JP2000070657A - Humidity decreasing system - Google Patents

Humidity decreasing system

Info

Publication number
JP2000070657A
JP2000070657A JP10241834A JP24183498A JP2000070657A JP 2000070657 A JP2000070657 A JP 2000070657A JP 10241834 A JP10241834 A JP 10241834A JP 24183498 A JP24183498 A JP 24183498A JP 2000070657 A JP2000070657 A JP 2000070657A
Authority
JP
Japan
Prior art keywords
dew point
air
low dew
chamber
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10241834A
Other languages
Japanese (ja)
Other versions
JP3485161B2 (en
Inventor
Koichi Nishimura
浩一 西村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takasago Thermal Engineering Co Ltd
Original Assignee
Takasago Thermal Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takasago Thermal Engineering Co Ltd filed Critical Takasago Thermal Engineering Co Ltd
Priority to JP24183498A priority Critical patent/JP3485161B2/en
Publication of JP2000070657A publication Critical patent/JP2000070657A/en
Application granted granted Critical
Publication of JP3485161B2 publication Critical patent/JP3485161B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F24F2203/1004—Bearings or driving means
    • 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
    • F24F2203/1076—Rotary wheel comprising three 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

Abstract

PROBLEM TO BE SOLVED: To provide a humidity decreasing system by which air with a low dew point can be efficiently prepd. by a lower operating expenditure. SOLUTION: In this humidity decreasing system 1 provided with a low dew point room 2 kept under a low dew point atmosphere, a feeding circuits 3 for feeding air with a low dew point into the low dew point room 2 and a plurality of humidity decreasing devices 6, 7 and 8 arranged in the feeding circuit 3, an air returning circuit 4 for returning the air with a low dew point in the low dew point room 2 into the feeding circuit 3 among a plurality of the humidity decreasing devices 6, 7 and 8 is formed and a ventilation means 20 for ventilating the air with a low dew point in the low dew point room 2 is disposed in this air returning circuit 4. In the humidity decreasing system 1, positive pressure is kept in the air returning circuit 4 and in the feeding circuit 3 by ventilation by a ventilation means to prevent air with high dew point outside of the system from penetrating into the air returning circuit 4 and the feeding circuit 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は，低露点室に低露点
空気を供給する減湿システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidification system for supplying low dew point air to a low dew point chamber.

【０００２】[0002]

【従来の技術】従来，低露点空気を製造するものとして
は，例えば圧力スイング方式と呼ばれる吸着塔を用いる
方法が知られている。これは原料空気を圧縮機によって
圧縮して当該空気中のドレンを一旦除去し，その後吸着
剤を収納した吸着塔を通過させる方法である。この方法
を利用したものの一例として深冷分離プラントの前処理
装置を利用した方法によれば，水分濃度を例えば１０〜
２０ｐｐｂ（露点温度が−１０１℃〜−９８℃）にまで
下げることが可能であり，−８０℃以下のいわゆる超低
露点空気を得ることができる。また，この方法で製造さ
れた低露点空気は圧力が高いため，そのまま製造装置な
どに供給することができる。その反面，圧力スイング方
式は空気の圧縮に必要な動力が大きく，また，圧縮した
後の空気を再生に用いるため，運転費（ランニングコス
ト）が高くなってしまう。2. Description of the Related Art Conventionally, as a method for producing low dew point air, for example, a method using an adsorption tower called a pressure swing method is known. In this method, the raw air is compressed by a compressor to remove the drain in the air, and then passed through an adsorption tower containing an adsorbent. According to a method using a pretreatment device of a cryogenic separation plant as an example using this method, the water concentration is set to, for example, 10 to 10.
It can be lowered to 20 ppb (dew point temperature is -101 ° C to -98 ° C), and so-called ultra-low dew point air of -80 ° C or less can be obtained. Further, since the low dew point air produced by this method has a high pressure, it can be directly supplied to a production apparatus or the like. On the other hand, in the pressure swing method, the power required for compressing the air is large, and since the compressed air is used for regeneration, the operating cost (running cost) increases.

【０００３】これらを改善するために，低露点室に低露
点空気を供給する供給ダクトの途中に吸着ロータを用い
た乾式減湿装置を複数配置して超低露点空気を製造する
方法も提案されている。乾式減湿装置は，塩化リチウム
や塩化カルシウムなどの吸収液を含浸させたハニカム状
のロータや，シリカゲル，ゼオライトなどの吸着材で構
成したロータを備え，このロータの端面に位置する空気
の通過区域を減湿区域と再生区域とに仕切り，ロータを
回転させながら減湿区域において処理空気をロータに通
過させて乾燥空気を作り出すと共に，再生区域において
高温の再生空気をロータに通過させることによって，前
記吸着材中の水分を再生空気中に蒸発させて，連続的に
減湿処理を行うように構成されている。このような乾式
減湿装置を複数用いることにより，運転費を相当に低減
できるようになる。In order to improve these, a method has been proposed in which a plurality of dry dehumidifiers using suction rotors are arranged in the middle of a supply duct for supplying low dew point air to a low dew point chamber to produce ultra-low dew point air. ing. The dry dehumidifier has a honeycomb rotor impregnated with an absorbent such as lithium chloride or calcium chloride, or a rotor composed of an adsorbent such as silica gel or zeolite. The air passage area located at the end face of this rotor Is divided into a dehumidification zone and a regeneration zone, and the processing air is passed through the rotor in the dehumidification zone while rotating the rotor to produce dry air, and the high-temperature regeneration air is passed through the rotor in the regeneration zone. The moisture in the adsorbent is evaporated into the regeneration air to perform a continuous dehumidification process. By using a plurality of such dry dehumidifiers, the operating costs can be significantly reduced.

【０００４】[0004]

【発明が解決しようとする課題】しかし，このような複
数の乾式減湿装置を用いた場合でも，より運転費を低減
することが望ましい。そこで，更なる運転費の低減を達
成するために，低露点室において一度使用した低露点空
気を還気ダクトを通じて供給ダクト中に戻し，減湿処理
した後，低露点室に再び供給することにより，低露点空
気を再利用する試みもなされている。この方法によれ
ば，低露点空気の再利用により，運転費の低減が相当に
期待できる。However, even when such a plurality of dry dehumidifiers are used, it is desirable to further reduce the operating cost. Therefore, in order to achieve a further reduction in operating costs, the low dew point air used once in the low dew point chamber is returned to the supply duct through the return air duct, dehumidified, and then supplied again to the low dew point chamber. Attempts have been made to reuse low dew point air. According to this method, a reduction in operating costs can be expected considerably by reusing low dew point air.

【０００５】ところが，このように低露点空気を再利用
する場合，各ダクトや乾式減湿装置に備えられたファン
を通じて，機械室内雰囲気などといった高い露点の空気
が系内に侵入して，低露点室の性能を低下させる懸念が
生ずる。本発明者らが検討したところによると，この方
法によって低露点空気を再利用した場合，密閉仕様のダ
クトを用いても，還気系統で０．５％程度の外気の侵入
があり，例えば機械室内の絶対湿度が２０ｇ／ｋｇ’，
還気空気の露点温度が-５０℃（０．０２４ｇ／ｋ
ｇ’）で戻ってくるとき，系内に入ってくる空気は， 	２０×０．００５＋０．０２４×０．９９５ 	＝ ０．１２４ｇ／ｋｇ’ （露点温度-３６℃） となり，１４℃の露点温度の上昇が見られた。However, when such low dew point air is reused, air with a high dew point such as the atmosphere in a machine room enters the system through a fan provided in each duct and a dry dehumidifier, and the low dew point is reduced. A concern arises that degrades the performance of the room. According to the studies made by the present inventors, when low-dew point air is reused by this method, about 0.5% of outside air enters the return air system even if a sealed duct is used. The absolute humidity in the room is 20g / kg ',
Dew point temperature of return air is -50 ℃ (0.024g / k
g '), the air entering the system is: 	 20 × 0.005 + 0.024 × 0.995 	 = 0.124 g / kg' (dew point temperature -36 ℃ ) And the dew point temperature increased by 14 ° C.

【０００６】また従来は，低露点室から供給ダクト中に
低露点空気を戻すための還気ダクトには送風機は設けら
れておらず，低露点空気の還気は，専ら供給ダクト中に
設けられた乾式除湿装置のファンで吸引することによっ
て行われていた。このように乾式除湿装置のファンで低
露点空気の還気を行うことは，設備費や保守点数の面な
どでは合理的と考えられるが，負圧となった還気ダクト
中にダクト周囲空気が進入する心配がつきまとう。この
場合，シール剤等で還気ダクトの密閉性を向上させるこ
とは煩雑であり，また，全溶接ダクトを用いて還気ダク
ト中へのダクト周囲空気の進入を完全に防止しようとす
ると，工事費の高騰を招き，また施行精度を確保するの
に多大な労力を要した。Conventionally, no blower is provided in the return air duct for returning the low dew point air from the low dew point chamber to the supply duct, and the return air for the low dew point air is provided exclusively in the supply duct. This was done by suction with a fan of a dry dehumidifier. Returning low dew point air with the fan of the dry dehumidifier in this way is considered reasonable in terms of equipment costs and maintenance points, but the air around the duct is returned into the negative pressure return duct. I'm worried about approaching. In this case, it is troublesome to improve the airtightness of the return air duct with a sealant or the like, and if it is intended to completely prevent the air around the duct from entering the return air duct by using all welding ducts, This has led to a rise in costs, and a great deal of effort was required to ensure the accuracy of the enforcement.

【０００７】本発明の目的は，より低い運転費で低露点
空気を効率よく製造できる減湿システムを提供すること
にある。An object of the present invention is to provide a dehumidification system capable of efficiently producing low dew point air at a lower operating cost.

【０００８】[0008]

【課題を解決するための手段】以上の課題を解決するた
めに，請求項１の発明にあっては，低露点雰囲気に保た
れる低露点室と，低露点室に低露点空気を供給する供給
径路と，供給径路に配置された複数の減湿装置を備えた
減湿システムであって，前記複数の減湿装置の間におい
て供給径路に低露点室内の低露点空気を戻す還気径路を
設けると共に，この還気径路内に低露点室内の低露点空
気を送風する送風手段を設けたことを特徴としている。According to the first aspect of the present invention, there is provided a low dew point chamber maintained in a low dew point atmosphere, and low dew point air is supplied to the low dew point chamber. A dehumidification system comprising a supply path and a plurality of dehumidifiers disposed in the supply path, comprising a return air path for returning low dew point air in a low dew point chamber to the supply path between the plurality of dehumidifiers. In addition to this, a blower for blowing low dew point air in the low dew point chamber is provided in the return air path.

【０００９】この請求項１の減湿システムにおいて，供
給径路や還気径路は，例えばダクトで構成される。また
送風手段は，例えばファンやブロアで構成される。また
供給径路に配置される複数の減湿装置は，例えば供給径
路の途中に吸着ロータを配置した乾式減湿装置によって
構成される。この請求項１の減湿システムにあっては，
供給径路に配置された複数の減湿装置により，処理空気
を段階的に減湿でき，例えば−８０℃以下の超低露点の
空気を製造することも可能である。しかも，還気径路を
通じて供給径路に低露点室内の低露点空気を戻すことに
より，低露点室内の低露点空気を再利用でき，運転費の
低減がはかられる。この場合，低露点室内の低露点空気
を還気径路内に送風させる送風手段を設けているので，
この送風手段の送風によって還気径路内や供給径路内は
正圧に保たれ，例えば機械室内雰囲気などといった系外
部の高い露点の空気が還気径路内や供給径路内に侵入す
る心配がない。従って請求項１の減湿システムによれ
ば，系内への外気の侵入による湿度上昇を防止でき，よ
り低い運転費で低露点空気を効率よく製造することが可
能となる。In the dehumidifying system according to the first aspect, the supply path and the return air path are constituted by, for example, ducts. The blowing means is composed of, for example, a fan or a blower. Further, the plurality of dehumidifiers arranged in the supply path are constituted by, for example, a dry type dehumidifier in which an adsorption rotor is arranged in the middle of the supply path. In the dehumidification system of the first aspect,
The process air can be dehumidified stepwise by a plurality of dehumidifiers arranged in the supply path, and for example, it is possible to produce air having an ultra-low dew point of -80 ° C or less. Moreover, by returning the low dew point air in the low dew point room to the supply path through the return air path, the low dew point air in the low dew point room can be reused, and the operating cost can be reduced. In this case, a blowing means is provided to blow the low dew point air in the low dew point room into the return air path.
By the blowing of the blowing means, the inside of the return air path and the inside of the supply path are kept at a positive pressure, and there is no fear that air with a high dew point outside the system, such as the atmosphere in a machine room, will enter the inside of the return air path or the supply path. Therefore, according to the dehumidification system of the first aspect, it is possible to prevent an increase in humidity due to invasion of outside air into the system, and it is possible to efficiently produce low dew point air at a lower operating cost.

【００１０】この請求項１の減湿システムにおいて，請
求項２に記載したように，例えば前記送風手段を低露点
室内に配置しても良い。これにより，前記送風手段によ
って吸引される空気は，低露点室に存する空気のみとな
る。また請求項３に記載したように，前記低露点室に隣
接して還気チャンバを形成すると共に，この還気チャン
バ内に前記送風手段を配置しても良い。これにより，前
記送風手段によって吸引される空気は，低露点室から還
気チャンバ内に流入した低露点室に存する空気と同等の
低露点空気のみとなる。これら請求項２，３の減湿シス
テムによれば，また送風空気の下流側は正圧に保たれ，
外気の侵入を防ぐことができる。[0010] In the dehumidifying system according to the first aspect, as described in the second aspect, for example, the blowing means may be disposed in a low dew point chamber. Thus, the air sucked by the blowing means is only air existing in the low dew point chamber. Further, as described in claim 3, a return air chamber may be formed adjacent to the low dew point chamber, and the blower may be disposed in the return air chamber. As a result, the air sucked by the blowing means is only low dew point air equivalent to the air present in the low dew point chamber that has flowed into the return air chamber from the low dew point chamber. According to the dehumidification system of claims 2 and 3, the downstream side of the blast air is maintained at a positive pressure,
The outside air can be prevented from entering.

【００１１】また請求項５に記載したように，前記送風
手段を低露点室外に配置して，送風手段及び低露点室と
送風手段を結ぶ部分の還気径路に低露点室外の空気が侵
入しないように構成しても良い。According to a fifth aspect of the present invention, the air blowing means is arranged outside the low dew point chamber, and air outside the low dew point chamber does not enter the air blowing means and a return air path connecting the low dew point chamber and the air blowing means. It may be configured as follows.

【００１２】[0012]

【発明の実施の形態】以下，本発明の好ましい実施の形
態を図面を参照にして説明する。図１は，本発明の実施
の形態にかかる減湿システム１の説明図である。この減
湿システム１は，低露点室２に例えば−８０℃以下の超
低露点の空気を供給するように構成される。Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory diagram of a dehumidification system 1 according to an embodiment of the present invention. The dehumidification system 1 is configured to supply air having an extremely low dew point of, for example, −80 ° C. or less to the low dew point chamber 2.

【００１３】低露点室２には，低露点空気を供給するた
めの供給ダクト３（外気を取り入れ，減湿処理して低露
点室に供給する空気径路）と，低露点室２内の低露点空
気を供給ダクト３の途中に戻す還気ダクト４と，低露点
室２内から排気する排気ダクト５が接続されている。供
給ダクト３には，この実施の形態では３つの減湿装置
６，７，８が外気取り入れ口から順に直列に配置されて
いる。The low dew point chamber 2 has a supply duct 3 for supplying low dew point air (an air path that takes in outside air and performs dehumidification processing and supplies the low dew point chamber) to the low dew point chamber 2. A return air duct 4 that returns air to the middle of the supply duct 3 and an exhaust duct 5 that exhausts air from the low dew point chamber 2 are connected. In this embodiment, three dehumidifiers 6, 7, 8 are arranged in series in the supply duct 3 in order from the outside air intake.

【００１４】減湿装置６，７，８はいずれも吸着ロータ
を備えた乾式減湿装置であって，これら減湿装置６，
７，８は同様の構成を備えているので，代表して供給ダ
クト３の最も上流に配置されて外気ＯＡを最初に減湿処
理する減湿装置６について説明する。この減湿装置６は
ファン１０とクーラ１１とロータ１２を備えている。ロ
ータ１２は，例えば塩化リチウムや塩化カルシウムなど
の吸収液を含浸させたハニカム状のロータやシリカゲ
ル，ゼオライトなどの吸着材で構成した吸着ロータから
なる。ロータ１２の外周面にはベルト１３が巻回されて
おり，このベルト１３にモータ１４の回転軸１５に取り
付けたプーリ１６によって動力を伝達することにより，
ロータ１２は回転するように構成されている。ロータ１
２の端面に位置する空気の通過区域は，減湿区域１７と
再生区域１８に仕切られており，供給ダクト３を通じて
低露点室２内に供給される空気は，減湿区域１７におい
てロータ１２を通過する。また，再生区域１８において
は，ロータ１２に加熱空気が供給される。そして，ファ
ン１０によって送風される空気をクーラ１１で冷却した
後，モータ１４の稼働によってロータ１２を回転させな
がらロータ１２の減湿区域１７に空気を通過させて乾燥
空気を作り，一方で，再生区域１８において加熱空気を
ロータ１２に通過させることによって，ロータ１２に含
まれる吸着材中の水分を加熱空気中に蒸発させ，連続的
に減湿処理を行うように構成されている。なお乾式減湿
装置にあっては，再生区域１８において高温となったロ
ータ１２の端面が，ロータ１２の回転によってすぐに減
湿区域１７に移行すると，減湿区域１７においてロータ
１２を通過する空気が高温となり，露点を上げてしまう
心配がある。そこで，この実施の形態では，再生区域１
８と減湿区域１７の間にパージ区域１９を設けることに
より，再生区域１８，パージ区域１９，減湿区域１７の
順にロータ１２の端面が回転するように構成し，このパ
ージ区域１９に冷却用のパージ空気を通過させてロータ
１２の端面を予め冷却している。なお，代表して供給ダ
クト３の最も上流に配置された減湿装置６について説明
したが，その他の減湿装置７，８も減湿装置６と同様の
構成を備えている。よって，図１において減湿装置７，
８の各構成要素に減湿装置６の各構成要素と同じ符号を
付することにより，重複した説明を省略する。Each of the dehumidifiers 6, 7, and 8 is a dry dehumidifier having an adsorption rotor.
Since the devices 7 and 8 have the same configuration, a description will be given of a dehumidifying device 6 which is disposed at the most upstream position of the supply duct 3 and dehumidifies the outside air OA first. The dehumidifying device 6 includes a fan 10, a cooler 11, and a rotor 12. The rotor 12 is composed of, for example, a honeycomb-shaped rotor impregnated with an absorbing liquid such as lithium chloride or calcium chloride, or an adsorption rotor formed of an adsorbent such as silica gel or zeolite. A belt 13 is wound around the outer peripheral surface of the rotor 12. Power is transmitted to the belt 13 by a pulley 16 attached to a rotating shaft 15 of a motor 14,
The rotor 12 is configured to rotate. Rotor 1
The air passage area located at the end face of the second partition 2 is divided into a dehumidification section 17 and a regeneration section 18, and the air supplied into the low dew point chamber 2 through the supply duct 3 causes the rotor 12 in the dehumidification section 17. pass. Further, in the regeneration section 18, heated air is supplied to the rotor 12. Then, after the air blown by the fan 10 is cooled by the cooler 11, the air is passed through the dehumidifying area 17 of the rotor 12 while the rotor 12 is rotated by the operation of the motor 14, thereby producing dry air. By passing the heated air through the rotor 12 in the area 18, the moisture in the adsorbent contained in the rotor 12 is evaporated into the heated air, and the dehumidification process is continuously performed. In the case of the dry dehumidifier, when the end face of the rotor 12 which has become hot in the regeneration zone 18 immediately shifts to the dehumidification zone 17 due to the rotation of the rotor 12, the air passing through the rotor 12 in the dehumidification zone 17 is removed. May become hot and raise the dew point. Therefore, in this embodiment, the reproduction area 1
By providing a purge section 19 between the cooling section 8 and the dehumidifying section 17, the end face of the rotor 12 is configured to rotate in the order of the regeneration section 18, the purging section 19 and the dehumidifying section 17, and the purge section 19 has a cooling section. , The end face of the rotor 12 is cooled in advance. In addition, although the dehumidifying device 6 arranged most upstream of the supply duct 3 has been described, the other dehumidifying devices 7 and 8 have the same configuration as the dehumidifying device 6. Therefore, in FIG.
8 are denoted by the same reference numerals as those of the dehumidifying device 6, and redundant description will be omitted.

【００１５】そして，これら３つの減湿装置６，７，８
によって空気を段階的に減湿することによって作り出し
た，例えば−８０℃以下の超低露点の空気を，供給ダク
ト３を通じて低露点室２内に供給する構成になってい
る。The three dehumidifiers 6, 7, 8
Thus, air having an ultra-low dew point of, for example, −80 ° C. or less, which is created by gradually dehumidifying the air, is supplied into the low dew point chamber 2 through the supply duct 3.

【００１６】還気ダクト４の入側には，低露点室２内に
配置されたファン２０が取り付けられている。還気ダク
ト４の出側は，３つの減湿装置６，７，８の間において
供給ダクト３に接続され，この実施の形態では，外気を
最初に減湿処理するように供給ダクト３の最も上流に配
置された減湿装置６と次の減湿装置７の間において供給
ダクト３に還気ダクト４の出側が接続されている。そし
て，低露点室２内に配置されたファン２０の稼働によっ
て，低露点室２内の低露点空気を，減湿装置６と減湿装
置７の間において供給ダクト３に戻すようになってい
る。On the inlet side of the return air duct 4, a fan 20 disposed in the low dew point chamber 2 is mounted. The outlet side of the return air duct 4 is connected to the supply duct 3 between the three dehumidifiers 6, 7, and 8, and in this embodiment, the outermost of the supply duct 3 is dehumidified so that outside air is first dehumidified. The outlet side of the return air duct 4 is connected to the supply duct 3 between the dehumidifying device 6 arranged upstream and the next dehumidifying device 7. By operating the fan 20 arranged in the low dew point chamber 2, the low dew point air in the low dew point chamber 2 is returned to the supply duct 3 between the dehumidifier 6 and the dehumidifier 7. .

【００１７】その他，排気ダクト５の出側には，ファン
２１が取り付けられている。このファン２１の稼働によ
り，排気ダクト５を通じて低露点室２内を排気すること
も可能である。In addition, a fan 21 is mounted on the outlet side of the exhaust duct 5. By operating the fan 21, the inside of the low dew point chamber 2 can be exhausted through the exhaust duct 5.

【００１８】さて，以上のように構成された減湿システ
ム１にあっては，供給ダクト３の入側から供給ダクト３
内に取り込まれた外気を，３つの減湿装置６，７，８に
より段階的に減湿処理することにより，例えば−８０℃
以下の超低露点を供給ダクト３を通じて低露点室２内に
供給することができる。そして，低露点室２内に設けた
ファン２０を稼働させて，低露点室２内の低露点空気を
還気ダクト４を通じて供給ダクト３に戻すことにより，
低露点室２内の低露点空気を再利用でき，運転費の低減
をはかることができる。この場合，ファン２０が低露点
室２内に設置されているので，還気ダクト４には低露点
室２内の低露点空気が流入する。そしてファン２０の送
風によって還気ダクト４内や供給ダクト３内は正圧に保
たれ，例えば機械室内雰囲気などといった系外の高い露
点の空気が還気ダクト４内や供給ダクト３内に侵入する
心配がない。なお，ファン２０は低露点室２の上部空間
に吊ってもよいし，床に設置してもよい。特に，図示し
た実施の形態のように，供給ダクト３の最も上流に配置
された減湿装置６と次の減湿装置７の間において供給ダ
クト３に還気ダクト４の出側を接続すれば，各減湿装置
６，７，８の効率を向上させることに寄与する。なお図
示した実施の形態のように，供給ダクト３の最も上流に
配置された減湿装置６と次の減湿装置７の間において供
給ダクト３に還気ダクト４の出側を接続することによ
り，減湿装置６の上流側を除いて供給ダクト３内はすべ
て正圧に保たれ，系外からの高い露点の空気の侵入を供
給ダクト３のほぼ全体において防止できるようになると
考えられる。この場合，減湿装置６の上流側では供給ダ
クト３内が負圧になるが，減湿装置６の上流側ではまだ
減湿処理されていない外気のままの状態なので，減湿装
置６の上流側で供給ダクト３内に系外の空気が侵入して
もほとんど影響ない。このように，本発明の実施の形態
の減湿システム１によれば，系外からの高い露点の空気
の侵入による湿度上昇を防止でき，より低い運転費で低
露点空気を効率よく製造して低露点室２内に供給でき
る。Now, in the dehumidification system 1 configured as described above, the supply duct 3 is provided from the inlet side of the supply duct 3.
The outside air taken into the inside is gradually dehumidified by three dehumidifying devices 6, 7, and 8, for example, at -80 ° C.
The following very low dew point can be supplied into the low dew point chamber 2 through the supply duct 3. By operating the fan 20 provided in the low dew point chamber 2 to return the low dew point air in the low dew point chamber 2 to the supply duct 3 through the return air duct 4,
The low dew point air in the low dew point chamber 2 can be reused, and the operating cost can be reduced. In this case, since the fan 20 is installed in the low dew point chamber 2, the low dew point air in the low dew point chamber 2 flows into the return air duct 4. Then, the inside of the return air duct 4 and the inside of the supply duct 3 are maintained at a positive pressure by the air blown by the fan 20, and air having a high dew point outside the system such as the atmosphere in the machine room enters the inside of the return air duct 4 and the inside of the supply duct 3. Don't worry. Note that the fan 20 may be hung in the upper space of the low dew point chamber 2 or may be installed on the floor. In particular, as shown in the illustrated embodiment, if the outlet side of the return air duct 4 is connected to the supply duct 3 between the dehumidifier 6 disposed upstream of the supply duct 3 and the next dehumidifier 7. This contributes to improving the efficiency of each of the dehumidifiers 6, 7, 8. As shown in the illustrated embodiment, by connecting the outlet side of the return air duct 4 to the supply duct 3 between the dehumidifier 6 arranged at the most upstream of the supply duct 3 and the next dehumidifier 7. It is considered that the inside of the supply duct 3 is maintained at a positive pressure except for the upstream side of the dehumidifier 6, so that the intrusion of air with a high dew point from outside the system can be prevented in almost the entire supply duct 3. In this case, the inside of the supply duct 3 has a negative pressure on the upstream side of the dehumidifying device 6, but on the upstream side of the dehumidifying device 6, since the outside air which has not been subjected to the dehumidifying process is still present, the upstream side of the dehumidifying device 6. Even if air outside the system enters the supply duct 3 on the side, there is almost no effect. As described above, according to the dehumidification system 1 of the embodiment of the present invention, it is possible to prevent an increase in humidity due to intrusion of air having a high dew point from outside the system, and to efficiently produce low dew point air at a lower operating cost. It can be supplied into the low dew point chamber 2.

【００１９】以上，本発明の好ましい実施の形態の一例
を説明したが，本発明はここで説明した実施の形態に限
定されるものではない。例えば図１では，還気ダクト４
の送風を行わせるファン２０を低露点室２内に配置した
例を説明したが，低露点室２内に設置できないような場
合もある。そのような場合は，例えば図２に示したよう
に，低露点室２に隣接して還気チャンバ３０を形成し，
この還気チャンバ３０内にファン２０を配置しても良
い。この場合，還気チャンバ３０，低露点室２，及び還
気チャンバ３０と低露点室２を仕切る仕切り壁を防塵と
総仕上げのコンクリート造とし，低露点室２から還気チ
ャンバ３０への通気は，仕切り壁に設けたガラリを通じ
て行うように構成しても良い。また低露点室２に天井ボ
ードを設置して二重天井とした場合には，例えば天井裏
を低露点室２と連通する天井チャンバとして，その天井
チャンバ内を気密に形成し，かつ低露点空気を天井裏に
も給気して，低露点室２と天井裏と室外との圧力バラン
スを保つことにより，ファン２０を天井裏に設置できる
ようになる。As described above, an example of the preferred embodiment of the present invention has been described, but the present invention is not limited to the embodiment described here. For example, in FIG.
Although an example has been described in which the fan 20 for performing the ventilation is arranged in the low dew point chamber 2, there are cases where the fan 20 cannot be installed in the low dew point chamber 2. In such a case, for example, as shown in FIG. 2, a return air chamber 30 is formed adjacent to the low dew point chamber 2,
The fan 20 may be arranged in the return air chamber 30. In this case, the return air chamber 30, the low dew point chamber 2, and the partition wall separating the return air chamber 30 and the low dew point chamber 2 are made of concrete with dustproofing and finish finishing, and the ventilation from the low dew point chamber 2 to the return air chamber 30 is performed. Alternatively, a configuration may be adopted in which the operation is performed through a gallery provided on the partition wall. When a ceiling board is installed in the low dew point room 2 to form a double ceiling, for example, the inside of the ceiling chamber is airtightly formed as a ceiling chamber communicating with the low dew point room 2 and the low dew point air Is supplied to the ceiling, and the pressure balance between the low dew point chamber 2, the ceiling, and the outside is maintained, so that the fan 20 can be installed above the ceiling.

【００２０】この図２に示すように構成すれば，同様に
ファン２０の周囲空気は低露点空気であるため，より高
い露点の空気の混入を妨げる。また，ファン２０の稼働
により還気ダクト４内は正圧に保たれ，系外からの高い
露点の空気の侵入を防ぐことができる。With the configuration shown in FIG. 2, the surrounding air of the fan 20 is similarly low dew point air, so that mixing of air having a higher dew point is prevented. In addition, by operating the fan 20, the inside of the return air duct 4 is maintained at a positive pressure, and the intrusion of air with a high dew point from outside the system can be prevented.

【００２１】また図３に示すように，ファン２０を低露
点室２外に配置することも可能である。但しその場合
は，ファン２０をチャンバ３１で囲み，のチャンバ３１
と低露点室２との間の還気ダクト４の一部を全溶接仕様
の完全密閉式のダクト４’とすることによって，ファン
２０やファン２０と低露点室２との間の還気ダクト４に
おいて低露点室２外の空気が侵入しないように構成す
る。この場合，チャンバ３１は，点検口を除き鉄板全溶
接で構成するのが良い。またダクト４’とチャンバ３１
との接続部やファン２０への給電用の電線の取出口など
はシリコンシールで封止するのが良い。これにより，減
湿システム１全体の性能が確保できるようになる。なお
その他，チャンバ３１内を正圧としたり，ファン１０及
びファン２０による静圧を適正に計算することにより，
チャンバ３１に至るまでの供給ダクト３には，給気ファ
ン１０によって低露点空気が送気され，以降ファン２０
によって給気ダクト３に送気される。Further, as shown in FIG. 3, the fan 20 can be arranged outside the low dew point chamber 2. However, in that case, the fan 20 is surrounded by the chamber 31 and the
A part of the return air duct 4 between the low dew point chamber 2 and the low dew point chamber 2 is a completely sealed duct 4 ′ of a fully welded specification, so that the return air duct between the fan 20 and the fan 20 and the low dew point chamber 2 is formed. 4 so that air outside the low dew point chamber 2 does not enter. In this case, it is preferable that the chamber 31 be entirely welded on the iron plate except for the inspection port. Duct 4 'and chamber 31
It is preferable to seal the connection portion between the power supply and the outlet of the power supply wire to the fan 20 with a silicon seal. Thereby, the performance of the entire dehumidification system 1 can be secured. In addition, by setting the inside of the chamber 31 to a positive pressure and calculating the static pressure by the fans 10 and 20 appropriately,
A low dew point air is supplied to the supply duct 3 leading to the chamber 31 by the supply fan 10 and thereafter the fan 20
Thus, air is supplied to the air supply duct 3.

【００２２】その他，図示の減湿システム１では，減湿
装置６，７，８として吸着ロータを備えた乾式減湿装置
を用いる例を説明したが，冷却減湿装置，湿式減湿装
置，吸収式減湿装置など他の形式の減湿装置を用いても
良い。また，供給ダクト３に３つの減湿装置６，７，８
を配置した例を示したが，供給ダクト３に２つの減湿装
置を配置しても良いし，４つ以上の減湿装置を配置して
も良い。また，還気ダクト４の出側を接続する位置は，
最初の減湿装置６と次の減湿装置７の間に限らず，例え
ば２番目の減湿装置７と３番目の減湿装置８の間におい
て供給ダクト３に低露点室２内の空気を戻しても良く，
あるいは，最初の減湿装置６と次の減湿装置７の間及び
２番目の減湿装置７と３番目の減湿装置８の間の両方に
おいて供給ダクト３に低露点室２内の空気を戻しても良
い。In addition, in the illustrated dehumidification system 1, an example has been described in which a dry dehumidification device having an adsorption rotor is used as the dehumidification devices 6, 7, and 8, but a cooling dehumidification device, a wet dehumidification device, and an absorption device are used. Other types of dehumidifiers, such as a dehumidifier, may be used. Also, three dehumidifiers 6, 7, 8 are provided in the supply duct 3.
Although an example in which are arranged is shown, two dehumidifiers may be arranged in the supply duct 3, or four or more dehumidifiers may be arranged. Also, the position to connect the outlet side of the return air duct 4 is
The air in the low dew point chamber 2 is supplied to the supply duct 3 not only between the first dehumidifier 6 and the next dehumidifier 7 but also between the second dehumidifier 7 and the third dehumidifier 8, for example. You can put it back,
Alternatively, the air in the low dew point chamber 2 is supplied to the supply duct 3 both between the first dehumidifier 6 and the next dehumidifier 7 and between the second dehumidifier 7 and the third dehumidifier 8. You may put it back.

【００２３】[0023]

【発明の効果】本発明によれば，供給径路に配置された
複数の減湿装置により，処理空気を段階的に低露点まで
減湿でき，また還気径路を通じて供給径路に低露点室内
の低露点空気を戻すことにより，低露点室内の低露点空
気を再利用して運転費の低減をはかることができる。こ
の場合，送風手段の送風によって還気径路内や供給径路
内は正圧に保たれ，系外部の高い露点の空気が還気径路
内や供給径路内に侵入する心配がない。本発明の減湿シ
ステムによれば，同様のスペックを備えた減湿システム
に比べて低露点室内の露点温度を約１０℃以上も下げる
ことが可能となる。また本発明の減湿システムは，還気
径路内や供給径路内を正圧にして系外空気の侵入を防い
でいるので，極端に機密性の高いダクトや完全密閉式の
送風機などを使わずに済み，低コストで低露点空気を得
ることができる。According to the present invention, the process air can be dehumidified stepwise to a low dew point by a plurality of dehumidifiers arranged in the supply path, and the low dew point inside the low dew point chamber is supplied to the supply path through the return air path. By returning the dew point air, the operation cost can be reduced by reusing the low dew point air in the low dew point room. In this case, the inside of the return air path and the supply path are kept at a positive pressure by the air blown by the blowing means, and there is no fear that air having a high dew point outside the system enters the return air path or the supply path. According to the dehumidification system of the present invention, it is possible to lower the dew point temperature in the low dew point room by about 10 ° C. or more as compared with a dehumidification system having similar specifications. In addition, the dehumidification system of the present invention uses a positive pressure in the return air path and the supply path to prevent the invasion of air outside the system. Therefore, it is not necessary to use extremely confidential ducts or completely closed-type blowers. And low dew point air can be obtained at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施の形態にかかる減湿システムの構
成の概略を示す説明図である。FIG. 1 is an explanatory view schematically showing a configuration of a dehumidification system according to an embodiment of the present invention.

【図２】低露点室に隣接する還気チャンバ内にファンを
配置した実施の形態の説明図である。FIG. 2 is an explanatory diagram of an embodiment in which a fan is arranged in a return air chamber adjacent to a low dew point chamber.

【図３】ファンを低露点室外に配置した実施の形態の説
明図である。FIG. 3 is an explanatory diagram of an embodiment in which a fan is arranged outside a low dew point room.

【符号の説明】[Explanation of symbols]

１ 減湿システム ２ 低露点室 ３ 供給ダクト ４ 還気ダクト ５ 排気ダクト ６ 減湿装置 １０ ファン １１ クーラ １２ ロータ １３ ベルト １４ モータ １５ 回転軸 １６ プーリ １７ 減湿区域 １８ 再生区域 ２０ ファン ２１ ファン DESCRIPTION OF SYMBOLS 1 Dehumidification system 2 Low dew point room 3 Supply duct 4 Return air duct 5 Exhaust duct 6 Dehumidifier 10 Fan 11 Cooler 12 Rotor 13 Belt 14 Motor 15 Rotation axis 16 Pulley 17 Dehumidification area 18 Reproduction area 20 Fan 21 Fan

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【手続補正書】[Procedure amendment]

【提出日】平成１１年４月３０日（１９９９．４．３
０）[Submission date] April 30, 1999 (1999.4.3)
0)

【手続補正１】[Procedure amendment 1]

【補正対象書類名】図面[Document name to be amended] Drawing

【補正対象項目名】図１[Correction target item name] Fig. 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図１】 FIG.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 低露点雰囲気に保たれる低露点室と，低
露点室に低露点空気を供給する供給径路と，供給径路に
配置された複数の減湿装置を備えた減湿システムであっ
て，前記複数の減湿装置の間において供給径路に低露点
室内の低露点空気を戻す還気径路を設けると共に，低露
点室内の低露点空気を還気径路内に送風する送風手段を
設けたことを特徴とする，減湿システム。1. A dehumidification system comprising a low dew point chamber maintained in a low dew point atmosphere, a supply path for supplying low dew point air to the low dew point chamber, and a plurality of dehumidifiers disposed in the supply path. A return path for returning the low dew point air in the low dew point chamber to the supply path between the plurality of dehumidifiers, and a blowing means for blowing the low dew point air in the low dew point chamber to the return path. A dehumidification system characterized by the following. 【請求項２】 前記送風手段を低露点室内に配置したこ
とを特徴とする，請求項１に記載の減湿システム。2. The dehumidification system according to claim 1, wherein said blowing means is disposed in a low dew point room. 【請求項３】 前記低露点室に隣接して還気チャンバを
形成すると共に，この還気チャンバ内に前記送風手段を
配置したことを特徴とする，請求項１に記載の減湿シス
テム。3. The dehumidification system according to claim 1, wherein a return air chamber is formed adjacent to the low dew point chamber, and the blower is disposed in the return air chamber. 【請求項４】 前記送風手段を低露点室外に配置して，
送風手段及び低露点室と送風手段を結ぶ部分の還気径路
に低露点室外の空気が侵入しないように構成したことを
特徴とする，請求項１に記載の減湿システム。4. The air blowing means is arranged outside a low dew point room,
2. The dehumidification system according to claim 1, wherein air outside the low dew point chamber is prevented from entering the return air path at a portion connecting the blowing means and the low dew point chamber to the air blowing means.
JP24183498A 1998-08-27 1998-08-27 Dehumidification system Expired - Lifetime JP3485161B2 (en)

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Application Number Priority Date Filing Date Title
JP24183498A JP3485161B2 (en) 1998-08-27 1998-08-27 Dehumidification system

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JP2000070657A true JP2000070657A (en) 2000-03-07
JP3485161B2 JP3485161B2 (en) 2004-01-13

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7428821B2 (en) 2004-10-26 2008-09-30 Hitachi Plant Technologies, Ltd. Dehumidifying system
JP2010119907A (en) * 2008-11-17 2010-06-03 Shin Nippon Air Technol Co Ltd Seal structure for outer circumference of dehumidification rotor
JP2011043295A (en) * 2009-08-21 2011-03-03 Mitsubishi Electric Corp Air conditioner and air conditioning system
JP2011064439A (en) * 2009-09-18 2011-03-31 Shinko Kogyo Co Ltd Desiccant air conditioner supplying dry air at ultralow dew-point temperature
JP2011190989A (en) * 2010-03-15 2011-09-29 Shin Nippon Air Technol Co Ltd Method for controlling dew point temperature of low dew point chamber, and dehumidification system
KR101102915B1 (en) * 2009-06-26 2012-01-10 박승태 Desiccant Dehydration System and threrof Control Method
JP5624185B1 (en) * 2013-06-28 2014-11-12 ダイキン工業株式会社 Dehumidification system
WO2015084049A1 (en) * 2013-12-04 2015-06-11 김한일 Device and method for managing dew point temperature of dry room
JP2020094721A (en) * 2018-12-11 2020-06-18 東洋リビング株式会社 Storage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07754A (en) * 1993-06-16 1995-01-06 Takasago Thermal Eng Co Ltd Extremely low dew point air generator
JPH07163830A (en) * 1993-12-15 1995-06-27 Kajima Corp Dry dehumidifier and air conditioner used therewith

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07754A (en) * 1993-06-16 1995-01-06 Takasago Thermal Eng Co Ltd Extremely low dew point air generator
JPH07163830A (en) * 1993-12-15 1995-06-27 Kajima Corp Dry dehumidifier and air conditioner used therewith

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7428821B2 (en) 2004-10-26 2008-09-30 Hitachi Plant Technologies, Ltd. Dehumidifying system
JP2010119907A (en) * 2008-11-17 2010-06-03 Shin Nippon Air Technol Co Ltd Seal structure for outer circumference of dehumidification rotor
KR101102915B1 (en) * 2009-06-26 2012-01-10 박승태 Desiccant Dehydration System and threrof Control Method
JP2011043295A (en) * 2009-08-21 2011-03-03 Mitsubishi Electric Corp Air conditioner and air conditioning system
JP2011064439A (en) * 2009-09-18 2011-03-31 Shinko Kogyo Co Ltd Desiccant air conditioner supplying dry air at ultralow dew-point temperature
JP2011190989A (en) * 2010-03-15 2011-09-29 Shin Nippon Air Technol Co Ltd Method for controlling dew point temperature of low dew point chamber, and dehumidification system
JP5624185B1 (en) * 2013-06-28 2014-11-12 ダイキン工業株式会社 Dehumidification system
WO2014208023A1 (en) * 2013-06-28 2014-12-31 ダイキン工業株式会社 Dehumidification system
WO2015084049A1 (en) * 2013-12-04 2015-06-11 김한일 Device and method for managing dew point temperature of dry room
JP2020094721A (en) * 2018-12-11 2020-06-18 東洋リビング株式会社 Storage

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