JPH04188396A - Coffee extractor - Google Patents

Coffee extractor

Info

Publication number
JPH04188396A
JPH04188396A JP2318869A JP31886990A JPH04188396A JP H04188396 A JPH04188396 A JP H04188396A JP 2318869 A JP2318869 A JP 2318869A JP 31886990 A JP31886990 A JP 31886990A JP H04188396 A JPH04188396 A JP H04188396A
Authority
JP
Japan
Prior art keywords
time
pressure
extraction
way valve
coffee
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
JP2318869A
Other languages
Japanese (ja)
Other versions
JP2725455B2 (en
Inventor
Teruo Koike
小池 輝男
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP2318869A priority Critical patent/JP2725455B2/en
Publication of JPH04188396A publication Critical patent/JPH04188396A/en
Application granted granted Critical
Publication of JP2725455B2 publication Critical patent/JP2725455B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/44Parts or details or accessories of beverage-making apparatus
    • A47J31/52Alarm-clock-controlled mechanisms for coffee- or tea-making apparatus ; Timers for coffee- or tea-making apparatus; Electronic control devices for coffee- or tea-making apparatus
    • A47J31/525Alarm-clock-controlled mechanisms for coffee- or tea-making apparatus ; Timers for coffee- or tea-making apparatus; Electronic control devices for coffee- or tea-making apparatus the electronic control being based on monitoring of specific process parameters
    • A47J31/5251Alarm-clock-controlled mechanisms for coffee- or tea-making apparatus ; Timers for coffee- or tea-making apparatus; Electronic control devices for coffee- or tea-making apparatus the electronic control being based on monitoring of specific process parameters of pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

PURPOSE:To detect the completion of extraction due to a pressure sensor by providing a means to distinguish the temporary reduction of pressure and pressure reduction caused by the completion of extraction. CONSTITUTION:A pressure sensor 15 is provided to detect the pressure of air blown by an air pump 10 changes from increase to decrease and is lowered from a preceding peak value only for a prescribed value and on the other hand, a means 24 is provided to judge whether the pressure reduction is generated within rated time after a two-way valve 14 of an upper air piping 13 is opened or not, and to output a coffee extraction complete signal at the point of time of reducing pressure again when it is generated within the prescribed time or at a certain point of time when it is out of the prescribed time. The pressure reduction generated within the rated time after opening the two-way valve 14 is abandoned by considering it is caused by opening the two--way valve 14, and the second pressure reduction in the state of opening the two-way valve 14 and the first pressure reduction in the state of closing the two-way valve 14 are considered as being caused by the extraction completion. Thus, the extraction completion is detected without fall.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

この発明は、主としてコーヒー自動販売機に用いられる
コーヒー抽出装置に関し、詳しくはコーヒーの抽出完了
を検出する手段の改良に関する。
The present invention relates primarily to a coffee extraction device used in a coffee vending machine, and more particularly to an improvement in means for detecting the completion of coffee extraction.

【従来の技術】[Conventional technology]

いわゆるレギュラーコーヒーを販売するコーヒー自動販
売機では、底部開口をフィルタで閉塞した容器に湯とコ
ーヒー原料とを投入し、これに機械式ピストンやエアで
圧力を加えてフィルタを通してコーヒーを抽出するコー
ヒー抽出装置が用いられている。 このようなコーヒー抽出装置において、湯が原料やフィ
ルタを透過する際の抵抗は原料の種類や粒度、フィルタ
の目詰まり状態などの条件で異なるため、特にエア加圧
方式ではコーヒーの抽出に要する時間(抽出時間)にば
らつきが生じる。したがって、抽出時間を予めタイマに
設定し、その時間の経過を待って抽出完了とする構成で
は、予測される最大抽出時間を前提に余裕のある時間設
定をしなければならない。 しかし、このように抽出時間の設定に余裕を持たせると
、実際の抽出時間がそれよりも短い場合にもその時間が
経過するまで次の工程に移れないため、販売時間が長く
なって自動販売機の販売効率が低下する。 そこで、エア加圧方式のコーヒー抽出装置において、湯
がフィルタを通過し終わると容器内の圧力か象、激に低
下する特性に着目し、この圧力低−トを圧カセンザで検
出して抽出完了伝号を出し、無駄な待ら時間の排除を図
るよ・うにした二ノーヒー抽出装置が提案されている(
特開昭63−12088号、同6317899号公報参
照)。 一方、近時、コーヒーの抽出性能を高めるために、エア
ポンプから容器にエアを送り込むエア配管を下部エア配
管と上部エア配管とに二部し、まず下部エア配管で容器
の下部にエアを送り込んで湯と原料とを攪拌し、その後
、更に」二部エア配管からもエアを送り込んで容器内を
加圧するようにU5たコーヒー抽出装置が開発されてい
る。
In coffee vending machines that sell so-called regular coffee, hot water and coffee ingredients are poured into a container whose bottom opening is closed with a filter, and coffee is extracted by applying pressure with a mechanical piston or air to extract coffee through the filter. equipment is used. In such coffee brewing devices, the resistance when hot water passes through the raw materials and filter varies depending on conditions such as the type and particle size of the raw materials, and how clogged the filter is. (Extraction time) will vary. Therefore, in a configuration in which the extraction time is set in advance on a timer and the extraction is completed after waiting for the elapse of that time, the time must be set with sufficient margin based on the premise of the predicted maximum extraction time. However, if you allow some leeway in the brewing time setting, even if the actual brewing time is shorter than that, you will not be able to move on to the next process until that time has passed, which will lengthen the sales time and prevent automatic sales. Machine sales efficiency decreases. Therefore, we focused on the characteristic that in air pressurized coffee brewing devices, the pressure inside the container drops dramatically once the hot water finishes passing through the filter, and this low pressure point is detected with a pressure sensor to complete the brewing. A two-no-hee extraction device has been proposed that sends a message and eliminates unnecessary waiting time (
(See Japanese Patent Application Laid-open Nos. 12088/1988 and 6317899). On the other hand, recently, in order to improve coffee extraction performance, the air piping that sends air from the air pump to the container is divided into two parts, a lower air piping and an upper air piping, and the lower air piping first sends air to the bottom of the container. A coffee brewing device has been developed that stirs hot water and raw materials and then pressurizes the inside of the container by feeding air from a two-part air pipe.

【発明が解決しようとする課題】[Problem to be solved by the invention]

ところが、エア配管を二部したコーヒー抽出装置におい
ては、上部配管の管路を開いた時点てエアポンプからの
エアの圧力が一時的に低下するため、圧力低下の検出だ
けではこれと抽出完了との区別がつかないという問題か
あり、抽出完了の検出にはタイマが使用されていた。 そこで、この発明は、十述の一時的な圧力の低下と抽出
完了による圧力の低下とを区別する手段を講じて、圧カ
センザによる抽出完了の検出を可能としたコーヒー抽出
装置を提供することを目的とするものである。
However, in a coffee brewing device with two air pipes, the pressure of the air from the air pump drops temporarily when the upper pipe is opened, so detecting the pressure drop alone is not enough to determine whether the brewing is complete or not. Due to the problem of inability to distinguish, a timer was used to detect when extraction was complete. Therefore, it is an object of the present invention to provide a coffee brewing device that makes it possible to detect the completion of extraction using a pressure sensor by means of distinguishing between the temporary pressure drop mentioned above and the pressure drop due to completion of extraction. This is the purpose.

【課題を解決するための手段】[Means to solve the problem]

この発明は、エアポンプで送り込む空気の圧力が」−昇
から下降に転し、直前のピーク値から所定値だけ低下し
たことを検出する手段を設ける一方、前記圧力低下が」
二部エア配管の2方弁が開いてから規定時間以内に生じ
たか否かを判定し、所定時間以内であれば前記圧力低下
が再度生じた時点で、また前記所定時間以外であれはそ
の時点でそれぞれコーヒー抽出完了信号を出す手段を設
けるものである。
The present invention provides a means for detecting that the pressure of the air sent by the air pump changes from an increase to a decrease and decreases by a predetermined value from the previous peak value.
It is determined whether the pressure drop occurs within a specified time after the two-way valve of the two-part air piping opens, and if it is within the specified time, then at the time when the pressure drop occurs again, and if it is outside the specified time, at that point. Means for outputting a coffee extraction completion signal is provided at each step.

【作用】[Effect]

上部エア配管の2方弁が開くことによる圧力低下は2方
弁が開いた直後に生じる。一方、抽出完了による圧力低
下ば2方弁が開いた時の圧力低下の後に2回目として生
しるか、1回目であれば2方弁が開く前にに生しる。し
たがって、2方弁が開いてから規定時間(例えば1秒)
以内に生じた圧力低下は2方弁が開いたことによるもの
として捨て、それ以外の圧力低下、すなわら2方弁が開
状態での2回目の圧力低下、及び2方弁が閉状態での1
回目の圧力低下を抽出完了によるものとすることにより
、圧力低下が2方弁が開いたことによるものか、抽出が
完了したごとによるものかを区別することができる。
The pressure drop caused by the opening of the two-way valve in the upper air pipe occurs immediately after the two-way valve opens. On the other hand, if the pressure decreases due to the completion of extraction, it occurs for the second time after the pressure decrease when the two-way valve opens, or if it is the first time, it occurs before the two-way valve opens. Therefore, the specified time (for example, 1 second) after the two-way valve opens
The pressure drop that occurs within 20 seconds is discarded as being due to the opening of the two-way valve, and the other pressure drops, i.e., the second pressure drop with the two-way valve open and the second pressure drop with the two-way valve closed, are discarded. 1
By determining that the second pressure drop is due to completion of extraction, it is possible to distinguish whether the pressure drop is due to opening of the two-way valve or due to completion of extraction.

【実施例】【Example】

以下、図に基づいてコーヒー自動販売機に使用されるコ
ーヒー抽出装置の実施例について説明する。 まず、第2図はコーヒー抽出装置の外観を示す斜視図で
、1は湯及び原料を投入する容器の主体となるシリンダ
、2は下降及び上昇してシリンダ1の1一部開口を閉塞
、開放するバルブ、3はシリンダ1に湯及び原料を導く
シュータ、4はシュータ3の湯入口、5は同しく原料人
口、6はシリンダ1の底部開口を閉塞するドラム状に巻
かれた紙フィルタ、7は上昇、下降してフィルタ6をシ
リンダ1に押し付け、あるいはこれから引き離すフィル
タブロック、8及び9はフィルタ6をシリンダ1とフィ
ルタブロック7との間を通して送る紙送り装置のローラ
である。 第1図は上記コーヒー抽出装置の全体構成を示すブロッ
ク図である。シリンダ1にはニー7ポンプ10からエア
配管11を通してエアが送り込まれる。エア配管11 
af先端部が下部エア配管12と上部エア配管13とに
二部され、シリンダ1の下部と上部とにそれぞれ接続さ
れている。上部エア配管13の途中には管路を開閉する
2方弁14か挿入されている。また、エアポンプ10か
ら下部゛ 及び上部エア配管12及び13に至る管路の
途中には圧力センサ15が設けられている。この圧力セ
ンサ15はエアポンプ10からシリンダl内に送り込ま
れるエアの圧力を電圧に変換して出力する。 16ばバルブ2及びフィルタブロック7を駆動するブリ
エアモータで、このブリエアモータ16はカム17及び
18を回転させることにより、図示しない伝動部祠を介
してバルブ2及びフィルタブロック7を所定のタイミン
グで一ヒ昇、下降させる。19及び20ばそれぞれカム
17及び18によりON、OFF操作されるフィルタブ
ロックスイッチ及びバルブスイッチで、ブリエアモータ
16の運転制御を行うためのものである。、21ばロー
ラ8を駆動してフィルタ6を送る紙送りモータで、紙送
りスイッチ22で制御される。また、23はフィルタ6
がなくなったことを検知する紙切れスイッチである。 第3図は第1図及び第2図で説明したコーヒー抽出装置
の抽出動作を示す図である。以下、これについて説明す
る。 ステップ1(第3図(A)) ■ 販売信号により、フィルタブしトンク7が上昇して
シリンダ1と密着する。 ■ 湯入口4から湯がシリンダ1に入る。 ■ 湯と同時にミルで粉砕された原料(挽き豆)が原料
人口5から入る。 ステップ2(第3図(B)) ■ エアポンプ10からシリンダ1の下部にエアを送り
込み湯と原料とを攪拌する(エア攪拌という。この時間
が長いとコーヒーが濃くなる)。 ■ 所定時間のエア攪拌の後、バルブ2が下降してシリ
ンダ1内を気密状態にする(プレス攪拌という。エア撹
拌と同様にコーヒーを濃くする効果がある)。この時点
からコーヒー抽出が始まる。 ステップ3(第3図(C)) ■ 2方弁14を開いてシリンダ1の下部と上部にエア
を送り込み、シリンダl内を更に加圧してコーヒー抽出
を促進する。 ■ 圧力センサ15(第1図)の信号によりエアポンプ
10が止まる。 ■ バルブ2が上昇し、フィルタブロック7が下降する
。 、入jニムブ」ユ(第3図(D)) ■ 紙送りモータ21(第1図)が作動してフィルタ6
を送り、フィルタ6上のかすを排除する。 なお、抽出されたコーヒーは図示しないミキシングボー
ルに導かれて砂糖やミルクが加えられ、カップに注入さ
れる。 第4図は」二に述べた動作を実行する電装部品のON、
OFF状態をタイムチャートにして示したものである。 コーヒー自動販売機にコインが投入され購入押ボタンが
押されると、図示しないカップモータとコーヒー豆原料
モータが所定時間ONしくNo、 1 ’+ No、 
3 ) 、同時にブリエアモータ16がONしてフィル
タブロック7をシリンダlに密着させる(No、5)。 このブリエアモータ16ばフィルタブロックスイッチ2
0がON→OFFすることにより停止する(No、7)
。一方、エアポンプ10ば押ボタンONから所定時間(
タイマに設定)後にONする(No、9)。 フィルタブロックスイッチ20のOFFと同時に湯弁が
、またこれ・からやや遅れてミルがそれぞれ所定時間O
NL、湯及び原料をシリンダ1に投入する(No、 2
 、 No、 4 )。その後、フィルタブロックスイ
ッチ20が2回目のON→OF FをしくN。 7)、それに伴ってブリエアモータ16もON→OFF
して(No、5)、バルブ2がシリンダ1に密着するま
で下降する。これにより、シリンダ1ば気密状態になり
コーヒーの抽出が始まるが、湯の投入が終わってからこ
の時点までがエア攪拌となり、それ以降、後述する2方
弁14のONまでがプレス攪拌となる。 所定時間(タイマで設定)のプレス攪拌の後、2方弁1
4がONL、シリンダ1内が更に加圧されるが、やがて
抽出完了信号か出され(No、15)、エアポンプ10
及び2方弁14がOFFする(N。 8、No、9)。シリンダ1がバルブ2で閉塞されてか
らこの時点までが抽出時間となる。その後、所定時間(
タイマで設定、例えばIs)経過するとゾリフ、アモー
タ16がONL、、ハルブスイソヂ】9のOFFと同時
にOFFする(No、 5 、 No、 6 )。 これにより、バルブ2及びフィルタブロック7がそれぞ
れ」二昇及び下降して販売待機状態に戻る。 その間に、フィルタブロックスイッチ2003回l」の
o N−〉OF F (No、 7 )により紙送りス
イッチ22がONL、これにより紙送りモータ21がO
Nしてフィルタ6を送る。紙送りモータ2jは紙送りス
イッチ22のOFFと共にOF Fする(N。 10.11.)。なお、第4図に破線で併記したように
、タイマによる場合は図示の通り余裕を持たせた抽出時
間設定を必要とし無駄な待ら時間か生じる。 第5図は圧力センサ15の入力回路を示すもので、圧力
センサ15からエアの圧力に応じて出力された電圧信号
は1番の端子に入力され、図示回路を介して自動販売機
全体を制御するCPU24に入力される。2番及び3番
の端子は電源端子である。 第6図は圧力センサ15の出力と、この出力に基づいて
CI) U 24から出力される抽出完了イ1)壮との
関係を示す図である。 CPU24はバルブ2によりシリンダ1が閉塞された時
点、すなわち第4図の2回目のブリエアモータ16のO
FFと同時にセンサ出力の読み込みを開始する。そして
、読み込んだ圧力データを前回のデータと比較し、今回
のデータが前回よりも大きければrii1回のデータを
今回のものに占き替えることによりピーク値を記憶する
。その後、圧力が下降に転したら、ピーク値から2回連
続して規定値(例えば0.12 V )以上圧力が低F
した時点を検出し以下の処理を行う。 まず、第6図(A)は抽出完了前に2方弁14を開く一
般の場合で、圧力カーブに2つの山できる。ずなわら、
センサ読み込め開始後2方弁14を開(と1回目の圧力
低下が生しるが、圧力はその後再び上昇し、抽出が完了
した時点で2回目の圧力低下が生しる。そこで、1回目
の圧力低下を抽出完了と区別するために、2方弁14の
開と同時に規定時間(例えば1秒間)のタイマ設定時間
を設り、この間の圧力低下(0,12V以上、連続2回
)のデータはクリアし、1秒間はデータの読み込みをし
ない。1秒後再びセンサ読み込みを開始し、2回目のビ
ークイ直を記憶する。そして、2回目のピーク値から0
.12 V以」二、連続2回の圧力低下が生じたら抽出
完了と判断して抽出完了信号を出す。なお、上記圧力低
下の規定値や規定時間は、2方弁14の開による圧力低
下の判断に必要1゛分な時間を考慮して適正に設定する
ものとする。 これに対して、第6図(B)は二l−ヒーを濃くするた
めにプレス攪拌の設定時間を長くしたため、2方弁14
が開く前に抽出が完了してしまう場合で、圧力カーブの
山は1つである。この場合にはセンサ読み込め開始後の
ピーク値を記憶し、2方弁14の閉の状態でピーク値か
ら0.12 V以−1−1連続2回の圧力低下が生した
ら、抽出完了と判断して直らに抽出完了信号を出す。 以上述べた通り、図示構成によれば、圧力センサ15の
出力電圧(圧力)のピーク値からの規定値の圧力低下が
2方弁14を開いてから規定時間以内に生じたものか否
かを判断することにより、2方弁14の開による圧力低
下を抽出完了によるものと区別することができる。
Hereinafter, an embodiment of a coffee brewing device used in a coffee vending machine will be described based on the drawings. First of all, Fig. 2 is a perspective view showing the appearance of the coffee brewing device, in which 1 is the cylinder that is the main body of the container into which hot water and raw materials are put, and 2 is the cylinder that descends and rises to close and open part of the opening of cylinder 1. 3 is a chute for introducing hot water and raw materials into the cylinder 1; 4 is a hot water inlet of the chute 3; 5 is also a raw material port; 6 is a paper filter wrapped in a drum shape to close the bottom opening of the cylinder 1; 7 8 and 9 are rollers of a paper feeding device that feed the filter 6 between the cylinder 1 and the filter block 7. FIG. 1 is a block diagram showing the overall configuration of the coffee brewing device. Air is fed into the cylinder 1 from a knee 7 pump 10 through an air pipe 11. Air piping 11
The af tip is divided into two parts, a lower air piping 12 and an upper air piping 13, which are connected to the lower and upper parts of the cylinder 1, respectively. A two-way valve 14 is inserted in the middle of the upper air pipe 13 to open and close the pipe. Further, a pressure sensor 15 is provided in the middle of the pipe line from the air pump 10 to the lower and upper air pipes 12 and 13. This pressure sensor 15 converts the pressure of air sent into the cylinder 1 from the air pump 10 into voltage and outputs the voltage. 16 is a Bri-Air motor that drives the valve 2 and the filter block 7. By rotating the cams 17 and 18, the Bri-Air motor 16 aligns the valve 2 and the filter block 7 at a predetermined timing via a transmission part (not shown). Raise and lower. 19 and 20 are a filter block switch and a valve switch which are turned on and off by cams 17 and 18, respectively, and are used to control the operation of the air motor 16. , 21 are paper feed motors that drive the rollers 8 and feed the filter 6, and are controlled by a paper feed switch 22. In addition, 23 is a filter 6
This is a paper-out switch that detects when the paper is out. FIG. 3 is a diagram showing the extraction operation of the coffee extraction device explained in FIGS. 1 and 2. This will be explained below. Step 1 (FIG. 3(A)) ■ In response to the sales signal, the filter tonk 7 rises and comes into close contact with the cylinder 1. ■ Hot water enters cylinder 1 from hot water inlet 4. ■ At the same time as hot water, the raw material (ground beans) ground in a mill enters from raw material population 5. Step 2 (Fig. 3 (B)) - Air is sent from the air pump 10 to the lower part of the cylinder 1 to stir the hot water and raw materials (referred to as air stirring. If this time is long, the coffee will become strong). - After air agitation for a predetermined period of time, the valve 2 is lowered to make the inside of the cylinder 1 airtight (referred to as press agitation. Similar to air agitation, it has the effect of thickening the coffee). Coffee extraction begins at this point. Step 3 (Fig. 3(C)) ■ Open the two-way valve 14 to send air into the lower and upper portions of the cylinder 1 to further pressurize the inside of the cylinder 1 and promote coffee extraction. (2) The air pump 10 is stopped by the signal from the pressure sensor 15 (Fig. 1). - Valve 2 rises and filter block 7 falls. , enter the filter 6 (Fig. 3 (D)) ■ The paper feed motor 21 (Fig. 1) operates and the filter 6
to remove the residue on the filter 6. Note that the extracted coffee is guided to a mixing bowl (not shown), sugar and milk are added thereto, and the coffee is poured into a cup. Figure 4 shows the ON state of the electrical components that perform the operations described in 2.
This is a time chart showing the OFF state. When a coin is inserted into the coffee vending machine and the purchase button is pressed, the cup motor and coffee bean raw material motor (not shown) are turned on for a predetermined period of time.No, 1 '+ No,
3) At the same time, the air motor 16 is turned on to bring the filter block 7 into close contact with the cylinder l (No, 5). This Bri air motor 16 filter block switch 2
Stops when 0 turns from ON to OFF (No, 7)
. On the other hand, the air pump 10 is turned on for a predetermined period of time (
(set in the timer) and then turn it on (No, 9). At the same time as the filter block switch 20 is turned OFF, the hot water valve is turned OFF, and after a certain delay, the mill is turned OFF for a predetermined time.
Inject NL, hot water and raw materials into cylinder 1 (No, 2
, No. 4). After that, the filter block switch 20 is turned on and off for the second time. 7) Accordingly, the Bri air motor 16 also turns from ON to OFF.
(No, 5), and the valve 2 is lowered until it comes into close contact with the cylinder 1. As a result, the cylinder 1 becomes airtight and coffee extraction begins, but air agitation is performed from the time hot water is added until this point, and from then on, press agitation is performed until the two-way valve 14 is turned on, which will be described later. After press stirring for a predetermined time (set by timer), 2-way valve 1
4 is ONL, the inside of cylinder 1 is further pressurized, but eventually an extraction completion signal is issued (No, 15), and air pump 10
And the two-way valve 14 is turned off (N. 8, No. 9). The period from when the cylinder 1 is closed by the valve 2 to this point is the extraction time. After that, for a predetermined period of time (
Set by a timer, for example, Is), when it elapses, the amotor 16 turns off at the same time as ONL, Halbus ISO 9 turns off (No, 5, No, 6). As a result, the valve 2 and filter block 7 rise and fall, respectively, and return to the sales standby state. In the meantime, the filter block switch 2003 times l'o N->OFF (No, 7) turns the paper feed switch 22 ON, and the paper feed motor 21 turns OFF.
N and send filter 6. The paper feed motor 2j is turned off when the paper feed switch 22 is turned off (N. 10.11.). Note that, as indicated by a broken line in FIG. 4, when using a timer, it is necessary to set the extraction time with a margin as shown in the figure, resulting in wasted waiting time. Figure 5 shows the input circuit of the pressure sensor 15. The voltage signal output from the pressure sensor 15 according to the air pressure is input to the No. 1 terminal, and the entire vending machine is controlled via the illustrated circuit. The information is input to the CPU 24 that performs the processing. Terminals 2 and 3 are power supply terminals. FIG. 6 is a diagram showing the relationship between the output of the pressure sensor 15 and the extraction completion time outputted from the CI) U 24 based on this output. When the cylinder 1 is closed by the valve 2, the CPU 24 controls the O
Start reading sensor output at the same time as FF. Then, the read pressure data is compared with the previous data, and if the current data is larger than the previous data, the peak value is stored by replacing the rii1 data with the current data. After that, if the pressure starts to decrease, the pressure will be lower than the specified value (for example, 0.12 V) two times in a row from the peak value.
Detects the point in time and performs the following processing. First, FIG. 6(A) shows a general case in which the two-way valve 14 is opened before the extraction is completed, and two peaks appear in the pressure curve. Zunawara,
After the sensor reading starts, the two-way valve 14 is opened (and the first pressure drop occurs, but the pressure rises again after that, and the second pressure drop occurs when the extraction is completed. In order to distinguish the pressure drop from the completion of extraction, a timer is set for a specified time (for example, 1 second) at the same time as the two-way valve 14 is opened, and the pressure drop (0.12 V or more, twice in a row) during this time is set. Clear the data and do not read data for 1 second. After 1 second, start reading the sensor again and memorize the second beak correction. Then, from the second peak value to 0
.. 12 V or more. 2. When the pressure decreases twice in a row, it is determined that extraction is complete and an extraction completion signal is issued. Note that the prescribed value and prescribed time for the pressure drop are appropriately set in consideration of the 1 minute time required to determine the pressure drop due to the opening of the two-way valve 14. On the other hand, in Fig. 6(B), the setting time of the press stirring was lengthened in order to make the 2L heat more concentrated, so the 2-way valve 14
In this case, the extraction is completed before the pressure curve opens, and the pressure curve has one peak. In this case, the peak value after sensor reading starts is memorized, and when the pressure decreases by 0.12 V or more from the peak value twice in a row with the two-way valve 14 closed, extraction is judged to be complete. Immediately sends an extraction completion signal. As described above, according to the illustrated configuration, it is possible to determine whether a pressure drop of a specified value from the peak value of the output voltage (pressure) of the pressure sensor 15 occurs within a specified time after the two-way valve 14 is opened. By making this determination, it is possible to distinguish the pressure drop due to opening of the two-way valve 14 from that due to completion of extraction.

【発明の効果】【Effect of the invention】

この発明によれば、エア配管を二部して湯とコーヒーと
を攪拌するコーヒー抽出装置においてもエアの圧力変化
から抽出完了処理を行うことができ、原料の種類や豆の
挽き具合による抽出時間のばらつきに関係なく迅速にコ
ーヒー抽出を完了することが可能となる。
According to this invention, even in a coffee extraction device that uses two air pipes to stir hot water and coffee, the extraction process can be completed based on changes in air pressure, and the extraction time depends on the type of raw materials and the grinding condition of the beans. It becomes possible to quickly complete coffee extraction regardless of variations in coffee.

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

図はこの発明の実施例を示すもので、第1図はコーヒー
抽出装置の全体構成を示すブロック図、第2図は第1図
の装置の外観を示す斜視図、第3図(A)〜(D)は第
1図の装置のコーヒー抽出動作を示す図、第4図はコー
ヒー自動販売機における販売タイムチャート、第5図は
第1図の圧力センサの入力回路図、第6図(A)及び(
B)は共に第2図の圧力センサの出力電圧のカーブを示
す線図である。 ■・・・シリンダ、2・・・バルブ、4・・・浸入口、
5・・・原料入口、6・・・フィルタ、7・・・フィル
タブロック、10・・・エアポンプ、11・・・エア配
管、12・・・下部エア配管、13・・・上部エア配管
、14・・・2方弁、15・・・圧力センサ、24・・
・CPU0(A) 第3” (B) 図
The figures show an embodiment of the present invention, in which Fig. 1 is a block diagram showing the overall configuration of a coffee brewing device, Fig. 2 is a perspective view showing the external appearance of the device in Fig. 1, and Figs. (D) is a diagram showing the coffee extraction operation of the device in Figure 1, Figure 4 is a sales time chart in a coffee vending machine, Figure 5 is an input circuit diagram of the pressure sensor in Figure 1, and Figure 6 (A )as well as(
B) is a diagram showing the output voltage curve of the pressure sensor of FIG. 2; ■...Cylinder, 2...Valve, 4...Inlet,
5... Raw material inlet, 6... Filter, 7... Filter block, 10... Air pump, 11... Air piping, 12... Lower air piping, 13... Upper air piping, 14 ...2-way valve, 15...Pressure sensor, 24...
・CPU0 (A) 3rd” (B) Figure

Claims (1)

【特許請求の範囲】[Claims] 1)底部開口をフィルタで閉塞した容器に湯とコーヒー
原料とを投入し、次いでエアポンプにより下部エア配管
とこれから2方弁を介して分岐する上部エア配管とから
なるエア配管から前記容器の上部と下部とにエアを送り
込み、前記の湯と原料とを攪拌しながら前記容器内を加
圧して前記フィルタを通してコーヒーを抽出するコーヒ
ー抽出装置において、エアポンプで送り込む空気の圧力
が上昇から下降に転じてピーク値から規定値だけ低下し
たことを検出する手段と、前記圧力低下が前記2方弁が
開いてから規定時間以内に生じたか否かを判定し、所定
時間以内であれば前記圧力低下が再度生じた時点で、ま
た前記規定時間以外であればその時点でそれぞれコーヒ
ー抽出完了信号を出す手段とを設けたことを特徴とする
コーヒー抽出装置。
1) Hot water and coffee ingredients are poured into a container whose bottom opening is closed with a filter, and then an air pump is used to connect the upper part of the container to the air pipe, which consists of a lower air pipe and an upper air pipe that branches from the lower air pipe via a two-way valve. In a coffee brewing device that pumps air into the lower part and pressurizes the inside of the container while stirring the hot water and raw materials to extract coffee through the filter, the pressure of the air sent by the air pump changes from rising to falling and peaks. means for detecting that the pressure has decreased by a predetermined value, and determining whether the pressure drop has occurred within a predetermined time after the two-way valve is opened, and if within the predetermined time, the pressure drop has occurred again. and a means for outputting a coffee extraction completion signal at a time when the coffee extraction is completed, or at a time other than the specified time.
JP2318869A 1990-11-22 1990-11-22 Coffee brewing equipment Expired - Fee Related JP2725455B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2318869A JP2725455B2 (en) 1990-11-22 1990-11-22 Coffee brewing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2318869A JP2725455B2 (en) 1990-11-22 1990-11-22 Coffee brewing equipment

Publications (2)

Publication Number Publication Date
JPH04188396A true JPH04188396A (en) 1992-07-06
JP2725455B2 JP2725455B2 (en) 1998-03-11

Family

ID=18103875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2318869A Expired - Fee Related JP2725455B2 (en) 1990-11-22 1990-11-22 Coffee brewing equipment

Country Status (1)

Country Link
JP (1) JP2725455B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010385A1 (en) 1998-12-15 2000-06-21 Sanyo Electric Co. Ltd Beverage extraction apparatus
WO2000042891A1 (en) * 1999-01-19 2000-07-27 Keurig, Inc. Automated beverage brewing system
US6272973B1 (en) 1998-12-15 2001-08-14 Sanyo Electric Co., Ltd. Beverage extraction apparatus
JP2016049257A (en) * 2014-08-29 2016-04-11 サンデンホールディングス株式会社 Beverage feeder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010385A1 (en) 1998-12-15 2000-06-21 Sanyo Electric Co. Ltd Beverage extraction apparatus
US6079317A (en) * 1998-12-15 2000-06-27 Sanyo Electric Co., Ltd. Beverage extraction apparatus
US6272973B1 (en) 1998-12-15 2001-08-14 Sanyo Electric Co., Ltd. Beverage extraction apparatus
US6279461B1 (en) 1998-12-15 2001-08-28 Sanyo Electric Co., Ltd. Beverage extraction apparatus
WO2000042891A1 (en) * 1999-01-19 2000-07-27 Keurig, Inc. Automated beverage brewing system
JP2016049257A (en) * 2014-08-29 2016-04-11 サンデンホールディングス株式会社 Beverage feeder
US10105003B2 (en) 2014-08-29 2018-10-23 Sanden Holdings Corporation Beverage dispenser

Also Published As

Publication number Publication date
JP2725455B2 (en) 1998-03-11

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