JP3821371B2 - Dehumidifier - Google Patents

Dehumidifier Download PDF

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Publication number
JP3821371B2
JP3821371B2 JP2002012491A JP2002012491A JP3821371B2 JP 3821371 B2 JP3821371 B2 JP 3821371B2 JP 2002012491 A JP2002012491 A JP 2002012491A JP 2002012491 A JP2002012491 A JP 2002012491A JP 3821371 B2 JP3821371 B2 JP 3821371B2
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air
regeneration
processing
rotor
relative humidity
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JP2003210929A (en
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康博 頭島
匠 杉浦
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Hitachi Plant Technologies Ltd
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Hitachi Plant Technologies Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1032—Desiccant wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/104—Heat exchanger wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1056—Rotary wheel comprising a reheater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1056—Rotary wheel comprising a reheater
    • F24F2203/106—Electrical reheater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1072—Rotary wheel comprising two rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1084—Rotary wheel comprising two flow rotor segments

Description

【０００１】
【発明の属する技術分野】
本発明は除湿装置に係り、特にリチウムイオン電池を製造するクリーンルームや、低湿度環境を必要とするビル設備などに用いられる除湿装置に関する。
【０００２】
【従来の技術】
ビル設備やクリーンルーム設備では、多量の外気を取り入れ、冷却コイル等で湿度を調節し、被空調室に供給している。このため、夏季などの外気湿度が高い時季は、冷却コイルの冷熱源に多大な負荷がかかるという問題がある。そこで、ビル設備やクリーンルーム設備では、外気の潜熱負荷を小さくするために、乾式の除湿装置を外気調和機として使用している。
【０００３】
乾式の除湿装置は、図５に示すように、筒状のケーシング１を有し、このケーシング１の内部が隔壁によって処理部１Ａと再生部１Ｂに隔てられている。また、ケーシング１の内部には、円盤状の除湿ロータ２と顕熱交換器３が設けられている。この除湿ロータ２と顕熱交換器３はそれぞれ所定の速度で回転し、処理部１Ａと再生部１Ｂとを交互に通過するようになっている。
【０００４】
処理部１Ａには、処理側フィルタ４と処理側ファン５が設けられ、この処理側ファン５を駆動することによって処理用エアが処理部１Ａに導入される。導入された処理用エアは、まず、処理側フィルタ４を通過して除塵された後、除湿ロータ２を通過して除湿される。除湿された処理用エアは、除湿時の吸着熱によって昇温しているので、顕熱交換器３を通過させて冷却する。これにより、除湿、冷却された処理用エアが処理部１Ａから送出される。この処理用エアは、不図示の内調機等へ供給され、この内調機で温湿度が調節された後、被空調室に給気される。
【０００５】
一方、再生部１Ｂには、再生側フィルタ６と再生側ファン７が設けられ、この再生側ファン７を駆動することによって再生部１Ｂに再生用エアが導入される。導入された再生用エアは、まず、再生側フィルタ６を通過して除塵された後、顕熱交換器３を通過して加熱される。次いで、再生用エアは、温度センサ９の検出値が所定の設定値になるように、加熱コイル８によってさらに加熱される。これにより、十分に加熱された再生用エアが除湿ロータ２に導入されるので、除湿ロータ２の除湿剤に吸着していた水分が脱着し、除湿ロータ２の除湿性能が再生される。
【０００６】
【発明が解決しようとする課題】
しかしながら、従来の除湿装置は、除湿ロータ２の再生を確実に行うため、処理部１Ａの最大負荷に合わせて、再生側ファン７による送風量と加熱コイル８による加熱温度を決定していたので、処理部１Ａの負荷が小さい場合に、再生側ファン７や加熱コイル８を無駄に稼働することになり、改善が望まれていた。
【０００７】
また、従来の除湿装置は、再生用エアによって過剰の熱が除湿ロータ２に持ち込まれるため、除湿ロータ２が高温になり、除湿ロータ２を通過した処理用エアの温度が必要以上に上昇するという問題があった。このため、処理用エアを冷却する内調機の負荷が大きくなり、省エネの観点から改善が望まれていた。
【０００８】
本発明はこのような事情に鑑みて成されたもので、省エネ性の優れた除湿装置を提供することを目的とする。
【０００９】
【課題を解決するための手段】
請求項１記載の発明は前記目的を達成するために、ケーシングの内部に処理部と再生部を有するとともに、前記処理部と前記再生部を移動する除湿ロータを備え、前記処理部に処理用エアを送気して前記除湿ロータで除湿するとともに、前記再生部に再生用エアを送気して前記除湿ロータを再生する除湿装置において、前記処理部に設けられ、前記除湿ロータに導入される処理用エアの相対湿度を検出する処理側検出手段と、前記再生部に設けられ、前記除湿ロータを通過した再生用エアの相対湿度を検出する再生側検出手段と、前記再生部の除湿ロータに導入される再生用エアの流量を調節する流量調節手段と、前記処理側検出手段の検出値に基づいて前記再生側検出手段の最適値を演算し、該最適値になるように前記流量調節手段を制御する制御手段と、を備え、前記除湿ロータを通過した処理用エアを冷却し、前記除湿ロータに送気される再生用エアを加熱する熱交換器と、該熱交換器と前記除湿ロータとの間で前記再生用エアを加熱する加熱手段とを備え、前記流量調節手段は、前記熱交換器と前記加熱手段との間に接続される分岐ダクトと、該分岐ダクトに配設されるダンパとから成り、前記制御手段は、前記ダンパの開度を調節することを特徴としている。
【００１０】
本発明によれば、処理部の除湿ロータに導入される処理用エアの相対湿度に基づいて、再生部の除湿ロータを通過した再生用エアの相対湿度の最適値を求め、この最適値となるように、再生部の除湿ロータに導入される再生用エアの流量を制御している。このような制御を行うと、除湿ロータに導入される再生用エアの流量が、処理部の負荷に応じた流量となり、エネルギー効率が上昇する。
【００１１】
本発明によれば、分岐ダクトを再生部に接続し、再生用エアの一部を分流させて排出するとともに、その排出流量をダンパで調節するようにしたので、除湿ロータへの再生用エアの流量を簡単に制御することができる。また、分岐ダクトを熱交換器と加熱手段との間に接続し、熱交換器に分流前の再生用エアが流れるようにしたので、熱交換器による処理用エアの冷却を効果的に行うことができる。また、分流後の最適流量の再生用エアが加熱手段を通過するようにしたので、加熱手段による加熱を効率よく行うことができる。
【００１４】
【発明の実施の形態】
以下、添付図面に従って本発明に係る除湿装置の好ましい実施の形態について詳説する。
【００１５】
図１は、本発明に係る除湿装置１０の構成を示す断面図である。
【００１６】
同図に示すように、除湿装置１０は円筒状のケーシング１２を有しており、このケーシング１２の内部は、隔壁１４によって処理部１６と再生部１８とに隔てられている。また、ケーシング１２の内部には、円盤状の除湿ロータ２０と顕熱交換機２２が設けられている。除湿ロータ２０は、塩化リチウムやシリカゲル等の除湿剤を含浸させたハニカム状の不織布によって構成されており、不図示の駆動手段によって所定速度で回転して、処理部１６と再生部１８とを交互に通過するようになっている。顕熱交換器２２は、所定速度で回転することによって処理部１６と再生部１８とを交互に移動し、顕熱のみの移動によって熱交換を行うように構成されている。
【００１７】
処理部１６には、処理側フィルタ２４と処理側ファン２６が設けられ、この処理側ファン２６によって、処理用エアが処理部１６に導入される。導入された処理用エアは、まず、処理側フィルタ２４を通過して除塵された後、除湿ロータ２０を通過して除湿され、さらに顕熱交換器２２を通過して冷却される。処理用エアは、除湿ロータ２０を通過した際に吸着熱によって昇温しており、顕熱交換器２２を通過した際に、再生部１８の再生用エアと熱交換して冷却される。冷却された処理用エアは、内調機（不図示）などに送気され、この内調機で温湿度調整された後、クリーンルームなどの被空調室（不図示）に供給される。
【００１８】
一方、再生部１８には、再生側フィルタ２８、再生側ファン３０、加熱コイル３２が設けられ、再生側ファン３０によって、再生用エアが再生部１８に導入される。再生用エアとしては、絶対湿度の低いエア、例えば、被空調室からの室内排気、或いは外気などが用いられる。再生部１８に導入された再生用エアは、まず、顕熱交換器２２を通過することにより、処理部１６の処理用エアと熱交換して加熱される。加熱された再生用エアは、加熱コイル３２によってさらに加熱される。加熱コイル３２は、循環ライン３４を介して不図示の加熱源に接続されており、蒸気や温水などの加熱媒体が循環するようになっている。循環ライン３４には、開度調整弁３６が配設され、この開度調整弁３６によって加熱媒体の循環流量が調節される。開度調整弁３６は、開度制御装置３８に接続され、開度制御装置３８は、加熱コイル３２の下流側に配した温度センサ４０に接続されている。開度制御装置３８は、温度センサ４０の検出値が設定温度となるように、開度調整弁３６の開度を制御する。これにより、再生用エアが設定温度に加熱され、除湿ロータ２０に導入される。再生用エアが除湿ロータ２０に導入されることによって、除湿ロータ２０に吸着していた水分が脱着され、除湿ロータ２０の除湿性能が再生される。除湿ロータ２０を通過した再生用エアは、脱着反応によって冷却された状態で外部に排気される。
【００１９】
ところで、再生部１８には、顕熱交換器２２と加熱コイル３２との間に、分岐ダクト４２が接続されており、この分岐ダクト４２にダンパ４４が配設されている。これにより、再生用エアが分岐ダクト４２から排気されるとともに、その排気流量をダンパ４４によって調節することができる。すなわち、ダンパ４４の開度を調節することによって、除湿ロータ２０に導入される再生用エアの流量を調節することができる。
【００２０】
ダンパ４４は、制御装置４６に接続されており、制御装置４６は、相対湿度センサ４８（処理側検出手段に相当）と相対湿度センサ５０（再生側検出手段に相当）に接続されている。相対湿度センサ４８は、処理部１６の除湿ロータ２０の上流側に設けられ、除湿ロータ２０に導入される処理用エアの相対湿度を検出する。また、相対湿度センサ５０は、再生部１８の除湿ロータ２０の下流側で除湿ロータ２０の近傍に、且つ、除湿ロータ２０の回転方向の終端部の隔壁１４付近に配設され、除湿ロータ２０を通過した再生用エアの相対湿度を検出する。制御装置４６は、相対湿度センサ４８、５０の検出値に基づいて、ダンパ４４の開度を調節するようになっている。具体的には、相対湿度センサ４８の検出値に基づいて、相対湿度センサ５０の検出値の最適値を求める。例えば相対湿度センサ４８の検出値よりも０〜５℃低い値を最適値として求める。そして、相対湿度センサ５０の検出値がその最適値になるように、ダンパ４４の開度を制御する。これにより、適切な流量の再生用エアが除湿ロータ２０を通過し、除湿ロータ２０の除湿性能が再生される。
【００２１】
次に上記の如く構成された除湿装置１０の作用について、図２に示す試験結果に基づいて説明する。
【００２２】
図２は、図１の除湿装置１０において、処理部１６に一定の負荷を与えながら、再生用エアの風量を変化させて試験を行った結果である。具体的には、27.8℃、42％、9.8g/kgDA の処理用エアを一定風量2000m3/hで処理部１６に送風するとともに、80℃の再生用エアを、風量を変えながら再生部１８に送風した。図２には、その際の相対湿度センサ４８の検出値（処理入口相対湿度）と、相対湿度センサ５０の検出値（終端部相対湿度）、及び、除湿ロータ２０による除湿量が示されている。
【００２３】
図２に示すように、再生風量が1500m3/hまでは、再生風量が増加するにつれて、除湿ロータ２０による除湿量も徐々に大きくなっている。これは、再生用エアの風量が増加するにつれて、除湿ロータ２０の再生量が増加し、除湿ロータ２０の除湿性能が大きく回復するからである。しかし、再生風量が1500m3/hを超えると、再生風量を増加させても除湿ロータ２０による除湿量は殆ど変化しない。したがって、再生風量を1500m3/hより大きくしても、エネルギーを無駄に消費するだけであることが分かる。これにより、エネルギー効率の良い最適制御範囲は、除湿量が変化しなくなる1500m3/hの直前であり、この範囲に再生風量を制御することが望ましい。ただし、最適な再生風量の範囲は、処理部１６の負荷（処理用エアの湿度や風量など）によって変化する。
【００２４】
一方、図２から分かるように、再生用エアの風量が増加するにつれて、除湿ロータ２０の通過後の再生用エアの相対湿度（終端部相対湿度）が低下し、前述した最適制御範囲においては、処理用エアの相対湿度（処理入口相対湿度）よりも約０〜５％低い値になっている。したがって、再生用エアの相対湿度を処理用エアの相対湿度よりも約０〜５％低くすれば、エネルギー効率を向上できることが分かる。このように、再生用エアの相対湿度を処理用エアの相対湿度に応じて調節することによって、処理用エアの状態が変化した場合にも対応することができ、確実に再生風量を最適な範囲に制御することができる。
【００２５】
本実施の形態の除湿装置１０は、除湿ロータ２０に導入される処理用エアの相対湿度を相対湿度センサ４８で検出し、この検出値よりも０〜５％低い値を最適値として求め、相対湿度センサ５０の検出値が最適値になるようにダンパ４４を制御し、加熱コイル３２への再生用エアの流量を調節している。したがって、処理用エアの相対湿度が減少した場合には、相対湿度センサ４８の検出値が小さくなって最適値が小さく修正され、これに応じて加熱コイル３２への再生用エアの流量が減少する。これにより、加熱コイル３２における再生用エアの加熱量が少なくなるので、消費エネルギー量は減少する。
【００２６】
このように除湿装置１０によれば、処理部１６の負荷に応じて、加熱コイル３２における消費エネルギー量が変化するので、常に高いエネルギー効率を維持することができる。
【００２７】
また、除湿装置１０は、分岐ダクト４２を顕熱交換器２２と加熱コイル３２との間に接続するようにしたので、顕熱交換器２２には、分流前の大きな流量の再生用エアが流れる。したがって、顕熱交換器２２によって処理用エアを効率よく冷却することができる。
【００２８】
なお、上述した実施の形態は、ダンパ４４の開度を調節することによって、加熱コイル３２への再生用エアの流量を調節したが、流量調節手段は、これに限定するものではない。例えば、再生側ファン３０としてインバータ付きのファンを使用し、再生側ファン３０による送風量そのものを変えるようにしてもよい。
【００２９】
図３は、第２の実施の形態の除湿装置の構成を示す断面図である。同図に示すように、第２の実施の形態の除湿装置は、処理部１６の除湿ロータ２０の上流側にエア状態検出装置５２（処理側エア状態検出手段に相当）が設けられるとともに、再生部１８の顕熱交換器２２の上流側にエア状態検出装置５４（再生側エア状態検出手段に相当）が設けられている。エア状態検出装置５２、５４はそれぞれ、エアの相対湿度と温度を検出するように構成されるとともに、制御装置５６（流量制御手段に相当）に接続されている。制御装置５６は、エア状態検出装置５２、５４の検出値に基づいて、再生用エアの最適流量を演算し、この最適流量の再生用エアが除湿ロータ２０に流れるようにダンパ４４の開度を調節する。
【００３０】
最適流量の演算方法としては、図４に示すように、まず、エア状態検出装置５４で検出した再生用エアの相対湿度（再生入口相対湿度）と、同じくエア状態検出装置５４で検出した再生エアの温度（再生入口温度）と、温度センサ４０で検出した再生用エアの温度（再生温度）と、さらにエア状態検出装置５２で検出した処理用エアの相対湿度（処理入口相対湿度）とから、再生用エアの出口側での理想状態（温度、相対湿度、絶対湿度）を、空気線図上で演算する。
【００３１】
一方で、エア状態検出手段５２で検出した処理用エアの相対湿度（処理入口相対湿度）、処理用エアの温度（処理入口温度）、除湿ロータ２０の入口での再生用エアの相対湿度から、処理用エアの出口側での理想状態（温度、相対湿度、絶対湿度）を空気線図上で演算する。
【００３２】
そして、これらの理想状態に基づいて、再生用エアの最適流量を算出する。制御装置５６は、ダンパ４４を開閉し、除湿ロータ２０に流れる再生用エアが最適流量となるようにする。
【００３３】
上記の如く構成された第２の実施の形態の除湿装置は、処理部１６に導入される処理用エアの状態と、再生部１８に導入される再生用エアの状態とに応じて、再生用エアの最適流量を演算し、この最適流量となるように制御を行うので、エネルギー効率よく除湿ロータ２０を再生させることができる。
【００３４】
【発明の効果】
以上説明したように本発明に係る除湿装置によれば、処理部の除湿ロータに導入される処理用エアの相対湿度に基づいて、再生部の除湿ロータを通過した再生用エアの相対湿度の最適値を求め、この最適値になるように、除湿ロータに導入される再生用エアの流量を制御したので、エネルギー効率良く除湿ロータを再生することができる。
【００３５】
また、本発明に係る除湿装置によれば、除湿ロータに導入される処理用エアの状態と再生用エアの状態とによって再生用エアの最適流量を求め、この最適流量となるように制御するので、エネルギー効率良く除湿ロータを再生することができる。
【図面の簡単な説明】
【図１】第１の実施の形態の除湿装置の構成を示す断面図
【図２】除湿装置の作用を説明する図
【図３】第２の実施の形態の除湿装置の構成を示す断面図
【図４】制御フローを説明するブロック図
【図５】従来の除湿装置の構成を示す断面図
【符号の説明】
１０…除湿装置、１２…ケーシング、１４…隔壁、１６…処理部、１８…再生部、２０…除湿ロータ、２２…顕熱交換器、２４…処理側フィルタ、２６…処理側ファン、２８…再生側フィルタ、３０…再生側ファン、３２…加熱コイル、３４…循環ライン、３６…開度調整弁、３８…開度制御装置、４０…温度センサ、４２…分岐ダクト、４４…ダンパ、４６…制御装置、４８…相対湿度センサ、５０…相対湿度センサ、５２、５４…エア状態検出装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dehumidifying device, and more particularly to a dehumidifying device used in a clean room for manufacturing a lithium ion battery, a building facility requiring a low humidity environment, or the like.
[0002]
[Prior art]
Building facilities and clean room facilities take in a large amount of outside air, adjust the humidity with a cooling coil, etc., and supply it to the air-conditioned room. For this reason, there is a problem that a great load is applied to the cooling heat source of the cooling coil in the season when the outside air humidity is high such as summer. Therefore, in building facilities and clean room facilities, in order to reduce the latent heat load of outside air, a dry-type dehumidifier is used as an outside air conditioner.
[0003]
As shown in FIG. 5, the dry dehumidifier has a cylindrical casing 1, and the inside of the casing 1 is separated by a partition into a processing section 1A and a regeneration section 1B. In addition, a disc-shaped dehumidifying rotor 2 and a sensible heat exchanger 3 are provided inside the casing 1. The dehumidifying rotor 2 and the sensible heat exchanger 3 rotate at predetermined speeds, respectively, and pass through the processing unit 1A and the regeneration unit 1B alternately.
[0004]
The processing unit 1A is provided with a processing side filter 4 and a processing side fan 5. By driving the processing side fan 5, processing air is introduced into the processing unit 1A. The introduced processing air first passes through the processing-side filter 4 and is dedusted, and then passes through the dehumidifying rotor 2 and is dehumidified. Since the dehumidified processing air is heated by the heat of adsorption during dehumidification, it is cooled by passing through the sensible heat exchanger 3. Thereby, the processing air dehumidified and cooled is sent out from the processing unit 1A. This processing air is supplied to an unillustrated internal air conditioner and the like, and after the temperature and humidity are adjusted by the internal air conditioner, the air is supplied to the air-conditioned room.
[0005]
On the other hand, the regeneration unit 1B is provided with a regeneration-side filter 6 and a regeneration-side fan 7. By driving the regeneration-side fan 7, regeneration air is introduced into the regeneration unit 1B. The introduced regeneration air first passes through the regeneration filter 6 and is dedusted, and then passes through the sensible heat exchanger 3 and is heated. Next, the regeneration air is further heated by the heating coil 8 so that the detection value of the temperature sensor 9 becomes a predetermined set value. As a result, the sufficiently heated regeneration air is introduced into the dehumidifying rotor 2, so that the moisture adsorbed on the dehumidifying agent of the dehumidifying rotor 2 is desorbed, and the dehumidifying performance of the dehumidifying rotor 2 is regenerated.
[0006]
[Problems to be solved by the invention]
However, since the conventional dehumidifier reliably determines the regeneration of the dehumidification rotor 2, the amount of air blown by the regeneration-side fan 7 and the heating temperature of the heating coil 8 are determined in accordance with the maximum load of the processing unit 1A. When the load on the processing unit 1A is small, the reproduction-side fan 7 and the heating coil 8 are used wastefully, and improvement has been desired.
[0007]
Further, in the conventional dehumidifying device, excessive heat is brought into the dehumidifying rotor 2 by the regeneration air, so that the dehumidifying rotor 2 becomes high temperature, and the temperature of the processing air that has passed through the dehumidifying rotor 2 is increased more than necessary. There was a problem. For this reason, the load of the internal air conditioner for cooling the processing air is increased, and improvement has been desired from the viewpoint of energy saving.
[0008]
This invention is made | formed in view of such a situation, and it aims at providing the dehumidification apparatus excellent in energy-saving property.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention includes a processing unit and a regenerating unit inside a casing, a dehumidification rotor that moves the processing unit and the regenerating unit, and a processing air in the processing unit. In the dehumidifying device that regenerates the dehumidification rotor by supplying the regeneration air to the regeneration unit while being dehumidified by the dehumidification rotor, the process provided in the processing unit and introduced into the dehumidification rotor Introducing the processing side detection means for detecting the relative humidity of the regenerative air, the regeneration side detection means for detecting the relative humidity of the regenerating air that has passed through the dehumidification rotor, and the dehumidification rotor of the regeneration section. A flow rate adjusting means for adjusting the flow rate of the regeneration air, and an optimum value of the regeneration side detecting means based on a detection value of the processing side detecting means, and the flow rate adjusting means being adjusted to the optimum value. control That a control means, wherein the cooling the process air that has passed through the dehumidification rotor, and a heat exchanger for heating the regeneration air to be air in the dehumidification rotor, and the dehumidification rotor and the heat exchanger Heating means for heating the regeneration air between, the flow rate adjusting means, a branch duct connected between the heat exchanger and the heating means, a damper disposed in the branch duct, And the control means adjusts the opening of the damper .
[0010]
According to the present invention, based on the relative humidity of the processing air introduced into the dehumidification rotor of the processing unit, the optimum value of the relative humidity of the regeneration air that has passed through the dehumidification rotor of the regeneration unit is obtained, and becomes this optimal value. As described above, the flow rate of the regeneration air introduced into the dehumidification rotor of the regeneration unit is controlled. When such control is performed, the flow rate of the regeneration air introduced into the dehumidification rotor becomes a flow rate according to the load of the processing unit, and the energy efficiency is increased.
[0011]
According to the present invention , the branch duct is connected to the regeneration unit, and a part of the regeneration air is shunted and discharged, and the discharge flow rate is adjusted by the damper. The flow rate can be easily controlled. In addition, since the branch duct is connected between the heat exchanger and the heating means so that the regeneration air before diversion flows to the heat exchanger, the processing air can be effectively cooled by the heat exchanger. Can do. In addition, since the regeneration air having the optimum flow rate after the diversion passes through the heating means, heating by the heating means can be performed efficiently.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a dehumidifying device according to the present invention will be described in detail with reference to the accompanying drawings.
[0015]
FIG. 1 is a cross-sectional view showing a configuration of a dehumidifying device 10 according to the present invention.
[0016]
As shown in the figure, the dehumidifying device 10 has a cylindrical casing 12, and the inside of the casing 12 is separated by a partition wall 14 into a processing unit 16 and a regeneration unit 18. In addition, a disc-shaped dehumidifying rotor 20 and a sensible heat exchanger 22 are provided inside the casing 12. The dehumidification rotor 20 is composed of a honeycomb-shaped nonwoven fabric impregnated with a dehumidifying agent such as lithium chloride or silica gel, and is rotated at a predetermined speed by a driving means (not shown) to alternate between the processing unit 16 and the regeneration unit 18. To pass through. The sensible heat exchanger 22 is configured to alternately move between the processing unit 16 and the regenerating unit 18 by rotating at a predetermined speed, and to perform heat exchange only by movement of sensible heat.
[0017]
The processing unit 16 is provided with a processing side filter 24 and a processing side fan 26, and processing air is introduced into the processing unit 16 by the processing side fan 26. The introduced processing air first passes through the processing-side filter 24 and is dedusted, then passes through the dehumidifying rotor 20, and then passes through the sensible heat exchanger 22 to be cooled. The processing air is heated by adsorption heat when it passes through the dehumidification rotor 20, and is cooled by exchanging heat with the regeneration air of the regeneration unit 18 when it passes through the sensible heat exchanger 22. The cooled processing air is sent to an internal air conditioner (not shown) and the like, and after the temperature and humidity are adjusted by the internal air conditioner, it is supplied to an air-conditioned room (not shown) such as a clean room.
[0018]
On the other hand, the regeneration unit 18 is provided with a regeneration side filter 28, a regeneration side fan 30, and a heating coil 32, and regeneration air is introduced into the regeneration unit 18 by the regeneration side fan 30. As the regeneration air, air having a low absolute humidity, for example, indoor exhaust from an air-conditioned room or outside air is used. The regeneration air introduced into the regeneration unit 18 first passes through the sensible heat exchanger 22 and is heated by exchanging heat with the treatment air of the processing unit 16. The heated regeneration air is further heated by the heating coil 32. The heating coil 32 is connected to a heating source (not shown) via a circulation line 34 so that a heating medium such as steam or hot water circulates. In the circulation line 34, an opening degree adjusting valve 36 is disposed, and the opening degree adjusting valve 36 adjusts the circulation flow rate of the heating medium. The opening degree adjustment valve 36 is connected to an opening degree control device 38, and the opening degree control device 38 is connected to a temperature sensor 40 disposed on the downstream side of the heating coil 32. The opening control device 38 controls the opening of the opening adjustment valve 36 so that the detected value of the temperature sensor 40 becomes the set temperature. As a result, the regeneration air is heated to the set temperature and introduced into the dehumidifying rotor 20. By introducing the regeneration air into the dehumidification rotor 20, the moisture adsorbed on the dehumidification rotor 20 is desorbed, and the dehumidification performance of the dehumidification rotor 20 is regenerated. The regeneration air that has passed through the dehumidifying rotor 20 is exhausted to the outside while being cooled by the desorption reaction.
[0019]
Incidentally, a branch duct 42 is connected to the regeneration unit 18 between the sensible heat exchanger 22 and the heating coil 32, and a damper 44 is disposed in the branch duct 42. Thus, the regeneration air is exhausted from the branch duct 42, and the exhaust flow rate can be adjusted by the damper 44. That is, the flow rate of the regeneration air introduced into the dehumidifying rotor 20 can be adjusted by adjusting the opening degree of the damper 44.
[0020]
The damper 44 is connected to a control device 46, and the control device 46 is connected to a relative humidity sensor 48 (corresponding to the processing side detection means) and a relative humidity sensor 50 (corresponding to the reproduction side detection means). The relative humidity sensor 48 is provided on the upstream side of the dehumidification rotor 20 of the processing unit 16 and detects the relative humidity of the processing air introduced into the dehumidification rotor 20. The relative humidity sensor 50 is disposed in the vicinity of the dehumidification rotor 20 on the downstream side of the dehumidification rotor 20 of the regeneration unit 18 and in the vicinity of the partition wall 14 at the terminal end in the rotation direction of the dehumidification rotor 20. The relative humidity of the regeneration air that has passed is detected. The control device 46 adjusts the opening degree of the damper 44 based on the detection values of the relative humidity sensors 48 and 50. Specifically, the optimum value of the detection value of the relative humidity sensor 50 is obtained based on the detection value of the relative humidity sensor 48. For example, a value 0 to 5 ° C. lower than the detection value of the relative humidity sensor 48 is obtained as the optimum value. Then, the opening degree of the damper 44 is controlled so that the detection value of the relative humidity sensor 50 becomes the optimum value. Thereby, the regeneration air having an appropriate flow rate passes through the dehumidification rotor 20, and the dehumidification performance of the dehumidification rotor 20 is regenerated.
[0021]
Next, the operation of the dehumidifier 10 configured as described above will be described based on the test results shown in FIG.
[0022]
FIG. 2 shows a result of the test performed by changing the air volume of the regeneration air while applying a constant load to the processing unit 16 in the dehumidifying apparatus 10 of FIG. Specifically, 27.8 ° C., 42%, 9.8 g / kgDA of processing air is blown to the processing unit 16 at a constant air volume of 2000 m 3 / h, and 80 ° C. regeneration air is changed while the air volume is changed. It was blown into. FIG. 2 shows the detected value of the relative humidity sensor 48 (processing inlet relative humidity), the detected value of the relative humidity sensor 50 (terminal relative humidity), and the dehumidifying amount by the dehumidifying rotor 20. .
[0023]
As shown in FIG. 2, the amount of dehumidification by the dehumidification rotor 20 gradually increases as the amount of regeneration air increases until the amount of regeneration air reaches 1500 m 3 / h. This is because the amount of regeneration of the dehumidification rotor 20 increases as the air volume of the regeneration air increases, and the dehumidification performance of the dehumidification rotor 20 greatly recovers. However, if the regeneration air volume exceeds 1500 m 3 / h, the dehumidification amount by the dehumidification rotor 20 hardly changes even if the regeneration air volume is increased. Therefore, it can be seen that even if the regeneration air volume is greater than 1500 m 3 / h, energy is only wasted. Thereby, the optimum control range with good energy efficiency is immediately before 1500 m 3 / h at which the dehumidification amount does not change, and it is desirable to control the regeneration air volume within this range. However, the optimum range of the regeneration air volume varies depending on the load of the processing unit 16 (humidity of the processing air, air volume, etc.).
[0024]
On the other hand, as can be seen from FIG. 2, as the air volume of the regeneration air increases, the relative humidity (end relative humidity) of the regeneration air after passing through the dehumidifying rotor 20 decreases, and in the above-described optimum control range, The value is about 0 to 5% lower than the relative humidity of the processing air (processing inlet relative humidity). Therefore, it can be seen that the energy efficiency can be improved by making the relative humidity of the regeneration air about 0 to 5% lower than the relative humidity of the processing air. In this way, by adjusting the relative humidity of the regeneration air in accordance with the relative humidity of the processing air, it is possible to cope with changes in the state of the processing air, and to ensure that the regeneration air volume is within the optimum range. Can be controlled.
[0025]
The dehumidifying device 10 of the present embodiment detects the relative humidity of the processing air introduced into the dehumidifying rotor 20 with the relative humidity sensor 48, obtains a value 0 to 5% lower than the detected value as an optimum value, The damper 44 is controlled so that the detection value of the humidity sensor 50 becomes an optimum value, and the flow rate of the regeneration air to the heating coil 32 is adjusted. Therefore, when the relative humidity of the processing air decreases, the detection value of the relative humidity sensor 48 becomes smaller and the optimum value is corrected to be smaller, and the flow rate of the regeneration air to the heating coil 32 decreases accordingly. . Thereby, since the heating amount of the regeneration air in the heating coil 32 is reduced, the amount of energy consumption is reduced.
[0026]
As described above, according to the dehumidifier 10, the amount of energy consumed in the heating coil 32 changes according to the load of the processing unit 16, so that high energy efficiency can always be maintained.
[0027]
Further, since the dehumidifying apparatus 10 connects the branch duct 42 between the sensible heat exchanger 22 and the heating coil 32, a large flow of regeneration air before the diversion flows to the sensible heat exchanger 22. . Therefore, the processing air can be efficiently cooled by the sensible heat exchanger 22.
[0028]
In the above-described embodiment, the flow rate of the regeneration air to the heating coil 32 is adjusted by adjusting the opening degree of the damper 44, but the flow rate adjusting means is not limited to this. For example, a fan with an inverter may be used as the regeneration-side fan 30 and the amount of air blown by the regeneration-side fan 30 itself may be changed.
[0029]
FIG. 3 is a cross-sectional view illustrating the configuration of the dehumidifying device according to the second embodiment. As shown in the figure, the dehumidifier of the second embodiment is provided with an air condition detection device 52 (corresponding to a process-side air condition detection means) on the upstream side of the dehumidification rotor 20 of the processing unit 16, and the regeneration. An air condition detection device 54 (corresponding to a regeneration-side air condition detection means) is provided on the upstream side of the sensible heat exchanger 22 in the section 18. Each of the air condition detection devices 52 and 54 is configured to detect the relative humidity and temperature of air, and is connected to a control device 56 (corresponding to a flow rate control means). The control device 56 calculates the optimum flow rate of the regeneration air based on the detection values of the air condition detection devices 52 and 54, and the opening degree of the damper 44 is adjusted so that the regeneration air having the optimum flow rate flows to the dehumidification rotor 20. Adjust.
[0030]
As shown in FIG. 4, the optimum flow rate calculation method is as follows. First, the relative humidity of the regeneration air detected by the air condition detection device 54 (regeneration inlet relative humidity) and the regeneration air detected by the air condition detection device 54 are used. Of the air (regeneration inlet temperature), the temperature of the regeneration air detected by the temperature sensor 40 (regeneration temperature), and the relative humidity of the processing air (processing inlet relative humidity) detected by the air state detection device 52, The ideal state (temperature, relative humidity, absolute humidity) on the outlet side of the regeneration air is calculated on the air diagram.
[0031]
On the other hand, from the relative humidity of the processing air (processing inlet relative humidity) detected by the air state detection means 52, the temperature of the processing air (processing inlet temperature), and the relative humidity of the regeneration air at the inlet of the dehumidification rotor 20, The ideal state (temperature, relative humidity, absolute humidity) on the outlet side of the processing air is calculated on the air diagram.
[0032]
Based on these ideal states, the optimum flow rate of the regeneration air is calculated. The control device 56 opens and closes the damper 44 so that the regeneration air flowing through the dehumidifying rotor 20 has an optimal flow rate.
[0033]
The dehumidifying device of the second embodiment configured as described above is adapted for the regeneration depending on the state of the processing air introduced into the processing unit 16 and the state of the regeneration air introduced into the regeneration unit 18. Since the optimal flow rate of air is calculated and control is performed so as to achieve this optimal flow rate, the dehumidifying rotor 20 can be regenerated with high energy efficiency.
[0034]
【The invention's effect】
As described above, according to the dehumidifying device of the present invention, the optimum relative humidity of the regenerating air that has passed through the dehumidifying rotor of the regenerating unit is based on the relative humidity of the processing air introduced into the dehumidifying rotor of the processing unit. Since the value is obtained and the flow rate of the regeneration air introduced into the dehumidification rotor is controlled so as to be the optimum value, the dehumidification rotor can be regenerated with high energy efficiency.
[0035]
Further, according to the dehumidifying device of the present invention, the optimum flow rate of the regeneration air is obtained from the state of the processing air introduced into the dehumidification rotor and the state of the regeneration air, and the control is performed so as to obtain this optimum flow rate. In addition, the dehumidifying rotor can be regenerated efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a dehumidifying apparatus according to a first embodiment. FIG. 2 is a cross-sectional view showing a configuration of a dehumidifying apparatus according to a second embodiment. FIG. 4 is a block diagram for explaining a control flow. FIG. 5 is a cross-sectional view showing a configuration of a conventional dehumidifying apparatus.
DESCRIPTION OF SYMBOLS 10 ... Dehumidification apparatus, 12 ... Casing, 14 ... Partition, 16 ... Processing part, 18 ... Regeneration part, 20 ... Dehumidification rotor, 22 ... Sensible heat exchanger, 24 ... Processing side filter, 26 ... Processing side fan, 28 ... Regeneration Side filter, 30 ... regeneration side fan, 32 ... heating coil, 34 ... circulation line, 36 ... opening adjustment valve, 38 ... opening control device, 40 ... temperature sensor, 42 ... branch duct, 44 ... damper, 46 ... control 48 ... Relative humidity sensor 50 ... Relative humidity sensor 52, 54 ... Air condition detection device

Claims (1)

ケーシングの内部に処理部と再生部を有するとともに、前記処理部と前記再生部を移動する除湿ロータを備え、前記処理部に処理用エアを送気して前記除湿ロータで除湿するとともに、前記再生部に再生用エアを送気して前記除湿ロータを再生する除湿装置において、
前記処理部に設けられ、前記除湿ロータに導入される処理用エアの相対湿度を検出する処理側検出手段と、前記再生部に設けられ、前記除湿ロータを通過した再生用エアの相対湿度を検出する再生側検出手段と、前記再生部の除湿ロータに導入される再生用エアの流量を調節する流量調節手段と、前記処理側検出手段の検出値に基づいて前記再生側検出手段の最適値を演算し、該最適値になるように前記流量調節手段を制御する制御手段と、を備え、
前記除湿ロータを通過した処理用エアを冷却し、前記除湿ロータに送気される再生用エアを加熱する熱交換器と、該熱交換器と前記除湿ロータとの間で前記再生用エアを加熱する加熱手段とを備え、前記流量調節手段は、前記熱交換器と前記加熱手段との間に接続される分岐ダクトと、該分岐ダクトに配設されるダンパとから成り、前記制御手段は、前記ダンパの開度を調節することを特徴とする除湿装置。 The casing includes a processing unit and a regenerating unit, and includes a dehumidification rotor that moves between the processing unit and the regenerating unit. The processing air is supplied to the processing unit and dehumidified by the dehumidifying rotor, and the regeneration is performed. In a dehumidifying device that regenerates the dehumidifying rotor by supplying regeneration air to the part,
A processing-side detection means for detecting the relative humidity of the processing air introduced into the dehumidification rotor provided in the processing unit, and a relative humidity of the regeneration air provided in the regeneration unit and passed through the dehumidification rotor The regeneration side detection means, the flow rate adjustment means for adjusting the flow rate of the regeneration air introduced into the dehumidification rotor of the regeneration section, and the optimum value of the regeneration side detection means based on the detection value of the processing side detection means. Control means for calculating and controlling the flow rate adjusting means so as to be the optimum value,
A heat exchanger that cools the processing air that has passed through the dehumidification rotor and heats the regeneration air sent to the dehumidification rotor, and heats the regeneration air between the heat exchanger and the dehumidification rotor Heating means, and the flow rate adjusting means comprises a branch duct connected between the heat exchanger and the heating means, and a damper disposed in the branch duct, and the control means comprises: dehumidifier you and adjusting the degree of opening of the damper.
JP2002012491A 2002-01-22 2002-01-22 Dehumidifier Expired - Fee Related JP3821371B2 (en)

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JP4541965B2 (en) * 2005-04-28 2010-09-08 三菱電機株式会社 Air conditioner
JP2006349304A (en) * 2005-06-20 2006-12-28 Daikin Ind Ltd Humidity conditioner
JP2007255802A (en) * 2006-03-24 2007-10-04 Jfe Engineering Kk Cryogenic gas separation system
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JP4664894B2 (en) * 2006-12-15 2011-04-06 大阪瓦斯株式会社 Desiccant air conditioner
JP4803816B2 (en) * 2006-12-19 2011-10-26 株式会社長府製作所 Desiccant air conditioner
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JP5250362B2 (en) * 2008-09-25 2013-07-31 新日本空調株式会社 Dehumidifier and operation control method thereof
JP5068293B2 (en) * 2009-09-17 2012-11-07 三菱電機株式会社 Air conditioner
JP5679264B2 (en) * 2010-06-07 2015-03-04 株式会社大気社 Heat recovery type low humidity air supply system
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