steps after driving for 112 steps or less
(7) After driving 112 steps or more, stop at 76 steps
(8) Stops at 76 steps after driving for 40 steps or less
It is sufficient to drive under the condition.
[0056]
Further, in the above-mentioned mode, in the case of shifting to the (3) close-open-close mode, a condition that the drive is stopped in four steps after the drive of 40 steps or more may be employed. Further, (5) when shifting to the open-close-close mode, the drive may be stopped at 148 steps after driving for 184 steps or more.
[0057]
(Other embodiments)
In the above-described embodiment, the play mechanism 41 is configured to cut off the drive transmission to the second valve element 91 for a predetermined period when the driving direction is switched, but the first valve element 81 is switched when the driving direction is switched. The configuration may be such that the drive transmission to the motor is interrupted for a predetermined period.
Further, the first valve body 81 controls two first openings, and the second valve body 91 controls one second opening. However, the first valve body 81 may be singular or If the second valve element 91 controls a plurality of first openings and the second valve element 91 controls a single or a plurality of second openings, the present invention is applied to a valve element driving apparatus having another configuration. You may.
[0058]
Further, in the above embodiment, the play mechanism 41 is used as the combination switching mechanism in the open / close state. However, a mechanism that changes the phase using a clutch mechanism or cams or gears of various shapes may be used as the combination switching mechanism.
[0059]
【The invention's effect】
As described above, in the present invention, for example, instead of allocating all eight modes to the positive driving section by the common driving mechanism, only five modes are allocated to the positive driving section. On the other hand, the remaining three modes appear in the drive section in the reverse direction by the combination switching mechanism. Therefore, since a section allocated to one mode is wide, many open / close modes can be reliably executed without increasing the size of the apparatus.
[Brief description of the drawings]
FIGS. 1A and 1B are a cross-sectional view of a valve body driving device according to the present invention and a diagram showing a valve body mechanism of the valve body driving device.
FIGS. 2A to 2L are a plan view, a cross-sectional view taken along the line AA, and a bottom view of a second disk valve of the valve element driving device according to the present invention, and a second disk valve of the valve element driving device. Of the second gear, BB sectional view of the second gear, bottom view of the second gear, plan view of the center bush, CC sectional view of the center bush, bottom view of the center bush, pad FIG. 2 is a plan view, a DD cross-sectional view of the pad, and a bottom view of the pad.
FIG. 3 is an explanatory view showing a combination switching mechanism (play mechanism) of a second disc valve in the valve body driving device according to the present invention.
FIGS. 4A to 4H are explanatory diagrams of each opening / closing mode when the stepping motor is rotated in the forward direction in the valve body driving device according to the present embodiment.
FIGS. 5A to 5H are explanatory diagrams of each opening / closing mode when the stepping motor is rotated in a reverse direction in the valve body driving device according to the present embodiment.
FIG. 6 is an explanatory diagram of a conventional valve element driving device.
[Explanation of symbols]
1 Valve drive
2 Valve seat plate
22a, 22b Outlet (first opening)
22c Outflow port (second opening)
3 sealed case
4 Valve drive mechanism
41 Play mechanism (combination switching mechanism)
5 Stepping motor
512 pinion
21 Inlet
8 First disk valve
81 First valve body
82 1st gear
9 Second disk valve
91 Second valve body
911 center bush
912 cylindrical body
913 Large diameter part
916 engaging projection
920 pad
93 Second gear
932 groove

Claims (4)

単数あるいは複数の第１の開口を開閉するための第１の弁体と、単数あるいは複数の第２の開口を開閉するための第２の弁体と、前記第１の弁体および前記第２の弁体を双方向に駆動して前記第１の開口、および前記第２の開口を各々、開状態あるいは閉状態に切り換える共通の駆動機構とを有し、
さらに、前記共通の駆動機構により前記第１の弁体および前記第２の弁体が正方向に駆動されたときと、前記共通の駆動機構により前記第１の弁体および前記第２の弁体が逆方向に駆動されたときとの間で、前記第１の弁体によって切り換えられる前記第１の開口の開閉状態と、前記第２の弁体によって切り換えられる前記第２の開口の開閉状態との組み合わせを変える組み合わせ切換機構を有していることを特徴とする弁体駆動装置。A first valve body for opening and closing one or more first openings, a second valve body for opening and closing one or more second openings, the first valve body and the second valve body; A common drive mechanism that drives the valve body bidirectionally to switch the first opening and the second opening to an open state or a closed state, respectively.
Furthermore, when the first valve body and the second valve body are driven in the forward direction by the common drive mechanism, and when the first valve body and the second valve body are driven by the common drive mechanism. Is opened and closed by the first valve body, and opened and closed by the second valve body between when the is driven in the opposite direction. Characterized in that it has a combination switching mechanism for changing the combination of. 請求項１において、前記第１の開口および前記第２の開口の合計数が３以上であることを特徴とする弁体駆動装置。The valve drive device according to claim 1, wherein the total number of the first openings and the second openings is three or more. 請求項１または２において、前記組み合わせ切換機構は、前記共通の駆動機構が前記第１の弁体および前記第２の弁体に対する駆動方向を正方向から逆方向に駆動方向を反転したとき、および逆方向から正方向に反転したときに、所定の区間、前記共通の駆動機構から前記第１の弁体への駆動伝達、あるいは前記第２の弁体への駆動伝達を遮断する遊び機構を備えていることを特徴とする弁体駆動装置。3. The combination switching mechanism according to claim 1, wherein the common drive mechanism reverses a drive direction of the first valve body and the second valve body from a forward direction to a reverse direction, and A play mechanism is provided for interrupting a predetermined section, drive transmission from the common drive mechanism to the first valve body, or drive transmission to the second valve body when the vehicle reverses from the reverse direction to the forward direction. A valve element driving device, characterized in that: 請求項１ないし３のいずれかにおいて、前記共通の駆動機構は、ステッピングモータを駆動源として備え、当該ステッピングモータに対するステップ数により、前記第１の弁体、および前記第２の弁体の停止位置を制御することを特徴とする弁体駆動装置。4. The common drive mechanism according to claim 1, wherein the common drive mechanism includes a stepping motor as a drive source, and a stop position of the first valve body and the second valve body according to the number of steps for the stepping motor. 5. The valve body drive device characterized by controlling.
JP2003083163A 2003-03-25 2003-03-25 Valve body drive device Expired - Fee Related JP4128894B2 (en)

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KR1020040020096A KR100581419B1 (en) 2003-03-25 2004-03-24 Apparatus for driving valve assembly
CNB2004100322158A CN100377480C (en) 2003-03-25 2004-03-24 Valve drive device

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KR100581419B1 (en) 2006-05-17

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