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JP4362985B2 - Vending machine controller - Google Patents

Vending machine controller Download PDF

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Publication number
JP4362985B2
JP4362985B2 JP2001087687A JP2001087687A JP4362985B2 JP 4362985 B2 JP4362985 B2 JP 4362985B2 JP 2001087687 A JP2001087687 A JP 2001087687A JP 2001087687 A JP2001087687 A JP 2001087687A JP 4362985 B2 JP4362985 B2 JP 4362985B2
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JP
Japan
Prior art keywords
vending machine
heat exchanger
temperature
internal heat
internal
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.)
Expired - Fee Related
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JP2001087687A
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Japanese (ja)
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JP2002288727A (en
Inventor
晃 菅原
恭一 高埜
保夫 高瀬
浩之 梅沢
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 Retail Systems Co Ltd
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Fuji Electric Retail Systems Co Ltd
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Publication date
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Priority to JP2001087687A priority Critical patent/JP4362985B2/en
Publication of JP2002288727A publication Critical patent/JP2002288727A/en
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Publication of JP4362985B2 publication Critical patent/JP4362985B2/en
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  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、缶飲料などの商品を冷却又は加温して販売する自動販売機の冷却制御を行う自動販売機制御装置に関するものである。
【0002】
【従来の技術】
図8は、自動販売機の内部構造図である。図8において、1は圧縮機、2は外部熱交換器、3〜5は内部熱交換器、11〜14はファン、27は電気ヒータ、28は漏電遮断器、29は商品ラック、30は搬出シュート、31は断熱区画壁、32は外断熱壁、33は前面扉、34は商品取出口である。
【0003】
外断熱壁32と断熱性の前面扉33で囲まれた庫内は、断熱区画壁31,31によって3個の庫室A,B,Cに区画されており、それぞれの庫室A,B,Cを個別に冷却したり加温したりして冷たい飲料と温かい飲料の両方を販売していた。そして、冷却用庫室は、圧縮機1,外部熱交換器2,内部熱交換器3〜5等よりなる周知の冷凍サイクルによって冷却し、加温用庫室は電気ヒータ27によって加温するようにしていた。
【0004】
そのような、従来の自動販売機では、冷却用庫室を冷却する冷凍サイクルで発生した排熱は、外部熱交換器2を介して外部に放出させる一方、加温用庫室の加温手段としては、電気ヒータ27を使用しており、効率が良くなかった。そこで、本出願人は、特願平11-255466号として、ヒートポンプ式の冷却・加温装置を採用した自動販売機を提案した。
【0005】
図1は、ヒートポンプ式の冷却・加温装置を採用した自動販売機の冷媒回路図である。符号は、図8のものに対応しており、6〜9は電動膨張弁、10は気液分離器、15A〜17Bは電磁弁、18A〜20Aは各庫室A〜Cの庫内温度を検知するための温度センサ、18B〜20Bは各内部熱交換器3〜5の温度を検知するための温度センサである。電磁弁15A〜17Bを切り換えることにより、内部熱交換器3〜5を蒸発器として使ってそれが設けられた庫室内を冷却したり、凝縮器として使って、その排熱を利用して庫室内を加温したりする。その結果、従来は外部に捨てていた冷凍サイクルの排熱を有効活用できて、自動販売機の電力消費を大幅に低減させることができる。
【0006】
この自動販売機の圧縮機1は、インバータ電源により駆動され、電源周波数に応じた回転数で運転される。そして、冷却用庫室の庫内温度の制御は、電動膨張弁7〜9の開度調整と、圧縮機1の電源周波数を段階的に変化させることにより行うようにした。すなわち、庫内温度が設定範囲より高くなったらインバータ電源の周波数を1段階高くして圧縮機1の能力を上げ、庫内温度が設定範囲より低くなったらインバータ電源の周波数を1段階低くして圧縮機1の能力を下げる。また、庫内温度が設定範囲より高くなった庫室では、電動膨張弁の開度を小さくし、庫内温度が設定範囲より低くなった庫室では、電動膨張弁の開度を大きくする。
【0007】
また、起動時は、まず各庫室のファン12〜14を起動した後、圧縮機を起動し、各庫室の冷却あるいは加温を開始することになる。そして、圧縮機をフル運転させながら、加温用庫室では、設定温度に達するまでファンを回転させ、設定温度に達したら、圧縮機の電源周波数を調整したり、ファンの回転数を調整したりして、庫内温度が設定範囲内に維持されるように制御する。
【0008】
本出願人が提案したヒートポンプ式の冷却・加温装置を採用した自動販売機では、そのようにして庫室の庫内温度が設定範囲に入るようにした。
【0009】
【発明が解決しようとする課題】
しかしながら、加温用庫室において、起動後、内部熱交換器の温度がなかなか上昇せず、庫内温度が設定温度まで上昇するのに長時間かかるという問題点があった。
【0010】
本発明は、そのような問題点を解決すること、すなわち、自動販売機の起動時に、加温用庫内の温度が設定温度まで上昇する時間を短縮することを目的とするものである。
【0011】
【課題を解決するための手段】
前記課題を解決するため、請求項1に記載の自動販売機制御装置は、断熱性の壁で区画された複数の庫室を有し、各庫室にはそれぞれ電動膨張弁付きの内部熱交換器及びファンが設けられ、それらの電動膨張弁と内部熱交換器は、庫室外に設けられた圧縮機と外部熱交換器に接続され、電磁弁で冷媒の流れ方向を切り換えることにより前記それぞれの内部熱交換器を蒸発器として作用させて庫室内を冷却したり、凝縮器として作用させて庫室内を加温したりできるようにした自動販売機を制御する自動販売機制御装置であって、一部の庫室を加温し、残りの庫室を冷却する際の自動販売機起動時に、起動後加温用庫室の庫内温度が所定の温度以上に上昇するまで、冷却用庫室の電動膨張弁の開度を、その後の定常運転における設定開度より広くすることを特徴とする。このようにすると、自動販売機の起動時に、加温用庫内の温度が設定温度まで上昇する時間を短縮することができる。
【0012】
また、請求項2に記載の自動販売機制御装置は、圧縮機を起動させた後、定常速度より高い所定速度に達するまで徐々に加速し、その後、加温用庫室の庫内温度が設定値に達したとき定常速度にすることを特徴とする。このようにすると、圧縮機の損傷を防止しながら、自動販売機の起動時に、加温用庫内の温度が設定温度まで上昇する時間をさらに短縮することができる。
【0013】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて詳細に説明する。冷媒回路は、図1のものを用いる。そして、図2は、本発明の自動販売機制御装置の制御ブロック図である。符号は、図1のものに対応している。主制御部21は、販売制御部22,入力制御部23,接客制御部24,硬貨処理制御部25等の自動販売機各部を個別に制御する端末制御部を統括して制御する。
【0014】
販売制御部22は、自動販売機内の各庫室の冷却,加温を制御したり、商品搬出装置26を制御したりする。入力制御部23は、リモコン式の入力装置と主制御部21との間のデータ入出力を制御する。接客制御部24は、自動販売機前面に設けられた商品選択ボタン(図示せず)の動作監視や、売切表示ランプ,投入金額表示器等の表示制御などを行う。硬貨処理制御部25は、硬貨投入口から投入された硬貨の識別やつり銭の払出し等を行う。各制御部は、マイコンによって構成される。
【0015】
販売制御部22には、各庫室の冷却,加温を制御するため、前述の圧縮機1,電動膨張弁6〜9,ファン11〜14,電磁弁15A〜17B,温度センサ18〜20が接続されている。
【0016】
ここで、まず、図1及び図2に基づいて冷媒回路の動作を説明する。図1は、庫室A,Bを冷却し、庫室Cだけを加温する場合を示している。この運転モードを、冷却Coolの「C」と加温Hotの「H」をとり、庫室A,Bを冷却し、庫室Cだけを加温するという意味で、「CCH運転」と表示することとする。また、この実施形態の自動販売機では、各熱交換器の容量は、内部熱交換器4の容量を1としたとき、内部熱交換器5の容量が2、内部熱交換器3の容量が3、そして、外部熱交換器2の容量が6となるように設計されているものとする。
【0017】
販売制御部22は、外部熱交換器2の電磁弁15Aを開き、他方の電磁弁15Bを閉じる。また、内部熱交換器4,5の電磁弁16A,17Bを閉じ、他方の電磁弁16B,17Aを開く。そしてまた、外部熱交換器2の電動膨張弁6と内部熱交換器5の電動膨張弁9は全開とし、内部熱交換器3,4の電動膨張弁7,8は、各庫室A,Bの温度に応じて開度が調整される。
【0018】
その状態で、圧縮機1から吐出された冷媒は、電磁弁15Aと電磁弁17Aに分流され、外部熱交換器2と内部熱交換器5へと流れ、それらで凝縮液化された後、電動膨張弁7,8に分配されてそこで減圧されてから内部熱交換器3,4に流入する。内部熱交換器3,4に流入した冷媒は、内部熱交換器3,4内部で気化した後、気液分離器10を経て圧縮機1に戻る。
【0019】
このようにして、図1のものでは、外部熱交換器2と内部熱交換器5は凝縮器として作用し、内部熱交換器3,4は、蒸発器として作用する。その結果、二つの庫室A,Bは冷却され、残りの庫室Cは加温される。その際、内部熱交換器3の容量が3、内部熱交換器4の容量が1であり、内部熱交換器5の容量が2であるので、外部熱交換器2の必要容量は2となる。そこで、販売制御部22は、外部熱交換器2のファン11の回転数を下げて、冷媒圧力がアンバランスにならないように調整する。
【0020】
次に、庫室Aだけを冷却し、庫室B,Cを加温する場合、すなわち、CHH運転の場合を説明する。図3は、CHH運転時の冷媒回路図である。販売制御部22は、外部熱交換器2の電磁弁15A,15Bは両方とも閉じる。また、内部熱交換器4,5の電磁弁16A,17Aを開き、他方の電磁弁16B,17Bを閉じる。そしてまた、外部熱交換器2の電動膨張弁6と内部熱交換器4,5の電動膨張弁8,9は全開とし、内部熱交換器3の電動膨張弁7は、庫室Aの温度に応じて開度が調整される。
【0021】
その状態で、圧縮機1から吐出された冷媒は、電磁弁16Aと電磁弁17Aに分流され、内部熱交換器4,5へと流れ、それらで凝縮液化された後、電動膨張弁7に流入する。そこで減圧されてから内部熱交換器3に流入する。内部熱交換器3に流入した冷媒は、内部熱交換器3内部で気化した後、気液分離器10を経て圧縮機1に戻る。
【0022】
このようにして、図3のものでは、内部熱交換器4,5は凝縮器として作用し、内部熱交換器3は、蒸発器として作用する。その結果、庫室Aは冷却され、残りの二つの庫室B,Cは加温される。その際、内部熱交換器3の容量が3、内部熱交換器4の容量が1であり、内部熱交換器5の容量が2であるので、それらだけでバランスし、外部熱交換器2は不要となる。
【0023】
次に、庫室A,Cを冷却し、庫室Bだけを加温する場合、すなわち、CHC運転の場合を説明する。図4は、CHC運転時の冷媒回路図である。販売制御部22は、外部熱交換器2の電磁弁15Aを開き、他方の電磁弁15Bを閉じる。また、内部熱交換器4,5の電磁弁16A,17Bを開き、他方の電磁弁16B,17Aを閉じる。そしてまた、外部熱交換器2の電動膨張弁6と内部熱交換器5の電動膨張弁8は全開とし、内部熱交換器3,5の電動膨張弁7,9は、庫室A,Cの温度に応じて開度が調整される。
【0024】
その状態で、圧縮機1から吐出された冷媒は、電磁弁15Aと電磁弁16Aに分流され、外部熱交換器2と内部熱交換器4へと流れ、それらで凝縮液化された後、電動膨張弁7,9に分配される。そこで減圧されてから内部熱交換器3,5に流入する。内部熱交換器3,5に流入した冷媒は、内部熱交換器3,5内部で気化した後、気液分離器10を経て圧縮機1に戻る。
【0025】
このようにして、図4のものでは、外部熱交換器2と内部熱交換器4は凝縮器として作用し、内部熱交換器3,5は、蒸発器として作用する。その結果、二つの庫室A,Cは冷却され、残りの庫室Bは加温される。その際、内部熱交換器3の容量が3、内部熱交換器5の容量が2であり、内部熱交換器4の容量が1である。そこで、販売制御部22は、外部熱交換器2のファン11の回転数を下げて、冷媒圧力がアンバランスにならないように調整する。
【0026】
次に、三つの庫室A,B,Cを共に冷却する場合、すなわち、CCC運転の場合を説明する。図5は、CCC運転時の冷媒回路図である。販売制御部22は、外部熱交換器2の電磁弁15Aを開き、他方の電磁弁15Bを閉じる。また、内部熱交換器4,5の電磁弁16A,17Aを閉じ、他方の電磁弁16B,17Bを開く。そしてまた、外部熱交換器2の電動膨張弁6は全開とし、内部熱交換器3〜5の電動膨張弁7〜9は、各庫室の温度に応じて開度が調整される。
【0027】
その状態で、圧縮機1から吐出された冷媒は、電磁弁15Aから外部熱交換器2へと流れ、凝縮液化された後、電動膨張弁7〜9に分配されてそこで減圧されてから内部熱交換器3〜5に流入する。内部熱交換器3〜5に流入した冷媒は、内部熱交換器3〜5内部で気化した後、気液分離器10を経て圧縮機1に戻る。
【0028】
このようにして、図5のものでは、外部熱交換器2は凝縮器として作用し、内部熱交換器3〜5は、蒸発器として作用する。その結果、三つの庫室A,B,Cは、全てが冷却される。
【0029】
以上の運転モードの内、本発明は、図1,図3,図4に示す例のように、いずれか一つあるいは二つの庫室の内部熱交換器を凝縮器として作用させて、その庫室を加温し、その他の庫室を冷却する場合に適用するものである。そのように、一部の庫室を加温し、残りの庫室を冷却するように冷媒回路を設定したのち、自動販売機を起動する際、本発明の自動販売機制御装置では、冷却用庫室の電動膨張弁の開度を、定常時の設定開度より広くする。すなわち、本来なら冷却用庫室の庫内温度は、5℃にするように電動膨張弁の開度を設定すべきところを、起動後加温用庫室の庫内温度が所定の温度以上に上昇するまでは、冷却用庫室の庫内温度が7℃程度になるように電動膨張弁の開度を設定する。
【0030】
そのように電動膨張弁の開度を広くすると、絞り作用(減圧作用)が減って、内部熱交換器での蒸発温度が上昇する。そして、蒸発温度が上がると、凝縮器として作用する内部熱交換器の凝縮温度も上がる。また、電動膨張弁の開度を広くすることで熱交換器への冷媒循環量も増えるので、熱交換作用が増進し、凝縮器として作用する内部熱交換器の凝縮温度が所定温度に到達するまでの時間が短縮される。
【0031】
すなわち、冷却用庫室の庫内温度を通常通り5℃に設定し、時点t0で圧縮機1を起動すると、庫内温度は、図6に点線ニで示すように低下していく。一方、加温用庫室の庫内温度は、図6に点線ロで示すように、緩やかに上昇していき、時点t2で設定温度TSに達する。
【0032】
それに対して、冷却用庫室の庫内温度を通常よりやや高い温度である7℃に設定すると、冷却用庫室の電動膨張弁の開度が通常より広くなり、庫内温度は、図6に実線ハで示すように点線ニより緩やかに低下していく。一方、加温用庫室の庫内温度は、図6に実線イで示すように点線ロより早く上昇していき、時点t2よりΔtだけ早い時点t1で設定温度TSに達する。その時点t0から時点t1までの期間をプルアップ期間といい、その長さは、8〜12時間程度要する。そして、その後は、定常状態の加温運転に入る。
【0033】
このように、冷却用庫室の庫内温度を通常よりやや高い温度に設定すると、冷却用庫室の電動膨張弁の開度が広くなって冷却用庫室の庫内温度の冷却速度が遅くなる。しかしながら、自動販売機内部の庫室を加温用に用いるときは、冬季等、外気温度が低い場合が多いので、冷却用庫室の温度低下が遅くなることより、それより、加温用庫室の温度上昇が早くなる方が売上によい結果を与える。そのような観点から、本発明の自動販売機制御装置では、自動販売機起動時に、冷却用庫室の設定温度を高めにして、電動膨張弁の開度を定常時の設定開度より広くすることにした。次に、フローチャートを使ってプルアップの制御手順について説明する。
【0034】
図7は、本発明の自動販売機制御装置のプルアップ制御手順を示すフローチャートである。
ステップ1…冷却用庫室の庫内温度の設定温度を、通常よりやや高めの7℃にする。
ステップ2…圧縮機に負担をかけないように、圧縮機を低速(例えば、電源周波数50Hz)で起動し、定常速度より高い所定速度(例えば、電源周波数80Hz)まで徐々に加速していく(例えば、電源周波数を5Hz/5minずつ上げていく)。なお、圧縮機はインバータにより駆動され,電源周波数に応じた回転数で運転される。
【0035】
ステップ3…加温用庫室に設けられている温度センサから加温用庫室の次販商品の温度TCを取得する。
ステップ4…次販商品の温度TCが設定温度、例えば、60℃に達したか否かを判別する。
【0036】
ステップ5…設定温度に達したら、冷却用庫室の庫内温度の設定温度を、通常の5℃にする。
ステップ6…圧縮機の運転速度を定常速度(例えば、電源周波数50Hz)まで低減させて、定常運転に入る。
【0037】
【発明の効果】
本発明は、以上説明したように構成されているので、次に記載するような効果を奏する。
すなわち、請求項1に記載の自動販売機制御装置は、請求項1に記載の自動販売機制御装置は、一部の庫室を加温し、残りの庫室を冷却する際の自動販売機起動時に、起動後加温用庫室の庫内温度が所定の温度以上に上昇するまで、冷却用庫室の電動膨張弁の開度を、その後の定常運転における設定開度より広くするようにしたので、自動販売機の起動時に、加温用庫内の温度が設定温度まで上昇する時間を短縮することができる。
【0038】
また、請求項2に記載の自動販売機制御装置は、圧縮機を起動させた後、定常速度より高い所定速度に達するまで徐々に加速し、その後、加温用庫室の庫内温度が設定値に達したとき定常速度にするようにしたので、圧縮機の損傷を防止しながら、自動販売機の起動時に、加温用庫内の温度が設定温度まで上昇する時間をさらに短縮することができる。
【図面の簡単な説明】
【図1】本発明を適用する自動販売機の冷媒回路図である。
【図2】本発明の自動販売機制御装置の制御ブロック図である。
【図3】CHH運転時の冷媒回路図である。
【図4】CHC運転時の冷媒回路図である。
【図5】CCC運転時の冷媒回路図である。
【図6】プルアップ時の庫内温度の変化図である。
【図7】本発明の自動販売機制御装置のプルアップ制御手順を示すフローチャートである。
【図8】自動販売機の内部構造図である。
【符号の説明】
1…圧縮機
2…外部熱交換器
3〜5…内部熱交換器
6〜9…電動膨張弁
11〜14…ファン
15A〜17B…電磁弁
18A〜20B…温度センサ
27…電気ヒータ
28…漏電遮断器
29…商品ラック
30…搬出シュート
31…断熱区画壁
32…外断熱壁
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vending machine control apparatus that performs cooling control of a vending machine that sells products such as canned beverages after cooling or heating.
[0002]
[Prior art]
FIG. 8 is an internal structure diagram of the vending machine. In FIG. 8, 1 is a compressor, 2 is an external heat exchanger, 3 to 5 are internal heat exchangers, 11 to 14 are fans, 27 is an electric heater, 28 is a leakage breaker, 29 is a product rack, and 30 is unloading. A chute, 31 is a heat insulating partition wall, 32 is an outer heat insulating wall, 33 is a front door, and 34 is a commodity outlet.
[0003]
The interior surrounded by the outer heat insulating wall 32 and the heat insulating front door 33 is partitioned into three storage rooms A, B, and C by the heat insulating partition walls 31 and 31, respectively. C was individually cooled and heated to sell both cold and hot beverages. The cooling chamber is cooled by a well-known refrigeration cycle including the compressor 1, the external heat exchanger 2, the internal heat exchangers 3 to 5 and the like, and the heating chamber is heated by the electric heater 27. I was doing.
[0004]
In such a conventional vending machine, the exhaust heat generated in the refrigeration cycle for cooling the cooling chamber is released to the outside via the external heat exchanger 2, while the heating means for the heating chamber is heated. As an example, the electric heater 27 was used, and the efficiency was not good. Therefore, the present applicant has proposed a vending machine employing a heat pump type cooling / heating device as Japanese Patent Application No. 11-255466.
[0005]
FIG. 1 is a refrigerant circuit diagram of a vending machine employing a heat pump type cooling / heating device. The reference numerals correspond to those in FIG. 8, 6 to 9 are electric expansion valves, 10 is a gas-liquid separator, 15A to 17B are electromagnetic valves, and 18A to 20A are the chamber temperatures of the chambers A to C. Temperature sensors 18B to 20B for detecting are temperature sensors for detecting the temperatures of the internal heat exchangers 3 to 5. By switching the solenoid valves 15A to 17B, the internal heat exchangers 3 to 5 are used as an evaporator to cool the internal compartment provided with the internal heat exchangers 3 to 5, or the condenser is used as a condenser to utilize the exhaust heat. Or warm up. As a result, the exhaust heat of the refrigeration cycle that has been thrown away to the outside can be effectively used, and the power consumption of the vending machine can be greatly reduced.
[0006]
The compressor 1 of this vending machine is driven by an inverter power source and is operated at a rotational speed corresponding to the power frequency. And control of the chamber internal temperature of a cooling chamber was performed by changing the opening degree of the electric expansion valves 7-9 and changing the power supply frequency of the compressor 1 in steps. That is, when the internal temperature becomes higher than the set range, the frequency of the inverter power supply is increased by one step to increase the capacity of the compressor 1, and when the internal temperature becomes lower than the set range, the frequency of the inverter power supply is decreased by one step. Reduce the capacity of the compressor 1. Further, the opening degree of the electric expansion valve is reduced in the storage room where the internal temperature is higher than the set range, and the opening degree of the electric expansion valve is increased in the storage room where the internal temperature is lower than the setting range.
[0007]
Further, at the time of activation, first, the fans 12 to 14 in each warehouse are activated, and then the compressor is activated to start cooling or heating each warehouse. Then, while the compressor is running at full capacity, in the heating cabinet, the fan is rotated until the set temperature is reached, and when the set temperature is reached, the power frequency of the compressor is adjusted and the fan speed is adjusted. Then, control is performed so that the internal temperature is maintained within the set range.
[0008]
In the vending machine adopting the heat pump type cooling / heating device proposed by the present applicant, the internal temperature of the storage room is thus set within the set range.
[0009]
[Problems to be solved by the invention]
However, in the heating chamber, there is a problem that the temperature of the internal heat exchanger does not rise easily after startup, and it takes a long time for the temperature in the chamber to rise to the set temperature.
[0010]
An object of the present invention is to solve such a problem, that is, to shorten the time during which the temperature in the heating cabinet rises to a set temperature when the vending machine is started.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problem, the vending machine control device according to claim 1 has a plurality of storage rooms partitioned by a heat insulating wall, and each storage room has an internal heat exchange with an electric expansion valve. And an electric expansion valve and an internal heat exchanger are connected to a compressor and an external heat exchanger provided outside the storage room, and the respective flow directions of the refrigerant are switched by an electromagnetic valve. A vending machine control device that controls a vending machine that allows an internal heat exchanger to act as an evaporator to cool the interior of a warehouse or to act as a condenser to heat the interior of a warehouse, When the vending machine is started when some of the storage rooms are heated and the remaining storage rooms are cooled , the cooling storage room is kept until the internal temperature of the heating storage room rises above the specified temperature after startup. of the opening degree of the electric expansion valve, the breadth than the set opening degree in the subsequent steady operation Characterized in that it. In this way, at the start of the automatic vending machine, the temperature in the warming compartment chamber it is possible to shorten the time to rise to a set temperature.
[0012]
The automatic vending machine controller according to claim 2, after the compressor is started, gradually accelerated to reach a higher than normal rate a predetermined speed, then the inside temperature of the warming compartment chamber It is characterized by a steady speed when the set value is reached. Thus, while preventing damage to the compressor, at the start of the automatic vending machine, the time the temperature in the warming compartment chamber rises to a set temperature can be further reduced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The refrigerant circuit shown in FIG. 1 is used. FIG. 2 is a control block diagram of the vending machine control apparatus of the present invention. The reference numerals correspond to those in FIG. The main control unit 21 controls a terminal control unit that individually controls each part of the vending machine such as the sales control unit 22, the input control unit 23, the customer service control unit 24, and the coin processing control unit 25.
[0014]
The sales control unit 22 controls the cooling and heating of each storage room in the vending machine, and controls the product carry-out device 26. The input control unit 23 controls data input / output between the remote control type input device and the main control unit 21. The customer service control unit 24 performs operation monitoring of a product selection button (not shown) provided on the front surface of the vending machine, display control of a sold-out display lamp, an input amount indicator, and the like. The coin processing control unit 25 performs identification of coins inserted from the coin insertion slot, payout of change, and the like. Each control unit is configured by a microcomputer.
[0015]
The sales control unit 22 includes the compressor 1, the electric expansion valves 6 to 9, the fans 11 to 14, the electromagnetic valves 15A to 17B, and the temperature sensors 18 to 20 for controlling the cooling and heating of each chamber. It is connected.
[0016]
Here, first, the operation of the refrigerant circuit will be described based on FIG. 1 and FIG. FIG. 1 shows a case where the storage rooms A and B are cooled and only the storage room C is heated. This operation mode is displayed as “CCH operation” in the sense that “C” of cooling Cool and “H” of heating hot are taken, the storage rooms A and B are cooled, and only the storage room C is heated. I will do it. In the vending machine of this embodiment, the capacity of each heat exchanger is 2 when the capacity of the internal heat exchanger 4 is 1, and the capacity of the internal heat exchanger 5 is 2 and the capacity of the internal heat exchanger 3 is 3 and the external heat exchanger 2 is designed to have a capacity of 6.
[0017]
The sales control unit 22 opens the electromagnetic valve 15A of the external heat exchanger 2 and closes the other electromagnetic valve 15B. Further, the electromagnetic valves 16A and 17B of the internal heat exchangers 4 and 5 are closed, and the other electromagnetic valves 16B and 17A are opened. The electric expansion valve 6 of the external heat exchanger 2 and the electric expansion valve 9 of the internal heat exchanger 5 are fully opened, and the electric expansion valves 7 and 8 of the internal heat exchangers 3 and 4 are respectively connected to the compartments A and B. The opening degree is adjusted in accordance with the temperature.
[0018]
In this state, the refrigerant discharged from the compressor 1 is divided into the electromagnetic valve 15A and the electromagnetic valve 17A, flows to the external heat exchanger 2 and the internal heat exchanger 5, and is condensed and liquefied by them, and then is electrically expanded. After being distributed to the valves 7 and 8 and depressurized there, it flows into the internal heat exchangers 3 and 4. The refrigerant flowing into the internal heat exchangers 3 and 4 is vaporized inside the internal heat exchangers 3 and 4 and then returns to the compressor 1 through the gas-liquid separator 10.
[0019]
Thus, in the thing of FIG. 1, the external heat exchanger 2 and the internal heat exchanger 5 act as a condenser, and the internal heat exchangers 3 and 4 act as an evaporator. As a result, the two storage rooms A and B are cooled, and the remaining storage room C is heated. At that time, the capacity of the internal heat exchanger 3 is 3, the capacity of the internal heat exchanger 4 is 1, and the capacity of the internal heat exchanger 5 is 2, so that the required capacity of the external heat exchanger 2 is 2. . Therefore, the sales control unit 22 adjusts the refrigerant pressure so that the refrigerant pressure does not become unbalanced by lowering the rotational speed of the fan 11 of the external heat exchanger 2.
[0020]
Next, the case where only the storage room A is cooled and the storage rooms B and C are heated, that is, the case of CHH operation will be described. FIG. 3 is a refrigerant circuit diagram during CHH operation. Sales controller 22 closes both solenoid valves 15A and 15B of external heat exchanger 2. Further, the electromagnetic valves 16A and 17A of the internal heat exchangers 4 and 5 are opened, and the other electromagnetic valves 16B and 17B are closed. Moreover, the electric expansion valve 6 of the external heat exchanger 2 and the electric expansion valves 8 and 9 of the internal heat exchangers 4 and 5 are fully opened, and the electric expansion valve 7 of the internal heat exchanger 3 is set to the temperature of the storage room A. The opening is adjusted accordingly.
[0021]
In this state, the refrigerant discharged from the compressor 1 is divided into the electromagnetic valve 16A and the electromagnetic valve 17A, flows to the internal heat exchangers 4 and 5, is condensed and liquefied by them, and then flows into the electric expansion valve 7. To do. Then, after being depressurized, it flows into the internal heat exchanger 3. The refrigerant flowing into the internal heat exchanger 3 is vaporized inside the internal heat exchanger 3 and then returns to the compressor 1 through the gas-liquid separator 10.
[0022]
Thus, in the thing of FIG. 3, the internal heat exchangers 4 and 5 act as a condenser, and the internal heat exchanger 3 acts as an evaporator. As a result, the storage room A is cooled, and the remaining two storage rooms B and C are heated. At that time, the capacity of the internal heat exchanger 3 is 3, the capacity of the internal heat exchanger 4 is 1, and the capacity of the internal heat exchanger 5 is 2. It becomes unnecessary.
[0023]
Next, the case where the storage rooms A and C are cooled and only the storage room B is heated, that is, the case of CHC operation will be described. FIG. 4 is a refrigerant circuit diagram during CHC operation. The sales control unit 22 opens the electromagnetic valve 15A of the external heat exchanger 2 and closes the other electromagnetic valve 15B. Further, the electromagnetic valves 16A and 17B of the internal heat exchangers 4 and 5 are opened, and the other electromagnetic valves 16B and 17A are closed. Moreover, the electric expansion valve 6 of the external heat exchanger 2 and the electric expansion valve 8 of the internal heat exchanger 5 are fully opened, and the electric expansion valves 7 and 9 of the internal heat exchangers 3 and 5 are connected to the chambers A and C. The opening degree is adjusted according to the temperature.
[0024]
In this state, the refrigerant discharged from the compressor 1 is divided into the electromagnetic valve 15A and the electromagnetic valve 16A, flows to the external heat exchanger 2 and the internal heat exchanger 4, and is condensed and liquefied by them, and then is electrically expanded. Distributed to valves 7 and 9. Then, after being depressurized, it flows into the internal heat exchangers 3 and 5. The refrigerant flowing into the internal heat exchangers 3 and 5 is vaporized inside the internal heat exchangers 3 and 5 and then returns to the compressor 1 through the gas-liquid separator 10.
[0025]
Thus, in the thing of FIG. 4, the external heat exchanger 2 and the internal heat exchanger 4 act as a condenser, and the internal heat exchangers 3 and 5 act as an evaporator. As a result, the two storage rooms A and C are cooled, and the remaining storage room B is heated. At that time, the capacity of the internal heat exchanger 3 is 3, the capacity of the internal heat exchanger 5 is 2, and the capacity of the internal heat exchanger 4 is 1. Therefore, the sales control unit 22 adjusts the refrigerant pressure so that the refrigerant pressure does not become unbalanced by lowering the rotational speed of the fan 11 of the external heat exchanger 2.
[0026]
Next, a case where the three chambers A, B, and C are cooled together, that is, a case of CCC operation will be described. FIG. 5 is a refrigerant circuit diagram during CCC operation. The sales control unit 22 opens the electromagnetic valve 15A of the external heat exchanger 2 and closes the other electromagnetic valve 15B. Further, the electromagnetic valves 16A and 17A of the internal heat exchangers 4 and 5 are closed, and the other electromagnetic valves 16B and 17B are opened. And the electric expansion valve 6 of the external heat exchanger 2 is fully opened, and the opening degree of the electric expansion valves 7 to 9 of the internal heat exchangers 3 to 5 is adjusted according to the temperature of each chamber.
[0027]
In this state, the refrigerant discharged from the compressor 1 flows from the electromagnetic valve 15A to the external heat exchanger 2 and is condensed and liquefied, then distributed to the electric expansion valves 7 to 9 and decompressed there, and then the internal heat. It flows into the exchangers 3-5. The refrigerant that has flowed into the internal heat exchangers 3 to 5 is vaporized inside the internal heat exchangers 3 to 5, and then returns to the compressor 1 through the gas-liquid separator 10.
[0028]
Thus, in the thing of FIG. 5, the external heat exchanger 2 acts as a condenser, and the internal heat exchangers 3-5 act as an evaporator. As a result, all of the three storage rooms A, B, and C are cooled.
[0029]
Among the above operation modes, the present invention operates as shown in the examples shown in FIGS. 1, 3 and 4 by operating the internal heat exchanger of any one or two storage rooms as a condenser. This is applied when the room is heated and the other storage rooms are cooled. In this way, when the vending machine is started up after setting the refrigerant circuit to heat some of the storage rooms and cool the remaining storage rooms, The opening degree of the electric expansion valve in the storage room is made wider than the set opening degree at the normal time. In other words, if the opening of the electric expansion valve should be set so that the internal temperature of the cooling storage room is 5 ° C., the internal temperature of the heating storage room after the start is higher than the predetermined temperature. Until the temperature rises, the opening of the electric expansion valve is set so that the inside temperature of the cooling compartment is about 7 ° C.
[0030]
When the opening degree of the electric expansion valve is widened as described above, the throttle action (decompression action) is reduced and the evaporation temperature in the internal heat exchanger is increased. And when the evaporation temperature rises, the condensation temperature of the internal heat exchanger acting as a condenser also rises. Moreover, since the refrigerant circulation amount to the heat exchanger is increased by widening the opening of the electric expansion valve, the heat exchange action is enhanced, and the condensation temperature of the internal heat exchanger acting as a condenser reaches a predetermined temperature. The time until is shortened.
[0031]
That is, when the internal temperature of the cooling chamber is set to 5 ° C. as usual and the compressor 1 is started at the time point t 0 , the internal temperature decreases as shown by the dotted line D in FIG. On the other hand, the internal temperature of the warming chamber increases slowly as shown by the dotted line in FIG. 6 and reaches the set temperature T S at time t 2 .
[0032]
On the other hand, when the internal temperature of the cooling chamber is set to 7 ° C., which is slightly higher than usual, the opening of the electric expansion valve in the cooling chamber becomes wider than usual, and the internal temperature is as shown in FIG. As shown by the solid line C, it gradually decreases from the dotted line D. On the other hand, the inside temperature of the warming chamber rises earlier than the dotted line B as shown by the solid line A in FIG. 6, and reaches the set temperature T S at time t 1 earlier by Δt than time t 2 . The period from the time point t 0 to the time point t 1 is called a pull-up period, and its length takes about 8 to 12 hours. After that, a steady state heating operation is started.
[0033]
As described above, when the internal temperature of the cooling chamber is set to a slightly higher temperature than usual, the opening of the electric expansion valve of the cooling chamber becomes wide, and the cooling rate of the internal temperature of the cooling chamber is slow. Become. However, when the storage room inside the vending machine is used for heating, since the outside air temperature is often low, such as in winter, the temperature drop in the cooling storage room slows down. The faster the room temperature rises, the better the sales. From such a point of view, in the vending machine control device of the present invention, when the vending machine is started, the set temperature of the cooling chamber is increased so that the opening of the electric expansion valve is wider than the set opening at the time of steady operation. It was to be. Next, a pull-up control procedure will be described using a flowchart.
[0034]
FIG. 7 is a flowchart showing a pull-up control procedure of the vending machine control apparatus of the present invention.
Step 1 ... Set the internal temperature of the cooling chamber to 7 ° C, which is slightly higher than usual.
Step 2 ... Start the compressor at a low speed (for example, a power supply frequency of 50 Hz) and gradually accelerate to a predetermined speed (for example, a power supply frequency of 80 Hz) higher than the steady speed so as not to put a burden on the compressor (for example, Increase the power frequency by 5 Hz / 5 min.) The compressor is driven by an inverter and is operated at a rotational speed corresponding to the power supply frequency.
[0035]
Step 3 ... acquires the temperature T C of the next販商products warming cabinet chamber from a temperature sensor provided in for warming cabinet chamber pressure.
Step 4: It is determined whether or not the temperature T C of the next sale product has reached a set temperature, for example, 60 ° C.
[0036]
Step 5... When the set temperature is reached, the set temperature of the internal temperature of the cooling chamber is set to the normal 5 ° C.
Step 6: The operation speed of the compressor is reduced to a steady speed (for example, a power supply frequency of 50 Hz), and a steady operation is started.
[0037]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
That is, the vending machine control device according to claim 1 is the vending machine control device according to claim 1, wherein the vending machine control device heats some of the storage rooms and cools the remaining storage rooms. At the time of startup, the opening of the electric expansion valve in the cooling chamber is made wider than the set opening in the subsequent steady operation until the temperature in the chamber after heating rises to a predetermined temperature or higher. Therefore, when the vending machine is started, the time for the temperature in the heating chamber to rise to the set temperature can be shortened.
[0038]
The automatic vending machine controller according to claim 2, after the compressor is started, gradually accelerated to reach a higher than normal rate a predetermined speed, then the inside temperature of the warming compartment chamber Since the steady speed is set when the set value is reached, the time for the temperature in the heating cabinet to rise to the set temperature is further reduced when the vending machine is started while preventing damage to the compressor. Can do.
[Brief description of the drawings]
FIG. 1 is a refrigerant circuit diagram of a vending machine to which the present invention is applied.
FIG. 2 is a control block diagram of the vending machine control device of the present invention.
FIG. 3 is a refrigerant circuit diagram during CHH operation.
FIG. 4 is a refrigerant circuit diagram during CHC operation.
FIG. 5 is a refrigerant circuit diagram during CCC operation.
FIG. 6 is a change diagram of the internal temperature at the time of pull-up.
FIG. 7 is a flowchart showing a pull-up control procedure of the vending machine control device of the present invention.
FIG. 8 is an internal structure diagram of the vending machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... External heat exchanger 3-5 ... Internal heat exchanger 6-9 ... Electric expansion valve 11-14 ... Fan 15A-17B ... Solenoid valve 18A-20B ... Temperature sensor 27 ... Electric heater 28 ... Earth leakage interruption Container 29 ... Product rack 30 ... Unloading chute 31 ... Insulation partition wall 32 ... Outer insulation wall

Claims (2)

断熱性の壁で区画された複数の庫室を有し、各庫室にはそれぞれ電動膨張弁付きの内部熱交換器及びファンが設けられ、それらの電動膨張弁と内部熱交換器は、庫室外に設けられた圧縮機と外部熱交換器に接続され、電磁弁で冷媒の流れ方向を切り換えることにより前記それぞれの内部熱交換器を蒸発器として作用させて庫室内を冷却したり、凝縮器として作用させて庫室内を加温したりできるようにした自動販売機を制御する自動販売機制御装置であって、
一部の庫室を加温し、残りの庫室を冷却する際の自動販売機起動時に、起動後加温用庫室の庫内温度が所定の温度以上に上昇するまで、冷却用庫室の電動膨張弁の開度を、その後の定常運転における設定開度より広くすることを特徴とする自動販売機制御装置。
It has a plurality of compartments partitioned by heat insulating walls, and each compartment is provided with an internal heat exchanger and a fan with an electric expansion valve, and the electric expansion valve and the internal heat exchanger are A compressor and an external heat exchanger provided outside are connected to each other, and by switching the flow direction of the refrigerant with a solenoid valve, each of the internal heat exchangers acts as an evaporator to cool the inside of the warehouse, or a condenser A vending machine control device for controlling a vending machine that can act as a warmer in the storage room,
When the vending machine is started when some of the storage rooms are heated and the remaining storage rooms are cooled , the cooling storage room is kept until the internal temperature of the heating storage room rises above the specified temperature after startup. The vending machine control device characterized in that the opening of the electric expansion valve is made wider than the set opening in the subsequent steady operation .
圧縮機を起動させた後、定常速度より高い所定速度に達するまで徐々に加速し、その後、加温用庫室の庫内温度が設定値に達したとき定常速度にすることを特徴とする請求項1記載の自動販売機制御装置。After the compressor is started, gradually accelerated to reach a higher than normal rate a predetermined speed, then, characterized by a steady rate when the internal temperature of the warming cabinet chamber has reached a set value The vending machine control device according to claim 1.
JP2001087687A 2001-03-26 2001-03-26 Vending machine controller Expired - Fee Related JP4362985B2 (en)

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