JP4028988B2 - How to dry laundry - Google Patents

How to dry laundry Download PDF

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Publication number
JP4028988B2
JP4028988B2 JP2002029849A JP2002029849A JP4028988B2 JP 4028988 B2 JP4028988 B2 JP 4028988B2 JP 2002029849 A JP2002029849 A JP 2002029849A JP 2002029849 A JP2002029849 A JP 2002029849A JP 4028988 B2 JP4028988 B2 JP 4028988B2
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Prior art keywords
laundry
drying chamber
drying
heat exchanger
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JP2003225500A (en
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克弘 西蔵
守孝 大田
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Inamoto Manufacturing Co Ltd
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Inamoto Manufacturing Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、大量の洗濯物を連続的に洗濯及び乾燥する際の乾燥方法に関するもので、例えばシーツやタオルなどのリネン製品の洗濯ラインにおける乾燥方法に関し、特に第1乾燥工程と第2乾燥工程との2工程で洗濯物を乾燥する方法に関するものである。
【0002】
【従来の技術】
一般的な業務用の洗濯物乾燥機は、8kg/cm程度に加圧された蒸気を加熱媒体とする熱交換機(通常、「蒸気ヒータ」と呼ばれている)で加熱された空気を乾燥室内に導入し、この乾燥室内に設置した回転ドラムに洗濯物を投入して乾燥させるというものである。この種の乾燥機において、乾燥効率の向上と加熱空気の有効利用を図るために、乾燥室から排出される空気で次に乾燥される洗濯物を予備乾燥するという乾燥方法が提案されている。すなわち、洗濯物を収容して回転する回転ドラムを設けた本乾燥室と予備乾燥室とを隣接して設け、本乾燥室には加熱蒸気を熱源として空気を加熱する熱交換機を設けて、その通過空気を本乾燥室に導き、本乾燥室から排出された排気を予備乾燥室に導く。洗濯物は予備乾燥室から本乾燥室へと送られて乾燥される。すなわち、予備乾燥室では本乾燥室から導入される排気によって予備乾燥が行われ、本乾燥室での乾燥が終了したら、本乾燥室から乾燥済みの洗濯物を排出し、予備乾燥室の洗濯物を本乾燥室へ移送し、予備乾燥室には次の洗濯物を投入して、次の乾燥サイクルに入るという操作を順次繰り返すことにより、多量の洗濯物を連続的に乾燥する。
【0003】
このような予備乾燥と本乾燥との2工程による乾燥によれば、本乾燥が行われる前に洗濯物が予備乾燥して昇温され、かつ含水率も低下しているので、本乾燥工程での乾燥時間が短縮され、また、本乾燥室からの排出空気が再利用されるために、乾燥時間の短縮と熱エネルギーの有効利用とが図られるのである。各乾燥サイクルの終期においては、本乾燥室内の洗濯物の含水率が低下して排出空気の相対湿度も低下するので、予備乾燥室の洗濯物の乾燥も促進される。本乾燥室から排出される洗濯物の温度は、最終的に80〜90℃程度になる。
【0004】
【発明が解決しようとする課題】
本乾燥に用いた排気で次に本乾燥される洗濯物を予備乾燥する上記方法は、乾燥効率及び熱エネルギーの有効利用の点で優れていることは前述した通りであるが、実際にこのような方法で洗濯物の乾燥を行うと、次のような問題点も存在することが認められた。
【0005】
すなわち、
(1) 本乾燥室からの排気にリント(糸屑、綿埃)が含まれ、これが予備乾燥室内の洗濯物に付着する。フィルターなどでリントを除去することも考えられるが、現実には排気からリントを完全に除去することは極めて難しい。
(2) 洗濯物を乾燥する際には、洗濯物に残った臭気も水分と共に乾燥空気によって除去されるところ、この臭気が予備乾燥室内の洗濯物に移る。
(3) 色違いの洗濯物(タオルなど)を洗濯する際は、色移りを避けるために、各色毎にまとめて洗濯及び乾燥するが、前記(1)との関係で本乾燥中の洗濯物と予備乾燥中の洗濯物とを同色としなければならない。従って、洗濯物の色が変わるところで、予備乾燥室又は本乾燥室を空運転しなければならない状況が生じ、色数が多いタオルなどを洗濯するときに、洗濯効率と熱エネルギーの利用に無駄が生ずる。
(4) 本乾燥の末期に洗濯物が高温(80〜90℃)になるため、温度にデリケートな繊維では、洗濯の繰返しによって洗濯物が損傷を受ける。
【0006】
この発明は、乾燥工程を2工程で行うことの長所を生かしつつ、上記従来の方法の問題点を解決した乾燥方法を提供することを課題としている。
【0007】
【課題を解決するための手段】
上記課題を解決したこの発明の洗濯物の乾燥方法は、洗濯物を第1工程と第2工程との2工程で乾燥する洗濯物の乾燥方法において、第2工程を仕上乾燥工程とし、この仕上乾燥を、蒸気のドレンを熱源とする熱交換機で加熱された空気を用いて行うことを特徴とするものである。
【0008】
洗濯物を乾燥するのに用いる空気は、通常は加熱蒸気を熱源とする熱交換機で加熱される。従って一般的には、この発明の洗濯物の乾燥方法は、蒸気を熱源として通過空気を加熱する1次熱交換機を通過した加熱空気で洗濯物を1次乾燥し、蒸気のドレンを熱源として通過空気を加熱する2次熱交換機を通過した加熱空気で前記1次乾燥した洗濯物を仕上乾燥するというものである。
【0009】
前記の乾燥方法においては、1次乾燥と仕上乾燥とを同時並行的に行い、1次乾燥用の空気を加熱する1次熱交換機の蒸気のドレンを仕上乾燥用の空気を加熱する2次熱交換機に供給する。
【0010】
この発明の方法を実施するのに用いる洗濯物の乾燥機は、熱交換機16と、この熱交換機への加熱媒体供給路に設けられたドレントラップ21と、この熱交換機の被加熱空気の流路に連通している乾燥室3と、この乾燥室内に設置された回転ドラム7と、この乾燥室及び前記熱交換機に空気を流通させるファン17と、前記回転ドラムに洗濯物を投入する開閉扉5とを備えた、洗濯物の仕上乾燥機である。
【0011】
第1工程の乾燥と第2工程の仕上乾燥とを連続的に行う方法で用いいる乾燥機は、開閉扉5で区画された1次乾燥室2及び仕上乾燥室3と、この開閉扉に小口端を臨ませて1次乾燥室内に配置された回転ドラム6と、この開閉扉に小口端を臨ませて仕上乾燥室内に配置された回転ドラム7と、被加熱空気の通路を1次乾燥室2に連通した1次熱交換機14と、被加熱空気の通路を仕上乾燥室3に連通した2次熱交換機16と、1次熱交換機の加熱媒体通路の出口を2次熱交換機の加熱媒体通路の入口に連結する連結通路22と、この連結通路に設けられたドレントラップ21と、洗濯物を1次乾燥室の回転ドラム6から仕上乾燥室の回転ドラム7へ移送する移送装置13とを備えている。
【0012】
洗濯工場においては、洗濯液の加熱、乾燥機の熱源、アイロナー(皺延ばし機)の熱源などとして、大量の加熱蒸気を用いている。この加熱蒸気は、通常8kg/cm前後に加圧されており、蒸気温度は180℃弱である。洗濯工場では、このような加熱蒸気が有する大きな蒸発潜熱を熱源として利用しており、乾燥用の加熱空気を生成する熱交換機も同様である。熱交換機で熱交換が行われると、蒸気は凝集してドレンとなる。従来このドレンは、蒸気ボイラへ戻したり、温水を得るための熱源として一部利用されることもあるが、排出量が多いこともあって大部分が排気されているのが実情である。しかし、このドレンは、例えば乾燥機の熱交換機においては、その排出位置で約4kg/cmの圧力があり、大気放出したときには、その一部が再蒸発する程度の熱エネルギーを保有している。
【0013】
この発明は、このことに着目して、従来の加熱空気の熱エネルギーの再利用に代えて、加熱蒸気のドレンの熱エネルギーを再利用することで、空気の再利用によるリントや臭気の移転の問題を解消しつつ、乾燥効率の向上と熱エネルギーの有効利用とを図ったものである。この発明の乾燥方法によれば、1次乾燥工程及び仕上乾燥工程における加熱空気は、他の洗濯物の乾燥に用いないため、上記(1)(2)及び(3)の問題は生じない。
【0014】
更にこの発明では、乾燥前の洗濯物の温度を約30℃とした場合でも、1次乾燥工程の終了時における洗濯物の温度は、約70℃程度であり、その後の仕上乾燥工程では、ドレンを熱源とする熱交換機からの比較的低温の加熱空気で乾燥が行われるため、洗濯物は70℃から徐々に温度低下しながら乾燥が終了する。従って、従来方法での洗濯物の最高温度が80〜90℃であることに比べて、乾燥温度が低く抑えられるため、温度にデリケートな繊維であっても、洗濯物を損傷する危険が小さく、洗濯物の寿命が延びるという長所がある。更に乾燥温度が低く抑えられることで、洗濯物が柔らかく仕上がり、乾燥済み洗濯物の風合いが良いという長所もある。
【0015】
【発明の実施の形態】
以下、図面を参照して、この発明の実施形態を説明する。図に示す乾燥機は、筐体1内に1次乾燥室2と仕上乾燥室3とが区画形成されている。両乾燥室2、3の間には、U字形の開口を備えた隔壁4が設けられており、前記開口にはU字形の引上げ開閉式のシャッタ5が設けられている。両乾燥室2、3には、それぞれの小口端を前記シャッタにに隣接された状態で回転ドラム6、7が配置されている。各回転ドラム6、7は、パンチングメタルや金網などの通気性の周壁を備えており、それぞれがその両端に設けたリム部を各2個、計4個のローラで回転自在に支持され、これらのローラのいくつかを回転駆動することにより、それぞれの乾燥室内で回転する。筐体1には、各回転ドラム6、7の外側を向いた小口端に隣接して開閉自在な洗濯物投入口8と排出口9とが設けられている。筐体1は、その排出側端部10の下端を支持軸11で揺動自在に支持され、投入側端部12の下端を昇降シリンダ13で支持されている。昇降シリンダ13を上昇させることにより、筐体1は排出側が低くなる方向に傾斜する。
【0016】
筐体1の上面の1次乾燥室2の上部には、加熱蒸気を熱源として通過空気を加熱する1次熱交換機14(以下、「メインヒータ」という)と、1次乾燥室2内にメインヒータの通過空気を循環させる排気ファン15とが設けられている。また、筐体1の上面の仕上乾燥室3の上部には、蒸気ドレンを熱源として通過空気を加熱する2次熱交換機16(以下、「ドレンヒータ」という)と、このドレンヒータの通過空気を仕上乾燥室3内に循環させる排気ファン17とが設置されている。メインヒータ14の加熱媒体通路の入口には、加熱蒸気源に連結した蒸気供給管18が接続されている。ドレンヒータ16の加熱媒体通路の出口は、動作を安定化させるための背圧弁19を備えたドレン排出管20に連結されている。メインヒータ14の加熱媒体通路の出口とドレンヒータ16の加熱媒体通路の入口とは、中間にドレントラップ21を介装した連結管22で連結されている。
【0017】
次に上記装置による洗濯物の乾燥手順を説明する。遠心脱水やプレス脱水機により脱水された洗濯物は、塊状になって乾燥機へと搬送されて来る。搬送された洗濯物は、投入ドア23を開いて1次乾燥室の回転ドラム6内へ投入する。メインヒータ14に加熱蒸気を供給した状態で排気ファン15が回転し、回転ドラム6が回転して投入された洗濯物を乾燥させる。図示しない制御器に設定された時間が経過すると、昇降シリンダ13が伸長し、排出ドア24が開く。次に排出ドア24が閉じてシャッタ5が上昇して、隔壁4の開口を通じて回転ドラム6、7の各小口端が連通する。シャッタ5が上昇すると、回転ドラム6内の洗濯物は、旋回しながら仕上乾燥室の回転ドラム7へと移送される。次にシャッタ5が閉じ、回転ドラム6が停止し、投入ドア23が開いて、次の洗濯物が1次乾燥室の回転ドラム6に投入される。投入ドア23が閉じ、ファン15、17の運転と回転ドラム6、7の回転が開始される。1次乾燥室2には、メインヒータ14を通過した加熱空気が循環して洗濯物を乾燥する。ドレンヒータ16には、メインヒータ14を通過した蒸気のドレンがドレントラップ21を通って供給され、その一部はドレンヒータの加熱媒体通路で再蒸発し、ドレンヒータ16を通過する空気を加熱する。ドレンヒータ16で加熱された空気は、排気ファン17によって仕上乾燥室3内に導入され、回転ドラム7内の洗濯物を仕上乾燥する。1次乾燥室2と仕上乾燥室3とに洗濯物が存在する定常状態では、2つの洗濯物に対する1次乾燥と仕上乾燥とが並行して行われる。
【0018】
制御器に設定した時間が経過すると、ファン15、17が停止し、昇降シリンダ13が上昇して筐体1を傾斜させ、排出ドア24が開く。仕上乾燥室3の回転ドラム7内の洗濯物は、旋回しながら搬送コンベア25上へと排出される。次に排出ドア24を閉じ、シャッタ5を上昇すると、1次乾燥室内の回転ドラムから仕上乾燥室内の回転ドラムへと1次乾燥された洗濯物が移送される。次に回転ドラム6を停止し、シャッタ5を閉じ、投入ドア23を開いて次の洗濯物を投入した後、投入ドア23を閉じ、昇降シリンダ13を下降して回転ドラム6の回転とファン15、17の運転を開始する。以上の動作を繰り返すことにより、一塊状となった洗濯物の乾燥を順次行う。
【0019】
以上の実施例では、ドレンヒータの熱源として1次乾燥室に設置したメインヒータの蒸気ドレンのみを用いているが、他の装置のドレン、例えばアイロナーから排出されるドレンをドレントラップを介してドレンヒータ16に導くこともできる。複数の装置からドレンを供給することも可能である。また、1次乾燥室2と仕上乾燥室3とを別々の筐体に設置し、その間をベルトコンベアなどで洗濯物を移送することも可能である。更に1工程で洗濯物の乾燥を行っている既存の乾燥機を1次乾燥機として使用し、ドレンヒータを設けた仕上乾燥機を新たに設置して、両乾燥機の間での洗濯物の移送装置を設けることにより、この発明の方法による乾燥方法を実施することも可能である。
【0020】
また上記実施例では、1次乾燥室の回転ドラムから仕上乾燥室の回転ドラムへの移送装置として回転ドラムを傾斜させて洗濯物を滑り落とす方法を採用しているが、2つの回転ドラム間で洗濯物を移送する他の方法として、例えば特許第3044218号公報に示されているように、空気流で移送する方法や回転ドラム内に設置したコンベアで移送する方法などが知られており、これらの移送方法をこの発明の方法ないし装置に用いることももちろん可能である。更に洗濯物を移送する代わりに、スチームヒータとドレンヒータを同じ構造にして加熱蒸気を両ヒータに交互に供給する切り替え装置を設け、加熱蒸気の切り替えに応じて両ヒータ間の蒸気ドレンの流れの方向を変換するようにして、2つの乾燥室を1次乾燥室と仕上乾燥室とに交互に機能させることも可能である。
【図面の簡単な説明】
【図1】 この発明の方法を実施する乾燥機の模式的断面図
【符号の説明】
2 1次乾燥室
3 仕上乾燥室
5 シャッタ
6 回転ドラム
7 回転ドラム
13 昇降シリンダ
14 1次熱交換機
16 ドレンヒータ
21 ドレントラップ
[0001]
BACKGROUND OF THE INVENTION
SUMMARY OF THE INVENTION The present invention relates to a dry how when continuously washing and drying a large amount of laundry, for example, related to dry how the laundry line linen products such as sheets and towels, and in particular the first drying step those related to how to dry the laundry in two steps with the second drying step.
[0002]
[Prior art]
A typical laundry dryer for business use dries air heated by a heat exchanger (usually called “steam heater”) using steam pressurized to about 8 kg / cm 2 as a heating medium. It is introduced into the room, and the laundry is put into a rotating drum installed in the drying room and dried. In this type of dryer, in order to better utilize the heated air and improve the drying efficiency, drying how that the laundry is subsequently dried in air discharged from the drying chamber predrying has been proposed . That is, a main drying chamber provided with a rotating drum that accommodates laundry and a preliminary drying chamber are provided adjacent to each other. The main drying chamber is provided with a heat exchanger that heats air using heating steam as a heat source. The passing air is guided to the main drying chamber, and the exhaust discharged from the main drying chamber is guided to the preliminary drying chamber. The laundry is sent from the preliminary drying room to the main drying room and dried. That is, in the preliminary drying room, preliminary drying is performed by exhaust introduced from the main drying room, and after drying in the main drying room is finished, the dried laundry is discharged from the main drying room, and the laundry in the preliminary drying room is discharged. Is transferred to the main drying room, the next laundry is put into the preliminary drying room, and the operation of entering the next drying cycle is sequentially repeated, whereby a large amount of laundry is continuously dried.
[0003]
According to such drying in two steps of pre-drying and main drying, the laundry is pre-dried and heated before the main drying is performed, and the water content is also reduced. The drying time is shortened, and the exhaust air from the main drying chamber is reused, so that the drying time is shortened and the thermal energy is effectively used. At the end of each drying cycle, the moisture content of the laundry in the main drying chamber decreases and the relative humidity of the discharged air also decreases, so that the drying of the laundry in the preliminary drying chamber is also promoted. The temperature of the laundry discharged from the main drying room is finally about 80 to 90 ° C.
[0004]
[Problems to be solved by the invention]
As described above, the above-mentioned method of pre-drying the laundry to be subsequently dried with the exhaust used for the main drying is excellent in terms of drying efficiency and effective use of heat energy. When the drying of laundry in the name way method, it has been found that even the following problems exist.
[0005]
That is,
(1) The exhaust from the main drying chamber contains lint (thread waste, cotton dust), which adheres to the laundry in the preliminary drying chamber. Although it is conceivable to remove lint with a filter or the like, in reality, it is extremely difficult to completely remove lint from exhaust gas.
(2) When the laundry is dried, the odor remaining in the laundry is removed together with moisture by the dry air, and this odor is transferred to the laundry in the preliminary drying room.
(3) When washing the different colors of the laundry (such as towels) in order to avoid color transfer, although washing and drying are summarized for each color, the laundry in the drying in relation to the (1) And the laundry being pre-dried must have the same color. Therefore, there is a situation where the preliminary drying room or the main drying room has to be idled when the color of the laundry changes, and when washing towels with a large number of colors, washing efficiency and use of heat energy are wasted. Arise.
(4) Since the laundry becomes a high temperature (80 to 90 ° C.) at the end of the main drying, the laundry is damaged by repeated washing in the case of the fiber sensitive to the temperature.
[0006]
The present invention, while utilizing the advantages of carrying out the drying step in two steps, has an object to provide a drying how that solves the problems of the method towards the conventional.
[0007]
[Means for Solving the Problems]
The laundry drying method of the present invention that has solved the above problems is a laundry drying method for drying laundry in two steps, the first step and the second step, wherein the second step is a finish drying step. The drying is performed using air heated by a heat exchanger using steam drain as a heat source.
[0008]
The air used to dry the laundry is usually heated by a heat exchanger using heated steam as a heat source. Thus in general, the drying process of the laundry of the present invention is to laundry primary drying heating air passing through the primary heat exchanger for heating the air passing through the air steam as a heat source, a vapor drain as the heat source The primary dried laundry is finish dried with heated air that has passed through a secondary heat exchanger that heats the passing air.
[0009]
In the above drying method, primary drying and finish drying are performed simultaneously in parallel, and the primary heat exchanger steam drain that heats the primary drying air is used as the secondary heat to heat the finish drying air. We supply to the exchange.
[0010]
The laundry dryer used for carrying out the method of the present invention includes a heat exchanger 16, a drain trap 21 provided in a heating medium supply path to the heat exchanger, and a flow path of heated air of the heat exchanger. A drying chamber 3 that communicates with the drying chamber 7, a rotating drum 7 installed in the drying chamber, a fan 17 that circulates air to the drying chamber and the heat exchanger, and an open / close door 5 that feeds laundry into the rotating drum. A finishing dryer for laundry.
[0011]
The dryer used in the method of continuously performing the drying in the first step and the finishing drying in the second step includes a primary drying chamber 2 and a finishing drying chamber 3 partitioned by an opening / closing door 5, and a small opening in the opening / closing door. A rotating drum 6 disposed in the primary drying chamber with the end facing, a rotating drum 7 disposed in the finishing drying chamber with the small end facing the open / close door, and the passage of the heated air through the primary drying chamber 2, a primary heat exchanger 14 that communicates with the finish drying chamber 3, and a heating medium passage of the secondary heat exchanger that connects the outlet of the heating medium passage of the primary heat exchanger. And a drain trap 21 provided in the connection passage, and a transfer device 13 for transferring the laundry from the rotary drum 6 of the primary drying chamber to the rotary drum 7 of the finishing drying chamber. ing.
[0012]
In a laundry factory, a large amount of heated steam is used as a heat source for a washing liquid, a heat source for a dryer, a heat source for an ironer (a spreader), and the like. This heated steam is usually pressurized to around 8 kg / cm 2 and the steam temperature is slightly below 180 ° C. Laundry factories use the large latent heat of vaporization of such heated steam as a heat source, and the same applies to heat exchangers that generate heated air for drying. When heat exchange is performed by the heat exchanger, the steam aggregates and becomes drainage. Conventionally, this drain is partly used as a heat source for returning to a steam boiler or obtaining hot water, but the fact is that most of the drain is exhausted due to the large amount of discharge. However, for example, in a heat exchanger of a dryer, this drain has a pressure of about 4 kg / cm 2 at the discharge position, and when released into the atmosphere, the drain has enough heat energy to re-evaporate. .
[0013]
This invention pays attention to this, and instead of reusing the heat energy of the conventional heated air, the heat energy of the drain of the heating steam is reused, thereby transferring lint and odors by reusing the air. It aims to improve drying efficiency and effectively use heat energy while solving problems. According to the drying how of the present invention, since the heated air in the first drying step and the finishing drying step is not used for drying other laundry, the (1), a problem occurs in (2) and (3) Absent.
[0014]
Furthermore, in this invention, even when the temperature of the laundry before drying is about 30 ° C., the temperature of the laundry at the end of the primary drying step is about 70 ° C., and in the subsequent drying step, Since drying is performed with relatively low-temperature heated air from a heat exchanger that uses as a heat source, drying of the laundry is completed while gradually decreasing the temperature from 70 ° C. Therefore, since the drying temperature can be suppressed lower than the maximum temperature of the laundry in the conventional method is 80 to 90 ° C., the risk of damaging the laundry is small even if the temperature is delicate. There is an advantage that the life of the laundry is extended. Furthermore, since the drying temperature is kept low, the laundry is finished soft, and the dry laundry has a good texture.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the dryer shown in the figure, a primary drying chamber 2 and a finishing drying chamber 3 are partitioned in a housing 1. A partition 4 having a U-shaped opening is provided between the drying chambers 2 and 3, and a U-shaped pulling open / close shutter 5 is provided in the opening. Rotating drums 6 and 7 are arranged in both drying chambers 2 and 3 with their respective small ends adjacent to the shutter. Each of the rotating drums 6 and 7 is provided with a breathable peripheral wall such as punching metal or a metal mesh, and each of the rotating drums 6 and 7 is supported by a total of four rollers, each having two rim portions provided at both ends thereof. By rotating and driving some of the rollers, the rollers rotate in the respective drying chambers. The housing 1 is provided with a laundry input port 8 and a discharge port 9 that are openable and closable adjacent to the small ends facing the outside of the rotary drums 6 and 7. The casing 1 has a lower end of the discharge side end portion 10 supported by a support shaft 11 so as to be swingable, and a lower end of the input side end portion 12 supported by an elevating cylinder 13. By raising the elevating cylinder 13, the housing 1 is inclined in a direction in which the discharge side is lowered.
[0016]
A primary heat exchanger 14 (hereinafter referred to as a “main heater”) that heats the passing air by using heated steam as a heat source is disposed above the primary drying chamber 2 on the upper surface of the housing 1. An exhaust fan 15 that circulates the air passing through the heater is provided. Further, in the upper part of the finish drying chamber 3 on the upper surface of the housing 1, a secondary heat exchanger 16 (hereinafter referred to as “drain heater”) that heats the passing air using steam drain as a heat source, and the passing air of the drain heater are finished and dried. An exhaust fan 17 that is circulated in the chamber 3 is installed. A steam supply pipe 18 connected to a heating steam source is connected to the inlet of the heating medium passage of the main heater 14. The outlet of the heating medium passage of the drain heater 16 is connected to a drain discharge pipe 20 provided with a back pressure valve 19 for stabilizing the operation. The outlet of the heating medium passage of the main heater 14 and the inlet of the heating medium passage of the drain heater 16 are connected by a connecting pipe 22 having a drain trap 21 interposed therebetween.
[0017]
Next, a procedure for drying laundry by the above apparatus will be described. Laundry dehydrated by centrifugal dehydration or press dehydrator is lumped and conveyed to the dryer. The conveyed laundry is opened into the rotary drum 6 of the primary drying chamber by opening the loading door 23. The exhaust fan 15 rotates with the heating steam supplied to the main heater 14, and the rotating drum 6 rotates to dry the thrown-in laundry. When the time set in the controller (not shown) elapses, the elevating cylinder 13 extends and the discharge door 24 opens. Next, the discharge door 24 is closed and the shutter 5 is raised, and the respective small ends of the rotary drums 6 and 7 are communicated with each other through the opening of the partition wall 4. When the shutter 5 is raised, the laundry in the rotary drum 6 is transferred to the rotary drum 7 in the finishing drying chamber while turning. Next, the shutter 5 is closed, the rotary drum 6 is stopped, the input door 23 is opened, and the next laundry is input to the rotary drum 6 in the primary drying chamber. The closing door 23 is closed, and the operation of the fans 15 and 17 and the rotation of the rotary drums 6 and 7 are started. Heated air that has passed through the main heater 14 circulates in the primary drying chamber 2 to dry the laundry. The drain heater 16 is supplied with steam drain that has passed through the main heater 14 through a drain trap 21, part of which is re-evaporated in the heating medium passage of the drain heater and heats the air passing through the drain heater 16. The air heated by the drain heater 16 is introduced into the finish drying chamber 3 by the exhaust fan 17 to finish and dry the laundry in the rotary drum 7. In a steady state where laundry is present in the primary drying chamber 2 and the finishing drying chamber 3, primary drying and finishing drying for two laundry items are performed in parallel.
[0018]
When the time set in the controller elapses, the fans 15 and 17 are stopped, the elevating cylinder 13 is raised, the casing 1 is inclined, and the discharge door 24 is opened. The laundry in the rotary drum 7 of the finishing drying chamber 3 is discharged onto the conveyor 25 while turning. Next, when the discharge door 24 is closed and the shutter 5 is raised, the laundry that has been primarily dried is transferred from the rotating drum in the primary drying chamber to the rotating drum in the finishing drying chamber. Next, the rotating drum 6 is stopped, the shutter 5 is closed, the closing door 23 is opened and the next laundry is loaded, and then the closing door 23 is closed and the elevating cylinder 13 is lowered to rotate the rotating drum 6 and the fan 15. , 17 starts operation. By repeating the above operation, the lump of laundry is sequentially dried.
[0019]
In the above embodiment, only the steam drain of the main heater installed in the primary drying chamber is used as the heat source of the drain heater. However, the drain of another apparatus, for example, the drain discharged from the ironer is drained through the drain trap 16. Can also lead to. It is also possible to supply drain from a plurality of devices. It is also possible to install the primary drying chamber 2 and the finishing drying chamber 3 in separate housings and transfer the laundry between them by a belt conveyor or the like. In addition, the existing dryer that dries the laundry in one step is used as the primary dryer, and a finish dryer equipped with a drain heater is newly installed to transfer the laundry between both dryers. By providing the apparatus, it is possible to carry out the drying method according to the method of the present invention.
[0020]
Moreover, in the said Example, the method of inclining a rotating drum as a transfer apparatus from the rotating drum of a primary drying chamber to the rotating drum of a finishing drying chamber is employ | adopted, but between two rotating drums is adopted. As other methods for transferring laundry, for example, as disclosed in Japanese Patent No. 3434218, a method of transferring by air flow, a method of transferring by a conveyor installed in a rotating drum, and the like are known. Of course, it is also possible to use this transfer method in the method or apparatus of the present invention. Furthermore, instead of transferring the laundry, the steam heater and drain heater have the same structure, and a switching device that alternately supplies heating steam to both heaters is provided, and the direction of the steam drain flow between both heaters according to the switching of the heating steam It is also possible to cause the two drying chambers to function alternately as a primary drying chamber and a finishing drying chamber.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a dryer for carrying out the method of the present invention.
2 Primary drying chamber 3 Finish drying chamber 5 Shutter 6 Rotating drum 7 Rotating drum
13 Lifting cylinder
14 Primary heat exchanger
16 Drain heater
21 Drain trap

Claims (2)

熱交換機 (16) と、この熱交換機の被加熱空気の流路に連通している乾燥室 (3) と、この乾燥室内に設置された回転ドラム (7) と、この乾燥室及び前記熱交換機に空気を流通させるファン (17) と、前記回転ドラムに洗濯物を投入する開閉扉 (5) とを備えた洗濯物乾燥機の前記熱交換機の加熱媒体供給路にドレントラップ (21) を設け、当該熱交換機に蒸気のドレンを供給し、予め1次乾燥された洗濯物を前記回転ドラムに投入することにより、蒸気のドレンのみで加熱された加熱空気で当該洗濯物を仕上乾燥することを特徴とする、洗濯物の乾燥方法。 A heat exchanger (16) , a drying chamber (3) communicating with a flow path of heated air of the heat exchanger, a rotating drum (7) installed in the drying chamber, the drying chamber and the heat exchanger A drain trap (21) is provided in the heating medium supply path of the heat exchanger of the laundry dryer provided with a fan (17) for circulating air to the rotary drum and an open / close door (5) for putting the laundry into the rotating drum. to supply steam drain in the heat exchanger, by injecting the pre-primary-dried laundry to the rotary drum, the drying finish the laundry in a heated air heated only by the steam of the drain A method for drying laundry. 開閉扉 (5) で区画された1次乾燥室 (2) 及び仕上乾燥室 (3) と、この開閉扉に小口端を臨ませて1次乾燥室内に配置された回転ドラム (6) と、この開閉扉に小口端を臨ませて仕上乾燥室内に配置された回転ドラム (7) と、被加熱空気の通路を1次乾燥室 (2) に連通した1次熱交換機 (14) と、被加熱空気の通路を仕上乾燥室 (3) に連通した2次熱交換機 (16) と、1次熱交換機の加熱媒体通路の出口を2次熱交換機の加熱媒体通路の入口に連結する連結通路 (22) と、洗濯物を1次乾燥室の回転ドラム (6) から仕上乾燥室の回転ドラム (7) へ移送する移送装置 (13) とを備えている洗濯物の乾燥機の前記連結通路にドレントラップ (21) を設け、前記1次熱交換機に加熱蒸気を供給すると共に前記2次熱交換機に1次熱交換機を通過した蒸気のドレンを供給し、洗濯物を前記1次乾燥室で1次乾燥したあと2次乾燥室に移送し、当該2次乾燥室において蒸気のドレンのみで加熱された加熱空気で当該移送された洗濯物を仕上乾燥することを特徴とする、洗濯物の乾燥方法。 A primary drying chamber (2) and a finishing drying chamber (3) partitioned by an opening / closing door (5) , and a rotating drum (6) disposed in the primary drying chamber with a small end facing the opening / closing door ; a rotary drum disposed in the finishing drying chamber to face the small end to the door (7), a primary passage of the heated air drying chamber (2) communicating with the primary heat exchanger (14), the A secondary heat exchanger (16) communicating the heated air passage to the finishing drying chamber (3) , and a connecting passage connecting the outlet of the heating medium passage of the primary heat exchanger to the inlet of the heating medium passage of the secondary heat exchanger ( and 22), the laundry in the connection path of the dryer of the transfer device (13) and the laundry and a transferring to the rotary drum of the drying chamber finish from the rotating drum of the primary drying chamber (6) (7) the drain trap (21) is provided, to supply steam drain that has passed through the primary heat exchanger to the secondary heat exchanger supplies heat steam to the primary heat exchanger, the laundry the primary Transferred to the secondary drying chamber After primary drying at燥室, characterized in that drying finishing the transfer is laundry in a heated air in the second drying chamber is heated only by the drain of the steam, washing How to dry things.
JP2002029849A 2002-02-06 2002-02-06 How to dry laundry Expired - Lifetime JP4028988B2 (en)

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US8015726B2 (en) * 2005-06-23 2011-09-13 Whirlpool Corporation Automatic clothes dryer
KR101082925B1 (en) 2009-03-02 2011-11-15 양영근 Portable Electric Hot Water Heater Clothes Dryer
JP2016112287A (en) * 2014-12-17 2016-06-23 株式会社アサヒ製作所 Dryer
DE102017002174A1 (en) * 2017-03-09 2018-09-13 Lapauw (Thailand) Ltd. Clothes dryer for drying laundry

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