JP4797291B2

JP4797291B2 - Beverage extractor

Info

Publication number: JP4797291B2
Application number: JP2001213930A
Authority: JP
Inventors: 年弘野村; 克己水谷
Original assignee: Fuji Electric Retail Systems Co Ltd
Current assignee: Fuji Electric Retail Systems Co Ltd
Priority date: 2001-07-13
Filing date: 2001-07-13
Publication date: 2011-10-19
Anticipated expiration: 2021-07-13
Also published as: JP2003024703A

Description

【０００１】
【発明の属する技術分野】
この発明は、コーヒー粉や茶葉などの飲料原料に湯を通して飲料を加圧抽出する装置に関し、特にエスプレッソのように数気圧以上の高圧で飲料を抽出するのに適した装置に関する。
【０００２】
【従来の技術】
この種の飲料抽出装置として、予め湯を沸かして貯蔵しておき、この湯を飲料抽出時に空気圧あるいはピストンで加圧して飲料原料に通し、飲料を抽出するものが知られており、コーヒー自動販売機などに用いられている。
【０００３】
【発明が解決しようとする課題】
ところが、このような従来の飲料抽出装置は、湯が貯湯タンクから配管系統や加圧室などを通して飲料原料に到達するまでに冷めることが避けられず、風味のよい熱い飲料を抽出することが困難であった。また、空気圧やピストンによる湯の加圧では、高い抽出圧力を得るには無理があり、従って湯を通す原料粉の粒度をあまり細かくできないため、微細な粉末原料を用いたエスプレッソなどの飲料の抽出には必ずしも適していなかった。
【０００４】
そこで、この発明の課題は、高温高圧の湯を用いて高品質の飲料を容易に抽出できるようにすることにある。
【０００５】
【課題を解決するための手段】
金属管からなる加熱管に水を通しながら通電し、この通電により発熱した加熱管で加熱して沸かした湯を飲料抽出器に送り込んで飲料を抽出するものである。すなわち、この発明の飲料抽出装置は、一端に水が流入する水入口を有し、他端に湯又は水蒸気が流出する湯出口を有する金属管からなる加熱管と、前記水入口に接続された水ポンプと、前記加熱管の湯出口に接続され、収容した飲料原料に湯を接触させてフィルタを通して飲料を抽出する飲料抽出器と、前記加熱管に通電する加熱電源と、この加熱電源から供給する電力及び前記水ポンプから供給する水の流量を制御する手段とを備え、前記水ポンプにより給水しながら前記加熱管に通電し、この通電による前記加熱管の発熱により前記水を加熱して湯を沸かし、この湯を前記水ポンプの吐出圧で前記抽出器に押し込み、前記飲料原料から定量の飲料を抽出して前記抽出口から送り出した後、前記給水及び通電を停止するものである。
【０００６】
この飲料抽出装置によれば、加熱管で沸かした湯を直に飲料抽出器に供給するので、湯が冷めることがない。また、加熱管は内径数ｍｍの金属管で構成できるので高圧に耐え、例えば８気圧（ゲージ圧、以下、同じ。）以上の高圧を飲料抽出器に容易に加えることができる。更に、水ポンプの流量と加熱管に供給する電力を適切に制御することにより、湯温を自在にコントロールすることができ、必要により１００℃以上の過熱蒸気を飲料抽出器に送り込むこともできる。
【０００７】
この飲料抽出装置は水ポンプの吐出圧で飲料抽出圧力を発生させるものであるが、飲料抽出圧力は蒸気圧から得ることも可能である。そのようなこの発明の飲料抽出装置は、一端に水が流入する水入口を有し、他端に湯又は水蒸気が流出する湯出口を有する金属管からなり、前記水入口から前記湯出口に向って上向きに設置された加熱管と、一端に湯又は水蒸気が流入する湯入口を有し、他端に湯又は水蒸気が流出する湯出口を有する管からなり、前記湯入口から前記湯出口に向って下向きに設置されるとともに、前記湯入口が前記加熱管の湯出口に接続された送湯管と、前記加熱管の水入口に逆止弁を介して接続された水ポンプと、前記加熱管の湯出口に接続され、装填された飲料原料に湯を接触させてフィルタを通して飲料を抽出する飲料抽出器と、前記加熱管に通電する加熱電源と、この加熱電源から供給する電力及び前記水ポンプから供給する水の流量を制御する手段とを備え、前記水ポンプにより水を供給しながら前記加熱管に通電し、この通電による前記加熱管の発熱により前記水を加熱して湯を沸かし、この湯を前記送湯管に一時蓄えるとともに、前記水ポンプからの給水が定量に達したら給水を停止して前記加熱管内の水を沸騰させ、生じた蒸気圧で前記送湯管内の湯を前記抽出器に押し込み、前記飲料原料から定量の飲料を抽出して前記抽出口から送り出した後、前記通電を停止するものとする（請求項１）。
【０００８】
この請求項１の飲料抽出装置によれば、金属管内の水を沸騰させた水蒸気で湯を飲料抽出器に押し込むので、水ポンプとして高価な高圧ポンプを用いる必要がない。水ポンプ側への水の逆流は、逆止弁により阻止される。
【０００９】
請求項１において、前記加熱管の湯出口には、湯溜りを設けるのがよい（請求項２）。給水の沸騰による水蒸気圧の発生において、加熱管に水があれば水蒸気圧と水蒸気温度との間には正確な相関があり、例えば、水蒸気圧０気圧（大気圧）で水蒸気温度１００℃以下、同じく９気圧で約１８０℃、同じく１５気圧で約２００℃となる。しかし、加熱管から水がなくなると、その部分は蒸発熱が奪われなくなるので管壁の温度が異常上昇する一方、水蒸気圧は特に変化せず上記した相間が得られなくなる。そのため、加熱管の湯出口の真上の通電されない部分に少量の湯、例えば１ｍｌ程度の湯を溜める湯溜りを設け、この湯溜りからの重力滴下により加熱管内に常に水を補給するようにするのがよい。
【００１０】
また、請求項１において、前記加熱管が負圧になったときに、この加熱管を大
気に連通させる負圧防止弁を前記湯出口の付近に設けるのがよい（請求項３）。飲料抽出が終了し、加熱管への電力供給を停止すると、加熱管内に残存している水蒸気は水に戻り管内に負圧を生じる。この負圧により、原料かすやカプチーノの泡立ちミルクなどを加熱管に吸引すると衛生上の問題を生じ、また目詰まりなどの故障の原因となる。そのため、負圧が生じると大気圧との差圧により自動的に開く負圧防止弁を設け、負圧発生時に大気圧を導入して負圧を解消するのがよい。
【００１１】
請求項１において、前記加熱管の湯出口と前記送湯管の湯入口との間に、湯又は蒸気を取り出すための切換弁を設けることができる（請求項４）。湯あるいは蒸気を単独で取り出したい場合、送湯管を経由すると冷めてしまうという問題がある。そこで、請求項４により切換弁を設ければ、この切換弁を切り換えて湯あるいは水蒸気を直に取り出し、例えば水蒸気はエスプレッソに用いる泡立ちミルクの製造に役立てることができる。
【００１２】
前記加熱管の断面形状は縦長の偏平にするのがよい（請求項５）。水蒸気発生時には、水蒸気は湯を加熱管内に残して先に出て行く必要がある。その際、加熱管の断面形状を縦長にしておくと、この断面の上部を気泡が上昇し、下部を湯が流下して、水蒸気の加熱管の通過と湯分の加熱管内への残留とが円滑に行なわれる。
【００１３】
これに対して、前記送湯管の断面形状は横長の偏平にするのがよい（請求項６）。送湯管は、加熱管で作られた湯を抽出開始前に一時蓄えておく役目をする。加熱管から出た熱湯の先端がすぐに飲料抽出器に入り、飲料原料の粉末を濡らすと、空気の逃げ場が塞がれて高圧を出せない水ポンプでは水を送り込めなくなる。そこで、加熱管から出た湯を一時送湯管に滞留させる。その場合、加熱管からの熱湯は送湯管を一気に下るのではなく、先にある空気を押し出しながら飲料抽出器の手前に達するようにするのがよい。そのためには、送湯管の断面形状を横長の偏平にして断面積を絞り、湯が管断面を満たすようにするとよい。
【００１４】
一方、請求項１において、定量（１杯分）の飲料を一時に抽出するのではなく給水、湯沸し及び沸騰からなる一連の工程を複数回繰り返して必要量の飲料を抽出することも可能である（請求項７）。これにより、１回当たりの抽出量が極僅かになるので、送湯管を小型化することが可能になる。
【００１５】
更に、請求項１において、抽出待機中に送湯管が冷めることによる飲料抽出温度の低下を防ぐには、給水の初期に流量を絞って水蒸気を発生させ、この水蒸気で管内を予熱するようにするのがよい（請求項８）。
【００１６】
飲料を抽出して生じた原料かすは、飲料抽出終了後に過熱蒸気を飲料抽出器に通して乾燥させることができ、これにより原料かすの廃棄が容易になる（請求項９）。
【００１７】
【発明の実施の形態】
以下、図１〜図５に基づいて、例えばエスプレッソを調製する飲料抽出装置に
おけるこの発明の実施の形態を説明する。まず、図１は実施の形態を示すシステム構成図である。図１において、飲料抽出装置は、一端に水が流入する水入口１ａを有し、他端に湯又は水蒸気が流出する湯出口１ｂを有する金属管からなる加熱管１と、水入口１ａに接続された水ポンプ２と、加熱管１の湯出口１ｂに接続された飲料抽出器３と、加熱管１に通電する加熱電源４と、加熱電源４から供給する電力及び水ポンプ２から供給する水の流量を制御する制御部５とを備えている。加熱管１は、内径数ｍｍのステンレス管が円筒コイル状に巻かれ、１０気圧程度の圧力に十分耐え得る構成となっている。また、加熱管１は巻回前に断面横長の偏平に押し潰され、内部を通過する水との接触面積の増大が図られている。
【００１８】
水ポンプ２には、８〜１０気圧程度の吐出圧力を生じる高圧ポンプ、例えば歯車ポンプが用いられ、水ポンプ２は水タンク６に貯留された水道水を加熱管１に圧送する。飲料抽出器３は、加熱管１に結合された蓋体３ａと、これに着脱可能に連結される本体３ｂとからなり、１０気圧の内圧に耐え得る耐圧容器として構成されている。抽出器本体３ｂの底部にはフィルタ７が装着され、その下方に抽出口８が設けられている。抽出器本体３ｂには、フィルタ７上にコーヒー微粉末からなるエスプレッソ原料が１杯分装填される。
【００１９】
加熱電源４は、高周波インバータ９と変成器１０とからなり、変成器１０の２次側端子から低電圧、大電流（例えば５ｖ，５００Ａ）の電力が加熱管１に供給される。ここで、加熱管１は水入口側から湯出口側に向って区間長さが順次大きくなる複数の通電区間に分けられ、各通電区間は隣接する通電区間の電流の向きが互いに逆になるようにして、加熱電源４の２次側端子に互いに並列に接続されている。これにより、水温の低い水が送入される水入口１ａに近い通電区間ほど、加熱管１に供給される電力の電力密度が高くなるように設定されている。制御部５はマイクロプロセッサからなり、予め定められたプログラムに従って、水ポンプ２の流量Ｑ及び加熱管１への投入電力Ｐを制御する。
【００２０】
図１の飲料抽出装置において、例えば５０ｍｌのエスプレッソを約１９秒で抽出するとすると、水ポンプ２の流量は２．５ｍｌ／ｓとなる。そこで、この流量で水ポンプ２を運転しながら、１ｋＷの電力を加熱管１に投入すると、常温（約２０℃）の水は約１００℃に加熱される。加熱管１には加熱待機中に５〜１０ｍｌ程度の常温の水が残留しているので、加熱管１の湯出口からは８０℃程度の湯が飲料抽出器３に水ポンプ２の吐出圧で押し込まれる。この湯はエスプレッソ原料と接触してそのエキスを抽出し、エスプレッソ飲料となって抽出口８からカップ１１に注入される。そのときの飲料温度は約７０℃になる。
【００２１】
５０ｍｌの給水が終了したら、水ポンプ２の流量を極端に、例えば０．３ｍｌ／ｓ程度に絞り、引き続き同じ電力を数秒間投入する。これにより、加熱管１の湯出口温度は１８０℃程度まで上昇し、１００℃を超える過熱蒸気が噴出する。この水蒸気は飲料原料を通過して、飲料抽出器３内に残留している、例えば１０ｍｌ程度の抽出飲料を無駄なく押し出し、更に原料かすを乾燥させる。その後、水ポンプ２及び加熱電源を停止する。飲料抽出後は、飲料抽出器本体３ｂを取り外し、原料かすを廃棄する。なお、エスプレッソの上に載せる泡立ちミルクは、加熱管１から蒸気のみを取り出して作ることができる。
【００２２】
図２は、請求項１に係る実施の形態を示す飲料抽出装置のシステム構成図である。第１の実施の形態と対応する部分には同一の符号を用いてある。図２において、飲料抽出装置は、一端に水が流入する水入口１ａを有し、他端に湯又は水蒸気が流出する湯出口１ｂを有する金属管からなり、水入口１ａから湯出口１ｂに向って上向き（図示の場合は垂直上向き）に設置された加熱管１と、一端に湯又は水蒸気が流入する湯入口１２ａを有し、他端に湯又は水蒸気が流出する湯出口１２ｂを有する管からなり、湯入口１２ａから湯出口１２ｂに向って下向き（図示の場合は垂直下向き）に設置されるとともに、湯入口１２ａが加熱管１の湯出口１ｂに接続された送湯管１２と、加熱管１の水入口１ａに逆止弁１３を介して接続された水ポンプ２と、送湯管１２の湯出口１３ｂに接続された飲料抽出器３と、加熱管１に通電する加熱電源４と、この加熱電源４から供給する電力及び水ポンプ２から供給する水の流量を制御する制御部５とを備えている。
【００２３】
ここで、加熱管１の湯出口１ｂの真上には、直立した円弧状の曲管からなる湯溜り１４が加熱管１の延長として一体に設けられ、その上端と送湯管１２の湯入口１２ａとは、三方弁からなる切換弁１５を介して中継管１６により接続されている。切換弁１５には、湯又は蒸気を単独で取り出すための湯出し管１７が取り付けられている。加熱管１の湯出口１ｂの付近、いまの場合は湯溜り１４の上端付近には、中継管１６から直立するように、負圧防止弁１８が接続されている。負圧防止弁１８は一種の逆止弁で、加熱管１が負圧になると開き、加熱管１を大気に連通させる。水ポンプ２はこの場合も歯車ポンプが使われているが、後述するように飲料抽出器３への湯の押し込みは、この実施の形態では蒸気圧で行なうので、水ポンプ２の吐出圧は１気圧以下の低圧でよい。飲料抽出器３、加熱電源４、水タンク６は第１の実施の形態と実質的に同じである。
【００２４】
加熱管１は内径５〜７ｍｍのステンレス管が円筒コイル状に巻かれて、１０気圧以上の圧力に耐え得るように構成され、図２に断面を拡大して示すように、断面形状が縦長の偏平（例えば内径で長径６〜８ｍｍ，短径３〜４ｍｍ）に形成されている。送湯管１２は、加熱管１よりもやや小径の内径４〜６ｍｍのステンレス管が円筒コイル状に巻かれて、１０気圧以上の圧力に耐え得るように構成され、図２に示すように断面形状が横長の偏平（例えば内径で長径５〜７ｍｍ，短径２〜３ｍｍ）に形成されている。湯溜り１４は加熱管１の延長として、縦長断面の直立した円弧状に設けられている。１９、２０及び２１は温度センサで、それぞれ加熱管１の入口温度Ｔ１、同出口温度Ｔ２及び送湯管１２の出口温度Ｔ３を測定するものである。また、２２は圧力センサで、加熱管１の入口圧力を測定するものである。
【００２５】
図２の飲料抽出装置の動作を図３〜図６のタイムチャートに基づいて説明すると、以下の通りである。まず図３は、通常の飲料抽出動作を示すものである。図３において、時点ｔ１〜ｔ２は始動直後の予熱動作で、極わずかの流量、例えば０．３ｍｌ／ｓで最大電力約１ｋＷを投入すると、数秒で加熱管１の出口温度Ｔ２は１００℃を超えて、水蒸気を送湯管１２や飲料抽出器３に送り出す。時点ｔ２〜ｔ３の十数秒は湯沸し動作で、約３ｍｌ／ｓの流量で１ｋＷの電力を供給すると、約２０℃の水が９０〜１００℃となり、約１７秒で５０ｍｌの熱湯が得られる。この熱湯は大部分が送湯管１２に送られて蓄えられ、残りは加熱管１及び湯溜り１４内に滞留する。湯沸し時間は水タンク６の水を予熱しておくことにより短縮することができ、例えば６０℃程度に予熱しておけば約９秒で５０ｍｌの熱湯が得られる。
【００２６】
時点ｔ３で給水を中止して、加圧抽出動作に入る。１ｋＷの電力は供給しているので、加熱管１内の湯は直ちに沸騰を開始し、送湯管１２の熱湯は水蒸気圧で飲料抽出器３に押し込まれて抽出を開始する。次いで供給電力を絞り、加熱管１内の湯の蒸発を維持しながら抽出を続ける。そのとき、加熱管１の出口温度Ｔ２は約１８０℃、蒸気圧は約１０気圧になっている。この蒸発中、加熱管１の内部では、図２に示すように、加熱管１の縦長断面の底部に溜まった湯２３が順次蒸発し、その上部空間を蒸気２４が上に向って移動する。この蒸気と一緒に持ち上げられた水滴は湯溜り１４で分離され、その内壁を伝わって加熱管１内に滴下回収される。
【００２７】
金属管１の水入口１ａ付近は電力密度が高いので、管壁の異常過熱が生じやすい。また、水ポンプ２の故障で給水されないか、流量予定よりが少なければ異常過熱される。そこで、もし入口温度Ｔ１が異常に、例えば１００℃あるいはそれ以上に上昇したら、制御部５は供給電力を絞るか遮断する。また、金属管１内の水が完全に蒸発すると空焚き状態となり、管壁が異常過熱される。そこで、もし出口温度Ｔ２が異常に、例えば２５０℃あるいはそれ以上に上昇したら、その場合も制御部５は電力を絞るか遮断する。更に、制御部５は圧力センサ２２により加熱管１の入口圧力ｐを監視し、圧力ｐが異常に、例えば１５気圧あるいはそれ以上に上昇したら、電力を絞るか遮断する。
【００２８】
加熱管１で発生する水蒸気の温度（圧力）を供給電力で制御しながら抽出を続け、送湯管１２内の熱湯の後尾、つまり加圧蒸気との境界が送湯管１２の湯出口１２ｂに達すると、温度Ｔ３が１００℃を超えるので、制御部５はこれにより抽出完了を検知し、時点ｔ４で加熱電力を遮断する。熱湯が飲料抽出器３を通過すると抽出口８から水蒸気が噴出し、加熱管１内は大気圧に戻る。加熱管１内が大気圧に戻ると、加熱管１にはまだ湯が残っているので１００℃以上の部分は直ちに１００℃まで冷却され、続いて常温に向けて冷却される。一方、送湯管１２には湯は残っていないので、約１８０℃から徐々に常温に向けて冷却される。このとき、水蒸気が覆水すると、水蒸気のあった部分が負圧になる。すると、負圧防止弁１８が開き、加熱管１内を大気に連通させる。これにより負圧が解消され、原料かすや泡立ちミルクが加熱管１内に吸引されて、管内を汚したり目詰まりを起こしたりすることが防止される。
【００２９】
次に、図４は上記した飲料抽出後の洗浄動作を示すものである。図４において、時点ｔ１１から、時点ｔ２におけると同様に給水湯沸し動作を数秒行ない、次いで時点ｔ１２で加圧抽出動作を数秒行うことで、熱湯を蒸気圧で空の飲料抽出器３に激しく吹き付け、飲料抽出器３の消毒洗浄を行なう。
【００３０】
次に、図５は水蒸気又は湯を単独で取り出す動作を示すものである。切換弁１５を切り換えて加熱管１と湯出し管１７を連通させ、所要の流量、例えば０．５ｍｌ／ｓで給水し、同時にこの流量に見合う電力を加熱管１に投入する。この流量と電力の制御を適切に行なうことにより、数秒で１００℃の乾き蒸気あるいは湿り蒸気を自由に取り出すことができる。また、流量あるいは電力を変えれば、任意の温度の湯を取り出すことができる。水蒸気はミルクの泡立てなどに使用される。
【００３１】
最後に、図６は湯沸しと加圧抽出とを小刻みに交互に繰り返す飲料抽出動作を示すものである。すなわち、時点ｔ３１で給水・湯沸かしを開始し、数秒後の時点ｔ３２で抽出を開始する。以後、これを繰り返し（図示は３回）、時点ｔ３７で抽出を完了する。このような抽出動作には、次のような利点がある。
１）回当たりの抽出量が少なくなるので、送湯管１２や湯溜り１４の容積を小さくすることができる。
２）送湯管１２の熱容量が小さくなるので、予熱動作を省略することが可能になる。
３）送湯管１２の熱容量が小さくなれば、蒸気を抽出口８から直接取り出すようにして、切換弁１５を省略することが可能になる。
４）飲料原料が複数回１００℃又はそれ以上の水蒸気に曝されるので、より風味のある飲料の抽出が可能になる。
５）複数回の抽出動作を行なうので、最初に原料粉末が水に濡れて目詰まりを起こしても、以後の動作で正常な抽出が期待できる。
また、図６に示すように、各抽出動作の終期に水蒸気を抽出口８から吐き出して管内が大気圧に戻った時、電力の供給を開始する前に、直ちに給水を開始することで、負圧防止弁１８の操作を省略することができ、また確実に給水を引き込むことができる。その結果、微妙な制御操作に気を配ることなく、効率よく短時間で風味の良い飲料を抽出することが可能になる。
【００３２】
上記した実施の形態において、制御部５は予め定められたプログラムにより、開ループで加熱管１の電力を制御する例を説明したが、加熱管１内の水の温度及び必要に応じて蒸気圧の検出値に基づいて閉ループ制御を行なうことももちろん可能である。また、この発明は、エスプレッソの調製のみならず、レギュラーコーヒーや茶、漢方薬など、熱湯により原料からエキスを加圧抽出する各種の用途に適用可能である。
【００３３】
【発明の効果】
以上の通り、この発明によれば、水ポンプにより加熱管に水を供給しながら通電して湯を沸かし、この湯を水ポンプの吐出圧により、あるいは水蒸気の圧力により飲料抽出器に押し込み、高温高圧の湯で飲料を加圧抽出することにより、高圧を要するエスプレッソなどの飲料抽出においても風味の良い高品質の飲料が得られる。
【図面の簡単な説明】
【図１】第１の実施の形態を示す飲料抽出装置のシステム構成図である。
【図２】この発明の第２の実施の形態を示す飲料抽出装置のシステム構成図である。
【図３】図１の装置の飲料抽出動作を示すタイムチャートである。
【図４】図１の装置の飲料抽出器洗浄動作を示すタイムチャートである。
【図５】図１の装置の湯又は水蒸気単独の取り出し動作を示すタイムチャートである。
【図６】図１の装置の湯沸しと加圧抽出の繰り返しによる飲料抽出動作を示すタイムチャートである。
【符号の説明】
１加熱管
１ａ水入口
１ｂ水出口
２水ポンプ
３飲料抽出器
４加熱電源
５制御部
６水タンク
７フィルタ
８飲料抽出口
１２送湯管
１２ａ湯入口
１２ｂ湯出口
１３逆止弁
１４湯溜り
１５切換弁
１６中継管
１７湯出し管
１８負圧防止弁
１９温度センサ
２０温度センサ
２１温度センサ
２２圧力センサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for pressurizing and extracting a beverage through hot water through beverage ingredients such as coffee powder and tea leaves, and more particularly to an apparatus suitable for extracting a beverage at a high pressure of several atmospheres or more, such as espresso.
[0002]
[Prior art]
This type of beverage extraction device is known to boil and store hot water in advance, pressurize the hot water with air pressure or a piston when extracting the beverage, pass it through the beverage ingredients, and extract the beverage. Used in machines.
[0003]
[Problems to be solved by the invention]
However, in such a conventional beverage extraction device, it is unavoidable that the hot water is cooled until it reaches the beverage raw material from the hot water storage tank through the piping system, the pressurizing chamber or the like, and it is difficult to extract a hot beverage with a good flavor. Met. In addition, pressurization of hot water with air pressure or piston makes it impossible to obtain a high extraction pressure. Therefore, the particle size of the raw material powder passing through the hot water cannot be made very fine, so extraction of beverages such as espresso using fine powder raw materials It was not always suitable.
[0004]
Therefore, an object of the present invention is to make it possible to easily extract a high-quality beverage using high-temperature and high-pressure hot water.
[0005]
[Means for Solving the Problems]
Electricity is supplied while passing water through a heating pipe made of a metal pipe, and hot water heated and boiled by the heating pipe generated by this energization is sent to the beverage extractor to extract the beverage. That is, the beverage extraction device of the present invention is connected to the water inlet having a water inlet through which water flows in at one end and a metal pipe having a hot water outlet through which hot water or steam flows out at the other end. A water pump, a beverage extractor connected to the hot water outlet of the heating pipe, bringing hot water into contact with the contained beverage ingredients and extracting the beverage through a filter, a heating power supply for energizing the heating pipe, and a supply from this heating power supply And a means for controlling the flow rate of the water supplied from the water pump and supplying water by the water pump. The heating pipe is energized, and the water is heated by the heat generation of the heating pipe by the energization. The water is pushed into the extractor with the discharge pressure of the water pump to extract a predetermined amount of beverage from the beverage raw material and delivered from the extraction port, and then the water supply and energization are stopped .
[0006]
According to this beverage extraction apparatus , the hot water boiled in the heating tube is directly supplied to the beverage extractor, so that the hot water is not cooled. Further, since the heating tube can be composed of a metal tube having an inner diameter of several mm, it can withstand high pressure, and for example, a high pressure of 8 atmospheres (gauge pressure, hereinafter the same) can be easily applied to the beverage extractor. Furthermore, by appropriately controlling the flow rate of the water pump and the power supplied to the heating pipe, the hot water temperature can be freely controlled, and if necessary, superheated steam at 100 ° C. or higher can be fed into the beverage extractor.
[0007]
This beverage extraction device generates the beverage extraction pressure by the discharge pressure of the water pump, but the beverage extraction pressure can also be obtained from the vapor pressure. Such a beverage extraction device of the present invention comprises a metal pipe having a water inlet through which water flows at one end and a hot water outlet through which hot water or steam flows out at the other end, and is directed from the water inlet to the hot water outlet. A heating pipe installed upward and a pipe having a hot water inlet through which hot water or steam flows in at one end and a hot water outlet through which hot water or steam flows out at the other end, from the hot water inlet to the hot water outlet. A hot water pipe connected to the hot water outlet of the heating pipe, a water pump connected to the water inlet of the heating pipe via a check valve, and the heating pipe A beverage extractor that is connected to a hot water outlet of the beverage and extracts hot beverage through a filter by bringing hot water into contact with the loaded beverage ingredients, a heating power source for energizing the heating pipe, and power supplied from the heating power source and the water pump Hands controlling the flow rate of water supplied from The heating pipe is energized while supplying water by the water pump, the water is heated by the heat generation of the heating pipe by this energization, the hot water is boiled, and the hot water is temporarily stored in the hot water supply pipe When the water supply from the water pump reaches a fixed amount, the water supply is stopped to boil the water in the heating pipe, the hot water in the hot water supply pipe is pushed into the extractor with the generated vapor pressure, and a fixed amount is obtained from the beverage ingredients. After the beverage is extracted and sent out from the extraction port, the energization is stopped (Claim 1) .
[0008]
According to the beverage extraction apparatus of this first aspect , hot water is pushed into the beverage extractor with steam obtained by boiling the water in the metal tube, so there is no need to use an expensive high-pressure pump as the water pump. Back flow of water to the water pump side is blocked by a check valve.
[0009]
In claim 1 , a hot water reservoir is preferably provided at the hot water outlet of the heating pipe ( claim 2 ). In the generation of water vapor pressure due to boiling of feed water, if there is water in the heating tube, there is an accurate correlation between the water vapor pressure and the water vapor temperature, for example, a water vapor pressure of 0 atm (atmospheric pressure) and a water vapor temperature of 100 ° C. or less, Similarly, the pressure is about 180 ° C. at 9 atmospheres and about 200 ° C. at 15 atmospheres. However, when there is no water in the heating tube, the heat of vaporization is not removed from that portion, so the temperature of the tube wall rises abnormally. On the other hand, the water vapor pressure does not change and the above-mentioned phase cannot be obtained. For this reason, a hot water reservoir for storing a small amount of hot water, for example, about 1 ml of hot water, is provided in the non-energized portion directly above the hot water outlet of the heating tube, and water is always supplied into the heating tube by gravity dropping from the hot water reservoir. It is good.
[0010]
Further, in claim 1 , it is preferable to provide a negative pressure prevention valve in the vicinity of the hot water outlet for communicating the heating pipe with the atmosphere when the heating pipe becomes negative pressure ( claim 3 ). When the beverage extraction is completed and the power supply to the heating pipe is stopped, the water vapor remaining in the heating pipe returns to the water and creates a negative pressure in the pipe. This negative pressure causes hygiene problems when sucking raw material residue, cappuccino foamed milk, etc. into the heating tube, and causes troubles such as clogging. Therefore, it is preferable to provide a negative pressure prevention valve that automatically opens when a negative pressure occurs due to a differential pressure from the atmospheric pressure, and to introduce the atmospheric pressure when the negative pressure is generated to eliminate the negative pressure.
[0011]
In Claim 1 , the switching valve for taking out hot water or a vapor | steam can be provided between the hot water outlet of the said heating pipe, and the hot water inlet of the said hot water feeding pipe ( Claim 4 ). When it is desired to take out hot water or steam alone, there is a problem that the hot water or steam is cooled through the hot water supply pipe. Therefore, if a switching valve is provided according to the fourth aspect , the switching valve is switched to directly take out hot water or water vapor. For example, the water vapor can be used for the production of frothed milk used for espresso.
[0012]
The cross-sectional shape of the heating tube is preferably a vertically long flat shape ( Claim 5 ). When steam is generated, the steam needs to leave the hot water in the heating tube. At that time, if the cross-sectional shape of the heating tube is set to be vertically long, bubbles rise in the upper part of the cross-section and hot water flows down in the lower part, so that steam passes through the heating tube and remains in the heating tube. It is done smoothly.
[0013]
On the other hand, the cross-sectional shape of the hot-water supply pipe is preferably a horizontally long flat ( Claim 6 ). The hot water supply pipe serves to temporarily store the hot water produced by the heating pipe before starting the extraction. If the tip of hot water coming out of the heating tube immediately enters the beverage extractor and wets the powder of the beverage raw material, the water pump cannot close the air escape area and cannot supply water. Therefore, the hot water that has come out of the heating pipe is retained in the temporary hot water supply pipe. In that case, the hot water from the heating pipe should not reach the hot water feeding pipe all at once, but should reach the front of the beverage extractor while extruding the existing air. For this purpose, it is preferable to make the cross-sectional shape of the hot water feeding pipe horizontally long and flat so that the cross-sectional area is reduced so that the hot water fills the pipe cross section.
[0014]
On the other hand, in claim 1 , it is also possible to extract a necessary amount of beverage by repeating a series of steps consisting of water supply, boiling and boiling instead of extracting a fixed amount (one cup) of beverage at a time. ( Claim 7 ). Thereby, since the extraction amount per time becomes very small, it becomes possible to reduce the size of the hot water supply pipe.
[0015]
Furthermore, in claim 1 , in order to prevent the beverage extraction temperature from being lowered due to cooling of the hot water supply pipe during standby for extraction, the flow rate is reduced at the initial stage of water supply to generate water vapor, and the water is preheated in the pipe. ( Claim 8 ).
[0016]
The raw material residue generated by extracting the beverage can be dried by passing superheated steam through the beverage extractor after the beverage extraction is completed, thereby facilitating the disposal of the raw material residue ( Claim 9 ).
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on FIGS. 1-5, embodiment of this invention in the drink extractor which prepares espresso, for example is described. First, FIG. 1 is a system configuration diagram showing an embodiment . In FIG. 1, the beverage extraction apparatus is connected to a water inlet 1a, which has a water inlet 1a through which water flows in at one end and a metal pipe having a hot water outlet 1b through which hot water or steam flows out at the other end. Water pump 2, beverage extractor 3 connected to hot water outlet 1 b of heating tube 1, heating power source 4 energizing heating tube 1, power supplied from heating power source 4 and water supplied from water pump 2 The control part 5 which controls the flow volume of the is provided. The heating tube 1 is configured such that a stainless steel tube having an inner diameter of several mm is wound in a cylindrical coil shape and can sufficiently withstand a pressure of about 10 atmospheres. Further, the heating tube 1 is crushed into a horizontally long flat cross section before winding, so that the contact area with water passing through the inside is increased.
[0018]
The water pump 2 is a high-pressure pump that generates a discharge pressure of about 8 to 10 atm, for example, a gear pump. The water pump 2 pumps tap water stored in the water tank 6 to the heating pipe 1. The beverage extractor 3 includes a lid 3a coupled to the heating tube 1 and a main body 3b removably coupled thereto, and is configured as a pressure-resistant container that can withstand an internal pressure of 10 atm. A filter 7 is attached to the bottom of the extractor body 3b, and an extraction port 8 is provided therebelow. The extractor body 3b is loaded with one cup of espresso material made of fine coffee powder on the filter 7.
[0019]
The heating power source 4 includes a high-frequency inverter 9 and a transformer 10, and low voltage and large current (for example, 5 v, 500 A) power is supplied to the heating tube 1 from the secondary side terminal of the transformer 10. Here, the heating tube 1 is divided into a plurality of energization sections whose section lengths are sequentially increased from the water inlet side to the hot water outlet side, and each energization section is configured such that the directions of current in adjacent energization sections are opposite to each other. Thus, the secondary terminals of the heating power source 4 are connected in parallel to each other. Thereby, it sets so that the power density of the electric power supplied to the heating pipe | tube 1 may become high, so that the electricity supply area close | similar to the water inlet 1a into which water with low water temperature is sent. The control unit 5 includes a microprocessor, and controls the flow rate Q of the water pump 2 and the input power P to the heating pipe 1 according to a predetermined program.
[0020]
In the beverage extraction device of FIG. 1, for example, if 50 ml of espresso is extracted in about 19 seconds, the flow rate of the water pump 2 is 2.5 ml / s. Therefore, when 1 kW of electric power is input to the heating pipe 1 while operating the water pump 2 at this flow rate, water at room temperature (about 20 ° C.) is heated to about 100 ° C. Since about 5 to 10 ml of water at room temperature remains in the heating pipe 1 during the heating standby, hot water of about 80 ° C. is discharged from the hot water outlet of the heating pipe 1 to the beverage extractor 3 by the discharge pressure of the water pump 2. Pushed in. This hot water comes into contact with the espresso raw material to extract the extract, becomes an espresso drink, and is poured into the cup 11 from the extraction port 8. The beverage temperature at that time is about 70 ° C.
[0021]
When 50 ml of water supply is completed, the flow rate of the water pump 2 is extremely reduced to, for example, about 0.3 ml / s, and the same power is continuously applied for several seconds. Thereby, the hot water outlet temperature of the heating tube 1 rises to about 180 ° C., and superheated steam exceeding 100 ° C. is ejected. The water vapor passes through the beverage raw material, and extrudes, for example, about 10 ml of the extracted beverage remaining in the beverage extractor 3 without waste, and further dries the raw material residue. Thereafter, the water pump 2 and the heating power supply are stopped. After beverage extraction, the beverage extractor body 3b is removed and the raw material waste is discarded. The foamed milk placed on the espresso can be made by taking only the steam from the heating tube 1.
[0022]
FIG. 2 is a system configuration diagram of a beverage extraction device showing an embodiment according to claim 1 . The same reference numerals are used for portions corresponding to those in the first embodiment. In FIG. 2, the beverage extraction apparatus is composed of a metal pipe having a water inlet 1a through which water flows in at one end and a hot water outlet 1b through which hot water or steam flows out at the other end, from the water inlet 1a to the hot water outlet 1b. A heating pipe 1 installed upward (vertically upward in the illustrated case), and a pipe having a hot water inlet 12a through which hot water or steam flows into one end and a hot water outlet 12b through which hot water or steam flows out at the other end. The hot water inlet 12a is installed downward from the hot water inlet 12a toward the hot water outlet 12b (vertically downward in the illustrated case), and the hot water inlet 12a is connected to the hot water outlet 1b of the heating pipe 1, and the heating pipe A water pump 2 connected to one water inlet 1a via a check valve 13, a beverage extractor 3 connected to a hot water outlet 13b of a hot water supply pipe 12, a heating power source 4 for energizing the heating pipe 1, Electric power and water pump 2 supplied from the heating power source 4 And a control unit 5 for controlling the flow rate of the al supplying water.
[0023]
Here, immediately above the hot water outlet 1 b of the heating pipe 1, a hot water reservoir 14 made of an upright arc-shaped curved pipe is integrally provided as an extension of the heating pipe 1, and its upper end and the hot water inlet of the hot water feeding pipe 12 are provided. 12a is connected by the relay pipe 16 via the switching valve 15 which consists of a three-way valve. A hot water discharge pipe 17 for taking out hot water or steam independently is attached to the switching valve 15. A negative pressure prevention valve 18 is connected near the hot water outlet 1 b of the heating pipe 1, in this case, near the upper end of the hot water reservoir 14 so as to stand upright from the relay pipe 16. The negative pressure prevention valve 18 is a kind of check valve, which opens when the heating pipe 1 becomes negative pressure, and allows the heating pipe 1 to communicate with the atmosphere. In this case, a gear pump is also used as the water pump 2. However, as described later, the hot water is pushed into the beverage extractor 3 by steam pressure in this embodiment, so that the discharge pressure of the water pump 2 is 1. It may be a low pressure below atmospheric pressure. The beverage extractor 3, the heating power source 4, and the water tank 6 are substantially the same as those in the first embodiment.
[0024]
The heating tube 1 is configured such that a stainless steel tube having an inner diameter of 5 to 7 mm is wound in a cylindrical coil shape and can withstand a pressure of 10 atmospheres or more. As shown in an enlarged cross-sectional view in FIG. It is formed in a flat shape (for example, an inner diameter having a major axis of 6 to 8 mm and a minor axis of 3 to 4 mm). The hot water supply pipe 12 is configured such that a stainless steel pipe having an inner diameter of 4 to 6 mm, which is slightly smaller in diameter than the heating pipe 1, is wound in a cylindrical coil shape and can withstand a pressure of 10 atmospheres or more, and has a cross section as shown in FIG. The shape is formed in a horizontally long flat shape (for example, the inner diameter is 5 to 7 mm in the major axis and the minor axis is 2 to 3 mm). The hot water reservoir 14 is provided as an extension of the heating tube 1 in an upright arc shape with a vertically long cross section. Reference numerals 19, 20 and 21 denote temperature sensors for measuring the inlet temperature T1, the outlet temperature T2, and the outlet temperature T3 of the hot water supply pipe 12, respectively. A pressure sensor 22 measures the inlet pressure of the heating tube 1.
[0025]
The operation of the beverage extraction device of FIG. 2 will be described as follows based on the time charts of FIGS. First, FIG. 3 shows a normal beverage extraction operation. In FIG. 3, time points t1 to t2 are preheating operations immediately after starting, and when a maximum power of about 1 kW is applied at an extremely small flow rate, for example, 0.3 ml / s, the outlet temperature T2 of the heating tube 1 exceeds 100 ° C. in a few seconds. Then, the steam is sent out to the hot water supply pipe 12 and the beverage extractor 3. Ten seconds from the time t2 to t3 is a water boiling operation. When 1 kW of electric power is supplied at a flow rate of about 3 ml / s, water at about 20 ° C. becomes 90 to 100 ° C., and 50 ml of hot water is obtained in about 17 seconds. Most of the hot water is sent to and stored in the hot water supply pipe 12, and the remainder remains in the heating pipe 1 and the hot water reservoir 14. The water boiling time can be shortened by preheating the water in the water tank 6. For example, if the water is preheated to about 60 ° C., 50 ml of hot water can be obtained in about 9 seconds.
[0026]
Water supply is stopped at time t3 and the pressure extraction operation is started. Since 1 kW of electric power is supplied, the hot water in the heating pipe 1 immediately starts boiling, and the hot water in the hot water feeding pipe 12 is pushed into the beverage extractor 3 by the water vapor pressure to start extraction. Next, extraction is continued while the supply power is reduced and the evaporation of hot water in the heating tube 1 is maintained. At that time, the outlet temperature T2 of the heating tube 1 is about 180 ° C., and the vapor pressure is about 10 atmospheres. During the evaporation, as shown in FIG. 2, the hot water 23 accumulated at the bottom of the vertically long cross section of the heating tube 1 sequentially evaporates, and the steam 24 moves upward in the upper space. The water droplets lifted together with the steam are separated by the hot water reservoir 14 and are dropped and collected in the heating tube 1 along the inner wall.
[0027]
Since the power density is high in the vicinity of the water inlet 1a of the metal tube 1, abnormal overheating of the tube wall is likely to occur. Further, if water is not supplied due to a failure of the water pump 2 or if the flow rate is less than the planned flow rate, abnormal heating occurs. Therefore, if the inlet temperature T1 is abnormally increased, for example, to 100 ° C. or higher, the control unit 5 reduces or cuts off the supplied power. Further, when the water in the metal tube 1 is completely evaporated, it becomes an empty state, and the tube wall is abnormally overheated. Therefore, if the outlet temperature T2 is abnormally increased, for example, to 250 ° C. or higher, the control unit 5 also reduces or cuts off the electric power. Further, the control unit 5 monitors the inlet pressure p of the heating pipe 1 by the pressure sensor 22, and when the pressure p rises abnormally, for example, to 15 atm or more, the electric power is reduced or cut off.
[0028]
Extraction is continued while controlling the temperature (pressure) of the water vapor generated in the heating pipe 1 with the supply power, and the tail of the hot water in the hot water supply pipe 12, that is, the boundary with the pressurized steam is at the hot water outlet 12 b of the hot water supply pipe 12. When the temperature reaches, the temperature T3 exceeds 100 ° C., so that the control unit 5 detects the completion of extraction, and cuts off the heating power at time t4. When hot water passes through the beverage extractor 3, water vapor is ejected from the extraction port 8, and the inside of the heating tube 1 returns to atmospheric pressure. When the inside of the heating tube 1 returns to the atmospheric pressure, hot water still remains in the heating tube 1, so that the portion of 100 ° C. or higher is immediately cooled to 100 ° C. and then cooled to room temperature. On the other hand, since no hot water remains in the hot water supply pipe 12, it is gradually cooled from about 180 ° C. to room temperature. At this time, when the water vapor is covered, the portion where the water vapor is present becomes negative pressure. Then, the negative pressure prevention valve 18 is opened, and the inside of the heating pipe 1 is communicated with the atmosphere. As a result, the negative pressure is eliminated, and raw material residue and foamed milk are sucked into the heating tube 1 to prevent the tube from becoming dirty or clogged.
[0029]
Next, FIG. 4 shows the washing operation after the beverage extraction described above. In FIG. 4, from time t11, the hot water boiling operation is performed for several seconds in the same manner as at time t2, and then the pressure extraction operation is performed for several seconds at time t12. The beverage extractor 3 is disinfected and cleaned.
[0030]
Next, FIG. 5 shows the operation of taking out steam or hot water alone. The switching valve 15 is switched to allow the heating pipe 1 and the hot water discharge pipe 17 to communicate with each other, and water is supplied at a required flow rate, for example, 0.5 ml / s. By appropriately controlling the flow rate and power, dry steam or wet steam at 100 ° C. can be taken out in a few seconds. Moreover, hot water at an arbitrary temperature can be taken out by changing the flow rate or electric power. Steam is used for whipping milk.
[0031]
Finally, FIG. 6 shows a beverage extraction operation in which boiling water and pressurized extraction are alternately repeated in small increments. That is, water supply / water heating is started at time t31, and extraction is started at time t32 several seconds later. Thereafter, this is repeated (three times in the figure), and the extraction is completed at time t37. Such an extraction operation has the following advantages.
1) Since the extraction amount per time is reduced, the volume of the hot water supply pipe 12 and the hot water reservoir 14 can be reduced.
2) Since the heat capacity of the hot water supply pipe 12 is reduced, it is possible to omit the preheating operation.
3) If the heat capacity of the hot water supply pipe 12 is reduced, the steam can be directly taken out from the extraction port 8 and the switching valve 15 can be omitted.
4) Since the beverage ingredients are exposed to water vapor at 100 ° C. or more a plurality of times, a more flavorful beverage can be extracted.
5) Since the extraction operation is performed a plurality of times, normal extraction can be expected in the subsequent operation even if the raw material powder first gets wet with water and becomes clogged.
Further, as shown in FIG. 6, when water vapor is discharged from the extraction port 8 at the end of each extraction operation and the inside of the pipe returns to the atmospheric pressure, water supply is started immediately before the supply of power is started. The operation of the pressure prevention valve 18 can be omitted, and water supply can be reliably drawn. As a result, it is possible to efficiently extract a savory beverage in a short time without paying attention to delicate control operations.
[0032]
In the above-described embodiment, the example in which the control unit 5 controls the power of the heating tube 1 in an open loop according to a predetermined program has been described. However, the temperature of the water in the heating tube 1 and the vapor pressure as necessary It is of course possible to perform closed-loop control based on the detected value. The present invention is applicable not only to the preparation of espresso but also to various uses such as regular coffee, tea, Chinese herbal medicine, etc., in which an extract is extracted from a raw material with hot water under pressure.
[0033]
【The invention's effect】
As described above, according to the present invention, while supplying water to the heating tube by the water pump, the hot water is heated to boil, and the hot water is pushed into the beverage extractor by the discharge pressure of the water pump or by the pressure of water vapor. By extracting the beverage under pressure with high-pressure hot water, a high-quality beverage with a good flavor can be obtained even in beverage extraction such as espresso that requires high pressure.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a system configuration diagram of a beverage extraction device showing a first embodiment.
FIG. 2 is a system configuration diagram of a beverage extraction device showing a second embodiment of the present invention.
FIG. 3 is a time chart showing a beverage extraction operation of the apparatus of FIG. 1;
FIG. 4 is a time chart showing a beverage extractor cleaning operation of the apparatus of FIG. 1;
FIG. 5 is a time chart showing an operation of taking out hot water or water vapor alone in the apparatus of FIG. 1;
6 is a time chart showing a beverage extraction operation by repeated boiling of water and pressure extraction in the apparatus of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heating pipe 1a Water inlet 1b Water outlet 2 Water pump 3 Beverage extractor 4 Heating power supply 5 Control part 6 Water tank 7 Filter 8 Beverage extraction port 12 Hot water supply pipe 12a Hot water inlet 12b Hot water outlet 13 Check valve 14 Hot water reservoir 15 Switching Valve 16 Relay pipe 17 Hot water discharge pipe 18 Negative pressure prevention valve 19 Temperature sensor 20 Temperature sensor 21 Temperature sensor 22 Pressure sensor

Claims

It has a water inlet through which water flows in at one end and a metal pipe having a hot water outlet through which hot water or steam flows out at the other end, and a heating pipe installed upward from the water inlet toward the hot water outlet;
It has a hot water inlet through which hot water or steam flows at one end and a pipe having a hot water outlet through which the hot water or steam flows out at the other end, and is installed downward from the hot water inlet to the hot water outlet. A hot water supply pipe whose inlet is connected to the hot water outlet of the heating pipe;
A water pump connected to the water inlet of the heating pipe via a check valve;
A beverage extractor connected to the hot water outlet of the heating tube and extracting the beverage through a filter by bringing hot water into contact with the loaded beverage ingredients;
A heating power source for energizing the heating tube;
Means for controlling the power supplied from the heating power source and the flow rate of water supplied from the water pump,
While supplying water by the water pump, the heating pipe is energized, the water is heated by the heat generation of the heating pipe to boil hot water, the hot water is temporarily stored in the hot water supply pipe, and from the water pump. When the amount of water supply reaches a fixed amount, the water supply is stopped to boil the water in the heating pipe, the hot water in the hot water supply pipe is pushed into the extractor with the generated vapor pressure, and a predetermined amount of beverage is extracted from the beverage ingredients. The beverage extraction apparatus characterized by stopping energization of the heating tube after being fed out from the extraction port.

The beverage extraction apparatus according to claim 1, wherein a hot water reservoir is provided immediately above the hot water outlet of the heating pipe.

2. The beverage extraction device according to claim 1 , wherein a negative pressure prevention valve is provided in the vicinity of the hot water outlet to connect the heating pipe to the atmosphere when the heating pipe becomes negative.

The beverage extraction device according to claim 1 , wherein a switching valve for taking out hot water or steam is provided between the hot water outlet of the heating pipe and the hot water inlet of the hot water feeding pipe.

2. The beverage extraction device according to claim 1, wherein the heating tube has a vertically long cross section.

The beverage extraction device according to claim 1, wherein the hot water pipe has a horizontally long cross section.

2. A beverage extraction apparatus according to claim 1 , wherein a fixed amount of beverage is extracted by repeating a series of steps consisting of water supply, boiling and boiling a plurality of times.

Water initially squeezing flow to generate steam, the beverage extracting apparatus of claim 1 Symbol mounting, characterized in that preheating the tube in this steam.

The beverage extraction apparatus according to claim 1, wherein after the beverage extraction is completed, superheated steam is passed through a beverage extractor to dry the raw material residue.